Welding device for titanium alloy pipe

Abstract

The invention provides a welding device for a titanium alloy pipe, and belongs to the technical field of titanium alloy pipe welding, the welding device comprises a bottom plate, a gas storage tank, a first piston plate, a second piston plate, a pull rod, two positioning assemblies and a limiting assembly, and the two positioning assemblies are installed on the upper portion of the bottom plate; the air storage tank is used for positioning two sets of titanium alloy pipes to be welded, the first piston plate and the second piston plate are arranged on one side of the air storage tank, the first piston plate is attached to the second piston plate, one end of the pull rod penetrates through the second piston plate and is movably connected with the first piston plate, and the other end of the pull rod is movably connected with the second piston plate. And the pull rod is fixedly connected with the second piston plate. Compared with the prior art, when the titanium alloy pipe is subjected to gas shield welding, inert gas can be automatically filled into the titanium alloy pipe, the use amount of the inert gas can be effectively reduced, and the waste phenomenon of the inert gas is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of titanium alloy pipe welding, in particular to a welding device for titanium alloy pipes. Background Art

[0002] In order to protect the welding joint from oxidation, the titanium alloy tube is usually welded by gas shielded welding process. Before the gas shielded welding operation, inert gas is usually filled into the titanium alloy tube to isolate oxygen and avoid oxidation of the metal at the root of the weld and slag, thereby ensuring the welding quality.

[0003] In order to prevent the inert gas from escaping from the end of the titanium alloy tube when entering the inside of the titanium alloy tube, the two ends of the two titanium alloy tubes to be welded need to be sealed with sealing parts before filling with inert gas. However, when the welded titanium alloy tube is long, the space blocked by the two sealing parts is larger, resulting in a larger amount of inert gas to be filled. Once the amount of inert gas filled is large, it is bound to result in a large waste of inert gas. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a welding device for titanium alloy tubes.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A welding device for a titanium alloy tube comprises a bottom plate, an air storage box, a first piston plate, a second piston plate, a pull rod, a positioning assembly and a limit assembly. The positioning components are provided with two groups, and the two groups of positioning components are installed on the upper part of the bottom plate, and are used to position two groups of titanium alloy pipes to be welded respectively. The first piston plate and the second piston plate are arranged on one side of the air storage box, and the first piston plate is in contact with the second piston plate. One end of the pull rod passes through the second piston plate and is movably connected to the first piston plate, and the pull rod is fixedly connected to the second piston plate. The air storage box is arranged at the upper edge of the bottom plate, a flexible air pipe is arranged on one side of the air storage box, and one end of the flexible air pipe away from the air storage box passes through the first piston plate and communicates with the area between the first piston plate and the second piston plate. The limiting assembly is arranged inside the first piston plate. When the first piston plate moves along the inside of one group of titanium alloy tubes to a position close to the welding seam, the limiting assembly limits the first piston plate.

[0006] As a further improvement of the present invention: a second through hole is provided at the center of the first piston plate, a first through hole connected to the second through hole is provided at the center of one side of the first piston plate facing the second piston plate, and the diameter of the first through hole is smaller than the diameter of the second through hole. A notch is further provided on a side of the first piston plate facing the second piston plate. The notch is distributed radially along the first piston plate and communicates with the first through hole. One end of the pull rod passes through the first piston plate and extends from the first through hole to the inside of the second through hole. A protrusion is fixedly provided on the side wall of the rod body of the pull rod located inside the second through hole. The protrusion is perpendicular to the pull rod.

[0007] As a further improvement of the present invention: a channel is provided in the first piston plate, the channel is distributed radially along the first piston plate, one end of the channel extends to the circumferential side of the first piston plate, and the other end is connected to the second through hole. The limiting assembly includes a rotating rod, a square block, a limiting top rod and an arc-shaped protrusion. One end of the rotating rod is rotatably connected to the wall of the second through hole, and the other end is fixedly connected to the square block. The rotating rod is distributed axially along the first piston plate, and the arc-shaped protrusion is arranged on the outside of the rotating rod. One end of the limiting push rod is located inside the channel, and the other end extends to the inside of the second through hole and contacts with the rotating rod. The end position of the rod body of the pull rod located inside the second channel is provided with a square socket adapted to the square block.

[0008] As a further improvement of the present invention: a telescopic support rod is further provided on one side of the air storage box, and one end of the telescopic support rod away from the air storage box is connected to the first piston plate.

[0009] As a further improvement of the present invention: the two groups of positioning components have the same structure, both comprising an annular positioning seat and a locking bolt, the annular positioning seat is fixedly mounted on the upper portion of the base plate, and the locking bolt is mounted on the side wall of the annular positioning seat.

[0010] As a further improvement of the present invention: a pull handle is fixedly provided at one end of the pull rod away from the first piston plate, and an indication component is also provided on the side wall of the pull rod, and the indication component is used to indicate the moving position of the first piston plate inside the titanium alloy tube.

[0011] As a further improvement of the present invention: the indicating assembly includes a first telescopic rod and a second telescopic rod, One end of the second telescopic rod is connected to the side wall of the pull rod, and the other end is connected to the first telescopic rod. The second telescopic rod and the pull rod are perpendicular to each other, and the first telescopic rod and the pull rod are parallel to each other.

[0012] Compared with the prior art, the present invention has the following beneficial effects: In the embodiment of the present invention, when it is necessary to perform gas shielded welding on the titanium alloy tube, the two groups of titanium alloy tubes to be welded can be positioned by the two groups of positioning components respectively. After positioning, one end of the two groups of titanium alloy tubes are connected to form a welding seam, and then the pull rod is pulled, and the pull rod drives the first piston plate and the second piston plate to move along the inside of one group of titanium alloy tubes. At this time, the flexible air pipe is stretched adaptively under tension. When the first piston plate moves to a position close to the welding seam, the limiting component limits the first piston plate, and one end of the pull rod is separated from the first piston plate and drives the second piston plate to continue to move, and the second piston plate moves away from the first The piston plate enters another group of titanium alloy tubes. At this time, the second piston plate can draw the inert gas inside the gas storage box through the flexible air pipe to between the first piston plate and the second piston plate through the negative pressure effect when it is away from the first piston plate, thereby isolating oxygen and avoiding oxidation of the metal at the root of the weld and the resulting slag phenomenon, thereby ensuring the welding quality. Compared with the existing technology, when performing gas shielded welding on titanium alloy tubes, inert gas can be automatically filled into the titanium alloy tubes, and the use of inert gas can be effectively reduced, thereby reducing the waste of inert gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a welding device for titanium alloy tube; Figure 2 It is a structural schematic diagram of a first piston plate in a welding device for a titanium alloy tube; Figure 3 It is a schematic diagram of the structure inside the first piston plate in a welding device for titanium alloy tube; Figure 4 It is a structural schematic diagram of a pull rod in a welding device for titanium alloy tubes; Figure 5 for Figure 3 A magnified schematic diagram of the middle A area; In the figure: 10-bottom plate, 20-air storage box, 201-flexible air pipe, 202-telescopic support rod, 30-first piston plate, 301-channel, 302-first through hole, 303-second through hole, 304-notch, 40-second piston plate, 50-pull rod, 501-handle, 502-bump, 503-square jack, 60-indicator assembly, 601-first telescopic rod, 602-second telescopic rod, 70-positioning assembly, 701-annular positioning seat, 702-locking bolt, 80-limiting assembly, 801-rotating rod, 802-square block, 803-limiting top rod, 804-arc-shaped protrusion. DETAILED DESCRIPTION

[0014] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0015] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0016] See also Figure 1 as well as Figure 2 The present embodiment provides a welding device for titanium alloy tubes, including a base plate 10, an air storage box 20, a first piston plate 30, a second piston plate 40, a pull rod 50, a positioning assembly 70 and a limit assembly 80. The positioning assembly 70 is provided with two groups, and the two groups of positioning assemblies 70 are installed on the upper part of the base plate 10, and are used to position two groups of titanium alloy tubes to be welded respectively. The first piston plate 30 and the second piston plate 40 are arranged on one side of the air storage box 20, and the first piston plate 30 is attached to the second piston plate 40. One end of the pull rod 50 passes through the second piston plate 40 and is attached to the first piston plate 30 is movably connected, the pull rod 50 is fixedly connected to the second piston plate 40, the air storage box 20 is arranged at the upper edge of the base plate 10, and a flexible air pipe 201 is arranged on one side of the air storage box 20, and the end of the flexible air pipe 201 away from the air storage box 20 passes through the first piston plate 30 and is connected to the area between the first piston plate 30 and the second piston plate 40, and the limiting assembly 80 is arranged inside the first piston plate 30. When the first piston plate 30 moves along one of the groups of titanium alloy tubes to a position close to the welding seam, the limiting assembly 80 limits the first piston plate 30.

[0017] When it is necessary to perform gas shielded welding on the titanium alloy tube, the two groups of titanium alloy tubes to be welded can be positioned by two groups of positioning components 70 respectively. After positioning, one end of the two groups of titanium alloy tubes are connected to form a welding seam, and then the pull rod 50 is pulled, and the pull rod 50 drives the first piston plate 30 and the second piston plate 40 to move along the inside of one of the groups of titanium alloy tubes. At this time, the flexible air pipe 201 is stretched adaptively under tension. When the first piston plate 30 moves to a position close to the welding seam, the limiting component 80 limits the first piston plate 30, and one end of the pull rod 50 is separated from the first piston plate 30 and drives the second piston plate 40 to continue to move. The second piston plate 40 moves away from the first piston plate 30 and enters the inside of another group of titanium alloy tubes. At this time, the second piston plate 40 can extract the inert gas inside the air storage box 20 through the flexible air pipe 201 to between the first piston plate 30 and the second piston plate 40 through the negative pressure generated when it moves away from the first piston plate 30, thereby isolating oxygen to avoid oxidation of the metal at the root of the welding seam and the occurrence of slag, thereby ensuring the welding quality.

[0018] See also Figure 2 , Figure 3 as well as Figure 4 In one embodiment, a second through hole 303 is provided at the center position of the first piston plate 30, a first through hole 302 connected to the second through hole 303 is provided at the center position of the side of the first piston plate 30 facing the second piston plate 40, the diameter of the first through hole 302 is smaller than the diameter of the second through hole 303, a notch 304 is also provided on the side of the first piston plate 30 facing the second piston plate 40, the notch 304 is radially distributed along the first piston plate 30, the notch 304 is connected to the first through hole 302, one end of the pull rod 50 passes through the first piston plate 40 and extends from the first through hole 302 to the inside of the second through hole 303, a protrusion 502 is fixedly provided on the side wall of the rod body of the pull rod 50 located inside the second through hole 303, and the protrusion 502 and the pull rod 50 are perpendicular to each other.

[0019] Initially, the first piston plate 30 and the second piston plate 40 fit each other, one end of the pull rod 50 extends from the first through hole 302 to the inside of the second through hole 303, the protrusion 502 acts on the boss formed between the first through hole 302 and the second through hole 303 and is arranged horizontally, the protrusion 502 and the notch 304 are misaligned with each other, when the two groups of positioning components 70 respectively position the two groups of titanium alloy tubes to be welded, the staff pulls the pull rod 50, when the pull rod 50 is pulled, the protrusion 502 acts on the boss between the first through hole 302 and the second through hole 303, thereby driving the first piston plate 30 and the second piston plate 40 to move along the inside of one of the titanium alloy tubes, when the first piston plate 30 moves to the position close to the welding seam When the pull rod 50 is in the position, the staff can rotate the pull rod 50 90°. When the pull rod 50 is rotated 90°, the protrusion 502 is driven to rotate 90°, so that the protrusion 502 is correspondingly rotated to the inside of the notch 304. During this process, the limiting assembly 80 limits the first piston plate 30. Then the staff continues to pull the pull rod 50, and the pull rod 50 pulls the protrusion 502 out of the notch 304. At the same time, the pull rod 50 drives the second piston plate 40 from the inside of the current titanium alloy tube into the inside of another group of titanium alloy tubes. The second piston plate 40 is away from the first piston plate 30, so that the inert gas inside the air storage box 20 is drawn to between the first piston plate 30 and the second piston plate 40 through the flexible air pipe 201, so as to achieve the isolation of oxygen in the internal position of the weld.

[0020] See also Figure 2 , Figure 3 , Figure 4 as well as Figure 5 In one embodiment, a channel 301 is provided in the first piston plate 30, and the channel 301 is radially distributed along the first piston plate 301. One end of the channel 301 extends to the circumferential side surface of the first piston plate 301, and the other end is connected to the second through hole 303. The limiting assembly 80 includes a rotating rod 801, a square block 802, a limiting push rod 803 and an arc-shaped protrusion 804. One end of the rotating rod 801 is rotatably connected to the hole wall of the second through hole 303, and the other end is fixedly connected to the square block 802. The rotating rod 801 is axially distributed along the first piston plate 30, and the arc-shaped protrusion 804 is arranged outside the rotating rod 801. One end of the limiting push rod 803 is located inside the channel 301, and the other end extends to the inside of the second through hole 303 and contacts with the rotating rod 801. The end position of the rod body of the pull rod 50 located inside the second channel 303 is provided with a square socket 503 adapted to the square block 802.

[0021] Initially, the protrusion 502 acts on the boss formed between the first through hole 302 and the second through hole 303 and is arranged horizontally. The protrusion 502 and the notch 304 are offset from each other, and the square block 802 is inserted into the square hole 503. When the first piston plate 30 moves to a position close to the welding seam, the pull rod 50 is rotated 90°. On the one hand, the pull rod 50 drives the protrusion 502 to rotate 90° to rotate the protrusion 502 to the corresponding position inside the notch 304. On the other hand, the pull rod 50 can also drive the rotating rod 801 to rotate through the cooperation of the square socket 503 and the square block 802. When the rotating rod 801 rotates, it drives the arc-shaped protrusion When the arc-shaped protrusion 804 rotates, it pushes the limiting push rod 803 so that the limiting push rod 803 moves along the channel 301 to the outside of the first piston plate 30. When the limiting push rod 803 moves outward, it pushes against the inner wall of the current titanium alloy tube, thereby limiting the first piston plate 30. After the first piston plate 30 is limited, as the pull rod 50 continues to be pulled, the pull rod 50 brings the protrusion 502 out of the notch 304. At the same time, the pull rod 50 drives the second piston plate 40 away from the first piston plate 30, thereby extracting the inert gas inside the air storage box 20 to the position corresponding to the welding seam inside the two groups of titanium alloy tubes, thereby isolating oxygen. After the two groups of titanium alloy tubes are welded, the staff can push the pull rod 50, and the pull rod 50 drives the second piston plate 40 to approach the first piston plate 30, and then the inert gas between the second piston plate 40 and the first piston plate 30 is compressed back to the inside of the gas storage box 20 through the flexible air pipe 201, so as to realize the recycling of the inert gas. When the second piston plate 40 moves in the opposite direction to be in contact with the first piston plate 30, one end of the pull rod 50 extends into the second through hole 303 through the first through hole 302, and the protrusion 502 enters the second through hole 303 through the notch 304, and the square block 802 is inserted into the square plug hole 503. Inside, the staff then rotates the pull rod 50 in the opposite direction by 90°, thereby driving the rotating rod 801 and the arc-shaped protrusion 804 to rotate in the opposite direction by 90°, and the arc-shaped protrusion 804 rotates away from one end of the limiting push rod 803 to release the supporting state of the limiting push rod 803. After the supporting state of the limiting push rod 803 is released, the first piston plate 30 is no longer limited. Then, the pull rod 50 is continued to be pushed, and the pull rod 50 drives the second piston plate 40 and the first piston plate 30 to move in the opposite direction together, so that the first piston plate 40 and the second piston plate 30 are moved out from the inside of the titanium alloy tube together, thereby realizing the reset of the first piston plate 40 and the second piston plate 30.

[0022] See also Figure 1 In one embodiment, a telescopic support rod 202 is further provided on one side of the air storage box 20 , and one end of the telescopic support rod 202 away from the air storage box 20 is connected to the first piston plate 30 .

[0023] By setting the telescopic support rod 202, support can be provided for the first piston plate 30, the second piston plate 40 and the pull rod 50. When the pull rod 50 is pulled and thus drives the first piston plate 30 and the second piston plate 40 to move along the inside of the titanium alloy tube, the telescopic support rod 202 adaptively extends.

[0024] See also Figure 1 In one embodiment, the two groups of positioning assemblies 70 have the same structure, both including an annular positioning seat 701 and a locking bolt 702. The annular positioning seat 701 is fixedly mounted on the upper part of the base plate 10, and the locking bolt 702 is mounted on the side wall of the annular positioning seat 701.

[0025] The titanium alloy tubes to be welded are respectively inserted into the two groups of annular positioning seats 701. After the ends of the two groups of titanium alloy tubes are connected and a welding seam is formed, the locking bolts 702 on the two groups of annular positioning seats 701 are screwed, and the locking bolts 702 are used to support the titanium alloy tubes to the inner wall of the annular positioning seat 701, so as to fix and position the titanium alloy tubes.

[0026] See also Figure 1 In one embodiment, a pull handle 501 is fixedly provided at one end of the pull rod 50 away from the first piston plate 30, and an indication component 60 is also provided on the side wall of the pull rod 50, and the indication component 60 is used to indicate the moving position of the first piston plate 30 inside the titanium alloy tube.

[0027] By setting the indicating assembly 60, the position of the first piston plate 30 inside the titanium alloy tube can be intuitively reflected. When the first piston plate 30 moves to the position inside the titanium alloy tube close to the welding seam, the staff can use the indicating assembly 60 to quickly rotate the pull rod 50, so that the limiting push rod 803 limits the first piston plate 30 and separates the pull rod 50 from the first piston plate 30.

[0028] See also Figure 1 In one embodiment, the indicating assembly 60 includes a first telescopic rod 601 and a second telescopic rod 602, one end of the second telescopic rod 602 is connected to the side wall of the pull rod 50, and the other end is connected to the first telescopic rod 601, the second telescopic rod 602 and the pull rod 50 are perpendicular to each other, and the first telescopic rod 601 and the pull rod 50 are parallel to each other.

[0029] During welding, the second telescopic rod 602 can be stretched first, so that the first telescopic rod 601 moves to the outside of the titanium alloy tube, and then the first telescopic rod 601 is stretched so that the first telescopic rod 601 is horizontally distributed outside the titanium alloy tube (such as Figure 1As shown), at this time, the position of the end of the first telescopic rod 601 away from the second telescopic rod 602 is the position of the first piston plate 30, so as to indicate the position of the first piston plate 30; when the welding is completed, the first telescopic rod 601 can be retracted, and then the second telescopic rod 602 can be retracted. The retracted first telescopic rod 601 and the second telescopic rod 602 are retracted to the inner area of ​​the titanium alloy tube to avoid the first telescopic rod 601 and the second telescopic rod 602 affecting the smooth removal of the titanium alloy tube from the annular positioning seat 701 after welding.

[0030] In the embodiment of the present invention, when it is necessary to perform gas shielded welding on the titanium alloy tube, the two groups of titanium alloy tubes to be welded can be positioned by two groups of positioning components 70 respectively, and one end of the two groups of titanium alloy tubes after positioning are connected to form a welding seam, and then the pull rod 50 is pulled, and the pull rod 50 drives the first piston plate 30 and the second piston plate 40 to move along the inside of one group of titanium alloy tubes. At this time, the flexible air pipe 201 is stretched adaptively, and when the first piston plate 30 moves to a position close to the welding seam, the limiting component 80 limits the first piston plate 30, and one end of the pull rod 50 is separated from the first piston plate 30 and drives the second piston plate 40 to continue to move, and the second piston plate 40 moves away from the first piston plate 30 and enters into another group of titanium alloy tubes. At this time, the second piston plate 40 can draw the inert gas inside the air storage box 20 to between the first piston plate 30 and the second piston plate 40 through the negative pressure generated when it moves away from the first piston plate 30, thereby isolating oxygen and avoiding oxidation of the metal at the root of the weld and the occurrence of slag, thereby ensuring the welding quality. Compared with the prior art, when performing gas shielded welding on the titanium alloy tube, the inert gas can be automatically filled into the titanium alloy tube, and the use of the inert gas can be effectively reduced, thereby reducing the waste of the inert gas.

[0031] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A welding device for titanium alloy tubes, characterized in that: It includes a base plate, an air storage box, a first piston plate, a second piston plate, a pull rod, a positioning assembly and a limit assembly. The positioning components are provided with two groups, and the two groups of positioning components are installed on the upper part of the bottom plate, and are used to position two groups of titanium alloy pipes to be welded respectively. The first piston plate and the second piston plate are arranged on one side of the air storage box, and the first piston plate is in contact with the second piston plate. One end of the pull rod passes through the second piston plate and is movably connected to the first piston plate, and the pull rod is fixedly connected to the second piston plate. The air storage box is arranged at the upper edge of the bottom plate, a flexible air pipe is arranged on one side of the air storage box, and one end of the flexible air pipe away from the air storage box passes through the first piston plate and communicates with the area between the first piston plate and the second piston plate. The limiting assembly is arranged inside the first piston plate. When the first piston plate moves along the inside of one group of titanium alloy tubes to a position close to the welding seam, the limiting assembly limits the first piston plate.

2. A welding device for titanium alloy tube according to claim 1, characterized in that: A second through hole is provided at the center of the first piston plate, a first through hole connected to the second through hole is provided at the center of one side of the first piston plate facing the second piston plate, and the diameter of the first through hole is smaller than the diameter of the second through hole. A notch is further provided on a side of the first piston plate facing the second piston plate. The notch is distributed radially along the first piston plate and communicates with the first through hole. One end of the pull rod passes through the first piston plate and extends from the first through hole to the inside of the second through hole. A protrusion is fixedly provided on the side wall of the rod body of the pull rod located inside the second through hole. The protrusion is perpendicular to the pull rod.

3. A welding device for titanium alloy tube according to claim 2, characterized in that: A channel is provided in the first piston plate, and the channel is distributed radially along the first piston plate. One end of the channel extends to the circumferential side of the first piston plate, and the other end is connected to the second through hole. The limiting assembly includes a rotating rod, a square block, a limiting top rod and an arc-shaped protrusion. One end of the rotating rod is rotatably connected to the wall of the second through hole, and the other end is fixedly connected to the square block. The rotating rod is distributed axially along the first piston plate, and the arc-shaped protrusion is arranged on the outside of the rotating rod. One end of the limiting push rod is located inside the channel, and the other end extends to the inside of the second through hole and contacts with the rotating rod. The end position of the rod body of the pull rod located inside the second channel is provided with a square socket adapted to the square block.

4. A welding device for titanium alloy tube according to claim 1, characterized in that: A telescopic support rod is also provided on one side of the air storage box, and one end of the telescopic support rod away from the air storage box is connected to the first piston plate.

5. The welding device for titanium alloy tube according to claim 1, characterized in that: The two groups of positioning components have the same structure, and both include an annular positioning seat and a locking bolt. The annular positioning seat is fixedly installed on the upper part of the base plate, and the locking bolt is installed on the side wall of the annular positioning seat.

6. A welding device for titanium alloy tube according to claim 1, characterized in that: A pull handle is fixedly provided at one end of the pull rod away from the first piston plate, and an indication component is also provided on the side wall of the pull rod, and the indication component is used to indicate the moving position of the first piston plate inside the titanium alloy tube.

7. A welding device for titanium alloy tube according to claim 6, characterized in that: The indicating assembly includes a first telescopic rod and a second telescopic rod, One end of the second telescopic rod is connected to the side wall of the pull rod, and the other end is connected to the first telescopic rod. The second telescopic rod and the pull rod are perpendicular to each other, and the first telescopic rod and the pull rod are parallel to each other.

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