CN111458247A - Automatic liquid changing device and method based on buffer material erosion test - Google Patents

Abstract

The invention discloses an automatic liquid changing device and method based on a buffer material erosion test. The device includes a plurality of liquid exchange subsystems; the liquid outlet port of each liquid exchange subsystem is connected with the liquid inlet end of the erosion experimental device; the liquid inlet port of each liquid exchange subsystem is connected with the outlet of the erosion experimental device. The liquid end is connected; the liquid exchange subsystem is provided with a timing valve, and the liquid exchange subsystem alternately performs liquid exchange operations according to the opening and closing states of the timing valve; the detection device in the liquid exchange subsystem is used to detect the parameters of the solution in the liquid container. The automatic liquid exchange device and method based on the buffer material erosion test provided by the invention can realize automatic determination of the turbidity and conductivity of the solution during the automatic liquid exchange process.

Description

A kind of automatic liquid exchange device and method based on buffer material erosion test

technical field

The invention relates to the technical field of buffer material performance test for geological disposal of high-level radioactive waste, in particular to an automatic liquid exchange device and method based on a buffer material erosion test.

Background technique

Groundwater is the carrier for the leakage of high-level radioactive waste to the external space of the repository. As the last artificial barrier filled between the waste tank and the geological body, the buffer material plays an important role as a hydraulic barrier, blocking the flow of groundwater (which may contain corrosive substances) to the surface of the waste tank, while blocking the waste tank water-soluble compounds and Nuclides seep into the surrounding rock. Numerous studies have shown that bentonite is a suitable substrate for buffer materials, so it is necessary to understand the erosion characteristics of bentonite under different solution conditions.

Studying the erosion experiment of bentonite not only requires manual determination of the parameters of its solution every day, including turbidity and electrical conductivity, but also needs to change the solution from time to time. The existing equipment is relatively scattered, and it is time-consuming and laborious to change the solution and measure its turbidity and conductivity each time.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an automatic liquid exchange device and method based on the erosion test of buffer materials, which can realize the automatic determination of the parameters of the solution during the automatic liquid exchange process.

For achieving the above object, the present invention provides the following scheme:

The invention provides an automatic liquid exchange device based on the erosion test of buffer material, comprising:

Multiple fluid exchange subsystems;

The liquid outlet port of each of the liquid exchange subsystems is connected to the liquid inlet end of the erosion experiment device; the liquid inlet port of each of the liquid exchange subsystems is connected to the liquid outlet end of the erosion experiment device; the The erosion experiment device has a built-in buffer material;

The liquid addition port of the liquid exchange subsystem is used to add the solution used in the erosion experiment to the liquid filling container in the liquid exchange subsystem; the liquid outlet port of the liquid exchange subsystem is used to add the liquid filling container to the liquid container. The solution is discharged into the liquid inlet end of the erosion experiment device; the liquid inlet port of the liquid exchange subsystem is used to flow the erosion solution from the outlet end of the erosion experiment device into the liquid container; the The discharge port of the liquid exchange subsystem is used to discharge the solution in the liquid container; the liquid exchange subsystem is provided with a timing valve, and the liquid exchange subsystem alternately changes according to the opening and closing states of the timing valve. liquid operation; the detection device in the liquid exchange subsystem is used to detect the parameters of the solution in the liquid container.

optional,

The liquid exchange subsystem specifically includes:

The liquid inlet pipe is provided with the liquid inlet timing valve, the liquid outlet pipe is provided with the liquid outlet timing valve, the liquid addition pipe is provided with the liquid addition timing valve, the liquid discharge pipe and the liquid filling container are provided with the liquid discharge timing valve;

The liquid outlet port of the liquid inlet pipe is connected with the liquid inlet end of the erosion experiment device, and the liquid inlet end of the liquid inlet pipe is placed in the liquid container;

The liquid inlet port of the liquid outlet pipe is connected with the liquid outlet end of the erosion experiment device, and the liquid outlet end of the liquid outlet pipe is placed in the liquid container;

The liquid outlet end of the liquid addition pipe is placed in the liquid filling container, and the liquid addition port of the liquid addition pipe is used for adding the solution used in the erosion experiment;

The liquid inlet end of the liquid discharge pipe is arranged at the bottom of the liquid filling container, and the liquid discharge port of the liquid discharge pipe is used for discharging the solution in the liquid filling container.

Optionally, the detection device specifically includes:

Turbidity detection device and conductivity detection device;

The detection part of the turbidity detection device is placed inside the liquid container, and the turbidity detection device is used to detect the turbidity of the solution in the liquid container;

The detection part of the conductivity detection device is placed inside the liquid container, and the conductivity detection device is used to detect the conductivity of the solution in the liquid container.

Optionally, the automatic liquid exchange device further includes:

liquid collecting device;

The liquid discharge port of the liquid discharge pipe is placed in the liquid collecting device, and the liquid collecting device is used for collecting the solution discharged from the liquid filling container.

Optionally, the liquid collecting device specifically includes:

Collection tank and heating device;

The liquid discharge port of the liquid discharge pipe is placed in the liquid collecting tank, and the heating device is located inside the liquid collecting tank, and the heating device is used for heating and evaporating the solution in the liquid collecting tank.

Optionally, the automatic liquid exchange device further includes:

agitator;

The stirring part of the stirrer is placed inside the liquid-filling container, and the stirrer is used for stirring the liquid in the liquid-filling container.

The present invention also provides an automatic liquid exchange method based on the buffer material erosion test, which is applied to the above-mentioned automatic liquid exchange device based on the buffer material erosion test, including:

Acquire the timing time; the timing time is the time for controlling the opening and closing of the timing valve;

Switch the liquid exchange subsystem for the erosion experiment according to the timing time, and perform the liquid exchange operation on the liquid exchange subsystem before the switching when the switched liquid exchange subsystem performs the erosion experiment;

Determine whether the instruction to stop the liquid exchange operation is received; if the instruction is received, the liquid exchange operation is stopped; if the instruction is not received, return to the step "switch the liquid exchange subsystem for the erosion experiment according to the timing time, and During the erosion experiment of the switched liquid exchange subsystem, the liquid exchange operation of the pre-switched liquid exchange subsystem is carried out”.

Optionally, before the switching of the liquid exchange subsystem for performing the erosion experiment according to the timing time, the method further includes:

Open the liquid addition timing valve in the current liquid exchange subsystem, add the solution used in the erosion experiment to the liquid filling container in the current liquid exchange subsystem, and start timing;

After the preset liquid addition time is exceeded, the liquid addition timing valve in the current liquid exchange subsystem is closed;

Open the liquid inlet timing valve in the current liquid exchange subsystem and the liquid outlet timing valve in the current liquid exchange subsystem;

The stirrer in the current liquid exchange subsystem stirs the solution in the liquid container in the current liquid exchange subsystem according to the preset stirring time, and the detection device in the current liquid exchange subsystem detects the solution parameters according to the preset detection time.

Optionally, switching the liquid exchange subsystem that performs the erosion experiment according to the timing, and performs a liquid exchange operation on the liquid exchange subsystem before the switching when the switched liquid exchange subsystem performs the erosion experiment. , including:

Open the liquid addition timing valve of the subsystem to be switched according to the timing time and start timing, and close the liquid addition timing valve of the to-be-switched subsystem after the preset liquid addition time is exceeded;

Close the liquid inlet timing valve in the current liquid exchange subsystem and the liquid outlet timing valve in the current liquid exchange subsystem according to the timing time, and simultaneously open the liquid inlet timing valve of the sub-system to be switched and the sub-system to be switched The liquid outlet timing valve;

The stirrer in the subsystem to be switched stirs the solution in the liquid container in the subsystem to be switched according to the preset stirring time, and the detection device in the subsystem to be switched detects the solution parameter according to the preset detection time;

Open the liquid discharge timing valve in the current liquid exchange subsystem and start timing, and close the liquid discharge timing valve in the current liquid exchange subsystem after the preset liquid discharge time is exceeded.

Compared with the prior art, the beneficial effects of the present invention are:

The invention proposes an automatic liquid exchange device and method based on a buffer material erosion test. The device includes a plurality of liquid exchange subsystems; the liquid outlet port of each liquid exchange subsystem is connected to the liquid inlet end of the erosion test device. connection; the liquid inlet port of each liquid exchange subsystem is connected with the liquid outlet end of the erosion experiment device; the liquid exchange subsystem is provided with a timing valve, and the liquid exchange subsystem performs liquid exchange operations alternately according to the opening and closing states of the timing valve; The detection device in the liquid exchange subsystem is used to detect the parameters of the solution in the liquid container, and can automatically measure the turbidity and conductivity of the solution during the automatic liquid exchange process.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative labor.

FIG. 1 is a structural diagram of an automatic liquid exchange device based on a buffer material erosion test in an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The purpose of the present invention is to provide an automatic liquid exchange device and method based on a buffer material erosion test, which can automatically measure the turbidity and conductivity of the solution during the automatic liquid exchange process.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

An automatic liquid exchange device based on a buffer material erosion test provided by the present invention includes a plurality of liquid exchange subsystems. The liquid outlet port of each liquid exchange subsystem is connected with the liquid inlet port of the erosion experiment device; the liquid inlet port of each liquid exchange subsystem is connected with the liquid outlet port of the erosion experiment device; the erosion experiment device has a built-in Buffer material; the liquid filling port of the liquid exchange subsystem is used to add the solution used in the erosion experiment to the liquid filling container in the liquid exchange subsystem; the liquid outlet port of the liquid exchange subsystem is used to discharge the solution in the liquid filling container into the flushing system. The liquid inlet end of the erosion experiment device; the liquid inlet port of the liquid exchange subsystem is used to flow the erosion solution flowing out of the liquid outlet end of the erosion experiment device into the liquid container; The liquid exchange subsystem is provided with a timing valve, and the liquid exchange subsystem alternately performs liquid exchange operations according to the opening and closing states of the timing valve; the detection device in the liquid exchange subsystem is used to detect the parameters of the solution in the liquid container.

The liquid exchange subsystem specifically includes: a liquid inlet pipe provided with a liquid inlet timing valve, a liquid outlet pipe provided with a liquid outlet timing valve, a liquid addition pipe provided with a liquid addition timing valve, and a liquid discharge pipe provided with a liquid discharge timing valve Tubes and liquid containers. The liquid outlet port of the liquid inlet pipe (that is, the liquid outlet port of the liquid exchange subsystem) is connected with the liquid inlet port of the liquid inlet pipe of the erosion experiment device, and the liquid inlet end of the liquid inlet pipe is placed in the liquid container; the liquid outlet pipe The liquid inlet port (that is, the liquid inlet port of the liquid exchange subsystem) is connected to the liquid outlet port of the liquid outlet pipe of the erosion experiment device, and the liquid outlet port of the liquid outlet pipe is placed in the liquid container; the liquid outlet end of the liquid addition pipe It is placed in the liquid filling container, and the liquid filling port of the liquid filling pipe (that is, the liquid filling port of the liquid exchange subsystem) is used to add the solution used in the erosion experiment; the liquid inlet end of the liquid discharge pipe is set at the bottom of the liquid filling container, and drain The liquid discharge port of the liquid pipe (ie, the liquid discharge port of the liquid exchange subsystem) is used to discharge the solution in the liquid filling container.

The detection device specifically includes: a turbidity detection device and a conductivity detection device. The detection part of the turbidity detection device is arranged inside the liquid container, and the turbidity detection device is used to detect the turbidity of the solution in the liquid container. The detection part of the conductivity detection device is arranged inside the liquid container, and the conductivity detection device is used to detect the conductivity of the solution in the liquid container.

The automatic liquid changing device also includes: a liquid collecting device. The discharge port of the discharge pipe is placed in the liquid collecting device, and the liquid collecting device is used to collect the solution discharged from the liquid filling container.

The liquid collecting device specifically includes: a liquid collecting tank and a heating device. The heating device is located inside the collecting tank, and the heating device is used to heat the solution in the evaporating liquid collecting tank.

The automatic liquid changing device also includes: a stirrer. The stirring part of the stirrer is placed inside the liquid container, and the stirrer is used to stir the liquid in the liquid container.

Taking the automatic liquid exchange device including two liquid exchange subsystems as an example, the device structure of the present invention is further described. FIG. 1 is a structural diagram of an automatic liquid exchange device based on a buffer material erosion test in an embodiment of the present invention. As shown in FIG. 1 , an automatic liquid exchange device for a buffer material erosion test mainly includes: a liquid inlet pipe 1 , liquid addition pipe 2, liquid outlet pipe 3, liquid discharge pipe 4, turbidity probe 5 and 6, conductivity probe 7 and 8, agitator 9 and 10, liquid addition timing valve 11 and 12, liquid inlet timing valve 13 and 14. Liquid discharge timing valves 15 and 16, liquid discharge timing valves 17 and 18, liquid collecting tank 19, and 500ml liquid containers 20 and 21.

The liquid inlet pipe 1 is connected with a three-way pipe joint, one end is connected to the liquid inlet pipe of the erosion experiment, and the other two ends are respectively connected to 500ml liquid filling containers 20 and 21. The liquid inlet timing valves 13 and 14 are installed on the liquid inlet pipe 1 leading to the 500ml liquid filling containers 20 and 21 .

The liquid addition pipe 2 is connected with a three-way pipe joint, one end is connected to the container of the solution required for the erosion experiment, and the other two ends are connected to the 500ml liquid container 20 and 21 respectively; 500ml liquid container 20 and 21 on the filling pipe 2.

The liquid outlet pipe 3 is connected with a three-way pipe joint, one end is connected to the installed liquid outlet pipe of the erosion experiment, and the other two ends are respectively connected to the 500ml liquid filling containers 20 and 21; on the liquid outlet pipes 3 of the liquid containers 20 and 21.

The drain pipe 4 is connected with a three-way pipe joint, one end is connected to the liquid collecting tank 19, and the other two ends are respectively connected to the 500ml liquid filling containers 20 and 21; on the drain pipe 4.

The turbidity probe 5 and the conductivity probe 7 are installed in the 500ml liquid container 20, the turbidity probe 6 and the conductivity probe 8 are installed in the 500ml liquid container 21, and sealing measures are taken to prevent water leakage. Install the stirrers 9 and 10 in the 500ml liquid containers 20 and 21 respectively, and adjust the stirrers to be at the proper position and height to prevent them from hitting the tubes and inner walls of the 500ml liquid containers 20 and 21 during rotation.

The present invention also provides an automatic liquid exchange method based on the erosion test of the buffer material, comprising:

Step 1: Obtain the timing time; the timing time is the time for controlling the opening and closing of the timing valve.

Open the liquid addition timing valve in the current liquid exchange subsystem, add the solution used in the erosion experiment to the liquid filling container in the current liquid exchange subsystem, and start timing;

After the preset liquid addition time is exceeded, close the liquid addition timing valve in the current liquid exchange subsystem;

Open the liquid inlet timing valve in the current liquid exchange subsystem and the liquid outlet timing valve in the current liquid exchange subsystem;

The stirrer in the current liquid exchange subsystem stirs the solution in the liquid container in the current liquid exchange subsystem according to the preset stirring time, and the detection device in the current liquid exchange subsystem detects the solution parameters according to the preset detection time.

Step 2: Switch the liquid exchange subsystem for the erosion experiment according to the timing time, and perform the liquid exchange operation on the liquid exchange subsystem before the switch when the exchanged liquid exchange subsystem performs the erosion experiment.

Step 2 specifically includes:

Open the liquid addition timing valve of the subsystem to be switched according to the timing time and start timing, and close the liquid addition timing valve of the to-be-switched subsystem after the preset liquid addition time is exceeded;

Close the liquid inlet timing valve in the current liquid exchange subsystem and the liquid outlet timing valve in the current liquid exchange subsystem according to the timing time, and open the liquid inlet timing valve of the to-be-switched subsystem and the liquid-out timing valve of the to-be-switched subsystem at the same time;

The stirrer in the subsystem to be switched stirs the solution in the liquid container in the subsystem to be switched according to the preset stirring time, and the detection device in the subsystem to be switched detects the solution parameters according to the preset detection time;

Open the liquid discharge timing valve in the current liquid exchange subsystem and start timing, and close the liquid discharge timing valve in the current liquid exchange subsystem after the preset liquid discharge time is exceeded.

Step 3: determine whether an instruction to stop the liquid exchange operation is received; if an instruction is received, execute step 4; if no instruction is received, return to step 2.

Step 4: Stop the liquid change operation.

Taking the automatic liquid exchange device including two liquid exchange subsystems as an example, the method flow of the present invention is further described. The method flow is based on the automatic liquid exchange method of the automatic liquid exchange device in FIG. 1 , and the method includes:

(1) Connect the assembled erosion test device to the liquid inlet pipe 1 and the liquid outlet pipe 3;

(2) Connect the liquid filling pipe 2 to the liquid filling container;

(3) opening the liquid addition timing valve 11, and after all other valves are closed, inject 500ml of the solution used in the erosion experiment into the 500ml liquid filling container 20;

(4) Power on the turbidity probes 5 and 6, the conductivity probes 7 and 8, and the stirrers 9 and 10, respectively.

(5) The liquid inlet timing valve 13 and the liquid outlet timing valve 15 are opened for 24 hours;

(6) set the stirrer 9 to stir every 30 minutes, and record the turbidity probe 5 and the conductivity probe 7 every 30 minutes;

(7) after 23 hours (that is, after the liquid inlet timing valve 13 and the liquid outlet timing valve 15 are opened for 23 hours), the liquid addition timing valve 12 is opened, and the solution used in the 500ml erosion experiment is injected into the 500ml liquid container 21 and closed;

(8) After 24 hours (that is, 24 hours after the liquid inlet timing valve 13 and the liquid outlet timing valve 15 are opened), the liquid inlet timing valve 13 and the liquid outlet timing valve 15 are closed, and the liquid inlet timing valve 14 and the liquid outlet timing valve 16 open for 24 hours;

(9) set the stirrer 10 to stir every 30 minutes, and record the turbidity probe 6 and the conductivity probe 8 every 30 minutes;

(10) Open the drain timing valve 17, and the liquid collecting tank 19 starts to heat and evaporate the solution used in the erosion experiment that the 500ml liquid container 20 flows into;

(11) After 1 hour (that is, 1 hour after opening the drain timing valve 17), close the drain timing valve 17;

(12) after 23 hours (that is, after the liquid inlet timing valve 14 and the liquid outlet timing valve 16 are opened for 23 hours), the liquid addition timing valve 11 is opened, and the solution used in the 500ml erosion experiment is injected into the 500ml liquid container 20 and closed;

(13) After 24 hours (that is, 24 hours after the liquid inlet timing valve 14 and the liquid outlet timing valve 16 are opened), the liquid inlet timing valve 14 and the liquid outlet timing valve 16 are closed, and the liquid inlet timing valve 13 and the liquid outlet timing valve 15 are opened. 24 hours;

(14) The drain timing valve 18 is opened, and the liquid collecting tank 19 starts to heat and evaporate the solution used in the erosion experiment that flows into the 500ml liquid container 21;

(15) After 1 hour (that is, 1 hour after the drain timing valve 18 is opened), close the drain timing valve 18, and cycle from step (7) until the entire erosion test ends.

The automatic liquid changing method provided by the present invention reduces the influence of artificial time difference on the experimental test results by changing the solution at equal intervals in the erosion experiment of bentonite.

In this paper, specific examples are used to illustrate the principles and implementations of the present invention. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present invention; meanwhile, for those skilled in the art, according to the present invention There will be changes in the specific implementation and application scope. In conclusion, the contents of this specification should not be construed as limiting the present invention.

Claims (9)

1. The utility model provides an automatic liquid device that trades based on buffer material erosion test which characterized in that includes:

a plurality of liquid change subsystems;

the liquid outlet port of each liquid changing subsystem is connected with the liquid inlet end of the erosion experimental device; the liquid inlet port of each liquid changing subsystem is connected with the liquid outlet end of the erosion experimental device; a buffer material is arranged in the erosion experimental device;

the liquid adding port of the liquid changing subsystem is used for adding a solution for an erosion experiment to a liquid container in the liquid changing subsystem; the liquid outlet port of the liquid changing subsystem is used for discharging the solution in the liquid container into the liquid inlet end of the erosion experimental device; the liquid inlet port of the liquid changing subsystem is used for enabling the erosion solution flowing out of the liquid outlet end of the erosion experimental device to flow into the liquid container; the liquid discharge port of the liquid changing subsystem is used for discharging the solution in the liquid container; the liquid changing subsystem is provided with a timing valve and alternately carries out liquid changing operation according to the opening and closing state of the timing valve; and the detection device in the liquid change subsystem is used for detecting the parameters of the solution in the liquid container.

2. The automatic liquid changing device based on the buffer material erosion test according to claim 1,

the liquid changing subsystem specifically comprises:

the liquid feeding device comprises a liquid feeding pipe provided with a liquid feeding timing valve, a liquid discharging pipe provided with a liquid discharging timing valve and a liquid container;

the liquid outlet end of the liquid inlet pipe is connected with the liquid inlet end of the erosion experimental device, and the liquid inlet end of the liquid inlet pipe is arranged in the liquid container;

the liquid inlet end of the liquid outlet pipe is connected with the liquid outlet end of the erosion experimental device, and the liquid outlet end of the liquid outlet pipe is arranged in the liquid container;

the liquid outlet end of the liquid adding pipe is arranged in the liquid container, and the liquid adding port of the liquid adding pipe is used for adding a solution used in an erosion experiment;

the liquid inlet end of the liquid discharge pipe is arranged at the bottom of the liquid container, and the liquid discharge port of the liquid discharge pipe is used for discharging the solution in the liquid container.

3. The automatic liquid changing device based on the buffer material erosion test according to claim 1, wherein the detection device specifically comprises:

a turbidity detecting means and a conductivity detecting means;

the detection part of the turbidity detection device is arranged in the liquid container, and the turbidity detection device is used for detecting the turbidity of the solution in the liquid container;

the detection part of the conductivity detection device is arranged in the liquid container, and the conductivity detection device is used for detecting the conductivity of the solution in the liquid container.

4. The automatic liquid changing device based on the buffer material erosion test according to claim 2, further comprising:

a liquid collecting device;

and the liquid discharge port of the liquid discharge pipe is arranged in the liquid collecting device, and the liquid collecting device is used for collecting the solution discharged from the liquid container.

5. The automatic liquid changing device based on the buffer material erosion test is characterized in that the liquid collecting device specifically comprises:

a liquid collecting tank and a heating device;

the liquid discharge port of the liquid discharge pipe is arranged in the liquid collection box, the heating device is positioned in the liquid collection box, and the heating device is used for heating and evaporating the solution in the liquid collection box.

6. The automatic liquid changing device based on the buffer material erosion test of claim 1, further comprising:

a stirrer;

the stirring part of the stirrer is arranged in the liquid container, and the stirrer is used for stirring the liquid in the liquid container.

7. An automatic liquid changing method based on a buffer material erosion test is applied to the automatic liquid changing device based on the buffer material erosion test, which is characterized by comprising the following steps:

acquiring timing time; the timing time is the time for controlling the opening and closing of the timing valve;

switching the liquid-changing subsystem for carrying out the erosion experiment according to the timing time, and carrying out liquid-changing operation on the liquid-changing subsystem before switching when the switched liquid-changing subsystem carries out the erosion experiment;

judging whether a liquid change stopping operation instruction is received or not; if receiving the instruction, stopping the liquid changing operation; and if the command is not received, returning to the step of switching the liquid changing subsystem for carrying out the erosion experiment according to the timing time, and carrying out liquid changing operation on the liquid changing subsystem before switching when the switched liquid changing subsystem carries out the erosion experiment.

8. The automatic liquid changing method based on the buffer material erosion test as claimed in claim 7, wherein before the switching the liquid changing subsystem for conducting the erosion test according to the timing time, further comprising:

opening a liquid adding timing valve in the current liquid changing subsystem, adding a solution used in an erosion experiment into a liquid container in the current liquid changing subsystem, and starting timing;

closing the liquid adding timing valve in the current liquid changing subsystem after the preset liquid adding time is exceeded;

opening a liquid inlet timing valve in the current liquid changing subsystem and a liquid outlet timing valve in the current liquid changing subsystem;

the stirrer in the current liquid changing subsystem stirs the solution in the liquid container in the current liquid changing subsystem according to preset stirring time, and the detection device in the current liquid changing subsystem detects solution parameters according to preset detection time.

9. The automatic liquid switching method based on the buffer material erosion test of claim 8, wherein the switching of the liquid switching subsystem for the erosion test is performed according to the timing time, and the liquid switching operation is performed on the liquid switching subsystem before switching when the switched liquid switching subsystem performs the erosion test, specifically comprising:

opening a liquid adding timing valve of the subsystem to be switched according to the timing time, starting timing, and closing the liquid adding timing valve of the subsystem to be switched after the preset liquid adding time is exceeded;

closing a liquid inlet timing valve in the current liquid changing subsystem and a liquid outlet timing valve in the current liquid changing subsystem according to the timing time, and simultaneously opening a liquid inlet timing valve of the subsystem to be switched and a liquid outlet timing valve of the subsystem to be switched;

a stirrer in the subsystem to be switched stirs the solution in the liquid container in the subsystem to be switched according to the preset stirring time, and a detection device in the subsystem to be switched detects the solution parameters according to the preset detection time;

and opening a liquid drainage timing valve in the current liquid changing subsystem and starting timing, and closing the liquid drainage timing valve in the current liquid changing subsystem after the preset liquid drainage time is exceeded.

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