Cutterhead capable of preventing mud cakes from forming

Abstract

The utility model relates to the technical field of shield tunneling machines, in particular to an anti-mud-cake cutterhead which comprises a cutterhead body and a plurality of heavy hammer structures, the aperture ratio of the cutterhead body is increased and the contact area of the cutterhead body and a soil body is reduced through the arrangement of a plurality of openings, and a high-pressure mud spray head can be installed at a scouring opening. Mud on the cutterhead body is scoured by spraying mud, meanwhile, the heavy hammer structure swings along with rotation of the cutterhead body, soil in the middle of the auxiliary arm is impacted through inertia, the heavy hammer structure swings along with rotation of the cutterhead body to generate vibration through forward and reverse rotation of the cutterhead body, and then the soil on the surface of the cutterhead body is shaken off; due to the fact that the protruding rivets are arranged on the surface of the cutter head body, attachment of soil is disturbed through friction and disturbance with the soil, forming of mud cakes is prevented, by the adoption of the structure, it is guaranteed that the surface of the cutter head body is kept clean through the combined action of vibration of the heavy hammer structure and mechanical disturbance of the rivets, and the mud cake bonding preventing effect of the cutter head body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machines, in particular to a cutter head capable of preventing mud cakes from forming. Background Art

[0002] During the construction process of the shield machine, shield excavation has a certain geological adaptability. Once the selection is unreasonable, the geology is relatively complex, or the shield operator uses improper construction methods, the shield construction efficiency will be low.

[0003] In the actual application of shield machines, when the shield machine is excavating complex strata such as clay, various types of mudstone, and strongly weathered soft rock, the opening of the cutterhead is easily blocked by clay, making it difficult for the slurry between the cutterhead and the tunnel face to flow into the excavation chamber. After multiple rolling, the slurry is very likely to form a mud cake on the surface of the cutterhead. If the mud cake formed on the surface of the cutterhead is not cleaned in time, it will cause a vicious cycle. Once the thickness of the mud cake exceeds the height of the excavator, the shield cutterhead will lose its excavation ability, seriously affecting the shield construction.

[0004] Although the existing technology uses high-pressure water jets, additives and other anti-mud cake technologies to remove the mud cake on the cutter head, the anti-mud cake technology in the existing technology has limited effect in specific formations, resulting in unsatisfactory anti-mud cake effect on the cutter head. Utility Model Content

[0005] The purpose of the utility model is to provide a cutterhead with an anti-mud cake function, so as to solve the problem that the anti-mud cake technology in the prior art has limited effect in specific strata, resulting in an unsatisfactory anti-mud cake effect of the cutterhead.

[0006] To achieve the above-mentioned purpose, the utility model provides a cutter disc for preventing mud cakes from forming, wherein the cutter disc for preventing mud cakes from forming comprises a cutter disc body and a plurality of weight structures, a plurality of openings are provided in the central area of ​​the cutter disc body, each of the openings is provided with a flushing port, a plurality of auxiliary arm frames are provided between each of the auxiliary arms and the two adjacent main arms, the weight structure is provided inside each of the auxiliary arm frames, a rivet structure is provided on the surface of each of the main arms, and the rivet structure is composed of a plurality of raised rivets.

[0007] Among them, each of the weight structures includes two front rollers, a connecting shaft and a weight body. The front rollers are arranged on both sides of each auxiliary arm frame. The connecting shaft is installed between the two corresponding front rollers, and the weight body is fixedly arranged in the middle of the connecting shaft.

[0008] Wherein, each of the weight structures further includes two side rollers, and the side rollers are provided at both ends of each connecting shaft, and the side rollers are fitted with the corresponding mounting rails of the auxiliary arm frame.

[0009] Wherein, one end of each rivet away from the main arm is arranged in an arc top structure.

[0010] The utility model discloses a cutter disc for preventing mud cakes, comprising a cutter disc body and a plurality of weight hammer structures. The plurality of openings are arranged to increase the opening rate of the cutter disc body, reduce the contact area between the cutter disc body and the soil, and improve the passing rate of slurry. A high-pressure mud nozzle can be installed at the flushing port to flush the soil on the cutter disc body by spraying mud. At the same time, the weight hammer structure installed on the cutter disc body swings when the cutter disc body rotates, and uses inertia to impact the soil in the middle of the auxiliary arm. The weight hammer structure can also be made to swing when the cutter disc body rotates through the forward and reverse rotation of the cutter disc body to generate vibration, thereby shaking off the mud on the surface of the cutter disc body. At the same time, since the raised rivets are provided on the surface of the cutter disc body, the friction and disturbance with the soil disrupt the adhesion of the soil, preventing the formation of mud cakes. With the above structure, the vibration of the weight hammer structure and the mechanical disturbance of the rivet work together to ensure that the surface of the cutter disc body remains clean, and the anti-mud cake effect of the cutter disc body is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 It is a structural schematic diagram of a cutter disc for preventing mud cake formation provided by the utility model.

[0013] Figure 2 It is an enlarged structural schematic diagram of the rivet provided by the utility model.

[0014] Figure 3 It is a schematic cross-sectional view of the heavy hammer structure provided by the utility model.

[0015] 101-cutter disc body, 102-main arm, 103-auxiliary arm, 104 opening, 105-flushing port, 106-auxiliary arm frame, 107-rivet, 108-front roller, 109-connecting shaft, 110-weight hammer body, 111-side roller. DETAILED DESCRIPTION

[0016] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0017] See also Figures 1 to 3 The present invention provides a cutter disc for preventing mud cakes from forming, and the cutter disc for preventing mud cakes from forming comprises a cutter disc body 101 and a plurality of weight structures, a plurality of main arms 102 and a plurality of auxiliary arms 103 are evenly and staggeredly arranged on the cutter disc body 101, a plurality of openings 104 are arranged in the central area of ​​the cutter disc body 101, each of the openings 104 is provided with a flushing port 105, a plurality of auxiliary arm frames 106 are arranged between each of the auxiliary arms 103 and two adjacent main arms 102, the weight structure is arranged inside each of the auxiliary arm frames 106, and a rivet structure is provided on the surface of each main arm 102, and the rivet structure is composed of a plurality of raised rivets 107.

[0018] In this embodiment, the opening rate of the cutter head body 101 is increased by setting a plurality of the openings 104, the contact area between the cutter head body 101 and the soil is reduced, and the passing rate of the slurry is improved. A high-pressure mud nozzle can be installed at the flushing port 105 to flush the soil on the cutter head body 101 by spraying mud. At the same time, the heavy hammer structure installed on the cutter head body 101 swings as the cutter head body 101 rotates, and uses inertia to impact the soil in the middle of the auxiliary arm 103, and can also pass through the cutter head body 101. The forward and reverse rotation causes the weight structure to swing as the cutter disc body 101 rotates, thereby generating vibration, thereby shaking off the mud on the surface of the cutter disc body 101. At the same time, since the raised rivets 107 are provided on the surface of the cutter disc body 101, the friction and disturbance with the mud disrupt the adhesion of the mud, preventing the formation of mud cakes. With the above structure, the vibration of the weight structure and the mechanical disturbance of the rivet 107 work together to ensure that the surface of the cutter disc body 101 remains clean, thereby improving the anti-mud cake effect of the cutter disc body 101.

[0019] Furthermore, each of the weight structures includes two front rollers 108, a connecting shaft 109 and a weight body 110. The front rollers 108 are provided on both sides of each auxiliary arm frame 106. The connecting shaft 109 is installed between the two corresponding front rollers 108, and the weight body 110 is fixedly provided in the middle of the connecting shaft 109.

[0020] In this embodiment, the installation of the weight body 110 is completed by the setting of the front roller 108 and the connecting shaft 109, and the setting of the front roller 108 makes the weight body 110 and the connecting shaft 109 slide more smoothly in the installation area of ​​the auxiliary arm frame 106.

[0021] Furthermore, each of the weight structures also includes two side rollers 111 , and each of the two ends of the connecting shaft 109 is provided with the side rollers 111 , and the side rollers 111 fit in contact with the corresponding mounting rails of the auxiliary arm frame 106 .

[0022] In this embodiment, the side rollers 111 are provided to provide lateral support force, thereby preventing the two front rollers 108 from getting stuck due to being out of sync when the weight body 110 and the connecting shaft 109 slide in the mounting rails of the auxiliary arm frame 106 .

[0023] Furthermore, one end of each rivet 107 away from the main arm 102 is configured to have an arc top structure.

[0024] In this embodiment, since the end of each rivet 107 is configured in an arc-top structure, the anti-mud cake effect of the cutter head body 101 is further improved.

[0025] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the utility model.

Claims

1. A cutter head for preventing mud cake formation, characterized in that: It includes a cutter disc body and multiple weight structures, multiple main arms and multiple auxiliary arms are evenly and staggeredly arranged on the cutter disc body, multiple openings are provided in the central area of ​​the cutter disc body, each of the openings is provided with a flushing port, multiple auxiliary arm frames are provided between each auxiliary arm and two adjacent main arms, the weight structure is provided inside each auxiliary arm frame, and a rivet structure is provided on the surface of each main arm, and the rivet structure is composed of multiple raised rivets.

2. The anti-mud cake cutter disc according to claim 1, characterized in that: Each of the weight structures includes two front rollers, a connecting shaft and a weight body. The front rollers are provided on both sides of each auxiliary arm frame. The connecting shaft is installed between the two corresponding front rollers, and the weight body is fixedly provided in the middle of the connecting shaft.

3. The anti-mud cake cutter disc according to claim 2, characterized in that: Each of the weight structures further includes two side rollers. Both ends of each connecting shaft are provided with the side rollers, and the side rollers are fitted with the corresponding mounting rails of the auxiliary arm frame.

4. The anti-mud cake cutter disc according to claim 3, characterized in that: One end of each rivet away from the main arm is arranged in an arc top structure.

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