Internal circulation flow increasing device for slurry shield

Abstract

The utility model relates to the technical field of slurry shields, in particular to a slurry shield internal circulation flow increasing device which comprises a cutterhead, a soil bin is installed on one side of the cutterhead, a slurry inlet pipe is installed in the center of one side of the soil bin, an auxiliary booster pump is installed on one side of the slurry inlet pipe, and a connecting pipe is installed on one side of the auxiliary booster pump. According to the improved slurry shield internal circulation flow increasing device, secondary pressurization can be conducted on slurry output by the slurry pump through mutual cooperation of the auxiliary booster pump and the slurry pump, and therefore the flow speed and flow of the slurry in a pipeline can be remarkably increased, the internal circulation flow of a soil bin can be increased conveniently, and the service life of the slurry shield is prolonged. And meanwhile, slurry scoured from the cutter head can enter the soil bin through the slurry taking pipe by virtue of the second pump body, so that the entering pressure of the slurry is increased, the circulating flow in the soil bin can be further increased, and the soil pressure and the water pressure of an excavation surface can be effectively balanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a slurry shield technical field, concretely is a slurry shield internal circulation flow increasing device. BACKGROUND

[0002] Slurry shield relates to using slurry shield machine to carry out the excavation and construction of underground tunnel. The slurry shield machine is a kind of equipment specially designed for the underground tunnel construction in soft soil or complex geological environment, it is cut by cutterhead soil layer, simultaneously utilize mud to the working face and exert pressure, prevent strata collapse and keep the stability of tunnel. Slurry shield technology is not only applicable to urban rail transit, underground pipeline and other projects, also widely used in the tunnel construction of seabed tunnel and other soft soil area.

[0003] The design process of the utility model finds that the prior art has the following problems:

[0004] The internal circulation system of general slurry shield may occur the insufficient internal circulation flow when the complex geological condition or larger diameter tunnel is excavated, so that the soil pressure and water pressure of excavation face are difficult to balance, and then collapse may be caused, so as to affect the safety during work. INVENTION CONTENTS

[0005] The utility model discloses a slurry shield internal circulation flow increasing device to solve the problems in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme: a slurry shield internal circulation flow increasing device, including cutterhead, the one side of cutterhead is installed with soil bin, the one side center of soil bin is installed with into slurry pipe, the one side of into slurry pipe is installed with auxiliary booster pump, the one side of auxiliary booster pump is installed with connecting pipe, the one side of connecting pipe is installed with slurry pump, the one side of slurry pump is installed with grouting pipe, the one side center of cutterhead is installed with flushing pipe, the one side of flushing pipe is installed with first pump body, the one side of first pump body is installed with into slurry pipe, the lower part of one side of cutterhead is installed with take slurry pipe, the one side of take slurry pipe is installed with second pump body, the one side of second pump body is installed with slurry discharge pipe.

[0007] Further preferably, the cutterhead is a rolling and scraping separation type cutterhead.

[0008] Further preferably, the inner wall of the grouting pipe is installed with a flow sensor.

[0009] Further preferably, the flow sensor and the auxiliary booster pump are electrically connected, and the flow sensor and the slurry pump are electrically connected.

[0010] Further preferably, the soil bin is provided with a slurry inlet at the center of one side, and a slurry outlet at the lower part of one side.

[0011] Further preferably, the diameter of the flushing pipe is smaller than that of the slurry inlet pipe.

[0012] Further preferably, the cutter head is provided with a first slot at the center of one side, and a second slot at the lower part of one side.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] Through the cooperation between the auxiliary booster pump and the mud pump, the mud output by the mud pump can be secondarily pressurized, so that the flow rate and flow of the mud in the pipeline can be significantly improved, so as to increase the circulating flow in the soil bin, and the flow can be adjusted through the flow sensor, so that the flow can be adjusted according to the actual construction condition, and the mud flushed down from the cutter head can enter the soil bin through the slurry taking pipe through the second pump body, so that the pressure of the entering mud is increased, so that the circulating flow in the soil bin can be further increased, so that the soil pressure and water pressure of the excavation surface can be effectively balanced, the risk of collapse of the excavation surface is reduced, and the construction safety is further ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front view structural schematic diagram of the utility model;

[0016] Figure 2 It is a front view explosion structural schematic diagram of the utility model;

[0017] Figure 3 It is a front view explosion structural schematic diagram of the utility model;

[0018] Figure 4 It is a side view structural schematic diagram of the utility model.

[0019] In the drawing: 1, cutter head; 2, soil bin; 3, slurry inlet pipe; 4, auxiliary booster pump; 5, connecting pipe; 6, mud pump; 7, grouting pipe; 8, flushing pipe; 9, first pump body; 10, slurry inlet pipe; 11, slurry taking pipe; 12, second pump body; 13, slurry outlet pipe. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0021] Please refer to Figures 1 to 4 The utility model provides a technical scheme: a slurry shield internal circulation flow increasing device, including the cutterhead 1, the one side of cutterhead 1 is installed with soil bin 2, the one side center of soil bin 2 is installed with the inlet pipe 3, the one side of inlet pipe 3 is installed with auxiliary booster pump 4, the one side of auxiliary booster pump 4 is installed with connecting pipe 5, the one side of connecting pipe 5 is installed with slurry pump 6, the one side of slurry pump 6 is installed with grouting pipe 7, the one side center of cutterhead 1 is installed with flushing pipe 8, the one side of flushing pipe 8 is installed with first pump body 9, the one side of first pump body 9 is installed with inlet pipe 10, the lower part of the one side of cutterhead 1 is installed with the pipe 11 of taking slurry, the one side of pipe 11 of taking slurry is installed with second pump body 12, the one side of second pump body 12 is installed with the pipe 13 of discharging slurry.

[0022] In the embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the cutterhead 1 is a rolling and scraping separation type cutterhead.

[0023] In the embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the inner wall of the grouting pipe 7 is installed with a flow sensor.

[0024] In the embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the flow sensor is electrically connected with the auxiliary booster pump 4, and the flow sensor is electrically connected with the slurry pump 6.

[0025] In the embodiment, as shown in Figure 1 and Figure 2 , the one side center of the soil bin 2 is provided with an inlet port, and the lower part of the one side of the soil bin 2 is provided with a slurry discharge port.

[0026] In the embodiment, as shown in Figure 3 and Figure 4 , the aperture of the flushing pipe 8 is smaller than the aperture of the inlet pipe 10.

[0027] In the embodiment, as shown in Figure 1 and Figure 2 , the one side center of the cutterhead 1 is provided with a first slot hole, and the lower part of the one side of the cutterhead 1 is provided with a second slot hole.

[0028] As shown in Figure 1 、 Figure 3 、 Figure 1 and Figure 3 Figure 1 Figure 2 Figure 3 Figure 4 , the slurry shield internal circulation flow increasing device is used, and the working process is as follows:

[0029] Firstly, the slurry is injected through the grouting pipe 7, and then the slurry pump 6 is used for pressurization work, and then flows through the connecting pipe 5, and then the auxiliary booster pump 4 is used for secondary pressurization, and then the slurry inlet pipe 3 is used for entering the soil bin 2 through the slurry inlet, so as to increase the circulating flow in the soil bin 2, then the cutter head 1 can be started to carry out the excavation work, and the probability of forming mud cake is reduced through the rolling and scraping separation type cutter head, and the first pump body 9 can be opened at the same time of the excavation work, the slurry in the soil bin 2 enters the flushing pipe 8 with smaller aperture through the slurry inlet pipe 10, the pressure of the slurry is increased, then the first slot hole is used for entering the cutter head 1, and then the cutter in the cutter head 1 can be flushed, then the second pump body 12 is opened, the slurry after flushing can carry the excavated gravel into the slurry taking pipe 11 and the slurry discharge pipe 13 through the second slot hole, and then enters the soil bin 2, at this time, the slurry can be pressurized, so as to further increase the circulating flow in the soil bin 2, so that the soil pressure and water pressure of the excavation surface can be effectively balanced, the risk of collapse of the excavation surface is reduced, the slurry in the soil bin 2 can be discharged through the slurry discharge port connecting pipeline, when the flow in the grouting pipe 7 is higher than the predetermined value of the flow sensor, the rotating speed of the auxiliary booster pump 4 and the slurry pump 6 is reduced, and then the flow regulation work is carried out.

[0030] The basic principle, main features and advantages of the utility model are shown and described above. The technical workers in the industry should understand that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only preferred examples of the utility model, and are not used to limit the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A device for increasing the internal circulation flow rate in a slurry shield, comprising a cutter head (1), characterised in that: The cutter head (1) is provided with a soil bin (2) on one side, a slurry inlet pipe (3) is installed at the center of one side of the soil bin (2), an auxiliary booster pump (4) is installed on one side of the slurry inlet pipe (3), a connecting pipe (5) is installed on one side of the auxiliary booster pump (4), a mud pump (6) is installed on one side of the connecting pipe (5), a grouting pipe (7) is installed on one side of the mud pump (6), a flushing pipe (8) is installed at the center of one side of the cutter head (1), a first pump body (9) is installed on one side of the flushing pipe (8), a slurry inlet pipe (10) is installed on one side of the first pump body (9), a slurry taking pipe (11) is installed at the lower part of one side of the cutter head (1), a second pump body (12) is installed on one side of the slurry taking pipe (11), and a slurry discharge pipe (13) is installed on one side of the second pump body (12).

2. The device for increasing the internal circulation flow rate of a slurry shield according to claim 1, characterized in that: The cutter head (1) is a rolling and scraping separation type cutter head.

3. The device for increasing the internal circulation flow rate of a slurry shield according to claim 1, characterized in that: A flow sensor is installed on the inner wall of the grouting pipe (7).

4. The device for increasing the internal circulation flow rate of a slurry shield according to claim 3, characterized in that: The flow sensor is electrically connected with the auxiliary booster pump (4), and the flow sensor is electrically connected with the mud pump (6).

5. The device for increasing the internal circulation flow rate of a slurry shield according to claim 1, characterized in that: A slurry inlet opening is formed at the center of one side of the soil bin (2), and a slurry discharge opening is formed at the lower part of one side of the soil bin (2).

6. The device for increasing the internal circulation flow rate of a slurry shield according to claim 1, characterized in that: The aperture of the flushing pipe (8) is smaller than the aperture of the slurry inlet pipe (10).

7. The device for increasing the internal circulation flow rate of a slurry shield according to claim 1, characterized in that: A first slot hole is formed at the center of one side of the cutter head (1), and a second slot hole is formed at the lower part of one side of the cutter head (1).

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