CN118635735B - A high-efficiency welding device and method for multiple backwash pipes - Google Patents

Abstract

The present invention discloses a highly efficient welding device and method for multiple backwashing pipes, and the present invention relates to the technical field of welding multiple backwashing pipes. A tooling mechanism for tooling multiple backwashing pipes is arranged on a workbench, and multiple connecting pieces are stacked on the workbench and located on the left side of the tooling mechanism. A driving motor located on the right side of the tooling mechanism is fixedly arranged on the bottom surface of the workbench, and the output shaft of the driving motor passes through the workbench upward, and a main shaft is connected to the extension end, a cantilever is fixedly arranged on the top of the main shaft, and a material taking mechanism for grabbing the connecting piece is arranged at the left end of the cantilever, and a welding mechanism is arranged at the right end of the cantilever. The beneficial effects of the present invention are: greatly improving the welding quality of multiple backwashing pipes and greatly improving the welding efficiency of multiple backwashing pipes.

Description

A high-efficiency welding device and method for multiple backwash pipes

Technical Field

The invention relates to the technical field of welding of multiple backwashing pipes, in particular to a device and method for efficiently welding multiple backwashing pipes.

Background Art

In the treatment of farmland sewage, an active granular layer of a certain height is piled in the farmland, and multiple backwashing pipes are inserted in the active granular layer. The structure of the backwashing pipe 1 is shown in Figures 1 and 2. The active granular layer is attached with a material for absorbing nutrient-rich nitrogen in farmland sewage. After the active granular layer has been used for a period of time, clean water is introduced into one port of the backwashing pipe 1, and the clean water is sprayed out from the other port of the backwashing pipe 1, and the sprayed clean water backwashes the active granular layer.

Since the multiple backwash pipes 1 inserted into the active particle layer are independently dispersed, in order to conveniently and quickly insert the backwash pipes into the active particle layer, the workers weld the multiple backwash pipes 1 together to process the required products.

The method for workers to weld multiple backwash pipes 1 together is:

S1. A worker takes out a plurality of backwash pipes 1 and places the plurality of backwash pipes 1 in parallel on a workbench;

S2, a worker places a connecting piece 2 on the top surface of the plurality of backwashing pipes 1, and then spot welds the connecting piece 2 along the length direction by using the spot welding head of the electric welding machine, thereby welding the first connecting piece 2 between the plurality of backwashing pipes 1, as shown in FIG3;

S3, the worker repeats the operation of step S2 for several times, and then welds a plurality of connecting pieces 2 to a plurality of backwash pipes 1, and then processes the required product. The structure of the welded product is shown in FIG4 ;

S4. The worker repeats steps S1 to S3 for multiple times, and then continuously welds and produces multiple products.

However, although this method can weld multiple backwash pipes 1 into one body, thereby producing multiple products, in actual operation, there are still the following technical defects:

I. In step S2, when the spot welding head of the spot welding machine spot welds the connecting piece 2, due to the large number of spot welding positions, the connecting piece 2 is deformed due to heat, resulting in that the multiple backwash pipes 1 are not firmly welded together, thereby greatly reducing the welding quality of the multiple backwash pipes 1.

II. There are many connecting pieces 2 to be welded, and manually welding the connecting pieces 2 to the backwashing pipes 1 not only increases the work intensity of the workers, but also increases the welding time of a single connecting piece 2, thereby reducing the welding efficiency of multiple backwashing pipes 1.

Therefore, there is an urgent need for a welding device and method that can greatly improve the welding quality and efficiency of multiple backwash pipes.

Summary of the invention

The purpose of the present invention is to overcome the shortcomings of the prior art and provide a high-efficiency welding device and method for multiple backwashing pipes, which greatly improves the welding quality and efficiency of multiple backwashing pipes.

The object of the present invention is achieved through the following technical solutions: a high-efficiency welding device for multiple backwashing pipes, comprising a workbench, a tooling mechanism for tooling multiple backwashing pipes is arranged on the workbench, a plurality of connecting pieces are stacked on the workbench and located on the left side of the tooling mechanism, a driving motor located on the right side of the tooling mechanism is fixedly arranged on the bottom surface of the workbench, the output shaft of the driving motor passes through the workbench upward, and a main shaft is connected to the extension end, a cantilever is fixedly arranged on the top end of the main shaft, a material taking mechanism for grabbing the connecting piece is arranged on the left end of the cantilever, and a welding mechanism is arranged on the right end of the cantilever;

The material taking mechanism comprises a left bottom plate fixedly mounted on the bottom surface of the left end portion of the cantilever, a horizontal cylinder fixedly mounted on the bottom surface of the left bottom plate, a piston rod of the horizontal cylinder extending to the left on the left side of the left bottom plate, and a vertical cylinder fixedly mounted on the extending end, a lifting plate fixedly mounted on the action end of the piston rod of the vertical cylinder, a suction head welded inside the lifting plate, and a top port of the suction head connected to a working port of a vacuum pump via a hose;

The welding mechanism includes a right bottom plate fixedly mounted on the bottom surface of the right end portion of the cantilever, two clamping cylinders fixedly mounted on the bottom surface of the right bottom plate, a pressure plate fixedly mounted between the action ends of the piston rods of the two clamping cylinders, a plurality of through holes spaced apart in the pressure plate along its length direction, a welding cylinder fixedly mounted on the top surface of the right bottom plate, the piston rod of the welding cylinder downwardly penetrates the right bottom plate, and a mounting plate fixedly mounted on the extending end, the mounting plate being located directly above the pressure plate, a plurality of spot welding heads fixedly mounted in the mounting plate along its length direction and respectively located directly above the through holes, the top end of each spot welding head being respectively connected to a spot welding machine.

The tooling mechanism includes a feed cylinder fixed on the workbench surface, a connecting seat fixed on the active end of the feed cylinder piston rod, a sliding seat fixed on the top surface of the connecting seat, and a positioning groove for accommodating multiple backwashing pipes is opened on the top surface of the sliding seat along its length direction.

The tooling mechanism also includes two guide rails fixed on the workbench surface, both guide rails are arranged longitudinally, two brackets located on the left and right sides of the connecting seat are fixed on the bottom surface of the sliding seat, and sliding blocks are fixed on the bottom surfaces of the two brackets, and the two sliding blocks are slidably installed on the two guide rails respectively.

Cylinders are fixedly arranged on the bottom surfaces of the left and right ends of the cantilever, and the left bottom plate and the right bottom plate are fixedly arranged on the bottom surfaces of the two cylinders respectively.

The distance between every two adjacent through holes is equal, and the distance between every two adjacent spot welding heads is equal.

A plurality of supporting legs supported on the ground are fixedly arranged on the bottom surface of the workbench.

The welding device also includes a controller, which is electrically connected to a driving motor, a vertical cylinder, a horizontal cylinder, a vacuum pump, a pressing cylinder and a welding cylinder via a signal line.

A method for efficiently welding multiple backwash pipes comprises the following steps:

S1. A worker takes out a plurality of backwashing pipes to be welded, and inserts the plurality of backwashing pipes into the positioning grooves of the slide seat of the tooling mechanism, so that the positioning grooves are filled with the backwashing pipes, thereby realizing the installation of the plurality of backwashing pipes;

S2. Place the first connecting piece on the top surface of the backwash pipe. The specific operation steps are as follows:

S21, controlling the piston rod of the vertical cylinder of the material taking mechanism to extend downward, the piston rod drives the lifting plate to move downward, the lifting plate drives the suction head to move downward, the suction head moves toward the topmost connecting piece, when the bottom surface of the suction head contacts the topmost connecting piece, the vacuum pump is controlled to start, the vacuum pump evacuates the suction head, and under negative pressure, the topmost connecting piece is adsorbed and fixed on the suction head;

S22, control the piston rod of the vertical cylinder to retract upward, the piston rod drives the lifting plate to move upward, the lifting plate drives the suction head to move upward, the suction head drives the sucked connecting piece to move upward, thereby lifting the connecting piece;

S23, the piston rod of the horizontal cylinder of the control material taking mechanism is retracted to the right, and the piston rod drives the vertical cylinder and the suction head to move to the right synchronously, thereby driving the connecting piece to move to the right. When the piston rod of the horizontal cylinder is fully retracted, the connecting piece just moves to the top surface of the backwash pipe;

S24, controlling the piston rod of the vertical cylinder to extend downward, the piston rod drives the lifting plate to move downward, the lifting plate drives the suction head to move downward, and the suction head drives the adsorbed connecting piece to move downward, so that the connecting piece contacts the top surface of the backwash pipe;

S25, control the vacuum pump to turn off, so that the suction head no longer absorbs the connecting piece; then control the piston rod of the vertical cylinder to retract upward, and the piston rod drives the suction head to move upward; then control the piston rod of the horizontal cylinder to extend to the left, and the piston rod drives the vertical cylinder and the suction head to move to the left synchronously, so that the suction head moves to the initial position, and finally realizes the placement of the first connecting piece on the top surface of the backwash pipe;

S3. The specific operation steps of welding the first connecting piece to multiple backwash pipes are as follows:

S31, control the drive motor to start, the drive motor drives the main shaft to rotate, the main shaft drives the cantilever to rotate on the horizontal plane, the cantilever drives the material taking mechanism and the welding mechanism to rotate synchronously, when the welding mechanism rotates 180°, the controller controls the drive motor to turn off, at this time, the welding mechanism is just above the connecting piece;

S32, the piston rods of the two clamping cylinders of the control welding mechanism are extended downward, and the piston rods drive the pressing plate to move toward the connecting piece. When the piston rods of the clamping cylinders are fully extended, the pressing plate fixes the connecting piece between the pressing plate and the backwashing pipe. At this time, each through hole in the pressing plate corresponds to each backwashing pipe respectively.

S33, the piston rod of the welding cylinder of the control welding mechanism extends downward, the piston rod drives the mounting plate to move downward, the mounting plate drives the multiple spot welding heads thereon to move downward, the multiple spot welding heads respectively pass through the respective through holes and then contact the connecting piece, thereby welding the first connecting piece between the multiple backwashing pipes;

S4. The worker controls the piston rod of the welding cylinder to retract upward, and the piston rod drives the mounting plate to move upward, and the mounting plate drives each spot welding head to move upward, and then controls the piston rod of the clamping cylinder to retract upward, and the piston rod drives the pressing plate to move upward; then controls the piston rod of the feed cylinder to move forward, and the piston rod of the feed cylinder drives the connecting seat to move forward, and the connecting seat drives the slide seat to move forward along the guide rail, and the slide seat drives the multiple backwashing pipes therein to move forward synchronously. When the piston rod of the feed cylinder is extended to the set stroke, the controller controls the feed cylinder to close, and at this time, the multiple backwashing pipes enter the second welding station;

S5. The worker repeats the operations of steps S2 to S3 to weld the second connecting piece between the multiple backwash pipes;

S6. The worker repeats the operations of steps S4 to S5 to continuously weld multiple connecting pieces between multiple backwash pipes, thereby producing the desired product. After welding, the worker takes the product out of the slide seat.

S7: The worker performs steps S1 to S6 for multiple times to continuously produce multiple required products.

The invention has the following advantages: greatly improving the welding quality of multiple backwashing pipes and greatly improving the welding efficiency of multiple backwashing pipes.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the structure of the backwash pipe;

FIG2 is a top view of FIG1 ;

FIG3 is a schematic diagram of welding the first connecting piece between multiple backwash pipes;

FIG4 is a schematic diagram of the structure of the welded product;

FIG5 is a schematic diagram of the structure of the present invention;

Fig. 6 is a cross-sectional view taken along line A-A of Fig. 5;

Figure 7 is a schematic diagram of the structure of the tooling mechanism;

FIG8 is a top view of FIG7;

FIG9 is a schematic diagram of the connection between the drive motor, the spindle, the material taking mechanism and the welding mechanism;

FIG10 is a schematic structural diagram of a pressing plate;

FIG11 is a top view of FIG10 ;

FIG12 is a schematic diagram of installing multiple backwash pipes;

Fig. 13 is a cross-sectional view taken along line B-B of Fig. 12;

FIG14 is a schematic diagram showing the bottom surface of the suction head in contact with the topmost connecting sheet;

FIG15 is a schematic diagram of lifting the connecting piece;

FIG16 is a schematic diagram showing that the connecting piece just moves onto the top surface of the backwash pipe;

FIG17 is a schematic diagram of placing a first connecting piece on the top surface of the backwash pipe;

Fig. 18 is a cross-sectional view taken along line C-C of Fig. 17;

FIG19 is a schematic diagram showing that the welding mechanism is located just above the connecting piece;

FIG20 is a schematic diagram of a pressing plate fixing a connecting piece between the pressing plate and the backwashing pipe;

FIG21 is a schematic diagram of welding a first connecting piece between a plurality of backwash pipes;

FIG22 is a schematic diagram of multiple backwash pipes entering the second welding station;

In the figure:

1-backwash pipe, 2-connecting piece, 3-workbench, 4-tooling mechanism, 5-drive motor, 6-spindle, 7-cantilever, 8-feeding mechanism, 9-welding mechanism;

10-left bottom plate, 11-horizontal cylinder, 12-vertical cylinder, 13-lifting plate, 14-suction head;

15-right bottom plate, 16-pressing cylinder, 17-pressing plate, 18-through hole, 19-welding cylinder, 20-mounting plate, 21-spot welding head;

22-feed cylinder, 23-connecting seat, 24-sliding seat, 25-positioning groove, 26-guide rail, 27-bracket, 28-sliding block.

DETAILED DESCRIPTION

The present invention is further described below in conjunction with the accompanying drawings, and the protection scope of the present invention is not limited to the following:

As shown in Figures 5 to 11, a high-efficiency welding device for multiple backwashing pipes includes a workbench 3, on which a fixture mechanism 4 for fixture multiple backwashing pipes 1 is provided, a plurality of connecting plates 2 are stacked on the workbench 3 and on the left side of the fixture mechanism 4, a driving motor 5 located on the right side of the fixture mechanism 4 is fixedly provided on the bottom surface of the workbench 3, the output shaft of the driving motor 5 passes through the workbench 3 upward, and a main shaft 6 is connected to the extended end, a cantilever 7 is fixedly provided at the top end of the main shaft 6, a material picking mechanism 8 for grabbing the connecting plate 2 is provided at the left end of the cantilever 7, and a welding mechanism 9 is provided at the right end of the cantilever 7; a plurality of supporting legs supported on the ground are fixedly provided on the bottom surface of the workbench 3.

The material taking mechanism 8 comprises a left bottom plate 10 fixedly mounted on the bottom surface of the left end portion of the cantilever 7, a horizontal cylinder 11 fixedly mounted on the bottom surface of the left bottom plate 10, a piston rod of the horizontal cylinder 11 extending to the left on the left side of the left bottom plate 10, and a vertical cylinder 12 fixedly mounted on the extending end, a lifting plate 13 fixedly mounted on the active end of the piston rod of the vertical cylinder 12, a suction head 14 welded inside the lifting plate 13, and a top port of the suction head 14 connected to a working port of a vacuum pump via a hose;

The welding mechanism 9 includes a right bottom plate 15 fixed on the bottom surface of the right end of the cantilever 7, two clamping cylinders 16 fixed on the bottom surface of the right bottom plate 15, a clamping plate 17 fixed between the action ends of the piston rods of the two clamping cylinders 16, a plurality of through holes 18 are provided in the clamping plate 17 along its length direction, and the spacing between each adjacent two through holes 18 is equal, a welding cylinder 19 is fixed on the top surface of the right bottom plate 15, the piston rod of the welding cylinder 19 passes through the right bottom plate 15 downward, and a mounting plate 20 is fixed on the extended end, the mounting plate 20 is located directly above the clamping plate 17, and a plurality of spot welding heads 21 are fixed in the mounting plate 20 along its length direction, respectively located directly above the through holes 18, and the spacing between each adjacent two spot welding heads 21 is equal, and the top end of each spot welding head 21 is connected to a spot welding machine. Cylinders are fixed on the bottom surfaces of the left and right ends of the cantilever 7, and the left bottom plate 10 and the right bottom plate 15 are respectively fixed on the bottom surfaces of the two cylinders.

The tooling mechanism 4 includes a feed cylinder 22 fixedly mounted on the workbench 3, a connecting seat 23 fixedly mounted on the active end of the piston rod of the feed cylinder 22, a sliding seat 24 fixedly mounted on the top surface of the connecting seat 23, and a positioning groove 25 for accommodating multiple backwashing pipes 1 is opened on the top surface of the sliding seat 24 along its length direction.

The tooling mechanism 4 also includes two guide rails 26 fixed on the surface of the workbench 3, and the two guide rails 26 are both arranged longitudinally. Two brackets 27 located on the left and right sides of the connecting seat 23 are fixed on the bottom surface of the slide seat 24, and sliding blocks 28 are fixed on the bottom surfaces of the two brackets 27. The two sliding blocks 28 are respectively slidably installed on the two guide rails 26.

The welding device also includes a controller, which is electrically connected to the drive motor 5, the vertical cylinder 12, the horizontal cylinder 11, the vacuum pump, the clamping cylinder 16 and the welding cylinder 19 via a signal line. Workers can use the controller to control the extension or retraction of the piston rods of the vertical cylinder 12, the horizontal cylinder 11, the clamping cylinder 16 and the welding cylinder 19, and can also control the start or shut down of the drive motor 5 and the vacuum pump, thereby facilitating the workers' operation and having the characteristic of a high degree of automation.

A method for efficiently welding multiple backwash pipes comprises the following steps:

S1. A worker takes out a plurality of backwashing pipes 1 to be welded as shown in FIGS. 1 and 2 , and inserts the plurality of backwashing pipes 1 into the positioning grooves 25 of the slide seat 24 of the tooling mechanism 4 so that the positioning grooves 25 are filled with the backwashing pipes 1 , thereby realizing the installation of the plurality of backwashing pipes 1 , as shown in FIGS. 12 and 13 ;

S2. Place the first connecting piece 2 on the top surface of the backwash pipe 1. The specific operation steps are as follows:

S21, control the piston rod of the vertical cylinder 12 of the material taking mechanism 8 to extend downward, the piston rod drives the lifting plate 13 to move downward, the lifting plate 13 drives the suction head 14 to move downward, the suction head 14 moves toward the topmost connecting piece 2, when the bottom surface of the suction head 14 contacts the topmost connecting piece 2, as shown in FIG14, control the vacuum pump to start, the vacuum pump evacuates the suction head 14, under negative pressure, the topmost connecting piece 2 is adsorbed and fixed to the suction head 14;

S22, control the piston rod of the vertical cylinder 12 to retract upward, the piston rod drives the lifting plate 13 to move upward, the lifting plate 13 drives the suction head 14 to move upward, the suction head 14 drives the sucked connecting piece 2 to move upward, thereby lifting the connecting piece 2, as shown in FIG15;

S23, the piston rod of the horizontal cylinder 11 of the material taking mechanism 8 is retracted to the right, and the piston rod drives the vertical cylinder 12 and the suction head 14 to move to the right synchronously, thereby driving the connecting piece 2 to move to the right. When the piston rod of the horizontal cylinder 11 is fully retracted, the connecting piece 2 just moves to the top surface of the backwashing pipe 1, as shown in FIG16;

S24, control the piston rod of the vertical cylinder 12 to extend downward, the piston rod drives the lifting plate 13 to move downward, the lifting plate 13 drives the suction head 14 to move downward, and the suction head 14 drives the adsorbed connecting piece 2 to move downward, so that the connecting piece 2 contacts the top surface of the backwash pipe 1;

S25, control the vacuum pump to turn off, and the suction head 14 no longer absorbs the connecting piece 2; then control the piston rod of the vertical cylinder 12 to retract upward, and the piston rod drives the suction head 14 to move upward; then control the piston rod of the horizontal cylinder 11 to extend to the left, and the piston rod drives the vertical cylinder 12 and the suction head 14 to move to the left synchronously, so that the suction head 14 moves to the initial position, and finally realizes the placement of the first connecting piece 2 on the top surface of the backwash pipe 1, as shown in Figures 17 and 18;

S3, welding of the first connecting piece 2 and the plurality of backwashing pipes 1, the specific operation steps are as follows:

S31, control the drive motor 5 to start, the drive motor 5 drives the main shaft 6 to rotate, the main shaft 6 drives the cantilever 7 to rotate on the horizontal plane, the cantilever 7 drives the material taking mechanism 8 and the welding mechanism 9 to rotate synchronously, when the welding mechanism 9 rotates 180°, the controller controls the drive motor 5 to turn off, at this time, the welding mechanism 9 is just above the connecting piece 2, as shown in FIG19;

S32, the piston rods of the two pressing cylinders 16 of the control welding mechanism 9 are extended downward, and the piston rods drive the pressing plate 17 to move toward the connecting piece 2. When the piston rods of the pressing cylinders 16 are fully extended, the pressing plate 17 fixes the connecting piece 2 between the pressing plate 17 and the backwashing pipe 1, as shown in FIG. 20. At this time, each through hole 18 in the pressing plate 17 corresponds to each backwashing pipe 1 respectively.

S33, the piston rod of the welding cylinder 19 of the control welding mechanism 9 extends downward, the piston rod drives the mounting plate 20 to move downward, the mounting plate 20 drives the multiple spot welding heads 21 thereon to move downward, the multiple spot welding heads 21 respectively pass through the respective through holes 18 and then contact the connecting piece 2, so that the first connecting piece 2 is welded between the multiple backwashing pipes 1, as shown in FIG21;

Among them, it can be seen from step S3 that when the welding device is welding multiple backwashing pipes 1, the pressing plate 17 first presses the connecting piece 2 so that the connecting piece 2 is pressed between the pressing plate 17 and the backwashing pipe 1, thereby effectively avoiding the multiple spot welding heads 21 from being deformed by the heat when contacting the connecting piece 2, thereby ensuring that the multiple backwashing pipes 1 are firmly welded together. It can be seen that compared with ordinary welding methods, the welding device of the present invention greatly improves the welding quality of multiple backwashing pipes 1.

S4, the worker controls the piston rod of the welding cylinder 19 to retract upward, the piston rod drives the mounting plate 20 to move upward, the mounting plate 20 drives each spot welding head 21 to move upward, and then controls the piston rod of the clamping cylinder 16 to retract upward, the piston rod drives the pressing plate 17 to move upward; then controls the piston rod of the feed cylinder 22 to move forward, the piston rod of the feed cylinder 22 drives the connecting seat 23 to move forward, the connecting seat 23 drives the slide seat 24 to move forward along the guide rail 26, the slide seat 24 drives the multiple backwashing pipes 1 therein to move forward synchronously, when the piston rod of the feed cylinder 22 extends to the set stroke, the controller controls the feed cylinder 22 to close, at this time, the multiple backwashing pipes 1 enter the second welding station, as shown in FIG22;

S5. The worker repeats the operations of steps S2 to S3 to weld the second connecting piece 2 between the multiple backwash pipes 1;

S6. The worker repeats the operations of steps S4 to S5 to continuously weld multiple connecting pieces 2 between multiple backwash pipes 1, thereby producing the desired product. The structure of the welded product is shown in FIG. 4 . After welding, the worker takes the product out of the slide seat 24 .

S7: The worker performs steps S1 to S6 for multiple times to continuously produce multiple required products.

Among them, it can be seen from steps S2~S6 that the present welding device can automatically place the connecting pieces 2 between multiple backwashing pipes 1 one by one through the linkage cooperation of the vertical cylinder 12, the horizontal cylinder 11 and the feed cylinder 22 of the material taking mechanism 8, without the need for manual placement of the connecting pieces 2, thereby greatly reducing the work intensity of the workers. In addition, it also shortens the subsequent welding time of the connecting pieces 2, thereby greatly improving the welding efficiency of multiple backwashing pipes 1.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (2)

1. A high-efficiency welding device for multiple backwashing pipes, characterized in that it comprises a workbench (3), the workbench (3) is provided with a tooling mechanism (4) for tooling multiple backwashing pipes (1), a plurality of connecting pieces (2) are stacked on the workbench (3) and located on the left side of the tooling mechanism (4), a driving motor (5) is fixedly arranged on the bottom surface of the workbench (3) and located on the right side of the tooling mechanism (4), the output shaft of the driving motor (5) passes through the workbench (3) in an upward direction, and a main shaft (6) is connected to the extended end, a cantilever (7) is fixedly arranged at the top end of the main shaft (6), a material taking mechanism (8) for grabbing the connecting piece (2) is arranged at the left end of the cantilever (7), and a welding mechanism (9) is arranged at the right end of the cantilever (7); The material taking mechanism (8) comprises a left bottom plate (10) fixedly mounted on the bottom surface of the left end portion of the cantilever (7), and a horizontal cylinder (11) fixedly mounted on the bottom surface of the left bottom plate (10); a piston rod of the horizontal cylinder (11) extends leftward to the left side of the left bottom plate (10), and a vertical cylinder (12) is fixedly mounted on the extended end; a lifting plate (13) is fixedly mounted on the active end of the piston rod of the vertical cylinder (12); a suction head (14) is welded inside the lifting plate (13); and a top port of the suction head (14) is connected to a working port of a vacuum pump via a hose; The welding mechanism (9) comprises a right bottom plate (15) fixedly mounted on the bottom surface of the right end portion of the cantilever (7), two clamping cylinders (16) fixedly mounted on the bottom surface of the right bottom plate (15), a pressing plate (17) fixedly mounted between the action ends of the piston rods of the two clamping cylinders (16), a plurality of through holes (18) spaced apart in the pressing plate (17) along its length direction, a welding cylinder (19) fixedly mounted on the top surface of the right bottom plate (15), a piston rod of the welding cylinder (19) penetrating downwardly through the right bottom plate (15), and a mounting plate (20) fixedly mounted on the extended end, the mounting plate (20) being located directly above the pressing plate (17), a plurality of spot welding heads (21) respectively located directly above the through holes (18) being fixedly mounted in the mounting plate (20) along its length direction, the top end of each spot welding head (21) being respectively connected to a spot welding machine; The tooling mechanism (4) comprises a feed cylinder (22) fixedly mounted on the workbench (3), a connecting seat (23) fixedly mounted on the working end of the piston rod of the feed cylinder (22), a sliding seat (24) fixedly mounted on the top surface of the connecting seat (23), and a positioning groove (25) for accommodating a plurality of backwashing pipes (1) is formed on the top surface of the sliding seat (24) along its length direction; The tooling mechanism (4) further comprises two guide rails (26) fixedly mounted on the surface of the workbench (3), the two guide rails (26) being arranged longitudinally, two brackets (27) located on the left and right sides of the connecting seat (23) being fixedly mounted on the bottom surface of the slide seat (24), sliding blocks (28) being fixedly mounted on the bottom surfaces of the two brackets (27), the two sliding blocks (28) being slidably mounted on the two guide rails (26) respectively; The bottom surfaces of the left and right ends of the cantilever (7) are both fixed with cylinders, and the left bottom plate (10) and the right bottom plate (15) are respectively fixed on the bottom surfaces of the two cylinders; the spacing between each two adjacent through holes (18) is equal, and the spacing between each two adjacent spot welding heads (21) is equal; and a plurality of support legs supported on the ground are fixed on the bottom surface of the workbench (3); The welding device also includes a controller, which is electrically connected to the drive motor (5), the vertical cylinder (12), the horizontal cylinder (11), the vacuum pump, the pressing cylinder (16) and the welding cylinder (19) via signal lines. 2. A method for efficiently welding multiple backwash pipes, using the device for efficiently welding multiple backwash pipes according to claim 1, characterized in that it comprises the following steps: S1. A worker takes out a plurality of backwashing pipes (1) to be welded, and inserts the plurality of backwashing pipes (1) into the positioning grooves (25) of the slide seat (24) of the tooling mechanism (4), so that the positioning grooves (25) are filled with the backwashing pipes (1), thereby achieving the installation of the plurality of backwashing pipes (1); S2. Place the first connecting piece (2) on the top surface of the backwash pipe (1). The specific operation steps are as follows: S21, controlling the piston rod of the vertical cylinder (12) of the material taking mechanism (8) to extend downward, the piston rod drives the lifting plate (13) to move downward, the lifting plate (13) drives the suction head (14) to move downward, the suction head (14) moves toward the topmost connecting piece (2), when the bottom surface of the suction head (14) contacts the topmost connecting piece (2), controlling the vacuum pump to start, the vacuum pump evacuates the suction head (14), and under negative pressure, the topmost connecting piece (2) is adsorbed and fixed to the suction head (14); S22, controlling the piston rod of the vertical cylinder (12) to retract upward, the piston rod drives the lifting plate (13) to move upward, the lifting plate (13) drives the suction head (14) to move upward, and the suction head (14) drives the sucked connecting piece (2) to move upward, thereby lifting the connecting piece (2); S23, the piston rod of the horizontal cylinder (11) of the material taking mechanism (8) is controlled to retract to the right, and the piston rod drives the vertical cylinder (12) and the suction head (14) to move to the right synchronously, thereby driving the connecting piece (2) to move to the right. When the piston rod of the horizontal cylinder (11) is completely retracted, the connecting piece (2) just moves to the top surface of the backwashing pipe (1); S24, controlling the piston rod of the vertical cylinder (12) to extend downward, the piston rod drives the lifting plate (13) to move downward, the lifting plate (13) drives the suction head (14) to move downward, and the suction head (14) drives the sucked connecting piece (2) to move downward, so that the connecting piece (2) contacts the top surface of the backwash pipe (1); S25, controlling the vacuum pump to be turned off, so that the suction head (14) no longer absorbs the connecting piece (2); then controlling the piston rod of the vertical cylinder (12) to retract upward, so that the piston rod drives the suction head (14) to move upward; then controlling the piston rod of the horizontal cylinder (11) to extend leftward, so that the piston rod drives the vertical cylinder (12) and the suction head (14) to move leftward synchronously, so that the suction head (14) moves to the initial position, thereby finally achieving the placement of the first connecting piece (2) on the top surface of the backwashing pipe (1); S3. Welding the first connecting piece (2) to the plurality of backwashing pipes (1), the specific operation steps are as follows: S31, controlling the drive motor (5) to start, the drive motor (5) drives the main shaft (6) to rotate, the main shaft (6) drives the cantilever (7) to rotate on the horizontal plane, the cantilever (7) drives the material taking mechanism (8) and the welding mechanism (9) to rotate synchronously, and when the welding mechanism (9) rotates 180°, the controller controls the drive motor (5) to turn off, at which time, the welding mechanism (9) is just above the connecting piece (2); S32, the piston rods of the two pressing cylinders (16) of the control welding mechanism (9) extend downward, and the piston rods drive the pressing plate (17) to move toward the connecting piece (2). When the piston rods of the pressing cylinders (16) are fully extended, the pressing plate (17) fixes the connecting piece (2) between the pressing plate (17) and the backwashing pipe (1). At this time, each through hole (18) in the pressing plate (17) corresponds to each backwashing pipe (1). S33, the piston rod of the welding cylinder (19) of the control welding mechanism (9) extends downward, the piston rod drives the mounting plate (20) to move downward, the mounting plate (20) drives the plurality of spot welding heads (21) thereon to move downward, the plurality of spot welding heads (21) respectively pass through the respective through holes (18) and then contact the connecting piece (2), thereby welding the first connecting piece (2) between the plurality of backwashing pipes (1); S4. The worker controls the piston rod of the welding cylinder (19) to retract upward, and the piston rod drives the mounting plate (20) to move upward. The mounting plate (20) drives each spot welding head (21) to move upward. Then, the worker controls the piston rod of the clamping cylinder (16) to retract upward, and the piston rod drives the pressing plate (17) to move upward. Then, the worker controls the piston rod of the feed cylinder (22) to move forward, and the piston rod of the feed cylinder (22) drives the connecting seat (23) to move forward. The connecting seat (23) drives the slide seat (24) to move forward along the guide rail (26). The slide seat (24) drives the multiple backwashing pipes (1) therein to move forward synchronously. When the piston rod of the feed cylinder (22) extends to the set stroke, the controller controls the feed cylinder (22) to close. At this time, the multiple backwashing pipes (1) enter the second welding station. S5. The worker repeats the operations of steps S2 to S3 to weld the second connecting piece (2) between the plurality of backwash pipes (1); S6. The worker repeats the operations of steps S4 to S5 to continuously weld the plurality of connecting pieces (2) between the plurality of backwash pipes (1), thereby producing the desired product. After welding, the worker takes the product out of the slide seat (24); S7: The worker performs steps S1 to S6 for multiple times to continuously produce multiple required products.