Double-ring web type cutter head of earth pressure balance shield mechanism
A technology of earth pressure balance and shield machine, which is applied in earth square drilling, mining equipment, tunnels, etc. It can solve the problems of small opening ratio, mud cake in the center, low support strength, etc., and achieve large opening ratio, uniform distribution, The effect of preventing soil loss
Inactive Publication Date: 2014-06-11
TIANJIN UNIV
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Problems solved by technology
[0004] In order to solve the problems of the existing concentric double-ring cutter head with small opening ratio, easy to cause mud cake in the center, and low support strength, the present invention provides a double-ring radial plate type shield cutter head, which not only has a large opening ratio, but also High support strength, thus improving tunneling efficiency and shortening construction period
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[0014] The principle of the cutterhead of the present invention will be further described below through specific embodiments. The cutterhead of the present invention includes two inner and outer cutterhead surfaces. See figure 1 .
[0015] The cutter head of this design adopts a three-symmetric structure bracket, and the cutter head is composed of two inner and outer cutter heads. The surface of the inner cutter head is a box type with a symmetrical structure, which is composed of two symmetrical three-spokes. The diameter is 7000mm, and the opening at the center diameter is 1200mm. The super large central opening prevents mud cake in the center and ensures the excavation efficiency. Increase the central opening ratio, and achieve a local opening ratio of over 85% in an area with a diameter of 2.4 meters. This design improves the force at the center and avoids the problem of mud cake in the center.
[0016] figure 2 The three narrower spokes 18 shown are main spokes, and ...
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The invention belongs to the technical field of tunneling machines and relates to a double-ring web type cutter head of an earth pressure balance shield mechanism. The double-ring web type cutter head comprises an inner cutter head and an outer cutter head, wherein a central circular opening is formed at the center of the inner cutter head and is used for arranging a central conical excavating cutter and a central cutter; the inner cutter head is composed of three symmetrical structures comprising three main spokes and three wide beams, which are symmetrically distributed; one wide beam is arranged between each two main spokes; an opening is arranged in the middle of each wide beam; inner sides between the main spokes and the wide beams are connected through a connecting box body respectively and outer sides are connected through a connecting rib respectively; and the openings in the middles of the wide beams are connected through an inner connecting rib (7). The double-ring web type cutter head can prevent forming of a mud cake and meets the requirements of structural strength; moreover, earth loss is prevented; and the double-ring web type cutter head has large openings of the spokes and also has the strong supporting of a panel.
Description
technical field [0001] The invention belongs to the technical field of tunneling machinery and relates to a shield cutterhead. Background technique [0002] Shield boring machine is a kind of special engineering machinery for tunnel boring. At present, the use of shield machines for tunnel construction in underground projects is becoming more and more widespread. As one of the key equipment of shield machines, the structure of the cutterhead device will directly affect the performance and efficiency of shield machines. The design of the cutterhead cutter greatly affects the working efficiency of the shield machine, and different cutter layouts are required for different stratum structures. However, the traditional concentric double-ring cutter head has insufficient mechanical support strength for the working surface due to the design of the peripheral ring cutter head. For this reason, six-spoke cutter heads are often used, but this reduces the opening ratio of the cutter h...
Claims
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IPC IPC(8): E21D9/08
Inventor刘蒙蒙刘建琴郭伟蒋聪健赵多
OwnerTIANJIN UNIV