Valve welding equipment

Abstract

The invention belongs to the technical field of welding equipment, and particularly relates to valve welding equipment which comprises a bottom plate, a supporting assembly is arranged at the upper end of the bottom plate and comprises three cylindrical wheels, the two cylindrical wheels located on the two sides are higher than the cylindrical wheel located in the middle, and welding assemblies are arranged on the two sides of the bottom plate correspondingly. The welding assembly comprises a welding head located on one side of the upper end of the supporting assembly, the welding head is connected with a welding laser through a wire harness, the welding head is installed at the upper end of the bottom plate through a supporting column, and a positioning assembly is arranged at the upper end of the supporting assembly and comprises a plurality of first cylindrical strips. Second rectangular holes are formed in the middles of the first cylindrical strips correspondingly, second rectangular strips are slidably connected into the second rectangular holes correspondingly, and the problem that when a valve body of a valve is welded, a pipe head and a pipe body need to be manually aligned, whether the pipe head and the pipe body completely coincide or not needs to be observed with naked eyes for welding, and certain errors possibly exist is solved; therefore, the qualified rate of product quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of welding equipment, in particular to a valve welding equipment. Background Art

[0002] As an important part of the valve, the valve body has the function of connecting pipes. Usually, the connecting pipes are connected to other pipes by flanges, and the connecting pipes on the valve body are generally connected by welding. However, the existing valve body structures are mostly tubular. In the manufacturing process of the valve body, a pipe body and a pipe head are usually required. Intersecting lines are set on the pipe body and the pipe head. The intersecting lines need to be butt-jointed during welding, where the intersecting line refers to a spatial curve whose orthographic projection is a circle.

[0003] A patent with publication number CN117984004B discloses a welding device for valve production, including a bracket, a first adjusting member and a second adjusting member. When producing the valve, the first clamping member is first used to clamp the pipe body in a horizontal state, and the second clamping member is used to clamp the pipe head in a vertical state. When the second clamping member clamps the pipe head, the pipe head can still rotate around its own axis. The pipe head is adjusted by the first adjusting member to ensure that the intersection line on the pipe head is in a stable state.

[0004] In the above-mentioned prior art, when welding a circular tubular valve body, the tube head and the tube body are both circular tubes, and the tube head needs to be completely overlapped in the vertical direction of the tube body. The prior art needs to continuously adjust the position of the tube head and the tube body before welding, and needs to observe whether they are completely fitted. Since the tube head and the tube body are both circular tubes and the contact surface is an arc surface, there may be certain errors when adjusting the fit, thereby reducing the product qualification rate.

[0005] To this end, the present invention provides a valve welding device. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a valve welding device described in the present invention includes a base plate, a support assembly is provided at the upper end of the base plate, the support assembly includes three cylindrical wheels, the two cylindrical wheels located on both sides are higher than the cylindrical wheel located in the middle, welding assemblies are respectively provided on both sides of the base plate, the welding assembly includes a welding head located on one side of the upper end of the support assembly, the welding head adopts a laser welding head, the welding head is connected to the welding laser through a wiring harness, the welding head is installed at the upper end of the base plate through a support column, a positioning assembly is provided at the upper end of the support assembly, the positioning assembly includes a plurality of first cylindrical bars, second rectangular holes are respectively provided in the middle of the first cylindrical bars, second rectangular bars are respectively slidably connected inside the second rectangular holes, the upper ends of the first cylindrical bars are commonly slidably connected to the first circular plate, and the first circular plate is connected to the base plate through a U-shaped support frame.

[0008] Preferably, the first cylindrical bars are respectively located at the four corners of the edge of the first circular plate, the upper end of the first circular plate is fixedly connected to the second circular plate, the upper end of the second circular plate is fixedly connected to the output end of the hydraulic rod, and the hydraulic rod is fixedly connected to the middle of the U-shaped support frame.

[0009] Preferably, the lower end of the second circular plate is slidably connected to a third ring, the lower ends of both sides of the third ring are respectively fixedly connected to second electric telescopic rods, the output ends of the second electric telescopic rods are respectively fixedly connected to third slide rails, the lower ends of the third slide rails are respectively slidably connected to third sliders, and the opposite sides of the third sliders are respectively fixedly connected to clamping plates.

[0010] Preferably, a second rectangular hole is provided in the middle of each of the first cylindrical bars, a second cylindrical bar is fixedly connected to the middle of the lower end of the first circular plate, the second cylindrical bar is located in the middle of a number of first cylindrical bars, two groups of rotating components are slidably arranged on the outer side of the second cylindrical bar, the rotating components include a fourth ring slidably arranged on the outer side of the second cylindrical bar, a fifth ring is rotatably connected to the outer side of the fourth ring, connecting rods are rotatably connected on both sides of the fifth ring, and ends of the connecting rods are rotatably connected to the second rectangular bars.

[0011] Preferably, the supporting assembly also includes a first rectangular block located in the middle and rotatably connected at both ends of the cylindrical wheel, the lower ends of the first rectangular blocks are fixedly connected with U-shaped bars, the U-shaped bars are fixedly connected to the bottom plate, first rectangular holes are respectively provided on both sides of the upper end of the U-shaped bar, the two ends of the cylindrical wheels located on both sides are rotatably connected with the first rectangular bars, the first rectangular bars can slide in the first rectangular holes respectively, a bidirectional screw rod is commonly threadedly connected to the middle part of the first rectangular bar, one end of the bidirectional screw rod is fixedly connected to a motor, and the motor is fixed to the U-shaped bar through a motor seat.

[0012] Preferably, an extrusion assembly is provided on one side of the U-shaped bar, and the extrusion assembly includes a first electric telescopic rod fixedly connected to the upper end of the base plate, a first cylindrical rod is fixedly connected to one side of the output end of the first electric telescopic rod, and second cylindrical rods are slidably connected to the opposite sides of the two first cylindrical rods.

[0013] Preferably, a first ring is fixedly connected to one end of the outer side of the second cylindrical rod, the first ring is fixedly connected to a second ring via a first spring, and the second ring can slide on the outer side of the second cylindrical rod.

[0014] Preferably, the lower ends of the support columns are respectively fixedly connected to the first slides, the lower ends of the first slides are respectively slidably connected to the first slide rails, the first slide rails are fixedly connected to the base plate, the upper ends of the support columns are respectively fixedly connected to the second slide rails, one side of the second slide rails is respectively slidably connected to the second slide, one side of the second slide is respectively rotatably connected to a mounting frame, one side of the mounting frame is respectively installed with an arc-shaped slide rail, and a welding head is slidably arranged in the arc-shaped slide rail.

[0015] Preferably, mounting blocks are respectively mounted on the upper ends of the mounting frames by means of bolts, and one side of the mounting blocks is respectively fixedly connected to the arc-shaped slide rails.

[0016] Preferably, cylinders are slidably connected in the arc-shaped slide rails, and the cylinders are fixedly connected with welding heads via second springs, and the welding heads can slide in the cylinders.

[0017] The beneficial effects of the present invention are as follows: 1. A valve welding device described in the present invention drives the clamping plate to drive the pipe head to rotate by sliding two groups of second rectangular bars in opposite directions at the same time, so that the second rectangular bars can be located at point B of the pipe head, and drives the first cylindrical rod to drive the second cylindrical rod to rotate on one side of the first electric telescopic rod, so that a group of second rectangular bars located at the lower end can be located at point A of the pipe body, and can automatically adjust the pipe head and the pipe body so that the pipe head and the pipe body completely overlap, which solves the problem that when welding the valve body, the prior art needs to constantly adjust the position of the pipe head and the pipe body before welding, and needs to observe whether they are completely fitted. Since the pipe head and the pipe body are both in the shape of round tubes and the contact surface is an arc surface, there may be a certain error problem when adjusting the fit, thereby improving the product quality pass rate.

[0018] 2. The valve welding equipment described in the present invention can move the tube body to a central position by driving the two second cylindrical rods to slide toward the middle at the same time on the outside of the first cylindrical rod until the second ring contacts the edges of both ends of the tube body and squeezes the first spring at the same time, thereby fixing the tube body more firmly to prevent shaking during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 is a three-dimensional diagram of the first embodiment of the present invention; Figure 2 is a schematic diagram of the support component structure; Figure 3 It is a schematic diagram of the welding assembly structure; Figure 4 is a schematic diagram of the positioning component structure; Figure 5 is a schematic diagram of the position of the second rectangular strip; Figure 6 It is a schematic diagram of the position of the arc slide rail; Figure 7 is a schematic diagram of the position of the second ring; Figure 8 Schematic diagram of the position of the tube head and the tube body In the figure: 1, cylindrical wheel; 11, first rectangular bar; 12, U-shaped bar; 121, first rectangular hole; 123, bidirectional screw rod; 124, motor; 13, first electric telescopic rod; 131, first cylindrical rod; 132, second cylindrical rod; 1321, first ring; 1322, first spring; 1323, second ring; 14, first rectangular block; 2, support column; 21, first slide; 211, first slide rail; 22, second slide rail; 221, second slide; 222, mounting frame; 223, mounting Block; 224, arc-shaped slide rail; 3, welding head; 31, second spring; 32, cylinder; 4, first cylindrical strip; 41, first circular plate; 42, second circular plate; 43, third circular ring; 431, second electric telescopic rod; 432, third slide rail; 433, third slider; 434, clamping plate; 44, second rectangular hole; 45, second cylindrical strip; 451, fourth circular ring; 452, fifth circular ring; 453, connecting rod; 454, second rectangular strip; 46, hydraulic rod; 47, U-shaped support frame; 5, bottom plate. DETAILED DESCRIPTION

[0021] 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.

[0022] Embodiment 1: Figure 1-Figure 6 , Figure 8As shown, a valve welding device described in an embodiment of the present invention includes a base plate 5, a support assembly is provided at the upper end of the base plate 5, the support assembly includes three cylindrical wheels 1, the two cylindrical wheels 1 located on both sides are higher than the cylindrical wheel 1 located in the middle, welding assemblies are provided on both sides of the base plate 5, the welding assembly includes a welding head 3 located on one side of the upper end of the support assembly, the welding head 3 adopts a laser welding head, the welding head 3 is connected to the welding laser through a wiring harness, the welding head 3 is installed on the upper end of the base plate 5 through a support column 2, a positioning assembly is provided at the upper end of the support assembly, the positioning assembly includes a plurality of first cylindrical bars 4, second rectangular holes 44 are respectively provided in the middle of the first cylindrical bars 4, second rectangular bars 454 are respectively slidably connected inside the second rectangular holes 44, and the upper ends of the first cylindrical bars 4 are commonly slidably connected with a first circular plate 41, and the first circular plate 41 is connected to the base plate 5 through a U-shaped support frame 47.

[0023] Specifically, when welding the valve, since the valve body is generally in the shape of a round tube, when welding the pipe head to the pipe body, it is necessary to open a round hole in the pipe body to connect the pipe head with the inside of the pipe body. Since the pipe head and the pipe body are in the shape of round tubes, the round hole opened in the pipe body is arc-shaped, and the end where the pipe head and the pipe body overlap is also arc-shaped. In the existing welding technology, the pipe head and the pipe body are generally manually aligned by workers, and continuous adjustment is required during the manual docking process to ensure that the pipe head and the pipe body completely overlap, and then welding is performed. The existing technology needs to continuously adjust the position of the pipe head and the pipe body before welding. Since the pipe head and the pipe body are both in the shape of round tubes, the contact part between the pipe head and the pipe body is an irregular arc surface, and there may be certain errors when adjusting the fit, which may cause the problem of unqualified product quality. When using the present welding equipment, the pipe body is horizontally placed on the upper ends of several cylindrical wheels 1. Since the cylindrical wheels 1 on both sides are higher than the cylindrical wheel 1 in the middle, the lower end of the pipe body can be better fitted to prevent the pipe body from rolling off, and then the pipe head is sleeved on several first cylindrical wheels. The outer side of the strip 4 makes the tube head and the tube body in a vertical state, drives several first cylindrical strips 4 to slide at the lower end of the first circular plate 41, so that the first cylindrical strip 4 is close to the inner wall of the tube head, and then drives the second rectangular strip 454 to slide in the second rectangular hole 44, and the two second rectangular strips 454 slide simultaneously, and the two groups of second rectangular strips 454 slide in opposite directions at the same time, and the two second rectangular strips 454 sliding upward are close to point B of the tube head, and the two second rectangular strips 454 sliding downward are close to point A of the tube body, automatically adjusting the tube head and the opening at the upper end of the tube body to completely overlap, and then drives the first cylindrical strip 4 to drive the tube head to move downward, so that the first cylindrical strip 4 is inserted into the circular hole provided on the top of the tube body, so that the tube head and the tube body are completely overlapped, and then drives the welding head 3 to weld the overlapping part of the tube head and the tube body, which solves the problem that when welding the valve body, the tube head and the tube body need to be manually aligned, and the naked eye needs to be observed whether they are completely overlapped before welding, which may have a certain error problem, thereby improving the product quality qualification rate.

[0024] like Figure 1 , Figure 4As shown, the first cylindrical strip 4 is respectively located at the four corners of the edge of the first circular plate 41 , the upper end of the first circular plate 41 is fixedly connected to the second circular plate 42 , the upper end of the second circular plate 42 is fixedly connected to the output end of the hydraulic rod 46 , and the hydraulic rod 46 is fixedly connected to the middle of the U-shaped support frame 47 .

[0025] Specifically, after the pipe head is sleeved on the outside of the first cylindrical bar 4, the first cylindrical bar 4 is driven to be close to the inner wall of the pipe head. After the position of the pipe head and the pipe body is adjusted, the hydraulic rod 46 is driven to extend, and the pipe head on the outside of the first cylindrical bar 4 is driven to move closer to the pipe body through the second circular plate 42, so that the pipe head and the pipe body overlap, and then welding is performed.

[0026] like Figure 4 As shown, the lower end of the second circular plate 42 is slidably connected to the third ring 43, the lower ends of both sides of the third ring 43 are respectively fixedly connected to the second electric telescopic rod 431, the output ends of the second electric telescopic rod 431 are respectively fixedly connected to the third slide rails 432, the lower ends of the third slide rails 432 are respectively slidably connected to the third slider 433, and the opposite sides of the third slider 433 are respectively fixedly connected to the clamping plate 434.

[0027] Specifically, after the tube head is sleeved on the outside of the first cylindrical bar 4, the third slider 433 is driven to drive the clamping plate 434 to slide on the lower side of the third slide rail 432, so that the clamping plate 434 is close to both sides of the tube head, and the second rectangular bar 454 is driven to move upward, and the third ring 43 is driven to rotate at the lower end of the second circular plate 42, and the tube head is driven to rotate through the clamping plate 434, so that the second rectangular bar 454 can be located at point B of the tube head. After adjusting the position of the tube head, the first cylindrical bar 4 is driven to drive the tube head to move downward, so that the first cylindrical bar 4 is inserted into the circular hole provided in the tube body, and then the second electric telescopic rod 431 is driven to extend through the clamping plate 434 to drive the tube head to move downward and close to the tube body, and then welding is performed.

[0028] like Figure 5 As shown, the middle of the first cylindrical bar 4 is respectively provided with a second rectangular hole 44, the middle of the lower end of the first circular plate 41 is fixedly connected with a second cylindrical bar 45, the second cylindrical bar 45 is located in the middle of a number of first cylindrical bars 4, and two groups of rotating components are slidably arranged on the outer side of the second cylindrical bar 45, and the rotating components include a fourth ring 451 slidably arranged on the outer side of the second cylindrical bar 45, and a fifth ring 452 is rotatably connected to the outer side of the fourth ring 451, and connecting rods 453 are rotatably connected on both sides of the fifth ring 452, and the ends of the connecting rods 453 are rotatably connected to the second rectangular bar 454 respectively.

[0029] Specifically, by driving the two fourth circular rings 451 to slide in opposite directions on the outside of the second cylindrical bar 45, and then driving the fifth circular ring 452 to rotate on the outside of the fourth circular ring 451, the second rectangular bar 454 is driven to slide outward in the second rectangular hole 44 through the connecting rod 453, so that the second rectangular bar 454 at the upper end can be located at point B of the tube head, and the second rectangular bar 454 at the lower end can be located at point A of the tube body, and the positions of the tube head and the tube body can be adjusted at the same time.

[0030] like Figure 2 As shown, the support assembly also includes a first rectangular block 14 that is rotatably connected at both ends of the cylindrical wheel 1 located in the middle, a U-shaped bar 12 is fixedly connected to the lower end of the first rectangular block 14, the U-shaped bar 12 is fixedly connected to the bottom plate 5, and first rectangular holes 121 are respectively provided on both sides of the upper end of the U-shaped bar 12, and the first rectangular bars 11 are rotatably connected at both ends of the cylindrical wheels 1 located on both sides, and the first rectangular bars 11 can slide in the first rectangular holes 121 respectively, and a bidirectional screw rod 123 is commonly threadedly connected to the middle part of the first rectangular bar 11, and a motor 124 is fixedly connected to one end of the bidirectional screw rod 123, and the motor 124 is fixedly connected to the U-shaped bar 12 through a motor seat.

[0031] Specifically, the bidirectional screw rod 123 is driven to rotate by starting the motor 124, and the bidirectional screw rod 123 drives the cylindrical wheels 1 on both sides to move simultaneously through the first rectangular bar 11, so that the distance between the cylindrical wheels 1 on both sides can be adjusted, and can be used to place pipes of different diameters.

[0032] like Figure 7 As shown, an extrusion assembly is provided on one side of the U-shaped bar 12, and the extrusion assembly includes a first electric telescopic rod 13 fixedly connected to the upper end of the base plate 5, a first cylindrical rod 131 is fixedly connected to one side of the output end of the first electric telescopic rod 13, and the opposite sides of the two first cylindrical rods 131 are slidably connected to the second cylindrical rods 132.

[0033] Specifically, after the tube body is placed on the upper end of the cylindrical wheel 1, a group of second rectangular bars 454 located at the lower end is driven to move downward. By simultaneously driving the second cylindrical rod 132 to slide on the outside of the first cylindrical rod 131 toward the side away from the first electric telescopic rod 13, the second cylindrical rod 132 is located inside the two ends of the tube body. Then, the first electric telescopic rod 13 is driven to contract and the second cylindrical rod 132 is driven to move downward through the first cylindrical rod 131, so that the second cylindrical rod 132 is close to the two ends of the inner wall of the tube body and the tube body can be fixed. At the same time, the first cylindrical rod 131 is driven to drive the second cylindrical rod 132 to rotate on the side of the first electric telescopic rod 13, so that a group of second rectangular bars 454 located at the lower end can be located at point A of the tube body, thereby completing the adjustment of the tube body.

[0034] like Figure 7As shown, a first ring 1321 is fixedly connected to one end of the outer side of the second cylindrical rod 132 , and the first ring 1321 is fixedly connected to a second ring 1323 via a first spring 1322 . The second ring 1323 can slide on the outer side of the second cylindrical rod 132 .

[0035] Specifically, when the ends of the second cylindrical rod 132 are close to the two ends of the tube body, the two second cylindrical rods 132 are then driven to slide toward the middle at the same time on the outside of the first cylindrical rod 131 until the second ring 1323 contacts the edges of the two ends of the tube body and squeezes the first spring 1322, so that the tube body can be moved to the center position and the tube body can be fixed more firmly to prevent shaking during welding.

[0036] Embodiment 2: Figure 3 , Figure 6 As shown, compared with Example 1, another embodiment of the present invention is: the lower end of the support column 2 is respectively fixedly connected with a first slide 21, the lower end of the first slide 21 is respectively slidably connected with a first slide rail 211, the first slide rail 211 is fixed to the bottom plate 5, the upper end of the support column 2 is respectively fixedly connected with a second slide rail 22, one side of the second slide rail 22 is respectively slidably connected with a second slide 221, one side of the second slide 221 is respectively rotatably connected with a mounting frame 222, one side of the mounting frame 222 is respectively installed with an arcuate slide rail 224, and a welding head 3 is slidably arranged in the arcuate slide rail 224.

[0037] Specifically, since both the pipe head and the pipe body are in the shape of circular tubes, the welding path is arc-shaped during welding. The first slide 21 is driven simultaneously to drive the support column 2 to slide on the upper end of the first slide rail 211, and then the second slide 221 is driven to slide on one side of the second slide rail 22, driving the welding heads 3 on both sides to approach the pipe head at the same time, and then the mounting frame 222 and one side of the second slide 221 are driven to rotate, and the angles of the two welding heads 3 are adjusted at the same time, and then the welding head 3 is driven to slide in the arc-shaped slide rail 224, so that the pipe head and the pipe body can be automatically welded.

[0038] like Figure 6 As shown, mounting blocks 223 are respectively mounted on the upper ends of the mounting frames 222 by means of bolts, and one side of the mounting blocks 223 is respectively fixedly connected to the arc-shaped slide rails 224 .

[0039] Specifically, when it is necessary to weld valve bodies of different sizes, the diameters of the pipe head and the pipe body to be welded are different. By removing the bolts and replacing the arc-shaped slide rail 224 with the same arc as the pipe body, the welding head 3 can move according to different arcs, and pipe heads and pipe bodies of different sizes can be welded.

[0040] like Figure 6 As shown, cylinders 32 are slidably connected in the arc-shaped slide rails 224 , and the cylinders 32 are fixedly connected to the welding heads 3 via the second springs 31 . The welding heads 3 can slide in the cylinders 32 .

[0041] Specifically, since the welding surface is arc-shaped during welding, the welding head 3 is driven to slide in the cylinder 32 during welding, so that the output end of the welding head 3 and the welding seam between the pipe head and the pipe body are always at the same distance, thereby ensuring the welding effect.

[0042] Working principle: by starting the motor 124 to drive the bidirectional screw rod 123 to rotate, the bidirectional screw rod 123 drives the cylindrical wheels 1 on both sides to move simultaneously through the first rectangular bar 11, and the distance between the cylindrical wheels 1 on both sides can be adjusted, which can be used to place tubes of different diameters. After the tube is placed on the upper end of the cylindrical wheel 1, the tube head is then sleeved on the outside of a plurality of first cylindrical bars 4, and then the third slider 433 is driven to drive the clamping plate 434 to slide on the lower side of the third slide rail 432, so that the clamping plate 434 is close to both sides of the tube head, and when the second cylindrical rod 132 is driven to slide on the outside of the first cylindrical rod 131 to the side away from the first electric telescopic rod 13, the second cylindrical rod 132 is located inside the two ends of the tube body, and then the first electric telescopic rod 13 is driven to retract and drive the second cylindrical rod 132 to move downward through the first cylindrical rod 131, so that the second cylindrical rod 1 32 is close to the two ends of the inner wall of the tube body. When the ends of the second cylindrical rod 132 are close to the two ends of the inner part of the tube body, the two second cylindrical rods 132 are then driven to slide toward the middle at the same time on the outside of the first cylindrical rod 131 until the second ring 1323 contacts the edges of the two ends of the tube body and squeezes the first spring 1322 at the same time, so that the tube body can be moved to the center position. Then, the two fourth rings 451 are driven to slide in opposite directions on the outside of the second cylindrical strip 45, and then the fifth ring 452 is driven to rotate on the outside of the fourth ring 451. The second rectangular strip 454 is driven to slide outward in the second rectangular hole 44 through the connecting rod 453, so that the second rectangular strip 454 at the upper end can be located at point B of the tube head, and the second rectangular strip 454 at the lower end can be located at point A of the tube body, so that the positions of the tube head and the tube body can be adjusted at the same time. The hydraulic rod 46 is driven to extend, and the pipe head outside the first cylindrical bar 4 is driven to move toward the side close to the pipe body through the second circular plate 42, so that the first cylindrical bar 4 is inserted into the circular hole provided in the pipe body, and then the second electric telescopic rod 431 is driven to extend and the pipe head is driven to move downward through the clamping plate 434 to be close to the pipe body, and then welding is performed; Since both the pipe head and the pipe body are in the shape of round tubes, the welding path is arc-shaped during welding. The first slide 21 is driven simultaneously to drive the support column 2 to slide on the upper end of the first slide rail 211, and then the second slide 221 is driven to slide on one side of the second slide rail 22, driving the welding heads 3 on both sides to approach the pipe head at the same time, and then the mounting frame 222 and one side of the second slide 221 are driven to rotate, and the angles of the two welding heads 3 are adjusted at the same time, and then the welding head 3 is driven to slide in the arc-shaped slide rail 224, so that the pipe head and the pipe body can be automatically welded. When valve bodies of different sizes need to be welded, the diameters of the pipe head and the pipe body to be welded are different. By removing the bolts and replacing the arc-shaped slide rail 224 with the same arc as the pipe body, the welding head 3 can move according to different arcs, so that pipe heads and pipe bodies of different sizes can be welded.

[0043] 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 valve welding device, comprising a base plate (5), characterized in that: A support assembly is provided at the upper end of the base plate (5), the support assembly comprising three cylindrical wheels (1), the two cylindrical wheels (1) located on the two sides being higher than the cylindrical wheel (1) located in the middle, welding assemblies are provided at the two sides of the base plate (5), the welding assembly comprising a welding head (3) located at one side of the upper end of the support assembly, the welding head (3) being a laser welding head, the welding head (3) being connected to a welding laser via a wiring harness, the welding head (3) being mounted on the upper end of the base plate (5) via a support column (2), a positioning assembly is provided at the upper end of the support assembly, the positioning assembly comprising a plurality of first cylindrical bars (4), the middle portions of the first cylindrical bars (4) being respectively provided with second rectangular holes (44), the interiors of the second rectangular holes (44) being slidably connected to second rectangular bars (454), the upper ends of the first cylindrical bars (4) being slidably connected to a first circular plate (41), the first circular plate (41) being connected to the base plate (5) via a U-shaped support frame (47).

2. A valve welding device according to claim 1, characterized in that: The first cylindrical strips (4) are respectively located at the four corners of the edge of the first circular plate (41); the upper end of the first circular plate (41) is fixedly connected to the second circular plate (42); the upper end of the second circular plate (42) is fixedly connected to the output end of the hydraulic rod (46); and the hydraulic rod (46) is fixedly connected to the middle of the U-shaped support frame (47).

3. A valve welding device according to claim 2, characterized in that: The lower end of the second circular plate (42) is slidably connected to a third circular ring (43), the lower ends of both sides of the third circular ring (43) are respectively fixedly connected to second electric telescopic rods (431), the output ends of the second electric telescopic rods (431) are respectively fixedly connected to third slide rails (432), the lower ends of the third slide rails (432) are respectively slidably connected to third sliders (433), and the opposite sides of the third sliders (433) are respectively fixedly connected to clamping plates (434).

4. A valve welding device according to claim 3, characterized in that: A second rectangular hole (44) is respectively provided in the middle of each of the first cylindrical bars (4); a second cylindrical bar (45) is fixedly connected to the middle of the lower end of the first circular plate (41); the second cylindrical bar (45) is located in the middle of a plurality of first cylindrical bars (4); two groups of rotating components are slidably arranged on the outer side of the second cylindrical bar (45); the rotating components include a fourth circular ring (451) slidably arranged on the outer side of the second cylindrical bar (45); a fifth circular ring (452) is rotatably connected to the outer side of the fourth circular ring (451); connecting rods (453) are rotatably connected to both sides of the fifth circular ring (452); and ends of the connecting rods (453) are rotatably connected to the second rectangular bars (454).

5. The valve welding equipment according to claim 1, characterized in that: The support assembly further comprises a first rectangular block (14) rotatably connected to the two ends of the cylindrical wheel (1) located in the middle, the lower ends of the first rectangular block (14) are respectively fixedly connected to a U-shaped bar (12), the U-shaped bar (12) is fixedly connected to the bottom plate (5), the upper ends of the U-shaped bar (12) are respectively provided with first rectangular holes (121), the two ends of the cylindrical wheel (1) located on both sides are respectively rotatably connected to the first rectangular bar (11), the first rectangular bar (11) can slide in the first rectangular holes (121), the middle part of the first rectangular bar (11) is commonly threadedly connected to a bidirectional screw rod (123), one end of the bidirectional screw rod (123) is fixedly connected to a motor (124), and the motor (124) is fixedly connected to the U-shaped bar (12) via a motor seat.

6. A valve welding device according to claim 5, characterized in that: An extrusion assembly is provided on one side of the U-shaped bar (12), the extrusion assembly comprising a first electric telescopic rod (13) fixedly connected to the upper end of the bottom plate (5), a first cylindrical rod (131) fixedly connected to one side of the output end of the first electric telescopic rod (13), and second cylindrical rods (132) slidably connected to opposite sides of two first cylindrical rods (131).

7. A valve welding device according to claim 6, characterized in that: A first circular ring (1321) is fixedly connected to one end of the outer side of the second cylindrical rod (132), the first circular ring (1321) is fixedly connected to a second circular ring (1323) via a first spring (1322), and the second circular ring (1323) is able to slide on the outer side of the second cylindrical rod (132).

8. The valve welding equipment according to claim 1, characterized in that: The lower ends of the support columns (2) are respectively fixedly connected to first slides (21), the lower ends of the first slides (21) are respectively slidably connected to first slide rails (211), the first slide rails (211) are respectively fixedly connected to the bottom plate (5), the upper ends of the support columns (2) are respectively fixedly connected to second slide rails (22), one side of the second slide rails (22) is respectively slidably connected to a second slide (221), one side of the second slide (221) is respectively rotatably connected to a mounting frame (222), one side of the mounting frame (222) is respectively installed with an arcuate slide rail (224), and a welding head (3) is slidably arranged inside the arcuate slide rail (224).

9. A valve welding device according to claim 8, characterized in that: The upper ends of the mounting frames (222) are respectively mounted with mounting blocks (223) via bolts, and one side of the mounting blocks (223) is respectively fixedly connected to arc-shaped slide rails (224).

10. A valve welding device according to claim 9, characterized in that: Cylinders (32) are slidably connected in the arc-shaped slide rails (224), and the cylinders (32) are fixedly connected to welding heads (3) via second springs (31). The welding heads (3) are able to slide in the cylinders (32).

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