A coal mine tunneling supporting device

Abstract

The utility model relates to the technical field of coal mine especially, is a kind of coal mine tunneling supporting device, including two slide rails, two the slide rails are slidably provided with base, two the base both ends are fixedly connected with hydraulic telescopic link, four the upper end fixedly connected with top support plate of hydraulic telescopic link, two the slide rails are all equidistantly provided with multiple positioning holes, multiple the positioning hole is sealed by sealing mechanism, the base is provided with threaded hole, the threaded hole is threadedly connected with bolt, the lower end fixedly connected with positioning column of bolt, the positioning column is inserted into positioning hole.

Description

Technical Field

[0001] This utility model relates to the field of coal mining technology, and in particular to a coal mine tunneling support device. Background Technology

[0002] Coal mine tunneling support systems are crucial equipment used during underground coal mine tunneling operations to support the roof, sides, and floor of roadways and prevent surrounding rock collapse. They withstand ground pressure, maintain roadway stability, and ensure the safety of the working space. Common types include bolted supports, cable anchors, metal supports, and hydraulic supports. They must be adaptable to different geological conditions and possess sufficient load-bearing capacity and reliability. They are essential for efficient and safe coal mine tunneling, directly impacting the safety of underground workers and tunneling efficiency.

[0003] When using hydraulic supports for support, as shown in patent publication date CN221169619U, entitled "A Coal Mine Tunneling Support Device," a device comprising multiple sets of bases and support plates, and positioning rails on both sides, is disclosed. A telescopic support rod connects the bases and support plates. The positioning rails have an I-shaped cross-section, and the bases and positioning rails are slidably connected. Both sides of the base are matched with the positioning rails, and both sides of the positioning rails have protrusions. The two end faces of the positioning rails are respectively provided with outer blocks and inner grooves. The outer blocks are matched with the inner grooves. The upper end face of the positioning rails has multiple recessed positioning holes along its length. Positioning bolts are used to reinforce the positioning rails as needed. Then, the positioning bolts are inserted into the holes to fix the base, thus completing the position adjustment.

[0004] In the positioning operation of support devices during coal mine tunneling, the underground environment is extremely complex, with high concentrations of coal dust and fine coal particles permeating the air without effective isolation or protection. The positioning holes originally used for inserting positioning bolts are exposed for a long time, and fine coal particles can easily enter with the airflow or deposit under gravity, gradually accumulating in the holes and forming blockages. This hinders the smooth insertion of the positioning bolts and affects the positioning of the support. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies where fine coal particles easily intrude with airflow or deposit under gravity, gradually accumulating in the holes and forming blockages that hinder the smooth insertion of positioning bolts. Therefore, this invention proposes a coal mine tunneling support device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A coal mine tunneling support device is designed, comprising two slide rails, each slide rail having a base slidably mounted thereon, and hydraulic telescopic rods fixedly connected to both ends of each base. A top support plate is fixedly connected to the upper ends of the four hydraulic telescopic rods. Multiple positioning holes are equally spaced on both slide rails, and these positioning holes are sealed by a sealing mechanism. Threaded holes are provided on the bases, and bolts are threaded into these holes. A positioning pin is fixedly connected to the lower end of each bolt and inserted into the positioning hole.

[0008] Preferably, side support plates are fixedly connected to both sides of the top support plate.

[0009] Preferably, the sealing mechanism includes a sealing ring that abuts against the inner wall of the positioning hole, and a connecting post is fixedly connected to the inner wall of the sealing ring. The lower end of the connecting post is reset by a reset mechanism.

[0010] Preferably, the upper end of the connecting column is flush with the slide rail.

[0011] Preferably, a spring is fixedly connected to the bottom wall of the positioning hole, and the upper end of the spring is fixedly connected to the connecting post.

[0012] Preferably, a positioning groove is provided at the lower end of the connecting column, and a positioning block is inserted into the positioning groove, and the positioning block is fixedly connected to the positioning hole.

[0013] Preferably, the spring is sleeved on the positioning block.

[0014] Preferably, both ends of the slide rail are provided with receiving cavities, and the bottom wall of the receiving cavity is provided with a placement hole.

[0015] The coal mine tunneling support device proposed in this utility model has the following advantages: by sealing the positioning hole through the sealing mechanism, coal dust can be effectively blocked from entering, the positioning hole can be avoided from being blocked, and the positioning function of the support device can be guaranteed to be stable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a coal mine tunneling support device proposed in this utility model;

[0017] Figure 2 This is a perspective view of a coal mine tunneling support device (bolt removal) proposed in this utility model;

[0018] Figure 3 This is a three-dimensional partial cross-sectional view of the slide rail of a coal mine tunneling support device proposed in this utility model;

[0019] Figure 4 This utility model proposes a coal mine tunneling support device. Figure 2 Enlarged view of part A in the middle.

[0020] In the diagram: 1. Top support plate; 2. Side support plate; 3. Hydraulic telescopic rod; 4. Base; 5. Slide rail; 6. Threaded hole; 7. Positioning pin; 8. Sealing ring; 9. Receiving cavity; 10. Connecting pin; 11. Placement hole; 12. Spring; 13. Positioning block; 14. Positioning hole; 15. Positioning groove; 16. Bolt. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Example 1: Refer to Figure 1-4 A coal mine tunneling support device includes two slide rails 5, each with a base 4 slidably mounted on it. Each slide rail 5 has a receiving cavity 9 at both ends, and a placement hole 11 is provided through the bottom wall of the receiving cavity 9. By placing a bolt in the receiving cavity 9, the bolt passes through the placement hole 11 and is threadedly connected to the floor plate in the tunnel, thus fixing the slide rail 5. The receiving cavity 9 can accommodate the bolt nut, preventing the nut from protruding from the surface of the slide rail 5, preventing the base 4 from getting stuck with the nut when sliding, and ensuring smooth movement of the base 4.

[0023] Hydraulic telescopic rods 3 are fixedly connected to both ends of the two bases 4. Top support plates 1 are fixedly connected to the upper ends of the four hydraulic telescopic rods 3. Multiple positioning holes 14 are evenly spaced on both slide rails 5. These positioning holes 14 are sealed by a sealing mechanism. Threaded holes 6 are provided on the bases 4, with bolts 16 threaded into them. Positioning pins 7 are fixedly connected to the lower ends of the bolts 16 and inserted into the positioning holes 14. When the position of the top support plate 1 needs to be changed, the bases 4 must slide on the slide rails 5. During this process, only the positioning holes 14 into which the positioning pins 7 are inserted are less prone to coal dust particles entering. The remaining unused positioning holes 14, due to long-term exposure, are prone to coal dust accumulation and blockage, thus affecting the smooth insertion of subsequent positioning pins 7. Therefore, sealing the positioning holes 14 through the sealing mechanism effectively prevents coal dust intrusion, avoids blockage of the positioning holes 14, and ensures the stable positioning function of the support device.

[0024] Example 2: Refer to Figure 1-2 As another preferred embodiment of the present invention, based on embodiment 1, side support plates 2 are fixedly connected to both sides of the top support plate 1, and the side support plates 2 play a protective role on the sides of the device.

[0025] Example 3: Reference Figure 1-4In another preferred embodiment of this utility model, based on embodiment 2, the sealing mechanism includes a sealing ring 8, which is a polyurethane wear-resistant sealing ring, resistant to coal dust abrasion and underground humid environment. The sealing ring 8 abuts against the inner wall of the positioning hole 14, and a connecting column 10 is fixedly connected to the inner wall of the sealing ring 8. The lower end of the connecting column 10 is reset by a reset mechanism. Through the cooperation of the sealing ring 8 and the connecting column 10, the positioning hole 14 can be effectively sealed, preventing coal dust particles from entering and avoiding blockage of the positioning hole 14. At the same time, during the tightening of the bolt 16, the positioning column 7 at the lower end of the bolt 16 will push the connecting column 10 downward, so that the positioning hole 14 opens automatically, ensuring that the positioning column 7 can be smoothly inserted without hindering the positioning operation of the support device.

[0026] The upper end of the connecting column 10 is flush with the slide rail 5, which prevents the upper end of the connecting column 10 from being exposed and affecting the movement of the base 4.

[0027] A spring 12 is fixedly connected to the bottom wall of the positioning hole 14. The spring 12 is made of stainless steel and has an anti-corrosion coating to extend the service life of the sealing components. The upper end of the spring 12 is fixedly connected to the connecting post 10. The spring 12 supports and resets the connecting post 10. When the positioning post 7 is disengaged from the positioning hole 14, the spring 12 will automatically reset the connecting post 10 by its own restoring force, so that the connecting post 10 and the sealing ring 8 can re-form a sealing fit, ensuring that the positioning hole 14 always remains sealed when not in use.

[0028] By pushing the base 4 to slide along the slide rail 5, the top support plate 1 and the side support plate 2 can be adjusted in position synchronously. When it is necessary to fix the support position, first insert the bolt 16 into the threaded hole 6 of the base 4. During the process of tightening the bolt 16 with a wrench, the bolt 16 will drive the lower positioning post 7 to move downward. When the positioning post 7 moves downward, it will push the connecting post 10 downward synchronously, so that the spring 12 is compressed until the positioning post 7 is fully inserted into the positioning hole 14, and finally the position of the base 4 is fixed to ensure the stability of the support structure.

[0029] Example 4: During the use of Example 3, when the screw 16 is screwed into the threaded hole 6, the screw 16 will drive the positioning pin 7 to rotate synchronously. Since the positioning pin 7 abuts against the upper end of the connecting pin 10, it will further drive the connecting pin 10 to rotate with it. This linked rotation will cause the spring 12 to twist and deform. Long-term use will easily cause fatigue damage to the spring 12, affecting its support and reset function for the connecting pin 10. Refer to Figure 1-4As another preferred embodiment of this utility model, based on embodiment 3, a positioning groove 15 is provided at the lower end of the connecting column 10, and a positioning block 13 is inserted into the positioning groove 15. The positioning block 13 is fixedly connected to the positioning hole 14, and the spring 12 is sleeved on the positioning block 13. By using the positioning groove 15 and the positioning block 13, the connecting column 10 is limited, preventing the connecting column 10 from rotating, thereby avoiding fatigue damage to the spring 12 caused by linkage torsion, and ensuring the long-term stability of the support and reset performance of the spring 12.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A coal mine tunneling support device, comprising two slide rails (5), characterized in that, Each of the two slide rails (5) is slidably provided with a base (4), and each of the two bases (4) is fixedly connected to a hydraulic telescopic rod (3). The upper ends of the four hydraulic telescopic rods (3) are fixedly connected to a top support plate (1). Multiple positioning holes (14) are equally spaced on each of the two slide rails (5). The multiple positioning holes (14) are sealed by a sealing mechanism. A threaded hole (6) is provided on the base (4). A bolt (16) is threaded into the threaded hole (6). A positioning pin (7) is fixedly connected to the lower end of the bolt (16). The positioning pin (7) is inserted into the positioning hole (14). The sealing mechanism includes a sealing ring (8), which abuts against the inner wall of the positioning hole (14). A connecting post (10) is fixedly connected to the inner wall of the sealing ring (8), and the lower end of the connecting post (10) is reset by a reset mechanism.

2. The coal mine tunneling support device according to claim 1, characterized in that, Both sides of the top support plate (1) are fixedly connected to side support plates (2).

3. The coal mine tunneling support device according to claim 1, characterized in that, The upper end of the connecting column (10) is flush with the slide rail (5).

4. A coal mine tunneling support device according to claim 1, characterized in that, A spring (12) is fixedly connected to the bottom wall of the positioning hole (14), and the upper end of the spring (12) is fixedly connected to the connecting column (10).

5. A coal mine tunneling support device according to claim 4, characterized in that, The lower end of the connecting column (10) is provided with a positioning groove (15), and a positioning block (13) is inserted into the positioning groove (15). The positioning block (13) is fixedly connected to the positioning hole (14).

6. A coal mine tunneling support device according to claim 5, characterized in that, The spring (12) is sleeved on the positioning block (13).

7. A coal mine tunneling support device according to claim 1, characterized in that, Both ends of the slide rail (5) are provided with receiving cavities (9), and the bottom wall of the receiving cavity (9) is provided with a placement hole (11).

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