Self-cleaning crushing device for tube push bench

Abstract

The utility model discloses a self-cleaning crushing device for a tube push bench. The self-cleaning crushing device for the tube push bench comprises a cutterhead rotationally connected with a rack, a plurality of strip-shaped crushing arms are arranged on the back face of the cutterhead, conical plates fixedly connected with the rack are arranged on the outer sides of the crushing arms, gaps are reserved between the conical plates and the crushing arms, and crushing strips matched with the crushing arms are arranged on the conical plates. A plurality of through holes used for deslagging are formed in the conical plate, and a plurality of brush bodies arranged in a line are arranged on the crushing arm and used for dredging the through holes. The utility model solves the problem that the pipe jacking project progress is influenced by the phenomenon of unsmooth deslagging in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of underground engineering, in particular to a self-cleaning crushing device for a pipe jacking machine. Background Art

[0002] There is a Chinese utility model patent with the publication number of CN206522139U and the name of "An active crushing device for a tunnel boring machine". This active crushing device for a tunnel boring machine includes a cutter head, a driving mechanism for driving the cutter head to rotate, a crushing arm connecting the cutter head and the driving mechanism, and a conical plate arranged corresponding to the crushing arm. There is an extrusion gap reserved between the crushing arm and the conical plate for extruding crushed stones of different sizes, and through holes for the crushed materials to pass through after crushing are also arranged on the conical plate.

[0003] However, in pipe jacking projects, many positions are in alluvial strata of rivers, lakes and seas. These strata often contain a large number of shells and other flakes, which will be in a flaky shape after being crushed during the construction of the project. When the quantity accumulates to a certain extent, it will block the through holes, so that the muck cannot be smoothly discharged outside the machine through the through holes. This will greatly affect the progress of the pipe jacking project, resulting in low construction efficiency, and in serious cases, it will even cause the project to stop work. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a self-cleaning crushing device for a pipe jacking machine that can prevent the through holes from being blocked, ensure the smooth passage of the muck, and then ensure the smooth progress of the pipe jacking project in view of the deficiencies of the existing technology.

[0005] To achieve the above purpose, the technical solution adopted by the self-cleaning crushing device for a pipe jacking machine of the utility model is as follows:

[0006] A self-cleaning crushing device for a pipe jacking machine includes a cutter head rotatably connected to a frame. A plurality of strip-shaped crushing arms are arranged on the back of the cutter head. A conical plate fixedly connected to the frame is arranged on the outer side of the crushing arms. There is a gap between the conical plate and the crushing arms. Crushing strips cooperating with the crushing arms are arranged on the conical plate. A plurality of through holes for discharging muck are formed on the conical plate. A plurality of brush bodies arranged in a row are arranged on the crushing arms for dredging the through holes.

[0007] Preferably, the brush bodies are steel wire bundles. The steel wire bundles have good rigidity and toughness, and can effectively remove the flakes blocking the through holes.

[0008] Preferably, grooves for inserting the steel wire bundles are formed on the end faces of the crushing arms facing the conical plate, and both sides of the steel wire bundles are welded to the edges of the grooves. The steel wire bundles can be embedded into a part of the crushing arms to improve the connection reliability with the crushing arms, thereby prolonging the service life.

[0009] Preferably, a gap of 10-20 mm is left between the steel wire bundle and the crushing arm. The 10-20 mm gap allows flakes to slide out from the through holes.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] The brush body installed on the crushing arm rotates synchronously with the cutter head, which can timely remove the flakes blocking the through holes, prevent the through holes from being blocked, ensure the smooth passage of muck, and then ensure the smooth progress of the pipe jacking project. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the self-cleaning crushing device for a pipe jacking machine of the utility model;

[0013] Figure 2 is a schematic working diagram of the cleaning of flakes.

[0014] Among them, 1 is the cutter head, 2 is the crushing arm, 21 is the groove, 3 is the conical plate, 31 is the through hole, 4 is the crushing bar, 5 is the brush body, and 6 is the flake. Detailed Embodiments

[0015] The following further clarifies the utility model in conjunction with the drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the utility model and not to limit the scope of the utility model. After reading the utility model, various equivalent forms of modification by those skilled in the art fall within the scope defined by the appended claims of this application.

[0016] As Figure 1-2 shown, a self-cleaning crushing device for a pipe jacking machine includes a cutter head 1 rotatably connected to a frame. Six strip-shaped crushing arms 2 are fixedly connected to the back of the cutter head. The six strip-shaped crushing arms are evenly arranged in a divergent manner. A conical plate 3 fixedly connected to the frame is arranged outside the crushing arms. A gap is left between the conical plate and the crushing arms. Crushing bars 4 cooperating with the crushing arms are fixedly connected to the conical plate. The crushing arms and the crushing bars cooperate to crush stones, shells, etc. A number of through holes 31 for discharging muck are opened on the conical plate. A number of brush bodies 5 arranged in a row are installed on the crushing arms for dredging the through holes. The brush bodies are steel wire bundles. The steel wire bundles have good rigidity and toughness and can effectively remove the flakes blocking the through holes. Grooves 21 for inserting the steel wire bundles are opened on the end faces of the crushing arms facing the conical plate. Both sides of the steel wire bundles are welded to the edges of the grooves. The steel wire bundles can be embedded into the crushing arms partially to improve the connection reliability with the crushing arms, thereby extending the service life. A gap of 10-20 mm is left between the steel wire bundles and the crushing arms to allow flakes 6 to slide out from the through holes.

[0017] Specific working process and principle of a self-cleaning crushing device for a pipe jacking machine: The steel wire bundles rotate synchronously with the cutter head and the crushing arms, continuously sweeping the outer side of the conical plate. When there are flakes blocking the through holes, the steel wire bundles continuously impact the flakes until the flakes break. A part of the broken flakes enters the suction chamber through the through holes, and the other part remains between the crushing arms and the conical plate. After being crushed again, it enters the suction chamber through the through holes and is finally discharged. By arranging steel wire bundles on the crushing arms, the present utility model can timely clean the flakes blocking the through holes in the pipe jacking project, keep the slag discharge of the through holes smooth, and thus ensure the smooth progress of the pipe jacking project.

Claims

1. A self-cleaning crushing device for a pipe jacking machine, comprising a cutter disc rotatably connected to a frame, a plurality of strip-shaped crushing arms arranged on the back of the cutter disc, a conical plate fixed to the frame arranged on the outer side of the crushing arm, a gap left between the conical plate and the crushing arm, a crushing strip matched with the crushing arm arranged on the conical plate, a plurality of through holes for slag discharge opened on the conical plate, characterized in that: The crushing arm is provided with a plurality of brush bodies arranged in a line for clearing the through hole.

2. The self-cleaning crushing device for a pipe jacking machine according to claim 1, characterized in that: The brush body is a steel wire bundle.

3. The self-cleaning crushing device for a pipe jacking machine according to claim 2 is characterized in that: The end surface of the crushing arm facing the conical plate is provided with a groove for inserting the steel wire bundle, and two sides of the steel wire bundle are welded to the edge of the groove.

4. The self-cleaning crushing device for a pipe jacking machine according to claim 3 is characterized in that: A gap of 10-20 mm is left between the steel wire bundle and the crushing arm.

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