Slurry shield machine slurry test system and test method

Abstract

The slurry testing system of the slurry shield tunneling machine comprises a storage tank, a slurry pumping assembly, a slurry testing assembly, a pipeline, a funnel and a first measuring flask which are arranged on one side of a support, a second measuring flask which is arranged on the other side of the support, the funnel is located above the first measuring flask, a first screen is arranged in the funnel, and a funnel opening and closing electric ball valve is arranged at the bottom of the funnel; a first measuring flask is supported on an electronic weighing instrument, a second measuring flask is flush with the first measuring flask, a laser tester is arranged on a support and is aligned with a set scale on a funnel, a capacitance proximity switch is arranged below the funnel, and a clamping ring is an open-close type clamping ring which is rotatably arranged on the support. The rotating plane is higher than the first measuring flask and the second measuring flask and lower than the capacitance proximity switch, a second screen is arranged in the second measuring flask, automatic sampling and automatic detection can be achieved, time and labor are saved, efficiency is high, accuracy and reproducibility are good, and shield construction can be better guided; the method for testing the slurry of the slurry shield tunneling machine is simple to operate and easy to implement.

Description

Technical Field

[0001] The invention relates to the technical field of shield tunneling mud treatment, and in particular to a mud-water shield machine mud testing system and a testing method. Background Art

[0002] With the development of the times, the construction of underground space tunnels has continued to grow, and the application of shield machines has become more and more extensive. Mud indicators are the key control points of slurry shield machines during the excavation process. Mud indicators mainly include three parameters: mud density, mud viscosity, and mud sand content. Traditional detection methods are mostly manual sampling + manual detection, which is time-consuming, labor-intensive and inefficient. There will be errors in manual work, and the gaps between multiple tests are large. The accuracy and reproducibility are poor. Only the most conservative set of data can be used to guide shield construction, and it is difficult to give full play to the efficiency of the shield. Summary of the invention

[0003] The purpose of the present invention is to overcome one or more disadvantages in the prior art and to provide a slurry testing system and a slurry testing method for a slurry shield machine.

[0004] In order to achieve the above-mentioned purpose, the product in the technical solution provided by the present invention is a slurry testing system for a slurry shield machine, comprising:

[0005] A storage tank, wherein a partition is provided inside the storage tank, and the partition separates the internal cavity of the storage tank into a water area and a mud area which are independent of each other;

[0006] A slurry pumping assembly, the slurry pumping assembly comprising a slurry extraction pipeline and a slurry pump, one end of the slurry extraction pipeline is connected to the slurry return pool of the slurry shield machine, and the other end extends to the top of the slurry area, and the slurry pump is used to pump the slurry in the slurry return pool into the slurry area through the slurry extraction pipeline;

[0007] A mud testing assembly; the mud testing assembly comprises a bracket, a funnel, a first volume bottle, a second volume bottle, an electronic weighing instrument, a laser tester, a capacitive proximity switch, a clamp ring, and a stirring barrel. The funnel and the first volume bottle are arranged on one side of the bracket, and the second volume bottle is arranged on the other side of the bracket. The funnel is located above the first volume bottle. A first screen is arranged in the funnel, and a funnel opening and closing electric ball valve is arranged at the bottom of the funnel. The first volume bottle is supported on the electronic weighing instrument, and the second volume bottle is flush with the first volume bottle. The laser tester is arranged on the bracket and aligned with the set scale on the funnel. The capacitive proximity switch is arranged below the funnel to detect the time taken for the mud of the volume corresponding to the set scale to drip from the funnel into the first volume bottle. The clamp ring is rotatably arranged on the bracket, and the rotation plane of the clamp ring is higher than the bottle mouths of the first volume bottle and the second volume bottle and lower than the capacitive proximity switch. A second screen is arranged in the clamp ring, and the clamp ring is an open and close type clamp ring. A rotatable stirring paddle is arranged in the stirring barrel.

[0008] The mud testing assembly also includes a pipeline, on which an electric ball valve is provided. The pipeline is used to transport the mud in the mud area to the funnel, the first volumetric bottle, and the stirring barrel, and is also used to transport the water in the water area to the first volumetric bottle, the second volumetric bottle, and the stirring barrel, and is used to transport the slurry in the stirring barrel to the first volumetric bottle.

[0009] Preferably, the bracket includes a base and a support rod disposed on the base and extending vertically upward, and the support rod is connected to a support ring frame for placing the funnel, the first measuring bottle, and the second measuring bottle.

[0010] Preferably, the funnel is lower than the storage tank, the mesh number of the first sieve is 16 meshes, the first sieve is higher than the set scale, the mesh number of the second sieve is 203 meshes, and when the clamping ring is opened, the second sieve can automatically fall from the clamping ring.

[0011] Preferably, the pipeline includes first to sixth pipelines, one end of the first pipeline is connected to the bottom of the mud area, and the other end extends to the top of the funnel, the first pipeline is used to transport the mud in the mud area to the funnel, one end of the second pipeline is connected to the bottom of the water area, and the other end extends to the top of the first volumetric bottle, the second pipeline is used to transport the water in the water area to the first volumetric bottle, one end of the third pipeline is connected to the first pipeline, and the other end of the third pipeline extends to the top of the mixing barrel, the third pipeline is used to transport the mud in the mud area to the mixing barrel, In the mixing barrel, one end of the fourth pipe is connected to the second pipe, and the other end of the fourth pipe extends to the top of the mixing barrel, and the fourth pipe is used to transport the water in the water zone to the mixing barrel, one end of the fifth pipe is connected to the bottom of the mixing barrel, and the other end extends to the top of the first volumetric bottle, and the fifth pipe is used to transport the mud stirred in the mixing barrel to the first volumetric bottle, one end of the sixth pipe is connected to the second pipe, and the other end of the sixth pipe extends to the top of the second volumetric bottle, and the sixth pipe is used to transport the water in the water zone to the second volumetric bottle.

[0012] Further preferably, the electric ball valve includes a first electric ball valve arranged on the first pipeline, a second electric ball valve arranged on the second pipeline, a third electric ball valve arranged on the third pipeline, a fourth electric ball valve arranged on the fourth pipeline, a fifth electric ball valve arranged on the fifth pipeline and a sixth electric ball valve arranged on the sixth pipeline, the first electric ball valve is located between the third pipeline and the funnel, and the side connection point of the fourth pipeline, the side connection point of the sixth pipeline and the second electric ball valve are arranged in sequence along the flow direction of water in the second pipeline.

[0013] Further preferably, the mixing barrel is located below the storage tank, and a lower liquid level probe and an upper liquid level probe are provided on the inner wall of the mixing barrel. When the liquid level in the mixing barrel is below the lower liquid level probe, the third electric ball valve and the fourth electric ball valve are opened, and the mud in the mud area and the water in the water area flow into the mixing barrel under the action of their own weight. When the liquid level in the mixing barrel is above the upper liquid level probe, the third electric ball valve and the fourth electric ball valve are closed.

[0014] Preferably, the slurry pumping assembly further comprises a liquid level gauge arranged on the inner wall of the mud area, and when the liquid level gauge detects that the mud level in the mud area reaches a set value, the mud pump is shut down.

[0015] Preferably, the slurry pumping assembly further comprises a slurry pumping on-off electric ball valve provided on the slurry pumping pipeline for controlling the on-off of the slurry pumping pipeline, and the slurry pumping on-off electric ball valve is interlocked with the mud pump.

[0016] Preferably, the slurry testing system of the slurry shield machine further comprises a control electrical box, and the control electrical box is electrically connected to the electronic weighing instrument, the laser tester and the capacitive proximity switch.

[0017] To achieve the above object, the method in the technical solution provided by the present invention is a slurry testing method for a slurry shield machine, which is tested by using any one of the above-mentioned slurry testing systems for a slurry shield machine, and the testing method comprises the following steps:

[0018] a. The mud in the mud area is transported to the funnel, filtered by the first screen, and falls into the funnel. When the mud liquid level in the funnel reaches the set scale, the transportation is stopped;

[0019] b. Open the funnel to open and close the electromagnetic ball valve, so that the mud in the funnel drips into the first volumetric bottle, and detects the dripping time through the capacitive proximity switch to calculate the mud viscosity;

[0020] c. After all the mud in the funnel is dripped into the first volumetric bottle, the weight of the first volumetric bottle is weighed by an electronic weighing instrument, and then the weight of the first volumetric bottle is subtracted to obtain the weight of the mud corresponding to the set scale. Then the mud volume is obtained by the scale on the first volumetric bottle to calculate the mud specific gravity;

[0021] d. Rotate the clamp ring to move the second screen to the top of the first bottle;

[0022] e. The mud in the mud area and the water in the water area are transported to the mixing barrel for stirring according to the set ratio. After the stirring is completed, the mud of the set volume in the mixing barrel is transported to the first volume bottle, filtered through the second screen and falls into the first volume bottle;

[0023] f. The water in the water zone is transferred to the first volumetric bottle, and the particles on the second screen are rinsed. After rinsing, the clamp ring is rotated to move the second screen to the top of the bottle mouth of the second volumetric bottle;

[0024] g. Pour a set volume of water into the second volumetric flask, loosen the clamp ring, and let the second sieve and the particles fall into the second volumetric flask. The sand content of the mud can be calculated by subtracting the volume of the second sieve from the scale change of the second volumetric flask;

[0025] h. Rinse the funnel and use the first volumetric bottle to receive the rinsed material. After the rinsing is completed, disassemble the first and second volumetric bottles for cleaning and reset, ready for the next test.

[0026] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0027] The mud test system for a slurry shield provided by the present invention realizes an integrated design of mud index testing, integrates the testing of mud specific gravity, mud viscosity and mud sand content into one system, reduces manual operation, reduces human errors, improves the accuracy and reproducibility of the test, reduces the space occupied by the equipment, and improves the convenience of operation. The mud test method for a slurry shield provided by the present invention is simple to operate and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of a preferred embodiment of the present invention.

[0029] Figure 2 yes Figure 1 Schematic diagram of the structure of the slurry pumping assembly.

[0030] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle mud test assembly, at this time, the clamp ring is located above the first volumetric bottle.

[0031] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle mud test assembly, at this time, the clamp ring is located above the second volumetric bottle.

[0032] Among them: 1. Slurry return pool; 10. Storage tank; 11. Partition; 12. Water area; 13. Mud area; 21. Slurry extraction pipeline; 22. Mud pump; 23. Liquid level meter; 24. Slurry extraction opening and closing electric ball valve; 31. Bracket; 311. Base; 312. Support rod; 313. Support ring frame; 32. Funnel; 321. First screen; 322. Funnel opening and closing electric ball valve; 33. First volume bottle; 34. Second volume bottle; 35. Electronic weighing instrument; 36. Laser tester; 37. Capacitance approximation Switch; 38. Retaining ring; 381. Second screen; 39. Mixing barrel; 391. Mixing paddle; 392. Lower liquid level probe; 393. Upper liquid level probe; 41. First pipeline; 42. Second pipeline; 43. Third pipeline; 44. Fourth pipeline; 45. Fifth pipeline; 46. Sixth pipeline; 51. First electric ball valve; 52. Second electric ball valve; 53. Third electric ball valve; 54. Fourth electric ball valve; 55. Fifth electric ball valve; 56. Sixth electric ball valve; 60. Control electrical box. DETAILED DESCRIPTION

[0033] like Figures 1 to 4As shown, the mud test system of the slurry shield machine provided by the present invention comprises: a storage tank 10, a slurry pumping assembly, a slurry testing assembly, and a pipeline, wherein a partition 11 is provided in the storage tank 10, and the partition 11 divides the internal cavity of the storage tank 10 into a water area 12 and a mud area 13 which are independent of each other, and the volumes of the water area 12 and the mud area 13 are equal; the slurry pumping assembly comprises a slurry extraction pipeline 21, a mud pump 22, a level meter 23, and a slurry extraction opening and closing electric ball valve 24, one end of the slurry extraction pipeline 21 is connected to the slurry return pool 1 of the slurry shield machine, and the other end extends to the top of the mud area 13, the mud pump 22 is used to pump the mud in the slurry return pool 1 into the mud area 13 through the slurry extraction pipeline 21, and the level meter 23 is set On the inner wall of the mud area 13, when the level meter 23 detects that the mud level in the mud area 13 reaches the set value, the mud pump 22 is closed, and the slurry suction opening and closing electric ball valve 24 is set on the slurry suction pipeline 21 to control the on and off of the slurry suction pipeline 21. The slurry suction opening and closing electric ball valve 24 is interlocked with the mud pump 22. The interlock means that when the mud pump 22 is turned on, the slurry suction opening and closing electric ball valve 24 is opened, and when the mud pump 22 is turned off, the slurry suction opening and closing electric ball valve 24 is closed; the mud testing assembly includes a bracket 31, a funnel 32, a first measuring bottle 33, a second measuring bottle 34, an electronic weighing instrument 35, a laser tester 36, a capacitive proximity switch 37, a clamping ring 38, and a stirring barrel 39. The bracket 31 includes a base 311 and a base 311 arranged at the bottom A support rod 312 is provided on the seat 311 and extends vertically upward, and a support ring frame 313 for placing a funnel 32, a first measuring bottle 33, and a second measuring bottle 34 is connected to the support rod 312. The funnel 32 and the first measuring bottle 33 are arranged on the right side of the bracket 31, and the second measuring bottle 34 is arranged on the left side of the bracket 31. The funnel 32 is located above the first measuring bottle 33 and lower than the storage tank 10. A first sieve 321 is provided in the funnel 32, and the mesh number of the first sieve 321 is 16 meshes. The first sieve 321 is higher than the set scale on the funnel 32. A funnel opening and closing electric ball valve 322 is provided at the bottom of the funnel 32. The first measuring bottle 33 is supported on the electronic weighing instrument 35, and the second measuring bottle 34 is flush with the first measuring bottle 33. The optical tester 36 is arranged on the bracket 31 and is aligned with the set scale on the funnel 32. The capacitive proximity switch 37 is arranged below the funnel 32 to detect the time taken for the slurry corresponding to the set scale on the funnel 32 to drip from the funnel 32 into the first volume bottle 33. The clamp ring 38 is rotatably arranged on the bracket 31. The rotation plane of the clamp ring 38 is higher than the bottle mouths of the first volume bottle 33 and the second volume bottle 34 and lower than the capacitive proximity switch 37. A second screen 381 is arranged inside the clamp ring 38. The mesh number of the second screen 381 is 203. The clamp ring 38 is an open and closed clamp ring. When the clamp ring 38 is opened, the second screen 381 can automatically fall from the clamp ring 38. A rotatable stirring paddle 391 is arranged inside the mixing barrel 39.An electric ball valve is provided on the pipeline, and the pipeline is used to transport the mud in the mud area 13 to the funnel 32, the first measuring bottle 33, and the stirring barrel 39, and is also used to transport the water in the water area 12 to the first measuring bottle 33, the second measuring bottle 34, and the stirring barrel 39, and is used to transport the slurry in the stirring barrel 39 to the first measuring bottle 33. ;

[0034] The advantage of this setting is that it realizes the integrated design of mud index testing, integrating the tests of mud density, mud viscosity and mud sand content into one system, reducing manual operation, reducing human errors, improving test accuracy and reproducibility, reducing the space occupied by equipment, and improving operational convenience.

[0035] Furthermore, the pipeline includes first to sixth pipelines, one end of the first pipeline 41 is connected to the bottom of the mud area 13, and the other end extends to the top of the funnel 32. The first pipeline 41 is used to transport the mud in the mud area 13 to the funnel 32. One end of the second pipeline 42 is connected to the bottom of the water area 12, and the other end extends to the top of the first measuring bottle 33. The second pipeline 42 is used to transport the water in the water area 12 to the first measuring bottle 33. One end of the third pipeline 43 is connected to the first pipeline 41, and the other end extends to the top of the mixing barrel 39. The third pipeline 43 is used to transport the mud in the mud area 13 to the mixing barrel 39. One end of the fourth pipeline 44 is connected to the second pipeline 42, and the other end extends to the top of the mixing barrel 39. The fourth pipeline 44 is used to transport the water in the water area 12 to the mixing barrel 39. One end of the fifth pipeline 45 is connected to the bottom of the mixing barrel 39, and the other end extends to the top of the first measuring bottle 33. , the fifth pipe 45 is used to transport the stirred mud in the mixing barrel 39 to the first measuring bottle 33, one end of the sixth pipe 46 is connected to the second pipe 42, and the other end extends to the top of the second measuring bottle 34, and the sixth pipe 46 is used to transport the water in the water area 12 to the second measuring bottle 34; the electric ball valves on the pipes include a first electric ball valve 51 arranged on the first pipe 41, a second electric ball valve 52 arranged on the second pipe 42, a third electric ball valve 53 arranged on the third pipe 43, a fourth electric ball valve 54 arranged on the fourth pipe 44, a fifth electric ball valve 55 arranged on the fifth pipe 45 and a sixth electric ball valve 56 arranged on the sixth pipe 46, the first electric ball valve 51 is located between the third pipe 43 and the funnel 32, and the side connection point of the fourth pipe 44, the side connection point of the sixth pipe 46, and the second electric ball valve 52 are arranged in sequence along the flow direction of water in the second pipe 42.

[0036] In this embodiment, the mixing barrel 39 is located below the storage tank 10, and the inner wall of the mixing barrel 39 is provided with a lower liquid level probe 392 and an upper liquid level probe 393. When the liquid level in the mixing barrel 39 is below the lower liquid level probe 392, the third electric ball valve 43 and the fourth electric ball valve 44 are opened, and the mud in the mud area 13 and the water in the water area 12 flow into the mixing barrel 39 under the action of their own weight. When the liquid level in the mixing barrel 39 is above the upper liquid level probe 393, the third electric ball valve 43 and the fourth electric ball valve 44 are closed. The capacity corresponding to the lower liquid level probe 392 is 100 ml, and the capacity corresponding to the upper liquid level probe 393 is 350 ml.

[0037] The mud testing system of the slurry shield machine also includes a control electrical box 60, and the PLC in the control electrical box 60 is electrically connected to the mud pump 22, the liquid level meter 23, the slurry extraction opening and closing electric ball valve 24, the funnel opening and closing electric ball valve 322, the electronic weighing meter 35, the laser tester 36, the capacitive proximity switch 37, the stirring motor of the stirring barrel 39, the first electric ball valve 51, the second electric ball valve 52, the third electric ball valve 53, the fourth electric ball valve 54, the fifth electric ball valve 55, and the sixth electric ball valve 56 to achieve automatic control.

[0038] In this embodiment, the first pipe 41 and the fifth pipe 45 for conveying mud are wear-resistant hoses to improve durability.

[0039] In this embodiment, the capacity of the storage tank 10 is 10L, the capacity of the water area 12 and the mud area 13 is 5L, the size specifications of the pipeline 40 are all DN10mm, the volume of the funnel 32 below the first screen 321 is 700ml, the capacity corresponding to the set scale on the funnel 32 is 500ml, the volume of the first volumetric bottle 33 and the second volumetric bottle 34 is 1L, and the stirring paddle 391 of the stirring barrel 39 is provided with a small motor to drive the stirring paddle 391 to rotate.

[0040] The present invention also provides a slurry testing method for a slurry shield machine, which is tested by using the slurry testing system for the slurry shield machine. The testing method comprises the following steps:

[0041] a. The mud in the mud area is transported to the funnel, filtered by the first screen, and falls into the funnel. When the mud liquid level in the funnel reaches the set scale, the transportation is stopped;

[0042] b. Open the funnel to open and close the electromagnetic ball valve, so that the mud in the funnel drips into the first volumetric bottle, and detects the dripping time through the capacitive proximity switch to calculate the mud viscosity;

[0043] c. After all the mud in the funnel is dripped into the first volumetric bottle, the weight of the first volumetric bottle is weighed by an electronic weighing instrument, and then the weight of the first volumetric bottle is subtracted to obtain the weight of the mud corresponding to the set scale. Then the mud volume is obtained by the scale on the first volumetric bottle to calculate the mud specific gravity;

[0044] d. Rotate the clamp ring to move the second screen to the top of the first bottle;

[0045] e. The mud in the mud area and the water in the water area are transported to the mixing barrel for stirring according to the set ratio. After the stirring is completed, the mud of the set volume in the mixing barrel is transported to the first volume bottle, filtered through the second screen and falls into the first volume bottle;

[0046] f. The water in the water zone is transferred to the first volumetric bottle, and the particles on the second screen are rinsed. After rinsing, the clamp ring is rotated to move the second screen to the top of the bottle mouth of the second volumetric bottle;

[0047] g. Pour a set volume of water into the second volumetric flask, loosen the clamp ring, and let the second sieve and the particles fall into the second volumetric flask. The sand content of the mud can be calculated by subtracting the volume of the second sieve from the scale change of the second volumetric flask;

[0048] h. Rinse the funnel and use the first volumetric bottle to receive the rinsed material. After the rinsing is completed, disassemble the first and second volumetric bottles for cleaning and reset, ready for the next test.

[0049] The mud shield machine mud testing method provided by the invention is simple to operate and easy to implement.

[0050] In actual operation, it can be divided into the following three steps:

[0051] Step 1: When the mud in the storage tank reaches 700ml, the first electric ball valve opens, and the mud enters the funnel under the action of gravity. When it reaches 500ml, the funnel opening and closing electric ball valve opens, and the mud flows into the first volumetric bottle from the bottom. During this process, the proximity switch starts to work and measures the dripping time of 500ml of mud.

[0052] Step 2: After the mud flows into the first volume bottle through step 1, the electronic weighing instrument obtains the weight (note that the value of the electronic weighing instrument is zero before the mud flows in), and the mud specific gravity is calculated by the known data and the calculation formula (Formula 1: Mud density = mud weight (g) / mud volume (cm 3 )=ρ=m / v, Formula 2 (SG mud specific gravity = ρmud / ρwater) is calculated according to the actual weight and volume of the electronic weighing instrument, and the accuracy of the data is maintained during the process.

[0053] Step 3: After the mud passes through step 2, rotate the clamp ring and put it on the top of the first volumetric bottle. The slurry in the mixing barrel starts to stir while measuring the viscosity. When the viscosity and specific gravity are measured, open the fifth electric ball valve, and the mud flows into the first volumetric bottle. The second screen in the clamp ring filters the sand inside. After filtering, open the second electric ball valve to rinse it. After rinsing, rotate the clamp ring to the top of the second volumetric bottle, open the clamp ring, so that the second screen falls into the second volumetric bottle, then close the fifth electric ball valve and open the sixth electric ball valve, add a certain amount of clean water to the second volumetric bottle, precipitate, and then read the data to measure the percentage of the mud volume occupied by solid phase particles that cannot pass through 203 mesh or have a particle size greater than 0.074mm in the mud, keep the volumetric bottle still on the test bench, and collect data after the sand is precipitated. It should be noted that the measurement requires the removal of the volume occupied by the second screen in advance. At the same time, a certain amount of clean water can be added to the second volumetric bottle before opening the clamp ring to prevent the second screen from falling and damaging the second volumetric bottle.

[0054] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A slurry testing system for a slurry shield machine, comprising: A storage tank, wherein a partition is provided inside the storage tank, and the partition separates the internal cavity of the storage tank into a water area and a mud area which are independent of each other; A slurry pumping assembly, the slurry pumping assembly comprising a slurry extraction pipeline and a slurry pump, one end of the slurry extraction pipeline is connected to the slurry return pool of the slurry shield machine, and the other end extends to the top of the slurry area, and the slurry pump is used to pump the slurry in the slurry return pool into the slurry area through the slurry extraction pipeline; Mud test kit; Features: The mud testing assembly includes a bracket, a funnel, a first volume bottle, a second volume bottle, an electronic weighing instrument, a laser tester, a capacitive proximity switch, a clamp ring, and a stirring barrel. The funnel and the first volume bottle are arranged on one side of the bracket, and the second volume bottle is arranged on the other side of the bracket. The funnel is located above the first volume bottle. A first screen is arranged in the funnel. A funnel opening and closing electric ball valve is arranged at the bottom of the funnel. The first volume bottle is supported on the electronic weighing instrument, and the second volume bottle is flush with the first volume bottle. The laser tester is arranged on the bracket and aligned with the set scale on the funnel. The capacitive proximity switch is arranged below the funnel to detect the time taken for the mud of the corresponding capacity of the set scale to drip from the funnel into the first volume bottle. The clamp ring is rotatably arranged on the bracket, and the rotation plane of the clamp ring is higher than the bottle mouths of the first volume bottle and the second volume bottle and lower than the capacitive proximity switch. A second screen is arranged in the clamp ring. The clamp ring is an open and close type clamp ring. A rotatable stirring paddle is arranged in the stirring barrel. The mud testing assembly also includes a pipeline, on which an electric ball valve is provided. The pipeline is used to transport the mud in the mud area to the funnel, the first volumetric bottle, and the stirring barrel, and is also used to transport the water in the water area to the first volumetric bottle, the second volumetric bottle, and the stirring barrel, and is used to transport the slurry in the stirring barrel to the first volumetric bottle.

2. The slurry testing system for a slurry shield machine according to claim 1, characterized in that: The bracket includes a base and a support rod disposed on the base and extending vertically upwards, and the support rod is connected to a support ring frame for placing the funnel, the first measuring bottle, and the second measuring bottle.

3. The slurry testing system for a slurry shield machine according to claim 1, characterized in that: The funnel is lower than the storage tank, the mesh number of the first screen is 16 meshes, the first screen is higher than the set scale, the mesh number of the second screen is 203 meshes, and when the clamping ring is opened, the second screen can automatically fall from the clamping ring.

4. The slurry testing system for a slurry shield machine according to claim 1, characterized in that: The pipeline includes first to sixth pipelines, one end of the first pipeline is connected to the bottom of the mud area, and the other end extends to the top of the funnel. The first pipeline is used to transport the mud in the mud area to the funnel. One end of the second pipeline is connected to the bottom of the water area, and the other end extends to the top of the first volumetric bottle. The second pipeline is used to transport the water in the water area to the first volumetric bottle. One end of the third pipeline is connected to the first pipeline, and the other end of the third pipeline extends to the top of the stirring barrel. The third pipeline is used to transport the mud in the mud area to the stirring barrel. The mixing barrel has one end, the fourth pipe is connected to the second pipe, and the other end of the fourth pipe extends to the top of the mixing barrel, and the fourth pipe is used to transport the water in the water zone to the mixing barrel. The fifth pipe is connected to the bottom of the mixing barrel, and the other end extends to the top of the first volumetric bottle. The fifth pipe is used to transport the mud stirred in the mixing barrel to the first volumetric bottle. The sixth pipe is connected to the second pipe at one end, and the other end of the sixth pipe extends to the top of the second volumetric bottle. The sixth pipe is used to transport the water in the water zone to the second volumetric bottle.

5. The slurry testing system for a slurry shield machine according to claim 4, characterized in that: The electric ball valve includes a first electric ball valve arranged on the first pipeline, a second electric ball valve arranged on the second pipeline, a third electric ball valve arranged on the third pipeline, a fourth electric ball valve arranged on the fourth pipeline, a fifth electric ball valve arranged on the fifth pipeline and a sixth electric ball valve arranged on the sixth pipeline. The first electric ball valve is located between the third pipeline and the funnel, and the side connection point of the fourth pipeline, the side connection point of the sixth pipeline and the second electric ball valve are arranged in sequence along the flow direction of water in the second pipeline.

6. The slurry testing system for a slurry shield machine according to claim 5, characterized in that: The mixing barrel is located below the storage tank, and a lower liquid level probe and an upper liquid level probe are provided on the inner wall of the mixing barrel. When the liquid level in the mixing barrel is below the lower liquid level probe, the third electric ball valve and the fourth electric ball valve are opened, and the mud in the mud area and the water in the water area flow into the mixing barrel under the action of their own weight. When the liquid level in the mixing barrel is above the upper liquid level probe, the third electric ball valve and the fourth electric ball valve are closed.

7. The slurry testing system for a slurry shield machine according to claim 1, characterized in that: The slurry pumping assembly further comprises a liquid level gauge arranged on the inner wall of the mud area. When the liquid level gauge detects that the mud level in the mud area reaches a set value, the mud pump is turned off.

8. The slurry testing system for a slurry shield machine according to claim 1, characterized in that: The slurry pumping assembly also includes a slurry pumping on-off electric ball valve arranged on the slurry pumping pipeline for controlling the on-off of the slurry pumping pipeline, and the slurry pumping on-off electric ball valve is interlocked with the mud pump.

9. The slurry testing system for a slurry shield machine according to claim 1, characterized in that: The mud shield machine mud testing system also includes a control electric box, and the control electric box is electrically connected to the electronic weighing instrument, the laser tester, and the capacitive proximity switch.

10. A method for testing slurry of a slurry shield machine, using the slurry testing system of any one of claims 1 to 9, characterized in that: The following steps are involved: a. The mud in the mud area is transported to the funnel, filtered by the first screen, and falls into the funnel. When the mud liquid level in the funnel reaches the set scale, the transportation is stopped; b. Open the funnel to open and close the electromagnetic ball valve, so that the mud in the funnel drips into the first volumetric bottle, and detects the dripping time through the capacitive proximity switch to calculate the mud viscosity; c. After all the mud in the funnel is dripped into the first volumetric bottle, the weight of the first volumetric bottle is weighed by an electronic weighing instrument, and then the weight of the first volumetric bottle is subtracted to obtain the weight of the mud corresponding to the set scale. Then the mud volume is obtained by the scale on the first volumetric bottle to calculate the mud specific gravity; d. Rotate the clamp ring to move the second screen to the top of the first bottle; e. The mud in the mud area and the water in the water area are transported to the mixing barrel for stirring according to the set ratio. After the stirring is completed, the mud of the set volume in the mixing barrel is transported to the first volume bottle, filtered through the second screen and falls into the first volume bottle; f. The water in the water zone is transferred to the first volumetric bottle, and the particles on the second screen are rinsed. After rinsing, the clamp ring is rotated to move the second screen to the top of the bottle mouth of the second volumetric bottle; g. Pour a set volume of water into the second volumetric flask, loosen the clamp ring, and let the second sieve and the particles fall into the second volumetric flask. The sand content of the mud can be calculated by subtracting the volume of the second sieve from the scale change of the second volumetric flask; h. Rinse the funnel and use the first volumetric bottle to receive the rinsed material. After the rinsing is completed, disassemble the first and second volumetric bottles for cleaning and reset, ready for the next test.

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