Online welding device for valve seat of horizontal valve

Abstract

The invention belongs to the technical field of online welding of valves, and particularly relates to an online welding device for a valve seat of a horizontal valve. Comprising a mechanical body, an adapter, a welding power source, an upper computer, a gas cylinder 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 gas cylinder through the pipeline, the mechanical body is installed on a valve through the adapter, and the mechanical body is remotely controlled through the upper computer, the welding power source and the gas cylinder. 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 present invention belongs to the technical field of on-line welding of valves, and particularly relates to an on-line welding device for the valve seat of a horizontal valve. Background Art

[0002] As a key device in a nuclear power plant, a valve controls the medium transportation in the nuclear power plant and is an important guarantee for the safe operation of the nuclear power plant. On-line repair of the valve seat is an on-line automatic repair operation for the valve seat of a welded valve in a nuclear power plant after damage, so that the repaired valve is close to or reaches the performance index of a new valve, extends the service life of the valve, and reduces the replacement and maintenance workload of the valve.

[0003] During the on-line repair process of a horizontal valve, welding of the valve seat is required. Since the welding site is radioactive, it is not suitable for operators to enter and operate the equipment for a long time; and during the welding process, it is necessary to observe the states of the welding wire, tungsten electrode and molten pool to ensure the welding quality.

[0004] Therefore, it is necessary to provide an on-line welding device for the valve seat of a horizontal valve that is convenient to carry, quickly installed, compact in structure, can remotely control the welding operation, and remotely monitor, so as to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an on-line welding device for the valve seat of a horizontal valve, which can meet the requirements of being convenient to carry on site, quickly installed, compact in structure to adapt to the narrow space inside the valve, and can remotely control and observe the states of the welding wire, tungsten electrode and molten pool.

[0006] The technical solution of the present invention is as follows: An on-line welding device for the valve seat of a horizontal valve includes a mechanical body, an adapter, a welding power source, a host computer, a gas cylinder and pipelines. The mechanical body is connected to the welding power source through pipelines, and the welding power source is connected to the host computer and the gas cylinder through pipelines. The mechanical body is installed on the valve through the adapter, and the mechanical body is remotely controlled through the host computer, the welding power source and the gas cylinder.

[0007] The mechanical body includes a lifting component, a slewing component, a horizontal adjustment component, a welding front end, a wire feeding component and a wire reel component. The slewing component is fixed on the lifting module of the lifting component; the horizontal adjustment component is fixed on the rotating platform in the slewing component; the welding front end is fixed on the welding torch mounting plate of the horizontal adjustment component, the wire reel component is fixed on the lifting component, and the wire feeding component is fixed on the slewing component.

[0008] The lifting assembly is used to achieve the vertical movement of the welding front end along the axial direction of the valve seat, the rotary assembly is used to achieve the circumferential movement of the welding front end along the axis of the valve seat, the horizontal adjustment assembly is used to adjust the welding radius, the wire feeding assembly and the wire spool assembly are used to provide the welding wire required for welding, and the welding front end is used to complete the welding operation and observe the welding wire, tungsten electrode and molten pool.

[0009] The lifting assembly includes a lifting module, a lifting motor and a base. The lifting module is fixed on the base, and the lifting motor is installed at the driving end of the lifting module.

[0010] The rotary assembly includes a fixed seat, a rotating platform and a rotary motor. The fixed seat is installed on the lifting module; the rotating platform is fixed on the fixed seat, and the rotary motor is installed at the driving end of the rotating platform.

[0011] The horizontal adjustment assembly includes a swivel seat, a connecting plate, a horizontal module, a horizontal motor and a welding torch mounting plate. The swivel seat is installed on the rotating platform; the connecting plate is fixed on the swivel seat; the horizontal module is fixed on the connecting plate; the welding torch mounting plate is fixed on the horizontal module; the horizontal motor is installed at the driving end of the horizontal module.

[0012] The welding front end includes a clamping block, a welding torch and a camera assembly. The clamping block is installed on the welding torch mounting plate; the welding torch is fixed on the clamping block; the camera assembly is fixed on the welding torch.

[0013] The wire feeding assembly includes a wire feeder, a wire feeding hose and a guide wire rod. The wire feeder is fixed on the rotating platform, the guide wire rod is fixed on the welding torch, and the wire feeding hose connects the wire spool, the wire feeder and the guide wire rod.

[0014] The guide wire rod has an arc-shaped structure, occupies a small space, and can meet the welding needs of small spaces.

[0015] The adapter is installed on the flange of the valve and has different specifications according to the different installation interfaces of the valves to be repaired, and can meet the fixing requirements of the equipment on different valves.

[0016] The beneficial effects of the present invention are as follows: adopting a lightweight design, convenient for handling; capable of remotely controlling welding operations; having a compact structure and can meet the welding operations in the narrow space inside the valve; can adapt to the welding of valve seats of different models and different diameters by replacing the adapter; can remotely observe the states of the welding wire, tungsten electrode and molten pool to ensure the welding quality. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of an on-line welding device for a horizontal valve seat provided by the present invention;

[0018] Figure 2It is a schematic structural diagram of the horizontal adjustment component;

[0019] Figure 3 It is a schematic diagram of the welding working condition applying the present invention.

[0020] In the figure: 1 host computer, 2 welding power source, 3 gas cylinder, 4 pipeline, 5 mechanical body, 6 adapter, 7 valve, 51 lifting component, 52 slewing component, 53 horizontal adjustment component, 54 welding front end, 55 wire feeding component, 56 wire reel component, 511 lifting motor, 512 base, 513 lifting module, 521 slewing motor, 522 fixed seat, 523 rotating platform, 531 slewing seat, 532 mounting plate, 533 horizontal motor, 534 horizontal module, 535 welding torch mounting plate, 541 clamping block, 542 welding torch, 543 camera component, 551 wire feeding hose, 552 wire feeder, 553 guide lead screw, 61 flange, 62 fixing plate, 71 valve body, 72 valve seat. Specific embodiments

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] As Figure 1 and 2 shown, an on-line welding device for a horizontal valve seat provided by the present invention includes a mechanical body 5, an adapter 6, a welding power source 2, a host computer 1, a gas cylinder 3 and a pipeline 4. The mechanical body 5 is connected to the welding power source 2 through the pipeline 4, and the welding power source 2 is connected to the host computer 1 and the gas cylinder 3 through the pipeline 4. The mechanical body 5 is installed on the valve 7 through the adapter 6, and personnel remotely control the mechanical body 5 through the host computer 1, the welding power source 2 and the gas cylinder 3 to complete the welding operation and reduce the radiation dose received by personnel.

[0023] The mechanical body 5 includes a lifting component 51, a slewing component 52, a horizontal adjustment component 53, a welding front end 54, a wire feeding component 55 and a wire reel component 56. The slewing component 52 is fixed on the lifting module 513 of the lifting component 51; the horizontal adjustment component 53 is fixed on the rotating platform 523 in the slewing component 52; the welding front end 54 is fixed on the welding torch mounting plate 535 of the horizontal adjustment component 53, the wire reel component 56 is fixed on the lifting component 51, and the wire feeding component 55 is fixed on the slewing component 52.

[0024] The lifting component 51 is used to realize the vertical movement of the welding front end 54 along the axial direction of the valve seat, the slewing component 52 is used to realize the circumferential movement of the welding front end 54 along the axis of the valve seat, the horizontal adjustment component 53 is used to adjust the welding radius, the wire feeding component 55 and the wire reel component 56 are used to provide the welding wire required for welding, and the welding front end 54 is used to complete the welding operation and observe the welding wire, tungsten electrode and molten pool.

[0025] The lifting assembly 51 includes a lifting module 513, a lifting motor 511 and a base 512. The lifting module 513 is fixed on the base 512, and the lifting motor 511 is installed at the driving end of the lifting module 513.

[0026] The slewing assembly 52 includes a fixed seat 522, a rotating platform 523 and a slewing motor 521. The fixed seat 522 is installed on the lifting module 513; the rotating platform 523 is fixed on the fixed seat 522, and the slewing motor 521 is installed at the driving end of the rotating platform 523.

[0027] The horizontal adjustment assembly 53 includes a slewing seat 531, a connecting plate 532, a horizontal module 534, a horizontal motor 533 and a welding torch mounting plate 535. The slewing seat 531 is installed on the rotating platform 523; the connecting plate 532 is fixed on the slewing seat 531; the horizontal module 534 is fixed on the connecting plate 532; the welding torch mounting plate 535 is fixed on the horizontal module 534; the horizontal motor 533 is installed at the driving end of the horizontal module 534.

[0028] The welding front end 54 includes a clamping block 541, a welding torch 542 and a camera assembly 543. The clamping block 541 is installed on the welding torch mounting plate 535; the welding torch 542 is fixed on the clamping block 541; the camera assembly 543 is fixed on the welding torch 542.

[0029] The wire feeding assembly 55 includes a wire feeder 552, a wire feeding hose 551 and a wire guiding rod 553. The wire feeder 552 is fixed on the rotating platform 523, the wire guiding rod 553 is fixed on the welding torch 542, and the wire feeding hose 551 connects the wire reel 56, the wire feeder 552 and the wire guiding rod 553.

[0030] Specifically, the wire guiding rod 553 has an arc-shaped structure, which occupies a small space and can meet the welding needs of small spaces.

[0031] Specifically, the adapter 6 is installed on the flange of the valve 7 and has different specifications according to the different installation interfaces of the repaired valve 7, which can meet the fixing requirements of the equipment for different valves 7.

[0032] The upper computer 1 remotely controls the device and monitors the welding process in real time.

[0033] The welding power source 2 provides power for the device, including circulating water cooling, shielding gas transmission and data signal transmission.

[0034] The gas cylinder 3 provides shielding gas for the device.

[0035] The pipeline 4 provides the voltage, current, control signal, video signal, cooling water, and shielding gas required for welding of the device.

[0036] The specific working process of the present invention is as follows:

[0037] After connecting the adapter 6 to the valve 7, the mechanical body 5 is installed on the adapter 6. The lifting assembly 51 is remotely controlled by the host computer 1 to lower the welding torch 542 to the welding height; then the horizontal adjustment assembly 53 is adjusted to move the welding torch 542 to the welding position of the valve, as Figure 3 shown, and the control device is controlled to start arc welding. During the welding process, the lifting motor 511 and the horizontal motor 533 are linked to achieve automatic arc voltage control and ensure the welding quality.

[0038] When the present invention is in use, the slewing assembly 52 is used to realize the circumferential movement of the welding torch 542 along the welding position of the valve 7, the lifting assembly 51 is used to realize the axial movement of the welding torch 542 along the valve 7, and the horizontal adjustment assembly 53 is used to realize the radial movement of the welding torch 542 along the valve 7. The three degrees of freedom can meet the need for welding the entire circumferential groove of the valve 7; by remotely controlling the camera assembly 543, the states of the welding wire, tungsten electrode, and molten pool can be remotely monitored.

[0039] The above specific embodiments are only used to explain and illustrate the design concept of the present invention, and their function is to facilitate the understanding and implementation by those skilled in the relevant fields, rather than to limit the scope of the patent protection of the present invention. Therefore, equivalent changes made using the design concept of the present invention still fall within the protection scope of the present invention.

Claims

1. An online welding device for a horizontal valve seat, characterized in that: The invention comprises a mechanical body, an adapter, a welding power source, a host computer, a gas cylinder and a pipeline. The mechanical body is connected to the welding power source through the pipeline, and the welding power source is connected to the host computer and the gas cylinder through the pipeline. The mechanical body is installed on the valve through the adapter, and the mechanical body is remotely controlled through the host computer, the welding power source and the gas cylinder.

2. The horizontal valve seat online welding device according to claim 1, characterized in that: The mechanical body includes a lifting assembly, a rotating assembly, a horizontal adjustment assembly, a welding front end, a wire feeding assembly and a wire reel assembly. The rotating assembly is fixed on the lifting module of the lifting assembly; the horizontal adjustment assembly is fixed on the rotating platform in the rotating assembly; the welding front end is fixed on the welding gun mounting plate of the horizontal adjustment assembly, the wire reel assembly is fixed on the lifting assembly, and the wire feeding assembly is fixed on the rotating assembly.

3. The horizontal valve seat online welding device according to claim 2, characterized in that: The lifting assembly is used to realize the vertical movement of the welding front end along the axial direction of the valve seat, the rotating assembly is used to realize the circular movement of the welding front end along the axis of the valve seat, the horizontal adjustment assembly is used to adjust the welding radius, the wire feeding assembly and the wire reel assembly are used to provide the welding wire required for welding, and the welding front end is used to complete the welding operation and observe the welding wire, tungsten electrode and molten pool.

4. The horizontal valve seat online welding device according to claim 2, characterized in that: The lifting assembly comprises a lifting module, a lifting motor and a base, the lifting module is fixed on the base, and the lifting motor is installed at the driving end of the lifting module.

5. The horizontal valve seat online welding device according to claim 2, characterized in that: The rotary assembly comprises a fixed seat, a rotating platform and a rotary motor. The fixed seat is installed on the lifting module; the rotating platform is fixed on the fixed seat, and the rotary motor is installed on the driving end of the rotating platform.

6. The horizontal valve seat online welding device according to claim 2, characterized in that: The horizontal adjustment assembly includes a swivel seat, a connecting plate, a horizontal module, a horizontal motor and a welding gun mounting plate. The swivel seat is installed on a rotating platform; the connecting plate is fixed on the swivel seat; the horizontal module is fixed on the connecting plate; the welding gun mounting plate is fixed on the horizontal module; and the horizontal motor is installed on the driving end of the horizontal module.

7. The horizontal valve seat online welding device according to claim 2, characterized in that: The welding front end comprises a clamping block, a welding gun and a camera assembly, wherein the clamping block is mounted on a welding gun mounting plate; the welding gun is fixed on the clamping block; and the camera assembly is fixed on the welding gun.

8. The horizontal valve seat online welding device according to claim 2, characterized in that: The wire feeding assembly comprises a wire feeding machine, a wire feeding hose and a wire guide rod. The wire feeding machine is fixed on a rotating platform, the wire guide rod is fixed on a welding gun, and the wire feeding hose connects the wire reel, the wire feeding machine and the wire guide rod.

9. The horizontal valve seat online welding device according to claim 8, characterized in that: The wire guide rod has an arc-shaped structure, occupies a small space, and can meet the welding needs of a small space.

10. The horizontal valve seat online welding device according to claim 1, characterized in that: The adapter is installed on the flange of the valve and has different specifications according to the different installation interfaces of the repaired valve, so as to meet the fixing requirements of the equipment on different valves.

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