Shield tunneling machine and sewage tank and sewage treatment device thereof

Abstract

The invention relates to the technical field of tunnel equipment, in particular to a shield tunneling machine and a sewage tank and a sewage treatment device thereof. The sewage tank of the shield tunneling machine comprises a tank body and a slag removal conveyor arranged in the tank body, the slag removal conveyor comprises a straight section extending along the inner bottom surface of the tank body and an inclined section obliquely extending upwards based on the straight section, and the upper end of the inclined section extends out of the tank body and is located above a slag receiving device during use; a slag scraping structure is arranged on a reciprocating circulating bearing body of the slag removal conveyor; and when the slag removal conveyor runs, the bearing body drives the slag scraping structure to move, so that the slag scraping structure pushes sludge at the bottom of the box body to leave the box body through the straight section and the inclined section so as to be conveyed to a slag receiving device outside the box body. Automatic slag removal and centralized transfer of the sewage tank can be realized, and the convenience of slag removal operation can be improved.

Description

Technical Field

[0001] This invention relates to the field of tunnel equipment technology, specifically to a tunnel boring machine and its sewage tank and sewage treatment device. Background Technology

[0002] During tunnel boring machine (TBM) construction, a large amount of industrial wastewater containing solid particles such as mud and slag is inevitably generated due to construction processes such as cleaning tunnel segments, flushing grouting pipelines, and cleaning equipment. Generally, this wastewater is first pumped into a wastewater tank on a trailer attached to the tunnel, and then discharged from the tank to the outside of the tunnel.

[0003] Conventional sewage tank structures only function as sewage settling and transfer points. During use, sludge from the sewage tends to accumulate at the bottom of the tank, requiring manual cleaning after a period of use. Due to the limited space and relatively harsh environment of shield tunneling construction, manual labor is limited, inefficient, and poses safety hazards. With the promotion of shield tunneling, more research and solutions have been developed to address this problem.

[0004] For example, Chinese utility model patent CN219452104U discloses a wastewater tank for tunnel boring machines that is less prone to sedimentation. It incorporates a stirring function to effectively prevent sludge from settling in the tank. However, discharging the sludge-containing wastewater through pipes inside the tunnel increases the risk of blockage in these pipes. Another Chinese utility model patent CN213168754U discloses an automatically cleanable wastewater tank for tunnel boring machines, which removes deposited sludge. While this avoids the risk of pipe blockage from direct sludge discharge, the cleaning process is complex and inconvenient. Furthermore, the high-pressure air blown in after attaching woven bags poses a significant safety hazard. Therefore, it is essential to develop a wastewater tank that is easy and safe to clean. Summary of the Invention

[0005] The purpose of this invention is to provide a sewage tank for tunnel boring machines (TBMs) to solve the problem of inconvenient slag removal operations in current sewage tanks; the purpose of this invention is also to provide a sewage treatment device and a TBM for TBMs to solve the above-mentioned problems.

[0006] The technical solution for the tunnel boring machine sewage tank of the present invention is as follows: A wastewater tank for a tunnel boring machine includes a tank body and a slag removal conveyor installed inside the tank body. The slag removal conveyor includes a straight section extending along the bottom surface of the tank body and an inclined section extending upward from the straight section. The upper end of the inclined section extends out of the tank body and is positioned above a slag receiving device during use. A slag scraping structure is provided on the reciprocating carrier of the slag removal conveyor. When the slag removal conveyor is running, the slag scraping structure is moved by the carrier, causing the slag scraping structure to push the mud and slag at the bottom of the tank body through the straight section and the inclined section to leave the tank body for conveying to the slag receiving device outside the tank body.

[0007] Furthermore, the slag scraping structure is a slag scraper, which has a scraper portion that is inclined toward the side facing the running direction of the carrier.

[0008] Furthermore, the carrier is a chain, and the slag scraping structure is a slag scraper fixed on the chain. The two ends of the slag scraper in the length direction are respectively fixed on the corresponding chain, and there are multiple slag scrapers that are distributed at intervals along the running direction of the chain.

[0009] Furthermore, the carrier is a conveyor belt, and the slag scraping structure is a slag scraper fixed on the carrier surface of the conveyor belt. There are multiple slag scrapers and they are distributed at intervals along the running direction of the conveyor belt.

[0010] Furthermore, an auxiliary conveyor is provided on the upper side of the inclined section of the slag removal conveyor. Both the slag removal conveyor and the auxiliary conveyor are belt conveyors. The length direction of the auxiliary conveyor is consistent with the length direction of the inclined section of the slag removal conveyor. An auxiliary push plate is provided on the belt of the auxiliary conveyor. The auxiliary push plate and the scraper are offset along the belt running direction so that the auxiliary push plate cooperates with the scraper to push the sludge.

[0011] Furthermore, the tank is equipped with a sludge height monitoring device to control the operation of the sludge removal conveyor when the sludge in the sewage tank reaches a set height.

[0012] Furthermore, the upper end of the inclined section of the slag removal conveyor extends to one side of the box body along its length, and the length of the straight section is consistent with the length of the box body, and the length of the straight section is not less than half the length of the box body.

[0013] Beneficial effects: This invention improves upon existing tunnel boring machine sewage tanks by incorporating a slag removal conveyor inside the tank. Part of the conveyor extends parallel to the bottom surface of the tank, while another part extends upwards at an angle from the bottom. A scraping structure is installed on the conveyor's reciprocating circulatory support. During operation, the scraping structure in the straight section of the conveyor scrapes away deposited sludge along the bottom of the tank, propelling it forward. The sludge then moves upwards along the inclined section and is carried out of the tank, where it is received by a slag receiving device. This process cleans the sludge deposited inside the sewage tank. Thus, cleaning can be performed simply by activating the slag removal conveyor when needed, enabling automatic slag removal and centralized transfer of the sewage tank, significantly improving the convenience of the cleaning operation.

[0014] The technical solution of the tunnel boring machine sewage treatment device of the present invention is as follows: A sewage treatment device for a shield machine, comprising a sewage tank of the shield machine and a slag receiving device supporting the sewage tank of the shield machine. The sewage tank of the shield machine includes a box body and a slag cleaning conveyor arranged inside the box body. The slag cleaning conveyor includes a straight section extending along the inner bottom surface of the box body and an inclined section extending obliquely upward based on the straight section. The upper end of the inclined section extends out of the box body and is located above the slag receiving device during use. A slag scraping structure is provided on the reciprocating and circulating carrier of the slag cleaning conveyor. When the slag cleaning conveyor operates, the carrier moves with the slag scraping structure, and the slag scraping structure pushes the sludge at the bottom of the box body to leave the box body through the straight section and the inclined section for conveying to the slag receiving device outside the box body.

[0015] Further, the slag scraping structure is a slag scraping plate, and the slag scraping plate has a scraping part inclined towards one side of the running direction of the carrier.

[0016] Further, the carrier is a chain, and the slag scraping structure is a slag scraping plate fixed on the chain. Both ends of the slag scraping plate in the length direction are respectively fixed on the corresponding chain, and there are multiple slag scraping plates spaced along the running direction of the chain.

[0017] Further, the carrier is a conveyor belt, and the slag scraping structure is a slag scraping plate fixed on the carrying surface of the conveyor belt. There are multiple slag scraping plates spaced along the running direction of the conveyor belt.

[0018] Further, a boosting conveyor is provided on the upper side of the inclined section of the slag cleaning conveyor. Both the slag cleaning conveyor and the boosting conveyor are belt conveyors. The length direction of the boosting conveyor is consistent with the length direction of the inclined section of the slag cleaning conveyor. A boosting push plate is provided on the belt of the boosting conveyor. The boosting push plate is misaligned with the slag scraping plate along the running direction of the belt so that the boosting push plate cooperates with the slag scraping plate to push the sludge.

[0019] Further, a sludge height monitoring device is provided on the box body to control the operation of the slag cleaning conveyor when the sludge in the sewage tank reaches a set height.

[0020] Further, the upper end of the inclined section of the slag cleaning conveyor extends to one side in the length direction of the box body. The length direction of the straight section is consistent with the length direction of the box body, and the length of the straight section is not less than half of the length of the box body.

[0021] Further, the slag receiving device is a sludge collection box, and the sludge collection box has an upward opening for the sludge to fall into the sludge collection box from the upper end of the slag cleaning conveyor.

[0022] Further, the sludge collection box is equipped with a lifting device for lifting and transferring it.

[0023] Further, the sludge collection box is equipped with a delivery pump for sucking the sludge in the sludge collection box and conveying it out in cooperation with a slag discharge pipeline.

[0024] Further, the slag receiving device is a transfer conveyor belt. During use, the mud slag falls from the upper end of the slag cleaning conveyor onto the transfer conveyor belt to utilize the transfer conveyor belt to convey the mud slag out.

[0025] Beneficial effects: The present invention improves the existing sewage tank of the shield machine. A slag cleaning conveyor is provided in the sewage tank. Part of the slag cleaning conveyor extends parallel to the inner bottom surface of the tank body, and part extends obliquely upward from the bottom of the tank body. A slag scraping structure is provided on the reciprocating circulating carrier of the conveyor. When the slag cleaning conveyor is operating, by using the slag scraping structure in the straight section of the slag cleaning conveyor, the deposited mud slag can be scraped along the bottom of the tank body and the mud slag can be pushed to move. The mud slag enters the inclined section along with the slag scraping structure, gradually moves upward and is taken out of the tank body, and then is received by the slag receiving device outside the tank, realizing the cleaning of the deposited mud slag in the sewage tank. In this way, when slag cleaning is required, the slag cleaning conveyor can be started to carry out the cleaning operation, which can achieve automatic slag cleaning and centralized transfer of the sewage tank, and is beneficial to improving the convenience of slag cleaning operation.

[0026] The technical solution of the shield machine of the present invention is: A shield machine includes a shield machine sewage treatment device. The shield machine sewage treatment device includes a shield machine sewage tank and a slag receiving device supporting the shield machine sewage tank. The shield machine sewage tank includes a tank body and a slag cleaning conveyor provided in the tank body. The slag cleaning conveyor includes a straight section extending along the inner bottom surface of the tank body and an inclined section extending obliquely upward based on the straight section. The upper end of the inclined section extends out of the tank body and is above the slag receiving device during use. A slag scraping structure is provided on the reciprocating circulating carrier of the slag cleaning conveyor. When the slag cleaning conveyor is operating, the carrier moves with the slag scraping structure, and the slag scraping structure pushes the mud slag at the bottom of the tank body to leave the tank body through the straight section and the inclined section for conveying to the slag receiving device outside the tank.

[0027] Further, the slag scraping structure is a slag scraping plate, and the slag scraping plate has a scraping part inclined towards the side of the running direction of the carrier.

[0028] Further, the carrier is a chain, and the slag scraping structure is a slag scraping plate fixed on the chain. The two ends in the length direction of the slag scraping plate are respectively fixed on the corresponding chains. There are multiple slag scraping plates and they are distributed at intervals along the running direction of the chain.

[0029] Further, the carrier is a conveyor belt, and the slag scraping structure is a slag scraping plate fixed on the bearing surface of the conveyor belt. There are multiple slag scraping plates and they are distributed at intervals along the running direction of the conveyor belt.

[0030] Further, a boosting conveyor is provided on the upper side of the inclined section of the slag cleaning conveyor. Both the slag cleaning conveyor and the boosting conveyor are belt conveyors. The length direction of the boosting conveyor is the same as the length direction of the inclined section of the slag cleaning conveyor. A boosting push plate is provided on the belt of the boosting conveyor. The boosting push plate is offset from the slag scraping plate along the running direction of the belt to make the boosting push plate cooperate with the slag scraping plate to push the mud slag.

[0031] Furthermore, the tank is equipped with a sludge height monitoring device to control the operation of the sludge removal conveyor when the sludge in the sewage tank reaches a set height.

[0032] Furthermore, the upper end of the inclined section of the slag removal conveyor extends to one side of the box body along its length, and the length of the straight section is consistent with the length of the box body, and the length of the straight section is not less than half the length of the box body.

[0033] Furthermore, the slag receiving device is a slag collection box with an upward-facing opening for slag to fall from the top of the slag removal conveyor into the slag collection box.

[0034] Furthermore, the sludge collection box is equipped with a hoisting device for lifting and transferring it.

[0035] Furthermore, the sludge collection box is equipped with a conveying pump to suck up the sludge inside the collection box and transport it out in conjunction with the sludge discharge pipeline.

[0036] Furthermore, the slag receiving device is a transfer conveyor belt. During use, the slag falls from the top of the slag removal conveyor onto the transfer conveyor belt so that the slag can be transported out using the transfer conveyor belt.

[0037] Beneficial Effects: This invention improves upon existing tunnel boring machine (TBM) sewage tanks by incorporating a slag removal conveyor inside the tank. Part of the conveyor extends parallel to the bottom surface of the tank, while another part extends upwards at an angle from the bottom. A scraping structure is installed on the conveyor's reciprocating circulatory support. During operation, the scraping structure in the straight section of the conveyor scrapes away deposited sludge along the bottom of the tank, propelling it upwards. The sludge then moves as the scraping structure enters the inclined section, gradually moving upwards and being carried out of the tank, where it is received by a slag receiving device outside the tank. This process cleans the sludge deposited inside the sewage tank. Thus, cleaning can be performed simply by activating the slag removal conveyor when needed, enabling automatic slag removal and centralized transfer of the sewage tank, significantly improving the convenience of the cleaning operation. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the tunnel boring machine sewage treatment device of the present invention; Figure 2 for Figure 1 A schematic diagram illustrating the operation process of the wastewater treatment device for tunnel boring machines; Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the tunnel boring machine sewage treatment device of the present invention; Figure 4 This is a schematic diagram of the structure of Embodiment 3 of the tunnel boring machine sewage treatment device of the present invention; Figure 5 This is a schematic diagram of the structure of Embodiment 4 of the tunnel boring machine sewage treatment device of the present invention.

[0039] In the diagram: 1. Sewage tank; 2. Chain; 3. Sludge scraper; 4. Sewage tank sludge height monitoring device; 5. Sludge collection box; 6. Sludge collection box sludge height monitoring device; 7. Sludge collection box transfer device; 8. Main belt conveyor; 9. Auxiliary belt conveyor; 10. Transfer pump; 11. Transfer conveyor. Detailed Implementation

[0040] The basic concept of the tunnel boring machine sewage treatment device of the present invention is to set up a slag removal conveyor with a straight section and an inclined section inside the tank. The straight section scrapes the deposited slag along the bottom of the tank, and the inclined section lifts the slag out for collection by the slag receiving device. In this way, the slag removal conveyor can be turned on when slag removal is needed to carry out the cleaning operation, realizing automatic slag removal and centralized transfer of sewage tank, which helps to improve the convenience of slag removal operation.

[0041] The following detailed description is provided in conjunction with specific embodiments. Embodiment 1 of the wastewater treatment device for tunnel boring machines of the present invention: like Figure 1 As shown, the tunnel boring machine's sewage tank includes a sewage tank body 1. The sewage tank is typically installed on the last trailer section of the tunnel boring machine. Sewage is discharged into the sewage tank for settling. The sewage tank body has an inlet for sewage inflow and an outlet for the settled sewage outflow. After prolonged use, a thick layer of sludge accumulates at the bottom of the sewage tank, requiring cleaning. In this embodiment, the sewage tank includes a sludge removal conveyor installed inside the sewage tank. The sludge removal conveyor is a chain conveyor used to remove the sludge deposited at the bottom of the sewage tank.

[0042] The sludge conveyor includes a straight section extending along the inner bottom surface of the sewage tank 1 and an inclined section extending upwards from the straight section. In other words, the reciprocating circulatory carrier of the conveyor has both a straight section and an inclined section. The straight section is parallel to the inner bottom surface of the sewage tank and spaced at a certain distance. The inclined section forms an obtuse angle with the straight section. The straight section and the inclined section are formed by the same carrier. The upper end of the inclined section extends out of the sewage tank and is positioned above the sludge receiving device during use. The reciprocating circulatory carrier of the sludge conveyor is equipped with a sludge scraping structure. During operation, the sludge conveyor moves along the carrier, causing the scraping structure to push the sludge at the bottom of the sewage tank through the straight and inclined sections of the sludge conveyor, leaving the sewage tank and transporting it to the sludge receiving device outside the tank.

[0043] By utilizing the scraping structure of the sludge conveyor in the straight section, the sludge deposited at the bottom of the sewage tank 1 can be scraped and pushed to move. As the sludge enters the inclined section with the scraping structure, it gradually moves upward and is carried out of the sewage tank, where it is received by the sludge receiving device outside the sewage tank. This achieves the cleaning of the sludge deposited inside the sewage tank. Thus, the cleaning operation can be carried out by turning on the sludge conveyor when sludge cleaning is needed. This enables automatic sludge cleaning and centralized transfer of sewage tanks, which helps to improve the convenience of sludge cleaning operations.

[0044] The sewage tank 1 is a rectangular box structure with dimensions in the length, width, and height directions. The height direction is vertical, the length direction is defined as the front-to-back direction, and the width direction is defined as the left-to-right direction. The inclined section of the sludge conveyor extends to one side of the sewage tank along its length, facilitating the collection of sludge by the sludge receiving device. The straight section runs parallel to the length of the sewage tank and is at least half the length of the tank, allowing for better cleaning of sludge at the bottom. The straight section extends along the front-to-back direction and is close to one side wall of the tank in that direction. The inclined section extends upwards from the straight section along the front-to-back direction and is close to the other side wall of the tank in that direction. The upper end of the inclined section and the end of the straight section near the front-to-back side wall of the tank constitute the two ends of the sludge conveyor.

[0045] The scraping structure is a scraper plate 3, which has a scraper portion inclined towards the running direction of the carrier. The scraper portion is inclined relative to the carrier and towards the running direction of the carrier, forming a certain inclination angle. In this way, when the sludge conveyor is running, the scraper portion can generate a large cutting force on the deposited sludge, which facilitates cleaning without affecting the sludge conveying. In other embodiments, the scraper plate may also be set perpendicular to the carrier instead of inclined.

[0046] In this embodiment, the slag removal conveyor is a chain conveyor, including a frame, sprockets mounted on the frame, and chains 2 mounted on the sprockets, with the chains 2 serving as the load-bearing body. The chains 2 operate in a cyclical manner, having an upper section and a lower section, with the upper and lower sections parallel to each other. There are two chains 2, arranged side-by-side, each chain 2 equipped with four sprockets. Two of the four sprockets are located at both ends of the conveyor, and two are located in the middle of the conveyor, where the inclined and straight sections meet. The two sprockets redirect the upper and lower sections of the chain 2, forming an inclined section and a straight section at a certain angle. In other embodiments, the slag removal conveyor can also use a chain plate conveyor belt, with scraper plates fixed to the chain plates, where sludge is mainly deposited.

[0047] The scraper blades 3 are fixed at both ends along their length to the left and right chains 2. Multiple scraper blades 3 are distributed at intervals along the running direction of the chains 2, covering the entire chain 2. When the scraper blades 3 reach the upper part of the straight section of the chain 2, they scrape the sludge on the upper side of the chain 2; when they reach the lower part of the straight section of the chain 2, they scrape the sludge on the lower side of the chain 2. The distance between the lower part of the straight section of the chain 2 and the inner bottom surface of the sewage tank 1 is adapted to the height of the scraper blades 3, facilitating thorough cleaning.

[0048] The frame of the slag removal conveyor is fixed to the sewage tank 1. The frame is a frame structure, accommodating the installation of sprockets and chains 2. This frame itself is a conventional structure and will not be described in detail here. The width of the frame in the left and right directions is adapted to the internal width of the sewage tank 1, which can increase the coverage area of ​​the scraper blades 3. One of the sprockets is located on a shaft that is connected to a drive motor. The drive motor can be a submersible motor and can be located inside or outside the sewage tank, with transmission through a coupling passing through the side wall of the tank. The drive motor can drive the sprocket corresponding to the straight section.

[0049] The internal space of the sludge conveyor frame and the space between adjacent scraper plates 3 do not affect the sludge deposition at the bottom of the sewage tank 1. The frame can be fixed to the left and right side walls of the sewage tank 1. In other embodiments, a separate frame may not be provided. Instead, after determining the position of the sprocket, mounting supports are set at corresponding positions on the tank, and the sprockets are installed using the mounting supports. That is, the tank is used as the frame.

[0050] The scraper plate 3 can be a flat plate with its length direction running left and right. Its left and right ends are respectively fixed to the left and right chains 2. The scraper plate 3 protrudes from the chains 2 to scrape the mud. In other embodiments, the scraper plate can also be a V-shaped plate with two parts at an angle. One part is flush with the chain and fixed, and the other part is inclined relative to the chain and forms a scraper part. The space between the two parts can stably drive the mud upward in the inclined section.

[0051] The sludge receiving device is a sludge collection box 5, which has an upward-facing opening to allow sludge to fall from the top of the sludge cleaning conveyor into the sludge collection box 5. The sludge collection box 5 is located on one side of the length direction of the sewage tank 1. The upper end of the inclined section of the sludge cleaning conveyor extends from the top of the sewage tank 1 and extends above the sludge collection box 5. The sludge pushed to the upper end of the inclined section of the sludge cleaning conveyor by the scraper 3 naturally falls into the sludge collection box 5.

[0052] The sewage tank 1 is equipped with a sewage tank sludge height monitoring device 4 to control the operation of the sludge removal conveyor when the sludge in the sewage tank reaches a set height. The sludge collection box 5 is equipped with a sludge collection box sludge height monitoring device 6. The sludge collection box 5 is equipped with a hoisting device for lifting and transferring it; this hoisting device is the sludge collection box transfer device 7. The sewage tank sludge height monitoring device 4 monitors the sludge height inside the sewage tank 1. The sludge collection device collects the sludge removed by the scraper 3 and can be hoisted and transported as a whole. The sludge collection box sludge height monitoring device 6 monitors the sludge height inside the sludge collection box 5 for timely transfer and cleaning. The sludge collection box transfer device 7 is used for hoisting and transporting the sludge collection box 5 as a whole. Both the sludge collection box sludge height monitoring device 6 and the sewage tank sludge height monitoring device 4 use level sensors, which are mature products and will not be described further. The sensors feed back signals to the corresponding control system, which then issues a command to operate the sludge removal conveyor.

[0053] Combination Figure 2 When sewage is discharged into the sewage tank, sludge accumulates continuously. When the sludge height monitoring device detects that the sludge level in the sewage tank has reached a preset height, a sludge-cleaning conveyor, consisting of chains and multiple scrapers, automatically starts, transferring the sludge from the sewage tank to a sludge collection box for automatic collection. At this time, the sludge in the collection box gradually increases. When the sludge height monitoring device on the collection box detects that the sludge has reached a preset height, the sludge collection box transfer device starts, lifting and transferring the fully loaded collection box onto a truck, achieving overall sludge transfer.

[0054] This invention relates to an automated slag removal and wastewater treatment device for shield tunneling construction. It is simple to operate, automatically removes slag, and does not increase the risk of pipe blockage within the tunnel. It enables automatic collection and centralized transfer of wastewater, significantly reducing labor and construction time costs associated with cleaning accumulated slag from wastewater tanks.

[0055] Embodiment 2 of the wastewater treatment device for tunnel boring machines of the present invention: The difference between this embodiment and Embodiment 1 above lies in the conveying method of the slag removal conveyor. In this embodiment, the slag removal conveyor is a belt conveyor, the corresponding carrier is a conveyor belt, and the slag scraping structure is a scraper plate fixed on the carrier surface of the conveyor belt. The belt is equipped with corresponding pulleys, and the scraper plate is fixed on the belt. The belt has corresponding inclined sections and straight sections. Sludge can accumulate on the belt without affecting the operation of the conveyor.

[0056] like Figure 3As shown, the slag removal conveyor is a main belt conveyor 8. To ensure reliable conveying, an auxiliary conveyor is provided on the upper side of the inclined section of the slag removal conveyor. The auxiliary conveyor is an auxiliary belt conveyor 9. Both the slag removal conveyor and the auxiliary conveyor are belt conveyors. The length direction of the auxiliary conveyor is consistent with the length direction of the inclined section of the slag removal conveyor. An auxiliary push plate is provided on the belt of the auxiliary conveyor. The auxiliary push plate and the scraper plate 3 are offset along the belt running direction so that the auxiliary push plate cooperates with the scraper plate 3 to push the slag.

[0057] The frame of the auxiliary belt conveyor 9 is fixed to the housing, and corresponding pulleys or rollers are installed on the frame. The auxiliary belt conveyor 9 extends at an incline with a fixed conveying direction. There is a gap between the inclined section of the auxiliary belt conveyor 9 and the main belt conveyor 8, which allows for the movement of the scraper plate 3 and the assist push plate. The diagram is for illustration only; the actual product has a gap that will not interfere with operation. The belt of the auxiliary belt conveyor 9 runs in the opposite direction to the main belt conveyor 8, and the pulleys rotate in the opposite direction. The scraper plate 3 on the upper part of the inclined section of the main belt conveyor 8 moves from bottom to top, while the assist push plate on the lower part of the belt of the auxiliary belt conveyor 9 moves from bottom to top. The assist push plates are spaced out and fully distributed on the belt of the auxiliary belt conveyor 9. During operation, they are staggered with the scraper plate 3 and overlap in the inclined direction, which can jointly drive the sludge upward and improve the load-bearing capacity.

[0058] Embodiment 3 of the wastewater treatment device for tunnel boring machines of the present invention: The difference between this embodiment and Embodiment 1 above lies in the slag receiving device. In this embodiment, as follows: Figure 4 As shown, the sludge collection box 5 is not equipped with a hoisting device, but is instead equipped with a transfer pump, namely a transfer pump 10, used to suck up the sludge from the sludge collection box 5 and transport it out through the slag discharge pipeline to the outside of the tunnel. The transfer pump 10 can be a vacuum pump, using this pneumatic conveying device to directly transfer the sludge. The transfer pump 10 can be installed outside the sludge collection box 5, with its inlet end extending into the sludge collection box 5 through a connecting pipe, and its outlet end connected to the slag discharge pipeline.

[0059] Embodiment 4 of the wastewater treatment device for tunnel boring machines of the present invention: The difference between this embodiment and Embodiment 1 above lies in the slag receiving device. In this embodiment, as follows: Figure 5 As shown, the slag receiving device is a transfer conveyor 11, which is a belt conveyor. When in use, the slag falls from the top of the slag removal conveyor onto the transfer conveyor belt so that the slag can be transported out using the transfer conveyor belt. Continuous slag transfer can be achieved by using a continuous belt conveyor inside the tunnel and discharged outside the tunnel.

[0060] Embodiment of the tunnel boring machine sewage tank of the present invention: The tunnel boring machine sewage tank in this embodiment is the same as the tunnel boring machine sewage tank in any of the above-mentioned tunnel boring machine sewage treatment device embodiments, and will not be described again here.

[0061] Embodiments of the tunnel boring machine of the present invention: The tunnel boring machine includes a sewage treatment device, which is the same as the sewage treatment device in any of the above embodiments of the tunnel boring machine sewage treatment device, and will not be described again here.

[0062] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sewage tank for a tunnel boring machine, characterized in that, It includes a box body and a slag cleaning conveyor arranged inside the box body. The slag cleaning conveyor includes a straight section extending along the inner bottom surface of the box body and an inclined section extending obliquely upward based on the straight section. The upper end of the inclined section extends out of the box body and is above the slag receiving device during use. A slag scraping structure is provided on the reciprocating and circulating carrier of the slag cleaning conveyor. When the slag cleaning conveyor operates, the carrier moves with the slag scraping structure, and the slag scraping structure pushes the sludge at the bottom of the box body to leave the box body through the straight section and the inclined section for conveying to the slag receiving device outside the box body.

2. The wastewater tank for tunnel boring machines according to claim 1, characterized in that, The slag scraping structure is a slag scraping plate, and the slag scraping plate has a scraping part inclined towards one side of the running direction of the carrier.

3. The wastewater tank for tunnel boring machines according to claim 1, characterized in that, The carrier is a chain, and the slag scraping structure is a slag scraping plate fixed on the chain. The two ends of the slag scraping plate in the length direction are respectively fixed on the corresponding chains, and there are multiple slag scraping plates distributed at intervals along the running direction of the chain.

4. The wastewater tank for tunnel boring machines according to claim 1, characterized in that, The carrier is a conveyor belt, and the slag scraping structure is a slag scraping plate fixed on the carrying surface of the conveyor belt. There are multiple slag scraping plates distributed at intervals along the running direction of the conveyor belt.

5. The wastewater tank for tunnel boring machines according to claim 4, characterized in that, A boosting conveyor is provided on the upper side of the inclined section of the slag cleaning conveyor. Both the slag cleaning conveyor and the boosting conveyor are belt conveyors. The length direction of the boosting conveyor is the same as the length direction of the inclined section of the slag cleaning conveyor. A boosting push plate is provided on the belt of the boosting conveyor. The boosting push plate is misaligned with the slag scraping plate along the running direction of the belt to enable the boosting push plate to cooperate with the slag scraping plate to push the sludge.

6. The tunnel boring machine sewage tank according to any one of claims 1-5, characterized in that, A sludge height monitoring device is provided on the box body to control the operation of the slag cleaning conveyor when the sludge in the sewage tank reaches the set height.

7. The tunnel boring machine sewage tank according to any one of claims 1-5, characterized in that, The upper end of the inclined section of the slag cleaning conveyor extends to one side in the length direction of the box body. The length direction of the straight section is the same as the length direction of the box body, and the length of the straight section is not less than half of the length of the box body.

8. A wastewater treatment device for a tunnel boring machine, characterized in that, It includes the shield machine sewage tank according to any one of the above claims 1-7 and a slag receiving device配套 with the shield machine sewage tank.

9. The wastewater treatment device for tunnel boring machines according to claim 8, characterized in that, The slag receiving device is a sludge collection box, and the sludge collection box has an upward opening for the sludge to fall into the sludge collection box from the upper end of the slag cleaning conveyor.

10. The wastewater treatment device for tunnel boring machines according to claim 9, characterized in that, The sludge collection box is equipped with a hoisting device for hoisting and transferring it.

11. The wastewater treatment device for tunnel boring machines according to claim 9, characterized in that, The sludge collection box is equipped with a transfer pump for sucking the sludge in the sludge collection box and conveying it out in cooperation with the slag discharge pipeline.

12. The wastewater treatment device for tunnel boring machines according to claim 8, characterized in that, The slag receiving device is a transfer conveyor belt. During use, the sludge falls from the upper end of the slag cleaning conveyor onto the transfer conveyor belt to utilize the transfer conveyor belt to convey the sludge out.

13. A tunnel boring machine, characterized in that, It includes the shield machine sewage treatment device according to any one of the above claims 8-12.

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