Screening box

Abstract

The invention provides a screening box which is characterized in that a slag inlet and a slag outlet which communicate with an inner cavity of a screening assembly are formed in the two opposite ends of the screening assembly correspondingly, and a first-stage spiral conveying assembly is arranged in the inner cavity of the screening assembly and used for conveying slag stone entering from the slag inlet out of the slag outlet; a first channel and a second channel which are communicated with an inner cavity of the transfer assembly are formed in the two ends of the transfer assembly respectively, the first channel is connected with the slag discharging opening, and a secondary spiral conveying assembly is arranged in the inner cavity of the transfer assembly so as to convey slag slurry and slag stone entering from the first channel out of the second channel; the first gate piece and the second gate piece are arranged in the first channel and the second channel in an openable and closable mode respectively, the first gate piece and the second gate piece can seal an inner cavity of the transfer assembly, the 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 slag slurry in the screening assembly into the inner cavity of the transfer assembly. The problem that when a slurry shield tunneling machine is used for tunnel construction with a large amount of large-particle slag stones, the slag stones are discharged without shutdown is solved.

Description

Technical Field

[0001] The invention relates to the technical field of shield machine equipment, and in particular to a screening box. Background Art

[0002] The description in this section merely provides background information related to the present disclosure and does not constitute prior art.

[0003] Since the particle size of the slurry pump in the circulation system of the slurry shield is limited, when constructing in composite strata, broken zones, pebble strata and other working conditions, the slurry pump is often blocked, which seriously affects the construction and excavation.

[0004] At present, measures such as adding a quarrying box and a screening box in front of the slurry pump are usually adopted. However, since the slurry shield machine needs to maintain a certain pressure (about 6 bar to 12 bar) during construction and the amount of slag discharged in each ring is large, if the machine is stopped to remove stones, the quarrying efficiency will be greatly reduced.

[0005] In recent years, with the improvement of the performance of the slurry shield, its high advantage in controlling the settlement level has been widely used in highway tunnels, broken zone formations, and crossing rivers and seas. However, large-particle slag in pebble formations and broken zone formations is still a difficulty in current construction. For example, the prior art of publication number "CN216714389U" provides a horizontal and vertical grid to improve the quarrying efficiency of large-particle slag, but it still does not solve the problem of large-particle slag without stopping the construction; for example, the prior art of publication number "CN112065430A" provides a roller-type screening box, which improves the quarrying efficiency and storage capacity of large-particle slag through multiple cam rollers, but it still does not solve the problem of large-particle slag stuck and many stones without stopping the construction.

[0006] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present invention and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are described in the background technology section of the present invention. Summary of the invention

[0007] The purpose of the present invention is to provide a screening box, which solves the problem of discharging slag without stopping the slurry shield machine during tunnel construction in which large-particle slag accounts for a large proportion.

[0008] The above-mentioned implementation objectives of the present invention are mainly achieved by the following technical solutions:

[0009] The present invention provides a screening box, comprising:

[0010] A screening component, with a slag inlet and a slag discharge port respectively opened at both ends thereof and connected to its inner cavity, and a first-stage screw conveying component is arranged in the inner cavity of the screening component;

[0011] A transfer component, wherein a first channel and a second channel connected to the inner cavity are respectively provided at two ends thereof, wherein the first channel is connected to the slag discharge port, and the second channel is connected to the outside of the screening box, and the inner cavity of the transfer component is provided with a secondary screw conveying component;

[0012] A pressure stabilizing component, the pressure stabilizing component includes a first gate member, a second gate member and a liquid infusion pipeline, the first gate member and the second gate member are respectively arranged in the first channel and the second channel, the first gate member and the second gate member can seal the inner cavity of the transfer component, the liquid infusion pipeline can be opened and closed and connected between the screening component and the transfer component, and the liquid infusion pipeline can transport the slurry in the screening component to the inner cavity of the transfer component.

[0013] In a specific embodiment,

[0014] The screening assembly includes a screen box and a circulating flow box, the screen box and the circulating flow box are stacked and connected from top to bottom, the slag inlet is opened at the top of the screen box, one end of the first-stage spiral conveying assembly is located in the screen box, a screen mesh plate is provided between the screen box and the circulating flow box, and the inner cavity of the screen box is connected with the inner cavity of the circulating flow box through the screen mesh plate.

[0015] In a specific embodiment,

[0016] The screening assembly also includes a flushing pipe and a slurry discharge pipe. A slurry inlet and a slurry outlet are respectively provided at opposite ends of the circulating flow box. The flushing pipe is connected to the slurry inlet for inputting pressure fluid into the inner cavity of the circulating flow box. The slurry discharge pipe is connected to the slurry outlet for transporting the slag and slurry that have settled into the inner cavity of the circulating flow box through the screen mesh plate to a mud-water separation station on the ground.

[0017] In a specific embodiment,

[0018] The screening assembly also includes a connected primary stone storage box and a primary conveying box, the primary conveying box and the screening box are respectively connected to the primary stone storage box, and the slag discharge port is opened at one end of the primary conveying box away from the primary stone storage box;

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

[0020] In a specific embodiment,

[0021] The inner cavity of the screen box is connected with the inner cavity of the first-level stone storage box through an opening located at the top of the first-level stone storage box. The end of the first spiral conveyor close to the first-level stone storage box is higher than the end of the first spiral conveyor close to the slag inlet, so as to lift the slag slurry and slag in the screen box and convey them to the inner cavity of the first-level stone storage box.

[0022] In a specific embodiment,

[0023] The transfer component includes a connected secondary stone storage box and a secondary conveying box, the first channel is opened at the top of the secondary stone storage box, the second channel is opened at one end of the secondary conveying box away from the secondary stone storage box, the secondary screw conveying component is rotatably arranged in the secondary conveying box, and one end of the secondary screw conveying component extends into the inner cavity of the secondary stone storage box to convey the slurry and slag in the secondary stone storage box out of the second channel.

[0024] In a specific embodiment,

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

[0026] In a specific embodiment,

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

[0028] In a specific embodiment,

[0029] The pressure stabilizing component also includes a plurality of openable and closable exhaust pipes, which are respectively connected to the top of the secondary stone storage box and the top of the secondary conveying box to discharge the gas in the inner cavity of the secondary stone storage box and the gas in the inner cavity of the secondary conveying box.

[0030] In a specific embodiment,

[0031] The voltage stabilizing assembly further includes an exhaust device, the bottom of the exhaust device is provided with an inlet and an outlet connected to the inner cavity of the exhaust device, and the top of the exhaust device is provided with an exhaust port connected to the inner cavity of the exhaust device;

[0032] Among them, the inlet is connected to the exhaust pipeline to input the slurry and gas in the inner cavity of the transfer component into the inner cavity of the exhaust device. A one-way exhaust component is provided in the exhaust port to discharge the gas in the inner cavity of the exhaust device. The outlet is connected to the mud-water separation station to transport the slurry in the inner cavity of the exhaust device to the ground.

[0033] In a specific embodiment,

[0034] The pressure stabilizing component further includes a plurality of pressure measuring elements, which are respectively arranged in the inner cavity of the screening component and the inner cavity of the transfer component, and the pressure measuring elements are electrically connected to the liquid delivery pipeline, the first gate member and the second gate member;

[0035] Among them, when the first gate member and the second gate member are in a closed state and the pressure in the inner cavity of the screening component is greater than the pressure in the inner cavity of the transfer component, the infusion pipeline can transport the pressure slurry in the screening component to the inner cavity of the transfer component.

[0036] Compared with the prior art, the technical solution of the present invention has the following characteristics and advantages:

[0037] The screening box provided by the present invention comprises a screening assembly as a component for receiving slag and stone output by a slurry shield machine, a transfer assembly as a component for transferring pressure changes in the screening box, and a pressure stabilizing device as a component for adjusting pressure changes in an inner cavity of the transfer assembly. The three are combined and operated together, so that the screening box can be maintained at a pressure that is the same as the working pressure of the pressure liquid in the slurry shield machine for working screening, thereby solving the problem that the existing slurry shield machine must be shut down to clean up large-sized stones accumulated in the screening box that cannot be carried away by the flushing liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0039] Figure 1 It is a structural diagram of the screening assembly of the screening box of the present invention;

[0040] Figure 2 A first side view of a screening assembly of a screening box of the present invention;

[0041] Figure 3 A second side view of the screening assembly of the screening box of the present invention;

[0042] Figure 4 A side view of a transfer assembly of a screening box of the present invention;

[0043] Figure 5 It is a structural diagram of the screening assembly and the transfer assembly of the screening box of the present invention;

[0044] Figure 6 It is a structural diagram of the exhaust device of the screening box of the present invention.

[0045] Description of Figure Numbers:

[0046] 100. Screening assembly;

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

[0048] 131. A first spiral conveying member; 132. A second spiral conveying member;

[0049] 140. Screen box;

[0050] 150. Circulation box;

[0051] 151. Flushing pipe; 152. Slurry discharge pipe;

[0052] 153. Slurry inlet; 154. Slurry outlet;

[0053] 160, screen plate;

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

[0055] 200, transfer component; 210, first channel; 220, second channel;

[0056] 230. Secondary screw conveyor assembly;

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

[0058] 300, voltage stabilizing components;

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

[0060] 330. Infusion pipeline; 340. Exhaust pipeline;

[0061] 350, exhaust device;

[0062] 351, import; 352, export;

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

[0064] 360. Pressure measuring element. DETAILED DESCRIPTION

[0065] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

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

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0068] like Figures 1 to 5 As shown, the present invention provides a screening box, comprising:

[0069] The screening component 100 has a slag inlet 110 and a slag outlet 120 at both ends thereof which are connected to the inner cavity thereof, and a first-stage screw conveying component is provided in the inner cavity of the screening component 100;

[0070] The transfer component 200 has a first channel 210 and a second channel 220 connected to its inner cavity at both ends, the first channel 210 is connected to the slag discharge port 120, and the second channel 220 is connected to the outside of the screening box. The inner cavity of the transfer component 200 is provided with a secondary screw conveying component 230;

[0071] The voltage stabilizing component 300 includes a first gate member 310, a second gate member 320 and a liquid delivery pipe 330. The first gate member 310 and the second gate member 320 are respectively arranged in the first channel 210 and the second channel 220. The first gate member 310 and the second gate member 320 can seal the inner cavity of the transfer component 200. The liquid delivery pipe 330 can be opened and closed and connected between the screening component 100 and the transfer component 200. The liquid delivery pipe 330 can transport the slurry in the screening component 100 to the inner cavity of the transfer component 200.

[0072] The screening box provided by the present invention has a screening component 100 as a component for the screening box to receive the slag and stone output by the slurry shield machine, a transfer component 200 as a component for transferring the pressure change of the screening box, and a pressure stabilizing device as a component for adjusting the pressure change of the inner cavity of the transfer component 200. The three are combined and operated together, so that the screening box can be maintained at the same pressure as the working pressure of the pressure liquid in the slurry shield machine for working screening, thereby solving the problem that the existing slurry shield machine must be shut down and the pressure must be released before cleaning the large-sized stones accumulated in the screening box that cannot be carried away by the flushing liquid.

[0073] Specifically in this embodiment, the screening component 100 is used to connect to the slag conveying port of the slurry shield main machine, wherein the slag inlet 110 is used to connect to the slag conveying port of the shield main machine, that is, the slag peeled off by the slurry shield main machine mixed with slurry enters the inner cavity of the screening component 100 from the slag conveying port. At this time, the pressure in the inner cavity of the screening component 100 is the same as the working pressure of the slurry shield machine, which may avoid fluid scouring caused by pressure difference, and may also avoid the presence of gas in the inner cavity of the screening component 100 due to the connection between the screening component 100 and the outside. The residual gas will flow between the equipment and cause the risk of cavitation and other hazards to the equipment of the shield machine and the equipment of the screening box.

[0074] In this embodiment, a slag inlet 110 and a slag discharge port 120 connected to the inner cavity of the screening component 100 are respectively opened at the opposite ends of the screening component 100, and a first channel 210 and a second channel 220 connected to the inner cavity of the transfer component 200 are respectively opened at the opposite ends of the transfer component 200.

[0075] In this embodiment, the first-stage screw conveying assembly and the second-stage screw conveying assembly 230 are generally composed of a screw conveyor. By adopting a screw conveyor, the slag can be driven to rise along the gap between the spiral blades of the screw conveyor. At the same time, the slag slurry can also utilize the gap between the spiral blades and the rotation of the spiral blades to move upward along the screw conveyor to the slag discharge port 120; at the same time, the first-stage screw conveying assembly can be equipped with wear-resistant alloy blades or steel plates to cut or crush the slag that cannot be stuck in the gap between the spiral blades, thereby further crushing the slag; in this embodiment, the screw conveyor is generally composed of a screw conveying shaft and a drive motor that drives the screw conveying shaft to rotate.

[0076] In this embodiment, the first-stage screw conveying assembly is used to convey the slurry and slag entering from the slag inlet 110 out of the slag outlet 120 , and the second-stage screw conveying assembly 230 is used to convey the slurry and slag entering from the first channel 210 out of the second channel 220 .

[0077] In this embodiment, the transfer component 200 is connected and communicated with the screening component 100. The first channel 210 of the transfer component 200 is used to communicate with the inner cavity of the screening component 100, so that the slag and slurry transported from the screening component 100 through the first-level screw conveying component can enter the inner cavity of the transfer component 200. The second channel 220 is used to communicate with the outside of the screening box, that is, the slag and slurry in the transfer component 200 can be output to the outside of the screening box through the second channel 220.

[0078] In this embodiment, the first gate member 310 can be opened and closed in the first channel 210, and the second gate member 320 can be opened and closed in the second channel 220. When the first gate member 310 and the second gate member 320 of the voltage stabilizing component 300 are in a closed state, the inner cavity of the transfer component 200 can be sealed.

[0079] In the normal conveying stage, the second gate 320 blocks the second channel 220, and the first gate 310 is in an open state, so that the slag and slurry conveyed from the screening assembly 100 by the primary screw conveying assembly can enter the inner cavity of the transfer assembly 200 under the working pressure of the slurry shield machine;

[0080] In the slag discharge stage, the first gate 310 is in a closed state, the second gate 320 is in an open state, and the inner cavity of the transfer assembly 200 is connected to the atmosphere for pressure relief. At this time, the operator can discharge and clean the slag and slurry in the transfer assembly 200 through the secondary screw conveying assembly 230. Since the first gate 310 is in a closed state, the screening assembly 100 can continue to receive the slurry and slag input from the slag conveying port without affecting the pressure of the screening assembly 100.

[0081] During the fluid replenishment stage, that is, after the slag in the transfer component 200 is cleaned, the second gate 320 is closed to make the inner cavity of the transfer component 200 in a closed state. During this stage, the liquid infusion pipeline 330 can be opened to transport the slurry in the screening component 100 to the closed inner cavity of the transfer component 200 through the liquid infusion pipeline 330. When the liquid pressure in the transfer component 200 is consistent with the liquid pressure in the screening component 100, the first gate 310 is opened to continue to transport the slag and slurry to the transfer component 200 through the first-stage screw conveying component, so as to achieve the cleaning of the slag that cannot be washed away by fluid without stopping the slurry shield machine.

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

[0083] The screening assembly 100 includes a screen box 140 and a circulating flow box 150, which are stacked and connected from top to bottom, and a slag inlet 110 is opened at the top of the screen box 140. One end of the primary spiral conveying assembly is located in the screen box 140. A screen mesh plate 160 is provided between the screen box 140 and the circulating flow box 150, and the inner cavity of the screen box 140 is connected to the inner cavity of the circulating flow box 150 through the screen mesh plate 160.

[0084] The screening box provided by the present invention, by setting the screen box 140 and the circulating flow box 150, can allow some small slag that can be washed away by the fluid to settle into the circulating flow box 150 through the screen mesh plate 160, waiting for further fluid flushing, thereby avoiding the situation where the first-level screw conveying assembly and the second-level screw conveying assembly 230 need to convey all the slag, resulting in the transfer and slag discharge efficiency not keeping up with the efficiency of the shield machine in generating slag.

[0085] Specifically in the present embodiment, the screen box 140 and the circulating flow box 150 are stacked up and down, the bottom of the screen box 140 is open, and the top of the circulating flow box 150 is open. The opening of the screen box 140 and the opening of the circulating flow box 150 are connected through the screen mesh plate 160, that is, part of the slag that can be washed away by the fluid can be screened out into the circulating flow box 150 through the gravity of the slag and the screen mesh plate 160.

[0086] In the present embodiment, the slag inlet 110 is opened at the top of the screen box 140, that is, the slag input into the screen box 140 can settle onto the screen mesh plate 160 under the action of gravity, and part of the slag passes through the screen mesh plate 160 under the action of gravity; in the present embodiment, one end of the first-stage spiral conveying assembly is located in the screen box 140, so as to convey the large slag that has not passed through the screen mesh plate 160 out of the slag discharge port 120.

[0087] like Figure 1 As shown, in one specific embodiment,

[0088] The screening assembly 100 also includes a flushing pipe 151 and a slurry discharge pipe 152. A slurry inlet 153 and a slurry outlet 154 are respectively provided at opposite ends of the circulating flow box 150. The flushing pipe 151 is connected to the slurry inlet 153 for inputting pressurized fluid into the inner cavity of the circulating flow box 150. The slurry discharge pipe 152 is connected to the slurry outlet 154 for transporting the slag and slurry that have settled into the inner cavity of the circulating flow box 150 through the screen mesh plate 160 to a mud-water separation station on the ground.

[0089] The screening box provided by the present invention is provided with a flushing pipe 151 and a slurry discharge pipe 152, so as to carry the slag and stone that have passed through the screen plate 160 to the mud-water separation station located on the ground for treatment through the pressure fluid.

[0090] Specifically in this embodiment, the flushing pipe 151 can use the slurry that has been separated from the mud and water separation station for transportation. In other embodiments, there is no limitation to this.

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

[0092] The screening assembly 100 further includes a first-level stone storage box 170 and a first-level conveying box 180 connected to each other. The first-level conveying box 180 and the screening box 140 are respectively connected to the first-level stone storage box 170. The slag discharge port 120 is provided at one end of the first-level conveying box 180 away from the first-level stone storage box 170.

[0093] The first-stage screw conveying assembly includes a first screw conveying member 131 and a second screw conveying member 132. The first screw conveying member 131 is rotatably disposed in the screen box 140. One end of the first screw conveying member 131 is disposed near the first-stage stone storage box 170 to convey the slurry and slag in the screen box 140 to the first-stage stone storage box 170. The second screw conveying member 132 is rotatably disposed in the first-stage conveying box 180. One end of the second screw conveying member 132 extends into the inner cavity of the first-stage stone storage box 170 to convey the slurry and slag in the first-stage stone storage box 170 out of the slag discharge port 120.

[0094] The screening box provided by the present invention can increase the slag stored in the screening component 100 when the transfer component 200 is in the slag discharge stage by setting a first-level stone storage box 170, thereby avoiding the situation where too much slag accumulates in the screening component 100 and jams the first-level screw conveying component when the first gate 310 is closed.

[0095] Specifically in this embodiment, the first spiral conveyor 131 is used to convey the slag in the screen box 140 to the primary stone storage box 170. In a specific embodiment, the first spiral conveyor 131 is rotatably disposed on the screen box 140 and is arranged close to the screen mesh plate 160, that is, the first spiral conveyor 131 can crush the slag during the process of conveying the slag, and the first spiral conveyor 131 can drive the slag that has just been crushed and can pass through the screen mesh plate 160 to move through the screen mesh plate 160 and settle into the circulation box 150 at any time by rotating.

[0096] like Figures 1 to 3 As shown, in one specific embodiment,

[0097] The inner cavity of the screen box 140 is connected with the inner cavity of the first-level stone storage box 170 through an opening located at the top of the first-level stone storage box 170. The end of the first spiral conveyor 131 close to the first-level stone storage box 170 is higher than the end of the first spiral conveyor 131 close to the slag inlet 110, so as to lift the slurry and slag in the screen box 140 and transport them to the inner cavity of the first-level stone storage box 170.

[0098] The screening box provided by the present invention, by raising one end of the first spiral conveyor 131 close to the primary stone storage box 170, can allow the slag conveyed by the first spiral conveyor 131 to fall into the primary stone storage box 170 under the action of gravity, thereby preventing a large amount of slag from being blocked in one end of the screening box 140 close to the primary stone storage box 170 when the first spiral conveyor 131 is conveying horizontally.

[0099] like Figure 5 As shown, in one specific embodiment,

[0100] The transfer component 200 includes a connected secondary stone storage box 240 and a secondary conveying box 250, a first channel 210 is opened at the top of the secondary stone storage box 240, and a second channel 220 is opened at one end of the secondary conveying box 250 away from the secondary stone storage box 240. The secondary spiral conveying component 230 is rotatably arranged in the secondary conveying box 250, and one end of the secondary spiral conveying component 230 extends into the inner cavity of the secondary stone storage box 240, so as to convey the slurry and slag in the secondary stone storage box 240 out of the second channel 220.

[0101] The screening box provided by the present invention can increase the slag stored in the transfer component 200 when it is in the normal conveying stage by setting a secondary stone storage box 240, thereby improving the slag discharge amount of the single transfer component 200 and the slag discharge efficiency of the screening box provided by the present invention; and avoid the situation where the screening component 100 is stuck due to excessive accumulation of slag when the first gate member 310 is closed.

[0102] Specifically in this embodiment, the secondary screw conveying assembly 230 is rotatably disposed in the secondary conveying box 250, and one end of the secondary screw conveying assembly 230 extends into the inner cavity of the secondary stone storage box 240 to convey the slag in the inner cavity of the secondary stone storage box 240 out of the second channel 220, that is, to discharge the slag out of the screening box. In this embodiment, the side walls of the secondary stone storage box 240 and the primary stone storage box 170 are both provided with an openable inspection port, which is convenient for maintenance personnel to enter the secondary stone storage box 240 and the primary stone storage box 170 for cleaning and maintenance.

[0103] like Figure 5 As shown, in one specific embodiment,

[0104] One end of the first conveying box 180 where a slag discharge port 120 is provided is higher than one end of the first conveying box 180 connected to the first stone storage box 170, so that the slag discharge port 120 is connected to the first channel 210, and one end of the second spiral conveying member 132 close to the slag discharge port 120 is higher than one end of the second spiral conveying member 132 extending into the first stone storage box 170, so as to lift the slag slurry and slag in the first stone storage box 170 and convey them to the second stone storage box 240.

[0105] The screening box provided by the present invention raises one end of the primary conveying box 180 where the slag discharge port 120 is opened so that the slag discharge port 120 can be connected to the first channel 210 located at the top of the secondary stone storage box 240, and correspondingly raises one end of the second spiral conveying member 132 close to the slag discharge port 120, so that the slag transported by the second spiral conveying member 132 can fall into the secondary stone storage box 240 from the first channel 210 under the action of gravity, thereby avoiding the problem that the second spiral conveying member 132 is placed horizontally and transports slag and slurry from the primary stone storage box 170, and a large amount of slag is blocked at the slag discharge port 120.

[0106] like Figure 5 As shown, in one specific embodiment,

[0107] One end of the secondary stone storage box 240 opening the second channel 220 is higher than the end of the secondary conveying box 250 connected to the secondary stone storage box 240, and the end of the secondary screw conveying assembly 230 close to the second channel 220 is higher than the end of the secondary screw conveying assembly 230 extending into the secondary stone storage box 240, so as to lift the slurry and slag in the secondary stone storage box 240 and convey them out of the second channel 220.

[0108] The screening box provided by the present invention, by raising one end of the secondary stone storage box 240 to open the second channel 220, and correspondingly raising one end of the secondary screw conveying assembly 230 close to the second channel 220, can enable the slag conveyed by the secondary screw conveying assembly 230 to fall out of the screening box from the second channel 220 by relying on the effect of gravity, thereby avoiding the problem of a large amount of slag being blocked in the second channel 220 when the secondary screw conveying assembly 230 is placed horizontally and conveying slag.

[0109] like Figure 5 As shown, in one specific embodiment,

[0110] The pressure stabilizing component 300 also includes a plurality of openable and closable exhaust pipes 340, which are respectively connected to the top of the secondary stone storage box 240 and the top of the secondary conveying box 250, so as to discharge the gas in the inner cavity of the secondary stone storage box 240 and the gas in the inner cavity of the secondary conveying box 250.

[0111] The screening box provided by the present invention can extract the gas in the secondary stone storage box 240 and the gas mixed slurry in the secondary conveying box 250 by setting the exhaust pipe 340. That is, in the rehydration stage, when the infusion pipeline 330 inputs slurry into the transfer component 200, the gas in the secondary stone storage box 240 and the gas in the secondary conveying box 250 are extracted, which is beneficial to fill the inner cavity of the transfer component 200 with slurry, avoiding problems such as cavitation that are easy to occur inside the transfer component 200 when there is residual gas.

[0112] like Figure 6 As shown, in one specific embodiment,

[0113] The voltage stabilizing assembly 300 further includes an exhaust device 350, the bottom of the exhaust device 350 is provided with an inlet 351 and an outlet 352 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 connected to the inner cavity of the exhaust device 350;

[0114] Among them, the inlet 351 is connected to the exhaust pipe 340, which is used to input the slurry and gas in the inner cavity of the transfer component 200 into the inner cavity of the exhaust device 350. The exhaust port 353 is provided with a one-way exhaust component 354, which is used to discharge the gas in the inner cavity of the exhaust device 350. The outlet 352 is connected to the mud and water separation station, which is used to transport 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 of the screening box, which is 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 and water separation station on the ground, so as to transport the slurry extracted when extracting the gas in the inner cavity of the transfer component 200 to the mud and water separation station through the outlet 352, thereby improving the recycling rate of the slurry.

[0116] Specifically in the present embodiment, the exhaust device 350 is generally a tank structure, the outlet 352 and the inlet 351 are provided at the bottom of the exhaust device 350 to facilitate the flow of liquid, the exhaust port 353 is provided at the top of the exhaust device 350 to facilitate the automatic discharge of gas from the exhaust device 350, and a one-way exhaust component 354 is provided at the exhaust port 353, that is, the component can only discharge gas in one direction, and the gas outside the exhaust device 350 cannot enter the exhaust device 350, and the liquid in the exhaust device 350 cannot overflow 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 component 300 further includes a plurality of pressure measuring elements 360, which are respectively disposed in the inner cavity of the screening component 100 and the inner cavity of the transfer component 200, and the pressure measuring elements 360 are electrically connected to the liquid delivery pipeline 330, the first gate 310 and the second gate 320;

[0119] Among them, 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 component 100 is greater than the pressure in the inner cavity of the transfer component 200, the infusion pipeline 330 can transport the pressure slurry in the screening component 100 to the inner cavity of the transfer component 200.

[0120] The screening box provided by the present invention electrically connects the pressure measuring element 360 with the liquid delivery pipeline 330, the first gate member 310 and the second gate member 320, so that the operator can monitor the pressure conditions in the transfer assembly 200, and can use an electronic program to automatically control the opening and closing of the liquid delivery pipeline 330, the first gate member 310 or the second gate member 320, thereby solving the safety issues of automated slag discharge and the safety risk issues of the cavitation mud and water circulation system.

[0121] In a 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 component 100 is equal to the pressure in the inner cavity of the transfer component 200, the second gate 320 blocks the second channel 220, and the first gate 310 is in an open state, so that the slag and slurry conveyed from the screening component 100 by the first-stage screw conveying component can enter the inner cavity of the transfer component 200 under the working pressure of the slurry shield machine;

[0123] In the slag discharge stage, the first gate 310 is in a closed state, the second gate 320 is in an open state, and the inner cavity of the transfer assembly 200 is connected to the atmosphere for pressure relief. 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] During the fluid replenishment stage, that is, after the slag in the transfer component 200 is cleaned up, the second gate 320 is closed to make the inner cavity of the transfer component 200 in a closed state. During this stage, the liquid infusion pipeline 330 can be opened to transport the slurry in the screening component 100 to the closed inner cavity of the transfer component 200 through the liquid infusion pipeline 330. At this time, the pressure in the inner cavity of the transfer component 200 gradually increases from less than the pressure in the inner cavity of the screening component 100 to equal to the pressure in the inner cavity of the screening component 100. When the liquid pressure in the transfer component 200 is consistent with the liquid pressure in the screening component 100, the first gate 310 opens.

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

Claims

1. A screening box, characterized in that: include: A screening component (100) is provided with a slag inlet (110) and a slag outlet (120) respectively at two ends thereof and connected to its inner cavity, and a primary screw conveying component is provided in the inner cavity of the screening component (100); The transfer component (200) has a first channel (210) and a second channel (220) respectively opened at both ends thereof and connected to its inner cavity, the first channel (210) is connected to the slag discharge port (120), the second channel (220) is connected to the outside of the screening box, and the inner cavity of the transfer component (200) is provided with a secondary screw conveying component (230); A pressure stabilizing component (300), the pressure stabilizing component (300) comprising a first gate member (310), a second gate member (320) and a liquid delivery pipeline (330), the first gate member (310) and the second gate member (320) being respectively arranged in the first channel (210) and the second channel (220), the first gate member (310) and the second gate member (320) being capable of sealing the inner cavity of the transfer component (200), the liquid delivery pipeline (330) being openably connected between the screening component (100) and the transfer component (200), and the liquid delivery pipeline (330) being capable of delivering slurry in the screening component (100) to the inner cavity of the transfer component (200).

2. The screening box according to claim 1, characterized in that: The screening assembly (100) comprises a screen box (140) and a circulating flow box (150); the screen box (140) and the circulating flow box (150) are stacked and connected from top to bottom; the slag inlet (110) is opened 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 plate (160) is provided between the screen box (140) and the circulating flow box (150); and the inner cavity of the screen box (140) is connected to the inner cavity of the circulating flow box (150) through the screen mesh plate (160).

3. The screening box according to claim 2, characterized in that: The screening assembly (100) further comprises a flushing pipe (151) and a slurry discharge pipe (152). The two opposite ends of the circulating box (150) are respectively provided with a slurry inlet (153) and a slurry outlet (154). The flushing pipe (151) is in communication with the slurry inlet (153) for inputting a pressure fluid into the inner cavity of the circulating box (150). The slurry discharge pipe (152) is in communication with the slurry outlet (154) for transporting the slag and slurry that have settled into the inner cavity of the circulating box (150) through the screen mesh plate (160) to a mud-water separation station on the ground.

4. The screening box according to claim 2 or 3, characterized in that: The screening assembly (100) further comprises a connected primary stone storage box (170) and a primary conveying box (180), wherein the primary conveying box (180) and the screening box (140) are respectively connected to the primary stone storage box (170), and the slag discharge port (120) is provided at one end of the primary conveying box (180) away from the primary stone 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) for conveying the slurry and slag in the screen box (140) to 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) for conveying the slurry and slag in the primary stone storage box (170) out of the slag discharge port (120).

5. The screening box according to claim 4, characterized in that: The inner cavity of the screen box (140) is connected to the inner cavity of the first-level stone storage box (170) through an opening located at the top of the first-level stone storage box (170); an end of the first screw conveyor (131) close to the first-level stone storage box (170) is higher than an end of the first screw conveyor (131) close to the slag inlet (110), so as to lift the slag slurry and slag in the screen box (140) and convey them to the inner cavity of the first-level stone storage box (170).

6. The screening box according to claim 5, characterized in that: The transfer assembly (200) comprises a connected secondary stone storage box (240) and a secondary conveying box (250); the first channel (210) is opened at the top of the secondary stone storage box (240); the second channel (220) is opened at one end of the secondary conveying box (250) away from the secondary stone storage box (240); the secondary spiral conveying assembly (230) is rotatably arranged in the secondary conveying box (250); one end of the secondary spiral conveying assembly (230) extends into the inner cavity of the secondary stone storage box (240) to convey the slurry and slag in the secondary stone storage box (240) out of the second channel (220).

7. The screening box according to claim 6, characterized in that: One end of the primary conveying box (180) having the slag discharge port (120) is higher than one end of the primary conveying box (180) connected to the primary stone storage box (170), so that the slag discharge port (120) is connected to the first channel (210); one end of the second spiral conveying member (132) close to the slag discharge port (120) is higher than one end of the second spiral conveying member (132) extending into the primary stone storage box (170), so as to lift the slag slurry and slag in the primary stone storage box (170) and convey them to the secondary stone storage box (240).

8. The screening box according to claim 6, characterized in that: One end of the secondary stone storage box (240) opening the second channel (220) is higher than one end of the secondary conveying box (250) connected to the secondary stone storage box (240); one end of the secondary screw conveying assembly (230) close to the second channel (220) is higher than one end of the secondary screw conveying assembly (230) extending into the secondary stone storage box (240), so as to lift the slag slurry and slag in the secondary stone storage box (240) and convey them out of the second channel (220).

9. The screening box according to claim 6, characterized in that: The pressure stabilizing component (300) further comprises a plurality of openable and closable exhaust pipes (340), wherein the plurality of exhaust pipes (340) are respectively connected to the top of the secondary stone storage box (240) and the top of the secondary conveying box (250) for discharging the gas in the inner cavity of the secondary stone storage box (240) and the gas in the inner cavity of the secondary conveying box (250).

10. The screening box according to claim 9, characterized in that: The voltage stabilizing assembly (300) further comprises an exhaust device (350), wherein the bottom of the exhaust device (350) is provided with an inlet (351) and an outlet (352) which are in communication with 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 in communication with the inner cavity of the exhaust device (350); The inlet (351) is connected to the exhaust pipeline (340) to input the slurry and gas in the inner cavity of the transfer component (200) into the inner cavity of the exhaust device (350); the exhaust port (353) is provided with a one-way exhaust component (354) to discharge the gas in the inner cavity of the exhaust device (350); the outlet (352) is connected to the mud-water separation station to transport the slurry in the inner cavity of the exhaust device (350) to the ground.

11. The screening box according to claim 1, characterized in that: The pressure stabilizing component (300) further comprises a plurality of pressure measuring elements (360), the plurality of pressure measuring elements (360) being respectively arranged in the inner cavity of the screening component (100) and in the inner cavity of the transfer component (200), and the pressure measuring elements (360) being electrically connected to the liquid delivery pipeline (330), the first gate member (310) and the second gate member (320); When the first gate member (310) and the second gate member (320) are in a 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 liquid transfer pipeline (330) can transport the pressurized slurry in the screening component (100) to the inner cavity of the transfer component (200).

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