A shield slurry continuous dewatering treatment device and method

Abstract

The present application belongs to the field of shield waste slurry continuous dewatering, and discloses a shield waste slurry continuous dewatering treatment device and method, which comprises a supporting frame, a cleaning mechanism and a pressurizing assembly. The upper end of the supporting frame is fixed with a propelling assembly, and a plurality of pressing plates are equidistantly arranged at the upper end of the supporting frame. A filter plate is arranged between the pressing plates, and a sliding groove is formed in the inner side of the pressing plate. The cleaning mechanism comprises a needle plate, a cleaning plate and a limiting assembly, and the needle plate is slidably connected to the inner side of the sliding groove. The pressurizing assembly is fixed between the cleaning plate and the pressing plate. The cleaning mechanism is arranged between the pressing plate and the filter plate. The pressure of the pressing plate on the filter plate makes the needle plate penetrate into the inner side of the filter plate, and the stubborn dirt adhered by the high-viscosity particles and the coarse and hard particles on the filter plate is dredged. Compared with the flexible material of the brush, the dredging intensity can be improved. At the same time, the needle plate is driven by the extrusion force of the pressing plate on the filter plate, so that the filter plate can be dredged multiple times in the process of continuous dewatering without shutdown.

Description

Technical Field

[0001] This disclosure pertains to the field of continuous dewatering of tunnel boring machine (TBM) waste slurry, and specifically relates to a continuous dewatering treatment device and method for TBM waste slurry. Background Technology

[0002] The treatment of tunnel boring machine waste slurry involves environmental protection and resource recycling. With the increasing environmental protection requirements and the improvement of slag management standards, solid-liquid separation of the mud and water in the waste slurry can reduce the overall cost and maximize the project management benefits compared to the traditional method of directly transporting the waste slurry.

[0003] For shield tunneling waste slurry dewatering, plate and frame filter presses are used. By applying external pressure to the waste slurry, solid particles in the liquid medium are separated, thus achieving solid-liquid separation. However, when dealing with complex strata, such as composite strata on underground tunnel sections, which contain silty clay, fine sand, medium-coarse sand, or weathered rock, the mixture of silty clay and medium-coarse sand forms large, hard particles that easily clog the filter plates. Traditional cleaning devices mostly use vibrators or cleaning brushes to shake off the blockages. However, sticky particles and coarse, hard particles stick together tightly and are difficult to clean. Furthermore, when cleaning the filter plates with a brush, the filter plates usually need to be kept stationary, which affects the dewatering speed of the device. If cleaning is performed after all filtration is completed, it will lead to excessive clogging of the filter pores in the later stages, resulting in a decrease in subsequent water output efficiency as the usage time increases.

[0004] Furthermore, when the clay content in the waste slurry is high, its fluidity is poor, which means that when it is squeezed, the external pressure needs to be increased compared to waste slurry with low clay content. However, the clay content is not easy to detect, and if a large pressure is used for a long time, it will increase energy consumption. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this disclosure is to provide a continuous dewatering treatment device and method for shield tunnel waste slurry, which solves the problem that in existing technologies, the mixing of viscous substances with medium and coarse sand forms large, hard particles that easily clog the filter plates, and the filter plates need to remain stationary during the cleaning process, thus affecting the speed of continuous dewatering.

[0006] The objective of this disclosure can be achieved through the following technical solutions:

[0007] A continuous dewatering treatment device for tunnel boring machine waste slurry includes: a support frame, a cleaning mechanism, and a pressurizing component;

[0008] The upper end of the support frame is fixed with a propulsion component, and multiple pressure plates are equidistantly arranged on the upper end of the support frame. A filter plate is arranged between the multiple pressure plates. Limiting holes are provided through the inner sides of the pressure plates and the filter plates, and a material conveying pipe is slidably arranged inside the limiting holes. A sliding groove is opened on the inner side of the pressure plate. The cleaning mechanism is located on the side of the pressure plate close to the filter plate.

[0009] The cleaning mechanism includes a needle plate, a cleaning plate, and a limiting component. The needle plate is slidably connected to the inner side of the slide groove, and the cleaning plate is slidably arranged on the side of the needle plate near the filter plate. A cleaning hole adapted to the needle plate is provided through the inner side of the cleaning plate, and the limiting component is fixed on the side of the needle plate near the filter plate, and a return spring is fixed on the side of the needle plate away from the limiting component.

[0010] The needle plate has multiple rectangular slots on the side near the filter plate. The limiting component includes a slider, a connecting spring, and an insert block. Multiple sliders are slidably connected to the outside of the rectangular slots. A connecting spring is fixed between the multiple sliders. An insert block is fixed on the side of the filter plate near the needle plate.

[0011] A pressure-applying assembly is fixed between the cleaning plate and the pressure plate.

[0012] In some disclosures, the propulsion assembly includes an electrically operated telescopic rod and a pusher plate, with the electrically operated telescopic rod fixed to the side of the pressure plate away from the filter plate, and the pusher plate fixed to the output end of the electrically operated telescopic rod.

[0013] In some disclosures, water outlets are fixed on both sides of the filter plate, and a water collection tank is fixed directly below the water outlets.

[0014] In some disclosures, a baffle is fixed to the inner side of the pressure plate, and fixing blocks are fixed to both sides of the slide groove. The pressurizing assembly includes a U-shaped cylinder, a first piston rod, a support plate, and a second piston rod. The U-shaped cylinder is fixed to the inner side of the fixing block, and the first piston rod and the second piston rod are sealed to both ends of the U-shaped cylinder. The support plate is fixed to the end of the first piston rod away from the U-shaped cylinder, and the end of the second piston rod away from the U-shaped cylinder is in contact with the inner wall of the cleaning plate.

[0015] In some disclosures, the baffle is located at the edge of the chute, and the movement path of the needle plate is between the chute and the baffle.

[0016] In some disclosures, sealing rings are fixed to the side of the first piston rod and the second piston rod away from the filter plate.

[0017] In some disclosures, the cross-section of the fixing block is triangular, and the two right-angled sides of the triangle are respectively attached to the inner wall of the slide groove, and the support plate is provided with a protrusion adapted to the fixing block on the side near the slide groove.

[0018] In some disclosures, connecting blocks are symmetrically arranged on both sides of the pressure plate and the filter plate, and a connecting rope is fixed between the pressure plate and the filter plate.

[0019] A method for continuous dewatering treatment of tunnel boring machine waste slurry includes the following steps:

[0020] S1. When in use, start the electric telescopic rod. The electric telescopic rod will drive the push plate and pressure plate to move to the end away from the electric telescopic rod.

[0021] S2. The needle plate is supported by the return spring, causing the needle-piercing part of the needle plate to protrude from the cleaning plate. As the gap between the pressure plate and the filter plate decreases, the needle plate penetrates the filter plate, thereby cleaning the filter plate.

[0022] S3. As the pressure between the pressure plate and the filter plate increases, the insert on the filter plate is inserted between the two sliders and pushes the needle plate to slide inward along the groove, so that the needle plate's piercing part passes through the inside of the cleaning plate, thereby scraping and cleaning the sticky substances on the surface of the needle plate, thus enabling the needle plate to self-clean after unclogging the filter plate.

[0023] S4. Simultaneously, the side wall of the pressure plate contacts the support plate, and then drives the first piston rod to move closer to the pressure plate, thereby squeezing the hydraulic oil inside the U-shaped cylinder to flow closer to the second piston rod, thereby driving the second piston rod to slide away from the U-shaped cylinder, and driving the cleaning plate to move closer to the filter plate, thereby reducing the distance between the filter plate and the cleaning plate, thereby increasing the pressure on the filter cake.

[0024] S5. As the filter cake thickens, the pressure plate separates from the support plate. At this time, the cleaning plate is squeezed by the filter cake and slides inward along the chute until it fits with the baffle. This causes the second piston rod to contract inward, which in turn causes the hydraulic oil to push the first piston rod and the support plate outward. The liquid in the waste liquid flows outward along the outlets on both sides of the pressure plate into the collection tank. The solid part in the waste liquid is squeezed into a filter cake by the pressure plate and the filter plate. After the pressure plate and the filter plate separate, the filter cake falls directly downward due to gravity.

[0025] S6. Then the electric telescopic rod is pushed forward again, so that the waste slurry can be cleaned and dredged while continuously dewatering.

[0026] The explanations of the nouns, conjunctions, or adjectives used in the above technical solutions are as follows:

[0027] A fixed connection refers to a connection in which parts or components are fixed in place and there is no relative movement between them;

[0028] A rotating connection is a connection between parts that allows the parts to rotate relative to each other.

[0029] Threaded connections are a type of detachable fixed connection with advantages such as simple structure, reliable connection, and convenient assembly and disassembly. They are widely used in mechanical engineering and connection structure fields.

[0030] A sliding connection is a connection between parts that allows the parts to slide against each other.

[0031] The beneficial effects of this disclosure are:

[0032] 1. By setting a cleaning mechanism between the pressure plate and the filter plate, the pressure of the pressure plate on the filter plate causes the needle plate to penetrate into the inner side of the filter plate and unclog the stubborn dirt on the filter plate, which is composed of highly sticky particles and coarse and hard particles. Compared with the flexible material of the brush, it can improve the unclogging force. At the same time, since the pressure of the pressure plate on the filter plate drives the needle plate to clean, the filter plate can be unclogging multiple times during the continuous dewatering process without stopping the machine.

[0033] 2. Pressurizing components are installed on both sides of the cleaning mechanism. In the early stage of dewatering, or by using the pressurizing components to push the cleaning plate and reduce the distance between the filter plate and the cleaning plate, the pressure on the filter cake can be increased, which can facilitate the increase of water output speed in the early stage or when squeezing the waste slurry with high viscosity. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is an exploded structural diagram of the cleaning mechanism according to an embodiment of the present disclosure;

[0036] Figure 2 This is a schematic diagram of the overall structure of an embodiment of this disclosure;

[0037] Figure 3 This is a schematic diagram of the overall structure of the pressure plate and filter plate according to an embodiment of the present disclosure;

[0038] Figure 4 This is a schematic diagram of the overall structure of the pressure plate and cleaning plate according to an embodiment of the present disclosure;

[0039] Figure 5 This is a schematic diagram of the overall structure of the pressurization component according to an embodiment of the present disclosure.

[0040] Figure 6 This is a schematic front view of the pressure plate according to an embodiment of the present disclosure;

[0041] Figure 7 This is an embodiment of the present disclosure. Figure 6 A schematic diagram of the AA cross section.

[0042] In the diagram: 1. Support frame; 2. Feed pipe; 3. Pressure plate; 31. Water outlet; 32. Slide groove; 33. Baffle; 34. Fixing block; 301. U-shaped cylinder; 302. First piston rod; 303. Support plate; 304. Second piston rod; 321. Sealing ring; 331. Protrusion; 4. Filter plate; 5. Propulsion assembly; 501. Electric telescopic rod; 502. Push plate; 6. Limiting hole; 7. Needle plate; 71. Rectangular groove; 701. Slider; 702. Connecting spring; 703. Insertion block; 8. Cleaning plate; 81. Cleaning hole; 9. Return spring; 10. Connecting block; 11. Connecting rope; 12. Water collection tank. Detailed Implementation

[0043] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0044] Based on the concept of this application, combined with Figures 1 to 7 This document describes an embodiment of a continuous dewatering treatment device and method for tunnel boring machine (TBM) waste slurry. Specifically, the continuous dewatering treatment device is constructed as a split structure, comprising three components: a support frame 1, a cleaning mechanism, and a pressurizing assembly. A cleaning mechanism is provided between a pressure plate 3 and a filter plate 4. The pressure of the pressure plate 3 on the filter plate 4 causes needle plates 7 to penetrate the inner side of the filter plate 4, thus clearing stubborn dirt on the filter plate 4 formed by the adhesion of highly viscous particles and coarse, hard particles. Compared to the flexible material of a brush, the rigid material of the needle plates 7 enhances the clearing force. Furthermore, because the pressure of the pressure plate 3 drives the needle plates 7 to clean, the filter plate can be cleared multiple times during continuous dewatering without stopping the machine.

[0045] Please refer to Figures 1 to 7 A continuous dewatering treatment device for tunnel boring machine waste slurry includes a support frame 1, a cleaning mechanism and a pressurizing component;

[0046] The upper end of the support frame 1 is fixed with a push assembly 5, and multiple pressure plates 3 are equidistantly arranged on the upper end of the support frame 1. Filter plates 4 are arranged between the multiple pressure plates 3. Limiting holes 6 are provided through the inner sides of the pressure plates 3 and the filter plates 4, and a conveying pipe 2 is slidably arranged inside the limiting holes 6. A sliding groove 32 is opened on the inner side of the pressure plate 3. The cleaning mechanism is located on the side of the pressure plate 3 close to the filter plate 4.

[0047] The cleaning mechanism includes a needle plate 7, a cleaning plate 8, and a limiting component. The needle plate 7 is slidably connected to the inner side of the slide groove 32, and the cleaning plate 8 is slidably arranged on the side of the needle plate 7 near the filter plate 4. A cleaning hole 81 adapted to the needle plate 7 is provided through the inner side of the cleaning plate 8, and the limiting component is fixed on the side of the needle plate 7 near the filter plate 4, and a return spring 9 is fixed on the side of the needle plate 7 away from the limiting component.

[0048] A pressure assembly is fixed between the cleaning plate 8 and the pressure plate 3.

[0049] During operation, the waste slurry generated by the tunnel boring machine (TBM) is transported through the conveying pipe 2 to the space between the filter plate 4 and the pressure plate 3. The liquid portion passes through the filter plate 4 and flows out from the outlet 31, while the solid portion remains between the filter plate 4 and the pressure plate 3, forming a filter cake. Then, the propulsion assembly 5 applies pressure to the pressure plate 3, causing the multiple pressure plates 3, the filter cake, and the filter plate 4 to compress each other. Under pressure, the water in the filter cake is further squeezed out and flows out through the filter plate 4, while the solid particles are further compressed, forming a drier filter cake, thus achieving solid-liquid separation of the TBM waste slurry. However, some highly viscous particles and coarse, hard particles adhere to each other and become stuck in the filter holes of the filter plate 4 under the pressure of the pressure plate 3. At this point, without stopping the machine, during the next propulsion, the needle plate 7 penetrates the cleaning plate 8 and inserts into the filter plate 4 to clear the blockage. Because the needle plate 7 is made of rigid material, compared to the flexible material of a brush, it is easier to pierce the sticky blockage and clear it when penetrating the filter plate 4. Then, when the pressure plate 3 separates from the filter plate 4, the filter cake falls downwards due to gravity. Some sticky particles adhere to the needle plate 7. When the pressure plate 3 squeezes the filter plate 4 again, the needle plate 7 slides inward along the slide groove 32 through the limiting component. Since the needles on the needle plate 7 always penetrate the cleaning holes 81 on the cleaning plate 8, the cleaning holes 81 limit the needle plate 7 during the sliding process of the needles in the cleaning holes 81. During the sliding process of the needle plate 7 on the inner side of the cleaning plate 8, the impurities on the outside of the needle plate 7 are removed to the side of the cleaning plate 8 close to the pressure plate 3. The sticky particles are fused with the waste slurry to be processed later and incorporated into the new filter cake. This allows the filter plate 4 to be cleaned without stopping after each time the pressure plate 3 squeezes the filter plate 4 for filtration. Before unclogging the filter plate 4, the needle plate 7 is self-cleaned to prevent it from not being able to accurately penetrate the filter plate 4 due to the adsorption of impurities on its outside during unclogging. This would prevent the needle plate 7 from bending due to the pressure of the pressure plate 3, thus affecting the unclogging effect.

[0050] The needle plate 7 has multiple rectangular slots 71 on the side near the filter plate 4. The limiting component includes a slider 701, a connecting spring 702 and an insert block 703. Multiple sliders 701 are slidably connected to the outside of the rectangular slots 71. A connecting spring 702 is fixed between the multiple sliders 701. An insert block 703 is fixed on the side of the filter plate 4 near the needle plate 7.

[0051] When the return spring 9 is in its original length state, the outer wall of the needle plate 7 is in contact with the inner wall of the cleaning plate 8, and the position of the insert block 703 is between the two sliders 701. When the pressure plate 3 moves closer to the filter plate 4, the needles on the needle plate 7 first insert into the filter holes of the filter plate 4. As the pressure plate 3 presses against the filter plate 4, the insert block 703 is inserted between the two sliders 701, thereby driving the two sliders 701 to slide to both sides along the rectangular groove 71. Using the elastic deformation force of the connecting spring 702, the insert block 703 is clamped between the two sliders 701 until the needle... Plate 7 moves inward along the slide groove 32 and compresses the return spring 9, so that the side of the needle plate 7 away from the filter plate 4 is in contact with the pressure plate 3, thereby cleaning the needle part on the needle plate 7. Then, when the pressure plate 3 slides away from the filter plate 4, the clamping force of the slider 701 and the insert 703 and the elastic restoring force of the return spring 9 are used to drive the needle part of the needle plate 7 through the cleaning plate 8, so that the needle part of the needle plate 7 can penetrate the filter hole of the filter plate 4 first during the next cleaning, thereby realizing the automatic reset of the needle plate 7 during the continuous dehydration process.

[0052] The propulsion assembly 5 includes an electric telescopic rod 501 and a push plate 502. The electric telescopic rod 501 is fixed on the side of the pressure plate 3 away from the filter plate 4, and the push plate 502 is fixed at the output end of the electric telescopic rod 501.

[0053] The electric telescopic rod 501 drives the push plate 502, the pressure plate 3, and the filter plate 4 to move laterally, thereby squeezing the waste liquid between the pressure plate 3 and the filter plate 4, thus separating the solids and liquids in the waste liquid. The push plate 502 can increase the force-bearing area of ​​the pressure plate 3, thereby improving the sliding stability of the pressure plate 3.

[0054] The filter plate 4 has outlets 31 fixed on both sides, and a collection tank 12 is fixed directly below the outlets 31. When the liquid in the waste liquid is squeezed out, the liquid flows along the inner wall of the pressure plate 3 to the outlet 31 and flows out from the outlet 31 into the collection tank 12, thus facilitating the collection of the liquid.

[0055] A baffle 33 is fixed to the inner side of the pressure plate 3, and fixing blocks 34 are fixed to both sides of the slide groove 32. The pressurizing assembly includes a U-shaped cylinder 301, a first piston rod 302, a support plate 303, and a second piston rod 304. The U-shaped cylinder 301 is fixed to the inner side of the fixing block 34, and the first piston rod 302 and the second piston rod 304 are sealed to both ends of the U-shaped cylinder 301. The support plate 303 is fixed to the end of the first piston rod 302 away from the U-shaped cylinder 301, and the end of the second piston rod 304 away from the U-shaped cylinder 301 is in contact with the inner wall of the cleaning plate 8.

[0056] The baffle 33 is located at the edge of the slide 32, and the moving path of the needle plate 7 is between the slide 32 and the baffle 33.

[0057] The baffle 33 can limit the outward movement of the needle plate 7 and also restrict the cleaning plate 8 when the pressure plate 3 squeezes the cleaning plate 8, which helps to improve the stability of the cleaning plate 8 during the squeezing process.

[0058] A sealing ring 321 is fixed on the side of the first piston rod 302 and the second piston rod 304 away from the filter plate 4;

[0059] When there is little solid material between the filter plate 4 and the pressure plate 3 in the initial stage of filter pressing, or when the waste slurry is highly viscous, it has poor fluidity and requires more force to push the liquid through the filter cloth. At this time, during the process of the pressure plate 3 squeezing the filter plate 4, the first piston rod 302 and the support plate 303 protrude from the side of the cleaning plate 8. When the pressure plate 3 approaches the filter plate 4, it first contacts the support plate 303, and then drives the first piston rod 302 to move closer to the pressure plate 3. This causes the hydraulic oil inside the U-shaped cylinder 301 to flow closer to the second piston rod 304, which in turn causes the second piston rod 304 to slide away from the U-shaped cylinder 301. This also causes the cleaning plate 8 to move closer to the filter plate 4, thereby reducing the distance between the filter plate 4 and the cleaning plate 8. When the propulsion assembly 5 has the same propulsion distance, reducing the distance between the filter plate 4 and the cleaning plate 8 by using the pressurizing assembly can increase the pressure on the filter cake, which is convenient for increasing the water output speed in the initial stage or when squeezing waste slurry with high viscosity. As the filter cake thickens, the pressure plate 3 separates from the support plate 303. At this time, the cleaning plate 8 is squeezed by the filter cake and slides inward along the slide groove 32 until it fits against the baffle 33. This causes the second piston rod 304 to contract inward, which causes the hydraulic oil to push the first piston rod 302 and the support plate 303 outward.

[0060] The cross-section of the fixing block 34 is triangular, and the two right-angled sides of the triangle are respectively attached to the inner wall of the slide groove 32. The support plate 303 is provided with a protrusion 331 that is adapted to the fixing block 34 on the side near the slide groove 32.

[0061] When the support plate 303 slides towards the side closer to the fixed block 34, the surface of the protrusion 331 fits against the inclined surface of the fixed block 34, causing the sticky material remaining on the fixed block 34 to slide off the fixed block 34 under the pressure of the support plate 303 and the protrusion 331. This prevents a large amount of sticky material from clogging around the first piston rod 302 and hindering the subsequent sliding of the first piston rod 302.

[0062] Connecting blocks 10 are symmetrically arranged on both sides of the pressure plate 3 and the filter plate 4, and connecting ropes 11 are fixed between the pressure plate 3 and the filter plate 4.

[0063] When the electric telescopic rod 501 drives the push plate 502 to retract inward, the push plate 502 drives the pressure plate 3 to slide away from the filter plate 4. The connecting rope 11 between the pressure plate 3 and the filter plate 4 drives multiple pressure plates 3 and filter plates 4 to slide outward in sequence until the filter cake between multiple pressure plates 3 and filter plates 4 falls off, thus achieving automatic falling. When the electric telescopic rod 501 pushes forward again, it drives the pressure plate 3 and filter plate 4 to squeeze each other again, thus enabling multiple continuous squeezing.

[0064] A method for continuous dewatering treatment of tunnel boring machine (TBM) waste slurry, using the aforementioned continuous dewatering treatment device for TBM waste slurry, includes the following steps:

[0065] S1. When in use, start the electric telescopic rod 501. The electric telescopic rod 501 drives the push plate 502 and the pressure plate 3 to move away from the end of the electric telescopic rod 501.

[0066] S2. The needle plate 7 is supported by the return spring 9, causing the needle-piercing part of the needle plate 7 to protrude from the cleaning plate 8. As the gap between the pressure plate 3 and the filter plate 4 decreases, the needle plate 7 penetrates the filter plate 4, thereby cleaning the filter plate 4.

[0067] S3. As the pressure between the pressure plate 3 and the filter plate 4 increases, the insert block 703 on the filter plate 4 is inserted between the two sliders 701 and pushes the needle plate 7 to slide inward along the slide groove 32, so that the needle part of the needle plate 7 passes through the inner side of the cleaning plate 8, thereby scraping and cleaning the sticky substances on the surface of the needle plate 7, thus enabling the needle plate 7 to self-clean after unclogging the filter plate 4.

[0068] S4. Simultaneously, the side wall of the pressure plate 3 contacts the support plate 303, and then drives the first piston rod 302 to move closer to the pressure plate 3, thereby squeezing the hydraulic oil inside the U-shaped cylinder 301 to flow closer to the second piston rod 304, thereby driving the second piston rod 304 to slide away from the U-shaped cylinder 301, and driving the cleaning plate 8 to move closer to the filter plate 4, thereby reducing the distance between the filter plate 4 and the cleaning plate 8, thereby increasing the pressure on the filter cake.

[0069] S5. As the filter cake thickens, the pressure plate 3 separates from the support plate 303. At this time, the cleaning plate 8 is squeezed by the filter cake and slides inward along the slide groove 32 until it fits against the baffle 33. This causes the second piston rod 304 to contract inward, which in turn causes the hydraulic oil to push the first piston rod 302 and the support plate 303 outward. The liquid in the waste liquid flows outward along the outlets 31 on both sides of the pressure plate 3 into the water collection tank 12. The solid part in the waste liquid is squeezed into a filter cake by the pressure plate 3 and the filter plate 4. After the pressure plate 3 separates from the filter plate 4, it falls directly downward due to gravity.

[0070] S6. Then the electric telescopic rod 501 is pushed forward again, so that the waste slurry can be cleaned and dredged while continuously dewatering.

[0071] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0072] The foregoing has shown and described the basic principles, main features, and advantages of this disclosure. Those skilled in the art should understand that this disclosure is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this disclosure. Various changes and modifications can be made to this disclosure without departing from its spirit and scope, and all such changes and modifications fall within the scope of this disclosure as claimed.

Claims

1. A continuous dewatering treatment device for tunnel boring machine waste slurry, characterized in that, include: Support frame (1), cleaning mechanism and pressurization assembly; The upper end of the support frame (1) is fixed with a propulsion component (5), and multiple pressure plates (3) are equidistantly arranged on the upper end of the support frame (1). A filter plate (4) is arranged between the multiple pressure plates (3). A limit hole (6) is provided through the inner side of the pressure plate (3) and the filter plate (4), and a conveying pipe (2) is slidably arranged on the inner side of the limit hole (6). A sliding groove (32) is opened on the inner side of the pressure plate (3). The cleaning mechanism is located on the side of the pressure plate (3) close to the filter plate (4). The cleaning mechanism includes a needle plate (7), a cleaning plate (8), and a limiting component. The needle plate (7) is slidably connected to the inner side of the slide groove (32), and the cleaning plate (8) is slidably disposed on the side of the needle plate (7) near the filter plate (4). A cleaning hole (81) adapted to the needle plate (7) is provided through the inner side of the cleaning plate (8), and a limiting component is fixed on the side of the needle plate (7) near the filter plate (4). A return spring (9) is fixed on the side of the needle plate (7) away from the limiting component. The needle plate (7) has multiple rectangular slots (71) on the side near the filter plate (4). The limiting component includes a slider (701), a connecting spring (702), and an insert (703). Multiple sliders (701) are slidably connected to the outside of the rectangular slots (71). A connecting spring (702) is fixed between the multiple sliders (701). An insert (703) is fixed on the side of the filter plate (4) near the needle plate (7). A pressure assembly is fixed between the cleaning plate (8) and the pressure plate (3).

2. The continuous dewatering treatment device for shield tunnel waste slurry according to claim 1, characterized in that, The propulsion assembly (5) includes an electric telescopic rod (501) and a push plate (502), and the electric telescopic rod (501) is fixed on the side of the pressure plate (3) away from the filter plate (4), and the push plate (502) is fixed at the output end of the electric telescopic rod (501).

3. The continuous dewatering treatment device for shield tunnel waste slurry according to claim 2, characterized in that, The filter plate (4) has water outlets (31) fixed on both sides, and a water collection tank (12) is fixed directly below the water outlets (31).

4. The continuous dewatering treatment device for shield tunnel waste slurry according to claim 3, characterized in that, A baffle (33) is fixed to the inner side of the pressure plate (3), and a fixing block (34) is fixed to both sides of the slide groove (32). The pressurizing assembly includes a U-shaped cylinder (301), a first piston rod (302), a support plate (303), and a second piston rod (304). The U-shaped cylinder (301) is fixed to the inner side of the fixing block (34), and the first piston rod (302) and the second piston rod (304) are sealed and fitted at both ends of the U-shaped cylinder (301). The first piston rod (302) is fixed to the support plate (303) at one end away from the U-shaped cylinder (301), and the second piston rod (304) is attached to the inner wall of the cleaning plate (8) at one end away from the U-shaped cylinder (301).

5. A continuous dewatering treatment device for shield tunnel waste slurry according to claim 4, characterized in that, The baffle (33) is located at the edge of the groove (32), and the moving path of the needle plate (7) is between the groove (32) and the baffle (33).

6. The continuous dewatering treatment device for shield tunnel waste slurry according to claim 5, characterized in that, A sealing ring (321) is fixed on the side of the first piston rod (302) and the second piston rod (304) away from the filter plate (4).

7. A continuous dewatering treatment device for shield tunnel waste slurry according to claim 6, characterized in that, The cross-section of the fixing block (34) is triangular, and the two right-angled sides of the triangle are respectively attached to the inner wall of the slide (32). The support plate (303) has a protrusion (331) that is adapted to the fixing block (34) on the side near the slide (32).

8. The continuous dewatering treatment device for shield tunnel waste slurry according to claim 7, characterized in that, Connecting blocks (10) are symmetrically arranged on both sides of the pressure plate (3) and the filter plate (4), and a connecting rope (11) is fixed between the pressure plate (3) and the filter plate (4).

9. A method for continuous dewatering treatment of tunnel boring machine (TBM) waste slurry, using the TBM waste slurry continuous dewatering treatment device described in claim 8, characterized in that, Includes the following steps: S1. When in use, start the electric telescopic rod (501). The electric telescopic rod (501) drives the push plate (502) and the pressure plate (3) to move away from the electric telescopic rod (501). S2. The needle plate (7) is supported by the return spring (9), causing the needle-piercing part of the needle plate (7) to protrude from the cleaning plate (8). As the gap between the pressure plate (3) and the filter plate (4) decreases, the needle plate (7) penetrates the filter plate (4), thereby cleaning the filter plate (4). S3. As the pressure between the pressure plate (3) and the filter plate (4) increases, the insert (703) on the filter plate (4) is inserted between the two sliders (701) and pushes the needle plate (7) to slide inward along the groove (32), so that the needle part of the needle plate (7) passes through the inner side of the cleaning plate (8), thereby scraping and cleaning the sticky substances on the surface of the needle plate (7), so that the needle plate (7) can be self-cleaned after the filter plate (4) is unblocked. S4. At the same time, the side wall of the pressure plate (3) contacts the support plate (303), and then drives the first piston rod (302) to move closer to the pressure plate (3), thereby squeezing the hydraulic oil inside the U-shaped cylinder (301) to flow closer to the second piston rod (304), thereby driving the second piston rod (304) to slide away from the U-shaped cylinder (301), and driving the cleaning plate (8) to move closer to the filter plate (4), thereby reducing the distance between the filter plate (4) and the cleaning plate (8), thereby increasing the pressure on the filter cake; S5. As the filter cake thickens, the pressure plate (3) separates from the support plate (303). At this time, the cleaning plate (8) is squeezed by the filter cake and slides inward along the slide groove (32) until it fits against the baffle (33). This causes the second piston rod (304) to contract inward, so that the hydraulic oil pushes the first piston rod (302) and the support plate (303) to slide outward. The liquid in the waste liquid flows outward along the outlets (31) on both sides of the pressure plate (3) into the water collection tank (12). The solid part in the waste liquid is squeezed into a filter cake by the pressure plate (3) and the filter plate (4). After the pressure plate (3) and the filter plate (4) separate, the filter cake falls directly downward due to gravity. S6. Then the electric telescopic rod (501) is pushed forward again, so that the waste slurry can be cleaned and cleared while continuously dewatered.

Images