CN107362610B

CN107362610B - Shield constructs quick-witted mud residue filtering system

Info

Publication number: CN107362610B
Application number: CN201710676331.0A
Authority: CN
Inventors: 刘林周; 袁志富; 刘继伟; 李宏斌; 韩璐
Original assignee: China Railway Sixth Group Co Ltd; Traffic Engineering Branch of China Railway Sixth Group Co Ltd
Current assignee: China Railway Sixth Group Co Ltd; Traffic Engineering Branch of China Railway Sixth Group Co Ltd
Priority date: 2017-08-09
Filing date: 2017-08-09
Publication date: 2020-07-28
Anticipated expiration: 2037-08-09
Also published as: CN107362610A

Abstract

The invention provides a slurry residue filtering system of a shield tunneling machine, and belongs to the technical field of shield construction equipment. The slag washing device is provided with a slag purifying outlet, a slurry outlet and a slag washing liquid inlet, and the slurry outlet is connected with the slag inlet of the slag filtering device. The invention realizes the filtration of the slurry, can save resources, saves the expenses of the treatment, transportation and the like of the slurry and reduces the cost; the mud content in the stone sediment of discharge has further been reduced to the washing sediment device simultaneously, and the reutilization of the stone sediment of being convenient for also can keep the cleanness of construction and transportation place, reduces the discarded object total amount, but also makes the mud of the overwhelming majority can be utilized once more, has saved a large amount of resources.

Description

Shield constructs quick-witted mud residue filtering system

Technical Field

The invention belongs to the technical field of shield construction equipment, and particularly relates to a slurry residue filtering system of a shield machine.

Background

At present, the shield tunneling machine has the characteristics of high automation degree, labor saving, high construction speed, one-step tunneling, no influence of weather, controllable ground settlement during excavation, reduction of influence on ground buildings, no influence on ground traffic during underwater excavation and the like, and is more economical and reasonable in construction by the shield tunneling machine under the conditions of longer tunnel line and larger buried depth. The basic working principle of the shield tunneling machine is that a cylindrical steel component is pushed forwards along the axis of the tunnel to excavate soil. The casing of the cylinder assembly, the shield, acts as a temporary support for the excavated, not yet lined tunnel section, bearing the pressure of the surrounding soil layers and sometimes also the groundwater pressure and the water that is trapped outside. The operations of digging, dumping, lining and the like are carried out under the shield of the shield. In order to ensure the stress balance of the shield machine, the earth pressure is generally balanced by adopting air balance, muddy water balance and other modes. The existing method is to replace the slurry regularly, but because the construction in the city has no place for discharging the slurry and high transportation cost, and the additive in the slurry has high price, the abandoned treatment of the used slurry is uneconomical and not environment-friendly.

Disclosure of Invention

The invention aims to provide a shield machine mud residue filtering system to solve the technical problems of resource waste and cost increase caused by the fact that mud in a shield machine cannot be recycled in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a shield constructs quick-witted mud filter residue system, advances pipe, coarse filter equipment, filter residue device and washing sediment device including the sediment thick liquid, the filter residue device includes the sediment thick liquid import, arranges the cinder notch and the export of pure thick liquid, the sediment thick liquid advance the pipe with coarse filter equipment connects, coarse filter equipment with the sediment thick liquid import of filter residue device passes through the tube coupling, the row's cinder notch of filter residue device with washing sediment device connects, washing sediment device is equipped with the import of pure sediment export, thin thick liquid export and washing slag liquid, the thin liquid export with the sediment thick liquid access connection of coarse filter equipment or filter residue device.

Further, in the mud residue filtering system of the shield tunneling machine, the residue washing device is provided with a slurry filter screen for filtering slurry, and the slurry outlet is provided with a slurry pump for sucking out slurry from the residue washing device.

Further, among the aforesaid shield structure machine mud filter residue system, wash the sediment device for washing the sediment pond, the row's cinder notch of filter residue device is located wash the upper portion in sediment pond, the thin slurry filter screen is established wash sediment pond middle part, the thin slurry export is located wash sediment bottom of the pool portion, the net sediment export is located wash sediment pond top or the wash sediment pond lateral wall on thin slurry filter screen upper portion, still be equipped with in the washing sediment device and be used for supplementary emission net sediment and with the slag scraping equipment that the net sediment export corresponds.

Further, among the aforementioned shield constructs quick-witted mud filter residue system, the rough filtering device middle part is equipped with the rough filtration filter screen, the sediment thick liquid advances union coupling and is in rough filtering device's upper portion, the sediment thick liquid access connection of filter residue device is in rough filtering device's lower part.

Further, among the aforementioned shield constructs quick-witted mud residue filtration system, still include be used for with the sediment grain in the net thick liquid that filters out among the residue filtration device is further smashed, the reducing mechanism of rounding, the reducing mechanism with the net thick liquid exit linkage of residue filtration device.

Further, in the shield tunneling machine mud residue filtering system, the shield tunneling machine mud residue filtering device further comprises a specific gravity adjusting device for adjusting the specific gravity of the net slurry filtered out from the residue filtering device, and the specific gravity adjusting device is connected with a net slurry outlet of the residue filtering device.

Further, among the aforementioned shield constructs quick-witted mud filter residue system, including at least two the filter residue device, the filter residue device is piston filter residue device, the sediment thick liquid import of filter residue device respectively with rough filtering device connects, the row's cinder notch of filter residue device respectively with wash the sediment device and connect.

The beneficial effects of the mud residue filtering system of the shield tunneling machine provided by the invention are as follows: compared with the prior art, the invention realizes the filtration of the slurry, can save resources, saves the expenses generated in the processes of harmless treatment, transportation and the like of the slurry, and reduces the cost; meanwhile, the slag washing device is arranged, so that the content of the slurry in the discharged stone slag is further reduced, the secondary utilization of the stone slag is facilitated, the cleanness of construction and transportation places can be kept, the total amount of waste is reduced, most of slurry can be reused, and a large amount of resources are saved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a slurry residue filtering system of a shield tunneling machine according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a residue filtering device of a shield tunneling machine mud residue filtering system according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

1, feeding slag slurry into a pipe; 2 a coarse filtration device; 3 a residue filtering device; 31 cylinder body; 32 pistons; 33, a pulp cleaning port; 331 a first one-way valve; 34 a pumping outlet; 35, a filter screen; 36 slag gathering cavity; 37, feeding the slurry into a pipe; 371 a second one-way valve; 38 a slag discharge pipe; a 39 position valve; 4, a slag washing device; 41 a clean slag outlet; 42 a slurry outlet; 43 a slag washing liquid inlet; 44 a slurry screen; 5, a slurry pump; 6, a crushing device; 7 specific gravity adjusting device.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1, a mud residue filtering system of a shield tunneling machine according to the present invention will now be described. Shield constructs quick-witted mud filter residue system, advance pipe 1, rough filter device 2, filter residue device 3 and wash sediment device 4 including the sediment thick liquid, filter residue device 3 includes the sediment thick liquid import, arranges the cinder notch and the export of pure thick liquid, the sediment thick liquid advance pipe 1 with rough filter device 2 is connected, rough filter device 2 with the pipeline connection is passed through in the sediment thick liquid import of filter residue device 3, the row cinder notch of filter residue device 3 with wash sediment device 4 is connected, wash sediment device 4 and be equipped with pure sediment export 41, thin thick liquid export 42 and wash slag liquid import 43, thin liquid export 42 with rough filter device 2 or filter residue device 3's sediment thick liquid access connection. The coarse filtering device 2 is used for blocking a pipeline or the residue filtering device 3 by sludge impurities with overlarge particle sizes, the residue filtering device 3 is used for filtering out stone slag, and the slag washing device 4 is used for washing the filtered stone slag.

When the device is used, slurry (namely slurry with stone slag) enters from the slurry inlet pipe 1, impurities of the sludge with large particle size are filtered out through the coarse filtering device 2, clean slurry (namely slurry without large stone slag) and stone slag are filtered out after entering the filter residue device 3, the clean slurry is discharged from a clean slurry outlet of the filter residue device 3, the stone slag enters the slag washing device 4 after being discharged from a slag discharge port of the filter residue device 3, the stone slag is washed by the slag washing device 4, slurry containing the sludge particles (namely slurry diluted by the washing liquid) is sent into the coarse filtering device 2 or the filter residue device 3 to be continuously filtered, and the cleaned clean slag (namely the stone slag containing less sludge particles) is discharged from a clean slag outlet 41.

Compared with the prior art, the shield machine mud residue filtering system provided by the invention has the advantages that the mud is filtered, the resources can be saved, the expenses generated in the processes of harmless treatment, transportation and the like of the mud are saved, and the cost is reduced; meanwhile, the slag washing device 4 is arranged, so that the content of slurry in the discharged stone slag is further reduced, the secondary utilization of the stone slag is facilitated, the cleanness of construction and transportation places can be kept, the total amount of waste is reduced, most of slurry can be reused, and a large amount of resources are saved.

Further, referring to fig. 1, as an embodiment of the slurry residue filtering system of the shield tunneling machine provided by the present invention, the residue washing device 4 is provided with a slurry filter 44 for filtering the slurry, and the slurry outlet 42 is provided with a slurry pump 5 for sucking the slurry out of the residue washing device 4.

Further, referring to fig. 1, as a specific embodiment of the shield tunneling machine mud residue filtering system provided by the present invention, the residue washing device 4 is a residue washing tank, the residue discharge port of the residue filtering device 3 is located at the upper portion of the residue washing tank, the slurry filter screen 44 is arranged in the middle of the residue washing tank, the slurry outlet 42 is located at the bottom of the residue washing tank, the residue cleaning outlet 41 is located at the top of the residue washing tank or on the sidewall of the residue washing tank above the slurry filter screen 44, and a residue scraping device for assisting in discharging the residue cleaning and corresponding to the residue cleaning outlet 41 is further arranged in the residue washing device 4. The slag washing tank is simple in structure, convenient to maintain, convenient to adopt automatic control and management, safe and convenient, and slag washing is completed basically by means of gravity in the using process.

Further, referring to fig. 1, as a specific embodiment of the shield tunneling machine slurry residue filtering system provided by the present invention, a coarse filtering screen 21 is disposed in the middle of the coarse filtering device 2, the slurry inlet pipe 1 is connected to the upper portion of the coarse filtering device 2, and a slurry inlet of the residue filtering device 3 is connected to the lower portion of the coarse filtering device 2. The structure completes coarse filtration by means of gravity in the working process, and is safe and convenient to use. The coarse filter screen 21 can be obliquely arranged so that sludge impurities with overlarge particle sizes directly fall to one side, and cleaning and collection are facilitated.

Further, referring to fig. 1, as a specific embodiment of the shield tunneling machine slurry residue filtering system provided by the present invention, the shield tunneling machine slurry residue filtering system further includes a crushing device 6 for further crushing and rounding the residue particles in the purified slurry filtered out from the residue filtering device 3, and the crushing device 6 is connected to the purified slurry outlet of the residue filtering device 3. Because the residue filtering device 3 can not filter out the smaller-particle stone slag often, in order to prevent the stone slag from wearing the pipeline, the crushing device 6 is arranged, the smaller-particle stone slag actually becomes a part of solid substances in the slurry after passing through the crushing device 6, the content of the solid substances is increased, and the influence of the slag washing liquid mixed in the slag washing device 4 on the specific weight of the slurry is balanced. The slag particles refer to solid matters such as stone slag and the like except non-slurry particles.

Further, referring to fig. 1, as a specific embodiment of the shield tunneling machine mud residue filtering system provided by the present invention, the shield tunneling machine mud residue filtering system further includes a specific gravity adjusting device 7 for adjusting a specific gravity of the net slurry filtered out from the residue filtering device 3, and the specific gravity adjusting device 7 is connected to a net slurry outlet of the residue filtering device 3. The specific gravity adjusting device 7 is used for accurately adjusting the specific gravity of the net slurry filtered out in the residue filtering device 3, and when the crushing device 6 is provided, the specific gravity adjusting device 7 is positioned behind the crushing device 6. The proportion adjusting device 7 can include the detection device that real-time detection mud proportion, thick liquid advances the pipe and the pipe is advanced to the thin thick liquid, mixes appropriate amount of thick liquid or thin liquid in order to balance the mud proportion behind the detection device detection mud proportion, because the slag washing liquid that mixes in the slag washing device 4 can be more in general, so the mud proportion of flowing through the proportion adjusting device 7 is on the low side, can not set up the thin liquid at this moment and advance the pipe but only set up thick liquid.

Further, referring to fig. 1, as a specific embodiment of the shield tunneling machine slurry residue filtering system provided by the present invention, the shield tunneling machine slurry residue filtering system includes at least two residue filtering devices 3, each residue filtering device 3 is a piston type residue filtering device 3, slurry inlets of the residue filtering devices 3 are respectively connected to the coarse filtering device 2, and residue outlets of the residue filtering devices 3 are respectively connected to the residue washing device 4. Therefore, one set of equipment only uses at least two filter residue devices 3, and other equipment only is provided with one set, so that the power utilization rate of the filter residue devices 3 and the continuous operation of other equipment are improved in practical use.

Further, referring to fig. 2, as a specific embodiment of the shield tunneling machine mud residue filtering system provided by the present invention, the residue filtering device 3 includes a cylinder 31 and a piston 32, a mud cleaning port 33 communicated with the inside of the cylinder 31 is disposed on a side wall of the cylinder 31, and a first check valve 331 is disposed on the mud cleaning port 33; the cylinder body 31 is further provided with a pumping and discharging port 34, the pumping and discharging port 34 is externally connected with a slag gathering cavity 36, a filter screen 35 is arranged between the pumping and discharging port 34 and the slag gathering cavity 36, the slag gathering cavity 36 is provided with a slag slurry inlet pipe 37 and a slag discharging pipe 38, the slag slurry inlet pipe 37 is provided with a second one-way valve 371, and the slag discharging pipe 38 is provided with a position valve 39 which is opened and closed according to the position of the piston 2; the distance from the pumping and discharging port 34 to the end part of the cylinder body 31 is less than the distance from the clean pulp port 33 to the end part of the cylinder body 31.

When the device is used, the piston 32 moves backwards, negative pressure is formed in the cylinder body 31, the first one-way valve 331 and the position valve 39 are closed at the moment, slag slurry (namely slurry with ballast) enters from the slag slurry inlet pipe 37, the second one-way valve 371 is opened at the moment, the slag slurry flows into the slag gathering cavity 36, clean slurry (namely slurry without large-particle ballast) in the slag slurry enters the cylinder body 31 through the filter screen 35 on the pumping and discharging port 34, and the large-particle ballast is blocked in the slag gathering cavity 36; then the piston 32 moves forward, positive pressure is formed in the cylinder 31, at the moment, the first one-way valve 331 is opened, the second one-way valve 371 is closed, the clean slurry is sent out from the clean slurry port 33, after the piston 32 moves forward and blocks the clean slurry port 33, a certain amount of clean slurry still exists in the cylinder 31, at the moment, the position valve 39 is opened, the clean slurry returns to the slag gathering cavity 36 through the pumping and discharging port 34 and the filter screen 35 and pushes large-particle stone slag to enter the slag discharging pipe 38 for discharging; the piston 32 then moves back into the next cycle. According to the residue filtering device provided by the invention, the clear slurry is filtered from the residue slurry through the reciprocating piston motion, and the filter screen 35 is washed through a part of the clear slurry retained in the cylinder body 31, because the pressure in the cylinder body 31 is increased when the piston 32 blocks the clear slurry opening 33, and the position valve 39 is opened instantly, the flow velocity of the clear slurry at the pumping and discharging opening 34 is increased, a strong washing effect is formed on the filter screen 35, the stone residue clamped on the filter screen 35 can be washed out, and the filter screen is prevented from being blocked; the whole process is carried out in one piston cycle, the working process is smooth, the filtering efficiency is greatly improved, meanwhile, the filter screen is effectively prevented from being blocked, and the maintenance cost is greatly reduced.

Further, referring to fig. 2, as a specific embodiment of the slurry residue filtering system of the shield tunneling machine provided by the present invention, the shield tunneling machine further includes a position sensor and a controller, the position sensor is used for detecting the position of the piston 32, the output end of the position sensor is electrically connected to the input end of the controller, the position valve 39 is an electrically controlled valve, and the input end of the controller is electrically connected to the input end of the position valve 39. The position valve 39 is controlled in an electric control mode, so that the whole device is more stable in work, simpler in structure and higher in applicability. The position sensor may be provided on the piston 32, the cylinder 31, or the purge port 33. The position sensor may be a pressure sensor for determining the position of the piston 2 from a change in pressure, a displacement gauge for determining the position of the piston 32 from a distance traveled, or any other sensor for directly detecting the position.

Further, referring to fig. 2, as a specific embodiment of the slurry residue filtering system of the shield tunneling machine provided by the present invention, a filter screen groove is arranged between the pumping and discharging port 34 and the slag gathering cavity 36, and the filter screen 35 is fixed in the filter screen groove. Set up the filter screen groove and can make filter screen 35 connect more firm, prevent that filter screen 35 pine from taking off, also can be convenient for simultaneously filter screen 35's dismantlement change. The filter screen 35 is preferably connected with the filter screen groove in a clamped mode, the clamping mode is convenient to detach and replace, the replacement efficiency is favorably improved, and the equipment shutdown time is shortened.

Further, referring to fig. 2, as a specific embodiment of the slurry residue filtering system of the shield tunneling machine provided by the present invention, the pumping and discharging port 34 is located at one end of the cylinder 31, and the residue discharging pipe 38 is arranged parallel to the main axis direction of the cylinder 31. The structure is convenient for the stone slag to be sent into the slag discharge pipe 38 along a straight line, and can prevent the stone slag from gathering to block the slag discharge pipe 38.

Further, referring to fig. 2, as a specific embodiment of the slurry residue filtering system of the shield tunneling machine provided by the present invention, the two ends of the cylinder 31 are both provided with the slurry cleaning port 33 and the pumping and discharging port 34, and the piston 32 is a bidirectional plunger. I.e. the whole device resembles a double chamber plunger pump, the piston 32 divides the cylinder 31 into two chambers. The structure is equivalent to that one set of power equipment drives two filter screen self-cleaning residue filtering devices, power is saved, and efficiency is improved.

Further, referring to fig. 2, as a specific embodiment of the slurry residue filtering system of the shield tunneling machine provided by the present invention, the length of the piston 32 is greater than the diameter of the clean slurry port 33, so as to prevent the piston 32 from crossing the clean slurry port 33 and then returning slurry to the clean slurry port 33.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a shield constructs quick-witted mud residue filtering system which characterized in that: the slag washing device comprises a slag pulp inlet pipe (1), a coarse filtering device (2), a slag filtering device (3) and a slag washing device (4), wherein the slag filtering device (3) comprises a slag pulp inlet, a slag discharge port and a clean pulp outlet, the slag pulp inlet pipe (1) is connected with the coarse filtering device (2), the coarse filtering device (2) is connected with the slag pulp inlet of the slag filtering device (3) through a pipeline, the slag discharge port of the slag filtering device (3) is connected with the slag washing device (4), the slag washing device (4) is provided with a clean slag outlet (41), a thin pulp outlet (42) and a slag washing liquid inlet (43), and the thin pulp outlet (42) is connected with the slag pulp inlet of the coarse filtering device (2) or the slag washing device (3);

the residue filtering device (3) comprises a cylinder body (31) and a piston (32), a pulp purifying opening (33) communicated with the inside of the cylinder body (31) is formed in the side wall of the cylinder body (31), and a first one-way valve (331) is arranged on the pulp purifying opening (33); the slag extractor is characterized in that a pumping and discharging port (34) is further formed in the cylinder body (31), a slag gathering cavity (36) is connected to the outside of the pumping and discharging port (34), a filter screen (35) is arranged between the pumping and discharging port (34) and the slag gathering cavity (36), a slag slurry inlet pipe (37) and a slag discharging pipe (38) are arranged on the slag gathering cavity (36), a second one-way valve (371) is arranged on the slag slurry inlet pipe (37), and a position valve (39) which is opened and closed according to the position of the piston (32) is arranged on the slag discharging pipe (38); the distance between the pumping and discharging port (34) and the lower end part of the cylinder body (31) is smaller than the distance between the clean pulp port (33) and the lower end part of the cylinder body (31).

2. The shield tunneling machine mud residue filtering system of claim 1, wherein: the slag washing device (4) is provided with a slurry filter screen (44) for filtering slurry, and the slurry outlet (42) is provided with a slurry pump (5) for sucking out slurry in the slag washing device (4).

3. The shield tunneling machine mud residue filtering system of claim 2, wherein: wash sediment device (4) for washing the sediment pond, the row's cinder notch of filter residue device (3) is located wash the upper portion in sediment pond, establish thin slurry filter screen (44) wash sediment pond middle part, thin slurry export (42) are located wash sediment pond bottom, net sediment export (41) are located wash sediment pond top or the wash sediment pond lateral wall on thin slurry filter screen (44) upper portion, still be equipped with in washing sediment device (4) and be used for supplementary emission net sediment and with the sediment equipment of scraping that net sediment export (41) corresponds.

4. The shield tunneling machine mud residue filtering system of claim 1, wherein: rough filtration device (2) middle part is equipped with coarse filtration filter screen (21), sediment thick liquid advances pipe (1) and connects the upper portion of rough filtration device (2), the sediment thick liquid access connection of filter residue device (3) is in the lower part of rough filtration device (2).

5. The shield tunneling machine mud residue filtering system of claim 1, wherein: still including being used for with the sediment grain in the net thick liquid that filters out in filter residue device (3) is further smashed, the reducing mechanism (6) of rounding, reducing mechanism (6) with the net thick liquid exit linkage of filter residue device (3).

6. The shield tunneling machine mud residue filtering system of claim 1, wherein: the filter residue device is characterized by further comprising a specific gravity adjusting device (7) used for adjusting the specific gravity of the net slurry filtered out of the filter residue device (3), wherein the specific gravity adjusting device (7) is connected with a net slurry outlet of the filter residue device (3).

7. The shield tunneling machine mud residue filtering system of claim 1, wherein: the filter residue device is characterized by comprising at least two filter residue devices (3), wherein each filter residue device (3) is a piston type filter residue device (3), a residue slurry inlet of each filter residue device (3) is respectively connected with the corresponding rough filtering device (2), and a residue discharge port of each filter residue device (3) is respectively connected with the corresponding slag washing device (4).