Shield slurry screening device

Abstract

The utility model relates to the technical field of shield slurry treatment, in particular to a shield slurry screening device. A shield slurry screening device comprises a tower body, a fine material screening assembly, a fine material conveying assembly, a coarse particle screening assembly and a medium particle screening assembly, a feeding port is formed in the top of the tower body, and the fine material screening assembly, the coarse particle screening assembly and the medium particle screening assembly are sequentially arranged in the tower body from top to bottom; a first discharge hole is formed in the bottom of the tower body; the fine material screening assembly comprises a hanging rod, a plurality of first screening plates, a plurality of first vibration modules and a plurality of sliding ways. The first screening plates are sequentially and obliquely installed on the left side wall and the right side wall of the tower body in a staggered mode from top to bottom. The screening device of the shield slurry screen is good in screening effect, low in noise and low in power, has an energy-saving effect, and solves the technical problems that an existing screening device is high in power and large in noise.

Description

Technical Field

[0001] The utility model relates to the technical field of shield mud treatment, and particularly relates to a shield mud screening device. Background Art

[0002] The shield mud contains particles with different particle sizes. Since the coarse particles in the mud have the value of recycling, the smaller particles are dehydrated and filtered into mud cakes for landfill after dehydration treatment. If the coarse particles and other waste are directly landfilled, it will also cause waste of resources and damage to the environment. Therefore, it is usually necessary to preliminarily screen the coarse and fine particles of the shield-produced mud and sludge. The particles in the mud are classified into different levels according to their sizes through particle screening. For example, the coarse particles and medium particles are separated to facilitate the subsequent dehydration of the screened fine materials. After dehydration, the fine materials are filtered to obtain mud cakes, and then the mud cakes and different levels of particulate materials obtained by screening are recycled. Existing screening devices usually need to use other equipment such as vibration motors to output power to vibrate the screen mesh. Since multiple screen meshes require multiple power output devices, the existing screening devices have high power and high noise. Content of the Utility Model

[0003] Aiming at the problems raised in the background art, the purpose of the utility model is to provide a shield mud screening device with good screening effect, low noise, low power, and energy-saving effect, which solves the technical problems of high power and high noise of the existing screening devices.

[0004] The above technical purpose of the utility model is achieved through the following technical solutions:

[0005] A shield mud screening device includes a tower body, a fine material screening component, a fine material conveying component, a coarse particle screening component, and a medium particle screening component. The top of the tower body is provided with a feed inlet. The fine material screening component, the coarse particle screening component, and the medium particle screening component are arranged in the tower body from top to bottom in sequence. The bottom of the tower body is provided with a first discharge outlet;

[0006] The fine material screening component includes suspension rods, a plurality of first sieve plates, a plurality of first vibration modules, and a plurality of slideways. The plurality of first sieve plates are inclined and installed on the left and right side walls of the tower body in an alternating manner from top to bottom. The suspension rods are arranged in the middle of the tower body. One end of the first sieve plate is rotatably connected to the inner wall of the tower body, and the other end of the first sieve plate is movably connected to the suspension rod. The first vibration modules are arranged in one-to-one correspondence with the first sieve plates. The first vibration modules are fixedly arranged on the suspension rods and are connected to the first sieve plates. The first vibration modules are used to drive the corresponding first sieve plates to vibrate;

[0007] The slideway is arranged between the two first sieve plates. One end of the slideway is slidably connected to the suspension rod, and the other end of the slideway is inclined downward and fixedly connected to the inner side wall of the tower body. The slideway is correspondingly arranged with the first sieve plate above it. The output ends of multiple slideways are respectively connected to the input end of the fine material conveying assembly. The output end of the fine material conveying assembly is connected to the inner cavity of the tower body, and the connection between the output end of the fine material conveying assembly and the tower body is located below the medium particle screening assembly.

[0008] The coarse particle screening assembly is provided with a second discharge port, and the medium particle screening assembly is provided with a third discharge port. The second discharge port and the third discharge port are located outside the tower body.

[0009] Optionally, the shield mud screening device further includes a lifting assembly. The lifting assembly is arranged at the top of the tower body. The output end of the lifting assembly is connected to the suspension rod. The lifting assembly drives the suspension rod to move up and down to change the inclination angle of the first sieve plate.

[0010] Optionally, the lifting assembly includes a driving device and a screw rod. A sleeve is provided at the top of the suspension rod. An internal thread is provided inside the sleeve. The output end of the driving device is connected to one end of the screw rod. The other end of the screw rod is inserted into the inside of the sleeve and is threadedly connected to the sleeve. The driving device drives the screw rod to rotate, and the rotation of the screw rod drives the sleeve to move up and down.

[0011] Optionally, one end of the first sieve plate is hinged to the inner wall of the tower body. A connecting plate is provided at the other end of the first sieve plate. The connecting plate is provided with a movable hole. The movable hole is arranged in the left-right direction. The suspension rod passes through the movable hole, and the suspension rod can be movably arranged in the movable hole in the left-right direction. The lower end surface of the connecting plate abuts against the corresponding first vibration module, and the lower end surface of the connecting plate is slidably connected to the corresponding first vibration module.

[0012] Optionally, the first vibration module includes a first fixing plate, a first elastic member and a sliding plate. The first fixing plate is fixedly connected to the suspension rod. The sliding plate is slidably connected to the suspension rod. The sliding plate slides up and down along the suspension rod. The first elastic member is sleeved on the suspension rod. One end of the first elastic member is fixedly connected to the first fixing plate, and the other end of the first elastic member is fixedly connected to the sliding plate. The lower end surface of the connecting plate abuts against the corresponding sliding plate, and the lower end surface of the connecting plate is slidably connected to the corresponding sliding plate.

[0013] Optionally, a diversion plate is connected to the end of the connecting plate. The diversion plate is arranged towards the first sieve plate below.

[0014] One end of the deflector plate away from the connecting plate is connected to a wire rope, and the lower end of the wire rope is connected to a rubber ball.

[0015] Optionally, the coarse particle screening assembly includes a second sieve plate, a first discharge pipeline, and a second vibration module. The second sieve plate is conical. One end of the first discharge pipeline communicates with the bottom of the second sieve plate. The other end of the first discharge pipeline extends to the outside of the tower body. The second discharge port is arranged at the discharge end of the first discharge pipeline. The second sieve plate and the discharge end of the first discharge pipeline are respectively connected to the tower body through the second vibration module;

[0016] The medium particle screening assembly includes a third sieve plate, a second discharge pipeline, and a third vibration module. The third sieve plate is conical. One end of the second discharge pipeline communicates with the bottom of the third sieve plate. The other end of the second discharge pipeline extends to the outside of the tower body. The third discharge port is arranged at the discharge end of the second discharge pipeline. The third sieve plate and the discharge end of the second discharge pipeline are respectively connected to the tower body through the third vibration module.

[0017] Optionally, the upper and lower ends of the second sieve plate and the upper and lower ends of the first discharge pipeline are respectively provided with the second vibration module. The second vibration module includes a second fixing plate and a second elastic member. The second fixing plate is fixedly connected to the tower body. One end of the second elastic member is fixedly connected to the second fixing plate, and the other end of the second elastic member is fixedly connected to the corresponding second sieve plate and the corresponding first discharge pipeline;

[0018] The upper and lower ends of the third sieve plate and the upper and lower ends of the second discharge pipeline are respectively provided with the third vibration module. The third vibration module includes a third fixing plate and a third elastic member. The third fixing plate is fixedly connected to the tower body. One end of the third elastic member is fixedly connected to the third fixing plate, and the other end of the third elastic member is fixedly connected to the corresponding third sieve plate and the corresponding second discharge pipeline.

[0019] Optionally, the fine material conveying assembly includes a main pipeline and a plurality of sub-pipelines. The output end of the slideway is connected to the input end of the sub-pipeline in one-to-one correspondence. The output end of the sub-pipeline is connected to the input end of the main pipeline. The output end of the main pipeline is connected to the inner cavity of the tower body.

[0020] Optionally, a plurality of spray heads are arranged on the inner wall of the tower body. The spray heads are arranged in one-to-one correspondence with the first sieve plate, and the spray heads are arranged below the corresponding first sieve plate. The spraying end of the spray head faces the corresponding first sieve plate.

[0021] Compared with the prior art, the embodiments of the present utility model have the following beneficial effects:

[0022] 1. By arranging the first vibration module in the fine material screening component, during the screening process, using the self-weight of the mud and muck, and cooperating with the first vibration module to make the first sieve plate vibrate, there is no need to add other equipment to output power to make the screen vibrate, effectively reducing the power of the device and reducing noise. In addition, by arranging the first sieve plates staggered from top to bottom, the screening path can be effectively extended, improving the screening effect.

[0023] 2. By arranging the lifting component, since one end of the first sieve plate is rotatably connected to the inner wall of the tower body, the lifting component drives the suspension rod to move up and down, and the suspension rod drives the end of the first sieve plate connected to the suspension rod to move up and down, thereby changing the inclination angle of the first sieve plate, which can control the flow rate of the mud and facilitate the adjustment of the separation efficiency.

[0024] 3. By arranging the coarse particle screening component and the medium particle screening component, the screening of coarse particles and medium particles can be realized. Moreover, by arranging the second vibration module and the third vibration module, when the coarse particles and medium particles respectively fall on the second sieve plate and the third sieve plate, the second sieve plate and the third sieve plate can vibrate under the action of the second vibration module and the third vibration module, without adding other equipment to output power to make the sieve plate vibrate, further reducing the power of the device and reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a shield mud screening device according to an embodiment of the present utility model.

[0026] Figure 2 is a partial structural schematic diagram of a shield mud screening device according to an embodiment of the present utility model.

[0027] Figure 3 is a schematic structural diagram of the fine material screening component of a shield mud screening device according to an embodiment of the present utility model.

[0028] Figure 4 is a schematic structural diagram of a shield mud screening device according to another embodiment of the present utility model.

[0029] Figure 5 is a partial structural schematic diagram of a shield mud screening device according to an embodiment of the present utility model.

[0030] Figure 6 is a schematic structural diagram (external) of a shield mud screening device according to an embodiment of the present utility model.

[0031] Wherein: tower body 1, feed inlet 11, first discharge outlet 12, spray head 13, fine material screening assembly 2, suspension rod 21, sleeve 211, first sieve plate 22, connecting plate 221, movable hole 2211, diversion plate 222, wire rope 2222, rubber ball 2223, first vibration module 23, first fixing plate 231, first elastic member 232, sliding plate 233, slideway 24, fine material conveying assembly 3, main pipeline 31, branch pipeline 32, coarse particle screening assembly 4, second discharge outlet 41, second sieve plate 42, first discharge pipeline 43, second vibration module 44, second fixing plate 441, second elastic member 442, medium particle screening assembly 5, third discharge outlet 51, third sieve plate 52, second discharge pipeline 53, third vibration module 54, third fixing plate 541, third elastic member 542, lifting assembly 6, driving device 61, screw rod 62. Detailed implementation manners

[0032] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0033] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features, which are used to distinguish and describe the features, without order or weight.

[0034] As Figure 1 shown, a shield mud screening device includes a tower body 1, a fine material screening assembly 2, a fine material conveying assembly 3, a coarse particle screening assembly 4, and a medium particle screening assembly 5. The top of the tower body 1 is provided with a feed inlet 11. The fine material screening assembly 2, the coarse particle screening assembly 4, and the medium particle screening assembly 5 are arranged in sequence from top to bottom inside the tower body 1. The bottom of the tower body 1 is provided with a first discharge outlet 12;

[0035] The fine material screening assembly 2 includes a suspension rod 21, a plurality of first sieve plates 22, a plurality of first vibration modules 23, and a plurality of slideways 24. The plurality of first sieve plates 22 are installed obliquely and staggeredly from top to bottom on the left and right side walls of the tower body 1. The suspension rod 21 is arranged in the middle of the tower body 1. One end of the first sieve plate 22 is rotatably connected to the inner wall of the tower body 1, and the other end of the first sieve plate 22 is movably connected to the suspension rod 21. The first vibration modules 23 are arranged in one-to-one correspondence with the first sieve plates 22. The first vibration modules 23 are fixedly arranged on the suspension rod 21, and the first vibration modules 23 are connected to the first sieve plates 22. The first vibration modules 23 are used to drive the corresponding first sieve plates 22 to vibrate;

[0036] The slideways 24 are arranged between two of the first sieve plates 22. One end of the slideway 24 is slidably connected to the suspension rod 21, and the other end of the slideway 24 is arranged obliquely downward and fixedly connected to the inner side wall of the tower body 1. The slideways 24 are arranged corresponding to the first sieve plates 22 above them. The output ends of the plurality of slideways 24 are respectively connected to the input ends of the fine material conveying assembly 3. The output end of the fine material conveying assembly 3 is connected to the inner cavity of the tower body 1, and the connection point between the output end of the fine material conveying assembly 3 and the tower body 1 is located below the medium particle screening assembly 5;

[0037] The coarse particle screening assembly 4 is provided with a second discharge port 41, and the medium particle screening assembly 5 is provided with a third discharge port 51. The second discharge port 41 and the third discharge port 51 are located outside the tower body 1.

[0038] The slurry generated by the shield enters the interior of the tower body 1 from the feed port 11. The fine particles in the slurry fall onto the corresponding slideway 24 through the first sieve plate 22. The fine particles pass through the slideway 24 and fall into the bottom of the tower body 1 through the fine material conveying assembly 3. The coarse particles and medium particles pass through multiple layers of the first sieve plate 22 and fall onto the coarse particle screening assembly 4 and the medium particle screening assembly 5 for screening. Among them, the coarse particle screening assembly 4 screens out the coarse particles, and the screened coarse particles are discharged from the second discharge port 41. The medium particle screening assembly 5 screens out the medium particles, and the screened medium particles are discharged from the third discharge port 51. By arranging the first vibration module 23 in the fine material screening assembly 2, during the screening process, the self-weight of the slurry and muck is utilized, and the first sieve plate 22 is vibrated in cooperation with the first vibration module 23, without the need to add other equipment to output power to vibrate the sieve plate, effectively reducing the power of the device and reducing noise. In addition, by arranging the first sieve plates 22 that are staggered in sequence from top to bottom, the screening path can be effectively extended, and the screening effect can be improved. The shield slurry screening device has good screening effect, low noise, low power, and has an energy-saving effect, solving the technical problems of high power and high noise of the existing screening devices.

[0039] As Figure 2 and Figure 3 shown, for further illustration, the shield slurry screening device further includes a lifting assembly 6. The lifting assembly 6 is arranged at the top of the tower body 1. The output end of the lifting assembly 6 is connected to the suspension rod 21. The lifting assembly 6 drives the suspension rod 21 to move up and down to change the inclination angle of the first sieve plate 22.

[0040] By arranging the lifting assembly 6, since one end of the first sieve plate 22 is rotatably connected to the inner wall of the tower body 1, the lifting assembly 6 drives the suspension rod 21 to move up and down. The suspension rod 21 drives the end of the first sieve plate 22 connected to the suspension rod 21 to move up and down, thereby changing the inclination angle of the first sieve plate 22, and the flow rate of the slurry can be controlled, which is convenient for adjusting the separation efficiency.

[0041] Specifically, the lifting assembly 6 includes a driving device 61 and a screw rod 62. A sleeve 211 is provided at the top of the suspension rod 21. An internal thread is provided inside the sleeve 211. The output end of the driving device 61 is connected to one end of the screw rod 62. The other end of the screw rod 62 is inserted into the inside of the sleeve 211 and is threadedly connected to the sleeve 211. The driving device 61 drives the screw rod 62 to rotate, and the screw rod 62 rotates to drive the sleeve 211 to move up and down.

[0042] By setting the driving device 61 and the screw rod 62, one end of the screw rod 62 is connected to the output end of the driving device 61, the other end of the screw rod 62 is inserted into the interior of the sleeve 211 and is threadedly connected to the sleeve 211. The driving device 61 drives the screw rod 62 to rotate, and the rotation of the screw rod 62 drives the sleeve 211 to move up and down, thereby driving the suspension rod 21 to move up and down, realizing the up and down movement of the suspension rod 21, and further changing the inclination angle of the first sieve plate 22.

[0043] Specifically, the driving device 61 is a motor, and the driving stability is strong.

[0044] Further explanation, one end of the first sieve plate 22 is hinged to the inner wall of the tower body 1, the other end of the first sieve plate 22 is provided with a connecting plate 221, the connecting plate 221 is provided with a movable hole 2211, the movable hole 2211 is arranged in the left-right direction, the suspension rod 21 passes through the movable hole 2211, and the suspension rod 21 is movably arranged in the movable hole 2211 in the left-right direction. The lower end surface of the connecting plate 221 abuts against the corresponding first vibration module 23, and the lower end surface of the connecting plate 221 is slidably connected to the corresponding first vibration module 23.

[0045] When the suspension rod 21 moves up and down, the suspension rod 21 drives the first vibration module 23 to move up and down. Since the lower end surface of the connecting plate 221 abuts against the corresponding first vibration module 23 and the lower end surface of the connecting plate 221 is slidably connected to the corresponding first vibration module 23, when the suspension rod 21 moves up and down, the first vibration module 23 drives the end of the corresponding first sieve plate 22 connected to the suspension rod 21 to also move up and down. At this time, the movable hole 2211 provides a left-right movement space for the first sieve plate 22 to change the inclination angle, and the suspension rod 21 moves left and right relative to the connecting plate 221 in the movable hole 2211 to prevent the first sieve plate 22 from deforming when changing the inclination angle. Specifically, the connecting plate 221 can be horizontally arranged to ensure the smoothness of the left-right movement of the connecting plate 221.

[0046] Further explanation, a through hole for the suspension rod 21 to slide can be opened at the connection between the slideway 24 and the suspension rod 21 to realize the sliding connection between the slideway 24 and the suspension rod 21.

[0047] Further elaboration is as follows. The first vibration module 23 includes a first fixing plate 231, a first elastic member 232, and a sliding plate 233. The first fixing plate 231 is fixedly connected to the suspension rod 21. The sliding plate 233 is slidably connected to the suspension rod 21. The sliding plate 233 slides up and down along the suspension rod 21. The first elastic member 232 is sleeved on the suspension rod 21. One end of the first elastic member 232 is fixedly connected to the first fixing plate 231, and the other end of the first elastic member 232 is fixedly connected to the sliding plate 233. The lower end surface of the connecting plate 221 abuts against the corresponding sliding plate 233, and the lower end surface of the connecting plate 221 is slidably connected to the corresponding sliding plate 233.

[0048] When the mud drops onto the first sieve plate 22, under the elastic action of the first elastic member 232, the first sieve plate 22 vibrates, thereby effectively improving the screening efficiency and enabling the particles to quickly disperse and slide on the first sieve plate 22. The sliding plate 233 can function to contact the connecting plate 221 and transmit the self-weight of the mud and the vibration force of the first elastic member 232. Specifically, the first elastic member 232 is a spring.

[0049] As Figure 4 shown, in an embodiment of the present invention, a flow guide plate 222 is connected to the end of the connecting plate 221, and the flow guide plate 222 is arranged facing the first sieve plate 22 below.

[0050] A steel wire rope 2222 is connected to the end of the flow guide plate 222 away from the connecting plate 221, and a rubber ball 2223 is connected to the lower end of the steel wire rope 2222.

[0051] By providing the flow guide plate 222, which is arranged facing the first sieve plate 22 below itself, the mud can be guided, enabling the mud to smoothly drop onto the next first sieve plate 22, effectively improving the screening efficiency.

[0052] By providing the steel wire rope 2222 on the flow guide plate 222 and connecting the rubber ball 2223 to the steel wire rope 2222, when the first sieve plate 22 vibrates, it drives the flow guide plate 222 to vibrate. The vibration of the flow guide plate 222 causes the rubber ball 2223 to collide with the first sieve plate 22 below. Even if there are muck particles blocking the mesh holes of the first sieve plate 22, the particles blocking the mesh holes can fall under the action of the rubber ball 2223. The weight of the rubber ball 2223 can be 3 - 4 kg. Preferably, except for the flow guide plate 222 at the bottom of the tower body 1, the other flow guide plates 222 are all connected with the steel wire rope 2222.

[0053] AsFigure 5 As shown, further illustrated, the coarse particle screening assembly 4 includes a second sieve plate 42, a first discharge pipeline 43 and a second vibration module 44. The second sieve plate 42 is conical. One end of the first discharge pipeline 43 is communicated with the bottom of the second sieve plate 42. The other end of the first discharge pipeline 43 extends to the outside of the tower body 1. The second discharge port 41 is arranged at the discharge end of the first discharge pipeline 43. The second sieve plate 42 and the discharge end of the first discharge pipeline 43 are respectively connected with the tower body 1 through the second vibration module 44;

[0054] The medium particle screening assembly 5 includes a third sieve plate 52, a second discharge pipeline 53 and a third vibration module 54. The third sieve plate 52 is conical. One end of the second discharge pipeline 53 is communicated with the bottom of the third sieve plate 52. The other end of the second discharge pipeline 53 extends to the outside of the tower body 1. The third discharge port 51 is arranged at the discharge end of the second discharge pipeline 53. The third sieve plate 52 and the discharge end of the second discharge pipeline 53 are respectively connected with the tower body 1 through the third vibration module 54.

[0055] Fine particles pass through the slideway 24 and the fine material conveying assembly 3 and fall into the bottom of the tower body 1. Coarse particles and medium particles pass through multiple layers of the first screen 22 and fall onto the coarse particle screening assembly 4 and the medium particle screening assembly 5 for screening. Among them, the second sieve plate 42 screens out the coarse particles, so that the screened coarse particles are discharged from the second discharge port 41. The third sieve plate 52 screens out the medium particles, and the screened medium particles are discharged from the third discharge port 51. Specifically, the aperture of the first sieve plate 22 is 3 mm. After the slurry passes through the first sieve plate 22, particles with a particle size less than 3 mm pass through the slideway 24 and the fine material conveying assembly 3 and fall into the bottom of the tower body 1 and are discharged from the first discharge port 12; the aperture of the second sieve plate 42 is 20 mm. After the slurry is filtered by the second sieve plate 42, coarse particles with a particle size greater than 20 mm are discharged from the second discharge port 41; the aperture of the third sieve plate 52 is 3 mm, so that medium particles with a particle size greater than 3 mm and less than 20 mm are discharged through the third discharge port 51, effectively realizing the screening of fine materials, medium particles and coarse particles. In addition, by setting the second vibration module 44 and the third vibration module 54, when the coarse particles and medium particles respectively fall on the second sieve plate 42 and the third sieve plate 52, the second sieve plate 42 and the third sieve plate 52 can be vibrated under the action of the second vibration module 44 and the third vibration module 54, without the need to externally apply other equipment to output power to vibrate the sieve plate, further reducing the power of the device and reducing noise.

[0056] To further illustrate, the upper and lower ends of the second sieve plate 42 and the upper and lower ends of the first discharge pipe 43 are respectively provided with the second vibration module 44. The second vibration module 44 includes a second fixing plate 441 and a second elastic member 442. The second fixing plate 441 is fixedly connected to the tower body 1. One end of the second elastic member 442 is fixedly connected to the second fixing plate 441, and the other end of the second elastic member 442 is fixedly connected to the corresponding second sieve plate 42 and the corresponding first discharge pipe 43;

[0057] The upper and lower ends of the third sieve plate 52 and the upper and lower ends of the second discharge pipe 53 are respectively provided with the third vibration module 54. The third vibration module 54 includes a third fixing plate 541 and a third elastic member 542. The third fixing plate 541 is fixedly connected to the tower body 1. One end of the third elastic member 542 is fixedly connected to the third fixing plate 541, and the other end of the third elastic member 542 is fixedly connected to the corresponding third sieve plate 52 and the corresponding second discharge pipe 53.

[0058] The second sieve plate 42 can vibrate under the elastic action of the second elastic member 442, and the first discharge pipe 43 can vibrate under the elastic action of the second elastic member 442. Similarly, the third sieve plate 52 can vibrate under the elastic action of the third elastic member 542, and the second discharge pipe 53 can vibrate under the elastic action of the third elastic member 542, effectively improving the screening efficiency and avoiding particle accumulation on the surface of the sieve plate. Specifically, both the second elastic member 442 and the third elastic member 542 are springs.

[0059] As Figure 6 shown, specifically, the fine material conveying assembly 3 includes a main pipe 31 and a plurality of branch pipes 32. The output end of the slideway 24 is connected to the input end of the branch pipe 32 in one-to-one correspondence. The output end of the branch pipe 32 is connected to the input end of the main pipe 31, and the output end of the main pipe 31 is connected to the inner cavity of the tower body 1.

[0060] By providing the main pipe 31 and the branch pipes 32, the branch pipes 32 can collect the fine materials sliding down from the slideway 24 and drop them to the bottom of the tower body 1 through the main pipe 31. The fine materials are finally discharged through the first discharge port 12 at the bottom of the tower body 1 and can form mud cakes for backfilling operations after dehydration.

[0061] Specifically, the shape of the tower body 1 is a vertically placed rectangle. Due to the limited site space at the shield construction site, by setting the shape of the tower body 1 as a rectangle, it occupies a small site area and can improve the space utilization rate of the shield construction site.

[0062] Specifically, the input end of the first sieve plate 22 located at the top of the tower body 1 is arranged below the feed port 11, so that the mud enters from the feed port 11 and is transported from top to bottom along the first sieve plate 22 located at the top.

[0063] like Figure 1 As shown, preferably, a plurality of nozzles 13 are provided on the inner wall of the tower body 1, and the nozzles 13 are provided in one-to-one correspondence with the first sieve plates 22, and the nozzles 13 are provided below the corresponding first sieve plates 22, and the injection ends of the nozzles 13 are provided toward the corresponding first sieve plates 22.

[0064] By providing the nozzle 13, the nozzle 13 can flush the bottom of the first sieve plate 22, thereby preventing the sieve holes of the first sieve plate 22 from being blocked, thereby ensuring the screening efficiency.

[0065] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A shield mud screening device, characterized in that: It comprises a tower body, a fine material screening assembly, a fine material conveying assembly, a coarse particle screening assembly and a medium particle screening assembly, wherein a feed port is arranged at the top of the tower body, the fine material screening assembly, the coarse particle screening assembly and the medium particle screening assembly are sequentially arranged inside the tower body from top to bottom, and a first discharge port is arranged at the bottom of the tower body; The fine material screening assembly includes a suspension rod, a plurality of first sieve plates, a plurality of first vibration modules and a plurality of slideways, wherein the plurality of first sieve plates are staggered and tiltedly installed on the left and right side walls of the tower body from top to bottom, the suspension rod is arranged in the middle of the tower body, one end of the first sieve plate is rotatably connected to the inner wall of the tower body, and the other end of the first sieve plate is movably connected to the suspension rod; the first vibration module is arranged in a one-to-one correspondence with the first sieve plate, the first vibration module is fixedly arranged on the suspension rod, and the first vibration module is connected to the first sieve plate, and the first vibration module is used to drive the corresponding first sieve plate to vibrate; The slide is arranged between the two first sieve plates, one end of the slide is slidably connected to the suspension rod, the other end of the slide is inclined downward and fixedly connected to the inner side wall of the tower body, and the slide is arranged corresponding to the first sieve plate located above the slide; The output ends of the plurality of slideways are respectively connected to the input ends of the fine material conveying assembly, the output end of the fine material conveying assembly is connected to the inner cavity of the tower body, and the connection between the output end of the fine material conveying assembly and the tower body is located below the medium particle screening assembly; The coarse particle screening assembly is provided with a second discharge port, and the medium particle screening assembly is provided with a third discharge port, and the second discharge port and the third discharge port are located outside the tower body.

2. The shield mud screening device according to claim 1, characterized in that: The shield mud screening device also includes a lifting component, which is arranged on the top of the tower body. The output end of the lifting component is connected to the suspension rod. The lifting component drives the suspension rod to move up and down to change the inclination angle of the first screen plate.

3. The shield mud screening device according to claim 2, characterized in that: The lifting assembly includes a driving device and a screw rod. A sleeve is provided on the top of the suspension rod. An internal thread is provided inside the sleeve. The output end of the driving device is connected to one end of the screw rod. The other end of the screw rod is inserted into the interior of the sleeve and is threadedly connected to the sleeve. The driving device drives the screw rod to rotate, and the rotation of the screw drives the sleeve to move up and down.

4. The shield mud screening device according to claim 2, characterized in that: One end of the first sieve plate is hinged to the inner wall of the tower body, and the other end of the first sieve plate is provided with a connecting plate, and the connecting plate is provided with a movable hole, and the movable hole is arranged along the left and right directions. The suspension rod is passed through the movable hole, and the suspension rod can be movably arranged in the movable hole along the left and right directions. The lower end surface of the connecting plate abuts against the corresponding first vibration module, and the lower end surface of the connecting plate is slidably connected to the corresponding first vibration module.

5. The shield mud screening device according to claim 4, characterized in that: The first vibration module includes a first fixed plate, a first elastic member and a sliding plate, the first fixed plate is fixedly connected to the suspension rod, the sliding plate is slidably connected to the suspension rod, and the sliding plate slides up and down along the suspension rod, the first elastic member is sleeved on the suspension rod, and one end of the first elastic member is fixedly connected to the first fixed plate, and the other end of the first elastic member is fixedly connected to the sliding plate, the lower end surface of the connecting plate is abutted against the corresponding sliding plate, and the lower end surface of the connecting plate is slidably connected to the corresponding sliding plate.

6. The shield mud screening device according to claim 4, characterized in that: The end of the connecting plate is connected with a guide plate, and the guide plate is arranged toward the first sieve plate below; One end of the guide plate away from the connecting plate is connected with a steel wire rope, and the lower end of the steel wire rope is connected with a rubber ball.

7. The shield mud screening device according to claim 1, characterized in that: The coarse particle screening assembly includes a second sieve plate, a first discharge pipe and a second vibration module, the second sieve plate is conical, one end of the first discharge pipe is connected to the bottom of the second sieve plate, the other end of the first discharge pipe extends to the outside of the tower body, the second discharge port is arranged at the discharge end of the first discharge pipe, and the second sieve plate and the discharge end of the first discharge pipe are respectively connected to the tower body through the second vibration module; The medium particle screening assembly includes a third sieve plate, a second discharge pipe and a third vibration module. The third sieve plate is conical. One end of the second discharge pipe is connected to the bottom of the third sieve plate, and the other end of the second discharge pipe extends to the outside of the tower body. The third discharge port is arranged at the discharge end of the second discharge pipe. The third sieve plate and the discharge end of the second discharge pipe are respectively connected to the tower body through the third vibration module.

8. The shield mud screening device according to claim 7, characterized in that: The second vibration modules are respectively provided at the upper and lower ends of the second sieve plate and the upper and lower ends of the first discharge pipe, and the second vibration module includes a second fixing plate and a second elastic member, the second fixing plate is fixedly connected to the tower body, one end of the second elastic member is fixedly connected to the second fixing plate, and the other end of the second elastic member is fixedly connected to the corresponding second sieve plate and the corresponding first discharge pipe; The third vibration module is respectively provided at the upper and lower ends of the third sieve plate and the upper and lower ends of the second discharge pipe, and the third vibration module includes a third fixed plate and a third elastic member, the third fixed plate is fixedly connected to the tower body, one end of the third elastic member is fixedly connected to the third fixed plate, and the other end of the third elastic member is fixedly connected to the corresponding third sieve plate and the corresponding second discharge pipe.

9. The shield mud screening device according to claim 1, characterized in that: The fine material conveying assembly includes a main pipeline and multiple branch pipelines, the output end of the slide is connected to the input end of the branch pipeline one by one, the output end of the branch pipeline is connected to the input end of the main pipeline, and the output end of the main pipeline is connected to the inner cavity of the tower body.

10. The shield mud screening device according to claim 1, characterized in that: A plurality of nozzles are arranged on the inner wall of the tower body. The nozzles are arranged in one-to-one correspondence with the first sieve plates, and the nozzles are arranged below the corresponding first sieve plates. The spraying ends of the nozzles are arranged toward the corresponding first sieve plates.

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