A protective device for coal mine tunneling

Abstract

This utility model belongs to the field of mining technology, and in particular to a protective device for coal mine tunneling. It includes two anchor bolt tray limiting posts, each with an "L"-shaped adjusting rod inserted at its bottom end. A transverse adjusting sleeve is fitted onto the outer wall of the crossbar of each "L"-shaped adjusting rod. A connecting rod is fixedly connected to the opposite side of each of the two transverse adjusting sleeves. A positioning frame is installed at the bottom end of each connecting rod. The connecting rod and positioning frame serve as fixed nodes for positioning the anchor bolt tray limiting posts and the "L"-shaped adjusting rods. This allows the two anchor bolt tray limiting posts to be distributed on both sides of the anchor bolt tray to position it, restricting the anchor bolt tray from rotating with the anchor bolt, thus avoiding safety hazards caused by high-speed rotation of the anchor bolt tray. The vertical adjustment of the "L"-shaped adjusting rod and the anchor bolt tray limiting posts, combined with the horizontal adjustment of the "L"-shaped adjusting rod and the transverse adjusting sleeve, expands the applicability of the device.

Description

Technical Field

[0001] This utility model belongs to the field of mining technology, specifically relating to a protective device for coal mine tunneling. Background Technology

[0002] Anchor bolt reinforcement is an important protective method during coal mine tunneling. Anchor bolts are fixed to the protective netting on the roadway wall through anchor bolt trays.

[0003] In existing technologies, when using pneumatic or hydraulic anchor drilling rigs to install anchors in mine tunnels, the anchor tray rotates at high speed with the anchor. During the anchor installation phase, the high-speed rotating anchor tray can easily come into contact with the limbs of construction workers, causing mechanical injuries. When the anchor tray is close to the protective netting on the tunnel wall, there will be high-speed relative friction between the anchor tray and the metal protective netting, which may generate sparks and pose a safety hazard. Utility Model Content

[0004] This utility model provides a protective device for coal mine tunneling, which can restrict the anchor plate from rotating with the anchor bolt, thereby improving the safety of workers installing protective anchor bolts at the tunneling face.

[0005] This utility model provides the following technical solution: a protective device for coal mine tunneling, comprising two anchor bolt tray limiting posts, each anchor bolt tray limiting post having an "L"-shaped adjusting rod inserted into its bottom end, each "L"-shaped adjusting rod having a transverse adjusting sleeve fitted on its outer wall, each transverse adjusting sleeve having a connecting rod fixedly connected to its opposite side, and each connecting rod having a positioning frame installed at its bottom end.

[0006] The anchor bolt tray limiting post has an outer protective pad fixedly connected to its side wall, and a contraction cavity is formed inside the anchor bolt tray limiting post.

[0007] Both of the transverse adjustment sleeve sidewalls are threaded with fastening bolts, which penetrate the transverse adjustment sleeve sidewalls.

[0008] The top of the "L"-shaped adjusting rod is equipped with a top pressure spring, which is filled inside the contraction cavity.

[0009] The top of the "L"-shaped adjusting rod is fixedly connected to a limiting plate, which is slidably connected to the inner wall of the contraction cavity.

[0010] Each of the two connecting rods has an upper mounting sleeve fixedly connected to its bottom end, and a lower mounting sleeve fixedly connected to its bottom end. The upper mounting sleeve and the lower mounting sleeve are aligned and engaged with the outer wall of the positioning frame.

[0011] The positioning frame has a mounting ring fixedly connected to its bottom end, and the width of the positioning frame is greater than the diameter of the mounting ring.

[0012] The beneficial effects of this utility model are:

[0013] 1. Using connecting rods and positioning frames as fixed nodes to position the anchor tray limiting posts and "L"-shaped adjusting rods, the two anchor tray limiting posts can be distributed on both sides of the anchor tray to position the anchor tray, restricting the anchor tray from rotating with the anchor, thereby avoiding the safety hazards caused by the high-speed rotation of the anchor tray and improving the safety of workers installing protective anchors at the tunnel face.

[0014] 2. The vertical adjustment of the "L"-shaped adjusting rod and the anchor plate limiting post, along with the horizontal adjustment of the "L"-shaped adjusting rod and the horizontal adjusting sleeve, can adapt to anchor bolts and anchor plates of different sizes, thus expanding the applicability of the lifting device.

[0015] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the installation state of this utility model;

[0018] Figure 3 This is a cross-sectional view of the anchor plate limiting post in this utility model;

[0019] Figure 4 This is a schematic diagram of the lateral movement state of the "L"-shaped adjusting rod in this utility model.

[0020] In the diagram: 1. Anchor bolt tray limiting post; 11. Outer protective pad; 12. Contraction chamber; 2. "L" shaped adjusting rod; 21. Lateral adjusting sleeve; 211. Fastening bolt; 22. Top pressure spring; 23. Limiting plate; 3. Connecting rod; 31. Upper mounting sleeve; 32. Lower mounting sleeve; 4. Positioning frame; 41. Mounting ring. Detailed Implementation

[0021] Please see Figures 1-4 The present invention provides the following technical solution: a protective device for coal mine tunneling, comprising two anchor plate limiting posts 1, each anchor plate limiting post 1 having an "L" shaped adjusting rod 2 inserted into its bottom end, each "L" shaped adjusting rod 2 having a transverse adjusting sleeve 21 fitted on the outer wall of its crossbar, each transverse adjusting sleeve 21 having a connecting rod 3 fixedly connected to the opposite side of its opposite side, and each connecting rod 3 having a positioning frame 4 installed at its bottom end.

[0022] In this implementation plan: During the device assembly stage, when installing on a mining anchor drilling rig with an operating handle, the upper mounting sleeve 31 and the lower mounting sleeve 32 are directly fitted onto the appropriate position of the operating handle of the anchor drilling rig, and the upper mounting sleeve 31 and the lower mounting sleeve 32 are welded to the operating handle of the anchor drilling rig. When installing on a mining anchor drilling rig without an operating handle, a suitable mounting ring 41 is first selected and welded to the appropriate position on the outer wall of the mining anchor drilling rig. If there is a slight error between the ring diameter of the mounting ring 41 and the diameter of the mining anchor drilling rig, it can be compensated by filling with welding material. Then, the upper mounting sleeve 31 and the lower mounting sleeve 32 are fitted onto the outside of the positioning frame 4 and fixed by welding. After installation, the two anchor tray limiting posts 1 are respectively set on both sides.

[0023] When installing anchor bolts, the drilling of anchor holes and the application of coagulant are carried out in the same manner as in the existing technology. When drilling anchor bolts, the anchor bolts are first connected to the mining anchor bolt drilling rig. The distance of the "L"-shaped adjusting rod 2 extending from the transverse adjusting sleeve 21 is adjusted so that the distance between the two anchor bolt tray limiting posts 1 corresponds to the width of the anchor bolt tray. The two anchor bolt tray limiting posts 1 abut against the two sides of the anchor bolt tray respectively. When the anchor bolt rotates at high speed, the two anchor bolt tray limiting posts 1 restrict the anchor bolt tray from rotating with the anchor bolt, preventing the high-speed rotating anchor bolt tray from hitting the limbs of workers and causing injury. When the anchor bolt tray is close to the protective netting on the inner wall of the mine, the anchor bolt tray will not rub against the protective netting at high speed due to high-speed rotation, avoiding the danger of sparks caused by metal-to-metal contact, effectively improving the safety during the anchor bolt installation process. When using the same type of anchor bolt in the same mine, the relative position of the "L"-shaped adjusting rod 2 and the transverse adjusting sleeve 21 only needs to be adjusted initially, and can be used repeatedly in the same position thereafter.

[0024] An outer protective pad 11 is fixedly connected to the side wall of the anchor plate limiting post 1, and a contraction cavity 12 is provided inside the anchor plate limiting post 1. By setting the outer protective pad 11, direct contact between the anchor plate limiting post 1 and the anchor plate can be avoided, and the friction force when the anchor plate limiting post 1 and the anchor plate slide vertically relative to each other can be reduced. By setting the contraction cavity 12, a space can be provided to accommodate the top pressure spring 22 and the limiting plate 23.

[0025] Both transverse adjustment sleeves 21 have threaded fastening bolts 211 on their side walls, and the fastening bolts 211 penetrate through the side walls of the transverse adjustment sleeves 21. By setting the fastening bolts 211, the "L"-shaped adjustment rod 2 can be locked, restricting the "L"-shaped adjustment rod 2 from sliding freely in the transverse adjustment sleeves 21, thereby improving the stability of the "L"-shaped adjustment rod 2.

[0026] The top of the "L"-shaped adjusting rod 2 is equipped with a top pressure spring 22, which is filled in the contraction cavity 12. By setting the top pressure spring 22, the anchor tray limiting post 1 can be elastically supported. When the anchor tray limiting post 1 is not close to the mine tunnel side wall, the anchor tray limiting post 1 is pushed upward under the elastic force of the top pressure spring 22 and is in a high position, keeping the top of the anchor tray limiting post 1 protruding from the top of the anchor tray, thus improving the positioning effect of the anchor tray. When the anchor tray limiting post 1 is close to the mine tunnel side wall, the anchor tray limiting post 1 is squeezed and contracted by the mine tunnel side wall. At this time, the anchor tray limiting post 1 squeezes the top pressure spring 22 and gradually fits onto the outside of the "L"-shaped adjusting rod 2.

[0027] The top of the “L”-shaped adjusting rod 2 is fixedly connected to a limiting plate 23, which is slidably connected to the inner wall of the contraction cavity 12. By setting the limiting plate 23, it can cooperate with the contraction cavity 12 to limit the “L”-shaped adjusting rod 2, thus preventing the “L”-shaped adjusting rod 2 from separating from the anchor plate limiting post 1.

[0028] Both connecting rods 3 have an upper mounting sleeve 31 fixedly connected to their bottom ends, and a lower mounting sleeve 32 fixedly connected to the bottom end of the upper mounting sleeve 31. The upper mounting sleeve 31 and the lower mounting sleeve 32 are aligned and engaged on the outer wall of the positioning frame 4. By setting the upper mounting sleeve 31 and the lower mounting sleeve 32, it is easy to separate the connecting rod 3 from the positioning frame 4 or the operating handle. The upper mounting sleeve 31 and the lower mounting sleeve 32 can be separated, allowing the use of operating handles with a larger diameter range. When the diameter of the operating handle is too large, the lower mounting sleeve 32 can be discarded, and the upper mounting sleeve 31 can be directly welded to the operating handle. When the diameter is small, solder can be filled in the upper mounting sleeve 31 and the lower mounting sleeve 32 to fill the gap.

[0029] The bottom end of the positioning frame 4 is fixedly connected to the mounting ring 41. The width of the positioning frame 4 is greater than the ring diameter of the mounting ring 41. By setting the mounting ring 41, it can serve as a connection structure with the mining anchor drill. The positioning frame 4 is expanded outward relative to the mounting ring 41 to provide clearance space for the adjustment of the "L"-shaped adjusting rod 2 and the transverse adjusting sleeve 21, and can avoid the protruding structure at the end of the mining anchor drill.

[0030] The working principle and usage process of this utility model are as follows: When installing on a mining anchor drilling rig with an operating handle, the upper mounting sleeve 31 and the lower mounting sleeve 32 are directly fitted onto the appropriate position of the operating handle of the anchor drilling rig, and then welded to the operating handle of the anchor drilling rig. When installing on a mining anchor drilling rig without an operating handle, firstly, a mounting ring 41 of appropriate size is selected and welded to the appropriate position on the outer wall of the mining anchor drilling rig. If there is a slight error between the ring diameter of the mounting ring 41 and the diameter of the mining anchor drilling rig, it can be compensated by filling with welding material. Then, the upper mounting sleeve 31 and the lower mounting sleeve 32 are fitted onto the outside of the positioning frame 4. The anchor bolt is fixed by welding. When drilling the anchor bolt, the anchor bolt is first spliced ​​with the mining anchor bolt drilling machine. The distance of the "L"-shaped adjusting rod 2 extending from the horizontal adjusting sleeve 21 is adjusted so that the distance between the two anchor bolt tray limiting posts 1 corresponds to the width of the anchor bolt tray. The two anchor bolt tray limiting posts 1 abut against the two sides of the anchor bolt tray respectively. When the anchor bolt rotates at high speed, the two anchor bolt tray limiting posts 1 restrict the anchor bolt tray from rotating with the anchor bolt, avoiding the high-speed rotating anchor bolt tray from hitting the limbs of the workers and causing injury. When the anchor bolt tray is close to the protective net of the inner wall of the mine, the anchor bolt tray will not rub against the protective net at high speed due to high-speed rotation, avoiding the danger of sparks caused by metal collision.

Claims

1. A protective device for coal mine tunneling, characterized in that: It includes two anchor tray limiting posts (1), and each of the two anchor tray limiting posts (1) is inserted with an "L" shaped adjusting rod (2) at the bottom. The outer wall of the crossbar of each of the two "L" shaped adjusting rods (2) is fitted with a transverse adjusting sleeve (21). Each of the two transverse adjusting sleeves (21) is fixedly connected to a connecting rod (3) on the opposite side. The bottom of each of the two connecting rods (3) is fitted with a positioning frame (4).

2. The protective device for coal mine tunneling according to claim 1, characterized in that: An outer protective pad (11) is fixedly connected to the side wall of the anchor tray limiting post (1), and a contraction cavity (12) is opened inside the anchor tray limiting post (1).

3. A protective device for coal mine tunneling according to claim 1, characterized in that: Both of the sidewalls of the lateral adjustment sleeves (21) are threaded with fastening bolts (211), which penetrate the sidewalls of the lateral adjustment sleeves (21).

4. A protective device for coal mine tunneling according to claim 2, characterized in that: The top of the "L"-shaped adjusting rod (2) is provided with a top pressure spring (22), which is filled in the contraction cavity (12).

5. A protective device for coal mine tunneling according to claim 4, characterized in that: The top of the "L"-shaped adjusting rod (2) is fixedly connected to a limiting plate (23), and the limiting plate (23) is slidably connected to the inner wall of the contraction cavity (12).

6. A protective device for coal mine tunneling according to claim 1, characterized in that: The bottom ends of the two connecting rods (3) are fixedly connected to an upper mounting sleeve (31), and the bottom end of the upper mounting sleeve (31) is fixedly connected to a lower mounting sleeve (32). The upper mounting sleeve (31) and the lower mounting sleeve (32) are aligned and engaged on the outer wall of the positioning frame (4).

7. A protective device for coal mine tunneling according to claim 1, characterized in that: The bottom end of the positioning frame (4) is fixedly connected to an installation ring (41), and the width of the positioning frame (4) is greater than the diameter of the installation ring (41).

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