A clamping tool for pipe welding in hydraulic engineering

What is AI technical title?
AI technical title is built by Patsnap AI team. It summarizes the technical point description of the patent document.
By designing limiting and lifting components, the problem of uneven welding between bent and straight pipes is solved, ensuring that the welded pipes are straight, thus improving welding quality and efficiency.

CN224574979UActive Publication Date: 2026-07-31ZHEJIANG SHUNHE CONSTR CO LTD

View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: ZHEJIANG SHUNHE CONSTR CO LTD
Filing Date: 2025-08-13
Publication Date: 2026-07-31

AI Technical Summary

Technical Problem

In existing technologies, it is difficult to accurately align bent and straight pipes when welding, resulting in a non-straight shape after welding, which affects the welding quality.

Method used

By employing limiting and lifting components, and through the cooperation of straight pipe limiting plates and curved pipe limiting plates, the curved pipe and straight pipe are ensured to be on the same straight line. The height and orientation are adjusted by clamping and lifting components to achieve accurate positioning.

Benefits of technology

This technology enables straight pipes to be welded together, resulting in a straight connection and improving the accuracy and efficiency of the welding process.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN224574979U_ABST

Patent Text Reader

Abstract

This utility model discloses a clamping tool for welding bent pipes in water conservancy engineering, comprising: a bearing component for supporting and stabilizing; a clamping component installed on the upper end of the bearing component for clamping the bent pipe so that it is placed in an "L" shape vertically; a limiting component installed on the upper end of the bearing component and located below the clamping component, including a straight pipe limiting plate and a bent pipe limiting plate arranged on the same straight line, the straight pipe limiting plate being used to place the straight pipe horizontally, and the bent pipe limiting plate being used to place the bent pipe, the upper end of the straight pipe limiting plate having a first limiting groove, and the upper end of the bent pipe limiting plate having a second limiting groove; and a lifting component, the limiting component being mounted on the bearing component via the lifting component for adjusting the height of the limiting component. By limiting the straight pipe and the bent pipe respectively by the straight pipe limiting plate and the bent pipe located on the same straight line, the end of the bent pipe to be welded can be aligned with the straight pipe on the same straight line.

Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the field of pipe bending welding technology, specifically to a clamping tool for pipe bending welding in water conservancy projects. Background Technology

[0002] Currently, in the construction of water conservancy projects, it is necessary to lay drainage pipes. During the construction process, it is often necessary to bend the pipes due to the terrain and avoid obstacles. When bending, it is often necessary to weld the bend joints to the straight pipes.

[0003] In the prior art, the "Welding Clamping Device for a Bending Pipe Joint in Hydraulic Construction" (publication number "CN 212946268 U") places the bending pipe between two fixed arc-shaped blocks, with the side to be welded facing the arc-shaped plate. By incorporating a handwheel, a fixed frame, a two-way screw rod, a sliding block, and a fixed arc-shaped plate, the bending pipe can be quickly fixed. A limit rod ensures the stability of the fixed arc-shaped plate's movement. A support column, connecting block, and arc-shaped plate allow for adjustment of the arc-shaped plate's position. A straight pipe is placed on the arc-shaped plate, which is then magnetically attached and fixed. The bending pipe joint is then welded to the straight pipe. An electric motor drives the bending pipe joint and the straight pipe to rotate, ensuring thorough welding and improving welding efficiency.

[0004] However, in the aforementioned patent, the straight pipe is placed on the curved plate to make it horizontal and at a fixed height, while the elbow is clamped and fixed by two curved plates. This method does not limit the height and orientation of the elbow. When clamping, it is necessary to observe and adjust the height and orientation of the elbow to determine whether the welded end of the elbow is on a straight line with the straight pipe. However, when the offset is small, it is not possible to judge by sight. Therefore, after welding, it is easy to cause the welded end of the straight pipe and the elbow to be not straight. Utility Model Content

[0005] To address the shortcomings of the existing technology, this utility model proposes a clamping tool for welding bent pipes in water conservancy projects.

[0006] To achieve the above-mentioned technical effects, the present invention adopts the following solution: A clamping tool for welding bent pipes in water conservancy projects includes: Load-bearing components, used to provide support and stability; The clamping component, installed on the upper end of the bearing component, is used to clamp the bend so that the bend is placed in an "L" shape in the vertical direction; The limiting component, installed on the upper end of the bearing component and located below the clamping component, includes a straight pipe limiting plate and a bent pipe limiting plate arranged in a straight line in the horizontal direction. The straight pipe limiting plate is used to place the straight pipe horizontally, and the bent pipe limiting plate is used to place the bent pipe. The upper end of the straight pipe limiting plate is provided with a first limiting groove, and the upper end of the bent pipe limiting plate is provided with a second limiting groove, so that the end of the bent pipe to be welded is kept on the same straight line as the straight pipe. The lifting component, wherein the limiting component is mounted on the bearing component via the lifting component, is used to adjust the height of the limiting component.

[0007] In a preferred embodiment, the lifting component includes a connector. The straight pipe limiting plate and the curved pipe limiting plate are both mounted on the upper end of the connector via a support member and are spaced apart from each other. The straight pipe limiting plate and the curved pipe limiting plate are not connected, forming a space for welding operations. A fixed first screw rod is vertically mounted on the lower end of the connector. A rotating adjusting sleeve is provided on the bearing component. The first screw rod passes through the adjusting sleeve, and the inner wall of the adjusting sleeve has threads matching the first screw rod. The adjusting sleeve is driven to rotate by a first driving mechanism. The connector is also connected to a vertical guide mechanism.

[0008] In a preferred embodiment, the first driving mechanism includes a worm gear fixedly sleeved on the outer wall of the adjusting sleeve and a worm rotatably mounted on the bearing component and meshing with the worm gear. One end of the worm is connected to a first handwheel located on one side of the bearing component via a transmission shaft.

[0009] In a preferred embodiment, the clamping component includes two opposing arc-shaped clamping plates, which are positioned directly above the bend limit plate. The two arc-shaped clamping plates are mounted on a bracket and slide horizontally. The bracket is fixedly mounted on the bearing component, and the two arc-shaped clamping plates are driven by a second driving mechanism to slide synchronously relative to each other or in opposite directions.

[0010] In a preferred embodiment, the second driving mechanism includes two parallel guide rails, both of which are horizontally fixed on a bracket. The two guide rails are arranged one above the other, and two sliders that slide on the guide rails are sandwiched between the two guide rails. Two arc-shaped clamps are distributed and fixed on one side of the two sliders, and a connecting part is fixed on the other side of the two sliders. A bidirectional screw rod is rotatably mounted on the bracket and is parallel to the guide rails. The bidirectional screw rod passes through the two connecting parts to drive the two sliders to slide synchronously. A second handwheel is fixedly connected to one end of the bidirectional screw rod.

[0011] In a preferred embodiment, the bidirectional screw rod and the two guide rails are arranged in a triangular shape.

[0012] Compared with existing technologies, the beneficial effects are: This utility model has a simple structure and is easy to use. The bent pipe is clamped and fixed by the clamping component, and the lower end of the bent pipe is placed on the bent pipe limiting plate and located in the second limiting groove, thereby limiting the height and orientation of the end of the bent pipe to be welded. The straight pipe is placed on the straight pipe limiting plate and located in the first limiting groove, thereby limiting the height and orientation of the straight pipe. Since the straight pipe limiting plate and the bent pipe limiting plate are on the same straight line, the end of the bent pipe to be welded is aligned with the straight pipe on the same straight line, thereby ensuring a straight connection after welding. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 yes Figure 1 Another perspective structural diagram.

[0015] Figure 3 This is a schematic diagram of the lifting component in this utility model.

[0016] Figure 4 This is a schematic diagram of the clamping component in this utility model.

[0017] Figure 5 This is a schematic diagram of the structure of this utility model in use.

[0018] Reference numerals: 10, bearing component; 101, bearing base plate; 102, support leg; 20, clamping component; 201, arc-shaped clamping plate; 202, bracket; 203, guide rail; 204, slider; 205, connecting part; 206, bidirectional screw rod; 207, second handwheel; 30, limiting component; 301, straight pipe limiting plate; 302, bent pipe limiting plate; 303, first limiting groove; 304, second limiting groove; 40, lifting component; 401, connecting piece; 402, support piece; 403, first screw rod; 404, adjusting bar; 405, bearing; 4061, worm gear; 4062, worm; 4063, drive shaft; 4064, first handwheel; 4071, guide rod; 4072, guide sleeve. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] A clamping tool for welding bent pipes in water conservancy projects includes: a load-bearing component 10, a clamping component 20, a limiting component 30, and a lifting component 40.

[0021] The support component 10 is used for support and stability, including a support base plate 101 and four rectangular legs 102 arranged at the lower end of the support base plate 101.

[0022] The clamping component 20 is installed on the upper end of the bearing component 10, specifically on the upper end of the bearing substrate 101, and is used to clamp the bent pipe so that the bent pipe is placed in an "L" shape in the vertical direction, so that the end of the bent pipe that needs to be welded faces the horizontal direction.

[0023] The limiting component 30 is installed on the upper end of the bearing component 10, specifically the upper end of the bearing substrate 101, and is located below the clamping component 20. It includes a straight pipe limiting plate 301 and a bent pipe limiting plate 302 arranged in a straight line in the horizontal direction. The straight pipe limiting plate 301 is used to place a straight pipe horizontally, and the bent pipe limiting plate 302 is used to place a bent pipe. The upper end of the straight pipe limiting plate 301 is provided with a first limiting groove 303, which is provided through the straight pipe limiting plate 301 along its length direction. The upper end of the bent pipe limiting plate 302 is provided with a second limiting groove 304, which is provided through the bent pipe limiting plate 302 along its length direction, so that the end of the bent pipe to be welded is kept in the same straight line as the straight pipe.

[0024] The limiting component 30 is mounted on the bearing component 10 via the lifting component 40 for height adjustment, and is used to accommodate bends and straight pipes of different diameters.

[0025] The bent pipe is clamped and fixed by the clamping component 20, and the lower end of the bent pipe is placed on the bent pipe limiting plate 302 and located in the second limiting groove 304, thereby limiting the height and orientation of the end of the bent pipe to be welded. The straight pipe is placed on the straight pipe limiting plate 301 and located in the first limiting groove 303, thereby limiting the height and orientation of the straight pipe. Since the straight pipe limiting plate 301 and the bent pipe limiting plate 302 are on the same straight line, the end of the bent pipe to be welded is aligned with the straight pipe on the same straight line, thereby ensuring a straight connection after welding.

[0026] In a preferred embodiment, the lifting component 40 includes a connector 401. The straight pipe limiting plate 301 and the curved pipe limiting plate 302 are both mounted on the upper end of the connector 401 via a support member 402 and are spaced apart from each other. The straight pipe limiting plate 301 and the curved pipe limiting plate 302 are not connected and have a certain distance between them, forming a space for welding operations. A fixed first screw rod 403 is vertically mounted on the lower end of the connector 401. The bearing component 10 is provided with a rotating adjusting sleeve, specifically, the adjusting sleeve is mounted on the bearing base plate 101 via a bearing 405 for rotation. The first screw rod 403 passes through the adjusting sleeve, and the inner wall of the adjusting sleeve has a thread matching the first screw rod 403. The adjusting sleeve is driven to rotate by a first driving mechanism. The connector 401 is also connected to a vertical guide mechanism.

[0027] A vertical guide mechanism ensures that the connector 401 can only move vertically. A first drive mechanism drives an adjusting sleeve to rotate. The thread on the inner wall of the adjusting sleeve engages with a first screw rod 403, allowing the first screw rod 403 to push against the connector 401 and move it up and down, thus adjusting its height. Due to the self-locking property of the thread itself, the connector 401 will not descend freely due to gravity. The guide mechanism includes at least three guide rods 4071 evenly distributed around the first screw rod 403. The guide rods 4071 are vertically fixed to the lower end of the connector 401. A guide sleeve 4072, which mates with each guide rod 4071, is fixedly provided on the supporting base plate 101.

[0028] In a preferred embodiment, the first driving mechanism includes a worm gear 4061 fixedly sleeved on the outer wall of the adjusting sleeve and a worm 4062 rotatably mounted on the bearing component 10 and meshing with the worm gear 4061. One end of the worm 4062 is connected to a first handwheel 4064 located on one side of the bearing component 10 via a transmission shaft 4063.

[0029] Turn the first handwheel 4064 by hand, which drives the worm gear 4062 to rotate through the transmission shaft 4063. Through the connection between the worm gear 4062 and the turbine, the adjusting sleeve is driven to rotate.

[0030] In a preferred embodiment, the clamping component 20 includes two opposing arc-shaped clamping plates 201, which are positioned directly above the bend limit plate 302. The two arc-shaped clamping plates 201 are mounted on a bracket 202 and slide horizontally. The bracket 202 is fixedly mounted on the bearing component 10, and the two arc-shaped clamping plates 201 are driven by a second driving mechanism to slide synchronously relative to each other or in opposite directions.

[0031] The second drive mechanism drives two arc-shaped clamping plates 201 to slide synchronously towards each other, which can be used to clamp the bent pipe. The two arc-shaped clamping plates 201 slide synchronously in opposite directions, which can release the bent pipe.

[0032] In a preferred embodiment, the second driving mechanism includes two parallel guide rails 203, both of which are horizontally fixed on a bracket 202. The two guide rails 203 are arranged one above the other, and two sliders 204 that slide on the guide rails 203 are sandwiched between them. Two arc-shaped clamping plates 201 are fixedly distributed on one side of the two sliders 204, and a connecting part 205 is fixedly provided on the other side of the two sliders 204. A bidirectional screw rod 206, which is parallel to the guide rails 203, is rotatably provided on the bracket 202. The bidirectional screw rod 206 passes through the two connecting parts 205 to drive the two sliders 204 to slide synchronously. The bidirectional screw rod 206 has two reverse threads, which is a prior art technology. The two connecting parts 205 are respectively provided on the threads at both ends. A second handwheel 207 is fixedly connected to one end of the bidirectional screw rod 206.

[0033] Turn the second handwheel 207 by hand, which will drive the bidirectional screw rod 206 to rotate, thereby causing the two connecting parts 205 to move synchronously on the threads at both ends of the bidirectional screw rod 206.

[0034] In a preferred embodiment, the bidirectional screw rod 206 and the two guide rails 203 are arranged in a triangular shape. This provides the slider 204 with three triangular support points, making the slider 204 more stable and preventing it from wobbling.

[0035] In the description of this utility model, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A clamping tool for pipe bending and welding in hydraulic engineering, characterized in that, include: The load-bearing component (10) is used for support and stability. The clamping component (20) is installed on the upper end of the bearing component (10) and is used to clamp the bend so that the bend is placed in an "L" shape in the vertical direction; The limiting component (30) is installed on the upper end of the bearing component (10) and located below the clamping component (20). It includes a straight pipe limiting plate (301) and a bent pipe limiting plate (302) arranged in a straight line in the horizontal direction. The straight pipe limiting plate (301) is used to place the straight pipe horizontally, and the bent pipe limiting plate (302) is used to place the bent pipe. The upper end of the straight pipe limiting plate (301) is provided with a first limiting groove (303), and the upper end of the bent pipe limiting plate (302) is provided with a second limiting groove (304), so that the end of the bent pipe to be welded is kept on the same straight line as the straight pipe. The lifting component (40) and the limiting component (30) are mounted on the bearing component (10) via the lifting component (40) for adjusting the height of the limiting component (30).

2. The bend welding clamping tool for hydraulic structures according to claim 1, wherein The lifting component (40) includes a connector (401). The straight pipe limiting plate (301) and the bent pipe limiting plate (302) are both installed on the upper end of the connector (401) through a support (402) and are separated from the connector (401). The straight pipe limiting plate (301) and the bent pipe limiting plate (302) are not connected to each other, forming a space for welding operations. A fixed first screw rod (403) is vertically installed on the lower end of the connector (401). The bearing component (10) is provided with a rotating adjusting sleeve. The first screw rod (403) passes through the adjusting sleeve, and the inner wall of the adjusting sleeve is provided with a thread that matches the first screw rod (403). The adjusting sleeve is driven to rotate by a first driving mechanism. The connector (401) is also connected to a vertical guide mechanism.

3. The bend welding clamping tool for hydraulic structures according to claim 2, wherein The first drive mechanism includes a worm wheel (4061) fixedly sleeved on the outer wall of the adjusting sleeve and a worm (4062) rotatably mounted on the bearing component (10) and meshing with the worm wheel (4061). One end of the worm (4062) is connected to a first handwheel (4064) located on one side of the bearing component (10) via a transmission shaft (4063).

4. The clamping tool for welding bent pipes in water conservancy projects as described in claim 1, characterized in that, The clamping component (20) includes two opposing arc-shaped clamping plates (201). The two arc-shaped clamping plates (201) are positioned above the bend pipe limiting plate (302). The two arc-shaped clamping plates (201) are mounted on a bracket (202) and slide horizontally. The bracket (202) is fixedly mounted on the bearing component (10). The two arc-shaped clamping plates (201) are driven by a second driving mechanism to slide synchronously relative to each other or in opposite directions.

5. The clamping tool for welding bent pipes in water conservancy projects as described in claim 4, characterized in that, The second driving mechanism includes two parallel guide rails (203), both of which are horizontally fixed on the bracket (202). The two guide rails (203) are arranged one above the other. Two sliders (204) that slide on the guide rails (203) are sandwiched between the two guide rails (203). Two arc-shaped clamps (201) are fixedly distributed on one side of the two sliders (204). A connecting part (205) is fixedly provided on the other side of the two sliders (204). A bidirectional screw rod (206) parallel to the guide rails (203) is rotatably provided on the bracket (202). The bidirectional screw rod (206) passes through the two connecting parts (205) to drive the two sliders (204) to slide synchronously. A second handwheel (207) is fixedly connected to one end of the bidirectional screw rod (206).

6. The clamping tool for welding bent pipes in water conservancy projects as described in claim 5, characterized in that, The bidirectional screw rod (206) and the two guide rails (203) are arranged in a triangular shape.