A heating and plumbing pipeline field welding fixture

Abstract

The utility model relates to the technical field of welding discloses a kind of heating and ventilation pipeline field welding fixture, including fixed frame, the fixed frame is provided with adjusting mechanism, the fixed frame top is provided with fixed mechanism;The fixed mechanism includes lower snap ring, the lower snap ring inside rotation is connected with shaft, one side The shaft side wall rotation is connected with upper snap ring, the upper snap ring inside is equipped with recess, another side The shaft side wall is fixedly connected with rotating block, the rotating block side wall is fixedly connected with screw rod, the screw rod side wall is threadedly connected with knob.In the utility model, by adhering to the lower snap ring pipeline bottom, then rotating upper snap ring to pipeline top, subsequently overturning screw rod makes it by rotating block spin into recess, and rotates knob, makes it move downward along screw rod, until adhering snap ring two top, to complete the clamping fixation of pipeline, by the cooperation between above-mentioned structure, reach the effect that it is convenient to fix.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a field welding fixture for HVAC pipes. Background Technology

[0002] In large-scale building construction, industrial plants, and municipal engineering projects, HVAC ducts serve as the primary channels for transporting hot and cold fluids, and their installation quality directly affects the operational efficiency and stability of the entire system. Due to the complex environment and limited space at construction sites, HVAC duct connections typically require on-site welding. To ensure accurate pipe positioning and tight weld joints during welding, construction workers utilize specialized on-site welding fixtures. These fixtures serve to fix the pipes, adjust the joint angle, and prevent misalignment during welding, thus improving welding quality and construction efficiency. They are indispensable tools in on-site pipe connection processes.

[0003] Existing HVAC duct welding fixtures typically consist of a support structure, a positioning mechanism, and a clamping device. Common types include chain clamps, sliding rail positioners, and adjustable clamps. These fixtures mostly employ helical or hydraulic transmission structures, using manual or mechanical means to fix and position the pipes. However, clamps are often designed as separate units, requiring at least two workers for installation. Furthermore, fixing the pipes through bolt holes on both sides is cumbersome and affects installation efficiency. Therefore, this paper proposes a new HVAC duct welding fixture to address these issues. Summary of the Invention

[0004] To overcome the above shortcomings, this utility model provides a field welding clamp for HVAC ducts, which aims to improve the problem that the existing clamps are mostly of a split design, and fixing them with bolts on both sides is cumbersome and affects the installation efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A field welding fixture for HVAC ducts includes a fixed frame, the fixed frame being provided with an adjustment mechanism, and a fixing mechanism being provided at the top of the fixed frame;

[0007] The fixing mechanism includes a lower retaining ring, a rotating shaft is rotatably connected inside the lower retaining ring, an upper retaining ring is rotatably connected to one side wall of the rotating shaft, the upper retaining ring has a groove inside, a rotating block is fixedly connected to the other side wall of the rotating shaft, a screw is fixedly connected to the side wall of the rotating block, and a knob is threadedly connected to the side wall of the screw.

[0008] As a further description of the above technical solution:

[0009] The adjustment mechanism includes a fixed base, a slide block, and a hydraulic rod. A fixed rod is fixedly connected inside the fixed frame. The fixed base is fixedly connected to the center of the fixed rod. The slide block is slidably connected to the side wall of the fixed rod. The hydraulic rod is fixedly connected to the bottom of the slide block on one side. The output end of the slide block is fixedly connected to the side wall of the fixed base.

[0010] As a further description of the above technical solution:

[0011] A connecting block is fixedly connected to the side wall of the lower retaining ring, and the side wall of the connecting block is fixedly connected to the top of the slide.

[0012] As a further description of the above technical solution:

[0013] A central column is fixedly connected to the top of the fixed base, and a rotating plate is rotatably connected to the side wall of the central column.

[0014] As a further description of the above technical solution:

[0015] Each slide block sidewall is rotatably connected to a connecting plate, and the opposite side of each connecting plate is rotatably connected to the sidewall of the rotating plate.

[0016] As a further description of the above technical solution:

[0017] The bottom of the fixed frame is fixedly connected to a support leg, and the side wall of the support leg is rotatably connected to a pulley.

[0018] As a further description of the above technical solution:

[0019] The screw is located inside the groove, and the bottom of the knob is in contact with the side wall of the upper retaining ring.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, by attaching the lower retaining ring to the bottom of the pipe, rotating the upper retaining ring to the top of the pipe, then flipping the screw so that it is screwed into the groove through the rotating block, and rotating the knob to move it downward along the screw until it is attached to the top of the second retaining ring, the pipe is clamped and fixed. Through the cooperation between the above structures, the effect of easy fixing is achieved, which solves the problem that the installation of traditional split retaining rings is relatively troublesome.

[0022] 2. In this utility model, when it is necessary to change the clamping distance, the hydraulic rod can be activated to drive one side of the slide to move. At the same time, one side of the connecting plate will deflect, and the other side will rotate synchronously under the deflection of the rotating plate, so that the other side of the connecting plate will also deflect, thereby driving the slide to move synchronously, achieving flexible adjustment of the clamp position and better docking with the pipeline. Attached Figure Description

[0023] Figure 1This is a three-dimensional schematic diagram of a field welding fixture for HVAC pipes proposed in this utility model;

[0024] Figure 2 This is a schematic diagram of the fixing mechanism of a field welding fixture for HVAC pipes proposed in this utility model;

[0025] Figure 3 This is a schematic diagram of the adjustment mechanism of a field welding fixture for HVAC pipes proposed in this utility model.

[0026] Legend:

[0027] 1. Fixed frame; 2. Connecting block; 3. Lower retaining ring; 4. Rotating shaft; 5. Upper retaining ring; 6. Groove; 7. Rotating block; 8. Screw; 9. Knob; 10. Fixed rod; 11. Fixed seat; 12. Slide; 13. Hydraulic rod; 14. Center column; 15. Rotating plate; 16. Connecting plate; 17. Support leg; 18. Pulley. Detailed Implementation

[0028] 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.

[0029] Reference Figures 1-3This utility model provides an embodiment of a field welding fixture for HVAC pipes, including a fixed frame 1. The fixed frame 1 is equipped with an adjustment mechanism, which can flexibly adjust the position of the fixture according to different construction locations, thereby better connecting the pipes and improving the welding accuracy. A fixing mechanism is provided at the top of the fixed frame 1 for fixing the pipes to be welded, ensuring a stable and non-displaced welding process. The fixing mechanism includes a lower retaining ring 3, with a rotating shaft 4 rotatably connected inside the lower retaining ring 3. An upper retaining ring 5 is rotatably connected to the side wall of one side of the rotating shaft 4. The pipe is fixed when the lower retaining ring 3 and the upper retaining ring 5 are closed. A groove 6 is provided inside the upper retaining ring 5. A rotating block 7 is fixedly connected to the side wall of the other side of the rotating shaft 4. A screw 8 is fixedly connected to the side wall of the rotating block 7. The screw 8 is threaded to the side wall. A knob 9 is connected to the upper retaining ring 5. The tension of the upper retaining ring 5 is adjusted by rotating the knob 9. Rotating the knob 9 moves it downward and closes it to the upper retaining ring 5 to lock the position of the lower retaining ring 3 and the upper retaining ring 5. The adjustment mechanism includes a fixed base 11, a slide 12 and a hydraulic rod 13. The slide 12 is slidably connected to the side wall of the fixed rod 10. A connecting block 2 is fixedly connected to the side wall of the lower retaining ring 3. The side wall of the connecting block 2 is fixedly connected to the top of the slide 12. The screw 8 is set inside the groove 6. The bottom of the knob 9 is in contact with the side wall of the upper retaining ring 5. The squeezing between the bottom of the knob 9 and the upper retaining ring 5 ensures the stability of the clamping. The bottom of the fixed frame 1 is fixedly connected to the support leg 17. The side wall of the support leg 17 is rotatably connected to the pulley 18 to facilitate the movement of the entire clamp.

[0030] Reference Figures 1-3 A fixed rod 10 is fixedly connected inside the fixed frame 1. A fixed seat 11 is fixedly connected to the center of the fixed rod 10. A hydraulic rod 13 is fixedly connected to the bottom of one side slide 12. The output end of the slide 12 is fixedly connected to the side wall of the fixed seat 11. By activating the hydraulic rod 13, the slide 12 connected to it can be moved. A central column 14 is fixedly connected to the top of the fixed seat 11. A rotating plate 15 is rotatably connected to the side wall of the central column 14. A connecting plate 16 is rotatably connected to the side wall of the slide 12. The connecting plate 16 is rotatably connected to the side wall of the rotating plate 15 on the opposite side. When one side slide 12 moves, the connecting plate 16 on that side will deflect, and the connecting plate 16 on the other side will deflect through the rotating plate 15, thereby moving the slide 12 on the other side.

[0031] Working principle: When using this equipment, push it to the bottom of the HVAC pipe to be welded, so that the lower retaining ring 3 is attached to the bottom of the pipe. Then, rotate the upper retaining ring 5 to flip it to the top of the pipe. Then, flip the screw 8 so that it rotates into the groove 6 through the rotating block 7. Then, rotate the knob 9 to move it downward along the outside of the screw 8 until it is attached to the top of the upper retaining ring 5, thus completing the clamping and fixing of the pipe. When it is necessary to change the clamping distance, the hydraulic rod 13 can be activated to drive the slide 12 on one side to move. At the same time, one side of the connecting plate 16 connected to it will deflect, and the other side will deflect on the rotating plate 15 and drive it to rotate. This causes the connecting plate 16 on the other side to deflect, driving the slide 12 on the other side to move synchronously, thus achieving the adjustment effect.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 field welding fixture for HVAC ducts, comprising a fixing frame (1), characterized in that: The fixed frame (1) is provided with an adjustment mechanism, and the top of the fixed frame (1) is provided with a fixing mechanism; The fixing mechanism includes a lower retaining ring (3), a rotating shaft (4) is rotatably connected inside the lower retaining ring (3), an upper retaining ring (5) is rotatably connected to the side wall of the rotating shaft (4) on one side, a groove (6) is provided inside the upper retaining ring (5), a rotating block (7) is fixedly connected to the side wall of the rotating shaft (4) on the other side, a screw (8) is fixedly connected to the side wall of the rotating block (7), and a knob (9) is threadedly connected to the side wall of the screw (8).

2. The on-site welding fixture for HVAC ducts according to claim 1, characterized in that: The adjustment mechanism includes a fixed seat (11), a slide (12) and a hydraulic rod (13). A fixed rod (10) is fixedly connected inside the fixed frame (1). The fixed seat (11) is fixedly connected to the center of the fixed rod (10). The slide (12) is slidably connected to the side wall of the fixed rod (10). The hydraulic rod (13) is fixedly connected to the bottom of the slide (12) on one side. The output end of the slide (12) is fixedly connected to the side wall of the fixed seat (11).

3. The on-site welding fixture for HVAC ducts according to claim 1, characterized in that: The lower retaining ring (3) is fixedly connected to a connecting block (2) on its side wall, and the connecting block (2) is fixedly connected to the top of the slide block (12) on its side wall.

4. A field welding fixture for HVAC ducts according to claim 2, characterized in that: The top of the fixed base (11) is fixedly connected to a central column (14), and the side wall of the central column (14) is rotatably connected to a rotating plate (15).

5. A field welding fixture for HVAC ducts according to claim 4, characterized in that: Each slide (12) has a connecting plate (16) rotatably connected to its side wall, and the connecting plate (16) is rotatably connected to the side wall of the rotating plate (15) on the opposite side.

6. A field welding fixture for HVAC ducts according to claim 1, characterized in that: The bottom of the fixed frame (1) is fixedly connected to a support leg (17), and the side wall of the support leg (17) is rotatably connected to a pulley (18).

7. A field welding fixture for HVAC ducts according to claim 1, characterized in that: The screw (8) is set inside the groove (6), and the bottom of the knob (9) is in contact with the side wall of the upper retaining ring (5).

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