Pipe wear plate welding fixture

Abstract

The utility model discloses a pipeline anti -wear tile welding clamp, it includes fixed frame, and the both sides edge between two fixed frames is fixed with support frame symmetry, and the front and rear two ends of every support frame respectively are swing telescopic connection with the support rod of L shape, is equipped with the clamping subassembly in the clamping frame, and the clamping subassembly includes the several locking rods that are connected on the clamping frame along the even arrangement, and the locking rod is connected with the clamping frame through the clamping spring, and the wedge extrusion block and the top end swing contact of locking rod. Advantage: through the mode of rotation gear drive support rod and slide to both sides and support on the inner wall of boiler, make this clamp also can be fixed in the inside of boiler without the intervention of external force and not slip, convenient for construction personnel to free up both hands and carry out the welding operation. Through the locking rod to the pipeline anti -wear tile of different thickness and fix the holding, make this clamp can adapt to the thickness of different pipeline, save the tedious process of changing clamp back and forth, greatly promote the work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of pipeline welding technology, and in particular to a welding fixture for pipeline wear-resistant tiles. Background Technology

[0002] In boiler operating systems, pipe abrasion protectors are critical protective components that safeguard heated pipe surfaces from wear and corrosion. Pipes within the boiler furnace and flue, such as superheater tubes, reheater tubes, and economizer tubes, are constantly exposed to harsh environments of high temperature, high-velocity flue gas, and high concentrations of fly ash. These conditions make them susceptible to thinning of the pipe walls due to fly ash erosion, particle impact, and thermal fatigue wear. In severe cases, this can lead to pipe rupture and leakage, causing unplanned boiler shutdowns and even safety accidents. Pipe abrasion protectors typically employ a segmented design, requiring butt welding to achieve continuous coverage of the pipe's outer wall. The quality of this welding directly determines the protective effectiveness of the abrasion protector.

[0003] Existing anti-wear tile welding fixtures are mostly simple, manual mechanical structures, with the core consisting of a main frame, clamping components, adjusting screws, and a handle. The main frame is a U-shaped or ring-shaped structure welded from steel plates, serving as the load-bearing foundation of the fixture. The clamping components consist of two arc-shaped jaws, with rubber anti-slip pads lined the inner side of the jaws, which are connected to the jaws via an adjusting screw running through the frame. During operation, rotating the handle drives the screw to extend or retract, achieving radial clamping of the anti-wear tile by the jaws.

[0004] The existing clamps used for butt welding of wear-resistant tiles have the following technical defects: First, the clamps lack support and fixation capabilities. The existing clamps lack a rigid connection structure with boiler pipes or furnace walls, and cannot provide stable support on their own in the confined space inside the boiler. Construction workers need to hold the clamps by hand to maintain positioning, which can easily lead to misalignment of the ends due to hand tremors during welding, resulting in defects such as weld undercut and incomplete penetration, and even stress concentration points, reducing the service life of the wear-resistant tiles. Second, there are operational safety hazards. When welding with the clamps by hand, construction workers need to simultaneously pay attention to positioning and welding operations. Fatigue can easily cause the clamps to fall off, which not only affects the welding quality but may also cause the tools to fall and injure equipment or personnel. Utility Model Content

[0005] The purpose of this utility model is to provide a pipe anti-wear tile welding fixture with reliable positioning and clamping to ensure welding quality.

[0006] This utility model is implemented by the following technical solution: a pipe anti-wear tile welding clamp, which includes two oppositely arranged fixed frames, and a support frame symmetrically fixed between the two side edges of the two fixed frames; each support frame has an L-shaped support rod movably and retractably connected to its front and rear ends; a slide is rotatably provided inside the fixed frame, and a clamping frame connected to the support frame passes through the slide; the clamping frame has a clamping assembly inside; the clamping assembly includes a plurality of locking rods evenly arranged and connected to the clamping frame along the circumference, the locking rods are connected to the clamping frame through clamping springs, and a wedge-shaped extrusion block corresponding to each locking rod is fixed on the inner wall of the slide; the wedge-shaped extrusion block is in movable contact with the top end of the locking rod.

[0007] Furthermore, a positioning plate is slidably provided on the outer wall of the fixed frame, and a drive rod is connected to the positioning plate. The end of the drive rod passes through the fixed frame and is connected to the slide. Several positioning holes are provided circumferentially on the outer wall of the fixed frame. A T-shaped positioning rod is connected to the outer surface of the positioning plate through a positioning spring. The vertical end of the positioning rod is movably placed in the corresponding positioning hole.

[0008] Furthermore, each of the support frames is rotatably provided with a gear, which meshes with the teeth on the longitudinal sections of each of the support rods on both sides.

[0009] Furthermore, the central shaft of the gear is connected to the drive assembly, which includes an adjusting block, a T-shaped adjusting rod, a positioning post, and a return spring. The support frame is provided with the adjusting block connected to the central shaft of the gear, and a plurality of positioning posts with limiting holes are fixed around the adjusting block on the support frame. The adjusting block has a polygonal hole, and the vertical section of the adjusting rod is slidably inserted into the polygonal hole. The return spring is connected between the top surface of the adjusting block and the horizontal section of the adjusting rod. Limiting rods that are movably inserted into the limiting holes corresponding to the positioning posts are fixed at both ends of the horizontal section of the adjusting rod.

[0010] The advantages of this utility model are: 1. By rotating the gear, the support rod slides to both sides and is supported on the inner wall of the boiler. This allows the clamp to be fixed inside the boiler without slipping, freeing up the workers' hands for welding operations. 2. The locking rod secures and holds pipe anti-wear tiles of different thicknesses, allowing the clamp to adapt to different pipe diameters, eliminating the tedious process of changing clamps repeatedly and greatly improving work efficiency. 3. The thickness of the pipe anti-wear tiles that the locking rod can fix can be adjusted by rotating the slide. Simultaneously, the positioning rod engages with the fixing frame, ensuring that the clamp will not loosen during construction, thus improving the stability of the clamp. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a diagram showing the usage state of the locking rod described in this utility model when it is clamped under force.

[0014] Figure 3 This is a top view of the present invention.

[0015] Figure 4 This is a top view illustrating the internal structure of the support frame of this utility model.

[0016] The components in the attached diagram are labeled as follows: 1. Fixing frame, 1.1. Positioning hole, 2. Slide, 3. Positioning plate, 4. Positioning rod, 5. Positioning spring, 6. Wedge-shaped pressing block, 7. Locking rod, 8. Clamping spring, 9. Support frame, 10. Gear, 11. Support rod, 12. Adjusting block, 13. Adjusting rod, 14. Return spring, 15. Positioning post, 15.1. Limiting hole, 16. Clamping frame, 17. Drive rod, 18. Detailed Implementation

[0017] 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.

[0018] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only 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.

[0019] like Figures 1 to 4As shown, this embodiment provides a pipe anti-wear tile welding fixture, which includes two opposing fixed frames 1, with support frames 9 symmetrically fixed between the two side edges of the two fixed frames 1, and a slide 2 rotatably provided inside the fixed frame 1.

[0020] Both the fixed frame 1 and the slide 2 are cylindrical structures. The outer wall of the slide 2 rotates against the inner wall of the fixed frame 1. A positioning plate 3 is slidably provided on the outer wall of the fixed frame 1. A drive rod 17 is connected to the positioning plate 3. The end of the drive rod 17 passes through the fixed frame 1 and connects to the slide 2. The fixed frame 1 has an elongated hole for the drive rod 17 to move. Several positioning holes 1.1 are provided circumferentially on the outer wall of the fixed frame 1. The outer surface of the positioning plate 3 is connected to the transverse section of the T-shaped positioning rod 4 through the positioning spring 5. The vertical end of the positioning rod 4 passes through the positioning plate 3 and is movably placed in the corresponding positioning hole 1.1. Pulling the positioning rod 4 outward overcomes the force of the positioning spring 5, causing the positioning rod 4 to disengage from the positioning hole 1.1. At this time, it is convenient to move the positioning plate 3, and the drive rod 17 drives the slide 2 to rotate synchronously.

[0021] The slide 2 is equipped with a clamping frame 16 connected to the support frame 9. The clamping frame 16 has a cylindrical structure and a clamping assembly is provided inside the clamping frame 16. The clamping assembly includes several locking rods 7 evenly arranged and connected to the clamping frame 16 along the circumference. The locking rods 7 are connected to the clamping frame 16 through clamping springs 8. The bottom end of the locking rod 7 is placed inside the clamping frame 16. The inner wall of the slide 2 is fixed with wedge-shaped extrusion blocks 6 that correspond one-to-one with the locking rods 7. The wedge-shaped extrusion blocks 6 are in movable contact with the top end of the locking rods 7. During the rotation of the slide 2, the wedge-shaped extrusion blocks 6 are driven to rotate synchronously. The wedge-shaped extrusion blocks 6 extrude the corresponding locking rods 7 and move them toward the center of the clamping frame 16 to clamp the welded pipe.

[0022] Each support frame 9 is equipped with a rotating gear 10. The gear 10 meshes with the teeth on the longitudinal section of each L-shaped support rod 11 on both sides. During the rotation of the gear 10, the support rods 11 on both sides move in opposite directions so that they abut against the inner wall of the boiler through the transverse section of the support frame 9. Rubber pads are fixed on the outer wall of the transverse section of the support rod 11 to increase the friction with the inner wall of the boiler.

[0023] The central shaft of gear 10 is connected to the drive assembly, which includes an adjusting block 12, a T-shaped adjusting rod 13, a positioning post 15, and a return spring 14. The support frame 9 is provided with an adjusting block 12 connected to the central shaft of gear 10. Several positioning posts 15 with limiting holes 15.1 are fixed around the adjusting block 12 on the support frame 9. The adjusting block 12 has a quadrilateral hole. The vertical section of the adjusting rod 13 has a quadrilateral cross-section that matches the quadrilateral hole and is slidably inserted into the quadrilateral hole. A return spring 14 is connected between the top surface of the adjusting block 12 and the horizontal section of the adjusting rod 13. Limiting rods 18 are fixed at both ends of the horizontal section of the adjusting rod 13 and are movably inserted into the limiting holes 15.1 of the corresponding positioning posts 15. Overcoming the tension of the return spring 14, the adjusting rod 13 is pulled outward, causing the limiting rods 18 to disengage from the limiting holes 15.1. Rotating the adjusting rod 13 causes the adjusting block 12 to drive the gear 10 to rotate, thereby driving the extension or retraction of the support rod 11.

[0024] Usage: First, pull the adjusting rod 13 upwards, simultaneously stretching the return spring 14. The limiting rod 18 on the adjusting rod 13 disengages from the limiting hole 15.1 of the positioning stake 15, allowing the adjusting rod 13 to rotate. The rotation of the adjusting rod 13 drives the adjusting block 12 to rotate, which in turn drives the gear 10 to rotate. The gear 10, through meshing with the support rod 11, causes the support rod 11 to slide outwards towards the support frame 9. The rubber pad at one end of the support rod 11 supports the fixture against the inner wall of the boiler. At this point, release the adjusting rod 13. Under the action of the return spring 14, the limiting rod 18 on the adjusting rod 13 engages within the limiting hole 15.1 of the corresponding positioning stake 15, preventing the adjusting rod 13 from rotating during welding and ensuring the stability of the fixture.

[0025] Then, one end of the pipe to be welded is placed on one of the fixing brackets 1. The positioning rod 4 is pulled upward and the positioning spring 5 is stretched. The positioning rod 4 disengages from the fixing bracket 1, allowing the positioning plate 3 to slide. The sliding of the positioning plate 3 causes the slide 2 to rotate inside the fixing bracket 1. The slide 2 squeezes the locking rod 7 through the wedge-shaped extrusion block 6. The locking rod 7 is squeezed and slides into the fixing bracket 1, compressing the clamping spring 8, until the locking rod 7 clamps the pipe anti-wear tile. At this time, the positioning rod 4 is released, and the positioning rod 4 engages with the fixing bracket 1, so that the slide 2 cannot rotate and the locking rod 7 maintains its clamping effect on the pipe anti-wear tile. Repeat the above process to clamp another pipe anti-wear tile inside another fixing bracket 1, and the pipe anti-wear tile can be butt welded, which increases the overall practicality.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A welding fixture for pipe wear-resistant tiles, characterized in that, It includes two opposing fixed frames, and a support frame is symmetrically fixed between the two side edges of the two fixed frames; Each of the support frames has an L-shaped support rod that is movably and retractably connected to both its front and rear ends; The fixed frame is rotatably equipped with a slide, and a clamping frame connected to the support frame passes through the slide. The clamping frame is equipped with a clamping assembly. The clamping assembly includes a plurality of locking rods evenly arranged circumferentially and connected to the clamping frame. The locking rods are connected to the clamping frame through clamping springs. The inner wall of the slide is fixed with wedge-shaped pressing blocks that correspond one-to-one with the locking rods. The wedge-shaped pressing blocks are in movable contact with the top of the locking rods.

2. The pipe wear-resistant tile welding fixture according to claim 1, characterized in that, A positioning plate is slidably provided on the outer wall of the fixed frame, and a drive rod is connected to the positioning plate. The end of the drive rod passes through the fixed frame and is connected to the slide. Several positioning holes are provided circumferentially on the outer wall of the fixed frame. A T-shaped positioning rod is connected to the outer surface of the positioning plate through a positioning spring. The vertical end of the positioning rod is movably placed in the corresponding positioning hole.

3. The pipe wear-resistant tile welding fixture according to claim 1, characterized in that, Each of the support frames is rotatably equipped with a gear, which meshes with the teeth on the longitudinal sections of each of the support rods on both sides.

4. The pipe wear-resistant tile welding fixture according to claim 3, characterized in that, The central shaft of the gear is connected to the drive assembly, which includes an adjusting block, a T-shaped adjusting rod, a positioning post, and a return spring. The support frame is provided with the adjusting block connected to the central shaft of the gear, and a plurality of positioning posts with limiting holes are fixed around the adjusting block on the support frame. The adjusting block has a polygonal hole, and the vertical section of the adjusting rod is slidably inserted into the polygonal hole. The return spring is connected between the top surface of the adjusting block and the horizontal section of the adjusting rod. Limiting rods that are movably inserted into the limiting holes corresponding to the positioning posts are fixed at both ends of the horizontal section of the adjusting rod.

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