阅读说明：本技术 一种管道焊接连接用夹具及使用方法 (Clamp for pipeline welding connection and use method ) 是由 张尧 刘文华 赵秀君 李姝� 王明伟 张文超 于 2021-09-15 设计创作，主要内容包括：本发明涉及一种管道焊接连接用夹具及使用方法,其装置包括支架A、调心杆、大齿轮、螺栓、焊枪、连接板、支架B、铰力机构、小齿轮和传动机构。其有益效果是：该发明装置采用三爪定心原理和铰力机构实现两个大口径管道的对接焊口的径向微调和轴向微调,利用齿轮传动带动焊枪绕管道旋转代替手工实现管道连接的自动焊接,可解决大口径管道焊接连接的焊口对接难、焊接质量不高问题,结构简单,操作方便,易于实现,降低了工人劳动强度,克服了人为因素的影响,提高了施工质量,提高了施工效率,特别适用于小批量管道工程施工,尤其是适用于管道损坏后的临时抢修工程施工。(The invention relates to a clamp for welding and connecting pipelines and a using method thereof. The beneficial effects are as follows: the device disclosed by the invention realizes radial micro-adjustment and axial micro-adjustment of butt-joint welded junctions of two large-diameter pipelines by adopting a three-jaw centering principle and a hinge mechanism, utilizes gear transmission to drive a welding gun to rotate around the pipelines instead of manual operation to realize automatic welding of pipeline connection, can solve the problems of difficult butt joint and low welding quality of the welded junctions of the large-diameter pipelines, has the advantages of simple structure, convenience in operation and easiness in realization, reduces the labor intensity of workers, overcomes the influence of human factors, improves the construction quality, improves the construction efficiency, is particularly suitable for small-batch pipeline engineering construction, and is particularly suitable for temporary rush-repair engineering construction after the pipelines are damaged.)

1. A clamp for welding and connecting pipelines comprises a support A, an adjusting rod, a large gear, a bolt, a welding gun, a connecting plate, a support B, a hinge mechanism, a small gear and a transmission mechanism, and is characterized in that the support A is sleeved on a main pipe and is fixedly connected with the main pipe through three adjusting rods uniformly arranged on the support A; the bull gear is sleeved on the support A and is in sliding connection with the support A; one end of the connecting plate is fixedly connected with the large gear through a bolt, and the other end of the connecting plate is fixedly provided with a welding gun; the bracket B is sleeved on the sub-pipe and is fixedly connected with the sub-pipe through three centering rods uniformly arranged on the bracket B; the two hinging mechanisms are symmetrically arranged, one end of each hinging mechanism is fixedly connected with the support A, the other end of each hinging mechanism is fixedly connected with the support B, and the axial lead of the connected hinging mechanisms is parallel to the central lines of the sub pipe and the main pipe; the transmission mechanism is connected with the small gear, and the small gear is meshed with the large gear.

2. The clamp for welding and connecting the pipelines as claimed in claim 1, wherein the bracket a is provided with bosses which are in sliding fit with the bull gear, and the number of the bosses is designed according to the diameter of the connected pipeline and is an integral multiple of 3, namely 3, 6 and 9 … ….

3. The clamp for welding and connecting the pipelines according to claim 1, wherein the aligning rod is of a full-thread structure, the end part of the aligning rod is hinged with a cushion block, and the cushion block is provided with anti-skid and wear-resistant materials.

4. The clamp for welding and connecting the pipeline according to claim 1, wherein the support A and the support B are respectively and uniformly provided with connecting threads matched with the aligning rod.

5. The clamp for welding and connecting the pipelines as claimed in claim 1, wherein the transmission mechanism comprises a motor direct-connected reducer and a support, wherein the motor direct-connected reducer is connected with the pinion, and the support is fixedly connected with the bracket A or the ground.

6. The clamp for welding connection of pipelines according to claim 1, wherein the support A, the support B and the gearwheel are of two half-structure design and are fixedly connected together by bolts.

7. The fixture for pipe welding according to claim 1, wherein the welding gun is selected from an automatic submerged arc welding gun, an automatic argon arc welding gun, or other gas-shielded automatic welding guns.

8. The use method of the clamp for welding and connecting the pipelines, which is used for realizing the method, is characterized by comprising the following steps:

1) sleeving the support A on the main pipe, and connecting and fixing the support A through three aligning rods;

2) in a similar way, the bracket B is sleeved on the sub-pipe, three adjusting rods are arranged on the sub-pipe but not locked, and the two hinge force mechanisms are connected and fixed with the bracket A and the bracket B;

3) and (3) radial fine adjustment: the three adjusting rods on the bracket B are respectively adjusted to realize the radial micro movement of the sub-pipe, so that the axial lead of the hinge mechanism is parallel to the central lines of the sub-pipe and the main pipe, and the three adjusting rods are locked to connect and fasten the bracket B and the sub-pipe;

4) axial fine adjustment: simultaneously adjusting the two hinge force mechanisms to realize the micro movement of the sub-pipe in the axial direction;

5) sleeving the bull gear on the support A, fixing the connecting plate on the bull gear by using a bolt, and fixing the welding gun on the other end of the connecting plate;

6) the transmission mechanism is fixed on the support A or the ground and connected with the small gear, and drives the small gear to be meshed with the large gear to rotate so as to drive the welding gun to rotate around the support A to realize automatic welding of pipeline connection.

Technical Field

The invention relates to the technical field of pipeline connection, in particular to a clamp for pipeline welding connection and a using method.

Background

The pipeline is used for conveying liquid and gas media, and is a common infrastructure in industrial and agricultural production and people's life. There are many methods for connecting pipes, but two key points are that the connection is firm/reliable, and the connection is sealed. Undoubtedly, a welded connection is one of the best implementations to meet these two key points. For media needing long-distance and large-caliber pipeline transportation, such as petroleum, natural gas, drinking water and the like, the welding connection has greater superiority. At present, the existing long-distance and large-caliber pipeline welding connection technology mainly has the following defects:

1) most of pipeline projects such as petroleum, natural gas, drinking water and the like are field construction, the construction site is constantly changed, and the working environment factors and the like have a plurality of influences, so that the traditional manual electric arc welding method is mostly adopted in the existing pipeline welding method, the efficiency is low, the quality is unstable, and the requirement on the operation skill of workers is high;

2) because large-diameter pipelines are heavy and have high butt joint difficulty, radial and axial micro adjustment required by butt joint weld joints is particularly met, manual operation is mostly used, the labor intensity is high, and the centering quality is not high;

3) the influence of human factors is large, the construction quality is not high, and the construction efficiency is low;

4) professional complete equipment can solve the problems, but the manufacturing cost is too high, the construction cost is high, and for small-batch pipeline projects, particularly temporary repair projects after pipelines are damaged, the professional complete equipment cannot be used for repayment, and the fact that the construction is not done.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention solves the technical problem of providing a clamp for welding and connecting pipelines and a using method thereof, the radial and axial fine adjustment of butt welding seams of two large-diameter pipelines is realized by adopting a three-jaw centering principle and a hinging mechanism, the welding gun is driven to rotate around the pipelines by utilizing gear transmission instead of manual operation to realize the automatic welding of pipeline connection, the problems of difficult butt joint and low welding quality of the welding seams of the large-diameter pipeline welding and connection can be solved, the structure is simple, the realization is easy, the labor intensity of workers is reduced, the influence of human factors is overcome, the construction quality is improved, and the construction efficiency is improved.

In order to achieve the purpose, the invention adopts the following technical scheme:

a clamp for welding and connecting pipelines comprises a support A, an adjusting rod, a large gear, a bolt, a welding gun, a connecting plate, a support B, a hinge mechanism, a small gear and a transmission mechanism, and is characterized in that the support A is sleeved on a main pipe and is fixedly connected with the main pipe through three adjusting rods uniformly arranged on the support A; the bull gear is sleeved on the support A and is in sliding connection with the support A; one end of the connecting plate is fixedly connected with the large gear through a bolt, and the other end of the connecting plate is fixedly provided with a welding gun; the bracket B is sleeved on the sub-pipe and is fixedly connected with the sub-pipe through three centering rods uniformly arranged on the bracket B; the two hinging mechanisms are symmetrically arranged, one end of each hinging mechanism is fixedly connected with the support A, the other end of each hinging mechanism is fixedly connected with the support B, and the axial lead of the connected hinging mechanisms is parallel to the central lines of the sub pipe and the main pipe; the transmission mechanism is connected with the small gear, and the small gear is meshed with the large gear.

The bracket A is provided with bosses in sliding fit with the bull gear, and the number of the bosses is designed according to the diameter matching of the connected pipelines and is an integral multiple of 3, namely 3, 6 and 9 … ….

The aligning rod is of a full-thread structure, a cushion block is hinged to the end of the aligning rod, and anti-skidding wear-resistant materials are arranged on the cushion block.

And connecting threads matched with the aligning rods are uniformly distributed on the support A and the support B respectively.

The transmission mechanism consists of a motor direct connection speed reducer and a support, wherein the motor direct connection speed reducer is connected with the pinion, and the support is fixedly connected with the support A or the ground.

The support A, the support B and the large gear are of two half-half structural designs and are fixedly connected together through bolts.

Furthermore, the welding gun can be an automatic submerged arc welding gun, an automatic argon arc welding gun or other gas protection automatic welding guns.

The use method of the clamp for welding and connecting the pipelines comprises the following steps:

1) sleeving the support A on the main pipe, and connecting and fixing the support A through three aligning rods;

2) in a similar way, the bracket B is sleeved on the sub-pipe, three adjusting rods are arranged on the sub-pipe but not locked, and the two hinge force mechanisms are connected and fixed with the bracket A and the bracket B;

3) and (3) radial fine adjustment: the three adjusting rods on the bracket B are respectively adjusted to realize the radial micro movement of the sub-pipe, so that the axial lead of the hinge mechanism is parallel to the central lines of the sub-pipe and the main pipe, and the three adjusting rods are locked to connect and fasten the bracket B and the sub-pipe;

4) axial fine adjustment: simultaneously adjusting the two hinge force mechanisms to realize the micro movement of the sub-pipe in the axial direction;

5) sleeving the bull gear on the support A, fixing the connecting plate on the bull gear by using a bolt, and fixing the welding gun on the other end of the connecting plate;

6) the transmission mechanism is fixed on the support A or the ground and connected with the small gear, and drives the small gear to be meshed with the large gear to rotate so as to drive the welding gun to rotate around the support A to realize automatic welding of pipeline connection.

Compared with the prior art, the invention has the beneficial effects that:

1) according to the invention, by respectively adjusting the three centering rods on the bracket B and utilizing the three-jaw centering principle, the minor movement of the minor tube in the radial direction can be realized, so that the axial lead of the hinge mechanism is parallel to the axial leads of the minor tube and the main tube, and the purpose of minor tube radial fine adjustment is achieved; meanwhile, the two hinge force mechanisms are adjusted together, so that the minor movement of the sub pipe in the axial direction can be realized, the central lines of the sub pipe and the main pipe are coaxial, the problem of difficult butt joint of large-diameter pipelines is solved, the butt joint quality is improved, and the welding preparation time is shortened;

2) according to the invention, the transmission mechanism drives the pinion and the gearwheel to rotate in a meshed manner, so that the welding gun is driven to rotate around the bracket A, namely around the butt welding port of the primary and secondary pipelines, the automatic welding of pipeline connection is realized instead of manual operation, and the welding quality is improved;

3) the bracket A, the bracket B and the gearwheel are in two-half structural design and are fixedly connected together through bolts, so that the mounting and dismounting are convenient and the gearwheel can be repeatedly used;

4) the two hinge force mechanisms are arranged in parallel to the central line of the connected pipeline, so that the connecting and fixing effects of the bracket A and the bracket B are achieved, and the reference and axial distance fine adjustment effects during butt welding of the two connected pipelines are achieved;

5) the invention overcomes the influence of human factors, reduces the labor intensity of workers and improves the construction quality and efficiency;

6) the invention has simple integral structure, convenient operation, easy realization and low construction cost, is particularly suitable for small-batch pipeline engineering construction, and is particularly suitable for temporary rush repair engineering construction after the pipeline is damaged.

Drawings

FIG. 1 is a schematic front view of the structural principle of the present invention;

FIG. 2 is a schematic view of the cross-sectional structure A-A in FIG. 1;

FIG. 3 is a schematic view of the cross-sectional structure B-B in FIG. 1;

FIG. 4 is a schematic front view of the structural principle of the bracket A of the present invention;

fig. 5 is a schematic left side view of the structural principle of the stent a of the present invention.

In the figure: 1-support A101-boss 102-connecting thread 2-aligning rod 201-cushion block 3-bull gear 4-bolt 5-welding gun 6-connecting plate 7-support B8-hinge mechanism 9-pinion 10-transmission mechanism 11-sub-pipe 12-main pipe.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in fig. 1-5, the clamp for welding and connecting pipelines comprises a support a1, a centering rod 2, a bull gear 3, a bolt 4, a welding gun 5, a connecting plate 6, a support B7, a hinge mechanism 8, a pinion 9 and a transmission mechanism 10, wherein the support a1 is sleeved on a mother pipe 12 and is fixedly connected with the mother pipe 12 through three centering rods 2 uniformly arranged on a support a 1; the bull gear 3 is sleeved on the support A1 and is in sliding connection with the support A1; one end of the connecting plate 6 is fixedly connected with the large gear 3 through a bolt 4, and the other end of the connecting plate is fixedly provided with a welding gun 5; the bracket B7 is sleeved on the sub-pipe 11 and is fixedly connected with the sub-pipe 11 through three adjusting rods 2 uniformly arranged on the bracket B7; the two hinging mechanisms 8 are symmetrically arranged, one ends of the hinging mechanisms are respectively and fixedly connected with a bracket A1, the other ends of the hinging mechanisms are respectively and fixedly connected with a bracket B7, and the axial lead of the connected hinging mechanisms 8 is parallel to the central lines of the sub pipe 11 and the main pipe 12; the transmission mechanism 10 is connected with a small gear 9, and the small gear 9 is meshed with the large gear 3.

The support A1 is provided with bosses 101 in sliding fit with the bull gear 3, the number of the bosses 101 is designed according to the diameter matching of the connected pipelines (the sub-pipe 11 and the main pipe 12), and is an integral multiple of 3, namely 3, 6 and 9 … …, so that the contact between the bull gear 3 and the support A1 is point contact, namely point sliding connection, and the friction contact surface is reduced.

The aligning rod 2 is of a full-thread structure, the end part of the aligning rod is hinged with a cushion block 201, and the cushion block 201 is provided with anti-skidding wear-resistant materials to prevent the sub-pipe 11 or the main pipe 12 from being scratched in fastening connection.

And the support A1 and the support B7 are respectively and uniformly provided with connecting threads 102 matched with the aligning rod 2.

The transmission mechanism 10 is composed of a motor direct connection speed reducer and a support, wherein the motor direct connection speed reducer is connected with the pinion 9, and the support is fixedly connected with the support A1 or the ground.

Support A1, support B7 and gear wheel 3 are two half structural design, through bolt fixed connection together, and easy to assemble dismantlement to do benefit to used repeatedly.

The use method of the clamp for welding and connecting the pipelines comprises the following steps:

1) the support A1 is sleeved on the main pipe 12 and is fixedly connected through three adjusting rods 2;

2) similarly, the bracket B7 is sleeved on the sub-pipe 11, three adjusting rods 2 are arranged on the bracket B7 but not locked, and two hinge mechanisms 8 are connected and fixed with the bracket A1 and the bracket B7;

3) and (3) radial fine adjustment: the radial micro movement of the sub-pipe 11 is realized by respectively adjusting the three adjusting rods 2 on the bracket B7, so that the axial lead of the hinge mechanism 8 is parallel to the axial leads of the sub-pipe 11 and the main pipe 12 at the same time, namely the axial leads of the sub-pipe 11 and the main pipe 12 are coaxial, and then the three adjusting rods 2 are locked to connect and fasten the bracket B7 and the sub-pipe 11;

4) axial fine adjustment: the two hinge force mechanisms 8 are adjusted simultaneously to realize the micro movement of the sub-pipe 11 in the axial direction, namely, the butt joint distance between the sub-pipe 11 and the main pipe 12 meets the requirement of butt joint welding openings;

5) sleeving the bull gear 3 on a support A1, fixing the connecting plate 6 on the bull gear 3 by using a bolt 4, and fixing the welding gun 5 on the other end of the connecting plate 6 (adjusting the welding angle of the welding gun 5);

6) the transmission mechanism 10 is fixed on the support A1 or the ground and connected with the pinion 9, the transmission mechanism 10 drives the pinion 9 to be meshed with the gearwheel 3 to rotate, the welding gun 5 is driven to rotate around the support A1, namely around the butt welding openings of the sub pipe 11 and the main pipe 11, the automatic welding of pipeline connection is realized by replacing manual operation, and the welding quality rotation and efficiency are improved.

After welding, the fastening bolts for connecting the two half structures of the bracket A1, the bracket B7 and the bull gear 3 are loosened, and the bracket A1, the bracket B7 and the bull gear 3 can be taken out and moved to the next butt weld crater position or stored for later use.

Further, the welding gun 5 can be an automatic submerged arc welding gun, an automatic argon arc welding gun or other gas protection automatic welding guns.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.