Pile pier integrated construction device and construction method

Abstract

The present invention relates to the field of pile pier construction, and in particular to a device and construction method for pile pier integrated construction, the construction method comprising the following steps: S100, pre-setting concrete pipe piles, pre-fabricating a connecting frame, the connecting frame being welded by a plurality of first connecting steel plates and a plurality of supporting steel bars; S200, welding a second connecting steel plate on the outer wall of the concrete pipe pile; S300, vertically inserting the concrete pipe pile into the ground, welding the first connecting steel plate and the second connecting steel plate, fixing the connecting frame on the outer wall of the concrete pipe pile, and the connecting frame connecting adjacent concrete pipe piles. The present invention has the effect of reducing the use of steel bars during pier casting, shortening construction time, and improving construction efficiency.

Description

Technical Field

[0001] The invention relates to the field of pile pier construction, and in particular to a pile pier integrated construction device and a construction method. Background Art

[0002] The piers of bridges are generally cast by concrete, by setting up a steel cage as a skeleton, and then setting up a mold, pouring concrete into the mold, and finally forming the piers.

[0003] At present, when pouring bridge piers, a large amount of steel bars are needed, including using steel bars to weave steel cages, and using steel bars as supports to support and position steel cages, etc. It also takes a lot of time to arrange the steel bars, which prolongs the construction time. Summary of the invention

[0004] In order to reduce the use of steel bars during pier casting, shorten the construction time and improve the construction efficiency, the present invention provides a device and a construction method for pile-pier integrated construction.

[0005] The present invention provides a pile pier integrated construction method, which adopts the following technical scheme:

[0006] A pile-pier integrated construction method comprises the following steps:

[0007] S100, prefabricate concrete pipe piles and prefabricate a connecting frame, wherein the connecting frame is welded by a plurality of first connecting steel plates and a plurality of supporting steel bars;

[0008] S200, welding a second connecting steel plate on the outer wall of the concrete pipe pile;

[0009] S300, vertically inserting the concrete pipe pile into the ground, welding the first connecting steel plate and the second connecting steel plate, fixing the connecting frame on the outer side wall of the concrete pipe pile, and the connecting frame connecting adjacent concrete pipe piles.

[0010] S400, install the mold, pour concrete, and cast the pier.

[0011] In a specific possible implementation manner, the concrete pipe piles are prestressed pipe piles.

[0012] The present invention also provides a construction device, which adopts the following technical solution:

[0013] A construction device, used for welding the above-mentioned connecting frame, comprises a first guide rail and a second guide rail, the first guide rail and the second guide rail are arranged in parallel, a first base is arranged on the first guide rail, a first support frame is arranged on the first base, and a first clamping member is arranged on the first support frame;

[0014] A second support frame is provided on the second base, a second clamping member is provided on the second support frame, a connecting guide rail is provided between the first support frame and the second support frame, and a moving vehicle is provided on the connecting guide rail;

[0015] A cutting assembly is provided at one end of the mobile vehicle, a clamping assembly is provided at one end of the mobile vehicle away from the cutting assembly, a welding assembly is provided on the mobile vehicle, and the welding assembly is arranged between the cutting assembly and the clamping assembly.

[0016] In a specific feasible implementation scheme, the cutting assembly includes a telescopic cylinder, a connecting plate and a cutting knife. The telescopic cylinder is arranged in the mobile vehicle, and the piston rod of the telescopic cylinder passes through the mobile vehicle. The connecting plate is arranged at one end of the piston rod of the telescopic cylinder outside the mobile vehicle. The cutting knife is arranged on the connecting plate, and a first driving motor for driving the cutting knife to rotate is provided on the connecting plate.

[0017] In a specific feasible implementation scheme, the clamping assembly includes a clamping cylinder, a plurality of clamping blocks and a guide sleeve, the clamping cylinder is arranged in the mobile vehicle, the movable end of the clamping cylinder passes through the mobile vehicle, the plurality of clamping blocks are arranged at the movable end of the clamping cylinder, and the guide sleeve is arranged on the clamping block.

[0018] In a specific possible implementation mode, the guide sleeve is penetrated by a plurality of clearance holes, each of the clearance holes is provided with a roller, and the rolling direction of the roller is the same as the length direction of the connecting guide rail.

[0019] In a specific possible implementation scheme, the plurality of rollers are interconnected via universal joints, a gear is provided on the rotating shaft of the roller, a second drive motor is provided on the guide sleeve, and a drive wheel meshing with the gear is provided on the output shaft of the second drive motor.

[0020] In a specific possible implementation mode, the welding assembly includes a welding gun, a slider and a slide rail, the slide rail is arranged on the outer wall of the mobile vehicle, the slider is arranged on the slide rail, the slider is provided with a mounting plate, and the welding gun is arranged on the mounting plate.

[0021] In a specific possible implementation scheme, at least two welding guns are provided, and the welding guns are symmetrically arranged on both sides of the mounting plate. A push-pull cylinder is provided between adjacent welding guns, and the push-pull cylinder is a double-rod cylinder. The piston rod of the push-pull cylinder is connected to the two welding guns to drive the welding guns to move closer to or away from each other.

[0022] The sliding block is provided with an installation cavity, a pressing oil cylinder is arranged in the installation cavity, and the installation plate is arranged on the piston rod of the pressing oil cylinder.

[0023] In a specific feasible implementation scheme, a accommodating cavity is provided on the slider, a rotating cylinder is provided in the accommodating cavity, the mounting plate is arranged on the piston rod of the rotating cylinder, an adjusting track is provided on the mounting plate, a moving block is provided on the adjusting track, the welding gun is hinged on the moving block, a swinging cylinder is provided on the moving block, and the outer shell of the welding gun is connected to the piston rod of the swinging cylinder.

[0024] In summary, the present invention includes at least one of the following beneficial technical effects:

[0025] 1. By setting up connecting frames and prestressed concrete piles, prestressed concrete piles are used to replace some steel bars, reducing the use of steel bars during pier pouring, shortening construction time and improving construction efficiency;

[0026] 2. Use mobile vehicles to automatically transport, weld and cut steel bars, improve the welding efficiency of the connecting frame, and further improve construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the connecting frame.

[0028] Figure 2 It is a schematic diagram of the overall structure of the construction device.

[0029] Figure 3 Schematic diagram of the structure of the second substrate.

[0030] Figure 4 It is a schematic structural diagram of the first substrate.

[0031] Figure 5 It is a cross-sectional view of the internal structure of the mobile vehicle in Example 1.

[0032] Figure 6 It is a schematic diagram showing the structure of the guide sleeve.

[0033] Figure 7 It is a cross-sectional view of the internal structure of the slider in Example 1.

[0034] Figure 8 It is a cross-sectional view of the internal structure of the mobile vehicle in Example 2.

[0035] Fig. 9 It is a cross-sectional view of the internal structure of the slider in Example 2.

[0036] Fig.10 It is a cross-sectional view of the pile pier.

[0037] Explanation of reference numerals: 100, first connecting steel plate; 101, supporting steel bar; 102, second connecting steel plate; 103, prestressed pipe pile; 1, first guide rail; 2, second guide rail; 3, first base; 4, second base; 5, first support frame; 6, second support frame; 7, first clamping cylinder; 8, second clamping cylinder; 9, connecting rail; 10, moving vehicle; 11, cutting assembly; 111, telescopic cylinder; 112, connecting plate; 113, cutting knife; 114, first A driving motor; 12, clamping assembly; 121, clamping cylinder; 122, clamping block; 123, guide sleeve; 13, welding assembly; 131, slide rail; 132, slider; 133, welding gun; 14, clearance hole; 15, roller; 16, gear; 17, driving wheel; 18, second driving motor; 19, mounting plate; 20, clamping cylinder; 21, push-pull cylinder; 22, clamping cylinder; 23, pressure plate; 24, rotating cylinder; 25, swing cylinder, 26, mounting seat. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-10 The present invention is described in further detail.

[0039] Reference Figure 1 A connecting frame includes a plurality of first connecting steel plates 100 and a plurality of supporting steel bars 101. The plurality of first connecting steel plates 100 are arranged at intervals along the length direction of the supporting steel bars 101. The length directions of the plurality of first connecting steel plates 100 are parallel. The plurality of supporting steel bars 101 are arranged at intervals along the length direction of the first connecting steel plates 100. The plurality of supporting steel bars 101 are arranged in parallel.

[0040] Embodiment 1:

[0041] Reference Figure 2 , Figure 3 and Figure 4 A construction device includes a first guide rail 1 and a second guide rail 2, which are laid parallel to the ground. A first base 3 is provided on the first guide rail 1, a first support frame 5 is fixed on the first base 3, a first clamping cylinder 7 is fixed on the first support frame, and the piston rod of the first clamping cylinder 7 is arranged toward the first base 3. A second base 4 is provided on the second guide rail 2, a support frame is fixed on the second base 4, a second clamping cylinder 8 is fixed on the second support frame 6, and the piston rod of the second clamping cylinder 8 is arranged toward the second base 4. The first base 3 can slide along the first guide rail 1, and the second base 4 can slide along the second guide rail 2. The support steel bar 101 extends to the second base 4 through the first base 3, and the piston rods of the first clamping cylinder 7 and the second clamping cylinder 8 extend, which can clamp the two ends of the support steel bar 101 on the first base 3 and the second base 4, so as to position and fix the support steel bar 101.

[0042] Reference Figure 2, Figure 3 and Figure 4 A mounting seat 26 is fixed on both the first base 3 and the second base 4, and a connecting guide rail 9 is fixed on the side wall of the mounting seat 26. Both ends of the connecting guide rail 9 are fixed on the two mounting seats 26, thereby connecting the first base 3 and the second base 4, so that the first base 3 and the second base 4 move synchronously, so that the supporting steel bar 101 can remain perpendicular to the first connecting steel plate 100, so that the positioning of the supporting steel bar 101 on the first connecting steel plate 100 is more accurate, thereby improving the positioning accuracy of the supporting steel bar 101.

[0043] Reference Figure 2 and Figure 5 A moving vehicle 10 is provided on the connecting guide rail 9. The moving vehicle 10 can move back and forth along the connecting guide rail 9. The connecting guide rail 9 is arranged above the supporting steel bar 101, so that the moving vehicle 10 moves above the supporting steel bar 101. A cutting assembly 11 is provided at one end of the moving vehicle 10, and a clamping assembly 12 is provided at one end of the moving vehicle 10 away from the cutting assembly 11. The clamping assembly 12 clamps the supporting steel bar 101 and moves it from the first base 3 to the second base 4 to transport the supporting steel bar 101. When the supporting steel bar 101 is transported and positioned, the cutting assembly 11 operates to cut off the supporting steel bar 101. The process of manually transporting and positioning the supporting steel bar 101 is eliminated, and the efficiency of transporting and positioning the supporting steel bar 101 is improved.

[0044] Reference Figure 5 The cutting assembly 11 includes a cutting knife 113, a telescopic oil cylinder 111 and a connecting plate 112. The telescopic oil cylinder 111 is fixed in the mobile vehicle 10. The piston rod of the telescopic oil cylinder 111 passes through and extends from the bottom surface of the mobile vehicle 10. The connecting plate 112 is fixed on the piston rod of the telescopic oil cylinder 111. The cutting knife 113 is arranged on the connecting plate 112. The connecting plate 112 is also fixed with a first driving motor 114. The piston rod of the first driving motor 114 passes through the connecting plate 112 and is coaxially fixedly connected with the cutting knife 113. The first driving motor 114 drives the cutting knife 113 to rotate, and the piston rod of the telescopic oil cylinder 111 extends to make the cutting knife 113 approach the supporting steel bar 101, thereby cutting the supporting steel bar 101. The piston rod of the telescopic oil cylinder 111 retracts, so that the cutting knife 113 is away from the supporting steel bar 101, thereby reducing the possibility of accidentally damaging the supporting steel bar 101.

[0045] Reference Figure 5 and Figure 6The clamping assembly 12 includes a clamping cylinder 121, two clamping blocks 122 and a guide sleeve 123. The clamping cylinder 121 is fixed in the mobile vehicle 10. The clamping fingers of the clamping cylinder 121 pass through the bottom surface of the mobile vehicle 10. The two clamping blocks 122 are respectively fixed on the clamping fingers of the clamping cylinder 121. The guide sleeve 123 is fixed at the bottom end of the clamping block 122. The clamping fingers of the clamping cylinder 121 are close to each other, driving the clamping blocks 122 to be close to each other, and then driving the guide sleeve 123 to be close to each other, clamping the support steel bar 101, and driving the support steel bar 101 to move synchronously during the movement of the mobile vehicle 10. At the same time, the cylindrical shape of the guide sleeve 123 guides the conveying direction of the support steel bar 101. The clamping fingers of the clamping cylinder 121 are far away from each other, so that the guide sleeve 123 is far away from each other, and the guide sleeve 123 loses the clamping effect on the support steel bar 101, which is convenient for the mobile vehicle 10 to reset and convey the next support steel bar 101.

[0046] Reference Figure 5 and Figure 6 The guide sleeve 123 is penetrated with a plurality of clearance holes 14, each of which is provided with a roller 15, and the rolling direction of the roller 15 is the same as the conveying direction of the supporting steel bar 101. The rotating shafts of the plurality of rollers 15 are mutually connected through universal joints (not shown in the figure), so that when a roller 15 rotates, it can drive other rollers on the same longitudinal section to rotate synchronously. A gear 16 is coaxially fixed on the rotating shaft of a roller 15, a second drive motor 18 is fixed on the guide sleeve 123, and a drive wheel 17 is coaxially fixedly connected to the output shaft of the second drive motor 18, and the drive wheel 17 is meshed with the gear 16. The rotation of the second drive motor 18 can drive the roller 15 to rotate. Through the synchronous rotation of multiple rollers 15, the support steel bar 101 can be driven to move. For example, when the support steel bar 101 is transported from the first base 3 to the second base 4, when the mobile vehicle 10 is connected to the second base 4, the second drive motor 18 is operated to move the support steel bar 101 from the guide sleeve 123 to the second base 4 until the support steel bar 101 is positioned in the second base 4. The second drive motor 18 stops running, and the clamping fingers of the clamping cylinder 121 are released, so that the next support steel bar 101 can be transported.

[0047] Reference Figure 5 and Figure 7 A welding assembly 13 is provided on the bottom surface of the mobile vehicle 10 . The welding assembly 13 is arranged between the clamping assembly 12 and the cutting assembly 11 , and can perform positioning welding on the supporting steel bars 101 positioned on the first connecting steel plate 100 .

[0048] Reference Figure 5 and Figure 7The welding assembly 13 includes two parallel slide rails 131, two sliders 132 and two welding guns 133. The two slide rails 131 are fixed on the bottom surface of the mobile vehicle 10. The length direction of the slide rails 131 is parallel to the conveying direction of the supporting steel bar 101. The two sliders 132 are respectively arranged on the two slide rails 131, and the sliders 132 can move along the slide rails 131. A mounting cavity is provided on the bottom surface of each slider 132, and a clamping oil cylinder 20 is provided in the mounting cavity. A mounting plate 19 is fixed on the piston rod of the clamping oil cylinder 20, and the opposite ends of the mounting plate 19 are respectively fixedly connected to the piston rods of the two clamping oil cylinders 20. The two welding guns 133 are hinged at the opposite ends of the mounting plate 19. A push-pull oil cylinder 21 is provided between the two welding guns 133. The push-pull oil cylinder 21 is a double-rod oil cylinder. The piston rod of the double-rod oil cylinder is hinged to the shells of the two welding guns 133, and can drive the two welding guns 133 to move closer to or away from each other. When welding of the support steel bar 101 is required, the piston rod of the pressing oil cylinder 20 is extended, so that the welding gun 133 is moved closer to the support steel bar 101, the piston rod of the push-pull oil cylinder 21 is extended and retracted, and the spacing between the welding guns 133 is adjusted so that the welding gun 133 is inserted into the gap between the support steel bar 101 and the first connecting steel plate 100, the slider 132 moves along the slide rail 131, and the welding gun 133 performs welding at the same time, automatically performing welding of the support steel bar 101 on the first connecting steel plate 100, eliminating the process of manually welding the support steel bar 101 on the first connecting steel plate 100, and improving the welding efficiency of the support steel bar 101. After welding is completed, the piston rod of the push-pull oil cylinder 21 is extended, and the piston rod of the pressing oil cylinder 20 is retracted, and the welding gun 133 is away from the support steel bar 101, so that it is convenient to move to the next welding point for welding.

[0049] Reference Figure 5 and Figure 7 A clamping cylinder 22 is fixed on the mounting plate 19, and a pressing plate 23 is fixed on the piston rod of the clamping cylinder 22. Before welding the support steel bar 101, the piston rod of the clamping cylinder 22 is extended to clamp the support steel bar 101 on the first connecting steel plate 100, thereby improving the stability of the support steel bar 101 during the welding process and improving the welding accuracy of the support steel bar 101.

[0050] The implementation principle of Example 1 of the present invention is as follows: the support steel bar 101 is passed through the first base 3 and inserted into the guide sleeve 123, and the clamping fingers of the clamping finger cylinder 121 are close to each other to clamp the support steel bar 101. The mobile vehicle 10 drives the support steel bar 101 to move toward the second base 4. When the mobile vehicle 10 moves to the end of the second base 4, the second drive motor 18 is operated to transport the support steel bar 101 to the second base 4, so that the support steel bar 101 penetrates into the second base 4. After the positioning of the support steel bar 101 is completed, the piston rod of the first clamping cylinder 7 and the piston rod of the second clamping cylinder 8 are extended to clamp the support steel bar 101 and position it, and the clamping fingers of the clamping finger cylinder 121 are moved away from each other, and the second drive motor 18 stops running. During the resetting process of the mobile vehicle 10, the piston rod of the oil cylinder 20 extends through the connection point between the supporting steel bar 101 and the first connecting steel plate 100, so that the welding gun 133 approaches the supporting steel bar 101, and the push-pull oil cylinder 21 drives the welding gun 133 to move closer or farther away from each other, so that the welding gun 133 and the supporting steel bar 101 are connected to weld the supporting steel bar 101. After completing the welding of the supporting steel bar 101, the mobile vehicle 10 moves to the end of the first base 3, cuts off the supporting steel bar 101, and then moves to the end of the second base 4, the clamping cylinder 121 clamps the supporting steel bar 101 again, the cutting knife 113 cuts off the other end of the supporting steel bar 101, the piston rod of the second clamping cylinder 8 retracts, and the second drive motor 18 operates to remove the waste from the second base 4.

[0051] Embodiment 2:

[0052] Reference Figure 8 and Fig. 9 The difference between Example 2 and Example 1 is that: only one slide rail 131 is provided, and only one slider 132 is provided, which is slidably provided on the slide rail 131. A accommodating cavity is provided on the bottom surface of the slider 132, and a rotating cylinder 24 is fixed in the accommodating cavity. The mounting plate 19 is fixed on the piston rod of the rotating cylinder 24. Only one welding gun 133 is provided, which is hinged at one end of the mounting plate 19. A swing cylinder 25 is hinged on the bottom surface of the mounting plate 19, and the piston rod of the swing cylinder 25 is hinged to the outer shell of the welding gun 133.

[0053] Reference Figure 8 and Fig. 9 When welding the support steel bar 101, the piston rod of the swing cylinder 25 is extended and retracted, the welding gun 133 is adjusted to dock with the support steel bar 101, and the slider 132 slides on the slide rail 131 to weld the support steel bar 101. After completing the welding on one side of the support steel bar 101, the piston rod of the swing cylinder 25 is retracted, so that the distance between the muzzle of the welding gun 133 and the support steel bar 101 is increased, and the rotating cylinder 24 is operated to drive the mounting plate 19 to rotate 180 degrees, and the piston rod of the swing cylinder 25 is extended, so that the welding gun 133 is docked with the support steel bar 101, and the welding on the other side is carried out.

[0054] The implementation principle of Example 2 is different from that of Example 1 only in the welding method, which will not be described in detail.

[0055] Reference Fig.10 The present invention also discloses a pile-pier integrated construction method, which utilizes the connection frame welded by the above-mentioned construction device, and comprises the following steps:

[0056] S100, pre-set prestressed concrete pipe piles, prefabricated connecting frame.

[0057] S200, welding a second connecting steel plate 102 on the outer wall of the prestressed concrete pipe pile;

[0058] S300, insert the prestressed concrete pipe pile vertically into the ground, weld the first connecting steel plate 100 and the second connecting steel plate 102, and fix the connecting frame on the outer wall of the prestressed concrete pipe pile, so that the connecting frame connects adjacent prestressed concrete pipe piles.

[0059] S400, install the mold, pour concrete, and cast the pier.

[0060] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pile-pier integrated construction method, Features: The following steps are included: S100, pre-place concrete pipe piles and pre-fabricate a connecting frame, wherein the connecting frame is welded from a plurality of first connecting steel plates (100) and a plurality of supporting steel bars (101); S200, welding a second connecting steel plate (102) on the outer wall of the concrete pipe pile; S300, vertically inserting the concrete pipe pile into the ground, welding the first connecting steel plate (100) and the second connecting steel plate (102), fixing the connecting frame on the outer side wall of the concrete pipe pile, and the connecting frame connecting adjacent concrete pipe piles; S400, install the mold, pour concrete, and cast the pile pier; A construction device for welding the connecting frame comprises a first guide rail (1) and a second guide rail (2), wherein the first guide rail (1) and the second guide rail (2) are arranged in parallel, a first base (3) is arranged on the first guide rail (1), a first support frame (5) is arranged on the first base (3), and a first clamping member is arranged on the first support frame (5); A second base (4) is provided on the second guide rail (2), a second support frame (6) is provided on the second base (4), a second clamping member is provided on the second support frame (6), a connecting guide rail (9) is provided between the first support frame (5) and the second support frame (6), and a moving vehicle (10) is provided on the connecting guide rail (9); A cutting assembly (11) is provided at one end of the mobile vehicle (10), a clamping assembly (12) is provided at one end of the mobile vehicle (10) away from the cutting assembly (11), and a welding assembly (13) is provided on the mobile vehicle (10), wherein the welding assembly (13) is arranged between the cutting assembly (11) and the clamping assembly (12).

2. The construction method according to claim 1, Features: The concrete pipe piles are prestressed pipe piles (103).

3. The construction method according to claim 1, Features: The cutting assembly (11) comprises a telescopic oil cylinder (111), a connecting plate (112) and a cutting knife (113); the telescopic oil cylinder (111) is arranged in the mobile vehicle (10); the piston rod of the telescopic oil cylinder (111) passes through the mobile vehicle (10); the connecting plate (112) is arranged at one end of the piston rod of the telescopic oil cylinder (111) outside the mobile vehicle (10); the cutting knife (113) is arranged on the connecting plate (112); and a first driving motor (114) for driving the cutting knife (113) to rotate is provided on the connecting plate (112).

4. The construction method according to claim 1, Features: The clamping assembly (12) comprises a clamping cylinder (121), a plurality of clamping blocks (122) and a guide sleeve (123); the clamping cylinder (121) is arranged in the moving vehicle (10); the movable end of the clamping cylinder (121) passes through the moving vehicle (10); the plurality of clamping blocks (122) are arranged at the movable end of the clamping cylinder (121); and the guide sleeve (123) is arranged on the clamping block (122).

5. The construction method according to claim 4, Features: The guide sleeve (123) is penetrated by a plurality of clearance holes (14), each of which is provided with a roller (15), and the rolling direction of the roller (15) is the same as the length direction of the connecting guide rail (9).

6. The construction method according to claim 5, Features: The plurality of rollers (15) are connected to each other via universal joints; a gear (16) is provided on the rotating shaft of the roller (15); a second drive motor (18) is provided on the guide sleeve (123); and a drive wheel (17) meshing with the gear (16) is provided on the output shaft of the second drive motor (18).

7. The construction method according to claim 1, Features: The welding assembly (13) comprises a welding gun (133), a slider (132) and a slide rail (131); the slide rail (131) is arranged on the outer wall of the mobile vehicle (10); the slider (132) is arranged on the slide rail (131); a mounting plate (19) is arranged on the slider (132); and the welding gun (133) is arranged on the mounting plate (19).

8. The construction method according to claim 7, Features: At least two welding guns (133) are provided, and the welding guns (133) are symmetrically arranged on both sides of the mounting plate (19). A push-pull oil cylinder (21) is provided between adjacent welding guns (133). The push-pull oil cylinder (21) is a double-rod oil cylinder. The piston rod of the push-pull oil cylinder (21) is connected to the two welding guns (133) to drive the welding guns (133) to move closer to or farther away from each other. The sliding block (132) is provided with a mounting cavity, a pressing oil cylinder (20) is provided in the mounting cavity, and the mounting plate (19) is arranged on the piston rod of the pressing oil cylinder (20).

9. The construction method according to claim 7, Features: The slider (132) is provided with an accommodating cavity, a rotating cylinder (24) is provided in the accommodating cavity, the mounting plate (19) is arranged on the piston rod of the rotating cylinder (24), the welding gun (133) is hinged on the mounting plate (19), a swing cylinder (25) is provided on the mounting plate (19), and the outer shell of the welding gun (133) is connected to the piston rod of the swing cylinder (25).

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