CN107727316B - Sealing performance detection device for fixed ball valve - Google Patents
Sealing performance detection device for fixed ball valve Download PDFInfo
- Publication number
- CN107727316B CN107727316B CN201711018659.XA CN201711018659A CN107727316B CN 107727316 B CN107727316 B CN 107727316B CN 201711018659 A CN201711018659 A CN 201711018659A CN 107727316 B CN107727316 B CN 107727316B
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- valve seat
- wall
- sealing
- ring
- shell
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
- G01M3/08—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds
- G01M3/086—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds for valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
- G01M3/14—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/144—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Taps Or Cocks (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Fixed ball valve sealing performance detection device. The detection device mainly solves the problem that the existing detection device cannot determine whether leakage occurs between a valve seat and a ball body or a sealing ring on the valve seat. The invention provides a device for detecting the sealing performance of a fixed ball valve, which can detect whether a valve, in particular a valve seat and a ball body, is leaked or a sealing ring is leaked, has a simple structure, is preferable, is also provided with an adjusting device, and can test the sealing capability of the sealing ring under different pressures.
Description
Technical Field
The invention relates to the field of ball valves, in particular to a device for detecting sealing performance of a fixed ball valve.
Background
Along with the rapid development of national economy, the demands of various industries on valves are increased, the demands on performance are improved, in addition, the valve outlets are increased, and the demands of other countries on the Chinese valves are increased. In particular, there is a great deal of demand for ball valves, including conventional ball valves, ultra-low temperature ball valves, high temperature hard seal ball valves, high polymer material sealed anti-corrosion ball valves, etc., and the demand is very high, and the conventional ball valves, the high polymer material anti-corrosion ball valves must leak in zero leakage, and the ultra-low temperature ball valves, the high temperature hard seal ball valves are required to be close to zero leakage, even zero leakage. Therefore, how to seal each sealing part inside the valve is very important to ensure the performance of the valve because the accurate control of the leakage amount is improved when leakage occurs.
The conventional method is to directly test the actual product, and when leakage occurs, the sealing element material, the compression amount, the part precision and the like are continuously changed, and the sealing element is tested and compared for a plurality of times, so that the method is very wasteful of energy and material resources, wastes time and cannot accurately master the leakage reason.
However, current detection devices cannot determine whether in particular a leak between the valve seat and the ball or a leak in the sealing ring on the valve seat occurs.
Disclosure of Invention
In order to overcome the defects of the background technology, the invention provides a device for detecting the sealing performance of a fixed ball valve, which mainly solves the problem that the existing detection device cannot determine whether leakage occurs between a valve seat and a ball body or a sealing ring on the valve seat.
The technical scheme adopted by the invention is as follows:
the fixed ball valve sealing performance detection device comprises a shell, wherein the shell comprises a left body, a right body and a chassis;
the outer wall of one end of the left body is provided with a pressure inlet, the left body is axially provided with a first mounting groove, the circumferential inner wall of the first mounting groove is provided with a first valve seat in sealing fit, a first sealing assembly is further arranged between the circumferential outer wall of the first valve seat and the inner wall of the mounting groove, a first detection channel is arranged on the shell corresponding to the first sealing assembly, a first gap is arranged between the axial direction of the first valve seat and the axial direction of the first mounting groove, the first valve seat comprises a flow channel, and the flow channel is communicated with the pressure inlet;
the right body is axially provided with a second mounting groove, the circumferential inner wall of the second mounting groove is provided with a second valve seat in sealing fit, a second sealing assembly is further arranged between the circumferential outer wall of the second valve seat and the inner wall of the second mounting groove, a second detection channel is arranged on the shell corresponding to the second sealing assembly, and a second gap is arranged between the axial direction of the second valve seat and the axial direction of the second mounting groove;
the rotary type ball valve is characterized in that a ball body is rotatably arranged on the chassis, the first valve seat and the second valve seat are correspondingly arranged on two sides of the ball body, a middle cavity is formed between the inner wall of the top of the shell and the ball body, and a third detection channel communicated with the middle cavity is arranged on the shell.
The beneficial effects of the invention are as follows: the invention provides a device for detecting the sealing performance of a fixed ball valve, which can detect whether a valve, in particular a valve seat and a ball body, is leaked or a sealing ring is leaked, has a simple structure, is preferable, is also provided with an adjusting device, and can test the sealing capability of the sealing ring under different pressures.
Drawings
FIG. 1 is a schematic cross-sectional view of one embodiment of the present invention.
Fig. 2 is a schematic partial cross-sectional view of another embodiment of the present invention.
Fig. 3 is an enlarged schematic view at a in fig. 1.
Fig. 4 is an enlarged schematic view at B in fig. 1.
Detailed Description
The invention is further described below with reference to the accompanying drawings: as shown in the figure, the fixed ball valve sealing performance detection device comprises a shell 1, wherein the shell comprises a left body 2, a right body 3 and a chassis 4; the outer wall of one end of the left body is provided with a pressure inlet 21, the left body is axially provided with a first mounting groove 22, the circumferential inner wall of the first mounting groove is provided with a first valve seat 91 in sealing fit, a first sealing component 92 is further arranged between the circumferential outer wall of the first valve seat and the inner wall of the mounting groove, a first detection channel 61 is arranged on the shell corresponding to the first sealing component, a first gap 82 is arranged between the axial direction of the first valve seat and the axial direction of the first mounting groove, the first valve seat comprises a flow channel 911, and the flow channel is communicated with the pressure inlet; the right body is axially provided with a second mounting groove 23, the circumferential inner wall of the second mounting groove is provided with a second valve seat 93 in sealing fit, a second sealing assembly 94 is further arranged between the circumferential outer wall of the second valve seat and the inner wall of the second mounting groove, a second detection channel 62 is arranged on the shell corresponding to the second sealing assembly, and a second gap 84 is arranged between the axial direction of the second valve seat and the axial direction of the second mounting groove; the base plate 4 is rotatably provided with a ball 95, the first valve seat and the second valve seat are correspondingly arranged on two sides of the ball, a middle cavity 24 is formed between the inner wall of the top of the shell and the ball, and the shell and the middle cavity are provided with a third detection channel 63 which is communicated with each other. When the air pressure sensor is used, air pressure is input from the pressure inlet, the air flow firstly reaches the first sealing component along the first gap, at the moment, if the first sealing component has a sealing problem, the air pressure can flow out from the first detection channel, preferably, a connecting pipe can be arranged on the first detection channel, the air pressure is led into a metering instrument, the leakage amount is observed, and the connecting pipe can also extend into the water in between, if air bubbles are out, the leakage is indicated; on the other hand, the air pressure can reach the sealing auxiliary position of the first valve seat and the ball body through the flow channel, if leakage exists between the first valve seat and the ball body, the air pressure can enter the middle cavity and enter the third detection channel, and preferably, the third detection channel can be also provided with an additional air pipe, so that leakage can be distinguished between the leakage of the valve seat and the ball body and leakage of the sealing ring position, and the air pressure can flow out through the second detection channel if leakage occurs at the detection channel outlet, namely, the sealing ring position can be also determined if the soap bubble smeared on the outer wall of the shell body is foamed, and the air flow reaches the second sealing component position from the ball body through the third gap, similar to the first detection channel, and if leakage occurs at the second sealing component of the position.
In this embodiment, as shown in the figure, an adjusting nut 15 is further disposed on the left body, and the circumferential outer wall of the valve seat is in threaded fit with the adjusting nut. The pretightening force of the valve seat and the ball body can be adjusted, and the leakage quantity of the valve body and the valve seat is changed under different pretightening forces.
In this embodiment, as shown in the drawing, the right body is provided with an adjusting device for pressing the second seal assembly in the axial direction. The pressure of the second sealing component can be regulated by the regulating device, and the deformation quantity of the second sealing component is changed, so that the observation and regulation of the leakage quantity are realized.
In this embodiment, as shown in the drawing, the second sealing assembly includes a lip seal 941, the adjusting device includes a push rod 51, one end of the push rod extends into the housing and is provided with a push ring 52, the push ring is correspondingly disposed with the lip seal 941, and the push rod is in threaded fit with the inner wall of the housing. The shell is provided with a through hole, the ejector rod is in threaded fit with the inner wall of the through hole, the ejector rod is propped against the lip-shaped sealing ring through the rake ring, the pressure of the ejector rod and the lip-shaped sealing ring can be changed through the feeding amount, and the deformation amount of the lip-shaped sealing ring is further changed to observe the leakage change amount, so that the sealing performance of the ball valve under different pressure conditions can be simulated, the structure is simple, and the use is convenient.
In this embodiment, as shown in the drawing, the second sealing assembly includes a lip seal 941, the adjusting device includes a push rod 51, one end of the push rod extends into the housing and is provided with a push ring 52, the push ring is correspondingly disposed with the lip seal 941, a pressing plate 53 is pressed against the rear end of the push rod, and the pressing plate is connected with the outer wall of the housing through a screw 55. In this embodiment, the pressing plate is adopted to push the ejector rod inwards, and the screw can adjust the distance between the pressing plate and the shell, so as to adjust the feeding amount of the ejector rod.
In this embodiment, as shown in the drawing, a retainer ring 942 is further disposed between the push ring and the lip seal 941.
In this embodiment, as shown in the figure, the outer wall of the housing is connected with a fixing plate 17 through a screw, and the fixing plate is provided with a through hole in clearance fit with the ejector rod. The device is used for fixing the ejector rod, and is simple in structure and convenient to use.
In this embodiment, as shown in the figure, the chassis is provided with a groove 41, the bottom of the sphere is rotatably disposed in the groove, and an oil-free bearing 42 is disposed between the groove and the bottom of the sphere.
In this embodiment, as shown in the figure, an openable leak detection cover 18 is provided at the upper end of the housing corresponding to the sphere. The leak detection cover can be connected, clamped or buckled on the shell through screws.
In this embodiment, as shown in the drawing, the second detection channel 62 includes a through hole 621 formed at the bottom and communicating with the second mounting groove 23, a leak detection ring 54 is further disposed between the inner wall of the right body and the valve seat, and an annular groove 541 corresponding to the through hole is formed on the leak detection ring. The annular groove on the leakage detection ring has the same width as the diameter of the through hole, has the function of guiding the air flow to the through hole, and can better test leakage.
The examples should not be construed as limiting the invention, but any modifications based on the spirit of the invention should be within the scope of the invention.
Claims (6)
1. Fixed ball valve sealing performance detection device, including casing (1), its characterized in that: the shell comprises a left body (2), a right body (3) and a chassis (4);
the outer wall of one end of the left body is provided with a pressure inlet (21), the left body is axially provided with a first mounting groove (22), the circumferential inner wall of the first mounting groove is provided with a first valve seat (91) in sealing fit, a first sealing component (92) is further arranged between the circumferential outer wall of the first valve seat and the inner wall of the first mounting groove, a first detection channel (61) corresponding to the first sealing component is arranged on the shell, a first gap (82) is arranged between the axial direction of the first valve seat and the axial direction of the first mounting groove, the first valve seat comprises a flow channel (911), and the flow channel is communicated with the pressure inlet;
the right body is axially provided with a second mounting groove (23), the circumferential inner wall of the second mounting groove is provided with a second valve seat (93) in sealing fit, a second sealing assembly (94) is further arranged between the circumferential outer wall of the second valve seat and the inner wall of the second mounting groove, the shell is provided with a second detection channel (62) corresponding to the second sealing assembly, and a second gap (84) is arranged between the axial directions of the second valve seat and the second mounting groove;
a ball body (95) is rotatably arranged on the chassis (4), the first valve seat and the second valve seat are correspondingly arranged on two sides of the ball body, a middle cavity (24) is formed between the inner wall of the top of the shell and the ball body, and a third detection channel (63) communicated with the middle cavity is formed between the shell and the middle cavity;
the right body is provided with an adjusting device for pressing the second sealing assembly in the axial direction;
the second sealing assembly comprises a lip-shaped sealing ring (941), the adjusting device comprises a push rod (51), a push ring (52) is arranged at one end of the push rod extending into the shell, the push ring is arranged corresponding to the lip-shaped sealing ring (941), a pressing plate (53) is pressed at the rear end of the push rod, and the pressing plate is connected with the outer wall of the shell through a screw (55);
the ejector rod is ejected and pressed on the lip-shaped sealing ring through the ejector ring, the pressure between the ejector rod and the lip-shaped sealing ring can be changed through the feeding quantity, the deformation quantity of the lip-shaped sealing ring is further changed to observe the change quantity of leakage,
the second detection channel (62) comprises a through hole (621) which is arranged at the bottom and is communicated with the second mounting groove (23), a leakage detection ring (54) is further arranged between the inner wall of the right body and the valve seat, and an annular groove (541) corresponding to the through hole is arranged on the leakage detection ring.
2. The fixed ball valve sealing performance detection device of claim 1, wherein: and the left body is also provided with an adjusting nut (15), and the circumferential outer wall of the valve seat is in threaded fit with the adjusting nut.
3. The fixed ball valve sealing performance detection device of claim 2, wherein: a retainer ring (942) is further arranged between the push ring and the lip-shaped sealing ring (941).
4. The fixed ball valve sealing performance detection device according to claim 3, wherein: the outer wall of the shell is connected with a fixing plate (17) through a screw, and the fixing plate is provided with a through hole in clearance fit with the ejector rod.
5. The fixed ball valve sealing performance detection device of claim 1, wherein: the chassis is provided with a groove (41), the bottom of the sphere is rotatably arranged in the groove, and an oil-free lubrication bearing (42) is arranged between the groove and the bottom of the sphere.
6. The fixed ball valve sealing performance detection device of claim 1, wherein: an openable leak detection cover (18) is arranged at the upper end of the shell and corresponds to the sphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711018659.XA CN107727316B (en) | 2017-10-26 | 2017-10-26 | Sealing performance detection device for fixed ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711018659.XA CN107727316B (en) | 2017-10-26 | 2017-10-26 | Sealing performance detection device for fixed ball valve |
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| CN107727316A CN107727316A (en) | 2018-02-23 |
| CN107727316B true CN107727316B (en) | 2023-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711018659.XA Active CN107727316B (en) | 2017-10-26 | 2017-10-26 | Sealing performance detection device for fixed ball valve |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109630679B (en) * | 2018-12-07 | 2021-07-09 | 首都航天机械有限公司 | Multifunctional combined sealing clamp |
| CN111735579B (en) * | 2020-07-07 | 2022-05-31 | 河南航天液压气动技术有限公司 | Test device for detecting tightness of workpiece |
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| CN107727316A (en) | 2018-02-23 |
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Address after: No.1921 Binhai 1st Road, Wenzhou Economic and Technological Development Zone, Wenzhou City, Zhejiang Province 325000 Applicant after: Founder Valve Group Co.,Ltd. Address before: Ou Bei Zhen He Yi Cun, Yongjia County, Wenzhou City, Zhejiang Province Applicant before: FANGZHENG VALVE GROUP CO.,LTD. |
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