Straight cylinder type clamp for sealing ring performance analysis, assembling method and system

Abstract

The invention relates to the technical field of sealing equipment performance evaluation tools, in particular to a straight cylinder type clamp for sealing ring performance analysis and an assembling method and system. The straight cylinder type clamp for analyzing the performance of the sealing ring comprises a first plate body, a second plate body, a third plate body and a fastener. A first wall surface, a vent hole and a first assembly hole are formed in the first plate body; the second plate body is detachably connected with the first plate body, and a second wall surface is formed on the second plate body; a third wall surface, a detection chamber and a second assembly hole are formed in the third plate body; and the fastener is matched with the first assembly hole and the second assembly hole in sequence. According to the straight cylinder type clamp for sealing ring performance analysis, the assembling method and the system provided by the invention, the to-be-tested sealing ring and the clamp are convenient to assemble and disassemble, the manufacturing cost is reduced, and the simulation efficiency is improved; the simulation test of the assembly of the sealing ring in a specified environment is realized; damage caused by uneven pressure on the to-be-tested sealing ring is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of sealing equipment performance evaluation tools, and in particular to a straight-tube fixture, an assembly method and a system for sealing ring performance analysis. Background Art

[0002] With the development of science and technology, the development of hydrogen energy and hydrogen fuel cell vehicles has received attention. Sealing components are an indispensable and important part of hydrogen energy products. The sealing performance of sealing components directly affects whether hydrogen energy products can maintain the required internal pressure and the possibility of hydrogen leakage.

[0003] In the relevant technical field, sealing components usually use sealing rings, which are arranged between two workpieces that need to be sealed. For example, an annular groove is machined on the surface of one of the workpieces, and the sealing ring is arranged inside the annular groove; during assembly, the other workpiece is placed on the workpiece and the two workpieces are pressed against each other, so that the sealing ring inside the annular groove is elastically deformed under the action of the squeezing force, so that its upper and lower surfaces are tightly fitted with the sealing surfaces of the two workpieces, thereby achieving the sealing of the two workpieces.

[0004] However, the same sealing ring will have a significant impact on its sealing performance under different pressure environments, and generally a simulation test is required to place the sealing ring in a specified pressure environment to test the sealing performance of the sealing ring. For example: the existing simulation test is generally performed in a high-pressure hydrogen environment, where the sealing ring is directly assembled between the workpieces that need to be sealed, but it has the following defects: the workpieces that need to be sealed need to be pre-made, and they need to be assembled under a high-pressure hydrogen environment, which has the problems of high cost, difficult assembly, and low simulation efficiency, and the sealing ring is easily damaged during the assembly process and the test process. Therefore, it is urgent to make a fixture specifically used for simulating the sealing performance test of the sealing ring, which is used to install the sealing ring, and simulate the test to detect the sealing performance of the sealing ring. Summary of the invention

[0005] The present invention provides a straight-cylinder fixture, an assembly method and a system for analyzing the performance of a sealing ring, so as to solve the problems in the prior art that a workpiece to be sealed needs to be fabricated in advance and needs to be assembled in a high-pressure hydrogen environment, has the problems of high cost, difficult assembly, low simulation efficiency, and is prone to damage to the sealing ring during the assembly process and the test process.

[0006] The present invention provides a straight-tube fixture for analyzing the performance of a sealing ring, comprising: A first plate body is formed with a first wall surface, a vent hole and a first assembly hole, wherein one end of the vent hole penetrates the first plate body to communicate with the surrounding environment, and the other end penetrates the first wall surface; A second plate body is detachably connected to the first plate body, and the second plate body is formed with a second wall surface; A third plate body is formed with a third wall surface, a detection chamber and a second assembly hole, the second assembly hole is arranged opposite to the first assembly hole, and the detection chamber is used to place a test paper to detect the sealing performance of the sealing ring to be tested; A fastener, which sequentially cooperates with the first assembly hole and the second assembly hole to enable the third plate body to be detachably connected to the first plate body; When the first plate body, the second plate body and the third plate body are assembled and connected, the first wall surface, the second wall surface and the third wall surface form an installation groove for accommodating the sealing ring to be tested, and the detection chamber is located on the side of the installation groove away from the first wall surface.

[0007] According to the straight-tube clamp for sealing ring performance analysis provided by the present invention, the fastener includes: a first bolt connector and a nut, the first bolt connector passes through the first assembly hole and the second assembly hole in sequence, and the nut is cooperatively connected with the first bolt connector.

[0008] According to the straight-cylindrical fixture for sealing ring performance analysis provided by the present invention, a guide groove is formed on the first wall surface, one end of the guide groove extends in a direction away from the third wall surface, and one end of the guide groove is connected to the vent hole, and the other end of the guide groove is connected to the mounting groove, so that the vent hole is connected to the sealing ring to be tested in a staggered manner.

[0009] According to the straight-cylindrical fixture for sealing ring performance analysis provided by the present invention, a drainage portion is formed on the second wall surface and close to the guide groove, one end of the drainage portion extends toward one end of the guide groove, and the other end of the drainage portion extends toward the direction of the third wall surface.

[0010] According to the straight-tube fixture for sealing ring performance analysis provided by the present invention, a first positioning groove is provided on one side of the first plate body close to the second plate body, and a first positioning boss is provided on one side of the second plate body close to the first plate body, and the first positioning boss can be embedded in the first positioning groove to position the second plate body and the first plate body; or, A second positioning boss is provided on one side of the first plate body close to the second plate body, and a second positioning groove is provided on one side of the second plate body close to the first plate body. The second positioning boss can be embedded in the second positioning groove to position the second plate body and the first plate body.

[0011] According to the straight-cylindrical fixture for sealing ring performance analysis provided by the present invention, the third plate body is formed with a stepped groove, and the stepped groove forms a accommodating chamber and the detection chamber in sequence, the first plate body is at least partially placed in the accommodating chamber and is formed with a first stepped surface to be clamped on the stepped groove, so that the second assembly hole is opposite to the first assembly hole, the second wall surface is a second stepped surface and the second plate body is placed in the accommodating chamber.

[0012] According to the straight-tube fixture for sealing ring performance analysis provided by the present invention, a transition portion connecting adjacent end surfaces is formed on the inner wall of the accommodating chamber and at one end away from the detection chamber to gradually squeeze the sealing ring to be tested.

[0013] According to the straight-tube fixture for sealing ring performance analysis provided by the present invention, the first wall surface is a horizontal surface close to the second plate body, and the third wall surface is a vertical surface inside the accommodating chamber.

[0014] According to the straight-cylindrical fixture for sealing ring performance analysis provided by the present invention, a disassembly hole is provided on the first plate body. When the first plate body, the second plate body and the third plate body are combined and connected, after the fastener is removed, the disassembly hole is used to insert a locking piece, and the locking is used to remove and separate the third plate body from the first plate body.

[0015] The straight-cylindrical fixture for sealing ring performance analysis provided by the present invention also includes: a second bolt connector, the first plate body is formed with a through hole, the second plate body is formed with a threaded hole, the second bolt connector passes through the through hole and is connected to the threaded hole, so that the second plate body is detachably connected to the first plate body.

[0016] The present invention provides an assembly method of a straight-tube fixture for analyzing the performance of a sealing ring in an embodiment of the present invention, comprising: S1, inserting the sealing ring to be tested into the outer side of the second wall surface of the second plate body; S2, connecting the second plate body to the first plate body, and placing a test paper in the detection chamber; S3. Use fasteners to assemble and cooperate with the first assembly hole and the second assembly hole to connect the third plate body to the first plate body.

[0017] The present invention further provides a sealing ring performance analysis test system, comprising: a straight-tube fixture for sealing ring performance analysis in an embodiment of the present invention.

[0018] The present invention provides a straight-tube fixture for analyzing the performance of a sealing ring, which includes: a first plate, a second plate, a third plate and a fastener. The first plate is formed with a first wall, a vent and a first assembly hole, and one end of the vent passes through the first plate to communicate with the environment, and the other end passes through the first wall; the second plate is detachably connected to the first plate, and the second plate is formed with a second wall; the third plate is formed with a third wall, a detection chamber and a second assembly hole, the second assembly hole is arranged opposite to the first assembly hole, and the detection chamber is used to place a test paper to detect the sealing performance of the sealing ring to be tested; the fastener is matched with the first assembly hole and the second assembly hole in sequence, so that the third plate is detachably connected to the first plate. When the first plate, the second plate and the third plate are combined and connected, the first wall, the second wall and the third wall form an installation groove for accommodating the sealing ring to be tested, and the detection chamber is located on the side of the installation groove away from the first wall. The present invention provides a straight-cylinder clamp for analyzing the performance of a sealing ring, wherein the first plate body, the second plate body and the third plate body are detachably connected, which is convenient for assembling and disassembling the sealing ring to be tested and the clamp, and multiple tests can be performed on sealing rings of the same specification, thereby reducing the cost and improving the simulation efficiency; due to the arrangement of the vent holes, the sealing ring to be tested is in the same environment, thereby realizing a simulation test of assembling the sealing ring in a specified environment; the first plate body and the third plate body are detachably connected through the cooperation of fasteners and assembly holes, and the influence of the corresponding pressing method on the sealing ring to be tested can be simulated, and the sealing ring to be tested needs to be installed in a sealing workpiece that is pressed tightly through the assembly hole by fasteners, which has a good simulation effect, and can also effectively avoid damage to the sealing ring to be tested caused by uneven pressure.

[0019] The present invention provides an assembly method of a threaded clamp for sealing ring performance analysis, which can first install the sealing ring to be tested on a second plate body, and then assemble the clamp to avoid damage such as expansion of the sealing ring to be tested due to the clamp assembly process.

[0020] The present invention also provides a sealing ring performance analysis test system, which includes the straight-tube fixture for sealing ring performance analysis in the above-mentioned embodiment of the present invention, and therefore has the same advantages as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of a straight-tube fixture for analyzing the performance of a sealing ring provided in one embodiment of the present invention.

[0023] Figure 2 It is a schematic diagram of the horizontal structure of the first plate body provided in one embodiment of the present invention.

[0024] Figure 3 FIG. 4 is a bottom view of the structure of the first plate provided in one embodiment of the present invention.

[0025] Figure 4 It is a schematic diagram of the horizontal structure of the second plate body provided in one embodiment of the present invention.

[0026] Figure 5 It is a schematic diagram of the horizontal structure of the third plate body provided in one embodiment of the present invention.

[0027] Figure 6 This is a fourth schematic diagram of the bottom view structure of the third plate provided in one embodiment of the present invention.

[0028] Reference numerals: 100: first plate; 101: first wall; 102: vent hole; 103: first assembly hole; 104: first positioning groove; 105: through hole; 106: guide groove; 107: disassembly hole; 200: second plate; 201: second wall; 202: first positioning boss; 203: threaded hole; 204: drainage part; 300: third plate; 301: third wall; 302: detection chamber; 303: second assembly hole; 304: accommodating chamber; 305: transition part; 400: sealing ring to be tested; 501: first bolt connector; 502: nut; 600: second bolt connector. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present embodiment.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this embodiment, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In this embodiment, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0033] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] Combine the following Figure 1-Figure 6 The invention describes a straight-tube fixture for analyzing the performance of a sealing ring. The straight-tube fixture for analyzing the performance of a sealing ring comprises: a first plate body 100, a second plate body 200, a third plate body 300 and a fastener.

[0035] Among them, the first plate body 100 is formed with a first wall 101, a vent hole 102 and a first assembly hole 103, and one end of the vent hole 102 passes through the first plate body 100 and is connected to the environment, and the other end passes through the first wall 101; the second plate body 200 is detachably connected to the first plate body 100, and the second plate body 200 is formed with a second wall 201; the third plate body 300 is formed with a third wall 301, a detection chamber 302 and a second assembly hole 303, the second assembly hole 303 is arranged opposite to the first assembly hole 103, and the detection chamber 302 is used to place a test paper to detect the sealing performance of the sealing ring 400 to be tested; the fastener cooperates with the first assembly hole 103 and the second assembly hole 303 in sequence, so that the third plate body 300 is detachably connected to the first plate body 100.

[0036] When the first plate 100 , the second plate 200 and the third plate 300 are assembled and connected, the first wall 101 , the second wall 201 and the third wall 301 form an installation groove for accommodating the sealing ring 400 to be tested, and the detection chamber 302 is located on the side of the installation groove away from the first wall 101 .

[0037] In the embodiment of the present invention, the first plate body 100, the second plate body 200 and the third plate body 300 can be combined and connected to form a combined body, and can also be removed separately, so as to facilitate the assembly and removal of the sealing ring.

[0038] Specifically, the second plate body 200 and the first plate body 100 are detachably connected. During the assembly process, the seal ring 400 to be tested is first inserted into the outer side of the second wall surface 201 of the second plate body 200, and then the second plate body 200 and the first plate body 100 are connected, and the test paper is placed in the detection chamber 302. Finally, the first assembly hole 103 and the second assembly hole 303 are connected through the threaded portion to form a fixture with the seal ring 400 to be tested installed. In the above assembly process, since the seal ring 400 to be tested is first inserted into the second plate body 200, and then the fixture is assembled, the problem of first assembling the fixture and then inserting the seal ring 400 to be tested may be avoided, which may cause damage to the seal ring 400 to be tested. It can be understood that if the fixture is assembled first and then the seal ring 400 to be tested is inserted, the seal ring 400 to be tested may be stretched and damaged. Therefore, it is considered to assemble the seal ring 400 to be tested first and then assemble the fixture.

[0039] It can be understood that a mounting groove is formed by the first wall surface 101 of the first plate body 100, the second wall surface 201 of the second plate body 200 and the third wall surface 301 of the third plate body 300, and the mounting groove is used to accommodate the sealing ring 400 to be tested, and when the first assembly hole 103 and the second assembly hole 303 are opposite to each other, the two can be fastened together by a fastener, so that the first plate body 100 and the third plate body 300 are assembled in place, and at the same time, the sealing ring 400 to be tested is squeezed, and the sealing ring 400 to be tested is pressurized in the mounting groove to play a sealing role, and the fixture of the present invention is placed in a specified environment, such as a high-pressure hydrogen environment. Due to the arrangement of the vent hole 102, the sealing ring 400 to be tested is in the same environment, thereby realizing a simulation test of assembling the sealing ring in the specified environment.

[0040] The test paper in the test chamber 302 is used to test the sealing performance of the seal ring 400 to be tested. After the simulation test is completed, the fixture is taken out as a whole, the first plate 100, the second plate 200 and the third plate 300 are removed, and the test paper is observed to determine the sealing performance of the seal ring 400 to be tested. Figure 1 In the structure shown, since the detection chamber 302 is located on the side of the mounting groove away from the first wall 101, that is, the side away from the vent 102, when the fixture is placed in the specified environment, the vent 102 is used to connect the sealing ring 400 to the specified environment. If the sealing performance of the sealing ring 400 to be tested is good, the test paper does not change; if the sealing performance of the sealing ring 400 to be tested fails, the test paper changes. It should be understood that the test paper should be able to change according to the specified environment in which the fixture is located. If the environment in which the fixture is located is a high-pressure hydrogen environment, the test paper should be selected accordingly. Hydrogen test paper.

[0041] It can be seen that, by using the fixture provided by the present invention, the sealing performance test of the sealing ring can be carried out without specially preparing the workpiece to be sealed, and multiple repeated tests can be carried out for sealing rings of the same size and specification, thereby reducing the cost and improving the simulation efficiency.

[0042] In addition, the first plate 100 and the third plate 300 in the present invention are assembled by pressing and connecting the first assembly hole 103 and the second assembly hole 303 with fasteners. Generally, in order to ensure the stability of the connection between the first plate 100 and the third plate 300, at least two groups of assembly holes need to be set and pressed by fasteners. Therefore, in the above assembly process, the first plate 100 and the third plate 300 will be pressed in different areas respectively, so that the local extrusion of the sealing ring 400 to be tested will also be affected. The above assembly method can simulate the influence of the corresponding pressing method through the fastener through the assembly hole on the sealing ring 400 to be tested, and has a good simulation effect on the sealing ring 400 to be tested installed in the sealing workpiece that needs to be pressed and connected by different areas.

[0043] It is worth noting that, according to the structural form of the seal ring 400 to be tested, the present invention is not limited to the specific shape of the installation groove. If the sealing performance of the O-ring is tested, the installation groove is an annular structure.

[0044] The present invention provides a straight-tube fixture for analyzing the performance of a sealing ring, which includes: a first plate 100, a second plate 200, a third plate 300 and a fastener. The first plate 100 is formed with a first wall 101, a vent 102 and a first assembly hole 103, and one end of the vent 102 passes through the first plate 100 to communicate with the environment, and the other end passes through the first wall 101; the second plate 200 is detachably connected to the first plate 100, and the second plate 200 is formed with a second wall 201; the third plate 300 is formed with a third wall 301, a detection chamber 302 and a second assembly hole 303, the second assembly hole 303 is arranged opposite to the first assembly hole 103, and the detection chamber 302 is used to place a test paper to detect the sealing performance of the sealing ring 400 to be tested; the fastener is matched with the first assembly hole 103 and the second assembly hole 303 in sequence, so that the third plate 300 is detachably connected to the first plate 100. When the first plate 100 , the second plate 200 and the third plate 300 are assembled and connected, the first wall 101 , the second wall 201 and the third wall 301 form an installation groove for accommodating the sealing ring 400 to be tested, and the detection chamber 302 is located on the side of the installation groove away from the first wall 101 . The present invention provides a straight-cylinder fixture for analyzing the performance of sealing rings, wherein the first plate body 100, the second plate body 200 and the third plate body 300 are detachably connected, which is convenient for assembling and disassembling the sealing ring 400 to be tested and the fixture, and multiple tests can be performed on sealing rings of the same specification, thereby reducing the cost and improving the simulation efficiency; due to the arrangement of the vent holes 102, the sealing ring 400 to be tested is in the same environment, thereby realizing a simulation test of assembling the sealing ring in a specified environment; the first plate body 100 and the third plate body 300 are detachably connected by fasteners and assembly holes, and the influence of the corresponding pressing method on the sealing ring 400 to be tested can be simulated, and a good simulation effect is achieved when the sealing ring 400 to be tested is installed in a sealing workpiece that needs to be pressed through the assembly hole by fasteners, and the damage of the sealing ring 400 to be tested due to uneven pressure can also be effectively avoided.

[0045] In one embodiment of the present invention, the fastener comprises: a first bolt connector 501 and a nut 502, the first bolt connector 501 passes through the first assembly hole 103 and the second assembly hole 303 in sequence, and the nut 502 is matched and connected with the first bolt connector 501. Specifically, the fastener comprises a first bolt connector 501 and a nut 502, and multiple groups can be provided as needed, such as Figure 1The structure shown is provided with two sets of first bolt connectors 501 and nuts 502. After the seal ring 400 to be tested, the first plate 100 and the second plate 200 are assembled, the first plate 100 is butted with the third plate 300 so that the first assembly hole 103 is opposite to the second assembly hole 303, the rod of the first bolt connector 501 is passed through the two assembly holes in sequence, and the nut 502 is screwed into one end of the rod. As the nut 502 is tightened, the first plate 100 and the third plate 300 are gradually pressed and matched, and at the same time, the seal ring 400 to be tested is squeezed.

[0046] In one embodiment of the present invention, a guide groove 106 is formed on the first wall surface 101, one end of the guide groove 106 extends in a direction away from the third wall surface 301, and one end of the guide groove 106 is connected to the vent hole 102, and the other end of the guide groove 106 is connected to the mounting groove, so that the vent hole 102 is misaligned and connected with the sealing ring 400 to be tested. In this embodiment, since the environment in which the fixture is placed may be a high-pressure environment, if the vent hole 102 is directly opposite to the sealing ring 400 to be tested, the sealing ring 400 to be tested may be deformed or even damaged. Therefore, in this embodiment, by providing the guide groove 106 on the first wall surface 101, the air outlet of the vent hole 102 is transferred to a position away from the sealing ring 400 to be tested. According to the above embodiments, the installation groove is formed by the first wall surface 101, the second wall surface 201 and the third wall surface 301 in sequence. Therefore, it can be determined that one end of the first wall surface 101 is connected to the third wall surface 301, and the other end of the first wall surface 101 is connected to the second wall surface 201, and the guide groove 106 is located on the first wall surface 101 and extends in a direction away from the third wall surface 301, that is, the guide groove 106 extends in a direction away from the installation groove / the sealing ring to be tested 400 position, avoiding the damage easily caused by the air outlet of the vent hole 102 blowing directly to the sealing ring to be tested 400. On the one hand, it can ensure that the sealing ring to be tested 400 is connected to the external environment, and on the other hand, it can reduce the impact damage of the high-pressure airflow on the sealing ring to be tested 400. It should be understood that a gap is left between the guide groove 106 and the upper end surface of the second plate body 200 so that the airflow can pass through and communicate with the installation groove.

[0047] In one embodiment of the present invention, a drainage portion 204 is formed on the second wall 201 and near the guide groove 106, one end of the drainage portion 204 extends toward one end of the guide groove 106, and the other end of the drainage portion 204 extends toward the third wall 301. Preferably, the drainage portion 204 can adopt an inclined surface or arc transition surface structure formed on the second wall 201, which, on the one hand, has the effect of draining the gas at the outlet of the vent 102, and guides the external environment airflow to the position of the sealing ring 400 to be tested; on the other hand, it reduces the impact damage to the second wall 201 caused by the high-pressure airflow, and improves the durability of the fixture. Moreover, the drainage portion 204 is located on the second wall 201, and can play a transition role when the sealing ring to be tested is inserted, and can also further reduce the damage caused by the insertion of the sealing ring to be tested.

[0048] In one embodiment of the present invention, a first positioning groove 104 is provided on a side of the first plate body 100 close to the second plate body 200, and a first positioning boss 202 is provided on a side of the second plate body 200 close to the first plate body 100, and the first positioning boss 202 can be embedded in the first positioning groove 104 to position the second plate body 200 and the first plate body 100; or, a second positioning boss is provided on a side of the first plate body 100 close to the second plate body 200, and a second positioning groove is provided on a side of the second plate body 200 close to the first plate body 100, and the second positioning boss can be embedded in the second positioning groove to position the second plate body 200 and the first plate body 100. In the present invention, in order to facilitate the positioning and rapid assembly of the first plate body 100 and the second plate body 200, the first plate body 100 and the second plate body 200 are quickly docked by matching and snapping the positioning boss and the positioning groove. In this embodiment, two forms of positioning bosses and positioning grooves that can be interchanged are provided. As shown in FIG. Figure 1 The structure shown is used as an example. A first positioning groove 104 is processed on the bottom of the first plate body 100, and a first positioning boss 202 is processed on the upper part of the second plate body 200. According to actual conditions, the processing positions of the two can be interchanged, as long as the positioning groove and the positioning boss can be positioned and connected. That is, in this embodiment, a second positioning boss is processed on the bottom of the first plate body 100, and a second positioning groove is processed on the upper part of the second plate body 200.

[0049] In one embodiment of the present invention, the third plate 300 is formed with a stepped groove, and the stepped groove sequentially forms a receiving chamber 304 and a detection chamber 302, the first plate 100 is at least partially placed in the receiving chamber 304 and is formed with a first stepped surface to be snapped on the stepped groove, so that the second assembly hole 303 is opposite to the first assembly hole 103, the second wall surface 201 is a second stepped surface, and the second plate 200 is placed in the receiving chamber 304. In this embodiment, the third plate 300 forms a double-layer stepped groove, and the receiving chamber 304 and the detection chamber 302 are sequentially formed from top to bottom, the receiving chamber 304 is used to receive the first plate 100 and the second plate 200, the upper end surface of the receiving chamber 304 is snapped with the first stepped surface of the first plate 100, and the stepped groove and the first stepped surface have a positioning function to ensure that the second assembly hole 303 is opposite to the first assembly hole 103. After the first plate body 100 and the second plate body 200 are assembled, the second stepped surface and the first wall surface 101 form a groove, and the sealing ring 400 to be tested is sleeved in the groove. After the first plate body 100 and the third plate body 300 are assembled, the upper half of the first plate body 100 is exposed to the outside of the accommodating chamber 304 and fits with the upper end surface of the third plate body 300, and the lower half is placed in the accommodating chamber 304, so that the outer side of the sealing ring 400 to be tested is squeezed by the third wall surface 301, and the sealing effect is played. The gas in the vent hole 102 enters the installation groove. If the sealing performance of the sealing ring 400 to be tested fails, the airflow flows to the detection chamber 302 through the gap between the third wall surface 301 and the second wall surface 201, and the test paper changes; if the sealing performance of the sealing ring is excellent, the airflow to the detection chamber 302 is blocked.

[0050] In one embodiment of the present invention, a transition portion 305 connecting adjacent end faces is formed on the inner wall of the accommodating chamber 304 and at one end away from the detection chamber 302, so as to gradually squeeze the sealing ring 400 to be tested. After the sealing ring 400 to be tested is assembled, the first assembly hole 103 is opposite to the third assembly hole, and the sealing ring 400 to be tested is in a free state. As the fastener is pressed, the sealing ring 400 to be tested will contact the stepped groove and thus be compressed to provide a sealing effect. However, the sharp end of the stepped groove may damage the sealing ring 400 to be tested. Therefore, in this embodiment, a transition portion 305 is provided at the connection between the horizontal end face and the vertical end face at the upper end of the accommodating chamber 304, so as to gradually squeeze the sealing ring 400 to be tested and avoid damage to it. Preferably, the transition portion 305 can be a transition slope or a transition arc surface, etc.; preferably, the angle of the transition slope is 67° with the horizontal angle.

[0051] In one embodiment of the present invention, the first wall surface 101 is a horizontal surface close to the second plate body 200, and the third wall surface 301 is a vertical surface inside the accommodating chamber 304. According to the description of the above embodiment, the second wall surface 201 is a stepped surface, and the bottom horizontal surface and the side vertical surface provided cooperate with the first wall surface 101 and the third wall surface 301 to form a vertical groove for accommodating the sealing ring 400 to be tested.

[0052] In one embodiment of the present invention, a disassembly hole 107 is provided on the first plate body 100. When the first plate body 100, the second plate body 200 and the third plate body 300 are assembled and connected, after the fasteners are removed, the disassembly hole 107 is used to insert the locking member, and the third plate body 300 is removed and separated from the first plate body 100 by locking. After the first plate body 100, the second plate body 200 and the third plate body 300 are assembled in place, due to the compression deformation of the sealing ring 400 to be tested, even after the fasteners are removed, it is still difficult to separate the first plate body 100 from the third plate body 300. Therefore, in this embodiment, the disassembly hole 107 is processed on the third plate body 300, and the third plate body 300 can be separated from the first plate body 100 by inserting the locking member into the disassembly hole 107 and applying external force to the locking member. Preferably, the disassembly hole 107 is a threaded hole 203, and the locking member is a bolt. After the bolt is screwed into the threaded hole 203, the nut is clamped with a wrench and pulled outward, and the third plate body 300 is driven by the bolt to separate it from the first plate body 100.

[0053] In one embodiment of the present invention, the straight-tube fixture for analyzing the performance of the sealing ring further includes: a second bolt connector 600, the first plate 100 is formed with a through hole 105, the second plate 200 is formed with a threaded hole 203, and the second bolt connector 600 passes through the through hole 105 and is connected with the threaded hole 203, so that the second plate 200 and the first plate 100 can be detachably connected. Specifically, the threaded hole 203 is located at the center of the positioning boss, and when the first plate 100 and the second plate 200 are positioned, the bolt connector passes through the through hole 105 of the first plate 100 and is tightened with the threaded hole 203 of the second plate 200, so that the first plate 100 and the second plate 200 are pressed and connected.

[0054] The present invention also provides an assembly method of the straight-tube fixture for analyzing the performance of the sealing ring according to the above embodiment of the present invention. The assembly method comprises the following steps: S1, insert the sealing ring 400 to be tested into the outer side of the second wall surface 201 of the second plate body 200; S2, connecting the second plate body 200 to the first plate body 100, and placing a test paper in the detection chamber 302; S3. Use fasteners to assemble and cooperate with the first assembly hole 103 and the second assembly hole 303 to connect the third plate body 300 to the first plate body 100.

[0055] Specifically, the sealing ring 400 to be tested is first inserted into the outer side of the second stepped surface of the second plate body 200, and then the first plate body 100 and the second plate body 200 are connected by the second bolt connector 600. At this time, the first wall surface 101 is located above the sealing ring 400 to be tested, and the test paper is placed in the detection chamber 302. Finally, the first plate body 100 is inserted into the stepped groove of the third plate body 300, so that the first assembly hole 103 is opposite to the second assembly hole 303, and the above-mentioned assembly holes are pressed by fasteners. During the pressing process, the sealing ring 400 to be tested is squeezed by the third wall surface 301 located on the outside, so that it exerts a sealing effect.

[0056] It can be seen that the present invention provides an assembly method of a threaded fixture for sealing ring performance analysis, which can first install the sealing ring 400 to be tested on the second plate 200, and then assemble the fixture to avoid damage such as expansion of the sealing ring 400 to be tested due to the fixture assembly process.

[0057] The present invention further provides a sealing ring performance analysis test system, which comprises: the straight-tube fixture for sealing ring performance analysis in the above-mentioned embodiment of the present invention.

[0058] The present invention also provides a sealing ring performance analysis test system, which includes the straight-tube fixture for sealing ring performance analysis in the above-mentioned embodiment of the present invention, and therefore has the same advantages as above.

[0059] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, i.e., they may be located in one place, or they may be distributed over multiple units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. Those of ordinary skill in the art may understand and implement the present invention without creative effort.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A straight-tube fixture for analyzing the performance of a sealing ring, characterized in that: include: A first plate body (100) is formed with a first wall surface (101), a vent hole (102) and a first assembly hole (103); one end of the vent hole (102) passes through the first plate body (100) to communicate with the surrounding environment, and the other end passes through the first wall surface (101); A second plate body (200) is detachably connected to the first plate body (100), and the second plate body (200) is formed with a second wall surface (201); A third plate body (300) is formed with a third wall surface (301), a detection chamber (302) and a second assembly hole (303), wherein the second assembly hole (303) is arranged opposite to the first assembly hole (103), and the detection chamber (302) is used to place a test paper to detect the sealing performance of the sealing ring (400) to be tested; a fastener, which cooperates with the first assembly hole (103) and the second assembly hole (303) in sequence, so that the third plate body (300) and the first plate body (100) are detachably connected; When the first plate body (100), the second plate body (200) and the third plate body (300) are assembled and connected, the first wall surface (101), the second wall surface (201) and the third wall surface (301) form a mounting groove for accommodating the sealing ring (400) to be tested, and the detection chamber (302) is located on a side of the mounting groove away from the first wall surface (101).

2. The straight-tube fixture for analyzing the performance of a sealing ring according to claim 1, characterized in that: The fastener comprises: a first bolt connector (501) and a nut (502); the first bolt connector (501) passes through the first assembly hole (103) and the second assembly hole (303) in sequence; and the nut (502) is cooperatively connected with the first bolt connector (501).

3. The straight-tube fixture for analyzing sealing ring performance according to claim 1 is characterized in that: A guide groove (106) is formed on the first wall surface (101), one end of the guide groove (106) extends in a direction away from the third wall surface (301), one end of the guide groove (106) is connected to the vent hole (102), and the other end of the guide groove (106) is communicated with the mounting groove, so that the vent hole (102) is connected to the sealing ring (400) to be tested in a staggered manner.

4. The straight-tube fixture for analyzing the performance of a sealing ring according to claim 3 is characterized in that: A drainage portion (204) is formed on the second wall surface (201) and at a position close to the guide groove (106), one end of the drainage portion (204) extends toward one end of the guide groove (106), and the other end of the drainage portion (204) extends toward the direction of the third wall surface (301).

5. The straight-tube fixture for analyzing the performance of a sealing ring according to claim 1, characterized in that: A first positioning groove (104) is provided on a side of the first plate body (100) close to the second plate body (200), and a first positioning boss (202) is provided on a side of the second plate body (200) close to the first plate body (100), and the first positioning boss (202) can be embedded in the first positioning groove (104) so ​​that the second plate body (200) and the first plate body (100) are positioned; or, A second positioning boss is provided on a side of the first plate body (100) close to the second plate body (200), and a second positioning groove is provided on a side of the second plate body (200) close to the first plate body (100), wherein the second positioning boss can be embedded in the second positioning groove so as to position the second plate body (200) with the first plate body (100).

6. The straight-tube fixture for analyzing sealing ring performance according to claim 1, characterized in that: The third plate body (300) is formed with a stepped groove, and the stepped groove sequentially forms a receiving chamber (304) and the detection chamber (302); the first plate body (100) is at least partially placed in the receiving chamber (304) and is formed with a first stepped surface to be snapped onto the stepped groove, so that the second assembly hole (303) is opposite to the first assembly hole (103), the second wall surface (201) is a second stepped surface and the second plate body (200) is placed in the receiving chamber (304).

7. The straight-tube fixture for analyzing the performance of a sealing ring according to claim 6, characterized in that: A transition portion (305) connecting adjacent end surfaces is formed on the inner wall of the accommodating chamber (304) and at one end away from the detection chamber (302) so as to gradually squeeze the sealing ring (400) to be tested.

8. The straight-tube fixture for analyzing the performance of a sealing ring according to claim 6, characterized in that: The first wall surface (101) is a horizontal surface close to the second plate body (200), and the third wall surface (301) is a vertical surface inside the accommodating chamber (304).

9. The straight-tube fixture for analyzing the performance of a sealing ring according to claim 1, characterized in that: A disassembly hole (107) is provided on the first plate body (100); when the first plate body (100), the second plate body (200) and the third plate body (300) are assembled and connected, after the fastener is removed, the disassembly hole (107) is used to insert a locking piece, and the third plate body (300) is disassembled and separated from the first plate body (100) by using the locking piece.

10. The straight-tube fixture for analyzing the performance of a sealing ring according to any one of claims 1 to 9, characterized in that: Also includes: A second bolt connector (600), wherein the first plate body (100) is formed with a through hole (105), and the second plate body (200) is formed with a threaded hole (203), and the second bolt connector (600) passes through the through hole (105) and is connected to the threaded hole (203), so that the second plate body (200) and the first plate body (100) are detachably connected.

11. An assembly method of a straight-tube fixture for sealing ring performance analysis according to any one of claims 1 to 10, characterized in that: include: S1, inserting the sealing ring (400) to be tested onto the outer side of the second wall surface (201) of the second plate body (200); S2, connecting the second plate body (200) to the first plate body (100), and placing a test paper in the detection chamber (302); S3. Using fasteners to assemble and cooperate with the first assembly hole (103) and the second assembly hole (303), so as to connect the third plate body (300) to the first plate body (100).

12. A sealing ring performance analysis test system, characterized in that: include: A straight-tube fixture for analyzing sealing ring performance as described in any one of claims 1 to 10.

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