CN215832916U - Pressure measuring joint and pressure measuring system - Google Patents

Abstract

The utility model provides a pressure measurement connects and pressure measurement system belongs to pipeline valve technical field, including casing, rubber column, spacing ring, end cover, wherein be provided with the cavity in the casing, rubber column, spacing ring are installed in the cavity, and the spacing ring 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 basically the diameter of cavity, the surface of second section are provided with the annular knurl, annular knurl and casing interference fit. The pressure measuring system comprises a pressure measuring joint and a pressure measuring probe, wherein the pressure measuring probe comprises a pressure column, a screw cap, a needle tube, a sheath, a screw cap and the like. The pressure measuring joint and the pressure measuring system limiting ring are firm to mount, durable and low in potential safety hazard.

Description

Pressure measuring joint and pressure measuring system

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.

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. In this publication, the valve seat is interference fit with the valve body hole, and the valve seat is used for preventing the valve body from getting into the fluid, but in actual use, the valve seat is usually not firm enough, and when the pressure measurement probe application of force was too big, valve seat and valve body probably fall into the fluid together, produced the influence to hydraulic system's work.

In the prior art, a valve seat, namely a limiting ring, in a pressure measuring joint is not firmly assembled, so that the service life of the pressure measuring joint is influenced, and even the working of a hydraulic system is influenced after the pressure measuring joint falls into fluid.

SUMMERY OF THE UTILITY MODEL

The pressure tap housing is typically provided with a cavity in fluid communication with the pressure tap housing, and the cavity is fitted with a rubber post and a stop collar.

This is disclosed to among the prior art spacing ring assembly firm inadequately, influences the life of pressure measurement joint, even fall into the problem that can produce the influence to hydraulic system's work behind the fluid, provides a pressure measurement joint and pressure measurement system that spacing ring assembly effect is better, and this pressure measurement joint and pressure measurement system's spacing ring assembly is firm, and is more durable to can not fall into the fluid, reduced the potential safety hazard.

One of the concepts of the present disclosure is that the rubber post and the stop collar are both mounted in the housing cavity by interference fit, and operate 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.

Another idea of the present disclosure is to change a rubber column from a rubber column having a through structure to a rubber column having a circular truncated cone-shaped structure at the head, where the circular truncated cone portion generates an outward pressing force on the rubber below when the pressure measurement probe is inserted, and compared with the traditional concave rubber column, the outward deformation can increase the pressing force between the cylindrical surface of the rubber column and the housing, thereby increasing the sealing effect.

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.

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.

In some embodiments, the rubber column and the limiting ring are assembled on the shell in an interference fit manner, and the interference fit connection mode is adopted, so that the rubber column and the limiting ring are simple in structure and good in coaxiality, can bear large axial force, are firmly assembled at the fixed position of the shell, and can keep good sealing performance under various unstable conditions such as low system pressure or vibration.

In some embodiments, the top of the limiting ring is provided with a chamfer to facilitate assembly.

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.

Furthermore, the spacing ring is arranged at the lower end of the shell and used for preventing accidents caused by fluid mixed after the rubber column falls off, and the spacing ring is arranged at the port of the lower end of the shell and can reduce work required by assembly while ensuring the stability of the connecting structure.

In some embodiments, the rubber column includes a basic cylindrical structure and a circular truncated cone-shaped structure arranged on the top of the cylindrical structure, when the pressure measuring probe is inserted, the circular truncated cone can apply an outward force to the cylindrical surface of the rubber column, and the rubber column provided with the straight-through structure of the sunken platform in the prior art is stressed so that 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.

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.

Furthermore, a gasket or a gasket is arranged between the end cover and the port at the upper end of the shell, the whole cavity can be sealed, the influence of external air, rainwater, dust and the like on the rubber column is avoided, in addition, when the rubber column is leaked, due to the sealing effect of the end cover, the gasket and the gasket, the fluid cannot overflow, and the pressure intensity of the fluid can be maintained stably.

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 matching 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, and when the fluid pressure is higher, the head conical surface of the rubber column is extruded with the shell to form a seal and can bear higher pressure.

The utility model provides a pressure measurement system, including pressure measurement probe, the manometer, with the pressure measurement connects, the manometer with pressure measurement probe connects, 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 durability, 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 also provided with the reticulate pattern knurls, and when the end cover 02 is rotated due to the arrangement of the knurls, the friction force between the hand and the end cover 02 is increased, so that the end cover 02 can be screwed down or unscrewed more conveniently, and the 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 respectively fixed on the end cover 02 and the shell 03, the end cover 02 can be prevented from being lost when the end cover 02 is unscrewed, and the rubber belt 01 is soft and not easy to scratch 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.

In other embodiments, the rubber column may be sealed in other ways, for example, the rubber column may slide in the cavity, and the rubber column may be provided with an inclined surface, and sealing may be accomplished only by the inclined surface and a corresponding inclined surface in the cavity.

Example three: the embodiment is a pressure measuring system, which comprises the pressure measuring joint, a pressure measuring probe and a pressure gauge, wherein the pressure measuring probe is connected with the pressure gauge, and the pressure measuring probe has a structure as 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 durability, good sealing performance and the like. When the pressure measuring system comprising the pressure measuring joint is used for measuring pressure, the situation that the limiting ring falls off is not needed to be worried about, and potential safety hazards are lower.

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)

1. A pressure measuring connector is characterized in that: the pressure tap includes:

the hydraulic pump comprises a shell, wherein a cavity is axially arranged in the shell and comprises an upper cavity and a lower cavity, and threads for connecting a hydraulic system are arranged on the outer surface of the lower end of the shell;

the rubber column is arranged in the lower cavity and used for sealing;

the limiting ring is arranged in the lower cavity and is arranged below the rubber column and used for preventing the rubber column from entering a pipeline of a hydraulic system;

the end cover is in threaded connection with the shell;

the limiting ring is basically in a circular ring shape and is divided into a first section and a second section, a chamfer is arranged on the first section, the diameter of the first section is basically equal to that of the cavity, a knurling is arranged on the outer surface of the second section, and the knurling is in interference fit with the shell.

2. A pressure tap according to claim 1 wherein: the rubber column is in interference fit with the cavity of the shell.

3. A pressure tap according to claim 1 wherein: the head of the rubber column is provided with a round platform-shaped structure.

4. A pressure tap according to claim 3 wherein: the shell is provided with an inclined plane matched with the round platform structure of the rubber column, and the side surface of the round platform arranged on the rubber column is attached to the inclined plane on the shell.

5. A pressure tap according to claim 1 wherein: a gasket or a washer is arranged in the end cover, and a rubber belt is connected between the end cover and the shell.

6. A pressure measurement system is characterized in that: the pressure measuring joint comprises the pressure measuring joint of any one of claims 1 to 5, a pressure measuring probe and a pressure gauge, wherein the pressure measuring probe comprises a pressure column, a screw cap, a needle tube, a sheath and a screw cap, the pressure column and the screw cap are arranged at one end of the needle tube and used for holding by hand, the screw cap is fixedly arranged on the needle tube, the sheath is in threaded connection with the screw cap and used for protecting the needle tube, and the pressure measuring probe is connected with the pressure gauge.

7. A pressure measurement system according to claim 6, wherein: and a gasket is arranged in the screw cap.

8. A pressure measurement system according to claim 6, wherein: the screw cap can be mounted on the housing of the pressure measuring connection.

9. A pressure measurement system according to claim 6, wherein: the needle tube is a cylinder with a hollow inner part, and the side surface of the needle tube is provided with a needle hole for fluid to pass through.

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