Residue soil conveying device of shield tunneling machine

Abstract

The invention relates to the technical field of shield construction, and discloses a shield tunneling machine muck conveying device which comprises a muck bin. The conveying pipe is communicated with the soil bin, and a slag outlet is formed in one end, far away from the soil bin, of the conveying pipe; the spiral conveying mechanism is arranged in the conveying pipe and is used for transferring muck in the soil bin towards the slag outlet in the conveying pipe; the infiltration mechanism is arranged on the side wall of the conveying pipe; the direct-current power source is connected with the spiral conveying mechanism and the percolation mechanism so that anode current can be connected to the spiral conveying mechanism, cathode current can be connected to the percolation mechanism, an electric field is formed between the anode current and the cathode current, and when the muck in the conveying pipe passes through the electric field, moisture in the muck is migrated towards the percolation mechanism, and the muck in the conveying pipe is discharged. According to the device, water in the muck can move towards the infiltration mechanism with cathode current, the separation effect of the water in the muck is improved, the centrifugal slurry pump does not need to be disassembled and assembled frequently, energy is saved, and energy consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of shield construction, in particular to a slag conveying device for a shield machine. Background Art

[0002] In the existing earth pressure balance shield machine, the soil is discharged from the soil bin using a spiral pipe system. The soil has a large pressure (including water pressure) in the soil bin. When the moisture content of the soil is low, the friction between the soil and the soil, the soil and the spiral pipe, and the soil and the belt is large, and the pressure drops quickly. Therefore, the pressure can be reduced to zero at the end of the spiral pipe by increasing the length of the spiral pipe or using a double spiral pipe. However, for soil with high moisture content, no matter which of the above methods is used, it is difficult to reduce the soil pressure to zero at the end of the spiral pipe.

[0003] The existing method is usually to add a centrifugal mud pump at the end of the spiral conveying pipe, so that when the soil has less water and becomes more watery, it is necessary to add or subtract a centrifugal mud pump, because the soil with less water has a low pressure after passing through the spiral pipe, and the effect of the centrifugal mud pump (the greater the pressure entering the mud pump, the better the effect) is not obvious and is relatively redundant, wasting energy. When there is more water, a centrifugal mud pump needs to be added. Such addition and subtraction is not only cumbersome to operate, but also causes energy waste. Summary of the invention

[0004] The object of the present invention is to provide a shield machine slag conveying device, aiming to solve or improve at least one of the above-mentioned technical problems.

[0005] To achieve the above object, the present invention provides the following solution: The present invention provides a shield machine slag conveying device, comprising:

[0006] Soil bin, used to hold the excavated soil from the shield machine;

[0007] A conveying pipe is connected to the soil bin, and a slag outlet is provided at one end of the conveying pipe away from the soil bin;

[0008] A screw conveying mechanism is disposed in the conveying pipe and is used to transfer the slag in the soil bin in the conveying pipe toward the slag outlet;

[0009] A percolation mechanism is arranged on the side wall of the conveying pipe, and the moisture in the slag in the conveying pipe can be discharged from the conveying pipe through the percolation mechanism;

[0010] A direct current power supply is respectively connected to the screw conveying mechanism and the infiltration mechanism, so that an anode current is connected to the screw conveying mechanism and a cathode current is connected to the infiltration mechanism, wherein an electric field is formed between the anode current and the cathode current, and when the slag in the conveying pipe passes through the electric field, the moisture in the slag migrates toward the infiltration mechanism.

[0011] Optionally, the spiral conveying mechanism includes:

[0012] A rotating shaft, rotatably disposed in the conveying pipe;

[0013] A spiral blade, fixedly connected to the rotating shaft, the anode current being connected to the spiral blade;

[0014] A driver is used to drive the rotating shaft to rotate.

[0015] Optionally, the spiral conveying mechanism further includes a conductive slip ring, the stator of the conductive slip ring is connected to the conveying pipe, the rotor of the conductive slip ring is connected to the rotating shaft, and the stator and rotor of the conductive slip ring are electrically connected to the DC power supply and the spiral blades respectively through wires.

[0016] Optionally, the filtration mechanism comprises:

[0017] A notch is formed on the side wall of the delivery pipe;

[0018] A filter plate is arranged in the notch, and the filter plate is electrically connected to the DC power supply through a wire.

[0019] Optionally, the filtration mechanism further comprises a water collecting cover, which is covered on the outside of the filter plate, a water collecting channel is formed between the water collecting cover and the filter plate, and a drainage port connected to the water collecting channel is provided on the water collecting cover.

[0020] Optionally, an insulating layer is coated on the rotating shaft.

[0021] Optionally, the side wall of the conveying pipe is coated with an insulating layer.

[0022] Optionally, the water collecting cover is made of insulating material.

[0023] Optionally, the driver is a motor, which is fixedly mounted on one end of the conveying pipe via a mounting bracket, and the output shaft of the motor is connected to the rotating shaft.

[0024] Optionally, the spiral blades and the filter plate are both made of metal materials.

[0025] The present invention discloses the following technical effects: when the slag in the soil bin is discharged through the conveying pipe by the spiral conveying mechanism, the spiral conveying mechanism and the infiltration mechanism are energized by a DC power supply, so that an electric field is formed between the anode current and the cathode current, so that when the slag passes through the electric field, the moisture in the slag moves toward the infiltration mechanism with the cathode current, thereby accelerating the water separation effect in the slag, thereby discharging the moisture through the infiltration mechanism, dehydrating the slag in the conveying pipe, and quickly weakening the water pressure, and then cooperating with the conveying of the spiral conveying mechanism so that the pressure of the slag reaching the slag outlet is effectively reduced to zero, and there is no need to frequently disassemble and assemble the centrifugal mud pump, which is conducive to realizing a small-diameter shield tunnel, greatly saving energy and reducing energy consumption, and can be widely used in strata with different geological conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 is a cross-sectional view of a delivery pipe of the present invention;

[0029] Figure 3 It is a partial cross-sectional view of the filter plate and water collecting cover of the present invention.

[0030] In the figure: 1. Soil bin; 2. Conveying pipe; 3. Slag outlet; 4. DC power supply; 5. Rotating shaft; 6. Spiral blade; 7. Driver; 8. Conductive slip ring; 9. Filter plate; 10. Water collecting cover; 11. Drainage outlet. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Reference Figure 1-Figure 3 The present invention provides a shield machine slag conveying device, comprising:

[0034] Soil bin 1, used to hold the soil excavated by the shield machine;

[0035] The conveying pipe 2 is connected to the soil bin 1, and a slag outlet 3 is provided at one end of the conveying pipe 2 away from the soil bin 1;

[0036] The screw conveying mechanism is arranged in the conveying pipe 2 and is used to transfer the slag in the soil bin 1 toward the slag outlet 3 in the conveying pipe 2;

[0037] The infiltration mechanism is arranged on the side wall of the conveying pipe 2, and the moisture in the slag in the conveying pipe 2 can be discharged from the conveying pipe 2 through the infiltration mechanism;

[0038] A DC power supply 4 is connected to the screw conveying mechanism and the infiltration mechanism, respectively, so that an anode current is connected to the screw conveying mechanism and a cathode current is connected to the infiltration mechanism, wherein an electric field is formed between the anode current and the cathode current. When the slag in the conveying pipe 2 passes through the electric field, the moisture in the slag migrates toward the infiltration mechanism.

[0039] When the slag in the soil bin 1 is discharged through the conveying pipe 2 by the screw conveying mechanism, the screw conveying mechanism and the infiltration mechanism are energized by the DC power supply 4, so that an electric field is formed between the anode current and the cathode current. When the slag passes through the electric field, the moisture in the slag moves toward the infiltration mechanism with the cathode current, thereby accelerating the separation of moisture in the slag. The moisture is discharged through the infiltration mechanism, and the slag in the conveying pipe 2 is dehydrated, the water pressure is quickly weakened, and the conveying of the screw conveying mechanism is combined with the effective reduction of the slag pressure reaching the slag outlet 3 to zero. There is no need to frequently disassemble and assemble the centrifugal mud pump, which is conducive to the realization of a small-diameter shield tunnel, greatly saving energy and reducing energy consumption.

[0040] In one embodiment of the present invention, the screw conveying mechanism comprises:

[0041] A rotating shaft 5 is rotatably disposed in the conveying pipe 2;

[0042] The spiral blade 6 is fixedly connected to the rotating shaft 5, and an anode current is connected to the spiral blade 6;

[0043] The driver 7 is used to drive the rotating shaft 5 to rotate.

[0044] The driver 7 drives the rotating shaft 5 to rotate, and the rotating shaft 5 drives the spiral blade 6 to rotate, so as to realize the transfer and transportation of the slag.

[0045] In one embodiment of the present invention, the screw conveying mechanism also includes a conductive slip ring 8, the stator of the conductive slip ring 8 is connected to the conveying pipe 2, the rotor of the conductive slip ring 8 is connected to the rotating shaft 5, and the stator and rotor of the conductive slip ring 8 are electrically connected to the DC power supply 4 and the spiral blade 6 through wires respectively.

[0046] By providing the conductive slip ring 8 , it is possible to ensure electrical connection between the DC power supply 4 and the spiral blade 6 when the spiral blade 6 rotates.

[0047] In one embodiment of the present invention, the infiltration mechanism comprises:

[0048] A notch is provided on the side wall of the delivery pipe 2;

[0049] The filter plate 9 is disposed in the notch, and the filter plate 9 is electrically connected to the DC power supply 4 via a wire.

[0050] The water can be filtered out by providing the filter plate 9 , and the cathode current on the filter plate 8 and the anode current on the spiral blade 6 jointly construct an electric field.

[0051] In one embodiment of the present invention, the infiltration mechanism further includes a water collecting cover 10, which is covered on the outside of the filter plate 9, and a water collecting channel is formed between the water collecting cover 10 and the filter plate 9. The water collecting cover 10 is provided with a drain port 11 connected to the water collecting channel.

[0052] The water collecting channel on the water collecting cover 10 can discharge the water filtered by the filter plate 9 from the drain port 11 in a centralized manner.

[0053] In one embodiment of the present invention, the rotating shaft 5 is coated with an insulating layer to prevent electrical conduction.

[0054] In one embodiment of the present invention, the side wall of the delivery pipe 2 is coated with an insulating layer to prevent electrical conduction.

[0055] In one embodiment of the present invention, the water collecting cover 10 is made of insulating material to prevent electrical conduction.

[0056] In one embodiment of the present invention, the driver 7 is a motor, which is fixedly mounted on one end of the conveying pipe 2 via a mounting bracket, and the output shaft of the motor is connected to the rotating shaft 5 .

[0057] In one embodiment of the present invention, the spiral blades 6 and the filter plate 9 are both made of metal materials and have good electrical conductivity.

[0058] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0059] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A shield machine slag conveying device, characterized in that: include: A soil bin (1) for accommodating the soil excavated by the shield machine; A conveying pipe (2) is connected to the soil bin (1), and a slag outlet (3) is provided at one end of the conveying pipe (2) away from the soil bin (1); A screw conveying mechanism is arranged in the conveying pipe (2) and is used to transfer the slag in the soil bin (1) in the conveying pipe (2) toward the slag outlet (3); A percolation mechanism is arranged on the side wall of the conveying pipe (2), and moisture in the soil in the conveying pipe (2) can be discharged from the conveying pipe (2) through the percolation mechanism; A direct current power supply (4) is connected to the screw conveying mechanism and the infiltration mechanism respectively, so that an anode current is connected to the screw conveying mechanism and a cathode current is connected to the infiltration mechanism, wherein an electric field is formed between the anode current and the cathode current, and when the slag in the conveying pipe (2) passes through the electric field, the moisture in the slag migrates toward the infiltration mechanism.

2. A shield machine slag conveying device according to claim 1, characterized in that: The spiral conveying mechanism comprises: A rotating shaft (5) rotatably disposed in the delivery pipe (2); A spiral blade (6) is fixedly connected to the rotating shaft (5), and the anode current is connected to the spiral blade (6); A driver (7) is used for driving the rotating shaft (5) to rotate.

3. A shield machine slag conveying device according to claim 2, characterized in that: The screw conveying mechanism further comprises a conductive slip ring (8), the stator of the conductive slip ring (8) being connected to the conveying pipe (2), the rotor of the conductive slip ring (8) being connected to the rotating shaft (5), and the stator and rotor of the conductive slip ring (8) being electrically connected to the DC power supply (4) and the spiral blade (6) respectively through wires.

4. A shield machine slag conveying device according to claim 2, characterized in that: The infiltration mechanism comprises: A notch is formed on the side wall of the delivery pipe (2); A filter plate (9) is arranged in the notch, and the filter plate (9) is electrically connected to the DC power supply (4) via a wire.

5. A shield machine slag conveying device according to claim 4, characterized in that: The infiltration mechanism further comprises a water collecting cover (10) which covers the outside of the filter plate (9), a water collecting channel is formed between the water collecting cover (10) and the filter plate (9), and a drainage port (11) which is connected to the water collecting channel is provided on the water collecting cover (10).

6. A shield machine slag conveying device according to claim 2, characterized in that: The rotating shaft (5) is coated with an insulating layer.

7. The shield machine slag conveying device according to claim 1, characterized in that: The side wall of the delivery pipe (2) is coated with an insulating layer.

8. The shield machine slag conveying device according to claim 5, characterized in that: The water collecting cover (10) is made of insulating material.

9. The shield machine slag conveying device according to claim 2, characterized in that: The driver (7) is a motor, which is fixedly mounted on one end of the conveying pipe (2) via a mounting frame, and the output shaft of the motor is connected to the rotating shaft (5).

10. The shield machine slag conveying device according to claim 4, characterized in that: The spiral blade (6) and the filter plate (9) are both made of metal materials.

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