CN110130986A - A test device and test method based on a double-ended water stopper - Google Patents

Abstract

The invention discloses a test device and a test method based on a double-end water stopper, belonging to the technical field of double-end water stopper testing. The device of the invention includes a water passing device and an intelligent display and control device. The invention can monitor the situation of blockage and leakage of water pressure in real time, automatically maintain the pressure within a predetermined range, record the amount of water loss during water injection, and transmit data such as water pressure and flow through the data interface, so as to achieve full intelligence and reduce manpower The input improves the accuracy of monitoring data. The invention integrates the plugging and water injection leakage structure into one box, which is easy to carry and place, and can also play the role of underground explosion protection; the intelligent control device is used to effectively maintain the pressure inside the airbag , to prolong the service life of the air bag; adopt the design of separating the plugging pipeline and the water injection leakage pipeline, maintain the water pressure in the pipeline more stably, and meet the application of on-site engineering.

Description

A test device and test method based on a double-ended water stopper

technical field

The invention belongs to the technical field of double-end water stopper testing, and in particular relates to a test device and a test method based on a double-end water stopper.

Background technique

Choose a suitable observation place around the coal mining face in the coal mine. Drilling holes above the empty area. The borehole avoids the caving zone and obliquely penetrates the water-conducting fracture zone to reach a certain height above the expected top boundary of the water-conducting fracture zone. Use a double-ended water stopper to block and inject water in sections along the borehole, and measure the leakage flow rate of each section of the borehole to understand the cracking and loosening of the rock and determine the upper boundary height of the water-conducting fracture zone.

The double-ended water stopper is the main equipment for segmental water injection observation of downhole uphole, it includes observation platform, in-hole test system and test auxiliary equipment; the observation platform is composed of flow test instrument, pressure gauge, manual adjustment valve, etc.; The test system consists of a double-ended double-way water stopper, a pressure-resistant hose, and a push rod. The test auxiliary equipment also includes a timer and a set of special tools. There are two interconnected capsules at both ends of the double-ended double-way water blocking device, which are usually in a static contraction state and are cylindrical. They can be pushed to any depth of the drill hole with a drill pipe or a human push rod. The capsules swell and inject water into the hole. It is accomplished through two independent pipelines. Press water or inflate the capsule through a small-diameter pressure-resistant hose, a pressure-regulating valve and an indicating instrument, so that the capsules at both ends of the probe can expand into an ellipsoidal plug at the same time, forming a double-ended tube with a certain length (designed to be 1m) in the borehole. Plug the hole section.

Through the drill pipe or manpower hollow push rod (also used as water injection pipeline), pressure regulating valve and pressure flow meter to inject water at constant pressure into the blocked hole section, the amount of water injected into the hole section per unit time and leaked through the cracks of the hole wall can be measured.

However, this equipment is all manually operated, and the operation is relatively cumbersome, which will inevitably waste manpower and cause large errors.

Therefore, some researchers invented the intelligent digital display control device for double-ended water blocking device (CN203321492U). This practical solution can monitor the water pressure and leakage water pressure of the sealing capsule in real time, and intelligently adjust the pressure.

However, this scheme does not consider the one-to-one correspondence between time and water loss. To measure the water loss within a certain period of time still requires manual records, and the error is large. In this scheme, the plugging and water injection leakage share a pipeline, which cannot meet the on-site plugging 1. Water injection leakage is connected to separate pipelines; the pipeline interface of this scheme is a common interface. When the pressure is too high, the interface is easy to leak or even fall off, which will affect the monitoring results.

Existing equipment needs to be manually operated and recorded, and the operation is cumbersome, which will inevitably waste manpower and cause large errors.

Contents of the invention

Aiming at the above-mentioned technical problems existing in the prior art, the present invention proposes a testing device and testing method based on a double-ended water stopper, which has a reasonable design, overcomes the deficiencies of the prior art, and has good results.

In order to achieve the above object, the present invention adopts the following technical solutions:

A test device based on a double-ended water stopper, including a water passing device and an intelligent display and control device;

The water passing device includes the water inlet pipeline, which has two main roads, and the two main roads are equipped with three-way switches;

The first main road is provided with a water injection port, and the first main road is connected with two branch roads through a three-way switch; the end of one of the branch roads is provided with a leakage water pressure regulating outlet. When the water pressure is too high, the leakage water pressure The regulating outlet is opened for water release and pressure relief; the other branch is the leakage water injection pipeline, which is used to inject water into the plugged hole section, and is equipped with a pressure sensor and a flow sensor for real-time monitoring of the water pressure, The flow rate and flow rate change; there is a water release switch near the end of the leakage water injection pipeline, which is used to release water and pressure relief after the monitoring is completed; there is a mine hose water injection interface at the end of the leakage water injection pipeline, which is used to connect the mine hose;

The second trunk road is provided with a plugging capsule water inlet, and the second trunk road is connected with two branch roads through a three-way switch; the end of one of the branch roads is provided with a plugging capsule water pressure adjustment outlet, when the water pressure in the capsule When the water pressure is too high, the water pressure regulating outlet of the plugging capsule is opened to release water and relieve pressure; the other branch is the capsule plugging pipeline, which is used to inject water into the capsule to make the capsule bulge to form a plugging hole section, on which A pressure sensor is installed to monitor the water pressure of the capsule in real time; a water release switch is installed near the end of the capsule sealing pipeline to release water and release pressure after monitoring; a mining rubber hose is installed at the end of the capsule sealing pipeline The plugging interface is used to connect the mining hose;

Intelligent display and control device, including LED display unit, data output port, single-chip microcomputer, data input port, power supply and timer; LED display unit includes water loss pressure gauge, time display, water loss meter and sealing capsule pressure gauge, water loss Manometer, time display, water loss meter and plugging capsule manometer are respectively connected to the data input port and power supply through lines; the single-chip microcomputer is the control center, respectively connected to the data output port, three-way switch, pressure sensor, data input port, timing The meter and the flow sensor are connected through the line; the power supply is respectively connected with the timer, the pressure sensor, the flow sensor and the three-way switch through the line; the timer is used to record the monitoring time. When the predetermined time is reached, the timing stops. The change data is output from the data output port.

Preferably, the whole device is wrapped with a shell to play the role of explosion-proof downhole, and it is easy to carry and place.

In addition, the present invention also mentions a test method based on a double-ended water stopper, which uses the above-mentioned test device based on a double-ended water stopper, and specifically includes the following steps:

Step 1: Start the device; specifically include the following steps:

Step 1.1: Turn on the power, make sure that the power is sufficient and there is no water leakage in the pipeline, adjust the three-way switch on the two main roads, make the channel connected to the leakage water pressure adjustment outlet and the plugging capsule water pressure adjustment outlet be in a closed state, and connect The channel of the leaking water injection pipeline and the capsule plugging pipeline is open;

Step 1.2: Enter the water pressure value at the data input port that can make the capsule bulge enough to block the drill hole. The value is 0.6MPa. To prevent the capsule from bursting, set the threshold to 1MPa. In the same way, input the working water pressure of the water injection pipeline, the value is also 0.6MPa, and the leakage water pressure gauge can be displayed synchronously;

Step 1.3: Enter the timer monitoring time, which is 1 minute;

Step 1.4: Input the data information in step 1.2 and step 1.3 into the single-chip microcomputer;

Step 1.5: Connect the water injection port and block the water inlet of the capsule with the external water source pipeline;

Step 2: inject water into the capsule, control the water pressure of the capsule, and form a plugged hole section; specifically, the following steps are included:

Step 2.1: Turn on the water source switch connected to the water inlet of the blocking capsule. At this time, because the channel connecting the three-way switch to the capsule blocking pipeline is open, a path is formed, and the water flows through the pressure sensor, which inputs the water pressure information to the In single chip microcomputer;

Step 2.2: After the single-chip microcomputer processes the water pressure information, the water flow flows out from the sealing interface of the mining rubber hose, and the water flow passes through the blocked high-pressure pipeline to gradually fill up the capsule; when the pressure sensor senses that the water pressure reaches 0.6MPa, the single-chip microcomputer Control the three-way switch to close the channel connected to the capsule sealing pipeline; if the pressure sensor senses that the water pressure is greater than 1MPa, the single-chip microcomputer controls the three-way switch to open the channel connected to the water pressure adjustment outlet of the sealing capsule, and the water is discharged. until the water pressure is less than 1MPa, the single-chip microcomputer controls the three-way switch to close the channel connected to the water pressure adjustment outlet of the plugging capsule and the capsule plugging pipeline. Block the water source switch of the water inlet of the capsule;

Step 3: Inject water into the drill pipe and monitor the water loss; specifically, the following steps are included:

Step 3.1: Turn on the water source switch connected to the water injection port. At this time, because the channel of the three-way switch connected to the leaked water injection pipeline is open, a path is formed, and the water flows through the pressure sensor and flow sensor. Input the water pressure and flow information into the single chip microcomputer;

Step 3.2: After the single-chip microcomputer processes the water pressure and flow information, the water flows out from the water injection interface of the mining rubber hose, and the water flows through the drill pipe through the water injection high-pressure pipeline, and is injected into the plugged hole section in the probe in the hole; When the water pressure gauge shows that the water pressure exceeds 0.6MPa, the single-chip microcomputer controls the three-way switch to open the channel connected to the leakage water pressure adjustment outlet, and the water is released to release the pressure to 0.6MPa. When the water pressure remains stable, the timer starts the test task , and record the flow data, the time display and the water loss meter are displayed synchronously, and the single-chip microcomputer saves these data in real time. After one minute, the timer stops counting, the single-chip microcomputer stops data storage, and the first test ends;

Step 4: Release the water and release the pressure, and proceed to the next test; the specific steps are as follows:

Step 4.1: After the first test, turn off the water source switch, turn on the waterproof switch of the capsule to block the pipeline, let the water in the capsule flow out, and at the same time turn on the water release switch of the leaked water injection pipeline to release the water in the pipeline;

Step 4.2: Start the drilling machine to advance the test device in the hole by 1m;

Step 4.3: Repeat steps 1-3, test and record until all tests are completed;

Step 4.4: After the entire test process is over, use an external collector to export each recorded flow value from the data output port.

Beneficial technical effects brought by the present invention:

The invention can monitor the situation of blockage and leakage of water pressure in real time, automatically maintain the pressure within a predetermined range, record the amount of water loss during water injection, and transmit data such as water pressure and flow through the data interface, so as to achieve full intelligence and reduce manpower The investment has improved the accuracy of monitoring data, as follows:

1. Using the intelligent display and control device as the control device of the double-ended water stopper avoids the trouble caused by manual control and the error caused by human reading, and improves the data accuracy;

2. It can monitor and record the amount of water loss within the predetermined time, reducing the error of human records;

3. The control device adopts mining rubber hose;

3. The plugging and water injection leakage structures are integrated into one box, which is easy to carry and place, and can also play the role of underground explosion protection;

4. Use the intelligent control device to effectively maintain the pressure in the airbag and prolong the service life of the airbag;

5. Adopt the design of separating the plugging pipeline and the water injection leakage pipeline, maintain the water pressure in the pipeline more stably, and meet the application of on-site engineering.

Description of drawings

Figure 1 is a schematic diagram of the appearance of the intelligent digital display control device of the double-ended water stopper.

Figure 2 is a structural schematic diagram of an intelligent digital display control device for a double-ended water stopper.

Fig. 3 is a panoramic schematic diagram of an intelligent digital display control double-ended water blocking device testing system.

Figure 4 is a circuit diagram of the sensor.

Among them, 1-water injection port; 2-blocking capsule water inlet; 3-handle; 4-shell; 5-leakage hydraulic pressure adjustment outlet; Time display; 9-water loss meter; 10-blocking capsule pressure gauge; 11-water injection pipe outlet; 12-blocking capsule water outlet; 13-mine hose water injection interface; 14-mine hose plugging interface; 15 -data output port; 16-microcontroller; 17-three-way switch; 18-sensor and intelligent switch shell; 19-pressure sensor; 20-data input port; 21-power supply; 22-timer; 23-flow sensor; 24- Water release switch; 25-water injection high-pressure pipeline; 26-blocking high-pressure pipeline; 27-drilling machine; 28-drill pipe; 29-capsule; 30-hole probe.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

Example 1:

A test device based on a double-ended water stopper, as shown in Figure 1-4, including a water passing device and an intelligent display and control device;

The water passing device includes a water inlet pipeline, and the water inlet pipeline has two main roads, and the two main roads are all provided with a three-way switch 22;

The first main road is provided with a water injection port 1, and the first main road is connected with two branch roads through a three-way switch 17; the end of one of the branch roads is provided with a leakage water pressure regulating outlet 5, and when the water pressure is too high, Open the leakage water pressure regulating outlet 5, release water and release the pressure; the other branch is the leakage water injection pipeline, which is used to inject water into the plugged hole section, and is provided with a pressure sensor 19 and a flow sensor 23 on it for real-time monitoring of the flow rate here. Changes in water pressure, flow rate and flow rate; a water discharge switch 24 is provided near the end of the leakage water injection pipeline for releasing water and pressure relief after monitoring; a mine rubber hose water injection interface 13 is provided at the end of the leakage water injection pipeline for Connect mine hose;

The second trunk road is provided with a plugging capsule water inlet 2, and the second trunk road is connected with two branch roads through a three-way switch 17; When the water pressure in 29 is too high, open the plugging capsule water pressure adjustment outlet 6, release water and release the pressure; the other branch is the capsule plugging pipeline, which is used to inject water into the capsule 29, so that the capsule 29 bulges to form a plugging hole section, on which a pressure sensor 19 is arranged for real-time monitoring of the water pressure of the capsule; a water release switch 24 is arranged at a position close to the end of the capsule sealing pipeline, which is used for discharging water and releasing pressure after the monitoring; The end is provided with a mine hose plugging interface 14 for connecting the mine hose;

Intelligent display and control device, including LED display unit, data output port 15, single-chip microcomputer 16, data input port 20, power supply 21 and timer 22; Blocking capsule pressure gauge 10, leakage water pressure gauge 7, time display 8, leakage water meter 9 and blocking capsule pressure gauge 10 are respectively connected with data input port 20 and power supply 21 by lines; Data output port 15, three-way switch 17, pressure sensor 19, data input port 20, timer 22 and flow sensor 23 are connected; power supply 21 is connected with timer 22, pressure sensor 19, flow sensor 23 and three-way switch 17 through lines ; The timer 22 is used to record the monitoring time. When the predetermined time is reached, the timing stops, and the flow change data is output from the data output port 15 during this period of time.

The whole device is wrapped with the shell 4, which plays the role of underground explosion protection, and is easy to carry and place.

Example 2:

On the basis of the above-mentioned embodiment 1, the present invention also mentions a test method based on a double-ended water stopper, which specifically includes the following steps:

Step 1: Start the device;

Turn on the system power supply 21 to ensure sufficient electricity and no water leakage in the pipeline, adjust the three-way switch 17 on the two main roads, so that the passage connected to the leakage water pressure adjustment outlet 5 and the plugging capsule water pressure adjustment outlet 6 is closed. The channel connecting the leaking water injection pipeline and the capsule plugging pipeline is in an open state, and then input the water pressure value that can make the capsule 29 bulge enough to block the borehole at the data input port 20, and the value is 0.6MPa. 29 burst, set the threshold to 1MPa, the plugging capsule pressure gauge 10 can be displayed synchronously, similarly, input the working water pressure of the water injection pipeline, the value is also 0.6MPa, and the leakage water pressure gauge 7 can be displayed synchronously, finally, input The timer monitoring time is 1 minute, and the information will be transmitted to the single-chip microcomputer 16; then the external water source pipelines are used to connect the water injection port 1 and the capsule water inlet 2 respectively.

Step 2: inject water into the capsule, control the water pressure of the capsule, and form a plugged hole segment;

Open the water source switch connected to the water inlet 2 of the plugging capsule. At this time, because the passage of the three-way switch 17 connected to the capsule blocking pipeline is opened, a path is formed, and the water flow flows through the pressure sensor 19, which will transmit the water pressure information. Into the single-chip microcomputer 16, and finally, the water flow will flow out from the plugging interface 14 of the mining rubber hose, and the capsule 29 will be gradually filled and bulged by blocking the high-pressure pipeline. When the pressure sensor 19 senses that the water pressure reaches 0.6MPa, the single-chip microcomputer 16 It will control the three-way switch 17 and the channel of the capsule plugging pipeline to close. If the pressure sensor 19 senses that the water pressure is greater than 1MPa, the single-chip microcomputer 16 controls the three-way switch 17 to make it connect to the channel connected to the water pressure regulating outlet 6 of the plugging capsule. Open, release water and release pressure, until water pressure is less than 1MPa, single-chip microcomputer 16 controls three-way switch 17, makes the passage that links to each other with plugging capsule water pressure mediation outlet 6, capsule plugging pipeline close, and at this moment, capsule 29 is drilling Form the plugging hole segment inside, and close the water source switch connected to the water inlet 2 of the plugging capsule.

Step 3: inject water into the drill pipe and monitor the water loss;

Turn on the water source switch connected to the water injection port 1. At this time, because the channel of the three-way switch 17 connected to the leakage water injection pipeline is opened, a passage is formed, and the water flows through the pressure sensor 19 and the flow sensor 23, which will reduce the water pressure in the pipeline. 1. The flow information is transmitted to the single-chip microcomputer 16, and the water flow will flow out from the water injection interface 13 of the mining rubber hose, flow through the drill pipe 28 through the water injection high-pressure pipeline 25, and finally inject it into the plugged hole section in the in-hole probe 30. When the pressure gauge 7 shows that the water pressure exceeds 0.6MPa, the single-chip microcomputer 16 controls the three-way switch 17, so that the channel connected to the leakage water pressure adjustment outlet 5 is opened, and the water is released to release the pressure to 0.6MPa. After the water pressure remains stable, the timer 22 Start the test task, and record the flow data, the time display 8 and the water loss meter 9 synchronous digital display, and the single-chip microcomputer 16 saves these data in real time, after one minute, the timer 22 suspends timing, the single-chip microcomputer 16 stops data preservation, and the first test Finish.

Step 4: Drain the water and release the pressure, and proceed to the next test;

After the first test, turn off the water source switch, first open the waterproof switch 24 of the capsule blocking pipeline, so that the water in the capsule 29 li flows out, and simultaneously open the water discharge switch 24 of the leaking water injection pipeline, and release the water in the pipeline, then Start the drilling rig 27 to make the test device in the hole 1m deeper, then test and record according to the same steps. After the entire testing process is over, use an external collector to export each recorded flow value from the data output port 15 .

Of course, the above descriptions are not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or replacements made by those skilled in the art within the scope of the present invention shall also belong to the present invention. protection scope of the invention.

Claims (3)

1. A test device based on a double-ended water stopper, characterized in that: it includes a water passing device and an intelligent display and control device; The water passing device includes the water inlet pipeline, which has two main roads, and the two main roads are equipped with three-way switches; The first main road is provided with a water injection port, and the first main road is connected with two branch roads through a three-way switch; the end of one of the branch roads is provided with a leakage water pressure regulating outlet. When the water pressure is too high, the leakage water pressure The regulating outlet is opened for water release and pressure relief; the other branch is the leakage water injection pipeline, which is used to inject water into the plugged hole section, and is equipped with a pressure sensor and a flow sensor for real-time monitoring of the water pressure, The flow rate and flow rate change; there is a water release switch near the end of the leakage water injection pipeline, which is used to release water and pressure relief after the monitoring is completed; there is a mine hose water injection interface at the end of the leakage water injection pipeline, which is used to connect the mine hose; The second trunk road is provided with a plugging capsule water inlet, and the second trunk road is connected with two branch roads through a three-way switch; the end of one of the branch roads is provided with a plugging capsule water pressure adjustment outlet, when the water pressure in the capsule When the water pressure is too high, the water pressure regulating outlet of the plugging capsule is opened to release water and relieve pressure; the other branch is the capsule plugging pipeline, which is used to inject water into the capsule to make the capsule bulge to form a plugging hole section, on which A pressure sensor is installed to monitor the water pressure of the capsule in real time; a water release switch is installed near the end of the capsule sealing pipeline to release water and release pressure after monitoring; a mining rubber hose is installed at the end of the capsule sealing pipeline The plugging interface is used to connect the mining hose; Intelligent display and control device, including LED display unit, data output port, single-chip microcomputer, data input port, power supply and timer; LED display unit includes water loss pressure gauge, time display, water loss meter and sealing capsule pressure gauge, water loss Manometer, time display, water loss meter and plugging capsule manometer are respectively connected to the data input port and power supply through lines; the single-chip microcomputer is the control center, respectively connected to the data output port, three-way switch, pressure sensor, data input port, timing The meter and the flow sensor are connected through the line; the power supply is respectively connected with the timer, the pressure sensor, the flow sensor and the three-way switch through the line; the timer is used to record the monitoring time. When the predetermined time is reached, the timing stops. The change data is output from the data output port. 2. The test device based on the double-ended water stopper according to claim 1, characterized in that: the whole device is wrapped with a casing to play the role of underground explosion-proof, and it is easy to carry and place. 3. A test method based on a double-ended water stopper, characterized in that: adopt a kind of test device based on a double-ended water stopper as claimed in claim 1, specifically comprising the steps: Step 1: Start the device; specifically include the following steps: Step 1.1: Turn on the power, make sure that the power is sufficient and there is no water leakage in the pipeline, adjust the three-way switch on the two main roads, make the channel connected to the leakage water pressure adjustment outlet and the plugging capsule water pressure adjustment outlet be in a closed state, and connect The channel of the leaking water injection pipeline and the capsule plugging pipeline is open; Step 1.2: Enter the water pressure value at the data input port that can make the capsule bulge enough to block the drill hole. The value is 0.6MPa. To prevent the capsule from bursting, set the threshold to 1MPa. In the same way, input the working water pressure of the water injection pipeline, the value is also 0.6MPa, and the leakage water pressure gauge can be displayed synchronously; Step 1.3: Enter the timer monitoring time, which is 1 minute; Step 1.4: Input the data information in step 1.2 and step 1.3 into the single-chip microcomputer; Step 1.5: Connect the water injection port and block the water inlet of the capsule with the external water source pipeline; Step 2: inject water into the capsule, control the water pressure of the capsule, and form a plugged hole section; specifically, the following steps are included: Step 2.1: Turn on the water source switch connected to the water inlet of the blocking capsule. At this time, because the channel connecting the three-way switch to the capsule blocking pipeline is open, a path is formed, and the water flows through the pressure sensor, which inputs the water pressure information to the In single chip microcomputer; Step 2.2: After the single-chip microcomputer processes the water pressure information, the water flow flows out from the sealing interface of the mining rubber hose, and the water flow passes through the blocked high-pressure pipeline to gradually fill up the capsule; when the pressure sensor senses that the water pressure reaches 0.6MPa, the single-chip microcomputer Control the three-way switch to close the channel connected to the capsule sealing pipeline; if the pressure sensor senses that the water pressure is greater than 1MPa, the single-chip microcomputer controls the three-way switch to open the channel connected to the water pressure adjustment outlet of the sealing capsule, and release water to release pressure , until the water pressure is less than 1MPa, the single-chip microcomputer controls the three-way switch to close the channel connected to the water pressure adjustment outlet of the plugging capsule and the capsule plugging pipeline. Block the water source switch of the water inlet of the capsule; Step 3: Inject water into the drill pipe and monitor the water loss; specifically, the following steps are included: Step 3.1: Turn on the water source switch connected to the water injection port. At this time, because the channel of the three-way switch connected to the leaked water injection pipeline is open, a passage is formed, and the water flows through the pressure sensor and flow sensor. Input the water pressure and flow information into the single chip microcomputer; Step 3.2: After the single-chip microcomputer processes the water pressure and flow information, the water flows out from the water injection interface of the mining rubber hose, and the water flows through the drill pipe through the water injection high-pressure pipeline, and is injected into the plugged hole section in the probe in the hole; When the water pressure gauge shows that the water pressure exceeds 0.6MPa, the single-chip microcomputer controls the three-way switch to open the channel connected to the leakage water pressure adjustment outlet, and the water is released to release the pressure to 0.6MPa. When the water pressure remains stable, the timer starts the test task. And record the flow data, the time display and the water loss meter are displayed synchronously, and the single-chip microcomputer saves these data in real time. After one minute, the timer pauses, the single-chip microcomputer stops data storage, and the first test is over; Step 4: Release the water and release the pressure, and proceed to the next test; the specific steps are as follows: Step 4.1: After the first test, turn off the water source switch, turn on the waterproof switch of the capsule to block the pipeline, let the water in the capsule flow out, and at the same time turn on the water release switch of the leaked water injection pipeline to release the water in the pipeline; Step 4.2: Start the drilling machine to advance the test device in the hole by 1m; Step 4.3: Repeat steps 1-3, test and record until all tests are completed; Step 4.4: After the entire test process is over, use an external collector to export each recorded flow value from the data output port.