A driving system of a coal discharging mechanism

Abstract

The disclosure provides a kind of driving system of coal discharging mechanism, comprising: liquid supply unit, first energy storage unit and second energy storage unit;First energy storage unit and second energy storage unit respectively include: energy accumulator;Wherein, when the liquid supply end of liquid supply unit and the rodless cavity of executing element are communicated, and the liquid return end of liquid supply unit and the rod cavity of executing element are communicated, the energy accumulator in first energy storage unit and liquid supply unit are used to supply liquid to the rodless cavity of executing element;When the liquid supply end of liquid supply unit and the rod cavity of executing element are communicated, and the liquid return end of liquid supply unit and the rodless cavity of executing element are communicated, the energy accumulator in second energy storage unit and liquid supply unit are used to supply liquid to the rod cavity of executing element.In the driving system of coal discharging mechanism of the disclosure, long pipeline pressure loss can be eliminated, and the response speed of executing element is accelerated, so that the rapid action of coal discharging mechanism is realized.

Description

Technical Field

[0001] This disclosure relates to the field of coal discharge technology, and more particularly to a drive system for a coal discharge mechanism. Background Technology

[0002] The coal discharge mechanism is an important device of the top coal caving hydraulic support. It is used to crush the top coal in the goaf and discharge it to the scraper conveyor. It is a key component to improve the coal recovery rate. However, due to the pressure loss in the traditional pump station fluid supply, the coal discharge mechanism has problems such as long operation time and slow coal discharge speed, which leads to reduced working face production efficiency, decreased top coal recovery rate and increased safety risks. Summary of the Invention

[0003] This disclosure aims to at least partially address one of the technical problems in the related art.

[0004] Therefore, the purpose of this disclosure is to provide a drive system for a coal feeding mechanism.

[0005] To achieve the above objectives, this disclosure provides a drive system for a coal discharge mechanism, comprising: a liquid supply unit, a first energy storage unit, and a second energy storage unit; the first energy storage unit and the second energy storage unit each comprise: an accumulator, wherein the liquid exchange end of the accumulator in the first energy storage unit is connected to the rodless cavity of the actuator in the coal discharge mechanism, and the liquid exchange end of the accumulator in the second energy storage unit is connected to the rod cavity of the actuator; wherein, when the liquid supply end of the liquid supply unit is connected to the rodless cavity of the actuator, and the liquid return end of the liquid supply unit is connected to the rod cavity of the actuator, the accumulator and the liquid supply unit in the first energy storage unit are used to supply liquid to the rodless cavity of the actuator; when the liquid supply end of the liquid supply unit is connected to the rod cavity of the actuator, and the liquid return end of the liquid supply unit is connected to the rodless cavity of the actuator, the accumulator and the liquid supply unit in the second energy storage unit are used to supply liquid to the rod cavity of the actuator.

[0006] Optionally, the drive system further includes: a first valve body, a first end of which is connected to the supply end of the liquid supply unit, a second end of which is connected to the return end of the liquid supply unit, a third end of which is connected to the rodless chamber of the actuator, and a fourth end of which is connected to the rod-side chamber of the actuator; wherein, the liquid exchange end of the accumulator in the first energy storage unit is disposed between the third end of the first valve body and the rodless chamber of the actuator, and the liquid exchange end of the accumulator in the second energy storage unit is disposed between the fourth end of the first valve body and the rod-side chamber of the actuator; when the first When the first and third ends of the valve body are connected and the second and fourth ends are connected, the accumulator and the liquid supply unit in the first energy storage unit are used to supply liquid to the rodless chamber of the actuator, and after the liquid supply to the rodless chamber of the actuator is completed, the liquid supply unit is used to supply liquid to the accumulator in the first energy storage unit; when the first and fourth ends of the first valve body are connected and the second and third ends are connected, the accumulator and the liquid supply unit in the second energy storage unit are used to supply liquid to the rod chamber of the actuator, and after the liquid supply to the rod chamber of the actuator is completed, the liquid supply unit is used to supply liquid to the accumulator in the second energy storage unit.

[0007] Optionally, the first energy storage unit and the second energy storage unit each further include: a second valve body, the first end of which is connected to the liquid exchange end of the accumulator; the first end and the second end of the second valve body in the first energy storage unit are respectively connected to the third end of the first valve body, and the third end of the second valve body in the first energy storage unit is connected to the rodless cavity of the actuator; the first end and the second end of the second valve body in the second energy storage unit are respectively connected to the fourth end of the first valve body, and the third end of the second valve body in the second energy storage unit is connected to the rod cavity of the actuator; wherein, when the first end and the third end of the first valve body are connected and the second end and the fourth end are connected, the first end and the third end of the second valve body in the first energy storage unit are connected, and the second end and the third end of the second valve body in the second energy storage unit are connected; and when the first end and the fourth end of the first valve body are connected and the second end and the third end are connected, the second end and the third end of the second valve body in the first energy storage unit are connected, and the first end and the third end of the second valve body in the second energy storage unit are connected.

[0008] Optionally, the first energy storage unit and the second energy storage unit each further include: a third valve body, the second end of which is connected to the first end of the second valve body and the liquid exchange end of the accumulator, respectively; the first end of the third valve body in the first energy storage unit is connected to the third end of the first valve body, and the first end of the third valve body in the second energy storage unit is connected to the fourth end of the first valve body; wherein, when the first end and the third end of the first valve body are connected and the second end and the fourth end are connected, the first end and the second end of the third valve body in the first energy storage unit are connected, and the first end and the second end of the third valve body in the second energy storage unit are disconnected; and when the first end and the fourth end of the first valve body are connected and the second end and the third end are connected, the first end and the second end of the third valve body in the first energy storage unit are disconnected, and the first end and the second end of the third valve body in the second energy storage unit are connected.

[0009] Optionally, the first energy storage unit and the second energy storage unit each further include: a pressure detection unit, wherein the detection end of the pressure detection unit is disposed at the liquid exchange end of the energy storage unit, and the pressure detection unit is used to detect the pressure at the liquid exchange end of the energy storage unit; wherein, when the pressure at the liquid exchange end of the energy storage unit exceeds a first preset pressure, the first end and the second end of the third valve body are disconnected, so that the liquid supply unit stops supplying liquid to the energy storage unit.

[0010] Optionally, the drive system further includes: a hydraulic lock, the first end of which is connected to the third end of the second valve body in the first energy storage unit, and the second end of which is connected to the third end of the second valve body in the second energy storage unit; the third end of which is connected to the rodless cavity of the actuator; and the fourth end of which is connected to the rod cavity of the actuator; wherein, when the first and third ends of the first valve body are connected and the second and fourth ends are connected, or when the first and fourth ends of the first valve body are connected and the second and third ends are connected, the first and third ends of the hydraulic lock are connected and the second and fourth ends are connected.

[0011] Optionally, the liquid supply unit includes: a hydraulic pump, the liquid supply end of which is connected to the first end of the first valve body, and the liquid return end of which is connected to the second end of the first valve body; and a drive motor, the power output end of which is connected to the power input end of the hydraulic pump.

[0012] Optionally, the liquid supply unit further includes: a displacement detection unit for detecting the displacement of the piston rod in the actuator; and a control module, wherein the signal input terminal of the control module is connected to the signal output terminal of the displacement detection unit, and the signal output terminal of the control module is connected to the signal input terminal of the drive motor, and the control module is used to control the switching and speed of the drive motor according to the displacement of the piston rod in the actuator.

[0013] Optionally, the liquid supply unit further includes a safety valve, the first end of which is connected to the liquid supply end of the hydraulic pump, and the second end of which is connected to the liquid return end of the hydraulic pump. When the pressure at the liquid supply end of the hydraulic pump exceeds a second preset pressure, the first and second ends of the safety valve are connected.

[0014] Optionally, the fluid supply unit further includes: an oil tank, the fluid exchange end of which is connected to the fluid supply end and the fluid return end of the hydraulic pump respectively; a first check valve, which is disposed between the fluid exchange end of the oil tank and the fluid supply end of the hydraulic pump, and the inlet end of the first check valve is connected to the fluid exchange end of the oil tank, and the outlet end of the first check valve is connected to the fluid supply end of the hydraulic pump; and a second check valve, which is disposed between the fluid exchange end of the oil tank and the fluid return end of the hydraulic pump, and the inlet end of the second check valve is connected to the fluid return end of the hydraulic pump, and the outlet end of the second check valve is connected to the fluid exchange end of the oil tank.

[0015] The technical solution provided in this disclosure may include the following beneficial effects:

[0016] Because the liquid exchange end of the accumulator in the first energy storage unit is connected to the rodless chamber of the actuator in the coal discharge mechanism, and the liquid exchange end of the accumulator in the second energy storage unit is connected to the rod chamber of the actuator, when the liquid supply end of the liquid supply unit is connected to the rodless chamber of the actuator, and the liquid return end of the liquid supply unit is connected to the rod chamber of the actuator, the accumulator and the liquid supply unit in the first energy storage unit can simultaneously supply liquid to the rodless chamber of the actuator. Similarly, when the liquid supply end of the liquid supply unit is connected to the rod chamber of the actuator, and the liquid return end of the liquid supply unit is connected to the rodless chamber of the actuator, the accumulator and the liquid supply unit in the second energy storage unit can simultaneously supply liquid to the rod chamber of the actuator. Therefore, by utilizing the liquid replenishment of the accumulators, pressure loss in long pipelines can be eliminated, the response speed of the actuator can be accelerated, thereby achieving rapid operation of the coal discharge mechanism, and ultimately improving the working face production efficiency, top coal recovery rate, and safety.

[0017] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 This is a schematic diagram of the drive system of a coal feeding mechanism according to an embodiment of the present disclosure;

[0020] As shown in the figure: 1. Liquid supply unit, 11. Hydraulic pump, 12. Drive motor, 13. Displacement detection unit, 14. Control module, 15. Safety valve, 16. Oil tank, 17. First check valve, 18. Second check valve.

[0021] 2. First energy storage unit; 3. Second energy storage unit; 21. Accumulator; 22. Second valve body; 23. Third valve body; 24. Pressure detection unit;

[0022] 4. First valve body; 5. Hydraulic lock;

[0023] 100. Actuating element. Detailed Implementation

[0024] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are used only to explain this disclosure, and should not be construed as limiting this disclosure. Rather, embodiments of this disclosure include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0025] like Figure 1 As shown in the present invention, an embodiment of a coal discharge mechanism is proposed, comprising: a liquid supply unit 1, a first energy storage unit 2, and a second energy storage unit 3. The first energy storage unit 2 and the second energy storage unit 3 each include: an accumulator 21. The liquid exchange end of the accumulator 21 in the first energy storage unit 2 is connected to the rodless cavity of the actuator 100 in the coal discharge mechanism, and the liquid exchange end of the accumulator 21 in the second energy storage unit 3 is connected to the rod cavity of the actuator 100. Specifically, when the liquid supply end of the liquid supply unit 1 is connected to the rodless cavity of the actuator 100, and the liquid return end of the liquid supply unit 1 is connected to the rod cavity of the actuator 100, the accumulator 21 and the liquid supply unit 1 in the first energy storage unit 2 are used to supply liquid to the rodless cavity of the actuator 100; when the liquid supply end of the liquid supply unit 1 is connected to the rod cavity of the actuator 100, and the liquid return end of the liquid supply unit 1 is connected to the rodless cavity of the actuator 100, the accumulator 21 and the liquid supply unit 1 in the second energy storage unit 3 are used to supply liquid to the rod cavity of the actuator 100.

[0026] It is understandable that, since the liquid exchange end of the accumulator 21 in the first energy storage unit 2 is connected to the rodless cavity of the actuator 100 in the coal discharge mechanism, and the liquid exchange end of the accumulator 21 in the second energy storage unit 3 is connected to the rod cavity of the actuator 100, when the liquid supply end of the liquid supply unit 1 is connected to the rodless cavity of the actuator 100, and the liquid return end of the liquid supply unit 1 is connected to the rod cavity of the actuator 100, the accumulator 21 in the first energy storage unit 2 and the liquid supply unit 1 can simultaneously supply liquid to the rodless cavity of the actuator 100. Furthermore, when the liquid supply end of the liquid supply unit 1 is connected to the rod cavity of the actuator 100, and the liquid return end of the liquid supply unit 1 is connected to the rodless cavity of the actuator 100, the accumulator 21 in the second energy storage unit 3 and the liquid supply unit 1 can simultaneously supply liquid to the rod cavity of the actuator 100. Therefore, by utilizing the replenishment of the accumulator 21, the pressure loss in the long pipeline can be eliminated, the response speed of the actuator 100 can be accelerated, thereby enabling the coal feeding mechanism to operate quickly, and thus improving the working face production efficiency, top coal recovery rate and safety.

[0027] It should be noted that the core problems caused by the long operating time of traditional coal feeding mechanisms are as follows:

[0028] (1) Reduced production efficiency:

[0029] Extended cycle time: Slow coal discharge speed will slow down the entire coal mining cycle (coal cutting-support shifting-coal discharge-conveyor pushing), resulting in a decrease in the advance of the working face and a reduction in the average daily output.

[0030] Equipment idle time: The coal mining machine may need to stop frequently to wait for the coal to be discharged, resulting in low equipment utilization and increased energy consumption.

[0031] (2) Decreased top coal recovery rate:

[0032] Insufficient coal discharge: Slow operation may cause the coal discharge port to close prematurely, and the remaining top coal will not be fully discharged, directly reducing the recovery rate (the top coal recovery rate is usually required to be ≥85%).

[0033] Risk of gangue contamination: If the coal discharge time is not properly controlled, the coal discharge may be forced to stop due to the collapse of gangue on the roof, resulting in further loss of coal resources.

[0034] (3) Increased security risks:

[0035] Difficulties in roof control: Slow coal release may delay timely support of the supports, leading to partial collapse of the roof or top coal, and causing problems such as roof fall and spalling in front of the supports.

[0036] Gas accumulation: In gas mines, slow coal discharge may prolong the time of top coal collapse, increase the amount of gas emitted from the goaf, and increase the risk of gas accumulation.

[0037] In the relevant embodiments, the technical measures to solve the problem of long operation time of the coal feeding mechanism mainly include the following:

[0038] (1) Increase the flow rate of liquid supply: Select a liquid supply equipment with a larger displacement to provide more hydraulic oil to the coal feeding mechanism, speed up the action speed of the actuator 100, and thus shorten the action time of the coal feeding mechanism.

[0039] (2) Optimize the hydraulic circuit: Optimize the design of the hydraulic system's pipelines, valves, etc., reduce unnecessary bends and throttling ports, reduce the resistance to hydraulic oil flow, and improve the system's response speed. For example, use large-diameter pipelines and high-performance directional valves to enable hydraulic oil to flow more smoothly to the actuator 100.

[0040] (3) Improve the structure of the coal discharge port: Design a reasonable shape and size of the coal discharge port so that the coal can flow out more smoothly. For example, by increasing the cross-sectional area of ​​the coal discharge port and optimizing the angle of the coal discharge port, the blockage and accumulation of coal at the coal discharge port can be reduced and the coal discharge speed can be accelerated.

[0041] The relevant embodiments shorten the action time of the coal feeding mechanism by increasing the fluid supply flow and optimizing the pipeline. On the one hand, this will increase the equipment investment cost, and on the other hand, it will reduce the system stability. High-pressure, high-flow hydraulic systems are prone to large pressure fluctuations and impacts, as well as overload of hydraulic components and mismatch of control systems.

[0042] This embodiment utilizes the replenishment of liquid in the accumulator 21 to solve the core problem of slow coal release caused by hydraulic pressure loss. At the same time, compared with the measures in related embodiments, it can also save equipment investment, improve the compatibility of the original system, ensure high system reliability, and thus significantly improve the production efficiency of the top coal caving face.

[0043] The fluid supply unit 1 is used to provide pressurized oil to the actuators 100 (such as jacks, cylinders, etc.) of the coal discharge mechanism in the coal discharge support. The specific type of the fluid supply unit 1 can be set according to actual needs and is not limited thereto. Based on the distributed fluid supply concept, the fluid supply unit 1 can provide pressurized oil to the actuators 100 of multiple coal discharge mechanisms. In addition, each coal discharge mechanism is equipped with at least one corresponding first energy storage unit 2 and second energy storage unit 3.

[0044] The first energy storage unit 2 and the second energy storage unit 3 are used to supply pressurized oil to the hydraulic chambers (rod chamber and rodless chamber) of the actuator 100. Due to the existence of very few oil passages, the first energy storage unit 2 and the second energy storage unit 3 can achieve rapid oil supply to the hydraulic chambers of the actuator 100 compared with the oil supply unit 1, thereby increasing the operating speed of the coal discharge mechanism and shortening the operating time.

[0045] The accumulator 21 is used to quickly supply hydraulic fluid to the hydraulic chamber of the actuator 100 using stored oil. The specific type of accumulator 21 can be set according to actual needs and is not limited thereto. For example, the accumulator 21 can be a bladder accumulator 21 or a piston accumulator 21, preferably a piston accumulator 21, which can be installed near the coal discharge mechanism.

[0046] like Figure 1 As shown, in some embodiments, the drive system further includes: a first valve body 4, the first end of which is connected to the supply end of the liquid supply unit 1, the second end of which is connected to the return end of the liquid supply unit 1, the third end of which is connected to the rodless cavity of the actuator 100, and the fourth end of which is connected to the rod cavity of the actuator 100. The liquid exchange end of the accumulator 21 in the first energy storage unit 2 is located between the third end of the first valve body 4 and the rodless cavity of the actuator 100, and the liquid exchange end of the accumulator 21 in the second energy storage unit 3 is located between the fourth end of the first valve body 4 and the rod cavity of the actuator 100. When the first and third ends of the first valve body 4 are connected and the second and fourth ends are connected, the accumulator 21 in the first energy storage unit 2 and the liquid supply unit 1 are used to supply liquid to the rodless cavity of the actuator 100. Liquid supply is performed, and after the liquid supply to the rodless chamber of the actuator 100 is completed, the liquid supply unit 1 is used to supply liquid to the accumulator 21 in the first energy storage unit 2; when the first end and the fourth end of the first valve body 4 are connected and the second end and the third end are connected, the accumulator 21 in the second energy storage unit 3 and the liquid supply unit 1 are used to supply liquid to the rod chamber of the actuator 100, and after the liquid supply to the rod chamber of the actuator 100 is completed, the liquid supply unit 1 is used to supply liquid to the accumulator 21 in the second energy storage unit 3.

[0047] It is understandable that, since the first end of the first valve body 4 is connected to the supply end of the liquid supply unit 1, the second end of the first valve body 4 is connected to the return end of the liquid supply unit 1, the third end of the first valve body 4 is connected to the rodless cavity of the actuator 100, and the fourth end of the first valve body 4 is connected to the rod cavity of the actuator 100, when the first and third ends of the first valve body 4 are connected and the second and fourth ends are connected, the accumulator 21 in the first energy storage unit 2 and the liquid supply unit 1 can simultaneously supply liquid to the rodless cavity of the actuator 100, thereby realizing the rapid action of the actuator 100. Furthermore, after the liquid supply to the rodless cavity of the actuator 100 is completed, the supply... Liquid unit 1 can also supply liquid to accumulator 21 in first energy storage unit 2, thereby ensuring a stable subsequent liquid supply to accumulator 21 in first energy storage unit 2. When the first end and the fourth end of the first valve body 4 are connected and the second end and the third end are connected, accumulator 21 in second energy storage unit 3 and liquid supply unit 1 can simultaneously supply liquid to rod chamber of actuator 100, thereby realizing rapid action of actuator 100. After the rod chamber of actuator 100 is supplied with liquid, liquid supply unit 1 can also supply liquid to accumulator 21 in second energy storage unit 3, thereby ensuring a stable subsequent liquid supply to accumulator 21 in second energy storage unit 3.

[0048] It should be noted that the first valve body 4 has at least three states: the first and third ends of the first valve body 4 are connected and the second and fourth ends are connected; the first and fourth ends of the first valve body 4 are connected and the second and third ends are connected; and the first and second ends of the first valve body 4 are connected, while the other passages are disconnected. Using the first valve body 4, the liquid supply passage of the liquid supply unit 1 can be switched, i.e., the rodless chamber of the actuator 100 supplies liquid and the rod chamber returns liquid to achieve the piston rod extension action of the actuator 100; and the rodless chamber of the actuator 100 returns liquid and the rod chamber supplies liquid to achieve the piston rod retraction action of the actuator 100. The specific type of the first valve body 4 can be set according to actual needs and is not limited thereto. For example, the first valve body 4 can be a three-position four-way electro-hydraulic directional valve.

[0049] like Figure 1As shown, in some embodiments, the first energy storage unit 2 and the second energy storage unit 3 further include: a second valve body 22, the first end of the second valve body 22 being connected to the liquid exchange end of the accumulator 21, the first end and the second end of the second valve body 22 in the first energy storage unit 2 being connected to the third end of the first valve body 4 respectively, and the third end of the second valve body 22 in the first energy storage unit 2 being connected to the rodless cavity of the actuator 100, the first end and the second end of the second valve body 22 in the second energy storage unit 3 being connected to the fourth end of the first valve body 4 respectively, and the third end of the second valve body 22 in the second energy storage unit 3 being connected to the rod cavity of the actuator 100. Specifically, when the first and third ends of the first valve body 4 are connected and the second and fourth ends are connected, the first and third ends of the second valve body 22 in the first energy storage unit 2 are connected, and the second and third ends of the second valve body 22 in the second energy storage unit 3 are connected; and when the first and fourth ends of the first valve body 4 are connected and the second and third ends are connected, the second and third ends of the second valve body 22 in the first energy storage unit 2 are connected, and the first and third ends of the second valve body 22 in the second energy storage unit 3 are connected.

[0050] It is understandable that when the first and third ends of the first valve body 4 are connected and the second and fourth ends are connected, and the first and third ends of the second valve body 22 in the first energy storage unit 2 are connected, and the second and third ends of the second valve body 22 in the second energy storage unit 3 are connected, the accumulator 21 and the liquid supply unit 1 in the first energy storage unit 2 can simultaneously supply liquid to the rodless chamber of the actuator 100, and the rod chamber of the actuator 100 can return liquid to the liquid supply unit 1, thereby realizing the rapid action of the actuator 100. After the rodless chamber of the actuator 100 is supplied with liquid, the liquid supply unit 1 can also supply liquid to the accumulator 21 in the first energy storage unit 2, thereby ensuring the subsequent stable liquid supply to the accumulator 21 in the first energy storage unit 2.

[0051] When the first and fourth ends of the first valve body 4 are connected and the second and third ends are connected, and the second and third ends of the second valve body 22 in the first energy storage unit 2 are connected, and the first and third ends of the second valve body 22 in the second energy storage unit 3 are connected, the accumulator 21 and the liquid supply unit 1 in the second energy storage unit 3 can simultaneously supply liquid to the rod chamber of the actuator 100, and the rodless chamber of the actuator 100 can return liquid to the liquid supply unit 1, thereby realizing the rapid action of the actuator 100. After the liquid supply to the rod chamber of the actuator 100 is completed, the liquid supply unit 1 can also supply liquid to the accumulator 21 in the second energy storage unit 3, thereby ensuring the subsequent stable liquid supply to the accumulator 21 in the second energy storage unit 3.

[0052] It should be noted that the second valve body 22 has at least three states: the first and third ends of the second valve body 22 are connected; the second and third ends of the second valve body 22 are connected; and all passages of the second valve body 22 are disconnected. Using the second valve body 22, in conjunction with the first valve body 4, the liquid supply passages of the liquid supply unit 1 can be switched. Specifically, the rodless chamber of the actuator 100 is supplied with liquid while the rod chamber returns liquid, thereby extending the piston rod of the actuator 100; and the rodless chamber of the actuator 100 returns liquid while the rod chamber is supplied with liquid, thereby retracting the piston rod of the actuator 100. The specific type of the second valve body 22 can be set according to actual needs and is not limited thereto. For example, the first valve body 4 can be a two-position three-way mode switching valve.

[0053] like Figure 1 As shown, in some embodiments, the first energy storage unit 2 and the second energy storage unit 3 each further include: a third valve body 23, the second end of which is connected to the first end of the second valve body 22 and the liquid exchange end of the accumulator 21, respectively; the first end of the third valve body 23 in the first energy storage unit 2 is connected to the third end of the first valve body 4; and the first end of the third valve body 23 in the second energy storage unit 3 is connected to the fourth end of the first valve body 4. Specifically, when the first and third ends of the first valve body 4 are connected and the second and fourth ends are connected, the first and second ends of the third valve body 23 in the first energy storage unit 2 are connected, and the first and second ends of the third valve body 23 in the second energy storage unit 3 are disconnected; and when the first and fourth ends of the first valve body 4 are connected and the second and third ends are connected, the first and second ends of the third valve body 23 in the first energy storage unit 2 are disconnected, and the first and second ends of the third valve body 23 in the second energy storage unit 3 are connected.

[0054] It is understandable that when the first and third ends of the first valve body 4 are connected and the second and fourth ends are connected, and the first and second ends of the third valve body 23 in the first energy storage unit 2 are connected, and the first and second ends of the third valve body 23 in the second energy storage unit 3 are disconnected, the accumulator 21 and the liquid supply unit 1 in the first energy storage unit 2 can simultaneously supply liquid to the rodless chamber of the actuator 100, and the rod chamber of the actuator 100 can return liquid to the liquid supply unit 1, thereby realizing the rapid action of the actuator 100. After the liquid supply to the rodless chamber of the actuator 100 is completed, the liquid supply unit 1 can also supply liquid to the accumulator 21 in the first energy storage unit 2, thereby ensuring the subsequent stable liquid supply to the accumulator 21 in the first energy storage unit 2.

[0055] When the first and fourth ends of the first valve body 4 are connected and the second and third ends are connected, and the first and second ends of the third valve body 23 in the first energy storage unit 2 are disconnected, and the first and second ends of the third valve body 23 in the second energy storage unit 3 are connected, the accumulator 21 and the liquid supply unit 1 in the second energy storage unit 3 can simultaneously supply liquid to the rod chamber of the actuator 100, and the rodless chamber of the actuator 100 can return liquid to the liquid supply unit 1, thereby realizing the rapid action of the actuator 100. After the liquid supply to the rod chamber of the actuator 100 is completed, the liquid supply unit 1 can also supply liquid to the accumulator 21 in the second energy storage unit 3, thereby ensuring the subsequent stable liquid supply to the accumulator 21 in the second energy storage unit 3.

[0056] It should be noted that the third valve body 23 has at least two states: the first and second ends of the third valve body 23 are connected, and the first and second ends of the third valve body 23 are disconnected. Using the third valve body 23, the entry and exit points of the passage containing the accumulator 21 can be realized. The specific type of the third valve body 23 can be set according to actual needs and is not limited thereto. For example, the third valve body 23 can be a switching valve.

[0057] like Figure 1 As shown, in some embodiments, the first energy storage unit 2 and the second energy storage unit 3 each further include a pressure detection unit 24. The detection end of the pressure detection unit 24 is located at the liquid exchange end of the accumulator 21, and the pressure detection unit 24 is used to detect the pressure at the liquid exchange end of the accumulator 21. When the pressure at the liquid exchange end of the accumulator 21 exceeds a first preset pressure, the first end and the second end of the third valve body 23 are disconnected, so that the liquid supply unit 1 stops supplying liquid to the accumulator 21.

[0058] It is understandable that since the detection end of the pressure detection unit 24 is located at the liquid exchange end of the accumulator 21, the pressure detection unit 24 can detect the pressure at the liquid exchange end of the accumulator 21. Based on this, when the pressure at the liquid exchange end of the accumulator 21 exceeds the first preset pressure, the first end and the second end of the third valve body 23 are disconnected, thereby completing the liquid storage of the accumulator 21 and ensuring the subsequent stable liquid supply of the accumulator 21.

[0059] It should be noted that the pressure detection unit 24 is used to detect the pressure at the liquid exchange end of the accumulator 21. The specific type of the pressure detection unit 24 can be set according to actual needs and there is no limitation thereto. For example, the pressure detection unit 24 can be a pressure sensor.

[0060] like Figure 1As shown, in some embodiments, the drive system further includes a hydraulic lock 5, the first end of which is connected to the third end of the second valve body 22 in the first energy storage unit 2, and the second end of the hydraulic lock 5 is connected to the third end of the second valve body 22 in the second energy storage unit 3. The third end of the hydraulic lock 5 is connected to the rodless cavity of the actuator 100, and the fourth end of the hydraulic lock 5 is connected to the rod cavity of the actuator 100. Specifically, when the first and third ends of the first valve body 4 are connected and the second and fourth ends are connected, or when the first and fourth ends of the first valve body 4 are connected and the second and third ends are connected, the first and third ends of the hydraulic lock 5 are also connected.

[0061] Understandably, when the first and third ends of the first valve body 4 are connected and the second and fourth ends are connected, or when the first and fourth ends of the first valve body 4 are connected and the second and third ends are connected, the actuator 100 is in a fluid supply state, and the first and third ends of the hydraulic lock 5 are connected and the second and fourth ends are connected, thereby ensuring the stable operation of the actuator 100. When the first and second ends of the first valve body 4 are disconnected from the third and fourth ends respectively, the actuator 100 stops supplying fluid, and the first and third ends of the hydraulic lock 5 are connected and the second and fourth ends are disconnected, thereby avoiding problems such as malfunction of the actuator 100.

[0062] It should be noted that when high-pressure oil is supplied to the first or second end of the hydraulic lock 5, that is, when the fluid supply unit 1 supplies fluid, the first and fourth ends of the hydraulic lock 5 are connected and the second and third ends are connected. When high-pressure oil is not supplied to the first or second end of the hydraulic lock 5, that is, when the fluid supply unit 1 stops supplying fluid, the first and fourth ends of the hydraulic lock 5 are disconnected and the second and third ends are disconnected.

[0063] The specific type of hydraulic lock 5 can be set according to actual needs, and there are no restrictions on it.

[0064] When the piston rod of the actuator 100 needs to extend, the first and third ends of the first valve body 4 are connected, and the second and fourth ends are connected. Similarly, the first and third ends of the second valve body 22 in the first energy storage unit 2 are connected, the first and second ends of the third valve body 23 in the first energy storage unit 2 are connected, the second and third ends of the second valve body 22 in the second energy storage unit 3 are connected, and the first and second ends of the third valve body 23 in the second energy storage unit 3 are disconnected. This allows the accumulator 21 and the liquid supply unit 1 in the first energy storage unit 2 to simultaneously supply liquid to the actuator. Liquid is supplied to the rodless chamber of the actuator 100. The piston rod of the actuator 100 extends until it is fully extended. Then, the first and third ends of the second valve body 22 in the first energy storage unit 2 and the second and third ends of the second valve body 22 in the second energy storage unit 3 are disconnected. The liquid supply unit 1 supplies liquid to the accumulator 21 in the first energy storage unit 2 until the pressure at the liquid exchange end of the accumulator 21 exceeds the first preset pressure. Then, the first and second ends of the third valve body 23 in the first energy storage unit 2 are disconnected, and the first valve body 4 is in the neutral disconnected state.

[0065] When the piston rod of the actuator 100 needs to retract, the first and fourth ends of the first valve body 4 are connected, and the second and third ends are connected. Similarly, the second and third ends of the second valve body 22 in the first energy storage unit 2 are connected, while the first and second ends of the third valve body 23 in the first energy storage unit 2 are disconnected. The first and third ends of the second valve body 22 in the second energy storage unit 3 are connected, and the first and second ends of the third valve body 23 in the second energy storage unit 3 are connected. This allows the accumulator 21 and the liquid supply unit 1 in the second energy storage unit 3 to simultaneously supply liquid to the actuator. Liquid is supplied to the rod chamber of the actuator 100, and the piston rod of the actuator 100 retracts until the piston rod of the actuator 100 retracts to its position. Then, the first and third ends of the second valve body 22 in the first energy storage unit 2 and the second and third ends of the second valve body 22 in the second energy storage unit 3 are disconnected. The liquid supply unit 1 supplies liquid to the accumulator 21 in the second energy storage unit 3 until the pressure at the liquid exchange end of the accumulator 21 exceeds the first preset pressure. Then, the first and second ends of the third valve body 23 in the second energy storage unit 3 are disconnected, and the first valve body 4 is in the neutral disconnected state.

[0066] like Figure 1 As shown, in some embodiments, the liquid supply unit 1 includes a hydraulic pump 11 and a drive motor 12. The liquid supply end of the hydraulic pump 11 is connected to the first end of the first valve body 4, and the liquid return end of the hydraulic pump 11 is connected to the second end of the first valve body 4. The power output end of the drive motor 12 is connected to the power input end of the hydraulic pump 11.

[0067] It is understandable that, since the supply end of the hydraulic pump 11 is connected to the first end of the first valve body 4, and the return end of the hydraulic pump 11 is connected to the second end of the first valve body 4, and the power output end of the drive motor 12 is connected to the power input end of the hydraulic pump 11, the hydraulic pump 11 can pump oil under the drive of the drive motor 12, thereby allowing the first end of the first valve body 4 to receive liquid and the second end to receive liquid, and thus, with the cooperation of various devices, the stable drive of the actuator 100 is ensured.

[0068] It should be noted that the hydraulic pump 11 is used to pump oil under the drive of the drive motor 12. The specific type of hydraulic pump 11 can be set according to actual needs and there is no limitation. For example, the hydraulic pump 11 can be a high-speed high-pressure hydraulic pump 11.

[0069] The drive motor 12 is used to drive the hydraulic pump 11. The specific type of the drive motor 12 can be set according to actual needs and is not limited thereto. For example, the drive motor 12 can be a high power density permanent magnet synchronous motor.

[0070] like Figure 1 As shown, in some embodiments, the liquid supply unit 1 further includes a displacement detection unit 13 and a control module 14. The displacement detection unit 13 is used to detect the displacement of the piston rod in the actuator 100. The signal input terminal of the control module 14 is connected to the signal output terminal of the displacement detection unit 13, and the signal output terminal of the control module 14 is connected to the signal input terminal of the drive motor 12. The control module 14 is used to control the switching and speed of the drive motor 12 according to the displacement of the piston rod in the actuator 100.

[0071] It is understandable that, since the signal input terminal of the control module 14 is connected to the signal output terminal of the displacement detection unit 13, and the signal output terminal of the control module 14 is connected to the signal input terminal of the drive motor 12, the control module 14 can use the displacement detection unit 13 to detect the displacement of the piston rod in the actuator 100, and control the switching and speed of the drive motor 12 according to the displacement of the piston rod in the actuator 100, thereby realizing the precise action of the actuator 100, and thus ensuring the efficient and safe operation of the coal feeding mechanism.

[0072] It should be noted that the displacement detection unit 13 is used to detect the displacement of the piston rod in the actuator 100. The specific type of the displacement detection unit 13 can be set according to actual needs and there is no limitation thereto. For example, the displacement detection unit 13 can be a displacement sensor.

[0073] The control module 14 is used to control the switching and speed of the drive motor 12, and can also control the conduction state of the first valve body 4, the second valve body 22, the third valve body 23, etc. The specific type of the control module 14 can be set according to actual needs and there is no limitation thereto. For example, the control module 14 can be a controller, which can use a driver to control the drive motor 12.

[0074] like Figure 1 As shown, in some embodiments, the liquid supply unit 1 further includes a safety valve 15, the first end of which is connected to the liquid supply end of the hydraulic pump 11, and the second end of which is connected to the liquid return end of the hydraulic pump 11. When the pressure at the liquid supply end of the hydraulic pump 11 exceeds the second preset pressure, the first end and the second end of the safety valve 15 are connected.

[0075] It is understandable that, since the first end of the safety valve 15 is connected to the supply end of the hydraulic pump 11 and the second end of the safety valve 15 is connected to the return end of the hydraulic pump 11, when the pressure at the supply end of the hydraulic pump 11 exceeds the second preset pressure, the first and second ends of the safety valve 15 are connected, thereby enabling the pressure relief at the supply end of the hydraulic pump 11 and ensuring that the supply unit 1 has a stable supply pressure.

[0076] It should be noted that the safety valve 15 is used to stabilize the pressure at the supply end of the hydraulic pump 11. The specific type of the safety valve 15 can be set according to actual needs, and there are no restrictions on it.

[0077] like Figure 1 As shown, in some embodiments, the fluid supply unit 1 further includes: an oil tank 16, a first check valve 17, and a second check valve 18. The fluid exchange end of the oil tank 16 is connected to the fluid supply end and the fluid return end of the hydraulic pump 11, respectively. The first check valve 17 is disposed between the fluid exchange end of the oil tank 16 and the fluid supply end of the hydraulic pump 11, and the inlet end of the first check valve 17 is connected to the fluid exchange end of the oil tank 16, and the outlet end of the first check valve 17 is connected to the fluid supply end of the hydraulic pump 11. The second check valve 18 is disposed between the fluid exchange end of the oil tank 16 and the fluid return end of the hydraulic pump 11, and the inlet end of the second check valve 18 is connected to the fluid return end of the hydraulic pump 11, and the outlet end of the second check valve 18 is connected to the fluid exchange end of the oil tank 16.

[0078] It is understandable that, since the fluid exchange end of the oil tank 16 is connected to the fluid supply end and the fluid return end of the hydraulic pump 11 respectively, and the first check valve 17 is located between the fluid exchange end of the oil tank 16 and the fluid supply end of the hydraulic pump 11, and the second check valve 18 is located between the fluid exchange end of the oil tank 16 and the fluid return end of the hydraulic pump 11, the oil tank 16 can replenish the hydraulic pump 11, thereby ensuring a stable fluid supply from the hydraulic pump 11 to the actuator 100.

[0079] It should be noted that the oil tank 16 is used to store oil and replenish the hydraulic pump 11. The specific type of oil tank 16 can be set according to actual needs and there are no restrictions on it.

[0080] The first check valve 17 and the second check valve 18 are used for one-way flow of the oil circuit to ensure that the oil tank 16 replenishes the hydraulic pump 11 while preventing the backflow of oil. The specific types of the first check valve 17 and the second check valve 18 can be set according to actual needs and there are no restrictions on them.

[0081] In the description of this disclosure, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0082] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0084] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A drive system for a coal feeding mechanism, characterized in that, include: Liquid supply unit, first energy storage unit, and second energy storage unit; The first energy storage unit and the second energy storage unit each include an accumulator. The liquid exchange end of the accumulator in the first energy storage unit is connected to the rodless cavity of the actuator in the coal discharge mechanism, and the liquid exchange end of the accumulator in the second energy storage unit is connected to the rod cavity of the actuator. Wherein, when the liquid supply end of the liquid supply unit is connected to the rodless cavity of the actuator, and the liquid return end of the liquid supply unit is connected to the rod cavity of the actuator, the accumulator and the liquid supply unit in the first energy storage unit are used to supply liquid to the rodless cavity of the actuator; When the liquid supply end of the liquid supply unit is connected to the rod cavity of the actuator, and the liquid return end of the liquid supply unit is connected to the rodless cavity of the actuator, the accumulator and the liquid supply unit in the second energy storage unit are used to supply liquid to the rod cavity of the actuator. The drive system further includes: a first valve body, a first end of which is connected to the supply end of the liquid supply unit, a second end of which is connected to the return end of the liquid supply unit, a third end of which is connected to the rodless chamber of the actuator, and a fourth end of which is connected to the rod chamber of the actuator; wherein, the liquid exchange end of the accumulator in the first energy storage unit is located between the third end of the first valve body and the rodless chamber of the actuator, and the liquid exchange end of the accumulator in the second energy storage unit is located between the fourth end of the first valve body and the rod chamber of the actuator; when the first valve body When the first and third ends of the first valve body are connected and the second and fourth ends are connected, the accumulator and the liquid supply unit in the first energy storage unit are used to supply liquid to the rodless chamber of the actuator, and after the liquid supply to the rodless chamber of the actuator is completed, the liquid supply unit is used to supply liquid to the accumulator in the first energy storage unit; when the first and fourth ends of the first valve body are connected and the second and third ends are connected, the accumulator and the liquid supply unit in the second energy storage unit are used to supply liquid to the rod chamber of the actuator, and after the liquid supply to the rod chamber of the actuator is completed, the liquid supply unit is used to supply liquid to the accumulator in the second energy storage unit; The first energy storage unit and the second energy storage unit each further include: a second valve body, the first end of which is connected to the liquid exchange end of the accumulator; the first end and the second end of the second valve body in the first energy storage unit are respectively connected to the third end of the first valve body, and the third end of the second valve body in the first energy storage unit is connected to the rodless cavity of the actuator; the first end and the second end of the second valve body in the second energy storage unit are respectively connected to the fourth end of the first valve body, and the third end of the second valve body in the second energy storage unit is connected to the rod cavity of the actuator; wherein, when the first end and the third end of the first valve body are connected and the second end and the fourth end are connected, the first end and the third end of the second valve body in the first energy storage unit are connected, and the second end and the third end of the second valve body in the second energy storage unit are connected; and when the first end and the fourth end of the first valve body are connected and the second end and the third end are connected, the second end and the third end of the second valve body in the first energy storage unit are connected, and the first end and the third end of the second valve body in the second energy storage unit are connected. The drive system further includes: a hydraulic lock, the first end of which is connected to the third end of the second valve body in the first energy storage unit, and the second end of which is connected to the third end of the second valve body in the second energy storage unit; the third end of which is connected to the rodless cavity of the actuator; and the fourth end of which is connected to the rod cavity of the actuator; wherein, when the first and third ends of the first valve body are connected and the second and fourth ends are connected, or when the first and fourth ends of the first valve body are connected and the second and third ends are connected, the first and third ends of the hydraulic lock are connected and the second and fourth ends are connected.

2. The drive system of the coal feeding mechanism according to claim 1, characterized in that, The first energy storage unit and the second energy storage unit each further include: The third valve body, the second end of which is connected to the first end of the second valve body and the liquid exchange end of the accumulator respectively; The first end of the third valve body in the first energy storage unit is connected to the third end of the first valve body, and the first end of the third valve body in the second energy storage unit is connected to the fourth end of the first valve body; Specifically, when the first and third ends of the first valve body are connected and the second and fourth ends are connected, the first and second ends of the third valve body in the first energy storage unit are connected, and the first and second ends of the third valve body in the second energy storage unit are disconnected; and when the first and fourth ends of the first valve body are connected and the second and third ends are connected, the first and second ends of the third valve body in the first energy storage unit are disconnected, and the first and second ends of the third valve body in the second energy storage unit are connected.

3. The drive system of the coal feeding mechanism according to claim 2, characterized in that, The first energy storage unit and the second energy storage unit each further include: A pressure detection unit, wherein the detection end of the pressure detection unit is disposed at the liquid exchange end of the accumulator, and the pressure detection unit is used to detect the pressure at the liquid exchange end of the accumulator; When the pressure at the liquid exchange end of the accumulator exceeds the first preset pressure, the first and second ends of the third valve body are disconnected, so that the liquid supply unit stops supplying liquid to the accumulator.

4. The drive system of the coal feeding mechanism according to claim 1, characterized in that, The liquid supply unit includes: A hydraulic pump, wherein the supply end of the hydraulic pump is connected to the first end of the first valve body, and the return end of the hydraulic pump is connected to the second end of the first valve body; A drive motor is provided, the power output end of which is connected to the power input end of the hydraulic pump.

5. The drive system of the coal feeding mechanism according to claim 4, characterized in that, The liquid supply unit also includes: A displacement detection unit is used to detect the displacement of the piston rod in the actuator. The control module has its signal input terminal connected to the signal output terminal of the displacement detection unit, and its signal output terminal connected to the signal input terminal of the drive motor. The control module is used to control the switching and rotation speed of the drive motor according to the displacement of the piston rod in the actuator.

6. The drive system of the coal feeding mechanism according to claim 4, characterized in that, The liquid supply unit also includes: A safety valve is provided, with its first end connected to the supply end of the hydraulic pump and its second end connected to the return end of the hydraulic pump. When the pressure at the supply end of the hydraulic pump exceeds a second preset pressure, the first and second ends of the safety valve are connected.

7. The drive system of the coal feeding mechanism according to claim 4, characterized in that, The liquid supply unit also includes: The oil tank has its fluid exchange end connected to the fluid supply end and the fluid return end of the hydraulic pump, respectively. A first check valve is disposed between the fluid exchange end of the oil tank and the fluid supply end of the hydraulic pump, and the inlet end of the first check valve is connected to the fluid exchange end of the oil tank, and the outlet end of the first check valve is connected to the fluid supply end of the hydraulic pump. The second check valve is located between the fluid exchange end of the oil tank and the return end of the hydraulic pump, with the inlet end of the second check valve connected to the return end of the hydraulic pump and the outlet end of the second check valve connected to the fluid exchange end of the oil tank.

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