CN107218208B - High pressure cleaner induction machine starts pressure relief device and includes device's pump body - Google Patents

Abstract

The present invention discloses a high-pressure cleaning machine induction motor starting pressure relief device and a pump body including the device, including: a pump head, a first connection port of the pump head is connected to a high-pressure water gun; an overflow valve, the overflow valve is installed in the second connection port of the pump head; a starting pressure relief device, the starting pressure relief device is installed in the third connection port of the pump head; a valve seat, the head of the valve seat can be pushed into the valve body connection hole. The starting pressure relief device includes: a valve cover, the valve cover through hole and the valve cover blind hole are interconnected; a valve body, the valve body opening is interconnected with the valve body blind hole through the valve body connection hole, and the lower section of the valve cover is installed in the valve body blind hole. By using the present invention, through the use of the starting pressure relief device, the internal pressure of the pump head in the high-pressure area can be connected with the internal pressure of the third connection port of the starting pressure relief device in the low-pressure area, forming an internal circulation state, effectively ensuring that the motor can run smoothly, so that the machine reaches a normal working state.

Description

High-pressure cleaner induction motor starting pressure relief device and pump body including the device

technical field

The invention relates to the technical field of a pump body of a high-pressure cleaner, in particular to a pressure relief device for starting an induction motor of a high-pressure cleaner, and a pump body including the pressure relief device for starting an induction motor of a high-pressure cleaner.

Background technique

A high-pressure cleaner is a machine that uses a power unit to make a high-pressure plunger pump generate high-pressure water to rinse the surface of an object. It can peel off and wash away the dirt to achieve the purpose of cleaning the surface of the object. The pump body of the existing high-pressure cleaning machine includes a pump head, one connection port of the pump head is connected to the high-pressure water gun, and the other connection port of the pump head is connected to the overflow valve, and the valve stem of the overflow valve is connected to the travel switch. When the machine is powered off, if a slight leak occurs inside the machine, the internal pressure of the pump head will gradually decrease. Relatively speaking, the spring of the overflow valve will push the valve core down slowly until the head of the overflow valve touches the At the second connection port, the valve stem is separated from the travel switch, causing the machine to be re-energized to start. However, due to the common problem of small starting torque in induction motors, the machine has restarted before the valve stem is completely disengaged. At this time, the internal pressure of the pump head is high, and there is not enough force to continue to drive the swash plate to rotate, and a The phenomenon of stalling, and the current is large at this time, may easily cause the machine to burn out.

Contents of the invention

In view of the above existing deficiencies, a pressure relief device for starting a high-pressure cleaner induction motor and a pump body including the pressure relief device for starting an induction motor of a high-pressure cleaner are provided.

In order to achieve the above object, the technical scheme that the present invention takes is:

A pressure relief device for starting an induction motor of a high-pressure cleaning machine, including: a valve cover, the lower end surface of the valve cover is provided with a valve cover blind hole along the centerline direction of the valve cover, and the outer surface of the valve cover is A bonnet through hole is opened in a direction perpendicular to the center line of the bonnet, and the bonnet through hole and the bonnet blind hole communicate with each other; the valve body, the upper end surface of the valve body is along the A valve body blind hole is opened in the centerline direction of the valve body, and a valve body opening is opened in the lower end surface of the valve body along the centerline direction of the valve body, and the valve body opening is connected to the valve body through a valve body connecting hole. The blind holes of the valve body communicate with each other; the lower section of the valve cover is installed in the blind hole of the valve body, and the opening of the valve body communicates with the blind hole of the valve cover through the connecting hole of the valve body.

The above-mentioned pressure relief device for induction motor starting of a high-pressure cleaner, wherein, the valve cover includes an upper section, a middle section and the lower section, the diameter of the middle section is larger than the diameter of the upper section and the lower section, and the diameter of the upper section The head is conical.

In the above-mentioned pressure relief device for starting an induction motor of a high-pressure cleaner, the through hole of the valve cover is located in the middle section.

The above-mentioned pressure relief device for induction motor starting of a high-pressure cleaner, wherein, the outer surface of the lower section surrounds a ring of protrusions along the centerline direction of the valve cover, and the inner wall of the blind hole of the valve body is along the center line of the valve cover. A circle of grooves is formed around the centerline of the body, and the protrusion matches the grooves.

In the above pressure relief device for starting an induction motor of a high-pressure cleaner, the connection hole of the valve body is tapered.

The above-mentioned pressure relief device for starting an induction motor of a high-pressure cleaner includes: a first O-ring, the first O-ring is installed in the blind hole of the valve body and abuts against the lower section.

The above-mentioned pressure relief device for starting an induction motor of a high-pressure cleaning machine includes: a second O-ring, the outer surface of the upper section surrounds a circle of grooves along the center line of the valve cover, and the first Two O-shaped sealing rings are embedded in the groove.

The above-mentioned pressure relief device for starting an induction motor of a high-pressure cleaning machine further includes: a third O-ring, the outer surface of the valve body is surrounded by a circle of grooves along the center line of the valve body, so that The third O-ring is inserted into the groove.

A pump body including a pressure relief device activated by an induction motor of a high-pressure cleaner, including: a pump head, the pump head has three connection ports formed in a "T" shape, and the first connection port of the pump head is connected to High-pressure water gun; overflow valve, the overflow valve is movably installed in the second connection port of the pump head, and the valve stem of the overflow valve is connected to the stroke switch; the start pressure relief device, the start pressure relief The device is movably installed in the third connection port of the pump head; the valve seat, the head of the valve seat can be pushed into the valve body connection hole through the valve body opening; the spring is sleeved on the valve body The outer surface of the valve seat, one end of the spring is against the tail of the valve seat, and the other end of the spring is against the opening of the valve body; and the water inlet joint is connected to the end of valve seat.

The above-mentioned pump body comprising a pressure relief device for starting an induction motor of a high-pressure cleaner, wherein the head of the overflow valve can block the second connection port; the head of the upper section of the pressure relief device for starting The part can block the third connection port.

The present invention has adopted above-mentioned technology, makes it have positive effect compared with prior art and is:

By starting the use of the pressure relief device, when the high-pressure cleaner is turned off and there is a slight leak inside the machine, the spring can push the valve body forward, so that the valve body opening of the valve body is separated from the head of the valve seat, so that the high-pressure cleaner is under high pressure. The internal pressure of the pump head in the low-pressure area is connected with the internal pressure of the third connection port in the low-pressure area through the valve cover through hole, the valve cover blind hole, the valve body connecting hole and the valve body opening, forming an internal circulation state, and the water can be used without any pressure. The resistance is discharged to the low-pressure area, effectively ensuring that the motor can run smoothly until the internal pressure rises little by little, so that the machine can reach a normal working state and avoid the occurrence of stalling.

Description of drawings

Fig. 1 is a schematic diagram of assembly of a pressure relief device for induction motor starting of a high-pressure cleaning machine of the present invention;

Fig. 2 is a schematic diagram of the working position of a pump body comprising a high-pressure cleaner induction motor starting pressure relief device of the present invention;

Fig. 3 is a schematic diagram of the pressure relief position of the pump body including the induction motor starting pressure relief device of the high pressure cleaning machine of the present invention;

Fig. 4 is a schematic diagram of a pressure-holding position of a pump body including a high-pressure cleaning machine induction motor starting pressure relief device of the present invention;

Fig. 5 is a schematic diagram of the momentary position of the internal leakage and restart of the pump body including the pressure relief device for the induction motor of the high-pressure cleaning machine during pressure maintenance of the present invention;

Fig. 6 is a schematic diagram of the self-suction position of the pump body including the induction motor starting pressure relief device of the high-pressure cleaner according to the present invention.

In the accompanying drawings: 1, bonnet; 11, blind hole of bonnet; 12, through hole of bonnet; 13, protrusion; 14, groove; 2, valve body; 21, blind hole of valve body; 22, opening of valve body ;23, valve body connection hole; 24, groove; 25, groove; 3, the first O-ring; 4, the second O-ring; 5 the third O-ring; 6, pump head; 61 , the first connection port; 62, the second connection port; 63, the third connection port; 7, overflow valve; 71, spring; 72, valve stem; 73, valve core; 8, valve seat; 9, spring; 10 , Water inlet connector.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Fig. 1 is a schematic diagram of an assembly of a pressure relief device for starting an induction motor of a high-pressure cleaner, please refer to Fig. 1 . It shows a preferred embodiment of a pressure relief device for starting an induction motor of a high-pressure cleaner, which includes a valve cover 1, and a valve cover blind hole 11 is opened inwardly along the center line of the valve cover 1 on the lower end surface of the valve cover 1 . At the same time, on the outer surface of the bonnet 1, a bonnet through hole 12 is opened inwardly along the direction perpendicular to the centerline of the bonnet 1, and the bonnet blind hole 11 is connected to the middle section of the bonnet through hole 12, so that the bonnet The through hole 12 and the blind hole 11 of the valve cover can communicate with each other, so that tap water can flow through the through hole 12 of the valve cover and the blind hole 11 of the valve cover.

Further, as a preferred embodiment, the induction motor starting pressure relief device of the high-pressure cleaner includes a valve body 2 , and a valve body blind hole 21 is opened inwardly along the center line of the valve body 2 on the upper end surface of the valve body 2 . Simultaneously, a valve body opening 22 is provided inwardly along the centerline direction of the valve body 2 on the lower end surface of the valve body 2, and the valve body opening 22 communicates with the valve body blind hole 21 through a valve body connection hole 23, so that tap water can Through the valve body opening 22 , the valve body connection hole 23 and the valve body blind hole 21 .

In addition, as a preferred embodiment, during installation, the lower section of the valve cover 1 is installed in the blind hole 21 of the valve body, and the opening 22 of the valve body communicates with the blind hole 11 of the valve cover through the connecting hole 23 of the valve body.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the implementation and protection scope of the present invention.

Please continue to refer to Fig. 1, in a preferred embodiment, the bonnet 1 includes an upper section, a middle section and a lower section, the upper section, the middle section and the lower section are integrally formed, and the diameter of the middle section of the bonnet 1 is larger than that of the upper section of the bonnet 1 and the diameter of the lower section.

Further, in a preferred embodiment, the shape of the head of the upper section of the valve cover 1 is approximately conical.

In addition, in a preferred embodiment, the valve cover through hole 12 is located in the middle section of the valve cover 1 . The valve cover through hole 12 is opened inwardly along the direction perpendicular to the center line of the valve cover 1 on the outer surface of the middle section of the valve cover 1 .

On the other hand, in a preferred embodiment, a circle of protrusions 13 protrudes outward along the center line of the valve cover 1 on the outer surface of the lower section of the valve cover 1 . At the same time, the inner wall of the blind hole 21 of the valve body is recessed inward along the centerline of the valve body 2 to form a circle of grooves 24 . When the lower section of the valve cover 1 is installed in the blind hole 21 of the valve body, the protrusion 13 can match with the groove 24 .

In addition, in a preferred embodiment, the valve body connecting hole 23 is approximately tapered in shape. The diameter of the valve body connection hole 23 close to the valve body blind hole 21 is smaller than the diameter of the valve body connection hole 23 close to the valve body opening 22 .

Further, in a preferred embodiment, the pressure relief device for starting the induction motor of the high-pressure cleaner includes a first O-ring 3, the first O-ring 3 is installed in the blind hole 21 of the valve body, and the first The O-ring 3 is against the lower section of the bonnet 1, so that the installed first O-ring 3 can be closely attached between the bottom of the blind hole 21 of the valve body and the lower section of the bonnet 1, effectively sealing effect.

Further, in a preferred embodiment, the pressure relief device for starting the induction motor of the high-pressure cleaner includes a second O-ring 4, and the outer surface of the upper section of the valve cover 1 surrounds inwardly along the centerline of the valve cover 1. A circle of groove 14 is provided, and the second O-ring 4 is inserted into the groove 14 .

Furthermore, in a preferred embodiment, the induction motor starting pressure relief device of the high-pressure cleaner also includes a third O-ring 5, and the outer surface of the valve body 2 surrounds inwardly along the centerline of the valve body 2. A circle of groove 25 is provided, and the third O-ring 5 is embedded in the groove 25 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the implementation and protection scope of the present invention.

FIG. 2 is a schematic diagram of a working position of a pump body including a pressure relief device for starting an induction motor of a high-pressure cleaner, please refer to FIG. 2 . It shows a pump body including a pressure relief device for starting a high-pressure cleaning machine induction motor in a preferred embodiment, including a pump head 6, and the pump head 6 has three connection ports, the first connection port 61, the second connection port 62 Combined with the third connection port 63, the first connection port 61, the second connection port 62 and the third connection port 63 to form a "T" shape, the first connection port 61 of the pump head 6 is connected to a high-pressure water gun (not shown in the figure) out).

In addition, as a preferred embodiment, the pump body including the pressure relief device activated by the induction motor of the high-pressure cleaner includes an overflow valve 7, and the overflow valve 7 includes a spring 71, a valve stem 72 and a valve core 73, and the overflow valve 7 It is movably installed in the second connection port 62 of the pump head 6, and the valve rod 72 of the overflow valve 7 is connected with a travel switch (not shown in the figure).

In addition, as a preferred embodiment, the pump body including the starting pressure relief device for the induction motor of the high-pressure cleaner includes the starting pressure relief device.

And, as a preferred embodiment, the pump body including the pressure relief device activated by the induction motor of the high-pressure cleaner includes a valve seat 8, and the head of the valve seat 8 can pass through the valve body opening 22 and push into the valve body connection hole 23 .

Further, as a preferred embodiment, the pump body including the pressure relief device activated by the induction motor of the high-pressure cleaner includes a spring 9, the spring 9 is sleeved on the outer surface of the valve seat 8, and one end of the spring 9 is against the valve seat 8 The other end of the spring 9 is against the opening 22 of the valve body. The installed valve seat 8 and spring 9 together with the actuating pressure relief device are installed in the third connection port 63 of the pump head 6 , and the actuation pressure relief device can move in the third connection port 63 through the spring 9 .

Furthermore, as a preferred embodiment, the pump body including the pressure relief device activated by the induction motor of the high-pressure cleaner also includes a water inlet joint 10, and the water inlet joint 10 is connected to the tail of the valve seat 8 through the third connection port 63 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the implementation and protection scope of the present invention.

Next, the working method of the pump body including the pressure relief device activated by the induction motor of the high-pressure cleaner in a preferred embodiment will be described.

Please continue to refer to Figure 2, in a preferred embodiment, when the high-pressure cleaner is turned on, the normal working pressure of the pump head 6 is 120bar, and the recoil force set by the spring 71 of the overflow valve 7 is equivalent to 140bar, Therefore, at this time, the head of the overflow valve 7 can block the second connection port 62, and the overflow valve 7 is in a closed state. The pressure set by the spring 9 that activates the pressure relief device is equivalent to 20bar, which is far lower than the normal working pressure of the pump head 6, which is 120bar. The pressure pushes the valve body 2 back against the valve seat 8, so that the head of the valve seat 8 passes through the valve The body opening 22 is pushed into the valve body connecting hole 23, so that the valve cover blind hole 11 is blocked by the head of the valve seat 8 to avoid the circulation of running water, so that the start-up pressure relief device is also in the closed state, and finally the water is completely drained by the first valve body. The connection port 61 is discharged to the outside.

Fig. 3 is a schematic diagram of a pressure relief position of a pump body including a pressure relief device activated by an induction motor of a high-pressure cleaner. Please refer to Fig. 3. In a preferred embodiment, when the high-pressure cleaner is closed, the overflow valve 7 becomes the only pressure relief channel. The pressure of the pump head 6 instantly rises to more than 140bar, which is greater than the recoil force set by the spring 71 of the overflow valve 7, so that the overflow valve 7 is pushed backward, so that the valve stem 72 of the overflow valve 7 touches the travel switch, and finally the machine When the power is cut off, the high-pressure water flows back to the low-pressure area of the water inlet through the pressure relief hole. At the same time, since the pressure set by the spring 9 of the actuating pressure relief device is equivalent to 20 bar, which is far lower than 140 bar, the actuating pressure relief device is in a closed state.

Fig. 4 is a schematic diagram of the pressure-holding position of the pump body including the pressure relief device activated by the induction motor of the high-pressure cleaner. Please refer to Fig. 4 . The power is cut off due to the limit switch, but the motor needs to continue to run for a short period of time under the action of inertia, and then slowly stop. The internal pressure of the pump head 6 gradually decreases from 140 bar, the spool 73 of the relief valve 7 falls back slowly under the action of the spring 71 , and the head of the relief valve 7 gradually approaches the second connection port 62 . Although the valve rod 73 falls back slowly, it is still against the travel switch, so that the machine is still in the power-off state. When the internal pressure of the pump head 6 is as low as 25-30 bar, the pressure at both ends of the overflow valve 7 is balanced, that is, the pressure generated by the spring 71 is equal to the pressure of the internal high-pressure water of the pump head 6, so the overflow valve 7 maintains balance. Keep it under pressure. At the same time, since the pressure set by the spring 9 of the starting pressure relief device is equivalent to 20 bar, which is lower than 25-30 bar, the starting pressure relief device is in a closed state.

Figure 5 is a schematic diagram of the momentary position of the internal leakage and restart of the pump body including the pressure relief device for the induction motor of the high-pressure cleaner during pressure maintenance. Please refer to Figure 5. In a preferred embodiment, the high-pressure cleaner is in the In the closed state, if a slight leakage occurs inside the machine, the internal pressure of the pump head 6 will gradually decrease. Relatively speaking, the spring 71 of the overflow valve 7 pushes the valve core 73 to fall slowly until the head of the overflow valve 7 touches the At the second connection port 62, the internal pressure of the pump head 6 is less than 20 bar at this time, which is about 16-18 bar. Since the head of the overflow valve 7 is against the second connection port 62, the valve rod 72 is separated from the travel switch, causing the machine to be powered on again to start. Since the pressure set by the spring 9 that activates the pressure relief device is equivalent to 20bar, which is greater than the internal pressure of the pump head 6 by 16-18bar, the spring 9 pushes the valve body 2 forward, so that the valve body opening 22 of the valve body 2 is separated from the valve seat 8 head, so that the internal pressure of the pump head 6 in the high pressure area passes through the valve cover through hole 12, the valve cover blind hole 11, the valve body connection hole 23 and the valve body opening 22 and the third connection port 63 in the low pressure area The internal pressure of the pump is connected, and the internal pressure of the pump head 6 is only the water inlet pressure at this time. The starting torque of the motor generated by re-energizing the machine is small, but because the high-pressure area and the low-pressure area are connected, the machine forms an internal circulation state, and the water can be discharged to the low-pressure area without resistance, effectively ensuring that the motor can run smoothly until the internal The pressure rises little by little. When the pressure rises to more than 20bar, the starting pressure relief device is closed again, and the machine reaches the normal working state.

Fig. 6 is a schematic diagram of the self-priming position of a pump body including a pressure relief device activated by an induction motor of a high-pressure cleaner. Please refer to Fig. 6. In a preferred embodiment, when there is no running water in the pump body 6, The pump body 6 can work by sucking water voluntarily as a water pump. At this time, the pressure relief device is started to make the second O-ring 4 of the valve cover 1 and the inner hole taper surface of the third connection port 63 closely contact under the action of the spring 9, thereby completely separating the high pressure area from the low pressure area, When the motor is running, the internal air is continuously discharged outwards, so that the inside of the pump body 6 forms a vacuum, and the water in the external bucket is pressed into the inside of the pump body 6 under atmospheric pressure. When the pump body 6 runs stably, the pressure relief device is pushed backward under high pressure until the valve body connection hole 23 touches the head of the valve seat 8, and the contact between the first O-ring 3 and the head of the valve seat 8 The tapered surfaces cooperate to form a seal, so that the head of the valve seat 8 blocks the blind hole 11 of the valve cover and enters the normal working position, as shown in FIG. 2 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the implementation and protection scope of the present invention. For those skilled in the art, they should be able to realize that all equivalents made by using the description and illustrations of the present invention The solutions obtained by replacement and obvious changes shall all be included in the protection scope of the present invention.

Claims (10)

1. A pressure relief device for starting an induction motor of a high-pressure cleaner, characterized in that it comprises: A bonnet, the lower end surface of the bonnet is provided with a bonnet blind hole along the centerline direction of the bonnet, and a bonnet is opened on the outer surface of the bonnet along the direction perpendicular to the centerline of the bonnet a through hole, and the through hole of the valve cover communicates with the blind hole of the valve cover; A valve body, the upper end surface of the valve body is provided with a valve body blind hole along the centerline direction of the valve body, and the lower end surface of the valve body is provided with a valve body opening along the centerline direction of the valve body, and The opening of the valve body communicates with the blind hole of the valve body through a valve body connecting hole; The lower section of the valve cover is installed in the blind hole of the valve body, and the opening of the valve body communicates with the blind hole of the valve cover through the connecting hole of the valve body. 2. The pressure relief device for starting the induction motor of the high-pressure cleaning machine according to claim 1, characterized in that, The valve cover includes an upper section, a middle section and the lower section, the diameter of the middle section is larger than that of the upper section and the lower section, and the head of the upper section is tapered. 3. The pressure relief device for starting the induction motor of the high-pressure cleaning machine according to claim 2, characterized in that, The valve cover through hole is located in the middle section. 4. The pressure relief device for starting the induction motor of the high-pressure cleaning machine according to claim 2, characterized in that, The outer surface of the lower section surrounds a ring of protrusions along the center line of the valve cover, and the inner wall of the blind hole of the valve body surrounds a ring of grooves along the center line of the valve body. The grooves match. 5. The pressure relief device for starting the induction motor of the high-pressure cleaning machine according to claim 1, characterized in that, The connecting hole of the valve body is tapered. 6. The pressure relief device for starting the induction motor of the high-pressure cleaning machine according to claim 1, characterized in that it comprises: A first O-shaped sealing ring, the first O-shaped sealing ring is installed in the blind hole of the valve body and abuts against the lower section. 7. The pressure relief device for starting the induction motor of the high-pressure cleaning machine according to claim 2, characterized in that it comprises: For the second O-shaped sealing ring, a groove is formed around the outer surface of the upper section along the center line of the valve cover, and the second O-shaped sealing ring is embedded in the groove. 8. The pressure relief device for starting the induction motor of the high-pressure cleaning machine according to claim 1, further comprising: As for the third O-shaped sealing ring, a groove is formed around the outer surface of the valve body along the center line of the valve body, and the third O-shaped sealing ring is embedded in the groove. 9. A pump body including a pressure relief device for starting an induction motor of a high-pressure cleaner, characterized in that it includes: A pump head, the pump head has three connection ports formed in a "T" shape, the first connection port of the pump head is connected to a high-pressure water gun; An overflow valve, the overflow valve is movably installed in the second connection port of the pump head, and the valve stem of the overflow valve is connected to the travel switch; Start the pressure relief device, the start pressure relief device is the start pressure relief device for the induction motor of the high-pressure washer described in any one of claims 1 to 8, and the start pressure relief device is movably installed on the first part of the pump head Inside the three-connection port; A valve seat, the head of the valve seat can be pushed into the connecting hole of the valve body through the opening of the valve body; a spring, the spring is sleeved on the outer surface of the valve seat, one end of the spring is against the tail of the valve seat, and the other end of the spring is against the opening of the valve body; and A water inlet connector, the water inlet connector is connected to the tail of the valve seat. 10. According to claim 9, the pump body comprising the induction motor starting pressure relief device of the high-pressure cleaner is characterized in that, The head of the overflow valve can block the second connection port; The head of the upper section of the starting pressure relief device can block the third connection port.