Valve shell assembling and welding device

Abstract

The invention relates to the technical field of valve shell assembling and welding, in particular to a valve shell assembling and welding device which comprises a base and further comprises a moving mechanism, a positioning mechanism, a welding mechanism and two side plates. The positioning mechanism comprises two moving rings, two adjusting assemblies, two clamping assemblies, a plurality of sliding grooves, a plurality of sliding blocks, a plurality of abutting rods and a plurality of L-shaped positioning blocks. The welding mechanism comprises a driving assembly, two welding heads and two rotating assemblies. Two pipe openings of a valve can be positioned through the multiple abutting blocks on the two sides, a flange plate can be positioned through the multiple L-shaped positioning blocks on the two sides, and meanwhile due to the fact that the abutting blocks and the L-shaped positioning blocks on the same side are concentric, the positioned pipe openings of the valve and the flange plate can be concentric; it can be effectively guaranteed that the flange plate is accurately aligned with the pipe opening, the welding effect and firmness are guaranteed, and the phenomenon of virtual connection and virtual welding is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of valve shell assembly welding, in particular to a valve shell assembly welding device. Background Art

[0002] Valves are control components in fluid delivery systems and have functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. When processing valves, it is generally necessary to weld and assemble flanges at the two pipe openings of the valve to facilitate subsequent installation of the valve on the pipeline.

[0003] When assembling and welding the valve and flange, the end face of the flange needs to be aligned with the end face of the valve pipe mouth, and then the gap between the flange and the pipe mouth is welded using a welding head. The existing valve housing assembly welding device has the following shortcomings: 1. The existing welding device cannot ensure that the flange and the valve nozzle are concentric. If the flange and the valve nozzle are concentric or not, the flange and the nozzle will be offset, resulting in loose welding and virtual connection, which will cause poor sealing effect between the valve nozzle and the flange. 2. When assembling the flange and the valve, only one flange can be assembled and welded at a time, and the flanges on both sides cannot be welded synchronously at the same time, resulting in a long time required for the assembly and welding of the valve housing and low welding efficiency.

[0004] In view of the above problems, a valve housing assembly welding device is now provided. Summary of the invention

[0005] The object of the present invention is to provide a valve housing assembly welding device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A valve housing assembly welding device comprises a base, a moving mechanism, a positioning mechanism, a welding mechanism and two side plates; The moving mechanism includes a pushing assembly, two slide rails and two telescopic assemblies. The two slide rails are symmetrically fixed to the top of the base. Each side plate is slidably arranged on the two slide rails. Each telescopic assembly is arranged between one side of the two side plates. The pushing assembly is installed between the base and one of the side plates. The positioning mechanism includes two moving rings, two adjusting components, two clamping components, multiple slide grooves, multiple sliders, multiple clamping rods and multiple L-shaped positioning blocks. The multiple slide grooves are all opened on the two side plates. Each slider is slidably arranged inside a slide groove. Each clamping rod is fixedly installed at one end of a slider. Each clamping block is fixedly installed on the end surface of a clamping rod away from the slider. Each moving ring is slidably arranged on multiple clamping rods located on the same side. Multiple L-shaped positioning blocks are respectively fixed on the two moving rings. Each adjusting component is located between the side plate and a moving ring. Each clamping component is located between the side plate and multiple sliders on the same side. The welding mechanism includes a driving assembly, two welding heads and two rotating assemblies. Each rotating assembly is located on a side of a side plate away from the clamping assembly. Each welding head is detachably arranged on a rotating assembly. The driving assembly is installed between the two rotating assemblies.

[0007] As a further solution of the present invention: each clamping assembly includes a turntable, a first gear ring, a first gear, a second motor, a plurality of arc grooves and a plurality of insertion rods. The turntable is rotatably arranged on one side of the side plate, and a plurality of arc grooves are equidistantly arranged on the surface of the turntable. Each insertion rod is fixedly mounted on a side of a slider away from the clamping rod, and the other end of each insertion rod is inserted into an arc groove. The first gear ring is fixedly sleeved on the outer side of the turntable, the first gear is located below the first gear ring and rotatably arranged on the surface of the side plate, the second motor is mounted on the side plate, and the output end of the second motor is fixedly connected to the first gear.

[0008] As a further solution of the present invention: each adjusting component includes a connecting plate, a threaded sleeve, a threaded rod and a first motor, the connecting plate is fixedly mounted on the surface of the movable ring, the threaded sleeve is fixedly mounted on the connecting plate, one end of the threaded rod is rotatably mounted on the side plate, the other end of the threaded rod extends into the interior of the threaded sleeve and is threadably matched with the threaded sleeve, the first motor is fixedly mounted on a side of the side plate away from the threaded rod, and the output end of the first motor is fixedly connected to the end of the threaded rod.

[0009] As a further solution of the present invention: two strip grooves are provided on the surface of each abutting rod, a moving block is slidably arranged inside each strip groove, and each moving block is fixed on the inner wall of the moving ring.

[0010] As a further solution of the present invention: the driving assembly includes a U-shaped frame, a dual-axis motor, two rotating rods, two rotating sleeves, multiple limit grooves and multiple limit blocks, the U-shaped frame is located between the two side plates, the U-shaped frame is fixedly installed on the top of the base, the dual-axis motor is installed on the top of the U-shaped frame, the two rotating sleeves are respectively fixed on the two output ends of the dual-axis motor, one end of each rotating rod is rotatably set on one side of the side plate, the other end of each rotating rod is inserted into the inside of a rotating sleeve, multiple limit grooves are opened on the inner walls of the two rotating sleeves, and a limit block is slidably connected to the inside of each limit groove, and each limit block is fixed to the surface of a corresponding rotating rod.

[0011] As a further solution of the present invention: each rotating component includes a swivel, a second gear ring and a second gear. The swivel is rotatably arranged on one side of the side plate, the second gear ring is fixedly sleeved on the outer wall of the swivel, the second gear is fixedly installed on one end of the rotating rod, the second gear and the second gear ring are meshed with each other, and the welding head is detachably installed on the surface of the swivel.

[0012] As a further solution of the present invention: an annular groove is provided on one side of the side plate close to the rotating ring, and the rotating ring is rotatably arranged inside the annular groove through a bearing.

[0013] As a further solution of the present invention: the pushing assembly includes a connecting block and an electric push rod, the connecting block is fixedly installed on the top of one of the side panels and is located between the two slide rails, the electric push rod is fixedly installed on the top of the base and is located between the two slide rails, and the output end of the electric push rod is fixedly connected to the connecting block.

[0014] As a further solution of the present invention: each telescopic assembly includes a vertical plate, a rocker rod and two hinged rods. The vertical plate is fixedly installed on the top of the base, the middle part of the rocker rod is rotatably set on the vertical plate, the two ends of the rocker rod are respectively hinged to one end of the two hinged rods, and the other end of each hinged rod is hinged to the surface of a side panel.

[0015] As a further solution of the present invention: the mounting frame is detachably mounted on the swivel, and the welding head is detachably mounted on the mounting frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. A valve housing assembly welding device of the present invention can realize the positioning of the two pipe openings of the valve by using multiple tightening blocks on both sides, and can realize the positioning of the flange by using multiple L-shaped positioning blocks on both sides. At the same time, since the multiple tightening blocks and multiple L-shaped positioning blocks on the same side are concentric, the positioned valve pipe opening and flange can be concentric, which can effectively ensure the precise alignment of the flange and the pipe opening, ensure the welding effect and firmness, and avoid the phenomenon of false joints and false welding.

[0017] 2. A valve housing assembly welding device of the present invention can adjust the position of the flange after the flange and the valve are positioned by setting an adjustment component, so that the flange can be pushed to one side of the valve pipe mouth and contact the pipe mouth, thereby facilitating the subsequent welding of the connection between the pipe mouth and the flange.

[0018] 3. A valve housing assembly welding device of the present invention can adjust the positions of the side panels on both sides by setting a telescopic component. Initially, the two side panels are far away from each other to facilitate the placement of the valve. When the two side panels are close to each other, multiple tightening blocks on both sides can be inserted into the interior of the pipe mouth, thereby realizing rapid positioning of the valve.

[0019] 4. A valve housing assembly welding device of the present invention adjusts the positions of multiple clamping rods on the same side by setting a clamping component, so that the multiple clamping rods on the same side can move synchronously, thereby driving the clamping blocks and L-shaped positioning blocks on the clamping rods to move synchronously, thereby facilitating the positioning of pipe openings and flanges with different inner diameters. It has a wide range of applications and can meet the welding requirements of valves of different sizes.

[0020] 5. A valve housing assembly welding device of the present invention, by setting a rotating component and a driving component, can drive the rotating component to work by utilizing the driving component, thereby driving the welding head to move in a circle along the gap between the flange and the pipe mouth, and can realize uninterrupted welding at the gap.

[0021] 6. A valve housing assembly welding device of the present invention can realize synchronous assembly welding of the pipe openings on both sides by arranging tightening blocks, L-shaped positioning blocks, welding heads, etc. on both sides, which can effectively reduce the time required for valve housing assembly welding and is beneficial to improving welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention.

[0023] Figure 2 For the present invention Figure 1 Schematic diagram of the enlarged structure of part A.

[0024] Figure 3 It is a front view of the present invention.

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the pipe mouth and the flange in the present invention.

[0026] Figure 5 It is a structural schematic diagram of the side panel of the present invention.

[0027] Figure 6 For the present invention Figure 5 Schematic diagram of the enlarged structure of part B.

[0028] Figure 7 It is a schematic structural diagram of the clamping rod and the L-shaped positioning block in the present invention.

[0029] Figure 8 It is a structural schematic diagram of the telescopic component in the present invention.

[0030] Fig. 9 It is a structural schematic diagram of the driving component in the present invention.

[0031] Fig.10 For the present invention Fig. 9 Schematic diagram of the enlarged structure of part C.

[0032] 1. The base is provided with a plurality of connecting rods, each of which is provided with a plurality of connecting rods, and each of which is provided with a plurality of connecting rods. The connecting rods are provided with a plurality of connecting rods, each of which is provided with a plurality of connecting rods. The connecting rods are provided with a plurality of connecting rods, each of which is provided with a plurality of connecting rods. DETAILED DESCRIPTION

[0033] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0034] The present invention provides the following preferred embodiments: Embodiment 1: Figure 1-Figure 10 As shown, a valve housing assembly welding device includes a base 11, a moving mechanism, a positioning mechanism, a welding mechanism and two side plates 13; The moving mechanism includes a pushing assembly, two slide rails 12 and two telescopic assemblies. The two slide rails 12 are symmetrically fixed to the top of the base 11. Each side plate 13 is slidably arranged on the two slide rails 12. Each telescopic assembly is arranged between one side of the two side plates 13. The pushing assembly is installed between the base 11 and one of the side plates 13. The push assembly can be used to drive one of the side plates 13 to move. Under the action of the two telescopic assemblies, the two side plates 13 can move synchronously, and the two side plates 13 are synchronously moved closer and farther away. When the two side plates 13 are away from each other, it is convenient to place the valve between the two side plates 13. When the two side plates 13 are close to each other, it is convenient to position the valve. The positioning mechanism includes two moving rings 25, two adjusting components, two clamping components, a plurality of slide grooves 19, a plurality of sliders 20, a plurality of abutting rods 21 and a plurality of L-shaped positioning blocks 26. The plurality of slide grooves 19 are all provided on the two side plates 13. Each slider 20 is slidably arranged inside a slide groove 19. Each abutting rod 21 is fixedly mounted on one end of a slider 20. Each abutting block 22 is fixedly mounted on one end surface of abutting rod 21 away from the slider 20. Each moving ring 25 is slidably arranged on a plurality of abutting rods 21 on the same side. A plurality of L-shaped positioning blocks 26 are respectively fixed on the two moving rings 25. Each adjusting component is located between the side plate 13 and a moving ring 25. Each clamping component is located between the side plate 13 and a plurality of sliders 20 on the same side. The clamping assembly can be used to drive the slider 20 on the same side to slide synchronously inside the slide groove 19, so that the multiple clamping rods 21 on the same side can slide synchronously. When the clamping rod 21 and the clamping block 22 on the clamping rod 21 extend into the valve pipe mouth, the pipe mouth can be positioned by the multiple clamping blocks 22 on the same side, and the flange can be positioned by the multiple L-shaped positioning blocks 26 on the same side. Therefore, the positioned valve pipe mouth and flange can be concentric, which can effectively ensure the precise alignment of the flange and the pipe mouth, ensure the welding effect and firmness, and avoid the phenomenon of virtual joints and virtual welding; The welding mechanism includes a driving assembly, two welding heads 48 and two rotating assemblies, each rotating assembly is located on a side of a side plate 13 away from the clamping assembly, each welding head 48 is detachably arranged on a rotating assembly, and the driving assembly is installed between the two rotating assemblies; The driving assembly can drive the rotating assemblies on both sides to work, thereby driving the welding heads 48 on the two rotating assemblies to rotate. The two welding heads 48 can be used to synchronously weld the two sides of the valve, which can effectively reduce the time required for the assembly welding of the valve housing and is conducive to improving the welding efficiency. At the same time, the rotating assembly can drive the welding head 48 to move in a circular manner, so as to achieve uninterrupted welding at the gap.

[0035] like Figure 1-Figure 10 As shown, each clamping assembly includes a rotating disk 31, a first gear ring 34, a first gear 35, a second motor 36, a plurality of arc grooves 32 and a plurality of plug rods 33. The rotating disk 31 is rotatably arranged on one side of the side plate 13. The plurality of arc grooves 32 are equidistantly arranged on the surface of the rotating disk 31. Each plug rod 33 is fixedly mounted on a side of a slider 20 away from the abutting rod 21. The other end of each plug rod 33 is plugged into an inner part of an arc groove 32. The first gear ring 34 is fixedly sleeved on the outer side of the rotating disk 31. The first gear 35 is located below the first gear ring 34 and is rotatably arranged on the surface of the side plate 13. The second motor 36 is mounted on the side plate 13. The output end of the second motor 36 is fixedly connected to the first gear 35. When it is necessary to position the flange and the pipe orifice, the flange is first sleeved on the multiple L-shaped positioning blocks 26 on the same side, and then the side plate 13 is moved to move the multiple clamping blocks 22 on the same side into the interior of a pipe orifice, and the second motor 36 is controlled to work. The second motor 36 can drive the first gear 35 to rotate. Since the first gear 35 and the first gear ring 34 are meshed with each other, when the first gear 35 rotates, the first gear ring 34 can be driven to rotate, so that the turntable 31 can rotate. When the turntable 31 rotates, it drives the arc groove 32 to rotate. Under the action of the insertion rod 33, the slider 20 can be driven to slide inside the slide groove 19, thereby driving the clamping rod 21, the clamping block 22 and the L-shaped positioning block 26 to move, so as to achieve the clamping of the pipe orifice and the flange. At the same time, it is also convenient for positioning pipe openings and flanges with different inner diameters. It has a wide range of applications and can meet the welding requirements of valves of different sizes.

[0036] like Figure 1-Figure 10 As shown, each adjustment assembly includes a connecting plate 27, a threaded sleeve 28, a threaded rod 29 and a first motor 30. The connecting plate 27 is fixedly mounted on the surface of the moving ring 25, the threaded sleeve 28 is fixedly mounted on the connecting plate 27, one end of the threaded rod 29 is rotatably mounted on the side plate 13, the other end of the threaded rod 29 extends into the interior of the threaded sleeve 28 and is threadedly matched with the threaded sleeve 28, the first motor 30 is fixedly mounted on a side of the side plate 13 away from the threaded rod 29, and the output end of the first motor 30 is fixedly connected to the end of the threaded rod 29; After the flange and the valve pipe mouth are positioned, the first motor 30 is controlled to work, and the first motor 30 can drive the threaded rod 29 to rotate. Since the threaded rod 29 and the threaded sleeve 28 are threadedly matched, and the movable ring 25 slides on the multiple clamping rods 21, when the threaded rod 29 rotates, it can drive the threaded sleeve 28 to move, so that the movable ring 25 can slide on the multiple clamping rods 21, thereby driving the L-shaped positioning block 26 and the flange positioned on the L-shaped positioning block 26 to move, so that the flange can be pushed to one side of the valve pipe mouth and contact the pipe mouth, so as to facilitate the subsequent welding of the connection between the pipe mouth and the flange.

[0037] like Figure 1-Figure 10 As shown, two strip grooves 23 are provided on the surface of each clamping rod 21, and a moving block 24 is slidably arranged inside each strip groove 23. Each moving block 24 is fixed to the inner wall of the moving ring 25. The sliding connection between the strip groove 23 and the moving block 24 can provide a guiding effect for the movement of the moving ring 25, thereby ensuring the stability of the moving ring 25 when moving.

[0038] like Figure 1-Figure 10As shown, the driving assembly includes a U-shaped frame 45, a double-axis motor 46, two rotating rods 41, two rotating sleeves 42, a plurality of limiting grooves 43 and a plurality of limiting blocks 44. The U-shaped frame 45 is located between the two side plates 13, the U-shaped frame 45 is fixedly mounted on the top of the base 11, the double-axis motor 46 is mounted on the top of the U-shaped frame 45, the two rotating sleeves 42 are respectively fixed on the two output ends of the double-axis motor 46, one end of each rotating rod 41 is rotatably arranged on one side of the side plate 13, the other end of each rotating rod 41 is plugged into the inside of a rotating sleeve 42, a plurality of limiting grooves 43 are opened on the inner walls of the two rotating sleeves 42, the inside of each limiting groove 43 is slidably connected with a limiting block 44, and each limiting block 44 is fixed on the surface of a corresponding rotating rod 41; When welding is required, the welding head 48 needs to be installed and fixed first, and the dual-axis motor 46 needs to be controlled to work at any time. The dual-axis motor 46 can drive the two rotating sleeves 42 to rotate. Due to the limitation of the limiting groove 43 and the limiting block 44, when the rotating sleeve 42 rotates, the rotating rods 41 on both sides can be driven to rotate; At the same time, since the limiting groove 43 and the limiting block 44 are slidably connected, when the two side panels 13 move, the rotating rod 41 can slide inside the rotating sleeve 42 without affecting the mutual approach and distance of the side panels 13 at both sides.

[0039] like Figure 1-Figure 10 As shown, each rotating assembly includes a rotating ring 37, a second gear ring 39 and a second gear 40. The rotating ring 37 is rotatably arranged on one side of the side plate 13, the second gear ring 39 is fixedly sleeved on the outer wall of the rotating ring 37, and the second gear 40 is fixedly installed at one end of the rotating rod 41. The second gear 40 and the second gear ring 39 are meshed with each other, and the welding head 48 is detachably installed on the surface of the rotating ring 37; When the rotating rod 41 rotates, it can drive the second gear 40 to rotate. Since the second gear 40 and the second gear ring 39 are meshed with each other, when the second gear 40 rotates, it can drive the second gear ring 39 to rotate, so that the rotating ring 37 can be rotated, thereby driving the welding head 48 installed on the rotating ring 37 to rotate.

[0040] like Figure 1-Figure 10 As shown, an annular groove 38 is provided on one side of the side plate 13 close to the swivel 37. The swivel 37 is rotatably arranged inside the annular groove 38 via a bearing. The annular groove 38 can guide the swivel 37 and ensure the stability of the swivel 37 during rotation.

[0041] like Figure 1-Figure 10 As shown, the pushing assembly includes a connecting block 17 and an electric push rod 18, the connecting block 17 is fixedly mounted on the top of one of the side plates 13, and the connecting block 17 is located between the two slide rails 12, the electric push rod 18 is fixedly mounted on the top of the base 11 and is located between the two slide rails 12, and the output end of the electric push rod 18 is fixedly connected to the connecting block 17; When the side plate 13 needs to be moved, the electric push rod 18 is controlled to work, and the electric push rod 18 can drive the connecting block 17 to move, so that the connecting block 17 can drive the side plate 13 connected to the connecting block 17 to slide on the two slide rails 12.

[0042] like Figure 1-Figure 10 As shown, each telescopic assembly includes a vertical plate 14, a swing rod 15 and two hinged rods 16. The vertical plate 14 is fixedly mounted on the top of the base 11. The middle of the swing rod 15 is rotatably mounted on the vertical plate 14. Both ends of the swing rod 15 are respectively hinged to one end of the two hinged rods 16. The other end of each hinged rod 16 is hinged to the surface of a side plate 13. When one side plate 13 rotates, the other side plate 13 can be driven to move in the opposite direction under the action of the swing rod 15 and the two hinge rods 16, so that the two side plates 13 can move closer to or farther from each other, making it convenient to install and disassemble the valve.

[0043] like Figure 1-Figure 10 As shown, the mounting frame 47 is detachably mounted on the swivel 37, and the welding head 48 is detachably mounted on the mounting frame 47, so that the mounting frame 47 and the welding head 48 can be disassembled conveniently, thereby facilitating the installation of the flange. Meanwhile, the welding head 48 is detachably arranged on the mounting frame 47, so that the subsequent maintenance of the welding head 48 is also convenient.

[0044] The specific working process of the present invention is as follows: First, the electric push rod 18 is controlled to work, and the electric push rod 18 can drive the connecting block 17 to move, so that the connecting block 17 can drive the side plate 13 connected to the connecting block 17 to slide on the two slide rails 12. When one side plate 13 rotates, the other side plate 13 can be driven to move in the opposite direction under the action of the swing rod 15 and the two hinge rods 16, so that the two side plates 13 can move away from each other. At this time, the two flanges are set on the multiple L-shaped positioning blocks 26 on both sides, and then the valve is placed between the two side plates 13. The two side plates 13 are controlled to move away from each other in the same way, so that the multiple abutting blocks 22 on both sides can extend into the interior of the pipe orifice; Then, the second motor 36 is controlled to work, and the second motor 36 can drive the first gear 35 to rotate. Since the first gear 35 and the first gear ring 34 are meshed with each other, when the first gear 35 rotates, the first gear ring 34 can be driven to rotate, so that the turntable 31 can rotate. When the turntable 31 rotates, the arc groove 32 is driven to rotate. Under the action of the insertion rod 33, the slider 20 can be driven to slide inside the slide groove 19, so that the tightening rod 21, the tightening block 22 and the L-shaped positioning block 26 can be driven to move, so as to achieve the tightening of the pipe mouth and the flange. After the positioning of the flange and the valve pipe mouth is completed, The first motor 30 is controlled to work, and the first motor 30 can drive the threaded rod 29 to rotate. Since the threaded rod 29 and the threaded sleeve 28 are threadedly matched, and the moving ring 25 slides on the multiple abutting rods 21, when the threaded rod 29 rotates, the threaded sleeve 28 can be driven to move, so that the moving ring 25 can slide on the multiple abutting rods 21, thereby driving the L-shaped positioning block 26 and the flange positioned on the L-shaped positioning block 26 to move, so that the flange can be pushed to one side of the valve pipe mouth and contact the pipe mouth, so as to facilitate the subsequent welding of the connection between the pipe mouth and the flange; Finally, the welding head 48 is installed on the mounting frame 47, and the mounting frame 47 is installed on the swivel 37, and the dual-axis motor 46 is controlled to work. The dual-axis motor 46 can drive the two rotating sleeves 42 to rotate. Due to the limitation of the limiting groove 43 and the limiting block 44, when the rotating sleeve 42 rotates, it can drive the rotating rods 41 on both sides to rotate, and when the rotating rod 41 rotates, it can drive the second gear 40 to rotate. Since the second gear 40 and the second gear ring 39 are meshed with each other, when the second gear 40 rotates, it can drive the second gear ring 39 to rotate, so that the swivel 37 can be rotated, thereby driving the welding head 48 installed on the swivel 37 to rotate, and can drive the welding head 48 to make a circular movement along the gap between the flange and the pipe mouth, so as to achieve uninterrupted welding at the gap.

[0045] The beneficial effects of the present invention are specifically embodied in that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve housing assembly welding device, comprising a base (11), characterized in that: It also includes a moving mechanism, a positioning mechanism, a welding mechanism and two side plates (13); The moving mechanism comprises a pushing assembly, two slide rails (12) and two telescopic assemblies, the two slide rails (12) are symmetrically fixed on the top of the base (11), each side plate (13) is slidably arranged on the two slide rails (12), each telescopic assembly is arranged between one side of the two side plates (13), and the pushing assembly is installed between the base (11) and one of the side plates (13); The positioning mechanism comprises two movable rings (25), two adjustment components, two clamping components, a plurality of slide grooves (19), a plurality of sliders (20), a plurality of abutting rods (21) and a plurality of L-shaped positioning blocks (26), wherein the plurality of slide grooves (19) are all provided on the two side plates (13), each slider (20) is slidably arranged inside a slide groove (19), each abutting rod (21) is fixedly mounted on one end of a slider (20), each abutting block (22) is fixedly mounted on an end surface of abutting rod (21) away from the slider (20), each movable ring (25) is slidably arranged on a plurality of abutting rods (21) located on the same side, a plurality of L-shaped positioning blocks (26) are respectively fixed on the two movable rings (25), each adjustment component is located between the side plate (13) and a movable ring (25), and each clamping component is located between the side plate (13) and a plurality of sliders (20) on the same side; The welding mechanism comprises a driving assembly, two welding heads (48) and two rotating assemblies, each rotating assembly is located on a side of a side plate (13) away from the clamping assembly, each welding head (48) is detachably arranged on a rotating assembly, and the driving assembly is installed between the two rotating assemblies.

2. A valve housing assembly welding device according to claim 1, characterized in that: Each clamping assembly comprises a rotating disk (31), a first gear ring (34), a first gear (35), a second motor (36), a plurality of arc grooves (32) and a plurality of insertion rods (33); the rotating disk (31) is rotatably arranged on one side of the side plate (13); the plurality of arc grooves (32) are equidistantly arranged on the surface of the rotating disk (31); each insertion rod (33) is fixedly mounted on a side of a slider (20) away from the abutting rod (21); the other end of each insertion rod (33) is inserted into an arc groove (32); the first gear ring (34) is fixedly sleeved on the outer side of the rotating disk (31); the first gear (35) is located below the first gear ring (34) and is rotatably arranged on the surface of the side plate (13); the second motor (36) is mounted on the side plate (13); and the output end of the second motor (36) is fixedly connected to the first gear (35).

3. A valve housing assembly welding device according to claim 2, characterized in that: Each adjustment assembly comprises a connecting plate (27), a threaded sleeve (28), a threaded rod (29) and a first motor (30); the connecting plate (27) is fixedly mounted on the surface of the moving ring (25); the threaded sleeve (28) is fixedly mounted on the connecting plate (27); one end of the threaded rod (29) is rotatably mounted on the side plate (13); the other end of the threaded rod (29) extends into the interior of the threaded sleeve (28) and is threadably engaged with the threaded sleeve (28); the first motor (30) is fixedly mounted on a side of the side plate (13) away from the threaded rod (29); and an output end of the first motor (30) is fixedly connected to an end of the threaded rod (29).

4. A valve housing assembly welding device according to claim 3, characterized in that: Two strip grooves (23) are formed on the surface of each abutting rod (21), a moving block (24) is slidably disposed inside each strip groove (23), and each moving block (24) is fixed to the inner wall of the moving ring (25).

5. A valve housing assembly welding device according to claim 4, characterized in that: The driving assembly comprises a U-shaped frame (45), a double-axis motor (46), two rotating rods (41), two rotating sleeves (42), a plurality of limiting grooves (43) and a plurality of limiting blocks (44); the U-shaped frame (45) is located between the two side plates (13); the U-shaped frame (45) is fixedly mounted on the top of the base (11); the double-axis motor (46) is mounted on the top of the U-shaped frame (45); the two rotating sleeves (42) are respectively fixed on two output ends of the double-axis motor (46); one end of each rotating rod (41) is rotatably arranged on one side of the side plate (13); the other end of each rotating rod (41) is plugged into the interior of a rotating sleeve (42); the plurality of limiting grooves (43) are arranged on the inner walls of the two rotating sleeves (42); the interior of each limiting groove (43) is slidably connected to a limiting block (44); and each limiting block (44) is fixed on the surface of a corresponding rotating rod (41).

6. A valve housing assembly welding device according to claim 5, characterized in that: Each rotating assembly comprises a rotating ring (37), a second gear ring (39) and a second gear (40); the rotating ring (37) is rotatably arranged on one side of the side plate (13); the second gear ring (39) is fixedly sleeved on the outer wall of the rotating ring (37); the second gear (40) is fixedly mounted on one end of a rotating rod (41); the second gear (40) and the second gear ring (39) are meshed with each other; and the welding head (48) is detachably mounted on the surface of the rotating ring (37).

7. A valve housing assembly welding device according to claim 6, characterized in that: An annular groove (38) is formed on one side of the side plate (13) close to the rotating ring (37), and the rotating ring (37) is rotatably arranged inside the annular groove (38) via a bearing.

8. A valve housing assembly welding device according to claim 7, characterized in that: The pushing assembly comprises a connecting block (17) and an electric push rod (18); the connecting block (17) is fixedly mounted on the top end of one of the side plates (13), and the connecting block (17) is located between the two slide rails (12); the electric push rod (18) is fixedly mounted on the top end of the base (11) and is located between the two slide rails (12); and the output end of the electric push rod (18) is fixedly connected to the connecting block (17).

9. A valve housing assembly welding device according to claim 8, characterized in that: Each telescopic assembly comprises a vertical plate (14), a swing rod (15) and two hinged rods (16); the vertical plate (14) is fixedly mounted on the top of the base (11); the middle part of the swing rod (15) is rotatably mounted on the vertical plate (14); the two ends of the swing rod (15) are respectively hinged to one end of the two hinged rods (16); and the other end of each hinged rod (16) is hinged to the surface of a side plate (13).

10. A valve housing assembly welding device according to claim 9, characterized in that: The mounting frame (47) is detachably mounted on the rotating ring (37), and the welding head (48) is detachably mounted on the mounting frame (47).

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