Welding device for repairing bridge inhaul cable

Abstract

The utility model discloses a welding device for repairing a bridge inhaul cable, which relates to the technical field of bridge maintenance and comprises an inner sheath, outer sheaths are rotatably mounted on the front side and the rear side of the inner sheath respectively, and the two outer sheaths are rotatably connected with the inner sheath through two rotating assemblies respectively. Each of the inner sheath and the two groups of outer sheaths comprises two shells which are symmetrically distributed up and down, two groups of locking assemblies are symmetrically and fixedly mounted on the left and right sides of the shells of the inner sheath and the two groups of outer sheaths, and the arc-shaped groove of the driving wheel is tightly attached to the curved surface of the inhaul cable, so that the contact area and the friction force are effectively increased; therefore, it is ensured that the device has stable driving adhesive force and crawling capacity on an inclined or vertical cable face, self-locking is formed through a locking assembly and a limiting tooth block pressed by a spring through a rack, secondary fastening is assisted by a bolt, double anti-sliding guarantee is provided for an operation position, displacement generated in the welding process is prevented, and the service life of the device is prolonged. And the precision and continuity of repairing operation are ensured.

Description

Technical Field

[0001] This utility model relates to the field of bridge maintenance technology, specifically a welding device for repairing bridge cables. Background Technology

[0002] Welding devices for bridge cable repair are typically carried in a basket or are in the form of a crawling robot. They integrate cleaning, preheating and welding functions and can move along the cable to achieve local repairs.

[0003] Currently, in bridge cable repair operations, the limited contact area between the smooth and curved HDPE sheath surface and the drive wheel, especially under inclined or wet conditions, leads to a significant decrease in adhesion. Furthermore, traditional drive structures lack adaptive clamping and multi-point synchronous drive capabilities, resulting in uneven local pressure. This makes the cable prone to stalling and displacement during welding vibrations or load changes. Consequently, the welding operation is susceptible to slippage or swaying due to vibrations, wind, and its own weight, making it difficult to guarantee the accuracy of the repair position and resulting in uneven welding quality. This leads to low work efficiency and poor continuity, making it difficult to meet the demand for automated cable repair over long distances and in large quantities. Utility Model Content

[0004] The purpose of this invention is to provide a welding device for repairing bridge cables, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A welding device for repairing bridge cables includes an inner sheath, with outer sheaths rotatably mounted on both the front and rear sides of the inner sheath. The two sets of outer sheaths are rotatably connected to the inner sheath via two sets of rotating components. The inner sheath and the two sets of outer sheaths each include two shells symmetrically distributed vertically. A repair component is fixedly installed in the inner cavity of the shell of the inner sheath. The repair component includes a cleaning brush, a heating blower, and a repair welding gun. A detection instrument is provided on the side of each set of outer sheaths away from the inner sheath.

[0007] Each inner cavity of the outer sheath is rotatably equipped with a drive assembly. Each drive assembly includes two drive wheels. The circumferential surface of each drive wheel is provided with an arc-shaped groove that matches the surface of the cable. The shaft of each drive wheel is rotatably connected to the inner wall of the outer sheath.

[0008] Two sets of locking components are symmetrically fixedly installed on the left and right sides of the inner sheath and the two sets of outer sheaths. Each set of locking components includes a rack, and each rack is fixedly installed on the left and right sides of the outer sheath and the inner sheath respectively. A limiting box is sleeved on the outside of the rack, and two symmetrically distributed limiting tooth blocks are slidably installed in the inner cavity of the limiting box. The rack is located between the two limiting tooth blocks and meshes with them.

[0009] As a further embodiment of this utility model, the two limiting teeth blocks on opposite sides are respectively fixedly connected to the inner wall of the limiting box by a thrust spring.

[0010] As a further embodiment of this utility model, the top ends of both sets of limiting teeth are provided with inclined surfaces, and two reset blocks are slidably inserted into the top end of the limiting box. The bottom ends of the reset blocks are all provided with inclined surfaces. The bottom end of each reset block is provided with a limiting box and is connected to the corresponding limiting teeth through inclined surface transmission. A reset spring is sleeved on the outside of each reset block.

[0011] As a further improvement of this utility model, a drive motor is fixedly installed inside the housing of both sets of outer sheaths, and the output end of each set of drive motors is fixedly connected to the corresponding rotating shaft.

[0012] As a further embodiment of this utility model, the rotating assembly includes a rotating ring, which is fixedly installed on the left and right sides of the inner sheath. The outer side of the rotating ring is provided with a rotating sleeve, and the ends of the two outer sheaths near the inner sheath are fixedly connected to the rotating sleeve.

[0013] As a further embodiment of this utility model, a toothed ring is fixedly connected to the outer circumferential surface of the rotating ring, and a gear is rotatably installed on the inner side of the rotating sleeve, with the gear meshing with the toothed ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. When the welding device of this utility model is in use, the arc groove of the drive wheel fits tightly with the curved surface of the cable, effectively increasing the contact area and friction, thereby ensuring that the device has stable driving adhesion and crawling ability on inclined or vertical cable surfaces. Combined with the locking component, the limiting tooth block pressed by the rack and spring forms a self-locking mechanism, and is further tightened by bolts, providing double anti-slip protection for the working position, preventing displacement during the welding process, and ensuring the accuracy and continuity of the repair work.

[0016] 2. When the welding device of this utility model is used, the motor in the rotating component drives the gear to mesh with the gear ring, which drives the inner sheath and the repair component to rotate 360 ​​degrees around the cable axis. This enables full circumferential scanning and operation of the outer surface of the cable protective sheath, effectively eliminating repair blind spots, and allowing the cleaning, preheating and welding processes to continuously and evenly cover the entire circumference, thereby improving repair efficiency and overall quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a welding device for repairing bridge cables.

[0018] Figure 2This is a structural cross-sectional view of a welding device for repairing bridge cables.

[0019] Figure 3 This is a structural exploded view of a locking component in a welding device for repairing bridge cables.

[0020] Figure 4 This is a schematic diagram of the drive component in a welding device for repairing bridge cables.

[0021] Figure 5 This is a structural exploded view of a rotating component in a welding device for repairing bridge cables.

[0022] In the diagram: 1. Inner sheath; 2. Outer sheath; 3. Repair component; 301. Cleaning brush; 302. Heating blower; 303. Repair welding gun; 304. Testing instrument;

[0023] 4. Drive components; 401. Drive wheel; 402. Shaft; 403. Drive motor; 404. Transmission belt;

[0024] 5. Locking assembly; 501. Connecting block; 502. Rack; 503. Limit box; 504. Limiting tooth block; 505. Thrust spring; 506. Reset block; 507. Reset spring; 508. Button plate;

[0025] 6. Rotating assembly; 601. Rotating ring; 602. Rotating sleeve; 603. Gear ring; 604. Gear; 605. Motor. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 In this embodiment of the utility model, a welding device for repairing bridge cables includes an inner sheath 1, with outer sheaths 2 rotatably installed on both the front and rear sides of the inner sheath 1, and the two sets of outer sheaths 2 are rotatably connected to the inner sheath 1 through two sets of rotating components 6 respectively. The inner sheath 1 and the two sets of outer sheaths 2 each include two shells that are symmetrically distributed vertically, and a repair component 3 is fixedly installed in the inner cavity of the shell of the inner sheath 1.

[0028] The repair component 3 includes a cleaning brush 301, a heating blower 302, and a repair welding gun 303. Both outer sheaths 2 are equipped with detectors 304 on the side away from the inner sheath 1.

[0029] Each inner cavity of the outer sheath 2 is rotatably equipped with a drive assembly 4 for driving the entire device to move along the cable. Each drive assembly 4 includes two drive wheels 401. The circumferential surface of each drive wheel 401 is provided with an arc groove that matches the surface of the cable. By increasing the contact area, the adhesion and stability during driving are enhanced. The shaft 402 of each drive wheel 401 is rotatably connected to the inner wall of the outer sheath 2.

[0030] Two sets of locking components 5 are symmetrically fixedly installed on the left and right sides of the inner sheath 1 and the two sets of outer sheath 2 to fix the upper and lower symmetrical shells. Each set of locking components 5 includes a connecting block 501, and each connecting block 501 is fixedly installed on the left and right sides of the outer sheath 2 and the inner sheath 1 respectively. A rack 502 is fixedly connected to the bottom surface of each connecting block 501 to prevent the drive wheel 401 from slipping when it moves.

[0031] It should be noted that there are three sets of cleaning brushes 301. One set of cleaning brushes 301 is fixedly installed in the center of the inner cavity of the upper inner sheath 1, and the other two sets are symmetrically fixedly installed in the inner cavity of the lower inner sheath 1. In actual use, the bridge cable is usually covered with a high-density polyethylene protective sleeve. The heating blower 302 consists of a heating air pump and an air pipe, and the air outlet of the air pipe is close to the outer surface of the protective tube. The controlled hot air softens and preheats the area to be repaired of the protective sleeve, which helps to remove surface moisture, improves the fusion between the subsequent welding material and the protective sleeve, and ensures the sealing, adhesion strength and durability of the repair weld. In conjunction with the repair welding gun 303, the plastic welding wire is melted onto the preheated area, so that the new welding material is fully fused with the original protective tube, thereby realizing the repair of the cable protective sleeve (the heating blower 302 and the repair welding gun 303 are existing technologies, and the specific structure will not be described in detail here).

[0032] Please see Figure 3 A limiting box 503 is sleeved on the outside of the rack 502. Two symmetrically distributed limiting tooth blocks 504 are slidably installed in the inner cavity of the limiting box 503. The rack 502 is located between the two limiting tooth blocks 504 and meshes with them to achieve the initial positioning and fixation of the rack 502. The two limiting tooth blocks 504 are fixedly connected to the inner wall of the limiting box 503 by thrust springs 505 on the opposite sides.

[0033] It should be noted that there are multiple limit boxes 503, which are fixedly installed on the left and right sides of the outer sheath 2 and the inner sheath 1 respectively. Both sides of the rack 502 and the corresponding side of the two sets of limit blocks 504 are serrated to achieve meshing and limit the position of the rack 502. At the same time, the thrust spring 505 provides continuous elastic force to push the limit blocks 504 to always fit against the rack 502, enhancing meshing stability. The self-locking is achieved by the meshing of the rack 502 and the limit blocks 504, which can firmly position the device in the designated working position of the cable and prevent slippage during operation.

[0034] It should also be noted that each rack 502 has an elongated adjustment groove inside. The locking bolt passes through the adjustment groove and the corresponding hole preset on the inner wall of the limiting box 503 in sequence, and is tightened by the nut. Thus, after the rack 502 is initially engaged and positioned by the limiting tooth block 504, its position is further locked, which effectively enhances the vibration resistance and reliability of the overall locking and prevents displacement.

[0035] The top of each of the two sets of limiting tooth blocks 504 is provided with an inclined surface. The top of the limiting box 503 is slidably inserted with two reset blocks 506. The bottom of each reset block 506 is provided with an inclined surface. The bottom of each reset block 506 passes through the limiting box 503 and is connected to the corresponding limiting tooth block 504 through the inclined surface transmission cooperation. Each reset block 506 is externally sleeved with a reset spring 507.

[0036] It should be noted that a pressing plate 508 is fixedly installed on the top surface of each reset block 506, and the upper and lower ends of the reset spring 507 are fixedly connected to the bottom surface of the pressing plate 508 and the top surface of the limit box 503, respectively. A through groove for the rack 502 to pass through is provided at the center of the pressing plate 508.

[0037] Please see Figure 4 Both sets of outer sheaths 2 have drive motors 403 fixedly installed inside their housings, and the output end of each set of drive motors 403 is fixedly connected to the corresponding rotating shaft 402.

[0038] It should be noted that each rotating shaft 402 is fixedly fitted with a pulley on its outer side, and the two rotating shafts 402 on the same side are connected to rotate synchronously through a transmission belt 404. Through the cooperation of the pulley and the transmission belt 404, the two drive wheels 401 on the same side always keep rotating synchronously, avoiding deviation or slippage caused by speed difference, and improving the straightness and stability of the movement.

[0039] Please see Figure 5 The rotating assembly 6 includes a rotating ring 601, which is fixedly installed on the left and right sides of the housing of the inner sheath 1. A rotating sleeve 602 is rotatably sleeved on the outer side of the rotating ring 601, and the two outer sheaths 2 are fixedly connected to the rotating sleeve 602 at the end near the inner sheath 1.

[0040] A toothed ring 603 is fixedly connected to the outer circumferential surface of the rotating ring 601, and a gear 604 is rotatably mounted on the inner side of the rotating sleeve 602, and the gear 604 meshes with the toothed ring 603.

[0041] It should be noted that a motor 605 for providing rotational power is fixedly installed on the inner side of the rotating sleeve 602, and the output shaft of the motor 605 is fixedly connected to the gear 604. The motor 605 drives the gear 604 to drive the rotating ring 601 to rotate, thereby realizing the inner sheath 1 to make a circular motion around the cable, avoiding the occurrence of welding blind spots.

[0042] It should also be noted that a locking block is fixedly installed on the inner side of the rotating sleeve 602 to ensure the smooth rotation of both. A rotating groove is opened on the outer side of the rotating ring 601 to provide rotation space for the locking block, and the locking block is embedded in the rotating groove. At the same time, the outer wall of the locking block has an inner concave surface, and the inner wall of the rotating groove connected to it through the inclined plane transmission has an outer convex surface. Thus, the concave-convex locking structure of the locking block and the rotating groove forms a limiting constraint on the rotating ring 601 during rotation, preventing loosening and providing a stable motion basis for welding operations.

[0043] The working principle of this utility model is as follows:

[0044] When using this utility model, firstly, the device is placed on the section of the cable to be repaired by two sets of outer sheaths 2 and inner sheaths 1 distributed vertically. Then, the push plate 508 is pressed to squeeze the reset spring 507, which drives the reset block 506 to move downward, causing the limiting tooth block 504 to move. Then, the rack 502 is inserted. Under the action of the thrust spring 505, the two sets of limiting tooth blocks 504 tightly bite the serrated surface of the rack 502 from both sides, forming a preliminary self-locking. Subsequently, the locking bolt passing through the adjustment groove of the rack 502 is used for secondary tightening to achieve double locking, ensuring that the drive wheel 401 is tightly fitted with the outer protective sleeve of the cable, and ensuring that the device does not slide relative to the cable during operation.

[0045] Then, the drive motor 403 starts and drives the rotating shaft 402 and drive wheel 401 to rotate through the output shaft. The arc groove of the drive wheel 401 can increase the contact area and adhesion. With the help of the pulley and the transmission belt 404, the two drive wheels 401 on the same side keep rotating synchronously, driving the entire device to crawl smoothly along the cable and avoid deviation.

[0046] Finally, the surface of the outer protective sleeve of the cable is inspected using the detector 304. When the device moves to the repair point and locks in place, the motor 605 drives the gear 604 to rotate. The gear 604 meshes with the gear ring 603, thereby causing the rotating ring 601 and the inner sheath 1 to rotate around the cable axis. This drives the three sets of cleaning brushes 301 to rotate accordingly, brushing the surface of the cable protective sleeve to remove oxide layers, dirt, and impurities. In conjunction with the activation of the heated blower 302, its air outlet is aimed at the cleaned area, blowing out controllable hot air to locally soften and dry the surface of the protective sleeve. At the same time, the rotation of the inner sheath 1 controls the repair welding gun 303 to perform all-round operation on the circumference of the outer protective sleeve of the cable. The repair welding gun 303 is used to melt the plastic welding wire onto the preheated area, finally completing the defect repair.

[0047] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A welding device for repairing bridge cables, comprising an inner sheath (1), characterized in that, The inner sheath (1) is rotatably mounted with outer sheaths (2) on both the front and rear sides, and the two sets of outer sheaths (2) are rotatably connected to the inner sheath (1) through two sets of rotating components (6). The inner sheath (1) and the two sets of outer sheaths (2) each include two shells that are symmetrically distributed vertically. The inner cavity of the shell of the inner sheath (1) is fixedly mounted with a repair component (3). The repair component (3) includes a cleaning brush (301), a heating blower (302), and a repair welding gun (303). The two sets of outer sheaths (2) are provided with a detector (304) on the side away from the inner sheath (1). Each inner cavity of the outer sheath (2) is rotatably equipped with a drive assembly (4). Each drive assembly (4) includes two drive wheels (401). The circumferential surface of each drive wheel (401) is provided with an arc groove that matches the surface of the cable. The shaft (402) of each drive wheel (401) is rotatably connected to the inner wall of the outer sheath (2). Two sets of locking components (5) are symmetrically fixedly installed on the left and right sides of the inner sheath (1) and the two sets of outer sheaths (2). Each set of locking components (5) includes a rack (502), and each rack (502) is fixedly installed on the left and right sides of the outer sheath (2) and the inner sheath (1). A limiting box (503) is sleeved on the outside of the rack (502). Two symmetrically distributed limiting teeth (504) are slidably installed in the inner cavity of the limiting box (503), and the rack (502) is located between the two limiting teeth (504) and meshes with them.

2. The welding device for bridge cable repair according to claim 1, characterized in that, The two limiting teeth (504) are respectively fixedly connected to the inner wall of the limiting box (503) by a thrust spring (505) on the opposite side.

3. The welding device for bridge cable repair according to claim 2, characterized in that, The top of each of the two sets of limiting teeth (504) is provided with an inclined surface. The top of the limiting box (503) is slidably inserted with two reset blocks (506). The bottom of each reset block (506) is provided with an inclined surface. The bottom of each reset block (506) passes through the limiting box (503) and is connected to the corresponding limiting teeth (504) through the inclined surface transmission. Each reset block (506) is provided with a reset spring (507) on its outside.

4. The welding device for bridge cable repair according to claim 1, characterized in that, Both sets of outer sheaths (2) have drive motors (403) fixedly installed inside their housings, and the output end of each set of drive motors (403) is fixedly connected to the corresponding rotating shaft (402).

5. The welding device for bridge cable repair according to claim 1, characterized in that, The rotating assembly (6) includes a rotating ring (601), which is fixedly installed on the left and right sides of the inner sheath (1). The outer side of the rotating ring (601) is provided with a rotating sleeve (602), and the two outer sheaths (2) are fixedly connected to the rotating sleeve (602) at the end near the inner sheath (1).

6. The welding device for bridge cable repair according to claim 5, characterized in that, A toothed ring (603) is fixedly connected to the outer circumference of the rotating ring (601), and a gear (604) is rotatably installed on the inner side of the rotating sleeve (602), and the gear (604) meshes with the toothed ring (603).

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