Pipeline assembly welding clamp

Abstract

The utility model relates to a pipeline assembly welding clamp which comprises a main body, the interior of the main body is of a hollow structure so as to contain two sections of pipelines to be welded, a centering auxiliary part is arranged on the inner wall of the main body, and centering positioning parts which are symmetrically distributed relative to the centering auxiliary part are arranged on the side wall of the main body. The length of the portion, extending into the main body, of the centering positioning piece is adjustable, the centering auxiliary piece and the centering positioning piece are both in contact with the outer wall of a to-be-welded pipeline, a spot welding opening is further formed in the side edge of the main body, an air pipe connecting piece is arranged at the spot welding opening, and the air pipe connecting piece is connected with an external air source through an air pipe. According to the pipeline assembly welding clamp, the technical problems that an existing clamp is only suitable for assembly welding of pipelines of a single specification, passive heat dissipation is adopted after welding, and consumed time is long can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline welding, in particular to a pipeline assembly welding fixture. Background Art

[0002] During pipeline construction, the pipelines need to be assembled first and then welded. Existing pipe clamps are only suitable for spot welding of pipes of a single specification, which has great limitations. During pipeline construction, a large number of pipe clamps need to be customized according to the pipeline specifications to meet the needs of the pipeline construction site. The manufacturing cost is high, and the space occupied is large, and the economic benefits are low. At the same time, stainless steel pipe welding requires three steps: priming, filling, and covering. After filling, the stainless steel pipes need to be passively cooled. This is mainly because the high interlayer temperature will cause the grains in the heat-affected zone to coarsen, which will reduce the strength and low-temperature impact toughness of the weld. For austenitic stainless steel, it will also accelerate the oxidation process of the metal, causing the weld to turn black. Traditional heat dissipation methods use natural cooling or direct fan blowing, and the covering is performed after the weld temperature drops. This is time-consuming and greatly affects work efficiency. Utility Model Content

[0003] In view of the various deficiencies of the existing technology, a pipe group welding fixture is proposed to solve the technical problems that the existing fixture is only suitable for welding pipe groups of a single specification and uses passive heat dissipation after welding, which is time-consuming.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A pipe group welding fixture includes a main body, the interior of the main body is configured as a hollow structure to accommodate two sections of pipes to be welded, a centering auxiliary part is provided on the inner wall of the main body, and a centering positioning part symmetrically distributed relative to the centering auxiliary part is provided on the side wall of the main body, the length of the centering positioning part extending into the interior of the main body is adjustable, the centering auxiliary part and the centering positioning part are both in contact with the outer wall of the pipe to be welded, and a spot welding port is further provided on the side of the main body, an air pipe connector is provided at the spot welding port, and the air pipe connector is connected to an external air source through an air pipe for delivering cooling gas to the weld for active heat dissipation.

[0006] The technical solution is further configured such that the main body includes a first main body and a second main body, the first end of the first main body is hinged to the first end of the second main body, and the second end of the first main body is detachably connected to the second end of the second main body via a fastener.

[0007] The technical solution is further configured such that the centering auxiliary member is configured as a V-shaped angle iron, and the V-shaped opening is directly opposite to the central axis of the main body, and the angle iron is fixedly connected to the inner wall of the main body.

[0008] The technical solution is further configured such that the centering auxiliary member is configured as an arc-shaped pad, the inner diameter of the pad is the same as the outer diameter of the pipe to be welded, and the pad is detachably connected to the inner wall of the main body.

[0009] The technical solution is further configured such that the end of the centering positioning member passes through the side wall of the main body, and the length of the end extending into the interior of the main body is adjustable, and the end is provided with an anti-slip pad.

[0010] The technical solution is further configured such that, along the direction of the central axis of the main body, a plurality of centering positioning members are provided, and the plurality of centering positioning members are symmetrically distributed relative to the spot welding openings.

[0011] The technical solution is further configured such that a first end of the air pipe connector is detachably connected to the air pipe, and a second end of the air pipe connector is located inside the main body and is detachably connected to the gas nozzle.

[0012] The technical solution is further configured as follows: the main body is configured to be cylindrical, and a plurality of trachea connectors are provided around the circumference of the main body, and the plurality of trachea connectors are symmetrically distributed relative to the spot welding openings.

[0013] The beneficial effects of the utility model are:

[0014] By setting up centering auxiliary parts and centering positioning parts, and utilizing the triangle centering principle, the centers of the two sections of the pipes to be welded can be quickly aligned, and the centering positioning parts can be used to lock them, ensuring that the central axis of the pipes to be welded does not shift during the positioning process, thereby improving the welding quality; the length of the centering positioning parts extending into the interior of the main body is adjustable, and can be applied to pipes to be welded of various specifications, with strong versatility; by providing air pipe connectors to transport cooling gas to the weld for active heat dissipation, waiting time is saved and work efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an axial side view of a pipe assembly welding fixture in an embodiment of the present utility model;

[0016] Figure 2 This is a front view of a pipe assembly welding fixture in an embodiment of the present utility model;

[0017] Figure 3 It is a side view of a pipe assembly welding fixture in an embodiment of the present utility model.

[0018] In the accompanying drawings: 1. First body; 2. Second body; 3. Pipe to be welded; 4. Centering auxiliary part; 5. Centering positioning part; 6. Air pipe connector; 7. Spot welding port. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following is a clear and complete description of the technical solution of the present invention in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application. In addition, the directional terms mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional terms used are used to illustrate rather than limit the invention.

[0020] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0021] According to an embodiment of the present invention, a pipe assembly welding fixture is provided. Figures 1 to 3 , including a main body, the interior of the main body is set to a hollow structure to accommodate two sections of pipes to be welded 3, a centering auxiliary part 4 is provided on the inner wall of the main body, and a centering positioning part 5 symmetrically distributed with respect to the centering auxiliary part 4 is provided on the side wall of the main body, and the length of the centering positioning part 5 extending to the inside of the main body is adjustable, the centering auxiliary part 4 and the centering positioning part 5 are both in contact with the outer wall of the pipe to be welded 3, and a spot welding port 7 is further provided on the side of the main body, and an air pipe connector 6 is provided at the spot welding port 7, and the air pipe connector 6 is connected to the external air source through an air pipe, and is used to transport cooling gas to the weld for active heat dissipation.

[0022] It should be noted that, by setting the centering auxiliary parts 4 and the centering positioning parts 5, the triangle centering principle is utilized to quickly align the centers of the two sections of the pipes to be welded 3, and the centering positioning parts 5 are used to lock them, so as to ensure that the central axis of the pipes to be welded does not shift during the positioning process, thereby improving the welding quality; the length of the centering positioning parts 5 extending to the inside of the main body is adjustable, and can be applied to pipes to be welded of various specifications, with strong versatility; it is small in size and occupies little space, and is especially suitable for use in areas with dense pipelines; by setting the air pipe connector 6 to transport cooling gas to the weld for active heat dissipation, waiting time is saved and work efficiency is improved.

[0023] In the pipe assembly welding fixture of this embodiment, please refer to Figures 1 to 3 The main body includes a first main body 1 and a second main body 2. The first end of the first main body 1 is hinged to the first end of the second main body 2, and the second end of the first main body 1 is detachably connected to the second end of the second main body 2 by a fastener, which is convenient for disassembly and assembly.

[0024] In the pipe assembly welding fixture of this embodiment, please refer to Figures 1 to 3 The centering auxiliary component 4 is configured as a V-shaped angle iron, and the V-shaped opening is facing the central axis of the main body, and the angle iron is fixedly connected to the inner wall of the main body.

[0025] Specifically, the angle iron is arranged just above the inner wall of the main body, and at the same time, the angle iron is fixed to the inner wall of the main body by welding.

[0026] In the pipe assembly welding fixture of this embodiment, please refer to Figures 1 to 3 The centering auxiliary member 4 is configured as an arc-shaped pad, the inner diameter of the pad is the same as the outer diameter of the pipe 3 to be welded, and the pad is detachably connected to the inner wall of the main body.

[0027] Specifically, the pad is arranged directly above the inner wall of the main body, and the inner diameter of the pad is the same as the outer diameter of the pipe 3 to be welded, which helps to improve the fit between the pad and the pipe 3 to be welded; at the same time, the pad is detachably connected to the inner wall of the main body, and for pipes 3 to be welded of different specifications, only the pad needs to be replaced.

[0028] It should be noted that the pad can be detachably connected to the main body by bolts; the pad can also be detachably connected to the main body by magnetic attraction; in addition, the pad can also be detachably connected to the main body by a snap-fit ​​structure, such as a slot and a block.

[0029] In the pipe assembly welding fixture of this embodiment, please refer to Figures 1 to 3 The end of the centering positioning member 5 passes through the side wall of the main body, and the length of the end extending to the inside of the main body is adjustable, and the end is provided with an anti-slip pad.

[0030] It should be noted that in the longitudinal cross-section of the clamp, the centering auxiliary part 4 and the centering positioning part 5 form a triangular structure, which is convenient for centering and positioning; by adjusting the length of the end of the centering positioning part 5 extending to the inside of the main body, the pipe to be welded 3 is locked, so that the pipe to be welded 3 is positioned between the centering auxiliary part 4 and the centering positioning part 5.

[0031] In the pipe assembly welding fixture of this embodiment, please refer to Figures 1 to 3 Along the direction of the central axis of the main body, there are several centering positioning members 5, and the several centering positioning members 5 are symmetrically distributed relative to the spot welding opening 7 to improve positioning and locking stability.

[0032] In the pipe assembly welding fixture of this embodiment, please refer to Figures 1 to 3 The first end of the air pipe connector 6 is detachably connected to the air pipe, and the second end of the air pipe connector 6 is located inside the main body and is detachably connected to the gas nozzle.

[0033] It's important to note that depending on the need for heat dissipation at the welding site, gas pipes and gas nozzles should be installed. For example, after welding and filling stainless steel pipes, cooling gas can be introduced for active heat dissipation to quickly remove heat and reduce weld temperatures. Comparative testing has shown that active heat dissipation can save over 50% of time compared to passive heat dissipation.

[0034] In the pipe assembly welding fixture of this embodiment, please refer to Figures 1 to 3 The main body is set to be cylindrical, and several trachea connectors 6 are arranged around the circumference of the main body. The several trachea connectors 6 are symmetrically distributed relative to the spot welding port 7, which improves the heat dissipation uniformity and heat dissipation efficiency of the weld, saves waiting time, and improves work efficiency.

[0035] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. All equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A pipe assembly welding fixture, characterized in that: It includes a main body, the interior of the main body is set as a hollow structure to accommodate two sections of pipes to be welded, a centering auxiliary part is set on the inner wall of the main body, and a centering positioning part symmetrically distributed relative to the centering auxiliary part is set on the side wall of the main body. The length of the centering positioning part extending to the interior of the main body is adjustable, and the centering auxiliary part and the centering positioning part are both in contact with the outer wall of the pipe to be welded. Spot welding ports are also set on the side of the main body, and air pipe connectors are set at the spot welding ports. The air pipe connector is connected to the external air source through an air pipe, and is used to transport cooling gas to the weld for active heat dissipation.

2. The pipe assembly welding fixture according to claim 1, characterized in that: The main body includes a first main body and a second main body. The first end of the first main body is hinged to the first end of the second main body, and the second end of the first main body is detachably connected to the second end of the second main body via a fastener.

3. The pipe assembly welding fixture according to claim 1, characterized in that: The centering auxiliary component is configured as a V-shaped angle iron, with the V-shaped opening facing the central axis of the main body, and the angle iron is fixedly connected to the inner wall of the main body.

4. The pipe assembly welding fixture according to claim 1, characterized in that: The centering auxiliary component is configured as an arc-shaped pad, the inner diameter of the pad is the same as the outer diameter of the pipe to be welded, and the pad is detachably connected to the inner wall of the main body.

5. The pipe assembly welding fixture according to claim 1, characterized in that: The end of the centering positioning piece passes through the side wall of the main body, and the length of the end extending to the interior of the main body is adjustable, and the end is provided with an anti-slip pad.

6. The pipe assembly welding fixture according to claim 1 or 5, characterized in that: Along the direction of the central axis of the main body, a plurality of centering positioning members are provided, and the plurality of centering positioning members are symmetrically distributed relative to the spot welding openings.

7. The pipe assembly welding fixture according to claim 1, characterized in that: The first end of the air pipe connector is detachably connected to the air pipe, and the second end of the air pipe connector is located inside the main body and is detachably connected to the gas nozzle.

8. The pipe assembly welding fixture according to claim 1 or 7, characterized in that: The main body is configured to be cylindrical, and a plurality of trachea connectors are disposed circumferentially around the main body, and the plurality of trachea connectors are symmetrically distributed relative to the spot welding openings.

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