A screw conveyor for a tunneling machine

Abstract

The utility model belongs to the field of shield machine, concretely relates to a kind of spiral conveyer of shield machine, it includes: external cylinder section, main shaft, spiral part, driving motor and discharging device, the external cylinder section has several, several The external cylinder section is connected in turn, the rear end of the external cylinder section of last end is fixedly connected with the driving motor, the main shaft is placed in the inside of the external cylinder section and is connected with the driving motor, the discharging device is installed in the lower portion of the external cylinder section of last end, and with The inside of the external cylinder section is communicated, the outer surface of the main shaft is provided with the spiral part for conveying earth material.This device can convey the earth material broken by shield machine from front end to rear end, and the earth material is broken to prevent clogging, and when the machine stops due to failure, the earth material in the cylinder section can be cleaned by the auxiliary discharging device, to reduce the pressure of the cylinder section.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machines, specifically to a tunnel boring machine screw conveyor. Background Technology

[0002] Tunnel boring machines (TBMs) are key pieces of equipment widely used in tunnel engineering. Their screw conveyors are responsible for the core task of continuously, stably, and controllably discharging the excavated material (a mixture of rock and soil) from the cutterhead from a sealed soil chamber to the outside of the tunnel. The performance of the screw conveyor directly affects the efficiency, safety, and control of surface settlement during TBM construction. Due to the varying sizes of the excavated material, it can sometimes become stuck inside the tunnel section or at the discharge port, necessitating a shutdown for repairs and debris removal.

[0003] Therefore, in order to solve the above-mentioned problems, a screw conveyor for tunnel boring machines is proposed that can prevent blockage of the discharge port and clean up the soil and debris inside the cylinder during a fault shutdown. Utility Model Content

[0004] This utility model addresses the problems mentioned above by specifically designing a tunnel boring machine screw conveyor that can transport the soil material broken up by the tunnel boring machine from the front end to the rear end, and crush the soil material to prevent blockage. At the same time, when the machine stops due to malfunction, the soil material in the cylinder can be cleaned through an auxiliary discharge device to reduce the pressure on the cylinder.

[0005] To achieve the above objectives, this utility model provides a screw conveyor for a tunnel boring machine, comprising: an outer cylindrical section, a main shaft, a screw section, a drive motor, and a feeding device. The outer cylindrical section comprises several segments connected sequentially. The drive motor is fixedly connected to the rear end of the last outer cylindrical section. The main shaft is located inside the outer cylindrical section and connected to the drive motor. The feeding device is installed at the lower part of the last outer cylindrical section and communicates with the interior of the outer cylindrical section. The outer surface of the main shaft is provided with a screw section for conveying soil.

[0006] Furthermore, the feeding device includes a feeding cylinder and a clearing device. The feeding cylinder is located at the lower part of the outer cylinder at the rearmost end, and the clearing device is provided on the feeding cylinder.

[0007] Furthermore, the feeding cylinder includes a crushing section and a feeding section. The crushing section is fixedly connected to the lower part of the outer cylinder section, and the feeding section is fixedly connected to the lower part of the crushing section. The vertical cross-section of the feeding section is a trapezoidal structure, and an inspection door is provided on the feeding section.

[0008] Furthermore, the unblocking device includes: a motor, a rotating shaft, and a crushing blade. The motor is installed on the side of the crushing part, the rotating shaft is placed inside the crushing part and connected to the motor, and a plurality of the crushing blades are provided on the rotating shaft.

[0009] Furthermore, the rotating shaft is provided with two rows of crushing blades, which are inclined and the two rows of crushing blades are inclined in opposite directions.

[0010] Furthermore, it also includes an auxiliary discharge device, which is located at the lower part of the outer cylindrical section in the middle, and its lower end is connected to the discharge device.

[0011] Furthermore, the auxiliary discharge device includes a discharge box and a discharge device. The discharge box is located at the bottom of the outer cylindrical section in the middle and can be opened and closed. One end of the discharge device is connected to the bottom of the discharge box, and the other end is connected to the discharge device.

[0012] Furthermore, the discharge box includes a hydraulic rod, a baffle gate, and an anti-blocking device. The hydraulic rod is installed on the side of the discharge box, and its telescopic end is connected to the baffle gate through a top plate. The baffle gate is slidably connected to the bottom of the discharge box, and the anti-blocking device is rotatably connected inside the discharge box.

[0013] Furthermore, the discharge device includes a discharge channel and a conveyor belt. One end of the discharge channel is connected to the bottom of the discharge box, and the other end is connected to the unloading device. The conveyor belt is located at the bottom of the discharge channel.

[0014] In summary, this utility model has the following advantages and beneficial technical effects: 1. The present invention relates to a material feeding device for a tunnel boring machine screw conveyor, which can crush soil at the feeding port. Through two sets of crushing blades in opposite directions, the soil can be crushed more effectively, preventing the feeding port from being blocked. 2. The present invention relates to a screw conveyor for a tunnel boring machine, which is equipped with an auxiliary discharge device at the cylindrical section. When the machine stops due to a malfunction, the soil at the cylindrical section can be discharged, reducing the pressure inside the cylindrical section and providing a better operating environment for the machine to restart. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a structural schematic diagram of a tunnel boring machine screw conveyor according to the present invention; Figure 2 This is a schematic diagram of the feeding device of this utility model; Figure 3 This is a schematic diagram of the structure of the discharge box of the auxiliary discharge device of this utility model; Figure 4 This is a utility model Figure 1 A magnified view of A in the middle.

[0016] The reference numerals in the attached figures are: 1-Outer cylindrical section; 2-Main shaft; 3-Helical section; 4-Drive motor; 5-Feeding device; 51-Feeding cylinder; 511-Crushing section; 512-Feeding section; 513-Inspection door; 52-Unblocking device; 521-Motor; 522-Rotating shaft; 523-Crushing blade; 6-Auxiliary discharge device; 61-Discharge box; 611-Hydraulic rod; 6111-Top plate; 612-Blocking gate; 613-Anti-blocking device; 62-Discharge device; 621-Discharge channel; 622-Conveyor belt. Detailed Implementation

[0017] The following is in conjunction with the appendix Figures 1-4 The present invention will be further described in detail below. Examples of embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are merely used for descriptive distinction and have no special meaning. All parts and equipment use conventional models found in the prior art, and the circuit connections employ conventional connection methods found in the prior art, which will not be detailed here. Content not described in detail in this specification belongs to prior art known to those skilled in the art.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes: an outer cylindrical section 1, a main shaft 2, a spiral section 3, a drive motor 4, and a feeding device 5. There are several outer cylindrical sections 1, which are connected in sequence by flanges. The rear end of the last outer cylindrical section 1 is fixedly connected to the drive motor 4. The main shaft 2 is placed inside the outer cylindrical section 1 and connected to the drive motor 4. The feeding device 5 is installed at the lower part of the last outer cylindrical section 1 and communicates with the interior of the outer cylindrical section 1. The outer surface of the main shaft 2 is provided with a spiral section 3 for conveying soil.

[0021] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the feeding device 5 includes a feeding cylinder 51 and a clearing device 52. The feeding cylinder 51 is installed at the lower part of the outer cylinder section 1 at the last end by welding. The clearing device is installed on the feeding cylinder 51.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the feeding cylinder 51 includes a crushing section 511 and a feeding section 512. The crushing section 511 is fixedly connected to the lower part of the outer cylinder section 1 by welding and communicates with the interior of the outer cylinder section 1. The feeding section 512 is fixedly connected to the lower part of the crushing section 511 by a flange. The vertical cross-section of the feeding section 512 is a trapezoidal structure, and the lower opening is larger than the upper opening, which is conducive to feeding. An inspection door 513 is provided on the feeding section 512.

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the dredging device 52 includes a motor 521, a rotating shaft 522, and crushing blades 523. The motor 521 is bolted to the side of the crushing section 511. The rotating shaft 522 is located inside the crushing section 511 and connected to the motor 521. Several crushing blades 523 are arranged on the rotating shaft 522. The motor 521 drives the rotating shaft 522 to rotate, and the crushing blades 523 rotate accordingly to crush the soil. Two rows of crushing blades 523 are arranged on the rotating shaft 522. The crushing blades 523 are inclined, and the inclination directions of the two rows of crushing blades 523 are opposite.

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, it also includes an auxiliary discharge device 6, which is located at the lower part of the middle outer cylindrical section 1, and its lower end is connected to the feeding device 5. The auxiliary discharge device 6 includes a discharge box 61 and a discharge device 62. The discharge box 61 is located at the bottom of the middle outer cylindrical section 1 and can be opened and closed. One end of the discharge device 62 is connected to the bottom of the discharge box 61, and the other end is connected to the feeding device 5. Under normal conditions, the discharge box 61 is closed. When the machine is stopped and the soil in the cylindrical section needs to be cleaned, the discharge box 61 is opened, and the soil falls onto the lower discharge device 62, and is then transported by the discharge device 62 to the feeding section 512 of the feeding device 5 for unified discharge.

[0025] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the discharge box 61 includes a hydraulic rod 611, a baffle gate 612, and an anti-blocking device 613. The hydraulic rod 611 is installed on the side of the discharge box 61, and its telescopic end is connected to the baffle gate 612 through a top plate 6111. The baffle gate 612 is slidably connected to the bottom of the discharge box 61, and the anti-blocking device 613 is rotatably connected inside the discharge box 61. The hydraulic rod 611 can drive the movement of the baffle gate 612 by telescoping, thereby controlling the opening and closing of the discharge box 61. The structure of the anti-blocking device 613 is similar to that of the unblocking device 52, both using a motor to drive a rotating shaft to rotate, causing the crushing blades on the shaft to crush the soil, thus preventing blockage.

[0026] The discharge device 62 includes a discharge channel 621 and a conveyor belt 622. One end of the discharge channel 621 is connected to the bottom of the discharge box 61 via a flange, and the other end is connected to the unloading device 5 via a flange. The conveyor belt 622 is located at the bottom of the discharge channel 621. The surface of the conveyor belt 622 is provided with a raised plate-shaped structure, which can better transport the soil. When the baffle gate 612 is opened, the soil falls into the discharge channel 621 through the discharge box 61, and enters the unloading section 512 and is discharged under the transport of the conveyor belt 622.

[0027] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A screw conveyor for a tunnel boring machine, characterized in that, include: The external cylindrical section (1), main shaft (2), spiral section (3), drive motor (4) and feeding device (5) are provided. There are several external cylindrical sections (1), which are connected in sequence. The rear end of the last external cylindrical section (1) is fixedly connected to the drive motor (4). The main shaft (2) is placed inside the external cylindrical section (1) and connected to the drive motor (4). The feeding device (5) is installed at the lower part of the last external cylindrical section (1) and communicates with the interior of the external cylindrical section (1). The outer surface of the main shaft (2) is provided with a spiral section (3) for conveying soil. The feeding device (5) includes a feeding cylinder (51) and a clearing device (52). The feeding cylinder (51) is located at the lower part of the outer cylinder section (1) at the last end, and the clearing device is provided on the feeding cylinder (51). The feeding cylinder (51) includes a crushing section (511) and a feeding section (512). The crushing section (511) is fixedly connected to the lower part of the outer cylinder section (1), and the feeding section (512) is fixedly connected to the lower part of the crushing section (511). The vertical cross-section of the feeding section (512) is a trapezoidal structure, and an inspection door (513) is provided on the feeding section (512). The unblocking device (52) includes: a motor (521), a rotating shaft (522), and a breaker (523). The motor (521) is installed on the side of the breaker section (511). The rotating shaft (522) is placed inside the breaker section (511) and connected to the motor (521). A plurality of the breaker (523) are provided on the rotating shaft (522).

2. The tunnel boring machine screw conveyor according to claim 1, characterized in that, The rotating shaft (522) is provided with two rows of the crushing blades (523), which are inclined and the two rows of the crushing blades (523) are inclined in opposite directions.

3. A tunnel boring machine screw conveyor according to claim 1, characterized in that, It also includes an auxiliary discharge device (6), which is located at the lower part of the outer cylindrical section (1) in the middle, and its lower end is connected to the feeding device (5).

4. A tunnel boring machine screw conveyor according to claim 3, characterized in that, The auxiliary discharge device (6) includes a discharge box (61) and a discharge device (62). The discharge box (61) is located at the bottom of the outer cylindrical section (1) in the middle and can be opened and closed. One end of the discharge device (62) is connected to the bottom of the discharge box (61), and the other end is connected to the feeding device (5).

5. A tunnel boring machine screw conveyor according to claim 4, characterized in that, The discharge box (61) includes a hydraulic rod (611), a baffle gate (612), and an anti-blocking device (613). The hydraulic rod (611) is installed on the side of the discharge box (61), and its telescopic end is connected to the baffle gate (612) through a top plate (6111). The baffle gate (612) is slidably connected to the bottom of the discharge box (61), and the anti-blocking device (613) is rotatably connected to the inside of the discharge box (61).

6. A tunnel boring machine screw conveyor according to claim 4, characterized in that, The discharge device (62) includes a discharge channel (621) and a conveyor belt (622). One end of the discharge channel (621) is connected to the bottom of the discharge box (61), and the other end is connected to the feeding device (5). The conveyor belt (622) is located at the bottom of the discharge channel (621).

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