Auxiliary mounting device for tunnel sectional type steel arch

Abstract

The utility model relates to the technical field of tunnel construction equipment, in particular to an auxiliary mounting device for a tunnel sectional type steel arch. The device comprises a lifting device used for lifting a steel arch, and the lifting device is arranged on a lifter; the lifting device comprises a supporting plate fixedly connected to the upper end of the lifter, a lifting rod fixedly connected to the supporting plate and a clamping assembly used for preventing the steel arch from slipping, and the clamping assembly is arranged on the lifting rod. A jacking rod is hinged to the supporting plate, and a power assembly used for driving the jacking rod to rotate is arranged on the supporting plate. According to the device, the steel arch can be lifted to a mounting position, auxiliary lifting of a crane is not needed, and the construction cost is saved; the device can be suitable for steel arches of different specifications.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction equipment, in particular to an auxiliary installation device for a tunnel segmented steel arch frame. Background Art

[0002] Anchor spraying + arch support is the main initial support method for tunnels in poor geological sections, biased shallow buried, and weathered rock sections. After installation, the arch can quickly bear loads, ensure the stability of the tunnel excavation section, achieve rapid completion of initial support, give full play to the role of initial support, and ensure the safety of subsequent construction operations.

[0003] Tunnel arch frames are usually processed in sections outside the tunnel, transported into the tunnel by a transport vehicle, and loaded onto the excavation platform by a loader. Six to eight initial support workers perform simple positioning by carrying it on their shoulders and using pipes to push it up. However, during the installation process, many construction workers are completely exposed to the surrounding rock without any protection. When rocks fall, they are likely to cause injuries to the workers, posing a high safety risk for the construction work.

[0004] Chinese patent CN202320430109.3 discloses "A tunnel initial support arch auxiliary installation system", publication number CN219865050U, the device includes a trolley gantry system, a trolley travel system that drives the trolley gantry system to travel, a first side wall hydraulic cylinder is movably installed on the side bracket on the left side of the trolley gantry system, and a second side wall hydraulic cylinder is movably installed on the side bracket on the right side, and the piston rod ends of the first side wall hydraulic cylinder and the second side wall hydraulic cylinder are detachably installed with a side wall arch support positioning cross bar, and the top bracket of the trolley gantry system is movably installed with a first top hydraulic cylinder on the left side, and a second top hydraulic cylinder on the right side, and the piston rod ends of the first top hydraulic cylinder and the second top hydraulic cylinder are detachably installed with a top arch support positioning cross bar. However, the device has some defects: when installing a steel arch, the device cannot lift and raise the steel arch, and an additional crane is required to lift the steel arch to the positioning cross bar. Utility Model Content

[0005] In order to solve the above problems of the prior art, the utility model provides an auxiliary installation device for a tunnel segmented steel arch frame, which can lift the steel arch frame to an installation position without the need for crane auxiliary lifting.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an auxiliary installation device for a tunnel segmented steel arch frame, comprising a lifting device for lifting the steel arch frame, wherein the lifting device is arranged on a lift; the lifting device comprises a support plate fixedly connected to the upper end of the lift, a lifting rod fixedly connected to the support plate, and a clamping assembly for preventing the steel arch frame from slipping, wherein the clamping assembly is arranged on the lifting rod; a jacking rod is hinged on the support plate, and a power assembly for driving the jacking rod to rotate is arranged on the support plate.

[0007] With the above structural design, the staff puts the steel arch frame on the lifting rod and fixes the steel arch frame with the clamping assembly. Then the staff starts the elevator, and the elevator moves the steel arch frame upward, and the steel arch frame can be lifted to the installation position.

[0008] Preferably, the clamping assembly includes a clamping rod symmetrically hinged on the lifting rod, a scissor rod hinged to the clamping rod, a ring hinged to the scissor rod, and a positioning pin passed through the ring. The ring is sleeved on the lifting rod, and a positioning hole matching the positioning pin is provided on the lifting rod.

[0009] By adopting the above structural design, the steel arch frame is clamped by the extension and retraction of the scissor rods, and the clamping of steel arch frames of different specifications is achieved by adjusting the extension and retraction length of the scissor rods and controlling the opening size of the clamping rods.

[0010] Preferably, the clamping rod is an arc-shaped rod, and the end of the clamping rod is fixedly connected to the blocking rod.

[0011] The above structural design is adopted to increase the opening of the clamping rod.

[0012] Preferably, the power assembly includes a rope fixedly connected to the supporting rod, a rotating shaft fixedly connected to the rope, and a servo motor transmission-connected to the rotating shaft, the rotating shaft is rotatably connected to the shaft seat, the shaft seat is fixedly connected to the support plate, and the servo motor is fixedly connected to the support plate.

[0013] With the above structural design, the rope is wound up by rotating the rotating shaft, and the jacking rod is rotated by the rope winding.

[0014] Preferably, the support plate and the lifting rod are both fixedly connected to a fixed pulley, and the rope passes around the fixed pulley.

[0015] The above structural design is adopted to reduce the friction between the rope and the support plate; and stabilize the winding direction of the rope so that the winding direction of the rope is on the same axis.

[0016] Preferably, the end of the supporting rod is fixedly connected to a concave-shaped fixing plate, and a roller is rotatably connected to the inner side wall of the fixing plate.

[0017] With the above structural design, when the jacking rod supports the steel arch frames on both sides, the steel arch frames on both sides are supported by the rotation of the jacking rod, so that the steel arch frames on both sides and the steel arch frame at the top form a complete arch frame, and the roller can reduce the friction between the jacking rod and the steel arch frame when rotating.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1) This device can lift the steel arch frame to the installation position without the need for crane auxiliary lifting.

[0020] 2) This device can be applied to steel arches of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a schematic diagram of the structure of the utility model from the front;

[0023] Figure 3 For this utility model Figure 1 The enlarged structural diagram at A in the middle; DETAILED DESCRIPTION

[0024] See also Figure 1 , Figure 2 , Figure 3 The utility model provides a technical solution: an auxiliary installation device for a tunnel segmented steel arch frame, comprising a lifting device for lifting the steel arch frame, wherein the lifting device is arranged on a lift 1; the lifting device comprises a support plate 21 fixedly connected to the upper end of the lift 1, a lifting rod 22 fixedly connected to the support plate 21, and a clamping assembly for preventing the steel arch frame from slipping, wherein the clamping assembly is arranged on the lifting rod 22; a jacking rod 3 is hinged on the support plate 21, and a power assembly for driving the jacking rod 3 to rotate is arranged on the support plate 21.

[0025] In this embodiment, the lift 1 adopts a scissor-type lift work platform, and a railing is fixedly connected to the support plate 21 to prevent the staff from falling from the lift 1, so as to protect the safety of the staff.

[0026] The clamping assembly includes a clamping rod 41 symmetrically hinged on the lifting rod 22, a scissor rod 42 hinged to the clamping rod 41, a ring 43 hinged to the scissor rod 42, and a positioning pin 44 passed through the ring 43. The ring 43 is sleeved on the lifting rod 22, and a positioning hole matching the positioning pin 44 is provided on the lifting rod 22, and a plurality of positioning holes are provided.

[0027] The clamping rod 41 is an arc-shaped rod, and the end of the clamping rod 41 is fixedly connected to the blocking rod.

[0028] The power assembly includes a rope 51 fixedly connected to the jacking rod 3, a rotating shaft 52 fixedly connected to the rope 51, and a servo motor 53 transmission-connected to the rotating shaft 52. The rotating shaft 52 is rotatably connected to a shaft seat 54, the shaft seat 54 is fixedly connected to the support plate 21, and the servo motor 53 is fixedly connected to the support plate 51.

[0029] An anti-slip ring 57 is tightly sleeved on the rotating shaft 52 to prevent the rope 51 from slipping off the rotating shaft 52 .

[0030] The support plate 21 and the lifting rod 22 are both fixedly connected to the fixed pulley 6 , and the rope 51 passes around the fixed pulley 6 .

[0031] The end of the supporting rod 3 is fixedly connected to a concave-shaped fixing plate 71 , and a roller 72 is rotatably connected to the inner side wall of the fixing plate 71 .

[0032] In order to ensure the supporting strength of the steel arch frame and reduce its weight, the steel arch frame adopts an I-beam structure; the steel arch frame is too long and inconvenient to transport, so the main body of the steel arch frame is generally divided into three sections.

[0033] When the device is in use, the staff first assembles the steel arch frame simply, hinges the middle steel arch frame with the steel arch frames at both ends, or connects the middle steel arch frame with the steel arch frames at both ends with bolts but does not tighten the bolts. Then the staff pulls down the collar 43 to drive the scissor rod 42 to move downward, and the opening of the clamping rod 41 becomes larger due to the extension of the scissor rod 42. Next, the staff places the middle steel arch frame on the top of the lifting rod 22, and then moves the collar 43 upward to reduce the opening of the clamping rod 41, thereby clamping the middle steel arch frame. Then the staff uses the positioning pin 44 to pass through the collar 43 and the lifting rod 22 to fix the collar 43. Next, the staff stands on the support plate 21 and starts the lift. 1. The elevator 1 is raised with the middle steel arch frame, and the steel arch frames on both sides are also raised together until the steel arch frames on both sides are on the same axial plane with the middle steel arch frame, and the steel arch frames on both sides are in conflict with the fixing plate 71. The position of the elevator 1 is fine-tuned to align the middle steel arch frame with the installation position. The elevator 1 continues to work until the middle steel arch frame fits the tunnel wall. Then the staff starts the servo motor 53, and the shaft 52 rotates to reel in the rope 51. The reeling of the rope 51 rotates the top support rod 3. The rotation of the top support rod 3 acts on the steel arch frames on both sides, so that the steel arch frames on both sides gradually fit the tunnel wall. Then the staff tightens the bolts between the middle steel arch frame and the steel arch frames on both sides, welds the middle steel arch frame to the steel arch frames on both sides, and proceeds to the next step of construction.

[0034] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0035] The present invention is described above with reference to the preferred embodiments, but the protection scope of the present invention is not limited thereto, and all technical solutions falling within the scope of the claims are within the protection scope of the present invention. Various improvements may be made to the present invention and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. An auxiliary installation device for a tunnel segmented steel arch frame, comprising a lifting device for lifting the steel arch frame, characterized in that: The lifting device is arranged on the lift (1); the lifting device comprises a support plate (21) fixedly connected to the upper end of the lift (1), a lifting rod (22) fixedly connected to the support plate (21), and a clamping assembly for preventing the steel arch frame from slipping, wherein the clamping assembly is arranged on the lifting rod (22); a supporting rod (3) is hinged on the support plate (21), and a power assembly for driving the supporting rod (3) to rotate is arranged on the support plate (21).

2. The auxiliary installation device for a tunnel segmented steel arch according to claim 1, characterized in that: The clamping assembly comprises a clamping rod (41) symmetrically hinged on the lifting rod (22), a scissor rod (42) hinged to the clamping rod (41), a ring (43) hinged to the scissor rod (42), and a positioning pin (44) inserted into the ring (43); the ring (43) is sleeved on the lifting rod (22); and a positioning hole matching the positioning pin (44) is provided on the lifting rod (22).

3. The auxiliary installation device for a tunnel segmented steel arch according to claim 2, characterized in that: The clamping rod (41) is an arc-shaped rod, and the end of the clamping rod (41) is fixedly connected to the blocking rod.

4. The auxiliary installation device for a tunnel segmented steel arch according to claim 1, characterized in that: The power assembly comprises a rope (51) fixedly connected to the jacking rod (3), a rotating shaft (52) fixedly connected to the rope (51), and a servo motor (53) drivingly connected to the rotating shaft (52); the rotating shaft (52) is rotatably connected to a shaft seat (54); the shaft seat (54) is fixedly connected to a support plate (21); and the servo motor (53) is fixedly connected to the support plate (21).

5. The auxiliary installation device for a tunnel segmented steel arch according to claim 4, characterized in that: The support plate (21) and the lifting rod (22) are both fixedly connected to a fixed pulley (6), and the rope (51) passes around the fixed pulley (6).

6. The auxiliary installation device for a tunnel segmented steel arch according to claim 1, characterized in that: The end of the supporting rod (3) is fixedly connected to a concave-shaped fixing plate (71), and a roller (72) is rotatably connected to the inner side wall of the fixing plate (71).

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