CN2532474Y - Piston type uniform distributed pressure loader - Google Patents
Piston type uniform distributed pressure loader Download PDFInfo
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- CN2532474Y CN2532474Y CN 02213775 CN02213775U CN2532474Y CN 2532474 Y CN2532474 Y CN 2532474Y CN 02213775 CN02213775 CN 02213775 CN 02213775 U CN02213775 U CN 02213775U CN 2532474 Y CN2532474 Y CN 2532474Y
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- urn
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Abstract
The utility model is structured as that an urn is fixedly connected with a motherboard, an oil intake connection and an oil scavenging collection are arranged on the urn, and the upper end is enclosed by an oil urn lid; a plurality of communicated hollow cavities are arranged in the urn, a piston is arranged in each hollow cavity, and each piston is fixedly connected with a force conveying board through an adjustable screw rod. The utility model which has reasonable structure and good performance not only overcomes the disadvantage in the prior art, but also meets the loading experiment requirement of various models; and both equal loading and stepped loading can be loaded on a model, and the requirement to uneven deformation on the model surface can be met. The experiment shows that the integral power output is in linear relationship with the oil pressure, a large scale even strain field can be produced in the model body, and the distribution form and value of the strain field are both very close to the theoretical computed result, therefore the expected effect is achieved.
Description
Affiliated technical field
The utility model belongs to geomechanical model test loading equipemtn technical field, and what relate generally to is a kind of piston type well-distributed pressure loader.
Background technology
The model boundary loading technique is a gordian technique in the geomechanical model test, because it is directly connected to model boundary and loads effect and precision, also directly influence the degree of uniformity of formed stress (strain) field in the model block, can meet the engineering actual forced status to the model test result and play crucial effects.From existing model loading technique, that generally uses has following two kinds of load modes: the one, and cooperate triangle to divide cloth that model boundary is loaded with ordinary jack, the 2nd, with the flexible rubber capsule model boundary is loaded.This dual mode also can solve some engineering problems under the less demanding situation of test accuracy.Expansion gradually along with project scale, improving constantly of precision prescribed, these two kinds of load mode exposed day by day go out the drawback of its existence: (1), cooperate triangle to divide cloth on-load pressure homogeneity deviation bigger with lifting jack, cause model internal strain field uniformity very poor, be difficult to reflect strictly according to the facts the engineering stress; (2), load with the flexible rubber capsule, its load homogeneity still can, but its stroke is less, load intensity is on the low side, can't satisfy the requirement of model moderate finite deformation and higher-strength, thereby its scope of application has been subjected to considerable restraint.Moreover it makes trouble, waste time and energy, and serviceable life is also very short, generally can only satisfy the single test needs.
Summary of the invention
The purpose of this utility model promptly produces thus, proposes a kind of piston type well-distributed pressure loader.Rational in infrastructure, the function admirable of this loader can satisfy the requirement of different model load tests.
For achieving the above object, the utility model is realized by following technology: be fixedly connected with cylinder body on base plate, this cylinder body is provided with fuel inlet fitting and back leakage connection, the upper end is sealed by oil cylinder cover, cylinder interior is distributed with the cavity of a plurality of connections, be equipped with piston in each cavity, each piston is all fixedlyed connected with force transmitting board by adjusting screw rod.
The utility model is rational in infrastructure, function admirable.It is on a very little area several pistons to be set evenly, and the whole shared oil pressure of these pistons, or the shared oil pressure of same row (row).According to the probability equilibrium principle in the theory of errors, in the measurement of same precision, the probability that the positive negative error that absolute value is identical produces equates.Therefore, these pistons exert oneself in (referring to same oil circuit, same oil pressure) big and the little effect of cancelling each other of exerting oneself, the uniformity coefficient that makes pressure under the loader announce improves greatly.In addition, because the oil pressure of these pistons is identical, but displacement is independently, thereby it is very strong to the adaptive faculty of the nonaffine deformation of model surface, even the model surface distortion is inhomogeneous, it also can produce well-distributed pressure preferably.The 3rd, the stroke of each piston can be set arbitrarily, thereby can satisfy the big requirement of weak dielectric model surface deformation well.The utility model is gone up on probation at " the multi-functional simulation test device of Geotechnical Engineering ", result of use is good, the drawback that had both overcome existing loading technique existence (promptly uses lifting jack on-load pressure homogeneity deviation big, less than normal with flexible bags loading stroke, load intensity is on the low side, serviceable life is short), satisfied the requirement of different model load tests again.Both can on model, add evenly load, can add the stepped appearance load again, and can satisfy the requirement of model surface nonaffine deformation.Verification experimental verification, this loader integral body are exerted oneself and the oil pressure relation of being in line, and can produce large-scale homogeneous strain field in the model block, and the distributional pattern of strain field and numerical value are all quite approaching with the Theoretical Calculation result, produce a desired effect.
Description of drawings
The utility model has following accompanying drawing:
Accompanying drawing 1 is a vertical view of the present utility model.
Accompanying drawing 2 is a cut-open view of the present utility model.
Accompanying drawing 3 is the synoptic diagram of the utility model in model test.
Among the figure, 1, back leakage connection, 2, fuel inlet fitting, 3, packing ring, 4, shutoff, 5, hexagon socket head cap screw, 6, oil suction chamber, 7, oil back chamber, 8, force transmitting board, 9, hexagon socket head cap screw, 10, packing ring, 11, base plate, 12, O type circle, 13, shutoff, 14, O type circle, 15, cylinder body, 16, piston, 17, shutoff, 18, O type circle, 19, the oil cylinder loam cake, 20, O type circle.
Embodiment
In conjunction with the accompanying drawings, it is as follows to provide embodiment of the present utility model:
As shown in Figure 2, present embodiment is to be fixedly connected with cylinder body 15 by hexagon socket head cap screw 5 on a plane bottom plate 11, and this cylinder body 15 is a combined cylinder-block-crankcase unit, which is provided with back leakage connection 1 and fuel inlet fitting 2, and the upper end is by 19 sealings of oil cylinder loam cake.Cylinder body 15 is distributed with the cavity of a plurality of connections, is equipped with piston 16 in each cavity, is provided with between the bottom of this piston 16 and cavity and is provided with oil back chamber 7 between oil suction chamber 6, top and cavity, is sealed by O type circle 14 between oil suction chamber 6 and oil back chamber 7.Each piston 16 is all fixedlyed connected with force transmitting board 8 by adjusting screw rod 21.The bottom of adjusting screw rod 21 is threaded with piston 16, and its top is connected by hexagon socket head cap screw 9 and packing ring 10 ball pivots with force transmitting board 9, and promptly each force transmitting board all can tilt in certain angle, to satisfy model surface distortion or irregular requirement.Oil pressure in the whole cylinder body can be provided by hand oil pump or electric oil pump, is delivered to the cylinder interior oil piping system by high-pressure oil pipe by tubing sub.Can a shared oil pressure between each small oil tank, also can a row or the shared oil pressure of row, to satisfy the different requirements that model boundary loads.If add evenly load, then the shared oil piping system of each small oil tank provides identical oil pressure, by valve piston pressure is passed to force transmitting board, is delivered on the model surface again; If add the stepped appearance load, the shared oil piping system of small oil tank on each row (or row) then, each oil extraction cylinder oil pressure does not wait, so that apply the stepped appearance load to model.
As shown in Figure 3, it is the application of present embodiment on " the multi-functional simulation test device of Geotechnical Engineering ", and this is a plane stress model test.Before test, earlier well-distributed pressure loader D is installed on the bearing frame A, and oil pump oil hydraulic system and well-distributed pressure loader D is connected, Model B is positioned in the bearing frame A then, carry out load test with high-pressure oil pipe.During uniform pressure loader D work, earlier oil return valve is opened, oil pressure enters in the oil suction chamber of cylinder body from tubing sub, at this moment, nine pistons begin to travel forward under the oil pressure effect, and pressure is passed to force transmitting board, oil pressure is delivered on the surface of test model B by force transmitting board again, this moment, model surface began stressedly, require to measure strain (or stress) distribution in the load drag bodies at different levels according to different tests, finished experimental test work.When model loads end, open the oil-feed valve, oil pressure enters oil back chamber by back leakage connection; Promote piston and move backward, be retracted to original position, this moment the removal Model B, off-test.
Claims (3)
1, a kind of piston type well-distributed pressure loader, it is characterized in that: on base plate (11), be fixedly connected with cylinder body (15), this cylinder body (15) is provided with back leakage connection (1) and fuel inlet fitting (2), the upper end of cylinder body (15) is by oil cylinder loam cake (19) sealing, be provided with the cavity of a plurality of connections in the cylinder body (15), be equipped with piston (16) in each cavity, each piston (16) is all fixedlyed connected with force transmitting board (8) by adjusting screw rod (21).
2, piston type well-distributed pressure loader according to claim 1 is characterized in that: the bottom of described adjustment screw rod (21) is threaded with piston (16), and its top is passed oil cylinder loam cake (19) and fixedlyed connected with force transmitting board (8).
3, piston type well-distributed pressure loader according to claim 1 is characterized in that: described cylinder body (15) is an one-piece construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02213775 CN2532474Y (en) | 2002-04-05 | 2002-04-05 | Piston type uniform distributed pressure loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02213775 CN2532474Y (en) | 2002-04-05 | 2002-04-05 | Piston type uniform distributed pressure loader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2532474Y true CN2532474Y (en) | 2003-01-22 |
Family
ID=33693222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02213775 Expired - Fee Related CN2532474Y (en) | 2002-04-05 | 2002-04-05 | Piston type uniform distributed pressure loader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2532474Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012339A (en) * | 2010-12-15 | 2011-04-13 | 山东大学 | Ultra-thin flexible evenly distributed pressure loading device applicable to geomechanical model tests |
| CN102103055A (en) * | 2010-12-15 | 2011-06-22 | 山东大学 | Combined ultrathin flexible uniformly distributed pressure loading device for geomechanical model tests |
| CN102636386A (en) * | 2012-05-07 | 2012-08-15 | 中国科学院武汉岩土力学研究所 | Large-tonnage uniform distribution concentrated loading system |
| CN103226082A (en) * | 2013-04-15 | 2013-07-31 | 河海大学 | Test device simulating horizontal uniform load and test method |
| CN105547615A (en) * | 2016-01-30 | 2016-05-04 | 桂林电子科技大学 | Flameproof box hydraulic test device |
| CN105758714A (en) * | 2016-05-17 | 2016-07-13 | 重庆大学 | Stress loading device |
| CN107132124A (en) * | 2017-05-16 | 2017-09-05 | 宁波市交通建设工程试验检测中心有限公司 | A kind of pressure testing machine loading device |
-
2002
- 2002-04-05 CN CN 02213775 patent/CN2532474Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012339A (en) * | 2010-12-15 | 2011-04-13 | 山东大学 | Ultra-thin flexible evenly distributed pressure loading device applicable to geomechanical model tests |
| CN102103055A (en) * | 2010-12-15 | 2011-06-22 | 山东大学 | Combined ultrathin flexible uniformly distributed pressure loading device for geomechanical model tests |
| CN102103055B (en) * | 2010-12-15 | 2012-10-24 | 山东大学 | Combined ultrathin flexible uniformly distributed pressure loading device for geomechanical model tests |
| CN102636386A (en) * | 2012-05-07 | 2012-08-15 | 中国科学院武汉岩土力学研究所 | Large-tonnage uniform distribution concentrated loading system |
| CN103226082A (en) * | 2013-04-15 | 2013-07-31 | 河海大学 | Test device simulating horizontal uniform load and test method |
| CN103226082B (en) * | 2013-04-15 | 2015-09-30 | 河海大学 | A kind of test unit of dummy level evenly load and test method |
| CN105547615A (en) * | 2016-01-30 | 2016-05-04 | 桂林电子科技大学 | Flameproof box hydraulic test device |
| CN105758714A (en) * | 2016-05-17 | 2016-07-13 | 重庆大学 | Stress loading device |
| CN105758714B (en) * | 2016-05-17 | 2018-04-03 | 重庆大学 | A kind of stress loading device |
| CN107132124A (en) * | 2017-05-16 | 2017-09-05 | 宁波市交通建设工程试验检测中心有限公司 | A kind of pressure testing machine loading device |
| CN107132124B (en) * | 2017-05-16 | 2020-07-31 | 宁波市交通建设工程试验检测中心有限公司 | Loading device of pressure testing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |