Grinding device

Abstract

The present application relates to a grinding device, which includes a support mechanism, a loading mechanism, and a grinding mechanism. The support mechanism is used to connect with the valve body to be ground; the loading mechanism includes a sliding component and a centering component connected to the sliding component; the sliding component is slidably connected to the support mechanism, and a first convex spherical surface is formed on one side of the centering component facing away from the sliding component; the grinding mechanism includes a grinding shaft and a grinding disc; one end of the grinding shaft is formed with a first accommodating cavity with a concave spherical cavity wall, the first accommodating cavity is used to accommodate the first convex spherical surface, and the cavity wall of the first accommodating cavity abuts against the first convex spherical surface, and the other end of the grinding shaft is connected to the grinding disc; the grinding disc is used to abut against the sealing surface of the valve body to be ground. When the grinding device is used to grind the sealing surface of a nuclear-grade valve in a nuclear power plant, the grinding force applied by the loading mechanism to the grinding shaft can have a high degree of coincidence with the axis of the grinding shaft, so that the grinding force finally applied to the sealing surface is relatively balanced, and the grinding effect on the sealing surface is also better.

Description

Technical Field

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

[0002] A key process for the maintenance of nuclear-grade valves and related similar equipment in nuclear power plants is the grinding of the sealing surface. Generally, the sealing surfaces of nuclear-grade valves mainly include the sealing surface of the valve flap, the sealing surface of the valve seat, the sealing surface of the flange, and the sealing surface of the assembly step. However, due to factors such as the working space of nuclear-grade valves, radioactive media, and operation convenience, the grinding of the sealing surfaces of many nuclear-grade valves must be carried out manually. In related technologies, the sealing surface is mostly manually ground by a relatively simple grinding tool. However, in this grinding method, it is difficult to align the grinding force applied by the grinding tool with the sealing surface to be ground, and thus, during the grinding process, the grinding force applied to the sealing surface is uneven, resulting in a poor grinding effect on the sealing surface. Summary of the Invention

[0003] Based on this, it is necessary to provide a grinding device for solving the problem that the grinding force applied by the grinding tool to the sealing surface to be ground is uneven, resulting in a poor grinding effect on the sealing surface.

[0004] A grinding device includes:

[0005] A support mechanism for connecting with the valve body to be ground;

[0006] A loading mechanism including a sliding component and a centering member connected to the sliding component; the sliding component is slidably connected to the support mechanism, and a first convex spherical surface is formed on one side of the centering member facing away from the sliding component; and

[0007] A grinding mechanism including a grinding shaft and a grinding disc; a first receiving cavity with a concave spherical surface as the cavity wall is formed at one end of the grinding shaft, the first receiving cavity is used to accommodate the first convex spherical surface, and the cavity wall of the first receiving cavity abuts against the first convex spherical surface. The other end of the grinding shaft is connected to the grinding disc; the grinding disc is used to abut against the sealing surface of the valve body to be ground.

[0008] In one embodiment, when the first convex spherical surface is accommodated in the first receiving cavity, the first convex spherical surface can automatically rotate and swing around its own axis.

[0009] In one embodiment, the radius r1 of the concave spherical surface surrounded by the cavity wall of the first receiving cavity is greater than the radius r2 of the first convex spherical surface.

[0010] In one embodiment, the radius r1 of the concave spherical surface formed by the cavity wall of the first accommodating cavity and the radius r2 of the first convex spherical surface satisfy the condition:

[0011] 1.2r2 ≤ r1 ≤ 3r2.

[0012] In one embodiment, the gap h between the top surface of the first accommodating cavity close to the loading mechanism side and the bottom surface of the first convex spherical surface far from the grinding mechanism side satisfies the condition:

[0013] 1 mm < h ≤ r1.

[0014] In one embodiment, the support mechanism includes a support assembly and a transverse support rod; one end of the support assembly is used to connect with the valve body to be ground, and the other end of the support assembly is connected with the transverse support rod;

[0015] The sliding assembly includes a sliding seat and a sliding block; the sliding seat is connected with the transverse support rod, a sliding groove is formed on the sliding seat, the sliding block is connected with the centering member, and the sliding block can be at least partially accommodated in the sliding groove and slide in the sliding groove.

[0016] In one embodiment, a clamping arm protrudes from the side of the groove wall of the sliding groove facing the groove cavity;

[0017] The sliding block includes an upper sliding block and a lower sliding block; when the upper sliding block and the lower sliding block cooperate, a first clamping groove can be formed, and the clamping arm is at least partially accommodated and slides in the first clamping groove.

[0018] In one embodiment, the grinding device further includes a flipping mechanism, the flipping mechanism is installed between the support assembly and the transverse support rod, and the flipping mechanism can drive the transverse support rod to rotate around a rotation axis.

[0019] In one embodiment, the flipping mechanism includes a flipping frame, a flipping shaft and a flipping rod; the flipping frame is connected with the support assembly, the flipping shaft passes through the flipping frame, one end of the flipping rod is sleeved and fixedly connected to the flipping shaft, and the other end of the flipping rod is connected with the transverse support rod; when the flipping shaft rotates around its own rotation axis, it can drive the flipping rod to rotate around the rotation axis of the flipping shaft, so that the transverse support rod rotates.

[0020] In one embodiment, the support assembly includes a first vertical support rod and a second vertical support rod;

[0021] One end of the first vertical support rod is used to connect with the valve body to be ground, and the other end of the first vertical support rod is connected with the second vertical support rod; on the side of the second vertical support rod facing away from the first vertical support rod, it is connected with the turning frame, and the second vertical support rod can move closer to or away from the valve body to be ground, so as to drive the turning frame to move closer to or away from the valve body to be ground.

[0022] In one embodiment, the support assembly further includes a third vertical support rod and a support pad; the third vertical support rod includes a first stepped rod and a second stepped rod connected to each other; the first stepped rod is connected to the valve body to be ground, the second stepped rod is connected to the first vertical support rod, the support pad is sleeved on the outer periphery of the second stepped rod, and the support pad abuts between the end face of the first vertical support rod and the upper surface of the valve body to be ground.

[0023] In one embodiment, the loading mechanism further includes a pressure regulating handwheel, one end of the pressure regulating handwheel passes through the sliding block and is connected with the centering member, and the pressure regulating handwheel is threadedly connected with the sliding block; the outer surface of the pressure regulating handwheel is provided with pressure regulating scales arranged along its circumferential direction.

[0024] In one embodiment, the grinding mechanism further includes a universal joint, the universal joint is installed between the grinding shaft and the grinding disc, the universal joint is fixedly connected to one end of the grinding shaft close to the grinding disc, on the side of the universal joint facing away from the grinding shaft, a second convex spherical surface is constructed, on the side of the grinding disc close to the grinding shaft, a second receiving cavity with a concave spherical cavity wall is constructed, the second receiving cavity is used to accommodate the second convex spherical surface, and the cavity wall of the second receiving cavity abuts against the second convex spherical surface.

[0025] In one embodiment, the cavity wall of the second receiving cavity is constructed with a second clamping groove;

[0026] The grinding mechanism further includes a clamping member, the clamping member is sleeved on the universal joint and accommodated in the second clamping groove.

[0027] When performing a grinding operation on the sealing surface of a nuclear-grade valve in a nuclear power plant through the above-mentioned grinding device, first connect the support mechanism to the valve body to be ground, then make the grinding disc abut against the sealing surface of the valve body to be ground, and then dispose the first convex spherical surface of the centering member in the first accommodating cavity and make the cavity wall of the first accommodating cavity abut against the first convex spherical surface. Since the sliding assembly is slidably connected to the support mechanism, when the first convex spherical surface abuts against the cavity wall of the first accommodating cavity in the shape of a concave spherical surface, the centering member can slide relative to the support mechanism under the drive of the sliding assembly, and thus the first convex spherical surface and the concave spherical surface can be automatically centered, so that the straight line parallel to the vertical plane where the center of the first convex spherical surface is located coincides with a high degree with the straight line parallel to the vertical plane where the center of the concave spherical surface is located. As a result, the grinding force applied by the loading mechanism to the grinding shaft has a high degree of coincidence with the axis of the grinding shaft, and further the grinding force finally applied to the sealing surface is relatively balanced, and the final grinding effect on the sealing surface is also good. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 FIG. 1 is a schematic diagram of a grinding device provided by an embodiment of the present application.

[0029] Figure 2 is Figure 1 a partially enlarged view of the portion A shown in FIG. 1.

[0030] Figure 3 is Figure 1 a partial cross-sectional view of the grinding device shown in FIG. 1.

[0031] Figure 4 is Figure 3 a partially enlarged view of the portion B shown in FIG. 1.

[0032] Figure 5 is Figure 1 the front view of the grinding device shown in FIG. 1.

[0033] Figure 6 is Figure 1 the top view of the grinding device shown in FIG. 1.

[0034] Figure 7 is Figure 6 the cross-sectional view taken along the line C-C of the grinding device shown in FIG. 1.

[0035] Figure 8 is Figure 7 a partially enlarged view of the portion D shown in FIG. 1.

[0036] Figure 9 FIG. 2 is a schematic diagram of the grinding disc in the grinding device provided by the second embodiment of the present application.

[0037] Reference numerals: 100 - support mechanism; 110 - support assembly; 111 - first vertical support rod; 112 - second vertical support rod; 113 - third vertical support rod; 1131 - first stepped rod; 1132 - second stepped rod; 114 - support pad; 120 - horizontal support rod; 200 - loading mechanism; 210 - sliding assembly; 211 - sliding seat; 2111 - sliding groove; 2112 - clamping arm; 212 - sliding block; 2121 - upper sliding block; 21211 - first cross bar; 21212 - second cross bar; 2122 - lower sliding block; 21221 - second cross bar; 21222 - second vertical bar; 2123 - first clamping groove; 220 - centering member; 221 - first convex spherical surface; 230 - pressure regulating handwheel; 300 - grinding mechanism; 310 - grinding shaft; 311 - first accommodating cavity; 320 - grinding disc; 321 - second accommodating cavity; 3211 - second clamping groove; 330 - universal joint; 331 - second convex spherical surface; 340 - clamping member; 350 - grinding handle; 360 - guiding member; 400 - flipping mechanism; 410 - flipping frame; 411 - third clamping groove; 420 - flipping shaft; 430 - flipping rod; 440 - locking member; 450 - locking piece; 500 - valve body to be ground; 510 - valve hole; 520 - sealing surface; 530 - connecting hole. Detailed implementation manners

[0038] In order to make the above objects, features and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0039] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0040] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0041] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath", and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0044] Please refer to Figure 1 and Figures 5 - 7 , Figure 1 which shows a schematic diagram of a grinding device provided by an embodiment of this application. Figure 5 shows Figure 1 the front view of the grinding device shown in Figure 6 shows Figure 1 the top view of the grinding device shown in Figure 7shows Figure 6 a cross-sectional view taken along line C-C as shown. Refer to Figure 7 , a grinding device provided by an embodiment of the present application, which includes a support mechanism 100, a loading mechanism 200, and a grinding mechanism 300. The support mechanism 100 is used to connect with the valve body 500 to be ground; the loading mechanism 200 includes a sliding assembly 210 and a centering member 220 connected to the sliding assembly 210; the sliding assembly 210 is slidably connected to the support mechanism 100, and a first convex spherical surface 221 is formed on one side of the centering member 220 facing away from the sliding assembly 210; the grinding mechanism 300 includes a grinding shaft 310 and a grinding disc 320; one end of the grinding shaft 310 is formed with a first receiving cavity 311 with a concave spherical cavity wall, and the first receiving cavity 311 is used to accommodate the first convex spherical surface 221, and the cavity wall of the first receiving cavity 311 abuts against the first convex spherical surface 221, and the other end of the grinding shaft 310 is connected to the grinding disc 320; the grinding disc 320 is used to abut against the sealing surface 520 of the valve body 500 to be ground.

[0045] When the sealing surface 520 of the nuclear-grade valve in the nuclear power plant is ground by this grinding device, first connect the support mechanism 100 with the valve body 500 to be ground, then abut the grinding disc 320 against the sealing surface 520 of the valve body 500 to be ground, and then accommodate the first convex spherical surface 221 of the centering member 220 in the first receiving cavity 311 and make the cavity wall of the first receiving cavity 311 abut against the first convex spherical surface 221. Since the sliding assembly 210 is slidably connected to the support mechanism 100, when the first convex spherical surface 221 abuts against the cavity wall of the first receiving cavity 311 with a concave spherical shape, the centering member 220 can slide relative to the support mechanism 100 driven by the sliding assembly 210, and thus the first convex spherical surface 221 can be automatically centered with the concave spherical surface, so that the straight line m1 parallel to the vertical plane where the center of the first convex spherical surface 221 is located coincides with a high degree with the straight line m2 parallel to the vertical plane where the center of the concave spherical surface of the first receiving cavity 311 is located. As a result, the grinding force applied by the loading mechanism 200 to the grinding shaft 310 coincides with a high degree with the axis of the grinding shaft 310, and further the grinding force finally applied to the sealing surface 520 is relatively balanced, and the final grinding effect on the sealing surface 520 is also good.

[0046] It should be noted that the number of the support mechanisms 100 is two, and the two support mechanisms 100 are arranged at intervals along the length direction of the sliding assembly 210. Specifically, the length direction of the sliding assembly 210 is Figure 5the xx' direction therein; and the two support mechanisms 100 are respectively connected to the sliding assembly 210, so that a set of symmetrical support forces can be applied to the sliding assembly 210 through the two support mechanisms 100, and the sliding assembly 210 has better stability. Furthermore, when the entire grinding mechanism 300 grinds the sealing surface 520 of the valve body 500 to be ground, it is more stable and the grinding effect is better.

[0047] In one specific embodiment, the centering member 220 and the sliding assembly 210 are fixedly connected by means of threaded connection or adhesive connection to prevent loosening between the two.

[0048] In one specific embodiment, the centering member 220 is a universal ball. When the loading mechanism 200 applies a grinding force, the universal ball can transmit the grinding force applied by the loading mechanism 200 to the grinding shaft 310 in the form of point contact, and the grinding shaft 310 finally transmits the grinding force to the grinding disc 320. Furthermore, when the grinding shaft 310 rotates around its own rotation axis, the sealing surface 520 of the valve body 500 to be ground can be ground. Specifically, the rotation axis of the grinding shaft 310 is Figure 5 the yy' direction therein.

[0049] It should be noted that the centering member 220 can be directly connected to the sliding assembly 210, or the indirect connection method in this embodiment can be used to connect the two. For example, the centering member 220 and the sliding assembly 210 are respectively connected through a pressure regulating handwheel 230, so as to realize the indirect connection between the centering member 220 and the sliding assembly 210. The connection method between the centering member 220 and the sliding assembly 210 is not particularly limited, as long as it can ensure that when the sliding assembly 210 slides relative to the support mechanism 100, the centering member 220 can move synchronously with the sliding assembly 210.

[0050] The following specifically describes the structure of the grinding device. Please refer to Figures 2 - 4 and Figures 8 - 9 , Figure 2 shows Figure 1 the enlarged partial view of the A position shown in Figure 3 shows Figure 1 the partial cross-sectional view of the grinding device shown in Figure 8 shows Figure 7 the enlarged partial view of the D position shown in Figure 9 shows the schematic diagram of the grinding disc 320 in the grinding device provided in the second embodiment of the present application.

[0051] In one embodiment, when the first convex spherical surface 221 is received in the first receiving cavity 311, the first convex spherical surface 221 can automatically rotate and swing about its own axis. By automatically rotating and swinging about its own axis when the first convex spherical surface 221 is received in the first receiving cavity 311, the first convex spherical surface 221 can be automatically centered with the concave spherical surface, so that the straight line m1 parallel to the vertical plane where the center of the first convex spherical surface 221 is located coincides with a high degree with the straight line m2 parallel to the vertical plane where the center of the concave spherical surface of the first receiving cavity 311 is located. As a result, the grinding force applied by the loading mechanism 200 to the grinding shaft 310 can coincide with a high degree with the axis of the grinding shaft 310, and further, the grinding force finally applied to the sealing surface 520 is relatively balanced, and the final grinding effect on the sealing surface 520 is also better.

[0052] In one embodiment, the radius r1 of the concave spherical surface surrounded by the cavity wall of the first receiving cavity 311 is greater than the radius r2 of the first convex spherical surface 221. By setting r1 to be greater than r2, when the first convex spherical surface 221 is received in the concave spherical surface surrounded by the cavity wall of the first receiving cavity 311, the first convex spherical surface 221 can better achieve automatic centering.

[0053] In one embodiment, the radius r1 of the concave spherical surface surrounded by the cavity wall of the first receiving cavity 311 and the radius r2 of the first convex spherical surface 221 satisfy the condition: 1.2r2 ≤ r1 ≤ 3r2. By limiting the size of r1 to be greater than or equal to 1.2 times r2 and less than or equal to 3 times r2, the matching between the two is more reasonable. It can avoid the phenomenon that the first convex spherical surface 221 is prone to jamming in the first receiving cavity 311 when the size of r1 is small; it can also effectively ensure the spherical curvature of the cavity wall of the first receiving cavity 311, so that when the first convex spherical surface 221 automatically rotates and swings in the first receiving cavity 311, it is easier to slide to achieve the function of rapid automatic centering.

[0054] Please refer to Figure 7, in one embodiment, the gap h between the top surface of the first accommodating cavity 311 close to the loading mechanism 200 and the bottom surface of the first convex spherical surface 221 far from the grinding mechanism 300 satisfies the condition: 1 mm < h ≤ r1. By setting the size of h to be greater than 1 mm, when the first convex spherical surface 221 automatically rotates and swings in the first accommodating cavity 311, it can prevent the phenomenon that the bottom surface of the first convex spherical surface 221 far from the grinding mechanism 300 abuts against and interferes with the top surface of the first accommodating cavity 311 close to the loading mechanism 200 due to the too small size of h. At the same time, since h is less than or equal to r1, it can also ensure that when the first convex spherical surface automatically rotates and swings to the extreme position with the largest angle in the first accommodating cavity 311, the first convex spherical surface 221 can also abut against the cavity wall of the first accommodating cavity 311.

[0055] Please refer to Figure 7 , the support mechanism 100 of the grinding device provided by an embodiment of the present application includes a support assembly 110 and a transverse support rod 120; one end of the support assembly 110 is used to connect with the valve body 500 to be ground, and the other end of the support assembly 110 is connected with the transverse support rod 120; the sliding assembly 210 includes a sliding seat 211 and a sliding block 212; the sliding seat 211 is connected with the transverse support rod 120, a sliding groove 2111 is formed on the sliding seat 211, the sliding block 212 is connected with the centering member 220, and the sliding block 212 can be at least partially accommodated in the sliding groove 2111 and slide in the sliding groove 2111.

[0056] When the first convex spherical surface 221 abuts against the cavity wall of the first accommodating cavity 311 in the shape of a concave spherical surface, the centering member 220 can slide in the sliding groove 2111 driven by the sliding block 212, compensating for the position deviation of the grinding shaft 310 relative to the valve body 500 to be ground, and then realizing the automatic centering of the positions of the first convex spherical surface 221 and the concave spherical surface, so that the straight line m1 parallel to the vertical plane where the center of the first convex spherical surface 221 is located coincides with a high degree with the straight line m2 parallel to the vertical plane where the center of the concave spherical surface is located, so that the grinding force applied by the loading mechanism 200 to the grinding shaft 310 coincides with a high degree with the axis of the grinding shaft 310, and further making the grinding force finally applied to the sealing surface 520 relatively balanced and the final grinding effect on the sealing surface 520 better.

[0057] It should be noted that the centering member 220 can be directly connected to the sliding block 212, or the indirect connection method in this embodiment can be adopted to realize the connection between the two. For example, the centering member 220 and the sliding assembly 210 are indirectly connected by a pressure regulating handwheel 230 respectively connected to the two, and no special limitation is made on this.

[0058] It should be noted that the sliding seat 211 and the transverse support rod 120 can be slidably connected or fixedly connected, and there is no special limitation on this.

[0059] See also Figure 3 、 Figure 4 and Figure 7 In one embodiment of the present application, a sliding groove 2111 of a grinding device is provided with a protruding engaging arm 2112 on the side of the groove wall facing the groove cavity. The sliding block 212 includes an upper slider 2121 and a lower slider 2122. When the upper slider 2121 and the lower slider 2122 cooperate, they form a first engaging groove 2123, and the engaging arm 2112 is at least partially accommodated and slides within the first engaging groove 2123. By sliding the engaging arm 2112 within the first engaging groove 2123, the positions of the first convex spherical surface 221 and the concave spherical surface are automatically aligned. At the same time, during this process, the engaging arm 2112 limits the first engaging groove 2123, thereby preventing the sliding block 212 from separating from the groove wall of the sliding groove 2111, making the entire sliding process smoother.

[0060] For details, please refer to Figure 4 The upper slider 2121 includes a first crossbar 21211 and a first vertical bar 21212 set at an angle, and the lower slider 2122 includes a second crossbar 21221 and a second vertical bar 21222 set at an angle. The second vertical bar 21222 of the lower slider 2122 abuts against the surface of the first crossbar 21211 of the upper slider 2121, thereby forming a first clamping groove 2123 between the first crossbar 21211 and the second crossbar 21221. This design makes it more convenient to assemble the sliding block 212 with the clamping arm 2112. Specifically, after the upper slider 2121 and the lower slider 2122 are positioned, they can be connected by threading or bonding, so that the two can be fixedly connected into a whole and can slide freely within a certain two-dimensional horizontal plane relative to the sliding block 212.

[0061] In one specific embodiment, the first engaging groove 2123 is along Figure 5 The dimension in the yy' direction is larger than the dimension in the yy' direction of the clamping arm 2112. Figure 5 The dimension in the yy' direction is 1mm, which effectively ensures the reliable operation of the entire grinding device.

[0062] See also Figure 7 The grinding device provided in one embodiment of the present application further includes a flip mechanism 400, which is installed between the support assembly 110 and the transverse support rod 120. The flip mechanism 400 can drive the transverse support rod 120 to rotate around a rotation axis. By setting the flip mechanism 400 to drive the transverse support rod 120 to rotate around a rotation axis, the centering member 220 can be driven to rotate around the rotation axis, thereby making the grinding device 110 rotate along the transverse support rod 120.Figure 5 The horizontal support rods 120 on the left and right sides in the xx' direction in it can be in the same vertical plane, so that the first convex spherical surface 221 and the concave spherical surface can be better centered. The angle between the straight line m1 parallel to the vertical plane where the center of the first convex spherical surface 221 is located and the straight line m2 parallel to the vertical plane where the center of the concave spherical surface is located is smaller, and the coincidence degree is higher.

[0063] Please refer to Figure 3 and Figure 7 As shown in FIGS. and, the flipping mechanism 400 of the grinding device provided by an embodiment of the present application includes a flipping frame 410, a flipping shaft 420 and a flipping rod 430; the flipping frame 410 is connected to the support assembly 110, the flipping shaft 420 passes through the flipping frame 410, one end of the flipping rod 430 is sleeved and fixedly connected to the flipping shaft 420, and the other end of the flipping rod 430 is connected to the horizontal support rod 120; when the flipping shaft 420 rotates around its own rotation axis, it can drive the flipping rod 430 to rotate around the rotation axis of the flipping shaft 420, so that the horizontal support rod 120 rotates. Specifically, the direction of the rotation axis of the flipping shaft 420 is the xx' direction in Figure 5 in.

[0064] It should be noted that when the present device grinds the sealing surface 520 of the valve body 500 to be ground, sandpaper is bonded to the side of its grinding disc 320 close to the sealing surface 520, and the sealing surface 520 is ground through the sandpaper. Therefore, when the sandpaper is worn after grinding for a certain time or different roughnesses are replaced, the sandpaper needs to be replaced.

[0065] When the sandpaper needs to be replaced, at this time, the centering member 220 is separated from the grinding shaft 310 and is more than 5 mm above the upper surface of the grinding shaft 310, and then the flipping rod 430 rotates around the rotation axis of the flipping shaft 420, so that the horizontal support rod 120 connected to the flipping rod 430 rotates, and then the grinding disc 320 is taken out, and the sandpaper bonded on the grinding disc 320 is replaced. The time required for the entire replacement process is short, and the operation efficiency is high.

[0066] In one specific embodiment, the fitting clearance between the flipping rod 430 and the flipping frame 410 is 0.20 ± 0.05 mm, the fitting clearance between the flipping shaft 420 and the flipping frame 410 and the flipping rod 430 is 0.20 - 0.50 mm, and the shaft hole fitting clearance between the horizontal support rod 120 and the flipping rod 430 is preferably 0.3 ± 0.10 mm, effectively ensuring the reliable operation of the entire grinding device.

[0067] Please refer to Figure 5 and Figure 7The flip mechanism 400 of the grinding device provided in one embodiment of the present application further includes a locking member 440, which is spaced apart from the flip shaft 420 along the yy' direction in FIG5, and the locking member 440 can be arranged along the rotation axis direction of the flip shaft 420, that is, Figure 5 The xx' direction in FIG is detachably connected to the flip frame 410. When the locking member 440 is inserted into the flip frame 410, the flip rod 430 cannot rotate relative to the rotation axis of the flip shaft 420. When the locking member 440 is separated from the flip frame 410, the flip rod 430 can rotate relative to the rotation axis of the flip shaft 420.

[0068] In one specific embodiment, the transverse support rod 120 is slidably connected to the flip rod 430 , and an axial scale is provided on the outer surface of the transverse support rod 120 , thereby enabling rapid positioning of the installation position of the loading mechanism 200 relative to the support mechanism 100 .

[0069] See also Figure 5 and Figure 7 The support assembly 110 of the grinding device provided in one embodiment of the present application includes a first vertical support rod 111 and a second vertical support rod 112; one end of the first vertical support rod 111 is used to connect with the valve body to be ground 500, and the other end of the first vertical support rod 111 is connected to the second vertical support rod 112; the second vertical support rod 112 is connected to the flip frame 410 on the side away from the first vertical support rod 111, and the second vertical support rod 112 can move closer to or away from the valve body to be ground, so as to drive the flip frame 410 to move closer to or away from the valve body to be ground 500. Since the second vertical support rod 112 can move closer to or away from the valve body to be ground 500, it can drive the flip frame 410 connected to the second vertical support rod 112 to move closer to or away from the valve body to be ground, thereby making the horizontal support rod 120 connected to the flip frame 410 also move closer to or away from the valve body to be ground 500, so that it can be achieved along Figure 5 The heights of the lateral support rods 120 on the left and right sides in the xx' direction are adjustable and can be adjusted to the same horizontal plane, so that the first convex spherical surface 221 and the concave spherical surface can be better aligned.

[0070] In one specific embodiment, the second vertical support rod 112 includes a clamping portion and a threaded portion that are connected to each other. A third clamping groove 411 is configured on the flip frame 410. The clamping portion can be received in the third clamping groove 411, and the threaded portion is threadedly connected to the first vertical support rod 111. Therefore, when the second vertical support rod 112 is rotated, the second vertical support rod 112 can be moved closer to or farther from the grinding valve body 500.

[0071] See also Figure 5 and Figure 7, the support assembly 110 of the grinding device provided by an embodiment of the present application further includes a locking member 450. The locking member 450 is sleeved on the second vertical support rod 112 and is threadedly connected to the second vertical support rod 112. When the second vertical support rod 112 is screwed and the distance between the second vertical support rod 112 and the valve body 500 to be ground is adjusted, at this time, the locking member 450 is screwed so that the locking member 450 moves closer to the flipping frame 410, and then the locking member 450 abuts against the lower surface of the flipping frame 410, so that the clamping portion presses against the groove wall of the third clamping groove 411, thereby restricting the rotation of the second vertical support rod 112, so that the distance between the second vertical support rod 112 and the valve body 500 to be ground does not change, and the position of the second vertical support rod 112 and the upper surface of the valve body 500 to be ground is locked, thus realizing the height position locking of the flipping frame 410. Specifically, the locking member 450 can be Figure 7 as shown in the figure. One of the two locking members 450 abuts against the flipping frame 410, and the other abuts against the upper surface of the first vertical support rod 111.

[0072] It should be noted that, please refer to Figure 2 and Figure 7 , when the clamping portion of the second vertical support rod 112 is installed in the third clamping groove 411, at this time, the side openings of the two third clamping grooves 411 are all along Figure 2 the xx' direction in the figure, so that the locking member 440 can be inserted into and pulled out of the flipping frame 410 more conveniently along the xx' direction.

[0073] Please refer to Figure 7 , the support assembly 110 of the grinding device provided by an embodiment of the present application further includes a third vertical support rod 113 and a support pad 114; the third vertical support rod 113 includes a first stepped rod 1131 and a second stepped rod 1132 connected to each other; the first stepped rod 1131 is connected to the valve body 500 to be ground, the second stepped rod 1132 is connected to the first vertical support rod 111, the support pad 114 is sleeved on the outer periphery of the second stepped rod 1132, and the support pad 114 abuts between the end face of the first vertical support rod 111 and the upper surface of the valve body 500 to be ground. By providing the support pad 114, the contact area of the support assembly 110 with the upper surface of the valve body 500 to be ground can be increased, the stability of the entire support mechanism 100 is enhanced, and the upper surface of the valve body 500 to be ground is also protected.

[0074] In one specific embodiment, the first stepped rod 1131 is a threaded rod, which is used for threaded connection with the connection hole 530 opened on the valve body 500 to be ground. Therefore, the connection between this grinding device and the valve body 500 to be ground is very simple and convenient, and the whole device is simple and lightweight. Moreover, it can well meet the grinding operation requirements in special spatial positions, such as grinding the valve seat sealing surface 520 in the inverted position, grinding in the anti-gravity direction, etc.

[0075] In one specific embodiment, the second stepped rod 1132 is also a threaded rod. The second stepped rod 1132 is threadedly connected to the first vertical support rod 111. Furthermore, by screwing the first vertical support rod 111, the connection between the first vertical support rod 111 and the third vertical support rod 113 can be achieved, which is relatively simple and convenient.

[0076] Please refer to Figure 7 , the loading mechanism 200 of the grinding device provided by an embodiment of the present application further includes a pressure regulating handwheel 230. One end of the pressure regulating handwheel 230 passes through the sliding block 212 and is connected to the centering member 220, and the pressure regulating handwheel 230 is threadedly connected to the sliding block 212; a pressure regulating scale arranged along its circumferential direction is provided on the outer surface of the pressure regulating handwheel 230. By providing the pressure regulating handwheel 230 and threadedly connecting the pressure regulating handwheel 230 to the sliding block 212, the grinding force can be adjusted by rotating the pressure regulating handwheel 230 to adjust the torque of the mating thread between the pressure regulating handwheel 230 and the sliding block 212. At the same time, since a pressure regulating scale is also provided on the outer surface of the pressure regulating handwheel 230, the grinding feed amount can be read during the process of rotating the pressure regulating handwheel 230, so as to control the application of the grinding force to be more accurate and stable.

[0077] Since the pressure regulating handwheel 230 of this grinding device is threadedly connected to the sliding block 212, the grinding force can be applied to the grinding disc 320 by means of threaded loading, realizing the quantitative control of the grinding force and the continuous and stable output of the grinding force during the grinding process, and at the same time greatly reducing the working intensity of the operators. At the same time, since the pressure regulating handwheel 230 is provided with a pressure regulating scale, it can effectively avoid the situation that the grinding force varies from person to person and cannot be quantitatively controlled, and the situation that the grinding force applied by the user is unstable due to factors such as the extension of the operation time, the change of the ambient temperature, or the change of the operation space, and the requirements for the maintenance skills and work experience of the user are also relatively low.

[0078] In one specific embodiment, a hexagonal structure capable of clamping a torque wrench is further provided on the top of the pressure regulating handwheel 230. Therefore, the pressure regulating handwheel 230 can be rotated manually or by using the hexagonal structure on its top through a torque wrench.

[0079] It should be noted that when the device grinds the sealing surface 520 of the valve body 500 to be ground, sandpaper is adhered to the side of the grinding disc 320 close to the sealing surface 520, and the sealing surface 520 is ground by the sandpaper. Therefore, when the sandpaper wears after grinding for a certain time or different roughnesses are replaced, the sandpaper needs to be replaced. At this time, first rotate the pressure regulating handwheel 230 in the reverse direction so that the centering member 220 is separated from the grinding shaft 310 and is more than 5 mm above the upper surface of the grinding shaft 310, and then make the turning rod 430 rotate around the rotation axis of the turning shaft 420, so that the transverse support rod 120 connected to the turning rod 430 rotates, and then take out the grinding disc 320 and replace the sandpaper adhered to the grinding disc 320. The time required for the entire replacement process is short and the operation efficiency is high.

[0080] It should be noted that in order to ensure the reliable operation of the entire grinding device, during the assembly process, thread lubricating grease or anti-seize compound can be used at the external threads of the pressure regulating handwheel 230, the locking member 450, the third vertical support rod 113, and the grinding shaft 310.

[0081] Please refer to Figure 7 and Figure 8 As shown in, the grinding mechanism 300 of the grinding device provided by an embodiment of the present application further includes a universal joint 330. The universal joint 330 is installed between the grinding shaft 310 and the grinding disc 320. The universal joint 330 is fixedly connected to one end of the grinding shaft 310 close to the grinding disc 320. A second convex spherical surface 331 is formed on the side of the universal joint 330 facing away from the grinding shaft 310. A second receiving cavity 321 with a concave spherical cavity wall is formed on the side of the grinding disc 320 close to the grinding shaft 310. The second receiving cavity 321 is used to accommodate the second convex spherical surface 331, and the cavity wall of the second receiving cavity 321 abuts against the second convex spherical surface 331.

[0082] By setting the universal joint 330, the grinding disc 320 becomes a universal grinding component. Specifically, a second convex spherical surface 331 is formed on the side of the universal joint 330 facing away from the grinding shaft 310. When the second convex spherical surface 331 abuts against the cavity wall of the second receiving cavity 321 with a concave spherical shape, it can slide relative to the support mechanism 100 under the drive of the sliding component 210, so that the second convex spherical surface 331 is automatically centered with the concave spherical surface, and the straight line m3 parallel to the vertical plane where the center of the second convex spherical surface 331 is located coincides with the straight line m4 parallel to the vertical plane where the center of the concave spherical surface of the second receiving cavity 321 is located with a high degree of coincidence. As a result, the grinding force applied to the grinding shaft 310 by the loading mechanism 200 coincides with the axis of the grinding shaft 310 with a high degree of coincidence, and the grinding force finally applied to the sealing surface 520 is more balanced, and the final grinding effect on the sealing surface 520 is also better.

[0083] Please refer toFigure 8 In one embodiment of the present application, the wall of the second accommodation cavity 321 of the grinding device is configured with a second clamping groove 3211; the grinding mechanism 300 further includes a clamping member 340, which is sleeved on the universal joint 330 and accommodated in the second clamping groove 3211. Through the cooperation of the clamping member 340 and the second clamping groove 3211, after the universal joint 330 and the grinding disc 320 are installed, it is not easy for them to fall off. In one specific embodiment, the clamping member 340 is a circlip for hole.

[0084] Please refer to Figure 3 and <> Figure 7 In one embodiment of the present application, the grinding mechanism 300 of the grinding device further includes a guiding member 360, which is used to cooperate with the wall of the valve hole 510 of the valve body 500 to be ground, and the grinding shaft 310 passes through the guiding member 360 and is connected to the universal joint 330. By setting the guiding member 360, during the grinding process, the grinding shaft 310 is not easy to shake left and right, so that the direction of the grinding force applied to the sealing surface 520 is more balanced and the grinding effect is better. In one specific embodiment, the fitting clearance between the grinding shaft 310 and the guiding ring is 0.05 - 0.10 mm, and the fitting clearance between the guiding ring and the wall of the valve hole 510 is 0.05 - 0.10 mm, effectively ensuring the reliable operation of the entire grinding device.

[0085] Please refer to Figure 9 The schematic diagram of the grinding disc 320 provided by the second embodiment of the present application is a right-angle grinding disc, which is rigidly connected to the grinding shaft 310 by means of threaded connection and bears the same loading force and rotational motion as the grinding shaft 310.

[0086] It should be noted that, by the perpendicularity between the sealing surface 520 of the valve body 500 to be ground and the center line of the valve body, it is determined whether to select Figure 8 the universal grinding assembly shown in Figure 9 or the right-angle grinding disc shown in Figure 8 Specifically, when the perpendicularity between the sealing surface 520 of the valve body 500 to be ground and the center line of the valve body is less than or equal to 0.02, the universal grinding assembly shown in Figure 9 can be selected at this time, and the requirements for the grinding personnel are relatively low and the fault tolerance is relatively strong. When the perpendicularity between the sealing surface 520 of the valve body 500 to be ground and the center line of the valve body is greater than 0.02, the right-angle grinding disc shown in

[0087] Please refer to Figure 1 、 Figure 5 and Figure 7, the grinding mechanism 300 of the grinding device provided by an embodiment of the present application further includes a grinding handle 350. The grinding handle 350 is fixedly sleeved on the grinding shaft 310, which facilitates the user to drive the grinding shaft 310 to rotate around its own rotation axis through the grinding handle 350. Specifically, the rotation axis of the grinding shaft 310 is Figure 5 the yy' direction in

[0088] . Specifically, there are multiple grinding handles 350, and the multiple grinding handles 350 are circumferentially and evenly installed on the grinding shaft 310 to increase the force arm, reduce the operation intensity, and improve the grinding efficiency. In one specific embodiment, the number of grinding handles 350 is six. Of course, in other embodiments, it can also be five, seven, etc., and no special limitation is made thereto.

[0089] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0090] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patented application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A grinding device, characterized in that, The grinding device includes: A support mechanism (100) for connecting with the valve body (500) to be ground; it includes a support component (110) and a lateral support rod (120); one end of the support component (110) is for connecting with the valve body (500) to be ground, and the other end of the support component (110) is connected with the lateral support rod (120); A loading mechanism (200), including a sliding component (210) and a centering member (220) connected to the sliding component (210); the sliding component (210) is slidably connected with the support mechanism (100), and a first convex spherical surface (221) is constructed on one side of the centering member (220) away from the sliding component (210); and A grinding mechanism (300), including a grinding shaft (310) and a grinding disc (320); a first accommodation cavity (311) with a concave spherical cavity wall is constructed at one end of the grinding shaft (310), the first accommodation cavity (311) is for accommodating the first convex spherical surface (221), and the cavity wall of the first accommodation cavity (311) abuts against the first convex spherical surface (221), and the other end of the grinding shaft (310) is connected with the grinding disc (320); the grinding disc (320) is for abutting against the sealing surface (520) of the valve body (500) to be ground; A flipping mechanism (400), the flipping mechanism (400) is installed between the support component (110) and the lateral support rod (120); the flipping mechanism (400) includes a flipping frame (410), a flipping shaft (420) and a flipping rod (430); the flipping frame (410) is connected with the support component (110), the flipping shaft (420) passes through the flipping frame (410), one end of the flipping rod (430) is sleeved and fixedly connected to the flipping shaft (420), and the other end of the flipping rod (430) is connected with the lateral support rod (120); when the flipping shaft (420) rotates around its own rotation axis, it can drive the flipping rod (430) to rotate around the rotation axis of the flipping shaft (420), so that the lateral support rod (120) rotates.

2. The grinding device according to claim 1, characterized in that, When the first convex spherical surface (221) is accommodated in the first accommodation cavity (311), the first convex spherical surface (221) can automatically rotate and swing around its own axis.

3. The grinding device according to claim 2, characterized in that, The radius r1 of the concave spherical surface surrounded by the cavity wall of the first accommodation cavity (311) is greater than the radius r2 of the first convex spherical surface (221).

4. The grinding device according to claim 3, characterized in that, The radius r1 of the concave spherical surface surrounded by the cavity wall of the first accommodation cavity (311) and the radius r2 of the first convex spherical surface (221) satisfy the condition: 1.2r2≤r1≤3r2。 5. The grinding device according to claim 4, wherein The gap h between the top surface of the first accommodation cavity (311) on the side close to the loading mechanism (200) and the bottom surface of the first convex spherical surface (221) on the side away from the grinding mechanism (300) satisfies the condition: 1mm < h ≤ r1.

6. The grinding device according to any one of claims 1-5, characterized in that, The sliding assembly (210) includes a sliding seat (211) and a sliding block (212); the sliding seat (211) is connected to the transverse support rod (120); a sliding groove (2111) is constructed on the sliding seat (211); the sliding block (212) is connected to the centering member (220); and the sliding block (212) can be at least partially accommodated in the sliding groove (2111) and slide in the sliding groove (2111).

7. The grinding device according to claim 6, characterized in that, A clamping arm (2112) is protruded from one side of the groove wall of the sliding groove (2111) facing the groove cavity; The sliding block (212) comprises an upper slider (2121) and a lower slider (2122); when the upper slider (2121) and the lower slider (2122) cooperate, a first clamping groove (2123) can be formed, and the clamping arm (2112) is at least partially accommodated and slides in the first clamping groove (2123).

8. The grinding device according to claim 1, wherein, The support assembly (110) comprises a first vertical support rod (111) and a second vertical support rod (112); One end of the first vertical support rod (111) is used to connect to the valve body to be ground (500), and the other end of the first vertical support rod (111) is connected to the second vertical support rod (112); the side of the second vertical support rod (112) facing away from the first vertical support rod (111) is connected to the flip frame (410), and the second vertical support rod (112) can move closer to or farther away from the valve body to be ground (500) to drive the flip frame (410) to move closer to or farther away from the valve body to be ground (500).

9. The grinding device according to claim 8, characterized in that, The support assembly (110) further includes a third vertical support rod (113) and a support pad (114); the third vertical support rod (113) includes a first step rod (1131) and a second step rod (1132) connected to each other; the first step rod (1131) is connected to the valve body to be ground (500), the second step rod (1132) is connected to the first vertical support rod (111), the support pad (114) is sleeved on the outer periphery of the second step rod (1132), and the support pad (114) abuts between the end face of the first vertical support rod (111) and the upper surface of the valve body to be ground (500).

10. The grinding device according to claim 6, wherein, The loading mechanism (200) further comprises a pressure regulating hand wheel (230), one end of which passes through the sliding block (212) and is connected to the centering member (220), and the pressure regulating hand wheel (230) is threadedly connected to the sliding block (212); and the outer surface of the pressure regulating hand wheel (230) is provided with pressure regulating scales arranged along its circumference.

11. The grinding device according to claim 6, characterized in that, The grinding mechanism (300) further comprises a universal joint (330), the universal joint (330) being installed between the grinding shaft (310) and the grinding disc (320), the universal joint (330) being fixedly connected to one end of the grinding shaft (310) close to the grinding disc (320), a second convex spherical surface (331) being constructed on a side of the universal joint (330) facing away from the grinding shaft (310), a second accommodating cavity (321) having a cavity wall in the shape of a concave spherical surface being constructed on a side of the grinding disc (320) close to the grinding shaft (310), the second accommodating cavity (321) being used to accommodate the second convex spherical surface (331), and the cavity wall of the second accommodating cavity (321) being in contact with the second convex spherical surface (331).

12. The grinding device according to claim 11, characterized in that, The cavity wall of the second accommodating cavity (321) is configured with a second clamping groove (3211); The grinding mechanism (300) further comprises a clamping member (340), wherein the clamping member (340) is sleeved on the universal joint (330) and accommodated in the second clamping groove (3211).

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