A drying machine heating pipe welding tool

Abstract

The utility model relates to drying -machine heating pipe welding technical field, specifically disclose a drying -machine heating pipe welding frock, including horizontal board, heating pipe body with through -hole, flange pipe and mounting plate, and the right side and left side of horizontal board upper end surface are fixedly connected with fixed plate and riser respectively, the right -hand end of riser is rotatably connected with screw rod, and the outer wall of screw rod is threadedly connected with thread cylinder, realize with the axial alignment of heating pipe body, and finally through spot welding preliminary fixation. This flow passes through multistage positioning structure, effectively avoids splicing deviation, and the welding precision is improved obviously, only needs to adjust the circumferential angle and clamping device manually when operating, and the rest steps are aligned automatically through preloading positioning block, positioning column, locating seat and support plate etc. structure, and the scheme simplifies the traditional complicated positioning flow through the synergistic effect of prepositioning structure and composite clamping system, greatly shortens the adjustment time, reduces artificial error simultaneously, and improves welding efficiency obviously.

Description

Technical Field

[0001] This utility model relates to the field of welding technology for heating tubes of dryers, and specifically discloses a welding fixture for heating tubes of dryers. Background Technology

[0002] In the manufacturing of dryers, the heating element is a core component, and its welding quality is crucial to the dryer's performance and service life. In actual production, flanges (for pipe connections) and functional component mounting plates need to be welded to designated locations on the heating element. The welding accuracy of these two components directly affects the dryer's assembly compatibility, temperature control accuracy, and media flow sealing.

[0003] Traditional heating element welding processes rely on manual measurement, marking, and assembly. Because welding of flanges and functional component mounting plates must be completed at designated locations, the entire process requires manual measurement, marking, and assembly, resulting in time-consuming and labor-intensive operations that severely impact welding efficiency. Furthermore, manual measurement, marking, and assembly are prone to significant deviations, making it difficult to guarantee welding accuracy and consequently affecting the dryer's assembly quality and performance stability. Therefore, a new welding fixture for dryer heating elements is needed to address these issues. Utility Model Content

[0004] This utility model proposes a welding fixture for heating tubes of a dryer, which simplifies the operation process and saves time by replacing manual measurement and marking with mechanical positioning, thus significantly improving welding efficiency; at the same time, it effectively prevents large positioning deviations during splicing, thereby greatly improving welding accuracy.

[0005] This utility model is implemented as follows: a welding fixture for a drying machine heating tube includes a horizontal plate, a heating tube body with a through hole, a flange tube, and a mounting plate. A fixing plate and a vertical plate are fixedly connected to the right and left sides of the upper surface of the horizontal plate, respectively. A screw is rotatably connected to the right end of the vertical plate. A threaded cylinder is threadedly connected to the outer wall of the screw. A movable plate is fixedly connected to the right end of the threaded cylinder. Rigid anti-slip washers that abut against the left and right ends of the heating tube body are installed on the opposite sides of the movable plate and the fixing plate. Multiple positioning blocks arranged in a circumferential array and in contact with the outer wall of the heating tube body are fixedly connected to the opposite sides of the movable plate and the fixing plate.

[0006] A self-locking drive mechanism is provided on the left side of the screw;

[0007] The upper end of the horizontal plate is fixedly connected to a positioning seat located in front of the heating tube body, and the upper end of the positioning seat is provided with an arc-shaped groove that fits against the outer wall of the flange tube.

[0008] The upper end of the horizontal plate is slidably connected to a push plate via a first trapezoidal groove and a first trapezoidal slider, and the rear end of the push plate is fixedly connected to a positioning post located directly in front of the through hole.

[0009] A support plate is provided at the front of the heating tube body, which is attached to the lower end of the mounting plate, and a positioning strip is fixedly connected to the upper end of the support plate, which is attached to the right end of the mounting plate.

[0010] As a preferred embodiment of the welding fixture for the heating tube of the dryer according to this utility model, the self-locking drive mechanism includes a drive frame fixedly connected to the left end of the vertical plate, a worm gear rotatably connected inside the drive frame, a worm wheel meshing with the outer wall of the worm gear, a transmission shaft fixedly connected between the worm wheel and the screw, a connecting rod penetrating the drive frame fixedly connected to the upper end of the worm gear, a disc fixedly connected to the upper end of the connecting rod, and a handle rotatably connected to the eccentric part of the upper end of the disc.

[0011] As a preferred embodiment of the welding fixture for the heating tube of a dryer according to this utility model, a tapered guide head is fixedly connected to the rear end of the positioning column.

[0012] As a preferred embodiment of the welding fixture for the heating tube of the dryer according to this utility model, the upper end of the horizontal plate is provided with a second trapezoidal groove, and a second trapezoidal slider that is fixedly connected to the moving plate is slidably connected inside the second trapezoidal groove.

[0013] As a preferred embodiment of the welding fixture for the heating tube of the dryer according to this utility model, two connecting plates are fixedly connected between the support plate and the horizontal plate.

[0014] As a preferred embodiment of the welding fixture for the heating tube of a dryer according to this utility model, a pusher is fixedly connected to the front end of the pusher plate.

[0015] As a preferred embodiment of the welding fixture for the heating tube of the dryer according to this utility model, the left and right sides of the lower end face of the horizontal plate are fixedly connected with mounting brackets with multiple mounting holes.

[0016] The beneficial effects of this utility model are:

[0017] 1. During operation, the heating tube body is placed on the upper surface of a horizontal plate and contacts the rigid anti-slip washer on the left side of the fixing plate. The circumferentially arrayed positioning blocks on the fixing plate adhere to the outer wall of the heating tube body, achieving initial positioning. Then, the circumferential angle of the heating tube body is manually adjusted so that the through hole aligns with the positioning post. The push plate is then pushed to insert the positioning post into the inner wall of the through hole, completing circumferential positioning. A self-locking drive mechanism drives the screw to rotate, causing the threaded cylinder to move the moving plate to the right. The axial clamping of the rigid anti-slip washers at both ends and the limiting position of the positioning blocks form a composite fixing structure, ensuring stable clamping of the heating tube body. The flange pipe and mounting plate are positioned by the arc groove of the positioning seat, and the support plate and positioning strip abut against and limit the movement, achieving alignment with the axis of the heating tube body. Finally, initial fixing is achieved through spot welding. This process, through a multi-stage positioning structure, effectively avoids splicing deviations and significantly improves welding accuracy.

[0018] 2. The entire process utilizes mechanical positioning to replace traditional manual measurement and marking. During operation, only the circumferential angle and clamping device need to be manually adjusted; the remaining steps are automatically aligned by pre-installed positioning blocks, positioning columns, positioning seats, and support plates. Before welding, the clamping device can be loosened, and the tilt angle of the flange pipe and mounting plate can be manually adjusted to avoid interference from the welding torch. The angle can then be re-clamped to ensure a stable welding process. This solution simplifies the traditional, cumbersome positioning process through the synergistic effect of the pre-set positioning structure and the composite clamping system, significantly shortening adjustment time, reducing human error, and substantially improving welding efficiency. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a front sectional view of the welding fixture for heating tubes of a dryer according to the present invention.

[0021] Figure 2 This is a partial right-side cross-sectional view of the present invention;

[0022] Figure 3 This is a partial structural diagram of the present invention;

[0023] Figure 4 This is a partial structural diagram of the present invention.

[0024] The markings in the diagram are: 1. Horizontal plate; 2. Heating tube body; 3. Through hole; 4. Flange pipe; 5. Mounting plate; 6. Fixing plate; 7. Vertical plate; 8. Screw; 9. Threaded cylinder; 10. Moving plate; 11. Rigid anti-slip washer; 12. Positioning block; 13. Second trapezoidal groove; 14. Second trapezoidal slider; 15. Drive frame; 16. Worm gear; 17. Worm wheel; 18. Connecting rod; 19. Disc; 20. Positioning seat; 21. Arc groove; 22. First trapezoidal groove; 23. First trapezoidal slider; 24. Push plate; 25. Positioning column; 26. Support plate; 27. Positioning strip. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0026] Please see Figure 1-4A welding fixture for heating tubes of a dryer includes a horizontal plate 1, a heating tube body 2 with through holes 3, a flange tube 4, and a mounting plate 5. A fixing plate 6 and a vertical plate 7 are fixedly connected to the right and left sides of the upper end face of the horizontal plate 1, respectively. A screw 8 is rotatably connected to the right end of the vertical plate 7. A threaded cylinder 9 is threadedly connected to the outer wall of the screw 8. A movable plate 10 is fixedly connected to the right end of the threaded cylinder 9. Rigid anti-slip washers 11 that abut against the left and right ends of the heating tube body 2 are installed on the opposite sides of the movable plate 10 and the fixing plate 6, respectively. Multiple positioning blocks 12 that are arranged in a circumferential array and fit against the outer wall of the heating tube body 2 are fixedly connected to the opposite sides of the movable plate 10 and the fixing plate 6.

[0027] A self-locking drive mechanism is provided on the left side of screw 8;

[0028] The upper end of the horizontal plate 1 is fixedly connected to a positioning seat 20 located in front of the heating tube body 2. The upper end of the positioning seat 20 is provided with an arc-shaped groove 21 that fits against the outer wall of the flange tube 4.

[0029] The upper end of the horizontal plate 1 is slidably connected to a push plate 24 via a first trapezoidal groove 22 and a first trapezoidal slider 23. The rear end of the push plate 24 is fixedly connected to a positioning post 25 located directly in front of the through hole 3.

[0030] A support plate 26 is provided at the front of the heating tube body 2, which is attached to the lower end of the mounting plate 5. A positioning strip 27 is fixedly connected to the upper end of the support plate 26, which is attached to the right end of the mounting plate 5.

[0031] In this embodiment: When in use, the heating tube body 2 is positioned on the upper surface of the horizontal plate 1, and its right end is in contact with the rigid anti-slip pad 11 on the left side of the fixing plate 6. Multiple positioning blocks 12 arranged in a circumferential array on the fixing plate 6 are attached to the outer wall of the right end of the heating tube body 2 to perform preliminary positioning of the heating tube body 2.

[0032] Subsequently, the heating tube body 2 is manually rotated to adjust its circumferential angle so that the through hole 3 on the heating tube body 2 is aligned with the positioning post 25 at the front end of the horizontal plate 1. The push plate 24 is pushed and moved. Due to the cooperation between the first trapezoidal slider 23 and the first trapezoidal groove 22, the push plate 24 is kept in a linear motion state. At the same time, the positioning post 25 is moved backward until the positioning post 25 enters the interior of the through hole 3. The positioning post 25 will fit against the inner wall of the through hole 3, thereby positioning the circumferential angle of the heating tube body 2.

[0033] Then, the screw 8 is rotated by the self-locking drive mechanism, and the threaded cylinder 9 moves to the right along the screw 8, which drives the moving plate 10 to move to the right in sync. The rigid anti-slip washer 11 on the right side of the moving plate 10 abuts against the left end of the heating tube body 2. At the same time, multiple positioning blocks 12 are attached to the outer wall of the left end of the heating tube, forming a composite fixing structure with the rigid anti-slip washer 11 at both ends axially clamping and the positioning block 12 limiting, thereby completing the stable clamping of the heating tube body 2.

[0034] Then push the push plate 24 in the opposite direction, so that the positioning column 25 exits the through hole 3 and moves forward to the initial position, and places the flange tube 4 in the arc groove 21 of the positioning seat 20. The arc groove 21 fits against the outer wall of the flange tube 4. Since the positioning seat 20 is fixed in a suitable position in advance, it ensures that the axis of the flange tube 4 is coaxial with the axis of the through hole 3 of the heating tube body 2. Then spot welding is performed at the joint of the flange tube 4 and the heating tube body 2 to initially fix the flange tube 4 and the heating tube body 2.

[0035] Next, place the mounting plate 5 on the upper surface of the support plate 26, so that its lower end is in contact with the support plate 26 and its right end abuts against the positioning strip 27. The positioning strip 27 restricts the mounting plate 5 and connects the mounting plate 5 with the heating tube body 2. Then, spot weld the mounting plate 5 and the heating tube body 2 at the connection point to initially fix the mounting plate 5 and the heating tube body 2. Since the positioning strip 27 and the support plate 26 are pre-installed in the appropriate position, the mounting plate 5 is ensured to be in the appropriate position.

[0036] By combining the above operating steps, the flange pipe 4 and the mounting plate 5 can be fixed at the designated position of the heating pipe body 2, effectively preventing large positioning deviations during the splicing process, thereby greatly improving the welding accuracy.

[0037] Then the screw 8 is reversed, the moving plate 10 moves to the left, and the clamping on the heating tube body 2 is released. At this time, the tilt angle of the flange tube 4 and the mounting plate 5 can be manually adjusted so that the flange tube 4 and the mounting plate 5 are at an angle that is convenient for welding, so as to avoid interference of the welding gun. Then the moving plate 10 is moved to the right to re-clamp the heating tube body 2 to ensure that the adjusted angle remains unchanged, and then the welding work can be carried out.

[0038] This solution replaces manual measurement and marking with mechanical positioning, simplifying the operation process, saving time, and significantly improving welding efficiency.

[0039] As a technical optimization of this utility model, the self-locking drive mechanism includes a drive frame 15 fixedly connected to the left end of the upright plate 7. A worm gear 16 is rotatably connected inside the drive frame 15. A worm wheel 17 is meshed with the outer wall of the worm gear 16. A transmission shaft is fixedly connected between the worm wheel 17 and the screw 8. A connecting rod 18 that passes through the drive frame 15 is fixedly connected to the upper end of the worm gear 16. A disc 19 is fixedly connected to the upper end of the connecting rod 18. A handle is rotatably connected to the eccentric part of the upper end of the disc 19.

[0040] In this embodiment: rotating the handle on the disc 19 causes the connecting rod 18 and the worm gear 16 to rotate. The worm gear 16 drives the worm wheel 17 to rotate, which in turn drives the screw 8 to rotate synchronously through the transmission shaft. The worm gear 16 and worm wheel 17 transmission has a reverse self-locking characteristic. When the handle is stopped, the worm wheel 17 cannot drive the worm gear 16 in the reverse direction through the screw 8, thereby locking the position of the moving plate 10 and preventing the clamping force from loosening due to vibration during welding.

[0041] As a technical optimization of this utility model, a tapered guide head is fixedly connected to the rear end of the positioning post 25.

[0042] In this embodiment: when the tapered guide head at the rear end of the positioning post 25 is inserted into the through hole 3, it is automatically aligned by the inclined surface, reducing the time required for manual alignment.

[0043] As a technical optimization of this utility model, a second trapezoidal groove 13 is provided at the upper end of the horizontal plate 1, and a second trapezoidal slider 14 that is fixedly connected to the moving plate 10 is slidably connected inside the second trapezoidal groove 13.

[0044] In this embodiment, by setting the second trapezoidal groove 13 and the second trapezoidal slider 14, the moving plate 10 can be moved along a straight line.

[0045] As a technical optimization of this utility model, two connecting plates are fixedly connected between the support plate 26 and the horizontal plate 1.

[0046] In this embodiment, the support plate 26 is fixed in a designated position by setting two connecting plates.

[0047] As a technical optimization of this utility model, a pusher is fixedly connected to the front end of the push plate 24.

[0048] In this embodiment: the pusher can be used to manually push the push plate 24 to control the insertion and withdrawal of the positioning column 25.

[0049] As a technical optimization of this utility model, the left and right sides of the lower end face of the horizontal plate 1 are fixedly connected with mounting brackets with multiple mounting holes.

[0050] In this embodiment: by setting a mounting bracket, the device can be installed and fixed on the workbench surface in conjunction with fasteners.

[0051] The working principle and usage process of this utility model: When in use, the heating tube body 2 is positioned on the upper surface of the horizontal plate 1, and its right end is in contact with the rigid anti-slip pad 11 on the left side of the fixing plate 6. Multiple positioning blocks 12 arranged in a circular array on the fixing plate 6 are attached to the outer wall of the right end of the heating tube body 2 to perform preliminary positioning of the heating tube body 2.

[0052] Subsequently, the heating tube body 2 is manually rotated to adjust its circumferential angle so that the through hole 3 on the heating tube body 2 is aligned with the positioning post 25 at the front end of the horizontal plate 1. The pusher installed on the outer wall of the pusher plate 24 pushes the pusher plate 24 to move. Due to the cooperation between the first trapezoidal slider 23 and the first trapezoidal groove 22, the pusher plate 24 is kept in a linear motion state, while driving the positioning post 25 to move backward until the positioning post 25 enters the interior of the through hole 3. The positioning post 25 will fit against the inner wall of the through hole 3, thereby positioning the circumferential angle of the heating tube body 2.

[0053] Then rotate the handle on the disc 19 to drive the connecting rod 18 and the worm gear 16 to rotate. The worm gear 16 meshes with the worm wheel 17 to drive the screw 8 to rotate through the transmission shaft. When the screw 8 rotates, the threaded cylinder 9 moves to the right along the screw 8, which drives the moving plate 10 to move to the right in sync. The rigid anti-slip washer 11 on the right side of the moving plate 10 abuts against the left end of the heating tube body 2. At the same time, multiple positioning blocks 12 are attached to the outer wall of the left end of the heating tube, forming a composite fixing structure with the rigid anti-slip washer 11 at both ends axially clamping and the positioning block 12 limiting, thereby completing the stable clamping of the heating tube body 2.

[0054] Then push the push plate 24 in the opposite direction, so that the positioning column 25 exits the through hole 3 and moves forward to the initial position, and places the flange tube 4 in the arc groove 21 of the positioning seat 20. The arc groove 21 fits against the outer wall of the flange tube 4. Since the positioning seat 20 is fixed in a suitable position in advance, it ensures that the axis of the flange tube 4 is coaxial with the axis of the through hole 3 of the heating tube body 2. Then spot welding is performed at the joint of the flange tube 4 and the heating tube body 2 to initially fix the flange tube 4 and the heating tube body 2.

[0055] Next, place the mounting plate 5 on the upper surface of the support plate 26, so that its lower end is in contact with the support plate 26 and its right end abuts against the positioning strip 27. The positioning strip 27 restricts the mounting plate 5 and connects the mounting plate 5 with the heating tube body 2. Then, spot weld the mounting plate 5 and the heating tube body 2 at the connection point to initially fix the mounting plate 5 and the heating tube body 2. Since the positioning strip 27 and the support plate 26 are pre-installed in the appropriate position, the mounting plate 5 is ensured to be in the appropriate position.

[0056] By combining the above operating steps, the flange pipe 4 and the mounting plate 5 can be fixed at the designated position of the heating pipe body 2, effectively preventing large positioning deviations during the splicing process, thereby greatly improving the welding accuracy.

[0057] Then rotate the disc 19 in the opposite direction to reverse the screw 8 and move the moving plate 10 to the left to loosen the clamp on the heating tube body 2. At this time, the tilt angle of the flange tube 4 and the mounting plate 5 can be manually adjusted so that the flange tube 4 and the mounting plate 5 are at an angle that is convenient for welding to avoid interference with the welding gun. Then, move the moving plate 10 to the right to re-clamp the heating tube body 2 to ensure that the adjusted angle remains unchanged, and then the welding work can be carried out.

[0058] This solution replaces manual measurement and marking with mechanical positioning, simplifying the operation process, saving time, and significantly improving welding efficiency.

[0059] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., 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.

[0060] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A welding fixture for heating tubes of a dryer, comprising a horizontal plate (1), a heating tube body (2) with a through hole (3), a flange pipe (4), and a mounting plate (5), characterized in that: A fixed plate (6) and a vertical plate (7) are fixedly connected to the right and left sides of the upper surface of the horizontal plate (1), respectively. A screw (8) is rotatably connected to the right end of the vertical plate (7). A threaded cylinder (9) is threadedly connected to the outer wall of the screw (8). A movable plate (10) is fixedly connected to the right end of the threaded cylinder (9). Rigid anti-slip washers (11) that abut against the left and right ends of the heating tube body (2) are installed on the opposite sides of the movable plate (10) and the fixed plate (6). Multiple positioning blocks (12) that are arranged in a circumferential array and fit against the outer wall of the heating tube body (2) are fixedly connected to the opposite sides of the movable plate (10) and the fixed plate (6). A self-locking drive mechanism is provided on the left side of the screw (8); The upper end of the horizontal plate (1) is fixedly connected to a positioning seat (20) located in front of the heating tube body (2), and the upper end of the positioning seat (20) is provided with an arc groove (21) that fits against the outer wall of the flange tube (4). The upper end of the horizontal plate (1) is slidably connected to a push plate (24) through a first trapezoidal groove (22) and a first trapezoidal slider (23), and the rear end of the push plate (24) is fixedly connected to a positioning post (25) located directly in front of the through hole (3); A support plate (26) is provided in front of the heating tube body (2) and is attached to the lower end of the mounting plate (5). A positioning strip (27) is fixedly connected to the upper end of the support plate (26) and is attached to the right end of the mounting plate (5).

2. The welding fixture for heating tubes of a dryer according to claim 1, characterized in that: The self-locking drive mechanism includes a drive frame (15) fixedly connected to the left end of the upright plate (7). A worm (16) is rotatably connected inside the drive frame (15). A worm wheel (17) is meshed with the outer wall of the worm (16). A transmission shaft is fixedly connected between the worm wheel (17) and the screw (8). A connecting rod (18) that passes through the drive frame (15) is fixedly connected to the upper end of the worm (16). A disc (19) is fixedly connected to the upper end of the connecting rod (18). A handle is rotatably connected to the eccentric part of the upper end of the disc (19).

3. The welding fixture for heating tubes of a dryer according to claim 1, characterized in that: The rear end of the positioning post (25) is fixedly connected to a tapered guide head.

4. The welding fixture for heating tubes of a dryer according to claim 1, characterized in that: The upper end of the horizontal plate (1) is provided with a second trapezoidal groove (13), and the interior of the second trapezoidal groove (13) is slidably connected with a second trapezoidal slider (14) which is fixedly connected to the moving plate (10).

5. The welding fixture for heating tubes of a dryer according to claim 1, characterized in that: The support plate (26) and the horizontal plate (1) are fixedly connected by two connecting plates.

6. The welding fixture for heating tubes of a dryer according to claim 1, characterized in that: A pusher is fixedly connected to the front end of the push plate (24).

7. The welding fixture for heating tubes of a dryer according to claim 1, characterized in that: The horizontal plate (1) has mounting brackets with multiple mounting holes fixedly connected to both the left and right sides of its lower end face.

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