Protective scaffold for use in coal mines

Abstract

The utility model relates to the technical field of scaffold, concretely to a protective scaffold for underground coal mine, including bottom support piece, middle part support piece and top support piece, the top support piece is provided with first protective frame and second protective frame, the end face of first protective frame towards second protective frame is opened with a plurality of groups of recess, the end face of second protective frame towards first protective frame is fixedly connected with a plurality of groups of movable rod, the one end of each group movable rod corresponds and inserts the inside of a group recess, and the rod body end of movable rod insertion recess is fixedly connected with spring between the groove bottom of recess, the utility model discloses a double -layer protective frame and elastic buffer are set up in the top end of scaffold, and the double -layer protective net, rotatable protective frame support structure, vertical height adjusting assembly and inclined guide plate are matched, the buffer interception protection of underground rockfall is realized, and flexible protection height can be adjusted, and the rockfall is conveniently dumped.

Description

Technical Field

[0001] This utility model relates to the field of scaffolding technology, specifically a protective scaffolding for use in underground coal mines. Background Technology

[0002] Coal mine underground scaffolding is a temporary support and operating platform structure used in underground coal mine roadways, chambers and other work scenarios. It mainly provides a stable working base and safety protection for high-altitude or airborne operations such as underground roadway maintenance, equipment installation and commissioning, roof support and reinforcement, and pipeline laying.

[0003] In the working environment of underground coal mines, rockfalls from the roof are common. Therefore, underground scaffolding typically has a protective structure at the top to intercept and protect against falling rocks. Existing protective structures for underground scaffolding often use a single-layer rigid protective net. This type of structure lacks sufficient elastic buffering design, easily resulting in hard contact when impacted by falling rocks. This makes it difficult to effectively disperse and dissipate the impact load, easily causing damage and deformation to the protective net and its supporting frame. It also reduces the stability of the protective structure, shortening the overall service life of the system and making it unsuitable for the complex and variable rockfall impact protection requirements of underground coal mines. Therefore, we propose a protective scaffolding design for underground coal mines. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a protective scaffold for underground coal mines, comprising a bottom support, a middle support, and a top support. The bottom support and the top support are fixedly connected via the middle support. The top support is provided with a first protective frame and a second protective frame. The second protective frame is coaxially positioned directly above the first protective frame. Multiple sets of grooves are formed on the end face of the first protective frame facing the second protective frame. Multiple sets of movable rods are fixedly connected to the end face of the second protective frame facing the first protective frame. One end of each set of movable rods extends into the interior of a corresponding set of grooves. A spring is fixedly connected between the end of the movable rod extending into the groove and the bottom of the groove.

[0005] In some embodiments, the inner sidewall of each set of grooves is provided with a limiting groove extending along the depth direction of the groove, and the outer wall of each set of movable rods is integrally formed with a limiting block. The limiting block is adapted to the limiting groove, and the limiting block is slidably fitted into the limiting groove.

[0006] In some embodiments, an anti-detachment block is fixedly connected to the end of the limiting groove away from the bottom of the groove. The inner end face of the anti-detachment block abuts against the outer end face of the limiting block, and the anti-detachment block is used to axially limit the limiting block.

[0007] In some embodiments, a first protective net is fixedly installed inside the frame of the first protective frame, and the outer periphery of the first protective net is fixedly connected to the inner wall of the first protective frame. A second protective net is fixedly installed inside the frame of the second protective frame, and the outer periphery of the second protective net is fixedly connected to the inner wall of the second protective frame.

[0008] In some embodiments, the top support further includes two sets of brackets and fixing rods. The two sets of brackets are symmetrically fixed at the two sides of the lower end face of the first protective frame. The two ends of the first protective frame are respectively provided with rotating grooves. The fixing rods are horizontally inserted into the rotating grooves, and both ends of the fixing rods are fixedly connected to the top of the brackets on the corresponding sides. A height adjustment component is provided between the bottom end of the brackets and the top end of the middle support.

[0009] In some embodiments, the height adjustment assembly includes a sleeve, a rod, and a fastener. The sleeve is vertically fixed to the top end face of the central support member, the rod is vertically fixed to the bottom outer wall of the bracket, the lower end of the rod is coaxially inserted into the inner cavity of the sleeve, and the fastener is threaded through the side wall of the sleeve and passes radially through the outer wall of the rod.

[0010] In some embodiments, a guide plate is fixedly connected to the outer wall of the second protective frame, and the guide plate is arranged in a downwardly inclined structure.

[0011] This utility model has at least the following beneficial effects: This utility model improves the top protection performance of scaffolding by setting a first protective frame and a second protective frame that cooperate with each other at the top of the scaffolding, combining an elastic telescopic structure composed of grooves, movable rods and springs, and matching it with a limit anti-detachment component and a double-layer protective net.

[0012] This utility model achieves flexible adjustment of the protective height and unloading of the protective frame by setting a rotatable protective frame structure at the top of the scaffold, combined with a vertically connected height adjustment component and locking device, and by adding an inclined guide plate on the outside of the protective frame. This assists in guiding and sliding falling rocks, improving the adaptability of the scaffold and the convenience of clearing falling rocks. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the central support structure of this utility model; Figure 3 This is a schematic diagram of the top support structure of this utility model; Figure 4This is a schematic diagram of the second protective frame structure of this utility model; Figure 5 This is a schematic diagram of the support structure of this utility model; Figure 6 This is a schematic diagram of the spring structure of this utility model; Figure 7 This is a schematic diagram of the fixing rod structure of this utility model.

[0014] In the diagram: 1-Bottom support; 2-Middle support; 3-Top support; 4-First protective frame; 5-First protective net; 6-Second protective frame; 7-Second protective net; 8-Groove; 9-Modible rod; 10-Spring; 11-Limiting groove; 12-Limiting block; 13-Anti-detachment block; 14-Bracket; 15-Rotating groove; 16-Fixing rod; 17-Sleeve; 18-Sleeve rod; 19-Fastener; 20-Guide plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example 1: Please refer to Figure 1-6 This utility model provides a technical solution for protective scaffolding in coal mines: a protective scaffolding for coal mines includes a bottom support 1, a middle support 2 and a top support 3, with the bottom support 1 and the top support 3 fixedly connected by the middle support 2.

[0017] In use, the bottom support 1 is located at the lowest point of the scaffold and is in direct contact with the underground ground. It is the basic load-bearing structure of the scaffold and contains basic components such as upright bases and longitudinal and transverse ground bracing. It can bear the overall weight of the scaffold, complete the leveling operation of the scaffold, reduce the settlement of the uprights, and limit the tilting of the uprights, thereby stabilizing the overall foundation of the scaffold. The middle support 2 connects the upper end of the bottom support 1 and the lower end of the top support 3. It is the main load-bearing structure of the scaffold, which bears the main vertical load and layered force. At the same time, it can improve the overall rigidity of the scaffold and reduce the deformation and swaying of the scaffold during underground operations. The horizontal bar of the middle support member 2 can be used to build scaffold boards to form an operating layer, and can also be equipped with auxiliary structures such as stairs. The weight generated by workers standing and working and temporary material stacking can be evenly transferred to the bottom support member 1 through the middle support member 2. The layered stress structure design can reduce the local overload of the frame, improve the overall load-bearing capacity of the scaffold, and provide a stable operating platform for underground workers, reducing safety hazards during the operation.

[0018] The top support 3, located at the very top of the scaffold, is the core protective structure. Inside, a first protective frame 4 and a second protective frame 6 are coaxially arranged, with the second protective frame 6 directly above the first protective frame 4, and the central axes of the two frames coinciding. Multiple sets of grooves 8 are formed on the upper surface of the first protective frame 4 facing the second protective frame 6, recessing vertically inwards. Multiple sets of movable rods 9 are fixedly connected to the lower surface of the second protective frame 6 facing the first protective frame 4. These movable rods 9 extend vertically downwards, and the lower end of each set can correspondingly extend into the interior of a set of grooves 8. The movable rods 9 and grooves 8 are in a clearance fit, allowing them to slide along the depth of the groove 8. A spring 10 is fixedly connected between the end of the movable rod 9 extending into the groove 8 and the bottom of the groove 8. The spring 10 is completely housed inside the groove 8, initially supporting the second protective frame 6 and the first protective frame 4 at a predetermined distance.

[0019] Each set of grooves 8 has a limiting groove 11 extending along the depth direction of the groove 8 on its inner sidewall. Each set of movable rods 9 has a limiting block 12 integrally formed on its outer wall. The size of the limiting block 12 is adapted to the limiting groove 11, and the limiting block 12 is slidably fitted into the limiting groove 11, and can slide synchronously with the movable rod 9 in the limiting groove 11. An anti-detachment block 13 is fixedly connected to the end of the limiting groove 11 away from the bottom of the groove 8. The inner end face of the anti-detachment block 13 can abut against the outer end face of the limiting block 12, forming an axial limit on the limiting block 12, which can reduce the possibility of the limiting block 12 detaching from the limiting groove 11, thereby preventing the movable rod 9 from detaching from the groove 8, ensuring the stability of the sliding fit between the movable rod 9 and the groove 8. At the same time, the combination of the limiting groove 11 and the limiting block 12 can limit the sliding direction of the movable rod 9, reduce the possibility of the movable rod 9 rotating or deviating in the groove 8, and ensure that the extension and contraction deformation of the spring 10 is not affected.

[0020] The first protective frame 4 has a first protective net 5 fixedly installed inside its frame. The outer perimeter of the first protective net 5 is fixedly connected to the inner wall of the first protective frame 4, forming a lower protective surface that fits the protective frame. The second protective frame 6 has a second protective net 7 fixedly installed inside its frame. The outer perimeter of the second protective net 7 is fixedly connected to the inner wall of the second protective frame 6, forming an upper protective surface that fits the protective frame. The second protective net 7 is located directly above the first protective net 5, forming a double-layer protective structure. The second protective net 7 is made of elastic material, such as high-toughness nylon rope net or elastic steel wire mesh. The first protective net 5 is made of rigid material, such as thickened steel mesh or high-manganese steel woven mesh. This combination of elastic and rigid protection can adapt to the protection needs of falling rocks of different sizes and impact forces underground, reducing the possibility of insufficient protection from a single protective structure.

[0021] When a rock falls onto the surface of the second protective net 7, the instantaneous impact force will push the second protective frame 6 vertically towards the first protective frame 4. At the same time, the movable rod 9 at the lower end of the second protective frame 6 simultaneously penetrates into the groove 8, compressing the spring 10 inside the groove 8. The spring 10 absorbs most of the impact energy of the rock through its own deformation, significantly reducing the instantaneous impact force of the rock and reducing the damage caused by the impact force directly acting on the top structure of the scaffold. It also reduces the impact force transmitted downwards to the middle and bottom support structures. After being buffered by the second protective net 7, the falling rock or gravel will be effectively caught by the first protective net 5 below, reducing the possibility of the rock penetrating the second protective net 7 and falling into the working area below, forming a dual-layer protection mode of elastic buffering and rigid interception.

[0022] This protective scaffold is designed with a three-section support structure at the bottom, middle, and top. Combined with a double-layer protective frame and elastic buffer components at the top, it ensures the overall load-bearing stability and operational safety of the scaffold through the support structure at the bottom and middle, while also providing effective protection against falling rocks from the mine through the protective structure at the top. This provides corresponding protection for the personal safety of underground workers and the safety of equipment.

[0023] Example 2: Please refer to Figure 1-7 This utility model provides a technical solution for protective scaffolding used in underground coal mines: a protective scaffolding used in underground coal mines, wherein the top support 3 further includes two sets of brackets 14 and fixing rods 16. The two sets of brackets 14 are symmetrically fixed at the two sides of the lower end face of the first protective frame 4. The two ends of the first protective frame 4 are respectively provided with rotating grooves 15. The fixing rods 16 are horizontally inserted into the rotating grooves 15, and both ends of the fixing rods 16 are fixedly connected to the top of the corresponding brackets 14. A height adjustment component is provided between the bottom end of the brackets 14 and the top end of the middle support 2.

[0024] The height adjustment assembly includes a sleeve 17, a rod 18, and a fastener 19. The sleeve 17 is vertically fixed to the top end face of the middle support 2. The rod 18 is vertically fixed to the bottom outer wall of the bracket 14. The lower end of the rod 18 is coaxially inserted into the inner cavity of the sleeve 17. The fastener 19 is threaded through the side wall of the sleeve 17 and passes radially through the outer wall of the rod 18 along the sleeve 17.

[0025] A guide plate 20 is fixedly connected to the outer wall of the second protective frame 6. The guide plate 20 is set in an inclined structure that is tilted downwards.

[0026] Through the above technical solution: In use, the sleeve 17 is vertically fixed to the top end face of the middle support 2, and the sleeve rod 18 is vertically fixed to the bottom outer wall of the bracket 14. The lower end of the sleeve rod 18 is coaxially inserted into the inner cavity of the sleeve 17 to form a sleeve fit. The two can extend and retract relative to each other in the vertical direction to adjust the overall height of the bracket 14 and the upper protective frame. The fastener 19 is a bolt, which is threaded through the side wall of the sleeve 17 and abuts against the outer wall of the sleeve rod 18 radially. The sleeve 17 and the sleeve rod 18 are respectively provided with matching screw holes. After the bolt is inserted into the screw hole, it is locked and positioned. This structure can flexibly adapt to different working height requirements in coal mines, improve the adaptability of the top protective structure, eliminate the need for overall disassembly and adjustment of the scaffolding, make the operation more convenient, and save adjustment time in underground operations.

[0027] Two sets of brackets 14 are symmetrically fixed at the two sides of the lower end face of the first protective frame 4, serving as the supporting structure for the first protective frame 4. The fixing rods 16 at the top of the brackets 14 are horizontally inserted into the rotating grooves 15 opened at both ends of the first protective frame 4, and both ends of the fixing rods 16 are firmly connected to the top of the brackets 14 on the corresponding side. Relying on the sliding fit between the rotating grooves 15 and the fixing rods 16, the first protective frame 4 can rotate around the fixing rods 16. In underground operations, only one side of the fixing structure needs to be disassembled to flip and tilt the first protective frame 4 to one side, which can smoothly dump the rocks intercepted and collected inside the frame, reduce the steps of manually entering the protective frame for cleaning, reduce the operational difficulty of underground cleaning operations, and also reduce the safety hazards that may occur during the cleaning process.

[0028] A guide plate 20 is fixedly connected to the outer wall of the second protective frame 6. The guide plate 20 is arranged in a downward inclined structure. This inclined structure can effectively guide the falling rocks inside the second protective frame 6, reduce the accumulation of falling rocks inside the second protective frame 6, make the subsequent rock dumping operation smoother, and help improve the overall efficiency of rock removal. At the same time, the inclined guide plate 20 can also disperse the force of falling rocks hitting the side wall of the second protective frame 6, reduce the local wear caused by direct impact of falling rocks, and help extend the service life of the protective frame.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A protective scaffold for use in underground coal mines, comprising a bottom support (1), a middle support (2), and a top support (3), wherein the bottom support (1) and the top support (3) are fixedly connected by the middle support (2), characterized in that: The top support (3) is provided with a first protective frame (4) and a second protective frame (6). The second protective frame (6) is coaxially located directly above the first protective frame (4). Multiple sets of grooves (8) are opened on the end face of the first protective frame (4) facing the second protective frame (6). Multiple sets of movable rods (9) are fixedly connected to the end face of the second protective frame (6) facing the first protective frame (4). One end of each set of movable rods (9) extends into the interior of a set of grooves (8). A spring (10) is fixedly connected between the end of the movable rod (9) extending into the groove (8) and the bottom of the groove (8).

2. The protective scaffolding for underground coal mines according to claim 1, characterized in that: Each set of grooves (8) has an inner wall with a limiting groove (11) extending along the depth direction of the groove (8), and each set of movable rods (9) has an outer wall integrally formed with a limiting block (12). The limiting block (12) is adapted to the limiting groove (11), and the limiting block (12) is slidably fitted into the limiting groove (11).

3. The protective scaffolding for underground coal mines according to claim 2, characterized in that: An anti-detachment block (13) is fixedly connected at one end of the limiting groove (11) away from the bottom of the groove (8). The inner end face of the anti-detachment block (13) abuts against the outer end face of the limiting block (12). The anti-detachment block (13) is used to axially limit the limiting block (12).

4. The protective scaffolding for underground coal mines according to claim 1, characterized in that: The first protective frame (4) is fixedly covered with a first protective net (5), and the outer periphery of the first protective net (5) is fixedly connected to the inner wall of the first protective frame (4). The second protective frame (6) is fixedly covered with a second protective net (7), and the outer periphery of the second protective net (7) is fixedly connected to the inner wall of the second protective frame (6).

5. The protective scaffolding for underground coal mines according to claim 1, characterized in that: The top support (3) also includes two sets of brackets (14) and a fixing rod (16). The two sets of brackets (14) are symmetrically fixed at the two sides of the lower end face of the first protective frame (4). The two ends of the first protective frame (4) are respectively provided with rotating grooves (15). The fixing rod (16) is horizontally inserted into the rotating groove (15), and both ends of the fixing rod (16) are fixedly connected to the top of the bracket (14) on the corresponding side. A height adjustment component is provided between the bottom end of the bracket (14) and the top end of the middle support (2).

6. The protective scaffolding for underground coal mines according to claim 5, characterized in that: The height adjustment assembly includes a sleeve (17), a rod (18), and a fastener (19). The sleeve (17) is vertically fixed to the top end face of the middle support (2). The rod (18) is vertically fixed to the bottom outer wall of the bracket (14). The lower end of the rod (18) is coaxially inserted into the inner cavity of the sleeve (17). The fastener (19) is threaded through the side wall of the sleeve (17) and passes radially through the outer wall of the rod (18) along the sleeve (17).

7. The protective scaffolding for underground coal mines according to claim 1, characterized in that: A guide plate (20) is fixedly connected to the outer wall of the second protective frame (6), and the guide plate (20) is set in an inclined structure that is tilted downward.

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