CN103628560A - Flow cutoff control device with memory function and flow cutoff control method thereof - Google Patents

Abstract

The invention relates to a shut-off control device and method with a memory function, which is automatically and accurately controlled based on a PLC system, and is composed of an intelligent control box, a driving device, an electric gate, and a water level gauge, wherein the input end of the intelligent control box is connected to the water level gauge , the output terminal of the intelligent control box is connected with the driving device, and the driving device is connected with the electric gate to drive the opening and closing of the electric gate, and the water level meter, flow meter and online water quality detector can be used alone or in combination, and it is implemented according to the specific area situation to install. When the water level gauge detects the signal, the signal is fed back to the automatic control box, and the signal is converted, analyzed and calculated in the automatic control box, and then the command signal is issued, and the PLC system of the automatic control box automatically controls the operation and stop of the drive device according to the feedback signal. Furthermore, the driving device drives the opening and closing of the electric gate, so that the size of the interception flow can be precisely controlled, thereby reducing the pollution to the environment, and the rainwater that meets the usage standard after interception can be used as a resource.

Description

A cut-off control device and control method with memory function

technical field

The invention belongs to the technical fields of urban drainage systems and environmental protection, and in particular relates to a flow closure control device based on a PLC system and having a memory function.

Background technique

With the continuous development of urbanization, the problem of initial pollution caused by urban rainwater runoff has become increasingly prominent. At present, the initial rainfall runoff in cities and towns is generally intercepted into sewage pipes by building interception wells and interceptor pipes, and transported to sewage treatment plants for treatment. Therefore, the interception well is the key facility for the pollution control of initial rainfall runoff. In practice, the existing interception wells control the initial rainwater interception flow by either using the overflow weir to control the water level, or using mechanical devices such as float valves for semi-natural control, neither of which can accurately control the interception flow of the initial rainfall runoff , especially the pollution degree of the initial rainfall runoff cannot be accurately controlled, which may not only lead to the increase of the diameter of the interceptor and sewage pipes and the increase of the sewage treatment capacity, resulting in unnecessary economic investment, but also may lead to the inability to pollute the initial rainfall runoff. be effectively controlled.

Contents of the invention

In order to make the interception well realize the precise control of the initial rainfall runoff interception volume, especially the precise control according to the initial rainfall runoff pollution degree (such as the concentration of suspended solids, etc.), the present invention proposes a PLC-based interception system with memory function. control method.

The technical scheme adopted in the present invention is:

A cut-off control device with a memory function is composed of an intelligent control box, a driving device, an electric valve, a water level gauge, a flow meter and/or an online water quality detector. The water level gauge is arranged at the highest water level position in the interception well to detect the water level signal in the interception well; the shutoff valve is arranged in the interception pipe in the interception well to close or open the interception pipe; the flowmeter and/or the online water quality detector is set Below the preset water level. The intelligent control box adopts a PLC system, its input end is connected to the signal output end of the water level gauge (or online water quality detector), its output end is connected to the driving device, and the driving device is connected to the shut-off valve to drive the opening and closing of the electric valve . When the signal is fed back to the intelligent control box, when the water level meter flowmeter and/or the online water quality detector detects the signal, the intelligent control box will send a command signal after the signal conversion analysis and calculation by the PLC system to control the operation and stop of the driving device, and then The opening and closing of the electric valve is driven by the driving device, so that the shut-off flow can be precisely controlled.

The present invention further provides a method of using the above cut-off control device with memory function to carry out cut-off control, comprising the following steps:

(1) The water level, flow or/and water quality signal in the interception well is detected by the water level meter, flow meter or/and online water quality detector, and the signal is fed back to the PLC system of the intelligent control box;

(2) Signal processing is carried out by the PLC system, the process is as follows:

A. When the water level reaches the system preset water level or the flow rate reaches the system preset flow rate, the arrival time t ₁ automatically recorded by the PLC system is the same as the last time the rainfall record meets the system preset water level Compared with the time t ₂ when the line requirement or the system sets the flow requirement, the number of dry days t _D is calculated, that is, t _D =t ₁ -t ₂ , and compared with the preset number of dry days T _D set by the PLC system.

B1. If the number of drought days t _D calculated by the system is less than the preset number of drought days T _{D is set,} that is, t _D <T _{D is set} , or the detection value S _measured by the online water quality detector does not reach the system water quality set value S _{is set} . S _measurement < S _design , the PLC system sends a command signal to control the driving device to close the shut-off valve of the shut-off well.

B2. If the calculated number of dry days t _D reaches the set number of dry days T _{D is set} , that is, t _D ≥ T _{D is set} , or the online water quality detector detects that the water quality S _measured reaches the system water quality set value S _set , that is, S _measured ≥ S _set , the PLC system controls the driving device to realize the opening of the shut-off valve of the shut-off well.

B21. With the continuous discharge of rainwater through the interceptor pipe, the PLC system continuously compares the water quality signal detection value S _measured by the online water quality detector with the preset system water quality set value S _set , when the water quality value S detected value S As soon as _{the measurement} is lower than the system setting value S _setting , that is, S _measurement < S _setting , the PLC system sends out a command signal to control the driving device to close the shut-off valve of the interception well.

Or, B22, with the continuous discharge of rainwater through the intercepting pipe, when the PLC system judges that the intercepting time t _I or the intercepting amount Q _I reaches the preset intercepting time T _I or the intercepting amount Q _{I, that is} , t _I ≥ T _I When _set or Q _I ≥ _{Q I is set} , the PLC system issues an instruction to control the driving device to close the shut-off valve of the shut-off well.

Or, B23, if the rainfall runoff time or flow of the whole rainfall is less than the system's preset closure time or closure volume, the PLC system will not detect the rainwater signal or flow before the preset closure time or closure volume is reached Signal, the PLC system will issue instructions through the signal fed back by the water level gauge, and control the driving device to close the shut-off valve of the shut-off well.

C. If the water level gauge detects that the water level in the interception well reaches the set maximum water level, the PLC system will issue an instruction to open the interception valve to the maximum through the drive device or send a remote warning signal.

With the method of the present invention, for the interception well in the traditional diversion system drainage system, an overflow weir control valve is also arranged between the rainwater inlet pipe in the well and the overflow or jumping rainwater discharge pipe, and the PLC system closes the interception valve at the same time , to control the opening of the overflow weir control valve; when the water level reaches the highest water level, the PLC system must control the shut-off valve and the overflow weir control valve to open simultaneously.

For the rainwater and sewage double-layer composite inspection wells in the "rainwater and sewage double-layer composite inspection well" (ZL200910104453.8), the opening size of the interception hole is set according to the specific interception volume or the water quality to be intercepted. When the water level exceeds the maximum water level of the inspection well, the intelligent control box can send out a remote warning signal. When no rain signal (or flow signal) is detected, the electric valve can be converted to a predetermined state according to the instructions issued by the intelligent control box.

The advantage of the interception control device and method compared with the existing interception control method is that it can be associated with the change characteristics of the initial rainfall runoff over time in a specific area, and the precise control of the interception amount can be realized according to the pollution degree of the initial rainfall runoff, and the The organic unity of interception and pollution control realizes the best combination of economical practicality and environmental friendliness of initial rainfall runoff pollution control.

Description of drawings

Fig. 1 is a structural schematic diagram of a skip well (interception well) used in the present invention for the initial rainfall runoff control of the current traditional diversion system.

Figure 2 is a schematic diagram of the structure (parallel single-layer pipes) of the present invention used in the "rainwater and sewage double-layer composite inspection well" (ZL200910104453.8) double-layer composite inspection well.

Figure 3 is a schematic diagram of the structure (double-layer pipe) of the present invention used in the "rainwater, sewage double-layer composite inspection well" (ZL200910104453.8) double-layer composite inspection well.

Fig. 4 is a schematic diagram of the structure of the double-layer composite inspection well (intersecting single-layer pipes) used in the "rainwater and sewage double-layer composite inspection well" (ZL200910104453.8) of the present invention.

Fig. 5 is a schematic diagram of the working flow of the device of the present invention.

In the figure, 1 is the manhole cover, 2 is the shut-off well, 3 is the water level meter or flow meter, 4 is the online water quality monitor, 5 is the intelligent control box (PLC system), 6 is the driving device, 71 is the shut-off valve, 72 is the overflow Weir control valve, 8 is an upstream rainwater pipe, 9 is a downstream rainwater pipe, 10 is an intercepting pipe, 11 is an upstream sewage pipe, 12 is a downstream sewage pipe, 13 is an intercepting plate, and 14 is an intercepting hole.

Detailed ways

Embodiment one:

Refer to Figure 1 and Figure 5 for the form of the jumping well (interception well) used for the initial rainfall runoff control of the current traditional diversion system. The control device consists of a water level meter or flow meter 3, an online water quality detector 4, and an intelligent control box. 5. The driving device 6 is composed of the shut-off valve 71 and the overflow weir control valve 72, in which the water level meter or flow meter 3 and the line water quality detector 4 are installed in the interception well 2, and the intelligent control box 5 and the driving device 6 are installed in the well cover 1 superior.

The water level gauge or flowmeter 3 and the line water quality detector 4 can be used alone or in conjunction with each other, and are installed according to the implementation conditions in specific areas. The working process is: the water level meter or flow meter 3 and the online water quality detector 4 detect the signal and then transmit it to the intelligent control box 5. The analysis and calculation in the intelligent control box 5 are compared with the set value and the value is automatically recorded. The system controls the driving device 6 to realize the automatic opening and closing of the shut-off valve 7, so as to achieve the purpose of precisely controlling the shut-off volume.

The specific control method is as follows:

During the rainfall process, with the increase of water volume, when the water level reaches the preset water level line a or the flow rate reaches the system set flow rate (the water level or flow rate can be set according to needs), the water level gauge (or flow meter) 3 will generate a water level The signal or flow signal is transmitted to the intelligent control box 5, and the time _t1 automatically recorded by the intelligent control box is compared with the time _t2 when the last rainfall record meets the requirement of the set water level line a or the system set flow requirement analysis, automatically calculate the number of dry days t _D (ie t _D =t ₁ -t ₂ ), and compare it with the preset number of dry days in the intelligent control box, if the analysis calculates the number of dry days t _D (such as 2 days) is less than The pre-set number of drought days T _{D set} (such as 3 days) that is t _D < T _{D set} or the online water quality detector detection value S _measurement does not reach the system water quality set value S _set that S _measurement < S _set (system water quality set value It can be set according to the environmental requirements and standards of the specific area), the command signal is sent through the PLC system of the intelligent control box 5, and the driving device 6 is automatically controlled by the PLC system to realize the closing of the shut-off valve 71 of the sewage pipe, the opening of the overflow weir control valve 72, and the rainwater Directly flow out through the downstream rainwater pipeline 9; when the analysis calculates that the number of dry days t _D (such as 4 days) reaches the set number of dry days T _D (such as 3 days), that is, t _D ≥ _{T D is set} or the online water quality detector detects the water quality When the S _measurement reaches the system water quality setting value S setting, that _is , S _measurement ≥ S _setting , the PLC system of the intelligent control box 5 automatically controls the driving device 6 to realize the opening of the shut-off valve 71, the overflow weir control valve 72 is closed, and the rainwater is discharged through the interception pipe 10 At the same time, the online water quality detector 4 (such as SS water quality detector) detects the rainwater quality online. Because the rainwater has a scouring effect, as the rainwater is continuously discharged through the interceptor, the rainwater quality gradually improves. When the water quality _value S is just lowered to the system setting When the value S _{is set} (for example, the water quality value is set according to the first-class B standard), that is, S _measurement < S _setting , the online water quality detector 4 generates a water quality signal, which is input to the intelligent control box 5 for conversion analysis and calculation to obtain S _measurement , and is compared with the preset value. The set value S of the system water quality _{is set} for comparison and analysis, and an instruction signal is issued to automatically control the drive device 6 through the PLC system to close the shut-off valve 71, open the overflow weir control valve 72, and the remaining rainwater flows out through the downstream rainwater pipeline 9; or when the analysis and calculation When the number of dry days t _D (such as 4 days) reaches the set number of dry days T _D (such as 3 days), that is, when t _D ≥ T _{D is set} , the water inflow is detected by the water level meter 3 (or flow meter 3), and the sending The signal is sent to the intelligent control box 5, and the signal is converted and analyzed through the intelligent control box 5, and the command signal is issued, and the drive device 6 is automatically controlled by the PLC system to open the shut-off valve 71, close the overflow weir control valve 72, and discharge the rainwater through the shut-off pipe 10. When the cut-off time t _I or the cut-off amount Q _I reach the preset cut-off time T _I or the cut-off _amount Q _I respectively, that is, t _I ≥ _{T I set} or Q _I ≥ Q _{I set} , the intelligent control box 5 sends an instruction to pass The PLC system automatically controls the driving device 6 to realize pollution interception The valve 71 is closed, the overflow weir control valve 72 is opened, and the remaining rainwater flows out through the downstream rainwater pipeline 9 . If the rainfall runoff time or flow rate of the entire rainfall is less than the system's preset closure time or closure volume, the PLC system will not detect the rain signal or flow signal before the preset closure time or closure volume is reached. Smart The control box 5 sends an instruction through the signal fed back by the water level gauge 3 to automatically control the drive device 6 through the PLC system to close the shut-off valve 71 and open the overflow weir control valve 72 .

If the water level in the interception well reaches the highest water level line b, the water level signal fed back by the water level gauge 3 received in the intelligent control box 5 will automatically issue an instruction, and the two valves will be automatically opened through the drive device 6 or a remote early warning signal will be sent. Troubleshoot.

Embodiment two:

This interception control device is used in the parallel single-layer pipe type "rainwater and sewage double-layer composite inspection well" (ZL200910104453.8). The structure of the double-layer composite inspection well refers to Figure 2 and Figure 5, and the water level gauge 3 (or flow meter) , online water quality detector 4, intelligent control box 5, driving device 6 and shut-off valve 71, in which the water level gauge 3 (or flow meter) and the online water quality detector 4 can be used alone or in combination, and are installed according to the implementation conditions of specific regions . Its working process is the same as that of the first embodiment.

During the rainfall process, with the increase of water volume, when the water level reaches the preset water level line a or the system set flow rate (the water level or flow rate can be set according to needs), the water level meter (or flow meter) 3 generates a water level signal or flow rate The signal is transmitted to the intelligent control box 5, and the time _t1 automatically recorded by the intelligent control box is compared with the last time _t2 of the last rainfall record to meet the requirement of the preset water level a or the flow requirement of the system, and the automatic Calculate the number of dry days t _D (ie t _D =t ₁ -t ₂ ), and compare it with the preset number of dry days in the intelligent control box. If the analysis calculates the number of dry days t _D (such as 2 days) is less than the preset The number of drought days T _{D is set} (such as 3 days) that is, t _D < T _{D set} or the online water quality detector detection value S test does not reach the system water quality set _value S _set that S _test < S _set (the system water quality setting value can be determined according to the specific According to the regional environmental requirements and standards), the command signal is issued from the intelligent control box 5, and the shut-off valve 71 is closed by the automatic control of the driving device 6 through the PLC system, and the rainwater directly flows out through the downstream rainwater pipeline 9 of the upper inspection well; The number of days t _D (such as 4 days) reaches the set number of dry days T _{D is set} (such as 3 days) that is, t _D ≥ T _{D set} or the online water quality detector detects the water quality S _measured to reach the system water quality set value S _{set that is} S _measured ≥ When S _{is set} , the PLC system of the intelligent control box 5 automatically controls the driving device 6 to realize the opening of the shut-off valve 71, and the opening size is controlled according to the required shut-off flow or the rainwater quality, and the rainwater to be shut-off passes through the shut-off hole 14 provided on the shut-off plate 13 It is discharged into the lower inspection well and discharged through the downstream sewage pipe 12. At the same time, the online water quality detector 4 (such as SS water quality detector) detects the rainwater quality online. Improvement, when the water quality value S _measured is just lowered to the system set value S _set (for example, the water quality value is set according to the first-level B standard), that is, S _measured < S _set , the online water quality detector 4 generates a water quality signal, which is input to the intelligent control box 5 for further improvement. S _measurement is obtained through conversion analysis and calculation, and compared with the preset system water quality setting value S _setting , an instruction signal is issued, and the shut-off valve 71 is closed by the automatic control of the PLC system through the drive device 6, and the remaining rainwater passes through the rainwater pipeline downstream of the upper inspection well 9 outflow; or when the analysis calculates that the number of dry days t _D (such as 4 days) reaches the set number of dry days T _D (such as 3 days), that is, t _D ≥ _{T D design} , it is detected by the water level gauge (or flow meter) 3 When the inflow of water begins, send a signal to the intelligent control box 5, convert and analyze the signal through the intelligent control box 5, send out an instruction signal, and automatically control the driving device 6 through the PLC system to realize the opening of the shut-off valve 71, and the rainwater is discharged into the lower layer through the shut-off hole 14 for inspection well and discharge through the downstream sewage pipe 12, when the interception time t _I or the interception amount Q _I reach the preset interception time T _I or the interception amount Q _{I respectively} , that is, t _I ≥ _{T I} or Q _I ≥ Q _I , intelligent control box 5 rounds The command is issued to automatically control the driving device 6 through the PLC system to close the shut-off valve 71, and the remaining rainwater flows out through the downstream rainwater pipeline 9 of the upper inspection well. If the rainfall runoff time or flow rate of the entire rainfall is less than the system's preset closure time or closure volume, the PLC system will not detect the rain signal or flow signal before the preset closure time or closure volume is reached. Smart The control box 5 sends an instruction through the signal fed back by the water level gauge 3 to automatically control the driving device 6 through the PLC system to close the shut-off valve 71 .

If the water level in the intercepting well reaches the highest water level line b, the water level signal fed back by the water level gauge 3 received in the intelligent control box 5 will automatically issue an instruction, and the shut-off valve 71 will be automatically opened to the maximum through the driving device 6 or a remote early warning signal will be sent. Conduct on-site inspections.

Embodiment three:

This interception control device is used for the double-layer pipe type "rainwater and sewage double-layer composite inspection well" (ZL200910104453.8). The structure of the double-layer composite inspection well is shown in Figure 3 and Figure 5. The water level gauge 3 (or flow meter), The online water quality detector 4, the intelligent control box 5, the driving device 6 and the shut-off valve 71 are composed, wherein the water level gauge 3 (or flow meter) and the online water quality detector 4 can be used alone or in combination, and are installed according to the implementation conditions of specific regions. Its working process is the same as that of the first embodiment.

During the rainfall process, with the increase of water volume, when the water level reaches the preset water level line a or the system set flow rate (the water level or flow rate can be set according to the needs), the water level gauge (or flow meter) 3 will generate a water level signal or The flow signal is transmitted to the intelligent control box 5, and the time _t1 automatically recorded by the intelligent control box is compared with the time _t2 when the last rainfall record meets the preset water level a requirement or the flow requirement set by the system , automatically calculate the number of dry days t _D (ie t _D =t ₁ -t ₂ ), and compare it with the preset number of dry days T _D in the intelligent control box, if the analysis calculates the number of dry days t _D (such as 2 days ) is less than the preset number of drought days T _{D set} (such as 3 days) that is, t _D < T _{D set} or online water quality detector detection value S _measurement does not reach the system water quality set value S _set that S _measurement < S _set (system water quality The setting value can be set according to the environmental requirements and standards of the specific area), and the command signal is issued from the intelligent control box 5, and the drive device 6 is automatically controlled by the PLC system to close the shut-off valve 71, and the rainwater directly passes through the upper layer rainwater of the downstream double-layer pipeline of the upper inspection well The pipeline 9 flows out; when the analysis calculates that the number of dry days t _D (such as 4 days) reaches the set number of dry days T _D (such as 3 days), that is, t _D ≥ _{T D is set} or the online water quality detector detects that the water quality S _{is measured} and reaches the system When the water quality setting value S _{is set,} that is, when S _{is measured} ≥ S _{is set} , the PLC system of the intelligent control box 5 automatically controls the driving device 6 to realize the opening of the shut-off valve 71. The opening size is controlled according to the required interception flow or rainwater quality, and the rainwater to be intercepted passes through The interception hole 14 provided on the interception plate 13 is discharged into the lower inspection well and discharged through the lower sewage pipe 12 of the downstream double-layer pipeline. At the same time, the online water quality detector 4 (such as SS water quality detector) detects the rainwater quality online. Because the rainwater has a scouring effect, With the continuous discharge of rainwater through the intercepting pipe, the rainwater quality gradually improves. When the water quality value S _measurement just drops to the system setting value S _setting (such as setting the water quality value according to the first-level B standard), that is, S _measurement < S _setting , the online water quality The detector 4 generates a water quality signal, which is input into the intelligent control box 5 for conversion analysis and calculation to obtain S _measurement , and compares and analyzes it with the preset system water quality setting value S, _sends out a command signal, and automatically controls the driving device 6 through the PLC system to realize flow closure The valve 71 is closed, and the remaining rainwater flows out through the upper rainwater pipeline 9 of the double-layer pipeline downstream of the upper inspection well; or when the analysis and calculation of the number of dry days t _D (such as 4 days) reaches the set number of dry days T _D (such as 3 days) that is t When _D ≥ T _{D is set} , the water level meter 3 (or flow meter 3) detects the start of water inflow, sends a signal to the intelligent control box 5, converts and analyzes the signal through the intelligent control box 5, sends a command signal, and automatically controls it through the PLC system The driving device 6 realizes the opening of the shut-off valve 71, and the rainwater is discharged into the lower inspection well through the shut-off hole ₁₄ and discharged through the lower sewage pipe ₁₂ of the downstream double-layer pipeline. _{I set} or intercept flow Q _{I setting is} t _I ≥ T _{I setting} or Q _I ≥ Q _{I setting} , the intelligent control box 5 sends an instruction to automatically control the driving device 6 through the PLC system to close the shut-off valve 71, and the remaining rainwater passes through the upper layer of the downstream double-layer pipeline of the upper inspection well The rainwater pipe 9 flows out. If the rainfall runoff time or flow rate of the entire rainfall is less than the system's preset closure time or closure volume, the PLC system will not detect the rain signal or flow signal before the preset closure time or closure volume is reached. Smart The control box 5 sends an instruction through the signal fed back by the water level gauge 3 to automatically control the driving device 6 through the PLC system to close the shut-off valve 71 .

If the water level in the intercepting well reaches the highest water level line b, the water level signal fed back by the water level gauge 3 received in the intelligent control box 5 will automatically issue an instruction, and the shut-off valve 71 will be automatically opened to the maximum through the driving device 6 or a remote early warning signal will be sent. Conduct on-site inspections.

Embodiment four:

This interception control device is used for the intersecting single-layer pipe type "rainwater and sewage double-layer composite inspection well" (ZL200910104453.8). The structure of the double-layer composite inspection well is shown in Figure 4 and Figure 5. The water level gauge 3 (or flow meter) , online water quality detector 4, intelligent control box 5, driving device 6 and shut-off valve 71, in which the water level gauge 3 (or flow meter) and the online water quality detector 4 can be used alone or in combination, and are installed according to the implementation conditions of specific regions . Its working process is the same as that of the first embodiment.

During the rainfall process, with the increase of water volume, when the water level reaches the preset water level line a or the system set flow rate (the water level or flow rate can be set according to the needs), the water level gauge (or flow meter) 3 will generate a water level signal or The flow signal is transmitted to the intelligent control box 5, and the time _t1 automatically recorded by the intelligent control box is compared with the time _t2 when the last rainfall record meets the preset water level a requirement or the flow requirement set by the system , automatically calculate the number of dry days t _D (ie t _D =t ₁ -t ₂ ), and compare it with the preset number of dry days T _D in the intelligent control box, if the analysis calculates the number of dry days t _D (such as 2 days ) is less than the preset number of drought days T _{D set} (such as 3 days) that is, t _D < T _{D set} or online water quality detector detection value S _test does not reach the system water quality set value S _set that S _test < S _set (system water quality The set value can be set according to the environmental requirements of the specific area), and the command signal is issued through the intelligent control box 5, and the drive device 6 is automatically controlled by the PLC system to close the shut-off valve 71, and the rainwater directly flows out through the rainwater pipeline 9 downstream of the upper inspection well; When the analysis calculates that the number of dry days t _D (such as 4 days) reaches the set number of dry days T _{D set} (such as 3 days), that is, t _D ≥ T _{D set} or the online water quality detector detects the water quality S _and reaches the system water quality setting value S When _{the setting is} S _measurement ≥ S _setting , the PLC system of the intelligent control box 5 automatically controls the driving device 6 to realize the opening of the shut-off valve 71, and the opening size is controlled according to the required shut-off flow or the rainwater quality, and the rainwater to be shut-off passes through the shut-off plate 13 The set interception hole 14 is discharged into the lower inspection well and discharged through the downstream sewage pipe 12. At the same time, the online water quality detector 4 (such as SS water quality detector) detects the rainwater quality online. discharge, and the rainwater quality is gradually improved. When the water quality value S _measured has just dropped to the system set value S _set (such as the water quality value is set according to the first-level B standard), that is, S _measured < S _set , the online water quality detector 4 generates a water quality signal, input The intelligent control box 5 performs conversion analysis and calculation to obtain the S _measurement , and _compares and analyzes it with the preset system water quality setting value S, sends out an instruction signal, and automatically controls the driving device 6 through the PLC system to close the shut-off valve 71, and the remaining rainwater passes through the upper layer. Check the outflow of the rainwater pipeline 9 downstream of the well; or when the analysis calculates that the number of dry days t _D (such as 4 days) reaches _{the set number of dry days T D} (such as 3 days), that is, t _D ≥ _{T D design} , through the water level gauge 3 ( Or the flow meter 3) detects the start of water inflow, sends a signal to the intelligent control box 5, converts and analyzes the signal through the intelligent control box 5, sends out a command signal, and automatically controls the driving device 6 through the PLC system to open the shut-off valve 71, and the rainwater passes through the shut-off The hole 14 is discharged into the inspection well of the lower layer and discharged through the downstream sewage pipe 12. When the interception time t _I or the interception amount Q I reach the preset interception time T _I or the interception amount Q _I respectively _{, that} is, t _I ≥ _{T I} or When Q _I ≥Q _{I is set} , The intelligent control box 5 issues instructions to automatically control the driving device 6 through the PLC system to close the shut-off valve 71, and the remaining rainwater flows out through the downstream rainwater pipeline 9 of the upper inspection well. If the rainfall runoff time or flow rate of the entire rainfall is less than the system's preset closure time or closure volume, the PLC system will not detect the rain signal or flow signal before the preset closure time or closure volume is reached. Smart The control box 5 sends an instruction through the signal fed back by the water level gauge 3 to automatically control the driving device 6 through the PLC system to close the shut-off valve 71 .

If the water level in the intercepting well reaches the highest water level line b, the water level signal fed back by the water level gauge 3 received in the intelligent control box 5 will automatically issue an instruction, and the shut-off valve 71 will be automatically opened to the maximum through the driving device 6 or a remote early warning signal will be sent. Conduct on-site inspections.

Claims (8)

1. the control device that dams with memory function, is characterized in that: it comprises intelligent control box, drive unit, shutoff valve, water-level gauge, and described water-level gauge is arranged on peak level line position in catchpit, detects the water level signal in catchpit; Described shutoff valve is arranged in the interior intercepting sewer of catchpit, closes or open intercepting sewer; Described intelligent control box adopts PLC system, and its input connects the signal output part of water-level gauge, and its output is connected with drive unit, and drive unit is connected with shutoff valve, to drive the keying of shutoff valve; During water level signal in water-level gauge detects catchpit, PLC system by signal feedback to intelligent control box, after carrying out signal conversion and calculate in PLC system, send command signal, the operation of automatically controlled actuating device with stop, and then by drive unit, drive the keying of shutoff valve, thereby accurately control the size of the amount of damming.

2. the control device that dams with memory function according to claim 1, it is characterized in that: in described catchpit, be also provided with flow meter and/or online water quality testing meter, they are arranged on the waterline that sets in advance with upper/lower positions, and their signal end is all connected with the input of intelligent control box.

3. the control device that dams with memory function according to claim 2, it is characterized in that: for catchpit or the jump well of traditional separated drainage system, also between the rainwater water inlet pipe in well and the storm drain road of overflow or jump, be provided with overflow weir control valve, it is also connected with drive unit, by PLC system, is controlled.

4. the method that the control device that dams with memory function described in employing claim 1,2 or 3 dams and controls, is characterized in that comprising the following steps:

(1) by water-level gauge, flow meter or/and online water quality testing meter water level in catchpit, flow detected or/and water quality signal, the PLC system by signal feedback to intelligent control box;

(2) by PLC system, carry out signal processing, process is as follows:

A, when water level arrives the predefined waterline of system or flow and reaches the predefined flow of system, the time t that PLC system is self registering while reaching ₁, with last time rainfall record meet for the last time that the predefined waterline of system requires or time t during default traffic requirement ₂contrast, calculate arid number of days t _d, i.e. t _d=t ₁-t ₂, and with the predefined arid number of days T of PLC system _{d establishes}contrast;

If B1 is the arid number of days t that this time system-computed goes out _dbe less than predefined arid number of days T _{d establishes}be t _d< T _{d if}, or online water quality testing meter detected value S _surveydo not reach system water quality setting value S _ifbe S _survey< S _if, PLC system is sent command signal, and accessory drive is realized the shutoff valve of catchpit and is closed;

If B2 calculates arid number of days t _dreach the arid number of days T of setting _{d establishes}be t _d>=T _{d establishes}time, or online water quality testing meter detects water quality S _surveyreach system water quality settings S _ifbe S _survey>=S _iftime, PLC system accessory drive is realized the shutoff valve of catchpit and is opened;

B21, along with rainwater is by the continuous discharge of intercepting sewer, the water quality value detection signal S that PLC system constantly produces online water quality testing meter _surveywith predefined system water quality setting value S _ifcontrast, as water quality value detected value S _surveyjust be reduced to default value S _ifbe below S _survey< S _iftime, PLC system is sent command signal, and accessory drive is realized the shutoff valve of catchpit and is closed;

Or, B22, along with rainwater is by the continuous discharge of intercepting sewer, when PLC system is judged the time t that dams _ior the amount of damming Q _ireach the predefined time T of damming _{i establishes}or the amount of damming Q _{i establishes}be t _i>=T _{i establishes}or Q _i>=Q _{i establishes}time, PLC system is sent the shutoff valve that instruction accessory drive carries out catchpit and is closed;

Or, if rainfall runoff time or the flow of whole rainfall of B23 are less than predefined time or the amount of damming of damming of system, before also reaching predefined dam time or the amount of damming, PLC system just not can't detect rainwater signal or flow signal, PLC system is sent instruction by the signal feeding back by water-level gauge, and accessory drive is realized the shutoff valve of catchpit and closed;

If when C water-level gauge detects the peak level height that in catchpit, water level arrival is set, PLC system is sent instruction, by drive unit, open shutoff valve to maximum or send distant early warning signal.

5. the control method of damming according to claim 3, is characterized in that: for catchpit or the jump well of traditional separated drainage system, PLC system, when shutoff valve cuts out, controlling water kick valve to open; When water level reaches peak level height, PLC system will control shutoff valve and overflow weir control valve is opened simultaneously.

6. the control method of damming according to claim 3, is characterized in that: the unlatching size of the cutoff hole of rain sewage two-layer compound manhole maybe needs the water quality of damming to arrange according to the concrete amount of damming.

7. the control method of damming with memory function according to claim 3, is characterized in that: when water level surpasses manhole maximum stage, intelligent control box can be sent distant early warning signal.

8. the control method of damming with memory function according to claim 3, is characterized in that: when can't detect rainwater signal or flow signal, the instruction that motor operated valve can send according to PLC system is transformed into predetermined state.

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