Dynamic maintenance control system for cutter head driving system of shield tunneling machine

Abstract

The invention discloses a shield tunneling machine cutterhead driving system dynamic maintenance control system which comprises a circuit breaker, an isolation boosting transformer and an AC690V frequency converter which are sequentially connected with a power grid, and a programmable logic controller connected with the circuit breaker and electrically connected with an operation panel, an AC380V frequency converter, a contactor and the AC690V frequency converter. The AC690V frequency converter is used for being electrically connected with a cutterhead driving motor of the shield tunneling machine to be maintained; the AC380V frequency converter is used for being electrically connected with a gear oil pump of the shield tunneling machine to be maintained; the contactor is electrically connected with a brake hydraulic pump, the brake hydraulic pump is electrically connected with a brake control mechanism, and the brake control mechanism is used for being connected with a brake executing mechanism of the shield tunneling machine to be maintained. The dynamic maintenance method can dynamically maintain the cutter head driving system of the shield tunneling machine to be maintained, and has the advantages of being high in maintenance efficiency and low in energy consumption.

Description

Technical Field

[0001] The invention relates to the field of shield machine maintenance, and in particular to a dynamic maintenance control system for a shield machine cutter head drive system. Background Art

[0002] Shield machines are used in the construction of tunnel projects such as subways, highways, railways, and nuclear power. When shield machines are stored vertically for a long time, the cutter drive system needs to be maintained. The cutter drive system is the cutter drive bearing in the gear box and the gear mechanism it drives. The gear box needs to be filled with lubricating oil to maintain the cutter drive bearing and gear mechanism inside to prevent the cutter drive bearing and gear from rusting. At present, the power of the main cutter drive motor in medium and large diameter shield machines of 9 meters and above is between 250 and 350KW, with a rated voltage of AC690V. The main cutter drive motor adopts a triangle connection method and requires a 690V voltage to operate. However, the mains voltage is AC380~400V, which cannot directly drive the cutter drive motor of the shield machine to operate, and thus the gear mechanism and cutter drive bearing in the gear box cannot be maintained. Summary of the invention

[0003] The purpose of the present invention is to provide a dynamic maintenance control system for a shield machine cutter head drive system, so as to solve the problem of how to perform dynamic maintenance on the cutter head drive system of a shield machine that is stored vertically for a long time.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is: a dynamic maintenance control system for a shield machine cutter head drive system, comprising a circuit breaker, an isolation step-up transformer and an AC690V inverter connected to the power grid in sequence, a programmable logic controller connected to the circuit breaker, the programmable logic controller is electrically connected to an operation panel, an AC380V inverter, a contactor and the AC690V inverter, the AC690V inverter is used to be electrically connected to the cutter head drive motor of the shield machine to be maintained; the AC380V inverter is used to be electrically connected to the gear oil pump of the shield machine to be maintained; the contactor is electrically connected to a brake hydraulic pump, the brake hydraulic pump is electrically connected to a brake control mechanism, and the brake control mechanism is used to be connected to the brake actuator of the shield machine to be maintained.

[0005] Furthermore, the dynamic maintenance control system of the shield machine cutter drive system provided by the present invention also includes a pressure sensor installed on the brake control mechanism, and the pressure sensor is electrically connected to the programmable logic controller.

[0006] Furthermore, the dynamic maintenance control system of the shield machine cutter head drive system provided by the present invention also includes a flow sensor installed on the gear oil pump, and the flow sensor is electrically connected to the programmable logic controller.

[0007] Furthermore, in the dynamic maintenance control system of the shield machine cutter drive system provided by the present invention, the operation panel is a touch screen.

[0008] Furthermore, the present invention provides a dynamic maintenance and control system for the shield machine cutter drive system, wherein the circuit breaker, isolation step-up transformer, AC690V inverter, programmable logic controller, operation panel, AC380V inverter, contactor, brake hydraulic pump, and brake control mechanism are integrated in a control cabinet.

[0009] Furthermore, in the dynamic maintenance control system of the shield machine cutter drive system provided by the present invention, the AC690V inverter and the AC380V inverter are a plurality of matching quantities, and one AC690V inverter and one AC380V inverter form a group.

[0010] Furthermore, in the dynamic maintenance control system of the shield machine cutter drive system provided by the present invention, the brake control mechanism is a solenoid valve.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present invention provides a dynamic maintenance control system for the cutter head drive system of a shield machine. An operation panel issues a control instruction to a programmable logic controller. The programmable logic controller controls the operation of a brake hydraulic pump through a contactor to trigger a brake control mechanism to operate the brake actuator of the shield machine to be maintained, so that the cutter head drive system of the shield machine to be maintained is in a brake-released state. The programmable logic controller also controls the gear oil pump through an AC380V frequency converter to inject lubricating oil into the gear box of the shield machine to be maintained. The programmable logic controller controls the operation of the cutter head drive motor of the shield machine to be maintained through an AC690V frequency converter, so that the cutter head drive bearing and the gear mechanism in the gear box of the shield machine to be maintained are driven by the cutter head drive motor to operate under the action of the lubricating oil and drive the cutter head to rotate, thereby dynamically maintaining the cutter head drive system of the shield machine to be maintained.

[0013] The present invention provides a dynamic maintenance control system for a cutter head drive system of a shield machine. The isolation step-up transformer can step up the grid voltage of 380V to 690V to meet the driving voltage requirement of the cutter head drive system of the shield machine. The cutter head drive motor of the shield machine is driven by an AC690V inverter, and the gear oil pump is driven by an AC380V inverter, so as to achieve the purpose of speed regulation and energy saving. The brake actuator of the shield machine to be maintained is controlled by a programmable logic controller, a contactor, a brake hydraulic pump, and a brake control mechanism, so that the cutter head drive system of the shield machine to be maintained can be put in a brake release state, so as to avoid the purpose of being unable to perform dynamic maintenance due to the brake not being released. The brake hydraulic pump is controlled by a contactor, so as to have the advantages of strong current breaking capability, rapid action, safe operation, frequent operation, remote control, arc elimination, etc.

[0014] The dynamic maintenance control system of the shield machine cutter disc drive system provided by the present invention controls the cutter disc drive motor of the shield machine to be maintained by an AC690V frequency converter, controls the gear oil pump of the shield machine to be maintained by an AC380V frequency converter, and controls the brake actuator of the shield machine to be maintained by adding a contactor, a brake hydraulic pump, and a brake control mechanism, thereby avoiding the involvement of components irrelevant to the cutter disc drive system of the shield machine to be maintained, reducing the correlation with other components, avoiding the operation and maintenance of the entire shield machine to be maintained, and having the advantage of reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a block diagram of the dynamic maintenance control system of the shield machine cutter head drive system and its connection with the shield machine cutter head drive system to be maintained;

[0016] Figure 2 It is a schematic diagram of the structure of the control cabinet;

[0017] As shown in the figure:

[0018] 100. Power grid;

[0019] 200. Dynamic maintenance control system of shield machine cutter drive system, 201. Circuit breaker, 202. Isolation step-up transformer, 203. AC690V inverter, 204. Programmable logic controller, 205. Operation panel, 206. AC380V inverter, 207. Contactor, 208. Brake hydraulic pump, 209. Brake control mechanism, 210. Pressure sensor, 211. Flow sensor, 212. Control cabinet;

[0020] 300. Tunnel boring machine to be maintained, 301. Cutterhead drive motor, 302. Gear oil pump, 303. Gear box, 304. Cutterhead, 305. Brake actuator. DETAILED DESCRIPTION

[0021] The present invention is described in detail below in conjunction with the accompanying drawings: The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0022] Please refer to Figure 1 to Figure 2 The embodiment of the present invention provides a shield machine cutter drive system dynamic maintenance control system 200, comprising a circuit breaker 201, an isolation step-up transformer 202 and an AC690V inverter 203 connected to a power grid 100 in sequence, a programmable logic controller 204 connected to the circuit breaker 201, and the programmable logic controller 204 is electrically connected to an operation panel 205, an AC380V inverter 206, a contactor 207 and the AC690V inverter 203, and the AC The 690V inverter 203 is used to be electrically connected to the cutter head drive motor 301 of the shield machine 300 to be maintained; the AC380V inverter 206 is used to be electrically connected to the gear oil pump 302 of the shield machine 300 to be maintained; the contactor 207 is electrically connected to the brake hydraulic pump 208, and the brake hydraulic pump 208 is electrically connected to the brake control mechanism 209, and the brake control mechanism 209 is used to be connected to the brake actuator 305 of the shield machine 300 to be maintained. The operation panel 205 can be a touch screen, and the brake control mechanism 209 can be a solenoid valve.

[0023] The shield machine cutter drive system dynamic maintenance control system 200 provided by the embodiment of the present invention, the isolation step-up transformer 202 can step up the 380V grid 100 voltage to 690V to meet the drive voltage requirement of the shield machine cutter drive system, and the capacity of the isolation step-up transformer 202 can be 420KVA. The use of the isolation step-up transformer 202 can ensure safety and reliability; the cutter drive motor 301 of the shield machine can be driven by an AC690V inverter 203 such as a 400KW / AC690V heavy-duty inverter, so as to retain sufficient redundancy to drive the operation of the cutter drive motor 301. The cutter drive motor 301 is driven by the AC690V inverter 203, and the gear oil pump 302 is driven by the AC380V inverter 206, so as to achieve the purpose of speed regulation and energy saving; by The programmable logic controller 204, the contactor 207, the brake hydraulic pump 208, and the brake control mechanism 209 control the brake actuator 305 of the shield machine 300 to be maintained, so that the cutter head drive system of the shield machine 300 to be maintained is in a brake-released state, thereby avoiding the purpose of dynamic maintenance that cannot be performed when the brakes are not released; the brake hydraulic pump 208 is controlled by the contactor 207, which has the advantages of strong current-breaking capability, rapid action, safe operation, frequent operation, remote control, and arc elimination.

[0024] In the shield machine cutter head drive system dynamic maintenance control system 200 provided by the embodiment of the present invention, the operation panel 205 issues a control instruction to the programmable logic controller 204, and the programmable logic controller 204 controls the brake hydraulic pump 208 to operate through the contactor 207 to trigger the brake control mechanism 209 to operate the brake actuator 305 of the shield machine 300 to be maintained so that the cutter head drive system of the shield machine 300 to be maintained is in a brake-released state. The programmable logic controller 204 also controls the gear oil pump 302 to inject lubricating oil into the gear box of the shield machine 300 to be maintained through the AC380V inverter 206. The programmable logic controller 204 controls the cutter head drive motor 301 of the shield machine 300 to be maintained through the AC690V inverter 203 to operate, so that the cutter head drive bearing and the gear mechanism in the gear box of the shield machine 300 to be maintained are driven by the cutter head drive motor 301 to operate under the action of the lubricating oil and drive the cutter head to rotate, thereby dynamically maintaining the cutter head drive system of the shield machine 300 to be maintained.

[0025] The dynamic maintenance control system 200 of the shield machine cutter head drive system provided in the embodiment of the present invention controls the cutter head drive motor 301 of the shield machine 300 to be maintained through the AC690V frequency converter 203, controls the gear oil pump 302 of the shield machine 300 to be maintained through the AC380V frequency converter 206, and controls the brake actuator 305 of the shield machine 300 to be maintained by adding a contactor 207, a brake hydraulic pump 208, and a brake control mechanism 209, thereby avoiding the participation of components unrelated to the cutter head drive system of the shield machine 300 to be maintained, reducing the correlation with other components, avoiding the operation and maintenance of the entire shield machine 300 to be maintained, and having the advantage of reducing energy consumption.

[0026] Please refer to Figure 1 The shield machine cutter head drive system dynamic maintenance control system 200 provided in the embodiment of the present invention further includes a pressure sensor 210 installed on the brake control mechanism 209, and the pressure sensor 210 is electrically connected to the programmable logic controller 204. The pressure value on the brake control mechanism 209 is monitored by the pressure sensor 210 and fed back to the programmable logic controller (PLC) 204 and displayed on the operation panel 205, so as to judge whether the cutter head drive system of the maintenance shield machine 300 is in a brake release state by observing the pressure value.

[0027] Please refer to Figure 1In order to detect whether the gear oil pump 302 is operating normally, the shield machine cutter head drive system dynamic maintenance control system 200 provided by the embodiment of the present invention further includes a flow sensor 211 installed on the gear oil pump 302, and the flow sensor 211 is electrically connected to the programmable logic controller 204. By monitoring the flow value of the gear oil pump 302 and displaying it on the operation panel 205, it is determined whether the gear oil pump 302 is operating normally.

[0028] Please refer to Figure 2 In order to avoid electric shock and ensure safety, the shield machine cutter drive system dynamic maintenance control system 200 provided by the embodiment of the present invention, the circuit breaker 201, the isolation step-up transformer 202, the AC690V inverter 203, the programmable logic controller 204, the operation panel 205, the AC380V inverter 206, the contactor 207, the brake hydraulic pump 208, and the brake control mechanism 209 are integrated in a control cabinet 212.

[0029] Please refer to Figure 1 In the shield machine cutter drive system dynamic maintenance control system 200 provided by the embodiment of the present invention, the AC690V inverter 203 and the AC380V inverter 206 are a plurality of matching quantities, one AC690V inverter 203 and one AC380V inverter 206 form a group, and each group of AC690V inverter 203 and AC380V inverter 206 is used to connect with a shield machine 300 to be maintained to achieve the purpose of dynamic maintenance of the cutter drive system of the corresponding shield machine 300 to be maintained.

[0030] The shield machine cutter head drive system dynamic maintenance control system 200 provided in the embodiment of the present invention is universal and can perform dynamic maintenance on the cutter head drive systems of shield machines 300 to be maintained with different diameter specifications.

[0031] In the shield machine cutter drive system dynamic maintenance control system 200 provided by the embodiment of the present invention, the programmable logic controller 204 can read the current, torque, gear oil pump 302 operating current, gear oil flow, brake actuator 305 opening brake (i.e. brake) and other parameters of the AC690V inverter and AC380V inverter, and display them on the operation panel 205. At the same time, the motor overcurrent protection value is set on the operation panel 205 according to the rated current of different motors. When the set value is reached or exceeded during the rotation process, the system stops and issues an alarm to protect the main drive from damage.

[0032] The shield machine cutter head drive system dynamic maintenance control system 200 provided in the embodiment of the present invention has the function of controlling the gear oil pump. The cutter head can rotate only when the gear oil pump operates normally and the lubricating oil flow rate is satisfied.

[0033] The dynamic maintenance control system 200 of the shield machine cutter head drive system provided by the embodiment of the present invention solves the problems that the voltage level is insufficient to directly drive the cutter head drive motor 301 of the shield machine 300 to be maintained, the gear oil pump 302 of the shield machine 300 to be maintained does not operate to the required lubricating oil flow, and the brake (brake) is opened. The pressure is insufficient and the cutter head cannot rotate; important parameters in the maintenance process are monitored in real time through the operation panel 205; the motor overcurrent protection value is set to prevent damage to the main drive; the entire system is universal for shield machines of all sizes and is convenient for transfer and transportation to various regions, which can save a lot of manpower and material resources and improve maintenance efficiency.

[0034] The present invention is not limited to the above-mentioned specific implementation modes. Obviously, the above-mentioned embodiments are only some embodiments of the embodiments of the present invention, but not all embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention. Those skilled in the art can make other levels of modifications and changes to the present invention. In this way, if these modifications and changes of the present invention fall within the scope of the claims of the present invention, the present invention is also intended to include these changes and changes.

Claims

1. A shield machine cutter drive system dynamic maintenance control system, characterized in that: It includes a circuit breaker, an isolation step-up transformer and an AC690V frequency converter connected to the power grid in sequence, a programmable logic controller connected to the circuit breaker, the programmable logic controller is electrically connected to an operation panel, an AC380V frequency converter, a contactor and the AC690V frequency converter, the AC690V frequency converter is used to be electrically connected to a cutter head drive motor of a shield machine to be maintained; the AC380V frequency converter is used to be electrically connected to a gear oil pump of the shield machine to be maintained; the contactor is electrically connected to a brake hydraulic pump, the brake hydraulic pump is electrically connected to a brake control mechanism, and the brake control mechanism is used to be connected to a brake actuator of the shield machine to be maintained.

2. The shield machine cutter drive system dynamic maintenance control system according to claim 1, characterized in that: It also includes a pressure sensor installed on the brake control mechanism, and the pressure sensor is electrically connected to the programmable logic controller.

3. The shield machine cutter drive system dynamic maintenance control system according to claim 1, characterized in that: The invention also comprises a flow sensor installed on the gear oil pump, wherein the flow sensor is electrically connected to the programmable logic controller.

4. The shield machine cutter drive system dynamic maintenance control system according to claim 2, characterized in that: The operation panel is a touch screen.

5. The shield machine cutter drive system dynamic maintenance control system according to claim 1, characterized in that: The circuit breaker, isolation step-up transformer, AC690V frequency converter, programmable logic controller, operation panel, AC380V frequency converter, contactor, brake hydraulic pump and brake control mechanism are integrated in a control cabinet.

6. The shield machine cutter drive system dynamic maintenance control system according to claim 1, characterized in that: The AC690V inverter and the AC380V inverter are a plurality of inverters with matching numbers, and one AC690V inverter and one AC380V inverter form a group.

7. The shield machine cutter drive system dynamic maintenance control system according to claim 1, characterized in that: The brake control mechanism is a solenoid valve.

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