Mud-water separation assembly and shield tunneling machine

Abstract

The utility model relates to muddy water treatment, and particularly discloses a muddy water separation assembly and a shield tunneling machine. The mud-water separation assembly comprises a first circulation assembly and a second circulation assembly, the first circulating assembly comprises a first slurry storage tank and a first cyclone; a first area and a second area which are communicated with each other are arranged in the first slurry storage tank; a first filter screen is arranged between the first area and the second area; the first area is communicated with the liquid inlet end of the first cyclone; and the second area is communicated with an overflow port of the first cyclone. According to the scheme, the first area and the second area are arranged in the first slurry storage tank, so that slurry shunted by the first cyclone and slurry before shunting can be effectively distinguished, and the slurry in the first area can be effectively prevented from flowing into a component for a next process through the first filter screen; the mud-water separation effect is improved, and the situation of mud and sand deposition of parts in the next procedure is reduced.

Description

Technical Field

[0001] This application relates to the field of mud and water treatment technology, and in particular to a mud and water separation component and a tunnel boring machine. Background Technology

[0002] Slurry balance shield tunneling is a commonly used tunnel excavation technology. During the operation of the shield machine, slurry is used to resist the water pressure at the excavation face in order to maintain the stability of the excavation face. To achieve this, the slurry containing sand and soil discharged during the tunneling process needs to be separated in stages. The separated slurry is adjusted and transported back to the excavation face, while the separated sand and soil can be directly transported off-site.

[0003] Equipment used to treat the mud-containing slurry generated during tunneling is called a slurry separation unit. Downstream slurry separation units include those that perform primary separation and those that perform secondary separation. Taking a slurry separation unit that performs secondary separation as an example, it includes both a primary screening system and a secondary screening system; the primary screening system performs the first separation, separating large solid rocks and mud lumps; the secondary screening system performs the second separation, separating mud and water. Figure 1 As shown, the slurry containing soil enters the No. 2 slurry storage tank from the No. 1 slurry storage tank 1, and is then pumped into the No. 1 hydrocyclone 4 by the No. 1 pump 3. The overflow fine-particle slurry from the No. 1 hydrocyclone 4 returns to the No. 2 slurry storage tank 2 for recirculation or enters the No. 3 slurry storage tank 5, and is then pumped into the No. 2 hydrocyclone 6 by the No. 2 pump 8. The overflow fine-particle slurry from the No. 2 hydrocyclone 6 returns to the No. 3 slurry storage tank 5 for recirculation or enters the storage tank 7.

[0004] Since the No. 1 slurry storage tank 1, the No. 2 slurry storage tank 2, and the No. 3 slurry storage tank 5 are interconnected, some uncirculated material will flow from the No. 1 slurry storage tank 1 through the No. 2 slurry storage tank 2 and directly into the No. 3 slurry storage tank 5 or the liquid storage tank 7, resulting in poor separation effect. Consequently, sedimentation and sludge accumulation are likely to occur at the bottom of the liquid storage tank 7, requiring cleaning by staff and reducing the efficiency of their work. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a mud-water separation component and a tunnel boring machine to solve the problem of poor separation effect of existing mud-water separation components.

[0006] To achieve the above-mentioned technical objectives, the first aspect of this application provides a mud-water separation component, comprising: a first circulation component;

[0007] The first circulation component includes: a first slurry storage tank and a first hydrocyclone;

[0008] The first slurry storage tank is provided with two interconnected zones: Zone 1 and Zone 2.

[0009] A first filter screen is provided between the first zone and the second zone;

[0010] The first zone is connected to the liquid inlet end of the first hydrocyclone;

[0011] The second zone is connected to the overflow port of the first cyclone separator.

[0012] Furthermore, a first backflushing pipe is provided inside the first slurry storage tank;

[0013] The first backflush pipe is used to flush liquid into the first slurry storage tank.

[0014] Furthermore, the first zone is connected to the inlet end of the first hydrocyclone via the first pump body;

[0015] The first pump body is connected to the first backflush pipe.

[0016] Furthermore, the first backflush tube includes a connected bottom section and a side section;

[0017] The bottom section is located at the bottom of the first slurry storage tank;

[0018] The side section is disposed on the side of the first slurry storage tank;

[0019] The outlet of the bottom section faces the bottom of the first slurry storage tank;

[0020] The outlet of the side section faces the first filter screen.

[0021] Furthermore, it also includes: primary components;

[0022] The primary component includes: a slurry inlet tank;

[0023] The slurry inlet trough is connected to the first zone;

[0024] A second backflushing pipe is installed inside the slurry inlet tank;

[0025] The first pump body is connected to the second backflush pipe.

[0026] Furthermore, it also includes: a second circulation assembly and a storage tank;

[0027] The second circulation component includes: a second slurry storage tank and a second hydrocyclone;

[0028] The second slurry storage tank is equipped with three interconnected zones and four interconnected zones;

[0029] A second filter screen is provided between the third zone and the fourth zone;

[0030] The three zones are connected to the liquid inlet end of the second hydrocyclone;

[0031] The fourth zone is connected to the overflow port of the second hydrocyclone;

[0032] The second and third zones are interconnected;

[0033] The four zones are connected to the liquid storage tank.

[0034] Furthermore, a third backflushing pipe is installed inside the second slurry storage tank;

[0035] The third backflushing pipe is used to flush liquid into the second slurry storage tank.

[0036] Furthermore, the three zones are connected to the inlet end of the second hydrocyclone via the second pump body;

[0037] The second pump body is connected to the third backflush pipe.

[0038] Furthermore, the third backflush tube includes a bottom section and a side section connected together;

[0039] The bottom section is located at the bottom of the second slurry storage tank;

[0040] The side section is disposed on the side of the second slurry storage tank;

[0041] The outlet of the bottom section faces the bottom of the second slurry storage tank;

[0042] The outlet of the side section faces the second filter screen.

[0043] A second aspect of this application provides a tunnel boring machine including the mud-water separation component described in any of the preceding claims.

[0044] As can be seen from the above technical solutions, this application provides a mud-water separation component and a tunnel boring machine; wherein, the mud-water separation component includes: a first circulation component; the first circulation component includes: a first slurry storage tank and a first hydrocyclone; the first slurry storage tank is provided with a first zone and a second zone that are interconnected; a first filter screen is provided between the first zone and the second zone; the first zone is connected to the liquid inlet end of the first hydrocyclone; the second zone is connected to the overflow port of the first hydrocyclone.

[0045] In this scheme, a first zone and a second zone are set in the first slurry storage tank. The first zone connects to the components of the previous process, and the second zone connects to the components of the next process. Thus, the slurry after being diverted by the first hydrocyclone and the slurry before diversion can be separated through the first zone and the first filter screen can effectively prevent the slurry in the first zone from flowing into the components of the next process, thereby improving the mud-water separation effect and reducing the occurrence of mud and sand deposition in the components of the next process. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 A wireframe schematic diagram of a conventional mud-water separation assembly provided for an embodiment of this application;

[0048] Figure 2 A wireframe schematic diagram of a mud-water separation component provided in an embodiment of this application;

[0049] Figure 3 for Figure 2 Cross-sectional view at point AA;

[0050] In the picture:

[0051] 1. No. 1 slurry storage tank; 2. No. 2 slurry storage tank; 3. No. 1 pump; 4. No. 1 hydrocyclone; 5. No. 3 slurry storage tank; 6. No. 2 hydrocyclone; 7. Storage tank; 8. No. 2 pump;

[0052] 10. Slurry inlet tank; 11. Second backflushing pipe; 20. First slurry storage tank; 21. First backflushing pipe; 22. First pump body; 23. First flushing pipe; 24. First filter screen; 201. Zone 1; 202. Zone 2; 30. Second slurry storage tank; 31. Third backflushing pipe; 32. Second pump body; 33. Second flushing pipe; 34. Second filter screen; 301. Zone 3; 302. Zone 4; 40. Liquid storage tank; 50. First hydrocyclone; 51. Primary dewatering vibrating screen; 60. Second hydrocyclone; 61. Secondary dewatering vibrating screen; 201. Pressure reducing tank; 202. Pre-screening; 91. First slag yard; 92. Second slag yard; 93. Third slag yard. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments in this application specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0054] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0056] Please see Figure 1 In the first aspect of this application, a mud-water separation component is provided, including: a first circulation component; the first circulation component includes: a first slurry storage tank 20 and a first hydrocyclone 50; the first slurry storage tank 20 is provided with a first zone 201 and a second zone 202 that are interconnected; a first filter screen 24 is provided between the first zone 201 and the second zone 202; the first zone 201 is connected to the liquid inlet end of the first hydrocyclone 50; the second zone 202 is connected to the overflow port of the first hydrocyclone 50.

[0057] The mud-water separation component provided in this embodiment can be used as a device for a single cycle, or as a device for a second or multiple cycles.

[0058] Taking a single-cycle device as an example, the slurry to be separated enters zone 201, passes through the first hydrocyclone 50, and enters zone 202. Then, part of it enters the component for the next process from zone 202, and part passes through the first filter screen 24 for recirculation. In this process, the first filter screen 24 can effectively block the slurry that has not passed through the first hydrocyclone 50 from entering zone 202, thereby effectively distinguishing the coarseness of the particles in the slurry and reducing the sedimentation of mud and sand in the component for the next process.

[0059] Taking a secondary or secondary circulation as an example, the first circulation component can include multiple components, and these multiple first circulation components are connected in parallel. Thus, after the mud enters different first circulation components in sequence, it will be circulated and diverted by the hydrocyclone respectively.

[0060] In a further improved embodiment, a first backflushing pipe 21 is provided inside the first slurry storage tank 20; the first backflushing pipe 21 is used to flush liquid into the first slurry storage tank 20.

[0061] The first backflushing pipe 21 can be connected to a water pump outside the first slurry storage tank 20. After the water pump is started, the first backflushing pipe 21 can flush liquid into the first slurry storage tank 20, thereby flushing up the mud and sand accumulated in the first slurry storage tank 20, so that the settled mud in the first slurry storage tank 20 can enter the circulation, thus improving the mud-water separation effect.

[0062] In a more specific embodiment, zone 201 is connected to the inlet end of the first hydrocyclone 50 via the first pump body 22; the first pump body 22 is connected to the first backflush pipe 21.

[0063] In this embodiment, the first pump body 22 is used to draw slurry from zone 201 into the first hydrocyclone 50, and can also draw slurry from zone 201 into the first backflushing pipe 21, thus providing a driving force for circulation to the first backflushing pipe 21. Therefore, in this embodiment, the first backflushing pipe 21 does not need to be connected to a water pump or other components to impact the settled sludge in the first slurry storage tank 20, thereby simplifying the component structure.

[0064] In one embodiment, the first backflushing pipe 21 includes a bottom section and a side section connected together; the bottom section is disposed at the bottom of the first slurry storage tank 20; the side section is disposed at the side of the first slurry storage tank 20; the outlet of the bottom section faces the bottom of the first slurry storage tank 20; and the outlet of the side section faces the first filter screen 24.

[0065] Please see Figure 2 In this embodiment, the first backflushing pipe 21 is an L-shaped pipe and is attached to the bottom and side of the first slurry storage tank 20. The first backflushing pipe 21 can flush up the mud and sand at the bottom of the first slurry storage tank 20, and can also flush up the accumulated mud on the first filter screen 24.

[0066] In a more specific embodiment, it further includes: a primary component; the primary component includes: a slurry inlet 10; the slurry inlet 10 is connected to a zone 201; a second backflushing pipe 11 is provided in the slurry inlet 10; and a first pump body 22 is connected to the second backflushing pipe 11.

[0067] The grout inlet 10 is used to supply mortar with separation to zone 201; and in this embodiment, the second backflushing pipe 11 can flush up the accumulated mud at the bottom of the grout inlet 10 to avoid the accumulation of mud and sand.

[0068] Furthermore, it also includes: a second circulation assembly and a storage tank 40; the second circulation assembly includes: a second slurry tank 30 and a second hydrocyclone 60; the second slurry tank 30 is provided with interconnected three zones 301 and four zones 302; a second filter screen 34 is provided between the three zones 301 and four zones 302; the three zones 301 are connected to the inlet end of the second hydrocyclone 60; the four zones 302 are connected to the overflow port of the second hydrocyclone 60; the two zones 202 and the three zones 301 are interconnected; the four zones 302 are connected to the storage tank 40.

[0069] Furthermore, a third backflushing pipe 31 is provided inside the second slurry storage tank 30; the third backflushing pipe 31 is used to flush liquid into the second slurry storage tank 30.

[0070] Zone 301 is connected to the inlet end of the second hydrocyclone 60 via the second pump body 32. Similarly, the third backflush pipe 31 can be driven by the second pump body 32. That is, the second pump body 32 is connected to the third backflush pipe 31.

[0071] In this embodiment, the third backflushing pipe 31 can also be an L-shaped pipe. Specifically, the third backflushing pipe 31 includes a bottom section and a side section connected together; the bottom section is disposed at the bottom of the second slurry storage tank 30; the side section is disposed at the side of the second slurry storage tank 30; the outlet of the bottom section faces the bottom of the second slurry storage tank 30; and the outlet of the side section faces the second filter screen 34.

[0072] A second aspect of this application provides a tunnel boring machine including the mud-water separation component of any of the above.

[0073] Taking the mud-water separation component, which includes the aforementioned primary component, first circulation component, and second circulation component, as an example.

[0074] The primary component also includes a pre-screening 202. The first circulation component also includes a primary dewatering vibrating screen 51; the second circulation component also includes a secondary dewatering vibrating screen 61.

[0075] The slurry from the tunnel boring machine is pumped into a pressure reducing tank 201 after passing through a primary screen. After being depressurized in the pressure reducing tank 201, it falls onto a pre-screening screen 202. The material on the screen, with a particle size greater than 4mm, enters the first slag yard 91 for storage. Material with a particle size less than 4mm passes through the screen into the slurry inlet trough 10 and the first slurry storage tank 20 connected to it. The dewatered slag in the first slag yard 91 has a moisture content ≤30% and a particle size ≥4mm.

[0076] A first filter screen 24 is provided on the right side of the first slurry storage tank 20; the first filter screen 24 divides the first slurry storage tank 20 into a first zone 201 and a second zone 202; the first filter screen 24 can pass through finer particulate materials; larger particulate materials are isolated in the first zone 201.

[0077] A first pump body 22 is connected to the lower side of Zone 201. The slurry screened out by the pre-screening 202 or the slurry from the first storage tank 20 is pumped by the first pump body 22 to the inlet of two or more first hydrocyclones 50. Under the hydrocyclone separation action of the first hydrocyclones 50, larger particles flow out at the bottom of the hydrocyclone and enter the first-stage dewatering vibrating screen 51, while finer particles flow out at the overflow port of the hydrocyclone and return to Zone 202 of the first storage tank 20 for recirculation.

[0078] The material passing through the primary dewatering vibrating screen 51 with a particle size of 2-4mm enters the second slag yard 92 for stockpiling; the material with a particle size smaller than 2mm passes through the primary dewatering vibrating screen 51 and enters the first slurry storage tank 20 for recycling. Among them, the moisture content of the slag after dewatering in the second slag yard 92 is ≤30%, and the particle size is ≥2mm.

[0079] The first pump body 22 is connected to the first backflush pipe 21 and the second backflush pipe 11 through the first flushing pipe 23; the slurry is sprayed from the first backflush pipe 21 and the second backflush pipe 11 by controlling the pneumatic valve switch on the branch of the first flushing pipe 23. The outlets of the first backflush pipe 21 and the second backflush pipe 11 are equipped with backflush pipe nozzles 26; the slurry sprayed from the nozzles 26 forms a fan shape, and the kinetic energy of the backflushed slurry is sufficient to flush up the sludge settled at the bottom or attached to the first filter screen 24, thus preventing the first filter screen 24 from becoming clogged.

[0080] A second filter screen 34 is provided on the right side of the second slurry storage tank 30; the second filter screen 34 divides the second slurry storage tank 30 into three zones 301 and four zones 302; the second filter screen 34 filters finer mud particles and isolates coarser particles in the three zones 301.

[0081] A second pump body 32 is connected to the lower side of the third zone 301. The second pump body 32 pumps the slurry screened by the secondary dewatering vibrating screen 61 or the slurry from the first slurry storage tank 20 to the inlet of three or more secondary hydrocyclones 60. Under the hydrocyclone separation action of the secondary hydrocyclones 60, the finer particles flow out at the bottom of the hydrocyclone and enter the secondary dewatering vibrating screen 61. The finer particles flow out at the overflow port of the hydrocyclone and return to the fourth zone 302 of the second slurry storage tank 30 for recirculation.

[0082] The material passing through the secondary dewatering vibrating screen 61 is 0.074–2 mm and is then stockpiled in the third slag yard 93. The dewatered slag in the third slag yard 93 has a moisture content ≤30% and a particle size ≥0.074 mm.

[0083] Finer particles from the secondary dewatering vibrating screen 61 enter the second slurry storage tank 30 for recirculation. The second pump body 32 is connected to the third backflushing pipe 31 through the second flushing pipe 33. The slurry is sprayed from the third backflushing pipe 31 by controlling the pneumatic valve on the second flushing pipe 33. A nozzle 26 is installed at the outlet of the third backflushing pipe 31. The slurry sprayed from the nozzle 26 forms a fan shape, and the kinetic energy of the backflushing slurry is sufficient to flush up the sludge settled at the bottom or attached to the second filter screen 34, preventing the second filter screen from clogging. Under the action of the second filter screen, there are no large particles in the fourth zone 302, ensuring the mud-water separation effect when entering the storage tank 40. The separated slurry is temporarily stored, stirred and adjusted in the storage tank 40 before being transported to the tunnel boring machine for operation.

[0084] The above are merely preferred embodiments of this application and are not intended to limit the present invention. Although the present application has been described in detail with reference to examples, those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A slurry separation assembly characterized by, The mud-water separation assembly comprises: a first circulating component; the first circulating component comprises a first slurry storage tank (20) and a first cyclone (50); a first zone (201) and a second zone (202) are arranged in the first slurry storage tank (20) and are in communication with each other; a first filter screen (24) is arranged between the first zone (201) and the second zone (202); the first zone (201) is connected to a liquid inlet end of the first cyclone (50); the second zone (202) is connected to an overflow port of the first cyclone (50).

2. The slurry separation assembly of claim 1, wherein, a first backflush pipe (21) is arranged in the first slurry storage tank (20); the first backflush pipe (21) is used to flush liquid into the first slurry storage tank (20).

3. The slurry separation assembly of claim 2, wherein, the first zone (201) is connected to the liquid inlet end of the first cyclone (50) through a first pump body (22); the first pump body (22) is connected to the first backflush pipe (21).

4. A slurry separation assembly according to claim 2 or 3, wherein, the first backflush pipe (21) comprises a bottom section and a side section; the bottom section is arranged at a bottom of the first slurry storage tank (20); the side section is arranged at a side of the first slurry storage tank (20); a water outlet of the bottom section faces the bottom of the first slurry storage tank (20); a water outlet of the side section faces the first filter screen (24).

5. The slurry separation assembly of claim 3, wherein, The mud-water separation assembly further comprises: a primary component; the primary component comprises a slurry inlet tank (10); the slurry inlet tank (10) is connected to the first zone (201); a second backflush pipe (11) is arranged in the slurry inlet tank (10); the first pump body (22) is connected to the second backflush pipe (11).

6. The slurry separation assembly of claim 1 or 5, wherein, The mud-water separation assembly further comprises: a second circulating component and a liquid storage tank (40); the second circulating component comprises a second slurry storage tank (30) and a second cyclone (60); a third zone (301) and a fourth zone (302) are arranged in the second slurry storage tank (30) and are in communication with each other; a second filter screen (34) is arranged between the third zone (301) and the fourth zone (302); the third zone (301) is connected to a liquid inlet end of the second cyclone (60); the fourth zone (302) is connected to an overflow port of the second cyclone (60); the second zone (202) and the third zone (301) are in communication with each other; the fourth zone (302) is connected to the liquid storage tank (40).

7. The slurry separation assembly of claim 6, wherein, a third backflush pipe (31) is arranged in the second slurry storage tank (30); the third backflush pipe (31) is used to flush liquid into the second slurry storage tank (30).

8. The slurry separation assembly of claim 7, wherein, the third zone (301) is connected to the liquid inlet end of the second cyclone (60) through a second pump body (32); the second pump body (32) is connected to the third backflush pipe (31).

9. The slurry separation assembly of claim 7, wherein, the third backflush pipe (31) comprises a bottom section and a side section; the bottom section is arranged at a bottom of the second slurry storage tank (30); the side section is arranged at a side of the second slurry storage tank (30); a water outlet of the bottom section faces the bottom of the second slurry storage tank (30); a water outlet of the side section faces the second filter screen (34).

10. A tunneling machine characterized by, The mud-water separation assembly comprises any one of claims 1 to 9.

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