Seal detection device

Abstract

The application discloses a sealing detection device for detecting the sealing performance of an internal sealing structure of a rod-shaped part. The sealing detection device comprises a base, a sealing cover assembly and a detection assembly. The base is provided with a mounting hole for the rod-shaped part to be tested to extend into and a detection channel which is in communication with the mounting hole at a position opposite to a radial hole of the rod-shaped part to be tested. The sealing cover assembly comprises a cover body and a sealing ring. The cover body is provided with a through hole for the rod-shaped part to be tested to pass through and is detachably covered on the base. The sealing ring is used for sleeving on the rod-shaped part to be tested to seal the rod-shaped part to be tested and is arranged between the cover body and the base to seal the cover body and the base. The detection assembly is in communication with the detection channel and is used for introducing a fluid detection medium into the detection channel to seal and detect the sealing structure inside the rod-shaped part.

Description

Technical Field

[0001] This application belongs to the field of hydraulic system sealing testing technology, specifically relating to a sealing testing device. Background Technology

[0002] In the application of hydraulic systems, the requirements for leakage control are relatively strict. Significant leakage not only reduces the efficiency of the hydraulic system but also poses safety hazards. Therefore, it is necessary to conduct in-depth analysis and inspection of areas with potential leakage risks to ultimately locate and resolve the source of the problem. Among the many components that can cause leakage, some rod-shaped parts in hydraulic systems, such as valve stems, are particularly important, especially their internal sealing structures (such as check valve cores and spool valves). Because rod-shaped parts have complex internal structures and compact arrangements, traditional sealing detection devices cannot test the sealing performance of the internal sealing structures of these parts. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies, this application provides a sealing test device, which aims to solve the technical problem that traditional sealing test devices cannot test the sealing performance of the inside of rod-shaped parts.

[0004] To achieve the above objectives, this application provides a sealing testing device for detecting the sealing performance of an internal sealing structure of a rod-shaped part. The sealing testing device includes:

[0005] The base has a mounting hole and a detection channel. The mounting hole is for inserting the rod-shaped part to be tested, and the detection channel communicates with the mounting hole at the position opposite the radial hole of the rod-shaped part to be tested.

[0006] A sealing cap assembly includes a cap body and a sealing ring. The cap body has a through hole for a rod-shaped part to be tested to pass through and is detachably mounted on a base. The sealing ring is used to fit over the rod-shaped part to be tested to seal the rod-shaped part to be tested, and the sealing ring is placed between the cap body and the base to seal the cap body and the base.

[0007] The detection component is connected to the detection channel and is used to introduce a fluid detection medium into the detection channel.

[0008] In this embodiment of the application, the cover includes a first assembled cover and a second assembled cover that are separately disposed. The first assembled cover and the second assembled cover are assembled to form a through hole, and both the first assembled cover and the second assembled cover can be detachably mounted on the base.

[0009] In this embodiment of the application, a countersunk hole is formed on the hole wall at one end of the through hole near the base, a first stepped surface is formed between the countersunk hole and the through hole, and a second stepped surface is formed on the rod-shaped part to be tested, and the first stepped surface can abut against the second stepped surface.

[0010] In this embodiment, a mounting groove is formed on the outer periphery of the mounting hole, and the mounting groove is used to place the sealing ring.

[0011] In this embodiment, the mounting groove is configured with an enlarged diameter along the direction from the bottom wall of the mounting groove toward the cover.

[0012] In this embodiment of the application, the sealing detection device further includes a guide sleeve, which is used to be sleeved on the outside of the rod-shaped part to be tested, so that the sealing ring can slide on the guide sleeve to the position of the rod-shaped part to be tested corresponding to the mounting groove.

[0013] In this embodiment, the guide sleeve includes a sleeve portion and a guide head. The sleeve portion is sleeved on the rod-shaped part to be tested. The guide head is connected to the end of the sleeve portion and is used to abut against the end of the rod-shaped part to be tested. The guide head is configured to narrow in diameter from the end of the sleeve portion toward the direction away from the sleeve portion.

[0014] In this embodiment of the application, the base has at least two connecting holes that are circumferentially spaced along the mounting hole, and the cover is detachably connected to the hole wall of the connecting hole by fasteners.

[0015] In this embodiment, the detection component includes a detection pipe and a pressure gauge. The detection pipe allows a fluid detection medium to pass through. The detection channel includes a first channel and a second channel located on both sides of the mounting hole. Both the first channel and the second channel are connected to the mounting hole. The first channel is connected to the detection pipe, and the second channel is connected to the pressure gauge.

[0016] In this embodiment, the first channel includes a connector section and a buffer section arranged sequentially from the outside to the inside. The connector section is used to connect with the connector of the detection pipeline, and the end of the buffer section opposite to the connector section is connected to the mounting hole. The buffer section can be used to buffer the fluid detection medium in the detection pipeline.

[0017] In this embodiment, the first channel and the second channel are respectively located on opposite sides of the mounting hole and their central axes are on the same straight line. Both the first channel and the second channel are connected to the mounting hole at the position opposite the radial hole of the rod-shaped part to be tested.

[0018] Through the above technical solution, the sealing detection device provided in this application embodiment has the following beneficial effects:

[0019] In the technical solution of this application, the sealing detection device can perform sealing detection on the internal sealing structure of a rod-shaped part. During the detection process, a sealing ring is first fitted onto the rod-shaped part to be tested, and the part is inserted into the mounting hole. Then, a cover is placed on the base, connecting the cover to the base and compressing the sealing ring. Next, the detection assembly is connected to the detection channel, and a fluid detection medium is introduced into the detection channel. The fluid detection medium enters the radial hole of the rod-shaped part through the detection channel. If the internal sealing structure of the rod-shaped part has good sealing performance, the fluid detection medium will not flow upward through the sealing structure. If the internal sealing structure of the rod-shaped part has poor sealing performance, the fluid detection medium will flow upward through the sealing structure. The sealing performance of the internal sealing structure of the rod-shaped part can be determined by observing whether the fluid detection medium flows out of the rod or by changes in pressure. Furthermore, the sealing ring seals the radial and axial directions of the rod-shaped part to prevent the fluid detection medium from flowing out or leaking from the gap between the cover, the base, and the rod-shaped part, making the test results more accurate.

[0020] After the test is completed, remove the cover from the base, take the rod-shaped part to be tested out of the mounting hole, and remove the sealing ring from the rod-shaped part to be tested. This allows the sealing test device to perform sealing tests on the next rod-shaped part to be tested, so that the sealing test device can be reused to perform sealing tests on multiple valve stems.

[0021] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0023] Figure 1 This is a schematic diagram of the connection structure between the sealing detection device and the valve stem according to an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the structure of a sealing detection device according to an embodiment of this application;

[0025] Figure 3 yes Figure 1 A magnified view of a portion of point A in the middle;

[0026] Figure 4 This is a schematic diagram of the connection structure between the guide sleeve and the valve stem in a sealing detection device according to an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the structure of the base in a sealing detection device according to an embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the structure of the first assembled cover in a sealing detection device according to an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures

[0030] 10. Base with 232 through holes

[0031] 11 Mounting Hole 233 First Step Surface

[0032] 12 detection channels, 30 sealing rings

[0033] 121 First Channel 40 Guide Sleeve

[0034] 1211 Connector section 41 Sleeve sleeve

[0035] 1212 Buffer section 42 Guide head

[0036] 1213 Pipe section 50 Fasteners

[0037] 122 Second Channel 60 Valve Stem

[0038] 13 Mounting slot 61 Rod body

[0039] 14 Connecting hole 611 Radial hole

[0040] 20 Cover body 62 One-way valve core

[0041] 21 First assembled cover 621 Radial connecting hole

[0042] 22 Second assembly cover 63 Valve core section

[0043] 231 Countersunk Hole 64 Oil Passage Section Detailed Implementation

[0044] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0045] The descriptions of directions such as "up", "down", "front", "back", "left", and "right" in this application are as follows: Figure 1 The directions shown are for reference only and are used to interpret the location. Figure 1 The relative positional relationship between the components in the shown posture is such that if the specific posture changes, the directional indication will also change accordingly.

[0046] The sealing detection device of this application is described below with reference to the accompanying drawings.

[0047] like Figures 1 to 6 As shown, this application provides a sealing detection device, which is used to detect the sealing performance of the internal sealing structure of a rod-shaped part. The sealing detection device includes a base 10, a sealing cover assembly, and a detection assembly. The base 10 has a mounting hole 11 and a detection channel 12. The mounting hole 11 is for the rod-shaped part 60 to be tested to extend into, and the detection channel 12 communicates with the mounting hole 11 at a position opposite to the radial hole 611 of the rod-shaped part 60 to be tested. The sealing cover assembly includes a cover body 20 and a sealing ring 30. The cover body 20 has a through hole 232 for the rod-shaped part 60 to be tested to pass through and is detachably mounted on the base 10. The sealing ring 30 is used to fit onto the rod-shaped part 60 to seal it, and the sealing ring 30 is placed between the cover body 20 and the base 10 to seal both the cover body 20 and the base 10. The detection assembly communicates with the detection channel 12 and is used to introduce a fluid detection medium into the detection channel 12.

[0048] like Figure 1 As shown, the example given is a valve stem within a multi-way control valve of an excavator, represented by the rod-shaped part 60 to be tested. The rod-shaped part 60 includes a spring, a rod body 61, and a one-way valve core 62 housed within the rod body 61. The one-way valve core 62 is the sealing structure inside the valve stem. When oil flows from top to bottom into the rod body 61, it pushes the one-way valve core 62 downwards, compressing the spring within it. This causes the sealing cone surface of the one-way valve core 62 to disengage from the inner hole edge of the rod body 61, allowing oil to enter the one-way valve core 62 through the radial connecting hole 621. Simultaneously, oil enters other parts of the hydraulic valve through the radial hole 611 of the rod body 61. When oil flows from bottom to top, or from the outside to the inside through the radial hole 611 of the rod body 61, the spring tightly presses the sealing cone surface of the one-way valve core 62 against the inner hole edge of the rod body 61, preventing oil from passing through.

[0049] It is understandable that the sealing structure inside the rod-shaped part 60 to be tested can be a one-way valve, a slide valve, or other sealing structures.

[0050] In this application, the mounting hole 11 extends vertically and is used for the insertion of the rod-shaped part 60 to be tested, with its bottom wall abutting against the bottom end of the rod-shaped part 60. The detection channel 12 extends horizontally and communicates with the mounting hole 11 at a position opposite to the radial hole 611 of the rod body 61 of the rod-shaped part 60 to be tested. The cover 20 has a through hole 232 extending vertically, through which the rod-shaped part 60 to be tested passes. The cover 20 is detachably mounted on the base 10 and is used to fix the valve stem 60 and the compression sealing ring 30. The sealing ring 30 is used to fit onto the rod-shaped part 60 to be tested to seal the rod-shaped part 60. The sealing ring 30 is placed between the cover 20 and the base 10. After the cover 20 is placed on the base 10, the cover 20 will squeeze the sealing ring 30 so that the cover 20 and the base 10 can be sealed, thereby achieving axial and radial sealing of the rod-shaped part 60 to be tested.

[0051] The sealing detection device in this application can perform sealing tests on the internal sealing structure of a rod-shaped part 60. During the testing process, the sealing ring 30 is first fitted onto the rod-shaped part 60 to be tested, and the rod-shaped part 60 is inserted into the mounting hole 11. Then, the cover 20 is placed on the base 10, connecting the cover 20 to the base 10 and compressing the sealing ring 30. Next, the detection assembly is connected to the detection channel 12, and a fluid detection medium is introduced into the detection channel 12. The fluid detection medium enters the radial hole 611 of the rod body 61 of the rod-shaped part 60 through the detection channel 12. If the internal sealing structure (one-way valve core 62) of the rod-shaped part 60 has good sealing performance, the fluid detection medium will not flow upward through the sealing structure. If the internal sealing structure of the rod-shaped part 60 has poor sealing performance, the fluid detection medium will flow upward through the sealing structure. The sealing performance of the internal sealing structure of the rod-shaped part 60 can be determined by observing whether the fluid detection medium flows out of the rod body 61 or by changes in pressure. Furthermore, the sealing ring 30 seals the radial and axial directions of the rod-shaped part 60 to be tested, preventing the fluid detection medium from flowing out or leaking from the gap between the cover 20, the base 10 and the rod-shaped part 60 to be tested, thus making the test results more accurate.

[0052] After the test is completed, the cover 20 is removed from the base 10, the rod-shaped part 60 to be tested is taken out from the mounting hole 11, and the sealing ring 30 is removed from the rod-shaped part 60 to be tested, so that the sealing test device can perform sealing test on the next rod-shaped part 60 to be tested, so that the sealing test device can be reused to perform sealing test on multiple valve stems 60.

[0053] Understandably, the fluid detection medium can be either a gaseous or liquid medium. If the fluid detection medium is a gaseous medium, the sealing performance of the one-way valve core 62 of the rod-shaped part 60 under test is determined by detecting the pressure value. If the one-way valve core 62 has poor sealing performance, the gaseous medium will leak from the rod body 61, and the pressure value will drop significantly; if the one-way valve core 62 has good sealing performance, the gaseous medium will not leak from the rod body 61, and the pressure value will remain stable or drop only slightly. If the fluid detection medium is a liquid medium, the sealing performance of the one-way valve core 62 of the rod-shaped part 60 under test can be determined by observing the liquid dripping from the valve body under test. If the one-way valve core 62 has poor sealing performance, the liquid medium will drip or flow out quickly; if the one-way valve core 62 has good sealing performance, the liquid medium will not drip or will take a long time to drip even a single drop.

[0054] In the embodiments of this application, please refer to the following: Figure 2 and Figure 6 The cover 20 includes a first assembled cover 21 and a second assembled cover 22 that are separately arranged. The first assembled cover 21 and the second assembled cover 22 are assembled to form a through hole 232, and both the first assembled cover 21 and the second assembled cover 22 can be detachably mounted on the base 10.

[0055] The first and second assembly covers 21 and 22 are separately disposed and distributed horizontally. The first and second assembly covers 21 and 22 are joined to form a through hole 232 for the rod-shaped part 60 to be tested to pass through. Furthermore, both the first and second assembly covers 21 and 22 can be detachably connected to the base 10, improving the flexibility of use of the cover body 20.

[0056] In the embodiments of this application, please refer to Figure 2 A countersunk hole 231 is formed on the wall of the through hole 232 near the base 10. A first step surface 233 is formed between the countersunk hole 231 and the through hole 232. A second step surface is formed on the rod-shaped part 60 to be tested. The first step surface 233 can abut against the second step surface.

[0057] Please see Figure 2 and Figure 3 The rod-shaped part 60 to be tested has a valve core section 63 and an oil passage section 64. A one-way valve core 62 is disposed within the valve core section 63. The oil passage section 64 is used for oil passage, and a second stepped surface is formed between the oil passage section 64 and the valve core section 63. A countersunk hole 231 is formed on the bottom wall of the through hole 232. The diameter of the countersunk hole 231 is larger than the diameter of the through hole 232, and the diameter of the countersunk hole 231 is equal to the diameter of the mounting hole 11. The first stepped surface 233 formed between the countersunk hole 231 and the through hole 232 can abut against the second stepped surface to fix the rod-shaped part 60 to be tested and prevent axial movement of the rod-shaped part 60.

[0058] In the embodiments of this application, please refer to Figure 3 A mounting groove 13 is formed on the outer periphery of the mounting hole 11, which is used to place the sealing ring 30.

[0059] A mounting groove 13 is formed on the upper periphery of the mounting hole 11. The mounting groove 13 is used to place the sealing ring 30. After the cover 20 is placed on the base 10, the cover 20 squeezes the sealing ring 30 to compress the sealing ring 30 in the mounting groove 13 so that the sealing ring 30 can seal the gap between the cover 20 and the base 10.

[0060] In this embodiment, the mounting groove 13 is provided with an enlarged diameter along the direction from the bottom wall of the mounting groove 13 toward the cover 20.

[0061] like Figure 3 As shown, the diameter of the mounting groove 13 gradually increases along the direction from the bottom wall of the mounting groove 13 toward the cover 20, that is, along the direction from bottom to top. In other words, the diameter of the lower end of the mounting groove 13 is smaller than the diameter of the upper end of the mounting groove 13, which makes the compression of the sealing ring 30 in the mounting groove 13 greater and the sealing effect better.

[0062] In the embodiments of this application, please refer to Figure 4 The sealing test device also includes a guide sleeve 40, which is used to be fitted onto the rod-shaped part 60 to be tested, so that the sealing ring 30 can slide on the guide sleeve 40 to the position of the rod-shaped part 60 to be tested corresponding to the mounting groove 13.

[0063] The rod-shaped part 60 to be tested has groove-like structures such as balance grooves and throttling grooves, resulting in sharp edges or corners on its outer surface. If the sealing ring 30 is directly slid across the outer surface of the rod-shaped part 60, it will be scratched by these sharp edges or corners, reducing its sealing performance. Therefore, the sealing detection device of this application also includes a guide sleeve 40, which can be fitted over the rod-shaped part 60 to allow the sealing ring 30 to slide onto the guide sleeve 40 to the position corresponding to the mounting groove 13. The outer surface of the guide sleeve 40 is smooth. By providing the guide sleeve 40 for the sealing ring 30 to slide, the sealing ring 30 can be protected, preventing it from being scratched by the rod-shaped part 60 and extending its service life.

[0064] In the embodiments of this application, please refer to Figure 4The guide sleeve 40 includes a sleeve portion 41 and a guide head 42. The sleeve portion 41 is sleeved on the outside of the rod-shaped part 60 to be tested. The guide head 42 is connected to the end of the sleeve portion 41 and is used to abut against the end of the rod-shaped part 60 to be tested. The guide head 42 is provided with a reduced diameter from the end of the sleeve portion 41 in the direction away from the sleeve portion 41.

[0065] The sleeve portion 41 is a hollow cylindrical structure, and it is fitted over the rod-shaped part 60 to be tested. The guide head 42 is connected to the end of the sleeve portion 41 and is used to abut against the bottom end of the rod-shaped part 60 to be tested. The guide head 42 is tapered from the end of the sleeve portion 41 toward the direction away from the sleeve portion 41. That is, the guide head 42 gradually narrows from the end of the sleeve portion 41 toward the direction away from the sleeve portion 41. The diameter of the end of the guide head 42 connected to the sleeve portion 41 is larger than the diameter of the end away from the sleeve portion 41. The inner diameter of the sealing ring 30 is smaller than the outer diameter of the rod-shaped part 60 to be tested. The guide head 42 facilitates the installation of the sealing ring 30 onto the guide sleeve 40, making the guide sleeve 40 easier to use.

[0066] It is understood that the guide sleeve 40 can be made of metal or POM (polyoxymethylene) material. The outer surface of the guide sleeve 40 just needs to be smooth. This application does not limit the specific material of the guide sleeve 40.

[0067] In the embodiments of this application, please refer to Figure 5 The base 10 has at least two connecting holes 14 spaced apart circumferentially along the mounting hole 11, and the cover 20 is detachably connected to the hole wall of the connecting hole 14 by fasteners 50.

[0068] At least two connecting holes 14 are distributed circumferentially along the mounting hole 11. The cover 20 is detachably connected to the hole wall of the connecting hole 14 by a fastener 50. The fastener 50 can be a bolt, and the connecting hole 14 is a threaded hole. The bolt passes through the cover 20 and is threaded into the threaded hole. Bolts have the advantages of being easy to obtain and convenient to install. In addition, the threaded connection can achieve self-locking, making the connection between the cover 20 and the base 10 tighter and more reliable.

[0069] In the embodiments of this application, please refer to Figures 1 to 3 The detection component (not shown) includes a detection pipe and a pressure gauge. The detection pipe allows the fluid detection medium to pass through. The detection channel 12 includes a first channel 121 and a second channel 122 respectively located on both sides of the mounting hole 11. Both the first channel 121 and the second channel 122 are connected to the mounting hole 11. The first channel 121 is connected to the detection pipe, and the second channel 122 is connected to the pressure gauge.

[0070] The first channel 121 and the second channel 122 are respectively located on the left and right sides of the mounting hole 11. Both the first channel 121 and the second channel 122 are connected to the mounting hole 11. The first channel 121 can be connected to the detection pipe, and the second channel 122 is connected to the pressure gauge. The fluid detection medium flows into the first channel 121 of the base 10 through the detection pipe, and then enters the radial hole 611 of the rod body 61 of the rod-shaped part 60 to be tested through the first channel 121. The fluid detection medium can be a gas medium. The pressure gauge is used to detect the pressure value in the base 10. If the one-way valve core 62 is not well sealed, the gas medium will leak from the rod body 61, and the pressure value will drop significantly. If the one-way valve core 62 is well sealed, the gas medium will not leak from the rod body 61, and the pressure value will remain stable or drop very slightly.

[0071] In other embodiments, the detection component can also be an airtightness testing instrument that integrates ventilation and pressure detection. In this case, one of the first channel 121 and the second channel 122 can be blocked, while the other is connected to the airtightness testing instrument for airtightness testing. Alternatively, the detection channel 12 may only have the first channel 121, and the airtightness testing instrument may be connected to the first channel 121.

[0072] In the embodiments of this application, please refer to Figure 1 and Figure 2 The first channel 121 includes a connector section 1211 and a buffer section 1212 arranged sequentially from the outside to the inside. The connector section 1211 is used to connect with the connector of the detection pipeline. The end of the buffer section 1212 facing away from the connector section 1211 is connected to the mounting hole 11, and the buffer section 1212 can be used to buffer the fluid detection medium in the detection pipeline.

[0073] The joint of the detection pipeline is connected to the joint connection section 1211. The end of the buffer section 1212 facing away from the joint connection section 1211 is connected to the mounting hole 11. Furthermore, the buffer section 1212 can buffer the fluid detection medium in the detection pipeline. By setting the buffer section 1212, the fluid detection medium can be buffered, thereby reducing the impact force of the fluid detection medium and making the impact force of the fluid detection medium on the one-way valve core 62 more uniform.

[0074] The detection pipeline may also include a guide pipe section extending from the joint. A pipe section 1213 is provided between the joint connection section 1211 and the buffer section 1212. The pipe section 1213 is used for the guide pipe to extend into. By setting up the guide pipe section, the flow of the fluid detection medium into the first channel 121 from the detection pipeline is guided and buffered. The diameter of the buffer section 1212 can be larger than the diameter of the pipe section 1213, so that the buffer space for the fluid detection medium is larger and the buffering effect is better.

[0075] In this embodiment, the first channel 121 and the second channel 122 are respectively located on opposite sides of the mounting hole 11 and their central axes are on the same straight line. The first channel 121 and the second channel 122 are both connected to the mounting hole 11 at the position opposite to the radial hole 611 of the rod-shaped part 60 to be tested.

[0076] The first channel 121 and the second channel 122 are respectively located on the left and right sides of the mounting hole 11, and the central axes of the first channel 121 and the second channel 122 are on the same straight line, which facilitates the processing of the base 10. The first channel 121 and the second channel 122 are both connected to the mounting hole 11 at the position opposite to the radial hole 611 of the rod-shaped part 60 to be tested, which facilitates the flow of the fluid detection medium into the radial hole 611 of the rod-shaped part 60 to be tested through the first channel 121.

[0077] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0078] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0079] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A sealing detection device, characterized in that, The sealing detection device is used to detect the sealing performance of the internal sealing structure of the rod-shaped part, and the sealing detection device includes: The base (10) has a mounting hole (11) and a detection channel (12), the mounting hole (11) for the rod-shaped part (60) to be tested to extend into, and the detection channel (12) communicating with the mounting hole (11) at a position opposite to the radial hole (611) of the rod-shaped part (60) to be tested; A sealing cap assembly includes a cap body (20) and a sealing ring (30). The cap body (20) has a through hole (232) through which the rod-shaped part (60) to be tested passes and is detachably mounted on the base (10). The sealing ring (30) is used to fit over the rod-shaped part (60) to seal the rod-shaped part (60) to be tested, and the sealing ring (30) is placed between the cap body (20) and the base (10) to seal the cap body (20) and the base (10). The detection component is connected to the detection channel (12) and is used to introduce a fluid detection medium into the detection channel (12).

2. The sealing detection device according to claim 1, characterized in that, The cover (20) includes a first assembled cover (21) and a second assembled cover (22) that are separately arranged. The first assembled cover (21) and the second assembled cover (22) are assembled to form the through hole (232), and both the first assembled cover (21) and the second assembled cover (22) can be detachably installed on the base (10).

3. The sealing detection device according to claim 2, characterized in that, A countersunk hole (231) is formed on the wall of the through hole (232) near the base (10). A first step surface (233) is formed between the countersunk hole (231) and the through hole (232). The rod-shaped part (60) to be tested has a second step surface. The first step surface (233) can abut against the second step surface.

4. The sealing detection device according to claim 1, characterized in that, An installation groove (13) is formed on the outer periphery of the mounting hole (11), and the installation groove (13) is used to place the sealing ring (30).

5. The sealing detection device according to claim 4, characterized in that, The mounting groove (13) is widened in diameter along the direction from the bottom wall of the mounting groove (13) toward the cover (20).

6. The sealing detection device according to claim 4, characterized in that, The sealing detection device further includes a guide sleeve (40), which is used to be fitted onto the rod-shaped part (60) to be tested, so that the sealing ring (30) can slide on the guide sleeve (40) to the position corresponding to the mounting groove (13) of the rod-shaped part (60) to be tested.

7. The sealing detection device according to claim 6, characterized in that, The guide sleeve (40) includes a sleeve portion (41) and a guide head (42). The sleeve portion (41) is sleeved on the outside of the rod-shaped part (60) to be tested. The guide head (42) is connected to the end of the sleeve portion (41) and is used to abut against the end of the rod-shaped part (60) to be tested. The guide head (42) is tapered from the end of the sleeve portion (41) in a direction away from the sleeve portion (41).

8. The sealing detection device according to any one of claims 1 to 7, characterized in that, The detection assembly includes a detection pipe and a pressure gauge. The detection pipe allows the fluid detection medium to pass through. The detection channel (12) includes a first channel (121) and a second channel (122) respectively disposed on both sides of the mounting hole (11). The first channel (121) and the second channel (122) are both connected to the mounting hole (11). The first channel (121) is connected to the detection pipe, and the second channel (122) is connected to the pressure gauge.

9. The sealing detection device according to claim 8, characterized in that, The first channel (121) includes a connector section (1211) and a buffer section (1212) arranged sequentially from the outside to the inside. The connector section (1211) is used to connect with the connector of the detection pipeline. The end of the buffer section (1212) opposite to the connector section (1211) is connected to the mounting hole (11), and the buffer section (1212) can be used to buffer the fluid detection medium in the detection pipeline.

10. The sealing detection device according to claim 8, characterized in that, The first channel (121) and the second channel (122) are respectively located on opposite sides of the mounting hole (11) and their central axes are on the same straight line. The first channel (121) and the second channel (122) are both connected to the mounting hole (11) at the position of the radial hole (611) directly opposite the rod-shaped part (60) to be tested.

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