Portable field processing system for online repair of horizontal valve seat of nuclear power plant

Abstract

The utility model belongs to the technical field of machining, and particularly relates to a portable field machining system for online repair of a horizontal valve seat of a nuclear power plant. Comprising a cutting machine mechanical body, a cable, an upper computer and a control cabinet, and the cutting machine mechanical body is connected with the upper computer and the control cabinet through the cable; and the cutting machine mechanical body enters the hot chamber and is mounted on the valve seat to be repaired. The valve seat cutting device has the advantages that cutting operation can be remotely controlled, the radiation dose of personnel is reduced, and the valve seat cutting device is provided with cutter assemblies and adapters of various models so as to adapt to valve seats of different models. The whole equipment is resistant to irradiation, high in machining precision, capable of achieving quick disassembly and assembly, light and convenient to carry, compact in structure and small in size, and transportation, installation and fixation of personnel in a narrow space are facilitated. The device has the function of remotely monitoring equipment processing.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of machining, specifically relates to a portable field machining system for on-line repair of horizontal valve seat of nuclear power plant. BACKGROUND

[0002] Valves are control components in fluid conveying systems, with functions of stopping, regulating, guiding flow, preventing backflow, stabilizing pressure, shunting or overflow pressure relief, etc. In nuclear power plants, valves not only control the flow and pressure of fluids such as air, water, steam, various corrosive media and radioactive media in pipelines, but also isolate contaminants in pipelines, prevent leakage and diffusion of radioactive substances, and ensure the safe operation of nuclear power plants. As an important part of valves, the sealing performance of valve seats directly affects the safety and reliability of valves. A large number of welded gate valves, safety valves and other types of horizontal valves are used in nuclear power plants. When damage occurs to the valve seats of such valves, the overall replacement method of cutting off the damaged valve from the pipeline and welding a new valve is usually used for repair. Such gate valves are mostly imported products, which are expensive and have a long customization cycle, and are not conducive to the maintenance and operation of nuclear power plants. Therefore, it is considered to repair the valves by replacing the valve seats online. By replacing the valve seats online, a large amount of funds can be saved, the maintenance cycle can be shortened, and the damage to the pipeline caused by cutting can be reduced.

[0003] An important repair of valves is the repair of valve sealing surfaces, which involves cutting and removing damaged sealing surfaces and finishing the sealing surfaces after surfacing. Generally, the machining machines are large in size and heavy in weight, and cannot be transported to the machining position of the valve to be repaired for machining.

[0004] Therefore, it is necessary to provide a portable field machining system for on-line repair of horizontal valve seat of nuclear power plant, which should solve the following problems:

[0005] (1) wide range of valve body applications;

[0006] (2) light weight of equipment, convenient to transport and install;

[0007] (3) remote control in cutting process, reducing personnel intervention;

[0008] (4) high machining precision;

[0009] (5) whole process of machining can be monitored. UTILITY MODEL CONTENTS

[0010] The utility model aims to provide a portable field machining system for on-line repair of horizontal valve seat of nuclear power plant, which has a wide range of valve body applications, is light in weight and convenient to transport and install, adopts remote control in cutting process, reduces personnel intervention, has high machining precision and the whole process of machining can be monitored.

[0011] The utility model discloses a technical scheme as follows: a portable field processing system for on-line repair of horizontal valve seat of nuclear power plant, including cutting machine mechanical body, cable, host computer and control cabinet, cutting machine mechanical body passes through cable with host computer, and control cabinet is connected, cutting machine mechanical body enters hot chamber, and is installed on the valve seat to be repaired.

[0012] The cutting machine mechanical body includes a lifting ring, a lifting assembly, an adapter, a main shaft assembly, a cutter assembly and a wireless monitoring camera, the lifting ring is installed above the lifting assembly, the adapter is installed below the lifting assembly, the main shaft assembly is installed on a connecting plate of the lifting assembly, the cutter assembly is installed below the main shaft assembly, and the wireless monitoring camera is fixed on the cutter assembly.

[0013] The lifting assembly includes a lifting motor, a shaft coupling, a flange, a support plate, a lead screw assembly, a machine tool bed, a connecting plate and a guide rail slider, the lifting motor is connected with the lead screw assembly through the shaft coupling, the lifting motor is fixed through the flange and the support plate, the support plate is fixed above the machine tool bed, the lead screw assembly is fixed on one side of the connecting plate, and the connecting plate is connected with the machine tool bed through the guide rail slider.

[0014] The main shaft assembly includes a main shaft motor, a shaft coupling, a main shaft, a flange, an upper end cover, a tension bolt, a shaft box, a bearing, a lower end cover, a radial slide and a radial slide motor, the main shaft motor is connected with the main shaft through the shaft coupling, the main shaft motor is fixed through the flange and the shaft box, the radial slide is fixed with the main shaft through the tension bolt, the shaft box is provided with the bearing, the main shaft is installed in the shaft box through the bearing, the upper end cover and the lower end cover are installed on the upper and lower ends of the shaft box, and the radial slide motor is installed on one side of the radial slide.

[0015] The cutting machine mechanical body is hoisted through the lifting ring.

[0016] The lifting assembly controls the lifting of the main shaft assembly.

[0017] The radial slide controls the radial movement of the cutter assembly.

[0018] The main shaft assembly controls the rotation of the cutter assembly.

[0019] The lifting motor, the main shaft motor and the radial slide motor are connected with the cable through quick plug connectors, and the lifting assembly and the main shaft assembly are quickly disassembled, quickly assembled and easily carried.

[0020] The cutting machine mechanical body is fixed on the valve seat to be repaired through the corresponding type adapter.

[0021] The utility model discloses a beneficial effect lies in: can carry out cutting operation of remote control, reduce personnel radiation dose, have a plurality of types of cutter assembly and adapter to adapt to different models valve seat. The whole equipment is irradiation resistant, and the machining precision is high, can realize quick detach quick dress, portable, compact structure, small, the transport and installation fixed of personnel in the narrow space are facilitated. Have the function of remote monitoring equipment processing. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a kind of portable field processing system schematic diagram for the on-line repair of horizontal valve seat of nuclear power plant provided by the utility model;

[0023] Figure 2 It is cutting machine mechanical body structure schematic diagram;

[0024] Figure 3 It is lifting assembly structure schematic diagram;

[0025] Figure 4 It is main shaft assembly structure schematic diagram;

[0026] Figure 5 It is the schematic diagram of the utility model under the condition one;

[0027] Figure 6 It is the schematic diagram of the utility model under the condition two.

[0028] In the drawing: 1 cutting machine mechanical body, 2 cable, 3 upper computer, 4 control cabinet, 5 random accessory, 11 lifting ring, 12 lifting assembly, 13 adapter, 14 main shaft assembly, 15 cutter assembly, 16 wireless monitoring camera, 1201 lifting motor, 1202 coupling, 1203 flange, 1204 support plate, 1205 screw assembly, 1206 machine tool bed, 1207 connecting plate, 1208 guide rail sliding block, 1401 main shaft motor, 1402 coupling, 1403 main shaft, 1404 flange, 1405 upper end cover, 1406 tension bolt, 1407 shaft box, 1408 bearing, 1409 lower end cover, 1410 flat spinning disc, 1411 flat spinning disc motor, 131 adapter one, 161 cutter assembly one, 51 condition one, 132 adapter two, 162 cutter assembly two, 52 condition two. DETAILED DESCRIPTION

[0029] The utility model will be further explained in detail in connection with the drawings and specific embodiment.

[0030] As Figure 1As shown, the utility model provides a kind of portable field processing system for nuclear power plant horizontal valve seat on-line repair, including cutting machine mechanical body 1, cable 2, host computer 3, control cabinet 4, random accessory 5 (including scrap collecting device, independent use, for cleaning the metal chip generated after processing cutting), cutting machine mechanical body 1 is connected with host computer 3 by cable 2, control cabinet 4.Cutting machine mechanical body 1 is installed to the valve to be processed by construction personnel, after installation is completed, operating personnel controls and monitors cutting machine mechanical body 1 operation by host computer remote, reduces the radiation dose of personnel.Cutting machine mechanical body 1 is connected with host computer 3 by cable 2, control cabinet 4;Cutting machine mechanical body 1 enters hot chamber, is installed on the valve seat to be repaired.Personnel controls cutting machine mechanical body 1 to complete repair work by host computer 3 and control cabinet 4 outside hot chamber, reduces the radiation dose of personnel.

[0031] As Figure 2 Shown, cutting machine mechanical body 1 includes lifting ring 11, lifting assembly 12, adapter 13, spindle assembly 14, tool assembly 15, wireless monitoring camera 16.Lifting ring 11 is installed above lifting assembly 12, adapter 13 is installed below lifting assembly 12, spindle assembly 14 is installed on the connecting plate 1207 of lifting assembly 12, tool assembly 15 is installed below spindle assembly 14, wireless monitoring camera 16 is fixed on tool assembly 15.

[0032] As Figure 3 Shown, lifting assembly 12 includes lifting motor 1201, shaft coupling 1202, flange 1203, support plate 1204, screw assembly 1205, machine tool bed 1206, connecting plate 1207 and guide rail sliding block 1208, lifting motor 1201 is connected with screw assembly 1205 by shaft coupling 1202, lifting motor 1201 is fixed by flange 1203 and support plate 1204, support plate 1204 is fixed above machine tool bed 1206, screw assembly 1205 is fixed on one side of connecting plate 1207, connecting plate 1207 is connected with machine tool bed 1206 by guide rail sliding block 1208.

[0033] As Figure 4As shown, the main shaft assembly 14 includes a main shaft motor 1401, a shaft coupling 1402, a main shaft 1403, a flange 1404, an upper end cover 1405, a tension bolt 1406, a shaft box 1407, a bearing 1408, a lower end cover 1409, a flat rotary disc 1410 and a flat rotary disc motor 1411, the main shaft motor 1401 is connected with the main shaft 1403 through the shaft coupling 1402, the main shaft motor 1401 is fixed with the shaft box 1407 through the flange 1404, the flat rotary disc 1410 is fixed with the main shaft 1403 through the tension bolt 1406, the shaft box 1407 is internally provided with the bearing 1408, the main shaft 1403 is installed in the shaft box 1407 through the bearing 1408, the shaft box 1407 is provided with the upper end cover 1405 and the lower end cover 1409 at upper and lower ends, and the flat rotary disc motor 1411 is installed on one side of the flat rotary disc 1410.

[0034] The cutting machine mechanical body 1 can be hoisted through the lifting ring 11. The lifting assembly 12 controls the lifting of the main shaft assembly 14. The flat rotary disc 1410 controls the radial movement of the cutter assembly 15. The main shaft assembly 14 controls the rotation of the cutter assembly 15. The lifting motor 1401, the main shaft motor 1401 and the flat rotary disc motor 1411 are connected through a cable of a quick plug connector. The lifting assembly 12 and the main shaft assembly 14 can be quickly disassembled and assembled and are light to carry. The cutter assembly 15 can be adapted to different working conditions by replacing different types of cutters. The cutting machine mechanical body 1 can be fixed on the valve seat to be repaired through a corresponding adapter 13. The adapter 13 can be adapted to different working conditions by replacing the adapter.

[0035] In use, the components are carried into the hot chamber, and after being quickly assembled as a whole, are hoisted onto the valve seat to be cut through the lifting ring 11 and are fixed on the valve seat of the valve body to be repaired through the corresponding adapter 13. Personnel outside the hot chamber connect the upper computer 3 and the control cabinet 4 through the cable 2 to control the cutting machine mechanical body 1 to perform repair work and monitor the cutting machine machining condition.

[0036] In use, the lifting assembly 12 controls the main shaft assembly 14 to descend to a specified machining position, the flat rotary disc motor 1411 controls the flat rotary disc 1401 to realize the radial movement of the cutter assembly 15 to the specified machining position, the main shaft motor 1401 drives the main shaft 1403 and the cutter assembly 15 to rotate to realize cutting work, and personnel observe the cutter cutting condition and the machining completion condition through the upper computer 3.

[0037] The above specific embodiment is only used for explaining and describing the design concept of the utility model, and its role is to facilitate the understanding and implementation of the related technical personnel, and is not limited to the protection scope of the utility model, so the equivalent change by using the design concept of the utility model still belongs to the protection scope of the utility model.

Claims

1. A portable field machining system for on-line repair of a nuclear power plant horizontal valve seat, characterized by: Including cutting machine body, cable, host computer and control cabinet, cutting machine body through cable and host computer, control cabinet is connected;Cutting machine body enters hot room, is installed on the valve seat to be repaired.

2. A portable field machining system for on-line repair of a nuclear power plant horizontal valve seat as defined in claim 1, characterized in that: The cutting machine body includes a lifting assembly, an adapter, a main shaft assembly, a tool assembly, and a wireless monitoring camera, the lifting assembly is installed above the lifting assembly, the adapter is installed below the lifting assembly, the main shaft assembly is installed on the connecting plate of the lifting assembly, the tool assembly is installed below the main shaft assembly, and the wireless monitoring camera is fixed on the tool assembly.

3. A portable field machining system for on-line repair of a nuclear power plant horizontal valve seat as defined in claim 2 wherein: The lifting assembly includes a lifting motor, a shaft coupling, a flange, a support plate, a lead screw assembly, a machine tool bed, a connecting plate, and a guide rail slider, the lifting motor is connected with the lead screw assembly through the shaft coupling, the lifting motor is fixed with the support plate through the flange, the support plate is fixed above the machine tool bed, the lead screw assembly is fixed on one side of the connecting plate, and the connecting plate is connected with the machine tool bed through the guide rail slider.

4. A portable field machining system for on-line repair of a nuclear power plant horizontal valve seat as defined in claim 2 wherein: The main shaft assembly includes a main shaft motor, a shaft coupling, a main shaft, a flange, an upper end cover, a tension bolt, a shaft box, a bearing, a lower end cover, a flat rotary disc, and a flat rotary disc motor, the main shaft motor is connected with the main shaft through the shaft coupling, the main shaft motor is fixed with the shaft box through the flange, the flat rotary disc is fixed with the main shaft through the tension bolt, the shaft box is provided with the bearing, the main shaft is installed in the shaft box through the bearing, the upper end cover and the lower end cover are installed on the upper and lower ends of the shaft box, and the flat rotary disc motor is installed on one side of the flat rotary disc.

5. A portable field machining system for on-line repair of horizontal valve seats in nuclear power plants as defined in claim 2, wherein: The cutting machine body is hoisted through the lifting ring.

6. A portable field machining system for on-line repair of a nuclear power plant horizontal valve seat as defined in claim 2 wherein: The lifting assembly controls the lifting of the main shaft assembly.

7. A portable field machining system for on-line repair of horizontal valve seats in nuclear power plants as defined in claim 4, characterized in that: The flat rotary disc controls the radial movement of the tool assembly.

8. A portable field machining system for on-line repair of a nuclear power plant horizontal valve seat as defined in claim 2 wherein: The main shaft assembly controls the rotation of the tool assembly.

9. A portable field machining system for on-line repair of a nuclear power plant horizontal valve seat as defined in claim 2 wherein: The cutting machine body is fixed on the valve seat to be repaired through the corresponding type adapter.

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