Coal piling protection device

Abstract

The utility model relates to a coal piling protection device which is located above a coal bunker and comprises an installation base, a connecting rod and a swing rod, the installation base is connected with a roadway top plate through the connecting rod, the distance between the installation base and the roadway top plate is adjustable, a reed switch is fixedly arranged on the installation base, and the swing rod is located on the installation base in a sleeved mode and can swing in a reciprocating mode relative to the installation base. The reciprocating swinging direction of the swinging rod is parallel to the conveying direction of raw coal on the belt conveyor; the oscillating rod is arranged in the vertical direction, the first end of the oscillating rod is provided with a magnet corresponding to the reed switch, the second end of the oscillating rod serves as a free end, the joint of the oscillating rod and the mounting base serves as a fulcrum, and the weight from the fulcrum to the first end of the oscillating rod is smaller than that from the fulcrum to the second end of the oscillating rod. The technical problems that in the prior art, the height of a coal piling protection sensor cannot be adjusted, and misoperation is caused by inaccurate coal level detection of the coal piling protection sensor can be solved.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine equipment technology, specifically relating to a coal pile protection device. Background Technology

[0002] Belt conveyors play a crucial role in underground coal mine transportation. The coal mining environment is harsh, especially at the working face where intercalation with rock and debris is common. When a belt conveyor stops due to blockages caused by these contaminants, and workers fail to stop it promptly due to negligence, the conveyor head can become clogged with raw coal, leading to blockages, belt tearing, motor burnout, and even personal injury, posing a significant safety hazard to production. Coal pile protection devices are designed to automatically stop a belt conveyor when raw coal accumulates at its head. They are typically installed above the conveyor transfer point or coal storage bin. When coal accumulates at the transfer point or in a full bin, the conveyor automatically stops. However, existing coal pile protection devices have a fixed height, preventing the adjustment of the sensor height according to actual needs. Furthermore, when using carbon-electrode coal pile protection devices, the sensors frequently collide with large pieces of coal and gangue, causing them to adhere to other locations and malfunction, resulting in inaccurate coal level detection and severely impacting coal mine production. Utility Model Content

[0003] In view of the shortcomings of existing technologies, a coal pile protection device is proposed to solve the technical problems of existing technologies being unable to adjust the height of the coal pile protection sensor and the inaccurate detection of coal level by the coal pile protection sensor leading to malfunctions.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A coal stacking protection device, located above a coal bunker, includes a mounting base, a connecting rod, and a swing rod. The mounting base is connected to the roadway roof via the connecting rod, and the distance between the mounting base and the roadway roof is adjustable. A reed switch is fixed on the mounting base. The swing rod is sleeved on the mounting base and can swing back and forth relative to the mounting base. The direction of the swing rod's back and forth swing is parallel to the direction of raw coal conveying on the belt conveyor.

[0006] The swing rod is arranged vertically, with a magnet at its first end corresponding to the reed switch, and its second end serving as a free end. The connection point between the swing rod and the mounting base is used as the fulcrum, and the weight from the fulcrum to the first end of the swing rod is less than the weight from the fulcrum to the second end of the swing rod.

[0007] The technical solution is further configured such that a support rod is provided below the mounting base, and the swing rod is rotatably sleeved around the support rod.

[0008] The technical solution is further configured such that the swing rod is provided with a limiting through hole, the support rod is configured as a variable diameter structure, the large diameter end of the support rod is connected to the mounting base, and its small diameter end passes through the limiting through hole and is provided with a limiting block.

[0009] The technical solution is further configured such that a baffle is provided on the support rod, the baffle is located in front of the swing rod, and the front is the direction of the raw coal source on the belt conveyor.

[0010] The technical solution is further configured such that the baffle is an arc-shaped structure, and a wear-resistant layer is provided on the side of the baffle adjacent to the swing rod.

[0011] The technical solution is further configured such that the connecting rod is arranged in a vertical direction, and includes an inner connecting rod and an outer connecting rod that are nested together. Both the inner connecting rod and the outer connecting rod have a plurality of connecting through holes in the vertical direction, and a connecting member is provided in the connecting through holes.

[0012] The technical solution is further configured such that the mounting base is arranged in a horizontal direction, and includes an inner mounting base and an outer mounting base that are nested together. The outer mounting base is provided with a slide rail extending in a horizontal direction, and the inner mounting base is provided with a slider that can slide along the slide rail. A locking element is provided between the inner mounting base and the outer mounting base.

[0013] The technical solution is further configured such that the locking member is threadedly connected to the outer mounting base, the end of the locking member abuts against the inner mounting base, and a plurality of locking members are provided, and the plurality of locking members are symmetrically arranged.

[0014] The beneficial effects of this utility model are:

[0015] The height of the mounting base is adjusted by setting a connecting rod, thereby adjusting the height of the free end of the swing rod to detect different raw coal accumulation heights in the coal bunker, offering high flexibility. When a large piece of coal gangue collides with the free end of the swing rod, the swing rod tilts along the coal gangue conveying direction, causing the reed switch to separate from the magnet. As the coal gangue continues to be conveyed, it separates from the free end of the swing rod, the swing rod swings in the opposite direction and quickly resets under its own weight, and the reed switch and magnet move closer together again. The separation time between the reed switch and magnet is extremely short, avoiding malfunctions caused by coal gangue collisions, thus accurately detecting the coal level. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the coal pile protection device in an embodiment of this utility model;

[0017] Figure 2 yes Figure 1 Partial schematic diagram at point A in the middle;

[0018] Figure 3 This is a top view of the baffle in an embodiment of this utility model.

[0019] In the attached diagram: 1. Tunnel roof; 2. Inner connecting rod; 3. Outer connecting rod; 4. Connecting through hole; 5. Inner mounting base; 6. Outer mounting base; 7. Locking element; 8. Support rod; 9. Swing rod; 10. Reed switch; 11. Magnet; 12. Baffle; 13. Wear-resistant layer; 14. Limiting step; 15. Limiting block. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0021] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0022] According to an embodiment of this utility model, a coal pile protection device is provided. Please refer to [link / reference]. Figures 1 to 3 Located above the coal bunker, it includes a mounting base, a connecting rod, and a swing rod 9. The mounting base is connected to the roadway roof 1 via the connecting rod, and the distance between the mounting base and the roadway roof 1 is adjustable. A reed switch 10 is fixed on the mounting base. The swing rod 9 is sleeved on the mounting base and can swing back and forth relative to the mounting base. The direction of the swing rod 9 is parallel to the direction of raw coal conveying on the belt conveyor.

[0023] The swing rod 9 is arranged vertically, with a magnet 11 at its first end corresponding to the reed switch 10, and its second end serving as a free end. The connection point between the swing rod 9 and the mounting base serves as the fulcrum, and the weight from the fulcrum to the first end of the swing rod 9 is less than the weight from the fulcrum to the second end of the swing rod 9.

[0024] Specifically, the swing rod 9 acts as a lever structure, with the connection point between the swing rod 9 and the mounting base serving as the fulcrum. At the same time, the weight from the fulcrum to the first end of the swing rod 9 is less than the weight from the fulcrum to the second end of the swing rod 9. The second end of the swing rod 9 can tilt under the action of external force, and after the external force disappears, the swing rod 9 can return to its original position under its own gravity.

[0025] It should be noted that by setting a connecting rod, the height of the mounting base can be adjusted according to actual needs, thereby adjusting the height of the free end of the swing rod 9. This allows for the detection of different raw coal accumulation heights within the coal bunker, offering high flexibility. When a large piece of coal gangue collides with the free end of the swing rod 9, the free end of the swing rod 9 tilts along the coal gangue conveying direction under the pushing action of the coal gangue, causing the first end of the swing rod 9 to rotate in the opposite direction. The reed switch 10 separates from the magnet 11. As the coal gangue continues to be conveyed, it separates from the free end of the swing rod 9, and the swing rod 9 swings in the opposite direction and quickly resets under its own weight. The reed switch 10 and magnet 11 then move closer together again. The separation time between the reed switch 10 and magnet 11 is extremely short, avoiding malfunctions caused by coal gangue collisions and ensuring accurate coal level detection. Correspondingly, the operator pre-sets the shutdown response time of the belt conveyor, which is no less than the aforementioned brief separation time between the reed switch 10 and magnet 11.

[0026] When the coal bunker is full, the accumulated raw coal will push the free end of the swing rod 9 to tilt along the direction of raw coal conveying. The first end of the swing rod 9 will rotate in the opposite direction, causing the reed switch 10 to separate from the magnet 11 for a long time (the separation time exceeds the shutdown response time of the belt conveyor). The coal pile protection will be activated, and the belt conveyor will stop.

[0027] In the coal pile protection device of this embodiment, please refer to Figures 1 to 3 A support rod 8 is provided below the mounting base, and the swing rod 9 is rotatably sleeved around the support rod 8.

[0028] Specifically, the swing rod 9 is provided with a limiting through hole, the support rod 8 is configured as a variable diameter structure, the large diameter end of the support rod 8 is connected to the mounting base, and its small diameter end passes through the limiting through hole and is provided with a limiting block 15.

[0029] It should be noted that the diameter of the limiting through hole is larger than the diameter of the small diameter end of the support rod 8. Therefore, the swing rod 9 can swing relative to the small diameter end of the support rod 8. The diameter of the limiting through hole is smaller than the diameter of the large diameter end of the support rod 8, and a limiting step 14 is formed at the junction of the large diameter end of the support rod 8 and its small diameter end. The swing rod 9 is restricted between the limiting step 14 and the limiting block 15 to prevent the swing rod 9 from being displaced along the axial direction of the support rod 8 during the swing process, so as to affect the magnetic field applied by the magnet 11 to the reed switch 10.

[0030] In the coal pile protection device of this embodiment, please refer to Figures 1 to 3 A baffle 12 is provided on the support rod 8. The baffle 12 is located in front of the swing rod 9, and the front is the direction of the raw coal source on the belt conveyor.

[0031] It should be noted that under the action of external force (such as coal gangue or coal flow), the free end of the swing rod 9 swings along the direction of raw coal conveying. After the external force disappears, the free end of the swing rod 9 swings in the opposite direction. The baffle 12 hinders this reverse swing process to reduce the reverse swing amplitude of the free end of the swing rod 9, which helps the swing rod 9 to quickly return to its original position under its own weight.

[0032] Preferably, the baffle 12 is configured as an arc-shaped structure, and a wear-resistant layer 13 is provided on the side of the baffle 12 adjacent to the swing rod 9.

[0033] It should be noted that the arc-shaped structure can further prevent the swing rod 9 from displacing along the axial direction of the support rod 8 during the swinging process, ensuring that the swing rod 9 is accurately reset; the wear-resistant layer 13 is made of rubber wear-resistant layer, which can reduce the wear caused by the swing rod 9 directly contacting and colliding with the baffle 12 during the reverse swinging process.

[0034] In the coal pile protection device of this embodiment, please refer to Figures 1 to 3 The connecting rod is arranged vertically and includes an inner connecting rod 2 and an outer connecting rod 3 that are nested together. Both the inner connecting rod 2 and the outer connecting rod 3 have a plurality of connecting through holes 4 along the vertical direction, and a connecting member is provided in the connecting through hole 4.

[0035] It should be noted that the inner connecting rod 2 is connected to the tunnel roof 1, and the outer connecting rod 3 is connected to the mounting base. After adjusting the length of the inner connecting rod 2 inside the outer connecting rod 3, the connector is inserted into the connecting through hole 4, which can adjust the height of the mounting base. The connector is preferably a bolt, which is locked with a nut.

[0036] In the coal pile protection device of this embodiment, please refer to Figures 1 to 3 The mounting base is arranged horizontally and includes an inner mounting base 5 and an outer mounting base 6 that are nested together. The outer mounting base 6 is provided with a slide rail that extends horizontally, and the inner mounting base 5 is provided with a slider that can slide along the slide rail. A locking member 7 is provided between the inner mounting base 5 and the outer mounting base 6.

[0037] It should be noted that the support rod 8 and the reed switch 10 are both connected to the inner mounting base 5. Pulling the inner mounting base 5 can adjust the position of the swing rod 9 in the horizontal plane to detect the coal level at different positions inside the coal bunker. After the relative positions of the inner mounting base 5 and the outer mounting base 6 are fixed, they are locked with the locking piece 7.

[0038] In the coal pile protection device of this embodiment, please refer to Figures 1 to 3 The locking member 7 is threadedly connected to the outer mounting base 6, and the end of the locking member 7 abuts against the inner mounting base 5. Several locking members 7 are provided, and the several locking members 7 are symmetrically arranged.

[0039] It should be noted that when the locking element 7 is turned, a force is applied to the inner mounting base 5 by means of its end. The symmetrically arranged locking elements 7 apply forces in opposite directions to the inner mounting base 5, thereby improving the stability of the inner mounting base 5.

[0040] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A coal stack protection device, located above a coal bunker, characterized in that, It includes a mounting base, a connecting rod, and a swing rod. The mounting base is connected to the roadway roof through the connecting rod, and the distance between the mounting base and the roadway roof is adjustable. A reed switch is fixed on the mounting base. The swing rod is sleeved on the mounting base and can swing back and forth relative to the mounting base. The direction of the swing rod's back and forth swing is parallel to the direction of raw coal conveying on the belt conveyor. The swing rod is arranged vertically, with a magnet at its first end corresponding to the reed switch, and its second end serving as a free end. The connection point between the swing rod and the mounting base is used as the fulcrum, and the weight from the fulcrum to the first end of the swing rod is less than the weight from the fulcrum to the second end of the swing rod.

2. The coal pile protection device according to claim 1, characterized in that, A support rod is provided below the mounting base, and the swing rod is rotatably sleeved around the support rod.

3. The coal pile protection device according to claim 2, characterized in that, The swing rod is provided with a limiting through hole, the support rod is configured as a variable diameter structure, the large diameter end of the support rod is connected to the mounting base, and its small diameter end passes through the limiting through hole and is provided with a limiting block.

4. The coal pile protection device according to claim 2 or 3, characterized in that, A baffle is provided on the support rod, and the baffle is located in front of the swing rod, which is in the direction of the raw coal source on the belt conveyor.

5. The coal pile protection device according to claim 4, characterized in that, The baffle is configured with an arc-shaped structure, and a wear-resistant layer is provided on the side of the baffle adjacent to the swing rod.

6. The coal pile protection device according to claim 1, characterized in that, The connecting rod is arranged vertically and includes an inner connecting rod and an outer connecting rod that are nested together. Both the inner connecting rod and the outer connecting rod have several connecting through holes along the vertical direction, and connecting parts are provided in the connecting through holes.

7. The coal pile protection device according to claim 1, characterized in that, The mounting base is arranged horizontally and includes an inner mounting base and an outer mounting base that are nested together. The outer mounting base is provided with a slide rail that extends horizontally, and the inner mounting base is provided with a slider that can slide along the slide rail. A locking element is provided between the inner mounting base and the outer mounting base.

8. The coal pile protection device according to claim 7, characterized in that, The locking member is threadedly connected to the outer mounting base, and the end of the locking member abuts against the inner mounting base. Several locking members are provided, and the several locking members are symmetrically arranged.

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