Grinding device

Abstract

The invention relates to a grinding device which comprises a grinding arm, and the grinding arm comprises 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 piece, and the first rotating shaft is connected with the first driving piece; the second driving assembly comprises a second rotating shaft, an eccentricity adjusting shaft and a second driving piece, and the eccentricity adjusting shaft is arranged outside the first rotating shaft in a sleeving mode; the second rotating shaft is arranged outside the eccentricity adjusting shaft in a sleeving manner and is connected with the second driving piece; 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 both eccentric shafts, and the eccentricity adjusting shaft is rotatably arranged in the second rotating shaft. According to the grinding device, concentric circle grinding and eccentric splayed grinding can be achieved, the grinding efficiency is high, and the technology is standardized.

Description

Technical Field

[0001] The present application relates to the technical field of valve sealing, and more specifically, to a grinding device. Background Art

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

[0003] The existing grinding method is manual grinding, that is, using self-processed grinding jigs and grinding plates, combined with self-adhesive sandpaper, to perform concentric circle grinding. This grinding method has many shortcomings: 1. Manual grinding is inefficient: especially when there are large defects on the sealing surface, it takes a lot of manpower to eliminate the defects and grind, which increases the radiation dose of personnel. 2. The requirements for experience and techniques are extremely high: since it is impossible to measure the flatness and roughness of the sealing surface in real time, the manual grinding process has high requirements for the cleaning of the sealing surface, state observation, whether the sandpaper is changed, and the feel. Novices are very likely to make skill-based mistakes. 3. Manual grinding uses concentric circle rotation. Since the strength of the hand and the speed control cannot be uniform and accurate, it is very easy to have uneven grinding. 4. Manual grinding can only use concentric circle rotation for concentric circle grinding, and cannot achieve eccentric eight-shaped grinding with better grinding effect. Summary of the invention

[0004] The technical problem to be solved by the present 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 embodiment of the present application to solve the technical problem is:

[0006] A grinding device is constructed, comprising a grinding arm, wherein the grinding arm comprises:

[0007] A first driving assembly, comprising a first rotating shaft and a first driving member, wherein the first rotating shaft is connected to the first driving member;

[0008] A second driving assembly includes a second rotating shaft, an eccentricity adjusting shaft and a second driving member, wherein the eccentricity adjusting shaft is sleeved outside the first rotating shaft; the second rotating shaft is sleeved outside the eccentricity adjusting shaft and connected to the second driving member; and

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

[0010] Wherein, the second rotating shaft and the eccentricity adjustment shaft are both eccentric shafts, and the eccentricity adjustment shaft is rotatably disposed in 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 outside 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 also includes an adjusting shaft protective sleeve, which is circumferentially arranged 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 adjusting 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 surface of the bottom end of the adjusting shaft protective cover; the eccentricity adjustment ring is located at the bottom end of the adjusting shaft protective cover, and a plurality of eccentricity indication marks are provided on the outer side at circumferential intervals; the eccentricity adjustment ring rotates synchronously with the eccentricity adjustment shaft so that different eccentricity indication marks can point to the reference mark.

[0014] In some embodiments, the first rotating shaft is recessed from the bottom end toward the top end to form a receiving groove, and the first driving assembly also includes a spring loading component arranged in the receiving groove, and the spring loading component includes a loading spring and a loading shaft. The loading shaft is movably arranged in the receiving groove, and the bottom end is connected to the grinding disk. The loading spring is sleeved on the loading shaft, and the two ends of the loading spring are respectively abutted against the end faces of the receiving groove and the loading shaft.

[0015] In some embodiments, the loading shaft includes a first shaft segment, a second shaft segment and a third shaft segment connected in sequence 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 respectively larger than the shaft diameters of the first shaft segment and the second shaft segment; the loading spring is sleeved on the first shaft segment and the second shaft segment, and the two ends are respectively against the accommodating groove and the top end of the third shaft segment.

[0016] In some embodiments, a plurality of loading force marks are arranged at intervals along the axial direction at the bottom end of the loading shaft, and different loading force marks correspond to different elastic forces of the loading spring, and the loading force marks can expose the accommodating groove.

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

[0018] In some embodiments, the grinding device also includes a grinding arm support assembly, which includes a frame, a transmission assembly, a drive assembly, and a mounting frame for fixing the grinding arm, the mounting frame is connected to the transmission assembly, the transmission assembly is arranged on the frame, the driving end of the drive assembly is connected to the transmission assembly, and the drive assembly drives the mounting frame to reciprocate along the extension direction of the frame through the transmission assembly.

[0019] In some embodiments, the grinding device further includes an online grinding fixing assembly, which includes a chuck component for being sleeved on the grinding arm and a support flange detachably provided on the valve, and the chuck component is 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 mounted on the grinding arm, the first clamping sleeve is arranged in the first chuck, the first locking ring is mounted outside the first clamping sleeve, and the first chuck is detachably connected to the support flange.

[0021] In some embodiments, the grinding arm also includes a shell and a depth adjustment ring, the second drive component and at least a portion of the first drive component are disposed in the shell, and the depth adjustment ring is movably mounted on the shell to position the setting height of the grinding arm.

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

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

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

[0025] The present invention provides a second rotating shaft and an eccentric amount adjusting shaft, both of which are eccentric shafts, and drives the second rotating shaft and the first rotating shaft to rotate respectively through the second driving member and the first driving member, so that the present application can realize both concentric circle grinding and eccentric figure-eight grinding; the present application is driven by providing a driving assembly, and no manual grinding is required; the grinding accuracy and grinding efficiency are improved, the grinding effect is ensured, and at the same time the standardization of the grinding process is realized, reducing the manpower input. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the grinding device in an offline grinding state according to an embodiment of the present application;

[0028] Figure 2 It is a schematic diagram of the three-dimensional structure of the grinding device in an online grinding state according to an embodiment of the present application;

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

[0030] Figure 4 yes Figure 3 A magnified structural diagram of the P part;

[0031] Figure 5 yes Figure 3 The structure enlargement of the Q part in the figure;

[0032] Figure 6 yes Figure 3 The structure enlargement of the M part in FIG.

[0033] Figure 7 yes Figure 1 A magnified view of the structure of the N site;

[0034] Figure 8 yes Figure 1 A schematic cross-sectional structure diagram of a grinding arm support assembly;

[0035] Fig. 9 yes Figure 1 A schematic diagram of the cross-sectional structure of the offline grinding fixed component;

[0036] Reference numerals:

[0037] 1-grinding device; 10-grinding arm; 20-grinding arm support assembly; 30-online grinding fixed assembly; 40-offline grinding fixed assembly;

[0038] 11-housing; 111-first part; 112-second part; 113-third part; 12-depth adjustment ring; 13-first drive assembly; 131-first rotating shaft; 1311-accommodating groove; 132-spring loading component; 1321-loading spring; 1322-loading shaft; 1323-limiting nut; 1324-pin; 133-coupling; 134-universal joint; 135-first drive member; 1 4-second driving 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 pressure cover; 146-transition flange; 147-second driving member; 15-grinding disc; 151-disc body; 152-connecting flange; 1521-assembly groove; 153-assembly part; 154-limiting member;

[0039] 21-frame; 22-guide assembly; 221-screw rod; 222-nut seat; 23-mounting frame; 24-drive assembly; 241-drive motor; 242-reducer; 25-limiting member;

[0040] 31-chuck component; 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 DESCRIPTION

[0042] In order to have a clearer understanding of the technical features, purposes and effects of the present application, the specific implementation methods of the present application are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present application.

[0043] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0044] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0045] Figures 1 to 9 The present invention shows a grinding device 1, which can realize electric grinding of various valves in nuclear power plants. 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 drives the first drive assembly 13 to realize orbital revolution by its own rotation. The first drive assembly 13 realizes self-rotation by its own rotation. The self-rotation of the first drive assembly 13 cooperates with the orbital revolution driven by the second drive assembly 14 to realize the superposition of rotations, thereby realizing concentric circle grinding or eccentric eight-shaped grinding of the grinding disc 15. The grinding disc 15 is used to grind the sealing surface (valve body or valve disc) of the valve.

[0046] The first driving assembly 13 includes a first rotating shaft 131 and a first driving member 135. The first driving member 135 is used to drive 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 driving member 135, and the bottom end is detachably connected to the grinding disc 15. Through the detachable connection between the two, different grinding discs 15 can be replaced for different valves.

[0047] The second driving assembly 14 includes a second rotating shaft 141, an eccentricity adjustment shaft 142 and a second driving member 147. The eccentricity adjustment shaft 142 is sleeved on the outside of the first rotating shaft 131 through a bearing, and is used to adjust the eccentricity of the first rotating shaft 131 during the grinding process, and is used to drive the rotation of the second rotating shaft 141 to the first rotating shaft 131 to realize the revolution of the first rotating shaft 131. The second rotating shaft 141 is sleeved on the outside of the eccentricity adjustment shaft 142, and the top end is connected to the second driving member 147. The second driving member 147 is used to drive the second rotating shaft 141 to realize rotation.

[0048] It should be noted that the second rotating shaft 141 and the eccentricity adjustment shaft 142 are both eccentric shafts, and the eccentricity adjustment shaft 142 is rotatably disposed in 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 arranged to be non-coincident (such as Figure 3 As shown, Figure 3 The axis L in the figure is the axis of the second rotating shaft, and the axis S is the axis of the first rotating shaft), and in the grinding process, the rotation of the second rotating shaft 141 enables the first driving assembly 13 in the second rotating shaft 141 to realize the revolution. On this basis, the rotation of the first rotating shaft 131 is added, and the eccentric eight-shaped grinding can be realized.

[0050] By setting the eccentricity adjustment shaft 142 as an eccentric shaft and making the eccentricity adjustment shaft 142 rotatable in 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 in the second rotating shaft 141, that is, the eccentricity can be infinitely adjusted. Different eccentricities can be adjusted for different situations to achieve different degrees of eccentric eight-shaped grinding.

[0051] At the same time, when the eccentricity adjustment shaft 142 rotates to a position within the second rotating shaft 141 so 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, thereby achieving concentric circle grinding.

[0052] The grinding device 1 constructed in the present application can realize both concentric circle grinding and eccentric eight-shaped grinding. At the same time, it can be driven by the first driving member 135 and the second driving member 147, without manual grinding. The grinding accuracy is improved, the grinding effect is ensured, and the standardization of the grinding process is achieved, reducing the input of manpower. It avoids the influence of radiation on the operator during the long-term manual grinding process, as well as the problems of inaccurate grinding and failure to achieve a sealing effect.

[0053] It should be understood that an "eccentric shaft" refers to a hollow shaft (a shaft with a through hole formed in a direction parallel to the axis) with different wall thicknesses at different radial positions. That is, a shaft in which the axis of the through hole in the middle is parallel to the axis of the shaft. That is, a shaft in which the center points of the outer contour and the inner contour of the cross section do not coincide.

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

[0055] It should be understood that "top" and "bottom" refer to the positional relationship in the vertical position during the grinding process. Figure 1 and Figure 2 shown.

[0056] It should be understood that, in this embodiment, "rotation" means that the first rotating shaft 131 rotates with its own axis as the rotating axis, and the second rotating shaft 141 rotates with its own axis as the rotating axis. "Revolution" in this embodiment means that the first rotating shaft 131 rotates with the axis of the second rotating shaft 141 as the rotating axis, and the eccentricity adjustment shaft 142 rotates with the axis of the second rotating shaft 141 as the rotating axis.

[0057] It should be understood that for both "eccentric eight-shaped grinding" and "concentric circle grinding", if space permits (there is no wall restriction in the circumferential direction), eccentric eight-shaped grinding with good grinding effect can be used. If space is limited, concentric circle grinding should be used.

[0058] It should be understood that the grinding device 1 constructed in the present 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 the present application, and does not serve as a limitation on the application field of the present application.

[0059] In some embodiments, the first driving member 135 and the second driving member 147 can use existing driving devices such as motors to achieve rotational drive of the rotating shaft, which is not specifically limited here.

[0060] like Figure 3 and Figure 4 As shown, in some embodiments, the grinding arm 10 further includes a housing 11 , and the second driving assembly 14 and the first driving assembly 13 are at least partially disposed in 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 accommodate the second driving member 147 , and the second portion 112 and the third portion 113 are used to accommodate the first driving assembly 13 and the second driving assembly 14 .

[0062] Specifically, the first part 111 includes a side wall and an annular bottom wall, and the second driving member 147 is disposed in the space enclosed by the side wall 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 connected to the top of the second part 112 by bolts. The bottom end of the second part 112 is also connected to the top of the third part 113 by bolts.

[0063] The second part 112 and the third part 113 are both cylindrically connected at both ends. At least one bearing is arranged between the outer wall surface of the top of the second rotating shaft 141 and the inner wall surface of the second part 112, thereby realizing the connection between the second rotating shaft 141 and the housing 11. That is, the second rotating shaft 141 is positioned in the housing 11. By setting the second part 112, a bearing accommodation space between the second rotating shaft 141 and the housing 11 is provided, while ensuring that the corresponding part of the second rotating shaft 141 in the third part 113 and the housing 11 can be arranged relatively tightly to avoid space waste. The bottom end of the first driving component 13 and the grinding disc 15 protrude outside the bottom end of the third part 113.

[0064] In some other optional 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 driving assembly 13 further includes at least one universal joint 134, which is connected between the first driving member 135 and the top end of the first rotating shaft 131, so as to realize different degrees of eccentric rotation of the first rotating shaft 131.

[0066] In this embodiment, there are two universal joints 134, and the first driving assembly 13 further includes a coupling 133. Both ends of the coupling 133 are respectively connected to two universal joints 134. The universal joint 134 at the top is connected to the output shaft of the first driving member 135, and the universal joint 134 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 driving assembly 13 also includes a spring-loaded component 132, which is disposed between the first rotating shaft 131 and the grinding disc 15, and is used to apply grinding pressure to the grinding disc 15 during the grinding process and flexibly adjust the magnitude of the grinding pressure to avoid over-grinding.

[0068] Specifically, the first rotating shaft 131 is recessed from the bottom end to the top end 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 in the receiving groove 1311, and the bottom end is detachably connected to the grinding disc 15. By moving up and down in the receiving groove 1311, the loading force of the grinding disc 15 can be adjusted during the grinding process. The loading spring 1321 is limited in the receiving groove (1311) and is sleeved on the loading shaft 1322.

[0070] Specifically, the two ends of the loading spring 1321 are respectively in contact with the end surface (step surface) in the receiving groove 1311 and the end surface of the loading shaft 1322 to achieve position limiting. When the loading shaft 1322 moves up / down in the receiving groove 1311, the loading spring 1321 sleeved on the loading shaft 1322 is compressed / stretched 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 through two pins 1324, thereby realizing positioning in 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 section 1322a, a second shaft section 1322b, a third shaft section 1322c and a fourth shaft section 1322d from the top end to the bottom end. The diameters of the first shaft section 1322a, the second shaft section 1322b and the third shaft section 1322c gradually increase, and are all located in the receiving groove 1311. A guide groove A parallel to the axis of the first shaft section 1322a is formed, so that one end of the pin 1324 can be arranged in the guide groove A to move back and forth along the extension direction of the guide groove A, so that the loading shaft 1322 can move up and down in the receiving groove 1311. The loading spring 1321 is sleeved on the first shaft section 1322a and the second shaft section 1322b. The two ends of the loading spring 1321 are respectively against the top of the receiving groove 1311 and the connection between the second shaft section 1322b and the third shaft section 1322c, thereby realizing the limiting of the loading spring 1321 in the receiving groove 1311. The fourth shaft section 1322d has a smaller diameter than the third shaft section 1322c, and is penetrated at the bottom end of the receiving groove 1311. The fourth shaft section 1322d is extended outward from the bottom end of the receiving groove 1311 by the movement of the pin 1324 in the guide groove A. The grinding disc 15 is detachably arranged at the bottom end of the fourth shaft section 1322d.

[0072] When grinding, the grinding disc 15 is brought into contact with the sealing surface to be ground. When just in contact, the fourth shaft section 1322d of the loading shaft 1322 is entirely located outside the receiving groove 1311. At this time, the fixed position height of the grinding arm 10 can be adjusted, and a downward force can be applied to the grinding arm 10, so that the fourth shaft section 1322d moves into the receiving groove 1311 under external pressure. In this process, the loading spring 1321 is continuously compressed in the receiving groove 1311, and the reverse force applied to the loading shaft 1322 gradually increases, and the reverse force is the loading force. By adjusting the length of the fourth shaft section 1322d outside the receiving groove 1311, the pressure applied to the grinding disc 15 can be adjusted.

[0073] Furthermore, a plurality of loading force marks are provided at intervals along the axial direction at the bottom end of the loading shaft 1322. The loading force marks are exposed outside the receiving groove, and different loading force marks can represent different elastic forces of the loading spring 1321, that is, the pressure applied by the grinding disc 15. The magnitude of the force can be calculated by the relative spacing between the loading force marks and the elastic coefficient of the loading spring 1321. By checking the number of loading force marks exposed at the bottom end of the loading shaft 1322, the pressure applied by the grinding disc 15 during the grinding process can be known.

[0074] In some embodiments, the loading spring 1321 can be a component with elastic properties such as a bellows, a spring, etc., which is not limited here.

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

[0076] In some other optional embodiments, the receiving groove 1311 on the first rotating shaft 131 can also be configured as a through hole that penetrates both the top and the bottom.

[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, so as to limit the loading shaft 1322 in the axial direction and prevent the loading shaft 1322 from completely falling out of the receiving groove 1311.

[0078] In this embodiment, the inner diameter of the limiting nut 1323 matches the outer diameter of the fourth shaft segment 1322d, so that when the third shaft segment 1322c moves to the position where the loading nut 1323 is located, it cannot move downward further. That is, the loading shaft 1322 reaches the movable lower limit position here.

[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 to ensure the smooth movement of the loading shaft 1322 in the accommodating groove 1311 .

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

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

[0082] It should be understood that both the first driving member 135 and the second driving member 147 can use existing technologies to achieve the above effects.

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

[0084] Specifically, the bottom end of the eccentricity adjustment shaft 142 extends outside 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, and the two are relatively fixed. The eccentricity adjustment shaft 142 can be rotated in the second driving assembly 14 by twisting the eccentricity adjustment ring 143, that is, the eccentricity can be adjusted.

[0085] It should be understood that, for the adjustment of the eccentricity, since the axis of the outer wall of the second rotating shaft 141 is arranged in parallel and spaced apart from the axis of the inner hole, the axis of the outer wall of the eccentricity adjustment shaft 142 located in the second rotating shaft 141 is arranged in parallel and spaced apart from the axis of the outer wall of the second rotating shaft 141. At the same time, since the axis of the outer wall of the eccentricity adjustment shaft 142 is arranged in parallel and spaced apart from the axis of its inner hole, there are multiple possibilities 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. Since the eccentricity adjustment shaft 142 is rotatably arranged in the second rotating shaft 141, the axis of the inner hole of the eccentricity adjustment shaft 142 can be coaxially arranged with the axis of the outer wall of the second rotating shaft 141 by rotating the eccentricity adjustment shaft 142. At this time, the first rotating shaft 131 located in the eccentricity adjustment shaft 142 is also coaxially arranged with the axis of the outer wall of the second rotating shaft 141. The rotation at this time is self-rotation. When the eccentricity adjustment shaft 142 rotates so that the axis of the inner hole of the eccentricity adjustment shaft 142 is parallel to the axis of the outer wall of the second rotating shaft 141 and is spaced apart from each other, at this time, the first rotating shaft 131 located in the eccentricity adjustment shaft 142 is also parallel to the axis of the outer wall of the second rotating shaft 141 and is spaced apart from each other. The rotation at this time 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 through two bearings, and the bottom end of the eccentricity adjustment shaft 142 is connected to the bottom end of the first rotating shaft 131 through a bearing.

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

[0088] In some other optional embodiments, the eccentricity adjustment ring 143 may not be set in a ring shape. By protruding a plate-like structure, a columnar structure or other protrusions on the outer side of the bottom end of the eccentricity adjustment shaft 142, when the eccentricity adjustment is required, the protrusion can be moved, and the eccentricity adjustment shaft 142 can also be rotated in the second driving component 14, that is, the eccentricity can be adjusted.

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

[0090] Furthermore, the second drive assembly 14 also includes an adjusting shaft protective sleeve 144. The adjusting shaft protective sleeve 144 is circumferentially arranged between the second rotating shaft 141 and the eccentricity adjusting shaft 142. The three are sleeved and combined one by one, and the whole is a columnar structure. The adjusting shaft protective sleeve 144 is spaced apart from at least part of the eccentricity adjusting shaft 142.

[0091] Since the second drive assembly 14 only rotates itself during the grinding process, while the first drive assembly 13 revolves and rotates, 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 at the connection between the first drive assembly 13 and the second drive assembly 14 is easily damaged, and it is difficult to adjust the eccentricity. By setting the adjustment shaft protection sleeve 144 and setting the adjustment shaft protection sleeve 144 and the eccentricity adjustment shaft 142 at an interval, the eccentricity adjustment shaft 142 can withstand the driving force from the second rotating shaft 141 during the grinding process, so as to protect the eccentricity adjustment shaft 142.

[0092] Specifically, the adjusting shaft protection sleeve 144 is detachably connected to the second rotating shaft 141 and the eccentricity adjusting shaft 142 , respectively, so as to realize the transmission of the rotation driving force.

[0093] It should be understood that "the adjusting shaft protection sleeve 144 is spaced apart from at least part of the eccentricity adjusting shaft 142" can be understood as that the adjusting shaft protection sleeve 144 and the eccentricity adjusting shaft 142 are spaced apart on the shaft section where the two parts overlap. The length of the shaft section 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 protection effect.

[0094] In this embodiment, the adjusting shaft protective sleeve 144 is connected to the second rotating shaft 141 by bolts to achieve synchronous rotation. The adjusting shaft protective sleeve 144 is horizontally provided with a cutting seam near the bottom end, which separates the adjusting shaft protective sleeve 144 into a main body 1441 and a connecting portion 1442 in the axial direction. The connecting portion 1442 is roughly annular, arranged at the bottom end of the main body 1441, and partially connected to the main body 1441.

[0095] Furthermore, a connection seam is formed on the connection portion 1442 along the axial direction, so that the connection portion 1442 is roughly an arc-shaped structure arranged at intervals from head to tail. Bolt holes are provided on both sides of the connection seam (the two ends of the connection portion 1442). During the grinding process, bolts are simultaneously inserted into the bolt holes, and the width of the connection seam is adjusted by screwing the bolts, thereby achieving the locking of the connection portion 1442 on the eccentricity adjustment shaft 142, and achieving relative positioning and synchronous rotation of the two. When the eccentricity needs to be adjusted, the bolt is loosened so that the connection portion 1442 releases the locking of the eccentricity adjustment shaft 142. At this time, the eccentricity adjustment ring 143 can be rotated to rotate the eccentricity adjustment shaft 142, thereby achieving the adjustment of the eccentricity.

[0096] In some other optional embodiments, the adjusting shaft protective sleeve 144 may also be connected to the eccentricity adjusting shaft 142 via bolts.

[0097] It should be noted that, in this embodiment, the bottom end of the adjusting shaft protective sleeve 144 extends to the outside of the second rotating shaft 141 and the bottom end of the housing 11, and the portion located outside the second rotating shaft 141 is also connected to the bottom end of the third portion 113 of the housing 11 through a bearing. This allows the top and bottom ends of the second driving assembly 14 to be connected to the housing 11 through bearings, ensuring the stability of the second driving assembly 14 in the housing 11 during the grinding process.

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

[0099] In this embodiment, the material of the adjusting shaft protection sleeve 144 includes copper.

[0100] In some embodiments, the second driving assembly 14 further includes a bearing cover 145, which is disposed at the top of the eccentricity adjusting shaft 142 and is connected to the eccentricity adjusting shaft 142 by bolts, and is used to limit the eccentricity adjusting shaft 142 and the adjusting shaft protective sleeve 144 in the axial direction.

[0101] Specifically, the bearing cover 145 is located between the second rotating shaft 141 and the eccentricity adjusting shaft 142 at the upper limit in the axial direction. The adjusting shaft protection sleeve 144 is arranged between the eccentricity adjusting shaft 142 and the eccentricity adjusting ring 143 in the axial direction. Due to the connection between the adjusting shaft protection sleeve 144, the second rotating shaft 141 and the housing 11, even if the bottom ends of the eccentricity adjusting shaft 142 and the eccentricity adjusting ring 143 are not provided with limiting components, limiting can be achieved in both axial directions, that is, the overall second drive assembly 14 is limited in the axial direction.

[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 outer portion of the housing 11, and is provided with a reference mark 1443. The outer side surface of the eccentricity adjustment ring 143 is provided with a plurality of eccentricity indication marks 1431 at intervals along the circumferential direction. By providing the reference mark 1443 and the eccentricity indication mark 1431, the eccentricity can be flexibly adjusted according to the grinding requirements.

[0103] Specifically, during the adjustment process, the eccentricity adjustment shaft 142 rotates synchronously with the eccentricity adjustment ring 143, so different eccentricity indication marks 1431 on the eccentricity adjustment ring 143 can accurately indicate different eccentricity levels of the eccentricity adjustment shaft 142. Among them, the eccentricity indication mark 1431 corresponding to the reference mark 1443 represents the current eccentricity level of the eccentricity adjustment shaft 142. The synchronization of the eccentricity adjustment shaft 142 and the eccentricity adjustment ring 143 can enable different eccentricity indication 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 surface of the bottom end of the adjusting shaft protective sleeve 144. The eccentricity indicating mark 1431 includes a plurality of eccentricity value points, and the plurality of value points are evenly spaced and arranged on the circumference of the eccentricity adjusting ring 143. During use, the value shown by the value point corresponding to the reference mark 1443 is the eccentricity value in this state.

[0105] Specifically, the eccentricity value points of the eccentricity indication mark 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 indication mark 1431 and / or the loading force mark can be formed by setting a mark groove on the component (adjusting shaft protection sleeve 144, eccentricity adjustment ring 143, loading shaft 1322), or by affixing a label sticker on the component, etc. This is not limited here.

[0107] like Figure 6As shown, in some embodiments, the grinding disc 15 includes a disc body 151, a connecting flange 152, an assembly part 153 and a stopper 154. The connecting flange 152 is roughly trumpet-shaped, and the disc body 151 is detachably arranged at the bottom end of the connecting flange 152. The connecting flange 152 is arranged in a cylindrical shape with two ends passing through, and two assembly grooves 1521 are formed on the side wall parts opposite to the top, and the assembly part 153 is detachably connected to the two through the assembly grooves 1521. The assembly groove 1521 is roughly N-shaped, and one end thereof passes through the top of the connecting flange 152. The bottom end of the fourth shaft section 1322d of the loading shaft 1322 is recessed toward the top to form a threaded groove, and the assembly part 153 is roughly columnar, and a thread is formed on its outer end surface, and is threadedly connected to the fourth shaft section 1322d of the loading shaft 1322. The stopper 154 is in the shape of a vertically long column and horizontally penetrates the bottom end of the assembly part 153 , and has two ends protruding out of the assembly part 153 .

[0108] By providing the connecting flange 152, the assembly part 153 and the limiter 154, the grinding disc 15 can be quickly disassembled and assembled, which is convenient for replacing the sandpaper and the grinding disc, and further improving the 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 sleeved on the housing 11, and is used to fix the grinding arm 10 in cooperation with a fixing device during use. And by adjusting its position in the axial direction of the housing 11, the fixed height of the grinding arm 10 is adjusted. This ensures that when 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, and corresponding bolt grooves are formed at both ends thereof, and the width of the gap between the two ends of the depth adjustment ring 12 is adjusted by passing bolts to achieve the locking and loosening of the depth adjustment ring 12 and the housing 11, thereby achieving the position of the depth adjustment ring 12 in the axial direction of the housing 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, and the grinding arm 10 is detachably disposed on the grinding arm support assembly 20 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 frame 23 and a driving assembly 24. The transmission assembly 22 and the driving assembly 24 are both arranged on the frame 21. The mounting frame 23 is connected to the transmission assembly 22, and the grinding arm 10 is detachably arranged on the mounting frame 23. The driving end of the driving assembly 24 is connected to the transmission assembly 22, and the mounting frame 23 can be driven by the transmission assembly 22 to reciprocate along the extension direction of the frame 21, thereby realizing the adjustment of the fixed height of the grinding arm 10.

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

[0114] Furthermore, when the grinding arm 10 is assembled on the mounting frame 23, the depth adjustment ring 12 on the grinding arm 10 abuts against the mounting frame 23, thereby achieving relative limitation of the grinding arm 10 and the mounting frame 23, thereby preventing the grinding arm 10 from falling out 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 screw 221. The reducer 242 is arranged on the drive motor 241 to reduce the rotation speed of the output shaft of the drive motor 241, so that the nut seat 222 can move slowly along the screw 221, so that the grinding disc 15 can be in smooth contact with the sealing surface to avoid collision. At the same time, the pressure applied by the grinding disc 15 to the sealing surface can be slowly and accurately adjusted.

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

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

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

[0119] In this embodiment, a plurality of mounting points are arranged on the side end surface of the frame 21 where the transmission assembly 22 is not arranged, and the positioning member 25 is detachably connected to the mounting points so that its position on the frame 21 is adjustable.

[0120] Specifically, the dimensions of the transmission assembly 22 and the frame 21 are set so that the movable length of the mounting frame 23 can reach 300 mm, so as to meet the use requirements for different valves.

[0121] It should be understood that the installation point can be any structure that can be detachably connected to the positioning member 25, such as a mounting hole, a mounting groove, a mounting protrusion, etc. The positioning member 25 can be a mechanical stopper protruding from one side of the transmission component 22, so that when the mounting bracket 23 moves to this position, it abuts against it and cannot continue to move. It can also be a sensor, etc., which detects the mounting bracket 23, that is, transmits a control signal to the drive component 24, and controls the drive component 24 to stop driving. No specific limitation is made here.

[0122] By providing the grinding arm support assembly 20 , the height position of the grinding arm 10 in the work state can be flexibly adjusted, so that it can be used for different valves, avoiding 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 assembly 30, and the grinding arm 10 can cooperate with the online grinding fixing assembly 30 to grind the sealing surface of the valve that is not disassembled in the system, so that the valve does not need to be disassembled from the system and transported to the maintenance room for grinding, which simplifies the operation process and greatly saves the overhaul key path. It can also avoid the difficulty of using the grinding arm support assembly 20 to grind the valve online due to the limitation of the safe position of the valve in the system (when the setting position allows, the grinding arm support assembly 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 disposed on the valve for supporting and connecting the chuck component 31. The chuck component 31 is detachably disposed on the support flange 32 and detachably connected to the grinding arm 10, thereby realizing the positioning of the grinding arm 10.

[0125] Specifically, the support flange 32 is cylindrical, including an annular bottom wall and a cylindrical side wall, the bottom end of the side wall is connected to the outer end of the bottom wall, and a plurality of bolt holes matching the bolt holes on the valve are formed on the bottom wall, and the two are connected by bolts. The chuck component 31 is arranged at the top end of the side wall and abuts against the side wall. The grinding arm 10 is detachably arranged on the chuck component 31, and is penetrated in 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 arranged in an annular shape and is fixed in the first chuck 311. When assembled with the grinding arm 10, it is sleeved outside the housing 11 of the grinding arm 10. The first locking ring 312 is located at the outer periphery of the first clamping sleeve. Bolts are inserted through the two ends of the first locking ring 312 to adjust the gap between the two ends to achieve clamping of the grinding arm 10. In this way, the chuck component 31 and the grinding arm 10 are detachably connected.

[0127] The first chuck 311 includes three claws for abutting against the side wall of the support flange 32 to achieve a detachable connection between the chuck component 31 and the support flange 32 .

[0128] In this embodiment, during the assembly process, 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. At the same time, the provision of the first clamping sleeve and the first locking ring 312 can also reduce the vibration generated by the equipment during the grinding process and avoid 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 light and soft, and can avoid causing damage to the outer wall of the grinding arm 10.

[0130] At the same time, since the grinding arm 10 is relatively light, the grinding arm 10 can be positioned by the first clamping sleeve and the first locking ring 312 without considering the use of a material with a large friction coefficient.

[0131] For different valves, the grinding arm 10 can be fixed by replacing the supporting flange 32 that matches it, without replacing the entire grinding device 1. For different supporting flanges 32, it is only necessary to adjust the depth of the three claws of the first chuck 311 so that the three claws respectively abut against the side walls of the supporting flange 32 to achieve positioning.

[0132] In some embodiments, at least one observation window 321 is penetrated through the side wall of the support flange 32 along the thickness direction, so as 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 Fig. 9 As shown, in some embodiments, the grinding device 1 further includes an offline grinding fixing assembly 40, which is used to fix the valve removed from the system (i.e., the offline valve) during grinding. At the same time, the grinding arm support assembly 20 is used to fix the grinding arm 10, so as to realize the dual positioning of the grinding device and the grinding device during the whole grinding process, and ensure the stable grinding.

[0134] Specifically, Figure 1 As shown, the offline grinding and fixing assembly 40 includes a base 41, a second chuck 42, a valve body fixing flange (not shown in the figure) and a valve flap fixing component 44. The second chuck 42 and the grinding arm support assembly 20 are respectively detachably connected to the base 41 to ensure that the two are positioned relative to each other during the offline grinding process. The second chuck 42 can be detachably connected to the valve body fixing flange and the valve flap fixing component 44 to fix them during the offline grinding process. The valve body fixing flange 42 and the valve flap fixing component 44 are selectively used during the offline grinding process. The valve body fixing flange 42 is used to position the valve body when the sealing surface of the valve body is offline ground. The valve flap fixing component 44 is used to position the valve flap when the sealing surface of the valve flap is offline ground.

[0135] By means of 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, and can be flexibly selected according to different system working conditions and valve conditions.

[0136] It should be understood that "offline grinding" in this application refers to grinding the device after it is removed from the system, while "online grinding" in this application refers to grinding the device while it is installed in the system without removing it from the system.

[0137] In this embodiment, the valve body fixing flange is generally in the shape of a circular plate, and is formed with a plurality of bolt holes corresponding to the bolt holes on the valve body along the thickness direction, and the two are connected by bolts. When the valve body is ground offline, the valve body fixing flange is assembled to the bottom end of the valve body and clamped in the three claws of the second chuck 42 to fix the valve body.

[0138] For different types of valve bodies, only the valve body fixing flange needs to be replaced. For different valve body fixing flanges, the positions of the three clamping claws of the second clamping disc 42 can be adjusted to achieve clamping and fixing of the valve body fixing flange.

[0139] like Fig. 9As shown, in some embodiments, the valve flap fixing component 44 includes a valve flap mounting seat 431, a second clamping sleeve 432, and a second locking ring 433. The valve flap mounting seat 431 is used to support the second clamping sleeve 432 and the second locking ring 433, and to accommodate the valve flap.

[0140] In this embodiment, the valve disc mounting seat 431 is provided in a cylindrical shape that is through from top to bottom. When the valve disc fixing component 44 is provided on the second chuck 42, the bottom end of the valve disc mounting seat 431 abuts against the three claws of the second chuck 42. The second clamping sleeve 432 is annular and is provided at the top end of the valve disc mounting seat 431. The second locking ring 433 is sleeved outside the second clamping sleeve 432 and is in an arc shape with two ends spaced apart. Bolts are provided at both ends. In the process of clamping and fixing the valve disc, by turning the bolts, the gap between the two ends is reduced, and the valve disc can be locked and fixed.

[0141] It should be understood that the portion corresponding to the first clamping sleeve and the first locking ring 312, as well as the portion corresponding to the second clamping sleeve 432 and the second locking ring 433, are both provided with a plurality of through grooves along the circumferential direction, so that when the locking ring is tightened and contracted, the groove width of the through groove is correspondingly reduced, so that the clamping sleeve is contracted.

[0142] For different types of valve discs, it is sufficient to replace the valve disc fixing component 44 of different sizes, without replacing the entire grinding device 1. For different sizes of valve disc fixing components 44, it is only necessary to adjust the opening and closing degree of the three claws 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 should be understood that the sealing surface of the valve includes: the valve body step surface, the valve core surface, and the valve disc surface. Among them, the valve body step surface and the valve core surface are both sealing surfaces on the valve body, and the valve disc surface is the sealing surface on the valve disc. For the sealing surface on the valve body, both online grinding and offline grinding can be used. For the sealing surface on the valve disc, only offline grinding can be used.

[0145] The valve body step surface and the valve core surface are coaxially arranged on the valve body, and the depth of the valve core surface is deeper than that of the valve body step surface. Therefore, when the valve body is ground online, the valve body step surface and the valve core surface with different depths can be ground online by adjusting the depth adjustment ring 12 and / or replacing the support flanges 32 with different heights. When the valve body is ground offline, the valve body step surface and the valve core surface with different depths can be ground offline by adjusting the depth adjustment ring 12 and / or adjusting the height position of the mounting frame 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 in the grinding device 1 to adjust the grinding speed and grinding pressure.

[0147] It can be understood that the above embodiments only express some implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims

1. A grinding device, characterized in that: The invention comprises a grinding arm (10), wherein the grinding arm (10) comprises: A first driving assembly (13), comprising a first rotating shaft (131) and a first driving member (135), wherein the first rotating shaft (131) is connected to the first driving member (135); a second driving assembly (14), comprising a second rotating shaft (141), an eccentricity adjusting shaft (142) and a second driving member (147), wherein the eccentricity adjusting shaft (142) is sleeved outside the first rotating shaft (131); the second rotating shaft (141) is sleeved outside the eccentricity adjusting shaft (142) and connected to the second driving member (147); and A grinding disc (15) detachably connected to the bottom end of the first rotating shaft (131); Wherein, the second rotating shaft (141) and the eccentricity adjustment shaft (142) are both eccentric shafts, and the eccentricity adjustment shaft (142) is rotatably arranged in the second rotating shaft (141).

2. The grinding device according to claim 1, characterized in that: The second driving assembly (14) further comprises an eccentricity adjustment ring (143), the bottom end of the eccentricity adjustment shaft (142) extends outside 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 device according to claim 2, characterized in that: The second drive assembly (14) further comprises an adjusting shaft protective sleeve (144), wherein the adjusting shaft protective sleeve (144) is circumferentially arranged between the second rotating shaft (141) and the eccentricity adjusting shaft (142), and is detachably connected to the second rotating shaft (141) and the eccentricity adjusting shaft (142), respectively; the adjusting shaft protective sleeve (144) is spaced apart from at least a portion of the eccentricity adjusting shaft (142).

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

5. The grinding device according to any one of claims 1 to 4, characterized in that: The first rotating shaft (131) is recessed from the bottom end toward the top end to form a receiving groove (1311). The first driving assembly (13) also includes a spring loading component (132) arranged 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 arranged in the receiving groove (1311), and the bottom end is connected to the grinding disc (15). The loading spring (1321) is sleeved on the loading shaft (1322), and the two ends of the loading spring (1321) are respectively in contact with the end faces of the receiving groove (1311) and the loading shaft (1322).

6. The grinding device according to claim 5, characterized in that: The loading shaft (1322) comprises a first shaft section (1322a), a second shaft section (1322b) and a third shaft section (1322c) which are connected in sequence from top to bottom, the first shaft section (1322a) is connected to the first rotating shaft (131), and the shaft diameter of the third shaft section (1322c) is respectively larger than the shaft diameters of the first shaft section (1322a) and the second shaft section (1322b); the loading spring (1321) is sleeved on the first shaft section (1322a) and the second shaft section (1322b), and the two ends thereof are respectively abutted against the top ends of the accommodating groove (1311) and the third shaft section (1322c).

7. The grinding device according to claim 5, characterized in that: The bottom end of the loading shaft (1322) is provided with a plurality of loading force marks at intervals along the axial direction, and different loading force marks correspond to different elastic forces of the loading spring, and the loading force marks can expose the accommodating groove.

8. The grinding device according to any one of claims 1 to 4, characterized in that: The second drive assembly (14) further comprises a transition flange (146), wherein the transition flange (146) is respectively connected to the second drive member (147) and the second rotating shaft (141); the output shaft of the first drive member (135) and / or the first drive assembly (13) is inserted into the transition flange (146).

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

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

11. The grinding device according to claim 10, characterized in that: The chuck component (31) comprises a first chuck (311), a first locking ring (312) and a first clamping sleeve sleeved on the grinding arm (10); the first clamping sleeve is arranged inside the first chuck (311); the first locking ring (312) is sleeved outside the first clamping sleeve; and the first chuck (311) is detachably connected to the supporting flange (32).

12. The grinding device according to claim 10, characterized in that: The grinding arm (10) further comprises a housing (11) and a depth adjustment ring (12); the second drive assembly (14) and at least a portion of the first drive assembly (13) are arranged in the housing (11); the depth adjustment ring (12) is movably mounted on the housing (11) and is used to position the setting height of the grinding arm (10).

13. The grinding device according to claim 9, characterized in that: The grinding device also includes an offline grinding fixing assembly (40), which includes a base (41), a valve flap fixing component (44), a valve body fixing flange, and a second chuck (42) for fixing the valve flap fixing component (44) or the valve body fixing flange, wherein the second chuck (42) and the grinding arm support assembly (20) are respectively detachably arranged on the base (41).

14. The grinding device according to claim 13, characterized in that: The valve flap fixing component (44) comprises a valve flap mounting seat (431), a second locking ring (433) and a second clamping sleeve (432); the valve flap mounting seat (431) is cylindrically arranged; the second clamping sleeve (432) is arranged on the valve flap mounting seat (431); and the second locking ring (433) is sleeved outside the second clamping sleeve (432).

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