An automatic control device for outer circulating water of shield machine

Abstract

The present application relates to the field of tunnel construction equipment, and specifically discloses an automatic control device for outer circulating water of a shield machine, which includes a circulating pool, a water supply component, a water return component and a controller. The circulating pool includes a first sedimentation part and a second sedimentation part. The circulating pool is used to precipitate the accumulated water. The water supply component includes a water pump and a water supply pipe. The water supply component transports the water in the circulating pool from the water supply pipe to the shield machine through the water pump. The water return component is used to collect the accumulated water. The controller is used to control the operation of the water pump. The present application has the effect of improving the problem that the accumulated water at the construction site is difficult to recover during tunnel operation.

Description

Technical Field

[0001] The present application relates to the field of tunnel construction equipment, and in particular to an automatic control device for external circulating water of a shield machine. Background Art

[0002] In modern tunnel engineering, shield machines, as a highly efficient excavation equipment, are widely used in the construction of underground projects such as subways, hydropower stations, roads and railways. During the excavation process, shield machines generate a lot of heat due to cutting rocks and soil. At the same time, in order to reduce dust, keep the tunnel wall moist, and prevent cracks in the tunnel wall due to dryness, water needs to be continuously sprayed on the excavation face.

[0003] However, in the existing shield machine operation process, the water spraying method is usually an open design, and the sprayed water is directly discharged into the tunnel. There is a lack of an effective recovery mechanism, which easily leads to the accumulation of salt and other minerals remaining in the tunnel after the water evaporates, which in turn causes corrosion of the tunnel wall and equipment, affecting the quality and service life of the project. In addition, there is no equipment or device that can control the water flow during the water spraying process, which makes it easy for water to accumulate on the construction site, increasing the safety risk of construction and affecting the progress of construction. Utility Model Content

[0004] In order to improve the problem of difficulty in recovering accumulated water at the construction site during tunnel operations, the present application provides an automatic control device for external circulating water of a shield machine.

[0005] The present application provides a shield external circulating water automatic control device adopts the following technical solution:

[0006] A shield external circulating water automatic control device, comprising

[0007] A circulation pool, comprising a first sedimentation part and a second sedimentation part, wherein the first sedimentation part is connected to the second sedimentation part;

[0008] A water supply assembly, comprising a water pump and a water supply pipe, one end of the water supply pipe is connected to the second sedimentation part, one end of the water supply pipe away from the second sedimentation part is used to communicate with the shield machine, and the water pump is connected to the water supply pipe;

[0009] A water return assembly, comprising a water tank and a valve, wherein the water tank is communicated with the first sedimentation part, and the valve is arranged in the water tank;

[0010] A controller is connected to a power source, and the controller is electrically connected to the water pump and the valve.

[0011] By adopting the above technical scheme, the water supply component can transport the water in the circulation pool to the shield machine through the water pump and the water supply pipe to ensure stable water supply during the operation of the shield machine; the water tank of the return water component provides a return path for the water at the construction site, which improves the problem that the water at the construction site is difficult to recycle during tunnel operation, and ensures that the water at the construction site can be smoothly returned to the circulation pool; the valve of the return water component can adjust the return water volume according to actual needs to ensure the stability of the water level in the circulation pool; the first sedimentation part of the circulation pool can preliminarily separate the larger particles of impurities in the water recycled to the circulation pool, and the second sedimentation part can further process finer particles, ensuring the cleanliness of the water and improving the reuse value of water resources; the controller can control the water pump and the valve by being electrically connected to the water pump and the valve.

[0012] Preferably, the water supply assembly is further provided with a first pressure sensing module, the first pressure sensing module is connected to the water supply pipe, the first pressure sensing module is electrically connected to the controller, and the first pressure sensing module is located on a side of the water pump away from the circulation pool.

[0013] By adopting the above technical solution, the first pressure sensing module can obtain the water pressure in the water supply pipe, so that the controller can adjust the operating state of the water pump according to the water pressure in the water supply pipe, ensuring that the water pressure is maintained within a certain range; and in abnormal circumstances, such as pressure drop caused by pipeline leakage or blockage, the first pressure sensing module can monitor the changes in water pressure, thereby avoiding the risk of possible construction interruption.

[0014] Preferably, the first pressure sensing module is specifically a water pressure sensor, and the first pressure sensing module is connected to the water supply pipe through a pipeline.

[0015] By adopting the above technical solution, the first pressure sensor is a water pressure sensor, and the first pressure sensor is connected to the water supply pipe through a pipeline, so that the first pressure sensor can directly contact the water flow and obtain a more accurate water pressure reading, thereby facilitating the monitoring of the water pressure during the construction of the shield machine.

[0016] Preferably, the water supply component is further provided with a flow sensor module, the flow sensor module is connected to the water supply pipe, the flow sensor module is electrically connected to the controller, and the flow sensor module is arranged between the first pressure sensor module and the water pump.

[0017] By adopting the above technical solution, during the construction process, flow anomalies caused by pipeline leakage or blockage can be captured immediately by the flow sensor module, which is convenient for operators to adjust or shut down the water pump in time during the construction process, prevent damage to construction equipment, and reduce the occurrence of construction accidents.

[0018] Preferably, the flow sensing module is specifically a liquid flow meter, and the flow sensing module is connected to the water supply pipe and the water pump.

[0019] By adopting the above technical solutions, the flow sensing module improves the transparency and controllability of the water supply process, allowing operators to understand the current flow status in real time and make adjustments according to construction needs. Secondly, the real-time monitoring capability of the flow meter allows operators to take timely measures when the flow is abnormal to avoid construction interruptions or equipment damage. Finally, the precise measurement of the liquid flow meter helps to optimize the efficiency of water resource use, reduce waste, and achieve the dual goals of economy and environmental protection.

[0020] Preferably, it further comprises a maintenance component, wherein the maintenance component comprises a water pipe and a nozzle, the water pipe is connected to the water supply pipe, and the nozzle is connected to the water pipe.

[0021] By adopting the above technical solution, the water pipe can transport the water in the circulation pool to the nozzle, and the nozzle can spray the water onto the tunnel surface to ensure that the cement-cast wall surface remains moist, effectively reducing the risk of cracks caused by rapid drying of the cement wall surface, and promoting uniform hardening of the cement, thereby improving the density and durability of the tunnel wall surface.

[0022] Preferably, the maintenance component also includes a solenoid valve and a second pressure sensing module, the solenoid valve is arranged between the water pipe and the nozzle, the solenoid valve is connected to the water pipe and the nozzle, the solenoid valve is electrically connected to the controller, the second pressure sensing module is connected to the water pipe, and the second pressure sensor is electrically connected to the controller.

[0023] By adopting the above technical solution, the second pressure sensing module can obtain the pressure changes of the water flow in the water pipe, and the solenoid valve can adjust the water spray pressure according to the different maintenance requirements of the tunnel wall to avoid affecting the maintenance effect due to excessive or low pressure.

[0024] Preferably, the circulation pool is provided with a sewage outlet, the sewage outlet is equipped with a mud discharge valve, and the mud discharge valve is electrically connected to the controller.

[0025] By adopting the above technical solution, the mud discharge valve can be opened to discharge the mud and other sediments accumulated at the bottom of the circulation pool out of the system, thereby maintaining the cleanliness of the circulating water and the normal operation of the system.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The water supply component can transport the water in the circulation pool to the shield machine through the water pump and the water supply pipe to ensure stable water supply during the operation of the shield machine; the water tank of the return water component provides a return path for the water at the construction site, which improves the problem that the water at the construction site is difficult to recycle during tunnel operation, and ensures that the water at the construction site can be smoothly returned to the circulation pool; the valve of the return water component can adjust the return water volume according to actual needs to ensure the stability of the water level in the circulation pool; the first sedimentation part of the circulation pool can preliminarily separate the larger particles of impurities in the water recycled to the circulation pool, and the second sedimentation part can further process finer particles, ensuring the cleanliness of the water and improving the reuse value of water resources; the controller can realize the control of the water pump and the valve by being electrically connected to the water pump and the valve;

[0028] 2. The first pressure sensing module can obtain the water pressure in the water supply pipe, so that the controller can adjust the operation state of the water pump according to the water pressure in the water supply pipe to ensure that the water pressure is maintained within a certain range; and in abnormal circumstances, such as pressure drop caused by pipeline leakage or blockage, the first pressure sensing module can monitor the change of water pressure, thereby avoiding the risk of possible construction interruption;

[0029] 3. The first pressure sensor is a water pressure sensor, and the first pressure sensor is connected to the water supply pipe through a pipeline, so that the first pressure sensor can directly contact the water flow and obtain a more accurate water pressure reading, thereby facilitating the monitoring of the water pressure during the construction of the shield machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the shield external circulating water automatic control device in the embodiment of the present application;

[0031] Figure 2 It is a schematic diagram of the structure of the circulation pool in the embodiment of the present application;

[0032] Figure 3 is a schematic structural diagram of a water supply assembly in an embodiment of the present application;

[0033] Figure 4 It is a schematic diagram of the structure of the water return assembly in the embodiment of the present application;

[0034] Figure 5 It is a schematic diagram of the structure of the maintenance component in the embodiment of the present application.

[0035] Explanation of the reference numerals: 1. Circulation pool; 11. First sedimentation section; 12. Second sedimentation section; 2. Water supply assembly; 21. Water pump; 22. Water supply pipe; 23. First pressure sensing module; 24. Flow sensing module; 3. Return water assembly; 31. Water tank; 32. Valve; 33. Branch; 34. Temporary storage tank; 4. Maintenance assembly; 41. Solenoid valve; 42. Second pressure sensing module; 43. Water pipe; 44. Nozzle; 5. Mud discharge valve; 6. Shield machine. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-5 This application is described in further detail.

[0037] During the tunnel excavation process, the shield machine 6 generates a lot of heat when cutting rocks and soil, so it is necessary to continuously spray water on the excavation face; at the same time, in order to reduce dust and prevent cracks in the tunnel wall due to dryness, it is also necessary to continuously spray water on the excavation face.

[0038] The present application embodiment discloses an automatic control device for external circulating water of a shield machine (hereinafter referred to as a circulating water device). Figure 1 The circulating water device includes a circulating pool 1, a water supply component 2, a return water component 3, a controller and a maintenance component 4.

[0039] like Figure 2 and Figure 3 As shown, the circulation pool 1 is arranged outside the tunnel, and the circulation pool 1 is separated into a first sedimentation section 11 and a second sedimentation section 12. The first sedimentation section 11 and the second sedimentation section 12 are connected by a pipeline. The first sedimentation section 11 is used to accommodate and settle turbid accumulated water containing a large amount of suspended particles, silt and other impurities that flows back from the working face of the shield machine 6, and preliminarily separates large particles of solid impurities to prevent these impurities from entering the subsequent treatment process, thereby protecting the water pump 21, pipelines and nozzles 44 and other equipment from wear or blockage; the first sedimentation section 11 and the second sedimentation section 12 achieve a smooth transition of water flow through a connecting structure; the second sedimentation section 12 further processes the water passing through the first sedimentation section 11, removes finer particles and impurities through a more detailed sedimentation and filtration process, and converts the accumulated water into circulating water, thereby ensuring that the accumulated water at the construction site can be recycled, and ensuring the cleanliness and reuse value of the circulating water, thereby improving the problem that the accumulated water at the construction site is difficult to recycle during tunnel operations.

[0040] The circulating pool 1 is provided with a sewage outlet, and a mud discharge valve 5 is installed at the sewage outlet. In the embodiment of the present application, two sewage outlets and two mud discharge valves 5 are provided, and the two sewage outlets are respectively located on the side walls of the first sedimentation part 11 and the second sedimentation part 12. The two mud discharge valves 5 are respectively arranged in the corresponding sewage outlets, and the two mud discharge valves 5 are respectively connected with the first sedimentation part 11 and the second sedimentation part 12; the mud and other impurities deposited at the bottom of the circulating pool 1 can be discharged from the system through the two mud discharge valves 5 to maintain the cleanliness of the water quality in the circulating pool 1, and ensure the reuse efficiency of the circulating water and the water supply stability during the construction process.

[0041] It should be noted that the muddy water and other sediments discharged from the circulation pool 1 need to be rendered harmless in subsequent treatment, including but not limited to treatment by physical sedimentation and / or chemical flocculation, so as to avoid pollution to the environment and ensure the safety and cleanliness of the water and soil around the construction area.

[0042] like Figure 4 As shown, the water return assembly 3 includes a water tank 31 and a valve 32 . The water tank 31 is connected to the first sedimentation part 11 , and the valve 32 is disposed in the water tank 31 .

[0043] Specifically, the water trough 31 extends to the first sedimentation part 11 in the tunnel, and the side wall of the water trough 31 is arranged with an inclined surface, so that the accumulated water in the tunnel can enter the water trough 31 and flow along the water trough 31 to the first sedimentation part 11, and the valve 32 is arranged on the side of the water trough 31 close to the first sedimentation part 11, so that the speed and flow rate of the accumulated water flowing into the first sedimentation part 11 can be controlled by opening or closing the valve 32, so that the accumulated water in the water trough 31 can enter the sedimentation part at an appropriate flow rate, promote the sedimentation of solid particles such as mud and sand, and improve the sedimentation efficiency; the water trough 31 of the return water component 3 provides a return path for the accumulated water at the construction site, improves the problem of water being difficult to recycle at the construction site during tunnel operations, and ensures that the water at the construction site can smoothly flow back to the circulation pool 1; the valve 32 of the return water component 3 can adjust the return water volume according to actual needs to ensure the water level of the circulation pool 1 is stable.

[0044] In the embodiment of the present application, a branch 33 is further provided at one end of the water trough 31 close to the first sedimentation part 11. The branch 33 of the water trough 31 is connected to a pre-set temporary storage pool 34, and the valve 32 is specifically a three-way regulating valve; during the excavation of the shield machine 6, if a relatively moist stratum is encountered, more groundwater may be generated, resulting in an increase in the accumulation of water in the water trough 31. At this time, the accumulated water can be introduced from the branch 33 of the water trough 31 into the temporary storage pool 34 through the valve 32 to balance the fluctuation of the water volume in the circulation pool 1, reduce the impact on the circulation pool 1 during peak periods, and ensure that the circulation pool 1 can stably handle the accumulated water.

[0045] like Figure 3As shown, the water supply assembly 2 includes a water pump 21, a water supply pipe 22, a first pressure sensing module 23 and a flow sensing module 24. One end of the water supply pipe 22 is connected to the second sedimentation part 12, and the end of the water supply pipe 22 away from the second sedimentation part 12 is used to communicate with the shield machine 6. The water pump 21 is connected to the water supply pipe 22, and the first pressure sensing module 23 is connected to the water supply pipe 22 through a pipeline. The first pressure sensing module 23 is located on the side of the water pump 21 away from the circulation pool 1. The first pressure sensing module 23 is specifically a water pressure sensor. The flow sensing module 24 is arranged between the first pressure sensing module 23 and the water pump 21, and the flow sensing module 24 is connected to the water supply pipe 22. The flow sensing module 24 is specifically a liquid flow meter.

[0046] In an embodiment of the present application, the water pump 21 extracts circulating water from the second sedimentation section 12 and passes the circulating water through a flow sensor and obtains the current flow, so that the operating personnel can understand the current flow status in real time, which is convenient for taking timely measures when the flow is abnormal. For example, when the flow is abnormal due to pipeline leakage or blockage, the operating personnel can adjust or shut down the water pump 21 in time to prevent damage to the construction equipment; then the first pressure sensing module 23 obtains the water pressure reading by directly contacting the water flow, and monitors the water pressure of the shield machine 6 during construction. Under abnormal circumstances, such as pressure drop caused by pipeline leakage or blockage, the first pressure sensing module 23 can monitor the change in water pressure, thereby avoiding the risk of possible construction interruption, and finally monitor the water pressure and flow of the circulating water in the water supply pipe 22 to ensure stable water supply during operation of the shield machine 6.

[0047] like Figure 5 As shown, the maintenance component 4 includes a water pipe 43, a nozzle 44, a solenoid valve 41 and a second pressure sensing module 42. The water pipe 43 is connected to the water supply pipe 22, the nozzle 44 is connected to the water pipe 43, the solenoid valve 41 is arranged between the water pipe 43 and the nozzle 44 and is connected to the water pipe 43, and the second pressure sensing module 42 is connected to the water pipe 43; the second pressure sensing module 42 is specifically a water pressure sensor.

[0048] In the embodiment of the present application, the water pipe 43 can transport the water in the circulation pool 1 to the nozzle 44, and the nozzle 44 can spray water onto the tunnel surface to ensure that the cement-cast wall surface remains moist, effectively reducing the risk of cracks in the cement wall surface due to rapid drying, and promoting uniform hardening of cement, thereby improving the density and durability of the tunnel wall surface; the second pressure sensing module 42 can obtain the pressure change of the water flow in the water pipe 43, and the solenoid valve 41 can adjust the water spraying pressure according to the different maintenance requirements of the tunnel wall surface to avoid affecting the maintenance effect due to excessively high or low pressure.

[0049] In order to enable the circulating water device to supply water to the shield machine 6 according to actual construction needs, the circulating water device is equipped with a controller, which is arranged in a control cabinet. The controller is electrically connected to the valve 32, the water pump 21, the first pressure sensing module 23, the flow sensing module 24, the second pressure sensing module 42 and the solenoid valve 41, respectively, to control the valve 32, the water pump 21, the first pressure sensing module 23, the flow sensing module 24, the second pressure sensing module 42 and the solenoid valve 41; in the embodiment of the present application, the controller is specifically an STM32F103 single-chip microcomputer.

[0050] Specifically, the controller is configured to obtain water pressure data in the water supply pipe 22 through the first pressure sensing module 23, and generate a first instruction based on the water pressure data in the water supply pipe 22 and send it to the water pump 21, so that the water pump 21 increases the rotation frequency according to the first instruction to increase the water pressure in the water supply pipe 22.

[0051] The controller is also configured to obtain water pressure data in the water supply pipe 22 through the first pressure sensing module 23, and generate a second instruction based on the water pressure data in the water supply pipe 22 and send it to the water pump 21, so that the water pump 21 increases the rotation frequency according to the second instruction to reduce the water pressure in the water supply pipe 22.

[0052] The controller is also configured to obtain flow data in the water supply pipe 22 through the flow sensor module 24, and generate a third instruction based on the flow data in the water supply pipe 22 and send it to the water pump 21, so that the water pump 21 stops running when the flow in the water supply pipe 22 drops to zero, thereby avoiding the situation where the circulating water system continues to supply water to the shield machine 6 when the shield machine 6 stops running.

[0053] The controller is also configured to obtain flow data in the water supply pipe 22 through the flow sensor module 24, and generate a fourth instruction based on the flow data in the water supply pipe 22 and send it to the valve 32, so that the valve 32 opens when the flow in the water supply pipe 22 is not zero, thereby preventing the circulating water system from flowing out due to the valve 32 not being opened when the shield machine 6 is working.

[0054] The controller is also configured to obtain water pressure data in the water pipe 43 through the second pressure sensing module 42, and generate a fifth instruction based on the water pressure data in the water pipe 43 and send it to the solenoid valve 41, so that the solenoid valve 41 increases its opening, thereby increasing the coverage area of ​​the water spray from the nozzle 44, ensuring that the concrete wall surface in the tunnel is evenly and sufficiently moistened.

[0055] The controller is also configured to obtain water pressure data in the water pipe 43 through the second pressure sensing module 42, and generate a sixth instruction based on the water pressure data in the water pipe 43 and send it to the solenoid valve 41 to reduce the opening of the solenoid valve 41, thereby reducing the coverage area of ​​the water spray from the nozzle 44 and avoiding excessive water dispersion to unnecessary areas.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A shield external circulating water automatic control device, characterized in that: include: A circulation pool (1) comprises a first sedimentation portion (11) and a second sedimentation portion (12), wherein the first sedimentation portion (11) is connected to the second sedimentation portion (12); A water supply assembly (2), comprising a water pump (21) and a water supply pipe (22), one end of the water supply pipe (22) being in communication with the second sedimentation portion (12), one end of the water supply pipe (22) being away from the second sedimentation portion (12) being used for communicating with a shield machine (6), and the water pump (21) being in communication with the water supply pipe (22); A water return assembly (3), comprising a water tank (31) and a valve (32), wherein the water tank (31) is connected to the first sedimentation part (11), and the valve (32) is arranged in the water tank (31); A controller is connected to a power source, and the controller is electrically connected to the water pump (21) and the valve (32).

2. The shield external circulating water automatic control device according to claim 1 is characterized in that: The water supply assembly (2) is also provided with a first pressure sensing module (23), the first pressure sensing module (23) is connected to the water supply pipe (22), the first pressure sensing module (23) is electrically connected to the controller, and the first pressure sensing module (23) is located on a side of the water pump (21) away from the circulation pool (1).

3. The shield external circulating water automatic control device according to claim 2 is characterized in that: The first pressure sensing module (23) is specifically a water pressure sensor, and the first pressure sensing module (23) is connected to the water supply pipe (22) through a pipeline.

4. The shield external circulating water automatic control device according to claim 3 is characterized in that: The water supply component (2) is also provided with a flow sensor module (24), the flow sensor module (24) is connected to the water supply pipe (22), the flow sensor module (24) is electrically connected to the controller, and the flow sensor module (24) is arranged between the first pressure sensor module (23) and the water pump (21).

5. The shield machine external circulating water automatic control device according to claim 4 is characterized by: The flow sensing module (24) is specifically a liquid flow meter, and the flow sensing module (24) is in communication with the water supply pipe (22) and the water pump (21).

6. The shield external circulating water automatic control device according to claim 1 is characterized by: It also includes a maintenance component (4), the maintenance component (4) includes a water pipe (43) and a nozzle (44), the water pipe (43) is connected to the water supply pipe (22), and the nozzle (44) is connected to the water pipe (43).

7. The shield machine external circulating water automatic control device according to claim 6 is characterized by: The maintenance component (4) further comprises a solenoid valve (41) and a second pressure sensing module (42); the solenoid valve (41) is arranged between the water pipe (43) and the nozzle (44); the solenoid valve (41) is in communication with the water pipe (43) and the nozzle (44); the solenoid valve (41) is electrically connected to the controller; the second pressure sensing module (42) is connected to the water pipe (43); and the second pressure sensing module (42) is electrically connected to the controller.

8. The shield machine external circulating water automatic control device according to claim 7 is characterized by: The circulation pool (1) is provided with a sewage outlet, and the sewage outlet is equipped with a mud discharge valve (5).

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