CN221910574U - A positioning device for pipe butt welding - Google Patents

Abstract

A positioning device for pipe butt welding comprises a pipe supporting part for supporting a first pipe and a pipe clamping part for clamping a second pipe, the pipe clamping part can adjust the position of the second pipe to be directly opposite to the first positioning pipe, and a limiting member is further arranged between the pipe supporting part and the pipe clamping part, the end of the limiting member extending to the middle of the two positioning pipes when the limiting member is in a vertical state, and can be adjusted according to the on-site conditions, and the limiting member can be a rod-shaped structure. The positioning device for pipe butt welding is simple to operate and has high matching accuracy, can form standardized construction, reduce pipe butt installation time and labor costs, reduce safety hazards, and improve work efficiency.

Description

A positioning device for pipe butt welding

Technical Field

The utility model relates to the field of pipeline installation and maintenance, in particular to a positioning device suitable for pipeline butt welding.

Background Art

When installing or overhauling various types of pipelines such as oil, gas, and water in power plants and chemical plants, pipe butt welding is usually required. Due to the long layout of the formed pipeline, the butt welding of the pipeline is affected by factors such as gravity and the centripetal force of the pipeline. The butt welding operation is complicated, time-consuming, and the accuracy is difficult to guarantee. Once the butt welding is not accurate, the welded pipeline is prone to deformation, wrinkles, cracks, etc., which seriously affects the quality of pipeline butt welding and brings safety hazards.

Utility Model Content

The utility model aims to provide a positioning device for pipe butt welding which has the advantages of simple operation and high butt precision.

The positioning device for pipe butt welding described in the utility model comprises a pipe supporting part for supporting a first pipe and a pipe clamping part composed of an upper part and a lower part for clamping a second pipe from upper and lower sides. The upper and lower parts of the pipe clamping part are provided with pipe clamping devices for clamping and adjusting the position of the second pipe from both sides. A guide rail is further provided between the pipe supporting part and the pipe clamping part. A limiting member is swingably mounted on the guide rail. When the limiting member is swung to the bottom, its bottom end is located between the two pipes.

The positioning device for pipe butt welding of the utility model, when performing the pipe butt welding positioning operation, uses the pipe supporting part to drag the first pipe, places the second pipe in the pipe clamping part, and then moves the limiting piece along the guide rail so that one side of the bottom end of the limiting piece abuts against the second pipe, then pushes the first pipe to move the first pipe toward the second pipe, clamps the bottom end of the limiting piece between the two pipes, and adjusts the clamping part so that the second pipe is directly opposite to the first pipe, and then, in the position where the pipe section avoids the limiting piece, after spot welding positioning below and/or on both sides, the limiting piece is swung out, and then spot welding positioning is performed on the upper side, so that the positioning and fixing operation of the butt welding of the two pipes can be completed. The operation is simple, and the accuracy of each positioning can be very conveniently guaranteed through the restriction of the clamping limiting piece between the two pipes, thereby ensuring the stability of the pipe welding quality and realizing the standardization of the butt gap.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a positioning device for pipe butt welding.

FIG. 2 is a schematic diagram of another embodiment of FIG. 1 .

FIG. 3 is a schematic diagram of another embodiment of FIG. 1 .

Implementation

The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

If there are descriptions involving "first" or "second" in the embodiments of the utility model, the descriptions of "first" or "second" are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

A positioning device for pipe butt welding comprises a pipe supporting portion 1 for supporting a first pipe and a pipe clamping portion 3 composed of an upper portion and a lower portion for clamping a second pipe from upper and lower sides, wherein the upper and lower portions of the pipe clamping portion are provided with pipe clamping devices for clamping and adjusting the position of the second pipe from both sides, and a guide rail 4 is further provided between the pipe supporting portion 1 and the pipe clamping portion 3, a limiting member 2 is swingably mounted on the guide rail 4, and when the limiting member is swung to the bottom, its bottom end is located between the two pipes.

The upper and lower parts of the pipe clamping part can be connected to the pipe supporting part as a whole through the transition part, as shown in FIG1, or can be directly connected through the guide rail 4, as shown in FIG2. The pipe clamping device can be a clamping bolt that is respectively screwed on the upper and lower parts of the pipe clamping part 3 to clamp the second pipe from both sides. During the pipe butt welding alignment operation, the first pipe is dragged by the pipe supporting part 1, the second pipe is placed between the upper and lower parts of the pipe clamping part 3, the clamping bolts of the upper and lower parts are rotated to clamp the second pipe, and the position of the second pipe is adjusted by adjusting the rotation position of the two clamping bolts to align it with the first pipe; then the stopper 2 is moved along the guide rail 4 so that one side of the bottom end of the stopper is against the second pipe, and then the first pipe is pushed to move the first pipe toward the second pipe, and the bottom end of the stopper is clamped between the two pipes. At this time, the positions of the two pipes are close. According to the alignment situation, the clamping bolts can be adjusted again to achieve accurate alignment of the second pipe with the first pipe. Then the first pipe and the second pipe are spot welded and positioned, and then the stopper 2 is swung out, and then the spot welding positioning on the upper side is performed, and the alignment and fixing operation of the butt welding of the two pipes can be completed. The operation is simple, and through the limitation of the clamping stopper between the two pipes, the accuracy of each alignment can be very conveniently guaranteed, thereby ensuring the stability of the pipe welding quality and realizing the standardization of the butt gap. When welding at the butt joint of the two aligned pipes, symmetrical spot welding is generally used to achieve spot welding connection and relative fixation of the two pipes, and then the stopper is removed, and the butt joint of the two pipes is welded by electric welding.

A rubber pad 30 may be provided on the end surface of the bottom of the clamping bolt for clamping the second pipe, so as to better clamp the pipe and prevent damage to the pipe surface.

A threaded section can be set on the guide rail 4, and the limiter 2 can be mounted thereon through a matching thread, which can ensure the horizontal movement of the limiter and enable the limiter to directly rotate to a specific angle when swinging without automatically swinging down. After the initial electric welding positioning, it can easily give way to better perform the pipe welding operation.

The guide rail 4 is preferably a composite structure of a polished rod and a threaded section, that is, it is a threaded section near the pipe welding position, and a polished rod section far from the pipe welding position. When aligning, when far from the pipe welding position, the first pipe can directly push the stopper to move quickly along the polished rod section. When it moves to the pipe welding position, the stopper 2 is rotated to rotate the positioning rod forward along the guide rail threaded section to approach the second pipe, and at the same time, the position of the second pipe can be adaptively adjusted by the clamping bolt to match, so as to achieve the fit between the positioning rod and the second pipe, so that the stopper 2 is clamped between the first pipe and the second pipe, and the alignment of the pipe welding is achieved.

Two upper and lower guide rails 4 can be arranged between the pipe supporting part 1 and the pipe clamping part 3, and each guide rail is provided with a limiting member 2, so as to realize the positioning restriction of the two pipes from both sides at the same time, so as to better ensure the positioning accuracy.

The stopper 2 has a rod-shaped structure with uniform thickness on both sides. The uniform rod-shaped structure is used as a reference to facilitate the application to the pipe requirements of the same model of pipes.

Because the butt welding of pipes of different sizes requires different butt joint gaps, the larger the pipe diameter, the larger the butt welding gap requirement. In order to meet the butt welding alignment requirements of pipes of different diameters, the stopper 2 can also adopt a rod-shaped structure that gradually tapers from the end close to the guide rail 4 to the end away from the guide rail, so as to meet the butt welding requirements of pipes of different models at the same time. The size can also be marked on the stopper 2, which is not only more intuitive, but also allows direct observation of the pipe spacing gap, which is more convenient for accurate alignment.

As shown in FIG3 , the stopper 2 can also be a split structure, including a base rod 21 mounted on the guide rail, a thread is set at the bottom of the base rod, and a positioning block 22 is screwed on the base rod through the thread. When different alignment gaps are required for pipes of different sizes, the positioning block of the corresponding size can be screwed on the base rod.

The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly/indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims (9)

1. A positioning device for pipe butt welding, characterized in that it comprises a pipe supporting portion (1) for supporting a first pipe and a pipe clamping portion (3) composed of an upper portion and a lower portion for clamping a second pipe from upper and lower sides, wherein the upper and lower portions of the pipe clamping portion are provided with pipe clamping devices for clamping and adjusting the position of the second pipe from both sides, and a guide rail (4) is further provided between the pipe supporting portion (1) and the pipe clamping portion (3), and a stopper (2) is swingably mounted on the guide rail (4), and when the stopper is swung to the bottom, its bottom end is located between the two pipes. 2. The positioning device for pipe butt welding according to claim 1 is characterized in that: a threaded section is provided on the guide rail (4), and the limiting member (2) is sleeved thereon through a matching thread. 3. The positioning device for pipe butt welding according to claim 1 is characterized in that the guide rail (4) is a composite structure of a polished rod and a threaded section, wherein the section near the pipe butt welding position is a threaded section, and the section away from the pipe butt welding position is a polished rod section. 4. The positioning device for pipe butt welding according to claim 1, characterized in that the limiting member (2) is a rod-shaped structure with uniform thickness. 5. The positioning device for pipe butt welding according to claim 1, characterized in that: the limiting member (2) is a rod-shaped structure that gradually becomes thinner from one end close to the guide rail to one end away from the guide rail. 6. The positioning device for pipe butt welding according to claim 1, characterized in that: a dimension mark is provided on the limiting member (2). 7. The positioning device for pipe butt welding according to claim 1 is characterized in that the limiting member (2) is a split structure, comprising a base rod (21) sleeved on the guide rail (4) and having a threaded bottom, and a positioning block (22) screwed onto the base rod through matching threads. 8. The alignment device for pipe butt welding according to claim 1, characterized in that a rubber pad (30) is provided on the end surface of the pipe clamping portion (3) for clamping the second pipe. 9. The positioning device for pipe butt welding according to any one of claims 1 to 8, characterized in that: two upper and lower guide rails (4) are arranged between the pipe supporting part (1) and the pipe clamping part (3), and limiting members (2) are installed on both guide rails.