CN218381463U - Can dismantle off-line testing arrangement of check valve - Google Patents

Abstract

An off-line testing device of a detachable check valve comprises a guide sleeve, a first sealing cover and a second sealing cover, wherein the guide sleeve is provided with two ports which are opposite along the axial direction of the guide sleeve; the first sealing cover and the second sealing cover are respectively arranged for sealing and covering two ports of the guide sleeve so as to form an accommodating space for accommodating the check valve in an enclosing manner, so that the loading state of the check valve in the application environment is simulated, and the first sealing cover is provided with an air inlet channel for hermetically communicating the valve cavity of the check valve with an external air source; the second sealing cover is provided with an exhaust channel, and the exhaust channel is used for communicating the accommodating space with the detection device in a sealing mode, so that the air tightness of the check valve is detected offline, and the air tightness qualification rate of the check valve in the practical application environment is improved.

Description

Can dismantle off-line testing arrangement of check valve

Technical Field

The utility model relates to a check valve gas tightness detects technical field, concretely relates to can dismantle off-line testing arrangement of check valve.

Background

In the prior art, regarding to the requirement on the maintenance process of the lifting check valve, a blue oil test is generally performed after a valve flap and a valve seat are ground, and the blue oil test is qualified and then is installed back to an application environment. However, in the actual operation process, the requirement of the blue oil on the tightness of the valve clack and the valve seat is low in the blue oil test, that is, the detection result of the blue oil test is easily misjudged, and the test of the tightness (penetration piece) of the check valve in the application environment is difficult to be qualified.

SUMMERY OF THE UTILITY MODEL

The utility model provides a can dismantle off-line testing arrangement of check valve aims at improving the air tightness test success rate of check valve on the applied environment.

An off-line testing device of a detachable check valve comprises a guide sleeve, a first sealing cover and a second sealing cover, wherein the guide sleeve is provided with two ports which are opposite along the axial direction of the guide sleeve; the first sealing cover and the second sealing cover are respectively arranged for sealing and covering two ports of the guide sleeve so as to form an accommodating space for accommodating the check valve in an enclosing manner; the first sealing cover is provided with an air inlet passage, and the air inlet passage is used for hermetically communicating a valve cavity of the check valve with an external air source; the second sealing cover is provided with an exhaust passage, and the exhaust passage is used for communicating the accommodating space with the detection device in a sealing mode.

In one embodiment, the first sealing cover and the second sealing cover comprise sealing gaskets and abutting covers, each sealing gasket is provided with an air guide through hole which is communicated with the corresponding guide sleeve, each sealing gasket covers the port of the corresponding guide sleeve, each abutting cover is provided with an air guide channel which is communicated with the corresponding guide sleeve, each abutting cover is overlapped with each sealing gasket to cover the arrangement of each sealing gasket, the outline edge of each sealing gasket is tightly pressed on the port end face of the corresponding guide sleeve, the part, surrounding the air guide through hole, of each sealing gasket is tightly pressed on the check valve, and the air guide channels are communicated with the air guide through holes in a coaxial sealing mode to form the corresponding air inlet channels and the corresponding exhaust channels.

In one embodiment, the pressing cover further comprises a fastener, and the pressing cover is provided with a connecting part protruding out of the circumferential surface of the guide sleeve; and two ends of the fastening piece are respectively connected with the connecting parts at the corresponding end sides, so that the guide sleeve is fixed between the first sealing cover and the second sealing cover.

In one embodiment, the number of the connecting parts is set to be a plurality, the connecting parts are uniformly distributed around the axial direction of the guide sleeve, and each connecting part corresponds to one fastener.

In one embodiment, the gasket is a plate-like structure made of a rubber material.

In one embodiment, the device further comprises a detection device, wherein the detection device comprises a conduit and a container for containing liquid, one end of the conduit extends into the position below the liquid level of the container, and the other end of the conduit is in sealed communication with the exhaust channel.

In one embodiment, the end of the conduit remote from the container is fitted with a sealing plug which is removably inserted into the vent passage.

In one embodiment, the air inlet pipeline is further included and is communicated between the air inlet channel and an external air source in a sealing mode, a stop valve is arranged on the air inlet pipeline and is used for conducting and cutting off the air inlet pipeline.

In one embodiment, the air conditioner further comprises a pressure reducing valve, wherein the pressure reducing valve is arranged on the air inlet pipeline and used for adjusting the output air pressure of an external air source to a preset pressure.

In one embodiment, the air inlet pipeline further comprises a pressure gauge, and the pressure gauge is located between the stop valve and an external air source and used for displaying pressure information of the air inlet pipeline.

According to the off-line testing device of the detachable check valve provided by the embodiment, two ports of the guide sleeve are respectively sealed and covered with the first sealing cover and the second sealing cover to form an accommodating space for accommodating the check valve, wherein the first sealing cover and the second sealing cover are further stably connected with the guide sleeve through fasteners to ensure that the check valve is stably arranged in the accommodating space, so that the loading state of the check valve in the application environment of the check valve is simulated; meanwhile, an air inlet channel communicated with the check valve cavity is arranged on the first sealing cover, an air exhaust channel is arranged on the second sealing cover, and the air exhaust channel is used for hermetically communicating the accommodating space with the detection device; therefore, the first sealing cover, the second sealing cover, the air inlet channel, the air exhaust channel and the guide sleeve form an air tightness detection assembly, the air tightness of the check valve can be detected in advance, and the air tightness leakage probability of the check valve in an application environment is further reduced.

Drawings

FIG. 1 is a cross-sectional view of an example of an off-line testing apparatus for a removable check valve;

FIG. 2 is a flow chart of an example of an offline testing apparatus for a removable check valve;

FIG. 3 is a cross-sectional view of an off-line testing apparatus for a removable check valve according to an embodiment (not including a check valve).

The reference numerals in the figures are as follows:

1. a guide sleeve;

2. a first sealing cover; 21. an air intake passage; 22. a first pressing cover; 23. a first gasket;

3. a second sealing cover; 31. an exhaust passage; 32. a second pressing cover; 33. a second gasket;

4. a fastener;

5. a connecting portion;

6. a sealing plug;

7. a detection device; 71. a conduit; 72. a container;

8. a check valve; 81. a valve seat; 82. a valve flap; 83. a cage; 84. a spring; 85. a disc spring; 86. a spring seat;

9. a stop valve;

10. a pressure reducing valve;

11. an air intake line;

12. a pressure gauge;

13. an accommodation space.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

The present application provides an off-line testing device for the air tightness detection of a check valve, and please refer to fig. 1 specifically, wherein the check valve 8 includes a valve seat 81, a valve flap 82, a valve cage 83, a spring 84, a disc spring 85, and a spring seat 86, and those skilled in the art should know the structural layout relationship among the above functional components, so that the check valve to be detected is not described in detail herein.

Referring to fig. 1 to 3, the off-line testing device includes a guide sleeve 1, a first sealing cover 2 and a second sealing cover 3, the guide sleeve 1 has two axially opposite ports, the first sealing cover 2 and the second sealing cover 3 can be respectively fixed at the two ports for sealing and covering the guide sleeve 1, and an accommodation space 13 for accommodating the check valve 8 is formed by the first sealing cover 2, the second sealing cover 3 and the guide sleeve 1; meanwhile, the first sealing cover 2 is provided with an air inlet channel 21 communicated with a valve cavity in the check valve 8, and the second sealing cover 3 is provided with an air outlet channel 31 communicated with the accommodating space 13 and the detection device 7.

In this technical scheme, the combination of first sealed lid 2, second sealed lid 3 and guide pin bushing 1 simulates out the application environment that check valve 8 was loaded in reality in essence, consequently, off-line test out the gas tightness of check valve 8, can avoid check valve 8 to really install on the system, just discover the problem that the gas tightness is not up to standard in the actual work environment promptly, avoids reducing efficiency and extravagant manpower and material resources.

Specifically, the check valve 8 is fixed in the accommodating space 13 in a sealing manner through the first sealing cover 2 and the second sealing cover 3, and the valve cavity of the check valve 8 can be communicated with an external air source in a sealing manner through the air inlet passage 21 arranged on the first sealing cover 2; by means of the venting channel provided on the second sealing cover 3, the receiving space 13 can be brought into communication with the detection device 7. During the test, the gaseous accessible inlet channel 21 of external air source output enters into the valve pocket of check valve 8, at this in-process, if the sealed face grinding condition on valve clack 82, the disk seat 81 in the check valve 8 is not up to standard, then the valve intracavity gas of check valve 8 then can leak to in the accommodation space 13, and finally flow out via exhaust passage 31, thereby detected by detection device 7, according to the testing result (for example what of gas output) of detection device 7, can make the judgement to the gas tightness of check valve 8, and then improve or directly load check valve 8 according to the result again.

Based on this, can effectively improve the probability that check valve 8 carries out up to standard of gas tightness test on the system through this testing arrangement, simplify among the traditional approach to check valve 8 the process that the gas tightness detected on the system, because check valve 8 is unqualified, just need to come back to polish and change, if at every turn through carrying out the gas tightness detection with check valve 8 on the system, judge the gas tightness degree of check valve 8, this process is all more loaded down with trivial details, and inefficiency, and extravagant manpower and material resources. Wherein the system is shown as the environment in which the check valve is actually used.

In one embodiment, referring to fig. 1, the first sealing cover 2 and the second sealing cover 3 include a sealing gasket and a pressing cover, wherein the sealing gasket has a through-hole for guiding air, the sealing gasket covers the end of the guide sleeve 1, and the pressing cover has a through-channel for guiding air; the pressing cover is overlapped and covers the sealing gasket to enable the outline edge of the sealing gasket to be tightly pressed on the end face of the port of the guide sleeve 1, and the air guide channel on the pressing cover is coaxially and hermetically communicated with the air guide through hole on the sealing gasket, so that a corresponding air inlet channel and an air exhaust channel are formed; this design is in order to guarantee that only one inlet channel 21 and exhaust passage 31 in the accommodation space 13, and the gas of avoiding in the accommodation space 13 flows out from the gap of other structures, causes the data inaccuracy that the gas tightness detected to influence operating personnel's judgement.

For convenience of description, the packing and the pressing cover on the first sealing cover 2 are defined as a first packing 23 and a first pressing cover 22, respectively, and the packing and the pressing cover on the second sealing cover 3 are defined as a second packing 33 and a second pressing cover 32, respectively.

The part of the first sealing gasket 23 surrounding the air guide through hole is pressed on the spring seat 86 of the check valve 8 by the pressure of the first pressing cover 22, so that an external air source enters the valve cavity of the check valve 8 from the air guide channel and cannot overflow into the accommodating space 13, and the air tightness detection data is influenced. Based on the same requirement, the second sealing gasket 33 is affected by the pressure of the check valve 8, the second sealing gasket 33 is in close contact with the second abutting cover 32, and the gas guide through hole in the second sealing gasket 33 is coaxially and hermetically communicated with the gas guide channel in the second abutting cover 32, so that the gas in the accommodating space 13 can specifically flow into the detection device for the gas leaked from the check valve 8.

In one embodiment, the off-line testing device further comprises a fastening member 4, the abutting pressing cover is provided with a connecting portion 5 protruding from the circumferential surface of the guide sleeve 1, two ends of the fastening member 4 are respectively connected with the connecting portions 5 on the corresponding end sides, so as to pull and fix the first sealing cover 2 and the second sealing cover 3 in an opposite direction along the axial direction of the guide sleeve 1, thereby stabilizing the position of the check valve in the accommodating space 13 and preventing the gas in the accommodating space 13 from flowing out from a gap between contact surfaces of the sealing covers and the guide sleeve.

Further, the fastening member 4 is a connecting rod, the connecting portion 5 is a nut, and the nut is in threaded connection with an end portion of the connecting rod, so as to tension the first sealing cover 2 and the second sealing cover 3 in an opposite direction, in other embodiments, the fastening member 4 is a bolt or other connecting rod structure, and the connecting portion 5 is a buckle structure or the like.

Wherein, the quantity of connecting portion 5 sets up to a plurality ofly, for example two, three, a plurality of, when connecting portion 5 quantity is at least three, at least three connecting portion 5 evenly arranges around the axial of guide pin bushing 1, and every connecting portion 5 homogeneous correspondence has a fastener 4 to stabilize the relative position between first sealed lid 2 and the sealed 3 of second. In other embodiments, when the number of the connecting portions 5 is two, the two connecting portions 5 are located at two ends of the sealing cover respectively and are symmetrically arranged, and similarly, the connecting portions 5 are all arranged in one-to-one correspondence with the fastening members 4.

Further, the sealing gasket is a plate-shaped structural body made of rubber materials, and the rubber materials have good effects on sealing performance and water resistance, so that gas in the accommodating space 13 is prevented from flowing out of gaps except for the air inlet channel and the air outlet channel, and air tightness detection data is prevented from being influenced.

In one embodiment, the testing device further comprises a detecting device 7, the detecting device 7 comprises a conduit 71 and a container 72 for containing liquid, one end of the conduit 71 extends below the liquid level of the container 72, and the other end is in sealed communication with the exhaust passage 31, besides, one end of the conduit 71 away from the container 72 is sleeved with a sealing plug 6, and the sealing plug 6 is detachably inserted into the exhaust passage 31, so that the conduit 71 is in sealed communication with the exhaust passage 31, and gas is completely introduced from the conduit 71 to the detecting device 7.

Further, gas in the air supply can get into 8 valve pockets of check valve, and rethread exhaust passage 31 enters into detection device 7 and inspects, and in gas entered into liquid through pipe 71 promptly, the bubble will appear on the liquid, and operating personnel then can judge the gas tightness condition of check valve 8 according to bubble quantity, and what this scheme liquid adopted is water.

In one embodiment, referring to fig. 1 specifically, the present device further includes an air inlet pipeline 11, black hatching in fig. 1 defines the air inlet pipeline 11, the air inlet pipeline 11 is hermetically communicated between the air inlet channel 21 and an external air source, the air inlet pipeline 11 is provided with a stop valve 9, the stop valve 9 is used for connecting and disconnecting the air inlet pipeline 11, and it is ensured that the air pressure of the valve cavity in the stop valve 8 is stable.

In one embodiment, the system further comprises a pressure reducing valve 10, wherein the pressure reducing valve 10 is disposed on the air inlet pipeline 11 and is used for adjusting the output air pressure of the external air source to a preset pressure.

In the technical scheme, the airtightness detection is judged according to the standard of a valve pressure test in GB/T13927-2008, the test medium is gas, the test pressure is 0.6MPa +/-0.1 MPa, when the nominal pressure of the valve is smaller than PN10, the test pressure is 1.1 times of the maximum allowable working pressure of the valve at 20 ℃, further, the maximum allowable leakage rate of the sealing test is grade B, and the number of bubbles is 0.28xDN.

In one embodiment, referring to fig. 1, the pressure gauge 12 is further included, and the pressure gauge 12 is located between the stop valve 9 and the external air source and is used for displaying the air source pressure information.

The concrete operation mode of this technical scheme does, external compressed air passes through air inlet pipeline 11 and gets into relief pressure valve 10, relief pressure valve 10 falls compressed air to 6barg, then compressed air after the step-down is carried to check valve 8's valve chamber in through air inlet pipeline 11, then close stop valve 9, the pressure that keeps check valve 8 valve chamber, last gas passes through exhaust passage 31 and gets into detection device 7, operating personnel is according to bubble quantity, thereby verify disk seat 81, the grinding condition of the sealed face of valve clack 82, judge check valve 8's leakproofness promptly.

It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.

Claims (10)

1. The off-line testing device of the detachable check valve is characterized by comprising a guide sleeve (1), a first sealing cover (2) and a second sealing cover (3), wherein the guide sleeve (1) is provided with two ports which are opposite along the axial direction of the guide sleeve; the first sealing cover (2) and the second sealing cover (3) are respectively arranged for sealing and covering two ports of the guide sleeve (1) so as to form an accommodating space (13) for accommodating the check valve (8) in an enclosing manner; the first sealing cover (2) is provided with an air inlet passage (21), and the air inlet passage (21) is used for hermetically communicating a valve cavity of the check valve (8) with an external air source; the second sealing cover (3) is provided with an air exhaust channel (31), and the air exhaust channel (31) is used for enabling the accommodating space (13) to be in sealing communication with the detection device (7).

2. The off-line testing device of claim 1, wherein the first sealing cover (2) and the second sealing cover (3) comprise sealing gaskets and abutting covers, each sealing gasket is provided with a through air guide through hole, each sealing gasket covers a port of the corresponding guide sleeve (1), each abutting cover is provided with an through air guide channel, each abutting cover is overlapped and covers the corresponding sealing gasket to tightly press the profile edge of each sealing gasket to the port end face of the corresponding guide sleeve (1) and tightly press the part, surrounding the corresponding air guide through hole, of each sealing gasket to the check valve (8), and the air guide channels are coaxially and hermetically communicated with the corresponding air guide through holes to form the corresponding air inlet channel (21) and the corresponding air exhaust channel (31).

3. The off-line testing apparatus of claim 2, further comprising a fastening member (4), the abutting cover having a connection portion (5) provided to protrude from a circumferential surface of the guide sleeve (1); the two ends of the fastening piece (4) are respectively connected with the connecting part (5) at the corresponding end side, so that the guide sleeve (1) is fixed between the first sealing cover (2) and the second sealing cover (3).

4. The off-line testing device of claim 3, characterized in that the number of the connecting parts (5) is set to be a plurality, the connecting parts (5) are uniformly arranged around the axial direction of the guide sleeve (1), and each connecting part (5) corresponds to one fastener (4).

5. The off-line testing device of claim 2, wherein the gasket is a plate-like structure made of a rubber material.

6. The off-line testing device according to any one of claims 1 to 5, further comprising a detection device (7), wherein the detection device (7) comprises a conduit (71) and a container (72) for containing a liquid, one end of the conduit (71) extends below the liquid level of the container (72), and the other end of the conduit (71) is in sealed communication with the exhaust passage (31).

7. An off-line testing device according to claim 6, characterized in that a sealing plug (6) is sleeved on the end of the conduit (71) away from the container (72), and the sealing plug (6) is detachably inserted in the exhaust passage (31).

8. The off-line testing device of any one of claims 1 to 5, further comprising an air inlet pipeline (11), wherein the air inlet pipeline (11) is in sealed communication between the air inlet channel (21) and an external air source, and a stop valve (9) is arranged on the air inlet pipeline (11), and the stop valve (9) is used for connecting and disconnecting the air inlet pipeline (11).

9. The off-line testing device of claim 8, further comprising a pressure reducing valve (10), wherein the pressure reducing valve (10) is disposed on the air inlet line (11) for adjusting the output air pressure of the external air source to a preset pressure.

10. The off-line testing device of claim 8, further comprising a pressure gauge (12), the pressure gauge (12) being located between the shut-off valve (9) and an external air source for displaying pressure information of the air intake line (11).

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