Slurry discharging system and slurry balance shield machine

Abstract

The invention provides a slurry discharging system and a slurry balance shield tunneling machine, and the slurry discharging system comprises a slurry inlet channel, a slurry outlet channel, a slurry outlet channel and a slurry discharging channel, the liquid inlet end of the slurry inlet channel is filled with first slurry, and the liquid outlet end of the slurry inlet channel is connected with the liquid inlet end of a slurry bin and the liquid inlet end of an air cushion bin in the shield tunneling machine; the liquid inlet end of the slurry discharging channel is connected with the liquid outlet end of the muddy water bin and the liquid outlet end of the air cushion bin, and the liquid outlet end of the slurry discharging channel is used for discharging the second slurry; and the control module is used for controlling the conduction of the slurry inlet passage, and controlling the conduction of a passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the air cushion bin, and / or the conduction of a passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the muddy water bin. According to the slurry discharging system and the slurry balance shield tunneling machine, different slurry discharging modes can be achieved according to different slurry states, so that the slurry discharging system and the slurry balance shield tunneling machine adapt to complex and changeable geological conditions, and diversified construction requirements are met.

Description

Technical Field

[0001] The present disclosure relates to the technical field of shield slurry discharge, and particularly to a slurry discharge system and a slurry balance shield machine. Background Art

[0002] In modern tunnel excavation projects, slurry balance shield machines have been widely used as efficient and safe construction equipment. However, there are certain limitations in the design and working mode of the existing slurry discharge pipelines of slurry balance shield machines. Traditional shield machines often only have a single type of slurry discharge pipeline, and the working mode is relatively fixed. This leads to a greater impact on the adaptability and working efficiency of the shield machine when facing complex and changeable geological conditions and diverse construction requirements. For example, in certain geological conditions (such as high-permeability formations, high-permeability and low-permeability mixed formations, etc.), a single slurry discharge pipeline may not be able to discharge muck in a timely and effective manner, easily causing problems such as pipe blockage and pressure imbalance, thereby affecting the construction progress and project quality, and even potentially triggering safety accidents. Summary of the Invention

[0003] The present disclosure aims to solve at least one of the technical problems in the related art to some extent.

[0004] To this end, the purpose of the present disclosure is to provide a slurry discharge system and a slurry balance shield machine.

[0005] To achieve the above object, the first aspect of the present disclosure provides a slurry discharge system, including: a slurry inlet passage, the liquid inlet end of the slurry inlet passage is introduced into a first slurry, and the liquid outlet end of the slurry inlet passage is respectively connected to the liquid inlet end of the slurry chamber and the liquid inlet end of the air cushion chamber in the shield system; a slurry discharge passage, the liquid inlet end of the slurry discharge passage is respectively connected to the liquid outlet end of the slurry chamber and the liquid outlet end of the air cushion chamber, and the liquid outlet end of the slurry discharge passage discharges a second slurry; a control module, the control module is used to control the conduction of the slurry inlet passage according to the first flow rate and first density of the first slurry and the second flow rate and second density of the second slurry, and control the conduction of the passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the air cushion chamber, and / or the conduction of the passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the slurry chamber.

[0006] Optionally, when the ratio of the product of the second flow rate and the second density to the product of the first flow rate and the first density is less than a first threshold value, the passage between the liquid inlet end of the slurry drainage passage and the liquid outlet end of the air cushion bin is controlled to be conductive; when the ratio of the product of the second flow rate and the second density to the product of the first flow rate and the first density is greater than a second threshold value, the passage between the liquid inlet end of the slurry drainage passage and the liquid outlet end of the mud and water bin is controlled to be conductive; when the ratio of the product of the second flow rate and the second density to the product of the first flow rate and the first density is not less than the first threshold value and not greater than the second threshold value, the passage between the liquid inlet end of the slurry drainage passage and the liquid outlet end of the air cushion bin, as well as the passage between the liquid inlet end of the slurry drainage passage and the liquid outlet end of the mud and water bin are controlled to be conductive; wherein, the first threshold value is less than the second threshold value.

[0007] Optionally, the control module is used to control the passageway between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the air cushion chamber when the second flow rate is not greater than the first flow rate, and the second density is greater than the first density and less than the blockage density threshold; when the second flow rate is greater than the sum of the first flow rate and the amount of soil propelled by the shield system, and the second density is greater than the theoretical density of the second slurry, control the passageway between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the mud and water chamber to be connected; wherein the theoretical density of the second slurry is ρ out is: out =((Q in ×ρ in )+(V×ρ s )) / (Q in +V), the Q in is the first flow rate, ρ in is the first density, V is the amount of soil pushed by the shield system, ρ s is the density of soil.

[0008] Optionally, the control module is used to control the conduction of the passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the air cushion tank when the second density is greater than the product of the first density and the first multiple, and the second flow rate is less than the product of the first flow rate and the second multiple; when the second density is not greater than the product of the first density and the first multiple, and the second flow rate is not less than the product of the first flow rate and the second multiple, control the conduction of the passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the mud and water tank; wherein, the first ratio is: (1+α), and α is the allowable density increase ratio; the second ratio is: (1-β), and β is the allowable flow reduction ratio.

[0009] Optionally, the control module is also used to control the conduction of the slurry inlet passage and the conduction of the passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the mud and water tank according to the first flow rate and the first density and the second flow rate and the second density, and to control the liquid level of the mud and water tank to be in a full tank state, or to control the liquid level of the mud and water tank to be in a half tank state.

[0010] Optionally, the slurry discharge system also includes: a first bypass passage, the liquid inlet end of the first bypass passage is connected to the liquid outlet end of the slurry inlet passage, and the liquid outlet end of the first bypass passage is connected to the liquid inlet end of the slurry discharge passage; wherein, the control module is also used to control the conduction of the first bypass passage when the first pressure of the mud and water tank exceeds a first pressure threshold, and / or the second pressure of the air cushion tank exceeds a second pressure threshold, and to adjust the opening of the first bypass passage according to the first pressure and the second pressure.

[0011] Optionally, the slurry discharge system also includes: a backwash passage, the liquid inlet end of the backwash passage is respectively connected to the liquid inlet end of the mud and water tank and the liquid inlet end of the air cushion tank, and the liquid outlet end of the backwash passage is connected to the liquid inlet end of the slurry discharge passage; wherein, the control module is also used to control the conduction of the first bypass passage and the backwash passage according to the first pressure and the first liquid level of the mud and water tank, the second pressure and the second liquid level of the air cushion tank, and the second flow rate and the second density, so that the first slurry is transported at a first reverse pressure along the direction from the liquid outlet end to the liquid inlet end of the mud and water tank and the direction from the liquid outlet end to the liquid inlet end of the air cushion tank.

[0012] Optionally, the slurry discharge system also includes: a second bypass passage, the liquid inlet end of the second bypass passage is connected to the liquid outlet end of the slurry inlet passage, and the liquid outlet end of the second bypass passage is respectively connected to the liquid outlet end of the mud and water tank and the liquid outlet end of the air cushion tank; wherein, the control module is also used to control the conduction of the second bypass passage and the backwash passage according to the first pressure and first liquid level of the mud and water tank, the second pressure and second liquid level of the air cushion tank, and the second flow rate and the second density, so that the first slurry is transported at a second reverse pressure along the direction from the liquid outlet end to the liquid inlet end of the mud and water tank and the direction from the liquid outlet end to the liquid inlet end of the air cushion tank; the second reverse pressure is greater than the first reverse pressure.

[0013] Optionally, the control module is also used to control the first opening of the passage between the liquid outlet end of the slurry inlet passage and the liquid inlet end of the mud and water bin and the second opening of the passage between the liquid outlet end of the slurry inlet passage and the liquid inlet end of the air cushion bin according to a preset ratio, and, when the density of the mud and water bin is greater than the density of the air cushion bin, increase the first opening; when the density of the mud and water bin is less than the density of the air cushion bin, increase the second opening.

[0014] The second aspect of the present disclosure provides a slurry balance shield machine, including: a slurry discharge system as provided in the first aspect of the present disclosure.

[0015] The technical solutions provided by the present disclosure may include the following beneficial effects:

[0016] Through the cooperation of the slurry inlet passage, the slurry discharge passage and the control module, different slurry discharge modes can be realized according to different slurry states, so as to adapt to complex and changeable geological conditions, meet diverse construction requirements, and thus effectively improve the construction quality and working efficiency of the shield system.

[0017] The additional aspects and advantages of the present disclosure will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present disclosure will become obvious and easy to understand from the following description of the embodiments in conjunction with the drawings, in which:

[0019] Figure 1 is a schematic structural diagram of the slurry discharge system proposed in related embodiments;

[0020] As shown in the figure: 1. Slurry inlet passage, 11. First slurry inlet branch pipe, 12. Second slurry inlet branch pipe, 13. Third valve body, 14. Fourth valve body, 15. Third flowmeter, 16. Fourth flowmeter, 17. Slurry inlet main pipe, 18. Slurry inlet pump, 19. Fifth valve body;

[0021] 2. Slurry discharge passage, 21. First slurry discharge branch pipe, 22. Second slurry discharge branch pipe, 23. First valve body, 24. Second valve body, 25. First flowmeter, 26. Second flowmeter, 27. Slurry discharge main pipe, 28. Sixth valve body, 29. Slurry discharge pump;

[0022] 3. First bypass passage, 31. First bypass pipeline, 32. Seventh valve body;

[0023] 4. Backwashing passage, 41. Backwashing pipeline, 42. Eighth valve body;

[0024] 5. Second bypass passage, 51. Second bypass pipeline, 52. Ninth valve body, 53. Booster pump;

[0025] 6. Monitoring module, 61. First densitometer, 62. First pressure sensor, 63. First liquid level sensor, 64. Second densitometer, 65. Second pressure sensor, 66. Second liquid level sensor;

[0026] 100. Slurry sump, 200. Air cushion sump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Embodiments of the present disclosure will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present disclosure and should not be construed as a limitation of the present disclosure. On the contrary, the embodiments of the present disclosure include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0028] As Figure 1 shown, an embodiment of the present disclosure provides a slurry discharging system, including: a slurry inlet passage 1, a slurry discharging passage 2, and a control module. The liquid inlet end of the slurry inlet passage 1 is introduced with a first slurry, and the liquid outlet end of the slurry inlet passage 1 is respectively connected to the liquid inlet ends of a slurry chamber 100 and an air cushion chamber 200 in a shield system. The liquid inlet end of the slurry discharging passage 2 is respectively connected to the liquid outlet ends of the slurry chamber 100 and the air cushion chamber 200, and the liquid outlet end of the slurry discharging passage 2 discharges a second slurry. The control module is configured to control the slurry inlet passage 1 to be conducted according to the first flow rate and the first density of the first slurry, and the second flow rate and the second density of the second slurry, and to control the passage between the liquid inlet end of the slurry discharging passage 2 and the liquid outlet end of the air cushion chamber 200 to be conducted, and / or the passage between the liquid inlet end of the slurry discharging passage 2 and the liquid outlet end of the slurry chamber 100 to be conducted.

[0029] It can be understood that since the liquid inlet end of the slurry inlet passage 1 is introduced with the first slurry, and the liquid outlet end of the slurry inlet passage 1 is respectively connected to the liquid inlet ends of the slurry chamber 100 and the air cushion chamber 200 in the shield system, the first slurry can enter the slurry chamber 100 and the air cushion chamber 200 of the shield system through the slurry inlet passage 1. Moreover, since the liquid inlet end of the slurry discharging passage 2 is respectively connected to the liquid outlet ends of the slurry chamber 100 and the air cushion chamber 200, and the liquid outlet end of the slurry discharging passage 2 discharges the second slurry, the second slurry in the slurry chamber 100 and the air cushion chamber 200 can be discharged through the slurry discharging passage 2.

[0030] When the control module controls the slurry inlet passage 1 to be conducted according to the first flow rate and the first density of the first slurry, and the second flow rate and the second density of the second slurry, and controls the passage between the liquid inlet end of the slurry discharging passage 2 and the liquid outlet end of the air cushion chamber 200 to be conducted, the first slurry can be conveyed to the slurry chamber 100 and the air cushion chamber 200, and the second slurry formed by mixing the first slurry and muck can be discharged from the air cushion chamber 200, thereby realizing an intermittent control and intermittent discharging slurry discharging mode, and further adapting to the shield working conditions of high-permeability strata.

[0031] When the control module controls the slurry inlet passage 1 to be turned on according to the first flow rate and the first density of the first slurry and the second flow rate and the second density of the second slurry, and controls the passage between the liquid inlet end of the slurry discharge passage 2 and the liquid outlet end of the slurry sump 100 to be turned on, it can transport the first slurry to the slurry sump 100 and the air cushion chamber 200, and discharge the second slurry formed by mixing the first slurry and the muck from the slurry sump 100, so as to realize the slurry discharge mode of intermediate control direct discharge, and further adapt to the shield construction conditions of low-permeability strata.

[0032] When the control module controls the slurry inlet passage 1 to be turned on according to the first flow rate and the first density of the first slurry and the second flow rate and the second density of the second slurry, and controls the passage between the liquid inlet end of the slurry discharge passage 2 and the liquid outlet end of the air cushion chamber 200 to be turned on, and the passage between the liquid inlet end of the slurry discharge passage 2 and the liquid outlet end of the slurry sump 100 to be turned on, it can transport the first slurry to the slurry sump 100 and the air cushion chamber 200, and discharge the second slurry formed by mixing the first slurry and the muck from the air cushion chamber 200 and the slurry sump 100, so as to realize the slurry discharge mode of intermediate control mixing, and further adapt to the shield construction conditions of low-permeability and high-permeability mixed strata.

[0033] Thus, through the cooperation of the slurry inlet passage 1, the slurry discharge passage 2 and the control module, different slurry discharge modes can be realized according to different slurry states, so as to adapt to complex and changeable geological conditions, meet diverse construction requirements, and further effectively improve the construction quality and working efficiency of the shield system.

[0034] It should be noted that slurry shield machines are widely used in various tunnel constructions. They use the prepared muddy water suspension (mud) as the support material, and form an impermeable mud film through mud penetration, converting the mud pressure into an effective support force to balance the water and soil pressure on the excavation face.

[0035] When the shield machine crosses a long-distance stratum with high water pressure and high permeability, the mud is prone to a large amount of filtration loss, resulting in the instability of the excavation face and then a collapse accident. High-permeability strata usually refer to strata with extremely strong water permeability and fast groundwater flow rate (such as cobblestone strata, gravel strata, strongly weathered fissure rock strata, karst cave-developed strata, etc.). Their characteristics are large porosity, good connectivity between particles, and allowing water and fluids to penetrate quickly. Such strata pose significant challenges to the stability, sealing and safety of shield construction.

[0036] Characteristics of high-permeability strata: Violent groundwater activity: High pore water pressure in the strata, prone to water inrush or gushing; Coarse particles and poor cementation: There is no cohesion between particles in gravel strata or cobblestone strata, and the self-stability of the excavation face is poor; The shield sealing system is prone to failure: In the slurry balance mode, the mud is prone to leakage in the soil body, resulting in pressure imbalance.

[0037] Low-permeability formations refer to formations with extremely weak water permeability and extremely slow groundwater flow rates (such as clay, silty clay, silty soil, dense mudstone, weakly weathered intact bedrock, etc.). Their characteristics are low porosity, poor connectivity between particles, and difficulty for water and fluids to penetrate.

[0038] Characteristics of low-permeability formations: Poor groundwater mobility: Pore water pressure is transmitted slowly, and it is difficult to drain water through seepage; Fine particles and strong cementation: The proportion of fine particles (such as clay particles and silt particles) is high, the cohesive force of the soil mass is large, and the self-stability is good; Low permeability but high plasticity: Cohesive formations are prone to form plastic flow, but the water permeability is extremely weak.

[0039] The slurry discharge system of this embodiment integrates the slurry inlet passage 1 and the slurry discharge passage 2, combines with the intelligent control module, and realizes dynamic switching or collaborative work of multiple modes to improve the adaptability to complex formations, the slag discharge efficiency, and the construction safety. Through multi-mode dynamic switching, it covers the construction tunneling from low-permeability formations to high-permeability formations, and the mode switching can be achieved without stopping the machine.

[0040] The slurry inlet passage 1 is used to introduce the first slurry into the slurry chamber 100 and the air-cushion chamber 200. The specific type of the slurry inlet passage 1 can be set according to actual needs, and no limitation is imposed on this.

[0041] The slurry discharge passage 2 is used to discharge the second slurry from the slurry chamber 100 and the air-cushion chamber 200. The specific type of the slurry discharge passage 2 can be set according to actual needs, and no limitation is imposed on this.

[0042] The control module is used to control the on-off of the slurry inlet passage 1 and the slurry discharge passage 2 to achieve the switching of multiple slurry discharge modes. The specific type of the control module can be set according to actual needs, and no limitation is imposed on this.

[0043] In some embodiments, the control module is used to control the passage between the liquid inlet end of the slurry discharge passage 2 and the liquid outlet end of the air-cushion chamber 200 to conduct when the ratio of the product of the second flow rate and the second density to the product of the first flow rate and the first density is less than the first threshold; control the passage between the liquid inlet end of the slurry discharge passage 2 and the liquid outlet end of the slurry chamber 100 to conduct when the ratio of the product of the second flow rate and the second density to the product of the first flow rate and the first density is greater than the second threshold; control the passage between the liquid inlet end of the slurry discharge passage 2 and the liquid outlet end of the air-cushion chamber 200 to conduct, and the passage between the liquid inlet end of the slurry discharge passage 2 and the liquid outlet end of the slurry chamber 100 to conduct when the ratio of the product of the second flow rate and the second density to the product of the first flow rate and the first density is not less than the first threshold and not greater than the second threshold; wherein, the first threshold is less than the second threshold.

[0044] It can be understood that when the ratio of the product of the second flow rate and the second density to the product of the first flow rate and the first density is less than the first threshold value, the passage between the liquid inlet end of the slurry drainage passage 2 and the liquid outlet end of the air cushion chamber 200 is controlled to be open, thereby realizing the intermittent control and intermittent drainage mode, and then adapting to the shield working conditions of high permeability formations.

[0045] When the ratio of the product of the second flow rate and the second density to the product of the first flow rate and the first density is greater than the second threshold value, the passage between the liquid inlet end of the slurry discharge passage 2 and the liquid outlet end of the mud and water tank 100 is controlled to be open, thereby realizing the slurry discharge mode of intermittent control and direct discharge, and thus adapting to the shield working conditions of low permeability formations.

[0046] When the ratio of the product of the second flow rate and the second density to the product of the first flow rate and the first density is not less than the first threshold value and not greater than the second threshold value, the passage between the liquid inlet end of the slurry discharge passage 2 and the liquid outlet end of the air cushion chamber 200, as well as the passage between the liquid inlet end of the slurry discharge passage 2 and the liquid outlet end of the mud and water chamber 100 are controlled to be connected, thereby realizing an inter-controlled mixed slurry discharge mode, and thus adapting to the shield working conditions of low permeability and high permeability mixed strata.

[0047] Therefore, by comparing the mass flow rate of slurry discharge with the mass flow rate of slurry inflow, the material balance in the system can be directly linked. The logic is simple and it is easy to switch between different modes, thereby ensuring high construction quality and work efficiency of the shield system.

[0048] It should be noted that the ratio of the product of the second flow rate and the second density to the product of the first flow rate and the first density can be expressed as:

[0049] (Q out ×ρ out ) / (Q in ×ρ in );

[0050] Among them, Q out is the second flow rate, ρ out is the second density, Q in is the first flow rate, ρ in It is the first density.

[0051] The first threshold and the second threshold can be set according to actual needs and there is no restriction on this. For example, taking the first threshold as an example, the maximum load capacity of the equipment is analyzed. For example, the mass flow rate of the slurry discharge is allowed to be 5% higher than that of the slurry inlet, and the value of the first threshold is 1.05.

[0052] By setting reasonable first and second thresholds, equipment abnormalities can be effectively monitored to avoid overload or blockage risks.

[0053] In some embodiments, the control module is used to control the passageway between the liquid inlet end of the slurry discharge passage 2 and the liquid outlet end of the air cushion chamber 200 to be open when the second flow rate is not greater than the first flow rate, and the second density is greater than the first density and less than the blocking density threshold; when the second flow rate is greater than the sum of the first flow rate and the amount of slag pushed by the shield system, and the second density is greater than the theoretical density of the second slurry, the control module is used to control the passageway between the liquid inlet end of the slurry discharge passage 2 and the liquid outlet end of the mud and water chamber 100 to be open; wherein, the theoretical density of the second slurry ρ out is: out =((Q in ×ρ in )+(V×ρ s )) / (Q in +V), Q in is the first flow rate, ρ in is the first density, V is the amount of soil pushed by the shield system, ρ s is the density of soil.

[0054] It can be understood that when the second flow rate is not greater than the first flow rate, and the second density is greater than the first density and less than the blockage density threshold, the passage between the liquid inlet end of the slurry discharge passage 2 and the liquid outlet end of the air cushion chamber 200 is controlled to be conductive, thereby realizing the intermittent control and intermittent discharge slurry discharge mode, and then adapting to the shield working conditions of high permeability formations.

[0055] When the second flow rate is greater than the sum of the first flow rate and the amount of slag pushed by the shield system, and the second density is greater than the theoretical density of the second slurry, the passage between the liquid inlet end of the slurry discharge passage 2 and the liquid outlet end of the mud and water tank 100 is controlled to be open, thereby realizing the slurry discharge mode of intermittent control and direct discharge, and thus adapting to the shield working conditions of low permeability formations.

[0056] It should be noted that, under normal circumstances, the second flow rate should meet the following requirements: Q out =Q in +V.

[0057] Theoretical density of the second slurry ρ out is: out =((Q in ×ρ in )+(V×ρ s )) / Q out .

[0058] From this, it can be concluded that the theoretical density of the second slurry is out is: out =((Q in ×ρ in )+(V×ρ s )) / (Q in +V).

[0059] Take the shield tunneling condition in high permeability strata as an example:

[0060] Flow anomaly: The second flow rate is not greater than the first flow rate, indicating that mud infiltrates into the formation (the loss is Q = Q in -Q out is a positive value).

[0061] Density anomaly: The second density is greater than the first density, but does not reach the equipment safety threshold, that is, the second density is less than the blockage density threshold (assuming the second density is 1300 Kg / m 3 , the blockage density threshold can be set to 1800 Kg / m 3 , indicating system blockage).

[0062] In some embodiments, the control module is used to control the conduction of the path between the liquid inlet end of the slurry discharge path 2 and the liquid outlet end of the air cushion chamber 200 when the second density is greater than the product of the first density and the first multiple, and the second flow rate is less than the product of the first flow rate and the second multiple; when the second density is not greater than the product of the first density and the first multiple, and the second flow rate is not less than the product of the first flow rate and the second multiple, control the conduction of the path between the liquid inlet end of the slurry discharge path 2 and the liquid outlet end of the muddy water chamber 100; wherein, the first ratio is: (1 + α), α is the allowable density increase ratio, and the second ratio is: (1 - β), β is the allowable flow rate reduction ratio.

[0063] It can be understood that when the second density is greater than the product of the first density and the first multiple, and the second flow rate is less than the product of the first flow rate and the second multiple, control the conduction of the path between the liquid inlet end of the slurry discharge path 2 and the liquid outlet end of the air cushion chamber 200, so as to realize the slurry discharge mode of intermittent control and intermittent discharge, and further adapt to the shield working conditions of high-permeability formations.

[0064] When the second density is not greater than the product of the first density and the first multiple, and the second flow rate is not less than the product of the first flow rate and the second multiple, control the conduction of the path between the liquid inlet end of the slurry discharge path 2 and the liquid outlet end of the muddy water chamber 100, so as to realize the slurry discharge mode of intermittent control and direct discharge, and further adapt to the shield working conditions of low-permeability formations.

[0065] It should be noted that α and β can be set according to actual needs, and there is no limitation in this regard. For example, through historical data or tests, determine the safe change range of density and flow rate. For example: α = 0.2 means that the density can increase by at most 20%, and β = 0.1 means that the flow rate can decrease by at most 10%.

[0066] Based on the above three mode switching methods, the priority can be determined according to the actual situation during actual use. For example: taking the first method as the main, and the other two methods as the auxiliary, so as to realize the accurate switching of the mode.

[0067] In addition, it is also possible to optimize the thresholds in different methods based on machine learning or control models according to real-time working conditions, so as to achieve more accurate mode switching.

[0068] In some embodiments, the control module is further configured to control the slurry inlet passage 1 to be turned on according to the first flow rate and the first density, and the second flow rate and the second density, control the passage between the liquid inlet end of the slurry discharge passage 2 and the liquid outlet end of the slurry sump 100 to be turned on, and control the liquid level of the slurry sump 100 to be in a full-tank state or control the liquid level of the slurry sump 100 to be in a half-tank state.

[0069] It can be understood that the control module controls the slurry inlet passage 1 to be turned on and controls the passage between the liquid inlet end of the slurry discharge passage 2 and the liquid outlet end of the slurry sump 100 to be turned on, which can enable the first slurry to be transported to the slurry sump 100 and the air cushion chamber 200, and the second slurry formed by mixing the first slurry and the muck to be discharged from the slurry sump 100, so as to realize the slurry discharge mode of indirect control and direct discharge, and further adapt to the shield construction conditions of low-permeability strata. At the same time, the control module also controls the liquid level of the slurry sump 100 to be in a full-tank state or controls the liquid level of the slurry sump 100 to be in a half-tank state, so as to meet different shield requirements.

[0070] It should be noted that half-tank tunneling is a special construction mode, which means that the slurry in the slurry sump 100 is only filled to a partial capacity (usually 50%-70%) during tunneling, rather than the traditional full-tank full-slurry state. This mode needs to be comprehensively decided in combination with geological conditions, construction efficiency and risk control, and is generally applicable to strata with good self-stability such as clay layers and dense sand layers. The half-tank slurry can provide sufficient support force and reduce the slurry consumption at the same time.

[0071] Logic of the half-tank tunneling mode: Combine the geological data of the import system with the historical tunneling parameters, predict the trend of formation change and automatically switch between the half-tank / full-tank mode, and adjust parameters such as cutter head torque and propulsion speed (manual operation is supported). The equipment automatically switches to the indirect control and direct discharge mode, and monitors the excavation face pressure, liquid level, etc. in real time; dynamically adjusts the slurry flow rate and air pressure compensation value to ensure pressure balance in the half-tank state; prevents pipeline blockage by comparing the inlet and outlet slurry density and flow rate adaptive model; the equipment system is associated with the ground detection device, and the formation adaptive mode has a built-in risk warning mechanism. When the surface settlement rate exceeds the threshold, it is forced to switch to the full-tank mode.

[0072] The approximate steps are as follows: Automatically / manually start the half-tank mode, control the slurry inlet opening of the slurry sump 100, and fill the slurry to the set liquid level (feedback according to the set liquid level sensor); dynamically calculate the target pressure in real time, adjust the slurry and air pressure compensation, and feedback the pressure of the slurry sump 100 to the system; control the on-off of the slurry inlet according to the inlet and outlet slurry density, and feedback the density of the slurry sump 100 in real time; the equipment system is associated with the ground detection device to compare the actual settlement data with the predicted value, and trigger mode switching or parameter correction.

[0073] Such as Figure 1As shown, in some embodiments, the slurry discharge system further includes: a first bypass passage 3, wherein the liquid inlet end of the first bypass passage 3 is connected to the liquid outlet end of the slurry inlet passage 1, and the liquid outlet end of the first bypass passage 3 is connected to the liquid inlet end of the slurry discharge passage 2. The control module is further configured to control the conduction of the first bypass passage 3 when the first pressure of the mud and water tank 100 exceeds a first pressure threshold and / or the second pressure of the air cushion tank 200 exceeds a second pressure threshold, and to adjust the opening of the first bypass passage 3 according to the first pressure and the second pressure.

[0074] It can be understood that since the liquid inlet end of the first bypass passage 3 is connected to the liquid outlet end of the slurry inlet passage 1, and the liquid outlet end of the first bypass passage 3 is connected to the liquid inlet end of the slurry discharge passage 2, part of the first slurry in the slurry inlet passage 1 can enter the slurry discharge passage 2 through the first bypass passage 3. At the same time, when the first pressure of the mud and water tank 100 exceeds the first pressure threshold, and / or the second pressure of the air cushion tank 200 exceeds the second pressure threshold, the control module controls the conduction of the first bypass passage 3, and adjusts the opening of the first bypass passage 3 according to the first pressure and the second pressure, thereby realizing flow control of the first slurry, and thus ensuring the safe operation of the shield system.

[0075] It should be noted that when pressure anomalies, unexpected ground subsidence, pipe blockage, etc. occur, the first bypass passage 3 is used to adjust the first flow rate, and when the situation continues to deteriorate, the first bypass passage 3 is fully opened and switched to the conventional bypass mode.

[0076] The first bypass passage 3 is used for bypass flow of the first slurry. The specific type of the first bypass passage 3 can be set according to actual needs and is not limited thereto.

[0077] like Figure 1 As shown, in some embodiments, the slurry discharge system further includes: a backwash passage 4, wherein the liquid inlet end of the backwash passage 4 is respectively connected to the liquid inlet end of the mud and water tank 100 and the liquid inlet end of the air cushion tank 200, and the liquid outlet end of the backwash passage 4 is connected to the liquid inlet end of the slurry discharge passage 2. The control module is further configured to control the conduction of the first bypass passage 3 and the backwash passage 4 according to the first pressure and first liquid level of the mud and water tank 100, the second pressure and second liquid level of the air cushion tank 200, and the second flow rate and second density, so that the first slurry is respectively transported in the direction from the liquid outlet end to the liquid inlet end of the mud and water tank 100 and the direction from the liquid outlet end to the liquid inlet end of the air cushion tank 200 at a first reverse pressure.

[0078] It can be understood that since the liquid inlet end of the backwash passage 4 is respectively connected to the liquid inlet end of the mud and water tank 100 and the liquid inlet end of the air cushion tank 200, and the liquid outlet end of the backwash passage 4 is connected to the liquid inlet end of the slurry discharge passage 2, the slurry in the mud and water tank 100 and the air cushion tank 200 can be discharged from the liquid inlet end through the backwash passage 4 into the slurry discharge passage 2. At the same time, the control module controls the first bypass passage 3 and the backwash passage 4 to be connected according to the first pressure and first liquid level of the mud and water tank 100, the second pressure and second liquid level of the air cushion tank 200, and the second flow rate and second density, so that the first slurry is transported with the first reverse pressure in the direction from the liquid outlet end to the liquid inlet end of the mud and water tank 100 and the direction from the liquid outlet end to the liquid inlet end of the air cushion tank 200, thereby realizing low-pressure backwashing of the mud and water tank 100 and the air cushion tank 200, thereby ensuring the efficient operation of the shield system.

[0079] It should be noted that the backwash passage 4 is used to cooperate with the first bypass passage 3 to realize a conventional backwash mode. The specific type of the backwash passage 4 can be set according to actual needs and is not limited thereto.

[0080] like Figure 1 As shown, in some embodiments, the slurry discharge system also includes: a second bypass passage 5, the liquid inlet end of the second bypass passage 5 is connected to the liquid outlet end of the slurry inlet passage 1, and the liquid outlet end of the second bypass passage 5 is respectively connected to the liquid outlet end of the mud and water tank 100 and the liquid outlet end of the air cushion tank 200, wherein the control module is also used to control the conduction of the second bypass passage 5 and the backwash passage 4 according to the first pressure and the first liquid level of the mud and water tank 100, the second pressure and the second liquid level of the air cushion tank 200, and the second flow rate and the second density, so that the first slurry is transported at a second reverse pressure along the direction from the liquid outlet end to the liquid inlet end of the mud and water tank 100 and the direction from the liquid outlet end to the liquid inlet end of the air cushion tank 200; the second reverse pressure is greater than the first reverse pressure.

[0081] It can be understood that since the liquid inlet end of the second bypass passage 5 is connected to the liquid outlet end of the slurry inlet passage 1, and the liquid outlet end of the second bypass passage 5 is respectively connected to the liquid outlet end of the mud and water tank 100 and the liquid outlet end of the air cushion tank 200, part of the first slurry in the slurry inlet passage 1 can pass through the second bypass passage 5 and enter the mud and water tank 100 and the air cushion tank 200. At the same time, the control module controls the second bypass passage 5 and the backwash passage 4 to be connected according to the first pressure and first liquid level of the mud and water tank 100, the second pressure and second liquid level of the air cushion tank 200, and the second flow rate and second density, so that the first slurry is transported with the second reverse pressure in the direction from the liquid outlet end to the liquid inlet end of the mud and water tank 100 and the direction from the liquid outlet end to the liquid inlet end of the air cushion tank 200, thereby realizing high-pressure backwashing of the mud and water tank 100 and the air cushion tank 200, thereby ensuring the efficient operation of the shield system.

[0082] It should be noted that the second bypass passage 5 is used to cooperate with the backwashing passage 4 to implement the pressurized backwashing mode. The specific type of the second bypass passage 5 can be set according to actual needs, and no limitation is imposed thereon.

[0083] Among them, for the first pressure and the first liquid level of the mud sump 100, the second pressure and the second liquid level of the air cushion sump 200, as well as the second flow rate and the second density, when parameters such as pressure, liquid level, flow rate, and density are abnormal (beyond the preset range), the conventional backwashing mode is started. If a complex severe blockage occurs, such as when constructing in formations such as clay and muddy siltstone, and the abnormal degree of parameters such as pressure, liquid level, flow rate, and density is too large (far beyond the preset range), the pressurized backwashing mode is started.

[0084] When the parameters do not match the estimated values and the difference is large, the system automatically judges whether it is necessary to enter the pressurized backwashing mode, or can also remind the shield driver. After the driver confirms, it is automatically switched to the pressurized backwashing mode to flush the pipeline, and according to the parameters of the mud sump 100 and the air cushion sump 200 and the slurry discharge flow rate during flushing, the frequency of the flush pump is automatically controlled to quickly, efficiently, and with low energy consumption solve the problem of stagnant discharge. And the system is associated with the ground detection device, and according to the equipment parameters and the ground parameters, the end time of flushing is automatically judged (the upper limit time can be set, or the system can judge by itself and terminate in advance).

[0085] In some embodiments, the control module is further configured to control the first opening degree of the passage between the liquid outlet end of the slurry inlet passage 1 and the liquid inlet end of the mud sump 100 and the second opening degree of the passage between the liquid outlet end of the slurry inlet passage 1 and the liquid inlet end of the air cushion sump 200 according to a preset ratio, and, when the density of the mud sump 100 is greater than the density of the air cushion sump 200, increase the first opening degree; when the density of the mud sump 100 is less than the density of the air cushion sump 200, increase the second opening degree.

[0086] It can be understood that when the density of the mud sump 100 is greater than the density of the air cushion sump 200, the first opening degree is increased, so as to scour the cutter head to prevent mud cake formation, and dilute the concentration of the muck in the mud sump 100 to prevent the muck from blocking the slurry gate, crusher, intermediate discharge pipeline, etc.; when the density of the mud sump 100 is less than the density of the air cushion sump 200, the second opening degree is increased, so as to continuously scour the air cushion sump 200 to prevent the muck from depositing in the air cushion sump 200.

[0087] It should be noted that the preset ratio can be set according to actual needs, and no limitation is imposed thereon. By way of example, in the intermittent control intermittent discharge mode and the intermittent control direct discharge mode, the preset ratio can be 8:2, that is, the proportion of the slurry inlet flow rate of the air cushion sump 200 is 80%, and the proportion of the slurry inlet flow rate of the mud sump 100 is 20%; in the intermittent control mixed mode, the preset ratio can be 5:5, that is, the proportion of the slurry inlet flow rate of the air cushion sump 200 is 50%, and the proportion of the slurry inlet flow rate of the mud sump 100 is 50%.

[0088] The embodiment of the present disclosure further provides a slurry shield machine, comprising: a slurry discharge system as in the embodiment of the present disclosure.

[0089] It can be understood that through the cooperation of the slurry inlet passage 1, the slurry discharge passage 2 and the control module, different slurry discharge modes can be achieved according to different slurry states, thereby adapting to complex and changeable geological conditions and meeting diverse construction requirements, thereby effectively improving the construction quality and work efficiency of the shield system.

[0090] like Figure 1 As shown, the embodiment of the present disclosure also proposes a slurry discharge device for a slurry balance shield machine. The slurry discharge system of this embodiment realizes slurry discharge operation based on the slurry discharge device. The slurry discharge device includes: a slurry feed passage 1 and a slurry discharge passage 2. The slurry feed passage 1 includes: a first slurry feed branch pipe 11 and a second slurry feed branch pipe 12. The first slurry feed end 11 and the second slurry feed end 12 are respectively fed with the first slurry, and the liquid outlet end of the first slurry feed branch pipe 11 and the slurry tank 1 in the shield system are connected. 00 is connected to the liquid inlet end, the liquid outlet end of the second slurry inlet branch pipe 12 is connected to the liquid inlet end of the air cushion chamber 200 in the shield system, and the slurry discharge passage 2 includes: a first slurry discharge branch pipe 21 and a second slurry discharge branch pipe 22. The liquid inlet end of the first slurry discharge branch pipe 21 is connected to the liquid outlet end of the mud and water chamber 100, and the liquid inlet end of the second slurry discharge branch pipe 22 is connected to the liquid outlet end of the air cushion chamber 200. The liquid outlet end of the first slurry discharge branch pipe 21 and the liquid outlet end of the second slurry discharge branch pipe 22 respectively discharge the second slurry. Among them, the first slurry inlet branch pipe 11 and the second slurry inlet branch pipe 12 are conductive, and the first slurry discharge branch pipe 21 and / or the second slurry discharge branch pipe 22 are conductive.

[0091] It can be understood that, since the first slurry inlet end 11 and the second slurry inlet end 12 are respectively fed with the first slurry, and the liquid outlet end of the first slurry inlet end 11 is connected to the liquid inlet end of the mud and water tank 100 of the shield system, and the liquid outlet end of the second slurry inlet end 12 is connected to the liquid inlet end of the air cushion tank 200 of the shield system, the first slurry can enter the mud and water tank 100 of the shield system through the first slurry inlet end 11, and enter the shield system through the second slurry inlet end 12. In the air cushion bin 200 of the system; since the liquid inlet end of the first slurry branch pipe 21 is connected to the liquid outlet end of the mud and water bin 100, and the liquid inlet end of the second slurry branch pipe 22 is connected to the liquid outlet end of the air cushion bin 200, the liquid outlet end of the first slurry branch pipe 21 and the liquid outlet end of the second slurry branch pipe 22 respectively discharge the second slurry, so that the second slurry in the mud and water bin 100 can be discharged through the first slurry branch pipe 21, and the second slurry in the air cushion bin 200 can be discharged through the second slurry branch pipe 22.

[0092] When the first slurry inlet branch pipe 11 and the second slurry inlet branch pipe 12 are connected, and the first slurry discharge branch pipe 21 is connected, the first slurry can be transported to the mud and water tank 100 and the air cushion tank 200, and the second slurry mixed with the first slurry and slag can be discharged from the mud and water tank 100, thereby realizing an intermittently controlled direct discharge slurry discharge mode, and thus adapting to the shield working conditions of low permeability formations.

[0093] When the first slurry inlet branch pipe 11 and the second slurry inlet branch pipe 12 are connected, and the second slurry discharge branch pipe 22 is connected, the first slurry can be transported to the mud and water tank 100 and the air cushion tank 200, and the second slurry mixed with the first slurry and slag can be discharged from the air cushion tank 200, thereby realizing an intermittent control and intermittent discharge slurry mode, and thus adapting to the shield working conditions of high permeability formations.

[0094] When the first slurry inlet branch pipe 11 and the second slurry inlet branch pipe 12 are connected, and the second slurry discharge branch pipe 22 and the second slurry discharge branch pipe 22 are both connected, the first slurry can be transported to the mud and water tank 100 and the air cushion tank 200, and the second slurry mixed with the first slurry and slag can be discharged from the air cushion tank 200 and the mud and water tank 100, thereby realizing an intermittently controlled mixing slurry discharge mode, and thus adapting to the shield working conditions of low permeability and high permeability mixed strata.

[0095] Therefore, through the cooperation of the first slurry inlet branch pipe 11 and the second slurry inlet branch pipe 12 and the first slurry discharge branch pipe 21 and the second slurry discharge branch pipe 22, different slurry discharge modes can be achieved according to different slurry states, thereby adapting to complex and changeable geological conditions and meeting diverse construction requirements, thereby effectively improving the construction quality and work efficiency of the shield system.

[0096] It should be noted that the specific types of the first slurry inlet branch pipe 11 and the second slurry inlet branch pipe 12 can be set according to actual needs and are not limited to this. For example, the first slurry inlet branch pipe 11 and the second slurry inlet branch pipe 12 can be set as two groups respectively, thereby forming a redundant design to ensure stable slurry inflow into the mud and water tank 100 and the air cushion tank 200.

[0097] The specific types of the first pulp discharge pipe 21 and the second pulp discharge pipe 22 can be set according to actual needs and are not limited thereto.

[0098] like Figure 1 As shown, in some embodiments, the slurry discharge passage 2 further includes: a first valve body 23 and a second valve body 24, the first valve body 23 is arranged on the first slurry discharge branch pipe 21, and the first valve body 23 is used to selectively conduct the first slurry discharge branch pipe 21, and adjust the flow of the first slurry discharge branch pipe 21, the second valve body 24 is arranged on the second slurry discharge branch pipe 22, and the second valve body 24 is used to selectively conduct the second slurry discharge branch pipe 22, and adjust the flow of the second slurry discharge branch pipe 22.

[0099] It can be understood that when the first valve body 23 is turned on and the second valve body 24 is turned off, the second slurry formed by mixing the first slurry and the slag is discharged from the mud and water tank 100, thereby realizing the indirect discharge mode of slurry discharge, thereby adapting to the shield working conditions of low permeability formations.

[0100] When the first valve body 23 is disconnected and the second valve body 24 is connected, the second slurry formed by mixing the first slurry and the slag is discharged from the air cushion chamber 200, thereby realizing an intermittent control and intermittent discharge mode, thereby adapting to the shield working conditions in high permeability formations.

[0101] When the first valve body 23 is turned on and the second valve body 24 is turned on, the second slurry formed by mixing the first slurry and slag is discharged from the air cushion chamber 200 and the mud and water chamber 100, thereby realizing an intermittently controlled mixing slurry discharge mode, thereby adapting to the shield working conditions of low-permeability and high-permeability mixed strata.

[0102] It should be noted that based on the cooperation of the first valve body 23 and the second valve body 24, switching between different modes can be achieved. The specific types of the first valve body 23 and the second valve body 24 can be set according to actual needs and are not limited to this.

[0103] like Figure 1 As shown, in some embodiments, the slurry discharge passage 2 further includes: a first flow meter 25 and a second flow meter 26, the detection end of the first flow meter 25 is arranged on the first slurry discharge branch pipe 21, and the first flow meter 25 is used to detect the flow of the first slurry discharge branch pipe 21, the detection end of the second flow meter 26 is arranged on the second slurry discharge branch pipe 22, and the second flow meter 26 is used to detect the flow of the second slurry discharge branch pipe 22.

[0104] It can be understood that since the detection end of the first flowmeter 25 is set on the first slurry discharge branch pipe 21, the first flowmeter 25 can detect the flow of the first slurry discharge branch pipe 21, thereby facilitating the use of the flow of the first slurry discharge branch pipe 21 to achieve precise control of the system; since the detection end of the second flowmeter 26 is set on the second slurry discharge branch pipe 22, the second flowmeter 26 can detect the flow of the second slurry discharge branch pipe 22, thereby facilitating the use of the flow of the second slurry discharge branch pipe 22 to achieve precise control of the system.

[0105] It should be noted that the first flow meter 25 is used to detect the flow of the first pulp discharge pipe 21. The specific type of the first flow meter 25 can be set according to actual needs and is not limited to this.

[0106] The second flow meter 26 is used to detect the flow of the second pulp discharge pipe 22. The specific type of the second flow meter 26 can be set according to actual needs and is not limited to this.

[0107] Wherein, based on the flow rate of the first slurry discharge pipe 21 and the flow rate of the second slurry discharge pipe 22, the second flow rate of the second slurry can be obtained.

[0108] As Figure 1 shown, in some embodiments, the slurry inlet passage 1 further includes: a third valve body 13 and a fourth valve body 14. The third valve body 13 is disposed on the first sub-slurry inlet pipe 11, and the third valve body 13 is configured to selectively conduct the first sub-slurry inlet pipe 11 and regulate the flow rate of the first sub-slurry inlet pipe 11. The fourth valve body 14 is disposed on the second sub-slurry inlet pipe 12, and the fourth valve body 14 is configured to selectively conduct the second sub-slurry inlet pipe 12 and regulate the flow rate of the second sub-slurry inlet pipe 12.

[0109] It can be understood that when the third valve body 13 is conducted and the fourth valve body 14 is conducted, the first slurry can be conveyed to the mud water tank 100 and the air cushion tank 200. Meanwhile, by coordinating the opening adjustment of the third valve body 13 and the fourth valve body 14, the regulation of the flow rate ratio between the mud water tank 100 and the air cushion tank 200 can be achieved, thereby ensuring the efficient operation of the system.

[0110] It should be noted that the specific types of the third valve body 13 and the fourth valve body 14 can be set according to actual needs, and no limitation is imposed thereon.

[0111] As Figure 1 shown, in some embodiments, the slurry inlet passage 1 further includes: a third flow meter 15 and a fourth flow meter 16. The detection end of the third flow meter 15 is disposed on the first sub-slurry inlet pipe 11, and the third flow meter 15 is configured to detect the flow rate of the first sub-slurry inlet pipe 11. The detection end of the fourth flow meter 16 is disposed on the second sub-slurry inlet pipe 12, and the fourth flow meter 16 is configured to detect the flow rate of the second sub-slurry inlet pipe 12.

[0112] It can be understood that since the detection end of the third flow meter 15 is disposed on the first sub-slurry inlet pipe 11, the third flow meter 15 can detect the flow rate of the first sub-slurry inlet pipe 11, thereby facilitating the precise control of the system by using the flow rate of the first sub-slurry inlet pipe 11. Since the detection end of the fourth flow meter 16 is disposed on the second sub-slurry inlet pipe 12, the fourth flow meter 16 can detect the flow rate of the second sub-slurry inlet pipe 12, thereby facilitating the precise control of the system by using the flow rate of the second sub-slurry inlet pipe 12.

[0113] It should be noted that the third flow meter 15 is configured to detect the flow rate of the first sub-slurry inlet pipe 11, and the specific type of the third flow meter 15 can be set according to actual needs, and no limitation is imposed thereon.

[0114] The fourth flow meter 16 is configured to detect the flow rate of the second sub-slurry inlet pipe 12, and the specific type of the fourth flow meter 16 can be set according to actual needs, and no limitation is imposed thereon.

[0115] Among them, based on the flow rate of the first sub-slurry inlet pipe 11 and the flow rate of the second sub-slurry inlet pipe 12, the first flow rate of the first slurry can be obtained.

[0116] For the first density and the second density, they can be obtained by using the densitometers arranged on the branch pipes in this system, or by using the densitometers in the slurry treatment system, and there is no limitation in this regard.

[0117] As Figure 1 shown, in some embodiments, the slurry inlet passage 1 further includes: a slurry inlet main pipe 17, a slurry inlet pump 18, and a fifth valve body 19. The liquid inlet end of the slurry inlet main pipe 17 is introduced with the first slurry, and the liquid outlet end of the slurry inlet main pipe 17 is respectively connected to the liquid inlet ends of the first slurry inlet branch pipe 11 and the second slurry inlet branch pipe 12. The slurry inlet pump 18 and the fifth valve body 19 are sequentially arranged on the slurry inlet main pipe 17 along the direction from the liquid inlet end to the liquid outlet end of the slurry inlet main pipe 17. The fifth valve body 19 is used to selectively conduct the slurry inlet main pipe 17 and regulate the flow rate of the slurry inlet main pipe 17;

[0118] The slurry discharge passage 2 further includes: a slurry discharge main pipe 27, a sixth valve body 28, and a slurry discharge pump 29. The liquid inlet end of the slurry discharge main pipe 27 is respectively connected to the liquid outlet ends of the first slurry discharge branch pipe 21 and the second slurry discharge branch pipe 22, and the liquid outlet end of the slurry discharge main pipe 27 is used to discharge the second slurry. The sixth valve body 28 and the slurry discharge pump 29 are sequentially arranged on the slurry discharge main pipe 27 along the direction from the liquid inlet end to the liquid outlet end of the slurry discharge main pipe 27. The sixth valve body 28 is used to selectively conduct the slurry discharge main pipe 27 and regulate the flow rate of the slurry discharge main pipe 27.

[0119] It can be understood that since the liquid inlet end of the slurry inlet main pipe 17 is introduced with the first slurry, and the liquid outlet end of the slurry inlet main pipe 17 is respectively connected to the liquid inlet ends of the first slurry inlet branch pipe 11 and the second slurry inlet branch pipe 12, the first slurry can enter the slurry chamber 100 of the shield system through the slurry inlet main pipe 17 and the first slurry inlet branch pipe 11, and enter the air cushion chamber 200 of the shield system through the slurry inlet main pipe 17 and the second slurry inlet branch pipe 12; since the liquid inlet end of the slurry discharge main pipe 27 is respectively connected to the liquid outlet ends of the first slurry discharge branch pipe 21 and the second slurry discharge branch pipe 22, and the liquid outlet end of the slurry discharge main pipe 27 is used to discharge the second slurry, the second slurry in the slurry chamber 100 can be discharged through the first slurry discharge branch pipe 21 and the slurry discharge main pipe 27, and the second slurry in the air cushion chamber 200 can be discharged through the second slurry discharge branch pipe 22 and the slurry discharge main pipe 27.

[0120] Since the slurry inlet pump 18 and the fifth valve body 19 are sequentially arranged on the slurry inlet main pipe 17 along the direction from the liquid inlet end to the liquid outlet end of the slurry inlet main pipe 17, the first slurry can be pressurized and transported by using the slurry inlet pump 18, and the on-off control and opening degree adjustment can be realized by using the fifth valve body 19, so as to meet the precise operation requirements of the system.

[0121] Since the sixth valve body 28 and the slurry discharge pump 29 are sequentially arranged on the slurry discharge main pipe 27 along the direction from the liquid inlet end to the liquid outlet end of the slurry discharge main pipe 27, the second slurry can be pressurized and transported by the slurry discharge pump 29, and the on-off control and opening degree adjustment can be realized by the sixth valve body 28, so as to meet the accurate operation requirements of the system.

[0122] It should be noted that the slurry inlet pump 18 is used for the pressurized transportation of the first slurry, and the slurry discharge pump 29 is used for the pressurized transportation of the second slurry. The specific types of the slurry inlet pump 18 and the slurry discharge pump 29 can be set according to actual needs, and no limitation is made thereto.

[0123] The fifth valve body 19 is used for the on-off control and flow regulation of the first slurry main path, and the sixth valve body 28 is used for the on-off control and flow regulation of the second slurry main path. The specific types of the fifth valve body 19 and the sixth valve body 28 can be set according to actual needs, and no limitation is made thereto.

[0124] Among them, for the slurry discharge modes of intermittent control and intermittent discharge, intermittent control and direct discharge, and intermittent control and mixing, the fifth valve body 19 and the sixth valve body 28 always remain open, and the flow rate can be adjusted by controlling the opening degree.

[0125] Such as Figure 1 As shown, in some embodiments, the slurry discharge device further includes: a first bypass passage 3, and the first bypass passage 3 includes: a first bypass pipeline 31 and a seventh valve body 32. The liquid inlet end of the first bypass pipeline 31 is connected to the slurry inlet main pipe 17 and is located between the slurry inlet pump 18 and the fifth valve body 19, and the liquid outlet end of the first bypass pipeline 31 is connected to the slurry discharge main pipe 27 and is located at one end of the sixth valve body 28 away from the slurry discharge pump 29. The seventh valve body 32 is arranged on the first bypass pipeline 31, and the seventh valve body 32 is used for selectively opening the first bypass pipeline 31 and regulating the flow rate of the first bypass pipeline 31.

[0126] It can be understood that since the liquid inlet end of the first bypass pipeline 31 is connected to the slurry inlet main pipe 17 and is located between the slurry inlet pump 18 and the fifth valve body 19, and the liquid outlet end of the first bypass pipeline 31 is connected to the slurry discharge main pipe 27 and is located at one end of the sixth valve body 28 away from the slurry discharge pump 29, and the seventh valve body 32 is arranged on the first bypass pipeline 31, when the seventh valve body 32 is opened, part of the first slurry in the slurry inlet main pipe 17 can enter the slurry discharge passage 2 through the first bypass pipeline 31, and moreover, by controlling the opening degree of the seventh valve body 32, the flow rate of the slurry inlet main pipe 17 can also be adjusted, so as to meet the accurate operation requirements of the system.

[0127] It should be noted that the seventh valve body 32 is used for the bypass control of the slurry inlet, and the specific type of the seventh valve body 32 can be set according to actual needs, and no limitation is made thereto.

[0128] In the normal bypass mode, the fifth valve body 19, the sixth valve body 28, and the seventh valve body 32 are all conducting.

[0129] As Figure 1 shown, in some embodiments, the slurry discharging device further includes: a backwashing passage 4, the backwashing passage 4 includes: a backwashing pipeline 41 and an eighth valve body 42, the liquid inlet end of the backwashing pipeline 41 is connected to the total slurry inlet pipe 17 and is located at one end of the fifth valve body 19 away from the slurry inlet pump 18, and the liquid outlet end of the backwashing pipeline 41 is connected to the total slurry discharging pipe 27 and is located between the sixth valve body 28 and the slurry discharging pump 29, the eighth valve body 42 is arranged on the backwashing pipeline 41, and the eighth valve body 42 is used for selectively conducting the backwashing pipeline 41 and adjusting the flow rate of the backwashing pipeline 41.

[0130] It can be understood that since the liquid inlet end of the backwashing pipeline 41 is connected to the total slurry inlet pipe 17 and is located at one end of the fifth valve body 19 away from the slurry inlet pump 18, and the liquid outlet end of the backwashing pipeline 41 is connected to the total slurry discharging pipe 27 and is located between the sixth valve body 28 and the slurry discharging pump 29, and the eighth valve body 42 is arranged on the backwashing pipeline 41, when the fifth valve body 19 and the sixth valve body 28 are disconnected, and the seventh valve body 32 and the eighth valve body 42 are conducting, the first slurry in the total slurry inlet pipe 17 can enter the mud sump 100 and the air cushion sump 200 through the first bypass pipeline 31, and is discharged through the backwashing passage 4 and the total slurry discharging pipe 27, thereby realizing the backwashing of the mud sump 100 and the air cushion sump 200, and further ensuring the efficient operation of the system.

[0131] It should be noted that the backwashing passage 4 is used to cooperate with the first bypass pipeline 31 to realize backwashing, the eighth valve body 42 is used to control the on-off and flow rate adjustment of the backwashing passage 4, and the specific type of the eighth valve body 42 can be set according to actual needs, and no limitation is made thereto.

[0132] As Figure 1 shown, in some embodiments, the slurry discharging device further includes: a second bypass passage 5, the second bypass passage 5 includes: a second bypass pipeline 51, a ninth valve body 52, and a booster pump 53, the liquid inlet end of the second bypass pipeline 51 is connected to the total slurry inlet pipe 17 and is located between the slurry inlet pump 18 and the fifth valve body 19, and the liquid outlet end of the second bypass pipeline 51 is connected to the total slurry discharging pipe 27 and is located at one end of the sixth valve body 28 away from the slurry discharging pump 29, the ninth valve body 52 and the booster pump 53 are respectively arranged on the second bypass pipeline 51, and the ninth valve body 52 is used for selectively conducting the second bypass pipeline 51.

[0133] It can be understood that since the liquid inlet end of the second bypass pipeline 51 is connected to the slurry inlet main pipe 17 and is located between the slurry inlet pump 18 and the fifth valve body 19, and the liquid outlet end of the second bypass pipeline 51 is connected to the slurry discharge main pipe 27 and is located at one end of the sixth valve body 28 away from the slurry discharge pump 29, the ninth valve body 52 and the booster pump 53 are respectively arranged on the second bypass pipeline 51. When the fifth valve body 19, the sixth valve body 28 and the seventh valve body 32 are disconnected, and the eighth valve body 42 and the ninth valve body 52 are conducted, the first slurry in the slurry inlet main pipe 17 can enter the mud water tank 100 and the air cushion tank 200 through the second bypass pipeline 51, and be discharged through the backwashing passage 4 and the slurry discharge main pipe 27. At the same time, the booster pump 53 pressurizes and conveys the slurry, thereby realizing the pressurized backwashing of the mud water tank 100 and the air cushion tank 200, and further ensuring the efficient operation of the system.

[0134] It should be noted that the second bypass passage 5 is used to cooperate with the backwashing passage 4 to realize the pressurized backwashing mode. The ninth valve body 52 is used to control the on-off and flow regulation of the second bypass passage 5. The booster pump 53 is used for the pressurized conveying of the backwashing slurry. The specific types of the ninth valve body 52 and the booster pump 53 can be set according to actual needs, and there is no limitation on this. Among them, the ninth valve body 52 can be set to two and are respectively arranged at both ends of the booster pump 53.

[0135] As Figure 1 shown, in some embodiments, the slurry discharge device further includes: a monitoring module 6, and the monitoring module 6 includes: a first density meter 61, a first pressure sensor 62, a first liquid level sensor 63, a second density meter 64, a second pressure sensor 65 and a second liquid level sensor 66. Among them, the detection end of the first density meter 61 is arranged in the mud water tank 100, and the first density meter 61 is used to detect the density of the mud water tank 100. The detection end of the first pressure sensor 62 is arranged in the mud water tank 100, and the first pressure sensor 62 is used to detect the pressure of the mud water tank 100. The detection end of the first liquid level sensor 63 is arranged in the mud water tank 100, and the first liquid level sensor 63 is used to detect the liquid level of the mud water tank 100. The detection end of the second density meter 64 is arranged in the air cushion tank 200, and the second density meter 64 is used to detect the density of the air cushion tank 200. The detection end of the second pressure sensor 65 is arranged in the air cushion tank 200, and the second pressure sensor 65 is used to detect the pressure of the air cushion tank 200. The detection end of the second liquid level sensor 66 is arranged in the air cushion tank 200, and the second liquid level sensor 66 is used to detect the liquid level of the air cushion tank 200.

[0136] It can be understood that by arranging the first densitometer 61, the first pressure sensor 62 and the first liquid level sensor 63, the density, pressure and liquid level of the slurry sump 100 can be obtained. Moreover, by arranging the second densitometer 64, the second pressure sensor 65 and the second liquid level sensor 66, the density, pressure and liquid level of the air cushion chamber 200 can be obtained. Thus, the accurate operation requirements of the system can be met.

[0137] It should be noted that both the first densitometer 61 and the second densitometer 64 are densitometers for detecting density. The specific types of the first densitometer 61 and the second densitometer 64 can be set according to actual needs, and no limitation is imposed thereon.

[0138] Both the first pressure sensor 62 and the second pressure sensor 65 are pressure sensors for detecting pressure. The specific types of the first pressure sensor 62 and the second pressure sensor 65 can be set according to actual needs, and no limitation is imposed thereon.

[0139] Both the first liquid level sensor 63 and the second liquid level sensor 66 are liquid level sensors for detecting liquid level. The specific types of the first liquid level sensor 63 and the second liquid level sensor 66 can be set according to actual needs, and no limitation is imposed thereon.

[0140] It should be noted that in the description of the present disclosure, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, the meaning of "a plurality" is two or more.

[0141] Any process or method description shown in the flowchart or described in other ways herein can be understood to represent a module, segment or part of executable instructions including one or more steps for implementing a specific logical function or process. The scope of the preferred embodiments of the present disclosure includes additional implementations, where the functions can be executed in a substantially simultaneous manner or in a reverse order according to the functions involved, rather than in the order shown or discussed. This should be understood by those skilled in the technical field to which the embodiments of the present disclosure belong.

[0142] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0143] Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A pulp discharging system, characterized in that, Including: A slurry inlet passage, the liquid inlet end of the slurry inlet passage is connected to a first slurry, and the liquid outlet end of the slurry inlet passage is respectively connected to the liquid inlet end of the slurry chamber and the liquid inlet end of the air cushion chamber in the shield system; A slurry discharge passage, the liquid inlet end of the slurry discharge passage is respectively connected to the liquid outlet end of the slurry chamber and the liquid outlet end of the air cushion chamber, and the liquid outlet end of the slurry discharge passage discharges a second slurry; A control module, the control module is used to control the conduction of the slurry inlet passage according to the first flow rate and the first density of the first slurry and the second flow rate and the second density of the second slurry, and control the conduction of the passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the air cushion chamber, and / or the conduction of the passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the slurry chamber.

2. The pulp discharging system according to claim 1, wherein The control module is used for When the ratio of the product of the second flow rate and the second density to the product of the first flow rate and the first density is less than a first threshold, controlling the conduction of the passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the air cushion chamber; When the ratio of the product of the second flow rate and the second density to the product of the first flow rate and the first density is greater than a second threshold, controlling the conduction of the passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the slurry chamber; When the ratio of the product of the second flow rate and the second density to the product of the first flow rate and the first density is not less than the first threshold and not greater than the second threshold, controlling the conduction of the passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the air cushion chamber, and the conduction of the passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the slurry chamber; Wherein, the first threshold is less than the second threshold.

3. The slurry discharging system according to claim 1, wherein [[ID=⑨]]The control module is used for When the second flow rate is not greater than the first flow rate, and the second density is greater than the first density and less than a clogging density threshold, controlling the conduction of the passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the air cushion chamber; When the second flow rate is greater than the sum of the first flow rate and the amount of muck advanced by the shield system, and the second density is greater than the theoretical density of the second slurry, controlling the conduction of the passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the slurry chamber; Among them, the theoretical density ρ of the second slurry out is: ρ out = ((Q in × ρ in ) + (V × ρ s )) / (Q in + V), where Q in is the first flow rate, ρ in is the first density, V is the amount of muck advanced by the shield system, and ρ s is the muck density.

4. The slurry discharging system according to claim 1, wherein The control module is used for When the second density is greater than the product of the first density and a first multiple, and the second flow rate is less than the product of the first flow rate and a second multiple, controlling the conduction of the passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the air cushion chamber; When the second density is not greater than the product of the first density and the first multiple, and the second flow rate is not less than the product of the first flow rate and the second multiple, controlling the conduction of the passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the slurry chamber; Wherein, the first ratio is: (1 + α), and α is the allowable density increase ratio; The second ratio is: (1 - β), and β is the allowable flow rate reduction ratio.

5. The slurry discharging system according to claim 1, characterized in that, The control module is also used to control the conduction of the slurry inlet passage according to the first flow rate and the first density and the second flow rate and the second density, and control the conduction of the passage between the liquid inlet end of the slurry discharge passage and the liquid outlet end of the slurry chamber, and, The liquid level of the mud and water tank is controlled to be in a full tank state, or the liquid level of the mud and water tank is controlled to be in a half tank state.

6. The slurry discharging system according to claim 1, characterized in that The slurry discharge system also includes: a first bypass passage, wherein a liquid inlet end of the first bypass passage is connected to a liquid outlet end of the slurry inlet passage, and a liquid outlet end of the first bypass passage is connected to a liquid inlet end of the slurry discharge passage; In which, the control module is also used to control the conduction of the first bypass passage when the first pressure of the mud and water tank exceeds a first pressure threshold, and / or the second pressure of the air cushion tank exceeds a second pressure threshold, and to adjust the opening of the first bypass passage according to the first pressure and the second pressure.

7. The slurry discharging system according to claim 6, wherein The slurry discharge system also includes: A backwash passage, wherein a liquid inlet end of the backwash passage is connected to the liquid inlet end of the mud and water bin and the liquid inlet end of the air cushion bin, respectively, and a liquid outlet end of the backwash passage is connected to the liquid inlet end of the slurry discharge passage; In which, the control module is also used to control the conduction of the first bypass passage and the backwash passage according to the first pressure and the first liquid level of the mud and water tank, the second pressure and the second liquid level of the air cushion tank, the second flow rate and the second density, so that the first slurry is transported at a first reverse pressure along the direction from the liquid outlet end to the liquid inlet end of the mud and water tank and the direction from the liquid outlet end to the liquid inlet end of the air cushion tank.

8. The slurry discharging system according to claim 7, characterized in that, The slurry discharge system also includes: a second bypass passage, wherein a liquid inlet end of the second bypass passage is connected to a liquid outlet end of the slurry inlet passage, and a liquid outlet end of the second bypass passage is connected to a liquid outlet end of the mud and water bin and a liquid outlet end of the air cushion bin, respectively; The control module is further configured to control the second bypass passage and the backwash passage to be connected according to the first pressure and first liquid level of the mud and water tank, the second pressure and second liquid level of the air cushion tank, the second flow rate, and the second density, so that the first slurry is transported at a second reverse pressure in a direction from a liquid outlet end to a liquid inlet end of the mud and water tank and in a direction from a liquid outlet end to a liquid inlet end of the air cushion tank, respectively. The second reverse pressure is greater than the first reverse pressure.

9. The slurry discharging system according to claim 1, wherein The control module is further configured to control a first opening of the passage between the liquid outlet end of the slurry inlet passage and the liquid inlet end of the mud and water bin, and a second opening of the passage between the liquid outlet end of the slurry inlet passage and the liquid inlet end of the air cushion bin according to a preset ratio, and When the density of the mud and water bin is greater than the density of the air cushion bin, increasing the first opening; When the density of the mud and water bin is less than the density of the air cushion bin, the second opening is increased.

10. A slurry shield machine, characterized in that, include: The slurry discharge system according to any one of claims 1 to 9.

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