Valve seat grinding device

Abstract

The utility model provides a valve seat grinding device, and belongs to the technical field of valve sealing face machining equipment. The device is used for grinding a valve seat of a to-be-ground valve, and comprises a grinding plate used for grinding the valve seat; the first positioning piece is arranged on one side of the grinding plate, and the first positioning piece is connected with a first connecting part in the valve to be ground; the second positioning piece is arranged on the side, away from the first positioning piece, of the grinding plate, and the second positioning piece is connected with the grinding plate; and the driving end of the driving assembly sequentially penetrates through the first positioning piece, the grinding plate and the second positioning piece and is used for driving the grinding plate and the second positioning piece to rotate. The grinding accuracy of the valve seat in the plane sealing stop valve can be improved, and the sealing performance of the plane sealing stop valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve sealing surface processing equipment, in particular to a valve seat grinding device. Background Art

[0002] Device grinding refers to the process of finishing the surface of the workpiece to be ground by relative motion between the grinding device and the workpiece to be ground under a certain pressure. The flat seal stop valve is a control element widely used in industrial pipeline systems. The core feature of the flat seal stop valve is that a flat seal is used between the valve seat and the valve disc. When the flat seal stop valve is closed, the valve disc will form a surface contact with the valve seat through rotation or lifting action to achieve complete sealing and prevent leakage of the fluid medium. It can not only greatly improve the sealing performance of the flat seal stop valve, but also make the cutoff effect of the fluid medium more accurate and effective. Therefore, the precise grinding of the flat contact surface between the valve disc and the valve seat in the flat seal stop valve is a key step to improve its cutoff effect.

[0003] However, due to the relatively complex internal structure of the flat sealing stop valve and the high requirements for grinding precision, the grinding device of the related technology has low grinding accuracy for the valve seat inside the flat sealing stop valve, which can easily affect the sealing performance of the flat sealing stop valve, thereby affecting the flat sealing stop valve's ability to cut off the fluid medium. Utility Model Content

[0004] The main purpose of the utility model is to propose a valve seat grinding device, which can improve the grinding accuracy of the valve seat inside the flat sealing stop valve, thereby improving the sealing performance of the flat sealing stop valve, that is, it can improve the shutoff ability of the flat sealing stop valve for the fluid medium.

[0005] To achieve the above-mentioned purpose, one aspect of an embodiment of the present application provides a valve seat grinding device for grinding a valve seat of a valve to be ground, the device comprising:

[0006] A grinding plate, the grinding plate is used to grind the valve seat;

[0007] A first positioning member, disposed on one side of the grinding plate, the first positioning member being connected to a first connecting member in the valve to be ground;

[0008] A second positioning member is disposed on a side of the grinding plate away from the first positioning member, and the second positioning member is connected to the grinding plate; and

[0009] A driving component, wherein the driving end of the driving component is sequentially inserted into the first positioning member, the grinding plate and the second positioning member, and is used to drive the grinding plate and the second positioning member to rotate.

[0010] In some embodiments, the first positioning member includes:

[0011] a first positioning portion, wherein the diameter of the first positioning portion is smaller than the diameter of the valve cavity of the valve to be ground; and

[0012] A second positioning portion, wherein the diameter of the second positioning portion is smaller than the diameter of the first positioning portion, and the second positioning portion extends deep into the installation area of ​​the first connecting component.

[0013] In some embodiments, at least two first positioning holes are provided on the first positioning portion, and the first positioning portion is fixedly connected to the first connecting component through the first positioning holes.

[0014] In some embodiments, the grinding plate is a circular ring structure, and at least two third positioning holes are provided on the grinding plate, and a second positioning hole is provided on the second positioning piece. The second positioning hole is arranged corresponding to the third positioning hole, and the third positioning hole and the second positioning hole are sequentially penetrated by a second fastener.

[0015] In some embodiments, the grinding plate is a circular ring structure, and at least two third positioning holes are provided on the grinding plate, and a second positioning hole is provided on the second positioning piece. The second positioning hole is arranged corresponding to the third positioning hole, and the third positioning hole and the second positioning hole are sequentially penetrated by a second fastener.

[0016] In some embodiments, the driving and fixing module includes:

[0017] A positioning slot connected to the drive positioning module;

[0018] a driving fixture connected to the positioning slot and used for placing the driving module when grinding the valve seat; and

[0019] A fastening structure is connected to the driving fixture and is used to fix the driving module on the driving fixture when grinding the valve seat.

[0020] In some embodiments, the driving fixture is a circular ring structure with an opening, the driving fixture includes a first circular ring end and a second circular ring end, and the fastening structure includes:

[0021] A first fastening plate connected to the end of the first circular ring; and

[0022] A second fastening plate is connected to the second circular ring end, wherein when the valve seat is ground, the driving module is fixed on the driving fixture by fastening the first fastening plate and the second fastening plate at a distance.

[0023] In some embodiments, the drive positioning module includes:

[0024] a positioning structural member connected to the first positioning member; and

[0025] The positioning guide rail comprises a guide rail slot, wherein the guide rail slot is used to accommodate the positioning slot. When the valve seat is ground, the positioning slot drives the driving module to move along the guide rail setting direction of the positioning guide rail to move the driving module to the preset grinding position.

[0026] In some embodiments, the positioning structure comprises:

[0027] At least two positioning support members, the positioning structure includes a plurality of positioning plates, and each of the positioning support members is used to connect any two positioning plates in different directions.

[0028] In some embodiments, the positioning structure is provided with a fourth positioning hole and a sixth positioning hole, and the first positioning member is provided with a fifth positioning hole corresponding to the fourth positioning hole, and the positioning structure is fixedly connected to the first positioning member by placing corresponding third fasteners in the fourth positioning hole and the fifth positioning hole;

[0029] The sixth positioning hole corresponds to the position of the first positioning hole set on the first positioning member, and the positioning structure, the first positioning member and the first connecting member are fixedly connected by placing the corresponding first fastener in the sixth positioning hole and the corresponding first positioning hole.

[0030] The present application proposes a valve seat grinding device, which includes a grinding plate, a first positioning member, a second positioning member and a driving assembly, wherein the grinding plate is used to grind the valve seat of the valve to be ground, the first positioning member is arranged on one side of the grinding plate, the first positioning member is connected to the first connecting member in the valve to be ground, the second positioning member is arranged on the side of the grinding plate away from the first positioning member, and the second positioning member is connected to the grinding plate; the driving end of the driving assembly is sequentially penetrated through the first positioning member, the grinding plate and the second positioning member, and is used to drive the grinding plate and the second positioning member to rotate. The utility model can smoothly place the grinding plate into the valve cavity of the valve to be ground by sequentially penetrating the driving end through the first positioning member, the grinding plate and the second positioning member, and can avoid the potential shaking problem caused by excessive gap through the stable connection between the first positioning member, the second positioning member and the grinding plate, ensure the stability of the grinding process of the valve seat, improve the grinding accuracy of the internal valve seat of the plane sealing stop valve, thereby improving the sealing performance of the plane sealing stop valve, that is, it can improve the cutoff ability of the plane sealing stop valve for the fluid medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1This is a longitudinal structural cross-sectional view of a flat sealing stop valve provided in an embodiment of the present application;

[0032] Figure 2 is a longitudinal structural cross-sectional view of the valve seat grinding device provided by the present application;

[0033] Figure 3 is a top view of the first positioning member 220 provided in the present application;

[0034] Figure 4 is a longitudinal structural cross-sectional view of the first positioning member 220 provided in the present application;

[0035] Figure 5 is a top view of the second positioning member 230 provided in the present application;

[0036] Figure 6 is a longitudinal structural cross-sectional view of the second positioning member 230 provided in the present application;

[0037] Figure 7 is a top view of the grinding plate 210 provided in the present application;

[0038] Figure 8 is a longitudinal structural cross-sectional view of the grinding plate 210 provided in the present application;

[0039] Fig. 9 This is a longitudinal structural cross-sectional view of the grinding plate 210 provided in the present application grinding the valve flap 120;

[0040] Fig.10 It is a schematic diagram of a longitudinal structural cross-sectional view of the driving end 240 provided by the present application placed in a transverse direction;

[0041] Fig.11 is a top view of the driving and fixing module 270 provided in the present application;

[0042] Fig.12 is a longitudinal structural cross-sectional view of the driving and fixing module 270 provided in the present application;

[0043] Fig.13 is a longitudinal structural cross-sectional view of the drive positioning module 280 provided in the present application;

[0044] Fig.14 is a top view of the drive positioning module 280 provided in the present application;

[0045] Fig.15 is a left side view of the positioning guide rail 282 provided by the present application;

[0046] Fig.16 It is a longitudinal structural cross-sectional view of the fastening bolt provided in the present application. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0048] It should be noted that, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0050] Before further describing the embodiments of the present application in detail, the nouns and terms involved in the embodiments of the present application are explained. The nouns and terms involved in the embodiments of the present application are subject to the following interpretations:

[0051] Grinding: It is a precision machining method used to improve the surface quality and shape accuracy of workpieces. Grinding can use grinding tools and abrasives to remove a very thin layer of metal from the surface of the workpiece, and this machining method can be used for various metal and non-metal materials to process planes, internal and external cylindrical surfaces, conical surfaces, convex and concave spherical surfaces, threads, tooth surfaces and other surfaces.

[0052] Device grinding: refers to the process of finishing the surface of the workpiece by relative motion between the grinding device and the workpiece under a certain pressure. This processing method can be used to process various metal and non-metal materials.

[0053] Valve seat: It is a component in the valve that supports the fully closed position of the valve core and forms a sealing pair. Its function is to ensure that the valve can completely cut off the flow of fluid when it is closed to prevent leakage. The valve seat is usually made of elastic sealing material, which can form a tight seal with the valve core when the valve is closed.

[0054] Valve disc: It is one of the main core parts of the valve that directly bears the medium pressure. Its main function is to form a sealing pair with the valve seat when the valve is opened and closed to connect or cut off the flow of the medium.

[0055] Conical seal: refers to a sealing method in which a conical contact surface is formed between the sealing element (such as a valve disc, plug, etc.) and the sealing seat. In this sealing method, the contact area between the sealing element and the sealing seat is small, but the contact stress is large, thereby improving the sealing performance.

[0056] Line seal: refers to a sealing method in which a linear contact is formed between the sealing element and the sealing seat. In this sealing method, the contact area between the sealing element and the sealing seat is very small, usually only a line. Due to the small contact area and large contact stress, the line seal has a higher sealing performance.

[0057] The flat sealing stop valve is a control element widely used in industrial piping systems, mainly used to cut off, regulate and throttle fluids. Figure 1 As shown, Figure 1 The longitudinal structural cross-sectional view of a plane sealing stop valve is shown, wherein the core feature of the plane sealing stop valve 100 is that a plane sealing method is adopted between the valve seat 110 and the valve disc 120, that is, the sealing plane 130 in the figure. Since the valve seat 110 and the valve disc 120 are both annular in shape and installed in the valve body, the sealing plane 130 is also annular in shape. Since the opening and closing member corresponding to the plane sealing stop valve 100 is a plug-shaped valve disc 120, the valve disc 120 moves linearly along the center line of the valve seat 110. The movement form of the valve stem can be a concealed stem (the valve stem is in the valve body, and the valve disc 120 is driven by rotating the valve stem) or a rising stem (the valve stem is outside the valve body, and the valve disc 120 is driven by lifting the valve stem). When the plane sealing stop valve 100 is closed, the valve disc 120 will form a surface contact with the valve seat 110 through a rotation or lifting action, so as to achieve complete sealing and prevent leakage of the fluid medium, which can not only greatly improve the sealing performance of the plane sealing stop valve, but also make the cutoff effect of the fluid medium more accurate and effective.

[0058] Compared with the cone seal or line seal used in related technologies, the advantages of flat seals are large contact area and uniform force, which can ensure good sealing under high pressure environment, and in the long-term use, due to the uniform wear distribution, its service life is longer and the maintenance and replacement frequency is lower. In addition, flat seal stop valves are usually made of special alloy materials such as high temperature resistance, corrosion resistance, and wear resistance to meet the application requirements under various harsh working conditions. For example, in the petrochemical, electric power, metallurgy and other industries, it can often be used in pipeline systems for conveying media such as steam, oil, acid and alkali solutions. In general, the flat seal stop valve is a high-efficiency valve product based on rigorous engineering design and advanced manufacturing technology, with the goal of improving sealing efficiency, extending service life, and adapting to complex working conditions. Because of its excellent performance and wide range of applications, it plays an indispensable role in various industrial fields, and plays a vital role in ensuring industrial production safety and optimizing energy utilization.

[0059] However, during valve maintenance and overhaul, the grinding of flat sealing stop valves is a process with high technical requirements and difficult operation. Figure 1 As shown in the figure, the difficulty of grinding the flat seal stop valve is mainly reflected in the following aspects: (1) Extremely high precision requirements: The core sealing part of the flat seal stop valve is the flat contact surface between the valve disc 120 and the valve seat 110. The parallelism, flatness and surface roughness of these two planes must meet high standards. During grinding, it is necessary to ensure that the gap between the two planes is uniform and small to ensure a good sealing effect and prevent leakage. This places high demands on the selection of grinding tools, the precise control of the grinding process and the technical level of the operator; (2) Different materials have different hardness: The sealing surface of the flat seal stop valve is made of a variety of materials, such as cemented carbide, ceramic or special stainless steel. The hardness of different materials varies greatly, and the adaptability requirements for the grinding process and grinding materials are also different. For materials with higher hardness, the grinding process must be able to effectively remove the defective layer while avoiding excessive wear or local overheating, which will affect the material performance and sealing surface integrity; (3) Complex internal structure: The internal structure of the flat seal stop valve is relatively complex, the grinding operation space is limited, and the grinding process cannot be observed intuitively, which increases the difficulty of the grinding operation. At the same time, in order to ensure the stability of the overall structure of the valve, special attention should be paid to the protection of the valve body and valve disc components during the grinding process to avoid unnecessary stress deformation; (4) Durability requirements: Flat sealing stop valves must withstand various working conditions such as high pressure, high temperature, and corrosion during long-term operation, and have extremely high requirements for the wear resistance and corrosion resistance of their sealing surfaces. Therefore, the sealing surface after grinding must not only have sufficient hardness and strength, but also have good fatigue resistance, erosion resistance, and corrosion resistance, which undoubtedly increases the challenge of grinding.

[0060] It is understandable that the grinding of the flat sealing stop valve is an engineering task with high technical content and high operating difficulty, which requires the operator to have profound theoretical knowledge, rich practical experience and rigorous operating skills, and also relies on advanced grinding tools as a guarantee. Only in this way can it be ensured that the flat sealing stop valve achieves an ideal sealing effect and a long service life after grinding. Therefore, the grinding device of the related art has low grinding accuracy for the valve seat 110 inside the flat sealing stop valve, which is easy to affect the sealing performance of the flat sealing stop valve, thereby affecting the flat sealing stop valve's ability to cut off the fluid medium.

[0061] Based on this, an embodiment of the present application provides a valve seat grinding device, which can improve the grinding accuracy of the valve seat inside the flat sealing stop valve, thereby improving the sealing performance of the flat sealing stop valve, that is, it can improve the flat sealing stop valve's ability to cut off fluid media.

[0062] See also Figure 2 , Figure 2 The valve seat grinding device 200 may include a grinding plate 210, a first positioning member 220 and a second positioning member 230. Figure 2 The specific structure of the valve seat grinding device 200 is introduced in detail.

[0063] The grinding plate 210 is used to grind the valve seat 110 of the valve to be ground.

[0064] A first positioning member 220 is disposed on one side of the grinding plate 210, and the first positioning member 220 is connected to a first connecting member in the valve to be ground;

[0065] A second positioning member 230 is disposed on a side of the grinding plate 210 away from the first positioning member 220, and the second positioning member 230 is connected to the grinding plate 210;

[0066] The driving assembly includes a driving end 240 , and the driving end 240 of the driving assembly is sequentially disposed through the first positioning member 220 , the grinding plate 210 , and the second positioning member 230 , and is used to drive the grinding plate 210 and the second positioning member 230 to rotate.

[0067] It should be noted that when grinding the valve seat 110 of the valve to be ground, the driving end 240 is used to place the grinding plate 210 into the valve cavity of the valve to be ground, and drive the grinding plate 210 and the second positioning member 230 to rotate through the driving assembly.

[0068] In some embodiments, Figure 3 and Figure 4 As shown, Figure 3 A top view of the first positioning member 220 provided in the present application is shown. Figure 4 A longitudinal structural cross-sectional view of the first positioning member 220 provided in the present application is shown. The first positioning member 220 includes:

[0069] A first positioning portion 310, wherein the diameter of the first positioning portion 310 is smaller than the diameter of the valve cavity of the valve to be ground; and

[0070] The second positioning portion 320 has a diameter smaller than that of the first positioning portion 310 , and the second positioning portion 320 is inserted deep into the installation area of ​​the first connecting component.

[0071] It should be noted that the first positioning member 220 of the present application can be a stepped cylindrical structure, also known as an upper positioning cylinder, that is, a cylindrical structure with a compact diameter. This design can enable the first positioning member 220 to form a precise clearance fit relationship with the valve cavity inside the valve to be ground, ensuring that the first positioning member 220 can be smoothly placed in the valve cavity, while avoiding potential shaking problems caused by excessive clearance, which is of decisive significance for maintaining the stability of the entire grinding device.

[0072] It should be noted that the first connecting member refers to the flange in the valve, which is used to achieve a firm connection between the first positioning member 220 and the flange in the valve. Figure 2 The first fastener 250 (such as a bolt, a screw, etc.) shown can achieve precise fastening.

[0073] It should be noted that if Figure 3 As shown, at least two first positioning holes 311 are provided on the first positioning portion 310, and the first positioning portion 310 is fixedly connected to the first connecting member through the first positioning holes 311. For example, if two first positioning holes 311 are provided on the first positioning portion 310, and the first positioning holes 311 are bolt holes, the top of the first positioning member 220 can be designed as a double-ear-shaped bolt hole structure, thereby achieving a firm connection between the first positioning member 220 and the flange in the valve, and accurate fastening can be achieved through bolts, ensuring a stable combination between the two, and further enhancing the rigidity and reliability of the grinding tool as a whole.

[0074] It should be noted that the diameter of the second positioning portion 320 is smaller than the diameter of the first positioning portion 310, so that a stepped cylindrical structure can be formed, and the valve seat grinding device 200 can be cleverly embedded in the installation area of ​​the first connecting component of the valve to be ground (i.e., the middle flange gasket installation area), effectively preventing the first positioning member 220 from accidentally slipping into the valve cavity.

[0075] In some embodiments, Figure 3 As shown, a first through hole 312 (610) is also provided in the middle of the first positioning portion 310. The first through hole 312 penetrates the first positioning member 220, and the driving end 240 passes through this channel, thereby realizing effective power transmission. In this process, the first positioning member 220 can realize a secondary guiding effect, namely, guiding the driving end 240 and guiding the stepped cylindrical structure.

[0076] In some embodiments, Figure 4 As shown, the first positioning member 220 may further include: a third positioning portion 330, the diameter of the third positioning portion 330 is smaller than the diameter of the second positioning portion 320, and the third positioning portion 330 penetrates into the installation area of ​​the first connecting component, which can further prevent the first positioning member 220 from accidentally sliding into the valve cavity.

[0077] It should be noted that if Figure 3 As shown, the diameter of the first positioning hole 311 may be 10 mm-110 mm (preferably 30 mm), and the diameter of the first through hole 312 may be 20 mm-50 mm (preferably 36.2 mm). Figure 4 As shown, the outer diameter of the first positioning portion 310 can be 380mm-480m (preferably 460mm), the height of the first positioning portion 310 can be 10mm-50m (preferably 20mm), the outer diameter of the second positioning portion 320 can be 355mm-370mm (preferably 362mm), the height of the second positioning portion 320 can be 10mm-30m (preferably 25mm), the outer diameter of the third positioning portion 330 can be 340mm-360mm (preferably 350mm), the height of the third positioning portion 330 can be 30mm-60 (preferably 50mm), and the center distance between the two first positioning holes 311 can be 380mm-420mm (preferably 404mm). Figure 3 and Figure 4 The unit of the design parameters corresponding to the structure can be millimeters. These diameter parameters can be flexibly adjusted according to actual needs without specific limitations, and the dimensional tolerance can be controlled according to ±0.1 mm. The first positioning member 220 and the second positioning member 230 of the present application can be made of high-temperature resistant, corrosion-resistant, wear-resistant and low-friction coefficient polymer materials such as polytetrafluoroethylene and polytetrafluoroethylene propylene, which are not limited here. The first positioning member 220 is usually preferably made of stainless steel, not only because of its good corrosion resistance and strength, but also because its interior has been scientifically and reasonably hollowed out. This lightweight design not only reduces the overall weight, but also ensures that in the process of contacting and generating friction with the valve seat 110, the accuracy and reliability of the positioning guide will not be affected by material wear.

[0078] It should be noted that since the grinding plate 210 and the second positioning member 230 are relatively far away from the middle flange of the valve, the existence of the first positioning member 220 is like a solid line of defense, which effectively suppresses any possible shaking of the driving end 240 during operation, thereby effectively ensuring the accuracy of the transmission process and playing an important role in improving the quality of the grinding operation.

[0079] In some embodiments, Figure 5 and Figure 6 As shown, Figure 5 A top view of the second positioning member 230 provided in the present application is shown. Figure 6 A longitudinal structural cross-sectional view of the second positioning member 230 provided by the present application is shown. The second positioning member 230 includes second positioning holes 231, and the number of the second positioning holes 231 can be 2, 4, 6, etc.

[0080] In some embodiments, Figure 7 As shown, Figure 7 A top view of the grinding plate 210 provided in the present application is shown. The grinding plate 210 includes at least two third positioning holes 211, and the second positioning hole 231 is arranged corresponding to the third positioning hole 211, and the third positioning hole 211 and the second positioning hole 231 are sequentially penetrated by the second fastener 260.

[0081] It should be noted that the present application does not specifically limit the number of the third positioning holes 211, and the more the number of the second positioning holes 231 and the corresponding second positioning holes 231 is, the more the number of the third positioning holes 211 is, and the more the number of the corresponding second positioning holes 231 is, the more the number of the third positioning holes 211 is, and the more the number of the corresponding second positioning holes 231 is, and the more the number of the corresponding third positioning holes 21 ... Figure 2 After the second fastener 260 is installed, the fastening degree between the grinding plate 210 and the second positioning member 230 can be improved, and the skewness during the grinding process can be better avoided.

[0082] It should be noted that if Figure 5 As shown, the shape of the second positioning member 230 can be cylindrical, and can also be called a lower positioning cylinder. Among them, the number of the third positioning holes 211 and the number of the second positioning holes 231 on the grinding plate 210 can be the same or different, as long as there are more than two groups of corresponding positions. For example, the second positioning member 230 is evenly distributed with second positioning holes 231 in four circumferential directions, and corresponds to the third positioning holes 211 (such as threaded holes, bolt holes, etc.) on the grinding plate 210, which cleverly achieves a stable connection between the grinding plate 210 and the second positioning member 230, and enhances the efficiency of the coordinated work of the two. Among them, the second fastener 260 can be a bolt, a screw, etc., without specific limitation.

[0083] It should be noted that if Figure 5 As shown, a second through hole 232 is also provided in the middle of the second positioning member 230, and the second through hole 232 penetrates the second positioning member 230, and the driving end 240 passes through this channel, thereby realizing effective transmission of power. For example, the second through hole 232 may be a threaded hole, which is an important interface for cooperating with other components, and enables the second positioning member 230 to be precisely connected with the driving end 240 by threaded engagement, thereby ensuring the stability and accuracy of the entire valve seat grinding device 200 during operation.

[0084] It should be noted that if Figure 5 and Figure 6As shown, the diameter of the second positioning hole 231 of the second positioning member 230 can be 16mm-27mm (preferably 18mm), the diameter of the second through hole 232 can be 20mm-30mm (preferably 24mm), the outer diameter of the second positioning member 230 can be 280mm-350mm (preferably 308mm), the center distance between two relative second positioning holes 231 can be 251mm-280mm (preferably 276mm), the diameter of the hollowed-out middle part of the second positioning member 230 can be 220mm-250mm (preferably 250mm), the height of the hollowed-out middle part of the second positioning member 230 can be 30mm-40mm (preferably 35mm), and the height of the second positioning member 230 can be 40mm-55mm (preferably 50mm). Figure 5 and Figure 6 The unit of the design parameters corresponding to the structure can be millimeters. These diameter parameters can be flexibly adjusted according to actual needs without specific limitations, and the dimensional tolerance can be controlled according to ±0.1 mm. Therefore, the four circumferential through holes of the second positioning member 230 of the present application can be evenly distributed with a diameter of 18 mm, corresponding to the corresponding positioning holes on the grinding plate 210, so as to achieve a stable connection between the grinding plate 210 and the second positioning member 230, and enhance the efficiency of the coordinated work of the two. A second through hole 232 with a diameter of 24 mm can be provided in the middle of the second positioning member 230, so that the main body can be precisely connected with the transmission rod by threaded engagement, ensuring the stability and accuracy of the entire tool during operation.

[0085] It should be noted that if Figure 2 and Figure 6 As shown, the outer diameter of the second positioning member 230 of the present application can be designed to be slightly smaller than the inner diameter of the valve seat 110 by about 1 mm. This subtle spatial difference can play an important guiding and positioning role in the grinding process, especially when the valve seat 110 is in a vertical installation state, it can effectively prevent the falling deviation caused by the gravity of the grinding tool itself, thereby ensuring the accuracy and stability of the grinding process. In other words, there is a gap between the second positioning member 230 and the valve seat 110. When the second positioning member 230 rotates, the friction will not affect the power transmission or damage the valve seat 110. In addition, the smaller gap value prevents the second positioning member 230 from being deflected, so it will not affect the grinding quality of the valve seat 110, that is, it plays a guiding and positioning role.

[0086] It should be noted that if Figure 6As shown, the middle of the second positioning member 230 can be completely hollowed out or partially hollowed out. The second positioning member 230 can be made of stainless steel, which has good corrosion resistance and strength. Moreover, since its interior is partially hollowed out in a scientific and reasonable manner, this lightweight design not only reduces the overall weight, but also ensures that during the process of contacting and generating friction with the valve seat 110, the accuracy and reliability of the positioning guide will not be affected by material wear.

[0087] In some embodiments, Figure 8 As shown, Figure 8 A longitudinal structural cross-sectional view of the grinding plate 210 provided in the present application is shown. The outer diameter of the grinding plate 210 is carefully calculated and designed to ensure that the grinding plate 210 is significantly larger than the outer diameter of the valve flap 120 and the sealing surface of the valve seat 110, so that it can be smoothly placed inside the valve cavity to achieve all-round contact and comprehensive grinding of the sealing surfaces of the valve flap 120 and the valve seat 110.

[0088] It should be noted that the middle part of the grinding plate 210 is intentionally hollowed out and precisely set to be larger than the outer diameter of the protruding part of the valve flap 120. In this way, the present application can only grind the plane where the valve flap 120 contacts the valve seat 110, which does not affect the effective grinding of the sealing surface of the valve flap 120 and avoids unnecessary interference with the protruding part of the valve flap 120 during the grinding process.

[0089] It should be noted that if Figure 7 and Figure 8 As shown, the grinding plate 210 may be provided with four third positioning holes 211, and the diameter of each third positioning hole 211 may be 12 mm-18 mm (preferably 16 mm), the center distance between two opposite third positioning holes 211 on the grinding plate 210 may be 251 mm-280 mm (preferably 276 mm), the outer diameter of the grinding plate 210 may be 330 mm-360 mm (preferably 346 mm), the middle diameter of the grinding plate 210 may be 220 mm-260 mm (preferably 350 mm), and the height of the grinding plate 210 may be 10 mm-30 mm (preferably 20 mm). Figure 7 and Figure 8 The unit of the corresponding design parameters of the structure can be millimeters. These diameter parameters (such as thickness, size of the third positioning space, inner and outer diameter sizes, etc.) can be flexibly adjusted according to actual needs without specific limitations, and the dimensional tolerance can be controlled according to ±0.1 mm.

[0090] Therefore, the present application can limit the four third positioning holes 211 to the inner diameter range of the sealing surface of the valve flap 120 and the valve seat 110 to be ground, which means that during the entire grinding operation, the third positioning holes 211 will not have any direct contact with the sealing surface of the valve flap 120 and the valve seat 110, thereby avoiding the risk of uneven grinding or damage to the sealing surface due to the existence of the third positioning holes 211. In addition, the material selection of the grinding plate 210 can be aluminum alloy, stainless steel and other materials, which have the characteristics of light weight, which not only helps to reduce the overall mass of the valve seat grinding device 200 and reduce the output torque of the drive component, but also because of its good flexibility and wear resistance, it can better adapt to and fit the surface contour of the part to be ground during the grinding process, thereby improving the grinding effect and efficiency.

[0091] It should be noted that if Fig. 9 As shown, Fig. 9 A longitudinal structural cross-sectional view of the grinding plate 210 provided in the present application grinding the valve flap 120 is shown. The grinding plate 210 can grind the plane of the valve flap 120 to be ground for plane sealing.

[0092] It should be noted that since the first positioning member 220 and the valve cavity, the second positioning member 230 and the valve seat 110 are all clearance fits, the grinding plate 210 and the valve seat 110 and the valve flap 120 are not necessarily concentric during grinding. Therefore, the outer diameter of the grinding plate 210 needs to be as large as possible (while ensuring that it can be placed in the valve cavity) so that the sealing surfaces of the valve flap 120 and the valve seat 110 can be fully ground without being concentric.

[0093] It should be noted that the grinding plate 210 of the present application is hollowed out in the middle, which not only eliminates the limitations caused by the interference between the protruding part of the valve disc 120 and the grinding plate 210 in the grinding process of the related technology, but also gives the grinding plate 210 a dual function, so that it can be used for grinding both the valve seat 110 and the valve disc 120, greatly improving the work efficiency and optimizing the process flow. There are at least two third positioning holes 211 (such as 4 threaded holes) evenly distributed on the circumference of the grinding plate 210, that is, four threaded holes evenly distributed on the circumference are used as the main fixing interface between the grinding plate 210 and the second positioning member 230, which can minimize the cumulative errors that may occur during the assembly process and ensure that the grinding plate 210 and the second positioning member 230 are accurately docked. The third positioning hole 211 on the grinding plate 210 is strictly limited to the inner diameter range of the sealing surface of the valve disc 120 and the valve seat 110, which means that during the entire grinding operation, the third positioning hole 211 will not have any direct contact with the sealing surface of the valve disc 120 and the valve seat 110, thereby avoiding the risk of uneven grinding or damage to the sealing surface due to the existence of the threaded hole. In addition, the material selection of the grinding plate 210 can be aluminum alloy material, which not only helps to reduce the overall mass of the valve seat grinding device 200 and reduce the output torque of the drive component, but also because of its good flexibility and wear resistance, it can better adapt to and fit the surface contour of the part to be ground during the grinding process, thereby improving the grinding effect and efficiency.

[0094] In some embodiments, Fig.10 As shown, Fig.10 A schematic diagram of a longitudinal structural cross-section of the driving end 240 provided by the present application is shown in a horizontal position. A first stud 241 is provided on the driving end 240, which can achieve precise docking and stable matching with the middle space of the second positioning member 230, ensuring that the two can form a solid overall structure after assembly, and realize effective force transmission and support.

[0095] It should be noted that if Fig.10As shown, the driving end 240 is also provided with a second stud 242, which adopts a square interface design, which greatly facilitates seamless connection with the driving module of the driving assembly (i.e., various common electric tools or conventional wrenches used in the relevant technology). Among them, the total length of the driving end 240 can be 400mm-600mm (preferably 530mm), the length of the first stud 241 of the driving end 240 can be 10mm-25mm (preferably 20mm), the length of the second stud 242 can be 20mm-40mm (preferably 30mm), the first stud 241 is a cylindrical structure, and the diameter of the cylinder can be 20mm-30mm (preferably 24mm), the diameter of the second stud 242 can be 20mm-30mm (preferably 24mm), and the diameter of the driving end 240 can be 31mm-40mm (preferably 36mm), that is, the diameter of the driving end 240 is larger than the diameters of the first stud 241 and the second stud 242. Among them, Fig.10 The unit of the design parameters corresponding to the structure can be millimeters. These diameter parameters can be flexibly adjusted according to actual needs without specific limitations, and the dimensional tolerance can be controlled according to ±0.1 mm.

[0096] It should be noted that the main part of the driving end 240 can be designed in a cylindrical shape, which not only ensures sufficient mechanical stability and structural strength, but more importantly, it can serve as a key link in power transmission, effectively transmitting the driving force acting thereon to each connecting component evenly and efficiently, thereby ensuring the continuity and stability of power transmission during the operation of the entire tool. In addition, the length of the driving end 240 is set in this application to exceed the actual height from the sealing surface of the valve seat 110 to the flange in the valve, which can ensure that the driving module can be completely placed outside the valve cavity, optimize the operating space and field of view of the grinding personnel, and make them more handy when grinding the valve, greatly improving the safety and convenience of the work.

[0097] It should be noted that the driving module of the driving assembly clamps the upper end of the driving end 240, transmits power to the second positioning member 230, and drives the grinding plate and the second positioning member 230 to rotate around the axis of the grinding plate 210. The length of the driving end 240 is specially designed to exceed the actual height from the sealing surface of the valve seat 110 to the flange in the valve (that is, not limited to the length shown in the figure of this application), that is, the driving end 240 exceeds the first positioning member 220, so that it is easy to connect with the driving module.

[0098] In some embodiments, Figure 2 As shown, the driving component of the present application also includes:

[0099] Driver module (not shown);

[0100] A driving fixing module 270 connected to the driving module; and

[0101] The driving positioning module 280 is connected to the driving fixing module 270 and is used to move the driving module to a preset grinding position.

[0102] Among them, the driving module of the present application can be a hand drill including a driving motor, whose rated voltage is 220V, the rated power can be selected according to needs, and the corresponding rotation speed can also be flexibly adjusted according to needs. The driving module of the present application can also be other devices with driving motor and rotation speed functions, without limitation. For example, the present application can be configured with a hand drill of multiple rated power levels, so that specific selection can be made according to actual on-site applications. Among them, when selecting a hand drill with a rated voltage of 220V, it is necessary to pay attention to whether its rated power matches the expected workload, and also to pay attention to whether its output speed has a wide range of adjustability.

[0103] It should be noted that if Figure 2 As shown, the first positioning member 220 is close to the driving module, the second positioning member 230 is far from the driving module, and the grinding plate 210 is located between the first positioning member 220 and the second positioning member 230. The preset grinding position refers to the position where the grinding plate can accurately grind the valve seat 110.

[0104] Among them, Fig.11 and Fig.12 As shown, Fig.11 FIG. 2 shows a top view of the driving fixing module 270 provided in the present application. Fig.12 A longitudinal structural cross-sectional view of the driving and fixing module 270 provided in the present application is shown. The driving and fixing module 270 includes:

[0105] The positioning slot 271 is connected to the driving positioning module 280;

[0106] A driving fixture 272 connected to the positioning slot 271 and used to place the driving module when grinding the valve seat 110; and

[0107] The fastening structure 273 is connected to the driving fixture 272 and is used to fix the driving module on the driving fixture 272 when the valve seat 110 is ground.

[0108] The driving fixing member 272 is a circular ring structure with an opening, and the driving fixing member 272 includes a first circular ring end (such as Fig.11 The left end of the ring in the upper middle part is not a closed end point) and the end of the second ring (such as Fig.11 The left end of the circle in the lower middle part is not a closed endpoint).

[0109] It should be noted that if Fig.11 As shown, the fastening structure 273 includes:

[0110] The first fastening plate 2731 (such as Fig.11 The structural plate connected to the left unclosed end of the circular ring in the upper half) is connected to the end of the first circular ring; and

[0111] The second fastening plate 2732 (such as Fig.11 A structural plate connected to the unclosed end point of the left end of the circular ring in the lower half) is connected to the end of the second circular ring, wherein, when the valve seat 110 is ground, the driving module is fixed on the driving fixing member 272 by tightening the distance between the first fastening plate 2731 and the second fastening plate 2732.

[0112] It should be noted that Fig.11 The driving fixing part 272 (also called the circular positioning platform) in the middle of the middle driving fixing module 270 refers to a structure specially tailored for the main body of the hand drill. Its shape and size can accurately match the bottom contour of various common hand drills to ensure that the tool can be placed firmly on it. There is no specific limitation on its size here.

[0113] It should be noted that Fig.11 The fastening structure 273 (also called an open straight fastening structure) at the left end of the middle drive fixing module 270 is to firmly lock the drive module (such as a hand drill) on the drive fixing module 270 through the drive fixing member 272 to prevent the drive module from being separated from the fixing device due to vibration or other external forces during operation. Among them, the fastening structure 273 adopts an open design, which is convenient for the operator to quickly install or remove the drive module, and also adapts to the subtle differences in width and thickness of different models of drive modules.

[0114] It should be noted that if Fig.11 and Fig.12As shown, the positioning slot 271 can be a rectangular unclosed structure with a "T"-shaped hollow in the middle, the length of the hollowed-out part along the vertical direction can be 12mm-20mm (preferably 16mm), the length of the hollowed-out part along the left-right direction can be 8mm-12mm (preferably 10mm), the length of the outlet of the hollowed-out part in the positioning slot 271 along the vertical direction can be 4mm-8mm (preferably 6mm), the length of the outlet of the hollowed-out part along the left-right direction can be 2mm-6mm (preferably 4mm), the length of the rectangular structure corresponding to the positioning slot 271 along the vertical direction can be 20mm-30mm (preferably 26mm), and the length of the rectangular structure corresponding to the positioning slot 271 along the left-right direction can be 13mm-18mm (preferably 15mm). The inner diameter of the annular fastening structure provided by the driving fixing member 272 can be 48mm-52mm (preferably 50mm), and the corresponding outer diameter can be 58mm-62m (preferably 60mm). The diameter of the through hole on the fastening structure 273 for fastening the first fastening plate and the second fastening plate can be 8mm-15mm (preferably 10mm). The distance between the center of the through hole for fastening the first fastening plate 2731 and the second fastening plate 2732 and the inner center of the driving fixture 272 can be 38mm-42mm (preferably 40mm), and the distance between the inner center of the driving fixture 272 and the outer maximum boundary of the positioning slot 271 can be 62mm-70mm (preferably 66.5mm). The distance between the inner center of the driving fixture 272 and the outer maximum boundary of the fastening structure 273 can be 48mm-55mm (preferably 50mm). The distance between the first fastening plate 2731 and the second fastening plate 2732 may be 2 mm-6 mm (preferably 4 mm), the outer boundary distance between the first fastening plate 2731 and the second fastening plate 2732 may be 10 mm-15 mm (preferably 14 mm), and the thickness of the driving fixing module 270 may be 15 mm-25 mm (preferably 20 mm). Fig.11 and Fig.12 The unit of the design parameters corresponding to the structure can be millimeters. These diameter parameters can be flexibly adjusted according to actual needs without specific limitations, and the dimensional tolerance can be controlled according to ±0.1 mm.

[0115] In some embodiments, Fig.13 and Fig.14 As shown, Fig.13 FIG. 2 shows a longitudinal structural cross-sectional view of the drive positioning module 280 provided in the present application. Fig.14 FIG. 2 shows a top view of a drive positioning module 280 provided in the present application. The drive positioning module 280 includes:

[0116] A positioning structure 281 connected to the first positioning member 220; and

[0117] The positioning rail 282 includes a rail slot 2821 for accommodating the positioning slot 271. When grinding the valve seat 110, the positioning slot 271 drives the driving module to move along the rail setting direction of the positioning rail 282 to move the driving module to a preset grinding position.

[0118] It should be noted that if Fig.15 As shown, Fig.15 A left view of the positioning rail 282 provided by the present application is shown. The positioning slot 271 of the present application and the positioning rail 282 on the driving positioning module 280 adopt the principle of clearance fit, that is, a small and precise spacing is maintained between the positioning slot 271 and the positioning rail 282 to ensure that the two can slide smoothly without obvious shaking or loosening. This clearance fit method gives the driving fixing module 270 a smooth and controllable vertical movement capability. During use, the height position of the driving module can be quickly adjusted according to actual needs to move the driving module to a preset grinding position.

[0119] Among them, combined Figure 2 and Fig.15 As shown, the main structure of the positioning structure 281 of the present application can adopt an L-shaped plate design with significant mechanical stability, that is, the positioning structure 281 includes a horizontal positioning plate 2811 and a vertical positioning plate 2812. The positioning structure 281 is provided with a fourth positioning hole 283 and a sixth positioning hole 284, and the first positioning member 220 is also provided with a fifth positioning hole 221, wherein the fourth positioning hole 283 is provided corresponding to the fifth positioning hole 221, and the positioning structure 281 is fixedly connected to the first positioning member 220 by placing the corresponding third fastener 290 in the fourth positioning hole 283 and the fifth positioning hole 221. The sixth positioning hole 284 has a different diameter from the fourth positioning hole 283, and the sixth positioning hole 284 corresponds to the corresponding first positioning hole 311. By placing the corresponding first fastener 250 in the sixth positioning hole 284 and the corresponding first positioning hole 311, the positioning structure 281, the first positioning member 220 and the first connecting member are fixedly connected.

[0120] Among them, the fifth positioning hole 221 set on the first positioning member 220 can be a threaded hole, which is used to install and fix the positioning structure 281, so as to ensure the accurate alignment and reliable connection between the driving module and the main body of the valve seat grinding device 200, so that the power transmission path is clear and stable, and avoid the reduction of grinding efficiency or loss of precision due to the position offset of the driving module.

[0121] Among them, the present application configures two bolt holes of different specifications on the horizontal positioning plate of the positioning structure 281 (i.e. Fig.14The fourth positioning hole 283 and the sixth positioning hole 284 in the valve body together ensure the precise connection between the positioning structure 281, the upper first positioning member 220 and the first connecting member (i.e., the flange in the valve). In addition, a positioning guide rail 282 is designed on the vertical positioning plate of the positioning structure 281 of the present application, which is specially designed for connecting the drive fixing module 270. This positioning guide rail 282 extends in the vertical direction to accurately guide the up and down sliding of the drive fixing module 270. At the same time, the presence of the positioning guide rail 282 can limit any unexpected movement of the drive fixing module 270 in the horizontal plane, ensuring that it can only move vertically along a preset trajectory.

[0122] In order to enhance the overall strength and rigidity of the positioning structure 281, Fig.13 As shown, at least two positioning supports 2813 are arranged at the intersection of the horizontal positioning plate and the vertical positioning plate of the positioning structure 281. The positioning structure 281 includes multiple positioning plates (i.e., the horizontal positioning plate 2811 and the vertical positioning plate 2812 in the figure, and can also be constructed with multiple other positioning plates, without limitation). Each positioning support 2813 is used to connect any two positioning plates in different directions, and the more positioning supports 2813 there are, the more stable the positioning structure 281 is. Therefore, by arranging at least two positioning supports 2813 at the intersection of the horizontal positioning plate 2811 and the vertical positioning plate 2812 of the positioning structure 281, the present application can enable the positioning structure 281 to maintain good morphological stability when subjected to complex loads.

[0123] It should be noted that if Fig.13 As shown, the length of the positioning rail 282 from the horizontal positioning plate 2811 can be 120mm-150mm (preferably 140mm), the distance between the edge of the positioning rail 282 close to the horizontal positioning plate 2811 and the horizontal positioning plate 2811 can be 10mm-20mm (preferably 20mm), the length of the positioning rail 282 can be 100mm-140mm (preferably 120mm), the length of the vertical positioning plate 2812 can be 155mm-180mm (preferably 160mm), the length of the horizontal positioning plate 2811 can be 90mm-120mm (preferably 100mm), the thickness of the horizontal positioning plate 2811 and the vertical positioning plate 2812 can be 10mm-15mm (preferably 10mm), and the distance between the side of the positioning support 2813 close to the upper end of the vertical positioning plate 2812 and the upper end of the vertical positioning plate 2812 can be 15mm-22mm (preferably 20mm). Among them, Fig.13 The unit of the design parameters corresponding to the structure can be millimeters. These diameter parameters can be flexibly adjusted according to actual needs without specific limitations, and the dimensional tolerance can be controlled according to ±0.1 mm.

[0124] It should be noted that if Fig.14 As shown, the positioning guide rail 282 is used to be accommodated in the positioning slot 271. The length of the positioning guide rail 282 along the up and down direction as shown in the figure can be 10mm-18mm (preferably 15mm), the length of the positioning guide rail 282 along the left and right direction as shown in the figure can be 7mm-11mm (preferably 10mm), the length of the guide slot 2821 along the up and down direction as shown in the figure can be 3mm-6mm (preferably 5mm), and the length of the guide slot 2821 along the left and right direction as shown in the figure can be 3mm-6mm (preferably 5mm). The diameter of the fourth positioning hole 283 can be 8mm-20mm (preferably 14mm), the diameter of the sixth positioning hole 284 can be 20mm-35mm (preferably 30mm), the length of the drive positioning module 280 along the up and down direction as shown in the figure can be 90mm-120mm (preferably 100mm), the length of the drive positioning module 280 along the left and right direction as shown in the figure can be 150mm-180mm (preferably 162mm), the distance from the center of the fourth positioning hole 283 to the rightmost boundary of the drive positioning module 280 can be 110mm-125mm (preferably 118mm), and the distance from the center of the sixth positioning hole 284 to the rightmost boundary of the drive positioning module 280 can be 20mm-30mm (preferably 28mm). Figure 4 As shown, the diameter of the fifth positioning hole 221 of the first positioning member 220 may be 8 mm-20 mm (preferably 12 mm), and the hole depth of the fifth positioning hole 221 may be 40 mm-50 mm (preferably 45 mm). Figure 4 and Fig.14 The unit of the design parameters corresponding to the structure can be millimeters. These diameter parameters can be flexibly adjusted according to actual needs without specific limitations, and the dimensional tolerance can be controlled according to ±0.1 mm.

[0125] It should be noted that the fasteners used in this application may be screws or fastening bolts, without limitation. Figure 2 As shown, for example, the first fastener 250 is a fastening bolt, the second fastener 260 is a common bolt, and the third fastener 290 is a screw. Fig.16 As shown, Fig.16A longitudinal structural cross-sectional view of the fastening bolt provided by the present application is shown. The structure of the fastening bolt can be consistent with that of the general bolt, and the precise matching of the thread is emphasized here, that is, the processed thread must be completely consistent with the reserved threaded hole of the valve body to ensure that the meshing between the two is tight and there is no gap or interference, so as to achieve a stable and reliable connection effect. Specifically, with regard to the design considerations of the thread length, according to the industry practice experience and the principles of engineering mechanics, the present application can clearly require that after the positioning cylinder is installed, the threaded portion should be able to be screwed in at least 5 turns. During the grinding operation, the guiding stability of the first positioning member 220 is very important. If the thread is not screwed in enough, it may cause the first positioning member 220 to shake or deviate during the grinding process, thereby affecting the grinding accuracy and surface quality of the entire sealing surface. Therefore, the design principle of screwing in at least 5 turns of thread, that is, the thread can be fully screwed in, means that the contact area between the bolt and the valve body is increased, thereby significantly improving the connection strength and effectively preventing loosening or failure caused by uneven force.

[0126] It should be noted that if Fig.16 As shown, the total length of the fastening bolt along the vertical direction as shown in the figure can be 80mm-100mm (preferably 90mm), the length of the middle cylinder along the vertical direction as shown in the figure can be 60mm-70mm (preferably 65mm), the length of the lower cylinder along the vertical direction as shown in the figure can be 40mm-50mm (preferably 45mm), the diameter of the top of the fastening bolt can be 35mm-45mm (preferably 40mm), and the diameter of the bottom of the fastening bolt can be 25mm-30mm (preferably 27mm). Among them, Fig.16 The unit of the design parameters corresponding to the structure can be millimeters. These diameter parameters can be flexibly adjusted according to actual needs without specific limitations, and the dimensional tolerance can be controlled according to ±0.1 mm.

[0127] The fastening bolts provided in this application can be made of stainless steel. Fig.16 The parameter units are all millimeters. In actual production, sharp corners are blunted and burrs are not allowed, and the same applies to this application. Figures 2 to 15 The device structure will not be described in detail here.

[0128] It should be noted that although the present application does not specifically describe the first fasteners, second fasteners and third fasteners such as bolts and screws used in the present application, it should be understood that these components can be flexibly selected according to actual industrial standards, which can not only meet the functional requirements of the valve seat grinding device 200 for the flat sealing stop valve of the present application, but also take into account durability, ease of use and practicality.

[0129] The valve seat grinding device 200 proposed in the present application is a tool that can grind a flat sealing stop valve, and can achieve efficient and high-quality grinding of a large-caliber flat sealing stop valve. In addition, experiments have shown that the valve seat grinding device 200 of the present application can effectively improve the maintenance efficiency and ensure the sealing performance of the valve. In addition, if the valve is located in a high-dose radiation area, the valve seat grinding device 200 of the present application can greatly shorten the maintenance time and improve the first-time success rate, so that the exposure time of the operating object in the high-dose area is significantly reduced, and the radiation dose of the operating object is effectively reduced.

[0130] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0131] Those skilled in the art will appreciate that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0132] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0133] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0134] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0135] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the above units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0136] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0137] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0138] The preferred embodiments of the present invention are described with reference to the accompanying drawings, but the scope of the present invention is not limited by the above. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the present invention.

Claims

1. A valve seat grinding device, used for grinding the valve seat of a valve to be ground, characterized in that: The device comprises: A grinding plate, the grinding plate is used to grind the valve seat; A first positioning member, disposed on one side of the grinding plate, the first positioning member being connected to a first connecting member in the valve to be ground; A second positioning member is disposed on a side of the grinding plate away from the first positioning member, and the second positioning member is connected to the grinding plate; and A driving component, wherein the driving end of the driving component is sequentially inserted into the first positioning member, the grinding plate and the second positioning member, and is used to drive the grinding plate and the second positioning member to rotate.

2. A valve seat grinding device according to claim 1, characterized in that: The first positioning member comprises: a first positioning portion, wherein the diameter of the first positioning portion is smaller than the diameter of the valve cavity of the valve to be ground; and A second positioning portion, wherein the diameter of the second positioning portion is smaller than the diameter of the first positioning portion, and the second positioning portion extends deep into the installation area of ​​the first connecting component.

3. A valve seat grinding device according to claim 2, characterized in that: At least two first positioning holes are provided on the first positioning portion, and the first positioning portion is fixedly connected to the first connecting component through the first positioning holes.

4. A valve seat grinding device according to any one of claims 1 to 3, characterized in that: The grinding plate is a circular ring structure, and is provided with at least two third positioning holes. The second positioning piece is provided with a second positioning hole. The second positioning hole is arranged corresponding to the third positioning hole. The third positioning hole and the second positioning hole are sequentially penetrated by a second fastener.

5. A valve seat grinding device according to any one of claims 1 to 3, characterized in that: The drive assembly also includes: Driver module; a driving fixing module connected to the driving module; and The driving positioning module is connected to the driving fixing module and is used to move the driving module to a preset grinding position.

6. A valve seat grinding device according to claim 5, characterized in that: The driving and fixing module comprises: A positioning slot connected to the drive positioning module; a driving fixture connected to the positioning slot and used for placing the driving module when grinding the valve seat; and A fastening structure is connected to the driving fixture and is used to fix the driving module on the driving fixture when grinding the valve seat.

7. A valve seat grinding device according to claim 6, characterized in that: The driving fixing member is a circular ring structure with an opening, the driving fixing member includes a first circular ring end and a second circular ring end, and the fastening structure includes: A first fastening plate connected to the end of the first circular ring; and A second fastening plate is connected to the second circular ring end, wherein when the valve seat is ground, the driving module is fixed on the driving fixture by fastening the first fastening plate and the second fastening plate at a distance.

8. A valve seat grinding device according to claim 6, characterized in that: The drive positioning module comprises: a positioning structural member connected to the first positioning member; and The positioning guide rail comprises a guide rail slot, wherein the guide rail slot is used to accommodate the positioning slot. When the valve seat is ground, the positioning slot drives the driving module to move along the guide rail setting direction of the positioning guide rail to move the driving module to the preset grinding position.

9. A valve seat grinding device according to claim 8, characterized in that: The positioning structure comprises: At least two positioning support members, the positioning structure comprises a plurality of positioning plates, and each of the positioning support members is used to connect any two positioning plates in different directions.

10. A valve seat grinding device according to claim 8, characterized in that: The positioning structure is provided with a fourth positioning hole and a sixth positioning hole, the first positioning member is provided with a fifth positioning hole corresponding to the fourth positioning hole, and the positioning structure is fixedly connected to the first positioning member by placing corresponding third fasteners in the fourth positioning hole and the fifth positioning hole; The sixth positioning hole corresponds to the position of the first positioning hole set on the first positioning member, and the positioning structure, the first positioning member and the first connecting member are fixedly connected by placing the corresponding first fastener in the sixth positioning hole and the corresponding first positioning hole.

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