Indoor desilting conveying test parameter monitoring device and use method thereof

Abstract

The invention discloses an indoor desilting conveying test parameter monitoring device and a use method thereof, and belongs to the technical field of indoor desilting conveying tests. The indoor desilting conveying test parameter monitoring device comprises a U-shaped pipe, a differential pressure sensor, a flow meter, a sludge discharge header pipe, a sludge discharge branch pipe, a container barrel, a liquid level meter, a pressure sensor, a stepping motor, a telescopic rigid rod, a drainage pipe, a pressure bearing plate, a signal transmission line, a signal processing system and a base. In order to solve the problems that a small-scale desilting conveying test measurement method is limited and the measurement precision is low, the density, the flow, the yield and other parameters of mud can be measured in real time at high precision by adopting a U-shaped pipe connected with a mud suction pump and a double-container barrel discharged tail liquid monitoring device; the device has the advantages of simple structure, low cost, convenience in use, high measurement precision and real-time performance.

Description

Technical Field

[0001] The present invention relates to a test parameter monitoring device and its usage method in the technical field of indoor dredging and conveying tests, in particular to a test parameter monitoring device and its usage method for accurately and real-time measuring the density, total mass, and total volume of slurry in indoor dredging and conveying tests. Background Art

[0002] Carrying out indoor dredging and conveying tests is an important method for studying dredging mechanisms. During the test process, the accuracy of test parameter monitoring plays a decisive role in the test results. For some dredging conditions, such as dredging under a dock, due to space limitations, the dredging equipment is small and the conveying pipeline is thin; after scale conversion in physical model tests, the model size is even smaller. The application of conventional concentration measurement instruments, such as pipeline ultrasonic concentration meters, radioactive concentration meters, and electrical resistance tomography concentration meters, is limited in small pipelines. The measured value of the sampling method is usually used as the verification of the concentration meter measurement value, but it requires manual operation and does not have the advantage of online real-time. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a test parameter monitoring device and its usage method for indoor dredging and conveying tests, which can be applied to indoor small-scale tests, not only with high measurement accuracy but also capable of real-time online monitoring.

[0004] The present invention is achieved through the following technical solutions:

[0005] The present invention includes an indoor silt cleaning and conveying test parameter monitoring device, which comprises a test water tank, a sludge suction pump, a U-shaped pipe, a first differential pressure sensor, a second differential pressure sensor, a flowmeter, a main sludge discharge pipe, a first sludge discharge branch pipe, a second sludge discharge branch pipe, a first container bucket, a second container bucket, a liquid level gauge, a first pressure sensor, a second pressure sensor, a stepping motor, a telescopic rigid rod, a drain pipe, a bearing plate, a first signal transmission line, a signal processing system, a second signal transmission line, a third signal transmission line, a fourth signal transmission line, a first base, and a second base; the U-shaped pipe includes a front end pipe of the U-shaped pipe, a bottom pipe of the U-shaped pipe, and a rear end pipe of the U-shaped pipe; the sludge suction pump is arranged in the test water tank, and the sludge discharge outlet of the sludge suction pump is connected to the inlet of the front end pipe of the U-shaped pipe; the outlet of the rear end pipe of the U-shaped pipe is connected to the inlet of the main sludge discharge pipe, and the outlet of the main sludge discharge pipe is connected to the inlets of the first sludge discharge branch pipe and the second sludge discharge branch pipe. The outlets of the first sludge discharge branch pipe and the second sludge discharge branch pipe are respectively arranged directly above the first container bucket and the second container bucket; the first container bucket is arranged on the first base, the stepping motor is arranged on the outer part of the lower wall surface of the first container bucket, the bearing plate is arranged inside the first container bucket, one end of the telescopic rigid rod is connected to the stepping motor, and the other end of the telescopic rigid rod passes through the lower wall surface of the first container bucket and is connected to the bearing plate. The first pressure sensor is arranged between the telescopic rigid rod and the bearing plate, and the drain pipe is arranged on the bottom side wall of the first container bucket; the second pressure sensor is arranged on the second base, the second container bucket is arranged on the second pressure sensor, and the liquid level sensor is arranged on the top of the second container bucket; the first differential pressure sensor is arranged on the front end pipe of the U-shaped pipe, the second differential pressure sensor is arranged on the rear end pipe of the U-shaped pipe, and the flowmeter is arranged on the bottom pipe of the U-shaped pipe; the signal processing system is connected to the liquid level gauge, the second pressure sensor, the stepping motor, and the first pressure sensor through the first signal transmission line, the second signal transmission line, the third signal transmission line, and the fourth signal transmission line respectively.

[0006] Further, in the present invention, the installation elevations of the first differential pressure sensor and the second differential pressure sensor are the same.

[0007] Furthermore, in the present invention, the pipe diameters, lengths, and materials of the first sludge discharge branch pipe and the second sludge discharge branch pipe are completely the same and are symmetrically arranged.

[0008] Furthermore, in the present invention, the signal of the liquid level sensor is transmitted into the signal processing system in real time. The signal processing system converts the signal transmitted by the liquid level sensor into a pulse signal and transmits it to the stepping motor. The stepping motor controls the height of the bearing plate through the telescopic rigid rod to ensure that the elevation of the top surface of the bearing plate is always consistent with the liquid level elevation in the second container bucket.

[0009] The present invention also includes a method for using the indoor silt cleaning and conveying test parameter monitoring device. This measuring device can be used to measure the density, flow rate, and output of the slurry in real time. Among them, the calculation formula for the density of the slurry is shown in Formulas (1) and (2), the calculation formula for the total mass of the slurry is shown in Formula (3), and the calculation formula for the total volume of the slurry is shown in Formula (4):

[0010]

[0011] M = 2*(p2′ - ξ*p1′) (3)

[0012]

[0013] Where φ 1 and φ 2 are the resistance coefficients of the front-end pipe and the rear-end pipe respectively, which are dimensionless constants; h is the installation height of the pressure difference sensor, with the unit of m; ρ m1 and ρ m2 are the densities of the slurry in the front-end pipe of the U-tube and the density of the slurry in the rear-end pipe of the U-tube obtained respectively, with the unit of kg / m 3 ; Δp1′ and Δp2′ are the pressure differences measured by the first pressure sensor and the second pressure sensor when transporting the slurry, with the unit of Kpa; g is the acceleration due to gravity, with the unit of m / s 2 ; v is the flow velocity of the liquid in the pipeline, with the unit of m / s; ρ w is the density of clear water, with the unit of kg / m 3 ; ρ m is the average density of the slurry in the U-tube, with the unit of kg / m 3 . M is the total mass of the measured slurry, with the unit of kg; p1′ and p2′ are the pressure values measured by the first pressure sensor and the second pressure sensor respectively when the system transports the slurry, with the unit of Kpa; ξ is the ratio of the impact force of the liquid on the free liquid surface to the impact force on the bearing plate, which is a dimensionless constant; V is the total volume of the measured slurry, with the unit of m 3 ; where D is the inner diameter of the second container bucket 13, with the unit of m; H is the liquid level in the container bucket 13 measured by the liquid level sensor, with the unit of m.

[0014] Among them, the resistance coefficient φ 1 of the front-end pipe of the U-tube and the resistance coefficient φ 2 of the rear-end pipe of the U-tube are calculated according to Formula (5):

[0015]

[0016] Where ρ w is the density of clear water, with the unit of kg / m 3 ; g is the acceleration due to gravity, with the unit of m / s 2; v is the liquid flow velocity in the pipeline, with the unit of m / s and can be measured by a flowmeter; Δp1 and Δp2 are the pressure differences measured by the first pressure sensor and the second pressure sensor respectively when transporting clear water, with the unit of Kpa; φ 1 and φ 2 are the resistance coefficients of the front-end pipe and the rear-end pipe respectively, which are dimensionless constants.

[0017] The calculation formula for the ratio ξ of the impact force of the liquid on the free liquid surface to the impact force on the bearing plate is shown in Formula (6):

[0018]

[0019] ξ is the ratio of the impact force of the liquid on the free liquid surface to the impact force on the bearing plate, which is a dimensionless constant; N is the number of working condition groups set to obtain ξ; i represents the i-th working condition; p1 i is the pressure value measured by the first pressure sensor under the i-th working condition, with the unit of Kpa; p2 i is the pressure value measured by the second pressure sensor under the i-th working condition, with the unit of Kpa.

[0020] In the present invention, the sludge suction pump is located in the dredging water tank for sludge suction, and the sludge discharge outlet of the sludge suction pump is connected to the U-shaped pipe orifice.

[0021] The first differential pressure sensor is installed at the front-end pipe of the U-shaped pipe, and the second differential pressure sensor is installed at the rear-end pipe of the U-shaped pipe. The installation elevations of the first differential pressure sensor and the second differential pressure sensor are the same, and the installation heights of both are H. The tail of the sludge discharge main pipe is connected to two branch pipes. The two branch pipes have the same diameter, length, material, etc., and are symmetrically arranged. The slurry of the first sludge discharge branch pipe flows into the first container bucket, and the slurry of the second sludge discharge branch pipe flows into the second container bucket. The first container bucket is equipped with a stepping motor, and the stepping motor is connected to a telescopic rigid rod. The telescopic rigid rod is connected to the bearing plate, and a pressure sensor is installed between the telescopic rigid rod and the bearing plate. The slurry discharged from the first sludge discharge branch pipe directly acts on the bearing plate and then flows into the first container bucket. A sludge discharge pipe is arranged at the bottom of the first container bucket, and the slurry flowing into the first container bucket is discharged in real time. The slurry discharged from the second sludge discharge branch pipe directly flows into the second container bucket. A pressure sensor is arranged at the bottom of the second container bucket to measure the weight of the slurry flowing into the second container bucket. A liquid level sensor is installed at the top of the second container bucket to monitor the liquid level of the slurry in the second container bucket. The signal of the liquid level sensor is transmitted into the signal processing system in real time, and the signal processing system converts the signal transmitted by the liquid level sensor into a pulse signal and transmits it to the stepping motor. The stepping motor controls the height of the bearing plate through the telescopic rigid rod to ensure that the elevation of the top surface of the bearing plate is always consistent with the liquid level elevation in the second container bucket.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention is reasonably designed and has a simple structure. It not only has low cost and is convenient to use, but also has the advantages of high measurement accuracy and real-time performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0024] Figure 2 is Figure 1 a partially enlarged view of;

[0025] Wherein, 1. test water tank, 2. sludge suction pump, 3. U-shaped pipe, 4. front end pipe of U-shaped pipe, 5. rear end pipe of U-shaped pipe, 6. first differential pressure sensor, 7. second differential pressure sensor, 8. flowmeter, 9. main sludge discharge pipe, 10. first sludge discharge branch pipe, 11. second sludge discharge branch pipe, 12. first container barrel, 13. second container barrel, 14. liquid level gauge, 15. first pressure sensor, 16. second pressure sensor, 17. stepping motor, 18. telescopic rigid rod, 19. drain pipe, 20. bearing plate, 21. first signal transmission line, 22. signal processing system, 23. second signal transmission line, 24. third signal transmission line, 25. fourth signal transmission line, 26. first base, 27. second base. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to make the content of the present invention easier to understand, the technical solution of the present invention will be further explained below in conjunction with specific embodiments. The examples are only used to illustrate the present invention, but the present invention is not limited to this content.

[0027] Embodiment

[0028] The present invention includes a test water tank 1, a sludge suction pump 2, a U-shaped pipe 3, a first differential pressure sensor 6, a second differential pressure sensor 7, a flowmeter 8, a main sludge discharge pipe 9, a first sludge discharge branch pipe 10, a second sludge discharge branch pipe 11, a first container barrel 12, a second container barrel 13, a liquid level gauge 14, a first pressure sensor 15, a second pressure sensor 16, a stepping motor 17, a telescopic rigid rod 18, a drain pipe 19, a bearing plate 20, a first signal transmission line 21, a signal processing system 22, a second signal transmission line 23, a third signal transmission line 24, a fourth signal transmission line 25, a first base 26, and a second base 27; the U-shaped pipe 3 includes a U-shaped pipe front-end pipe 4, a U-shaped pipe bottom pipe, and a U-shaped pipe rear-end pipe 5; the sludge suction pump 2 is arranged in the test water tank 1, and the sludge discharge outlet of the sludge suction pump 2 is connected to the inlet of the U-shaped pipe front-end pipe 4; the outlet of the U-shaped pipe rear-end pipe 5 is connected to the inlet of the main sludge discharge pipe 9, and the outlet of the main sludge discharge pipe 9 is connected to the inlets of the first sludge discharge branch pipe 10 and the second sludge discharge branch pipe 11. The outlets of the first sludge discharge branch pipe 10 and the second sludge discharge branch pipe 11 are respectively arranged directly above the first container barrel 12 and the second container barrel 13; the first container barrel 12 is arranged on the first base 26, the stepping motor 17 is arranged on the outer part of the lower wall surface of the first container barrel 12, the bearing plate 20 is arranged inside the first container barrel 12, one end of the telescopic rigid rod 18 is connected to the stepping motor 17, and the other end of the telescopic rigid rod 18 passes through the lower wall surface of the first container barrel 12 and is connected to the bearing plate 20. The first pressure sensor 15 is arranged between the telescopic rigid rod 18 and the bearing plate 20, and the drain pipe 19 is arranged on the bottom side wall of the first container barrel 12; the second pressure sensor 16 is arranged on the second base 27, the second container barrel 13 is arranged on the second pressure sensor 16, and the liquid level sensor 14 is arranged on the top of the second container barrel 13; the first differential pressure sensor 6 is arranged on the U-shaped pipe front-end pipe 4, the second differential pressure sensor 7 is arranged on the U-shaped pipe rear-end pipe 5, and the flowmeter 8 is arranged on the U-shaped pipe bottom pipe; the signal processing system 22 is connected to the liquid level gauge 14, the second pressure sensor 16, the stepping motor 17, and the first pressure sensor 15 through the first signal transmission line 21, the second signal transmission line 23, the third signal transmission line 24, and the fourth signal transmission line 25 respectively. The installation elevations of the first differential pressure sensor 6 and the second differential pressure sensor 7 are the same; the pipe diameters, lengths, and materials of the first sludge discharge branch pipe 10 and the second sludge discharge branch pipe 11 are completely the same and are symmetrically arranged.

[0029] The density, total mass, and total volume of the slurry, and the specific measurement method is as follows:

[0030] Fill the test water tank 1 with clear water, and the sludge suction pump 2 pumps clear water for a period of time so that there is a certain liquid level of water in the second container barrel 13;

[0031] By adjusting the rotation speed of the sludge suction pump 2, the working conditions at different clear water transportation velocities in the pipeline are set. At this time, the pressure difference measured by the first pressure difference sensor 6 is Δp1; the pressure difference measured by the second pressure difference sensor 7 is Δp2; the resistance coefficient φ of the front pipe 4 of the U-shaped pipe can be obtained through the following formula (5). 1 and the resistance coefficient of the rear pipe 5 of the U-shaped pipe and φ 2 ; where ρ w is the density of clear water, g is the acceleration due to gravity, and v is the flow velocity of the liquid in the pipeline, which can be measured by a flow meter.

[0032]

[0033] Among them, ρ w is the density of clear water, with the unit of kg / m 3 ; g is the acceleration due to gravity, with the unit of m / s 2 ; v is the flow velocity of the liquid in the pipeline, with the unit of m / s, which can be measured by a flow meter. Δp1 and Δp2 are the pressure differences measured by the first pressure sensor 15 and the second pressure sensor 16 respectively when transporting clear water, with the unit of Kpa; φ 1 and φ 2 are the resistance coefficients of the front pipe and the rear pipe respectively, which are dimensionless constants.

[0034] Fill the second container barrel 13 with water and zero the value of the second pressure sensor 16; adjust the elevation of the top surface of the bearing plate 20 in the first container barrel 12 to be the same as the liquid level in the second container barrel 13, and measure the value p1 of the first pressure sensor 15 and the value p2 of the second pressure sensor 16 at different flow velocities, with the unit of Kpa. For convenience of use, ignoring the minor effects, assume that the ratio ξ of the impact force of the liquid on the free liquid surface to the impact force on the bearing plate 20 is independent of the liquid density. Further, use the average value of this coefficient at different flow velocities as the reference value. Assume that a total of N groups of working conditions are set, then

[0035]

[0036] ξ is the ratio of the impact force of the liquid on the free liquid surface to the impact force on the bearing plate, which is a dimensionless constant; N is the number of working condition groups set to obtain ξ; i represents the i-th working condition; p1 i is the pressure value measured by the first pressure sensor 15 in the i-th working condition, with the unit of Kpa; p2 i is the pressure value measured by the second pressure sensor 16 in the i-th working condition, with the unit of Kpa.

[0037] After the calibration of the clear water working conditions is completed, drain all the water in the first container barrel 12 and the second container barrel 13, and zero all the values of the first pressure sensor 15 and the second pressure sensor 16.

[0038] The test water tank 1 is filled with mud. The mud pump 2 sucks the mud and transports it through the pipeline. At this time, the pressure difference measured by the first pressure difference sensor 6 is Δp1'; the pressure difference measured by the second pressure difference sensor 7 is Δp2'; the flowmeter 8 measures the mud flow rate in the pipeline as v. Then, the mud density ρ in the front-end pipe 5 of the U-tube can be obtained from formula (1). m1 and the mud density ρ in the rear-end pipe 6 of the U-tube m2 ; the average mud density in the U-tube 3 can be obtained from formula (2).

[0039]

[0040] Among them, φ 1 and φ 2 are the resistance coefficients of the front-end pipe and the rear-end pipe respectively, which are dimensionless constants and are obtained by the above-mentioned calibration with clear water; h is the installation height of the pressure difference sensor, in m; ρ m1 and ρ m2 are the mud densities in the front-end pipe of the U-tube and the rear-end pipe of the U-tube obtained respectively, in kg / m 3 ; Δp1' and Δp2' are the pressure differences measured by the first pressure sensor 15 and the second pressure sensor 16 when transporting mud, in Kpa; g is the acceleration of gravity, in m / s 2 ; v is the flow rate of the liquid in the pipeline, in m / s; ρ w is the density of clear water, in kg / m 3 ; ρ m is the average mud density in the U-tube, in kg / m 3 .

[0041] The mud discharged from the sludge discharge branch pipe acts on the liquid surfaces in the bearing plate 20 and the second container barrel 13 respectively. At this time, the pressure value measured by the first pressure sensor 15 is p1'; the pressure value measured by the second pressure sensor 16 is p2'; the liquid level sensor 14 measures the mud height in the second container barrel 13 as H. Then, the total mass of the mud sucked by the mud pump 2 can be obtained through formula (3), and the total volume of the mud sucked by the mud pump 2 can be obtained through formula (4).

[0042] M = 2 * (p2' - ξ * p1') (3)

[0043]

[0044] Among them, M is the measured total mass of the mud, in kg; p1' and p2' are the pressure values measured by the first pressure sensor 15 and the second pressure sensor 16 respectively when the system transports mud, in Kpa; ξ is the ratio of the impact force of the liquid on the free liquid surface to the impact force on the bearing plate, which is a dimensionless constant; V is the measured total volume of the mud, in m 3; where D is the inner diameter of the second container barrel 13, in m; H is the liquid level in the container barrel 13 measured by the liquid level sensor, in m.

[0045] It should be noted that the above are only preferred embodiments of the present invention, and there is no formal limitation on the present invention. The technical features described in the embodiments of the present invention or the combination of technical features should not be considered isolated. They can be combined with each other to achieve better technical effects. Technologies, methods, and devices known to those of ordinary skill in the relevant fields are not discussed in detail, but in appropriate cases, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. An indoor dredging and transportation test parameter monitoring device, comprising a test water tank and a dredging pump, characterized in that: It also includes a U-shaped tube, a No. 1 differential pressure sensor, a No. 2 differential pressure sensor, a flow meter, a mud discharge main pipe, a No. 1 mud discharge branch pipe, a No. 2 mud discharge branch pipe, a No. 1 container barrel, a No. 2 container barrel, a level meter, a No. 1 pressure sensor, a No. 2 pressure sensor, a stepper motor, a retractable rigid rod, a drain pipe, a pressure plate, a No. 1 signal transmission line, a signal processing system, a No. 2 signal transmission line, a No. 3 signal transmission line, a No. 4 signal transmission line, a first base, and a second base; The U-shaped tube includes a front tube of the U-shaped tube, a bottom tube of the U-shaped tube, and a rear tube of the U-shaped tube; a sludge suction pump is arranged in the test water tank, and the sludge discharge outlet of the sludge suction pump is connected to the inlet of the front tube of the U-shaped tube; the outlet of the rear tube of the U-shaped tube is connected to the inlet of the sludge discharge main pipe, and the outlet of the sludge discharge main pipe is connected to the inlet of the No. 1 sludge discharge branch pipe and the No. 2 sludge discharge branch pipe, and the outlets of the No. 1 sludge discharge branch pipe and the No. 2 sludge discharge branch pipe are arranged directly above the No. 1 container barrel and the No. 2 container barrel respectively; The No. 1 container barrel is arranged on the first base, the stepper motor is arranged on the outer side of the lower wall of the No. 1 container barrel, the pressure plate is arranged inside the No. 1 container barrel, one end of the telescopic rigid rod is connected to the stepper motor, the other end of the telescopic rigid rod passes through the lower wall of the No. 1 container barrel and is connected to the pressure plate, the No. 1 pressure sensor is arranged between the telescopic rigid rod and the pressure plate, and the drain pipe is arranged on the bottom side wall of the No. 1 container barrel; The second pressure sensor is arranged on the second base, the second container barrel is arranged on the second pressure sensor, and the liquid level sensor is arranged on the top of the second container barrel; The first differential pressure sensor is arranged at the front end of the U-shaped tube, the second differential pressure sensor is arranged at the rear end of the U-shaped tube, and the flow meter is arranged at the bottom of the U-shaped tube; The signal processing system is connected to the liquid level meter, the second pressure sensor, the stepper motor and the first pressure sensor respectively through the first signal transmission line, the second signal transmission line, the third signal transmission line and the fourth signal transmission line.

2. The indoor dredging and transportation test parameter monitoring device according to claim 1 is characterized in that The installation elevations of the No. 1 differential pressure sensor and the No. 2 differential pressure sensor are the same.

3. The indoor dredging and transportation test parameter monitoring device according to claim 1 is characterized in that The pipe diameters, lengths and materials of the No. 1 mud discharge branch pipe and the No. 2 mud discharge branch pipe are completely the same, and are symmetrically arranged.

4. The indoor dredging and transportation test parameter monitoring device according to claim 1 is characterized in that The liquid level sensor signal is transmitted to the signal processing system in real time. The signal processing system converts the signal transmitted by the liquid level sensor into a pulse signal and transmits it to the stepper motor. The stepper motor controls the height of the pressure plate through the retractable rigid rod to ensure that the elevation of the top surface of the pressure plate is always consistent with the liquid level elevation in the second container barrel.

5. The method for using the indoor dredging and transportation test parameter monitoring device according to claim 1 is characterized in that This measuring device can be used to measure the density, total mass and total volume of mud in real time, wherein the calculation formula of the density of mud is shown in formulas (1) and (2), the calculation formula of the total mass of mud is shown in formula (3), and the calculation formula of the total volume of mud is shown in formula (4): M=2*(p2′-ξ*p1′) (3) Among them, φ1 and φ2 are the resistance coefficients of the front and rear pipes, respectively, which are dimensionless constants; h is the installation height of the differential pressure sensor, in meters; ρ m1 and ρ m2 are the mud density in the front end of the U-shaped tube and the mud density in the rear end of the U-shaped tube, respectively, in kg / m 3 ; Δp1′ and Δp2′ are the pressure difference values ​​measured by pressure sensor No. 1 and pressure sensor No. 2 when conveying mud, the unit is Kpa; g is the acceleration of gravity, the unit is m / s 2 ; v is the flow rate of the liquid in the pipeline, in m / s; ρ w is the density of clean water, in kg / m 3 ρ m is the average density of the mud in the U-tube, in kg / m 3 ; M is the measured total mass of mud, in kg; p1′ and p2′ are the pressure values ​​measured by the No. 1 pressure sensor and the No. 2 pressure sensor when the system transports mud, in Kpa; ξ is the ratio of the impact force of the liquid on the free surface to the impact force on the pressure plate, which is a dimensionless constant; V is the measured total volume of mud, in m 3 ; D is the inner diameter of the second container barrel 13, in m; H is the liquid level in the container barrel 13 measured by the liquid level sensor, in m; Among them, the resistance coefficient φ1 of the front end tube of the U-shaped tube and the resistance coefficient φ2 of the rear end tube of the U-shaped tube are calculated according to formula (5): Among them, ρ w is the density of clean water, in kg / m 3 ; g is the acceleration due to gravity, in m / s 2 ; v is the flow rate of the pipeline liquid, in m / s, which can be measured by a flow meter; Δp1 and Δp2 are the pressure difference values ​​measured by the No. 1 pressure sensor and the No. 2 pressure sensor when conveying clean water, in Kpa; φ1 and φ2 are the resistance coefficients of the front and rear pipes, respectively, which are dimensionless constants; The calculation formula for the ratio ξ of the impact force of the liquid on the free surface to the impact force on the pressure plate is shown in formula (6): Where, ξ is the ratio of the impact force of the liquid on the free surface to the impact force on the pressure plate, which is a dimensionless constant; N is the number of working condition groups set to obtain ξ; i represents the i-th working condition; p1 i is the pressure value measured by pressure sensor No. 1 in the i-th working condition, in Kpa; p2 i It is the pressure value measured by the No.2 pressure sensor in the i-th working condition, in Kpa.

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