Titanium alloy pipeline welding equipment

Abstract

The invention relates to the field of titanium alloy pipeline welding, in particular to titanium alloy pipeline welding equipment which comprises an adjusting unit for adjusting the distance between two adjacent sections of pipelines, and the adjusting unit comprises a middle body and an adjusting assembly arranged on the middle body; the adjusting assembly comprises two fluted discs, inner rings of the two fluted discs are rotationally connected to an outer ring of the middle body, outer rings of the two fluted discs are meshed with gears, the gears are arranged on the middle body through a supporting frame, a plurality of inserting plates are arranged between the two fluted discs, a sliding rod is fixedly connected to the middle position of one end face of each inserting plate, and the sliding rods are slidably connected into the middle body; according to the titanium alloy pipeline welding equipment, the arranged inserting plate can control the distance between the two sections of titanium alloy pipelines, namely the distance between the two sections of titanium alloy pipelines in the axial direction is controlled, meanwhile, the top plate is arranged on the inserting plate, and the top plate can restrain the radial deviation of the two sections of titanium alloy pipelines; the two sections of titanium alloy pipelines can be located on the same axis, and the welding quality of the two sections of titanium alloy pipelines is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of titanium alloy pipeline welding, in particular to titanium alloy pipeline welding equipment. Background Art

[0002] Titanium alloy pipes are pipes made of titanium alloy, which have high mechanical properties, excellent stamping properties, and high corrosion resistance. In terms of corrosion resistance, titanium alloy pipes have higher corrosion resistance in seawater than aluminum alloy pipes, stainless steel pipes, and nickel-based alloy pipes. Therefore, they are often used in seawater development projects with high corrosiveness, such as seawater desalination projects, and are widely used in pipeline systems for transporting seawater and heating pipeline systems.

[0003] Pipe connections in pipeline systems are generally made through flanges with sealing rings, or by directly welding two sections of titanium alloy pipes. However, when welding two sections of titanium alloy pipes, not only is it required to be bevel the welding end of the pipe, but it is also necessary to control the distance between the welding end faces of the two sections of titanium alloy pipes to ensure that a complete and well-sealed weld is obtained from the outer surface of the titanium alloy pipe to the inner surface of the pipe. At present, the implementation of titanium alloy pipe welding is not perfect. When the welding ends of two sections of titanium alloy pipes are butt-jointed, the gap width is difficult to control, and the gap width distribution is not uniform. Figure 1 As shown in the figure, if welding is carried out according to this situation, the weld will not meet the welding requirements and it will be difficult to ensure the safety and reliability of the subsequent pipeline system.

[0004] Therefore, a titanium alloy pipeline welding device is proposed to solve the above problems. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows: a titanium alloy pipeline welding device described in the present invention includes an adjustment unit for adjusting the distance between two adjacent sections of the pipeline, and the adjustment unit includes a rectangular intermediate body and an adjustment component arranged on the intermediate body; The adjustment assembly includes two toothed discs, the inner rings of the two toothed discs are rotatably connected to the outer ring of the intermediate body, the outer rings of the two toothed discs are meshed with gears, the gears are mounted on the intermediate body through a support frame, a plurality of plug plates are arranged between the two toothed discs, a sliding rod is fixedly connected to the middle position of one end face of each plug plate, and the sliding rod is slidably connected to the inside of the intermediate body; A guide rod is provided on the outer side wall of each of the insert plates, and the ends of the guide rod are respectively opposite to the inner side walls of the two toothed discs; A vortex-shaped spiral body is provided on the inner side walls of the two toothed discs, and the end of the guide rod is slidably connected to the upper spiral body; A plurality of slots are symmetrically arranged on the side walls of both sides of each plug board, and a top plate is arranged between two opposite slots. The top plate is in a U shape, and the inner side of the top plate is slidably connected in the slot.

[0007] Preferably, the cross section of each insert plate is in the shape of an isosceles trapezoid.

[0008] Preferably, a plurality of rotation grooves are provided on the side wall of each guide rod, and a steel ball is rotatably connected in each rotation groove.

[0009] Preferably, columns are provided at both ends of the intermediate body, a slide groove is opened on the outer wall of the column, a base block is slidably connected in the slide groove, an electric push rod is provided on the base block, the rod body of the electric push rod is arranged perpendicular to the side wall of the column, and a support plate is fixedly connected to the output end of the electric push rod.

[0010] Preferably, a cross-shaped rotating plate is rotatably connected to the middle position of the end of each column, and each end of the rotating plate is threadedly connected to a screw rod, and the end of the screw rod can squeeze the base block into the slide groove.

[0011] Preferably, a connecting column is provided at the end of the intermediate body, a U-shaped connecting plate is provided at the end of the connecting column, two plates of the connecting plate are rotatably connected to the outer ring of the connecting column, and the end face of the connecting plate is fixed to the column.

[0012] Preferably, the connecting column is rotatably connected inside the intermediate body.

[0013] Preferably, a ring-shaped scale is provided on the end surface of the intermediate body, and a pointer is provided on the outer ring of the connecting column.

[0014] Preferably, annular grooves are symmetrically provided on the outer ring of the intermediate body, and the inner ring of the gear plate is rotatably connected in the annular grooves.

[0015] Preferably, a rubber plate is provided on the outer surface of each support plate.

[0016] The present invention is beneficial in that: 1. In the present invention, the design of the titanium alloy pipe welding equipment is that the plug plate can not only control the distance between the two sections of the titanium alloy pipes, that is, control the distance between the two sections of the titanium alloy pipes in the axial direction, but also the top plate arranged on the plug plate can constrain the radial offset of the two sections of the titanium alloy pipes, that is, the two sections of the titanium alloy pipes are on the same axis, thereby ensuring the welding quality of the two sections of the titanium alloy pipes.

[0017] 2. In the present invention, a U-shaped connecting plate is rotatably connected to the connecting column, and the two plate bodies of the connecting plate are fixed to the connecting column by means of bolts and nuts. After adjusting the angle between the column and the intermediate body, the nut is tightened to fix the relative rotation between the connecting plate and the connecting column, and then the two columns are respectively placed in two titanium alloy bent pipes, the electric push rod is driven, and the support plate is pressed against the inner surface of the titanium alloy bent pipe to achieve the fixation of the two sections of the titanium alloy bent pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the uneven width of the butt gap between two sections of titanium alloy pipes; Figure 2 This is a schematic diagram of welding two sections of titanium alloy elbow pipes in the present invention; Figure 3 It is a stereoscopic diagram of the adjustment unit and a section of titanium alloy elbow in the present invention; Figure 4 It is a schematic diagram of the cooperation between the adjustment unit and two sections of titanium alloy elbows in the present invention; Figure 5 This is a schematic diagram of the butt connection of two sections of titanium alloy pipes in the present invention; Figure 6 A first perspective stereogram of the adjustment unit in the present invention; Figure 7 A second perspective stereoscopic diagram of the adjustment unit in the present invention; Figure 8 is a schematic diagram of a toothed disc in the present invention; Fig. 9 It is a three-dimensional diagram of the coordination between the intermediate body and the plugboard in the present invention; Fig.10 It is a front view of the intermediate body and the plug board in the present invention; Fig.11 It is a schematic diagram of the matching state of the axes of two sections of titanium alloy bent pipes in the present invention being in different planes; Fig.12 is a three-dimensional diagram of the plug board in the present invention; Fig.13 It is a front view of the plug board in the present invention; Fig.14 is a three-dimensional diagram of the column in the present invention; Fig.15 It is a schematic diagram of the cooperation between the base block and the slide groove in the present invention; Fig.16 It is a three-dimensional diagram of the cooperation between the electric push rod and the support plate in the present invention.

[0019] In the figure: 101, titanium alloy pipe; 102, groove; 103, weld; 1, intermediate body; 2, toothed disc; 3, gear; 4, plug plate; 5, slide rod; 6, guide rod; 7, spiral body; 8, slot; 9, top plate; 10, support frame; 11, motor; 12, steel ball; 13, column; 14, slide groove; 15, base block; 16, electric push rod; 17, support plate; 18, electric socket; 19, plug-in rod; 20, rotating plate; 21, screw; 22, connecting column; 23, connecting plate; 24, top screw; 25, scale; 26, annular groove; 27, rubber sheet. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0021] Reference Figure 2 - Fig.13 A titanium alloy pipeline welding device includes an adjustment unit for adjusting the distance between two adjacent pipeline sections, and a welding gun, the welding gun is used to weld two adjacent pipeline sections; the adjustment unit includes an intermediate body 1 in a rectangular parallelepiped shape, and an adjustment component arranged on the intermediate body 1; the adjustment component includes two toothed discs 2, the inner rings of the two toothed discs 2 are rotatably connected to the outer ring of the intermediate body 1, the outer rings of the two toothed discs 2 are meshed with gears 3, the gears 3 are arranged on the intermediate body 1 through a support frame 10, a plurality of plug plates 4 are arranged between the two toothed discs 2, and each plug plate 4 A slide bar 5 is fixedly connected to the middle position of one end surface, and the slide bar 5 is slidably connected to the inside of the intermediate body 1; a guide rod 6 is provided on the outer wall of each of the plug plates 4, and the ends of the guide rod 6 are respectively opposite to the inner walls of the two toothed discs 2; a spiral spiral body 7 is provided on the inner walls of the two toothed discs 2, and the ends of the guide rod 6 are slidably connected to the upper spiral body 7; a plurality of slots 8 are symmetrically provided on the side walls of both sides of each of the plug plates 4, and a top plate 9 is provided between the two opposite slots 8, and the top plate 9 is U-shaped, and the inner side of the top plate 9 is slidably connected to the slot 8; In this embodiment, two or more support frames 10 can be centrally symmetrically arranged on the intermediate body 1, and the ends of the support frames 10 are rotatably connected to the gears 3, which are driven by the motor 11. The multiple gears 3 rotate synchronously and drive the two toothed discs 2 to rotate in the same direction. In this embodiment, the intermediate body 1 is connected with a wire, and the wire transmits power to the motor 11; The specific operation process of the titanium alloy pipeline welding equipment is as follows: Installation: First, drive the motor 11, which drives the toothed disc 2 to rotate through the gear 3, and the toothed disc 2 drives the spiral body 7 with a vortex shape set on the inner wall to rotate, and the side wall of the spiral body 7 squeezes the guide rod 6, and the guide rod 6 drives the plug plate 4 to extend and move in the outer direction of the intermediate body 1, so that the diameter of the circle surrounded by the end of the plug plate 4 is larger than the outer diameter of the titanium alloy pipe 101, and then the intermediate body 1 is placed between two sections of the titanium alloy pipe 101. At this time, the welding end faces of the two sections of the titanium alloy pipe 101 are against the plug plate 4. There is a gap between the top plate 9 on the plug plate 4 and the titanium alloy pipe 101, and then the driving motor 11 is rotated, and the plug plate 4 continues to move toward the outside of the intermediate body 1, and the plug plate 4 drives the top plate 9 to press against the inner wall of the titanium alloy pipe 101. At this time, the axial spacing between the two sections of the titanium alloy pipe 101 is limited by the thickness of the plug plate 4, that is, the width reserved for welding. At the same time, the two sections of the titanium alloy pipe 101 are constrained in the radial direction by the synchronously moving top plate 9, that is, the two sections of the titanium alloy pipe 101 are on the same axis; Pre-welding: In this embodiment, welding is performed by plasma welding technology. The welding gun first performs multi-position spot welding between the two sections of the titanium alloy pipe 101. The spot welding can fix the two sections of the titanium alloy pipe 101 together. Disassembly: The driving motor 11 is reversed, and the motor 11 drives the toothed disc 2 to rotate in the opposite direction through the gear 3. The spiral body 7 on the toothed disc 2 squeezes the guide rod 6, so that the insert plate 4 moves toward the middle. At this time, the end of the insert plate 4 is retracted into the titanium alloy pipe 101, and the insert plate 4 is separated from the gap between the two sections of the titanium alloy pipe 101. Then, the titanium alloy pipe welding equipment is removed from one of the sections of the titanium alloy pipe 101; Full welding: Using plasma welding technology, the welding gun fully welds two sections of titanium alloy pipes 101; The titanium alloy pipe welding equipment is provided with a plug plate 4 which can not only control the spacing between the two sections of the titanium alloy pipes 101, that is, control the distance between the two sections of the titanium alloy pipes 101 in the axial direction, but also a top plate 9 is provided on the plug plate 4. The top plate 9 can constrain the radial offset of the two sections of the titanium alloy pipes 101, that is, the two sections of the titanium alloy pipes 101 are placed on the same axis, thereby ensuring the welding quality of the two sections of the titanium alloy pipes 101.

[0022] Reference Figure 2 - Fig.13 The cross section of each plug board 4 is in the shape of an isosceles trapezoid.

[0023] In this embodiment, the thickness of the insert plate 4 is gradually reduced from the direction close to the intermediate body 1 to the direction away from the intermediate body 1, that is, the cross section of the insert plate 4 is in an isosceles trapezoidal shape; When titanium alloy pipes with different diameters and wall thicknesses are welded, the distance between the two sections of titanium alloy pipes 101 is also different. For this purpose, insert plates 4 with different thicknesses at both ends are provided. Fig.12 and Fig.13As shown, the extension length of the plug plate 4 outwardly toward the titanium alloy pipe 101 determines the distance between the two sections of the titanium alloy pipe 101. The greater the extension length, the greater the distance between the two sections of the titanium alloy pipe 101. The extension length of the end of the plug plate 4 is adjusted according to the wall thickness and diameter of the titanium alloy pipe 101. At the same time, the top plate 9 is installed in the corresponding slot 8. After the end of the plug plate 4 extends outwardly to the set length, the top plate 9 can be pressed against the inner ring surface of the titanium alloy pipe 101 to stabilize the two sections of the titanium alloy pipe together, thereby ensuring that the subsequent spot welding process can be smoothly executed.

[0024] Reference Figure 8 - Fig.13 , a plurality of rotation grooves are formed on the side wall of each guide rod 6, and a steel ball 12 is rotatably connected in each rotation groove; When the insert plate 4 moves away from the intermediate body 1 or moves towards the intermediate body 1, the slide rod 5 is slidably connected inside the intermediate body 1 to ensure the movement stability of the insert plate 4. At the same time, the steel ball 12 arranged on the guide rod 6 converts the sliding friction between the spiral body 7 and the guide rod 6 into rolling friction between the steel ball 12 and the spiral body 7, thereby reducing the relative movement resistance between the guide rod 6 and the spiral body 7, improving the execution stability of the toothed disc 2 and the insert plate 4, and helping the top plate 9 to be stably squeezed on the inner ring surface of the two sections of the titanium alloy pipe 101.

[0025] Reference Figure 2 - Fig.10 ,as well as Fig.14 - Fig.16 , columns 13 are provided at both ends of the intermediate body 1, a slide groove 14 is provided on the outer wall of the column 13, a base block 15 is slidably connected in the slide groove 14, an electric push rod 16 is provided on the base block 15, the rod body of the electric push rod 16 is arranged perpendicular to the side wall of the column 13, and a support plate 17 is fixedly connected to the output end of the electric push rod 16; In this embodiment, an electric socket 18 is provided on one end face of the designed base block 15, and the electric socket 18 is electrically connected to the electric push rod 16 on the base block 15. An electric plug rod 19 adapted to the electric socket 18 is provided on the inner wall of the slide groove 14. When the base block 15 slides into the slide groove 14, the electric plug rod 19 is inserted into the electric socket 18, and the electric push rod 16 is connected to the power supply; The column 13 is provided in cooperation with the electric push rod 16 to further support and strengthen the stability between the two sections of the titanium alloy pipe 101. Considering that the length and diameter of the welded titanium alloy pipe 101 have various specifications and different weights, for welding of some titanium alloy pipes 101 with larger diameters or thicker walls, the column 13 is used in cooperation with the electric push rod 16 to enhance the support and control of the two sections of the titanium alloy pipe 101 and stabilize the distance between the two sections of the titanium alloy pipe 101. The specific operation is as follows: first, one of the columns 13 is placed in one of the sections of the titanium alloy pipe 101, and then the titanium alloy pipe welding equipment is followed. After that, the other column 13 is also placed in the other section of the titanium alloy pipe 101, and then the electric push rod 16 is driven. The electric push rod 16 drives the support plate 17 to squeeze the inner surface of the titanium alloy pipe 101 to fix the two sections of the titanium alloy pipe 101 together, thereby improving the stability between the two sections of the titanium alloy pipe 101.

[0026] Reference Figure 2 - Fig.10 ,as well as Fig.14 - Fig.16 A "cross"-shaped rotating plate 20 is rotatably connected to the middle position of the end of each of the columns 13, and a screw 21 is threadedly connected to each end of the rotating plate 20. The end of the screw 21 can squeeze the base block 15 into the slide groove 14; In this embodiment, the electric push rod 16 cooperates with the base block 15 to form a modular design. The output end support force and extension length of different types of electric push rods 16 are different. In order to support titanium alloy pipes of different sizes, the electric push rod 16 and the base block 15 are replaced, that is, modularly designed, and different types of electric push rods 16 are selected according to the size of the titanium alloy pipe 101; The base block 15 is slidably connected in the slide groove 14, which makes it convenient to replace the electric push rod 16. However, there are also some shortcomings. The base block 15 is not stable enough with the slide groove 14. For this purpose, a rotating plate 20 is provided. The rotating plate 20 is threadedly connected to the screw 21. When the base block 15 is slidably installed in the slide groove 14, the rotating plate 20 is rotated so that each end of the rotating plate 20 is opposite to the notch of the slide groove 14, and then the screw 21 is rotated. The end of the screw 21 gradually extends into the slide groove 14 and squeezes the base block 15 inside the slide groove 14. This can ensure the stability of the base block 15 and enable the electric push rod 16 to stably squeeze the support plate 17 onto the inner surface of the titanium alloy pipe 101. At the same time, it can also improve the electrical connection stability between the electrical socket 18 and the plug-in rod 19.

[0027] Reference Figure 2 - Fig.10 ,as well as Fig.14 - Fig.16 The end of the intermediate body 1 is provided with a connecting column 22, and the end of the connecting column 22 is provided with a U-shaped connecting plate 23. The two plates of the connecting plate 23 are rotatably connected to the outer ring of the connecting column 22, and the end face of the connecting plate 23 is fixed to the column 13.

[0028] In the desalination project, the titanium alloy pipes 101 in the pipeline system have both straight pipes and bent pipes. For the welding of titanium alloy bent pipes and titanium alloy straight pipes, or the welding of two sections of titanium alloy bent pipes, such as Figure 2As shown, it is also applicable that a U-shaped connecting plate 23 is rotatably connected to the connecting column 22, and the two plates of the connecting plate 23 are fixed to the connecting column 22 by means of bolts and nuts. After adjusting the angle between the column 13 and the intermediate body 1, tighten the nut to fix the relative rotation between the connecting column 22 and the connecting column 22, and then place the two columns 13 in two titanium alloy bent pipes respectively, drive the electric push rod 16, and the support plate 17 is pressed against the inner surface of the titanium alloy bent pipe to achieve the fixation of the two sections of the titanium alloy bent pipe.

[0029] Reference Figure 2 - Fig.10 ,as well as Fig.14 - Fig.16 , the connecting column 22 is rotatably connected inside the intermediate body 1; like Fig.11 As shown, this situation also exists in the pipeline system, that is, the axes of the two sections of titanium alloy bent pipes are not in the same plane, and fixed welding can also be achieved in this situation; the connecting column 22 is rotatably connected in the end of the intermediate body 1, and a top screw 24 is threadedly connected on the outer wall of the end of the intermediate body 1. By rotating the top screw 24, the connecting column 22 can be stabilized after rotation adjustment, and then the two columns 13 are respectively placed inside the two sections of titanium alloy bent pipes, and then the electric push rod 16 is driven, and the support plate 17 is pressed against the inner surface of the titanium alloy bent pipe to achieve the fixation of the two sections of titanium alloy bent pipes.

[0030] Reference Figure 6 - Fig. 9 , a ring-shaped scale 25 is provided on the end surface of the intermediate body 1, and a pointer is provided on the outer ring of the connecting column 22; By setting the scale 25 and the pointer, the outer rotation angle of the connecting column 22 can be quickly adjusted to improve the overall welding efficiency.

[0031] Reference Figure 7 The outer ring of the intermediate body 1 is symmetrically provided with an annular groove 26, and the inner ring of the gear plate 2 is rotatably connected in the annular groove 26; The annular groove 26 is used to constrain the gear plate 2. A bearing can be set on the inner ring of each gear plate 2, and the outer ring of the bearing is fixed to the inner ring of the gear plate 2. The inner ring of the bearing is fixed in the annular groove 26 to improve the rotation stability of the gear plate 2. At the same time, the annular groove 26 is used to limit the swing of the gear plate 2, so that the gear plate 2 is in a stable state when meshing with the gear 3.

[0032] Reference Fig.16 , a rubber sheet 27 is provided on the outer surface of each support plate 17. The feature is that: a rubber sheet 27 is provided on the outer surface of each support plate 17; the rubber sheet 27 is provided on the outer surface of the support plate 17, and the rubber sheet 27 can prevent the inner surface of the titanium alloy pipe 101 from being squeezed and worn by the metal support plate 17, and also provides buffer protection for the titanium alloy pipe 101.

[0033] Working principle: The specific operation process of the titanium alloy pipeline welding equipment is as follows: Installation: First, drive the motor 11, which drives the toothed disc 2 to rotate through the gear 3, and the toothed disc 2 drives the spiral body 7 with a vortex shape set on the inner wall to rotate, and the side wall of the spiral body 7 squeezes the guide rod 6, and the guide rod 6 drives the plug plate 4 to extend and move in the outer direction of the intermediate body 1, so that the diameter of the circle surrounded by the end of the plug plate 4 is larger than the outer diameter of the titanium alloy pipe 101, and then the intermediate body 1 is placed between the two sections of the titanium alloy pipe 101. At this time, the welding end faces of the two sections of the titanium alloy pipe 101 are against the plug plate 4, and the plug plate 4 is inserted. There is a gap between the top plate 9 on the plate 4 and the titanium alloy pipe 101, and then the driving motor 11 is rotated, and the plug plate 4 continues to move toward the outside of the intermediate body 1, and the plug plate 4 drives the top plate 9 to press against the inner wall of the titanium alloy pipe 101. At this time, the axial spacing between the two sections of the titanium alloy pipe 101 is limited by the thickness of the plug plate 4, that is, the width reserved for welding. At the same time, the two sections of the titanium alloy pipe 101 are constrained in the radial direction by the synchronously moving top plate 9, that is, the two sections of the titanium alloy pipe 101 are on the same axis; Pre-welding: using plasma welding technology, multiple position spot welding is first performed between the two sections of the titanium alloy pipe 101, and the spot welding can fix the two sections of the titanium alloy pipe 101 together; Disassembly: The drive motor 11 is reversed, and the motor 11 drives the toothed disc 2 to rotate in the opposite direction through the gear 3. The spiral body 7 on the toothed disc 2 squeezes the guide rod 6, so that the plug plate 4 moves to the middle. At this time, the end of the plug plate 4 is retracted into the titanium alloy pipe 101, and the plug plate 4 is separated from the gap between the two sections of the titanium alloy pipe 101. Then, the titanium alloy pipe welding equipment is removed from one of the sections of the titanium alloy pipe 101. Full welding: Two sections of titanium alloy pipe 101 are fully welded by plasma welding technology.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A titanium alloy pipeline welding equipment, characterized in that: It comprises an adjustment unit for adjusting the distance between two adjacent pipe sections, and the adjustment unit comprises a rectangular parallelepiped intermediate body (1) and an adjustment component arranged on the intermediate body (1); The adjustment assembly comprises two toothed discs (2), the inner rings of the two toothed discs (2) being rotatably connected to the outer ring of the intermediate body (1), the outer rings of the two toothed discs (2) being meshed with gears (3), the gears (3) being arranged on the intermediate body (1) via a support frame (10), a plurality of insert plates (4) being arranged between the two toothed discs (2), a sliding rod (5) being fixedly connected to the middle position of one end surface of each insert plate (4), and the sliding rod (5) being slidably connected to the interior of the intermediate body (1); A guide rod (6) is provided on the outer side wall of each of the insert plates (4), and the ends of the guide rod (6) are respectively opposite to the inner side walls of the two toothed discs (2); A vortex-shaped spiral body (7) is provided on the inner side walls of the two toothed discs (2), and the end of the guide rod (6) is slidably connected to the upper spiral body (7); A plurality of slots (8) are symmetrically provided on the side walls of each plug board (4), and a top plate (9) is provided between two opposite slots (8). The top plate (9) is U-shaped, and the inner side of the top plate (9) is slidably connected to the slots (8).

2. The titanium alloy pipeline welding equipment according to claim 1 is characterized in that: The cross section of each insert plate (4) is in the shape of an isosceles trapezoid.

3. The titanium alloy pipeline welding equipment according to claim 1 is characterized in that: A plurality of rotation grooves are formed on the side wall of each guide rod (6), and a steel ball (12) is rotatably connected in each rotation groove.

4. The titanium alloy pipeline welding equipment according to claim 1 is characterized in that: The intermediate body (1) is provided with a column (13) at both ends, a slide groove (14) is provided on the outer wall of the column (13), a base block (15) is slidably connected in the slide groove (14), an electric push rod (16) is provided on the base block (15), the rod body of the electric push rod (16) is arranged perpendicular to the side wall of the column (13), and a support plate (17) is fixedly connected to the output end of the electric push rod (16).

5. The titanium alloy pipeline welding equipment according to claim 4 is characterized in that: A "cross"-shaped rotating plate (20) is rotatably connected to the middle position of the end of each column (13), and a screw rod (21) is threadedly connected to each end of the rotating plate (20). The end of the screw rod (21) can squeeze the base block (15) into the slide groove (14).

6. The titanium alloy pipeline welding equipment according to claim 4 is characterized in that: The end of the intermediate body (1) is provided with a connecting column (22), and the end of the connecting column (22) is provided with a U-shaped connecting plate (23), two plates of the connecting plate (23) are rotatably connected to the outer ring of the connecting column (22), and the end surface of the connecting plate (23) is fixedly connected to the column (13).

7. The titanium alloy pipeline welding equipment according to claim 6 is characterized in that: The connecting column (22) is rotatably connected inside the intermediate body (1).

8. The titanium alloy pipeline welding equipment according to claim 7 is characterized in that: A ring-shaped scale (25) is provided on the end surface of the intermediate body (1), and a pointer is provided on the outer ring of the connecting column (22).

9. The titanium alloy pipeline welding equipment according to claim 1, characterized in that: An annular groove (26) is symmetrically provided on the outer ring of the intermediate body (1), and the inner ring of the toothed disc (2) is rotatably connected in the annular groove (26).

10. The titanium alloy pipeline welding equipment according to claim 4, characterized in that: A rubber plate (27) is provided on the outer surface of each support plate (17).

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