Adjustable argon protective cover for zirconium pipe welding

Abstract

The utility model discloses an adjustable argon protective cover for zirconium pipe welding, which comprises a hollow bottomless protective cover body, the protective cover body comprises a top plate, a left side plate, a right side plate, a front side plate and a rear side plate, the left side plate, the right side plate, the front side plate and the rear side plate are connected to the edge of the top plate, the top plate is made of a thin steel plate with the thickness of 0.5-1.5 mm, and the top plate is connected with an argon interface pipeline. The argon interface pipeline is communicated with the inner cavity of the protective cover body; a welding gun socket is formed in the top plate close to the front side plate or the rear side plate; the left side plate and the right side plate are both composed of metal sheets arranged in sequence, a fixing point is arranged between the top of each metal sheet and the top plate, and the edges of the adjacent metal sheets are arranged in a front-back overlapping and staggered mode. The top plate of the protective cover body is made of the thin steel plate, and the metal sheets on the left side and the right side can contract towards the middle while the top plate is bent through manual bending, so that the whole protective cover is bent to adapt to the curvature of a zirconium pipe to be welded.

Description

Technical Field

[0001] This utility model relates to an adjustable argon gas protective cover for welding zirconium tubes, belonging to the technical field of welding protection equipment. Background Technology

[0002] Zirconium is a chemically highly reactive element that readily reacts with various atmospheric gases at high temperatures, exhibiting excellent corrosion resistance and making it widely used in petrochemical plant construction. However, during zirconium welding, the weld and heat-affected zone are easily contaminated by elements such as oxygen, hydrogen, and nitrogen in the air, forming hard and brittle compounds and producing a brittle needle-like structure. This increases the hardness and strength of the weld joint while decreasing its plasticity and significantly reducing its corrosion resistance. Therefore, during zirconium welding, the molten pool, weld, and heat-affected zone must be adequately protected to completely isolate them from air.

[0003] However, due to the diverse diameters and curvatures of zirconium tubes, various protective covers of different specifications must be manufactured according to the diameter of the zirconium tube during the welding process. The protective covers have low versatility, and the speed and direction of argon gas inside the protective cover affect the appearance and quality of the zirconium weld. Furthermore, existing protective covers cannot adjust their curvature and are not suitable for pipes of different diameters. Moreover, existing argon gas protective covers cannot promote the rapid, stable, and uniform filling of the protective cover with argon gas, failing to form a continuous isolation layer, thus affecting the quality of the zirconium tube weld. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable argon gas shield for welding zirconium tubes of different diameters. This solves the technical problem that the curved surface of existing argon gas shields is not adjustable and cannot be used for different tube diameters.

[0005] This utility model adopts the following technical solution: an adjustable argon gas protective cover for zirconium tube welding, comprising a hollow, bottomless protective cover body, the protective cover body comprising a top plate and a left side plate, a right side plate, a front side plate and a rear side plate connected to the edge of the top plate, the top plate being made of a thin steel plate with a thickness of 0.5-1.5mm, the top plate being connected to an argon gas interface pipe, the argon gas interface pipe communicating with the inner cavity of the protective cover body, and a welding gun insertion port being provided on the top plate near the front side plate or the rear side plate; the left side plate and the right side plate are both composed of sequentially arranged metal sheets, each metal sheet having a fixed point between its top and the top plate, and the edges of adjacent metal sheets being stacked and staggered.

[0006] The protective cover body has a gas distribution assembly fixed to the top plate. The gas distribution assembly has distribution holes for gas to pass through. The gas distribution assembly is the same size and shape as the top plate.

[0007] The gas distribution component is fixed to the protective cover body by a gate-shaped elastic buckle, with the two ends of the elastic buckle respectively pressing against the connection between the top plate and the front and rear walls of the protective cover body.

[0008] The gas distribution assembly includes an upper wire mesh, a steel wool ball, and a lower wire mesh arranged sequentially from top to bottom.

[0009] The upper layer of wire mesh is made of 200-mesh steel wire mesh, and the lower layer of wire mesh is made of 100-mesh steel wire mesh.

[0010] The welding torch inlet is a semi-circular structure. A semi-circular baffle is fixed at the welding torch inlet. The height of the baffle is greater than that of the top plate. A clamp is connected to the upper part of the baffle. Both ends of the clamp are fixed to the baffle to form a ring structure with the baffle. One end of the clamp is fixedly connected to the baffle, and the other end is connected to the baffle with an adjusting bolt.

[0011] A connecting plate is connected between the baffle and the top plate. The connecting plate has an L-shaped structure, and its two ends are welded to the baffle and the top plate, respectively.

[0012] The argon gas interface pipeline includes a straight short pipe, a square pipe, and a gas-sealing pipe. The square pipe is connected between the straight short pipe and the gas-sealing pipe. The straight short pipe is vertically fixed to the top plate. A fixing nut is connected between the straight short pipe and the top plate. A copper silencer is provided on the inner side of the connection between the top plate and the straight short pipe.

[0013] Both the front and rear side panels have notches at their lower parts.

[0014] The metal sheet adopts a trapezoidal structure with a smaller top and a larger bottom, and the top of the metal sheet is spot-welded to the top plate.

[0015] The beneficial effects of this utility model are as follows: The top plate of the protective cover body in this utility model is made of thin steel plate. The curvature of the protective cover body can be changed by manual bending to adapt to the curvature of the zirconium tube to be welded. Before welding, the protective cover body is attached to the pipe weld and manually pressed down along the pipe (or the protective cover body can be held directly by hand). Under the action of external force, the top plate of the protective cover body bends, and at the same time, the metal plates on the left and right sides contract towards the middle, thus bending the entire protective cover. The bottom opening surface is approximately arc-shaped. Since each metal plate overlaps with the previous one, the overlap depth of the metal plates increases as the force is applied to bend the protective cover according to the pipe diameter, achieving adjustment and change according to the curvature of the pipe. When welding pipes of different diameters, slightly pressing down on the protective cover or bending the protective cover body upwards from both ends causes the curvature of the top plate and the arc surface formed by the metal plates on the left and right sides to change with the curvature of the pipe to be welded, thus fitting snugly against the curved surface of the pipe. In use, the welding torch is inserted into the torch socket for welding. Argon gas is filled into the protective cover body through the argon gas interface pipe. The protective cover body moves forward along the weld seam with the welding torch, protecting the weld seam that the welding torch head has just completed. This utility model can adjust the curvature of the protective cover body according to the diameter of the zirconium tube when welding zirconium tubes of different diameters, making it widely applicable.

[0016] Preferably, the gas distribution component enables the argon gas entering the protective cover to fill the protective cover more evenly and stably.

[0017] Preferably, the upper and lower layers of wire mesh can not only fix the steel wool balls and make them evenly distributed, but also slow down and evenly disperse the argon gas entering the protective cover, so as to promote the rapid, stable and uniform filling of the protective cover with argon gas.

[0018] Preferably, the gas distribution assembly is pressed tightly against the inside of the top plate by an elastic buckle with a gate-shaped structure. The elastic buckle matches the size of the protective cover. After installation, the elastic buckle bends under force to fix and compact the gas distribution assembly, further stabilizing the quality of the zirconium tube weld.

[0019] Preferably, the square pipe and the straight short pipe can adjust the airflow speed and direction, and the copper silencer can silence the airflow.

[0020] Preferably, the metal sheet adopts a trapezoidal structure that is smaller at the top and larger at the bottom, so that the lower part of the metal sheet is not easily squeezed or stuck when the curvature of the protective cover body changes.

[0021] Preferably, the notches on the front and rear side plates of the protective cover body are located above the weld. When the protective cover moves, it will not affect the weld, and argon gas will be discharged from the notches, which is beneficial to protecting the weld. Attached Figure Description

[0022] Figure 1 This is an overall schematic diagram of an adjustable argon gas protective cover for welding zirconium tubes according to an embodiment of this utility model;

[0023] Figure 2 yes Figure 1 Diagram showing the usage status of the adjustable argon gas shield for zirconium tube welding;

[0024] Figure 3 yes Figure 1 A partial view;

[0025] Figure 4 yes Figure 1 A plan view;

[0026] Figure 5 yes Figure 4 A sectional view;

[0027] Figure 6 yes Figure 5 A magnified view of a portion at point A;

[0028] Figure 7 yes Figure 4 A bottom view;

[0029] Figure 8 yes Figure 7 The diagram shows the elastic buckle before and after installation.

[0030] In the diagram: 1-Protective cover body, 101-Top plate, 102-Metal sheet, 103-Notch, 2-Welding torch socket, 201-Baffle, 202-Clamp, 203-Connecting plate, 3-Argon gas interface pipe, 301-Copper silencer, 302-Fixing nut, 303-Straight short pipe, 304-Square pipe, 305-Gas hose pipe, 4-Gas distribution assembly, 401-Elastic buckle, 402-Upper wire mesh, 403-Steel wire ball, 404-Lower wire mesh, 5-Welding torch, 6-Welding wire, 7-Weld pool, 8-Argon gas pipe, 9-Zirconium tube to be welded. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1 to 8As shown, an adjustable argon gas protective cover for zirconium tube welding according to an embodiment of the present invention includes a hollow, bottomless protective cover body 1. The protective cover body 1 includes a top plate 101 and a left side plate, a right side plate, a front side plate, and a rear side plate connected to the edge of the top plate. The top plate 101 is made of a thin steel plate with a thickness of 0.5-1.5mm. An argon gas interface pipe 3 is connected to the top plate 101, and the argon gas interface pipe 3 communicates with the inner cavity of the protective cover body 1. A welding gun insertion port 2 is provided on the top plate 101 near the front side plate or the rear side plate. The left side plate and the right side plate are both composed of sequentially arranged metal sheets 102. The top of each metal sheet 102 has a fixed point between its top and the top plate 101. The edges of adjacent metal sheets 102 are stacked and staggered. The metal sheets 102 adopt a trapezoidal structure with a smaller top and a larger bottom, and the top of the metal sheets 102 is spot-welded to the top plate 101. Notches 103 are provided in the lower part of the front side plate and the rear side plate.

[0033] The protective cover body 1 has a gas distribution assembly 4 fixed to the top plate 101. The gas distribution assembly 4 has distribution holes for gas to pass through. The gas distribution assembly 4 is the same size and shape as the top plate 101. Figures 5 to 8 As shown, the gas distribution assembly 4 is fixed to the protective cover body by a gate-shaped elastic buckle 401. The two ends of the elastic buckle 401 are respectively pressed against the connection points between the top plate 101 and the front and rear walls of the protective cover body 1. The gas distribution assembly 4 includes an upper wire mesh 402, a steel wool ball 403, and a lower wire mesh 404 arranged sequentially from top to bottom. The upper wire mesh 403 is made of 200-mesh steel wire mesh, and the lower wire mesh 404 is made of 100-mesh steel wire mesh.

[0034] The welding torch inlet 2 has a semi-circular structure. A semi-circular baffle 201 is fixed at the welding torch inlet 2. The height of the baffle 201 is greater than that of the top plate 101. A clamp 202 is connected to the upper part of the baffle 201. Both ends of the clamp 202 are fixed to the baffle 201 to form a ring structure with the baffle 201. One end of the clamp 202 is fixedly connected to the baffle 201, and an adjusting bolt is connected between the other end of the clamp and the baffle 201. Figure 3 (omitted). A connecting plate 203 is connected between the baffle 201 and the top plate 101. The connecting plate 203 has an L-shaped structure, and its two ends are welded to the baffle 201 and the top plate 101, respectively.

[0035] like Figure 5 As shown, the argon interface pipe 3 includes a straight short pipe 303, a square pipe 304, and a gas-sealing pipe 305. The square pipe 304 is connected between the straight short pipe 303 and the gas-sealing pipe 305. The straight short pipe 303 is vertically fixed on the top plate 101. A fixing nut 302 is connected between the straight short pipe 303 and the top plate 101. A copper silencer 301 is provided on the inner side of the connection between the top plate 301 and the straight short pipe 303.

[0036] The top plate 101 of the protective cover body in this utility model is made of thin steel plate (a steel plate with a thickness of 0.8-1mm can be selected during actual production). The curvature of the protective cover body 1 can be changed by manual bending to adapt to the curvature of the zirconium tube 9 to be welded.

[0037] Before welding, the protective cover body 1 is attached to the pipe weld. The protective cover body 1 is manually pressed down along the pipe (or held directly by hand). Under this external force, the top plate 101 bends, while the metal plates 102 on both sides contract towards the center, causing the entire protective cover to bend and the opening to form an approximately arc shape. Because the protective cover body 1 is made of thin stainless steel, it is easy to bend and does not deform after bending. Each metal plate 102 overlaps with the previous one. Depending on the pipe diameter, the protective cover is bent with force, increasing the overlap depth of the metal plates 102 to adjust to the pipe curvature. When welding pipes of different diameters, the protective cover is slightly pressed down from the center or from both ends, causing the curvature of the top plate 101 and the arc surfaces formed by the metal plates 102 on both sides to change with the curvature of the pipe to be welded, thus fitting snugly against the curved surface of the pipe.

[0038] The recommended dimensions for the protective cover body 1 are: length 80-230mm, width 50-80mm, and height 20-30mm. It is made entirely of thin stainless steel sheet and is suitable for welding 2-inch and larger zirconium tubes. The metal plates 102 on the left and right sides of the protective cover body 1 are trapezoidal structures with a smaller top and a larger bottom. The metal plates 102 at the head and tail ends are right-angled trapezoids with an upper base of 12-25mm and a lower base of 15-30mm. The metal plate 102 in the middle is an isosceles trapezoid with an upper base of 6-20mm and a lower base of 9-30mm. There are 9 plates on each side.

[0039] A gas distribution assembly 4 is installed inside the protective cover. The gas distribution assembly 4 consists of upper and lower wire meshes and steel wool balls 403 filled between the wire meshes. The steel wool balls 403 are used to disperse and slow down the swirling argon gas introduced from the argon gas interface pipe 3. The upper and lower wire meshes can both fix the steel wool balls 403 and make the steel wool balls evenly distributed, and further slow down and evenly disperse the argon gas entering the protective cover. The gas distribution assembly 4 is pressed into the inside of the top plate 101 by elastic buckles 401 with a gate-shaped structure. The elastic buckles 401 are matched with the size of the protective cover. After installation, the elastic buckles 401 bend under force to fix and compact the wire mesh.

[0040] The protective cover in this embodiment is used as follows: Figure 2As shown, the curvature of the baffle 201 is consistent with the curvature of the welding torch. The welding torch 5 is fixed to the protective cover by the clamp 202. The protective cover body moves forward along the weld seam with the welding torch, protecting the weld seam just completed by the welding torch head. The argon gas pipe 8 is connected to the gas-carrying connector 305 of the argon gas interface pipe 3. Argon gas is introduced into the protective cover body through the argon gas interface pipe 3. After passing through the square connector 304 and the straight short pipe 303, the airflow speed and direction are adjusted. After being silenced by the copper silencer 301, it enters the protective cover. After being decelerated and evenly diffused by the gas distribution component 3, it continuously fills the protective cover, forming a continuous and stable isolation layer, thereby protecting the weld seam. The notches 103 on the front and rear side plates of the protective cover body 1 are located above the weld seam, so the movement of the protective cover will not affect the weld seam.

[0041] This invention has a simple structure and is suitable for welding zirconium tubes of different diameters. It enables argon gas to quickly, steadily, and evenly fill the protective cover, forming a continuous isolation layer to protect the formation and quality of the weld seam of the newly welded zirconium tube.

[0042] The embodiments and descriptions above are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An adjustable argon gas protective cover for zirconium tube welding, comprising a hollow, bottomless protective cover body, the protective cover body including a top plate and a left side plate, a right side plate, a front side plate, and a rear side plate connected to the edge of the top plate, characterized in that: The top plate is made of thin steel plate with a thickness of 0.5-1.5mm. An argon gas interface pipe is connected to the top plate and communicates with the inner cavity of the protective cover body. A welding gun socket is provided on the top plate near the front or rear side plate. The left and right side plates are both composed of sequentially arranged metal sheets. The top of each metal sheet has a fixed point between it and the top plate. The edges of adjacent metal sheets are stacked and staggered.

2. The adjustable argon gas protective cover for zirconium tube welding according to claim 1, characterized in that: The protective cover body has a gas distribution assembly fixed to the top plate. The gas distribution assembly has distribution holes for gas to pass through. The gas distribution assembly is the same size and shape as the top plate.

3. The adjustable argon gas protective cover for zirconium tube welding according to claim 2, characterized in that: The gas distribution component is fixed to the protective cover body by a gate-shaped elastic buckle, with the two ends of the elastic buckle respectively pressing against the connection between the top plate and the front and rear walls of the protective cover body.

4. The adjustable argon gas protective cover for zirconium tube welding according to claim 2, characterized in that: The gas distribution assembly includes an upper wire mesh, a steel wool ball, and a lower wire mesh arranged sequentially from top to bottom.

5. The adjustable argon gas protective cover for zirconium tube welding according to claim 4, characterized in that: The upper layer of wire mesh is made of 200-mesh steel wire mesh, and the lower layer of wire mesh is made of 100-mesh steel wire mesh.

6. The adjustable argon gas protective cover for zirconium tube welding according to claim 1, characterized in that: The welding torch inlet is a semi-circular structure. A semi-circular baffle is fixed at the welding torch inlet. The height of the baffle is greater than that of the top plate. A clamp is connected to the upper part of the baffle. Both ends of the clamp are fixed to the baffle to form a ring structure with the baffle. One end of the clamp is fixedly connected to the baffle, and the other end is connected to the baffle with an adjusting bolt.

7. The adjustable argon gas protective cover for zirconium tube welding according to claim 6, characterized in that: A connecting plate is connected between the baffle and the top plate. The connecting plate has an L-shaped structure, and its two ends are welded to the baffle and the top plate, respectively.

8. The adjustable argon gas protective cover for zirconium tube welding according to claim 1, characterized in that: The argon gas interface pipeline includes a straight short pipe, a square pipe, and a gas-sealing pipe. The square pipe is connected between the straight short pipe and the gas-sealing pipe. The straight short pipe is vertically fixed to the top plate. A fixing nut is connected between the straight short pipe and the top plate. A copper silencer is provided on the inner side of the connection between the top plate and the straight short pipe.

9. The adjustable argon gas protective cover for zirconium tube welding according to claim 1, characterized in that: Both the front and rear side panels have notches at their lower parts.

10. The adjustable argon gas protective cover for zirconium tube welding according to claim 1, characterized in that: The metal sheet adopts a trapezoidal structure with a smaller top and a larger bottom, and the top of the metal sheet is spot-welded to the top plate.

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