CN112756855A

CN112756855A - Method for welding and connecting two pipe fittings by adopting pipe fitting welding device

Info

Publication number: CN112756855A
Application number: CN202011557669.2A
Authority: CN
Inventors: 白宇慧; 张说; 柳显宾
Original assignee: Yantai Wanhua Electronic Material Co ltd
Current assignee: Yantai Wanhua Electronic Material Co ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-05-07
Anticipated expiration: 2040-12-23
Also published as: CN112756855B

Abstract

The invention discloses a method for welding and connecting two pipe fittings by adopting a pipe fitting welding device, which comprises the following steps: s1: selecting two pipe fittings to be welded; s2: cleaning two pipe fittings to be welded; s3: selecting proper two pairs of pipe fitting clamping blocks and installing the two pairs of pipe fitting clamping blocks in place; s4: lifting the lifting seat, and placing the two pipe fittings at the designated positions; s5: adjusting the two pipe fittings to align the pipe orifices of the two pipe fittings; s6: descending the lifting seat to enable two pipe fitting clamping blocks in each pipe fitting clamp to be in butt joint; s7: and welding the pipe orifice joint of the two pipe fittings by adopting a welding handle until the welding is finished. The method for welding and connecting the two pipe fittings by adopting the pipe fitting welding device can realize the functions of butt joint and lap joint aiming at the pipe fittings with different sizes, simultaneously solves the problems of accurate butt joint positioning and size and shape constraint of small-size pipe fittings, is simple to operate, and improves the welding quality.

Description

Method for welding and connecting two pipe fittings by adopting pipe fitting welding device

Technical Field

The invention relates to the technical field of metal pipe welding, in particular to a method for welding and connecting two pipe fittings by using a pipe fitting welding device.

Background

In some fields, small metal tubes with small radii are often used. The metal small pipe can be used as a sheath, a conductor and a connecting piece.

Due to the small radius of the metal small tubes, when connecting two metal small tubes, the metal small tubes need to be accurately positioned.

In the prior art, some clamps are used for clamping the metal small pipe, the positioning is inaccurate, and the metal small pipe is easily damaged. In the prior art, the technical small pipes are difficult to position, and if the operation is wrong, the connection quality of the two small metal pipes can be directly influenced, for example, the welding is not firm, the welding has deviation, and the like.

In view of the above, it is necessary to provide a method capable of improving the welding quality of a small metal pipe.

Disclosure of Invention

The invention aims to provide a method for welding and connecting two pipe fittings by adopting a pipe fitting welding device, which can accurately position the two pipe fittings and has high welding quality.

The technical scheme of the invention provides a method for welding and connecting two pipes by adopting a pipe welding device, wherein the pipe welding device comprises a base, a lifting seat, two pipe clamps and a welding handle;

the pipe fitting clamp comprises two pipe fitting clamping blocks which are arranged up and down, and each pipe fitting clamping block is provided with a semicircular clamping groove for clamping a pipe fitting;

the method comprises the following steps:

s1: selecting two pipe fittings to be welded, and pretreating pipe orifices of the two pipe fittings;

s2: cleaning two pipes to be welded;

s3: selecting proper two pairs of pipe fitting clamping blocks, and installing the two pairs of pipe fitting clamping blocks in place on the base and the lifting seat;

s4: lifting the lifting seat, and respectively placing the two pipe fittings in the semicircular clamping grooves of the two pipe fitting clamping blocks on the base;

s5: adjusting the two pipes to align the pipe orifices of the two pipes;

s6: descending the lifting seat to enable the two pipe fitting clamping blocks in each pipe fitting clamp to be in butt joint, and enabling the semicircular clamping grooves of the two pipe fitting clamping blocks to be in butt joint to clamp the pipe fitting;

s7: and welding the pipe orifice joint of the two pipe fittings by adopting the welding handle until the welding is finished.

In one optional technical solution, step S1 includes: and grinding and polishing the pipe orifice of each pipe fitting until the section of the pipe orifice is a plane.

In one optional technical solution, step S2 includes: and cleaning the interior of each pipe fitting by using an ultrasonic cleaner.

In one optional technical solution, step S2 includes: and cleaning oil stains and impurities within the range of 20mm from the pipe orifice of each pipe fitting.

In one optional technical solution, step S2 includes: the inside and outside of each of the pipes was purged with nitrogen.

In one optional technical scheme, the time for blowing the nitrogen is more than 20S.

In one optional technical solution, step S5 includes: when the pipe orifices of the two pipe fittings are aligned, the joint of the pipe orifices is less than 0.1 mm.

In one optional technical scheme, the base comprises two bosses which are arranged at intervals, the lifting seat is provided with two pressing blocks which are arranged at intervals, and each pressing block is positioned above one boss;

step S3 includes: detachably mounting one pipe fitting clamping block in each pipe fitting clamp on the top surface of the boss, and detachably mounting the other pipe fitting clamping block on the bottom surface of the pressing block;

step S7 includes: and positioning the welding handle on the two pressing blocks, and inserting a welding head of the welding handle downwards between the two pressing blocks to be aligned with the joint of the pipe orifice.

In one optional technical scheme, the pipe fitting clamping block comprises a limiting part, a mounting part and a clamping part which are sequentially connected;

the semicircular clamping groove is arranged on the clamping part, and the mounting part is provided with an adjusting through hole;

step S3 includes:

placing an installation part at a preset position of the boss or the pressing block, wherein the clamping part is inward, and the limiting part is positioned at the outer side of the boss or the pressing block;

passing a connecting piece through the adjusting through hole, and transversely moving the pipe fitting clamping block to a proper position before the connecting piece is screwed down;

and screwing the connecting piece tightly to fix the pipe fitting clamping block on the boss or the pressing block.

In one optional technical scheme, the clamping part comprises a sealing layer, a heat conduction layer and a reinforcing support layer which are sequentially connected; the sealing layer is positioned on one side close to the mounting part;

the semicircular clamping groove penetrates through the reinforcing supporting layer, the heat conduction layer and the sealing layer;

step S4 includes:

when the pipe fitting is placed, a part of the pipe fitting is placed in the semicircular clamping groove, and one end of the pipe fitting penetrates through the outer side of the reinforcing support layer.

By adopting the technical scheme, the method has the following beneficial effects:

according to the method for welding and connecting the two pipe fittings by using the pipe fitting welding device, the two pipe fittings to be welded are respectively clamped by the two pipe fitting clamps, the pipe orifices of the two pipe fittings are aligned by adjusting, and then the two pipe fittings are welded by the welding handle so as to be welded together. Because the two semicircular clamping grooves are adopted to clamp the pipe fitting, the hard extrusion deformation of the pipe fitting can not be caused. The butt joint and lap joint functions can be realized for pipe fittings of different sizes, the problems of accurate butt joint positioning and size and shape constraint of small-size pipe fittings are solved, the operation is simple, and the welding quality is improved.

Drawings

Fig. 1 is a flowchart of a method for welding two pipes by using a pipe welding apparatus according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a pipe welding apparatus;

FIG. 3 is an exploded view of a pipe welding apparatus;

FIG. 4 is a schematic view of a guide bar connected between the lifting seat and the base;

FIG. 5 is a schematic view of a pipe welding apparatus welding two pipes together;

FIG. 6 is a schematic view of two tubulars held by two sets of tubular fixtures;

figure 7 is an exploded view of a pipe clamp comprised of two pipe clamp blocks;

fig. 8 is an enlarged view of the gripping portion of the tube clamp block.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in fig. 1-7, an embodiment of the present invention provides a method for welding two pipes 8 by using a pipe welding apparatus. Wherein, pipe fitting welding set includes base 1, lift seat 2, two pipe fitting anchor clamps 3 and weld 4.

The pipe clamp 3 includes two pipe clamping blocks 31 arranged up and down, and each pipe clamping block 31 has a semicircular clamping groove 3110 for clamping the pipe 8.

The lifting seat 2 is located above the base 1, and the lifting seat 2 can be driven to lift through a driving mechanism and the like, so that the upper pipe clamping block 31 and the lower pipe clamping block 31 in each pipe clamp 3 are in butt joint or separated.

When the two pipe clamping blocks 31 in each pipe clamp 3 are butted, the semicircular clamping grooves 3110 on the two pipe clamping blocks 31 are also butted to clamp the pipe 8.

The operation steps are as follows:

s1: two pipe fittings 8 to be welded are selected, and pipe orifices of the two pipe fittings 8 are pretreated, so that the end openings are smooth and have no burrs.

S2: two pipes to be welded are cleaned, and oil contamination and impurities are removed.

S3: and selecting proper two pairs of pipe fitting clamping blocks 31, and installing the two pairs of pipe fitting clamping blocks 31 on the base 1 and the lifting seat 2 in place. The pipe fitting 8 can be clamped by selecting a proper pipe fitting clamping block 31 according to the radius of the pipe fitting 8 to be welded, wherein the radius of the semicircular clamping groove 3110 is equal to or slightly smaller than the radius of the pipe fitting 8.

When the pipe fitting clamp is installed, the upper pipe fitting clamping block 31 in each pipe fitting clamp 3 is detachably installed on the bottom surface of the lifting seat 2, and the lower pipe fitting clamping block 31 in each pipe fitting clamp 3 is detachably installed on the top fixed surface of the base 1.

S4: the lifting seat 2 is lifted, and the two pipes 8 are respectively placed in the semicircular clamping grooves 3110 of the two pipe clamping blocks 31 on the base 1. One end of the pipe member 8 protrudes out of the semicircular clip groove 3110 and extends toward the pipe member 8 on the other side.

S5: the two pipes 8 are adjusted so that the orifices of the two pipes 8 are aligned. The alignment referred to herein means that the ports of the two pipes 8 are arranged substantially coaxially and in contact. The pipe fittings 8 are small-sized metal pipes, and the radiuses of the pipe fittings 8 on the two sides can be equal or unequal. When the radii are unequal, the radii of the pipe elements 8 on both sides differ by only a few millimeters, and the two pipe elements 8 can be regarded as a coaxial arrangement.

S6: the lifting seat 2 is lowered so that the two pipe clamping blocks 31 in each pipe clamp 3 are butted, and the semicircular clamping grooves 3110 of the two pipe clamping blocks 31 are butted to clamp the pipe 8. The lifting seat 2 descends, so that the pipe clamping block 31 at the bottom of the lifting seat 2 is in butt joint with the pipe clamping block 31 on the base 1, and the pipe 8 is clamped by the two semicircular clamping grooves 3110 which are in butt joint up and down.

S7: and welding the pipe orifice joint 81 of the two pipe fittings 8 by using the welding handle 4 until the welding is finished. The welding head 42 of the welding holder 4 is then inserted downwards from the lifting platform 2, aligned with the nozzle joint 81 of the two pipes 8 and welded. After the welding is finished, the lifting seat 2 is lifted, and the pipe fittings 8 which are welded together can be taken down.

The electrode holder 4 is an electrode holder clamp for holding an electrode, and the head for holding the electrode may be referred to as a welding head 42.

In one embodiment, step S1 includes: and grinding and polishing the pipe orifice of each pipe fitting 8 until the section of the pipe orifice is a plane, so as to ensure that the port is smooth and has no burrs.

In one embodiment, step S2 includes: the inside of each pipe fitting 8 is cleaned by an ultrasonic cleaning machine, and oil contamination, impurities and the like are removed.

In one embodiment, step S2 includes: greasy dirt and impurities in the range of 20mm away from the pipe orifice of each pipe fitting 8 are cleaned, so that the pipe fitting 8 is ensured to be free of impurities such as greasy dirt in the length range of at least 20mm away from the pipe orifice, and the welding is facilitated. An ultrasonic cleaner may be used to clean the inner and outer surfaces of the pipe 8.

In one embodiment, step S2 includes: the inside and outside of each pipe 8 are purged with nitrogen gas, and the pipe 8 is further cleaned to remove dust and the like.

In one of the embodiments, the time for blowing the nitrogen gas is more than 20S to thoroughly blow out dust and the like.

In one embodiment, step S5 includes: when the pipe orifices of the two pipe fittings 8 are aligned, the pipe orifice joint 81 is smaller than 0.1mm, which is beneficial to welding the two pipe fittings 8 together.

In one embodiment, as shown in fig. 2-3 and 5, the base 1 includes two bosses 11 arranged at intervals, and the lifting base 2 has two pressing blocks 21 arranged at intervals, and each pressing block 21 is located above one boss 11.

That is, the base 1 has two bosses 11 thereon, and the two bosses 11 are spaced apart and used for mounting the pipe clamp 3. A pipe clamp 3 is arranged between each press block 21 and each projection 11. A space for inserting the welding head 42 of the electrode holder 4 is formed between the two press pieces 21.

Step S3 includes: one pipe clamp block 31 of each pipe clamp 3 is detachably mounted on the top surface of the boss 11, and the other pipe clamp block 31 is detachably mounted on the bottom surface of the pressing block 21.

Step S7 includes: handle 4 is positioned on two compacts 21 and horn 42 of handle 4 is inserted downwardly from between compacts 21 into alignment with nozzle seam 81.

In one embodiment, as shown in fig. 3, 5 and 7, the pipe clamp block 31 includes a position-limiting portion 313, a mounting portion 312 and a clamping portion 311 connected in sequence.

A semicircular clip groove 3110 is provided on the clip portion 311, and the mounting portion 312 has an adjustment through hole 3121.

In this embodiment, the pipe clamping block 31 includes a limiting portion 313, a mounting portion 312 and a clamping portion 311, and the limiting portion 313, the mounting portion 312 and the clamping portion 311 are sequentially connected from outside to inside.

The mounting portion 312 is used to connect with the boss 11 or the press block 21 to fix the pipe clamp 31 on the boss 11 or on the press block 21. Semicircular clamp groove 3110 sets up on clamping part 311, and clamping part 311 is located the inboard of installation department 312 for semicircular clamp groove 3110 is close to the mouth of pipe position of pipe fitting 8 more, can make the mouth of pipe butt joint of two pipe fittings 8 better.

The stopper 313 is used to limit the horizontal movement of the pipe clamp block 31. When the position-limiting portion 313 contacts the outer surface of the boss 11 or the pressing block 21, the pipe clamping block 31 on the boss 11 or the pressing block 21 cannot move inward any more.

The adjustment through hole 3121 is an elongated through hole extending in the length direction of the mounting portion 312 or the axial direction of the semicircular clip groove 3110.

The connecting member 5 passes through the adjusting through hole 3121 and then is connected with the table 11 or the pressing block 21. When the connecting member 5 is not yet locked, the connecting member 5 can move relative to the adjusting through hole 3121 or the mounting portion 312 can move relative to the connecting member 5, and the adjusting pipe clamp block 31 can be moved laterally, the movement adjusting range being the length of the adjusting through hole 3121.

The position of the pipe clamping block 31 can be adjusted as required before the pipe clamping block 31 is fixed to better clamp the pipe 8, so that the pipe orifices of two pipes 8 can be stably butted.

In this embodiment, step S3 includes:

the mounting part 312 is placed at a predetermined position of the boss 11 or the pressing block 21 with the clamping part 311 inward and the limiting part 313 outside the boss 11 or the pressing block 21.

The connecting element 5 is passed through the adjustment through hole 3121 and the pipe clamp block 31 is moved laterally to the proper position before the connecting element 5 is tightened.

The connecting piece 5 is screwed down, and the pipe fitting clamping block 31 is fixed on the boss 11 or the pressing block 21.

In one embodiment, as shown in fig. 8, the clamping portion 311 includes a sealant layer 3113, a thermally conductive layer 3112, and a reinforcing support layer 3111 connected in sequence. The seal layer 3113 is located on a side close to the mounting portion 312. A semicircular clip groove 3110 extends through the reinforcing support layer 3111, the thermally conductive layer 3112 and the sealant layer 3113.

In this embodiment, the clamping portion 311 is a sandwich structure, and is composed of a reinforcing support layer 3111, a heat conductive layer 3112 and a sealing layer 3113. Sealing layer 3113 is connected with installation department 312, and when pipe fitting 8 was pressed from both sides by two semicircular clip groove 3110, sealing layer 3113 and the surperficial in close contact with of pipe fitting 8 play sealed effect, can avoid during the welding, and the air flows through semicircular clip groove 3110 and influences the welding. The radius of the semicircular clip groove in the sealant layer 3113 can be slightly smaller than the radius of the semicircular clip groove in the reinforcing support layer 3111 and the heat conductive layer 3112 to enable sealing contact with the surface of the tube 8. The sealing layer 3113 may be a metal layer.

Strengthen the supporting layer 3111 and be located the most inboard, its boss 11 or briquetting 21 that face the opposite side, strengthen the supporting layer 3111 and can adopt the steel deck, its rigidity is big, can improve sandwich structure's clamping part 311's structural strength to can effectively support pipe fitting 8, provide the benchmark location effect for the butt joint of pipe fitting 8.

The arrangement of the reinforcing support layer 3111 has two functions as follows:

firstly, the method comprises the following steps: the structural strength of the clamping part 311 of the sandwich structure is improved, when the upper clamping part 311 and the lower clamping part 311 are pressed to be butted, the upper reinforcing support layer 3111 and the lower reinforcing support layer 3111 are also butted, the structural strength is high, the inner side end part of the clamping part 311 can be prevented from being pressed to deform, and further damage to the inner pipe fitting 8 can be avoided.

Secondly, the method comprises the following steps: strengthen the tip that the supporting layer 3111 is close to treating of pipe fitting 8 and weld, strengthen the supporting layer 3111 and can effectively support pipe fitting 8 for the mouth of pipe fitting 8 is more stable, does benefit to the mouth of pipe butt joint of two pipe fittings 8, can make the comparatively accurate location of pipe fitting 8.

The heat conductive layer 3112 is a metal layer with good heat transfer effect, for example, a copper plate layer may be used for the heat conductive layer 3112. After heat generated during welding is transferred to the heat conduction layer 3112 through the pipe fitting 8, the heat is transferred to the pressing block 21 or the boss 11 through the heat conduction layer 3112, and heat dissipation is achieved. Of course, the reinforcing support layer 3111 and the sealing layer 3113 also conduct heat and dissipate heat, and the heat conduction and dissipation effect is not as good as that of the heat conduction layer 3112.

In this embodiment, step S4 includes:

in placing the tube 8, a portion of the tube 8 is placed in the semicircular clip groove 3110 and one end of the tube 8 is passed out of the reinforcing support layer 3111.

In one embodiment, as shown in fig. 7-8, the mounting portion 312 has an arcuate groove 3122, the arcuate groove 3122 having a radius greater than a radius of the semicircular clip groove 3110 such that there is a step between the mounting portion 312 and the semicircular clip groove 3110, the arcuate groove 3122 wraps around the semicircular clip groove 3110, and the pipe element 8 does not substantially contact the arcuate groove 3122 and does not interfere with movement of the pipe element 8.

In one embodiment, as shown in fig. 2-3 and 5, the weld holder 4 includes a handle portion 41, and the weld head 42 is attached to the handle portion 41. The handle portion 41 is detachably attached to the top surfaces of the two pressing pieces 21.

The welding handle 4 is a welding handle clamp which comprises a handle part 41 and a welding head 42, wherein the handle part 41 is used for being fixed on the pressing block 21 to provide support for the welding head 42, so that the welding head 42 stably faces the pipe opening joint 81 to weld two pipe fittings 8, and the welding quality is improved. The grip portion 41 may be mounted on the top surface of the pressing block 21 by a fastener, a clip, or the like.

In one embodiment, as shown in fig. 4, a guide rod 6 is connected between the lifting seat 2 and the base 1. The guide rod 6 provides guide for the lifting of the lifting seat 2, and a limiting plate 7 is arranged at the top of the guide rod 6.

In one embodiment, the two pipe clamps 3 are arranged coaxially to facilitate alignment of the two pipes 8.

In one embodiment, the position-limiting portion 313, the mounting portion 312 and the clamping portion 311 are integrally formed. The limiting portion 313, the mounting portion 312 and the clamping portion 311 are all metal pieces, can be formed by integral casting, and are high in structural strength.

According to the needs, the above technical schemes can be combined to achieve the best technical effect.

The foregoing is considered as illustrative only of the principles and preferred embodiments of the invention. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.

Claims

1. A method for welding and connecting two pipe fittings by adopting a pipe fitting welding device, wherein the pipe fitting welding device comprises a base, a lifting seat, two pipe fitting clamps and a welding handle;

the method is characterized by comprising the following steps:

s2: cleaning two pipes to be welded;

s5: adjusting the two pipes to align the pipe orifices of the two pipes;

2. The method of welding two pipes using a pipe welding apparatus according to claim 1,

step S1 includes: and grinding and polishing the pipe orifice of each pipe fitting until the section of the pipe orifice is a plane.

3. The method of welding two pipes using a pipe welding apparatus according to claim 1,

step S2 includes: and cleaning the interior of each pipe fitting by using an ultrasonic cleaner.

4. The method of welding two pipes using a pipe welding apparatus according to claim 1,

step S2 includes: and cleaning oil stains and impurities within the range of 20mm from the pipe orifice of each pipe fitting.

5. The method of welding two pipes using a pipe welding apparatus according to claim 1,

step S2 includes: the inside and outside of each of the pipes was purged with nitrogen.

6. The method of welding two pipes using a pipe welding apparatus according to claim 5,

the time for blowing the nitrogen gas is more than 20S.

7. The method of welding two pipes using a pipe welding apparatus according to claim 1,

step S5 includes: when the pipe orifices of the two pipe fittings are aligned, the joint of the pipe orifices is less than 0.1 mm.

8. The method of welding two pipes using a pipe welding apparatus according to claim 1,

the base comprises two bosses which are arranged at intervals, the lifting seat is provided with two pressing blocks which are arranged at intervals, and each pressing block is positioned above one boss;

9. The method of welding two pipes using a pipe welding apparatus of claim 8,

the pipe fitting clamping block comprises a limiting part, an installation part and a clamping part which are sequentially connected;

step S3 includes:

10. The method of welding two pipes using a pipe welding apparatus of claim 9,

the clamping part comprises a sealing layer, a heat conduction layer and a reinforcing support layer which are sequentially connected; the sealing layer is positioned on one side close to the mounting part;

step S4 includes: