An automated fluid replacement device and method based on erosion testing of buffer materials

Abstract

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

Description

Technical Field

[0001] The invention relates to the technical field of performance test of buffer materials for geological disposal of high-level radioactive waste, and in particular to an automatic liquid replacement device and method based on buffer material erosion test. Background Art

[0002] Groundwater is the carrier of high-level radioactive waste leakage to the external space of the disposal repository. Buffer materials, as the last artificial barrier filled between the waste tank and the geological body, play an important role as a hydraulic barrier, blocking groundwater (which may contain corrosive substances) from flowing to the surface of the waste tank, and blocking the leakage of water-soluble compounds and nuclides in the waste tank into the surrounding rock. A large number of studies have shown that bentonite is a suitable base material for buffer materials, so it is necessary to understand the erosion characteristics of bentonite under different solution conditions.

[0003] The erosion experiment of bentonite requires not only manual measurement of the parameters of the solution, including turbidity and conductivity, but also the change of the solution from time to time. The existing equipment is relatively scattered, and each change of the solution and the measurement of its turbidity and conductivity are time-consuming and laborious. Summary of the invention

[0004] The object of the present invention is to provide an automatic liquid replacement device and method based on a buffer material erosion test, which can realize automatic measurement of solution parameters during the automatic liquid replacement process.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides an automatic liquid changing device based on a buffer material erosion test, comprising:

[0007] Multiple fluid replacement subsystems;

[0008] The liquid outlet port of each liquid replacement subsystem is connected to the liquid inlet port of the erosion experiment device; the liquid inlet port of each liquid replacement subsystem is connected to the liquid outlet port of the erosion experiment device; the erosion experiment device is built with a buffer material;

[0009] The liquid adding port of the liquid changing subsystem is used for adding the solution used for the erosion experiment to the 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 experiment device; the liquid inlet port of the liquid changing subsystem is used for flowing the erosion solution flowing out of the liquid outlet end of the erosion experiment device 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 the liquid changing subsystem performs liquid changing operation alternately according to the opening and closing state of the timing valve; the detection device in the liquid changing subsystem is used for detecting the parameters of the solution in the liquid container.

[0010] Optional,

[0011] The liquid replacement subsystem specifically comprises:

[0012] A liquid inlet pipe provided with a liquid inlet timing valve, a liquid outlet pipe provided with a liquid outlet timing valve, a liquid adding pipe provided with a liquid adding timing valve, a liquid discharge pipe provided with a liquid discharge timing valve, and a liquid container;

[0013] The liquid outlet port of the liquid inlet pipe is connected to the liquid inlet end of the erosion experimental device, and the liquid inlet end of the liquid inlet pipe is placed in the liquid container;

[0014] The liquid inlet port of the liquid outlet pipe is connected to 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;

[0015] The liquid outlet end of the liquid adding tube is placed in the liquid container, and the liquid adding port of the liquid adding tube is used to add the solution used in the erosion experiment;

[0016] 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 to discharge the solution in the liquid container.

[0017] Optionally, the detection device specifically includes:

[0018] Turbidity detection device and conductivity detection device;

[0019] 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;

[0020] 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.

[0021] Optionally, the automatic liquid replacement device further includes:

[0022] Liquid collecting device;

[0023] The liquid discharge port of the liquid discharge pipe is placed in the liquid collecting device, and the liquid collecting device is used to collect the solution discharged from the liquid container.

[0024] Optionally, the liquid collecting device specifically comprises:

[0025] Collecting tank and heating device;

[0026] The liquid discharge port of the liquid discharge pipe is placed in the liquid collecting tank, the heating device is located inside the liquid collecting tank, and the heating device is used to heat and evaporate the solution in the liquid collecting tank.

[0027] Optionally, the automatic liquid replacement device further includes:

[0028] Agitator;

[0029] 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.

[0030] The present invention also provides an automatic liquid replacement method based on a buffer material erosion test, which is applied to the automatic liquid replacement device based on a buffer material erosion test, comprising:

[0031] Obtaining a timing time; the timing time is the time for controlling the opening and closing of the timing valve;

[0032] Switching the liquid replacement subsystem for the erosion experiment according to the timing time, and performing a liquid replacement operation on the liquid replacement subsystem before the switching when the liquid replacement subsystem after the switching performs the erosion experiment;

[0033] Determine whether an instruction to stop the fluid replacement operation is received; if the instruction is received, stop the fluid replacement operation; if the instruction is not received, return to the step of "switching the fluid replacement subsystem for the erosion experiment according to the timing, and performing the fluid replacement operation on the fluid replacement subsystem before the switching when the fluid replacement subsystem after the switching performs the erosion experiment".

[0034] Optionally, before switching the liquid changing subsystem for performing the erosion experiment according to the timing time, the method further includes:

[0035] Open the liquid adding timing valve in the current liquid changing subsystem, add the solution used in the erosion experiment to the liquid container in the current liquid changing subsystem, and start timing;

[0036] After the preset liquid adding time has passed, closing the liquid adding timing valve in the current liquid changing subsystem;

[0037] Opening the liquid inlet timing valve in the current liquid replacement subsystem and the liquid outlet timing valve in the current liquid replacement subsystem;

[0038] The stirrer in the current liquid replacement subsystem stirs the solution in the liquid container in the current liquid replacement subsystem according to a preset stirring time, and the detection device in the current liquid replacement subsystem detects solution parameters according to a preset detection time.

[0039] Optionally, the switching of the liquid replacement subsystem for the erosion experiment according to the timing time, and performing a liquid replacement operation on the liquid replacement subsystem before the switching when the liquid replacement subsystem after the switching performs the erosion experiment, specifically includes:

[0040] Opening the liquid filling timing valve of the subsystem to be switched according to the timing time and starting timing, and closing the liquid filling timing valve of the subsystem to be switched after exceeding the preset liquid filling time;

[0041] According to the timing time, close the liquid inlet timing valve in the current liquid replacement subsystem and the liquid outlet timing valve in the current liquid replacement subsystem, and simultaneously open the liquid inlet timing valve and the liquid outlet timing valve of the subsystem to be switched;

[0042] 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;

[0043] The drain timing valve in the current liquid replacement subsystem is opened and timing is started, and the drain timing valve in the current liquid replacement subsystem is closed after the preset drain time is exceeded.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] The present invention proposes an automatic liquid replacement device and method based on a buffer material erosion test, the device comprising a plurality of liquid replacement subsystems; the liquid outlet port of each liquid replacement subsystem is connected to the liquid inlet end of the erosion experiment device; the liquid inlet port of each liquid replacement subsystem is connected to the liquid outlet end of the erosion experiment device; the liquid replacement subsystem is provided with a timing valve, and the liquid replacement subsystem performs liquid replacement operations alternately according to the opening and closing states of the timing valve; the detection device in the liquid replacement subsystem is used to detect the parameters of the solution in the liquid container, and can realize automatic measurement of the turbidity and conductivity of the solution during the automatic liquid replacement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0047] Figure 1 It is a structural diagram of the automatic liquid changing device based on the buffer material erosion test in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] The object of the present invention is to provide an automatic liquid replacement device and method based on a buffer material erosion test, which can realize automatic measurement of the turbidity and conductivity of the solution during the automatic liquid replacement process.

[0050] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] The present invention provides an automatic liquid changing device based on a buffer material erosion test, which includes a plurality of liquid changing subsystems. The liquid outlet port of each liquid changing subsystem is connected to the liquid inlet port of the erosion experiment device; the liquid inlet port of each liquid changing subsystem is connected to the liquid outlet port of the erosion experiment device; the erosion experiment device is equipped with a buffer material; the liquid adding port of the liquid changing subsystem is used to add the solution used for the erosion experiment to the liquid container in the liquid changing subsystem; the liquid outlet port of the liquid changing subsystem is used to discharge the solution in the liquid container into the liquid inlet end of the erosion experiment device; the liquid inlet port of the liquid changing 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 discharge port of the liquid changing subsystem is used to discharge the solution in the liquid container; the liquid changing subsystem is provided with a timing valve, and the liquid changing subsystem performs liquid changing operations alternately according to the opening and closing state of the timing valve; the detection device in the liquid changing subsystem is used to detect the parameters of the solution in the liquid container.

[0052] The liquid changing 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 adding pipe provided with a liquid adding timing valve, a liquid discharge pipe provided with a liquid discharge timing valve, and a liquid container. The liquid outlet port of the liquid inlet pipe (i.e., the liquid outlet port of the liquid changing subsystem) is connected to 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 inlet port of the liquid outlet pipe (i.e., the liquid inlet port of the liquid changing 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 adding pipe is placed in the liquid container, and the liquid adding port of the liquid adding pipe (i.e., the liquid adding port of the liquid changing subsystem) is used to add the solution used in the 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 (i.e., the liquid discharge port of the liquid changing subsystem) is used to discharge the solution in the liquid container.

[0053] The detection device specifically includes: a turbidity detection device and a 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.

[0054] The automatic liquid replacement device also includes a 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 to collect the solution discharged from the liquid container.

[0055] The liquid collecting device specifically comprises: a liquid collecting box and a heating device. The heating device is located inside the liquid collecting box and is used to heat and evaporate the solution in the liquid collecting box.

[0056] 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.

[0057] Taking the automatic liquid replacement device including two liquid replacement subsystems as an example, the device structure of the present invention is further explained. Figure 1 FIG. 1 is a structural diagram of an automatic liquid replacement device based on a buffer material erosion test in an embodiment of the present invention. Figure 1 As shown, an automatic liquid changing device for buffer material erosion test mainly includes: a liquid inlet pipe 1, a liquid adding pipe 2, a liquid outlet pipe 3, a liquid discharge pipe 4, turbidity probes 5 and 6, conductivity probes 7 and 8, agitators 9 and 10, liquid adding timing valves 11 and 12, liquid inlet timing valves 13 and 14, liquid outlet timing valves 15 and 16, liquid discharge timing valves 17 and 18, a liquid collecting box 19, and 500ml liquid containers 20 and 21.

[0058] The liquid inlet pipe 1 is connected with a three-way pipe joint, one end of which is connected to the installed liquid inlet pipe of the erosion experiment, and the other two ends are respectively connected to 500ml liquid 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 containers 20 and 21.

[0059] The liquid adding tube 2 is connected with a three-way pipe joint, one end of which is connected to the container of the solution required for the erosion experiment, and the other two ends are connected to 500ml liquid containers 20 and 21 respectively; the liquid adding timing valves 11 and 12 are installed on the liquid adding tube 2 leading to the 500ml liquid containers 20 and 21.

[0060] The liquid outlet pipe 3 is connected with a three-way pipe joint, one end of which is connected to the installed liquid outlet pipe of the erosion experiment, and the other two ends are respectively connected to 500ml liquid containers 20 and 21; the liquid outlet timing valves 15 and 16 are installed on the liquid outlet pipe 3 leading to the 500ml liquid containers 20 and 21.

[0061] The discharge pipe 4 is connected with a three-way pipe joint, one end of which is connected to the liquid collecting box 19, and the other two ends are respectively connected to 500ml liquid containers 20 and 21; the discharge timing valves 17 and 18 are installed on the discharge pipe 4 leading to the 500ml liquid containers 20 and 21.

[0062] Install the turbidity probe 5 and the conductivity probe 7 in the 500ml liquid container 20, and install the turbidity probe 6 and the conductivity probe 8 in the 500ml liquid container 21, and take sealing measures to prevent water leakage. Install the agitators 9 and 10 in the 500ml liquid containers 20 and 21 respectively, and adjust the agitators to a suitable position and height to prevent them from hitting the tubes and inner walls in the 500ml liquid containers 20 and 21 during rotation.

[0063] The present invention also provides an automatic liquid replacement method based on a buffer material erosion test, comprising:

[0064] Step 1: Get the timing time; the timing time is the time to control the opening and closing of the timing valve.

[0065] Open the liquid adding timing valve in the current liquid changing subsystem, add the solution used in the erosion experiment to the liquid container in the current liquid changing subsystem, and start timing;

[0066] After the preset liquid filling time has passed, the liquid filling timing valve in the current liquid replacement subsystem is closed;

[0067] Opening the liquid inlet timing valve in the current liquid replacement subsystem and the liquid outlet timing valve in the current liquid replacement subsystem;

[0068] The stirrer in the current liquid replacement subsystem stirs the solution in the liquid container in the current liquid replacement subsystem according to a preset stirring time, and the detection device in the current liquid replacement subsystem detects the solution parameters according to a preset detection time.

[0069] Step 2: Switch the liquid replacement subsystem for the erosion experiment according to the timing, and perform the liquid replacement operation on the liquid replacement subsystem before the switching when the liquid replacement subsystem after the switching performs the erosion experiment.

[0070] Step 2 specifically includes:

[0071] Open the liquid filling timing valve of the subsystem to be switched according to the timing time and start timing, and close the liquid filling timing valve of the subsystem to be switched after the preset liquid filling time exceeds;

[0072] According to the timing time, close the liquid inlet timing valve in the current liquid replacement subsystem and the liquid outlet timing valve in the current liquid replacement subsystem, and open the liquid inlet timing valve and the liquid outlet timing valve of the subsystem to be switched at the same time;

[0073] The stirrer in the subsystem to be switched stirs the solution in the liquid container in the subsystem to be switched according to a preset stirring time, and the detection device in the subsystem to be switched detects the solution parameters according to a preset detection time;

[0074] The drain timing valve in the current liquid replacement subsystem is opened and timing is started. After the preset drain time is exceeded, the drain timing valve in the current liquid replacement subsystem is closed.

[0075] Step 3: Determine whether a stop fluid replacement operation instruction is received; if an instruction is received, execute step 4; if no instruction is received, return to step 2.

[0076] Step 4: Stop the fluid replacement operation.

[0077] Taking the automatic liquid replacement device including two liquid replacement subsystems as an example, the method flow of the present invention is further explained. The method flow is based on Figure 1An automatic liquid changing method of an automatic liquid changing device, the method comprising:

[0078] (1) Connect the assembled erosion test device to the liquid inlet pipe 1 and the liquid outlet pipe 3;

[0079] (2) Connect the liquid adding tube 2 to the liquid container;

[0080] (3) Open the liquid filling timing valve 11, close all other valves, and inject 500 ml of the solution used in the erosion experiment into the 500 ml liquid container 20;

[0081] (4) Connect the turbidity probes 5 and 6, the conductivity probes 7 and 8, and the stirrers 9 and 10 to power supplies respectively.

[0082] (5) The liquid inlet timing valve 13 and the liquid outlet timing valve 15 are opened for 24 hours;

[0083] (6) The stirrer 9 is set to stir once every 30 minutes, and the turbidity probe 5 and the conductivity probe 7 are set to record once every 30 minutes;

[0084] (7) 23 hours later (i.e., 23 hours after the liquid inlet timing valve 13 and the liquid outlet timing valve 15 are opened), the liquid adding timing valve 12 is opened, 500 ml of the solution used in the erosion experiment is injected into the 500 ml liquid container 21, and then closed;

[0085] (8) 24 hours later (i.e., after the liquid inlet timing valve 13 and the liquid outlet timing valve 15 are opened for 24 hours), 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 are opened for 24 hours;

[0086] (9) The stirrer 10 is set to stir once every 30 minutes, and the turbidity probe 6 and the conductivity probe 8 are set to record once every 30 minutes;

[0087] (10) The drain timing valve 17 is opened, and the liquid collecting tank 19 starts heating and evaporating the 500 ml solution used for the erosion experiment flowing into the liquid container 20;

[0088] (11) After 1 hour (i.e., 1 hour after opening the drain timing valve 17), close the drain timing valve 17;

[0089] (12) 23 hours later (i.e., 23 hours after the liquid inlet timing valve 14 and the liquid outlet timing valve 16 were opened), the liquid adding timing valve 11 was opened, 500 ml of the solution used in the erosion experiment was injected into the 500 ml liquid container 20, and then closed;

[0090] (13) 24 hours later (i.e., after the liquid inlet timing valve 14 and the liquid outlet timing valve 16 have been opened for 24 hours), 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 for 24 hours;

[0091] (14) The discharge timing valve 18 is opened, and the liquid collecting tank 19 starts to heat and evaporate the 500 ml solution used for the erosion experiment flowing into the liquid container 21;

[0092] (15) One hour later (i.e., one hour after the drain timing valve 18 was opened), the drain timing valve 18 was closed, and the operation was cyclically repeated from step (7) until the entire erosion test was completed.

[0093] The automatic solution replacement method provided by the present invention reduces the influence of artificial time difference on the experimental test results by replacing the solution at equal intervals in the erosion experiment of bentonite.

[0094] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An automatic liquid changing device based on buffer material erosion test, characterized in that: include: Multiple fluid replacement subsystems; The liquid outlet port of each liquid changing subsystem is connected to the liquid inlet end of the erosion experiment device; the liquid inlet port of each liquid changing subsystem is connected to the liquid outlet end of the erosion experiment device; the erosion experiment device is equipped with a buffer material; the liquid adding port of the liquid changing subsystem is used to add the solution used for the erosion experiment to the liquid container in the liquid changing subsystem; the liquid outlet port of the liquid changing subsystem is used to discharge the solution in the liquid container into the liquid inlet end of the erosion experiment device; the liquid inlet port of the liquid changing 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 discharge port of the liquid changing subsystem is used to discharge the solution in the liquid container; the liquid changing subsystem is provided with a timing valve, and the liquid changing subsystem performs liquid changing operation alternately according to the opening and closing state of the timing valve; The detection device in the liquid replacement subsystem is used to detect the parameters of the solution in the liquid container; The liquid replacement subsystem specifically comprises: A liquid inlet pipe provided with a liquid inlet timing valve, a liquid outlet pipe provided with a liquid outlet timing valve, a liquid adding pipe provided with a liquid adding timing valve, a liquid discharge pipe provided with a liquid discharge timing valve, and a liquid filling container; the liquid outlet port of the liquid inlet pipe is connected to the liquid inlet end of the erosion experiment device, and the liquid inlet end of the liquid inlet pipe is placed in the liquid filling container; the liquid inlet port of the liquid outlet pipe is connected to the liquid outlet end of the erosion experiment device, and the liquid outlet end of the liquid outlet pipe is placed in the liquid filling container; the liquid outlet end of the liquid adding pipe is placed in the liquid filling container, and the liquid adding port of the liquid adding pipe is used to add the solution used for 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 to discharge the solution in the liquid filling container; The detection device specifically comprises: 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.

2. The automatic liquid replacement device based on the buffer material erosion test according to claim 1 is characterized in that: The automatic liquid replacement device further comprises: 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 to collect the solution discharged from the liquid container.

3. The automatic liquid replacement device based on the buffer material erosion test according to claim 2 is characterized in that: The liquid collecting device specifically comprises: Liquid collecting tank and heating device; The liquid discharge port of the liquid discharge pipe is placed in the liquid collecting tank, the heating device is located inside the liquid collecting tank, and the heating device is used to heat and evaporate the solution in the liquid collecting tank.

4. The automatic liquid replacement device based on the buffer material erosion test according to claim 1 is characterized in that: The automatic liquid replacement device further comprises: Agitator; the stirring part of the agitator is placed inside the liquid container, and the agitator is used to stir the liquid in the liquid container.

5. An automatic liquid replacement method based on a buffer material erosion test, applied to the automatic liquid replacement device based on a buffer material erosion test according to any one of claims 1 to 4, characterized in that: include: Get the timing time; The timing time is the time for controlling the opening and closing of the timing valve; Switching the liquid replacement subsystem for the erosion experiment according to the timing time, and performing a liquid replacement operation on the liquid replacement subsystem before the switching when the liquid replacement subsystem after the switching performs the erosion experiment; Determine whether a stop fluid replacement operation instruction is received; if an instruction is received, stop the fluid replacement operation; if no instruction is received, return to step "switching the fluid replacement subsystem for the erosion experiment according to the timing time, and performing a fluid replacement operation on the fluid replacement subsystem before the switching when the fluid replacement subsystem after the switching performs the erosion experiment".

6. The automatic liquid replacement method based on the buffer material erosion test according to claim 5, characterized in that: Before switching the liquid changing subsystem for the erosion experiment according to the timing time, the method further includes: Open the liquid adding timing valve in the current liquid changing subsystem, add the solution used in the erosion experiment to the liquid container in the current liquid changing subsystem, and start timing; After the preset liquid adding time has passed, closing the liquid adding timing valve in the current liquid changing subsystem; Opening the liquid inlet timing valve in the current liquid replacement subsystem and the liquid outlet timing valve in the current liquid replacement subsystem; The stirrer in the current liquid replacement subsystem stirs the solution in the liquid container in the current liquid replacement subsystem according to a preset stirring time, and the detection device in the current liquid replacement subsystem detects solution parameters according to a preset detection time.

7. The automatic liquid replacement method based on the buffer material erosion test according to claim 6, characterized in that: The switching of the liquid replacement subsystem for the erosion experiment according to the timing time, and performing a liquid replacement operation on the liquid replacement subsystem before the switching when the liquid replacement subsystem after the switching performs the erosion experiment, specifically includes: Opening the liquid filling timing valve of the subsystem to be switched according to the timing time and starting timing, and closing the liquid filling timing valve of the subsystem to be switched after exceeding the preset liquid filling time; According to the timing time, close the liquid inlet timing valve in the current liquid replacement subsystem and the liquid outlet timing valve in the current liquid replacement subsystem, and simultaneously open the liquid inlet timing valve and the liquid outlet timing valve of the subsystem to be switched; 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; The drain timing valve in the current liquid replacement subsystem is opened and timing is started, and the drain timing valve in the current liquid replacement subsystem is closed after the preset drain time is exceeded.

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