CN217409911U - Slurry shield constructs machine slabstone screening plant - Google Patents

Abstract

The utility model discloses a slurry shield machine slag stone screening device, which aims to solve the technical problem that the construction efficiency is influenced because the large-particle-size slag stone in the existing stone-picking box is frequently fully accumulated to cause grid blockage; the device comprises a pulp inlet pipe, a screening box body and a quarrying cylinder; the top of the screening box body is communicated with the pulp inlet pipe, and the bottom of the screening box body is installed on the quarrying cylinder; the screening box body comprises a filtering component, a flushing pipe and a blanking pipe which are arranged in the screening box body; the filtering component comprises a pushing piece and a grid arranged at the bottom of the pushing piece, the flushing pipe is arranged at the bottom of the grid, and the blanking pipe is communicated between the screening box body and the quarrying barrel; the utility model discloses can filter the slabstone size in the screening box fast, reduce the risk that the grid blockked up and frequently clear up the amount of labour of quarrying a section of thick bamboo, promote the efficiency that the slurry shield tunneled simultaneously greatly.

Description

Slurry shield constructs machine slabstone screening plant

Technical Field

The utility model relates to a shield constructs and establishes construction equipment technical field, concretely relates to mud water shield constructs machine slabstone screening plant.

Background

With the continuous growth of the infrastructure of China, the utilization of underground space is also the key direction of the current domestic construction research, and with the progress of shield technology, the development of underground space becomes more and more convenient and safer, and the shield used in the underground engineering of China is mainly divided into an earth pressure balance shield and a muddy water balance shield. The slurry balance shield stabilizes the front soil body by the slurry with adjustable pressure when the shield cuts the front soil body, and because the slurry balance shield is completely in a sealing state in the whole tunneling process, the stability of the slurry balance shield to the stratum is better than that of the slurry balance shield, the slurry balance shield is more and more popular by virtue of better stability and more reliable safety. The slurry balance shield cuts the soil in front through the cutter head, the cut soil and the slurry of the excavation bin are mixed and then enter the slurry discharge pipeline through the slurry door arranged at the bottom of the shield, and then the mixture is conveyed to the ground slurry treatment field through the slurry discharge pipeline, and the slurry conveyed to the ground is separated by the slurry treatment field.

Because the slag discharge of the slurry balance shield completely depends on the circulating flow of slurry, a large amount of pebbles or crushed rock blocks with the particle size of 20-250 mm can be generated on the cutting tunnel face in the tunneling process of sandy gravel stratum, round gravel stratum, strongly weathered rock stratum, fault fracture zone, calcareous mudstone, siltstone and other strata, and the large-particle-size particles can enter a slurry pipeline through slurry circulation after entering a slurry bin and are pumped to ground separation equipment or a slag yard through a slurry discharge pump. Generally, a horizontal centrifugal pump is adopted as a slurry discharge pump, and the inlet and the outlet of the pump are provided with variable diameters, so that the passing particle size of the pump is limited within 180mm, and pebbles or stones larger than 180mm are clamped at the inlet or the outlet of the pump to cause the blockage of the pump. Therefore, when a stratum containing large-particle-size particles is tunneled, a quarrying box is often required to be arranged in front of a pump of a slurry pump, and a grid is arranged in the quarrying box to filter and collect particles larger than 180 mm.

However, in the process of implementing the technical solution in the embodiment of the present application, the inventors of the present application find that the above-mentioned technology has at least the following technical problems: the quarrying case can not sieve the granule, leads to the instantaneous grid jam behind the bold granule striking grid, carries the high-speed mud (speed about 3.4 m/s) of a large amount of granules in the mud pipe and also can stop flowing in the twinkling of an eye, and a large amount of tiny particles also can fall into the quarrying incasement, leads to the quarrying case to be piled up in the twinkling of an eye. Therefore, the shield tunneling efficiency is low, and the times for cleaning the quarrying boxes are more.

The information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is already known to a person skilled in the art.

Disclosure of Invention

The inventor discovers through research that: when the quarrying box collects the large-particle-size slag stones, the phenomenon that the large-particle-size slag stones block the aperture of the grating to cause the quarrying box to be instantly full can often occur, and the problem can be effectively solved by scraping the large-particle-size slag stones on the grating in time.

In view of at least one of the above technical problems, the present disclosure provides a slurry shield machine slag stone screening device that performs size screening on the slag stone particle diameter passing through a grid, and circulates in separate pipelines。

According to one aspect of the disclosure, a slurry shield machine slag stone screening device is provided, which comprises a slurry inlet pipe, a screening box body and a quarrying cylinder; the top of the screening box body is communicated with the pulp inlet pipe, and the bottom of the screening box body is arranged on the quarrying cylinder; the screening box body comprises a filtering component, a flushing pipe and a blanking pipe which are arranged in the screening box body; the filtering component comprises a pushing piece and a grating arranged at the bottom of the pushing piece, the flushing pipe is arranged at the bottom of the grating, and the blanking pipe is communicated between the screening box body and the quarrying cylinder; the slag stones with the aperture larger than that of the grating are pushed by the pushing piece to enter the blanking pipe and then fall into the quarrying cylinder, and the slag stones with the aperture smaller than that of the grating are discharged by the flushing pipe.

In some embodiments of the present disclosure, the pushing member is a hydraulic cylinder, and the bottom cylinder body is disposed at one end of the screening box body, and the movable end of the pushing member is provided with a scraper.

In some embodiments of the present disclosure, the scrapers are disposed perpendicular to the grating and scrape off slag adhered to the grating.

In some embodiments of the present disclosure, the grate is mounted inside the screening box and it is located directly below the slurry inlet pipe orifice.

In some embodiments of the present disclosure, the blanking tube is correspondingly disposed on two sides of the grid along a length direction of the pushing member, so that when the pushing member is pushed out or/and retracted, the slag stone is pushed into the blanking tube.

In some embodiments of the present disclosure, a discharge hole is provided on the quarrying cylinder for cleaning the slag stones in the quarrying cylinder.

One or more technical solutions provided in the embodiments of the application have at least the following technical effects or advantages:

1. because the hydraulic cylinder and the scraper are additionally arranged at the top of the grid, large-particle-size slag stones staying on the grid can be cleaned in time, the technical problem that the stone mining box needs to be cleaned frequently due to blockage of the large-particle-size slag stones in the prior art is effectively solved, the working efficiency of slurry shield tunneling is improved, and the construction period is shortened.

2. Because the blanking pipes are respectively arranged on the two sides of the grating, when the hydraulic cylinder drives the scraper plate to carry out slag stone treatment, the pushing of the slag stone can be bidirectionally realized, the cleaning speed of the large-particle-size slag stone is accelerated, and the risk of grating blockage is reduced.

Drawings

Fig. 1 is a schematic view of an internal structure of a ballast screening device for a slurry shield machine in an embodiment of the present application.

Fig. 2 is one of schematic structural diagrams of a ballast screening device for a slurry shield machine in an embodiment of the present application.

Fig. 3 is a second schematic structural view of a ballast screening device for a slurry shield machine in an embodiment of the present application.

In the above figures, 1, a pulp inlet pipe; 2. screening the box body; 21. a hydraulic cylinder; 22. a squeegee; 23. flushing the tube; 24. a blanking pipe; 25. a grid; 3. Quarrying the stone cylinder; 31. and (4) a discharge port.

Detailed Description

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application. The term "connected" and "coupled" when used in this application includes both direct and indirect connections (couplings), unless otherwise specified.

This application embodiment has solved current quarrying case and can not sieve the slabstone through providing a muddy water shield machine slabstone screening plant, leads to the big particle size slabstone to strike and instantaneously causes the grid behind the grid to block up, and a large amount of small particle size slabstones also fall into the quarrying case, cause the quarrying case to pile up, need clear up many times and influence tunnelling efficiency.

The technical scheme in the embodiment of the application does not solve the problems, and the general idea is as follows: the particle size of the slag stones entering the quarrying cylinder is further screened, and the large-particle-size slag stones accumulated on the grids are timely scraped, so that the large-particle-size slag stones timely fall into the quarrying cylinder; the small-particle-size slag stones are discharged from the flushing pipe and are conveyed to the ground through a pipeline after passing through a slurry discharge pump.

For better understanding of the technical solutions of the present application, the technical solutions will be described in detail below with reference to the drawings and specific embodiments.

Example one

The example discloses a slurry shield machine slag stone screening device, which comprises a slurry inlet pipe 1, a screening box body 2 and a quarrying cylinder 3, and is shown in figures 2 to 3.

The top of the screening box body 2 is provided with a slurry inlet communicated with the slurry inlet pipe 1, and the pipe orifice of the slurry inlet pipe 1 is connected with the slurry inlet arranged on the screening box body 2 through a flange, so that the connection sealing performance between the pipe orifices is ensured, and slurry leakage is prevented; the bottom of the screening box body 2 is arranged on the quarrying cylinder 3.

A filtering component, a flushing pipe 23 and a blanking pipe 24 for filtering and screening the slag stones are arranged in the screening box body 2; referring to fig. 1, the filter assembly comprises a pushing member mounted on the inner wall of the screening box 2 and a grating 25 also mounted on the inner wall of the screening box 2 and located below the pushing member; the pushing piece is a hydraulic cylinder 21, a cylinder body at the bottom of the pushing piece is fixedly arranged at one end of the screening box body 2, a scraper 22 is arranged at the end part of a movable telescopic end of the pushing piece, the scraper 22 is used for cleaning large-particle-size slag stones on a grid 25 arranged below the hydraulic cylinder 21, and the scraper 22 and the grid 25 are vertically arranged correspondingly to ensure the high efficiency of cleaning the slag stones; the grid 25 sets up screening box 2 is inside, and it just is right under advancing the thick liquid mouth to make on the mud that advances the thick liquid pipe 1 and carry just should fall into the grid 25 of below behind the thick liquid mouth that advances of screening box 2, guarantee in time to sieve the sediment grain diameter.

The flushing pipe 23 is arranged under the grating 25, a pipe orifice at one end of the flushing pipe is communicated with the bottom of the grating 25, the other end of the flushing pipe is communicated with a slurry pump through a pipeline, and the small-particle-size slag stones are directly conveyed to a slurry discharge pump through the flushing pipe 23 and are prevented from entering the quarrying cylinder 3, so that the quarrying cylinder 3 is easily full, and the tunneling efficiency is low due to frequent replacement.

The blanking pipe 24 is communicated between the screening box body 2 and the quarrying cylinder 3 and is used for conveying the slag stones with the aperture larger than that of the grating 25 into the quarrying cylinder 3; the blanking pipe 24 corresponds to two sides of the grating 25 along the length direction of the hydraulic cylinder 21, so that when the movable telescopic end of the hydraulic cylinder 21 drives the scraper 22 to clean the slag stones, the slag stones in two directions in the pushing process and the retracting process can be conveniently collected, the working efficiency of the hydraulic cylinder 21 is improved, meanwhile, the time of staying of the large-particle-size slag stones on the grating 25 is also reduced, and the situation of blocking the grating 25 is avoided.

Be equipped with discharge gate 31 on the quarrying section of thick bamboo 3 to carry out quick clearance to the slabstone in the quarrying section of thick bamboo 3.

The operation and use method of the slag stone screening device for the slurry shield machine comprises the following steps:

(1) the ball valve on the feed pipe is opened so that the slurry carries the ballast into the screen 25 inside the screening box 2.

(2) Small-particle-size slag stones in the slurry enter the flushing pipe 23 at the bottom through the grating 25 and are conveyed to a specified place through the slurry discharge pump; the large-particle-size slag stones larger than the aperture of the grating 25 stay on the grating 25, and meanwhile, the hydraulic cylinder 21 timely cleans the large-particle-size slag stones staying on the grating 25 through the scraper 22 arranged at the movable telescopic end of the hydraulic cylinder, so that the large-particle-size slag stones quickly enter the blanking pipes 24 on two sides of the grating 25 and finally fall into the quarrying barrel 3.

(3) When the large-particle-size slag stones in the quarrying cylinder 3 are to be fully accumulated, the slag stones in the quarrying cylinder 3 are timely cleaned through the discharge hole 31 arranged on the quarrying cylinder.

Through the concentrated, quick clearance to the big particle size ballast on the grid 25, avoided big particle size ballast to stop and cause the transport to block up on the grid 25 for the risk that the space in the quarrying section of thick bamboo 3 was piled up in the twinkling of an eye has reduced the number of times of clearance quarrying section of thick bamboo 3, and then has promoted the efficiency that the slurry shield tunneled, has alleviateed the construction amount of labour because of frequently clearing up quarrying section of thick bamboo 3 simultaneously.

Although preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made to the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present application and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (6)

1. A slurry shield machine slag stone screening device comprises a slurry inlet pipe, a screening box body and a stone mining cylinder; the top of the screening box body is communicated with the pulp inlet pipe, and the bottom of the screening box body is arranged on the quarrying cylinder; the screening box is characterized by comprising a filtering component, a flushing pipe and a blanking pipe which are arranged in the screening box; the filtering component comprises a pushing piece and a grating arranged at the bottom of the pushing piece, the flushing pipe is arranged at the bottom of the grating, and the blanking pipe is communicated between the screening box body and the quarrying cylinder; the slag stones with the aperture larger than that of the grating are pushed by the pushing piece to enter the blanking pipe and then fall into the quarrying cylinder, and the slag stones with the aperture smaller than that of the grating are discharged by the flushing pipe.

2. The device for screening the slag stones for the slurry shield machine according to claim 1, wherein the pushing piece is a hydraulic cylinder, a bottom cylinder body of the pushing piece is arranged at one end of the screening box body, and a movable end of the pushing piece is provided with a scraper.

3. The apparatus as claimed in claim 2, wherein the scraper is perpendicular to the grating and scrapes off the slag adhered to the grating.

4. The apparatus as claimed in claim 1, wherein the grid is installed inside the screening box and is located right below the opening of the slurry inlet pipe.

5. The apparatus as claimed in claim 1, wherein the blanking pipe is disposed at both sides of the grid along the length direction of the pushing member, so that the pushing member pushes the slag into the blanking pipe when being pushed out or/and retracted.

6. The apparatus as claimed in claim 1, wherein the quarrying cylinder is provided with a discharge port for cleaning the quarrying cylinder.

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