Argon filling protection device for cylinder butt joint girth welding

Abstract

The utility model relates to the technical field of butt-joint girth welding, and provides an argon filling protection device for butt-joint girth welding of cylinders, which is arranged at the butt-joint girth of two cylinders and comprises an argon filling protection ring, an argon filling protection ring, an argon filling protection ring, an argon filling protection ring, a gas inlet pipe, a gas outlet pipe, a gas outlet pipe and a gas outlet pipe, the outer diameter of the argon filling protection ring is matched with the inner diameter of the cylinders, and an annular groove is formed in the peripheral surface of the argon filling protection ring; and the connector is fixedly installed on the argon filling protection ring and communicated with the annular groove, and the connector is connected with an argon gas pipeline. According to the argon filling protection device for butt-joint girth welding of the barrel, the argon consumption during butt-joint girth welding can be reduced, and the air isolation effect is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to butt joint ring seam welding technical field, concretely relates to a kind of argon filling protection device for cylinder butt joint ring seam welding. BACKGROUND

[0002] In the boiler drum equipment industry, the cylinder between two headers is often needed to be welded after butt joint, and the inner side of butt joint ring seam must be shaped well to meet the requirements of RT and UT nondestructive testing.

[0003] Argon arc welding process is commonly used for butt joint ring seam welding, and during the process of bottoming argon arc welding, argon gas must be filled in the inner side of butt joint ring seam for protection. The purpose of argon gas protection is to isolate air sufficiently during argon arc welding to prevent cracks, undercut and lack of fusion in welds caused by oxidation.

[0004] When the diameter of header cylinder is small, for example, when the diameter of header cylinder is ф219, the header cylinder is plugged at both ends for butt joint ring seam welding, argon gas is filled in and air is exhausted to achieve the effect of air isolation. However, when the diameter of header cylinder is large, for example, when the diameter of header cylinder is ф500, if the above-mentioned method is still used for butt joint ring seam welding, it will result in large consumption of argon gas, and because the space of header cylinder is large, air cannot be completely exhausted, which will greatly affect the quality of welds. CONTENT OF THE UTILITY MODEL

[0005] In view of the defects in the prior art, the utility model aims to provide an argon filling protection device for cylinder butt joint ring seam welding, which can reduce the consumption of argon gas during butt joint ring seam welding and achieve better air isolation effect.

[0006] To achieve the above-mentioned purpose, the utility model realizes the technical scheme as follows: an argon filling protection device for cylinder butt joint ring seam welding is arranged at the butt joint ring seam of two cylinders, which comprises:

[0007] An argon filling protection ring, the outer diameter of which is adapted to the inner diameter of the cylinder, and an annular groove is formed on the outer peripheral surface of the argon filling protection ring;

[0008] A joint, which is fixedly installed on the argon filling protection ring and communicates with the annular groove, and the joint is connected with an argon gas pipeline.

[0009] Further, the argon filling protection ring comprises a first arc-shaped section and a second arc-shaped section, and the two ends of the first arc-shaped section are detachably connected with the two ends of the second arc-shaped section.

[0010] Further, the central angle of the first arc-shaped section is greater than 180°.

[0011] The first arc-shaped section is provided with an adjusting assembly for controlling the two ends of the first arc-shaped section to move closer to or away from each other.

[0012] Further, the adjusting assembly comprises a first stud, a second stud and a threaded sleeve, the first stud and the second stud are symmetrically arranged and fixedly connected with the first arc-shaped section, the thread rotation direction of the first stud is opposite to that of the second stud, and the two ends of the threaded sleeve are threadedly connected with the first stud and the second stud respectively.

[0013] Further, the two ends of the first arc-shaped section are respectively point-welded with the two ends of the second arc-shaped section.

[0014] Further, the sealing material is filled between the argon-filled protection ring and the cylinder.

[0015] Further, the sealing material is fire-resistant and flame-retardant glue.

[0016] Further, the annular groove extends inwardly and inwardly inclines on the outer circumferential surface of the argon-filled protection ring.

[0017] The argon-filled protection device for butt joint ring seam welding of the cylinder has the advantages that: when in use, the annular groove is aligned with the butt joint ring seam, argon gas is filled into the annular groove through the joint of the argon gas pipeline, argon gas protection is formed on the inner side of the butt joint ring seam, the effect of air isolation is better, and the space of the annular groove is small, so that the consumption of argon gas during butt joint ring seam welding can be reduced compared with the traditional mode. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a top view of the device;

[0019] Figure 2 Fig. 2 is a sectional view of the device;

[0020] Figure 3 Fig. 3 is an enlarged view of part A of Fig. 2. Figure 2

[0021] Reference signs: 10-cylinder, 11-butt joint ring seam, 20-argon-filled protection ring, 21-annular groove, 22-first arc-shaped section, 23-second arc-shaped section, 30-joint, 40-adjusting assembly, 41-first stud, 42-second stud, 43-threaded sleeve. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, purposes and effects of the device easy to understand, the device is further described below in combination with specific embodiments.

[0023] ​In this application, unless otherwise expressly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In the description of this application, it should be understood that the terms "longitudinal", "horizontal", "level", "top", "bottom", "upper", "lower", "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0026] like Figures 1-3 As shown, this utility model provides an argon-filled protective device for welding the circumferential seam of two cylinders 10, which is installed at the circumferential seam 11 of the two cylinders 10 and includes an argon-filled protective ring 20 and a joint 30.

[0027] The outer diameter of the argon-filling protective ring 20 is adapted to the inner diameter of the cylinder 10, and an annular groove 21 is opened on the outer circumferential surface of the argon-filling protective ring 20.

[0028] The connector 30 is fixedly installed on the argon filling protection ring 20 and communicates with the annular groove 21. The connector 30 is connected to the argon gas pipeline.

[0029] The specific usage process of this device is as follows: First, the operator assembles the device at the joint 11 of the two cylinders 10, aligning the annular groove 21 with the joint 11. Then, argon gas is introduced into the annular groove 21 through the connector 30 until the entire annular groove 21 is filled. The original air in the annular groove 21 is discharged through the joint 11, thus forming an argon gas protection on the inside of the joint 11, which provides better air isolation. This ensures better weld quality during subsequent welding of the joint 11. Furthermore, due to the small space of the annular groove 21, the argon gas consumption during welding of the joint 11 is reduced compared to traditional methods.

[0030] When this device is in use, argon gas is only filled into a very small space, such as the annular groove 21. Therefore, the argon gas consumption has been minimized. Compared with the traditional method of welding the butt joint 11 by filling the entire cylinder 10 with argon gas, the argon gas consumption has been reduced to one-thousandth or one-ten-thousandth, which has great economic value.

[0031] In one embodiment, the argon-filled protective ring 20 includes a first arc-shaped segment 22 and a second arc-shaped segment 23, wherein the two ends of the first arc-shaped segment 22 are detachably connected to the two ends of the second arc-shaped segment 23.

[0032] In the initial state, the first arc segment 22 and the second arc segment 23 are not connected together.

[0033] When assembling this device at the joint 11 of the two cylinders 10, the workers can first assemble the first arc segment 22, then assemble the second arc segment 23, and then connect the two ends of the first arc segment 22 to the two ends of the second arc segment 23 to form a complete argon-filled protective ring 20. At this time, the annular groove 21 is also complete.

[0034] This design facilitates the installation of the argon-filled protective ring 20 inside the cylinder 10, and also makes it easy to remove the argon-filled protective ring 20 after the subsequent welding of the ring seam 11. If the argon-filled protective ring 20 is always a complete ring, it is difficult to move inside the cylinder 10, which would cause great difficulties for the assembly and disassembly work.

[0035] In one embodiment, the central angle of the first arc segment 22 is greater than 180°.

[0036] An adjustment component 40 is provided inside the first arc segment 22. The adjustment component 40 is used to control the two ends of the first arc segment 22 to move closer to or further apart from each other.

[0037] During the assembly or disassembly of this device, when the first arc-shaped segment 22 moves inside the cylinder 10, the adjusting component 40 controls the two ends of the first arc-shaped segment 22 to move closer to each other, so that the diameter of the first arc-shaped segment 22 will become smaller, further facilitating the movement of the first arc-shaped segment 22 inside the cylinder 10.

[0038] After the first arc segment 22 is assembled, the adjusting component 40 can control the two ends of the first arc segment 22 to move away from each other until the outer circumferential surface of the first arc segment 22 is in contact with the inner wall of the cylinder 10.

[0039] In one embodiment, the adjusting assembly 40 includes a first stud 41, a second stud 42, and a threaded sleeve 43. The first stud 41 and the second stud 42 are symmetrically arranged and both are fixedly connected to the first arc-shaped segment 22. The thread direction on the first stud 41 is opposite to that on the second stud 42. The two ends of the threaded sleeve 43 are threadedly connected to the first stud 41 and the second stud 42, respectively.

[0040] Since the thread direction on the first stud 41 is opposite to that on the second stud 42, when the operator rotates the sleeve 43 clockwise, the two ends of the first arc segment 22 will move closer to each other; when the operator rotates the sleeve 43 counterclockwise, the two ends of the first arc segment 22 will move further apart.

[0041] This adjustment component 40 has a simple structure and is easy to manufacture and use.

[0042] In one embodiment, the two ends of the first arc segment 22 are welded to the two ends of the second arc segment 23, respectively.

[0043] Workers can first assemble the first arc segment 22, then assemble the second arc segment 23, and then weld the two ends of the first arc segment 22 to the two ends of the second arc segment 23 to form a complete argon-filled protective ring 20.

[0044] Spot welding provides good stability and is easy to disassemble, while also allowing for quick operation by staff.

[0045] In one embodiment, a sealing material is filled between the argon-filled protective ring 20 and the cylinder 10 to improve the sealing between the argon-filled protective ring 20 and the cylinder 10 and prevent argon gas leakage from the annular groove 21.

[0046] In one embodiment, the sealing material is a fire-resistant and flame-retardant adhesive.

[0047] In one embodiment, the annular groove 21 extends inward and slopes inward on the outer circumferential surface of the argon-filled protective ring 20, that is, the longitudinal section of the annular groove 21 is trapezoidal.

[0048] The specific assembly process of this device is as follows:

[0049] First, the worker rotates the threaded sleeve 43 clockwise, bringing the two ends of the first arc-shaped segment 22 closer together and reducing the diameter of the first arc-shaped segment 22. The first arc-shaped segment 22 is then fitted onto the mating circumferential seam 11, at which point the annular groove 21 on the first arc-shaped segment 22 is aligned with the mating circumferential seam 11. Then, the threaded sleeve 43 is rotated counterclockwise, increasing the diameter of the first arc-shaped segment 22 until the outer circumferential surface of the first arc-shaped segment 22 is tightly attached to the inner wall of the cylinder 10.

[0050] The second step is to weld the two ends of the second arc segment 23 to the two ends of the first arc segment 22 to form a complete argon-filled protective ring 20. At this time, the annular groove 21 is also complete.

[0051] The third step is to fill the space between the argon-filled protective ring 20 and the cylinder 10 with fire-resistant and flame-retardant adhesive to seal the local gaps between the protective ring 20 and the inner wall of the cylinder 10.

[0052] Fourth, argon gas is introduced into the annular groove 21 through the connector 30 until the entire annular groove 21 is filled with argon gas. The original air in the annular groove 21 is discharged through the docking annular seam 11, thus forming argon gas protection on the inside of the docking annular seam 11.

[0053] Fifth step: After the welding of the butt joint 11 is completed, first remove the second arc segment 23; then rotate the screw sleeve 43 to make the two ends of the first arc segment 22 approach each other, and the diameter of the first arc segment 22 becomes smaller. Remove the first arc segment 22 and take the device out of the cylinder 10 to complete the dismantling.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0055] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An argon-filled protective device for butt joint welding of two cylinders, characterized in that: include: An argon-filling protective ring is provided, the outer diameter of which is adapted to the inner diameter of the cylinder, and an annular groove is formed on the outer circumferential surface of the argon-filling protective ring. The connector is fixedly installed on the argon-filling protective ring and communicates with the annular groove. The connector is connected to the argon gas pipeline.

2. The argon-filled protective device for circumferential welding of cylindrical bodies according to claim 1, characterized in that: The argon-filled protective ring includes a first arc-shaped segment and a second arc-shaped segment, with the two ends of the first arc-shaped segment being detachably connected to the two ends of the second arc-shaped segment, respectively.

3. An argon-filled protective device for circumferential welding of cylindrical bodies according to claim 2, characterized in that: The central angle of the first arc segment is greater than 180°; An adjustment component is provided within the first arc segment, which is used to control the two ends of the first arc segment to move closer to or further apart from each other.

4. An argon-filled protective device for circumferential welding of cylindrical bodies according to claim 3, characterized in that: The adjustment assembly includes a first stud, a second stud, and a threaded sleeve. The first stud and the second stud are symmetrically arranged and both are fixedly connected to the first arc segment. The thread direction on the first stud is opposite to that on the second stud. The two ends of the threaded sleeve are threadedly connected to the first stud and the second stud, respectively.

5. An argon-filled protective device for circumferential welding of cylindrical bodies according to claim 2, characterized in that: The two ends of the first arc segment are welded to the two ends of the second arc segment, respectively.

6. An argon-filled protective device for circumferential welding of cylindrical bodies according to claim 1, characterized in that: The space between the argon-filled protective ring and the cylinder is filled with sealing material.

7. An argon-filled protective device for circumferential welding of cylindrical bodies according to claim 6, characterized in that: The sealing material is a fire-resistant and flame-retardant adhesive.

8. An argon-filled protective device for circumferential welding of cylindrical bodies according to claim 1, characterized in that: The annular groove extends inward and slopes inward on the outer circumferential surface of the argon-filled protective ring.

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