Grinding device

Abstract

The application relates to a grinding device, which comprises a grinding arm, a first driving assembly, a second driving assembly and a grinding disc; the first driving assembly comprises a first rotating shaft and a first driving part, the first rotating shaft is connected with the first driving part; the second driving assembly comprises a second rotating shaft, an eccentricity adjusting shaft and a second driving part, the eccentricity adjusting shaft is sleeved outside the first rotating shaft; the second rotating shaft is sleeved outside the eccentricity adjusting shaft and is connected with the second driving part; the grinding disc is detachably connected with the bottom end of the first rotating shaft; the second rotating shaft and the eccentricity adjusting shaft are eccentric shafts, and the eccentricity adjusting shaft is rotatably arranged in the second rotating shaft. The application can realize concentric circle grinding and eccentric eight-character grinding, and has high grinding efficiency and process standardization.

Description

Technical Field

[0001] This application relates to the field of valve sealing technology, and more specifically, to a grinding device. Background Technology

[0002] Valves in some equipment in nuclear power plants, which serve as the valves at the pressure boundary of the loop, need to maintain extremely stringent sealing performance (leakage rate ≤6ml / h) under relatively high pressure (taking the primary loop pressurizer as an example, its pressure environment is about 210 bar). In order to ensure this sealing performance, the requirements for grinding the sealing surface are very high.

[0003] The existing grinding method is manual grinding, which uses self-made grinding jigs and grinding plates with self-adhesive sandpaper to perform concentric circle grinding. This grinding method has many shortcomings: 1. Low efficiency of manual grinding: Especially when there are large defects on the sealing surface, a great deal of manpower is required to eliminate defects and grind, increasing the radiation dose to personnel. 2. Extremely high requirements for experience and technique: Since it is impossible to measure the flatness and roughness of the sealing surface in real time, manual grinding requires high standards for the cleanliness and condition observation of the sealing surface, whether to change the sandpaper type, and a good feel for the surface. Novices are very prone to skill-related errors. 3. Manual grinding uses a concentric circle rotation method. Due to the inability to control the force and speed evenly and precisely, it is very easy to grind unevenly. 4. Manual grinding can only use a concentric circle rotation method for concentric circle grinding, and cannot achieve the better eccentric figure-eight grinding effect. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a grinding device in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0006] A grinding apparatus is constructed, comprising a grinding arm, the grinding arm including:

[0007] The first drive assembly includes a first rotating shaft and a first drive component, wherein the first rotating shaft is connected to the first drive component;

[0008] The second drive assembly includes a second rotating shaft, an eccentricity adjustment shaft, and a second drive member. The eccentricity adjustment shaft is sleeved outside the first rotating shaft; the second rotating shaft is sleeved outside the eccentricity adjustment shaft and connected to the second drive member; and

[0009] The grinding disc is detachably connected to the bottom end of the first rotating shaft;

[0010] Both the second rotating shaft and the eccentricity adjustment shaft are eccentric shafts, and the eccentricity adjustment shaft is rotatably disposed within the second rotating shaft.

[0011] In some embodiments, the second drive assembly further includes an eccentricity adjustment ring, the bottom end of the eccentricity adjustment shaft extends beyond the bottom end of the second rotating shaft, and the eccentricity adjustment ring is fixed to the bottom end of the eccentricity adjustment shaft.

[0012] In some embodiments, the second drive assembly further includes an adjustment shaft protective sleeve, which is disposed circumferentially between the second rotating shaft and the eccentricity adjustment shaft, and is detachably connected to the second rotating shaft and the eccentricity adjustment shaft respectively; the adjustment shaft protective sleeve is spaced apart from at least a portion of the eccentricity adjustment shaft.

[0013] In some embodiments, a reference mark is provided on the outer side of the bottom end of the adjusting shaft protective sleeve; the eccentricity adjusting ring is located at the bottom end of the adjusting shaft protective sleeve, and a plurality of eccentricity indicator marks are provided on its outer side at circumferential intervals; the eccentricity adjusting ring rotates synchronously with the eccentricity adjusting shaft, so that different eccentricity indicator marks can point to the reference mark.

[0014] In some embodiments, the first rotating shaft is recessed from the bottom end to the top end to form a receiving groove. The first driving component further includes a spring loading component disposed in the receiving groove. The spring loading component includes a loading spring and a loading shaft. The loading shaft is movably disposed in the receiving groove, and its bottom end is connected to the grinding disc. The loading spring is sleeved on the loading shaft, and both ends of the loading spring abut against the receiving groove and the end face of the loading shaft, respectively.

[0015] In some embodiments, the loading shaft includes a first shaft segment, a second shaft segment, and a third shaft segment connected sequentially from top to bottom. The first shaft segment is connected to the first rotating shaft, and the shaft diameter of the third shaft segment is larger than that of the first shaft segment and the second shaft segment, respectively. The loading spring is sleeved on the first shaft segment and the second shaft segment, and its two ends abut against the receiving groove and the top end of the third shaft segment, respectively.

[0016] In some embodiments, the bottom end of the loading shaft is provided with a plurality of loading force markings spaced apart along the axial direction. Different loading force markings correspond to different elastic forces of the loading spring, and the loading force markings can be exposed in the receiving groove.

[0017] In some embodiments, the second drive assembly further includes a transition flange, which is connected to the second drive member and the second rotating shaft respectively; the output shaft of the first drive member and / or the first drive assembly passes through the transition flange.

[0018] In some embodiments, the grinding apparatus further includes a grinding arm support assembly, which includes a frame, a transmission assembly, a drive assembly, and a mounting bracket for fixing the grinding arm. The mounting bracket is connected to the transmission assembly, which is disposed on the frame. The drive end of the drive assembly is connected to the transmission assembly, and the drive assembly drives the mounting bracket to reciprocate along the extension direction of the frame via the transmission assembly.

[0019] In some embodiments, the grinding apparatus further includes an online grinding fixing assembly, which includes a chuck component for being fitted onto the grinding arm and a support flange detachably disposed on the valve, the chuck component being detachably connected to the support flange.

[0020] In some embodiments, the chuck component includes a first chuck, a first locking ring, and a first clamping sleeve fitted on the grinding arm. The first clamping sleeve is disposed inside the first chuck, the first locking ring is fitted outside the first clamping sleeve, and the first chuck is detachably connected to the support flange.

[0021] In some embodiments, the grinding arm further includes a housing and a depth adjustment ring, wherein the second drive assembly and at least a portion of the first drive assembly are disposed within the housing, and the depth adjustment ring is movably fitted onto the housing for positioning the grinding arm at a set height.

[0022] In some embodiments, the grinding device further includes an offline grinding fixing assembly, which includes a base, a valve disc fixing component, a valve body fixing flange, and a second chuck for fixing the valve disc fixing component or the valve body fixing flange. The second chuck and the grinding arm support assembly are detachably mounted on the base.

[0023] In some embodiments, the valve disc fixing component includes a valve disc mounting seat, a second locking ring, and a second clamping sleeve. The valve disc mounting seat is cylindrical, the second clamping sleeve is disposed on the valve disc mounting seat, and the second locking ring is sleeved outside the second clamping sleeve.

[0024] Implementing the embodiments of the present invention has at least the following beneficial effects:

[0025] This invention, by setting a second rotating shaft and an eccentricity adjustment shaft, and driving the rotation of the second and first rotating shafts respectively through a second driving component and a first driving component, enables both concentric circle grinding and eccentric figure-eight grinding. This invention eliminates the need for manual grinding by using a driving assembly, improving grinding accuracy and efficiency, ensuring grinding effect, and standardizing the grinding process while reducing manpower input. Attached Figure Description

[0026] The present application will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0027] Figure 1 This is a three-dimensional structural diagram of the grinding apparatus in the offline grinding state according to an embodiment of this application;

[0028] Figure 2 This is a three-dimensional structural diagram of the grinding apparatus in the online grinding state according to an embodiment of this application;

[0029] Figure 3 yes Figure 1 and Figure 2 A cross-sectional structural diagram of the grinding arm in the diagram;

[0030] Figure 4 yes Figure 3 Enlarged view of the structure of part P in the diagram;

[0031] Figure 5 yes Figure 3 Enlarged view of the Q region in the diagram;

[0032] Figure 6 yes Figure 3 Enlarged view of the structure of part M in the image;

[0033] Figure 7 yes Figure 1 Enlarged view of the structure of part N in the image;

[0034] Figure 8 yes Figure 1 A cross-sectional structural diagram of the grinding arm support assembly in the diagram;

[0035] Figure 9 yes Figure 1 A cross-sectional structural diagram of the offline grinding fixing component;

[0036] Figure label:

[0037] 1-Grinding device; 10-Grinding arm; 20-Grinding arm support assembly; 30-Online grinding fixing assembly; 40-Offline grinding fixing assembly;

[0038] 11-Outer shell; 111-First part; 112-Second part; 113-Third part; 12-Depth adjustment ring; 13-First drive assembly; 131-First rotating shaft; 1311-Accommodation groove; 132-Spring loading component; 1321-Loading spring; 1322-Loading shaft; 1323-Limit nut; 1324-Pin; 133-Coupling; 134-Universal joint; 135-First drive component; 14-Second drive assembly; 141-Second rotating shaft; 142-Eccentricity adjusting shaft; 143-Eccentricity adjusting ring; 144-Adjusting shaft protective sleeve; 1441-Main body; 1442-Connecting part; 145-Bearing cover; 146-Transition flange; 147-Second drive component; 15-Grinding disc; 151-Disc body; 152-Connecting flange; 1521-Assembly groove; 153-Assembly part; 154-Limit component;

[0039] 21-Frame; 22-Transmission assembly; 221-Lead screw; 222-Nut seat; 23-Mounting bracket; 24-Drive assembly; 241-Drive motor; 242-Reducer; 25-Positioning component;

[0040] 31-Chuck assembly; 311-First chuck; 312-First locking ring; 32-Support flange; 321-Observation window;

[0041] 41-Base; 42-Second chuck; 43-Valve disc fixing component; 431-Valve disc mounting seat; 432-Second clamping sleeve; 433-Second locking ring. Detailed Implementation

[0042] To provide a clearer understanding of the technical features, objectives, and effects of this application, the specific embodiments of this application are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this application.

[0043] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" 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 mechanical connection or an electrical connection; 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. When an component is referred to as being "on" or "below" another component, that component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0044] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0045] Figures 1 to 9 A grinding device 1 according to the present invention is shown, which can perform electric grinding on various valves in nuclear power plants. For example... Figures 1 to 3 As shown, the grinding device 1 includes a grinding arm 10. The grinding arm 10 includes a first drive assembly 13, a second drive assembly 14, and a grinding disc 15. The second drive assembly 14, through its own rotation, drives the first drive assembly 13 to revolve. The first drive assembly 13, through its own rotation, achieves its own rotation. The rotation of the first drive assembly 13, combined with the revolve driven by the second drive assembly 14, achieves a superposition of rotations, thereby realizing concentric circle grinding or eccentric figure-eight grinding of the grinding disc 15. The grinding disc 15 is used to grind the sealing surface (valve body or valve disc) of a valve.

[0046] The first drive assembly 13 includes a first rotating shaft 131 and a first drive member 135. The first drive member 135 drives the rotation of the first rotating shaft 131. The top end of the first rotating shaft 131 is connected to the output shaft of the first drive member 135, and the bottom end is detachably connected to the grinding disc 15. This detachable connection allows for the replacement of different grinding discs 15 for different valves.

[0047] The second drive assembly 14 includes a second rotating shaft 141, an eccentricity adjustment shaft 142, and a second drive member 147. The eccentricity adjustment shaft 142, via bearings, is sleeved around the first rotating shaft 131 and is used to adjust the eccentricity of the first rotating shaft 131 during the grinding process. It also drives the rotation of the second rotating shaft 141 to the first rotating shaft 131, enabling the first rotating shaft 131 to revolve. The second rotating shaft 141 is sleeved around the eccentricity adjustment shaft 142, and its top end is connected to the second drive member 147. The second drive member 147 drives the second rotating shaft 141 to rotate.

[0048] It should be noted that both the second rotating shaft 141 and the eccentricity adjustment shaft 142 are eccentric shafts, and the eccentricity adjustment shaft 142 is rotatably disposed within the second rotating shaft 141.

[0049] By setting the second rotating shaft 141 as an eccentric shaft, the axis of the first rotating shaft 131 and the axis of the second rotating shaft 141 can be set to not coincide (e.g., Figure 3 As shown, Figure 3 In the diagram, axis L is the axis of the second rotating shaft, and axis S is the axis of the first rotating shaft. During the grinding process, the rotation of the second rotating shaft 141 causes the first drive assembly 13 within the second rotating shaft 141 to revolve. By adding the rotation of the first rotating shaft 131 to this, eccentric figure-eight grinding can be achieved.

[0050] By also setting the eccentricity adjustment shaft 142 as an eccentric shaft, and making it rotatable within the second rotating shaft 141, the distance between the axis of the first rotating shaft 131 and the axis of the second rotating shaft 141 can be adjusted by rotating the eccentricity adjustment shaft 142 within the second rotating shaft 141, thus achieving stepless adjustment of the eccentricity. Different eccentricities can be adjusted for different situations to achieve different degrees of eccentric figure-eight grinding.

[0051] Meanwhile, when the position reached by the eccentricity adjustment shaft 142 within the second rotating shaft 141 is such that the axis of the first rotating shaft 131 coincides with the axis of the second rotating shaft 141, the rotation of the second rotating shaft 141 during the grinding process will not cause the first rotating shaft 131 to revolve, thus enabling concentric circle grinding.

[0052] The grinding device 1 constructed in this application can achieve both concentric circle grinding and eccentric figure-eight grinding. Furthermore, it can be driven by the first drive component 135 and the second drive component 147, eliminating the need for manual grinding. This improves grinding accuracy, ensures grinding effect, standardizes the grinding process, and reduces manpower input. It also avoids the problems of radiation exposure to operators during prolonged manual grinding, as well as inaccurate grinding and failure to achieve a sealing effect.

[0053] It's important to understand that an "eccentric shaft" refers to a hollow shaft (a shaft with through holes formed parallel to its axis) with varying wall thicknesses at different radial positions. In other words, it's a shaft where the axis of the central through hole is parallel and spaced apart from the shaft's axis. Furthermore, it's a shaft where the center points of the outer and inner contours of its cross-section do not coincide.

[0054] It should be noted that the concept of "eccentric shaft" mentioned above, as well as the various shaft components in this application, all refer to round shafts.

[0055] It is important to understand that "top" and "bottom" both refer to the positional relationship when the object is placed vertically during the grinding process. Specifically, for example... Figure 1 and Figure 2 As shown.

[0056] It should be understood that "rotation" in this embodiment refers to the rotation of the first rotating shaft 131 around its own axis and the rotation of the second rotating shaft 141 around its own axis. "Revolution" in this embodiment refers to the rotation of the first rotating shaft 131 around the axis of the second rotating shaft 141 and the rotation of the eccentricity adjustment shaft 142 around the axis of the second rotating shaft 141.

[0057] It's important to understand that for both "eccentric figure-eight grinding" and "concentric circle grinding," eccentric figure-eight grinding, which yields better grinding results, can be used when space allows (there are no wall limitations in the circumferential direction). When space is limited, concentric circle grinding should be chosen.

[0058] It should be understood that the grinding device 1 constructed in this application can also be applied to valves in non-nuclear power fields. This embodiment uses valves in the nuclear power field as an example to illustrate the grinding device 1 constructed in this application, and is not intended to limit the application field of this application.

[0059] In some embodiments, the first drive member 135 and the second drive member 147 can be driven by existing motors or other drive devices to achieve rotational drive of the shaft, and no specific limitation is made here.

[0060] like Figure 3 and Figure 4 As shown, in some embodiments, the grinding arm 10 further includes a housing 11, a second drive assembly 14, and a first drive assembly 13, which are at least partially disposed within the housing 11.

[0061] In this embodiment, the housing 11 includes a first portion 111, a second portion 112, and a third portion 113. The first portion 111 is used to house the second drive member 147, and the second portion 112 and the third portion 113 are used to house the first drive assembly 13 and the second drive assembly 14.

[0062] Specifically, the first part 111 includes a sidewall and an annular bottom wall, and the second driving member 147 is disposed within the space enclosed by the sidewall and the bottom wall. The first driving member 135 and the second driving member 147 are respectively connected to the first driving assembly 13 and the second driving assembly 14 through the space in the middle of the annular bottom wall. The inner end of the bottom wall of the first part 111 is bolted to the top end of the second part 112. The bottom end of the second part 112 is also bolted to the top end of the third part 113.

[0063] Both the second part 112 and the third part 113 are cylindrical in shape, extending through both ends. At least one bearing is provided between the outer wall of the top end of the second rotating shaft 141 and the inner wall of the second part 112, thereby connecting the second rotating shaft 141 to the housing 11. That is, the second rotating shaft 141 is positioned within the housing 11. By providing the second part 112, space is provided for the bearing between the second rotating shaft 141 and the housing 11, while ensuring that the corresponding portion of the second rotating shaft 141 within the third part 113 can be relatively tightly fitted to the housing 11, avoiding wasted space. The bottom end of the first drive assembly 13 and the grinding disc 15 protrude beyond the bottom end of the third part 113.

[0064] In some other alternative embodiments, the first part 111, the second part 112, and the third part 113 may also be integrally formed.

[0065] In some embodiments, the first drive assembly 13 further includes at least one universal joint 134, which is connected between the first drive member 135 and the top end of the first rotating shaft 131 to achieve different degrees of eccentric rotation of the first rotating shaft 131.

[0066] In this embodiment, there are two universal joints 134, and the first drive assembly 13 also includes a coupling 133. The two ends of the coupling 133 are respectively connected to the two universal joints 134. The universal joint 134 located at the top is connected to the output shaft of the first drive member 135, and the universal joint 134 located at the bottom is connected to the top of the first rotating shaft 131.

[0067] like Figure 5 As shown, in some embodiments, the first drive assembly 13 further includes a spring loading component 132, which is disposed between the first rotating shaft 131 and the grinding disk 15, for applying grinding pressure to the grinding disk 15 during the grinding process and flexibly adjusting the magnitude of the grinding pressure to avoid over-grinding.

[0068] Specifically, the first rotating shaft 131 is recessed from the bottom to the top to form a receiving groove 1311, and the spring loading component 132 is disposed in the receiving groove 1311.

[0069] The spring loading component 132 includes a loading spring 1321 and a loading shaft 1322. The loading shaft 1322 is movably disposed within a receiving groove 1311, and its bottom end is detachably connected to the grinding disc 15. By moving up and down within the receiving groove 1311, the loading force on the grinding disc 15 during the grinding process can be adjusted. The loading spring 1321 is confined within the receiving groove 1311 and sleeved on the loading shaft 1322.

[0070] Specifically, the two ends of the loading spring 1321 abut against the end face (stepped surface) inside the receiving groove 1311 and the end face of the loading shaft 1322, respectively, to achieve limiting. When the loading shaft 1322 moves up / down inside the receiving groove 1311, the loading spring 1321 sleeved on the loading shaft 1322 is compressed / extended accordingly, thereby applying / releasing grinding pressure to the grinding disc 15.

[0071] In this embodiment, the top end of the loading shaft 1322 is connected to the first rotating shaft 131 by two pins 1324, thereby achieving positioning within the receiving groove 1311 and preventing relative rotation between the loading shaft 1322 and the first rotating shaft 131. The loading shaft 1322 includes a first shaft segment 1322a, a second shaft segment 1322b, a third shaft segment 1322c, and a fourth shaft segment 1322d from top to bottom. The diameters of the first shaft segment 1322a, second shaft segment 1322b, and third shaft segment 1322c gradually increase, and all are located within the receiving groove 1311. A guide groove A parallel to its axis is formed on the first shaft segment 1322a, allowing one end of the pin 1324 to be moved back and forth within the guide groove A, enabling the loading shaft 1322 to move up and down within the receiving groove 1311. A loading spring 1321 is sleeved on the first shaft segment 1322a and the second shaft segment 1322b. The two ends of the loading spring 1321 abut against the top of the receiving groove 1311 and the connection point between the second shaft segment 1322b and the third shaft segment 1322c, respectively, thereby limiting the loading spring 1321 within the receiving groove 1311. The fourth shaft segment 1322d has a smaller diameter than the third shaft segment 1322c and passes through the bottom of the receiving groove 1311. The fourth shaft segment 1322d extends outward from the bottom of the receiving groove 1311 by the movement of the pin 1324 within the guide groove A. A grinding disc 15 is detachably mounted at the bottom of the fourth shaft segment 1322d.

[0072] During grinding, the grinding disc 15 is brought into contact with the sealing surface to be ground. Upon initial contact, the fourth shaft segment 1322d of the loading shaft 1322 is entirely outside the receiving groove 1311. At this point, the fixed position height of the grinding arm 10 can be adjusted to apply a downward force, causing the fourth shaft segment 1322d to move into the receiving groove 1311 under external pressure. During this process, the loading spring 1321 is continuously compressed within the receiving groove 1311, thereby gradually increasing the reverse force applied to the loading shaft 1322; this reverse force is the loading force. By adjusting the length of the fourth shaft segment 1322d outside the receiving groove 1311, the pressure applied to the grinding disc 15 can be adjusted.

[0073] Furthermore, the bottom end of the loading shaft 1322 is provided with multiple loading force markings spaced axially. These markings are exposed outside the receiving groove, and different markings represent different elastic forces of the loading spring 1321, i.e., the pressure applied by the grinding disc 15. The magnitude of this force can be calculated using the relative spacing between the markings and the elastic coefficient of the loading spring 1321. By observing the number of loading force markings exposed at the bottom end of the loading shaft 1322, the pressure applied by the grinding disc 15 during the grinding process can be determined.

[0074] In some embodiments, the loading spring 1321 may be selected from components with elastic properties such as bellows and springs, and no limitation is made here.

[0075] See also Figure 2 In this embodiment, multiple annular markings are evenly spaced along the axial direction on the fourth shaft segment 1322d of the loading shaft 1322, which can represent 50N, 100N, 150N, 200N, etc., and increase evenly in a stepped manner.

[0076] In some other alternative embodiments, the receiving groove 1311 on the first rotating shaft 131 may also be configured as a through hole with both the top and bottom ends open.

[0077] For example Figure 5 As shown, in some embodiments, the spring loading component 132 further includes a limiting nut 1323, which abuts against the loading shaft 1322 in the axial direction and is threadedly connected to the inner side of the bottom end of the first rotating shaft 131. This is to limit the loading shaft 1322 in the axial direction and prevent the loading shaft 1322 from completely dislodging from the receiving groove 1311.

[0078] In this embodiment, the inner diameter of the limiting nut 1323 is adapted to the outer diameter of the fourth shaft segment 1322d, thereby preventing the third shaft segment 1322c from moving further downward when it reaches the position of the loading nut 1323. That is, the loading shaft 1322 reaches its lower limit of movement at this point.

[0079] It should be understood that, except for the pin 1324 and the limiting nut 1323, there is a gap (interval setting) between the spring loading component 132 and the inner wall of the first rotating shaft 131 at other positions to ensure the smooth movement of the loading shaft 1322 within the receiving groove 1311.

[0080] For example Figure 3 and Figure 4 As shown, in some embodiments, the second drive assembly 14 further includes a transition flange 146, which is connected to the second drive member 147 and the second rotating shaft 141 respectively, for outputting power to the second drive member 147.

[0081] In this embodiment, the first drive member 135 is disposed on the second drive member 147 and is located on the side of the second drive member 147 away from the transition flange 146. The output shaft of the first drive member 135 passes through the central flange hole of the transition flange 146 and is connected to the coupling 133.

[0082] It should be understood that both the first drive component 135 and the second drive component 147 can achieve the above effects using existing technologies.

[0083] like Figure 5 As shown, in some embodiments, the second drive assembly 14 further includes an eccentricity adjustment ring 143, which is fixed on the eccentricity adjustment shaft 142 and used to adjust the angle of the eccentricity adjustment shaft 142 within the second rotating shaft 141, thereby realizing the adjustment of the eccentricity of the grinding arm 10.

[0084] Specifically, the bottom end of the eccentricity adjustment shaft 142 extends to the outside of the bottom end of the second rotating shaft 141, and the eccentricity adjustment ring 143 is sleeved on the bottom end of the eccentricity adjustment shaft 142, with the two fixed relative to each other. The eccentricity adjustment shaft 142 can be rotated within the second drive assembly 14 by turning the eccentricity adjustment ring 143, thereby achieving eccentricity adjustment.

[0085] It is important to understand that, regarding the adjustment of eccentricity, since the axis of the outer wall of the second rotating shaft 141 is parallel and spaced apart from the axis of its inner hole, the axis of the outer wall of the eccentricity adjustment shaft 142 located within the second rotating shaft 141 is also parallel and spaced apart from the axis of the outer wall of the second rotating shaft 141. Simultaneously, since the axis of the outer wall of the eccentricity adjustment shaft 142 is parallel and spaced apart from the axis of its inner hole, there are multiple possibilities regarding the alignment between the axis of the inner hole of the eccentricity adjustment shaft 142 and the axis of the outer wall of the second rotating shaft 141. Because the eccentricity adjustment shaft 142 is rotatably mounted within the second rotating shaft 141, it can be rotated to make the axis of the inner hole of the eccentricity adjustment shaft 142 coaxial with the axis of the outer wall of the second rotating shaft 141. In this case, the first rotating shaft 131 located within the eccentricity adjustment shaft 142 is also coaxial with the axis of the outer wall of the second rotating shaft 141; this rotation is called self-rotation. When the eccentricity adjustment shaft 142 rotates, the axis of the inner hole of the eccentricity adjustment shaft 142 is parallel and spaced apart from the axis of the outer wall of the second rotating shaft 141. At this time, the first rotating shaft 131 located inside the eccentricity adjustment shaft 142 is also parallel and spaced apart from the axis of the outer wall of the second rotating shaft 141. This rotation is called revolution.

[0086] In this embodiment, the bottom end of the eccentricity adjustment ring 143 is located outside the bottom end of the housing 11 and the bottom end of the second rotating shaft 141, so that the eccentricity adjustment ring 143 is located outside the housing 11 and the second rotating shaft 141. The top end of the eccentricity adjustment shaft 142 is connected to the top end of the first rotating shaft 131 by two bearings, and the bottom end of the eccentricity adjustment shaft 142 is connected to the bottom end of the first rotating shaft 131 by one bearing.

[0087] It should be understood that the eccentricity adjustment shaft 142 can use an existing eccentric bearing housing.

[0088] In some other alternative embodiments, the eccentricity adjustment ring 143 may not be set as a ring. Instead, a plate-like structure, column-like structure, or other protrusions may be provided on the outer side of the bottom end of the eccentricity adjustment shaft 142. When eccentricity adjustment is required, the protrusions can be moved to achieve rotation of the eccentricity adjustment shaft 142 within the second drive assembly 14, thereby achieving eccentricity adjustment.

[0089] It should be understood that, in this embodiment, the eccentricity adjusting ring 143 is fixed to the eccentricity adjusting shaft 142 by bolts, thereby achieving synchronous rotation. In some other optional embodiments, the two can also be fixed to each other by integral molding, welding, or other methods.

[0090] Furthermore, the second drive assembly 14 also includes an adjusting shaft protective sleeve 144. It is circumferentially disposed between the second rotating shaft 141 and the eccentricity adjusting shaft 142, with the three components sequentially fitted together, forming an overall columnar structure. The adjusting shaft protective sleeve 144 is spaced apart from at least a portion of the eccentricity adjusting shaft 142.

[0091] During the grinding process, the second drive assembly 14 only rotates on its own axis, while the first drive assembly 13 both revolves and rotates on its own axis. Therefore, there is a relative force between the first drive assembly 13 and the second drive assembly 14. At this time, the eccentricity adjustment shaft 142, located at the connection between the first drive assembly 13 and the second drive assembly 14, is easily damaged, making it difficult to adjust the eccentricity. By providing a protective sleeve 144 for the adjustment shaft, and spacing the protective sleeve 144 from the eccentricity adjustment shaft 142, the driving force from the second rotating shaft 141 during the grinding process is absorbed, thus protecting the eccentricity adjustment shaft 142.

[0092] Specifically, the adjusting shaft protective sleeve 144 is detachably connected to the second rotating shaft 141 and the eccentricity adjusting shaft 142, thereby realizing the transmission of rotational driving force.

[0093] It should be understood that "the adjustment shaft protective sleeve 144 and at least part of the eccentricity adjustment shaft 142 are spaced apart" can be interpreted as the adjustment shaft protective sleeve 144 and the eccentricity adjustment shaft 142 being spaced apart on the shaft segments where they partially overlap. The length of this shaft segment can be set according to specific circumstances. For example, except for the necessary connection at the upper end of the shaft, most of the remaining length range can be spaced apart to achieve the protective effect.

[0094] In this embodiment, the adjusting shaft protective sleeve 144 and the second rotating shaft 141 are connected by bolts to achieve synchronous rotation. The adjusting shaft protective sleeve 144 has a horizontally provided cut slit near its bottom end, dividing it axially into a main body 1441 and a connecting part 1442. The connecting part 1442 is approximately annular and is located at the bottom end of the main body 1441, partially connected to it.

[0095] Furthermore, a connecting seam is formed along the axial direction on the connecting part 1442, making the connecting part 1442 approximately an arc-shaped structure with its ends spaced apart. Bolt holes are provided on both sides of the connecting seam (the two ends of the connecting part 1442). During the grinding process, bolts are simultaneously inserted into these bolt holes, and the width of the connecting seam is adjusted by tightening the bolts, thereby locking the connecting part 1442 onto the eccentricity adjustment shaft 142, achieving relative positioning and synchronous rotation of the two. When eccentricity adjustment is required, the bolts are loosened, releasing the locking of the connecting part 1442 onto the eccentricity adjustment shaft 142. At this time, the eccentricity can be adjusted by rotating the eccentricity adjustment ring 143 and rotating the eccentricity adjustment shaft 142.

[0096] In some other alternative embodiments, the adjusting shaft protective sleeve 144 may also be bolted to the eccentricity adjusting shaft 142.

[0097] It should be noted that in this embodiment, the bottom end of the adjusting shaft protective sleeve 144 extends beyond the bottom end of the second rotating shaft 141 and the outer shell 11, and the portion outside the second rotating shaft 141 is also connected to the bottom end of the third part 113 of the outer shell 11 via a bearing. This ensures that both the top and bottom ends of the second drive assembly 14 are connected to the outer shell 11 via bearings, guaranteeing the stability of the second drive assembly 14 within the outer shell 11 during the grinding process.

[0098] It should be understood that, in order to ensure the controllability of the eccentricity adjustment, the protective sleeve 144 of the adjustment shaft is a concentric shaft.

[0099] In this embodiment, the adjusting shaft protective sleeve 144 is made of copper.

[0100] In some embodiments, the second drive assembly 14 further includes a bearing cap 145, which is disposed at the top end of the eccentricity adjustment shaft 142 and is bolted to the eccentricity adjustment shaft 142. This cap is used to limit the eccentricity adjustment shaft 142 and the adjustment shaft protective sleeve 144 in the axial direction.

[0101] Specifically, the bearing cap 145 is located axially between the second rotating shaft 141 and the eccentricity adjusting shaft 142. The adjusting shaft protective sleeve 144 is axially positioned between the eccentricity adjusting shaft 142 and the eccentricity adjusting ring 143. Due to the connection between the adjusting shaft protective sleeve 144, the second rotating shaft 141, and the housing 11, even if there are no limiting components at the bottom ends of the eccentricity adjusting shaft 142 and the eccentricity adjusting ring 143, limiting can be achieved in both axial directions, that is, the overall second drive assembly 14 is axially limited.

[0102] For example Figure 7As shown, in some embodiments, the bottom end of the adjusting shaft protective sleeve 144 is located on the outer side of the portion outside the housing 11, and a reference mark 1443 is provided thereon. The outer side of the eccentricity adjusting ring 143 is provided with a plurality of eccentricity indicator marks 1431 spaced circumferentially. By providing the reference mark 1443 and the eccentricity indicator marks 1431, the eccentricity can be flexibly adjusted according to the grinding requirements.

[0103] Specifically, during the adjustment process, the eccentricity adjustment shaft 142 and the eccentricity adjustment ring 143 rotate synchronously. Therefore, different eccentricity indicator marks 1431 on the eccentricity adjustment ring 143 can accurately indicate different degrees of eccentricity of the eccentricity adjustment shaft 142. Among them, the eccentricity indicator mark 1431 corresponding to the reference mark 1443 represents the current degree of eccentricity of the eccentricity adjustment shaft 142. The synchronization between the eccentricity adjustment shaft 142 and the eccentricity adjustment ring 143 allows different eccentricity indicator marks 1431 to point to the reference mark 1443.

[0104] In this embodiment, the reference mark 1443 is located at a radial position on the outer end face of the bottom of the adjusting shaft protective sleeve 144. The eccentricity indicator mark 1431 includes multiple eccentricity value points, which are evenly spaced along the circumference of the eccentricity adjusting ring 143. During use, the value shown at the value point corresponding to the reference mark 1443 is the eccentricity value in this state.

[0105] Specifically, the eccentricity value of the eccentricity indicator 1431 may include 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, etc.

[0106] It should be understood that the reference mark 1443 and / or the eccentricity indicator mark 1431 and / or the loading force mark can be formed by setting marking grooves on the components (adjusting shaft protective sleeve 144, eccentricity adjusting ring 143, loading shaft 1322), or by affixing marking stickers to the components, etc. No limitation is made here.

[0107] like Figure 6As shown, in some embodiments, the grinding disc 15 includes a disc body 151, a connecting flange 152, an assembly 153, and a limiting member 154. The connecting flange 152 is generally trumpet-shaped, and the disc body 151 is detachably disposed at the bottom end of the connecting flange 152. The connecting flange 152 is cylindrical with both ends extending through it, and two mounting grooves 1521 are formed on the opposite sidewalls at its top. The assembly 153 is detachably connected to the flange via these mounting grooves 1521. The mounting groove 1521 is generally N-shaped, with one end extending through the top of the connecting flange 152. The bottom end of the fourth shaft segment 1322d of the loading shaft 1322 is recessed towards the top to form a threaded groove. The assembly 153 is generally cylindrical, with threads formed on its outer end face, and is threadedly connected to the fourth shaft segment 1322d of the loading shaft 1322. The limiting member 154 is a longitudinal column, horizontally inserted at the bottom of the assembly 153, with both ends protruding from the assembly 153.

[0108] By using the connecting flange 152, the fitting 153, and the limiting component 154, the grinding disc 15 can be quickly disassembled and assembled, facilitating the replacement of sandpaper and the grinding disc, and further improving grinding efficiency.

[0109] like Figures 1 to 3 As shown, in some embodiments, the grinding arm 10 further includes a depth adjustment ring 12, which is movably fitted onto the housing 11 and used to fix the grinding arm 10 in conjunction with a fixing device during use. The fixed height of the grinding arm 10 can be adjusted by adjusting its axial position on the housing 11. This ensures that after the grinding arm 10 is installed on the fixing device, the grinding disc 15 can grind the sealing surface of the valve.

[0110] Specifically, in this embodiment, the depth adjustment ring 12 is arranged in a non-closed arc shape, with corresponding bolt grooves formed at both ends. By inserting bolts, the width of the gap between the two ends of the depth adjustment ring 12 is adjusted, thereby locking and loosening the depth adjustment ring 12 and the outer shell 11. This achieves the axial position of the depth adjustment ring 12 on the outer shell 11.

[0111] like Figure 1 and Figure 8 As shown, in some embodiments, the grinding device 1 further includes a grinding arm support assembly 20, on which the grinding arm 10 is detachably mounted to achieve support and positioning of the grinding arm 10 during the grinding process.

[0112] Specifically, the grinding arm support assembly 20 includes a frame 21, a transmission assembly 22, a mounting bracket 23, and a drive assembly 24. Both the transmission assembly 22 and the drive assembly 24 are mounted on the frame 21. The mounting bracket 23 is connected to the transmission assembly 22, and the grinding arm 10 is detachably mounted on the mounting bracket 23. The drive end of the drive assembly 24 is connected to the transmission assembly 22, and the transmission assembly 22 can drive the mounting bracket 23 to reciprocate along the extension direction of the frame 21, thereby adjusting the fixed height of the grinding arm 10.

[0113] In this embodiment, the frame 21 is longitudinally elongated. The transmission assembly 22 includes a lead screw 221 and a nut seat 222. The lead screw 221 is vertically mounted on the frame 21, and the nut seat 222 is movably mounted on the lead screw 221. The drive assembly 24 is located at the top of the frame 21 and connected to the lead screw 221, used to drive the lead screw 221 to rotate, thereby enabling the nut seat 222 to move up and down along the lead screw 221. The mounting bracket 23 is mounted on the nut seat 222 and has a mounting hole formed in the vertical direction, and the grinding arm 10 is detachably mounted in the mounting hole.

[0114] Furthermore, when the grinding arm 10 is assembled on the mounting bracket 23, the depth adjustment ring 12 on the grinding arm 10 abuts against the mounting bracket 23, thereby achieving relative positioning of the grinding arm 10 and the mounting bracket 23, preventing the grinding arm 10 from coming off during the grinding process and causing damage to the equipment and valves.

[0115] Furthermore, the drive assembly 24 includes a drive motor 241 and a reducer 242. The output shaft of the drive motor 241 is connected to the lead screw 221. The reducer 242 is mounted on the drive motor 241 to reduce the rotational speed of the drive motor 241's output shaft, allowing the nut seat 222 to move slowly along the lead screw 221, so that the grinding disc 15 can make smooth contact with the sealing surface, avoiding collisions. Simultaneously, it can also slowly and precisely adjust the pressure applied by the grinding disc 15 to the sealing surface.

[0116] It should be understood that both the drive motor 241 and the reducer 242 can adopt existing technologies.

[0117] In one specific embodiment, the output power of the drive motor 241 can be 0.4kw, and the reduction ratio of the reducer 242 is 5:1, so that the maximum speed at which the nut seat 222 moves on the lead screw 221 is 3m / min.

[0118] like Figure 1 As shown, in some embodiments, the grinding arm support assembly 20 further includes at least one positioning element 25, which is disposed on the frame 21 to limit the distance the mounting frame 23 moves, and to prevent the mounting frame 23 from abutting against the bottom end of the lead screw 221 and causing damage.

[0119] In this embodiment, the frame 21 has multiple mounting points on its side surface without the transmission assembly 22. The positioning member 25 is detachably connected to the mounting points, making its position on the frame 21 adjustable.

[0120] Specifically, the dimensions of the transmission assembly 22 and the frame 21 are designed such that the moving length of the mounting bracket 23 can reach 300mm to meet the usage requirements of different valves.

[0121] It should be understood that the mounting point can be any structure that allows for a detachable connection with the positioning element 25, such as a mounting hole, mounting groove, or mounting protrusion. The positioning element 25 can be a mechanical limiting element that protrudes from one side of the transmission assembly 22, preventing the mounting bracket 23 from moving further when it reaches that position. Alternatively, it can be an electrically controlled limiting element, such as one detected by a sensor, that transmits a control signal to the drive assembly 24 to stop the drive assembly 24. No specific limitations are specified here.

[0122] By setting up the grinding arm support assembly 20, the height position of the grinding arm 10 in the tooling state can be flexibly adjusted, so that it can be used for different valves and avoid frequent replacement of the fixing equipment of the grinding arm 10.

[0123] like Figure 2 As shown, in some embodiments, the grinding device 1 further includes an online grinding fixing component 30. The grinding arm 10 can cooperate with the online grinding fixing component 30 to grind the valve sealing surface that is not disassembled in the system, thereby eliminating the need to remove the valve from the system and transport it to the maintenance room for grinding, simplifying the operation process and significantly saving critical path time during overhauls. It can also avoid the difficulty of using the grinding arm support component 20 to perform online grinding of the valve due to the restriction of the valve's safe position in the system (when the setting position allows, the grinding arm support component 20 can also be used to support and position the grinding arm 10 to implement online grinding).

[0124] Specifically, the online grinding fixing assembly 30 includes a chuck component 31 and a support flange 32. The support flange 32 is detachably mounted on the valve and serves to support and connect the chuck component 31. The chuck component 31 is detachably mounted on the support flange 32 and detachably connected to the grinding arm 10, thereby achieving the positioning of the grinding arm 10.

[0125] Specifically, the support flange 32 is cylindrical, including an annular bottom wall and cylindrical side walls. The bottom end of the side wall is connected to the outer end of the bottom wall. Multiple bolt holes adapted to the bolt holes on the valve are formed on the bottom wall, and the two are connected by bolts. The chuck component 31 is disposed at the top of the side wall and abuts against it. The grinding arm 10 is detachably disposed on the chuck component 31 and passes through both the chuck component 31 and the support flange 32.

[0126] The chuck component 31 includes a first chuck 311, a first clamping sleeve (not shown in the figure), and a first locking ring 312. The first clamping sleeve is annular and fixed inside the first chuck 311, and is used to fit over the outer shell 11 of the grinding arm 10 during assembly. The first locking ring 312 is located on the outer periphery of the first clamping sleeve. By inserting bolts through both ends of the first locking ring 312, the gap between the two ends can be adjusted to clamp the grinding arm 10. This achieves a detachable connection between the chuck component 31 and the grinding arm 10.

[0127] The first chuck 311 includes three jaws for abutting against the side wall of the support flange 32, thereby enabling a detachable connection between the chuck component 31 and the support flange 32.

[0128] In this embodiment, during assembly, the depth adjustment ring 12 of the grinding arm 10 is located on the upper side of the chuck component 31 and abuts against the first clamping sleeve and the first locking ring 312, thereby achieving the positioning of the grinding arm 10. Simultaneously, the first clamping sleeve and the first locking ring 312 also reduce vibrations generated during the grinding process, preventing damage to the equipment.

[0129] It should be understood that the first clamping sleeve and the first locking ring 312 are made of copper, which is lightweight and soft, thus avoiding damage to the outer wall of the grinding arm 10.

[0130] Meanwhile, since the grinding arm 10 is relatively light, it can be positioned by the first clamping sleeve and the first locking ring 312, without the need to consider using a material with a high coefficient of friction.

[0131] For different valves, the grinding arm 10 can be fixed by replacing the corresponding support flange 32 without replacing the entire grinding device 1. For different support flanges 32, only the depth of the three jaws of the first chuck 311 needs to be adjusted so that the three jaws abut against the side wall of the support flange 32 to achieve positioning.

[0132] In some embodiments, at least one observation window 321 is also provided through the side wall of the support flange 32 along the thickness direction to observe the grinding situation in real time during the grinding process and determine whether a new grinding disc 15 needs to be replaced.

[0133] like Figure 1 and Figure 9 As shown, in some embodiments, the grinding device 1 further includes an offline grinding fixing component 40 for fixing the valve (i.e., the offline valve) after it has been removed from the system during grinding. Simultaneously, the grinding arm support component 20 fixes the grinding arm 10, achieving dual positioning of the grinding equipment and the equipment being ground throughout the grinding process, ensuring stable grinding.

[0134] Specifically, such as Figure 1 As shown, the offline grinding fixing assembly 40 includes a base 41, a second chuck 42, a valve body fixing flange (not shown), and a valve disc fixing component 43. The second chuck 42 and the grinding arm support assembly 20 are detachably connected to the base 41 to ensure mutual positioning during offline grinding. The second chuck 42 can be detachably connected to the valve body fixing flange and the valve disc fixing component 43 for fixing during offline grinding. The valve body fixing flange and the valve disc fixing component 43 are selectively used during offline grinding. The valve body fixing flange is used to position the valve body when offline grinding the sealing surface of the valve body. The valve disc fixing component 43 is used to position the valve disc when offline grinding the sealing surface of the valve disc.

[0135] With the offline grinding fixing component 40 and the online grinding fixing component 30, the grinding device 1 can perform both offline grinding and online grinding, allowing for flexible selection based on different system operating conditions and valve conditions.

[0136] It is important to understand that "offline grinding" in this application refers to grinding the device after it has been disassembled from the system. "Online grinding" in this application refers to grinding the device while it is still installed in the system.

[0137] In this embodiment, the valve body fixing flange is roughly circular in shape, with multiple bolt holes along its thickness direction corresponding to the bolt holes on the valve body, and the two are connected by bolts. During offline grinding of the valve body, the valve body is fixed by assembling the valve body fixing flange at the bottom of the valve body and locking it in the three jaws of the second chuck 42.

[0138] For different valve body models, only the valve body mounting flange needs to be replaced. For different valve body mounting flanges, the position of the three jaws of the second chuck 42 can be adjusted to secure the valve body mounting flange.

[0139] like Figure 9As shown, in some embodiments, the valve disc fixing component 43 includes a valve disc mounting seat 431, a second clamping sleeve 432, and a second locking ring 433. The valve disc mounting seat 431 supports the second clamping sleeve 432 and the second locking ring 433, and accommodates the valve disc.

[0140] In this embodiment, the valve disc mounting base 431 is a cylindrical structure extending vertically. When the valve disc fixing component 43 is mounted on the second chuck 42, the bottom end of the valve disc mounting base 431 abuts against the three jaws of the second chuck 42. The second clamping sleeve 432 is annular and located at the top of the valve disc mounting base 431. The second locking ring 433 is fitted over the second clamping sleeve 432 and is arc-shaped with its two ends spaced apart. Bolts pass through both ends of the ring. During the clamping and fixing of the valve disc, the gap between the two ends is reduced by tightening the bolts, thereby achieving the locking and fixing of the valve disc.

[0141] It should be understood that the parts of the first clamping sleeve corresponding to the first locking ring 312 and the parts of the second clamping sleeve 432 corresponding to the second locking ring 433 are all provided with multiple through grooves in the circumferential direction, so that when the locking ring is locked and contracted, the width of the through grooves decreases accordingly, so that the clamping sleeve can be contracted.

[0142] For different models of valve discs, only the valve disc fixing component 43 of different sizes needs to be replaced; there is no need to replace the entire grinding device 1. For different sizes of valve disc fixing components 43, only the opening and closing degree of the three jaws needs to be adjusted when assembling with the second chuck 42.

[0143] It should be understood that both the first chuck 311 and the second chuck 42 can adopt existing technologies.

[0144] It's important to understand that the sealing surfaces of a valve include: the valve body stepped surface, the valve core surface, and the valve disc surface. The valve body stepped surface and the valve core surface are both sealing surfaces on the valve body, while the valve disc surface is the sealing surface on the valve disc. Sealing surfaces on the valve body can be ground using either in-line or offline methods. Sealing surfaces on the valve disc, however, can only be ground offline.

[0145] The valve body stepped surface and the valve core surface are coaxially arranged on the valve body, with the valve core surface being deeper than the valve body stepped surface. Therefore, during online grinding of the valve body, the depth of the valve body stepped surface and valve core surface can be adjusted by changing the depth adjusting ring 12 and / or replacing the support flange 32 with different heights. During offline grinding of the valve body, the depth of the valve body stepped surface and valve core surface can be adjusted by adjusting the depth adjusting ring 12 and / or adjusting the height of the mounting bracket 23 on the transmission assembly 22.

[0146] It should be understood that the grinding device 1 can be equipped with a dedicated electrical control cabinet to control the electrical components within the grinding device 1, thereby enabling the adjustment of the grinding speed and grinding pressure.

[0147] It is understood that the above embodiments only illustrate some implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A grinding apparatus, characterized in that, Includes a grinding arm (10), said grinding arm (10) comprising: The first drive assembly (13) includes a first rotating shaft (131) and a first drive member (135), wherein the first rotating shaft (131) is connected to the first drive member (135); The second drive assembly (14) includes a second rotating shaft (141), an eccentricity adjustment shaft (142), and a second drive member (147). The eccentricity adjustment shaft (142) is sleeved outside the first rotating shaft (131); the second rotating shaft (141) is sleeved outside the eccentricity adjustment shaft (142) and connected to the second drive member (147); and The grinding disc (15) is detachably connected to the bottom end of the first rotating shaft (131); The second rotating shaft (141) and the eccentricity adjustment shaft (142) are both eccentric shafts, and the eccentricity adjustment shaft (142) is rotatably disposed within the second rotating shaft (141). The first rotating shaft (131) is recessed from the bottom to the top to form a receiving groove (1311). The first driving assembly (13) also includes a spring loading component (132) disposed in the receiving groove (1311). The spring loading component (132) includes a loading spring (1321) and a loading shaft (1322). The loading shaft (1322) is movably disposed in the receiving groove (1311) and its bottom end is connected to the grinding disc (15). The loading spring (1321) is sleeved on the loading shaft (1322), and both ends of the loading spring (1321) abut against the end faces of the receiving groove (1311) and the loading shaft (1322), respectively. The second drive assembly (14) further includes a transition flange (146), which is connected to the second drive member (147) and the second rotating shaft (141) respectively; the output shaft of the first drive member (135) and / or the first drive assembly (13) passes through the transition flange (146).

2. The grinding apparatus according to claim 1, characterized in that, The second drive assembly (14) further includes an eccentricity adjustment ring (143), the bottom end of the eccentricity adjustment shaft (142) extends to the bottom end of the second rotating shaft (141), and the eccentricity adjustment ring (143) is fixed to the bottom end of the eccentricity adjustment shaft (142).

3. The grinding apparatus according to claim 2, characterized in that, The second drive assembly (14) further includes an adjustment shaft protective sleeve (144), which is disposed circumferentially between the second rotating shaft (141) and the eccentricity adjustment shaft (142), and is detachably connected to the second rotating shaft (141) and the eccentricity adjustment shaft (142) respectively; the adjustment shaft protective sleeve (144) is spaced apart from at least a portion of the eccentricity adjustment shaft (142).

4. The grinding apparatus according to claim 3, characterized in that, A reference mark (1443) is provided on the outer side of the bottom end of the adjusting shaft protective sleeve (144); the eccentricity adjusting ring (143) is located at the bottom end of the adjusting shaft protective sleeve (144), and multiple eccentricity indicator marks (1431) are provided on the outer side at circumferential intervals; the eccentricity adjusting ring (143) rotates synchronously with the eccentricity adjusting shaft (142) so that different eccentricity indicator marks (1431) can point to the reference mark (1443).

5. The grinding apparatus according to claim 1, characterized in that, The loading shaft (1322) includes a first shaft segment (1322a), a second shaft segment (1322b), and a third shaft segment (1322c) connected sequentially from top to bottom. The first shaft segment (1322a) is connected to the first rotating shaft (131). The shaft diameter of the third shaft segment (1322c) is larger than that of the first shaft segment (1322a) and the second shaft segment (1322b). The loading spring (1321) is sleeved on the first shaft segment (1322a) and the second shaft segment (1322b), and its two ends abut against the top of the receiving groove (1311) and the third shaft segment (1322c), respectively.

6. The grinding apparatus according to claim 1, characterized in that, The bottom end of the loading shaft (1322) is provided with multiple loading force markings spaced apart along the axial direction. Different loading force markings correspond to different elastic forces of the loading spring, and the loading force markings can be exposed in the receiving groove.

7. The grinding apparatus according to any one of claims 1 to 4, characterized in that, The grinding device further includes a grinding arm support assembly (20), which includes a frame (21), a transmission assembly (22), a drive assembly (24), and a mounting bracket (23) for fixing the grinding arm (10). The mounting bracket (23) is connected to the transmission assembly (22), which is mounted on the frame (21). The drive end of the drive assembly (24) is connected to the transmission assembly (22), and the drive assembly (24) drives the mounting bracket (23) to reciprocate along the extension direction of the frame (21) through the transmission assembly (22).

8. The grinding apparatus according to any one of claims 1 to 4, characterized in that, The grinding device further includes an online grinding fixing assembly (30), which includes a chuck component (31) for sleeved on the grinding arm (10) and a support flange (32) detachably mounted on the valve. The chuck component (31) is detachably connected to the support flange (32).

9. The grinding apparatus according to claim 8, characterized in that, The chuck component (31) includes a first chuck (311), a first locking ring (312), and a first clamping sleeve fitted on the grinding arm (10). The first clamping sleeve is disposed inside the first chuck (311), and the first locking ring (312) is fitted outside the first clamping sleeve. The first chuck (311) is detachably connected to the support flange (32).

10. The grinding apparatus according to claim 8, characterized in that, The grinding arm (10) also includes a housing (11) and a depth adjustment ring (12). The second drive assembly (14) and at least part of the first drive assembly (13) are disposed inside the housing (11). The depth adjustment ring (12) is movably sleeved on the housing (11) for positioning the setting height of the grinding arm (10).

11. The grinding apparatus according to claim 7, characterized in that, The grinding device further includes an offline grinding fixing assembly (40), which includes a base (41), a valve disc fixing component (44), a valve body fixing flange, and a second chuck (42) for fixing the valve disc fixing component (44) or the valve body fixing flange. The second chuck (42) and the grinding arm support assembly (20) are detachably mounted on the base (41).

12. The grinding apparatus according to claim 11, characterized in that, The valve disc fixing component (44) includes a valve disc mounting seat (431), a second locking ring (433), and a second clamping sleeve (432). The valve disc mounting seat (431) is cylindrical, the second clamping sleeve (432) is disposed on the valve disc mounting seat (431), and the second locking ring (433) is sleeved on the second clamping sleeve (432).

Images