Fire prevention device for mine belt conveyor in coal mine

Abstract

This utility model discloses a fire prevention device for a mine belt conveyor in underground coal mines, including a support frame and a belt conveyor mounted on the support frame. One end of the belt conveyor is fixedly connected to a drive motor, which is also fixedly mounted on the support frame. The belt conveyor includes two rollers rotatably connected to the support frame, with a conveyor belt drivingly connecting the two rollers. A water spraying device is installed on the inner side of the conveyor belt, and is fixedly connected to the support frame via a connecting plate. This device is used to spray water onto the conveyor belt and rollers for cooling. The water spraying device includes a water spray pipe and a collection device. This utility model uses a first and second water spray nozzle on the water spray pipe to precisely spray water onto the inner side of the conveyor belt and the outer side of the rollers, directly reducing the temperature of the contact surfaces, ensuring that frictional heat generation is controlled within a safe threshold, reducing the probability of open flame generation, and preventing safety accidents.

Description

Technical fields:

[0001] This utility model relates to the field of underground fire prevention technology, specifically to a fire prevention device for mining belt conveyors in coal mines. Background technology:

[0002] In underground coal mine safety production, belt conveyors are the core equipment for coal transportation. However, they have long faced a major safety hazard of fire caused by frictional heat generation: frictional heat generation between the conveyor belt and rollers: the underground environment is humid and dusty. When the conveyor belt and rollers operate at high speed for a long time, the friction coefficient of the contact surface increases, which can easily generate high-temperature hot spots. When the temperature reaches the ignition point of coal (about 300-500℃) or the ignition point of conveyor belt rubber (about 350℃), it may cause open flames and safety accidents. Utility model content:

[0003] Therefore, this utility model provides a fire prevention device for underground belt conveyors in coal mines to overcome the problems of the prior art.

[0004] This utility model is implemented by the following technical solution:

[0005] A fire prevention device for a mine belt conveyor in underground coal mines includes a support frame and a belt conveyor mounted on the support frame. One end of the belt conveyor is fixedly connected to a drive motor, which is also fixedly mounted on the support frame. The belt conveyor includes two rollers rotatably connected to the support frame, and a conveyor belt is driven between the two rollers. A water spraying device is installed inside the conveyor belt, and is fixedly connected to the support frame via a connecting plate. This device is used to spray water to cool the conveyor belt and rollers. The water spraying device includes a spray pipe and a collection device. The spray pipe is located near the outer side of the rollers and the inner side of the conveyor belt, and both ends are fixedly connected to the support frame via connecting plates. A collection device is installed at the lower end. The spray pipe has a first spray nozzle facing the inner side of the conveyor belt and a second spray nozzle facing the outer side of the rollers. The collection device includes a collection trough, and a second conduit connected to an external wastewater treatment device is fixedly connected to the side of the collection trough.

[0006] Preferably, the water spraying device further includes a pressurized water injection device, which includes a first conduit, one end of which is fixedly connected to the water spraying pipe, and the input end is connected to a water inlet device. A pressurized pump is also provided on the first conduit.

[0007] Preferably, the collection trough is disposed inside the conveyor belt and fixedly connected to the support frame, and the bottom surface of the collection trough is an inclined slope, which is inclined towards the connection of the second guide tube.

[0008] Preferably, one end of the water spray pipe is fixedly connected to the pressurized water injection device, and the other end is closed.

[0009] Preferably, a protective component is provided on the top of the conveyor belt. The protective component is installed on the top side of the support frame and includes a baffle hinged to the top side of the support frame. The baffle is inclined and its bottom is in contact with the top of the conveyor belt. An elastic element is connected between the side of the baffle and the side of the support frame.

[0010] Preferably, the elastic element is an angle spring, and both ends of the angle spring are fixedly connected to the baffle and the support frame respectively, so that the baffle is kept in contact with the top of the conveyor belt by the elastic force.

[0011] The advantages of this utility model are: by setting the first and second water spray nozzles of the water spray pipe to accurately spray water on the inner side of the conveyor belt and the outer side of the roller, the temperature of the contact surface is directly reduced, ensuring that the frictional heat generation is controlled within the safe threshold, reducing the probability of open flame generation, and preventing safety accidents. Attached image description:

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure described in this utility model;

[0014] Figure 2 This is a top view schematic diagram of the structure described in this utility model;

[0015] Figure 3 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0016] Figure 4 This is a side sectional view of the structure described in this utility model.

[0017] In the diagram: 1. Belt conveyor; 2. Support frame; 3. Drive motor; 4. Water spray pipe; 5. First water spray nozzle; 6. Second water spray nozzle; 7. First guide pipe; 8. Collection tank; 9. Second guide pipe; 10. Baffle; 11. Angle spring. Detailed implementation method:

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the fire prevention device for the mine belt conveyor in the coal mine has a support frame 2 fixed to the foundation of the underground roadway by anchor bolts, which carries the belt conveyor 1 and auxiliary equipment. The two rollers of the belt conveyor 1 are rotatably connected to both ends of the support frame 2 through bearing seats. The conveyor belt is tensioned and sleeved on the two rollers. The drive motor 3 is connected to the shaft of the drive roller through a coupling and is controlled by an explosion-proof electrical control box.

[0020] A water spraying device is installed on the inner side of the conveyor belt. The water spraying device is fixedly connected to the support frame 2 through a connecting plate, and the water spraying device can spray water to cool the conveyor belt and rollers respectively.

[0021] The water spraying device includes a water spray pipe 4 installed inside the conveyor belt, a collection device, and a pressurized water injection device. The water spray pipe 4 is located close to the outer side of the roller and the inner side of the conveyor belt. Both ends of the water spray pipe 4 are fixedly connected to the support frame 2 through connecting plates. One end is fixedly connected to the pressurized water injection device, and the other end is closed. A collection device is installed at the lower end of the water spray pipe 4. The collection device is located inside the conveyor belt and is fixedly connected to the support frame 2. The pressurized water injection device can make the output end of the water spray pipe 4 spray water towards the outer side of the roller and the inner side of the conveyor belt for cooling. The collection device can collect the water flowing down from the outer side of the roller and the inner side of the conveyor belt.

[0022] Multiple first water nozzles 5 and second water nozzles 6 are fixed sequentially on the water spray pipe 4. The first water nozzles 5 are inclined towards the inner side of the conveyor belt, and the second water nozzles 6 are directed towards the outer side of the roller.

[0023] The pressurized water injection device includes a first conduit 7, which is fixedly connected to one end of a spray pipe 4, and a water inlet device is connected to the input end of the first conduit 7. A pressurized pump is fixed on the first conduit 7.

[0024] The collection device includes a collection tank 8, and multiple second conduits 9 are fixedly connected to the side of the collection tank 8. The second conduits 9 are connected to an external wastewater treatment device. The bottom surface of the collection tank 8 is set with an incline and is inclined towards the connection of the second conduits 9. In this way, the water flowing down from the outer side of the roller and the inner side of the conveyor belt can be transported to the wastewater treatment device for purification. The treated clean water is returned to the pressurized water injection system for reuse.

[0025] A protective component is also installed on the top of the conveyor belt. The protective component is installed on the top side of the support frame 2. The protective component can prevent coal from entering between the roller and the support frame 2 during the conveying process.

[0026] The protective assembly includes a baffle 10 hinged to the top side of the support frame 2, with the baffle 10 inclined. The bottom of the baffle 10 is fitted against the top of the conveyor belt, and an angle spring 11 is fixed between the side of the baffle 10 and the side of the support frame 2, maintaining a constant pressure against the top of the conveyor belt to form a continuous sealing barrier. When coal blocks on the conveyor belt move below the baffle 10, the inclined baffle guides the coal blocks to slide down the slope, preventing them from entering the gap between the roller and the support frame 2. If the conveyor belt fluctuates due to load changes, the elastic deformation of the angle spring 11 allows the baffle 10 to rise and fall synchronously, maintaining the fitted state.

[0027] Actual work process:

[0028] When the drive motor 3 drives the conveyor belt to run, the pressurization pump starts synchronously. High-pressure water flows through the first conduit 7 into the water spray pipe 4. The first water spray nozzle 5 sprays atomized water onto the inner side of the conveyor belt, reducing the friction coefficient of the contact area between the conveyor belt and the roller and suppressing heat generation. The second water spray nozzle 6 directly washes the roller surface, carrying away the heat generated by the bearing operation and the friction of the conveyor belt, so that the temperature of key components is maintained below 60°C, which is lower than the safe threshold of coal ignition point.

[0029] Wastewater recycling: The cooled dusty water flows into the collection tank 8 along the inner surface of the conveyor belt and the outer surface of the rollers, and is collected by the inclined surface to the second conduit 9, and then transported to the wastewater treatment device for purification. The treated clean water is returned to the pressurized water injection system for reuse.

[0030] Under the elastic force of the angle spring 11, the baffle 10 always maintains a constant pressure against the top of the conveyor belt, forming a continuous sealed barrier. When coal blocks on the conveyor belt move to below the baffle 10, the inclined baffle guides the coal blocks to slide down the slope, preventing them from entering the gap between the roller and the support frame 2. If the conveyor belt fluctuates up and down due to load changes, the elastic deformation of the angle spring 11 allows the baffle 10 to rise and fall synchronously, maintaining the contact state and effectively preventing coal particles from entering the dangerous area.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fire prevention device for a mine belt conveyor in underground coal mines, comprising a support frame (2) and a belt conveyor (1) mounted on the support frame (2), wherein a drive motor (3) is fixedly connected to one end of the belt conveyor (1), the drive motor (3) is fixedly mounted on the support frame (2), the belt conveyor (1) includes two rollers rotatably connected to the support frame (2), and a conveyor belt is driven between the two rollers, characterized in that, A water spraying device is provided on the inner side of the conveyor belt. The water spraying device is fixedly connected to the support frame (2) through a connecting plate and is used to spray water to cool the conveyor belt and rollers. The water spraying device includes a water spraying pipe (4) and a collection device. The water spraying pipe (4) is located near the outer side of the rollers and the inner side of the conveyor belt. Both ends are fixedly connected to the support frame (2) through connecting plates. A collection device is provided at the lower end. The water spraying pipe (4) is provided with a first water spray nozzle (5) facing the inner side of the conveyor belt and a second water spray nozzle (6) facing the outer side of the rollers. The collection device includes a collection trough (8). A second conduit (9) connected to an external wastewater treatment device is fixedly connected to the side of the collection trough (8).

2. The fire prevention device for underground coal mine belt conveyors according to claim 1, characterized in that: The water spraying device also includes a pressurized water injection device, which includes a first conduit (7), one end of which is fixedly connected to the water spray pipe (4), the input end of which is connected to the water inlet device, and a pressurized pump is provided on the first conduit (7).

3. The fire prevention device for underground coal mine belt conveyors according to claim 2, characterized in that: The collection trough (8) is located inside the conveyor belt and is fixedly connected to the support frame (2). The bottom surface of the collection trough (8) is an inclined slope, and the slope is inclined towards the connection of the second guide tube (9).

4. The fire prevention device for underground coal mine belt conveyors according to claim 3, characterized in that: One end of the water spray pipe (4) is fixedly connected to the pressurized water injection device, and the other end is closed.

5. The fire prevention device for underground coal mine belt conveyors according to claim 4, characterized in that: The top of the conveyor belt is provided with a protective component, which is installed on the top side of the support frame (2) and includes a baffle (10) hinged to the top side of the support frame (2). The baffle (10) is inclined and its bottom is in contact with the top of the conveyor belt. An elastic element is connected between the side of the baffle (10) and the side of the support frame (2).

6. The fire prevention device for underground coal mine belt conveyors according to claim 5, characterized in that: The elastic element is an angle spring (11), and the two ends of the angle spring (11) are fixedly connected to the baffle (10) and the support frame (2) respectively, so that the baffle (10) is kept in contact with the top of the conveyor belt by elastic force.

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