Continuous dehydration treatment device and method for shield waste slurry

Abstract

The invention belongs to the field of shield waste slurry continuous dehydration, and discloses a shield waste slurry continuous dehydration treatment device and method.The shield waste slurry continuous dehydration treatment device comprises a supporting frame, a cleaning mechanism and a pressurizing assembly; a pushing assembly is fixed to the upper end of the supporting frame, a plurality of pressing plates are arranged at the upper end of the supporting frame at equal intervals, filter plates are arranged among the pressing plates, and sliding grooves are formed in the inner sides of the pressing plates; 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; a pressing 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 is utilized to enable the needle plate to penetrate into the inner side of the filter plate, stubborn dirt bonded by high-viscosity particles and coarse and hard particles on the filter plate is dredged, compared with a brush made of a flexible material, the dredging strength can be improved, and the dredging efficiency is improved. Meanwhile, the needle plate is driven to clean by utilizing the extrusion force of the pressing plate on the filter plate, so that the filter plate can be dredged for multiple times in the non-stop continuous dehydration process.

Description

Technical Field

[0001] The present invention belongs to the field of continuous dehydration of shield waste slurry, and particularly relates to a device and method for continuous dehydration of shield waste slurry. Background Art

[0002] The treatment of shield waste slurry involves issues of environmental protection and resource recycling. With the improvement of environmental protection requirements and the improvement of slag management standards, solid-liquid separation of the mud and water parts in the waste slurry can reduce the overall cost and maximize the project management benefits compared to the traditional direct transportation of abandoned slurry.

[0003] The shield waste slurry dewatering treatment method is through plate and frame filter pressing. By applying external pressure to the waste slurry, the solid particles in the liquid medium are separated, thereby achieving solid-liquid separation. When dealing with complex strata, such as the composite strata on the underground excavation section, there are not only silty clay, but also geological conditions such as fine sand, medium-coarse sand or weathered rock. The silty clay and medium-coarse sand are mixed to form large particles with harder materials, which are easy to clog the filter plate. Traditional cleaning devices mostly use vibrators or cleaning brushes to shake off the blockages, and the sticky particles and coarse and hard particles are tightly bonded and difficult to clean. When cleaning the filter plate with a brush, the filter plate is usually required to remain stopped. However, such cleaning will affect the dehydration speed of the device. If cleaning is performed after all the filtration is completed, the filter holes will be blocked too much in the later stage, and the subsequent water output efficiency will decrease with the increase in usage time.

[0004] And when the clay content in the waste slurry is high, due to its poor fluidity, it is necessary to increase the external pressure when extruding it compared with the waste slurry with a low clay content. However, the clay content is not easy to detect. If a high pressure is used for a long time, energy consumption will increase. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a continuous dehydration treatment device and method for shield waste slurry, which solves the problem in the prior art that large particles with harder material are easily blocked by the mixture of viscous substances and medium and coarse sand, and the filter plate needs to remain still during the cleaning process, thereby affecting the speed of continuous dehydration.

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

[0007] A shield waste slurry continuous dehydration treatment device, comprising: a support frame, a cleaning mechanism and a pressurizing component;

[0008] A propulsion assembly is fixed to the upper end of the support frame, and a plurality of pressing plates are equidistantly arranged at the upper end of the support frame, a filter plate is arranged between the plurality of pressing plates, limiting holes are arranged through the inner sides of the pressing plates and the filter plates, and a feed pipe is slidably arranged inside the limiting holes, a slide groove is provided inside the pressing plate, and the cleaning mechanism is located on a side of the pressing plate close to the filter plate;

[0009] The cleaning mechanism comprises a needle plate, a cleaning plate and a limiting assembly, the inner side of the slide groove is slidably connected with the needle plate, and the cleaning plate is slidably arranged on the side of the needle plate close to the filter plate, the inner side of the cleaning plate is penetrated with a cleaning hole adapted to the needle plate, and the limiting assembly is fixed on the side of the needle plate close to the filter plate, and a return spring is fixed on the side of the needle plate away from the limiting assembly;

[0010] A pressurizing assembly is fixed between the cleaning plate and the pressing plate.

[0011] In some disclosures, a plurality of rectangular grooves are provided on one side of the needle plate close to the filter plate, the limiting assembly includes a slider, a connecting spring and an insert block, and a plurality of sliders are slidably connected to the outer side of the rectangular groove, connecting springs are fixed between the plurality of sliders, and an insert block is fixed on one side of the filter plate close to the needle plate.

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

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

[0014] In some disclosures, a baffle is fixed on the inner side of the pressure plate, and fixed blocks are fixed on 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, a U-shaped cylinder is fixed on the inner side of the fixed block, and both ends of the U-shaped cylinder are sealed with the first piston rod and the second piston rod, a 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 an edge of the slide slot, and the movement path of the needle plate is between the slide slot and the baffle.

[0016] In some disclosures, a sealing ring is fixed to a 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 a triangle, and the two right-angled sides of the triangle are respectively fitted with the inner walls of the slide groove, and a protrusion adapted to the fixing block is provided on one side of the support plate close to the slide groove.

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

[0019] A method for continuously dehydrating shield waste slurry, comprising the following steps:

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

[0021] S2. The needle plate is supported by the return spring so that the puncture part of the needle plate protrudes from the cleaning plate. As the gap between the pressure plate and the filter plate decreases, the needle plate penetrates the filter plate, thereby clearing and cleaning the filter plate.

[0022] S3. As the pressure between the pressure plate and the filter plate increases, the insert block on the pressure plate is inserted between the two sliders and pushes the needle plate to slide inward along the slide groove, so that the puncture part of the needle plate passes along the inner side of the cleaning plate, thereby scraping and cleaning the sticky substances on the surface of the needle plate, so that the needle plate can be self-cleaned after the filter plate is unblocked.

[0023] S4. At the same time, the side wall of the pressure plate contacts the support plate, and then drives the first piston rod to move toward the side close to the pressure plate, thereby squeezing the hydraulic oil inside the U-shaped cylinder to flow toward the side close to the second piston rod, thereby driving the second piston rod to slide toward the end away from the U-shaped cylinder, and driving the cleaning plate to move toward the side close 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 slides inward along the slide groove under the pressure of the filter cake until it fits with the baffle, and drives the second piston rod to contract inward, so that the hydraulic oil pushes the first piston rod and the support plate to slide outward, and the liquid in the waste liquid flows outward along the water outlets on both sides of the pressure plate into the sump, while the solid part in the waste liquid is squeezed into a filter cake by the pressure plate and the filter plate, and falls directly downward under the influence of gravity after the pressure plate is separated from the filter plate.

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

[0026] The nouns, conjunctions or adjectives involved in the above technical solution are explained as follows:

[0027] A fixed connection is one where the parts or components are fixed without any relative movement;

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

[0029] Threaded connection is a detachable fixed connection with the advantages of simple structure, reliable connection, and convenient assembly and disassembly. It is widely used in the fields of mechanical engineering and connection structures.

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

[0031] Beneficial effects of the present disclosure:

[0032] 1. A cleaning mechanism is provided between the pressing plate and the filter plate, and the pressure of the pressing plate on the filter plate is used to make the needle plate penetrate into the inner side of the filter plate, and to dredge the stubborn dirt on the filter plate which is adhered by the high viscosity particles and the coarse and hard particles. Compared with the flexible material of the brush, the dredging force can be improved. At the same time, the squeezing force of the pressing plate on the filter plate drives the needle plate to clean, so that the filter plate can be dredged multiple times during the continuous dehydration process without stopping the machine.

[0033] 2. Pressurizing components are arranged on both sides of the cleaning mechanism, which can increase the pressure on the filter cake in the early stage of dehydration or by using the pressurizing components to push the cleaning plate and reduce the distance between the filter plate and the cleaning plate, so as to increase the water outlet speed in the early stage or when squeezing waste slurry with high viscosity. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 is a schematic diagram of the explosion structure of the cleaning mechanism of an embodiment of the present disclosure;

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

[0037] Figure 3 is a schematic diagram of the overall structure of the pressing plate and the filter plate of the embodiment of the present disclosure;

[0038] Figure 4 is a schematic diagram of the overall structure of the pressing plate and the cleaning plate in the embodiment of the present disclosure;

[0039] Figure 5 This is a schematic diagram of the overall structure of the pressurized component of the embodiment of the present disclosure.

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

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

[0042] In the figure: 1. support frame; 2. feed pipe; 3. pressure plate; 31. water outlet; 32. slide; 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. limit hole; 7. needle plate; 71. rectangular groove; 701. slider; 702. connecting spring; 703. plug block; 8. cleaning plate; 81. cleaning hole; 9. reset spring; 10. connecting block; 11. connecting rope; 12. water collecting tank. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0044] According to the concept of this application, Figures 1 to 7 An embodiment of a shield waste slurry continuous dewatering treatment device and method is described. Specifically, the shield waste slurry continuous dewatering treatment device is constructed as a split structure, which has three components, namely a support frame 1, a cleaning mechanism and a pressurizing assembly. By arranging a cleaning mechanism between the pressing plate 3 and the filter plate 4, the pressure of the pressing plate 3 on the filter plate 4 is used to make the needle plate 7 penetrate into the inner side of the filter plate 4, and dredge the stubborn dirt on the filter plate 4 which is formed by the adhesion of high-viscosity particles and coarse and hard particles. Compared with the flexible material of the brush, the rigid material of the needle plate 7 can improve the dredging force. At the same time, since the squeezing force of the pressing plate 3 on the filter plate 4 drives the needle plate 7 to clean, the filter plate can be dredged multiple times during the continuous dehydration process without stopping the machine.

[0045] Please refer to Figures 1 to 7 , a shield waste slurry continuous dewatering treatment device, comprising a support frame 1, a cleaning mechanism and a pressurizing component;

[0046] A propulsion assembly 5 is fixed to the upper end of the support frame 1, and a plurality of pressing plates 3 are equidistantly arranged at the upper end of the support frame 1, a filter plate 4 is arranged between the plurality of pressing plates 3, a limiting hole 6 is penetrated through the inner side of the pressing plate 3 and the filter plate 4, and a feed pipe 2 is slidably arranged inside the limiting hole 6, a slide groove 32 is opened inside the pressing plate 3, and a cleaning mechanism is located on the side of the pressing plate 3 close to the filter plate 4;

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

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

[0049] When in use, the waste slurry generated by the shield is transmitted to between the filter plate 4 and the pressure plate 3 by the feed pipe 2, and the liquid part passes through the filter plate 4 and flows out from the water outlet 31, while the solid part is retained between the filter plate 4 and the pressure plate 3 to form a filter cake, and then the pressing plate 3 is pressed by the propulsion component 5, so that multiple pressing plates 3, filter cakes and filter plates 4 are squeezed against each other. Under the action of pressure, the moisture in the filter cake is further squeezed out and flows out through the filter plate 4, while the solid particles are further compressed to form a relatively dry filter cake, thereby performing solid-liquid separation on the shield waste slurry. However, some particles with higher viscosity are bonded to the coarse and hard particles, and are stuck on the filter holes of the filter plate 4 under the squeezing of the pressure plate 3. At this time, without stopping the machine, at the next propulsion, the needle plate 7 is inserted into the filter plate 4 through the cleaning plate 8, thereby clearing the blockage stuck in the filter plate 4. Since the needle plate 7 is made of rigid material, it is easier to pierce the viscous blockage and clear it when passing through the filter plate 4 compared with the flexible material of the brush. When the filter plate 4 is pressed again by the pressing plate 3, the filter cake falls downward under the influence of gravity, and some sticky particles are stuck on the needle plate 7. When the pressing plate 3 presses the filter plate 4 again, the needle plate 7 is driven to slide inward along the slide groove 32 through the limiting component. Since the needle punctures on the needle plate 7 always penetrate the cleaning holes 81 on the cleaning plate 8 at this time, the cleaning holes 81 limit the needle plate 7 during the sliding process of the needle punctures in the cleaning holes 81. The impurities on the outside of the needle plate 7 are removed to the side of the cleaning plate 8 close to the pressing plate 3 during the sliding process of the needle plate 7 on the inner side of the cleaning plate 8, and the sticky particles are fused with the waste slurry to be subsequently processed and integrated into the new filter cake. After each time the pressing plate 3 presses the filter plate 4 for filtering, the filter plate 4 can be cleaned without stopping the machine, and before the filter plate 4 is dredged, the needle plate 7 is self-cleaned to avoid the impurities adsorbed on its outside during dredging and failing to accurately penetrate the filter plate 4, thereby causing the needle plate 7 to be squeezed by the pressing plate 3 and bent, thereby affecting the dredging effect.

[0050] A plurality of rectangular grooves 71 are provided on one side of the needle plate 7 close to the filter plate 4, and the limiting assembly includes a slider 701, a connecting spring 702 and an insert block 703, and a plurality of sliders 701 are slidably connected to the outer side of the rectangular groove 71, and a connecting spring 702 is fixed between the plurality of sliders 701, and an insert block 703 is fixed on one side of the filter plate 4 close to the needle plate 7;

[0051] When the return spring 9 is in the original length state, the outer wall of the needle plate 7 fits with the inner wall of the cleaning plate 8, and the position of the insert block 703 is located between the two sliders 701. When the pressure plate 3 approaches the filter plate 4, the needles on the needle plate 7 are first inserted into the filter holes of the filter plate 4. As the pressure plate 3 presses 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, and 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 is closed. The plate 7 moves inward along the slide groove 32 and compresses the reset spring 9, so that the side of the needle plate 7 away from the filter plate 4 fits with the pressing plate 3, so as to clean the puncture part on the needle plate 7. Then, when the pressing plate 3 slides to the side away from the filter plate 4, the clamping force of the slider 701 and the plug 703 and the elastic restoring force of the reset spring 9 are used to drive the puncture part of the needle plate 7 to pass through the cleaning plate 8, so that the puncture part of the needle plate 7 can penetrate the filter hole of the filter plate 4 first when cleaning next time, so that the needle plate 7 can be automatically reset in advance during the continuous dehydration process.

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

[0053] The electric telescopic rod 501 is used to drive the push plate 502, the pressing plate 3 and the filter plate 4 to move horizontally, so that the waste liquid between the pressing plate 3 and the filter plate 4 is squeezed, thereby separating the solid and liquid in the waste liquid. The push plate 502 can increase the force-bearing area of ​​the pressing plate 3, thereby improving the sliding stability of the pressing plate 3.

[0054] Water outlets 31 are fixed on both sides of the filter plate 4, and a water collecting tank 12 is fixed directly below the water outlet 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 water outlet 31, and flows out from the water outlet 31 to the water collecting tank 12, thereby facilitating the collection of the liquid part.

[0055] A baffle 33 is fixed on the inner side of the pressure plate 3, and fixed blocks 34 are fixed on 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 on the inner side of the fixed block 34, and both ends of the U-shaped cylinder 301 are sealed with the first piston rod 302 and the second piston rod 304. The end of the first piston rod 302 away from the U-shaped cylinder 301 is fixed with the support plate 303, 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 plate 33 is located at the edge of the slide slot 32 , and the moving path of the needle plate 7 is between the slide slot 32 and the baffle plate 33 .

[0057] The baffle 33 can not only limit the outward movement range of the needle plate 7, but also restrict the cleaning plate 8 when the pressing plate 3 squeezes the cleaning plate 8, which is beneficial to improve the stability of the cleaning plate 8 during the squeezing process.

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

[0059] At the beginning of filtration, there are fewer solids between the filter plate 4 and the pressing plate 3, or the waste slurry with high viscosity has poor fluidity and requires greater force to push the liquid through the filter cloth. At this time, during the process of pressing the pressing plate 3 toward 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 pressing plate 3 approaches the filter plate 4, the pressing plate 3 first contacts the supporting plate 303, and then drives the first piston rod 302 to move toward the side close to the pressing plate 3, thereby squeezing the hydraulic oil in the U-shaped oil cylinder 301 to flow toward the side close to the second piston rod 304, thereby driving the second piston rod 304 to slide toward the end away from the U-shaped oil cylinder 301, and driving the cleaning plate 8 to move toward the side close to the filter plate 4, thereby reducing the distance between the filter plate 4 and the cleaning plate 8. When the pushing distance of the pushing assembly 5 is the same, the distance between the filter plate 4 and the cleaning plate 8 is reduced by using the pressurizing assembly, which can increase the pressure on the filter cake and facilitate increasing the water outlet speed in the initial stage or when squeezing waste slurry with higher viscosity. As the filter cake thickens, the pressing plate 3 separates from the supporting plate 303. At this time, the cleaning plate 8 slides inwardly along the slide groove 32 under the squeezing of the filter cake until it fits with the baffle 33, and drives the second piston rod 304 to contract inwardly, so that the hydraulic oil pushes the first piston rod 302 and the supporting plate 303 to slide outward.

[0060] The cross section of the fixing block 34 is triangular, and the two right-angled sides of the triangle are respectively fitted with the inner wall of the slide slot 32 . A protrusion 331 adapted to the fixing block 34 is provided on one side of the support plate 303 close to the slide slot 32 .

[0061] When the support plate 303 slides toward the side close to the fixed block 34, the surface of the protrusion 331 fits against the inclined surface of the fixed block 34, so that the viscous material remaining on the fixed block 34 slides off the fixed block 34 under the pressure of the support plate 303 and the protrusion 331, thereby preventing a large amount of viscous material from being blocked 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 pressing plate 3 and the filter plate 4 , and a connecting rope 11 is fixed between the pressing 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 pressing plate 3 to slide to the side away from the filter plate 4, and the connecting rope 11 between the pressing plate 3 and the filter plate 4 drives multiple pressing plates 3 and filter plates 4 to slide outward in turn until the filter cakes between the multiple pressing plates 3 and the filter plates 4 fall off, thereby achieving automatic falling. When the electric telescopic rod 501 is pushed forward again, it drives the pressing plate 3 and the filter plate 4 to squeeze each other again, so that multiple continuous squeezing can be performed.

[0064] A method for continuous dehydration treatment of shield waste slurry, using the above-mentioned continuous dehydration treatment device for shield waste slurry, comprises the following steps:.

[0065] S1. When in use, the electric telescopic rod 501 is started, and the electric telescopic rod 501 drives the push plate 502 and the pressing plate 3 to move toward an end away from the electric telescopic rod 501.

[0066] S2. The needle plate 7 is supported by the return spring 9 so that the puncture site of the needle plate 7 protrudes from the cleaning plate 8. As the gap between the pressing plate 3 and the filter plate 4 decreases, the needle plate 7 penetrates the filter plate 4, thereby clearing and cleaning the filter plate 4.

[0067] S3. As the pressure between the pressing plate 3 and the filter plate 4 increases, the insert block 703 on the pressing plate 3 is inserted between the two sliders 701, and pushes the needle plate 7 to slide inward along the slide groove 32, so that the puncture part of the needle plate 7 passes along 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.

[0068] S4. At the same time, the side wall of the pressing plate 3 contacts the supporting plate 303, and then drives the first piston rod 302 to move toward the side close to the pressing plate 3, thereby squeezing the hydraulic oil inside the U-shaped cylinder 301 to flow toward the side close to the second piston rod 304, thereby driving the second piston rod 304 to slide toward the end away from the U-shaped cylinder 301, and driving the cleaning plate 8 to move toward the side close 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 pressing plate 3 separates from the support plate 303. At this time, the cleaning plate 8 slides inward along the slide groove 32 under the pressure of the filter cake until it fits with the baffle 33, and drives 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, and the liquid in the waste liquid flows outward along the water outlet 31 on both sides of the pressing plate 3 to the sump 12, and the solid part in the waste liquid is squeezed into a filter cake by the pressing plate 3 and the filter plate 4, and falls directly downward under the influence of gravity after the pressing plate 3 is separated from the filter plate 4.

[0070] S6. Then the electric telescopic rod 501 is pushed forward again, so that the waste pulp can be cleaned and unblocked while being continuously dehydrated.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0072] The above shows and describes the basic principles, main features and advantages of the present disclosure. Those skilled in the art should understand that the present disclosure is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present disclosure. Without departing from the spirit and scope of the present disclosure, the present disclosure may have various changes and improvements, and these changes and improvements fall within the scope of the present disclosure to be protected.

Claims

1. A shield waste slurry continuous dehydration treatment device, characterized in that: include: A support frame (1), a cleaning mechanism and a pressurizing component; A propulsion assembly (5) is fixed to the upper end of the support frame (1), and a plurality of pressure plates (3) are equidistantly arranged on the upper end of the support frame (1), a filter plate (4) is arranged between the plurality of pressure plates (3), a limiting hole (6) is provided through the inner side of the pressure plate (3) and the filter plate (4), and a feed pipe (2) is slidably provided on the inner side of the limiting hole (6), a slide groove (32) is provided on the inner side of the pressure plate (3), and the cleaning mechanism is located on a side of the pressure plate (3) close to the filter plate (4); The cleaning mechanism comprises a needle plate (7), a cleaning plate (8) and a limiting assembly, the inner side of the slide groove (32) is slidably connected with the needle plate (7), and the cleaning plate (8) is slidably arranged on the side of the needle plate (7) close to the filter plate (4), a cleaning hole (81) adapted to the needle plate (7) is penetrated through the inner side of the cleaning plate (8), and the limiting assembly is fixed on the side of the needle plate (7) close to the filter plate (4), and a return spring (9) is fixed on the side of the needle plate (7) away from the limiting assembly; A pressurizing component is fixed between the cleaning plate (8) and the pressing plate (3).

2. The shield waste slurry continuous dehydration treatment device according to claim 1 is characterized in that: A plurality of rectangular grooves (71) are provided on a side of the needle plate (7) close to the filter plate (4); the limiting assembly comprises a slider (701), a connecting spring (702) and an insert block (703); and a plurality of sliders (701) are slidably connected to the outer side of the rectangular groove (71); connecting springs (702) are fixed between the plurality of sliders (701); and an insert block (703) is fixed on a side of the filter plate (4) close to the needle plate (7).

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

4. The shield waste slurry continuous dehydration treatment device according to claim 2, characterized in that: Water outlets (31) are fixed on both sides of the filter plate (4), and a water collecting tank (12) is fixed directly below the water outlets (31).

5. The shield waste slurry continuous dehydration treatment device according to claim 3 is characterized in that: A baffle (33) is fixed on the inner side of the pressure plate (3), and fixed blocks (34) are fixed on both sides of the slide groove (32). The pressurizing assembly comprises a U-shaped oil cylinder (301), a first piston rod (302), a support plate (303) and a second piston rod (304). A U-shaped oil cylinder (301) is fixed on the inner side of the fixed block (34), and both ends of the U-shaped oil cylinder (301) are sealed with the first piston rod (302) and the second piston rod (304). The end of the first piston rod (302) away from the U-shaped oil cylinder (301) is fixed with a support plate (303), and the end of the second piston rod (304) away from the U-shaped oil cylinder (301) is in contact with the inner wall of the cleaning plate (8).

6. The shield waste slurry continuous dehydration treatment device according to claim 4, characterized in that: The baffle plate (33) is located at the edge of the slide groove (32), and the moving path of the needle plate (7) is between the slide groove (32) and the baffle plate (33).

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

8. The shield waste slurry continuous dehydration treatment device according to claim 7, characterized in that: The cross section of the fixing block (34) is triangular, and the two right-angled sides of the triangle are respectively fitted with the inner wall of the slide groove (32), and a protrusion (331) adapted to the fixing block (34) is provided on one side of the support plate (303) close to the slide groove (32).

9. The shield waste slurry continuous dehydration treatment device according to claim 1, characterized in that: Connecting blocks (10) are symmetrically arranged on both sides of the pressing plate (3) and the filter plate (4), and a connecting rope (11) is fixed between the pressing plate (3) and the filter plate (4).

10. A method for continuous dehydration treatment of shield waste slurry, using a continuous dehydration treatment device for shield waste slurry according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. When in use, the electric telescopic rod (501) is started, and the electric telescopic rod (501) drives the push plate (502) and the pressure plate (3) to move toward an end away from the electric telescopic rod (501); S2, the needle plate (7) is supported by the return spring (9) so that the puncture site of the needle plate (7) protrudes from the cleaning plate (8), and as the gap between the pressing plate (3) and the filter plate (4) decreases, the needle plate (7) penetrates the filter plate (4), thereby clearing and cleaning the filter plate (4); S3. As the pressure between the pressing plate (3) and the filter plate (4) increases, the insert block (703) on the pressing plate (3) is inserted between the two sliders (701), and pushes the needle plate (7) to slide inward along the slide groove (32), so that the puncture site of the needle plate (7) passes along 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 cleared; S4, at the same time, the side wall of the pressing plate (3) contacts the supporting plate (303), and then drives the first piston rod (302) to move toward the side close to the pressing plate (3), thereby squeezing the hydraulic oil inside the U-shaped oil cylinder (301) to flow toward the side close to the second piston rod (304), thereby driving the second piston rod (304) to slide toward the end away from the U-shaped oil cylinder (301), and driving the cleaning plate (8) to move toward the side close 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 pressing 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 with the baffle plate (33), and drives 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, and the liquid in the waste liquid flows outward along the water outlets (31) on both sides of the pressing plate (3) to the water collecting tank (12), while the solid part in the waste liquid is squeezed into a filter cake by the pressing plate (3) and the filter plate (4), and falls directly downward under the influence of gravity after the pressing plate (3) and the filter plate (4) are separated; S6. The electric telescopic rod (501) is then pushed forward again, so that the waste pulp can be cleaned and unblocked while being continuously dehydrated.

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