CN212008249U

CN212008249U - Automatic variable water head permeameter device

Info

Publication number: CN212008249U
Application number: CN202020706858.0U
Authority: CN
Inventors: 范登峰; 王军培; 李亚琦; 俞昌华
Original assignee: Wuxi Hydrological Engineering Geological Survey Institute Co ltd
Current assignee: Wuxi Hydrological Engineering Geological Survey Institute Co ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-11-24
Anticipated expiration: 2030-04-30

Abstract

The utility model discloses an automatic variable water head permeameter device, which comprises a variable water head pipe, a permeable container, a water supply device, a water inlet pipe, a water outlet pipe and an exhaust pipe, wherein a pressure sensor is arranged on a platform where the permeable container is arranged, a water tank with an upper opening is arranged on the pressure sensor, and the pressure sensor is just opposite to the lower part of the water outlet pipe and is used for receiving the water outlet in the water outlet pipe; the bottom of the water tank is provided with a temperature sensor, the timer is fixed on the variable water head pipe, and the liquid level sensor is arranged on the variable water head pipe; when the pressure value generated by the water outlet in the water tank reaches the set value of the pressure sensor, the pressure sensor transmits a signal to the computer, and the computer controls the timer to read time data and the liquid level sensor to read liquid level data in real time and transmits the time data and the liquid level data to the computer. The utility model discloses add on the basis of existing equipment and establish sensor auto-induction monitoring, automatic reading, replace traditional artifical monitoring, realize the automation of conventional equipment to minimum cost improves detection work efficiency, reduction personnel intensity of labour.

Description

Automatic variable water head permeameter device

Technical Field

The utility model belongs to the technical field of hydrology monitoring, concretely relates to automatic variable water head permeameter device.

Background

The property of soil to be permeated by water is called soil permeability. The permeability is an important engineering property of the soil body, determines the strength property, deformation and consolidation properties of the soil body, and the permeability problem is one of three important problems of soil mechanics and is combined with the strength problem and the deformation problem to form three main problems of the soil mechanics. The penetration test is mainly to measure the permeability coefficient of the soil body, the definition of the permeability coefficient is the penetration flow rate of unit hydraulic gradient, and the unit is usually cm/s.

The variable head permeability test is a widely applied field test method for measuring the permeability coefficient of a soil body in a drill hole. During the test, the test head gradually decreased and eventually approached zero. And calculating the permeability coefficient of the test soil layer according to the relation between the falling speed of the test water head in the sleeve and the time. The method is mainly suitable for silt, sandy soil and cohesive soil with small permeability coefficient above or below the underground water level.

At present, the universal national standard detection method for the variable water head is used for manual monitoring and reading tests, occupies a large amount of manual time, brings inevitable manual errors, causes the increase of labor cost, and can not ensure the accuracy of detection data, so that the detection accuracy needs to be improved and the labor cost is reduced urgently.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome exist not enough among the prior art, the utility model provides an automatic variable water head permeameter device adds on the basis of former equipment and establishes sensor auto-induction monitoring, automatic reading, replaces traditional artifical monitoring, realizes the automation of conventional equipment to minimum cost improvement detection work efficiency, reduction personnel intensity of labour.

The technical scheme is as follows: in order to achieve the above object, the utility model adopts the following technical scheme:

an automatic variable water head permeameter device comprises a variable water head pipe, a permeation container, a water supply device, a water inlet pipe, a water outlet pipe, an exhaust pipe, a computer, and a pressure sensor, a timer, a liquid level sensor and a temperature sensor which are respectively in signal connection with the computer, wherein the platform on which the permeation container is located is provided with the pressure sensor; a water outlet of the water outlet pipe is provided with a temperature sensor for reading the temperature data of the outlet water and transmitting the temperature data to a computer; the timer is fixed on the variable water head pipe and used for reading real-time data and transmitting the real-time data to the computer; the liquid level sensor is arranged in the variable water head pipe and used for reading real-time liquid level data and transmitting the real-time liquid level data to the computer;

when the pressure difference between the pressure value generated by the effluent in the water tank and the initial set value of the pressure sensor is greater than 0 (when no water is produced, the initial set value of the pressure sensor is the pressure value when the water tank is empty), the pressure sensor transmits a signal to the computer, and the computer controls the timer to read time data and the liquid level sensor to read liquid level data in real time and transmits the time data and the liquid level data to the computer.

Furthermore, a water outlet is formed in the bottom of the water tank, and the outlet water is discharged and collected through a water discharge pipe; the drain pipe is provided with a solenoid valve switch, and the solenoid valve switch is in signal connection with the pressure sensor. When the pressure value reaches the set value of the drainage (usually, the weight of the water amount can be set to be 50-100 ml), a signal is transmitted to the electromagnetic valve switch to open the electromagnetic valve switch, the outlet water is drained through the drainage pipe until the pressure difference between the pressure value of the pressure sensor and the initial pressure value is zero after all the outlet water is drained, and then a signal is transmitted to the electromagnetic valve switch to close the electromagnetic valve switch.

Further, the liquid level sensor is selected from one of an ultrasonic liquid level meter, a floating ball liquid level meter and a static pressure type liquid level meter, preferably the ultrasonic liquid level meter is a digital level meter controlled by a microprocessor, pulse ultrasonic waves are emitted by the sensor (transducer) in measurement, sound waves are reflected by the surface of an object and then received by the same sensor, the sound waves are converted into electric signals, and the distance from the sensor to the measured object is calculated according to the time between the emission and the reception of the sound waves. Because of adopting non-contact measurement, the measured medium is almost not limited, and the method can be widely used for measuring the height of various liquid and solid materials; when measuring with an ultrasonic level gauge, an ultrasonic transducer is placed at the bottom of the container or above the liquid.

Has the advantages that: the utility model provides a pair of automatic variable water head permeameter device compares with prior art, has following advantage: the batch detection work efficiency of the permeability test is comprehensively improved, the labor intensity of personnel is reduced, the detection work cost is reduced, and the influence of the detection personnel on the detection result is reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a computer system architecture.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 shows an automatic variable head permeameter device, which comprises a variable head pipe 1, a permeable container 2, a water supply device 3, a water inlet pipe 4, a water outlet pipe 5, an exhaust pipe 6, a computer 10, and a pressure sensor 101, a timer 102, a liquid level sensor 103 and a temperature sensor 104 which are respectively connected with the computer 10 through signals, wherein the platform on which the permeable container 2 is located is provided with the pressure sensor 101, the pressure sensor 101 is provided with a water tank 12 with an opening at the upper part, and the water tank is opposite to the lower part of the water outlet pipe 5 and used for receiving the water outlet in the water outlet pipe 5, and the water outlet of the water outlet pipe 5 is provided with the temperature sensor 104; the timer 102 is fixed on the variable water head pipe 1 and used for reading real-time data and transmitting the real-time data to the computer 10; the liquid level sensor 103 is arranged in the variable water head pipe 1 and used for reading real-time liquid level data and transmitting the real-time liquid level data to the computer 10.

Use the utility model discloses variable head permeameter survey clay soil permeability coefficient under the variable head, the operating procedure is as follows:

1. and (3) placing the cutting ring filled with the soil sample into the infiltration container 2, screwing the nut, and sealing until no water or air is leaked.

2. Connecting the water inlet of the infiltration container 2 with the variable water head pipe 1, injecting water into the water inlet pipe 4 by using pure water of the water supply device 3, and infiltrating into the infiltration container 2; opening the exhaust pipe 6 to remove air permeating the bottom of the container 2 until no air bubbles exist in the overflowed water; the exhaust pipe 6 is closed and the water inlet pipe 4 is closed.

3. Injecting pure water into the water changing head pipe 1 to enable the water level to rise to a preset height, cutting off a water source after the water level is stable, and opening the water inlet pipe 4 to enable water to permeate through the soil sample; when water overflows from the water outlet to the water tank 12, the pressure difference between the pressure value generated by the water outlet and the initial set value of the pressure sensor 101 is larger than 0, the pressure sensor 101 transmits a signal to the computer 10, the computer 10 controls the timer 102 and the liquid level sensor 103 in real time to start measuring and recording the initial water head height and the initial time in the water head pipe 1 at the moment, then the water head height and the time are measured and recorded according to corresponding time intervals, and the water temperature at the water outlet is read according to the temperature sensor 104.

4. And (5) repeating the test for 5-6 times by using different initial water heads, and finishing the test when the permeability coefficient error value is within an allowable range.

As a preferred embodiment, a water outlet is formed at the bottom of the water tank 12, and the outlet water is discharged and collected through a water discharge pipe; an electromagnetic valve 13 is arranged on the water discharge pipe, and the electromagnetic valve 13 is connected with a pressure sensor 101. When the pressure value reaches the set value of the drainage, a signal is transmitted to the electromagnetic valve 13 to open the electromagnetic valve, the discharged water is drained through the drainage pipe until the pressure difference between the pressure value of the pressure sensor 101 and the initial pressure value is zero after all the water is drained, and then the signal is transmitted to the electromagnetic valve 13 to close the electromagnetic valve.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides an automatic variable water head permeameter device, includes variable water head pipe (1), infiltration container (2), water supply installation (3), inlet tube (4), outlet pipe (5), blast pipe (6), its characterized in that: the water purifier is characterized by further comprising a computer (10), and a pressure sensor (101), a timer (102), a liquid level sensor (103) and a temperature sensor (104) which are respectively in signal connection with the computer (10), wherein the pressure sensor (101) is arranged on a platform where the infiltration container (2) is located, a water tank (12) with an opening in the upper portion is placed on the pressure sensor (101), and the water tank is opposite to the lower portion of the water outlet pipe (5) and used for receiving outlet water in the water outlet pipe (5);

the temperature sensor (104) is arranged at a water outlet of the water outlet pipe (5), the timer (102) is arranged on the water changing head pipe (1), and the liquid level sensor (103) is arranged in the water changing head pipe (1); when the pressure difference between the pressure value generated by the water outlet in the water tank (12) and the initial set value of the pressure sensor (101) is larger than 0, the pressure sensor (101) transmits a signal to the computer (10), and the computer (10) controls the timer (102) to read time data and the liquid level sensor (103) to read liquid level data in real time and transmits the time data and the liquid level data to the computer (10).

2. The automatic variable head permeameter device according to claim 1, wherein: a water outlet is formed in the bottom of the water tank (12), and outlet water is discharged and collected through a water discharge pipe; an electromagnetic valve (13) is arranged on the drain pipe, and the electromagnetic valve (13) is in signal connection with the pressure sensor (101).

3. The automatic variable head permeameter device according to claim 1, wherein: the liquid level sensor (103) is an ultrasonic liquid level meter.

4. The automatic variable head permeameter device according to claim 1, wherein: when water is not discharged, the initial set value of the pressure sensor (101) is the pressure value when the water tank (12) is empty.