Anti-falling lifting frame for tunnel construction

Abstract

The utility model relates to the technical field of tunnel construction, and discloses an anti-falling lifting frame for tunnel construction, which comprises a bottom plate, moving wheels are arranged at the lower end of the bottom plate, two fixing frames are symmetrically and fixedly mounted at the upper end of the bottom plate, and two-way screw rods are mounted in the fixing frames. Movable blocks are symmetrically in threaded connection with positive and negative threads of the two-way lead screw, the movable blocks are rotationally connected with the lower end of a shear fork support, the upper end of the shear fork support is installed in a movable frame and can slide left and right in the movable frame, a bearing platform is fixedly connected to the upper end of the movable frame, and a protective fence is arranged at the upper end of the bearing platform; telescopic rods are fixedly connected to the upper portion of the protective fence, a cross-shaped support is fixedly connected between the telescopic rods, and a hanging ring is slidably connected to the lower end of the cross-shaped support. The problems that transfer is inconvenient and construction efficiency is low when constructors construct or inspect above a tunnel are solved, meanwhile, construction danger is low, and safety of the constructors is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to an anti-fall lifting frame for tunnel construction. Background Art

[0002] A tunnel is a structure built underground, underwater or in a mountain for laying railways or building roads for the passage of motor vehicles. According to its location, it can be divided into three categories: mountain tunnels, underwater tunnels and urban tunnels. Mountain tunnels are those that pass under mountains or hills to shorten the distance and avoid steep slopes. Underwater tunnels are those that pass under rivers or on the seabed to cross rivers or straits. Urban tunnels are those that pass underground in cities to meet the needs of railways passing through large cities.

[0003] During the tunnel construction process, it is often necessary to go up to the top of the tunnel for construction or inspection. The existing technology generally uses ladders to perform inspections. This method is inconvenient to transfer, and it is necessary to change positions and climb multiple times for tunnels in different areas, which greatly reduces the efficiency of tunnel construction. At the same time, the ladder is prone to shaking when the construction workers are working, which poses a great safety hazard to the construction workers. Utility Model Content

[0004] In order to solve the problems of the above-mentioned prior art, the utility model provides an anti-fall lifting frame for tunnel construction, which solves the problems of inconvenience in transfer of construction workers when constructing or inspecting above the tunnel and low construction efficiency, and at the same time solves the low construction risk and ensures the safety of construction workers.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fall-proof lifting frame for tunnel construction, comprising a base plate, a moving wheel is provided at the lower end of the base plate, two fixing frames are symmetrically fixedly installed at the upper end of the base plate, a bidirectional screw rod is installed inside the fixing frame, and a movable block is symmetrically threadedly connected at the positive and negative threads of the bidirectional screw rod, the movable block is rotatably connected to the lower end of a scissors bracket, the upper end of the scissors bracket is installed in the movable frame and can slide left and right in the movable frame, the upper end of the movable frame is fixedly connected to a bearing platform, a guardrail is provided at the upper end of the bearing platform, a telescopic rod is fixedly connected to the upper part of the guardrail, a cross bracket is fixedly connected between the telescopic rods, and a lifting ring is slidably connected to the lower end of the cross bracket.

[0006] With the above structural design, the two movable blocks on it are driven to move closer or farther by rotating the bidirectional screw rod, thereby driving the bearing platform on the upper end of the scissor bracket to rise or fall; movable wheels are provided to facilitate the transfer of the lifting frame; and guardrails are provided to ensure the safety of construction workers.

[0007] Preferably, a positioning assembly is provided on the side wall of the base plate, and the positioning assembly includes a threaded rod vertically passing through the base plate and threadedly connected to the base plate, a rotating rod is provided at the upper end of the threaded rod, and a support foot is fixedly connected to the lower end of the threaded rod.

[0008] With the above structural design, the lifting frame is fixed on the ground through the positioning assembly to prevent the lifting frame from horizontal displacement during operation, which may cause unstable operation.

[0009] Preferably, the telescopic rod includes a sleeve rod fixedly connected to the upper end of the guardrail, and an inner extending rod with a lower end extending into the sleeve rod, and the inner extending rod is provided with a plurality of limiting holes equidistantly arranged along the length direction, and the sleeve rod is provided with fixing holes at positions corresponding to the limiting holes, and the positioning bolts pass through the limiting holes and the fixing holes to relatively fix the sleeve rod and the inner extending rod.

[0010] With the above structural design, the length of the telescopic rod can be adjusted according to the height of the construction workers, so that the height of the lifting ring connected to the cross bracket is adapted to the height of the construction workers, thereby increasing the applicability and practicality of the device.

[0011] Preferably, a slide groove is provided at the lower end of the cross bracket, a slider is slidably connected in the slide groove, and the slider is rotatably connected to the lifting ring through a rotating shaft.

[0012] With the above structural design, the slider can slide in the slide groove arranged at the bottom of the cross bracket, and the worker's protective rope can be hooked on the lifting ring and moved according to construction requirements, thus playing a certain protective measure.

[0013] Preferably, one end of the bidirectional screw rod passes through the fixing frame and is fixedly connected to the output end of the driving motor, and the driving motor is placed on the bottom plate.

[0014] With the above structural design, the rotation of the bidirectional screw is controlled by the driving motor, thereby controlling the height of the bearing platform, thereby reducing the work intensity of the construction workers.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The use of an electric lifting frame with moving wheels instead of a ladder reduces the work intensity of construction workers and improves the work efficiency of tunnel construction.

[0017] 2. When construction workers need to work or transport on the load-bearing platform, their protective rope can be hooked on the lifting ring, the lifting ring can be rotated through the rotating shaft, and the slider above the rotating shaft can move left and right inside the slide slot. In case of high-altitude operations, it can play a certain protective protection measure, and the height of the lifting ring can be adjusted according to the height of the construction workers, which increases the applicability of the lifting frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a side view of the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the fixing frame of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the slideway and the slider of the utility model. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 The utility model provides a technical solution: a fall prevention lifting frame for tunnel construction, comprising a bottom plate 1, a moving wheel 7 is arranged at the lower end of the bottom plate 1, two fixed frames 2 are symmetrically fixedly installed at the upper end of the bottom plate 1, a bidirectional screw rod 13 is installed inside the fixed frame 2, and a movable block 14 is symmetrically threadedly connected at the positive and negative threads of the bidirectional screw rod 13, and the movable block 14 is rotatably connected with the lower end of the scissor bracket 3, and the upper end of the scissor bracket 3 is installed in the movable frame 8 and can slide left and right in the movable frame 8, and the upper end of the movable frame 8 is fixedly connected with a bearing platform 4, and a guardrail 5 is arranged at the upper end of the bearing platform 4, and a telescopic rod 9 is welded on the upper part of the guardrail 5, and a cross bracket 10 is fixedly connected between the telescopic rods 9, and a lifting ring 11 is slidably connected at the lower end of the cross bracket 10. By rotating the bidirectional screw rod 13, the two movable blocks 14 on it are driven to approach or move away, thereby driving the bearing platform 4 at the upper end of the scissor bracket 3 to rise or fall; the moving wheel 7 is arranged to facilitate the transfer of the lifting frame; the guardrail 5 is arranged to ensure the safety of the construction personnel.

[0024] A positioning assembly 6 is provided on the side wall of the bottom plate 1, and the positioning assembly 6 includes a threaded rod 602 that vertically passes through the bottom plate 1 and is threadedly connected to the bottom plate 1, a rotating rod 601 is provided at the upper end of the threaded rod 602, and a support leg 603 is fixedly connected at the lower end of the threaded rod 602. The lifting frame is fixed to the ground by the positioning assembly 6 to prevent the lifting frame from horizontal displacement during operation, resulting in unstable operation.

[0025] The telescopic rod 9 includes a sleeve rod 902 fixedly connected to the upper end of the guardrail 5, an inner extension rod 901 whose lower end extends into the sleeve rod 902, and the inner extension rod 901 is provided with a plurality of limiting holes 903 equidistantly along the length direction, and the sleeve rod 902 is provided with a fixing hole 904 at a position corresponding to the limiting hole 903, and a positioning bolt 905 passes through the limiting hole 903 and the fixing hole 904 to relatively fix the sleeve rod 902 and the inner extension rod 901. The length of the telescopic rod 9 can be adjusted according to the height of the construction personnel, so that the height of the lifting ring 11 connected to the cross bracket 10 is adapted to the height of the construction personnel, thereby increasing the applicability and practicality of the device.

[0026] A slide groove 101 is provided at the lower end of the cross bracket 10, and a slider 111 is slidably connected in the slide groove 101. The slider 111 is rotatably connected to the lifting ring 11 through a rotating shaft. The slider 111 can slide in the slide groove 101 provided at the lower part of the cross bracket 10, and the protective rope of the staff can be hooked on the lifting ring 11 and moved according to the construction requirements, which plays a certain protective protection measure.

[0027] One end of the bidirectional screw rod 13 passes through the fixing frame 2 and is fixedly connected to the output end of the driving motor 12, and the driving motor 12 is placed on the bottom plate 1. The driving motor 12 controls the rotation of the bidirectional screw rod 13, thereby controlling the height of the bearing platform 4, reducing the work intensity of the construction personnel.

[0028] Working principle: The construction personnel first push the lifting frame to the designated position through the moving wheel 7, rotate the rotating rod 601 to fix the lifting frame, and then adjust the length of the telescopic rod 9 as needed, and then stand on the bearing platform 4, connect the lifting ring 11 on the cross bracket 10 with the protective rope on the construction personnel, and after the connection is firm, start the driving motor 12 to drive the two-way screw rod 13 to rotate, and then drive the bearing platform 4 on the scissor bracket 3 to rise. After reaching the designated height, stop the driving motor 12, and the construction personnel can start construction work. The utility model solves the problem of inconvenience in transfer of construction personnel when constructing or inspecting above the tunnel, and the low construction efficiency, and at the same time solves the low construction risk, ensuring the safety of construction personnel.

[0029] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. Although the present utility model is described in detail with reference to the above embodiments, it is still possible for the technical solutions recorded in the above embodiments to be modified, or some of the technical features therein to be replaced by equivalents, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A fall prevention lifting frame for tunnel construction, comprising a bottom plate (1), characterized in that: A moving wheel (7) is arranged at the lower end of the base plate (1), and two fixed frames (2) are symmetrically fixedly installed at the upper end of the base plate (1), and a bidirectional screw rod (13) is installed inside the fixed frame (2), and a movable block (14) is symmetrically threadedly connected at the positive and negative threads of the bidirectional screw rod (13), and the movable block (14) is rotatably connected to the lower end of the scissor bracket (3), and the upper end of the scissor bracket (3) is installed in the movable frame (8) and can slide left and right in the movable frame (8), and the upper end of the movable frame (8) is fixedly connected to a bearing platform (4), and a guardrail (5) is arranged at the upper end of the bearing platform (4), and the upper part of the guardrail (5) is fixedly connected to a telescopic rod (9), and a cross bracket (10) is fixedly connected between the telescopic rods (9), and the lower end of the cross bracket (10) is slidably connected to a lifting ring (11).

2. The anti-fall lifting frame for tunnel construction according to claim 1, characterized in that: A positioning assembly (6) is provided on the side wall of the base plate (1), and the positioning assembly (6) comprises a threaded rod (602) vertically passing through the base plate (1) and threadedly connected to the base plate (1), a rotating rod (601) is provided at the upper end of the threaded rod (602), and a support foot (603) is fixedly connected to the lower end of the threaded rod (602).

3. The anti-fall lifting frame for tunnel construction according to claim 1, characterized in that: The telescopic rod (9) comprises a sleeve rod (902) fixedly connected to the upper end of the guardrail (5), and an inner extension rod (901) whose lower end extends into the sleeve rod (902); the inner extension rod (901) is provided with a plurality of limiting holes (903) equidistantly along the length direction; the sleeve rod (902) is provided with fixing holes (904) at positions corresponding to the limiting holes (903); and a positioning bolt (905) passes through the limiting holes (903) and the fixing holes (904) to relatively fix the sleeve rod (902) and the inner extension rod (901).

4. The anti-fall lifting frame for tunnel construction according to claim 1, characterized in that: A sliding groove (101) is provided at the lower end of the cross bracket (10), a sliding block (111) is slidably connected in the sliding groove (101), and the sliding block (111) is rotatably connected to the hanging ring (11) via a rotating shaft.

5. The anti-fall lifting frame for tunnel construction according to claim 1, characterized in that: One end of the bidirectional screw rod (13) passes through the fixing frame (2) and is fixedly connected to the output end of the driving motor (12); the driving motor (12) is placed on the base plate (1).

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