Shield tunneling machine cutter with double-edge composite structure

Abstract

The shield tunneling machine cutter with the double-edge composite structure comprises a cutter shaft, an end cover, a cutter hub and a cutter ring, the end cover is arranged on the outer side of the cutter shaft, the cutter hub is arranged on the outer side of the end cover, and the cutter ring is arranged on the outer side of the cutter hub. According to the shield tunneling machine cutter of the double-edge composite structure, when power is transmitted to other parts of the cutter through the cutter shaft, the cutter ring serves as a key part in direct contact with a rock-soil body, rock-soil is cut and crushed, so that a shield tunneling machine can be smoothly pushed forwards, and meanwhile, in the pushing process, the cutter ring is not damaged. The wear-resistant welding wire and the welding wire ring uniformly transmit impact force to the cutter ring and the cutter hub through self deformation and stress dispersion effects on the cutter ring, so that the impact resistance of the wear-resistant welding wire and the welding wire ring is improved, and the cutter is protected from being damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shield machine cutter technical field, concretely to a shield machine cutter of double blade composite structure. BACKGROUND

[0002] The shield machine cutter has the problems of serious cutter wear and easy damage.

[0003] The main reason is that the cutter needs to bear huge pressure, friction and impact force when the shield machine digs underground tunnels, and also faces complex and changeable geological conditions, and the cutter ring directly contacts with the rock and soil and is easily seriously worn. Especially in hard rock strata, the cutter wears faster, and when the cutter encounters hard rock or complex geological conditions, the cutter load increases, and part of the cutter will be damaged due to excessive load, which not only shortens the service life of the overall cutter, increases the frequency of cutter replacement, but also affects the progress and cost of shield construction. SUMMARY

[0004] The utility model aims at providing a shield machine cutter of double blade composite structure to solve the problem of fast cutter wear and short service life of the cutter in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a shield machine cutter of double blade composite structure, comprising a cutter shaft, an end cover, a cutter hub and a cutter ring, the outer side of the cutter shaft is provided with the end cover, the outer side of the end cover is provided with the cutter hub, the outer side of the cutter hub is provided with the cutter ring, the outer side of the cutter ring is provided with a welding wire ring, the cutter ring is welded on the cutter hub, and the welding wire ring is fixedly welded on the cutter ring, the outer side of the welding wire ring is provided with wear-resistant welding wire, the welding wire ring is covered by the wear-resistant welding wire, the wear-resistant welding wire is also fixedly welded on the cutter ring, the outer side of the wear-resistant welding wire is provided with a convex ring protruding outward, the inside of the cutter shaft is provided with a balance valve, and the balance valve and the oil way in the cutter shaft are in communication.

[0006] Preferably, the outer side of the cross section of the convex ring is provided with a crescent-shaped notch.

[0007] Preferably, the wear-resistant welding wire and the welding wire ring are designed in an L shape on the cutter ring.

[0008] Preferably, a plurality of flow channels are formed in the balance valve.

[0009] Compared with the prior art, the utility model has the advantages of the following:

[0010] The shield machine cutter of double blade composite structure has the advantages that the wear-resistant welding wire and the welding wire ring are designed in an L shape on the cutter ring, the impact force is evenly transmitted to the cutter ring and the cutter hub, the impact resistance of the two is improved, and the cutter is protected from damage.

[0011] Meanwhile, in the process of tunneling, the crescent-shaped notch formed on the convex ring can change the contact mode between the rock-soil body and the convex ring and the wear-resistant welding wire, reduce the friction and wear, and in turn reduce the loss of the wear-resistant welding wire and the convex ring, and further improve the wear resistance and service life of the cutter.

[0012] By increasing the oil circuit balance valve, when hard rock or complex geological conditions are encountered, the oil circuit balance valve can balance the load of each cutter, avoid damage of a cutter due to excessive load, and achieve the purpose of prolonging the service life of the cutter. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is a sectional view of the whole utility model;

[0014] Fig. 2 It is a sectional view of the wear-resistant welding wire of the utility model.

[0015] In the figure: 1, cutter shaft; 2, end cover; 3, cutter hub; 4, cutter ring; 5, welding wire ring; 6, wear-resistant welding wire; 61, convex ring; 7, balance valve. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0017] Please refer to Figs. 1-2The utility model provides a kind of double-edge composite structure's shield machine cutter, including cutter shaft 1, end cap 2, cutter hub 3 and cutter ring 4, the outside of cutter shaft 1 is equipped with end cap 2, the outside of end cap 2 is equipped with cutter hub 3, the outside of cutter hub 3 is equipped with cutter ring 4, the outside of cutter ring 4 is equipped with welding wire ring 5, cutter ring 4 is welded on cutter hub 3, welding wire ring 5 is fixedly welded on cutter ring 4 simultaneously, the outside of welding wire ring 5 is equipped with wear-resistant welding wire 6, and welding wire ring 5 is covered by wear-resistant welding wire 6, wear-resistant welding wire 6 is also fixedly welded on cutter ring 4, the outside of wear-resistant welding wire 6 is equipped with the convex ring 61 that protrudes outward, cutter shaft 1 is the core support component of entire cutter, it is connected with the power system of shield machine.In the working of shield machine, power is transmitted to other components of cutter by cutter shaft 1, cutter ring 4 is as the key component directly contacted with rock-soil body, starts to cut and crush rock-soil, so that shield machine can be smoothly pushed forward, while in the process of advancing, wear-resistant welding wire 6 and welding wire ring 5 are evenly transmitted to cutter ring 4 and cutter hub 3 on cutter ring 4 by the deformation and stress dispersion of itself, to improve the impact resistance of both, protect cutter from damage, the inside of cutter shaft 1 is equipped with balance valve 7, balance valve 7 is interconnected with the oil passage in the inside of cutter shaft 1, the stable and efficient operation of cutter system is ensured by the accurate flow and pressure regulation of balance valve 7.

[0018] Further, the outside of the section of convex ring 61 is provided with a crescent-shaped notch, the crescent-shaped notch can reduce the wear of wear-resistant welding wire 6 and convex ring 61 when advancing forward, thereby reducing the loss of wear-resistant welding wire 6 and convex ring 61.

[0019] Further, wear-resistant welding wire 6 and welding wire ring 5 are designed as L-shaped on cutter ring 4, which improves the impact resistance of both when wear-resistant welding wire 6 and welding wire ring 5 are impacted during advancing.

[0020] Further, a plurality of flow channels are formed in balance valve 7, balance valve 7 is driven by water pressure, to ensure the stability of the rotation speed and torque of cutter, thereby improving the advancing efficiency, and in complex advancing conditions, balance valve 7 can ensure the load balance of each cutter, to avoid failure or damage of a cutter due to excessive load.

[0021] Working principle: a kind of double-edge composite structure's shield machine cutter of the utility model, cutter shaft 1 is the core support component of entire cutter, it is connected with the power system of shield machine.When multiple cutters work simultaneously, the balance valve 7 connected with oil circuit can balance the pressure between each cutter hydraulic circuit, prevent the inconsistent cutter action caused by uneven pressure, power is transmitted to the other components of cutter by cutter shaft 1, cutter ring 4 as the key component directly contacted with rock-soil body, start cutting and crushing rock-soil, so that shield machine can smoothly advance, while in the advancing process, wear-resistant welding wire 6 and welding wire ring 5 are on cutter ring 4 by the deformation and stress dispersion effect of itself, impact force is evenly transmitted to cutter ring 4 and cutter hub 3, so as to improve the impact resistance of both, protect cutter from damage.

[0022] Although the embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A double-blade composite structure of a shield machine cutter, comprising a cutter shaft (1), an end cover (2), a cutter hub (3) and a cutter ring (4), the outer side of the cutter shaft (1) is provided with the end cover (2), the outer side of the end cover (2) is provided with the cutter hub (3), and the outer side of the cutter hub (3) is provided with the cutter ring (4), characterized in that: The outer side of the cutter ring (4) is provided with a welding wire ring (5), the cutter ring (4) is welded on the cutter hub (3), meanwhile the welding wire ring (5) is fixedly welded on the cutter ring (4), the outer side of the welding wire ring (5) is provided with wear-resistant welding wires (6), the welding wire ring (5) is covered by the wear-resistant welding wires (6), the wear-resistant welding wires (6) are also fixedly welded on the cutter ring (4), the outer side of the wear-resistant welding wires (6) is provided with outwardly protruding convex rings (61), the inside of the cutter shaft (1) is provided with a balance valve (7), the balance valve (7) is communicated with the oil passage in the cutter shaft (1).

2. A twin-blade composite structure's shield machine cutter according to claim 1, characterized in that: The outer side of the section of the convex ring (61) is provided with a crescent-shaped notch, the crescent-shaped notch can reduce the abrasion of the wear-resistant welding wires (6) and the convex ring (61) when the wear-resistant welding wires (6) and the convex ring (61) are forwardly excavated, thereby reducing the loss of the wear-resistant welding wires (6) and the convex ring (61).

3. The dual blade composite structure cutter of a shield tunneling machine according to claim 1, characterized in that: The wear-resistant welding wires (6) and the welding wire ring (5) are designed in L shape on the cutter ring (4), when the wear-resistant welding wires (6) and the welding wire ring (5) are excavated and impacted, the impact resistance of the two is improved.

4. The dual blade composite structure cutter of a tunneling machine according to claim 1, wherein: A plurality of flow channels are formed in the balance valve (7).

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