Hydraulic support roof-contacting device

Abstract

The utility model discloses a hydraulic support roof-contacting device, belongs to the technical field of coal mining equipment, and solves the problem that support top beams of hydraulic supports are not compactly contacted with the roof due to unevenness of roadway roofs. Comprising a closed high-pressure liquid tank, the lower portion of the high-pressure liquid tank is detachably connected with a support top beam of a hydraulic support, a plurality of floating type roof-contacting mechanisms are arranged on the upper portion of the high-pressure liquid tank, driving parts of the floating type roof-contacting mechanisms are located in the high-pressure liquid tank, and roof-contacting parts of the floating type roof-contacting mechanisms are located above the top of the high-pressure liquid tank. And a high-pressure liquid medium with a constant volume is arranged in a liquid cavity of the high-pressure liquid tank. The hydraulic support is reasonable in design, compact in structure and capable of automatically adjusting the telescopic length of a plurality of floating type roof contact mechanisms according to the actual shape of the roadway roof so as to be tightly attached to the uneven and undulating roadway roof, and the supporting effect and the use safety of the hydraulic support are effectively improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of coal mining equipment, specifically relating to a hydraulic support jacking device. Background Technology

[0002] In underground coal mining operations, hydraulic supports are core equipment for ensuring the safety of the coal face, and their roof support effect directly affects the quality of roadway roof support and the safety of mining operations. Traditional hydraulic supports have relatively fixed support beam structures. When the coal seam roof is uneven, with undulations, depressions, or irregularities, the support beams cannot fully and tightly fit against the roadway roof. This incomplete roof support not only reduces the support efficiency of the hydraulic supports but may also lead to safety accidents such as roof collapse due to localized stress concentration. Currently, some improved support beams adopt split beams or add elastic pads. However, split beams have poor adjustment flexibility and are difficult to adapt to complex roadway roof shapes. Although elastic pads have a good buffering effect, their support rigidity is severely insufficient and cannot meet the high-strength roof support requirements of roadways. Therefore, it is necessary to improve the roof support device on the existing hydraulic support beams. Utility Model Content

[0003] This utility model addresses the aforementioned problems by providing a hydraulic support roofing device that can automatically adjust the extension and retraction lengths of multiple floating roofing mechanisms according to the actual shape of the roadway roof, achieving a tight fit with uneven and undulating roadway roofs, effectively solving the problem of insecure roofing of the support beam, and significantly improving the support effect and safety of the hydraulic support.

[0004] The technical solution adopted by this utility model is as follows: the hydraulic support jacking device includes a high-pressure liquid tank, characterized in that: the high-pressure liquid tank is a closed structure, the lower part of the high-pressure liquid tank is detachably connected to the support top beam of the hydraulic support, the upper part of the high-pressure liquid tank is provided with several sets of longitudinally arranged floating jacking mechanisms, the driving part of the floating jacking mechanism is located inside the high-pressure liquid tank, and the jacking top of the floating jacking mechanism is located above the top of the high-pressure liquid tank, and the liquid chamber of the high-pressure liquid tank is provided with a high-pressure liquid medium with a constant volume.

[0005] The floating roof support mechanism includes two sets of horizontally arranged, parallel support plate lifting and guiding fixing sleeves. The support plate lifting and guiding fixing sleeves are fixedly installed inside the high-pressure liquid tank, with the upper insertion interface of the support plate lifting and guiding fixing sleeve located at the top of the high-pressure liquid tank and the lower opening of the support plate lifting and guiding fixing sleeve located inside the liquid cavity of the high-pressure liquid tank. Support plate lifting piston rods are also inserted into the two sets of support plate lifting and guiding fixing sleeves respectively. A roof support plate is hinged between the upper ends of the two sets of support plate lifting piston rods, and a piston rod drive piston is provided at the lower end of the support plate lifting piston rod. When the roof of the roadway is uneven, and the roof support device is in contact with the roof, the support plate of the floating roof support mechanism is compressed as the support plate lifting piston rod contacts the uneven roadway roof. The high-pressure liquid medium with a constant volume in the high-pressure liquid tank will enter the support plate lifting guide fixing sleeve through the lower opening of other floating roof support mechanisms, so as to push the support plate lifting piston rod upward, thereby making the corresponding roof support plate contact the roadway roof, until the support beam of the hydraulic support is in place.

[0006] The top support plate includes a support plate body. Two piston rod hinge lugs are respectively provided at both ends of the support plate body for hinged connection to the upper end of the lifting piston rod. Furthermore, piston rod ball head contact sockets are respectively provided between the two piston rod hinge lugs and on the lower side of the support plate body for contacting the piston rod ball head at the upper end of the lifting piston rod. By utilizing the hinge structure between the top support plate and the tops of the two lifting piston rods, and the arrangement of the piston rod ball head contact sockets, the top support plate can flexibly adjust the tilt angle of the top support in the lateral direction.

[0007] The two sides of the lower part of the high-pressure liquid tank are connected to the liquid tank connection part on the top beam of the support through top beam connecting seats. The top beam connecting seats on both sides of the lower part of the high-pressure liquid tank are connected to the corresponding liquid tank connection parts on the top beam of the support through pins, thereby facilitating the installation and removal of the top mounting device on the top beam of the support.

[0008] The high-pressure liquid tank is equipped with a replenishment port on its side. This port allows for replenishment of the high-pressure liquid medium within the tank chamber according to actual usage conditions within the tunnel, ensuring sufficient liquid volume and guaranteeing the reliability of the device.

[0009] A sealing structure is provided between the upper insertion interface of the support plate lifting piston rod and the support plate lifting guide fixing sleeve, and a sealing structure is also provided between the piston rod driving piston at the lower end of the support plate lifting piston rod and the inner wall of the support plate lifting guide fixing sleeve. The sealing structures at the upper and lower ends effectively improve the efficiency of the high-pressure liquid medium in driving the lifting piston rod within the support plate lifting guide fixing sleeve.

[0010] The beneficial effects of this utility model are as follows: Because this utility model adopts a closed-type high-pressure liquid tank, the lower part of the high-pressure liquid tank is detachably connected to the top beam of the hydraulic support. Several sets of longitudinally arranged floating roof-connecting mechanisms are installed on the upper part of the high-pressure liquid tank. The driving part of the floating roof-connecting mechanism is located inside the high-pressure liquid tank, and the connecting part of the floating roof-connecting mechanism is located above the top of the high-pressure liquid tank. The high-pressure liquid tank contains a high-pressure liquid medium with a constant volume. Therefore, its design is reasonable and its structure is compact, effectively solving the problem of uneven roadway roofs causing insecure roof connection of the hydraulic support's top beam. A closed-type high-pressure liquid tank and multiple floating roof-connecting mechanisms are installed above the support's top beam, and the high-pressure liquid medium inside the high-pressure liquid tank drives the floating roof-connecting mechanisms to extend. The roof-connecting device can automatically adjust the extension and retraction lengths of multiple floating roof-connecting mechanisms according to the actual shape of the roadway roof, achieving a close fit with uneven and undulating roadway roofs. It has strong self-adjustment capabilities, significantly improving the support effect and safety of the hydraulic support. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 yes Figure 1 A cross-sectional view of the internal structure of the high-pressure liquid tank and the floating top connection mechanism.

[0013] Figure 3 yes Figure 2 A sectional view along line AA.

[0014] Figure 4 yes Figure 3 A schematic diagram of a top support plate in a structure.

[0015] Figure 5 yes Figure 4 Sectional view along line BB.

[0016] Figure 6 This is a schematic diagram of the hydraulic principle of this utility model.

[0017] Figure 7 This is a schematic diagram of the application state of this utility model under the condition of undulating roadway roof.

[0018] Figure 8 This is a schematic diagram illustrating one usage state of the floating top support plate of the present invention, which flexibly adjusts the tilt angle of the top connection.

[0019] The numbers in the diagram are explained as follows: 1 High-pressure liquid tank, 2 Floating roof support mechanism, 3 Support plate lifting guide fixing sleeve, 4 Support plate lifting piston rod, 5 Roof support plate, 6 Roof beam connecting seat, 7 Liquid replenishment port, 8 Support beam, 9 Support column, 10 Piston rod drive piston, 11 Liquid chamber, 12 Support plate body, 13 Piston rod hinge ear plate, 14 Piston rod ball head contact socket, 15 High-pressure liquid medium, 16 Undulating roadway roof. Detailed Implementation

[0020] according to Figures 1-8 The specific structure of this utility model is described in detail below. The hydraulic support jacking device includes a closed-type high-pressure liquid tank 1. The bottom area of ​​the high-pressure liquid tank 1 is equal to the top area of ​​the support top beam 8. The lower two sides of the high-pressure liquid tank 1 are detachably connected to the liquid tank connecting parts on the support top beam 8 of the hydraulic support via top beam connecting seats 6. A support column 9 is hinged to the lower part of the support top beam 8. Furthermore, the top beam connecting seats 6 on both sides of the lower part of the high-pressure liquid tank 1 are connected to the corresponding liquid tank connecting parts on the support top beam 8 via pins, facilitating the installation and disassembly of the jacking device on the support top beam 8.

[0021] The upper part of the high-pressure liquid tank 1 is provided with several sets of floating top-supporting mechanisms 2 arranged longitudinally. The floating top-supporting mechanism 2 consists of two sets of support plate lifting guide fixing sleeves 3 arranged in parallel along the transverse direction of the roadway. The support plate lifting guide fixing sleeves 3 are fixedly installed inside the high-pressure liquid tank 1, and the upper end insertion interface of the support plate lifting guide fixing sleeve 3 is located at the top of the high-pressure liquid tank 1 to facilitate the insertion of the support plate lifting piston rod 4; the lower end opening of the support plate lifting guide fixing sleeve 3 is located in the liquid cavity 11 of the high-pressure liquid tank 1 to facilitate the lifting and pushing of the support plate lifting piston rod 4 by the high-pressure liquid medium 15 in the high-pressure liquid tank 1. Furthermore, vertically arranged support plate lifting piston rods 4 are respectively inserted into the two sets of support plate lifting guide fixing sleeves 3 of the floating top-mounting mechanism 2. The two sets of support plate lifting piston rods 4 extend to the upper end of the outer side of the top of the high-pressure liquid tank 1 and are hinged to the top-mounting support plate 5. The lower end of the support plate lifting piston rod 4 is provided with a piston rod driving piston 10. The liquid chamber 11 of the high-pressure liquid tank 1 is provided with a high-pressure liquid medium 15 (e.g., high-pressure emulsion) with a constant volume.

[0022] Meanwhile, a sealing structure is provided between the upper insertion interface of the support plate lifting piston rod 4 and the support plate lifting guide fixing sleeve 3, and a sealing structure is also provided between the piston rod driving piston 10 at the lower end of the support plate lifting piston rod 4 and the inner wall of the support plate lifting guide fixing sleeve 3. Thus, when the roadway roof is uneven and the hydraulic support is connected to the roof, the support plate lifting piston rod 4 of the floating roof connection mechanism 2 on the high pressure tank 1, where the roof connection support plate 5 first contacts the undulating roadway roof 16, is compressed. The high pressure liquid medium 15 with a constant volume in the liquid chamber 11 of the high pressure tank 1 will enter the support plate lifting guide fixing sleeve 3 through the lower opening of other floating roof connection mechanisms 2, so as to push the support plate lifting piston rod 4 upward, thereby making the corresponding roof connection support plate 5 contact the roadway roof, until the support beam 8 of the hydraulic support is in place. Furthermore, the support plate lifting guide fixing sleeve 3 can precisely guide the extension and retraction movement of the support plate lifting piston rod 4, ensuring the smoothness and reliability of the extension and retraction movement of the support plate lifting piston rod 4, and ensuring the safety, stability and efficiency of the roof support process; the entire support process does not require a reversing valve to supply liquid to the floating roof support mechanism 2, and each group of floating roof support mechanisms 2 has a differential adjustment structure. Moreover, the sealing structures set at the upper and lower ends respectively effectively improve the efficiency of the high-pressure liquid medium 15 in driving the lifting and retraction of the support plate lifting piston rod 4 in the support plate lifting guide fixing sleeve 3. It is understandable that, according to specific usage needs, in the initial state before the roof support device contacts the roadway roof, the support plate lifting piston rod 4 of each floating roof support mechanism 2 can be in the "half-length extended" mid-position state.

[0023] In addition, the top support plate 5 between the upper ends of the two sets of lifting piston rods 4 is composed of a long strip-shaped support plate body 12. Two piston rod hinge lugs 13 are respectively provided at both ends of the support plate body 12 for hinged connection with the upper ends of the lifting piston rods 4. Furthermore, a piston rod ball head contact socket 14 is provided between the two piston rod hinge lugs 13 and on the lower side of the support plate body 12 for contact with the piston rod ball head at the upper end of the lifting piston rod 4. Thus, by utilizing the hinge structure between the top support plate 5 and the tops of the two lifting piston rods 4, and the arrangement of the piston rod ball head contact socket 14, the top support plate 5 can flexibly adjust the tilt angle of the top in the lateral direction. Moreover, a replenishment port 7 is provided on the side of the high-pressure liquid tank 1. Based on the actual usage conditions in the tunnel, the high-pressure liquid medium 15 (high-pressure emulsion) in the liquid chamber 11 is replenished through the replenishment port 7 on the side of the tank to ensure sufficient liquid volume and guarantee the reliability of the device.

[0024] When using this hydraulic support jacking device, firstly, the top beam connecting seats 6 on both sides of the lower part of the high-pressure liquid tank 1 of the jacking device are connected to the corresponding liquid tank connecting parts on the top beam 8 of the support through the pin shaft, so that the entire jacking device is installed above the top beam 8 of the hydraulic support, so that the jacking device can rise together with the top beam 8 of the support as the support column 9 extends and retracts, and come into contact with the roof of the roadway. Furthermore, when the roadway roof is uneven and the roof support device is in contact with the roof, the piston rod 4 of the floating roof support mechanism 2 on the high-pressure liquid tank 1, where the roof support plate 5 first contacts the undulating roadway roof 16, is compressed. Then, the high-pressure liquid medium 15 with a constant volume in the liquid chamber 11 of the high-pressure liquid tank 1 enters the support plate lifting guide fixing sleeve 3 through the lower opening of other floating roof support mechanisms 2, and then pushes the support plate lifting piston rod 4 upward, so that the corresponding roof support plate 5 contacts the roadway roof. During the entire support process, the floating roof support mechanisms 2 on the high-pressure liquid tank 1 are differentially adjusted until the support beam 8 of the hydraulic support is in place.

Claims

1. A hydraulic support jacking device, comprising a high-pressure liquid tank (1), characterized in that: The high-pressure liquid tank (1) is a closed structure. The lower part of the high-pressure liquid tank (1) is detachably connected to the support top beam (8) of the hydraulic support. The upper part of the high-pressure liquid tank (1) is provided with several sets of floating top-connecting mechanisms (2) arranged longitudinally. The driving part of the floating top-connecting mechanism (2) is located inside the high-pressure liquid tank (1), and the connecting top of the floating top-connecting mechanism (2) is located above the top of the high-pressure liquid tank (1). The liquid chamber (11) of the high-pressure liquid tank (1) is provided with a high-pressure liquid medium (15) with a constant volume.

2. The hydraulic support jacking device according to claim 1, characterized in that: The floating top-mounting mechanism (2) includes two sets of support plate lifting guide fixing sleeves (3) arranged horizontally and side by side along the roadway. The support plate lifting guide fixing sleeves (3) are fixedly installed inside the high-pressure liquid tank (1). The upper end insertion interface of the support plate lifting guide fixing sleeves (3) is located at the top of the high-pressure liquid tank (1), and the lower end opening of the support plate lifting guide fixing sleeves (3) is located in the liquid cavity (11) of the high-pressure liquid tank (1). Support plate lifting piston rods (4) are also inserted into the two sets of support plate lifting guide fixing sleeves (3). A top-mounting support plate (5) is hinged between the upper ends of the two sets of support plate lifting piston rods (4). A piston rod driving piston (10) is provided at the lower end of the support plate lifting piston rods (4).

3. The hydraulic support jacking device according to claim 2, characterized in that: The top support plate (5) includes a support plate body (12). Two piston rod hinge ear plates (13) are respectively provided at both ends of the support plate body (12) for hinged to the upper end of the support plate lifting piston rod (4). Furthermore, between the two piston rod hinge ear plates (13) and on the lower side of the support plate body (12), piston rod ball head contact sockets (14) are respectively provided for contacting the piston rod ball head at the upper end of the support plate lifting piston rod (4).

4. The hydraulic support jacking device according to claim 1, characterized in that: The two sides of the lower part of the high-pressure liquid tank (1) are connected to the liquid tank connection part on the support top beam (8) through the top beam connecting seat (6).

5. The hydraulic support jacking device according to claim 1, characterized in that: The high-pressure liquid tank (1) is provided with a liquid replenishment port (7) on the side of the tank body.

6. The hydraulic support jacking device according to claim 2, characterized in that: A sealing structure is provided between the upper end insertion interface of the support plate lifting piston rod (4) and the support plate lifting guide fixing sleeve (3), and a sealing structure is also provided between the piston rod driving piston (10) at the lower end of the support plate lifting piston rod (4) and the inner wall of the support plate lifting guide fixing sleeve (3).

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