Shield muck conveying system

Abstract

The invention provides a shield muck conveying system which comprises a first spiral conveyor, a second spiral conveyor, a first conveying device and a second conveying device. The feeding end of the first spiral conveyor is connected with the first discharging end of a muck bin of shield equipment. The feeding end of the second screw conveyor is connected with the discharging end of the first screw conveyor, and the discharging end of the second screw conveyor is connected with the feeding end of dumping equipment of the shield equipment; the output end of the control device is connected with the input end of the first spiral conveyor and the input end of the second spiral conveyor, and the control device is used for controlling the rotating speed of the second spiral conveyor to be smaller than the rotating speed of the first spiral conveyor when the gushing parameter of the second spiral conveyor is larger than a preset value. And a soil plug is formed between the first screw conveyor and the second screw conveyor. According to the shield muck conveying system, muck is gathered between the first screw conveyor and the second screw conveyor through the speed difference, so that a soil plug is formed, and the gushing phenomenon is prevented.

Description

Technical Field

[0001] The present disclosure relates to the technical field of slag transportation, and in particular to a shield slag transportation system. Background Art

[0002] During the shield tunneling process, the soil at the head of the machine is cut by the cutter disc and then pushed into the soil bin, and the soil in the soil bin is transported to the outside of the tunnel by the screw machine and other soil discharge equipment, thus completing the soil discharge work. However, in the process of the screw machine transporting the slag, a large amount of muddy water is likely to spray out from the discharge end of the screw machine, causing a gushing phenomenon, which not only damages the construction environment, but also seriously affects the construction progress due to the cleaning of the slag. At the same time, the actual amount of soil discharged cannot be effectively controlled during the gushing process, which makes it difficult to establish a true earth pressure balance during the shield advancement process, thereby increasing the disturbance to the stratum and even causing disasters such as surface collapse. Summary of the invention

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

[0004] To this end, the purpose of the present disclosure is to provide a shield slag conveying system.

[0005] To achieve the above-mentioned purpose, the present disclosure provides a shield slag conveying system, comprising: a first screw conveyor, wherein the feed end of the first screw conveyor is connected to the first discharge end of the soil bin of the shield equipment; a second screw conveyor, wherein the feed end of the second screw conveyor is connected to the discharge end of the first screw conveyor, and the discharge end of the second screw conveyor is connected to the feed end of the soil discharge equipment of the shield equipment; a control device, wherein the output end of the control device is respectively connected to the input end of the first screw conveyor and the input end of the second screw conveyor, and the control device is used to control the rotation speed of the second screw conveyor to be lower than the rotation speed of the first screw conveyor when the ejection parameter of the second screw conveyor is greater than a preset value, so as to form a soil plug between the first screw conveyor and the second screw conveyor.

[0006] Optionally, the conveying system also includes: a spherical bearing, which is arranged between the feed end of the second screw conveyor and the discharge end of the first screw conveyor, and one end of the spherical bearing is connected to the discharge end of the first screw conveyor, and the other end of the spherical bearing is connected to the feed end of the second screw conveyor.

[0007] Optionally, the conveying system also includes: a pressure regulating device, the pressure regulating device includes: a mud and water station, a slurry feed pump and a slurry discharge pump, the feed end of the slurry feed pump is connected to the discharge end of the mud and water station, and the discharge end of the slurry feed pump is connected to the feed end of the soil bin, the feed end of the slurry discharge pump is connected to the second discharge end of the soil bin, and the discharge end of the slurry discharge pump is connected to the feed end of the mud and water station; wherein the output end of the control device is respectively connected to the input end of the slurry feed pump and the input end of the slurry discharge pump, and the control device is used to control the rotation speed of the slurry feed pump and / or the rotation speed of the slurry discharge pump so that the pressure of the soil bin is within a preset pressure range.

[0008] Optionally, the conveying system also includes: a density regulating device, the density regulating device includes: a first valve and a second valve, the first valve is arranged between the discharge end of the first screw conveyor and the discharge end of the slurry feed pump, and the second valve is arranged between the discharge end of the first screw conveyor and the feed end of the slurry discharge pump; wherein the output end of the control device is respectively connected to the input end of the first valve and the input end of the second valve, and the control device is used to control the opening and closing of the first valve and the second valve to adjust the density of the slag at the discharge end of the first screw conveyor.

[0009] Optionally, the pressure regulating device also includes: a third valve and a fourth valve, the third valve and the fourth valve are respectively arranged between the discharge end of the slurry feed pump and the feed end of the slurry discharge pump, and the third valve is arranged on the shield equipment, and the fourth valve is arranged away from the shield equipment.

[0010] Optionally, the conveying system also includes: a flushing device, the flushing device includes: a foam box and a plurality of foam pumps, the feed end of the foam pump is connected to the discharge end of the foam box, and the discharge end of the foam pump is connected to the front flushing end of the cutter disc in the shield equipment; wherein the output end of the control device is connected to the input end of the foam pump, and the control device is used to control the foam pump to turn on when in soil pressure mode.

[0011] Optionally, the flushing device also includes: a flushing pump and a plurality of three-way valves, the feed end of the flushing pump being connected to the discharge end of the mud and water station, and the discharge end of the flushing pump being respectively connected to the feed end of the foam pump and the flushing end of the second discharge end of the soil bin, the feed end of the three-way valve being connected to the discharge end of the foam pump, the first discharge end of the three-way valve being connected to the front flushing end of the cutter disc, and the second feed end of the three-way valve being connected to the back flushing end of the cutter disc; wherein the output end of the control device is respectively connected to the input end of the flushing pump and the input end of the three-way valve, and the control device is used to control the foam pump to be turned on when in soil pressure mode, and to control the feed end and the first discharge end of the three-way valve to be connected, and, when in mud and water mode, to control the flushing pump and the foam pump to be turned on, and to control the feed end and the second discharge end of the three-way valve to be connected.

[0012] Optionally, the pressure regulating device also includes: a first slurry inlet pipe and a second slurry inlet pipe, the first slurry inlet pipe and the second slurry inlet pipe are arranged between the discharge end of the slurry inlet pump and the feed end of the soil bin, and the feed end of the first slurry inlet pipe is connected to the discharge end of the slurry inlet pump, and the discharge end of the second slurry inlet pipe is connected to the feed end of the soil bin; the conveying system also includes: a pipe changing device, the pipe changing device includes: a pipe changing rack, a slide, a winding disk, a slurry inlet hose and a driving mechanism, the pipe changing rack is arranged away from the shield equipment, and the slide is slidably arranged on the pipe changing rack along the shield direction, the winding disk is rotatably arranged on the slide, the feed end of the slurry inlet hose is connected to the discharge end of the first slurry inlet pipe, and the discharge end of the slurry inlet hose bypasses the winding disk and is connected to the feed end of the second slurry inlet pipe, the driving mechanism is arranged on the pipe changing rack, the driving end of the driving mechanism is connected to the slide, and the driving mechanism is used to drive the slide to move to the end of the pipe changing rack away from the shield equipment.

[0013] Optionally, the pressure regulating device also includes: a first slurry row pipe and a second slurry row pipe, the first slurry row pipe and the second slurry row pipe are arranged between the feed end of the slurry row pump and the second discharge end of the soil bin, and the feed end of the first slurry row pipe is connected to the second discharge end of the soil bin, and the discharge end of the second slurry row pipe is connected to the feed end of the slurry row pump; the pipe changing device also includes: a slurry row hose, the discharge end of the slurry row hose is connected to the feed end of the second slurry row pipe, and the feed end of the slurry row hose bypasses the winding disk and is connected to the discharge end of the first slurry row pipe.

[0014] Optionally, the feed end of the slurry inlet hose is located above the discharge end of the slurry inlet hose, and the feed end of the slurry discharge hose is located below the discharge end of the slurry discharge hose; the pipe changing device also includes: a plurality of guide rollers, the guide rollers are rotatably arranged on the pipe changing rack, and the plurality of guide rollers are spaced apart along the shield direction, the discharge end of the slurry inlet hose and the feed end of the slurry discharge hose respectively bypass the winding disk and are arranged on the guide rollers.

[0015] The technical solution provided by the present disclosure may have the following beneficial effects:

[0016] When the gushing parameter of the second screw conveyor is greater than a preset value, the control device controls the rotation speed of the second screw conveyor to be lower than that of the first screw conveyor, so that the debris in the first screw conveyor is pushed forward faster, while the debris in the second screw conveyor is pushed forward slower. The speed difference is utilized to gather the debris between the first screw conveyor and the second screw conveyor, thereby forming a soil plug, and then the soil plug is utilized to effectively prevent the occurrence of gushing.

[0017] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description or learned through 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 apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 It is a structural schematic diagram of the first screw conveyor in the shield slag conveying system proposed in one embodiment of the present disclosure;

[0020] Figure 2 It is a schematic diagram of the flow path of a pressure regulating device in a shield slag conveying system proposed in an embodiment of the present disclosure;

[0021] Figure 3 It is a schematic diagram of the flow path of a flushing device in a shield slag conveying system proposed in an embodiment of the present disclosure;

[0022] Figure 4 It is a structural schematic diagram of a pipe replacement device in a shield slag conveying system proposed in an embodiment of the present disclosure;

[0023] As shown in the figure: 1. The first screw conveyor, 2. The second screw conveyor, 3. The spherical bearing;

[0024] 4. Pressure regulating device, 41. Mud and water station, 42. Slurry inlet pump, 43. Slurry discharge pump, 44. Third valve, 45. Fourth valve, 46. First slurry inlet pipe, 47. Second slurry inlet pipe, 48. First slurry discharge pipe, 49. Second slurry discharge pipe;

[0025] 5. density adjustment device, 51. first valve, 52. second valve;

[0026] 6. Flushing device, 61. Foam box, 62. Foam pump, 63. Flushing pump, 64. Three-way valve;

[0027] 7. tube changing device, 71. tube changing rack, 72. slide seat, 73. winding disc, 74. pulp inlet hose, 75. driving mechanism, 76. guide roller;

[0028] 8. Earth storage, 9. Knife plate. DETAILED DESCRIPTION

[0029] Embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present disclosure, and are not to be construed as limitations of the present disclosure. On the contrary, the embodiments of the present disclosure include all changes, modifications, and equivalents that fall within the spirit and connotation of the appended claims.

[0030] like Figure 1 As shown, the embodiment of the present disclosure proposes a shield slag conveying system, including: a first screw conveyor 1, a second screw conveyor 2 and a control device (not shown in the figure), the feed end of the first screw conveyor 1 is connected to the first discharge end of the soil bin 8 of the shield equipment, the feed end of the second screw conveyor 2 is connected to the discharge end of the first screw conveyor 1, and the discharge end of the second screw conveyor 2 is connected to the feed end of the earth discharge equipment of the shield equipment, the output end of the control device is respectively connected to the input end of the first screw conveyor 1 and the input end of the second screw conveyor 2, and the control device is used to control the rotation speed of the second screw conveyor 2 to be lower than the rotation speed of the first screw conveyor 1 when the gushing parameter of the second screw conveyor 2 is greater than a preset value, so as to form a soil plug between the first screw conveyor 1 and the second screw conveyor 2.

[0031] It can be understood that since the feed end of the first screw conveyor 1 is connected to the first discharge end of the soil bin 8 of the shield equipment, and the feed end of the second screw conveyor 2 is connected to the discharge end of the first screw conveyor 1, and the discharge end of the second screw conveyor 2 is connected to the feed end of the soil discharge equipment of the shield equipment, the debris in the soil bin 8 can be transported to the soil discharge equipment of the shield equipment by the spiral propulsion of the first screw conveyor 1 and the spiral propulsion of the second screw conveyor 2, and then the debris can be transported out of the tunnel by using the soil discharge equipment.

[0032] Moreover, when the gushing parameter of the second screw conveyor 2 is greater than a preset value, the control device controls the rotation speed of the second screw conveyor 2 to be lower than the rotation speed of the first screw conveyor 1, so that the debris in the first screw conveyor 1 is pushed forward faster, while the debris in the second screw conveyor 2 is pushed forward slower, thereby utilizing the speed difference to gather the debris between the first screw conveyor 1 and the second screw conveyor 2, thereby forming a soil plug, and then utilizing the soil plug to effectively prevent the occurrence of gushing.

[0033] It should be noted that the speed control between the first screw conveyor 1 and the second screw conveyor 2 is used to achieve the difference in the speed of the slag advancement, so that the amount of slag at the discharge end of the first screw conveyor 1 is greater than the amount of slag at the discharge end of the second screw conveyor 2, thereby achieving the accumulation of slag between the first screw conveyor 1 and the second screw conveyor 2 and forming a soil plug. Therefore, the use of soil plugs to prevent gushing not only ensures a good environment at the construction site, but also saves the operation time of slag cleaning, thereby ensuring a high tunnel construction efficiency. At the same time, the use of the first screw conveyor 1 and the second screw conveyor 2 can effectively control the actual amount of soil discharged, so that it is easy to establish a real earth pressure balance during the shield advancement process, thereby ensuring the safe construction of the tunnel.

[0034] The first screw conveyor 1 and the second screw conveyor 2 are both screw conveyors with independent drive systems. The specific types of the first screw conveyor 1 and the second screw conveyor 2 can be set according to actual needs and are not limited thereto. The first screw conveyor 1 and the second screw conveyor 2 respectively propel the soil material in the direction from the feed end to the discharge end, and the discharge end of the first screw conveyor 1 and the discharge end of the second screw conveyor 2 can be provided with a rear gate to realize the switch control of the discharge end by using the rear gate.

[0035] The shield equipment can be an earth pressure balance shield machine. During the excavation process of the shield equipment, the soil at the head of the machine is cut by the cutter head 9 and then pushed into the soil bin 8. The soil in the soil bin 8 is transported to the outside of the tunnel by the first screw conveyor 1 and the second screw conveyor 2 and other soil discharge equipment (such as a belt conveyor), thereby completing the soil discharge operation.

[0036] The control device is used to control the rotational speed of the first screw conveyor 1 and the rotational speed of the second screw conveyor 2 according to the gushing parameters of the second screw conveyor 2. Specifically, when the gushing parameters of the second screw conveyor 2 are not greater than the preset value, the control device controls the rotational speed of the first screw conveyor 1 to be the same as the rotational speed of the second screw conveyor 2. When the gushing parameters of the second screw conveyor 2 are greater than the preset value, the control device controls the rotational speed of the first screw conveyor 1 to be greater than the rotational speed of the second screw conveyor 2. The specific type of the control device can be set according to actual needs and is not limited to this. For example, the control device can be a controller, a micro-control unit, etc.

[0037] The gushing parameters are parameters used to characterize the gushing phenomenon. The specific types of the gushing parameters can be set according to actual needs and are not limited to this. For example, the gushing parameters may include: the pressure of the soil bin 8, using a soil pressure sensor to detect the soil pressure in the soil bin 8, and the control device is used to control the rotation speed of the second screw conveyor 2 to be less than the rotation speed of the first screw conveyor 1 when the pressure of the soil bin 8 is greater than a preset pressure value; the gushing parameters may include: the moisture content of the soil bin 8, using a moisture content sensor to detect the soil moisture content in the soil bin 8, and the control device is used to control the rotation speed of the second screw conveyor 2 to be less than the rotation speed of the first screw conveyor 1 when the moisture content of the soil bin 8 is greater than a preset moisture content value; the gushing parameters may include: the soil flow rate, using a flow rate sensor to detect the flow rate of the first screw conveyor 1 and the soil flow rate in the second screw conveyor 2, the control device is used to control the rotation speed of the second screw conveyor 2 to be lower than the rotation speed of the first screw conveyor 1 when the soil flow rate is greater than the preset flow rate value; the gushing parameters may include: soil flow rate, using a flow sensor to detect the soil flow rate in the first screw conveyor 1 and the second screw conveyor 2, the control device is used to control the rotation speed of the second screw conveyor 2 to be lower than the rotation speed of the first screw conveyor 1 when the soil flow rate is greater than the preset flow rate value; the gushing parameters may include: soil density, using a density sensor to detect the soil density in the first screw conveyor 1 and the second screw conveyor 2, the control device is used to control the rotation speed of the second screw conveyor 2 to be lower than the rotation speed of the first screw conveyor 1 when the soil density is greater than the preset density value.

[0038] like Figure 1 As shown, in some embodiments, the conveying system also includes: a spherical bearing 3, which is arranged between the feed end of the second screw conveyor 2 and the discharge end of the first screw conveyor 1, and one end of the spherical bearing 3 is connected to the discharge end of the first screw conveyor 1, and the other end of the spherical bearing 3 is connected to the feed end of the second screw conveyor 2.

[0039] It can be understood that since the spherical bearing 3 is arranged between the feed end of the second screw conveyor 2 and the discharge end of the first screw conveyor 1, and one end of the spherical bearing 3 is connected to the discharge end of the first screw conveyor 1, and the other end of the spherical bearing 3 is connected to the feed end of the second screw conveyor 2, the spherical bearing 3 can be used to conduct the feed end of the second screw conveyor 2 and the discharge end of the first screw conveyor 1, and can also be adjusted to multiple angles, which is beneficial to the turning, uphill and downhill of the shield equipment during the construction process.

[0040] It should be noted that the spherical joint bearing 3 is used for the spherical hinge between the feed end of the second screw conveyor 2 and the discharge end of the first screw conveyor 1 to realize the free adjustment of the angle between the second screw conveyor 2 and the first screw conveyor 1. The specific type of the spherical joint bearing 3 can be set according to actual needs and is not limited to this. By way of example, the spherical joint bearing 3 includes: an outer ring and an inner ring, the outer ring is movably sleeved on the inner ring, and the inner ring is connected to the discharge end of the first screw conveyor 1, and the outer ring is connected to the feed end of the second screw conveyor 2.

[0041] like Figure 2 As shown, in some embodiments, the conveying system further includes: a pressure regulating device 4, which includes: a mud and water station 41, a slurry feed pump 42 and a slurry discharge pump 43, the feed end of the slurry feed pump 42 is connected to the discharge end of the mud and water station 41, and the discharge end of the slurry feed pump 42 is connected to the feed end of the soil bin 8, the feed end of the slurry discharge pump 43 is connected to the second discharge end of the soil bin 8, and the discharge end of the slurry discharge pump 43 is connected to the feed end of the mud and water station 41. Among them, the output end of the control device is connected to the input end of the slurry feed pump 42 and the input end of the slurry discharge pump 43 respectively, and the control device is used to control the rotation speed of the slurry feed pump 42 and / or the rotation speed of the slurry discharge pump 43, so that the pressure of the soil bin 8 is within a preset pressure range.

[0042] It can be understood that, since the feed end of the slurry feed pump 42 is connected to the discharge end of the mud water station 41, and the discharge end of the slurry feed pump 42 is connected to the feed end of the soil bin 8, the mud treated in the mud water station 41 can be pressurized and transported to the soil bin 8 by the slurry feed pump 42, and since the feed end of the slurry discharge pump 43 is connected to the second discharge end of the soil bin 8, and the discharge end of the slurry discharge pump 43 is connected to the feed end of the mud water station 41, the mud in the soil bin 8 can be pressurized and transported to the mud water station 41 by the slurry discharge pump 43 for treatment. Therefore, through the cooperation of the slurry feed pump 42 and the slurry discharge pump 43, the circulation of mud between the soil bin 8 and the mud water station 41 can be realized, thereby meeting the construction requirements of the shield equipment.

[0043] At the same time, since the output end of the control device is connected to the input end of the slurry feed pump 42 and the input end of the slurry discharge pump 43 respectively, the control device can control the speed of the slurry feed pump 42 and / or the speed of the slurry discharge pump 43, thereby adjusting the pressure of the soil bin 8 by controlling the speed of the slurry feed pump 42 and / or the speed of the slurry discharge pump 43, and then making the pressure of the soil bin 8 within the preset pressure range. Therefore, the safe construction of the shield equipment is guaranteed by controlling the pressure.

[0044] It should be noted that the mud and water station 41 is used to process the mud discharged from the soil bin 8, and return the processed mud to the soil bin 8 for continued use. The specific type of the mud and water station 41 can be set according to actual needs and is not limited to this.

[0045] The slurry feed pump 42 is used to pressurize the treated slurry in the mud and water station 41 and transport it to the soil bin 8, and to adjust the pressure of the soil bin 8 under the control of the control device. The specific type of the slurry feed pump 42 can be set according to actual needs and is not limited to this.

[0046] The slurry discharge pump 43 is used to pressurize the slurry in the soil bin 8 and transport it to the mud water station 41, and to adjust the pressure of the soil bin 8 under the control of the control device. The specific type of the slurry discharge pump 43 can be set according to actual needs and is not limited to this.

[0047] like Figure 2 As shown, in some embodiments, the conveying system further includes: a density regulating device 5, the density regulating device 5 includes: a first valve 51 and a second valve 52, the first valve 51 is arranged between the discharge end of the first screw conveyor 1 and the discharge end of the slurry feed pump 42, and the second valve 52 is arranged between the discharge end of the first screw conveyor 1 and the feed end of the slurry discharge pump 43. Among them, the output end of the control device is connected to the input end of the first valve 51 and the input end of the second valve 52 respectively, and the control device is used to control the opening and closing of the first valve 51 and the second valve 52 to adjust the density of the slag at the discharge end of the first screw conveyor 1.

[0048] It can be understood that since the first valve 51 is arranged between the discharge end of the first screw conveyor 1 and the discharge end of the slurry feed pump 42, the first valve 51 can control the on-off of the passage between the discharge end of the first screw conveyor 1 and the discharge end of the slurry feed pump 42, and since the second valve 52 is arranged between the discharge end of the first screw conveyor 1 and the feed end of the slurry discharge pump 43, the second valve 52 can control the on-off of the passage between the discharge end of the first screw conveyor 1 and the discharge end of the slurry discharge pump 43.

[0049] At the same time, since the output end of the control device is connected to the input end of the first valve 51 and the input end of the second valve 52 respectively, the control device can control the on and off of the first valve 51 and the second valve 52.

[0050] Among them, when the first valve 51 and the second valve 52 are closed, the mud pressurized and transported by the slurry feed pump 42 is all transported to the soil bin 8, and the mud at the feeding end of the slurry discharge pump 43 all comes from the soil bin 8; when the first valve 51 and the second valve 52 are turned on, part of the mud pressurized and transported by the slurry feed pump 42 enters the discharge end of the first screw conveyor 1 and is mixed with the soil material in the discharge end of the first screw conveyor 1, and the mixed mud enters the mud and water station 41 for treatment under the pressurized transport of the slurry discharge pump 43, thereby forming a small circulation at the discharge end of the first screw conveyor 1 using part of the mud treated by the mud and water station 41, thereby utilizing the small circulation to adjust the density of the slag at the discharge end of the first screw conveyor 1, thereby meeting different slag transportation needs.

[0051] It should be noted that the first valve 51 is used to control the on-off of the passage between the discharge end of the first screw conveyor 1 and the discharge end of the slurry feed pump 42. The specific type of the first valve 51 can be set according to actual needs and is not limited to this.

[0052] The second valve 52 is used to control the on-off of the passage between the discharge end of the first screw conveyor 1 and the discharge end of the slurry discharge pump 43. The specific type of the second valve 52 can be set according to actual needs and is not limited to this.

[0053] When a small cycle is implemented, the first valve 51 and the second valve 52 are turned on synchronously. In addition, when other functions are required, the first valve 51 and the second valve 52 can also be turned on and off separately.

[0054] like Figure 2 As shown, in some embodiments, the pressure regulating device 4 also includes: a third valve 44 and a fourth valve 45, the third valve 44 and the fourth valve 45 are respectively arranged between the discharge end of the slurry feed pump 42 and the feed end of the slurry discharge pump 43, and the third valve 44 is arranged on the shield equipment, and the fourth valve 45 is arranged away from the shield equipment.

[0055] It can be understood that, since the third valve 44 and the fourth valve 45 are respectively arranged between the discharge end of the slurry feed pump 42 and the feed end of the slurry discharge pump 43, the third valve 44 and the fourth valve 45 can respectively control the on-off of the passage between the discharge end of the slurry feed pump 42 and the feed end of the slurry discharge pump 43. Therefore, when the third valve 44 and the fourth valve 45 are both closed, the mud pumped by the slurry feed pump 42 with increased pressure is all delivered to the soil bin 8, and the mud at the feed end of the slurry discharge pump 43 is all from the soil bin 8; when the third valve 44 and / or the fourth valve 45 are turned on, the mud pumped by the slurry feed pump 42 with increased pressure is directly delivered to the slurry discharge pump 43, and cooperates with the slurry discharge pump 43 to return to the mud and water station 41. Therefore, by using the conduction of the third valve 44 and / or the fourth valve 45, the direct confluence of the slurry feed to the slurry discharge is realized, so as to meet the requirements of the operation conditions such as the start-up, shutdown, and emergency of the shield equipment.

[0056] It should be noted that the third valve 44 is arranged on the shield equipment and serves as an internal bypass valve for controlling the on-off of the passage between the discharge end of the slurry pump 42 and the feed end of the slurry discharge pump 43. The specific type of the third valve 44 can be set according to actual needs and is not limited to this.

[0057] The fourth valve 45 is set away from the shield equipment and serves as an external bypass valve to control the on-off of the passage between the discharge end of the slurry pump 42 and the feed end of the slurry discharge pump 43. The specific type of the fourth valve 45 can be set according to actual needs and is not limited to this.

[0058] like Figure 3As shown, in some embodiments, the conveying system further includes: a flushing device 6, the flushing device 6 includes: a foam box 61 and a plurality of foam pumps 62, the feed end of the foam pump 62 is connected to the discharge end of the foam box 61, and the discharge end of the foam pump 62 is connected to the front flushing end of the cutter head 9 in the shield equipment. Among them, the output end of the control device is connected to the input end of the foam pump 62, and the control device is used to control the foam pump 62 to start when the soil pressure mode is on.

[0059] It can be understood that since the feed end of the foam pump 62 is connected to the discharge end of the foam box 61, and the discharge end of the foam pump 62 is connected to the back flushing end of the cutter disc 9 in the shield equipment, the output end of the control device is connected to the input end of the foam pump 62, so that when the earth pressure mode is in progress, the control device can control the foam pump 62 to turn on, thereby utilizing the foam pump 62 to pressurize the foam in the foam box 61 and transport it to the front of the cutter disc 9, and then utilize the foam sprayed on the front of the cutter disc 9 to reduce tool wear and improve excavation efficiency.

[0060] It should be noted that the foam box 61 is used to store foam, and the specific type of the foam box 61 can be set according to actual needs and is not limited to this.

[0061] The foam pump 62 is used to pressurize the foam in the foam box 61 and deliver it to the front of the cutter disc 9. The specific type of the foam pump 62 can be set according to actual needs and is not limited to this.

[0062] like Figure 3 As shown, in some embodiments, the flushing device 6 further includes: a flushing pump 63 and a plurality of three-way valves 64, the feed end of the flushing pump 63 is connected to the discharge end of the mud and water station 41, and the discharge end of the flushing pump 63 is respectively connected to the feed end of the foam pump 62 and the flushing end of the second discharge end of the soil bin 8, the feed end of the three-way valve 64 is connected to the discharge end of the foam pump 62, the first discharge end of the three-way valve 64 is connected to the front flushing end of the cutter disc 9, and the second feed end of the three-way valve 64 is connected to the back flushing end of the cutter disc 9. Among them, the output end of the control device is respectively connected to the input end of the flushing pump 63 and the input end of the three-way valve 64, and the control device is used to control the foam pump 62 to open when in the soil pressure mode, and control the feed end and the first discharge end of the three-way valve 64 to be connected, and, when in the mud and water mode, control the flushing pump 63 and the foam pump 62 to open, and control the feed end and the second discharge end of the three-way valve 64 to be connected.

[0063] It can be understood that since the feed end of the three-way valve 64 is connected to the discharge end of the foam pump 62, and the first discharge end of the three-way valve 64 is connected to the front flushing end of the cutter disc 9, and the second feed end of the three-way valve 64 is connected to the back flushing end of the cutter disc 9, when the feed end and the first discharge end of the three-way valve 64 are connected, the conduction of the passage between the discharge end of the foam pump 62 and the front flushing end of the cutter disc 9 can be achieved, and when the feed end and the second discharge end of the three-way valve 64 are connected, the conduction of the passage between the discharge end of the foam pump 62 and the back flushing end of the cutter disc 9 can be achieved.

[0064] Since the feed end of the flushing pump 63 is connected to the discharge end of the mud and water station 41, and the discharge end of the flushing pump 63 is connected to the feed end of the foam pump 62, the treated mud in the mud and water station 41 can be transported to the feed end of the three-way valve 64 by the cooperation of the flushing pump 63 and the foam pump 62, and since the output end of the control device is respectively connected to the input end of the flushing pump 63 and the input end of the three-way valve 64, the control device can control the switch of the flushing pump 63 and the passage switching of the three-way valve 64.

[0065] Therefore, when in the earth pressure mode, the control device controls the foam pump 62 to open, and controls the feed end and the first discharge end of the three-way valve 64 to be connected, so that the foam in the foam box 61 passes through the foam pump 62 and the three-way valve 64 in turn to reach the front flushing end of the cutter disc 9, thereby achieving lubrication of the front side of the cutter disc 9; when in the mud and water mode, the control device controls the flushing pump 63 and the foam pump 62 to open, and controls the feed end and the second discharge end of the three-way valve 64 to be connected, so that the treated mud in the mud and water station 41 passes through the flushing pump 63, the foam pump 62 and the three-way valve 64 in turn to reach the back flushing end of the cutter disc 9, thereby achieving flushing of the back side of the cutter disc 9.

[0066] Among them, through the cooperation of the three-way valve 64, the foam pump 62 and the flushing pump 63, the switching between the front lubrication of the cutter disc 9 and the back flushing of the cutter disc 9 is realized, thereby meeting the different needs of shield construction with fewer pipelines, pump bodies and other components.

[0067] At the same time, since the feed end of the flushing pump 63 is connected to the discharge end of the mud and water station 41, and the discharge end of the flushing pump 63 is connected to the flushing end of the second discharge end of the soil bin 8, the mud treated in the mud and water station 41 can be pressurized and transported to the flushing end of the second discharge end of the soil bin 8 by the flushing pump 63, thereby realizing the flushing of the second discharge end of the soil bin 8 and ensuring smooth discharge of the soil bin 8.

[0068] It should be noted that the flushing pump 63 is used to pressurize the treated mud in the mud and water station 41 and transport it to the back of the cutter disc 9, and to pressurize the treated mud in the mud and water station 41 and transport it to the second discharge end of the soil bin 8. The specific type of the flushing pump 63 can be set according to actual needs and is not limited to this.

[0069] The three-way valve 64 is used to switch between the two working conditions of front lubrication of the cutter disc 9 and back flushing of the cutter disc 9. The specific type of the three-way valve 64 can be set according to actual needs and is not limited to this.

[0070] The number of foam pumps 62 corresponds to the number of three-way valves 64. The specific number can be set according to actual needs and is not limited. Preferably, the number of foam pumps 62 and three-way valves 64 can be six, and the discharge ends of the six foam pumps 62 and the feed ends of the six three-way valves 64 are connected by the central rotating body of the shield equipment.

[0071] For the switching control of each working condition, the control device can also be implemented in conjunction with various valve bodies additionally arranged on each pipeline, which will not be elaborated herein.

[0072] The soil pressure mode is to balance the water and soil pressure of the excavation surface by the soil pressure in the soil bin 8, and the mud water mode is to balance the water and soil pressure of the excavation surface by inputting mud into the soil bin 8.

[0073] like Figure 1 and Figure 4 As shown, in some embodiments, the pressure regulating device 4 further includes: a first slurry inlet pipe 46 and a second slurry inlet pipe 47, the first slurry inlet pipe 46 and the second slurry inlet pipe 47 are arranged between the discharge end of the slurry inlet pump 42 and the feed end of the soil bin 8, and the feed end of the first slurry inlet pipe 46 is connected to the discharge end of the slurry inlet pump 42, and the discharge end of the second slurry inlet pipe 47 is connected to the feed end of the soil bin 8; the conveying system further includes: a pipe changing device 7, the pipe changing device 7 includes: a pipe changing frame 71, a slide seat 72, a winding disk 73, a slurry inlet hose 74 and a driving mechanism 75, The pipe changing rack 71 is arranged away from the shield equipment, and the slide 72 is slidably arranged on the pipe changing rack 71 along the shield direction, the winding disk 73 is rotatably arranged on the slide 72, the feed end of the slurry feed hose 74 is connected to the discharge end of the first slurry feed pipe 46, the discharge end of the slurry feed hose 74 bypasses the winding disk 73 and is connected to the feed end of the second slurry feed pipe 47, the driving mechanism 75 is arranged on the pipe changing rack 71, the driving end of the driving mechanism 75 is connected to the slide 72, and the driving mechanism 75 is used to drive the slide 72 to move to the end of the pipe changing rack 71 away from the shield equipment.

[0074] It can be understood that, since the feed end of the slurry inlet hose 74 is connected to the discharge end of the first slurry inlet pipe 46, and the discharge end of the slurry inlet hose 74 is connected to the feed end of the second slurry inlet pipe 47, the discharge end of the first slurry inlet pipe 46 and the feed end of the second slurry inlet pipe 47 can be connected by the slurry inlet hose 74. Furthermore, since the feed end of the first slurry inlet pipe 46 is connected to the discharge end of the slurry inlet pump 42, and the discharge end of the second slurry inlet pipe 47 is connected to the feed end of the soil bin 8, the discharge end of the slurry inlet pump 42 and the feed end of the soil bin 8 can be connected by the cooperation of the first slurry inlet pipe 46, the slurry inlet hose 74 and the second slurry inlet pipe 47. As a result, the mud treated in the mud and water station 41 can be transported into the soil bin 8 by the boosting of the slurry inlet pump 42 and the first slurry inlet pipe 46, the slurry inlet hose 74 and the second slurry inlet pipe 47, thereby meeting the needs of shield construction.

[0075] At the same time, since the slide 72 is slidably set on the pipe changing rack 71 along the direction of the shield, and the winding disk 73 is rotatably set on the slide 72, the discharge end of the slurry feed hose 74 bypasses the winding disk 73 and is connected to the feed end of the second slurry feed pipe 47. When the shield equipment is excavating, the slurry feed hose 74 can realize the conduction between the first slurry feed pipe 46 and the second slurry feed pipe 47, and at the same time, it can also utilize the rotation of the winding disk 73 and the sliding of the slide 72 to realize the synchronous movement of the second slurry feed pipe 47 with the shield equipment. Therefore, when the slide 72 moves to the end of the pipe changing rack 71 close to the shield equipment (extreme position) and the second slurry inlet pipe 47 is extended after the pipe is changed, since the driving end of the driving mechanism 75 is connected to the slide 72, the slide 72 can be reset to the end of the pipe changing rack 71 away from the shield equipment (initial position) under the drive of the driving mechanism 75, so that the excavation operation can continue. At the same time, the pipe changing device 7 composed of the pipe changing rack 71, the slide 72, the winding disk 73, the slurry inlet hose 74 and the driving mechanism 75 has a simple structure and occupies less space, which makes it easy to arrange it on the same side as the belt conveyor in a narrow tunnel space, thereby meeting the needs of efficient construction.

[0076] It should be noted that the first slurry inlet pipe 46, the second slurry inlet pipe 47 and the slurry inlet hose 74 are used to connect the discharge end of the slurry inlet pump 42 and the feed end of the soil bin 8, so that the mud treated in the mud and water station 41 can be transported to the soil bin 8 by the slurry inlet pump 42. The specific types of the first slurry inlet pipe 46, the second slurry inlet pipe 47 and the slurry inlet hose 74 can be set according to actual needs and are not limited to this. For example, the first slurry inlet pipe 46 and the second slurry inlet pipe 47 are respectively arranged along the length direction of the tunnel (shield direction), and the slurry inlet hose 74 is a hose structure, which bypasses the winding drum 73 away from the side of the shield equipment and is connected between the first slurry inlet pipe 46 and the second slurry inlet pipe 47.

[0077] The tube changing rack 71 is used to carry the slide 72, the winding disk 73 and the driving mechanism 75. The specific type of the tube changing rack 71 can be set according to actual needs and is not limited to this. For example, the tube changing rack 71 includes: multiple connected horizontal beams, multiple longitudinal beams and multiple vertical beams. Furthermore, the tube changing rack 71 can also include: multiple oblique beams, which are arranged between the multiple connected horizontal beams, multiple longitudinal beams and multiple vertical beams.

[0078] The slide 72 is used to carry the winding drum 73 and to move the winding drum 73 by driving the driving mechanism 75. The specific type of the slide 72 can be set according to actual needs and is not limited to this. For example, the slide 72 can be a U-shaped frame. The slide 72 is slidably set on the pipe changing rack 71 by using multiple rollers. The winding drum 73 is rotatably set on one end of the slide 72 close to the shield equipment, and the other end of the slide 72 forms a limiting effect on the hose wound on the winding drum 73.

[0079] The winding drum 73 is used for winding the slurry inlet hose 74. When the shield equipment drives the second slurry inlet pipe 47 to move, the second slurry inlet pipe 47 drives the discharge end of the slurry inlet hose 74 to move synchronously. As a result, under the drag of the discharge end of the slurry inlet hose 74, the winding drum 73 moves in the direction close to the shield equipment until it reaches the limit position. The specific type of the winding drum 73 can be set according to actual needs and is not limited to this. For example, the winding drum 73 can be a disc-shaped structure, which is rotatably set on the slide seat 72 using a bearing.

[0080] The driving mechanism 75 is used to drive the slide 72 to move to the end of the pipe changing rack 71 away from the shield equipment. The specific type of the driving mechanism 75 can be set according to actual needs and is not limited to this. For example, the driving mechanism 75 can be a winch. When the shield equipment drives the second slurry inlet pipe 47 to move, the driving mechanism 75 can also apply a small constant force on the slide 72 away from the shield equipment to ensure the stable follow-up of the winding disk 73.

[0081] like Figure 1 and Figure 4 As shown, in some embodiments, the pressure regulating device 4 also includes: a first slurry row pipe 48 and a second slurry row pipe 49, the first slurry row pipe 48 and the second slurry row pipe 49 are arranged between the feed end of the slurry row pump 43 and the second discharge end of the soil bin 8, and the feed end of the first slurry row pipe 48 is connected to the second discharge end of the soil bin 8, and the discharge end of the second slurry row pipe 49 is connected to the feed end of the slurry row pump 43; the pipe changing device 7 also includes: a slurry row hose (not shown in the figure), the discharge end of the slurry row hose is connected to the feed end of the second slurry row pipe 49, and the feed end of the slurry row hose bypasses the winding disk 73 and is connected to the discharge end of the first slurry row pipe 48.

[0082] It can be understood that, since the discharge end of the slurry discharge hose is connected to the feed end of the second slurry discharge pipe 49, and the feed end of the slurry discharge hose is connected to the discharge end of the first slurry discharge pipe 48, the feed end of the second slurry discharge pipe 49 and the discharge end of the first slurry discharge pipe 48 can be connected by the slurry discharge hose. Furthermore, since the feed end of the first slurry discharge pipe 48 is connected to the second discharge end of the soil bin 8, and the discharge end of the second slurry discharge pipe 49 is connected to the feed end of the slurry discharge pump 43, the second discharge end of the soil bin 8 and the feed end of the slurry discharge pump 43 can be connected by the cooperation of the first slurry discharge pipe 48, the slurry discharge hose and the second slurry discharge pipe 49. As a result, the mud in the soil bin 8 can be transported to the mud and water station 41 for treatment by the pressurization of the slurry discharge pump 43 and the first slurry discharge pipe 48, the slurry discharge hose and the second slurry discharge pipe 49, thereby meeting the needs of shield construction.

[0083] At the same time, since the feed end of the slurry discharge hose bypasses the winding disk 73 and is connected to the discharge end of the first slurry discharge pipe 48, when the shield equipment is excavating, the slurry discharge hose can realize the conduction between the first slurry discharge pipe 48 and the second slurry discharge pipe 49, and can also realize the synchronous movement of the first slurry discharge pipe 48 with the shield equipment by utilizing the rotation of the winding disk 73 and the sliding of the slide 72. Therefore, when the slide 72 moves to the end of the pipe changing rack 71 close to the shield equipment (extreme position), and the first slurry discharge pipe 48 is extended after the pipe is changed, the slide 72 can be reset to the end of the pipe changing rack 71 away from the shield equipment (initial position) under the drive of the driving mechanism 75, so that the excavation operation can continue.

[0084] It should be noted that the first slurry discharge pipe 48, the second slurry discharge pipe 49 and the slurry discharge hose are used to connect the feed end of the slurry discharge pump 43 and the second discharge end of the soil bin 8, so that the slurry in the soil bin 8 can be transported to the mud water station 41 for treatment by the slurry discharge pump 43. The specific types of the first slurry discharge pipe 48, the second slurry discharge pipe 49 and the slurry discharge hose can be set according to actual needs and are not limited to this. For example, the first slurry discharge pipe 48 and the second slurry discharge pipe 49 are respectively arranged along the length direction of the tunnel (shield direction), and the slurry discharge hose is a hose structure, which bypasses the winding disk 73 away from the side of the shield equipment and is connected between the first slurry discharge pipe 48 and the second slurry discharge pipe 49.

[0085] Among them, when the slide 72 moves to the extreme position, the shield equipment stops excavating. At the same time, the operator adds an extension pipeline between the feed end of the second slurry feed pipe 47 and the discharge end of the slurry feed hose 74, and adds an extension pipeline between the discharge end of the first slurry discharge pipe 48 and the feed end of the slurry discharge hose. Thereafter, the drive mechanism 75 drives the slide 72 to return to the initial position, and the shield equipment continues to excavate, thereby continuously circulating to achieve pipe replacement and extension of the pipeline.

[0086] like Figure 4As shown, in some embodiments, the feed end of the slurry inlet hose 74 is located above the discharge end of the slurry inlet hose 74, and the feed end of the slurry discharge hose is located below the discharge end of the slurry discharge hose; the pipe changing device 7 also includes: a plurality of guide rollers 76, the guide rollers 76 are rotatably arranged on the pipe changing frame 71, and the plurality of guide rollers 76 are spaced apart along the shield direction, the discharge end of the slurry inlet hose 74 and the feed end of the slurry discharge hose respectively bypass the winding disk 73 and are arranged on the guide rollers 76.

[0087] It can be understood that, since the feed end of the slurry inlet hose 74 is located above the discharge end of the slurry inlet hose 74, and the feed end of the discharge hose is located below the discharge end of the discharge hose, the discharge end of the slurry inlet hose 74 and the feed end of the second slurry inlet pipe 47 are both located below the feed end of the slurry inlet hose 74 and the discharge end of the first slurry inlet pipe 46, and the feed end of the discharge hose and the discharge end of the first discharge pipe 48 are both located below the discharge end of the discharge hose and the feed end of the second discharge pipe 49. At the same time, due to the guide roller 76 It is rotatably arranged on the pipe changing rack 71, and the discharge end of the slurry inlet hose 74 and the feed end of the slurry discharge hose are respectively bypassed by the winding disk 73 and arranged on the guide roller 76, so that the discharge end of the slurry inlet hose 74 and the feed end of the second slurry inlet pipe 47 located below and the feed end of the slurry discharge hose and the discharge end of the first slurry discharge pipe 48 located below can all be guided and moved by means of multiple guide rollers 76, thereby reducing the wear of the slurry inlet hose 74, the second slurry inlet pipe 47 and the first slurry discharge pipe 48 and extending the service life of each component.

[0088] It should be noted that the guide roller 76 is used for supporting and guiding the discharge end of the slurry inlet hose 74 and the feed end of the second slurry inlet pipe 47, as well as the feed end of the slurry discharge hose and the discharge end of the first slurry discharge pipe 48. The specific type of the guide roller 76 can be set according to actual needs and is not limited to this. For example, the two ends of the guide roller 76 are respectively arranged at the bottom of the pipe changing rack 71 through bearing seats, and the axial direction of the guide roller 76 is located in the width direction of the tunnel.

[0089] In the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, the meaning of "plurality" is two or more.

[0090] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0092] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A shield slag conveying system, characterized in that: include: A first screw conveyor, wherein a feeding end of the first screw conveyor is connected to a first discharging end of a soil bin of the shield equipment; A second screw conveyor, wherein a feed end of the second screw conveyor is connected to a discharge end of the first screw conveyor, and the discharge end of the second screw conveyor is connected to a feed end of a soil discharge device of the shield device; A control device, wherein the output end of the control device is respectively connected to the input end of the first screw conveyor and the input end of the second screw conveyor, and the control device is used for controlling the rotation speed of the second screw conveyor to be lower than the rotation speed of the first screw conveyor when the gushing parameter of the second screw conveyor is greater than a preset value, so as to form a soil plug between the first screw conveyor and the second screw conveyor.

2. The shield slag conveying system according to claim 1, characterized in that: The delivery system further comprises: A spherical bearing is arranged between the feed end of the second screw conveyor and the discharge end of the first screw conveyor, and one end of the spherical bearing is connected to the discharge end of the first screw conveyor, and the other end of the spherical bearing is connected to the feed end of the second screw conveyor.

3. The shield slag conveying system according to claim 1, characterized in that: The delivery system further comprises: A pressure regulating device, the pressure regulating device comprising: a mud water station, a slurry feed pump and a slurry discharge pump, the feed end of the slurry feed pump is connected to the discharge end of the mud water station, and the discharge end of the slurry feed pump is connected to the feed end of the soil bin, the feed end of the slurry discharge pump is connected to the second discharge end of the soil bin, and the discharge end of the slurry discharge pump is connected to the feed end of the mud water station; Among them, the output end of the control device is respectively connected to the input end of the slurry feed pump and the input end of the slurry discharge pump, and the control device is used to control the rotation speed of the slurry feed pump and / or the rotation speed of the slurry discharge pump so that the pressure of the soil bin is within a preset pressure range.

4. The shield slag conveying system according to claim 3 is characterized in that: The delivery system further comprises: A density regulating device, the density regulating device comprising: a first valve and a second valve, the first valve being arranged between the discharge end of the first screw conveyor and the discharge end of the slurry feed pump, and the second valve being arranged between the discharge end of the first screw conveyor and the feed end of the slurry discharge pump; The output end of the control device is connected to the input end of the first valve and the input end of the second valve respectively, and the control device is used to control the on and off of the first valve and the second valve to adjust the density of the slag at the discharge end of the first screw conveyor.

5. The shield slag conveying system according to claim 3, characterized in that: The pressure regulating device also includes: The third valve and the fourth valve are respectively arranged between the discharge end of the slurry feed pump and the feed end of the slurry discharge pump, and the third valve is arranged on the shield equipment, and the fourth valve is arranged away from the shield equipment.

6. The shield slag conveying system according to claim 3, characterized in that: The delivery system further comprises: A flushing device, the flushing device comprising: a foam box and a plurality of foam pumps, wherein a feed end of the foam pump is connected to a discharge end of the foam box, and a discharge end of the foam pump is connected to a front flushing end of a cutterhead in the shield equipment; The output end of the control device is connected to the input end of the foam pump, and the control device is used to control the foam pump to start when in soil pressure mode.

7. The shield slag conveying system according to claim 6, characterized in that: The flushing device also includes: A flushing pump and a plurality of three-way valves, wherein the feed end of the flushing pump is connected to the discharge end of the mud and water station, and the discharge end of the flushing pump is respectively connected to the feed end of the foam pump and the flushing end of the second discharge end of the soil bin, the feed end of the three-way valve is connected to the discharge end of the foam pump, the first discharge end of the three-way valve is connected to the front flushing end of the cutter disc, and the second feed end of the three-way valve is connected to the back flushing end of the cutter disc; Among them, the output end of the control device is respectively connected to the input end of the flushing pump and the input end of the three-way valve, and the control device is used to control the foam pump to start when in soil pressure mode, and control the feed end and the first discharge end of the three-way valve to be connected, and, when in mud and water mode, control the flushing pump and the foam pump to start, and control the feed end and the second discharge end of the three-way valve to be connected.

8. The shield slag conveying system according to claim 3, characterized in that: The pressure regulating device further includes: a first slurry inlet pipe and a second slurry inlet pipe, wherein the first slurry inlet pipe and the second slurry inlet pipe are arranged between the discharge end of the slurry inlet pump and the feed end of the soil bin, and the feed end of the first slurry inlet pipe is connected to the discharge end of the slurry inlet pump, and the discharge end of the second slurry inlet pipe is connected to the feed end of the soil bin; The conveying system also includes: a pipe changing device, which includes: a pipe changing rack, a slide, a winding disk, a slurry feed hose and a driving mechanism. The pipe changing rack is arranged away from the shield equipment, and the slide is slidably arranged on the pipe changing rack along the shield direction, the winding disk is rotatably arranged on the slide, the feed end of the slurry feed hose is connected to the discharge end of the first slurry feed pipe, the discharge end of the slurry feed hose bypasses the winding disk and is connected to the feed end of the second slurry feed pipe, the driving mechanism is arranged on the pipe changing rack, the driving end of the driving mechanism is connected to the slide, and the driving mechanism is used to drive the slide to move to the end of the pipe changing rack away from the shield equipment.

9. The shield slag conveying system according to claim 8, characterized in that: The pressure regulating device further includes: a first slurry row pipe and a second slurry row pipe, wherein the first slurry row pipe and the second slurry row pipe are arranged between the feed end of the slurry discharge pump and the second discharge end of the soil bin, and the feed end of the first slurry row pipe is connected to the second discharge end of the soil bin, and the discharge end of the second slurry row pipe is connected to the feed end of the slurry discharge pump; The pipe replacement device also includes: a slurry discharge hose, the discharge end of which is connected to the feed end of the second slurry discharge pipe, and the feed end of which bypasses the winding disk and is connected to the discharge end of the first slurry discharge pipe.

10. The shield slag conveying system according to claim 8, characterized in that: The feed end of the slurry inlet hose is located above the discharge end of the slurry inlet hose, and the feed end of the slurry discharge hose is located below the discharge end of the slurry discharge hose; The pipe changing device also includes: a plurality of guide rollers, which are rotatably arranged on the pipe changing frame and are spaced apart along the shield direction; the discharge end of the slurry inlet hose and the feed end of the slurry discharge hose respectively bypass the winding disk and are arranged on the guide rollers.

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