A 50mpa impact-resistant mine hydraulic support safety valve

Abstract

The utility model discloses a 50MPa anti -impact type mining hydraulic support safety valve relates to safety valve technical field, including lower valve body, upper valve body, the both sides of lower valve body are connected and are communicated to have and go out liquid inlet and liquid outlet, the sealing assembly of being able to improve safety valve leak -proofness and reduce the leakage of sealing assembly on lower valve body assembly, through sealing assembly, make the cover plate can be tightly attached on the sleeve under the action of first spring, and the circular ring is cooperated with the round groove of mounting frame top, fills the gap through extruding rubber ring, effectively enhanced the leak -proofness of safety valve, reduced the leakage condition's occurrence, improved the reliability and stability of hydraulic system, reduced the environmental risk and resource waste that hydraulic oil leaked brought.

Description

Technical Field

[0001] This utility model relates to the field of safety valve technology, and in particular to a 50MPa impact-resistant safety valve for mining hydraulic supports. Background Technology

[0002] The safety valve of a mining hydraulic support is a key protective device used in mining hydraulic supports. Its main function is to limit the pressure in the hydraulic system and prevent excessive system pressure from causing equipment damage or safety accidents.

[0003] In the use of hydraulic supports in mines, safety valves are one of the key components to ensure the safe and stable operation of the hydraulic system. Traditional safety valves have some problems in practical applications. For example, their sealing performance is generally poor, which can easily lead to liquid leakage in the valve body under normal conditions. This not only wastes hydraulic oil but may also affect the normal operation of the entire hydraulic support system and even leave safety hazards. In addition, the sealing performance between the valve core and the inlet of existing safety valves is poor and cannot meet the sealing requirements under high-pressure conditions. Especially under high-pressure environments such as 50MPa, sealing failure due to high-pressure impact is likely to occur. Utility Model Content

[0004] The purpose of this utility model is to solve the problem of poor sealing between the valve core and the inlet, which fails to meet the sealing requirements under high pressure conditions, and to propose a 50MPa impact-resistant safety valve for mining hydraulic supports.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A 50MPa impact-resistant safety valve for mining hydraulic supports includes a lower valve body and an upper valve body. The lower valve body has an inlet and an outlet respectively connected to both sides. A sealing component that can improve the sealing performance of the safety valve and reduce leakage is installed on the lower valve body. The sealing assembly includes a sleeve fixedly installed inside the lower valve body, a rubber ring mounted on the sleeve via a mounting bracket, a cover plate placed at the top of the sleeve, a lifting component mounted on the lower valve body that allows the cover plate to fit against the sleeve, a pressure component mounted on the upper valve body that adjusts the fit between the cover plate and the sleeve, and a limiting component mounted on the upper valve body that fixes the adjusted pressure component.

[0007] As a further description of the above technical solution:

[0008] The lifting component includes several positioning rods fixedly installed inside the lower valve body, and the surface of the positioning rods is provided with a first spring. The bottom end of the cover plate is fixedly connected with a ring.

[0009] As a further description of the above technical solution:

[0010] The cover plate is slidably mounted on several positioning rods, and the first spring is fixedly mounted between the cover plate and the lower valve body. The size of the ring is adapted to the size of the circular groove on the top of the mounting bracket.

[0011] As a further description of the above technical solution:

[0012] The rubber ring is located inside the circular groove, the mounting bracket has several through holes, and the sleeve is located inside the liquid inlet.

[0013] As a further description of the above technical solution:

[0014] The pressure component includes a plug rod fixedly installed on the top of the cover plate, a base plate fixedly installed on the surface of the plug rod, a threaded rod threadedly connected to the top of the upper valve body, a pressure plate rotatably connected to the bottom of the threaded rod, and a second spring fixedly installed between the pressure plate and the base plate.

[0015] As a further description of the above technical solution:

[0016] Both the base plate and the pressure plate are located inside the upper valve body, and the top end of the insert rod passes through the pressure plate and is slidably installed inside the threaded rod.

[0017] As a further description of the above technical solution:

[0018] The limiting component includes a fixed frame that is fixedly installed on the top of the upper valve body, a locking block that is set on the fixed frame by a third spring, and a protective cover that is installed on the fixed frame by a locking groove.

[0019] As a further description of the above technical solution:

[0020] The card block is slidably installed on the inner ring of the fixed frame, the size of the card slot is adapted to the size of the extended end of the card block, and the protective cover has a hexagonal groove inside.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0022] The sealing assembly allows the cover plate to fit tightly against the sleeve under the action of the first spring, and the ring engages with the groove on the top of the mounting bracket. By squeezing the rubber ring to fill the gap, the sealing performance of the safety valve is effectively enhanced, reducing leakage and improving the reliability and stability of the hydraulic system. This also reduces the environmental risks and resource waste caused by hydraulic oil leakage. The design of the pressure component allows the deformation of the second spring between the pressure plate and the base plate to be adjusted by rotating the threaded rod, thereby changing the pressure strength of the cover plate and achieving precise adjustment of the safety valve opening pressure. This adjustment method is simple to operate and can adapt the safety valve to the corresponding pressure requirements under different working conditions, ensuring stable operation of the hydraulic system within the set pressure range. The limit component effectively prevents the threaded rod from rotating due to accidental contact or excessive pressure, thus ensuring the stability and reliability of the pressure component after adjustment. The protective cover protects the threaded rod, avoiding interference from external factors and extending its service life. Attached Figure Description

[0023] Figure 1 An overall schematic diagram according to an embodiment of the present utility model is shown;

[0024] Figure 2 The present invention provides an embodiment of the present invention. Figure 1 Another perspective view;

[0025] Figure 3 A cross-sectional view of the lower valve body provided according to an embodiment of the present invention is shown;

[0026] Figure 4 A schematic diagram of a lifting component according to an embodiment of the present invention is shown;

[0027] Figure 5 A schematic diagram of a pressure component according to an embodiment of the present invention is shown;

[0028] Figure 6 A diagram showing the positional relationship between the threaded rod and the insertion rod according to an embodiment of the present invention is provided.

[0029] Figure 7 A schematic diagram of a limiting component according to an embodiment of the present invention is shown;

[0030] Figure 8 The present invention provides an embodiment of the present invention. Figure 7 Another perspective view;

[0031] Figure 9 A cross-sectional view of a mounting bracket provided according to an embodiment of the present invention is shown.

[0032] Legend:

[0033] 10. Lower valve body; 11. Upper valve body; 12. Liquid inlet; 13. Liquid outlet; 20. Sealing assembly; 21. Sleeve; 22. Rubber ring; 23. Mounting bracket; 24. Cover plate; 25. Lifting component; 251. Positioning rod; 252. First spring; 253. Ring; 26. Pressure component; 261. Insert rod; 262. Base plate; 263. Threaded rod; 264. Pressure plate; 265. Second spring; 30. Limiting assembly; 31. Fixing bracket; 32. Locking block; 33. Third spring; 34. Protective cover; 35. Locking groove. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] like Figures 1-9 As shown, the present invention provides a 50MPa impact-resistant mine hydraulic support safety valve, comprising a lower valve body 10 and an upper valve body 11, which are fixed together by screws, and a rubber gasket is provided at the connection between the lower valve body 10 and the upper valve body 11. The two sides of the lower valve body 10 are respectively connected to an inlet 12 and an outlet 13. A sealing component 20 that can improve the sealing performance of the safety valve and reduce leakage is mounted on the lower valve body 10.

[0036] The sealing assembly 20 includes a sleeve 21 fixedly installed inside the lower valve body 10, a rubber ring 22 set on the sleeve 21 by a mounting bracket 23, a cover plate 24 placed on the top of the sleeve 21, a lifting component 25 that allows the cover plate 24 to fit against the sleeve 21 on the lower valve body 10, a pressure component 26 that can adjust the degree of fit between the cover plate 24 and the sleeve 21 on the upper valve body 11, and a limiting component 30 that can fix the adjusted pressure component 26 on the upper valve body 11.

[0037] like Figures 3-4 As shown, the lifting component 25 includes several positioning rods 251 fixedly installed inside the lower valve body 10, and a first spring 252 is provided on the surface of the positioning rods 251. A ring 253 is fixedly connected to the bottom end of the cover plate 24.

[0038] In more detail, the cover plate 24 is slidably mounted on several positioning rods 251, and the first spring 252 is fixedly mounted between the cover plate 24 and the lower valve body 10. The first spring 252 enables the cover plate 24 to fit against the sleeve 21, and the reaction force of the first spring 252 enables the cover plate 24, which has risen due to liquid pressure, to return to its original position. The size of the ring 253 is adapted to the size of the circular groove at the top of the mounting bracket 23.

[0039] In more detail, the rubber ring 22 is located inside the circular groove. When the ring 253 descends into the circular groove, it will squeeze the rubber ring 22 inside the circular groove. The deformed rubber ring 22 fills the gap between the ring 253 and the circular groove. The mounting bracket 23 has several through holes, which prevent liquid from accumulating inside the circular groove. The sleeve 21 is located inside the liquid inlet 12.

[0040] Under normal circumstances, the cover plate 24 is pressed tightly against the sleeve 21 by the first spring 252 and the pressure component 26. At this time, the liquid inlet 12 is closed, and the liquid cannot enter the safety valve through the liquid inlet 12. When the liquid pressure in the hydraulic support system exceeds the set pressure of the safety valve, the pressure of the liquid on the bottom of the cover plate 24 is greater than the sum of the traction force between the first spring 252 and the pressure component 26, which will push the cover plate 24 to rise. As the cover plate 24 rises, the ring 253 will also rise from the groove, so that the cover plate 24 and the sleeve 21 will no longer be in contact and a gap will be formed. At this time, the liquid will enter the safety valve through the gap from the sleeve 21 and be discharged through the liquid outlet 13, thereby releasing the excessive pressure in the system and protecting other components of the hydraulic support from excessive pressure impact.

[0041] When the hydraulic pressure is restored, the cover plate 24 will be reset by the reaction force of the first spring 252 and the pressure component 26, thus fitting together with the sleeve 21. At the same time, the ring 253 will also descend into the groove and squeeze the rubber ring 22 inside the groove. The deformed rubber ring 22 fills the gap between the ring 253 and the groove, thereby further increasing the sealing between the cover plate 24 and the sleeve 21.

[0042] like Figures 4-6As shown, the pressure component 26 includes a rod 261 fixedly installed on the top of the cover plate 24. A base plate 262 is fixedly installed on the surface of the rod 261. A threaded rod 263 is threadedly connected to the top of the upper valve body 11. A pressure plate 264 is rotatably connected to the bottom of the threaded rod 263. By rotating the threaded rod 263, the pressure plate 264 can be driven to rise and fall. A second spring 265 is fixedly installed between the pressure plate 264 and the base plate 262. When the pressure plate 264 rises and falls, the second spring 265 located between the pressure plate 264 and the base plate 262 will be subjected to different pressures, which will change the degree of deformation of the second spring 265 and transmit it to the rod 261 through the base plate 262, and then to the cover plate 24 through the rod 261, thereby changing the pressure strength of the cover plate 24 and thus changing the contact force between the cover plate 24 and the sleeve 21.

[0043] In more detail, both the base plate 262 and the pressure plate 264 are located inside the upper valve body 11. The top end of the insert rod 261 passes through the pressure plate 264 and is slidably installed inside the threaded rod 263. This allows the cover plate 24 to slide inside the threaded rod 263 when it is raised or lowered, thus not affecting the raising or lowering of the cover plate 24.

[0044] like Figures 7-9 As shown, the limiting component 30 includes a fixed bracket 31 fixedly installed on the top of the upper valve body 11. The locking block 32 is set on the fixed bracket 31 by a third spring 33. The locking block 32 can be reset by the reaction force of the third spring 33. The protective cover 34 is installed on the fixed bracket 31 by a slot 35. The protective cover 34 plays a protective role for the threaded rod 263 and prevents accidental contact with the threaded rod 263.

[0045] In more detail, the locking block 32 is slidably installed on the inner ring of the fixing frame 31, the size of the locking groove 35 is adapted to the size of the extension end of the locking block 32, and the protective cover 34 has a hexagonal groove inside. The hexagonal groove can limit the hexagonal plate at the top of the threaded rod 263, so that the threaded rod 263 cannot rotate and will not rotate due to excessive pressure.

[0046] When the fitting force of the cover plate 24 needs to be adjusted, the protective cover 34 is pulled upward, and the extension end of the locking block 32 is squeezed through the locking groove 35, causing the locking block 32 to retract under pressure and disengage from the locking groove 35, thus removing the protective cover 34. Then, the fitting force of the cover plate 24 is adjusted by rotating the threaded rod 263. After the adjustment is completed, the hexagonal groove inside the protective cover 34 is matched with the hexagonal plate at the top of the threaded rod 263. Then, the protective cover 34 is placed on the threaded rod 263 and inserted into the fixing bracket 31. The extension end of the locking block 32 is pressed and retracted again, and is reset to contact the locking groove 35 by the reaction force of the third spring 33, thereby fixing the protective cover 34.

[0047] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A 50MPa impact-resistant mine hydraulic support safety valve, comprising a lower valve body (10) and an upper valve body (11), liquid inlet (12) and liquid outlet (13) are respectively communicated and opened on both sides of the lower valve body (10), characterized in that, Also includes: The lower valve body (10) is equipped with a sealing component (20) that can improve the sealing performance of the safety valve and reduce leakage; the sealing component (20) includes a sleeve (21) fixedly installed inside the lower valve body (10), a rubber ring (22) is set on the sleeve (21) by a mounting bracket (23), a cover plate (24) is placed on the top of the sleeve (21), the lower valve body (10) is equipped with a lifting component (25) that can make the cover plate (24) fit with the sleeve (21), the upper valve body (11) is equipped with a pressure component (26) that can adjust the degree of fit between the cover plate (24) and the sleeve (21), and the upper valve body (11) is also equipped with a limiting component (30) that can fix the adjusted pressure component (26).

2. The 50MPa impact-resistant mine hydraulic support safety valve according to claim 1, characterized in that, The lifting component (25) includes several positioning rods (251) fixedly installed inside the lower valve body (10), and the surface of the positioning rods (251) is provided with a first spring (252), and the bottom end of the cover plate (24) is fixedly connected with a ring (253).

3. The 50MPa impact-resistant mine hydraulic support safety valve according to claim 2, characterized in that, The cover plate (24) is slidably mounted on a plurality of positioning rods (251), and the first spring (252) is fixedly mounted between the cover plate (24) and the lower valve body (10). The size of the ring (253) is adapted to the size of the circular groove at the top of the mounting bracket (23).

4. The 50MPa impact-resistant mine hydraulic support safety valve according to claim 3, characterized in that, The rubber ring (22) is located in the circular groove, the mounting bracket (23) has several through holes, and the sleeve (21) is located inside the liquid inlet (12).

5. The 50MPa impact-resistant mine hydraulic support safety valve according to claim 2, characterized in that, The pressure component (26) includes a plug rod (261) fixedly installed on the top of the cover plate (24), a base plate (262) fixedly installed on the surface of the plug rod (261), a threaded rod (263) threadedly connected to the top of the upper valve body (11), a pressure plate (264) rotatably connected to the bottom of the threaded rod (263), and a second spring (265) fixedly installed between the pressure plate (264) and the base plate (262).

6. The 50MPa impact-resistant mine hydraulic support safety valve according to claim 5, characterized in that, The base plate (262) and the pressure plate (264) are both located inside the upper valve body (11), and the top end of the insert rod (261) passes through the pressure plate (264) and is slidably installed inside the threaded rod (263).

7. The 50MPa impact-resistant mine hydraulic support safety valve according to claim 1, characterized in that, The limiting component (30) includes a fixed frame (31) fixedly installed on the top of the upper valve body (11), a locking block (32) set on the fixed frame (31) by a third spring (33), and a protective cover (34) installed on the fixed frame (31) by a slot (35).

8. The 50MPa impact-resistant mine hydraulic support safety valve according to claim 7, characterized in that, The card block (32) is slidably installed on the inner ring of the fixing frame (31), the size of the card slot (35) is adapted to the size of the extended end of the card block (32), and the interior of the protective cover (34) is provided with a hexagonal groove.

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