WO2023226901A1

WO2023226901A1 - Negative-pressure sewage relay station, and negative-pressure sewage collection system and control method thereof

Info

Publication number: WO2023226901A1
Application number: PCT/CN2023/095360
Authority: WO
Inventors: 陈云逸; 陈礼国; 张维
Original assignee: 上海在田环境科技有限公司; 江苏丰又环境科技有限公司
Priority date: 2022-05-21
Filing date: 2023-05-19
Publication date: 2023-11-30
Also published as: CN114922269B; CN114922269A

Abstract

The present invention relates to the technical field of sewage treatment. Disclosed are a negative-pressure sewage relay station, and a negative-pressure sewage collection system and a control method thereof. The sewage relay station mainly comprises a well body, wherein an upper portion and a lower portion of the well body are partitioned into a normal-pressure space and a negative-pressure space; the negative-pressure space is in communication with a water intake pipe, a water discharge pipe, a pressure relief pipe and a negative-pressure gas pipe; the water intake pipe is in communication with sewage collection wells; and the water discharge pipe and the negative-pressure gas pipe are respectively in communication with a negative-pressure sewage collection tank and a vacuum pump in a negative-pressure station. The relay station is used as a relay node to suck sewage from a plurality of sewage collection wells, such that the operation area of a single negative-pressure station can be effectively extended, thereby reducing the construction cost of a system. In addition, by means of coordinated control over negative-pressure relay stations, the working efficiency and reliability of a negative-pressure sewage collection system are improved while the operation cost of the whole system is reduced.

Description

Negative pressure sewage relay station, collection system and control method thereof

Technical field

The present invention relates to the technical field of sewage treatment, and more specifically, it relates to a negative pressure sewage relay station, a collection system and a control method thereof.

Background technique

With the continuous advancement of new rural construction and rural environmental improvement work, the harmless purification treatment of rural domestic sewage has received more and more attention. Different from the treatment method of urban domestic sewage, because rural households are geographically dispersed, the domestic sewage produced by them is also relatively scattered. It usually requires the use of corresponding collection systems to collect the sewage generated by various households in rural areas for centralized treatment.

At present, the treatment method of rural domestic sewage is roughly as follows: dig and build sewage collection wells near households' homes, use pipes to guide domestic sewage to the above-mentioned sewage collection wells, and realize solid-liquid conversion and solid-liquid separation of sewage in the above-mentioned sewage collection wells. , and then use negative pressure pipelines to pump the sewage in the above collection wells into the negative pressure station, and finally pump it uniformly through the negative pressure station to subsequent sewage treatment terminals, such as sewage treatment plants for treatment. Among them, the negative pressure station mainly includes a vacuum pump, a sewage pump and a negative pressure sewage collection tank. The vacuum pump draws out the air in the negative pressure sewage collection tank to form negative pressure, and then one end of the negative pressure pipe is connected to the above-mentioned negative pressure sewage collection tank, and the other end is connected to the negative pressure sewage collection tank. One end extends into the sewage collection well, thereby realizing the collection of sewage.

In practice, the inventor found that there are still some areas for improvement in the above-mentioned negative pressure sewage collection system. For example, due to the limited negative pressure provided by the negative pressure station (the air pressure in the negative pressure sewage collection tank has a minimum value), when its load When there are too many negative pressure pipes or they are too long, it will easily lead to insufficient suction force at the ends of each negative pressure pipe, thus affecting the drainage of sewage in the sewage collection well. In order to solve the above problems, the current common practice is to reduce the service radius of the negative pressure station. For example, a negative pressure station is only responsible for an area with a radius of 500-600m, which means that a village or area needs to build multiple Only a negative pressure station can meet the demand for negative pressure collection of sewage, and the construction and maintenance costs of the system will increase exponentially.

Contents of the invention

In view of the problem that the scope of the negative pressure station in the negative pressure sewage collection system is limited in actual use, resulting in high costs during the promotion and construction of the negative pressure sewage collection system, the first purpose of the present invention is to propose a negative pressure sewage relay station, which It can be used as a relay node to pump sewage in sewage collection wells and expand the operating area of a single negative pressure station. Based on the above relay station, the second purpose of this application is to propose a negative pressure sewage collection system, and the third purpose is to propose a control method for the negative pressure sewage collection system, which can reduce the energy consumption of the system while expanding the operating area of the negative pressure station. System faults are output in a timely manner and facilitate maintenance. The specific solutions are as follows:

A negative pressure sewage relay station includes a well body, the upper part of the well body is set as a normal pressure space, the lower part of the well body is set as a negative pressure space, and a sealing partition is provided between the normal pressure space and the negative pressure space. plate;

The negative pressure space is connected with a water inlet pipe and a water outlet pipe. The water inlet pipe and the water outlet pipe are respectively connected with the external sewage collection well and the sewage collection device. The water inlet pipe and the water outlet pipe are respectively provided with water pipes to control their flow. The water inlet valve and water outlet valve are in the off state;

The negative pressure space is also connected with a negative pressure air pipe connected to an external negative pressure source, a pressure relief pipe connected to the normal pressure space, an air pressure detector for detecting the negative pressure value in the negative pressure space, and a pressure detector for detecting the negative pressure value in the negative pressure space. A liquid level detector for detecting the height of the liquid level in the negative pressure space. The negative pressure air pipe is provided with a negative pressure switch valve for controlling the opening and closing of the negative pressure air pipe. The pressure relief pipe is provided with a pressure relief pipe for controlling the opening and closing of the negative pressure air pipe. On-off pressure relief valve;

A control component is also provided in the normal pressure space. The control component receives the air pressure detection signal output by the air pressure detection component and the liquid level detection signal output by the liquid level detection component, and controls the water inlet valve, water outlet valve, and drain valve. Pressure valve and negative pressure switch valve on and off.

Through the above technical solution, the relay station is used as the relay node between the negative pressure station and the sewage collection well. The negative pressure output from the negative pressure station can be concentrated at the relay station, and then the relay station is used to pre-collect the sewage in each sewage collection well. , and at the same time increase the suction force of the water inlet pipe port extending into the sewage collection well, which can greatly expand the operating area of a single negative pressure station, reduce the number of negative pressure stations, and reduce the construction cost of the sewage collection system.

Further, the control component is also provided with a remote communication module. The remote communication module is communicatively connected with an external control server, receives the air pressure detection signal and the liquid level detection signal, and outputs them to the control server.

Through the above technical solution, the operation status of each relay station can be monitored in real time.

A negative pressure sewage collection system includes a control server, a negative pressure station and multiple sewage collection wells. The negative pressure station is equipped with a vacuum pump, a sewage pump and a negative pressure sewage collection tank;

A negative pressure sewage relay station as described above is also provided between the negative pressure station and the sewage collection well; wherein,

The control components of each relay station control the opening and closing of the water inlet valve based on the set trigger signal or schedule;

The negative pressure air pipe of each relay station is connected to the vacuum pump in the negative pressure station, the water outlet pipe of the relay station is connected to the negative pressure sewage collection tank, and the water inlet pipe of the relay station is connected to each sewage collection well;

A strobe valve is provided in a one-to-one correspondence between the negative pressure air pipe of each relay station and the vacuum pump. The control server is configured to be data connected with the control component in the relay station and respond to the liquid level detection signal and air pressure in the relay station at the current moment. Detect signals to control the action of each strobe valve.

Through the above technical solution, the entire sewage collection system can use the relay station as a relay node to pump the sewage in each sewage collection well. The control server can be used to coordinate and control the connection between the vacuum pump and each of the sewage collection wells, so that the amount of negative pressure assigned to each sewage collection well can be maintained within a reasonable range, effectively expanding the operating scope of the negative pressure station and The cost investment is reduced. By setting up the strobe valve and the negative pressure switch valve, the two are connected in a linked manner. Or shut down, even if there is a leak in the negative pressure air pipe, it can ensure that the negative pressure in the relay station will not be lost and the power consumption of the vacuum pump will not be wasted.

Further, a collection well liquid level meter is provided in the sewage collection well, and the control components of each relay station are respectively connected with the signal of the collection well liquid level meter in the corresponding sewage collection well to receive the liquid level detection signal in the sewage collection well. When the When the liquid level in the sewage collection well reaches the set height, open the water inlet valve.

Through the above technical solutions, the system can achieve more precise sewage pumping control.

Further, the control server is also configured with:

A negative pressure amount monitoring module is provided in the negative pressure station, configured to measure the negative pressure suction power and time allocated to each relay station by the vacuum pump, and output negative pressure amount-period data;

A data storage module configured to be data connected with the negative pressure amount monitoring module, receive and store the negative pressure amount-period data;

The intelligent distribution module is configured to be connected to the negative pressure monitoring module, the data storage module and the liquid level detection component and the air pressure detection component in the relay station, and receives and responds to the current moment and the liquid level detection signal and air pressure detection signal in the relay station. signal, output negative pressure distribution signal, and control the action of each strobe valve.

Through the above technical solution, based on big data analysis of historical data, the amount of negative pressure required by each relay station at different times is obtained. Combined with the liquid level and air pressure detection signals at the current moment, the air in the relay station can be eliminated in advance, so that the relay station Maintain a certain degree of vacuum. When the sewage in the sewage collection well reaches the set liquid level in the later stage, the port where the water inlet pipe of the relay station extends into the sewage collection well can provide sufficient negative pressure suction force to ensure that the relay station has sufficient vacuum for each sewage collection well. The suction operation can be carried out smoothly, because the preset negative pressure is only performed during the time period when the operation is required, which also reduces the energy consumption of the vacuum pump as much as possible.

Further, the control server is also configured with:

The trend calculation module is connected to the collection well liquid level gauge signal in each sewage collection well, receives and calculates the rising rate of the liquid level in each sewage collection well, calculates the time required to reach the set maximum liquid level and outputs the preset negative pressure opening time;

The negative pressure preset module is signal-connected to the trend calculation module and the intelligent distribution module, receives the preset negative pressure opening time, and outputs a control signal when it detects that the system time reaches the preset negative pressure opening time. The gate valve operates.

Through the above technical solution, the air in the relay station can be pumped in advance according to the changing trend of the liquid level in the sewage collection well connected to the relay station to maintain the set vacuum degree. When the liquid level in the sewage collection well reaches the set height At this time, the relay station can perform rapid suction in a timely manner. Since the high vacuum degree in the relay station is only maintained for a set period of time before suction occurs, when the relay station is not tightly sealed, the energy consumption of the vacuum pump can be reduced.

Further, an adjusting air pipe is provided between two adjacent negative pressure air pipes. An electronically controlled multi-way valve is provided at the junction of the adjusting air pipe and the negative pressure air pipe. The electronically controlled multi-way valve is signally connected to the control server. ;

The control server receives and responds to the liquid level detection signal in the sewage collection well, the liquid level detection signal and the air pressure detection signal in the relay station, and controls the action of the electronically controlled multi-way valve.

Through the above technical solution, when the instantaneous sewage suction load of a certain relay station is too large and the vacuum pump cannot provide sufficient negative pressure in a short time, the control server will judge that if the vacuum degree in the adjacent relay station is smaller than the current relay station, it can Through the above-mentioned adjustment of the air pipe, two adjacent relay stations are connected, and the negative pressure in the adjacent relay station is used to temporarily alleviate the insufficient negative pressure of the current relay station, so that a single relay station can better cope with the sudden and instantaneous suction needs of huge amounts of sewage. .

Further, the control server is also configured with a pressure relief alarm component, which includes:

The attenuation rate storage module is used to store the standard vacuum degree attenuation rate within a set period of time under closed conditions in each relay station and its corresponding negative pressure air pipe;

The pressure relief alarm module is configured to be signally connected to the air pressure detection component in the relay station and data connected to the attenuation rate storage module, and to receive the air pressure detection output by the air pressure detection component under closed conditions in each relay station and its corresponding negative pressure air pipe. signal and calculate its attenuation rate. If it exceeds the standard vacuum attenuation rate, a pressure relief alarm signal is output.

Through the above technical solution, since the relay station is in a sealed state, when its water inlet valve, pressure relief valve, negative pressure switch valve, water outlet valve, etc. are all closed, if it is detected that the air pressure change rate in the well body of the above relay station exceeds the set value, If the leakage of the well body is within a certain range, it can be determined that there is leakage in the well body; similarly, if the sealing of the well body of the relay station is verified, the negative pressure switch valve is opened and the strobe valve at one end of the vacuum pump is closed. At this time, if the air pressure in the well body If the fluctuation occurs abnormally, it can be determined that there is leakage in the negative pressure air pipe and a corresponding alarm signal will be output.

Further, one end of the water inlet pipe extending into the sewage collection well is provided with a suction switch valve. The suction switch valve is controlled in association with the liquid level gauge and the water inlet valve of the collection well. When the liquid in the sewage collection well When the liquid level reaches the set liquid level, the suction on-off valve and on-off valve are opened.

Through the above technical solution, when the liquid level in the sewage collection well reaches the set height, the suction switch valve and the water inlet valve are opened to suck the sewage into the relay station. At the same time, when the water inlet pipe ruptures, the water inlet valve can be opened by turning off the suction switch valve, and the sealing condition of the water inlet pipe can be obtained by analyzing the air pressure changes in the well body of the relay station.

A negative pressure sewage collection system control method, based on the negative pressure sewage collection system as mentioned above, includes the following steps:

Allocate the amount of negative pressure to each relay station based on the real-time air pressure and/or set rules in the negative pressure space of the relay station well body;

Detect the liquid level in the sewage collection well and control the action of the water inlet valve on the relay station based on the liquid level detection results;

Detect the liquid level in the relay station and control the action of the outlet valve on the relay station based on the liquid level detection results; where,

When the relay station pumps sewage from the sewage collection well:

Turn off the pressure relief valve and water outlet valve, and open the water inlet valve and negative pressure switch valve;

After the liquid level in the negative pressure space reaches the set value, turn off the negative pressure switch valve and open the water outlet valve and pressure relief valve.

Further, based on the real-time air pressure and/or setting rules in the negative pressure space of the well body of the relay station, the amount of negative pressure is allocated to each relay station, including:

Based on the air pressure detection signal and liquid level detection signal of the negative pressure space in the current relay station, control the actions of the negative pressure switch valve, strobe valve and vacuum pump; and/or

Control the actions of the negative pressure switch valve, gate valve and vacuum pump based on the liquid level change rate in the sewage collection well; and/or

Control the actions of the negative pressure switch valve, strobe valve and vacuum pump based on historical data and the current moment, and preset the negative pressure value; and/or

Based on the negative pressure value retained in adjacent relay stations, the current required negative pressure value of the relay station, and the negative pressure value that the vacuum pump can provide, the negative pressure value between two adjacent relay stations is intelligently connected and distributed.

Through the above technical solution, the relay station can be used as a relay node to coordinate the connection relationship between the negative pressure station and the sewage collection well, and at the same time coordinate the conduction between each relay station to ensure that the entire negative pressure sewage collection system expands the operating area and is still Able to work efficiently.

Compared with the prior art, the beneficial effects of the present invention are as follows:

(1) By setting up a relay station between the negative pressure station and the sewage collection well, the operating area of a single negative pressure station can be greatly expanded and the construction cost of the system can be reduced;

(2) Through the coordinated control of each negative pressure relay station, the negative pressure output by the entire negative pressure station can be more reasonably distributed to each relay station, ensuring the efficient and stable operation of the entire system, and targeted improvement of rural domestic sewage. Problems include low collection efficiency and high system operating costs.

Description of the drawings

Figure 1 is a schematic structural diagram of a negative pressure sewage relay station;

Figure 2 is a schematic diagram of the functional architecture of the negative pressure sewage collection system;

Figure 3 is a schematic diagram of the functional architecture of the negative pressure sewage collection system (relay stations are set up in series);

Figure 4 is a schematic diagram of the functional modules of the control component and control server.

Reference signs: 100, relay station; 101, well body; 102, normal pressure space; 103, negative pressure space; 104, sealed partition; 105, water inlet pipe; 106, water outlet pipe; 107, water inlet valve; 108, water outlet Valve; 109. Negative pressure air pipe; 110. Pressure relief pipe; 111. Air pressure detection piece; 112. Liquid level detection piece; 113. Negative pressure switch valve; 115. Pressure relief valve; 116. Control component; 117. Remote communication module ; 118. Inspection port; 200. Control server; 201. Negative pressure monitoring module; 202. Data storage module; 203. Intelligent distribution module; 204. Trend calculation module; 205. Negative pressure preset module; 206. Pressure relief Alarm component; 207, attenuation rate storage module; 208, pressure relief alarm module; 300, negative pressure station; 301, vacuum pump; 302, sewage pump; 303, negative pressure sewage collection tank; 304, strobe valve; 305, regulating air pipe ; 306. Electronically controlled multi-way valve; 400. Sewage collection well; 401. Collection well liquid level gauge; 402. Suction switch valve.

Detailed ways

The present invention will be further described in detail below with reference to the examples and figures, but the implementation of the present invention is not limited thereto.

In this application, the amount of negative pressure refers to the negative pressure value that can be provided by the vacuum pump 301 in a space of a specific size after operating at a set power for a set time.

A negative pressure sewage relay station 100, as shown in Figure 1, includes a well body 101, the upper part of the well body 101 is set as a normal pressure space 102, the lower part of the well body 101 is set as a negative pressure space 103, the normal pressure space 102 and the negative pressure Sealing partitions 104 are provided between the spaces 103 . During installation, the above-mentioned well body 101 is buried underground. In order to facilitate maintenance, an inspection opening 118 is provided above the above-mentioned normal pressure space 102, and a cover plate is provided on the inspection opening 118.

As shown in Figure 1, the negative pressure space 103 is connected with a water inlet pipe 105 and a water outlet pipe 106 using flanges. The water inlet pipe 105 and the water outlet pipe 106 are respectively connected with the external sewage collection well 400 and the sewage collection device. The water inlet pipe 105 The water inlet valve 107 and the water outlet valve 108 are respectively provided with the water outlet pipe 106 to control its on-off state. In order to facilitate control, the above-mentioned water inlet valve 107 and the water outlet valve 108 are both solenoid valves.

As shown in Figure 1, the above-mentioned negative pressure space 103 is also connected with a negative pressure air pipe 109 connected with an external negative pressure source, a pressure relief pipe 110 connected with the normal pressure space 102, and used for detecting the negative pressure in the negative pressure space 103. The air pressure detector 111 is used to detect the pressure value, and the liquid level detector 112 is used to detect the liquid level in the negative pressure space 103 . In practical applications, the air pressure detection component 111 can be implemented using an electronic barometer to collect and output air pressure detection signals. The negative pressure air pipe 109 is provided with a negative pressure switching valve 113 for controlling the opening and closing of the negative pressure air pipe 109, and the pressure relief pipe 110 is provided with a pressure relief valve 115 for controlling the opening and closing of the pressure relief pipe 110. The above-mentioned negative pressure switching valve 113 and pressure relief valve 115 are both installed in the normal pressure space 102, and preferably use solenoid valves.

The normal pressure space 102 is also provided with a control component 116, such as a PLC control module. The control component 116 receives the air pressure detection signal output by the air pressure detection component 111 and the liquid level detection signal output by the liquid level detection component 112. Based on the preset The control program controls the on and off of the water inlet valve 107, the water outlet valve 108, the pressure relief valve 115 and the negative pressure switch valve 113. For example, in a specific control method, when the sewage in the sewage collection well 400 needs to be pumped (or is in a pumping standby state), the water inlet valve 107 , the pressure relief valve 115 and the water outlet valve 108 are first closed. , open the negative pressure switch valve 113 to extract the air in the negative pressure space 103, forming a negative pressure in the negative pressure space 103. After the above negative pressure value reaches the set value, open the water inlet valve 107, and use the water inlet pipe 105 to drain the sewage. The sewage in the collection well 400 is pumped into the negative pressure space 103 . After the liquid level in the negative pressure space 103 reaches the set height, the pressure relief valve 115 is opened and the water outlet valve 108 is opened and the water inlet valve 107 is turned off. As a result, the air pressure in the negative pressure space 103 returns to normal pressure, and the water outlet pipe is used. The suction force of 106 pulls out the sewage in the negative pressure space 103 of the relay station 100. When the liquid level in the negative pressure space 103 drops to the set height, the water outlet pipe 106 is turned off and the negative pressure switch valve 113 is opened, thereby reciprocating, to achieve Suction of sewage in the sewage collection well 400.

In order to facilitate real-time monitoring of the operation of the relay station 100, the control component 116 is also provided with Remote communication module 117. The above-mentioned remote communication module 117 is communicatively connected with the external control server 200, receives the air pressure detection signal and the liquid level detection signal and outputs them to the control server 200. In this application, the above-mentioned remote communication module 117 can be an optical fiber communication module arranged along the negative pressure air pipe 109, or a 4G wireless communication module.

It should be noted that the above-mentioned negative pressure sewage relay station 100 can be controlled independently by its own control component 116, or can be controlled in conjunction with an external control server 200 to ensure the normal operation of the entire relay station 100.

Different from the traditional sewage collection mode in which the negative pressure station 300 is directly connected to the sewage collection well 400, by setting up the negative pressure sewage relay station 100 and using the negative pressure space 103 in the relay station 100 to store the negative pressure, each pipe can be extended into the sewage. The water inlet pipe 105 port in the collection well 400 can generate sufficient negative pressure suction force, which can greatly expand the operating area of a single negative pressure station 300. Practice has shown that the operating radius of a single negative pressure station 300 in the scheme of this application is: The original 550m has been expanded to 4000m, reducing the construction cost of the entire negative pressure sewage collection system. At the same time, the entire system can also have enough redundancy to cope with sudden sewage pumping needs.

Based on the above-mentioned negative pressure sewage relay station 100, as shown in Figure 2, this application also proposes a negative pressure sewage collection system, which mainly includes a control server 200, a negative pressure station 300 and multiple sewage collection wells 400. The negative pressure station 300 is equipped with a vacuum pump 301, a sewage pump 302 and a negative pressure sewage collection tank 303. The vacuum pump 301 is connected to the top of the negative pressure sewage collection tank 303 and is used to discharge the air in the negative pressure sewage collection tank 303. , forming a certain degree of vacuum. The sewage pump 302 is connected to the bottom of the negative pressure sewage collection tank 303 and is used to discharge the sewage in the negative pressure sewage collection tank 303 to external treatment equipment.

In one embodiment, the control component 116 of each relay station 100 controls the opening and closing of the water inlet valve 107 based on a set schedule. For example, the water inlet valve 107 is opened every 2 hours to pump the sewage collection well 400. The above-mentioned interval time It can be obtained based on preliminary research.

In another embodiment, the sewage collection well 400 is provided with a collection well liquid level gauge 401, such as a float level gauge with a signal output function. When the liquid level in the sewage collection well 400 reaches a set height, the float The ball level gauge outputs a trigger signal, the water inlet valve 107 is opened, and negative pressure suction is started.

In this application, as shown in Figure 2, a negative pressure sewage relay station 100 as described above is also provided between the negative pressure station 300 and the sewage collection well 400. Among them, the control component 116 of each relay station 100 is connected with a signal to the collection well liquid level meter 401 in the corresponding sewage collection well 400, and receives the liquid level detection signal in the sewage collection well 400 to control the opening and closing of the water inlet valve 107. When the liquid level in the sewage collection well 400 reaches a set height, the control component 116 coordinates the activation of the above-mentioned water inlet valve 107 to pump sewage into the relay station 100 .

In a specific embodiment, as shown in Figure 3, a plurality of negative pressure sewage relay stations 100 as described above are provided between the negative pressure station 300 and the sewage collection well 400. Each negative pressure sewage relay station 100 is connected in series, one after another. Level amplified negative pressure station 300 Accordingly, the specifications of the corresponding negative pressure sewage relay stations 100 at each level can be set differently. For example, the closer the relay station 100 is to the negative pressure station 300, the larger the negative pressure space 103 will be.

As shown in Figure 2, the negative pressure air pipe 109 of each relay station 100 is connected to the vacuum pump 301 in the negative pressure station 300 through the negative pressure sewage collection tank 303. The outlet pipe 106 of the relay station 100 is connected to the negative pressure sewage collection tank 303. The relay station The water inlet pipe 105 of 100 is connected with each sewage collection well 400 and extends to the bottom of the sewage collection well 400 .

A strobe valve 304 is provided in one-to-one correspondence between the negative pressure air pipe 109 and the negative pressure sewage collection tank 303 of each relay station 100, that is, the vacuum pump 301. The control server 200 is configured to be data connected with the control component 116 in the relay station 100, and control the actions of each gate valve 304 in response to the liquid level detection signal and the air pressure detection signal in the relay station 100 at the current moment. Combined with the control process of the relay station 100, in one embodiment, when the liquid level in the relay station 100 reaches the set height, such as the set low liquid level, if the air pressure in the negative pressure space 103 of the relay station 100 is too high at this time, Then the above-mentioned strobe valve 304 is turned on, and the negative pressure in the negative pressure sewage collection tank 303 is used to extract the air in the negative pressure space 103 of the relay station 100, so that the air pressure in the negative pressure space 103 drops, which is beneficial to the later suction of sewage. . It should be noted that there are many control methods for the negative pressure sewage collection system of this application, and the cooperative relationship between the strobe valve 304 and each valve on the relay station 100 will not be described in detail here.

Since the amount of negative pressure that a negative pressure station 300 can provide is limited, in order to ensure that the entire negative pressure sewage collection system can operate smoothly, in this application, as shown in Figure 4, the control server 200 is also equipped with a negative pressure monitoring module 201 , data storage module 202 and intelligent distribution module 203.

The negative pressure monitoring module 201 is installed in the control server 200 of the negative pressure station 300 and is a program algorithm module configured to calculate the negative pressure suction power and time allocated by the vacuum pump 301 to each relay station 100 based on historical data. Output the negative pressure amount-period data used to reflect the relationship between negative pressure amount and time. The data storage module 202 is configured to be connected to the negative pressure amount monitoring module 201 for data connection, to receive and store the negative pressure amount-period data. The above-mentioned data storage module 202 is provided in the control server 200 and is implemented using a data hard disk module or other storage modules. The intelligent distribution module 203 is installed in the control server 200 of the negative pressure station 300 and is a program algorithm module configured to interact with the negative pressure monitoring module 201, the data storage module 202, and the liquid level detection component 112 and air pressure detection component in the relay station 100. 111 data connection, receives and responds to the current moment and the liquid level detection signal and air pressure detection signal in the relay station 100, outputs the negative pressure distribution signal, and controls the action of each strobe valve 304.

The above technical solution is based on big data analysis of historical data to obtain the amount of negative pressure required by each relay station 100 at different periods. Combined with the liquid level and air pressure detection signals collected at the current moment, the air in the relay station 100 can be eliminated in advance. , so that the relay station 100 maintains a certain degree of vacuum. Later, when the sewage in the sewage collection well 400 reaches the set liquid level, the water inlet pipe 105 of the relay station 100 extends into the port in the sewage collection well 400 to provide sufficient negative pressure pumping. The suction power ensures that the relay station 100 can smoothly carry out the suction operation of each sewage collection well 400. Since the preset negative pressure is only performed during the time period when the operation is required, the energy consumption of the vacuum pump 301 is also reduced as much as possible.

Optimally, the control server 200 is also configured with a trend calculation module 204 and a negative pressure preset module 205.

The above-mentioned trend calculation module 204 is connected with the signal of the collection well liquid level meter 401 in each sewage collection well 400, and receives and calculates the rising rate or rising pattern of the liquid level in each sewage collection well 400, such as a specific sewage collection well 400, where The liquid level of sewage always rises rapidly in the evening. From this, the time required to reach the set maximum liquid level can be calculated and the preset negative pressure opening time can be output.

The negative pressure preset module 205 is signal-connected to the trend calculation module 204 and the intelligent distribution module 203 to receive the preset negative pressure opening time. When it is detected that the system time reaches the preset negative pressure opening time, it outputs a control signal to control the strobe valve 304 conduction. In this application, since the strobe valve 304 and the negative pressure switch valve 113 are respectively provided at both ends of the negative pressure air pipe 109, after the strobe valve 304 is turned on, the system control server 200 cooperates with the control component 116 in the relay station 100, and at the same time The above-mentioned negative pressure switching valve 113 is turned on. After the strobe valve 304 and the negative pressure switch valve 113 are both turned on, the negative pressure output by the vacuum pump 301 can enter the negative pressure space 103 of the relay station 100 to preset negative pressure for sewage suction.

The above technical solution can pump the air in the relay station 100 in advance according to the liquid level change trend in the sewage collection well 400 connected to the relay station 100 to maintain the set vacuum degree. When the liquid level in the sewage collection well 400 When reaching the set height, the relay station 100 can perform rapid suction in time. Since the high vacuum degree in the relay station 100 is only maintained for a set period before suction occurs, when the relay station 100 or the negative pressure air pipe 109 is not tightly sealed, the energy consumption of the vacuum pump 301 can be reduced.

In practical applications, occasionally the instantaneous sewage suction load corresponding to certain relay stations 100 is too large. For example, the liquid levels in multiple sewage collection wells 400 reach the set suction height at the same time. At this time, the vacuum pump 301 cannot simultaneously The amount of negative pressure required to reach multiple relay stations 100 is provided. In order to ensure that the entire negative pressure sewage collection system can still operate normally in this case, in this application, as shown in Figure 2, an adjusting air pipe 305 is provided between two adjacent negative pressure air pipes 109, and the adjusting air pipe 305 and the negative pressure air pipe 109 An electronically controlled multi-way valve 306 is provided at the connection point, and the electronically controlled multi-way valve 306 is connected with the control server 200 via signals. In practice, it is preferable to choose two closely located negative pressure air pipes 109 to be connected.

The control server 200 receives and responds to the liquid level detection signal in the sewage collection well 400, the liquid level detection signal and the air pressure detection signal in the relay station 100, and controls the action of the electronically controlled multi-way valve 306. In practical applications, the control process of the control server 200 can be stored in the data storage module 202 in advance, and the corresponding control program module can be automatically called when a corresponding situation is encountered. For example, in relay station B 100 adjacent to relay station A 100, the liquid level in several corresponding sewage collection wells 400 continues to rise and will reach the highest liquid level at the same time at a set time in the future. At this time, if the vacuum pump 301 can be allocated to relay station B, The maximum negative pressure of 100 cannot meet the suction requirements of relay station B 100, so relay station 100 and A relay station are connected. The B relay station 100 transmits the preset negative pressure in the negative pressure space 103 of the A relay station 100 to the B relay station 100, temporarily alleviating the negative pressure demand of the B relay station 100 so that it can better cope with sudden instantaneous huge amounts. Sewage pumping needs.

Through the above-mentioned preset negative pressure operation and intelligent allocation of negative pressure amount, the entire negative pressure sewage suction system can operate smoothly and efficiently.

Based on the above system settings, the above control server 200 is also configured with a pressure relief alarm component 206 for detecting whether there is air pressure damage and leakage in the system. The pressure relief alarm component 206 includes a decay rate storage module 207 and a pressure relief alarm module 208 .

The attenuation rate storage module 207 is used to store the standard vacuum degree attenuation rate within a set time under closed conditions in each relay station 100 and its corresponding negative pressure air pipe 109 . Since the system pipeline system cannot be completely sealed, the above-mentioned standard vacuum degree decay rate for comparison can be measured after the pipeline is buried.

The pressure relief alarm module 208 is configured to be signally connected to the air pressure detection component 111 in the relay station 100 and to be connected to the attenuation rate storage module 207 in data, and to receive the output of the air pressure detection component 111 in each relay station 100 and its corresponding negative pressure air pipe 109 under closed conditions. The air pressure detects the signal and calculates its attenuation rate. If it exceeds the standard vacuum degree attenuation rate, a pressure relief alarm signal is output. The pressure release alarm module 208 is a program module loaded into the control server 200 , and its data processing can be implemented by the processor in the control server 200 .

Based on the above solution, since the relay station 100 is in a sealed state, when its water inlet valve 107, pressure relief valve 115, negative pressure switch valve 113, water outlet valve 108, etc. are all turned off, if it is detected that the well body 101 of the relay station 100 is detected at this time If the air pressure change rate exceeds the set range, it can be determined that there is leakage in the well body 101; similarly, if the sealing of the well body 101 of the relay station 100 is verified, the negative pressure switch valve 113 is opened and the vacuum pump 301 at one end is turned off. The gate valve 304, at this time, if the air pressure fluctuation in the well body 101 is abnormal, it can be determined that there is a leak in the negative pressure air pipe 109, and a corresponding alarm signal will be output.

As shown in Figure 2, the end of the above-mentioned water inlet pipe 105 extending into the sewage collection well 400 is provided with a suction switch valve 402. The suction switch valve 402 is controlled and set in association with the collection well liquid level gauge 401 and the water inlet valve 107. When the liquid level in the sewage collection well 400 reaches the set liquid level, the suction switching valve 402 and the switching valve are opened. The above-mentioned suction switch valve 402 uses a solenoid valve, and the above-mentioned collection well liquid level gauge 401 can use an electronic float level gauge, that is, when the liquid level in the sewage collection well 400 reaches a set height, an electrical signal is output to the suction valve. The on/off valve 402 can be opened to achieve suction. Based on the above technical solution, when the liquid level in the sewage collection well 400 reaches the set height, the suction switch valve 402 and the water inlet valve 107 are opened to suck the sewage into the relay station 100 . At the same time, when the water inlet pipe 105 ruptures, the suction switch valve 402 can be turned off and the water inlet valve 107 can be opened, and the sealing condition of the water inlet pipe 105 can be obtained by analyzing the air pressure changes in the well body 101 of the relay station 100 .

It should be noted that each functional module of the above system is equipped with a corresponding energy supply device, such as a solar power supply device at the relay station 100 .

Based on the above negative pressure sewage collection system, this application also proposes a negative pressure sewage collection system control method, which mainly includes the following steps:

S1, allocate negative pressure amounts to each relay station 100 based on the real-time air pressure and/or set rules in the negative pressure space 103 of the well body 101 of the relay station 100;

S2, detect the liquid level in the sewage collection well 400 and control the action of the water inlet valve 107 on the relay station 100 based on the liquid level detection result;

S3, detect the liquid level in the relay station 100 and control the action of the water outlet valve 108 on the relay station 100 based on the liquid level detection result.

In the above step S1, the control server 200 pumps the gas in the negative pressure space 103 according to the air pressure value in the negative pressure space 103 of the relay station 100 to ensure the amount of negative pressure in the negative pressure space 103, thereby ensuring that each relay station 100 All can effectively pump the sewage in the sewage collection well 400. The above control is actually feedback control, that is, by monitoring the air pressure value in the negative pressure space 103 of the relay station 100 in real time, the amount of negative pressure therein is adjusted in real time. In another embodiment, the negative pressure amount can be allocated to each relay station 100 based on set rules, such as the negative pressure amount allocated to each relay station 100 based on the negative pressure demand of each relay station 100 at each time period every day.

In the above-mentioned step S2, the liquid level detection component 112 in the sewage collection well 400, such as an electronic float level gauge, is used to detect the liquid level of the sewage, and then the liquid level detection signal is transmitted to the control component 116 and the control server 200. The water inlet valve 107 is opened.

In the above-mentioned step S3, the liquid level height in the negative pressure space 103 of the relay station 100 is detected through the liquid level detection component 112. In practical applications, the above-mentioned liquid level detection component 112 includes a first float for detecting a high liquid level state. The liquid level detector and the second float level detector used to detect the low liquid level state. When the liquid level reaches the high liquid level state, the above-mentioned water outlet valve 108 is opened. In a specific embodiment, the water outlet valve 108 can also be opened according to the sewage The rising rate of sewage in the collection well 400 comprehensively determines the timing of opening the outlet valve 108 .

In the setting embodiment, when the relay station 100 extracts the sewage in the sewage collection well 400: the pressure relief valve 115 and the water outlet valve 108 are turned off, the water inlet valve 107 and the negative pressure switch valve 113 are opened; After the liquid level reaches the set value, the negative pressure switch valve 113 is turned off, and the water outlet valve 108 and the pressure relief valve 115 are opened.

To elaborate further, based on the real-time air pressure and/or setting rules in the negative pressure space 103 of the well body 101 of the relay station 100, the amount of negative pressure is allocated to each relay station 100, including:

Based on the air pressure detection signal and liquid level detection signal of the negative pressure space 103 in the current relay station 100, the negative pressure switch is controlled The actions of the valve 113, the gate valve 304 and the vacuum pump 301 are adjusted in real time according to changes in the liquid level and air pressure in the negative pressure space 103 in the relay station 100.

In a specific embodiment, the actions of the negative pressure switch valve 113, the strobe valve 304 and the vacuum pump 301 are controlled based on the liquid level change rate in the sewage collection well 400. For example, when the rising rate of sewage in the sewage collection well 400 is too fast, then Preset negative pressure in the negative pressure space 103 of the relay station 100 in advance and discharge sewage.

In a specific implementation, the actions of the negative pressure switching valve 113, the strobe valve 304 and the vacuum pump 301 can also be controlled based on historical data and the current time, and the negative pressure value can be preset. For example, in rural domestic sewage treatment, the generation of sewage is mainly concentrated at noon and evening. For a single family, the above-mentioned sewage discharge period is often fixed. Therefore, the system can control the relay station 100 based on the above-mentioned historical data information. The sewage in the relay station 100 is discharged in advance and the corresponding negative pressure value is preset to ensure the normal and efficient operation of the entire sewage suction system.

Based on the negative pressure sewage suction system of the present application, in a specific embodiment, intelligent The negative pressure value between two adjacent relay stations 100 is connected and distributed, thereby achieving coordinated operation of the sewage collection system in an emergency.

The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above-mentioned embodiments. All technical solutions that fall under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications may be made without departing from the principles of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

A negative pressure sewage relay station, characterized by including a well body (101), the upper part of the well body (101) is set as a normal pressure space (102), and the lower part of the well body (101) is set as a negative pressure space (103), a sealing partition (104) is provided between the normal pressure space (102) and the negative pressure space (103);

The negative pressure space (103) is connected with a water inlet pipe (105) and a water outlet pipe (106). The water inlet pipe (105) and the water outlet pipe (106) are respectively connected to an external sewage collection well (400) and a sewage collection device. The water inlet pipe (105) and the water outlet pipe (106) are respectively provided with a water inlet valve (107) and a water outlet valve (108) for controlling their on-off status;

The negative pressure space (103) is also connected to a negative pressure air pipe (109) connected to an external negative pressure source, a pressure relief pipe (110) connected to the normal pressure space (102), and used to detect the negative pressure space. An air pressure detector (111) for the negative pressure value in (103) and a liquid level detector (112) for detecting the liquid level in the negative pressure space (103). The negative pressure air pipe (109) is provided with a A negative pressure switch valve (113) that controls the opening and closing of the negative pressure air pipe (109). The pressure relief pipe (110) is provided with a pressure relief valve (115) for controlling the opening and closing of the pressure relief pipe (110);

The normal pressure space (102) is also provided with a control component (116). The control component (116) receives the air pressure detection signal output by the air pressure detection component (111) and the liquid level detection component (112). The position detection signal controls the on and off of the water inlet valve (107), water outlet valve (108), pressure relief valve (115) and negative pressure switch valve (113).
The negative pressure sewage relay station according to claim 1, characterized in that the control component (116) is also provided with a remote communication module (117), and the remote communication module (117) communicates with the external control server (200) Connect, receive the air pressure detection signal and the liquid level detection signal and output them to the control server (200).
A negative pressure sewage collection system includes a control server (200), a negative pressure station (300) and multiple sewage collection wells (400). The negative pressure station (300) is equipped with a vacuum pump (301), a sewage pump ( 302) and negative pressure sewage collection tank (303);

It is characterized in that a negative pressure sewage relay station (100) as claimed in claim 2 is also provided between the negative pressure station (300) and the sewage collection well (400); wherein,

The negative pressure air pipe (109) of each relay station (100) is connected with the vacuum pump (301) in the negative pressure station (300), and the water outlet pipe (106) of the relay station (100) is connected with the negative pressure sewage collection tank. (303) are connected, and the water inlet pipe (105) of the relay station (100) is connected with each sewage collection well (400) respectively;

The control component (116) of each relay station (100) controls the opening and closing of the water inlet valve (107) based on a set trigger signal or schedule;

A strobe valve (304) is provided in one-to-one correspondence between the negative pressure air pipe (109) of each relay station (100) and the vacuum pump (301), and the control server (200) is configured to communicate with the vacuum pump (301) in the relay station (100). The control component (116) is connected with data and controls the action of each gate valve (304) in response to the liquid level detection signal and the air pressure detection signal output by the relay station (100) at the current moment.
The negative pressure sewage collection system according to claim 3, characterized in that a collection well liquid level meter (401) is provided in the sewage collection well (400), and the control components (116) of each relay station (100) are respectively connected with the control components (116) of each relay station (100). The corresponding collection well liquid level meter (401) in the sewage collection well (400) is connected with a signal to receive the liquid level detection signal in the sewage collection well (400). When the liquid level in the sewage collection well (400) reaches the set value, When setting the height, open the water inlet valve (107).
The negative pressure sewage collection system according to claim 3, characterized in that the control server (200) is also configured with:

The negative pressure monitoring module (201) is installed in the negative pressure station (300) and is configured to measure the negative pressure suction power and time allocated by the vacuum pump (301) to each relay station (100), and output the negative pressure Quantity-period data;

The data storage module (202) is configured to be connected to the negative pressure amount monitoring module (201) in data connection, to receive and store the negative pressure amount-period data;

The intelligent distribution module (203) is configured to be data connected with the negative pressure monitoring module (201), the data storage module (202), and the liquid level detection component (112) and air pressure detection component (111) in the relay station (100). , receiving and responding to the current time and the liquid level detection signal and the air pressure detection signal in the relay station (100), outputting the negative pressure distribution signal to control the action of each gate valve (304).
The negative pressure sewage collection system according to claim 4, characterized in that the control server (200) is also configured with:

The trend calculation module (204) is connected with the signal of the collection well liquid level gauge (401) in each sewage collection well (400), receives and calculates the rising rate of the liquid level in each sewage collection well (400), and calculates when it reaches the set value. The time required for the highest liquid level and output the preset negative pressure opening time;

The negative pressure preset module (205) is signally connected to the trend calculation module (204) and the intelligent distribution module (203), receives the preset negative pressure opening time, and detects that the system time reaches the preset negative pressure. After the opening time, a control signal is output to control the action of the gate valve (304).
The negative pressure sewage collection system according to claim 4, characterized in that an adjusting air pipe (305) is provided between two adjacent negative pressure air pipes (109), and the adjusting air pipe (305) and the negative pressure air pipe (109) ) is provided with an electronically controlled multi-way valve (306) at the junction, and the electronically controlled multi-way valve (306) is signally connected to the control server (200);

The control server (200) receives and responds to the liquid level detection signal in the sewage collection well (400), the liquid level detection signal and the air pressure detection signal in the relay station (100), and controls the electronically controlled multi-way valve ( 306) action.
The negative pressure sewage collection system according to claim 3, characterized in that the control server (200) is also equipped with a pressure relief alarm component (206), and the pressure release alarm component (206) includes:

The attenuation rate storage module (207) is used to store the negative pressure space (103) of each relay station (100) and its corresponding negative pressure air. The standard vacuum decay rate of the tube (109) within a set time under closed conditions;

The pressure relief alarm module (208) is configured to be signally connected to the air pressure detection component (111) in the relay station (100) and data connected to the attenuation rate storage module (207), and to receive each relay station (100) and its corresponding negative data. The air pressure detection signal output by the air pressure detection component (111) under closed conditions in the air pressure pipe (109) is calculated and its attenuation rate is calculated. If it exceeds the standard vacuum degree attenuation rate, a pressure release alarm signal is output.
The negative pressure sewage collection system according to claim 4, characterized in that a suction switch valve (402) is provided at one end of the water inlet pipe (105) extending into the sewage collection well (400), and the suction The switch valve (402) is controlled and set in association with the collection well liquid level gauge (401) and the water inlet valve (107). When the liquid level in the sewage collection well (400) reaches the set liquid level, the suction switch The valve (402) and the switch valve are opened.
A negative pressure sewage collection system control method, characterized in that, based on the negative pressure sewage collection system as claimed in any one of claims 4 to 9, it includes the following steps:

Allocate negative pressure amounts to each relay station (100) based on the real-time air pressure and/or set rules in the negative pressure space (103) of the well body (101) of the relay station (100);

Detect the liquid level in the sewage collection well (400) and control the action of the water inlet valve (107) on the relay station (100) based on the liquid level detection result;

Detect the liquid level in the relay station (100) and control the action of the water outlet valve (108) on the relay station (100) based on the liquid level detection result; wherein,

When the relay station (100) draws sewage from the sewage collection well (400):

Close the pressure relief valve (115) and the water outlet valve (108), open the water inlet valve (107) and the negative pressure switch valve (113);

After the liquid level in the negative pressure space (103) reaches the set value, the negative pressure switch valve (113) is turned off, and the water outlet valve (108) and the pressure relief valve (115) are opened.
The negative pressure sewage collection system control method according to claim 10, characterized in that the real-time air pressure and/or setting rules in the negative pressure space (103) of the relay station (100) well body (101) are used for each The relay station (100) distributes the amount of negative pressure, including:

Based on the air pressure detection signal and liquid level detection signal of the negative pressure space (103) in the current relay station (100), control the actions of the negative pressure switch valve (113), the strobe valve (304) and the vacuum pump (301); and/or

Control the actions of the negative pressure switch valve (113), gate valve (304) and vacuum pump (301) based on the liquid level change rate in the sewage collection well (400); and/or

Control the actions of the negative pressure switch valve (113), strobe valve (304) and vacuum pump (301) based on historical data and the current moment, and preset the negative pressure value; and/or

Based on the negative pressure value retained in the adjacent relay station (100), the current required negative pressure value of the relay station (100) and the negative pressure value provided by the vacuum pump (301), intelligently conduct and distribute the two adjacent relay stations (100) negative pressure value between.