Triangular area support bracket convenient to withdraw

Abstract

This application belongs to the field of hydraulic support technology and discloses a triangular zone support support that is easy to retract. It includes a first support, a second support, and a connecting assembly. The first support has its first column and first linkage mechanism connected to a first base and a first top beam at both ends, with a first support plate at one end of the first top beam. The second support has its second column and second linkage mechanism connected to a second base and a second top beam at both ends, with a second support plate at one end of the second top beam. The connecting assembly includes a pusher, with its two ends connected to the first base and the second base, respectively. By changing the orientation of the second linkage mechanism from perpendicular to the first linkage mechanism to parallel to it, the problem of the second linkage mechanism extending beyond the second top beam after retraction is solved. This causes the extended second linkage mechanism to collide with the side wall of the triangular zone when the second support moves, resulting in damage to the second linkage mechanism and reduced support safety.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic support technology, specifically relating to a triangular support support that is easy to retract. Background Technology

[0002] During the relocation of fully mechanized mining equipment, the safe and smooth dismantling of hydraulic supports is crucial to the smooth progress of the entire project. The roof maintenance of the dismantling triangle area is the key point of the hydraulic support dismantling work. Therefore, improving the support method of the dismantling triangle area is of great significance to the smooth progress of the relocation or recovery project.

[0003] In the prior art, for example, Chinese utility model patent application number CN202421232216.6 discloses a triangular support bracket for easy retraction, specifically disclosing a first hydraulic support, a second hydraulic support, and connecting components. The first hydraulic support includes a first base, a first support mechanism, and a first top beam, one end of which has an L-shaped structure. The second hydraulic support includes a second base, a second support mechanism, and a second top beam, the end of which near the first top beam has an inverted L-shaped structure, and the first and second top beams are connected in a cooperative manner. The two ends of the connecting components are respectively connected to the first base and the second base. By setting the first and second top beams as L-shaped and inverted L-shaped structures, a common support area is formed, solving the problem that when the first top beam descends and retracts, large areas of the corresponding support become exposed, easily leading to collapses and landslides. Furthermore, through the cooperative connection of the first and second top beams, the support area remains unchanged, and the stress is stable, thereby effectively improving the safety of the support.

[0004] However, in the above scheme, after the second hydraulic support retracts, a portion of its second support mechanism extends out of the second top beam. During movement, the second support mechanism extending out of the second top beam is prone to colliding with the roadway sidewall, thereby damaging the second support mechanism and reducing its support performance. At the same time, it will cause damage to the roadway sidewall, resulting in a decrease in the safety factor and making it easy for phenomena such as support damage and roadway sidewall collapse and detachment to occur. Summary of the Invention

[0005] Based on this, this application provides a triangular support bracket that is easy to retract, in order to solve the problem that the second support mechanism extends out of the second top beam. During the movement, the second support mechanism extending out of the second top beam is prone to collision with the roadway sidewall, thereby damaging the second support mechanism and reducing its support performance. At the same time, it will also damage the roadway sidewall, resulting in a decrease in the safety factor and easy occurrence of support damage, roadway sidewall collapse and detachment.

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

[0007] A triangular support frame that is easy to retract includes:

[0008] The system comprises a first support, a second support, and a connecting assembly. The first support includes a first base, a first column, a first linkage mechanism, and a first top beam. The first column and the first linkage mechanism are connected at both ends to the first base and the first top beam, respectively. A first support plate is provided at one end of the first top beam, and the first support plate is telescopic along the length of the first top beam. The second support includes a second base, a second column, a second linkage mechanism, and a second top beam. The second column and the second linkage mechanism are connected at both ends to the second base and the second top beam, respectively. A second support plate is provided at one end of the second top beam, and the second support plate is telescopic along the length of the second top beam. The connecting assembly includes a pusher, the two ends of which are connected to the first base and the second base, respectively, for driving the first base or the second base to move in a preset direction. The center lines of the first support and the second support coincide, and the center lines of the first linkage mechanism and the second linkage mechanism also coincide.

[0009] Preferably, a first telescopic jack is provided at one end of the first top beam, and the other end of the first telescopic jack is connected to the first support plate. The first telescopic jack can drive the first support plate to move along the length direction of the first top beam.

[0010] Preferably, a second telescopic jack is provided at one end of the second top beam, and the other end of the second telescopic jack is connected to the second support plate. The second telescopic jack can drive the second support plate to move along the length of the second top beam.

[0011] Preferably, the connecting assembly further includes a first connector and a second connector, the first connector being slidably connected to the lower end face of the first base, one end of the second connector being detachably connected to one end of the first connector, and the second connector being slidably connected to the lower end face of the second base.

[0012] Preferably, the first connecting member includes a first connecting beam, a first lifting jack, and a first pushing jack. The fixed end of the first lifting jack is disposed on the upper surface of the first base, and the telescopic end of the first lifting jack is connected to the first connecting member for lifting the first base. The first connecting beam is slidably disposed on the lower surface of the first base and is hinged to the first base.

[0013] Preferably, the second connecting member includes a second connecting beam, a second lifting jack, and a second pushing jack. The fixed end of the second lifting jack is disposed on the upper surface of the second base, and the telescopic end of the second lifting jack is connected to the second connecting member for lifting the second base. The second connecting beam is slidably disposed on the lower surface of the second base and is hinged to the second base.

[0014] Preferably, the connecting component further includes a first protrusion, a first C-shaped groove, a second protrusion, and a second C-shaped groove. The first C-shaped groove is disposed at one end of the first connector away from the second base, and the first protrusion is disposed at the other end of the first connector. The second C-shaped groove is disposed at one end of the second connector close to the first base, and the second protrusion is disposed at the other end of the second connector. The first protrusion and the second C-shaped groove are detachably connected.

[0015] Preferably, both the first column and the second column are equipped with a rotatable self-resetting device at the end furthest from the bottom of the roadway.

[0016] The technical solution adopted in this application can achieve the following beneficial effects:

[0017] 1. By changing the arrangement direction of the second linkage mechanism from perpendicular to the first linkage mechanism to parallel to the first linkage mechanism, the problem of the second linkage mechanism extending out of the second top beam after retraction is solved. This causes the extended second linkage mechanism to collide with the sidewall of the triangular area when the second support moves, resulting in damage to the second linkage mechanism and reduced support safety. At the same time, the extended second linkage mechanism also solves the problem of damage to the roadway sidewall caused by the roadway sidewall, which leads to a decrease in the safety factor and makes it easy for problems such as support damage and roadway sidewall collapse and detachment to occur.

[0018] 2. By setting a first support plate and a second support plate at the ends of the first and second top beams that are close to each other, the problem of a large amount of roadway top being exposed when the first or second support moves is solved, resulting in a low support area and a decrease in the safety of the support. Attached Figure Description

[0019] Figure 1 Cross-sectional diagram of the prior art Figure 1 .

[0020] Figure 2 Cross-sectional diagram of the prior art Figure 2 .

[0021] Figure 3 This is a cross-sectional view of the triangular support bracket for easy retraction in this application.

[0022] Figure 4 The partial cross-section of the triangular support frame for easy retraction in this application. Figure 1 .

[0023] Figure 5 This is a top view of the triangular support frame for easy retraction in this application.

[0024] Figure 6 The partial cross-section of the triangular support frame for easy retraction in this application. Figure 2 .

[0025] Figure 7 This is a partial side view of the triangular support frame for easy retraction in this application.

[0026] In the diagram: First support mechanism 10, second support mechanism 20, first bracket 100, first base 110, first column 120, first top beam 130, first support plate 131, first telescopic jack 132, first linkage mechanism 140, second bracket 200, second base 210, second column 220, second top beam 230, second support plate 231, second telescopic jack 232, second linkage mechanism 240, connecting component 300, pushing component 310, first connecting component 320, first connecting beam 321, first bottom lifting jack 322, first pushing jack 323, second connecting component 330, second connecting beam 331, second bottom lifting jack 332, second pushing jack 333, first protrusion 241, first C-groove 242, second protrusion 243, second C-groove 244. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Please see Figures 3 to 7 This application provides a retractable triangular support bracket, including a first bracket 100, a second bracket 200, and a connecting assembly 300. The first bracket 100 includes a first base 110, a first column 120, a first linkage mechanism 140, and a first top beam 130. The first column 120 and the first linkage mechanism 140 are respectively connected to the first base 110 and the first top beam 130. A first support plate 131 is provided at one end of the first top beam 130, and the first support plate 131 can extend and retract along the length of the first top beam 130. The second bracket 200 includes a second base 210, a second column 220, a second linkage mechanism 240, and a second top beam 230. The second column 220 and the second linkage mechanism 240 are respectively connected to the second base 210 and the second top beam 230. One end of the second top beam 230 is provided with a second support plate 231, which can extend and retract along the length of the second top beam 230. The connecting assembly 300 includes a pusher 310, the two ends of which are respectively connected to the first base 110 and the second base 210, for driving the first base 110 or the second base 210 to move in a preset direction. The center lines of the first support 100 and the second support 200 coincide, and the center lines of the first linkage mechanism 140 and the second linkage mechanism 240 also coincide.

[0031] Specifically, in the prior art, such as Figure 1 and Figure 2The extension directions of the first support mechanism 10 and the second support mechanism 20 in the first hydraulic support and the second hydraulic support are perpendicular to each other. When retracting, the first hydraulic support is pushed to move with the second hydraulic support as the fulcrum. After the movement is completed, the first hydraulic support rises and the second hydraulic support falls. The second support mechanism 20 near the triangular area retracts, and part of the second support mechanism 20 extends out of the second top beam. When the first hydraulic support moves, the second support mechanism 20 extending out of the second top beam comes into contact with the side wall of the triangular area, which may cause damage to the second support mechanism 20 or the support structure, thereby reducing its safety. In this application, both the first support 100 and the second support 200 adopt, but are not limited to, wide-type four-column hydraulic supports, and the center lines of the first support 100 and the second support 200 (the center line parallel to the roadway direction) coincide, as do the center lines of the first linkage mechanism 140 and the second linkage mechanism 240; the propulsion component 310 adopts hydraulic telescopic columns, hydraulic jacks, etc., preferably hydraulic jacks commonly used in coal mines; the first column 120 adopts double telescopic or triple telescopic columns, as does the second column 220; a first support plate 131 is provided at one end of the first top beam 130 near the second top beam 230, and a second support plate 231 is provided at one end of the second top beam 230 near the first top beam 130; the first support plate 131 and the second support plate 231 move towards or away from each other, and the movement is carried out by means of jacks, sliding rods, etc., and the lower end surfaces of the first support plate 131 and the second support plate 231 are provided with fixing plates for reinforcement.

[0032] Furthermore, during support, both the first support 100 and the second support 200 are in a raised support state (the first support plate 131 and the second support plate 231 are in a retracted state). When retraction is required, the first column 120 and the first linkage mechanism 140 lower and extend the second support plate 231. The pusher 310, with the second base 210 as a fulcrum, extends and pushes the first base 110 to move one step away from the second base 210 (one step is the safe travel distance of the pusher 310). After moving one step, the first... The column 120 and the first linkage mechanism 140 are raised for support, while the second column 220 and the second linkage mechanism 240 are lowered. At the same time, the second support plate 231 is retracted and the first support plate 131 is extended. Then, the pusher 310 uses the first base 110 as a fulcrum, retracts and pulls the second base 210 to move closer to the first base 110. After moving one step, the second column 220 and the second linkage mechanism 240 are raised, while the first support plate 131 is retracted, completing a single movement. If the movement distance is long, the above steps can be repeated.

[0033] Furthermore, upper baffle plates are detachably connected to the first top beam 130 and the second top beam 230, respectively, and lower baffle plates are detachably connected to the first base 110 and the second base 210, respectively. The upper baffle plates and the lower baffle plates adopt, for example, the hydraulic support and the open side baffle plate assembly in the coal mining system disclosed in CN218581632U.

[0034] The technical solution of the triangular zone support bracket that is easy to retract in this application can achieve the following beneficial effects:

[0035] 1. By changing the arrangement direction of the second linkage mechanism 240 from perpendicular to the first linkage mechanism 140 to parallel to the first linkage mechanism 140, the problem of the second linkage mechanism 240 extending out of the second top beam 230 after retraction is solved. This causes the extended second linkage mechanism 240 to collide with the sidewall of the triangular area when the second support 200 moves, resulting in damage to the second linkage mechanism 240 and reduced support safety. At the same time, the extended second linkage mechanism 240 causes damage to the roadway sidewall, leading to a decrease in the safety factor and making it easy for problems such as support damage and roadway sidewall collapse and detachment to occur.

[0036] 2. By setting a first support plate 131 and a second support plate 231 at the ends of the first top beam 130 and the second top beam 230 that are close to each other, the problem of a large amount of roadway top being exposed when the first support 100 or the second support 200 moves is solved, resulting in a low support area and a decrease in the safety of the support.

[0037] Based on the above scheme, a first telescopic jack 132 is provided at one end of the first top beam 130, and the other end of the first telescopic jack 132 is connected to the first support plate 131. The first telescopic jack 132 can drive the first support plate 131 to move along the length direction of the first top beam 130.

[0038] The fixed end of the first telescopic jack 132 is horizontally connected to the interior of the first top beam 130 along its length (connected by a sleeve or bolts). The telescopic end of the first telescopic jack 132 is connected to the lower end face of one end of the first support plate 131. The first support plate 131 is L-shaped and includes a sliding part and a pushing part. One end of the sliding part is connected to one end of the pushing part, and the sliding part is perpendicular to the pushing part. The telescopic end of the first telescopic jack 132 is connected to the end of the pushing part away from the sliding part. A limit block is provided at the end of the sliding part away from the pushing part. A limit groove is provided inside the first top beam 130. The limit groove and the limit block slide and limit each other. One end of the pushing part is flush with the upper end face of the first top beam 130. When the second top beam 230 is lowered, the first telescopic jack 132 extends, causing the first support plate 131 to extend, increasing the support area of ​​the first top beam 130, reducing the exposed area, and improving the safety of the support.

[0039] Based on the above scheme, a second telescopic jack 232 is provided at one end of the second top beam 230, and the other end of the second telescopic jack 232 is connected to the second support plate 231. The second telescopic jack 232 can drive the second support plate 231 to move along the length direction of the second top beam 230.

[0040] The arrangement of the second telescopic jack 232 and the second support plate 231 is the same as the installation arrangement of the first telescopic jack 132 and the first support plate 131. Both the first telescopic jack 132 and the second telescopic jack 232 extend in opposite directions or backwards. When the first support 100 moves, the second telescopic jack 232 extends, causing the second support plate 231 to extend, increasing the support area of ​​the second top beam 230. This improves the safety of the support.

[0041] In one embodiment of this application, the connecting assembly 300 further includes a first connector 320 and a second connector 330. The first connector 320 is slidably connected to the lower end face of the first base 110, one end of the second connector 330 is detachably connected to one end of the first connector 320, and the second connector 330 is slidably connected to the lower end face of the second base 210.

[0042] Furthermore, the first connecting member 320 includes a first connecting beam 321, a first lifting jack 322, and a first pushing jack 323. The fixed end of the first lifting jack 322 is disposed on the upper end surface of the first base 110, and the telescopic end of the first lifting jack 322 is connected to the first connecting member 320 for lifting the first base 110. The first connecting beam 321 is slidably disposed on the lower end surface of the first base 110 and is hinged to the first base 110.

[0043] Furthermore, the second connecting member 330 includes a second connecting beam 331, a second lifting jack 332, and a second pushing jack 333. The fixed end of the second lifting jack 332 is disposed on the upper end surface of the second base 210, and the telescopic end of the second lifting jack 332 is connected to the second connecting member 330 for lifting the second base 210. The second connecting beam 331 is slidably disposed on the lower end surface of the second base 210 and is hinged to the second base 210.

[0044] The first base 110 and the second base 210 have hollowed-out grooves along the centerline of the tunnel. The first connecting beam 321 is embedded in the groove of the first base 110, and the end of the first connecting beam 321 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 322 is perpendicular to and fixedly connected to the upper end surface of the first base 110. The telescopic end of the first lifting jack 322 is connected to the end of the first connecting beam 321 away from the second base 210 by means of a pin, snap-fit, etc., so that when the first lifting jack 322 is in the first position, the first connecting beam 321... The lower end face of 1 is flush with the lower end face of the first base 110. When the first lifting jack 322 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 322 extends downward, causing the first connecting beam 321 to rotate downward along the hinge, thereby lifting the first base 110. The fixed end of the first pushing jack 323 and the fixed end of the first lifting jack 322 are both hinged to the first base 110 using a fixed plate and lug. The telescopic end of the first pushing jack 323 is hinged to the end of the first connecting beam 321 near the second base 210 using lugs, bolts, etc. Similarly, the second connecting beam 331 is embedded in the second... Within the groove of base 210, the end of the second connecting beam 331 furthest from the first support 100 is hinged to the end of the second base 210 furthest from the first base 110 via a pivot, bearing, or other means. The side wall of the fixed end of the second lifting jack 332 is perpendicular to and fixedly connected to the upper surface of the second base 210. The telescopic end of the second lifting jack 332 is connected to the end of the second connecting beam 331 near the first base 110 via a pin, snap-fit, or other means. This ensures that when the second lifting jack 332 is in the third position, the lower surface of the second connecting beam 331 is flush with the lower surface of the second base 210. When the second lifting jack 332 is in the fourth position, the second base 210... The lower end face of the second connecting beam 331 is flush with the bottom of the tunnel, and the second lifting jack 332 extends downward, causing the second connecting beam 331 to rotate downward along the hinge, thereby lifting the second base 210. The fixed end of the second pushing jack 333 and the fixed end of the second lifting jack 332 are both hinged to the second base 210 using a fixed plate lug. The telescopic end of the second pushing jack 333 is hinged to the end of the second connecting beam 331 away from the first base 110 using lugs, bolts, etc. (both the first pushing jack 323 and the second pushing jack 333 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 331 is connected to the end near the first base 110. This connection uses a spherical support, universal joint, or pin hinge to ensure that the rotation of the first connecting beam 321 does not affect the second connecting beam 331. The connection methods of the first linkage mechanism 140, the first column 120, and the first top beam 130 are the same as the installation methods of the second linkage mechanism 240, the second column 220, and the second top beam 230. These can be achieved using, but are not limited to, universal joints or spherical supports. The propulsion component 310 uses, 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 propulsion components 310 are provided, arranged symmetrically on both sides of the center line of the first base 110 and the second base 210.

[0045] When the bottom of the tunnel becomes muddy due to long-term water accumulation, both the first pushing jack 323 and the second pushing jack 333 are in an extended state, while both the first lifting jack 322 and the second lifting jack 332 are in a retracted state. The first lifting jack 322 extends downwards through its telescopic end, moving from a first position to a second position. The end of the first connecting beam 321 near the first lifting jack 322 descends, squeezing the mud and contacting the hard soil beneath it. This reverses the movement, lifting the first base 110 upwards until its lower end is flush with the upper surface of the muddy geology, thus lowering the first column 120 and the second... A linkage mechanism 140 causes the first top beam 130 to move down away from the top of the roadway, and the second top beam 230 to contact the top of the roadway. The pusher 310, with the second base 210 as the fulcrum, extends forward at its telescopic end to push the first base 110 toward the roadway exit. The moving distance depends on the telescopic length of the pusher 310. At the same time, the second pusher jack 333 retracts from its extended state, pulling the second top beam 230 toward the first base 110. Through the cooperation of the pusher 310 and the second pusher jack 333, the pushing is smoother and the thrust is increased to solve the problem of insufficient thrust and difficulty in moving the first base 110 or the second base 210.

[0046] When the first base 110 crosses the silty geological section, the telescopic end of the first lifting jack 322 retracts, causing the first connecting beam 321 to return from the second position to the first position. The first column 120 and the first linkage mechanism 140 extend upwards, bringing the first top beam 130 into contact with the tunnel roof. When the first base 110 is still in the silty geological section, the first lifting jack 322 remains stationary, while the first top beam 130 rises to contact the tunnel roof. Depending on the working conditions, different operations are selected, and the propulsion component 310, using the first base 110 as a fulcrum, drags the second base 210 towards the first base 110. Simultaneously, the second pushing jack 333 assists, using the second connecting beam 331 as a fulcrum to push the second base 210 towards the first base 110. When the second base 210 enters the silty geological condition, the operation of the second lifting jack 332 is similar to that of the first lifting jack 322. The telescopic end of the second lifting jack 332 extends downward, causing the second connecting beam 331 to move downward through the silty geological condition and the hard soil below, thereby raising the lower end surface of the second base 210 to be flush with the upper surface of the silty geological condition. The pushing component 310 then pushes or drags the base 210, while the first pushing jack 323 assists (the operation steps are exactly the opposite of the above operation). This allows the first base 110 and the second base 210 to leave the silty geological condition and retract normally. If the silty geological condition is too long, the first lifting jack 322 and the second lifting jack 332 continue to extend, forcibly pushing or dragging the base 210.

[0047] By setting the connecting component 300, the lower surfaces of the first base 110 and the second base 210 are raised, reducing contact with the ground and lowering the resistance of the ground to the first base 110 and the second base 210, making retraction simpler and more convenient. Simultaneously, a first connecting beam 321 and a second connecting beam 331 are set on the centerline of the first base 110 and the second base 210 in the tunnel direction, making the rise of the first base 110 and the second base 210 more stable and solving the problem of the first support 100 and the second support 210 being affected by the gravity shift of the support. To address the issue of tilting and overturning, the first connecting beam 321 and the second connecting beam 331 are hinged to the first base 110 and the second base 210 respectively, ensuring no stress concentration during normal support. The first connecting beam 321 and the second connecting beam 331 are connected in conjunction to resolve the issue of mutual interference when the first base 110 and the second base 210 rise successively. By setting the first pushing jack 323 and the second pushing jack 333 and cooperating with the pushing component 310, the thrust or pull force is increased, solving the problem of insufficient thrust or pull force.

[0048] In another embodiment of this application, the connecting component 300 further includes a first protrusion 241, a first C-groove 242, a second protrusion 243, and a second C-groove 244. The first C-groove 242 is disposed at one end of the first connector 320 away from the second base 210, and the first protrusion 241 is disposed at the other end of the first connector 320. The second C-groove 244 is disposed at one end of the second connector 330 close to the first base 110, and the second protrusion 243 is disposed at the other end of the second connector 330. The first protrusion and the second C-groove 244 are detachably connected.

[0049] Specifically, the end of the first connecting beam 321 near the second base 210 extends out of the first base 110 and is provided with a first protrusion 241. The first protrusion 241 is hinged to the second C-shaped groove 244 by bolts, pins, or other means. The end of the second connecting beam 331 near the first base 110 extends out of the second base 210 and is provided with a C-shaped groove. The first protrusion 241 extends into the second C-shaped groove 244 and is connected by pins or bolts. This allows the end of the first connecting beam 321 away from the second connecting beam 331 to move downwards, and the end of the first connecting beam 321 extending out of the first base 110 to move upwards. The end of the first connecting beam 321 that is hinged to the first protrusion 241 rotates. The end of the first protrusion 241 away from the first connecting beam 321 does not rise or fall, thus not affecting the second connecting beam 331. The reverse is also true. This ensures that the vertical rotation of the first connecting beam 321 and the second connecting beam 331 does not cause them to move relative to each other, making the operation simpler and more convenient.

[0050] Based on the above scheme, the first column 120 and the second column 220 are both equipped with a rotatable self-resetting device at the end away from the bottom of the roadway.

[0051] 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.

[0052] 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 triangular support frame that is easy to retract, characterized in that, include: The first support includes a first base, a first column, a first linkage mechanism, and a first top beam. The first column and the first linkage mechanism are respectively connected to the first base and the first top beam at both ends. A first support plate is provided at one end of the first top beam. The first support plate can extend and retract along the length of the first top beam. The second support includes a second base, a second column, a second linkage mechanism, and a second top beam. The two ends of the second column and the second linkage mechanism are respectively connected to the second base and the second top beam. One end of the second top beam is provided with a second support plate, which can extend and retract along the length of the second top beam. as well as A connecting component includes a propulsion member, the two ends of which are respectively connected to the first base and the second base, for driving the first base or the second base to move in a preset direction; wherein the center lines of the first bracket and the second bracket coincide, and the center lines of the first linkage mechanism and the second linkage mechanism also coincide.

2. The easily retractable triangular support frame as described in claim 1, characterized in that, One end of the first top beam is provided with a first telescopic jack, and the other end of the first telescopic jack is connected to the first support plate. The first telescopic jack can drive the first support plate to move along the length of the first top beam.

3. The easily retractable triangular support frame as described in claim 1, characterized in that, A second telescopic jack is provided at one end of the second top beam, and the other end of the second telescopic jack is connected to the second support plate. The second telescopic jack can drive the second support plate to move along the length of the second top beam.

4. The easily retractable triangular support frame as described in claim 1, characterized in that, The connecting assembly further includes a first connector and a second connector. The first connector is slidably connected to the lower end face of the first base. One end of the second connector is detachably connected to one end of the first connector, and the second connector is slidably connected to the lower end face of the second base.

5. The easily retractable triangular support frame as described in claim 4, characterized in that, The first connecting member includes a first connecting beam, a first lifting jack, and a first pushing jack. The fixed end of the first lifting jack is disposed on the upper surface of the first base, and the telescopic end of the first lifting jack is connected to the first connecting member for lifting the first base. The first connecting beam is slidably disposed on the lower surface of the first base and is hinged to the first base.

6. The easily retractable triangular support frame as described in claim 4, characterized in that, The second connecting member includes a second connecting beam, a second lifting jack, and a second pushing jack. The fixed end of the second lifting jack is disposed on the upper surface of the second base, and the telescopic end of the second lifting jack is connected to the second connecting member for lifting the second base. The second connecting beam is slidably disposed on the lower surface of the second base and is hinged to the second base.

7. The easily retractable triangular support frame as described in claim 4, characterized in that, The connecting component further includes a first protrusion, a first C-groove, a second protrusion, and a second C-groove. The first C-groove is located at the end of the first connector away from the second base, and the first protrusion is located at the other end of the first connector. The second C-groove is located at the end of the second connector close to the first base, and the second protrusion is located at the other end of the second connector. The first protrusion and the second C-groove are detachably connected.

8. The easily retractable triangular support frame as described in claim 1, characterized in that, Both the first column and the second column are equipped with a rotatable self-resetting device at the end furthest from the bottom of the roadway.

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