CN210398050U - Piston pressure measuring joint - Google Patents
Piston pressure measuring joint Download PDFInfo
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- CN210398050U CN210398050U CN201921422819.1U CN201921422819U CN210398050U CN 210398050 U CN210398050 U CN 210398050U CN 201921422819 U CN201921422819 U CN 201921422819U CN 210398050 U CN210398050 U CN 210398050U
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- valve core
- hole
- shaped ring
- piston rod
- joint body
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Abstract
The utility model relates to a piston pressure measuring joint for sampling of a low-pressure fluid system and system pressure detection, which comprises a joint body, a valve core and a piston rod, wherein the center of the joint body is a step hole which is communicated up and down, and the upper end of the joint body and the lower end of the joint body are both provided with external threads; the center of the valve core is a step hole which is communicated up and down, the valve core is inserted into the step hole of the connector body from the inlet of the step hole at the top of the connector body, a cylindrical rod at the top of the piston rod is inserted into the step hole at the bottom of the valve core, an annular groove is arranged on the piston rod, and an O-shaped ring is connected in the annular groove; the lower end of the piston rod is fixedly connected with a spring, the bottom of the spring is abutted against the bottom plane of the stepped hole in the joint body, and the spring is in a compressed state; an O-shaped ring is placed at the hole bottom of the stepped hole at the top of the valve core, and a check ring which is abutted against the O-shaped ring is arranged above the O-shaped ring. The utility model discloses utilize piston rod sealing washer and the spacing contact cooperation of sealed conical surface to form double seal under the thrust of spring, reach the sealed effect of pressure measurement joint.
Description
Technical Field
The utility model relates to a hydraulic pressure spare part, especially a piston pressure measurement connects that is used for the sample of low pressure fluid system and system pressure to detect.
Background
At present, sampling and pressure detection are needed in a hydraulic system, the process can be completed by connecting a pressure measuring joint with a measuring hose or a measuring joint with a thimble, a self-sealing valve is arranged in the pressure measuring joint, and the sampling and the pressure detection can be completed by only jacking up the self-sealing valve in the using process. The basic sealing forms of the existing pressure measuring joints in the market are steel ball sealing, hard contact sealing, tetrafluoroethylene and the like, the processing difficulty is high, the sealing surface requirement is high, the leakage is easy to achieve due to the limitation of sealing materials and the influence of spring force during low-pressure work, and the pressure agility during low-pressure work is not enough.
Disclosure of Invention
The utility model aims to solve the technical problem that a piston pressure measurement connects that the leakproofness is good and sensitivity is high when low pressure during operation is provided.
In order to solve the technical problem, the utility model discloses a realize through following mode: the piston type pressure measuring joint comprises a joint body, a valve core and a piston rod, wherein the center of the joint body is a step hole which is communicated up and down, and the upper end of the joint body and the lower end of the joint body are both provided with external threads; the center of the valve core is provided with a step hole which is communicated up and down, the valve core is inserted into the step hole of the joint body from the inlet of the step hole at the top of the joint body, the valve core and the joint body are sealed, and the valve core and the joint body are detachably and fixedly connected; the cylindrical rod at the top of the piston rod is inserted into the stepped hole at the bottom of the valve core, a sealing conical surface is arranged in the stepped hole at the bottom of the valve core, a conical surface is arranged below the cylindrical rod on the piston rod, and the conical surface and the sealing conical surface form sealing connection; the piston rod is provided with an annular groove, an O-shaped ring is connected in the annular groove, and the O-shaped ring is in sealing connection with a step hole at the bottom of the valve core; the lower end of the piston rod is fixedly connected with a spring, the bottom of the spring is abutted against the bottom plane of the stepped hole in the connector body, and the spring is in a compressed state; an O-shaped ring is placed at the hole bottom of the stepped hole in the top of the valve core, a retainer ring abutted against the O-shaped ring is arranged above the O-shaped ring, and the retainer ring is fixedly connected with the stepped hole in the top of the valve core.
The diameter of the top step hole in the connector body is the largest, and the diameters of the downward step holes gradually decrease.
An O-shaped ring is placed on the hole bottom plane of the stepped hole in the top of the connector body, a cylinder at the bottom of the valve core penetrates through the O-shaped ring, a cylindrical stepped shaft at the upper end of the valve core is pressed on the O-shaped ring, and the outer cylindrical surface of the valve core is sealed with the inner wall of the stepped hole of the connector body by the O-shaped ring; an internal thread is arranged on the inner wall of the step hole below the step hole at the top in the connector body, an external thread is arranged on the cylinder at the bottom of the valve core, and the internal thread and the external thread form detachable fixed connection.
An upright post is arranged below the piston rod, and a central hole of the spring is sleeved and fixed on the upright post.
And an open guide conical surface is arranged at the position edge of the hole opening of the stepped hole at the bottom of the valve core.
The upper end of the joint body is detachably connected with the nut internal thread of the dustproof nut assembly through the external thread; and a plug is arranged in the center of the nut of the dustproof nut assembly, and the end part of the plug can be inserted into the central hole of the O-shaped ring and the check ring in the valve core to play a role in sealing.
The upper end of the joint body is connected with a measuring hose or a measuring joint with a thimble through an external thread, the thimble of the measuring hose or the measuring joint presses down the piston rod, the conical surface of the piston rod leaves the sealing conical surface of the valve core, the O-shaped ring on the piston rod leaves the stepped hole at the bottom of the valve core, and a channel between the joint body and the center of the valve core is opened; the outer circumferential surface of the thimble is in sealing connection with the O-shaped ring.
The connector body presses down the ED ring, and forms a seal at the oil port through the ED ring.
The detachable fixedly connected with plastics dustproof cap of joint body lower extreme, the bottom edge of plastics dustproof cap compresses tightly on the ED circles.
The orifices of the stepped hole described in the technical scheme are all inlet ends for placing the valve core, the check ring, the O-shaped ring, the piston rod, the spring and the like into the stepped hole, and the bottom of the stepped hole is the hole bottom step position where the stepped hole plays an axial limiting role in the O-shaped ring, the spring and the like.
The utility model discloses an actively the effect: a piston pressure measurement connects and utilizes piston rod sealing washer and the spacing contact cooperation of sealed conical surface to form double seal under the thrust of spring, reaches the sealed effect of pressure measurement joint. When the pressure measuring connector works at a low pressure below 35Mpa, the O-shaped ring on the piston rod is more quick in sealing performance, high in sensitivity and longer in service life, and the pressure measuring connector with the structure is very suitable for sampling of a low-pressure fluid system and pressure detection of the system.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of the connection structure of the dust nut assembly.
In the figure, 1, a valve core 2, an O-shaped ring a 3, a connector body 4, an O-shaped ring b 5, an ED ring 6, a retainer ring 7, an O-shaped ring c8, an O-shaped ring d 9, a piston rod 10, a spring 11 and a dust-proof nut assembly.
Detailed Description
As shown in fig. 1 and 2, as a specific embodiment, the piston type pressure measuring joint of the present invention includes a joint body 3, a valve core 1 and a piston rod 9, wherein the center of the joint body 3 is a step hole penetrating from top to bottom, and the upper end of the joint body 3 and the lower end of the joint body 3 are both provided with external threads; the center of the valve core 1 is provided with a step hole which is communicated up and down, the valve core 1 is inserted into the step hole of the joint body 3 from the inlet of the step hole at the top of the joint body 3, the valve core 1 and the joint body 3 are sealed, and the valve core 1 and the joint body 3 are detachably and fixedly connected; the cylindrical rod at the top of the piston rod 9 is inserted into the step hole at the bottom of the valve core 1, a sealing conical surface is arranged in the step hole at the bottom of the valve core 1, a conical surface is arranged below the cylindrical rod on the piston rod 9, and the conical surface and the sealing conical surface form sealing connection; an annular groove is formed in the piston rod 9, an O-shaped ring d8 is connected in the annular groove, and the O-shaped ring d8 is in sealing connection with a step hole in the bottom of the valve core 1; the lower end of the piston rod 9 is fixedly connected with a spring 10, the bottom of the spring 10 is abutted against the bottom plane of a step hole in the joint body 3, the spring 10 is in a compressed state, the upward elastic force of the spring forces the O-shaped ring d8 to form sealing with the step hole at the bottom of the valve core 1, and simultaneously forces the sealing conical surface at the bottom of the valve core 1 to be sealed with the conical surface on the piston rod 9; an O-shaped ring a2 is placed at the hole bottom of the step hole at the top of the valve core 1, a retainer ring 6 abutted against the O-shaped ring a2 is arranged above the O-shaped ring a, and the retainer ring 6 is fixedly connected with the step hole at the top of the valve core 1.
The diameter of the top stepped hole in the joint body 3 is the largest, and the diameters of the downward stepped holes in sequence are gradually reduced.
An O-shaped ring c7 is placed on the bottom plane of the stepped hole at the top of the connector body 3, the cylinder at the bottom of the valve core 1 penetrates through the O-shaped ring c7, the cylindrical stepped shaft at the upper end of the valve core 1 is pressed on the O-shaped ring c7, and the outer cylindrical surface of the valve core 1 is sealed with the inner wall of the stepped hole of the connector body 3 by the O-shaped ring c 7; be located the step hole inner wall of the step hole below at the top in the connector body 3 and be provided with the internal thread, be provided with the external screw thread on the 1 bottom cylinder of case, internal thread and external screw thread constitute detachable fixed connection.
An upright post is arranged below the piston rod 9, and a central hole of the spring 10 is sleeved and fixed on the upright post.
And an open guide conical surface is arranged at the position edge of the orifice of the stepped hole at the bottom of the valve core 1.
The upper end of the joint body 3 is detachably connected with the nut internal thread of the dustproof nut assembly 11 through external threads; and a plug is arranged in the center of the nut of the dustproof nut assembly 11, and the end part of the plug can be inserted into the central holes of the O-shaped ring a2 and the check ring 6 in the valve core 1 to play a role in sealing.
The upper end of the connector body 3 is connected with a measuring hose or a measuring connector with a thimble through an external thread, the thimble of the measuring hose or the measuring connector presses the piston rod 9 downwards, the conical surface of the piston rod 9 leaves the sealing conical surface of the valve core 1, an O-shaped ring d8 on the piston rod 9 leaves a stepped hole at the bottom of the valve core 1, and a channel between the connector body 3 and the center of the valve core 1 is opened; the outer circumferential surface of the thimble is in sealing connection with the O-shaped ring.
The external screw thread bottom of the 3 lower extremes of joint body is provided with ED circle 5, and the external screw thread that connects the body 3 through the lower extreme links to each other with the oil port department internal thread of measurand pipeline, and joint body 3 pushes down ED circle 5, forms sealedly in oil port department through ED circle 5.
Connect 3 lower extreme detachable fixedly connected with plastics dustproof caps of the body, the bottom edge of plastics dustproof cap compresses tightly on ED circle 5, seals joint body lower extreme, conveniently preserves or transports.
The utility model discloses a working process is:
in the piston type pressure measuring joint, in the using process, the joint body is connected with the internal thread at the oil port of a measured pipeline through the external thread at the lower end, the joint body presses the ED ring downwards, and the seal is formed at the oil port through the ED ring; the upper end of the connector body is connected with a measuring hose or a measuring connector with a thimble through an external thread, the thimble of the measuring hose or the measuring connector presses down the piston rod, the conical surface of the piston rod leaves the sealing conical surface of the valve core, the O-shaped ring on the piston rod leaves the step hole at the bottom of the valve core, and the channel at the center of the connector body is opened and is used for sampling of a low-pressure fluid system and detecting the system pressure.
The above is only for illustrating some functional structure principles of a piston pressure measuring joint related to the present invention, and since it is easy for those skilled in the same technical field to perform a plurality of modifications on this basis, this specification does not intend to limit the present invention to a piston pressure measuring joint in the specific mechanism and application range shown or described, so all corresponding modifications and equivalents that may be utilized belong to the protection scope of the present invention.
Claims (9)
1. A piston pressure measuring connector is characterized in that: the connector comprises a connector body, a valve core and a piston rod, wherein a step hole which is communicated up and down is formed in the center of the connector body, and external threads are arranged at the upper end of the connector body and the lower end of the connector body; the center of the valve core is provided with a step hole which is communicated up and down, the valve core is inserted into the step hole of the joint body from the inlet of the step hole at the top of the joint body, the valve core and the joint body are sealed, and the valve core and the joint body are detachably and fixedly connected; the cylindrical rod at the top of the piston rod is inserted into the stepped hole at the bottom of the valve core, a sealing conical surface is arranged in the stepped hole at the bottom of the valve core, a conical surface is arranged below the cylindrical rod on the piston rod, and the conical surface and the sealing conical surface form sealing connection; the piston rod is provided with an annular groove, an O-shaped ring is connected in the annular groove, and the O-shaped ring is in sealing connection with a step hole at the bottom of the valve core; the lower end of the piston rod is fixedly connected with a spring, the bottom of the spring is abutted against the bottom plane of the stepped hole in the connector body, and the spring is in a compressed state; an O-shaped ring is placed at the hole bottom of the stepped hole in the top of the valve core, a retainer ring abutted against the O-shaped ring is arranged above the O-shaped ring, and the retainer ring is fixedly connected with the stepped hole in the top of the valve core.
2. A piston pressure tap as claimed in claim 1, wherein: the diameter of the top step hole in the connector body is the largest, and the diameters of the downward step holes gradually decrease.
3. A piston pressure tap as claimed in claim 1, wherein: an O-shaped ring is placed on the hole bottom plane of the stepped hole in the top of the connector body, a cylinder at the bottom of the valve core penetrates through the O-shaped ring, a cylindrical stepped shaft at the upper end of the valve core is pressed on the O-shaped ring, and the outer cylindrical surface of the valve core is sealed with the inner wall of the stepped hole of the connector body by the O-shaped ring; an internal thread is arranged on the inner wall of the step hole below the step hole at the top in the connector body, an external thread is arranged on the cylinder at the bottom of the valve core, and the internal thread and the external thread form detachable fixed connection.
4. A piston pressure tap as claimed in claim 1, wherein: an upright post is arranged below the piston rod, and a central hole of the spring is sleeved and fixed on the upright post.
5. A piston pressure tap as claimed in claim 1, wherein: and an open guide conical surface is arranged at the position edge of the hole opening of the stepped hole at the bottom of the valve core.
6. A piston pressure tap according to any one of claims 1 to 5, wherein: the upper end of the joint body is detachably connected with the nut internal thread of the dustproof nut assembly through the external thread; and a plug is arranged in the center of the nut of the dustproof nut assembly, and the end part of the plug can be inserted into the central hole of the O-shaped ring and the check ring in the valve core to play a role in sealing.
7. A piston pressure tap according to any one of claims 1 to 5, wherein: the upper end of the joint body is connected with a measuring hose or a measuring joint with a thimble through an external thread, the thimble of the measuring hose or the measuring joint presses down the piston rod, the conical surface of the piston rod leaves the sealing conical surface of the valve core, the O-shaped ring on the piston rod leaves the stepped hole at the bottom of the valve core, and a channel between the joint body and the center of the valve core is opened; the outer circumferential surface of the thimble is in sealing connection with the O-shaped ring.
8. A piston pressure tap according to any one of claims 1 to 5, wherein: the connector body presses down the ED ring, and forms a seal at the oil port through the ED ring.
9. A piston pressure tap as claimed in claim 8, wherein: the detachable fixedly connected with plastics dustproof cap of joint body lower extreme, the bottom edge of plastics dustproof cap compresses tightly on the ED circles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921422819.1U CN210398050U (en) | 2019-08-29 | 2019-08-29 | Piston pressure measuring joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921422819.1U CN210398050U (en) | 2019-08-29 | 2019-08-29 | Piston pressure measuring joint |
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| Publication Number | Publication Date |
|---|---|
| CN210398050U true CN210398050U (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921422819.1U Active CN210398050U (en) | 2019-08-29 | 2019-08-29 | Piston pressure measuring joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210398050U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111643699A (en) * | 2020-06-11 | 2020-09-11 | 赵善冬 | Hospital uses multi-functional public health sterilizer |
| CN113137202A (en) * | 2021-05-13 | 2021-07-20 | 穆洪升 | Single-pipe wellhead flow device |
| WO2022142502A1 (en) * | 2021-01-04 | 2022-07-07 | 伟鑫(广州)工业科技有限公司 | Anti-collision self-closing valve |
-
2019
- 2019-08-29 CN CN201921422819.1U patent/CN210398050U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111643699A (en) * | 2020-06-11 | 2020-09-11 | 赵善冬 | Hospital uses multi-functional public health sterilizer |
| WO2022142502A1 (en) * | 2021-01-04 | 2022-07-07 | 伟鑫(广州)工业科技有限公司 | Anti-collision self-closing valve |
| CN113137202A (en) * | 2021-05-13 | 2021-07-20 | 穆洪升 | Single-pipe wellhead flow device |
| CN113137202B (en) * | 2021-05-13 | 2022-04-19 | 大庆市万物石油机械制造有限公司 | Single-pipe wellhead flow device |
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