CN117054006A - Device and method for detecting sealing performance of needle tube of injector - Google Patents

Abstract

The application relates to the technical field of needle tube tightness detection, and discloses a device and a method for detecting the needle tube tightness of an injector, wherein the device comprises a bottom plate, a turntable mechanism, a detection mechanism and a lifting mechanism, the detection mechanism comprises a piston, a connector and a detection cylinder, the connector is in sliding connection with the piston, an elastic piece is arranged between the connector and the piston, and a containing cavity for containing an object to be detected is formed in the detection cylinder; the sliding seat is arranged on the outer side of the piston in a sliding way, the air inlet mechanism for introducing detection air into the object to be detected is arranged in the piston, and a first switch for controlling the opening of the air inlet mechanism is arranged at the joint of the piston and the sliding seat. According to the application, the tightness of the joint of the needle tube and the needle head is detected by arranging the piston, the connector and the detection cylinder, so that the tightness of the joint of the needle tube and the needle head can be rapidly and effectively detected, the obtained detection result is easy to observe, and the phenomenon of false detection and missing detection is avoided.

Description

A device and method for testing the sealing performance of a syringe's needle tube

Technical field

The present invention specifically relates to the technical field of needle tube sealing performance detection, specifically a needle tube sealing performance detection device and detection method of a syringe.

Background technique

A syringe is a common medical appliance. As early as the 15th century, the Italian Cardinale proposed the principle of the syringe, which mainly used needles to extract or inject gas or liquid. Syringes can also be used to inject through rubber septa in medical equipment, containers, and scientific instruments such as some chromatographies.

Today's syringe production generally uses adhesives, including epoxy resin, quick-drying adhesive and light-curing adhesive. During assembly, the stainless steel needle tube or needle is inserted through the cylindrical barrel into the needle plug. The diameter of the needle plug is generally slightly larger than the needle tube. The joint between the needle plug and the needle barrel is the starting point for insertion. It passes through the center of the needle plug and adhesive can be attached around it. The design of the joint is crucial for the assembly of the needle plug and the needle tube. Appropriate design and adhesive can ensure that the syringe has good sealing, the injection liquid will not drip or flow randomly, and the needle can be pushed or pulled out smoothly during use. ;

After the syringe is produced, the sealing of the connection between the needle tube and the needle needs to be tested to ensure that the syringe can be used normally and in a limited manner. The sealing detection device in the existing technology cannot accurately separate good products from defective products, which can easily lead to incorrect detection and The phenomenon of missed detection affects the accuracy of syringe detection results.

Contents of the invention

The object of the present invention is to provide a device and method for testing the sealing performance of a syringe's needle tube, so as to solve the problems raised in the above background technology.

In order to achieve the above objects, the present invention provides the following technical solutions:

A needle tube sealing performance testing device for a syringe, including a base plate, a turntable mechanism, a detection mechanism and a lifting mechanism. The detection mechanism includes a piston, a connector and a detection barrel. The connector is slidingly connected to the piston, and is provided between the connector and the piston. There is an elastic member, and the inside of the detection tube is provided with a receiving cavity for accommodating the object to be measured;

The turntable mechanism includes a turntable and a rotation mechanism that controls the rotation of the turntable, and the turntable is provided with at least one placement slot for accommodating the detection tube;

The lifting mechanism includes a lifting adjustment mechanism and a telescopic part. The connecting head is connected to the telescopic end of the telescopic part. When the telescopic end of the telescopic part is extended, the piston is controlled to be inserted into the object to be measured;

A sliding seat is slidably installed on the outside of the piston. An air intake mechanism is provided inside the piston to pass detection gas into the object to be measured. A first switch is provided at the connection between the piston and the sliding seat to control the opening of the air intake mechanism. , when the piston is in the first state, the first switch controls the opening of the air inlet mechanism to introduce the detection gas into the interior of the object to be measured;

A second display mechanism is provided on the outside of the detection tube. The second display mechanism is connected to the accommodation cavity. When there is a leakage point at the connection between the needle tube and the needle, the detection gas enters the inside of the second display mechanism from the accommodation cavity. The second display mechanism After contacting the detection gas, a first display signal is emitted, and the first display signal indicates that there is leakage at the connection between the needle tube and the needle;

In addition, it should be noted that the first state is when the piston is inserted into the object to be measured, that is, after being inserted into the needle tube; a first display mechanism is installed on the connector, and a control point is provided at the connection between the connector and the piston. The second switch for turning on the first display mechanism, when the piston is in the second state, controls the first display mechanism to start to indicate that the connection between the needle tube and the needle head is well sealed.

As a further solution of the present invention: the first switch includes a first slide block and a second slide block, a plurality of slide grooves are provided on the circumferential side of the piston, and the first slide block and the second slide block are slidably installed on the Inside the chute, the first slide block is connected to the chute through a first spring; the sliding seat has a socket on one side facing the piston, and the second slide block extends into the socket.

As a further solution of the present invention: the air intake mechanism includes a power supply and a second air pump installed inside the piston. The power supply is electrically connected to the second air pump. The first slider and the second slider are opposite to each other. Electrode sheets are installed on both sides, and the power supply is also electrically connected to the electrode sheets through wires.

As a further solution of the present invention: the bottom of the piston is provided with an air outlet, the exhaust end of the second air pump is connected to the air outlet, and the air outlet is provided with a one-way valve; the piston is also provided with a one-way valve. An air inlet pipe for supplying air to the second air pump is provided.

As a further solution of the present invention: the elastic member provided between the connecting head and the piston is a second spring, the piston is provided with a column on one side facing the connecting head, and a hole is provided inside the connecting head for the column to A sliding slot, the column is connected to the slot through a second spring; the second switch is a first electrode plate provided on the top of the piston and a second electrode plate provided on the bottom of the connector, the first electrode plate and The second electrode plate is electrically connected to the first display mechanism.

As a further solution of the present invention: two opening grooves are symmetrically formed on the left and right sides of the detection tube, and a guide tube is slidably installed inside the opening groove on the same side as the second display mechanism, and the guide tube is connected to the other through a third spring. The bottom of the open slot is connected, and an adjusting rod is installed in the open slot on the other side for rotation. The upper part of the adjusting rod is provided with a threaded section; a first push plate and a second push plate are symmetrically installed on the left and right sides of the sliding seat. The shapes of the first push plate and the second push plate are adapted to the opening slots, and a screw sleeve is fixedly installed on the bottom of the second push plate.

As a further solution of the present invention: an air chamber is provided inside the guide tube, an air outlet is provided on one side of the guide tube, and an air inlet is provided on the other side of the guide tube, and the air outlet is located at the inlet Above the air hole, an exhaust channel is provided inside the piston. One end of the exhaust channel is connected to the accommodation cavity, and the other end of the exhaust channel is connected to an open slot provided with a guide tube.

As a further solution of the present invention: a baffle is also provided, the baffle is fixedly connected to the adjusting rod, an arc-shaped groove is provided at the bottom of the detection tube, and an exhaust port is provided inside the arc-shaped groove, so The exhaust port is connected to the accommodation cavity; an exhaust head and a blocking head are provided on the side of the baffle facing the arc-shaped groove.

As a further solution of the present invention: the second display mechanism includes a mounting base fixedly installed on the detection tube, a lampshade and a lamp holder. The tail of the lampshade is provided with a driving cavity, and the first electrode is fixedly installed inside the driving cavity. , a second electrode is also slidably installed inside the drive cavity. The first electrode and the second electrode are connected through a fourth spring, and the first electrode and the second electrode are electrically connected to the lamp holder. A gas inlet is provided on the mounting base. .

As a further solution of the present invention: the rotating mechanism includes a gearbox, a first motor and a rotating shaft. The gearbox is installed on the base plate. The first motor is installed on the gearbox. The first motor is connected to the gearbox through the gearbox. The rotating shaft is transmission connected, and the rotating shaft is fixedly connected to the turntable to drive the turntable to rotate so that the detection tube and the piston are aligned, and after the detection of the object to be measured inside one of the detection tubes is completed, the next one is loaded with the object to be measured. Align the detection tube of the measuring object with the piston.

As a further solution of the present invention: a first air pump is also installed on the rotating shaft. The first air pump is connected to the exhaust head through an air pipe and is used to pump out the inside of the accommodation cavity and the object to be tested before air tightness testing. is in a vacuum state.

As a further solution of the present invention: the lifting adjustment mechanism includes a frame, a lifting screw rotatably installed on the frame, and a lifting screw sleeve slidably installed on the frame, and the lifting screw is threadedly connected to the lifting screw sleeve. , and the lifting screw sleeve and the telescopic part are connected through the lifting seat for controlling the height of the telescopic part. In this embodiment, the telescopic part is a cylinder, an electric push rod or a hydraulic rod.

As a further solution of the present invention: a driving motor is also installed on the frame, and the driving motor is transmission connected with the lifting screw through a bevel gear set, and is used to drive the lifting screw to rotate.

A detection method of a needle tube sealing performance detection device of a syringe, including the following steps:

Step 1: Adjust the rotation of the turntable so that the detection tube containing the object to be measured on the turntable is aligned with the piston at the telescopic end of the telescopic part;

Step 2: Control the extension of the telescopic end of the telescopic part, drive the piston into the inside of the needle tube equipped with the needle, start the first air pump, and evacuate the inside of the detection cylinder accommodation chamber and the needle tube to a vacuum state;

Step 3: Continue to control the extension of the telescopic end of the telescopic part, drive the piston to the first state, and release the detection gas into the needle tube from the second air pump. After waiting for a period of time, observe whether the second display mechanism emits the first display signal;

Step 4: When the second display mechanism sends out the first display signal, the detection is completed, and the detection result is that the connection between the needle tube and the needle head is leaking; when the second display mechanism does not send out the first display signal, continue to control the telescopic end of the telescopic member Extend the connector to make contact with the piston, and observe whether the first display mechanism emits a second display signal. When the first display mechanism emits a second display signal, the detection is completed. The detection result is that there is no leakage at the connection between the needle tube and the needle, and the seal is Good sex.

Compared with the prior art, the beneficial effects of the present invention are: the present invention detects the sealing of the connection between the needle tube and the needle by providing a piston, a connector and a detection cylinder. During the detection process, the piston is driven to insert into the inside of the needle tube equipped with the needle. , start the first air pump, evacuate the inside of the detection cylinder accommodation chamber and the needle tube to a vacuum state, then drive the piston to the first state, release the detection gas into the inside of the needle tube through the second air pump, and observe whether the second display mechanism emits the first display signal; When the second display mechanism sends out the first display signal, the detection is completed, and the detection result is that the connection between the needle tube and the needle is leaking; when the second display mechanism does not send out the first display signal, the telescopic end of the telescopic member continues to be controlled to extend. Make the connector come into contact with the piston and observe whether the first display mechanism emits the second display signal. When the first display mechanism emits the second display signal, the detection is completed. The detection result is that there is no leakage at the connection between the needle tube and the needle, and the sealing is good. As a result, the sealing of the connection between the needle tube and the needle can be quickly and effectively tested, and the test results obtained are easy to observe, avoiding false detection and missed detection.

Description of the drawings

Figure 1 is a schematic structural diagram of a device for testing the sealing performance of a syringe's needle tube.

Figure 2 is a front view of the device for testing the sealing performance of the needle tube of the syringe.

Figure 3 is a side view of the device for testing the sealing performance of the needle tube of the syringe.

Figure 4 is a schematic structural diagram of the detection mechanism in the syringe needle tube sealing performance detection device.

Figure 5 is a schematic diagram 2 of the structure of the detection mechanism of the syringe needle tube sealing performance detection device.

Figure 6 is a partial enlarged schematic diagram of position A in Figure 5.

Figure 7 is a partial enlarged schematic diagram of position B in Figure 5.

Figure 8 is a schematic structural diagram of the guide tube in the device for testing the sealing performance of the needle tube of the syringe.

Figure 9 is a schematic structural diagram of the detection barrel in the device for testing the sealing performance of the needle tube of the syringe.

Figure 10 is a schematic structural diagram of the baffle in the device for testing the sealing performance of the needle tube of the syringe.

Figure 11 is a schematic structural diagram of the second display mechanism in the device for testing the sealing performance of the needle tube of a syringe.

In the picture: 10-base plate, 20-turntable mechanism, 21-gear box, 22-first motor, 23-rotating shaft, 24-turntable, 25-first air pump, 26-air pipe, 30-detection mechanism, 31-piston , 311-column, 312-first slider, 313-first spring, 314-second slider, 315-wire, 316-power supply, 317-second air pump, 318-one-way valve, 32-connector, 321-first display mechanism, 322-second spring, 33-sliding seat, 331-first push plate, 332-second push plate, 3321-thread sleeve, 34-detection tube, 341-guide tube, 3411- Air outlet, 3412-air chamber, 3413-air inlet, 342-third spring, 343-adjusting rod, 344-exhaust channel, 35-second display mechanism, 351-mounting base, 352-lampshade, 353-lamp holder , 354-first electrode, 355-fourth spring, 356-second electrode, 36-baffle, 361-exhaust head, 362-blocking head, 37-arc groove, 38-exhaust port, 40- Lifting mechanism, 41-frame, 42-driving motor, 43-lifting seat, 44-telescopic parts, 45-lifting screw, 46-lifting screw sleeve, 50-object to be measured.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Please refer to Figures 1 to 7. In an embodiment of the present invention, a device for testing the sealing performance of a syringe needle tube includes a base plate 10, a turntable mechanism 20, a detection mechanism 30 and a lifting mechanism 40. The detection mechanism 30 includes a piston 31, a connection The head 32 and the detection tube 34 are slidingly connected to the piston 31 . An elastic member is provided between the connection head 32 and the piston 31 . The inside of the detection tube 34 is provided with a chamber for accommodating the object to be measured 50 . , it can be seen from Figure 4 that during detection, the object to be tested 50 is in contact with the inner wall of the accommodation cavity. In this embodiment, the object to be tested 50 is a syringe needle equipped with a needle, and the detection mechanism 30 is used to detect the connection between the needle and the inner wall of the chamber. The tightness of the needle tube connection;

The turntable mechanism 20 includes a turntable 24 and a rotating mechanism that controls the rotation of the turntable 24. The turntable 24 is provided with at least one placement slot for accommodating the detection tube 34; the lifting mechanism 40 includes a lifting adjustment mechanism and a telescopic mechanism. The connector 32 is connected to the telescopic end of the telescopic member 44. When the telescopic end of the telescopic member 44 is extended, the control piston 31 is inserted into the object 50 to be measured.

A sliding seat 33 is slidably installed on the outside of the piston 31. An air intake mechanism is provided inside the piston 31 to introduce detection gas into the object 50 to be measured. The connection between the piston 31 and the sliding seat 33 is provided with an air intake mechanism to control the air intake. The first switch for opening the mechanism. When the piston 31 is in the first state, the first switch controls the opening of the air inlet mechanism to introduce detection gas into the interior of the object to be measured 50; a second display is provided on the outside of the detection tube 34 Mechanism 35, the second display mechanism 35 is connected with the accommodating cavity. When there is a leakage point at the connection between the needle tube and the needle, the detection gas enters the second display mechanism 35 from the accommodating cavity, and the second display mechanism 35 emits the first signal after contacting the detection gas. A display signal, the first display signal indicates that there is leakage at the connection between the needle tube and the needle; in addition, it should be noted that the first state is when the piston 31 is inserted into the object to be measured 50, that is, after being inserted into the inside of the needle tube.

A first display mechanism 321 is installed on the connector 32. A second switch is provided at the connection between the connector 32 and the piston 31 to control the opening of the first display mechanism 321. When the piston 31 is in the second state, the second switch The switch controls the activation of the first display mechanism 321 to send out a second display signal. The second display signal indicates that the connection between the needle tube and the needle head is well sealed;

It should be noted that when the seal between the needle tube and the needle is good, the detection gas is filled inside the object to be measured 50, the piston 31 moves downward to the maximum position and remains unchanged, and continues to press the connector 32. The connector 32 When the piston 31 comes into contact, the second switch is turned on. It can be understood that the second state is the contact state between the piston 31 and the connector 32 .

Further, in the embodiment of the present application, the first switch includes a first slider 312 and a second slider 314. A number of slide grooves are provided on the circumferential side of the piston 31. The first slider 312 and the second slider Two slide blocks 314 are slidably installed inside the slide groove. The first slide block 312 is connected to the slide groove through a first spring 313. The sliding seat 33 has a socket on one side facing the piston 31. The block 314 extends into the socket. In the initial state, as shown in Figure 4, the first slider 312 and the second slider 314 are separated. When the piston 31 moves toward the detection tube 34, the sliding seat 33 contacts the detection tube 34 and slides The seat 33 drives the second slider 314 to slide toward the first slider 312, so that the first slider 312 contacts the second slider 314;

The air intake mechanism includes a power supply 316 and a second air pump 317 installed inside the piston 31. The power supply 316 is electrically connected to the second air pump 317. The first slider 312 and the second slider 314 are on opposite sides. Both are equipped with electrode sheets, and the power supply 316 is also electrically connected to the electrode sheets through wires 315. When the first slider 312 contacts the second slider 314, the electrode sheets of the first slider 312 and the second slider 314 The contact of the chip is closed, thereby conducting the circuit, causing the power supply 316 to supply power to the second air pump 317, and the second air pump 317 is opened to introduce the detection gas into the interior of the object to be measured 50;

It should be noted that in the embodiment of the present application, an air outlet is provided at the bottom of the piston 31 , the exhaust end of the second air pump 317 is connected to the air outlet, and a one-way valve is provided on the air outlet. 318. The gas flow direction in the one-way valve 318 is to flow out from the inside of the piston 31; the piston 31 is also provided with an air inlet pipe (not shown in the figure) for supplying air to the second air pump 317 to provide detection. gas.

In addition, in the embodiment of the present application, the elastic member provided between the connecting head 32 and the piston 31 is a second spring 322. The piston 31 is provided with a column 311 on one side facing the connecting head 32. The connecting head 32 A slot is provided inside for the column 311 to slide, and the column 311 is connected to the slot through a second spring 322; the second switch is a first electrode plate provided on the top of the piston 31 and a first electrode plate provided on the connector 32 The second electrode plate at the bottom, the first electrode plate and the second electrode plate are electrically connected to the first display mechanism 321. When the sealing between the needle tube and the needle is good, the object to be measured 50 is filled with detection gas, and the piston 31 cannot move further. Press down, and continue to press down the connector 32, so that the connector 32 contacts the piston 31, the first electrode plate and the second electrode plate contact and close the power supply circuit of the first display mechanism 321, and the first display mechanism 321 emits a second display signal. The second display signal indicates that the connection between the needle tube and the needle head is well sealed.

Please refer to Figures 4, 5 and 7 again. In the embodiment of the present application, two opening grooves are symmetrically provided on the left and right sides of the detection tube 34, and the opening grooves on the same side as the second display mechanism 35 are slidably installed inside. There is a guide tube 341. The guide tube 341 is connected to the bottom of the opening groove through a third spring 342. An adjustment rod 343 is rotatably installed inside the opening groove on the other side. The upper part of the adjustment rod 343 is provided with a threaded section; the sliding seat 33 A first push plate 331 and a second push plate 332 are symmetrically installed on the left and right sides of the The screw sleeve 3321 is installed. When the sliding seat 33 moves downward with the piston 31, the first push plate 331 pushes the guide tube 341 to move downward, and the second push plate 332 drives the screw sleeve 3321 to move downward and connect with the adjusting rod 343. The threaded segments contact and mate to drive the adjusting rod 343 to rotate;

Further, in the embodiment of the present application, as shown in FIG. 8 , an air chamber 3412 is provided inside the guide tube 341 , an air outlet 3411 is provided on one side of the guide tube 341 , and an air chamber 3411 is provided on one side of the guide tube 341 . An air inlet hole 3413 is opened on the side, and the air outlet hole 3411 is located above the air inlet hole 3413; as shown in Figure 4, an exhaust channel 344 is provided inside the piston 31, and one end of the exhaust channel 344 is connected to the housing. The other end of the exhaust channel 344 is connected with the opening slot provided with the guide tube 341. In the initial state, the guide tube 341 rises upward under the elastic force of the third spring 342, and the air inlet 3413 is connected to the exhaust hole. The channel 344 is separated, and the gas inside the accommodation cavity cannot enter the inside of the guide tube 341. When the piston 31 moves downward and is in the first state, the first push plate 331 drives the guide tube 341 to slide downward, so that the air inlet 3413 is connected with the exhaust tube 341. The air channel 344 and the air outlet 3411 are connected with the second display mechanism 35 , so that the detection gas leaked from the needle tube in the accommodation cavity enters the interior of the second display mechanism 35 .

In addition, please refer to Figures 9 and 10. In the embodiment of the present application, a baffle 36 is also provided. The baffle 36 is fixedly connected to the adjustment rod 343, and an arc-shaped groove is provided at the bottom of the detection tube 34. 37. An exhaust port 38 is provided inside the arc-shaped groove 37, and the exhaust port 38 is connected with the accommodation cavity; the baffle 36 is provided with an exhaust head 361 and a blocking head 362 on one side facing the arc-shaped groove 37. , in the initial state, the exhaust head 361 is connected with the exhaust port 38. When the piston 31 has just extended into the object to be measured 50 and has not yet reached the first state, the object to be measured is moved through the exhaust head 361 and the exhaust port 38. 50 and the gas inside the accommodating cavity are extracted to keep the object to be measured 50 and the inside of the accommodating cavity in a vacuum state. When the piston 31 reaches the first state, the adjusting rod 343 rotates to drive the baffle 36 to rotate, so that the sealing head 362 is docked and exhausted. 38, thereby closing the exhaust port 38, maintaining the vacuum state inside the object to be measured 50 and the containing cavity, and improving the accuracy of sealing detection.

Please refer to Figure 11. In the embodiment of the present application, the second display mechanism 35 includes a mounting base 351 fixedly installed on the detection tube 34, a lampshade 352 and a lamp head 353. The tail of the lampshade 352 is provided with a driving cavity, so A first electrode 354 is fixedly installed inside the driving cavity, and a second electrode 356 is slidably installed inside the driving cavity. The first electrode 354 and the second electrode 356 are connected through a fourth spring 355, and the first electrode 354 and the second electrode 356 are connected by a fourth spring 355. The electrode 356 is electrically connected to the lamp holder 353. A gas inlet is provided on the mounting base 351. After the guide tube 341 is moved, the air outlet 3411 is connected to the gas inlet, allowing the detection gas to enter the interior of the driving cavity and drive the second electrode 356 toward the third One electrode 354 slides. When the second electrode 356 contacts the first electrode 354, the power circuit of the lamp head 353 is turned on, and the lamp head 353 emits a signal to display the light. The signal indicating the light is the first display signal.

Please refer to Figure 1 to Figure 3 again. In the embodiment of this application,

The rotating mechanism includes a gearbox 21, a first motor 22 and a rotating shaft 23. The gearbox 21 is installed on the base plate 10. The first motor 22 is installed on the gearbox 21. The first motor 22 passes through the gearbox 21. It is transmission connected with the rotating shaft 23, and the rotating shaft 23 is fixedly connected with the turntable 24 to drive the turntable 24 to rotate, so that the detection tube 34 and the piston 31 are aligned, and the object to be measured 50 inside one of the detection tubes 34 is detected. After completion, align the next detection cylinder 34 containing the object to be tested 50 with the piston 31. As for the loading and unloading of the object to be tested 50, a manipulator in the prior art can be used. This embodiment will not be described in detail here.

In addition, in the embodiment of the present application, a first air pump 25 is also installed on the rotating shaft 23. The first air pump 25 is connected to the exhaust head 361 through the air pipe 26 and is used to seal the accommodation cavity before the air tightness test. The inside of the object to be measured 50 is evacuated into a vacuum state.

In the embodiment of the present application, the lifting adjustment mechanism includes a frame 41, a lifting screw 45 rotatably installed on the frame 41, and a lifting screw sleeve 46 slidably installed on the frame 41. The lifting screw 45 and The lifting screw sleeve 46 is threaded, and the lifting screw sleeve 46 and the telescopic member 44 are connected through the lifting seat 43 for controlling the height of the telescopic member 44. In this embodiment, the telescopic member 44 is a cylinder, an electric push rod or a hydraulic rod. ;

Furthermore, a driving motor 42 is also installed on the frame 41 . The driving motor 42 is transmission connected with the lifting screw 45 through a bevel gear set and is used to drive the lifting screw 45 to rotate.

This application also discloses a method for testing the sealing performance of the needle cover of a syringe, which includes the following steps:

Step 1: Adjust the rotation of the turntable 24 so that the detection cylinder 34 equipped with the object to be measured 50 on the turntable 24 is aligned with the piston 31 at the telescopic end of the telescopic member 44;

Step 2: Control the telescopic end of the telescopic member 44 to extend, drive the piston 31 into the inside of the needle tube equipped with the needle, start the first air pump 25, and evacuate the chamber of the detection cylinder 34 and the inside of the needle tube into a vacuum state;

Step 3: Continue to control the telescopic end of the telescopic member 44 to extend, drive the piston 31 to reach the first state, and the second air pump 317 releases the detection gas into the needle tube. After waiting for a period of time, observe whether the second display mechanism 35 emits the first display signal. ;

Step 4: When the second display mechanism 35 sends out the first display signal, the detection is completed, and the detection result is that the connection between the needle tube and the needle is leaking; when the second display mechanism 35 does not send out the first display signal, continue to control the telescopic member 44 The telescopic end is extended to make the connector 32 contact the piston 31, and observe whether the first display mechanism 321 emits a second display signal. When the first display mechanism 321 emits a second display signal, the detection is completed, and the detection result is that the needle tube is connected to the needle. There is no leakage anywhere and the sealing is good.

To sum up, the present invention detects the sealing of the connection between the needle tube and the needle by providing the piston 31, the connector and the detection cylinder. During the detection process, the piston 31 is driven to insert into the inside of the needle tube equipped with the needle, and the first air pump 25 is started. Evacuate the inside of the detection cylinder accommodation chamber and the needle tube to a vacuum state, then drive the piston 31 to the first state, release the detection gas into the inside of the needle tube through the second air pump 317, and observe whether the second display mechanism emits the first display signal; when the second display When the mechanism sends out the first display signal, the detection is completed, and the detection result is that the connection between the needle tube and the needle is leaking; when the second display mechanism does not send out the first display signal, the telescopic end of the telescopic member continues to be controlled to extend, so that the connector and the The piston 31 is in contact, and it is observed whether the first display mechanism emits the second display signal. When the first display mechanism emits the second display signal, the detection is completed. The detection result is that there is no leakage at the connection between the needle tube and the needle, and the sealing is good, so that the The sealing of the connection between the needle tube and the needle can be quickly and effectively tested, and the test results obtained are easy to observe, avoiding false detection and missed detection.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be regarded as illustrative and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is therefore intended that all claims falling within the claims All changes within the meaning and scope of equivalent elements are included in the present invention. Any reference signs in the claims shall not be construed as limiting the claim in question.

In addition, it should be understood that although this specification is described in terms of implementations, not each implementation only contains an independent technical solution. This description of the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole. , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (10)

1. A needle tube sealing performance testing device for a syringe, characterized in that it includes a base plate (10), a turntable mechanism (20), a detection mechanism (30) and a lifting mechanism (40). The detection mechanism (30) includes a piston ( 31), the connecting head (32) and the detection cylinder (34). The connecting head (32) is slidingly connected to the piston (31), and an elastic member is provided between the connecting head (32) and the piston (31). The detection cylinder The interior of (34) is provided with a receiving cavity for accommodating the object to be measured (50); The turntable mechanism (20) includes a turntable (24) and a rotation mechanism that controls the rotation of the turntable (24). The turntable (24) is provided with at least one placement slot for accommodating the detection tube (34); The lifting mechanism (40) includes a lifting adjustment mechanism and a telescopic part (44). The connector (32) is connected to the telescopic end of the telescopic part (44). When the telescopic end of the telescopic part (44) is extended, it is controlled to The piston (31) is inserted into the object to be measured (50); A sliding seat (33) is slidably installed on the outside of the piston (31), and an air intake mechanism is provided inside the piston (31) to introduce detection gas into the object to be measured (50). The piston (31) and the sliding seat (33) are 33) is provided with a first switch that controls the opening of the air inlet mechanism, and the first switch controls the opening of the air inlet mechanism to introduce detection gas into the interior of the object to be measured (50); A second display mechanism (35) is provided on the outside of the detection tube (34). The second display mechanism (35) is connected to the accommodation chamber. When there is a leakage point at the connection between the needle tube and the needle, the detection gas enters the third display chamber from the accommodation chamber. Inside the second display mechanism (35), the second display mechanism (35) emits a first display signal after contacting the detection gas, and the first display signal indicates that there is leakage at the connection between the needle tube and the needle; A first display mechanism (321) is installed on the connector (32), and a second switch is provided at the connection between the connector (32) and the piston (31) to control the opening of the first display mechanism (321). The two switches control the activation of the first display mechanism (321) to send out a second display signal. The second display signal indicates that the connection between the needle tube and the needle head is well sealed. 2. The needle tube sealing performance detection device of a syringe according to claim 1, characterized in that the first switch includes a first slider (312) and a second slider (314), and the piston (31) A number of slide grooves are provided on the circumferential side. The first slide block (312) and the second slide block (314) are slidably installed inside the slide groove. The first slide block (312) passes through the first spring (313). Connected with the chute; the sliding seat (33) has a socket on one side facing the piston (31), and the second slider (314) extends into the socket. 3. The needle tube sealing performance detection device of a syringe according to claim 2, characterized in that the air inlet mechanism includes a power supply (316) and a second air pump (317) installed inside the piston (31), and the power supply (316) is electrically connected to the second air pump (317). Electrode sheets are installed on the opposite sides of the first slider (312) and the second slider (314). The power supply (316) also passes through wires. (315) is electrically connected to the electrode sheet. 4. The needle tube sealing performance detection device of a syringe according to claim 3, characterized in that an air outlet is provided at the bottom of the piston (31), and the exhaust end of the second air pump (317) is connected to the outlet. The air ports are connected, and the air outlet is provided with a one-way valve (318); the piston (31) is also provided with an air inlet pipe for supplying air to the second air pump (317). 5. The needle tube sealing performance testing device of a syringe according to claim 1, characterized in that the elastic member provided between the connector (32) and the piston (31) is a second spring (322), and the piston (31) A column (311) is provided on the side facing the connector (32). A slot is provided inside the connector (32) for the column (311) to slide. The column (311) passes through the third Two springs (322) are connected to the slot; the second switch is a first electrode plate provided at the top of the piston and a second electrode plate provided at the bottom of the connector (32). The first electrode plate and the second electrode plate Electrically connected to the first display mechanism (321). 6. The syringe needle tube sealing performance testing device according to claim 1, characterized in that two opening grooves are symmetrically provided on the left and right sides of the detection barrel (34), on the same side as the second display mechanism (35). A guide tube (341) is slidably installed inside the open slot. The guide tube (341) is connected to the bottom of the open slot through a third spring (342). An adjusting rod (343) is installed and rotated inside the open slot on the other side. The upper part of the rod (343) is provided with a threaded section; the first push plate (331) and the second push plate (332) are symmetrically installed on the left and right sides of the sliding seat (33). The first push plate (331) The shape of the second push plate (332) matches the opening slot, and a screw sleeve (3321) is fixedly installed on the bottom of the second push plate (332). 7. The needle tube sealing performance detection device of a syringe according to claim 6, characterized in that an air chamber (3412) is provided inside the guide tube (341), and an air chamber (3412) is provided on one side of the guide tube (341). The air outlet (3411) has an air inlet (3413) on the other side of the guide tube (341). The air outlet (3411) is located above the air inlet (3413). The inside of the piston (31) An exhaust channel (344) is provided, one end of the exhaust channel (344) is connected to the accommodation cavity, and the other end of the exhaust channel (344) is connected to the open slot provided with the guide tube (341). 8. The needle tube sealing performance detection device of a syringe according to claim 7, characterized in that it is also provided with a baffle (36), and the baffle (36) is fixedly connected to the adjusting rod (343). An arc-shaped groove (37) is provided at the bottom of the detection tube (34), and an exhaust port (38) is provided inside the arc-shaped groove (37). The exhaust port (38) is connected to the accommodation cavity; the baffle (36) An exhaust head (361) and a blocking head (362) are provided on the side facing the arc-shaped groove (37). 9. The syringe needle tube sealing performance detection device according to claim 1, characterized in that the second display mechanism (35) includes a mounting base (351) fixedly installed on the detection barrel (34), a lampshade (352) ) and the lamp holder (353), a driving cavity is provided at the tail of the lampshade (352), a first electrode (354) is fixedly installed inside the driving cavity, and a second electrode (356) is slidably installed inside the driving cavity, so The first electrode (354) and the second electrode (356) are connected through a fourth spring (355), and the first electrode (354) and the second electrode (356) are electrically connected to the lamp holder (353), and the mounting base A gas inlet is provided on (351). 10. A detection method of the needle tube sealing performance detection device of the syringe according to any one of claims 1 to 9, characterized in that it includes the following steps: Step 1. Adjust the rotation of the turntable (24) so that the detection cylinder (34) equipped with the object to be measured (50) on the turntable (24) is aligned with the piston (31) at the telescopic end of the telescopic part (44); Step 2: Control the telescopic end of the telescopic part (44) to extend, drive the piston (31) to insert into the inside of the needle tube equipped with the needle, and evacuate the chamber of the detection cylinder (34) and the inside of the needle tube into a vacuum state; Step 3: Continue to control the telescopic end of the telescopic member (44) to extend, drive the piston (31) to the first state, release the detection gas into the needle tube, wait for a period of time, and observe whether the second display mechanism (35) emits the first display signal; Step 4: When the second display mechanism (35) sends out the first display signal, the detection is completed, and the detection result is that the connection between the needle tube and the needle is leaking; when the second display mechanism (35) does not send out the first display signal, continue Control the telescopic end of the telescopic member (44) to extend so that the connector (32) contacts the piston (31). Observe whether the first display mechanism (321) sends out the second display signal. When the first display mechanism (321) sends out the second display signal, When the second signal is displayed, the test is completed. The test result is that there is no leakage at the connection between the needle tube and the needle, and the sealing is good.