CN113776726A - A pressure measuring joint and pressure measuring system - Google Patents
A pressure measuring joint and pressure measuring system Download PDFInfo
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- CN113776726A CN113776726A CN202110942084.0A CN202110942084A CN113776726A CN 113776726 A CN113776726 A CN 113776726A CN 202110942084 A CN202110942084 A CN 202110942084A CN 113776726 A CN113776726 A CN 113776726A
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- 239000000523 sample Substances 0.000 claims abstract description 43
- 238000007789 sealing Methods 0.000 claims abstract description 39
- 239000012530 fluid Substances 0.000 claims abstract description 33
- 238000009530 blood pressure measurement Methods 0.000 abstract description 64
- 230000000694 effects Effects 0.000 description 9
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- 238000000034 method Methods 0.000 description 4
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- 239000004033 plastic Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000035876 healing Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- KVNRLNFWIYMESJ-UHFFFAOYSA-N butyronitrile Chemical compound CCCC#N KVNRLNFWIYMESJ-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
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Abstract
本公开提供了一种测压接头及测压系统，属于管道阀门技术领域，包括壳体、橡胶柱、限位环、端盖，其中壳体内设置有空腔，橡胶柱、限位环通过过盈配合安装在空腔中，壳体的上下两端设置有螺纹，壳体与端盖螺纹连接，端盖与壳体上端的端口间设置有垫片或垫圈，橡胶柱数量为一个，其头部设置有圆台状结构。测压系统包括测压接头与测压探针，测压探针包括压柱、螺帽、针管、护套、旋盖等，测压时用针管戳穿橡胶柱，针管接触流体进行测压。本公开的测压接头及测压系统体积小、重量轻、密封性好、污染少、安全隐患低、应用范围广。
The present disclosure provides a pressure measuring joint and a pressure measuring system, belonging to the technical field of pipeline valves, comprising a casing, a rubber column, a limit ring, and an end cover, wherein a cavity is provided in the casing, and the rubber column and the limit ring pass through The interference fit is installed in the cavity, the upper and lower ends of the shell are provided with threads, the shell is connected with the end cap threadedly, and a gasket or washer is arranged between the end cap and the port on the upper end of the shell, the number of rubber columns is one, and its head The part is provided with a circular truncated structure. The pressure measuring system includes a pressure measuring connector and a pressure measuring probe. The pressure measuring probe includes a pressure column, a nut, a needle tube, a sheath, a screw cap, etc. When the pressure is measured, the needle tube is used to pierce the rubber column, and the needle tube contacts the fluid for pressure measurement. The pressure measuring joint and the pressure measuring system of the present disclosure are small in size, light in weight, good in sealing performance, less in pollution, low in safety hazard and have a wide application range.
Description
Technical Field
The invention belongs to the technical field of pipeline valves, and particularly relates to a pressure measuring joint and a pressure measuring system.
Background
In production and life, pressure detection is often required to be carried out on high-pressure and low-pressure fluid systems, if the mode of installing pressure measuring instruments with fixed interfaces at each measuring point is adopted to measure the fluid pressure in pipelines or other hydraulic devices, the investment cost is too high, and great burden is caused to users, so that pressure measuring joints are developed, cavities communicated with the fluid to be detected are arranged in the shell of the pressure measuring joints, and sealing elements (such as valve cores and rubber columns) and limiting rings are arranged in the cavities. The pressure measuring joint can keep the hydraulic system in a sealed state, has small and exquisite structure, low manufacturing cost and convenient connection with an instrument, is widely applied to occasions such as daily life, water conservancy companies, electric companies, sewage treatment plants and the like, and greatly improves the pressure measurement of the hydraulic system.
The first mode is that a thimble is used to push the valve core downwards to remove the sealing state, and the high-pressure fluid in the hydraulic system is automatically led out to a cavity above the valve core, and then pressure is measured.
For example, patent publication No. CN203927168U discloses a novel pressure measuring joint, which includes a joint body, a stepped hole formed in the length direction of the joint body for measuring pressure, and a valve core slidably positioned in the stepped hole; the method is characterized in that: the valve core is made of elastic materials and is arranged in a larger hole of the stepped hole, and the top end face of the valve core is matched with the stepped surface in the stepped hole so as to realize sealing fit; the outer circumference of the valve core is also provided with a gap which penetrates through the valve core in the length direction to facilitate the movement of fluid. The disclosed working principle is that the top conical surface of the valve core is matched with the step surface to realize sealing, the valve core is pushed downwards by the ejector pin to enable the top end surface of the valve core to be away from the step surface, high-pressure fluid flows out of the notch to the step hole at the top end of the valve core, then pressure measurement is carried out, and the valve core is pushed back to the original sealing position by the high pressure of the fluid after the pressure measurement is finished.
The above patents have the following disadvantages: the valve core is narrow in application scene and only suitable for pressure measurement of high-pressure fluid, and the top of the valve core cannot be maintained on the step surface by low-pressure or negative-pressure fluid, so that sealing cannot be realized; secondly, the pollution degree is high, and the corrosion and aging of the valve core are easily accelerated by fluid remained in the valve core, so that the service life of the pressure measuring joint is short; thirdly, potential safety hazards exist, and for parts of fluids, such as flammable and explosive gases and toxic gases, the fluids are led out from the original pipeline, so that the potential safety hazards are great, and the application scenes of the joint are further reduced; in addition, the problems that the selected opening is difficult to determine, the opening is easy to silt, leakage is easy to occur when the opening is influenced by unstable factors such as vibration, the requirement on the machining precision of the matching surface of the valve core and the stepped hole is high, the production cost is high and the like exist.
The second working mode of the pressure measuring joint is as follows: the case is not set up in the cavity, but interference fit's rubber column, use the pressure measurement probe to insert and puncture the rubber column during the pressure measurement, the pressure measurement probe directly probes into and carries out the pressure measurement in the fluid that awaits measuring, the pressure measurement probe extracts the back, because the material characteristic of rubber itself, the pinhole healing, the rubber column of here is through interference fit assembly, the magnitude of interference that the casing that the relative pressure measurement of rubber column connects exists is more, then the cylinder of rubber and casing contact is inseparabler more by the extruded, sealed effect is better, and simultaneously, it is more difficult to assemble.
For example, patent publication No. CN206449291U discloses a quick-insertion pressure measuring nozzle for a valve. The novel valve comprises a valve body, a valve seat, a sealing ring and a valve cap, wherein the valve body is of a straight-through structure, the valve seat is in interference fit with an inner hole of the valve body, the valve body is pressed in, the outer circle of the sealing ring is conical, the sealing with the valve body can be guaranteed while the novel valve is convenient to install, the valve cap is in threaded connection with the valve body, an O-shaped ring is arranged in the middle of the novel valve cap to guarantee the sealing performance, and a plastic belt is arranged between the valve cap and the valve body. The utility model has the advantages that the counter bores are respectively arranged at the two ends of the sealing ring, so that the center thickness of the sealing ring is thinned, the pressure measuring probe of the testing equipment can be conveniently inserted and pulled out, the structure of the double-layer sealing ring is adopted, the sealing effect is enhanced, the service life is prolonged, even if one layer of the sealing ring is damaged, the other layer can still be sealed, and the pressure measuring nozzle can be normally used; a plastic belt is arranged between the valve body and the valve cap, two ends of the plastic belt are sleeved into the valve body and the valve cap respectively, and the valve cap can be prevented from being lost when the valve cap is unscrewed.
This patent uses second kind working method, has reduced pollution and potential safety hazard, and it is more to be suitable for the scene, but the sealing washer (the rubber column) of the straight-through structure that this patent set up, when pressure measurement probe just inserts, under the effect of power, round rubber around the counter bore can have the motion state to the indent, and the leakproofness at this moment can be influenced greatly to this kind of deformation of sealing washer, even set up two sealing washer superpositions, at this moment that pressure measurement probe inserted, the leakproofness of this pressure measurement mouth is still relatively poor.
The utility model aims at improving the pressure measurement joint that uses the second working method, solves prior art, and the pressure measurement joint uses the rubber column of direct structure, and rubber column deformation influences the problem of leakproofness when the pressure measurement probe inserts, provides a pressure measurement joint that the leakproofness is good, the pollution is few, the potential safety hazard is low, the range of application is wide.
Disclosure of Invention
Be provided with the cavity with the fluid intercommunication usually in the casing of pressure measurement joint, interference fit installs rubber column and spacing ring in the cavity, and the pressure measurement probe that need use the pressure measurement during the pressure measurement stretches into the cavity, punctures the rubber column, makes pressure measurement probe and fluid contact carry out the pressure measurement, extracts the pressure measurement probe after the pressure measurement finishes, and the hole that is stabbed on the rubber column is automatic to heal, maintains sealedly.
This is disclosed to using the rubber column of direct structure among the prior art, rubber column deformation and the problem that influences the leakproofness when the pressure measurement probe inserts provides a better pressure measurement joint of leakproofness and pressure measurement system, and simultaneously, this pressure measurement joint and pressure measurement system are small, pollute less, the potential safety hazard is low, the range of application is wide.
One of the concepts of the present disclosure is to change a rubber column from a straight-through rubber column to a rubber column with a conical surface at the head, and when a pressure measuring probe is inserted, the conical surface part will generate an outward extrusion force on the rubber below.
Another idea of the present disclosure is that, considering that the pressure probe is easy to slip when inserted into the rubber column from the conical surface, or the needle head is deformed due to uneven stress, the conical surface structure arranged at the head of the rubber column is improved into a circular truncated cone-shaped structure, that is, the head of the rubber column is provided with a circular horizontal plane, so that the pressure probe is not easy to slip when inserted from the horizontal plane, and the operation is more convenient.
Another design of this disclosure lies in, when taking place deformation, the rubber column leakproofness that is provided with the round platform structure is better than the rubber column of straight-through structure (being provided with heavy platform), only installs a rubber column in the cavity of this disclosure pressure measurement joint, compares and need set up two rubber columns among the prior art and just can realize sealing, this disclosure has reduced rubber column quantity under the condition of guaranteeing the leakproofness for the length of whole pressure measurement joint is shorter, and the volume is littleer, can reduce cost, is applicable to narrow environment.
Another idea of the present disclosure is that the rubber column is in interference fit with the housing, so the rubber column is not easily pressed into the cavity, and the top of the rubber column is set to be a conical surface or a circular truncated cone structure, which can solve the problem, so that the assembly is easier.
Another idea of the present disclosure is that a protrusion is provided on the bottom surface of the rubber column, so that the rubber column can be more conveniently fixed during assembly.
Another idea of the present disclosure is that, when only the cylindrical surface is used as the sealing end surface to bear high pressure, the problem of leakage caused by abrasion and deformation of the rubber column due to excessive sealing ratio pressure may occur, as an improvement, an inclined surface matched with the shape of the conical surface of the rubber column or the side surface of the circular truncated cone is arranged in the cavity of the pressure measuring joint, two surfaces are attached to each other when the rubber column is assembled, when the fluid pressure is large, the side surface of the conical surface or the circular truncated cone is also extruded with the housing, so that the area of the sealing end surface is increased, and the pressure measuring joint can bear a large range of pressure.
Another concept of the present disclosure is that the rubber post and the stop collar are interference fit and work reliably under shock and vibration loads.
Another concept of the present disclosure is that the retainer ring is provided with a chamfer so that the retainer ring can be more easily pressed into the cavity during assembly.
Another concept of the present disclosure is that the stop collar is substantially circular, and is divided into a first section and a second section, the first section is provided with a chamfer, the diameter of the first section is substantially equal to the diameter of the cavity, the diameter of the second section is greater than the diameter of the cavity, the first section provided with the chamfer is firstly put into the cavity during assembly, and then the second section is pressed into the cavity, so that the assembly is faster, and the assembly effect is better.
Further, another design of this disclosure lies in that, the surface of spacing ring second section is provided with the annular knurl, annular knurl and casing interference fit, and the assembly effect is better, and the spacing ring is difficult for rocking, droing, and the pressure measurement connects more durable.
The utility model provides a pair of pressure measuring joint, including casing, rubber column, spacing ring, end cover, wherein be provided with the cavity in the casing, the rubber column is installed in the cavity with the spacing ring, casing upper end and end cover threaded connection, the surface of casing lower extreme is equipped with the screw thread of being connected the usefulness with hydraulic system.
Further, the cavity includes cavity and cavity down, and the cavity has first aperture basically in the last cavity of cavity upper end, and the cavity has the second aperture basically in the lower cavity of cavity lower extreme, and rubber column and spacing ring are installed in the cavity down, and first aperture is less than the second aperture for upwards wash out the cavity under the high-pressure fluid effect after preventing the rubber column impaired deformation.
Furthermore, the rubber column and the limiting ring are assembled on the shell in an interference fit mode, the interference fit connection mode is adopted, the structure is simple, the coaxiality is good, large axial force can be borne, the rubber column and the limiting ring are firmly assembled at the fixed position of the shell, and good sealing performance can be kept under various unstable conditions such as low system pressure or vibration.
In some embodiments, the rubber column includes a basic cylindrical structure, a conical surface structure is arranged at the head of the rubber column, when the pressure measuring probe is inserted, the conical surface applies an outward force to the cylindrical surface of the rubber column, and the rubber column with a straight-through structure of the sinking platform is arranged, after the rubber column is stressed, the cylindrical surface is inwards concave. And when assembling the rubber column, firstly, the conical surface structure is pushed into the cavity, so that the assembly is easier.
Furthermore, considering that the pressure measuring probe is easy to slip when being inserted into the rubber column from the conical surface, or the needle head is deformed due to uneven stress, the conical surface structure of the head part of the rubber column is improved into a round table-shaped structure, so that the pressure measuring probe is not easy to slip when being inserted from the top surface of the round table, and the operation is more convenient.
In this disclosure, set up a rubber column and can have better leakproofness, compare the structure of two current rubber columns, can reduce the overall length and the weight that the pressure measurement connects, make the pressure measurement connect more portable light and handy, be suitable for the narrow and small environment department in space and use.
In some embodiments, the limiting ring is installed at the lower end of the shell and used for preventing accidents caused by fluid mixed after the rubber column falls off, and the limiting ring is installed at the port of the lower end of the shell and can reduce work consumed by assembly while ensuring the stability of the connecting structure.
Furthermore, the top of the limiting ring is provided with a chamfer, so that the assembly is facilitated.
Further, the spacing ring is basically in a circular ring shape, and is divided into a first section and a second section, and the first section is provided with a chamfer, the diameter of the first section is basically equal to the diameter of the cavity, and the diameter of the second section is larger than the diameter of the cavity.
Further, the surface of spacing ring second section is provided with the annular knurl, annular knurl and casing interference fit, and the assembly effect is better, and the spacing ring is difficult for rocking, droing, and the pressure measurement connects more durable.
In some embodiments, a gasket or a washer is disposed between the end cover and the port at the upper end of the housing, so that the entire cavity can be sealed, and the rubber column is prevented from being affected by external air, rainwater, dust and the like.
In some embodiments of the present disclosure, the end cover outer surface is provided with the knurling, the knurling is straight line knurling or reticulation knurling, and when the setting of knurling made rotatory end cover, the frictional force increase between hand and end cover more conveniently screwed up or unscrewed the end cover, and the person of facilitating the use operates.
Furthermore, a rubber belt is connected between the end cover and the shell, two ends of the rubber belt are respectively fixed on the end cover and the shell, and the end cover can be prevented from being lost when the end cover is unscrewed.
In some embodiments of the present disclosure, the rubber column is installed right above the limit ring, that is, the bottom surface of the rubber column contacts with the limit ring, and the rubber column is installed at this position, which can reduce the depth of the rubber column pressed into the cavity, and reduce the work required to be consumed during assembly.
In some embodiments of the present disclosure, the bottom surface of the rubber column is provided with a circular truncated cone-shaped protrusion, so that when the rubber column is pressed into the cavity, the rubber column can be better fixed on the pressing tool or the buffer object by means of the circular truncated cone-shaped protrusion.
In some embodiments of the disclosure, an inclined plane matched with the shape of the head conical surface of the rubber column is arranged between the upper cavity and the lower cavity, the rubber column is inserted into the cavity when being assembled, so that the head conical surface of the rubber column is attached to the inclined plane, when the fluid pressure is large, the head conical surface of the rubber column is extruded with the shell, the area of the sealing end surface is increased, the problems that the rubber column is abraded and deformed to cause leakage due to overlarge sealing ratio when the cylindrical surface is used as the sealing end surface to bear high pressure are solved, and the pressure measuring joint can bear pressure in a larger range.
The utility model provides a pair of pressure measurement system, including the manometer, the pressure measurement probe, with the pressure measurement connects, the manometer is connected on the pressure measurement probe, the pressure measurement probe includes compression leg, nut, needle tubing, sheath, spiral cover.
Further, the needle cannula is substantially a hollow cylinder with an interior, and one end of the needle cannula is provided with a needle hole for the passage of fluid. In order to avoid the rubber column from blocking the needle hole, the needle hole is arranged on the side surface of the needle tube.
Furthermore, one end of the needle tube is sleeved with a compression column, a nut is sleeved outside the compression column, and the nut is held by a pressure measuring probe, so that the operation is convenient.
Furthermore, a rotary cover is fixedly installed on the needle tube, a knurl is arranged outside the rotary cover, a thread is arranged inside the rotary cover, and an external thread adapted to the rotary cover is arranged on the protective sleeve. The sheath loading and unloading are convenient, are equipped with the annular knurl on the spiral cover, make things convenient for handheld.
Furthermore, the sheath is basically in a circular ring shape, wraps the needle tube, prevents the needle tube from being exposed outside, and plays a role in protecting the needle tube.
During pressure measurement, the end cover of the pressure measurement connector is opened, the sheath on the pressure measurement probe is taken down, the needle tube extends into the cavity of the pressure measurement connector, fluid can enter the needle tube from the needle hole after the needle tube penetrates through the rubber column, and it can be understood that the screw cap can be arranged on the shell of the pressure measurement connector and the sealing ring is arranged in the screw cap.
After the pressure measurement is finished, the screw cap is unscrewed, the needle tube is pulled out, the rubber column automatically heals, the end cover is screwed down, and the pressure measurement joint keeps the tightness.
Compared with the prior art, the pressure measuring joint provided by the disclosure has the advantages of small volume, light weight, good sealing property and the like. When the pressure measuring system comprising the pressure measuring joint is used for measuring pressure, fluid does not need to be led out to the upper cavity, and the pressure measuring joint is less in pollution, low in potential safety hazard, wide in application range and convenient to operate.
Drawings
The present disclosure will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the present disclosure. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.
FIG. 1: a front view of a pressure tap provided by the present disclosure;
FIG. 2: a top view of a pressure tap provided by the present disclosure;
FIG. 3: the cross-sectional view along the A-A direction of the pressure measuring joint provided by the present disclosure;
FIG. 4: the present disclosure provides an exploded view of a pressure tap;
FIG. 5: a front view of a pressure probe provided by the present disclosure;
FIG. 6: a top view of a pressure probe provided by the present disclosure;
FIG. 7: the cross section of a pressure measuring probe provided by the present disclosure in the B-B direction is schematic;
FIG. 8: the present disclosure provides an exploded view of a pressure probe;
wherein 01, a rubber belt; 02. an end cap; 03. a housing; 04. a rubber column; 05. a limiting ring; 06. a gasket; 031. an upper cavity; 032. a lower cavity; 11. pressing the column; 12. a nut; 13. a needle tube; 14. a sheath; 15. and (5) screwing a cover.
Detailed Description
The present disclosure is described in detail below with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present disclosure will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the disclosure and are not intended to limit the disclosure.
The first embodiment is as follows: the pressure measuring joint provided by the present disclosure, as shown in fig. 1-4, comprises a housing 03, a rubber column 04, a limiting ring 05, and an end cover 02, wherein a cavity is provided in the housing 03, the cavity comprises an upper cavity 031 and a lower cavity 032, the rubber column 04 and the limiting ring 05 are installed in the lower cavity 032, the upper end of the housing 03 is in threaded connection with the end cover 02, and a thread for connecting with a hydraulic system is provided on the outer surface of the lower end of the housing 03.
Further, last cavity 031 of cavity upper end has first aperture, and lower cavity 032 of cavity lower extreme has the second aperture, goes up cavity 031 and cavity 032 coaxial down, and first aperture is less than the second aperture for prevent that rubber column 04 from upwards dashing out the cavity under the high-pressure fluid effect after impaired deformation.
Further, the rubber column 04 is the butyronitrile rubber column 04, the rubber column 04 and the limit ring 05 are assembled on the shell 03 in an interference fit manner, and the interference fit connection mode is adopted, so that the rubber column 04 and the limit ring 05 are firmly assembled at the fixed position of the shell 03, and the rubber column 04 and the limit ring 05 can be kept in good sealing performance under various unstable conditions such as low system pressure or vibration.
It is understood that in other embodiments, different materials are used for the rubber column 04 to accommodate different fluid media.
Further, the head of the rubber column 04 is of a circular table-shaped structure, when a pressure measuring probe is inserted, the circular table can apply outward force to the cylindrical surface of the rubber column 04, the rubber column 04 of a straight-through structure of the sinking table is arranged, the cylindrical surface is inwards concave after being stressed, deformation of the rubber column 04 cannot generate negative influence on sealing performance when the pressure measuring probe is received, the shell 03 can be further extruded, sealing performance is better, and the circular table is pushed into the shell 03 first when the rubber column 04 is assembled, so that assembly is easier.
In this embodiment, set up a rubber column 04 and can have better leakproofness, compare two current rubber column 04's structure, can reduce the overall length and the weight of pressure measurement joint, make pressure measurement joint more portable light and handy, be suitable for the narrow and small environment department in space and use.
Furthermore, the limiting ring 05 is arranged at a port at the lower end of the shell 03, so that accidents caused by fluid mixed after the rubber column 04 falls off can be prevented, and work consumed by assembly can be reduced while the stability of the connecting structure is ensured.
Furthermore, a gasket 06 is arranged between the end cover 02 and the upper end port of the shell 03, so that the whole cavity can be sealed, and the influence of outside air, rainwater, dust and the like on the rubber column 04 is avoided.
In other embodiments, a gasket, such as an ed ring, is disposed between the end cap 02 and the upper end port of the housing 03.
Further, the spacing ring 05 is the ring form basically, and it divide into first section and second section, is provided with the chamfer in the first section, and the diameter of first section equals the diameter of cavity basically, and the surface of second section is provided with the annular knurl, annular knurl and casing 03 interference fit, and the first section that is equipped with the chamfer during the assembly is packed into the cavity earlier, and the cavity of impressing the second section again, and the assembly is quicker, annular knurl and casing 03 interference fit, and the assembly effect is better, and the spacing ring 05 is difficult for rocking, droing, and the pressure measurement connects more durable.
Furthermore, the knurling is reticulate knurling, and can be better locked.
In other embodiments, the outer surface of the stop collar 05 is provided with straight knurls or other knurls.
The outer surface of the end cover 02 is provided with the reticulate pattern knurls, the end cover is small in size, when the end cover 02 is rotated due to the arrangement of the knurls, friction between a hand and the end cover 02 is increased, the end cover 02 can be screwed down or unscrewed more conveniently, and operation of a user is facilitated.
In other embodiments, the knurls are straight knurls or other knurls.
Furthermore, a rubber belt 01 is connected between the end cover 02 and the shell 03, two ends of the rubber belt 01 are fixed on the end cover 02 and the shell 03 respectively, the end cover 02 can be prevented from being lost when the end cover 02 is unscrewed, the rubber belt 01 is soft in material and not prone to scratching a human body.
Further, the rubber column 04 is installed right above the limiting ring 05, namely, the bottom surface of the rubber column 04 is in contact with the limiting ring 05, and the rubber column 04 is installed at the position, so that the depth of the rubber column 04 pressed into the cavity can be reduced, and work consumed during assembly is reduced.
Further, the bottom surface of the rubber column 04 is provided with a circular truncated cone-shaped bulge, so that when the rubber column 04 is pressed into the cavity, the rubber column 04 can be better fixed on a pressing tool or a buffer object by means of the circular truncated cone-shaped bulge.
When carrying out the pressure measurement, use the pressure measurement probe to insert and puncture rubber column 04, the pressure measurement is carried out in the pressure measurement probe directly probes into the fluid that awaits measuring, and the back is extracted to the pressure measurement probe, because the material characteristic of rubber itself, the hole automatic healing who stabs out, this mode is compared in the measuring method that needs with the fluid leading-in to rubber column 04 top, pollutes less, the potential safety hazard is low, range of application is wider.
Example two: the main difference between this embodiment and the first embodiment lies in that the mounting position of the rubber column 04 in the lower cavity 032 is different, in this embodiment, the depth of pressing the rubber column 04 into the housing 03 during assembly is larger, and an inclined plane matching with the inclined plane of the circular truncated cone structure at the head of the rubber column 04 is provided between the upper cavity 031 and the lower cavity 032, when the rubber column 04 is assembled, the inclined plane of the rubber column 04 is attached to the inclined plane on the housing 03, when the fluid pressure is larger, the inclined plane of the rubber column 04 is also extruded with the housing 03, the area of the sealing end surface is increased, and the problem that the rubber column 04 is worn and deformed to cause leakage due to excessive sealing ratio pressure when only the cylindrical surface is used as the sealing end surface to bear high pressure is solved, so that the pressure measuring joint of this embodiment can bear larger pressure compared with the first embodiment.
Example three: the embodiment is a pressure measuring system, which comprises a pressure gauge, a pressure measuring probe and the pressure measuring joint, wherein the pressure gauge is connected to the pressure measuring probe, and the pressure measuring probe has a structure shown in fig. 5-8 and comprises a pressure column 11, a screw cap 12, a needle tube 13, a sheath 14 and a screw cap 15.
Further, the needle tube 13 is a substantially hollow cylindrical body, and one end of the needle tube 13 is provided with a needle hole for passing a fluid. In order to avoid the rubber column 04 blocking the needle hole, the needle hole is arranged at the side of the needle tube 13.
Furthermore, one end of the needle tube 13 is sleeved with a pressure column 11, a screw cap 12 is sleeved outside the pressure column 11, and the screw cap 12 is held by a pressure measuring probe, so that the operation is convenient.
Further, a screw cap 15 is fixedly mounted on the needle tube 13, a knurl is arranged outside the screw cap 15, a thread is arranged inside the screw cap, and an external thread adapted to the screw cap 15 is arranged on the sheath 14. The sheath 14 is convenient to assemble and disassemble, and the knurls are arranged on the screw cap 15, so that the hand-held device is convenient to hold.
Further, the sheath 14 is substantially circular, and covers the needle tube 13 to prevent the needle tube 13 from being exposed, thereby protecting the needle tube 13.
During pressure measurement, the end cover 02 of the pressure measurement connector is opened, the sheath 14 on the pressure measurement probe is taken down, the needle tube 13 extends into the cavity of the pressure measurement connector, after the needle tube 13 passes through the rubber column 04, fluid can enter the needle tube 13 from the needle hole, and it can be understood that the screw cap 15 can be arranged on the shell of the pressure measurement connector, and a sealing ring is arranged in the screw cap 15.
After the pressure measurement is finished, the screw cap 15 is unscrewed, the needle tube 13 is pulled out, the rubber column 04 is automatically healed, the end cover 02 is screwed down, and the pressure measurement joint keeps the tightness.
Compared with the prior art, the pressure measuring joint provided by the disclosure has the advantages of small volume, light weight, good sealing property and the like. When the pressure measuring system comprising the pressure measuring joint is used for measuring pressure, fluid does not need to be led out to the upper cavity, and the pressure measuring joint is less in pollution, low in potential safety hazard, wide in application range and convenient to operate.
The present disclosure has been described in detail above, and the principles and embodiments of the present disclosure have been explained herein using specific examples, which are provided only to assist understanding of the present disclosure and the core concepts. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present disclosure without departing from the principle of the present disclosure, and such improvements and modifications also fall within the scope of the claims of the present disclosure.
Claims (9)
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| CN202110942084.0A CN113776726B (en) | 2021-08-17 | 2021-08-17 | A pressure measuring joint and pressure measuring system |
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| CN202110942084.0A CN113776726B (en) | 2021-08-17 | 2021-08-17 | A pressure measuring joint and pressure measuring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120593955A (en) * | 2025-08-08 | 2025-09-05 | 常州同敏机械科技有限公司 | A sealed pressure measuring joint |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113776726B (en) | 2023-11-24 |
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Effective date of registration: 20241021 Address after: 1-2-189, Building 2, Huitou Village Industrial Zone, Qiuai Town, Yinzhou District, Ningbo City, Zhejiang Province 315000 Patentee after: Ningbo Keming Instrument Co.,Ltd. Country or region after: China Address before: No. 647, Wuxiang North Road, Wuxiang Township, Yinzhou District, Ningbo City, Zhejiang Province Patentee before: Ningbo Xuri temperature and pressure instrument Co.,Ltd. Country or region before: China |
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