Stainless steel small pipe socket argon arc welding structure of hydrolyzer

Abstract

The utility model discloses a stainless steel small pipe socket argon arc welding structure of a hydrolyzer, which comprises a socket elbow pipe and a stainless steel pipe fitting welded at one end of the socket elbow pipe in a socket manner, and socket pipe orifices which are of arc-shaped structures and fit with one end of the stainless steel pipe fitting in a socket manner are integrally formed at two ends of the socket elbow pipe. One end of the stainless steel pipe fitting is inserted into the socket pipe orifice, the welding arc-shaped block on the welding part of the pipe fitting slides into the welding reinforcing cambered surface groove, and the welding melting part of the welding part of the pipe fitting and the welding arc-shaped block flows into the welding reinforcing cambered surface groove in an argon arc welding mode, so that the socket pipe orifice is limited and welded to the surface of the stainless steel pipe fitting. By means of the socket welding mode, the socket pipe opening and the stainless steel pipe fitting can be fused into a whole, the socket pipe opening and the stainless steel pipe fitting can be effectively welded and limited in the using process at the socket connecting position, and the firmness of socket argon arc welding is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of butt argon arc welding for thin-walled stainless steel pipes, and particularly relates to a butt argon arc welding structure for a small stainless steel pipe of a hydrolyzer. Background Art

[0002] For the traditional butt argon arc welding connection structure of thin-walled stainless steel pipes, butt argon arc welding connection is adopted between pipe fittings and pipes. The expanded socket part (referred to as socket) 1 at the end of the pipe fitting plays a positioning role. A flat ring groove 2 with a width A of 0.5 mm to 1.5 mm and a thickness B of 0.3 mm to 0.6 mm is made at the end of the socket 1. During welding, the groove 2 at the end of the socket 1 is directly melted and welded to the outer wall of the pipe 4. Since the thickness of the welded part 3 is only 0.3 to 0.6 mm, the tensile strength of this part is low, becoming a weak point in the pressure resistance and anti-deformation of the pipeline system; at the same time, the welding requirements are relatively high, it is easy to melt and flow, further reducing the connection thickness, resulting in uneven thickness, and it is also easy to penetrate the pipe, causing welding nodules to be generated on the inner wall of the pipe.

[0003] Therefore, a butt argon arc welding connection structure for thin-walled stainless steel pipes with the publication number of "CN201416722Y" includes a socket. Its characteristic lies in that a groove with a right trapezoidal cross-section is provided at the end of the socket. The utility model absorbs the process characteristics of argon gas shielded arc fusion welding for the forming of welded seamless thin-walled stainless steel pipes (wall thickness is 0.6 mm to 1.5 mm), and utilizes the difference in geometric shapes to enhance the strength of the welded part and reduce the welding skill requirements. The advantages of the utility model are: increasing the thickness of the welded part, enhancing the tensile strength of the welded part and reducing the requirements for welding skills.

[0004] However, for the above-mentioned butt argon arc welding connection structure of thin-walled stainless steel pipes, although the groove at the end of the socket of the pipe fitting is directly melted and welded to the outer wall of the pipe, enhancing the strength of the welded part and avoiding phenomena such as easy melting and flowing during the welding of the original flat ring groove and easy penetration of the thin-walled pipe to be connected, there are still the following obvious defects during use: Then, since the welded part is surface-welded on the surface of one end of the stainless steel pipe fitting during argon arc welding, the welding part will be welded by fitting instead of limiting the welded part to fit for welding, so that the welding part between the stainless steel pipe fitting and the socket is likely to have a problem of detaching from the surface of the stainless steel pipe fitting under long-term high pressure. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a butt argon arc welding structure for a small stainless steel pipe of a hydrolyzer to solve the problems raised in the above background art.

[0006] To achieve the above object, the present utility model provides the following technical solution: a butt-argon arc welding structure for stainless steel small pipes of a hydrolyzer, comprising a connecting elbow, and a stainless steel pipe fitting butt-welded to one end of the connecting elbow. Both ends of the connecting elbow are integrally formed with arc-shaped structures and socket pipe mouths that are butted and fitted to one end of the stainless steel pipe fitting. One end of the socket pipe mouth is integrally formed with a socket insertion pipe larger than the diameter of the stainless steel pipe fitting. One end of the socket insertion pipe is provided with a pipe fitting welding body for inserting the stainless steel pipe fitting into the socket insertion pipe and welding them into one body. At a position corresponding to the pipe fitting welding body inside the socket pipe mouth where the stainless steel pipe fitting is inserted, there is an integrally formed welding reinforcement arc surface groove.

[0007] Preferably, the surface of the port at one end of the stainless steel pipe fitting inserted into the socket pipe mouth is provided with a fitting butt arc surface, which can enable one end of the stainless steel pipe fitting to be completely received and fitted for welding.

[0008] Preferably, a sealing and anti-corrosion rubber ring that is hermetically fitted to the inner wall of the socket pipe mouth is sleeved on the surface of the stainless steel pipe fitting inserted into one end of the connecting elbow, so as to seal between the stainless steel pipe fitting and the socket pipe mouth after insertion.

[0009] Preferably, an insertion joint is integrally formed at one end of the fitting butt arc surface of the stainless steel pipe fitting, so as to realize the fusion and connection between the stainless steel pipe fitting and the socket pipe mouth and strengthen the sealing performance of the connection between the two.

[0010] Preferably, after the insertion joint is inserted into the socket pipe mouth, it is combined and inserted with the inner wall of the socket pipe mouth to form an integral body, so as to improve the firmness of the insertion between the stainless steel pipe fitting and the connecting elbow.

[0011] Preferably, a welding arc-shaped block that is integrally welded and adapted to the welding reinforcement arc surface groove is provided at the bottom of the pipe fitting welding body at one end of the socket pipe mouth, so as to ensure that the butt-argon arc welding between the stainless steel pipe fitting and the connecting elbow is more firm and stable after welding.

[0012] Compared with the prior art, the technical effects and advantages of the present utility model are as follows: for the butt-argon arc welding structure of the stainless steel small pipes of this hydrolyzer, through the combination of the pipe fitting welding part and the welding arc-shaped block on the socket pipe mouth at one end of the connecting elbow, and in cooperation with the butt welding between the welding reinforcement arc surface grooves on the stainless steel pipe fitting, one end of the stainless steel pipe fitting is inserted into the socket pipe mouth, so that the welding arc-shaped block on the pipe fitting welding part slides into the welding reinforcement arc surface groove, and the melted part of the pipe fitting welding part and the welding arc-shaped block is welded and melted into the welding reinforcement arc surface groove by argon arc welding, so that the socket pipe mouth is limited and welded on the surface of the stainless steel pipe fitting. This kind of butt welding method can fuse the socket pipe mouth and the stainless steel pipe fitting into one body, so that the butt joint is effectively welded and limited during use, further improving the firmness of the butt-argon arc welding and further solving the problems and defects proposed by the prior art.

[0013] After the socket combination among the socket connection pipe orifice, the fitting butt joint arc surface, the sealing and anticorrosive rubber ring, and the socket connection joint, after the stainless steel pipe fitting is socketed into the socket connection pipe inside one end of the socket connection elbow, the fitting butt joint arc surface on the stainless steel pipe fitting is fitted on the inner wall of the socket connection pipe orifice, and the sealing and anticorrosive rubber ring seals the gap between the two, so that after the socket connection elbow and the stainless steel pipe fitting are socket welded, the solution in the hydrolyzer is prevented from flowing into the gap at the socket welding joint, and the problem of detachment due to the corrosion effect of the solution on the socket welding joint can be avoided. Brief Description of the Drawings

[0014] Figure 1 is a schematic structural view of the present utility model;

[0015] Figure 2 is a front view structural schematic view of the stainless steel pipe fitting of the present utility model.

[0016] In the figure: 1, socket connection elbow; 3, stainless steel pipe fitting; 4, socket connection pipe orifice; 5, socket connection pipe; 6, pipe fitting welding body; 7, welding reinforcement arc surface groove; 8, fitting butt joint arc surface; 9, sealing and anticorrosive rubber ring; 10, socket connection joint; 11, welding arc-shaped block. Detailed Embodiment

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Please refer to Figure 1-2 , the present utility model provides a technical solution: a socket argon arc welding structure for a small stainless steel pipe of a hydrolyzer, including a socket connection elbow 1 and a stainless steel pipe fitting 3 socket welded to one end of the socket connection elbow 1, which can realize the argon arc welding connection between the stainless steel pipe fitting 3 of the hydrolyzer and the socket connection elbow 1, and reduce the phenomenon of welding point detachment between the stainless steel pipe fitting 3 and the socket connection elbow 1. The two ends of the socket connection elbow 1 are integrally formed with socket connection pipe orifices 4 having an arc structure and fitting with one end of the stainless steel pipe fitting 3 in a socket connection manner, so that the stainless steel pipe fitting 3 is socket inserted into the socket connection pipe orifice 4 in a fitting manner, and the wall thickness of the stainless steel pipe fitting 3 is 0.8 mm to 2.0 mm, realizing the socket connection between the stainless steel pipe fitting 3 and the socket connection elbow 1. One end of the socket connection pipe orifice 4 is integrally formed with a socket connection pipe 5 having a diameter larger than that of the stainless steel pipe fitting 3, so that the stainless steel pipe fitting 3 can be quickly socket inserted into the inside of the socket connection pipe 5 for connection.

[0019] One end of the receiving insertion tube 5 is provided with a pipe fitting welding body 6 for inserting the stainless steel pipe fitting 3 into the receiving insertion tube 5 for welding and melting into one body, so that after the stainless steel pipe fitting 3 and the receiving elbow 1 are received, they are melted and connected by argon arc welding. The stainless steel pipe fitting 3 is inserted into the inside of the receiving pipe orifice 4, and at a position corresponding to the pipe fitting welding body 6, there is an integrally formed welding reinforcement arc surface groove 7, so that the pipe fitting welding body 6 is welded and melted and flows into the welding reinforcement arc surface groove 7, making the connection between the two more firm and stable, without the phenomenon of welding detachment. The stainless steel pipe fitting 3 is made of a seamless thin-walled stainless steel pipe with a thickness of 0.8 mm to 2.0 mm. Utilizing the good plasticity of stainless steel, it is formed by cold extrusion technology, so that the main structure of the stainless steel pipe fitting 3 is an integral body, with reliable pressure resistance performance.

[0020] On the surface of the port at one end of the stainless steel pipe fitting 3 inserted into the inside of the receiving pipe orifice 4, there is a fitting butt arc surface 8, which enables the stainless steel pipe fitting 3 to better contact and fit with the inner wall of the receiving pipe orifice 4, avoiding the solution from flowing into the gap between the two. A sealing and anti-corrosion rubber ring 9 that is hermetically fitted with the inner wall of the receiving pipe orifice 4 is sleeved on the surface of the stainless steel pipe fitting 3 where it is inserted into one end of the receiving elbow 1, so as to seal the receiving and combining gap between the stainless steel pipe fitting 3 and the receiving pipe orifice 4. At one end of the fitting butt arc surface 8 of the stainless steel pipe fitting 3, there is an integrally formed insertion and combining part 10, which improves the sealing performance of the welding at the insertion, reducing the phenomenon of the solution flowing into the gap and causing corrosion to the welding.

[0021] After the insertion and combining part 10 is inserted into the inside of the receiving pipe orifice 4 of the stainless steel pipe fitting 3, it is combined and inserted with the inner wall of the receiving pipe orifice 4 to form an integral body. At the bottom of the pipe fitting welding body 6 at one end of the receiving pipe orifice 4, there is a welding arc-shaped block 11 that is integrally welded and adapted to the welding reinforcement arc surface groove 7, so that after the receiving pipe orifice 4 and the stainless steel pipe fitting 3 are combined, they are welded and melted and the welding arc-shaped block 11 is received to form an integral body.

[0022] Specifically, during use, first prepare the equipment for argon arc welding. Then, process the surface of one end of the stainless steel pipe fitting 3 that needs to be connected into a fusion reinforcement arc surface groove 7. Insert the processed end of the stainless steel pipe fitting 3 into the inside of the socket 4, and make the fitting butt arc surface 8 fit with one end of the inner wall of the socket 4. At the same time, the socket joint 10 is inserted and fitted on the entire inner wall of the socket 4, so that after the stainless steel pipe fitting 3 and the connecting elbow 1 are connected, they fit together to reduce the generation of gaps, avoiding the phenomenon that the solution in the hydrolyzer flows into the gaps and causes corrosion and de-welding at the connection weld. Subsequently, make the pipe fitting fusion body 6 at one end of the socket 4 fit on the surface of the stainless steel pipe fitting 3, and the fusion arc-shaped block 11 provided on the pipe fitting fusion body 6 is limited and clamped around the fusion reinforcement arc surface groove 7. When welding with the argon arc welding equipment, melt the pipe fitting fusion body 6 on the socket 4, and at the same time, the fusion arc-shaped block 11 also melts, so that the pipe fitting fusion body 6 melts and is welded to the outer wall of the stainless steel pipe fitting 3, and the melted fusion arc-shaped block 11 flows into the fusion reinforcement arc surface groove 7, enhancing the strength of the pipe fitting fusion body 6 and the firmness of the fusion between the socket 4 and the stainless steel pipe fitting 3, achieving an effective effect of being fused into one body after fusion between the two, strengthening the connection strength after fusion between the two, improving the welding reliability, enhancing the pressure resistance performance, and increasing the tensile strength.

[0023] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A socket-and-spigot argon arc welding structure of a small stainless steel tube of a hydrolyzer, comprising a socket-and-spigot elbow (1), and a stainless steel pipe fitting (3) socket-and-spigot welded at one end of the socket-and-spigot elbow (1), characterized in that: Both ends of the connecting elbow (1) are integrally formed with a bell-and-spigot pipe opening (4) of an arc-shaped structure and socket-fitted with one end of the stainless steel pipe fitting (3); one end of the bell-and-spigot pipe opening (4) is integrally formed with a connecting spigot (5) having a diameter larger than that of the stainless steel pipe fitting (3); one end of the connecting spigot (5) is provided with a pipe fitting fusion body (6) for inserting the stainless steel pipe fitting (3) into the connecting spigot (5) for welding and fusing into one body; the stainless steel pipe fitting (3) is inserted into the bell-and-spigot pipe opening (4) and is provided with an integrally formed welding reinforcement arc groove (7) at a position corresponding to the pipe fitting fusion body (6).

2. The stainless steel small pipe socket argon arc welding structure of a hydrolyzer according to claim 1, characterized in that: The stainless steel pipe (3) is inserted into the socket pipe opening (4) at one end thereof, and a fitting butt-jointing arc surface (8) is provided on its surface.

3. The stainless steel small pipe socket argon arc welding structure of a hydrolyzer according to claim 1, characterized in that: The surface of the stainless steel pipe fitting (3) and the socket of one end of the socket elbow (1) is sleeved with a sealing anti-corrosion rubber ring (9) which is in sealing contact with the inner wall of the socket pipe opening (4).

4. The stainless steel small pipe socket argon arc welding structure of a hydrolyzer according to claim 2, characterized in that: One end of the stainless steel pipe (3) that fits the butt-jointed curved surface (8) is integrally formed with a socket joint (10).

5. The stainless steel small pipe socket argon arc welding structure of a hydrolyzer according to claim 4, characterized in that: After the stainless steel pipe fitting (3) is inserted into the interior of the socket pipe opening (4), the socket joint (10) is combined with the inner wall of the socket pipe opening (4) to form a socket-and-spigot joint.

6. The stainless steel small pipe socket argon arc welding structure of a hydrolyzer according to claim 1, characterized in that: A welding arc block (11) adapted to be welded integrally with the welding reinforcement arc groove (7) is provided at the bottom of the pipe fitting welding body (6) at one end of the socket pipe opening (4).

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