A tool for titanium welded pipe

Abstract

This utility model discloses a special tool for welding titanium pipes, belonging to the technical field of titanium pipe processing equipment. The special tool includes a welding mechanism, a sealing mechanism fixedly installed at the front center of the welding mechanism, and a protective mechanism fixedly installed on the inner side of the welding mechanism. The sealing mechanism includes a support frame, a transparent cover provided at the inner center of the support frame, and a sealing strip fixedly installed at the outer end of the support frame. This special tool for welding titanium pipes uses a transparent cover and sealing strip to seal the welding environment, ensuring that the device is always in an argon gas environment during welding of titanium pipes, preventing argon leakage and improving the welding effect. A gas cylinder and gas pump are provided to replenish argon gas, ensuring the device is always filled with argon gas, preventing titanium oxidation during welding. An outer protective cover limits the welding position, making welding more precise and reducing welding marks on the outside, thus improving the device's protective performance.

Description

Technical Field

[0001] This utility model relates to the technical field of titanium pipe processing equipment, and in particular to a special tool for titanium welded pipes. Background Technology

[0002] Titanium and titanium alloys, due to their high specific strength and excellent corrosion resistance, are widely used in condensers of coastal thermal power plants, nuclear power plants, and seawater desalination equipment. They are typically thin-walled with small-diameter openings, manufactured by cold-rolled titanium strips through cold bending and welding using forming molds. The production process of titanium welded pipes encompasses raw material preparation (requiring sandblasting to clean titanium materials with surface oxidation), pipe processing (cutting, sawing, drilling, etc.), welding (commonly using manual welding, automatic welding, TIG welding, etc., requiring inert gas protection to ensure weld purity), finishing (removing burrs and oxides from the weld), quality inspection (appearance, dimensions, physicochemical properties, etc.), and packaging and shipping. Currently, titanium welded pipe production faces numerous challenges at each stage. Regarding the forming molds, using copper molds is costly, and when the surface roughness of the raw titanium strip is low, it is prone to adhesive wear with the titanium strip after pickling or grinding, leaving scratches on the finished product. While engineering plastics can avoid scratches, their low strength and hardness can easily lead to insufficient cold bending of the titanium strip, affecting welding quality. Furthermore, they are not wear-resistant, requiring frequent shutdowns for mold replacement and maintenance. The welding process for titanium welded pipes must be carried out in an argon atmosphere, primarily due to the extremely reactive chemical properties of titanium. At high temperatures (local temperatures can reach thousands of degrees Celsius during welding), titanium readily reacts with oxygen, nitrogen, and hydrogen in the air, generating brittle compounds such as titanium dioxide, titanium nitride, and titanium hydride. These compounds significantly reduce the mechanical properties (such as strength and toughness) and corrosion resistance of the weld joint, leading to defects such as cracks and porosity in the weld, severely affecting the quality and service life of the titanium welded pipe.

[0003] An existing titanium welding pipe special tool typically introduces argon gas to create an argon environment during the welding process. However, in actual use, the sealing of the welding environment is weak, and argon gas is easily lost, causing abnormalities in the welding process. Therefore, we propose a special tool for titanium welding pipes. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a special tool for welding titanium pipes. By setting a transparent cover and sealing strip to seal the welding environment, the device is always in an argon environment when welding titanium pipes, which makes it difficult for argon to leak and improves the welding effect of the device.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A special tool for welding titanium pipes includes a welding mechanism, wherein a sealing mechanism is fixedly installed at the middle of the front end of the welding mechanism, and a protective mechanism is fixedly installed on the inner side of the welding mechanism.

[0007] The sealing mechanism includes a support frame, with a transparent cover at the middle of the inner end of the support frame and a sealing strip fixedly installed at the outer end of the support frame. By setting the transparent cover and the sealing strip, the welding environment is sealed, so that the device is always in an argon environment when welding titanium tubes, making it difficult for argon to leak and improving the welding effect of the device.

[0008] Furthermore, the welding mechanism includes a working box, a support box is provided on the outer side of the working box, a support leg is fixedly installed on the lower side of the support box, a support pipe is fixedly provided on the inner side of the support box, a welding head is provided on the lower front side of the working box, a gas cylinder is provided on the upper end of the support box, an air pump is fixedly connected to the lower end of the gas cylinder, and a connecting pipe is fixedly connected to the lower end of the air pump. By providing the gas cylinder and air pump, argon gas is supplied to the device, so that the inside of the device is always filled with argon gas, making it less likely for titanium to oxidize during welding and improving the welding effect of the device.

[0009] Furthermore, the protective mechanism includes an inner protective ring, an outer protective cover is provided on the upper side of the inner protective ring, and a welding hole is provided on the upper side of the outer protective cover. By setting the inner protective ring to protect the inside of the titanium tube, it is possible to prevent weld scars from remaining inside the titanium tube after welding, which are difficult to clean. By setting the outer protective cover to limit the welding position, the welding of the device is made more precise, while reducing welding marks on the outside and improving the protective performance of the device.

[0010] Furthermore, the support frame is fixedly installed at the front center of the work box, and the sealing strip is connected to the work box through an adhesive. By setting the sealing strip to be connected to the work box through an adhesive, the welding area of ​​the device is in a sealed state, so that external oxygen is not easy to cause the titanium to undergo an oxidation reaction during welding, thereby improving the welding effect of the device.

[0011] Furthermore, the inner protective ring is fixedly installed at the inner end of the support tube.

[0012] Furthermore, the outer protective cover is fixedly installed on the outer end wall of the support box, and the connection method is welding.

[0013] Furthermore, the transparent cover is made of glass.

[0014] Furthermore, the transparent cover and sealing strip form a sealed space with the working box, and the gas tank is connected to the sealed space.

[0015] In summary, this utility model has the following beneficial effects:

[0016] 1. By setting up a transparent cover and sealing strip to seal the welding environment, the device is always in an argon environment when welding titanium tubes, which makes it difficult for argon to leak and improves the welding effect of the device. By setting up gas tanks and gas pumps to replenish argon to the device, the device is always filled with argon, which makes it difficult for titanium to oxidize during welding and improves the welding effect of the device.

[0017] 2. By setting an inner protective ring to protect the inside of the titanium tube, the problem of weld scars inside the titanium tube after welding is prevented and difficult to clean. By setting an outer protective cover to limit the welding position, the welding of the device is more precise, while reducing welding marks on the outside and improving the protective performance of the device. By setting a sealing strip and connecting it to the working box with an adhesive, the welding area of ​​the device is kept in a sealed state, so that external oxygen does not easily cause the titanium to oxidize during welding, thus improving the welding effect of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure in this embodiment;

[0019] Figure 2 This is a three-dimensional structural diagram of the welding mechanism in this embodiment;

[0020] Figure 3 This is a three-dimensional structural diagram of the sealing mechanism in this embodiment;

[0021] Figure 4 This is a three-dimensional structural diagram of the protective mechanism in this embodiment;

[0022] Figure 5 This is a three-dimensional structural schematic diagram of a portion of the welding mechanism in this embodiment.

[0023] In the diagram, 1. Welding mechanism; 101. Working box; 102. Support box; 103. Support leg; 104. Support pipe; 105. Welding head; 106. Air tank; 107. Air pump; 108. Connecting pipe; 2. Sealing mechanism; 201. Support frame; 202. Transparent cover; 203. Sealing strip; 3. Protective mechanism; 301. Inner protective ring; 302. Outer protective cover; 303. Welding hole. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific part, respectively.

[0026] Reference Figure 1-3 As shown, a special tool for titanium welded pipes in a preferred embodiment of this utility model includes a welding mechanism 1, a sealing mechanism 2 fixedly installed at the middle of the front end of the welding mechanism 1, and a protective mechanism 3 fixedly installed on the inner side of the welding mechanism 1.

[0027] The sealing mechanism 2 includes a support frame 201. A transparent cover 202 is provided in the middle of the inner end of the support frame 201, and a sealing strip 203 is fixedly provided in the outer end of the support frame 201. The transparent cover 202 is made of glass. By making the transparent cover 202 of glass, it can withstand a certain high temperature, while allowing the personnel on the outside to observe the internal equipment, preventing problems that are not easy to detect when the device is damaged, and improving the convenience of the device during use. The transparent cover 202 and the sealing strip 203 form a sealed space with the working box 101. The gas tank 106 is connected to the sealed space. By setting the transparent cover 202 and the sealing strip 203 to seal the welding environment, the device is always in an argon environment when welding titanium tubes, making it difficult for argon to leak and improving the welding effect of the device.

[0028] Reference Figure 1-5 As shown, the welding mechanism 1 includes a working box 101, a support box 102 is provided on the outer side of the working box 101, a support leg 103 is fixedly installed on the lower side of the support box 102, a support pipe 104 is fixedly provided on the inner side of the support box 102, a welding head 105 is provided on the lower front side of the working box 101, a gas tank 106 is provided on the upper end of the support box 102, a gas pump 107 is fixedly connected to the lower end of the gas tank 106, and a connecting pipe 108 is fixedly connected to the lower end of the gas pump 107. By setting up the gas tank 106 and the gas pump 107, argon gas is supplied to the device, so that the inside of the device is always filled with argon gas, making it less likely for titanium to oxidize during welding and improving the welding effect of the device.

[0029] Reference Figure 1-4 As shown, the protective mechanism 3 includes an inner protective ring 301, an outer protective cover 302 is provided on the upper side of the inner protective ring 301, and a welding hole 303 is provided on the upper side of the outer protective cover 302. The inner protective ring 301 is fixedly installed on the inner end of the support tube 104, and the outer protective cover 302 is fixedly installed on the outer end wall of the support box 102. The connection method is welding. By setting the inner protective ring 301, the inside of the titanium tube is protected, preventing the presence of weld scars inside the titanium tube after welding, which are difficult to clean. By setting the outer protective cover 302, the welding position is limited, making the welding of the device more precise, while reducing welding marks on the outside and improving the protective performance of the device.

[0030] Reference Figure 2-4As shown, the support frame 201 is fixedly installed in the middle of the front end of the working box 101. The sealing strip 203 is connected to the working box 101 by an adhesive. By setting the sealing strip 203 to be connected to the working box 101 by an adhesive, the welding area of ​​the device is sealed, so that external oxygen is not easy to cause the titanium to oxidize during welding, thereby improving the welding effect of the device.

[0031] Specific implementation process: The titanium tube to be welded is inserted into the device through the support tube 104, aligning the welding area with the welding head 105 at the lower end of the working box 101. Simultaneously, the inner protective ring 301 is fitted against the inner wall of the titanium tube, and the outer protective cover 302 covers the outer side of the titanium tube, exposing the welding position through the welding hole 303. The sealing condition is checked, ensuring that the transparent cover 202 at the front end of the support frame 201 is in contact with the working box 101, and the sealing strip 203 is tightly connected to the working box 101 via adhesive, forming a sealed space. It is confirmed that there is sufficient argon gas in the gas tank 106, and that the gas pump 107 and connecting pipe 108 are properly connected to ensure that argon gas can smoothly enter the sealed space. The gas pump 107 is started, and the argon gas in the gas tank 106 is introduced into the sealed space formed by the transparent cover 202, sealing strip 203, and working box 101 through the connecting pipe 108. Simultaneously, argon gas fills the support tube 104 and the interior of the titanium tube, ensuring the welding area is completely in an argon environment. Workers observe the position of the titanium tube through a transparent glass cover 202. Once confirmed, the welding head 105 is activated, and the titanium tube is welded through the welding hole 303 on the outer protective cover 302. During welding, the inner protective ring 301 prevents weld spatter from forming inside the titanium tube, while the outer protective cover 302 limits the welding area to reduce external welding marks. Simultaneously, the sealing strip 203 ensures that argon gas does not easily leak, continuously maintaining an oxygen-free environment. After welding, the welding head 105 is closed, and the gas pump 107 is turned off after the titanium tube cools, completing the welding operation. During welding, the support tube 104 is equipped with an external traction device for the titanium tube, enabling a streamlined welding process. After the external traction device is connected, the welding space remains sealed.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification 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 claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A special tool for welding titanium pipes, characterized in that: It includes a welding mechanism (1), a sealing mechanism (2) is fixedly installed at the middle of the front end of the welding mechanism (1), and a protective mechanism (3) is fixedly installed on the inner side of the welding mechanism (1). The sealing mechanism (2) includes a support frame (201), a transparent cover (202) is provided at the middle of the inner end of the support frame (201), and a sealing strip (203) is fixedly installed at the outer end of the support frame (201).

2. The special tool for titanium welded pipes according to claim 1, characterized in that: The welding mechanism (1) includes a work box (101), a support box (102) is provided on the outer side of the work box (101), a support leg (103) is fixedly installed on the lower side of the support box (102), a support pipe (104) is provided on the inner side of the support box (102), a welding head (105) is provided on the lower front side of the work box (101), an air tank (106) is provided on the upper end of the support box (102), an air pump (107) is fixedly connected to the lower end of the air tank (106), and a connecting pipe (108) is fixedly connected to the lower end of the air pump (107).

3. The special tool for titanium welded pipes according to claim 2, characterized in that: The protective mechanism (3) includes an inner protective ring (301), an outer protective cover (302) is provided on the upper side of the inner protective ring (301), and a welding hole (303) is provided on the upper side of the outer protective cover (302).

4. A special tool for titanium welding pipes according to claim 2, characterized in that: The support frame (201) is fixedly installed in the middle of the front end of the work box (101), and the sealing strip (203) is connected to the work box (101) by a glue.

5. A special tool for titanium welding pipes according to claim 3, characterized in that: The inner protective ring (301) is fixedly installed at the inner end of the support tube (104).

6. A special tool for titanium welded pipes according to claim 3, characterized in that: The outer protective cover (302) is fixedly installed on the outer end wall of the support box (102) and the connection method is welding.

7. A special tool for titanium welded pipes according to claim 1, characterized in that: The transparent cover (202) is made of glass.

8. A special tool for titanium welded pipes according to claim 2, characterized in that: The transparent cover (202) and the sealing strip (203) form a sealed space with the working box (101), and the gas tank (106) is connected to the sealed space.

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