CN110744256A - Clamp for welding U-shaped pipeline and method for welding U-shaped pipeline - Google Patents

Abstract

The invention relates to the technical field of welding fixtures, in particular to a fixture for welding a U-shaped pipeline, which comprises a base, an upright post and a guide rail, wherein the base is fixedly connected to the ground or a workbench; the number of the upright columns is at least two, the upright columns are arranged on the base, and the positions of the upright columns in the length direction of the base are adjusted through the first adjusting assembly; the middle part of the guide rail is rotatably arranged at the front end of the upper part of the upright post, and the guide rail is controlled to rotate or not through a locking mechanism; wherein, the bilateral symmetry of guide rail respectively joint a ferrule, and the ferrule cooperation on two at least stands is used for two straight tubes of fixed U type pipeline. The method for welding the U-shaped pipeline adopts the clamp for welding the U-shaped pipeline for welding. The invention can facilitate the welding and positioning of the U-shaped pipeline, is not easy to shift and deform during welding, has small dimension error of finished products and high precision, is convenient to weld, move and turn over for pipe fittings with slightly larger dimensions, has high welding efficiency, and can be operated by one welder.

Description

Clamp for welding U-shaped pipeline and method for welding U-shaped pipeline

Technical Field

The invention relates to the technical field of welding fixtures, in particular to a fixture for welding a U-shaped pipeline and a method for welding the U-shaped pipeline.

Background

The U-shaped pipeline is used for sewage treatment, the length of the pipeline can be greatly increased in a limited space, the time of mixed reaction of sewage and a medicament is prolonged, and the U-shaped pipeline is used as a modular connecting piece and has high pipe distribution efficiency.

The structural form of the U-shaped pipe is that two straight pipes are welded at two ends of a 180-degree elbow, and a connecting flange is welded at the other end of each straight pipe. At present, the conventional manufacturing method is that an elbow and a straight pipe are placed on a working platform, spot welding is firstly carried out for fixation, and then full welding is carried out, so that the problems exist: 1. lack of fixation and difficult positioning; 2. the welding is easy to shift, so that the size error of the finished product is large; 3. no fixture is used for fixing, welding deformation is large, the size of a finished product is unqualified, and normal installation cannot be realized; 4. the welding, moving and overturning are very inconvenient and the efficiency is low corresponding to the pipe fitting with a slightly larger pipe diameter; 5. for large-diameter and long pipe fittings, one welder cannot finish the welding operation independently.

Disclosure of Invention

The invention aims to solve the problems and the defects, and provides a fixture for welding a U-shaped pipeline and a method for welding the U-shaped pipeline.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a clamp for welding a U-shaped pipeline comprises a base, a stand column and a guide rail, wherein the base is fixedly connected to the ground or a workbench; the number of the upright columns is at least two, the upright columns are arranged on the base, and the positions of the upright columns in the length direction of the base are adjusted through the first adjusting assembly; the middle part of the guide rail is rotatably arranged at the front end of the upper part of the upright post, and the guide rail is controlled to rotate or not through a locking mechanism; the two sides of the guide rail are symmetrically and respectively clamped with a pipe hoop, and the pipe hoops on the at least two upright posts are matched with two straight pipes for fixing the U-shaped pipeline.

Further, the clamp for welding the U-shaped pipeline further comprises a rotation limiting mechanism, and the rotation limiting mechanism can enable the guide rail which rotates to a certain angle to stop rotating.

Further, in foretell anchor clamps for welding U type pipeline, rotatory stop gear is including fixed the guide holder that sets up the stand front end, the guide holder in-connection has elasticity to compress tightly the subassembly, elasticity compresses tightly the up end of subassembly and compresses tightly the middle part bottom surface of guide rail, forms the friction pair, elasticity compress tightly the subassembly with the fitting surface of guide rail is the cambered surface, still be connected with the second regulating assembly on the guide holder, the second regulating assembly is used for adjusting the degree that compresses tightly of elasticity compress tightly the subassembly.

Further, in foretell anchor clamps for welding U type pipeline, elasticity compresses tightly the subassembly and includes elasticity bottom plate, spring and the friction compact heap that from the bottom up connects gradually, elasticity bottom plate slides and sets up in the guide holder.

Further, in the above-mentioned clamp for welding the U-shaped pipeline, a threaded through hole is formed in the bottom of the guide seat, the second adjusting component is an adjusting bolt screwed in the threaded through hole, and the upper end of the adjusting bolt abuts against the lower end of the elastic bottom plate.

Further, in the above-mentioned clamp for welding the U-shaped pipeline, the friction pressing block is an inverted T-shaped friction wood block.

Further, in foretell anchor clamps for welding U type pipeline, the middle part of guide rail sets up to the cylinder sleeve, the cylinder sleeve rotates the cover and establishes the round pin epaxial at stand upper portion front end, the cylinder sleeve with the round pin axle is connected through fastening bolt in the axial direction, locking mechanism includes the locking round pin, the round pin axle with all be equipped with the bolt hole on the sleeve, the locking round pin inserts simultaneously the round pin axle with can prevent during the bolt hole on the sleeve the guide rail is rotatory.

Further, in the above-mentioned clamp for welding the U-shaped pipeline, the base is an i-beam, and the lower flange plates on both sides of the i-beam are fixed on the ground or on the workbench through angle steels vertically connected with the i-beam.

Further, in foretell anchor clamps that are used for welding U type pipeline, first adjusting part includes the sliding sleeve, the cross section of sliding sleeve sets up to the C shaped steel shape with I-steel upper portion complex, be connected with adjusting screw on the terminal surface under the both sides of sliding sleeve, adjusting screw supports on the upper portion flange board of I-steel.

A method for welding U-shaped pipelines by using any one of the clamps for welding U-shaped pipelines comprises the following steps:

firstly, fixing a base, and fixing a guide rail by inserting a locking pin;

opening a pipe hoop on the guide rail, putting the left and right steel pipes into the guide rail, adjusting the size of the steel pipes in the length direction, pre-tightening the pipe hoop, adjusting the center distance between two ends of the two steel pipes, and fastening the pipe hoop;

thirdly, aligning the handheld U-shaped elbow to the two steel pipes, and performing spot welding;

fourthly, the locking pin is taken off, and the U-shaped pipeline can be rotated randomly at the moment and welded;

fifthly, welding flanges at two end parts of the U-shaped pipeline to form the same U-shaped elbow;

and sixthly, inserting a locking pin, loosening the pipe hoop and taking down the finished U-shaped pipeline.

The clamp for welding the U-shaped pipeline and the method for welding the U-shaped pipeline have the advantages that:

1. according to the clamp for welding the U-shaped pipeline, the two straight pipes of the U-shaped pipeline can be fixed through the matching of the pipe hoops on the at least two stand columns, so that the positioning is convenient to realize, the displacement and the deformation are not easy to occur during the welding, the size error of a finished product is small, the precision is high, the movement and the overturning are easy for a pipe fitting with a slightly larger size, the welding is convenient, the welding efficiency is high, and one welder can finish the operation;

2. the clamp for welding the U-shaped pipeline further comprises the rotation limiting mechanism, the rotation limiting mechanism can enable the guide rail which rotates to a certain angle to stop rotating, the U-shaped pipeline can be conveniently fixed and then welded after rotating to the certain angle, and the welding is convenient and efficient;

3. in the clamp for welding the U-shaped pipeline, the rotary limiting mechanism comprises an elastic pressing component, the upper end surface of the elastic pressing component is used for pressing the bottom surface of the middle part of the guide rail, so that the guide rail can rotate only when external force is applied, and can be kept still after rotating to any angle, the matching surface of the elastic pressing component and the guide rail is an arc surface, so that the guide rail can be always pressed by the elastic pressing component within a certain rotation angle, and the pressing degree of the elastic pressing component can be conveniently adjusted according to the situation through the second adjusting component;

4. in the clamp for welding the U-shaped pipeline, the lower flange plates on two sides of the I-shaped steel are fixed on the ground or a workbench through the angle steel vertically connected with the I-shaped steel, so that the I-shaped steel can be prevented from being easily overturned due to too narrow width of the bottom surface;

5. the invention provides a method for welding a U-shaped pipeline, which is convenient, has the advantages of convenient welding positioning, difficult dislocation and deformation during welding, small size error of a finished product, high precision, easy movement and turnover for a pipe fitting with a slightly larger size, convenient welding and high welding efficiency, and can be operated by one welder.

Drawings

Fig. 1 is a schematic structural diagram of a clamp for welding U-shaped pipelines according to an embodiment of the present invention.

Fig. 2 is a schematic view of a disassembled structure of the upright post and the parts connected thereon according to the embodiment of the invention.

Fig. 3 is a schematic structural diagram of a U-shaped pipeline according to an embodiment of the invention.

Fig. 4 is a schematic structural view of a pipe clamp according to an embodiment of the present invention.

In the figure: the device comprises angle steel 1, a base 2, an adjusting screw 3, a stand column 4, a guide rail 5, a pipe hoop 6, a locking pin 7, a fastening bolt 8, an adjusting bolt 9, an elastic bottom plate 10, a spring 11, an inverted T-shaped friction wood block 12, a sliding sleeve 13, a guide seat 14, a cylindrical sleeve 15, a pin shaft 16, a bolt hole 17 and a U-shaped pipeline 18.

Detailed Description

A clamp for welding U-shaped pipelines and a method for welding U-shaped pipelines according to the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1 to 4, in the present embodiment, a clamp for welding a U-shaped pipeline is disclosed, which includes a base, an upright, and a guide rail, and in the present embodiment, preferably, the base is an i-beam, and lower flange plates at two sides of the i-beam are fixed on the ground or a workbench through an angle steel vertically connected to the i-beam, so that the i-beam can be prevented from easily toppling due to too narrow width of a bottom surface; the number of the stand columns is at least two, in the embodiment, the number of the stand columns is two, the stand columns are arranged on the base, and the positions of the stand columns in the length direction of the base are adjusted through the first adjusting assembly; the middle part of the guide rail is rotatably arranged at the front end of the upper part of the upright post, and the guide rail is controlled to rotate or not through a locking mechanism; the two sides of the guide rail are symmetrically and respectively clamped with a pipe hoop, the clamping groove end of the pipe hoop is clamped in the guide rail, a fastener at the rotary fastening end can clamp a steel pipe, the pipe hoop is arranged in front of the steel pipe, the clamping groove end of the pipe hoop can move left and right on the guide rail, after the pipe hoop clamps the steel pipe, if the steel pipe is continuously fastened, the two sides of the clamping groove end of the pipe hoop tilt upwards and outwards, the clamping groove end of the pipe hoop can be clamped with the guide rail, the positioning effect is achieved, the pipe hoops on the same guide rail are symmetrically arranged, two straight pipes of a U-shaped pipeline are vertical relative to the middle part of the guide rail, the guide rail can be symmetrically rotated during welding, the welding is convenient, the pipe hoops on the two stand columns are matched with the two straight pipes for fixing the U; the fixture for welding the U-shaped pipeline of the embodiment is convenient to position, is not easy to shift and deform during welding, has small size error of a finished product and high precision, is easy to move and turn over a pipe fitting with a slightly larger size, is convenient to weld, is high in welding efficiency, and can be operated by one welder.

In other embodiments, the guide rail can be additionally provided with a limiting block for limiting the position of the pipe clamp, so that the pipe clamp can be quickly positioned.

In this embodiment, preferably, the above-mentioned clamp for welding a U-shaped pipeline further includes a rotation limiting mechanism, and the rotation limiting mechanism can stop rotating the guide rail rotated to a certain angle, and can conveniently rotate the U-shaped pipeline to a certain angle and then fix the U-shaped pipeline for welding, so that the welding is convenient and efficient.

In this embodiment, preferably, rotatory stop gear is including the fixed guide holder that sets up at the stand front end, the guide holder sets up to the recess form, it compresses tightly the subassembly to connect elasticity in the guide holder, elasticity compresses tightly the middle part bottom surface of subassembly's up end pressure guide rail, form the friction pair, make the guide rail just can rotate when applying external force, and can keep motionless after rotating arbitrary angle, the fitting surface that elasticity compressed tightly subassembly and guide rail is the cambered surface, make the guide rail can be compressed tightly by the elasticity compressing tightly subassembly all the time in certain rotation angle, still be connected with the second adjusting part on the guide holder, the second adjusting part is used for adjusting the degree that compresses tightly of elasticity compressing tightly the subassembly.

In this embodiment, preferably, the elastic pressing assembly includes an elastic bottom plate, a spring and a friction pressing block which are connected in sequence from bottom to top, the elastic bottom plate is slidably arranged in the guide seat, and the elastic bottom plate and the friction pressing block are both convenient to connect with the spring and support the spring.

In this embodiment, preferably, the bottom of guide holder is equipped with the screw thread through-hole, and the second adjusting part is the adjusting bolt of spiro union in the screw thread through-hole, and the upper end of adjusting bolt supports at elasticity bottom plate lower extreme. The friction force of the elastic pressing assembly and the bottom surface of the middle of the guide rail is realized by adjusting the length of the spring through the adjusting bolt, when the guide rail rotates to a certain angle and cannot be kept, only the adjusting bolt pressing spring is needed to be adjusted, and the friction force is increased.

In this embodiment, preferably, the friction compact heap is the friction wood piece of falling T shape, and the middle part bottom surface of T shape friction wood piece and guide rail forms the friction pair, makes the guide rail just can rotate when applying external force to can remain motionless after rotating arbitrary angle, sets up the friction compact heap into the wood piece in addition, and wood piece light in weight is convenient for spring-supported, and wood piece roughness is big, and frictional force is big.

In this embodiment, preferably, the middle portion of the guide rail is provided with a cylindrical sleeve, the cylindrical sleeve is rotatably sleeved on a pin shaft at the front end of the upper portion of the stand column, the cylindrical sleeve and the pin shaft are fixedly connected through a fastening bolt and a matched gasket in the axial direction, the guide rail can freely rotate around the pin shaft on the stand column, the locking mechanism comprises a locking pin, pin shafts and sleeves are respectively provided with a pin hole, the locking pin can prevent the guide rail from rotating when being inserted into the pin shaft and the pin hole on the sleeve simultaneously, and the locking pin can be used for limiting the guide rail from rotating when a workpiece is clamped and disassembled.

The clamp for welding the U-shaped pipeline is also suitable for the process of assembling the U-shaped pipeline by round pipes made of materials such as U-PVC, PP and the like.

The embodiment also discloses a method for welding the U-shaped pipeline, which adopts the clamp for welding the U-shaped pipeline for welding to perform welding, and specifically comprises the following steps:

firstly, connecting angle steel with an I-shaped steel base, fixing the angle steel on the bottom surface or a workbench through bolts, fixing the base well, and inserting a locking pin to fix a guide rail;

opening pipe hoops on two sides of the front guide rail and the rear guide rail, placing the left steel pipe and the right steel pipe, adjusting the size of the steel pipes in the length direction, pre-tightening the pipe hoops, adjusting the center distance between two ends of the two steel pipes, and fastening the pipe hoops;

thirdly, aligning the handheld U-shaped elbow to the two steel pipes, and performing spot welding;

fourthly, the locking pin is taken off, the U-shaped pipeline can be rotated to a certain angle at will and welded, and the U-shaped pipeline can be fixed after being rotated to a certain angle due to the action of the rotary limiting mechanism;

fifthly, welding flanges at two end parts of the U-shaped pipeline and welding U-shaped elbows, wherein the flanges at the end parts of the U-shaped pipeline can also be other connecting pieces such as hoops, overlocks and the like;

and sixthly, after welding is finished, inserting a locking pin, loosening the pipe hoop and taking down the finished U-shaped pipeline.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

Exemplary embodiments of the present invention have been described in detail with reference to the preferred embodiments, however, it will be understood by those skilled in the art that various changes and modifications may be made to the specific embodiments described above, and various combinations of the technical features and structures proposed by the present invention may be made without departing from the concept of the present invention.

Claims (10)

1. A clamp for welding U-shaped pipes, comprising:

the base is fixedly connected to the ground or a workbench;

the number of the upright columns is at least two, the upright columns are arranged on the base, and the positions of the upright columns in the length direction of the base are adjusted through the first adjusting assembly; and

the middle part of the guide rail is rotatably arranged at the front end of the upper part of the upright post, and the guide rail is controlled to rotate or not through a locking mechanism;

the two sides of the guide rail are symmetrically and respectively clamped with a pipe hoop, and the pipe hoops on the at least two upright posts are matched with two straight pipes for fixing the U-shaped pipeline.

2. The clamp for welding U-shaped pipes according to claim 1, further comprising a rotation-limiting mechanism capable of stopping the rotation of the guide rail rotated to a certain angle.

3. The clamp for welding the U-shaped pipeline according to claim 2, wherein the rotary limiting mechanism comprises a guide seat fixedly arranged at the front end of the upright post, an elastic pressing assembly is connected in the guide seat, the upper end face of the elastic pressing assembly presses the bottom surface of the middle part of the guide rail to form a friction pair, the matching surface of the elastic pressing assembly and the guide rail is an arc surface, and a second adjusting assembly is further connected to the guide seat and used for adjusting the pressing degree of the elastic pressing assembly.

4. The clamp for welding the U-shaped pipeline according to claim 3, wherein the elastic pressing assembly comprises an elastic bottom plate, a spring and a friction pressing block which are sequentially connected from bottom to top, and the elastic bottom plate is slidably arranged in the guide seat.

5. The clamp for welding the U-shaped pipeline according to claim 4, wherein a threaded through hole is formed in the bottom of the guide seat, the second adjusting assembly is an adjusting bolt screwed in the threaded through hole, and the upper end of the adjusting bolt abuts against the lower end of the elastic bottom plate.

6. The clamp for welding U-shaped pipes according to claim 4, wherein the friction compression block is an inverted T-shaped friction wood block.

7. The clamp for welding the U-shaped pipeline according to claim 1, wherein a cylindrical sleeve is arranged in the middle of the guide rail, the cylindrical sleeve is rotatably sleeved on a pin shaft at the front end of the upper portion of the upright post, the cylindrical sleeve is connected with the pin shaft in the axial direction through a fastening bolt, the locking mechanism comprises a locking pin, pin shafts and sleeves are respectively provided with a pin hole, and the locking pin can prevent the guide rail from rotating when being inserted into the pin shafts and the pin holes in the sleeves.

8. The clamp for welding the U-shaped pipeline according to claim 1, wherein the base is an I-shaped steel, and the lower flange plates on two sides of the I-shaped steel are fixed on the ground or a workbench through angle steel vertically connected with the I-shaped steel.

9. The clamp for welding the U-shaped pipeline according to claim 8, wherein the first adjusting component comprises a sliding sleeve, the cross section of the sliding sleeve is arranged to be in a C-shaped shape matched with the upper part of the I-shaped steel, and adjusting screws are connected to the lower end faces of two sides of the sliding sleeve and abut against the flange plate of the upper part of the I-shaped steel.

10. A method for welding U-shaped pipes, characterized in that the welding is performed by using the jig for welding U-shaped pipes according to any one of claims 1 to 9, comprising the steps of:

firstly, fixing a base, and fixing a guide rail by inserting a locking pin;

opening a pipe hoop on the guide rail, putting the left and right steel pipes into the guide rail, adjusting the size of the steel pipes in the length direction, pre-tightening the pipe hoop, adjusting the center distance between two ends of the two steel pipes, and fastening the pipe hoop;

thirdly, aligning the handheld U-shaped elbow to the two steel pipes, and performing spot welding;

fourthly, the locking pin is taken off, and the U-shaped pipeline can be rotated randomly at the moment and welded;

fifthly, welding flanges at two end parts of the U-shaped pipeline to form the same U-shaped elbow;

and sixthly, inserting a locking pin, loosening the pipe hoop and taking down the finished U-shaped pipeline.

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