Screening bin

Abstract

The application provides a screening box, which comprises the following: opposite ends of a screening assembly are respectively provided with a residue inlet and a residue outlet which are communicated with the inner cavity of the screening assembly; a first-stage screw conveying assembly is arranged in the inner cavity of the screening assembly to convey the residue stones entering from the residue inlet out of the residue outlet; two ends of a transfer assembly are respectively provided with a first channel and a second channel which are communicated with the inner cavity of the transfer assembly; the first channel is connected with the residue outlet; a second-stage screw conveying assembly is arranged in the inner cavity of the transfer assembly to convey the residue slurry and the residue stones entering from the first channel out of the second channel; a first gate and a second gate are respectively arranged in the first channel and the second channel in an openable and closable mode; the first gate and the second gate can seal the inner cavity of the transfer assembly; a liquid conveying pipeline is connected between the screening assembly and the transfer assembly in an openable and closable mode; and the liquid conveying pipeline can convey the residue slurry in the screening assembly into the inner cavity of the transfer assembly, thereby solving the problem of non-stop residue stone discharge of a slurry shield tunneling machine during tunnel construction in a tunnel where the proportion of large-particle residue stones is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield machine equipment, and particularly relates to a screening box. BACKGROUND

[0002] The description in this part only provides background information related to the present application disclosure, and does not constitute prior art.

[0003] The slurry shield is limited in the particle size of the sludge discharged by the circulating system pump. When the slurry shield is used in the construction process of composite stratum, broken zone, gravel stratum and other working conditions, the slurry pump is often blocked, which seriously affects the construction tunneling.

[0004] Currently, measures such as adding a stone collecting box or a screening box in front of the slurry pump are usually adopted. However, the slurry shield machine needs to maintain a certain pressure (about 6 bar to 12 bar) during construction tunneling, and the amount of sludge discharged per ring is large. If the machine is stopped for stone removal, the stone collecting efficiency will be greatly reduced.

[0005] In recent years, with the improvement of the performance of the slurry shield, its high control settlement level has been widely used in highway tunnels, broken zone stratum and cross-river and sea conditions. However, for large-particle sludge in gravel stratum and broken zone stratum, it is still a difficult problem in current construction. For example, the prior art with publication number "CN216714389U" provides a horizontal and vertical grid to improve the stone collecting efficiency of large-particle sludge, but it still cannot solve the problem of large-particle sludge construction without stopping the machine. For example, the prior art with publication number "CN112065430A" provides a roller type screening box, which improves the stone collecting efficiency and storage capacity of large-particle sludge through multiple cam rollers, but it still cannot solve the problem of large-particle sludge jamming and stone construction without stopping the machine.

[0006] It should be noted that the above introduction to the technical background is only for the convenience of clearly and completely describing the technical scheme of the present application, and for the convenience of understanding by those skilled in the art. The above technical scheme cannot be considered as known by those skilled in the art only because it is described in the background section of the present application. SUMMARY

[0007] The purpose of the present application is to provide a screening box, which solves the problem of discharging sludge without stopping the machine when the slurry shield machine is used in tunnel construction with a large proportion of large-particle sludge.

[0008] The above implementation purposes of the present application are mainly realized by the following technical scheme:

[0009] The present application provides a screening box, which comprises:

[0010] The screen assembly is provided with a residue inlet and a residue outlet at two ends respectively, and a first screw conveying assembly is arranged in the inner cavity of the screen assembly.

[0011] The transfer assembly is provided with a first channel and a second channel at two ends respectively, the first channel is connected with the residue outlet, the second channel is connected with the outside of the screen box, and a second screw conveying assembly is arranged in the inner cavity of the transfer assembly.

[0012] The pressure stabilizing assembly comprises a first gate and a second gate, the first gate and the second gate are arranged in the first channel and the second channel respectively, the first gate and the second gate can seal the inner cavity of the transfer assembly, and a liquid conveying pipeline is connected between the screen assembly and the transfer assembly in an openable and closable mode, and the liquid conveying pipeline can convey the residue slurry in the screen assembly into the inner cavity of the transfer assembly.

[0013] In a specific embodiment,

[0014] The screen assembly comprises a screen box and a circulating box, the screen box and the circulating box are connected in layers from top to bottom, the residue inlet is arranged at the top of the screen box, one end of the first screw conveying assembly is arranged in the screen box, a screen mesh hole plate is arranged between the screen box and the circulating box, and the inner cavity of the screen box is connected with the inner cavity of the circulating box through the screen mesh hole plate.

[0015] In a specific embodiment,

[0016] The screen assembly further comprises a flushing pipe and a slurry discharge pipe, the circulating box is provided with a slurry inlet and a slurry outlet at opposite ends respectively, the flushing pipe is connected with the slurry inlet and used for inputting pressure fluid into the inner cavity of the circulating box, and the slurry discharge pipe is connected with the slurry outlet and used for conveying the residue and slurry in the inner cavity of the circulating box to the ground water separation station through the screen mesh hole plate.

[0017] In a specific embodiment,

[0018] The screen assembly further comprises a first-level residue storage box and a first-level conveying box connected with each other, the first-level conveying box and the screen box are connected with the first-level residue storage box, and the residue outlet is arranged at one end of the first-level conveying box away from the first-level residue storage box.

[0019] The primary screw conveying assembly comprises a first screw conveying member and a second screw conveying member, the first screw conveying member is rotatably arranged in the sieve box, one end of the first screw conveying member is arranged close to the primary stone storage box for conveying the slurry and stone in the sieve box into the primary stone storage box, and the second screw conveying member is rotatably arranged in the primary conveying box, one end of the second screw conveying member extends into the inner cavity of the primary stone storage box for conveying the slurry and stone in the primary stone storage box out of the slag discharge port.

[0020] In a specific embodiment,

[0021] The inner cavity of the sieve box is connected with the inner cavity of the primary stone storage box through an opening located at the top of the primary stone storage box, and the end of the first screw conveying member close to the primary stone storage box is higher than the end of the first screw conveying member close to the slag inlet, so as to lift and convey the slurry and stone in the sieve box into the inner cavity of the primary stone storage box.

[0022] In a specific embodiment,

[0023] The transfer assembly comprises a secondary stone storage box and a secondary conveying box connected with each other, the first channel is arranged at the top of the secondary stone storage box, the second channel is arranged at the end of the secondary conveying box away from the secondary stone storage box, the secondary screw conveying assembly is rotatably arranged in the secondary conveying box, one end of the secondary screw conveying assembly extends into the inner cavity of the secondary stone storage box for conveying the slurry and stone in the secondary stone storage box out of the second channel.

[0024] In a specific embodiment,

[0025] The end of the primary conveying box where the slag discharge port is arranged is higher than the end of the primary conveying box connected with the primary stone storage box, so that the slag discharge port is connected with the first channel, and the end of the second screw conveying member close to the slag discharge port is higher than the end of the second screw conveying member extending into the primary stone storage box, so as to lift and convey the slurry and stone in the primary stone storage box into the secondary stone storage box.

[0026] In a specific embodiment,

[0027] The end of the secondary stone storage box where the second channel is arranged is higher than the end of the secondary conveying box connected with the secondary stone storage box, and the end of the secondary screw conveying assembly close to the second channel is higher than the end of the secondary screw conveying assembly extending into the secondary stone storage box, so as to lift and convey the slurry and stone in the secondary stone storage box out of the second channel.

[0028] In a specific embodiment,

[0029] The pressure stabilizing assembly further comprises a plurality of openable exhaust pipes, each of which is connected to the top of the secondary stone storage tank and the top of the secondary conveying tank, and used for discharging gas in the inner cavity of the secondary stone storage tank and gas in the inner cavity of the secondary conveying tank.

[0030] In a specific embodiment,

[0031] The pressure stabilizing assembly further comprises an exhaust device, the bottom of which is provided with an inlet and an outlet connected to the inner cavity of the exhaust device, and the top of which is provided with an exhaust port connected to the inner cavity of the exhaust device.

[0032] The inlet is connected to the exhaust pipe, and is used for inputting the slurry and gas in the inner cavity of the transfer assembly into the inner cavity of the exhaust device; the exhaust port is provided with a one-way exhaust assembly, and is used for discharging the gas in the inner cavity of the exhaust device; and the outlet is connected to the slurry separation station, and is used for conveying the slurry in the inner cavity of the exhaust device to the ground.

[0033] In a specific embodiment,

[0034] The pressure stabilizing assembly further comprises a plurality of pressure measuring elements, each of which is arranged in the inner cavity of the screening assembly and the inner cavity of the transfer assembly, and electrically connected to the liquid conveying pipeline, the first gate and the second gate.

[0035] When the first gate and the second gate are in the closed state, and the pressure in the inner cavity of the screening assembly is greater than the pressure in the inner cavity of the transfer assembly, the liquid conveying pipeline can convey the pressure slurry in the screening assembly to the inner cavity of the transfer assembly.

[0036] Compared with the prior art, the technical scheme has the following characteristics and advantages:

[0037] The screening tank provided by the application has the screening assembly as a component for receiving the slag and stone output by the slurry shield machine, the transfer assembly as a component for transferring the pressure change, and the pressure stabilizing device as a component for adjusting the pressure change in the inner cavity of the transfer assembly, so that the screening tank can work under the same pressure as the working pressure of the pressure liquid in the slurry shield machine, and the problem that the slurry shield machine must be stopped to clean the large-size stone blocks accumulated in the screening tank and cannot be taken away by the flushing liquid is solved. BRIEF DESCRIPTION OF DRAWINGS

[0038] The drawings described herein are for purposes of illustration only and are not intended to limit the scope of the present disclosure in any way. Additionally, the shapes and proportions of the various components depicted in the drawings are not intended to be specific limitations of the shapes and proportions of the various components of the present application. Those skilled in the art will recognize that various modifications can be made to the shapes and proportions of the various components of the present application without departing from the scope of the present application.

[0039] Figure 1 Structure diagram of the screening assembly of the screening box of the present application;

[0040] Figure 2 First side view of the screening assembly of the screening box of the present application;

[0041] Figure 3 Second side view of the screening assembly of the screening box of the present application;

[0042] Figure 4 Side view of the transfer assembly of the screening box of the present application;

[0043] Figure 5 Structure diagram of the screening assembly and the transfer assembly of the screening box of the present application;

[0044] Figure 6 Structure diagram of the exhaust device of the screening box of the present application.

[0045] BRIEF DESCRIPTION OF DRAWINGS

[0046] 100, screening assembly;

[0047] 110, slag inlet; 120, slag outlet;

[0048] 131, first screw conveying member; 132, second screw conveying member;

[0049] 140, screening box;

[0050] 150, circulating box;

[0051] 151, flushing pipe; 152, slurry discharge pipe;

[0052] 153, slurry inlet; 154, slurry outlet;

[0053] 160, screen mesh plate;

[0054] 170, first-stage stone storage box; 180, first-stage conveying box;

[0055] 200, transfer assembly; 210, first passage; 220, second passage;

[0056] 230, second-stage screw conveying assembly;

[0057] 240, secondary stone storage tank; 250, secondary conveying tank;

[0058] 300, pressure stabilizing assembly;

[0059] 310, first gate; 320, second gate;

[0060] 330, infusion pipeline; 340, exhaust pipeline;

[0061] 350, exhaust device;

[0062] 351, inlet; 352, outlet;

[0063] 353, exhaust port; 354, one-way exhaust assembly;

[0064] 360, pressure measuring element. DETAILED DESCRIPTION

[0065] In order to make the personnel in the technical field better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work should belong to the scope of protection of the present application.

[0066] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0068] As shown in Figures 1 to 5 the present application provides a screening tank, comprising:

[0069] The screening assembly 100 is provided with a slag inlet 110 and a slag outlet 120 at both ends, which are connected to the inner cavity of the screening assembly 100, and a primary screw conveying assembly is arranged in the inner cavity of the screening assembly 100.

[0070] The transfer assembly 200 is provided with a first channel 210 and a second channel 220 at two ends thereof, the first channel 210 is connected with the discharge port 120, and the second channel 220 is connected with the outside of the screening box, and the inner cavity of the transfer assembly 200 is provided with a two-stage spiral conveying assembly 230;

[0071] The pressure stabilizing assembly 300 comprises a first gate 310, a second gate 320 and a liquid conveying pipeline 330, the first gate 310 and the second gate 320 are arranged in the first channel 210 and the second channel 220 respectively, the first gate 310 and the second gate 320 can seal the inner cavity of the transfer assembly 200, and the liquid conveying pipeline 330 is connected between the screening assembly 100 and the transfer assembly 200 in an openable and closable mode, and the liquid conveying pipeline 330 can convey the slurry in the screening assembly 100 to the inner cavity of the transfer assembly 200.

[0072] The screening box provided by the present application comprises the screening assembly 100, the transfer assembly 200 and the pressure stabilizing assembly 300, the screening assembly 100 is used as a component for receiving the sludge stones output by the slurry shield machine, the transfer assembly 200 is used as a component for transferring the pressure change of the screening box, and the pressure stabilizing assembly 300 is used as a component for adjusting the pressure change of the inner cavity of the transfer assembly 200, the three components are combined and operated together, so that the screening box can work under the same pressure as the working pressure of the pressure liquid in the slurry shield machine, and the problem that the slurry shield machine must be stopped and the pressure must be released before the large-size stone blocks accumulated in the screening box and unable to be taken away by the flushing liquid can be cleaned is solved.

[0073] In the embodiment, the screening assembly 100 is used for connecting the sludge conveying port of the slurry shield main machine, the slurry conveying port of the slurry shield main machine is connected with the sludge inlet 110, that is, the sludge stones and the slurry mixed by the slurry shield main machine are introduced into the inner cavity of the screening assembly 100 from the sludge conveying port, at this time, the pressure in the inner cavity of the screening assembly 100 is the same as the working pressure of the slurry shield machine, the fluid flushing caused by the pressure difference can be avoided, and the gas existing in the inner cavity of the screening assembly 100 caused by the communication between the screening assembly 100 and the outside can also be avoided, and the residual gas can move between the devices to cause the risk of cavitation and other hazards to the devices of the slurry shield machine and the devices of the screening box.

[0074] In the embodiment, the sludge inlet 110 and the sludge discharge port 120 are arranged at the opposite ends of the screening assembly 100 and connected with the inner cavity of the screening assembly 100, and the first channel 210 and the second channel 220 are arranged at the opposite ends of the transfer assembly 200 and connected with the inner cavity of the transfer assembly 200.

[0075] In the embodiment, the first and second spiral conveying assemblies 230 are generally composed of a spiral conveyor. The spiral conveyor can drive the slag stones to rise along the gap between the spiral blades of the spiral conveyor, and the slag slurry can also move upward along the spiral conveyor out of the slag discharge port 120 by using the gap between the spiral blades and the rotation of the spiral blades. In the embodiment, the spiral conveyor is generally composed of a spiral conveying shaft and a driving motor for driving the spiral conveying shaft to rotate.

[0076] In the embodiment, the first spiral conveying assembly is used to convey the slag slurry and slag stones entering from the slag inlet port 110 out of the slag discharge port 120, and the second spiral conveying assembly 230 is used to convey the slag slurry and slag stones entering from the first channel 210 out of the second channel 220.

[0077] In the embodiment, the transfer assembly 200 is connected and communicated with the screening assembly 100. The transfer assembly 200 has a first channel 210 for communicating with the inner cavity of the screening assembly 100, so that the slag stones and slag slurry conveyed by the first spiral conveying assembly in the screening assembly 100 can enter the inner cavity of the transfer assembly 200. The second channel 220 is used to communicate with the outside of the screening box, that is, the slag stones and slag slurry in the transfer assembly 200 can be output to the outside of the screening box through the second channel 220.

[0078] In the embodiment, the first gate member 310 is arranged in the first channel 210 in an openable and closable manner, and the second gate member 320 is arranged in the second channel 220 in an openable and closable manner. When the first and second gate members 310 and 320 of the pressure stabilizing assembly 300 are in the closed state, the inner cavity of the transfer assembly 200 can be sealed.

[0079] In the conventional conveying stage, the second gate member 320 blocks the second channel 220, and the first gate member 310 is in the open state, so that the slag stones and slag slurry conveyed by the first spiral conveying assembly in the screening assembly 100 can enter the inner cavity of the transfer assembly 200 under the working pressure of the slurry shield tunneling machine.

[0080] In the slag discharge stage, the first gate member 310 is in the closed state, and the second gate member 320 is in the open state. The inner cavity of the transfer assembly 200 is communicated with the atmosphere to release pressure. At this time, the operator can discharge and clean the slag stones and slag slurry in the transfer assembly 200 by using the second spiral conveying assembly 230. Since the first gate member 310 is in the closed state, the screening assembly 100 can continue to receive the slag slurry and slag stones input from the slag soil conveying port, and the pressure of the screening assembly 100 is not affected.

[0081] In the liquid supplement stage, after the slag stones in the transfer assembly 200 are cleaned, the second gate 320 is closed to make the inner cavity of the transfer assembly 200 in a sealed state, in this stage, the liquid supplement pipeline 330 can be opened to transport the slurry in the screening assembly 100 to the inner cavity of the sealed transfer assembly 200, when the liquid pressure in the transfer assembly 200 is consistent with the liquid pressure in the screening assembly 100, the first gate 310 is opened, and the slag stones and the slurry are continuously transported to the transfer assembly 200 by the primary screw conveying assembly, so that the slag stones that cannot be taken away by fluid flushing are cleaned in the state that the slurry shield machine does not stop.

[0082] As shown in the specific embodiment, Figures 1 to 3 As shown in the specific embodiment,

[0083] The screening assembly 100 includes a screen box 140 and a circulating box 150, the screen box 140 and the circulating box 150 are connected in a stacked manner from top to bottom, the slag inlet 110 is arranged at the top of the screen box 140, one end of the primary screw conveying assembly is located in the screen box 140, a screen mesh hole plate 160 is arranged between the screen box 140 and the circulating box 150, and the inner cavity of the screen box 140 is in communication with the inner cavity of the circulating box 150 through the screen mesh hole plate 160.

[0084] The screening box provided by the application can make part of the small slag stones that can be taken away by fluid flushing sink into the circulating box 150 through the screen mesh hole plate 160, and wait for further fluid flushing, so that the situation that the transfer and slag removal efficiency cannot keep up with the efficiency of the slag stone produced by the shield machine due to the need of the primary screw conveying assembly and the secondary screw conveying assembly 230 to transport all the slag stones is avoided.

[0085] In the specific embodiment, the screen box 140 and the circulating box 150 are arranged in a stacked manner from top to bottom, the bottom of the screen box 140 is open, the top of the circulating box 150 is open, and the screen box 140 and the circulating box 150 are in communication through the screen mesh hole plate 160 arranged between the screen box 140 and the circulating box 150, that is, part of the slag stones that can be taken away by fluid flushing can be screened into the circulating box 150 through the gravity of the slag stones and the screen mesh hole plate 160.

[0086] In the specific embodiment, the slag inlet 110 is arranged at the top of the screen box 140, that is, the slag stones input into the screen box 140 can sink onto the screen mesh hole plate 160 under the action of gravity, and part of the slag stones can pass through the screen mesh hole plate 160 under the action of gravity; in the specific embodiment, one end of the primary screw conveying assembly is located in the screen box 140, and the large slag stones that do not pass through the screen mesh hole plate 160 are conveyed out of the slag discharge port 120.

[0087] As shown in the specific embodiment, Figure 1 As shown in the specific embodiment,

[0088] The screening assembly 100 further comprises a flushing pipe 151 and a slurry discharge pipe 152, and the opposite ends of the circulating tank 150 are respectively provided with a slurry inlet 153 and a slurry outlet 154, the flushing pipe 151 is communicated with the slurry inlet 153 and used to input pressure fluid into the inner cavity of the circulating tank 150, and the slurry discharge pipe 152 is communicated with the slurry outlet 154 and used to transport the sludge and slurry settled in the inner cavity of the circulating tank 150 through the screen mesh plate 160 to the ground slurry separation station.

[0089] The screening tank provided by the present application is provided with the flushing pipe 151 and the slurry discharge pipe 152, so that the sludge passing through the screen mesh plate 160 can be carried out by the pressure fluid and transported to the ground slurry separation station for treatment

[0090] Specifically, in the embodiment, the flushing pipe 151 can use the slurry separated from the slurry separation station for transportation, and in other embodiments, the slurry is not limited.

[0091] As shown in the specific embodiment, Figures 1 to 3

[0092] The screening assembly 100 further comprises a first-stage storage tank 170 and a first-stage conveying tank 180 connected in sequence, the first-stage conveying tank 180 and the screening tank 140 are connected to the first-stage storage tank 170, and the sludge discharge port 120 is arranged at one end of the first-stage conveying tank 180 away from the first-stage storage tank 170.

[0093] The first-stage screw conveying assembly comprises a first screw conveying member 131 and a second screw conveying member 132, the first screw conveying member 131 is rotatably arranged in the screening tank 140, one end of the first screw conveying member 131 is arranged close to the first-stage storage tank 170 and used to convey the slurry and the sludge in the screening tank 140 to the first-stage storage tank 170, and the second screw conveying member 132 is rotatably arranged in the first-stage conveying tank 180, one end of the second screw conveying member 132 extends into the inner cavity of the first-stage storage tank 170 and used to convey the slurry and the sludge in the first-stage storage tank 170 out of the sludge discharge port 120.

[0094] The screening tank provided by the present application is provided with the first-stage storage tank 170, so that the sludge stored in the screening assembly 100 when the intermediate assembly 200 is in the sludge discharge stage can be increased, and the situation that the sludge is too much to block the first-stage screw conveying assembly when the first gate member 310 is closed can be avoided.

[0095] ​Specifically in the embodiment, the first screw conveying member 131 is used to convey the slag stones in the screening box 140 to the first-stage stone storage box 170, and in a specific embodiment, the first screw conveying member 131 is rotatably arranged at a position close to the screen mesh hole plate 160 of the screening box 140, that is, the first screw conveying member 131 can crush the slag stones in the process of conveying the slag stones, and the first screw conveying member 131 can at any time drive the just crushed slag stones that can pass through the screen mesh hole plate 160 to move through the screen mesh hole plate 160 and fall into the circulating box 150.

[0096] As shown in the drawings, Figures 1 to 3 in a specific embodiment,

[0097] The inner cavity of the screening box 140 is connected with the inner cavity of the first-stage stone storage box 170 through an opening at the top of the first-stage stone storage box 170, and one end of the first screw conveying member 131 close to the first-stage stone storage box 170 is higher than the other end of the first screw conveying member 131 close to the slag inlet 110, so as to lift and convey the slag slurry and slag stones in the screening box 140 into the inner cavity of the first-stage stone storage box 170.

[0098] The screening box provided by the application can make the slag stones conveyed by the first screw conveying member 131 fall into the first-stage stone storage box 170 by virtue of the gravity, so as to avoid the situation that a large amount of slag stones are blocked at the end of the screening box 140 close to the first-stage stone storage box 170 when the first screw conveying member 131 horizontally conveys.

[0099] As shown in the drawings, Figure 5 in a specific embodiment,

[0100] The transfer assembly 200 comprises the second-stage stone storage box 240 and the second-stage conveying box 250 connected with each other, the first channel 210 is arranged at the top of the second-stage stone storage box 240, the second channel 220 is arranged at the end of the second-stage conveying box 250 away from the second-stage stone storage box 240, the second-stage screw conveying assembly 230 is rotatably arranged in the second-stage conveying box 250, and one end of the second-stage screw conveying assembly 230 extends into the inner cavity of the second-stage stone storage box 240, so as to convey the slag slurry and slag stones in the second-stage stone storage box 240 out of the second channel 220.

[0101] The screening box provided by the application can increase the stored slag stones of the transfer assembly 200 in the normal conveying stage, improve the slag discharge amount of the single transfer assembly 200, and improve the slag discharge efficiency of the screening box provided by the application, and avoid the situation that the first-stage screw conveying assembly is stuck due to too much accumulation of slag stones when the first gate member 310 is closed.

[0102] Specifically in the embodiment, the secondary screw conveying assembly 230 is rotatably arranged in the secondary conveying box 250, one end of the secondary screw conveying assembly 230 extends into the inner cavity of the secondary slag storage box 240, so as to send out the slag in the inner cavity of the secondary slag storage box 240 through the second channel 220, that is, to discharge the slag outside the screening box. In the embodiment, the secondary slag storage box 240 and the side wall of the primary slag storage box 170 are both provided with an openable and closable maintenance opening, so as to facilitate the maintenance personnel to enter the secondary slag storage box 240 and the primary slag storage box 170 to clean and maintain.

[0103] As shown in the drawings, Figure 5 in a specific embodiment,

[0104] The one end of the primary conveying box 180, at which the slag discharge port 120 is arranged, is higher than the one end of the primary conveying box 180, at which the primary slag storage box 170 is connected, so that the slag discharge port 120 is connected with the first channel 210, and the one end of the second screw conveying member 132, which is close to the slag discharge port 120, is higher than the one end of the second screw conveying member 132, which extends into the primary slag storage box 170, so as to lift and convey the slag and slurry in the primary slag storage box 170 to the secondary slag storage box 240.

[0105] The screening box provided by the application lifts the one end of the primary conveying box 180, at which the slag discharge port 120 is arranged, so that the slag discharge port 120 is connected with the first channel 210 located at the top of the secondary slag storage box 240, and the one end of the second screw conveying member 132, which is close to the slag discharge port 120, is lifted, so that the slag conveyed by the second screw conveying member 132 can fall into the secondary slag storage box 240 under the action of gravity, thereby avoiding the problem that the second screw conveying member 132 is horizontally placed and the slag and slurry are conveyed from the primary slag storage box 170, and a large amount of slag is blocked at the slag discharge port 120.

[0106] As shown in the drawings, Figure 5 in a specific embodiment,

[0107] The one end of the secondary slag storage box 240, at which the second channel 220 is arranged, is higher than the one end of the secondary conveying box 250, at which the secondary slag storage box 240 is connected, and the one end of the secondary screw conveying assembly 230, which is close to the second channel 220, is higher than the one end of the secondary screw conveying assembly 230, which extends into the secondary slag storage box 240, so as to lift and convey the slag and slurry in the secondary slag storage box 240 to the second channel 220.

[0108] The screening box provided by the application can make the slag stones conveyed by the secondary spiral conveying assembly 230 fall out of the screening box outside through the action of gravity, so as to avoid the problem that a large amount of slag stones are blocked at the second channel 220 when the secondary spiral conveying assembly 230 is horizontally placed and the slag stones are conveyed.

[0109] As shown in the drawings, Figure 5 in an embodiment,

[0110] The pressure stabilizing assembly 300 further comprises a plurality of openable and closable exhaust pipelines 340, which are respectively connected to the top of the secondary slag storage box 240 and the top of the secondary conveying box 250, and are used to exhaust the gas in the inner cavity of the secondary slag storage box 240 and the gas in the inner cavity of the secondary conveying box 250.

[0111] The screening box provided by the application can make the slag stones conveyed by the secondary spiral conveying assembly 230 fall out of the screening box outside through the action of gravity, so as to avoid the problem that a large amount of slag stones are blocked at the second channel 220 when the secondary spiral conveying assembly 230 is horizontally placed and the slag stones are conveyed.

[0112] As shown in the drawings, Figure 6 in an embodiment,

[0113] The pressure stabilizing assembly 300 further comprises an exhaust device 350, the bottom of the exhaust device 350 is provided with an inlet 351 and an outlet 352 which are connected to the inner cavity of the exhaust device 350, and the top of the exhaust device 350 is provided with an exhaust port 353 which is connected to the inner cavity of the exhaust device 350.

[0114] The inlet 351 is connected to the exhaust pipeline 340, so as to input the slurry and gas in the inner cavity of the transfer assembly 200 into the inner cavity of the exhaust device 350, the exhaust port 353 is provided with a one-way exhaust assembly 354, so as to exhaust the gas in the inner cavity of the exhaust device 350, and the outlet 352 is connected to the slurry separation station, so as to convey the slurry in the inner cavity of the exhaust device 350 to the ground.

[0115] The exhaust device 350 of the screening box provided by the present invention is a gas transfer station for the screening box, used to completely exhaust the gas in the transfer component 200. At the same time, the exhaust device 350 is provided with an outlet 352 connected to the mud-water separation station on the ground, so as to transport the slurry extracted along with the gas in the inner cavity of the transfer component 200 to the mud-water separation station through the outlet 352, thereby improving the recycling rate of the slurry.

[0116] Specifically, in this embodiment, the exhaust device 350 is generally a tank structure. The outlet 352 and the inlet 351 are located at the bottom of the exhaust device 350 to facilitate the flow of liquid. The exhaust port 353 is located at the top of the exhaust device 350 to facilitate the automatic discharge of gas from the exhaust device 350. A one-way exhaust component 354 is provided at the exhaust port 353, that is, this component can only discharge gas in one direction. Gas located outside the exhaust device 350 cannot enter the exhaust device 350, and liquid inside the exhaust device 350 cannot overflow from the exhaust device 350 through the one-way exhaust component 354.

[0117] like Figure 6 As shown, in one specific embodiment,

[0118] The pressure stabilizing assembly 300 also includes a plurality of pressure measuring elements 360, which are respectively disposed in the inner cavity of the screening assembly 100 and the inner cavity of the transfer assembly 200. The pressure measuring elements 360 are electrically connected to the infusion pipeline 330, the first valve 310 and the second valve 320.

[0119] When the first gate 310 and the second gate 320 are in the closed state, and the pressure in the inner cavity of the screening component 100 is greater than the pressure in the inner cavity of the transfer component 200, the infusion pipeline 330 can transport the pressurized slurry in the screening component 100 to the inner cavity of the transfer component 200.

[0120] The screening box provided by the present invention, by electrically connecting the pressure measuring element 360 to the infusion pipeline 330, the first gate 310 and the second gate 320, facilitates the operator to monitor the pressure in the transfer component 200. The opening and closing of the infusion pipeline 330, the first gate 310 or the second gate 320 can be automatically controlled by electronic program, which solves the safety problems of automated slag discharge and the safety risks of cavitation mud-water circulation system.

[0121] In one specific embodiment, the specific operation path of the screening box is as follows:

[0122] In the normal conveying stage, when the pressure in the inner cavity of the screening assembly 100 is equal to the pressure in the inner cavity of the transfer assembly 200, the second gate 320 blocks the second channel 220, and the first gate 310 is in an open state, so that the slurry and the residue conveyed by the primary screw conveying assembly in the screening assembly 100 can enter the inner cavity of the transfer assembly 200 under the working pressure of the slurry shield tunneling machine;

[0123] In the residue discharging stage, the first gate 310 is in a closed state, and the second gate 320 is in an open state, so that the inner cavity of the transfer assembly 200 is connected to the atmosphere to release pressure. At this time, the pressure in the inner cavity of the screening assembly 100 is greater than the pressure in the inner cavity of the transfer assembly 200.

[0124] In the liquid supplementing stage, after the residue in the transfer assembly 200 is cleaned, the second gate 320 is closed to make the inner cavity of the transfer assembly 200 in a sealed state. In this stage, the liquid supplementing pipeline 330 can be opened to convey the slurry in the screening assembly 100 to the inner cavity of the sealed transfer assembly 200. At this time, the pressure in the inner cavity of the transfer assembly 200 gradually increases from being less than the pressure in the inner cavity of the screening assembly 100 to being equal to the pressure in the inner cavity of the screening assembly 100. When the liquid pressure in the transfer assembly 200 is consistent with the liquid pressure in the screening assembly 100, the first gate 310 is opened.

[0125] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A screening box, characterized in that, The application relates to a slurry screening box. The slurry screening box comprises a screening assembly (100) having a residue inlet (110) and a residue outlet (120) at two ends respectively, a first-stage screw conveying assembly arranged in the inner cavity of the screening assembly (100), a transfer assembly (200) having a first channel (210) and a second channel (220) at two ends respectively, the first channel (210) being connected with the residue outlet (120), the second channel (220) being connected with the outside of the screening box, and a second-stage screw conveying assembly (230) arranged in the inner cavity of the transfer assembly (200). The transfer assembly (200) comprises a first gate (310) and a second gate (320) arranged in the first channel (210) and the second channel (220) respectively, the first gate (310) and the second gate (320) being capable of sealing the inner cavity of the transfer assembly (200), and a liquid conveying pipeline (330) connected between the screening assembly (100) and the transfer assembly (200) in an openable and closable mode, the liquid conveying pipeline (330) being capable of conveying the slurry in the screening assembly (100) into the inner cavity of the transfer assembly (200). The screening assembly (100) comprises a screening box (140) and a circulating box (150), the screening box (140) and the circulating box (150) being connected in a stacked mode from top to bottom, the residue inlet (110) being arranged at the top of the screening box (140), one end of the first-stage screw conveying assembly being arranged in the screening box (140), and a screen mesh hole plate (160) being arranged between the screening box (140) and the circulating box (150), the inner cavity of the screening box (140) being connected with the inner cavity of the circulating box (150) through the screen mesh hole plate (160).

2. The slurry screening box according to claim 1, wherein the screening assembly (100) further comprises a flushing pipe (151) and a slurry discharge pipe (152), the circulating box (150) having a slurry inlet (153) and a slurry outlet (154) at opposite ends respectively, the flushing pipe (151) being connected with the slurry inlet (153) and used for inputting pressure fluid into the inner cavity of the circulating box (150), and the slurry discharge pipe (152) being connected with the slurry outlet (154) and used for conveying the residue and the slurry, which are settled in the inner cavity of the circulating box (150) through the screen mesh hole plate (160), to a mud-water separation station on the ground.

3. The slurry screening box according to claim 1 or 2, wherein the screening assembly (100) further comprises a first-stage residue storage box (170) and a first-stage conveying box (180) connected in sequence, the first-stage conveying box (180) and the screening box (140) being connected with the first-stage residue storage box (170) respectively, and the residue outlet (120) being arranged at one end of the first-stage conveying box (180) away from the first-stage residue storage box (170). ​ ​ ​ The primary screw conveying assembly comprises a first screw conveying member (131) and a second screw conveying member (132), the first screw conveying member (131) is rotatably arranged in the screen box (140), one end of the first screw conveying member (131) is arranged close to the primary stone storage box (170) to convey the slurry and stone in the screen box (140) into the primary stone storage box (170), the second screw conveying member (132) is rotatably arranged in the primary conveying box (180), one end of the second screw conveying member (132) extends into the inner cavity of the primary stone storage box (170) to convey the slurry and stone in the primary stone storage box (170) out of the slag discharge port (120).

4. The screen box according to claim 3, wherein, the inner cavity of the screen box (140) is connected with the inner cavity of the primary stone storage box (170) through an opening at the top of the primary stone storage box (170), and the end of the first screw conveying member (131) close to the primary stone storage box (170) is higher than the end of the first screw conveying member (131) close to the slag inlet (110) to lift and convey the slurry and stone in the screen box (140) into the inner cavity of the primary stone storage box (170).

5. The screen box according to claim 4, wherein, the transfer assembly (200) comprises a secondary stone storage box (240) and a secondary conveying box (250) connected with each other, the first channel (210) is arranged at the top of the secondary stone storage box (240), the second channel (220) is arranged at the end of the secondary conveying box (250) away from the secondary stone storage box (240), and the secondary screw conveying assembly (230) is rotatably arranged in the secondary conveying box (250), one end of the secondary screw conveying assembly (230) extends into the inner cavity of the secondary stone storage box (240) to convey the slurry and stone in the secondary stone storage box (240) out of the second channel (220).

6. The screen box according to claim 5, wherein, the end of the primary conveying box (180) where the slag discharge port (120) is arranged is higher than the end of the primary conveying box (180) connected with the primary stone storage box (170) to make the slag discharge port (120) connected with the first channel (210), and the end of the second screw conveying member (132) close to the slag discharge port (120) is higher than the end of the second screw conveying member (132) extending into the primary stone storage box (170) to lift and convey the slurry and stone in the primary stone storage box (170) into the secondary stone storage box (240).

7. The screen box according to claim 5, wherein, The second channel (220) of the secondary storage tank (240) is higher than the end of the secondary conveying tank (250) connected to the secondary storage tank (240), and the end of the secondary spiral conveying assembly (230) close to the second channel (220) is higher than the end of the secondary spiral conveying assembly (230) extending into the secondary storage tank (240), so as to lift and convey out the sludge and slag in the secondary storage tank (240) through the second channel (220).

8. The screening box according to claim 5, wherein, The pressure stabilizing assembly (300) further comprises a plurality of openable and closable exhaust pipelines (340) connected to the top of the secondary storage tank (240) and the top of the secondary conveying tank (250) respectively, so as to discharge the gas in the inner cavity of the secondary storage tank (240) and the gas in the inner cavity of the secondary conveying tank (250).

9. The screening box according to claim 8, wherein, The pressure stabilizing assembly (300) further comprises an exhaust device (350) having an inlet (351) and an outlet (352) at the bottom thereof, and an exhaust port (353) at the top thereof, wherein the inlet (351) is connected to the exhaust pipeline (340) to input the slurry and gas in the inner cavity of the transfer assembly (200) into the inner cavity of the exhaust device (350), the exhaust port (353) is provided with a one-way exhaust assembly (354) to exhaust the gas in the inner cavity of the exhaust device (350), and the outlet (352) is connected to a sludge-water separation station to convey the slurry in the inner cavity of the exhaust device (350) to the ground.

10. The screening box according to claim 1, wherein, The pressure stabilizing assembly (300) further comprises a plurality of pressure measuring elements (360) arranged in the inner cavities of the screening assembly (100) and the transfer assembly (200) respectively, and the pressure measuring elements (360) are electrically connected to the liquid conveying pipeline (330), the first gate (310) and the second gate (320); when the first gate (310) and the second gate (320) are in a closed state, and the pressure in the inner cavity of the screening assembly (100) is greater than the pressure in the inner cavity of the transfer assembly (200), the liquid conveying pipeline (330) can convey the pressure slurry in the screening assembly (100) into the inner cavity of the transfer assembly (200). ​ ​

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