Self-moving hydraulic support withdrawing equipment

Abstract

The utility model relates to the technical field of hydraulic support withdrawing of a fully mechanized coal mining face of a coal mine, and particularly discloses self-moving hydraulic support withdrawing equipment which comprises a lower flat plate assembly, the upper surface of the lower flat plate assembly is movably connected with an upper flat plate assembly, and one side of the upper surface of the upper flat plate assembly is movably connected with a primary drawing jack. The other side of the upper surface of the upper flat plate assembly is movably connected with a secondary drawing jack, the left and right sides of the upper surface of the lower flat plate assembly are movably connected with guide jacks, and the left and right sides of the upper surfaces of the lower flat plate assembly and the upper flat plate assembly are movably connected with pushing jacks. The flat plate assemblies are provided with the internal slide ways, the upper flat plate assembly achieves sliding self-moving of the upper flat plate assembly and the lower flat plate assembly through the slide ways by pushing the jacks to stretch out and draw back, the first-stage drawing jack and the second-stage drawing jack drive the chain and the guiding jack to guide, and the drawing action and the direction adjusting action of the hydraulic support are achieved. And finally, the hydraulic support is withdrawn to the upper flat plate assembly.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic support retraction technology in coal mine fully mechanized mining faces, specifically a self-moving hydraulic support retraction device. Background Technology

[0002] In recent years, the development and upgrading of fully mechanized coal mining machinery has been rapid. In fully mechanized coal mining faces, hydraulic supports are key equipment for maintaining the safety of the mining space and supporting the roof. As mining progresses, when the working face is mined to a certain extent, it is necessary to withdraw the hydraulic supports to facilitate work such as relocation of the working face or equipment upgrades.

[0003] However, the development of hydraulic support retraction technology has been relatively slow. Retraction of hydraulic supports is difficult, characterized by high labor intensity and low automation. Furthermore, traditional hydraulic support retraction methods typically rely on manual operation and simple auxiliary tools, which have many drawbacks. For example, manual retraction is inefficient, consuming significant manpower and time, and involving high labor intensity for workers. Simultaneously, because the retraction process requires operation with the roof exposed, the safety risks are high, with the potential for roof collapse, support toppling, and other accidents, threatening the lives of workers. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a self-moving hydraulic support retraction device to solve the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a self-moving hydraulic support retraction device, comprising a lower plate assembly, an upper plate assembly movably connected to the upper surface of the lower plate assembly, a primary pull-out jack movably connected to one side of the upper surface of the upper plate assembly, a secondary pull-out jack movably connected to the other side of the upper surface of the upper plate assembly, guide jacks movably connected to the left and right sides of the upper surface of the lower plate assembly, push jacks movably connected to the left and right sides of the upper surfaces of the lower and upper plate assemblies, a retraction bracket fixed to the upper surface of the lower plate assembly, a waiting retraction bracket fixed to one side of the upper plate assembly, and a rear protective bracket fixed to the upper surface of the lower plate assembly.

[0006] Preferably, the lower plate assembly has a concave slide rail inside, the upper plate assembly has a convex slide rail inside, and the upper surfaces of the lower plate assembly and the upper plate assembly are provided with guide chain grooves. The upper surface of the lower plate assembly is provided with one set of guide chain grooves, while the upper surface of the upper plate assembly is provided with three sets of guide chain grooves.

[0007] Preferably, a connecting block is provided on one side of each of the primary pull-out jack, the secondary pull-out jack, the guide jack, and the push jack, and a movable block is rotatably connected inside the connecting block.

[0008] Preferably, the outer walls of the primary pull-out jack, the secondary pull-out jack, the guide jack, and the push jack are provided with a fixed arc ring, and the fixed arc ring is connected to the upper surface of the lower plate assembly and the upper plate assembly. The interior of the fixed arc ring is movably connected with a first fixing bolt.

[0009] Preferably, a mounting plate is fixedly connected to one side wall of the upper plate assembly, and the mounting plate is connected to the lower plate assembly. A second fixing bolt is movably connected inside the mounting plate. Both the lower plate assembly and the upper plate assembly have through holes inside, and a splicing groove is formed on one side wall of the through hole.

[0010] Beneficial effects

[0011] This invention provides a self-moving hydraulic support retraction device. Compared with the prior art, it has the following advantages:

[0012] (1) The upper plate assembly is equipped with an internal slide rail. The upper plate assembly slides through the slide rail and the extension and retraction of the push jacks realize the sliding and self-movement of the upper and lower plate assemblies. The chain is driven by the first-stage and second-stage pull-out jacks, and the guide jacks guide the hydraulic support to realize the pulling and reversing actions. Finally, the hydraulic support is retracted to the upper plate assembly. The hydraulic support retraction process is completed by the monorail crane in the retraction roadway. Currently, there is no dedicated retraction equipment for this hydraulic support retraction process. It is basically done by manual operation of the winch and hydraulic unit in the roadway to complete the pulling and reversing work of the hydraulic support. This equipment realizes the automated pulling and reversing work of the hydraulic support through mechanical and hydraulic cylinder equipment. The subsequent transportation is carried out by the monorail crane system, realizing the automation of the hydraulic support retraction process, reducing labor intensity, improving efficiency, and reducing safety risks. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall left view of an embodiment of the present invention;

[0014] Figure 2 This is a schematic diagram of the overall right view of an embodiment of the present invention;

[0015] Figure 3 This is a top view schematic diagram of an embodiment of the present invention.

[0016] In the diagram: 1. Lower plate assembly; 2. Upper plate assembly; 3. First-stage pull-out jack; 4. Second-stage pull-out jack; 5. Guide jack; 6. Push jack; 7. Retraction bracket; 8. Waiting-to-retract bracket; 9. Rear protective bracket; 10. Concave slide rail; 11. Convex slide rail; 12. Guide chain groove; 13. Connecting block; 14. Movable block; 15. Fixed arc ring; 16. First fixing bolt; 17. Mounting plate; 18. Second fixing bolt; 19. Through hole; 20. Splicing groove. Detailed Implementation

[0017] 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.

[0018] Example 1:

[0019] Please see Figure 1-3As shown, this embodiment proposes a self-moving hydraulic support retraction device, including a lower plate assembly 1. An upper plate assembly 2 is movably connected to the upper surface of the lower plate assembly 1. A primary pull-out jack 3 is movably connected to one side of the upper surface of the upper plate assembly 2, and a secondary pull-out jack 4 is movably connected to the other side of the upper surface of the upper plate assembly 2. Guide jacks 5 are movably connected to the left and right sides of the upper surface of the lower plate assembly 1. Push jacks 6 are movably connected to the left and right sides of the upper surfaces of the lower plate assembly 1 and the upper plate assembly 2. A retraction bracket 7 is fixed to the upper surface of the lower plate assembly 1. A waiting retraction bracket 8 is fixed to one side of the upper plate assembly 2. A rear protective bracket 9 is fixed to the upper surface of the lower plate assembly 1. The upper plate assembly 2 is movably connected to the upper surface of the lower plate assembly 1. This movable connection method allows the upper plate assembly 2 to move to a certain extent relative to the lower plate assembly 1, providing a basic movable structure for subsequent jack pushing, pulling, and other actions. For example, during the support retraction process, the upper plate assembly 2 can move forward or backward as needed to coordinate with the hydraulic support retraction operation. Secondly, the primary pull-out jack 3 and the secondary pull-out jack 4 are movably connected to both sides of the upper surface of the upper plate assembly 2. Their function is to pull the hydraulic support through telescopic movements during hydraulic support retraction, gradually disengaging it from its original installation position and moving it to the designated retraction position. The primary pull-out jack 3 and the secondary pull-out jack 4 have different strokes and pulling forces to adapt to the retraction requirements of hydraulic supports of different specifications and weights. The coordinated operation of the two components allows for more precise and efficient pulling actions. The guide jack 5, connected to the left and right sides of the upper surface of the lower plate assembly 1, primarily guides the upper plate assembly 2, the waiting-to-retract bracket 8 mounted on it, and the hydraulic support during the hydraulic support retraction process. This ensures they move linearly along a predetermined direction, preventing deviation or swaying, thus guaranteeing the stability and accuracy of the retraction operation. The push jack 6, connected to the left and right sides of the upper surfaces of the lower plate assembly 1 and upper plate assembly 2, pushes the upper plate assembly 2 and its related components when needed, causing horizontal displacement to assist the pull jack in completing the hydraulic support retraction action. The hydraulic jacks 6 and 7 can be used to adjust the position of the support or perform auxiliary operations. By pushing the jacks 6, the support can better adapt to different working conditions and space requirements during retraction. The retraction support 7 is fixed to the upper surface of the lower plate assembly 1 to fix and support the hydraulic support to be retracted, providing a stable support point so that it maintains the correct posture and position during retraction. The waiting retraction support 8 is fixed to one side of the upper plate assembly 2 and can be used to temporarily place the hydraulic support to be retracted, serving as a transition and temporary storage, facilitating subsequent pulling and handling operations. The rear protective support 9 is fixed to the upper surface of the lower plate assembly 1, mainly to protect the rear of the equipment and the operators during the retraction operation.To prevent potential roof falls, rockfalls, or other hazards from injuring equipment and personnel, and to ensure the safe conduct of the withdrawal operation.

[0020] Preferably, the lower plate assembly 1 has a concave slide rail 10 inside, and the upper plate assembly 2 has a convex slide rail 11 inside. Guide chain grooves 12 are provided on the upper surfaces of both the lower and upper plate assemblies 1 and 2. The lower plate assembly 1 has one set of guide chain grooves 12, while the upper plate assembly 2 has three sets of guide chain grooves 12. The concave slide rail 10 inside the lower plate assembly 1 and the convex slide rail 11 inside the upper plate assembly 2 are mutually compatible. During operation, the convex slide rail 11 engages with the concave slide rail 10, providing precise guidance for the movement of the upper plate assembly 2 relative to the lower plate assembly 1. Furthermore, the concave-convex slide rail design reduces the friction area between the upper plate assembly 2 and the lower plate assembly 1, effectively reducing friction compared to planar contact. This not only makes the movement of the upper plate assembly 2 smoother and reduces energy consumption but also extends the service life of the equipment.

[0021] Preferably, each of the primary pull-out jack 3, the secondary pull-out jack 4, the guide jack 5, and the push jack 6 is provided with a connecting block 13 on one side. The connecting block 13 is rotatably connected to a movable block 14. During the installation of the equipment, the design of the connecting block 13 and the movable block 14 makes it easier to connect the jacks to other components. The workers do not need to precisely align the angles of the jacks and connecting components. They only need to make a preliminary connection between the movable block 14 and the corresponding connection point, and then adjust it to the appropriate angle by rotating the movable block 14 before fixing it. This greatly simplifies the installation steps, improves the installation efficiency, and shortens the installation cycle of the equipment.

[0022] Preferably, the outer walls of the primary pull-out jack 3, the secondary pull-out jack 4, the guide jack 5, and the pushing jack 6 are provided with fixing arc-shaped rings 15, which are connected to the upper surfaces of the lower plate assembly 1 and the upper plate assembly 2. A first fixing bolt 16 is movably connected inside the fixing arc-shaped ring 15. The fixing arc-shaped ring 15, connected to the upper surfaces of the lower plate assembly 1 and the upper plate assembly 2, surrounds the outer walls of the primary pull-out jack 3, the secondary pull-out jack 4, the guide jack 5, and the pushing jack 6, providing stable support and fixation for the jacks. When the jacks are working, they generate significant thrust or pull. If the fixing is not secure, the jacks may shift or shake, affecting their working effect and the stability of the equipment. The fixing arc-shaped rings 15 firmly fix the jacks in their respective positions, ensuring stability during operation and enabling the jacks to accurately apply force to the hydraulic support, thus ensuring the smooth retraction of the hydraulic support. Secondly, the first fixing bolt 16, which is movable inside the fixed arc ring 15, makes the installation and disassembly of the jack more convenient. When installing the jack, the worker only needs to place the jack in a suitable position, and then use the first fixing bolt 16 to pass through the corresponding holes on the fixed arc ring 15 and the outer wall of the jack, and tighten the bolt to complete the fixation. When disassembling, the first fixing bolt 16 can be loosened to easily remove the jack from the fixed arc ring 15. This design greatly saves the time and labor costs of installing and disassembling the jack, and improves the maintenance efficiency of the equipment. Moreover, since the fixed arc ring 15 is connected to the outer wall of the jack through the first fixing bolt 16, this connection method has a certain degree of flexibility. For different sizes of primary pull-out jacks 3, secondary pull-out jacks 4, guide jacks 5 and push-moving jacks 6, the position of the first fixing bolt 16 can be adjusted or different specifications of the fixed arc ring 15 can be replaced to adapt to the size changes of the jack.

[0023] Preferably, a mounting plate 17 is fixedly connected to one side wall of the upper plate assembly 2, and the mounting plate 17 is connected to the lower plate assembly 1. A second fixing bolt 18 is movably connected inside the mounting plate 17. Both the lower plate assembly 1 and the upper plate assembly 2 have through holes 19 inside, and a splicing groove 20 is opened on one side wall of the through hole 19. The mounting plate 17 fixed to one side wall of the upper plate assembly 2 is connected to the lower plate assembly 1 and is fastened by the second fixing bolt 18 movably connected inside the mounting plate 17, so that the upper plate assembly 2 and the lower plate assembly 1 can be stably combined together. Furthermore, the design of the second fixing bolt 18 makes the installation and disassembly of the upper plate assembly 2 and the lower plate assembly 1 relatively simple. During the equipment installation process, the operator can first roughly align the upper plate assembly 2 and the lower plate assembly 1, and then use the mounting plate 18 to fix them together. The connection is completed by inserting the second fixing bolt 18 into the through hole 19 on 17 and tightening it. When the equipment needs to be repaired, transported or adjusted, the second fixing bolt 18 can be loosened to easily separate the upper and lower plate components 1, which facilitates the maintenance and handling of the equipment, reduces the difficulty of equipment installation and maintenance, and improves work efficiency. The through holes 19 and splicing grooves 20 provided inside the lower plate component 1 and the upper plate component 2 play a positioning and guiding role in the connection process. The through holes 19 can accurately align the upper plate component 2 and the lower plate component 1, ensuring that the second fixing bolt 18 can pass through smoothly and achieve a precise connection. The presence of the splicing groove 20 further enhances the tightness and reliability of the connection, so that the upper plate component 2 and the lower plate component 1 can work together better after connection.

[0024] In use, the first-stage pull-out jack 3, connected by a chain, pulls the hydraulic support to the lower plate assembly 1. The second-stage pull-out jack 4 and guide jack 5 adjust the hydraulic support to 90°. The second-stage pull-out jack 4 then pulls the hydraulic support to the upper plate assembly 2. The hydraulic support is then withdrawn by a monorail crane in the retraction tunnel. The lower plate assembly 1 is equipped with an internal concave slide rail 10, and the upper plate assembly 2 is equipped with a convex slide rail 11. The sliding movement of the upper plate assembly 2 and the lower plate assembly 1 is achieved by the extension and retraction of the push-pull jack 6 through the slide rails.

[0025] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A self-moving hydraulic support retraction device, comprising a lower flat plate assembly (1), the upper surface of the lower flat plate assembly (1) is movably connected with an upper flat plate assembly (2), characterized in that: The upper surface of the upper flat plate assembly (2) is movably connected with a first pulling jack (3), the other side of the upper surface of the upper flat plate assembly (2) is movably connected with a second pulling jack (4), the left and right sides of the upper surface of the lower flat plate assembly (1) are movably connected with guide jacks (5), the left and right sides of the upper surfaces of the lower flat plate assembly (1) and the upper flat plate assembly (2) are movably connected with pushing jacks (6), the upper surface of the lower flat plate assembly (1) is fixedly connected with a retracting support (7), one side of the upper flat plate assembly (2) is fixedly connected with a waiting retracting support (8), and the upper surface of the lower flat plate assembly (1) is fixedly connected with a rear protective support (9).

2. The self-moving hydraulic support retraction device according to claim 1, characterized in that: The inside of the lower flat plate assembly (1) is provided with a concave slide (10), the inside of the upper flat plate assembly (2) is provided with a convex slide (11), the upper surfaces of the lower flat plate assembly (1) and the upper flat plate assembly (2) are provided with guide chain grooves (12), the upper surface of the lower flat plate assembly (1) is provided with a group of guide chain grooves (12), and the upper surface of the upper flat plate assembly (2) is provided with three groups of guide chain grooves (12).

3. The self-moving hydraulic support retraction device according to claim 1, characterized in that: One side of the first pulling jack (3), the second pulling jack (4), the guide jack (5) and the pushing jack (6) is provided with a connecting block (13), and the inside of the connecting block (13) is rotatably connected with a movable block (14).

4. The self-moving hydraulic support retraction device according to claim 1, characterized in that: The outer wall of the first pulling jack (3), the second pulling jack (4), the guide jack (5) and the pushing jack (6) is provided with a fixed arc-shaped ring (15), the fixed arc-shaped ring (15) is connected with the upper surfaces of the lower flat plate assembly (1) and the upper flat plate assembly (2), and the inside of the fixed arc-shaped ring (15) is movably connected with a first fixed bolt (16).

5. The self-moving hydraulic support retraction device according to claim 1, characterized in that: One side wall of the upper flat plate assembly (2) is fixedly connected with a mounting plate (17), the mounting plate (17) is connected with the lower flat plate assembly (1), the inside of the mounting plate (17) is movably connected with a second fixed bolt (18), the inside of the lower flat plate assembly (1) and the upper flat plate assembly (2) is provided with a through hole (19), and one side wall of the through hole (19) is provided with a splicing groove (20).

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