Valve body grinding apparatus

Abstract

The present application relates to the field of valve body processing and manufacturing, and particularly relates to a valve body grinding device. The valve body grinding device comprises a base body for extending into the interior of a valve body, the base body is provided with a rotating structure for rotating the base body, the base body is further provided with a mounting structure for detachably mounting a sandpaper, and the base body is further provided with a conical surface for the sandpaper to tightly adhere to, the conical surface is used for pressing the sandpaper against the edge to be ground in the valve body to grind the edge to be ground when the base body rotates. The base body is further provided with a conical surface for the sandpaper to tightly adhere to, and the conical surface is formed on the surface of the sandpaper after the sandpaper tightly adheres to the conical surface formed on the base body. When the sandpaper loses its effect after a period of grinding, the device can be maintained by only replacing the sandpaper, and the grinding precision can be adjusted by replacing the sandpaper with different mesh numbers, thereby solving the problem of high cost caused by the need to regularly replace the whole copper rod for grinding in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of valve body manufacturing, in particular to a valve body grinding device. BACKGROUND

[0002] Hydraulic transmission is widely used compared with mechanical transmission and electrical transmission because of its small size, fast response and wide range of stepless speed regulation in the process of operation and control. Figure 1 As shown in the figure, the hydraulic transmission mechanism often includes a valve body 1 and a valve stem (not shown in the figure), the valve body 1 is provided with a cavity for the flow of hydraulic oil and an annular protrusion 11 protruding from the cavity wall, the end face or inner diameter hole of the annular protrusion 11 is used to cooperate with the corresponding structure on the valve stem to realize the conduction and construction of different oil paths.

[0003] The surface of the annular protrusion 11 in contact with the valve stem needs to be smooth to avoid leakage and pressure loss during use. However, during the manufacturing process, burrs and burrs will inevitably appear on the edge 111 between the end face of the annular protrusion and the inner hole wall, if not removed, it will affect the sealing effect during use or fall with the hydraulic oil, shortening the service life of the hydraulic mechanism. In the prior art, a copper rod with an inclined surface is often used to remove the burrs, the inclined surface of the copper rod is placed on the edge 111 to grind and remove the burrs and burrs.

[0004] However, during the grinding process using the copper rod, the structure to be ground extends into the valve body for a long size, so the size of the copper rod needs to be large, which further leads to the large weight of the copper rod, which is not conducive to manual grinding operation; at the same time, it is not easy to maintain the concentricity of the copper rod and the cavity of the valve body 1 during grinding, which leads to grinding deviation; in addition, during the grinding process, the surface smoothness of the copper rod decreases after a period of use, which affects the use, so the copper rod needs to be replaced after a period of use, which is high in cost. SUMMARY

[0005] The purpose of the present application is to provide a valve body grinding device to solve the problem of high cost caused by the need to replace the whole copper rod for grinding in the prior art.

[0006] To achieve the above purpose, the valve body grinding device in the present application adopts the following technical scheme:

[0007] A valve body grinding device, comprising a base body for extending into the inside of the valve body, the base body is provided with a rotating structure for rotating the base body, the base body is further provided with a mounting structure for detachably mounting sandpaper, the base body is further provided with a tapered surface for the sandpaper to tightly adhere to, the tapered surface is used to press the sandpaper on the edge to be ground in the valve body to grind the edge to be ground when the base body rotates.

[0008] The beneficial effects of the above technical solutions are that the valve body grinding device is provided by the application, the base body is arranged to facilitate the operation inside the valve body, the rotating structure is arranged on the base body to rotate the base body, the mounting structure is arranged on the base body to detachably mount the sandpaper, the sandpaper is mounted on the base body, and then the sandpaper is rotated by the rotating structure to facilitate the grinding of the edge to be ground, the taper surface is arranged on the base body to tightly press the sandpaper on the edge to be ground in the valve body to grind the edge to be ground when the base body rotates, the taper surface is arranged on the base body to form a taper surface on the surface of the sandpaper after the sandpaper is tightly pressed on the taper surface, and the taper surface is formed to facilitate the grinding of the taper grinding surface. That is, the sandpaper is mounted on the base body to facilitate the grinding, the sandpaper is replaced to maintain the device when the sandpaper loses the function after a period of grinding, and the grinding precision is adjusted by replacing the sandpaper with different mesh numbers, thereby solving the problem of high cost caused by the need to replace the whole copper rod regularly in the prior art.

[0009] Further, the base body includes a grinding head, the taper surface is arranged on the grinding head, the mounting structure includes a first clamping surface arranged on the grinding head and a clamping sleeve arranged outside the grinding head, the clamping sleeve is provided with a second clamping surface matched with the first clamping surface to clamp the sandpaper, and the taper surface is located on one side of the first clamping surface to tightly press the part of the sandpaper beyond the first clamping surface and the second clamping surface on the taper surface.

[0010] The beneficial effects of the above technical solutions are that the two clamping surfaces are provided to fix the sandpaper, the clamping surfaces have a large contact area with the sandpaper, and the fixing effect is good; and the taper surface is located on one side of the first clamping surface, so that the sandpaper can have the part tightly pressed on the taper surface after being fixed.

[0011] Further, the first clamping surface and the second clamping surface are both tapered, and the mounting structure further includes a pushing piece arranged on the base body to push the clamping sleeve to make the second clamping surface close to the first clamping surface.

[0012] The beneficial effects of the above technical solutions are that the two clamping surfaces are both tapered to facilitate the transition to the taper surface after clamping, and the clamping of the sandpaper is facilitated by the arrangement of the pushing piece.

[0013] Further, the minimum outer diameter of the taper surface is greater than the maximum outer diameter of the first clamping surface, and a step structure is arranged between the taper surface and the first clamping surface.

[0014] The beneficial effects of the above technical solutions are that the interference between the clamping sleeve and the edge to be ground during grinding is avoided.

[0015] Further, the base body is provided with a threaded connection section, and the pushing piece is a nut installed on the threaded connection section.

[0016] The beneficial effects of the above technical solution are that the installation and disassembly are facilitated, and the position of the nut can be adjusted to adjust the different pre-tightening forces.

[0017] Further, the base body further comprises a rod body passing through the center of the grinding head, the rotating structure is arranged on the rod body, and a stop structure for stopping cooperation with the grinding head in the axial direction of the rod body is further arranged on the rod body, so that the grinding head is pressed and fixed on the rod body by the nut.

[0018] The beneficial effects of the above technical solution are that the rod body and the grinding head are arranged in a split type, the manufacturing process is simplified, and different grinding heads can be replaced according to different sizes of the inner hole of the valve body, so that the universality is higher.

[0019] Further, the rod body is provided with a stage, the stage comprises adjacent large-diameter sections and small-diameter sections, the stop structure is a step surface between the large-diameter sections and the small-diameter sections, the small-diameter section comprises the threaded connection section, and the grinding head has a step hole matched with the large-diameter sections and the small-diameter sections.

[0020] The beneficial effects of the above technical solution are that the installation of the grinding head is facilitated by the arrangement of the stage, and the fixing of the rod body and the grinding head, the fixing of the sandpaper, and the fixing of the clamping sleeve can be completed by only the nut.

[0021] Further, the base body further comprises a rod body, and the rod body is rotationally connected with the grinding head.

[0022] The beneficial effects of the above technical solution are that the rod body and the grinding head are arranged in a split type, so that the manufacturing difficulty is simplified.

[0023] Further, the rod body is provided with a centering sleeve which can rotate relative to the rod body, and the centering sleeve is provided with a positioning surface matched with the cavity port of the valve body.

[0024] The beneficial effects of the above technical solution are that the positioning surface on the centering sleeve is arranged to avoid grinding deviation in the grinding process, the rod body and the centering sleeve can rotate relative to each other, so that the centering sleeve and the end surface of the valve body can be kept stationary in the grinding process, only the rod body is rotated, and the end surface of the valve body is avoided from being worn.

[0025] Further, the positioning surface is conical.

[0026] The beneficial effects of the above technical solution are that the conical positioning surface is convenient for matching with valve body ports of different sizes. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structural schematic view of the valve body in the prior art;

[0028] Figure 2 Fig. 1 is a schematic view of the valve body grinding device of the present application;

[0029] Figure 3 Fig. 2 is a perspective view of the valve body grinding device of the present application;

[0030] Figure 4 Fig. 3 is a sectional view of the valve body grinding device of the present application;

[0031] Figure 5 Fig. 4 is a sectional view of the rod body of the embodiment shown in Fig. 1; Figure 3

[0032] Fig. 5 is a sectional view of the A part of the embodiment shown in Fig. 1; Figure 6 Figure 5 Fig. 6 is a sectional view of the B part of the embodiment shown in Fig. 1;

[0033] Figure 7 Figure 3 Fig. 7 is a sectional view of the grinding head of the embodiment shown in Fig. 1;

[0034] Figure 8 Fig. 8 is a schematic view of the cooperation between the grinding head and the clamping sleeve of the embodiment shown in Fig. 1;

[0035] Figure 9 Fig. 9 is a sectional view of the centering sleeve of the embodiment shown in Fig. 1. Figure 3

[0036] Fig. 1: 1, valve body; 11, annular protrusion; 111, edge; 2, rod body; 21, rotating structure; 22, large diameter section; 23, small diameter section; 231, polished rod section; 232, threaded connection section; 3, grinding head; 31, first clamping surface; 32, tapered surface; 33, stepped structure; 4, clamping sleeve; 41, second clamping surface; 5, centering sleeve; 51, positioning surface; 52, cylindrical through hole; 6, nut. DETAILED DESCRIPTION

[0037] The features and performances of the present application are described in further detail below in connection with the embodiments.

[0038] In the embodiment 1 of the valve body grinding device (hereinafter referred to as grinding device) of the present application:

[0039] In the present embodiment, the grinding head and the clamping sleeve are provided, the first clamping surface and the tapered surface are provided on the grinding head, the second clamping surface is provided on the clamping sleeve, the sandpaper is clamped by the first clamping surface and the second clamping surface, the part of the sandpaper beyond the two clamping surfaces is tightly attached to the tapered surface on the grinding head, and then the sandpaper is used to grind the edge on the valve body.

[0040] As Figure 2 , Figure 3 and Figure 4 ​​​As shown, the grinding device comprises a base body for extending into the inside of the valve body 1, the base body comprises a rod body 2 in the shape of a rod and a mounting structure arranged on the rod body 2 for detachably mounting the sandpaper. A tapered surface 32 is further arranged on the base body for the sandpaper to abut against, so that the sandpaper is tapered on the tapered surface 32, and when the base body extends into the inside of the valve body 1, the tapered sandpaper is facilitated to abut against the edge 111 to be ground, and the grinding is facilitated. Specifically, the base body comprises a grinding head 3, a clamping sleeve 4 and a pushing piece mounted on the rod body 2, and the grinding head 3, the clamping sleeve 4 and the pushing piece jointly constitute the mounting structure on the base body.

[0041] As shown in Figure 5 and Figure 6 , a stage is arranged on the rod body 2, the stage comprises adjacent large-diameter segments 22 and small-diameter segments 23, the diameter of the large-diameter segments 22 is larger than that of the small-diameter segments 23. It is worth noting that the small-diameter segments 23 are not equal in diameter, but the diameter of any part of the small-diameter segments 23 is smaller than that of the large-diameter segments 22. The small-diameter segments 23 are arranged close to the end of the rod body 2, and a light rod segment 231 and a threaded connection segment 232 are arranged on the small-diameter segments 23, and the threaded connection segment 232 is used to connect the pushing piece. A stop structure is further arranged on the rod body 2 for stop cooperation with the grinding head 3 to limit the axial position of the grinding head 3 on the rod body 2. Specifically, the stop structure in the embodiment is the step surface between the large-diameter segments 22 and the small-diameter segments 23. A rotating structure 21 is further arranged on the rod body 2 to rotate the sandpaper when grinding. Specifically, the rotating structure 21 is a rectangular force applying segment on the rod body away from the small-diameter segments 23.

[0042] As shown in Figure 7 , the grinding head 3 has a tapered surface 32 and a tapered first clamping surface 31, and a step structure 33 is further arranged between the first clamping surface 31 and the tapered surface 32 for the sandpaper to transition. The diameter of the part of the first clamping surface 31 adjacent to the step structure 33 is larger than the diameter of the part of the first clamping surface 31 away from the step structure 33. The tapered surface 32 also contacts the step structure 33, and the diameter of the part of the tapered surface 32 away from the step structure 33 is larger than the diameter of the part of the tapered surface 32 close to the step structure 33. That is, the minimum outer diameter of the tapered surface 32 is larger than the maximum outer diameter of the first clamping surface 31. In addition, a step hole is further arranged in the grinding head 3 which matches the stage on the rod body 2, and the grinding head 3 can be pressed on the step surface on the rod body 2 under the action of the pushing piece.

[0043] As shown in Figure 8 , the clamping sleeve 4 is sleeved on the grinding head 3, and a second clamping surface 41 is arranged on the surface of the clamping sleeve 4 close to the first clamping surface 31, and the taper of the second clamping surface 41 is the same as that of the first clamping surface 31, so as to facilitate clamping the sandpaper clamped between the first clamping surface 31 and the second clamping surface 41. Figure 3 and Figure 4As shown, the pushing piece is a nut 6, which is connected with the threaded section 232 on the rod body 2 to push the clamping sleeve 4, so that the first clamping surface 31 and the second clamping surface 41 are close to each other, and the clamping sleeve 4 and the grinding head 3 clamp the sandpaper, and the grinding head 3 is indirectly pushed, so that the stepped hole in the grinding head 3 and the stepped surface on the rod body 2 are tightly attached to each other, and then fixed and rotated by the friction between the stepped surface and the stepped hole in the grinding head 3.

[0044] As shown in Figure 2 , Figure 3 , Figure 4 and Figure 9 , the rod body 2 is further provided with a centering sleeve 5, the centering sleeve 5 is internally provided with a cylindrical through hole 52, and the centering sleeve 5 is sleeved on the large diameter section 22 of the rod body 2. Since the rod body 2 is cylindrical and the centering sleeve 5 is internally provided with a cylindrical through hole 52, the centering sleeve 5 can slide along the axial direction of the rod body 2 and rotate on the rod body 2. The centering sleeve 5 is provided with a positioning surface 51 matched with the cavity port of the valve body 1, and the positioning surface 51 is conical to adapt to ports of different diameters.

[0045] When the edge 111 inside the valve body 1 needs to be ground, the sandpaper in the form of a rectangular sheet is first installed between the grinding head 3 and the clamping sleeve 4, and the other end is exposed. The nut 6 is tightened, and then the rod body 2 is inserted into the valve body 1, so that the sandpaper and the edge 111 to be ground are in contact. Since the centering sleeve 5 and the rod body 2 can rotate relative to each other, when grinding, the positioning surface 51 of the centering sleeve 5 can be abutted on the port of the valve body 1, and then the centering sleeve 5 is pressed, so that the positioning surface 51 of the centering sleeve 5 is tightly attached to the cavity port of the valve body, and no longer rotates. At this time, the rotating structure 21 drives the rod body 2 to rotate, the rod body 2 rotates relative to the centering sleeve, the sandpaper rotates with it, and then the edge 111 is ground.

[0046] The valve body grinding device in the present application is not limited to the above-mentioned embodiments, and various modified embodiments can be obtained based on the design concept of the present application.

[0047] In the second embodiment of the valve body grinding device in the present application: for the setting form of the positioning surface, the present embodiment proposes a new arrangement form. Different from the first embodiment, the positioning surface in the present embodiment is a cylindrical surface, which is in contact with the inner diameter surface of the valve body and the cavity of the valve body to position the rod body.

[0048] In the third embodiment of the valve body grinding device in the present application: for the setting form of the centering sleeve, the present embodiment proposes a new arrangement form. Different from the first embodiment, the centering sleeve and the rod body are integrally formed in the present embodiment. Of course, in other embodiments, the centering sleeve can not be provided, and the grinding can be directly performed.

[0049] In the embodiment 4 of the valve body grinding device in the application: for the setting form of the base body, the embodiment proposes a new arrangement form. Different from the embodiment 1, the rod body and the grinding head are integrally formed in the embodiment.

[0050] In the embodiment 5 of the valve body grinding device in the application: for the setting of the rod body, the embodiment proposes a new arrangement form. Different from the embodiment 1, the rod body is arrayed with bosses along the outer peripheral surface thereof in the embodiment, and the grinding head is positionally limited by the bosses.

[0051] In the embodiment 6 of the valve body grinding device in the application: for the setting of the rod body, the embodiment proposes a new arrangement form. Different from the embodiment 1, the rod body is no longer provided with a stepped portion, but is provided with a threaded segment, and the grinding head is arranged on the threaded segment. When the grinding head is placed on the threaded segment, the two ends of the grinding head are exposed with threads. Positioning nuts are arranged on the threaded segment at the two sides of the grinding head, and the grinding head is positionally limited by the two nuts.

[0052] In the embodiment 7 of the valve body grinding device in the application: for the setting of the conical surface and the first clamping surface, the embodiment proposes a new arrangement form. Different from the embodiment 1, the minimum outer diameter of the conical surface is equal to the maximum outer diameter of the first clamping surface in the embodiment, and the stepped structure is no longer arranged, that is, the conical surface and the first clamping surface are on the same surface.

[0053] In the embodiment 8 of the valve body grinding device in the application: for the setting of the pushing piece, the embodiment proposes a new arrangement form. Different from the embodiment 1, the rod body is a light rod in the embodiment, and two half-cylindrical clamping rings are arranged on the light rod. Clamping hoops are arranged on the outer peripheral surfaces of the clamping rings. First, the grinding head is clamped by the clamping rings, and then the clamping hoops are clamped, so that the clamping rings no longer slide on the rod body, and the second clamping surface is close to the first clamping surface.

[0054] In the embodiment 9 of the valve body grinding device in the application: for the setting of the mounting structure, the embodiment proposes a new arrangement form. Different from the embodiment 1, two clamping hoops are arranged on the rod body and the grinding head in the embodiment, and the two ends of the sandpaper are clamped in the two clamping hoops, and the conical surface is located between the two clamping hoops, so that the sandpaper clamped by the clamping hoops is tightly attached to the conical surface. At this time, the pushing piece, the first clamping surface and the clamping sleeve are no longer arranged.

[0055] In the embodiment 10 of the valve body grinding device in the present application: for the setting of the first clamping surface and the second clamping surface, the embodiment proposes a new arrangement. Different from the embodiment 1, the first clamping surface and the second clamping surface are cylindrical surfaces in the embodiment, a cylindrical surface is arranged on the grinding head as the first clamping surface, and two semicircular rings in the shape of semicylinders are arranged outside the cylindrical surface of the grinding head, and a clamp is arranged outside the semicircular rings to clamp the two semicircular rings on the grinding head.

[0056] In the embodiment 11 of the valve body grinding device in the present application: for the setting of the rotating structure, the embodiment proposes a new arrangement. Different from the embodiment 1, the rotating structure is a square hole in the embodiment, the handle is connected through the square hole to manipulate the rod body, and of course the rotating structure can also be arranged as the outer circumferential surface of the exposed end of the rod body in other embodiments, and the rod body is rotated by holding the outer circumferential surface of the valve body.

[0057] The above is only the preferred embodiment of the present application, and is not used to limit the present application, the patent protection scope of the present application is subject to the claims, and any equivalent structural changes made by using the content of the specification and drawings of the present application should also be included in the protection scope of the present application.

Claims

1. A valve body grinding device, characterized in that: The device includes a base for extending into the valve body, a rotating structure for rotating the base, and a mounting structure for detachably mounting sandpaper. The base includes a grinding head with a conical surface. The mounting structure includes a first conical clamping surface on the grinding head and a clamping sleeve fitted outside the grinding head. The clamping sleeve has a second clamping surface that cooperates with the first clamping surface to clamp the sandpaper. A stepped structure is provided between the conical surface and the first clamping surface. The stepped structure is located close to the outer circumference of the grinding head. The end face of the clamping sleeve is opposite to the stepped structure. The conical surface allows the portion of the sandpaper extending beyond the first and second clamping surfaces to be tightly pressed against and pressed onto the edge to be ground inside the valve body so that the edge to be ground can be ground when the base rotates.

2. The valve body grinding device according to claim 1, characterized in that: The mounting structure also includes a pusher mounted on the base for pushing the clamping sleeve so that the second clamping surface is close to the first clamping surface.

3. The valve body grinding device according to claim 2, characterized in that: The base is provided with a threaded connection section, and the pushing member is a nut installed on the threaded connection section.

4. The valve body grinding device according to claim 3, characterized in that: The base also includes a rod passing through the center of the grinding head. The rotating structure is disposed on the rod, and the rod is also provided with a stop structure for stopping the grinding head in the axial direction of the rod, so as to press and fix the grinding head on the rod by the nut.

5. The valve body grinding device according to claim 4, characterized in that: The rod body is provided with a stepped section, which includes an adjacent large-diameter section and a small-diameter section. The stopping structure is a stepped surface between the large-diameter section and the small-diameter section. The small-diameter section includes the threaded connection section. The grinding head has stepped holes that respectively mate with the large-diameter section and the small-diameter section.

6. The valve body grinding apparatus according to any one of claims 1-5, characterized in that: The base also includes a rod, which is connected to the grinding head to prevent rotation.

7. The valve body grinding device according to claim 6, characterized in that: A centering sleeve is rotatably fitted onto the rod body, and the centering sleeve is provided with a positioning surface for engaging with the cavity port of the valve body.

8. The valve body grinding device according to claim 7, characterized in that: The positioning surface is conical.

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