Welding device and method for processing hollow cast iron pipe

Abstract

The present invention discloses a welding device and method for processing hollow cast iron pipes, and specifically relates to the field of welding technology. The welding device for processing hollow cast iron pipes comprises a cast iron pipe body and a flange body installed on the port of the cast iron pipe body. The welding device of the present invention can be freely assembled on cast iron pipe bodies of different sizes to complete welding work, is not restricted by the working environment, and can complete welding processing by simply being quickly assembled on the cast iron pipe body. It can automatically complete positioning work, occupies a small area, and is flexible to assemble. At the same time, relying on the cooperation of multiple clamping arms and reinforcement parts, the flange body can be stably pushed onto the cast iron pipe body, ensuring the concentricity of the flange body and the cast iron pipe body, and the switching control of multiple clamping arms and welding units can be completed by a driving unit, and the welding processing of the flange body and the cast iron pipe body can be completed quickly and stably, thereby optimizing the welding process.

Description

Technical Field

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

[0002] Cast iron pipes are pipes cast from cast iron. Due to their excellent corrosion and wear resistance, cast iron pipes are often used in drainage systems, fire protection systems, and sewage treatment systems. They can maintain stable performance over a long period of time, greatly extending the service life of the pipes.

[0003] Cast iron pipes are divided into flexible interfaces, flange interfaces, self-anchor interfaces, rigid interfaces, etc. according to different interface forms. At the same time, during the laying process of cast iron pipes, flanges need to be welded at the ends of the cast iron pipes according to the construction environment and installation requirements to complete the subsequent transfer assembly and use. Therefore, welding equipment is required for welding processing to ensure the safety and stability of the subsequent operation of the cast iron pipes.

[0004] A flange welding device is disclosed in a patent application with reference publication number CN118635717A. By adjusting the self-locking telescopic rod and the mounting assembly, the angle between the welding wire and the flange can always be forty-five degrees. At the same time, under the action of the pressing assembly, the welding wire always abuts the connection between the two. During welding, the feeding mechanism drives the welding mechanism to perform uniform circular motion around the circular track to weld the connection between the steel pipe and the flange, thereby ensuring the welding strength.

[0005] The above-mentioned welding device can effectively complete the welding work by adjusting the coordination of the self-locking telescopic rod and the installation component, but the use scenario of the above-mentioned welding device is greatly limited. The cast iron pipe needs to be transferred to the operating table through the lifting equipment for subsequent welding processing. The overall flexibility of the welding device is poor and it needs to occupy a larger construction environment. The above-mentioned welding device cannot be quickly adapted to complete the welding processing according to the construction environment of the cast iron pipe, and cannot be quickly and arbitrarily assembled on cast iron pipes of different sizes for welding processing, and cannot quickly position the flange and the cast iron pipe, which is not conducive to the rapid laying processing of the cast iron pipe and increases the difficulty of welding construction. Summary of the Invention

[0006] The object of the present invention is to provide a welding device and method for processing hollow cast iron pipes to solve the above technical problems.

[0007] To solve the above technical problems, the present invention is implemented through the following technical solutions.

[0008] The present invention is a welding device for processing hollow cast iron pipes, comprising a cast iron pipe body and a flange body mounted on a port of the cast iron pipe body, and further comprising:

[0009] The center piece is extended to one end of the cast iron pipe body, and an inner support clamp is provided at the tail of the center piece to support and fix the inner wall of the cast iron pipe body. A moving area is opened at the front section of the center piece, and a telescopic arm is slidably provided in the moving area. A hydraulic cylinder connected to the telescopic arm is installed on one side of the moving area.

[0010] Multiple clamping arms are arranged in a circular array around the front end of the telescopic arm for positioning and limiting the outer wall of the flange body. The inner sides of the multiple clamping arms are provided with reinforcements for positioning and limiting the inner wall of the flange body. The multiple clamping arms and reinforcements are controlled by a hydraulic cylinder to move to a predetermined welding position in coordination with the flange body. A trigger member for driving the multiple reinforcements is slidably sleeved on the telescopic arm.

[0011] 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 circular rotation welding;

[0012] The switching part is arranged on the driving unit to complete the switching transmission of power. The switching part is arranged in conjunction with the reinforcement part. The opening and closing control of the switching part is completed by the contact between the reinforcement part and the port of the cast iron pipe body. The power is connected to multiple clamping arm parts through the switching part to complete the synchronous positioning control.

[0013] Furthermore, the inner support fixture includes:

[0014] The tail plate is arranged at intervals at the tail of the center piece, and a plurality of guide rods are arranged in a circular array between the tail plate and the center piece, and a slide is provided on the outside of the plurality of guide rods;

[0015] The screw rod is rotatably arranged between the tail plate and the center piece, and a screw nut fixedly connected to the slide is provided on the transmission sleeve outside the screw rod;

[0016] Multiple friction plates are arranged in a circular array around the center piece. Arm No. 1 and Arm No. 2 are hinged between each friction plate and the center piece on both sides. Transmission arms are hinged on both sides of each friction plate, and the tail ends of the transmission arms are hinged to the slide.

[0017] Furthermore, each clamping arm member includes:

[0018] The lifting frame is arranged at the front end of the telescopic arm through a bracket. A lifting screw is rotatably arranged in the lifting frame. A lifting screw nut is slidably engaged in the lifting frame. The lifting screw nut transmission sleeve is arranged on the outside of the lifting screw.

[0019] Two lifting arms are symmetrically arranged on both sides of the lifting screw nut, and an outer wall splint is commonly provided on the top of the two lifting arms. Two calibration arms are symmetrically provided on both sides of the tail of the outer wall splint, and the two calibration arms are in contact with the side wall of the flange body;

[0020] The first bevel gear is rotatably arranged at the bottom of the lifting frame and is connected to the lifting screw rod.

[0021] Furthermore, each reinforcement member includes:

[0022] 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;

[0023] 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.

[0024] Furthermore, each inner wall panel comprises:

[0025] The splint seat is arranged on the top of the telescopic rod, and is located on one side below the outer wall splint. A sliding area is opened in the splint seat, and the inner wall splint is slidably engaged in the sliding area.

[0026] The propulsion chamber is arranged on one side of the sliding area. A propulsion rod connected to the inner wall splint is provided in the propulsion chamber for sliding sealing, and a No. 1 pipe is provided at the tail of the propulsion chamber.

[0027] Furthermore, each trigger element includes:

[0028] An extrusion plate is slidably mounted on the telescopic arm, and a second spring is provided between the extrusion plate and the center piece, and the second spring is mounted on the outside of the telescopic arm;

[0029] 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 hinged to the plurality of reinforcement members respectively.

[0030] Furthermore, the driving unit includes:

[0031] The center platform is concentrically arranged at the front end of the telescopic arm, and a driving sleeve is rotatably sleeved on the outside of the center platform;

[0032] The installation area is provided in the center platform, and a No. 2 motor connected to the drive sleeve is installed in the installation area;

[0033] The second bevel gear is rotatably sleeved on the outside of the center platform and is transmission-connected with a plurality of clamping arm members.

[0034] Furthermore, the welding unit comprises:

[0035] The annular track is provided on the plurality of clamping arm members, and the annular track is provided concentrically with the center member, and a transmission ring member connected to the driving sleeve is provided on the outside of the annular track;

[0036] A manual module is provided on the transmission ring. An L-shaped arm is provided at the output end of the manual module. An adjustment area is provided at the top of the L-shaped arm. A welding arm is slidably engaged in the adjustment area. An adjustment screw is threadedly inserted through the top of the L-shaped arm. The front end of the adjustment screw is rotatably connected to the welding arm.

[0037] Welding parts, detachably arranged at the bottom of the welding arm;

[0038] 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.

[0039] Furthermore, the switching element includes:

[0040] An annular cavity is fixedly sleeved on the outside of the driving sleeve. A sealing ring is provided on the rotating sealing sleeve outside the annular cavity. An extrusion ring is slidably provided in the annular cavity. The extrusion ring divides the two sides of the annular cavity into a No. 1 cavity and a No. 2 cavity. A plurality of control rods are provided in a circular array on the extrusion ring. Both ends of the plurality of control rods pass through the annular cavity. A No. 3 spring is sleeved on the outside of the plurality of control rods. The plurality of No. 3 springs are located in the No. 1 cavity. A plurality of No. 2 pipes communicating with the No. 2 cavity are provided around the sealing ring. The plurality of No. 2 pipes are respectively communicated with the reinforcement through pipelines.

[0041] A first friction ring is slidably disposed outside the drive sleeve and fixedly connected to the front ends of the plurality of control rods;

[0042] The second friction ring is arranged on the back of the second bevel gear, and the transmission connection is completed through the friction contact between the first friction ring and the second friction ring.

[0043] The present invention also provides a welding method for processing hollow cast iron pipes, which specifically includes the following steps:

[0044] Step 1: Pre-install the flange body 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;

[0045] Step 2: Push one end of the center piece of the welding device into the cast iron pipe body, and control the inner support fixture to complete the connection and fixation with the cast iron pipe body;

[0046] Step 3: The hydraulic cylinder controls the telescopic arm, the multiple clamping arms, and the flange body to advance toward the side of the cast iron pipe body to the predetermined welding position. During this process, the trigger first controls the multiple reinforcement members to move synchronously to complete the clamping and positioning of the inner wall of the flange body.

[0047] Step 4: Through the design of the reinforcement, when the flange body and the cast iron pipe body come into close contact, the inner wall plate moves accordingly, and the switching member is synchronously controlled to complete the movement and coordination, so that the power connection between the switching member and the multiple reinforcements is interrupted;

[0048] Step 5: Finally, the driving unit is used to control the circular rotation of the welding unit to perform rapid welding processing.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] 1. The present invention is provided with multiple clamping arms, and the power of the driving unit is connected to the multiple clamping arms via a switching member. The multiple clamping arms are controlled to move synchronously to complete the initial clamping and positioning of the flange body. The connection and fixation are completed by the inner support clamp and the cast iron pipe body. The concentric design of the inner support clamp and the multiple clamping arms ensures the concentricity consistency of the cast iron pipe body and the flange body, facilitates subsequent alignment, reduces the difficulty of debugging, and improves the welding quality.

[0051] 2. The present invention uses a hydraulic cylinder to control the telescopic arm and multiple clamping arm members, and the flange body to be fed toward one side of the cast iron pipe body to a predetermined welding position. During this path, the trigger member first controls the synchronous movement of multiple reinforcement members to complete the clamping and positioning of the inner wall of the flange body, further ensuring the concentricity of the flange body and the stability of the flange body. The reinforcement member design adopts that when the flange body and the cast iron pipe body are close to each other, the inner wall plate actively completes the avoidance, and the switching member is synchronously controlled to complete the movement and coordination, so that the power connection between the switching member and the multiple reinforcement members is interrupted, which reduces the control difficulty and can complete the active power switching operation;

[0052] 3. The present invention relies on the cooperation of multiple clamping arms and reinforcement members to stably push the flange body onto the cast iron pipe body, thereby ensuring the concentricity of the flange body and the cast iron pipe body, reducing the difficulty of subsequent debugging, and improving the alignment efficiency. In addition, the driving unit can complete the switching control of multiple clamping arms and welding units, reducing the control difficulty, and can quickly and stably complete the welding process of the flange body and the cast iron pipe body, optimize the welding process, and reduce the welding difficulty of the cast iron pipe body.

[0053] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is the overall front view of the present invention;

[0055] Figure 2 This is a schematic diagram of the installation of the center piece of the present invention in a cast iron pipe;

[0056] Figure 3 This is a schematic diagram of the installation of the inner support fixture of the present invention on the center piece;

[0057] Figure 4 This is a schematic diagram of the flange body of the present invention being installed on multiple clamping arms;

[0058] Figure 5 Schematic diagram of the inner support fixture of the present invention;

[0059] Figure 6 This is a schematic diagram of the installation of the telescopic arm of the present invention on the center piece;

[0060] Figure 7 This is a schematic diagram of the distribution of the extrusion plate and the extrusion arm of the present invention;

[0061] Figure 8 This is a schematic diagram of the distribution of the outer wall plywood and inner wall panels of the present invention;

[0062] Figure 9 This is a schematic diagram of the contact between the inner wall panel and the flange body of the present invention;

[0063] Figure 10 is a schematic diagram of the inner wall panel of the present invention;

[0064] Figure 11 This is a schematic diagram of the installation of the calibration arm of the present invention on the outer wall splint;

[0065] Figure 12 is a schematic diagram of a driving unit of the present invention;

[0066] Figure 13 A schematic diagram of the meshing of the second bevel gear and a plurality of first bevel gears according to the present invention;

[0067] Figure 14 This is a schematic diagram of the distribution of the switching member and the second bevel gear of the present invention;

[0068] Figure 15 Schematic diagram of the switching element of the present invention.

[0069] Figure: 1, cast iron pipe body; 2, flange body; 3, center piece; 4, friction ring No. 2; 5, telescopic arm; 6, hydraulic cylinder; 7, slide; 8, screw; 9, screw nut; 10, friction plate; 11, transmission arm; 12, lifting frame; 13, lifting screw; 14, lifting screw nut; 15, lifting arm; 16, outer wall clamping plate; 17, calibration arm; 18, No. 1 bevel gear; 19, moving frame; 20, slide; 21, telescopic rod; 22, clamping plate seat; 23, inner wall clamping plate; 24, propulsion chamber; 25, propulsion rod; 26, extrusion Pressure plate; 27. Spring No. 2; 28. Extrusion arm; 29. ​​Center table; 30. Drive sleeve; 31. Motor No. 2; 32. Bevel gear No. 2; 33. Annular track; 34. Transmission ring; 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 cavity; 43. Sealing ring; 44. Extrusion ring; 45. Cavity No. 1; 46. Cavity No. 2; 47. Control lever; 48. Spring No. 3; 49. Tube No. 2; 50. Friction ring No. 1. DETAILED DESCRIPTION

[0070] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0071] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as limiting the present invention.

[0072] Embodiment 1: The present invention provides a technical solution: Figure 1 、 Figure 2 and Figure 3 As shown, a welding device for processing hollow cast iron pipes includes a cast iron pipe body 1 and a flange body 2 installed on the end of the cast iron pipe body 1, and further includes:

[0073] like Figure 6 As shown, the center piece 3 is extended to one end of the cast iron pipe body 1, and an internal support fixture is provided at the tail end of the center piece 3 to support and fix the inner wall of the cast iron pipe body 1. A moving area is opened at the front section of the center piece 3, and a telescopic arm 5 is slidably provided in the moving area. A hydraulic cylinder 6 connected to the telescopic arm 5 is installed on one side of the moving area.

[0074] like Figure 4As shown, multiple clamping arms 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. The inner sides of the multiple clamping arms are provided with reinforcements for positioning and limiting the inner wall of the flange body 2. The multiple clamping arms and reinforcements 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 multiple reinforcements is slidably sleeved on the telescopic arm 5;

[0075] 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;

[0076] The switching part is arranged on the driving unit to complete the switching transmission of power. The switching part is arranged in conjunction with the reinforcement part. The opening and closing control of the switching part is completed by contacting the reinforcement part with the end of the cast iron pipe body 1. The power is connected to multiple clamping arm parts through the switching part to complete the synchronous positioning control.

[0077] 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. The specific structure of the controller is not limited.

[0078] Embodiment 2: Based on the clamping arm provided in embodiment 1, this embodiment provides a further technical solution for the clamping arm.

[0079] like Figure 5 As shown, the inner support fixture includes:

[0080] The 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. A slide 7 is provided on the outside of the plurality of guide rods.

[0081] 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 provided on the outer transmission sleeve of the screw rod 8. A No. 1 motor connected to the screw rod 8 is provided on the tail plate.

[0082] Multiple friction plates 10 are arranged in a circular array around the center piece 3. A No. 1 arm and a No. 2 arm are respectively hinged between each friction plate 10 and the center piece 3 on both sides. The No. 1 arm and the No. 2 arm are spaced apart. The No. 1 arm and the No. 2 arm are used to guide and limit the movement of the friction plate 10. A transmission arm 11 is hinged on both sides of each friction plate 10, and the tail end of the transmission arm 11 is hinged to the slide 7. The transmission arm 11 is located between the No. 1 arm and the No. 2 arm, and the movement of the friction plate 10 is controlled by the transmission arm 11.

[0083] It is worth noting that when the welding device is connected to the cast iron pipe body 1: the center piece 3 is pushed into the cast iron pipe body 1 through the inner support clamp, and then the No. 1 motor is started, and the screw nut 9 and the slide 7 are driven to move via the screw 8. The transmission arm 11 is moved in conjunction with the slide 7 to push the multiple friction plates 10 to move synchronously and make friction contact with the inner wall of the cast iron pipe body 1. Since the friction plates 10 are restricted by the No. 1 arm and the No. 2 arm, the multiple friction plates 10 can move stably and can be freely expanded to complete the welding work on the cast iron pipe bodies 1 of different sizes, which enriches the construction environment, reduces the floor space, and is flexible to operate.

[0084] like Figure 11 As shown, in the embodiment of the present invention, each clamping arm member includes:

[0085] A lifting frame 12 is provided at the front end of the telescopic arm 5 through a bracket. A lifting screw 13 is rotatably provided in the lifting frame 12. A lifting screw nut 14 is slidably engaged in the lifting frame 12. A transmission sleeve of the lifting screw nut 14 is provided on the outside of the lifting screw 13.

[0086] Two lifting arms 15 are symmetrically arranged on both sides of the lifting screw nut 14. An outer wall clamping plate 16 is commonly provided on the top 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 provided 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;

[0087] The first bevel gear 18 is rotatably arranged at the bottom of the lifting frame 12 and is transmission-connected to the lifting screw 13;

[0088] It is worth noting that: when the flange body 2 is preliminarily positioned: by providing a plurality of clamping arm members, the flange body 2 is first sleeved on the center member 3 and forms a preliminary connection with the plurality of outer wall clamping plates 16. Under normal circumstances, the switching member controls the friction contact between the No. 1 friction ring 50 and the No. 2 friction ring 4 to complete the power connection. At this time, under the transmission of the driving unit, the No. 2 friction ring 4 and the No. 2 bevel gear 32 are synchronously rotated, and the No. 1 bevel gears 18 are driven to rotate synchronously by the No. 2 bevel gear 32. When the lifting screw 13 rotates, the lifting screw nut 14 is linked to move up and down in the lifting frame 12, and the two lifting arms 15 and the outer wall clamping plates 16 are linked to perform synchronous lifting and adjustment, so that the outer wall clamping plates 16 are clamped and fixed to the outer wall of the flange body 2. At the same time, the side wall of the flange body 2 is tightly attached to the calibration plate and calibration arm 17 of the outer wall clamping plates 16, which is conducive to subsequent alignment control.

[0089] In the embodiment of the present invention, each reinforcement member includes:

[0090] A moving frame 19 is provided on the inner wall of the lifting frame 12. A slider 20 is slidably provided in the moving frame 19. A telescopic rod 21 is fixedly provided on the top of the slider 20. The telescopic rod 21 slides 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 adjustment arm is slidably sleeved in the telescopic sleeve. A plurality of positioning holes are evenly provided on the side wall of the adjustment arm. A positioning bolt is provided on 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.

[0091] 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;

[0092] like Figure 9 and Figure 10 As shown, each inner wall panel comprises:

[0093] The plywood seat 22 is provided at the top of the telescopic rod 21. The plywood seat 22 is located on one side below the outer wall plywood 16. A sliding area is provided in the plywood seat 22. An inner wall plywood 23 is slidably engaged in the sliding area. A track for restricting the inner wall plywood 23 is provided on the sliding area. The plywood seat 22 is staggered with the outer wall plywood 16. The inner wall plywood 23 slides out of the plywood seat 22 and extends to the bottom of the flange body 2.

[0094] The propulsion chamber 24 is provided on one side of the sliding area. A propulsion rod 25 connected to the inner wall splint 23 is provided in the propulsion chamber 24 in a sliding and sealing manner. The propulsion rod 25 is composed of a piston plate and a piston rod. The piston plate is slidably provided in the propulsion chamber 24. The piston rod is integrally provided on the piston plate and is detachably fixedly connected to the inner wall splint 23. A No. 1 tube is provided at the tail end of the propulsion chamber 24, and a No. 1 spring for resetting is provided between the propulsion chamber 24 and the propulsion rod 25.

[0095] like Figure 7 and Figure 8 As shown, in the embodiment of the present invention, each triggering member includes:

[0096] The extrusion plate 26 is slidably mounted on the telescopic arm 5. A second spring 27 is provided between the extrusion plate 26 and the center piece 3. The second spring 27 is mounted on the outside of the telescopic arm 5. The elastic strength of the second spring 27 can be freely replaced according to the construction environment.

[0097] A plurality of extrusion arms 28 are hinged around the extrusion plate 26 in a circular array, and the front ends of the plurality of extrusion arms 28 are respectively hinged to the sliders 20 of the plurality of reinforcement members;

[0098] 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 is fixed to the cast iron pipe body 1 by the internal 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 are moved 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 clamp 16, the internal and external synchronous clamping and fixation 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 No. 2 spring 27, so that the inner wall panel 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 of 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 of the calibration arm 17 with the port of the cast iron pipe body 1, avoiding 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, and the flange body 2 can be quickly and accurately moved to the welding position without repeated adjustment, which reduces the difficulty of debugging, is conducive to the efficient and stable progress of welding work, and reduces the difficulty of operation for construction personnel.

[0099] Embodiment 3: Based on the welding mechanism provided in embodiment 1, this embodiment provides a further technical solution of the welding mechanism.

[0100] like Figure 12 and Figure 13 As shown, the drive unit includes:

[0101] A center platform 29 is concentrically arranged at the front end of the telescopic arm 5, and a driving sleeve 30 is rotatably sleeved on the outside of the center platform 29;

[0102] The installation area is provided in the center platform 29, and a second motor 31 is installed in the installation area and is connected to the drive sleeve 30;

[0103] The second bevel gear 32 is rotatably mounted on the outside of the center platform 29 and meshes with the first bevel gear 18 of the multiple clamping arms. The second bevel gear 32 is spaced apart from the drive sleeve 30, and an annular slideway is provided on the center platform 29 to cooperate with the second bevel gear 32.

[0104] In an embodiment of the present invention, the welding unit includes:

[0105] The annular track 33 is provided on the plurality of lifting frames 12 and is concentric with the center member 3. A transmission ring member 34 is provided on the outside of the annular track 33 and is in transmission connection with the drive sleeve 30.

[0106] A manual module 35 is mounted on the transmission ring 34. An L-shaped arm 36 is provided at the output end of the manual module 35. An adjustment area is defined at the top of the L-shaped arm 36. A welding arm 37 is slidably engaged within the adjustment area. An adjustment screw 38 is threadedly threaded 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.

[0107] The welding part 39 is detachably provided 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.

[0108] The fine-tuning screw 40 is threadedly screwed onto the welding arm 37. A squeezing wheel 41 is provided at the front end of the fine-tuning screw 40 through a bracket. The squeezing wheel 41 contacts the flange body 2 to limit the squeezing. The fine-tuning screw 40 is rotatably connected to the squeezing wheel 41. A limiting rod is installed on one side of the back of the squeezing wheel 41. The limiting rod slides through the welding arm 37.

[0109] 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 part 39, and then rotate the fine-tuning screw 40 to push the extrusion wheel 41 to move and contact the flange body 2, and then transmit the welding part 39 to complete the circumferential rotation welding process through the driving sleeve 30. The design of the extrusion wheel 41 enables the flange body 2 to be continuously extruded by the extrusion wheel 41 on the circumferential welding path, thereby ensuring the stability of the flange body 2 and the stability of the welding position of the welding part 39, improving the welding quality, and facilitating the operation of the construction personnel. The welding mechanism is based on the design of the internal support clamp, multiple clamping arm members and multiple reinforcement members, and can perform stable self-positioning operation 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;

[0110] like Figure 14 and Figure 15 As shown, in an embodiment of the present invention, the switching element includes:

[0111] The annular cavity 42 is fixedly sleeved on the outside of the driving sleeve 30, and 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 No. 1 cavity 45 and a No. 2 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 cavity 42. A No. 3 spring 48 is sleeved on the outside of the plurality of control rods 47. The plurality of No. 3 springs 48 are located in the No. 1 cavity 45. A plurality of No. 2 pipes 49 communicating with the No. 2 cavity 46 are arranged around the sealing ring 43. The plurality of No. 2 pipes 49 are respectively communicated with the No. 1 pipe through pipelines. A plurality of stop blocks are provided in the No. 2 cavity 46 of the annular cavity 42. The active limitation of the extreme position of the extrusion ring 44 is completed by the plurality of stop blocks. A medium is injected into the No. 2 cavity 46 of the annular cavity 42, and the medium is specifically oil.

[0112] A first friction ring 50 is slidably disposed outside the drive sleeve 30 and fixedly connected to the front ends of the plurality of control rods 47;

[0113] The second friction ring 4 is provided on the back of the second bevel gear 32. The transmission connection is completed by the friction contact between the first friction ring 50 and the second friction ring 4. The third spring 48 pushes the first friction ring 50 and the second friction ring 4 into friction contact. The contact surfaces of the first friction ring 50 and the second friction ring 4 are both made of high-friction material, which can achieve stable transmission.

[0114] It is worth noting that: when controlling the switching member: by providing a switching member, under normal circumstances, the extrusion ring 44 is squeezed by multiple No. 3 springs 48, so that the medium in the No. 2 cavity 46 is squeezed into multiple propulsion chambers 24 for temporary storage. At this time, the No. 1 friction plate 10 is in friction transmission contact with the No. 2 friction plate 10, so it is only necessary to start the No. 2 motor 31 to control the drive sleeve 30 to rotate on the center table 29, and the power is transmitted to the No. 2 bevel gear 32 through the friction of the No. 1 friction plate 10 and the No. 2 friction plate 10, completing the meshing transmission control of multiple No. 1 bevel gears 18. When the flange body 2 is moved toward the welding position of the cast iron pipe body 1, since the inner wall plate corresponds to the port of the cast iron pipe body 1, the flange body 2 moves On the path to the welding position, the inner wall splint 23 first contacts the end of the cast iron pipe body 1, and then is driven by the pulling force of the hydraulic cylinder 6, so that the inner wall splint 23 moves in the splint 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 splint 23 moves in the splint seat 22, the propulsion rod 25 moves in the propulsion chamber 24, and the medium in the propulsion chamber 24 is transported to the No. 2 cavity 46 of the annular cavity 42 through the No. 1 pipe and the No. 2 pipe 49, thereby pushing the extrusion ring 44 to overcome multiple No. 3 springs 48 to move in the annular cavity 42, and pulling the No. 1 friction ring 50 and the No. 2 friction ring 4 apart through multiple control rods 47 to complete the power interruption, which is conducive to the subsequent welding work.

[0115] Example 4: A welding method for processing a hollow cast iron pipe, the welding method specifically comprising the following steps:

[0116] 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;

[0117] Step 2: Then push one end of the center piece 3 of the welding device into the cast iron pipe body 1, and control the inner support clamp to complete the connection and fixation with the cast iron pipe body 1;

[0118] Step 3: The hydraulic cylinder 6 controls the telescopic arm 5, the multiple clamping arm members, and the flange body 2 to advance toward the side of the cast iron pipe body 1 to the predetermined welding position. During this path, the trigger member first controls the multiple reinforcement members to move synchronously to complete the clamping and positioning of the inner wall of the flange body 2.

[0119] Step 4: Through the design of the reinforcement, when the flange body 2 and the cast iron pipe body 1 come into close contact, the inner wall plate moves accordingly, and the switching member is synchronously controlled to complete the movement and coordination, so that the power connection between the switching member and the multiple reinforcements is interrupted;

[0120] Step 5: Finally, the driving unit is used to control the circular rotation of the welding unit to perform rapid welding processing.

[0121] The present invention provides a welding device and method for processing hollow cast iron pipes. The specific working principle is as follows: first, the welding device is moved to the construction area, and then the flange body 2 is pre-installed on the welding device. By providing multiple clamping arm members, the power of the driving unit is connected to the multiple clamping arm members via a switching member, and the multiple clamping arm members are controlled to synchronously telescope and move to complete the initial clamping and positioning of the flange body 2. Then, one end of the center member 3 of the welding device is correspondingly pushed into the cast iron pipe body 1, and the internal support clamp is controlled to complete the connection and fixation with the cast iron pipe body 1. The concentric design of the internal support clamp and the multiple clamping arm members ensures the concentricity consistency of the cast iron pipe body 1 and the flange body 2, which is beneficial to subsequent alignment, reduces the difficulty of debugging, and improves the welding quality.

[0122] By providing a hydraulic cylinder 6, the telescopic arm 5 and multiple clamping arm members and the flange body 2 are fed toward the side of the cast iron pipe body 1 to the predetermined welding position. In this path, the trigger member first controls the multiple reinforcement members to move synchronously 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 stability of the flange body 2. With the design of the reinforcement member, when the flange body 2 and the cast iron pipe body 1 are close to each other, the inner wall plate actively completes 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 is in motion, the switching member is synchronously controlled to complete the movement and coordination, so that the power connection between the switching member and the multiple reinforcement members is interrupted. After that, the driving unit controls the circumferential rotation of the welding unit to perform rapid welding processing;

[0123] The welding device can be freely assembled on cast iron pipe bodies 1 of different sizes to complete welding work, is not restricted by the working environment, and can complete the welding process by only quickly assembling on the cast iron pipe body 1. It can automatically complete the positioning work, occupies a small area, and is flexible to assemble. At the same time, relying on the cooperation of multiple clamping arms and reinforcement parts, the flange body 2 can be stably pushed onto the cast iron pipe body 1, ensuring the concentricity of the flange body 2 and the cast iron pipe body 1, reducing the difficulty of subsequent debugging, and improving the alignment efficiency. The driving unit can complete the switching control of multiple clamping arms and welding units, 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, optimize the welding process, and reduce the welding difficulty of the cast iron pipe body 1.

[0124] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0125] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A welding device for processing hollow cast iron pipes, comprising a cast iron pipe body (1) and a flange body (2) mounted on the end 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), and an inner support clamp is provided at the tail end of the center piece (3) to be 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) is installed on one side of the moving area and is connected to the telescopic arm (5); 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 reinforcement member for positioning and limiting the inner wall of the flange body (2) is provided on the inner side of each of the plurality of clamping arm members; the plurality of clamping arm members and the reinforcement 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 reinforcement members is slidably sleeved on the telescopic arm (5); A welding mechanism is provided at the front end of the telescopic arm (5), and 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; A switching member is provided on the driving unit to complete the switching transmission of power. The switching member is provided in conjunction with the reinforcement member. The switching member is contacted with the end 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. 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), and 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), and 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 (13); Each reinforcement includes: A movable frame (19) is arranged on the inner wall of the lifting frame (12), a slider (20) is slidably arranged in the movable 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 movable frame (19); An 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); Each interior wall panel includes: A splint seat (22) is provided on the top of the telescopic rod (21), the splint seat (22) is located on one side below the outer wall splint (16), a sliding area is provided in the splint seat (22), and an inner wall splint (23) is provided in the sliding area for sliding engagement; A propulsion chamber (24) is provided on 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) for sliding sealing, and a No. 1 pipe is provided at the tail of the propulsion chamber (24); 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 member (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 extrusion plate (26) in a circular array, and the front ends of the plurality of extrusion arms (28) are respectively hingedly connected to the plurality of reinforcement members; The drive unit includes: A center platform (29) is concentrically arranged at the front end of the telescopic arm (5), and a drive sleeve (30) is rotatably sleeved on the outside of the center platform (29); An installation area is provided in the center platform (29), and a second motor (31) is installed in the installation area and is connected to the drive sleeve (30); A second bevel gear (32) is rotatably sleeved on the outside of the center platform (29) and is transmission-connected to a plurality of clamping arm members; 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 No. 1 cavity (45) and a No. 2 cavity (46), a plurality of control rods (47) are provided in a circular array on the extrusion ring (44), both ends of the plurality of control rods (47) are provided through the annular cavity (42), a No. 3 spring (48) is sleeved on the outside of the plurality of control rods (47), and the plurality of No. 3 springs (48) are located in the No. 1 cavity (45), a plurality of No. 2 pipes (49) are provided around the sealing ring (43) and communicate with the No. 2 cavity (46), and the plurality of No. 2 pipes (49) are communicated with the reinforcement member through pipelines; A first friction ring (50) is slidably disposed outside the drive 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), and the transmission connection is completed through the friction contact between the first friction ring (50) and the second friction ring (4).

2. A welding device for processing hollow cast iron pipes according to claim 1, characterized in that: The internal 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 (7) is provided on the outside of the plurality of guide rods for sliding together; A screw rod (8) is rotatably arranged between the tail plate and the center piece (3), and a screw rod nut (9) fixedly connected to the slide (7) is provided on the outer transmission sleeve of the screw rod (8); A plurality of friction plates (10) are arranged in a circular array around the central member (3), and a No. 1 arm and a No. 2 arm are respectively hinged between the two sides of each friction plate (10) and the central member (3). 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).

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

4. A welding method for processing a hollow cast iron pipe, using a welding device for processing a hollow cast iron pipe according to any one of claims 1 to 3, 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) by means of the hydraulic cylinder (6) to advance toward one side of the cast iron pipe body (1) to a predetermined welding position. During this path, the trigger member first controls the plurality of reinforcing 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) come into close contact, the inner wall plate follows the movement, 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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