CN108507880B - Full-hydraulic three-cavity type lateral pressure instrument probe - Google Patents
Full-hydraulic three-cavity type lateral pressure instrument probe Download PDFInfo
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- CN108507880B CN108507880B CN201810350850.2A CN201810350850A CN108507880B CN 108507880 B CN108507880 B CN 108507880B CN 201810350850 A CN201810350850 A CN 201810350850A CN 108507880 B CN108507880 B CN 108507880B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention relates to a full-hydraulic three-cavity type lateral pressure instrument probe, which comprises a shell, wherein a central pipe coaxial with the shell is arranged at the center of the shell, the central pipe is fixedly connected with the shell through a plurality of parallel fastening rings, an upper protection cavity, a measurement cavity and a lower protection cavity are sequentially arranged on the outer wall of the central pipe below the lowest fastening ring from top to bottom, a two-position three-way electromagnetic valve is arranged on the central pipe, the upper end of the two-position three-way electromagnetic valve is communicated with a water inlet pipe, the lower end of the two-position three-way electromagnetic valve is communicated with a first branch pipeline and a second branch pipeline, the first branch pipeline is communicated with the upper protection cavity and the lower protection cavity, the second branch pipeline is communicated with the measurement cavity, the pressure application to the protection cavity and the measurement cavity is simultaneously realized through one water inlet pipe, the random switching of the first branch pipeline and the second branch pipeline can be realized through the two-position three-way electromagnetic valve, the operation is convenient and the effect is good, the cost is reduced, and the working efficiency and the working strength are improved.
Description
Technical Field
The invention relates to the technical field of rock and soil material testing instruments, in particular to a full-hydraulic three-cavity type lateral pressure instrument probe.
Background
With the acceleration of infrastructure construction and urbanization development in China, a plurality of large projects and high-rise buildings are increasing day by day, and the investigation work of providing accurate and reliable foundation geotechnical mechanical parameters becomes very important. The lateral pressure test is an in-situ horizontal load test and adopts the principle that an expandable circular lateral pressure device is utilized in a drill hole to pressurize the drill hole in a vertical drill hole, and the soil body (soft rock) on the hole wall is deformed through the expansion of the lateral pressure device, so that the stress-strain characteristic of the soil body (soft rock) is determined. At present, the research on the probe of the lateral pressure instrument and the use aspect is systematic at home and abroad, but the probe has the following defects:
(1) The single-chamber lateral pressure instrument probe has low precision and limited application range. As shown in fig. 4, appropriate pressure may cause a more uniform deformation of the manometers outer membrane; however, when the pressure is high, two ends of the single-cavity pressure bypass device extend outwards to cause the deformation of the cavity volume, so that real volume change cannot be obtained, and the phenomenon becomes more serious along with the increase of the hardness of the soil layer, so that certain errors are brought to the calculation of data such as the modulus, the yield pressure, the ultimate pressure and the like of the rock-soil body.
(2) At present, a more common three-cavity type lateral pressure instrument probe is shown in fig. 5, a double-tube pressurization system is generally adopted, as shown in fig. 3, the probe comprises an upper protection cavity, a measurement cavity and a lower protection cavity, the upper protection cavity and the lower protection cavity are filled with water at first to apply water pressure when a test is started, then the measurement cavity in the middle is filled with water and applied with water pressure, the upper protection cavity and the lower protection cavity can play a role in coordinated deformation, and the condition that the volume of a cavity is distorted due to the fact that two ends of a lateral pressure instrument outer membrane extend outwards in the test process of the single-cavity type lateral pressure instrument probe is relieved. However, the method has the disadvantages of complex device, complex operation and high cost, and wastes time and labor when being used in an actual exploration field.
Disclosure of Invention
In view of the above, the invention discloses a full-hydraulic three-cavity type lateral pressure instrument probe which can greatly simplify the test operation, reduce the test cost and improve the working efficiency and the working strength of on-site foundation rock-soil physical mechanical parameter investigation.
The invention provides a full hydraulic three-cavity type lateral pressure instrument probe, which comprises a shell, wherein a central tube coaxial with the shell is arranged at the center of the shell, the central tube is fixedly connected with the shell through a plurality of parallel fastening rings, the bottom of the central tube is sealed, an upper protection cavity, a measurement cavity and a lower protection cavity are sequentially arranged on the outer wall of the central tube below the fastening ring at the lowest part from top to bottom, a two-position three-way electromagnetic valve is arranged on the central tube, the two-position three-way electromagnetic valve comprises a water inlet end at the upper end and two water outlet ends at the lower end, the water inlet end is communicated with a water inlet tube, the two water outlet ends are respectively communicated with a first branch pipeline and a second branch pipeline, the first branch pipeline is communicated with the upper protection cavity and the lower protection cavity, and the second branch pipeline is communicated with the measurement cavity.
Furtherly, two three way solenoid valve include a valve body, this internal airtight chamber that is equipped with of valve, airtight chamber top is equipped with and runs through the water inlet of valve body, fixed mounting has in the water inlet the inlet tube, airtight chamber bottom symmetry is equipped with and runs through the first export and the second export of valve body, fixed mounting has in the first export first branch pipeline, fixed mounting has in the second export second branch pipeline, airtight intracavity is equipped with a pilot valve, the pilot valve can remove about airtight intracavity, realize first branch pipeline with second branch pipeline with the switching of inlet tube switches on.
Further, the pilot valve includes coil, pivot, piston and spring, the coil is vertical to be arranged in the valve body, the coil direction is relative be equipped with a horizontally recess in the valve body lateral wall, pivot one end level is passed the valve body inside wall goes into through the movably installation of spring in the coil, the pivot other end crosses sealed chamber movably install in the recess, a signal control line one end electricity is connected the coil, the other end passes the valve body electricity is connected with the controller, install in the pivot the piston, work as when the coil gets electricity, the pivot atress is overcome spring force removes to the coil direction, drives the piston closes second branch pipeline opens simultaneously first branch pipeline, works as when the coil does not get electricity, spring force promotes the pivot removes to the recess direction, drives the piston closes first branch pipeline opens simultaneously the second branch pipeline.
Furthermore, the closed cavity comprises a water inlet cavity positioned above and a mixing cavity positioned below, the longitudinal section of the mixing cavity is the same as that of the piston, and the cross-sectional area of the piston is larger than that of the first branch pipeline or the second branch pipeline.
Furthermore, two three way solenoid valve are cylindrical, two three way solenoid valve's diameter is 45 ± 0.5mm, and length is 90mm, the diameter of inlet tube is 2.5mm.
The technical scheme provided by the invention has the beneficial effects that:
1. adopt two pipelines of admitting air and intaking that an inlet tube replaced current side pressure appearance probe, need not plus air pressure control system promptly, only realize exerting the pressure in protection chamber and measurement chamber simultaneously with a water pressure control system, the structure is simpler, the cost is lower and the practicality is stronger.
2. Two tee bend solenoid valves are used in the middle of inlet tube and two branch outlet pipes and link to each other, realize the random switching of first branch pipeline and second branch pipeline, it is more convenient that the operation is got up, protection chamber and lower protection chamber on the first branch pipeline intercommunication, second branch pipeline intercommunication test chamber, control coil electrification and power loss through the controller, just can be respectively to the water-filling of last protection chamber and lower protection chamber and test chamber and exert pressure, the simple operation and respond well, greatly simplified test operation, the test cost is reduced, the work efficiency and the working strength of on-the-spot ground physics mechanical parameter reconnaissance have been promoted.
Drawings
FIG. 1 is a schematic structural diagram of a full hydraulic three-cavity type lateral pressure instrument probe of the invention;
FIG. 2 is a cross-sectional view of a two-position, three-way solenoid valve of the present invention;
FIG. 3 is a block diagram of a dual tube pressurization system of a prior art bypass manometer;
FIG. 4 is a state diagram of a single chamber pressure bypass gauge probe of the prior art at different pressures;
FIG. 5 is a block diagram of a prior art triple chamber lateral manometer probe.
In the figure:
1. the device comprises a shell 2, a central pipe 3, a fastening ring 4, an upper protection cavity 5, a measurement cavity 6, a lower protection cavity 7, a two-position three-way electromagnetic valve 71, a valve body 72, a closed cavity 73, a water inlet 74, a first outlet 75, a second outlet 8, a water inlet pipe 9, a first branch pipeline 10, a second branch pipeline 11, a pilot valve 111, a coil 112, a rotating shaft 113, a piston 114, a spring 12, a groove 13 and a control signal line.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 and fig. 2, an embodiment of the present invention discloses a full hydraulic three-cavity type lateral pressure instrument probe, which includes a housing 1, a central tube 2 coaxial with the housing 1 is disposed at the center of the housing 1, the central tube 2 is fixedly connected to the housing 1 through a plurality of parallel fastening rings 3, and the bottom of the central tube 2 is sealed, so that impurities, such as water, soil, or quicksand, do not flow into the central tube 2, and the probe is not affected by the external environment when in use. In this embodiment the tighrening ring 3 is two of parallel arrangement, is located the below the tighrening ring 3 the outer wall of center tube 2 is from last to being equipped with one down in proper order and protects chamber 4, one and measure chamber 5 and protect chamber 6 once, be equipped with a two-position three solenoid valve 7 on the center tube 2, two three solenoid valve 7 be cylindrical, very light install in on the center tube 2, two three solenoid valve 7 are located two in the middle of the tighrening ring 3 center tube 2 position, two three solenoid valve 7 include a valve body 71, be equipped with a sealed chamber 72 in the valve body 71, sealed chamber 72 is including the intake antrum that is located the top and the hybrid chamber that is located the below, the sealed chamber top is equipped with and runs through the water inlet 73 of valve body 71, a water inlet 73 internal fixation installation inlet tube 8 in the water inlet 73, sealed chamber 72 bottom symmetry is equipped with and runs through first export 74 and the second export 75 of valve body 71, first export 9 internal fixation installation first branch pipeline 9 in the first export 74, second export 75 internal fixation installation second branch pipeline 10, the other end respectively with last protection chamber 4 with the protection chamber 6 and the second branch pipeline communicates with the first branch pipeline 10 that gets into, the selective branch pipeline that the inlet pipe 10 gets into, the last branch pipeline that gets through after the measurement.
The diameter of two three-way solenoid valve 7 can adopt 45 ± 0.5mm, and the height is 90mm, the diameter of inlet tube 8 is 2.5mm, first export 74 with second export 75 is located respectively two three-way solenoid valve 7 bottoms.
The closed cavity 72 is internally provided with a pilot valve 11, the pilot valve 11 can move left and right in the closed cavity 72 to realize the switching conduction of the first branch pipeline 9 and the second branch pipeline 10 with the water inlet pipe 8, the pilot valve 11 comprises a coil 111, a rotating shaft 112, a piston 113 and a spring 114, the coil 111 is vertically arranged in the side wall of the valve body 71, the opposite direction of the coil 111 is provided with a horizontal groove 12 in the side wall of the valve body 71, one end of the rotating shaft 112 horizontally penetrates through the inner wall of the valve body 71 and is movably arranged in the coil 111 through the spring 114, the other end of the rotating shaft 112 transversely penetrates through the closed cavity 72 and is movably arranged in the groove 12, the groove 12 is matched with the rotating shaft 112, the diameter of the groove 12 is slightly larger than that of the rotating shaft 112, therefore, the rotating shaft 112 can move in the groove 12 along the axis direction, one end of a signal control line 13 is electrically connected with the coil 111, the other end of the signal control line passes through the valve body 71 and is electrically connected with a controller, the power on and power off of the coil 111 are controlled by the controller, so that the movement of the rotating shaft 112 in the axis direction is realized, two pistons 113 are arranged on the rotating shaft 112 in parallel, the longitudinal section of the mixing cavity is the same as that of the pistons 113, the cross section area of the pistons 113 is larger than that of the first branch pipeline 9 or the second branch pipeline 10, when the controller controls the power on of the coil 111, the rotating shaft 112 is stressed to overcome the elastic force of the spring 114 to move towards the coil 111, so as to drive the pistons 113 to fill the mixing cavity in the direction of the coil 111 and completely close the second branch pipeline 10, and simultaneously open the first branch pipeline 9, so that the water inlet pipe 8 is communicated with the first branch pipeline 9, the water can be filled into the upper protection cavity 4 and the lower protection cavity 6 and the pressure is applied, when a certain pressure is reached, the controller controls the coil 111 to lose power, the spring 114 pushes the rotating shaft 112 to move towards the groove 12 through the elasticity of the spring 114, the piston 113 is driven to fill the mixing cavity in the opposite direction of the coil 111 and completely close the first branch pipeline 9, meanwhile, the second branch pipeline 10 is opened, the water inlet pipe 8 is communicated with the second branch pipeline 10, the water pressure can be applied to the test cavity 5 to reach a certain pressure value, after a pressure cycle is measured, the coil 111 is controlled to be powered through the controller again, the water pressure is applied to the upper protection cavity 4 and the lower protection cavity 6, the coil 111 is controlled to lose power through the controller again after a target pressure value is reached, and the rest on the same, and tests of different pressure cycles are realized.
The two pipelines of air inlet and water inlet of the existing bypass pressure instrument probe are replaced by one water inlet pipe 8, and the pressure application to the upper protection cavity 4, the lower protection cavity 6 and the measurement cavity 5 can be realized simultaneously by one water pressure control system by means of the dual-purpose three-way electromagnetic valve 7, so that the test operation is greatly simplified, the test cost is reduced, and the working efficiency and the working strength of the on-site foundation rock-soil physical mechanical parameter investigation are improved.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
The embodiments and features of the embodiments described herein above may be combined with each other without conflict. The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (3)
1. The utility model provides a full-hydraulic three-chamber type lateral pressure appearance probe, includes the casing, casing center department be equipped with one with the coaxial center tube of casing, the center tube through a plurality of parallel tighrening rings with casing fixed connection, its characterized in that:
the bottom of the central tube is sealed, an upper protection cavity, a measurement cavity and a lower protection cavity are sequentially arranged on the outer wall of the central tube below the fastening ring at the lowest position from top to bottom, a two-position three-way electromagnetic valve is arranged on the central tube and comprises a water inlet end at the upper end and two water outlet ends at the lower end, the water inlet end is communicated with a water inlet tube, the two water outlet ends are respectively communicated with a first branch pipeline and a second branch pipeline, the first branch pipeline is communicated with the upper protection cavity and the lower protection cavity, and the second branch pipeline is communicated with the measurement cavity;
the two-position three-way electromagnetic valve comprises a valve body, wherein a closed cavity is arranged in the valve body, a water inlet penetrating through the valve body is formed in the top of the closed cavity, the water inlet pipe is fixedly installed in the water inlet, a first outlet and a second outlet penetrating through the valve body are symmetrically formed in the bottom of the closed cavity, the first branch pipeline is fixedly installed in the first outlet, the second branch pipeline is fixedly installed in the second outlet, a pilot valve is arranged in the closed cavity, the pilot valve can move left and right in the closed cavity, and switching conduction of the first branch pipeline and the second branch pipeline with the water inlet pipe is achieved;
the pilot valve comprises a coil, a rotating shaft, a piston and a spring, wherein the coil is vertically arranged in the valve body, a horizontal groove is formed in the side wall of the valve body, which is opposite to the coil in direction, one end of the rotating shaft horizontally penetrates through the inner side wall of the valve body and is movably installed in the coil through the spring, the other end of the rotating shaft transversely penetrates through the sealed cavity and is movably installed in the groove, one end of a signal control line is electrically connected with the coil, the other end of the signal control line penetrates through the valve body and is electrically connected with a controller, the piston is installed on the rotating shaft, when the coil is electrified, the rotating shaft is stressed to overcome the elastic force of the spring and moves towards the coil direction, the piston is driven to close the second branch pipeline, and meanwhile, the first branch pipeline is opened, and when the coil is not electrified, the elastic force of the spring pushes the rotating shaft to move towards the groove direction, the piston is driven to close the first branch pipeline, and meanwhile, the second branch pipeline is opened;
the closed cavity comprises a water inlet cavity positioned above and a mixing cavity positioned below, the longitudinal section of the mixing cavity is the same as that of the piston, and the cross-sectional area of the piston is larger than that of the first branch pipeline or the second branch pipeline.
2. The full hydraulic three-cavity lateral pressure instrument probe of claim 1, wherein: the two-position three-way electromagnetic valve is cylindrical.
3. The full hydraulic three-cavity lateral pressure instrument probe according to claim 2, wherein: the diameter of two three solenoid valves is 45 +/-0.5 mm, and length is 90mm, the diameter of inlet tube is 2.5mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810350850.2A CN108507880B (en) | 2018-04-18 | 2018-04-18 | Full-hydraulic three-cavity type lateral pressure instrument probe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810350850.2A CN108507880B (en) | 2018-04-18 | 2018-04-18 | Full-hydraulic three-cavity type lateral pressure instrument probe |
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| CN108507880A CN108507880A (en) | 2018-09-07 |
| CN108507880B true CN108507880B (en) | 2023-03-28 |
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| CN109799144B (en) * | 2019-03-08 | 2022-09-02 | 曹增国 | Rock-soil layer in-situ lateral pressure testing device and method |
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| CN101280682A (en) * | 2008-05-30 | 2008-10-08 | 陈奇 | Complete hydraulic self-drilling type side pressure equipment |
| CN102494853A (en) * | 2011-11-25 | 2012-06-13 | 上海大学 | Packer high temperature high pressure hydraulic continuous pressurization test device |
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| CN203614839U (en) * | 2013-12-05 | 2014-05-28 | 吴忠仪表有限责任公司 | Automatic pressure measurement three-way reversing valve |
| CN105041780A (en) * | 2015-06-24 | 2015-11-11 | 上海大学 | Hydraulic test system device for down-hole packer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8825430B2 (en) * | 2008-11-03 | 2014-09-02 | Ann E. Mulligan | Differential pressure systems and methods for measuring hydraulic parameters across surface water-aquifer interfaces |
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2018
- 2018-04-18 CN CN201810350850.2A patent/CN108507880B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201037556Y (en) * | 2007-02-01 | 2008-03-19 | 武汉广远经济发展有限责任公司 | Self-acting two-position three-way magnetic valve for large heavy caliber |
| CN101280682A (en) * | 2008-05-30 | 2008-10-08 | 陈奇 | Complete hydraulic self-drilling type side pressure equipment |
| CN102494853A (en) * | 2011-11-25 | 2012-06-13 | 上海大学 | Packer high temperature high pressure hydraulic continuous pressurization test device |
| CN103016007A (en) * | 2012-12-05 | 2013-04-03 | 山东科技大学 | Electronically controlled single-loop water-plugging overburden strata fracture detection method |
| CN203572747U (en) * | 2013-10-16 | 2014-04-30 | 中水东北勘测设计研究有限责任公司 | Hydraulic-pressure-type high-pressure pressurized water tester with double plugs |
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