Coal mine roof supporting protection net

Abstract

The utility model relates to related technical field of protective net, especially a coal mine roof support protective net, including protective net body, the left and right sides of protective net body all are provided with detachable connecting plate, is provided with positioning connection subassembly on the connecting plate. The utility model discloses through the double positioning cooperation of square slot, locating block and locating groove, realizes the high accuracy alignment of adjacent protective net, can strictly limit the relative rotation of adjacent connecting plate, avoids the left and right torsion misplacement when splicing, primarily ensures protective net edge alignment, and the card block inserts the card slot, forms the primary mechanical limiting of splicing, prevents the horizontal separation of adjacent protective net, through the cooperation of limiting block and limiting slot, thereby played the effect of limiting locking to two adjacent protective nets, guarantees the stability after the splicing of two adjacent protective nets.

Description

Technical Field

[0001] This utility model relates to the technical field of protective nets, and in particular to a protective net for the roof support of coal mines. Background Technology

[0002] Coal mine support netting is a device used to protect the walls of coal mine roadways from collapse. It is usually woven from materials such as steel wire rope, steel bars, and plastic. Support netting is usually laid in sections, so in coal mines, multiple support nettings need to be spliced ​​together to form a complete protective structure.

[0003] According to application number CN202222536066.5, a soil and water erosion protection net fixing structure for drainage field of open coal mine is disclosed, including a protective net, and two lower pressure plates are movably attached to the bottom outer surface of the protective net, and two nuts are fixedly installed on the bottom outer surface of each of the two lower pressure plates.

[0004] The protective nets in the above cases lack a splicing structure. During on-site splicing, workers must visually align the edges of adjacent protective nets. Due to limited underground lighting and narrow tunnel spaces, relying solely on manual judgment can easily lead to misalignment and gaps between adjacent protective nets. Such splicing deviations can create blind spots in the protective nets, allowing roof debris to fall through these gaps, not only rendering them ineffective but also potentially injuring workers below or damaging mining equipment. Furthermore, the presence of gaps can cause uneven stress on the protective nets, leading to localized stress concentrations that can cause tearing and further reducing support stability, resulting in poor stability between adjacent protective nets. Therefore, we provide a coal mine roof support protective net. Utility Model Content

[0005] The purpose of this utility model is to provide a protective net for the roof of a coal mine to solve the problems mentioned in the background art.

[0006] The technical solution adopted in this utility model is to splice two adjacent protective nets together, which ensures the stability of the spliced ​​two adjacent protective nets.

[0007] A protective net for coal mine roof support includes a protective net body, with detachable connecting plates on both the left and right sides of the protective net body. The connecting plates are provided with positioning connecting components for positioning two adjacent protective net bodies, and the connecting plates are provided with locking limiting components for limiting and fixing two adjacent protective net bodies.

[0008] The positioning connection assembly includes a slot and a plug. The slot is located on the right side of the connection plate, and the plug is installed on the left side of the connection plate, corresponding to the position of the slot. Both the slot and the plug are square in shape.

[0009] Optionally, the positioning connection assembly further includes a positioning block and a positioning groove. The positioning block is installed on the left side of the inner wall of the slot, and the positioning groove is opened on the left side of the insertion block and corresponds to the position of the positioning block. Both the positioning block and the positioning groove are cylindrical in shape.

[0010] Optionally, the locking and limiting component includes a locking block, a locking slot, and a fixing slot. The locking block is mounted on the connecting plate located on the left side, the locking slot is opened on the connecting plate located on the right side and corresponds to the position of the locking block, and the fixing slot is opened on the connecting plate located on the right side.

[0011] Optionally, a threaded rod is rotatably connected to the groove at the bottom of the inner wall of the fixed groove via a bearing. The top end of the threaded rod passes through the fixed groove and extends to the outside of it where a rotating block is installed. A movable block is threadedly connected to the surface of the threaded rod, and a movable block is installed at the bottom of the movable block.

[0012] Optionally, the bottom of the movable block passes through the fixing groove and the slot from top to bottom and extends into the interior of the slot. A stop block is installed at the bottom of the movable block, and a limit block is installed at the bottom of the stop block.

[0013] Optionally, a limiting groove adapted to the limiting block is provided on the left side of the top of the card block, corresponding to the position of the limiting block. Both the limiting block and the limiting groove are made of square shape.

[0014] Optionally, mounting blocks are installed on both sides of the protective net body and on the front and back of the connecting plate. A fastening bolt is provided on the mounting block on the front side. The rear end of the fastening bolt passes through the mounting block on the front side, the connecting plate and the mounting block on the rear side from front to back and extends into the interior of the mounting block on the rear side and is threaded to the inner wall of the mounting block on the rear side.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention achieves high-precision alignment of adjacent protective nets through the dual positioning cooperation of square slots, positioning blocks, and positioning grooves. It can strictly limit the relative rotation of adjacent connecting plates, avoid left and right twisting misalignment during splicing, and initially ensure the alignment of the protective net edges. The card block is inserted into the card groove to form an initial mechanical limit at the splicing point, preventing the lateral separation of adjacent protective nets. Through the cooperation of the limit block and the limit groove, it achieves the effect of limiting and locking the two adjacent protective nets, ensuring the stability of the two adjacent protective nets after splicing. This locking structure improves the fastening strength of the splicing point of adjacent protective nets, can withstand the impact of falling rock and dynamic stress for a long time, greatly reduces the probability of loosening and separation at the splicing point, reduces the frequency of regular maintenance, and ensures the continuity of mining operations. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure in this application;

[0019] Figure 2 This is a three-dimensional cross-sectional view of the structure in this application;

[0020] Figure 3 This is a three-dimensional structural diagram showing the connection plate and protective net separated in this application;

[0021] Figure 4 This is a three-dimensional cross-sectional view of the connecting plate on the right side in this application;

[0022] Figure 5 This is a three-dimensional cross-sectional view of the connecting plate on the left side in this application.

[0023] Figure label:

[0024] 1. Protective net body; 100. Connecting plate; 2. Positioning connection assembly; 21. Slot; 22. Insert block; 23. Positioning block; 24. Positioning groove; 3. Locking and limiting assembly; 31. Locking block; 32. Locking groove; 33. Fixing groove; 34. Threaded rod; 35. Rotating block; 36. Moving block; 37. Movable block; 38. Stop block; 39. Limiting block; 310. Limiting groove; 4. Mounting block; 5. Fastening bolt. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify 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. Therefore, they should not be construed as limitations on this utility model.

[0026] Given that current technology makes it inconvenient to splice two adjacent protective nets, thus affecting the overall stability and safety of the protective nets during use, splicing positioning is incomplete, alignment accuracy is poor, and the risk of leakage is prominent.

[0027] like Figure 1-5 As shown, this utility model embodiment provides a coal mine roof support and protection net, including a net body 1. The net body 1 is woven from high-strength materials such as steel wire rope and steel bars, possessing excellent impact and tear resistance, and can withstand the impact of falling rock and rock pressure for a long time, avoiding protection failure due to insufficient material strength. Its mesh structure can disperse impact force, reduce local stress concentration, extend the overall service life, and ensure continuous protection of the roof. Connecting plates 100 are provided on both the left and right sides of the net body 1. Mounting blocks 4 are installed on both the left and right sides of the net body 1, and on the front and back of the connecting plates 100. Fastening bolts 5 are provided on the mounting blocks 4 on the front side. The rear end of bolt 5 passes through the mounting block 4 on the front side, the connecting plate 100 and the mounting block 4 on the rear side in sequence from front to back, and extends into the interior of the mounting block 4 on the rear side and is threadedly connected to the inner wall of the mounting block 4 on the rear side. Through the cooperation of mounting block 4 and fastening bolt 5, the connecting plate 100 can be disassembled and assembled. The disassembled design solves the defect of the existing connecting plate 100 and the protective net being integrally formed. When the protective net body 1 or the connecting plate 100 is partially damaged, it can be disassembled and replaced separately without replacing the whole, which greatly reduces the cost of consumables and maintenance time. Tightening the fastening bolt 5 separates the fastening bolt 5 from the connecting plate 100, and the disassembly of the connecting plate 100 can be completed.

[0028] The connecting plate 100 is provided with a positioning connecting component 2, which includes a slot 21 and a plug 22. The slot 21 is located on the connecting plate 100 on the right side, and the plug 22 is installed on the connecting plate 100 on the left side and corresponds to the position of the slot 21. The slot 21 and the plug 22 are both square in shape. The square structure can strictly limit the relative rotation of adjacent connecting plates 100 and avoid left and right twisting misalignment during splicing. The positioning connecting component 2 also includes a positioning block 23 and a positioning groove 24. The positioning block 23 is installed on the left side of the inner wall of the slot 21, and the positioning groove 24 is located on the left side of the plug 22 and corresponds to the position of the positioning block 23. The positioning block 23 and the positioning groove 24 are both cylindrical in shape. The point-to-point tight fit of the cylindrical structure can completely eliminate the longitudinal height difference and lateral offset of adjacent protective nets and control the splicing gap to a minimum.

[0029] A locking and limiting component 3 is provided on the connecting plate 100. The locking and limiting component 3 includes a locking block 31, a locking groove 32, and a fixing groove 33. The locking block 31 is installed on the connecting plate 100 located on the left side. The locking groove 32 is opened on the connecting plate 100 located on the right side and corresponds to the position of the locking block 31. When splicing, the locking block 31 is inserted into the locking groove 32 to form a lateral mechanical limit for adjacent protective nets. The fixing groove 33 is opened on the connecting plate 100 located on the right side. A threaded rod 34 is rotatably connected to the groove at the bottom of the inner wall of the fixing groove 33 through a bearing. The top end of the threaded rod 34 passes through the fixing groove 33 and extends to the outside of it, where a rotating block 35 is installed. The bottom of the rotating block 35 is in rotatable contact with the top of the connecting plate 100 located on the right side. A moving block 36 is threadedly connected to the surface of the threaded rod 34. The surface of the moving block 36 is in sliding contact with the inner wall of the fixing groove 33, so that the rotational force of the threaded rod 34 can be converted into driving the moving block 36 to move up and down. The screw drive has a self-locking property, and the moving block 36 can be stably stopped at the current position without loosening due to underground mining vibration or rock creep. The bottom of the moving block 36 is equipped with a movable block 37. By rotating the rotating block 35, the moving block 36, movable block 37, stop block 38 and limit block 39 are driven to move up and down, so that the limit block 39 can be inserted into or pulled out of the limit groove 310. The bottom of the movable block 37 passes through the fixed groove 33 and the slot 32 from top to bottom and extends into the interior of the slot 32. The bottom of the movable block 37 is equipped with a stop block 38, and the bottom of the stop block 38 is equipped with a limit block 39. The left side of the top of the slot 31 is provided with a limit groove 310 that matches the limit block 39. The limit block 39 and the limit groove 310 are both made of square. When the movable block 37 moves down, the limit block 39 is embedded in the limit groove 310 to achieve all-round locking.

[0030] When in use, align the square plug 22 on the left connecting plate 100 of the first protective net with the square slot 21 on the right connecting plate 100 of the second protective net, and move the plug 22 to the right so that the plug 22 is fully inserted into the slot 21. At the same time, the positioning block 23 is inserted into the positioning groove 24 and the locking block 31 is inserted into the locking groove 32.

[0031] Then the rotating block 35 can be rotated, which drives the threaded rod 34 to rotate. The threaded rod 34 drives the moving block 36 and the movable block 37 to move downward. The movable block 37 drives the stop block 38 to move downward. The stop block 38 drives the limit block 39 to insert into the limit groove 310 on the card block 31, thus completing the splicing of two adjacent protective net bodies 1.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A protective net for the roof support of a coal mine, characterized in that: The device includes a protective net body (1), on which detachable connecting plates (100) are provided on both the left and right sides. A positioning connecting component (2) is provided on the connecting plate (100), which is used to position two adjacent protective net bodies (1). A locking limiting component (3) is provided on the connecting plate (100), which is used to limit and fix two adjacent protective net bodies (1). The positioning connecting component (2) includes a slot (21) and a plug (22). The slot (21) is opened on the connecting plate (100) on the right side, and the plug (22) is installed on the connecting plate (100) on the left side and corresponds to the position of the slot (21). The slot (21) and the plug (22) are both square in shape.

2. The coal mine roof support and protection net according to claim 1, characterized in that: The positioning connection component (2) further includes a positioning block (23) and a positioning groove (24). The positioning block (23) is installed on the left side of the inner wall of the slot (21). The positioning groove (24) is opened on the left side of the insert (22) and corresponds to the position of the positioning block (23). The positioning block (23) and the positioning groove (24) are both cylindrical.

3. The coal mine roof support and protection net according to claim 1, characterized in that: The locking and limiting component (3) includes a locking block (31), a locking slot (32) and a fixing slot (33). The locking block (31) is installed on the connecting plate (100) located on the left side. The locking slot (32) is opened on the connecting plate (100) located on the right side and corresponds to the position of the locking block (31). The fixing slot (33) is opened on the connecting plate (100) located on the right side.

4. The coal mine roof support and protection net according to claim 3, characterized in that: A threaded rod (34) is rotatably connected to the groove at the bottom of the inner wall of the fixed groove (33) via a bearing. The top end of the threaded rod (34) passes through the fixed groove (33) and extends to the outside of it where a rotating block (35) is installed. A movable block (36) is threadedly connected to the surface of the threaded rod (34), and a movable block (37) is installed at the bottom of the movable block (36).

5. A coal mine roof support and protection net according to claim 4, characterized in that: The bottom of the movable block (37) passes through the fixed groove (33) and the slot (32) from top to bottom and extends into the interior of the slot (32). A stop block (38) is installed at the bottom of the movable block (37), and a limit block (39) is installed at the bottom of the stop block (38).

6. A coal mine roof support and protection net according to claim 5, characterized in that: The card block (31) has a limiting groove (310) on the left side of the top corresponding to the position of the limiting block (39), which is adapted to the limiting block (39). Both the limiting block (39) and the limiting groove (310) are made of square shape.

7. The coal mine roof support and protection net according to claim 1, characterized in that: Mounting blocks (4) are installed on both sides of the protective net body (1) and on the front and back of the connecting plate (100). A fastening bolt (5) is provided on the mounting block (4) on the front side. The rear end of the fastening bolt (5) passes through the mounting block (4) on the front side, the connecting plate (100) and the mounting block (4) on the rear side from front to back and extends into the interior of the mounting block (4) on the rear side and is threaded to the inner wall of the mounting block (4).

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