CN211477894U - Experimental device for research hydrostatic pressure acts on rock - Google Patents
Experimental device for research hydrostatic pressure acts on rock Download PDFInfo
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- CN211477894U CN211477894U CN201922290116.4U CN201922290116U CN211477894U CN 211477894 U CN211477894 U CN 211477894U CN 201922290116 U CN201922290116 U CN 201922290116U CN 211477894 U CN211477894 U CN 211477894U
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Abstract
The utility model discloses an experimental device for researching hydrostatic pressure acting on rock, which comprises a frame barrel, a pressurizing outer barrel, a pressurizing inner barrel and a vacuum pump, wherein the pressurizing outer barrel is arranged on the inner side of the top of the frame barrel, the pressurizing inner barrel is arranged in the frame barrel, a piston is arranged in the pressurizing inner barrel, a piston rod is arranged at the central position of the top end of the piston, a plurality of ear-type handles are arranged at the top end of the pressurizing outer barrel, an annular piston is arranged at the bottom end of the pressurizing outer barrel, a first air duct is arranged on one side of the bottom of the frame barrel, the vacuum pump is connected onto the first air duct, and a pressurizing valve is arranged between the; and a pressure sensor is arranged at the top end of the piston and around the circumference outer side of the piston rod. Has the advantages that: simple structure reasonable in design, easy operation, the controllability is strong, has very important meaning to the research that simulation hydrostatic pressure acted on the rock.
Description
Technical Field
The utility model relates to a geotechnical engineering technical field particularly, relates to an experimental apparatus for research hydrostatic pressure acts on rock.
Background
The mechanical properties of the rock refer to the mechanical properties of elasticity, plasticity, elastoplasticity, rheological property, brittleness, toughness and the like of the rock under the action of stress. The stress-strain relationship, deformation condition or fracture condition and the like of rocks with different properties are different. Because the composition and structure of various rocks are different, the formed age is different, and a plurality of cracks are formed in the rocks, so that the mechanical properties of the rocks are greatly different, the small rocks and the large rocks and the rock blocks and the plots are also greatly different, and the properties are influenced by factors such as time, temperature, humidity, confining pressure, the mode of applying force, the history of speed and deformation, the surrounding medium where the rocks are located and the like.
How to research the mechanical properties of the rock by the hydraulic pressure of the rock is always a difficult problem in the industry, and because the hydraulic pressure required by the hydraulic pressure test of the rock is large and needs to be maintained for a long time, the large hydraulic pressure is difficult to achieve by using a conventional pressurizing mode and the pressure is high in cost for maintaining for a long time.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Not enough to prior art, the utility model provides a research hydrostatic pressure acts on the experimental apparatus of rock, possesses simple structure convenient operation's advantage, and then has solved the problem that traditional hydrostatic pressure acts on the experimental apparatus structure complicacy of rock.
(II) technical scheme
For realizing the advantage of above-mentioned simple structure convenient operation, the utility model discloses a specific technical scheme as follows:
an experimental device for researching hydrostatic pressure acting on rocks comprises a rack barrel, a pressurizing outer barrel, a pressurizing inner barrel and a vacuum pump, wherein the pressurizing outer barrel is arranged on the inner side of the top of the rack barrel, the pressurizing inner barrel is arranged inside the rack barrel, a piston is arranged in the pressurizing inner barrel, a piston rod is arranged at the center position of the top end of the piston, a plurality of ear type handles are arranged at the top end of the pressurizing outer barrel, an annular piston is arranged at the bottom end of the pressurizing outer barrel, a first air guide pipe is arranged on one side of the bottom of the rack barrel, the vacuum pump is connected onto the first air guide pipe, and a pressurizing valve is arranged between the vacuum pump and the rack barrel and positioned on the first air guide pipe; the top end of the piston is provided with a pressure sensor around the circumference outer side of the piston rod, the piston rod extends to the outer side of the pressurizing outer barrel and is in threaded connection with the pressurizing outer barrel through a bolt, and an air leakage preventing cushion is arranged between the bolt and the pressurizing outer barrel.
Furthermore, in order to enable the exhaust holes to exhaust the air in the open cavity, the air in the open cavity is prevented from being compressed to generate counter force when the pressurized outer barrel is pressurized, the experimental test result is prevented from being influenced, the barrel wall of the rack barrel is a double-layer barrel wall, the double-layer barrel wall forms the open cavity, and the exhaust holes are formed in the outermost barrel wall of the rack barrel.
Further, in order to be able to open the purpose that the decompression valve inhales air to reach decompression, the pressurization valve with be located between the frame bucket and be provided with the second air duct on the first air duct, be provided with the decompression valve on the second air duct.
Furthermore, in order to enable the annular piston to be elastically connected with the pressurizing outer barrel to play a buffering role, the annular piston is connected with the bottom end of the pressurizing outer barrel through an elastic connecting piece, and the annular piston is in sliding connection with the open cavity.
Furthermore, in order to enable the pressurizing outer barrel to drive the piston rod to enable the piston to be pressed down in the pressurizing barrel, the acting force of the piston is transmitted to water, so that hydrostatic pressure is applied to a rock sample, the pressurizing inner barrel is connected with the bottom plate of the rack barrel through bolt welding, and the inner space of the pressurizing inner barrel is a storage space for the rock sample and water.
Furthermore, in order to enable the vacuum pump to pump out air in a closed space formed by the pressurizing outer barrel and the rack barrel, so that an atmospheric pressure difference is formed, water pressure is applied to the rock sample after expansion, the first air duct penetrates through the barrel wall of the rack barrel and extends to the inside of the rack barrel, and one side, far away from the rack barrel, of the first air duct is communicated with the vacuum pump.
(III) advantageous effects
Compared with the prior art, the utility model provides an experimental apparatus for research hydrostatic pressure acts on rock possesses following beneficial effect:
(1) the utility model has the advantages of simple structure and reasonable design, easy operation, the controllability is strong, has very important meaning to the research that simulation hydrostatic pressure acted on the rock.
(2) The exhaust holes are matched with the open cavity, so that the exhaust holes can exhaust air in the open cavity, the air of the open cavity is compressed to generate counter force when pressurization of the pressurized outer barrel is avoided, an experiment test result is influenced, and the accuracy of experiment data is guaranteed.
(3) The piston rod is arranged to be matched with the piston and the pressurizing inner barrel, so that the pressurizing outer barrel drives the piston rod to enable the piston to be pressed down in the pressurizing barrel, the acting force of the piston is transferred to water, the hydrostatic pressure is applied to a rock sample, and the device is simple and convenient to operate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is one of schematic structural diagrams of an experimental device for studying hydrostatic pressure acting on rock according to an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of an experimental apparatus for studying hydrostatic pressure acting on rock according to an embodiment of the present invention;
fig. 3 is a flow chart of the experimental apparatus application method of studying hydrostatic pressure acts on rock according to the embodiment of the utility model.
In the figure:
1. a frame barrel; 2. a pressurized outer tub; 3. pressurizing the inner barrel; 4. a vacuum pump; 5. a piston; 6. a piston rod; 7. an ear-type handle; 8. an annular piston; 9. a first air duct; 10. a pressure valve; 11. a pressure sensor; 12. a bolt; 13. the air leakage prevention cushion; 14. an exhaust hole; 15. a second air duct; 16. a pressure reducing valve; 17. an open cavity.
Detailed Description
For further explanation of the embodiments, the drawings are provided as part of the disclosure and serve primarily to illustrate the embodiments and, together with the description, to explain the principles of operation of the embodiments, and to provide further explanation of the invention and advantages thereof, it will be understood by those skilled in the art that various other embodiments and advantages of the invention are possible, and that elements in the drawings are not to scale and that like reference numerals are generally used to designate like elements.
According to the utility model discloses an embodiment provides an experimental apparatus that research hydrostatic pressure acted on rock.
The invention will now be further described with reference to the accompanying drawings and specific embodiments, as shown in figures 1-2, the experimental device for researching the hydrostatic pressure acting on the rock according to the embodiment of the utility model comprises a frame barrel 1, a pressurizing outer barrel 2, a pressurizing inner barrel 3 and a vacuum pump 4, the pressurizing outer barrel 2 is arranged on the inner side of the top of the frame barrel 1, the pressurizing inner barrel 3 is arranged in the frame barrel 1, a piston 5 is arranged in the pressurizing inner barrel 3, a piston rod 6 is arranged at the center position of the top end of the piston 5, a plurality of ear-type handles 7 are arranged at the top end of the pressurizing outer barrel 2, the bottom end of the pressurizing outer barrel 2 is provided with an annular piston 8, one side of the bottom of the frame barrel 1 is provided with a first air duct 9, the vacuum pump 4 is connected to the first air duct 9, and a pressurizing valve 10 is arranged between the vacuum pump 4 and the frame barrel 1 and on the first air duct 9; a pressure sensor 11 is arranged at the top end of the piston 5 and around the circumference outer side of the piston rod 6, the piston rod 6 extends to the outer side of the pressurizing outer barrel 2 and is in threaded connection with the pressurizing outer barrel 2 through a bolt 12, and an air leakage preventing cushion 13 is arranged between the bolt 12 and the pressurizing outer barrel 2.
By means of the scheme, the hydraulic rock simulation device is reasonable in structural design, simple to operate, high in controllability and very important in simulating research of hydrostatic pressure acting on rocks.
In one embodiment, the barrel wall of the rack barrel 1 is a double-layer barrel wall, the double-layer barrel wall forms an open cavity 17, and the outermost barrel wall of the rack barrel 1 is provided with the exhaust hole 14, so that the exhaust hole 14 can exhaust air in the open cavity 17, and further, the phenomenon that the air in the open cavity 17 is compressed to generate a counter force when the pressurized outer barrel 2 is pressurized, and the experimental test result is influenced is avoided.
In one embodiment, a second air duct 15 is disposed between the pressure valve 10 and the rack barrel 1 and on the first air duct 9, and a pressure reducing valve 16 is disposed on the second air duct 15, so that when the vacuum pump 4 is started to pressurize the pressurized outer barrel 2, and the pressurization is excessive or a pressure reduction test is required, the pressure reducing valve 16 can be opened to suck air to achieve the purpose of reducing pressure.
In one embodiment, the annular piston 8 is connected to the bottom end of the pressurized outer barrel 2 through an elastic connection member, and the annular piston 8 is slidably connected to the open cavity 17, so that the elastic connection between the annular piston 8 and the pressurized outer barrel 2 plays a role of buffering.
In one embodiment, the pressurizing inner barrel 3 is connected with the bottom plate of the rack barrel 1 through bolt welding, the inner space of the pressurizing inner barrel 3 is a storage space for rock samples and water, the pressurizing outer barrel 2 drives the piston rod 6 to press the piston 5 in the pressurizing inner barrel 3, the acting force of the piston 5 is transmitted to water, and the hydrostatic pressure is applied to the rock samples.
In one embodiment, the first air duct 9 penetrates through the wall of the rack barrel 1 and extends to the inside of the rack barrel 1, and one side of the first air duct 9, which is far away from the rack barrel 1, is communicated with the vacuum pump 4, so that the vacuum pump 4 can pump out air in a closed space formed by the pressurized outer barrel 2 and the rack barrel 1, and further atmospheric pressure difference is formed, and water pressure is applied to a rock sample after expansion.
The working principle is as follows: air in a closed space formed by the pressurizing outer barrel 2 and the rack barrel 1 is pumped out by arranging the vacuum pump 4 so as to achieve the purpose that the pressure difference exists between the inside and the outside of the pressurizing outer barrel 2, the pressure difference is amplified and then transmitted to water in the pressurizing inner barrel 3 through the matching of the piston rod 6 and the piston 5, and then the hydrostatic pressure is acted on a rock sample.
For the convenience of understanding the above technical solution of the present invention, the following detailed description is made in conjunction with the process flow, specifically as follows:
as shown in fig. 3, according to the embodiment of the invention, a use method of the test device for studying the effect of hydrostatic pressure on the rock is also provided.
The method comprises the following steps:
step S1: manufacturing a rock sample;
step S2: loosening the connecting bolt 12, removing the pressurizing outer barrel 2, the piston rod 6 and the piston 5, putting a rock sample into the pressurizing inner barrel 3, adding water until the rock sample is submerged, reloading the piston 5, the piston rod 6 and the pressurizing outer barrel 2, and tightening the bolt 12;
step S3: starting the vacuum pump 4, gradually pumping out air between the rack barrel 1 and the pressurizing inner barrel 3, generating atmospheric pressure difference between the inside and the outside of the pressurizing outer barrel 2, further applying pressure to the top end of the pressurizing outer barrel 2, transmitting the pressure to the water in the pressurizing inner barrel 3 after the pressure is amplified by tens of times through the piston rod 6 and the piston 5, and enabling the water to generate water pressure to act on the rock sample;
step S4: and observing the pressure value collected by the pressure sensor 11, closing the pressurizing valve 10 when the pressure reaches the pressure required by the test, and closing the vacuum pump 4 at the same time, wherein the pressure is maintained unchanged, so that the hydrostatic pressure is applied to the rock sample.
To sum up, with the help of the above technical scheme of the utility model, through setting up exhaust hole 14 with uncovered cavity 17 cooperatees, thereby makes exhaust hole 14 can with air escape in the uncovered cavity 17, and then avoided when the outer bucket 2 of pressurization is pressurized the air of uncovered cavity 17 is compressed and produces the counter-force, influences the experiment test result, has guaranteed the accuracy nature of experimental data. By arranging the piston rod 6 to be matched with the piston 5 and the pressurizing inner barrel 3, the pressurizing outer barrel 2 drives the piston rod 6 to press the piston 5 in the pressurizing inner barrel 3, the acting force of the piston 5 is transferred to water, the hydrostatic pressure is acted on a rock sample, and the device is simple and convenient to operate. Therefore, the device has the advantages of reasonable structural design, simplicity in operation and strong controllability, and has very important significance for simulating the research that hydrostatic pressure acts on rocks.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The experimental device for researching hydrostatic pressure acting on rock is characterized by comprising a rack barrel (1), a pressurizing outer barrel (2), a pressurizing inner barrel (3) and a vacuum pump (4), wherein the pressurizing outer barrel (2) is arranged on the inner side of the top of the rack barrel (1), the pressurizing inner barrel (3) is arranged inside the rack barrel (1), a piston (5) is arranged in the pressurizing inner barrel (3), a piston rod (6) is arranged at the center of the top end of the piston (5), a plurality of ear type handles (7) are arranged at the top end of the pressurizing outer barrel (2), an annular piston (8) is arranged at the bottom end of the pressurizing outer barrel (2), a first air guide pipe (9) is arranged on one side of the bottom of the rack barrel (1), the vacuum pump (4) is connected onto the first air guide pipe (9), and a pressurizing valve (9) is arranged between the vacuum pump (4) and the rack barrel (1) and positioned on the first air guide pipe (9 10) (ii) a
The pressure sensor (11) is arranged at the top end of the piston (5) and around the circumference outer side of the piston rod (6), the piston rod (6) extends to the outer side of the pressurizing outer barrel (2) and is in threaded connection with the pressurizing outer barrel (2) through a bolt (12), and an air leakage preventing cushion (13) is arranged between the bolt (12) and the pressurizing outer barrel (2).
2. The experimental device for researching hydrostatic pressure acting on rock according to claim 1, wherein the barrel wall of the rack barrel (1) is a double-layer barrel wall, the double-layer barrel wall forms an open cavity (17), and an exhaust hole (14) is formed in the outermost barrel wall of the rack barrel (1).
3. The experimental device for researching hydrostatic pressure acting on rocks according to claim 1, wherein a second air duct (15) is arranged between the pressurizing valve (10) and the rack barrel (1) and on the first air duct (9), and a pressure reducing valve (16) is arranged on the second air duct (15).
4. The experimental device for studying the hydrostatic pressure on the rock as claimed in claim 2, wherein the annular piston (8) is connected with the bottom end of the pressurizing outer barrel (2) through an elastic connecting piece, and the annular piston (8) is connected with the open cavity (17) in a sliding manner.
5. The experimental device for researching hydrostatic pressure on rocks as claimed in claim 1, wherein the inner pressurized barrel (3) is connected with the bottom plate of the rack barrel (1) through bolt welding, and the inner space of the inner pressurized barrel (3) is a rock sample and water storage space.
6. The experimental device for studying the hydrostatic pressure on the rock as claimed in claim 1, wherein the first air duct (9) penetrates through the barrel wall of the rack barrel (1) and extends to the inside of the rack barrel (1), and one side of the first air duct (9) far away from the rack barrel (1) is communicated with the vacuum pump (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922290116.4U CN211477894U (en) | 2019-12-19 | 2019-12-19 | Experimental device for research hydrostatic pressure acts on rock |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922290116.4U CN211477894U (en) | 2019-12-19 | 2019-12-19 | Experimental device for research hydrostatic pressure acts on rock |
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| CN211477894U true CN211477894U (en) | 2020-09-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111965039A (en) * | 2020-08-25 | 2020-11-20 | 贵州大学 | Experimental device for research moves/hydrostatic pressure to rock mechanical properties's influence |
| CN115266387A (en) * | 2022-09-27 | 2022-11-01 | 太原理工大学 | Mechanics experiment method and device for realizing negative stress triaxial degree through isostatic loading |
-
2019
- 2019-12-19 CN CN201922290116.4U patent/CN211477894U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111965039A (en) * | 2020-08-25 | 2020-11-20 | 贵州大学 | Experimental device for research moves/hydrostatic pressure to rock mechanical properties's influence |
| CN115266387A (en) * | 2022-09-27 | 2022-11-01 | 太原理工大学 | Mechanics experiment method and device for realizing negative stress triaxial degree through isostatic loading |
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