Mining self-lubricating electro-hydraulic control reversing valve
By designing a self-lubricating electro-hydraulic reversing valve for mines and using emulsion for self-lubrication and rust prevention, the problem of thread rust of electro-hydraulic reversing valves in underground coal mines and reduced working performance in low-temperature environments has been solved, and the valve's performance has been achieved. Long life and stable operation.
Patent Information
- Application Number
- CN202411727337.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-01-21
AI Technical Summary
In the harsh environment of coal mines, the threaded connection between the valve core and the valve body of the electro-hydraulic control reversing valve is prone to rust, which affects the service life. In addition, the viscosity of hydraulic oil increases in low temperature environments, resulting in solenoid pilot valves and reversing valves. The performance of the operation is degraded.
Design a type of ore with self -lubricating electric liquid -controlled exchanges valve. Through the design of the internal oil circuit design of the special valve body, the thread of the main valve core and the pilot filter element is self -lubricated. Maintain the lubrication and rust -proof effect within the appropriate temperature range through a nozzle and heating device to ensure that the emulsification solution is lubricated and rust.
Effectively prevent the rust of the thread of the valve core and the pilot filter element, improve the service life of the electrical hydraulic switching valve, and ensure the stable work of the valve in a low -temperature environment to prevent the emulsion from becoming thick or solidified.
Smart Images
Figure CN119333436A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of mining electro-hydraulic valves, in particular to a mining self-lubricating electro-hydraulic controlled reversing valve. Background Art
[0002] Hydraulic support is an indispensable core equipment for comprehensive mining in coal mines. It is mainly responsible for supporting the coal seam and roof, thereby ensuring the stability and safety of the coal mining surface. Various actions of these supports, such as the lifting and lowering of columns, the operation of push-and-pull frames, the movement of telescopic beams and guard plates, etc., all rely on the precise control of electro-hydraulic control reversing valves. However, the working environment underground in coal mines is extremely harsh, filled with high concentrations of sulfur, phosphorus and high humidity conditions, which poses a severe challenge to electro-hydraulic control reversing valves. Although the current mainstream electro-hydraulic control reversing valves have adopted stainless steel valve bodies and valve cores, and are connected by threads, in this extreme environment, the threaded connection between the valve core and the valve body still becomes the main rust point, seriously affecting the service life of the electro-hydraulic control reversing valve. Especially in overhaul projects, the threaded pairs of the valve core and valve body, the pilot filter element and the valve body are rusted. During disassembly and assembly, the threaded pairs are particularly easy to tear, causing damage to the valve body and valve core threads. In addition, the temperature underground in coal mines is low, the viscosity of the hydraulic oil will increase significantly, and the fluidity will deteriorate, which will cause the working performance of the electromagnetic pilot valve and the entire reversing valve to decline, and may even fail to work normally. At the same time, the pilot filter element is prone to accumulate impurities during operation, affecting its filtering performance, and thus affecting the stability of the entire hydraulic system.
[0003] Therefore, it is necessary to provide a new mining self-lubricating electro-hydraulic controlled reversing valve to solve the above-mentioned technical problems. Summary of the invention
[0004] In order to solve the above technical problems, the present invention provides a self-lubricating electro-hydraulic controlled reversing valve for mining.
[0005] The mining self-lubricating electro-hydraulic controlled reversing valve provided by the present invention comprises: an electromagnetic pilot valve, a valve body is fixedly connected to the bottom of the electromagnetic pilot valve, a pilot filter is threadedly connected to the upper left side of the front side of the valve body, and a plurality of main valve cores are threadedly connected to the lower right side of the front side of the valve body, a liquid return hole is provided at the liquid return of the electromagnetic pilot valve, a first oil channel is connected at the liquid return hole, a second oil channel is connected below the first oil channel, a third oil channel is connected to the left side of the second oil channel, and the other end of the third oil channel is connected to the pilot filter connection thread, and the emulsion forms a layer of lubricating oil film at the pilot filter thread pair to lubricate the pilot filter thread pair. To effectively reduce the risk of rust, the second oil channel is connected to the seventh oil channel on the left side, and a nozzle is provided at the outlet of the seventh oil channel, which is arranged inside the valve body. A heating device is fixedly connected to the left side above the first oil channel through the valve body. When the heating device is started, the emulsion is heated to keep the emulsion within a suitable temperature range. The emulsion at a suitable temperature can better exert its anti-rust and lubrication properties, ensuring that the entire electro-hydraulic controlled reversing valve can work stably under different working conditions, especially in the low temperature environment of coal mines, effectively preventing the emulsion from thickening or solidifying due to excessively low temperature, thereby affecting the normal operation of the valve.
[0006] Preferably, a fourth oil channel is connected to the front right side of the second oil channel, and the right end of the fourth oil channel is connected to the main valve core connecting thread. The return liquid diverted from the second oil channel reaches the main valve core connecting thread through the fourth oil channel, forming a lubricating oil film at the thread pair.
[0007] Preferably, the left end of the fourth oil channel is connected to a reflux check valve, a sixth oil channel is arranged above the reflux check valve, and the other end of the sixth oil channel is connected to the system main return oil channel, forming a dynamic lubrication and return liquid cycle, which ensures the lubrication effect while preventing the return liquid from accumulating inside the valve body and affecting the normal operation of other components.
[0008] Preferably, the third oil channel is connected to the fourth oil channel below, the fourth oil channel is connected to the fifth oil channel on the right side, and each main valve core threaded connection is interconnected by the fifth oil channel. When the electromagnetic pilot valve is working, the return liquid can form a uniform lubricating oil film at each main valve core thread pair, further improving the overall lubrication effect of the main valve core.
[0009] Preferably, a nozzle is fixedly connected to the top of the nozzle pipe, a main nozzle is arranged in the middle of the nozzle, and a secondary nozzle is arranged on the side of the nozzle to increase the spraying range.
[0010] Preferably, a spiral pipe is provided inside the nozzle, so that the ejected emulsion can form a rotating flushing flow.
[0011] Preferably, a temperature sensor is provided on the right side of the first oil channel inlet, and the temperature sensor is electrically connected to the heating device. When the temperature is lower than the set value, the temperature sensor sends a signal to the heating device, and the heating device is started.
[0012] Preferably, the main valve core plug and the pilot filter core plug are made of high-strength polyformaldehyde material, and the valve body is made of stainless steel, which is convenient for adapting to the harsh working environment underground in coal mines.
[0013] Compared with the related art, the mining self-lubricating electro-hydraulic controlled reversing valve provided by the present invention has the following beneficial effects: 1. The present invention provides a self-lubricating electro-hydraulic controlled reversing valve for mining. Through the special oil circuit design inside the valve body, the main valve core connecting thread and the pilot filter element connecting thread of the electro-hydraulic controlled reversing valve are self-lubricated, which effectively prevents the corrosion of the main valve core connecting thread and the pilot filter element thread, and at the same time reduces the corrosion of the end faces of the valve core and the pilot filter element, thereby increasing the service life of the electro-hydraulic controlled reversing valve.
[0014] 2. The present invention provides a self-lubricating electro-hydraulic controlled reversing valve for mining, which flushes the surface of the pilot filter element by installing a nozzle cleaning device. During the flushing process, the rotating emulsified liquid flow can effectively remove impurities on the surface of the filter element and restore the filtering performance of the filter element.
[0015] 3. The present invention provides a self-lubricating electro-hydraulic controlled reversing valve for mining, which heats the emulsion by installing a heating device, especially in the low-temperature environment of coal mines, to effectively prevent the emulsion from thickening or solidifying due to too low temperature, thereby affecting the normal operation of the valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 A structural schematic diagram of a preferred embodiment of a mining self-lubricating electro-hydraulic controlled reversing valve provided by the present invention; Figure 2 for Figure 1 The structural diagram of the right view of the inside of the valve body is shown; Figure 3 for Figure 1 A schematic diagram of the structure of the top view of the interior of the valve body shown; Figure 4 for Figure 1 The structural schematic diagram of the front view of the interior of the valve body shown; Figure 5 for Figure 2 Schematic diagram of the structure of the nozzle shown.
[0017] Numbers in the figure: 1. Solenoid pilot valve; 2. Valve body; 3. Pilot filter element; 4. Return hole; 5. First oil channel; 6. Second oil channel; 7. Third oil channel; 8. Fourth oil channel; 9. Fifth oil channel; 10. Sixth oil channel; 11. System main return oil channel; 12. Return check valve; 13. Main valve core; 14. Seventh oil channel; 15. Nozzle; 16. Main nozzle; 17. Auxiliary nozzle; 18. Spiral pipe; 19. Temperature sensor; 20. Heating device; 21. Nozzle. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0019] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.
[0020] See also Figures 1 to 5, a self-lubricating electro-hydraulic controlled reversing valve for mining provided by an embodiment of the present invention, the self-lubricating electro-hydraulic controlled reversing valve for mining comprises: an electromagnetic pilot valve 1, a valve body 2 is fixedly connected to the bottom of the electromagnetic pilot valve 1, a pilot filter element 3 is threadedly connected to the upper left front side of the valve body 2, and a plurality of main valve cores 13 are threadedly connected to the lower right front side of the valve body 2, a return hole 4 is provided at the return liquid position of the electromagnetic pilot valve 1, a first oil passage 5 is connected to the liquid outlet of the return hole 4, a second oil passage 6 is connected to the lower part of the first oil passage 5, a third oil passage 7 is connected to the left side of the second oil passage 6, the other end of the third oil passage 7 is connected to the connection thread of the pilot filter element 3, a seventh oil passage 14 is connected to the left side of the second oil passage 6, a nozzle 15 is provided at the outlet of the seventh oil passage 14, and the nozzle 15 is arranged inside the valve body 2, a heating device 20 is fixedly connected to the upper left side of the first oil passage 5 through the valve body 2, a fourth oil passage 8 is connected to the front right side of the second oil passage 6, and the fourth oil passage 8 The right end is connected to the main valve core 13 connecting thread, the left end of the fourth oil channel 8 is connected to the reflux check valve 12, the sixth oil channel 10 is arranged above the reflux check valve 12, the other end of the sixth oil channel 10 is connected to the system main return oil channel 11, the third oil channel 7 is connected to the fourth oil channel 8 below, the fourth oil channel 8 is connected to the fifth oil channel 9 on the right side, each main valve core 13 thread connection is interconnected by the fifth oil channel 9, the top of the nozzle 15 is fixedly connected to the nozzle head 21, the middle of the nozzle head 21 is provided with a main nozzle 16, the side of the nozzle head 21 is provided with an auxiliary nozzle 17, the inside of the nozzle 15 is provided with a spiral pipe 18, the right side of the first oil channel 5 is provided with a temperature sensor 19, the temperature sensor 19 is electrically connected to the heating device 20, the return liquid of the electromagnetic pilot valve 1 flows out from the return liquid hole 4, passes through the first oil channel 5 and the second oil channel 6, and part of the return liquid flows to the connecting thread of the pilot filter element 3 through the third oil channel 7.In this process, the emulsion forms a layer of lubricating oil film at the thread pair of the pilot filter element 3, lubricates the thread pair of the pilot filter element 3, and effectively reduces the risk of rust. When the electromagnetic pilot valve 1 is reversed, the pilot return liquid flows continuously, and finally flows through the fourth oil channel 8 through the return check valve 12, passes through the sixth oil channel 10, and enters the system main return oil channel 11, forming a complete pilot filter element 3 return and self-lubricating cycle. The fourth oil channel 8 connected to the front of the right side of the second oil channel 6 introduces the return liquid of the electromagnetic pilot valve 1 into the connecting thread of the main valve core 13, and then flows to the thread of the main valve core 13 to lubricate the thread of the main valve core 13. The fifth oil channel 9 is connected to the fourth oil channel 8, so that a lubricating oil film can be formed on the thread of the main valve core 13 above, so that the end faces of the main valve core 13 and the pilot filter element 3 are immersed in the emulsion. Since the emulsion itself has the functions of rust prevention, lubrication, and antibacterial, it can effectively reduce the rust on the valve core and the end faces of the pilot filter element 3. The risk of rust, at the same time, the seventh oil channel 14 connected to the left side of the second oil channel 6 transports part of the return liquid to the nozzle 15. The interior of the nozzle 15 is a spiral shape of a spiral pipe 18, which can make the ejected emulsion form a rotating flushing flow, and then pass through the main nozzle 16 and the auxiliary nozzle 17 to increase the injection range and flush the surface of the pilot filter element 3. During the flushing process, the rotating emulsion flow can effectively remove impurities on the surface of the filter element and restore the filtering performance of the filter element. When the temperature is lower than the set value, the temperature sensor 19 sends a signal to the heating device 20, and the heating device 20 is started to heat the emulsion to keep the emulsion within a suitable temperature range. The emulsion at a suitable temperature can better exert its anti-rust, lubrication and other properties, ensuring that the entire electro-hydraulic control reversing valve can work stably under different working conditions, especially in the low temperature environment of coal mines, effectively preventing the emulsion from thickening or solidifying due to too low temperature, affecting the normal operation of the valve.
[0021] In the embodiments of the present invention, please refer to Figure 1 The main valve core 13 plug and the pilot filter element 3 plug are made of high-strength polyoxymethylene material, and the valve body 2 is made of stainless steel, which is convenient for adapting to the harsh working environment in coal mines.
[0022] The working principle of the mining self-lubricating electro-hydraulic controlled reversing valve provided by the present invention is as follows: the return liquid of the electromagnetic pilot valve 1 flows out from the return liquid hole 4, passes through the first oil channel 5 and the second oil channel 6, and part of the return liquid flows to the connecting thread of the pilot filter element 3 through the third oil channel 7. In this process, the emulsion forms a layer of lubricating oil film at the thread pair of the pilot filter element 3, lubricating the thread pair of the pilot filter element 3, effectively reducing the risk of rust, and when the electromagnetic pilot valve 1 is reversed, the pilot return liquid flows continuously, and finally flows through the fourth oil channel 8 through the return check valve 12, passes through the sixth oil channel 10, and enters the system main return oil channel 11, forming a complete pilot filter element 3 return and self-lubricating cycle, the fourth oil channel 8 connected to the front of the right side of the second oil channel 6 introduces the return liquid of the electromagnetic pilot valve 1 into the connecting thread of the main valve core 13, and then flows to the thread of the main valve core 13 to lubricate the thread of the main valve core 13, the fifth oil channel 9 is connected to the fourth oil channel 8, so that a lubricating oil film can be formed on the thread of the main valve core 13 above, so that the end faces of the main valve core 13 and the pilot filter element 3 are immersed in In the emulsion, since the emulsion itself has the functions of rust prevention, lubrication, and antibacterial, it can effectively reduce the risk of rust on the end faces of the valve core and the pilot filter element 3. At the same time, the seventh oil channel 14 connected to the left side of the second oil channel 6 transports part of the return liquid to the nozzle 15. The interior of the nozzle 15 is a spiral shape of a spiral pipe 18, which can make the ejected emulsion form a rotating flushing flow, and then pass through the main nozzle 16 and the auxiliary nozzle 17 to increase the injection range and flush the surface of the pilot filter element 3. During the flushing process, the rotating emulsion flow can effectively remove impurities on the surface of the filter element and restore the filtering performance of the filter element. When the temperature is lower than the set value, the temperature sensor 19 sends a signal to the heating device 20, and the heating device 20 starts to heat the emulsion to keep the emulsion within a suitable temperature range. Emulsion at appropriate temperature can better exert its anti-rust and lubrication properties, ensuring that the entire electro-hydraulic controlled reversing valve can work stably under different working conditions, especially in the low temperature environment of coal mines, effectively preventing the emulsion from thickening or solidifying due to low temperature, affecting the normal operation of the valve.
[0023] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A self-lubricating electro-hydraulic controlled reversing valve for mining, characterized in that: include: An electromagnetic pilot valve (1), wherein a valve body (2) is fixedly connected to the bottom of the electromagnetic pilot valve (1), a pilot filter element (3) is threadedly connected to the upper left front side of the valve body (2), and a plurality of main valve cores (13) are threadedly connected to the lower right front side of the valve body (2); a third oil passage (7), wherein a liquid return hole (4) is provided at the liquid return position of the electromagnetic pilot valve (1), the liquid return hole (4) is connected to the first oil passage (5) at its outlet, the first oil passage (5) is connected to the second oil passage (6) below, the second oil passage (6) is connected to the third oil passage (7) on the left side, and the other end of the third oil passage (7) is connected to the connecting thread of the pilot filter element (3); A nozzle (15), the second oil passage (6) is connected to the seventh oil passage (14) on the left, the seventh oil passage (14) is provided with a nozzle (15) at the liquid outlet, and the nozzle (15) is arranged inside the valve body (2); A heating device (20) is fixedly connected to the left side above the first oil passage (5) via a valve body (2).
2. The self-lubricating electro-hydraulic controlled reversing valve for mining according to claim 1 is characterized in that: The front right side of the second oil passage (6) is connected to a fourth oil passage (8), and the right end of the fourth oil passage (8) is connected to the connecting thread of the main valve core (13).
3. The mining self-lubricating electro-hydraulic controlled reversing valve according to claim 2 is characterized in that: The left end of the fourth oil passage (8) is connected to a return check valve (12), a sixth oil passage (10) is arranged above the return check valve (12), and the other end of the sixth oil passage (10) is connected to a system main return oil passage (11).
4. The self-lubricating electro-hydraulic controlled reversing valve for mining according to claim 1, characterized in that: The third oil passage (7) is connected to a fourth oil passage (8) below, the fourth oil passage (8) is connected to a fifth oil passage (9) on the right side, and each threaded connection of the main valve core (13) is interconnected via the fifth oil passage (9).
5. The mining self-lubricating electro-hydraulic controlled reversing valve according to claim 1, characterized in that: The top of the nozzle pipe (15) is fixedly connected to a nozzle (21), a main nozzle (16) is arranged in the middle of the nozzle (21), and a secondary nozzle (17) is arranged on the side of the nozzle (21).
6. The mining self-lubricating electro-hydraulic controlled reversing valve according to claim 1, characterized in that: A spiral pipe (18) is arranged inside the nozzle (15).
7. The mining self-lubricating electro-hydraulic controlled reversing valve according to claim 1, characterized in that: A temperature sensor (19) is provided on the right side of the liquid inlet of the first oil channel (5), and the temperature sensor (19) is electrically connected to a heating device (20).
8. The self-lubricating electro-hydraulic controlled reversing valve for mining according to claim 1, characterized in that: The main valve core (13) plug and the pilot filter core (3) plug are made of high-strength polyoxymethylene material, and the valve body (2) is made of stainless steel.