Novel shield tunneling machine scraper

Abstract

The utility model provides a novel shield tunneling machine scraper which comprises a scraper body and a scraper holder, a wedge-shaped clamping groove is formed in the scraper holder, a clamping block is arranged on the scraper body, the shape of the clamping block is matched with that of the wedge-shaped clamping groove, the clamping block is inserted into the wedge-shaped clamping groove, at least two bolts are arranged on the scraper body in a penetrating mode, and the bolts are used for being connected with the scraper body and the scraper holder in a close-fitting mode. The scraper has the characteristic of improving the connection reliability between the scraper and the scraper holder.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machine cutters, in particular to a novel shield machine scraper. Background Art

[0002] At present, the shield machine is a kind of engineering machinery used for tunnel construction, which is widely used in tunnel projects such as subways, railways, highways, municipal engineering, hydropower, etc. In complex geological environments, scrapers are usually used as the main tool for shield machine excavation for excavation of soft soil layers.

[0003] In related design technologies, the scraper of the shield machine is installed on the cutter seat of the cutter disc through welding mounting plates on the spokes and bolted, usually arranged on both sides of the cutter disc opening slot. The scraper generates axial shear force and radial cutting force on the soil of the excavation surface as the cutter disc rotates. Under the rotation of the cutter disc, the blade and the head are inserted into the soil layer, continuously cutting off the soil in front of the excavation surface.

[0004] With regard to the above-mentioned related technologies, when the scraper is excavating in a stratum with uneven hardness, the impact force on the scraper is unstable, the scraper vibrates under the changing and fluctuating impact force, and the bolts on the blade holder are easily loosened. When the impact force is large, the bolts may break, causing the scraper to fall off, causing damage to other equipment components. Therefore, there is a problem of low reliability of the connection between the scraper and the blade holder.

[0005] In view of this, it is indeed necessary to provide a new type of shield machine scraper to solve the above-mentioned technical solutions. Utility Model Content

[0006] The utility model aims to provide a novel shield machine scraper to solve the problem of low reliability of connection between the scraper and the blade seat.

[0007] In order to achieve the above purpose, the utility model provides a new shield machine scraper, which adopts the following technical solutions:

[0008] A novel shield machine scraper comprises a scraper and a blade seat, wherein the blade seat is provided with a wedge-shaped slot, and the scraper is provided with a clamping block, the shape of the clamping block matches the shape of the wedge-shaped slot, and the clamping block is inserted into the wedge-shaped slot. At least two bolts are passed through the scraper, and the bolts are used to tightly connect the scraper and the blade seat.

[0009] As an optimization of a new shield machine scraper, the two side walls of the block are extended outward to provide limit blocks, the two side walls of the wedge-shaped slot are provided with bosses, and the limit blocks abut against the bosses.

[0010] As an optimization of a new type of shield machine scraper, the scraper is provided with a stopper along the insertion direction of the wedge-shaped slot, and the stopper abuts against the side wall of the blade seat.

[0011] Compared with the prior art, the beneficial effect of the utility model is that the scraper is inserted into the wedge-shaped slot of the blade holder through the clamping block, and the scraper and the blade holder are tightly connected by bolts. When the scraper of the shield machine is performing excavation operations, the impact force given to the scraper by the soil layer causes the clamping block to further wedge into the wedge-shaped slot, making the clamping block and the wedge-shaped slot increasingly tight, thereby limiting the rotation of the scraper relative to the blade holder and increasing the reliability of the connection between the scraper and the blade holder. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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 labor.

[0013] Figure 1 This is a schematic diagram of the overall structure of a new type of shield machine scraper for this application;

[0014] Figure 2 This is an exploded view of a new shield machine scraper along the Z direction for this application;

[0015] Figure 3 This is a schematic cross-sectional view along the X direction of a novel shield machine scraper according to the present application.

[0016] In the figure: 1, scraper; 11, clamping block; 2, knife holder; 21, wedge-shaped slot; 3, bolt; 4, limit block; 5, boss; 6, stop block. DETAILED DESCRIPTION

[0017] In order to make the technical solution and advantages of the utility model clearer, the utility model and its beneficial effects will be further described in detail below in combination with specific implementation methods and drawings of the specification, but the implementation methods of the utility model are not limited thereto.

[0018] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt the conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0020] The following is combined with Figure 1-3 , further details of this application are given.

[0021] This application provides a new shield machine scraper, which adopts the following technical solution:

[0022] Reference Figure 1 and Figure 2 The new shield machine scraper 1 includes a scraper 1 and a blade holder 2. The blade holder 2 is a rectangular parallelepiped, and the blade holder 2 is provided with an X direction, a Y direction and a Z direction, and the three directions are independent of each other and perpendicular to each other. A wedge-shaped card slot 21 is provided on one surface of the blade holder 2 along the Y direction, and the width of the wedge-shaped card slot 21 gradually decreases along the Y direction. The scraper 1 is integrally formed with a card block 11, and the shape of the card block 11 matches the shape of the wedge-shaped card slot 21. The card block 11 is inserted from the wide mouth of the wedge-shaped card slot 21 until the card block 11 is firmly plugged into the wedge-shaped card slot 21, limiting the movement of the scraper 1 in the X direction and the Y direction of the blade holder 2, so that the scraper 1 and the blade holder 2 are assembled together, and the movement of the scraper 1 in the Y direction of the blade holder 2 is limited, thereby improving the reliability of the connection between the scraper 1 and the blade holder 2.

[0023] Reference Figure 2 and Figure 3 Bolts 3 are provided on the scraper 1 along the Z direction, and threaded holes are provided on the blade holder 2 corresponding to the bolts 3 on the scraper 1. The bolts 3 are threadedly connected to the threaded holes. On the one hand, the scraper 1 and the blade holder 2 are tightly connected together, and on the other hand, the movement of the scraper 1 along the Z direction is restricted, thereby improving the connection reliability between the scraper 1 and the blade holder 2 in the Z direction. Further, there are at least two bolts 3, and the threaded holes on the blade holder 2 are located at the bottom of the wedge-shaped slot 21. In this embodiment, there are six bolts 3, and the six bolts 3 are distributed in two rows and three columns at the bottom of the wedge-shaped slot 21. By restricting multiple bolts 3 at different positions, the rotation of the scraper 1 on the XY plane of the blade holder 2 can be restricted, and the connection reliability between the scraper 1 and the blade holder 2 in the Z direction can be enhanced, thereby further improving the connection reliability between the scraper 1 and the blade holder 2.

[0024] In the preferred embodiment of the present application, refer to Figure 2 and Figure 3The two side walls of the block 11 extend outward (i.e., in the X direction) to integrally form a limit block 4, and the two side walls of the wedge-shaped slot 21 are integrally formed with a boss 5. The limit block 4 is aligned with the boss 5 in the Z direction, and the limit block 4 abuts against the boss 5, which limits the movement of the scraper 1 in the Z direction on the one hand, and limits the rotation of the scraper 1 in the YZ plane on the other hand, thereby improving the reliability of the connection between the scraper 1 and the blade holder 2.

[0025] In the preferred embodiment of the present application, refer to Figure 2 and Figure 3 The scraper 1 is integrally formed with a stopper 6 along the insertion direction of the wedge-shaped slot 21 (i.e., the Y direction), and the stopper 6 extends along the Z direction. When the block 11 of the scraper 1 is inserted into the wedge-shaped slot 21, the stopper 6 abuts against the side wall of the tool holder 2. On the one hand, it limits the movement of the scraper 1 along the Y direction, reducing the shear stress in the Y direction on the bolt 3 on the scraper 1, thereby extending the service life of the bolt 3. On the other hand, it limits the rotation of the scraper 1 in the XY plane, further improving the reliability of the connection between the scraper 1 and the tool holder 2.

[0026] The experimental principle of the embodiment of the present application is as follows: insert the block 11 of the scraper 1 into the wedge-shaped slot 21 of the blade holder 2, and then fasten the scraper 1 to the blade holder 2 by means of the bolt 3. When the scraper 1 is subjected to the impact force of the formation, the block 11 is further wedged along the extension direction of the wedge-shaped slot 21, and the wedge-shaped slot 21 limits the movement of the scraper 1 in the X and Y directions. The connection positions of the multiple bolts 3 limit the rotation of the scraper 1 in the XY plane, the limit block 4 abuts against the boss 5 to limit the movement of the scraper 1 in the Z direction, and the stopper 6 limits the movement of the scraper 1 in the Y direction, thereby reducing the shear stress on the bolt 3, and reducing the vibration of the scraper 1 relative to the blade holder 2 by limiting the freedom in multiple directions, thereby improving the reliability of the connection between the scraper 1 and the blade holder 2.

[0027] According to the disclosure and teaching of the above description, the technicians in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the above specific implementation, and any obvious improvement, replacement or modification made by the technicians in this field on the basis of the utility model belongs to the protection scope of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of explanation and do not constitute any limitation to the utility model.

Claims

1. A new shield machine scraper, characterized in that: It includes a scraper and a blade holder, wherein the blade holder is provided with a wedge-shaped slot, and the scraper is provided with a clamping block, the shape of the clamping block matches the shape of the wedge-shaped slot, and the clamping block is inserted into the wedge-shaped slot. The scraper is penetrated by at least two bolts, and the bolts are used to tightly connect the scraper and the blade holder.

2. A new shield machine scraper according to claim 1, characterized in that: The two side walls of the clamping block are extended outward to be provided with limit blocks, the two side walls of the wedge-shaped clamping slot are provided with bosses, and the limit blocks abut against the bosses.

3. A new shield machine scraper according to claim 1, characterized in that: The scraper is provided with a stopper along the insertion direction of the wedge-shaped slot, and the stopper abuts against the side wall of the blade seat.

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