Self-moving door-shaped support for coal mine

Abstract

The utility model relates to the technical field of coal mining, in particular to a self-moving door-shaped support for a coal mine, which comprises a base and a connecting sleeve, a first hydraulic push cylinder is fixedly mounted at the top end of the base, and the output end of the first hydraulic push cylinder is fixedly connected with the bottom end of a joist. The number of the bases, the number of the first hydraulic push cylinders and the number of the joists are all two, inserting grooves are formed in the two ends of the connecting sleeve correspondingly, the two inserting grooves are used for allowing the ends, close to each other, of the two joists to be installed and inserted correspondingly, and supporting plates are fixedly installed at the top ends of the joists through bolts. The top end face of the supporting plate is parallel to the top end face of the connecting sleeve. The modular supporting frame is formed by inserting and combining the connecting sleeves and the joists, the length of the sleeves can be flexibly selected according to the width of a mine hole, and rapid disassembly and assembly and rigid connection are achieved by combining the locking mode that the bolts penetrate through the first bolt holes and the second bolt holes.

Description

Technical Field

[0001] This utility model relates to the field of coal mining technology, specifically to a self-moving portal frame for coal mines. Background Technology

[0002] When carrying out underground mining operations, such as coal mining, support equipment needs to be installed in the mining face roadways and at the ends of the working face to support the roof of the working face and protect the safety of the construction workers.

[0003] Currently, most supports used to support working faces are one-piece supports, which are not only inconvenient to transport, but also cannot adjust the width of the supports according to the width of the mine shaft. Supports that are too wide cannot be installed in the mine shaft, while supports that are too narrow do not provide significant support, thus greatly reducing the versatility of the supports. Therefore, a self-moving portal frame support for coal mines is proposed. Utility Model Content

[0004] To address the problems in the existing technology, this utility model provides a self-moving portal frame for coal mines.

[0005] The technical solution adopted by this utility model to solve its technical problem is a self-moving portal frame for coal mines, including a base and a connecting sleeve. A first hydraulic cylinder is fixedly installed at the top of the base. The output end of the first hydraulic cylinder is fixedly connected to the bottom end of the support beam. The base, the first hydraulic cylinder, and the support beam are each provided with two. Slots are opened at both ends of the connecting sleeve. The two slots are respectively used for the insertion of the two support beams at their close proximity ends. A support plate is fixedly installed at the top of the support beam by bolts. The top surface of the support plate is parallel to the top surface of the connecting sleeve.

[0006] By adopting the above technical solution, a modular support frame is formed by the insertion and combination of the connecting sleeve and the support beam. The sleeve length can be flexibly selected according to the width of the mine tunnel. Combined with the locking method of the pin passing through the first pin hole and the second pin hole, quick disassembly and rigid connection can be achieved. Two sets of first hydraulic push cylinders drive the support beam to rise and fall. With the parallel top surface design of the support plate and the connecting sleeve, a continuous bearing surface is formed to evenly distribute the top load.

[0007] Specifically, the supporting beam is fixed with reinforcing ribs on both sides, and there are multiple reinforcing ribs.

[0008] By adopting the above technical solution, the multiple reinforcing ribs welded on both sides of the support beam significantly improve its bending strength during the support process. When there is uneven local pressure or vibration at the top of the mine, the reinforcing ribs increase the moment of inertia of the cross section, preventing the support beam from twisting or breaking.

[0009] Specifically, the connecting sleeve has a second pin hole on each of its opposite sides, and the support beam has a first pin hole on each of its opposite sides.

[0010] Specifically, the first pin hole and the second pin hole are adapted to each other, and both the first pin hole and the second pin hole are used for the pin to pass through.

[0011] By adopting the above technical solution, after the support beam is inserted into the slot of the connecting sleeve, the operator simultaneously inserts the pin through both the second pin hole and the first pin hole. The locking effect of the pin restricts the axial displacement of the support beam and the connecting sleeve, ensuring that they remain firmly connected under dynamic loads and avoiding the risk of dislocation due to vibration.

[0012] Specifically, a corner brace is fixedly connected between the output end of the first hydraulic cylinder and the bottom end of the support beam.

[0013] By adopting the above technical solution, the corner brace is welded between the output end of the first hydraulic push cylinder and the bottom end of the support beam, converting the vertical thrust of the hydraulic push cylinder into stable support for the support beam. The triangular corner brace structure effectively disperses local stress, preventing deformation of the bottom of the support beam due to concentrated loads, and extending the service life of the hydraulic push cylinder and the support beam.

[0014] Specifically, the two bases are set as a group, and a second hydraulic push cylinder is provided between two adjacent groups of bases.

[0015] By adopting the above technical solution, when the gantry bracket needs to be moved, one set of bases is used as a fulcrum, the first hydraulic push cylinder at the top of the other set of bases is activated, and the support beam is lowered. Then, the second hydraulic push cylinder is activated to push the set of bases that have been lowered, and the movement can be completed.

[0016] The beneficial effects of this utility model are:

[0017] (1) The self-moving portal frame for coal mines described in this utility model forms a modular support frame by connecting the sleeve and the support beam. The sleeve length can be flexibly selected according to the width of the mine tunnel. Combined with the locking method of the pin penetrating the first pin hole and the second pin hole, it can achieve quick disassembly and rigid connection. Two sets of first hydraulic push cylinders drive the support beam to rise and fall. With the parallel top surface design of the support plate and the connecting sleeve, a continuous bearing surface is formed to evenly distribute the top load.

[0018] (2) The self-moving portal frame for coal mines described in this utility model has reinforcing ribs and corner bracing plates to enhance local bending and compressive strength, ensuring that the structure can still maintain rigidity under complex geological conditions, and significantly improving the adaptability and support stability of mines of different sizes. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the base structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the planar structure of the present invention;

[0023] In the diagram: 1. Base; 2. First hydraulic push cylinder; 3. Angle brace plate; 4. Support plate; 5. Reinforcing rib; 6. Pin; 7. Connecting sleeve; 8. Second hydraulic push cylinder; 9. Support beam; 10. First pin hole; 11. Slot; 12. Second pin hole. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] As one embodiment of this utility model, such as Figures 1-3 As shown, the self-moving portal frame for coal mines according to this utility model includes a base 1 and a connecting sleeve 7. A first hydraulic cylinder 2 is fixedly installed at the top of the base 1. The output end of the first hydraulic cylinder 2 is fixedly connected to the bottom end of the support beam 9. The base 1, the first hydraulic cylinder 2, and the support beam 9 are each provided with two. Slots 11 are opened at both ends of the connecting sleeve 7. The two slots 11 are respectively used for the two supports 9 to be installed at their close ends. A support plate 4 is fixedly installed at the top of the support beam 9 by bolts. The top surface of the support plate 4 is parallel to the top surface of the connecting sleeve 7.

[0026] When in use, the first hydraulic cylinder 2 on the two sets of bases 1 is activated, which can adjust the lifting height of the two support beams 9, so that the support structure composed of the connecting sleeve 7 and the support beam 9 fits tightly against the top of the mine. The slots 11 at both ends of the connecting sleeve 7 are designed to allow the support beam 9 to be inserted to form a rigid connection, ensuring that the force on both sides is even. After the support plate 4 is fixed to the support beam 9 by bolts, its top surface is parallel to the top surface of the connecting sleeve 7, forming a continuous and stable pressure-bearing plane, effectively dispersing the pressure on the top of the mine.

[0027] It should be noted that a synchronization valve or a flow divider / combiner valve is used in the hydraulic system to distribute the hydraulic oil output by the pump equally to the oil circuits of the two first hydraulic push cylinders 2, ensuring that the oil supply flow of the two cylinders is consistent, so as to ensure that the two first hydraulic push rods 2 can move synchronously.

[0028] This utility model also includes that reinforcing ribs 5 are fixedly provided on both sides of the supporting beam 9, and there are multiple reinforcing ribs 5.

[0029] During use, the multiple reinforcing ribs 5 welded to both sides of the support beam 9 significantly improve the bending strength during the support process. When there is local pressure unevenness or vibration at the top of the mine, the reinforcing ribs 5 prevent the support beam 9 from twisting or breaking by increasing the moment of inertia of the cross section.

[0030] This utility model also includes that the connecting sleeve 7 has a second pin hole 12 on both sides opposite to each other, and the support beam 9 has a first pin hole 10 on both sides opposite to each other.

[0031] The present invention also includes that the first pin hole 10 and the second pin hole 12 are adapted to each other, and both the first pin hole 10 and the second pin hole 12 are used for the pin 6 to pass through.

[0032] During use, after the support beam 9 is inserted into the slot 11 of the connecting sleeve 7, the operator simultaneously inserts the pin 6 through both the second pin hole 12 and the first pin hole 10. The locking action of the pin 6 restricts the axial displacement of the support beam 9 and the connecting sleeve 7, ensuring that the two remain firmly connected under dynamic loads and avoiding the risk of dislocation due to vibration.

[0033] This utility model also includes a corner brace 3 fixedly connected between the output end of the first hydraulic push cylinder 2 and the bottom end of the support beam 9.

[0034] During use, the corner brace 3 is welded between the output end of the first hydraulic cylinder 2 and the bottom end of the support beam 9, converting the vertical thrust of the hydraulic cylinder into stable support for the support beam 9. The triangular corner brace structure effectively disperses local stress, preventing deformation of the bottom of the support beam 9 due to concentrated loads, and extending the service life of the hydraulic cylinder and the support beam 9.

[0035] This utility model also includes that two of the bases 1 are set as a group, and a second hydraulic push cylinder 8 is provided between two adjacent groups of bases 1.

[0036] When the gantry bracket needs to be moved, one set of bases 1 is used as a fulcrum. The first hydraulic push cylinder 2 at the top of the other set of bases 1 is activated, which drives the support beam 9 to descend. Then, the second hydraulic push cylinder 8 is activated to push the set of bases 1 that has been lowered, and the movement can be completed.

[0037] In use, this utility model first selects a suitable length of connecting sleeve 7 according to the width of the mine shaft. The two supporting beams 9 are inserted into the slots 11 at both ends of the connecting sleeve 7 with their ends close to each other. The pins 6 are then passed through the second pin hole 12 and the first pin hole 10 in sequence to fix the supporting beams 9 and the connecting sleeve 7. Then, the support plate 4 is placed on the top surface of the supporting beams 9 and the bolts are screwed in to fix the support plate 4 and the supporting beams 9. By activating the two first hydraulic push cylinders 2, the supporting beams 9 can be pushed upward, so that the supporting beams 9 and the connecting sleeve 7 are pressed against the inner top of the mine shaft, thus providing effective support for mine shafts of different widths.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A self-propelled portal frame for coal mines, comprising a base (1) and a connecting sleeve (7), characterized in that, The top of the base (1) is fixedly installed with a first hydraulic push cylinder (2). The output end of the first hydraulic push cylinder (2) is fixedly connected to the bottom end of the support beam (9). The base (1), the first hydraulic push cylinder (2), and the support beam (9) are each provided with two. The two ends of the connecting sleeve (7) are provided with slots (11). The two slots (11) are respectively used for the two support beams (9) to be installed at their close ends. The top of the support beam (9) is fixedly installed with a support plate (4) by bolts. The top surface of the support plate (4) is parallel to the top surface of the connecting sleeve (7).

2. The self-moving portal frame for coal mines according to claim 1, characterized in that, The supporting beam (9) is fixed with reinforcing ribs (5) on both sides, and there are multiple reinforcing ribs (5).

3. The self-moving portal frame for coal mines according to claim 1, characterized in that, The connecting sleeve (7) has a second pin hole (12) on each of its opposite sides, and the support beam (9) has a first pin hole (10) on each of its opposite sides.

4. A self-moving portal frame for coal mines according to claim 3, characterized in that, The first pin hole (10) is adapted to the second pin hole (12), and both the first pin hole (10) and the second pin hole (12) are used for the pin (6) to pass through.

5. A self-propelled portal frame for coal mines according to claim 1, characterized in that, An angle brace plate (3) is fixedly connected between the output end of the first hydraulic push cylinder (2) and the bottom end of the support beam (9).

6. A self-propelled portal frame for coal mines according to claim 1, characterized in that, Two of the bases (1) are set as a group, and a second hydraulic push cylinder (8) is provided between two adjacent groups of bases (1).

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