Self-adaptive hydraulic support at top of coal seam
By setting multiple independent movable top plates and compression spring structures on the hydraulic support, it can adapt to changes in the shape of the coal seam, solving the support problem of traditional hydraulic supports when the top of the coal seam is uneven, and achieving better support effect and structural reliability.
Patent Information
- Application Number
- CN202423147616.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-19
AI Technical Summary
Traditional hydraulic supports cannot provide adequate support when the top of the coal seam is uneven, leading to deformation and damage of the supports and preventing them from making full contact with the coal seam.
Design an adaptive hydraulic support for the top of a coal seam, employing multiple independent movable roof plates and a compression spring structure, enabling the roof plates to tilt and rotate slightly according to the shape of the coal seam, thereby increasing the contact area.
The increased contact area between the hydraulic support and the coal seam improves the support effect, avoids deformation and damage, and has a simple and reliable structure.
Smart Images
Figure CN223676305U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of mine hydraulic support, concretely to a coal seam top self -adaptation's hydraulic support. BACKGROUND
[0002] Before the coal seam is mined, the stress of coal body is balanced in all directions, and the coal body and the surrounding rock basically keep stable. Due to the mining of the coal seam, the whole coal seam is destroyed, and the original stress balance of the coal body is destroyed. The lower coal seam that has been mined has no support of the coal seam, and its roof will be in a suspended state. Due to its own gravity, the unstable gangue will fall from the top, thereby causing the gangue leakage. In the area where the coal body fissure develops and the roof is broken, the roof leakage is likely to occur, which will cause the unevenness of the coal seam top. The traditional shield hydraulic support is a rigid body during work, and its shape will not change. The roof surface and the bottom always keep parallel. If the top of the coal seam is not parallel to the bottom of the fully-mechanized coal mining face, one of the roof and the bottom of the hydraulic support cannot fully contact with the coal seam, and cannot play a good supporting role. In severe cases, the hydraulic support will be deformed and damaged. Therefore, it is urgent to solve this problem. SUMMARY
[0003] In view of the deficiencies of the prior art, the utility model provides a coal seam top self -adaptation's hydraulic support, which solves the problem that the unevenness of the coal seam top of the fully-mechanized coal mining face causes the hydraulic support to be unable to fully support.
[0004] To solve the above technical problems, the utility model provides the following technical scheme: a coal seam top self -adaptation's hydraulic support, characterized by comprising a base, a push rod connecting head is arranged at the left end of the base, front and rear connecting rods are arranged at the right end of the base, the front and rear connecting rods are rotationally connected with a shield beam through a hinge, a double telescopic hydraulic cylinder is arranged on the base;
[0005] The top of the double telescopic hydraulic cylinder and the front end of the shield beam are rotationally connected with an upper roof through a pin shaft, a balance hydraulic cylinder is arranged at the right lower end of the upper roof, the front end of the balance hydraulic cylinder is rotationally connected with the upper roof, the rear end of the balance hydraulic cylinder is rotationally connected with the shield beam, a guard plate is movably connected with the right end of the upper roof, a guard plate hydraulic cylinder is arranged below the left of the upper roof, the front end of the guard plate hydraulic cylinder is rotationally connected with the guard plate, and the rear end of the guard plate hydraulic cylinder is rotationally connected with the upper roof.
[0006] A rotating hinge is arranged at the middle position of the upper roof and is connected with the hinge below the movable roof, and the movable roof is inclined and rotated in a small range around the rotating hinge, so that an included angle is generated between the upper roof and the movable roof in the vertical direction.
[0007] As a further scheme of the utility model: all the connections are rotational connections.
[0008] As a further scheme of the utility model: four movable top plates are arranged above the upper top plate, and the four movable top plates are not connected correspondingly, so the four movable top plates can rotate around the rotating hinge without interfering with each other, and the four movable top plates rotate independently and do not interfere with each other.
[0009] As a further scheme of the utility model: the movable top plate is internally provided with a rib plate, the rib plate can improve the rigidity and strength of the movable top plate, a rotating hinge is arranged at the middle position of the movable top plate, and a compression spring is arranged at the four corner positions, the compression spring only plays a resetting role on the movable top plate when the hydraulic support does not work, and the compression spring does not affect the inclined rotation of the movable top plate.
[0010] As a further scheme of the utility model: rotating hinges are uniformly distributed at the middle positions of the upper top plate, each rotating hinge is spaced apart by 1m, and the rotating hinges are connected with the hinges of the movable top plate through pin rotation.
[0011] As a further scheme of the utility model: four limiting blocks are arranged at the two sides of the upper top plate, and there are a total of eight limiting blocks, the limiting blocks can prevent the movable top plate from being excessively inclined, avoid excessive extrusion of the compression spring, and cause damage to the compression spring.
[0012] Compared with the prior art, the utility model has the beneficial effects that:
[0013] The utility model retains the structure of the traditional hydraulic support, does not change the original supporting mode, and is provided with four independently movable movable top plates, springs and limiting blocks on the original structure. Since each movable top plate can independently rotate left and right about the center line thereof, the contact area with the coal seam is improved, and the coal seam is better supported.
[0014] In addition, the utility model has simple and reliable design principles and wide application prospects.
[0015] Therefore, compared with the prior art, the utility model has substantial characteristics and progress, and the beneficial effects of the implementation are also obvious. DRAWINGS
[0016] Figure 1 It is a sectional view of the utility model;
[0017] Figure 2 It is a top plate mechanism schematic view of the utility model;
[0018] Figure 3 It is an upper top plate schematic view of the utility model;
[0019] Figure 4 It is a movable plate schematic view of the utility model;
[0020] Figure 5 Partial view of compression spring of the utility model;
[0021] In the figure: 1, push rod connector; 2, base; 3, rear connecting rod; 4, double telescopic hydraulic cylinder; 5, front connecting rod; 6, shield beam; 7, balance hydraulic cylinder; 8, compression spring; 9, movable top plate; 10, upper top plate; 11, guard plate; 12, guard plate hydraulic cylinder; 13, limit block; 14, rotating hinge. DETAILED DESCRIPTION
[0022] In order to facilitate the solution, the utility model embodiment provides a coal seam top adaptive hydraulic support. Below will be combined with the drawings in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, the described embodiment is only a part of the utility model embodiment, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor are within the scope of the utility model protection.
[0023] Embodiment, such as Figure 1 The utility model provides a coal seam top adaptive hydraulic support, including base 2, the left end of base 2 is provided with push rod connector 1, and the right end is provided with front connecting rod 5 and rear connecting rod 3, and the front and rear connecting rod 5, 3 are rotatably connected with shield beam 6 through hinge, and double telescopic hydraulic cylinder 4 is arranged on the base, the top of double telescopic hydraulic cylinder 4 and the front end of shield beam 6 are rotatably connected with upper top plate 10 through pin shaft, the lower right end of upper top plate 10 is provided with balance hydraulic cylinder 7, and the front end of balance hydraulic cylinder 7 is rotatably connected with upper top plate 10, the rear end of balance hydraulic cylinder 7 is rotatably connected with shield beam 6, and the right end of upper top plate 10 is movably connected with guard plate 11, the lower left of upper top plate 10 is provided with guard plate hydraulic cylinder 12, the front end of guard plate hydraulic cylinder 12 is rotatably connected with guard plate 11, and the rear end is rotatably connected with upper top plate 10, the middle position of upper top plate 10 is provided with rotating hinge 14 and is connected with movable top plate 9, and the lower of each movable top plate 9 is provided with compression spring, and upper top plate 10 is provided with limit block 13.
[0024] As Figures 1 to 5As shown, all the connections are rotary connections. Four movable top plates 9 are arranged above the upper top plate 10, each movable top plate 9 can independently tilt and rotate, when the top of the coal seam is uneven, the movable top plate 9 can tilt to adapt to the shape of the coal seam; the movable top plate 9 is internally provided with a rib plate, which can improve the rigidity and strength of the movable top plate 9, a rotary hinge 14 is arranged at the middle position of the movable top plate 9, and a compression spring 8 is arranged at the four corner positions; four limiting blocks 13 are arranged on both sides of the upper top plate 10, a total of eight, the limiting block 13 can prevent the movable top plate 9 from tilting too much, avoid excessive extrusion of the compression spring 8, and cause damage to the compression spring 8;
[0025] When the hydraulic support moves to the specified position, the double telescopic hydraulic cylinder 4 and the balance hydraulic cylinder 7 start to move, the upper top plate 10 is lifted, and the movable top plate 9 is driven by the upper top plate 10 to move upwards, when the movable top plate 9 contacts the top of the coal seam (directly top), because the directly top is not absolutely flat, there will be protruding or recessed coal seam shape and the directly top and the floor are not absolutely parallel, when the hydraulic support is lifted, the above two conditions occur, at this time, each movable top plate 9 can produce a tilt angle when contacting the directly top, to adapt to the shape of the directly top and the position relationship between the directly top and the floor, to improve the contact area with the coal seam, the tilt angle is the included angle between the upper top plate 10 and the movable top plate 9 in the vertical direction.
[0026] It is obvious for those skilled in the art that the present application is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.
[0027] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.
Claims
1. A hydraulic support with adaptive roof for coal seams, characterized in that, It includes base (2), the left end of base (2) is provided with push rod connector (1), the right end is provided with front connecting rod (5) and rear connecting rod (3), and front and rear connecting rod (5, 3) is rotatably connected with shelter beam through hinge, and double telescopic hydraulic cylinder (4) is arranged on base (2); The top of the double telescopic hydraulic cylinder (4) and the front end of the shelter beam (6) are rotatably connected with the upper top plate (10) through a pin shaft, the lower right end of the upper top plate (10) is provided with a balance hydraulic cylinder (7), the front end of the balance hydraulic cylinder (7) is rotatably connected with the upper top plate (10), the rear end of the balance hydraulic cylinder (7) is rotatably connected with the shelter beam (6), the right end of the upper top plate (10) is movably connected with the guard plate (11), the lower left of the upper top plate (10) is provided with a guard plate hydraulic cylinder (12), the front end of the guard plate hydraulic cylinder (12) is rotatably connected with the guard plate (11), and the rear end of the guard plate hydraulic cylinder (12) is rotatably connected with the upper top plate (10). The upper top plate (10) is provided with a rotating hinge (14) at the middle position and is connected with the movable top plate (9), each movable top plate (9) is provided with a compression spring (8) below, and the upper top plate (10) is provided with a limiting block (13).
2. The hydraulic support with self-adaption to the roof of coal seam according to claim 1, characterized in that, All the connections are rotary connections.
3. The hydraulic support with self-adaption to the top of coal seam according to claim 1, characterized in that, There are a total of 4 movable top plates (9) above the upper top plate (10), and each movable top plate (9) can independently tilt and rotate.
4. The hydraulic support with self-adaption to the roof of coal seam according to claim 1, characterized in that, The upper top plate (10) is uniformly distributed with rotating hinges (14) at the middle position, and each rotating hinge (14) is spaced 1m apart.
5. The hydraulic support with self-adaption to the roof of coal seam according to claim 1, characterized in that, The upper top plate (10) is provided with 4 limiting blocks (13) on both sides, a total of 8.