Mining high-pressure rubber hose detection equipment

Abstract

The mining high-pressure rubber hose detection equipment comprises a pressure test cabin, and containing frames are symmetrically arranged at the left end and the right end in the pressure test cabin; a plurality of clamping and sealing devices are arranged on the upper surface of the accommodating frame; the clamping and sealing device comprises a cylindrical base, an injection molding pipe is fixed in the base in the axial direction in a penetrating mode, and the portion, on the upper side of the base, of the injection molding pipe is slidably sleeved with a sealing mechanism. A plurality of groups of clamping mechanisms are uniformly arranged on the base along the circumference; each group of clamping mechanism comprises a driving mechanism, a vertical sliding assembly, a turning clamping assembly and a sealing mechanism driving assembly; the base is provided with a vertical sliding groove, a turning clamping assembly containing cavity and a sealing mechanism driving assembly containing cavity. According to the invention, joint nuts at the ends of various hydraulic hoses with conventional calibers can be safely and effectively sealed and clamped, and safe and effective high-pressure resistance and air tightness detection can be carried out on mining high-pressure rubber hoses with various specifications.

Description

Technical Field

[0001] This invention relates to the field of hose testing equipment, and more particularly to a testing equipment for high-pressure rubber hoses used in mining. Background Technology

[0002] High-pressure rubber hoses are made of multiple layers of rubber combined with metal and non-metal materials through a special process. Due to the inherent physical properties of the inner rubber layer, they reduce the effects of the transported medium on the pipeline, such as friction, impact, and corrosion. Furthermore, rubber hoses are flexible, making them widely used in the special working conditions of mineral processing and transportation.

[0003] The liquid pressure inside high-pressure rubber hoses used in mining is high during operation, with hydraulic pump stations often operating at pressures exceeding 30 MPa. Due to the instability and impact of the hydraulic pump, the high-pressure rubber hoses will withstand extremely high instantaneous pressure. If the high-pressure rubber hose assembly has quality defects during production (pinholes, unstable dimensions) or if the crimping amount is incorrect during crimping, accidents such as pinhole injuries, hose bursts, detachment, and rupture may occur. The high-pressure, high-speed liquid ejected from the pinholes or hose can cause significant harm to the human body. The high-pressure hose whipping phenomenon caused by hose detachment can also cause serious injury to nearby personnel. Therefore, high-pressure rubber hoses need to be tested for high-pressure resistance and airtightness before leaving the factory to avoid safety accidents. Currently, the testing of the high-pressure resistance and airtightness of mining high-pressure rubber hoses is mainly done manually, one hose at a time. Furthermore, due to the fixed size of the hose joint structure, testing can only be performed on rubber hoses of a specific diameter. Existing testing equipment is time-consuming, labor-intensive, inefficient, and poses safety hazards to operators. Patent application number 20231026668.X discloses a fire-fighting pipe fitting pressure testing machine. This technology features a sealing seat with an installation groove at its upper end. An electric field generator and a flexible bladder are installed within the installation groove, which is filled with electrorheological fluid. Several first sliding grooves are formed on the inner wall of the installation groove, communicating with the flexible bladder. Each first sliding groove contains a return spring and a sliding plate. A protrusion is located at the center of the installation groove, with a second sliding groove formed on it. The inner wall of the second sliding groove is embedded with a pressure relief valve and a control valve, communicating with the flexible bladder. The second sliding groove contains a slider, a second spring, a conductor block, and a sealing plate. The protrusion has a fluid passage hole connected to a pressure pump. This fire-fighting pipe fitting pressure testing machine simulates actual working conditions by using the flexible bladder and the electrorheological fluid to push the sliding plate against the fire-fighting pipe fitting under pressure. Furthermore, by detecting the sealing pressure between the flexible bladder and the fire-fighting pipe fitting, it ensures a seal while preventing damage to the flexible bladder due to excessive pressure.

[0004] While the above-mentioned technologies can effectively pressure test pipe fittings, they cannot meet the pressure testing requirements of pipe fittings of different specifications, have poor versatility, and pose certain safety hazards. Summary of the Invention

[0005] The purpose of this invention is to provide a testing device for high-pressure rubber hoses used in mining, which can safely and effectively seal and clamp the connector nuts at the ends of various conventional diameter hydraulic hoses, and realize safe and effective testing of the high pressure resistance and airtightness of high-pressure rubber hoses of various specifications.

[0006] The present invention adopts the following technical solution: A testing device for high-pressure rubber hoses used in mining includes a pressure testing chamber with symmetrically arranged receiving frames at both ends. Multiple clamping and sealing devices are arranged on the upper surface of the receiving frames. Each clamping and sealing device includes a cylindrical base with an injection pipe axially fixed inside. The inlet ends of the injection pipes in the pressure-supply side receiving frame are connected to a pressure-supplying mechanism, and the outlet ends of the injection pipes in the pressure-return side receiving frame are connected to a pressure-returning mechanism. A sealing mechanism is slidably fitted onto the injection pipe on the upper side of the base. Multiple sets of clamping mechanisms are also evenly arranged along the circumference of the base. Each clamping mechanism includes a driving mechanism, a vertical sliding component, a reversing clamping component, and a sealing mechanism driving component. Multiple sets of vertical sliding grooves are correspondingly arranged along the axial direction on the cylindrical surface of the base. Multiple sets of reversing clamping component receiving cavities are correspondingly arranged along the axial direction on the upper end surface of the base. Multiple sets of sealing mechanism driving component receiving cavities are correspondingly arranged along the axial direction inside the base. The drive mechanism drives the vertical sliding component to move synchronously upward along the vertical sliding groove. During the upward movement of the vertical sliding component, the drive mechanism drives the reversing clamping component to move inward horizontally within the corresponding reversing clamping component receiving cavity. While the reversing clamping component moves inward horizontally, the drive mechanism drives the sealing mechanism within the driving component receiving cavity to move synchronously upward, causing the sealing mechanism to move synchronously upward along the injection pipe. When the sealing mechanism moves upward to its highest point and stops, the vertical sliding component continues to move upward, driving the reversing clamping component to rotate within the corresponding reversing clamping component receiving cavity, with the upper end of the reversing clamping component rotating inward.

[0007] The vertical sliding assembly includes a drive ring coaxially disposed below the base and slidably connected to the injection tube. The drive ring has multiple drive plates uniformly arranged vertically along its circumference, which are adapted to the vertical sliding groove. The drive plates are slidably connected to the vertical sliding groove. The upper end of the drive plate is hinged to the reversing slider through a first rotating shaft and a first rotating hole, and the inner diameter of the first rotating hole is larger than the outer diameter of the first rotating shaft. The contact surface between the reversing slider and the lower end of the reversing clamping assembly is a matching inclined surface and is slidably connected.

[0008] The reversing clamping assembly includes a clamping arm located within the reversing clamping assembly receiving cavity, which is connected to a vertical sliding groove. Cylindrical reversing rotation shafts are provided on both sides of the lower part of the clamping arm. A limit block is coaxially sleeved and fixed at the end of the reversing rotation shaft near the clamping arm. A reversing rotation shaft movement groove is radially arranged within the reversing clamping assembly receiving cavity along the base. The side of the reversing rotation shaft movement groove near the clamping arm is a first horizontal movement groove with a groove width adapted to the limit block. The side of the reversing rotation shaft movement groove away from the clamping arm is a second horizontal movement groove with a groove width adapted to the outer diameter of the reversing rotation shaft. The bottom of the first horizontal movement groove near the injection tube is a circular groove bottom capable of accommodating the rotation of the limit block. The bottom of the second horizontal movement groove near the injection tube is a circular groove bottom with a diameter adapted to the reversing rotation shaft. The circular groove bottoms of the first and second horizontal movement grooves are coaxial.

[0009] The sealing mechanism drive assembly includes a drive rod and a drive block. An inner disc, coaxially sleeved and fixed to the outside of the injection tube, is inserted into the base. The sealing mechanism drive assembly accommodating cavity includes a drive block moving cavity, which is axially opened on the inner disc and corresponds to the position of the reversing clamping assembly accommodating cavity. The drive block is axially slidably connected within the drive block moving cavity. A drive rod accommodating cavity is radially arranged within the clamping arm. The outer end of the drive rod is located within the drive rod accommodating cavity and is rotatably connected to the clamping arm via a second rotating shaft, which is coaxial with the reversing rotating shaft. The drive block has a hollow structure, and inclined grooves are symmetrically arranged on both sides of the drive block. The inner end of the drive rod is located inside the drive block and is horizontally connected to a first drive shaft. The two ends of the first drive shaft are located in the inclined grooves on both sides of the drive block. When the clamping arm moves horizontally inward, the drive rod pushes the drive block to move synchronously upward along the axial direction of the injection tube under the action of the inclined grooves. When the drive block moves upward to its highest point, the reversing rotating shaft on the clamping arm moves to the bottom of the circular groove.

[0010] The sealing mechanism drive assembly receiving cavity also includes a drive rod through hole, which is set on the inner plate and connects the reversing clamping assembly receiving cavity and the drive block moving cavity; the upper groove surface of the drive block moving cavity is an inclined surface.

[0011] The sealing mechanism adopts a frustum-shaped rubber sealing plug, which is coaxially slidably sleeved on the injection tube above the drive block. The bottom surface of the rubber sealing plug is fixed to the top surface of the drive block by a retaining ring. A sealing ring is fixedly installed on the injection tube above the rubber sealing plug. When the rubber sealing plug rises to the highest movement position, the upper end of the rubber sealing plug abuts against the lower end of the sealing ring.

[0012] The upper end of the clamping arm is provided with an oblique moving part, and the lower inclined surface of the oblique moving part is slidably connected to the upper inclined surface of the clamping arm; a first elastic reset device is also provided between the lower end of the oblique moving part and the upper end of the clamping arm, and the first elastic reset device drives the oblique moving part to move upward continuously; multiple sets of anti-slip grooves are evenly provided on the inner side of the upper end of the clamping arm and the inner side of the oblique moving part.

[0013] The upper end face of the inclined moving part is also provided with a telescopic anti-detachment structure, which includes an anti-detachment plate provided on the upper end face of the inclined moving part. The anti-detachment plate is slidably connected to the inclined moving part. A second elastic reset device is also provided between the anti-detachment plate and the inclined moving part. The second elastic reset device drives the anti-detachment plate to move inward continuously.

[0014] The pressure supply mechanism includes a pressure supply medium tank and a pressure supply module; the pressure supply module includes a pressurizing pump connected to the pressure supply medium tank, and the liquid outlet of the pressurizing pump is connected in sequence through pipes to the inlet of a check valve, a pressure supply plate, and multiple pressure injection pipes in the pressure supply side accommodating frame; the back pressure mechanism includes a back pressure medium tank and a back pressure module; the back pressure module includes an on / off valve connected to the back pressure medium tank, and the liquid inlet of the on / off valve is connected in sequence through pipes to the outlet of a back pressure plate and multiple pressure injection pipes in the back pressure side accommodating frame.

[0015] The pressure test chamber is also equipped with a protective cover; the protective cover is hinged to the pressure test chamber and has an observation hole.

[0016] This invention utilizes a clamping mechanism composed of a vertical sliding component, a reversing clamping component, and a sealing mechanism drive component. The drive mechanism drives the vertical sliding component to move synchronously upwards along a vertical sliding groove. During this upward movement, the vertical sliding component drives the reversing clamping component to move horizontally inwards within its corresponding reversing clamping component receiving cavity. Simultaneously, the reversing clamping component moves horizontally inwards, driving the sealing mechanism drive component within its receiving cavity to move synchronously upwards, causing the sealing mechanism to move synchronously upwards along the injection pipe. When the sealing mechanism reaches its highest point and stops moving, the vertical sliding component continues to move upwards, driving the reversing clamping component to rotate within its corresponding reversing clamping component receiving cavity, with the upper end of the reversing clamping component rotating inwards. Ultimately, by utilizing the characteristic that the clamping arm first moves inward in the horizontal direction and then rotates to make the upper end of the clamping arm rotate inward, it can effectively clamp the connector nuts with standard diameters (M36 to M30 nominal diameter) as well as connector nuts with diameters smaller than the standard diameter and M29 to M16 nominal diameter, while achieving a good seal. This allows for safe and effective testing of the high pressure resistance and airtightness of various specifications of mining high-pressure rubber hoses.

[0017] Furthermore, the present invention also includes an oblique moving part, a telescopic anti-detachment structure, and an anti-slip groove to further improve its practicality and versatility. Attached Figure Description

[0018] Figure 1 This is an isometric schematic diagram of the present invention; Figure 2 This is a schematic diagram of the pilot-scale pressure chamber structure of the present invention; Figure 3 This is an isometric schematic diagram of the clamping and sealing device in this invention; Figure 4 This is a side view of the base in this invention; Figure 5 In this invention Figure 4 Sectional view along direction A; Figure 6 This is a schematic diagram of the clamping arm structure in this invention; Figure 7 This is a schematic diagram of the clamping arm driving relationship structure in this invention; Figure 8 This is a perspective structural diagram of the cavity housing the reversing clamping component in this invention; Figure 9 This is a schematic diagram showing the connection relationship between the clamping component receiving cavity and the clamping arm in this invention; Figure 10 This is a schematic diagram of the longitudinal cross-section of the clamping arm in this invention; Figure 11 This is a schematic diagram showing the position of the first reset spring in this invention; Figure 12 This is a schematic diagram of the oblique sliding part and the anti-detachment plate structure in this invention; Figure 13 This is a schematic diagram of the inner disk structure in this invention; Figure 14 This is a schematic diagram showing the connection relationship between the drive ring, drive plate, and direction-changing slider in this invention; Figure 15 This is a schematic diagram showing the positional relationship and structure of the drive rod and drive block in this invention; Figure 16 This is a schematic diagram of the sealing rubber plug structure in this invention; Figure 17 This is a schematic diagram of the maximum planar clamping state structure in this invention; Figure 18 In this invention Figure 17 Enlarged schematic diagram of part A; Figure 19 This is a schematic diagram of the minimum planar clamping state structure in this invention; Figure 20 In this invention Figure 19 Enlarged schematic diagram of part B; Figure 21 This is a schematic diagram of the structure in the medium rotation clamping state of the present invention; Figure 22 In this invention Figure 21 Enlarged schematic diagram of part C; Figure 23 This is a schematic diagram of the minimum rotational clamping state structure in this invention; Figure 24 In this invention Figure 23 Enlarged schematic diagram of part D.

[0019] In the diagram: 1. Pressure testing chamber; 2. Receiving frame; 3. Base; 4. Injection pipe; 5. Vertical sliding groove; 6. Reversing clamping assembly receiving cavity; 7. Sealing mechanism drive assembly receiving cavity; 8. Drive ring; 9. Drive plate; 10. First rotating shaft; 11. First rotating hole; 12. Reversing slider; 13. Clamping arm; 14. Reversing rotating shaft; 15. Square limiting block; 16. Reversing rotating shaft movement groove; 17. First horizontal movement groove; 18. Second horizontal movement groove; 19. Circular groove bottom; 20. First sliding part; 21. First sliding groove; 22. Drive rod; 23. Drive block; 24. Inner plate; 25. Drive block moving cavity; 26. 27. Second guide groove; 28. Drive rod receiving cavity; 29. ​​Second rotating shaft; 30. Inclined groove; 31. First drive shaft; 32. Drive rod through hole; 33. Rubber sealing plug; 34. Abutment ring; 35. Sealing ring; 36. Ring-shaped sealing groove; 37. Anti-slip groove; 38. Inclined moving part; 39. Second sliding part; 40. Second sliding groove; 41. First return spring; 42. Anti-detachment plate; 43. Pressurized medium tank; 44. Pressurization pump; 45. Check valve; 46. Pressure plate; 47. Back pressure medium tank; 48. Back pressure plate; 49. Protective cover; 50. Observation hole; 51. First guide part; 52. First guide groove. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments: like Figures 1 to 24 As shown, the mining high-pressure rubber hose testing equipment of the present invention includes a test chamber 1, which is a square box with an open top. A housing frame 2 is symmetrically arranged at both ends of the test chamber 1. Multiple through holes are opened on the upper surface of the housing frame 2, and a clamping and sealing device is installed in each through hole. The clamping and sealing device includes a cylindrical base 3, and an injection pipe 4 is axially inserted and fixed inside the base 3. The inlet end of the injection pipe 4 in the multiple clamping and sealing devices in the pressure supply side housing frame 2 is connected to the pressure supply mechanism; the outlet end of the injection pipe 4 in the multiple clamping and sealing devices in the back pressure side housing frame 2 is connected to the back pressure mechanism. A sealing mechanism is slidably sleeved on the injection tube 4 on the upper side of the base 3; multiple sets of clamping mechanisms are also evenly arranged along the circumference of the base 3, each set of clamping mechanisms including a driving mechanism, a vertical sliding component, a reversing clamping component and a sealing mechanism driving component; multiple sets of vertical sliding grooves 5 adapted to the vertical sliding component are arranged axially on the cylindrical surface of the base 3, multiple sets of reversing clamping component receiving cavities 6 adapted to the reversing clamping component are arranged axially on the upper end surface of the base 3, and multiple sets of sealing mechanism driving component receiving cavities 7 adapted to the sealing mechanism driving component are arranged axially on the inside of the base 3. When it is necessary to clamp and seal the connector nuts at both ends of a high-pressure rubber hose of standard diameter (M36 to M30 nominal diameter), the drive mechanism drives the vertical sliding assembly to move synchronously upward along the corresponding vertical sliding groove 5. During the upward movement of the vertical sliding assembly, the reversing clamping assembly is first driven to move inward horizontally within the corresponding reversing clamping assembly receiving cavity 6. While the reversing clamping assembly moves inward horizontally, the sealing mechanism drives the sealing mechanism in the sealing assembly receiving cavity 7 to move synchronously upward, causing the sealing mechanism to move synchronously upward along the injection tube 4. After the sealing mechanism plugs the inner cavity of the connector nut and achieves a seal, the inner side of the upper end of the reversing clamping assembly contacts the side surface of the connector nut and clamps it. When it is necessary to clamp and seal the connector nuts at both ends of a high-pressure rubber hose with a diameter smaller than the standard diameter (M29 to M16 nominal diameter), the drive mechanism drives the vertical sliding assembly to move synchronously upward along the corresponding vertical sliding groove 5. During the upward movement of the vertical sliding assembly, it first drives the reversing clamping assembly to move inward horizontally within the corresponding reversing clamping assembly receiving cavity 6. While the reversing clamping assembly moves inward horizontally, it drives the sealing mechanism in the sealing assembly receiving cavity 7 to move synchronously upward, causing the sealing mechanism to move synchronously upward along the injection pipe 4. When the sealing mechanism moves upward to the highest point and stops moving, the vertical sliding assembly continues to move upward, driving the reversing clamping assembly to rotate within the corresponding reversing clamping assembly receiving cavity 6, and the upper end of the reversing clamping assembly rotates inward. The inner surface of the upper end of the reversing clamping assembly drives the connector nut to move downward. After the sealing mechanism plugs the inner cavity of the connector nut and achieves a seal, the inner side of the upper end of the reversing clamping assembly contacts the upper surface of the connector nut and clamps it. When it is necessary to release the clamping seal of the connector nuts at both ends of the high-pressure rubber hose, the drive mechanism drives the vertical sliding assembly to move synchronously downward along the corresponding vertical sliding groove 5; the reversing clamping assembly and the sealing mechanism return to the initial position, releasing the clamping seal of the connector nuts.

[0021] In the process of using this invention, the connector nuts at both ends of the mining high-pressure rubber hose to be tested are first vertically fitted onto the corresponding sealing mechanisms in the two accommodating frames 2 on the left and right sides. Then, the driving mechanism is used to synchronously drive the vertical sliding components in multiple clamping mechanisms to move upward synchronously. The driving mechanism can be a cylinder.

[0022] When clamping and sealing the connector nuts at both ends of a standard diameter high-pressure rubber hose, the upward movement of the vertical sliding component simultaneously drives the reversing clamping component to move horizontally inward, and simultaneously drives the sealing mechanism to move upward along the injection tube 4 through the reversing clamping component and the sealing mechanism drive component; until the inner side of the upper end of the reversing clamping component clamps the side surface of the connector nut, and the sealing mechanism fills the inner cavity of the connector nut to achieve a seal; When clamping and sealing the connector nuts at both ends of a high-pressure rubber hose with a diameter smaller than the standard diameter (M29 to M16 nominal diameter), the upward movement of the vertical sliding component, the horizontal inward movement of the reversing clamping component, and the synchronous upward movement of the sealing mechanism along the injection pipe 4 driven by the sealing mechanism drive component are all consistent with the clamping and sealing process of the connector nuts at both ends of a high-pressure rubber hose with a standard diameter. When the sealing mechanism moves synchronously upward along the injection pipe 4 to the highest point, because the connector nut is smaller than the standard diameter, the inner side of the upper end of the reversing clamping component is a certain distance away from the connector nut and cannot clamp it. The sealing mechanism also cannot seal the inner cavity of the connector nut. Subsequently, the vertical sliding component is driven by the drive mechanism to continue moving upward. At this time, the vertical sliding component will drive the reversing clamping component to rotate, so that the upper end of the reversing clamping component rotates inward toward the connector nut. The inner surface of the upper end of the reversing clamping component presses and drives the connector nut downward, so that the sealing mechanism seals the inner cavity of the connector nut.

[0023] Subsequently, the pressure supply mechanism injects test pressure medium into the high-pressure rubber hose to be tested through the injection pipe 4 on one side, to test the high-pressure resistance and airtightness of the high-pressure rubber hose. In this invention, the reversing clamping assembly uses both horizontal linear motion and rotation to effectively clamp the connector nuts of different diameters in hydraulic hoses of different specifications through the upper end of the reversing clamping assembly. At the same time, it cooperates with the sealing mechanism to tighten the inner cavity of the connector nut to achieve a seal, effectively improving the versatility of this invention.

[0024] In this invention, six or three sets of clamping mechanisms can be evenly arranged along the circumference of the base 3 to clamp the six or three sides corresponding to the connector nut. In this embodiment, three sets of clamping mechanisms are evenly arranged along the circumference of the base 3 to clamp the three sides corresponding to the connector nut.

[0025] In this invention, the vertical sliding assembly includes a drive ring 8 coaxially disposed below the base 3, the drive ring 8 being slidably connected to the injection tube 4, and three vertically arranged drive plates 9 evenly disposed along the circumference of the drive ring 8. The position and shape of the drive plates 9 are adapted to the position and shape of the vertical sliding groove 5. First guide grooves 52 are provided on both sides of the vertical sliding groove 5, and first guide portions 51 are provided on both sides of the drive plates 9. The drive plates 9 are slidably connected to the vertical sliding groove 5 through the first guide portions 51 and the first guide grooves 52 and cannot be separated. A first rotating shaft 10 is provided at the upper end of the drive plate 9, and a wedge-shaped deflecting slider is provided. The drive plate 9 has first rotating holes 11 on both sides. The upper end of the drive plate 9 is hinged to the reversing slider 12 through the first rotating shaft 10 and the first rotating hole 11. The inner diameter of the first rotating hole 11 is larger than the outer diameter of the first rotating shaft 10 to prevent interference between the drive plate 9 and the reversing slider 12 during relative rotation. The contact surface between the reversing slider 12 and the lower end of the reversing clamping assembly is a matching inclined surface. The reversing slider 12 is slidably connected to the lower inclined surface of the reversing clamping assembly. The reversing slider 12 moves upward using the inclined surface, driving the reversing clamping assembly to move inward in the horizontal direction within the reversing clamping assembly receiving cavity 6. In this embodiment, the reversing clamping assembly includes a clamping arm 13 located within the reversing clamping assembly receiving cavity 6, and the reversing clamping assembly receiving cavity 6 is connected to the vertical sliding groove 5; cylindrical reversing rotation shafts 14 are provided on both sides of the lower part of the clamping arm 13, and a square limiting block 15 is coaxially sleeved and fixed at one end of the reversing rotation shaft 14 near the clamping arm 13; a reversing rotation shaft movement groove 16 is provided radially along the base 3 within the reversing clamping assembly receiving cavity 6, and the side of the reversing rotation shaft movement groove 16 near the clamping arm 13 is a first horizontal movement groove 17 with a groove width adapted to the square limiting block 15, and the second... A horizontal motion groove 17 restricts the square limiting block 15 to only move in a straight line and cannot rotate; the end of the reversing rotation shaft motion groove 16 away from the clamping arm 13 is a second horizontal motion groove 18 whose groove width is adapted to the outer diameter of the reversing rotation shaft 14; the bottom of the first horizontal motion groove 17 near the injection tube 4 is a circular groove bottom 19 with a diameter larger than the diagonal of the square limiting block 15; the bottom of the second horizontal motion groove 18 near the injection tube 4 is a circular groove bottom 19 with a diameter adapted to the reversing rotation shaft 14; the circular groove bottoms 19 of the first horizontal motion groove 17 and the second horizontal motion groove 18 are coaxial.

[0026] When the reversing rotation shaft 14 has not moved to the bottom of the circular groove 19, it is limited by the first horizontal movement groove 17 and the square limiting block 15, and can only move horizontally in the radial direction. When the reversing rotation shaft 14 moves to the bottom of the circular groove 19, since the square limiting block 15 is located in the bottom of the circular groove 19 with a diameter larger than the diagonal of the square limiting block 15, the square limiting block 15 can rotate in the bottom of the circular groove 19. At this time, the reversing rotation shaft 14 can rotate about the end of the reversing rotation shaft 14 away from the clamping arm 13 as the axis, thereby realizing the switching of the reversing rotation shaft 14 from linear motion to rotation. In this embodiment, the directional slider 12 is a wedge-shaped slider with an isosceles right triangle cross-section to achieve the inclined plane driving effect. The directional slider 12 is provided with a first sliding part 20, and the lower inclined surface of the clamping arm 13 is provided with a first sliding groove 21. The directional slider 12 is slidably connected to the lower inclined surface of the clamping arm 13 through the first sliding part 20 and the first sliding groove 21 and cannot be separated.

[0027] During its upward movement, the drive plate 9 drives the directional slider 12 to move vertically upward. Since the directional slider 12 is slidably connected to the lower inclined surface of the clamping arm 13, it drives the directional rotating shaft 14 to move horizontally towards the circular groove bottom 19. During this process, it is limited by the first horizontal movement groove 17 and the square limiting block 15, causing the clamping arm 13 and the directional rotating shaft 14 to move synchronously and in the same direction radially inward. When the directional rotating shaft 14 reaches the circular groove bottom 19, the square limiting block 15 can... The bottom 19 rotates within the shaft, and the end of the reversing rotation shaft 14 away from the clamping arm 13 is located at the bottom 19 of the circular groove and cannot continue to move horizontally. With the drive plate 9 hinged to the reversing slider 12 and the inner diameter of the first rotating hole 11 being larger than the outer diameter of the first rotating shaft 10, the reversing slider 12 continues to move upward and rotates relative to the drive plate 9. This drives the clamping arm 13 to rotate around the end of the reversing rotation shaft 14 away from the clamping arm 13 as an axis within the reversing clamping assembly receiving cavity 6, causing the upper end of the clamping arm 13 to rotate inward. The above structural arrangement enables the clamping arm 13 to first move inward in the horizontal direction and then rotate to cause the upper end of the clamping arm 13 to rotate inward during the upward movement of the drive plate 9.

[0028] In this embodiment, the sealing mechanism drive assembly includes a drive rod 22 and a drive block 23. The base 3 is an annular base, and an inner disk 24 coaxially sleeved on the outside of the injection tube 4 is inserted inside the base 3. The inner and outer sides of the inner disk 24 are fixedly connected to the base 3 and the injection tube 4, respectively. The sealing mechanism drive assembly receiving cavity 7 includes a drive block moving cavity 25, which is axially opened on the inner disk 24 and corresponds to the position of the reversing clamping assembly receiving cavity 6. A second guide portion 26 is provided on the surface of the drive block 23, and a second guide groove 27 is correspondingly provided in the drive block moving cavity 25. The drive block 23 passes through the second guide portion 26. The second guide groove 27 is axially slidably connected to the drive block moving cavity 25 and cannot be separated. The clamping arm 13 is radially provided with a drive rod receiving cavity 28. The outer end of the drive rod 22 is located in the drive rod receiving cavity 28 and is rotatably connected to the clamping arm 13 through the second rotating shaft 29. The second rotating shaft 29 is coaxial with the reversing rotating shaft 14. The drive block 23 is a hollow structure, and inclined grooves 30 are symmetrically provided on both sides of the drive block 23. The inner end of the drive rod 22 is located inside the drive block 23 and is horizontally connected to the first drive shaft 31. The two ends of the first drive shaft 31 are respectively located in the inclined grooves 30 on both sides of the drive block 23. When the clamping arm 13 moves horizontally inward, it will push the drive rod 22 to move horizontally inward through the outer end of the drive rod 22. Since the inner end of the drive rod 22 is inserted in the inclined groove 30, the drive block 23 is pushed to move synchronously upward along the injection tube 4 under the action of the inclined groove 30, and the sealing mechanism is pushed to move synchronously upward along the injection tube 4. When the drive block 23 pushes the sealing mechanism upward to its highest position, the clamping arm 13 moves horizontally inward to its limit position, and the reversing rotation shaft 14 on the clamping arm 13 moves to the bottom of the circular groove 19. The drive rod 22 remains horizontal and no longer moves horizontally. At this time, the reversing slider 12 continues to move upward, driving the clamping arm 13 to rotate about the end of the reversing rotation shaft 14 away from the clamping arm 13, causing the upper end of the clamping arm 13 to rotate inward. During this process, in order not to interfere with the relative rotation of the clamping arm 13 and the drive rod 22, the upper groove surface of the drive block moving cavity 25 is an inclined surface to prevent the upper end of the clamping arm 13 from being unable to rotate inward due to the obstruction of the drive rod 22 in the horizontal position.

[0029] The sealing mechanism drive assembly receiving cavity 7 also includes a drive rod through hole 32, which is provided on the inner disk 24 and connects the reversing clamping assembly receiving cavity 6 and the drive block moving cavity 25, so as to enable the drive rod 22 to pass through the drive block moving cavity 25 into the reversing clamping assembly receiving cavity 6.

[0030] In this embodiment, the sealing mechanism adopts a frustum-shaped rubber sealing plug 33. The rubber sealing plug 33 is coaxially slidably sleeved on the injection tube 4 above the drive block 23. The bottom surface of the rubber sealing plug 33 is fixed to the top surface of the drive block 23 by a retaining ring 34. The retaining ring 34 is coaxially sleeved on the injection tube 4 and slidably connected to the injection tube 4. A sealing ring 35 is fixedly provided on the injection tube 4 above the rubber sealing plug 33. When the rubber sealing plug 33 is driven by the drive block 23 to rise to the highest movement position, the upper end of the rubber sealing plug 33 abuts against the lower end of the sealing ring 35. The sealing ring 35 seals the gap between the rubber sealing plug 33 and the injection tube 4, preventing the test pressure medium from leaking from the gap between the rubber sealing plug 33 and the injection tube 4 during testing.

[0031] To ensure a proper seal between the sealing ring 35 and the rubber sealing plug 33, the lower end face of the sealing ring 35 is provided with an annular sealing protrusion, and the upper end face of the rubber sealing plug 33 is provided with an annular sealing groove 36 that matches the annular sealing protrusion. When the upper end of the rubber sealing plug 33 is pressed against the lower end of the sealing ring 35, the annular sealing protrusion is inserted into the annular sealing groove 36.

[0032] In order to increase the friction between the inner side of the upper end of the clamping arm 13 and the contact area of ​​the connector nut during rotation, and to ensure the stability of clamping, in this invention, multiple sets of anti-slip grooves 37 are uniformly provided on the inner side of the upper end of the clamping arm 13.

[0033] To facilitate the placement of large-sized connector nuts, in this invention, the upper end of the clamping arm 13 is provided with an oblique moving part 38, the lower inclined surface of the oblique moving part 38 is provided with a second sliding part 39, and the upper inclined surface of the clamping arm 13 is provided with a second sliding groove 40. The lower inclined surface of the oblique moving part 38 and the upper inclined surface of the clamping arm 13 are slidably connected and cannot be separated through the second sliding part 39 and the second sliding groove 40. Furthermore, a first elastic reset device is provided between the lower end of the oblique moving part 38 and the upper end of the clamping arm 13, driving the oblique moving part 38 to always move upward. In this embodiment, the first elastic reset device can be a first reset spring 41. The inner surface of the oblique moving part 38 is also uniformly provided with multiple sets of anti-slip grooves 37.

[0034] When the larger diameter connector nut enters the space enclosed by the three sets of clamping arms 13, the inclined moving part 38 at the upper end of the three sets of clamping arms 13 can be driven downward, causing the inclined moving part 38 to slide downward, thereby allowing the connector nut to smoothly enter the space enclosed by the three sets of clamping arms 13 and be fitted onto the rubber sealing plug 33. When the downward pressure on the inclined moving part 38 is released, the inclined moving part 38 automatically rises to the initial position under the action of the return spring.

[0035] In this invention, the inner surface of the upper end of the clamping arm 13 is used to vertically clamp the side of the connector nut, or the inner surface of the upper end of the clamping arm 13 after rotation is used to clamp the upper edge of the connector nut. In extreme cases, the connector nut may detach due to excessive pressure during testing. To prevent damage to equipment or personal injury caused by the high-pressure hose whipping phenomenon resulting from the connector nut detaching, a telescopic anti-detachment structure is also provided on the upper end face of the inclined moving part 38. The telescopic anti-detachment structure includes an anti-detachment plate 42 provided on the upper end face of the inclined moving part 38, a third sliding part provided on the lower end face of the anti-detachment plate 42, and a third sliding groove provided on the upper end face of the inclined moving part 38. The anti-detachment plate 42 is slidably connected to the inclined moving part 38 through the third sliding part and the third sliding groove and cannot be separated. A second elastic reset device is also provided between the anti-detachment plate 42 and the inclined moving part 38. The second elastic reset device drives the anti-detachment plate 42 to move inward continuously. In this embodiment, the second elastic reset device can be a second reset spring. The upper end of the anti-detachment plate 42 extends inward, so that the gap between the three sets of anti-detachment plates 42 is smaller than the outer diameter of the connector nut. In the extreme case where the connector nut is detached due to excessive pressure, it prevents the connector nut from moving outward and reduces safety hazards.

[0036] In this invention, a pressure supply mechanism is used to provide the pressure required for testing rubber hoses. The pressure supply mechanism includes a pressure supply medium tank 43 and a pressure supply module located on the lower side of the test chamber 1. The pressure supply module includes a pressure pump 44 connected to the pressure supply medium tank 43. The outlet of the pressure pump 44 is connected to the inlet of a check valve 45 via a pipe. The outlet of the check valve 45 is connected to a pressure supply plate 46 via a pipe. The pressure supply plate 46 has a plate-shaped structure. Multiple outlets on the top of the pressure supply plate 46 are respectively connected to the inlet of the injection pipe 4 in multiple clamping and sealing devices in the pressure supply side accommodating frame 2. The pressure supply mechanism provides uniform pressure for testing multiple rubber hoses, making the testing process safer and the test results more accurate.

[0037] In this invention, the backpressure mechanism is used to recover the medium used in the pressure test of the rubber hose. The backpressure mechanism includes a backpressure medium tank 47 and a backpressure module disposed on the lower side of the test chamber 1; the backpressure module includes an on / off valve and a backpressure plate 48 connected in sequence to the backpressure medium tank 47 via pipelines; the backpressure plate 48 has a plate-shaped structure, and multiple liquid inlet ends disposed on the top of the backpressure plate 48 are respectively connected to the liquid outlet ends of the injection pipes 4 in multiple clamping sealing devices in the backpressure side accommodating frame 2.

[0038] In order to protect the operators, the pressure test chamber 1 is also provided with a protective cover 49; the protective cover 49 is hinged to the pressure test chamber 1, and the protective cover 49 is provided with an observation hole 50.

[0039] Example 1: like Figure 17 and Figure 18As shown, when a pressure test is required on a high-pressure rubber hose with the largest standard diameter (the connector nut is an M36 nominal diameter), the connector nuts at both ends of the high-pressure rubber hose are first vertically fitted onto the corresponding sealing mechanisms in the two accommodating frames 2. At this time, the lower end face of the M36 connector nut first contacts the upper end face of the inclined moving part 38, and drives the inclined moving part 38 to move downward along the upper inclined surface of the clamping arm 13, avoiding interference from the inclined sliding part on the placement of the large-diameter connector nut. This allows the large-diameter connector nut to smoothly enter the space enclosed by the three sets of clamping arms 13 and be fitted onto the rubber sealing plug 33. At this time, the M36 connector nut on the rubber sealing plug 33 is located below the inclined sliding part and has a certain distance in the vertical direction. Since the M36 connector nut on the rubber sealing plug 33 no longer exerts pressure on the inclined moving part 38, the inclined moving part 38 automatically rises to the initial position under the action of the first return spring 41.

[0040] After the M36 connector nut is placed, the operator starts the cylinder and drives the drive plate 9 upward through the drive ring 8. During the upward movement, the drive plate 9 drives the reversing slider 12 to move vertically upward. Since the reversing slider 12 is slidably connected to the lower inclined surface of the clamping arm 13, it drives the reversing rotating shaft 14 to move horizontally in the direction of the circular groove bottom 19. During this process, due to the limiting effect of the first horizontal movement groove 17 and the square limiting block 15, the clamping arm 13 and the reversing rotating shaft 14 move only synchronously and in the same direction in the radial horizontal inward.

[0041] As the clamping arm 13 moves horizontally inward, it pushes the drive rod 22 to move horizontally inward through the outer end of the drive rod 22. Since the inner end of the drive rod 22 is inserted into the inclined groove 30, the drive block 23 is pushed to move synchronously upward along the injection tube 4 under the action of the inclined groove 30, and the rubber sealing plug 33 is pushed to move synchronously upward along the injection tube 4 through the abutment ring 34.

[0042] The upward-moving rubber sealing plug 33 simultaneously pushes the M36 connector nut upward, coordinating with the inward horizontal movement of the clamping arm 13, until the side surface of the M36 connector nut is clamped by the inner side of the upper end of the clamping arm 13, preventing the M36 connector nut from rising further. At this time, the rubber sealing plug 33 seals and presses against the inner wall of the M36 connector nut, and the rubber sealing plug 33 abuts against the sealing ring 35, thus forming a seal between the rubber sealing plug 33 and the M36 connector nut. Since the cylinder used in this embodiment has a self-locking function, it forms a stable clamping of the high-pressure rubber hose with M36 connector nuts at both ends by the clamping arm 13, and at the same time forms an effective seal between the rubber sealing plug 33 and the high-pressure rubber hose with M36 connector nuts at both ends.

[0043] After clamping, turn on the pressure pump 44 to purge the air from the high-pressure rubber hose. Once the air is purged, the operator closes the on / off valve and begins the pressure test on the high-pressure rubber hose. At this time, the test medium begins to flow into the inner cavity of the high-pressure rubber hose. When the required pressure is reached, turn off the pressure pump 44, and the operator observes the high-pressure rubber hose for leaks through the high-strength glass on the protective cover 49. When the required test time is reached, the operator opens the on / off valve, and the test medium flows into the back pressure medium tank 47 under pressure.

[0044] After the pressure test is completed, the operator releases the cylinder, removes the high-pressure rubber hose from chamber 1 of the pressure test chamber, and records the sealing performance of the high-pressure rubber hose.

[0045] Example 2: like Figure 19 and Figure 20 As shown, when it is necessary to test the pressure of the M30 specification high-pressure rubber hose, since the inner diameter, wall thickness and outer diameter of the M30 specification connector nut are all smaller than those of the M36 specification connector nut, the placement of the M30 specification connector nut, the vertical upward movement of the drive plate 9, the horizontal inward movement of the reversing shaft 14, the vertical upward movement of the drive block 23 along the axial direction of the injection tube 4 and the vertical upward movement of the rubber sealing plug 33 along the axial direction of the injection tube 4 are all the same as those of the M36 specification connector nut, and will not be described again here. The only difference is that the vertical upward movement of the drive plate 9, the horizontal inward movement of the reversing shaft 14, the vertical upward movement of the drive block 23 along the axial direction of the injection tube 4, and the vertical upward movement of the rubber sealing plug 33 along the axial direction of the injection tube 4 are all slightly longer than the fixing distance of the M36 specification connector nut. The side surface of the M30 connector nut is also clamped by the inner side of the upper end of the clamping arm 13. Since the cylinder used in this embodiment has a self-locking function, it forms a stable clamping of the high-pressure rubber hose with M30 connector nuts at both ends by the clamping arm 13, and at the same time forms an effective seal of the high-pressure rubber hose with M30 connector nuts at both ends by the rubber sealing plug 33.

[0046] The pressure testing process for M30 connector nuts is the same as that for M36 connector nuts, and will not be described again here.

[0047] Example 3: like Figure 21 and Figure 22As shown, when it is necessary to test the pressure of the M24 specification high-pressure rubber hose, since the inner diameter, wall thickness and outer diameter of the M24 specification connector nut are all smaller than those of the M30 specification connector nut, the initial placement of the M24 specification connector nut, the vertical upward movement of the drive plate 9, the horizontal inward movement of the reversing shaft 14, the vertical upward movement of the drive block 23 along the axial direction of the injection tube 4 and the vertical upward movement of the rubber sealing plug 33 along the axial direction of the injection tube 4 are all the same as those of the M30 specification connector nut. Because the inner diameter of connector nuts smaller than M30 is small and the deformation of the rubber sealing plug 33 is limited, connector nuts smaller than M30 cannot be clamped during the initial stage (i.e., after the clamping arm 13 moves horizontally inward to its limit position and the rubber sealing plug 33 moves upward to its limit position). Furthermore, after the rubber sealing plug 33 moves upward to its limit position, it cannot cooperate with the clamping arm 13 to form an effective seal. Therefore, for connector nuts smaller than M30, this invention further achieves clamping of the connector nut by rotating the clamping arm 13.

[0048] When the clamping arm 13 moves horizontally inward to its limit position, and the drive block 23 and rubber sealing plug 33 move to their highest positions, the reversing shaft 14 moves to the bottom of the circular groove 19. Since the drive plate 9 drives the reversing slider 12 to continue moving upward, and the drive block 23 can no longer move upward, the clamping arm 13 rotates around the reversing shaft 14 within the circular groove bottom 19, driven by the drive plate 9 and the reversing slider 12. The upper end of the clamping arm 13 rotates inward. Simultaneously, the upper end of the clamping arm 13 rotates inward through… The anti-slip groove 37 on the inclined moving part 38 contacts the M24 connector nut. The inclined moving part 38 presses and drives the M24 connector nut to move downward and form a clamp, so that the M24 connector nut is pressed against the sealing rubber plug and a seal is formed on the M24 connector nut. Since the cylinder used in this embodiment has a self-locking function, the clamping arm 13 forms a stable clamp on the high-pressure rubber hose with M24 connector nuts at both ends, and at the same time forms an effective seal on the high-pressure rubber hose with M24 connector nuts at both ends by the rubber sealing plug 33.

[0049] The pressure testing process for M24 connector nuts is the same as that for M36 connector nuts, and will not be described again here.

[0050] Example 4: like Figure 23 and Figure 24As shown, when a pressure test is required on an M16 specification high-pressure rubber hose (i.e., the minimum sealing clamping specification in this embodiment), since the inner diameter, wall thickness, and outer diameter of the M16 specification connector nut are all smaller than those of the M24 specification connector nut, the placement of the M16 specification connector nut, the vertical upward movement of the drive plate 9, the horizontal inward movement of the reversing rotation shaft 14, the vertical upward movement of the drive block 23 along the axial direction of the injection tube 4, the vertical upward movement of the rubber sealing plug 33 along the axial direction of the injection tube 4, the rotation process of the clamping arm 13, and the sealing of the M16 specification connector nut by the sealing rubber plug are all consistent with those of the M24 specification connector nut, and will not be described again here. The only difference is that the distance and angle of movement of each component during the above-mentioned movement process are slightly greater than those of the fixed M24 specification connector nut. Since the M16 connector nut is the smallest sealing clamping size in this embodiment, when the clamping arm 13 effectively seals and clamps the M16 connector nut, the contact position between the M16 connector nut and the inclined moving part 38 is located at the upper position of the inclined moving part 38. Because the M16 connector nut and other smaller connector nuts are at risk of falling off during the pressure test, this invention uses a telescopic anti-loosening structure to prevent the connector nut from moving outward, thereby reducing safety hazards.

[0051] The pressure testing process for M16 connector nuts is the same as that for M36 connector nuts, and will not be described again here.

Claims

1. A testing device for high-pressure rubber hoses used in mining, characterized in that: The device includes a pressure testing chamber, with symmetrically arranged receiving frames at both ends. Multiple clamping and sealing devices are arranged on the upper surface of the receiving frames. Each clamping and sealing device includes a cylindrical base, with an injection pipe fixedly inserted axially inside the base. The inlet ends of the multiple injection pipes in the pressure supply side receiving frame are connected to a pressure supply mechanism, and the outlet ends of the multiple injection pipes in the back pressure side receiving frame are connected to a back pressure mechanism. A sealing mechanism is slidably fitted onto the injection pipe on the upper side of the base. Multiple sets of clamping mechanisms are also evenly arranged along the circumference of the base. Each clamping mechanism includes a drive mechanism, a vertical sliding component, a reversing clamping component, and a sealing mechanism drive component. Multiple sets of vertical sliding grooves are correspondingly arranged along the axial direction on the cylindrical surface of the base. Multiple sets of reversing clamping component receiving cavities are correspondingly arranged along the axial direction on the upper end surface of the base. Multiple sets of sealing mechanism drive component receiving cavities are correspondingly arranged along the axial direction inside the base. The drive mechanism drives the vertical sliding component to move synchronously upward along the vertical sliding groove. During the upward movement of the vertical sliding component, the drive mechanism drives the reversing clamping component to move inward horizontally within the corresponding reversing clamping component receiving cavity. While the reversing clamping component moves inward horizontally, the drive mechanism drives the sealing mechanism within the driving component receiving cavity to move synchronously upward, causing the sealing mechanism to move synchronously upward along the injection pipe. When the sealing mechanism moves upward to its highest point and stops, the vertical sliding component continues to move upward, driving the reversing clamping component to rotate within the corresponding reversing clamping component receiving cavity, with the upper end of the reversing clamping component rotating inward.

2. The testing equipment for high-pressure rubber hoses used in mining according to claim 1, characterized in that: The vertical sliding assembly includes a drive ring coaxially disposed below the base and slidably connected to the injection tube. The drive ring has multiple drive plates uniformly arranged vertically along its circumference, which are adapted to the vertical sliding groove. The drive plates are slidably connected to the vertical sliding groove. The upper end of the drive plate is hinged to the reversing slider through a first rotating shaft and a first rotating hole, and the inner diameter of the first rotating hole is larger than the outer diameter of the first rotating shaft. The contact surface between the reversing slider and the lower end of the reversing clamping assembly is a matching inclined surface and is slidably connected.

3. The testing equipment for high-pressure rubber hoses used in mining according to claim 2, characterized in that: The reversing clamping assembly includes a clamping arm located within the reversing clamping assembly receiving cavity, which is connected to a vertical sliding groove. Cylindrical reversing rotation shafts are provided on both sides of the lower part of the clamping arm. A limit block is coaxially sleeved and fixed at the end of the reversing rotation shaft near the clamping arm. A reversing rotation shaft movement groove is radially arranged within the reversing clamping assembly receiving cavity along the base. The side of the reversing rotation shaft movement groove near the clamping arm is a first horizontal movement groove with a groove width adapted to the limit block. The side of the reversing rotation shaft movement groove away from the clamping arm is a second horizontal movement groove with a groove width adapted to the outer diameter of the reversing rotation shaft. The bottom of the first horizontal movement groove near the injection tube is a circular groove bottom capable of accommodating the rotation of the limit block. The bottom of the second horizontal movement groove near the injection tube is a circular groove bottom with a diameter adapted to the reversing rotation shaft. The circular groove bottoms of the first and second horizontal movement grooves are coaxial.

4. The mining high-pressure rubber hose testing equipment according to claim 3, characterized in that: The sealing mechanism drive assembly includes a drive rod and a drive block. An inner disc, coaxially sleeved and fixed to the outside of the injection tube, is inserted into the base. The sealing mechanism drive assembly accommodating cavity includes a drive block moving cavity, which is axially opened on the inner disc and corresponds to the position of the reversing clamping assembly accommodating cavity. The drive block is axially slidably connected within the drive block moving cavity. A drive rod accommodating cavity is radially arranged within the clamping arm. The outer end of the drive rod is located within the drive rod accommodating cavity and is rotatably connected to the clamping arm via a second rotating shaft, which is coaxial with the reversing rotating shaft. The drive block has a hollow structure, and inclined grooves are symmetrically arranged on both sides of the drive block. The inner end of the drive rod is located inside the drive block and is horizontally connected to a first drive shaft. The two ends of the first drive shaft are located in the inclined grooves on both sides of the drive block. When the clamping arm moves horizontally inward, the drive rod pushes the drive block to move synchronously upward along the axial direction of the injection tube under the action of the inclined grooves. When the drive block moves upward to its highest point, the reversing rotating shaft on the clamping arm moves to the bottom of the circular groove.

5. The testing equipment for high-pressure rubber hoses used in mining according to claim 4, characterized in that: The sealing mechanism drive assembly receiving cavity also includes a drive rod through hole, which is set on the inner plate and connects the reversing clamping assembly receiving cavity and the drive block moving cavity; the upper groove surface of the drive block moving cavity is an inclined surface.

6. The testing equipment for high-pressure rubber hoses used in mining according to claim 5, characterized in that: The sealing mechanism adopts a frustum-shaped rubber sealing plug, which is coaxially slidably sleeved on the injection tube above the drive block. The bottom surface of the rubber sealing plug is fixed to the top surface of the drive block by a retaining ring. A sealing ring is fixedly installed on the injection tube above the rubber sealing plug. When the rubber sealing plug rises to the highest movement position, the upper end of the rubber sealing plug abuts against the lower end of the sealing ring.

7. The testing equipment for high-pressure rubber hoses used in mining according to claim 3, characterized in that: The upper end of the clamping arm is provided with an oblique moving part, and the lower inclined surface of the oblique moving part is slidably connected to the upper inclined surface of the clamping arm; a first elastic reset device is also provided between the lower end of the oblique moving part and the upper end of the clamping arm, and the first elastic reset device drives the oblique moving part to move upward continuously; multiple sets of anti-slip grooves are evenly provided on the inner side of the upper end of the clamping arm and the inner side of the oblique moving part.

8. The testing equipment for high-pressure rubber hoses used in mining according to claim 7, characterized in that: The upper end face of the inclined moving part is also provided with a telescopic anti-detachment structure, which includes an anti-detachment plate provided on the upper end face of the inclined moving part. The anti-detachment plate is slidably connected to the inclined moving part. A second elastic reset device is also provided between the anti-detachment plate and the inclined moving part. The second elastic reset device drives the anti-detachment plate to move inward continuously.

9. The testing equipment for high-pressure rubber hoses used in mining according to claim 1, characterized in that: The pressure supply mechanism includes a pressure supply medium tank and a pressure supply module; the pressure supply module includes a pressurizing pump connected to the pressure supply medium tank, and the liquid outlet of the pressurizing pump is connected in sequence through pipes to the inlet of a check valve, a pressure supply plate, and multiple pressure injection pipes in the pressure supply side accommodating frame; the back pressure mechanism includes a back pressure medium tank and a back pressure module; the back pressure module includes an on / off valve connected to the back pressure medium tank, and the liquid inlet of the on / off valve is connected in sequence through pipes to the outlet of a back pressure plate and multiple pressure injection pipes in the back pressure side accommodating frame.

10. The testing equipment for high-pressure rubber hoses used in mining according to claim 1, characterized in that: The pressure test chamber is also equipped with a protective cover; the protective cover is hinged to the pressure test chamber and has an observation hole.

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