Multi-load real-time online regulation and control negative pressure blowdown system

Abstract

The invention relates to the technical field of sewage treatment, and discloses a multi-load real-time online regulation and control negative pressure sewage discharge system, which comprises a first negative pressure sewage discharge device and a second negative pressure sewage discharge device, and the first negative pressure sewage discharge device and the second negative pressure sewage discharge device are in communication connection and are respectively communicated with a plurality of loads through negative pressure pipelines; the first negative pressure blowdown device serves as a main machine, continuously outputs negative pressure to the negative pressure pipeline, and outputs a starting instruction to the second negative pressure blowdown device when the negative pressure in the negative pressure pipeline is continuously low due to excessive load starting; and the second negative pressure blowdown device serves as a slave machine and is started to output negative pressure to the negative pressure pipeline when receiving the starting instruction, so that the negative pressure in the negative pressure pipeline is in a preset constant pressure state. Therefore, when the negative pressure generated by the first negative pressure blowdown device is not enough to meet the requirement for simultaneous work of multiple loads, the second negative pressure blowdown device is connected in real time to supplement the negative pressure so that the negative pressure can be kept in a constant pressure state, and normal work of the negative pressure blowdown system is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a multi-load real-time online regulation and control negative pressure sewage discharge system. Background Art

[0002] At present, a negative pressure sewage discharge system is generally used for sewage treatment. The negative pressure sewage discharge system generates negative pressure from a negative pressure generating device and outputs it to a negative pressure sewage collecting tank and its connected negative pressure pipeline, so that the negative pressure sewage collecting tank can collect sewage in the load through the negative pressure pipeline, and the negative pressure sewage collecting tank then sends the collected sewage to the sewage treatment device through the sewage discharge pipeline for treatment. In this process, if the working power of the negative pressure generating device is low and the negative pressure pressure generated cannot meet the load working, or the negative pressure pressure generated by the negative pressure generating device cannot meet the simultaneous working of multiple loads, the working efficiency of the negative pressure sewage discharge system will be reduced, resulting in low working efficiency of the negative pressure sewage discharge system, and in severe cases, it will affect the negative pressure sewage discharge system and make it unable to work normally. Summary of the invention

[0003] The embodiment of the present invention aims to provide a multi-load real-time online control negative pressure sewage discharge system, which can solve the problem that the negative pressure generated by the negative pressure generating device in the existing negative pressure sewage discharge system cannot meet the needs of single load operation or multiple loads working simultaneously, resulting in low working efficiency of the negative pressure sewage discharge system.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a multi-load real-time online control negative pressure sewage discharge system, comprising a first negative pressure sewage discharge device and a second negative pressure sewage discharge device, wherein the first negative pressure sewage discharge device and the second negative pressure sewage discharge device are communicatively connected, and the first negative pressure sewage discharge device and the second negative pressure sewage discharge device are respectively connected to a plurality of loads through negative pressure pipes; The first negative pressure sewage discharge device is used as a host to continuously output negative pressure to the negative pressure pipeline, and output a start instruction to the second negative pressure sewage discharge device when the negative pressure in the negative pressure pipeline is continuously low due to excessive load opening; The second negative pressure sewage discharge device serves as a slave, and is used to start outputting negative pressure to the negative pressure pipeline upon receiving the start instruction, so that the negative pressure in the negative pressure pipeline is in a preset constant pressure state.

[0005] Optionally, the multi-load real-time online control negative pressure sewage discharge system also includes a sewage treatment device, which is connected to the first negative pressure sewage discharge device and the second negative pressure sewage discharge device through sewage pipes, respectively, and is used to start the sewage discharge function according to the sewage switch instruction issued by the first negative pressure sewage discharge device and / or the second negative pressure sewage discharge device, wherein the sewage switch instruction includes a sewage discharge opening instruction and a sewage discharge closing instruction.

[0006] Optionally, the first negative pressure sewage discharge device includes a first control panel, a first frequency converter, a first air pump, a first pressure sensor and a first negative pressure sewage collecting tank, wherein: The first negative pressure sewage collecting tank is connected to a plurality of loads through negative pressure pipes, and is connected to the sewage treatment device through a sewage pipe; The first pressure sensor is disposed in the first negative pressure sewage collecting tank and is in communication connection with the first control board, and is used to detect the negative pressure in the first negative pressure sewage collecting tank, and obtain the negative pressure value and transmit it to the first control board; The first control board is communicatively connected to the first frequency converter, and is used to issue a frequency conversion instruction to the first frequency converter according to the negative pressure value; The first frequency converter is electrically connected to the first air pump, and is used to adjust the frequency of the first frequency converter according to the frequency conversion instruction to adjust the rotation speed of the first air pump, so that the first air pump continuously outputs negative pressure to the negative pressure pipeline.

[0007] Optionally, the first negative pressure sewage discharge device acts as a host, and when the first control board determines that the negative pressure in the negative pressure pipe is continuously low based on the negative pressure value being less than a first preset negative pressure value, the frequency of the first inverter being greater than the first preset frequency, and the duration being greater than the first preset duration, the first control board outputs a start instruction to the second negative pressure sewage discharge device, so that the second negative pressure sewage discharge device, which acts as a slave, starts to output negative pressure to the negative pressure pipe upon receiving the start instruction, so that the negative pressure in the negative pressure pipe is in a preset constant pressure state.

[0008] Optionally, the first control board determines that the negative pressure in the negative pressure pipe is normal based on the fact that the negative pressure value is greater than a second preset negative pressure, the frequency of the first inverter is less than the second preset frequency, and the duration is greater than the second preset duration, and outputs a stop command to the second negative pressure sewage discharge device, so that the second negative pressure sewage discharge device, which serves as a slave, stops outputting negative pressure to the negative pressure pipe upon receiving the stop command, so that the negative pressure in the negative pressure pipe is in a preset constant pressure state.

[0009] Optionally, the first negative pressure sewage discharge device also includes a first high liquid level probe, which is arranged at the highest liquid level marked in the first negative pressure sewage collecting tank and is communicatively connected to the first control board for detecting whether the sewage level in the first negative pressure sewage collecting tank exceeds the highest liquid level, and outputting an over-high liquid level signal to the first control board when the sewage level in the first negative pressure sewage collecting tank exceeds the highest liquid level.

[0010] Optionally, the first control panel is further used to issue a sewage solenoid valve switch instruction according to whether a liquid level over-high signal transmitted by the first high liquid level probe is received, wherein the sewage solenoid valve switch instruction includes a sewage solenoid valve opening instruction and a sewage solenoid valve closing instruction.

[0011] Optionally, the first negative pressure sewage discharge device also includes a first sewage discharge solenoid valve, which is arranged on the sewage discharge pipe between the first negative pressure sewage collecting tank and the sewage treatment device, and the first sewage discharge solenoid valve is communicatively connected to the first control board, and is used to control whether the first negative pressure sewage collecting tank and the sewage treatment device are connected together through the sewage discharge pipe according to the sewage discharge solenoid valve switch instruction issued by the first control board.

[0012] Optionally, if the first control panel receives an over-high liquid level signal transmitted by the first high liquid level probe, a sewage discharge solenoid valve opening instruction is issued to the first sewage discharge solenoid valve, and the first sewage discharge solenoid valve is opened according to the sewage discharge solenoid valve opening instruction to control the first negative pressure sewage collection tank and the sewage treatment device to be connected together through the sewage discharge pipe; If the first control panel does not receive the excessive liquid level signal transmitted by the first high liquid level probe, a sewage discharge solenoid valve closing instruction is issued to the first sewage discharge solenoid valve. The first sewage discharge solenoid valve is closed according to the sewage discharge solenoid valve closing instruction to control the first negative pressure sewage collecting tank and the sewage treatment device to disconnect.

[0013] Optionally, the multi-load real-time online control negative pressure sewage discharge system also includes a wireless router and a cloud server. The first negative pressure sewage discharge device and / or the second negative pressure sewage discharge device are communicated with the cloud server via the wireless router, and parameter data of the first negative pressure sewage discharge device and / or the second negative pressure sewage discharge device are uploaded to the cloud server via the wireless router. The first negative pressure sewage discharge device and / or the second negative pressure sewage discharge device receive the master-slave conversion instruction remotely issued by the cloud server via the wireless router, so that the first negative pressure sewage discharge device and the second negative pressure sewage discharge device achieve master-slave conversion.

[0014] Compared with the prior art, the present invention provides a multi-load real-time online control negative pressure sewage discharge system, including a first negative pressure sewage discharge device and a second negative pressure sewage discharge device, the first negative pressure sewage discharge device and the second negative pressure sewage discharge device are respectively connected to a number of loads through negative pressure pipes, so that the first negative pressure sewage discharge device and / or the second negative pressure sewage discharge device can collect sewage in the loads through negative pressure; the first negative pressure sewage discharge device and the second negative pressure sewage discharge device are communicated and connected, so that the first negative pressure sewage discharge device and the second negative pressure sewage discharge device can be kept online in real time; the first negative pressure sewage discharge device is used as the host to continuously output negative pressure pressure to the negative pressure pipe, and when the load is turned on too much and the negative pressure pressure in the negative pressure pipe is continuously low, a start instruction is output to the second negative pressure sewage discharge device, and the second negative pressure sewage discharge device is turned on and the negative pressure pressure in the negative pressure pipe is continuously low. When the device acts as a slave, it starts to output negative pressure to the negative pressure pipeline upon receiving the start-up instruction output by the first negative pressure sewage discharge device, so that the negative pressure in the negative pressure pipeline is in a preset constant pressure state, and multiple loads can be regulated online in real time. The negative pressure sewage discharge system has a master-slave online architecture. When the negative pressure generated by a single first negative pressure sewage discharge device as a host is not enough to meet the simultaneous operation of multiple loads, the second negative pressure sewage discharge device can be regulated online in real time as a slave to supplement the negative pressure in real time and keep the negative pressure in a constant pressure state, thereby ensuring the normal operation of the negative pressure sewage discharge system and improving the working efficiency of the negative pressure sewage discharge system. It can solve the problem that the negative pressure generated by the negative pressure generating device in the existing negative pressure sewage discharge system cannot meet the operation of a single load or multiple loads at the same time, resulting in low working efficiency of the negative pressure sewage discharge system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0016] Figure 1 It is a structural schematic diagram of a multi-load real-time online regulation and control negative pressure sewage discharge system provided by the present invention; Figure 2 It is a detailed structural schematic diagram of a multi-load real-time online control negative pressure sewage discharge system provided by the present invention.

[0017] The reference numerals are as shown in the following table: DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "bottom" etc. used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0019] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0020] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0021] In one embodiment, Figure 1 As shown, the present invention provides a multi-load real-time online control negative pressure sewage discharge system 100, comprising: a first negative pressure sewage discharge device 10 and a second negative pressure sewage discharge device 20, the first negative pressure sewage discharge device 10 and the second negative pressure sewage discharge device 20 are communicatively connected, and the first negative pressure sewage discharge device 10 and the second negative pressure sewage discharge device 20 are respectively connected to a plurality of loads through negative pressure pipes; The first negative pressure sewage discharge device 10 is used as a host to continuously output negative pressure to the negative pressure pipeline, and output a start instruction to the second negative pressure sewage discharge device 20 when the negative pressure in the negative pressure pipeline is continuously low due to excessive load opening; The second negative pressure sewage discharge device 20 serves as a slave, and is used to start outputting negative pressure to the negative pressure pipeline upon receiving a start instruction output by the first negative pressure sewage discharge device 10, so that the negative pressure in the negative pressure pipeline is in a preset constant pressure state.

[0022] In the present embodiment, a multi-load real-time online control negative pressure sewage discharge system is provided, including a first negative pressure sewage discharge device and a second negative pressure sewage discharge device, the first negative pressure sewage discharge device and the second negative pressure sewage discharge device are respectively connected to a number of loads through negative pressure pipes, so that the first negative pressure sewage discharge device and / or the second negative pressure sewage discharge device can collect sewage in the loads through negative pressure; the first negative pressure sewage discharge device and the second negative pressure sewage discharge device are communicated and connected, so that the first negative pressure sewage discharge device and the second negative pressure sewage discharge device can be kept online in real time; the first negative pressure sewage discharge device is used as the host to continuously output negative pressure pressure to the negative pressure pipe, and when the load is turned on too much and the negative pressure pressure in the negative pressure pipe is continuously low, the second negative pressure sewage discharge device The negative pressure drainage device is set as a slave and starts to output negative pressure to the negative pressure pipeline when receiving the start-up instruction output by the first negative pressure sewage discharge device, so that the negative pressure in the negative pressure pipeline is in a preset constant pressure state, and multiple loads can be regulated online in real time. The negative pressure sewage discharge system has a master-slave architecture. When the negative pressure generated by a single first negative pressure sewage discharge device as a host is not enough to meet the simultaneous operation of multiple loads, the second negative pressure sewage discharge device can be regulated online in real time as a slave to supplement the negative pressure in real time and keep the negative pressure in a constant pressure state, thereby ensuring the normal operation of the negative pressure sewage discharge system and improving the working efficiency of the negative pressure sewage discharge system. It can solve the problem that the negative pressure generated by the negative pressure generating device in the existing negative pressure sewage discharge system cannot meet the operation of a single load or multiple loads at the same time, resulting in low working efficiency of the negative pressure sewage discharge system.

[0023] In one embodiment, the first negative pressure sewage discharge device 10 and the second negative pressure sewage discharge device 20 are communicatively connected.

[0024] Specifically, Figure 2 As shown, the first negative pressure sewage discharge device 10 and the second negative pressure sewage discharge device 20 are connected via RS485 communication, so that the first negative pressure sewage discharge device 10 and the second negative pressure sewage discharge device 20 can achieve online function, maintain online status in real time, and maintain communication in real time.

[0025] RS485 communication is a bus standard for serial communication, which defines voltage, impedance, etc., but does not define the software protocol. The RS-485 bus standard specifies the electrical characteristics of the bus interface, that is, the definition of two logical states: a positive level between +2V and +6V represents one logical state; a negative level between -2V and -6V represents another logical state; digital signals use differential transmission, which can effectively reduce the interference of noise signals. However, the RS-485 bus standard does not make clear provisions for the application layer communication protocols related to the communication network, so users or related developers can establish high-level communication protocol standards applicable to their own communication network equipment.

[0026] In one embodiment, Figure 2 As shown, the multi-load real-time online control negative pressure sewage discharge system 100 also includes a sewage treatment device 30. The first negative pressure sewage discharge device 10 and the second negative pressure sewage discharge device 20 are respectively connected to the sewage treatment device 30 through sewage pipes. The sewage treatment device 30 is used to start the sewage discharge function according to the sewage switch instruction issued by the first negative pressure sewage discharge device 10 and / or the second negative pressure sewage discharge device 20, wherein the sewage switch instruction includes a sewage discharge opening instruction and a sewage discharge closing instruction.

[0027] In one embodiment, the first negative pressure sewage discharge device 10 serves as a main unit and is connected to a plurality of loads through negative pressure pipes, so as to continuously output negative pressure to the negative pressure pipes, and output a start instruction to the second negative pressure sewage discharge device 20 when too many loads are turned on and the negative pressure in the negative pressure pipes is continuously low.

[0028] Specifically, Figure 2 As shown, the first negative pressure sewage discharge device 10 includes: a first control board 11, a first frequency converter 12, a first air pump 13, a first pressure sensor 14 and a first negative pressure sewage collecting tank 15.

[0029] The first negative pressure sewage collecting tank 15 is a sealing device. The first negative pressure sewage collecting tank 15 is connected to a plurality of loads through negative pressure pipes, and is connected to the sewage treatment device 30 through a sewage pipe.

[0030] The first pressure sensor 14 is disposed in the first negative pressure sewage collecting tank 15, and is connected to the first control board 11 for communication, and is used to detect the negative pressure in the first negative pressure sewage collecting tank 15, and obtain the negative pressure value and transmit it to the first control board 11. Since the first negative pressure sewage collecting tank 15 and the negative pressure pipeline are connected together, the negative pressure in the first negative pressure sewage collecting tank 15 is the same as the negative pressure in the negative pressure pipeline, so the first pressure sensor 14 detects the negative pressure in the first negative pressure sewage collecting tank 15, which is equivalent to detecting the negative pressure in the negative pressure pipeline.

[0031] The first control board 11 is connected to the first frequency converter 12 for sending a frequency conversion instruction to the first frequency converter 12 according to the negative pressure value transmitted by the first pressure sensor 14 to adjust the frequency of the first frequency converter 12. For example, the first control board 11 is connected to the first frequency converter 12 via RS485 communication.

[0032] The first frequency converter 12 is electrically connected to the first air pump 13, and is used to adjust the frequency of the first frequency converter 12 according to the frequency conversion instruction issued by the first control board 11 to adjust the rotation speed of the first air pump 13, so as to control the negative pressure in the first negative pressure sewage collecting tank 15, so that the first air pump 13 continuously outputs negative pressure to the negative pressure pipeline.

[0033] The first negative pressure sewage discharge device 10 acts as the host. When the first control board 11 of the first negative pressure sewage discharge device 10 based on the negative pressure value in the first negative pressure sewage collecting tank 15 transmitted by the first pressure sensor 14 (that is, the negative pressure value of the first negative pressure sewage discharge device 10 as the host) is less than the first preset negative pressure value, the frequency of the first inverter 12 is greater than the first preset frequency, and the duration is greater than the first preset duration, it is determined that the negative pressure in the negative pressure pipeline is continuously low, and it is determined that the negative pressure generated by the first air pump 13 of the first negative pressure sewage discharge device 10 cannot meet the simultaneous operation of multiple loads or the working power of the first negative pressure sewage discharge device 10 is insufficient, and a start instruction is output to the second negative pressure sewage discharge device 20, so that the second negative pressure sewage discharge device 20 as a slave starts to output negative pressure to the negative pressure pipeline when receiving the start instruction output by the first negative pressure sewage discharge device 10, so that the negative pressure in the negative pressure pipeline is in a preset constant pressure state. That is to say, the condition for starting the second negative pressure sewage discharge device 20 as a slave is: the negative pressure value of the first negative pressure sewage discharge device 10 as the host is less than the first preset negative pressure value, the frequency of the first frequency converter 12 is greater than the first preset frequency, and the duration is greater than the first preset duration to start the second negative pressure sewage discharge device 20. For example: the first preset negative pressure value is 130Mbar, the first preset frequency is 80Hz, and the first duration is 5 seconds, then the condition for starting the second negative pressure sewage discharge device 20 as a slave is: the negative pressure value of the first negative pressure sewage discharge device 10 as the host is less than 130Mbar, the frequency of the first frequency converter 12 is greater than 80Hz, and the duration is greater than 5 seconds to start the second negative pressure sewage discharge device 20.

[0034] When the negative pressure value in the first negative pressure collecting tank 15 transmitted by the first pressure sensor 14 based on the first control board 11 is greater than the second preset negative pressure value, the frequency of the first inverter 12 or the frequency of the second inverter of the second negative pressure sewage discharge device 20 is less than the second preset frequency, and the duration is greater than the second preset duration, it is determined that the negative pressure in the negative pressure pipeline is normal, and it is determined that the negative pressure generated by the first air pump 13 of the first negative pressure sewage discharge device 10 can meet the simultaneous operation of multiple loads or the working power of the first negative pressure sewage discharge device 10 is sufficient, and a stop command is output to the second negative pressure sewage discharge device 20, so that the second negative pressure sewage discharge device 20 as a slave stops outputting negative pressure to the negative pressure pipeline when receiving the stop command output by the first negative pressure sewage discharge device 10, so that the negative pressure in the negative pressure pipeline is in a preset constant pressure state. That is, the condition for stopping the second negative pressure sewage discharge device 20 as a slave is: the negative pressure value of the first negative pressure sewage discharge device 10 as the host is greater than the second preset negative pressure value, the frequency of the first frequency converter 12 or the frequency of the second frequency converter of the second negative pressure sewage discharge device 20 is less than the second preset frequency, and the duration is greater than the second preset duration, the second negative pressure sewage discharge device 20 is stopped. For example: the second preset negative pressure value is 160Mbar, the second preset frequency is 40Hz, and the second duration is 15 seconds, then the condition for stopping the second negative pressure sewage discharge device 20 as a slave is: the negative pressure value of the first negative pressure sewage discharge device 10 as the host is greater than 160Mbar, the frequency of the first frequency converter 12 or the frequency of the second frequency converter of the second negative pressure sewage discharge device 20 is less than 40Hz, and the duration is greater than 15 seconds, the second negative pressure sewage discharge device 20 is stopped.

[0035] For example, the first control panel 11 includes a first controller, which is respectively communicated with the first pressure sensor 14 and the first frequency converter 12, and is used to send a pressure detection instruction to the first pressure sensor 14, receive the negative pressure value transmitted by the first pressure sensor 14, and send a frequency conversion instruction to the first frequency converter 12 based on the negative pressure value, so that the first frequency converter 12 adjusts the frequency of the first frequency converter 12 according to the frequency conversion instruction issued by the first controller to adjust the speed of the first air pump 13, so as to control the negative pressure in the first negative pressure sewage collecting tank 15, so that the first air pump 13 continuously outputs negative pressure to the negative pressure pipeline. When the negative pressure value in the first negative pressure collecting tank 15 transmitted by the first pressure sensor 14 is less than the first preset negative pressure value, the frequency of the first inverter 12 is greater than the first preset frequency, and the duration is greater than the first preset duration, the first controller determines that the negative pressure in the negative pressure pipe is continuously low, and determines that the negative pressure generated by the first air pump 13 of the first negative pressure sewage discharge device 10 cannot meet the simultaneous operation of multiple loads or the working power of the first negative pressure sewage discharge device is insufficient, and outputs a start command to the second negative pressure sewage discharge device 20 through RS485 communication, so that the second negative pressure sewage discharge device 20 as a slave starts to output negative pressure to the negative pressure pipe when receiving the start command output by the first negative pressure sewage discharge device 10, so that the negative pressure in the negative pressure pipe is in a preset constant pressure state.

[0036] When the negative pressure value in the first negative pressure collecting tank 15 transmitted by the first pressure sensor 14 is greater than the second preset negative pressure value, the frequency of the first inverter 12 or the frequency of the second inverter of the second negative pressure sewage discharge device 20 is less than the second preset frequency, and the duration is greater than the second preset duration, the first controller determines that the negative pressure in the negative pressure pipeline is normal, and determines that the negative pressure generated by the first air pump 13 of the first negative pressure sewage discharge device 10 can meet the simultaneous operation of multiple loads or the working power of the first negative pressure sewage discharge device 10 is sufficient, and outputs a stop command to the second negative pressure sewage discharge device 20, so that the second negative pressure sewage discharge device 20 as a slave stops outputting negative pressure to the negative pressure pipeline when receiving the stop command output by the first negative pressure sewage discharge device 10, so that the negative pressure in the negative pressure pipeline is in a preset constant pressure state. Thereby, the negative pressure sewage discharge system with multiple loads can be regulated online in real time and has a master-slave online architecture. When the negative pressure generated by a single first negative pressure sewage discharge device as a host is not enough to meet the simultaneous operation of multiple loads, the second negative pressure sewage discharge device can be regulated online in real time as a slave to supplement the negative pressure in real time and keep the negative pressure in a constant pressure state, thereby ensuring the normal operation of the negative pressure sewage discharge system and improving the working efficiency of the negative pressure sewage discharge system.

[0037] In one embodiment, Figure 2As shown, the first negative pressure sewage discharge device 10 also includes a first high liquid level probe 16, which is arranged at the highest liquid level marked in the first negative pressure sewage collecting tank 15 and is communicatively connected to the first control board 11, and is used to detect whether the sewage level in the first negative pressure sewage collecting tank 15 exceeds the highest liquid level, and output an over-high liquid level signal to the first control board 11 when the sewage level in the first negative pressure sewage collecting tank 15 exceeds the highest liquid level.

[0038] The first control board 11 is used to issue a sewage solenoid valve switch instruction according to whether it receives an excessive liquid level signal transmitted from the first high liquid level probe 16, wherein the sewage solenoid valve switch instruction includes a sewage solenoid valve opening instruction and a sewage solenoid valve closing instruction; the first control board 11 issues a sewage solenoid valve opening instruction when it receives an excessive liquid level signal transmitted from the first high liquid level probe 16, and issues a sewage solenoid valve closing instruction when the first control board 11 does not receive an excessive liquid level signal transmitted from the first high liquid level probe 16.

[0039] The first negative pressure sewage discharge device 10 also includes a first sewage discharge solenoid valve 17, which is arranged on a sewage discharge pipe between the first negative pressure sewage collecting tank 15 and the sewage treatment device 30. The first sewage discharge solenoid valve 17 is communicatively connected to the first control board 11, and is used to control whether the first negative pressure sewage collecting tank 15 and the sewage treatment device 30 are connected together through the sewage discharge pipe according to the sewage discharge solenoid valve switch instruction issued by the first control board 11.

[0040] Specifically, if the first control board 11 receives a liquid level over-high signal transmitted by the first high liquid level probe 16, the first control board 11 sends a sewage discharge solenoid valve opening instruction to the first sewage discharge solenoid valve 17. The first sewage discharge solenoid valve 17 is opened according to the sewage discharge solenoid valve opening instruction issued by the first control board 11 to control the first negative pressure sewage collecting tank 15 and the sewage treatment device 30 to be connected together through the sewage discharge pipe, so that the sewage in the first negative pressure sewage collecting tank 15 flows to the sewage treatment device 30 through the sewage discharge pipe; at the same time, the first control board 11 sends a sewage discharge opening instruction to the sewage treatment device 30, so that the sewage treatment device 30 starts to discharge sewage.

[0041] If the first control board 11 does not receive the excessive liquid level signal transmitted by the first high liquid level probe 16, it sends a sewage discharge solenoid valve closing instruction to the first sewage discharge solenoid valve 17. The first sewage discharge solenoid valve 17 is closed according to the sewage discharge solenoid valve closing instruction issued by the first control board 11 to control the first negative pressure sewage collecting tank 15 and the sewage treatment device 30 to disconnect, so that the sewage in the first negative pressure sewage collecting tank 15 cannot flow to the sewage treatment device 30 through the sewage discharge pipe; at the same time, the first control board 11 sends a sewage discharge closing instruction to the sewage treatment device 30 to make the sewage treatment device 30 close the sewage discharge.

[0042] For example, the first control panel 11 includes a first controller, which is respectively connected to the first high liquid level probe 16 and the first sewage discharge solenoid valve 17. If the first controller receives a liquid level over-high signal transmitted by the first high liquid level probe 16, the first controller sends a sewage discharge solenoid valve opening instruction to the first sewage discharge solenoid valve 17, and the first sewage discharge solenoid valve 17 is opened according to the sewage discharge solenoid valve opening instruction sent by the first controller to control the first negative pressure sewage collection tank 15 and the sewage treatment device 30 to be connected together through the sewage discharge pipe, so that the sewage in the first negative pressure sewage collection tank 15 flows to the sewage treatment device 30 through the sewage discharge pipe; at the same time, the first controller sends a sewage discharge opening instruction to the sewage treatment device 30, so that the sewage treatment device 30 starts sewage discharge.

[0043] If the first controller does not receive the excessive liquid level signal transmitted by the first high liquid level probe 16, it sends a sewage discharge solenoid valve closing instruction to the first sewage discharge solenoid valve 17. The first sewage discharge solenoid valve 17 is closed according to the sewage discharge solenoid valve closing instruction issued by the first controller to control the first negative pressure sewage collecting tank 15 and the sewage treatment device 30 to disconnect, so that the sewage in the first negative pressure sewage collecting tank 15 cannot flow to the sewage treatment device 30 through the sewage pipe; at the same time, the first controller sends a sewage discharge closing instruction to the sewage treatment device 30 to make the sewage treatment device 30 close the sewage discharge.

[0044] In this embodiment, a first high liquid level probe is set at the highest liquid level marked in the first negative pressure sewage collecting tank, and the first high liquid level probe is used to detect whether the sewage level in the first negative pressure sewage collecting tank exceeds the maximum liquid level. When the sewage level in the first negative pressure sewage collecting tank exceeds the maximum liquid level, an over-high liquid level signal is output to the first control board, so that when the first control board receives the over-high liquid level signal transmitted by the first high liquid level probe, it sends a sewage discharge solenoid valve opening instruction to the first sewage discharge solenoid valve, starts the sewage discharge function, ensures the safety of the first negative pressure sewage collecting tank, and ensures the normal operation of the negative pressure sewage discharge system.

[0045] In one embodiment, Figure 2 As shown, the first negative pressure sewage discharge device 10 also includes a first master-slave machine conversion switch 18, which is communicatively connected to the first control board 11 and is used to enable the first negative pressure sewage discharge device 10 and the second negative pressure sewage discharge device 20 to achieve master-slave machine conversion.

[0046] Specifically, the first master-slave conversion switch 18 is communicatively connected with the first controller of the first control board 11 , and is used to realize master-slave conversion between the first negative pressure sewage discharge device 10 and the second negative pressure sewage discharge device 20 .

[0047] In one embodiment, the second negative pressure sewage discharge device 20 acts as a slave, and is used to start outputting negative pressure to the negative pressure pipeline when receiving a start instruction output by the first negative pressure sewage discharge device 10, so that the negative pressure in the negative pressure pipeline is in a preset constant pressure state.

[0048] The second negative pressure sewage discharge device 20 has the same structure and function as the first negative pressure sewage discharge device 10. Figure 2 As shown, the second negative pressure sewage discharge device 20 includes: a second control board 21, a second frequency converter 22, a second air pump 23, a second pressure sensor 24 and a second negative pressure sewage collecting tank 25.

[0049] The second negative pressure sewage collecting tank 25 is a sealing device. The second negative pressure sewage collecting tank 25 is connected to a plurality of loads through negative pressure pipes, and is connected to the sewage treatment device 30 through a sewage pipe.

[0050] The second pressure sensor 24 is disposed in the second negative pressure sewage collecting tank 25, and is in communication connection with the second control board 21, and is used to detect the negative pressure in the second negative pressure sewage collecting tank 25, and obtain the negative pressure value and transmit it to the second control board 21. Since the second negative pressure sewage collecting tank 25 and the negative pressure pipeline are connected together, the negative pressure in the second negative pressure sewage collecting tank 25 is the same as the negative pressure in the negative pressure pipeline, so the second pressure sensor 24 detects the negative pressure in the second negative pressure sewage collecting tank 25, which is equivalent to detecting the negative pressure in the negative pressure pipeline.

[0051] The second control board 21 is connected to the second frequency converter 22 for sending a frequency conversion instruction to the second frequency converter 22 according to the negative pressure value transmitted by the second pressure sensor 24 to adjust the frequency of the second frequency converter 22. For example, the second control board 21 is connected to the second frequency converter 22 via RS485 communication.

[0052] The second frequency converter 22 is electrically connected to the second air pump 23, and is used to adjust the frequency of the second frequency converter 22 according to the frequency conversion instruction issued by the second control board 21 to adjust the rotation speed of the second air pump 23, so as to control the negative pressure in the second negative pressure sewage collecting tank 25, so that the second air pump 23 can continuously output negative pressure to the negative pressure pipeline.

[0053] The first negative pressure sewage discharge device 10 acts as the host. When the first control panel 11 of the first negative pressure sewage discharge device 10 determines that the negative pressure value in the first negative pressure sewage collection tank 15 transmitted by the first pressure sensor 14 (i.e., the negative pressure value of the first negative pressure sewage discharge device 10 as the host) is less than the first preset negative pressure value, the frequency of the first frequency converter 12 is greater than the first preset frequency, and the duration is greater than the first preset duration, it is determined that the negative pressure in the negative pressure pipeline is continuously low, and it is determined that the negative pressure generated by the first air pump 13 of the first negative pressure sewage discharge device 10 cannot meet the simultaneous operation of multiple loads or the working power of the first negative pressure sewage discharge device 10 is insufficient, and a start instruction is output to the second negative pressure sewage discharge device 20. The second negative pressure sewage discharge device 20, which acts as a slave, starts to output negative pressure to the negative pressure pipeline upon receiving the start instruction output by the first negative pressure sewage discharge device 10, so that the negative pressure in the negative pressure pipeline is in a preset constant pressure state. That is to say, the condition for starting the second negative pressure sewage discharge device 20 as a slave is: the negative pressure value of the first negative pressure sewage discharge device 10 as the host is less than the first preset negative pressure value, the frequency of the first frequency converter 12 is greater than the first preset frequency, and the duration is greater than the first preset duration to start the second negative pressure sewage discharge device 20. For example: the first preset negative pressure value is 130Mbar, the first preset frequency is 80Hz, and the first duration is 5 seconds, then the condition for starting the second negative pressure sewage discharge device 20 as a slave is: the negative pressure value of the first negative pressure sewage discharge device 10 as the host is less than 130Mbar, the frequency of the first frequency converter 12 is greater than 80Hz, and the duration is greater than 5 seconds to start the second negative pressure sewage discharge device 20.

[0054] When the negative pressure value in the first negative pressure collecting tank 15 transmitted by the first pressure sensor 14 is greater than the second preset negative pressure value, the frequency of the first frequency converter 12 or the frequency of the second frequency converter of the second negative pressure sewage discharge device 20 is less than the second preset frequency, and the duration is greater than the second preset duration, the first control board 11 determines that the negative pressure in the negative pressure pipeline is normal, determines that the negative pressure generated by the first air pump 13 of the first negative pressure sewage discharge device 10 can meet the simultaneous operation of multiple loads or the working power of the first negative pressure sewage discharge device 10 is sufficient, and outputs a stop command to the second negative pressure sewage discharge device 20. The second negative pressure sewage discharge device 20, as a slave, stops outputting negative pressure to the negative pressure pipeline upon receiving the stop command output by the first negative pressure sewage discharge device 10, so that the negative pressure in the negative pressure pipeline is in a preset constant pressure state. That is to say, the condition for stopping the second negative pressure sewage discharge device 20 as a slave is: the negative pressure value of the first negative pressure sewage discharge device 10 as the host is greater than the second preset negative pressure value, the frequency of the first frequency converter 12 or the frequency of the second frequency converter of the second negative pressure sewage discharge device 20 is less than the second preset frequency, and the duration is greater than the second preset duration, the second negative pressure sewage discharge device 20 is stopped. For example: the second preset negative pressure value is 160Mbar, the second preset frequency is 40Hz, and the second duration is 15 seconds, then the condition for stopping the second negative pressure sewage discharge device 20 as a slave is: the negative pressure value of the first negative pressure sewage discharge device 10 as the host is greater than 160Mbar, the frequency of the first frequency converter 12 or the frequency of the second frequency converter of the second negative pressure sewage discharge device 20 is less than 40Hz, and the duration is greater than 15 seconds, the second negative pressure sewage discharge device 20 is stopped.

[0055] In one embodiment, Figure 2 As shown, the second negative pressure sewage discharge device 20 also includes a second high liquid level probe 26, which is arranged at the highest liquid level marked in the second negative pressure sewage collecting tank 25 and is communicatively connected to the second control board 21, and is used to detect whether the sewage level in the second negative pressure sewage collecting tank 25 exceeds the highest liquid level, and output an over-high liquid level signal to the second control board 21 when the sewage level in the second negative pressure sewage collecting tank 25 exceeds the highest liquid level.

[0056] The second control board 21 is used to issue a sewage solenoid valve switching instruction according to whether it receives an excessive liquid level signal transmitted from the second high liquid level probe 26, wherein the sewage solenoid valve switching instruction includes a sewage solenoid valve opening instruction and a sewage solenoid valve closing instruction; the second control board 21 issues a sewage solenoid valve opening instruction when it receives an excessive liquid level signal transmitted from the second high liquid level probe 26, and issues a sewage solenoid valve closing instruction when the second control board 21 does not receive an excessive liquid level signal transmitted from the second high liquid level probe 26.

[0057] The second negative pressure sewage discharge device 20 also includes a second sewage discharge solenoid valve 27, which is arranged on the sewage discharge pipe between the second negative pressure sewage collecting tank 25 and the sewage treatment device 30. The second sewage discharge solenoid valve 27 is communicatively connected to the second control board 21, and is used to control whether the second negative pressure sewage collecting tank 25 and the sewage treatment device 30 are connected together through the sewage discharge pipe according to the sewage discharge solenoid valve switch instruction issued by the second control board 21.

[0058] Specifically, if the second control board 21 receives a liquid level over-high signal transmitted by the second high liquid level probe 26, the second control board 21 sends a sewage discharge solenoid valve opening instruction to the second sewage discharge solenoid valve 27, and the second sewage discharge solenoid valve 27 is opened according to the sewage discharge solenoid valve opening instruction issued by the second control board 21 to control the second negative pressure sewage collecting tank 25 and the sewage treatment device 30 to be connected together through the sewage discharge pipe, so that the sewage in the second negative pressure sewage collecting tank 25 flows to the sewage treatment device 30 through the sewage discharge pipe; at the same time, the second control board 21 sends a sewage discharge opening instruction to the sewage treatment device 30, so that the sewage treatment device 30 starts to discharge sewage.

[0059] If the second control board 21 does not receive the excessive liquid level signal transmitted by the second high liquid level probe 26, it sends a sewage discharge solenoid valve closing instruction to the second sewage discharge solenoid valve 27. The second sewage discharge solenoid valve 27 is closed according to the sewage discharge solenoid valve closing instruction issued by the second control board 21 to control the second negative pressure sewage collecting tank 25 and the sewage treatment device 30 to disconnect, so that the sewage in the second negative pressure sewage collecting tank 25 cannot flow to the sewage treatment device 30 through the sewage discharge pipe; at the same time, the second control board 21 sends a sewage discharge closing instruction to the sewage treatment device 30 to make the sewage treatment device 30 close the sewage discharge.

[0060] For example, the second control panel 21 includes a second controller, which is respectively connected to the second high liquid level probe 26 and the second sewage discharge solenoid valve 27. If the second controller receives a liquid level over-high signal transmitted by the second high liquid level probe 26, the second controller sends a sewage discharge solenoid valve opening instruction to the second sewage discharge solenoid valve 27, and the second sewage discharge solenoid valve 27 is opened according to the sewage discharge solenoid valve opening instruction sent by the second controller to control the second negative pressure sewage collection tank 25 and the sewage treatment device 30 to be connected together through the sewage discharge pipe, so that the sewage in the second negative pressure sewage collection tank 25 flows to the sewage treatment device 30 through the sewage discharge pipe; at the same time, the second controller sends a sewage discharge opening instruction to the sewage treatment device 30, so that the sewage treatment device 30 starts to discharge sewage.

[0061] If the second controller does not receive the excessive liquid level signal transmitted by the second high liquid level probe 26, it sends a sewage discharge solenoid valve closing instruction to the second sewage discharge solenoid valve 27. The second sewage discharge solenoid valve 27 is closed according to the sewage discharge solenoid valve closing instruction issued by the second controller to control the second negative pressure sewage collecting tank 25 and the sewage treatment device 30 to disconnect, so that the sewage in the second negative pressure sewage collecting tank 25 cannot flow to the sewage treatment device 30 through the sewage pipe; at the same time, the second controller sends a sewage discharge closing instruction to the sewage treatment device 30 to make the sewage treatment device 30 close the sewage discharge.

[0062] In one embodiment, Figure 2 As shown, the second negative pressure sewage discharge device 20 also includes a second master-slave machine conversion switch 28, which is communicatively connected to the second control board 21 and is used to enable the second negative pressure sewage discharge device 20 and the first negative pressure sewage discharge device 10 to achieve master-slave machine conversion.

[0063] Specifically, the second master-slave conversion switch 28 is communicatively connected with the first controller of the second control board 21 , so that the second negative pressure sewage discharge device 20 and the first negative pressure sewage discharge device 10 can realize master-slave conversion.

[0064] In one embodiment, Figure 2 As shown, the multi-load real-time online control negative pressure sewage discharge system 100 also includes a wireless router 40 and a cloud server 50. The wireless router 40 is wirelessly connected to the first negative pressure sewage discharge device 10 and / or the second negative pressure sewage discharge device 20 respectively. The first negative pressure sewage discharge device 10 and / or the second negative pressure sewage discharge device 20 is communicated with the cloud server 50 through the wireless router 40, and the parameter data of the first negative pressure sewage discharge device 10 and / or the second negative pressure sewage discharge device 20 is uploaded to the cloud server 50 through the wireless router 40.

[0065] Furthermore, the first negative pressure sewage discharge device 10 and the second negative pressure sewage discharge device 20 can receive the master-slave conversion instruction remotely issued by the cloud server 50 through the wireless router 40, so that the first negative pressure sewage discharge device 10 and the second negative pressure sewage discharge device 20 can realize the master-slave conversion, that is: the first negative pressure sewage discharge device 10 is converted from a host to a slave, and the second negative pressure sewage discharge device 20 is converted from a slave to a host, or the first negative pressure sewage discharge device 10 is converted from a slave to a host, and the second negative pressure sewage discharge device 20 is converted from a host to a slave.

[0066] In this embodiment, by setting a wireless router in the negative pressure sewage discharge system for real-time online load control, the first negative pressure sewage discharge device and the second negative pressure sewage discharge device can have the function of remote interaction with the cloud server, and can upload parameter data to the cloud server; and since the structure and function of the first negative pressure sewage discharge device and the second negative pressure sewage discharge device are the same, the first negative pressure sewage discharge device and the second negative pressure sewage discharge device can also receive the master-slave conversion instruction remotely issued from the cloud server, so that the first negative pressure sewage discharge device and the second negative pressure sewage discharge device can exchange master and slave.

[0067] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the above embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the above embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-load real-time online control negative pressure sewage discharge system, characterized in that: It includes a first negative pressure sewage discharge device and a second negative pressure sewage discharge device, the first negative pressure sewage discharge device and the second negative pressure sewage discharge device are communicatively connected, and the first negative pressure sewage discharge device and the second negative pressure sewage discharge device are respectively connected to a plurality of loads through negative pressure pipelines; The first negative pressure sewage discharge device is used as a host to continuously output negative pressure to the negative pressure pipeline, and output a start instruction to the second negative pressure sewage discharge device when the negative pressure in the negative pressure pipeline is continuously low due to excessive load opening; The second negative pressure sewage discharge device serves as a slave, and is used to start outputting negative pressure to the negative pressure pipeline upon receiving the start instruction, so that the negative pressure in the negative pressure pipeline is in a preset constant pressure state.

2. The multi-load real-time online control negative pressure sewage discharge system according to claim 1 is characterized in that: The multi-load real-time online control negative pressure sewage discharge system also includes a sewage treatment device, which is connected to the first negative pressure sewage discharge device and the second negative pressure sewage discharge device through sewage pipes, respectively, and is used to start the sewage discharge function according to the sewage switch instruction issued by the first negative pressure sewage discharge device and / or the second negative pressure sewage discharge device, wherein the sewage switch instruction includes a sewage discharge opening instruction and a sewage discharge closing instruction.

3. The multi-load real-time online control negative pressure sewage discharge system according to claim 2 is characterized in that: The first negative pressure sewage discharge device includes a first control panel, a first frequency converter, a first air pump, a first pressure sensor and a first negative pressure sewage collecting tank, wherein: The first negative pressure sewage collecting tank is connected to a plurality of loads through negative pressure pipes, and is connected to the sewage treatment device through a sewage pipe; The first pressure sensor is disposed in the first negative pressure sewage collecting tank and is in communication connection with the first control board, and is used to detect the negative pressure in the first negative pressure sewage collecting tank, and obtain the negative pressure value and transmit it to the first control board; The first control board is communicatively connected to the first frequency converter, and is used to issue a frequency conversion instruction to the first frequency converter according to the negative pressure value; The first frequency converter is electrically connected to the first air pump, and is used to adjust the frequency of the first frequency converter according to the frequency conversion instruction to adjust the rotation speed of the first air pump, so that the first air pump continuously outputs negative pressure to the negative pressure pipeline.

4. The multi-load real-time online control negative pressure sewage discharge system according to claim 3 is characterized in that: The first negative pressure sewage discharge device acts as the host. When the first control board determines that the negative pressure in the negative pressure pipe is continuously low based on the negative pressure value being less than the first preset negative pressure value, the frequency of the first inverter being greater than the first preset frequency, and the duration being greater than the first preset duration, the first control board outputs a start instruction to the second negative pressure sewage discharge device, so that the second negative pressure sewage discharge device, which acts as a slave, starts to output negative pressure to the negative pressure pipe upon receiving the start instruction, so that the negative pressure in the negative pressure pipe is in a preset constant pressure state.

5. The multi-load real-time online control negative pressure sewage discharge system according to claim 3 is characterized in that: The first control board determines that the negative pressure in the negative pressure pipe is normal based on the fact that the negative pressure value is greater than the second preset negative pressure, the frequency of the first inverter is less than the second preset frequency, and the duration is greater than the second preset duration, and outputs a stop command to the second negative pressure sewage discharge device, so that the second negative pressure sewage discharge device, as a slave, stops outputting negative pressure to the negative pressure pipe upon receiving the stop command, so that the negative pressure in the negative pressure pipe is in a preset constant pressure state.

6. The multi-load real-time online control negative pressure sewage discharge system according to claim 3 is characterized in that: The first negative pressure sewage discharge device also includes a first high liquid level probe, which is arranged at the highest liquid level marked in the first negative pressure sewage collecting tank and is communicatively connected to the first control board for detecting whether the sewage level in the first negative pressure sewage collecting tank exceeds the highest liquid level, and outputting an over-high liquid level signal to the first control board when the sewage level in the first negative pressure sewage collecting tank exceeds the highest liquid level.

7. The multi-load real-time online control negative pressure sewage discharge system according to claim 6 is characterized in that: The first control panel is further used to issue a sewage solenoid valve switch instruction according to whether a liquid level over-high signal transmitted by the first high liquid level probe is received, wherein the sewage solenoid valve switch instruction includes a sewage solenoid valve opening instruction and a sewage solenoid valve closing instruction.

8. The multi-load real-time online control negative pressure sewage discharge system according to claim 7 is characterized in that: The first negative pressure sewage discharge device also includes a first sewage discharge solenoid valve, which is arranged on a sewage discharge pipe between the first negative pressure sewage collecting tank and the sewage treatment device. The first sewage discharge solenoid valve is communicatively connected to the first control board and is used to control whether the first negative pressure sewage collecting tank and the sewage treatment device are connected together through the sewage discharge pipe according to the sewage discharge solenoid valve switch instruction issued by the first control board.

9. The multi-load real-time online control negative pressure sewage discharge system according to claim 8 is characterized in that: If the first control panel receives the liquid level over-high signal transmitted by the first high liquid level probe, it sends a sewage discharge solenoid valve opening instruction to the first sewage discharge solenoid valve, and the first sewage discharge solenoid valve opens according to the sewage discharge solenoid valve opening instruction to control the first negative pressure sewage collection tank and the sewage treatment device to be connected together through the sewage discharge pipe; If the first control panel does not receive the excessive liquid level signal transmitted by the first high liquid level probe, a sewage discharge solenoid valve closing instruction is issued to the first sewage discharge solenoid valve. The first sewage discharge solenoid valve is closed according to the sewage discharge solenoid valve closing instruction to control the first negative pressure sewage collecting tank and the sewage treatment device to disconnect.

10. The multi-load real-time online control negative pressure sewage discharge system according to claim 1, characterized in that: The multi-load real-time online control negative pressure sewage discharge system also includes a wireless router and a cloud server. The first negative pressure sewage discharge device and / or the second negative pressure sewage discharge device are communicated with the cloud server through the wireless router, and the parameter data of the first negative pressure sewage discharge device and / or the second negative pressure sewage discharge device are uploaded to the cloud server through the wireless router. The first negative pressure sewage discharge device and the second negative pressure sewage discharge device receive the master-slave conversion instruction remotely issued by the cloud server through the wireless router, so that the first negative pressure sewage discharge device and the second negative pressure sewage discharge device can realize the master-slave conversion.

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