Anti-blocking structure, anti-blocking device for sewage discharge of shield machine and application thereof

Abstract

A blocking prevention structure, a shield machine sewage blocking prevention device and application thereof, the sewage blocking prevention device comprising a blocking prevention structure, a clean water source, a booster pump, a solenoid valve, a sewage pipe, a lower computer and an upper computer; the blocking prevention structure has a sewage inlet and a high-pressure water interface, and the sewage inlet is connected to a sewage pipe; the clean water source, the booster pump, the solenoid valve, and the high-pressure water interface of the blocking prevention structure are connected in sequence, and the blocking prevention structure is connected to the sewage pipe; the lower computer is connected to the booster pump and the upper computer respectively; an blocking prevention structure, the blocking prevention structure comprising a three-way joint, a jet pipe and a flange arranged in sequence from front to back, the three-way joint having a sewage inlet and a high-pressure water interface, and the high-pressure water interface and the jet pipe are arranged in a straight line; the inner diameter of the high-pressure water interface gradually decreases from front to back; the present invention has the functions of enhancing the fluidity and slag discharge capacity of sewage, and may solve the problem that sewage pipes are easily blocked during current construction, resulting in damage to sewage pumps.

Description

Technical Field

[0001] The invention relates to shield machine accessories, in particular to an anti-blocking structure, a shield machine sewage discharge anti-blocking device and applications thereof. Background Art

[0002] As a special equipment for urban subway construction, shield machines are adopted by more and more construction units. A common problem faced during the construction process is sewage discharge, especially in water-bearing strata, and there is also the risk of water inrush, so timely sewage discharge is very important. At present, conventional shield machines are equipped with sewage discharge equipment such as Figure 1 As shown, it only includes a pneumatic sewage pump 1' and a check valve 2'. Since the sewage contains a lot of sediment and the sewage conveying pipeline is long, it often causes pipeline blockage or poor sewage discharge, resulting in abnormal pressure of the sewage pump and damage. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems in the above-mentioned technology to a certain extent. To this end, one object of the present invention is to provide a shield machine sewage discharge and anti-blocking device.

[0004] The second object of the present invention is to provide an anti-blocking structure.

[0005] The third object of the present invention is to propose an application of a shield machine sewage discharge and anti-blocking device.

[0006] To achieve the above-mentioned purpose, the first embodiment of the present invention proposes a shield machine sewage blocking prevention device, including a blocking prevention structure, a clean water source, a booster pump, a solenoid valve, a sewage pipe, a lower computer and an upper computer; the blocking prevention structure has a sewage inlet and a high-pressure water interface, and a sewage pipe is connected to the sewage inlet;

[0007] The clean water source, booster pump, solenoid valve, and high-pressure water interface of the anti-blocking structure are connected in sequence, and the anti-blocking structure is connected to the sewage pipe; the lower computer is connected to the booster pump and the solenoid valve respectively, and is used to control the opening / closing of the booster pump and the solenoid valve; the upper computer is connected to the lower computer, and the upper computer receives the signal fed back by the lower computer, issues an alarm and / or issues a control instruction to the lower computer.

[0008] Based on the above design, the present invention has flushing, pressurizing and speed increasing functions, can enhance the fluidity and slag discharge capacity of sewage, and solves the problem that sewage pipes are easily blocked during existing construction processes, leading to damage to sewage pumps.

[0009] In addition, the shield machine sewage discharge and anti-blocking device proposed in the above embodiment of the present invention may also have the following additional technical features:

[0010] It also includes a flow sensor, which is arranged on the sewage pipe and connected to the lower computer. The lower computer receives the flow signal of the flow sensor and reports it to the upper computer, and the upper computer issues an alarm or / and a control instruction to the lower computer. The flow sensor is used to detect the flow of sewage in the sewage pipe.

[0011] It also includes a pressure sensor, which is arranged between the booster pump and the solenoid valve, and is connected to a lower computer, which receives a pressure signal from the pressure sensor and reports it to an upper computer, which issues an alarm or / and a control instruction to the lower computer. The pressure sensor is used to detect the jet pressure.

[0012] It also includes an air source, a control ball valve, a pneumatic sewage pump, a check valve and sewage; the air source, the control ball valve, the pneumatic sewage pump and the sewage pipe are connected in sequence, and the check valve is arranged on the sewage pipe; the pneumatic sewage pump is connected to the sewage, and the control ball valve and the pneumatic sewage pump are respectively connected to the lower computer, and the lower computer controls the opening / closing of the control ball valve and the pneumatic sewage pump. The check valve is used to prevent sewage from flowing back when the pipeline is blocked to protect the pneumatic sewage pump.

[0013] To achieve the above-mentioned purpose, the second aspect of the embodiment of the present invention proposes an anti-blocking structure, including a three-way joint, a jet tube and a flange arranged in sequence from front to back, the three-way joint having a sewage inlet and a high-pressure water interface, the high-pressure water interface and the jet tube are arranged in a straight line; the inner diameter of the high-pressure water interface gradually decreases from front to back.

[0014] Based on the above design, the anti-blocking structure has a speed-increasing function, which can enhance the fluidity and slag discharge capacity of sewage.

[0015] To achieve the above-mentioned purpose, the third embodiment of the present invention proposes an application of a shield machine sewage discharge anti-blocking device, and uses the shield machine sewage discharge system to perform operations. During the sewage discharge operation, the lower computer receives the sewage flow signal fed back by the sewage flow and the pressure signal fed back by the pressure sensor in real time, and reports them to the upper computer. The upper computer issues an alarm or / and issues a control instruction to the lower computer based on the signal. The specific operation method is as follows:

[0016] The lower computer controls the ball valve to open, and the air source supplies air to the pneumatic sewage pump. The pneumatic sewage pump starts to work to pump the sewage in the water to the sewage pipe and flow into the anti-blocking structure, and then reaches the sewage pipe. The flow sensor detects the sewage flow in the sewage pipe and reports it to the lower computer in real time;

[0017] (1) When the flow rate of the flow sensor is greater than or equal to a preset value, the pneumatic sewage pump works, but the booster pump does not start;

[0018] (2) When the flow rate of the flow sensor is less than the preset value, the lower computer controls the booster pump to start, and the solenoid valve is energized to open.

[0019] The booster pump pressurizes the water in the clean water source and then jets it to the anti-blocking structure to dredge the pipeline, and then executes step (3) or (4);

[0020] (3) If the flow rate of the flow sensor reaches the preset value, the booster pump and the solenoid valve will be turned off after 10 minutes of stabilization;

[0021] (4) If the flow rate of the flow sensor does not reach the set value after starting the booster pump, and the pressure of the pressure sensor exceeds a preset value, the lower computer will simultaneously close the solenoid valve, control ball valve and booster pump, and the upper computer will issue an alarm to inspect the pipeline.

[0022] Based on the above design, through program control, when the pipeline is blocked, the solenoid valve, control ball valve and booster pump can be closed in time to dredge the pipeline to protect the pneumatic sewage pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the existing shield machine sewage discharge equipment;

[0024] Figure 2 It is a structural schematic diagram of a sewage discharge and anti-blocking device for a shield machine according to the present invention;

[0025] Figure 3 It is a structural schematic diagram of the anti-blocking structure in the present invention;

[0026] Figure 4 is a cross-sectional view of the anti-blocking structure of the present invention;

[0027] Figure 5 The present invention is a control principle block diagram of a sewage discharge and anti-blocking device for a shield machine. DETAILED DESCRIPTION

[0028] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0029] See also Figure 2 and Figure 5 , a shield machine sewage anti-blocking device, including an anti-blocking structure 1, a clean water source 2, a booster pump 3, a solenoid valve 4, a sewage pipe 5, a flow sensor 9, a pressure sensor 10, an air source 20, a control ball valve 21, a pneumatic sewage pump 23, a check valve 24, sewage 25, a lower computer 6 and an upper computer 7;

[0030] Please refer to Figure 2 , Figure 3 and Figure 4 The anti-blocking structure 1 includes a three-way joint 11, a jet pipe 12 and a flange 13 which are arranged in sequence from front to back. The anti-blocking structure 1 has a sewage inlet 111 and a high-pressure water interface 112, that is, the sewage inlet 111 and the high-pressure water interface 112 are both arranged on the three-way joint 11, and a sewage pipe 8 is connected to the sewage inlet 111; the high-pressure water interface 112 and the jet pipe 12 are arranged in a straight line, and the jet pipe 12 and the sewage pipe 5 are connected through the flange 13. The sewage inlet 111 and the high-pressure water interface 112 of the anti-blocking structure 1 are both connected by threads, which is convenient for disassembly and maintenance; the inner diameter of the jet pipe 12 gradually increases from the middle to the rear end. The inner diameter of the high-pressure water interface 112 gradually decreases from front to back, that is, the high-pressure water interface 112 is a nozzle type. By changing the diameter, the flushing water, which originally has a large flow and high pressure, can increase the injection speed again, and directly inject the sewage and mud coming in from the sewage inlet 111 into the jet pipe 12 without flowing into the sewage inlet 111, thereby realizing the long-distance transportation of sewage slurry.

[0031] Please refer to Figure 2 , the clean water source 2, the booster pump 3, the solenoid valve 4, and the high-pressure water interface 112 of the anti-blocking structure 1 are connected in sequence, and the anti-blocking structure 1 is connected to the sewage pipe 5; the flow sensor 9 is arranged on the sewage pipe 5, and the flow sensor 9 is used to detect the flow of sewage in the sewage pipe 5. The pressure sensor 10 is arranged between the booster pump 3 and the solenoid valve 4, the air source 20, the control ball valve 21, the pneumatic sewage pump 23 and the sewage pipe 8 are connected in sequence, and the check valve 24 is arranged on the sewage pipe 8; the pneumatic sewage pump 23 is connected to the sewage 25, and the control ball valve 21 and the pneumatic sewage pump 23 are respectively connected to the lower computer 6, and the lower computer 6 controls the opening / closing of the control ball valve 21 and the pneumatic sewage pump 23. The check valve 24 is used to prevent sewage from flowing back when the pipeline is blocked to protect the pneumatic sewage pump 23.

[0032] Please refer to Figure 2 and Figure 5 The upper computer 7 is connected to the lower computer 6, which is usually a programmable logic controller (PLC) single-chip computer. The lower computer 6 is respectively connected to the booster pump 3, the solenoid valve 4, the flow sensor 9, and the pressure sensor 10, and is used to control the opening / closing of the booster pump 3 and the solenoid valve 4, receive the flow signal of the flow sensor 9 and the pressure signal of the pressure sensor 10, and report them to the upper computer 7. The upper computer 7 receives the signal fed back by the lower computer 6, issues an alarm and / or issues a control instruction to the lower computer 6; the pressure sensor 10 is used to detect the jet pressure.

[0033] Please refer to Figure 2 and Figure 5 , an application of a shield machine sewage discharge anti-blocking device, using the shield machine sewage discharge system to operate, in the sewage discharge operation, the lower computer 6 receives the sewage flow signal fed back by the flow sensor 9 and the pressure signal fed back by the pressure sensor 10 in real time, and reports them to the upper computer 7, the upper computer 7 issues an alarm or / and issues a control instruction to the lower computer 6 according to the signal, the specific operation method is as follows:

[0034] The lower computer 6 controls the ball valve 21 to be powered on and open, and the air source 20 supplies air to the pneumatic sewage pump 23. The pneumatic sewage pump 23 starts to work to pump sewage to the sewage pipe 8 and flows into the anti-blocking structure 1, and then reaches the sewage pipe 5. The flow sensor 9 detects the sewage flow in the sewage pipe 5 and reports it to the lower computer 6 in real time;

[0035] (1) When the flow rate of the flow sensor 9 is greater than or equal to a preset value, the pneumatic sewage pump 23 works, but the booster pump 3 does not start;

[0036] (2) When the flow rate of the flow sensor 9 is less than the preset value, the lower computer 6 controls the booster pump 3 to start, the solenoid valve 4 is powered on and opened, the booster pump 3 draws clean water from the clean water source 2 and pressurizes it, and then jets it to the anti-blocking structure 1 to dredge the pipeline, and step (3) or (4) is executed;

[0037] (3) If the flow rate of the flow sensor 9 reaches the preset value, the booster pump 3 and the solenoid valve 4 are turned off after being stable for 10 minutes;

[0038] (4) If the flow rate of the flow sensor 9 does not reach the set value after starting the booster pump 3, and the pressure of the pressure sensor 10 exceeds a preset value, the pressure sensor 10 presets a maximum value for the jet pressure, the flow rate does not increase, but the pressure increases, indicating that the pipe is blocked and needs to be repaired. The lower computer 6 simultaneously closes the solenoid valve 4, the control ball valve 21 and the booster pump 3 to protect the pneumatic sewage pump 23; the upper computer 7 issues an alarm and manually repairs the pipeline.

[0039] The present invention has flushing, pressurizing and speed increasing structures to enhance the fluidity and slag discharge capacity of sewage, and may solve the problem that the sewage pipe 5 is easily blocked during the current construction process, resulting in damage to the sewage pump.

[0040] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0041] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An application of a shield machine sewage discharge and anti-blocking device, characterized in that: Operation is performed using a sewage discharge and blocking prevention device for a shield machine. The sewage discharge and blocking prevention device for a shield machine comprises a blocking prevention structure (1), a clean water source (2), a booster pump (3), a pressure sensor (10), a solenoid valve (4), a sewage pipe (5), a flow sensor (9), a lower computer (6) and an upper computer (7); the blocking prevention structure (1) comprises a sewage inlet (111) and a high-pressure water interface (112), and a sewage pipe (8) is connected to the sewage inlet (111); the blocking prevention structure (1) comprises a three-way joint (11), a jet pipe (12) and a flange (13) which are arranged in sequence from front to back; the sewage inlet (111) and the high-pressure water interface (112) are both arranged on the three-way joint (11), the high-pressure water interface (112) and the jet pipe (12) are arranged in a straight line, and the jet pipe (12) and the sewage pipe (5) are connected via the flange (13); the inner diameter of the high-pressure water interface (112) gradually decreases from front to back; The clean water source (2), the booster pump (3), the solenoid valve (4), and the high-pressure water interface (112) of the anti-blocking structure (1) are connected in sequence, and the anti-blocking structure (1) is connected to the sewage pipe (5); the lower computer (6) is connected to the booster pump (3) and the solenoid valve (4) respectively, and is used to control the opening / closing of the booster pump (3) and the solenoid valve (4); the upper computer (7) is connected to the lower computer (6), and the upper computer (7) receives the signal fed back by the lower computer (6), issues an alarm and / or issues a control instruction to the lower computer (6); The flow sensor (9) is arranged on the sewage pipe (5), and the flow sensor (9) is connected to the lower computer (6). The lower computer (6) receives the flow signal of the flow sensor (9) and reports it to the upper computer (7). The upper computer (7) issues an alarm and / or a control instruction to the lower computer (6). The pressure sensor (10) is arranged between the booster pump (3) and the solenoid valve (4), and the pressure sensor (10) is connected to the lower computer (6). The lower computer (6) receives the pressure signal of the pressure sensor (10) and reports it to the upper computer (7). The upper computer (7) issues an alarm and / or a control instruction to the lower computer (6). The shield machine sewage discharge and anti-blocking device further comprises an air source (20), a control ball valve (21), a pneumatic sewage pump (23), a check valve (24) and sewage (25); the air source (20), the control ball valve (21), the pneumatic sewage pump (23) and the sewage pipe (8) are connected in sequence, and the check valve (24) is arranged on the sewage pipe (8); the air source (20) and the sewage (25) are connected, the control ball valve (21) and the pneumatic sewage pump (23) are respectively connected to a lower computer (6), and the lower computer (6) controls the opening / closing of the control ball valve (21) and the pneumatic sewage pump (23); During the sewage discharge operation, the lower computer (6) receives in real time the sewage flow rate signal fed back by the sewage flow rate and the pressure signal fed back by the pressure sensor (10), and reports them to the upper computer (7). The upper computer (7) issues an alarm or / and a control instruction to the lower computer (6) based on the signal. The specific operation method is as follows: The lower computer (6) controls the control ball valve (21) to be powered on and opened, and the air source (20) supplies air to the pneumatic sewage pump (23). The pneumatic sewage pump (23) starts to work to pump sewage into the sewage pipe (8) and flow into the anti-blocking structure (1), and then reaches the sewage pipe (5). The flow sensor (9) detects the sewage flow in the sewage pipe (5) and reports it to the lower computer (6) in real time. A. When the flow rate of the flow sensor (9) is greater than or equal to a preset value, the pneumatic sewage pump (23) works, but the booster pump (3) does not start; B. When the flow rate of the flow sensor (9) is less than the preset value, the lower computer (6) controls the booster pump (3) to start, the solenoid valve (4) is energized to open, and the booster pump (3) pressurizes the water in the clean water source and then jets it to the anti-blocking structure (1) to clear the pipeline, and step C or D is executed; C. If the flow rate of the flow sensor (9) reaches the preset value, the booster pump (3) and the solenoid valve (4) are turned off after stabilization for 10 minutes; D. If the flow rate of the flow sensor (9) does not reach the set value after the booster pump (3) is started, and the pressure of the pressure sensor (10) exceeds a preset value, the lower computer (6) simultaneously closes the solenoid valve (4), the control ball valve (21) and the booster pump (3), and the upper computer (7) issues an alarm to inspect the pipeline.

2. The use of a shield machine sewage discharge and anti-blocking device as claimed in claim 1, characterized in that: The inner diameter of the jet tube (12) gradually increases from the middle portion to the rear end portion.

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