Valve grinding device

Abstract

The utility model provides a valve grinding device which comprises a support, a driving shaft, a first connecting plate, a transmission shaft and a grinding piece. The driving shaft is connected with the upper driving device; one side of the first connecting plate is movably connected with the driving shaft; one end of the transmission shaft is connected with the other side of the first connecting plate; the driving shaft, the first connecting plate and the transmission shaft rotate synchronously, and the first connecting plate drives the transmission shaft to swing through the movable joint with the transmission shaft; the grinding piece is connected with the other end of the transmission shaft; the transmission shaft swings to drive the grinding piece to deflect, the grinding piece is placed on the sealing face of the valve body, the transmission shaft can be driven to swing by moving the first connecting plate, and due to the fact that the grinding piece is connected with the lower end of the transmission shaft, swinging of the transmission shaft can drive the grinding piece to deflect on the sealing face of the valve body. Even if the grinding piece and the sealing surface are ground and swing simultaneously, the whole arc surface of the grinding piece is ground uniformly, so that the grinding precision of the sealing surface is ensured, and the service life of the grinding piece is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to a valve grinding device. Background Art

[0002] For globe valves and lift check valves with metal seals, the valve seats often need to be ground. For example, Chinese Patent CN104029113B discloses a grinding tool for a valve seat of an oil valve, which includes a grinding rod, and a grinding head is connected to the lower end of the grinding rod. During use, the valve seat sealing surface is ground by the grinding head.

[0003] However, for the above-mentioned grinding tool, the grinding is direct forming contact grinding. The biggest disadvantage is that a groove will be ground on the grinding head after a long time, and finally the grinding accuracy (roundness and roughness) of the valve seat sealing surface of the valve body is insufficient. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is that when direct forming contact grinding is used in the prior art, a groove will be ground on the grinding head after a long time, and finally the grinding accuracy (roundness and roughness) of the valve seat sealing surface of the valve body is insufficient.

[0005] To this end, the utility model provides a valve grinding device, including:

[0006] A bracket, on which an upper driving device is provided;

[0007] A driving shaft, connected to the upper driving device;

[0008] A first connecting plate, one side of which is movably connected to the driving shaft;

[0009] A transmission shaft, one end of which is connected to the other side of the first connecting plate;

[0010] The driving shaft, the first connecting plate and the transmission shaft rotate synchronously, and the first connecting plate drives the transmission shaft to swing through the movable connection with the transmission shaft;

[0011] A grinding member, connected to the other end of the transmission shaft;

[0012] The transmission shaft swings to drive the grinding member to deflect.

[0013] Optionally, the valve grinding device further includes:

[0014] A dial ring, sleeved on the periphery of the first connecting plate;

[0015] A bearing member, arranged between the dial ring and the first connecting plate;

[0016] A dial rod, connected to the dial ring;

[0017] The shift lever is subjected to an external force to push the shift ring and the first connecting plate to move, so as to drive the transmission shaft to swing.

[0018] Optionally:

[0019] Step structures are provided on the inner peripheral side wall of the shift ring and the outer peripheral side of the first connecting plate, and the two step structures form a placement cavity for placing the bearing member;

[0020] It further includes a rotating connecting plate, which is connected to the first connecting plate and the shift ring, and the rotating connecting plate partially covers the upper side of the placement cavity.

[0021] Optionally, the valve grinding device further includes a retaining ring, which is connected to the shift ring and partially covers the upper side of the placement cavity;

[0022] The retaining ring and the rotating connecting plate simultaneously cover the upper side of the placement cavity to fix the bearing member.

[0023] Optionally, the valve grinding device further includes:

[0024] A transmission pin shaft, one end of which is inserted into the notch at the end of the drive shaft, and the other end of the transmission pin shaft is movably connected to the first connecting plate;

[0025] An elastic member is arranged in the notch;

[0026] The elastic member is elastically deformed under the extrusion of the transmission pin shaft.

[0027] Optionally:

[0028] A waist-shaped hole is provided on the side wall of the notch;

[0029] A support rod is provided on the side wall of the transmission pin shaft, and the support rod penetrates through the waist-shaped hole.

[0030] Optionally, the valve grinding device further includes:

[0031] A second connecting plate, which is connected to the end of the transmission shaft;

[0032] A locking shaft, one end of which is connected to the second connecting plate, and the other end of the locking shaft penetrates through the grinding member;

[0033] A locking member, which is connected to the end of the locking shaft and abuts against the grinding member.

[0034] Optionally, the drive shaft and the first connecting plate, as well as the transmission shaft and the first connecting plate, are connected by a cross universal joint.

[0035] Optionally, the bracket includes:

[0036] Bracket columns;

[0037] A support crossbeam, connected to the support column, and the upper driving device is arranged on the support crossbeam;

[0038] A chuck, connected to the support column, and the chuck is adapted to fix a valve body;

[0039] A lower driving device, connected to the chuck to drive the chuck to rotate.

[0040] The valve grinding device provided by the present utility model has the following advantages:

[0041] The present utility model provides a valve grinding device, including a support, a driving shaft, a first connecting plate, a transmission shaft, and a grinding member. An upper driving device is arranged on the support; the driving shaft is connected to the upper driving device; one side of the first connecting plate is movably connected to the driving shaft, and one end of the transmission shaft is connected to the other side of the first connecting plate; the driving shaft, the first connecting plate, and the transmission shaft rotate synchronously, and the first connecting plate drives the transmission shaft to swing through the movable connection with the transmission shaft; the grinding member is connected to the other end of the transmission shaft; the transmission shaft swings to drive the grinding member to deflect.

[0042] For the valve grinding device with this structure, the grinding member is placed on the sealing surface of the valve body. By arranging the first connecting plate between the driving shaft and the transmission shaft, and the first connecting plate is movably connected to both the driving shaft and the transmission shaft. Therefore, on the premise of ensuring that the first connecting plate can transmit the rotation of the driving shaft to the transmission shaft, the transmission shaft can be driven to swing by moving the first connecting plate. Since the grinding member is connected to the lower end of the transmission shaft, the swing of the transmission shaft can drive the grinding member to deflect on the sealing surface of the valve body, that is, the grinding member can swing while grinding the sealing surface, so that the entire arc surface of the grinding member is evenly ground, thereby ensuring the grinding accuracy of the sealing surface and extending the service life of the grinding member. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0044] Figure 1 It is a schematic structural view of the valve grinding device provided in the embodiment of the present utility model;

[0045] Figure 2 For Figure 1 An enlarged view of the structure at circle A in

[0046] Figure 3 is Figure 2 an enlarged view of the structure at position B in the middle circle;

[0047] Figure 4 is Figure 1 an enlarged view of the structure at position C in the middle circle;

[0048] Figure 5 a schematic diagram showing the distribution of the transmission shaft in the valve grinding device provided in the embodiment of the present utility model.

[0049] Explanation of reference numerals:

[0050] 11 - support column; 12 - support crossbeam; 13 - chuck; 14 - upper drive device; 15 - lower drive device;

[0051] 2 - drive shaft;

[0052] 3 - first connecting plate;

[0053] 4 - transmission shaft;

[0054] 5 - grinding part;

[0055] 61 - dial ring; 62 - bearing part; 63 - dial rod; 64 - rotating connecting plate; 65 - pressure ring;

[0056] 71 - transmission pin shaft; 72 - elastic part;

[0057] 81 - second connecting plate; 82 - locking shaft; 83 - locking part;

[0058] 9 - cross universal joint. Detailed implementation manners

[0059] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0060] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0061] Embodiment

[0062] This embodiment provides a valve grinding device, as Figures 1 to 5 shown, including a bracket, a drive shaft 2, a first connecting plate 3, a transmission shaft 4, a dial ring 61, a second connecting plate 81, and a grinding member 5.

[0063] In this embodiment, the bracket includes a bracket column 11, a bracket cross beam 12, an upper driving device 14, a chuck 13, and a lower driving device 15. The bracket cross beam 12 is connected to the bracket column 11. The upper driving device 14 is arranged on the bracket cross beam 12. The chuck 13 is connected to the bracket column 11. A valve body is adapted to be fixed on the chuck 13. The lower driving device 15 is connected to the chuck 13 to drive the chuck 13 to rotate.

[0064] In this embodiment, the drive shaft 2 is connected to the upper driving device. The upper side of the first connecting plate 3 is movably connected to the drive shaft 2. The upper end of the transmission shaft 4 is connected to the lower side of the first connecting plate 3. The drive shaft 2, the first connecting plate 3, and the transmission shaft 4 rotate synchronously. And the first connecting plate 3 drives the transmission shaft 4 to swing through the movable connection with the transmission shaft 4. The grinding member 5 is connected to the lower end of the transmission shaft 4. The transmission shaft 4 swings to drive the grinding member 5 to deflect.

[0065] As Figure 1 shown, the grinding member 5 is placed on the sealing surface of the valve body. By arranging the first connecting plate 3 between the drive shaft 2 and the transmission shaft 4, and the first connecting plate 3 is movably connected to both the drive shaft 2 and the transmission shaft 4. Therefore, on the premise of ensuring that the first connecting plate 3 can transmit the rotation of the drive shaft 2 to the transmission shaft 4, moving the first connecting plate 3 can drive the transmission shaft 4 to swing. Since the grinding member 5 is connected to the lower end of the transmission shaft 4, the swing of the transmission shaft 4 can drive the grinding member 5 to deflect on the sealing surface of the valve body, that is, the grinding member 5 realizes swinging while grinding with the sealing surface. In this way, the entire arc surface of the grinding member 5 is evenly ground, thereby ensuring the grinding accuracy of the sealing surface and also extending the service life of the grinding member 5.

[0066] As Figure 2 andFigure 3 As shown, the shifting ring 61 is sleeved on the circumference of the first connecting plate 3, and a bearing 62 is arranged between the shifting ring 61 and the first connecting plate 3, so that the shifting ring 61 can be kept stationary when the first connecting plate 3 rotates. A shifting rod 63 is connected to the circumference of the shifting ring 61, and the shifting rod 63 is subjected to external force to push the shifting ring 61 and the first connecting plate 3 to move, so as to drive the transmission shaft 4 to swing.

[0067] Specifically, in this embodiment, if Figure 3 As shown, the inner ring side wall of the shifting ring 61 and the outer peripheral side of the first connecting plate 3 are both provided with step structures, and the two step structures constitute a placement cavity for placing the bearing member 62. After the bearing member 62 is placed inside the placement cavity, the rotating connecting plate 64 is fixedly connected to the first connecting plate 3 and the upper side of the shifting ring 61 by bolts, and the edge of the rotating connecting plate 64 near the first connecting plate 3 protrudes to the upper side of the placement cavity, and at the same time, the pressing ring 65 is connected to the shifting ring 61 by bolts, and the edge of the pressing ring 65 protrudes to the upper side of the placement cavity, and then the rotating connecting plate 64 and the protruding edge of the pressing ring 65 can fix the bearing member 62 in the placement cavity.

[0068] Specifically, in this embodiment, the driving shaft 2 and the first connecting plate 3 as well as the transmission shaft 4 and the first connecting plate 3 are connected via a cross universal joint 9 .

[0069] like Figure 2 As shown, one end of the transmission pin 71 is inserted into the notch at the end of the driving shaft 2, and the other end of the transmission pin 71 is movably connected to the first connecting plate 3; the elastic member 72 is arranged in the notch; the elastic member 72 is squeezed by the transmission pin 71 to be elastically deformed.

[0070] By arranging the elastic member 72 in the slot, the elastic member 72 provides pressure to the transmission pin 71, thereby making the grinding member 5 abut against the sealing surface of the valve body. The side wall of the slot is provided with a waist hole, and the side wall of the transmission pin 71 is provided with a support rod, which passes through the waist hole, thereby limiting the transmission pin 71 and preventing the transmission pin 71 from leaving the slot.

[0071] like Figure 4 As shown, the second connecting plate 81 is connected to the bottom end of the transmission shaft 4 through a cross universal joint 9, the upper end of the locking shaft 82 is connected to the second connecting plate 81, and the lower end of the locking shaft 82 passes through the grinding member 5; the locking member 83 is connected to the end of the locking shaft 82 and abuts against the grinding member 5. The grinding member 5 can be fixed by the locking member 83 when in use, or the grinding member 5 can be replaced by loosening the locking member 83.

[0072] Specifically, the lower end surface of the locking shaft 82 is provided with an external thread, and the locking member 83 is a nut adapted to the external thread.

[0073] like Figure 5As shown, the number of drive shafts 4 is four, one is in the middle, and the other three are arranged around the one in the middle.

[0074] For the valve grinding device provided in this embodiment, the valve body is fixed on the chuck 13. Grinding paste is applied to the sealing surface of the valve body and the grinding member 5. After installing the grinding tool, the lower driving device 15 drives the valve body to rotate slowly, and the upper driving device drives the driving shaft 2 to rotate in the direction opposite to that of the valve body. The grinding member 5 is abutted against the sealing surface by the pre-tightening force of the elastic member 72. Hold the lever 63 by hand and at the same time gently reciprocate the lever 63 up and down. At this time, the swing will be finally transmitted to the grinding member 5 through the cross universal joint, so that the grinding member 5 can swing while grinding with the sealing surface. In this way, the entire arc surface of the grinding member 5 is evenly ground, thereby ensuring the grinding accuracy of the sealing surface and prolonging the service life of the grinding member 5. At the same time, valves of different specifications and calibers can replace the grinding members 5 of different sizes to achieve the universality of the tooling.

[0075] Obviously, the above embodiments are only examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the creation of the present utility model.

Claims

1. A valve grinding device, characterized in that, Comprising: A bracket, on which an upper driving device (14) is provided; A driving shaft (2), connected to the upper driving device (14); A first connecting plate (3), one side of which is movably connected to the driving shaft (2); A transmission shaft (4), one end of which is connected to the other side of the first connecting plate (3); The driving shaft (2), the first connecting plate (3) and the transmission shaft (4) rotate synchronously, and the first connecting plate (3) drives the transmission shaft (4) to swing at the movable connection with the transmission shaft (4); A grinding member (5), connected to the other end of the transmission shaft (4); The transmission shaft (4) swings to drive the grinding member (5) to deflect.

2. The valve grinding device according to claim 1, wherein, Further comprising: A collar (61), sleeved on the periphery of the first connecting plate (3); A bearing member (62), arranged between the collar (61) and the first connecting plate (3); A lever (63), connected to the collar (61); The lever (63) is subjected to an external force to push the collar (61) and the first connecting plate (3) to move, so as to drive the transmission shaft (4) to swing.

3. The valve grinding device according to claim 2, wherein: Step structures are provided on the inner peripheral side wall of the collar (61) and the outer peripheral side of the first connecting plate (3), and the two step structures form a placement cavity for placing the bearing member (62); Further comprising a rotating connecting plate (64), the rotating connecting plate (64) is connected to the first connecting plate (3) and the collar (61), and a part of the rotating connecting plate (64) covers the upper side of the placement cavity.

4. The valve lapping device according to claim 3, wherein, Further comprising a retaining ring (65), the retaining ring (65) is connected to the collar (61) and partially covers the upper side of the placement cavity; The retaining ring (65) and the rotating connecting plate (64) simultaneously cover the upper side of the placement cavity to fix the bearing member (62).

5. The valve lapping device according to any one of claims 1-4, characterized in that, Further comprising: A transmission pin shaft (71), one end of which is inserted into a notch at the end of the driving shaft (2), and the other end of the transmission pin shaft (71) is movably connected to the first connecting plate (3); An elastic member (72), arranged in the notch; The elastic member (72) is elastically deformed under the extrusion of the transmission pin shaft (71).

6. The valve grinding device according to claim 5, wherein: A waist-shaped hole is provided on the side wall of the notch; A support rod is provided on the side wall of the transmission pin shaft (71), and the support rod penetrates through the waist-shaped hole.

7. The valve lapping device according to any one of claims 1-4, characterized in that, Further comprising: A second connecting plate (81), connected to the end of the transmission shaft (4); A locking shaft (82), one end of which is connected to the second connecting plate (81), and the other end of the locking shaft (82) penetrates through the grinding member (5); A locking member (83), connected to the end of the locking shaft (82) and abutted against the grinding member (5).

8. The valve lapping device according to any one of claims 1 to 4, characterized in that, The driving shaft (2) and the first connecting plate (3) and the transmission shaft (4) and the first connecting plate (3) are connected by a cross universal joint (9).

9. The valve grinding device according to any one of claims 1-4, characterized in that, The bracket comprises: A bracket column (11); A bracket cross beam (12), connected to the bracket column (11), and the upper driving device (14) is arranged on the bracket cross beam (12); The chuck (13) is connected to the support column (11), and the valve body is adapted to be fixed on the chuck (13); The lower driving device (15) is connected to the chuck (13) to drive the chuck (13) to rotate.

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