An automatic lubrication system for mines

Abstract

This utility model discloses an automatic lubrication system for mines, including a housing arranged in the mine. It also includes a lubrication mechanism for forming an emulsion-driven lubrication system, a control mechanism for forming an explosion-proof control box, and a monitoring mechanism for forming a multi-point feedback sensing structure. The lubrication mechanism is assembled inside the housing, the control mechanism is located on one side of the lubrication mechanism, and the monitoring mechanism is mounted on the lubrication mechanism. The advantages of this utility model are that the lubrication mechanism and monitoring mechanism work together to drive the lubrication system through emulsion, providing targeted, timed, and quantitative oil injection to multiple underground equipment. Multiple sensors work together to achieve monitoring and feedback. If the lubrication system malfunctions, timely shutdown and maintenance can be performed. The control mechanism adopts a double-layer explosion-proof, intrinsically safe electrical control box structure. Electrical components are arranged and installed in different cavities according to the potential for explosion, avoiding messy wiring and facilitating later maintenance.

Description

Technical Field

[0001] This utility model relates to the technical field of mining lubrication systems, and in particular to an automatic lubrication system for mines. Background Technology

[0002] In the existing technology, the current lubrication monitoring and maintenance work for underground mining equipment mainly focuses on adding grease according to the lubrication cycle required by the equipment. In the daily operation of the equipment, lubrication requires manual grease injection at regular intervals. If grease is not injected beyond the lubrication cycle, the equipment wear will accelerate, the equipment precision will be damaged, and in severe cases, the equipment will jam, causing casualties. The current conventional method for multi-point bearing lubrication is centralized drive and decentralized grease injection, that is: a motor + lubrication pump + oil tank is placed at the far end, and the lubricating oil is delivered to each lubrication point through a grease progressive distributor + multiple oil pipes. This method has several drawbacks when used on site: (1) The progressive distributor is composed of multiple quantitative plunger tubes, which is a mechanical structure. This mechanical structure can only distribute the oil in a fixed way and cannot be flexibly adjusted according to the needs of the site, which is inconvenient to use; (2) When the lubrication points are relatively dispersed, the oil pipe layout is complicated, and the oil supply over long distances requires a large system injection pressure. If the temperature is low or the grease in the pipeline is stored for a long time, the oil pipe resistance will increase and grease injection will be impossible.

[0003] Chinese utility model patent application number 202222099578.X discloses an improvement in the hardware structure of a mining lubrication system; it includes a monitoring master station and N lubrication subsystems, wherein the monitoring master station and the N lubrication subsystems communicate through a mine ring network; the lubrication subsystems include a mining explosion-proof and intrinsically safe control box, multiple mining explosion-proof automatic lubrication mechanisms, and mining intrinsically safe temperature sensors installed at the lubrication points; the mining explosion-proof automatic lubrication mechanism includes an explosion-proof cylinder and a grease tank, the explosion-proof cylinder is equipped with explosion-proof terminals, a motor, and a reducer, the grease tank is equipped with gun-type grease, the motor is connected to the reducer through a coupling, the output end of the reducer is connected to a linkage drive assembly, and the linkage drive assembly is placed in a linkage drive assembly transition cavity under the grease tank cover. However, this type of mining lubrication system does not have a monitoring and feedback function. If the lubrication system malfunctions, it cannot shut down the equipment for maintenance in a timely manner, which poses certain safety hazards. Furthermore, although it uses an intrinsically safe control box, it does not divide the internal space of the control box according to the type of electrical components, resulting in an unreasonable layout of electrical components in the control box and messy wiring, which is inconvenient for later maintenance. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic lubrication system for mines.

[0005] To achieve the above objectives, the technical solution proposed by this utility model is as follows:

[0006] An automatic lubrication system for mines includes a housing arranged in a mine, a lubrication mechanism for constituting an emulsion-driven lubrication system, a control mechanism for constituting an explosion-proof control box, and a monitoring mechanism for constituting a multi-point feedback sensing structure. The lubrication mechanism is assembled in the housing, the control mechanism is arranged on one side of the lubrication mechanism, and the monitoring mechanism is disposed on the lubrication mechanism.

[0007] The lubrication mechanism includes a drive assembly, a distribution assembly, and a loading assembly. The drive assembly is arranged inside the housing on one side, the distribution assembly is assembled on the other side of the housing corresponding to the drive assembly, and the loading assembly is arranged in the lower part of the housing and is corresponding to the distribution assembly.

[0008] The drive assembly includes a dispensing plate, a solenoid valve, a mounting bracket, and a plunger pump. The dispensing plate is located inside the housing and is fixedly connected to the housing via the bracket. The dispensing plate is connected to an external emulsifying pump via a connector. A tee is mounted on the dispensing plate. The solenoid valve is located on one side of the dispensing plate and is fixedly connected to it. The mounting bracket is located on the top inner side of the housing and is fixedly connected to it. The plunger pump is located on the lower inner side of the mounting bracket and is rotatably connected to it. The plunger pump is suspended inside the housing via the mounting bracket, and its pump body is vertically arranged. The pressure inlet and pressure outlet of the plunger pump are connected to the dispensing plate via pipelines. A shut-off ball valve is installed on the pipeline connected to the pressure outlet of the plunger pump, and the output end of the shut-off ball valve passes through the housing.

[0009] The distribution assembly includes a distributor, connecting pipes, and a multi-port connector. The distributor is located inside the housing on the side away from the liquid distribution plate and is fixedly connected to the housing. The distributor consists of several distribution heads and is connected to the oil outlet of the plunger pump via a pipeline. Several connecting pipes are provided, and several connecting pipes are located at the oil outlet end of the distributor and are connected to the oil outlet of the plunger pump via the distributor. The multi-port connector is located on the side wall of the housing corresponding to the connecting pipes, penetrates the housing, and is fixedly connected to the housing. The multi-port connector is connected to the end of the connecting pipe away from the distributor and is connected to the lubrication point of the downhole equipment via an oil outlet pipeline. A safety relief valve is installed on the multi-port connector.

[0010] The loading assembly includes a support tray, a grease tank, and a sealing lid. The support tray is mounted on the inner bottom of the housing. The grease tank is placed on the upper end of the support tray and is arranged correspondingly to the plunger pump. The grease tank is filled with lubricating oil and has an oil pressure plate on its upper inner side. The oil inlet of the plunger pump is located inside the grease tank. The sealing lid is located on the upper end of the grease tank and is fastened to the grease tank. The pump body of the plunger pump passes through the sealing lid and is inserted into the grease tank.

[0011] The control mechanism includes an explosion-proof enclosure body, an intrinsically safe component, and an explosion-proof component. The explosion-proof enclosure body is arranged on one side of the enclosure, the intrinsically safe component is mounted on the upper end of the explosion-proof enclosure body, and the explosion-proof component is arranged on one side of the explosion-proof enclosure body.

[0012] The intrinsically safe component includes a wiring cavity, a mounting cover, and function buttons. The wiring cavity is located at the upper end of the explosion-proof enclosure body and is fixedly connected to the explosion-proof enclosure body by screws. The upper end of the wiring cavity is an open structure, and a through-wall terminal is installed between it and the explosion-proof enclosure body. The through-wall terminal is an explosion-proof through-wall terminal. The mounting cover is located at the upper end of the wiring cavity and is fixedly connected to the wiring cavity by screws. Several flared nozzles are arranged side by side at intervals on the side of the wiring cavity. Several function buttons are provided, and the several function buttons are arranged side by side at intervals on one side of the wiring cavity and are rotatably connected to the wiring cavity.

[0013] The explosion-proof assembly includes an explosion-proof cavity cover, an electrical control module, electrical components, and an inlet device. The explosion-proof cavity cover is located on one side of the explosion-proof enclosure body and is hinged to the explosion-proof enclosure body. The center of the explosion-proof cavity cover is an open structure. The electrical control module is located on the side of the explosion-proof cavity cover near the explosion-proof enclosure body and is fixedly connected to the explosion-proof cavity cover via a bracket. The electrical components include low-power devices and high-power devices. The low-power devices are mounted in the wiring cavity via a wiring mounting bracket, and the high-power devices are mounted in the explosion-proof enclosure body via an explosion-proof mounting bracket. The inlet device is located on one side of the enclosure body and penetrates the enclosure body, and is fixedly connected to the enclosure body. The inlet device is a compression nut type inlet device.

[0014] The monitoring mechanism includes an inlet pressure sensor, an outlet pressure sensor, a pressure gauge after pressure reduction, and an emulsion pressure gauge. The inlet pressure sensor is located at the input end of the dispensing plate and is fixedly connected to the dispensing plate. The outlet pressure sensor is located on the pipeline between the plunger pump and the distributor and is fixedly connected to the corresponding pipeline. The pressure gauge after pressure reduction is located at the input end of the tee and is fixedly connected to the tee. The emulsion pressure gauge is located at the output end of the tee and is fixedly connected to the tee.

[0015] It also includes a weighing sensor and a proximity switch. The weighing sensor is located on the inner bottom of the box corresponding to the carrying tray and is fixedly connected to the box. The carrying tray is located on the weighing sensor and is assembled on the inner bottom of the box through the weighing sensor. The proximity switch is located on the distributor corresponding to the distribution head and is fixedly connected to the distributor. The trigger head of the proximity switch is set opposite to the pointer rod of the distributor's distribution head.

[0016] The beneficial effects of this utility model are:

[0017] Equipped with a lubrication and monitoring mechanism, the lubrication system operates via emulsion-driven lubrication, providing targeted, timed, and quantitative oil injection to multiple large downhole equipment. This saves time and effort, minimizes safety hazards, and utilizes multiple sensors for monitoring and feedback. If a lubrication system malfunctions, the system can be shut down for maintenance promptly, ensuring stable equipment operation. The system also features a control mechanism with a double-layer explosion-proof, intrinsically safe electrical control box structure. Electrical components are strategically arranged and installed in different chambers based on potential explosion hazards, resulting in a rational layout that avoids messy wiring and facilitates future maintenance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the lubrication mechanism of this utility model;

[0020] Figure 3 This is a cross-sectional view of the control mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram illustrating the working principle of this utility model.

[0022] In the diagram: 1. Box body; 2. Dispensing plate; 3. Solenoid valve; 4. Mounting bracket; 5. Plunger pump; 6. Distributor; 7. Connecting pipe; 8. Multi-port connector; 9. Support tray; 10. Grease tank; 11. Sealing tank cover; 12. Explosion-proof box body; 13. Wiring chamber; 14. Mounting chamber cover; 15. Function button; 16. Explosion-proof chamber cover; 17. Electrical control module; 18. Electrical components; 19. Inlet device; 20. Inlet pressure sensor; 21. Outlet pressure sensor; 22. Pressure gauge after pressure reduction; 23. Emulsion pressure gauge; 24. Weighing sensor; 25. Proximity switch. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings.

[0024] An automatic lubrication system for mines includes a housing 1, which is disposed in the mine. It also includes a lubrication mechanism for forming an emulsion-driven lubrication system, a control mechanism for forming an explosion-proof control box, and a monitoring mechanism for forming a multi-point feedback sensing structure. The lubrication mechanism is assembled inside the housing 1, the control mechanism is arranged on one side of the lubrication mechanism, and the monitoring mechanism is mounted on the lubrication mechanism. A schematic diagram of the overall structure of this utility model is shown below. Figure 1 As shown.

[0025] The lubrication mechanism includes a drive assembly, a distribution assembly, and a loading assembly. The drive assembly is located inside the housing 1 on one side, the distribution assembly is mounted on the other side of the housing 1 corresponding to the drive assembly, and the loading assembly is located in the lower part of the inner side of the housing 1 and is corresponding to the distribution assembly. The lubrication mechanism, through the cooperation of the drive assembly, distribution assembly, and loading assembly, constitutes an automatic lubrication system. The drive assembly is used to form an emulsion driving structure, thereby pumping lubricating oil into the distribution assembly. The distribution assembly is used to distribute the lubricating oil and inject it into multiple large downhole equipment at fixed points, times, and quantities. The loading assembly is used to load the lubricating oil. A schematic diagram of the lubrication mechanism of this utility model is shown below. Figure 2 As shown.

[0026] The drive assembly includes a dispensing plate 2, a solenoid valve 3, a mounting bracket 4, and a plunger pump 5. The dispensing plate 2 is located inside the housing 1 on one side and is fixedly connected to the housing 1 via the bracket. The dispensing plate 2 is connected to an external emulsifying pump via a connector. A tee is mounted on the dispensing plate 2. The solenoid valve 3 is located on one side of the dispensing plate 2 and is fixedly connected to it. The mounting bracket 4 is located on the top inner side of the housing 1 and is fixedly connected to it. The plunger pump 5 is located on the lower inner side of the mounting bracket 4 and is rotatably connected to it. The plunger pump 5 is suspended inside the housing 1 via the mounting bracket 4, and its pump body is vertically arranged. The pressure inlet and pressure outlet of the plunger pump 5 are connected to the dispensing plate 2 via pipelines. A shut-off ball valve is installed on the pipeline connected to the pressure outlet of the plunger pump 5, and the output end of the shut-off ball valve passes through the housing 1. The drive assembly consists of the dispensing plate 2, the solenoid valve 3, the mounting bracket 4, and the plunger pump 5. Pump 5, in conjunction with the emulsion, forms an emulsion drive structure to pump lubricating oil into the distribution assembly. The distribution plate 2 serves as the inlet and outlet of the control valve assembly, connecting the main inlet and outlet to create an emulsion leaching channel. A filter screen can be configured within this plate to filter impurities from the emulsion. A solenoid valve 3 controls the rotation direction of the plunger pump 5. The mounting bracket 4 serves as the mounting structure on the top inner side of the housing 1, providing support for the plunger pump 5. Driven by the emulsion, the plunger pump 5 adds lubricating oil to the lubrication points of the mining equipment via the lubrication mechanism. The plunger pump 5 can rotate 90 degrees relative to the mounting bracket 4. When the lubricating oil needs to be changed, the plunger pump 5 is rotated 90 degrees relative to the mounting bracket 4, the empty grease container 10 is removed, and a new grease container 10 filled with lubricating oil is placed on the support tray 9.

[0027] The distribution assembly includes a distributor 6, connecting pipes 7, and a multi-port connector 8. The distributor 6 is located inside the housing 1 on the side away from the liquid distribution plate 2 and is fixedly connected to the housing 1. The distributor 6 consists of several distributing heads and is connected to the oil outlet of the plunger pump 5 via a pipeline. Several connecting pipes 7 are provided, located at the oil outlet of the distributor 6 and connected to the oil outlet of the plunger pump 5 via the distributor 6. The multi-port connector 8 is located on the side wall of the housing 1 corresponding to the connecting pipes 7, penetrates the housing 1, and is fixedly connected to the housing 1. The multi-port connector 8 and the connecting pipes 7 are located away from the distributor. One end of 6 is connected to the lubrication point of the downhole equipment via the oil outlet pipeline. A safety relief valve is installed on the multi-port connector 8. The distribution assembly, through the cooperation of the distributor 6, the connecting pipe 7 and the multi-port connector 8, distributes the lubricating oil and injects oil into multiple large downhole equipment at fixed points, times and quantities. The distributor 6 is used to distribute the lubricating oil discharged from the plunger pump 5 to meet the lubrication needs of multiple channels. The connecting pipe 7 is used to connect the distributor 6 and the multi-port connector 8. The multi-port connector 8 is used to connect to the lubrication point of the downhole equipment via the oil outlet pipeline to meet the lubrication needs of the downhole equipment.

[0028] The loading assembly includes a support tray 9, a grease tank 10, and a sealing lid 11. The support tray 9 is mounted on the inner bottom of the housing 1. The grease tank 10 is placed on top of the support tray 9 and is arranged correspondingly to the plunger pump 5. The grease tank 10 contains lubricating oil, and a pressure plate is arranged on the upper inner side of the grease tank 10. The oil inlet of the plunger pump 5 is located inside the grease tank 10. The sealing lid 11 is located on top of the grease tank 10 and is fastened to the grease tank 10. The pump body of the plunger pump 5 passes through the sealing lid 11 and is inserted into the grease tank 10. The loading assembly is connected via... The lubricating oil is loaded through the cooperation of the support tray 9, the grease tank 10 and the sealing lid 11. The support tray 9 serves as a support structure on the weighing sensor 24, thereby providing support for the grease tank 10. The grease tank is used to store the lubricating oil. The sealing lid 11 is used to seal the grease tank 10 to prevent external debris from entering the grease tank 10 and causing blockage of the plunger pump 5 or the lubrication mechanism. The pressure plate is used to press the lubricating oil in the grease tank 10 to ensure that the lubricating oil is always at the bottom of the grease tank 10 and to avoid the formation of cavities inside the lubricating oil.

[0029] The control mechanism includes an explosion-proof enclosure body 12, an intrinsically safe component, and a flameproof component. The explosion-proof enclosure body 12 is located on one side of the enclosure 1. The intrinsically safe component is mounted on the upper end of the explosion-proof enclosure body 12, and the flameproof component is located on one side of the explosion-proof enclosure body 12. The control mechanism, through the cooperation of the explosion-proof enclosure body 12, the intrinsically safe component, and the flameproof component, forms a double-layer explosion-proof cavity structure control box. The explosion-proof enclosure body 12 serves as the main structure of the control mechanism. The intrinsically safe component, together with the explosion-proof enclosure body 12, constitutes the intrinsically safe explosion-proof enclosure structure of the double-layer enclosure 1. The flameproof component serves as the opening structure on one side of the explosion-proof enclosure body 12, thereby achieving the explosion-proof effect of the electrical control box. A cross-sectional view of the control mechanism of this utility model is shown below. Figure 3 As shown.

[0030] The intrinsically safe component includes a wiring cavity 13, a mounting cover 14, and function buttons 15. The wiring cavity 13 is located at the upper end of the explosion-proof enclosure body 12 and is fixedly connected to the explosion-proof enclosure body 12 by screws. The upper end of the wiring cavity 13 has an open structure, and a through-wall terminal is installed between it and the explosion-proof enclosure body 12. The through-wall terminal is an explosion-proof through-wall terminal. The mounting cover 14 is located at the upper end of the wiring cavity 13 and is fixedly connected to the wiring cavity 13 by screws. Several flared nozzles are arranged side by side at intervals on the side of the wiring cavity 13. Several function buttons 15 are arranged side by side at intervals on one side of the wiring cavity 13 and are rotatably connected to the wiring cavity 13. The intrinsically safe component is connected through the wiring cavity. 13. The mounting cover 14 and function button 15 work together with the explosion-proof box body 12 to form an intrinsically safe explosion-proof box structure of double-layer box 1. The wiring cavity 13 serves as the cavity structure at the upper end of the explosion-proof box body 12 to form an intrinsically safe explosion-proof box structure of double-layer box 1 together with the explosion-proof box body 12. The mounting cover 14 serves as the cover structure on the wiring cavity 13 to seal the wiring cavity 13, thereby forming a sealed cavity structure together with the wiring cavity 13 to meet the installation requirements of low-power devices. The flared nozzle serves as the connection structure on the side of the wiring cavity 13 to meet the connection requirements of the internal devices of the wiring cavity 13. The working status of the lubrication system can be controlled by the function button 15.

[0031] The explosion-proof assembly includes an explosion-proof cavity cover 16, an electrical control module 17, electrical components 18, and an inlet device 19. The explosion-proof cavity cover 16 is located on one side of the explosion-proof enclosure body 12 and is hinged to the explosion-proof enclosure body 12. The center of the explosion-proof cavity cover 16 is an open structure. The electrical control module 17 is located on the side of the explosion-proof cavity cover 16 near the explosion-proof enclosure body 12 and is fixedly connected to the explosion-proof cavity cover 16 via a bracket. The electrical components 18 include low-power devices and high-power devices. The low-power devices are mounted in the wiring cavity 13 via a wiring mounting bracket, and the high-power devices are mounted in the explosion-proof enclosure body 12 via an explosion-proof mounting bracket. The inlet device 19 is located on one side of the enclosure 1 and passes through the enclosure 1, and is fixedly connected to the enclosure 1. The inlet device 19 is a compression nut type inlet device 19. The electrical control module 17 is electrically connected to the solenoid valve 3 via a cable. The electrical components 18 and the electrical control module 19 are connected to the explosion-proof enclosure body 12. Block 17 and the monitoring mechanism are electrically connected. The explosion-proof assembly, through the explosion-proof cavity cover 16, the electrical control module 17, the electrical components 18, and the introduction device 19, works together to serve as an opening structure on one side of the explosion-proof box body 12 to achieve the explosion-proof effect of the electrical control box. The explosion-proof cavity cover 16 is used as the cavity cover structure of the explosion-proof box body 12 to seal the explosion-proof box body 12. The electrical control module 17 is used as the electrical control part of the explosion-proof box body 12. The electrical components 18 are used as the electrical part of the electrical control box. The introduction device 19 adopts a compression nut type introduction device 19 to serve as a sealed cable or conduit inlet of the electrical control box to prevent external explosive gases from entering the box 1 and to avoid internal sparks or high temperatures causing external hazards. The wall-penetrating terminal adopts an explosion-proof wall-penetrating terminal to enable the safe passage of cables or wires while maintaining the explosion-proof performance of the equipment.

[0032] The monitoring mechanism includes an inlet pressure sensor 20, an outlet pressure sensor 21, a pressure gauge after pressure reduction 22, and an emulsion pressure gauge 23. The inlet pressure sensor 20 is located at the input end of the dispensing plate 2 and is fixedly connected to it. The outlet pressure sensor 21 is located on the pipeline between the plunger pump 5 and the distributor 6 and is fixedly connected to the corresponding pipeline. The pressure gauge after pressure reduction 22 is located at the input end of the tee and is fixedly connected to it. The emulsion pressure gauge 23 is located at the output end of the tee and is fixedly connected to it. The monitoring mechanism works in conjunction with the inlet pressure sensor 20, the outlet pressure sensor 21, the pressure gauge after pressure reduction 22, and the emulsion pressure gauge 23. The equipment's monitoring structure is used to monitor its operating status. The inlet pressure sensor 20 monitors the inlet pressure of the drive mechanism, and the outlet pressure sensor 21 monitors the outlet pressure of the plunger pump 5. If the inlet pressure and outlet pressure are different, it indicates that the lubricating oil in the grease tank 10 is insufficient or that the drive equipment is leaking, requiring maintenance by personnel. The pressure gauge 22 after depressurization is used to detect the pressure of the emulsion after depressurization, and the emulsion pressure gauge 23 is used to detect the drive pressure of the emulsion. If the inlet pressure and outlet pressure are different, it indicates that the liquid distribution plate 2 is malfunctioning, requiring repair by personnel.

[0033] It also includes a weighing sensor 24 and a proximity switch 25. The weighing sensor 24 is located on the inner bottom of the housing 1 and is fixedly connected to the housing 1, corresponding to the support tray 9. The support tray 9 is mounted on the weighing sensor 24 and is assembled on the inner bottom of the housing 1 through the weighing sensor 24. The proximity switch 25 is located on the distributor 6 and is fixedly connected to the distributor 6, corresponding to the distribution head. The trigger head of the proximity switch 25 is set opposite to the pointer rod of the distribution head of the distributor 6. The weighing sensor 24 is used to monitor the weight of the grease tank 10 to provide feedback on the remaining amount of lubricating oil in the grease tank 10. When the inlet pressure and outlet pressure are different, the weighing sensor 24 can be used to troubleshoot the different data. The proximity switch 25 is used to detect the number of times the distribution head moves, thereby monitoring the operating status of the lubrication mechanism.

[0034] The control process of the electrical control box is as follows:

[0035] Upon power-on, the system monitors the status of each sensor:

[0036] A: The pressure of the inlet pressure sensor 20 is the power source for driving the bucket pump. If this pressure is low, for example, below a certain value, the system can be set to alarm and stop working.

[0037] B: The pressure of outlet pressure sensor 21. This pressure is the pressure of the outlet lubricating oil. If this pressure is too high or too low, the system can be set to alarm and stop working.

[0038] C: The value of the weighing sensor 24. This value indirectly reflects how much lubricating oil is left in the grease tank 10. If this value is lower than a certain value, it can be set so that the system alarms and stops working.

[0039] If all sensors are at normal values, the system starts and enters automatic control mode. It controls the switching of solenoid valves 3A and 3B coils. The energizing time and interval of coils A and B can be set on the page as needed, thereby controlling the piston pump 5. A manual control mode can also be set. In manual mode, the switching time interval of solenoid valves 3A and 3B coils and the energizing time of each coil are the same as in automatic mode. The duration of manual control can be set, and the system automatically switches to automatic mode after the set time. During operation, the system monitors the value of proximity switch 25 in real time. Under normal circumstances, the amount of oil injected with each movement of the distributor 6 pointer is fixed. The system can detect and control the amount of lubricating oil by observing the number of pointer movements of distributor 6. Furthermore, if the system cannot detect the distributor 6 pointer reading, it defaults to a blocked oil outlet or a malfunction of distributor 6. In this case, the system stops working and issues an alarm.

[0040] M = I * N, where: M: grease output; I: output per action; N: number of actions of distributor 6 proximity switch 25.

[0041] During operation, the system continuously monitors the value of the inlet pressure sensor 20. Normally, it is 20 MPa. If it falls below the set value by 10%, the system alarms but does not shut down. If it falls below the set value by 20%, the system alarms and stops operating. Additionally, if the system detects a very low value, such as 0 MPa, it assumes the inlet filter is clogged, and the system shuts down and alarms. During operation, the system also continuously monitors the value of the outlet pressure sensor 21. Normally, this value is slightly lower than the inlet pressure. If it detects a value higher than the inlet pressure, the system assumes the outlet pipeline is blocked and will issue an alarm.

[0042] Input and output pressure value calculation:

[0043] P = A * L / F, where P: input, actual input pressure value; A: input, output pressure sensor readings; L: sensor range parameter; F: analog channel resolution.

[0044] During operation, the system monitors the value of the weighing sensor 24 in real time. Based on this value, the system estimates how much lubricating oil is left in the grease tank 10. If this value is lower than the set value, the system will issue an alarm but will not stop. If this value is very low, the system will determine that the lubricating grease has been used up, and at this time the system will stop working and issue an alarm.

[0045] Formula for calculating remaining grease:

[0046] P = {{(A+X) / 10}-O} / 9.8 / K, where P: percentage of remaining grease; A: parameter returned by weighing sensor 24; O: gross weight parameter; X: zero-point correction parameter; K: total assembly weight.

[0047] Working principle:

[0048] The system employs an emulsion-driven mechanism. The emulsion, supplied underground in the coal mine, typically operates at a pressure of 30 MPa. It is first reduced to 15-20 MPa by a high-pressure regulating valve, then flows through a distribution plate 2 with an internal filter into an explosion-proof solenoid valve 3. This valve 3 is controlled by a control mechanism that periodically switches the emulsion output direction, controlling the extension and retraction of the plunger pump 5. The plunger pump 5 outputs a measured amount of grease to the distributor 6, which then distributes the lubricating grease proportionally to the lubrication points of the equipment. If a lubrication point in the system becomes blocked, the distributor 6 will malfunction, causing the overall system pressure to rise. In this case, the safety relief valve will automatically open to release pressure, ensuring system safety. Once the grease in the 15kg grease container 10 is depleted, it can be directly replaced. The 15kg grease container 10 is a standard product available on the market. The schematic diagram of the working principle of this utility model is shown below. Figure 4 As shown.

[0049] The beneficial effects of this utility model are that it has a lubrication mechanism and a monitoring mechanism working together. The lubrication system is driven by emulsion to inject oil into multiple large downhole equipment at fixed points, times and quantities, saving time and effort and reducing safety hazards. In addition, multiple sensors work together to achieve monitoring and feedback. If the lubrication system fails, the system can be shut down for maintenance in time to ensure stable operation of the equipment. It has a control mechanism, which adopts a double-layer explosion-proof cavity intrinsically safe electrical control box structure. The electrical components are arranged and installed in different cavities according to the explosive situation. The layout is reasonable, avoids messy wiring, and facilitates the later maintenance work.

[0050] The above description details one embodiment of the present utility model, but it is merely a preferred embodiment and should not be construed as limiting the scope of the present utility model. All equivalent variations and improvements made within the scope of the present utility model application should still fall within the patent coverage of the present utility model.

Claims

1. An automatic lubrication system for mines, comprising a housing (1) arranged in a mine, characterized in that, It also includes a lubrication mechanism for constituting an emulsion-driven lubrication system, a control mechanism for constituting an explosion-proof control box, and a monitoring mechanism for constituting a multi-point feedback sensing structure. The lubrication mechanism is assembled inside the box (1), the control mechanism is arranged on one side of the lubrication mechanism, and the monitoring mechanism is arranged on the lubrication mechanism.

2. The automatic lubrication system for mines as described in claim 1, characterized in that, The lubrication mechanism includes a drive assembly, a distribution assembly, and a loading assembly. The drive assembly is arranged inside one side of the housing (1), the distribution assembly is assembled inside the housing (1) on the other side, and the loading assembly is arranged in the lower part of the inner side of the housing (1) and is corresponding to the distribution assembly.

3. The automatic lubrication system for mines as described in claim 2, characterized in that, The drive assembly includes a dispensing plate (2), a solenoid valve (3), a mounting bracket (4), and a plunger pump (5). The dispensing plate (2) is located inside the housing (1) on one side and is fixedly connected to the housing (1) via the bracket. The dispensing plate (2) is connected to an external emulsifying pump via a connector. A tee is mounted on the dispensing plate (2). The solenoid valve (3) is located on one side of the dispensing plate (2) and is fixedly connected to the dispensing plate (2). The mounting bracket (4) is located on the inner top of the housing (1). The plunger pump (5) is fixedly connected to the housing (1) and is located on the lower inner side of the mounting bracket (4) and rotatably connected to the mounting bracket (4). The plunger pump (5) is suspended in the housing (1) through the mounting bracket (4) and its pump body is arranged vertically. The pressure inlet and pressure outlet of the plunger pump (5) are connected to the liquid distribution plate (2) through the pipeline. A shut-off ball valve is configured on the pipeline connected to the pressure outlet of the plunger pump (5) and the output end of the shut-off ball valve passes through the housing (1).

4. The automatic lubrication system for mines as described in claim 3, characterized in that, The distribution assembly includes a distributor (6), a connecting pipe (7), and a multi-port connector (8). The distributor (6) is located inside the housing (1) on the side away from the liquid distribution plate (2) and is fixedly connected to the housing (1). The distributor (6) consists of several distribution heads and is connected to the oil outlet of the plunger pump (5) via a pipeline. Several connecting pipes (7) are provided, and several connecting pipes (7) are located at the oil outlet end of the distributor (6) and are connected to the oil outlet of the plunger pump (5) via the distributor (6). The multi-port connector (8) is located on the side wall of the housing (1) corresponding to the connecting pipe (7) and passes through the housing (1) and is fixedly connected to the housing (1). The multi-port connector (8) is connected to the end of the connecting pipe (7) away from the distributor (6) and is connected to the lubrication point of the downhole equipment via the oil outlet pipeline. A safety relief valve is installed on the multi-port connector (8).

5. An automatic lubrication system for mines as described in claim 4, characterized in that, The loading assembly includes a support tray (9), a grease tank (10), and a sealing lid (11). The support tray (9) is mounted on the inner bottom of the housing (1). The grease tank (10) is placed on the upper end of the support tray (9) and is arranged correspondingly to the plunger pump (5). The grease tank (10) is filled with lubricating oil and a pressure plate is arranged on the upper inner side of the grease tank (10). The oil inlet of the plunger pump (5) is arranged inside the grease tank (10). The sealing lid (11) is set on the upper end of the grease tank (10) and is fastened to the grease tank (10). The pump body of the plunger pump (5) passes through the sealing lid (11) and is inserted into the grease tank (10).

6. The automatic lubrication system for mines as described in claim 5, characterized in that, The control mechanism includes an explosion-proof enclosure body (12), an intrinsically safe component, and an explosion-proof component. The explosion-proof enclosure body (12) is arranged on one side of the enclosure (1), the intrinsically safe component is mounted on the upper end of the explosion-proof enclosure body (12), and the explosion-proof component is arranged on one side of the explosion-proof enclosure body (12).

7. An automatic lubrication system for mines as described in claim 6, characterized in that, The intrinsically safe component includes a wiring cavity (13), a mounting cover (14), and function buttons (15). The wiring cavity (13) is located at the upper end of the explosion-proof box body (12) and is fixedly connected to the explosion-proof box body (12) by screws. The upper end of the wiring cavity (13) is an open structure and a wall-penetrating terminal is installed between it and the explosion-proof box body (12). The wall-penetrating terminal is an explosion-proof wall-penetrating terminal. The mounting cover (14) is located at the upper end of the wiring cavity (13) and is fixedly connected to the wiring cavity (13) by screws. The side of the wiring cavity (13) is equipped with several horn-shaped nozzles arranged side by side at intervals. Several function buttons (15) are provided. Several function buttons (15) are arranged side by side at intervals on one side of the wiring cavity (13) and are rotatably connected to the wiring cavity (13).

8. An automatic lubrication system for mines as described in claim 7, characterized in that, The explosion-proof assembly includes an explosion-proof cavity cover (16), an electrical control module (17), electrical components (18), and an introduction device (19). The explosion-proof cavity cover (16) is located on one side of the explosion-proof box body (12) and is hinged to the explosion-proof box body (12). The middle part of the explosion-proof cavity cover (16) is set as an open structure. The electrical control module (17) is located on the side of the explosion-proof cavity cover (16) close to the explosion-proof box body (12) and is fixedly connected to the explosion-proof cavity cover (16) through a bracket. The electrical components (18) include low-power devices and high-power devices. The low-power devices are assembled in the wiring cavity (13) via a wiring mounting bracket, and the high-power devices are assembled in the explosion-proof box body (12) via an explosion-proof mounting bracket. The introduction device (19) is located on one side of the box body (1) and passes through the box body (1) and is fixedly connected to the box body (1). The introduction device (19) is a compression nut type introduction device (19).

9. An automatic lubrication system for mines as described in claim 8, characterized in that, The monitoring mechanism includes an inlet pressure sensor (20), an outlet pressure sensor (21), a pressure gauge after depressurization (22), and an emulsion pressure gauge (23). The inlet pressure sensor (20) is located at the input end of the liquid distribution plate (2) and is fixedly connected to the liquid distribution plate (2). The outlet pressure sensor (21) is located on the pipeline between the plunger pump (5) and the distributor (6) and is fixedly connected to the corresponding pipeline. The pressure gauge after depressurization (22) is located at the input end of the tee and is fixedly connected to the tee. The emulsion pressure gauge (23) is located at the output end of the tee and is fixedly connected to the tee.

10. An automatic lubrication system for mines as described in claim 9, characterized in that, It also includes a weighing sensor (24) and a proximity switch (25). The weighing sensor (24) is located on the inner bottom of the box (1) corresponding to the carrying tray (9) and is fixedly connected to the box (1). The carrying tray (9) is located on the weighing sensor (24) and is assembled on the inner bottom of the box (1) through the weighing sensor (24). The proximity switch (25) is located on the distributor (6) corresponding to the distribution head and is fixedly connected to the distributor (6). The trigger head of the proximity switch (25) is set opposite to the pointer rod of the distribution head of the distributor (6).

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