Valve seat face machining device

Abstract

The application belongs to the technical field of valve processing, and more particularly relates to a valve clack sealing surface processing device, which comprises a rack, a mounting mechanism and a processing mechanism, the mounting mechanism comprises a clamping assembly for clamping the valve clack; the processing mechanism comprises a processing head for processing the sealing surface of the valve clack; the mounting mechanism further comprises a first adjusting assembly and a second adjusting assembly, the first adjusting assembly is connected with the clamping assembly and is used for driving the clamping assembly to rotate around a first direction, so that different sealing surfaces of the valve clack clamped on the clamping assembly are moved to be opposite to the processing head; the second adjusting assembly is connected with the clamping assembly and is used for driving the clamping assembly to rotate around a second direction, so that different positions of the same sealing surface of the valve clack clamped on the clamping assembly are opposite to the processing head; in this way, the valve clack can be turned over, the sealing surface can be changed and the position of the valve clack can be moved, the efficiency of valve clack maintenance is improved, manual movement of the valve clack is not needed, manual operation errors can be eliminated, and the repair quality of the sealing surface is improved.

Description

Technical Field

[0001] This application belongs to the field of valve processing technology, and more specifically, relates to a processing device for valve disc sealing surface. Background Technology

[0002] As a key component of the containment barrier system in nuclear power plants, the quality of the valve disc sealing surface of nuclear-grade high-level radioactive gate valves directly affects the sealing performance and operational reliability of the equipment. A gate valve is a valve that moves perpendicularly to the centerline of the flow path. Its valve disc moves vertically relative to the fluid within the valve seat to cut off the flow section, thereby closing the valve. Therefore, the seal between the valve disc and the valve seat directly affects the reliability of the valve's closure. In other words, the valve disc sealing surface is the core factor affecting the valve's sealing performance. Specifically, the valve disc sealing surface refers to the contact surface between the valve disc and the valve seat in a gate valve, used to ensure the valve's sealing performance and prevent fluid leakage. The quality and performance of the valve sealing surface directly affect the valve's working efficiency and service life.

[0003] In related technologies, for wedge gate valves, the sealing surfaces are located on both sides of the wedge-shaped gate and form an angle with the center line of movement. That is, the two sealing surfaces of the valve disc are wedge-shaped. Typically, the angle between the sealing surfaces and the center line can be 2°52', 3°30', 5°, 8°, 10°, etc. For this type of gate valve, the sealing surfaces are more susceptible to angle changes due to minor surface defects, leading to reduced sealing performance. This is especially problematic in the high-radiation environment of the nuclear industry, where even minor defects in the valve disc sealing surface can pose serious safety hazards. However, the treatment of these minor defects typically involves manual grinding or simple CNC equipment for single-pass grinding repair. This grinding precision is limited, and real-time in-situ measurement of accuracy is not possible. The grinding quality and efficiency are insufficient to meet practical requirements. Summary of the Invention

[0004] The purpose of this application is to provide a processing device for valve disc sealing surfaces, which aims to improve the grinding accuracy and grinding efficiency of the sealing surfaces during the processing of gate valve discs.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] A processing apparatus for a valve disc sealing surface is provided, comprising:

[0007] frame;

[0008] The mounting mechanism is mounted on the frame and includes a clamping assembly for holding the valve disc.

[0009] A machining mechanism, mounted on a frame, includes a machining head for machining the sealing surface of a valve disc held in a clamping assembly.

[0010] The mounting mechanism further includes a first adjusting component and a second adjusting component. The first adjusting component is connected to the clamping component and is used to drive the clamping component to rotate around a first direction so that different sealing surfaces of the valve disc clamped on the clamping component move to face the machining head. The second adjusting component is connected to the clamping component and is used to rotate around a second direction to drive the clamping component to rotate so that different positions of the same sealing surface of the valve disc clamped on the clamping component face the machining head. The second direction is perpendicular to the first direction.

[0011] In some embodiments, the clamping assembly includes two clamping portions spaced apart along a first direction. The two clamping portions are respectively used to engage with the guide groove of the valve disc from opposite sides along the first direction. The first adjusting assembly includes two first rotary drives. One of the two first rotary drives is connected to one clamping portion and the other is connected to the other clamping portion. The two first rotary drives are used to drive the two clamping portions to rotate synchronously so that the valve disc rotates and switches different sealing surfaces facing the processing head.

[0012] In some embodiments, the clamping part includes two spaced-apart positioning blocks that are elastically connected so that the two positioning blocks can move closer or further apart to fit into the guide grooves of valve discs of different sizes.

[0013] In some embodiments, the clamping assembly further includes two connectors spaced apart along a first direction, two first rotary drive members are mounted on the two connectors in a one-to-one correspondence, and two clamping portions are mounted on the side of the corresponding first rotary drive member opposite to the connector in a one-to-one correspondence.

[0014] The clamping assembly also includes a zero-point chuck connected between the two connectors. The positioning part of the zero-point chuck is adapted to connect with the tail groove of the valve disc to lock the valve disc between the two connectors.

[0015] In some embodiments, the second adjustment component includes a turntable body, a supporting turntable, and a second rotary drive. The turntable body is mounted on a frame, the second rotary drive is mounted on the turntable body, and the drive end of the second rotary drive extends from the turntable body along a second direction. The supporting turntable is mounted on the drive end of the second rotary drive and has a support surface parallel to a first direction. A clamping component is mounted on the support surface, and the second rotary drive drives the supporting turntable to rotate around the second direction and drives the clamping component to rotate synchronously.

[0016] In some embodiments, the processing device for the valve disc sealing surface is further provided with a flushing head, which is mounted on the frame and used to provide flushing water to the valve disc for cooling and cleaning. The frame is also provided with a water collection tank located below the support turntable along the second direction. The water collection tank is arranged around the support turntable and used to collect flushing water.

[0017] The processing device for the valve disc sealing surface also includes a water collection system, with the outlet of the water collection tank connected to the inlet of the water collection system.

[0018] In some embodiments, the frame includes a load-bearing body and a support body disposed above the load-bearing body along a second direction, a support turntable is rotatably mounted on the support body, the turntable body is mounted on the load-bearing body, and a water collection tank is disposed on the support body.

[0019] In some embodiments, the water collection system includes a peristaltic pump, a filter, and a water collector, wherein the inlet of the peristaltic pump is connected to the outlet of the water collection tank, the outlet of the peristaltic pump is connected to the inlet of the filter, and the outlet of the filter is connected to the water collector.

[0020] In some embodiments, the outer surface of the supporting turntable is covered with a protective film, which is used to isolate nuclear radiation.

[0021] In some embodiments, the protective film is a laminated film composed of one or more of the following: silicone film, plastic film, aluminum film, metal and plastic composite film, and high-density metal composite film.

[0022] In some embodiments, the valve disc sealing surface processing device further includes a measuring head movably mounted on the frame. The measuring head is used to obtain defect information of the sealing surface of the valve disc held in the clamping assembly. The electric components of the first adjustment assembly and the second adjustment assembly are communicatively connected to the measuring head so that the first adjustment assembly and the second adjustment assembly can operate according to the defect information.

[0023] In some embodiments, the processing mechanism further includes a mounting plate mounted on the frame, a third adjustment component and at least three fourth adjustment components, the third adjustment component being mounted on the mounting plate, the drive end of the third adjustment component being mounted on a connecting plate, and the fourth adjustment components being mounted on the connecting plate.

[0024] The processing head includes a grinding head and a polishing head, and the grinding head, polishing head and measuring head are installed one-to-one on the drive end of three different fourth adjustment components;

[0025] The third adjustment component is used to drive the grinding head, polishing head and measuring head to reciprocate linear motion along the first direction, and the fourth adjustment component is used to drive the corresponding grinding head, polishing head or measuring head to reciprocate linear motion along the second direction.

[0026] The beneficial effects of the valve disc sealing surface processing device provided in this application are as follows: the installation mechanism of the processing device includes a clamping assembly, a first adjusting assembly, and a second adjusting assembly. The first adjusting assembly can drive the clamping assembly to rotate around a first direction, such as the vertical direction, thereby realizing the flipping of the valve disc. That is, the sealing surfaces on the two sides of the valve disc are automatically flipped and switched to face the processing head for processing, without the need for manual disassembly of the valve disc for flipping. The second adjusting assembly can drive the clamping assembly to rotate around a second direction perpendicular to the first direction, such as the horizontal direction, thereby realizing fine adjustment of the local position of the sealing surface. When there is a local defect on the sealing surface, the angle is finely adjusted by the second adjusting assembly so that the defect position faces the processing head, so that the processing head can perform point-to-point processing and repair. Thus, through the cooperation and coordinated operation of the first and second adjustment components, the valve disc can be moved during the repair process, greatly improving the repair efficiency of the valve disc sealing surface. At the same time, no manual operation such as moving the valve disc is required during the operation, which can effectively reduce the harm of nuclear radiation to the operators and eliminate random errors caused by manual operation (such as angle judgment deviation, uneven repair operation force, etc.), improve the repair quality of the sealing surface, and reduce the risk of valve leakage caused by human error. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of the structure of the processing device for the valve disc sealing surface provided in the embodiments of this application;

[0029] Figure 2 For valve disc installation at Figure 1 A view of the valve disc sealing surface machining device during installation.

[0030] Figure 3 For the valve disc to be clamped in Figure 1 A state view of the clamping assembly of the processing device for the valve disc sealing surface shown;

[0031] Figure 4 for Figure 2 Another perspective view of the structure shown;

[0032] Figure 5 for Figure 1 A schematic diagram of the machining mechanism of the device for machining the valve disc sealing surface;

[0033] Figure 6 for Figure 5 A partial structural schematic diagram of the processing mechanism shown;

[0034] Figure 7 for Figure 1 A schematic diagram of the water collection tank section of the frame of the processing device for the valve disc sealing surface shown;

[0035] Figure 8 For application Figure 1 The diagram shows the structure of the water collection system of the processing device for the valve disc sealing surface.

[0036] The following are the labeling elements in the figure:

[0037] 10. Frame; 11. Water collection tank; 111. Water baffle ring; 1111. Water collection space; 1112. Annular space; 1113. Water collection head; 12. Load-bearing main body; 13. Supporting main body; 14. Heavy-duty moving wheels; 15. Support column;

[0038] 20. Mounting mechanism; 21. Clamping assembly; 211. Clamping part; 2111. Positioning block; 212. Connector; 213. Zero-point chuck; 2131. Positioning part; 22. First adjustment assembly; 221. First rotary drive component; 23. Second adjustment assembly; 231. Turntable body; 232. Support turntable; 2321. Support surface; 2322. Water passage hole; 233. Second rotary drive component; 24. Pad;

[0039] 30. Machining mechanism; 31. Machining head; 33. Measuring head; 34. Mounting plate; 35. Third adjustment assembly; 351. Connecting plate; 36. Fourth adjustment assembly;

[0040] 40. Water collection system; 401. Trailer; 41. Peristaltic pump; 42. Filter; 43. Water collector; 44. Chiller;

[0041] 50. Control system;

[0042] 100. Valve disc; 1001. First disc; 1002. Second disc; 103. Guide groove; 104. Tail slide groove. Detailed Implementation

[0043] To make the technical problem to be solved, the technical solution and the beneficial effects of this application clearer, the following is in conjunction with the appendix. Figures 1 to 8 The present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

[0044] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0045] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, "multiple sets" means two or more sets, "multiple pieces" means two or more pieces, and "several" means one or more, unless otherwise explicitly specified.

[0047] Equipment and structures in nuclear power plants require regular maintenance. Gate valves, as core components for opening and closing pipelines, are widely used, and their sealing performance directly affects the sealing of the equipment. For example, nuclear-grade high-level radioactive gate valves, as key equipment in the containment barrier system of nuclear power plants, have valve disc sealing surface processing quality that directly affects the sealing performance and operational reliability of the equipment.

[0048] A gate valve is a type of valve that moves perpendicularly to the centerline of the flow path. Its valve disc moves vertically relative to the fluid within the valve seat in a straight line to cut off the flow path, thus closing the valve. Therefore, the seal between the valve disc and the valve seat directly affects the reliability of the valve's closure. In other words, the sealing surface of the valve disc is the core factor affecting the valve's sealing performance. Specifically, the sealing surface of the valve disc refers to the contact surface between the valve disc and the valve seat in a gate valve, used to ensure the valve's sealing performance and prevent fluid leakage. The quality and performance of the valve sealing surface directly affect the valve's operating efficiency and service life.

[0049] In related technologies, gate valves include parallel gate valves and wedge gate valves. For wedge gate valves, the sealing surfaces are located on both sides of the wedge-shaped gate and form an angle with the center line of movement, meaning the two sealing surfaces of the valve disc are wedge-shaped. Typically, the angle between the sealing surfaces and the center line can be 2°52', 3°30', 5°, 8°, or 10°. For this type of gate valve, the sealing surfaces are more susceptible to angle changes due to minor surface defects, leading to reduced sealing performance. This is especially problematic in the high-radiation environment of the nuclear industry, where even minor defects in the valve disc sealing surface can pose serious safety hazards. However, the treatment of these minor defects typically involves manual grinding, which has limited precision and low efficiency. Alternatively, simple CNC equipment can be used for single-pass grinding. However, this single-processing method disconnects the surface measurement and repair stages of the sealing surface, making real-time in-situ measurement of precision impossible. This makes it difficult to effectively control processing accuracy and achieve precise surface repair, resulting in grinding quality and efficiency that fail to meet practical requirements.

[0050] Based on this, embodiments of this application provide a processing apparatus for valve disc sealing surfaces to solve the above-mentioned problems.

[0051] Please refer to the following: Figures 1 to 8 The valve disc sealing surface processing device provided in this application embodiment is applicable, but not limited to, for grinding and repairing the sealing surface of the valve disc of a gate valve during the maintenance of equipment in a nuclear power plant, so that the valve's sealing performance can meet operational requirements. In this application embodiment, the first direction is the direction shown by arrow F1 in the figure, and the second direction is the direction shown by arrow F2 in the figure.

[0052] In the embodiments of this application, such as Figures 1 to 8 As shown, the valve disc sealing surface processing device includes a frame 10, a mounting mechanism 20 mounted on the frame 10, and a processing mechanism 30. The mounting mechanism 20 includes a clamping assembly 21 for clamping the valve disc 100. The processing mechanism 30 includes a processing head 31 for processing the sealing surface of the valve disc 100 clamped in the clamping assembly 21. The mounting mechanism 20 also includes a first adjusting assembly 22 and a second adjusting assembly 23. The first adjusting assembly 22 is connected to the clamping assembly 21 and is used to drive the clamping assembly 21 to rotate around a first direction so that different sealing surfaces of the valve disc 100 clamped in the clamping assembly 21 move to face the processing head 31. The second adjusting assembly 23 is connected to the clamping assembly 21 and is used to rotate around a second direction to drive the clamping assembly 21 to rotate so that different positions of the same sealing surface of the valve disc 100 clamped in the clamping assembly 21 face the processing head 31. The second direction is perpendicular to the first direction.

[0053] In this embodiment, the processing apparatus includes a frame 10, which serves as a basic support component, providing rigid support for the mounting mechanism 20 and the processing mechanism 30. For example, it can typically be a frame structure made of high-strength aluminum alloy or cast iron. Exemplarily, the frame 10 can be a gantry frame, etc. The processing mechanism 30 can be mounted on the crossbeam of the gantry frame, and the mounting mechanism 20 is located in the space below the crossbeam, so that when the clamping assembly 21 clamps the valve disc 100, the sealing surface of the valve disc 100 can face the processing head 31 of the processing mechanism 30 from below.

[0054] The valve disc sealing surface processing device of this application embodiment further includes a processing mechanism 30, which is mounted on the frame 10. It includes a processing head 31, which is an execution component of the processing head and is used to perform mechanical processing such as grinding and polishing on the sealing surface. The processing head 31 can be a grinding head, a polishing head, etc. The processing mechanism 30 can include one or more processing heads 31. When multiple processing heads 31 are included, the multiple processing heads 31 can have multiple different drives or the same drive. The switching of processing heads 31 is realized by a tool changing structure.

[0055] The valve disc sealing surface processing device of this application embodiment further includes a mounting mechanism 20, which is mounted on the frame 10. The mounting mechanism 20 includes a clamping component 21, a first adjusting component 22, and a second adjusting component 23. The clamping component 21 is used to clamp and fix the valve disc 100. For example, the clamping component 21 can clamp and fix the valve disc 100 using structures such as jaws or pressure plates. The first adjusting component 22 is used to drive the clamping component 21, i.e., the valve disc 100, to rotate around a first direction, i.e., along the rotation direction indicated by arrow F' in the figure. When the valve disc 100 is a wedge-shaped gate, its two sealing surfaces form an angle (e.g., 5°) with the center line. The first adjusting component 22 can drive the clamping component 21 to rotate 180°, so that the left sealing surface and the right sealing surface are sequentially aligned with the processing head 31, thus achieving automatic flipping of the valve disc 100 without manual flipping, improving efficiency and reducing clamping errors. Based on this, a second adjustment component 23 is set to drive the clamping component 21, i.e., the valve disc 100, to rotate around a second direction, i.e., along the rotation direction indicated by arrow F'' in the figure. The second direction is perpendicular to the first direction. For example, the second direction is the vertical direction. When the clamping component 21 rotates by an angle θ around the vertical axis, a point P on the sealing surface will be moved to face the machining head 31 through a rotation matrix transformation. For example, when there is a local pit on the sealing surface, the angle is finely adjusted by the second adjustment component 23 so that the pit faces the machining head 31, thereby achieving fixed-point machining.

[0056] Thus, the valve disc sealing surface processing device provided in this application embodiment includes a mounting mechanism 20 comprising a clamping assembly 21, a first adjusting assembly 22, and a second adjusting assembly 23. The first adjusting assembly 22 can drive the clamping assembly 21 to rotate around a first direction, such as a vertical direction, thereby realizing the flipping of the valve disc 100. That is, the sealing surfaces located on the two sides of the valve disc 100 are automatically flipped and switched to face the processing head 31 for processing, without the need for manual disassembly of the valve disc 100 for flipping. The second adjusting assembly 23 can drive the clamping assembly 21 to rotate around a second direction perpendicular to the first direction, such as a horizontal direction, thereby realizing fine adjustment of the local position of the sealing surface. When there is a local defect on the sealing surface, the angle is finely adjusted by the second adjusting assembly 23 so that the defect position faces the processing head 31, so that the processing head 31 can perform point-to-point processing and repair. Thus, through the cooperation and coordinated operation of the first adjustment component 22 and the second adjustment component 23, the position of the valve disc 100 can be moved during the repair process, which greatly improves the repair efficiency of the valve disc sealing surface. At the same time, no manual operation such as moving the valve disc 100 is required during the operation, which can effectively reduce the harm of nuclear radiation to the operators and eliminate random errors caused by manual operation (such as angle judgment deviation, uneven repair operation force, etc.), improve the repair quality of the sealing surface, and reduce the risk of valve leakage caused by human error.

[0057] Understandably, such as Figures 2 to 4 As shown, for a wedge gate valve, its valve disc 100 has a first disc 1001 and a second disc 1002. The edges of the first disc 1001 and the second disc 1002 abut and connect to form a single integral part. The first disc 1001 and the second disc 1002 are arranged at approximately an included angle with the point where they are connected as the vertex, so that the two surfaces of the first disc 1001 and the second disc 1002 are arranged at an included angle. That is, one of the two sealing surfaces is located on the surface of the first disc 1001 facing away from the second disc 1002, and the other is located on the surface of the second disc 1002 facing away from the first disc 1001. There is an included angle between the two sealing surfaces, and the angle between the two sealing surfaces and the center line of the included angle can be 2°52', 3°30', 5°, 8°, 10°, etc. Thus, a guide groove 103 is formed between the first disk 1001 and the second disk 1002, and a tail groove 104 is formed at the position where the first disk 1001 and the second disk 1002 abut. When processing the sealing surface of the valve disc 100, the valve disc 100 can be fixed by the guide groove 103 and / or the tail groove 104.

[0058] In some embodiments, such as Figures 2 to 4As shown, the clamping assembly 21 includes two clamping parts 211 spaced apart along a first direction. The two clamping parts 211 are respectively used to clamp into the guide groove 103 of the valve disc 100 from opposite sides along the first direction. The first adjusting assembly 22 includes two first rotary driving members 221. One of the two first rotary driving members 221 is connected to one clamping part 211 and the other is connected to the other clamping part 211. The two first rotary driving members 221 are used to drive the two clamping parts 211 to rotate synchronously so that the valve disc 100 rotates and switches different sealing surfaces facing the processing head 31.

[0059] In this embodiment, the clamping assembly 21 includes two clamping portions 211, which are spaced apart along a first direction and form a structure similar to a "clamp". Each clamping portion 211 can be designed as a structure such as a claw, a protrusion, or a pin, and its size is adapted to the guide groove 103 of the valve disc 100. One clamping portion 211 is inserted into the guide groove 103 from one side of the valve disc 100 along the first direction, and the other clamping portion 211 is inserted into the guide groove 103 from the other side of the valve disc 100 along the first direction, thereby clamping the valve disc 100 from both sides.

[0060] Based on this, the clamping assembly 21 also includes two first rotary drive members 221. The two first rotary drive members 221 are respectively connected to the clamping parts 211 on both sides. When the drive needs to flip the valve disc 100 to switch the sealing surface of the valve disc 100, the two first rotary drive members 221 drive the corresponding clamping parts 211 to rotate synchronously by 180°, causing the valve disc 100 to flip around the axis in the first direction, so that the sealing surface that was originally facing away from the processing head 31 is flipped to face the processing head 31, realizing the automatic flipping and switching of the valve disc sealing surface. Furthermore, by controlling the rotation angle of the drive members driving the clamping parts 211, the flipping angle of the valve disc 100 can be accurately obtained, so that the position between the sealing surface of the valve disc 100 and the processing head 31 can meet the processing requirements.

[0061] For example, both the first rotary drive component 221 and the second rotary drive component 233 can be high-precision servo motors. A roller cam structure can be used for transmission between them and the corresponding clamping part 211, and a fully closed-loop control circuit is formed through an absolute circular grating. The processing device for the valve disc sealing surface also includes a control system 50, such as a human-machine interface or an electrical control cabinet. The first rotary drive component 221 and the second rotary drive component 233 form a fully closed-loop control circuit with the control system 50 through the absolute circular grating. The absolute circular grating is a high-precision sensor used for angle measurement.

[0062] In some embodiments, such as Figures 2 to 4As shown, the clamping part 211 includes two spaced positioning blocks 2111, which are elastically connected so that the two positioning blocks 2111 can move closer or further away from each other to fit into the guide groove 103 of the valve disc 100 of different sizes.

[0063] The clamping part 211 includes two positioning blocks 2111, which are arranged at intervals to form a structure similar to an elastic gripper. The two positioning blocks 2111 are connected by a spring (such as a disc spring assembly) or an elastic body (such as a rubber buffer block). When the clamping part 211 needs to be inserted into the guide groove 103 of the valve disc 100, in the initial state, the distance between the two positioning blocks 2111 is slightly larger than the width of the guide groove 103 (such as a groove width of 10 mm and a distance between the positioning blocks 2111 of 10.2 mm). When the clamping part 211 moves toward the valve disc 100, the positioning blocks 2111 are squeezed inward by the groove wall until they are completely inserted into the groove. After being inserted, the elastic force makes the two positioning blocks 2111 keep against the two sides of the guide groove 103 with a constant pressure, thereby realizing the clamping and fixing of the valve disc 100.

[0064] Furthermore, in this embodiment, the interval between the two positioning blocks 2111 is adjustable. When the width of the guide groove 103 of the valve disc 100 changes, the positioning blocks 2111 can automatically adjust the spacing to maintain a tight fit with the groove wall, so as to adapt to valve discs 100 of different specifications. It is flexible and convenient to use, and has good versatility and universality. There is no need to set different clamping components 21 for different valve discs 100.

[0065] In some embodiments, such as Figure 1 , Figure 2 and Figure 4 As shown, the clamping assembly 21 also includes two connectors 212 spaced apart along a first direction, two first rotary drive members 221 are installed on the two connectors 212 in a one-to-one correspondence, and two clamping parts 211 are installed on the side of the corresponding first rotary drive member 221 facing away from the connector 212 in a one-to-one correspondence; the clamping assembly 21 also includes a zero-point chuck 213 connected between the two connectors 212, and the positioning part 2131 of the zero-point chuck 213 is used to be adapted to connect with the tail slide groove 104 of the valve disc 100 to lock the valve disc 100 between the two connectors 212.

[0066] In this embodiment, two clamping parts 211 are respectively installed on two connecting parts 212, and the valve disc 100 is fixed at the position between the two connecting parts 212. The clamping assembly 21 also includes a zero-point chuck 213, which is disposed between the two connecting parts 212 and is used to adapt and connect with the tail slide groove 104 of the valve disc 100, so that after the first rotary drive 221 completes the flipping drive, the valve disc 100 is locked between the two connecting parts 212, so that the valve disc 100 will not shake during the processing. Thus, the clamping part 211 achieves circumferential (around the first direction) positioning of the valve disc 100 by engaging the guide groove 103 of the valve disc 100, and the zero-point chuck 213 achieves axial and radial positioning of the valve disc 100 by connecting the tail slide groove 104 of the valve disc 100. In this way, when the first rotary drive member 221 and the second rotary drive member 233 are not in motion, the zero-point chuck 213 and the two clamping parts 211 form a fully constrained clamping, eliminating the degree of freedom of the valve disc 100, thereby enabling the valve disc 100 to maintain a high degree of positional stability so that its sealing surface contacts the processing head 31.

[0067] The zero-point chuck 213 is a high-precision mechanical positioning and locking device that enables rapid positioning and clamping of workpieces through a standardized interface. In this embodiment, the positioning part 2131 of the zero-point chuck 213 can cooperate with the tail slide groove 104 of the valve disc 100. During positioning, the positioning part 2131 is inserted into the tail slide groove 104. Subsequently, the piston inside the chuck is driven by hydraulic or pneumatic pressure within the body of the zero-point chuck 213, causing the positioning part 2131 to expand and lock the valve disc 100, ensuring that the valve disc 100 does not shift during processing. The zero-point chuck 213 establishes a mechanical zero point for clamping the valve disc 100 through the cooperation of the positioning part 2131 and the tail slide groove 104, ensuring that the repeatability of positioning for each clamping is ≤0.005mm, thus meeting the accuracy requirements for clamping and positioning the valve disc 100.

[0068] In some embodiments, such as Figure 1 , Figure 2 and Figure 4 As shown, the second adjustment component 23 includes a turntable body 231, a supporting turntable 232, and a second rotary drive component 233. The turntable body 231 is mounted on the frame 10, and the second rotary drive component 233 is mounted on the turntable body 231. The drive end of the second rotary drive component 233 extends from the turntable body 231 along a second direction. The supporting turntable 232 is mounted on the drive end of the second rotary drive component 233. The supporting turntable 232 has a support surface 2321 parallel to the first direction. The clamping component 21 is mounted on the support surface 2321. The second rotary drive component 233 drives the supporting turntable 232 to rotate around the second direction and drives the clamping component 21 to rotate synchronously.

[0069] In this embodiment, the second adjustment component 23 includes a turntable body 231, which is fixed to the frame 10 and serves as the base of the second adjustment component 23, providing basic support and installation reference for other structures. A second rotary drive component 233 is installed inside the turntable body 231. The drive end of the second rotary drive component 233 extends from the turntable body 231 and is installed on the support turntable 232. The clamping component 21 is installed on the mounting surface of the support turntable 232. That is, the clamping component 21, the valve disc 100, and the first adjustment component 22 are all installed on the support turntable 232. Thus, the second adjustment component 23, the clamping component 21, and the first adjustment component 22 form an integral part, which can be disassembled, transported, and stored separately.

[0070] In use, when it is necessary to adjust the different positions of the sealing surface to face the processing head 31, the first rotary drive 221 is turned off and the second rotary drive 233 is started to drive the support turntable 232 to rotate. The sealing surface rotates about the second direction as the axis and rotates relative to the processing head 31 so that its different positions are switched to face the processing head 31.

[0071] It can be understood that the second rotary drive component 233 can be a servo motor, or a combination of a servo motor and a reducer, or a hydraulic motor, etc., as long as it can meet the control of rotation accuracy.

[0072] In a specific embodiment, two pads 24 are also provided at intervals along the first direction on the support turntable 232. Two connectors 212 are respectively installed on the two pads 24. The pads 24 support the connectors 212 and the clamping assembly 21, so that there is sufficient space between the clamping part 211 and the support surface 2321 of the support turntable 232 along the second direction, providing rotation space for the valve disc 100 to flip.

[0073] In some embodiments, such as Figure 1 and Figure 5 As shown, the processing device for the valve disc sealing surface also includes a measuring head 33 that is movably mounted on the frame 10. The measuring head 33 is used to obtain defect information of the sealing surface of the valve disc 100 held in the clamping assembly 21. The electric components of the first adjustment assembly 22 and the second adjustment assembly 23 are communicatively connected to the measuring head 33 so that the first adjustment assembly 22 and the second adjustment assembly 23 can operate according to the defect information.

[0074] In this embodiment, a measuring head 33 is also provided on the frame 10. The measuring head 33 is movably mounted on the frame 10. For example, the measuring head 33 can be mounted on the frame 10 via a linear module or a robotic arm. It can move along one or more of the three-dimensional axes to cover the full size range of the valve disc 100 and collect parameter information of the sealing surface of the valve disc 100 within the full size range. The measuring head 33 can be a measurement module using contact sampling. The measuring head 33 can include a measuring probe that contacts the sealing surface along a preset path, recording coordinates at each contact to generate the contour information of the sealing surface, thereby obtaining the defect information of the sealing surface. Alternatively, the measuring head 33 can also be a non-contact measurement module that emits a laser beam toward the sealing surface. The laser beam scans the sealing surface, generating point cloud data of the sealing surface contour, which is then processed by filtering algorithms to obtain the defect information of the sealing surface.

[0075] In this embodiment, the electric components of the first adjustment component 22 and the second adjustment component 23 are communicatively connected to the measuring head 33, enabling the first adjustment component 22 and the second adjustment component 23 to operate according to the defect information. Exemplarily, the processing device for the valve disc sealing surface also includes a control system 50, such as a human-machine interface or an electrical control cabinet. The measuring head 33, the electric components of the first rotary drive component 221, and the electric components of the second rotary drive component 233 are all communicatively connected to the control system 50. The measuring head 33 feeds back the acquired defect information to the control system 50. The control system 50 generates control specifications based on the defect information and transmits them to the electric components of the first rotary drive component 221 or the second rotary drive component 233, thereby controlling the corresponding drive component to operate and achieving intelligent movement control of the valve disc 100.

[0076] In some embodiments, such as Figure 1 , Figure 5 and Figure 6 As shown, the processing mechanism 30 also includes a mounting plate 34 mounted on the frame 10, a third adjustment component 35, and at least three fourth adjustment components 36. The third adjustment component 35 is mounted on the mounting plate 34, and a connecting plate 351 is mounted on the drive end of the third adjustment component 35. The fourth adjustment components 36 are mounted on the connecting plate 351. The processing head 31 includes a grinding head and a polishing head. The grinding head, polishing head, and measuring head 33 are mounted one-to-one on the drive ends of three different fourth adjustment components 36. The third adjustment component 35 is used to drive the grinding head, polishing head, and measuring head 33 to reciprocate linearly along a first direction. The fourth adjustment components 36 are used to drive the corresponding grinding head, polishing head, or measuring head 33 to reciprocate linearly along a second direction.

[0077] Understandably, in related technologies, the processing and repair of the valve disc sealing surface of a gate valve typically requires multiple steps such as grinding and polishing. Furthermore, the dimensions of the sealing surface need to be measured during processing. In traditional processing methods, the grinding head, polishing head, and measuring head 33 are often independently configured, requiring manual or complex mechanical switching, which is not only inefficient but also makes it difficult to guarantee processing accuracy. In addition, the adjustment components of the traditional processing mechanism 30 lack sufficient precision to meet the high-precision processing requirements of the valve disc sealing surface.

[0078] Based on this, in this embodiment, the processing mechanism 30 is mounted on the frame 10. The processing mechanism 30 includes a mounting plate 34, a third adjustment component 35, a connecting plate 351, and a processing head 31. The mounting plate 34 is fixedly mounted on the frame 10, serving as the basic support component of the entire processing mechanism 30. It can be made of high-strength aluminum alloy material, possessing sufficient rigidity and stability to withstand the cutting force and vibration generated during processing. The third adjustment component 35 is a linear drive mechanism, which can adopt a linear module or chain drive structure, etc. The third adjustment component 35 is mounted on the mounting plate 34. The drive end of the third adjustment component 35 is connected to the connecting plate 351, thereby driving the connecting plate 351 to reciprocate linearly along the first direction. The movement of the connecting plate 351 simultaneously drives the processing head 31 and measuring head 33 mounted on it to move synchronously, thereby adjusting the relative positions of the measuring head 33 and processing head 31 with the sealing surface from the first direction.

[0079] Based on this, the processing mechanism 30 also includes multiple fourth adjustment components 36, such as four fourth adjustment components 36. The fourth adjustment components 36 are mounted on the mounting plate 34. The processing head 31 includes a grinding head and a polishing head. The grinding head, polishing head, and measuring head 33 are respectively mounted on the drive ends of three different fourth adjustment components 36. Each fourth adjustment component 36 can drive the corresponding grinding head, polishing head, or measuring head 33 to reciprocate linearly along the second direction, thereby adjusting the relative position between the measuring head 33 and each processing head 31 and the sealing surface from the second direction. Among them, the fourth adjustment components 36 are all linear drive mechanisms, such as linear modules, i.e., a combination drive structure of servo motor and ball screw.

[0080] The processing head 31 includes a grinding head and a polishing head. The grinding head uses a high-speed rotating grinding wheel to grind the sealing surface of the gate valve disc. The speed of the grinding wheel can be adjusted according to the processing requirements. The polishing head uses a flexible polishing wheel and polishes the ground sealing surface with polishing paste to improve the surface finish of the sealing surface.

[0081] In this embodiment, when the valve disc sealing surface of the gate valve needs to be processed, the valve disc 100 is first clamped between the two clamping parts 211, and then the first rotary drive 221 is activated to adjust the angle of the valve disc 100 so that the defective sealing surface is rotated to face the measuring head 33. Then, the zero-point chuck 213 is connected to the tail slide groove 104 of the valve disc 100 so that the valve disc 100 is fixed between the two connecting parts 212. The measuring head 33 is activated and moves along the second direction or the first direction to obtain the contour information of the sealing surface and confirm the defect information of the defective part. The defect information is then transmitted to the control system 50. After acquiring the information, the control system 50 drives the second rotary drive component 233 to rotate and move the valve disc 100 to the position of the damaged part directly opposite the grinding head in the processing head 31. The third adjustment component 35 drives the connecting plate 351 to move along the first direction, moving the grinding head, which needs to be worked, above the valve disc sealing surface. Then, the corresponding fourth adjustment component 36 drives the grinding head to move downward along the second direction, bringing it into contact with the sealing surface to begin grinding. During grinding, the third adjustment component 35 can control the speed and stroke of the grinding head in the first direction according to the processing requirements to achieve uniform grinding of the sealing surface. After grinding, the third adjustment component 35 removes the grinding head, and the polishing head is moved above the sealing surface. The corresponding fourth adjustment component 36 drives the polishing head in the processing head 31 to move downward along the second direction, bringing the polishing wheel into contact with the sealing surface for polishing. During polishing, the uniformity of polishing and the surface finish can also be ensured through the coordinated control of the third adjustment component 35 and the fourth adjustment component 36. During processing, the measuring head 33 can be moved above the sealing surface via the third adjusting component 35, and driven downward along the second direction by the fourth adjusting component 36 to measure the dimensions of the sealing surface in real time. The measurement data can be fed back to the control system 50 for timely adjustment of processing parameters to ensure processing accuracy. Thus, the first rotary drive component 221, the second rotary drive component 233, the third adjusting component 35, and the three fourth adjusting components 36 form a six-axis drive system mounted on the frame 10. The six axes cooperate and work together to repair the valve disc sealing surface.

[0082] Understandably, in specific embodiments, both the third adjustment component 35 and the fourth adjustment component 36 can be driven by servo motors and ball screw drives. Simultaneously, the processing device for the valve disc sealing surface also includes a control system 50, such as a human-machine interface or an electrical control cabinet. The third adjustment component 35 and the fourth adjustment component 36 can form a fully closed-loop control circuit with the control system 50 through nanometer-scale linear gratings. A linear grating is an optical element used for precise displacement measurement; its core function is to convert mechanical displacement into electrical signals, thereby achieving high-precision position detection.

[0083] In a specific embodiment, a custom-made diamond polishing head can be selected, using synthetic diamond as the abrasive and resin as the binder. The corresponding fourth adjustment component 36 drives the polishing head to contact the sealing surface. The polishing head can perform constant-force polishing. Simultaneously, based on the contour information data of the sealing surface collected by the measuring head 33 and the Preston ultra-precision polishing material removal model, the rotation speed of the turntable spindle is adjusted. The dwell time at different points on the sealing surface controls the amount of material removed. The Preston ultra-precision polishing material removal model is MRR. N = K*p*r n Among them, MRR N Let p be the material removal rate at point N on the component, p be the pressure at point N on the component, and r be the pressure. n Let N be the velocity of point N on the component relative to the polishing head, and K be the Preston coefficient.

[0084] In a specific embodiment, such as Figure 1 and Figure 7 As shown, the frame 10 is also provided with two support columns 15 at intervals along the first direction. The support columns 15 are installed vertically on the surface of the bearing body 12 facing the support turntable 232 along the second direction. The opposite ends of the mounting plate 34 are fixedly connected to the ends of the two support columns 15 that are away from the support turntable 232. The mounting plate 34 and the two support columns 15 form a structure similar to a "gantry". The mounting plate 34 is a crossbeam and the support columns 15 are columns. The third adjustment component 35, the fourth adjustment component 36 and the corresponding processing head 31, measuring head 33, etc. are all installed on the crossbeam of the "gantry" structure.

[0085] In some embodiments, such as Figure 1 , Figure 2 and Figure 7 As shown, the processing device for the valve disc sealing surface is also equipped with a flushing head (not shown). The flushing head is installed on the frame 10 and is used to provide flushing water to the valve disc 100 to cool and clean the valve disc 100. The frame 10 is also equipped with a water collection tank 11 located below the support turntable 232 along the second direction. The water collection tank 11 is arranged around the support turntable 232 and is used to collect flushing water. The processing device for the valve disc sealing surface also includes a water collection system 40. The outlet of the water collection tank 11 is connected to the inlet of the water collection system 40.

[0086] In this embodiment, by providing a flushing head on the frame 10, when the processing head 31 is repairing the sealing surface, the flushing head provides flushing water to the valve disc 100, reducing the temperature of the valve disc 100 while flushing away the waste chips that fall off during grinding. Furthermore, a water collection tank 11 is provided below the supporting turntable 232. The flushing water carrying the waste chips is collected in the water collection tank 11 and then transported to the water collection system 40, which can centrally treat and dispose of the flushing water.

[0087] In a specific embodiment, such as Figure 1 , Figure 2 and Figure 7 As shown, the frame 10 includes a load-bearing body 12 and a support body 13 disposed above the load-bearing body 12 along the second direction. The support turntable 232 is rotatably mounted on the support body 13, the turntable body 231 is mounted on the load-bearing body 12, and the water collection tank 11 is disposed on the support body 13.

[0088] Thus, the carrier body 12 and the support body 13 are spaced apart, and the water collection tank 11 is located on the support body 13 and surrounds the support turntable 232. The flushing water flowing down from the support turntable 232 enters the water collection tank 11 and is completely collected. It will not flow downward to contact the carrier body 12, nor will it contact any components other than the support turntable 232. In particular, it will not contact the carrier body 12 below the support turntable 232, nor the turntable body 231 installed on the carrier body 12. This reduces the radiation impact of the flushing water carrying nuclear waste on the carrier body 12, the turntable body 231, and the second rotating drive component 233, and extends the service life of these components.

[0089] In a specific embodiment, such as Figure 7 As shown, a water-retaining ring 111 is provided inside the water collection tank 11, surrounding the supporting body 13. The flushing water first enters the water collection space 1111 defined by the water-retaining ring 111. When the space inside the water-retaining ring 111 is full, water can overflow from the water-retaining ring 111 to the annular space 1112 between the tank wall of the water collection tank 11 and the water-retaining ring 111. Thus, the water-retaining ring 111 and the tank wall of the water collection tank 11 form a secondary water collection system, thereby reducing the risk of flushing water overflow. Simultaneously, a transparent observation window is provided on the side wall of the water collection tank 11, allowing observation of the water collection status within the tank 11, further reducing the risk of flushing water overflow.

[0090] In a specific embodiment, such as Figure 1 , Figure 2 and Figure 7 As shown, a water passage hole 2322 is provided at the center of the support turntable 232. When the valve disc 100 is clamped by the clamping assembly 21, the water passage hole 2322 is located below the valve disc 100 along the second direction. The water passage hole 2322 is connected to the water collection space 1111. In this way, the flushing water can quickly flow into the water collection space 1111 through the water passage hole 2322.

[0091] In a specific embodiment, the four bottom corners of the supporting body 12 are also provided with heavy-duty moving wheels 14 and fixed feet (not shown). The moving wheels enable the entire processing device to move a short distance, while the fixed feet can lift the supporting body 12, so that a certain gap is formed between the supporting body 12 and the ground, and forklifts or hydraulic trolleys can be inserted into the gap to lift and move the entire processing device.

[0092] In some embodiments, such as Figure 1 , Figure 7 and Figure 8 As shown, the water collection system 40 includes a peristaltic pump 41, a filter 42, and a water collector 43. The inlet of the peristaltic pump 41 is connected to the outlet of the water collection tank 11, the outlet of the peristaltic pump 41 is connected to the inlet of the filter 42, and the outlet of the filter 42 is connected to the water collector 43.

[0093] The system employs a peristaltic pump 41 to draw and collect flushing water. The flushing water bypasses the pump body and flows only through the flexible hose of the peristaltic pump 41. Regularly replacing the hose effectively prevents debris from accumulating inside the pump body, reducing the risk of nuclear contamination. Furthermore, the water collection system 40 is equipped with a filter 42. The flushing water discharged from the peristaltic pump 41 enters the filter 42, where it traps debris. Wastewater flows out of the outlet of the filter 42 and into the water collector 43 for temporary storage. This separation of water and debris allows for the separate treatment of both wastewater and debris.

[0094] In a specific embodiment, such as Figure 7 As shown, the internal space of the water-retaining ring 111, i.e., the water collection space 1111, is also equipped with multiple water collection heads 1113 arranged in an array. The water collection heads 1113 are connected to the peristaltic pump 41 through pipelines, so that the peristaltic pump 41 can quickly draw and collect flushing water through multiple water collection heads 1113, accelerating the collection and discharge of flushing water and reducing the risk of blockage and nuclear contamination. Pressure sensors and flow sensors are also installed on the water collection heads 1113 to monitor the water volume and water pressure of the flushing water in real time.

[0095] In a specific embodiment, such as Figure 8 As shown, the water collection system 40 may also include a trailer 401, with the peristaltic pump 41, filter 42, and water collector 43 centrally mounted on the trailer 401 for easy overall movement and transport. The trailer 401 is also equipped with a chiller 44, which is connected to the flushing head pipeline to provide flushing water for the flushing head.

[0096] In some embodiments, the outer surface of the support turntable 232 is covered with a protective film (not shown). The protective film is used to isolate nuclear radiation, thereby reducing the adverse effects of nuclear radiation on the support turntable 232 and extending the service life of the support turntable 232.

[0097] In specific embodiments, the protective film can be any one of silicone film, plastic film, aluminum film, metal-plastic composite film, or high-density metal composite film. Alternatively, the protective film can be a laminated film composed of multiple of these materials. A laminated film refers to a layered film structure formed by sequentially stacking multiple different films, such as a laminated film structure of aluminum film and silicone film, or a laminated film structure of aluminum film and plastic film.

[0098] The valve disc sealing surface processing apparatus of this application embodiment utilizes a six-axis drive control system for precise coordinated control, enabling accurate execution of complex processing paths. The integrated system for double-sided processing and measurement of the valve disc sealing surface integrates real-time monitoring of the entire processing and measurement process, possessing high-speed precision and adaptive adjustment capabilities. The integrated cooling and purification system ensures the safe recycling and reuse of wastewater and waste materials, guaranteeing the stability of the processing environment. The integrated control system, including a human-machine interface, provides precise process control and data management. Furthermore, the equipment incorporates radiation protection design for the special environment of the nuclear industry, such as covering the surfaces of key components with protective films, greatly improving the reliability and applicability of the device. This provides a highly efficient, intelligent, and safe comprehensive solution for the precision repair processing of valve disc sealing surfaces.

[0099] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0100] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A valve seat face machining apparatus characterized by comprising: The valve seat sealing surface processing device comprises a rack, a mounting mechanism mounted on the rack, the mounting mechanism comprising a clamping assembly for clamping a valve disc, a processing mechanism mounted on the rack, the processing mechanism comprising a processing head for processing a sealing surface of the valve disc clamped on the clamping assembly, wherein the mounting mechanism further comprises a first adjusting assembly and a second adjusting assembly, the first adjusting assembly being connected with the clamping assembly and used for driving the clamping assembly to rotate around a first direction so as to move different sealing surfaces of the valve disc clamped on the clamping assembly to be opposite to the processing head, the second adjusting assembly being connected with the first adjusting assembly and used for driving the clamping assembly to rotate around a second direction so as to make different positions of a same sealing surface of the valve disc clamped on the clamping assembly to be opposite to the processing head, the second direction being perpendicular to the first direction. The clamping assembly comprises two clamping parts arranged at intervals along the first direction, the two clamping parts being respectively used for clamping into guide grooves of the valve disc from opposite sides along the first direction, the first adjusting assembly comprising two first rotary driving members, one of the two first rotary driving members being connected with one of the clamping parts and the other of the two first rotary driving members being connected with the other of the clamping parts, the two first rotary driving members being used for driving the two clamping parts to rotate synchronously so as to rotate the valve disc and switch different sealing surfaces to be opposite to the processing head. The clamping assembly further comprises two connecting members arranged at intervals along the first direction, the two first rotary driving members being installed on the two connecting members one by one. The clamping assembly further comprises a zero-point chuck connected between the two connecting members, a positioning part of the zero-point chuck being used for adaptively connecting with a tail sliding groove of the valve disc so as to lock the valve disc between the two connecting members. The clamping part comprises two positioning blocks arranged at intervals, the two positioning blocks being elastically connected so as to be able to approach or move away from each other to adaptively clamp into guide grooves of the valve disc of different sizes. The second adjusting assembly comprises a rotary table main body, a support rotary table and a second rotary driving member, the rotary table main body being installed on the rack, the second rotary driving member being installed on the rotary table main body, a driving end of the second rotary driving member extending from the rotary table main body along the second direction, the support rotary table being installed on a driving end of the first rotary driving member, the support rotary table having a support surface parallel to the first direction, the clamping assembly being installed on the support surface, the second rotary driving member driving the support rotary table to rotate around the second direction and driving the clamping assembly to rotate synchronously. The valve seat sealing surface processing device further comprises a flushing head, the flushing head being installed on the rack and used for providing flushing water to the valve disc to cool and clean the valve disc, the rack further comprising a water collecting groove located below the support rotary table along the second direction, the water collecting groove being arranged around the support rotary table and used for collecting the flushing water. ​ 2. The valve seat sealing surface machining apparatus according to claim 1, characterized by ​ 3. A device for machining a sealing surface of a valve disc according to claim 1 or 2, characterized in that ​ 4. The valve seat sealing surface machining apparatus according to claim 3, wherein ​ The machining device of the valve clack sealing surface further comprises a water collecting system, and a water outlet of the water collecting tank is communicated with a water inlet of the water collecting system.

5. The valve seat sealing surface machining apparatus according to claim 4, wherein The rack comprises a bearing body and a supporting body arranged above the bearing body along the second direction, the supporting turntable is rotatably mounted on the supporting body, the turntable body is mounted on the bearing body, and the water collecting tank is arranged on the supporting body.

6. The apparatus for machining a valve seat surface of claim 4 wherein, The water collecting system comprises a peristaltic pump, a filter and a water collector, a water inlet of the peristaltic pump is connected with a water outlet of the water collecting tank, a water outlet of the peristaltic pump is communicated with a water inlet of the filter, and a water outlet of the filter is communicated with the water collector.

7. The apparatus for machining a valve seat surface of claim 3 wherein, An outer surface of the supporting turntable is covered with a protective film, and the protective film is used for isolating nuclear radiation.

8. The apparatus for machining a valve seat surface of claim 7 wherein, The protective film is a laminated film composed of one or more of a silica gel film, a plastic film, a metal aluminum film and a composite film of metal and plastic.

9. The apparatus for machining a valve seat surface of claim 1 or 2, wherein, The machining device of the valve clack sealing surface further comprises a movable measuring head mounted on the rack, the measuring head is used for acquiring defect information of a sealing surface of the valve clack clamped on the clamping assembly, and electric parts of the first adjusting assembly and the second adjusting assembly are communicatively connected with the measuring head, so that the first adjusting assembly and the second adjusting assembly can act according to the defect information.

10. The apparatus for machining a valve seat surface of claim 9, wherein, The machining mechanism further comprises a mounting plate mounted on the rack, a third adjusting assembly and at least three fourth adjusting assemblies, the third adjusting assembly is mounted on the mounting plate, a connecting plate is mounted on a driving end of the third adjusting assembly, and the fourth adjusting assemblies are mounted on the connecting plate; The machining head comprises a grinding head and a polishing head, the grinding head, the polishing head and the measuring head are one-to-one correspondingly mounted on driving ends of three different fourth adjusting assemblies; The third adjusting assembly is used for driving the grinding head, the polishing head and the measuring head to make reciprocating linear motion along the first direction, and the fourth adjusting assembly is used for driving the corresponding grinding head, polishing head or measuring head to make reciprocating linear motion along the second direction.

Images