Polishing device

Abstract

The application belongs to the technical field of polishing, and particularly relates to a polishing device which comprises a fixing seat and a plurality of polishing assemblies. The polishing assemblies are arranged along the circumference of the fixing seat. Each polishing assembly comprises a polishing rod, a polishing seat and a polishing piece. One end of the polishing rod is connected with the fixing seat, the other end of the polishing rod is connected with the polishing seat, and the polishing piece is connected with the polishing seat. The polishing device can improve the polishing quality and efficiency.

Description

Technical Field

[0001] This application belongs to the field of polishing technology, and in particular relates to a polishing device. Background Technology

[0002] Valves are a crucial component of nuclear power plants, with each unit containing tens of thousands of valves. During each major overhaul, hundreds of valves need to be disassembled. Grinding the valve components after disassembly is a vital task. However, grinding the stepped surfaces or inner walls of some components is typically done manually using sandpaper. This method is inefficient and the grinding quality is difficult to guarantee.

[0003] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Utility Model Content

[0004] The purpose of this invention is to provide a grinding device that improves grinding efficiency and grinding quality.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a grinding device, including a fixed base and multiple grinding components; the multiple grinding components are arranged circumferentially along the fixed base, each grinding component includes a grinding rod, a grinding seat and a grinding element, one end of the grinding rod is connected to the fixed base, the other end of the grinding rod is connected to the grinding seat, and the grinding element is connected to the grinding seat.

[0006] Optionally, one end of the grinding rod is hinged to the fixed base, and the other end of the grinding rod is hinged to the grinding base.

[0007] Optionally, the polishing device also includes an adjustment component, which connects the fixed base and the polishing rods of the multiple polishing components. The adjustment component is used to drive the polishing rods of the multiple polishing components to extend or retract.

[0008] Optionally, the adjustment assembly includes a connecting rod, a connecting seat, and multiple adjusting rods. The multiple adjusting rods are distributed circumferentially along the connecting seat. One end of the multiple adjusting rods is hinged to the connecting seat, and the other end of the multiple adjusting rods is respectively hinged to the grinding rods of the multiple grinding assemblies.

[0009] The connecting rod connects the connecting seat and the fixed seat. At least one of the connecting seat and the fixed seat can move along the axial direction of the connecting rod to adjust the distance between the connecting seat and the fixed seat, thereby driving the grinding rods of the multiple grinding components to unfold or retract.

[0010] Optionally, the adjustment assembly also includes a locking component connected to the connecting rod for locking the connecting seat and the fixed seat.

[0011] Optionally, the locking component includes a locking member and a first elastic member. The fixed seat is fixedly connected to the connecting rod. The connecting rod passes through the first elastic member, the connecting seat, and the locking member in sequence. The first elastic member is located between the fixed seat and the connecting seat. The locking member is screwed to the connecting rod.

[0012] Optionally, the connecting rod passes through the fixed seat, and the outer peripheral surface of the connecting rod is provided with an abutting protrusion. The fixed seat is located between the first elastic member and the abutting protrusion, and the abutting protrusion is used to abut against the end face of the fixed seat facing away from the connecting seat.

[0013] Optionally, the connecting rod is provided with a groove extending along the axial direction of the connecting rod, and the inner wall of the connecting seat is provided with a sliding protrusion for sliding engagement with the groove; or, the inner wall of the connecting seat is provided with a groove extending along the axial direction of the connecting rod, and the connecting rod is provided with a sliding protrusion for sliding engagement with the groove.

[0014] Optionally, each polishing assembly also includes a second elastic element, one end of which is hinged to the polishing rod, allowing the polishing seat to flip to the outside of the polishing rod, and the second elastic element connecting the other end of the polishing rod and the polishing seat.

[0015] Optionally, the grinding device also includes an electric drive unit that drives the fixed base to rotate.

[0016] The grinding device provided by this utility model has at least one of the following technical effects: When the grinding device is in use, multiple grinding components are inserted into the channel near the end of the grinding part. After the multiple grinding parts abut against the step surface or inner wall, the fixed base is rotated, and the grinding parts of the multiple grinding components rotate, so that the step surface or inner wall is ground around the whole circle, reducing the risk of over-grinding or insufficient grinding in a single position, improving the grinding quality, and ensuring a better grinding quality. In addition, grinding can be achieved by inserting multiple grinding components into the channel and then rotating the fixed base, which is simple to operate and helps to improve grinding efficiency.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] 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.

[0019] Figure 1 A schematic diagram of the structure of the grinding device provided in some embodiments of this application, located within the valve passage. Figure 1 .

[0020] Figure 2 This is a schematic diagram of the structure of a grinding device provided in some embodiments of this application, located outside the valve passage.

[0021] Figure 3 Schematic diagram of the structure of the grinding device provided in some embodiments of this application, located outside the valve passage. Figure 2 .

[0022] Figure 4 For along Figure 3 Sectional view along line AA in the middle.

[0023] Figure 5 Schematic diagram of the structure of the grinding apparatus provided in some embodiments of this application Figure 1 .

[0024] Figure 6 for Figure 5 Schematic diagram of the grinding device shown Figure 2 .

[0025] Figure 7 For along Figure 6 Sectional view along the middle BB line.

[0026] Figure 8 for Figure 5 An exploded view of the polishing apparatus shown.

[0027] Figure 9 Schematic diagram of the structure of the grinding apparatus provided in some embodiments of this application Figure 1 .

[0028] The following are the labeling elements in the figure:

[0029] 1. Grinding device; 11. Fixed base; 12. Grinding assembly; 121. Grinding rod; 122. Grinding seat; 123. Second elastic element; 13. Adjusting assembly; 131. Connecting rod; 1311. Abutting protrusion; 1312. Slide groove; 132. Connecting seat; 1321. Sliding protrusion; 133. Adjusting rod; 134. Locking component; 1341. Locking element; 1342. First elastic element; 2. Electric drive component; 3. Valve; 31. Channel; 32. Step surface; 33. Inner wall. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] In the description of the embodiments of this application, 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 indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include at least one of that feature.

[0032] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this application, it should be understood that the terms "inner", "outer", "side", "upper", "bottom", "front", "rear", etc., indicating the orientation or positional relationship 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, and therefore should not be construed as a limitation of this application.

[0036] In the description of this application, it should be noted that the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0037] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0038] Valves are a crucial component of nuclear power plants. Each unit contains tens of thousands of valves, and during each major overhaul, hundreds of valves need to be disassembled. Cleaning and inspecting the valve components after disassembly is a vital task.

[0039] In valves, the grinding of the stepped surfaces used to house the sealing gaskets and the grinding of the inner walls of the components are of paramount importance. The stepped surfaces will be used as an example for illustration.

[0040] The importance of the stepped surface, as the area where sealing gaskets are placed, is self-evident. The integrity of the stepped surface and the quality of its grinding directly determine whether there will be leakage after the valve is reinstalled. The stepped surface must undergo meticulous grinding, cleaning, and inspection before it can be used again after each disassembly.

[0041] Depending on the operational requirements of the equipment, stepped surfaces for installing gaskets are typically designed between the valve seat and valve body, and between the valve cover and valve body, to prevent internal or external leakage of the medium. For reliable sealing, the machining precision of these stepped surfaces must be significantly higher than that of the rest of the valve body. During long-term valve operation, the stepped surfaces suffer varying degrees of damage due to prolonged pressure, residue from old gaskets, and electrochemical effects from contact with different materials. If left untreated, this damage will worsen, altering the dimensions of the stepped surfaces and causing deformation. This can ultimately lead to insufficient gasket compression or damage to the gasket's integrity during compression, resulting in gasket failure and unexpected valve leakage. Therefore, each disassembly requires grinding and cleaning of the stepped surfaces. Since these surfaces are typically narrow, annular structures, especially in valves with small dimensions, this is often done manually by cutting a piece of sandpaper, folding it into a small piece, and grinding it bit by bit.

[0042] In actual grinding, grinding a single step surface takes about half an hour to achieve a satisfactory result. A valve typically has at least 2-3 steps, so disassembling a single valve and spending about an hour and a half just on grinding the steps alone is insufficient. Furthermore, manual grinding can lead to over-grinding in a single area or insufficient grinding in certain areas, resulting in poor surface smoothness and difficulty in guaranteeing grinding quality. Therefore, manually grinding with sandpaper is inefficient and yields inconsistent grinding quality.

[0043] This application provides a polishing device. The device has a fixed base surrounded by multiple polishing components. Each polishing component has a polishing element mounted on the polishing base, which is fixed to the fixed base by a polishing rod. In use, the multiple polishing components are inserted into a channel. The polishing elements of the multiple components abut against the stepped surface or inner wall of the channel and are distributed circumferentially. Then, the fixed base is rotated, causing the polishing elements to rotate within the channel, ensuring that the stepped surface or inner wall is polished over the entire circumference. This reduces the risk of over-polishing or insufficient polishing in a single location, improving the smoothness and quality of the polishing. Furthermore, polishing can be achieved simply by inserting the polishing components into the channel and then rotating the fixed base, simplifying the operation and improving efficiency.

[0044] The following combination Figures 1-9 The polishing apparatus 1 of this application embodiment.

[0045] like Figures 1-4 As shown, in one embodiment of this application, a polishing device 1 is provided. The polishing device 1 includes a fixed base 11 and a plurality of polishing components 12. The plurality of polishing components 12 are arranged circumferentially along the fixed base 11. Each polishing component 12 includes a polishing rod 121, a polishing seat 122 and a polishing element. One end of the polishing rod 121 is connected to the fixed base 11, and the other end of the polishing rod 121 is connected to the polishing seat 122. The polishing element is connected to the polishing seat 122.

[0046] The grinding device 1 can grind the stepped surface 32 or the inner wall 33 within the channel 31. For example, the valve 3 has a cylindrical channel 31 with a stepped surface 32 inside. The stepped surface 32 can be used to install a sealing gasket or other components. The grinding device 1 can grind the stepped surface 32, and it can also grind the inner wall 33 of the channel 31. Of course, in other examples, the grinding device 1 can also grind the cylindrical inner wall 33 (e.g., the inner wall 33 of the equipment packing chamber, etc.).

[0047] The mounting base 11 can refer to the mounting base used to fix multiple grinding components 12. The material of the mounting base 11 can be metal or plastic, etc., and the shape of the mounting base 11 can be various, such as: cuboid, cylinder, etc.

[0048] The grinding component 12 can refer to the step surface 32 or inner wall 33 in the grinding channel 31; multiple grinding components 12 are distributed around the fixed base 11, so that during the rotation of the fixed base 11, multiple grinding components 12 can be driven to rotate around the rotation axis M of the fixed base 11.

[0049] For example, multiple polishing components 12 are evenly spaced along the circumference of the fixed base 11, and the multiple polishing components 12 are arranged in a ring array with the rotation axis M of the fixed base 11 as the center. The number of multiple polishing components 12 is three, and the three polishing components 12 form a three-claw structure.

[0050] For example, the fixed base 11 has a cylindrical structure, and the axis of the fixed base 11 is the rotation axis M of the fixed base 11.

[0051] The grinding assembly 12 includes a grinding rod 121, a grinding base 122, and a grinding component. The grinding rod 121 is connected between the fixed base 11 and the grinding base 122. The grinding component is installed on the grinding base 122 and can be sandpaper, grinding stone, grinding disc, or other components.

[0052] The grinding rod 121 is used to connect the grinding base 122 and the grinding base 122, allowing the grinding assembly 12 to be inserted deeper into the channel 31, thereby meeting the grinding requirements of the deeper step surface 32 and inner sidewall 33. The grinding rod 121 can be made of various materials, such as metal or plastic; the grinding rod 121 and the fixing base 11 can be fixedly connected by means of bonding, hinge, thread, etc.

[0053] The grinding base 122 can refer to a component used to fix the grinding part. The grinding base 122 can be made of various materials, such as metal or plastic. The grinding base 122 and the grinding rod 121 can be fixedly connected by means of bonding, hinge, thread, etc. The grinding base 122 and the grinding part are not detachable; or, the grinding base 122 and the grinding part are detachably connected to facilitate the replacement of the grinding part, for example, the grinding part is bonded to the grinding base 122.

[0054] In this embodiment of the grinding device 1, multiple grinding components 12 are inserted into the channel 31 near the ends of the grinding parts. After the multiple grinding parts abut against the step surface 32 or the inner sidewall 33, the fixing base 11 is rotated, and the grinding parts of the multiple grinding components 12 rotate, so that the step surface 32 or the inner sidewall 33 is ground around the entire circle. This reduces the risk of over-grinding or insufficient grinding in a single position, improves the grinding quality, and ensures a better grinding quality. In addition, grinding can be achieved simply by inserting multiple grinding components 12 into the channel 31 and then rotating the fixing base 11. The grinding operation is simple and helps to improve grinding efficiency.

[0055] In some embodiments, the grinding base 122 and the grinding rod 121 are detachably connected to allow for the replacement of different types of grinding bases 122 to meet the grinding needs of different parts.

[0056] For example, when grinding the step surface 32, the grinding seat 122 is installed on the side of the grinding rod 121 along the length direction. After the grinding seat 122 is inserted into the channel 31, the grinding part on the grinding seat 122 can directly abut against the step surface 32, thereby realizing grinding.

[0057] For example, when polishing the inner sidewall 33, the polishing seat 122 is installed on the outside of the polishing rod 121. After the polishing seat 122 extends into the channel 31, the polishing seat 122 is located between the polishing rod 121 and the inner sidewall 33. The polishing part on the polishing seat 122 directly abuts against the inner sidewall 33, thereby realizing polishing.

[0058] In some embodiments, the grinding device 1 further includes an electric drive 2, which drives the fixed base 11 to rotate.

[0059] Electric drive component 2 can refer to a component that can output rotational power, such as a motor or electric drill.

[0060] The electric drive unit 2 drives the fixed base 11 to rotate, making the grinding operation more time-saving and labor-saving.

[0061] In some embodiments, see Figures 5-8 As shown, one end of the grinding rod 121 is hinged to the fixed base 11, and the other end of the grinding rod 121 is hinged to the grinding base 122.

[0062] "Hinged connection" can refer to two components connected by a hinge axis. The hinge axis passes through the hinge holes on the two components, allowing the two components to rotate around the hinge axis. The axis of the hinge axis is called the hinge axis.

[0063] One end of the grinding rod 121 is hinged to the fixed base 11, allowing the grinding rod 121 to rotate relative to the fixed base 11, thereby meeting the grinding requirements of the stepped surface 32 or inner wall 33 of the channel 31 with different diameters. The hinge axis between the grinding rod 121 and the fixed base 11 is perpendicular to the rotation axis M of the fixed base 11.

[0064] The other end of the grinding rod 121 is hinged to the grinding base 122, allowing the grinding base 122 to rotate relative to the grinding rod 121. Therefore, when facing the stepped surface 32 or inner wall 33 of the channel 31 with different diameters, the grinding part can rotate relative to the grinding rod 121, allowing it to better conform to the stepped surface 32 or inner wall 33, thus improving the grinding quality. The hinge axis between the grinding rod 121 and the grinding base 122 is perpendicular to the rotation axis M of the fixed base 11.

[0065] In some embodiments, the polishing device 1 further includes an adjustment component 13, which connects the fixed base 11 and the polishing rods 121 of the plurality of polishing components 12. The adjustment component 13 is used to drive the polishing rods 121 of the plurality of polishing components 12 to unfold or retract.

[0066] The adjusting component 13 can refer to a component capable of adjusting the rotation angle of the grinding rods 121 of the multiple grinding components 12 relative to the fixed base 11. The adjusting component 13 adjusts the grinding rods 121 of the multiple grinding components 12 to rotate toward the fixed base 11, thereby enabling the multiple adjusting components 13 to be relatively retracted, thus meeting the grinding requirements of the step surface 32 and inner wall 33 of the channel 31 with a smaller diameter; the adjusting component 13 also adjusts the grinding rods 121 of the multiple grinding components 12 to rotate away from the fixed base 11, causing the multiple adjusting components 13 to be extended, thereby meeting the grinding requirements of the step surface 32 and inner wall 33 of the channel 31 with a larger diameter.

[0067] By adjusting component 13, the grinding rods 121 of multiple grinding components 12 can be adjusted simultaneously, making the adjustment operation simple and convenient.

[0068] In some embodiments, the adjustment assembly 13 includes a connecting rod 131, a connecting seat 132, and a plurality of adjusting rods 133. The plurality of adjusting rods 133 are distributed circumferentially along the connecting seat 132. One end of the plurality of adjusting rods 133 is hinged to the connecting seat 132, and the other end of the plurality of adjusting rods 133 is respectively hinged to the grinding rods 121 of the plurality of grinding assemblies 12. The connecting rod 131 connects the connecting seat 132 and the fixed seat 11. At least one of the connecting seat 132 and the fixed seat 11 can move axially along the connecting rod 131 to adjust the distance between the connecting seat 132 and the fixed seat 11, thereby driving the grinding rods 121 of the plurality of grinding assemblies 12 to unfold or retract.

[0069] The connecting seat 132 can refer to the mounting base of multiple adjusting rods 133, which serves to support the adjusting rods 133. The connecting seat 132 and the fixed seat 11 are arranged along the rotation axis M of the fixed seat 11. The connecting rod 131 is used to connect the fixed seat 11 and the connecting seat 132, and the connecting rod 131 is distributed along the rotation axis M of the fixed seat 11.

[0070] The adjusting rod 133 is used to connect the connecting seat 132 and the grinding rod 121. The two ends of the adjusting rod 133 are hinged to the connecting seat 132 and the grinding rod 121 respectively. The hinge axis between the adjusting rod 133 and the connecting seat 132 and the hinge axis between the adjusting rod 133 and the grinding rod 121 are both perpendicular to the rotation axis M of the fixed seat 11.

[0071] The number of adjusting rods 133 is the same as the number of grinding rods 121, and the adjusting rods 133 and grinding rods 121 are connected in a one-to-one correspondence. The adjusting rods 133 are connected to the middle of the grinding rods 121, and the adjusting rods 133 can drive the grinding rods 121 to rotate relative to the fixed base 11 with less effort.

[0072] In some examples, the connecting seat 132 is fixedly connected to the connecting rod 131, the connecting rod 131 is slidably connected to the fixed seat 11, and the fixed seat 11 moves along the connecting rod 131, causing the distance between the connecting seat 132 and the fixed seat 11 to change.

[0073] In some examples, the connecting seat 132 is slidably connected to the connecting rod 131, the connecting rod 131 is fixedly connected to the fixed seat 11, and the connecting seat 132 moves along the connecting rod 131, causing the distance between the connecting seat 132 and the fixed seat 11 to change.

[0074] In some examples, the connecting seat 132 is slidably connected to the connecting rod 131, the connecting rod 131 is slidably connected to the fixed seat 11, the connecting seat 132 moves along the connecting rod 131, or the fixed seat 11 moves along the connecting rod 131, or the connecting seat 132 and the fixed seat 11 move closer or further away from each other along the connecting rod 131, so that the distance between the connecting seat 132 and the fixed seat 11 changes.

[0075] The distance between the connecting seat 132 and the fixed seat 11 is reduced, and the connecting seat 132 can drive the adjusting rod 133 to rotate away from the fixed seat 11. The adjusting rod 133 drives the grinding rod 121 to move away from the fixed seat 11, thereby realizing the unfolding of the grinding rod 121 of the multiple grinding components 12.

[0076] The distance between the connecting seat 132 and the fixed seat 11 increases, and the connecting seat 132 can drive the adjusting rod 133 to rotate toward the fixed seat 11. The adjusting rod 133 drives the grinding rod 121 to move toward the fixed seat 11, thereby realizing the retraction of the grinding rod 121 of the multiple grinding components 12.

[0077] By adopting the technical solution of this embodiment, the adjustment component 13 adopts the structure of connecting rod 131, connecting seat 132 and adjustment rod 133, which is simple in structure and easy to process and manufacture; by adjusting the distance between connecting seat 132 and fixed seat 11, the grinding rods 121 of multiple grinding components 12 can be retracted and unfolded, and the adjustment operation is simple and convenient.

[0078] In some embodiments, the adjusting assembly 13 further includes a locking member 134, which is connected to the connecting rod 131 and is used to lock the connecting seat 132 and the fixing seat 11.

[0079] The locking component 134 can refer to a component that can lock the connecting seat 132 and the fixed seat 11 relative to each other. For example, the locking component 134 can be a fixing pin, nut or other component. The locking component 134 can fix the distance between the connecting seat 132 and the fixed seat 11, fix the position of the grinding part, and allow the grinding part to stably grind the step surface 32 and the inner sidewall 33.

[0080] In some embodiments, the locking member 134 includes a locking member 1341 and a first elastic member 1342. The fixed seat 11 is fixedly connected to the connecting rod 131. The connecting rod 131 passes through the first elastic member 1342, the connecting seat 132 and the locking member 1341 in sequence. The first elastic member 1342 is located between the fixed seat 11 and the connecting seat 132. The locking member 1341 is screwed to the connecting rod 131.

[0081] One end of the connecting rod 131 is fixedly connected to the fixed seat 11, and the other end of the connecting rod 131 passes through the first elastic member 1342, the connecting seat 132 and the locking member 1341 in sequence. The first elastic member 1342 is located between the fixed seat 11 and the connecting seat 132, and the two ends of the first elastic member 1342 abut against the fixed seat 11 and the connecting seat 132 respectively. The connecting seat 132 is located between the locking member 1341 and the locking member 1341.

[0082] The locking element 1341 is screwed to the connecting rod 131. The outer circumferential surface of the connecting rod 131 is provided with external threads, and the locking element 1341 is provided with an internal threaded hole. The connecting rod 131 can pass through the internal threaded hole, and the external threads and the internal threads in the internal threaded hole mesh with each other. For example, the locking element 1341 is a nut. The first elastic element 1342 is a spring, etc.

[0083] The first elastic element 1342 can provide a constant thrust to the connecting seat 132, so that the locking element 1341 is always in close contact with the connecting seat 132.

[0084] When the distance between the fixed seat 11 and the connecting seat 132 needs to be increased, rotate the nut. The nut moves away from the fixed seat 11. Under the elastic action of the first elastic element 1342, the first elastic element 1342 pushes the connecting seat 132 away from the fixed seat 11, thereby increasing the distance between the fixed seat 11 and the connecting seat 132, and realizing the retraction of the grinding rods 121 of the multiple grinding components 12.

[0085] When the distance between the fixed seat 11 and the connecting seat 132 needs to be reduced, rotate the nut so that the nut moves toward the fixed seat 11. The nut pushes the connecting seat 132 toward the fixed seat 11 and compresses the first elastic element 1342, thereby increasing the distance between the fixed seat 11 and the connecting seat 132 and realizing the retraction of the grinding rods 121 of the multiple grinding components 12.

[0086] In some embodiments, the connecting seat 132 is clearance-fitted with the connecting rod 131 to facilitate the movement of the connecting seat 132 along the connecting rod 131.

[0087] In some embodiments, the connecting rod 131 passes through the fixed seat 11, and the outer peripheral surface of the connecting rod 131 is provided with an abutting protrusion 1311. The fixed seat 11 is located between the first elastic member 1342 and the abutting protrusion 1311, and the abutting protrusion 1311 is used to abut against the end face of the fixed seat 11 facing away from the connecting seat 132.

[0088] The fixing seat 11 is sleeved on the outside of the connecting rod 131. The outer peripheral surface of the connecting rod 131 is provided with an abutting protrusion 1311. The abutting protrusion 1311 is located on the side of the fixing seat 11 facing away from the connecting seat 132. The protrusion can abut against the end face of the fixing seat 11 facing away from the connecting seat 132, so that the connecting rod 131 will not come out of the fixing seat 11. Under the elastic action of the first elastic member 1342, the protrusion abuts against the fixing seat 11, which can also realize the fixed connection between the connecting rod 131 and the fixing seat 11. The connection method of connecting the connecting rod 131 and the fixing seat 11 by using the protrusion and the fixing seat 11 sleeved together is simple and convenient for the assembly of the grinding device 1.

[0089] In some embodiments, the connecting rod 131 may be clearance-fitted or interference-fitted with the fixed base 11.

[0090] In some embodiments, the electric drive unit 2 is connected to the end of the connecting rod 131 facing away from the fixed base 11. The electric drive unit 2 drives the connecting rod 131 to rotate, thereby driving the grinding part to rotate and realizing grinding.

[0091] In some embodiments, the cross-section of the end of the connecting rod 131 facing away from the fixed base 11 is hexagonal, which can be directly and quickly connected to the connector of the power motor or electric drill.

[0092] In some embodiments, the connecting rod 131 is provided with a groove 1312 extending axially along the connecting rod 131, and the inner wall of the connecting seat 132 is provided with a sliding protrusion 1321 for slidingly engaging with the groove 1312.

[0093] The outer peripheral wall of the connecting rod 131 is provided with a groove, which is the sliding groove 1312. The inner wall of the connecting seat 132 is provided with a protrusion, which is the sliding protrusion 1321. When the connecting rod 131 passes through the connecting seat 132, the sliding protrusion 1321 is located in the sliding groove 1312. The sliding groove 1312 extends along the axial direction of the connecting rod 131, so that when the connecting seat 132 slides along the connecting rod 131, the sliding protrusion 1321 moves within the sliding groove 1312. On the one hand, it provides a sliding surface for the connecting seat 131. 2. The movement along the connecting rod 131 serves as a guide, making the sliding of the connecting seat 132 more stable. On the other hand, when the connecting rod 131 is driven to rotate, thereby driving the grinding part to rotate, the cooperation of the sliding groove 1312 and the sliding protrusion 1321 can limit the rotation of the connecting seat 132 relative to the connecting rod 131, so that the rotational power of the connecting rod 131 can be stably transmitted to the grinding rod 121 and the grinding part, making the rotational grinding of the grinding part more stable and reliable.

[0094] For example, the groove 1312 may be provided at the external thread, and the groove 1312 passes through the external thread circumferentially along the connecting rod 131.

[0095] In some embodiments, the slide groove 1312 and the sliding protrusion 1321 are provided in a one-to-one correspondence. The number of slide grooves 1312 can be one or more, and the multiple slide grooves 1312 are provided at intervals along the circumference of the connecting rod 131.

[0096] For example, there are two slides 1312, which are symmetrically arranged on opposite sides of the connecting rod 131.

[0097] For example, there are three slides 1312, which are evenly arranged around the periphery of the connecting rod 131.

[0098] In some embodiments, the inner wall of the connecting seat 132 is provided with a groove 1312 extending axially along the connecting rod 131, and the connecting rod 131 is provided with a sliding protrusion 1321 for slidingly engaging with the groove 1312.

[0099] The inner wall of the connecting seat 132 is provided with a groove, which is the sliding groove 1312. The outer peripheral wall of the connecting rod 131 is provided with a protrusion, which is the sliding protrusion 1321. When the connecting rod 131 passes through the connecting seat 132, the sliding protrusion 1321 is located in the sliding groove 1312. The sliding groove 1312 extends along the axial direction of the connecting rod 131, so that when the connecting seat 132 slides along the connecting rod 131, the sliding protrusion 1321 moves within the sliding groove 1312. On the one hand, this provides the connecting seat 132 with a sliding surface. 2. The movement along the connecting rod 131 serves as a guide, making the sliding of the connecting seat 132 more stable. On the other hand, when the connecting rod 131 is driven to rotate, thereby driving the grinding part to rotate, the cooperation of the sliding groove 1312 and the sliding protrusion 1321 can limit the rotation of the connecting seat 132 relative to the connecting rod 131, so that the rotational power of the connecting rod 131 can be stably transmitted to the grinding rod 121 and the grinding part, making the rotational grinding of the grinding part more stable and reliable.

[0100] In some embodiments, the grinding seat 122 is hinged to the end of the grinding rod 121. When grinding the stepped surface 32, the grinding seat 122 is located between the stepped surface 32 and the grinding rod 121. The grinding element is installed on the end face of the grinding seat 122 facing away from the grinding rod 121. The grinding element is located between the stepped surface 32 and the grinding seat 122. The grinding device 1 rotates and the grinding element grinds the stepped surface 32.

[0101] In some embodiments, the surface of the grinding base 122 facing away from the grinding rod 121 is a plane. After the grinding part is pasted onto the plane, the grinding part also has a planar structure. At this time, the grinding part can better fit with the step surface 32, improving grinding efficiency and quality.

[0102] In some embodiments, see Figure 9 As shown, each polishing assembly 12 also includes a second elastic element 123. One end of the polishing base 122 is hinged to the polishing rod 121, so that the polishing base 122 can be flipped to the outside of the polishing rod 121. The second elastic element 123 is connected between the other end of the polishing rod 121 and the polishing base 122.

[0103] When polishing the inner wall 33, the polishing seat 122 rotates relative to the polishing rod 121 toward the fixed seat 11, so that the polishing seat 122 is located outside the polishing rod 121. In this way, after the polishing device 1 is inserted into the channel 31, the polishing part can abut against the inner wall 33 of the channel 31, thereby realizing the polishing of the inner wall 33 of the channel 31. During this process, the second elastic member 123 can push the polishing seat 122 to rotate toward the inner wall 33, so that the polishing part abuts against the inner wall 33 with a certain pressure, which helps to improve polishing efficiency.

[0104] The second elastic element 123 can be a spring, a sheet, etc.

[0105] For example, the second elastic element 123 is a spring sheet, one end of which is sleeved and fixed to the grinding rod 121, and the other end of which abuts against the grinding seat 122, so that the grinding part can fit tightly against the inner wall 33.

[0106] In some embodiments, the surface of the grinding base 122 facing away from the grinding rod 121 is a circular arc cylindrical surface. After the grinding part is attached to the circular arc cylindrical surface, the grinding part also has a circular arc cylindrical structure. At this time, the grinding part can better fit with the inner sidewall 33, thereby improving grinding efficiency and quality.

[0107] In this embodiment of the grinding device 1, the specific usage process involves rotating the locking member 1341 to a preset position so that the position of the grinding part matches the size of the step surface 32 or inner wall 33 within the channel 31. Then, the grinding part is attached to the grinding base 122. Next, the electric drive member 2 is connected to the connecting rod 131. Then, the grinding part is inserted into the channel 31 and abuts against the corresponding step surface 32 or inner wall surface. Then, the electric drive member 2 is activated, causing the connecting rod 131 to rotate, which in turn rotates the grinding part, thereby achieving full-circle grinding of the step surface 32 or inner wall 33. This allows for rapid grinding of the step surface 32 or inner wall 33, thus revealing defects. Furthermore, using electric drive grinding enables mechanization of grinding, improving automation and reducing labor intensity while enhancing the quality of grinding the step surface 32 or inner wall 33, thereby providing a reliable guarantee for the sealing of the gasket.

[0108] The grinding device 1 of this application combines a mechanical structure with power tools, revolutionizing the traditional method of manually grinding step surfaces. It can comprehensively meet the grinding and polishing needs of step surfaces 32 with different diameters, and can be simultaneously applied to grinding the inner walls of tubular structures with different diameters, especially small diameters. While reducing the labor intensity of on-site maintenance personnel, it improves the grinding quality of the step surface 32 and enhances the maintenance quality of the step surface 32. More importantly, the device is lightweight and can be operated by a single person with one hand. Furthermore, the three-jaw design improves the stability of the device while reducing the number of parts, facilitating repair after device failure. It is suitable for complex on-site working environments, especially for maintenance in high-radiation environments, greatly reducing the labor intensity of on-site personnel and lowering the risk of occupational injuries.

[0109] Verification based on on-site maintenance tests:

[0110] 1. In terms of improving work efficiency: Each task saves about 0.5 hours, and each major overhaul involves more than 100 tasks, resulting in a total saving of 50 hours;

[0111] 2. Regarding reducing personnel exposure: Using a single valve 3 within the nuclear island can reduce the dose by approximately 0.1 mSv. If calculated based on 50 valves 3 per major overhaul, the dose can be reduced by approximately 5 mSv.

[0112] 3. Improved grinding quality: According to on-site use, after grinding with this grinding device 1, the rust marks on the step surface 32 are thoroughly removed, the smoothness is significantly improved, and the sealing effect of the sealing gasket is significantly improved.

[0113] The grinding device 1 of this application embodiment can be used to grind the annular step surface 32 of various valves 3. It is suitable for complex on-site working environments, especially for maintenance in high-radiation environments. It can greatly improve the grinding quality of the step surface 32 and greatly reduce the labor intensity of on-site workers and reduce the risk of occupational injury.

[0114] The grinding device 1 of this application embodiment can greatly improve the work efficiency of maintenance personnel in grinding the step surface 32 and the packing chamber. Disassembling each valve 3 can save about 0.5 hours of cleaning, grinding and inspection time. It is suitable for complex on-site working environments, especially for maintenance in high-radiation environments, and can greatly reduce the time personnel are exposed to radiation. It has a simple structure and low requirements for maintenance personnel when used on-site. After a simple explanation, personnel can fully master the use and maintenance methods of the tools.

[0115] 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.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A polishing device, characterized in that, include: Fixed base; Multiple grinding components are arranged circumferentially along the fixed base. Each grinding component includes a grinding rod, a grinding seat, and a grinding element. One end of the grinding rod is connected to the fixed base, the other end of the grinding rod is connected to the grinding seat, and the grinding element is connected to the grinding seat. Each of the grinding components further includes a second elastic element, one end of the grinding seat is hinged to the grinding rod so that the grinding seat can be flipped to the outside of the grinding rod, and the second elastic element is connected between the other end of the grinding rod and the grinding seat so that the grinding component abuts against the inner wall of the valve.

2. The polishing device according to claim 1, characterized in that: One end of the grinding rod is hinged to the fixed base, and the other end of the grinding rod is hinged to the grinding base.

3. The polishing device according to claim 2, characterized in that: The polishing device further includes an adjustment component, which is connected to the fixed base and the polishing rods of the plurality of polishing components. The adjustment component is used to drive the polishing rods of the plurality of polishing components to extend or retract.

4. The polishing device according to claim 3, characterized in that: The adjustment assembly includes a connecting rod, a connecting seat, and a plurality of adjusting rods. The plurality of adjusting rods are distributed circumferentially along the connecting seat. One end of the plurality of adjusting rods is hinged to the connecting seat, and the other end of the plurality of adjusting rods is respectively hinged to the grinding rod of the plurality of grinding assemblies. The connecting rod connects the connecting seat and the fixed seat. At least one of the connecting seat and the fixed seat can move along the axial direction of the connecting rod to adjust the distance between the connecting seat and the fixed seat, thereby driving the grinding rods of the plurality of grinding components to extend or retract.

5. The polishing device according to claim 4, characterized in that: The adjustment assembly also includes a locking component connected to the connecting rod for locking the connecting seat and the fixed seat.

6. The polishing apparatus according to claim 5, characterized in that: The locking component includes a locking member and a first elastic member. The fixed seat is fixedly connected to the connecting rod. The connecting rod passes through the first elastic member, the connecting seat, and the locking member in sequence. The first elastic member is located between the fixed seat and the connecting seat. The locking member is screwed to the connecting rod.

7. The polishing apparatus according to claim 6, characterized in that: The connecting rod passes through the fixed seat, and the outer peripheral surface of the connecting rod is provided with an abutting protrusion. The fixed seat is located between the first elastic member and the abutting protrusion, and the abutting protrusion is used to abut against the end face of the fixed seat facing away from the connecting seat.

8. The polishing apparatus according to claim 6, characterized in that: The connecting rod is provided with a groove extending along the axial direction of the connecting rod, and the inner wall of the connecting seat is provided with a sliding protrusion for slidingly engaging with the groove; or, the inner wall of the connecting seat is provided with a groove extending along the axial direction of the connecting rod, and the connecting rod is provided with a sliding protrusion for slidingly engaging with the groove.

9. The polishing apparatus according to any one of claims 1 to 8, characterized in that: The grinding device also includes an electric drive unit, which drives the fixed base to rotate.

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