Pipe welding fixture

Abstract

The utility model discloses a pipeline welding fixing device relates to pipeline welding auxiliary technical field, include: base, moving plate is set up on the base through linear guide mechanism, and can move along horizontal direction, clamping mechanism sets up on the moving plate for clamping pipeline, the clamping mechanism includes the first movable block and the second movable block of symmetrical setting and the drive component of driving both synchronous opposite or opposite movement, fine adjustment mechanism sets up on the base and is located below the support plate, is used for the height of supporting and fine adjustment pipeline. The utility model discloses design structure is reasonable, it can through setting up by the clamping mechanism of screw rod, threaded block and movable block of opposite rotation, and cooperate carousel drive, can synchronous drive both sides movable block opposite or opposite movement, has realized the automatic positioning of pipeline center and quick clamping, has avoided the centering error of artificial adjustment effectively, has improved the centering accuracy and operation efficiency significantly.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary technology for pipeline welding, specifically a pipeline welding fixing device. Background Technology

[0002] In the installation of heating ducts (such as central air conditioning supply ducts), large thin-walled pipe sections often need to be welded on-site. These pipes are characterized by large diameter, thin walls, and poor rigidity. Traditional pipe welding and fixing devices (such as those disclosed in CN221019525U) mostly use a vertical clamping method. Pipeline welding is a key connection process in industrial production and engineering construction. Its quality directly affects the safety and service life of the entire pipeline system. During welding construction, ensuring that the two pipes to be welded are precisely aligned and stably fixed is a prerequisite for obtaining a high-quality welded joint. If there is center misalignment, uneven gap or angular deviation at the pipe interface, it is very easy to cause welding defects, such as incomplete penetration, slag inclusion or stress concentration, thus creating potential safety hazards.

[0003] Currently, the following methods are commonly used in the fixing and alignment of pipe welding: As disclosed in CN221019525U, the method of vertical compression from top to bottom can easily cause horizontal center offset when the pipe is placed, requiring repeated manual adjustments, which is inefficient.

[0004] There are also simple clamps and manual labor. Operators use simple V-blocks, jacks or chain clamps to initially position and fix the pipes. This method is cumbersome and inefficient, and it is difficult to achieve precise axial and radial alignment, resulting in poor welding quality stability.

[0005] There are also some pipe clamping devices on the market, which typically use mechanical structures such as screws and clamps to clamp the pipes. However, these devices are often single-function, mostly only able to clamp the pipes, and lack the ability to finely adjust the height (vertical direction) of the pipe joint. In actual operation, due to the weight of the pipe or installation stress, misalignment of the joint (i.e., inconsistent height of the edges of the two pipes) often occurs, and existing equipment is difficult to effectively correct this.

[0006] In some construction scenarios, it is necessary to first use one set of equipment to fix the pipeline, and then use another set of jacking equipment to adjust the height. The process is complicated, and the coordination is difficult, making it impossible to achieve fast and integrated operation.

[0007] Therefore, the main problem with the existing technology is that there is a lack of a pipe welding fixing device that integrates reliable clamping, convenient centering and height fine adjustment, which cannot meet the urgent needs of high-efficiency and high-precision welding operations. Utility Model Content

[0008] (a) Technical problems to be solved The purpose of this invention is to overcome the shortcomings of the existing technology and provide a pipe welding and fixing device.

[0009] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a pipe welding and fixing device, comprising: a base; a movable plate, which is mounted on the base via a linear guide mechanism and is movable in the horizontal direction; A clamping mechanism is provided on the movable plate for clamping the pipe. The clamping mechanism includes a first movable block and a second movable block arranged symmetrically, and a drive assembly that drives the two blocks to move synchronously toward or away from each other. A fine-tuning mechanism, disposed on the base and located below the support plate, is used to support and fine-tune the height of the pipe. The fine-tuning mechanism includes a press-type hydraulic cylinder and a support plate that is driven to rise and fall by the press-type hydraulic cylinder.

[0010] Furthermore, the linear guide mechanism includes at least two linear slide rails horizontally laid on the upper surface of the base, and a linear slider slidably disposed on the linear slide rails, with the movable plate fixedly installed above the linear slider.

[0011] Furthermore, handles are fixedly or detachably installed at both ends of the movable plate.

[0012] Furthermore, the driving assembly includes: a first threaded rod and a second threaded rod rotatably disposed in the movable plate, the first threaded rod and the second threaded rod having opposite thread directions; a first threaded block threadedly engaged with the first threaded rod, the first movable block being fixed to the first threaded block; a second threaded block threadedly engaged with the second threaded rod, the second movable block being fixed to the second threaded block; and a turntable for driving the first threaded rod and the second threaded rod to rotate synchronously.

[0013] Furthermore, a groove is provided in the middle of the movable plate, and a baffle is fixed in the center of the groove; bearings are embedded in the movable plate and the baffle, and the rotating shaft passes through the bearings; the first threaded rod and the second threaded rod are respectively fixed between the opposite surfaces of the two rotating shafts.

[0014] Furthermore, the first movable block and / or the second movable block are provided with a tightening band on their sides, and the first threaded block and / or the second threaded block are provided with a plurality of insertion holes for fixing the ends of the tightening band, and are locked by a pin.

[0015] Furthermore, the relative clamping surfaces of the first movable block and the second movable block are V-shaped or arc-shaped to match the outer wall of the pipe.

[0016] Furthermore, a support block for supporting the tunnel is fixed on the upper surface of the support plate, and the top of the support block is V-shaped or arc-shaped.

[0017] Furthermore, the fine-tuning mechanism also includes a limiting structure for preventing the support plate from rotating or shifting horizontally. The limiting structure includes a limiting groove formed at the bottom end of the support plate and a limiting block fixed to the piston rod of the press-type hydraulic cylinder and slidingly engaged with the limiting groove.

[0018] Furthermore, the mating cross section of the limiting groove and the limiting block is rectangular, T-shaped, or dovetail-shaped.

[0019] (III) Beneficial Effects: Compared with existing technologies, this pipe welding and fixing device has the following advantages: I. This utility model, by setting up a clamping mechanism consisting of a threaded rod with opposite rotation direction, a threaded block, and a movable block, and cooperating with a turntable drive, can synchronously drive the movable blocks on both sides to move towards or away from each other, realizing automatic positioning and rapid clamping of the pipe center, effectively avoiding the centering error caused by manual adjustment, and significantly improving centering accuracy and work efficiency.

[0020] Second, this utility model, by setting a tightening band and a pin cooperation structure on the sides of the first and second movable blocks, can circumferentially clamp the pipe after radial clamping. This design greatly enhances the pipe's resistance to torsion and rolling after fixing, ensuring that the pipe will not shift or rotate due to external force or thermal stress during the welding process, thereby ensuring the stability and quality of the welded joint.

[0021] Second, this utility model uses a fine-tuning mechanism consisting of a press-type hydraulic cylinder and a support plate set on the base to precisely adjust the height of the clamped pipe interface. This function can effectively correct the misalignment problem of the interface caused by the pipe's own weight, manufacturing tolerances or installation deviations, so that the two pipe interfaces are perfectly aligned in the vertical direction, providing a key guarantee for obtaining high-quality welds. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram showing the disassembled push-type hydraulic cylinder and support plate in this utility model; Figure 3 This is a schematic diagram of the movable plate, movable block, and linear slide rail of this utility model; Figure 4 This is a bottom view of the movable plate in this utility model; Figure 5 This is a bottom view of the support plate in this utility model; Figure 6 This is a schematic diagram of the movable plate and linear slide rail in this utility model; Figure 7 This is a partial cross-sectional view of the movable plate in this utility model; Figure 8 This is a schematic diagram of the first movable block in this utility model; Figure 9 This is a schematic diagram of the first threaded rod and the second threaded rod in this utility model.

[0023] In the diagram: 1. Base; 2. Linear slide rail; 3. Linear slider; 4. Moving plate; 5. Press-type hydraulic cylinder; 6. Support plate; 7. Support block; 8. Handle; 9. Turntable; 10. First movable block; 11. Tightening belt; 12. Second movable block; 13. Limiting block; 14. Pin; 15. Limiting groove; 16. Groove; 17. Baffle; 18. First threaded rod; 19. Second threaded rod; 20. First threaded block; 21. Second threaded block; 22. Bearing; 23. Rotating shaft. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0025] like Figures 1 to 9 As shown, this utility model provides a pipe welding fixing device, which is mainly used to reliably clamp, center, and fine-tune the interface position of the pipe during the pipe butt welding process.

[0026] The pipe welding and fixing device includes a base 1, which can be fixed to a designated working position by means of anchor bolts, etc. Two linear slide rails 2 are horizontally laid on the upper surface of the base 1. Each linear slide rail 2 is equipped with a linear slider 3 that can slide along its length. A moving plate 4 is fixedly installed above all the linear sliders 3 by bolts or other fastening methods, so that the moving plate 4 can move smoothly in the horizontal direction together with the linear sliders 3, thereby realizing the coarse alignment of the pipe in the axial direction.

[0027] For ease of operation, handles 8 are preferably fixedly installed at both ends of the movable plate 4. Operators can easily push the movable plate 4 and all its components along the linear slide rail 2 by holding the handles 8. In some embodiments, the handles 8 are detachably connected to the movable plate 4 for easy transportation and maintenance.

[0028] The core function of the movable plate 4 is to support and drive the clamping mechanism. Specifically, a through groove 16 is provided in the middle of the movable plate 4. A baffle 17 is fixed in the center of the groove 16, dividing the groove 16 into two parts. A first threaded rod 18 and a second threaded rod 19 are respectively provided in the two parts. The two threaded rods are connected by a rotating shaft 23. A bearing 22 sleeved on the surface of the rotating shaft 23 is embedded in the baffle 17. The other end of the first threaded rod 18 and the second threaded rod 19 passes through the rotating shaft 23 to the outside of the movable plate 4 and is fixed to a turntable 9. The bearing 22 is embedded in the movable plate 4. Preferably, the threads of the first threaded rod 18 and the second threaded rod 19 are opposite in direction.

[0029] The first threaded rod 18 and the second threaded rod 19 are engaged with the first threaded block 20 and the second threaded block 21. They are respectively engaged with the corresponding threaded rods through internal threads. The first movable block 10 is fixed above the first threaded block 20, and the second movable block 12 is fixed above the second threaded block 21. The clamping surfaces of the first movable block 10 and the second movable block 12 can be designed as a V-shape or arc shape that matches the outer wall of the pipe to increase the contact area and fixation stability.

[0030] To achieve the driving function, turntables 9 are fixedly installed at the positions of the movable plate 4 corresponding to the two ends of the rotating shaft 23. When the operator rotates either turntable 9, the rotating shaft 23 and the first threaded rod 18 and the second threaded rod 19 fixed thereto will rotate together. Since the two threaded rods rotate in opposite directions, when they rotate synchronously, the first threaded block 20 and the second threaded block 21 will move towards or away from each other at the same time, thereby driving the first movable block 10 and the second movable block 12 to clamp or loosen the pipe. This structure realizes the rapid positioning and clamping of the pipe center.

[0031] To further enhance the fixing effect on the pipeline, especially in preventing axial rotation of the pipeline, a tightening band 11 is provided on the side of the first movable block 10 and the second movable block 12. The tightening band 11 can be made of high-strength metal strip or flexible steel strip. After clamping the pipeline, the tightening band 11 can be wrapped around the pipeline. By selecting one of the multiple pre-set insertion holes on the surface of the first threaded block 20 or the second threaded block 21, the pin 14 can be inserted to fix the end of the tightening band 11, thereby forming a circumferential grip on the pipeline, which greatly improves the reliability of the fixing.

[0032] Another important function of the pipe welding and fixing device is the fine adjustment of the interface height. This function is achieved by a fine adjustment mechanism. At least one press-type hydraulic cylinder 5 is fixedly installed on the base 1. The piston rod of the press-type hydraulic cylinder 5 is vertically upward, and the support plate 6 is connected to the top of the piston rod of the press-type hydraulic cylinder 5. The upper surface of the support plate 6 is fixed with a support block 7 for directly supporting the pipe. The top of the support block 7 can also be set to V-shape or arc shape to better adapt to the shape of the pipe.

[0033] To ensure that the support plate 6 remains stable during lifting and lowering without rotating or shifting, a limiting structure is provided between the support plate 6 and the press-type hydraulic cylinder 5. Specifically, a limiting groove 15 (e.g., a rectangular groove, a T-shaped groove, or a dovetail groove) is provided at the bottom end of the support plate 6, and a limiting block 13 (e.g., a rectangular block, a T-shaped block, or a dovetail block) is fixed on the cylinder body or piston rod connection of the press-type hydraulic cylinder 5. The limiting block 13 engages or slides with the limiting groove 15, so that the support plate 6 can only move in the vertical direction and cannot rotate or swing horizontally.

[0034] The workflow of this utility model is as follows: Place the pipes: Place the two pipes to be welded on the movable plates 4 on both sides of the device.

[0035] Coarse alignment: The operator pushes the moving plate 4 with handle 8 to bring the ends of the pipes closer together for preliminary alignment.

[0036] Clamping and fixing: Rotate the turntable 9 to drive the first movable block 10 and the second movable block 12 to clamp the pipe. Then, use the tightening strap 11 to wrap around the pipe and lock it in the insertion hole of the threaded block with the pin 14 to achieve double fixing.

[0037] Fine-tuning the interface: Activate the press-type hydraulic cylinder 5, and fine-tune the height of the pipes through the support plate 6 and support block 7 to make the interface of the two pipes completely aligned, eliminate misalignment, and achieve the best welding and butt joint state.

[0038] Welding: After the pipes are reliably secured and aligned, the welder can begin the welding operation.

[0039] It should be noted that in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "fixed," "installed," "connected," and "linked" should be interpreted broadly. For example, "installed" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a mechanical connection or an electrical connection; "linked" can be a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pipe welding and fixing device, characterized in that, include: Base (1); Movable plate (4), which is set on the base (1) by a linear guide mechanism and can move in the horizontal direction; A clamping mechanism is provided on the movable plate (4) for clamping the pipe. The clamping mechanism includes a first movable block (10) and a second movable block (12) arranged symmetrically, and a drive assembly that drives the two to move synchronously towards or away from each other. A fine-tuning mechanism is provided on the base (1) and located below the support plate (6) for supporting and fine-tuning the height of the pipe. The fine-tuning mechanism includes a press-type hydraulic cylinder (5) and a support plate (6) that is driven to rise and fall by the press-type hydraulic cylinder (5).

2. The pipe welding and fixing device according to claim 1, characterized in that, The linear guide mechanism includes at least two linear slide rails (2) laid horizontally on the upper surface of the base (1), and a linear slider (3) slidably disposed on the linear slide rails (2), with the moving plate (4) fixedly installed above the linear slider (3).

3. The pipe welding and fixing device according to claim 1 or 2, characterized in that, The movable plate (4) has handles (8) fixedly or detachably installed at both ends.

4. The pipe welding and fixing device according to claim 1, characterized in that, The driving component includes: Rotate the first threaded rod (18) and the second threaded rod (19) disposed in the movable plate (4), the threads of the first threaded rod (18) and the second threaded rod (19) having opposite directions; A first threaded block (20) is threadedly engaged with the first threaded rod (18), and the first movable block (10) is fixed on the first threaded block (20); The second threaded block (21) is threadedly engaged with the second threaded rod (19), and the second movable block (12) is fixed on the second threaded block (21); A turntable (9) for driving the first threaded rod (18) and the second threaded rod (19) to rotate synchronously.

5. The pipe welding and fixing device according to claim 4, characterized in that, The movable plate (4) has a groove (16) in the middle, and a baffle (17) is fixed in the center of the groove (16); a bearing (22) is inlaid on the movable plate (4) and the baffle (17), and a rotating shaft (23) passes through the bearing (22). The first threaded rod (18) and the second threaded rod (19) are respectively fixed between the opposite surfaces of the two rotating shafts (23).

6. The pipe welding and fixing device according to claim 4, characterized in that, The first movable block (10) and / or the second movable block (12) are provided with a tightening band (11) on their sides. The first threaded block (20) and / or the second threaded block (21) are provided with a plurality of insertion holes for fixing the ends of the tightening band (11) and are locked by a pin (14).

7. The pipe welding and fixing device according to claim 1, characterized in that, The relative clamping surfaces of the first movable block (10) and the second movable block (12) are V-shaped or arc-shaped to match the outer wall of the pipe.

8. The pipe welding and fixing device according to claim 1, characterized in that, The upper surface of the support plate (6) is fixed with a support block (7) for supporting the tunnel, and the top of the support block (7) is V-shaped or arc-shaped.

9. The pipe welding and fixing device according to claim 1, characterized in that, The fine-tuning mechanism also includes a limiting structure for preventing the support plate (6) from rotating or shifting horizontally. The limiting structure includes a limiting groove (15) opened at the bottom end of the support plate (6) and a limiting block (13) fixed to the piston rod of the press-type hydraulic cylinder (5) and slidingly engaged with the limiting groove (15).

10. The pipe welding fixing device according to claim 9, characterized in that, The mating cross section of the limiting groove (15) and the limiting block (13) is rectangular, T-shaped or dovetail-shaped.

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