Welding device and method for hollow cast iron pipe machining

Abstract

The invention discloses a welding device and method for hollow cast iron pipe machining, and particularly relates to the technical field of welding, and the welding device for hollow cast iron pipe machining comprises a cast iron pipe body and a flange plate body installed on a port of the cast iron pipe body. The welding device can be freely assembled on cast iron pipe bodies of different sizes to complete welding work, is not limited by the working environment, can complete welding machining only by being rapidly assembled on the cast iron pipe bodies, can automatically complete positioning work, and is small in occupied area, flexible to assemble and convenient to use. Meanwhile, the flange plate body can be stably pushed to the cast iron pipe body through cooperation of the multiple clamping arm pieces and the reinforcing pieces, the concentricity of the flange plate body and the cast iron pipe body is guaranteed, and switching control over the multiple clamping arm pieces and the welding unit can be completed through the driving unit; welding machining of the flange plate body and the cast iron pipe body can be rapidly and stably completed, and the welding technology is optimized.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and specifically to a welding device and method for the processing of hollow cast iron pipes. Background Art

[0002] Cast iron pipes are pipes cast from cast iron. Due to their excellent corrosion resistance and wear resistance characteristics, cast iron pipes are often used in drainage systems, fire protection systems, and sewage treatment systems, and can maintain stable performance for a long time, greatly extending the service life of the pipes. According to different interface forms, cast iron pipes are divided into flexible interfaces, flange interfaces, self-anchoring interfaces, rigid interfaces, etc. At the same time, during the laying and processing of cast iron pipes, it is necessary to weld flange plates at the ports of the cast iron pipes according to the construction environment and installation requirements to complete subsequent transfer and assembly use. Therefore, a welding device is required for welding processing to ensure the safe and stable operation of the cast iron pipes in the future.

[0003] Referring to a flange welding device disclosed in the patent application with the publication number CN118635717A, this welding device can make the angle between the welding wire and the flange plate always 45 degrees by adjusting the self-locking telescopic rod and the installation component. At the same time, under the action of the pressing component, the welding wire always abuts against the connection between the two; during welding, the feeding mechanism will drive the welding mechanism to make a uniform circular motion around the annular track to weld the connection between the steel pipe and the flange plate, thereby ensuring the welding strength.

[0004] The above welding device can effectively complete the welding work through the cooperation of adjusting the self-locking telescopic rod and the installation component. However, the use scenario of the above welding device is limited greatly. It is necessary to transfer the cast iron pipe to the operating table through a hoisting device for subsequent welding processing. The overall flexibility of the welding device is poor, and it requires a large construction environment. The above welding device cannot quickly adapt to the construction environment of the cast iron pipe to complete the welding processing, cannot be quickly assembled on cast iron pipes of different sizes for welding processing, and cannot quickly perform rapid positioning processing on the flange plate and the cast iron pipe, which is not conducive to the rapid laying and processing of cast iron pipes and increases the welding construction difficulty. Summary of the Invention

[0005] The purpose of the present invention is to provide a welding device and method for the processing of hollow cast iron pipes to solve the above technical problems.

[0006] To solve the above technical problems, the present invention is realized through the following technical solutions.

[0007] The present invention is a welding device for the processing of hollow cast iron pipes, including a cast iron pipe body and a flange plate body installed on the port of the cast iron pipe body, and further includes: The central part is extended and arranged at one end of the cast iron pipe body. An inner support fixture for expanding and fixing with the inner wall of the cast iron pipe body is arranged at the tail of the central part. A moving area is provided at the front section of the central part. A telescopic arm is slidably arranged in the moving area, and a hydraulic cylinder connected to the telescopic arm for transmission is installed on one side of the moving area. A plurality of clamping arm parts are arranged in a circular array around the front end of the telescopic arm for positioning and restricting the outer wall of the flange body. Reinforcing parts for positioning and restricting the inner wall of the flange body are arranged on the inner sides of the plurality of clamping arm parts. The hydraulic cylinder controls the plurality of clamping arm parts and the reinforcing parts to move the flange body to a predetermined welding station in cooperation, and a trigger part for driving the plurality of reinforcing parts is slidably sleeved on the telescopic arm. The welding mechanism is arranged at the front end of the telescopic arm. The welding mechanism is divided into a driving unit and a welding unit. The driving unit is used to drive the welding unit to complete circumferential rotation welding. The switching part is arranged on the driving unit to complete the switching and transmission of power. The switching part is cooperatively arranged with the reinforcing part. The opening and closing control of the switching part is completed by the contact between the reinforcing part and the port of the cast iron pipe body. The power is connected to the plurality of clamping arm parts through the switching part to complete synchronous positioning control.

[0008] Furthermore, the inner support fixture includes: The tail plate is spaced at the tail of the central part. A plurality of guide rods are arranged in a circular array between the tail plate and the central part. A sliding table is slidably sleeved outside the plurality of guide rods together. The lead screw is rotatably arranged between the tail plate and the central part. A lead screw nut fixedly connected to the sliding table is sleeved on the outside of the lead screw in a transmission manner. A plurality of friction plates are arranged in a circular array around the central part. A first arm and a second arm are respectively hinged between each friction plate and the central part on both sides. A transmission arm is hinged on both sides of each friction plate, and the tail of the transmission arm is hinged to the sliding table.

[0009] Furthermore, each clamping arm part includes: The lifting frame is arranged at the front end of the telescopic arm through a bracket. A lifting lead screw is rotatably arranged in the lifting frame. A lifting lead screw nut is slidably engaged in the lifting frame. The lifting lead screw nut is sleeved on the outside of the lifting lead screw in a transmission manner. Two lifting arms are symmetrically arranged on both sides of the lifting lead screw nut. An outer wall clamping plate is jointly arranged at the tops of the two lifting arms. Two calibration arms are symmetrically arranged on both sides of the tail of the outer wall clamping plate. The two calibration arms are in contact with the side wall of the flange body. The first bevel gear is rotatably arranged at the bottom of the lifting frame and is connected to the lifting lead screw for transmission.

[0010] Furthermore, each reinforcing part includes: A moving frame is arranged on the inner wall of the lifting frame, a slider is slidably arranged in the moving frame, a telescopic rod is fixedly arranged on the top of the slider, and the telescopic rod slides through the top of the moving frame; The inner wall plate is arranged on the top of the telescopic rod to complete the positioning of the inner wall of the flange body.

[0011] Furthermore, each inner wall panel comprises: A clamping plate seat is arranged at the top of the telescopic rod, and is located on one side below the outer wall clamping plate. A sliding area is provided in the clamping plate seat, and an inner wall clamping plate is slidably engaged in the sliding area. The propulsion chamber is arranged at one side of the sliding area. A propulsion rod connected with the inner wall clamping plate is provided in the sliding seal in the propulsion chamber, and a No. 1 pipe is provided at the tail of the propulsion chamber.

[0012] Furthermore, each triggering element comprises: An extrusion plate is slidably sleeved on the telescopic arm, and a second spring is arranged between the extrusion plate and the center piece, and the second spring is sleeved on the outside of the telescopic arm; A plurality of extrusion arms are hinged around the extrusion plate in a circular array, and the front ends of the plurality of extrusion arms are respectively hinged to a plurality of reinforcement members.

[0013] Furthermore, the driving unit comprises: A center platform is concentrically arranged at the front end of the telescopic arm, and a driving sleeve is rotatably sleeved outside the center platform; An installation area is provided in the center platform, and a No. 2 motor connected to the driving sleeve is installed in the installation area; The second bevel gear is rotatably sleeved outside the center platform and is transmission-connected with a plurality of clamping arm members.

[0014] Further, the welding unit comprises: The annular track is commonly arranged on a plurality of clamping arm members, and the annular track is arranged concentrically with the center member, and a transmission ring member which is transmission-connected to the driving sleeve is rotatably sleeved outside the annular track; A manual module is arranged on the transmission ring, an L-shaped arm is arranged at the output end of the manual module, an adjustment area is opened at the top of the L-shaped arm, a welding arm is slidably engaged in the adjustment area, an adjustment screw is passed through the top of the L-shaped arm through a threaded engagement, and the front end of the adjustment screw is rotatably connected to the welding arm; The welding part is detachably arranged at the bottom of the welding arm; The fine-tuning screw is screwed through the welding arm through a thread, and an extrusion wheel is arranged at the front end of the fine-tuning screw through a bracket.

[0015] Furthermore, the switching element comprises: The annular circular cavity is fixedly sleeved outside the driving sleeve. A sealing ring is rotationally and sealingly sleeved outside the annular circular cavity. An extrusion ring is slidably arranged in the annular circular cavity. The extrusion ring divides both sides of the annular circular cavity into a first cavity and a second cavity. A plurality of control rods are arranged in a circular array on the extrusion ring. Both ends of the plurality of control rods pass through the annular circular cavity. A third spring is sleeved outside each of the plurality of control rods. The plurality of third springs are located in the first cavity. A plurality of second pipes communicating with the second cavity are communicated around the sealing ring. The plurality of second pipes are respectively communicated with the reinforcement member through pipelines; The first friction ring is slidably arranged outside the driving sleeve and fixedly connected to the front ends of the plurality of control rods; The second friction ring is arranged on the back of the second bevel gear and is in transmission connection through frictional contact between the first friction ring and the second friction ring.

[0016] The present invention also provides a welding method for processing hollow cast iron pipes. The welding method specifically includes the following steps: Step 1: Pre-assemble the flange plate body on the welding device, and control the synchronous telescopic movement of the plurality of clamping arm members to complete the preliminary clamping and positioning of the flange plate body; Step 2: Then push one end of the central member of the welding device into the cast iron pipe body correspondingly, and control the inner support fixture to work to complete the connection and fixation with the cast iron pipe body; Step 3: Control the telescopic arm, the plurality of clamping arm members, and the flange plate body to feed towards one side of the cast iron pipe body to a predetermined welding position through the hydraulic cylinder. In this path, the triggering member first controls the synchronous movement of the plurality of reinforcement members to complete the clamping and positioning of the inner wall of the flange plate body; Step 4: Through the design of the reinforcement member, when the flange plate body is close to and contacts the cast iron pipe body, the inner wall plate member moves accordingly, and the switching member is synchronously controlled to complete the movement cooperation, so that the power connection between the switching member and the plurality of reinforcement members is interrupted; Step 5: Finally, control the welding unit to rotate circumferentially through the driving unit to perform rapid welding processing.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention is provided with a plurality of clamping arm members. The power of the driving unit is connected to the plurality of clamping arm members through the switching member. The synchronous telescopic movement of the plurality of clamping arm members is controlled to complete the preliminary clamping and positioning of the flange plate body. The connection and fixation with the cast iron pipe body are completed through the inner support fixture. The concentric design of the inner support fixture and the plurality of clamping arm members ensures the concentricity consistency between the cast iron pipe body and the flange plate body, which is beneficial for subsequent alignment, reduces the debugging difficulty, and improves the welding quality; 2. The present invention controls the telescopic arm, multiple clamping arm members, and the flange body to feed towards one side of the cast iron pipe body to a predetermined welding position through a hydraulic cylinder. In this path, the triggering member first controls the synchronous movement of multiple reinforcing members to complete the clamping and positioning of the inner wall of the flange body, further ensuring the concentricity of the flange body and simultaneously ensuring the stable state of the flange body. With the design of the reinforcing members, when the flange body approaches and contacts the cast iron pipe body, the inner wall plate member actively avoids, and the synchronous control switching member completes the movement cooperation, so that the power connection between the switching member and multiple reinforcing members is interrupted, reducing the control difficulty and enabling the active power switching operation to be completed; 3. The present invention relies on the cooperation of multiple clamping arm members and reinforcing members to stably push the flange body onto the cast iron pipe body, ensuring the concentricity of the flange body and the cast iron pipe body, reducing the subsequent debugging difficulty, improving the alignment efficiency, and being able to complete the switching control of multiple clamping arm members and the welding unit through the drive unit, reducing the control difficulty, quickly and stably completing the welding process of the flange body and the cast iron pipe body, optimizing the welding process, and reducing the welding difficulty of the cast iron pipe body.

[0018] Of course, it is not necessary for any product implementing the present invention to simultaneously achieve all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the overall front view of the present invention; Figure 2 It is the installation schematic diagram of the central member of the present invention inside the cast iron pipe; Figure 3 It is the installation schematic diagram of the inner support fixture of the present invention on the central member; Figure 4 It is the installation schematic diagram of the flange body of the present invention on multiple clamping arm members; Figure 5 It is the schematic diagram of the inner support fixture of the present invention; Figure 6 It is the installation schematic diagram of the telescopic arm of the present invention on the central member; Figure 7 It is the distribution schematic diagram of the extrusion plate and the extrusion arm of the present invention; Figure 8 It is the distribution schematic diagram of the outer wall clamping plate and the inner wall plate member of the present invention; Figure 9 It is the contact schematic diagram between the inner wall plate member and the flange body of the present invention; Figure 10 It is the schematic diagram of the inner wall plate member of the present invention; Figure 11 It is the installation schematic diagram of the calibration arm on the outer wall clamping plate of the present invention; Figure 12 It is the schematic diagram of the drive unit of the present invention; Figure 13 Schematic diagram of the second bevel gear of the present invention meshing with multiple first bevel gears; Figure 14 Schematic diagram of the distribution of the switching member and the second bevel gear of the present invention; Figure 15 Schematic diagram of the switching member of the present invention.

[0020] In the figure: 1, cast iron pipe body; 2, flange plate body; 3, central member; 4, second friction ring; 5, telescopic arm; 6, hydraulic cylinder; 7, sliding table; 8, lead screw; 9, lead screw nut; 10, friction plate; 11, transmission arm; 12, lifting frame; 13, lifting lead screw; 14, lifting lead screw nut; 15, lifting arm; 16, outer wall clamping plate; 17, calibration arm; 18, first bevel gear; 19, moving frame; 20, slider; 21, telescopic rod; 22, clamping plate seat; 23, inner wall clamping plate; 24, propulsion chamber; 25, propulsion rod; 26, extrusion plate; 27, second spring; 28, extrusion arm; 29, central platform; 30, driving sleeve; 31, second motor; 32, second bevel gear; 33, annular track; 34, transmission ring member; 35, manual module; 36, L-shaped arm; 37, welding arm; 38, adjusting screw; 39, welding piece; 40, fine-tuning screw; 41, extrusion wheel; 42, annular circular cavity; 43, sealing ring; 44, extrusion ring; 45, first chamber; 46, second chamber; 47, control rod; 48, third spring; 49, second pipe; 50, first friction ring. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0023] Embodiment 1: The present invention provides a technical solution: As Figure 1 , Figure 2 and Figure 3 shown, a welding device for processing hollow cast iron pipes includes a cast iron pipe body 1 and a flange plate body 2 installed on the port of the cast iron pipe body 1, and further includes: As Figure 6As shown, the center piece 3 is extended and arranged at one end of the cast iron pipe body 1, and an inner support fixture is arranged at the tail of the center piece 3 to support and fix with the inner wall of the cast iron pipe body 1, and a moving area is opened at the front section of the center piece 3, and a telescopic arm 5 is slidably arranged in the moving area, and a hydraulic cylinder 6 connected to the telescopic arm 5 is installed on one side of the moving area; like Figure 4 As shown, a plurality of clamping arm members are arranged in a circular array around the front end of the telescopic arm 5 for positioning and limiting the outer wall of the flange body 2, and a reinforcement member for positioning and limiting the inner wall of the flange body 2 is arranged on the inner side of the plurality of clamping arm members. The plurality of clamping arm members and the reinforcement member are controlled by the hydraulic cylinder 6 to move to the predetermined welding position in coordination with the flange body 2, and a trigger member for driving the plurality of reinforcement members is slidably sleeved on the telescopic arm 5; The welding mechanism is arranged at the front end of the telescopic arm 5. The welding mechanism is divided into a driving unit and a welding unit. The driving unit is used to drive the welding unit to complete circular rotation welding. The switching member is arranged on the driving unit to complete the switching transmission of power. The switching member is arranged in coordination with the reinforcing member. The opening and closing control of the switching member is completed by contact between the reinforcing member and the port 1 of the cast iron pipe body. The power is connected to multiple clamping arm members through the switching member to complete the synchronous positioning control.

[0024] Among them, electrical components such as the No. 1 motor, the No. 2 motor 31, the hydraulic cylinder 6 and the welding part 39 are all connected to switches through wires, and the switches are electrically connected to the controller, and the specific structure of the controller is not limited.

[0025] Embodiment 2: Based on the clamping arm member provided in Embodiment 1, this embodiment provides a further technical solution for the clamping arm member.

[0026] like Figure 5 As shown, the inner support fixture includes: The tail plate is arranged at intervals at the tail of the center piece 3, and a plurality of guide rods are arranged in a circular array between the tail plate and the center piece 3, and a slide table 7 is slidably sleeved on the outer sides of the plurality of guide rods; The screw rod 8 is rotatably arranged between the tail plate and the center piece 3. A screw nut 9 fixedly connected to the slide 7 is arranged on the outer transmission sleeve of the screw rod 8. A No. 1 motor connected to the screw rod 8 is arranged on the tail plate. A plurality of friction plates 10 are arranged in a circular array around the center piece 3. An arm No. 1 and an arm No. 2 are respectively hinged between the two sides of each friction plate 10 and the center piece 3. The arm No. 1 and the arm No. 2 are arranged at intervals. The movement guidance and restriction of the friction plate 10 are completed by the arm No. 1 and the arm No. 2. A transmission arm 11 is hingedly arranged on both sides of each friction plate 10, and the tail of the transmission arm 11 is hingedly arranged with the slide 7. The transmission arm 11 is located between the arm No. 1 and the arm No. 2, and the movement control of the friction plate 10 is completed by the transmission arm 11; It should be noted that when the welding device is connected to the cast iron pipe body 1: by providing an internal support fixture, the central member 3 is pushed into the cast iron pipe body 1, and then the first motor is started. The lead screw nut 9 and the slide table 7 are driven to move via the lead screw 8. The transmission arm 11 is driven to move via the slide table 7, and a plurality of friction plates 10 are pushed to move synchronously and frictionally contact the inner wall of the cast iron pipe body 1. Since the friction plates 10 are restricted by the first arm and the second arm, the plurality of friction plates 10 can move stably and can be freely expanded on cast iron pipe bodies 1 of different sizes to complete the welding work, enriching the construction environment, reducing the floor area, and being flexible in operation; As Figure 11 shown, in the embodiment of the present invention, each clamping arm member includes: A lifting frame 12 is arranged at the front end of the telescopic arm 5 through a bracket. A lifting lead screw 13 is rotatably arranged in the lifting frame 12. A lifting lead screw nut 14 is slidably engaged in the lifting frame 12, and the lifting lead screw nut 14 is sleeved outside the lifting lead screw 13; Two lifting arms 15 are symmetrically arranged on both sides of the lifting lead screw nut 14. An outer wall clamping plate 16 is jointly arranged at the tops of the two lifting arms 15. The outer wall clamping plate 16 is specifically composed of a calibration plate and a pressing plate. The pressing plate and the calibration plate are arranged in an L shape. The calibration plate and the two calibration arms 17 are in the same horizontal plane for calibration. Two calibration arms 17 are symmetrically arranged on both sides of the tail of the outer wall clamping plate 16, and the two calibration arms 17 are in contact with the side wall of the flange plate body 2; A first bevel gear 18 is rotatably arranged at the bottom of the lifting frame 12 and is in transmission connection with the lifting lead screw 13; It should be noted that when the flange plate body 2 is initially positioned: by providing a plurality of clamping arm members, the flange plate body 2 is first sleeved on the central member 3 and is initially connected to the plurality of outer wall clamping plates 16. Under normal conditions, the switching member controls the first friction ring 50 to frictionally contact the second friction ring 4 to complete the power connection. At this time, under the transmission of the driving unit, the second friction ring 4 and the second bevel gear 32 rotate synchronously. The second bevel gear 32 drives a plurality of first bevel gears 18 to rotate synchronously. When the lifting lead screw 13 rotates, the lifting lead screw nut 14 is driven to move up and down in the lifting frame 12, and the two lifting arms 15 and the outer wall clamping plate 16 are driven to perform synchronous lifting adjustment, so that the outer wall clamping plate 16 clamps and fixes the outer wall of the flange plate body 2. At the same time, the side wall of the flange plate body 2 is closely attached to the calibration plate and the calibration arms 17 of the outer wall clamping plate 16, which is beneficial for subsequent alignment control; In the embodiment of the present invention, each reinforcing member includes: The moving frame 19 is arranged on the inner wall of the lifting frame 12. A slider 20 is slidably arranged in the moving frame 19. A telescopic rod 21 is fixedly arranged on the top of the slider 20. The telescopic rod 21 slidably passes through the top of the moving frame 19. The telescopic rod 21 specifically includes a telescopic sleeve. The bottom of the telescopic sleeve is connected to the slider 20. An adjusting arm is slidably sleeved in the telescopic sleeve. A plurality of positioning holes are evenly formed in the side wall of the adjusting arm. A positioning bolt is arranged at the top of one side of the telescopic sleeve. The positioning bolt is inserted into the corresponding positioning hole to complete the telescopic adjustment. At the same time, the telescopic rod 21 can be replaced by other manual telescopic rods 21 for use; The inner wall plate member is arranged at the top of the telescopic rod 21 to complete the positioning of the inner wall of the flange body 2; Such as Figure 9 And Figure 10 As shown, each inner wall plate member includes: The clamping plate seat 22 is arranged at the top of the telescopic rod 21. The clamping plate seat 22 is located at one side below the outer wall clamping plate 16. A sliding area is formed in the clamping plate seat 22. An inner wall clamping plate 23 is slidably clamped in the sliding area. A track for restricting the inner wall clamping plate 23 is formed in the sliding area. And the clamping plate seat 22 is arranged in a staggered manner with the outer wall clamping plate 16. The inner wall clamping plate 23 slides out of the clamping plate seat 22 and extends below the flange body 2; The propulsion chamber 24 is arranged on one side in the sliding area. A propulsion rod 25 connected to the inner wall clamping plate 23 is slidably sealed in the propulsion chamber 24. The propulsion rod 25 is composed of a piston plate and a piston rod. The piston plate is slidably arranged in the propulsion chamber 24. The piston rod is integrally arranged on the piston plate and is detachably and fixedly connected to the inner wall clamping plate 23. A first pipe is arranged at the tail of the propulsion chamber 24. And a first spring for resetting is arranged between the propulsion chamber 24 and the propulsion rod 25; Such as Figure 7 And Figure 8 As shown in the embodiments of the present invention, each triggering member includes: The extrusion plate 26 is slidably sleeved on the telescopic arm 5. A second spring 27 is arranged between the extrusion plate 26 and the central member 3. The second spring 27 is sleeved outside the telescopic arm 5. The elastic strength of the second spring 27 can be freely replaced according to the construction environment; A plurality of extrusion arms 28 are circularly and arrayedly hinged around the extrusion plate 26. The front ends of the plurality of extrusion arms 28 are respectively hinged to the sliders 20 of the plurality of reinforcement members; It is worth mentioning that: when the flange body 2 and the cast iron pipe body 1 are aligned and moved: after the welding device and the cast iron pipe body 1 are fixed by the inner support clamp, the hydraulic cylinder 6 is started to move, and the telescopic arm 5 is pulled to move, so that the multiple clamping arm parts and the flange body 2 thereon move toward the welding position of the cast iron pipe body 1. Due to the design of the No. 2 spring 27 and the extrusion plate 26, when the telescopic arm 5 is reset toward the moving area, the No. 2 spring 27 first limits the position of the extrusion plate 26, so that the distance between the front end of the telescopic arm 5 and the extrusion plate 26 is gradually reduced, and the extrusion arm 28 is controlled by the extrusion force to move, pushing the slider 20 and the telescopic rod 21 to rise in the moving frame 19, so that the inner wall panel moves up and is fixed to the inner wall of the flange body 2. With the cooperation of the inner wall panel and the outer wall clamping plate 16, the inner and outer synchronous clamping and fixing of the flange body 2 are completed, ensuring the flange body 2 Concentricity and stable state, then the hydraulic cylinder 6 continues to pull the telescopic arm 5 to reset continuously. At this time, the telescopic arm 5 continues to apply pressure to the extrusion ring 44 and the second spring 27, so that the inner wall plate is in stable contact with the flange body 2, and finally the flange body 2 is pulled to move to the predetermined welding position of the cast iron pipe body 1, that is, the contact position between the calibration arm 17 and the port of the cast iron pipe body 1. The calibration of the welding position of the flange body 2 is completed through the contact between the calibration arm 17 and the port of the cast iron pipe body 1 to avoid the problem of excessive movement. Based on multiple clamping arms and reinforcements, the concentricity of the flange body 2 and the cast iron pipe body 1 is guaranteed, and the welding position of the flange body 2 is calibrated in advance, which can quickly and accurately move the flange body 2 to the welding position without repeated adjustment, thereby reducing the difficulty of debugging, facilitating the efficient and stable welding work, and reducing the difficulty of operation for construction personnel.

[0027] Embodiment 3: Based on the welding mechanism provided in Embodiment 1, this embodiment provides a further technical solution of the welding mechanism.

[0028] like Figure 12 and Figure 13 As shown, the drive unit includes: A center platform 29 is concentrically arranged at the front end of the telescopic arm 5, and a driving sleeve 30 is rotatably sleeved outside the center platform 29; An installation area is provided in the center platform 29, and a second motor 31 drivingly connected to a driving sleeve 30 is installed in the installation area; The second bevel gear 32 is rotatably sleeved outside the center platform 29 and meshes with the first bevel gear 18 of the plurality of clamping arms. The second bevel gear 32 is spaced apart from the driving sleeve 30, and an annular slideway is provided on the center platform 29 to cooperate with the second bevel gear 32; In an embodiment of the present invention, the welding unit comprises: The annular track 33 is commonly provided on the plurality of lifting frames 12, and the annular track 33 is concentrically provided with the center piece 3, and a transmission ring piece 34 which is transmission-connected with the driving sleeve 30 is rotatably sleeved outside the annular track 33; A manual module 35 is arranged on the transmission ring 34. An L-shaped arm 36 is arranged at the output end of the manual module 35. An adjustment area is opened at the top of the L-shaped arm 36. A welding arm 37 is slidably engaged in the adjustment area. An adjustment screw 38 is threadedly screwed through the top of the L-shaped arm 36. The front end of the adjustment screw 38 is rotatably connected to the welding arm 37. The welding part 39 is detachably arranged at the bottom of the welding arm 37. Specifically, the welding part 39 is connected to the welding arm 37 through a quick-release part. The welding part 39 is specifically a welding gun. The welding process of the flange body 2 and the cast iron pipe body 1 is completed through the welding part 39. The fine-tuning screw 40 is screwed through the welding arm 37, and an extrusion wheel 41 is provided at the front end of the fine-tuning screw 40 through a bracket. The extrusion wheel 41 contacts the flange body 2 to complete the extrusion restriction. The fine-tuning screw 40 is rotatably connected with the extrusion wheel 41, and a restriction rod is installed on one side of the back of the extrusion wheel 41. The restriction rod is correspondingly slidably arranged through the welding arm 37; It is worth noting that when welding the flange body 2 and the cast iron pipe: by providing a welding mechanism, first adjust the manual module 35 to control the L-shaped arm 36 to rise and fall to a predetermined height, then rotate the adjusting screw 38 to push the welding arm 37 to move in the adjustment area, which is conducive to controlling the welding position of the welding piece 39, and then rotate the fine-tuning screw 40 to push the extrusion wheel 41 to move and contact with the flange body 2, and then drive the welding piece 39 through the driving sleeve 30 to complete the circumferential rotation welding process. The design of the extrusion wheel 41 enables the flange body 2 to be continuously extruded through the extrusion wheel 41 on the circumferential welding path, ensuring the stable state of the flange body 2, while ensuring the stability of the welding position of the welding piece 39, improving the welding quality, and facilitating the operation of the construction personnel. The welding mechanism is based on the design of the inner support clamp, multiple clamping arm members and multiple reinforcement members, and can perform stable self-positioning operations on the flange body 2, ensuring the rapid and stable progress of subsequent welding work, improving welding efficiency, and greatly reducing the workload of repeated debugging; like Figure 14 and Figure 15 As shown, in the embodiment of the present invention, the switching element includes: The annular circular cavity 42 is fixedly sleeved outside the driving sleeve 30. A sealing ring 43 is rotationally and sealingly sleeved outside the annular circular cavity 42. An extrusion ring 44 is slidably arranged in the annular circular cavity 42. The extrusion ring 44 divides both sides of the annular circular cavity 42 into a first cavity 45 and a second cavity 46. A plurality of control rods 47 are arranged in a circular array on the extrusion ring 44. Both ends of the plurality of control rods 47 pass through the annular circular cavity 42. A third spring 48 is sleeved outside each of the plurality of control rods 47. The plurality of third springs 48 are located in the first cavity 45. A plurality of second pipes 49 communicating with the second cavity 46 are arranged around the sealing ring 43. The plurality of second pipes 49 are respectively communicated with the first pipe through pipelines. A plurality of stop blocks are arranged in the second cavity 46 of the annular circular cavity 42. The active limit of the extreme position of the extrusion ring 44 is completed through the plurality of stop blocks. A medium is injected into the second cavity 46 of the annular circular cavity 42. The medium is specifically hydraulic oil; The first friction ring 50 is slidably arranged outside the driving sleeve 30 and fixedly connected to the front ends of the plurality of control rods 47; The second friction ring 4 is arranged on the back of the second bevel gear 32. The transmission connection is completed through the frictional contact between the first friction ring 50 and the second friction ring 4. The first friction ring 50 is pushed by the third spring 48 to be in frictional contact with the second friction ring 4. The contact surfaces of the first friction ring 50 and the second friction ring 4 are both made of high-friction materials, and stable transmission can be completed; It should be noted that when controlling the switching part: By providing the switching part, under normal conditions, the extrusion ring 44 is extruded through the plurality of third springs 48, so that the medium in the second cavity 46 is extruded into the plurality of propulsion chambers 24 for temporary storage. At this time, the first friction plate 10 and the second friction plate 10 are in frictional transmission contact. Therefore, only by starting the second motor 31, the driving sleeve 30 can be controlled to rotate on the center table 29, and the power is transmitted to the second bevel gear 32 through the friction of the first friction plate 10 and the second friction plate 10, and the meshing transmission control of the plurality of first bevel gears 18 is completed. When the flange body 2 moves towards the welding position of the cast iron pipe body 1, since the inner wall plate member corresponds to the port of the cast iron pipe body 1, during the movement of the flange body 2 to the welding position, the inner wall clamping plate 23 first contacts the port of the cast iron pipe body 1, and then driven by the pulling force of the hydraulic cylinder 6, the inner wall clamping plate 23 moves in the clamping seat 22 and gradually separates from the flange body 2, so that the flange body 2 gradually transitions to the cast iron pipe body 1 and waits for welding. When the inner wall clamping plate 23 moves in the clamping seat 22, the propulsion rod 25 moves in the propulsion chamber 24, and the medium in the propulsion chamber 24 is conveyed to the second cavity 46 of the annular circular cavity 42 through the first pipe and the second pipes 49, thereby pushing the extrusion ring 44 to move in the annular circular cavity 42 against the plurality of third springs 48, and pulling the first friction ring 50 to separate from the second friction ring 4 through the plurality of control rods 47 to complete power interruption, which is beneficial to the subsequent welding work.

[0029] Example 4: A welding method for processing hollow cast iron pipes, which specifically includes the following steps: Step 1: Pre-assemble the flange body 2 on the welding device, and control the synchronous telescopic movement of multiple clamping arm parts to complete the preliminary clamping and positioning of the flange body 2; Step 2: Then, push one end of the central part 3 of the welding device into the cast iron pipe body 1 correspondingly, and control the inner support fixture to work to complete the connection and fixation with the cast iron pipe body 1; Step 3: Control the telescopic arm 5, multiple clamping arm parts, and the flange body 2 to feed towards the side of the cast iron pipe body 1 to a predetermined welding position through the hydraulic cylinder 6. In this path, the triggering part first controls the synchronous movement of multiple reinforcement parts to complete the clamping and positioning of the inner wall of the flange body 2; Step 4: Through the design of the reinforcement parts, when the flange body 2 is close to and contacts the cast iron pipe body 1, the inner wall plate parts move accordingly, and synchronously control the switching part to complete the movement coordination, so that the power connection between the switching part and multiple reinforcement parts is interrupted; Step 5: Finally, control the welding unit to rotate circumferentially through the driving unit to perform rapid welding processing.

[0030] The present invention provides a welding device and method for processing hollow cast iron pipes. The specific working principle is as follows: First, move the welding device to the construction area, then pre-assemble the flange body 2 on the welding device. By providing multiple clamping arm parts, the power of the driving unit is connected to multiple clamping arm parts via the switching part, and control the synchronous telescopic movement of multiple clamping arm parts to complete the preliminary clamping and positioning of the flange body 2. Then, push one end of the central part 3 of the welding device into the cast iron pipe body 1 correspondingly, and control the inner support fixture to work to complete the connection and fixation with the cast iron pipe body 1. The concentric design of the inner support fixture and multiple clamping arm parts ensures the concentricity consistency between the cast iron pipe body 1 and the flange body 2, which is beneficial for subsequent alignment, reduces the debugging difficulty, and improves the welding quality; By providing a hydraulic cylinder 6, control the telescopic arm 5, multiple clamping arm parts, and the flange body 2 to feed towards the side of the cast iron pipe body 1 to a predetermined welding position. In this path, the triggering part first controls the synchronous movement of multiple reinforcement parts to complete the clamping and positioning of the inner wall of the flange body 2, further ensuring the concentricity of the flange body 2 and at the same time ensuring the stable state of the flange body 2. With the design of the reinforcement parts, when the flange body 2 is close to and contacts the cast iron pipe body 1, the inner wall plate parts actively complete the avoidance, so that the flange body 2 stably transitions to the cast iron pipe body 1 and waits for welding. At the same time, when the inner wall plate parts act, synchronously control the switching part to complete the movement coordination, so that the power connection between the switching part and multiple reinforcement parts is interrupted. Then, control the welding unit to rotate circumferentially through the driving unit to perform rapid welding processing; This welding device can be freely assembled on the cast iron pipe body 1 of different sizes to complete the welding work, without being restricted by the working environment. It only needs to be quickly assembled on the cast iron pipe body 1 to complete the welding process. It can automatically complete the positioning work, and has a small floor area and flexible assembly. At the same time, relying on the cooperation of multiple clamping arms and reinforcement parts, it can stably push the flange body 2 onto the cast iron pipe body 1, ensuring the concentricity of the flange body 2 and the cast iron pipe body 1, reducing the subsequent debugging difficulty, improving the alignment efficiency, and through the drive unit, it can complete the switching control of multiple clamping arms and the welding unit, reducing the control difficulty, and can quickly and stably complete the welding process of the flange body 2 and the cast iron pipe body 1, optimizing the welding process and reducing the welding difficulty of the cast iron pipe body 1.

[0031] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0032] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. The present specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A welding device for processing a hollow cast iron pipe, comprising a cast iron pipe body (1) and a flange body (2) mounted on a port of the cast iron pipe body (1), characterized in that: Also includes: A center piece (3) is extended and arranged at one end of the cast iron pipe body (1), an inner support fixture is arranged at the rear end of the center piece (3) and is supported and fixed to the inner wall of the cast iron pipe body (1), a moving area is opened at the front section of the center piece (3), a telescopic arm (5) is slidably arranged in the moving area, and a hydraulic cylinder (6) connected to the telescopic arm (5) is installed on one side of the moving area; A plurality of clamping arm members are arranged in a circular array around the front end of the telescopic arm (5) for positioning and limiting the outer wall of the flange body (2); a reinforcing member for positioning and limiting the inner wall of the flange body (2) is arranged on the inner side of the plurality of clamping arm members; the plurality of clamping arm members and the reinforcing member are controlled by a hydraulic cylinder (6) to move to a predetermined welding position in coordination with the flange body (2); and a trigger member for driving the plurality of reinforcing members is slidably sleeved on the telescopic arm (5); A welding mechanism is arranged at the front end of the telescopic arm (5), the welding mechanism is divided into a driving unit and a welding unit, the driving unit is used to drive the welding unit to complete circular rotation welding; The switching member is arranged on the driving unit to complete the switching transmission of power. The switching member is arranged in coordination with the reinforcing member. The switching member is contacted with the port of the cast iron pipe body (1) to complete the opening and closing control of the switching member. The switching member connects the power to the multiple clamping arm members to complete the synchronous positioning control.

2. A welding device for processing hollow cast iron pipes according to claim 1, characterized in that: The internal support fixture includes: A tail plate is arranged at intervals at the tail of the center piece (3), a plurality of guide rods are arranged in a circular array between the tail plate and the center piece (3), and a slide table (7) is provided on the outside of the plurality of guide rods for sliding together; A screw rod (8) is rotatably disposed between the tail plate and the center piece (3), and a screw rod nut (9) fixedly connected to the slide table (7) is provided on an external transmission sleeve of the screw rod (8); A plurality of friction plates (10) are arranged in a circular array around the central member (3); a first arm and a second arm are respectively hingedly connected between the central member (3) and the two sides of each friction plate (10); a transmission arm (11) is hingedly arranged on the two sides of each friction plate (10); and the rear end of the transmission arm (11) is hingedly arranged on the slide table (7).

3. A welding device for processing hollow cast iron pipes according to claim 1, characterized in that: Each clamp arm assembly includes: A lifting frame (12) is arranged at the front end of the telescopic arm (5) through a bracket, a lifting screw (13) is rotatably arranged in the lifting frame (12), a lifting screw nut (14) is slidably engaged in the lifting frame (12), and a transmission sleeve of the lifting screw nut (14) is arranged outside the lifting screw (13); Two lifting arms (15) are symmetrically arranged on both sides of the lifting screw nut (14); an outer wall clamping plate (16) is commonly arranged on the top of the two lifting arms (15); two calibration arms (17) are symmetrically arranged on both sides of the tail of the outer wall clamping plate (16); the two calibration arms (17) are in contact with the side wall of the flange body (2); A first bevel gear (18) is rotatably arranged at the bottom of the lifting frame (12) and is transmission-connected to the lifting screw rod (13).

4. A welding device for processing hollow cast iron pipes according to claim 3, characterized in that: Each reinforcement includes: A moving frame (19) is arranged on the inner wall of the lifting frame (12), a slider (20) is slidably arranged in the moving frame (19), a telescopic rod (21) is fixedly arranged on the top of the slider (20), and the telescopic rod (21) is slidably arranged through the top of the moving frame (19); The inner wall plate is arranged on the top of the telescopic rod (21) to complete the positioning of the inner wall of the flange body (2).

5. A welding device for processing hollow cast iron pipes according to claim 4, characterized in that: Each interior wall panel includes: A clamping plate seat (22) is arranged on the top of the telescopic rod (21), the clamping plate seat (22) is located on one side below the outer wall clamping plate (16), a sliding area is provided in the clamping plate seat (22), and an inner wall clamping plate (23) is slidably engaged in the sliding area; The propulsion chamber (24) is arranged at one side of the sliding area. A propulsion rod (25) connected to the inner wall clamping plate (23) is provided in the propulsion chamber (24) in a sliding seal. A No. 1 pipe is provided at the tail of the propulsion chamber (24).

6. A welding device for processing hollow cast iron pipes according to claim 1, characterized in that: Each trigger includes: An extrusion plate (26) is slidably mounted on the telescopic arm (5), and a second spring (27) is provided between the extrusion plate (26) and the center piece (3), and the second spring (27) is mounted on the outside of the telescopic arm (5); A plurality of extrusion arms (28) are hingedly connected to the periphery of the extrusion plate (26) in a circular array, and the front ends of the plurality of extrusion arms (28) are respectively hingedly connected to a plurality of reinforcement members.

7. A welding device for processing hollow cast iron pipes according to claim 1, characterized in that: The drive unit includes: A center platform (29) is coaxially arranged at the front end of the telescopic arm (5), and a driving sleeve (30) is rotatably sleeved outside the center platform (29); An installation area is provided in the center platform (29), and a second motor (31) drivingly connected to the driving sleeve (30) is installed in the installation area; The second bevel gear (32) is rotatably sleeved outside the center platform (29) and is transmission-connected to the plurality of clamping arm members.

8. A welding device for processing hollow cast iron pipes according to claim 1, characterized in that: The welding unit includes: An annular track (33) is disposed on the plurality of clamping arm members, and the annular track (33) is disposed concentrically with the center member (3). A transmission ring member (34) is rotatably sleeved outside the annular track (33) and is transmission-connected to the driving sleeve (30); A manual module (35) is arranged on the transmission ring (34), an L-shaped arm (36) is arranged at the output end of the manual module (35), an adjustment area is opened at the top of the L-shaped arm (36), a welding arm (37) is slidably engaged in the adjustment area, and an adjustment screw (38) is threadedly screwed through the top of the L-shaped arm (36), and the front end of the adjustment screw (38) is rotatably connected to the welding arm (37); A welding member (39) is detachably disposed at the bottom of the welding arm (37); The fine-tuning screw rod (40) is threadedly screwed onto the welding arm (37), and an extrusion wheel (41) is arranged at the front end of the fine-tuning screw rod (40) via a bracket.

9. A welding device for processing hollow cast iron pipes according to claim 7, characterized in that: The switch includes: An annular cavity (42) is fixedly sleeved on the outside of the driving sleeve (30), a sealing ring (43) is provided on the rotating sealing sleeve outside the annular cavity (42), an extrusion ring (44) is slidably provided in the annular cavity (42), the extrusion ring (44) divides the two sides of the annular cavity (42) into a first cavity (45) and a second cavity (46), a plurality of control rods (47) are arranged in a circular array on the extrusion ring (44), both ends of the plurality of control rods (47) are arranged through the annular cavity (42), a third spring (48) is sleeved on the outside of the plurality of control rods (47), the plurality of third springs (48) are located in the first cavity (45), a plurality of second tubes (49) are arranged around the sealing ring (43) and communicate with the second cavity (46), and the plurality of second tubes (49) are communicated with the reinforcement member through pipelines; A first friction ring (50) is slidably disposed outside the driving sleeve (30) and is fixedly connected to the front ends of the plurality of control rods (47); The second friction ring (4) is arranged on the back of the second bevel gear (32), and the transmission connection is completed through the friction contact between the first friction ring (50) and the second friction ring (4).

10. A welding method for processing a hollow cast iron pipe, using a welding device for processing a hollow cast iron pipe as claimed in any one of claims 1 to 9, characterized in that: The welding method specifically comprises the following steps: Step 1: pre-install the flange body (2) on the welding device, and control the synchronous telescopic movement of multiple clamping arms to complete the initial clamping and positioning of the flange body (2); Step 2, then push one end of the center piece (3) of the welding device into the cast iron pipe body (1) to control the inner support clamp to complete the connection and fixation with the cast iron pipe body (1); Step 3: Control the telescopic arm (5) and the plurality of clamping arm members and the flange body (2) to advance toward one side of the cast iron pipe body (1) to a predetermined welding position through the hydraulic cylinder (6). In this path, the trigger member first controls the plurality of reinforcement members to move synchronously to complete the clamping and positioning of the inner wall of the flange body (2); Step 4: through the design of the reinforcement, when the flange body (2) and the cast iron pipe body (1) are in close contact, the inner wall plate moves accordingly, and the switching member is synchronously controlled to complete the movement coordination, so that the power connection between the switching member and the plurality of reinforcements is interrupted; Step 5: Finally, the driving unit is used to control the circular rotation of the welding unit to perform rapid welding processing.

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