A protective device for coal mining

Abstract

The utility model discloses a kind of protective devices for coal mining in coal mine, including two fixed beams, the side of fixed beam is equipped with several installation through holes, the side of another side of fixed beam is equipped with several clamping grooves, the side of two fixed beams equipped with clamping groove is oppositely arranged, several protective strips are clamped between two fixed beams, protective strip one end is equipped with the clamping piece one matched with clamping groove, the other end of protective strip is threaded rod, fastener is threadedly connected with threaded rod, fastener one end is equipped with the clamping piece two matched with clamping groove, fastener other end is equipped with screwing piece, fastener is equipped with the threaded through hole matched with threaded rod, fastener is realized with protective strip by the threaded cooperation of threaded rod and threaded through hole Threaded connection. By connecting several protective strips with fixed beam separately, protective strip can be replaced separately when damaged, so that the purpose of not needing large-area replacement net body is realized.

Description

Technical Field

[0001] This utility model belongs to the technical field of coal mine protection equipment, and in particular relates to a support net device for coal mining. Background Technology

[0002] During coal mining operations, in order to prevent loose rocks and coal gangue from falling from the top of the roadway and injuring people or damaging underground equipment such as coal mining machines and conveyors, the construction unit will install support nets on the top of the roadway to intercept falling objects.

[0003] Traditional support nets use metal warp and weft mesh. For example, Chinese utility model patent CN212154802U discloses a mine protection net structure device, which includes a support net. The support net includes an inner mesh layer and an outer mesh layer. The connection between the inner mesh layer and the outer mesh layer is a chain knot. The support net with warp and weft mesh structure has a flat surface, is easy to install and stable, and is widely used.

[0004] However, the support net with warp and weft mesh structure is a continuous planar structure formed by the cross weaving of warp and weft threads. Once a certain area (such as a single warp or weft thread breaks) is damaged, the damaged part may cause the surrounding mesh to deform or the threads to loosen due to the imbalance of force, resulting in the overall damage of the support net. It is also difficult to repair local damage, and a large area or the entire mesh needs to be replaced, which increases the maintenance cost of the support net and reduces the maintenance efficiency. Utility Model Content

[0005] The purpose of this invention is to connect several protective strips to the fixed beam individually, so that the protective strips can be replaced individually when they are damaged. This achieves the goal of not needing to replace the entire mesh with a large area, thus solving the problem in the background art where the support mesh structure of the warp and weft mesh is difficult to repair for local damage, requires a large area replacement of the mesh, increases the maintenance cost of the support mesh, and reduces the maintenance efficiency of the support mesh.

[0006] The specific technical solution of this utility model is as follows: A protective device for coal mining includes two fixed beams. One side of each fixed beam has several mounting through holes, and the other side has several slots. The two fixed beams with slots face each other. Several protective strips are clamped between the two fixed beams. Each protective strip includes a threaded rod. One end of the threaded rod has a first clamp that matches the slot, and the other end of the threaded rod is threaded with a fastener. One end of the fastener has a second clamp that matches the slot, and the other end of the fastener has a screwing component. The fastener has a threaded through hole that matches the threaded rod. The fastener is threadedly connected to the protective strip through the threaded engagement between the threaded rod and the threaded through hole.

[0007] Furthermore, the longitudinal section of the fixed beam is H-shaped, and there are several mounting through holes arranged in a horizontal array on one side of the fixed beam, and several slots arranged in a horizontal array on the other side of the fixed beam.

[0008] Furthermore, there are two rows of mounting through holes arranged horizontally on one side of the fixed beam, with the two rows of mounting through holes located near the upper and lower parts of the fixed beam, respectively. There are two rows of slots arranged horizontally on the other side of the fixed beam, with the two rows of slots located at the upper and lower parts of the fixed beam, respectively.

[0009] Furthermore, the cross-section of the slot is rectangular, the longitudinal section of the protective strip is circular, the diameter of the protective strip is smaller than the width of the slot, the longitudinal section of the first clip is circular, the diameter of the first clip is larger than the width of the slot, the longitudinal section of the second clip is circular, and the diameter of the second clip is larger than the width of the slot.

[0010] Furthermore, the longitudinal section of the screwing component is a regular hexagon.

[0011] Furthermore, the second locking component is located on the side of the slot closer to the inside of the fixed beam, while the screwing component is located on the side of the slot away from the inside of the fixed beam.

[0012] Furthermore, several reinforcing members are provided between the two fixed beams. The reinforcing members include an upper pressure member and a lower pressure member. Several protective strips are located between the upper pressure member and the lower pressure member. The upper pressure member and the lower pressure member are fixedly connected by fastening components.

[0013] Furthermore, the opposing surfaces of the upper and lower pressing parts are provided with several limiting grooves that are used in conjunction with the protective strip.

[0014] Furthermore, the upper and lower pressure components are respectively provided with fastening through holes near their ends, and the upper and lower pressure components are fixedly connected by fastening bolts and fastening through holes.

[0015] Furthermore, the reinforcing components and protective strips are interwoven at a 90-degree angle.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In use, insert one end of the protective strip into the slot of the fixed beam, attach a fastener to the other end of the protective strip, and insert the fastener into the slot of another fixed beam. Tighten the fastener, and through the cooperation of the first and second clips with the slots, the protective strip is snapped between the two fixed beams. When the protective strip is damaged by a falling object, it can be replaced individually or in groups through the snap-fit ​​connection between the protective strip and the fixed beam. This eliminates the need for large-area or complete replacement of the mesh, reducing the maintenance cost of the support mesh, saving maintenance time, and improving maintenance efficiency.

[0017] The reinforcing components not only improve the stability of the protective strip during use, but also disperse the impact force received by a single protective strip, increasing the overall strength of the protective device. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 2 This is an exploded view of the assembly of the protective strip and fasteners in this embodiment of the present invention; Figure 3 This is an exploded view of the assembly of the upper and lower pressing parts in an embodiment of this utility model; Figure 4 This is a three-dimensional structural diagram of the fixed beam in an embodiment of this utility model; Figure label: 1. Fixed beam; 11. Mounting through hole; 12. Slot; 2. Protective strip; 21. Clip 1; 22. Threaded rod; 3. Fasteners; 31. Clip II; 32. Screw fasteners; 33. Threaded through holes; 4. Reinforcing component; 41. Upper pressing component; 42. Lower pressing component; 43. Limiting groove; 44. Fastening through hole. Detailed Implementation

[0019] To better understand the purpose, structure, and function of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0020] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] See Figures 1 to 4This embodiment discloses a protective device for coal mining, including two fixed beams 1. One side of each fixed beam 1 has several mounting through holes 11. Expansion bolts can be used to fix the fixed beams 1 to the side walls of a coal mine roadway. The other side of each fixed beam 1 has several slots 12. The two fixed beams 1 are installed opposite each other on the side walls of the coal mine roadway, with the sides of the two fixed beams 1 having the slots 12 facing each other. Several protective strips 2 are clamped between the two fixed beams 1. Each protective strip 2 includes a threaded rod 22. One end of the threaded rod 22 has a first clamping piece 21 that matches the slot 12, and the other end of the threaded rod 22 is threadedly connected to a fastener 3. One end of the fastener 3 has a second clamping piece 31 that matches the slot 12, and the other end of the fastener 3 has a screwing piece 32. The fastener 3 has a threaded through hole 33 that matches the threaded rod 22. The fastener 3 is connected to the threaded rod 22 via the threaded through hole. The threaded engagement between rod 22 and threaded through hole 33 enables threaded connection with protective strip 2. In use, one end of protective strip 2 is inserted into slot 12 of fixed beam 1, and fastener 3 is installed on the other end of protective strip 2. Fastener 3 is then inserted into slot 12 of another fixed beam 1 and tightened. Through the threaded connection between fastener 3 and protective strip 2, and the engagement of fastener 1 21 and fastener 2 31 with slot 12, protective strip 2 is secured between two fixed beams 1. Several protective strips 2 serve as a support net. When protective strip 2 is damaged by falling objects, it can be removed from fixed beam 1 by tightening fastener 3 in the opposite direction through the snap-fit ​​connection between protective strip 2 and fixed beam 1. This allows for single or multiple replacement of protective strip 2 without the need for large-area or complete replacement of the net, reducing support net maintenance costs, saving maintenance time, and improving maintenance efficiency.

[0022] The longitudinal section of the fixed beam 1 is H-shaped. The H-shaped fixed beam 1 has high structural stability and is not easily deformed. There are several installation through holes 11 arranged horizontally on one side of the fixed beam 1, and several slots 12 arranged horizontally on the other side of the fixed beam 1. The array of slots 12 makes the distance between the protective strips 2 equal, so that the load of the protective strips 2 is evenly distributed, reducing the risk of local breakage of the protective device.

[0023] The fixed beam 1 has two rows of horizontally arranged mounting holes 11 on one side of its facade. These holes are located near the upper and lower parts of the fixed beam 1, respectively. The fixed beam 1 can be fixed by using expansion bolts in conjunction with the mounting holes 11 on both sides, improving the overall stability and firmness of the protective device. The fixed beam 1 has two rows of horizontally arranged slots 12 on the other side of its facade. These slots are located at the upper and lower parts of the fixed beam 1, respectively, ensuring that the fixed beam 1 can be installed without distinguishing between the upper and lower directions, thus improving installation convenience. Furthermore, the upper and lower slots 12 can simultaneously engage several protective strips 2, improving the protective effect. To further optimize this design, the upper and lower slots 12 of the fixed beam 1 are staggered. This reduces the gap between adjacent protective strips 2 when several protective strips 2 are engaged simultaneously, further improving the protective effect.

[0024] The slot 12 has a rectangular cross-section, and the protective strip 2 has a circular longitudinal section. The diameter of the protective strip 2 is smaller than the width of the slot 12. The first clamp 21 has a circular longitudinal section and a diameter larger than the width of the slot 12. The first clamp 21 can be engaged inside the slot 12 to stabilize the position of the protective strip 2. The second clamp 31 has a circular longitudinal section and a diameter larger than the width of the slot 12. The second clamp 31 can be engaged inside the slot 12 to stabilize the position of the protective strip 2. The second clamp 31 has a circular longitudinal section, and when tightening the fastener 3, the second clamp 31 can rotate within the slot 12, which facilitates the tightening operation. It can be further optimized that the longitudinal section of the connection between the protective strip 2 and the first clamp 21 is a rectangle with a width that matches the width of the slot 12. In this way, when tightening the fastener 3, the slot 12 can restrict the rotation of the protective strip 2, which further facilitates the tightening operation of the fastener 3.

[0025] The screwing part 32 has a regular hexagonal longitudinal section, which can be used with adjustable wrenches for easy screwing operation.

[0026] The second clamp 31 is located on the side of the clamping groove 12 closer to the inside of the fixed beam 1, and the screwing part 32 is located on the side of the clamping groove 12 away from the inside of the fixed beam 1. This makes it convenient for installers to screw the screwing part 32 with tools. If the screwing part 32 is also located on the side of the clamping groove 12 closer to the inside of the fixed beam 1, it will be inconvenient to screw the fastener 3.

[0027] Several reinforcing members 4 are provided between the two fixed beams 1. The reinforcing members 4 include an upper pressing member 41 and a lower pressing member 42. Several protective strips 2 are located between the upper pressing member 41 and the lower pressing member 42. The upper pressing member 41 and the lower pressing member 42 are fixedly connected by fastening components. The reinforcing members 4 connect the several protective strips 2 together, which not only improves the stability of the protective strips 2 during use, but also disperses the impact force received by a single protective strip 2, increasing the overall strength of the protective device.

[0028] The upper pressing member 41 and the lower pressing member 42 have several limiting grooves 43 that are used in conjunction with the protective strip 2 on their facing surfaces. When the upper pressing member 41 and the lower pressing member 42 are connected together, the protective strip 2 is located in the limiting grooves 43, which stabilizes the position of the reinforcing member 4 and the protective strip 2.

[0029] The upper pressure member 41 and the lower pressure member 42 are respectively provided with fastening through holes 44 near their ends. The upper pressure member 41 and the lower pressure member 42 are fixedly connected by fastening bolts and fastening through holes 44.

[0030] The reinforcing member 4 and the protective strip 2 are interwoven at a 90-degree angle. The orthogonal grid formed by the reinforcing member 4 and the protective strip 2 forms a two-way rigid frame, which enhances the shear and bending resistance. In addition, the mesh size formed by the reinforcing member 4 and the protective strip 2 is uniform, avoiding local damage caused by stress concentration. By adjusting the distance between several reinforcing members 4, the mesh size formed by the reinforcing member 4 and the protective strip 2 can be adjusted, which improves the applicability of the protective device.

[0031] Working principle: In use, one end of the protective strip 2 is inserted into the slot 12 of the fixed beam 1, and the other end of the protective strip 2 is fitted with a fastener 3. The fastener 3 is then inserted into the slot 12 of another fixed beam 1. The fastener 3 is tightened, and the protective strip 2 is snapped between the two fixed beams 1 through the cooperation of the first clip 21 and the second clip 31 with the slot 12. When the protective strip 2 is damaged by a falling object, it can be replaced by a single strip or several strips through the snap connection between the protective strip 2 and the fixed beam 1. This eliminates the need for large-area or complete replacement of the netting, reducing the maintenance cost of the support netting, saving maintenance time, and improving maintenance efficiency. The reinforcing member 4 not only improves the stability of the protective strip 2 during use but also disperses the impact force received by a single protective strip 2, increasing the overall strength of the protective device.

[0032] 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 concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A protective device for coal mining, characterized in that: It includes two fixed beams (1), one side of the fixed beam (1) is provided with several mounting through holes (11), the other side of the fixed beam (1) is provided with several slots (12), the two fixed beams (1) are arranged facing each other on the side with slots (12), and several protective strips (2) are snapped between the two fixed beams (1). The protective strip (2) includes a threaded rod (22), one end of the threaded rod (22) is provided with a first clip (21) that matches the slot (12), the other end of the threaded rod (22) is threadedly connected to a fastener (3), one end of the fastener (3) is provided with a second clip (31) that matches the slot (12), the other end of the fastener (3) is provided with a screwing part (32), the fastener (3) is provided with a threaded through hole (33) that matches the threaded rod (22), and the fastener (3) is threadedly connected to the protective strip (2) through the threaded engagement of the threaded rod (22) and the threaded through hole (33).

2. The protective device for coal mining according to claim 1, characterized in that, The longitudinal section of the fixed beam (1) is H-shaped. There are several through holes (11) on one side of the fixed beam (1) and several slots (12) on the other side of the fixed beam (1).

3. The protective device for coal mining according to claim 2, characterized in that, The fixed beam (1) has two rows of through holes (11) arranged horizontally on one side of the facade. The two rows of through holes (11) are close to the upper and lower parts of the fixed beam (1) respectively. The fixed beam (1) has two rows of slots (12) arranged horizontally on the other side of the facade. The two rows of slots (12) are located at the upper and lower parts of the fixed beam (1) respectively.

4. The protective device for coal mining according to claim 1, characterized in that, The cross-section of the slot (12) is rectangular, the longitudinal section of the protective strip (2) is circular, the diameter of the protective strip (2) is smaller than the width of the slot (12), the longitudinal section of the first card (21) is circular, the diameter of the first card (21) is larger than the width of the slot (12), the longitudinal section of the second card (31) is circular, and the diameter of the second card (31) is larger than the width of the slot (12).

5. The protective device for coal mining according to claim 1, characterized in that, The longitudinal section of the screw-on part (32) is a regular hexagon.

6. The protective device for coal mining according to claim 5, characterized in that, The second clip (31) is located on the side of the slot (12) close to the inside of the fixed beam (1), and the screwing part (32) is located on the side of the slot (12) away from the inside of the fixed beam (1).

7. The protective device for coal mining according to claim 1, characterized in that, Several reinforcing members (4) are provided between the two fixed beams (1). The reinforcing members (4) include an upper pressing member (41) and a lower pressing member (42). Several protective strips (2) are located between the upper pressing member (41) and the lower pressing member (42). The upper pressing member (41) and the lower pressing member (42) are fixedly connected by fastening components.

8. The protective device for coal mining according to claim 7, characterized in that, The upper pressing member (41) and the lower pressing member (42) have several limiting grooves (43) that are used in conjunction with the protective strip (2) on their facing surfaces.

9. The protective device for coal mining according to claim 8, characterized in that, The upper pressure member (41) and the lower pressure member (42) are respectively provided with fastening through holes (44) near their two ends. The upper pressure member (41) and the lower pressure member (42) are fixedly connected by fastening bolts and fastening through holes (44).

10. The protective device for coal mining according to claim 9, characterized in that, The reinforcing member (4) and the protective strip (2) are intertwined at a 90-degree angle.

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