Cannula device for automated test bench

Abstract

The application provides a pipe inserting device for an automatic test platform, which comprises a base plate and a hollow joint for being inserted into a lower interface of a valve for coal mines, a joint convex ring is arranged in the middle of the hollow joint, a sliding block assembly stepped hole is formed in the base plate corresponding to the position of the joint convex ring, a sliding block is arranged in the sliding block assembly stepped hole, the sliding block is sleeved outside the joint convex ring, a sealing ring is arranged between the sliding block and the joint convex ring, a positioning plate is arranged on the top of the base plate, and the positioning plate is buckled with the base plate. The pipe inserting device for the automatic test platform has a micro-adjusting function of the center axis of the hollow joint under the action of a thrust force, ensures the accurate butt joint of the center line of the hollow joint and the interface, avoids the existence of a jamming phenomenon in the adjustment, and meets the test requirements of the automatic test platform.

Description

Technical Field

[0001] This invention relates to the field of hydraulic valve testing equipment, and more specifically, to a tube insertion device for an automated testing bench. Background Technology

[0002] To improve the production capacity of coal mine valves, the market demand for automated testing benches is increasing. However, in actual coal mine valve testing, automatic pipe insertion remains a technical bottleneck, hindering the automated testing of mining valves. The difficulty lies in the unavoidable error in the center axis of the automated pipe fitting when it aligns with the valve body fitting hole. This prevents precise insertion of the sealing fitting and can easily lead to rigid collisions or jamming under thrust, affecting the automated testing process. Furthermore, valve bodies often have two or more orifices on the same plane, and the relative positions of their center axes can vary. This results in cumulative deviations in the orifice centerlines, and when multiple pipe insertions are performed simultaneously, the accumulated deviations can cause misalignment of the center axes. In addition, the sealing outer diameter of the fitting and the inner diameter of the valve body orifice are in a clearance seal fit. According to national standards, coal mine valves withstand high-pressure sealing during testing, requiring high precision machining of the inner contact surfaces of both, further increasing the difficulty of centerline alignment.

[0003] To improve the automation and insertion accuracy of valve testing in coal mines, invention patent CN112894314B discloses an automatic valve insertion device. The device includes a base plate, on which are mounted a servo electric cylinder for driving a first slider along a first slide rail, a translation cylinder for driving a second slider along a second slide rail, and a lifting cylinder for driving a vertical baffle to rise and fall. Both the first and second slide rails are laid flat on the base plate, with the baffle located between the first and second sliders. A fixing block is also fixed on the base plate between the second slider and the baffle. The second slider has several positioning holes for clamping the air tube. The fixing block has through holes corresponding to the positioning holes, with two clamping flaps in each through hole. A sleeve is fixed to the end of the positioning hole near the fixing block, and a draft angle is provided at the end of the clamping flap near the sleeve. A valve fixture is mounted on the first slider. This automatic valve insertion device significantly improves the efficiency of valve insertion, but it still has defects such as low accuracy in aligning the joint with the center line of the orifice and jamming during adjustment. Summary of the Invention

[0004] To improve the accuracy of the alignment between the connector and the orifice centerline, and to enable the connector to have a fine-tuning function during insertion, thus avoiding jamming defects during adjustment, the technical solution adopted in this invention is: a tube insertion device for an automated test bench, comprising a base plate and a hollow connector for insertion into the lower interface of a coal mine valve. The hollow connector has a connector protrusion ring in the middle. The base plate has a slider assembly step hole corresponding to the position of the connector protrusion ring. A slider is disposed in the slider assembly step hole and is sleeved on the outside of the connector protrusion ring. A sealing ring is disposed between the slider and the connector protrusion ring. A positioning plate is disposed on the top of the base plate and is engaged with the base plate.

[0005] Based on the above, in order to facilitate positioning, a positioning plate boss is provided on one side of the positioning plate, and a connector assembly hole is provided on the positioning plate through the positioning plate boss, and the hollow connector is provided through the connector assembly hole.

[0006] Based on the above, a slider step hole is provided inside the slider, and the top of the slider step hole cooperates with the positioning plate boss.

[0007] Based on the above, in order to facilitate the left and right position adjustment of the hollow connector, the sealing ring is disposed between the outer side of the connector protrusion ring and the inner sidewall of the slider step hole.

[0008] Based on the above, in order to facilitate installation and adjustment, the lower end of the hollow connector extends out of the base plate, and the lower end of the hollow connector is connected to a threaded connector for connecting an external oil supply pipe.

[0009] Based on the above, in order to facilitate position adjustment, the upper part of the hollow connector is clearance-fitted with the connector assembly hole, the lower part of the hollow connector is clearance-fitted with the slider step hole, and the bottom of the hollow connector is clearance-fitted with the slider assembly step hole.

[0010] Based on the above, a guide post is provided at the outer end of the base plate, an upper pressure plate is slidably provided on the guide post, and a plug is provided on the upper pressure plate.

[0011] Based on the above, in order to facilitate the plugging of disconnected interfaces during testing, a plug hydraulic cylinder is connected to the top of the upper pressure plate, and a hydraulic cylinder fixing plate is provided on the top of the guide post.

[0012] Based on the above, in order to facilitate disassembly, the plug hydraulic cylinder is connected to the upper pressure plate via a connecting block and bolts.

[0013] The slider is made of non-stainless steel, and the sealing ring is made of elastic rubber.

[0014] This invention represents a substantial improvement over existing technologies. Specifically, the tube insertion device for automated testing benches provided by this invention, with its hollow connector and positioning plate having a clearance fit, an elastic sealing ring, and a non-stainless steel material for the slider, allows for micro-adjustment of the hollow connector's central axis under thrust. This adjustment range meets the requirements, ensuring precise alignment between the connector and the orifice's centerline, and eliminating jamming during adjustment, thus satisfying the testing requirements of automated testing benches. Furthermore, the device has a simple structure and is convenient to maintain and install.

[0015] Simultaneously, after the insertion is completed and the hollow connector is withdrawn from the coal mine valve body under tension, it quickly returns to its original central axis position, without affecting subsequent valve tests, ensuring that the central axis of the connector is within the required range for each test. This device is suitable for both single-hole and multi-hole connections, and has a wide range of applications. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the tube insertion device for automated test bench and the valve assembly for coal mines provided by the present invention.

[0017] Figure 2 This is a cross-sectional structural diagram of the tube insertion device for an automated test bench provided by the present invention.

[0018] Figure 3 This is a partial structural diagram of the tube insertion device for an automated testing bench provided by the present invention.

[0019] Figure 4 This is a schematic diagram of the insertion joint structure in the insertion device for an automated test bench provided by the present invention.

[0020] Figure 5 This is a schematic diagram of the slider structure in the tube insertion device for an automated test bench provided by the present invention.

[0021] Figure 6 This is a schematic diagram of the positioning plate structure in the tube insertion device for an automated test bench provided by the present invention.

[0022] In the diagram: 1. Plug hydraulic cylinder; 2. Hydraulic cylinder fixing plate; 3. Guide post; 4. Connecting block; 5. Plug; 6. Upper pressure plate; 7. Upper interface; 8. Coal mine valve; 9. Threaded connector; 10. Slider; 11. Base plate; 12. Hollow connector; 13. Positioning plate; 14. Sealing ring; 15. Slider assembly step hole; 16. Connector protruding ring; 17. Liquid passage; 18. Slider step hole; 19. Connector assembly hole. Detailed Implementation

[0023] The technical solution of the present invention will be further described in detail below through specific embodiments.

[0024] Example 1 This embodiment provides a cannulation device for an automated testing bench, such as... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the device includes a base plate 11 and a hollow connector 12 for insertion into the lower interface of a coal mine valve 8. A connector protrusion 16 is provided in the middle of the hollow connector 12. A liquid channel 17 is formed inside the hollow connector 12. A slider assembly step hole 15 is provided on the base plate 11 corresponding to the position of the connector protrusion 16.

[0025] A slider 10 is provided inside the step hole 15 of the slider assembly, and the slider 10 is sleeved on the outside of the joint protrusion ring 16. A sealing ring 14 is provided between the slider 10 and the joint protrusion ring 16, and a positioning plate 13 is provided on the top of the base plate 11, and the positioning plate 13 is fastened to the base plate 11.

[0026] For ease of positioning, a positioning plate boss is provided on one side of the positioning plate 13, and a connector assembly hole 19 is provided on the positioning plate through the positioning plate boss. The hollow connector 12 is installed through the connector assembly hole 19.

[0027] like Figure 5 and Figure 6 As shown, the slider 10 has a slider step hole 18 inside, and the top of the slider step hole 18 cooperates with the positioning plate boss.

[0028] To facilitate left and right position adjustment of the hollow connector 12, the sealing ring 14 is disposed between the outer side of the connector protrusion ring 16 and the inner sidewall of the slider step hole 18. A guide post 3 is provided at the outer end of the base plate 11, and an upper pressure plate 6 is slidably disposed on the guide post 3. A plug 5 is provided on the upper pressure plate 6 for sealing the interface 7 of the coal mine valve 8 during testing.

[0029] To facilitate plugging of disconnected interfaces during testing, a plug hydraulic cylinder 1 is connected to the top of the upper pressure plate 6, and a hydraulic cylinder fixing plate 2 is provided on the top of the guide post 3. The plug hydraulic cylinder 1 is connected to the upper pressure plate 6 via a connecting block 4 and bolts.

[0030] Example 2 This embodiment provides a tube insertion device for an automated test bench. The main difference from Embodiment 1 is that, in this embodiment, for ease of installation and adjustment, the lower end of the hollow connector extends out of the base plate, and the lower end of the hollow connector is connected to a threaded connector 9 for connecting an external oil supply pipe.

[0031] Example 3 This embodiment provides a tube insertion device for an automated test bench. The main difference from Embodiment 1 or Embodiment 2 is that, in this embodiment, in order to facilitate position adjustment, the upper part of the hollow connector is clearance-fitted with the connector assembly hole, the lower part of the hollow connector is clearance-fitted with the slider step hole, and the bottom of the hollow connector is clearance-fitted with the slider assembly step hole.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A tube insertion device for an automated test bench, comprising a base plate and a hollow connector for insertion into a lower interface of a coal mine valve, characterized in that: The hollow connector has a connector protrusion ring in the middle. A slider assembly step hole is formed on the base plate corresponding to the connector protrusion ring. A slider is placed inside the slider assembly step hole and is fitted onto the outside of the connector protrusion ring. A sealing ring is provided between the slider and the connector protrusion ring. A positioning plate is provided on the top of the base plate and is engaged with the base plate. A guide post is provided at the outer end of the base plate, and an upper pressure plate is slidably mounted on the guide post. A plug is provided on the upper pressure plate. A plug hydraulic cylinder is connected to the top of the upper pressure plate, and a hydraulic cylinder fixing plate is provided on the top of the guide post. The plug hydraulic cylinder is connected to the upper pressure plate via a connecting block and bolts. A positioning plate boss is provided on one side of the positioning plate, and a connector assembly hole is formed through the positioning plate boss. The hollow connector passes through the connector assembly hole. A slider step hole is formed inside the slider, and the top of the slider step hole mates with the positioning plate boss.

2. The tube insertion device for an automated test bench according to claim 1, characterized in that: The sealing ring is disposed between the outer side of the joint protrusion and the inner sidewall of the slider step hole.

3. The tube insertion device for an automated test bench according to claim 2, characterized in that: The lower end of the hollow connector extends out of the base plate, and the lower end of the hollow connector is connected to a threaded connector for connecting an external oil supply pipe.

4. The insertion device for an automated test bench according to claim 3, characterized in that: The upper part of the hollow connector is clearance-fitted with the connector assembly hole, and the lower part of the hollow connector is clearance-fitted with the slider step hole.

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