Intelligent drainage system for positive pressure water feeding of duplex pump house

Abstract

The application provides a double-pump house positive pressure water feeding intelligent drainage system, which comprises a lower pump house unit, an upper pump house unit, a pipeline system, a valve unit, a detection unit and a controller; the lower pump house unit is located above a water distribution well; the upper pump house unit is located above a mine tunnel; the pipeline system is located in the lower pump house unit, the upper pump house unit, the water distribution well and a passageway; the valve unit is installed on the pipeline system; and the detection unit is installed on the upper pump house unit, the lower pump house unit, the three water distribution wells and the pipeline system. The application also provides a water inflow measurement method, which comprises calibrating a water sump by using a water level calibration method, obtaining total drainage capacity of the double-pump house positive pressure water feeding intelligent drainage system, and obtaining total water inflow of a mine. The double-pump house positive pressure water feeding intelligent drainage system and the water inflow measurement method have the characteristics of high control precision, good safety and real-time performance, fast response speed and high efficiency, and can be widely applied to the field of mining.

Description

TECHNICAL FIELD

[0001] The present application relates to mine rescue drainage technology, in particular to a double-pump house positive pressure water feeding intelligent drainage system and a water inflow calculation method. BACKGROUND

[0002] The coal mine underground drainage system is an essential part of the coal mining process, and the coal mine underground water has the characteristics of large instantaneous water inflow, strong suddenness and high hazard. Coal mine water leakage accidents occur frequently, and the water damage accident rate and mortality rate are the main disasters next to gas accidents.

[0003] In actual production, due to the size limitation of the coal mine water distribution well, the existing coal mine underground drainage system mostly uses a suction type horizontal centrifugal pump drainage system, and the pump house installation height is usually consistent with the height of the coal mine underground roadway. Before starting the horizontal centrifugal pump, the pump needs to be primed first, that is, the horizontal centrifugal pump uses a negative pressure water suction method. The negative pressure water suction method often accompanies the occurrence of cavitation and air pocket phenomena, which greatly reduces the service life of the horizontal centrifugal pump. At the same time, when a sudden water inflow event occurs, once the pump house is flooded, the drainage system will be completely paralyzed and cannot continue to drain. At this time, the equipment cannot be removed, and the staff cannot escape in time, causing serious safety accidents. In view of this, how to solve the safety and reliability of the drainage when the coal mine sudden water inflow occurs, and win the golden time for rescue drainage, is the main technical problem faced by coal mine drainage rescue.

[0004] Therefore, in the prior art, there is no double-pump house positive pressure water feeding intelligent drainage system and water inflow calculation method with high control accuracy, high safety, high reliability, fast rescue drainage response speed and high rescue drainage efficiency. SUMMARY

[0005] Therefore, the main purpose of the present application is to provide a double-pump house positive pressure water feeding intelligent drainage system and water inflow calculation method with high control accuracy, high safety, high reliability, fast rescue drainage response speed and high rescue drainage efficiency.

[0006] In order to achieve the above purpose, the first technical scheme of the present application is:

[0007] The application discloses a duplex pump house positive pressure water feeding intelligent drainage system, which comprises the following parts: a part for connecting a water distribution well through a water distribution well cover, connecting an upper pump house unit through a channel, and feeding water to a lower pump house unit of the upper pump house unit through a pipeline system under the drive of three pre-pumps according to control instructions sent by a controller; a part for installing three main drainage pumps and three main drainage motors, and draining water from the lower pump house unit to the outside of a mine through the three main drainage pumps under the drive of the three main drainage motors according to the control instructions sent by the controller; a part for connecting the three pre-pumps in the lower pump house unit, connecting the lower pump house unit and the upper pump house unit, and connecting the upper pump house unit and the pipeline system outside the mine; a valve unit for controlling the pipeline system to be on or off or controlling the flow rate according to the control instructions of the controller; a detection unit for sending the real-time water level of a first water distribution well, the real-time water level of a second water distribution well, the real-time water level of a third water distribution well, the real-time water level of the lower pump house, and the water flow rate of the pipeline system to the outside of the mine to the controller; a part for pre-setting a warning water level of the first water distribution well, a warning water level of the second water distribution well, a warning water level of the third water distribution well, and a warning water level of the lower pump house, comparing the real-time water level of the first water distribution well, the real-time water level of the second water distribution well, the real-time water level of the third water distribution well, and the real-time water level of the lower pump house sent by the detection unit with the warning water level of the first water distribution well, the warning water level of the second water distribution well, the warning water level of the third water distribution well, and the warning water level of the lower pump house; and a part for identifying faults of the first pre-pump and identifying mine water inrush; a controller for sending control instructions to the valve unit, the lower pump house unit and the upper pump house unit according to the comparison results, the fault identification results and the mine water inrush identification results and controlling according to an intelligent drainage strategy; wherein the water distribution well has three openings, the three water distribution wells, the three pre-pumps and the three pre-motors are in one-to-one correspondence, each pre-pump and the corresponding pre-motor are installed at the bottom of the corresponding water distribution well, the three main drainage pumps and the three main drainage motors are in one-to-one correspondence, and the three channels, the three pre-pumps and the three pre-motors are in one-to-one correspondence.

[0008] The lower pump house unit is located above the three water distribution wells; the upper pump house unit is located 4-5 meters above a mine roadway; the pipeline system is distributed in the lower pump house unit, the upper pump house unit, the three water distribution wells and the three channels; the valve unit is installed on the pipeline system; and the detection unit is installed on the upper pump house unit, the lower pump house unit, the three water distribution wells and the pipeline system.

[0009] In summary, the double-pump house positive pressure water feeding intelligent drainage system comprises three sets of positive pressure water feeding drainage pump groups: a first drainage pump group composed of a first pre-motor, a first pre-pump, a first main drainage motor, a first main drainage pump and corresponding pipelines, a second drainage pump group composed of a second pre-motor, a second pre-pump, a second main drainage motor, a second main drainage pump and corresponding pipelines, and a third drainage pump group composed of a third pre-motor, a third pre-pump, a third main drainage motor, a third main drainage pump and corresponding pipelines and an electric valve. The first drainage pump group is a working pump group, the second drainage pump group is a standby pump group, and the third drainage pump group is a maintenance pump group. In actual application, when water inrush occurs in the mine and the water volume is large, the three sets of pump groups can simultaneously perform drainage. When each set of drainage pump group performs drainage work, the pre-pump positively feeds water to the corresponding main drainage pump under the action of the pre-motor, rather than relying on the main drainage pump to perform drainage by negative pressure water suction. In this way, the height of the superimposed pump house can be increased, the lift of the main drainage pump can be increased, and the risk of water flooding of the main drainage pump and other equipment prone to damage due to water flooding can be greatly reduced. At the same time, the increase in the height of the main drainage pump also reduces the cavitation damage to the main drainage pump, thereby prolonging the service life of the main drainage pump. In addition, when a water disaster accident occurs due to water inrush in the coal mine, the increase in the height of the superimposed pump house makes the roadway and the lower pump house become a buffer water storage space, and the main drainage pump of the superimposed pump house can work for a long time under the premise of maintaining the maximum drainage capacity, thereby reducing the water inflow in the roadway, providing rescue time for drainage rescue, and enabling underground personnel to evacuate in time. In the double-pump house positive pressure water feeding intelligent drainage system, the controller switches and controls the drainage pump groups according to intelligent drainage strategies under different water inflow conditions and equipment failure conditions in the mine, and the drainage control precision is high. This greatly improves the response speed and efficiency of the rescue drainage, and further improves the safety and reliability of the mine operation.

[0010] To achieve the above-mentioned purpose, the second technical solution provided by the present application is:

[0011] A water inflow measurement method for any of the above-mentioned double-pump house positive pressure water feeding intelligent drainage systems, specifically comprising the following steps:

[0012] Step 1: Using a water level calibration method, calibrate the water level of the water tank when the mine is normally water-inflown to obtain the water storage volume corresponding to each calibration scale.

[0013] Step 2: Obtain the total drainage capacity of the double-pump house positive pressure water feeding intelligent drainage system ; wherein, represents the rotational speed of the first pre-motor; represents the drainage capacity of the first pre-pump per unit time; represents the drainage duration; and is a natural number, and .

[0014] Step 3, according to step 1, step 2, obtain the total normal water inflow of the mine ; wherein, represents the normal water inflow of the mine per unit time, and ; represents the water storage change of the water sump after drainage for time.

[0015] In summary, in the water inflow measurement method of the positive pressure water feeding intelligent drainage system of the double pump house according to the present application, since the shape of the water sump is irregular and is affected by the silt deposited in the mine, the water sump capacity is difficult to determine; therefore, the water inflow measurement method according to the present application first adopts the water level tracking calibration method to segmentally track and mark the water sump capacity. After the water sump capacity is marked, the total drainage capacity of the positive pressure water feeding intelligent drainage system of the double pump house is obtained, and the total water inflow of the mine is obtained according to the total drainage capacity. As can be seen, due to the segmental marking of the water sump capacity, the water sump capacity or the change of the water sump capacity can be accurately obtained, which greatly improves the measurement accuracy of the water inflow. When a water inrush accident occurs in the coal mine, the drainage control can be performed according to the total water inflow of the mine, so that the water inflow measurement method according to the present application has the characteristic of high accuracy. Further, this greatly improves the response speed and efficiency of the rescue drainage, and improves the safety and reliability of the mine operation. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall component structure schematic diagram of the single pump group of the positive pressure water feeding intelligent drainage system of the double pump house according to the present application.

[0017] Figure 2 It is the distribution structure schematic diagram of the pipeline system and valve unit of the double pump house according to the present application.

[0018] Figure 3 It is the top view of the lower pump house according to the present application.

[0019] Figure 4 It is the top view of the upper pump house according to the present application.

[0020] Figure 5 It is the overall flow schematic diagram of the water inflow measurement method according to the present application. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0022] Figure 1The figure is a schematic diagram of the overall structure of a single pump set of the positive pressure water feeding intelligent drainage system of the duplex pump house. Figure 2 The figure is a schematic diagram of the distribution structure of the pipeline system and valve unit of the duplex pump house. Figure 3 The figure is a top view of the lower pump house. Figure 4 The figure is a top view of the upper pump house. Figures 1-4 As shown in the figure, the duplex pump house positive pressure water feeding intelligent drainage system comprises: a lower pump house unit for connecting the water distribution wells 6 through the water distribution well covers 10, connecting the upper pump house unit through the passages, and feeding the mine water sucked by the three pre-pumps to the lower pump house unit of the upper pump house unit through the pipeline system under the driving of the three pre-motors according to the control instructions sent by the controller; three main drainage pumps and three main drainage motors for being installed, and draining the mine water from the lower pump house unit by the three main drainage pumps to the outside of the mine through the pipeline system under the driving of the three main drainage motors according to the control instructions sent by the controller; a pipeline system for connecting the three pre-pumps in the lower pump house unit, connecting the lower pump house unit and the upper pump house unit, and connecting the upper pump house unit and the outside of the mine; a valve unit for controlling the pipeline system to be turned on, turned off or the flow rate according to the control instructions of the controller; a detection unit for sending the detected real-time water level of the first water distribution well, the real-time water level of the second water distribution well, the real-time water level of the third water distribution well, the real-time water level of the lower pump house, and the water flow rate of the pipeline system to the outside of the mine to the controller; the detection unit is used for pre-setting the warning water level of the first water distribution well, the warning water level of the second water distribution well, the warning water level of the third water distribution well, and the warning water level of the lower pump house, comparing the real-time water level of the first water distribution well, the real-time water level of the second water distribution well, the real-time water level of the third water distribution well, and the real-time water level of the lower pump house sent by the detection unit with the warning water level of the first water distribution well, the warning water level of the second water distribution well, the warning water level of the third water distribution well, and the warning water level of the lower pump house; the detection unit is also used for identifying the fault of the first pre-pump and identifying the mine water inrush; the controller is used for sending the control instructions to the valve unit, the lower pump house unit, and the upper pump house unit according to the comparison results, the fault identification results, and the mine water inrush identification results, and controlling according to the intelligent drainage strategy; wherein, there are three water distribution wells, and the three water distribution wells, the three pre-pumps, and the three pre-motors are one-to-one corresponding, each pre-pump and the corresponding pre-motor are installed at the bottom of the corresponding water distribution well; the three main drainage pumps and the three main drainage motors are one-to-one corresponding; the three passages are also one-to-one corresponding among the three passages and the three pre-pumps.

[0023] The lower pump house unit is located above the three water distribution wells; the upper pump house unit is located 4-5 meters above the mine roadway; the pipeline system is distributed in the lower pump house unit, the upper pump house unit, the three water distribution wells, and the three passages; the valve unit is installed on the pipeline system; and the detection unit is installed on the upper pump house unit, the lower pump house unit, the three water distribution wells, and the pipeline system.

[0024] As Figure 1 shown, in actual work, the mine structure includes the horizontal roadway 1, the sedimentation tank 2, the water retaining wall 3 and the water sump 4 in addition to the above-mentioned component structure. After the mine water enters the horizontal roadway 1, it continues to enter the sedimentation tank 2 for water and coal slurry particle deposition. The bottom of the sedimentation tank 2 is provided with the water retaining wall 3 near the side of the water sump 4. The water retaining wall 3 has a certain blocking effect on the mine water flowing into the sedimentation tank 2. When the mine water quantity is relatively large and the mine water depth exceeds the water retaining wall 3, the mine water overflows the water retaining wall and enters the water sump 4. The three water diversion wells 6 are all communicated with the water sump 4.

[0025] In summary, the double-pump-house positive pressure feeding water intelligent drainage system includes three sets of positive pressure feeding water drainage pump groups: the first set of drainage pump group composed of the first pre-motor, the first pre-pump, the first main drainage motor, the first main drainage pump and the corresponding pipeline, the second set of drainage pump group composed of the second pre-motor, the second pre-pump, the second main drainage motor, the second main drainage pump and the corresponding pipeline, and the third set of drainage pump group composed of the third pre-motor, the third pre-pump, the third main drainage motor, the third main drainage pump and the corresponding pipeline and electric valve. Among them, the first set of drainage pump group is the working pump group, the second set of drainage pump group is the standby pump group, and the third set of drainage pump group is the maintenance pump group. In actual application, when water inrush occurs in the mine and the water quantity is very large, the three sets of pump groups can simultaneously perform drainage. When each set of drainage pump group performs drainage work, the pre-pump positively feeds water to the corresponding main drainage pump under the action of the pre-motor, rather than relying on the main drainage pump to perform drainage by negative pressure water suction. In this way, the height of the superposed pump house can be increased, the lift of the main drainage pump is increased, and the risk of water flooding of the main drainage pump and other equipment prone to damage due to water flooding is greatly reduced. At the same time, the increase of the height of the main drainage pump also reduces the cavitation damage to itself, and improves the service life of the main drainage pump. In addition, when a water inrush accident occurs in the coal mine, the increase of the height of the superposed pump house makes the roadway and the lower pump house become a buffer water storage space, and the main drainage pump of the superposed pump house can work for a long time under the premise of maintaining the maximum drainage capacity, so as to reduce the water inflow in the roadway, provide rescue time for drainage rescue, and enable the underground personnel to evacuate in time. In the double-pump-house positive pressure feeding water intelligent drainage system, the controller switches and controls the drainage pump groups according to the intelligent drainage strategy under different water inflow conditions and equipment failure conditions in the mine, and the drainage control precision is high, which greatly improves the response speed and efficiency of the rescue drainage, and further improves the safety and reliability of the mine operation.

[0026] In the system, as Figure 3As shown, the lower pump house unit comprises: a lower pump house 5 for communicating with three branch wells 6 through three branch well covers 10 respectively, and communicating with the upper pump house unit through three channels; a first pre-pump 7, a second pre-pump 26 and a third pre-pump 27 for respectively sucking mine water under the driving of the first pre-pump, the second pre-pump and the third pre-pump, and feeding the mine water to the upper pump house unit through a pipeline system; wherein the height of the lower pump house is consistent with the height of the mine tunnel.

[0027] The three pre-pumps are connected through the pipeline system, and a valve unit is further arranged on the pipeline system.

[0028] In the system, the first pre-pump 7, the second pre-pump 26 and the third pre-pump 27 are all mixed flow submersible pumps. The mixed flow pump has the characteristics of large flow, medium lift, simple start-stop control, and can be used directly underwater. In practical application, the mixed flow pump can cope with the condition of more coal slurry particles and turbid water quality in the mine.

[0029] In the system, as shown in the figure, Figure 4 The upper pump house unit comprises: an upper pump house 12 for sequentially communicating with the lower pump house 5 through three channel covers and three channels, and providing installation space for arranging three main drainage pumps and three main drainage motors; a first main drainage motor, a second main drainage motor and a third main drainage motor for starting, running and stopping according to the control instruction sent by the controller; a first main drainage pump 14, a second main drainage pump 24 and a third main drainage pump 25 for respectively sucking the water fed from the first pre-pump 7, the second pre-pump 26 and the third pre-pump 27 through the pipeline system under the driving of the first main drainage motor, the second main drainage motor and the third main drainage motor, and discharging the sucked water outside the mine through the pipeline system; wherein the first pre-pump 7, the second pre-pump 26 and the third pre-pump 27 correspond to the first main drainage pump 14, the second main drainage pump 24 and the third main drainage pump 25 respectively; the three channel covers correspond to the three channels respectively;

[0030] Valve units and detection units are arranged on the pipeline system corresponding to the first pre-pump 7, the second pre-pump 26, the third pre-pump 27, the first main drainage pump 14, the second main drainage pump 24 and the third main drainage pump 25, and on the pipeline system outside the mine.

[0031] In the system, the first main drainage pump 14, the second main drainage pump 24 and the third main drainage pump 25 are all horizontal centrifugal pumps.

[0032] In the system, as shown in the figure, Figure 2As shown, the pipeline system comprises: three-way water suction pipeline 19, three-way drainage pipe 20, two communication pipes 34, two branch pipes 39; wherein, the three-way water suction pipeline 19 corresponds to the first pre-pump 7, the second pre-pump 26, the third pre-pump 27 respectively, the three-way water suction pipeline 19 also corresponds to the first main drainage pump 14, the second main drainage pump 24, the third main drainage pump 25 respectively, the three-way drainage pipe corresponds to the first main drainage pump 14, the second main drainage pump 24, the third main drainage pump 25 respectively;

[0033] Each water suction pipeline 19 is connected to the corresponding pre-pump drainage port at one end, and at the other end, sequentially passes through the corresponding water distribution well 6, the corresponding water distribution well cover 10, the lower pump house 5, the corresponding channel, enters the upper pump house 12, and is connected to the corresponding main drainage pump suction port; each water suction pipeline 19 is fixed to the corresponding water distribution well wall, the lower pump house bottom 5, and the corresponding channel wall. Each drainage pipe 20 is connected to the corresponding main drainage pump drainage port at one end, and is connected to the mine outside at the other end.

[0034] Between the three water suction pipelines 19 from the three water distribution wells 6 at the lower pump house bottom, the two communication pipes 34 are communicated; the two water suction pipelines 19 corresponding to the water distribution well 6 corresponding to the first pre-motor or the first pre-pump and the water distribution well 6 corresponding to the third pre-motor or the third pre-pump are also connected to one end of the branch pipe 39 respectively, and the water suction pipeline 19 corresponding to the water distribution well 6 corresponding to the second pre-motor or the second pre-pump has no branch pipe 39; the other end of the two branch pipes 39 is respectively connected to the first main drainage pump suction port and the third main drainage pump suction port.

[0035] In the system, the detection unit comprises: three flow meters 15 respectively used for detecting the water flow of the three-way drainage pipe 20; three first liquid level sensors respectively used for measuring the real-time water level of the first water distribution well, the real-time water level of the second water distribution well, and the real-time water level of the third water distribution well; a second liquid level sensor used for measuring the real-time water level of the lower pump house; wherein,

[0036] The three flow meters 15 are respectively installed on the outlet side of the first main drainage pump 14, the second main drainage pump 24, and the third main drainage pump 25; the first liquid level sensor, the second liquid level sensor, and the third liquid level sensor are respectively installed on the well wall of the corresponding water distribution well 16; and the second liquid level sensor is installed on the wall of the lower pump house 5.

[0037] In the system, each liquid level sensor is a liquid level sensor, which comprises a measuring part 8, a line part and a display part 13, the measuring part 8 is installed at the bottom of the water distribution well 6 and is consistent with the ground level of the water sump 4, the line part is a special pipeline, which is fixed on the wall of the water distribution well 6, the bottom of the lower pump house 5 and the passage between the lower pump house 5 and the upper pump house 12, and the display part is fixed on the wall of the upper pump house 12.

[0038] In actual application, the detection unit further comprises: three water inlet pressure gauges 17 for detecting the water inlet pressure of the first main drainage pump 14, the second main drainage pump 24 and the third main drainage pump 25 respectively; and three drainage pressure gauges 18 for detecting the water outlet pressure of the first main drainage pump 14, the second main drainage pump 24 and the third main drainage pump 25 respectively. The three water inlet pressure gauges 17 and the three drainage pressure gauges 18 are used to send the measured water inlet pressure and water outlet pressure of the three main drainage pumps to the controller respectively. The three water inlet pressure gauges 17 are installed on the water inlet side of the first main drainage pump 14, the second main drainage pump 24 and the third main drainage pump 25 respectively. The three drainage pressure gauges 18 are installed on the water outlet side of the corresponding first main drainage pump 14, second main drainage pump 24 and third main drainage pump 25 respectively.

[0039] In the system, the valve unit comprises: a first to third lower stop valve 9, 32, 33 for automatically adjusting the water flow under the control of the control instruction sent by the controller; a first to third upper stop valve 16, 35, 36 for automatically adjusting the water flow under the control of the control instruction sent by the controller; a first to fourth communication valve 28~31 for automatically adjusting the water flow under the control of the control instruction sent by the controller; wherein each lower stop valve, each upper stop valve and each communication valve are electric gate valves.

[0040] The first to third lower stop valves 9, 32, 33 are respectively installed on the three water suction pipelines 19 and are respectively located between the intersection of the corresponding water suction pipeline 19 and the communication pipe 34 and the corresponding pre-pump; the first to third lower stop valves 9, 32, 33 are also respectively located inside the corresponding water distribution well 6 cover 10.

[0041] The first to third upper stop valves 16, 35, 36 are also respectively installed on the three water suction pipelines 19 and are located near the water suction inlet side of the corresponding main drainage pump.

[0042] The first and second communication valves 28, 29 are respectively installed on the two communication pipes 34, and the third and fourth communication valves 30, 31 are respectively installed on the two branch pipes 39.

[0043] In practical application, the electric gate valve according to the control instruction completes opening and closing structure is the prior art, hereinafter will not be described.

[0044] In practical application, two branch pipes 39 are also respectively provided with a filter screen 11 for filtering mine water.

[0045] In the system, the controller comprises: a preset unit, a comparison unit, a fault recognition unit, a water inrush recognition unit, a processing unit and a driving unit; wherein the driving unit comprises: a first pre-driver to a third pre-driver, a first main drainage driver to a third main drainage driver;

[0046] The preset unit is used for presetting a first water distribution well warning water level, a second water distribution well warning water level, a third water distribution well warning water level and a lower pump house warning water level.

[0047] The fault recognition unit is used for fault diagnosis of the first pre-pump: when the first pre-pump is faulty, a fault signal is sent to the processing unit; when the first pre-pump is not faulty, a normal signal is sent to the processing unit.

[0048] In the system, fault diagnosis is the prior art, and hereinafter will not be described.

[0049] The water inrush recognition unit is used for recognizing water inrush of the mine: when there is no water inrush phenomenon in the mine, a no water inrush signal is sent to the processing unit; when there is water inrush phenomenon in the mine, a water inrush signal is sent to the processing unit.

[0050] In the system, water inrush recognition is the prior art, and hereinafter will not be described.

[0051] The comparison unit is used for comparing the real-time water level of the first water distribution well sent by the detection unit with the first water distribution well warning water level read from the preset unit, or comparing the real-time water level of the second water distribution well sent by the detection unit with the second water distribution well warning water level read from the preset unit, or comparing the real-time water level of the third water distribution well sent by the detection unit with the third water distribution well warning water level read from the preset unit: when the real-time water level of the first water distribution well is equal to or greater than the first water distribution well warning water level, or when the real-time water level of the second water distribution well is equal to or greater than the second water distribution well warning water level, or when the real-time water level of the third water distribution well is equal to or greater than the third water distribution well warning water level, a first warning signal is sent to the processing unit; and is used for comparing the real-time water level of the lower pump house sent by the detection unit with the lower pump house warning water level read from the preset unit: when the real-time water level of the lower pump house is equal to or greater than the lower pump house warning water level, a second warning signal is sent to the processing unit.

[0052] The processing unit sends corresponding control instructions to the driving unit and the valve unit according to intelligent drainage strategies according to normal signals or fault signals sent by the fault identification unit, no-inrush signals or inrush signals sent by the inrush identification unit, and the first warning signal or the second warning signal sent by the comparison unit.

[0053] In practical applications, the controller can be a programmable logic controller, a single-chip microcomputer, a digital signal processor, etc.

[0054] In practical applications, the communication between the controller and the detection unit can be wired communication or wireless communication. Here, both wired communication and wireless communication are prior art, and will not be described again.

[0055] In the system, the intelligent drainage strategy specifically includes the following steps:

[0056] Step A: When the first pre-pump is fault-free and the mine has no inrush, that is, the mine is normally drained, according to the first running instruction sent by the processing unit, the first pre-driver drives the first pre-motor to run, and the first main drainage driver drives the first main drainage motor to run, and the first pre-motor and the first main drainage motor drive the first pre-pump and the first main drainage pump to run, respectively; according to the first opening instruction sent by the processing unit, the first lower stop valve 9 and the first upper stop valve 16 are opened; at the same time, according to the second stop instruction sent by the processing unit, the second pre-driver and the second main drainage driver are both stopped, and the second pre-motor and the second main drainage motor remain in a stopped state; according to the third stop instruction sent by the processing unit, the third pre-driver and the third main drainage driver are both stopped, and the third pre-motor and the third main drainage motor also remain in a stopped state; according to the second closing instruction sent by the processing unit, the second lower stop valve 32 and the second upper stop valve 35 remain in a closed state, and according to the third closing instruction sent by the processing unit, the third lower stop valve 33 and the third upper stop valve 36 remain in a closed state; according to the fourth closing instruction sent by the processing unit, the first communication valve 28, the second communication valve 29, the third communication valve 30 and the fourth communication valve 31 all remain in a closed state.

[0057] Step B: When the first pre-pump is faulty and the mine has no inrush, according to the fourth stop instruction sent by the processing unit, the first pre-driver is stopped, and the first pre-motor and the first pre-pump are both stopped; at the same time, according to the fourth running instruction sent by the processing unit, the second pre-driver drives the second pre-motor to run, and the second pre-motor drives the second pre-pump to run; according to the fifth closing instruction sent by the processing unit, the first lower stop valve 9 is closed; according to the sixth opening instruction sent by the processing unit, the second lower stop valve 32 is opened; according to the seventh opening instruction sent by the processing unit, the first communication valve 28 is opened.

[0058] Step C, when the first pre-pump is fault-free, the mine water inrush occurs, and the real-time water level of the first diversion well is equal to or greater than the warning water level of the first diversion well, or the real-time water level of the second diversion well is equal to or greater than the warning water level of the second diversion well, or the real-time water level of the third diversion well is equal to or greater than the warning water level of the third diversion well, according to the first operation instruction, the second operation instruction, the third operation instruction sent by the processing unit, the first pre-motor is driven by the first pre-driver to operate, the first main drainage motor is driven by the first main drainage driver to operate, the second pre-motor is driven by the second pre-driver to operate, the second main drainage motor is driven by the second main drainage driver to operate, the third pre-motor is driven by the third pre-driver to operate, and the third main drainage motor is driven by the third main drainage driver to operate. The first pre-motor drives the first pre-pump, the first main drainage motor drives the first main drainage pump, the second pre-motor drives the second pre-pump, the second main drainage motor drives the second main drainage pump, the third pre-motor drives the third pre-pump, and the third main drainage motor drives the third main drainage pump to operate correspondingly; at the same time, according to the first opening instruction, the second opening instruction, the third opening instruction sent by the processing unit, the first lower stop valve and the first upper stop valve, the second lower stop valve and the second upper stop valve, and the third lower stop valve and the third upper stop valve are opened correspondingly; according to the fourth closing instruction sent by the processing unit, the first communication valve 28, the second communication valve 29, the third communication valve 30 and the fourth communication valve 31 are kept in the closed state.

[0059] Step D, when the first pre-pump is fault-free, the mine water inrush occurs, and the real-time water level of the lower pump house is equal to or greater than the warning water level of the lower pump house, according to the second operation instruction sent by the processing unit, the second pre-motor is driven by the second pre-driver to operate, the second main drainage motor is driven by the second main drainage driver to operate, the second pre-motor drives the second pre-pump, and the second main drainage motor drives the second main drainage pump to keep the operating state; according to the fifth stop instruction and the sixth stop instruction sent by the processing unit, the first pre-driver and the third pre-driver stop working, the first pre-motor and the third pre-motor stop operating correspondingly, and the first pre-pump and the third pre-pump also stop operating correspondingly; according to the fifth operation instruction and the sixth operation instruction, the first main drainage motor is driven by the first main drainage driver to operate, the third main drainage motor is driven by the third main drainage driver to operate, and the first main drainage pump and the third main drainage pump also operate correspondingly; according to the sixth closing instruction sent by the processing unit, the first lower stop valve and the third lower stop valve are closed; according to the fifth opening instruction sent by the processing unit, the second lower stop valve, the first upper stop valve, the second upper stop valve and the third upper stop valve are opened; according to the seventh closing instruction sent by the processing unit, the first communication valve 28 and the second communication valve 29 are closed; according to the sixth opening instruction sent by the processing unit, the third communication valve 30 and the fourth communication valve 31 are opened.

[0060] Figure 5 The overall flowchart of the water inflow measurement method is shown in the figure.Figure 5 The water inflow measuring method for the double-pump house positive pressure water feeding intelligent drainage system specifically comprises the following steps:

[0061] Step 1: The water level calibration method is used to calibrate the water level of the water sump when the mine is normally inflowing water, so as to obtain the water storage of the water sump corresponding to each calibration scale.

[0062] Step 2: The total drainage capacity of the double-pump house positive pressure water feeding intelligent drainage system is obtained ; wherein, represents the rotating speed of the No. preposed motor; represents the drainage capacity of the No. preposed pump in unit time; represents the drainage duration; is a natural number, and .

[0063] Step 3: The total water inflow of the mine is obtained according to Step 1 and Step 2 ; wherein, represents the water inflow of the mine in unit time, and ; represents the change of water storage of the water sump after drainage for a period of time.

[0064] In summary, in the water inflow measuring method for the double-pump house positive pressure water feeding intelligent drainage system, the water sump shape is irregular, and the water sump capacity is difficult to determine due to the influence of the silt deposited in the mine. Therefore, the water inflow measuring method first uses the water level calibration method to segmentally mark the water sump capacity. After the water sump capacity is marked, the total drainage capacity of the double-pump house positive pressure water feeding intelligent drainage system is obtained, and the total water inflow of the mine is obtained according to the total drainage capacity. As can be seen, due to the segmented marking of the water sump capacity, the water sump capacity or the change of the water sump capacity can be accurately obtained, which greatly improves the measurement accuracy of the water inflow. When a water inrush accident occurs in the coal mine, the drainage control can be performed according to the total water inflow of the mine, so that the water inflow measuring method has the characteristics of high accuracy. Further, the response speed and efficiency of the rescue drainage are greatly improved, and the safety and reliability of the mine operation are improved.

[0065] In the water inflow measuring method, Step 1 specifically comprises the following steps:

[0066] Step 11: The rotating speed of each preposed motor is adjusted so that the water sump level height remains unchanged, that is, ; wherein, represents the normal water inflow of the mine in unit time. ​

[0067] Step 12, reduce the speed of each said front motor, or, only make the corresponding front motor, front pump, main drainage motor, main drainage pump set operation, to reduce the drainage capacity, until each sub well real-time water level reaches the sub well warning water level, at this time, the water sump is full of water.

[0068] Step 13, the total height of the water sump water level is divided into N equal parts, and is scaled in order from bottom to top, the th scale corresponds to a water level height of ; wherein , are natural numbers, and ; that is, indicates that the water sump is full of water.

[0069] Step 14, increase the speed of each said front motor, or, increase the operation of the drainage pump set, increase the drainage capacity to chase water, so that the water sump water level height gradually decreases, and the water is chased to the water sump; at this time, it satisfies ; indicates the water storage capacity of the water sump.

[0070] Step 15, according to step 14, the water level height of the th scale corresponding to the water storage capacity of the water sump ; wherein indicates the time spent when the water storage capacity of the water sump decreases from the th scale to the th scale.

[0071] In actual application, when the water sump water level decreases from the th scale to the th scale, the water storage change amount ; wherein indicates the time spent when the water sump water level decreases from the th scale to the th scale, indicates the water storage capacity of the water sump corresponding to the water level height of the h th scale, is a natural number, , and . .

[0072] In actual application, for the water sump capacity water level calibration, it is calibrated once a month in the rainy season; once every two months in the non-rainy season, to ensure that the water storage capacity of the water sump can be accurately measured in various situations.

[0073] In practical application, the water inflow measuring method corresponds to two working conditions of normal water inflow and water inrush, and is suitable for both.

[0074] To sum up, the above is only a preferred embodiment of the present application, not for limiting the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A duplex pump house positive pressure water feeding intelligent drainage system, characterized in that, The intelligent drainage system comprises: a lower pump house unit for communicating three water distribution wells through the water distribution well covers and communicating the upper pump house unit through the passages, and for feeding the mine water sucked by the three pre-pumps to the lower pump house unit of the upper pump house unit through the pipeline system under the driving of the three pre-motors according to the control instructions sent by the controller; three main drainage pumps and three main drainage motors are arranged, and the mine water from the lower pump house unit is discharged by the three main drainage pumps to the outside of the mine through the pipeline system under the driving of the three main drainage motors according to the control instructions sent by the controller; the pipeline system is used for communicating the three pre-pumps in the lower pump house unit, communicating the lower pump house unit and the upper pump house unit, and communicating the upper pump house unit and the outside of the mine; a valve unit is used for controlling the pipeline system to be turned on, turned off or the flow size according to the control instructions of the controller; a detection unit is used for sending the detected real-time water level of the first water distribution well, the real-time water level of the second water distribution well, the real-time water level of the third water distribution well, the real-time water level of the lower pump house, and the water flow of the pipeline system to the outside of the mine to the controller; the detection unit is used for pre-setting the warning water level of the first water distribution well, the warning water level of the second water distribution well, the warning water level of the third water distribution well, and the warning water level of the lower pump house, and comparing the real-time water level of the first water distribution well, the real-time water level of the second water distribution well, the real-time water level of the third water distribution well, and the real-time water level of the lower pump house sent by the detection unit with the warning water level of the first water distribution well, the warning water level of the second water distribution well, the warning water level of the third water distribution well, and the warning water level of the lower pump house; the detection unit is also used for identifying the fault of the first pre-pump and identifying the mine water inrush; the controller is used for sending control instructions to the valve unit, the lower pump house unit and the upper pump house unit according to the comparison results, the fault identification results and the mine water inrush identification results, and controlling according to the intelligent drainage strategy; wherein, the three water distribution wells are one-to-one corresponding to the three water distribution wells, the three pre-pumps and the three pre-motors, each pre-pump and the corresponding pre-motor are installed at the bottom of the corresponding water distribution well, and the three main drainage pumps are one-to-one corresponding to the three main drainage motors; the three passages are also one-to-one corresponding to the three pre-pumps; The lower pump house unit is located above the three water distribution wells; the upper pump house unit is located 4-5 meters above the mine roadway; the pipeline system is distributed in the lower pump house unit, the upper pump house unit, the three water distribution wells and the three passages; the valve unit is installed on the pipeline system; the detection unit is installed on the upper pump house unit, the lower pump house unit, the three water distribution wells and the pipeline system.

2. The double pump house positive pressure water feeding intelligent drainage system according to claim 1, characterized in that, The lower pump house unit comprises: a lower pump house for communicating three water distribution wells through three water distribution well covers and communicating the upper pump house unit through three passages; a first pre-motor, a second pre-motor and a third pre-motor for starting, running and stopping according to the control instructions sent by the controller; a first pre-pump, a second pre-pump and a third pre-pump for sucking mine water under the driving of the first pre-motor, the second pre-motor and the third pre-motor respectively, and feeding the mine water to the upper pump house unit through the pipeline system; wherein, the height of the lower pump house is consistent with the height of the mine roadway. The three front pumps are connected through a pipeline system, and a valve unit is arranged on the pipeline system.

3. The double pump house positive pressure water feeding intelligent drainage system according to claim 2, characterized in that, The first front pump, the second front pump and the third front pump are mixed flow submersible pumps.

4. The double pump house positive pressure water feeding intelligent drainage system according to claim 3, characterized in that, The upper pump house unit comprises: an upper pump house for sequentially passing through three channel covers, three channels, the lower pump house, and providing installation spaces for the three main drainage pumps and the three main drainage motors; a first main drainage motor, a second main drainage motor and a third main drainage motor for starting, running and stopping according to the control instructions sent by the controller; a first main drainage pump, a second main drainage pump and a third main drainage pump for respectively sucking water from the first front pump, the second front pump and the third front pump through the pipeline system under the driving of the first main drainage motor, the second main drainage motor and the third main drainage motor, and discharging the sucked water outside the mine through the pipeline system; wherein, the first front pump, the second front pump and the third front pump correspond to the first main drainage pump, the second main drainage pump and the third main drainage pump one by one; the three channel covers correspond to the three channels one by one; The pipeline system corresponding to the connection of the first front pump, the second front pump, the third front pump and the first main drainage pump, the second main drainage pump, the third main drainage pump, the first main drainage pump, the second main drainage pump and the third main drainage pump connected to the pipeline system outside the mine are all provided with the valve unit and the detection unit.

5. The double pump house positive pressure water feeding intelligent drainage system according to claim 4, characterized in that, The first main drainage pump, the second main drainage pump and the third main drainage pump are horizontal centrifugal pumps.

6. The duplex pump house positive pressure water feeding intelligent drainage system according to claim 4, characterized in that, The pipeline system comprises three water suction pipelines, three water discharge pipes, two connecting pipes and two branch pipes; wherein, the three water suction pipelines correspond to the first front pump, the second front pump and the third front pump respectively, and also correspond to the first main drainage pump, the second main drainage pump and the third main drainage pump respectively; the three water discharge pipes correspond to the first main drainage pump, the second main drainage pump and the third main drainage pump respectively; One end of each water suction pipeline is connected to the corresponding front pump discharge port, and the other end of each water suction pipeline sequentially passes through the corresponding water distribution well, the corresponding water distribution well cover, the lower pump house and the corresponding channel, enters the upper pump house and is connected to the corresponding main drainage pump suction port; each water suction pipeline is fixed to the corresponding water distribution well wall, the lower pump house bottom and the corresponding channel wall; One end of each water discharge pipe is connected to the corresponding main drainage pump discharge port, and the other end of each water discharge pipe is connected to the outside of the mine; The three water suction pipelines from the three water distribution wells are connected by the two connecting pipes at the lower pump house bottom; the two water suction pipelines corresponding to the water distribution well corresponding to the first front motor or the first front pump and the water distribution well corresponding to the third front motor or the third front pump are respectively connected to one end of a branch pipe; the water distribution well corresponding to the second front motor or the second front pump is not provided with a branch pipe; the other end of the two branch pipes correspond to the first main drainage pump suction port and the third main drainage pump suction port respectively.

7. The duplex pump house positive pressure water feeding intelligent drainage system according to claim 6, characterized in that, The detection unit comprises: three flow meters respectively used for detecting water flow of the three drainage pipes; three first liquid level sensors respectively used for measuring real-time water level of a first branch well, real-time water level of a second branch well, and real-time water level of a third branch well corresponding to the three branch wells; a second liquid level sensor used for measuring real-time water level of the lower pump house; wherein, The first liquid level sensor, the second liquid level sensor, and the third liquid level sensor are respectively installed on the well wall of the corresponding branch well; and the second liquid level sensor is installed on the wall of the lower pump house.

8. The double pump house positive pressure water feeding intelligent drainage system according to claim 6, characterized in that, The valve unit comprises: a first lower stop valve to a third lower stop valve used for automatically adjusting water flow under the control instruction sent by the controller; a first upper stop valve to a third upper stop valve used for automatically adjusting water flow under the control instruction sent by the controller; a first communication valve to a fourth communication valve used for automatically adjusting water flow under the control instruction sent by the controller; wherein each lower stop valve, each upper stop valve, and each communication valve are electric gate valves; The first lower stop valve to the third lower stop valve are respectively installed on the three water suction pipelines and are respectively located between the intersection of the corresponding water suction pipeline and the communication pipeline and the corresponding front pump; and the first lower stop valve to the third lower stop valve are also located inside the corresponding branch well cover. The first upper stop valve to the third upper stop valve are also respectively installed on the three water suction pipelines and are located near the water suction port side of the corresponding main drainage pump. The first communication valve and the second communication valve are respectively installed on the two communication pipelines, and the third communication valve and the fourth communication valve are respectively installed on the two branch pipelines.

9. The duplex pump house positive pressure water feeding intelligent drainage system according to claim 6, characterized in that, A filter screen for filtering mine water is further installed on each of the two branch pipelines.

10. The duplex pump house positive pressure water feeding intelligent drainage system according to claim 8, characterized in that, The controller comprises: a preset unit, a comparison unit, a fault recognition unit, a water inrush recognition unit, a processing unit, and a driving unit; wherein the driving unit comprises: a first front driving unit to a third front driving unit, and a first main drainage driving unit to a third main drainage driving unit; The preset unit is used for pre-setting a first branch well warning water level, a second branch well warning water level, a third branch well warning water level, and a lower pump house warning water level; The fault recognition unit is used for diagnosing fault of the first front pump: when the first front pump is faulty, a fault signal is sent to the processing unit; and when the first front pump is not faulty, a normal signal is sent to the processing unit; The water inrush recognition unit is used for recognizing mine water inrush: when there is no mine water inrush phenomenon, a no water inrush signal is sent to the processing unit; and when there is a mine water inrush phenomenon, a water inrush signal is sent to the processing unit; The comparison unit is configured to compare the real-time water level of the first diversion well sent by the detection unit with the warning water level of the first diversion well read from the preset unit, or compare the real-time water level of the second diversion well sent by the detection unit with the warning water level of the second diversion well read from the preset unit, or compare the real-time water level of the third diversion well sent by the detection unit with the warning water level of the third diversion well read from the preset unit; when the real-time water level of the first diversion well is equal to or greater than the warning water level of the first diversion well, or when the real-time water level of the second diversion well is equal to or greater than the warning water level of the second diversion well, or when the real-time water level of the third diversion well is equal to or greater than the warning water level of the third diversion well, a first warning signal is sent to the processing unit; the comparison unit is configured to compare the real-time water level of the lower pump house sent by the detection unit with the warning water level of the lower pump house read from the preset unit; when the real-time water level of the lower pump house is equal to or greater than the warning water level of the lower pump house, a second warning signal is sent to the processing unit; The processing unit is configured to send corresponding control instructions to the driving unit and the valve unit according to the normal signal or the fault signal sent by the fault identification unit, the no-inrush signal or the inrush signal sent by the inrush identification unit, and the first warning signal or the second warning signal sent by the comparison unit, according to the intelligent drainage strategy.

11. The duplex pump house positive pressure water feeding intelligent drainage system according to claim 10, characterized in that, The intelligent drainage strategy specifically includes the following steps: When the first pre-pump is normal and the mine has no inrush, that is, when the mine is normally drained, according to the first operation instruction sent by the processing unit, the first pre-driver drives the first pre-motor to operate, and the first main drainage driver drives the first main drainage motor to operate; according to the first opening instruction sent by the processing unit, the first lower stop valve and the first upper stop valve are opened; at the same time, according to the second stop instruction sent by the processing unit, the second pre-driver and the second main drainage driver are stopped, and the second pre-motor and the second main drainage motor remain in a stopped state; according to the third stop instruction sent by the processing unit, the third pre-driver and the third main drainage driver are stopped, and the third pre-motor and the third main drainage motor also remain in a stopped state; according to the second closing instruction sent by the processing unit, the second lower stop valve and the second upper stop valve remain in a closed state, and according to the third closing instruction sent by the processing unit, the third lower stop valve and the third upper stop valve remain in a closed state; according to the fourth closing instruction sent by the processing unit, the first communication valve, the second communication valve, the third communication valve and the fourth communication valve all remain in a closed state; Step B, when the first pre-pump fails and the mine has no water inrush, according to the fourth stop command sent by the processing unit, the first pre-driver stops working, the first pre-motor and the first pre-pump stop running; at the same time, according to the fourth running command sent by the processing unit, the second pre-driver drives the second pre-motor to run, and the second pre-motor drives the second pre-pump to run; according to the fifth closing command sent by the processing unit, the first lower stop valve is closed; according to the sixth opening command sent by the processing unit, the second lower stop valve is opened; according to the seventh opening command sent by the processing unit, the first communication valve is opened; Step C, when the first pre-pump has no fault, the mine has water inrush, and the real-time water level of the first water distribution well is equal to or greater than the warning water level of the first water distribution well, or the real-time water level of the second water distribution well is equal to or greater than the warning water level of the second water distribution well, or the real-time water level of the third water distribution well is equal to or greater than the warning water level of the third water distribution well, according to the first running command, the second running command and the third running command sent by the processing unit, the first pre-driver drives the first pre-motor to run, the first main drainage driver drives the first main drainage motor to run, the second pre-driver drives the second pre-motor to run, the second main drainage driver drives the second main drainage motor to run, the third pre-driver drives the third pre-motor to run, the third main drainage driver drives the third main drainage motor to run, the first pre-motor drives the first pre-pump, the first main drainage motor drives the first main drainage pump, the second pre-motor drives the second pre-pump, the second main drainage motor drives the second main drainage pump, the third pre-motor drives the third pre-pump, and the third main drainage motor drives the third main drainage pump to run correspondingly; at the same time, according to the first opening command, the second opening command and the third opening command sent by the processing unit, the first lower stop valve and the first upper stop valve, the second lower stop valve and the second upper stop valve, and the third lower stop valve and the third upper stop valve are all opened correspondingly; according to the fourth closing command sent by the processing unit, the first communication valve, the second communication valve, the third communication valve and the fourth communication valve all remain in the closed state; Step D, when the first pre-pump is malfunctioning, the mine water inrush occurs, and the real-time water level of the lower pump house is equal to or greater than the warning water level of the lower pump house, according to the second operation instruction sent by the processing unit, the second pre-driver drives the second pre-motor to operate, the second main drainage driver drives the second main drainage motor to operate, the second pre-motor drives the second pre-pump, and the second main drainage motor drives the second main drainage pump to keep operating; according to the fifth stop instruction and the sixth stop instruction sent by the processing unit, the first pre-driver and the third pre-driver stop working, the first pre-motor and the third pre-motor stop operating correspondingly, and the first pre-pump and the third pre-pump also stop operating correspondingly; according to the fifth operation instruction and the sixth operation instruction, the first main drainage driver drives the first main drainage motor to operate, and the third main drainage driver drives the third main drainage motor to operate, and the first main drainage pump and the third main drainage pump also operate correspondingly; according to the sixth closing instruction sent by the processing unit, the first lower stop valve and the third lower stop valve are closed; according to the fifth opening instruction sent by the processing unit, the second lower stop valve, the first upper stop valve, the second upper stop valve, and the third upper stop valve are opened; according to the seventh closing instruction sent by the processing unit, the first communication valve and the second communication valve are closed; according to the sixth opening instruction sent by the processing unit, the third communication valve and the fourth communication valve are opened.

12. A water inflow measurement method for the double-pump house positive pressure water feeding intelligent drainage system according to any one of claims 1-11, specifically comprising the following steps: Step 1, using the water level calibration method, calibrating the water level of the water sump when the mine is normally inflowing, to obtain the water storage capacity of the water sump corresponding to each calibration scale; Step 2, obtain the total drainage capacity of the double-pump house positive pressure water feeding intelligent drainage system ; wherein, represents the rotational speed of the front motor; represents the discharge amount of the front pump per unit time; represents the discharge time; is a natural number, and ; Step 3, obtaining the total mine water inflow according to Step 1, Step 2 ; wherein, represents the water inflow of the mine per unit time, and ; represents the change in the water storage of the sump after the drainage for a certain time. ​ 13. The water inflow measuring method according to claim 12, wherein Step 1 specifically comprises the following steps: Step 11, adjust the rotating speed of each said front motor so that the water sump liquid level height remains unchanged, then ; wherein, represents the normal water inflow of the mine per unit time; Step 12, reduce the speed of each pre-motor, or only make the single set of drainage pump group composed of the corresponding pre-motor, pre-pump, main drainage motor, and main drainage pump operate to reduce the drainage capacity, until the real-time water level of each water distribution well reaches the warning water level of the water distribution well, at this time, the water sump is full of water; Step 13, divide the total height of the water level of the water tank into N equal parts, and mark the scale in order from bottom to top, and the water level height corresponding to the first scale is ; wherein, , are natural numbers, and ; that is, indicates that the water tank is full of water; Step 14, increase the speed of each said front motor, or, increase the operation of the drainage pump set, increase the drainage capacity to chase water, so that the water level of the water tank gradually drops, and the water in the water tank is chased to be empty; at this time, the conditions of ; represent the water storage capacity of the water tank; Step 15, the water level height of the calibrated first scale is obtained according to step 14 The corresponding water storage amount of the water tank ; wherein, represents the time taken when the water amount of the water tank is reduced from the first scale to the second scale.

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