CN221198805U - Sealing test tool - Google Patents

Abstract

The utility model provides a sealing test tool, which is used for testing the sealing performance of a sealing surface of a sealing gasket in a valve, and comprises the following components: the tool body is internally provided with an installation cavity, and the sealing gasket is in limit fit with the inner wall of the installation cavity; the fixing piece is detachably arranged on the tool main body; one end of the fixing piece extends into the mounting cavity and is abutted with one end of the sealing gasket away from the sealing surface so as to fix the sealing gasket in the mounting cavity; and one end of the pressure rod is movably arranged in the mounting cavity, and the other end of the pressure rod is connected with external pressure applying equipment and is used for applying axial pressure to the sealing surface so as to test the sealing surface. The axial loading force of the pressure rod is used for replacing the gas pressure in the existing mode; the fatigue life test of the sealing surface is realized, and the sealing performance measurement of the sealing surface is completed; compared with the existing sealing test mode, the utility model has the advantages of simple structure, low test cost, low test difficulty and low risk, and is convenient for the staff to test.

Description

Sealing test tool

Technical Field

The utility model relates to the technical field of sealing gasket testing equipment, in particular to a sealing testing tool.

Background

At present, hydrogen energy becomes one of the novel green energy sources with the most development potential in the 21 st century due to the advantages of high efficiency, environmental protection and the like; however, in links such as liquid hydrogen storage, transportation and vehicle-mounted, the safety of hydrogen storage cannot be effectively ensured, so that the large-scale development of hydrogen energy is seriously hindered.

In order to detect the safety of hydrogen storage and transportation, the service life of a sealing surface of a valve used in a vehicle-mounted hydrogen storage system on a hydrogen fuel cell automobile needs to be tested to verify the reliability of the sealing surface of the valve; the existing traditional mode for testing the service life of the sealing surface of the valve requires the valve, test equipment capable of applying and bearing high pressure and a large amount of test gas; when in testing, firstly, the valve to be tested is connected to a pipeline, gas pressure is provided at the upstream of the valve to be tested, then the valve to be tested is opened, the valve to be tested is closed, the gas pressure is sequentially opened and closed, one life cycle is completed, and the durability of the sealing surface of the valve is tested after a plurality of life cycles (namely, the fatigue test of the switch valve); however, the cost of the test medium in the existing test mode is high, the gas pressure during the test can reach 87.5MPa, the risk is high, and the large-scale test is not facilitated.

Therefore, the existing sealing test mode has the problems of high test cost, high difficulty, high risk and inconvenient test; there is a need for a seal testing tool that addresses the above issues.

Disclosure of utility model

The utility model provides a sealing test tool which aims at solving the problems of high test cost, high difficulty, high risk and inconvenient test of a sealing test mode in the prior art.

In order to solve the above problems, the present utility model provides a seal testing tool for testing the tightness of a sealing surface of a gasket in a valve, including: the tool body is internally provided with an installation cavity, and the sealing gasket is in limit fit with the inner wall of the installation cavity; the fixing piece is detachably arranged on the tool main body; one end of the fixing piece extends into the mounting cavity and is abutted with one end of the sealing gasket away from the sealing surface so as to fix the sealing gasket in the mounting cavity; and one end of the pressure rod is movably arranged in the mounting cavity, and the other end of the pressure rod is connected with external pressure applying equipment and is used for applying axial pressure to the sealing surface so as to test the sealing surface.

Further, the tool main body is also provided with an inflow channel and an outflow channel which are respectively communicated with the mounting cavity; wherein when the pressure rod abuts against the sealing surface, the communication between the inflow passage and the outflow passage is interrupted.

Further, the sealing gasket is provided with a valve port and a flow channel communicated with the valve port, and the end surface of the valve port, which is used for being abutted with the pressure rod, is a sealing surface; the inflow channel is arranged at one side of the valve port, which is away from the direction of entering the valve port, the outflow channel is communicated with the circulation channel, and the pressure rod closes the valve port to disconnect the communication between the inflow channel and the valve port.

Further, the valve port is a conical port, the abutting end of the pressure rod and the valve port is a conical head, and the conical head is matched with the conical port so as to be used for closing the valve port.

Further, the sealing test tool further comprises two connectors, wherein one connector is communicated with an inlet of the inflow channel and is used for accessing an external fluid source; the other connector communicates with the outlet of the outflow channel for discharging the fluid.

Further, the inner wall of the mounting cavity is provided with a limiting step, and the limiting step is abutted with the outer wall of the sealing gasket so as to axially limit the sealing gasket; the sealing test tool further comprises a first sealing ring, wherein the first sealing ring is sleeved at one end of the fixing piece extending into the mounting cavity and is in butt fit with the inner wall of the mounting cavity so as to seal the mounting cavity.

Further, the sealing test tool also comprises a coupler and a thrust pad, wherein one end of the coupler is connected with external pressing equipment, and the other end of the coupler is connected with a pressure rod so as to transmit pressure; the thrust pad is arranged between the coupler and the pressure rod, the hardness and the strength of the thrust pad are not less than those of the pressure rod, and the thrust pad is used for transmitting pressure.

Further, the sealing test tool also comprises a pressing plate assembly and a pressing sleeve assembly, and one end of the pressing rod sequentially penetrates through the pressing plate assembly and the pressing sleeve assembly and then stretches into the mounting cavity; at least one part of the pressing sleeve component stretches into the mounting cavity to seal the mounting cavity, and the pressing plate component is matched with the pressing sleeve component and connected with the tool main body to fixedly arrange the pressing sleeve component between the pressing plate component and the tool main body; the sealing gasket is provided with a valve port, and the end surface of the valve port, which is used for being abutted with the pressure rod, is a sealing surface; the pressing plate assembly has a locking state and a releasing state; in the locking state, the pressure plate assembly fixes a pressure rod, and the pressure rod presses the sealing surface with a certain pressure to close the valve port; in the released state, the pressure lever is movable relative to the valve port to repeatedly impact the sealing surface with a certain pressure.

Further, the pressing plate assembly comprises a pressing plate, a split ring and a connecting piece, wherein a first through hole is formed in the pressing plate; the pressure rod passes through the first through hole, and a positioning ring groove is formed in the periphery of the pressure rod; the split ring is arranged in the first through hole and is in limit fit with the positioning ring groove; the connecting piece is connected with the crimping plate and the tooling main body respectively; the connecting piece is used for fixing the crimping plate on the tool main body in a locking state, and the inner wall of the first through hole is abutted with the split ring so as to fix the pressure rod; in the loosening state, the inner wall of the first through hole is separated from contact with the split ring, and the split ring moves along with the pressure rod; or in the released state, the pressure plate assembly is disengaged from the pressure bar.

Further, the pressing sleeve assembly comprises a pressing sleeve, a second sealing ring and a third sealing ring; the periphery of the pressure joint sleeve is in limit fit with the inner wall of the mounting cavity, a second through hole is formed in the pressure joint sleeve, and the pressure rod penetrates through the second through hole; the second sealing ring is sleeved at one end of the crimping sleeve extending into the mounting cavity and is in butt joint sealing fit with the inner wall of the mounting cavity; the third sealing ring is arranged in the second through hole and is in sealing fit with the periphery of the pressure rod.

By applying the technical scheme of the utility model, the utility model provides a sealing test tool, which is used for testing the sealing performance of a sealing surface of a sealing gasket in a valve and comprises the following steps: the tool body is internally provided with an installation cavity, and the sealing gasket is in limit fit with the inner wall of the installation cavity; the fixing piece is detachably arranged on the tool main body; one end of the fixing piece extends into the mounting cavity and is abutted with one end of the sealing gasket away from the sealing surface so as to fix the sealing gasket in the mounting cavity; and one end of the pressure rod is movably arranged in the mounting cavity, and the other end of the pressure rod is connected with external pressure applying equipment and is used for applying axial pressure to the sealing surface so as to test the sealing surface.

According to the utility model, the axial pressure is applied to the sealing surface on the sealing gasket by arranging the pressure rod, and the axial loading force of the pressure rod is used for replacing the gas pressure in the existing mode; according to the utility model, certain pressure can be controlled by the external pressure applying equipment and the pressure sensor to be transmitted to the pressure rod, and then the pressure rod impacts the sealing surface again and again, so that the fatigue life of the sealing surface is tested, and the sealing performance of the sealing surface is measured; compared with the existing sealing test mode, the utility model has the advantages of simple structure, low test cost, low test difficulty and low risk, and is convenient for the staff to test conveniently and rapidly; according to the utility model, the dwell time of the pressure rod on the sealing surface can be effectively adjusted according to the test requirement, then the fluid for test is introduced into the mounting cavity, and the tightness is further tested in a mode of simulating valve closing; the mode can completely replace the existing mode of directly testing by adopting a valve, and can finish the air tightness test of sealing surfaces with different materials and different forms by flexibly setting the size of the mounting cavity, thereby effectively shortening the test time and reducing the test cost; the utility model can replace a valve to directly verify the fatigue life of the sealing surface of the sealing gasket; in actual use, the utility model can simulate the gas pressure of 90MPa for test; according to the utility model, the sealing gaskets with different materials and different structures can be tested by replacing the pressure rods with different materials and different structures; the utility model has the advantages of simple structure, convenient operation, low processing difficulty, repeated test and low cost, and is suitable for large-scale popularization and use.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

Fig. 1 shows a specific structural schematic diagram of a seal test tool according to a first embodiment of the present utility model;

Fig. 2 shows a specific structural schematic diagram of a seal testing tool according to a second embodiment of the present utility model;

Fig. 3 shows an enlarged view of a portion of a seal test tool provided by an embodiment of the present utility model at a seal gasket.

Wherein the above figures include the following reference numerals:

10. A sealing gasket; 11. sealing surfaces; 12. a valve port; 13. a flow channel;

20. A tool main body; 21. a mounting cavity; 22. an inflow channel; 23. an outflow channel; 24. a limit step;

30. A fixing member;

40. a pressure rod; 41. positioning ring grooves;

50. A joint;

60. A first seal ring;

70. a coupling;

80. a thrust pad;

90. A platen assembly; 91. a pressing plate; 911. a first through hole; 92. split ring; 93. a connecting piece;

100. A press sleeve assembly; 101. a press-connection sleeve; 102. a second seal ring; 103. and a third sealing ring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 3, an embodiment of the present utility model provides a seal testing tool for testing sealability of a sealing surface 11 of a gasket 10 in a valve, including: the tool main body 20 is internally provided with an installation cavity 21, and the sealing gasket 10 is in limit fit with the inner wall of the installation cavity 21; the fixing piece 30 is detachably arranged on the tool main body 20; one end of the fixing piece 30 extends into the mounting cavity 21 and abuts against one end of the sealing gasket 10, which is away from the sealing surface 11, so as to fix the sealing gasket 10 in the mounting cavity 21; a pressure rod 40, one end of which is movably disposed in the mounting chamber 21 and the other end of which is connected to an external pressing device, for applying an axial pressure to the sealing surface 11 to test the sealing surface 11.

According to the utility model, the pressure rod 40 is arranged to apply axial pressure to the sealing surface 11 on the sealing gasket 10, and the axial loading force of the pressure rod 40 is used for replacing the gas pressure in the existing mode; according to the utility model, certain pressure can be controlled by external pressure applying equipment and a pressure sensor to be transmitted to the pressure rod 40, and then the pressure rod 40 performs impact on the sealing surface 11 again and again, so that the fatigue life of the sealing surface 11 is tested, and the sealing performance of the sealing surface 11 is measured; compared with the existing sealing test mode, the utility model has the advantages of simple structure, low test cost, low test difficulty and low risk, and is convenient for the staff to test conveniently and rapidly; according to the utility model, the dwell time of the pressure rod 40 on the sealing surface 11 can be effectively adjusted according to the test requirement, and then fluid (gas or liquid) for test is introduced into the mounting cavity 21, and the tightness is further tested in a mode of simulating valve closing; the mode can completely replace the existing mode of directly testing by adopting a valve, and can finish the air tightness test of sealing surfaces 11 with different materials and different forms by flexibly setting the size of the mounting cavity 21, thereby effectively shortening the test time and reducing the test cost; the utility model can replace a valve to directly perform fatigue life verification of the sealing surface 11 of the sealing gasket 10; in actual use, the utility model can simulate the gas pressure of 90MPa for test; the utility model can test the sealing gaskets 10 with different materials and different structures by replacing the pressure rods 40 with different materials and different structures; the utility model has the advantages of simple structure, convenient operation, low processing difficulty, repeated test and low cost, and is suitable for large-scale popularization and use.

As shown in fig. 1 and 3, the tool main body 20 further has an inflow passage 22 and an outflow passage 23 communicating with the installation cavity 21, respectively, the inflow passage 22 and the outflow passage 23 being for circulating fluid for testing sealability, respectively; wherein when the pressure rod 40 abuts against the sealing surface 11, the communication between the inflow passage 22 and the outflow passage 23 is disconnected.

By arranging the inflow channel 22 and the outflow channel 23, the sealing test tool can effectively adjust the stop time of the pressure rod 40 on the sealing surface 11 according to test requirements, then fluid (gas or liquid) for test is introduced into the mounting cavity 21, and the tightness is further tested in a mode of simulating valve closing; the mode can completely replace the existing mode of directly testing by adopting the valve, and can finish the air tightness test of the sealing surfaces 11 with different materials and different forms by flexibly setting the size of the mounting cavity 21, thereby effectively shortening the test time and reducing the test cost.

As shown in fig. 1 and 3, the gasket 10 has a valve port 12, and a flow passage 13 communicating with the valve port 12, and an end surface of the valve port 12 for abutting against the pressure rod 40 is a sealing surface 11; wherein the inflow passage 22 is provided on a side of the valve port 12 facing away from the direction of entering the valve port 12, the outflow passage 23 communicates with the flow passage 13, and the pressure lever 40 closes the valve port 12 to interrupt communication between the inflow passage 22 and the valve port 12. By the arrangement, the working mode of opening and closing the valve is further simulated, and the sealing surface 11 can be efficiently tested.

It should be noted that: the "direction of entering the valve port 12" refers to a flow direction of fluid from one end of the valve port 12 into the valve port 12 to the other end of the valve port 12 to enter the flow channel 13, i.e., the direction of entering the valve port 12 is a direction from the valve port 12 to the flow channel 13 (e.g., a top-to-bottom direction in fig. 1); thus, "a direction away from the direction of entry into the valve port 12" means that the inflow channel 22 is disposed in a direction away from the flow channel 13 from the valve port 12 (e.g., a bottom-up direction in fig. 1).

As shown in fig. 1, 2 and 3, the valve port 12 is a tapered opening, and the abutting end of the pressure rod 40 and the valve port 12 is a tapered head, and the tapered head is matched with the tapered opening so as to be used for closing the valve port 12. By providing the valve port 12 as a tapered port, the sealing surface 11 is made as a tapered surface, and thus the test of the sealing property and durability (i.e., impact fatigue test) of the tapered surface is realized.

As shown in fig. 1, the seal testing tool further includes two connectors 50, one connector 50 being in communication with the inlet of the inflow channel 22 for accessing an external fluid source; the other connector 50 communicates with the outlet of the outflow channel 23 for discharging the fluid. By providing the joint 50, a reliable connection to the external fluid source and the external fluid discharge channel is achieved, thereby ensuring the operational reliability of the sealed test fixture during testing.

It should be noted that: the joint 50 may or may not be installed when it is necessary to perform the test of the tightness of the seal surface 11 by simulating the closing of the valve (i.e., to perform the reliability test on the seal surface 11), and to perform the test of repeatedly striking the seal surface 11 (i.e., to perform the fatigue durability test on the seal surface 11).

As shown in fig. 1, 2 and 3, the inner wall of the mounting cavity 21 is provided with a limiting step 24, and the limiting step 24 is abutted with the outer wall of the sealing gasket 10 so as to axially limit the sealing gasket 10; the sealing test tool further comprises a first sealing ring 60, wherein the first sealing ring 60 is sleeved at one end of the fixing piece 30 extending into the installation cavity 21 and is in butt fit with the inner wall of the installation cavity 21 so as to seal the installation cavity 21. By arranging the limit step 24 to be matched with the fixing piece 30, reliable limit of the sealing gasket 10 is realized in the axial direction, the movement of the sealing gasket 10 during testing is avoided, and the accuracy of a test result is further ensured; through setting up first sealing washer 60, realized that mounting 30 stretches into the reliable seal of the one end of installation cavity 21, and then avoided the fluid leakage when the gas tightness test, guaranteed the security.

It should be noted that: in one embodiment of the present utility model, the periphery of the gasket 10 is provided with a shoulder which cooperates with the stop step 24 to axially stop the gasket 10; the limiting principle of the limiting step 24 is that the limiting of the sealing gasket 10 is realized by dimensional change in the axial direction of the sealing gasket 10 (for example, the dimension of the inner wall of the mounting cavity 21 is reduced at the limiting step 24); for example: when the shaft shoulder on the periphery of the sealing gasket 10 is a right-angle shaft shoulder, the limiting step 24 is also a right-angle step, and the step surface of the right-angle step divides the size of the inner wall of the mounting cavity 21 into two different sizes; when the shaft shoulder on the periphery of the sealing gasket 10 is an inclined shaft shoulder (for example, the periphery of the sealing gasket 10 is provided with a conical positioning surface), the limiting step 24 is also provided with a conical inclined surface so as to realize the fit with the shaft shoulder, and the limiting step 24 of the conical inclined surface has a certain function of restraining the sealing gasket 10 from centering; the specific form of the limiting step 24 can be flexibly set according to actual use requirements (e.g., whether the limiting step 24 is easy to process, whether the limiting step 24 needs to have a centering function, etc.).

As shown in fig. 1, the seal test fixture further includes a coupling 70 and a thrust pad 80, one end of the coupling 70 is connected with an external pressing device, and the other end is connected with the pressure rod 40 to transmit pressure; the thrust pad 80 is disposed between the coupling 70 and the pressure lever 40, the hardness and strength of the thrust pad 80 being not less than those of the pressure lever 40, the thrust pad 80 being for transmitting pressure. By providing the coupling 70, a reliable conduction of the pressure to the external pressing device is achieved; by setting the hardness and strength of the thrust pad 80 to be not less than those of the pressure rod 40, even if the pressure rod 40 is greatly deformed when the pressure rod 40 bears a large axial load, the deformation of the thrust pad 80 is still small, thereby ensuring the uniformity and reliability of pressure transmission.

As shown in fig. 1, the seal test tool further comprises a pressing plate assembly 90 and a pressing sleeve assembly 100, wherein one end of the pressing rod 40 sequentially passes through the pressing plate assembly 90 and the pressing sleeve assembly 100 and then extends into the mounting cavity 21; at least a portion of the press sleeve assembly 100 extends into the mounting cavity 21 to seal the mounting cavity 21, and the press plate assembly 90 is matched with the press sleeve assembly 100 and connected with the tool main body 20 to fixedly arrange the press sleeve assembly 100 between the press plate assembly 90 and the tool main body 20; the sealing gasket 10 is provided with a valve port 12, and the inner wall surface of the valve port 12 is a sealing surface 11; the platen assembly 90 has a locked state and an unlocked state; in the locked state, the pressure plate assembly 90 fixes the pressure rod 40, and the pressure rod 40 presses the sealing surface 11 with a certain pressure to close the valve port 12; in the released state, the pressure lever 40 is movable relative to the valve port 12 to repeatedly impact the sealing surface 11 with a certain pressure. By the arrangement, the locking state and the unlocking state can be reliably adjusted, and effective switching of different purposes of the test department is achieved.

It should be noted that: when a test of repeatedly impacting the sealing surface 11 is required (i.e. a fatigue durability test is performed on the sealing surface 11), the regulating platen assembly 90 is in a released state, and the pressure rod 40 can move relative to the valve port 12 and repeatedly impact the sealing surface 11 under a certain pressure; when the air tightness test of the sealing surface 11 is required to be performed by simulating the closing of the valve (namely, the reliability test is performed on the sealing surface 11), the pressure plate assembly 90 is adjusted to be in a locking state, and the pressure plate assembly 90 fixes the pressure rod 40, so that the pressure rod 40 can press on the sealing surface 11 according to the required pressure.

As shown in fig. 1, the platen assembly 90 includes a platen plate 91, a split ring 92, and a connector 93, and the platen plate 91 has a first through hole 911 inside; the pressure rod 40 passes through the first through hole 911, and the outer circumference of the pressure rod 40 is provided with a positioning ring groove 41; the split ring 92 is arranged in the first through hole 911, and the split ring 92 is in limit fit with the positioning ring groove 41; the connecting piece 93 is respectively connected with the crimping plate 91 and the tool main body 20; in the locked state, the connecting piece 93 fixes the pressing plate 91 on the tool main body 20, and the inner wall of the first through hole 911 abuts against the split ring 92 to fix the pressure rod 40; in the released state, the inner wall of the first through hole 911 is out of contact with the split ring 92, and the split ring 92 moves following the pressure lever 40; or in the released state, the platen assembly 90 is disengaged from the pressure bar 40. By the arrangement, the working reliability and the adjustability of the pressing plate assembly 90 are guaranteed, the structure of the pressing plate assembly 90 is simplified, and cost is effectively reduced.

It should be noted that: the platen assembly 90 may be unassembled when repeated testing of the impact seal face 11 is required (i.e., fatigue durability testing of the seal face 11), i.e., when the platen assembly 90 is completely disengaged and in contact with the pressure bar 40, to save installation and test preparation time.

As shown in fig. 1, the press sleeve assembly 100 includes a press sleeve 101, a second seal ring 102, and a third seal ring 103; the periphery of the press-fit sleeve 101 is in limit fit with the inner wall of the mounting cavity 21, a second through hole is formed in the press-fit sleeve 101, and the pressure rod 40 passes through the second through hole; the second sealing ring 102 is sleeved at one end of the crimping sleeve 101 extending into the mounting cavity 21 and is in abutting sealing fit with the inner wall of the mounting cavity 21; the third seal ring 103 is provided in the second through hole and is in sealing engagement with the outer periphery of the pressure rod 40. Through setting up second sealing washer 102, third sealing washer 103 respectively with crimping cover 101 cooperation work, furthest has guaranteed the holistic leakproofness of sealed test fixture, and then fluid leakage when having avoided the gas tightness test has guaranteed the security.

It should be noted that: as shown in fig. 2, in the second embodiment of the present utility model, the seal test tool has a simplified structure, the press sleeve assembly 100 is omitted, and a part of the press plate assembly 90 directly seals the mounting cavity 21; the inflow channel 22 and the outflow channel 23 which are communicated with the installation cavity 21 are simplified, so that only one channel which is communicated with the installation cavity 21 is provided, the technical scheme in the second embodiment realizes the structural simplification, of course, the second embodiment is compared with the first embodiment in fig. 1, the corresponding tightness is poorer, and only one channel which is communicated with the installation cavity 21 is provided, when the air tightness test of the sealing surface 11 is required to be performed by simulating the closing valve (namely, the reliability test is performed on the sealing surface 11), the pressure maintaining test can be performed only after the gas or the fluid is injected through the channel, the air tightness is tested by detecting the pressure change in the installation cavity, and the accuracy is lower; therefore, two embodiments are flexibly selected according to actual test requirements.

It should be noted that: in a specific embodiment of the present utility model, the partial assembly sequence of the seal test tool may be:

1. Firstly, the sealing gasket 10 is arranged in the mounting cavity 21, and then the fixing piece 30 provided with the first sealing ring 60 is screwed in from the bottom of the tool main body 20 and is screwed up through threaded fit;

2. The second sealing ring 102 and the third sealing ring 103 are respectively arranged on the crimping sleeve 101, and then the crimping sleeve 101 is arranged in the mounting cavity 21;

3. One end of the pressure rod 40 is movably installed in the installation cavity 21;

4. A thrust pad 80 is installed at the top end of the pressure rod 40, and then the coupling 70 is installed;

In addition, the split ring 92, the crimp sleeve 101 and the fitting 50 may be installed when it is necessary to simulate a valve for the tightness test of the sealing surface 11 (i.e., to perform a reliability test on the sealing surface 11), and may not be assembled when it is necessary to perform a repeated impact test on the sealing surface 11 (i.e., to perform a fatigue durability test on the sealing surface 11), in order to save time.

In summary, the utility model provides a seal test tool, in which the axial pressure is applied to the sealing surface 11 on the sealing gasket 10 by the pressure rod 40, and the axial loading force of the pressure rod 40 is used to replace the gas pressure in the existing mode; according to the utility model, certain pressure can be controlled by external pressure applying equipment and a pressure sensor to be transmitted to the pressure rod 40, and then the pressure rod 40 performs impact on the sealing surface 11 again and again, so that the fatigue life of the sealing surface 11 is tested, and the sealing performance of the sealing surface 11 is measured; compared with the existing sealing test mode, the utility model has the advantages of simple structure, low test cost, low test difficulty and low risk, and is convenient for the staff to test conveniently and rapidly; according to the utility model, the dwell time of the pressure rod 40 on the sealing surface 11 can be effectively adjusted according to the test requirement, and then fluid (gas or liquid) for test is introduced into the mounting cavity 21, and the tightness is further tested in a mode of simulating valve closing; the mode can completely replace the existing mode of directly testing by adopting a valve, and can finish the air tightness test of sealing surfaces 11 with different materials and different forms by flexibly setting the size of the mounting cavity 21, thereby effectively shortening the test time and reducing the test cost; the utility model can replace a valve to directly perform fatigue life verification of the sealing surface 11 of the sealing gasket 10; in actual use, the utility model can simulate the gas pressure of 90MPa for test; the utility model can test the sealing gaskets 10 with different materials and different structures by replacing the pressure rods 40 with different materials and different structures; the utility model has the advantages of simple structure, convenient operation, low processing difficulty, repeated test and low cost, and is suitable for large-scale popularization and use.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The utility model provides a seal test fixture, its characterized in that, seal test fixture is arranged in the leakproofness of sealing face (11) of sealing pad (10) in the test valve, includes:

The tool comprises a tool main body (20), wherein an installation cavity (21) is formed in the tool main body, and the sealing gasket (10) is in limit fit with the inner wall of the installation cavity (21);

the fixing piece (30) is detachably arranged on the tool main body (20); one end of the fixing piece (30) extends into the mounting cavity (21) and is abutted against one end of the sealing gasket (10) away from the sealing surface (11) so as to fix the sealing gasket (10) in the mounting cavity (21);

And a pressure rod (40) with one end movably arranged in the mounting cavity (21) and the other end connected with an external pressure applying device for applying axial pressure to the sealing surface (11) so as to test the sealing surface (11).

2. The seal testing tool according to claim 1, wherein the tool body (20) further has an inflow channel (22) and an outflow channel (23) communicating with the mounting cavity (21), respectively; wherein when the pressure rod (40) is in contact with the sealing surface (11), the communication between the inflow channel (22) and the outflow channel (23) is interrupted.

3. The sealing test fixture according to claim 2, wherein the sealing gasket (10) is provided with a valve port (12) and a flow channel (13) communicated with the valve port (12), and an end surface of the valve port (12) for abutting against the pressure rod (40) is the sealing surface (11); the inflow channel (22) is arranged on one side of the valve port (12) away from the direction of entering the valve port (12), the outflow channel (23) is communicated with the circulation channel (13), and the pressure rod (40) closes the valve port (12) to disconnect the communication between the inflow channel (22) and the valve port (12).

4. A sealing test fixture according to claim 3, characterized in that the valve port (12) is a conical port, the abutment end of the pressure rod (40) with the valve port (12) is a conical head, and the conical head is adapted to the conical port for closing the valve port (12).

5. A seal testing tool according to claim 3, further comprising two connectors (50), one of the connectors (50) being in communication with the inlet of the inflow channel (22) for accessing an external fluid source; the other of said connectors (50) communicates with the outlet of said outflow channel (23) for discharging the fluid.

6. The sealing test fixture according to claim 1, wherein the inner wall of the mounting cavity (21) is provided with a limiting step (24), and the limiting step (24) is abutted with the outer wall of the sealing gasket (10) so as to axially limit the sealing gasket (10); the sealing test tool further comprises a first sealing ring (60), wherein the first sealing ring (60) is sleeved at one end of the fixing piece (30) extending into the installation cavity (21) and is in butt fit with the inner wall of the installation cavity (21) so as to seal the installation cavity (21).

7. The seal testing tool according to claim 1, further comprising a coupling (70) and a thrust pad (80), wherein one end of the coupling (70) is connected to an external pressing device, and the other end is connected to the pressure rod (40) to transmit pressure; the thrust pad (80) is arranged between the coupler (70) and the pressure rod (40), the hardness and strength of the thrust pad (80) are not less than those of the pressure rod (40), and the thrust pad (80) is used for transmitting pressure.

8. The sealing test fixture according to claim 1, further comprising a pressure plate assembly (90) and a pressure sleeve assembly (100), wherein one end of the pressure rod (40) sequentially passes through the pressure plate assembly (90) and the pressure sleeve assembly (100) and then extends into the mounting cavity (21); at least one part of the pressing sleeve assembly (100) stretches into the mounting cavity (21) to seal the mounting cavity (21), and the pressing plate assembly (90) is matched with the pressing sleeve assembly (100) and connected with the tool main body (20) so as to fixedly arrange the pressing sleeve assembly (100) between the pressing plate assembly (90) and the tool main body (20); the sealing gasket (10) is provided with a valve port (12), and the end surface of the valve port (12) for abutting against the pressure rod (40) is the sealing surface (11); the platen assembly (90) has a locked state and an unlocked state; in the locked state, the pressure plate assembly (90) fixes the pressure rod (40), and the pressure rod (40) is pressed on the sealing surface (11) with a certain pressure so as to close the valve port (12); in the released state, the pressure lever (40) is movable relative to the valve opening (12) to repeatedly impact the sealing surface (11) with a certain pressure.

9. The seal testing tool according to claim 8, wherein the pressure plate assembly (90) comprises a pressure plate (91), a split ring (92) and a connecting piece (93), wherein the pressure plate (91) has a first through hole (911) inside; the pressure rod (40) passes through the first through hole (911), and a positioning ring groove (41) is formed on the periphery of the pressure rod (40); the split ring (92) is arranged in the first through hole (911), and the split ring (92) is in limit fit with the positioning ring groove (41); the connecting piece (93) is respectively connected with the crimping plate (91) and the tool main body (20);

Wherein, in the locking state, the connecting piece (93) fixes the crimping plate (91) on the tool main body (20), and the inner wall of the first through hole (911) is abutted with the split ring (92) so as to fix the pressure rod (40); in the released state, the inner wall of the first through hole (911) is out of contact with the split ring (92), the split ring (92) following the movement of the pressure rod (40); or in the released state, the pressure plate assembly (90) is disengaged from the pressure bar (40).

10. The seal testing tool according to claim 8, wherein the press sleeve assembly (100) comprises a press sleeve (101), a second sealing ring (102) and a third sealing ring (103); the periphery of the pressure welding sleeve (101) is in limit fit with the inner wall of the mounting cavity (21), a second through hole is formed in the pressure welding sleeve (101), and the pressure rod (40) penetrates through the second through hole; the second sealing ring (102) is sleeved at one end of the press-connection sleeve (101) extending into the mounting cavity (21) and is in butt sealing fit with the inner wall of the mounting cavity (21); the third seal ring (103) is arranged in the second through hole and is in seal fit with the outer periphery of the pressure rod (40).