Small-diameter earth pressure muddy water dual-mode switching shield tunneling machine

Abstract

The utility model discloses a small-diameter earth pressure muddy water dual-mode switching shield tunneling machine, which comprises a front shield, a rear shield and a front shield, the cutterhead is arranged at the front end of the front shield; the first partition plate is arranged in an inner cavity of the front shield; the soil bin is arranged between the cutter head and the first partition plate; the main driving mechanism is arranged in an inner cavity of the front shield and is connected with the cutterhead; the middle shield is arranged behind the front shield; the second partition plate is arranged in an inner cavity of the middle shield; the air cushion bin is arranged between the first partition plate and the second partition plate; the spiral conveyor and the slurry conveying pipe are connected with the soil bin and penetrate through the air cushion bin; the dilution tank is arranged at the output end of the spiral conveyor; and the slurry discharge pipe is connected with the output end of the dilution tank. According to the small-diameter earth pressure muddy water dual-mode switching shield tunneling machine, an earth pressure operation mode and a muddy water operation mode can be integrated in the small-diameter shield tunneling machine, the space utilization rate of the chamber of the shield tunneling machine is increased, and the use requirements of the two modes are met.

Description

Technical Field

[0001] The utility model relates to the technical field of shield equipment, in particular to a small-diameter earth pressure mud water dual-mode switching shield machine. Background Art

[0002] In recent years, the application of multi-mode switchable shield machines has become more and more widespread, especially in composite formations. It is possible that an earth pressure balance shield machine is suitable for a certain section of the tunnel line, but a slurry balance shield machine is suitable for another section. The different geological conditions of different sections in the same section will lead to the use of different forms of shield machines for operation. Some sections are even very short, which may result in multiple replacements of shield machines. In order to reduce construction costs and construction time, earth pressure slurry dual-mode shield machines came into being.

[0003] At present, multi-mode shield machines mainly include earth pressure mud water dual-mode shield machines, earth pressure and open dual-mode shield machines, mud water and open dual-mode shield machines, etc. Among them, the main components of the shield body of the earth pressure mode shield machine are screw conveyors and belt conveyors, which are used to transport slag, while the mud water balance shield machine needs to use an air cushion chamber to balance the pressure in front of the shield body and the soil support surface. That is to say, the earth pressure mud water dual-mode shield machine needs a screw conveyor, a belt conveyor and an air cushion chamber at the same time to meet the requirements of switchable use of the two modes. This means that a multi-mode switching shield machine needs to have two or more shield machine systems, that is, there needs to be enough space in the shield machine chamber to arrange two or more systems. For large-diameter shield machines, due to the large diameter and large space, the components of those systems can also be arranged. However, for small shield machines with a diameter usually below 6 meters, it is difficult to arrange two or more shield machine systems in the shield body due to the limited space inside the shield body. Therefore, there are few small-diameter multi-mode shield machines on the market that can meet the operational needs of multi-mode switching.

[0004] Therefore, how to provide a small-diameter earth pressure mud water dual-mode switchable shield machine, which can integrate the earth pressure operation mode and the mud water operation mode in the small diameter shield machine, improve the space utilization of the shield machine chamber, and meet the use requirements of the two modes has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a small-diameter earth pressure mud water dual-mode switchable shield machine, which can integrate the earth pressure operation mode and the mud water operation mode in the small-diameter shield machine, improve the space utilization rate of the shield machine chamber, and meet the use requirements of the two modes.

[0006] The technical solution provided by the utility model is as follows:

[0007] The utility model provides a small-diameter earth pressure mud water dual-mode switching shield machine, comprising: a front shield; a cutter disc arranged at the front end of the front shield; a first partition plate arranged in the inner cavity of the front shield; a soil bin arranged between the cutter disc and the first partition plate; a main drive mechanism arranged in the inner cavity of the front shield and connected to the cutter disc; a middle shield arranged behind the front shield; a second partition plate arranged in the inner cavity of the middle shield; an air cushion bin arranged between the first partition plate and the second partition plate; a screw conveyor connected to the soil bin and passing through the air cushion bin; a dilution box arranged at the output end of the screw conveyor; and a slurry discharge pipe connected to the output end of the dilution box.

[0008] Furthermore, in a preferred embodiment of the present invention, the small-diameter earth pressure mud water dual-mode switchable shield machine further comprises:

[0009] A valve assembly disposed at the input end of the slurry discharge pipe;

[0010] A slurry discharge pump disposed on the slurry discharge pipe;

[0011] An operating system connected to the valve assembly, slurry discharge pump, screw conveyor and dilution box signal.

[0012] Furthermore, in a preferred embodiment of the present invention, the small-diameter earth pressure mud water dual-mode switchable shield machine further comprises:

[0013] A bracket disposed on the bottom of the inner cavity of the middle shield;

[0014] A segment assembling machine connected to the bracket.

[0015] Furthermore, in a preferred embodiment of the utility model, the segment assembly machine is in an inverted 7-shape and is installed on the bracket.

[0016] Furthermore, in a preferred embodiment of the present invention, the small-diameter earth pressure mud water dual-mode switchable shield machine further comprises:

[0017] A tail shield disposed behind the middle shield;

[0018] A propulsion oil cylinder is arranged on the inner wall of the middle shield.

[0019] Furthermore, in a preferred embodiment of the present invention, the input end of the screw conveyor is arranged at the lower end of the soil bin and is connected to the soil bin;

[0020] The spiral conveyor tube body passes through the second partition plate, and the output end thereof is arranged in the inner cavity of the tail shield.

[0021] Furthermore, in a preferred embodiment of the present invention, a sealing mechanism is provided at the cross connection between the screw conveyor and the second partition plate.

[0022] Furthermore, in a preferred embodiment of the present invention, the small-diameter earth pressure mud water dual-mode switchable shield machine further comprises:

[0023] A human cabin is arranged in the air cushion chamber.

[0024] Furthermore, in a preferred embodiment of the present invention, the man cabin is a split man cabin;

[0025] The door of the split-type cabin is arranged on the second partition.

[0026] Furthermore, in a preferred embodiment of the present invention, the small-diameter earth pressure mud water dual-mode switchable shield machine further comprises:

[0027] A cover plate is disposed on the second partition plate.

[0028] The utility model provides a small-diameter earth pressure mud water dual-mode switching shield machine, comprising: a front shield; a cutter disc arranged at the front end of the front shield; a first partition plate arranged in the inner cavity of the front shield; a soil bin arranged between the cutter disc and the first partition plate; a main drive mechanism arranged in the inner cavity of the front shield and connected to the cutter disc; a middle shield arranged behind the front shield; a second partition plate arranged in the inner cavity of the middle shield; an air cushion bin arranged between the first partition plate and the second partition plate; a screw conveyor connected to the soil bin and passing through the air cushion bin; a dilution box arranged at the output end of the screw conveyor; and a slurry discharge pipe connected to the output end of the dilution box. In the small-diameter earth pressure mud water dual-mode switching shield machine, its main structure is composed of the front shield, the cutter disc, the first partition, the soil bin, the main drive mechanism, the middle shield, the second partition, the air cushion bin, the screw conveyor and the dilution box; wherein, the shield body of the shield machine includes the front shield, the middle shield and the tail shield, the cutter disc is installed on the front shield, and the main drive mechanism provides power for excavation operations; secondly, after the screw conveyor of the traditional earth pressure balance shield machine discharges slag, the slag is usually discharged onto the belt conveyor, which is transported to the rear by the belt conveyor and then transported to the outside of the tunnel by the slag truck. In the technical solution provided by the utility model, in order to enable the slag to be transported like mud, the screw conveyor is used as the conveying channel for the slag, and it is also the conveying channel for the mud, that is, the slag and the mud are both transported to the outside of the tunnel by means of a mud pipe. For this purpose, the dilution box is arranged at the output end of the screw conveyor. The output end is connected to the slurry discharge pipe, and the slag is flushed by high-pressure water to form mud. The mud is discharged by the slurry discharge pipe, which greatly solves the problem of insufficient inner cavity space of small-diameter shield machines and the inability to integrate earth pressure mode and mud and water mode operations; and, since the air cushion bin of a traditional shield machine is small in size, the air cushion bin can be filled with mud and water in a short time, resulting in frequent adjustment and control time. The small-diameter earth pressure and mud water dual-mode switching shield machine described in the utility model is provided with the first partition and the second partition, and the chamber in the shield body of the shield machine is separated from the beginning to the end by the first partition and the second partition in sequence. The first partition is provided, and the chamber between the cutter disc and the first partition is provided as the earth bin. The second partition is provided, and the chamber between the first partition and the second partition is provided as the air cushion bin, thereby increasing the volume of the air cushion bin and facilitating the adjustment and control of the mud and water pressure. Therefore, compared with the prior art, the technical solution provided by the utility model can integrate the earth pressure operation mode and the mud water operation mode in a small diameter shield machine, improve the space utilization rate of the shield machine chamber, and meet the use requirements of the two modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of the small-diameter earth pressure mud water dual-mode switchable shield machine provided in an embodiment of the utility model;

[0031] Figure 2 A schematic diagram of the positions of the soil bin and the air cushion bin provided in an embodiment of the utility model;

[0032] Figure 3 A schematic structural diagram of the inner cavity cross section of the front shield provided in an embodiment of the utility model;

[0033] Figure 4 This is a schematic structural diagram of the inner cavity cross section of the middle shield provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solutions in the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with 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 of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0035] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set 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 indirectly connected to the other element.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "first", "second", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 cannot be understood as a limitation on the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0038] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present utility model can be implemented, so they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present utility model without affecting the effects and purposes that can be achieved by the present utility model.

[0039] like Figures 1 to 4 As shown, the small-diameter earth pressure mud water dual-mode switchable shield machine provided by the embodiment of the utility model includes: a front shield 1, a cutter head 2, a first partition 3, a soil bin 4, a main drive mechanism 5, a middle shield 6, a second partition 7, an air cushion bin 8, a screw conveyor 9, a dilution box 10 and a slurry discharge pipe 11.

[0040] The utility model provides a small-diameter earth pressure mud water dual-mode switchable shield machine, specifically comprising: a front shield 1; a cutter head 2 arranged at the front end of the front shield 1; a first partition 3 arranged in the inner cavity of the front shield 1; a soil bin 4 arranged between the cutter head 2 and the first partition 3; a main drive mechanism 5 arranged in the inner cavity of the front shield 1 and connected to the cutter head 2; a middle shield 6 arranged behind the front shield 1; a second partition 7 arranged in the inner cavity of the middle shield 6; an air cushion bin 8 arranged between the first partition 3 and the second partition 7; a screw conveyor 9 connected to the soil bin 4 and passing through the air cushion bin 8; a dilution box 10 arranged at the output end of the screw conveyor 9; and a slurry discharge pipe 11 connected to the output end of the dilution box 10. Compared with the prior art, the technical solution provided by the utility model can integrate the earth pressure operation mode and the mud water operation mode in a small-diameter shield machine, improve the space utilization rate of the shield machine chamber, and meet the use requirements of the two modes.

[0041] The technical solution of the utility model is described in detail below in conjunction with specific embodiments:

[0042] Specifically, in a specific embodiment of the utility model, the small-diameter earth pressure mud water dual-mode switching shield machine also includes: a valve assembly 12 arranged at the output end of the dilution box 10; a slurry discharge pump arranged on the slurry discharge pipe 11; and an operating system connected to the valve assembly 12, the slurry discharge pump, the screw conveyor 9 and the dilution box 10 by signal.

[0043] Among them, in an embodiment of the utility model, the operating system is used to control the mud and slag transportation operation of the small-diameter earth pressure mud water dual-mode switching shield machine; when the shield machine excavates into the slag layer or mud layer, the excavated slag or mud is stored in the soil bin 4, and the operating system starts the screw conveyor 9 and the dilution box 10, and opens the valve assembly 12 and the slurry pump. Through the screw conveyor 9, the slag or mud is transported to the dilution box 10, and the mud directly passes through the dilution box 10. When the slag passes through the dilution box 10, the high-pressure water will flush the slag, convert the slag into mud, and finally be discharged from the slurry pipe 11.

[0044] Specifically, in a specific embodiment of the present invention, the first partition plate 3 is a front shield 1 partition plate, and the second partition plate 7 is a middle shield partition plate.

[0045] Specifically, in a specific embodiment of the utility model, the small-diameter earth pressure mud water dual-mode switchable shield machine also includes: a bracket 13 arranged on the bottom of the inner cavity of the middle shield 6; a segment assembler 14 connected to the bracket 13; the segment assembler 14 is in an inverted 7 shape and is installed on the bracket 13.

[0046] Among them, in an embodiment of the utility model, the bracket 13 is arranged at the bottom of the inner cavity of the middle shield 6, and the segment assembler 14 is installed on the bracket 13. When the small-diameter earth pressure mud water dual-mode switching shield machine performs tunnel excavation operations, the segment assembler 14 is used to assemble the segments on the inner wall of the tunnel so that they are used for tunnel support.

[0047] Specifically, in a specific embodiment of the utility model, the small-diameter earth pressure mud water dual-mode switchable shield machine further includes: a tail shield 15 arranged behind the middle shield 6; and a propulsion cylinder 16 arranged on the inner wall of the middle shield 6.

[0048] In the embodiment of the present utility model, the thrust cylinder 16 is arranged on the inner wall of the middle shield 6 to provide forward excavation force to the shield machine.

[0049] Specifically, in a specific embodiment of the present utility model, the input end of the screw conveyor 9 is arranged at the lower end of the soil bin 4 and is connected to the soil bin 4; the tube body of the screw conveyor 9 passes through the second partition plate 7, and the output end thereof is arranged in the inner cavity of the tail shield 15.

[0050] Among them, the traditional slurry balance shield machine discharges slag through a mud pipe, which is a commonly used earth pressure mud water dual-mode shield machine. It has a screw conveyor 9 plus a belt conveyor to transport slag, that is, the earth pressure mode, and a mud pipe is used to transport mud, also known as the mud water mode; and due to the limited space of the small-diameter shield machine, in the embodiment of the utility model, only one channel is set for slag discharge, that is, the screw conveyor 9 is set to carry out the transportation operation of slag mud, which greatly saves space.

[0051] Specifically, in a specific embodiment of the present utility model, a sealing mechanism is provided at the cross connection between the screw conveyor 9 and the second partition plate 7 .

[0052] Among them, the screw conveyor 9 serves as the only slag or mud conveying channel of the small-diameter earth pressure mud water dual-mode switching shield machine, and is arranged in the shield body of the shield machine at a certain angle; the input end of the screw conveyor 9 faces downward and is connected to the bottom of the soil bin 4, while the output end of the screw conveyor 9 faces upward, and its output end extends to the inner cavity of the tail shield 15; and the tube body of the screw conveyor 9 will pass through the middle shield partition on the middle shield 6. In this embodiment, the sealing mechanism is arranged at the intersection of the screw conveyor 9 and the middle shield partition, and the intersection is sealed by the sealing mechanism to prevent pressure leakage.

[0053] Specifically, in a specific embodiment of the present utility model, the small-diameter earth pressure mud water dual-mode switchable shield machine further includes: a man cabin arranged in the air cushion chamber 8.

[0054] Among them, in the embodiment of the utility model, since the chambers between the first partition plate 3 and the second partition plate 7 are both configured as the air cushion chamber 8, the volume of the air cushion chamber 8 is large enough; therefore, in this embodiment, the human cabin can be arranged in the air cushion chamber 8 and installed on the middle shield partition, so that it can provide a transition channel for people to adapt to the high-pressure environment in the front before entering the shield body space.

[0055] Specifically, in a specific embodiment of the present utility model, the man cabin is a split man cabin 17 ; the door of the split man cabin 17 is arranged on the second partition plate 7 .

[0056] To be more specific, in a traditional shield machine, due to space constraints, the man cabin is usually configured as an integrated man cabin. The integrated man cabin must be manufactured in accordance with the standards of a high-pressure vessel during the shield manufacturing process, which greatly increases the manufacturing difficulty and cost. In the present embodiment, since the space in which the man cabin can be installed is large, the man cabin adopts the split man cabin 17, which greatly reduces the manufacturing difficulty and reduces the manufacturing cost.

[0057] In a specific embodiment of the utility model, the small-diameter earth pressure mud water dual-mode switching shield machine further includes: a cover plate 18 arranged on the second partition plate 7. In a traditional shield machine, the segment assembly machine 14 is installed on the H-shaped bracket of the middle shield 6; in the embodiment of the utility model, the H-shaped bracket is cancelled on the middle shield 6, and the cover plate 18 is arranged on the middle shield partition plate instead, which can effectively save space.

[0058] As described above, the small-diameter earth pressure and mud water dual-mode switchable shield machine provided by the embodiment of the utility model can solve the problem that small-diameter shield machines, usually shield machines with a diameter of less than 6 meters, cannot meet the integrated use of earth pressure operation mode and mud water operation mode. In the small-diameter earth pressure mud water dual-mode switching shield machine, its main structure is composed of the front shield 1, the cutter head 2, the first partition 3, the soil bin 4, the main drive mechanism 5, the middle shield 6, the second partition 7, the air cushion bin 8, the screw conveyor 9 and the dilution box 10; wherein, the shield body of the shield machine includes the front shield 1, the middle shield 6 and the tail shield 15, the cutter head 2 is installed on the front shield 1, and the main drive mechanism 5 provides power for excavation operations; secondly, after the screw conveyor 9 of the traditional earth pressure balance shield machine discharges slag, the slag is usually discharged onto the belt conveyor, which is transported to the rear by the belt conveyor and then transported to the outside of the cave by the slag truck. In the technical solution provided by the utility model, in order to enable the slag to be transported like mud, the screw conveyor 9 is used as the conveying channel for the slag, and it is also the conveying channel for the mud, that is, the slag and the mud are both transported to the outside of the cave by the mud pipe. For this reason, the dilution box 10 is arranged at the output end of the screw conveyor 9, and the dilution box 1 The output end of 0 is connected to the slurry discharge pipe 11, and the slag is flushed by high-pressure water to form mud. The mud is discharged by the slurry discharge pipe 11, which greatly solves the problem that the inner cavity space of the small-diameter shield machine is insufficient and the earth pressure mode and mud-water mode cannot be integrated. In addition, since the air cushion chamber 8 of the traditional shield machine is small in size, the air cushion chamber 8 can be filled with mud and water in a short time, resulting in frequent adjustment and control time. The small-diameter earth pressure and mud-water dual-mode switching shield machine described in the utility model is provided with the first baffle 3 and the second baffle 7. The chamber in the shield body of the shield machine is separated from the first baffle 3 and the second baffle 7 from beginning to end. The first baffle 3 is provided, and the chamber between the cutter head 2 and the first baffle 3 is provided as the earth bin 4. The second baffle 7 is provided, and the chamber between the first baffle 3 and the second baffle 7 is provided as the air cushion chamber 8. The volume of the air cushion chamber 8 is also increased, which facilitates the adjustment of mud and water pressure. It can be seen that the technical solution provided by the utility model, compared with the prior art, can integrate the earth pressure operation mode and the mud water operation mode in a small-diameter shield machine, improve the space utilization rate of the shield machine chamber, and meet the use requirements of the two modes.

[0059] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A small-diameter earth pressure mud water dual-mode switchable shield machine, characterized in that: include: front shield; A knife disc disposed at the front end of the front shield; a first baffle disposed in the inner cavity of the front shield; A soil bin disposed between the cutter head and the first partition plate; A main drive mechanism disposed in the inner cavity of the front shield and connected to the cutter head; A middle shield disposed behind the front shield; A second partition disposed in the inner cavity of the middle shield; An air cushion chamber disposed between the first baffle and the second baffle; A screw conveyor connected to the soil bin and passing through the air cushion bin; A dilution box disposed at the output end of the screw conveyor; A slurry discharge pipe connected to the output end of the dilution box; The small-diameter earth pressure mud water dual-mode switching shield machine also includes: A bracket disposed on the bottom of the inner cavity of the middle shield; A pipe segment assembling machine connected to the bracket; the pipe segment assembling machine is in an inverted "7" shape and is installed on the bracket.

2. The small-diameter earth pressure mud water dual-mode switchable shield machine according to claim 1 is characterized in that: The small-diameter earth pressure mud water dual-mode switching shield machine also includes: A valve assembly disposed at the input end of the slurry discharge pipe; A slurry discharge pump disposed on the slurry discharge pipe; An operating system connected to the valve assembly, slurry discharge pump, screw conveyor and dilution box signal.

3. The small-diameter earth pressure mud water dual-mode switchable shield machine according to claim 1 is characterized in that: The small-diameter earth pressure mud water dual-mode switching shield machine also includes: A tail shield disposed behind the middle shield; A propulsion oil cylinder is arranged on the inner wall of the middle shield.

4. The small-diameter earth pressure mud water dual-mode switchable shield machine according to claim 3 is characterized in that: The input end of the screw conveyor is arranged at the lower end of the soil bin and is communicated with the soil bin; The spiral conveyor tube body passes through the second partition plate, and the output end thereof is arranged in the inner cavity of the tail shield.

5. According to claim 4, the small-diameter earth pressure mud water dual-mode switchable shield machine is characterized in that: A sealing mechanism is provided at the cross connection between the screw conveyor and the second partition plate.

6. The small-diameter earth pressure mud water dual-mode switchable shield machine according to claim 1, characterized in that: The small-diameter earth pressure mud water dual-mode switching shield machine also includes: A human cabin is arranged in the air cushion chamber.

7. The small-diameter earth pressure mud water dual-mode switchable shield machine according to claim 6, characterized in that: The man cabin is a split man cabin; The door of the split-type cabin is arranged on the second partition.

8. The small-diameter earth pressure mud water dual-mode switchable shield machine according to claim 1, characterized in that: The small-diameter earth pressure mud water dual-mode switching shield machine also includes: A cover plate is disposed on the second partition plate.

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