Crawling ladder for power transmission tower

Abstract

The utility model relates to the technical field of power transmission towers, in particular to a power transmission tower ladder stand. The ladder stand comprises two ladder stand columns perpendicular to the ground, a plurality of transversely-arranged ladder stand cross rods are evenly connected between the two ladder stand columns, and a plurality of auxiliary hooks facing the same direction as top hooks are evenly arranged on one sides of the ladder stand cross rods. A detachable anti-falling structure is arranged on the side of one of the ladder stand columns; according to the device, the chain transmission assembly is used, the falling protector can be driven to ascend through the chain, meanwhile, the ratchet wheel and the pawl are used for enabling the chain to only rotate in one direction, and after use, the falling protector can be descended through the rotating handle only by pressing down the operating handle; according to the device, the top hook and the multiple sets of auxiliary hooks are used, the device can be used only by being hoisted and hung on the power transmission tower and can also be used for a long time after being welded, and the welding requirement is low; the anti-falling device in the device can be taken along by an operator, so that the construction cost can be reduced, and meanwhile, the possibility of being stolen is eradicated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a power transmission tower technical field, concretely relates to a power transmission tower ladder. BACKGROUND

[0002] The power transmission tower is an important facility in power energy transmission, can reliably, safely support the power transmission line, due to the line safety and personnel safety demand, the power transmission tower has certain height requirement, and the staff needs to regularly patrol and detect and maintain the line, in order to facilitate the staff to climb, the power transmission tower needs to set up the ladder, and part of the power transmission tower will use simple climbing structure, for example, the evenly arranged climbing pole, the staff needs to hold the protruding part, and cooperate with the horizontal pole of the power transmission tower and climb, without professional protection device, need professional personnel to operate, and the danger coefficient is high, another part of the power transmission tower uses the fixed ladder, is used steel frame and is hung to the tower body, and is sequentially welded and fixed from bottom to top, and then the outside is welded with the anti-falling guardrail, and the climbing difficulty is relatively small, but the climbing area is small, and the climbing process is relatively laborious, and there are more welding places, and the construction process is long. SUMMARY

[0003] The utility model discloses to the defects and insufficiency of prior art, provide a kind of power transmission tower ladder of reasonable design, it can solve the above-mentioned defects.

[0004] To achieve the above object, the utility model adopts the following technical scheme: it contains two vertical to the ground ladder upright, several transversely arranged ladder horizontal poles are evenly connected between the two ladder uprights, the side of the ladder horizontal pole is evenly provided with several auxiliary hooks in the same direction as the top hook, and the side of the one ladder upright is provided with detachable anti-falling structure.

[0005] Preferably, the detachable anti-falling structure includes an upper equipment box and a lower equipment box respectively arranged at the top and bottom of the side of the ladder upright, a chain transmission assembly is arranged between the upper equipment box and the lower equipment box, a drive device and a controllable locking assembly connected with the chain transmission assembly are arranged in the lower equipment box, and a movable anti-falling mounting assembly is connected to the chain transmission assembly.

[0006] Preferably, the chain transmission assembly includes a lower chain wheel rotatably installed in the lower equipment box and an upper chain wheel installed in the upper equipment box, a chain is movably connected to the upper chain wheel and the lower chain wheel, chain movable grooves are formed in the upper side of the lower equipment box and the lower side of the upper equipment box, and the chain is arranged through the chain movable grooves.

[0007] Preferably, the controllable locking assembly comprises a ratchet wheel coaxially installed with the lower chain wheel, a pawl provided on one side of the ratchet wheel and matched with the ratchet wheel, a movable shaft provided at the tail end of the pawl, the pawl being rotatably installed in the lower equipment box through the movable shaft, a supporting block installed above the head of the pawl in the lower equipment box, and a spring connected between the supporting block and the head of the pawl; the rear side of the pawl is connected with a connecting rod, the rear end of the connecting rod is connected with an operation handle, and a handle movable slot is formed in the lower equipment box, and the connecting rod passes through the handle movable slot.

[0008] Preferably, the movable anti-falling installation assembly comprises an installation ring connected to the chain through a plurality of steel wires, the installation positions of the plurality of steel wires and the chain are located on the side away from the auxiliary hooks, and the installation ring is detachably installed with an anti-falling device.

[0009] Preferably, the driving device comprises a rotating handle rotatably installed on the lower equipment box, and the installation end of the rotating handle penetrates through the lower equipment box and is connected with the lower chain wheel.

[0010] Preferably, a plurality of drainage grooves are formed in the bottom of the lower equipment box.

[0011] Preferably, an anti-skid sleeve is arranged on the rotating handle.

[0012] After the above structure is adopted, the device has the following beneficial effects:

[0013] 1. The device uses a chain transmission assembly, the anti-falling device can be lifted through the chain, the chain can only rotate in one direction through the ratchet wheel and the pawl, and thus the anti-falling device can be prevented from sliding or even falling without a special locking device, and after use, the pawl can be driven to move away from the ratchet wheel by pressing the operation handle, the contact is limited, and thus the anti-falling device is lowered, and the operation is simple and convenient.

[0014] 2. The device uses a top hook and a plurality of auxiliary hooks, and during installation, the device can be temporarily used by being hoisted and hung on a power transmission tower, or the device can be permanently used after being welded, the plurality of hooks can bear weight, the device only needs to prevent the ladder from sliding left and right, and the welding requirement is low.

[0015] 3. The anti-falling device in the device can be directly disassembled and taken away after use, and can be carried by the operator, and thus each ladder fixing device is not needed, the construction cost is reduced, and the possibility of being stolen during long-term idle is eliminated. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the overall structure schematic view of the device after the anti-falling device is disassembled;

[0017] Figure 2 is Figure 1 is an enlarged view of part B in the device;

[0018] Figure 3 is the internal structure diagram of the lower equipment box in the utility model;

[0019] Figure 4 is Figure 1 the enlarged view of A part in the utility model;

[0020] Figure 5 is the internal structure diagram of the upper equipment box in the utility model;

[0021] Figure 6 is the installation mode schematic view of the anti-falling device in the utility model.

[0022] Mark explanation:

[0023] 1, ladder upright; 2, ladder crossbar; 3, top hook; 4, auxiliary hook; 5, lower equipment box; 6, upper equipment box; 7, chain; 8, steel wire rope; 9, mounting ring; 10, chain movable slot; 11, lower chain wheel; 12, upper chain wheel; 13, drainage groove; 14, ratchet; 15, pawl; 16, movable shaft; 17, connecting rod; 18, operating handle; 19, handle movable slot; 20, supporting block; 21, spring; 22, handlebar; 23, anti-skid sleeve; 24, anti-falling device. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Referring to Figure 1 , it comprises two ladder uprights 1 perpendicular to the ground, a plurality of ladder crossbars 2 are evenly connected between the two ladder uprights 1, and a plurality of auxiliary hooks 4 are evenly arranged on one side of the ladder crossbar 2 and are oriented in the same direction as the top hook 3; the side of one of the ladder uprights 1 is provided with a detachable anti-falling structure.

[0026] Referring to Figures 1-4 , the detachable anti-falling structure comprises an upper equipment box 6 and a lower equipment box 5 arranged at the top and the bottom of the side of the ladder upright 1 respectively, a chain transmission assembly is arranged between the upper equipment box 6 and the lower equipment box 5, a driving device and a controllable locking assembly are arranged in the lower equipment box 5 and are connected with the chain transmission assembly; and a movable anti-falling installation assembly is connected to the chain transmission assembly.

[0027] Referring to Figures 1-5As shown, the chain transmission assembly comprises a lower chain wheel 11 rotatably installed in the lower equipment box 5 and an upper chain wheel 12 installed in the upper equipment box 6, the upper chain wheel 12 and the lower chain wheel 11 are drivingly connected with a chain 7, the upper side of the lower equipment box 5 and the lower side of the upper equipment box 6 are provided with chain movable slots 10, and the chain 7 passes through the chain movable slots 10.

[0028] Referring to Figures 1-3 As shown, the controllable locking assembly comprises a ratchet wheel 14 coaxially installed with the lower chain wheel 11, the ratchet wheel 14 is provided with a ratchet pawl 15 matched therewith on one side, the tail end of the ratchet pawl 15 is provided with a movable shaft 16, the ratchet pawl 15 is rotatably installed in the lower equipment box 5 through the movable shaft 16, a supporting block 20 is installed above the head of the ratchet pawl 15 in the lower equipment box 5, and a spring 21 is connected between the supporting block 20 and the head of the ratchet pawl 15; the rear side of the ratchet pawl 15 is connected with a connecting rod 17, the rear end of the connecting rod 17 is connected with an operating handle 18, and the lower equipment box 5 is provided with a handle movable slot 19, and the connecting rod 17 passes through the handle movable slot 19; a plurality of drainage grooves 13 are formed in the bottom of the lower equipment box 5.

[0029] Referring to Figures 1-6 As shown, the movable anti-falling mounting assembly comprises a mounting ring 9 connected to the chain 7 through a plurality of steel wire ropes 8, the mounting positions of the plurality of steel wire ropes 8 and the chain 7 are located on the side away from the auxiliary hook 4, and the mounting ring 9 is detachably mounted with an anti-falling device 24.

[0030] Referring to Figures 1-3 Figures 1-3 As shown, the driving device comprises a rotating handle 22 rotatably installed on the lower equipment box 5, the installation end of the rotating handle 22 penetrates the lower equipment box 5 and is connected with the lower chain wheel 11; and the rotating handle 22 is provided with an anti-skid sleeve 23.

[0031] The principle of the utility model uses the process:

[0032] First, install the ladder to the power transmission tower: hoist the ladder, move to the power transmission tower, make the height of the ladder flat with the installation position, then lift the ladder upward, make the top hook 3 slightly higher than the cross beam to be installed on the top of the power transmission tower, and the auxiliary hook 4 is higher than the corresponding cross beam on the power transmission tower, then push the ladder into the power transmission tower, make the top hook 3 and the auxiliary hook 4 enter the power transmission tower, the inner side of the ladder upright column 1 and the ladder cross beam 2 contact with the surface of the power transmission tower, then lower the ladder, the ladder uses the top hook 3 and the auxiliary hook 4 to hang on the power transmission tower from multiple heights at the same time, then the installation personnel can directly use or weld and reinforce at any number of contact points on the inner side of the ladder and the power transmission tower to complete the installation.

[0033] In use, the user hangs the fall arrester 24 on the mounting ring 9, then pulls out the fall rope of the fall arrester 24 and holds it, and then rotates the handle 22, so as to drive the lower chain wheel 11 and the ratchet wheel 14 to rotate by the rotation of the handle 22, the lower chain wheel 11 drives the chain 7 and the upper chain wheel 12 to rotate synchronously, and in the rotating process, the pawl 15 is pushed downward by the spring 21, but the ratchet wheel 14 can rotate in the forward direction and cannot be reversed because the ratchet teeth of the ratchet wheel 14 are one-way teeth, the rotating chain 7 drives the fall arrester 24 to gradually rise through the steel wire rope 8 and the mounting ring 9, and the fall rope of the fall arrester 24 is also gradually lengthened, when the fall arrester 24 gradually approaches the top end, the steel wire rope 8 and the mounting ring 9 also gradually approach the upper equipment box 6, and the chain movable slot 10 only allows the chain 7 to pass through, and the mounting ring 9 is clamped, so that the lower handle 22 cannot continue to rotate, which indicates that the mounting ring 9 has reached the top, and the rotation of the handle 22 can be stopped, and the pawl 15 is automatically clamped into the ratchet teeth of the ratchet wheel 14 under the driving of the spring 21, so as to prevent the ratchet wheel 14 from being reversed, and to fix the chain 7 and the mounting ring 9, thereby fixing the fall arrester 24, and the user can connect the safety belt to the joint of the fall rope, and perform climbing operation, when the user accidentally falls, the fall arrester 24 is triggered, and the user is immediately hung by the fall arrester 24, thereby preventing falling;

[0034] After the operation is completed, the user only needs to press the operation handle 18, drives the pawl 15 to rotate along the movable shaft 16 through the connecting rod 17, and at the same time, the spring 21 is compressed, after the claw part of the pawl 15 is away from the ratchet wheel 14, the ratchet wheel 14 can be freely rotated, and then the handle 22 is reversely rotated, so as to drive the chain 7 to drive the mounting ring 9 and the fall arrester 24 to descend, and the fall arrester 24 is released after descending to the bottom, and then the operation handle 18 is released, the fall arrester 24 is removed and taken to the next ladder to be climbed to repeat the above operation, so that only one fall arrester 24 can be repeatedly used for multiple ladders, the use cost is low, and the risk of being stolen is reduced, and the upper equipment box 6 and the lower equipment box 5 can protect the internal components during the long idle time, reduce the dust entering, and the drain groove 13 can conveniently and quickly drain rainwater.

[0035] It should be understood that the above specific embodiments of the utility model are only used for example or explanation of the principle of the utility model, and do not constitute the limitation of the utility model. Therefore, any modification, equivalent replacement, improvement, etc. made without deviating from the spirit and scope of the utility model shall be included in the protection scope of the utility model. In addition, the appended claims of the utility model are intended to cover all changes and modifications falling into the scope and boundary of the appended claims, or the equivalent forms of such scope and boundary.

Claims

1. A transmission tower ladder, comprising two ladder columns (1) perpendicular to the ground, and a plurality of horizontally arranged ladder crossbars (2) evenly connected between the two ladder columns (1), characterized in that: The ladder crossbar (2) is provided with several auxiliary hooks (4) that face the same direction as the top hook (3) on one side; and a detachable anti-fall structure is provided on the side of the ladder column (1).

2. A transmission tower ladder according to claim 1, characterized in that: The detachable fall arrestor structure includes an upper equipment box (6) and a lower equipment box (5) respectively located on the top and bottom of the side of the ladder column (1). A chain drive assembly is provided between the upper equipment box (6) and the lower equipment box (5). The lower equipment box (5) is provided with a drive device connected to the chain drive assembly and a controllable locking assembly. A movable fall arrestor mounting assembly is connected to the chain drive assembly.

3. A transmission tower ladder according to claim 2, characterized in that: The chain drive assembly includes a lower chain wheel (11) rotatably mounted in the lower equipment box (5) and an upper chain wheel (12) mounted in the upper equipment box (6). A chain (7) is drivenly connected to the upper chain wheel (12) and the lower chain wheel (11). The upper side of the lower equipment box (5) and the lower side of the upper equipment box (6) are both provided with chain movement grooves (10). The chain (7) passes through several chain movement grooves (10).

4. A transmission tower ladder according to claim 3, characterized in that: The controllable locking assembly includes a ratchet (14) coaxially mounted with the lower chain wheel (11). A pawl (15) is provided on one side of the ratchet (14) to cooperate with it. A movable shaft (16) is provided at the tail end of the pawl (15). The pawl (15) is rotatably mounted in the lower equipment box (5) through the movable shaft (16). A support block (20) is installed in the lower equipment box (5) above the head of the pawl (15). A spring (21) is connected between the support block (20) and the head of the pawl (15). A connecting rod (17) is connected to the rear side of the pawl (15). An operating handle (18) is connected to the rear end of the connecting rod (17). A handle movable groove (19) is opened on the lower equipment box (5). The connecting rod (17) is set through the handle movable groove (19).

5. A transmission tower ladder according to claim 4, characterized in that: The movable fall arrestor assembly includes an installation ring (9) connected to a chain (7) by several steel wire ropes (8). The installation positions of the steel wire ropes (8) and the chain (7) are located on the side away from the chain (7) and away from the auxiliary hook (4). A fall arrestor (24) is detachably installed on the installation ring (9).

6. A transmission tower ladder according to claim 5, characterized in that: The drive device includes a throttle (22) rotatably mounted on the lower equipment box (5), and the mounting end of the throttle (22) passes through the lower equipment box (5) and is connected to the lower sprocket (11).

7. A transmission tower ladder according to claim 6, characterized in that: The bottom of the lower device box (5) has several drainage grooves (13).

8. A transmission tower ladder according to claim 7, characterized in that: The throttle (22) is provided with an anti-slip sleeve (23).

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