Vacuum drainage system fault self-closing and monitoring positioning device and method

Abstract

The present application relates to the field of vacuum drainage, and provides a fault self-closing and monitoring positioning device and method for a vacuum drainage system. The device comprises a vacuum diaphragm valve arranged in a pipeline of the vacuum drainage system, and a negative pressure tank connected to the vacuum diaphragm valve through a stable air pipe. The pipeline of the vacuum drainage system is connected to the negative pressure tank through an air inlet bypass pipe, and the connection between the pipeline of the vacuum drainage system and the air inlet bypass pipe is located downstream of the vacuum diaphragm valve. A one-way valve and a first valve are arranged on the air inlet bypass pipe. A first pressure gauge is arranged on the pipeline of the vacuum drainage system, and the first pressure gauge is located upstream of the vacuum diaphragm valve. The negative pressure tank is provided with a second pressure gauge and is connected to an exhaust pipe, and the exhaust pipe is provided with a second valve. The present application can realize monitoring of the running state of the vacuum drainage system, positioning of a leakage point, automatic closing of a damaged section, and can ensure stable operation of the system.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vacuum drainage collection, and particularly relates to a fault self-closing and monitoring positioning device and method of a vacuum drainage system. BACKGROUND

[0002] The vacuum drainage technology has the characteristics of good air tightness, high safety, high collection rate of sewage, etc. It is suitable for areas where gravity flow pipe network implementation is difficult, such as densely populated residential areas, poor building disturbance resistance, narrow roadway, high groundwater level, poor geological conditions, low population density, or scattered drainage points. It is an important complementary collection technology in addition to the traditional gravity collection system.

[0003] The vacuum drainage system is composed of a vacuum lifter, a vacuum pipeline and a vacuum pump station. The vacuum lifter collects sewage from each water using unit, the vacuum pipeline forms the vacuum drainage system pipe network, and the vacuum pump station is the terminal. The vacuum pump station generates negative pressure vacuum for the entire system and collects sewage. The sewage is finally transported to the downstream pipe network or the back-end sewage treatment facility for treatment. The vacuum lifter is installed at each sewage discharge point and includes a controller, a liquid level sensor, a vacuum diaphragm valve and a box, etc. The vacuum diaphragm valve is a key component of the vacuum drainage system. During operation, vacuum lifter failure, vacuum diaphragm valve blockage by foreign matter or vacuum pipeline damage will cause air leakage and pressure relief, affecting the stable operation of the entire vacuum drainage system and increasing the system operation energy consumption. The current market products cannot quickly locate the fault point at low cost, resulting in the need to spend a lot of effort to find the fault point during operation and maintenance, which brings great inconvenience to operation and maintenance.

[0004] The existing monitoring Internet of Things technology on the market can monitor the vacuum drainage system, but it is basically set in the vacuum lifter to reflect the entire system by monitoring the operation state of the vacuum lifter. The main disadvantages of this method are: first, the monitoring system needs to be applied to each vacuum lifter, resulting in high one-time investment; second, the monitoring system only monitors the vacuum lifter and cannot real-time master the operation state of the vacuum pipeline network. Once the vacuum pipeline network is damaged, it cannot be found in time; third, the monitoring system cannot automatically cut off the damaged section. Once unstable, the system will continue to operate, resulting in increased operation energy consumption. SUMMARY

[0005] In view of the deficiencies and shortcomings in the prior art, the purpose of the present application is to provide a fault self-closing and monitoring positioning device and method of a vacuum drainage system, which can monitor the operation state of the vacuum drainage system, locate the leakage point, automatically close the damaged section, and achieve the purpose of ensuring stable operation of the system and reducing operation energy consumption.

[0006] In a first aspect, the present application provides a fault self-closing and monitoring positioning device for a vacuum drainage system, comprising a vacuum diaphragm valve arranged in a vacuum drainage system pipeline, a negative pressure tank connected to the vacuum diaphragm valve through a stable air pipe; the vacuum drainage system pipeline is connected to the negative pressure tank through an air inlet bypass pipe, and the connection between the vacuum drainage system pipeline and the air inlet bypass pipe is located downstream of the vacuum diaphragm valve; a one-way valve and a first valve are arranged on the air inlet bypass pipe; a first pressure gauge is arranged on the vacuum drainage system pipeline, and the first pressure gauge is located upstream of the vacuum diaphragm valve; the negative pressure tank is provided with a second pressure gauge and is connected with an exhaust pipe, and the exhaust pipe is provided with a second valve; the vacuum diaphragm valve is connected with an Internet of Things controller for monitoring the opening and closing state of the vacuum diaphragm valve.

[0007] Optionally, the fault self-closing and monitoring positioning device further comprises a control system connected with the first pressure gauge, the second pressure gauge, the first valve and the second valve.

[0008] Optionally, the first pressure gauge is connected with a trigger, and the second valve is interlocked with the trigger; the second pressure gauge is interlocked with the first valve.

[0009] Optionally, an upper trigger connecting piece is arranged outside the diaphragm of the vacuum diaphragm valve, and a lower trigger connecting piece is arranged on the inner wall of the shell of the valve body of the vacuum diaphragm valve; the lower trigger connecting piece is connected with the Internet of Things controller.

[0010] Optionally, a water collecting unit is connected to the upstream of the vacuum drainage system pipeline, and a vacuum pump station is connected to the downstream end of the vacuum drainage system pipeline.

[0011] In a second aspect, the present application provides a vacuum drainage system, which comprises the above-mentioned fault self-closing and monitoring positioning device.

[0012] Optionally, the vacuum drainage system further comprises a main pipeline and a plurality of branch pipelines; the upstream end of each branch pipeline is connected to a water collecting unit, and the downstream end of each branch pipeline is connected to the main pipeline; the downstream end of the main pipeline is connected to a vacuum pump station; the fault self-closing and monitoring positioning device is arranged on each branch pipeline and / or the main pipeline.

[0013] In a third aspect, the present application provides a fault self-closing and monitoring positioning method for a vacuum drainage system, which is based on the above-mentioned fault self-closing and monitoring positioning device and / or the above-mentioned vacuum drainage system.

[0014] Optionally, the method further comprises: the vacuum drainage system is opened, the first valve and the one-way valve on the air inlet bypass pipe are opened, the vacuum drainage system pipeline generates negative pressure through the vacuum pump station at the downstream end, the negative pressure tank is vacuumized, when the negative pressure value in the negative pressure tank reaches the first negative pressure threshold, the first valve is closed; the first negative pressure threshold in the negative pressure tank is greater than the normal negative pressure value in the vacuum drainage system pipeline, the vacuum diaphragm valve is opened, the upstream and downstream of the vacuum drainage system pipeline are connected, and the vacuum drainage system is normally operated; when the vacuum drainage system fails and the negative pressure value of the vacuum drainage system pipeline decreases, the second valve is opened when the first pressure gauge reaches the second negative pressure threshold, so that the negative pressure tank is relieved through the exhaust pipe; after the negative pressure tank is relieved, the negative pressure value in the negative pressure tank is less than the negative pressure value in the vacuum drainage system pipeline, so that the vacuum diaphragm valve is closed, and the vacuum drainage system pipeline is closed.

[0015] Optionally, the device based on the method comprises that the vacuum diaphragm valve is connected with an Internet of Things controller, an upper trigger connecting piece is arranged outside the diaphragm of the vacuum diaphragm valve, and a lower trigger connecting piece is arranged on the inner wall of the shell of the valve body of the vacuum diaphragm valve; the lower trigger connecting piece is connected with the Internet of Things controller.

[0016] The method comprises that when the vacuum diaphragm valve is opened, the upper trigger connecting piece and the lower trigger connecting piece of the diaphragm of the vacuum diaphragm valve are connected, and the Internet of Things controller displays a normal state; after the vacuum diaphragm valve is closed, the upper trigger connecting piece and the lower trigger connecting piece are disconnected, and the Internet of Things controller sends a fault alarm signal.

[0017] Compared with the conventional vacuum drainage system, the fault self-closing and monitoring positioning device can improve the stability of the operation of the vacuum drainage system and realize accurate positioning of the instability section.

[0018] Compared with the existing monitoring system, the existing monitoring system is generally installed in the vacuum lifter, and the installation position of the fault self-closing and monitoring positioning device is flexible, and the device can be installed in the main pipeline, the branch pipeline and important nodes.

[0019] Compared with the existing monitoring system, the existing monitoring system is generally installed in the vacuum lifter, and only the running state of the vacuum lifter can be monitored, the instability of the branch network and the main network cannot be monitored in real time, and one vacuum lifter corresponds to one set of monitoring system, so that the one-time investment cost is high, and the detachable battery and accessories need to be replaced regularly in the later period, which increases the operation and maintenance cost; the fault self-closing and monitoring positioning device can not only monitor the running state of the vacuum lifter, but also monitor the running state of the vacuum pipeline, so that the number of devices is greatly reduced on the premise of realizing the monitoring function, and the engineering construction cost and the later operation and maintenance cost are greatly reduced.

[0020] Compared with the existing monitoring system, the existing monitoring system is based on the Internet of Things technology means, only can realize the monitoring of the running state, cannot realize the self-closing function of the unstable system, once the system is unstable, the system will continue to run, due to the need for maintenance for a certain period of time, to a certain extent, increase the energy consumption of the system operation, the fault self-closing and monitoring positioning device described in the application can realize the leakage monitoring, and also can realize the self-closing of the leakage section, and timely cut off the unstable section, thereby reducing the operation energy consumption, and has high economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a partial pipe network structure schematic diagram of the vacuum drainage system of an embodiment of the application.

[0022] Figure 2 It is a structure schematic diagram of the fault self-closing and monitoring positioning device of an embodiment of the application.

[0023] Figure 3 It is a structure schematic diagram of the Internet of Things controller of an embodiment of the application.

[0024] In the figure, 1 is a vacuum drainage system pipeline, 2 is a vacuum diaphragm valve, 3 is a negative pressure tank, 4 is a second pressure gauge, 5 is a stable air pipe, 6 is an air inlet bypass pipe, 7 is a one-way valve 1, 8 is a first valve, 9 is a first pressure gauge, 10 is a second valve, 11 is a trigger, 12 is an exhaust pipe, 13 is an Internet of Things controller, 14 is an upper trigger connecting piece, 15 is a lower trigger connecting piece, 16 is a vacuum drainage system main pipeline, 17 is a vacuum drainage system branch pipeline, 18 is a leakage monitoring and self-closing device, 19 is a vacuum pump station, and 20 is a water collecting unit. DETAILED DESCRIPTION

[0025] The vacuum diaphragm valve described in the application can use the existing vacuum diaphragm valve or vacuum interface valve. A specific structure is that the valve body is provided with an inlet and an outlet, and the valve body contains two upper and lower diaphragms, and the diaphragm has elasticity. The vacuum diaphragm valve can realize the following functions: when the pressure value in the two diaphragms is greater than the pressure value outside the diaphragm, the diaphragm bulges outward, the space between the two diaphragms is opened, the valve body is opened, the fluid can pass through the space between the two diaphragms, and the flow in and out of the valve body is realized; when the pressure value in the two diaphragms is less than the pressure value outside the diaphragm, the diaphragm is concave inward, the two diaphragms are closed, the space between the two diaphragms is closed, the valve body is closed, and the fluid cannot pass through the vacuum diaphragm valve.

[0026] The vacuum drainage system according to the present application is used for collecting sewage of each water using unit. In a specific embodiment, the vacuum drainage system is composed of three parts, i.e. vacuum lifters, vacuum drainage pipelines and vacuum pump stations. The vacuum lifters are installed at each sewage discharge point and comprise controllers, liquid level sensors, vacuum diaphragm valves and boxes, etc. and are used for collecting sewage of each sewage discharge point of a building to form a water collecting unit, which is the upstream of the whole vacuum drainage system. The vacuum lifters are connected with the sewage discharge units at normal pressure on one side and the negative pressure vacuum drainage system on the other side. The vacuum pump stations are located at the downstream end of the whole vacuum drainage system and generate negative pressure, which is transmitted through the vacuum drainage pipeline network and collects sewage in the upstream water collecting unit. The fault self-closing and monitoring positioning device according to the present application is arranged in the vacuum drainage pipeline / pipeline network to realize self-closing and state monitoring of the vacuum drainage system in case of leakage.

[0027] The upstream and downstream according to the present application are divided according to the flow direction of water. That is, the sewage discharge point is the upstream end of the vacuum drainage system, the vacuum pump station at the end of the vacuum drainage pipeline network is the downstream end of the sewage, and under the action of negative pressure, water flows from the upstream to the downstream in the pipeline network.

[0028] The pipeline of the vacuum drainage system according to the present application refers to the pipeline in the vacuum drainage pipeline network, including main pipelines or branch pipelines, etc.

[0029] The magnitude of the negative pressure value according to the present application refers to the absolute value of the pressure under negative pressure, and the greater the negative pressure value, the higher the vacuum degree. The decrease of the negative pressure value refers to the decrease of the vacuum degree. If the absolute pressure value is used, the decrease of the negative pressure value may be, for example, from -20 kPa to -2 kPa or from -10 kPa to 10 kPa. For another example, when the negative pressure value of space A is greater than that of space B, and A and B are connected, the fluid in space B will flow from B to A under the pressure difference.

[0030] A specific embodiment of the vacuum drainage system according to the present application is shown in Figure 1 The vacuum drainage system comprises a main pipeline 16 and a plurality of branch pipelines 17. The upstream end of each branch pipeline 17 is connected with a water collecting unit 20 (containing a vacuum lifter) of each sewage discharge point, the downstream end of each branch pipeline 17 is connected with the main pipeline 16, and the downstream end of the main pipeline 16 is connected with a vacuum pump station 19. The vacuum pump station 19 is generally provided with a vacuum tank, a vacuum pump, a sewage pump, etc. and the power of the whole vacuum drainage system comes from the vacuum pump station 19. The fault self-closing and monitoring positioning device 18 according to the present application is arranged on each branch pipeline 17 and the main pipeline 16. In addition, the fault self-closing and monitoring positioning device 18 according to the present application can also be arranged at important node positions of the system which need to be monitored.

[0031] A specific embodiment of the fault self-closing and monitoring positioning device according to the present application is shown inFigure 2 As shown. Including vacuum membrane valve 2, negative pressure tank 3, second pressure gauge 4, stable air pipe 5, air inlet bypass pipe 6, one-way valve 7, first valve 8, first pressure gauge 9, second valve 10, trigger 11, exhaust pipe 12, Internet of Things controller 13 arranged in the vacuum drainage system pipeline 1. The upstream of the vacuum drainage system pipeline 1 is connected with a water collecting unit, i.e. a sewage discharge point, and the downstream end is connected with a vacuum pump station. The vacuum drainage system pipeline 1 is in a vacuum state in the running state, and the conveying medium is sewage, which is a gas-liquid two-phase flow.

[0032] The vacuum membrane valve 2 or the vacuum interface valve, the upper and lower diaphragm outer sides are connected with the negative pressure tank 3 through the stable air pipe 5. Through the connection of the stable air pipe 5, the pressure of the outer side of the diaphragm of the vacuum membrane valve 2 is derived from the negative pressure tank 3, and the internal pressure between the diaphragms is derived from the vacuum drainage system pipeline 1. Therefore, the pressure difference in the two spaces of the negative pressure tank 3 and the vacuum drainage system pipeline 1 will determine the opening or closing of the vacuum membrane valve 2.

[0033] The negative pressure tank 3 is also connected with the vacuum drainage system pipeline 1 through the air inlet bypass pipe 6, and the connection between the vacuum drainage system pipeline 1 and the air inlet bypass pipe 6 is located downstream of the vacuum membrane valve. The air inlet bypass pipe 6 is provided with a one-way valve and a first valve. The one-way valve can be arranged at one end of the air inlet bypass pipe 6 close to the vacuum drainage system pipeline 1, and the first valve can be arranged at one end of the air inlet bypass pipe 6 close to the negative pressure tank 3. The direction of the one-way valve is controlled to allow fluid to flow only from the negative pressure tank 3 to the vacuum drainage system pipeline 1, realizing the one-way flow demand of the negative pressure tank 3 to the vacuum drainage system pipeline 1. The second pressure gauge 4 is arranged on the negative pressure tank 3, which is used to monitor the pressure in the negative pressure tank 3 in real time. The first valve 8 is an electromagnetic valve, which can be automatically controlled to open or close when the pressure of the negative pressure tank 3 meets certain conditions. Preferably, the second pressure gauge 4 is interlocked with the first valve 8.

[0034] The first pressure gauge 9 is arranged on the vacuum drainage system pipeline 1, which is located upstream of the vacuum membrane valve 2, realizing the monitoring of the pressure value in the vacuum drainage system pipeline 1. The negative pressure tank 3 is connected with the exhaust pipe 12, and the exhaust pipe 12 is provided with the second valve 10; the second valve 10 is an electromagnetic valve, which can be opened or closed through an external power source or a mobile detachable battery, and can be automatically controlled to open or close when the pressure of the vacuum drainage system pipeline 1 meets certain conditions. Preferably, the first pressure gauge 9 is connected with the trigger 11, and the second valve 10 is interlocked with the trigger 11, more specifically, the trigger 11 is arranged between the first pressure gauge 9 and the second valve 10, can receive the negative pressure value fed back by the first pressure gauge 9, and send signals, thereby realizing the opening or closing of the second valve 10.

[0035] The fault self-closing and monitoring positioning device of the application further comprises a state monitoring device, preferably an Internet of Things controller 13, for monitoring the state of the diaphragm closing and opening of the vacuum diaphragm valve. As a specific embodiment, the vacuum diaphragm valve 2 is connected to the Internet of Things controller 13. As shown in Figure 3 more particularly, an upper trigger connecting piece 14 is arranged outside the diaphragm of the vacuum diaphragm valve 2, and a lower trigger connecting piece 15 is arranged on the inner wall of the shell of the valve body of the vacuum diaphragm valve; the lower trigger connecting piece 15 is connected to the Internet of Things controller 13. The Internet of Things controller 13 can be powered by a mobile detachable battery.

[0036] The device of the application can also be electrically connected or signal communication connected with each pressure gauge, each valve and the like through a centralized control system, so as to realize the automatic state monitoring and on-off control of each pressure gauge and each valve in the device system. The control system collects pressure value data of each pressure gauge, valve opening and closing state data of each valve (including the first valve, the second valve and the vacuum diaphragm valve), and realizes the monitoring and automatic control of each instrument and meter in the device through program setting, such as setting the pressure value to meet certain conditions to open or close a valve.

[0037] On the basis of the above-mentioned scheme, the specific operation principle and process of the fault self-closing and monitoring positioning device of the application are as follows.

[0038] a. Starting and vacuumizing the negative pressure tank

[0039] During the starting of the vacuum drainage system, the vacuum drainage system pipeline 1 forms a negative pressure vacuum through the action of the vacuum pump station at the tail end, at this time the first valve 8 is opened, and the negative pressure tank 3 is vacuumized through the air inlet bypass pipe 6. The negative pressure in the vacuum drainage system is in a fluctuating state during the starting, and the one-way valve 7 has the function of controlling one-way flow, so that the negative pressure value in the negative pressure tank 3 only rises but does not fall during the fluctuation of the negative pressure in the vacuum drainage system, and therefore after a period of time, the negative pressure tank 3 will obtain a maximum negative pressure value, which is set as the first negative pressure threshold value. When the negative pressure value of the negative pressure tank remains stable, the first valve 8 is closed at this time to maintain the maximum negative pressure value in the negative pressure tank, so as to avoid the pressure relief of the negative pressure tank to the vacuum drainage system pipeline.

[0040] For the first negative pressure threshold value, in some specific embodiments, the negative pressure tank pressure requirement in the downstream vacuum pump station is-0.06MPa~ -0.07MPa vacuum in the normal operation state of the vacuum drainage system, and the pressure requirement in the vacuum drainage system pipeline is generally-0.07MPa~ -0.08MPa vacuum during the system operation debugging. The value of the above-mentioned first negative pressure threshold value can be selected by referring to the above-mentioned pressure requirement.

[0041] b. Normal operation of the vacuum drainage system

[0042] Through the above-mentioned debugging during the start-up, the negative pressure tank 3 is in the maximum negative pressure state, and the maximum negative pressure value (the first negative pressure threshold value) is the maximum negative pressure value in the negative pressure fluctuation state during the start-up. Therefore, during the normal operation, the normal negative pressure value in the vacuum drainage system pipeline 1 is less than the maximum negative pressure value in the negative pressure tank 3. The negative pressure tank 3 and the vacuum diaphragm valve 2 are connected through the stabilizing air pipe 5. Under the action of the pressure difference, the diaphragm of the vacuum diaphragm valve 2 is opened, the vacuum diaphragm valve 2 is opened, and a normally open state is formed. The vacuum drainage system pipeline 1 at the place of the device is connected, and the normal operation of the vacuum drainage system is realized.

[0043] c. Self-closing in the abnormal state of the vacuum drainage system

[0044] The vacuum diaphragm valve 2 is in a normally open state, and the system remains stable. Once the vacuum drainage system fails or is unstable, for example, the vacuum diaphragm valve in the vacuum lifter upstream of the device is blocked by foreign matter, the vacuum lifter has other faults, the vacuum pipeline is damaged and leaks at some place, etc. At this time, the vacuum drainage system fails and is in an unstable state, and the negative pressure value in the pipeline decreases. At this time, the negative pressure value of the first pressure gauge 9 decreases, and when the negative pressure value decreases to a preset value (the second negative pressure threshold value), the second valve 10 is opened. Preferably, the second valve 10 is opened by triggering the signal of the trigger 11, and the negative pressure tank 3 is relieved through the exhaust pipe 12. Preferably, the electromagnetic valve of the control second valve 10 has a very small opening degree, so as to realize slow relief of the negative pressure tank 3, and finally form a normal pressure state in the negative pressure tank 3. The second negative pressure threshold value, i.e., the setting value of each trigger, can be set by calculation or experience value according to the position of the device in the vacuum drainage system.

[0045] For the second negative pressure threshold value, similarly, in some specific embodiments, the negative pressure tank pressure requirement in the downstream vacuum pump station is-0.06Mpa~ -0.07MPa vacuum during the normal operation of the vacuum drainage system, and the pressure in the vacuum drainage system pipeline during the system operation debugging is generally-0.07MPa~ -0.08MPa vacuum. The value of the above-mentioned second negative pressure threshold value can be selected by referring to the above-mentioned pressure requirement.

[0046] In the pressure relief process of the negative pressure tank 3, the negative pressure value in the negative pressure tank 3 gradually decreases to normal pressure; when the negative pressure value in the negative pressure tank 3 is less than the negative pressure value in the vacuum drainage system pipeline 1, the diaphragm of the vacuum diaphragm valve 2 is closed under the action of the pressure difference, the vacuum diaphragm valve 2 is closed, the vacuum drainage system pipeline 1 (more specifically, the pipeline section on the upstream side of the vacuum diaphragm valve 2) in which the device is located is closed, that is, the automatic closing of the unstable section of the vacuum drainage system is realized. After closing, the vacuum drainage system pipeline 1 on the downstream side of the vacuum diaphragm valve or other main pipelines or branch pipelines in the vacuum drainage system pipeline network can still maintain normal operation.

[0047] d. Instability monitoring of the vacuum drainage system

[0048] Optionally, the opening and closing states of each vacuum diaphragm valve 2 in the system are monitored by the control system, and when an abnormal closing of a vacuum diaphragm valve in the vacuum drainage system occurs, the system can locate the pipeline section in which the vacuum diaphragm valve 2 is located. More specifically, an Internet of Things controller 13 can be connected with the vacuum diaphragm valve 2 to monitor the opening and closing states of the vacuum diaphragm valve 2 in the device. In a preferred manner, trigger connection pieces are respectively arranged on the outer side of a diaphragm and the inner wall of a valve body shell in the vacuum diaphragm valve 2. In a normal operation state, the vacuum diaphragm valve 2 is in a normally open state, at which time the upper trigger connection piece 14 is connected with the lower trigger connection piece 15 and is connected with the Internet of Things controller 13, indicating that the system is in a normal state. When the vacuum drainage system is unstable and the vacuum diaphragm valve 2 is closed, the two trigger connection pieces are disconnected, the Internet of Things controller 13 is disconnected, and the Internet of Things controller 13 will send a leakage or fault alarm signal, indicating that the vacuum drainage system (more specifically, the upstream of the vacuum drainage system pipeline in which the device is located) in which the device is located has a fault, thereby realizing the leakage monitoring and rapid positioning of the vacuum drainage system.

[0049] The above are examples of operating conditions in a normal operation state and a fault state. When the system is unstable and has a fault, the system can timely locate the unstable section and perform self-closing, at which time maintenance personnel timely maintain the unstable section. Before the next normal operation period starts, the maintenance personnel will restore the system again according to the above operation.

[0050] The present application has been described in detail with reference to specific embodiments and exemplary examples, but these descriptions are not to be construed as limiting the present application. Those skilled in the art understand that various equivalent substitutions, modifications or improvements can be made to the technical solutions and embodiments of the present application without departing from the spirit and scope of the present application, and these all fall within the scope of the present application.

Claims

1. A fault self-closing and monitoring positioning device for a vacuum drainage system, characterized in that, The vacuum drainage system pipeline is connected with the negative pressure tank through an air inlet bypass pipe, and the connection between the vacuum drainage system pipeline and the air inlet bypass pipe is located downstream of the vacuum diaphragm valve; a one-way valve and a first valve are arranged on the air inlet bypass pipe; a first pressure gauge is arranged on the vacuum drainage system pipeline, and the first pressure gauge is located upstream of the vacuum diaphragm valve; the negative pressure tank is provided with a second pressure gauge, and is connected with an exhaust pipe, and the exhaust pipe is provided with a second valve; The second pressure gauge is interlocked with the first valve, so that when the negative pressure value in the negative pressure tank is the maximum negative pressure value of the negative pressure tank, the first valve is closed; the size of the negative pressure value is the size of the absolute value of the negative pressure; the first pressure gauge is connected with a trigger, and the second valve is interlocked with the trigger, so that when the vacuum drainage system fails and the negative pressure value of the first pressure gauge drops to a second negative pressure threshold, the second valve is opened; The vacuum diaphragm valve is connected with an Internet of Things controller for monitoring the opening and closing state of the vacuum diaphragm valve. The control system is connected with the first pressure gauge, the second pressure gauge, the first valve and the second valve.

2. The fail-safe and monitoring positioning device of claim 1, wherein, An upper trigger connecting piece is arranged on the outer side of the diaphragm of the vacuum diaphragm valve, and a lower trigger connecting piece is arranged on the inner wall of the shell of the valve body of the vacuum diaphragm valve; the lower trigger connecting piece is connected with the Internet of Things controller.

3. The fail-safe and monitoring positioning device of claim 1, wherein, The upstream of the vacuum drainage system pipeline is connected with a water collecting unit, and the downstream end is connected with a vacuum pump station.

4. The fail-safe and monitoring positioning device of claim 1, wherein, The fault self-closing and monitoring positioning device of any one of claims 1-4 is included.

5. A vacuum drainage system, characterized in that The main pipeline and a plurality of branch pipelines are included; the upstream end of each branch pipeline is connected with a water collecting unit, and the downstream end is connected with the main pipeline; the downstream end of the main pipeline is connected with a vacuum pump station; the fault self-closing and monitoring positioning device is arranged on each branch pipeline and / or the main pipeline.

6. The vacuum drainage system according to claim 5, characterized in that The fault self-closing and monitoring positioning device of any one of claims 1-4 and / or the vacuum drainage system of claim 5 or 6 is performed.

7. A method for vacuum drainage system fault self-closing and monitoring positioning, characterized in that, 8. The vacuum drainage system fault self-closing and monitoring positioning method of claim 7, wherein The vacuum drainage system is opened, the first valve and the one-way valve on the air inlet bypass pipe are opened, the vacuum drainage system pipeline generates negative pressure through the vacuum pump station at the downstream end, the negative pressure tank is vacuumized, and when the negative pressure value in the negative pressure tank reaches the maximum negative pressure value of the negative pressure tank, the first valve is closed; the maximum negative pressure value of the negative pressure tank is greater than the normal negative pressure value in the vacuum drainage system pipeline, so that the vacuum diaphragm valve is opened, the upstream and downstream of the vacuum drainage system pipeline are connected, and the vacuum drainage system is normally operated; When the vacuum drainage system fails and the negative pressure value of the vacuum drainage system pipeline decreases, the first pressure gauge drops to a second negative pressure threshold, the second valve is opened, and the negative pressure tank is relieved through the exhaust pipe; after the negative pressure tank is relieved, the negative pressure value in the negative pressure tank is less than the negative pressure value in the vacuum drainage system pipeline, so that the vacuum diaphragm valve is closed, and the vacuum drainage system pipeline is closed. ​ 9. The method of claim 8, wherein, The vacuum diaphragm valve is connected with an Internet of Things controller, an upper trigger connecting piece is arranged outside the diaphragm of the vacuum diaphragm valve, and a lower trigger connecting piece is arranged on the inner wall of the shell of the valve body of the vacuum diaphragm valve; the lower trigger connecting piece is connected with the Internet of Things controller; When the vacuum diaphragm valve is opened, the upper trigger connecting piece of the diaphragm of the vacuum diaphragm valve is connected with the lower trigger connecting piece, and the Internet of Things controller displays a normal state; after the vacuum diaphragm valve is closed, the upper trigger connecting piece is disconnected from the lower trigger connecting piece, and the Internet of Things controller sends a fault alarm signal.

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