Equipment for preventing mud cakes from being formed in center area of cutter head

Abstract

The utility model relates to the technical field of cutterheads, in particular to equipment for preventing mud cakes from being formed in the center area of a cutterhead, which comprises a washing device arranged on a steel plate in the center area of the cutterhead and used for washing the center area of the cutterhead through high-pressure water flow to prevent the mud cakes from being formed; the water supply system is connected with the flushing device and used for providing high-pressure water flow for the flushing device; and the control unit is used for controlling the working state of the flushing device and automatically adjusting the opening and closing of the flushing device according to the torque change of the cutterhead, so that the equipment for preventing the mud cake from being formed in the central area of the cutterhead effectively avoids the problems that the pressure of high-pressure water fed back to the cutterhead is low and the mud cake is difficult to form in the prior art. And therefore, the risk that the mud cake is formed in the soil bin is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cutter head technical field, specifically a prevent the equipment of mud cake of cutter head center area. BACKGROUND

[0002] Inject high pressure water at the prescribed time interval and clean the cutter head and the soil bin, and add dispersant, foam, high molecular polymer and other additives in the high pressure water, use the rotation stirring of the cutter head, the stirring of the soil bin stirring device or the rotation stirring of the screw conveyor to make the additives mix with the muck, so that the muck cut by the shield has good flow plasticity, suitable consistency, lower water permeability and smaller friction, thereby reducing the torque suffered by the cutter head, making the cutter head cut the soil fully, reducing the friction between the cutter head and the stratum and reducing the disturbance to the stratum.

[0003] The mud cake of the cutter head of the shield machine is that the muck cut by the cutter head stays between the cutter head and the shield excavation surface, forms solid or semi-solid block under the extrusion of the cutter head and adheres to block the cutter head. When the cutter head of the shield machine has mud cake, the cutters on the cutter head will be gradually covered by the solidified clay, resulting in reduced cutter penetration when cutting the stratum and reduced shield excavation efficiency. If the mud cake of the cutter head of the shield machine is not properly disposed and the shield continues to advance, the mud cake of the cutter head will be more and more dense under pressure, solidified into rock, resulting in large fluctuation of the tunneling parameters, over-high muck temperature and other conditions, which greatly reduces the controllability of the shield tunneling risk and poses a great threat to the safety of the equipment. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a prevent the equipment of mud cake of cutter head center area to solve the problem in the prior art.

[0005] To achieve the above object, the utility model provides the following technical scheme.

[0006] A prevent the equipment of mud cake of cutter head center area, comprising:

[0007] The flushing device is arranged on the steel plate in the center area of the cutter head and is used for flushing the center area of the cutter head by high pressure water flow to prevent the formation of mud cake.

[0008] The water supply system is connected with the flushing device and is used for providing high pressure water flow to the flushing device.

[0009] And the control unit is used for controlling the working state of the flushing device and automatically adjusting the opening and closing of the flushing device according to the change of the cutter torque.

[0010] As a further scheme of the utility model: the flushing device includes multiple spray heads, the spray heads are evenly distributed along the cutter center area, and the spray direction of the spray head is towards the cutter center area.

[0011] As a further scheme of the utility model: the spray head is connected with the water supply system through a pipeline, and a one-way valve is arranged on the pipeline to prevent water flow from flowing back.

[0012] As a further scheme of the utility model: the water supply system includes a high-pressure water pump and a water tank, and the high-pressure water pump is used to pressurize the water in the water tank and then deliver the water to the flushing device.

[0013] As a further scheme of the utility model: the control unit includes a torque sensor and a controller, the torque sensor is used to monitor the torque change of the cutter in real time, and the controller automatically controls the opening and closing of the flushing device according to the torque change.

[0014] As a further scheme of the utility model: the controller is also provided with a manual control mode, and the operator can manually control the working state of the flushing device according to the actual working condition.

[0015] As a further scheme of the utility model: the spray head of the flushing device adopts a bidirectional spray design, which can flush the cutter center area and the inner side of the soil bin at the same time.

[0016] As a further scheme of the utility model: the water supply system is also provided with a filter for filtering impurities in the water to prevent the spray head from being blocked.

[0017] As a further scheme of the utility model: the device also includes an alarm device for issuing an alarm signal when the flushing device works abnormally or the water supply system pressure is insufficient.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] The flushing device for preventing the cutter of the shield machine from forming mud cake in the utility model effectively avoids the technical problem that the high-pressure water pressure fed back to the cutter is low in the prior art, which leads to poor flushing effect or difficulty in dispersing the mud cake, and effectively prevents the risk of mud cake formation in the soil bin. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure schematic view of the flushing device in the utility model.

[0021] Figure 2 It is a sectional structure schematic view of the steel plate in the utility model.

[0022] In the drawing: 1-spray head, 2-steel plate, 3-one-way valve, 4-pipeline. DETAILED DESCRIPTION

[0023] Clearly, the described embodiments are merely a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all the other embodiments obtained by the ordinary skilled in the art without making creative labor are within the protection scope of the present utility model.

[0024] The specific implementation of the present utility model will be described in detail in combination with specific embodiments.

[0025] Please refer to Figure 1 and Figure 2 The utility model embodiment provides a prevent the center area of cutter head from forming mud cake equipment, which comprises:

[0026] The flushing device is arranged on the steel plate 2 in the center area of the cutter head, and is used for flushing the center area of the cutter head by high-pressure water flow to prevent the formation of mud cake.

[0027] The water supply system is connected with the flushing device, and is used for providing high-pressure water flow to the flushing device.

[0028] The control unit is used for controlling the working state of the flushing device, and automatically adjusts the opening and closing of the flushing device according to the torque change of the cutter head.

[0029] In an embodiment of the present utility model, please refer to Figure 1 and Figure 2 The flushing device comprises a plurality of spray heads 1, the spray heads 1 are uniformly distributed along the center area of the cutter head, and the spray direction of the spray head 1 is towards the center area of the cutter head.

[0030] The spray head 1 is connected with the water supply system through the pipeline 4, and a one-way valve 3 is arranged on the pipeline 4, which is used for preventing the backflow of water flow.

[0031] The water supply system comprises a high-pressure water pump and a water tank, and the high-pressure water pump is used for pressurizing the water in the water tank and then delivering the water to the flushing device.

[0032] The control unit comprises a torque sensor and a controller, the torque sensor is used for monitoring the torque change of the cutter head in real time, and the controller automatically controls the opening and closing of the flushing device according to the torque change.

[0033] The controller is also provided with a manual control mode, and the operator can manually control the working state of the flushing device according to the actual working condition.

[0034] The spray head 1 of the flushing device adopts a bidirectional spray design, which can flush the center area of the cutter head and the inner side of the soil bin at the same time.

[0035] The water supply system is also provided with a filter, which is used for filtering the impurities in the water to prevent the spray head 1 from being blocked.

[0036] In an embodiment of the utility model, please refer to Figure 1 And Figure 2 The device further comprises an alarm device for sending an alarm signal when the flushing device is abnormal or the water supply system pressure is insufficient.

[0037] In the process of using the device, in order to reduce the risk of mud cake in the center area of the cutter head, the corresponding water flushing channel is added in the center area of the cutter head, the three hydraulic channels on the cutter head are changed into radial water flushing channels (adjusting the overbreak cutter oil circuit and one cutter inspection), and the corresponding rotation center oil circuit channel is changed into water injection; the two flushing pipelines are led out by the L-shaped beam, a tee joint is added, the two-way design is changed into one drags two design, there are six spray nozzles (two-way spray nozzles), four spray nozzles are in the leg twisting direction, and the remaining two-way spray nozzles can flush the center position, the spray nozzles flush the inside of the soil bin by adding a high-pressure pump; the technical problem that the high-pressure water pressure fed back to the cutter head is low in the prior art, the flushing effect is poor, or it is difficult to disperse the mud cake, and the risk of mud cake in the soil bin is effectively prevented.

[0038] The construction method of the flushing device for preventing mud cake of the cutter head of the shield machine is as follows: (1) according to the tunneling parameters and the discharging condition, the shield driver opens the cutter head water spray, and observes the change of the cutter head torque; (2) the cutter head water spray is closed after tunneling is completed.

[0039] It should be noted that, in the utility model, unless otherwise explicitly specified and limited, the terms "sliding", "rotating", "fixed", "provided with" and the like should be understood broadly, for example, it can be a welded connection, or a bolted connection, or integrated; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0040] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and the skilled person in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that can be understood by the skilled person.

Claims

1. An apparatus for preventing balling in the center region of a cutterhead, comprising: The device comprises: a flushing device arranged on a steel plate in the center area of the cutter head, for flushing the center area of the cutter head by high-pressure water flow to prevent the formation of mud cake; a water supply system connected with the flushing device, for providing high-pressure water flow to the flushing device; and a control unit for controlling the working state of the flushing device, automatically adjusting the opening and closing of the flushing device according to the torque change of the cutter head.

2. The apparatus for preventing cake building in the center region of a cutterhead of claim 1, wherein, The flushing device comprises a plurality of nozzles, which are uniformly distributed along the center area of the cutter head, and the spray direction of the nozzles is towards the center area of the cutter head.

3. The apparatus for preventing cake building in the center region of a cutterhead of claim 2, wherein, The nozzles are connected with the water supply system through pipes, and one-way valves are arranged on the pipes to prevent backflow of water.

4. The apparatus for preventing cake building in the center region of a cutterhead of claim 1, wherein, The water supply system comprises a high-pressure water pump and a water tank, and the high-pressure water pump is used to pressurize the water in the water tank and deliver it to the flushing device.

5. The apparatus for preventing cake building in the center region of a cutterhead of claim 1, wherein, The control unit comprises a torque sensor and a controller, the torque sensor is used to monitor the torque change of the cutter head in real time, and the controller automatically controls the opening and closing of the flushing device according to the torque change.

6. The apparatus for preventing cake building in the center region of a cutterhead of claim 5, wherein, The controller is also provided with a manual control mode, and the operator can manually control the working state of the flushing device according to the actual working condition.

7. The apparatus for preventing cake building in the center region of a cutterhead of claim 2 or 3, wherein, The nozzles of the flushing device adopt a bidirectional spray design, which can flush the center area of the cutter head and the inside of the soil bin at the same time.

8. The apparatus for preventing cake building in the center region of a cutterhead of claim 4, wherein, The water supply system is also provided with a filter for filtering impurities in the water to prevent the nozzles from being blocked.

9. The apparatus for preventing cake building in the center region of a cutterhead of claim 1, wherein, The device also comprises an alarm device for issuing an alarm signal when the flushing device works abnormally or the water supply system pressure is insufficient.

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