Sealing performance detection device

Abstract

The utility model relates to the technical field of sealing detection equipment, and discloses a sealing performance detection device, which comprises a base, a gland and a load applying assembly. The gland and the base tightly press the sealing gasket in the detection gap, gas or liquid enters the through hole from the pipeline and is output to the detection gap from the through hole, and the sealing gasket is in the detection gap, so that the gas or the liquid cannot be smoothly output from the detection gap, and the sealing performance of the sealing gasket is judged. For the sealing gasket which can only have the sealing function by applying pressure, or when the sealing performance of the sealing gasket in different pressure states needs to be detected, the load applying assembly is operated, the load is applied to the sealing gasket, so that the sealing gasket is in the pressure state, and at the moment, the sealing performance of the sealing gasket is judged by using the mode again. The device can detect various types of sealing gaskets, can detect the sealing performance of the sealing gaskets in different pressure states, and is wide in application range.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing detection equipment, in particular to a sealing performance detection device. Background Art

[0002] Sealing gaskets are essential components in a variety of mechanical equipment. For example, solid oxide fuel cell stacks are mainly composed of single cells and connectors in series. The operating temperature is between 600°C and 850°C. High-temperature sealing gaskets are applied to achieve the dual functions of sealing and insulation between single cells and connectors. To ensure the normal operation of solid oxide fuel cells, sealing gaskets must provide sufficient airtightness. Therefore, before using the sealing gasket, its sealing performance needs to be tested.

[0003] The patent with the announcement number CN215178593U discloses a rubber sealing ring air tightness detection device, including a base, a mounting tube, a detection tube, a sealing cover, a sealing ring to be detected and an inflating device, wherein the detection tube is mounted on the upper end surface of the base, the mounting tube is arranged in the detection tube, the sealing ring to be detected covers the first opening at the upper end of the mounting tube, the sealing cover covers the first opening, and an inflating device is arranged in the base. First, the gas is filled into the mounting tube by the inflating device, and when the gas leaks from the sealing ring, the gas detection sensor can detect the leaked gas. This detection device detects the sealing performance of the sealing ring by gas, but currently also includes a sealing gasket that needs to apply a load to achieve the sealing function, that is, a predetermined load is applied to the sealing gasket to make it have a sealing function, such as a sealing gasket made of mica material, or the sealing performance varies with the applied load. For the detection of the sealing performance of such a sealing gasket, the above patent cannot be realized, and the scope of application is limited. Utility Model Content

[0004] The purpose of the utility model is to overcome the problem in the prior art that the sealing performance of a sealing gasket under different load amounts cannot be detected, and to provide a sealing performance detection device, which has the function of providing different load amounts for the sealing gasket to detect the sealing performance of the sealing gasket under different load amounts.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a sealing performance detection device on the one hand, including: a base, a through hole is opened on the base; a pressure cover, the pressure cover is arranged on one side of the base, a detection gap is formed between the pressure cover and the base, so that the sealing gasket to be detected can be pressed into the detection gap, and the through hole is connected to the detection gap so that gas or liquid can be introduced into the detection gap through the through hole; and a load applying assembly, the load applying assembly is configured to be able to apply different load amounts to the sealing gasket located in the detection gap through the pressure cover.

[0006] Preferably, the sealing performance testing device also includes a frame, and the load applying assembly is movably connected to the frame to change the load applied to the gland with the help of the frame; and / or, the sealing performance testing device also includes a pipeline connected to the through hole for introducing gas or liquid.

[0007] Preferably, a threaded hole is formed on the frame, and the load applying assembly includes a pressure piece, on which an external thread threadedly connected to the threaded hole is formed, so that the load applied to the gland can be changed by driving the pressure piece to rotate.

[0008] Preferably, the pressure piece includes an operating section, a threaded section and a head which are connected in sequence, the threaded section is threadedly connected to the threaded hole so that the operating section protrudes outside the outline of the frame, the head is located between the threaded hole and the pressure cover, and the bottom end of the head is spherical.

[0009] Preferably, the load applying assembly further comprises a force transmitting member, through which the pressure applying member applies the load to the pressure cover, and an arc-shaped groove is formed on the force transmitting member for the head to be embedded.

[0010] Preferably, the force transmission member comprises a sleeve section and a connecting section which are connected to each other, the connecting section is detachably connected to the gland, and a groove is formed on a surface of the connecting section facing the sleeve section.

[0011] Preferably, the load applying assembly also includes a pressure member for applying a load to the pressure cover and a first pressure sensor arranged between the pressure member and the pressure cover, the pressure cover includes a containing ring and a bearing plate connected to each other, the first pressure sensor is partially located inside the containing ring and placed on the bearing plate.

[0012] Preferably, a positioning hole is formed through the accommodating ring, so as to define the installation position of the first pressure sensor by a positioning rod passing through the positioning hole.

[0013] Preferably, the pressure cover is arranged above the base, the containing ring and the supporting plate are arranged in sequence from top to bottom, the lower surface of the supporting plate has a first protrusion protruding vertically downward, and a detection gap is formed between the first protrusion and the pressure cover; and / or, the base includes a supporting plate and a supporting frame connected to each other.

[0014] Preferably, the base is arranged below the pressure cover, the support plate and the support frame are arranged in sequence from top to bottom, the through hole is opened on the support plate, and a second protrusion protrudes vertically upward from the upper surface of the support plate, and a detection gap is formed between the second protrusion and the supporting plate.

[0015] Through the above technical solution, the gland and the base press the sealing gasket into the detection gap, and the gas or liquid enters the through hole from the pipeline and is output from the through hole to the detection gap. Since the sealing gasket is in the detection gap, the gas or liquid cannot be smoothly output from the detection gap. The operator can use a pressure detector or other detectors to detect whether the gas or liquid leaks from the detection gap, so as to determine the sealing performance of the sealing gasket. For sealing gaskets that need to apply a load to have a sealing function, or when it is necessary to detect the sealing performance of the sealing gasket under different load states, operate the load application component to apply a load to the sealing gasket, so that the sealing gasket is in a pressure state, so as to determine the sealing performance of the sealing gasket under different loads. This device can detect various types of sealing gaskets, and can detect the sealing performance of sealing gaskets under different loads, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the sealing performance detection device of the utility model;

[0017] Figure 2 yes Figure 1 Schematic diagram of the structure from another angle;

[0018] Figure 3 yes Figure 1 A longitudinal section of

[0019] Figure 4 yes Figure 3 A partial enlarged view of middle A;

[0020] Figure 5 yes Figure 3 Schematic diagram of the structure from another angle;

[0021] Figure 6 It is a longitudinal cross-sectional view of the cooperation between the pressure applying member and the force transmitting member of the load applying assembly of the sealing performance testing device;

[0022] Figure 7 is a schematic structural diagram of a pressure-applying member of a load-applying assembly;

[0023] Figure 8 is a schematic diagram of the structure of the force transmission member of the load application assembly;

[0024] Fig. 9 yes Figure 8 A cross-sectional view in one direction;

[0025] Fig.10 is a schematic structural diagram of a first pressure sensor of a load applying assembly;

[0026] Fig.11 yes Fig.10 A longitudinal section of

[0027] Fig.12 It is a structural schematic diagram of a gland of a sealing performance testing device;

[0028] Fig.13 yes Fig.10 Schematic diagram of the structure from another angle;

[0029] Fig.14 It is a schematic diagram of the structure of the base, pipeline and sealing gasket of the sealing performance testing device;

[0030] Fig.15 is a schematic diagram of the base and piping structure; and

[0031] Fig.16 It is a structural schematic diagram of the framework of the sealing performance testing device.

[0032] Description of Reference Numerals

[0033] 10. pipeline; 20. base; 21. support plate; 211. through hole; 22. support frame; 221. mounting hole; 23. second protrusion; 30. gland; 31. accommodating ring; 311. positioning hole; 312. avoidance groove; 32. bearing plate; 33. first protrusion; 40. load applying assembly; 41. pressure applying member; 411. operating section; 412. threaded section; 413. head; 42. first pressure sensor; 421. cable; 422. connecting hole; 43. force transmitting member; 431. sleeve section; 432. connecting section; 433. slot; 434. groove; 50. frame; 51. top plate; 511. threaded hole; 52. vertical frame; 53. bottom plate; 54. connecting plate; 61. ball valve; 62. pressure reducing valve; 63. needle valve; 71. pressure gauge; 72. second pressure sensor; 90. sealing gasket. DETAILED DESCRIPTION

[0034] In the present invention, unless otherwise specified, the directional words such as "upper" and "lower" generally refer to the upper and lower directions shown in the drawings. "Inside" and "outside" refer to the inside and outside of the outline of a component.

[0035] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0036] See also Figures 1 to 5As shown, the utility model provides a sealing performance detection device, including: a base 20, a through hole 211 is opened on the base 20; a pressure cover 30, the pressure cover 30 is arranged on one side of the base 20, and a detection gap is formed between the pressure cover 30 and the base 20, so that the sealing gasket 90 to be detected can be pressed into the detection gap through the through hole 211, and the through hole 211 is connected to the detection gap to allow gas or liquid to pass into the detection gap; and a load applying assembly 40, the load applying assembly 40 is configured to be able to apply different load amounts to the sealing gasket 90 located in the detection gap through the pressure cover 30.

[0037] In this embodiment, for the sealing gasket 90 whose sealing performance under different load amounts needs to be tested, the sealing gasket 90 to be tested is first placed in the testing gap, and the sealing gasket 90 is pressed into the testing gap through the pressure cover 30 and the base 20, and then gas or liquid is introduced into the through hole 211. According to the pressure of the gas or liquid introduced into the through hole 211, the load applying component 40 is operated to apply different load amounts to the pressure cover 30 through the load applying component 40, and applied to the sealing gasket 90 through the pressure cover 30, and the pressure of the gas or liquid in the through hole 211 is tested again to determine the sealing performance of the sealing gasket 90 under different load amounts; the load amount applied to the sealing gasket 90 can be changed through the load applying component 40 to determine the sealing performance of the sealing gasket 90 under different load amounts. In addition, for the sealing gasket 90 that does not need to be tested for sealing performance under different loads, the load applying assembly 40 may not be used, and the sealing gasket 90 is only pressed into the testing gap through the gland 30 and the base 20, and the sealing performance of the sealing gasket 90 is determined by the pressure of the gas or liquid in the through hole 211. The sealing performance testing device can test various types of sealing gaskets 90, including ordinary sealing gaskets 90, sealing gaskets 90 that need to apply loads to achieve the sealing function, and sealing gaskets 90 with different sealing performance under different loads, and has a wide range of applications.

[0038] Specifically, the sealing gasket 90 to be tested is annular, and the through hole 211 is located below the annular hole of the sealing gasket 90 . Preferably, the through hole 211 is coaxial with the sealing gasket 90 .

[0039] Specifically, the sealing performance testing device can be used to test the sealing performance of the sealing material in the fuel cell, and test the sealing performance of the sealing gasket 90 from low load to high load through the load applying component 40, so as to screen out the most suitable sealing material for the fuel cell. During the actual testing process, the corresponding sealing material is used to make the sealing gasket 90 for testing.

[0040] See also Figures 1 to 5 As shown, in some embodiments of the present invention, the sealing performance detection device further includes a pipe 10 connected to the through hole 211 for passing gas or liquid.

[0041] In this embodiment, the pipe 10 is used to introduce gas or liquid into the through hole 211 , and then introduce the gas or liquid into the detection gap through the through hole 211 .

[0042] Specifically, one end of the pipeline 10 away from the through hole 211 is connected to a liquid source or a gas source. Gas is preferably introduced into the pipeline 10 so that the sealing performance detection device can be used exclusively for detecting the air tightness of the sealing gasket 90. The pipeline 10 includes a first pipe section, a second pipe section and a third pipe section that are connected in sequence. The two ends of the first pipe section are respectively an air inlet and an air outlet, and the second pipe section is connected to the through hole 211. A ball valve 61, a pressure reducing valve 62 and a needle valve 63 are sequentially arranged on the first pipe section along the flow direction of the gas. The connection node between the first pipe section and the second pipe section is located between the pressure reducing valve 62 and the needle valve 63. The ball valve 61 is used to allow or block the gas of the gas source from entering the first pipe section. The pressure reducing valve 62 is used to reduce the pressure of the gas in the first pipe section, thereby reducing the pressure of the gas entering the second pipe section. The needle valve 63 is used to release the gas in the pipeline 10 after the sealing detection is completed. The third pipe section is provided with a pressure gauge 71 and a second pressure sensor 72. The pressure gauge 71 is used to detect and display in real time the pressure of the gas in the pipeline 10, and further display in real time the pressure of the gas in the detection gap, so as to determine whether there is a gas leakage in the detection gap. The second pressure sensor 72 is also used to detect the pressure of the gas in the pipeline 10. Different from the pressure gauge 71, the second pressure sensor 72 is used to communicate with a computer terminal so as to display the pressure of the gas in the detection gap through the computer terminal.

[0043] See also Figures 1 to 5 , Fig.16 As shown, in some embodiments of the present invention, the sealing performance detection device further includes a frame 50 , and the load applying assembly 40 is movably connected to the frame 50 , so as to change the load applied to the gland 30 with the help of the frame 50 .

[0044] In this embodiment, the frame 50 is used to provide a support point for the load applying assembly 40 so that the load applying assembly 40 can apply force.

[0045] See also Figures 1 to 5 , Fig.16 As shown, in some embodiments of the utility model, a threaded hole 511 is opened on the frame 50, and the load applying assembly 40 includes a pressure member 41, and an external thread is formed on the pressure member 41 and is threadedly connected to the threaded hole 511, so that the load applied to the pressure cover 30 can be changed by driving the pressure member 41 to rotate.

[0046] In this embodiment, the pressure member 41 rotates relative to the frame 50, and the distance between the pressure member 41 and the gland 30 is changed by the cooperation of the screw thread between the pressure member 41 and the threaded hole 511. When the distance between the two decreases, the load applied by the pressure member 41 to the gland 30 increases, that is, the load applied to the gasket 90 increases; when the distance between the two increases, the load applied by the pressure member 41 to the gland 30 decreases, that is, the load applied to the gasket 90 decreases. Through the threaded connection between the pressure member 41 and the frame 50, on the one hand, the rotation of the pressure member 41 makes the adjustment method more convenient and quick, and the controllability is strong; on the other hand, every time the pressure member 41 rotates an angle, the screw thread between the pressure member 41 and the threaded hole 511 can be locked in the length direction of the pressure member 41, preventing the pressure member 41 from moving relative to the gland 30 in its length direction, so as to keep the load applied to the gasket 90 at a predetermined load. In addition, dense external threads can be provided on the pressure piece 41 and matched with a threaded hole 511 with dense internal threads, so that the pressure piece 41 can be rotated by a small angle and the pressure applied to the sealing gasket 90 can be adjusted to achieve fine-tuning, thereby increasing the range of load values ​​that can be applied to the sealing gasket 90, thereby further increasing the scope of application of the present sealing performance testing device.

[0047] Specifically, the frame 50 includes a top plate 51, a vertical frame 52 and a bottom plate 53 which are arranged in sequence from top to bottom. A threaded hole 511 is opened on the top plate 51. Both the top plate 51 and the bottom plate 53 are square. There are four vertical frames 52, and the four vertical frames 52 are respectively fixed at the four corners of the top plate 51 and the bottom plate 53. The vertical frames 52 can form a accommodating space between the top plate 51 and the bottom plate 53 to accommodate the base 20, the pressure cover 30 and part of the load application assembly 40, and a gap is formed between each vertical frame 52 to provide an operating space for the operator to place the sealing gasket 90. The frame 50 also includes two connecting plates 54, one of which is fixed between the adjacent first vertical frame 52 and the second vertical frame 52, and is used to fix the ball valve 61, the pressure reducing valve 62 and the needle valve 63, and the other connecting plate 54 is fixed between the adjacent second vertical frame 52 and the third vertical frame 52, and is used to fix the pressure gauge 71 and the second pressure sensor 72, and the connecting plate 54 is perpendicular to the vertical plate.

[0048] See also Figures 1 to 7 As shown, in some embodiments of the utility model, the pressure member 41 includes an operating section 411, a threaded section 412 and a head 413 which are connected in sequence, the threaded section 412 is threadedly connected to the threaded hole 511 so that the operating section 411 protrudes outside the outline of the frame 50, the head 413 is located between the threaded hole 511 and the pressure cover 30, and the bottom end of the head 413 is spherical.

[0049] In this embodiment, the driving operating section 411 rotates, causing the threaded section 412 to rotate. The spherical setting at the bottom of the head 413 allows the rotation of the head 413 to not interfere with the rotation of the threaded section 412, while being able to apply a load to the pressure cover 30.

[0050] Specifically, the pressure member 41 is rod-shaped. The operating section 411 is a rectangular parallelepiped structure, which is screwed by an external tool, such as a ratchet torque wrench with a sleeve.

[0051] See also Figures 1 to 9 As shown, in some embodiments of the present invention, the load applying assembly 40 further includes a force transmitting member 43, and the pressure applying member 41 applies the load to the pressure cover 30 through the force transmitting member 43. An arc-shaped groove 434 is formed on the force transmitting member 43 for the head 413 to be embedded.

[0052] In this embodiment, the force transmission member 43 is in direct contact with the pressure member 41 to transmit the load of the pressure member 41 to the gland 30. The bottom end of the head 413 is embedded in the groove 434, and the threaded section 412 rotates, driving the head 413 to rotate in the groove 434. The groove wall of the groove 434 fits with the wall surface of the head 413, so that the force transmission member 43 and the head 413 form a surface contact, reducing the pressure applied by the head 413 to the force transmission member 43, thereby reducing the reaction force of the head 413 from the force transmission member 43, and protecting both the head 413 and the force transmission member 43.

[0053] See also Figures 1 to 9 As shown, in some embodiments of the present invention, the force transmission member 43 includes a sleeve section 431 and a connecting section 432 connected to each other, the connecting section 432 is detachably connected relative to the pressure cover 30, and a groove 434 is formed on the surface of the connecting section 432 facing the sleeve section 431.

[0054] In this embodiment, the interior of the sleeve section 431 is used to accommodate part of the threaded section 412, and is used to guide and limit the movement path of the threaded section 412 to avoid deviation of the movement of the threaded section 412, thereby avoiding deviation of the force application point of the pressure member 41 on the pressure cover 30, thereby ensuring that each position of the sealing gasket 90 can withstand a uniform load; in addition, the external force applied to the pressure member 41 is transmitted along its axial direction, and the force that the pressure member 41 can withstand in this direction is the largest, thereby avoiding the direction of the force applied to the pressure member 41 deviating from its axial direction, thereby avoiding damage or bending of the pressure member 41 under the action of external force.

[0055] Specifically, the inner diameter of the sleeve section 431 may be larger than the diameter of the threaded section 412, so that the threaded section 412 does not contact the inner wall of the sleeve section 431, thereby preventing the sleeve section 431 from interfering with the rotation of the threaded section 412. The groove 343 is provided at the center of the upper surface of the connecting section.

[0056] See also Figures 1 to 13 As shown, in some embodiments of the present invention, the load applying assembly 40 also includes a pressure member 41 for applying a load to the pressure cover 30 and a first pressure sensor 42 arranged between the pressure member 41 and the pressure cover 30, the pressure cover 30 includes a containing ring 31 and a supporting plate 32 connected to each other, and the first pressure sensor 42 is partially located inside the containing ring 31 and placed on the supporting plate 32.

[0057] In this embodiment, the first pressure sensor 42 is used to detect the load applied by the pressure member 41 to the gland 30, that is, the load applied by the pressure member 41 to the sealing gasket 90, so as to determine the values ​​of different loads corresponding to different sealing performances of the sealing gasket 90. The accommodating ring 31 is used to provide a accommodating space for the first pressure sensor 42 and to limit the first pressure sensor 42, so that when the first pressure sensor 42 is subjected to the pressure applied by the pressure member 41, it always moves vertically downward, that is, in the same direction as the movement of the pressure member 41, to ensure the accuracy of the load detected by the first pressure sensor 42. The bearing plate 32 is used to provide support for the first pressure sensor 42, and the lower surface of the first sensor is completely in contact with the upper surface of the bearing plate 32, to ensure that the pressure of the pressure member 41 can be stably and evenly transmitted to the sealing gasket 90 through the first pressure sensor 42.

[0058] Specifically, the first pressure sensor 42 is used to connect to the computer terminal to display the load amount applied by the pressure member 41 to the sealing gasket 90 through the computer terminal, and at the same time, the pressure value detected by the computer terminal and the second pressure sensor 72 together generate a pressure-load curve, so as to determine the applicable working conditions of the sealing gasket 90, and thereby ensure that the sealing gasket 90 can reach the longest service life. The first pressure sensor 42 is connected to a cable 421 for connecting a power source or other devices, and the accommodating ring 31 is provided with an avoidance groove 312 for the cable 421 to pass through.

[0059] Specifically, a connecting hole 422 is provided through the center of the first pressure sensor 42, an internal thread is formed on the inner wall of the connecting hole 422, and an external thread for threaded connection to the connecting hole 422 is formed on the wall of the connecting section 432. The threaded connection method makes disassembly and assembly convenient and fast, and the connection is stable. The first pressure sensor 42 uses the type of pressure sensor that has a connecting hole 422, and there is no need to modify the pressure sensor, saving costs. The outer wall of the sleeve section 431 is provided with two square card slots 433, and the two card slots 433 are arranged opposite to each other, so that the connecting section 432 can be screwed into or out of the connecting hole 422 of the first pressure sensor 42 by inserting an external tool (such as pliers) into the card slot 433.

[0060] See also Figures 1 to 13As shown, in some embodiments of the present invention, a positioning hole 311 is formed through the accommodating ring 31 , so as to define the installation position of the first pressure sensor 42 by a positioning rod passing through the positioning hole 311 .

[0061] In this embodiment, when the first pressure sensor 42 is partially located in the containing ring 31, the wall surface of the first pressure sensor 42 does not contact the wall surface of the containing ring 31. In order to enable the first pressure sensor 42 to be positioned at the inner center of the containing ring 31, a positioning rod is passed through the positioning hole 311 and then pressed against the first pressure sensor 42 to position the first pressure sensor 42, thereby preventing the first pressure sensor 42 from shifting in the horizontal direction.

[0062] Specifically, the positioning holes 311 are evenly spaced along the circumference of the receiving ring 31. The positioning holes 311 are horizontally opened on the wall surface of the receiving ring 31. The positioning holes 311 may be screw holes, and the positioning rods may be screws.

[0063] See also Figures 1 to 15 As shown, in some embodiments of the utility model, the pressure cover 30 is arranged above the base 20, and the containing ring 31 and the supporting plate 32 are arranged in sequence from top to bottom. The lower surface of the supporting plate 32 has a first protrusion 33 protruding vertically downward, and a detection gap is formed between the first protrusion 33 and the pressure cover 30.

[0064] In this embodiment, the pressure member 41 applies the load to the gland 30 from top to bottom, and transmits the load to the gasket 90 through the gland 30. The first protrusion 33 is used to fit on the upper surface of the gasket 90. The roughness requirement of the first protrusion 33 is higher than the roughness requirement of the bottom surface of the carrier plate 32 to ensure that the best sealing performance of the gasket 90 can be detected. In addition, the larger the contact area between the first protrusion 33 and the gasket 90, the higher the roughness requirement for the first protrusion 33. In order to avoid excessively high roughness requirements, the first protrusion 33 is set to a size with a small contact area with the gasket 90.

[0065] Specifically, the carrying plate 32 is a circular plate, and the first protrusion 33 is a circular protrusion, which is disposed at the center of the carrying plate 32 .

[0066] See also Figures 1 to 15 As shown, in some embodiments of the present invention, the base 20 includes a support plate 21 and a support frame 22 that are connected to each other.

[0067] In this embodiment, the support frame 22 is used to connect with the bottom plate 53 of the frame 50 and to raise the support plate 21 to provide sufficient space for the arrangement of the pipeline 10 so as to facilitate the pipeline 10 to communicate with the through hole 211 from below the through hole 211.

[0068] Specifically, the support frame 22 includes a cylindrical structure at the top and a circular plate structure at the bottom. The cylindrical structure of the support frame 22 is provided with a mounting hole 221 for the pipeline 10 to pass through. The second pipe section of the pipeline 10 passes through the mounting hole 221 and is connected with the through hole 211; the circular plate structure of the support frame 22 fits with the bottom plate 53 of the frame 50 to increase the connection area between the two and ensure the stability of the base 20. A plurality of holes for detachably connecting to the bottom plate 53 of the frame 50 are provided on the circular plate structure at intervals along the circumferential direction.

[0069] See also Figures 1 to 15 As shown, in some embodiments of the utility model, the base 20 is arranged below the pressure cover 30, the support plate 21 and the support frame 22 are arranged in sequence from top to bottom, the through hole 211 is opened on the support plate 21, and the upper surface of the support plate 21 protrudes vertically upward with a second protrusion 23, and a detection gap is formed between the second protrusion 23 and the supporting plate 32.

[0070] In this embodiment, the second protrusion 23 is used to fit the lower surface of the sealing gasket 90. The roughness requirement of the second protrusion 23 is higher than the roughness requirement of the upper surface of the support plate 21 to ensure that the best sealing performance of the sealing gasket 90 can be detected. In addition, the larger the contact area between the second protrusion 23 and the sealing gasket 90, the higher the roughness requirement for the second protrusion 23. In order to avoid excessively high roughness requirements, the second protrusion 23 is set to a size with a small contact area with the sealing gasket 90.

[0071] Specifically, a detection gap is formed between the first protrusion 33 and the second protrusion 23, and the sealing gasket 90 protrudes circumferentially from the first protrusion 33 and the second protrusion 23. The gas entering the detection gap from the through hole 211 intends to flow to the edge of the detection gap. Since the gas is blocked by the sealing gasket 90 at the edge, the gas cannot flow out of the detection gap, so as to determine the sealing performance of the sealing gasket 90. The support plate 21 is a circular plate, and the second protrusion 23 is a circular protrusion, which is arranged at the center of the support plate 21. The through hole 211 is opened at the center of the support plate 21, and the through hole 211 is coaxial with the second protrusion 23. The centers of the pressure member 41, the force transmission member 43, the first pressure sensor 42, the gland 30 and the base 20 are located on the same vertical line, so that the pressure member 41 can apply the load to the center of the gland 30, and then to the center of the sealing gasket 90, so that the sealing gasket 90 is uniformly stressed in the circumferential direction.

[0072] In combination with the illustrated embodiment, the use of the sealing performance detection device is as follows:

[0073] The sealing gasket 90 is placed in the detection gap between the first protrusion 33 and the second protrusion 23 to ensure that the sealing gasket 90 is coaxial with the through hole 211 to the greatest extent;

[0074] Open the ball valve 61 to allow the gas to enter the first pipe section of the pipeline 10;

[0075] The pressure of the gas entering the through hole 211 is adjusted to a predetermined value by the pressure reducing valve 62;

[0076] Observe the value displayed by the pressure gauge 71 in real time;

[0077] The pressure member 41 is screwed to move vertically downward in sequence, and the force transmission member 43, the first pressure sensor 42 and the gland 30 are driven to move vertically downward in sequence, so as to change the load applied to the sealing gasket 90. At the same time, the pressure value detected by the second pressure sensor 72 is combined with the load detected by the first pressure sensor 42 through the computer terminal to generate a pressure-load curve;

[0078] After the sealing performance test of the sealing gasket 90 is completed, the screwing of the pressure member 41 is stopped;

[0079] Open the needle valve 63 to discharge the gas in the pipeline 10. The sealing performance test is completed.

[0080] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A sealing performance detection device, characterized in that: include: A base (20), wherein a through hole (211) is formed on the base (20); A gland (30), the gland (30) being arranged on one side of the base (20), a detection gap being formed between the gland (30) and the base (20) so that a sealing gasket (90) to be detected can be pressed tightly into the detection gap, and the through hole (211) is connected to the detection gap so that gas or liquid can be introduced into the detection gap through the through hole (211); as well as A load applying assembly (40) is configured to apply different load amounts to the sealing gasket (90) located in the detection gap through the pressure cover (30).

2. The sealing performance detection device according to claim 1, characterized in that: The sealing performance detection device further comprises a frame (50), and the load applying assembly (40) is movably connected to the frame (50) so as to change the load applied to the gland (30) by means of the frame (50); and / or, The sealing performance detection device further comprises a pipeline (10) connected to the through hole (211) for passing gas or liquid.

3. The sealing performance detection device according to claim 2, characterized in that: The frame (50) is provided with a threaded hole (511), and the load applying assembly (40) includes a pressure piece (41), and the pressure piece (41) is formed with an external thread threadedly connected to the threaded hole (511), so that the load applied to the pressure cover (30) can be changed by driving the pressure piece (41) to rotate.

4. The sealing performance detection device according to claim 3, characterized in that: The pressure-applying member (41) comprises an operating section (411), a threaded section (412) and a head (413) which are connected in sequence, wherein the threaded section (412) is threadedly connected to the threaded hole (511) so that the operating section (411) protrudes outside the outline of the frame (50), and the head (413) is located between the threaded hole (511) and the pressure cover (30), and the bottom end of the head (413) is spherical.

5. The sealing performance detection device according to claim 4, characterized in that: The load applying assembly (40) further comprises a force transmitting member (43), through which the pressure applying member (41) applies a load to the pressure cover (30), and an arc-shaped groove (434) is formed on the force transmitting member (43) for the head (413) to be embedded.

6. The sealing performance detection device according to claim 5, characterized in that: The force transmission member (43) comprises a sleeve section (431) and a connecting section (432) which are connected to each other. The connecting section (432) is detachably connected to the gland (30), and the surface of the connecting section (432) facing the sleeve section (431) is formed with the groove (434).

7. The sealing performance detection device according to claim 1, characterized in that: The load applying assembly (40) further comprises a pressure member (41) for applying a load to the pressure cover (30) and a first pressure sensor (42) arranged between the pressure member (41) and the pressure cover (30), wherein the pressure cover (30) comprises a receiving ring (31) and a bearing plate (32) connected to each other, wherein the first pressure sensor (42) is partially located inside the receiving ring (31) and is placed on the bearing plate (32).

8. The sealing performance detection device according to claim 7, characterized in that: The accommodating ring (31) is provided with a positioning hole (311) for defining the installation position of the first pressure sensor (42) by means of a positioning rod passing through the positioning hole (311).

9. The sealing performance detection device according to claim 7, characterized in that: The pressure cover (30) is arranged above the base (20), the containing ring (31) and the bearing plate (32) are arranged in sequence from top to bottom, the lower surface of the bearing plate (32) has a first protrusion (33) protruding vertically downward, and the detection gap is formed between the first protrusion (33) and the pressure cover (30); and / or, The base (20) comprises a supporting plate (21) and a supporting frame (22) which are connected to each other.

10. The sealing performance detection device according to claim 9, characterized in that: The base (20) is arranged below the pressure cover (30), the support plate (21) and the support frame (22) are arranged in sequence from top to bottom, the through hole (211) is opened on the support plate (21), and a second protrusion (23) protrudes vertically upward on the upper surface of the support plate (21), and the detection gap is formed between the second protrusion (23) and the supporting plate (32).

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