CN217033538U

CN217033538U - Automatic control test pit water injection test device

Info

Publication number: CN217033538U
Application number: CN202220701759.2U
Authority: CN
Inventors: 董忠级; 张吉宏; 许蓁蓁; 师利君; 张军
Original assignee: Xi'an Engineering Investigation & Design Institute Of China National Nonferrous Metals Industry Co ltd
Current assignee: Xi'an Engineering Investigation & Design Institute Of China National Nonferrous Metals Industry Co ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-07-22
Anticipated expiration: 2032-03-29

Abstract

The utility model provides an automatic control test pit water injection test device which comprises an automatic controller, wherein the automatic controller is positioned outside a test pit, and a data acquisition instrument is connected with the automatic controller through a lead; the bottom of the cylinder with the upper end and the lower end being opened is embedded into the bottom of the test pit; the bracket is fixed on the periphery of the cylinder; the water storage tank is fixed on the support, a water injection pipe is installed at an opening at the bottom of the water storage tank, and the extending end of the water injection pipe is located in the cylinder and is 5-10 cm away from the pit bottom; a flowmeter and a control valve are respectively arranged in the water injection pipe; the water level monitoring sensor is fixedly arranged on the inner side of the cylinder; the flow meter, the control valve and the water level monitoring sensor are respectively connected with the data acquisition instrument through leads. The problem of need rely on artifical water injection control water level, naked eye observation and record infiltration time and infiltration volume inaccurate etc. that exists among the prior art is solved.

Description

Automatic control test pit water injection test device

Technical Field

The utility model belongs to the technical field of geotechnical engineering investigation, and relates to an automatic control test pit water injection test device.

Background

The permeability is one of important engineering properties of soil, and is an important parameter for reflecting the water permeability, strength property and structural stability of the soil. The permeability of soil is mainly reflected by the magnitude of permeability coefficient, and the testing method of the permeability coefficient mainly comprises a field pit-testing water injection test and an indoor test, and the field test can better reflect the real condition of soil body pores under the condition of not damaging the natural state of the soil body. The single-loop method is a field test method capable of quickly and accurately measuring the permeability coefficient of the soil body, and the principle of the method is that water is injected into a test pit and the water level is kept constant, the infiltration time and the infiltration amount are measured within a set time, and then the permeability coefficient of the soil body is obtained through calculation. The water level is controlled mainly by manual water injection in the traditional single-ring method water seepage test process, and the infiltration time and the water seepage amount are recorded, so that the method has a plurality of limitations, on one hand, manual water injection needs to be participated in by a tester in the whole process, and a large amount of manpower and material resources need to be invested; on the other hand, the water level precision can not be well controlled in the test process by manual water injection, and meanwhile, the test result is influenced to a certain extent by visual observation and record.

Disclosure of Invention

In order to achieve the purpose, the utility model provides an automatic control test pit water injection test device, which solves the problems that the water level needs to be controlled by manual water injection, the infiltration time needs to be observed and recorded by naked eyes, the water seepage amount is inaccurate and the like in the prior art.

In order to solve the technical problem, the utility model adopts the technical scheme that the automatic control pit water injection test device comprises an automatic controller, wherein the automatic controller is positioned outside a test pit, and a data acquisition instrument is connected with the automatic controller through a lead; the bottom of the cylinder with the upper end and the lower end being opened is embedded into the bottom of the test pit; the bracket is fixed on the periphery of the cylinder; the water storage tank is fixed on the support, a water injection pipe is installed at an opening at the bottom of the water storage tank, and the extending end of the water injection pipe is located in the cylinder and is 5-10 cm away from the pit bottom; a flowmeter and a control valve are respectively arranged in the water injection pipe; the water level monitoring sensor is fixedly arranged on the inner side of the cylinder; the flow meter, the control valve and the water level monitoring sensor are respectively connected with the data acquisition instrument through leads.

Furthermore, the model of the automatic controller is HK-PG-B/A-I.

Further, the data acquisition instrument is an HK-PG-B/A type water level-time acquisition instrument.

Furthermore, a filter screen is arranged at the port of the extending end of the water injection pipe.

Further, the flowmeter is a TUF-2000M probe type ultrasonic flowmeter.

Furthermore, the quantity of the water level monitoring sensors is 3, and the water level monitoring sensors are arranged in an equilateral triangle shape.

Furthermore, the water level monitoring sensor adopts a fiber grating sensor.

Furthermore, the model of the water level monitoring sensor is XKFG-I.

The beneficial effects of the utility model are:

the automatic controller of the full-automatic pit testing water injection test device provided by the utility model is internally preset with basic test parameters, particularly can be used for presetting test water level and data acquisition time interval according to test requirements, acquiring and transmitting data in real time, can be completely separated from manual control after the test is started, and has high automation degree; the fiber bragg grating sensor used for water level control has the advantages of small volume, good water resistance, high precision and good stability, can accurately measure the test seepage amount, accurately control the test water injection level, supplement water in time and improve the test precision; the automatic control instrument has a far-end transmission function, test progress of a plurality of projects can be conveniently and remotely controlled by a tester at the same time, test information can be mastered in time, test efficiency is improved, and meanwhile, data acquisition electronization facilitates arrangement and gear retention of test data.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of an automatic control pit filling test apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic view of a water injection tube port according to an embodiment of the present invention.

Fig. 3 is a schematic view of a water level monitoring sensor according to an embodiment of the present invention.

In the figure, 1, an automatic controller, 2, a data acquisition instrument, 3, a cylinder, 4, a bracket, 5, a water storage tank, 6, a water injection pipe, 7, a flowmeter, 8, a control valve, 9, a water level monitoring sensor and 10, wires.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

As shown in figure 1, the utility model provides an automatic control test pit water injection test device, which comprises an automatic controller 1, a data acquisition instrument 2, a cylinder 3, a bracket 4, a water storage tank 5, a water injection pipe 6, a flowmeter 7, a control valve 8, a water level monitoring sensor 9 and a lead 10, wherein the automatic controller is connected with the water storage tank through the lead 10; the automatic control instrument 1 is positioned outside the test pit, is used for controlling, recording and remotely transmitting data, and is an automatic control instrument with the model number of HK-PG-B/A-I produced by Beijing Hua Jing science and technology company; the data acquisition instrument 2 is a HK-PG-B/A type water level-time acquisition instrument matched with the automatic controller 1, and the data acquisition instrument 2 is connected with the automatic controller 1 through a lead 10 and is used for acquiring test data and transmitting the test data to the automatic controller 1; the lower end of the cylinder 3 with the upper end and the lower end open is embedded into the bottom of the test pit; the bracket 4 is fixed on the periphery of the cylinder 3; the water storage tank 5 is fixed on the support 4, a water injection pipe 6 is installed at an opening at the bottom of the water storage tank 5, an extending end port of the water injection pipe 6 is located in the cylinder 3 and is 5-10 cm away from the pit bottom, and the experimental precision can be influenced when the distance is too far or too close; a flowmeter 7 and a control valve 8 are respectively arranged in the water injection pipe 6; the water level monitoring sensor 9 is fixedly arranged on the inner side of the cylinder 3; flowmeter 7, control valve 8, water level monitoring sensor 9 respectively is connected with data acquisition instrument 2 through wire 10, automatic control appearance 1 is through data acquisition instrument 2, wire 10 corresponds transmission to flowmeter 7 respectively with predetermined experimental basic parameter, control valve 8, water level monitoring sensor 9, the water level condition in the water level monitoring sensor 9 real-time supervision examination hole, when the water level is less than predetermined water level, control valve 8 is automatic to be opened and is carried out the water injection, when the water level is higher than predetermined water level, control valve 8 self-closing, flowmeter 7 is used for experimental data such as statistics water injection volume.

Further, a data input component and a data output component are arranged in the automatic controller 1; the data input assembly is used for presetting test basic parameters such as the diameter of the cylinder 3, the height of the cylinder 3, test water level, data acquisition time and the like, and the data output assembly is used for transmitting test data such as water injection quantity, water injection time, real-time water level and the like acquired by the data acquisition instrument 2 to a remote terminal system (such as a computer) for collection and processing.

Further, as shown in fig. 2, a filter screen is arranged at the end port of the extending end of the water injection pipe 6 for reducing the disturbance of water flow to the water in the test pit.

Further, as shown in fig. 3, the water level monitoring sensor 9 is a fiber grating sensor, and the model is XKFG-i.

Further, the flow meter 7 is a TUF-2000M probe type ultrasonic flow meter manufactured by an american meter.

Further, the quantity of water level monitoring sensor 9 is 3, is equilateral triangle and arranges, can effectively avoid the error that the surface of water fluctuation brought to increase water level monitoring's accuracy. 3 water level monitoring sensor 9 will record simultaneously highly the transmission of water level to automatic control appearance 1, and whether automatic control appearance 1 is through the water level height judgement after getting the average through 8 water injection of control valve.

In addition, the circuit connection mode which is not described in the utility model is the conventional technical means in the field.

The working process of the utility model is as follows:

firstly, assembling a test device according to a connection mode shown in fig. 1, opening an automatic controller 1 and a data acquisition instrument 2, presetting basic information such as the diameter of a cylinder 3, the height of the cylinder 3, the height of a test water level, a data acquisition interval and the like on the automatic controller 1, starting a test, and automatically opening a control valve 8 to inject water into a test pit to a water level required by the test; in the test process, water level and water pressure change caused by continuous water seepage in the test pit, the grating wavelength of the water level monitoring sensor 9 is continuously changed, the water level is monitored in real time, when the water level of the test pit is lower than the preset water level height of the test, the control valve 8 is automatically opened to inject water into the test pit, and when the water level of the test pit is level with the preset water level, the control valve 8 is automatically closed to realize accurate water level control; when the whole test is carried out, the flow meter 7 installed in the water injection pipe monitors the water injection amount in real time, the monitored data are transmitted to the automatic controller 1 through the data acquisition instrument 2 and then transmitted to the remote terminal system through the data output assembly, and the remote terminal system processes the test data to obtain the permeability coefficient of the soil in the test pit.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. An automatic control test pit water injection test device is characterized by comprising an automatic controller (1); the automatic control instrument (1) is positioned outside the test pit, and the data acquisition instrument (2) is connected with the automatic control instrument (1) through a lead (10); the bottom of a cylinder (3) with an opening at the upper end and the lower end is embedded into the bottom of the test pit; the bracket (4) is fixed on the periphery of the cylinder (3); the water storage tank (5) is fixed on the support (4), a water injection pipe (6) is installed at an opening at the bottom of the water storage tank (5), and the extending end of the water injection pipe (6) is located in the cylinder (3) and is 5-10 cm away from the pit bottom; a flowmeter (7) and a control valve (8) are respectively arranged in the water injection pipe (6); the water level monitoring sensor (9) is fixedly arranged on the inner side of the cylinder (3); the flowmeter (7), the control valve (8) and the water level monitoring sensor (9) are respectively connected with the data acquisition instrument (2) through leads (10).

2. An automatic control test pit water injection test device according to claim 1, characterized in that the automatic controller (1) is HK-PG-B/A-I.

3. An automatic control test pit water injection test device according to claim 1, characterized in that the data collector (2) is a HK-PG-B/A type water level-time collector.

4. The automatic control test pit water injection test device according to claim 1, characterized in that the port of the extending end of the water injection pipe (6) is provided with a filter screen.

5. An automatic control test pit water injection test device according to claim 1, characterized in that the flowmeter (7) is a TUF-2000M probe type ultrasonic flowmeter.

6. An automatic control test pit water injection test device according to claim 1, characterized in that the number of said water level monitoring sensors (9) is 3, and they are arranged in an equilateral triangle.

7. An automatic control test pit water injection test device according to any one of claims 1 or 6, characterized in that said water level monitoring sensor (9) is a fiber grating sensor.

8. An automatic control test pit water injection test device according to claim 6, characterized in that the model of the water level monitoring sensor (9) is XKFG-I.