Titanium tube and tube plate corner joint welding protection device

Abstract

The utility model relates to the technical field of welding, and discloses a titanium tube and tube plate corner joint welding protection device which comprises a gas conveying tube, the outer wall of the gas conveying tube is fixedly connected with two sets of plugs which are symmetrically arranged, and the outer wall, located between the two sets of plugs, of the gas conveying tube is provided with a plurality of sets of exhaust holes which are distributed in an array mode. Adjusting assemblies are arranged on the opposite end faces of the two plugs, each adjusting assembly comprises a sliding groove, the sliding grooves are formed in the end faces of the plugs, sliding rods are slidably connected into the sliding grooves, the sliding rods penetrate through the outer walls of the plugs and are slidably connected to the outer walls of the plugs, and arc-shaped opening plates are fixedly connected to the ends of the sliding rods. According to the titanium tube and tube plate corner joint welding protection device, the rotating wheel is rotated to move along the outer wall of the gas conveying tube, so that the circular ring is driven to move synchronously, movement of the circular ring is converted into sliding of the sliding rod in the sliding groove through the traction plate, the annular silica gel ring can adapt to titanium tubes with different tube diameters, and the reliability of the sealing effect is ensured.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, specifically a welding protection device for corner joints between titanium tubes and tube sheets. Background Technology

[0002] The tube-to-tube sheet weld joint is a critical structure in shell-and-tube heat exchangers, and the quality of the weld is particularly important for the service life of the equipment. With the steady and healthy development of my country's chemical and energy industries, the demand for non-ferrous metal pressure vessels is gradually increasing. Zirconium materials, due to their excellent corrosion resistance, are widely used in the industry.

[0003] According to the publicized protective device for welding zirconium tube to tube sheet corner joint (Announcement No.: CN213053400U), after the tail plug and the middle plug are inserted into the zirconium tube to be welded, the three form a temporary local protective space. Inert protective gas is introduced from the end of the gas inlet pipe and discharged from the gas outlet. After passing through the flow equalization mesh, the inert gas is further evenly softened, so that the inert gas forms a local protective atmosphere inside the tube, isolating the outside air. This achieves the effect of effectively protecting the inner wall of the tube and preventing oxidation during the welding process of zirconium tube to tube sheet corner joint. The inner wall of the zirconium tube will not turn blue or gray, thus meeting the appearance inspection requirements and corrosion resistance performance of zirconium materials.

[0004] Although the aforementioned welding protection device mentions that the outer diameter of the tail plug is slightly smaller than that of the middle plug in order to insert the zirconium tube, it cannot flexibly adapt to zirconium tubes of various diameters for different specifications, resulting in the protection device not being fully compatible and affecting the protection effect. Utility Model Content

[0005] The purpose of this invention is to provide a welding protection device for the corner joint of titanium tubes and tube sheets, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a welding protection device for titanium tube and tube sheet corner joints, comprising a gas supply pipe, wherein two sets of symmetrically arranged plugs are fixedly connected to the outer wall of the gas supply pipe, and multiple arrayed exhaust holes are opened on the outer wall of the gas supply pipe between the two sets of plugs. An adjustment component is provided on the opposite end faces of the two sets of plugs, the adjustment component comprising a sliding groove, the sliding groove being opened on the end face of the plug, a sliding rod being slidably connected inside the sliding groove, the sliding rod passing through and slidably connected to the outer wall of the plug, an arc-shaped support plate being fixedly connected to the end of the sliding rod, and an annular silicone ring being fixedly connected to the side wall of the plug.

[0007] Preferably, a flow equalization net is fixedly connected between the two sets of plugs, and multiple sets of arrayed flow dividers are fixedly connected to the inner wall of the flow equalization net.

[0008] Preferably, the surface of the diverter plate has multiple arrays of distributed vent holes.

[0009] Preferably, the diverter plate is M-shaped.

[0010] Preferably, a traction plate is hinged to the side wall of the slide rod, a ring is hinged to the end of the traction plate, and a wheel is rotatably connected to the end face of the ring. The wheel is threadedly connected to the outer wall of the gas pipeline.

[0011] Preferably, the arc-shaped support plate is in contact with the inner wall of the annular silicone ring.

[0012] Compared with the prior art, this utility model provides a welding protection device for the corner joint of titanium tube and tube sheet, which has the following beneficial effects:

[0013] 1. The titanium tube and tube sheet corner joint welding protection device, by rotating the rotating wheel, moves the rotating wheel along the outer wall of the gas transmission pipe, thereby driving the ring to move synchronously. The movement of the ring is converted into the sliding of the slide bar in the slide groove by the traction plate, which can make the annular silicone ring adapt to titanium tubes of different diameters and ensure the reliability of the sealing effect.

[0014] 2. The welding protection device for the titanium tube and tube sheet corner joint uses a flow equalization network to initially distribute the protective gas evenly, and a flow divider further refines and adjusts the gas flow. The two work together to ensure that the protective gas discharged from the gas supply pipe can reach the welding area in a uniform and stable state, providing a good protective atmosphere for the welding process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the gas pipeline structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the disassembled structure of the adjustment component of this utility model;

[0018] Figure 4 This is a schematic diagram of the disassembled structure of the flow equalization network and flow divider of this utility model.

[0019] In the diagram: 1. Gas supply pipe; 2. Plug; 3. Exhaust port; 4. Adjustment component; 41. Slide groove; 42. Slide rod; 43. Arc-shaped expansion plate; 44. Annular silicone ring; 45. Traction plate; 46. Circular ring; 47. Rotary wheel; 5. Flow equalization net; 51. Flow divider plate; 52. Vent hole. Detailed Implementation

[0020] like Figures 1-2As shown, this utility model provides a technical solution: a welding protection device for titanium tube and tube sheet corner joint, including a gas supply pipe 1. The gas supply pipe 1 is used to supply protective gas inside the titanium tube, providing a protective gas environment for the welding area and preventing oxidation of the metal during welding. Two sets of symmetrically arranged plugs 2 are fixedly connected to the outer wall of the gas supply pipe 1. The two sets of plugs 2 are used to insert into the inside of the titanium tube to seal the titanium tube and prevent the protective gas from leaking from the inside of the titanium tube. Multiple arrayed exhaust holes 3 are opened on the outer wall of the gas supply pipe 1 between the two sets of plugs 2. The exhaust holes 3 discharge the protective gas in the gas supply pipe 1 into the inside of the titanium tube sealed by the plugs 2.

[0021] like Figures 2-3 As shown, adjusting components 4 are provided on the opposite end faces of the two sets of plugs 2. The adjusting components 4 include a sliding groove 41, which is opened on the end face of the plug 2. A sliding rod 42 is slidably connected inside the sliding groove 41. The sliding rod 42 passes through and is slidably connected to the outer wall of the plug 2. The sliding groove 41 provides a sliding track for the sliding rod 42, so that the sliding rod 42 can move in a specific direction, ensuring the stability and accuracy of the movement. An arc-shaped support plate 43 is fixedly connected to the end of the sliding rod 42. An annular silicone ring 44 is fixedly connected to the side wall of the plug 2. The arc-shaped support plate 43 fits against the inner wall of the annular silicone ring 44. The movement of the sliding rod 42 causes the arc-shaped support plate 43 to move to the outside of the plug 2. The arc-shaped support plate 43 supports the inner wall of the annular silicone ring 44. Since the annular silicone ring 44 has good elasticity and flexibility, it can deform under the action of the arc-shaped support plate 43 and can fit tightly against the inside of titanium tubes of different diameters.

[0022] like Figures 2-3 As shown, a traction plate 45 is hinged to the side wall of the slide rod 42, and a ring 46 is hinged to the end of the traction plate 45. A rotating wheel 47 is rotatably connected to the end face of the ring 46, and the rotating wheel 47 is threadedly connected to the outer wall of the gas transmission pipe 1. By rotating the rotating wheel 47, using the principle of threaded transmission, the rotating wheel 47 moves along the outer wall of the gas transmission pipe 1, thereby driving the ring 46 to move synchronously. The movement of the ring 46 is converted into the sliding of the slide rod 42 in the sliding groove 41 by the traction plate 45, which allows the annular silicone ring 44 to adapt to titanium pipes of different diameters, ensuring the reliability of the sealing effect.

[0023] like Figure 1 , Figure 4As shown, a flow equalization mesh 5 is fixedly connected between the two sets of plugs 2. The flow equalization mesh 5 ensures that the protective gas discharged from the gas supply pipe 1 is evenly distributed, guaranteeing that the protective gas can uniformly cover the welding area. Multiple arrayed flow divider plates 51 are fixedly connected to the inner wall of the flow equalization mesh 5. Multiple arrayed vent holes 52 are formed on the surface of the flow divider plates 51, which are M-shaped. The M-shaped flow divider plates 51 allow the gas to change direction and speed during flow, further refining and adjusting the gas flow. Working in conjunction with the flow equalization mesh 5, this ensures that the protective gas discharged from the gas supply pipe 1 reaches the welding area in a uniform and stable state, providing a good protective atmosphere for the welding process.

[0024] In this invention, during use, the titanium tube and tube sheet are first preliminarily assembled according to welding requirements. Then, the two sets of plugs 2 of the welding protection device are inserted into the interior of the titanium tube, ensuring that the plugs 2 are in the appropriate position. Next, according to the diameter of the titanium tube, the rotating wheel 47 is rotated. Since the rotating wheel 47 is threadedly connected to the outer wall of the gas transmission pipe 1, the rotating wheel 47 moves along the outer wall of the gas transmission pipe 1 when it rotates, thereby driving the ring 46 to move synchronously. The ring 46 transmits the movement to the slide rod 42 through the traction plate 45, causing the slide rod 42 to slide in the slide groove 41, pushing the arc-shaped expansion plate 43 to move outward of the plug 2, supporting the inner wall of the annular silicone ring 44. The annular silicone ring 44 deforms under the action of the arc-shaped expansion plate 43, tightly adhering to the inner wall of the titanium tube, forming a good sealing effect, preventing the protective gas from leaking and the outside air from entering.

[0025] After the sealing work is completed, protective gas is supplied to the interior of the titanium tube through the gas supply pipe 1. The protective gas is discharged through the exhaust port 3 and enters the interior space of the titanium tube sealed by the plug 2. The discharged protective gas first passes through the M-shaped diverter plate 51 on the inner wall, which changes the direction and speed, disrupts the original flow state of the gas, and initially disturbs and mixes the gas. Then, it passes through the flow equalization net 5 to further evenly distribute the gas, ensuring that the protective gas covers the welding area in a more uniform and stable state, providing a good protective atmosphere for the corner joint welding process between the titanium tube and the tube sheet.

[0026] After welding is completed, the rotating wheel 47 is rotated in the opposite direction to restore the annular silicone ring 44 to its original shape, and then the welding protection device is removed from the titanium tube.

[0027] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A welding protection device for a titanium tube to a tube sheet corner joint, comprising a gas transmission pipe (1), characterized in that: The outer wall of the gas supply pipe (1) is fixedly connected to two sets of symmetrically arranged plugs (2). The outer wall of the gas supply pipe (1) located between the two sets of plugs (2) has multiple arrayed exhaust holes (3). An adjustment component (4) is provided on the opposite end face of the two sets of plugs (2). The adjustment component (4) includes a slide groove (41). The slide groove (41) is opened on the end face of the plug (2). A slide rod (42) is slidably connected inside the slide groove (41). The slide rod (42) passes through and is slidably connected to the outer wall of the plug (2). An arc-shaped support plate (43) is fixedly connected to the end of the slide rod (42). An annular silicone ring (44) is fixedly connected to the side wall of the plug (2).

2. The welding protection device for the titanium tube and tube sheet corner joint according to claim 1, characterized in that: A flow equalization net (5) is fixedly connected between the two sets of plugs (2), and multiple sets of arrayed flow dividers (51) are fixedly connected to the inner wall of the flow equalization net (5).

3. The welding protection device for titanium tube and tube sheet corner joints according to claim 2, characterized in that: The surface of the flow divider (51) has multiple arrays of distributed vent holes (52).

4. The welding protection device for titanium tube and tube sheet corner joints according to claim 2, characterized in that: The diverter plate (51) is M-shaped.

5. The welding protection device for the titanium tube and tube sheet corner joint according to claim 1, characterized in that: The slide bar (42) has a traction plate (45) hinged to its side wall, and a ring (46) is hinged to the end of the traction plate (45). A wheel (47) is rotatably connected to the end face of the ring (46), and the wheel (47) is threadedly connected to the outer wall of the gas pipe (1).

6. The welding protection device for the titanium tube and tube sheet corner joint according to claim 1, characterized in that: The arc-shaped support plate (43) is in contact with the inner wall of the annular silicone ring (44).

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