Triangular area supporting bracket convenient to withdraw

Abstract

The triangular area supporting support convenient to withdraw comprises a first hydraulic support, a second hydraulic support and a connecting assembly, the first hydraulic support comprises a first base, a first supporting mechanism and a first top beam, and one end of the first top beam is of an L-shaped structure; the second hydraulic support comprises a second base, a second supporting mechanism and a second top beam, the end, close to the first top beam, of the second top beam is of an inverted-L-shaped structure, and the first top beam is connected with the second top beam in a matched mode; two ends of the connecting assembly are respectively connected with the first base and the second base. The first top beam and the second top beam are arranged to be of an L-shaped structure and an inverted-L-shaped structure, a public supporting area is formed, the problems that when the first top beam descends and retracts, the corresponding supporting position is exposed in a large area, collapse, landslide and other phenomena are prone to occurring are solved, through matched connection of the first top beam and the second top beam, the supporting area is not changed, stress is stable, and the supporting effect is good. Therefore, the safety of supporting is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mine support, in particular to a triangular area support bracket which is easy to withdraw. Background Art

[0002] During the relocation or recovery of the comprehensive mining equipment, the safe and smooth removal of the hydraulic support is the key to whether the entire project can proceed smoothly, and the maintenance of the roof of the support triangle is the focus of the hydraulic support removal work. Therefore, improving the support method of the support triangle is of great significance to the smooth progress of the relocation or recovery project. In the existing technology, for example, the Chinese utility model patent with the publication number CN111365052A discloses a new triangle area support device, which specifically discloses a first support unit and a second support unit. The first support unit includes a vertically arranged first vertical telescopic member, a first top support member, a first base member, a first side support member, a first connecting rod and a third side support member, and the second support unit includes a second vertical telescopic member, a second top support member, a second base member, a second side support member, a second connecting rod and a fourth side support member. The device described in the utility model is provided with a supporting method combining a top support member and a side support member to increase the supporting strength; a third support member and a fourth support member are used to support the side of the coal mine, which is safer; a telescopic plate that can be simultaneously extended and retracted to the front and rear ends is used to increase the supporting area. However, when the first supporting unit moves downward, a large area of ​​space is exposed at the supporting position corresponding to the first supporting unit, which is prone to collapse, landslide and the like. Summary of the invention

[0003] Based on this, it is necessary to provide a triangular area support bracket that is easy to withdraw to address the problem that when the first support unit descends and moves, a large area of ​​space is exposed at the support corresponding to the first support unit, which is prone to collapse, landslide and other phenomena.

[0004] In order to achieve the above purpose, the utility model adopts the following scheme:

[0005] A triangular area support bracket that is easy to withdraw, comprising:

[0006] A first hydraulic support, a second hydraulic support and a connecting assembly, the first hydraulic support includes a first base, a first supporting mechanism and a first top beam, one end of the first supporting mechanism is connected to the upper end surface of the first base, one end of the first supporting mechanism away from the first base is hinged to the lower end surface of the first top beam, and one end of the first top beam is an L-shaped structure; the second hydraulic support includes a second base, a second supporting mechanism and a second top beam, the second base is arranged at one end of the first base, one end of the second supporting mechanism is connected to the upper end surface of the second base, one end of the second supporting mechanism away from the second base is hinged to the lower end surface of the second top beam, one end of the second top beam close to the first top beam is an inverted L-shaped structure, and one end of the first top beam close to the second top beam is cooperatively connected with one end of the second top beam close to the first top beam; the two ends of the connecting assembly are respectively connected to the first base and the second base.

[0007] Preferably, the connecting assembly includes a first connecting beam, a second connecting beam, a first lifting jack, a second lifting jack and a propulsion member, the first connecting beam passes through the first base and the end of the first connecting beam close to the second base is hinged to the end of the first base close to the second base, the second connecting beam passes through the second base and the end of the second connecting beam away from the first base is hinged to the end of the second base away from the first base, and the second connecting beam is hinged to the first connecting beam, the first lifting jack is arranged at an end of the first base away from the second base and connected to an end of the first connecting beam away from the second base, the second lifting jack is arranged at an end of the second base close to the first base and connected to an end of the second connecting beam close to the first base, and the two ends of the propulsion member are respectively connected to the first base and the second base.

[0008] Preferably, a slide groove is provided at one end of the second connecting beam away from the first base, and the second base is hinged to the second connecting beam via a rotating shaft passing through the slide groove, and the rotating shaft can slide along the slide groove.

[0009] Preferably, a protrusion is provided at one end of the first connecting beam close to the second base, and a groove is provided at one end of the second connecting beam close to the first base, the protrusion extends into the groove, and a bolt is used to penetrate the groove and the protrusion.

[0010] Preferably, the first supporting mechanism includes a first hydraulic component and a second hydraulic component, and the first hydraulic component and the second hydraulic component are symmetrically arranged on the first base. The arrangement direction of the first hydraulic component and the second hydraulic component is perpendicular to the direction of the lane, and the second hydraulic component is arranged in parallel on a side of the first hydraulic component close to the second base.

[0011] Preferably, the first supporting mechanism also includes a first four-link rod, one end of the first four-link rod is hinged to the upper end surface of the first base, the end away from the first base is hinged to an end of the first top beam close to the first hydraulic assembly, and the action direction of the first four-link rod is perpendicular to the direction of the tunnel.

[0012] Preferably, the second supporting mechanism comprises a third hydraulic component and a fourth hydraulic component, and the third hydraulic component and the fourth hydraulic component are symmetrically arranged on the second base and parallel to the direction of the lane.

[0013] Preferably, the second supporting mechanism also includes a second four-link rod, one end of the second four-link rod is hinged to the upper end surface of the second base, the end away from the second base is hinged to the side of the second top beam close to the fourth hydraulic assembly, and the action direction of the second four-link rod is parallel to the direction of the tunnel.

[0014] Preferably, a rotation resetting device is disposed at one end of each of the first supporting mechanism and the second supporting mechanism.

[0015] Preferably, a telescopic jack is provided on one side of the second top beam, a telescopic end of the telescopic jack is connected to a baffle, and an end of the baffle away from the telescopic jack is hinged to one side of the second top beam.

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

[0017] By setting one end of the first top beam and one end of the second top beam as an L-shaped structure and an inverted L-shaped structure, a common support area is formed, which solves the problem that when the first top beam is lowered and withdrawn, a large area of ​​​​the corresponding support is exposed, which is prone to collapse, landslides and the like. In addition, through the coordinated connection between the first top beam and the second top beam, the support area remains unchanged and the force is stable, thereby effectively improving the safety of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of the triangular area support bracket that is easy to withdraw disclosed in an embodiment of the present application.

[0019] Figure 2 A side view of a second hydraulic support of a triangular area support support that is easy to withdraw disclosed in an embodiment of the present application.

[0020] Figure 3 A partial connection diagram of the triangular area support bracket for easy withdrawal disclosed in an embodiment of the present application.

[0021] Figure 4 This is a partial layout diagram of the triangular area support bracket that is easy to withdraw disclosed in an embodiment of the present application.

[0022] Figure 5 A partial top view of the triangular area support bracket for easy withdrawal disclosed in an embodiment of the present application.

[0023] Figure 6 A schematic diagram of the support of a triangular area support bracket that is easy to withdraw disclosed in an embodiment of the present application.

[0024] Among them: the first base 110, the first supporting mechanism 120, the first hydraulic component 121, the second hydraulic component 122, the first top beam 130, the second hydraulic support 200, the second base 210, the second telescopic jack 211, the second baffle 212, the second supporting mechanism 220, the third hydraulic component 221, the fourth hydraulic component 222, the second top beam 230, the telescopic jack 231, the baffle 232, the connecting component 300, the first connecting beam 310, the second connecting beam 320, the slide groove 321, the rotating shaft 322, the first bottom lifting jack 330, the second bottom lifting jack 340, the thruster 350, the protrusion 360, and the groove 370. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0026] It should be noted that when a device is considered to be "connected" to another device, it may be directly connected to the other device or there may be an intermediate device at the same time. The terms "inside", "top", "upper", "lower", "upper", "lower" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] See also Figures 1 to 6The present application provides a triangular area support support that is easy to withdraw, including: a first hydraulic support, a second hydraulic support 200 and a connecting assembly 300, the first hydraulic support includes a first base 110, a first supporting mechanism 120 and a first top beam 130, one end of the first supporting mechanism 120 is connected to the upper end surface of the first base 110, the end of the first supporting mechanism 120 away from the first base 110 is hinged to the lower end surface of the first top beam 130, and one end of the first top beam 130 is an L-shaped structure; the second hydraulic support 200 includes a second base 210, a second supporting mechanism 220 and a second top beam 230, The second base 210 is arranged at one end of the first base 110, one end of the second supporting mechanism 220 is connected to the upper end surface of the second base 210, the end of the second supporting mechanism 220 away from the second base 210 is hinged to the lower end surface of the second top beam 230, the end of the second top beam 230 close to the first top beam 130 is an inverted L-shaped structure, and the end of the first top beam 130 close to the second top beam 230 is cooperatively connected with the end of the second top beam 230 close to the first top beam 130; the two ends of the connecting component 300 are respectively connected to the first base 110 and the second base 210.

[0029] Specifically, see Figure 5 and Figure 6 A row of supports to be withdrawn is arranged along the direction of the tunnel, and the number of supports to be withdrawn is several. Several retreat supports are arranged at the end of the tunnel, and the support direction of the retreat support is perpendicular to the support direction of the support to be withdrawn. The temporary support support in the triangular area formed by the retreat support and the support to be withdrawn is convenient for withdrawal. The first hydraulic support is relatively close to the support to be withdrawn, and the second hydraulic support 200 is arranged behind the first hydraulic support and close to the retreat support. The first hydraulic support and the second hydraulic support 200 both adopt but are not limited to four-column support hydraulic supports, two-column shielding hydraulic supports and other temporary support supports for triangular areas in coal mines that are convenient for withdrawal. The first support mechanism 120 and the second support mechanism 220 adopt but are not limited to hydraulic, pneumatic and other support mechanisms with telescopic functions, and four-link hydraulic supports may also be used. The first top beam 130 and the second top beam 230 rise to the same height and are level with each other to form a rectangular support, and the extended ends of the L-shaped structures of the first top beam 130 and the second top beam 230 are both half the length of the first top beam 130. When the first hydraulic support and the second hydraulic support 200 are supporting, one end of the first top beam 130 close to the second top beam 230 and one end of the second top beam 230 close to the first top beam 130 form a common support area.

[0030] When the first hydraulic support and the second hydraulic support 200 need to be withdrawn, the first top beam 130 descends, the second top beam 230 continues to provide support, and the public support area is still supported by the second top beam 230. When the first hydraulic support is withdrawn into place, the first top beam 130 rises for support, the second top beam 230 descends again, and the second hydraulic support 200 moves toward one end of the first hydraulic support. After it is in place, the second top beam 230 is raised to cooperate and connect with the first top beam 130 to continue supporting.

[0031] The technical solution adopted in this application can achieve the following beneficial effects:

[0032] By setting one end of the first top beam 130 and one end of the second top beam 230 as an L-shaped structure and an inverted L-shaped structure, a common support area is formed, which solves the problem that when the first top beam 130 is lowered and withdrawn, a large area of ​​the corresponding support is exposed, which is prone to collapse, landslides, etc.; and through the coordinated connection between the first top beam 130 and the second top beam 230, the support area remains unchanged and the force is stable, thereby effectively improving the safety of the support.

[0033] Based on the above scheme, the connecting assembly 300 includes a first connecting beam 310, a second connecting beam 320, a first lifting jack, a second lifting jack and a propulsion member 350, the first connecting beam 310 passes through the first base 110 and the end of the first connecting beam 310 close to the second base 210 is hinged to the end of the first base 110 close to the second base 210, the second connecting beam 320 passes through the second base 210 and the end of the second connecting beam 320 away from the first base 110 is hinged to the end of the second base 210 away from the first base 110, and the second connecting beam 320 is hinged to the first connecting beam 310, the first lifting jack is arranged at the end of the first base 110 away from the second base 210 and is connected to the end of the first connecting beam 310 away from the second base 210, the second lifting jack is arranged at the end of the second base 210 close to the first base 110 and is connected to the end of the second connecting beam 320 close to the first base 110, and the two ends of the propulsion member are respectively connected to the first base 110 and the second base 210.

[0034] Specifically, a hollow groove 370 is provided along the center line of the first base 110 and the second base 210 along the direction of the lane, the first connecting beam 310 is embedded in the groove 370 of the first base 110, and the end of the first connecting beam 310 close to the second hydraulic support 200 is hinged to the end of the first base 110 close to the second base 210 by means of a rotating shaft 322, a bearing, etc., the side wall of the fixed end of the first bottom lifting jack 330 is perpendicular to and fixedly connected to the upper end surface of the first base 110, and the telescopic end of the first bottom lifting jack 330 is connected to the end of the first connecting beam 310 away from the second base 210 by means of a latch, a snap connection, etc., so that when the first bottom lifting jack 330 is in the first position, the first connecting beam 310 The lower end surface is flush with the lower end surface of the first base 110. When the first bottom lifting jack 330 is in the second position, the lower end surface of the first base 110 is flush with the bottom of the tunnel, and the first bottom lifting jack 330 extends downward, so that the first connecting beam 310 rotates downward along the hinge, thereby realizing the lifting of the first base 110. Similarly, the second connecting beam 320 is embedded in the groove 370 of the second base 210, and the end of the second connecting beam 320 away from the first hydraulic support is hinged to the end of the second base 210 away from the first base 110 by means of a rotating shaft 322, a bearing, etc. The side wall of the fixed end of the second bottom lifting jack 340 is perpendicular to and fixedly connected to the upper end surface of the second base 210, and the extension of the second bottom lifting jack 340 The contracted end is connected to the end of the second connecting beam 320 close to the first base 110 by means of a latch, a snap connection, etc., so that when the second bottom lifting jack 340 is in the third position, the lower end surface of the second connecting beam 320 is flush with the lower end surface of the second base 210. When the second bottom lifting jack 340 is in the fourth position, the lower end surface of the second base 210 is flush with the bottom of the tunnel, the second connecting beam 320 is in contact with the tunnel ground, and the second bottom lifting jack 340 extends downward, so that the second connecting beam 320 rotates downward along the hinge, thereby realizing the lifting of the second base 210; the second connecting beam 320 is connected to the end close to the first base 110, and the connection is connected by a spherical support, a universal joint, a latch hinge, etc. to ensure that the first connection The rotation of the beam 310 has no influence on the connecting shaft 322 of the second connecting beam 320. The connection method of the first supporting mechanism 120 and the first top beam 130 is the same as the installation method of the second supporting mechanism 220 and the second top beam 230. They can be connected by means of but not limited to universal joints, spherical bearings, etc. The thruster 350 adopts but is not limited to hydraulic, pneumatic, or other one-way or two-way telescopic jacks 231. The telescopic end is fixedly connected to one end of the first base 110 close to the second base 210, and the fixed end is fixedly connected to one end of the second base 210 close to the first base 110. Two thrusters 350 are arranged, and the two thrusters 350 are arranged in an axially symmetrical manner on both sides of the center line of the first base 110 and the second base 210.

[0035] When the support to be withdrawn is withdrawn one end near the temporary support support in the triangular area that is easy to withdraw, and the bottom of the tunnel is muddy due to long-term water accumulation under the base of the withdrawn support to be withdrawn, the telescopic end of the first lifting jack is extended downward, so that the end of the first connecting beam 310 close to the first lifting jack is lowered, the silt is squeezed and contacts with the hard soil under the silt, and the first base 110 is lifted upward in the opposite direction, so that the lower end surface of the first base 110 is flush with the upper surface of the muddy geology, and the first base 110 is lowered. A supporting mechanism 120 moves the first top beam 130 downward away from the top of the tunnel, and the second top beam 230 contacts the top of the tunnel. The pusher 350 uses the second base 210 as a fulcrum, and the telescopic end extends forward to push the first base 110 to move toward the tunnel exit. The moving distance depends on the telescopic length of the pusher 350. When the first base 110 crosses the muddy geological section, the telescopic end of the first lifting jack retracts back and returns the first connecting beam 310 from the second position to the first position, and extends upward. The first supporting mechanism 120 makes the first top beam 130 contact with the top of the tunnel. When the first base 110 is still in the muddy geological section, the first lifting jack does not move, and the first top beam 130 rises and contacts with the top of the tunnel. Different operations are selected according to different working conditions, and the propulsion member 350 uses the first base 110 as a fulcrum to drag the second base 210 toward the direction of the first base 110. When the second base 210 enters the muddy geological condition, the operation of the second lifting jack is the same as that of the first lifting jack. The operation is similar. The telescopic end of the second lifting jack extends downward to move the second connecting beam 320 downward through the muddy geology and the hard soil below, so that the lower end surface of the second base 210 rises and is flush with the upper surface of the muddy geology, and is pushed or dragged by the propulsion member 350 to make the first base 110 and the second base 210 leave the muddy geology and withdraw normally. If the muddy geology is too long, the first lifting jack and the second lifting jack continue to extend and forcefully push or drag.

[0036] By setting the connecting assembly 300, the lower end surfaces of the first base 110 and the second base 210 are raised, the contact with the ground is reduced, the resistance of the ground to the first base 110 and the second base 210 is reduced, and the withdrawal is simpler and more convenient. At the same time, the first connecting beam 310 and the second connecting beam 320 are set on the center line of the direction of the lane of the first base 110 and the second base 210, so that the rise of the first base 110 and the second base 210 is more stable, and the problem of the first hydraulic support 200 tilting and overturning caused by the support gravity offset is solved. The first connecting beam 310 and the second connecting beam 320 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 310 and the second connecting beam 320 are used to cooperate and connect, so as to solve the problem of the first base 110 and the second base 210 rising successively and influencing each other. By setting the first push jack and the second push jack and cooperating with the propeller 350, the thrust or pulling force is increased to solve the problem of insufficient thrust or pulling force.

[0037] In a preferred embodiment, a slide groove 321 is provided at one end of the second connecting beam 320 away from the first base 110 , and the second base 210 is hinged to the second connecting beam 320 via a rotating shaft 322 passing through the slide groove 321 , and the rotating shaft 322 can slide along the slide groove 321 .

[0038] Specifically, a long strip-shaped slide groove 321 is provided in the middle of the end of the second connecting beam 320 away from the first base 110, and the length of the slide groove 321 is not less than the telescopic length of the propulsion member 350. The rotating shaft 322 passes through the slide groove 321, and both ends extend into the second base 210 and are rotatably connected. When the end of the first connecting beam 310 away from the second base 210 is driven downward by the second bottom lifting jack 340, the first connecting beam 310 rotates along the rotating shaft 322, thereby realizing the lifting of the first base 110. When the propulsion member 350 uses the second base 210 as a fulcrum to push the first base 110 forward, the rotating shaft 322 slides along the end of the slide groove 321 close to the first base 110 toward the end of the slide groove 321 away from the first base 110, thereby realizing the movement of the first base 110. Conversely, when the propulsion member 350 is pushed forward with the second base 210 as a fulcrum, the rotating shaft 322 slides along the end of the slide groove 321 close to the first base 110 toward the end of the slide groove 321 away from the first base 110, thereby realizing the movement of the first base 110. When the first base 110 is used as a fulcrum, the rotating shaft 322 is at the end of the slide groove 321 away from the first base 110. Through the dragging of the propulsion member 350, the rotating shaft 322 slides along the end of the slide groove 321 away from the first base 110 toward the end of the slide groove 321 close to the first base 110, thereby realizing the movement of the second base 210. At the same time, the end of the second connecting beam 320 away from the first base 110 is flush with the end of the second base 210 away from the first base 110, which makes the operation simpler and more convenient. By setting the slide groove 321, the first connecting beam 310 and the second connecting beam 320 are extended in the same straight line each time, which solves the problem of offset during movement, difficulty in adjustment and long time consumption. Similarly, the first connecting beam 310 is also provided with the same slide groove 321 as the second connecting beam 320.

[0039] In the optimized solution, a protrusion 360 is provided at one end of the first connecting beam 310 close to the second base 210, and a groove 370 is provided at one end of the second connecting beam 320 close to the first base 110. The protrusion 360 extends into the groove 370, and a bolt is used to penetrate the groove 370 and the protrusion 360.

[0040] Specifically, one end of the first connecting beam 310 close to the second base 210 extends out of the first base 110 and is hinged to the protrusion 360 by means of bolts, latches, etc., and one end of the second connecting beam 320 close to the first base 110 extends out of the second base 210 and is provided with a groove 370, into which the protrusion 360 extends, and a latch or bolt is used to hinge the groove 370 and the protrusion 360 in a direction perpendicular to the direction of the lane, thereby realizing that the end of the first connecting beam 310 away from the second connecting beam 320 moves downward, and the end of the first connecting beam 310 extending out of the first base 110 moves upward and rotates at the hinge with the protrusion 360, and the end of the protrusion 360 away from the first connecting beam 310 does not rise or fall, thereby not affecting the second connecting beam 320, and vice versa, so that the up and down rotation of the first connecting beam 310 and the second connecting beam 320 do not move relative to each other, making the operation simpler and more convenient.

[0041] In a more preferred embodiment, the first supporting mechanism 120 includes a first hydraulic component 121 and a second hydraulic component 122, and the first hydraulic component 121 and the second hydraulic component 122 are symmetrically arranged on the first base 110, and the arrangement direction of the first hydraulic component 121 and the second hydraulic component 122 is perpendicular to the direction of the lane, and the second hydraulic component 122 is arranged in parallel on the side of the first hydraulic component 121 close to the second base 210.

[0042] Specifically, the first hydraulic component includes two columns, and the columns adopt existing devices such as but not limited to hydraulic cylinders and telescopic columns. The central connecting line of the horizontal projections of the two columns is perpendicular to the direction of the tunnel. The second hydraulic component 122 is parallel to the first hydraulic component 121, and the two columns of the first hydraulic component 121 are controlled simultaneously, and the two columns of the second hydraulic component 122 are controlled simultaneously, and the first hydraulic component 121 and the second hydraulic component 122 are independently controlled. When the first hydraulic support reaches the temporary support area, the two columns of the first hydraulic component 121 are controlled to extend upward at the same time to support the top of the tunnel, and then the two columns of the second hydraulic component 122 are raised again until the first top beam 130 is completely in contact with the top of the tunnel. Through the independent control of the first hydraulic component 121 and the second hydraulic component 122, they control and cooperate with each other and successively contact the top of the tunnel, so as to adapt to the top of the tunnel with any slope, and the operation is simpler, more convenient and safer.

[0043] Based on the above scheme, the first support mechanism 120 also includes a first four-link rod, one end of which is hinged to the upper end surface of the first base 110, and the end away from the first base 110 is hinged to the end of the first top beam 130 close to the first hydraulic assembly 121, and the action direction of the first four-link rod is perpendicular to the direction of the lane. The end of the first four-link rod close to the first top beam 130 is arranged between the two columns of the first hydraulic assembly 121, and is controlled simultaneously with the first hydraulic assembly 121, so that the action direction of the first four-link rod is the same as the action direction of the first hydraulic assembly 121, and both are parallel to the direction of the lane. The first four-link rod makes the horizontal force borne by the first hydraulic support larger and more stable. At the same time, according to the height change of the first support mechanism 120, with the help of the action of the first four-link rod, the first top beam 130 and the top of the lane are more stable and firm, and the distance change is small, so as to avoid bumping and damaging the top of the lane.

[0044] In the preferred solution, the second support mechanism 220 includes a third hydraulic assembly 221 and a fourth hydraulic assembly 222, which are symmetrically arranged on the second base 210 and parallel to the direction of the lane. Specifically, the third hydraulic assembly 221 and the fourth hydraulic assembly 222 each include two columns, and the columns are made of but not limited to existing devices such as hydraulic cylinders and telescopic columns, and the line connecting the midpoints of the horizontal projections of the two columns of the third hydraulic assembly 221 is parallel to the direction of the lane, and is perpendicular to the line connecting the midpoints of the horizontal projections of the first hydraulic assembly 121 and the second hydraulic assembly 122. By changing the support direction of the second support mechanism 220, the stability of the support is improved, the compressive bearing capacity of the second support mechanism 220 is made higher, and the overload risk of the second support mechanism 220 is reduced.

[0045] Based on the above scheme, the second support mechanism 220 also includes a second four-link rod, one end of which is hinged to the upper end surface of the second base 210, and the end away from the second base 210 is hinged to the side of the second top beam 230 close to the fourth hydraulic assembly 222, and the action direction of the second four-link rod is parallel to the direction of the lane. For example, the end of the second four-link rod away from the second base 210 is arranged between the two columns of the fourth hydraulic assembly 222, and the second four-link rod and the fourth hydraulic assembly 222 are both away from the side of the triangular area support, and the second four-link rod and the fourth hydraulic assembly 222 are controlled simultaneously. By setting the second four-link rod, the bearing capacity of the side of the triangular area support is increased, the stability is improved, and the probability of occurrence of safety hazards is reduced.

[0046] Specifically, a rotation reset device is provided at one end of the first support mechanism 120 and the second support mechanism 220. The first support mechanism 120 and the second support mechanism 220 both use a rotation reset device such as the one disclosed in the publication number CNA, and the specific structure is not repeated. When the first support mechanism 120 rises, the rotation reset device automatically adjusts the first top beam 130 according to the slope of the top of the tunnel when the first support mechanism 120 contacts the top of the tunnel, so that the upper end surface of the first top beam 130 contacts the top of the tunnel completely, increasing the contact area and avoiding stress concentration, which may cause damage to the first top beam 130 or collapse of the top of the tunnel. Similarly, the second support mechanism 220 and the second top beam 230 are also connected by the rotation reset device, which plays the same role as the first top beam 130 and the second top beam 230, when they are spaced apart from each other and contact the top of the tunnel, the contact area is the maximum contact area, so that the stability and safety are higher.

[0047] In a more preferred embodiment, a telescopic jack 231 is provided on one side of the second top beam 230 , a baffle 232 is connected to the telescopic end of the telescopic jack 231 , and an end of the baffle 232 away from the telescopic jack 231 is hinged to one side of the second top beam 230 .

[0048] Specifically, the fixed end of the telescopic jack 231 extends into the interior of the second top beam 230. When the telescopic end of the telescopic jack 231 is not extended, it is flush with the side wall of the second top beam 230. The bottom of the baffle 232 is fixedly connected to the telescopic end of the telescopic jack 231. The top of the baffle 232 is hinged to one end of the second top beam 230 using bolts, bearings, etc. When the telescopic end of the telescopic jack 231 is extended, the lower part of the baffle 232 is flipped upward along the hinge of the baffle 232 until it is supported on the top of the triangular area. By increasing the support area, the stability of the support is improved, and the phenomenon of landslides or slopes caused by imperfect support in the triangular area can be avoided.

[0049] More specifically, a guard plate is hinged at one end of the first top beam 130 away from the second top beam 230, thereby increasing the supporting area. A safety rope is provided at one end of the guard plate away from the first top beam 130, and the other end of the safety rope is connected to one end of the first connecting beam 310 away from the second base 210. By connecting them together with a safety rope, it becomes safer and more stable, thereby improving the safety of operation.

[0050] Furthermore, a second telescopic jack 211 is provided on one side of the second base 210, and a second baffle 212 is connected to the telescopic end of the second telescopic jack 211. For example, the fixed end of the second telescopic jack 211 is fixed obliquely or fixed to one end of the second base 210 by a snap-on method, and the telescopic end of the second telescopic jack 211 is extended obliquely from bottom to top, so that the second baffle 212 supports the lower part of the triangular area from below, and the second baffle 212 cooperates with the baffle 232, and the second telescopic jack 211 is provided at one end of the third hydraulic assembly 221 and close to one side of the triangular area, so that the side wall of the triangular area is more fully supported, the exposed area of ​​the support is reduced, and the problem of landslide or stepping on the slope in the triangular area is solved, thereby improving the safety of the support.

[0051] The above-described embodiments only express the way of equipment layout of the present application, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application; it should be pointed out that for ordinary technicians in this field, several adjustments and improvements can be made without departing from the concept of the present application, which all belong to the scope of protection of the present application; therefore, the scope of protection of the patent of this application shall be based on the attached claims.

Claims

1. A triangular area support bracket that is easy to withdraw, characterized in that: include: A first hydraulic support, wherein the first hydraulic support comprises a first base, a first supporting mechanism and a first top beam, wherein one end of the first supporting mechanism is connected to an upper end surface of the first base, one end of the first supporting mechanism away from the first base is hinged to a lower end surface of the first top beam, and one end of the first top beam is an L-shaped structure; A second hydraulic support, wherein the second hydraulic support comprises a second base, a second supporting mechanism and a second top beam, wherein the second base is arranged at one end of the first base, one end of the second supporting mechanism is connected to the upper end surface of the second base, one end of the second supporting mechanism away from the second base is hinged to the lower end surface of the second top beam, one end of the second top beam close to the first top beam is an inverted L-shaped structure, and one end of the first top beam close to the second top beam is cooperatively connected to one end of the second top beam close to the first top beam; as well as A connecting component, two ends of which are respectively connected to the first base and the second base.

2. The triangular area support bracket that is easy to withdraw as claimed in claim 1 is characterized in that: The connecting assembly includes a first connecting beam, a second connecting beam, a first lifting jack, a second lifting jack and a propulsion member, the first connecting beam passes through the first base and one end of the first connecting beam close to the second base is hinged to one end of the first base close to the second base, the second connecting beam passes through the second base and one end of the second connecting beam away from the first base is hinged to one end of the second base away from the first base, and the second connecting beam is hinged to the first connecting beam, the first lifting jack is arranged at one end of the first base away from the second base and connected to one end of the first connecting beam away from the second base, the second lifting jack is arranged at one end of the second base close to the first base and connected to one end of the second connecting beam close to the first base, and the two ends of the propulsion member are respectively connected to the first base and the second base.

3. The triangular area support bracket that is easy to withdraw as claimed in claim 2, characterized in that: A sliding groove is arranged at one end of the second connecting beam away from the first base, and the second base is hinged to the second connecting beam via a rotating shaft passing through the sliding groove, and the rotating shaft can slide along the sliding groove.

4. The triangular area support bracket that is easy to withdraw as claimed in claim 3 is characterized in that: A protrusion is arranged at one end of the first connecting beam close to the second base, and a groove is arranged at one end of the second connecting beam close to the first base. The protrusion extends into the groove, and a bolt is used to penetrate the groove and the protrusion.

5. The triangular area support bracket that is easy to withdraw as claimed in claim 1, characterized in that: The first supporting mechanism includes a first hydraulic component and a second hydraulic component, and the first hydraulic component and the second hydraulic component are symmetrically arranged on the first base. The arrangement direction of the first hydraulic component and the second hydraulic component is perpendicular to the direction of the lane, and the second hydraulic component is arranged in parallel on a side of the first hydraulic component close to the second base.

6. The triangular area support bracket that is easy to withdraw as claimed in claim 5, characterized in that: The first supporting mechanism also includes a first four-link rod, one end of which is hinged to the upper end surface of the first base, and the end away from the first base is hinged to the end of the first top beam close to the first hydraulic assembly, and the action direction of the first four-link rod is perpendicular to the direction of the tunnel.

7. The triangular area support bracket that is easy to withdraw as claimed in claim 1, characterized in that: The second supporting mechanism includes a third hydraulic component and a fourth hydraulic component. The third hydraulic component and the fourth hydraulic component are symmetrically arranged on the second base and parallel to the direction of the lane.

8. The triangular area support bracket that is easy to withdraw as claimed in claim 7, characterized in that: The second supporting mechanism also includes a second four-link rod, one end of which is hinged to the upper end surface of the second base, and one end away from the second base is hinged to the side of the second top beam close to the fourth hydraulic assembly, and the action direction of the second four-link rod is parallel to the direction of the tunnel.

9. The triangular area support bracket that is easy to withdraw as claimed in claim 1, characterized in that: A rotation resetting device is disposed at one end of the first supporting mechanism and the second supporting mechanism.

10. The triangular area support bracket that is easy to withdraw as claimed in claim 1, characterized in that: A telescopic jack is arranged on one side of the second top beam, a telescopic end of the telescopic jack is connected with a baffle, and an end of the baffle away from the telescopic jack is hinged to one side of the second top beam.

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