Trapezoidal six-column type anti-scour roadway hydraulic support

Abstract

The invention relates to the technical field of roadway scour prevention, in particular to a trapezoidal six-column type scour-prevention roadway hydraulic support which comprises guide supporting columns, a support bottom beam and a support top beam, and an isosceles trapezoid supporting frame is formed by the guide supporting columns, the support bottom beam and the support top beam. The guide supporting column comprises a guide base, a guide rod is fixedly arranged on the guide base, a guide sleeve is arranged on the outer side of the upper portion of the guide rod, a convex lug is arranged on the side face of the non-end portion of the guide sleeve, a hydraulic stand column is arranged on the side face of the guide rod, and the hydraulic stand column is connected with the guide base and the convex lug in a column nest mode. A pressing rod is arranged in the upper guide cylinder above the energy absorption component; the support has the advantages that the support can adapt to the isosceles trapezoid section of a roadway, the adaptability of the support bottom beam and the support top beam to the angles of a roadway bottom plate and a top plate can be improved, in the supporting process, the hydraulic stand columns only bear axial loads, lateral loads and top beam or bottom beam torsional loads are mainly borne by the guide rods, the guide sleeves and the guide supporting pin shafts, and the supporting effect is good. And support instability or hydraulic stand column damage caused by lateral or torsional loads is effectively prevented.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel anti-collision, in particular to a trapezoidal six-column anti-collision tunnel hydraulic support. Background Art

[0002] Rock burst is a sudden and highly destructive mining disaster that poses a major threat to the safety of miners, tunnel stability and the integrity of mining equipment. Tunnel anti-rock burst hydraulic support is a key support equipment for the safety of mine operations, maintaining tunnel stability and protecting personnel and equipment from damage caused by rock burst. However, due to the randomness and uncertainty of rock burst, it is difficult to determine the type, location, direction, etc. of rock burst, which will result in the possibility of large lateral loads and torsional loads on the top or bottom beams of the tunnel anti-rock burst support equipment when rock burst occurs, which puts strict requirements on the tunnel anti-rock burst support.

[0003] For the existing anti-collision hydraulic supports, hydraulic columns are mostly used to directly support the top and bottom beams of the tunnel. When the hydraulic columns are subjected to large bending forces, they are prone to damage such as expansion and explosion of the hydraulic columns, which further causes the anti-collision hydraulic supports to lose their safety support performance. Therefore, this will lead to defects such as poor torsion resistance, weak lateral load resistance and large bending moment of the hydraulic columns in the anti-collision hydraulic supports, making it difficult to adapt to the complex and changeable load forms and sizes in the tunnels. Summary of the invention

[0004] The present invention provides a trapezoidal six-column anti-collision tunnel hydraulic support, which can overcome certain or some defects of the prior art.

[0005] According to the present invention, a trapezoidal six-column anti-collision tunnel hydraulic support comprises: a support bottom beam and a support top beam, wherein both ends of the support bottom beam are connected to a guide support column through the guide pin shaft; a support top beam is arranged on the top of the guide support column above the support bottom beam, and the guide support column, the support bottom beam and the support top beam form an isosceles trapezoidal support frame;

[0006] The guide support column includes a hydraulic column and a guide base, the guide base is connected to the bottom beam of the bracket through a guide pin shaft, a guide rod is fixedly provided on the guide base, a guide sleeve is provided on the upper outer side of the guide rod, a lug is provided on the non-end side of the guide sleeve, a hydraulic column is provided on the side of the guide rod, the cylinder of the hydraulic column is connected to the guide base through a column socket, the piston rod of the hydraulic column is connected to the lug through the column socket, and the top of the guide sleeve is hinged to the top beam of the bracket.

[0007] Preferably, the bottom beam of the bracket includes a short bottom beam and a long bottom beam connected by a bottom beam connecting pin, and at the non-bottom beam connecting pin connecting ends of the short bottom beam and the long bottom beam, each is connected to a guide support column through the guide pin; a guide support column is connected to the bottom beam connecting pin connecting end on the long bottom beam at a certain distance, and is connected to the guide pin; the top beam of the bracket includes a long top beam and a short top beam, and one end of the long top beam and the short top beam are connected to the top end of the corresponding guide support column through a guide pin, and the other end is connected through a top beam connecting pin, and is connected to the top end of the guide support column at a certain distance from the top beam connecting pin connecting end on the long top beam.

[0008] Preferably, a partition is provided in the guide sleeve, which divides the guide sleeve into an upper guide cylinder and a lower guide cylinder. An energy absorbing component is provided in the upper guide cylinder, and a pressure rod is provided in the upper guide cylinder above the energy absorbing component. The pressure rod is hinged to the bracket top beam through a guide pin shaft.

[0009] Preferably, a convex arc surface is provided at the hinged joint between the top end of the pressure rod and the top beam of the support, and a concave arc surface is provided at the hinged joint between the top beam of the support and the pressure rod.

[0010] Preferably, a concave arc surface is provided at the hinge between the bottom end of the guide base and the bottom beam of the bracket, and a convex arc surface is provided at the hinge between the bottom beam of the bracket and the guide base.

[0011] Preferably, there is a clearance fit between the inwardly concave arcuate surface and the outwardly convex arcuate surface.

[0012] Preferably, swing limit blocks are provided on the left and right sides of the guide base, and fixed limit blocks are provided on the inner upper surface of the bottom beam of the bracket connected to the guide support column.

[0013] Preferably, hydraulic columns are symmetrically provided on both the front and rear sides of the guide rod.

[0014] Preferably, the guide sleeve is a welding assembly, and both left and right sides of the guide sleeve are provided with reinforcement structures for preventing weld cracking.

[0015] Preferably, the pressure rod and the upper guide cylinder are separable from each other.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] ① The guide support column, the bracket bottom beam and the bracket top beam constitute an isosceles trapezoidal support frame to adapt to the isosceles trapezoidal section of the tunnel. The bracket bottom beam and the bracket top beam adopt a two-section design, which is not only easy to carry, but also can increase the adaptability of the bracket bottom beam and the bracket top beam to the angle of the bottom plate and the top plate of the tunnel.

[0018] ② The extension and retraction of the guide support column can be driven by controlling the hydraulic column to further realize the lifting and lowering action of the hydraulic support. Moreover, during the support process, the hydraulic column only bears axial loads, and the lateral loads and the torsional loads of the top beam or bottom beam are mainly borne by the guide rod, guide sleeve and guide support column pin, thereby effectively preventing the instability of the support or damage to the hydraulic column due to lateral or torsional loads.

[0019] ③ An energy-absorbing component is provided above the hydraulic column, which can protect the hydraulic support through the energy-absorbing and yielding effect of the energy-absorbing component.

[0020] ④ When the guide pin shaft is damaged or destroyed, the convex arc surface at the end of the pressure rod contacts the concave arc surface inside the top beam of the bracket, or the concave arc surface at the end of the guide base contacts the convex arc surface of the bottom beam of the bracket, ensuring the connectivity between the guide support column and the top beam of the bracket and maintaining the stability of the bracket.

[0021] ⑤ A swing limit block and a fixed limit block are provided; it is easy to install. At the same time, it plays a limiting role when the top beam of the bracket deflects to the left or right. When the deflection energy is too large, the swing limit block will undergo plastic deformation and absorb energy, thereby protecting the overall structure of the bracket.

[0022] ⑥ A reinforcement structure is provided on both the left and right sides of the guide sleeve to prevent the weld from cracking, so as to avoid damage to the guide sleeve due to excessive force exerted by the guide rod on the guide sleeve when the lateral load and the torsional load of the top beam or the bottom beam are applied.

[0023] ⑦ The pressure rod and the upper guide cylinder can be separated from each other, and the energy absorbing component can be replaced or maintained online. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of an embodiment of the present invention;

[0025] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0026] Figure 3 for Figure 1 A magnified schematic diagram of the structure of the middle B section;

[0027] Figure 4 for Figure 1 Schematic diagram of the three-dimensional structure.

[0028] in:

[0029] 1. Short bottom beam; 2. Long bottom beam; 3. Bottom beam connecting pin; 4. Guide support column; 411. Swing limit block 411; 412. Fixed limit block; 41. Guide base; 42. Guide sleeve; 421. Upper guide cylinder; 422. Lower guide cylinder; 423. Partition; 43. Guide sleeve; 43. Hydraulic column; 44. Energy absorbing member; 45. Pressure rod; 46. Guide rod; 47. Lug; 5. Short top beam; 6. Long top beam; 7. Top beam connecting pin; 8. Guide pin. DETAILED DESCRIPTION

[0030] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0031] Example 1

[0032] like Figures 1 to 4 As shown, a trapezoidal six-column anti-collision tunnel hydraulic support, a support bottom beam and a support top beam, both ends of the support bottom beam are connected to a guide support column 4 through the guide pin shaft 8; a support top beam is provided on the top of the guide support column 4 above the support bottom beam, and the guide support column 4, the support bottom beam, and the support top beam form an isosceles trapezoidal support frame to adapt to the isosceles trapezoidal section of the tunnel. The support bottom beam and the support top beam adopt a two-stage design, which is not only easy to carry, but also can increase the adaptability of the support bottom beam and the support top beam to the angle of the tunnel bottom plate and the top plate;

[0033] The guide support column 4 includes a hydraulic column 43 and a guide base 41. The guide base 41 is connected to the bottom beam of the bracket through a guide pin 8. A guide rod 46 is fixedly provided on the guide base 41. A guide sleeve 42 is provided on the upper outer side of the guide rod 46. A lug 47 is provided on the non-end side of the guide sleeve 42. A hydraulic column 43 is provided on the side of the guide rod 46. The cylinder of the hydraulic column 43 is connected to the guide base 41 through a column socket. The piston rod of the hydraulic column 43 is connected to the lug 47 through the column socket. In fact, the connection through the column socket is also provided with a connecting pin, but the column socket is subjected to force during normal support, and the pin connection The connection is a large gap connection, and the pin shaft is not subjected to the supporting load. It only plays the role of pushing and pulling the guide sleeve 42 during the lifting and lowering process of the hydraulic column 43. The upper part of the guide sleeve 42 is hinged to the top beam of the bracket. With this arrangement, the extension and retraction of the guide support column 4 can be driven by controlling the hydraulic column 43, thereby further realizing the lifting and lowering action of the hydraulic bracket. Moreover, during the support process, the hydraulic column 43 only bears the axial load, and the lateral load and the torsional load of the top beam or the bottom beam are mainly borne by the guide rod 46, the guide sleeve 42 and the guide support column pin shaft 8, thereby effectively preventing the bracket from being unstable or the hydraulic column from being damaged due to lateral or torsional loads.

[0034] Furthermore, the bottom beam of the bracket includes a short bottom beam 1 and a long bottom beam 2 connected by a bottom beam connecting pin 3, and at the non-bottom beam connecting pin 3 connecting ends of the short bottom beam 1 and the long bottom beam 2, each is connected with a guide support column 4 through a guide pin 8; at a certain distance from the bottom beam connecting pin 3 connecting end on the long bottom beam 2, a guide support column 4 is connected through a guide pin 8; the top beam of the bracket includes a long top beam 6 and a short top beam 5, one end of the long top beam 6 and the short top beam 5 are connected to the top end of the corresponding guide support column 4 through the guide pin 8, and the other end is connected through a top beam connecting pin 7, and is connected to the top end of the guide support column 4 at a certain distance from the top beam connecting pin 7 connecting end on the long top beam 6.

[0035] Furthermore, a partition plate 423 is provided in the guide sleeve 42, which divides the guide sleeve 42 into an upper guide cylinder 421 and a lower guide cylinder 422. An energy absorbing member 44 is provided in the upper guide cylinder 421, and a pressure rod 45 is provided in the upper guide cylinder 421 above the energy absorbing member 44. The pressure rod 45 is hinged to the support top beam through the guide pin shaft 8. With such an arrangement, the hydraulic support can be protected by the absorption and displacement effect of the energy absorbing member 44.

[0036] Furthermore, an outward convex arc surface is arranged at the hinge point between the top end of the pressure rod 45 and the top beam of the bracket, and an inward concave arc surface is arranged at the hinge point between the top beam of the bracket and the pressure rod 45; with such arrangement, under normal working conditions, the guide pin shaft 8 bears the load, and since the trapezoidal structure has no stability, once the guide pin shaft 8 is damaged, the bracket will become unstable and lose its supporting function. Therefore, when the guide pin shaft 8 is damaged or destroyed, the outward convex arc surface at the end of the pressure rod 45 contacts the inward concave arc surface inside the top beam of the bracket, thereby ensuring the connectivity between the guide support column 4 and the top beam of the bracket and maintaining the stability of the bracket.

[0037] Furthermore, a concave arc surface is provided at the hinge between the bottom end of the guide base 41 and the bottom beam of the bracket, and a convex arc surface is provided at the hinge between the bottom beam of the bracket and the guide base 41; under normal working conditions, the guide pin 8 bears the load, and since the trapezoidal structure has no stability, once the guide pin 8 is damaged, the bracket will become unstable and lose its supporting function. Therefore, when the guide pin 8 is damaged or destroyed, the concave arc surface at the end of the guide base 41 and the convex arc surface of the bottom beam of the bracket contact each other, ensuring the connectivity between the guide support column 4 and the bottom beam of the bracket and maintaining the stability of the bracket.

[0038] Furthermore, there is a clearance fit between the inner concave arc surface and the outer convex arc surface.

[0039] Furthermore, swing limit blocks 411 are provided on the left and right sides of the guide base 41, and fixed limit blocks 412 are provided on the inner upper surface of the guide support column 4 connected to the bottom beam of the bracket; such a configuration is convenient for installation, and at the same time, it plays a limiting role when the top beam of the bracket deflects to the left or right. When the deflection energy is too large, the swing limit block 411 will undergo plastic deformation and absorb energy, thereby protecting the overall structure of the bracket. In this embodiment, the middle guide support column 4 is connected to the long bottom beam 2, and the fixed limit blocks 412 are set on the front and rear side surfaces for interacting with the guide base 41, but in other embodiments, it can also be set on the upper surface of the long bottom beam 2 like the fixed limit blocks 412 on both sides. Of course, the fixed limit blocks 412 on both sides or one side can also be set on the front and rear side surfaces of the short bottom beam 1 or the long bottom beam 2 like the fixed limit blocks 412 in the middle.

[0040] Furthermore, hydraulic columns 43 are symmetrically provided on both the front and rear sides of the guide rod 46 .

[0041] Furthermore, the guide sleeve 42 is a welded assembly, and both left and right sides of the guide sleeve 42 are provided with reinforcement structures to prevent weld cracking, so as to avoid the guide rod 46 exerting excessive force on the guide sleeve 42 when lateral loads and torsional loads on the top beam or bottom beam occur, thereby causing damage to the guide sleeve 42.

[0042] Furthermore, the pressure rod 45 and the upper guide cylinder 421 can be separated from each other. When the energy absorbing component 44 needs to be replaced or maintained, the other two guide support columns 4 are kept stationary, and the hydraulic column 43 in the guide support column 4 where the energy absorbing component 44 needs to be replaced or maintained is controlled to retract, so that the pressure rod 45 is separated from the upper guide cylinder 421, and the energy absorbing component 44 can be taken out from the upper guide cylinder 421, thereby constituting online replacement or maintenance of the energy absorbing component 44.

[0043] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A trapezoidal six-column anti-collision tunnel hydraulic support, comprising: The support bottom beam and the support top beam are characterized in that: the two ends of the support bottom beam are each connected to a guide support column (4) through the guide pin shaft (8); the top of the guide support column (4) above the support bottom beam is provided with a support top beam, and the guide support column (4) and the support bottom beam and the support top beam form an isosceles trapezoidal support frame; The guide support column (4) comprises a hydraulic column (43) and a guide base (41), wherein the guide base (41) is connected to the bottom beam of the support through a guide pin shaft (8), a guide rod (46) is fixedly provided on the guide base (41), a guide sleeve (42) is provided on the upper outer side of the guide rod (46), a lug (47) is provided on the non-end side of the guide sleeve (42), a hydraulic column (43) is provided on the side of the guide rod (46), a cylinder of the hydraulic column (43) is connected to the guide base (41) through a column socket, a piston rod of the hydraulic column (43) is connected to the lug (47) through the column socket, and the upper part of the guide sleeve (42) is hinged to the top beam of the support.

2. The trapezoidal six-column anti-collision tunnel hydraulic support according to claim 1, characterized in that: The bottom beam of the bracket comprises a short bottom beam (1) and a long bottom beam (2) connected by a bottom beam connecting pin shaft (3); at the non-bottom beam connecting pin shaft (3) connection ends of the short bottom beam (1) and the long bottom beam (2), a guide support column (4) is connected via the guide pin shaft (8); at a certain distance from the bottom beam connecting pin shaft (3) connection end on the long bottom beam (2), a guide support column (4) is connected via the guide pin shaft (8); the top beam of the bracket comprises a long top beam (6) and a short top beam (5); one end of the long top beam (6) and the short top beam (5) are connected to the top end of the corresponding guide support column (4) via the guide pin shaft (8), and the other end is connected via the top beam connecting pin shaft (7), and is connected to the top end of the guide support column (4) at a certain distance from the top beam connecting pin shaft (7) connection end on the long top beam (6).

3. The trapezoidal six-column anti-collision tunnel hydraulic support according to claim 1, characterized in that: A partition (423) is provided in the guide sleeve (42), and the partition (423) divides the guide sleeve (42) into an upper guide cylinder (421) and a lower guide cylinder (422). An energy absorbing component (44) is provided in the upper guide cylinder (421), and a pressure rod (45) is provided in the upper guide cylinder (421) above the energy absorbing component (44). The pressure rod (45) is hinged to the bracket top beam through a guide pin shaft (8) at the top.

4. The trapezoidal six-column anti-collision tunnel hydraulic support according to claim 3 is characterized in that: An outward convex arcuate surface is provided at the hinged position between the top end of the pressure rod (45) and the support top beam, and an inward concave arcuate surface is provided at the hinged position between the support top beam and the pressure rod (45).

5. The trapezoidal six-column anti-collision tunnel hydraulic support according to claim 1, characterized in that: The hinged joint between the bottom end of the guide base (41) and the bottom beam of the support is provided with an inwardly concave arc surface, and the hinged joint between the bottom beam of the support and the guide base (41) is provided with an outwardly convex arc surface.

6. A trapezoidal six-column anti-collision tunnel hydraulic support according to claim 4 or 5, characterized in that: There is a clearance fit between the inner concave arc surface and the outer convex arc surface.

7. The trapezoidal six-column anti-collision tunnel hydraulic support according to claim 1, characterized in that: Swing limit blocks (411) are provided on the left and right sides of the guide base (41), and fixed limit blocks (412) are provided on the inner upper surface of the support bottom beam connected to the guide support column (4).

8. The trapezoidal six-column anti-collision tunnel hydraulic support according to claim 1, characterized in that: Hydraulic columns (43) are symmetrically arranged on both the front and rear sides of the guide rod (46).

9. The trapezoidal six-column anti-collision tunnel hydraulic support according to claim 1, characterized in that: The guide sleeve (42) is a welding assembly, and both left and right side surfaces of the guide sleeve (42) are provided with a reinforcement structure for preventing the weld from cracking.

10. The trapezoidal six-column anti-collision tunnel hydraulic support according to claim 3, characterized in that: The pressing rod (45) and the upper guide cylinder (421) can be separated from each other.

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