On-line high-precision chamfering device for valve seat ring of nuclear-grade electric gate valve of third-generation nuclear power plant

Abstract

This application discloses an online high-precision chamfering processing device for the valve seat ring of a nuclear-grade electric gate valve in a third-generation nuclear power plant. It aims to solve the problems of high precision and efficiency requirements in chamfering of sealing surfaces, as well as the inapplicability of traditional grinding machines due to limited working space. The chamfering processing device includes a valve shell simulation body, on which a chamfering device base is mounted. An X-axis slide is mounted on the chamfering device base, and a Z-axis slide is mounted on the X-axis slide. A Y-axis slide is mounted on the side of the Z-axis slide, and a grinding assembly is mounted on the Y-axis slide. A chamfering grinding tool is mounted at the lower end of the grinding assembly for chamfering. This application is applicable to environments with high precision and efficiency requirements for chamfering of sealing surfaces and limited working space, improving chamfering efficiency and reducing the difficulty of maintenance operations.

Description

Technical Field

[0001] This application belongs to the field of nuclear equipment technology, and in particular relates to an online high-precision chamfering processing device for the valve seat ring of a nuclear-grade electric gate valve in a third-generation nuclear power plant. Background Technology

[0002] In nuclear-grade electric gate valves, the actuator's thrust output decreases under dynamic conditions when the torque switching setting is applied under static conditions. AP1000 units require all nuclear-grade electric gate valves and globe valves to have their stem friction coefficient and actuator output efficiency under dynamic conditions verified according to ASME QME-1 requirements. Verification using EPRIPPM (Performance Prediction Model) software shows that the gate of the PV01 gate valve tilts during the intermediate stroke (half-open position) under high flow velocity. This generates high contact stress at the gate-seat sealing surface, potentially causing damage to the valve sealing surface, valve jamming, and an unpredictable increase in the required switching thrust, as follows: Figure 1 As shown, the valve closing force 101, the gate guide rib force 102, the fluid horizontal force 103, the valve seat friction force 104, the guide rib contact position 105, the guide rib friction force 106, the fluid vertical force 107, and the sealing surface contact position 108 are schematically shown.

[0003] According to literature from the Electric Power Research Institute (EPRI), damage to the sealing surface can be avoided by increasing the width of the chamfer and reducing its sharpness. The valve seat chamfer requirements are as follows: Figure 2 As shown, the dimensions and angles of the chamfer require high precision, which cannot be achieved by manual chamfering. Figure 2 The diagram schematically shows the chamfer height D7 (>1.6mm), chamfer bevel L (>2.2mm), valve seat sealing surface 201, valve seat inner diameter 202, and valve seat outer diameter 203.

[0004] The chamfering of gate valves is a specific requirement for AP1000 units, and there are no explicit requirements from domestic power plants; therefore, this work has not yet been performed in domestic nuclear power plants. The electrically operated gate valves involved in this issue are all nuclear Class 1 and 2 safety-related valves, some of which are at the primary circuit pressure boundary. Therefore, the maintenance window is limited, and high maintenance efficiency is required. Some valve locations are quite confined, making it impossible to use large maintenance equipment; therefore, lightweight maintenance equipment is required. Summary of the Invention

[0005] The purpose of this application is to provide an online high-precision chamfering processing device for the valve seat ring of nuclear-grade electric gate valves in third-generation nuclear power plants, which solves the problems of high processing accuracy, high processing efficiency, and limited working space that make traditional grinding machines unsuitable for chamfering of sealing surfaces.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] This application provides an online high-precision chamfering machining device for the seat ring of a nuclear-grade electric gate valve in a third-generation nuclear power plant. The device includes a valve shell simulation body, on which a chamfering device base is mounted. An X-axis slide is mounted on the chamfering device base, and a Z-axis slide is mounted on the X-axis slide. A Y-axis slide is mounted on the side of the Z-axis slide, and a grinding assembly is mounted on the Y-axis slide. A chamfering grinding tool is mounted on the lower end of the grinding assembly for machining the chamfer.

[0008] In some embodiments, the chamfering grinding tool includes a vertical rod, a centering sensor calibration ring, a position sensor, a position sensor fine-tuning screw, a centering assembly and a gauge plate mounting base, and a dial indicator. The dial indicator is mounted on the upper part of the vertical rod, and the lower part of the vertical rod is connected to the centering assembly and the gauge plate mounting base. The centering sensor calibration ring is mounted on the centering assembly and the gauge plate mounting base. The position sensor is arranged inside the centering sensor calibration ring and mounted on the centering assembly and the gauge plate mounting base via the position sensor fine-tuning screw.

[0009] In some embodiments, the number of vertical rods is two and they are arranged symmetrically, and each vertical rod is equipped with a dial indicator.

[0010] In some embodiments, the number of position sensors is 4, arranged at 90° intervals along the inner side of the centering sensor calibration circle.

[0011] In some embodiments, the grinding assembly includes a grinding disc, a spindle motor, and a grinding bracket. The grinding disc is connected to the grinding bracket, the grinding bracket is connected to the slider of the Y-axis grinding assembly, the spindle motor is connected to the grinding bracket, and the spindle motor and the grinding disc are driven by a belt.

[0012] In some embodiments, the X-axis slide is connected to the Z-axis slide via an X / Z connecting plate, and the X-axis drive motor drives the X / Z connecting plate to move in the X-axis direction according to a drive signal; the Y-axis slide is connected to the Y-axis slide via a Y / Z connecting plate, and the Z-axis drive motor drives the Y / Z connecting plate to move in the Z-axis direction according to a drive signal; the Y-axis drive motor is connected to the grinding assembly transmission nut via a ball screw, and the Y-axis drive motor drives the slider to move in the Y-axis direction according to a drive signal.

[0013] In some embodiments, the X-axis slide includes an X-axis base plate, a guide rail, and an X-axis motor. The X-axis base plate and the guide rail are connected by bolts, and the X-axis motor and the base plate are connected by bolts. The Y-axis slide includes a Y-axis base plate, a guide rail, and a Y-axis motor. The Y-axis base plate and the guide rail are connected by bolts, and the Y-axis motor and the base plate are connected by bolts. The Z-axis slide includes a Z-axis base plate, a guide rail, and a Z-axis motor. The Z-axis base plate and the guide rail are connected by bolts, and the Z-axis motor and the base plate are connected by bolts.

[0014] In some embodiments, the chamfering device base is provided with an X-axis slide mounting groove, and the X-axis slide is installed in the X-axis slide mounting groove.

[0015] In some embodiments, the upper part of the chamfering device base is an inclined surface with an angle of 5°, and the lower part has a positioning boss.

[0016] In some embodiments, the axis of the X-axis slide is parallel to the axis of the pipe of the valve housing simulator.

[0017] Compared with existing technologies, the online high-precision chamfering machining device for the valve seat ring of nuclear-grade electric gate valves for third-generation nuclear power plants provided in this application has the following advantages:

[0018] This application is applicable to environments where high precision and efficiency are required for chamfering sealing surfaces, and where the working space is limited.

[0019] This application utilizes sensors, controllers, and drive motors to automate the inner chamfering of the valve seat sealing surface of gate valves, thereby improving the efficiency of chamfering and reducing the difficulty of maintenance operations.

[0020] Furthermore, the maintenance equipment for the inner circle chamfer of the gate valve seat sealing surface in this application adopts a split-combination design, which is easy to disassemble and assemble, and has the characteristics of small size, light weight and easy to carry, making it suitable for on-site chamfering work of gate valves. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the technical description will be briefly introduced below.

[0022] Figure 1 A schematic diagram of gate tilting under the action of high-velocity media in existing technology;

[0023] Figure 2 This is a schematic diagram of the inner circle chamfer of the sealing surface of a gate valve in the prior art;

[0024] Figure 3 A schematic diagram of the online high-precision chamfering machining device for the seat ring of a nuclear-grade electric gate valve in a third-generation nuclear power plant provided in this application;

[0025] Figure 4 A schematic diagram showing the adjustment of the concentricity and parallelism between the special chamfering grinding tool provided in this application and the valve seat.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Valve housing simulator; 2. Chamfering device base; 3. X-axis slide; 4. X / Z-axis connecting plate; 5. Y-axis slide; 6. Y / Z-axis connecting plate; 7. Z-axis slide; 8. Grinding assembly; 9. Parallelism fine-tuning knob; 10. Vertical rod; 11. Centering sensor calibration ring; 12. Position sensor; 13. Position sensor fine-tuning screw; 14. Centering assembly and gauge mounting base; 15. Dial indicator;

[0028] 101. Valve closing force; 102. Force exerted by gate guide ribs; 103. Horizontal force exerted by fluid; 104. Valve seat friction; 105. Contact position of guide ribs; 106. Friction of guide ribs; 107. Vertical force exerted by fluid; 108. Contact position of sealing surfaces;

[0029] 201. Valve seat sealing surface; 202. Valve seat inner diameter; 203. Valve seat outer diameter. Detailed Implementation

[0030] The following detailed description provides further details on specific implementation methods.

[0031] This application provides an online high-precision chamfering device for the seat ring of a nuclear-grade electric gate valve in a third-generation nuclear power plant, including a chamfering device base 2, a three-dimensional slide, a grinding assembly 8, and a control system. The chamfering device base 2 is used to reliably fix maintenance equipment to the flange of the gate valve. The three-dimensional slide is connected to the upper surface of the chamfering device base 2, providing movement in three coordinate directions for the chamfering operation. The grinding assembly 8 is connected to the three-dimensional slide and directly contacts the sealing surface of the gate valve, providing torque for the chamfering grinding. The control system controls the displacement of the three-dimensional slide and the grinding movement of the grinding assembly 8 through control software and a controller.

[0032] The chamfering device base 2 includes a base body and connecting bolts. The stop of the chamfering device base 2 is completely recessed into the gate valve flange hole, with its direction parallel to the X-axis slide 3 mounting side and the valve pipeline axis. The lower surface of the base has two screw holes, which are fixed to the valve flange by two fixing bolt assemblies and one limiting plate assembly. The fixing bolt assembly, from bottom to top, consists of a nut, a flat washer, a spring, and a positioner, passing through the flange hole and connecting to the base screw holes. The limiting plate assembly, from bottom to top, consists of a nut, a flat washer, a spring, and a positioner; the screw passes through the flange hole and connects to the angled plate via a nut.

[0033] The three-dimensional slide table includes an X-axis slide table 3, a Y-axis slide table 5, a Z-axis slide table 7, an X / Z connecting plate 4, a Y / Z connecting plate 6, a drive motor, and a Y-axis grinding component slider. The X-axis slide table 3 is connected to the Z-axis slide table 7 via the X / Z connecting plate 4. The X-axis drive motor moves the X / Z connecting plate 4 in the X-axis direction according to a drive signal. The Z-axis slide table 5 is connected to the Y-axis slide table via the Y / Z connecting plate 6. The Z-axis drive motor moves the Y / Z connecting plate 6 in the Z-axis direction according to a drive signal. The Y-axis drive motor is connected to the grinding component transmission nut via a ball screw. The Y-axis drive motor moves the slider in the Y-axis direction according to a drive signal.

[0034] The grinding assembly 8 includes a grinding disc, a calibration disc, a spindle motor, and a grinding bracket. The grinding disc has the same dimensions as the gate valve sealing surface and is fixed to the grinding bracket with four screws. The grinding bracket is connected to the Y-axis grinding assembly drive nut with four screws. Four sensors are evenly distributed around the calibration disc for locating the machining center point. The spindle motor is connected to the grinding bracket with four screws, and the spindle motor and grinding disc are driven by a belt.

[0035] The control system includes a controller, a hand-held remote control, and control software. The controller connects to the X-axis, Y-axis, and Z-axis motors and the spindle via cables, providing power and signals for motor operation. The controller receives position signals and displays coordinate information on the operating software. The control software inputs the feed rate, and the controller controls the spindle motor and the 3D slide table movement. The hand-held remote control connects to the controller, allowing manual control of the 3D slide table movement and system emergency stop.

[0036] like Figure 3 As shown, this device specifically includes a valve housing simulator 1, a chamfering device base 2, an X-axis slide 3, an X / Z-axis connecting plate 4, a Y-axis slide 5, a Y / Z-axis connecting plate 6, a Z-axis slide 7, a grinding assembly 8, and a parallelism fine-tuning knob 9.

[0037] A chamfering device base 2 is installed on the valve housing simulation body 1. An X-axis slide 3 is installed on the chamfering device base 2. A Z-axis slide 7 is installed on the X-axis slide 3. A Y-axis slide 5 is installed on the side of the Z-axis slide 7. A grinding assembly 8 is installed on the Y-axis slide 5. A chamfering grinding tool is installed at the lower end of the grinding assembly 8 for processing chamfers.

[0038] like Figure 4 As shown, the chamfering grinding tool includes two vertical rods 10, a centering sensor calibration ring 11, a position sensor 12, a position sensor fine-tuning screw 13, a centering assembly, and a gauge mounting base plate 14.

[0039] Each vertical rod 10 is equipped with a dial indicator 15. The vertical rod 10 is used to increase the height of the gauge cylinder, which is used to calibrate the parallelism between the device and the sealing surface. It should be noted that the dial indicator 15 is a component of the gauge cylinder, both used for measuring dimensions. Because the distance between the two valve seats of the gate valve is too narrow to directly mount a dial indicator, a gauge cylinder is used. The vertical rod 10 and the dial indicator 15 are components of the gauge cylinder.

[0040] The centering sensor calibration ring 11 is installed on the centering assembly and the gauge mounting base 14, and two vertical rods 10 are symmetrically installed on the centering assembly and the gauge mounting base 14. The centering assembly and the gauge mounting base 14 are aligned with the grinding shaft for centering. The two vertical rods 10 are symmetrically arranged on both sides of the grinding assembly 8.

[0041] Four position sensors 12 are arranged at 90° angles along the inner side of the centering sensor calibration ring 11, and are fixed to the centering assembly and the gauge mounting base 14 by position sensor fine-tuning screws 13. The position sensor fine-tuning screws 13 are used for precise adjustment when calibrating the operating point of the position sensors 12.

[0042] In one embodiment, the centering sensor calibration ring 11 is made of 40Cr heat treatment and precision machined to adjust the action point of the position sensor 12 and simultaneously to zero the gauge cylinder, and to calibrate the distance from the contact point of the centering sensor calibration ring 11 to the sealing surface, for example, 0.5mm.

[0043] In one embodiment, the internal dimensions of the valve housing simulator 1 are designed and manufactured according to the actual object, and the seat ring adopts a quick-replacement design to facilitate multiple simulation operations.

[0044] In one embodiment, the upper part of the chamfering device base 2 is a slope with an angle of 5°, and the lower part has a positioning boss that cooperates with the sealing stop on the upper part of the valve body.

[0045] In one embodiment, the X-axis slide 3 is a precision module, and considering the operating space, it is arranged to the side to avoid obstacles in the X direction. The X-axis slide 3 includes an X-axis base plate, a guide rail, and an X-axis motor. The X-axis base plate and the guide rail are connected by bolts, and the X-axis motor and the base plate are connected by bolts.

[0046] In one embodiment, the X-axis slide 3 and the Z-axis slide 7 are connected by an X / Z-axis connecting plate 4, which specifically connects the Z-axis base plates of the X-axis slide 3 and the Z-axis slide 7. The X / Z-axis connecting plate 4 is machined from a single piece of material to reduce cumulative errors.

[0047] In one embodiment, the Y-axis slide 5 is a precision module, which is offsetly installed while meeting the diameter requirements of the Z-axis interpolation circle. When changing the grinding wheel, center positioning component, and parallelism positioning component, the slide moves to the right for convenient operation. The Y-axis slide 5 includes a Y-axis base plate, a guide rail, and a Y-axis motor. The Y-axis base plate and the guide rail are connected by bolts, and the Y-axis motor and the base plate are connected by bolts.

[0048] In one embodiment, the Y-axis slide 5 and the Z-axis slide 7 are connected by a Y / Z-axis connecting plate 6, which specifically connects the Z-axis slide 7 and the Y-axis base plate of the Y-axis slide 5.

[0049] In one embodiment, the Z-axis slide 7 is a precision module, positioned slightly to the left to avoid obstruction when changing the grinding wheel and positioning components. The Z-axis slide 7 includes a Z-axis base plate, a guide rail, and a Z-axis motor. The Z-axis base plate and the guide rail are connected by bolts, and the Z-axis motor and the base plate are also connected by bolts.

[0050] In one embodiment, the chamfering device base 2 has an X-axis slide mounting groove, and the X-axis slide 3 is installed in the X-axis slide mounting groove.

[0051] In one embodiment, the valve housing simulation body 1 has a flange surface, and the chamfering device base 2 is placed on the flange surface of the valve housing simulation body 1. The stop of the base 2 is completely sunk into the flange hole, so that it cannot jump up and down.

[0052] In one embodiment, the center lines of the valve seat on the X-axis slide 3 and the valve body simulation body 1 are parallel. After adjusting for parallelism, the fixing bolt assembly and the limiting plate assembly are installed, and the base fixing bolts are tightened.

[0053] The specific installation and usage process of the device provided in this application is as follows:

[0054] First, install the chamfering device base 2. Place the chamfering device base 2 on the flange face of the valve body simulation body 1. The stop of the base 2 must be fully recessed into the flange hole and should not move up and down. Adjust the direction to ensure that the X-axis slide 3 and the pipeline axis of the valve body simulation body 1 are basically parallel. Install the fixing bolts and limit plate, and tighten the base fixing bolts.

[0055] The second step is to install the 3D slide. Remove the four M5 hex screws from the X-axis slide, lift the Y and Z slide assembly onto the X-axis slide, and secure it with the four M5 hex screws that were just removed. Install the X-axis motor, Y-axis motor, and Z-axis motor. Insert the motor shafts into the coupling, first secure the motors with the four M5 screws, and then tighten the coupling.

[0056] The third step is to install the grinding assembly 8. The grinding assembly 8 consists of a calibration disc and a grinding support, wherein the calibration disc can be removed and replaced with a grinding disc. The calibration disc is used for position calibration.

[0057] The grinding bracket is secured to the Y-axis slider backplate with four M10 screws. The calibration disc is mounted on the side of the grinding bracket facing away from the stainless steel cover. The calibration disc is secured to the grinding bracket with four M4 screws.

[0058] The fourth step is to connect the power supply, controller, and drive motor using the appropriate cables.

[0059] Step 5: System Reset. Turn on the device power and release the emergency stop buttons on the controller and hand pulse remote control, then wait for the device self-test to complete. Check if the position sensors on each guide rail are functioning correctly (the indicator lights on the sensors should be lit). Switch the controller to manual mode. Figure 2 Turn the green "Chamfering motor powered" option on the touchscreen display to red "Chamfering motor powered off" to shut down the spindle motor. Press the "System Reset" button on the control box. After the system reset is complete, the reset completion indicator in the lower left corner of the display will change from red to green. Install the calibration ring on the calibration plate and observe whether the up, down, left, and right indicator lights on the positioning plate on the display are all lit. If any are not lit, manually fine-tune the corresponding sensor to bring it to the position where it is just lit, and zero the two dial indicators.

[0060] Step 6: Confirm the center position. Activate the hand pulse control and move the hand pulse remote grinding assembly 8 to a position where the Z-axis is descending (negative direction) without obstruction. Activate the hand pulse control and click "Z-axis Descending Position Confirmation" on the controller display. Activate the hand pulse control and lower the hand pulse remote calibration disc to near the sealing surface of the valve to be processed. Slowly move the hand pulse calibration disc closer to the sealing surface (avoiding collision with the pipe wall). Observe the pointers of the two dial indicators. When either dial indicator pointer begins to change, slow down the X-axis movement speed. Simultaneously adjust the two parallelism adjusting screws on the side of the device base so that both dial indicator pointers stop at zero simultaneously, confirming the center position. Activate the hand pulse control and press the "Center Positioning" button on the controller. Record the center coordinate position at this time. After positioning is complete, automatically return to the allowed Z-axis descent position.

[0061] Step 7: Install the grinding disc. Open the handpiece and move the grinding assembly 8 to the grinding disc installation position (Z-axis slide 7 to the upper limit, Y-axis slide 5 to the limit away from X-axis slide 3), remove the calibration disc, and install the grinding disc.

[0062] Step 8, Tool Setting. Turn off manual pulse start. Click the "To Y, Z Starting Point" option on the controller display; the default is 2mm above the center point. Turn on manual pulse start, turn on "Chamfering Motor Powered," and turn on "Chamfering Motor Start." The grinding wheel will begin rotating. Manually control the grinding wheel to slowly approach the surface to be machined. When the grinding wheel contacts the surface, immediately stop the X-axis movement and turn off manual pulse start. Click "Tool Setting Position Teaching" on the display and record the Z-axis position coordinates at this point. Turn on manual pulse start again. Manually control the grinding wheel to slowly move in the negative Z-axis direction, setting the tool along the lower edge of the surface to be machined. Record the Z-axis position coordinates when the grinding wheel contacts the lower edge of the surface. The difference between the two Z-axis coordinates is the major axis value of the ellipse compensation.

[0063] Step 9: Automatic chamfering of the surface to be processed. (Controller system settings screen) Figure 3 Enter the ellipse compensation value, input the feed value according to the machining dimensions, and switch the controller to automatic mode. (Controller automatic mode screen) Figure 4 This is the data monitoring screen. After processing is complete, use a flexible model of clay to measure the right-angled or beveled side dimensions of the valve seat chamfer to confirm whether it meets the acceptance criteria. If it does not meet the criteria, repeat step nine until the acceptance criteria are met.

[0064] Step 10: Reset complete. Remove the grinding disc from valve housing simulation 1, and remove the chamfering equipment from valve housing simulation 1 following the assembly steps.

[0065] The above description is only a specific embodiment of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A high-precision online chamfering machining device for the seat ring of a nuclear-grade electric gate valve in a third-generation nuclear power plant, characterized in that, The device includes a valve housing simulation body (1), on which a chamfering device base (2) is mounted. An X-axis slide (3) is mounted on the chamfering device base (2), and a Z-axis slide (7) is mounted on the X-axis slide (3). A Y-axis slide (5) is mounted on the side of the Z-axis slide (7). A grinding assembly (8) is mounted on the Y-axis slide (5) for chamfering. The grinding assembly (8) includes a grinding disc, a spindle motor, and a grinding bracket. The grinding disc is connected to the grinding bracket, and the grinding bracket is connected to the Y-axis grinding assembly slider. The spindle motor is connected to the grinding bracket, and the spindle motor and the grinding disc are driven by a belt. A chamfering grinding tool is mounted on the lower end of the grinding assembly (8). The chamfering grinding tool includes a vertical rod (10), a centering sensor calibration ring (11), a position sensor (12), a position sensor fine-tuning screw (13), a centering assembly and a gauge mounting base plate (14), and a dial indicator (15). The dial indicator (15) is mounted on the upper part of the vertical rod (10), and the lower part of the vertical rod (10) is connected to the centering assembly and the gauge mounting base plate (14). The centering sensor calibration ring (11) is mounted on the centering assembly and the gauge mounting base plate (14). The position sensor (12) is arranged inside the centering sensor calibration ring (11) and mounted on the centering assembly and the gauge mounting base plate (14) through the position sensor fine-tuning screw (13).

2. The online high-precision chamfering machining device for the valve seat ring of a nuclear-grade electric gate valve in a third-generation nuclear power plant according to claim 1, characterized in that, The number of vertical rods (10) is two and they are arranged symmetrically. Each vertical rod (10) is equipped with a dial indicator (15).

3. The online high-precision chamfering machining device for the valve seat ring of a nuclear-grade electric gate valve in a third-generation nuclear power plant according to claim 1, characterized in that, The number of position sensors (12) is 4, and they are arranged at 90° intervals along the inner side of the center-finding sensor calibration circle (11).

4. The online high-precision chamfering processing device for the valve seat ring of a nuclear-grade electric gate valve in a third-generation nuclear power plant according to claim 1, characterized in that, The X-axis slide (3) is connected to the Z-axis slide (7) via the X / Z connecting plate (4), and the X-axis drive motor drives the X / Z connecting plate (4) to move in the X-axis direction according to the drive signal; the Y-axis slide (5) is connected to the Y-axis slide via the Y / Z connecting plate (6), and the Z-axis drive motor drives the Y / Z connecting plate (6) to move in the Z-axis direction according to the drive signal; The Y-axis drive motor is connected to the transmission nut of the grinding assembly via a ball screw. The Y-axis drive motor drives the slider to move in the Y-axis direction according to the drive signal.

5. The online high-precision chamfering machining device for the valve seat ring of a nuclear-grade electric gate valve in a third-generation nuclear power plant according to claim 1, characterized in that, The X-axis slide (3) includes an X-axis base plate, a guide rail, and an X-axis motor. The X-axis base plate and the guide rail are connected by bolts, and the X-axis motor and the base plate are connected by bolts. The Y-axis slide (5) includes a Y-axis base plate, a guide rail, and a Y-axis motor. The Y-axis base plate and the guide rail are connected by bolts, and the Y-axis motor and the base plate are connected by bolts. The Z-axis slide (7) includes a Z-axis base plate, a guide rail, and a Z-axis motor. The Z-axis base plate and the guide rail are connected by bolts, and the Z-axis motor and the base plate are connected by bolts.

6. The online high-precision chamfering machining device for the valve seat ring of a nuclear-grade electric gate valve in a third-generation nuclear power plant according to claim 1, characterized in that, The chamfering device base (2) has an X-axis slide table mounting groove, and the X-axis slide table (3) is installed in the X-axis slide table mounting groove.

7. The online high-precision chamfering machining device for the valve seat ring of a nuclear-grade electric gate valve in a third-generation nuclear power plant according to claim 1, characterized in that, The upper part of the chamfering device base (2) is a sloping surface with an angle of 5°, and the lower part has a positioning boss.

8. The online high-precision chamfering machining device for the valve seat ring of a nuclear-grade electric gate valve in a third-generation nuclear power plant according to claim 1, characterized in that, The axis of the X-axis slide (3) is parallel to the axis of the pipe of the valve housing simulator (1).

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