CN202956307U - Pressure self-compensating plunger structure of triaxial pressure room - Google Patents
Pressure self-compensating plunger structure of triaxial pressure room Download PDFInfo
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- CN202956307U CN202956307U CN 201220365930 CN201220365930U CN202956307U CN 202956307 U CN202956307 U CN 202956307U CN 201220365930 CN201220365930 CN 201220365930 CN 201220365930 U CN201220365930 U CN 201220365930U CN 202956307 U CN202956307 U CN 202956307U
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- plunger
- pressure
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Abstract
The utility model discloses a pressure self-compensating plunger structure of a triaxial pressure room. The pressure self-compensating plunger structure of the triaxial pressure room is characterized in that a column chamber is arranged on the upper portion of a pressure room, a plunger is arranged inside the column chamber, the plunger is a cylinder with three variable cross-sections, diameters of the middle section of the cylinder is bigger than those of both upper section and lower section, wherein, the cross sectional area of the lower section of the plunger is equal to a surplus annular cross sectional area after using the cross sectional area of the middle section minus the cross sectional area of the upper section, a piston is formed on the middle section of the plunger, the lower portion diameter and the upper portion diameter of the column chamber are respectively matched with the lower section diameter and the upper section diameter of the cylinder, and upper annular space and lower annular space which are abbreviated as an upper annular chamber and a lower annular chamber are formed by the column chamber after assembly; a ventilating channel which is communicated with the upper annular chamber is arranged on the pressure room, and the ventilating channel which enables the bottom surface of the cylinder to be communicated with the upper annular chamber is arranged on the cylinder. The pressure self-compensating plunger structure of the triaxile pressure room can offset the surrounded pressure in the triaxile pressure room, automatically compensate the plunger structure of unbalanced force, and guarantee successful proceeding of an inner room test about rock mechanics.
Description
Technical field
The utility model relates to pressure experimental device, relates in particular to triaxial cell.
Background technology
In the rock mechanics indoor test, triaxial cell has been widely used in the rock mechanics indoor test.The piston structure that conventional triaxial cell uses is an equal diameter cylinder and post chamber, and indoor confined pressure counter-force effect usually can be under pressure while applying axle pressure.After confined pressure is greater than the pressure that pressing machine imposes on plunger, occur that plunger is ejected the phenomenon of pressure chamber.Otherwise, after the pressure that is applied to plunger when pressure chamber is greater than confined pressure, due to the continuous displacement of plunger, pressure chamber's inner fluid volume is reduced, increase again to a certain extent confined pressure.Therefore, be necessary to design and a kind ofly can offset confined pressure, the piston structure of auto-compensation out-of-balance force.
Summary of the invention
The purpose of this utility model be to design a kind of in the indoor elimination confined pressure of triaxial pressure the piston structure to the plunger counter-force, be called the pressure autocompensation piston structure.
A kind of pressure autocompensation piston structure of triaxial cell, it is to be provided with the post chamber on the top of pressure chamber, post is provided with plunger in chamber, it is characterized in that, the right cylinder that above-mentioned plunger is three variable cross sections, the diameter of cylindrical stage casing part is greater than the diameter of epimere and hypomere, wherein, the cross-sectional area of plunger hypomere equals the stage casing sectional area and deducts remaining annular cross-sectional area after the epimere sectional area, the stage casing part forms piston in the post chamber, the lower diameter in post chamber and upper diameter coordinate with cylindrical hypomere diameter and epimere diameter respectively, after assembling, make the post chamber form, lower two annuluses, ring cavity and lower ring cavity on abbreviation, be provided with the venting channels communicated with upper ring cavity in pressure chamber, be provided with the venting channels that cylindrical bottom surface is communicated with upper ring cavity on right cylinder.
In order to guarantee sealing, on piston, with top and the bottom, post chamber, be equipped with O-ring seal.
For the ease of installing, at first top, post chamber is processed into and isodiametric post chamber, middle part, post chamber, a ring set is installed on top, post chamber after the plunger of packing into.
Below according to principle of work of the present utility model, its advantage is described.
After the startup oil pressure pump is to the supercharging of pressure chamber's internal hydraulic pressure oil, because pressure chamber is communicated with upper cavity, both pressure equate, it is oppositely equivalent that this just makes plunger bottom surface pressure and piston-top surface bear pressure, this just guarantees that plunger is in the stress balance state, neither there will be plunger is ejected, also meet sample and apply axle pressure.When the continuous displacement of plunger, the Pneumatic pipe cleaner in pressure chamber is crossed venting channels and is communicated with atmosphere, not there will be plunger to be ejected the phenomenon of pressure chamber.
The accompanying drawing explanation
Below in conjunction with attached Fig. 1 and 2, the utility model embodiment is described in further details.
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is piston structure schematic diagram in the utility model embodiment.
In figure: 1-plunger, 2-plunger epimere, 3-plunger stage casing, 4-plunger hypomere, 5-ring set, ring cavity under 6-, 7-venting channels, 8-the first O-ring seal, 9-the second O-ring seal, 10-the 3rd O-ring seal, 11-the 4th O-ring seal, 12-pressure chamber, 13-oiling pipeline, 14-chassis, the upper ring cavity of 15-.
Embodiment
As depicted in figs. 1 and 2, a kind of pressure autocompensation piston structure of triaxial cell, it is to be provided with the post chamber on 12De top, pressure chamber, be provided with plunger 1 in the post chamber, the right cylinder that above-mentioned plunger 1 is three variable cross sections, the diameter in plunger stage casing 3 is greater than the diameter of plunger epimere 2 and plunger hypomere 4, wherein, the cross-sectional area of plunger hypomere 4 equals plunger stage casing 3 sectional areas and deducts remaining annular cross-sectional area after plunger epimere 2 sectional areas, plunger stage casing 3 forms piston in the post chamber, the lower diameter in post chamber and upper diameter coordinate with plunger hypomere 4 diameters and plunger epimere 2 diameters respectively, after assembling, make the post chamber form, lower two annuluses, ring cavity 15 and lower ring cavity 6 on abbreviation, be provided with the venting channels 7 communicated with upper ring cavity 15 in pressure chamber 12, also be provided with the venting channels 7 that the bottom surface that makes plunger 1 communicates with upper ring cavity 15 on plunger 1.Be provided with the second O-ring seal 9 on plunger stage casing 3, top and the bottom, post chamber are provided with respectively the first O-ring seal 8 and the 3rd O-ring seal 10, and 12De chassis, pressure chamber 14 is provided with the 4th O-ring seal 11 and oiling pipeline 13.
For the ease of installing, at first top, post chamber is processed into and isodiametric post chamber, middle part, a ring set 5 is installed on top, post chamber after the plunger 1 of packing into.
Claims (3)
1. the pressure autocompensation piston structure of a triaxial cell, it is to be provided with the post chamber on the top of pressure chamber, post is provided with plunger in chamber, it is characterized in that, the right cylinder that above-mentioned plunger is three variable cross sections, the diameter of cylindrical stage casing part is greater than the diameter of epimere and hypomere, wherein, the cross-sectional area of plunger hypomere equals the stage casing sectional area and deducts remaining annular cross-sectional area after the epimere sectional area, the stage casing part forms piston in the post chamber, the lower diameter in post chamber and upper diameter coordinate with cylindrical hypomere diameter and epimere diameter respectively, after assembling, make the post chamber form, lower two annuluses, ring cavity and lower ring cavity on abbreviation, be provided with the venting channels communicated with upper ring cavity in pressure chamber, be provided with the venting channels that cylindrical bottom surface is communicated with upper ring cavity on right cylinder.
2. pressure autocompensation piston structure as claimed in claim 1, is characterized in that, on piston and upper and lower part, post chamber be equipped with O-ring seal.
3. pressure autocompensation piston structure as claimed in claim 1 or 2, is characterized in that, be processed into and isodiametric post chamber, middle part, post chamber on top, post chamber, after the plunger of packing into, on top, post chamber, a ring set is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220365930 CN202956307U (en) | 2012-07-18 | 2012-07-18 | Pressure self-compensating plunger structure of triaxial pressure room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220365930 CN202956307U (en) | 2012-07-18 | 2012-07-18 | Pressure self-compensating plunger structure of triaxial pressure room |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202956307U true CN202956307U (en) | 2013-05-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220365930 Expired - Fee Related CN202956307U (en) | 2012-07-18 | 2012-07-18 | Pressure self-compensating plunger structure of triaxial pressure room |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202956307U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398370A (en) * | 2018-04-25 | 2018-08-14 | 山东科技大学 | A kind of experimental rig and test method measuring coal deformation process when gas flows |
| CN108717020A (en) * | 2018-05-24 | 2018-10-30 | 大连理工大学 | A kind of both arms Equidirectional type dynamic water pressure compensation device |
| CN109030318A (en) * | 2018-09-11 | 2018-12-18 | 中国科学院地质与地球物理研究所 | A kind of pressure chamber structure and permeability test macro |
-
2012
- 2012-07-18 CN CN 201220365930 patent/CN202956307U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398370A (en) * | 2018-04-25 | 2018-08-14 | 山东科技大学 | A kind of experimental rig and test method measuring coal deformation process when gas flows |
| CN108398370B (en) * | 2018-04-25 | 2024-03-22 | 山东科技大学 | Test device and test method for measuring deformation process of coal body during gas flow |
| CN108717020A (en) * | 2018-05-24 | 2018-10-30 | 大连理工大学 | A kind of both arms Equidirectional type dynamic water pressure compensation device |
| CN109030318A (en) * | 2018-09-11 | 2018-12-18 | 中国科学院地质与地球物理研究所 | A kind of pressure chamber structure and permeability test macro |
| CN109030318B (en) * | 2018-09-11 | 2024-04-02 | 中国科学院地质与地球物理研究所 | Pressure chamber structure and permeability testing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130529 Termination date: 20160718 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |