Clamp for hoisting steel pipe welding

Abstract

The clamp comprises a clamping mechanism and a driving mechanism, the clamping mechanism comprises two clamping arms capable of being opened and closed and further comprises a clamping block and a supporting block, the supporting block is used for being matched with the side portion of the steel pipe in an abutting-against mode, the clamping block is arranged at the position between the two clamping arms, and the driving mechanism is arranged between the two clamping arms. The clamping block is linked to move outwards along the center line of the two clamping arms when the two clamping arms move towards the closing direction, and is linked to move inwards along the center line of the two clamping arms when the two clamping arms move towards the opening direction; the driving mechanism is used for driving the clamping arms to conduct opening and closing movement and driving the clamping arms to move in the linear direction, and abutting mechanisms matched with the side portions of the two steel pipe sections in an abutting mode are arranged at the two ends of the supporting block respectively. The clamp for welding the hoisting steel pipe is simple in structure and convenient to disassemble and assemble.

Description

Technical Field

[0001] This utility model relates to a clamp for hoisting and welding steel pipes. Background Technology

[0002] Steel pipe towers are widely used in power transmission lines, communication equipment, and other fields. During their installation, it is often necessary to hoist and weld multiple steel pipe sections one by one. To ensure welding quality, the welded parts of adjacent steel pipe ends must be aligned and kept stable during hoisting.

[0003] Currently, welding two sections of steel pipe requires manual maintenance to keep them aligned or to use clamps for positioning. Since the steel pipes are prone to swaying during hoisting, manual maintenance significantly impacts welding quality. Conventional clamps typically employ a two-sided clamping method, using two relatively movable clamping blocks to simultaneously hold both sides of the pipe section to prevent swaying. Two sets of clamping blocks hold each pipe section separately, keeping them aligned. This conventional clamping structure has relatively many components, is complex, and heavy, making it unsuitable for welding operations at heights. Furthermore, since it generally uses screws to drive the translation of the two clamping blocks, disassembly and assembly are also cumbersome. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a clamp for lifting and welding steel pipes, which has a simple structure and is easy to assemble and disassemble.

[0005] This utility model discloses a clamp for lifting and welding steel pipes, comprising a clamping mechanism and a driving mechanism. The clamping mechanism includes two openable and closable clamping arms, a clamping block linked to the opening and closing action of the two clamping arms, and support blocks respectively disposed at the front ends of the two clamping arms and on the clamping block. The support blocks are used for pressing against the side of the steel pipe. The clamping block is positioned between the two clamping arms. When the two clamping arms move in the closing direction, the clamping block is linked to move outward along the center line of the two clamping arms. When the two clamping arms move in the opening direction, the clamping block is linked to move outward along the center line of the two clamping arms. The centerline moves inward, and the driving mechanism is used to drive the clamping arm to open and close and to move the clamping arm along a linear direction. Through the linkage between the clamping arm and the clamping block, the three support blocks located on the clamping arm and the clamping block can move towards each other or away from each other. The support blocks form a three-way limiting fit around the steel pipe section to prevent lateral displacement during welding. The two ends of the support block are provided with abutment mechanisms that abut against the sides of the two steel pipe sections respectively, so that the three support blocks can simultaneously limit the two steel pipe sections, which facilitates the subsequent welding operation.

[0006] This utility model has the following advantages over existing steel pipe hoisting and welding clamps: Two clamping arms and clamping blocks can simultaneously clamp two steel pipes via the clamping blocks on them. It has fewer parts, a simpler structure, and is lighter, making it more suitable for carrying at heights. The swinging motion of the clamping arms improves the assembly and disassembly efficiency compared to the translational motion of existing clamps, making it more suitable for continuous welding operations. Due to the linkage between the clamping arms and clamping blocks, the synchronous movement of the three components is achieved through a single drive mechanism, making operation convenient. It can limit the movement of the steel pipe section in three directions, improving the lateral restriction effect. In actual welding, welding can be performed through the gap between the side of the steel pipe section and the clamping arms or clamping blocks, or through the openings at the ends of the two clamping arms. When welding circumferentially along the steel pipe section, the circumferential direction can be continuously adjusted through clamping and loosening operations, making operation convenient.

[0007] Furthermore, the device also includes a base, with the rear ends of the two clamping arms pivotally connected to both sides of the base. The two clamping arms are symmetrically provided with sliding grooves. The two sides of the clamping block respectively form a guide sliding fit with the sliding grooves of the two clamping arms. When the clamping block is driven to move along the center line, the two clamping arms can also be linked to produce an opening and closing action. The driving mechanism includes an adjusting screw threaded through the base. The front end of the adjusting screw is rotatably connected to the clamping block, and the rear end of the adjusting screw is connected to an operating handle. When the adjusting screw is rotated relative to the base, it will move along the axial direction, thereby driving the clamping block to move along the center line. The operating handle is a pin that is movably threaded through the rear end of the adjusting screw, making operation relatively effortless.

[0008] Furthermore, at least one abutment mechanism is provided at one end of all support blocks, including a bolt threaded through one end of the support block (i.e., the abutment mechanism that abuts with the same steel pipe section adopts the same structure). The front end of the bolt abuts with the side of the steel pipe section, and the rear end of the bolt is used to operate its rotation relative to the support block. Specifically, the rotation is operated through the hexagonal hole at the rear end of the bolt and with the help of a hexagonal wrench. Of course, it can also be operated by a movable pin like an adjusting screw.

[0009] Furthermore, at least one of the abutment mechanisms at each end of all support blocks includes a rolling element (i.e., the abutment mechanism that abuts against the same steel pipe segment adopts the same structure). The rolling element includes a rotating bracket pivotally connected to the support block and a rubber ring sleeved on the outer periphery of the rotating bracket. The rolling element allows the clamp to rotate relative to the steel pipe segment it clamps while limiting the lateral movement of the steel pipe segment. This facilitates the adjustment of the circumferential relative position of the two steel pipe segments. In addition, during welding, the unwelded parts between the steel pipe segments can be exposed by rotating the clamp, which facilitates the welding operation.

[0010] Furthermore, the rotating bracket is provided with a plurality of protrusions evenly spaced on its outer periphery and recesses formed between two adjacent protrusions, which provides better contact and rolling effect for steel pipe sections with uneven surfaces (for example, some steel pipe sections may have weld beads or welded steel bars on their surfaces).

[0011] Furthermore, at least one abutment mechanism is provided at one end of all support blocks, including a rubber pad provided on the support block, that is, the abutment mechanism that abuts against the same steel pipe section adopts the same structure. Attached Figure Description

[0012] Figure 1 This is a usage state diagram of an embodiment of the present utility model;

[0013] Figure 2 This is a top view of an embodiment of the present utility model;

[0014] Figure 3 This is a side view of the support block of the clamping block in an embodiment of the present utility model;

[0015] Figure 4 This is a diagram showing the usage state of the rolling element in an embodiment of this utility model;

[0016] Figure 5 This is a diagram showing the usage state of the rolling element in other embodiments of this utility model. Detailed Implementation

[0017] The structure of the clamp for lifting and welding steel pipes in this embodiment of the utility model is as follows: Figure 1-4 As shown, the device includes a clamping mechanism and a driving mechanism. The clamping mechanism includes two openable clamping arms 1, a clamping block 2 that is linked to the opening and closing action of the two clamping arms 1, and support blocks 3 respectively disposed at the front ends of the two clamping arms 1 and on the clamping blocks 2. The support blocks 3 are used to press against the side of the steel pipe a. The clamping block 2 is positioned between the two clamping arms 1. Based on the linkage between the clamping block 2 and the two clamping arms 1, the clamping block 2 is linked to move outward along the center line of the two clamping arms 1 when the two clamping arms 1 move in the closing direction, and the clamping block 2 is linked to move outward along the center line of the two clamping arms 1 when the two clamping arms 1 move in the opening direction. The centerline of the clamping arm 1 moves inward. The driving mechanism is used to drive the clamping arm 1 to open and close and to move along a linear direction. Through the linkage between the clamping arm 1 and the clamping block 2, the three support blocks 3 located on the clamping arm 1 and the clamping block 2 can move towards each other or away from each other. The support blocks 3 form a three-way limiting fit around the steel pipe section a to prevent lateral displacement during welding. The two ends of the support blocks 3 are provided with abutting mechanisms that abut against the sides of the two steel pipe sections a respectively, so that the three support blocks 3 can simultaneously limit the two steel pipe sections a, which facilitates the subsequent welding operation.

[0018] This utility model has the following advantages over existing steel pipe a hoisting and welding fixtures: The two clamping arms 1 and clamping blocks 2 can simultaneously clamp two steel pipes a through the clamping blocks 2. It has fewer parts, a simpler structure, and is lighter, making it more suitable for carrying at heights. The swinging motion of the clamping arms 1 improves the assembly and disassembly efficiency compared to the translational motion of existing fixtures, making it more suitable for continuous welding operations. Due to the linkage between the clamping arms 1 and clamping blocks 2, the synchronous movement of the three components is achieved through a single drive mechanism, making operation convenient. It can limit the movement of the steel pipe segment a in three directions, improving the lateral restriction effect. In actual welding, welding can be performed through the gap between the side of the steel pipe segment a and the clamping arms 1 or clamping blocks 2, or through the openings at the ends of the two clamping arms 1. When welding circumferentially along the steel pipe segment a, the circumferential direction can be continuously adjusted through clamping and loosening operations, making operation convenient.

[0019] In this embodiment, the device further includes a base 4, with the rear ends of the two clamping arms 1 pivotally connected to both sides of the base 4. Slide grooves 11 are symmetrically arranged on the two clamping arms 1. The two sides of the clamping block 2 respectively form a guide sliding fit with the slide grooves 11 of the two clamping arms 1. When the clamping block 2 is driven to move along the center line, the two clamping arms 1 can also be linked to produce an opening and closing action. The driving mechanism includes an adjusting screw 51 screwed through the base 4. The front end of the adjusting screw 51 is rotatably connected to the clamping block 2, and the rear end of the adjusting screw 51 is connected to an operating handle 52. When the adjusting screw 51 is rotated relative to the base 4, it will move along the axial direction, thereby driving the clamping block 2 to move along the center line. The operating handle 52 is a pin movably inserted through the rear end of the adjusting screw 51, making operation relatively effortless.

[0020] In this embodiment, the two ends of the support block 3 adopt different abutment mechanisms, while the abutment mechanisms that cooperate with the same steel pipe segment a adopt the same structure, such as... Figure 1-3 As shown, the abutment mechanism provided at one end of each support block 3 includes a bolt 61 threaded through one end of the support block 3. The front end of the bolt 61 abuts against the side of the steel pipe section a, and the rear end of the bolt 61 is used to operate its rotation relative to the support block 3. Specifically, the rotation is operated by using the hexagonal hole at the rear end of the bolt 61 and a hexagonal wrench. Of course, it can also be operated by using a movable pin like the adjusting screw 51. The abutment mechanism constructed with bolt 61 is used to connect with the hoisted steel pipe section.

[0021] The abutment mechanism located at the opposite end of all support blocks 3 includes a rolling element 62, such as... Figure 4As shown, the rolling element 62 includes a rotating bracket 621 pivotally connected to the support block 3 and a rubber ring 622 sleeved on the outer periphery of the rotating bracket 621. The rotating bracket 621 is connected to the support block 3 via a shaft 620. The abutment mechanism constructed with the rolling element 62 is used to connect with the non-lifted steel pipe segment a. The setting of the rolling element 62 allows it to limit the lateral movement of the steel pipe segment a while also allowing the clamp to rotate relative to the lifted steel pipe segment a that it clamps and cooperates with. This facilitates the adjustment of the circumferential relative position of the two steel pipe segments a. Specifically, the clamp can be rotated by gripping the operating handle 52. When the clamp rotates, it will also drive the steel pipe segment a connected with it by bolts 61 to rotate, which facilitates the rotation operation of the lifted steel pipe segment a. In addition, during welding, the unwelded parts between the steel pipe segments a can be exposed by rotating the clamp, which facilitates the welding operation.

[0022] In such Figure 5 In other embodiments shown, the rotating bracket 621 has a plurality of protrusions 6211 evenly distributed around its outer circumference and recesses 6212 spaced between adjacent protrusions 6211. This provides better contact and rolling performance for uneven steel pipe sections a, such as those with weld beads or welded steel bars. The recesses 6212 can be used as clearance space. Alternatively, in other embodiments, thicker rubber rings 622 can be used to achieve the same effect.

[0023] In other embodiments, the abutment mechanism at one end of each support block 3 may include a rubber pad disposed on the support block 3. Using, for example, a rubber pad or rubber ring to abut against the steel pipe section a helps to reduce wear on the outer peripheral wall of the steel pipe section a. Furthermore, due to its certain elastic deformation capability, it can compensate for insufficient fitting accuracy when clamping the steel pipe section a.

[0024] The above embodiments are merely one preferred embodiment of the present utility model. Ordinary changes and substitutions made by those skilled in the art within the scope of the present utility model's technical solution are all included within the protection scope of the present utility model.

Claims

1. A clamp for lifting and welding steel pipes, characterized in that: The device includes a clamping mechanism and a driving mechanism. The clamping mechanism includes two openable clamping arms, a clamping block that is linked to the opening and closing action of the two clamping arms, and support blocks respectively disposed at the front ends of the two clamping arms and on the clamping block. The support blocks are used to press against the side of the steel pipe. The clamping block is positioned between the two clamping arms. When the two clamping arms move in the closing direction, the clamping block is linked to move outward along the center line of the two clamping arms. When the two clamping arms move in the opening direction, the clamping block is linked to move inward along the center line of the two clamping arms. The driving mechanism is used to drive the clamping arms to perform opening and closing actions and to drive the clamping arms to move in a linear direction. The two ends of the support block are provided with abutment mechanisms that respectively abut against the side of the two steel pipe segments.

2. The clamp for lifting and welding steel pipes according to claim 1, characterized in that: The device includes a base, with the rear ends of two clamping arms pivotally connected to both sides of the base. The two clamping arms are symmetrically provided with sliding grooves. The two sides of the clamping block are respectively guided and slidably engaged with the sliding grooves of the two clamping arms. The driving mechanism includes an adjusting screw threaded through the base. The front end of the adjusting screw is rotatably connected to the clamping block, and the rear end of the adjusting screw is connected to an operating handle.

3. The clamp for lifting and welding steel pipes according to claim 1, characterized in that: The abutment mechanism, which is provided at least at one end of all support blocks, includes a bolt threaded through one end of the support block. The front end of the bolt abuts against the side of the steel pipe section, and the rear end of the bolt is used to operate its rotation relative to the support block.

4. The clamp for lifting and welding steel pipes according to claim 1, characterized in that: The abutment mechanism, which is provided at least at one end of all support blocks, includes a rolling element. The rolling element includes a rotating bracket pivotally connected to the support block and a rubber ring sleeved on the outer periphery of the rotating bracket.

5. The clamp for lifting and welding steel pipes according to claim 4, characterized in that: The rotating bracket has multiple protrusions evenly spaced around its outer periphery and recesses formed between two adjacent protrusions. The rubber ring is fitted onto the ends of the multiple protrusions, and a cavity is formed between the rubber ring and the recesses.

6. The clamp for lifting and welding steel pipes according to claim 1, characterized in that: At least one abutment mechanism is provided at one end of all support blocks, including a rubber pad provided on the support block.

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