Hydraulic support for ultra-thin coal seam

Abstract

The utility model relates to the technical field of hydraulic supports, in particular to a hydraulic support for an ultra-thin coal seam. Comprising a top plate and a bottom plate which are vertically and fixedly connected through a central hydraulic cylinder, inclined supporting barrels are symmetrically arranged on the left side and the right side of the hydraulic cylinder, the bottoms of the supporting barrels are rotationally connected to a bottom support on the bottom plate, a supporting rod capable of freely stretching out and drawing back is installed in each supporting barrel, and the bottoms of the supporting rods are located in cylindrical cavities of the supporting barrels; the top of the supporting rod is rotationally connected with a top support at the bottom of the top plate, and an auxiliary supporting device for inclined supporting is arranged on the outer side of the bottom of each supporting cylinder. A dustproof barrel is arranged on the outer side of a hydraulic rod on the top of the hydraulic cylinder. The hydraulic cylinder in the center is supported in an auxiliary mode through the double inclined rods, the overall stress load is shared, and the stability is guaranteed through the triangular cooperative telescopic fixing structure; and a dustproof barrel is arranged on the outer side of the hydraulic rod, so that invasion of pulverized coal can be effectively reduced, and the service life of the hydraulic rod is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to technical field of hydraulic support, especially relates to a hydraulic support for extremely thin coal seam. BACKGROUND

[0002] Coal mines are divided into thin coal seams, medium thick coal seams and thick coal seams, thin coal seams are mainly coal seams with a thickness of less than 1.3 meters when underground mining and a thickness of less than 3.5 meters when open-pit mining, and extremely thin coal seams refer to coal seams with a thickness of less than 0.8 meters. The mining of such coal seams is affected by limited mining space, which brings inconvenience to the movement of mining equipment and workers.

[0003] The hydraulic support mining method refers to using a hydraulic support to replace a traditional wooden support to improve the stability and safety of the working face. The hydraulic support has the advantages of good adjustability and large carrying capacity and can adapt to the mining needs of different coal seams. Conventional hydraulic supports are generally used for large equipment and are usually used for large mining equipment to open up a path.

[0004] In the mining of extremely thin coal seams, there are often extremely small and narrow coal mine tunnels and roadways, and artificial excavation is still needed, at which time a relatively small hydraulic support needs to be used in cooperation, and large hydraulic supports cannot be transported into the coal mine tunnels, and forcibly using them may even cause the risk of the overall collapse of the coal mine tunnels.

[0005] Therefore, there is an urgent need for a hydraulic support suitable for the extremely narrow and dusty environment of small roadways in coal mine tunnels to increase the support load while reducing costs. UTILITY MODEL CONTENTS

[0006] The utility model discloses in order to make up for the deficiency in the prior art, realize foregoing function, provide a kind of hydraulic support for extremely thin coal seam.

[0007] The utility model discloses the following technical schemes are realized:

[0008] A kind of hydraulic support for extremely thin coal seam, including the top plate and bottom plate fixedly connected by the hydraulic cylinder in the center, the left and right sides of the hydraulic cylinder are symmetrically provided with the support cylinder of inclination, support cylinder bottom is rotatably connected on the bottom support of bottom plate, each support cylinder is installed with the support rod that can freely retract, the support rod bottom is in the cylindrical cavity of support cylinder, support rod top and the top support of top plate bottom rotatably connect, the bottom outside of each support cylinder is provided with the auxiliary support device of inclination support;

[0009] The outer side of the hydraulic rod of the hydraulic cylinder top is provided with dustproof cylinder, the dustproof cylinder top and the lower end surface of top plate abut, and the bottom of dustproof cylinder is lower than the upper end surface of the cylinder body of hydraulic cylinder.

[0010] Further, the bottom of the support cylinder is close to the hydraulic cylinder, and the cylinder body is a quadrangular prism, and the two support cylinders are inverted "8" shaped;

[0011] The auxiliary support device comprises an inclined cylinder top base fixed on the side wall of the support cylinder away from the hydraulic cylinder, and an inclined cylinder support rod in rotation connection with the inclined cylinder top base, wherein the inclined cylinder support rod is in the cylinder cavity of the lower inclined support cylinder and can be freely extended and retracted, and the bottom of the inclined support cylinder is in rotation connection with the inclined cylinder bottom base.

[0012] Further, a plurality of front and rear penetrating threaded holes are arranged at the upper ports of the support cylinder and the inclined support cylinder;

[0013] When the hydraulic rod is lifted to the highest point, the support rod and the inclined cylinder support rod are all lower than the lowest threaded hole in the threaded holes, the threaded hole on the support cylinder is matched with the bolt a, the threaded hole on the inclined support cylinder is matched with the bolt b, and the bolt a and the bolt b are all abutted to the inner rod body surface after being screwed.

[0014] Further, triangular inclined supports are arranged on the left and right side walls of each support cylinder.

[0015] Further, an abutment plate is mounted above the top plate, a plurality of pressure sensors are uniformly arranged between the top plate and the abutment plate, each pressure sensor is connected with a display box fixed in front of the dustproof cylinder through a cable penetrating through the top plate, the outer side of the cable is wrapped by a cable frame, the display box is inlaid with a display screen and internally provided with a control module and a power module, and the display box is connected with a warning lamp fixed on the surface of the dustproof cylinder through the cable frame.

[0016] Further, the dustproof cylinder is open at the bottom and is provided with a fixed frame, the length and width of the inner wall of the dustproof cylinder are greater than the diameter of the hydraulic cylinder, and the dustproof cylinder and the fixed frame are provided with rubber sheets a and b;

[0017] The rubber sheets a and b jointly form a closed square frame seal, the center of the square frame seal is a circular hole allowing the hydraulic cylinder to pass through, and the position of the rubber sheet b corresponds to the position of the upper and lower oil inlet and outlet ports of the hydraulic cylinder.

[0018] Further, a plurality of rows of fold line-shaped anti-skid lines are arranged on the lower end surface of the bottom plate.

[0019] Further, when the hydraulic rod is lifted to the lowest point, the top of the support rod and the inclined cylinder support rod does not completely extend into the cavity to which it belongs.

[0020] The beneficial effects of the utility model are:

[0021] The utility model discloses adopt the mode of double inclined rod support to the central hydraulic cylinder and carry out auxiliary support, both share integral stress load, adopt the stability of triangular collaborative telescopic fixed structure again, the utility model discloses set up the dustproof cylinder to the outside of hydraulic rod, can effectively reduce the invasion of coal dust, prolong the service life of hydraulic rod, the utility model discloses adopt pressure sensor and warning light, convenient and fast tell the pressure change degree of coal mine worker, effective early warning, the utility model discloses volume is smaller, the width of before and after is limited, is applicable to very narrow roadway. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the whole three-dimensional schematic view of the utility model hydraulic cylinder after complete jacking.

[0023] Figure 2 It is Figure 1 Front structure schematic diagram after removing bolt a and bolt b;

[0024] Figure 3 It is the three-dimensional cross section schematic diagram of the utility model after half cut;

[0025] Figure 4 It is the dustproof cylinder bottom structure enlarged schematic view of the utility model;

[0026] Figure 5 It is another view of the utility model whole structure.

[0027] In the drawing,

[0028] 1, roof, 101, pressure sensor, 102, abutment plate, 2, bottom plate, 201, anti -slip grain,

[0029] 3, support cylinder, 301, bottom support, 302, support rod, 303, top support, 304, bolt a, 306, triangular inclined strut,

[0030] 4, inclined strut cylinder, 401, inclined cylinder base, 402, inclined cylinder support rod, 403, inclined cylinder top, 404, bolt b,

[0031] 5, hydraulic cylinder, 501, hydraulic rod,

[0032] 6, dustproof cylinder, 7, rubber sheet a, 701, rubber sheet b, 701, 8, fixed frame,

[0033] 9, warning light, 901, cable frame, 902, display box. DETAILED DESCRIPTION

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] like Figures 1 to 5 As shown, this utility model includes a top plate 1 and a bottom plate 2 fixedly connected vertically by a central hydraulic cylinder 5. Inclined support cylinders 3 are symmetrically arranged on the left and right sides of the hydraulic cylinder 5. The inclined triangular arrangement is conducive to stable support. The bottom of the support cylinder 3 is rotatably connected to the bottom support 301 on the bottom plate 2. Each support cylinder 3 is equipped with a freely retractable support rod 302, which is used to extend and retract to different lengths with the hydraulic rod 501. The bottom of the support rod 302 is located in the cylindrical cavity of the support cylinder 3. The top of the support rod 302 is rotatably connected to the top support 303 at the bottom of the top plate 1. An auxiliary support device for inclined support is provided on the outer side of the bottom of each support cylinder 3.

[0037] A dustproof sleeve 6 is provided on the outside of the hydraulic rod 501 at the top of the hydraulic cylinder 5 to prevent the hydraulic rod 501 from being affected by coal mine dust for a long time and becoming ineffective. The top of the dustproof sleeve 6 abuts against the lower end face of the top plate 1, and the bottom of the dustproof sleeve 6 is lower than the upper end face of the cylinder body of the hydraulic cylinder 5 to ensure complete coverage of the hydraulic rod 501 from top to bottom.

[0038] The bottom of the support cylinder 3 is close to the hydraulic cylinder 5 and the cylinder body is a quadrangular prism. The two support cylinders 3 are inverted "V" shape to share the load on the left and right sides, or to share the overall pressure of the hydraulic cylinder 5 before the extremely thin coal seam collapses due to stress.

[0039] The auxiliary support device includes an inclined cylinder top seat 403 fixed on the side wall of the support cylinder 3 away from the hydraulic cylinder 5, and an inclined cylinder support rod 402 rotatably connected to the inclined cylinder top seat 403. The inclined cylinder support rod 402 is located in the cavity of the lower inclined support cylinder 4 and can extend and retract freely. The bottom of the inclined support cylinder 4 is rotatably connected to the inclined cylinder base 401. That is, the auxiliary support device is used to further distribute the force on the inclined support cylinder 3.

[0040] Because the support rod 302 and the inclined cylinder support rod 402 can be freely telescoped in the respective cavities, the support cylinder 3 and the inclined support cylinder 4 are designed with air holes inside and outside, which is only the existing technology known in the art and will not be described in detail.

[0041] The upper end of the support cylinder 3 and the inclined support cylinder 4 is provided with several front and rear threaded holes, when the hydraulic rod 501 rises to the highest point, the support rod 302 and the inclined cylinder support rod 402 are below the bottommost threaded hole in the threaded hole, the threaded hole on the support cylinder 3 is matched with the bolt a 304, the threaded hole on the inclined support cylinder 4 is matched with the bolt b 404, the bolt a 304 and the bolt b 404 are abutted to the inner rod surface after being tightened, that is, the height of the support rod 302 and the inclined cylinder support rod 402 is fixed by using lateral pressure.

[0042] The left and right side walls of each support cylinder 3 are provided with triangular inclined braces 306, which can prevent the side from being broken due to excessive force.

[0043] The top plate 1 is provided with an abutment plate 102, and a plurality of pressure sensors 101 are evenly arranged between the top plate 1 and the abutment plate 102, which are used to detect the pressure change given by the extremely thin coal seam above, and also can monitor the pressure that the hydraulic cylinder 5 can give when the hydraulic cylinder 5 is jacked to the coal seam above, to prevent overload. The top plate and each pressure sensor 101 are connected with a display box 902 fixed in front of a dustproof cylinder 6 through a cable passing through the top plate 1, the outside of the cable is wrapped with a cable frame 901 to prevent damage and exposure, the display box 902 is embedded with a display screen and has a control module and a power module built-in, the display box 902 is connected with a warning light 9 fixed on the surface of the dustproof cylinder 6 through the cable frame 901, the warning light 9 is a multi-color light, which can change from white to red according to the parameters set by the control module to indicate overload.

[0044] The dustproof cylinder 6 is open at the bottom and provided with a fixed frame 8, the length and width of the inner wall of the dustproof cylinder 6 are greater than the diameter of the hydraulic cylinder 5, and the dustproof cylinder 6 and the fixed frame 8 are provided with rubber sheets a 7 and b 701;

[0045] The rubber sheets a 7 and b 701 together form a closed square frame seal, the center of the square frame seal is a circular hole allowing the hydraulic cylinder 5 to pass through, the position of the rubber sheet b 701 corresponds to the position of the upper and lower oil inlet and outlet of the hydraulic cylinder 5, that is, the protruding part of the hydraulic cylinder 5 will cause elastic deformation of the rubber sheet b 701 when it contacts the rubber sheet b 701, allowing it to pass through, although there will be unavoidable gaps.

[0046] The lower end surface of the bottom plate 2 is provided with several rows of fold line-shaped anti-skid lines 201 to prevent displacement after the machine is fixed.

[0047] When the hydraulic rod 501 is lifted to the lowest point, the support rod 302 and the inclined cylinder support rod 402 top do not completely extend into the respective cavity to prevent the rotating shaft from interfering with the bottom cavity.

[0048] Finally, it is explained that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Other modifications or equivalent replacements of the technical solutions of the present application made by those skilled in the art shall be covered in the scope of the claims of the present application as long as they do not deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. A hydraulic support for very thin coal seams, characterized in that: The application relates to a hydraulic cylinder (5) which is fixedly connected with a top plate (1) and a bottom plate (2) through a central hydraulic cylinder (5), and the left and right sides of the hydraulic cylinder (5) are symmetrically provided with inclined support cylinders (3); the bottom of each support cylinder (3) is rotatably connected with a bottom support (301) on the bottom plate (2); a support rod (302) capable of freely stretching and retracting is arranged in each support cylinder (3); the bottom of the support rod (302) is located in the cylindrical cavity of the support cylinder (3); the top of the support rod (302) is rotatably connected with a top support (303) on the bottom of the top plate (1); and an auxiliary support device capable of being obliquely supported is arranged on the bottom outer side of each support cylinder (3). A dustproof cylinder (6) is arranged on the outer side of a hydraulic rod (501) at the top of the hydraulic cylinder (5); the top of the dustproof cylinder (6) is abutted with the lower end surface of the top plate (1); and the bottom of the dustproof cylinder (6) is lower than the upper end surface of the cylinder body of the hydraulic cylinder (5).

2. The hydraulic support for thin seams according to claim 1, characterized in that: The bottom of the support cylinder (3) is close to the hydraulic cylinder (5) and the cylinder body is a quadrangular prism; and the two support cylinders (3) are in the shape of an inverted "8". The auxiliary support device comprises an inclined cylinder top support (403) fixed on the side wall of the support cylinder (3) away from the hydraulic cylinder (5); and an inclined cylinder support rod (402) rotatably connected with the inclined cylinder top support (403); the inclined cylinder support rod (402) is located in the cylinder cavity of an inclined support cylinder (4) below and can freely stretch and retract; and the bottom of the inclined support cylinder (4) is rotatably connected with an inclined cylinder bottom support (401).

3. The hydraulic support for thin seams according to claim 2, characterized in that: A plurality of front and rear penetrating threaded holes are arranged at the upper ports of the support cylinder (3) and the inclined support cylinder (4). When the hydraulic rod (501) is lifted to the highest point, the support rod (302) and the inclined cylinder support rod (402) are all lower than the lowest threaded hole among the threaded holes; the threaded hole on the support cylinder (3) is matched with a bolt a (304); the threaded hole on the inclined support cylinder (4) is matched with a bolt b (404); and the bolt a (304) and the bolt b (404) are abutted to the inner rod body surface after being tightened.

4. The hydraulic support for thin seams according to claim 1, characterized in that: Triangular inclined braces (306) are arranged on the left and right side walls of each support cylinder (3).

5. The hydraulic support for thin seams according to claim 1, characterized in that: A butt plate (102) is arranged above the top plate (1); a plurality of pressure sensors (101) are uniformly arranged between the top plate (1) and the butt plate (102); each pressure sensor (101) is connected with a display box (902) fixed in front of the dustproof cylinder (6) through a cable penetrating through the top plate (1); the outer side of the cable is wrapped by a cable frame (901); a display screen is inlaid in the display box (902) and a control module and a power module are built-in; and the display box (902) is connected with a warning lamp (9) fixed on the surface of the dustproof cylinder (6) through the cable frame (901).

6. The hydraulic support for thin seams according to claim 1, characterized in that: The bottom of the dustproof cylinder (6) is open and a fixed frame (8) is arranged; the length and width of the inner wall of the dustproof cylinder (6) are greater than the diameter of the hydraulic cylinder (5); and a rubber sheet a (7) and a rubber sheet b (701) are arranged between the dustproof cylinder (6) and the fixed frame (8). The rubber sheet a (7) and the rubber sheet b (701) jointly constitute a closed square frame seal, the center of the square frame seal is a circular hole allowing the hydraulic cylinder (5) to pass through, and the position of the rubber sheet b (701) corresponds to the position of the up and down oil inlet and outlet of the hydraulic cylinder (5).

7. The hydraulic support for thin seams according to claim 1, characterized in that: The lower end surface of the bottom plate (2) is provided with a plurality of rows of anti-skid lines (201) in the shape of a fold line.

8. The hydraulic support for thin seams according to claim 3, characterized in that: When the hydraulic rod (501) rises to the lowest point, the top of the support rod (302) and the inclined cylinder support rod (402) does not completely extend into the cavity to which it belongs.

Images