An explosion-proof hydraulic valve

Abstract

This utility model relates to the field of valves, specifically an explosion-proof hydraulic valve, including an explosion-proof hydraulic valve and a connecting sealing assembly. The upper end of the explosion-proof hydraulic valve is provided with two junction boxes, each with a fixed connector on one side. A movable connector is movably provided on one side of the fixed connector via a buffer assembly. The buffer assembly includes a buffer extension tube, an elastic sealing piston, and a sealing base plate. The movable connector is movably mounted on one side of the fixed connector via the buffer assembly. When the external wiring harness passes through the movable connector, a conventional interlocking sealing sleeve is used for sealing. When there is pulling movement on one side of the external wiring harness, the external wiring harness can be unloaded through the buffer assembly, preventing the external wiring harness from loosening between the interlocking sealing sleeve and the external wiring harness due to ordinary pulling force. In addition, with the cooperation of the elastic corrugated sealing sleeve, the buffer assembly is in a sealed environment, improving the explosion-proof safety performance.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically an explosion-proof hydraulic valve. Background Technology

[0002] Explosion-proof hydraulic valves are hydraulic control components suitable for explosive environments. They are designed and manufactured in accordance with specific explosion-proof standards and can prevent sparks, high temperatures or electric arcs generated during operation from igniting the surrounding explosive media, thereby ensuring the safe operation of the hydraulic system in hazardous environments. Among them, electromagnetic hydraulic directional valves control the flow direction of hydraulic oil through electromagnetic signals during use, so as to start, stop, reverse or speed regulate the actuator.

[0003] In existing explosion-proof electromagnetic hydraulic directional valves, external electrical control harnesses need to be connected to two junction boxes during use. Due to environmental limitations, the connection points of the harnesses need to be sealed. Existing sealing methods often involve the harness passing through the connector and then the sealing gasket inside the connector being compressed and deformed by bolts. This achieves a wrapping and sealing effect on the harness after the gasket is deformed. However, since the harness and the connector are connected in a straight line, although the sealing gasket can provide a certain biting force when it wraps the harness, gaps can easily appear between the harness and the sealing gasket when the harness is pulled in the same direction, thus affecting the explosion-proof performance. Utility Model Content

[0004] The purpose of this invention is to provide an explosion-proof hydraulic valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an explosion-proof hydraulic valve, comprising:

[0006] An explosion-proof hydraulic valve is provided with two junction boxes at the upper end. Each junction box has a fixed connector on one side. A movable connector is provided on one side of the fixed connector through a buffer assembly. The buffer assembly includes a buffer tube, an elastic sealing piston, and a sealing base plate.

[0007] A connecting sealing assembly is provided, comprising an interlocking sealing sleeve and an elastic corrugated sealing sleeve. An external wiring harness is inserted into the movable connector through a buffer tube and the fixed connector. The interlocking sealing sleeve is placed inside the movable connector, and the elastic corrugated sealing sleeve is fitted onto the movable connector and the fixed connector.

[0008] Preferably, the fixed connector is connected to the junction box, and a warp groove is provided on one side of the fixed connector. The buffer tube is horizontally positioned at the center of one side of the movable connector, and the end of the buffer tube away from the movable connector is inserted into the warp groove of the fixed connector.

[0009] Preferably, the buffer tube is inserted into the apodization groove at one end with a constraint ring, and the elastic sealing piston is sleeved on the constraint ring of the buffer tube, with the outer periphery of the elastic sealing piston in elastic contact with the inner wall of the side with the largest diameter in the apodization groove.

[0010] Preferably, the fixed connector has an internal threaded groove at the end away from the junction box, and a sealing base plate is threadedly inserted into the internal threaded groove. The sealing base plate is sleeved with a buffer extension tube, and a buffer spring is sleeved between the constraint ring and the sealing base plate.

[0011] Preferably, the buffer tube has a through-slot on one side between the movable connector and the fixed connector, and the side of the external wiring harness that is inserted into the buffer tube has a bent section that extends out of the through-slot. The inner diameter of the buffer tube is larger than the diameter of the external wiring harness.

[0012] Preferably, the interlocking seal sleeve is disposed inside the movable connector and is fitted with an external wiring harness. The end of the movable connector away from the fixed connector is provided with a compression sealing sleeve by threaded insertion. The end of the compression sealing sleeve inserted into the movable connector is provided with a conical extrusion ring, which is grounded to the outer periphery of one end of the interlocking seal sleeve.

[0013] Preferably, both the fixed connector and the movable connector have annular recessed grooves on their outer periphery. The elastic corrugated sealing sleeve fits over and covers the annular recessed grooves of the fixed connector and the movable connector. Two sealing annular hoops are fitted on the outer periphery of the elastic corrugated sealing sleeve, and the two sealing annular hoops are respectively set to correspond to the two annular recessed grooves.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This device uses a buffer assembly to movably mount the movable connector on one side of the fixed connector. When the external wiring harness passes through the movable connector, it is sealed by a conventional interlocking sealing sleeve. When there is pulling movement on one side of the external wiring harness, the external wiring harness can be relieved by the buffer assembly, preventing the external wiring harness from loosening between the interlocking sealing sleeve and the external wiring harness due to ordinary pulling force. In addition, with the cooperation of the elastic corrugated sealing sleeve, the buffer assembly is in a sealed environment, improving the explosion-proof safety performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a partial side sectional view of the present invention.

[0018] Figure 3 This utility model Figure 2 Schematic diagram of part A;

[0019] Figure 4 This utility model Figure 3 Schematic diagram of part B;

[0020] Figure 5 This is an exploded view showing the connection between the fixed connector and the movable connector of this utility model.

[0021] In the diagram: 1. Explosion-proof hydraulic valve; 2. Fixed connector; 3. Movable connector; 4. Buffer extension tube; 5. Elastic sealing piston; 6. Sealing base plate; 7. Aperture groove; 8. Buffer spring; 9. External wiring harness; 10. Engaging sealing sleeve; 11. Compression sealing nut; 12. Strip through groove; 13. Elastic corrugated sealing sleeve; 14. Annular recessed groove; 15. Sealing ring clamp; 16. Junction box. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Please see the appendix Figure 1-5 This application provides the following technical solutions.

[0024] An explosion-proof hydraulic valve includes an explosion-proof hydraulic valve 1. Two junction boxes 16 are provided at the upper end of the explosion-proof hydraulic valve 1. A fixed connector 2 is provided on one side of each junction box 16. A movable connector 3 is movably provided on one side of each fixed connector 2 via a buffer assembly. The buffer assembly includes a buffer tube 4, an elastic sealing piston 5, and a sealing base plate 6. The fixed connector 2 is connected to the junction box 16. A warp groove 7 is formed on one side of the fixed connector 2. The buffer tube 4 is horizontally positioned at the center of one side of the movable connector 3. The end of the buffer tube 4 away from the movable connector 3 is inserted into the warp groove 7 of the fixed connector 2. The junction box 16 is a sealed shell structure. The junction box 16 is fixedly connected to the explosion-proof hydraulic valve 1 by bolts. The explosion-proof hydraulic valve 1 is connected to a hydraulic control system by bolts. The buffer tube 4 can move axially back and forth within the fixed connector 2.

[0025] The buffer tube 4 is inserted into the apodization groove 7 and has a constraint ring at one end. The elastic sealing piston 5 is sleeved on the constraint ring of the buffer tube 4. The outer periphery of the elastic sealing piston 5 is in elastic contact with the inner wall of the apodization groove 7 on the side with the largest diameter. The elastic sealing piston 5 is made of elastic sealing material. The elastic sealing piston 5 can be side-wall fitted on the side with the largest diameter in the apodization groove 7. In this way, when the elastic sealing piston 5 moves back and forth with the buffer tube 4, the elastic sealing piston 5 will only be elastically squeezed.

[0026] The fixed connector 2 has an internal threaded groove at the end away from the junction box 16. A sealing base plate 6 is threadedly inserted into the internal threaded groove. The sealing base plate 6 is sleeved with a buffer extension tube 4. A buffer spring 8 is sleeved between the buffer extension tube 4 and the constraint ring and the sealing base plate 6. The sealing base plate 6 is connected to the fixed connector 2 by threads. The structure is simple and convenient. The buffer spring 8 is set between the sealing base plate 6 and the elastic sealing piston 5. After the buffer extension tube 4 slides away from the sealing base plate 6, it can be pushed back to its original position by the rebound force of the buffer spring 8.

[0027] The buffer tube 4 has a through-slot 12 on one side between the movable connector 3 and the fixed connector 2. The external wiring harness 9 is inserted into the buffer tube 4 and has a bent section on one side. The bent section extends out of the through-slot 12 and the inner diameter of the buffer tube 4 is larger than the diameter of the external wiring harness 9. When the external wiring harness 9 is pulled due to external reasons, the external wiring harness 9 bent at the through-slot 12 position can compensate to both sides to avoid affecting the power connection between the external wiring harness 9 and the junction box 16 when the external wiring harness 9 is pulled.

[0028] The connecting sealing assembly is configured to seal and tighten the connection between the external wiring harness 9 and the movable connector 3, as well as provide a movable seal between the fixed connector 2 and the movable connector 3. The connecting sealing assembly includes a locking sealing sleeve 10 and an elastic corrugated sealing sleeve 13. The external wiring harness 9 is inserted into the movable connector 3 through a buffer tube 4 and the fixed connector 2. The locking sealing sleeve 10 is placed inside the movable connector 3. The elastic corrugated sealing sleeve 13 is fitted onto the movable connector 3 and the fixed connector 2. The locking sealing sleeve 10 is located inside the movable connector 3 and fitted onto the external wiring harness 9. A compression sealing sleeve 11 is threaded into the end of the movable connector 3 away from the fixed connector 2. The end of the compression sealing sleeve 11 inserted into the movable connector 3 has a conical compression ring. The conical compression ring and the locking sealing sleeve 10... One end of the outer periphery is connected to the ground. When the compression sealing sleeve 11 is inserted into the movable connector 3 through the thread, the engagement sealing sleeve 10 is squeezed and deformed by the compression sealing sleeve 11. At this time, the deformed engagement sealing sleeve 10 bites the external wiring harness 9 that passes through. When the external wiring harness 9 is pulled, the pulling force of the external wiring harness 9 will be applied to the movable connector 3 through the engagement sealing sleeve 10. Then, the buffer extension tube 4 pulls the elastic sealing piston 5 to move horizontally in the anomalous groove 7. As the anomalous groove 7 gradually narrows on both sides, when the buffer extension tube 4 and the elastic sealing piston 5 move, the elastic sealing piston 5 moves, deforms and squeezes the seal along the external wiring harness 9. At the same time, as the buffer extension tube 4 moves, the external wiring harness 9 is in the bending area of ​​the strip through groove 12 for expansion and contraction compensation, realizing the pull buffer of the external wiring harness 9.

[0029] Both the fixed connector 2 and the movable connector 3 have annular recessed grooves 14 on their outer periphery. The elastic corrugated sealing sleeve 13 fits over and covers the annular recessed grooves 14 of the fixed connector 2 and the movable connector 3. Two sealing annular hoops 15 are fitted around the outer periphery of the elastic corrugated sealing sleeve 13, and the two sealing annular hoops 15 are respectively set to correspond to the two annular recessed grooves 14. The elastic expansion and contraction of the elastic corrugated sealing sleeve 13 can adapt to the buffering activity of the buffer tube 4, and at the same time can seal the joint between the fixed connector 2 and the movable connector 3.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof hydraulic valve, characterized in that, include: An explosion-proof hydraulic valve (1) is provided with two junction boxes (16) at its upper end. Each of the two junction boxes (16) is provided with a fixed connector (2) on one side. A movable connector (3) is provided on one side of the fixed connector (2) through a buffer assembly. The buffer assembly includes a buffer tube (4), an elastic sealing piston (5), and a sealing base plate (6). The connection sealing assembly includes a snap-fit ​​sealing sleeve (10) and an elastic corrugated sealing sleeve (13). The movable connector (3) is connected to the buffer tube (4) and the fixed connector (2) with an external wiring harness (9). The snap-fit ​​sealing sleeve (10) is placed inside the movable connector (3). The elastic corrugated sealing sleeve (13) is fitted onto the movable connector (3) and the fixed connector (2).

2. The explosion-proof hydraulic valve according to claim 1, characterized in that: The fixed connector (2) is connected to the junction box (16). A tread groove (7) is provided on one side of the fixed connector (2). The buffer tube (4) is horizontally located at the center of one side of the movable connector (3). The end of the buffer tube (4) away from the movable connector (3) is inserted into the tread groove (7) of the fixed connector (2).

3. The explosion-proof hydraulic valve according to claim 2, characterized in that: The buffer tube (4) is inserted into the apodization groove (7) and has a constraint ring at one end. The elastic sealing piston (5) is sleeved on the constraint ring of the buffer tube (4). The outer periphery of the elastic sealing piston (5) is in elastic contact with the inner wall of the apodization groove (7) on the side with the largest diameter.

4. The explosion-proof hydraulic valve according to claim 3, characterized in that: The fixed connector (2) has an internal thread groove at one end away from the junction box (16). A sealing base plate (6) is threaded into the internal thread groove. The sealing base plate (6) is sleeved with a buffer extension tube (4), and a buffer spring (8) is sleeved between the constraint ring and the sealing base plate (6).

5. The explosion-proof hydraulic valve according to claim 4, characterized in that: The buffer tube (4) has a through slot (12) on one side between the movable connector (3) and the fixed connector (2). The external wiring harness (9) is inserted into the buffer tube (4) and has a bent section on one side. The bent section extends out of the through slot (12) and the inner diameter of the buffer tube (4) is larger than the diameter of the external wiring harness (9).

6. The explosion-proof hydraulic valve according to claim 5, characterized in that: The interlocking sealing sleeve (10) is located inside the movable connector (3) and is fitted with an external wiring harness (9). The end of the movable connector (3) away from the fixed connector (2) is provided with a compression sealing sleeve (11) by threaded insertion. The end of the compression sealing sleeve (11) inserted into the movable connector (3) is provided with a conical extrusion ring. The conical extrusion ring is connected to the outer periphery of one end of the interlocking sealing sleeve (10).

7. The explosion-proof hydraulic valve according to claim 6, characterized in that: Both the fixed connector (2) and the movable connector (3) have annular grooves (14) on their outer periphery. The elastic corrugated sealing sleeve (13) fits over and covers the annular grooves (14) of the fixed connector (2) and the movable connector (3). Two sealing rings (15) are fitted on the outer periphery of the elastic corrugated sealing sleeve (13), and the two sealing rings (15) are respectively set to correspond to the two annular grooves (14).

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