Coal machine cooling water recovery anti-blocking power-off protection device

Abstract

The present application belongs to the technical field of fully mechanized coal mining face coal mining machine, and specifically discloses a coal machine cooling water recovery anti-blocking power-off protection device, which comprises a recovery assembly arranged on a coal mining machine body, wherein the coal mining machine body is provided with an inlet pipe, a backwater pipe is arranged in the recovery assembly, and the backwater pipe is connected in communication with the inlet pipe through the recovery assembly; the recovery assembly comprises a protection box arranged on the outer wall of the coal mining machine body, and the inlet pipe and the backwater pipe are both inserted into the protection box; and a variable-diameter pipeline is arranged at the connection position of the inlet pipe and the backwater pipe. The cooling water can be recycled and reused, direct discharge of water and coal slime and roadway accumulated water can be avoided, the moisture content of raw coal can be reduced, the coal quality and sales price can be improved, the labor cleaning cost can be reduced, and the anti-blocking and power-off protection linkage is achieved; the first pressure sensor is used for real-time detection of resistance, and the machine is automatically powered off and stopped when blocked, so that the electrical equipment is prevented from being damaged due to insufficient cooling, and the equipment is protected and the production safety is ensured.

Description

Technical Field

[0001] This invention belongs to the technical field of coal mining machines in fully mechanized mining faces, and specifically relates to a coal mining machine cooling water recovery anti-blockage and power failure protection device. Background Technology

[0002] The cooling water for the coal mining machine in the fully mechanized longwall face is drawn from the underground water supply system. After being circulated by the motor cooling system, it is directly discharged into the working face and enters the raw coal system. The cooling water mixes with the coal slurry in the working face to form a water-coal slurry, which requires a lot of manpower to clean. Furthermore, due to the unevenness of the rubber and auxiliary roadways in the working face, the cooling water is often not completely drained, resulting in water accumulation in the rubber and auxiliary roadways and poor on-site production. More seriously, it affects the normal production progress, the coal quality, and consequently the coal sales price. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a coal mining machine cooling water recovery anti-blockage and power failure protection device.

[0004] To achieve the above objectives, the present invention provides a coal mining machine cooling water recovery anti-blockage and power failure protection device, including a recovery component installed on the coal mining machine body, an inlet pipe installed on the coal mining machine body, a return water pipe installed inside the recovery component, and the return water pipe being connected to the inlet pipe through the recovery component; The recovery assembly includes a protective box installed on the outer wall of the coal mining machine, with both the inlet pipe and the return pipe inserted into the protective box. A reducing pipe is installed at the connection between the inlet pipe and the return pipe. A first pressure sensor is installed on the outer wall of the return pipe, and a pressure recognition mechanism is also installed on the outer wall of the return pipe. An electric bidirectional valve is installed on the inlet pipe. A controller is installed inside the protective box, and the controller is electrically connected to the pressure recognition mechanism, the first pressure sensor, the electric bidirectional valve, and the coal mining machine body.

[0005] In the above technical solution, the inner diameter of the return water pipe is smaller than the inner diameter of the inlet pipe.

[0006] In the above technical solution, the ends of the return water pipe and the inlet pipe are connected to external water pipes, and the external water pipes connecting the return water pipe and the inlet pipe are fixed together with the cable connecting the coal mining machine body by cable clamps.

[0007] In the above technical solution, a pressure relief pipe is further provided on one of the connecting ends of the electric bidirectional valve, and the pressure relief pipe is inserted and extends to the outside of the protective box.

[0008] In the above technical solution, the variable diameter pipe further includes a narrowing section and a guiding section connected to each other. The narrowing section and the guiding section are both configured as a conical cylindrical structure and are arranged opposite to each other.

[0009] In the above technical solution, a filter cartridge adapted to the shape of the narrowing section is further provided inside the narrowing section.

[0010] In the above technical solution, a guide head is further provided at one end of the filter cartridge, and the guide head is configured with a conical structure.

[0011] In the above technical solution, the pressure recognition mechanism further includes a connecting cylinder disposed on the return water pipe, an installation cylinder connected to the connecting cylinder, a top rod slidably inserted inside the installation cylinder, a first spring sleeved on the top rod, and the other end of the first spring disposed on the installation cylinder, a piston component disposed at one end of the top rod, and the piston component slidably installed inside the connecting cylinder, an electric push rod disposed inside the connecting cylinder, a movable rod disposed at the output end of the electric push rod, and the movable rod being inserted into and slidably installed with the top rod, and a second pressure sensor disposed inside the installation cylinder, and a linkage plate disposed between the sensing end of the second pressure sensor and the top rod.

[0012] In the above technical solution, the movable rod further includes a first insert rod disposed on the output end of the electric push rod, a second insert rod slidably sleeved on the outer wall of the first insert rod, a second spring sleeved on the second insert rod, and the other end of the second spring disposed on the electric push rod.

[0013] In operation, this technical solution delivers cooling water to the coal mining machine via the inlet pipe. After cooling, the water smoothly transitions to the return water pipe via the narrowing and guiding sections of the variable-diameter pipe. The filter cartridge filters out hard impurities in the water, protecting precision components. The return water pipe recycles the cooling water to the lower roadway water basin, preventing direct discharge that could lead to coal slurry and roadway water accumulation, thus reducing the moisture content of the raw coal and improving coal quality. When the return water pipe becomes blocked due to bends, impurity accumulation, or other reasons, the first pressure sensor detects excessive resistance, and the controller immediately shuts down the coal mining machine by cutting off power. Simultaneously, it switches the electric bidirectional valve to connect the inlet pipe and the pressure relief pipe for timely pressure relief. The pressure recognition mechanism, through the coordination of piston components, springs, and pressure sensors, distinguishes between blockages and unstable water supply, preventing accidental shutdowns. After maintenance, resetting the electric bidirectional valve and the pressure recognition mechanism restores the cooling water recovery operation.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This solution enables the recycling and reuse of cooling water, avoiding direct discharge that leads to coal slurry and water accumulation in roadways, reducing the moisture content of raw coal, improving coal quality and sales price, and reducing labor cleaning costs. This solution features a linkage between anti-blockage and power-off protection. The first pressure sensor detects resistance in real time, and automatically cuts off power and stops the machine when blockage occurs, preventing damage to electrical equipment due to insufficient cooling and ensuring equipment integrity and production safety. This solution features a timely and reliable pressure relief function. In case of blockage, the electric two-way valve switches to the pressure relief circuit to quickly discharge cooling water and prevent the pipeline from rupturing due to excessive pressure. This solution protects precision components through filtration. The filter cartridge filters out hard impurities, preventing scratches on pressure sensors and control mechanisms and extending the service life of the equipment. This solution has a low rate of false shutdowns. The pressure identification mechanism, through its elastic structure and dual pressure detection, accurately distinguishes between blockages and unstable water supply, ensuring continuous production. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure proposed in this invention; Figure 2 This is a schematic diagram of the internal structure of the protective box proposed in this invention; Figure 3 This is a schematic diagram of the recycling component structure proposed in this invention; Figure 4 This is a schematic diagram of the internal structure of the variable diameter pipe proposed in this invention; Figure 5 This is a schematic diagram of the pressure identification mechanism proposed in this invention; Figure 6 This is a schematic diagram of the movable rod structure proposed in this invention.

[0016] In the diagram: 1. Coal mining machine body; 2. Inlet pipe; 3. Recovery assembly; 31. Protective box; 32. First pressure sensor; 33. Variable diameter pipe; 331. Narrowing section; 332. Guide section; 333. Filter cartridge; 334. Guide head; 34. Electric two-way valve; 35. Pressure recognition mechanism; 351. Connecting cylinder; 352. Mounting cylinder; 353. Piston; 354. Top rod; 355. First spring; 356. Electric push rod; 357. Movable rod; 3571. First insertion rod; 3572. Second spring; 3573. Second insertion rod; 358. Second pressure sensor; 359. Linkage plate; 36. Controller; 4. Return water pipe; 5. Pressure relief pipe. Detailed Implementation

[0017] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Example Please refer to the following: Figures 1 to 6This embodiment provides a coal mining machine cooling water recovery anti-blocking power failure protection device, which is applied to the cooling water treatment scenario of coal mining machines in fully mechanized mining faces. It solves the problems of direct discharge of cooling water from existing coal mining machines, which forms coal-water slurry, causes water accumulation in the roadway, and easily damages electrical equipment and affects coal quality when blocked. Through the integrated design of recovery, anti-blocking, power failure protection and pressure relief, it achieves efficient recovery of cooling water, accurate detection of blockage, equipment safety protection and coal quality improvement, and ensures continuous production. The device includes a coal mining machine body 1, an inlet pipe 2, a recovery component 3, a return water pipe 4, and a pressure relief pipe 5. The inlet pipe 2 transports cooling water, the recovery component 3 realizes cooling water recovery and anti-clogging detection, the return water pipe 4 guides the recovered water flow, and the pressure relief pipe 5 responds to the pressure relief needs when there is a blockage. The multiple components work together to ensure the circulation of cooling water and the safety of the equipment. Specifically, the coal mining machine body 1 is the core equipment for coal mining operations. A protective box 31 for the recovery component 3 is fixedly installed on its outer wall. The protective box 31 is a closed structure that provides protection for the internal components, preventing erosion by underground dust and coal slag, and ensuring the stability of the detection and control mechanism. The inlet pipe 2 and the return water pipe 4 are both inserted into the protective box 31 and connected by a reducing pipe 33. The inlet pipe 2 is drawn from the underground water supply system to provide cooling water for the coal mining machine body 1. The return water pipe 4 recovers the cooled water flow and guides it to the nearest water pit in the lower roadway for discharge, avoiding direct discharge that could form coal slurry and water accumulation in the roadway. The inner diameter of the return water pipe 4 is smaller than that of the inlet pipe 2. The smaller inner diameter design gives the return water pipe 4 stronger bending resistance, greater flexibility, and reduces the risk of blockage caused by pipe bending. At the same time, the water pressure is more stable, which is conducive to the long-term stable operation of the pressure detection element. Both the return water pipe 4 and the inlet pipe 2 are connected to external water pipes. The external water pipes connecting the two are fixed to the cable connecting the coal mining machine body 1 using the same cable clamp, avoiding tangling and wear caused by messy pipe and cable arrangement, and improving the safety and cleanliness of underground operations. The reducing pipe 33 includes a narrowing section 331 and a guiding section 332 connected to each other. Both are designed as conical cylindrical structures and are arranged opposite each other. The narrowing section 331 connects to the inlet pipe 2, and the guiding section 332 connects to the return water pipe 4. The conical structure can smoothly guide water. The water flow transitions from the large-diameter inlet pipe 2 to the small-diameter return pipe 4, avoiding pressure surges caused by water flow impact and improving the smoothness of water recovery. A filter cartridge 333 adapted to its own shape is installed inside the narrow section 331. One end of the filter cartridge 333 is equipped with a conical guide head 334, which guides the water flow smoothly into the filter cartridge. The filter cartridge 333 is used to filter hard impurities in the cooling water, preventing impurities from scratching precision components such as the first pressure sensor 32 and the pressure recognition mechanism 35, thus extending the service life of the equipment. The recovery assembly 3 also includes a first pressure sensor 32 and a pressure recognition mechanism 35 installed on the outer wall of the return water pipe 4, and an electric bidirectional valve 34 installed on the inlet pipe 2. A controller 36 is fixedly installed inside the protective box 31. The controller 36 is electrically connected to the pressure recognition mechanism 35, the first pressure sensor 32, the electric bidirectional valve 34, and the coal mining machine body 1 to form an automatic control loop. The first pressure sensor 32 is used to detect the water flow resistance in the return water pipe 4. When the resistance reaches the set threshold, it is judged that the pipe is blocked or the return water is not smooth. The controller 36 immediately sends a signal to automatically cut off the power to the coal mining machine body 1 to stop the machine, so as to avoid damage to the electrical equipment due to insufficient cooling and rapid temperature rise, and to ensure the integrity of the equipment. At the same time, the controller 36 controls the electric bidirectional valve 34 to switch the connection state, so that the inlet pipe 2 is connected to the pressure relief pipe 5. The pressure relief pipe 5 is inserted and extends to the outside of the protective box 31 to discharge the cooling water nearby and relieve pressure in time, so as to avoid the pipe rupture caused by excessive pressure in the inlet pipe 2. The pressure identification mechanism 35 is used to distinguish between pressure changes caused by pipe blockage and unstable water supply to avoid accidental shutdown. It includes a connecting cylinder 351 fixedly mounted on the return water pipe 4, which is internally connected to the return water pipe 4. An installation cylinder 352 is connected to the connecting cylinder 351, and a push rod 354 is slidably inserted into the installation cylinder 352. A first spring 355 is sleeved on the push rod 354, and the other end of the first spring 355 is fixed to the installation cylinder 352. A piston 353 is fixedly mounted on one end of the push rod 354. 53 is slidably installed inside the connecting cylinder 351 and can move up and down with changes in water pressure; an electric push rod 356 is fixedly installed inside the connecting cylinder 351, and a movable rod 357 is provided at the output end of the electric push rod 356. The movable rod 357 is inserted into the top rod 354 and slidably adapted. A second pressure sensor 358 is also provided inside the mounting cylinder 352. A linkage plate 359 is provided between the sensing end of the second pressure sensor 358 and the top rod 354. When the top rod 354 moves, the second pressure sensor 358 is triggered through the linkage plate 359. The movable rod 357 includes a first insert rod 3571 and a second insert rod 3573. The first insert rod 3571 is fixed to the output end of the electric push rod 356. The second insert rod 3573 is slidably sleeved on the outer wall of the first insert rod 3571. A second spring 3572 is also sleeved on the outside of the second insert rod 3573. The other end of the second spring 3572 is fixed to the electric push rod 356, forming an elastic telescopic structure. When the water pressure changes, the piston 353 overcomes the resistance of the first spring 355 and moves upward, triggering the second spring 3573 through the push rod 354 and the linkage plate 359. After receiving the signal from the two pressure sensors 358 and the controller 36, the controller controls the electric push rod 356 to drive the movable rod 357 to move downward and press against the top rod 354. If the pressure change is due to frequent fluctuations caused by unstable water supply, the movable rod 357 with its elastic structure will adaptively extend and retract with the up and down movement of the piston 353, which can avoid continuously triggering the shutdown signal. If the stable high pressure is caused by pipeline blockage, the movable rod 357 will continuously press against the top rod 354. After the controller 36 confirms the blockage, it will immediately perform power-off and pressure relief operations, effectively reducing accidental shutdowns and ensuring production continuity.

[0019] To better understand this solution, the specific implementation process is given below: In actual coal mining operations, after cooling water is delivered to the coal mining machine body 1 via inlet pipe 2 and cooled, it smoothly transitions to return water pipe 4 via the narrowing section 331 and guide section 332 of the reducing pipe 33. The filter cartridge 333 filters hard impurities in the water, protecting precision components. Return water pipe 4 recovers the cooling water to the lower roadway water basin, avoiding direct discharge that could form coal slurry and roadway water accumulation, reducing the moisture content of raw coal and improving coal quality. When return water pipe 4 becomes blocked due to bends, impurity accumulation, etc., the first pressure sensor 32 detects excessive resistance, and the controller 36 immediately controls the coal mining machine body 1 to shut down. At the same time, the electric two-way valve 34 is switched to connect inlet pipe 2 and pressure relief pipe 5 for timely pressure relief. The pressure recognition mechanism 35, through the cooperation of piston, spring and pressure sensor, distinguishes between blockage and unstable water supply, avoiding accidental shutdown. After maintenance, the electric two-way valve 34 and pressure recognition mechanism 35 are reset to resume cooling water recovery operations.

[0020] The coal mining machine cooling water recovery anti-blockage power failure protection device in this embodiment has the following beneficial effects: This solution enables the recycling and reuse of cooling water, avoiding direct discharge that leads to coal slurry and water accumulation in roadways, reducing the moisture content of raw coal, improving coal quality and sales price, and reducing labor cleaning costs. This solution features a linkage between anti-blockage and power-off protection. The first pressure sensor 32 detects resistance in real time, and automatically cuts off power and stops the machine when blockage occurs, preventing damage to electrical equipment due to insufficient cooling and ensuring equipment integrity and production safety. The pressure relief function of this solution is timely and reliable. In case of blockage, the electric two-way valve 34 switches to the pressure relief circuit to quickly discharge cooling water and prevent the pipeline from rupturing due to excessive pressure. This solution protects precision components through filtration. The 333 filter cartridge filters out hard impurities, preventing scratches on pressure sensors and control mechanisms and extending the service life of the equipment. This solution has a low rate of false shutdowns. The pressure identification mechanism 35, through its elastic structure and dual pressure detection, accurately distinguishes between blockages and unstable water supply, ensuring continuous production.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A coal mining machine cooling water recovery anti-clogging power failure protection device, characterized in that, It includes a recovery component (3) installed on the body (1) of the coal mining machine, an inlet pipe (2) is installed on the body (1), a return water pipe (4) is installed inside the recovery component (3), and the return water pipe (4) is connected to the inlet pipe (2) through the recovery component (3); The recovery component (3) includes a protective box (31) installed on the outer wall of the coal mining machine body (1), and the inlet pipe (2) and the return water pipe (4) are both inserted into the protective box (31). A variable diameter pipe (33) is provided at the connection between the inlet pipe (2) and the return water pipe (4). A first pressure sensor (32) is provided on the outer wall of the return water pipe (4). A pressure recognition mechanism (35) is also provided on the outer wall of the return water pipe (4). An electric two-way valve (34) is provided on the inlet pipe (2). A controller (36) is provided in the protective box (31), and the controller (36) is electrically connected to the pressure recognition mechanism (35), the first pressure sensor (32), the electric two-way valve (34), and the coal mining machine body (1).

2. The coal mining machine cooling water recovery anti-blockage power failure protection device according to claim 1, characterized in that, The inner diameter of the return pipe (4) is smaller than the inner diameter of the inlet pipe (2).

3. The coal mining machine cooling water recovery anti-blockage power failure protection device according to claim 1, characterized in that, The ends of the return water pipe (4) and the inlet pipe (2) are connected to external water pipes, and the external water pipes connecting the return water pipe (4) and the inlet pipe (2) are fixed together with the cable connecting the coal mining machine body (1) by cable clamps.

4. The coal mining machine cooling water recovery anti-blockage power failure protection device according to claim 1, characterized in that, The electric two-way valve (34) has a pressure relief pipe (5) on one of its connecting ends, and the pressure relief pipe (5) is inserted and extends to the outside of the protective box (31).

5. The coal mining machine cooling water recovery anti-blockage power failure protection device according to claim 1, characterized in that, The variable diameter pipe (33) includes a narrowing section (331) and a guiding section (332) connected to each other. Both the narrowing section (331) and the guiding section (332) are configured as conical cylindrical structures and are arranged opposite to each other.

6. The coal mining machine cooling water recovery anti-blockage power failure protection device according to claim 5, characterized in that, The narrowing section (331) is also provided with a filter cartridge (333) that is adapted to the shape of the narrowing section (331).

7. The coal mining machine cooling water recovery anti-blockage power failure protection device according to claim 6, characterized in that, The filter cartridge (333) is provided with a guide head (334) at one end, and the guide head (334) is configured as a cone shape.

8. The coal mining machine cooling water recovery anti-blockage power failure protection device according to claim 1, characterized in that, The pressure recognition mechanism (35) includes a connecting cylinder (351) disposed on the return water pipe (4), a mounting cylinder (352) connected to the connecting cylinder (351), a push rod (354) slidably inserted inside the mounting cylinder (352), a first spring (355) sleeved on the push rod (354), and the other end of the first spring (355) disposed on the mounting cylinder (352). A piston (353) is disposed at one end of the push rod (354), and the piston ( 353) Slidingly installed in the connecting cylinder (351), the connecting cylinder (351) is provided with an electric push rod (356), the output end of the electric push rod (356) is provided with a movable rod (357), and the movable rod (357) is inserted into the top rod (354) and slidably installed. The mounting cylinder (352) is also provided with a second pressure sensor (358), and a linkage plate (359) is provided between the sensing end of the second pressure sensor (358) and the top rod (354).

9. A coal mining machine cooling water recovery anti-blockage power failure protection device according to claim 8, characterized in that, The movable rod (357) includes a first insert rod (3571) disposed on the output end of the electric push rod (356), a second insert rod (3573) is slidably sleeved on the outer wall of the first insert rod (3571), a second spring (3572) is sleeved on the second insert rod (3573), and the other end of the second spring (3572) is disposed on the electric push rod (356).

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