Mud index detection device and mud index detection method

Abstract

The present application relates to the field of slurry quality detection in slurry shield construction, especially a slurry index detection device and a matching slurry index detection method in shield construction. It aims to solve the problem that the shield main machine room cannot obtain the slurry index parameter value in real time in the prior art. The present application comprises a detection barrel, a water inlet pipe is arranged at the top of the detection barrel, a pipeline group is connected to the bottom of the detection barrel, the pipeline group comprises a water / slurry inlet pipe and a slurry discharge pipe which are arranged in parallel, the detection barrel is provided with a slurry viscosity detection device, a slurry colloid rate detection device, a slurry specific gravity detection device and a slurry acid-base degree detection device, the detection barrel comprises an inner barrel and an outer barrel which are coaxially sleeved, a sleeve is coaxially installed in the inner barrel, a coaxial measuring rotor is arranged in the sleeve, the rotor is connected to a power source which drives the rotor to rotate, a plurality of pressure gauges are arranged at different heights of the inner barrel, and a pressure measurement mechanism is arranged at the bottom of the inner barrel. The advantages are that the slurry index can be automatically detected, automatically checked and automatically cleaned, the information synchronization rate is high, and the real-time and rapid adjustment of production parameters is facilitated.

Description

Technical Field

[0001] This invention relates to the field of mud quality testing in slurry shield tunneling, and in particular to a mud index testing device and a matching mud index testing method for shield tunneling. Background Technology

[0002] The shield tunneling method has been widely used in tunnel engineering construction, including municipal subway tunnels, highway tunnels, and tunnels crossing rivers and seas, effectively controlling surface settlement and deformation of surrounding buildings and structures. Among them, slurry shield tunneling machines are the most commonly used equipment in shield tunneling, accounting for more than 80% of shield tunneling in China.

[0003] In slurry shield tunneling, a slurry circulation system transports qualified slurry to the slurry chamber. Under pressure within the chamber, the slurry maintains the stability of the excavation face and carries away rock and soil debris to the slurry separation plant, much like blood in the human body. Therefore, slurry quality (viscosity, specific gravity, colloid content, pH) is crucial for the safe and efficient operation of slurry shield tunneling. During tunneling, workers regularly take samples of slurry from the circulation system for quality testing. Before each ring of tunneling, the slurry quality is checked to ensure it meets the target specifications. During the ring tunneling process, changes in slurry quality are monitored in real time. If the slurry quality indicators do not meet the construction requirements, measures such as adding water, discarding slurry, or stopping tunneling must be taken as soon as possible until the target specifications are met.

[0004] Currently, the testing of mud quality indicators in slurry shield tunneling still relies on manual methods. Workers need to periodically and continuously extract mud from the mud circulation system pipelines and then use instruments such as mud hydrometers, Marsh funnel viscometers, and filtration loss meters for testing. This process requires at least two people working together. Simultaneously, the test results need to be transmitted to the shield tunneling control room via network (such as WeChat), where the shield operator determines whether to adjust the tunneling parameters based on the results. Therefore, mud quality indicator testing in slurry shield tunneling is time-consuming and labor-intensive, completely lacking automation and intelligent capabilities.

[0005] Technicians believe that the efficiency of current mud quality index testing methods affects their need for rapid access to mud index information, and that it is necessary to develop an automated and intelligent mud index testing device. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the prior art where mud index detection is time-consuming and labor-intensive, and the shield tunneling machine room cannot obtain mud index parameters in real time.

[0007] The specific solution of this invention is:

[0008] Design a mud index testing device for slurry shield tunneling, including a testing bucket. The top of the testing bucket is equipped with a water inlet pipe, and the bottom is connected to a pipe assembly. The pipe assembly includes a slurry inlet pipe and a slurry outlet pipe connected in parallel with the bottom outlet of the testing bucket. The testing bucket is equipped with a mud viscosity testing mechanism, a mud colloid rate testing mechanism, a mud specific gravity testing mechanism, and a mud pH testing mechanism to test sample index parameters. A bottom water inlet pipe branch is connected in parallel to the slurry inlet pipe. The inlet of the slurry inlet pipe is connected to the slurry outlet pipe of the shield tunneling equipment. Flow meters are installed on the slurry inlet pipe, the water inlet pipe, and the bottom water inlet pipe branch.

[0009] The testing tank includes an inner tank and an outer tank that are coaxially fitted together. A sleeve is also coaxially installed inside the inner tank. A coaxial rotor is provided inside the sleeve. The rotor is connected to a power source that drives its rotation. A motor protection mechanism to prevent mud from seeping in is provided on the top of the rotor.

[0010] The mud specific gravity detection mechanism includes a pressure measuring mechanism at the bottom of the inner barrel, the pressure measuring mechanism includes a ring-shaped weighing gauge, and the inner wall of the inner barrel and the surface of the sleeve are coated with a non-stick coating.

[0011] The mud viscosity detection mechanism includes a torque measuring element installed on the main shaft of the power source and a coaxial rotor at the bottom of the power source;

[0012] The mud colloid content detection mechanism includes multiple pressure gauges installed at different heights on one side of the inner bucket;

[0013] The mud pH testing device includes pH testing elements installed inside the testing tank.

[0014] A water-passing top cover is provided between the inner tub and the sleeve. The water-passing top cover has at least three through holes and an annular guide groove between the through holes. The outlet of the water inlet pipe is located above the guide groove. A retaining ring that mates with the inner tub is provided below the water-passing top cover. The outer diameter of the water-passing top cover is larger than the outer diameter of the retaining ring to form a brim.

[0015] The inner barrel has a cutout for observing and detecting the inside of the barrel, and corresponding scale lines are provided at the cutout positions of the inner barrel.

[0016] The inner cylinder and the outer cylinder are provided with an anti-torsion groove to restrict their rotational freedom, and the bottom of the inner cylinder is provided with a cone-shaped funnel-shaped discharge port that is larger at the top and smaller at the bottom.

[0017] The feed inlet of the inner cylinder is connected to the pipe assembly via a corrugated pipe. The corrugated pipe is located at the center of the hollow ring of the circular weighing scale, and the height of the weighing scale is between the maximum and minimum length of the corrugated pipe.

[0018] The pipeline assembly is equipped with a solenoid valve to control the flow of water or slurry.

[0019] The motor protection mechanism includes a barrel-shaped floating body. The floating body has a bushing that engages with the constraint barrel. The floating body has a sliding shaft with the same outer diameter and coaxial installation position as the main shaft of the power source. A constraint barrel is fitted around the sliding shaft and the main shaft of the power source to allow the floating body to float along the axis of the constraint barrel. The top of the constraint barrel is fixed to the main shaft of the power source. A soft rubber ring seals the water-passing top cover and the inner barrel.

[0020] A method for detecting mud parameters, using a mud parameter detection device used in shield tunneling construction, includes the following steps:

[0021] (1) Flushing and resetting: Municipal purified water flows into the test tank from top to bottom to rinse the inner cavity of the test tank. The municipal purified water flows out from the bottom of the test tank until there are no foreign objects in the water. Then the water inlet is closed and the water continues to flow out until the water in the test tank is clear.

[0022] (2) Water inlet calibration: Municipal purified water flows into the test tank from bottom to top until the water level in the test tank reaches the set height. Then, the water inlet is closed, and the mud viscosity test mechanism, mud colloid rate test mechanism, and mud specific gravity test mechanism are started to detect the viscosity value a of the tap water, the colloid rate array {d1,d2,......,dn}, until the theoretical value of the value in the array is constant, that is, the pressure value received by each pressure gauge is D, and the specific gravity c. Then, the water inlet is closed, and the water continues to flow out until the water in the test tank is drained. When the viscosity value a, the colloid rate array {d1,d2,......,dn}, and the specific gravity c reach the fixed value of purified water, the measurement is considered accurate. Otherwise, each test mechanism needs to be checked.

[0023] (3) Slurry inlet detection: The water inlet of the pipeline is switched to the slurry inlet, which is connected to the mud circulation pipe of the construction pipeline. The slurry inlet is turned off when the mud level in the detection tank reaches the set height. The mud viscosity detection mechanism, mud colloid rate detection mechanism, mud specific gravity detection mechanism, and mud acidity detection mechanism are started to detect the mud viscosity ŋ, colloid rate, density q, and mud acidity f.

[0024] The formula for calculating the specific gravity of mud is: mud density q=G / v, where G comes from the measurement result of the weighing gauge, v comes from the volume of mud in the test bucket, and the position of the mud is observed from the scale at the hollow part or the scale on the transparent test bucket.

[0025] A torque measuring mechanism is installed on the output shaft of the motor to measure the torque M during the rotation of the main shaft, and the viscosity ŋ = M / 4πhwi(1 / ri2-1 / ra2).

[0026] The method for detecting the colloid content of the mud includes: after the float rotates, sampling the measurement results of each pressure gauge (12) at 1 minute, 5 minutes, and 10 minutes respectively to form the pressure result array {a1,a2,......,an} for the first minute, the pressure result array {b1,b2,......,bn} for the fifth minute, and the pressure result array {c1,c2,......,cn} for the tenth minute. The values ​​of pressure less than D in each array are taken, and the corresponding scale aL, bL, cL are read to obtain the corresponding colloid content; the colloid content at 1 minute pressure is a = (h-aL) / h; the colloid content at 5 minutes pressure is b = (h-bL) / h; the colloid content at 10 minutes pressure is c = (h-cL) / h.

[0027] (4) Discharge: Turn on the discharge and continue discharging until the water in the test tank is drained. When the mud viscosity in step (3) is greater than 250 cps, turn on step (1) within 1 minute after discharging to prevent clumping.

[0028] The beneficial effects of this invention are as follows:

[0029] Mud index testing is time-saving and labor-saving, with a high degree of automation and intelligence and a high information synchronization rate, which is conducive to the real-time and rapid adjustment of production parameters.

[0030] Adding an electromagnetic control valve to the pipeline facilitates rapid switching between slurry and water inlet, resulting in high measurement accuracy and low manual labor intensity.

[0031] The design of the water-filled top cover facilitates the spraying of clean water, enabling the calibration of measuring equipment;

[0032] The anti-torsion groove design facilitates positioning between the inner and outer drums, further improving measurement accuracy.

[0033] In this application, multiple parameters can be measured in a single measurement, with high accuracy and efficiency. Attached Figure Description

[0034] Figure 1 This is a front view of the structure of the present invention;

[0035] Figure 2 This is a top view of the structure of the present invention;

[0036] Figure 3 This is a left view of the structure of the present invention;

[0037] Figure 4 This is a right view of the structure of the present invention;

[0038] Figure 5 yes Figure 4 Sectional view along line AA;

[0039] Figure 6 yes Figure 1Axonometric sectional view along the BB direction;

[0040] Figure 7 This is a three-dimensional view of the structure in this invention;

[0041] Figure 8 This is a top view of the water-filled roof;

[0042] Figure 9 This allows us to see the cross-sectional view of the anti-torsion groove;

[0043] Figure 10 This is a schematic diagram of the data upon which the viscosity calculation formula is based;

[0044] Figure 10 The bottom point of the cone is taken as the midpoint of the cone's height;

[0045] The components in the diagram are named as follows: 1. Inlet pipe; 2. Inner tank; 3. Outer tank; 4. Sleeve; 5. Weighing gauge; 6. Power source; 7. pH detection element; 8. Hollowed-out section; 9. Bellows; 10. Soft rubber ring; 11. Rotor; 12. Pressure gauge; 13. Through hole; 14. Flow guide groove; 15. Anti-torsion groove; 16. Pipe assembly; 17. Clamping ring; 18. Constraint bucket. Detailed Implementation

[0046] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. Example

[0047] A device for detecting mud parameters during shield tunneling construction, see [link / reference] Figures 1 to 10 The design includes a testing barrel, with a water inlet pipe 1 at the top and a pipe assembly 16 at the bottom. The pipe assembly 16 includes a slurry inlet pipe and a slurry outlet pipe connected in parallel with the bottom outlet of the testing barrel. The testing barrel is equipped with a mud viscosity testing mechanism, a mud colloid rate testing mechanism, a mud specific gravity testing mechanism, and a mud pH testing mechanism to test sample parameters. A bottom water inlet pipe 1 branch is connected in parallel to the slurry inlet pipe. The inlet of the slurry inlet pipe is connected to the slurry outlet pipe of the tunnel boring machine. Flow meters are installed on the slurry inlet pipe, the water inlet pipe 1, and the bottom water inlet pipe 1 branch.

[0048] The testing bucket includes an inner bucket 2 and an outer bucket 3 that are coaxially fitted together. A sleeve 4 is also coaxially installed inside the inner bucket 2. A coaxial rotor 11 is provided inside the sleeve 4. The rotor 11 is connected to a power source 6 that drives it to rotate. A motor protection mechanism to prevent mud from seeping into the rotor 11 is provided on the top of the rotor 11.

[0049] The mud specific gravity detection mechanism includes a pressure measuring mechanism at the bottom of the inner barrel 2. The pressure measuring mechanism includes a ring-shaped weighing scale 5. The inner wall of the inner barrel 2 and the surface of the sleeve 4 are coated with a non-stick coating, which can effectively prevent the mud from sticking to the measuring components.

[0050] The mud viscosity detection mechanism includes a torque measuring element installed on the main shaft of the power source 6 and a coaxial rotor 11 at the bottom of the power source 6. The torque measuring element adopts existing technology to obtain the required parameter M.

[0051] The mud colloid content detection mechanism includes multiple pressure gauges 12 installed at different heights on one side of the inner bucket 2;

[0052] The mud pH testing mechanism includes pH testing element 7 installed inside the testing tank.

[0053] A water-passing top cover is provided between the inner tub 2 and the sleeve 4. The water-passing top cover has at least three through holes 13, and an annular guide groove 14 is provided between the through holes 13. The outlet of the water inlet pipe 1 is located above the guide groove 14. A retaining ring 17 that mates with the inner tub 2 is provided below the water-passing top cover. The outer diameter of the water-passing top cover is larger than the outer diameter of the retaining ring 17 to form a brim. The brim design further ensures installation accuracy and sealing performance.

[0054] The inner barrel 2 has a hollowed-out opening 8 for observing and detecting the inside of the barrel, and a scale line is provided at the corresponding position of the hollowed-out opening 8 in the inner barrel 2.

[0055] The inner cylinder and the outer cylinder 3 are provided with an anti-torsion groove 15 to restrict their rotational freedom, and the bottom of the inner cylinder 2 is provided with a cone-shaped funnel-shaped discharge port that is larger at the top and smaller at the bottom.

[0056] The feed inlet of the inner cylinder is connected to the pipe assembly 16 via a bellows 9. The bellows 9 is located at the center of the hollow ring of the circular weighing scale 5, and the height of the weighing scale 5 is between the maximum and minimum length of the bellows 9.

[0057] The pipeline assembly 16 is equipped with a solenoid valve to control the flow of water or slurry.

[0058] The motor protection mechanism includes a barrel-shaped floating body with a retaining ring that engages with the constraint barrel. The floating body also has a sliding shaft with the same outer diameter and coaxial installation position as the main shaft of the power source 6. A constraint barrel 18 is fitted around the sliding shaft and the main shaft of the power source 6 to allow the floating body to float along the axis of the constraint barrel 18. The top of the constraint barrel 18 is fixed to the main shaft of the power source 6. A screw is fixed to the water-passing top cover. During operation, the rotor 11 can rotate with the motor main shaft without any restriction on its rotational freedom, effectively forming a floating valve body to prevent mud from rising and damaging the motor main shaft. Simultaneously, the size design does not affect drainage or slurry discharge, and the rotor will not detach from the rotating drum during slurry discharge.

[0059] A soft rubber ring 10 is provided between the water-passing top cover and the inner tank 2 for sealing, improving sealing performance. Simultaneously, the design of the water-passing top cover forms one inlet and three outlets, facilitating faster and more even water injection. The injected water creates a spray effect, facilitating better rinsing of the inner wall of the detection device.

[0060] A method for detecting mud parameters, using the aforementioned mud parameter detection device for shield tunneling, includes the following steps:

[0061] (1) Flushing and resetting: Municipal purified water flows into the test tank from top to bottom to rinse the inner cavity of the test tank. The municipal purified water flows out from the bottom of the test tank until there are no foreign objects in the water. Then the water inlet is closed and the water continues to flow out until the water in the test tank is clear.

[0062] (2) Water inlet calibration: Municipal purified water flows into the test tank from bottom to top until the water level in the test tank reaches the set height. Then, the water inlet is closed, and the mud viscosity test mechanism, mud colloid rate test mechanism, and mud specific gravity test mechanism are started to detect the viscosity value a of the tap water, the colloid rate array {d1,d2,......,dn}, until the theoretical value of the value in the array is constant, that is, the pressure value received by each pressure gauge 12 is D, and the specific gravity c. Then, the water inlet is closed, and the water continues to flow out until the water in the test tank is drained. When the viscosity value a, the colloid rate array {d1,d2,......,dn}, and the specific gravity c reach the fixed value of purified water, the measurement is considered accurate. Otherwise, each test mechanism needs to be checked.

[0063] (3) Slurry inlet detection: The water inlet of the pipeline is switched to the slurry inlet, which is connected to the mud circulation pipe of the construction pipeline. The slurry inlet is turned off when the mud level in the detection tank reaches the set height. The mud viscosity detection mechanism, mud colloid rate detection mechanism, mud specific gravity detection mechanism, and mud acidity detection mechanism are started to detect the mud viscosity ŋ, colloid rate, density q, and mud acidity f.

[0064] The formula for calculating the specific gravity of mud is: mud density q=G / v, where G comes from the measurement result of the weighing scale 5, v comes from the volume of mud in the test bucket, and the position of the mud is observed from the scale at the cutout 8 or the scale on the transparent test bucket.

[0065] A torque measuring mechanism is installed on the output shaft of the motor to measure the torque M during the rotation of the main shaft, and the viscosity ŋ = M / 4πhwi(1 / ri2-1 / ra2).

[0066] The method for detecting the colloid content of the mud includes: after the rotor 11 stops, sampling the measurement results of each pressure gauge 12 at 1 minute, 5 minutes, and 10 minutes respectively, forming a pressure result array {a1,a2,...,an} for the first minute, a pressure result array {b1,b2,...,bn} for the fifth minute, and a pressure result array {c1,c2,...,cn} for the tenth minute. Values ​​with pressure less than D in each array are selected, and the corresponding scale values ​​aL, bL, and cL are read to obtain the corresponding colloid content; the colloid content at one minute pressure is a = (h - aL) / h; the colloid content at five minutes pressure is b = (h - bL) / h; and the colloid content at ten minutes pressure is c = (h - cL) / h.

[0067] Slurry discharge: Turn on the slurry discharge and continue discharging until the slurry in the test tank is completely drained. When the slurry viscosity in step (3) is greater than 250 cps, turn on step (1) within 1 minute after discharging to prevent clumping. Ensure timely rinsing when the viscosity is high to prevent material clumping from affecting the stability of subsequent tests.

[0068] In a specific embodiment, the bottom of the rotor 11 is provided with an anti-clogging groove to prevent the liquid outlet from being blocked by the bottom of the rotor 11.

[0069] During the measurement process, water is first introduced into the top for flushing. After flushing and drainage, water is introduced into the bottom to measure reference parameters. After drainage, slurry is introduced to measure the slurry information during shield tunneling.

[0070] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for detecting mud parameters during slurry shield tunneling, characterized in that: The test chamber includes a test barrel, with a water inlet pipe (1) at the top and a pipe assembly (16) at the bottom. The pipe assembly (16) includes a slurry inlet pipe and a slurry outlet pipe connected in parallel with the bottom outlet of the test barrel. The test barrel is equipped with a mud viscosity testing mechanism, a mud colloid rate testing mechanism, a mud specific gravity testing mechanism, and a mud pH testing mechanism to test sample parameters. A branch of the bottom water inlet pipe (1) is connected in parallel to the slurry inlet pipe. The inlet of the slurry inlet pipe is connected to the slurry outlet pipe of the tunnel boring machine. Flow meters are provided on the slurry inlet pipe, the water inlet pipe (1), and the branch of the bottom water inlet pipe (1). The testing bucket includes an inner bucket (2) and an outer bucket (3) that are coaxially fitted together. A sleeve (4) is also coaxially installed inside the inner bucket (2). A coaxial rotor (11) is provided inside the sleeve (4). The rotor (11) is connected to a power source (6) that drives it to rotate. A motor protection mechanism to prevent mud from seeping into the top of the rotor (11) is provided. The mud specific gravity detection mechanism includes a pressure measuring mechanism at the bottom of the inner barrel (2), the pressure measuring mechanism includes a ring-shaped weighing scale (5), and the inner wall of the inner barrel (2) and the surface of the sleeve (4) are coated with a non-stick coating. The mud viscosity detection mechanism includes a torque measuring element installed on the main shaft of the power source (6) and a coaxial rotor (11) at the bottom of the power source (6). The mud colloid content detection mechanism includes multiple pressure gauges (12) installed at different heights on one side of the inner barrel (2). The mud pH testing mechanism includes a pH testing element (7) installed inside the testing tank. The motor protection mechanism includes a barrel-shaped floating body, on which a retaining ring is provided to cooperate with the constraint barrel (18) in a bushing fit. The floating body is provided with a sliding shaft, which has the same outer diameter as the main shaft of the power source (6) and is installed coaxially. The constraint barrel (18) is fitted around the sliding shaft and the main shaft of the power source (6) to enable the floating body to float along the axial direction of the constraint barrel (18). The top of the constraint barrel (18) is fixed on the main shaft of the power source (6).

2. The mud index detection device for shield tunneling as described in claim 1, characterized in that: A water-passing top cover is provided between the inner barrel (2) and the sleeve (4). The water-passing top cover has at least 3 through holes (13). An annular guide groove (14) is provided between the through holes (13). The outlet of the water inlet pipe (1) is located above the guide groove (14). A retaining ring (17) that cooperates with the inner barrel (2) is provided below the water-passing top cover. The outer diameter of the water-passing top cover is larger than the outer diameter of the retaining ring (17) to form a brim.

3. The mud index detection device for shield tunneling as described in claim 2, characterized in that: The inner barrel (2) is provided with a hollow (8) for observing and detecting the inside of the barrel, and a scale line is provided at the position of the hollow (8) in the inner barrel (2).

4. The mud index detection device for shield tunneling as described in claim 3, characterized in that: The inner cylinder and the outer cylinder (3) are provided with an anti-torsion groove (15) to restrict their rotational freedom, and the bottom of the inner cylinder (2) is provided with a cone-shaped funnel-shaped discharge port that is larger at the top and smaller at the bottom.

5. The mud index detection device for shield tunneling as described in claim 4, characterized in that: The feed inlet of the inner cylinder is connected to the pipe assembly (16) via a corrugated pipe (9). The corrugated pipe (9) is located at the center of the hollow ring of the circular weighing scale (5), and the height of the weighing scale (5) is between the maximum and minimum length of the corrugated pipe (9).

6. The mud index detection device for shield tunneling as described in claim 5, characterized in that: The pipeline assembly (16) is equipped with a solenoid valve to control the flow of water or slurry.

7. The mud index detection device for shield tunneling as described in claim 1, characterized in that: A soft rubber ring (10) is provided between the water-passing top cover and the inner barrel (2) for sealing.

8. A method for detecting mud indexes, using the mud index detection device for shield tunneling as described in claim 1, characterized in that, Includes the following steps: Flushing and resetting: Municipal purified water flows into the test tank from top to bottom to rinse the inner cavity of the test tank. The municipal purified water flows out from the bottom of the test tank until there are no foreign objects in the water. Then, the water inlet is closed and the water continues to flow out until the water in the test tank is completely drained. Water inlet calibration: Municipal purified water flows into the test tank from bottom to top until the water level in the test tank reaches the set height. Then, the water inlet is closed, and the mud viscosity test mechanism, mud colloid rate test mechanism, and mud specific gravity test mechanism are started to detect the viscosity value a of the tap water and the colloid rate array {d1,d2,......,dn} until the theoretical value of the value in the array is constant, that is, the pressure value received by each pressure gauge (12) is D and the specific gravity is c. Then, the water inlet is closed and the water continues to flow out until the water in the test tank is clear. When the viscosity value a, colloid rate array {d1,d2,......,dn}, and specific gravity c reach the fixed value of purified water, the measurement is considered accurate. Otherwise, each test mechanism needs to be checked. Slurry inlet detection: The water inlet of the pipeline is switched to the slurry inlet, which is connected to the mud circulation pipe of the construction pipeline. The slurry inlet is turned off when the mud level in the detection tank reaches the set height. The mud viscosity detection mechanism, mud colloid content detection mechanism, mud specific gravity detection mechanism, and mud pH detection mechanism are then activated to detect the mud viscosity ŋ, colloid content, density q, and mud pH f. The formula for calculating the specific gravity of mud is: mud density q=G / v, where G comes from the measurement result of the weighing scale (5), v comes from the volume of mud in the test bucket, and the position of the mud is observed from the scale at the hollow (8) or the scale on the transparent test bucket. A torque measuring mechanism is installed on the output shaft of the motor to measure the torque M during the rotation of the main shaft. Viscosity ŋ = M / 4πhwi(1 / ri) 2 -1 / ra 2 ); The method for detecting the colloid content of the mud includes: after the rotor (11) stops, sampling the measurement results of each pressure gauge (12) at 1 minute, 5 minutes and 10 minutes respectively to form the pressure result array {a1,a2,......,an} for the first minute, the pressure result array {b1,b2,......,bn} for the fifth minute, and the pressure result array {c1,c2,......,cn} for the tenth minute. Take the value points in each array where the pressure is less than D, read the corresponding point scale aL, bL, cL, and obtain the corresponding colloid content; the colloid content of the pressure at one minute is a=(h-aL) / h; the colloid content of the pressure at five minutes is b=(h-bL) / h; the colloid content of the pressure at ten minutes is c=(h-cL) / h. (4) Discharge: Turn on the discharge and continue discharging until the mud in the test tank is completely drained. When the mud viscosity in step (3) is greater than 250 cps, turn on step (1) within 1 minute after discharge to prevent clumping.

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