A four-column hydraulic support group convenient to move

Abstract

This application belongs to the field of hydraulic support technology and discloses a movable four-column hydraulic support assembly, including a first support and a second support, and further including: a propulsion component, a lifting component, a connecting component, and side retaining plates. The two ends of the propulsion component are respectively connected to the first base and the second base; the lifting component includes a first bottom lifting jack and a second bottom lifting jack, the first bottom lifting jack being disposed at one end of the first base and the second bottom lifting jack being disposed at one end of the second base; the connecting component includes a first connector and a second connector, the first connector being embedded in the lower end face of the first base; the second connector is hinged to the first connector, and its other end extends into the second base; the side retaining plates are detachably disposed on the first top beam, the second top beam, the first base, and the second base. The first and second bottom lifting jacks raise one end of the first and second bases, allowing them to detach from the bottom of the roadway, thus solving the problem of difficulty in moving the first and second bases.

Description

Technical Field

[0001] This utility model belongs to the field of equipment train technology, specifically relating to a four-column hydraulic support assembly that is easy to move. Background Technology

[0002] Mine support equipment is an essential component of underground coal mines. The main support equipment used in coal mines includes hydraulic supports with four-bar linkages and advanced support supports. Due to the limited space, numerous equipment, and high pressure in the advanced section of the coal face's return roadway, the unique spatial environment still presents safety hazards. For example, underground workers typically move through the working passageway where equipment is dragged using the advanced hydraulic supports, compromising their safety. Therefore, four-column supports are commonly used in this context.

[0003] For example, in the prior art, such as Chinese invention patent application number CN116044471A, a four-column flexible unit-type advanced hydraulic support and roadway support method are disclosed. Specifically, it discloses a base, a top beam, and two sets of column units mounted on the base, with a distance between the two sets of column units to form a passageway for personnel. The free ends of the two sets of column units are rotatably connected to the top beam. Each column unit includes two columns, each with a ball head hinged to the top beam at its top. The columns of the column unit support the top beam so that the top surface of the top beam contacts the roadway roof strata, and the top beam can rotate around the ball head of the column to adapt to the roadway roof, forming effective support. By arranging several four-column flexible unit-type advanced hydraulic supports in a row, a roadway support unit is formed. This method enhances support strength and increases the safety of underground workers while ensuring safe personnel passage.

[0004] The above solution can only be used when the working conditions at the bottom of the tunnel are good. However, the bottom of the tunnel usually becomes sunken, muddy, or soft during the mining process. When the support is completed and needs to be withdrawn or moved, the base is easy to sink into the bottom of the tunnel and be blocked by mud or soil, which makes it difficult to move. Summary of the Invention

[0005] Based on this, this application provides a movable four-column hydraulic support assembly to solve the problem that the bottom of the roadway often experiences depressions, silt, and softness during the mining process. When the support is completed and needs to be withdrawn or moved, the base is prone to sinking into the bottom of the roadway and being blocked by silt or soil, making movement difficult.

[0006] The technical solution to the above-mentioned technical problems in this application is as follows:

[0007] A mobile four-column hydraulic support assembly includes a first support and a second support. The first support includes a first base, a first column, and a first top beam. The second support includes a second base, a second column, and a second top beam. The assembly also includes a propulsion component, a lifting component, a connecting component, and side retaining plates. The propulsion component is connected at both ends to the first base and the second base, and is extendable along the roadway. The lifting component includes a first bottom-lifting jack and a second bottom-lifting jack. The first bottom-lifting jack is located at the end of the first base away from the second base, and the second bottom-lifting jack is located at the end of the second base close to the first base. The connecting component includes a first connector and a second connector. The first connector is embedded in the lower end face of the first base, and one end of the first connector is slidably connected to the end of the first base away from the first bottom-lifting jack. One end of the second connector is hinged to one end of the first connector, and the other end extends into the second base and is slidably connected to the end of the second base away from the second bottom-lifting jack. The side retaining plates are detachably mounted on the first top beam, the second top beam, the first base, and the second base.

[0008] Preferably, the first connecting member includes a first connecting beam and a first pushing jack, the lower end face of the first base is provided with a first groove, the first connecting beam slides and is limitedly engaged with the first groove; the fixed end of the first pushing jack is provided on the upper end face of the first base near the end of the first lifting jack, and the telescopic end of the first pushing jack is connected to the end of the first connecting beam away from the first lifting jack.

[0009] Preferably, a first sliding rod is provided on one end of the first connecting beam, and a first sliding groove is provided on the side wall of the first groove. The first sliding rod and the first sliding groove are in a limiting fit, and the length of the first sliding groove is not less than the safe stroke of the first pushing jack.

[0010] Preferably, the second connecting member includes a second connecting beam and a second pushing jack. The lower end face of the second base is provided with a second groove. The second connecting beam slides and is limitedly engaged with the second groove. The fixed end of the second pushing jack is provided on the upper end face of the second base near the end of the second lifting jack. The telescopic end of the second pushing jack is connected to the end of the second connecting beam away from the second lifting jack.

[0011] Preferably, a second sliding rod is provided on one end of the second connecting beam, and a second sliding groove is provided on the side wall of the second groove. The second sliding rod and the second sliding groove are in a limiting fit, and the length of the second sliding groove is not less than the safe stroke of the second pushing jack.

[0012] Preferably, both the first column and the second column are equipped with a rotatable self-resetting device.

[0013] Preferably, the first connecting beam and the second connecting beam are connected by a hinge.

[0014] Preferably, the hinge includes a protrusion and a C-groove. One end of the protrusion is hinged to the end of the first connecting beam near the second base, and the other end of the protrusion is provided with a through hole. One end of the C-groove is connected to the end of the second connecting beam near the first base, and the other end of the C-groove is provided with a threaded hole. The end of the protrusion with the through hole extends into the end of the C-groove with the threaded hole, and the through hole corresponds to the threaded hole. The protrusion and the C-groove are detachably connected by bolts.

[0015] The technical solution adopted in this application can achieve the following beneficial effects:

[0016] 1. By setting up a first bottom lifting jack and a second bottom lifting jack, one end of the first base and the second base are raised, so that one end of the first base and the second base are separated from the bottom of the roadway, thus solving the problem that the first base and the second base are buried by sand, coal slag, etc., which makes them difficult to move.

[0017] 2. By setting the first connecting piece and the second connecting piece, the contact area between the first base and the second base and the sand and slag is reduced, thereby reducing the resistance during movement and making movement more convenient. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the movable four-column hydraulic support assembly of this application.

[0019] Figure 2 This is a cross-sectional view of the movable four-column hydraulic support assembly of this application.

[0020] Figure 3 A partial cross-section of the movable four-column hydraulic support assembly of this application. Figure 1 .

[0021] Figure 4 A partial cross-section of the movable four-column hydraulic support assembly of this application. Figure 2 .

[0022] In the diagram: First support 100, first base 110, first column 120, first top beam 130, second support 200, second base 210, second column 220, second top beam 230, connecting assembly 300, first connector 310, first connecting beam 311, first pushing jack 312, second connector 320, second connecting beam 321, second pushing jack 322, hinge 330, protrusion 331, C-slot 332, pushing component 340, side baffle plate 400, upper baffle plate 410, lower baffle plate 420, lifting assembly 500, first bottom lifting jack 510, second bottom lifting jack 520. Detailed Implementation

[0023] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0024] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," "top," "bottom," "end," "top," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] Please see Figures 1 to 4This application provides a movable four-column hydraulic support assembly, including a first support 100 and a second support 200. The first support 100 includes a first base 110, a first column 120, and a first top beam 130. The second support 200 includes a second base 210, a second column 220, and a second top beam 230. It also includes a pushing component 340, a lifting assembly 500, a connecting assembly 300, and a side retaining plate 400. The two ends of the pushing component 340 are respectively connected to the first base 110 and the second base 210, and the pushing component 340 can extend and retract along the roadway direction. The lifting assembly 500 includes a first bottom lifting jack 510 and a second bottom lifting jack 520. The first bottom lifting jack 510 is located at the end of the first base 110 away from the second base 210. The second lifting jack 520 is disposed at one end of the second base 210 near the first base 110; the connecting assembly 300 includes a first connector 310 and a second connector 320, the first connector 310 is embedded in the lower end face of the first base 110, and one end of the first connector 310 is slidably connected to the end of the first base 110 away from the first lifting jack 510; one end of the second connector 320 is hinged to one end of the first connector 310, and the other end extends into the second base 210 and is slidably connected to the end of the second base 210 away from the second lifting jack 520; the side baffle plates 400 are detachably disposed on the first top beam 130, the second top beam 230, the first base 110 and the second base 210 respectively.

[0027] Specifically, the propulsion component 340 adopts, but is not limited to, a hydraulic telescopic column, a hydraulic jack, etc. The first bottom lifting jack 510 and the second bottom lifting jack 520 both adopt, but are not limited to, jacks, telescopic rods, etc., preferably hydraulic jacks commonly used in coal mines. The fixed end of the first bottom lifting jack 510 is fixed to the upper surface of the first base 110 by means of a reinforcing plate and is located at one end in the direction of travel. The telescopic end of the first bottom lifting jack 510 is connected to the first connecting member 310. The second bottom lifting jack 520 is also installed in the same way at one end of the second base 210 near the first base 110, and the fixed end of the second bottom lifting jack 520 is fixed to the upper surface of the second base 210 by means of a reinforcing plate. The telescopic end of the second bottom lifting jack 520 is connected to the second connecting member 320.

[0028] Furthermore, the bottom of the tunnel contains protrusions and silt, and both the first base 110 and the second base 210 are surrounded by sand and slag. Both the first support 100 and the second support 200 are in a supported state. When the first support 100 and the second support 200 need to be moved, the first column 120 is lowered and the first lifting jack 510 is extended, raising one end of the first base 110. Then, the pusher 340, using the second support 200 as a fulcrum, pushes the first base 110 to move in a predetermined direction. After moving one step (the safe extension / retraction stroke of the pusher), the first lifting jack 510 is retracted, causing... The first base 110 is lowered and fully contacts the bottom of the tunnel. The first column 120 is raised so that the first top beam 130 contacts the top of the tunnel. The second column 220 is lowered, and the second lifting jack 520 is extended so that one end of the second base 210 is raised. Then, using the first support 100 as a fulcrum, the pusher 340 is retracted to move the second support 200 closer to the first support 100. After moving one step, the second lifting jack 520 is retracted so that the second base 210 contacts the bottom of the tunnel. Then, the second column 220 is raised so that the second top beam 230 contacts the top of the tunnel. If further movement is needed, the above steps are repeated.

[0029] The side baffle plates 400 are detachably mounted on the first top beam 130, the second top beam 230, the first base 110, and the second base 210, respectively. Each side baffle plate 400 includes an upper baffle plate 410 and a lower baffle plate 420. Two lower baffle plates 420 are provided, detachably connected to the first base 110 and the second base 210 respectively by bolts or other means. Two upper baffle plates 410 are provided, detachably connected to the first top beam 130 and the second top beam 230 respectively by bolts or other means. The upper baffle plates 410 and the lower baffle plates 420 partially overlap to ensure no exposed areas.

[0030] The technical solution of this application, which adopts a four-column hydraulic support assembly that is easy to move, can achieve the following beneficial effects:

[0031] 1. By setting up the first lifting jack 510 and the second lifting jack 520, one end of the first base 110 and the second base 210 is raised, so that one end of the first base 110 and the second base 210 are separated from the bottom of the roadway, thus solving the problem that the first base 110 and the second base 210 are buried by sand, coal slag, etc., which makes them difficult to move.

[0032] 2. By setting the first connecting piece 310 and the second connecting piece 320, the contact area between the first base 110 and the second base 210 and the sand and slag is reduced, thereby reducing the resistance during movement and making movement more convenient.

[0033] 3. By setting up 400mm side retaining walls, the problem of difficult support for the roadway sidewalls is solved.

[0034] In the above scheme, the first connecting member 310 includes a first connecting beam 311 and a first pushing jack 312. The lower end surface of the first base 110 is provided with a first groove. The first connecting beam 311 slides and is limited to fit with the first groove. The fixed end of the first pushing jack 312 is provided on the upper end surface of the first base 110 near the end of the first lifting jack 510. The telescopic end of the first pushing jack 312 is connected to the end of the first connecting beam 311 away from the first lifting jack 510.

[0035] Specifically, the first connecting beam 311 is connected to the first groove using a sleeve or a sliding groove. The end of the first connecting beam 311 away from the first lifting jack 510 is slidably disposed in the first groove. The sliding method is, but is not limited to, a slider or a sleeve. The telescopic end of the first pushing jack 312 is hinged to the end of the first connecting beam 311 away from the first lifting jack 510, and the fixed end of the first pushing jack 312 is hinged to the reinforcing plate connected to the first lifting jack 510. In the initial state, the end of the first connecting beam 311 extending out of the first base 110 (the end of the first pushing jack 312) is... 12 is in the extended state); when the first bottom lifting jack 510 extends, the telescopic end of the first bottom lifting jack 510 uses the first connecting beam 311 as the fulcrum, so that one end of the first base 110 is lifted upward, and the first connecting beam 311 is always in contact with the roadway ground; after the pusher 340 drives the first support 100 to move one step, the first bottom lifting jack 510 retracts, the first column 120 rises and supports, the second column 220 is lowered, the second bottom lifting jack 520 is extended, the pusher 340 and the first pusher jack 312 are retracted, and the second base 210 is pulled to move.

[0036] Based on the above scheme, a first sliding rod is provided on one end of the first connecting beam 311, and a first sliding groove is provided on the side wall of the first groove. The first sliding rod and the first sliding groove are matched for limiting, and the length of the first sliding groove is not less than the safe stroke of the first pushing jack 312.

[0037] The second connecting member 320 includes a second connecting beam 321 and a second pushing jack 322. The lower end face of the second base 210 is provided with a second groove. The second connecting beam 321 slides and is limitedly engaged with the second groove. The fixed end of the second pushing jack 322 is provided on the upper end face of the second base 210 near the end of the second lifting jack 520. The telescopic end of the second pushing jack 322 is connected to the end of the second connecting beam 321 away from the second lifting jack 520.

[0038] A second sliding rod is provided on one end of the second connecting beam 321, and a second sliding groove is provided on the side wall of the second groove. The second sliding rod and the second sliding groove are in a limiting fit, and the length of the second sliding groove is not less than the safe stroke of the second pushing jack 322.

[0039] The first base 110 and the second base 210 are respectively provided with a hollowed-out first groove and a second groove along the centerline of the tunnel. The first connecting beam 311 is embedded in the first groove, and the end of the first connecting beam 311 near the second support 200 is hinged to the end of the first base 110 near the second base 210 by means of a rotating shaft, bearing, etc. The side wall of the fixed end of the first lifting jack 510 is perpendicular to and fixedly connected to the upper end surface of the first base 110. The telescopic end of the first lifting jack 510 is connected to the end of the first connecting beam 311 away from the second base 210 by means of a pin, snap-fit, etc., so that when the first lifting jack 510 is in the first position, the first connecting beam 310 is in the first position. The lower end face of beam 311 is flush with the lower end face of the first base 110. When the first lifting jack 510 is in the second position, the lower end face of the first base 110 is flush with the bottom of the tunnel. The first lifting jack 510 extends downward, causing the first connecting beam 311 to rotate downward along the hinge, thereby lifting the first base 110. The fixed end of the first pushing jack 312 and the fixed end of the first lifting jack 510 are both hinged to the first base 110 using fixed plates and lugs. The telescopic end of the first pushing jack 312 is hinged to the end of the first connecting beam 311 near the second base 210 using lugs, bolts, etc. Similarly, the second connecting beam 321... The second connecting beam 321 is embedded in the second groove, and the end of the second connecting beam 321 away from the first bracket 100 is hinged to the end of the second base 210 away from the first base 110 by means of a pivot, bearing, etc. The side wall of the fixed end of the second lifting jack 520 is perpendicular to and fixedly connected to the upper end surface of the second base 210. The telescopic end of the second lifting jack 520 is connected to the end of the second connecting beam 321 near the first base 110 by means of a pin, snap-fit, etc., so that when the second lifting jack 520 is in the third position, the lower end surface of the second connecting beam 321 is flush with the lower end surface of the second base 210. When the second lifting jack 520 is in the fourth position, the second base 210... The lower end face is flush with the bottom of the tunnel, the second connecting beam 321 is in contact with the tunnel floor, the second lifting jack 520 extends downward, causing the second connecting beam 321 to rotate downward along the hinge, thereby lifting the second base 210. The fixed end of the second pushing jack 322 and the fixed end of the second lifting jack 520 are both hinged to the second base 210 using a fixed plate lug. The telescopic end of the second pushing jack 322 is hinged to the end of the second connecting beam 321 away from the first base 110 using lugs, bolts, etc. (both the first pushing jack 312 and the second pushing jack 322 are equipped with a locking function to prevent the reaction force from causing the oil pressure to flow back in reverse).The second connecting beam 321 is connected to the end near the first base 110. This connection utilizes a spherical support, universal joint, or pin hinge to ensure that the rotation of the first connecting beam 311 does not affect the second connecting beam 321. The pushing component 340 employs, but is not limited to, hydraulic or pneumatic unidirectional or bidirectional telescopic jacks. The telescopic end is fixedly connected to the end of the first base 110 near the second base 210, and the fixed end is fixedly connected to the end of the second base 210 near the first base 110. Two pushing components 340 are provided, arranged symmetrically on both sides of the center line of the first base 110 and the second base 210.

[0040] Specifically, depending on the conditions at the bottom of the tunnel, the first lifting jack 510 extends downwards to raise the first base 110. The conditions at the bottom of the tunnel can be varied, for example, water and silt accumulation at the bottom of one support structure, or silt accumulation at the bottom of the entire support structure. When water and silt accumulation at the bottom of one support structure, initially, both the first lifting jack 510 and the second lifting jack 520 are in a retracted state, while both the first pushing jack 312 and the second pushing jack 322 are in an extended state. Through the first pushing jack 3... 12. The contraction causes one end of the first connecting beam 311 to extend beyond the end of the first base 110 away from the second base 210. The telescopic end of the first lifting jack 510 extends downward, causing the end of the first connecting beam 311 near the first lifting jack 510 to descend, squeezing the silt and contacting the hard soil below the silt. In the opposite direction, the first base 110 is lifted upward, so that the lower end face of the first base 110 is flush with the upper surface of the silt geology. The hinge joint between the first connecting beam 311 and the first base 110 rotates but does not affect the second connecting beam 321.

[0041] Lowering the first top beam 130, the pusher 340 pushes the first base 110 forward with the second base 210 as the fulcrum. At the same time, the second pusher jack 322 retracts, causing the second connecting beam 321 to slide from one end of the second base 210 to the other end. Lowering the first column 120 causes the first top beam 130 to move down away from the top of the tunnel. The second top beam 230 contacts the top of the tunnel, and the second base 210 contacts the bottom of the tunnel. The second column 220 makes it difficult for the first base 110 to move away from the first base 110. The pusher 340, with the second base 210 as the fulcrum, extends its telescopic end forward, pushing the first base 110 to move in a preset direction. The moving distance depends on the telescopic length of the pusher 340. At the same time, the second pusher jack 322 assists and retracts with its fixed end as the fulcrum, pulling the second connecting beam 321 forward, causing the first connecting beam 311 and the first base 110 to slide forward simultaneously.

[0042] Raise the first top beam 130 and lower the second top beam 230. The pusher 340 uses the first base 110 as a fulcrum, and the second pusher jack 322 extends. The pusher 340 and the second pusher jack 322 simultaneously drag the second base 210 closer to the first base 110. After the first base 110 moves into position, raise the first column 120 so that the first top beam 130 contacts the top of the roadway, and the first connecting beam 311 contacts the bottom of the roadway under the action of the first bottom lifting jack 510, making it difficult to move again. The pusher 340 uses the first base 110 as a fulcrum and retracts to drag the second base 210 towards the first base 110 until the retracted end of the pusher 340 returns to its original starting point. At the same time, the second pusher jack 322 extends using its telescopic end as a fulcrum, moving the second base 210 forward and increasing the thrust to ensure the movement of the second base 210.

[0043] Lower the first top beam 130. Based on the roadway conditions, retract the first bottom-lifting jack 510, causing the first connecting beam 311 to rise to be flush with the first base 110, and raise the second top beam 230. Simultaneously, the second bottom-lifting jack 520 extends downwards, raising the second base 210. Raising the second top beam 230, the pusher 340 uses the second base 210 as a fulcrum, and the first pushing jack 312 extends. The first pushing jack 312 and the pusher 340 simultaneously push the first base 110 forward. Step S: Raise the first top beam 130, lower the second top beam 230, and the pusher 340 uses the first base 110 as a fulcrum. The first pushing jack 312 retracts, and the pusher 340 and the first pushing jack 312 simultaneously drag the second base 210 closer to the first base 110. When the first base 110 crosses... When traversing a muddy geological section, the second base 210 is in the position where the first base 110 has not moved. The telescopic end of the first lifting jack 510 retracts, causing the first connecting beam 311 to return from the second position to the first position (the first and second positions have been described previously and will not be repeated here). The pusher 340 uses the second base 210 as a fulcrum to push the first base 110 forward. The first pusher jack 312 assists by extending from the retracted state using the telescopic end of the first pusher jack 312 as a fulcrum, causing the first base 110 to move forward (the operation is exactly the opposite of the lifting operation of the first base 110 and will not be described in detail). The first top beam 130 rises and contacts the top of the roadway. The operation is reversed, and the second hydraulic support repeats the operation opposite to that of the first hydraulic support to complete the retraction of the second hydraulic support.

[0044] Other working conditions will not be discussed in turn. Different operations are selected according to different working conditions. By setting the connecting component 300, the lower end faces of the first base 110 and the second base 210 are raised to get away from the obstruction of silt and hard soil at the soil quality transition point, reducing contact with the bottom of the roadway and reducing the resistance of hard soil on the first base 110 and the second base 210, making the retraction simpler and more convenient. At the same time, the first connecting beam 311 and the second connecting beam 321 are respectively hinged to the first base 110 and the second base 210, so that there is no stress concentration during normal support. The first connecting beam 311 and the second connecting beam 321 are used to connect and solve the problem of mutual interference when the first base 110 and the second base 210 rise one after another.

[0045] In another embodiment of this application, both the first column 120 and the second column 220 are provided with a rotatable self-resetting device.

[0046] The rotatable self-resetting device adopts the rotatable self-resetting device in the four-column flexible unit type advanced hydraulic support and roadway support method disclosed in Chinese invention patent application number CN116044471A; enabling the first support 100 and the second support 200 to adapt to more roadway top slopes during support.

[0047] In another embodiment of this application, the first connecting beam 311 and the second connecting beam 321 are connected by a hinge 330. The hinge 330 includes a protrusion 331 and a C-shaped groove 332. One end of the protrusion 331 is hinged to the end of the first connecting beam 311 near the second base 210, and the other end of the protrusion 331 is provided with a through hole. One end of the C-shaped groove 332 is connected to the end of the second connecting beam 321 near the first base 110, and the other end of the C-shaped groove 332 is provided with a threaded hole. The end of the protrusion 331 with the through hole extends into the end of the C-shaped groove 332 with the threaded hole, and the through hole corresponds to the threaded hole. The protrusion 331 and the C-shaped groove 332 are detachably connected by bolts.

[0048] Specifically, the end of the first connecting beam 311 near the second base 210 extends out of the first base 110 and is hinged to the protrusion 331 by bolts, pins, or other means. The end of the second connecting beam 321 near the first base 110 extends out of the second base 210 and is provided with a C-groove 332. The protrusion 331 extends into the C-groove 332 and is hinged to the protrusion 331 from a direction perpendicular to the tunnel direction using pins or bolts. This allows the end of the first connecting beam 311 away from the second connecting beam 321 to move downwards, and the end of the first connecting beam 311 extending out of the first base 110 to move upwards and rotate at the hinge point with the protrusion 331. The end of the protrusion 331 away from the first connecting beam 311 does not rise or fall, thus not affecting the second connecting beam 321, and vice versa. This ensures that the vertical rotation of the first connecting beam 311 and the second connecting beam 321 does not cause them to move relative to each other, making the operation simpler and more convenient.

[0049] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A movable four-column hydraulic support assembly, comprising a first support and a second support, wherein the first support includes a first base, a first column, and a first top beam, and the second support includes a second base, a second column, and a second top beam, characterized in that, include: A propulsion component, the two ends of which are respectively connected to the first base and the second base, and the propulsion component can extend and retract along the direction of the tunnel; The lifting assembly includes a first bottom lifting jack and a second bottom lifting jack. The first bottom lifting jack is disposed at the end of the first base away from the second base, and the second bottom lifting jack is disposed at the end of the second base close to the first base. A connecting assembly includes a first connector and a second connector. The first connector is embedded in the lower end face of the first base, and one end of the first connector is slidably connected to the end of the first base away from the first lifting jack. One end of the second connector is hinged to one end of the first connector, and the other end extends into the second base and is slidably connected to the end of the second base away from the second lifting jack. as well as Side baffle plates are detachably mounted on the first top beam, the second top beam, the first base, and the second base.

2. The easily movable four-column hydraulic support assembly as described in claim 1, characterized in that, The first connecting member includes a first connecting beam and a first pushing jack. The lower end face of the first base is provided with a first groove. The first connecting beam slides and is limited in fit with the first groove. The fixed end of the first pushing jack is provided on the upper end face of the first base near the end of the first lifting jack. The telescopic end of the first pushing jack is connected to the end of the first connecting beam away from the first lifting jack.

3. The easily movable four-column hydraulic support assembly as described in claim 2, characterized in that, A first sliding rod is provided on one end of the first connecting beam, and a first sliding groove is provided on the side wall of the first groove. The first sliding rod and the first sliding groove are in a limiting fit, and the length of the first sliding groove is not less than the safe stroke of the first pushing jack.

4. The easily movable four-column hydraulic support assembly as described in claim 2, characterized in that, The second connecting member includes a second connecting beam and a second pushing jack. The lower end face of the second base is provided with a second groove. The second connecting beam slides and is limited to fit the second groove. The fixed end of the second pushing jack is provided on the upper end face of the second base near the end of the second lifting jack. The telescopic end of the second pushing jack is connected to the end of the second connecting beam away from the second lifting jack.

5. The easily movable four-column hydraulic support assembly as described in claim 4, characterized in that, A second sliding rod is provided on one end of the second connecting beam, and a second sliding groove is provided on the side wall of the second groove. The second sliding rod and the second sliding groove are in a limiting fit, and the length of the second sliding groove is not less than the safe stroke of the second pushing jack.

6. The easily movable four-column hydraulic support assembly as described in claim 1, characterized in that, Both the first column and the second column are equipped with a rotatable self-resetting device.

7. The easily movable four-column hydraulic support assembly as described in claim 4, characterized in that, The first connecting beam and the second connecting beam are connected by a hinge.

8. The easily movable four-column hydraulic support assembly as described in claim 7, characterized in that, The hinge includes a protrusion and a C-groove. One end of the protrusion is hinged to the end of the first connecting beam near the second base, and the other end of the protrusion has a through hole. One end of the C-groove is connected to the end of the second connecting beam near the first base, and the other end of the C-groove has a threaded hole. The end of the protrusion with the through hole extends into the end of the C-groove with the threaded hole, and the through hole corresponds to the threaded hole. The protrusion and the C-groove are detachably connected by bolts.

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