Copper shell rotary joint sealing detection device and detection method thereof

Abstract

The invention relates to the technical field of sealing detection, and discloses a copper shell rotary joint sealing detection device and a detection method thereof.The copper shell rotary joint sealing detection device comprises a base, the top of the base is fixedly connected with a connecting plate, the front end of the connecting plate is fixedly connected with a first connecting ring, and the inner wall of the first connecting ring is fixedly connected with a detection assembly; the detection assembly comprises a first hollow column, the outer wall of the first hollow column is fixedly connected with the first connecting ring, the top of the first hollow column is fixedly connected with a second hollow column, and the bottom of the first hollow column is fixedly connected with a motor. The motion state under the actual working condition is truly simulated in the detection process; compared with static detection, rotation is introduced, so that weak links which are difficult to perceive in a static state can be exposed, the influence of dynamic factors on the sealing performance can be revealed, and the sealing stability of the rotary joint under long-term dynamic operation is ensured.

Description

Technical Field

[0001] This invention relates to the field of sealing testing technology, specifically to a copper shell rotary joint sealing testing device and its testing method. Background Technology

[0002] Copper-shell rotary joints are critical mechanical components widely used in hydraulic systems, cooling systems, machine tool machining centers, and other applications requiring relative rotational motion and fluid (oil, water, coolant, etc.) transmission. Their sealing performance directly affects the safe operation of the entire equipment, preventing leaks that could lead to environmental pollution, resource waste, or even equipment failure.

[0003] Patent application CN201310240588.3 discloses a rotary joint sealing test device and its test method. The test device includes: a chassis, which is installed in a sealed manner on the air inlet of the rotary joint; a water injection assembly installed on the chassis for injecting clean water into the rotary joint; a sealing baffle, which is installed in a sealed manner on a locking member at the tail of the rotary joint, and the sealing baffle has a central hole at its center; and a central tube, which is inserted from the central hole of the sealing baffle into a polytetrafluoroethylene sealing sleeve that is sealed to the rotary joint.

[0004] Most existing copper shell rotary joint sealing testing equipment can only perform tests under static conditions and cannot simulate its rotational motion under real working conditions. This results in many sealing defects that only appear during dynamic operation being unable to be effectively detected, which is not conducive to a comprehensive evaluation of the product's sealing performance and long-term reliability. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a copper shell rotary joint sealing detection device and method to solve the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a copper shell rotary joint sealing detection device and its detection method, comprising a base, a connecting plate fixedly connected to the top of the base, a first connecting ring fixedly connected to the front end of the connecting plate, and a detection component fixedly connected to the inner wall of the first connecting ring;

[0007] The detection component includes:

[0008] A first hollow column has its outer wall fixedly connected to a first connecting ring. A second hollow column is fixedly connected to the top of the first hollow column, and a motor is fixedly connected to the bottom of the first hollow column. A second connecting ring is fixedly connected to the inner wall of the second hollow column, and the inner wall of the second connecting ring is movably connected to a motor. The output end of the motor is fixedly connected to the second connecting ring. The motor is used to drive the central component to rotate. By setting a detection component, the motion state under actual working conditions is realistically simulated during the detection process. Compared with static detection, by introducing rotation, not only can weak points that are difficult to detect when stationary be exposed, but also the influence of dynamic factors on sealing performance can be revealed, ensuring the sealing stability of the rotary joint under long-term dynamic operation.

[0009] According to the above technical solution, a first push rod is fixedly connected to the top of the connecting plate, a second push rod is fixedly connected to the top of the connecting plate, and a movable component is fixedly connected to the top of the second push rod. The second push rod can control the height of the movable component, while the first push rod can control the height of the first movable plate. By setting a detection component, the downward pressing action makes the end face of the rotary joint fit with the first and second sealing rings on the central component, thereby effectively filling the gap of the contact surface, forming a reliable sealing barrier, ensuring that all supplied gas is used for leak detection, and avoiding misjudgment due to seal failure.

[0010] According to the above technical solution, a moving device is fixedly connected to the front end of the first movable plate, and a fixed component is movably connected to the front end of the moving device. There are two fixed components, which are symmetrically arranged on the moving device. The moving device can control the movement of the fixed components.

[0011] According to the above technical solution, the fixing component includes a slider, the outer wall of the slider is movably connected to the moving device, a first right-angle plate is fixedly connected to the side of the slider away from the moving device, and a clamping block is fixedly connected to the side of the first right-angle plate away from the slider. The clamping block is made of flexible material. The moving device can drive the slider to move and clamp the rotary joint through the clamping block.

[0012] According to the above technical solution, the movable component includes a second movable plate, the outer wall of the first right-angle plate is movably connected to the connecting plate, the top of the second movable plate is fixedly connected to the second right-angle plate, and the front end of the first right-angle plate is fixedly connected to an air intake component, wherein the air intake component is used to supply gas to the rotary joint.

[0013] According to the above technical solution, the central component includes a third hollow column, a first sealing ring is fixedly connected to the top of the third hollow column, a second sealing ring is fixedly connected to the inner wall of the top of the third hollow column, and a notch is opened on the outer wall of the bottom of the third hollow column. The first and second sealing rings can seal the bottom of the rotary joint. By setting the central component, the elastic component at its bottom can dynamically adjust the air pressure inside the rotary joint using its own elasticity. When the internal pressure exceeds a preset threshold, the elastic component can adaptively release pressure. At the same time, the pressure support it provides can prevent the leakage point from being unable to be effectively exposed due to the detection air pressure being too low, thereby improving the authenticity of the seal detection.

[0014] According to the above technical solution, a baffle plate is fixedly connected to the inner wall of the third hollow column, and an elastic component is fixedly connected to the top of the baffle plate. The outer wall of the elastic component is movably connected to the third hollow column, wherein the elastic component can block the gap.

[0015] According to the above technical solution, a connecting block is fixedly connected to the bottom of the third hollow column, and a sliding column is fixedly connected to the bottom of the connecting block. A sliding groove is provided on the outer wall of the sliding column, and a sliding frame is movably connected to the outer wall of the sliding column. A protruding strip is fixedly connected to the inner wall of the sliding frame, and the outer wall of the protruding strip is movably connected to the sliding groove. A spring is fixedly connected to the inner wall of the sliding column, and the bottom of the spring is fixedly connected to the protruding strip. The output end of the motor is fixedly connected to the sliding frame. When the motor drives the protruding strip to rotate, it can drive the central assembly to rotate as a whole. By setting the central assembly, the spring 2110 at the bottom applies a continuous upward pushing force to the sliding column through elasticity, thereby providing stable bottom support for the rotary joint during the detection process. This ensures that the first sealing ring, the second sealing ring, and the end face of the rotary joint always remain tightly fitted, enhancing the sealing effect at the interface. At the same time, after the detection is completed and the pressing mechanism is removed, the spring force can push the central assembly to automatically reset to the initial height, facilitating quick clamping and positioning during the next detection.

[0016] A method for testing the seal of a copper shell rotary joint includes the following steps:

[0017] S1. When performing a sealing test on the copper shell rotary joint, the rotary joint is first clamped and positioned by the fixed component driven by the moving device; then the first push rod drives the rotary joint to move downward so that it fits against the top of the central component. During the downward pressing process, the third hollow column of the central component descends accordingly, so that the rotating end of the rotary joint is immersed in the water between the second hollow column and the second connecting ring.

[0018] S2. Then, activate the second push rod to drive the movable component to descend, so that the air intake component is embedded in the air intake port at the tail of the rotary joint, and apply a certain pressure to the tail of the joint to ensure good sealing contact.

[0019] S3. Start the motor to drive the central component to rotate, thereby causing the rotating end at the bottom of the copper shell rotary joint to rotate synchronously, in order to simulate the operating state of the rotary joint under actual working conditions.

[0020] S4. Supply gas into the rotary joint through the air intake assembly, and at the same time observe whether air bubbles are generated in the water between the second hollow column and the second connecting ring to determine the sealing performance of the rotary joint under dynamic conditions.

[0021] Compared with the prior art, the present invention provides a copper shell rotary joint sealing detection device and detection method, which has the following beneficial effects:

[0022] 1. This invention sets up a detection component to realistically simulate the motion state under actual working conditions during the detection process. Compared with static detection, by introducing rotation, it can not only expose weak points that are difficult to detect when stationary, but also reveal the influence of dynamic factors on sealing performance, ensuring the sealing stability of the rotary joint under long-term dynamic operation.

[0023] 2. By setting a central component and an elastic component at its bottom, the present invention dynamically adjusts the air pressure inside the rotary joint using its own elasticity. When the internal pressure exceeds a preset threshold, the elastic component can adaptively release pressure. At the same time, the pressure support it provides can prevent the leakage point from being ineffectively exposed due to the detection air pressure being too low, thereby improving the authenticity of the seal detection.

[0024] 3. By setting up a detection component, the present invention uses a pressing action to make the end face of the rotary joint fit with the first and second sealing rings on the central component, thereby effectively filling the gap of the contact surface, forming a reliable sealing barrier, ensuring that all supplied gas is used for leak detection, and avoiding misjudgment due to seal failure.

[0025] 4. By setting a central component, the spring 2110 at the bottom applies a continuous upward pushing force to the sliding column through elasticity, thereby providing stable bottom support for the rotary joint during the testing process. This ensures that the first sealing ring, the second sealing ring and the end face of the rotary joint always remain in close contact, enhancing the sealing effect at the interface. At the same time, after the testing is completed and the pressing mechanism is removed, the elastic force of the spring can push the central component to automatically reset to the initial height, facilitating quick clamping and positioning during the next testing. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a partial structural schematic diagram of the present invention;

[0029] Figure 3 This is a schematic diagram of the fixing component of the present invention;

[0030] Figure 4 This is a schematic diagram of the active components of the present invention;

[0031] Figure 5 This is a schematic diagram of the detection component of the present invention;

[0032] Figure 6 This is a cross-sectional view of the detection component of the present invention;

[0033] Figure 7 Schematic diagram of the central component of the present invention Figure 1 ;

[0034] Figure 8 Schematic diagram of the central component of the present invention Figure 2 ;

[0035] Figure 9 Cross-sectional view of the central component of the present invention Figure 1 ;

[0036] Figure 10 Cross-sectional view of the central component of the present invention Figure 2 .

[0037] In the diagram: 1. Base; 101. Connecting plate; 102. First connecting ring; 103. First push rod; 104. First movable plate; 105. Second push rod; 106. Moving device; 11. Fixing assembly; 111. Slider; 112. First right-angle plate; 113. Clamping block; 12. Movable assembly; 121. Second movable plate; 122. Second right-angle plate; 123. Air intake assembly; 2. Detection assembly; 201. 202. First hollow column; 203. Motor; 204. Second hollow column; 205. Second connecting ring; 21. Central assembly; 216. Third hollow column; 217. Notch; 218. First sealing ring; 219. Second sealing ring; 210. Baffle plate; 2111. Elastic assembly; 2112. Connecting block; 2113. Sliding column; 2114. Sliding groove; 2115. Spring; 2116. Sliding frame; 2117. Raised strip. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0039] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0040] In this invention, unless otherwise explicitly 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] Example 1: See Figures 1-4This invention provides a technical solution: a copper shell rotary joint sealing detection device and its detection method, comprising a base 1, a connecting plate 101 fixedly connected to the top of the base 1, a first connecting ring 102 fixedly connected to the front end of the connecting plate 101, a detection component 2 fixedly connected to the inner wall of the first connecting ring 102, a first push rod 103 fixedly connected to the top of the connecting plate 101, a second push rod 105 fixedly connected to the top of the connecting plate 101, a movable component 12 fixedly connected to the top of the second push rod 105, wherein the second push rod 105 can control the height of the movable component 12, and the first push rod 103 can control the height of the first movable plate 104, a moving device 106 fixedly connected to the front end of the first movable plate 104, and a fixed component 11 movably connected to the front end of the moving device 106, wherein there are two fixed components 11, which are symmetrically arranged on the moving device 106, and the moving device 106 can control the movement of the fixed components 11; the copper shell rotary joint to be tested is placed... Placed between two sets of fixed components 11, the moving device 106 is activated. The moving device 106 drives the symmetrically arranged sliders 111 to move towards each other. The sliders 111 drive the first right-angle plate 112 and the clamping block 113 to move closer to the rotary joint until the clamping block 113 is in close contact with the rotary joint housing. After the rotary joint is clamped, the first push rod 103 is activated. The first push rod 103 pushes the first movable plate 104 downward, thereby driving the entire fixed component 11 and the rotary joint to descend as a whole. When the rotary joint descends to the predetermined position, its rotating end face contacts the top of the central component 21 in the detection component 2, and forms a tight fit under the continuous downward pressure of the first push rod 103, ensuring the sealing in the subsequent detection process. Subsequently, the second push rod 105 is activated. The second push rod 105 pushes the movable component 12 downward, so that the air intake component 123 is aligned with and embedded in the air intake at the tail of the rotary joint, and maintains a sealed contact under the pressure of the second push rod 105, preventing gas from leaking from the interface during the detection process.

[0042] The fixing component 11 includes a slider 111, the outer wall of which is movably connected to the moving device 106. A first right-angle plate 112 is fixedly connected to the side of the slider 111 away from the moving device 106, and a clamping block 113 is fixedly connected to the side of the first right-angle plate 112 away from the slider 111. The clamping block 113 is made of flexible material. The moving device 106 can drive the slider 111 to move and clamp the rotary joint through the clamping block 113.

[0043] The movable component 12 includes a second movable plate 121, the outer wall of the first right-angle plate 112 is movably connected to the connecting plate 101, the top of the second movable plate 121 is fixedly connected to a second right-angle plate 122, and the front end of the first right-angle plate 112 is fixedly connected to an air intake component 123, wherein the air intake component 123 is used to supply gas to the rotary joint.

[0044] Example 2: Please refer to Figures 5-10 Based on Embodiment 1, the present invention provides a technical solution: the detection component 2 includes: a first hollow column 201, the outer wall of the first hollow column 201 is fixedly connected to a first connecting ring 102, a second hollow column 203 is fixedly connected to the top of the first hollow column 201, a motor 202 is fixedly connected to the bottom of the first hollow column 201, a second connecting ring 204 is fixedly connected to the inner wall of the second hollow column 203, a 22 is movably connected to the inner wall of the second connecting ring 204, and the output end of the motor 202 is fixedly connected to the second connecting ring 204, wherein the motor 202 is used to drive the central component 21 to rotate.

[0045] The central component 21 includes a third hollow column 211. A first sealing ring 213 is fixedly connected to the top of the third hollow column 211, and a second sealing ring 214 is fixedly connected to the inner wall of the top of the third hollow column 211. A notch 212 is provided on the outer wall of the bottom of the third hollow column 211. The first sealing ring 213 and the second sealing ring 214 can seal the bottom of the rotary joint. A baffle plate 215 is fixedly connected to the inner wall of the third hollow column 211, and an elastic component 216 is fixedly connected to the top of the baffle plate 215. The outer wall of the elastic component 216 is flexible with the third hollow column 211. The connection is as follows: the elastic component 216 can block the notch 212; the bottom of the third hollow column 211 is fixedly connected to the connecting block 217; the bottom of the connecting block 217 is fixedly connected to the sliding column 218; the outer wall of the sliding column 218 has a groove 219; the outer wall of the sliding column 218 is movably connected to the sliding frame 2111; the inner wall of the sliding frame 2111 is fixedly connected to the protruding strip 2112; the outer wall of the protruding strip 2112 is movably connected to the groove 219; the inner wall of the sliding column 218 is fixedly connected to the spring 2110; the bottom of the spring 2110 is connected to the protruding strip 2112. 112 is fixedly connected, wherein the output end of the motor 202 is fixedly connected to the sliding frame 2111. When the motor 202 drives the protruding strip 2112 to rotate, it can drive the central component 21 to rotate as a whole. After the rotary joint is fixed and the rotating end of the rotary joint is immersed in the water between the second hollow column 203 and the second connecting ring 204, the motor 202 is started. The output end of the motor 202 is fixedly connected to the sliding frame 2111, and the protruding strip 2112 is engaged in the sliding groove 219 of the sliding column 218. When the motor 202 rotates, the protruding strip 2112 drives the sliding frame 2111 to rotate. The sliding column 218 rotates synchronously, and the rotational power of the sliding column 218 is transmitted to the third hollow column 211 through the connecting block 217, thereby driving the entire central assembly 21 to rotate. Subsequently, compressed gas is supplied to the rotary joint through the air intake assembly 123. If there is a sealing defect in the rotary joint, the gas will escape through the leak point and form bubbles around the rotating end immersed in water. When the air pressure in the detection chamber is too high, the elastic component 216 undergoes elastic deformation under the action of air pressure, forming a small pressure relief channel at the notch 212, avoiding damage to the rotary joint or detection device due to excessive air pressure. At the same time, the back pressure support provided by the elastic component 216 can prevent the leakage point from being ineffectively exposed due to excessively low detection air pressure, ensuring the accuracy of the detection results.

[0046] A method for testing the seal of a copper shell rotary joint includes the following steps:

[0047] S1. When performing a sealing test on the copper shell rotary joint, the moving device 106 first drives the fixing component 11 to clamp and position the rotary joint; then the first push rod 103 drives the rotary joint to move downward, so that it fits against the top of the central component 21. During the downward pressing process, the third hollow column 211 of the central component 21 descends accordingly, so that the rotating end of the rotary joint is immersed in the water between the second hollow column 203 and the second connecting ring 204.

[0048] S2. Then, activate the second push rod 105 to drive the movable component 12 to descend, so that the air intake component 123 is embedded in the air intake port at the tail of the rotary joint, and apply a certain pressure to the tail of the joint to ensure good sealing contact.

[0049] S3. Start motor 202 to drive the central component 21 to rotate, thereby driving the rotating end at the bottom of the copper shell rotary joint to rotate synchronously, so as to simulate the operating state of the rotary joint under actual working conditions.

[0050] S4. Gas is supplied to the rotary joint through the air intake assembly 123, and at the same time, it is observed whether air bubbles are generated in the water between the second hollow column 203 and the second connecting ring 204 to determine the sealing performance of the rotary joint under dynamic conditions.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0052] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A copper shell rotary joint sealing detection device, comprising a base (1), wherein a connecting plate (101) is fixedly connected to the top of the base (1), and a first connecting ring (102) is fixedly connected to the front end of the connecting plate (101), characterized in that, The inner wall of the first connecting ring (102) is fixedly connected to the detection component (2); The detection component (2) includes: A first hollow column (201) is fixedly connected to a first connecting ring (102) on its outer wall. A second hollow column (203) is fixedly connected to the top of the first hollow column (201). A motor (202) is fixedly connected to the bottom of the first hollow column (201). A second connecting ring (204) is fixedly connected to the inner wall of the second hollow column (203). A 22 is movably connected to the inner wall of the second connecting ring (204). The output end of the motor (202) is fixedly connected to the second connecting ring (204). The motor (202) is used to drive the central assembly (21) to rotate.

2. The copper shell rotary joint sealing detection device according to claim 1, characterized in that: The top of the connecting plate (101) is fixedly connected to a first push rod (103), and the top of the connecting plate (101) is fixedly connected to a second push rod (105). The top of the second push rod (105) is fixedly connected to a movable component (12). The second push rod (105) can control the height of the movable component (12), while the first push rod (103) can control the height of the first movable plate (104).

3. The copper shell rotary joint sealing detection device according to claim 2, characterized in that: The front end of the first movable plate (104) is fixedly connected to a moving device (106), and the front end of the moving device (106) is movably connected to a fixed component (11). There are two fixed components (11), and the two fixed components (11) are symmetrically arranged on the moving device (106). The moving device (106) can control the movement of the fixed components (11).

4. The copper shell rotary joint sealing detection device according to claim 3, characterized in that: The fixing component (11) includes a slider (111), the outer wall of which is movably connected to the moving device (106). A first right-angle plate (112) is fixedly connected to the side of the slider (111) away from the moving device (106), and a clamping block (113) is fixedly connected to the side of the first right-angle plate (112) away from the slider (111). The clamping block (113) is made of flexible material. The moving device (106) can drive the slider (111) to move and clamp the rotary joint through the clamping block (113).

5. The copper shell rotary joint sealing detection device according to claim 4, characterized in that: The movable component (12) includes a second movable plate (121), the outer wall of the first right-angle plate (112) is movably connected to the connecting plate (101), the top of the second movable plate (121) is fixedly connected to a second right-angle plate (122), and the front end of the first right-angle plate (112) is fixedly connected to an air intake component (123), wherein the air intake component (123) is used to supply gas to the rotary joint.

6. The copper shell rotary joint sealing detection device according to claim 5, characterized in that: The central component (21) includes a third hollow column (211), the top of which is fixedly connected to a first sealing ring (213), and the inner wall of the top of the third hollow column (211) is fixedly connected to a second sealing ring (214). The outer wall of the bottom of the third hollow column (211) has a notch (212). The first sealing ring (213) and the second sealing ring (214) can seal the bottom of the rotary joint.

7. The copper shell rotary joint sealing detection device according to claim 6, characterized in that: The inner wall of the third hollow column (211) is fixedly connected to a baffle plate (215), and the top of the baffle plate (215) is fixedly connected to an elastic component (216). The outer wall of the elastic component (216) is movably connected to the third hollow column (211), wherein the elastic component (216) can block the notch (212).

8. The copper shell rotary joint sealing detection device according to claim 7, characterized in that: The bottom of the third hollow column (211) is fixedly connected to a connecting block (217), and the bottom of the connecting block (217) is fixedly connected to a sliding column (218). The outer wall of the sliding column (218) is provided with a sliding groove (219). The outer wall of the sliding column (218) is movably connected to a sliding frame (2111). The inner wall of the sliding frame (2111) is fixedly connected to a protruding strip (2112). The outer wall of the protruding strip (2112) is movably connected to the sliding groove (219). The inner wall of the sliding column (218) is fixedly connected to a spring (2110). The bottom of the spring (2110) is fixedly connected to the protruding strip (2112). The output end of the motor (202) is fixedly connected to the sliding frame (2111). When the motor (202) drives the protruding strip (2112) to rotate, it can drive the central component (21) to rotate as a whole.

9. The method for testing the seal of a copper shell rotary joint according to claim 8, characterized in that, Includes the following steps: S1. When performing a sealing test on the copper shell rotary joint, the fixed assembly (11) is first driven by the moving device (106) to clamp and position the rotary joint; then the first push rod (103) drives the rotary joint to move downward so that it fits against the top of the central assembly (21). During the downward pressing process, the third hollow column (211) of the central assembly (21) descends accordingly, so that the rotating end of the rotary joint is immersed in the water between the second hollow column (203) and the second connecting ring (204). S2. Then, activate the second push rod (105) to drive the movable component (12) to descend, so that the air intake component (123) is embedded in the air intake port at the tail of the rotary joint, and apply a certain pressure to the tail of the joint to ensure good sealing contact. S3. Start the motor (202) to drive the central component (21) to rotate, thereby driving the rotating end at the bottom of the copper shell rotary joint to rotate synchronously, so as to simulate the operating state of the rotary joint under actual working conditions. S4. Gas is supplied to the inside of the rotary joint through the air intake assembly (123), and at the same time, it is observed whether air bubbles are generated in the water between the second hollow column (203) and the second connecting ring (204) to determine the sealing performance of the rotary joint under dynamic conditions.

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