Shield tunneling machine screw conveyor gushing pressure relief device

Abstract

The invention discloses a spewing pressure relief device for a spiral conveyor of a shield tunneling machine, and relates to the technical field of shield tunneling equipment. Comprising a pressure release valve which can be conducted under a set pressure and is connected to a slag outlet of the spiral conveyor in a working state; the separation container is connected to the outlet end of the pressure release valve; the circulating separation mechanism is mounted in the separation container and can be used for circularly separating out gravels mingled in the materials in the separation container and outputting the gravels; and the collecting container is used for collecting the slurry separated by the circulating separation mechanism and is matched with a slurry pump. According to the device, gravels doped in slurry sprayed by the spiral conveyor of the shield tunneling machine can be separated, and the slurry is conveyed to the slurry treatment mechanism, so that the slurry is prevented from being discharged into a tunnel, the construction safety is ensured, the tunneling deslagging efficiency of the shield tunneling machine is improved, and the construction cost and the construction risk are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of shield equipment, and in particular to a shield machine screw conveyor surge pressure relief device. Background Art

[0002] During shield construction, screw conveyors are responsible for discharging excavated soil from the excavation chamber. However, in areas with well-developed groundwater systems and lava formations with high water content, "gushing" is prone to occur, causing a sudden splash of mud-water mixture from the screw conveyor's discharge port. This presents the following construction challenges: a single gushing event produces more than eight cubic meters of mud, far exceeding the capacity for manual cleanup; the gushing mud, discharged directly into the tunnel, has a solids content of less than 15% and contains a mixture of coarse and fine particles, requiring additional dewatering equipment and manual cleanup, increasing overall costs by over 40%; the gushing mud, with a viscosity exceeding 5000 cp, accumulates within a height of less than 1.5 m at the bottom of the assembly machine, making it difficult for mechanical cleanup equipment to intervene; impacts the shield machine belt and belt frame, shortening the service life of related equipment; and the debris contains gravel, which easily splashes and threatens construction safety.

[0003] Therefore, it is necessary to provide a pressure relief device for use in shield screw conveyor gushing conditions to prevent the gushing mud from being directly discharged into the tunnel. Summary of the Invention

[0004] In response to the technical problem that the existing shield machine's screw conveyor directly discharges mud into the tunnel when it gushes, the present invention provides a shield machine screw conveyor gushes pressure relief device, which can separate gravel mixed in the mud gushing out of the shield machine's screw conveyor and send the mud to a mud treatment mechanism to avoid mud discharge in the tunnel and ensure construction safety, thereby improving the shield machine's excavation and slag discharge efficiency and reducing construction costs and risks.

[0005] The present invention is achieved through the following technical solutions: The present invention provides a shield machine screw conveyor gushing pressure relief device, comprising: a pressure relief valve, which can be conducted under a set pressure and is connected to the slag outlet of the screw conveyor in the working state; a separation container, which is connected to the outlet end of the pressure relief valve; a circulating separation mechanism, which is installed in the separation container and can circulate and separate gravel entrained in the material in the separation container and output the gravel; and a collecting container, which is used to collect mud separated by the circulating separation mechanism and is adapted to be equipped with a mud pump.

[0006] The shield machine screw conveyor gushing pressure relief device provided by the present invention includes a pressure relief valve, a separation container, a circulation separation mechanism and a collection container. The pressure relief valve is connected to the slag outlet of the screw conveyor in a working state and can be opened at a set pressure. When the pressure at the rear of the screw conveyor is greater than the set value, the pressure relief valve automatically gushes and relieves pressure, thereby maintaining the pressure balance of the soil bin; the separation container is connected to the outlet end of the pressure relief valve, and the circulation separation mechanism is installed in the separation container. As a result, the mud gushing out from the screw conveyor flows into the separation container to circulate and separate gravel mixed in the mud through the circulation separation mechanism and output the gravel. The output gravel is usually transported to the shield machine transmission belt through the slag chute for transportation, while the mud is collected by the collection container. The mud collected in the collection container is transported to a sewage treatment pool (usually a sedimentation tank) through a mud pump and a corresponding conveying pipeline, so that the mud is sent to the mud treatment mechanism to avoid mud discharge in the tunnel and ensure construction safety, thereby improving the shield machine excavation and slag discharge efficiency and reducing construction costs and construction risks.

[0007] Among them, the mud has a high viscosity. If a static screening element or a vibrating screen is used to screen out the gravel in the mud, it is easy to cause the screening mechanism to be blocked, the screening element's flow capacity is too low to discharge the gushing mud in time, and the gravel accumulates on the screening element, and stable pressure relief cannot be ensured. The present invention uses a circulating separation mechanism to perform circulating separation, which can not only output the gravel in time, avoid gravel splashing and affecting the normal operation of the mud pump, but also enable the separation mechanism to be in a better working state, ensure that the separation mechanism has sufficient flow capacity, and discharge the gushing mud in time, avoid mud blockage and insufficient flow capacity, and thus enable the device to stably relieve the pressure on the shield machine screw conveyor.

[0008] In an optional embodiment of the present application, the circulating separation mechanism includes: a stretching roller group, installed in the separation container and located at the feed end of the separation container; a filter mesh belt, stretched on the stretching roller group, and separated into a separation section and a cleaning section by the stretching roller group, the separation section is used to filter out gravel in the mud and output the gravel to the separation container; a cleaning roller, installed in the separation container, capable of self-rotation, and located on the lower side of the cleaning section, for sweeping away the mud attached to the filter mesh belt; wherein the collecting container is an open funnel-shaped container, the collecting container is located in the space enclosed by the filter mesh belt, and the opening of the collecting container is located on the lower side of the separation section.

[0009] Therefore, the filter belt is driven to move in a circular motion by the tensioning roller group. On the one hand, the filter belt can filter the mud entering the separation container and transport gravel. On the other hand, the filter belt can be moved relative to the cleaning roller to sweep away the mud attached to the filter belt through the cleaning roller, so as to restore the mud flow capacity of the corresponding belt section of the filter belt, and send the cleaned filter belt to the feed section of the separation container, thereby ensuring that the filter belt has sufficient mud permeability while realizing circular separation.

[0010] In an optional embodiment of the present application, the tensioning roller group includes: a driving roller, installed at one end of the upper side of the separation container; a first driven roller, installed at the other end of the upper side of the separation container, and at least partially located outside the opening of the separation container; a second driven roller, installed in the separation container, and located below the collecting container, so that the collecting container can be installed in the space surrounded by the filter belt.

[0011] In an optional embodiment of the present application, a plurality of cleaning rollers are provided, and the plurality of cleaning rollers are spaced apart along the length direction of the cleaning section to ensure that the cleaning rollers can effectively sweep away the mud attached to the filter belt.

[0012] In an optional embodiment of the present application, the cleaning roller is a hollow brush roller, the brush body of the cleaning roller contacts the surface of the filter belt; the side wall of the cleaning roller is provided with multiple water spray holes, the water spray holes being arranged directly opposite the brush body; one end of the cleaning roller is provided with a water spray connector, the water spray connector is used to connect to a clean water source, and the water spray connector is rotatable relative to the cleaning roller. When the cleaning roller needs to be cleaned or the cleaning roller's cleaning efficiency is improved, clean water can be supplied to the cleaning roller, thereby rinsing the clean water roller and brushing the filter belt with clean water.

[0013] In an optional embodiment of the present application, the bottom of the separation container is funnel-shaped, and a sewage pump is installed at the bottom of the separation container to pump away the sewage collected at the bottom of the separation container.

[0014] In an optional embodiment of the present application, the filter mesh belt is a polyurethane-coated steel mesh belt to improve the anti-stickiness of the filter mesh belt and reduce the amount of mud attached to the filter mesh belt.

[0015] In an optional embodiment of the present application, a buffer container is further included, which is connected between the pressure relief valve and the separation container to buffer the gushing mud through the buffer container, reduce the impact of the mud on the circulation separation mechanism, improve the stability of the circulation separation mechanism and extend its service life.

[0016] In an optional embodiment of the present application, the buffer container is provided with: a feed pipe, connected to one side of the buffer container and communicated with the inner cavity of the buffer container; a discharge pipe, connected to the bottom of the buffer container, arranged on the same side as the feed pipe, and the lower end is connected to the feed end of the separation container; a damping shock absorber, one end of which is installed in the buffer container and is arranged opposite the discharge end of the feed pipe; a buffer plate, vertically installed on the other end of the damping shock absorber, the cross-section of which is adapted to the inner cavity cross-section of the buffer container and can move along the length direction of the buffer container; a guide plate, installed below the buffer plate, arranged downwardly inclined, one end extending to the mouth of the discharge pipe, and the other end extending to the outside of the side of the buffer plate away from the feed pipe, so as to ensure that the buffer container can effectively absorb the kinetic energy of the gushing mud, while reducing the impact of the gushing mud on the buffer container itself.

[0017] In an optional embodiment of the present application, the pressure relief valve is an electrically controlled gate valve, so as to facilitate automatic control of the pressure relief valve while ensuring that the pressure relief valve has sufficient flow capacity to ensure that the screw conveyor of the shield machine can be quickly depressurized.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The shield machine screw conveyor gushing pressure relief device provided by the present invention includes a pressure relief valve, a separation container, a circulation separation mechanism and a collection container. The pressure relief valve is connected to the slag outlet of the screw conveyor in the working state and can be conducted under a set pressure. When the pressure at the rear of the screw conveyor is greater than the set value, it will automatically perform gushing pressure relief, thereby maintaining the pressure balance of the soil bin.

[0019] 2. The shield machine screw conveyor gushing pressure relief device provided by the present invention has a separation container connected to the outlet end of the pressure relief valve, and a circulation separation mechanism is installed in the separation container, so that the mud gushing out by the screw conveyor flows into the separation container, so as to circulate and separate the gravel mixed in the mud through the circulation separation mechanism and output the gravel. The output gravel is usually transported to the shield machine transmission belt through the slag chute for transportation, and the mud is collected by the collection container. The mud collected in the collection container is transported to the sewage treatment pool through the mud pump and the corresponding conveying pipeline, so that the mud is sent to the mud treatment mechanism to avoid mud discharge in the tunnel and ensure construction safety, thereby improving the shield machine excavation and slag discharge efficiency and reducing construction costs and construction risks.

[0020] 3. The shield machine screw conveyor gushing pressure relief device provided by the present invention performs circulation separation through a circulation separation mechanism, which can not only output gravel in time to avoid gravel splashing and affecting the normal operation of the mud pump, but also enable the separation mechanism to be in a better working state, ensure that the separation mechanism has sufficient flow capacity, and discharge the gushing mud in time, avoiding mud blockage and insufficient flow capacity, so that the device can stably relieve the pressure of the shield machine screw conveyor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0022] In the attached figure: Figure 1 A schematic structural diagram of a shield machine screw conveyor surge relief device provided by an embodiment of the present invention; Figure 2 A schematic diagram of the assembly structure of the circulation separation mechanism provided in an embodiment of the present invention assembled in a separation container; Figure 3 A schematic structural diagram of the main body of the cleaning roller provided in an embodiment of the present invention; Figure 4 A schematic cross-sectional structural diagram of a buffer container provided in an embodiment of the present invention.

[0023] Markings and corresponding parts names in the accompanying drawings: 100-pressure relief valve; 200-separation container, 210-sewage pump; 300 - circulation separation mechanism, 310 - filter belt, 311 - separation section, 312 - cleaning section, 320 - cleaning roller, 321 - water spray hole, 322 - water spray joint, 331 - driving roller, 332 - first driven roller, 333 - second driven roller; 400-collection container, 410-mud pump; 500- buffer container, 510- feed pipe, 520- discharge pipe, 530- damping shock absorber, 540- buffer plate, 550- guide plate. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0025] In the description of the embodiments of the present application, the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the device of the application is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. These are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0026] In the description of this application, unless otherwise specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0027] It should be noted that the groundwater system is well-developed and the water content of the lava-developed strata is high, which makes it easy for "eruption" to occur, resulting in sudden splashing of mud-water mixture from the slag outlet of the screw conveyor. A single eruption event produces more than eight cubic meters of mud, far exceeding the capacity of manual cleaning. At the same time, if the gushing mud is discharged directly into the tunnel, the solid content is <15% and the coarse / fine particles are mixed, requiring additional dehydration equipment and manual cleaning, increasing the overall cost by more than 40%. In addition, the viscosity of the gushing mud is >5000cp, and it accumulates in the space <1.5m high at the bottom of the assembly machine, making it difficult for mechanical cleaning equipment to intervene. In addition, the gushing mud impacts the shield machine belt and belt frame, affecting the service life of related equipment. The slag contains gravel, which is prone to splashing and threatening construction safety.

[0028] One possible solution is to use polymer modifiers to improve the slag in the soil bin to prevent gushing. However, this construction method is difficult to implement in practice and the polymer materials are expensive. Another possible solution is to control gushing by alternating the use of the double gates at the slag outlet of the screw conveyor and transfer the slag to the conveyor belt through the double gates. However, this still causes impact on the shield machine belt and belt frame, affecting the service life of related equipment.

[0029] In this regard, the inventor has innovatively designed the following technical solution, and the specific implementation solution of this application will be described in detail with reference to the accompanying drawings.

[0030] Example Combine Figure 1 This embodiment provides a shield machine screw conveyor surge pressure relief device, including: a pressure relief valve 100, which can be opened at a set pressure and is connected to the slag outlet of the screw conveyor in the working state; a separation container 200, which is connected to the outlet end of the pressure relief valve 100; a circulation separation mechanism 300, which is installed in the separation container 200 and can circulate and separate gravel mixed in the material in the separation container 200 and output the gravel; a collection container 400, which is used to collect the mud separated by the circulation separation mechanism 300 and is suitable for being equipped with a mud pump 410.

[0031] Typically, the pressure relief valve 100 is an electrically controlled gate valve, which facilitates automatic control of the pressure relief valve 100 while ensuring sufficient flow capacity to quickly relieve pressure on the screw conveyor of the shield machine. During use, the pressure relief valve 100 is typically controlled by a PLC, and a pressure gauge is installed on the screw conveyor to monitor the pressure within the screw conveyor in real time. When the screw conveyor pressure reaches a set value, the PLC controls the pressure relief valve 100, the circulation separation mechanism 300, and the mud pump 410. Of course, the pressure relief valve 100 can also be a spring-loaded safety valve that automatically opens when the pressure at the feed end reaches the opening pressure.

[0032] Combine Figure 2 The circulating separation mechanism 300 includes: a stretching roller group, which is installed in the separation container 200 and located at the feed end of the separation container 200; a filter belt 310, which is stretched on the stretching roller group and is divided into a separation section 311 and a cleaning section 312 by the stretching roller group. The separation section 311 is used to filter out gravel in the mud and output the gravel from the separation container 200; a cleaning roller 320, which is installed in the separation container 200 and can rotate (adapted to be equipped with a drive motor) and is located at the lower side of the cleaning section 312 to sweep away the mud attached to the filter belt 310; wherein the collecting container 400 is an open funnel-shaped container, the collecting container 400 is located in the space enclosed by the filter belt 310, and the opening of the collecting container 400 is located at the lower side of the separation section 311.

[0033] Thus, the filter mesh belt 310 is driven to move in a circular motion by the tensioning roller group. On the one hand, the filter mesh belt 310 can filter the mud entering the separation container 200 and transport gravel. On the other hand, the filter mesh belt 310 can be moved relative to the cleaning roller 320 to sweep away the mud attached to the filter mesh belt 310 through the cleaning roller 320, so as to restore the mud flow capacity of the corresponding mesh belt section of the filter mesh belt 310, and send the cleaned filter mesh belt 310 to the feed section of the separation container 200, thereby ensuring that the filter mesh belt 310 has sufficient mud passability while realizing circular separation.

[0034] It can be understood that the length of the separation section 311 of the filter mesh belt 310 should be greater than the width of the feed channel outlet of the separation container 200. Normally, the length of the separation section 311 of the filter mesh belt 310 is greater than 3 times the width of the feed channel outlet of the separation container 200, and the filter mesh belt 310 is slightly tilted upward (the inclination angle is less than 5°), and a slag chute is installed below the higher end of the filter mesh belt 310. In the process of the filter mesh belt 310 moving from the feed channel outlet of the separation container 200 to the slag chute, the mud continues to fall through the mesh of the filter mesh belt 310 to the collection container 400 to ensure that the mud and stone mud can be effectively separated.

[0035] In this embodiment, the filter mesh belt 310 is a polyurethane-coated steel mesh belt to improve the anti-stickiness of the filter mesh belt 310 and reduce the amount of mud attached to the filter mesh belt 310 .

[0036] Specifically, the tensioning roller group includes: a driving roller 331, which is installed at one end of the upper side of the separation container 200; a first driven roller 332, which is installed at the other end of the upper side of the separation container 200 and is at least partially located outside the opening of the separation container 200; a second driven roller 333, which is installed in the separation container 200 and is located below the collection container 400, so that the collection container 400 can be installed in the space surrounded by the filter belt 310.

[0037] It can be understood that there are multiple cleaning rollers 320, and the multiple cleaning rollers 320 are arranged at intervals along the length direction of the cleaning section 312 to ensure that the cleaning rollers 320 can effectively clean the mud attached to the filter belt 310.

[0038] Combine Figure 3The cleaning roller 320 is a hollow brush roller, and the brush body of the cleaning roller 320 contacts the surface of the filter mesh belt 310. The sidewall of the cleaning roller 320 is provided with multiple water spray holes 321, and the water spray holes 321 are arranged directly opposite the brush body. A water spray connector 322 is provided at one end of the cleaning roller 320. The water spray connector 322 is used to connect to a clean water source and can rotate relative to the cleaning roller 320 (the water spray connector 322 is fixed to the sidewall of the separation container 200, and the roller body rotates around the water spray connector 322). When the cleaning roller 320 needs to be cleaned or the cleaning roller 320 needs to improve its cleaning cleanliness, clean water can be supplied to the cleaning roller 320, thereby rinsing the clean water roller and brushing the filter mesh belt 310 with clean water.

[0039] Correspondingly, the bottom of the separation container 200 is funnel-shaped, and a sewage pump 210 is installed at the bottom of the separation container 200 to pump away the sewage collected at the bottom of the separation container 200 .

[0040] On this basis, this embodiment also includes a buffer container 500, which is connected between the pressure relief valve 100 and the separation container 200, so as to buffer the gushing mud through the buffer container 500, reduce the impact of the mud on the circulation separation mechanism 300, improve the stability of the operation of the circulation separation mechanism 300 and extend its service life.

[0041] Combine Figure 4 The buffer container 500 is provided with: a feed pipe 510, connected to one side of the buffer container 500, and communicated with the inner cavity of the buffer container 500; a discharge pipe 520, connected to the bottom of the buffer container 500, arranged on the same side as the feed pipe 510, and the lower end is connected to the feed end of the separation container 200; a damping shock absorber 530 (adapted with a hydraulic cylinder and a return spring), one end of which is installed in the buffer container 500 and is arranged opposite to the discharge end of the feed pipe 510; a buffer plate 540, which is vertically installed at the bottom of the buffer container 500. At the other end of the damping shock absorber 530, the cross-section is adapted to the inner cavity cross-section of the buffer container 500 and can move along the length direction of the buffer container 500; the guide plate 550 is installed below the buffer plate 540 and is tilted downward, with one end extending to the mouth of the discharge pipe 520 and the other end extending to the side of the buffer plate 540 away from the feed pipe 510, so as to ensure that the buffer container 500 can effectively absorb the kinetic energy of the gushing mud, while reducing the impact of the gushing mud on the buffer container 500 itself.

[0042] In summary, the shield machine screw conveyor gushing pressure relief device provided in this embodiment includes a pressure relief valve 100, a separation container 200, a circulating separation mechanism 300, a collection container 400, and a buffer container 500. The pressure relief valve 100 is connected to the slag outlet of the screw conveyor in operation and can be opened at a set pressure. When the pressure at the rear of the screw conveyor exceeds the set value, it automatically gushed out pressure relief, thereby maintaining the soil bin pressure at a stable level. The buffer container 500 is connected between the pressure relief valve 100 and the separation container 200, and the circulating separation mechanism 300 is installed within the separation container 200.

[0043] Therefore, when the pressure within the screw conveyor reaches the set value, the pressure relief valve 100 opens, simultaneously activating the drive roller 331, the cleaning roller 320, and the mud pump 410 (the linear velocity of the cleaning roller 320 should be at a certain speed relative to the speed of the filter belt 310, ensuring that the brushes of the cleaning roller 320 can remove mud from the filter belt 310). The mud released from the screw conveyor flows into the buffer container 500 and impacts the buffer plate 540, driving the damping absorber 530 to reciprocate, thereby absorbing the kinetic energy of the gushing mud and slowing the movement of the gravel and rock particles contained in the mud. After absorbing the energy through the buffer plate 540, the mud and gravel are then directed by the guide plate 550 to the discharge pipe 520 of the buffer container 500, where they enter the feed channel of the separation container 200 and are discharged through the discharge port of the feed channel of the separation container 200.

[0044] The filter belt 310 is a filter that is driven by the roller 331 to pass through the filter belt 310 so that the filter belt 310 can pass through the filter belt 310 and the filter belt 310 can pass through the filter belt 310 to pass through the filter belt 310. The output gravel is transported to the shield machine transmission belt through the slag chute for transportation, while the mud is collected by the collection container 400. The mud collected by the collection container 400 is transported to the sewage treatment pool (usually a sedimentation pool set outside the tunnel) through the mud pump 410 and the corresponding transportation pipeline, so as to send the mud to the mud treatment mechanism to avoid mud discharge in the tunnel and ensure construction safety, thereby improving the shield machine's excavation and slag discharge efficiency and reducing construction costs and risks.

[0045] Among them, this embodiment performs circulation separation through the circulation separation mechanism 300, which can not only output gravel in time, avoid gravel splashing and affecting the normal operation of the mud pump 410, but also enable the separation mechanism to be in a better working state, ensure that the separation mechanism has sufficient flow capacity, and discharge the gushing mud in time, avoid mud blockage and insufficient flow capacity, and thus enable the device to stably relieve the pressure on the shield machine screw conveyor.

[0046] In summary, the shield machine screw conveyor gushing pressure relief device provided in this embodiment can separate the gravel mixed in the mud gushing out of the shield machine screw conveyor and send the mud to the mud treatment mechanism to avoid the mud being discharged in the tunnel and ensure construction safety, thereby improving the shield machine's excavation and slag discharge efficiency and reducing construction costs and construction risks.

[0047] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A shield machine screw conveyor surge pressure relief device, characterized in that: include: The pressure relief valve (100) is capable of conducting at a set pressure and is connected to the slag outlet of the screw conveyor in a working state; A separation container (200) connected to the outlet end of the pressure relief valve (100); A circulating separation mechanism (300) is installed in the separation container (200) and is capable of circulating and separating gravel mixed in the material in the separation container (200) and outputting the gravel; The collecting container (400) is used to collect the mud separated by the circulation separation mechanism (300) and is adapted to be equipped with a mud pump (410).

2. The shield machine screw conveyor surge pressure relief device according to claim 1, characterized in that: The circulation separation mechanism (300) comprises: A tensioning roller assembly is installed in the separation container (200) and is located at the feed end of the separation container (200); a filter belt (310) stretched on the stretching roller assembly and divided into a separation section (311) and a cleaning section (312) by the stretching roller assembly, wherein the separation section (311) is used to filter gravel from the slurry and output the gravel to the separation container (200); a cleaning roller (320), installed in the separation container (200), capable of self-rotation, and located on the lower side of the cleaning section (312), for cleaning away mud attached to the filter mesh belt (310); The collecting container (400) is an open funnel-shaped container, the collecting container (400) is located in the space enclosed by the filter belt (310), and the opening of the collecting container (400) is located on the lower side of the separation section (311).

3. The shield machine screw conveyor surge pressure relief device according to claim 2, characterized in that: The stretching roller group includes: A driving roller (331) is mounted on one end of the upper side of the separation container (200); A first driven roller (332) is installed at the other upper end of the separation container (200) and is at least partially located outside the opening of the separation container (200); The second driven roller (333) is installed in the separation container (200) and is located below the collection container (400).

4. The shield machine screw conveyor surge pressure relief device according to claim 2, characterized in that: A plurality of cleaning rollers (320) are provided, and the plurality of cleaning rollers (320) are arranged at intervals along the length direction of the cleaning section (312).

5. The shield machine screw conveyor surge pressure relief device according to claim 4, characterized in that: The cleaning roller (320) is a hollow brush roller, and the brush body of the cleaning roller (320) contacts the surface of the filter mesh belt (310); The side wall of the cleaning roller (320) is provided with a plurality of water spray holes (321), and the water spray holes (321) are arranged directly opposite the brush body; A water spray joint (322) is provided at one end of the cleaning roller (320), the water spray joint (322) being used to connect to a clean water source, and the water spray joint (322) is capable of rotating relative to the cleaning roller (320).

6. The shield machine screw conveyor surge pressure relief device according to claim 5, characterized in that: The bottom of the separation container (200) is funnel-shaped, and a sewage pump (210) is installed at the bottom of the separation container (200).

7. The shield machine screw conveyor surge pressure relief device according to claim 2, characterized in that: The filter mesh belt (310) is a polyurethane-coated steel mesh belt.

8. The shield machine screw conveyor surge pressure relief device according to claim 1, characterized in that: It also includes a buffer container (500), which is connected between the pressure relief valve (100) and the separation container (200).

9. The shield machine screw conveyor surge pressure relief device according to claim 8, characterized in that: The buffer container (500) is provided with: a feed pipe (510), connected to one side of the buffer container (500) and communicating with the inner cavity of the buffer container (500); A discharge pipe (520) is connected to the bottom of the buffer container (500), is arranged on the same side as the feed pipe (510), and has a lower end connected to the feed end of the separation container (200); A damping vibration absorber (530), one end of which is installed in the buffer container (500) and is arranged facing the discharge end of the feed pipe (510); A buffer plate (540) is vertically mounted on the other end of the damping vibration absorber (530), has a cross section adapted to the cross section of the inner cavity of the buffer container (500), and is movable along the length direction of the buffer container (500); The guide plate (550) is installed below the buffer plate (540) and is tilted downward, with one end extending to the pipe mouth of the discharge pipe (520) and the other end extending to the side of the buffer plate (540) away from the feed pipe (510).

10. The shield machine screw conveyor surge pressure relief device according to any one of claims 1 to 9, characterized in that: The pressure relief valve (100) is an electrically controlled gate valve.

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