Detachable bottom adjusting mechanism for advanced hydraulic support

Abstract

The utility model relates to a detachable bottom adjusting mechanism for a forepoling hydraulic support, which comprises a bottom adjusting fixing mechanism, an inner liquid injection jack, a hinge fixing pin shaft, a jack hinge pin shaft, a forepoling support base and an adjusting bolt, and the bottom adjusting fixing mechanism comprises a hinge lug plate, a jack guide cylinder, a jack fixing seat, an outer cylinder body and a U-shaped clamping seat; the inner liquid injection jack is arranged in the jack guide cylinder, two locking grooves which are in bilateral symmetry are formed in a piston rod of the inner liquid injection jack, and a jack hinge pin shaft inserting groove is formed in the jack fixing seat; the adjusting bolt is installed on the threaded hole, and the height of the bottom adjusting fixing mechanism is adjusted according to the extending length of the adjusting bolt. The detachable bottom adjusting device is ingenious in design, firm in installation and fixation and convenient to detach and replace, does not occupy the space in the support, can achieve adjustment of different heights through adjustment of the adjusting bolts, is higher in applicability, and has good market prospects and development space compared with the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of advanced hydraulic supports, in particular to a detachable bottom adjustment mechanism for an advanced hydraulic support. Background Art

[0002] Under the influence of mining in the coal mining face, the surrounding rock of the advanced roadway in the coal mining face is affected by multiple support pressures and overlapping pressures, and the mine pressure manifestation is complex. At the same time, the equipment layout in this area is dense, which is the key point and difficulty of coal mine maintenance for pedestrians, ventilation, transportation and transportation throat. Therefore, according to the "Coal Mine Safety Regulations", the coal mining face must maintain at least two unobstructed safety exits, one leading to the air roadway and the other leading to the machine roadway. All safety exits at the connection between the coal mining face and the roadway within the influence range of the advanced pressure must be strengthened in support, and the length of the strengthened roadway shall not be less than 20m. Due to the advantages of good support effect, long support length, fast support moving speed, etc., two-row advanced hydraulic supports are more and more widely used in roadway support.

[0003] In coal mine production, especially in the working face with poor floor conditions and inclined coal seams, after the advanced support is moved, it will be skewed and misaligned, which is not conducive to support management and scraper conveyor pushing operation. Therefore, the position relationship can be adjusted by the top beam adjustment jack at the top of the support. At the lower part of the support, the position relationship needs to be adjusted by the bottom adjustment device. However, at present, due to the limitation of the roadway space, the advanced bottom adjustment device in the machine roadway mostly adopts the form of adding a bottom adjustment cylinder and a bottom adjustment jack in the base box. This method is very difficult to disassemble and maintain in a narrow space and complex working conditions. Moreover, for some large-tonnage advanced supports, the required bottom adjustment jack specifications are larger, the installation space requirements for the base are higher, and more space of the hydraulic support is occupied, which often increases the design and processing difficulty of the advanced support.

[0004] How to design a detachable bottom adjustment mechanism for an advanced hydraulic support with ingenious design, simple structure, reliable installation and fixation, convenient disassembly and replacement, not occupying the internal space of the support, capable of realizing different height adjustments of the detachable bottom adjustment device through adjusting bolts, and stronger applicability is the problem to be solved at present. Summary of the Utility Model

[0005] In order to solve the technical problems existing in the existing advanced bottom adjusting device, which mostly adopts the form of adding a bottom adjusting cylinder and a bottom adjusting jack in the base box. It is very difficult to disassemble and maintain in a narrow space and complex working conditions. For some advanced supports with large tonnage, the specifications of the required bottom adjusting jacks are larger, the installation space requirements for the base are higher, and more space of the hydraulic support is occupied, which often increases the design and processing difficulty of the advanced support. The utility model provides a bottom adjusting mechanism for a detachable advanced hydraulic support to achieve the purposes of ingenious design, simple structure, reliable installation and fixation, convenient disassembly and replacement, not occupying the internal space of the support, and stronger applicability through adjusting bolts to adjust different heights of the detachable bottom adjusting device.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a bottom adjusting mechanism for a detachable advanced hydraulic support, including a bottom adjusting fixing mechanism, an internal injection jack, a hinge fixing pin, a jack hinge pin, an advanced support base and an adjusting bolt. Among them, the bottom adjusting fixing mechanism includes a hinge ear plate, a jack guide cylinder, a jack fixing seat, an outer cylinder body and a U-shaped clamping seat. Outer cylinder bodies are arranged on both sides of the hinge ear plate, and a plurality of threaded holes are evenly arranged on the outer cylinder body. The jack fixing seat is arranged on one side of the outer cylinder body, and the U-shaped clamping seat is arranged on the jack fixing seat; the internal injection jack is arranged in the jack guide cylinder, and two symmetrically arranged locking grooves are arranged on the piston rod of the internal injection jack. A jack hinge pin slot corresponding to the position of the locking groove is arranged on the jack fixing seat. The inner end of the jack hinge pin is arranged in the jack hinge pin slot and the locking groove, and the outer end of the jack hinge pin is fixed on the jack fixing seat through the U-shaped clamping seat; the adjusting bolt is installed on the threaded hole, and the height of the bottom adjusting fixing mechanism is adjusted according to the extending length of the adjusting bolt.

[0007] As a further optimized scheme of the above bottom adjusting mechanism for a detachable advanced hydraulic support, two ear plate holes of different sizes are arranged on the hinge ear plate. Among them, the large ear plate hole is clamped on the jack guide cylinder, and the small ear plate hole is connected to the push hinge hole on the advanced support base through a hinge fixing pin.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] The utility model includes a bottom adjustment fixing mechanism, an internally injected jack, a hinge fixing pin shaft, a jack hinge pin shaft, a front support base, and an adjustment bolt. The bottom adjustment fixing mechanism includes a hinge ear plate, a jack guide cylinder, a jack fixing seat, an outer cylinder, and a U-shaped clamping seat. Outer cylinders are arranged on both sides of the hinge ear plate, and a plurality of threaded holes are evenly arranged on the outer cylinder; the adjustment bolt is installed in the threaded hole, and the height of the bottom adjustment fixing mechanism is adjusted according to the extending length of the adjustment bolt. The utility model is ingeniously designed, simple in structure, firmly installed and fixed, convenient to disassemble and replace, does not occupy the internal space of the support, and can realize different height adjustments of the detachable bottom adjustment device through the adjustment of the adjustment bolt, with stronger applicability. Brief Description of the Drawings

[0010] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0011] Figure 2 is a three-dimensional structural schematic diagram of the bottom adjustment fixing mechanism;

[0012] Figure 3 is a sectional structural schematic diagram of the bottom adjustment fixing mechanism;

[0013] Figure 4 is a front view structural schematic diagram of the hinge ear plate;

[0014] Figure 5 is a sectional structural schematic diagram of the jack fixing seat;

[0015] Figure 6 is a sectional structural schematic diagram of the outer cylinder;

[0016] Figure 7 is a front view structural schematic diagram of the internally injected jack;

[0017] Figure 8 is a schematic diagram of the locking form of the internally injected jack and the jack hinge pin shaft;

[0018] Figure 9 is a top view structural schematic diagram of the bottom adjustment device installed in the left and right columns of the front support base;

[0019] Figure 10 is a three-dimensional structural schematic diagram of the bottom adjustment device installed in the left and right columns of the front support base;

[0020] Markings in the figure: 1. Bottom adjustment fixing mechanism, 101. Hinge ear plate, 102. Jack guide cylinder, 103. Jack fixing seat, 104. Outer cylinder, 105. U-shaped clamping seat, 106. Threaded hole, 107. Jack hinge pin shaft slot, 2. Internally injected jack, 201. Locking groove, 3. Hinge fixing pin shaft, 4. Jack hinge pin shaft, 5. Front support base, 6. Adjustment bolt. Detailed Description of the Embodiment

[0021] The following further describes in detail the specific embodiments of the present utility model in conjunction with the accompanying drawings.

[0022] As shown in the figure, the floor adjustment mechanism for a detachable advanced hydraulic support includes a floor adjustment fixing mechanism 1, an internal injection jack 2, a hinged fixing pin 3, a jack hinged pin 4, an advanced support base 5, and an adjustment bolt 6. Among them, the floor adjustment fixing mechanism 1 includes a hinged ear plate 101, a jack guide cylinder 102, a jack fixing seat 103, an outer cylinder 104, and a U-shaped clamping seat 105. Outer cylinders 104 are arranged on both sides of the hinged ear plate 101, and a plurality of threaded holes 106 are evenly arranged on the outer cylinder 104. The jack fixing seat 103 is arranged on one side of the outer cylinder 104, and the U-shaped clamping seat 105 is arranged on the jack fixing seat 103; the internal injection jack 2 is arranged in the jack guide cylinder 102, and two symmetrically arranged locking grooves 201 are arranged on the piston rod of the internal injection jack 2. A jack hinged pin slot 107 corresponding to the position of the locking groove 201 is arranged on the jack fixing seat 103. The inner end of the jack hinged pin 4 is arranged in the jack hinged pin slot 107 and the locking groove 201, and the outer end of the jack hinged pin 4 is fixed to the jack fixing seat 103 through the U-shaped clamping seat 105; the adjustment bolt 6 is installed on the threaded hole 106, and the height of the floor adjustment fixing mechanism 1 is adjusted according to the extending length of the adjustment bolt 6.

[0023] The hinged ear plate 101 is provided with two ear plate holes of different sizes. Among them, the large ear plate hole is clamped on the jack guide cylinder 102, and the small ear plate hole is connected to the pushing hinged hole on the advanced support base 5 through the hinged fixing pin 3.

[0024] The using process of the present utility model is as follows: The internal injection jack 2 designed with the locking groove 201 is installed into the jack guide cylinder 102. Two symmetrically arranged locking grooves 201 are arranged on the piston rod of the internal injection jack 2. A jack hinged pin slot 107 corresponding to the position of the locking groove 201 is arranged on the jack fixing seat 103. The inner end of the jack hinged pin 4 is arranged in the jack hinged pin slot 107 and the locking groove 201, and the outer end of the jack hinged pin 4 is fixed to the jack fixing seat 103 through the U-shaped clamping seat 105. The U-shaped clamping seat 105 is used to prevent the jack hinged pin 4 from moving up and down. After the floor adjustment fixing mechanism 1 and the internal injection jack 2 are assembled through the jack hinged pin 4, the hinged ear plate 101 and the pushing hinged hole at the tail of the advanced support base 5 are installed together through the hinged fixing pin 3. Then, the adjustment bolt 6 is installed into the threaded hole 106 of the floor adjustment fixing mechanism 1, and the height adjustment of the floor adjustment device is realized according to the extending length of the adjustment bolt 6.

[0025] The utility model is ingeniously designed, simple in structure, firmly installed and fixed, convenient to disassemble and replace, and does not occupy the internal space of the support. Different height adjustments of the detachable bottom adjustment device can be achieved through adjustment bolts, with stronger applicability, solving the technical problems existing in the prior advanced bottom adjustment device, such as mostly adopting the form of adding a bottom adjustment cylinder and a bottom adjustment jack in the base box, which is very difficult to disassemble and maintain in a narrow space and complex working conditions. For some large-tonnage advanced supports, the required specifications of the bottom adjustment jack are larger, the installation space requirements for the base are higher, and more space of the hydraulic support is occupied, often increasing the design and processing difficulties of the advanced support. For the prior art, it has good market prospects and development space.

[0026] The specific preferred embodiments and examples of the utility model are described in detail above with reference to the drawings. However, the utility model is not limited to the above embodiments and examples. Various changes can be made without departing from the concept of the utility model within the scope of knowledge possessed by those skilled in the art.

Claims

1. Detachable bottom adjustment mechanism for advanced hydraulic support, characterized in that: It includes a bottom adjustment fixing mechanism (1), an internal-injection jack (2), a hinged fixing pin (3), a jack hinged pin (4), an advanced support base (5), and an adjusting bolt (6). Among them, the bottom adjustment fixing mechanism (1) includes a hinged ear plate (101), a jack guide cylinder (102), a jack fixing seat (103), an outer cylinder (104), and a U-shaped clamping seat (105). Outer cylinders (104) are arranged on both sides of the hinged ear plate (101), and a plurality of threaded holes (106) are evenly arranged on the outer cylinder (104). The jack fixing seat (103) is arranged on one side of the outer cylinder (104), and the U-shaped clamping seat (105) is arranged on the jack fixing seat (103); the internal-injection jack (2) is arranged in the jack guide cylinder (102), and two symmetrically arranged locking grooves (201) are arranged on the piston rod of the internal-injection jack (2). A jack hinged pin slot (107) opposite to the position of the locking groove (201) is arranged on the jack fixing seat (103). The inner end of the jack hinged pin (4) is arranged in the jack hinged pin slot (107) and the locking groove (201), and the outer end of the jack hinged pin (4) is fixed on the jack fixing seat (103) through the U-shaped clamping seat (105); the adjusting bolt (6) is installed on the threaded hole (106), and the height of the bottom adjustment fixing mechanism (1) is adjusted according to the extension length of the adjusting bolt (6).

2. The bottom adjustment mechanism for a detachable advanced hydraulic support according to claim 1, characterized in that: Two ear plate holes of different sizes are arranged on the hinged ear plate (101). Among them, the large ear plate hole is clamped on the jack guide cylinder (102), and the small ear plate hole is connected to the pushing hinge hole on the advanced support base (5) through the hinged fixing pin (3).

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