Cutterhead center stirring device and shield tunneling machine

Abstract

The invention relates to the technical field of tunneling equipment, in particular to a cutterhead center stirring device and a shield tunneling machine.The cutterhead center stirring device comprises a stirring mechanism and a transmission mechanism, the stirring mechanism comprises a bearing seat and a stirring arm, the bearing seat is arranged on a soil bin partition plate, and the stirring arm is arranged on the bearing seat; the stirring arm is rotatably arranged on an inner ring of the bearing seat; the transmission mechanism comprises a rotation center, a large gear, a connecting shaft and a small gear, the large gear is arranged on the rotation center, the connecting shaft is arranged on the soil bin partition plate, and the small gear is connected with the end of the stirring arm and meshed with the large gear. The transmission mechanism is connected with the stirring mechanism and the cutterhead rotating center, so that the stirring mechanism can be driven by power of the cutterhead rotating center, and residue soil in a soil bin can be fully stirred synchronously in the tunneling process.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel excavation equipment, and in particular to a cutter head central stirring device and a shield machine. Background Art

[0002] During the tunneling process, the cutterhead of the shield machine rotates continuously, and the thrust cylinder pushes the shield machine forward to excavate the soil. The soil crushed by the cutter fills the soil bin, and then the soil is discharged through the screw conveyor and belt conveyor. However, since the rotation center of the cutterhead is in a relatively fixed central position, the soil is very likely to form a mud cake here and adhere to it for a long time, and even the intensity and range continue to increase, seriously interfering with the flow of soil.

[0003] At present, there are two main technical solutions for reducing soil bin mud cake:

[0004] The first is to stir the soil in the soil bin through the stirring arm to increase the fluidity of the soil and reduce the risk of mud cake.

[0005] The second is to inject foam, bentonite and other soil conditioners into the soil bin to improve the performance of the soil and prevent the soil from forming mud cakes.

[0006] The appearance of mud cakes will cause the torque of the cutter head to increase rapidly, and in severe cases, even cause the cutter head to get stuck, which greatly reduces the construction efficiency. Sometimes manual cleaning is required, which brings many hidden dangers to shield construction and endangers the safety of workers. Therefore, it is necessary to develop an efficient stirring device to prevent mud cakes.

[0007] In order to ensure the mixing area and achieve sufficient mixing of the slag, the existing mixing device needs to set up a power source in the soil bin and adopt a large-volume mixing structure, which occupies a large amount of soil bin space, thereby affecting the slag discharge efficiency. Reducing the volume of the mixing structure will lead to insufficient mixing of the slag.

[0008] In summary, there is an urgent need for a cutterhead central stirring device and a shield machine to solve the problems existing in the prior art. Summary of the invention

[0009] The object of the present invention is to provide a cutter head central stirring device and a shield machine, and the specific technical scheme is as follows:

[0010] A knife disc center stirring device comprises a stirring mechanism and a transmission mechanism.

[0011] The stirring mechanism comprises a bearing seat and a stirring arm, wherein the bearing seat is arranged on the soil bin partition, and the stirring arm is rotatably arranged on the inner ring of the bearing seat;

[0012] The transmission mechanism includes a rotation center, a large gear, a connecting shaft and a small gear. The large gear is arranged on the rotation center, the connecting shaft is arranged on the soil bin partition, and the small gear is connected to the end of the stirring arm and meshes with the large gear.

[0013] Preferably, the stirring mechanism further comprises a stirring bar, and the stirring bar is arranged on the end surface of the stirring arm close to the blade disc.

[0014] Preferably, the stirring bar is detachably arranged on the stirring arm.

[0015] Preferably, the stirring bar is provided with at least four ribs for cleaning the blade disc.

[0016] Preferably, a flushing channel is provided inside the stirring arm, and the flushing channel includes a water outlet arranged to align with the cutter disc.

[0017] Preferably, the large gear is detachably arranged on the rotation center, and the small gear is detachably connected to the stirring arm.

[0018] In addition, the present invention also includes a shield machine, including a cutter head and the stirring device at the center of the cutter head as described above.

[0019] The application of the technical solution of the present invention has the following beneficial effects:

[0020] The present invention connects the stirring mechanism and the rotation center of the cutter disc through a transmission mechanism, so that the power of the rotation center of the cutter disc can drive the stirring mechanism, and realize the synchronous and sufficient stirring of the slag in the soil bin during the excavation process. The present invention solves the problem of slag accumulation in the soil bin, and realizes the sufficient stirring of the slag during the excavation process. Compared with the prior art, the device of the present invention drives the stirring mechanism through the power of the rotation center of the cutter disc, saves the internal space of the soil bin, saves costs and energy consumption, and the device of the present invention has a simple structure and is easy to maintain.

[0021] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 It is a structural schematic diagram of a knife disc center stirring device in a preferred embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of a large gear and a small gear in a preferred embodiment of the present invention;

[0025] Figure 3 It is a schematic structural diagram of a shield machine (a portion where a stirring device at the center of the cutterhead is installed) in a preferred embodiment of the present invention.

[0026] Among them, 1-stirring mechanism, 1.1-bearing seat, 1.2-stirring arm, 1.3-stirring bar, 2-transmission mechanism, 2.1-rotation center, 2.2-large gear, 2.3-connecting shaft, 2.4-small gear, 3-soil bin partition, 4-flushing channel, 5-first screw, 6-second screw, 7-third screw. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0028] Embodiment 1:

[0029] See also Figure 1 This embodiment discloses a blade center stirring device, including a stirring mechanism 1 and a transmission mechanism 2.

[0030] The stirring mechanism 1 comprises a bearing seat 1.1 and a stirring arm 1.2, wherein the bearing seat 1.1 is arranged on the soil bin partition 3, and the stirring arm 1.2 is rotatably arranged on the inner ring of the bearing seat 1.1;

[0031] The transmission mechanism 2 includes a rotation center 2.1, a large gear 2.2, a connecting shaft 2.3 and a small gear 2.4. The large gear 2.2 is arranged on the rotation center 2.1, the connecting shaft 2.3 is rotatably arranged on the soil bin partition 3, and the small gear 2.4 is connected to the end of the stirring arm 1.2 and meshes with the large gear 2.2.

[0032] It should be noted that the rotation center 2.1 is connected to the rotation center of the cutter disc. The rotation of the rotation center of the cutter disc drives the large gear 2.2 to rotate, and the small gear 2.4 engaged with the large gear 2.2 rotates accordingly, thereby driving the stirring arm 1.2. The stirring arm 1.2 rotates to stir the slag, and the slag is transported to the ground along with the slag discharge system.

[0033] The blade center stirring device disclosed in this embodiment has the following advantages:

[0034] This embodiment connects the stirring mechanism and the rotation center of the cutter disc through a transmission mechanism, so that the power of the rotation center of the cutter disc can drive the stirring mechanism, and realize the synchronous and sufficient stirring of the slag in the soil bin during the excavation process. This embodiment solves the problem of slag accumulation in the soil bin, and realizes the sufficient stirring of the slag during the excavation process. Compared with the prior art, the device of this embodiment drives the stirring mechanism through the power of the rotation center of the cutter disc, saves the internal space of the soil bin, saves costs and energy consumption, and the device of the present invention has a simple structure and is easy to maintain.

[0035] In a specific implementation case, the stirring mechanism 1 also includes a stirring bar 1.3, which is arranged on the end surface of the stirring arm 1.2 close to the cutter disc. The stirring bar 1.3 can expand the stirring area of ​​the stirring arm 1.2 inside the soil bin, thereby further fully stirring the debris in the soil bin and preventing the debris from adhering to the rotation center of the cutter disc.

[0036] In a specific implementation case, the stirring bar 1.3 is detachably arranged on the stirring arm 1.2. Specifically, the stirring arm 1.2 is provided with a first mounting hole for mounting the stirring bar 1.3, and the stirring bar 1.3 is provided with a first through hole corresponding to the first mounting hole. The stirring bar 1.3 is detachably arranged on the stirring arm 1.2 by a first screw 5. The first screw 5 passes through the first through hole and connects the first mounting hole to fix the stirring bar 1.3 on the stirring arm 1.2. This embodiment can replace stirring bars 1.3 of different sizes according to the requirements of different soil bins to ensure that the stirring arm 1.2 and the stirring bar 1.3 can fully stir the slag in the soil bin.

[0037] In a specific implementation case, the stirring bar 1.3 is provided with at least four ribs for cleaning the cutter disc. In this embodiment, the ribs are symmetrically distributed in pairs on the front and rear sides of the stirring bar 1.3. The ribs in this embodiment are used to increase the stirring area of ​​the stirring bar 1.3 along the excavation direction of the cutter disc. This embodiment can also adopt various forms of rib combinations as needed, and various different combinations can be achieved by increasing the number of ribs and changing their positions.

[0038] In a specific implementation case, a flushing channel 4 is provided inside the stirring arm 1.2, and the flushing channel 4 includes a water outlet arranged for the cutter disc. In this embodiment, the flushing channel 4 is located at the rotation center of the stirring arm 1.2 to prevent the rotation of the stirring arm 1.2 from affecting the water outlet of the flushing channel 4. The water source of the flushing channel 4 can be an existing water storage mechanism in the shield machine, and the water outlet mechanism is an existing structure of the shield machine, which will not be described in detail. In addition, in this embodiment, a slag conditioner can be added into the soil bin through the flushing channel 4 to further improve the properties of the slag, making it difficult for the slag to adhere to the cutter disc, and the slag can be fully stirred with the stirring arm 1.2 and smoothly discharged from the soil bin.

[0039] In a specific implementation case, the large gear 2.2 is detachably arranged on the rotation center 2.1, and the small gear 2.4 is detachably connected to the stirring arm 1.2. In this embodiment, a plurality of second through holes are provided on the inner ring of the large gear 2.2, a second mounting hole is provided on the rotation center 2.1, and the large gear 2.2 is detachably arranged on the rotation center 2.1 by a second screw 6, and the second screw 6 passes through the second through hole and is connected to the second mounting hole, so that the large gear 2.2 is fixed to the rotation center 2.1; a plurality of third through holes are provided on the inner ring of the small gear 2.4, and a third mounting hole is provided on the stirring arm 1.2, and the small gear 2.4 is detachably connected to the stirring arm 1.2 by a third screw 7, and the third screw 7 passes through the third through hole and is connected to the third mounting hole, so that the small gear 2.4 is fixed to the rotation center.

[0040] It should be noted that if Figure 2 As shown, this embodiment can realize gear combinations of different sizes through the detachable small gear 2.4 and the large gear 2.2. The rotation speed of the stirring arm 1.2 can be adjusted by adjusting the sizes of the large gear 2.2 and the small gear 2.4, thereby improving the applicability of the stirring device of this embodiment.

[0041] Embodiment 2:

[0042] like Figure 3 As shown, this embodiment discloses a shield machine, including a cutter disc and a stirring device at the center of the cutter disc as in Example 1. In the cutter disc center stirring device in this embodiment, only part of the stirring arm 1.2 and the stirring bar 1.3 are located in the soil bin, and the stirring 1.2 is driven by the rotation center of the cutter disc, occupying a small space in the soil bin. Through the detachable stirring bar 1.3, large gear 2.2 and small gear 2.4, this embodiment can adjust the stirring area and rotation speed of the stirring rod 1.2 in the stirring device according to the needs of the shield machine.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A knife disc central stirring device, characterized in that: It comprises a stirring mechanism (1) and a transmission mechanism (2). The stirring mechanism (1) comprises a bearing seat (1.1) and a stirring arm (1.2); the bearing seat (1.1) is arranged on a soil bin partition (3); and the stirring arm (1.2) is rotatably arranged on an inner ring of the bearing seat (1.1); The transmission mechanism (2) comprises a rotation center (2.1), a large gear (2.2), a connecting shaft (2.3) and a small gear (2.4); the large gear (2.2) is arranged on the rotation center (2.1), the connecting shaft (2.3) is arranged on the soil bin partition (3), and the small gear (2.4) is connected to the end of the stirring arm (1.2) and meshes with the large gear (2.2).

2. The blade center stirring device according to claim 1, characterized in that: The stirring mechanism (1) further comprises a stirring bar (1.3), wherein the stirring bar (1.3) is arranged on the end surface of the stirring arm (1.2) close to the blade disc.

3. The blade center stirring device according to claim 2, characterized in that: The stirring bar (1.3) is detachably arranged on the stirring arm (1.2).

4. The blade center stirring device according to claim 2, characterized in that: The stirring bar (1.3) is provided with at least four ribs for cleaning the blade disc.

5. The blade center stirring device according to claim 1, characterized in that: A flushing channel (4) is provided inside the stirring arm (1.2), and the flushing channel (4) comprises a water outlet arranged in alignment with the cutter disc.

6. The blade center stirring device according to claim 1, characterized in that: The large gear (2.2) is detachably arranged on the rotation center (2.1), and the small gear (2.4) is detachably connected to the stirring arm (1.2).

7. A shield machine, characterized in that: It comprises a blade disc and a stirring device in the center of the blade disc as described in any one of claims 1-6.

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