A wedge-shaped shield head structure

Abstract

The utility model relates to a wedge shield head structure belongs to underground excavation equipment technical field. The structure includes rotary shield body, wedge shield body, small cutting head, big cutting head, middle cabin cylinder, compartment board, rear squirrel cage frame, broken stick, front squirrel cage frame and tool rest, the rotary shield body and wedge shield body constitute shield head shell together, wherein the wedge shield body does not rotate, the rotary shield body can rotate, and the rotary shield body front section is equipped with the chamfer. The utility model discloses through the cooperation of wedge shield body and rotary shield body, and the design of the small cutting head and the middle big cutting head of ladder arrangement, has realized stable cutting, has reduced the disturbance to surrounding soil body, and the squirrel cage type breaking device adapts to different soil quality, and the versatility of equipment has been improved, and compared with prior art has the remarkable progress.

Description

Technical Field

[0001] This utility model belongs to the technical field of underground excavation equipment, specifically relating to a wedge-shaped shield head structure. Background Technology

[0002] In current underground excavation processes, when excavating close to the surface, existing excavation technologies primarily employ flat-head advance, using a face-to-face tunneling method with the excavation direction forward. Because the shield head of existing equipment needs to rotate and is large in size, the cutting force balance is poor, resulting in significant impact on the soil layer during excavation and causing considerable disturbance. This can negatively impact above-ground buildings and facilities, potentially causing damage. Therefore, there is an urgent need for an excavation device that can reduce soil disturbance and improve cutting stability. Utility Model Content

[0003] The purpose of this invention is to provide a wedge-shaped shield head structure to solve the above-mentioned problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A wedge-shaped shield head structure includes a rotating shield body, a wedge-shaped shield body, a small cutting head, a large cutting head, an intermediate chamber, a bulkhead, a rear rat cage frame, a crushing rod, a front rat cage frame, and a blade holder; the rotating shield body and the wedge-shaped shield body together constitute the shield head shell, wherein the wedge-shaped shield body does not rotate, the rotating shield body can rotate, and the front section of the rotating shield body is provided with a chamfer. The cutter holder is mounted on the inclined surface of the wedge-shaped shield. Small cutting heads are mounted on the cutter holder and can rotate on their own. They are arranged symmetrically in pairs along the circumference and distributed in a stepped manner in the axial direction. The large cutting head is located at the center of the device and can rotate around the central axis. Crushing rollers are installed on the front and rear cage frames, which together form the crushing chamber. The partition plate is located behind the crushing chamber and has a notch at its lower end. The intermediate chamber is the intermediate transmission part of the device and is used to connect power and other pipelines.

[0005] Furthermore, the wedge-shaped shield adopts a biomimetic mosquito mouthpart structure design, and its inclined surface is used to arrange the tool holder to increase the cutting surface.

[0006] Furthermore, the cage-type crushing device composed of the front cage frame and the rear cage frame can crush hard rocks to adapt to different soil types.

[0007] Furthermore, the partition plate is used to isolate the soil being cut, and the notch at its lower end is used to transport the soil being cut.

[0008] The beneficial effects of this utility model are as follows: This invention achieves stable cutting and reduces disturbance to the surrounding soil through the combination of a wedge-shaped and rotating shield, and a stepped arrangement of small cutting heads and a large central cutting head. The cage-type crusher adapts to different soil types, improving the equipment's versatility. The partition plate design enables effective transport of the cut soil while simultaneously creating pressure balance, further ensuring the stability of the excavation process. This device is particularly suitable for scenarios with complex ground structures, effectively reducing the impact of excavation on the ground.

[0009] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the wedge-shaped shield head structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of a wedge-shaped shield head structure according to an embodiment of the present invention.

[0011] Explanation of the symbols in the attached diagram: 1. Rotating shield; 2. Wedge-shaped shield; 3. Small cutting head; 4. Large cutting head; 5. Intermediate chamber; 6. Divider plate; 7. Rear cage frame; 8. Crushing roller; 9. Front cage frame; 10. Tool holder. Detailed Implementation

[0012] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0013] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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.

[0014] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0015] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0016] Please see Figure 1 The wedge-shaped shield head structure shown in a preferred embodiment of this application includes a rotating shield body 1, a wedge-shaped shield body 2, a small cutting head 3, a large cutting head 4, an intermediate chamber 5, a partition plate 6, a rear rat cage frame 7, a crushing rod 8, a front rat cage frame 9, and a knife holder 10.

[0017] In terms of structural connection, the rotating shield 1 and the wedge-shaped shield 2 are spliced ​​together to form the shield head shell. The rotating shield 1 can rotate around the central axis, and the chamfered structure at its front end rolls against the outer wall of the tunnel during the rotation. The wedge-shaped shield 2 is fixed, and a cutter holder 10 is welded to its inclined surface. The small cutting head 3 is mounted on the cutter holder 10 through bearings and can rotate freely. Every two small cutting heads 3 are arranged symmetrically in the circumferential direction and are staggered from top to bottom in the axial direction in a stepped distribution.

[0018] The large cutting head 4 is connected to the power unit via a drive shaft, is located at the center of the device, and can rotate around the central axis. Its position is inside the circumference formed by the small cutting head 3.

[0019] The front cage frame 9 and the rear cage frame 7 are fixed at the rear of the device, and multiple crushing rollers 8 are installed between them. The crushing rollers 8 can rotate around their own axis and together form the crushing chamber.

[0020] The bulkhead 6 is vertically installed behind the crushing chamber and connected to the intermediate chamber 5. The notch at the lower end of the bulkhead 6 is connected to the rear conveying device.

[0021] The intermediate chamber 5 runs through the middle of the device and contains power transmission pipelines, hydraulic pipelines, etc., to connect various components with external equipment.

[0022] During operation, the shield head moves forward as a whole under the action of the rear propulsion device, the cutter head 10 remains fixed, and the small cutting head 3 rotates on its own. Due to its stepped arrangement, it first cuts the upper soil layer and then gradually contacts and cuts downwards, which improves the stability of the cutting process. The wedge-shaped shield 2 moves forward as a whole and forms support for the cut area along the slope. Then the large cutting head 4 rotates and cuts the middle soil. Since the surrounding soil has been cut and isolated by the small cutting head 3, the disturbance to the surrounding area is reduced.

[0023] The cut soil enters the rear crushing chamber and is broken up by the crushing roller 8. A pressure chamber is formed in front of the partition plate 6, which balances the pressure with the cut soil in front. The broken soil enters the conveying device through the notch at the bottom of the partition plate 6 and is eventually transported out.

[0024] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0025] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A wedge-shaped chape structure, characterized by, It includes a rotating shield body, a wedge-shaped shield body, a small cutting head, a large cutting head, an intermediate chamber, a bulkhead, a rear rat cage frame, a crushing rod, a front rat cage frame, and a blade holder; the rotating shield body and the wedge-shaped shield body together constitute the shield head shell, wherein the wedge-shaped shield body does not rotate, the rotating shield body can rotate, and the front section of the rotating shield body is provided with a chamfer. The cutter holder is mounted on the inclined surface of the wedge-shaped shield. Small cutting heads are mounted on the cutter holder and can rotate on their own. They are arranged symmetrically in pairs along the circumference and distributed in a stepped manner in the axial direction. The large cutting head is located at the center of the device and can rotate around the central axis. Crushing rollers are installed on the front and rear cage frames, which together form the crushing chamber. The partition plate is located behind the crushing chamber and has a notch at its lower end. The intermediate chamber is the intermediate transmission part of the device and is used to connect the power supply and pipelines.

2. The wedge-shaped chape structure of claim 1, wherein The wedge-shaped shield adopts a biomimetic mosquito mouthpart structure design, and its inclined surface is used to arrange the tool holder to increase the cutting surface.

3. The wedge-shaped chape structure of claim 1, wherein The cage-type crushing device, consisting of the front cage frame and the rear cage frame, can crush hard rocks to adapt to different soil types.

4. The wedge-shaped shield head structure as described in claim 1, characterized in that, The partition plate is used to isolate the soil being cut, and the notch at its lower end is used to transport the soil being cut.

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