Supporting shield type top coal caving hydraulic support

Abstract

The utility model relates to the technical field of underground mining, and discloses a supporting shield type top coal caving hydraulic support which comprises a top beam, a stand column, a base, a shield beam, a four-bar mechanism and a coal caving mechanism, the coal caving mechanism comprises a tail beam which is hinged to the lower end of the shield beam and is of a box type structure, and a tail beam jack is arranged between the lower portion of the tail beam and the lower portion of the shield beam; an inserting plate which reciprocates along a guide rail guide groove is inserted into the tail beam box cavity, a rack is fixed to the end face of the tail end of the inserting plate, an integrated cover plate extending to the two sides of the inserting plate is installed on the lower portion of the tail end of the inserting plate, and a guide groove matched with the guide rail in the tail beam box cavity is formed in the lower portion of the inserting plate; side protection plates are installed on the two sides of the tail beam through tail beam side pushing jacks, each side protection plate comprises a side plate and a top plate which are vertically arranged, the top plates are located on the upper surface of the tail beam, and the side plates are installed on the outer side of the tail beam. According to the device, the stability and durability of the tail beam structure are improved; and the stress condition, the assembly relation and the structural performance of the bracket are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of underground mining, in particular to a top coal caving hydraulic support, specifically a support and shielding type top coal caving hydraulic support. Background Technique

[0002] At present, the main support type used in domestic top coal caving working faces is the four-column support and shielding type top coal caving hydraulic support. The four-column top coal caving hydraulic support has the advantages of strong support and shielding ability, high stability, wide pedestrian passage, and convenient operation, so it is widely used.

[0003] The ZF7500 / 22 / 34 type hydraulic support is a four-column top coal caving hydraulic support designed and manufactured for a fully mechanized mining working face of a certain mine. This support has a strong bearing capacity and good roof cutting performance, and is suitable for coal seam mining working faces with relatively hard and stable roofs. During the development process, the dimensional relationship of "three-machine matching" was strengthened. One of the advantages of this support is that the distance from the vertical support resultant force to the coal wall is relatively far, which means that for roofs with protruding rock surfaces, the support effect of this support will be better. In addition, its contact pressure with the top and bottom plates is relatively uniform, and the maximum contact pressure is also relatively small, with high stability.

[0004] To prevent the coal discharge port from being blocked and to break large pieces of coal to a certain extent, racks are arranged along the lower horizontal edge of the slat. In actual use, operators found that this support has problems such as possible gangue leakage and insufficient structural strength in the tail beam, and the rack of the slat is prone to fracture, which affects the operation efficiency; moreover, in actual use, large pieces of coal and gangue on the scraper conveyor behind the tail beam jack are extremely likely to collide with the hose joints of the tail beam jack, resulting in damage to the hose joints of the tail beam jack and causing the tail beam to be uncontrollable. Therefore, a support and shielding type top coal caving hydraulic support needs to be provided. Summary of the Invention

[0005] The utility model aims to solve the problems of possible gangue leakage and insufficient structural strength in the tail beam, easy fracture of the rack of the slat, and easy damage of the angle joints of the tail beam jack existing in the current supports, and provides a support and shielding type top coal caving hydraulic support.

[0006] The utility model is realized by adopting the following technical solutions:

[0007] A hydraulic powered shield support with top coal caving function, comprising a top beam, columns, a base, a shield beam, a four-bar linkage mechanism and a coal discharging mechanism. The coal discharging mechanism includes a tail beam of box structure hinged to the lower end of the shield beam. A tail beam jack is provided between the lower part of the tail beam and the lower part of the shield beam. An insertion plate reciprocatingly moving along guide rails and guide grooves is inserted into the cavity of the tail beam. A rack is fixed to the end face of the tail end of the insertion plate. An integral cover plate extending to both sides of the insertion plate is installed at the lower part of the tail end of the insertion plate. Guide grooves matching with the guide rails in the cavity of the tail beam are provided at the lower part of the insertion plate. Side guard plates are installed on both sides of the tail beam through side push jacks of the tail beam. Each side guard plate includes a side plate and a top plate arranged vertically. The top plate is located on the upper surface of the tail beam, and the side plate is installed on the outer side of the tail beam.

[0008] During implementation, it includes a top beam, columns, a base, a shield beam, a four-bar linkage mechanism and a coal discharging mechanism. The coal discharging mechanism includes a tail beam of box structure hinged to the lower end of the shield beam. A tail beam jack is provided between the lower part of the tail beam and the lower part of the shield beam. The tail beam jack is an internally pressurized jack, which is used to control the rotation of the tail beam, realize the swinging coal discharging of the tail beam, and avoid damage in complex environments at the same time.

[0009] An insertion plate reciprocatingly moving along guide rails and guide grooves is inserted into the cavity of the tail beam, realizing the telescopic auxiliary coal discharging of the insertion plate and controlling the insertion plate to crush large coal blocks by using the rack.

[0010] A rack is fixed to the end face of the tail end of the insertion plate, which is used to crush large coal blocks.

[0011] An integral cover plate extending to both sides of the insertion plate is installed at the lower part of the tail end of the insertion plate. Guide grooves matching with the guide rails in the cavity of the tail beam are provided at the lower part of the insertion plate. Specifically, a pair of guide rails are provided in the cavity of the tail beam, and guide grooves matching with the guide rails are provided on the insertion plate. The cooperation of the guide rails and guide grooves realizes the sliding and telescoping of the insertion plate in the cavity of the tail beam. Compared with the split insertion plate in the prior art, the guide grooves stop at the edge of the integral cover plate, that is, the insertion plate is integrally connected at the side connected with the rack, effectively improving the strength of the insertion plate and the service life of the rack. An insertion plate jack fixing frame is installed at one end of the lower part of the insertion plate located under the integral cover plate. The insertion plate jack fixing frame is located between the two guide grooves. An insertion plate jack connected with the tail beam is installed on the insertion plate jack fixing frame. The insertion plate jack drives the insertion plate to reciprocate along the guide rails.

[0012] On both sides of the tail beam, side guard plates are installed through side jacks of the tail beam. Each side guard plate includes a vertical side plate and a top plate. The top plate and the side plate are integrally connected. The top plate is located on the upper surface of the tail beam, and the lower surface of the top plate is in contact with the upper surface of the tail beam. The side plate is installed on the outside of the tail beam. Specifically, main rib plates are fixed at the lower part of the tail beam box body, side mounting plates are fixed on the side part of the tail beam box body. The side plate is located outside the side mounting plate. A guide rod is installed through between the main rib plate and the side mounting plate. The guide rod penetrates through the side mounting plate, and a spring conduit connecting the main rib plate and the side guard plate is inserted into the guide rod. A tail beam side jack is arranged between two guide rods on the outer side surface of the main rib plate. The tail beam side jack is installed between the outer side surface of the main rib plate and the inner side surface of the side plate.

[0013] During use, the tail beam jack controls the rotation of the tail beam to realize the swing coal discharging of the tail beam, and at the same time avoids damage in a complex environment. When discharging coal, the chute jack can make the chute extend and retract from the cavity of the tail beam box. At the same time, when the tail beam side jack expands and contracts, it drives the side guard plates to extend outwards on both sides, and the top plate moves horizontally along the upper surface of the tail beam, effectively increasing the area of the upper surface of the tail beam and reducing the problem of gangue leakage existing in the tail beam.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] For the powered support with top coal caving of the support and shielding type provided by the utility model, by adopting the sliding fit mode of the guide rail and the guide groove, components such as the chute on the tail beam body can extend and retract freely without phenomena such as jamming, ensuring the reliability of the chute telescopic work.

[0016] At the same time, by adopting an integral chute, the stress on the rack installed on the chute is reduced, and the service life of the rack is improved. By using high-strength materials such as channel steel as the guide groove, the stability and durability of the tail beam structure are further improved; the stress condition, assembly relationship and structural performance of the support are improved.

[0017] By using an internal liquid inlet type tail beam jack and canceling the traditional external joint, on the one hand, the energy transfer can be more efficient, and on the other hand, the hose joint collision and damage in a complex environment can be effectively avoided, enabling the hydraulic support to respond quickly in the coal mine environment and ensuring the smooth progress of the mining work. It ensures the efficient, safe and reliable operation of the hydraulic support in coal mine mining. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It shows the overall structural schematic diagram of the utility model.

[0019] Figure 2 It shows the three-dimensional structural schematic diagram of the utility model.

[0020] Figure 3 It shows the bottom view of the tail beam of the utility model.

[0021] Figure 4 It shows the side view of the tail beam of the present utility model.

[0022] Figure 5 It shows the three-dimensional structure schematic diagram of the tail beam of the present utility model.

[0023] Figure 6 It shows the schematic diagram of the plug plate structure of the present utility model.

[0024] Figure 7 It shows the installation schematic diagram of the side guard plate of the present utility model.

[0025] Figure 8 It shows the installation schematic diagram of the tail beam jack of the present utility model.

[0026] In the figure: 1 - canopy beam, 2 - tail beam, 3 - tail beam jack, 4 - plug plate, 5 - rack, 6 - integral cover plate, 7 - guide groove, 8 - guide rail, 9 - side push jack of tail beam, 10 - side guard plate, 1001 - side plate, 1002 - top plate, 11 - fixing frame of plug plate jack, 12 - plug plate jack, 13 - main rib plate, 14 - side mounting plate, 15 - guide rod. Specific embodiments

[0027] The following combines the accompanying drawings to describe the specific embodiments of the present utility model.

[0028] A supported shield type caving hydraulic support, as Figures 1 to 8 shown: It includes a top beam, a column, a base, a canopy beam, a four-bar linkage mechanism and a coal caving mechanism. The coal caving mechanism includes a box-shaped tail beam 2 hinged to the lower end of the canopy beam 1. There is a tail beam jack 3 between the lower part of the tail beam 2 and the lower part of the canopy beam 1. The tail beam jack 3 is an internal-feed type jack, which is used to control the rotation of the tail beam 2 to realize the swinging coal caving of the tail beam, and at the same time avoid damage in a complex environment.

[0029] A plug plate 4 that reciprocates along the guide rail and guide groove is inserted into the box cavity of the tail beam 2 to realize the telescopic auxiliary coal caving of the plug plate 4 and control the plug plate 4 to break large pieces of coal by using the rack.

[0030] A rack 5 is fixed to the end face of the tail end of the plug plate 4 for breaking large pieces of coal.

[0031] At the lower part of the tail end of the inserting plate 4, an integral cover plate 6 extending to both sides of the inserting plate 4 is installed. A guide groove 7 matching with the guide rail in the cavity of the tail beam box is arranged at the lower part of the inserting plate 4. Specifically, a pair of guide rails 8 are arranged in the cavity of the tail beam 2, and guide grooves 7 matching with the guide rails are arranged on the inserting plate 4. The cooperation of the guide rail and the guide groove realizes the sliding expansion and contraction of the inserting plate in the cavity of the tail beam box. Compared with the split inserting plate in the prior art, the guide groove stops at the edge of the integral cover plate, that is, the inserting plate is integrally connected at the edge connected with the rack, effectively improving the strength of the inserting plate and the service life of the rack. At one end of the lower part of the inserting plate 4 located in the integral cover plate 6, an inserting plate jack fixing frame 11 is installed. The inserting plate jack fixing frame 11 is located between the two guide grooves, and an inserting plate jack 12 connected with the tail beam 2 is installed on the inserting plate jack fixing frame 11. The inserting plate jack 12 drives the inserting plate 4 to reciprocate along the guide rail 8.

[0032] Side guard plates 10 are installed on both sides of the tail beam 2 through side push jacks 9 of the tail beam. Each side guard plate 10 includes a side plate 1001 and a top plate 1002 arranged vertically. The top plate 1002 and the side plate 1001 are integrally connected. The top plate 1002 is located on the upper surface of the tail beam 2, and the lower surface of the top plate 1002 is in contact with the upper surface of the tail beam 2. The side plate 1001 is installed on the outside of the tail beam 2. Specifically, a main rib plate 13 is fixed at the lower part of the tail beam 2 box body, and a side mounting plate 14 is fixed on the side part of the tail beam box body. The side plate 1001 is located outside the side mounting plate 14. A guide rod 15 is installed through the main rib plate 13 and the side mounting plate 14. The guide rod 15 penetrates through the side mounting plate 14, and a spring conduit connecting the main rib plate 13 and the side guard plate 10 is installed in the guide rod 15. A side push jack 9 of the tail beam is arranged between the two guide rods 15 on the outer side surface of the main rib plate 13. The side push jack 9 of the tail beam is installed between the outer side surface of the main rib plate 13 and the inner side surface of the side plate 1001.

[0033] During use, the tail beam jack 3 controls the rotation of the tail beam 2 to realize the swinging of the tail beam for coal discharging, and at the same time avoids damage in a complex environment. During coal discharging, the inserting plate jack 12 can make the inserting plate 4 extend out of and retract into the cavity of the tail beam 2. At the same time, when the side push jack 9 of the tail beam expands and contracts, it drives the side guard plate 10 to extend outwards on both sides, and the top plate 1002 translates along the upper surface of the tail beam 2. In actual use, only one side of the side guard plate 10 needs to be extended, effectively increasing the area of the upper surface of the tail beam and reducing the problem of gangue leakage of the tail beam.

[0034] The scope of protection required by the present utility model is not limited to the above specific embodiments. Moreover, for those skilled in the art, the present utility model can have various deformations and modifications. Any modification, improvement and equivalent replacement made within the concept and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A hydraulic powered shield support with top coal caving function, comprising a top beam, columns, a base, a shield beam, a four-bar linkage mechanism and a coal discharging mechanism. The coal discharging mechanism includes a tail beam (2) with a box-shaped structure hinged to the lower end of the shield beam (1), and is characterized in that: A tail beam jack (3) is provided between the lower part of the tail beam (2) and the lower part of the shield beam (1); An insertion plate (4) that reciprocates along a guide rail and a guide groove is inserted into the box cavity of the tail beam (2). A rack (5) is fixed to the end face of the tail end of the insertion plate (4). An integral cover plate (6) extending to both sides of the insertion plate (4) is installed at the lower part of the tail end of the insertion plate (4). A guide groove (7) matching with the guide rail in the tail beam box cavity is provided at the lower part of the insertion plate (4); Side guard plates (10) are installed on both sides of the tail beam (2) through side push jacks (9) of the tail beam. Each side guard plate (10) includes a side plate (1001) and a top plate (1002) arranged vertically. The top plate (1002) is located on the upper surface of the tail beam (2), and the side plate (1001) is installed on the outer side of the tail beam (2).

2. The powered support with top coal caving for shield support according to claim 1, wherein: A pair of guide rails (8) are provided in the box cavity of the tail beam (2), and guide grooves (7) matching with the guide rails are provided on the insertion plate (4); An insertion plate jack fixing frame (11) is installed at one end of the integral cover plate (6) at the lower part of the insertion plate (4). The insertion plate jack fixing frame (11) is located between the two guide grooves. An insertion plate jack (12) connected to the tail beam (2) is installed on the insertion plate jack fixing frame (11).

3. The powered support with top coal caving of the shielding type according to claim 1, wherein: A main rib plate (13) is fixed to the lower part of the tail beam (2) box body, and a side mounting plate (14) is fixed to the side part of the tail beam box body. A guide rod (15) is installed through the main rib plate (13) and the side mounting plate (14). A spring conduit connecting the main rib plate (13) and the side guard plate (10) is inserted into the guide rod (15).

4. A powered roof caving hydraulic support of the supported shield type according to claim 3, characterized in that: A side push jack (9) of the tail beam is provided on the outer side surface of the main rib plate (13) between the two guide rods (15).

5. A powered support with top coal caving for shielding and support according to claim 3, characterized in that: The top plate (1002) and the side plate (1001) are integrally connected. The side plate (1001) is located outside the side mounting plate (14). The side push jack (9) of the tail beam is installed between the outer side surface of the main rib plate (13) and the inner side surface of the side plate (1001).

6. The powered support for top coal caving with support and shield type according to claim 1, characterized in that: The tail beam jack (3) is an internal fluid inlet type jack.

7. A powered support with top coal caving and shielding according to claim 5, characterized in that: The lower surface of the top plate (1002) is in contact with the upper surface of the tail beam (2).

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