Sealing performance test equipment

Abstract

The present application provides a sealing performance test device, including a shell, a fixing mechanism and a detection member; the shell is used to accommodate the fixing mechanism, and an abutment portion is formed in the shell, and the abutment portion is used to abut against the outer side of the sealing ring; the fixing mechanism includes a center rod, a plurality of fixing blocks and a driving assembly, the center rod extends along a first direction, and the plurality of fixing blocks are evenly arranged along the circumference of the center rod; the driving assembly is used to drive the plurality of fixing blocks to move radially along the center rod so that the fixing blocks abut against the inner side of the sealing ring; when the abutment portion abuts against the outer side of the sealing ring, and the plurality of fixing blocks abut against the inner side of the sealing ring, a test chamber and a detection chamber are formed in the shell, the test chamber and the detection chamber are arranged along the first direction, the test chamber is filled with a test fluid, and the sealing ring separates the test chamber from the detection chamber; the detection member is used to detect the test fluid in the detection chamber. The present application solves the problem of complex test process and low test efficiency of the sealing performance of the sealing ring.

Description

Technical Field

[0001] The present application relates to the field of seals, and in particular to a sealing performance testing device. Background Art

[0002] Seals are materials or parts that prevent fluids or solid particles from leaking between adjacent joint surfaces, and prevent impurities such as dust and moisture from invading machine parts. Sealing rings are a common type of seal, widely used in defense, chemical, petroleum, and machinery manufacturing industries.

[0003] Sealing performance is one of the performance indicators of the sealing ring. Currently, a variety of test equipment must be used in conjunction to test the sealing performance of the sealing ring, which results in a complicated testing process and low test efficiency. Summary of the invention

[0004] The embodiments of the present application provide sealing performance testing equipment to solve the problems of complex testing process and low testing efficiency of the sealing performance of the sealing ring.

[0005] The sealing performance test equipment provided in the embodiment of the present application includes a housing, a fixing mechanism and a detection member;

[0006] The housing is used to accommodate the fixing mechanism, and an abutment portion is formed in the housing, and the abutment portion is used to abut against the outer side of the sealing ring;

[0007] The fixing mechanism comprises a central rod, a plurality of fixing blocks and a driving assembly, wherein the central rod extends in a first direction, and the plurality of fixing blocks are evenly arranged along the circumference of the central rod; the driving assembly is used to drive the plurality of fixing blocks to move along the radial direction of the central rod so that the fixing blocks abut against the inner side of the sealing ring;

[0008] When the abutting portion abuts against the outer side of the sealing ring, and the plurality of fixed blocks abut against the inner side of the sealing ring, a test chamber and a detection chamber are formed in the shell, the test chamber and the detection chamber are arranged along the first direction, and the test chamber is filled with a test fluid, the sealing ring is located between the test chamber and the detection chamber to separate the test chamber from the detection chamber; the detection member is used to detect the test fluid in the detection chamber.

[0009] By adopting the above technical scheme, when the sealing performance of the sealing ring is tested by using the sealing performance testing equipment, the sealing ring is installed on the outside of the multiple fixed blocks, and then the driving assembly is used to drive the multiple fixed blocks to move radially along the center rod, so that the multiple fixed blocks are all abutted against the inner side of the sealing ring, and the abutting part is abutted against the outer side of the sealing ring, so that a test chamber and a detection chamber can be formed in the shell, and the test chamber is filled with a test fluid. The sealing ring is located between the test chamber and the detection chamber, and the test chamber is separated from the detection chamber, so that the test fluid in the test chamber does not flow into the detection chamber, so that when the detection element is used to detect the test fluid in the detection chamber, the sealing performance of the sealing ring can be determined by parameters such as the concentration of the test fluid in the detection chamber, thereby solving the problem of complex testing process and low test efficiency of the sealing performance of the sealing ring.

[0010] It is further configured that the driving assembly includes a guide plate, a driving member and a plurality of connecting rods;

[0011] The guide plate is arranged in the housing, and the guide plate is used to connect the plurality of fixing blocks so that the plurality of fixing blocks can slide along the radial direction of the central rod;

[0012] The driving member is sleeved on the central rod and can move on the central rod along the first direction;

[0013] The plurality of connecting rods are arranged in one-to-one correspondence with the plurality of fixing blocks, and the first end of the connecting rod is rotatably connected to the driving member, and the second end of the connecting rod is rotatably connected to the corresponding fixing block.

[0014] It is further configured that the driving assembly also includes a rotating head, which is threadedly connected to the central rod; and the driving member is rotatable around the first direction and is connected to the rotating head.

[0015] It is further configured that a guide portion is also provided on the guide plate; and each of the fixed blocks is provided with a guide rod, the guide rod extends radially along the center rod, the guide rod is passed through the guide portion, and can slide radially along the center rod; the first end of the guide rod is connected to the fixed block, and the second end of the guide rod is connected to the second end of the connecting rod.

[0016] It is further configured that each of the fixing blocks is provided with a guide groove, a plurality of guide blocks are correspondingly provided on the guide plate, the plurality of guide blocks are respectively provided in one-to-one correspondence with the plurality of guide grooves, and the guide blocks are provided in the corresponding guide grooves.

[0017] It is further configured that the fixing mechanism also includes a plurality of retractable shock-absorbing rods, and the plurality of shock-absorbing rods are respectively arranged in one-to-one correspondence with the plurality of connecting rods, the first end of the shock-absorbing rod can be rotatably connected to the corresponding connecting rod, and the second end of the shock-absorbing rod can be rotatably connected to the center rod.

[0018] It is further configured that the shock absorbing rod comprises a first inner rod, a second inner rod, a fixing sleeve and a first elastic member; the first inner rod and the second inner rod are both inserted into the fixing sleeve, and the first inner rod is used to connect the connecting rod, and the second inner rod is used to connect the center rod;

[0019] The first elastic member is disposed between the first inner rod and the second inner rod, and two ends of the first elastic member are respectively connected to the first inner rod and the second inner rod.

[0020] It is further configured that a connecting piece is also provided on the shell, one end of the center rod passes through the connecting piece and can be rotatably arranged around the axial direction of the center rod.

[0021] It is further configured that a connecting assembly is provided between adjacent fixing blocks, and the connecting assembly includes two connecting blocks and a second elastic member;

[0022] The two connecting blocks are respectively arranged in one-to-one correspondence with the two adjacent fixing blocks, and the first end of the connecting block is rotatably connected to the corresponding fixing block, and the second ends of the two connecting blocks are rotatably connected;

[0023] The first end of the second elastic member is connected to one of the connection blocks, and the second end of the second elastic member is connected to the other connection block.

[0024] It is further configured that the housing further includes a sealing cover, which is disposed on the plurality of fixing blocks and connected to the abutting portion;

[0025] The sealing cover, part of the abutting portion, part of the fixing block and part of the sealing ring together form the detection cavity; and / or the guide plate, part of the abutting portion, part of the fixing block and part of the sealing ring together form the test cavity.

[0026] It is further configured that a detection passage is provided on the sealing cover, and a first end of the detection passage is communicated with the detection cavity, so that the detection member detects the test fluid through a second end of the detection passage.

[0027] It is further configured that, taking a plane perpendicular to the first direction as a cross section, a cross-sectional area of ​​the abutting portion gradually increases along the first direction, or a cross-sectional area of ​​the abutting portion gradually decreases along the first direction.

[0028] It is further configured that a high-pressure chamber is formed in the shell, and the high-pressure chamber is communicated with the test chamber to provide the test fluid into the test chamber.

[0029] It is further configured that a ventilation passage is also formed on the shell, a first end of the ventilation passage is connected to the high-pressure chamber, and a second end of the ventilation passage is connected to an intake passage and / or an exhaust passage;

[0030] The air inlet passage comprises an air source chamber and a control component, wherein the air source chamber is used to provide the test fluid to the high-pressure chamber, and the control component is arranged between the air source chamber and the ventilation passage and is used to adjust the test parameters of the test fluid, wherein the test parameters include the pressure of the test fluid and the temperature of the test fluid;

[0031] The exhaust passage includes an exhaust chamber and an exhaust valve. The exhaust chamber is used to recover the test fluid in the high-pressure chamber, and the exhaust valve is used to control the on-off state between the exhaust chamber and the high-pressure chamber.

[0032] It is further configured that a test component is provided on the ventilation passage, and the test component includes at least one of a pressure test piece and a temperature test piece;

[0033] The pressure test piece is used to detect the pressure of the test fluid, and the temperature test piece is used to detect the temperature of the test fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0035] Figure 1 A schematic diagram of the structure of the sealing performance test equipment provided in the embodiment of the present application;

[0036] Figure 2 A cross-sectional view of a sealing performance test device provided in an embodiment of the present application;

[0037] Figure 3 A schematic diagram of the installation structure of a sealing ring with a larger diameter provided in an embodiment of the present application;

[0038] Figure 4 A schematic diagram of the installation structure of a sealing ring with a smaller diameter provided in an embodiment of the present application;

[0039] Figure 5 A schematic diagram of the installation structure of the compressed sealing ring provided in an embodiment of the present application;

[0040] Figure 6 A structural schematic diagram for showing a fixing mechanism provided in an embodiment of the present application;

[0041] Figure 7 A schematic diagram of the structure of a driving component provided in an embodiment of the present application;

[0042] Figure 8 A schematic diagram of the structure of a connector provided for an embodiment of the present application;

[0043] Fig. 9 A schematic diagram of the structure of a shock absorbing rod provided in an embodiment of the present application;

[0044] Fig.10 A schematic diagram of a structure for connecting components provided in an embodiment of the present application;

[0045] Fig.11 A schematic diagram of the structure of the intake passage and the exhaust passage provided in an embodiment of the present application.

[0046] Description of reference numerals:

[0047] 100, housing; 110, top cover; 120, sealing cover; 121, mounting groove; 122, mounting block; 123, detection passage; 130, abutment portion; 140, high pressure chamber; 141, ventilation passage; 142, control member; 143, through hole; 150, test assembly; 151, pressure test member; 152, temperature test member; 160, connecting member; 161, connecting plate; 162, fixing rod; 170, test chamber; 180, detection chamber; 200, fixing mechanism; 210, drive assembly; 211, guide plate; 212, drive member; 213, connecting rod; 214, guide block; 215, guide portion; 220, damping rod; 221, first inner rod ; 222, second inner rod; 223, fixing sleeve; 224, first elastic member; 225, sealing member; 230, center rod; 231, rotating head; 240, fixing block; 241, guide groove; 242, guide rod; 250, connecting assembly; 251, connecting block; 252, second elastic member; 300, sealing ring; 400, air intake passage; 410, air source bin; 411, main air intake valve; 420, pressure control device; 421, first air intake valve; 430, temperature control device; 440, stabilizing device; 450, second air intake valve; 460, third air intake valve; 500, exhaust passage; 510, waste gas bin; 520, exhaust valve; 600, detection member.

[0048] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0049] As described in the background technology, good sealing performance is the most important performance requirement of the sealing ring, which plays a vital role in the normal use of the equipment. For example, in the application of sealing rings in high-pressure hydrogen storage containers, good sealing performance of the sealing ring is an indispensable key technology to ensure the safe and reliable use of high-pressure hydrogen storage containers. The quality of the sealing performance directly affects whether the high-pressure hydrogen storage container can maintain the required internal environment, as well as the possibility of hydrogen leakage in the high-pressure hydrogen storage container, which in turn affects the life safety of relevant operators and the property safety of the equipment.

[0050] And considering that the sealing ring may be used on different equipment or in different positions of the same equipment, the sealing ring needs to work under different pressure conditions and different temperature conditions, which also puts higher requirements on the sealing performance of the sealing ring. Considering that the diameter and compression amount of the sealing ring are varied, and the sealing ring needs to play a sealing role within a large pressure range and a wide temperature range, it is necessary to use a variety of test equipment to test the sealing performance of the sealing ring. However, there is a lack of test equipment dedicated to the sealing performance test of the sealing ring, which makes the test process of the sealing performance of the sealing ring complicated and the test efficiency low.

[0051] In order to solve the above technical problems, an embodiment of the present application provides a sealing performance testing device, which abuts against the inner side of the sealing ring through multiple fixed blocks, and the abutting part abuts against the outer side of the sealing ring, so that a test chamber and a detection chamber filled with a test fluid can be formed in the shell, and the sealing ring is located between the test chamber and the detection chamber, and separates the test chamber from the detection chamber; so that the test fluid in the test chamber will not flow into the detection chamber, so that when the detection element is used to detect the test fluid in the detection chamber, the sealing performance of the sealing ring can be determined by parameters such as the concentration of the test fluid in the detection chamber, and thus it can be applicable to the test process of the sealing performance of sealing rings of different sizes and compression amounts, thereby solving the problems of complex test process and low test efficiency of the sealing performance of the sealing ring.

[0052] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0053] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0054] Reference Figure 1-Figure 4 An embodiment of the present application provides a sealing performance testing device, including a shell 100, a fixing mechanism 200 and a detection member 600; the shell 100 is formed with an opening, and the opening is used to accommodate the fixing mechanism 200, and an abutment portion 130 is formed in the shell 100, and the abutment portion 130 is used to abut against the outer side of the sealing ring 300.

[0055] Reference Figure 6-Figure 7 , and the fixing mechanism 200 includes a center rod 230, a plurality of fixing blocks 240 and a driving assembly 210, the center rod 230 extends along a first direction, and the center rod 230 is arranged at the center of the abutment portion 130, and a plurality of fixing blocks 240 are evenly arranged on the outside of the center rod 230 along the circumference of the center rod 230; the driving assembly 210 is used to drive the plurality of fixing blocks 240 to move radially along the center rod 230 so that the fixing blocks 240 abut against the inner side of the sealing ring 300, so that the sealing rings 300 of different diameters can be fixed by using the plurality of fixing blocks 240 and the abutment portion 130.

[0056] When the abutting portion 130 abuts against the outer side of the sealing ring 300, and the plurality of fixing blocks 240 abut against the inner side of the sealing ring 300, a test chamber 170 and a detection chamber 180 are formed in the shell 100. The test chamber 170 and the detection chamber 180 are arranged along a first direction, and the test chamber 170 is filled with a test fluid. The sealing ring 300 is located between the test chamber 170 and the detection chamber 180 to separate the test chamber 170 from the detection chamber 180, so that the test fluid in the test chamber 170 does not flow into the detection chamber 180, and the detection member 600 is used to detect the test fluid in the detection chamber 180, so as to detect the airtightness between the test chamber 170 and the detection chamber 180.

[0057] It is easy to understand that in the embodiment of the present application, the sealing ring 300 is an O-ring, and the sealing performance test equipment of the embodiment of the present application can be applied to sealing rings 300 made of a variety of materials, such as silicone rubber or other rubber materials with high elasticity, or plastic and metal materials. And the test fluid can be adjusted according to the actual situation, that is, it can be adjusted according to the actual application scenario of the sealing ring 300. When the sealing ring 300 is used to seal liquid fluids, the test fluid is set to liquid; when the sealing ring 300 is used to seal gaseous fluids, the test fluid is set to gaseous. For example, when the sealing ring 300 is applied to a high-pressure hydrogen storage container, the test fluid is set to hydrogen. Exemplarily, in the embodiment of the present application, the specific structure of the sealing performance test equipment is described by taking the test fluid as hydrogen and the sealing ring 300 as made of silicone rubber as an example.

[0058] Combine the following Figure 1-Figure 7The specific structure of the fixing mechanism 200 is described. Exemplarily, the driving assembly 210 includes a guide plate 211, a driving member 212 and a plurality of connecting rods 213; the guide plate 211 is arranged in the shell 100, and the edge of the guide plate 211 is connected to the abutment portion 130, and the guide plate 211 is used to connect a plurality of fixing blocks 240 so that the plurality of fixing blocks 240 can slide radially along the center rod 230; the driving member 212 is sleeved on the center rod 230 and can move on the center rod 230 along the first direction; the plurality of connecting rods 213 are arranged in a one-to-one correspondence with the plurality of fixing blocks 240, and the first end of the connecting rod 213 can be rotatably connected to the driving member 212, and the second end of the connecting rod 213 can be rotatably connected to the corresponding fixing block 240, so that when the driving member 212 moves on the center rod 230 along the first direction, the plurality of fixing blocks 240 can be driven to slide radially along the center rod 230 through the plurality of connecting rods 213.

[0059] By adopting the above technical solution, when the driving assembly 210 is used to drive multiple fixed blocks 240 to slide radially along the center rod 230 so that the multiple fixed blocks 240 can all abut against the inner side of the sealing ring 300, the driving member 212 is pulled along the first direction, so that the driving member 212 drives the connecting rod 213 to rotate around the first end, and the second end of the connecting rod 213 rotates and drives the fixed blocks 240 to slide radially along the center rod 230, that is, moves in a direction close to or away from the center rod 230, so that the multiple fixed blocks 240 can all abut against the inner sides of sealing rings 300 of different diameters, and the outer side of the sealing ring 300 can contact the abutment portion 130.

[0060] It is easy to understand that in the embodiment of the present application, the shape and number of the fixed blocks 240 can be achieved in a variety of ways. For example, the number of the fixed blocks 240 can be set to eight or ten, and the sides of the multiple fixed blocks 240 away from the center rod 230 are all set to an arc shape, so that the side of the fixed block 240 away from the center rod 230 can fit tightly with the inner side of the sealing ring 300, thereby ensuring the airtightness of the detection cavity 180 and the test cavity.

[0061] It should also be noted that the first end of the connecting rod 213 and the driving member 212, as well as the second end of the connecting rod 213 and the fixing block 240 can be set to be hinged, or connected via a universal joint, as long as the normal rotation of the connecting rod 213 can be guaranteed.

[0062] Continue to refer to Figure 1-Figure 7 In the embodiment of the present application, the center rod 230 is rotatable around the first direction and is set on the shell 100, and is passed through the guide plate 211; the driving assembly 210 also includes a rotating head 231, which is threadedly connected to the center rod 230; and the driving member 212 is rotatable around the first direction and is connected to the rotating head 231.

[0063] By adopting the above-mentioned technical solution, when it is necessary to use the driving assembly 210 to drive multiple fixed blocks 240 to slide on the guide plate 211, the center rod 230 is rotated so that the center rod 230 can rotate on the guide plate 211 around the first direction, and the center rod 230 is threadedly connected to the rotating head 231, so that the rotating head 231 can move along the first direction on the center rod 230, and the rotating head 231 is rotatably connected to the driving member 212, so that the driving member 212 can be driven to slide on the center rod 230, and then the driving member 212 can be used to drive multiple fixed blocks 240 to slide on the guide plate 211.

[0064] Reference Figure 6 and Figure 7 Furthermore, in order to make the sliding process of the fixed block 240 on the guide plate 211 more stable, a guide portion 215 is also provided on the guide plate 211; and each fixed block 240 is provided with a guide rod 242, which extends radially along the center rod 230, and the guide rod 242 is passed through the guide portion 215 and can slide radially along the center rod 230; the first end of the guide rod 242 is connected to the fixed block 240, and the second end of the guide rod 242 is connected to the second end of the connecting rod 213, so that the connecting rod 213 can be connected to the corresponding fixed block 240 by using the guide rod 242.

[0065] Continue to refer to Figure 6 and Figure 7 As for the specific structure of the guide portion 215, it is easy to understand that the guide portion 215 can be implemented in a variety of ways. For example, the guide portion 215 can be set to multiple, and the multiple guide portions 215 are set one-to-one with the multiple connecting rods 213, so that the multiple guide rods 242 can be inserted into the corresponding guide portion 215; or, in the embodiment of the present application, the guide portion 215 is set to one, and the cross-section of the guide portion 215 is set to a ring shape with a plane perpendicular to the first direction as the cross-section, and the center of the guide portion 215 coincides with the center of the center rod 230, so that multiple guide rods 242 can be connected simultaneously using one guide portion 215.

[0066] By adopting the above-mentioned technical solution, when the driving assembly 210 is used to drive multiple fixed blocks 240 to move, the center rod 230 is rotated, thereby driving the driving member 212 to slide along the first direction on the center rod 230, and then the driving member 212 can be used to drive multiple connecting rods 213 to rotate, and the second end of the connecting rod 213 can drive the guide rod 242 to slide radially along the center rod 230 in the guide part 215, so that the guide rod 242 can drive the corresponding fixed block 240 to slide on the guide plate 211.

[0067] In the embodiment of the present application, the fixing mechanism 200 further includes a plurality of retractable shock absorbing rods 220, and the plurality of shock absorbing rods 220 are respectively arranged in one-to-one correspondence with the plurality of connecting rods 213, and the first end of the shock absorbing rod 220 can be rotatably connected to the corresponding connecting rod 213, and the second end of the shock absorbing rod 220 can be rotatably connected to the central rod 230. Thus, when the connecting rod 213 rotates, thereby driving the guide rod 242 to move, it is ensured that the length of the shock absorbing rod 220 can be changed within a small range, thereby reducing the possibility of vibration of the plurality of fixing blocks 240 during the radial movement along the central rod 230, or reducing the vibration amplitude of the plurality of fixing blocks 240 during the movement.

[0068] Reference Figure 6-Figure 8 As for the shock absorbing rod 220, it can be implemented in a variety of ways. In the embodiment of the present application, the shock absorbing rod 220 includes a first inner rod 221, a second inner rod 222, a fixing sleeve 223 and a first elastic member 224; the first inner rod 221 and the second inner rod 222 are both inserted into the fixing sleeve 223, and can both slide in the fixing sleeve 223 along the length direction of the fixing sleeve 223, and the first inner rod 221 is used to connect the connecting rod 213, and the second inner rod 222 is used to connect the center rod 230; the first elastic member 224 is arranged between the first inner rod 221 and the second inner rod 222, and the two ends of the first elastic member 224 are respectively connected to the first inner rod 221 and the second inner rod 222, so that the elasticity of the first elastic member 224 can be used to realize the telescopic process of the shock absorbing rod 220.

[0069] Taking into account that the first inner rod 221 and the second inner rod 222 need to slide in the fixed sleeve 223 multiple times to achieve the change in the length of the shock-absorbing rod 220, illustratively, sealing members 225 are provided at both ends of the fixed sleeve 223, so that the sealing members 225 can be used to reduce the possibility of dust and other impurities entering the fixed sleeve 223, thereby reducing the influence of dust and other impurities on the sliding process of the first inner rod 221 and the second inner rod 222, and the sealing member 225 can also play a certain fixing role on the fixed sleeve 223, thereby ensuring the extension and retraction process of the shock-absorbing rod 220.

[0070] Combine the following Figure 6-Figure 8 The fixed block 240 and the guide plate 211 are described. For example, each fixed block 240 is provided with a guide groove 241, and a plurality of guide blocks 214 are correspondingly provided on the guide plate 211. The plurality of guide blocks 214 are respectively provided in a one-to-one correspondence with the plurality of guide grooves 241, and the guide blocks 214 are provided in the corresponding guide grooves 241. Thus, the guide blocks 214 can cooperate with the guide grooves 241, thereby making the sliding process of the fixed block 240 more stable.

[0071] Alternatively, each fixed block 240 is provided with a guide block 214, and a plurality of guide grooves 241 are opened on the guide plate 211, and each guide groove 241 extends radially along the center rod 230, so that when the fixed block 240 slides on the guide plate 211, the guide block 214 arranged on the fixed block 240 can slide in the corresponding guide groove 241.

[0072] Reference Figure 6-Figure 9 In order to make the connection between adjacent fixed blocks 240 more stable, in the embodiment of the present application, a connecting assembly 250 is arranged between adjacent fixed blocks 240, and the connecting assembly 250 includes two connecting blocks 251 and a second elastic member 252; the two connecting blocks 251 are respectively arranged in a one-to-one correspondence with two adjacent fixed blocks 240, and the first end of the connecting block 251 is rotatably connected to the corresponding fixed block 240, and the second ends of the two connecting blocks 251 are rotatably connected; the first end of the second elastic member 252 is connected to one of the connecting blocks 251, and the second end of the second elastic member 252 is connected to the other connecting block 251.

[0073] By adopting the above technical solution, when multiple fixed blocks 240 slide on the guide plate 211 along the radial direction of the center rod 230, the distance between adjacent fixed blocks 240 gradually increases or decreases, so that two adjacent fixed blocks 240 respectively drive the corresponding connecting blocks 251 to rotate, and the two connecting blocks 251 rotate relative to each other, so that the two connecting blocks 251 can be used to fill the space between adjacent fixed blocks 240; and the second elastic member 252 can play a certain limiting role on the relative position of the two connecting blocks 251, ensuring that the connection between the two connecting blocks 251 can form an arc transition, avoiding the situation where the two connecting blocks 251 are stuck or difficult to return to their original position, thereby making the connection between adjacent fixed blocks 240 more stable.

[0074] Reference Figure 6-Figure 10 In order to make the rotation process of the center rod 230 more stable, illustratively, a connecting piece 160 is further provided on the shell 100, and one end of the center rod 230 passes through the connecting piece 160 and can be rotatably arranged around the axial direction of the center rod 230, so that the connecting piece 160 and the guide plate 211 can play a certain centering role in the rotation process of the center rod 230, ensuring that the center rod 230 can always rotate around the first direction, reducing the possibility of shaking of the center rod 230, and making the rotation process of the center rod 230 more stable.

[0075] Continue to refer to Figure 6-Figure 10The specific structure of the connecting member 160 is described below. The connecting member 160 includes a connecting disk 161 and a plurality of fixing rods 162. The connecting disk 161 is used to penetrate the center rod 230. The plurality of fixing rods 162 are all arranged along the radial direction of the center rod 230 and are evenly arranged on the connecting disk 161 along the circumferential direction of the center rod 230. The first end of the fixing rod 162 is connected to the connecting disk 161, and the second end of the fixing rod 162 is fixed to the housing 100, so that the connecting disk 161 can be connected to the housing 100 through the plurality of fixing rods 162. 61 is fixed on the shell 100; as for the specific connection relationship between the second end of the fixing rod 162 and the shell 100, illustratively, a mounting groove 121 is opened on the shell 100, and the second end of the fixing rod 162 is placed in the mounting groove 121, and a mounting block 122 is also provided in the mounting groove 121, and the mounting block 122 contacts the second end of the fixing rod 162 and is fixed in the mounting groove 121 by fasteners such as screws, so that the second end of the fixing rod 162 can be fixed to the shell 100.

[0076] In order to make the connection between the fixing rod 162 and the housing 100 more stable, refer to Fig.10 , illustratively, the second end of the fixing rod 162 is provided with a protrusion, and the protrusion has an inclined surface, and in the direction toward the second end of the fixing rod 162, the inclined surface is inclined in the direction away from the guide plate; when the second end of the fixing rod 162 is installed in the installation groove 121, the fixing rod 162 can be clamped in the housing through the inclined surface on the protrusion, so that the installation of the fixing rod 162 is more stable. As for the inclination angle of the inclined surface, the embodiment of the present application does not impose further restrictions on this, as long as the stability of the installation of the fixing rod 162 can be guaranteed.

[0077] Combine the following Figure 1-Figure 10 The specific structure of the shell 100 is described. The shell 100 also includes a sealing cover 120, which is covered on multiple fixed blocks 240 and connected to the abutment portion 130; and in an embodiment of the present application, when the sealing ring 300 is arranged between the test chamber 170 and the detection chamber 180, the abutment portion 130, the fixed block 240 and the sealing cover 120 are all abutted against the sealing ring 300, and the sealing cover 120, part of the abutment portion 130, part of the fixed block 240 and part of the sealing ring 300 jointly form the detection chamber 180; and / or, the guide plate 211, part of the abutment portion 130, part of the fixed block 240 and part of the sealing ring 300 jointly form the test chamber 170.

[0078] When the sealing ring 300 is installed so that the sealing performance test of the sealing ring 300 can be carried out, the sealing cover 120 is removed from the fixing block 240, and then the sealing ring 300 is placed between the abutting portion 130 and the fixing block 240, and then the sealing ring 300 is fixed by using the fixing mechanism 200, so that the inner side of the sealing ring 300 can abut against multiple fixing blocks 240, and the outer side of the sealing ring 300 can contact the abutting portion 130, and the guide plate 211, part of the abutting portion 130, part of the fixing block 240 and part of the sealing ring 300 can form a test cavity 170 together; then the sealing cover 120 is covered on the multiple fixing blocks 240 and contacts the abutting portion 130, so that the sealing cover 120, part of the abutting portion 130, part of the fixing block 240 and part of the sealing ring 300 can form a detection cavity 180 together, thereby realizing the test process of the sealing performance of the sealing ring 300.

[0079] Reference Figure 2-Figure 4 In the embodiment of the present application, a detection passage 123 is provided on the sealing cover 120, and a first end of the detection passage 123 is connected to the detection chamber 180, so that the detection member 600 detects the test fluid through the second end of the detection passage 123, so that the detection member 600 can be installed outside the detection chamber 180, making the installation process of the detection member 600 more convenient. As for the detection member 600, it can be implemented in a variety of ways. For example, in the embodiment of the present application, the detection member 600 can select a component that can detect the concentration of hydrogen.

[0080] Exemplarily, with the plane perpendicular to the first direction as the cross section, the cross-sectional area of ​​the abutment portion 130 gradually increases along the first direction, or the cross-sectional area of ​​the abutment portion 130 gradually decreases along the first direction, so that the outer sides of the sealing rings 300 with different outer diameters can abut on the abutment portion 130, and thus the sealing rings 300 with different outer diameters can be tested. In the embodiment of the present application, with the plane perpendicular to the first direction as the cross section, the cross-sectional area of ​​the abutment portion 130 gradually decreases along the direction close to the sealing cover 120, that is, when the outer diameter of the sealing ring 300 increases, the outer side of the sealing ring 300 can contact the side of the abutment portion 130 away from the sealing cover 120; when the outer diameter of the sealing cover 120 decreases, the outer side of the sealing ring 300 can contact the side of the abutment portion 130 close to the sealing cover 120, so as to ensure the formation of the test cavity 170 and the detection cavity 180.

[0081] Reference Figure 3 and Figure 4By adopting the above technical scheme, when the sealing performance test is performed on the sealing ring 300 with different outer diameters, the sealing ring 300 is placed between the abutting portion 130 and the fixing block 240, and then the sealing ring 300 is fixed by the fixing mechanism 200, so that the inner side of the sealing ring 300 can abut against the multiple fixing blocks 240, and the outer side of the sealing ring 300 can contact the abutting portion 130; if the outer diameter of the sealing ring 300 in this test is smaller than the outer diameter of the sealing ring 300 in the previous test, the sealing ring 300 is moved in a direction close to the guide plate 211, so that the outer side of the sealing ring 300 can contact the abutting portion 130; if the outer diameter of the sealing ring 300 in this test is larger than the outer diameter of the sealing ring 300 in the previous test, the sealing ring 300 is moved in a direction away from the guide plate 211, so that the outer side of the sealing ring 300 can contact the abutting portion 130.

[0082] Reference Figure 3 and Figure 5 When it is necessary to test the sealing performance of the sealing ring 300 under different compression amounts or different cross-sectional areas, the sealing ring 300 is placed between the abutment portion 130 and the fixed block 240, and then the center rod 230 is rotated so that the center rod 230 can drive the multiple fixed blocks 240 to move in a direction away from the center rod 230 through the driving assembly 210, thereby expanding the inner diameter of the sealing ring 300 and increasing the compression amount of the sealing ring 300, that is, the cross-sectional area of ​​the sealing ring 300 becomes smaller, so that the sealing ring 300 moves in a direction away from the guide plate 211, and the outer side of the sealing ring 300 can always be in contact with the abutment portion 130, so that the sealing performance of the sealing ring 300 under different compression amounts or different cross-sectional areas can be tested.

[0083] It should also be noted that, exemplarily, the mounting groove 121 can be provided on the sealing cover 120, so as to reduce the length of the fixing rod 162; and the shell 100 is also provided with a top cover 110, which is provided on the opening, so as to close the shell 100; as for the specific installation method of the top cover 110, exemplarily, the top cover 110 can be detachably installed on the shell 100, and can be removed from the opening, for example, the top cover 110 is fixed to the shell 100 by snap-fitting, or the top cover 110 is hinged on the shell 100, so that it can be covered on the opening, or removed from the opening.

[0084] Combine the following Figure 2 and Fig.11The process of filling the test chamber 170 with the test fluid is described below. A high-pressure chamber 140 is also formed in the housing 100 . The high-pressure chamber 140 is communicated with the test chamber 170 to provide the test fluid into the test chamber 170 . It is easy to understand that the high-pressure chamber 140 can be formed in the shell 100 in a variety of ways. For example, the high-pressure chamber 140 can be formed between the side of the guide plate 211 away from the sealing cover 120 and part of the shell 100, or a high-pressure tank body can be installed in the shell 100, so that the high-pressure chamber 140 can be formed using the interior of the high-pressure tank body. The embodiments of the present application do not impose further restrictions on this; and the high-pressure chamber 140 can be connected to the test chamber 170 in a variety of ways. For example, at least one through hole 143 can be opened on the guide plate 211, or a flow channel pipeline can be arranged inside the guide plate 211 or the abutment 130; or a certain gap is retained between the guide plate 211 and the abutment 130, so that the test fluid can flow from the high-pressure chamber 140 through the gap into the test chamber 170, so that the filling process of the test fluid can be realized through the flow channel pipeline.

[0085] Continue to refer to Figure 2 and Fig.11 Furthermore, a ventilation passage 141 is formed on the shell 100, and a first end of the ventilation passage 141 is connected to the high-pressure chamber 140, and a second end of the ventilation passage 141 is connected to an air intake passage 400, and the air intake passage 400 includes an air source compartment 410 and a control component, the air source compartment 410 is used to provide a test fluid to the high-pressure chamber 140, and the control component is arranged between the air source compartment 410 and the ventilation passage 141, and is used to adjust the test parameters of the test fluid, and the test parameters include the pressure of the test fluid and the temperature of the test fluid; exemplarily, the control component includes a pressure control device 420 and a temperature control device 430, so that the pressure of the test fluid can be controlled by the pressure control device 420, and the temperature of the test fluid can be controlled by the temperature control device 430, and then different test conditions can be created by adjusting the pressure and temperature of the test fluid, so as to perform a sealing performance test of the sealing ring 300 under different temperature and pressure conditions.

[0086] Reference Fig.11 , specifically, the air outlet of the air source warehouse 410 is connected to the air inlet of the pressure control device 420, and the air outlet of the pressure control device 420 is connected to the air inlet of the temperature control device 430, and the air outlet of the temperature control device 430 is connected to the second end of the ventilation passage 141; when the test fluid is provided to the high-pressure chamber 140 through the air inlet passage 400, the air outlet of the air source warehouse 410 discharges the high-pressure test fluid, so that the test fluid can enter the ventilation passage 141 through the pressure control device 420 and the temperature control device 430 in turn, and then enter the high-pressure chamber 140 through the ventilation passage 141.

[0087] Continue to refer to Fig.11 , and exemplarily, in order to realize the control process of the flow of the test fluid, a main air intake valve 411 is arranged between the air outlet of the air source warehouse 410 and the air inlet of the pressure control device 420, so that the main air intake valve 411 can be used to control the test fluid discharged from the air source warehouse 410; and a first air intake valve 421 is arranged between the air outlet of the pressure control device 420 and the air inlet of the temperature control device 430, and a stabilizing device 440 and a second air intake valve 450 are also arranged between the air outlet of the temperature control device 430 and the second end of the ventilation passage 141, so that the stabilizing device 440 can be used to make the test fluid flow stably and evenly in the air intake passage 400.

[0088] In order to quickly deliver the test fluid at normal temperature and high pressure to the ventilation passage 141, in an embodiment of the present application, the air outlet of the pressure control device 420 is directly connected to the second end of the ventilation passage 141, and a third air intake valve 460 is also provided between the air outlet of the pressure control device 420 and the second end of the ventilation passage 141, so that the third control valve can play a certain control role.

[0089] By adopting the above technical solution, when it is necessary to control the temperature and pressure of the test fluid, the main air inlet valve 411, the first air inlet valve 421 and the second air inlet valve 450 are opened, and the third air inlet valve 460 is closed, so that the fluid flowing out of the air outlet of the gas source warehouse 410 can pass through the pressure control device 420 and the temperature control device 430 in sequence, and can pass through the stabilizing device 440, and then can stably and evenly flow to the ventilation passage 141; and when it is not necessary to control the temperature of the test fluid. When only the pressure of the test fluid needs to be controlled, the main air inlet valve 411 and the third air inlet valve 460 are opened, and the first air inlet valve 421 and the second air inlet valve 450 are closed, so that the fluid flowing out of the air outlet of the gas source warehouse 410 can enter the ventilation passage 141 through the pressure control device 420 without passing through the temperature control device 430.

[0090] It is easy to understand that in the embodiment of the present application, the gas source warehouse 410, the pressure control device 420, the temperature control device 430 and the stabilization device 440 can be implemented in a variety of ways, and the embodiment of the present application does not impose further restrictions on this.

[0091] And / or, the second end of the ventilation passage 141 is connected to the exhaust passage 500, and the exhaust passage 500 includes a waste gas chamber 510 and an exhaust valve 520, the waste gas chamber 510 is used to recover the test fluid in the high-pressure chamber 140, and the exhaust valve 520 is used to control the on-off state between the waste gas chamber 510 and the high-pressure chamber 140.

[0092] After completing the sealing performance test of the sealing ring 300, close the main intake valve 411, the first intake valve 421, the second intake valve 450 and the third intake valve 460, and open the exhaust valve 520, so that the test fluid in the high-pressure chamber 140 can flow into the exhaust gas chamber 510 through the ventilation passage 141 and the exhaust passage 500 in turn, thereby realizing the recovery process of the test fluid.

[0093] Continue to refer to Fig.11 In the embodiment of the present application, a test assembly 150 is also provided on the ventilation passage 141, and the test assembly 150 includes at least one of a pressure test piece 151 and a temperature test piece 152; for example, the test assembly 150 includes both a pressure test piece 151 and a temperature test piece 152, and the pressure test piece 151 is used to detect the pressure of the test fluid, and the temperature test piece 152 is used to detect the temperature of the test fluid, so that the pressure and temperature of the test fluid in the test chamber 170 can be determined, and then the conditions of different cross-sectional areas and different compression amounts can be determined with the cooperation of the detection piece 600, and the limit pressure and limit temperature that the sealing ring 300 can withstand. It is easy to understand that the pressure test piece 151 can be selected from components such as pressure sensors, and the temperature test piece 152 can be selected from components such as temperature sensors.

[0094] In addition, a control component 142 is provided on the ventilation passage 141 , so that the control component 142 can be used to control the on-off of the ventilation passage 141 , thereby ensuring that during the test, the high-pressure chamber 140 will not be connected to the intake passage 400 or the exhaust passage 500 through the ventilation passage 141 .

[0095] In summary, considering that the sealing ring 300 may be used under different pressure conditions and different temperature conditions, the sealing performance test process provided in the embodiment of the present application is described below by taking the pressure of the test fluid as 30MPa-160MPa and the temperature of the test fluid as -50°C-160°C as an example, so that the sealing performance of the sealing ring 300 can be tested within a larger pressure range and within a wide temperature range, specifically including the following steps:

[0096] First, the sealing ring 300 is installed on the outside of the plurality of fixing blocks 240, and then the driving assembly 210 is used to drive the plurality of fixing blocks 240 to move radially along the center rod 230, so that the plurality of fixing blocks 240 are all in contact with the inner side of the sealing ring 300, and the contact portion 130 is in contact with the outer side of the sealing ring 300, so that a test cavity 170 and a detection cavity 180 filled with a test fluid can be formed in the housing 100, and the sealing ring 300 is located between the test cavity 170 and the detection cavity 180, and separates the test cavity 170 from the detection cavity 180, so that the test fluid in the test cavity 170 does not flow into the detection cavity 180;

[0097] Then, the main air inlet valve 411, the first air inlet valve 421 and the second air inlet valve 450 are opened, so that the test fluid in the air source compartment 410 can flow in the air inlet passage 400, and then the pressure of the test fluid is controlled to 30MPa by the pressure control device 420, and the temperature of the test fluid is controlled to -50°C by the temperature control device 430, so that the test fluid can enter the high-pressure chamber 140 through the ventilation passage 141, and enter the test chamber 170 through the high-pressure chamber 140; then, the test time is set, and after the test time has passed, the concentration of the test fluid in the detection chamber 180 is detected by the detection member 600. If the detection member 600 detects the presence of the test fluid in the detection chamber 180, the sealing performance of the sealing ring 300 is poor. If the detection member 600 does not detect the presence of the test fluid in the detection chamber 180, the sealing performance of the sealing ring 300 is good.

[0098] After completing this test, the main air intake valve 411, the first air intake valve 421, the second air intake valve 450 and the third air intake valve 460 are closed, and the exhaust valve 520 is opened, so that the test fluid in the high-pressure chamber 140 can flow into the exhaust gas chamber 510 through the ventilation passage 141 and the exhaust passage 500 in sequence, thereby realizing the recovery process of the test fluid;

[0099] Subsequently, by changing the cross-sectional area and compression amount of the sealing ring 300, or by changing the pressure and temperature of the test fluid, the test conditions are changed, and the above steps are repeated, so as to obtain the influence of the cross-sectional area and compression amount of the sealing ring 300 on the sealing performance; and the influence of the pressure and temperature of the test fluid on the sealing performance of the sealing ring 300 can be obtained.

[0100] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0101] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A sealing performance test equipment, characterized in that: It includes a housing, a fixing mechanism and a detection member; The housing is used to accommodate the fixing mechanism, and an abutment portion is formed in the housing, and the abutment portion is used to abut against the outer side of the sealing ring; The fixing mechanism comprises a central rod, a plurality of fixing blocks and a driving assembly, wherein the central rod extends in a first direction, and the plurality of fixing blocks are evenly arranged along the circumference of the central rod; the driving assembly is used to drive the plurality of fixing blocks to move along the radial direction of the central rod so that each of the fixing blocks abuts against the inner side of the sealing ring; When the abutting portion abuts against the outer side of the sealing ring, and the plurality of fixing blocks abut against the inner side of the sealing ring, a test cavity and a detection cavity are formed in the housing, the test cavity and the detection cavity are arranged along the first direction, the sealing ring is located between the test cavity and the detection cavity to separate the test cavity from the detection cavity; the test cavity is filled with a test fluid, and the detection member is used to detect the test fluid in the detection cavity; Wherein, the first direction is the height direction of the shell.

2. The sealing performance test equipment according to claim 1, characterized in that: The driving assembly includes a guide plate, a driving member and a plurality of connecting rods; The guide plate is arranged in the housing, and the guide plate is used to connect the plurality of fixing blocks so that the plurality of fixing blocks can slide along the radial direction of the central rod; The driving member is sleeved on the central rod and can move on the central rod along the first direction; The plurality of connecting rods are arranged in one-to-one correspondence with the plurality of fixing blocks, and the first end of the connecting rod is rotatably connected to the driving member, and the second end of the connecting rod is rotatably connected to the corresponding fixing block.

3. The sealing performance test equipment according to claim 2, characterized in that: The driving assembly further comprises a rotating head, which is threadedly connected to the central rod; the driving member is rotatably connected to the rotating head around the first direction.

4. The sealing performance test equipment according to claim 2, characterized in that: A guide portion is also provided on the guide plate; and each of the fixed blocks is provided with a guide rod, which extends radially along the center rod, is passed through the guide portion, and can slide radially along the center rod; the first end of the guide rod is connected to the fixed block, and the second end of the guide rod is connected to the second end of the connecting rod.

5. The sealing performance test equipment according to claim 2, characterized in that: Each of the fixing blocks is provided with a guide groove, and a plurality of guide blocks are correspondingly provided on the guide plate. The plurality of guide blocks are respectively provided in one-to-one correspondence with the plurality of guide grooves, and the guide blocks are provided in the corresponding guide grooves.

6. The sealing performance test equipment according to any one of claims 2 to 5, characterized in that: The fixing mechanism also includes a plurality of retractable shock absorbing rods, which are respectively arranged in one-to-one correspondence with the plurality of connecting rods. The first end of the shock absorbing rod can be rotatably connected to the corresponding connecting rod, and the second end of the shock absorbing rod can be rotatably connected to the center rod.

7. The sealing performance test equipment according to claim 6, characterized in that: The shock-absorbing rod comprises a first inner rod, a second inner rod, a fixing sleeve and a first elastic member; the first inner rod and the second inner rod are both inserted into the fixing sleeve, and the first inner rod is used to connect the connecting rod, and the second inner rod is used to connect the central rod; The first elastic member is disposed between the first inner rod and the second inner rod, and two ends of the first elastic member are respectively connected to the first inner rod and the second inner rod.

8. The sealing performance test equipment according to claim 1, characterized in that: The shell is also provided with a connecting piece, and one end of the central rod passes through the connecting piece and can be rotatably arranged around the axial direction of the central rod.

9. The sealing performance test equipment according to claim 1, characterized in that: A connecting assembly is provided between adjacent fixing blocks, and the connecting assembly includes two connecting blocks and a second elastic member; The two connecting blocks are respectively arranged in one-to-one correspondence with the two adjacent fixing blocks, and the first end of the connecting block is rotatably connected to the corresponding fixing block, and the second ends of the two connecting blocks are rotatably connected; The first end of the second elastic member is connected to one of the connection blocks, and the second end of the second elastic member is connected to the other connection block.

10. The sealing performance test equipment according to claim 2, characterized in that: The housing further comprises a sealing cover, which is disposed on the plurality of fixing blocks and connected to the abutting portion; The sealing cover, part of the abutting portion, part of the fixing block and part of the sealing ring together form the detection cavity; and / or the guide plate, part of the abutting portion, part of the fixing block and part of the sealing ring together form the test cavity.

11. The sealing performance test equipment according to claim 10, characterized in that: The sealing cover is provided with a detection passage, a first end of which is communicated with the detection cavity, so that the detection member detects the test fluid through a second end of the detection passage.

12. The sealing performance test equipment according to claim 1, characterized in that: Taking a plane perpendicular to the first direction as a cross section, the cross-sectional area of ​​the abutting portion gradually increases along the first direction, or the cross-sectional area of ​​the abutting portion gradually decreases along the first direction.

13. The sealing performance test equipment according to claim 1, characterized in that: A high-pressure chamber is also formed in the shell, and the high-pressure chamber is communicated with the test chamber to provide the test fluid into the test chamber.

14. The sealing performance test equipment according to claim 13, characterized in that: The housing is also provided with a ventilation passage, a first end of which is connected to the high-pressure chamber, and a second end of which is connected to an intake passage and / or an exhaust passage; The air inlet passage comprises an air source chamber and a control component, wherein the air source chamber is used to provide the test fluid to the high-pressure chamber, and the control component is arranged between the air source chamber and the ventilation passage and is used to adjust the test parameters of the test fluid, wherein the test parameters include the pressure of the test fluid and the temperature of the test fluid; The exhaust passage includes an exhaust chamber and an exhaust valve. The exhaust chamber is used to recover the test fluid in the high-pressure chamber, and the exhaust valve is used to control the on-off state between the exhaust chamber and the high-pressure chamber.

15. The sealing performance test equipment according to claim 14, characterized in that: A test component is provided on the ventilation passage, and the test component includes at least one of a pressure test piece and a temperature test piece; The pressure test piece is used to detect the pressure of the test fluid, and the temperature test piece is used to detect the temperature of the test fluid.

Images