CN220761800U - Simple clamping tool for valve ball - Google Patents
Simple clamping tool for valve ball Download PDFInfo
- Publication number
- CN220761800U CN220761800U CN202322581630.XU CN202322581630U CN220761800U CN 220761800 U CN220761800 U CN 220761800U CN 202322581630 U CN202322581630 U CN 202322581630U CN 220761800 U CN220761800 U CN 220761800U
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- CN
- China
- Prior art keywords
- valve ball
- expansion column
- column
- fixed cone
- hollow cavity
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- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000003754 machining Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Abstract
The utility model discloses a simple clamping tool for a valve ball, relates to the field of valve tools, and solves the problems of unstable structure and cost waste. The device comprises a fixed cone, a central screw piece and an expansion column, wherein the expansion column is formed by splicing at least two column blocks, an elastic sleeve is sleeved on the expansion column, and the elastic sleeve is elastically pressed and sleeved on each column block; the outer surface of the fixed cone is provided with a conical surface, the expansion column is axially provided with a hollow cavity, and the conical surface is matched with the hollow cavity to expand the expansion column to be propped against the valve ball; the central screw piece penetrates through the hollow cavity to be in threaded connection with the fixed cone, and one end of the central screw piece is abutted to the axial side end of the expansion column. The expansion column is pushed to shift towards the direction of the fixed cone through the rotary center screw, so that the expansion column expands outwards to push against the runner wall of the valve ball, the valve ball is fixed, the valve ball is clamped simply by manpower, the structural design is more stable, the tooling requirement is low, the cost is low, and the valve ball is suitable for processing small-caliber valve balls.
Description
Technical Field
The utility model relates to the field of valve tools, in particular to a simple clamping tool for a valve ball.
Background
The sealing performance of a ball valve depends to a large extent on the precision of the ball valve, and factors such as roundness, surface roughness, machining dimensional precision and the like of the ball valve directly affect the performance of a ball valve product. In the valve ball machining process, the valve ball needs to be fixed through a clamping tool so as to ensure the machining quality of the valve ball.
Such as Chinese utility model patent: CN212192242U, a location frock of ball valve spheroid, it discloses including hollow expansion sleeve, briquetting and central screw rod, expansion sleeve's front end is provided with the opening, central screw rod's one end and screw threaded connection, central screw rod's the other end is connected with the pneumatic cylinder to central screw rod receives the pneumatic cylinder pulling force in order to remove the briquetting and impress in the opening and make expansion sleeve expansion on spheroid installation expansion sleeve. The processing of the outer circle of the whole sphere can be completed only by installing the positioning tool fixed with the sphere on the main shaft of the machine tool. However, the inventor encounters some problems in the use process of the technical scheme, the movable pressing block is pulled by the pulling force of the hydraulic cylinder, when the pulling force of the hydraulic cylinder is too large or the hydraulic cylinder is used too frequently, the expansion sleeve can be subjected to plastic deformation, so that the expansion sleeve is damaged to be invalid, the material elasticity requirement on the expansion sleeve is high, the problem of unstable structure is caused, the hydraulic cylinder is suitable for a valve ball with small caliber, the pulling cost is high by the hydraulic cylinder, and the cost is wasted.
Disclosure of Invention
The purpose of the utility model is that: in order to overcome the defects of the prior art, the utility model provides a simple clamping tool for a valve ball, which solves the problems of unstable structure and cost waste.
The technical scheme of the utility model is as follows: the device comprises a fixed cone, a central screw piece and an expansion column, wherein the expansion column is formed by splicing at least two column blocks, an elastic sleeve is sleeved on the expansion column, and the elastic sleeve is elastically pressed and sleeved on each column block; the outer surface of the fixed cone is provided with a conical surface, the expansion column is axially provided with a hollow cavity, and the conical surface is matched with the hollow cavity to expand the expansion column to be propped against the valve ball; the central screw piece penetrates through the hollow cavity to be in threaded connection with the fixed cone, and one end of the central screw piece is abutted to the axial side end of the expansion column.
By adopting the technical scheme, the expansion column is pushed to shift towards the direction of the fixed cone by the rotating center screw, so that the expansion column expands outwards to press the runner wall of the valve ball, and the valve ball is fixed; the tool can be fixed by screwing the central screw by hand or by means of a tool, the expansion column is not required to have elastic deformation capability, parts are not easy to expand and damage, the elastic sleeve can be replaced even if damaged, the replacement cost is low, the simple clamping valve ball is realized by manpower, the structural design is more stable, the tool requirement is low, and the tool is low in cost and suitable for processing of small-caliber valve balls.
In one possible design, one side of the hollow cavity forms a tapered opening that is adapted to the tapered surface to form a beveled offset fit.
By adopting the design, the expansion process of the expansion column is more stable, the column block is not easy to deviate, and the action is reliable.
In one possible design, the fixed cone has more than two layers of cones, and a cylindrical surface is provided between each layer of cones, the taper of each layer of cones being consistent with the taper of the cone opening.
By adopting the design, the fixed cone is fixed on the machine tool, so that the fixed cone is not easy to detach, the multilayer conical surface can be matched with valve balls with different calibers, the application range is enlarged, the fixed cone is not required to be detached, and the operation is convenient.
In one possible design, the circumferential wall of the expansion column is provided with a plurality of ring grooves, the elastic sleeve is installed in the ring grooves, and the elastic sleeve does not exceed the circumferential wall surface of the expansion column when placed in the ring grooves.
By adopting the design, the elastic sleeve is prevented from contacting the runner wall of the valve ball too much, and interference is prevented.
In one possible design, the elastic sleeve is a coil or a rubber band.
By adopting the design, the spring ring has long service life and stable elastic performance, but has higher cost; the rubber band has low cost and convenient replacement, and can basically meet the requirements.
In one possible design, the central screw member comprises a screw rod and a pressing plate at one end of the screw rod, wherein the screw rod penetrates through the hollow cavity and is in threaded connection with the fixed cone, and the pressing plate is abutted against and matched with the axial side end of the expansion column.
By adopting the design, the rotary pressing plate can drive the screw rod to screw and push the expansion column, and the jacking of the pressing plate reduces the deviation of the expansion column when expanding.
In one possible design, the platen is cylindrical with a center of its outer surface having a top pinhole.
By adopting the design, the ejector pin on the machine tool can be inserted into the ejector pin hole in an ejector pin pressing mode, the center of clamping of the tool is improved, and the machining quality is improved.
In one possible design, the edge of the platen is notched.
By adopting the design, the tool can be inserted into the notch groove, and the knocking tool enables the pressing plate to be screwed tightly, so that the valve ball can be stably clamped on the tool.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
FIG. 2 is a cross-sectional view of an embodiment of the present utility model;
FIG. 3 is a schematic view of the structure of the valve ball according to the present utility model;
FIG. 4 is an exploded view of an embodiment of the present utility model;
wherein, 1, fixing the cone; 2. a central screw; 3. an expansion column; 31. a column block; 4. an elastic sleeve; 11. a conical surface; 32. a hollow cavity; 5. a valve ball; 33. a tapered opening; 12. a cylindrical surface; 34. a ring groove; 21. a screw; 22. a pressing plate; 221. a top pinhole; 222. notch groove.
Description of the embodiments
The simple clamping tool for the valve ball shown in fig. 1-4 comprises a fixed cone 1, a central screw 2 and an expansion column 3, wherein the expansion column 3 is formed by splicing at least two column blocks 31 to form a whole cylinder shape, an elastic sleeve 4 is sleeved on the expansion column 3, the elastic sleeve 4 is tightly sleeved on each column block 31 in an elastic compression mode, and the elastic sleeve 4 can generate certain normal pressure to enable the expansion column 3 to have reset acting force of inward shrinkage. The outer surface of the fixed cone 1 is provided with a conical surface 11, the expansion column 3 is provided with a hollow cavity 32 along the central axis thereof, and the conical surface 11 is matched with the hollow cavity 32 to expand the expansion column 3 to be propped against the valve ball 5; the central screw 2 penetrates through the hollow cavity 32 to be in threaded connection with the fixed cone 1, and one end of the central screw 2 is abutted against the axial side end of the expansion column 3. The fixed cone 1 is arranged on a machine tool with rotary action, such as a three-jaw chuck of a lathe, the valve ball 5 is sleeved outside the expansion column 3, the central screw 2 is rotated, the expansion column 3 contacted with one end of the central screw 2 is pushed towards the fixed cone 1, the expansion column 3 is gradually expanded outwards due to the cooperation of the conical surface 11 and the hollow cavity 32, each column block 31 is gradually separated and moves outwards in radial direction, the outer wall of the column block 31 is propped against the runner wall of the valve ball 5, the expansion column 3 and the valve ball 5 are relatively fixed, the valve ball 5 is clamped, and then related operations such as turning, grinding and the like of excircle machining can be performed. The central screw 2 can be screwed by means of manpower, the operation is simple and convenient, the cost is lower, the structure is simple, and the device is suitable for processing enterprises for controlling the cost.
One side of the hollow cavity 32 is provided with a conical opening 33, the conical opening 33 is matched with the conical surface 11 to form inclined-surface staggered fit, so that the expansion column 3 expands along the radial direction as much as possible, and the situation that the expansion distances of the two axial sides of the expansion column 3 are inconsistent is reduced.
The fixed cone 1 has two or more cone surfaces 11, and a cylindrical surface 12 for transition is provided between each cone surface 11, and the taper of each cone surface 11 is identical to the taper of the cone opening 33. Because the fixed cone 1 fixed on the machine tool is not easy to detach, the valve ball 5 with different caliber sizes can be adapted by utilizing the multilayer conical surface 11, and the fixed cone 1 does not need to be detached for replacement.
A plurality of annular grooves 34 are formed in the peripheral wall of the expansion column 3, the elastic sleeve 4 is installed in the annular grooves 34, and the annular grooves 34 are used for limiting the elastic sleeve 4. In addition, the elastic sleeve 4 is placed in the annular groove 34 without exceeding the peripheral wall surface of the expansion column 3, preventing the elastic sleeve 4 from interfering with the flow passage wall of the valve ball 5.
The elastic sleeve 4 is an elastic sleeve 4 such as a spring ring or a rubber band, and the like, and is characterized by having an elastic force of radially inward contraction, so that after the valve ball 5 is processed, each column block 31 can be reset to form a cylindrical expansion column 3.
The central screw member 2 comprises a screw rod 21 and a pressing plate 22 at one end of the screw rod 21, the screw rod 21 penetrates through the hollow cavity 32 and is in threaded connection with the fixed cone 1, and the pressing plate 22 is abutted against and matched with the axial side end of the expansion column 3. The rotating pressing plate 22 can drive the screw rod 21 to screw and push the expansion column 3, the inner surface of the pressing plate 22 can be attached to the axial side end face of the expansion column 3 by the supporting of the pressing plate 22, and the phenomenon that the expansion distances of the two axial side end faces are inconsistent when the expansion column 3 expands is reduced.
The pressing plate 22 is cylindrical, a thimble hole 221 is formed in the center of the outer surface of the pressing plate, and a thimble on a machine tool can be inserted into the thimble hole 221 in a jacking mode, so that the center degree of clamping of the tool is improved, and the machining quality is improved.
The edge of the pressing plate 22 is provided with a notch groove 222, a tool can be inserted into the notch groove 222, the pressing plate 22 is tightly screwed by knocking the tool, and the expansion column 3 is tightly pressed on the runner wall of the valve ball 5, so that the fixture is more firmly fixed.
Claims (8)
1. Simple clamping tool for valve ball is characterized in that: the device comprises a fixed cone (1), a central screw (2) and an expansion column (3), wherein the expansion column (3) is formed by splicing at least two column blocks (31), an elastic sleeve (4) is sleeved on the expansion column (3), and the elastic sleeve (4) is elastically pressed and sleeved on each column block (31); the outer surface of the fixed cone (1) is provided with a conical surface (11), the expansion column (3) is axially provided with a hollow cavity (32), and the conical surface (11) is matched with the hollow cavity (32) to expand the expansion column (3) to be propped in the valve ball (5); the central screw (2) penetrates through the hollow cavity (32) to be in threaded connection with the fixed cone (1), and one end of the central screw (2) is matched with the axial side end of the expansion column (3) in a propping mode.
2. The simple clamping tool for a valve ball according to claim 1, wherein: one side of the hollow cavity (32) is provided with a conical opening (33), and the conical opening (33) is matched with the conical surface (11) to form inclined staggered fit.
3. The simple clamping tool for a valve ball according to claim 2, wherein: the fixed cone (1) is provided with more than two layers of conical surfaces (11), a cylindrical surface (12) is arranged between each layer of conical surfaces (11), and the taper of each layer of conical surface (11) is consistent with the taper of the conical opening (33).
4. The simple clamping fixture of a valve ball according to claim 1 or 2, characterized in that: the peripheral wall of the expansion column (3) is provided with a plurality of ring grooves (34), the elastic sleeve (4) is installed in the ring grooves (34), and the elastic sleeve (4) does not exceed the peripheral wall surface of the expansion column (3) when placed in the ring grooves (34).
5. The simple clamping tool for the valve ball according to claim 4, wherein: the elastic sleeve (4) is a spring ring or a rubber band.
6. The simple clamping fixture of a valve ball according to claim 1 or 2, characterized in that: the center screw (2) comprises a screw (21) and a pressing plate (22) at one end of the screw (21), the screw (21) penetrates through the hollow cavity (32) and is in threaded connection with the fixed cone (1), and the pressing plate (22) is matched with the axial side end of the expansion column (3) in a propping mode.
7. The simple clamping tool for a valve ball according to claim 6, wherein: the pressing plate (22) is cylindrical, and a top pinhole (221) is formed in the center of the outer surface of the pressing plate.
8. The simple clamping tool for a valve ball according to claim 6, wherein: the edge of the pressing plate (22) is provided with a notch groove (222).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322581630.XU CN220761800U (en) | 2023-09-22 | 2023-09-22 | Simple clamping tool for valve ball |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322581630.XU CN220761800U (en) | 2023-09-22 | 2023-09-22 | Simple clamping tool for valve ball |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220761800U true CN220761800U (en) | 2024-04-12 |
Family
ID=90599039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322581630.XU Active CN220761800U (en) | 2023-09-22 | 2023-09-22 | Simple clamping tool for valve ball |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220761800U (en) |
-
2023
- 2023-09-22 CN CN202322581630.XU patent/CN220761800U/en active Active
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