CN109540680B - Quick saturator of miniature tensiometer - Google Patents
Quick saturator of miniature tensiometer Download PDFInfo
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- CN109540680B CN109540680B CN201811485810.5A CN201811485810A CN109540680B CN 109540680 B CN109540680 B CN 109540680B CN 201811485810 A CN201811485810 A CN 201811485810A CN 109540680 B CN109540680 B CN 109540680B
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- 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
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Abstract
The invention discloses a rapid saturator of a miniature tension meter, which comprises a vacuum-pumping system, a saturation system and a water storage system. The invention respectively fixes a micro tension meter sensor and a clay pipe on mounting holes of a sensor saturation ring and the clay pipe. In the process of vacuumizing, bubbles in the sensor can be discharged through the vibration effect of the wireless vibration exciter, so that the saturation degree of the sensor is effectively improved, and in addition, the degassing water is gradually injected into the water storage chamber of the argil head and gradually saturates the argil head under the action of atmospheric pressure. The test device has simple and convenient operation procedure, can quickly and synchronously saturate the sensor and the argil head, has good saturation effect, can shorten the reaction time of the tensiometer for measuring the substrate suction force, and can delay the cavitation time of the argil head with high air intake value, thereby improving the capability of the high air intake value micro tensiometer for measuring the substrate suction force exceeding 85 kPa.
Description
Technical Field
The invention relates to a quick saturator device of a miniature tension meter. The device can effectively saturate a plurality of micro tensiometers, has high saturation degree, and can effectively improve the capability of the micro tensiometer with a high air intake value for measuring the substrate suction force exceeding 85 kPa.
Background
Seepage analysis, shear strength, volume change and settlement calculation of unsaturated soil are closely related to matrix suction, so that the matrix suction is the basis of an unsaturated soil mechanical theory system and has important significance for explaining mechanical properties of unsaturated soil. There are many methods for measuring the substrate suction force, but compared with other methods, the micro tensiometer is not only convenient to carry, but also has a short reaction time for substrate suction force balance, so that the application in field, indoor and model tests is becoming more and more extensive. In addition, with the advancement of tensiometer technology, high air intake value micro tensiometers have been developed which can measure substrate suction in excess of 85kPa, but have higher requirements for saturation of the clay head and sensor than general micro tensiometers, which makes it difficult to meet the saturation requirements of high air intake value micro tensiometers by using the injector saturation method of using an injector to separately pump the micro tensiometer sensor and the clay head. The use of conventional saturation at the same time has the following disadvantages:
1. the saturation effect of the micro tensiometer is difficult to control. The saturation degree of the traditional injector saturation method is difficult to control, the problem of low saturation degree often exists, the reaction time for measuring the substrate suction force is prolonged, and cavitation is generated in advance in a high air inlet value pottery clay head, so that the capability of a high air inlet value micro tension meter for measuring the substrate suction force exceeding 85kPa is reduced.
2. The saturation efficiency of the micro tensiometer is low. The traditional injector method saturation method can only saturate a single branch for several times, and can not saturate a plurality of tensiometers at the same time, and if a micro tensiometer with more saturation needs, a great amount of time is consumed.
3. The operability of the saturation process of the micro tensiometer is poor. The traditional injector saturation method needs to saturate a tension meter sensor and a clay head respectively, and needs to knock the sensor manually to discharge air in the sensor in the saturation process, so that the operation is inconvenient.
Disclosure of Invention
In order to solve the defects, the invention provides the rapid saturator device for the miniature tensiometer, the device can effectively saturate a plurality of miniature tensiometers, the saturation degree of the sensor and the argil head is high, and the capability of the miniature tensiometer with a high air intake value for measuring the substrate suction force exceeding 85kPa can be effectively improved.
In order to achieve the purpose, the invention designs a vacuum-pumping system, a saturation system and a water storage system.
The saturation system comprises a sensor saturation chamber, a wire storage chamber and a clay pipe protection chamber. The sensor saturation chamber is provided with a wireless vibration exciter, and the sensor is fixed with the O-shaped sealing ring through a sensor saturation ring and injects the deaerated water into the sensor saturation chamber. The clay pipe needs to pass through the inverted rubber plug and be fixed on the mounting hole of the clay pipe. After the installation is finished, the sensor and the argil head can be saturated by vacuumizing, injecting water and starting the wireless vibration exciter.
The vacuum pumping system comprises a vacuum pump, a vacuum meter and an air pumping guide pipe. One end of the air exhaust conduit is connected with the vacuum pump, and the other end is connected with the top cover of the vacuum barrel.
The saturation system comprises a sensor saturation chamber, a wire storage chamber and a clay pipe protection chamber. The sensor saturation chamber provides a separate space for sensor saturation. The wire storage chamber is convenient for placing sensor connecting wires. The pottery clay pipe protection chamber can block the influence of the sensor connecting wires on the pottery clay pipes in the processes of vacuumizing and vibrating.
The water storage system comprises a water storage bottle and a water storage chamber, the water storage bottle is connected with the water storage chamber through a drainage guide pipe and a valve, and water is supplied to the water storage chamber from the water storage bottle.
The bottom plate of the vacuum barrel is provided with clay head mounting holes.
A rubber gasket is arranged between the top cover and the vacuum barrel and is used for sealing the vacuum barrel.
The top cover is provided with a vacuum meter for monitoring the vacuum degree of the saturation system.
The sensor is fixed through a sensor saturation ring.
The sensor saturation chamber is provided with a wireless vibration exciter, so that the bottom plate of the sensor saturation chamber can vibrate to discharge bubbles in the sensor.
And a wireless vibration exciter power supply is fixed on the inner wall of the wire storage chamber.
The wire storage chamber is provided with a spring for enhancing the vibration of the bottom plate of the sensor saturation chamber.
The clay pipe penetrates through the inverted rubber plug and is fixed on the clay pipe mounting hole.
A sponge cushion layer is paved on the bottom plate of the water storage chamber and is used for protecting the clay head.
The water storage chamber is connected with a valve which is used as an air vent between the water storage chamber and the outside.
A flange is arranged between the argil pipe protection chamber and the water storage chamber and used for connecting and fixing the saturation system and the water storage system, and the carrying is convenient.
Compared with the prior art, the invention has the following advantages:
1. the saturation effect of the micro tensiometer is easy to control. The sensor can effectively discharge bubbles in the sensor under the vibration action of the wireless vibration exciter, and the degassing water can effectively fill pore passages of the argil head, so that the reaction time of the tensiometer for measuring the substrate suction is shortened, and the cavitation time generated in the argil head with the high air intake value is delayed, thereby improving the capability of the high air intake value micro tensiometer for measuring the substrate suction exceeding 85 kPa.
2. The saturation efficiency of the micro tensiometer is improved. The number of single saturation tensiometers increases and the saturation time is shortened.
3. The operability of the saturation process of the micro tensiometer is enhanced. The operation process is simple and convenient as the pottery clay pipe penetrates through the inverted rubber plug and is fixed on the pottery clay pipe mounting hole, the sensor is fixed in the sensor saturation ring, the sensor saturation ring is used for storing water, and the wireless vibration exciter is vacuumized, injected with water and started.
Drawings
Fig. 1 is a schematic structural view of a rapid saturator of a micro-tensiometer provided by the invention.
In the figure, 1-a vacuum pumping system, 2-a saturation system, 3-a water storage system, 4-a top cover, 4-1 a rubber gasket, 5-a vacuum pump, 6-an exhaust duct, 7-a valve, 8-a vacuum meter, 9-a sensor saturation chamber, 9-1-a wireless vibration exciter, 9-2-a sensor saturation ring, 9-3-a sensor, 9-4-an O-shaped sealing ring, 9-5-a sensor saturation chamber bottom plate, 9-6-a wireless vibration exciter power supply, 10-a wire storage chamber, 10-1-a wire storage chamber bottom plate, 10-2-a wire storage chamber supporting clapboard, 10-3 springs, 10-4 supporting clapboards, 10-5 air guide holes, 11-a clay pipe protection chamber and 11-1-a clay pipe installation hole, 11-2 parts of pottery clay pipes, 11-3 parts of perforated rubber plugs, 11-4 parts of pottery clay heads, 12 parts of water storage chambers, 12-1 parts of sponge cushion layers, 12-2 parts of valves, 13 parts of supports, 14 parts of water storage bottles, 15 parts of drainage guide pipes, 16 parts of valves, 17 parts of vacuum barrels, 18 parts of water storage barrels, 19 parts of handles, 20 parts of flanges, 20-1 parts of sealing gaskets and 20-2 parts of screws.
Detailed Description
The invention is described in detail below with reference to fig. 1.
As shown in fig. 1, the vacuum saturated tensiometer test device includes: the system comprises a vacuum pumping system 1, a saturation system 2 and a water storage system 3.
The connection mode of each part of the vacuum-pumping system 1 is as follows: one end of the air exhaust duct 6 is connected with a vacuum pump 5, the other end is connected with the vacuum barrel top cover 4 through a valve 7, a vacuum meter 8 is arranged on the vacuum barrel top cover 4, and a rubber gasket 4-1 is arranged between the top cover 4 and the vacuum barrel 17.
The saturation system comprises a sensor saturation chamber 9, a wire storage chamber 10 and a clay pipe protection chamber 11.
The sensor saturation chamber 9 is formed by separating a vacuum barrel top cover 4 and a sensor saturation chamber bottom plate 9-5. The sensor saturation chamber bottom plate 9-5 is in an open pore shape, a sensor saturation ring 9-2 is arranged on the sensor saturation chamber bottom plate, and the sensor 9-3 is fixed with an O-shaped sealing ring 9-4 through the sensor saturation ring 9-2 in a sealing mode. Then, the fixed sensor 9-3 and a sensor saturation chamber bottom plate 9-5 are horizontally placed on a supporting partition plate 10-4, a spring 10-3 is arranged between the sensor saturation chamber bottom plate 9-5 and the supporting partition plate 10-4, a sensor wire part is placed in a wire storage chamber 10, deaerated water is added into a sensor saturation ring 9-2, the water level needs to exceed the sensor 9-3, and then the wireless vibration exciter 9-1 is fixed on the sensor saturation chamber bottom plate 9-5. The number of the sensors 9-3 can be increased or decreased according to actual conditions.
The wire storage chamber 10 is formed by separating a sensor saturation chamber bottom plate 9-5 and a wire storage chamber bottom plate 10-1. The perforated wire storage chamber bottom plate 10-1 is horizontally placed on the wire storage chamber supporting partition plate 10-2.
The clay pipe protection chamber 11 is formed by separating a bottom plate 10-1 of the wire storage chamber and a bottom plate of the vacuum barrel 17. The bottom plate of the vacuum barrel 17 is provided with a pottery clay pipe mounting hole 11-1. The pottery clay pipe 11-2 is fixed on the pottery clay pipe mounting hole 11-1 through the inverted rubber stopper 11-3. If a plurality of clay pipes are not required to be saturated, the solid rubber plugs are required to be plugged into the rest clay pipe mounting holes 11-1. The flange 20 may be used to connect and secure the vacuum tank 17 and the water storage tank 18.
The water storage system comprises a water storage chamber 12, a water storage bottle 14, a bracket 13, a drainage conduit 15 and a valve 16. The sponge cushion layer 12-1 is used for protecting a tension meter pottery clay head 11-4. The reservoir bottle 14 supplies water to the reservoir chamber 12 through a drain conduit 15.
The method comprises the following steps:
(1) the pottery clay pipe 11-2 penetrates through the inverted rubber plug 11-3 to be fixed in the pottery clay pipe mounting hole 11-1, and the solid rubber plug is plugged in the rest pottery clay pipe mounting holes.
(2) The vacuum tank 17 is placed on the water storage tank 18 and the screws 20-2 on the flange 20 are tightened.
(3) The cord storage compartment bottom plate 10-1 is placed on the cord storage compartment support partition 10-2.
(4) The sensor 9-3 is fixed in the sensor saturation ring 9-2 and stores water, and then the sensor saturation ring is put into the sensor saturation chamber, and the sensor wire part is placed in the wire storage chamber 10 and is connected with the wireless vibration exciter 9-1 and the wireless vibration exciter power supply 9-6.
(5) The vacuum barrel top cover 4 is covered, a rubber gasket 4-1 is arranged between the top cover 4 and the vacuum barrel 17 in a cushioning mode, vaseline is coated, and the sealing performance between the top cover 4 and the vacuum barrel 17 is enhanced.
(6) Closing the valve 16 and the valve 12-2, opening the valve 7, pumping the gas in the vacuum barrel 17, the sensor 9-3, the clay pipe 11-2 and the clay head 11-4, continuously pumping the gas after the vacuum degree is close to 1 atmosphere negative pressure, opening the valve 16 to inject the degassing water into the water storage chamber 12, closing the valve 16 when the liquid level is close to the clay head 11-4, and stopping water injection after the liquid level of the injected degassing water slowly sinks 1-2cm above the top of the clay head 11-4.
(7) And starting the wireless vibration exciter 9-1 to discharge bubbles in the sensor 9-3.
(8) The valve 12-2 is opened to communicate the water storage chamber 12 with the outside, and the clay head 11-4 is gradually saturated by atmospheric pressure.
(9) When the liquid level of the water in the pottery clay head 11-4 is higher than the liquid level of the water in the water storage chamber 12, the air extraction is stopped.
(10) Taking off saturated clay head 11-4 and sensor 9-3.
(11) Before connecting the sensor and the argil head, an injector is needed to fill the argil pipe 11-2 and the sensor 9-3 with deaerated water, the port position needs to be a convex meniscus, and then the argil pipe 11-2 is connected with the sensor 9-3.
The invention discloses a rapid saturator of a miniature tension meter, which consists of a vacuum pumping system, a saturation system and a water storage system. The device can effectively saturate a plurality of micro tensiometers, has high saturation degree and is easy to control, shortens the reaction time of the tensiometer for measuring the substrate suction force, and can delay the cavitation erosion time of water in the argil head with high air inlet value, thereby improving the capability of the micro tensiometer with high air inlet value for measuring the substrate suction force exceeding 85 kPa. In addition, the number of single saturation tensiometers is increased, the saturation time is shortened, and the saturation efficiency of the micro tensiometer is improved. In the saturation process, the sensor is fixed in the sensor saturation ring and stores water, the pottery clay pipe penetrates through the inverted rubber plug and is fixed on the pottery clay pipe mounting hole, the vacuum pumping and the water injection are carried out, and the wireless vibration exciter is started, so that the operation process is simple and convenient.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and is equally applicable to other types of tensiometers. Any modification, change and equivalent structural change of the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. The rapid saturator of the miniature tension meter comprises a vacuum pumping system (1), a saturation system (2) and a water storage system (3);
the vacuum pumping system (1) comprises a vacuum pump (5), a vacuum meter (8) and a pumping guide pipe (6); one end of the air exhaust conduit (6) is connected with the vacuum pump (5), and the other end is connected with the top cover (4); the vacuum meter (8) is arranged on the top cover (4);
the saturation system (2) comprises a sensor saturation chamber (9), a wire storage chamber (10), a clay pipe protection chamber (11) and a vacuum barrel (17); the wireless vibration exciter (9-1) is fixed on a sensor saturation chamber bottom plate (9-5); a spring (10-3) is arranged below the sensor saturation chamber bottom plate (9-5), and the spring (10-3) is arranged on the supporting partition plate (10-4); the bottom plate (10-1) of the wire storage chamber is arranged on the supporting clapboard (10-2) of the wire storage chamber;
the water storage system (3) comprises a water storage bottle (14) and a water storage chamber (12); the water storage bottle (14) is connected with the water storage chamber (12) through a drainage conduit (15), and the water storage bottle (14) supplies water to the water storage chamber (12); the water storage system (3) is connected with the saturation system (2) through a flange (20).
2. The micro-tensiometer fast saturator of claim 1, wherein: the bottom plate of the vacuum barrel (17) is provided with a pottery clay pipe mounting hole (11-1).
3. The micro-tensiometer fast saturator of claim 1, wherein: the sensor saturation chamber (9) is provided with a wireless vibration exciter (9-1), and the wireless vibration exciter (9-1) is connected with a wireless vibration exciter power supply (9-6).
4. The micro-tensiometer fast saturator of claim 1, wherein: the sensor saturation chamber bottom plate (9-5) is provided with a sensor saturation ring (9-2), and the sensor (9-3) is fixed in the sensor saturation ring (9-2).
5. The micro-tensiometer fast saturator of claim 1, wherein: the bottom of the pottery clay pipe protection chamber (11) is provided with a pottery clay pipe mounting hole (11-1), and the pottery clay pipe (11-2) penetrates through the inverted rubber plug (11-3) and is fixed in the pottery clay pipe mounting hole (11-1).
6. The micro-tensiometer fast saturator of claim 1, wherein: a sponge cushion layer (12-1) is arranged at the bottom of the water storage chamber (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811485810.5A CN109540680B (en) | 2018-12-06 | 2018-12-06 | Quick saturator of miniature tensiometer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811485810.5A CN109540680B (en) | 2018-12-06 | 2018-12-06 | Quick saturator of miniature tensiometer |
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| CN109540680A CN109540680A (en) | 2019-03-29 |
| CN109540680B true CN109540680B (en) | 2022-08-05 |
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| CN115615878B (en) * | 2022-09-23 | 2024-01-23 | 浙江大学 | Automatic saturation device of high-range tensiometer and saturation manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6234008B1 (en) * | 1999-12-08 | 2001-05-22 | Massachusetts Institute Of Technology | Method and apparatus for the direct measurement of moisture characteristics of porous samples of soil, wood, concrete and the like |
| CN101915718B (en) * | 2010-08-20 | 2012-01-11 | 中国科学院武汉岩土力学研究所 | Multifunctional soil consolidation and penetration test device and test method thereof |
| CN102680665B (en) * | 2012-06-11 | 2014-07-02 | 长安大学 | Suction accurately controlled pressure plate instrument capable of directly saturating soil sample |
| CN103033447B (en) * | 2012-12-19 | 2015-09-02 | 哈尔滨工业大学深圳研究生院 | For measuring tensiometer and the assemble method thereof of the flow of water of soil water |
| CN103940975A (en) * | 2014-03-21 | 2014-07-23 | 西南交通大学 | Simple apparatus used for tensiometer saturation |
| CN104007050B (en) * | 2014-06-09 | 2017-01-04 | 华侨大学 | A kind of vibration control unsaturated soil column test system |
| CN104251790B (en) * | 2014-10-09 | 2017-12-29 | 中国地质大学（武汉） | Automatic water-filling formula ground sample saturator |
| CN205538388U (en) * | 2016-02-01 | 2016-08-31 | 河北建筑工程学院 | Integral vacuum saturation device |
| CN105842420B (en) * | 2016-03-28 | 2017-09-15 | 中南大学 | Unsaturated soil triaxial test matric suction fast balancing device and its application method |
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