CN105257305A - Slag discharging mechanism of shield tunneling machine and muddy water balance shield tunneling machine - Google Patents

Abstract

The invention discloses a slag discharge mechanism of a mud-water balance shield machine and a mud-water balance shield machine. The slag discharge mechanism includes a mud discharge pipeline and an earth bin for storing muck. A separation device for separating the mud and gravel in the muck is provided between the soil bin and the mud discharge pipeline. The input end of the separation device is connected, the mud output end of the separation device is connected with the mud discharge pipeline, and the gravel output end of the separation device is provided with a gravel discharge device; the mud-water balance shield machine includes a shield body and the above-mentioned slag discharge mechanism, The slag discharge mechanism is arranged in the shield body. The invention has the advantages of improving the safety and stability of the slag discharge system of the mud-water balance shield machine and improving construction efficiency.

Description

A slag discharge mechanism of a shield machine and a mud-water balance shield machine

technical field

The invention relates to the technical field of shield machines, in particular to a slag discharge mechanism of a shield machine and a mud-water balance shield machine.

Background technique

The existing mud-water shield construction needs to crush large-sized pebbles into gravels below 100mm, pass through the grid and enter the mud discharge pipe, and complete the muck transportation through the mud discharge pipe.

For the geology of water-rich and large-size pebble-sand interbedded strata represented by Lanzhou and Chengdu, due to the large amount of pebbles and large particle size (the maximum particle size can reach 500mm), the existing mud-water balance shield machine is broken when the gravel is broken. , pipeline slag carrying and other aspects can not achieve satisfactory results. Specifically, due to the limited crushing capacity of the existing mud-water balance shield machine, the amount of muck entering the soil bin of the shield machine within a unit time cannot be too much, and the advancement speed of the shield machine is limited, resulting in low construction efficiency of the shield machine. The construction progress is slow; and the gravel produced by the crushing of large-sized pebbles will cause wear to the mud pump and mud-water circulation pipeline, and the equipment maintenance cost is high. At the same time, pipeline deposition will impact the mud system and affect the stability of slag carrying. It can be seen that the existing mud-water shield machine cannot be applied on a large scale in the geology of water-rich and large-size pebble-sand interbedded formations. Due to the harsh hydrological environment in some areas, in order to ensure the safety and reliability of the construction, mud-water shields had to be used for construction.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a slag discharge mechanism and a mud-water balance shield machine of the shield machine, which improve the safety and stability of the slag discharge system and improve the construction efficiency.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A slag discharge mechanism of a shield machine, including a mud discharge pipeline and a soil bin for storing muck, and a separation device for separating mud and gravel in the muck is provided between the soil bin and the mud discharge pipeline. device, the soil bin communicates with the input end of the separation device, the mud output end of the separation device communicates with the mud discharge pipeline, and the gravel output end of the separation device is provided with a gravel discharge device.

Compared with the prior art, the present invention has the advantages of:

In the present invention, a separation device for separating mud and gravel in the mud and gravel is provided between the soil bin and the mud discharge pipeline. At this time, the mud and gravel mixed with the mud and gravel are directly transported to the separation device through the soil bin to separate the mud and gravel. The amount of slag feed caused by the gravel crusher is limited by the crushing capacity of the existing shield machine, and the construction efficiency is low, which effectively improves the construction efficiency of the mud-water shield and expands the geological adaptability of the shield machine; at the same time, the separation The mud output end of the device is connected to the mud discharge pipeline, so that the mud discharge pipeline is free of large grains of gravel, reducing the load and wear of the pipeline, reducing equipment maintenance costs, and improving the safety and stability of the slag discharge system. The present invention further sets up three sets of separation boxes, and the three sets of separation boxes switch cycles, that is, one set is connected to the mud circulation system, one set is used for gravel slagging, and one set is used for gravel slagging preparation, which avoids the impact of gravel slagging The impact of mud circulation ensures the continuity of mud circulation and slag discharge, and improves the mud circulation capacity.

As a further improvement of the above technical solution:

The separation device includes a separation box for separating mud and gravel and a bipolar screw conveyor for transporting muck to the separation box. The two ends of the bipolar screw conveyor are respectively connected to the soil bin and the separation box body connected. The double-pole screw conveyor is used to improve the pressure-holding and anti-spray ability of the screw conveyor during slag discharge.

The mud output end is a mud output port provided on the separation box for mud output, and the gravel output end is a slag discharge port provided on the separation box for gravel discharge. A filter grid is provided for mud to pass through, and a shut-off valve for connecting or cutting off the gravel is provided at the slag outlet. The filter grid allows the mud in the dregs to pass through, and the gravel in the dregs cannot pass through the filter grid, which realizes the effective separation of the dregs; the shut-off valve is used to connect or cut off the gravel, and when the shut-off valve is connected, the separation box The gravel is discharged from the slag outlet.

The separation device also includes a controller and a load cell for detecting the weight of the muck in the separation box, the input end of the controller is connected to the load cell, the output end is connected to the shut-off valve, and the input end of the controller receives the The input signal of the weighing sensor is used, and the output terminal outputs a control signal to control the on-off of the shut-off valve. The setting of the weighing sensor and the controller realizes the automatic adjustment control of the shut-off valve.

The filter aperture of the filter grid is 5-40 mm.

The separation box is connected to the bipolar screw conveyor through a connecting pipeline, and a first on-off valve is provided on the connecting pipeline and the sludge discharge pipeline, and the first on-off valve controls the on-off of the pipeline.

The separation box is provided with a water pressure balance assembly for ensuring the water pressure balance in the separation box. The water pressure balance assembly includes an exhaust pipe, a pressure relief valve and a second on-off valve for controlling the on-off of the exhaust pipe. Both the pressure relief valve and the second on-off valve are arranged on the exhaust pipe. The pressure relief valve adopts a hollow float check valve with electric signal, and the second on-off valve adopts a ball valve.

The separation box is provided with a slurry filling assembly for discharging the air inside the separation box. The slurry filling assembly includes a slurry filling pipeline and a slurry filling valve. The slurry filling pipeline communicates with the inside of the separation box. The slurry filling The valve is arranged on the slurry filling pipeline.

The separation box is provided with a vibrating device for vibrating slag discharge.

The gravel discharge device includes a belt conveyor, the belt conveyor is arranged inclined up and down, and a mud storage tank is provided at the bottom of the belt conveyor, and the mud storage tank collects a small amount of mud contained in the gravel.

The separation boxes are divided into three groups, and the three groups of separation boxes are respectively a mud circulation group, a gravel slagging group and a gravel slagging preparation group. The arrangement of three sets of separation boxes 31 effectively avoids the impact of mud circulation on gravel slag discharge, ensures the continuity of mud circulation and slag discharge, and improves the mud circulation capacity.

A mud-water balance shield machine, comprising a shield body and a slag discharge mechanism of the above-mentioned shield machine, the slag discharge mechanism is arranged in the shield body. The shield machine of the present invention also has the advantages of improving the safety and stability of the slag discharge system, improving construction efficiency, and the like.

Description of drawings

Hereinafter, the present invention will be described in more detail based on the embodiments with reference to the accompanying drawings. in:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a top view structural representation of the present invention;

Fig. 3 is a structural representation of the separation box of the present invention;

Fig. 4 is a flow chart of the shield tunneling slag discharge cycle of the present invention.

In the figures, the same parts are given the same reference numerals. The figures are not drawn to scale.

Each label in the figure means:

1. Mud discharge pipeline; 2. Soil bin; 3. Separation device; 31. Separation box; 311. Mud output port; 312. Slag discharge port; 313. Filter grille; 314. Block valve; 32. Bipolar Screw conveyor; 33. Load cell; 4. Connecting pipeline; 5. Water pressure balance component; 51. Exhaust pipe; 52. Pressure relief valve; 53. Second on-off valve; 6. First on-off valve 7. Slurry filling assembly; 71. Slurry filling pipeline; 72. Slurry filling valve; 8. Vibration device; 9. Gravel discharge device; 91. Belt conveyor; 10. Mud storage tank.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 to 3, the slag discharge mechanism of the shield machine in this embodiment includes a mud discharge pipeline 1 and a soil bin 2, and the soil bin 2 is used to temporarily store the slag cut from the cutter head of the shield machine Soil, the separation device 3 is provided between the soil bin 2 and the mud discharge pipeline 1, the separation device 3 is used to separate the mud and gravel in the muck, the soil bin 2 is connected with the input end of the separation device 3, and the separation device 3 The mud output end communicates with the mud discharge pipeline 1 , and the gravel output end of the separation device 3 is provided with a gravel discharge device 9 . In the present invention, a separation device 3 is provided between the soil bin 2 and the mud discharge pipeline 1. At this time, the mud mixed with gravel is directly transported to the separation device 3 through the soil bin 2 to separate the mud and gravel, which avoids the existing shield tunneling. The amount of slag fed by the gravel crusher is limited by the crushing capacity and the construction efficiency is low, which effectively improves the construction efficiency of the slurry shield machine and expands the geological adaptability of the shield machine; at the same time, the mud of the separation device 3 The output end is connected with the sludge discharge pipeline 1, so that the sludge discharge pipeline 1 is free of large-grained gravel, which reduces the load and pipeline wear of the sludge discharge pipeline 1, reduces equipment maintenance costs, and improves the safety and stability of the slag discharge system.

In this embodiment, the separation device 3 includes a separation box 31 and a bipolar screw conveyor 32. The separation box 31 is used to separate the mud and gravel in the muck, and the bipolar screw conveyor 32 is used to transport the muck to the separation stage. Casing 31, the feed end of bipolar screw conveyor 32 is communicated with soil bin 2, the discharge end of bipolar screw conveyor 32 is communicated with separation box body 31, and the feed end of bipolar screw conveyor 32 is lower than bipolar screw conveyor 32. The discharge end of the pole screw conveyor 32. In this embodiment, the double-pole screw conveyor 32 is used to improve the pressure-holding and anti-splash capabilities of the screw conveyor during slag discharge. In order to avoid the lack of turning ability and structural complexity of the double-pole screw conveyor 32, the The screw shafts of the machine 32 are separated by a certain distance to form a soil plug. Even if the spiral gushing phenomenon occurs occasionally, when the muddy water supply capacity is greater than its consumption, it can also serve the purpose of maintaining pressure; at the same time, the double pole can be adjusted. The rotational speed difference between the two-stage screw shafts of the screw conveyor 32 can also form a soil plug quickly. In other embodiments, as long as the conveying components capable of conveying the muck to the separation box 31 should be within the protection scope of the present invention, such as belt conveyors, single-pole screw conveyors and the like.

In this embodiment, the separation boxes 31 are divided into three groups, and the three groups of separation boxes 31 are respectively the mud circulation group, the gravel slagging group and the gravel slagging preparation group, that is, the three groups of separation boxes 31 can switch cycles, that is, one group The slag enters the separation box 31 for separation and mud circulation; a group of gravel is discharged from the separation box 31 for gravel slag discharge; a group of separation box 31 is filled with gravel and enters the gravel slag discharge preparation. The arrangement of three sets of separation boxes 31 effectively avoids the impact of mud circulation on gravel slag discharge, ensures the continuity of mud circulation and slag discharge, and improves the mud circulation capacity.

In this embodiment, the mud output end is the mud output port 311, the gravel output end is the slag discharge port 312, the mud output port 311 and the slag discharge port 312 are all arranged on the separation box body 31, and the mud output port 311 is arranged on the separation box body 31, the slag outlet 312 is located at the bottom of the separation box 31; the mud outlet 311 is provided with a filter grid 313, the filter grid 313 is for the mud in the dregs to pass through, and the gravel in the dregs cannot Through the filter grid 313, the effective separation of slag is realized. In the present embodiment, the aperture of the filter hole of the filter grid 313 is 10mm. In other examples, the size of the filter hole of the filter grid 313 can be selected according to the size of the gravel , It is enough to ensure that the gravel in the slag cannot pass through, such as the aperture of the filter hole is 5mm, 20mm, 30mm, 40mm; the slag outlet 312 is provided with a shut-off valve 314, which is used to connect or cut off the gravel, and the shut-off valve When 314 is turned on, the gravel in the separation box 31 is discharged from the slag discharge port 312 . In this embodiment, the cut-off valve 314 is a gate valve. In other embodiments, as long as the valve body that can realize the connection or cut-off of the slag discharge port 312 should be within the scope of protection of the present invention, such as gate valves, plug valves, ball valves, etc. .

In this embodiment, the separation device 3 also includes a controller and a load cell 33, the load cell 33 detects the weight of the muck in the separation box 31, the input end of the controller is connected to the load cell 33, and the output end of the controller is connected to For the cut-off valve 314 , the input end of the controller receives the input signal from the load cell 33 , and the output end of the controller outputs a control signal to control the cut-off valve 314 to be turned on or off. When the separation box 31 is full of gravel, the controller outputs a control signal to the cut-off valve 314 according to the weighing signal of the load cell 33, and the cut-off valve 314 is connected to discharge the gravel. The setting of the load cell 33 and the controller realizes the cut-off valve. 314 automatic adjustment control.

In this embodiment, the separation box 31 is connected to the bipolar screw conveyor 32 through the connecting pipeline 4, and the first on-off valve 6 is provided on the connecting pipeline 4 and the mud discharge pipeline 1, and the first on-off valve 6 To control the on-off of the pipeline, in this embodiment, the first on-off valve 6 is a ball valve. When the first on-off valve 6 is connected, the muck enters the separation box 31 from the connecting pipeline 4, and the separated mud is discharged from the mud discharge pipeline 1 through the filter grid 313, forming a mud circulation.

In this embodiment, the separation box 31 is provided with a water pressure balance assembly 5, the water pressure balance assembly 5 is used to ensure the water pressure balance in the separation box 31, the water pressure balance assembly 5 includes an exhaust pipe 51, a pressure relief valve 52 And the second on-off valve 53, the pressure relief valve 52 is used to release the pressure on the separation box 31 before discharging the separated gravel, the second on-off valve 53 controls the on-off of the exhaust pipe 51, the pressure relief valve 52 and The second on-off valves 53 are all arranged on the exhaust pipe 51 . In this embodiment, the pressure relief valve 52 adopts a hollow float check valve with an electric signal, and the second on-off valve 53 adopts a ball valve. The valve body structure of exhaust pipe 51 on-off should all be within the scope of protection of the present invention.

In this embodiment, the separation box 31 is provided with a slurry filling assembly 7, which is used to discharge the internal air of the separation box 31 before the muck is transported to the separation box 31. The slurry filling assembly 7 includes a slurry filling assembly The pipeline 71 and the slurry filling valve 72, the slurry filling pipeline 71 communicates with the inside of the separation box 31, the slurry filling valve 72 is arranged on the slurry filling pipeline 71, and the slurry filling valve 72 is a ball valve.

In this embodiment, the gravel discharge device 9 includes a belt conveyor 91, and the belt conveyor 91 outputs the discharged gravel. The belt conveyor 91 is arranged inclined up and down. The bottom end of the belt conveyor 91 is provided with a mud storage tank 10, and the mud storage Trough 10 collects the small amount of mud contained within the gravel.

In this embodiment, a vibrating device 8 is provided on the separation box 31, and the vibrating device 8 is used to vibrate the separation box 31 to quickly discharge gravel from the box. In this embodiment, the feeding end of the bipolar screw conveyor 32 is provided with an agitator, and the setting of the agitator can make the muck enter the bipolar screw conveyor 32 more smoothly.

As shown in Figure 4, the slagging method of the shield machine of the present embodiment comprises the following steps:

Step 1): Discharging the slag, transporting the slag cut by the cutter head to the soil bin 2 of the shield machine;

Step 2): separation, separating the gravel in the muck in the soil bin 2 from the mud;

Step 3): Slag discharge, the separated mud is discharged from the mud discharge pipeline 1 of the shield machine, and the separated gravel is discharged from a gravel discharge device 9 .

In this embodiment, in step 2), a screw conveyor is used to transport the muck in the soil bin 2 to a separation box 31, and the separation of gravel and mud is carried out in the separation box 31. In this embodiment, The screw conveyor is a bipolar screw conveyor 32; in this embodiment, a filter grid 313 and a shut-off valve 314 are arranged on the separation box 31, and the separated mud enters the mud discharge pipeline 1 through the filter grid 313, and the separated mud The gravel enters the gravel discharge device 9 through the shut-off valve 314 .

In this embodiment, before the muck is transported to the separation box 31, the slurry filling assembly 7 is used to fill the separation box 31 with mud to discharge the air in the separation box 31; when the muck is transported to the separation box 31, Utilize weighing sensor 33 to detect the weight of the muck in the separation box 31, control the cut-off valve 314 on-off by the weight detected, when the separation box 31 is filled with gravel, the cut-off valve 314 is connected to discharge the gravel.

In this embodiment, before the cut-off valve 314 is connected to discharge the separated gravel, the pressure relief valve 52 is used to relieve the pressure of the separation box 31; when the cut-off valve 314 is connected to discharge the separated gravel, the vibration device 8 is used to vibrate and separate The box 31 enables rapid discharge of the separated gravel.

In this embodiment, when the gravel is discharged from the separation box 31, the load cell 33 is used to detect the weight of the muck in the separation box 31, and the cut-off valve 314 is controlled by detecting the weight. Valve 314 is closed to stop slagging.

In this embodiment, three sets of separation boxes 31 are set, one set is used for mud circulation, one set is used for gravel slagging, and one set is used for gravel slagging preparation, that is, the three sets of separation boxes 31 can switch cycles, namely A group of slag enters the separation box 31 for separation and mud circulation; a group of gravel is discharged from the separation box 31 for gravel slag discharge; a group of separation box 31 is filled with gravel and enters the gravel slag discharge preparation. The three sets of separation boxes 31 avoid the influence of gravel slag discharge on mud circulation, ensure the continuity of mud circulation and slag discharge, and improve the mud circulation capacity.

In this embodiment, the flow process of the slag discharge method of the shield machine in a specific embodiment is: 1. Open the slurry filling valve 72 to fill the slurry, and when the separation box 31 is full of muddy water, close the slurry filling valve 72 and the pressure relief valve 52 and the second on-off valve 53 to complete the preparation for mud circulation; 2. Open the first on-off valve 6, the muck enters the separation box 31 from the connecting pipeline 4, and the separated mud passes through the filter grid 313 from the mud discharge pipe 3. When the separation box 31 is filled with gravel, close the first on-off valve 6, open the pressure relief valve 52 and the second on-off valve 53 to relieve the pressure of the separation box 31, and then , the controller outputs a control signal to the cut-off valve 314 according to the weighing signal of the load cell 33, and the cut-off valve 314 is connected to discharge the gravel. At this time, the other two groups separate the box 31, one group performs mud circulation, and the other group performs gravel discharge. Slag preparation; 4. Open the vibrating device 8, the vibrating device 8 vibrates to quickly discharge the gravel from the separation box 31, and the belt conveyor 91 is opened to output the gravel; 5. When the gravel in the separation box 31 is emptied, the control The controller outputs a control signal to the shut-off valve 314 according to the weighing signal of the load cell 33, and the shut-off valve 314 is closed to stop slag discharge.

Fig. 1 and Fig. 2 show the embodiment of the slurry balance shield machine of the present invention, the shield machine includes the slag discharge mechanism of the shield machine described in the above embodiment, and the slag discharge mechanism is arranged in the shield body. The shield machine of the present invention also has the advantages of improving the safety and stability of the slag discharge system, improving construction efficiency, and the like.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for parts thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (12)

1. the slagging device of a shield machine, comprise mud line and the Tu Cang for depositing dregs, it is characterized in that, described Tu Cang and the separator be provided with between mud line for the mud in dregs is separated with gravel, described Tu Cang is communicated with the input of separator, the mud output of described separator is communicated with mud line, and the gravel output of described separator is provided with gravel discharger.

2. the slagging device of shield machine according to claim 1, it is characterized in that, described separator comprise for separating of mud and gravel be separated casing and for dregs being delivered to the double-pole spiral conveyer being separated casing, the two ends of described double-pole spiral conveyer are respectively with Tu Cang and be separated casing and be communicated with.

3. the slagging device of shield machine according to claim 2, it is characterized in that, described mud output is be located on described separation casing for the mud delivery outlet that mud exports, described gravel output is be located on described separation casing for the slag-drip opening that gravel is discharged, described mud equipped at outlet port is provided with the filtering grid passed through for mud, and described slag-drip opening place is provided with the block valve for connecting or block gravel.

4. the slagging device of shield machine according to claim 3, it is characterized in that, described separator also comprises controller and the LOAD CELLS for detecting dregs weight in separation casing, the input of described controller connects LOAD CELLS, output connects block valve, the input of described controller receives the input signal of described LOAD CELLS, and output exports control signal and controls described block valve break-make.

5. the slagging device of shield machine according to claim 3, is characterized in that, the pore size filter of filtering grid is 5 ~ 40mm.

6. the slagging device of shield machine according to claim 2, is characterized in that, described separation casing is connected with double-pole spiral conveyer by connecting line, described connecting line and mud line is equipped with the first on-off valve of control piper break-make.

7. the slagging device of shield machine according to claim 6, it is characterized in that, described separation casing is provided with the hydraulic balance assembly for ensureing to be separated hydraulic balance in casing, described hydraulic balance assembly comprises stack, relief valve and controls the second on-off valve of stack break-make, and described relief valve and the second on-off valve are all located on described stack.

8. the slagging device of shield machine according to claim 7, it is characterized in that, described separation casing be provided with for discharge be separated casing inner air fill slurry assembly, the described slurry assembly that fills comprises and fills slurry pipeline and fill slurry valve, describedly fill slurry pipeline and be separated box house and be communicated with, described in fill slurry valve and be located to fill and starch on pipeline.

9. the slagging device of the shield machine according to claim 2 to 8 any one, is characterized in that, described separation casing is provided with the tamping equipment for vibrating, deslagging.

10. the slagging device of the shield machine according to claim 1 to 8 any one, is characterized in that, described gravel discharger comprises belt conveyor, and described belt conveyor is that tilted upward is arranged, the bottom of described belt conveyor is provided with storage mud groove.

The slagging device of 11. shield machines according to claim 2 to 8 any one, it is characterized in that, described separation casing is three groups, is separated casing and is respectively mud circulation group, gravel deslagging group and gravel deslagging preparation group described in three groups.

12. 1 kinds of slurry balance shield machines, comprise shield body, it is characterized in that, comprise the slagging device of the shield machine as described in claim 1 to 11 any one, and described slagging device is arranged in described shield body.