CN218575910U - High-precision clamping device for double-thimble oil pressure expanding shaft type safety valve sleeve - Google Patents
High-precision clamping device for double-thimble oil pressure expanding shaft type safety valve sleeve Download PDFInfo
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- CN218575910U CN218575910U CN202222770520.3U CN202222770520U CN218575910U CN 218575910 U CN218575910 U CN 218575910U CN 202222770520 U CN202222770520 U CN 202222770520U CN 218575910 U CN218575910 U CN 218575910U
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Abstract
The utility model relates to a high-precision clamping device of a double-thimble oil pressure expansion shaft type safety valve sleeve, wherein a left thimble tightly props up the left end of an oil pressure expansion shaft, and a right thimble tightly props up the right end of the oil pressure expansion shaft; the oil pressure expansion shaft comprises a main shaft, an oil storage cavity, an axial oil duct, an oil pressure bolt, a sliding sealing plug, a first radial oil duct, a first floating expansion core groove, a first floating expansion core, a first limiting pin, a second radial oil duct, a second floating expansion core groove, a second floating expansion core, a second limiting pin and a fixed plug. The utility model discloses at the big interior circle and the little interior circle of centre gripping safety valve barrel simultaneously at the during operation, greatly increased centre gripping length, improved the stability of work piece clamping, and then improved the size precision of work piece processing.
Description
Technical Field
The utility model relates to a clamping device, specifically speaking are two thimble oil pressure shaft type safety valve barrel's that rises high accuracy clamping device.
Background
The safety valve sleeve is a part on the safety valve, and the machining precision of the safety valve sleeve directly influences the sealing performance of the safety valve. The large outer circle and the right-end conical surface of the safety valve sleeve both need to be ground, the front-end conical surface is very important after assembly and needs to be ground after one-time clamping with the large outer circle, the requirement for grinding the front-end conical surface is higher (the requirement for jumping between the right-end conical surface and a clamping inner hole is 0.02 mm), the requirement for grinding the front-end conical surface of the safety valve sleeve cannot be met by using the clamping inner hole as a grinding machining reference in the existing common grinding machining, the clamping rigidity is not good, the jumping between the central axis of the expanding core and the central axis of the safety valve sleeve cannot be guaranteed within 0.01mm in a static state, and the central axis of the safety valve sleeve cannot be aligned due to the fact that the common clamping part of the expanding core is too short.
Disclosure of Invention
The utility model aims at overcoming the not enough of existence among the prior art, provide one kind and can improve clamping precision and stability and convenient operation's the high accuracy clamping device of the shaft type safety valve barrel that rises of two thimble oil pressure.
According to the technical scheme provided by the utility model, the high-precision clamping device of the double-thimble oil pressure expansion shaft type safety valve sleeve comprises a left thimble, an oil pressure expansion shaft and a right thimble, wherein the left thimble tightly props the left end of the oil pressure expansion shaft, and the right thimble tightly props the right end of the oil pressure expansion shaft;
the oil pressure expansion shaft comprises a transverse main shaft, an oil storage cavity and an axial oil duct which are mutually communicated are arranged in the main shaft along the axial direction of the main shaft, the diameter of the oil storage cavity is larger than that of the axial oil duct, the oil storage cavity is positioned on the left side of the axial oil duct, an oil pressure bolt and a sliding sealing plug are arranged on the left side of the oil storage cavity, an outer step is arranged on the main shaft corresponding to the axial oil duct, the big end of the outer step is positioned on the left side of the small end, a plurality of first radial oil ducts which are radially arranged are arranged in the main shaft corresponding to the big end of the outer step, the inner end of each first radial oil duct is communicated with the axial oil duct, a first floating expansion core groove is formed in the main shaft corresponding to the outer end of each first radial oil duct and communicated with the first radial oil duct, a first floating expansion core is arranged in the first floating core groove, a first limiting pin is fixed in the first floating core groove, and a first limiting pin hole is formed in the first floating core;
a plurality of second radial oil ducts which are radially arranged are arranged in a main shaft corresponding to the middle small head position of the outer step, the inner end part of each second radial oil duct is communicated with the axial oil duct, a second floating core expansion groove is formed in the main shaft corresponding to the outer end part of each second radial oil duct and communicated with the second radial oil duct, a second floating core expansion core is arranged in each second floating core expansion groove, a second limiting pin is fixed in each second floating core expansion groove, a second limiting pin hole is formed in each second floating core expansion core, each second floating core expansion core is sleeved on each second limiting pin through each second limiting pin hole, and a fixed plug used for plugging the axial oil duct is arranged in the main shaft on the right side of each second radial oil duct.
Preferably, the first floating expansion core has an outer step.
Preferably, the fixed plug comprises a steel ball and a threaded plug on the right side of the steel ball.
The utility model discloses at the big interior circle and the little interior circle of centre gripping safety valve barrel simultaneously at the during operation, greatly increased centre gripping length, improved the stability of work piece clamping, and then improved the size precision of work piece processing.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
The utility model discloses a high accuracy clamping device of two thimble oil pressure rising shaft formula safety valve barrel, as shown in fig. 1, it includes left thimble 1, oil pressure rising shaft 2 and right thimble 3, left thimble 1 withstands the left end of oil pressure rising shaft 2, right thimble 3 withstands the right-hand member of oil pressure rising shaft 2;
the oil pressure expansion shaft 2 comprises a transverse main shaft 2.1, a cylindrical oil storage cavity 2.2 and an axial oil duct 2.3 which are mutually communicated are arranged in the main shaft 2.1 along the axial direction of the main shaft, the diameter of the oil storage cavity 2.2 is larger than that of the axial oil duct 2.3, the oil storage cavity 2.2 is positioned on the left side of the axial oil duct 2.3, an oil pressure bolt 2.4 and a sliding sealing plug 2.5 are installed on the left side of the oil storage cavity 2.2, the main shaft 2.1 corresponding to the axial oil duct 2.3 is provided with an outer step, the large head end of the outer step is positioned on the left side of the small head end, a plurality of first radial oil ducts 2.6 which are radially arranged are arranged in the main shaft 2.1 corresponding to the large head end of the outer step, the inner end of each first radial oil duct 2.6 is communicated with the axial oil duct 2.3, a first floating core groove 2.7 is formed in the main shaft 2.1 corresponding to the large head position of each first radial oil duct 2.6, the first floating core groove 2.7 is provided with a floating core pin hole, the first floating core 2.7 is fixedly sleeved in the first floating core groove, and a first floating core pin 8.8 is arranged in the first floating core 2.7, and a first floating core pin is arranged in the first floating core 2.8 is arranged in the first floating core pin hole 2.7;
a plurality of second radial oil ducts 2.10 which are radially arranged are formed in the main shaft 2.1 corresponding to the middle small head position of the outer step, the inner end of each second radial oil duct 2.10 is communicated with the axial oil duct 2.3, a second floating core expansion groove 2.11 is formed in the main shaft 2.1 corresponding to the outer end of each second radial oil duct 2.10, each second floating core expansion groove 2.11 is communicated with the corresponding second radial oil duct 2.10, a second floating core expansion 2.12 is installed in each second floating core expansion groove 2.11, a second limit pin 2.13 is fixed in each second floating core expansion groove 2.11, a second limit pin hole is formed in each second floating core expansion 2.12, each second floating core expansion 2.12 is sleeved on each second limit pin 2.13 through each second limit pin hole, and a fixed plug 2.14 for plugging the axial oil ducts 2.3 is arranged in the main shaft 2.1 on the right side of each second radial oil duct 2.10.
The first floating expanding core 2.8 is provided with an outer step.
The fixed plug 2.14 comprises a steel ball and a threaded plug on the right side of the steel ball.
When the hydraulic floating expansion valve works, the safety valve sleeve 4 is sleeved in from the right end of the hydraulic expansion shaft 2, so that the left end face of the safety valve sleeve 4 is in contact with the step face of the first floating expansion core 2.8, at the moment, the large inner hole of the safety valve sleeve 4 reaches the position of the first floating expansion core 2.8, and the small inner hole of the safety valve sleeve 4 reaches the position of the second floating expansion core 2.12. And (3) rotating the oil pressure bolt 2.4 rightwards to enable the oil pressure bolt 2.4 to push the sliding sealing plug 2.5 to slide rightwards, and pushing out a first floating expansion core 2.8 in a first floating expansion core groove 2.7 and a second floating expansion core 2.12 in a second floating expansion core groove 2.11 along the radial direction of the main shaft 2.1 by hydraulic oil to clamp the semi-finished safety valve sleeve 4.
The oil pressure expanding shaft 2 is arranged on a grinding machine, the oil pressure expanding shaft 2 is tightly propped by the left thimble 1 and the right thimble 3, and then the large outer circle 4.1 of the safety valve sleeve and the conical surface 4.2 of the right end of the safety valve sleeve 4 can be ground.
After the grinding process is finished, the oil pressure expansion shaft 2, the left-handed oil pressure bolt 2.4, the first floating expansion core 2.8 and the second floating expansion core 2.12 are taken down and contract inwards along the radial direction of the main shaft 2.1, and then the safety valve sleeve can be taken down.
The first limit pin 2.9 fixed in the first floating core expansion groove 2.7 is used for preventing the axial movement of the first floating core expansion 2.8, and the second limit pin 2.13 fixed in the second floating core expansion groove 2.11 is used for preventing the axial movement of the second floating core expansion 2.12.
Because the utility model discloses at the big interior circle and the little interior circle of centre gripping safety valve barrel 4 simultaneously at the during operation, greatly increased centre gripping length, improved the stability of work piece clamping, and then improved the size precision of work piece processing.
Claims (3)
1. The utility model provides a high accuracy clamping device of two thimble oil pressure rising shaft type safety valve barrel which characterized by: the hydraulic oil pressure expansion device comprises a left thimble (1), an oil pressure expansion shaft (2) and a right thimble (3), wherein the left thimble (1) tightly pushes the left end of the oil pressure expansion shaft (2), and the right thimble (3) tightly pushes the right end of the oil pressure expansion shaft (2);
the oil pressure expanding shaft (2) comprises a transverse main shaft (2.1), an oil storage cavity (2.2) and an axial oil duct (2.3) which are communicated with each other are arranged in the main shaft (2.1) along the axial direction of the main shaft, the diameter of the oil storage cavity (2.2) is larger than that of the axial oil duct (2.3), the oil storage cavity (2.2) is positioned on the left side of the axial oil duct (2.3), an oil pressure bolt (2.4) and a sliding sealing plug (2.5) are arranged on the left side of the oil storage cavity (2.2), the main shaft (2.1) corresponding to the axial oil passage (2.3) is provided with an outer step, the big end of the outer step is positioned at the left side of the small end, a plurality of first radial oil ducts (2.6) which are arranged in the radial direction are arranged in a main shaft (2.1) corresponding to the position of the large end in the outer step, the inner end part of each first radial oil duct (2.6) is communicated with an axial oil duct (2.3), a first floating core expanding groove (2.7) is arranged on the main shaft (2.1) corresponding to the outer end part of each first radial oil channel (2.6), the first floating core expanding groove (2.7) is communicated with the first radial oil channel (2.6), a first floating expansion core (2.8) is arranged in the first floating expansion core groove (2.7), a first limit pin (2.9) is fixed in the first floating core expanding groove (2.7), a first limit pin hole is formed in the first floating expansion core (2.8), and the first floating expansion core (2.8) is sleeved on the first limit pin (2.9) through the first limit pin hole;
a plurality of second radial oil ducts (2.10) which are radially arranged are formed in a main shaft (2.1) corresponding to the middle small head position of the outer step, the inner end part of each second radial oil duct (2.10) is communicated with an axial oil duct (2.3), a second floating core expansion groove (2.11) is formed in the main shaft (2.1) corresponding to the outer end part of each second radial oil duct (2.10), each second floating core expansion groove (2.11) is communicated with the corresponding second radial oil duct (2.10), a second floating core expansion (2.12) is installed in each second floating core expansion groove (2.11), a second limiting pin (2.13) is fixed in each second floating core expansion groove (2.11), a second limiting pin hole is formed in each second floating core expansion (2.12), each second floating core expansion (2.12) is sleeved on each second limiting pin (2.13) through each second limiting pin hole, and a fixed type plug (2.14) for plugging the corresponding axial oil duct (2.1) on the right side of each second radial oil duct (2.10) is arranged in each second radial oil duct (2.10).
2. The high-precision clamping device for the double-thimble oil pressure expansion shaft type safety valve sleeve as claimed in claim 1, is characterized in that: the first floating expansion core (2.8) is provided with an outer step.
3. The high-precision clamping device for the double-thimble oil pressure expansion shaft type safety valve sleeve as claimed in claim 1, is characterized in that: the fixed plug (2.14) comprises a steel ball and a threaded plug on the right side of the steel ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222770520.3U CN218575910U (en) | 2022-10-20 | 2022-10-20 | High-precision clamping device for double-thimble oil pressure expanding shaft type safety valve sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222770520.3U CN218575910U (en) | 2022-10-20 | 2022-10-20 | High-precision clamping device for double-thimble oil pressure expanding shaft type safety valve sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218575910U true CN218575910U (en) | 2023-03-07 |
Family
ID=85374529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222770520.3U Active CN218575910U (en) | 2022-10-20 | 2022-10-20 | High-precision clamping device for double-thimble oil pressure expanding shaft type safety valve sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218575910U (en) |
-
2022
- 2022-10-20 CN CN202222770520.3U patent/CN218575910U/en active Active
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