A shield support suitable for three-soft coal seam withdrawal

Abstract

This utility model relates to the field of mine pressure and safety control technology, and discloses a shield support suitable for retreat in soft coal seams. It includes at least two sets of hydraulic supports arranged closely adjacent to each other in a left-right direction, and an adjustment mechanism connecting the adjacent hydraulic supports and allowing them to stagger. Each hydraulic support includes a top beam, a shield beam connected to the top beam, and a base body connected to both the top beam and the shield beam. The adjustment mechanism is mounted on the base body. A pushing component is provided at the front end of the base body, and all base bodies are connected to the same pushing component. This utility model ensures the stability and safety of the hydraulic supports during their stepping and joint movement by installing adjusting jacks on the three sets of parallel hydraulic supports that can connect two adjacent hydraulic support units.

Description

Technical Field

[0001] This utility model relates to the field of mine pressure and safety control technology, specifically to a shield support suitable for retreating from soft coal seams. Background Technology

[0002] "Soft" coal seams constitute a large proportion of my country's coal production. Currently, the integrated mechanized mining of these seams presents significant challenges, including both mining difficulties and the difficulty of retracting support mechanisms. The rapid retraction of hydraulic supports is a crucial step in the relocation of equipment in fully mechanized coal mining faces, directly impacting relocation efficiency and mine production continuity. To improve relocation efficiency, combined self-moving hydraulic supports have been designed, such as the Chinese utility model patent titled "Combined Self-Moving Device for Hydraulic Supports" (document number CN204267069U). While this solution can achieve combined self-movement, its safety is insufficient because the three hydraulic supports move relatively independently, posing a risk of tipping over if a single support moves. Therefore, a safer retraction shield support is needed. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a shield support suitable for the retreat of three soft coal seams. By setting adjustment jacks on three sets of hydraulic supports in parallel, which can connect two adjacent hydraulic support units, the stability and safety of the hydraulic support stepping and moving process are guaranteed.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a shield support suitable for retreating from three soft coal seams, comprising at least two sets of hydraulic supports arranged closely adjacent to each other in the left-right direction, and an adjustment mechanism connecting the adjacent hydraulic supports and enabling them to stagger back and forth. The hydraulic support includes a top beam, a shield beam connected to the top beam, and a base body connected to both the top beam and the shield beam. The adjustment mechanism is located on the base body; a pushing component is provided at the front end of the base body, and all base bodies are connected to the same pushing component.

[0005] Furthermore, a gap is provided between adjacent hydraulic supports.

[0006] Furthermore, initially, the front and rear ends of all hydraulic supports are flush.

[0007] Furthermore, the adjustment mechanism includes a connecting seat fixed on the base body, and an adjustment frame jack whose two ends are respectively horizontally rotatably connected to the adjacent connecting seats.

[0008] Furthermore, a pushing jack or rotating component is provided between the base body and the pushing assembly to connect the two.

[0009] Furthermore, at least two base bodies are equipped with push jacks, which are arranged in the front-to-back direction, and the telescopic parts of the push jacks are connected to the push assembly.

[0010] Furthermore, when using three or more hydraulic supports, at least the leftmost and rightmost base bodies are equipped with push jacks.

[0011] Furthermore, the rotating component includes a connecting plate fixed to the base body, and a fixed seat fixed to the pushing assembly and rotatably connected to the connecting plate.

[0012] Furthermore, a set of anti-overturning structures is provided on the left side of the leftmost top beam and on the right side of the rightmost top beam; the anti-overturning structure includes a side-tilting plate that is rotatably connected to the top beam, and a side-tilting jack that is rotatably connected to the side-tilting plate at one end and connected to the top beam at the other end.

[0013] The beneficial effects of this utility model are: by setting adjustment jacks on three sets of parallel hydraulic supports that can connect two adjacent hydraulic support units, the stability and safety of the hydraulic support units during the stepping and joint movement process are ensured; the adjustment jacks also have the function of adjusting the direction of movement, preventing the direction of each hydraulic support unit from deviating when moving; and by setting a side protection structure, the stability of a single hydraulic support unit during movement is further improved by expanding the support area. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure; Figure 2 This is a schematic diagram of the rear view structure; Figure 3 This is a schematic diagram of the left-view structure; Figure 4 This is a top view of the base structure.

[0015] In the diagram: 1. Left top beam; 2. Middle top beam; 3. Right top beam; 4. Protective beam; 5. Front connecting rod; 6. Rear connecting rod; 7. Base body; 8. Pushing assembly; 9. Column; 10. Pushing jack; 11. Adjusting jack; 12. First connecting seat; 13. Second connecting seat; 14. Third connecting seat. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings and specific 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model and are not an absolute limitation on the actual use.

[0018] Example: like Figures 1-4 As shown, a shield support suitable for retreating from three soft coal seams includes at least two sets of hydraulic supports arranged closely adjacent to each other in the left-right direction, and an adjustment mechanism that connects the adjacent hydraulic supports and allows the two adjacent sets of hydraulic supports to be staggered back and forth. In this embodiment, three sets of hydraulic supports are used. Each hydraulic support includes a top beam at the front end, a shield beam 4 at the rear end and connected to the top beam, and a base 7 connected to both the top beam and the shield beam 4. At least one column 9 connected to the top beam is provided on the base 7, and at least one connecting rod connected to the shield beam 4 is provided at the rear of the base 7. Among the top beams of the three sets of hydraulic supports, the left top beam 1 is located on the left, the middle top beam 2 is located in the middle, and the right top beam 3 is located on the right. In this embodiment, each set of hydraulic supports includes two columns 9 arranged along the front and rear. It also includes two connecting rods arranged along the front and rear, namely the front connecting rod 5 and the rear connecting rod 6. The adjustment mechanism is set on the base body 7; a push component 8 is set at the front end of the base body 7, and all base bodies 7 are connected to the same push component 8.

[0019] like Figure 2 The orientation shown is the rear side, then the side of its top beam 1 is the front side, the front-back direction is also longitudinal, and the left-right direction is also transverse.

[0020] There is a gap between adjacent hydraulic supports. The gap is usually small to prevent the top coal seam or gangue from falling through the gap. However, setting the gap is necessary to prevent the three sets of hydraulic supports from rubbing against each other when they move separately.

[0021] Initially, the front and rear ends of all hydraulic supports are aligned. Generally, hydraulic supports of the same model and size are selected. In special cases, hydraulic supports of different models and sizes can also be selected.

[0022] The adjustment mechanism includes a connecting seat fixed on the base body 7, and a jack 11 with both ends horizontally rotatably connected to the adjacent connecting seats; ensuring the stability of the support and having a directional adjustment function; when three sets of hydraulic supports are used, the connecting seat on the hydraulic support on the right is the first connecting seat 12, the connecting seat in the middle is the second connecting seat 13, and the connecting seat on the left is the third connecting seat 14.

[0023] like Figure 2 and Figure 4As shown, the second connecting seat 13 is provided with two pull rings, and each end of the two adjusting jacks 11 is also provided with a pull ring. One end of the two adjusting jacks 11 is rotatably connected to the corresponding connecting seat through the pull ring, and the other end is pulled to the corresponding pull ring provided on the second connecting seat 13 through its pull ring. This allows the two adjusting jacks to rotate horizontally.

[0024] Each base body 7 and the pushing assembly 8 are connected by a pushing jack 10 or a rotating component; the pushing jack 10 has a stroke of 900mm, ensuring that the hydraulic support can move 900mm in one step.

[0025] At least two base bodies 7 are provided with push jacks 10, which are arranged in the front-to-back direction. The telescopic component of the push jack 10 is connected to the push assembly 8. The push jack 10 includes a cylinder seat and a telescopic component that is slidably connected to the cylinder seat. The cylinder seat is fixed on the base body 7.

[0026] When three or more hydraulic supports are used, at least the leftmost and rightmost base bodies 7 are equipped with push jacks 10.

[0027] The rotating component includes a connecting plate fixed to the base body 7 and a fixed seat fixed to the pushing assembly 8 and rotatably connected to the connecting plate; through the rotating component, the pushing assembly 8 can rotate relative to the base body 7 into the vertical plane.

[0028] A set of anti-tipping structures is set on the left side of the leftmost top beam and the right side of the rightmost top beam. The anti-tipping structure includes a side-tilting plate that is rotatably connected to the top beam, and a side-tilting jack that is rotatably connected to the side-tilting plate at one end and to the top beam at the other end. All components are connected by pins. The side-tilting plate can be rotated by retracting the side-tilting jack, which facilitates support and protection.

[0029] Working Process: The intermediate hydraulic support is lowered by retracting column 9. By controlling the two side push jacks 10, the intermediate unit shield hydraulic support moves forward. During this movement, the adjusting jack 11 extends and rotates horizontally. Then, the intermediate unit shield hydraulic support extends through column 9 to support the right-side unit shield hydraulic support. The left-side unit shield hydraulic support lowers, and by controlling the push jacks 10, it moves forward. The adjusting jack 11 provides orientation and anti-tipping functions. This process is repeated to complete the movement of the right-side unit shield hydraulic support. This constitutes one cycle of self-movement, and the operation is repeated continuously. This solution enables rapid retraction and safe support of the coal mine working face, improving safety performance.

[0030] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A shield support suitable for retreating from soft coal seams, characterized in that: It includes at least two sets of hydraulic supports arranged closely adjacent to each other in the left-right direction, and an adjustment mechanism that connects the adjacent hydraulic supports and allows them to be staggered back and forth; The hydraulic support includes a top beam, a shield beam (4) connected to the top beam, and a base body (7) connected to the top beam and the shield beam (4) respectively. The adjustment mechanism is mounted on the base body (7); a pushing component (8) is provided at the front end of the base body (7), and all base bodies (7) are connected to the same pushing component (8).

2. A shield support for retreating from soft coal seams according to claim 1, characterized in that: A gap is provided between adjacent hydraulic supports.

3. A shield support for retreating from soft coal seams according to claim 1, characterized in that: Initially, the front and rear ends of all the hydraulic supports are flush.

4. A shield support for retreating from soft coal seams according to claim 1, characterized in that: The adjustment mechanism includes a connecting seat fixed on the base body (7) and an adjustment frame jack (11) whose two ends are respectively horizontally rotatably connected to the adjacent connecting seats.

5. A shield support for retreating from soft coal seams according to claim 1, characterized in that: The base body (7) and the pushing assembly (8) are connected by a pushing jack (10) or a rotating component.

6. A shield support for retreating from three soft coal seams according to claim 5, characterized in that: At least two base bodies (7) are provided with push jacks (10), which are arranged in the front-to-back direction, and the telescopic components of the push jacks (10) are connected to the push assembly (8).

7. A shield support for retreating from a soft coal seam according to claim 5 or 6, characterized in that: When three or more hydraulic supports are used, at least the leftmost and rightmost base bodies (7) are equipped with push jacks (10).

8. A shield support for retreating from a soft coal seam according to claim 5, characterized in that: The rotating component includes a connecting plate fixed to the base body (7) and a fixed seat fixed to the pushing assembly (8) and rotatably connected to the connecting plate.

9. A shield support for retreating from a soft coal seam according to claim 1, characterized in that: A set of anti-tipping structures is provided on the left side of the leftmost top beam and on the right side of the rightmost top beam; the anti-tipping structure includes a side-tilting plate rotatably connected to the top beam, and a side-tilting jack with one end rotatably connected to the side-tilting plate and the other end connected to the top beam.

Images