Online repairing and welding device for valve seat of gate valve

Abstract

The invention belongs to the technical field of welding, and particularly relates to an online repair welding device for a gate valve seat. Comprising a mechanical body, an adapter, a welding power source, an upper computer, an argon bottle and a pipeline, the mechanical body is connected with the welding power source through the pipeline, the welding power source is connected with the upper computer and the argon bottle through the pipeline, and the mechanical body is installed on a valve through the adapter. The invention has the following beneficial effects: light weight design is adopted, so that carrying is convenient; welding operation can be remotely controlled; the structure is compact, and welding operation in narrow space in the valve can be met; welding of valve seats of different models and different diameters can be adapted by replacing the adapter; the states of welding wires, tungsten electrodes and molten pools can be remotely observed, and the welding quality is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of welding, and in particular relates to an online repair welding device for a gate valve seat. Background Art

[0002] As a key equipment in nuclear power plants, valves control the medium transportation in nuclear power plants and are an important guarantee for the safe operation of nuclear power plants. Valve seat online repair is an online automatic repair operation for the valve seat of nuclear power plant welded valves after damage occurs, so that the repaired valve is close to or reaches the performance index of the new valve, extending the service life of the valve and reducing the workload of valve replacement and maintenance.

[0003] During the online repair process of the gate valve, the valve seat needs to be welded. Since the welding site is radioactive, operators should not enter for a long time to install and operate the equipment. During the welding process, the status of the welding wire, tungsten electrode and molten pool needs to be observed to ensure the welding quality.

[0004] Therefore, it is necessary to provide an online welding device for gate valve seat which is convenient to carry, quick to install, compact in structure, can remotely control welding operation, and can be remotely monitored to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide an online repair welding device for a gate valve seat, which can meet the requirements of convenient on-site transportation, rapid installation, compact structure to adapt to the narrow space inside the valve, and remote control and observation of the status of the welding wire, tungsten electrode and molten pool.

[0006] The technical solution of the present invention is as follows: an online repair welding device for a gate valve seat, comprising a mechanical body, an adapter, a welding power supply, a host computer, an argon gas cylinder and a pipeline, wherein the mechanical body is connected to the welding power supply via a pipeline, the welding power supply is connected to the host computer and the argon gas cylinder via a pipeline, and the mechanical body is installed on the valve via an adapter.

[0007] The mechanical body includes a feed assembly, a connecting arm assembly, a rotary transmission device, a rotary assembly and a welding front end. The connecting arm assembly is fixed on the feed assembly, the rotary transmission device is installed on the connecting arm assembly, the rotary assembly is installed on the rotary transmission device, and the welding front end is fixed on the rotary assembly.

[0008] The feeding assembly comprises a lifting module, a connecting frame and an axial module, and the lifting module and the axial module are connected via the connecting frame.

[0009] The connecting arm assembly comprises a connecting arm, a cable recovery assembly, a wire reel, a wire feeder, a cable guide frame and a copper connecting plate, and the cable recovery assembly, the wire reel, the wire feeder, the cable guide frame and the copper connecting plate are fixed on the connecting arm.

[0010] The rotary transmission device includes a driving motor, a chain, a driving sprocket, a driven sprocket and an idler assembly. The driving motor is installed on the upper part of the connecting arm assembly, the driving sprocket is installed on the front end of the driving motor, the driven sprocket is installed on the lower part of the connecting arm assembly, the chain is installed on the driving sprocket and the driven sprocket, and the idler assembly is fixed in the middle part of the connecting arm assembly for tensioning the chain.

[0011] The rotary assembly comprises a rotary disc, a winding disc, a cable clamp, a first insulating plate and a second insulating plate. The rotary disc is mounted on a rotary transmission device; the winding disc, the cable clamp, the first insulating plate and the second insulating plate are mounted on the rotary disc.

[0012] The welding front end includes an axial feed unit, a radial feed unit, and a welding gun camera unit. The axial feed unit is installed on a rotary disk. The axial feed unit includes an axial motor, an axial housing, an axial transmission unit, and an axial connecting plate. The axial connecting plate is fixed on the axial transmission unit and can follow the axial transmission unit to move axially along the valve. The radial feed unit is installed on the axial connecting plate of the axial feed unit; the radial feed unit includes a radial motor, a radial transmission unit, and a radial housing. The radial transmission unit can move radially along the valve. The welding gun camera assembly is installed on the radial transmission unit. The welding gun camera assembly includes an insulating frame, a welding gun, a wire guide rod, a camera unit and a camera connecting plate. The insulating frame is connected to the radial transmission unit. The welding gun, the wire guide rod, and the camera connecting plate are installed on the insulating frame. The camera unit is fixed on the insulating frame.

[0013] The adapter is mounted on the flange of the valve.

[0014] The host computer remotely controls the device and monitors the welding process in real time.

[0015] The welding power source provides power, circulating water cooling, shielding gas transmission and data signal transmission for the device.

[0016] The beneficial effects of the present invention are as follows: the present invention adopts a lightweight design, which is convenient for carrying; the welding operation can be controlled remotely; the structure is compact, which can meet the welding operation in the narrow space inside the valve; by replacing the adapter, it can adapt to the welding of valve seats of different models and diameters; the status of the welding wire, tungsten electrode and molten pool can be observed remotely to ensure the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of an online repair welding device for a gate valve seat provided by the present invention; Figure 2 It is a schematic diagram of the rotary component structure; Figure 3 for Figure 2A partial enlarged view of the middle part; Figure 4 for Figure 2 A partial enlarged view of point B in the middle.

[0018] In the figure: 1 feed assembly, 2 connecting arm assembly, 3 rotary transmission device, 4 adapter, 5 rotary assembly, 6 welding front end, 7 gate valve, 8 welding power supply, 9 argon cylinder, 10 host computer, 11 pipeline, 101 lifting module, 102 connecting frame, 103 axial module, 21 connecting arm, 22 cable recovery assembly, 23 wire reel, 24 wire feeder, 25 cable guide frame, 26 copper connecting plate, 31 drive motor, 32 chain, 33 driving sprocket, 34 driven sprocket, 35 idler wheel assembly Parts, 51 turntable, 52 winding disk, 53 cable clamp, 54 first insulating plate, 55 second insulating plate, 61 axial feed unit, 611 axial motor, 612 axial housing, 613 axial transmission unit, 614 axial connecting plate, 62 radial feed unit, 621 radial motor, 622 radial transmission unit, 623 radial housing, 63 welding gun camera unit, 631 insulating frame, 632 welding gun, 633 guide wire rod, 634 camera unit, 635 camera connecting plate. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] The present invention provides an online repair welding device for a gate valve seat, comprising a mechanical body, an adapter 4, a welding power source 8, a host computer 10, an argon gas cylinder 9 and a pipeline 11. The mechanical body is connected to the welding power source 8 through the pipeline 11, and the welding power source 8 is connected to the host computer 10 and the argon gas cylinder 9 through the pipeline 11. The mechanical body is installed on the gate valve 7 through the adapter 4. A person remotely controls the mechanical body through the host computer 10, the welding power source 8 and the argon gas cylinder 9 to complete the welding operation, thereby reducing the radiation dose to the person.

[0021] The mechanical body includes a feeding assembly 1, a connecting arm assembly 2, a rotary transmission device 3, a rotary assembly 5 and a welding front end 6. The connecting arm assembly 2 is fixed to the feeding assembly 1; the rotary transmission device 3 is installed on the connecting arm assembly 2; the rotary assembly 5 is installed on the rotary transmission device 3; and the welding front end 6 is fixed to the rotary assembly 5.

[0022] The feed assembly 1 is used to realize the vertical lifting movement of the welding front end 6 and the axial movement along the valve axis. The connecting arm assembly 2 is the device main body connecting structure, which is used to connect other components; the rotary transmission device 3 is used to realize the rotary movement of the rotary assembly 5 and the welding front end 6; the rotary assembly 5 is used for the retraction and release of the cable; the welding front end 6 is used to complete the welding operation and observe the welding wire, tungsten electrode and molten pool.

[0023] The feeding assembly 1 includes a lifting module 101, a connecting frame 102 and an axial module 103. The lifting module 101 and the axial module 103 are connected via the connecting frame 102.

[0024] The connecting arm assembly 2 includes a connecting arm 21, a cable recovery assembly 22, a wire reel 23, a wire feeder 24, a cable guide frame 25 and a copper connecting plate 26. The cable recovery assembly 22, the wire reel 23, the wire feeder 24, the cable guide frame 25 and the copper connecting plate 26 are fixed on the connecting arm 21.

[0025] The rotary transmission device 3 is composed of a driving motor 31, a chain 32, a driving sprocket 33, a driven sprocket 34 and an idler assembly 35. The driving motor 31 is mounted on the upper part of the connecting arm assembly 2; the driving sprocket 33 is mounted on the front end of the driving motor 31; the driven sprocket 34 is mounted on the lower part of the connecting arm assembly 2; the chain 32 is mounted on the driving sprocket 33 and the driven sprocket 34; the idler assembly 35 is fixed in the middle of the connecting arm assembly 2 and is used for tensioning the chain 32.

[0026] The rotating assembly 5 includes a rotating disk 51, a winding disk 52, a cable clamp 53, a first insulating plate 54, and a second insulating plate 55. The rotating disk 51 is installed on the rotating transmission device 3, and the winding disk 52, the cable clamp 53, the first insulating plate 54, and the second insulating plate 55 are installed on the rotating disk 51.

[0027] The welding front end 6 is composed of an axial feeding unit 61, a radial feeding unit 62, and a welding gun camera unit 63. The axial feeding unit 61 is installed on the rotary disk 51; the axial feeding unit 61 is composed of an axial motor 611, an axial housing 612, an axial transmission unit 613, and an axial connecting plate 614; the axial connecting plate 614 is fixed on the axial transmission unit 61 and can move axially along the gate valve 7 with the axial transmission unit 61. The radial feeding unit 62 is installed on the axial connecting plate 614 of the axial feeding unit 61; the radial feeding unit 62 is composed of a radial motor 621, a radial transmission unit 622, and a radial housing 623; the radial transmission unit 622 can move radially along the gate valve 7. The welding gun camera assembly 63 is installed on the radial transmission unit 622; the welding gun camera assembly 63 is composed of an insulating frame 631, a welding gun 632, a wire guide rod 633, a camera unit 634 and a camera connecting plate 635; the insulating frame 631 is connected to the radial transmission unit 622; the welding gun 632, the wire guide rod 633, and the camera connecting plate 635 are installed on the insulating frame 631; the camera unit 634 is fixed on the insulating frame 631.

[0028] Specifically, the welding front end 6 has a compact structure and occupies a small space, thus meeting the welding needs in a small space.

[0029] Specifically, the adapter 4 is installed on the flange of the gate valve 7 and has different specifications according to the different installation interfaces of the valve to be repaired, so as to meet the fixing requirements of the equipment on different valves.

[0030] The host computer 10 remotely controls the device and monitors the welding process in real time.

[0031] The welding power source 8 provides power, circulating water cooling, shielding gas transmission and data signal transmission for the device.

[0032] The argon gas cylinder 9 provides protective gas for the device.

[0033] The pipeline 11 provides the device with voltage, current, control signal, video signal, cooling water and protective gas required for welding.

[0034] The specific working process of the present invention is as follows: After the adapter 4 is connected to the gate valve 7, the machine body is installed on the adapter 4, and the upper computer 10 remotely controls the feed assembly 1 to lower the welding gun 632 to the welding height; then the axial feed assembly 61 and the radial feed assembly 62 are adjusted to move the welding gun 632 to the valve seat welding position, and the equipment is controlled to start arc welding. During the welding process, automatic arc voltage control is achieved by controlling the axial motor 611 and the radial motor 621 to ensure welding quality.

[0035] When the present invention is in use, the feed assembly 1 is used to achieve preliminary axial and height positioning of the welding gun 632, the rotary transmission device 3 is used to achieve circumferential rotation of the welding gun 632 along the welding position of the gate valve 7, the axial feed unit 61 is used to achieve axial movement of the welding gun 632 along the gate valve 7, and the radial feed unit 62 is used to achieve radial movement of the welding gun 632 along the gate valve 7. The five degrees of freedom can meet the needs of full-circle welding of the valve seat of the gate valve 7; through the remote control camera unit 634, the status of the welding wire, tungsten electrode and molten pool can be remotely monitored.

[0036] The present invention has five degrees of freedom, which can meet the needs of online welding operations in a narrow space inside a valve; the welding operation can be remotely controlled; it is radiation-resistant; it can adapt to narrow spaces; it improves welding efficiency and ensures welding quality; it has the function of remotely monitoring the status of welding wire, tungsten electrode and molten pool; it avoids personnel intervention in a high-radiation environment and protects personnel safety.

[0037] The above-mentioned specific implementation methods are only used to explain the design concept of the present invention, and their role is to facilitate the understanding and implementation of technical personnel in related fields, rather than limiting the scope of protection of the present invention. Therefore, equivalent changes made using the design concept of the present invention still fall within the scope of protection of the present invention.

Claims

1. A gate valve seat online repair welding device, characterized in that: It includes a mechanical body, an adapter, a welding power source, a host computer, an argon gas cylinder and a pipeline. The mechanical body is connected to the welding power source through the pipeline, the welding power source is connected to the host computer and the argon gas cylinder through the pipeline, and the mechanical body is installed on the valve through the adapter.

2. The gate valve seat online repair welding device according to claim 1, characterized in that: The mechanical body includes a feed assembly, a connecting arm assembly, a rotary transmission device, a rotary assembly and a welding front end. The connecting arm assembly is fixed on the feed assembly, the rotary transmission device is installed on the connecting arm assembly, the rotary assembly is installed on the rotary transmission device, and the welding front end is fixed on the rotary assembly.

3. The gate valve seat online repair welding device according to claim 2, characterized in that: The feeding assembly comprises a lifting module, a connecting frame and an axial module, and the lifting module and the axial module are connected via the connecting frame.

4. The gate valve seat online repair welding device according to claim 2, characterized in that: The connecting arm assembly comprises a connecting arm, a cable recovery assembly, a wire reel, a wire feeder, a cable guide frame and a copper connecting plate, and the cable recovery assembly, the wire reel, the wire feeder, the cable guide frame and the copper connecting plate are fixed on the connecting arm.

5. The gate valve seat online repair welding device according to claim 2, characterized in that: The rotary transmission device includes a driving motor, a chain, a driving sprocket, a driven sprocket and an idler assembly. The driving motor is installed on the upper part of the connecting arm assembly, the driving sprocket is installed on the front end of the driving motor, the driven sprocket is installed on the lower part of the connecting arm assembly, the chain is installed on the driving sprocket and the driven sprocket, and the idler assembly is fixed in the middle part of the connecting arm assembly for tensioning the chain.

6. The gate valve seat online repair welding device according to claim 2, characterized in that: The rotary assembly comprises a rotary disc, a winding disc, a cable clamp, a first insulating plate and a second insulating plate. The rotary disc is mounted on a rotary transmission device; the winding disc, the cable clamp, the first insulating plate and the second insulating plate are mounted on the rotary disc.

7. The gate valve seat online repair welding device according to claim 2, characterized in that: The welding front end includes an axial feed unit, a radial feed unit, and a welding gun camera unit. The axial feed unit is installed on a rotary disk. The axial feed unit includes an axial motor, an axial housing, an axial transmission unit, and an axial connecting plate. The axial connecting plate is fixed on the axial transmission unit and can follow the axial transmission unit to move axially along the valve. The radial feed unit is installed on the axial connecting plate of the axial feed unit; the radial feed unit includes a radial motor, a radial transmission unit, and a radial housing. The radial transmission unit can move radially along the valve. The welding gun camera assembly is installed on the radial transmission unit. The welding gun camera assembly includes an insulating frame, a welding gun, a wire guide rod, a camera unit and a camera connecting plate. The insulating frame is connected to the radial transmission unit. The welding gun, the wire guide rod, and the camera connecting plate are installed on the insulating frame. The camera unit is fixed on the insulating frame.

8. The gate valve seat online repair welding device according to claim 1, characterized in that: The adapter is mounted on the flange of the valve.

9. The gate valve seat online repair welding device according to claim 1, characterized in that: The host computer remotely controls the device and monitors the welding process in real time.

10. The gate valve seat online repair welding device according to claim 1, characterized in that: The welding power source provides power, circulating water cooling, shielding gas transmission and data signal transmission for the device.

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