Automatic welding tool for centrifugal pump accessories

Abstract

The invention is suitable for the technical field of pump shell welding, and provides an automatic welding tool for centrifugal pump accessories, which comprises an equipment bracket, a turntable, clamping arms and a welding module, the turntable is mounted on the equipment bracket, the clamping arms are uniformly and slidably connected in the turntable, the welding module is fixedly connected to the top of the equipment bracket, and the automatic welding tool further comprises a seam aligning assembly, the butt joint assembly is arranged in the rotary disc and comprises a gear shaft, a first toothed plate, a push plate, a sliding frame, a lead screw, a first gear and a rack, and the gear shaft is rotationally connected to the interior of the clamping arm; the pump shell welding device has the beneficial effects that the first toothed plates on the two sides relatively slide in the clamping arms, so that the two push plates on the clamping arms push the two pump shells correspondingly, the two pump shells continuously get close to each other to be attached to each other on the device, the attaching positions of the sections of the two pump shells are perpendicular to the lower portion of a welding module, and the welding efficiency is improved. And after the welding module is started, the fitting surfaces of the two pump shells can be directly welded.

Description

Technical Field

[0002] This invention belongs to the field of pump casing welding technology, and particularly relates to an automatic welding fixture for centrifugal pump accessories. Background Technology

[0003] Centrifugal pumps are core fluid transport equipment in industries such as petroleum, chemical, water conservancy, and power. The welding quality of key components such as the pump casing directly determines the pump's sealing performance, structural strength, and operational reliability. As industrial production demands increasingly greater adaptability to centrifugal pump operating conditions, the structural complexity of components such as the pump casing is gradually increasing, and the requirements for welding precision, efficiency, and stability are becoming increasingly stringent.

[0004] Traditional welding processes for centrifugal pump components often employ a combination of manual positioning and clamping with manual welding, or rely on simple semi-automatic welding fixtures. This approach presents several technical bottlenecks: The precision of the joints of pump casing and other accessories is difficult to control. When placing the workpiece manually, problems such as misalignment of cross sections and loose fit are easy to occur, resulting in uneven welds, porosity or incomplete penetration after welding. This not only affects the appearance quality, but may also cause leakage risks during operation. The workpiece angle adjustment is not flexible enough during the welding process. When the clamping arm blocks the weld area, the machine needs to be stopped to readjust the workpiece position. Continuous all-round welding cannot be achieved, resulting in discontinuous welding process and further reducing production efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic welding fixture for centrifugal pump accessories, which aims to solve the technical problems existing in the prior art mentioned in the background.

[0006] This invention is implemented as follows: an automatic welding fixture for centrifugal pump accessories includes an equipment support, a turntable, a clamping arm, and a welding module. The turntable is mounted on the equipment support, the clamping arm is slidably connected inside the turntable, and the welding module is fixedly connected to the top of the equipment support. The fixture also includes: A seam-aligning assembly is disposed inside the turntable. The seam-aligning assembly includes a gear shaft, a first gear plate, a push plate, a slide, a lead screw, a first gear, and a rack. The gear shaft is rotatably connected to the inside of the clamping arm. Two first gear plates slide symmetrically inside the clamping arm and mesh with the gear shaft. The push plate is rotatably connected to the end of the first gear plate away from the gear shaft. The slide is slidably connected to the side of the first gear plate near the turntable. The lead screw is slidably engaged in the middle of the slide. The first gear is fixedly connected to the end of the lead screw and meshes with a rack fixedly connected to the outer wall of the turntable. An angle adjustment component, located inside the turntable, is used to adjust the clamping position of the welded parts; The distance adjustment component, located inside the turntable, is used to drive multiple gripping arms on the turntable.

[0007] As a preferred technical solution of the present invention: a first spring is fixedly connected between the first toothed plate and the slide, a pulley plate is slidably connected inside the clamping arm, an inclined plate is slidably connected to the middle of the pulley plate, a third spring is fixedly connected between the inclined plate and the surface of the clamping arm, an L-shaped support foot is rotatably connected to the side of the clamping arm near the inclined plate, a second spring is fixedly connected between the L-shaped support foot and the clamping arm, the side of the L-shaped support foot away from the clamping arm is in contact with the outer wall of the pulley plate, and a fourth spring is fixedly connected between the push plate and the first toothed plate.

[0008] As another preferred technical solution of the present invention: the L-shaped support foot is perpendicular to the surface of the clamping arm when the second spring is not twisted, and the push plate is perpendicular to the surface of the first toothed plate when the fourth spring is not twisted. The two push plates can only rotate relatively close to each other due to the limitation of the surface of the first toothed plate.

[0009] As another preferred technical solution of the present invention: a limiting frame is fixedly connected to the top of the pulley plate, a first magnetic plate is fixedly connected to the surface of the limiting frame and inside the clamping arm, a second magnetic plate with the opposite magnetic pole to the first magnetic plate is fixedly connected to the top of the inner cavity of the clamping arm, a fifth spring is fixedly connected to the limiting frame and the bottom of the inner cavity of the clamping arm, and an infrared probe horizontal to the limiting frame is installed on the outer wall of the clamping arm.

[0010] As another preferred technical solution of the present invention: the angle adjustment component includes a first slide block that is uniformly slidably fitted inside the turntable, a telescopic rod that is fixedly connected between the first slide block and the inner wall of the turntable, a round rod that is rotatably connected to the side of the first slide block away from the turntable, a gear plate that is fixedly connected to the outer wall of the round rod, and a hollow rubber seat that is fixedly connected to the end of the round rod away from the first slide block. Air guide grooves for connecting the telescopic rod and the hollow rubber seat are opened inside the first slide block and the round rod. A second slide block is symmetrically slidably connected on the turntable, a transmission gear rod that is rotatably connected inside the second slide block, and a transmission belt that is transmissionally connected between the transmission gear rod and the gear plate.

[0011] As another preferred technical solution of the present invention: the outer wall of the transmission rack is rotatably connected to a limiting seat, the two limiting seats are symmetrically slidably connected to the inside of the turntable, a sixth spring is fixedly connected to the side of the limiting seat near the clamping arm, a fixed seat is fixedly connected to the end of the sixth spring away from the limiting seat, the fixed seat is fixedly connected to the outer wall of the clamping arm, an insert plate is fixedly connected to the side of the fixed seat near the limiting seat, baffles are uniformly fixedly connected to the side of the insert plate near the transmission rack, a second toothed plate is rotatably connected to the surface of the insert plate and above the baffle, and a seventh spring is fixedly connected between the second toothed plate and the outer wall of the insert plate.

[0012] As another preferred technical solution of the present invention: when the seventh spring is not under force, the second toothed plate is inclined at a 45-degree angle to the outer wall of the insert plate, and the second toothed plate meshes with the transmission toothed rod in one direction.

[0013] As another preferred technical solution of the present invention: the distance adjustment component includes a first arm fixedly connected to the clamping arm, a cylinder installed between the first arm and the center of the turntable is rotatably connected to a base plate, and a plurality of second arms are rotatably connected to the base plate, with the end of the second arm away from the base plate rotatably connected to the outer wall of the clamping arm.

[0014] The beneficial effects of the embodiments of the present invention are as follows: The first toothed plates on both sides slide relative to each other inside the clamping arm, thereby causing the two push plates on the clamping arm to push the two pump housings respectively, so that the two pump housings continuously approach each other on the equipment until they fit together, so that the cross-sectional contact position of the two pump housings is perpendicular to the bottom of the welding module, so that the welding module can be opened to directly weld the contact surfaces of the two pump housings.

[0015] As the clamping arm slides in the reverse direction within the turntable, the insert plate slides towards the side closer to the clamping arm inside the limiting seat. At this time, the second toothed plate meshes with the transmission rack, causing the transmission rack to rotate. During the rotation of the transmission rack, multiple round rods rotate together via the transmission belt. When the round rods rotate, the hollow rubber seat rotates together, causing the pump casing to rotate relative to the clamping arm, exposing the part of the pump casing that was covered by the clamping arm. At this time, the welding module is activated to weld the contact surface of the pump casing again, realizing the all-round welding operation of the pump casing on the equipment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure provided in an embodiment of the present invention; Figure 2 This is an exploded view of the overall structure provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the overall structure of the adjustable distance component provided in an embodiment of the present invention; Figure 4 This is an exploded view of the adjustable distance assembly structure provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the overall clamping arm structure provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the explosion of structure 5 provided in an embodiment of the present invention; Figure 7 This is a schematic cross-sectional view of the three structures provided in an embodiment of the present invention; Figure 8 This is a partial cross-sectional view of the angle adjustment component structure provided in an embodiment of the present invention; Figure 9 This is a schematic cross-sectional view of the overall structure provided in an embodiment of the present invention; Figure 10 Provided for embodiments of the present invention Figure 9 Enlarged schematic diagram of the structure at point A in the middle; Figure 11 This is a front view schematic diagram of the overall structure provided in an embodiment of the present invention; Figure 12 This is a partial schematic diagram of the angle adjustment component structure provided in an embodiment of the present invention; Figure 13 This is a partially exploded view of the angle adjustment component structure provided in an embodiment of the present invention.

[0017] In the picture: 1. Equipment support frame; 2. Turntable; 3. Clamping arm; 4. Welding module; 5. Seam assembly; 6. Angle adjustment assembly; 7. Spacing adjustment assembly; 51. Gear shaft; 52. First gear plate; 53. Push plate; 54. Slide; 55. First spring; 56. Lead screw; 57. First gear; 58. Rack; 59. Pulley plate; 510. L-shaped support foot; 511. Second spring; 512. Sloping plate; 513. Third spring; 514. Fourth spring; 591. Limiting frame; 592. First magnetic plate; 593. Second magnetic plate; 594. Fifth spring; 595. Infrared sensor; 61. First slide; 62. Telescopic rod; 63. Gear plate; 64. Round rod; 65. Hollow rubber seat; 66. Air guide groove; 67. Second slide; 68. Transmission gear; 69. Limiting seat; 610. Sixth spring; 611. Fixed seat; 612. Insert plate; 613. Second gear plate; 614. Seventh spring; 615. Baffle; 616. Transmission belt; 71. First outrigger; 72. Cylinder; 73. Base plate; 74. Second outrigger. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0019] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various elements, but unless otherwise stated, these elements are not limited by these terms. These terms are used only to distinguish one element from another.

[0020] like Figure 1 , Figures 5 to 7As shown, in one embodiment, an automatic welding fixture for centrifugal pump accessories is proposed, including an equipment support 1, a turntable 2, a clamping arm 3, and a welding module 4. The turntable 2 is mounted on the equipment support 1, the clamping arm 3 is slidably connected inside the turntable 2, and the welding module 4 is fixedly connected to the top of the equipment support 1. The fixture also includes: The seam fitting assembly 5 is disposed inside the turntable 2. The seam fitting assembly 5 includes a gear shaft 51, a first gear plate 52, a push plate 53, a slide 54, a lead screw 56, a first gear 57, and a rack 58. The gear shaft 51 is rotatably connected to the inside of the clamping arm 3. The two first gear plates 52 slide symmetrically inside the clamping arm 3 and mesh with the gear shaft 51. The push plate 53 is rotatably connected to the end of the first gear plate 52 away from the gear shaft 51. The slide 54 is slidably connected to the side of the first gear plate 52 near the turntable 2. The lead screw 56 is slidably engaged in the middle of the slide 54. The first gear 57 is fixedly connected to the end side of the lead screw 56 and meshes with the rack 58 fixedly connected to the outer wall of the turntable 2. Angle adjustment component 6 is located inside turntable 2 and is used to adjust the clamping position of the welded parts; The distance adjustment component 7 is located inside the turntable 2 and is used to drive multiple clamping arms 3 on the turntable 2.

[0021] In practical application, the operator places the two pump housings to be welded onto the clamping arms 3 one after the other. Because the pulley plates 59 slide out from the outside of the clamping arms 3, the two pump housings are in a slidable state under the limiting position of the pulley plates 59 on the multiple clamping arms 3. Then, the operator manipulates the equipment to tighten the multiple clamping arms 3 and clamp the pump housings. As the clamping arms 3 slide on the turntable 2, the first gear 57 meshes with the rack 58 and rotates. During the rotation, the first gear 57 drives the slide 54 to clamp the pump housings. The inner sliding of the arm 3 and the sliding of the carriage 54 are driven by the first spring 55 to slide together with the first toothed plate 52. When the first toothed plate 52 on one side slides, the meshing of the toothed shaft 51 causes the first toothed plates 52 on both sides to slide relative to each other inside the clamping arm 3. This causes the two push plates 53 on the clamping arm 3 to push the two pump housings respectively, so that the two pump housings continuously approach each other on the equipment until they are in contact. This makes the contact position of the cross-sections of the two pump housings perpendicular to the bottom of the welding module 4, so that the welding module 4 can be opened to directly weld the contact surfaces of the two pump housings.

[0022] like Figure 6 and Figure 7As shown, in a preferred embodiment of the present invention, a first spring 55 is fixedly connected between the first toothed plate 52 and the slide 54, a pulley plate 59 is slidably connected inside the clamping arm 3, an inclined plate 512 is slidably connected to the middle of the pulley plate 59, a third spring 513 is fixedly connected between the inclined plate 512 and the surface of the clamping arm 3, an L-shaped support foot 510 is rotatably connected to the side of the clamping arm 3 near the inclined plate 512, a second spring 511 is fixedly connected between the L-shaped support foot 510 and the clamping arm 3, the side of the L-shaped support foot 510 away from the clamping arm 3 is in contact with the outer wall of the pulley plate 59, and a fourth spring 514 is fixedly connected between the push plate 53 and the first toothed plate 52.

[0023] In practical application, as the two pump housings approach each other inside the device, the edges of the pump housings will press against the inclined panel 512, causing the inclined panel 512 to slide towards the clamping arm 3 after being pressed. During the sliding process, the top of the inclined panel 512 will press against the L-shaped support foot 510, causing the L-shaped support foot 510 to flip on the surface of the clamping arm 3. After the L-shaped support foot 510 is no longer in contact with the surface of the pulley plate 59, the L-shaped support foot 510 can no longer support between the pulley plate 59 and the clamping arm 3. Therefore, at this time, the pulley plate 59 is in a slidable state inside the clamping arm 3. After the pulley plate 59 no longer supports the pump housing, the pump housing can no longer slide laterally on the device. By switching to the clamping arm 3 to clamp the pump housing, the pump housing is clamped stably on the device.

[0024] like Figure 6 and Figure 7 As shown, in another preferred embodiment of the present invention, the L-shaped support foot 510 is perpendicular to the surface of the clamping arm 3 when the second spring 511 is not twisted, and the push plate 53 is perpendicular to the surface of the first toothed plate 52 when the fourth spring 514 is not twisted. The two push plates 53 can only rotate relatively close to each other due to the limitation of the surface of the first toothed plate 52.

[0025] like Figure 6 and Figure 7 As shown, in another preferred embodiment of the present invention, a limiting frame 591 is fixedly connected to the top of the pulley plate 59, a first magnetic plate 592 is fixedly connected to the surface of the limiting frame 591 and inside the clamping arm 3, a second magnetic plate 593 with opposite magnetic poles to the first magnetic plate 592 is fixedly connected to the top of the inner cavity of the clamping arm 3, a fifth spring 594 is fixedly connected to the bottom of the inner cavity of the limiting frame 591 and the clamping arm 3, and an infrared probe 595 horizontal to the limiting frame 591 is installed on the outer wall of the clamping arm 3.

[0026] In practical application, when the pulley plate 59 slides to its maximum distance on the turntable 2, the limiting frame 591 will abut against the inner wall of the turntable 2, causing the limiting frame 591 to slide inside the clamping arm 3. This disrupts the magnetic attraction between the second magnetic plate 593 and the first magnetic plate 592, causing the fifth spring 594, which is under tension, to elastically contract. This causes the pulley plate 59 to slide closer to the clamping surface on the clamping arm 3. After the pulley plate 59 slides, the distance between it and the clamping arm 3 increases, releasing the torque of the second spring 511 and causing the L-shaped support leg 510 to flip. When the pump housing is brought to a position perpendicular to the surface of the clamping arm 3, the L-shaped support foot 510 forms a support between the clamping arm 3 and the pulley plate 59. When the pump housing is brought closer together to a close fit, the pressure of the pump housing edge on the inclined plate 512 causes the L-shaped support foot 510 to flip, so that the L-shaped support foot 510 can no longer support between the clamping arm 3 and the pulley plate 59. At this time, the distance between the multiple clamping arms 3 is shortened, and the surface of the pump housing will press against the pulley plate 59, causing the first magnetic plate 592 and the second magnetic plate 593 to come into contact and magnetically attract each other, so that the pulley plate 59 is housed inside the clamping arm 3.

[0027] like Figures 8 to 13 As shown, in another preferred embodiment of the present invention, the angle adjustment component 6 includes a first slide block 61 that is uniformly slidably fitted inside the turntable 2. A telescopic rod 62 is fixedly connected between the first slide block 61 and the inner wall of the turntable 2. A round rod 64 is rotatably connected to the side of the first slide block 61 away from the turntable 2. A toothed disc 63 is fixedly connected to the outer wall of the round rod 64. A hollow rubber seat 65 is fixedly connected to the end of the round rod 64 away from the first slide block 61. An air guide groove 66 for connecting the telescopic rod 62 and the hollow rubber seat 65 is opened inside the first slide block 61 and the round rod 64. A second slide block 67 is symmetrically slidably connected on the turntable 2. A transmission rack 68 is rotatably connected inside the second slide block 67. A transmission belt 616 is drivingly connected between the transmission rack 68 and the toothed disc 63.

[0028] like Figures 8 to 13 As shown, in another preferred embodiment of the present invention, the outer wall of the transmission rack 68 is rotatably connected to a limiting seat 69. The two limiting seats 69 are symmetrically slidably connected inside the turntable 2. A sixth spring 610 is fixedly connected to the side of the limiting seat 69 near the clamping arm 3. A fixing seat 611 is fixedly connected to the end of the sixth spring 610 away from the limiting seat 69. The fixing seat 611 is fixedly connected to the outer wall of the clamping arm 3. An insert plate 612 is fixedly connected to the side of the fixing seat 611 near the limiting seat 69. A baffle 615 is uniformly fixedly connected to the side of the insert plate 612 near the transmission rack 68. A second toothed plate 613 is rotatably connected to the surface of the insert plate 612 and above the baffle 615. A seventh spring 614 is fixedly connected between the second toothed plate 613 and the outer wall of the insert plate 612.

[0029] In practical application, during the clamping process of the clamping arm 3 clamping the pump housing surface, the movement of the clamping arm 3 will drive the fixed seat 611, the sixth spring 610 and the limiting seat 69 to move together. During the movement of the limiting seat 69, it will drive the transmission rack 68 inside it to move together. During the process of the transmission rack 68 getting closer to each other inside the turntable 2, the transmission belt 616 will pull the first slide 61 and the round rod 64 to move inside the turntable 2, so that multiple hollow rubber seats 65 on the turntable 2 approach the pump housing surface until they fit together. During the process of the first slide 61 sliding inside the turntable 2, the telescopic rod 62 is in a state of continuous contraction. The air inside the telescopic rod 62 is injected into the hollow rubber seat 65 through the first slide 61 and the air guide groove 66. After being injected with air, the hollow rubber seat 65 expands and fits onto the pump housing surface.

[0030] When the limiting seat 69 slides to its end inside the turntable 2, the continued movement of the clamping arm 3 will cause the sixth spring 610 to elastically contract, and the insert plate 612 to slide into the limiting seat 69. At this time, because the second toothed plate 613 and the transmission rack 68 are engaged in one direction, the transmission rack 68 will not rotate after the insert plate 612 is inserted. At this time, the operator opens the equipment bracket 1, causing the turntable 2 to drive the pump casing to rotate on the equipment bracket 1. During the rotation of the pump casing, the welding module 4 will weld its joints. After the exposed part of the pump casing is welded, some parts of the pump casing surface are not yet welded due to the clamping arm 3. At this time, the clamping arm 3 slides in the opposite direction inside the turntable 2, and the insert plate 61... 2. The pump housing slides inside the limiting seat 69 towards the side closer to the clamping arm 3. At this time, the second toothed plate 613 meshes with the transmission rack 68, causing the transmission rack 68 to rotate. During the rotation of the transmission rack 68, multiple round rods 64 are driven to rotate together through the transmission belt 616. When the round rods 64 rotate, the hollow rubber seat 65 will rotate together. Since the pump housing is limited between multiple hollow rubber seats 65, the rotation of the hollow rubber seat 65 will drive the pump housing to rotate together, thereby causing the pump housing to rotate relative to the clamping arm 3, exposing the part of the pump housing that was covered by the clamping arm 3. At this time, the welding module 4 is started to weld the contact surface of the pump housing again, realizing the all-round welding operation of the pump housing on the equipment.

[0031] like Figure 12 As shown, in another preferred embodiment of the present invention, when the seventh spring 614 is not under force, the second toothed plate 613 and the outer wall of the insert plate 612 are inclined at a 45-degree angle, and the second toothed plate 613 and the transmission toothed rod 68 engage in one direction.

[0032] like Figures 1 to 4 As shown, in another preferred embodiment of the present invention, the distance adjustment component 7 includes a first arm 71 fixedly connected to the clamping arm 3, a cylinder 72 installed between the first arm 71, a base plate 73 rotatably connected to the center of the turntable 2, a plurality of second arms 74 rotatably connected to the base plate 73, and one end of the second arm 74 away from the base plate 73 rotatably connected to the outer wall of the clamping arm 3.

[0033] In practical application, when the cylinder 72 retracts, the first support arm 71 causes the two opposing clamping arms 3 to slide relatively close to each other inside the turntable 2. When the two opposing clamping arms 3 slide, the second support arm 74 drives the base plate 73 to rotate on the surface of the turntable 2. When the base plate 73 rotates, the second support arm 74 causes the other two clamping arms 3 to slide together inside the turntable 2.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0036] 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, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic welding fixture for centrifugal pump accessories, comprising a device support (1), a turntable (2), a clamping arm (3), and a welding module (4), wherein the turntable (2) is mounted on the device support (1), the clamping arm (3) is slidably connected inside the turntable (2), and the welding module (4) is fixedly connected to the top of the device support (1), characterized in that, Also include: The pair of seam components (5) are arranged inside the rotary table (2), the pair of seam components (5) include pinion shaft (51), first toothed plate (52), push plate (53), slide (54), screw rod (56), first gear (57) and rack (58), the pinion shaft (51) is rotatably connected to the inside of the clamping arm (3), two the first toothed plate (52) is symmetrically slid in the inside of the clamping arm (3) and is engaged with the pinion shaft (51), the push plate (53) is rotatably connected to the first toothed plate (52) away from the pinion shaft (51) one end, the slide (54) is slidably connected to the first toothed plate (52) close to the rotary table (2) one side, the screw rod (56) is slidably connected to the middle part of the slide (54), the first gear (57) is fixedly connected at the end side of the screw rod (56), the first gear (57) is engaged with the rack (58) fixedly connected on the outer wall of the rotary table (2); Angle adjusting assembly (6) is arranged in the rotary table (2), be used for adjusting the clamping position of the welding piece; The distance adjusting assembly (7) is arranged in the rotary table (2), is used for driving multiple clamping arms (3) on the rotary table (2).

2. The automatic welding tool for centrifugal pump fittings according to claim 1, characterized in that, The first toothed plate (52) and slide (54) are fixedly connected with first spring (55), the clamping arm (3) is slidably connected with pulley plate (59), the middle part of pulley plate (59) is slidably connected with inclined plane plate (512), the inclined plane plate (512) and the surface of clamping arm (3) are fixedly connected with third spring (513), the side of clamping arm (3) close to inclined plane plate (512) is rotatably connected with L-shaped support leg (510), the L-shaped support leg (510) and clamping arm (3) are fixedly connected with second spring (511), the side of L-shaped support leg (510) away from clamping arm (3) is attached to the outer wall of pulley plate (59), the push plate (53) and the first toothed plate (52) are fixedly connected with fourth spring (514).

3. The automatic welding tool for centrifugal pump fittings according to claim 2, characterized in that, The L-shaped support leg (510) is perpendicular to the surface of clamping arm (3) in the untwisted state of second spring (511), the push plate (53) is perpendicular to the surface of first toothed plate (52) in the untwisted state of fourth spring (514), two push plates (53) are limited by the surface of first toothed plate (52) and can only rotate relatively close.

4. The automatic welding tool for centrifugal pump fittings according to claim 2, characterized in that, The top of pulley plate (59) is fixedly connected with limit frame (591), the surface of limit frame (591) and in the inside of clamping arm (3) is fixedly connected with first magnetic plate (592), the top of the inner cavity of clamping arm (3) is fixedly connected with second magnetic plate (593) opposite to the magnetic pole of first magnetic plate (592), the limit frame (591) and the inner cavity bottom of clamping arm (3) are fixedly connected with fifth spring (594), the outer wall of clamping arm (3) is provided with infrared probe (595) horizontally arranged in limit frame (591).

5. The automatic welding tool for centrifugal pump fittings according to claim 1, characterized in that, The angle adjusting assembly (6) comprises a first sliding seat (61) uniformly slidingly fitted in the rotating disc (2), a telescopic rod (62) fixedly connected between the first sliding seat (61) and the inner wall of the rotating disc (2), a round rod (64) rotationally connected to the side of the first sliding seat (61) away from the rotating disc (2), a gear disc (63) fixedly connected to the outer wall of the round rod (64), a hollow rubber seat (65) fixedly connected to the end of the round rod (64) away from the first sliding seat (61), and a gas guide groove (66) formed in the first sliding seat (61) and the round rod (64) for connecting the telescopic rod (62) and the hollow rubber seat (65), wherein the rotating disc (2) is symmetrically slidingly connected with a second sliding seat (67), the second sliding seat (67) is rotationally connected with a transmission gear rod (68) in the inside thereof, and the transmission gear rod (68) and the gear disc (63) are transmissionally connected with a transmission belt (616).

6. The automatic welding tool for centrifugal pump fittings according to claim 5, characterized in that, The outer wall of the transmission gear rod (68) is rotationally connected with a limiting seat (69), the two limiting seats (69) are symmetrically slidingly connected in the inside of the rotating disc (2), the limiting seat (69) is fixedly connected with a sixth spring (610) on the side close to the clamping arm (3), the end of the sixth spring (610) away from the limiting seat (69) is fixedly connected with a fixed seat (611), the fixed seat (611) is fixedly connected to the outer wall of the clamping arm (3), the fixed seat (611) is fixedly connected with an insertion plate (612) on the side close to the limiting seat (69), the insertion plate (612) is uniformly fixedly connected with a baffle (615) on the side close to the transmission gear rod (68), the surface of the insertion plate (612) and the top of the baffle (615) are rotationally connected with a second toothed plate (613), and the second toothed plate (613) and the outer wall of the insertion plate (612) are fixedly connected with a seventh spring (614).

7. The automatic welding tool for centrifugal pump fittings according to claim 6, characterized in that, The second toothed plate (613) and the outer wall of the insertion plate (612) form a forty-five-degree inclination angle in the unstressed state of the seventh spring (614), and the second toothed plate (613) is unidirectionally engaged with the transmission gear rod (68).

8. The automatic welding tool for centrifugal pump fittings according to claim 1, characterized in that, The distance adjusting assembly (7) comprises a first supporting arm (71) fixedly connected to the clamping arm (3), a gas cylinder (72) mounted between the first supporting arm (71), a bottom plate (73) rotationally connected in the middle of the rotating disc (2), a plurality of second supporting arms (74) rotationally connected to the outer wall of the clamping arm (3) at the ends thereof away from the bottom plate (73).

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