Monitoring system and monitoring method for vacuum type liquid collection device

Abstract

To provide a monitoring system for a vacuum type liquid collection device, which can quickly respond to an abnormality in a vacuum valve unit.SOLUTION: A monitoring system includes a central monitoring device 102, a liquid collection tank pressure detection device 106 capable of wirelessly transmitting detection results of the pressure in the gas phase part of a liquid collection tank 202 to the central monitoring device 102, and a vacuum valve unit pressure detection device 104 including a wireless transmission unit capable of wirelessly transmitting detection results of the pressures in the discharge pipes of multiple vacuum valve units 50 to the central monitoring device 102. When the pressure in the gas phase part of the liquid collection tank 202 is equal to or higher than a first threshold value, the liquid collection tank pressure detection device 106 issues a liquid collection tank vacuum reduction alarm to the central monitoring device 102. The central monitoring device 102 displays on the monitoring screen a list of the pressures in the discharge pipes of the multiple vacuum valve units 50 at the time when the liquid collection tank vacuum reduction alarm is issued or at the time when it is restored, and the pressures in the gas phase part of the liquid collection tank.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a monitoring system for use in a vacuum liquid collection apparatus such as a vacuum sewer system, etc. The present invention also relates to a monitoring method for a vacuum liquid collection apparatus. [Background technology]

[0002] Conventionally, one of the devices for collecting wastewater from a large number of houses is a vacuum wastewater collection device. As an example, as shown in FIG. 8, the vacuum wastewater collection device includes a vacuum valve unit 3 having a wastewater basin in which wastewater from each house 1 is stored. The vacuum wastewater collection device also includes a vacuum station 7 in which the wastewater from the vacuum valve unit 3 is collected through a vacuum pipe 4. The vacuum station 7 includes a collection tank 5 for receiving the wastewater from the vacuum pipe 4, and a vacuum pump 6. The vacuum pump 6 introduces negative pressure into the collection tank 5 and the vacuum pipe 4.

[0003] FIG. 9 shows an example of the configuration of a conventional vacuum valve unit 3. Wastewater from each home 1 flows into a sewage inlet 31 of the vacuum valve unit 3 through an underground gravity drainage pipe 2. A vacuum valve 40 is provided in a discharge pipe (in other words, a suction pipe) 32 of the sewage inlet 31. A water level detector (not shown) is also provided in the sewage inlet 31 to detect the water level of the sewage stored in the sewage inlet 31. The vacuum valve 40 is configured to open and close according to the output of the water level detector. When a certain amount of sewage is stored in the sewage inlet 31, the valve body 41 opens. When the valve body 41 of the vacuum valve 40 opens, the sewage in the sewage inlet 31 is sucked into the discharge pipe 32 by negative pressure introduced from the vacuum pump 6 through the vacuum pipe 4 and the discharge pipe 32. The sucked sewage is sucked into the vacuum pipe 4 from the discharge pipe 32 and collected in the water collection tank 5 of the vacuum station 7. The wastewater collected in the water collection tank 5 is discharged via a pressure pump 8 to a wastewater treatment facility (not shown).

[0004] For example, as shown in FIG. 10, the vacuum pipelines 4 form a pipeline network laid underground, and the vacuum valve units 3 of each home 1 are arranged in this pipeline network. Note that FIG. 10 shows one system of vacuum pipelines 4 as an example. However, the vacuum pipelines 4 are often divided into multiple systems. The multiple systems are connected to the same liquid collection tank and form pipeline networks independent of each other. In each system, multiple vacuum valve units 3 are connected by the vacuum pipelines 4. The vacuum pipelines 4 are divided into multiple systems for the purposes of reducing the range of influence when an abnormality occurs and making it easier to find the location of the abnormality.

[0005] When the scale of a vacuum sewage collection system is relatively large, sewage is collected from vacuum valve units 3 installed in dozens to hundreds of locations into the collection tank 5 of the vacuum station 7. When designing a vacuum sewage collection system, the set pressure of the vacuum station 7 is, for example, -60 to -70 kPa, and the vacuum required by the vacuum valve units 3 is usually -25 kPa (Vacuum Sewage Collection System Technical Manual (2002 Edition) Edited by Tamaki Tsutomu, Published by the Sewerage New Technology Promotion Organization, published on March 31, 2002).

[0006] Generally, a decrease in the degree of vacuum in the collecting tank 5 is reported as an abnormality in the vacuum station 7 by, for example, a vacuum station abnormality reporting device 13 (see FIG. 8) provided on the power control panel 12 of the vacuum station 7. For example, a failure or excessive operation of the vacuum pump 6, a failure of the pressure pump 8, an abnormal or high water level in the collecting tank 5, etc. can be reported by the vacuum station abnormality reporting device 13. Meanwhile, the maintenance and inspection work of the vacuum valve units 3 provided at tens to hundreds of locations in the pipeline network of the vacuum pipeline 4 is a heavy burden for the manager and maintenance inspector of the vacuum sewage collection system (hereinafter, the manager, etc.).

[0007] Patent document 1 describes a vacuum valve monitoring device for a vacuum wastewater collection system. In the present invention, the monitoring device is equipped with a sensor that can detect the open / closed state of the vacuum valve, and an alarm device that measures the duration of the open or closed state of the vacuum valve and issues an alarm when the duration of the open or closed state exceeds a set value. The alarm device is connected to the sensor by a signal transmission line and is attached to the wall or the like of each home.

[0008] In the monitoring device of Patent Document 1, an alarm device is provided for each vacuum valve. The manager of the vacuum sewage collection system receives reports from residents of each household who hear the alarm, and investigates the vacuum valve (usually installed in a manhole) where an abnormality has been detected. In such on-site reporting type monitoring devices, there is a significant delay between the occurrence of an abnormality in a vacuum valve and the response.

[0009] In the pipeline network of vacuum pipelines 4 as shown in FIG. 10, when a vacuum drop (for example, a vacuum lower than −25 kPa) occurs in one vacuum valve unit 3, a secondary drop in vacuum may occur around the vacuum valve unit 3 through the pipeline network. It is difficult to predict the occurrence of such a secondary abnormality. A secondary drop in vacuum is usually not found until the water level of the sewage inlet 31 becomes abnormally high in multiple vacuum valve units 3 around the vacuum valve unit 3. As a result, the response to the secondary damage is delayed, the vacuum level of the entire pipeline network decreases, and normal sewage collection may not be possible. In the device of Patent Document 1, there is a risk that the above-mentioned secondary damage may be amplified between the occurrence of the vacuum valve abnormality and the response.

[0010] In contrast to the vacuum valve unit monitoring device of the on-site reporting type as in Patent Document 1, Patent Document 2 describes a central monitoring device. Specifically, Patent Document 2 describes a central monitoring device that can identify the location of an abnormality by integrating and processing abnormality detection signals (contact signals) from multiple vacuum valve units of a vacuum-type wastewater collection device and abnormality detection signals (contact signals) from a vacuum station. The vacuum valve unit includes a vacuum valve sensor and a vacuum valve abnormality reporting device that is connected to the vacuum valve sensor by a cable and installed in each home. If the open state of the vacuum valve continues for a predetermined time or longer, a vacuum valve abnormality detection signal is output from the vacuum valve abnormality reporting device to the central monitoring device by wired or wireless communication. When the central monitoring device determines that the vacuum valve is the location of the abnormality, it reports the abnormality of the vacuum valve to a manager or the like via a reporting unit of the central monitoring device. Then, the manager or the like goes to the site to investigate the vacuum valve identified by the central monitoring device.

[0011] In the central monitoring device of Patent Document 2, the vacuum valve abnormality reporting device and the power control panel of the vacuum station can be connected to the central monitoring device so as to be capable of wireless communication. In the central monitoring device of Patent Document 2, a single monitoring device monitors multiple contacts collectively, thereby solving the problem of the rising cost of wireless communication devices. In addition, since the central monitoring device reports, the manager can respond to the abnormality of the vacuum valve more quickly than in the field reporting system. However, the manager must visually check the specific malfunction on site. In other words, the manager must visually check the malfunction on site to identify the specific malfunction, such as whether the abnormality in the open duration of the vacuum valve is due to the high water level in the sewage inlet or a malfunction of the vacuum valve itself.

[0012] Furthermore, the device of Patent Document 2 is insufficient in terms of preventive measures against the above-mentioned secondary damage.

[0013] Patent Document 3 also describes an apparatus that monitors the pressure condition of a vacuum pipeline using pressure monitoring means installed at the end and middle of the vacuum pipeline. The pressure monitoring means are connected to the respective wireless reporting devices. The wireless reporting devices are connected to the local government's management computer or the like via a general telephone line. When each pressure monitoring means detects an abnormality, it reports to the local government's management computer or the like via the wireless reporting device. In the apparatus of Patent Document 3, wireless reporting devices are installed at multiple locations in the vacuum pipeline. This reduces the cost of installing and maintaining the wireless devices compared to installing a wireless reporting device in each vacuum valve unit. However, it is not possible to directly identify the vacuum valve unit in which a vacuum valve opening / closing abnormality has occurred. [Prior art documents] [Patent documents]

[0014] [Patent Document 1] Special Publication No. 6-84640 [Patent Document 2] JP 2016-089548 A [Patent Document 3] JP 2007-277859 A Summary of the Invention [Problem to be solved by the invention]

[0015] According to one embodiment of the present invention, it is possible to provide a monitoring system for a vacuum type liquid collecting device that can solve at least one of the above problems. That is, according to one embodiment of the present invention, it is possible to provide a monitoring system for a vacuum type liquid collecting device that can quickly respond to an abnormality in the vacuum valve unit.

[0016] Furthermore, according to one embodiment of the present invention, it is possible to provide a monitoring system for a vacuum type liquid collection device that can prevent the spread of damage caused by a decrease in the degree of vacuum.

[0017] According to one embodiment of the present invention, a monitoring method for a vacuum type liquid collecting device that can solve at least one of the above problems can be provided. That is, according to one embodiment of the present invention, a monitoring method for a vacuum type liquid collecting device that can quickly respond to an abnormality in the vacuum valve unit can be provided.

[0018] Furthermore, according to one embodiment of the present invention, it is possible to provide a method for monitoring a vacuum type liquid collection device that can prevent the spread of damage caused by a decrease in the degree of vacuum. [Means for solving the problem]

[0019] According to one embodiment of the present invention, there can be provided a monitoring system for a vacuum type liquid collecting device that collects liquid stored in a plurality of vacuum valve units in a collecting tank under negative pressure, the monitoring system comprising a central monitoring device, a collecting tank pressure detection device that detects the pressure of a gas phase part of the collecting tank and is capable of wirelessly transmitting the detection result of the pressure of the gas phase part of the collecting tank to the central monitoring device, and a vacuum valve unit pressure detection device that is provided corresponding to each of the plurality of vacuum valve units and includes a pressure detection unit that detects at least the pressure in the discharge pipe of the vacuum valve unit and a wireless transmission unit that is capable of wirelessly transmitting the detection result of the pressure detection unit to the central monitoring device. A first threshold value is set for the pressure of the gas phase part of the collecting tank in the monitoring system. The collecting tank pressure detection device is configured to generate a collecting tank vacuum degree reduction alarm to the central monitoring device when the pressure of the gas phase part of the collecting tank is equal to or higher than the first threshold value, and the central monitoring device is configured to generate data for a monitoring screen of the vacuum type liquid collecting device at the time when the collecting tank vacuum degree reduction alarm is generated and at the time when the collecting tank vacuum degree reduction alarm is restored. The monitoring screen displays a list of the pressures in the discharge pipes of the vacuum valve units and the pressure in the gas phase of the liquid collection tank at the time when the liquid collection tank vacuum drop alarm occurs or is restored.

[0020] According to one embodiment of the present invention, there is provided a method for monitoring a vacuum type liquid collection device that collects liquid stored in a plurality of vacuum valve units in a collection tank under negative pressure. The method includes the steps of a collection tank pressure detection device and a vacuum valve unit pressure detection device detecting the pressure of the gas phase part of the collection tank and the pressure inside the discharge pipe of the vacuum valve unit, respectively, and outputting the detection results to a central monitoring device, a step of the collection tank pressure detection device generating a collection tank vacuum degree drop alarm to the central monitoring device when the pressure of the gas phase part of the collection tank is equal to or higher than a first threshold value that is a collection tank pressure threshold value, a step of the central monitoring device generating data for a first monitoring screen of the vacuum type liquid collection device and simultaneously sending an email to the communication terminal when the collection tank vacuum degree drop alarm is generated, a step of the central monitoring device displaying the first monitoring screen on the communication terminal, and a step of the collection tank pressure detection device outputting the detection results to a central monitoring device. The method includes the steps of: when the collection tank vacuum level drop alarm is reset, the central monitoring device generates data for a second monitoring screen of the vacuum type liquid collection device and simultaneously sends an email to the communication terminal; and the central monitoring device displays the second monitoring screen on the communication terminal. The first monitoring screen displays a list of pressures in the discharge pipes of the multiple vacuum valve units and the pressure in the gas phase of the collection tank at the time the collection tank vacuum level drop alarm is generated. The second monitoring screen displays a list of pressures in the discharge pipes of the multiple vacuum valve units and the pressure in the gas phase of the collection tank at the time the collection tank vacuum level drop alarm is reset. [Brief description of the drawings]

[0021] [Figure 1] 1 is a diagram showing an overall overview of a monitoring system according to a first embodiment of the present invention. [Diagram 2] 1 is a schematic configuration diagram showing a vacuum valve unit pressure detection device according to a first embodiment. FIG. [Diagram 3] 3A and 3B are diagrams illustrating an example of installation of a vacuum valve unit pressure detection device according to a first embodiment. [Figure 4] FIG. 2 is a functional block diagram of the central monitoring device according to the first embodiment. [Figure 4A] FIG. 13 is a diagram showing an example of a function indicating the relationship between the pressure in the water level detector pipe and the water level. [Diagram 5] FIG. 4 is a diagram showing an example of a monitoring screen according to the first embodiment. [Figure 6A] 4 shows an example of a processing flow of the monitoring system according to the first embodiment. [Figure 6B] 4 shows an example of a processing flow of the monitoring system according to the first embodiment. [Figure 7A] FIG. 11 is a diagram showing an example of a monitoring screen according to the second embodiment. [Figure 7B] FIG. 11 is a diagram showing an example of a monitoring screen according to the second embodiment. [Figure 8] FIG. 1 is a schematic diagram showing an example of the configuration of a vacuum wastewater collection device according to the prior art. [Figure 9] FIG. 1 is a diagram illustrating an example of the configuration of a vacuum valve unit according to a conventional technique. [Figure 10] FIG. 1 is a diagram showing an example of a vacuum pipeline network of a vacuum wastewater collection device according to the prior art. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, each embodiment of the present invention will be described with reference to the drawings. Note that the following description is merely an example, and is not intended to limit the technical scope of the present invention to the following embodiment. In addition, in the drawings, the same or corresponding components are given the same reference numerals, and duplicated descriptions are omitted. [First embodiment]

[0023] According to a first embodiment of the present invention, there is provided a monitoring system for a vacuum type liquid collecting apparatus, which collects liquid stored in a plurality of vacuum valve units in a liquid collecting tank of a vacuum station under negative pressure. As described above, wastewater (in other words, liquid) discharged from each household is temporarily stored in a wastewater inlet of the vacuum valve unit, and then collected in the liquid collecting tank of the vacuum station through a vacuum pipe. The monitoring system is a system for monitoring the vacuum degree of the vacuum type liquid collecting apparatus so that normal wastewater collection is maintained. As shown in FIG. 1, the monitoring system 100 of the first embodiment includes a central monitoring device 102, a vacuum valve unit pressure detection device 104, and a liquid collecting tank pressure detection device 106. The central monitoring device 102 can be wirelessly connected to the vacuum valve unit pressure detection device 104 provided in the vacuum valve unit 50. The central monitoring device 102 can also be wirelessly connected to the liquid collecting tank pressure detection device 106 provided in the liquid collecting tank 202 installed in the vacuum station 200. For ease of understanding, in the first embodiment, the central monitoring device 102 monitors a single liquid collection tank 202 and all of the vacuum valve units 50 that store the liquid collected in the liquid collection tank 202. However, if necessary, the vacuum station 200 may be provided with a plurality of liquid collection tanks 202. In this case, liquid from the vacuum valve units 50 may be collected in each of the plurality of liquid collection tanks 202.

[0024] The vacuum valve unit pressure detection device 104 is provided in each of the plurality of vacuum valve units 50. The plurality of vacuum valve units 50 are connected to a single liquid collecting tank 202 independently of each other. The vacuum valve units 50 may be arranged in a vacuum pipeline consisting of multiple systems. Depending on the scale of the vacuum type liquid collection device, liquid from tens to hundreds of vacuum valve units 50 may be collected in the liquid collection tank 202 of the vacuum station 200. Therefore, the number of vacuum valve unit pressure detection devices 104 is not particularly limited.

[0025] The central monitoring device 102 can be configured by a general-purpose computer or a cloud computer. In this embodiment, the central monitoring device 102 is configured as a cloud computer constructed on the Internet. In this case, the central monitoring device 102 can be connected to the vacuum valve unit pressure detection device 104 and the liquid collection tank pressure detection device 106 via a gateway device (in other words, a relay device) not shown. The monitoring system 100 can also include a communication terminal 108 capable of communicating with the central monitoring device 102. The communication terminal 108 may be a general-purpose PC, tablet, smartphone, or the like that can be used by a remote administrator, etc. The number of communication terminals 108 is not particularly limited. When the central monitoring device 102 is a general-purpose computer, the central monitoring device 102 may be incorporated in, for example, a power control panel of the vacuum station 200, etc.

[0026] Fig. 2 is a schematic diagram of a vacuum valve unit pressure detection device 104 according to the first embodiment. The vacuum valve unit pressure detection device 104 is provided corresponding to each vacuum valve unit 50 of the vacuum type liquid collection device. In Fig. 2, the vacuum valve unit pressure detection device 104 is shown together with two pressure conduits 52, 54 for extracting the pressure of the corresponding vacuum valve unit 50. Note that the specific configuration of the vacuum valve unit 50 shown in the figure is one example and does not limit the embodiment of the present invention, but may be configured, for example, as follows.

[0027] As an example, the vacuum valve unit 50 shown in Fig. 2 includes a sewage manhole 55 in which sewage from each household is temporarily stored. A discharge pipe 56 connected to a vacuum pipeline (not shown), and a water level detector tube 58 are disposed in the sewage manhole 55. The water level detector tube 58 is provided to detect the water level in the vacuum valve unit 50 (specifically, the water level in the sewage manhole 55), and is a member that is conventionally known as a component of a vacuum valve unit. A water level sensor such as an electrode-type water level gauge (not shown) can be attached to the water level detector tube 58.

[0028] A vacuum valve 60 and a vacuum gate valve 62 are attached midway along the discharge pipe 56. The vacuum gate valve 62 is used to cut off the supply of vacuum to the vacuum valve 60 when the vacuum valve 60 breaks down, is replaced, is tested, or the like.

[0029] The valve body 64 of the vacuum valve 60 is normally biased in the valve closing direction by a spring 66. When the level of sewage in the sewage inlet 55 rises and the pressure in the water level detector tube 58 increases, a vacuum is transmitted to the chamber 70 of the vacuum valve 60 by the action of the vacuum controller 68. This causes the valve body 64 to be pulled up against the spring 66 and open. An example of the configuration of a vacuum valve 60 equipped with such a vacuum controller 68 is described in, for example, Japanese Patent Application Laid-Open No. 7-39362.

[0030] The vacuum valve unit pressure detection device 104 of the first embodiment includes a vacuum valve unit pressure detection section 104-1 (hereinafter, first pressure detection section 104-1) that detects the pressure (negative pressure) in the discharge pipe 56 of the vacuum valve unit 50, and a vacuum valve unit pressure detection section 104-2 (hereinafter, second pressure detection section 104-2) that detects the pressure (positive pressure) in the water level detection pipe 58. In the first embodiment, a conventionally known pressure sensor can be used as the first pressure detection section 104-1 and the second pressure detection section 104-2. The vacuum valve unit pressure detection device 104 includes a wireless transmission section 104-3 that wirelessly transmits the detection results of the first and second pressure detection sections 104-1 and 104-2 to the central monitoring device 102. The detection results of the first and second pressure detection units 104-1, 104-2 (in this embodiment, the pressure values ​​detected by the pressure sensors) are output as is to the wireless transmission unit 104-3, and then output from the wireless transmission unit 104-3 to the central monitoring device 102.

[0031] The first pressure detection unit 104-1 is configured to measure the pressure in the discharge pipe 56 via the pressure conduit 52. The pressure conduit 52 is attached to the discharge pipe 56 downstream of the vacuum valve 60 (more specifically, downstream in the direction in which the liquid flows out of the sewage manhole 55). The pressure conduit 52 is preferably attached downstream of the vacuum gate valve 62. In the first embodiment, the detection result of the first pressure detection unit 104-1 is also referred to as a discharge pipe pressure value. In the first embodiment, the degree of vacuum of the vacuum valve unit 50 is monitored based on the discharge pipe pressure value measured by the pressure sensor.

[0032] In the first embodiment, the second pressure detection unit 104-2 is configured to measure the pressure in the water level detection pipe 58 via the pressure conduit 54. When the water level of the vacuum valve unit 50 (specifically, the water level of the sewage manhole 55) rises, the pressure in the water level detection pipe 58 rises. As described later, the pressure in the water level detection pipe 58 is converted to a water level by the central monitoring device 102. In the first embodiment, a conventionally known pressure sensor can be used as the second pressure detection unit 104-2. In the first embodiment, the detection result of the second pressure detection unit 104-2 is also referred to as a pressure value in the water level detection pipe. In the first embodiment, the water level of the vacuum valve unit 50 is monitored based on the pressure value in the water level detection pipe measured by the pressure sensor.

[0033] However, according to another embodiment, instead of the pressure sensor, a pressure switch that turns on and off with respect to a predetermined pressure threshold may be used as the first pressure detection unit 104-1 and the second pressure detection unit 104-2. In this case, an on / off signal of the pressure switch with respect to the predetermined pressure threshold is output to the wireless transmission unit 104-3, and is output from the wireless transmission unit 104-3 to the central monitoring device 102.

[0034] In the first embodiment, as shown in FIG. 2, the first and second pressure detection units 104-1 and 104-2 and the wireless transmission unit 104-3 can be housed together in a waterproof case 110. The vacuum valve unit pressure detection device 104 can also include an independent power source 104-4 that supplies power to the first and second pressure detection units 104-1 and 104-2 and the wireless transmission unit 104-3. In this case, the independent power source 104-4 can be housed in the waterproof case 110 together with the first and second pressure detection units 104-1 and 104-2 and the wireless transmission unit 104-3. The wall of the waterproof case 110 has an opening 111 for leading the pressure conduit 52 and the pressure conduit 54 to the first pressure detection unit 104-1 and the second pressure detection unit 104-2, respectively. The opening 111 is sealed around the pressure conduits 52 and 54.

[0035] The independent power source 104-4 may be a battery device such as a lithium ion battery, or an energy harvesting device. As the energy harvesting device, a power generating device that utilizes sunlight, thermal change, vibration, or the like can be used.

[0036] 3(A) and (B) are diagrams showing an example of installation of a vacuum valve unit pressure detection device 104 equipped with a waterproof case 110. As shown in the figures, the vacuum valve unit 50 may be configured so that a main body (usually made of resin or concrete) forming a sewage inlet 55 is buried in the ground, and an upper opening of the main body is closed by a manhole cover 112. In this case, as shown in FIG. 3(A), the waterproof case 110 can be attached to the back of the manhole cover 112. Alternatively, as shown in FIG. 3(B), the waterproof case 110 can also be attached to the upper wall surface of the main body of the vacuum valve unit 50.

[0037] The vacuum valve unit pressure detection device 104 of the first embodiment has a wireless transmission unit 104-3, so no wiring for communication is required. Therefore, the vacuum valve unit pressure detection device 104 can be easily installed. In addition, in the first embodiment, substantially all of the components of the vacuum valve unit pressure detection device 104, including the independent power source 104-4, are housed in a single waterproof case 110. Therefore, the vacuum valve unit pressure detection device 104 can be made compact, which makes it easier to handle the vacuum valve unit pressure detection device 104. Furthermore, when the independent power supply 104-4 of the vacuum valve unit pressure detection device 104 is configured by an environmental power generation device, the vacuum valve unit pressure detection device 104 can be operated substantially permanently without the need to replace the power supply unit.

[0038] Although not shown, the collection tank pressure detection device 106 is configured to detect the pressure of the gas phase part of the collection tank 202 of the vacuum station 200 by a conventionally known method. The collection tank pressure detection device 106 can include a collection tank pressure detection unit that detects the pressure of the gas phase part of the collection tank 202 and a wireless transmission unit that wirelessly transmits the detection result of the collection tank pressure detection unit to the central monitoring device 102. The detection result from the collection tank pressure detection unit is input directly to the wireless transmission unit and output from the wireless transmission unit to the central monitoring device 102. In the first embodiment, a conventionally known pressure sensor can be used as the collection tank pressure detection unit. However, according to another embodiment, instead of the pressure sensor, a pressure switch that turns on and off at a predetermined pressure value may be used as the collection tank pressure detection unit. In the first embodiment, the vacuum degree of the collection tank is monitored based on the pressure value measured by the pressure sensor. The collection tank pressure detection unit of the collection tank pressure detection device 106 according to the first embodiment is configured to generate a collection tank vacuum drop alarm when the pressure in the gas phase of the collection tank 202 becomes equal to or higher than a predetermined threshold (in other words, the collection tank pressure threshold). The collection tank pressure detection unit of the collection tank pressure detection device 106 is configured to generate a collection tank vacuum recovery signal when the collection tank vacuum drop alarm is restored (i.e., when the pressure in the gas phase of the collection tank 202 becomes lower than the collection tank pressure threshold). Therefore, the collection tank pressure detection unit of the collection tank pressure detection device 106 can include a comparison unit that compares the measurement value of the pressure sensor with the collection tank pressure threshold. The comparison unit and wireless transmission unit of the collection tank pressure detection device 106 may be incorporated in a power control panel of the vacuum station 200 or the like.

[0039] 4 shows an example of a functional block diagram of the central monitoring device 102. As described above, the central monitoring device 102 may be a general-purpose computer or a cloud computer that is wirelessly connected to the wireless transmitter 104-3 of the vacuum valve unit detection device 104 and the wireless transmitter of the liquid collection tank pressure detection device 106. When the central monitoring device 102 is a general-purpose computer, the central monitoring device 102 may be incorporated in a power control panel of the vacuum station 200 or the like.

[0040] In the first embodiment, the central monitoring device 102 includes a determination unit 120 that functions as a central processing unit (CPU), a receiving unit 122 that is wirelessly connected to the vacuum valve unit pressure detecting device 104 and the liquid collection tank pressure detecting device 106, a storage unit 124 that stores and accumulates received data, and a communication unit 126 that communicates with the communication terminal 108 via the Internet. The central monitoring device 102 also includes a monitoring screen generating unit 128, which will be described later.

[0041] In the central monitoring device 102, the receiving unit 122 receives the detection results of the vacuum valve unit pressure detection device 104 (specifically, the first and second pressure detection units 104-1, 104-2) and the collection tank pressure detection device 106. The received detection results (i.e., the pressure value in the discharge pipe, the pressure value in the water level detection pipe, and the pressure value of the gas phase part of the collection tank) may be output as is to the determining unit 120. The receiving unit 122 can also receive a collection tank vacuum degree drop alarm signal and a collection tank vacuum degree recovery signal from the collection tank pressure detection device 106.

[0042] In the first embodiment, a first threshold value (corresponding to the above-mentioned collection tank pressure threshold value) is set in the central monitoring device 102 for the pressure value of the gas phase part of the collection tank 202. A second threshold value is set for the pressure value inside the discharge pipe. A third threshold value is set for the pressure value inside the water level detection pipe (and thus the water level of the vacuum valve unit 50). The relationship between the pressure value inside the water level detection pipe and the water level can be determined, for example, according to a function as shown in FIG. 4A. This function is determined depending on the specific shape and volume of the water level detector tube 58. Therefore, the function can be calculated in advance based on data collected through experiments or the like, and stored in the memory unit 124 of the central monitoring device 102.

[0043] The determination unit 120 can compare the pressure value of the gas phase part of the liquid collection tank 202 input from the receiving unit 122 with a first threshold value to determine whether they are larger or smaller. Alternatively, the determination unit 120 can determine whether the pressure value of the gas phase part of the liquid collection tank 202 is larger or smaller than the first threshold value based on whether or not a liquid collection tank vacuum drop alarm signal has been received from the liquid collection tank pressure detection device 106 (i.e., if a liquid collection tank vacuum drop alarm signal has been received, the pressure value of the gas phase part of the liquid collection tank 202 is equal to or larger than the first threshold value, and if a liquid collection tank vacuum drop alarm signal has not been received, the pressure value of the gas phase part of the liquid collection tank 202 is smaller than the first threshold value). Also, the determination unit 120 can compare the discharge pipe pressure value input from the receiving unit 122 with a second threshold value to determine whether they are larger or smaller. Also, the determination unit 120 can compare the water level detection pipe pressure value input from the receiving unit 122 with a third threshold value to determine whether they are larger or smaller.

[0044] Furthermore, the determination unit 120 performs the above-mentioned comparison on the data input from the receiving unit 122 , and can also save and accumulate the data and the comparison results in the storage unit 124 .

[0045] When the pressure value of the gas phase part of the liquid collection tank 202 becomes equal to or higher than the liquid collection tank pressure threshold value (in other words, when the receiving unit 122 receives a liquid collection tank vacuum degree drop alarm signal), the determining unit 120 can send an email to the communication terminal 108 to notify that the vacuum degree of the liquid collection tank 202 has dropped. An address to which the email will be sent is preset in the communication unit 126.

[0046] In this way, in the monitoring system 100 of the first embodiment, a collection tank vacuum degree drop alarm can be generated by outputting a collection tank vacuum degree drop alarm signal from the collection tank pressure detection device 106 to the central monitoring device 102. Upon receiving the collection tank vacuum degree drop alarm signal, the central monitoring device 102 can notify a remote manager or the like that the vacuum degree of the collection tank 202 is abnormal by sending an email to the communication terminal 108. In addition, the history of the occurrence and recovery of the collection tank vacuum degree drop alarm can be saved and accumulated in the memory unit 124.

[0047] Furthermore, the central monitoring device 102 can generate monitoring screen data of the vacuum type liquid collecting device that can be viewed by the administrator, etc., at the same time as sending an email notifying the occurrence of the collection tank vacuum degree drop alarm. Specifically, data from the determination unit 120 at the time when the collection tank vacuum degree drop alarm occurred (in other words, the time when the collection tank vacuum degree drop alarm signal was received) is output to the monitoring screen generating unit 128. At this time, the data output from the determination unit 120 to the monitoring screen generating unit 128 includes the date and time when the collection tank vacuum degree drop alarm occurred, the instantaneous pressure value (in other words, the current value) of the gas phase part of the collection tank 202 at that time, and the magnitude relationship with the first threshold value, etc. Furthermore, for all vacuum valve units 50 arranged in the vacuum pipeline connected to the liquid collection tank 202, the data output to the monitoring screen generating unit 128 includes the instantaneous pressure value in the discharge pipe and the instantaneous water level value at that time (which can be converted from the instantaneous pressure value in the water level detection pipe by a function such as that shown in FIG. 4A), the comparison results of the determination unit 120 regarding these instantaneous values ​​(i.e., the magnitude relationship with the corresponding second threshold value or third threshold value), etc. Based on these data input from the determination unit 120, the monitoring screen generating unit 128 generates data for the monitoring screen. The monitoring screen data can be viewed on the communication terminal 108 via the communication unit 126. Furthermore, the monitoring screen data can be saved in the memory unit 124.

[0048] In the first embodiment, a display unit such as a display of the communication terminal 108 displays a monitoring screen. The central monitoring device 102 can function as a display unit. The administrator or the like can access a specific address and display a monitoring screen on the display unit of the communication terminal 108. The monitoring screen may be viewable by the administrator or the like by inputting login information into a login screen. However, if the central monitoring device 102 itself has a visual display unit such as a display device, the monitoring screen may be displayed on the display unit of the central monitoring device 102 itself.

[0049] When the vacuum in the collection tank 202 is restored and the pressure value of the gas phase part of the collection tank 202 falls below the collection tank pressure threshold, the collection tank pressure detection device 106 no longer transmits a collection tank vacuum drop alarm signal. In other words, the collection tank vacuum drop alarm is restored. At this time, the collection tank pressure detection device 106 can transmit a collection tank vacuum recovery signal to the central monitoring device 102. When the receiving unit 122 of the central monitoring device 102 receives the collection tank vacuum recovery signal, the determination unit 120 can transmit an email reporting the recovery of the alarm from the communication unit 126 to the communication terminal 108.

[0050] Similarly to when an alarm is generated, when an alarm is cleared, the central monitoring device 102 can generate data for a monitoring screen that can be viewed by an administrator or the like. Specifically, data from the determination unit 120 at the time when the liquid collection tank vacuum drop alarm is cleared (in other words, the time when the liquid collection tank vacuum recovery signal is received) is output to the monitoring screen generation unit 128. At this time, the data output from the determination unit 120 to the monitoring screen generation unit 128 includes the date and time when the liquid collection tank vacuum drop alarm is cleared, the instantaneous pressure value of the gas phase part of the liquid collection tank 202 at that time, and the magnitude relationship with the first threshold value, etc. In addition, for all vacuum valve units 50 arranged in the vacuum pipeline connected to the liquid collection tank 202, the instantaneous pressure value in the discharge pipe and the instantaneous water level at that time, the comparison results of these instantaneous values ​​by the determination unit 120 (i.e., the magnitude relationship with the corresponding second threshold value or third threshold value), etc. are included in the data output to the monitoring screen generation unit 128. Based on these data input from the judgment unit 120, the monitoring screen generation unit 128 generates data for the monitoring screen. As with the occurrence of an alarm, the data for the monitoring screen when the alarm is cleared can be viewed on the communication terminal 108 via the communication unit 126. As with the occurrence of an alarm, the data for the monitoring screen when the alarm is cleared can be saved in the storage unit 124. A manager or the like who receives a report of the clearing of the alarm can display the monitoring screen on the communication terminal 108 in the same procedure as when the alarm was cleared.

[0051] The monitoring screen according to the first embodiment displays the instantaneous pressure value of the gas phase part of the liquid collection tank 202 at the occurrence time of the liquid collection tank vacuum drop alarm and the recovery time, and also displays a list of the instantaneous pressure values ​​in the discharge pipes of all the vacuum valve units 50 of the vacuum type liquid collection device and the instantaneous water level values. In the following description, such a monitoring screen according to the first embodiment is also referred to as a status display screen.

[0052] Fig. 5 shows an example of a status display screen as a monitoring screen according to the first embodiment. The status display screen 130 shown in Fig. 5 displays the instantaneous pressure value of the gas phase part of the liquid collection tank 202 (displayed as "liquid collection tank vacuum degree" in Fig. 5), the instantaneous pressure value in the discharge pipe of the vacuum valve unit 50 (displayed as "vacuum degree" in Fig. 5), and the instantaneous water level value (displayed as "water level" in Fig. 5) at the time when the liquid collection tank vacuum degree drop alarm occurred. Of "occurrence" and "recovery" which indicate the occurrence status of the liquid collection tank vacuum degree drop alarm, "occurrence" is colored to indicate that an alarm has occurred. The status display screen 130 can also display the date and time of the alarm occurrence.

[0053] 5 shows, as an example, a case where a total of ten vacuum valve units 50 are arranged in a vacuum line divided into two systems (i.e., a first system and a second system). For each system of the vacuum line, the vacuum valve units 50 are numbered, and the instantaneous value of the pressure in the discharge pipe ("vacuum level") and the instantaneous value of the water level ("water level") are displayed in the form of tables 132, 134.

[0054] The status display screen 130 can display the magnitude relationship between the instantaneous pressure value of the gas phase part of the liquid collection tank 202 and the first threshold value. Also, the status display screen 130 can display the comparison result of the determination unit 120 for the instantaneous pressure value in the discharge pipe of the vacuum valve unit 50 and the instantaneous water level value (i.e., the magnitude relationship between the second threshold value and the third threshold value). As an example, in the first embodiment, the first threshold value is -40 kPa, the second threshold value is -25 kPa, and the third threshold value is 400 mm. The instantaneous pressure value of the gas phase part of the liquid collection tank 202 that is equal to or greater than the first threshold value can be marked by coloring, for example, yellow, red, etc. Similarly, the instantaneous pressure value in the discharge pipe that is equal to or greater than the second threshold value can be marked by coloring, for example, yellow, red, etc. Similarly, the instantaneous water level value that is equal to or greater than the third threshold value can be marked by coloring, for example, yellow, red, etc. However, the marking method is not limited to coloring, and various methods such as a symbol such as an arrow or a blinking display can be adopted.

[0055] On the status display screen 130 at the time of alarm recovery (not shown), the alarm occurrence status is shown to be that the alarm has been recovered (for example, "Recovery" out of "Occurrence" and "Recovery" is colored on the status display screen 130 in FIG. 5), and the date and time of the alarm recovery are displayed. The instantaneous pressure value of the gas phase part of the liquid collection tank 202 at the time of alarm recovery is displayed, and the instantaneous pressure value in the discharge pipe of each vacuum valve unit 50 and the instantaneous water level value are displayed in the form of tables 132, 134 for each system of the vacuum line. A manager or the like who receives a report of the alarm recovery can confirm that there is no abnormality in the degree of vacuum of the vacuum type liquid collection apparatus by confirming on the status display screen 130 that there is no marking, for example by coloring.

[0056] In addition to coloring the abnormal values ​​on the status display screen 130, instantaneous values ​​within the normal range may be colored in a color (e.g., green) different from that of the abnormal values. In this case, by confirming that all the instantaneous values ​​are green, it is possible to confirm that there is no abnormality in the degree of vacuum of the vacuum type liquid collection device.

[0057] However, marking by coloring or the like is not necessarily required on the monitoring screen of the first embodiment. In this case, the central monitoring device 102 does not judge whether the measurement value of the pressure sensor is larger than the threshold value, so that the setting of the first to third threshold values ​​in the central monitoring device 102 can be omitted.

[0058] Thus, in the first embodiment, the data for the status display screen 130 is generated to display instantaneous values ​​at the occurrence time of the collection tank vacuum level drop alarm and the recovery time. In other words, data for the status display screen 130 does not need to be generated for instantaneous values ​​received in the period after the occurrence time of the collection tank vacuum level drop alarm has passed and before the recovery time. However, according to other embodiments, the data for the status display screen 130 may be generated at predetermined time intervals.

[0059] 6A and 6B show an example of a processing flow of the monitoring system 100 according to the first embodiment.

[0060] 6A, when the pressure value of the gas phase part of the collection tank 202 becomes equal to or higher than the collection tank pressure threshold, the collection tank pressure detection device 106 generates a collection tank vacuum drop alarm signal (step S1). When the collection tank vacuum drop alarm signal is received by the receiving unit 122 of the central monitoring device 102 (step S2), the determining unit 120 of the central monitoring device 102 generates data for a monitoring screen (status display screen 130 in the first embodiment) (step S3) and transmits an email notifying the occurrence of the collection tank vacuum drop alarm from the communication unit 126 to the communication terminal 108 (step S4). When the communication terminal 108 receives the email (step S5), the manager or the like can view the monitoring screen on the communication terminal 108.

[0061] 6B, when the pressure value of the gas phase part of the collection tank 202 falls below the collection tank pressure threshold, the collection tank pressure detection device 106 generates a collection tank vacuum recovery signal (step S6). When the receiving unit 122 of the central monitoring device 102 receives the collection tank vacuum recovery signal (step S7), the determining unit 120 of the central monitoring device 102 generates data for a monitoring screen (status display screen 130 in the first embodiment) (step S8) and transmits an email reporting the recovery of the collection tank vacuum reduction alarm from the communication unit 126 to the communication terminal 108 (step S9). When the communication terminal 108 receives the email (step S10), the manager or the like can view the monitoring screen on the communication terminal 108.

[0062] According to the first embodiment, when an abnormality occurs in the vacuum degree of the liquid collecting tank 202, the fact of the occurrence of the abnormality can be immediately reported to a remote manager or the like via the communication terminal 108. In addition, the manager or the like who has received the report can immediately access the monitoring screen of the vacuum type liquid collecting device via the communication terminal 108. Since the monitoring screen shows data of all the vacuum valve units 50 connected to the vacuum pipeline network of the vacuum type liquid collecting device, the manager or the like can easily understand where in the entire vacuum pipeline network the abnormality in the vacuum degree has occurred. Furthermore, since the instantaneous value at the time of the alarm occurrence is displayed, it is possible to easily identify the vacuum valve unit 50 which is the source of the abnormality and the range where the influence of the abnormality may extend. Therefore, it is possible to quickly access the location where the abnormality has occurred and prevent the secondary damage from spreading.

[0063] In addition, when the liquid collection tank vacuum drop alarm is reset, the monitoring screen displays the instantaneous value at the time the alarm was reset. Therefore, the manager can confirm that the vacuum level of the vacuum type liquid collection device has been sufficiently restored by looking at the data displayed for each vacuum valve unit 50. This allows for highly reliable monitoring.

[0064] In the first embodiment, the vacuum valve unit pressure detection device 104 is configured to detect the pressure in the discharge pipe and the pressure in the water level detection pipe, and the monitoring screen is generated to display the data on the vacuum degree and water level of the vacuum valve unit 50. This allows a more specific status to be confirmed for each vacuum valve unit 50. However, according to another embodiment, the vacuum valve unit pressure detection device 104 may be configured to detect only the pressure in the discharge pipe. This allows the cost of installing the sensor to be reduced. In this case, the second pressure detection unit 104-2 is omitted, and the third threshold is not set in the central monitoring device 102. Then, only the vacuum degree is displayed on the monitoring screen as data for the vacuum valve unit 50.

[0065] As described above, according to another embodiment, pressure switches may be used instead of pressure sensors as pressure detection units of the vacuum valve unit pressure detection device 104 and the liquid collection tank pressure detection device 106. The pressure switches are configured to perform on / off operations with respect to predetermined thresholds (corresponding to the above-mentioned first threshold, second threshold, and third threshold). Since on / off signals for the corresponding thresholds of each pressure switch are output to the central monitoring device 102, setting of the first threshold, second threshold, and third threshold in the central monitoring device 102 may be omitted. The central monitoring device 102 can perform substantially the same processing flow as described above in response to generation / recovery of a liquid collection tank vacuum degree drop alarm signal (e.g., an on signal) in the liquid collection tank pressure detection device 106. The status display screen 130 at the occurrence and recovery times of the collection tank vacuum level drop alarm displays the presence or absence of an abnormality detection signal from the collection tank pressure detection device 106 (i.e., the on / off state of the pressure switch relative to the first threshold value), and also displays a list showing the presence or absence of an abnormality detection signal from each vacuum valve unit pressure detection device 104 (i.e., the on / off state of the pressure switch relative to the second or third threshold value).In this case, the status display screen 130 can display by marking the state of the pressure switch indicating an abnormality (i.e., either the on or off state). [Second embodiment]

[0066] A second embodiment of the present invention will be described below. In the second embodiment, the detection results of a vacuum valve unit pressure detection device 104 and a liquid collection tank pressure detection device 106 configured substantially similarly to the first embodiment (i.e., the pressure value in the discharge pipe, the pressure value in the water level detection pipe, and the pressure value in the gas phase part of the liquid collection tank measured by the pressure sensor) are wirelessly transmitted to a central monitoring device 102 and processed. In the following description, the second embodiment will be mainly described in terms of configurations different from the first embodiment, and detailed description of configurations similar to those of the first embodiment will be omitted.

[0067] According to the second embodiment, the liquid collection tank pressure detection device 106 can generate a liquid collection tank vacuum drop alarm, and the vacuum valve unit pressure detection device 104 can generate a vacuum valve unit vacuum drop alarm and a vacuum valve unit water level high alarm. The central monitoring device 102 can also send emails to the communication terminal 108 to notify the occurrence and recovery of these alarms. The history of occurrence and recovery of the liquid collection tank vacuum drop alarm, vacuum valve unit vacuum drop alarm, and vacuum valve unit water level high alarm is saved and accumulated in the memory unit 124. When an alarm occurs and when it is recovered, the central monitoring device 102 of the second embodiment can generate data of a status display screen that is substantially similar to the status display screen 130 of the first embodiment. The central monitoring device 102 of the second embodiment can also generate data of a history display screen that displays the history of the alarm occurrence and recovery when an alarm occurs and when it is recovered.

[0068] As in the first embodiment, when the pressure value of the gas phase part of the liquid collection tank 202 becomes equal to or higher than the liquid collection tank pressure threshold (corresponding to the first threshold in the first embodiment), the liquid collection tank pressure detection device 106 generates a liquid collection tank vacuum drop alarm indicating that the vacuum degree of the liquid collection tank 202 has decreased. Furthermore, in the second embodiment, when the pressure value in the discharge pipe becomes equal to or higher than a predetermined threshold (corresponding to the second threshold in the first embodiment), the vacuum valve unit pressure detection device 104 generates a vacuum valve unit vacuum drop alarm indicating that the vacuum degree of the vacuum valve unit 50 has decreased. Furthermore, when the pressure value in the water level detection pipe becomes equal to or higher than a predetermined threshold (corresponding to the third threshold in the first embodiment), the vacuum valve unit pressure detection device 104 generates a vacuum valve unit high water level alarm indicating that the water level of the vacuum valve unit 50 has become abnormally high. Therefore, the vacuum valve unit pressure detection device 104 in the second embodiment can include a comparison unit in the first pressure detection unit 104-1 and the second pressure detection unit 104-2, which compares the measured value of the pressure sensor with the corresponding threshold.

[0069] The collection tank vacuum drop alarm can be generated by outputting a collection tank vacuum drop alarm signal from the wireless transmission unit of the collection tank pressure detection device 106 to the receiving unit 122 of the central monitoring device 102. The vacuum valve unit vacuum drop alarm can be generated by outputting a vacuum valve unit vacuum drop alarm signal from the wireless transmission unit 104-3 of the vacuum valve unit pressure detection device 104 to the receiving unit 122. The vacuum valve unit high water level alarm can be generated by outputting a vacuum valve unit high water level alarm signal from the wireless transmission unit 104-3 of the vacuum valve unit pressure detection device 104 to the receiving unit 122. The collection tank pressure detection device 106 is also configured to output a collection tank vacuum recovery signal to the receiving unit 122 when the collection tank vacuum drop alarm is restored. The vacuum valve unit pressure detection device 104 is configured to output a vacuum valve unit vacuum recovery signal to the receiving unit 122 when the vacuum valve unit vacuum drop alarm is reset (i.e., when the pressure value in the discharge pipe becomes less than the second threshold value), and to output a vacuum valve unit water level recovery signal to the receiving unit 122 when the vacuum valve unit high water level alarm is reset (i.e., when the pressure value in the water level detection pipe becomes less than the third threshold value).

[0070] Also, similar to the first embodiment, the determination unit 120 generates data for a monitoring screen of the vacuum type liquid collection device that can be viewed by an administrator or the like when the above-mentioned alarm occurs and when the device is restored. In the second embodiment, a history display screen and a status display screen are generated as the monitoring screen. The data for the history display screen and the status display screen are generated by a monitoring screen generation unit 128 of the central monitoring device 102. The data for the history display screen and the status display screen are transmitted to the communication terminal 10 via the communication unit 126. 8. Data of the history display screen and data of the status display screen can be stored in the storage unit 124. The history display screen and the status display screen can each be displayed as a single screen.

[0071] 7A and 7B show examples of monitoring screens (specifically, history display screen 140 and status display screen 150) according to the second embodiment. Fig. 7A shows an example of history display screen 140, and Fig. 7B shows an example of status display screen 150. The screen configuration of status display screen 150 in the second embodiment is substantially the same as the screen configuration of status display screen 130 shown in Fig. 5, except that the alarm occurrence status (i.e., whether an alarm has occurred or has been restored) is not displayed, so detailed description will be omitted.

[0072] The history display screen 140 is the screen (in other words, the initial screen) that is displayed first as a monitoring screen when an administrator or the like accesses a specified address. The data of the history display screen 140 is generated based on the most recent data from the history of occurrence and recovery of various alarms (i.e., liquid collection tank vacuum drop alarm, vacuum valve unit vacuum drop alarm, and vacuum valve unit water level high alarm) stored in the memory unit 124. Specifically, as shown in FIG. 7A, the dates and times of alarm occurrence / recovery can be displayed in chronological order, and the alarm items corresponding to each date and time can be displayed alongside the dates and times. The alarm items can include the location of alarm occurrence / recovery (individual numbered vacuum valve units or liquid collection tanks) and the type of alarm (vacuum drop or water level high).

[0073] In addition, the history display screen 140 can display a call button 142 for calling the status display screen 150 from the history display screen 140. The call button 142 may be displayed for each alarm item. The administrator, etc., can display the status display screen 150 by touching the call button 142 of the alarm item to be confirmed. This allows the occurrence or recovery status of an alarm for each alarm item to be confirmed on the status display screen 150. As an example, the history display screen 140 shown in FIG. 7A is a history display screen based on data generated when the high water level alarm of the vacuum valve unit 1-1 is restored. From this history display screen 140, in order to confirm the data at the time when the high water level alarm occurred for the vacuum valve unit 1-1 (2023 / 4 / 27 13:18:00), the status display screen 150 shown in FIG. 7B can be called and displayed by touching the corresponding call button 142. It can be seen that the time when the high water level warning occurred for vacuum valve unit 1-1 (4 / 27 / 2023 13:18:00) displayed on the history display screen 140 of Figure 7A is displayed as the date and time of data collection on the status display screen 150 of Figure 7B. In addition, on the status display screen 150, as in the first embodiment, the instantaneous pressure value of the gas phase part of the liquid collection tank 202 that is equal to or greater than the first threshold value, the instantaneous pressure value in the discharge pipe that is equal to or greater than the second threshold value, and the instantaneous water level value that is equal to or greater than the third threshold value can be marked by coloring or the like. In this case, in the central monitoring device 102, the magnitude relationship between the measurement value of the pressure sensor and the first to third threshold values ​​may be determined based on whether or not the receiving unit 122 has received a liquid collection tank vacuum degree drop warning signal, whether or not the vacuum valve unit vacuum degree drop warning signal has been received, and whether or not the vacuum valve unit high water level warning signal has been received. Therefore, setting of the first to third threshold values ​​in the central monitoring device 102 may be omitted.

[0074] In this way, in the monitoring system of the second embodiment, in addition to the liquid collection tank vacuum drop alarm, a vacuum valve unit vacuum drop alarm and a vacuum valve unit water level high alarm can be issued. That is, an alarm can be issued for the vacuum valve unit itself, so that the location of the abnormality can be easily identified and the malfunction of the vacuum type liquid collection device can be dealt with more quickly. In addition, the history display screen 140 can visualize the history of the occurrence and recovery of multiple alarms, so that the tendency of malfunctions of the vacuum type liquid collection device can be grasped and appropriate preventive measures can be taken. In addition, the status display screen 150 can be viewed as necessary, so that the tendency of malfunctions can be analyzed in detail.

[0075] In the second embodiment, the generation of data for the monitoring screen when the liquid collecting tank vacuum drop alarm, the vacuum valve unit vacuum drop alarm, and the vacuum valve unit high water level alarm are generated and restored can be performed by the same process flow as that shown in Fig. 6A and Fig. 6B. For example, the generation of data for the monitoring screen when the vacuum valve unit vacuum drop alarm is generated can be performed according to a process flow substantially similar to that shown in Fig. 6A, triggered by the generation of a vacuum valve unit vacuum drop alarm signal from the vacuum valve unit pressure detection device 104. The generation of data for the monitoring screen when the vacuum valve unit vacuum drop alarm is restored can be performed according to a process flow substantially similar to that shown in Fig. 6B, triggered by the generation of a vacuum valve unit vacuum restoration signal from the vacuum valve unit pressure detection device 104. Similarly, the generation of data for the monitoring screen when the vacuum valve unit high water level alarm is generated can be performed according to a process flow substantially similar to that shown in Fig. 6A, triggered by the generation of a high water level alarm signal from the vacuum valve unit pressure detection device 104. In addition, the generation of data for the monitoring screen when the vacuum valve unit high water level alarm is restored can be carried out according to a processing flow substantially similar to that of Figure 6B, triggered by the generation of a vacuum valve unit water level restoration signal from the vacuum valve unit pressure detection device 104.

[0076] As in the first embodiment, in the second embodiment, a pressure switch may be provided instead of the pressure sensor that measures the instantaneous value. In that case, the on / off state of the pressure switch can be displayed on the status display screen 150.

[0077] Although the embodiment of the present invention has been described above, the embodiment of the present invention is intended to facilitate understanding of the present invention and does not limit the present invention. The present invention may be modified or improved without departing from the spirit thereof, and the present invention naturally includes equivalents thereof. Furthermore, any combination or omission of each component described in the claims and specification is possible within the scope of solving at least a part of the above-mentioned problems or achieving at least a part of the effects.

[0078] The present invention includes the following aspects. 1. A monitoring system for a vacuum type liquid collection device that collects liquid stored in a plurality of vacuum valve units into a liquid collection tank under negative pressure, comprising: A central monitoring device; a liquid collection tank pressure detection device capable of detecting the pressure of a gas phase portion of the liquid collection tank and wirelessly transmitting the detection result of the pressure of the gas phase portion of the liquid collection tank to a central monitoring device; a vacuum valve unit pressure detection device provided corresponding to each of the plurality of vacuum valve units, the vacuum valve unit including a pressure detection unit for detecting at least the pressure inside the discharge pipe of the vacuum valve unit and a wireless transmission unit capable of wirelessly transmitting the detection result of the pressure detection unit to a central monitoring device; Equipped with A first threshold is set for the pressure of the gas phase of the liquid collection tank, the liquid collection tank pressure detection device is configured to generate a liquid collection tank vacuum reduction alarm to the central monitoring device when the pressure of the gas phase part of the liquid collection tank is equal to or higher than a first threshold value; A monitoring system in which the central monitoring device is configured to generate data for the monitoring screen of the vacuum liquid collection device at the time when a vacuum level drop alarm in the collection tank occurs and at the time when the alarm is cleared, and the monitoring screen displays a list of the pressures in the discharge pipes of multiple vacuum valve units and the pressure in the gas phase of the collection tank at the time when the vacuum level drop alarm in the collection tank occurs or at the time when the alarm is cleared. 2. The monitoring system according to claim 1, The vacuum valve unit pressure detection device is Equipped with an independent power source to power the pressure detection unit and wireless transmission unit. A monitoring system in which a pressure detection unit, a wireless transmission unit, and an independent power supply are housed in a single waterproof case. 3. The monitoring system according to 2. above, The autonomous power source may be a battery device or an energy harvesting device for the monitoring system. 4. The monitoring system according to any one of 1. to 3. above, The central monitoring device is a cloud computer, A monitoring system in which the vacuum valve unit pressure detection device and the liquid collection tank pressure detection device are connected to a central monitoring device via a gateway device so as to be capable of wireless transmission. 5. The monitoring system according to any one of 1. to 4. above, The monitoring system includes a communication terminal capable of communicating with a central monitoring device, A monitoring system, wherein the central monitoring device is configured to display a monitoring screen on the communication terminal. 6. The monitoring system according to any one of 1. to 5. above, The vacuum line that collects the liquid in the collection tank is divided into multiple systems, The list is displayed by system, monitoring system. 7. The monitoring system according to any one of 1. to 6. above, A monitoring system, wherein the central monitoring device is configured to generate, at predetermined time intervals, data for a monitoring screen that displays a list of pressures in the discharge pipes of a plurality of vacuum valve units and the pressure in the gas phase of the liquid collection tank. 8. The monitoring system according to any one of 1. to 7. above, The pressure detection unit includes a pressure sensor that detects the pressure inside the discharge pipe, A monitoring system that displays the instantaneous pressure value inside the discharge pipe in a table. 9. The monitoring system according to claim 8, A second threshold value is set for the instantaneous value of the pressure in the discharge pipe, A monitoring system in which an instantaneous pressure value in the discharge pipe that is equal to or greater than a second threshold value is marked and displayed. 10. The monitoring system according to any one of 1. to 7. above, A second threshold value is set for the instantaneous value of the pressure in the discharge pipe, the pressure detection unit includes a pressure switch that is turned on and off in response to a second threshold value; A monitoring system that displays the on / off status of pressure switches in a table. 11. The monitoring system according to claim 10, A monitoring system in which either the on or off state of a pressure switch is marked and displayed. 12. The monitoring system according to any one of 1. to 7. above, the pressure detection unit includes a first pressure detection unit that detects a pressure in a discharge pipe of the vacuum valve unit, and a second pressure detection unit that detects a pressure in a water level detection pipe of the vacuum valve unit; the central monitoring device has a processing unit that converts the detection result of the second pressure detection unit into a water level; The monitoring screen displays a list of the pressures in the discharge pipes of multiple vacuum valve units and the water levels of multiple vacuum valve units at the time when a vacuum drop alarm in the collection tank occurs or is restored, as well as the pressure in the gas phase of the collection tank, in a monitoring system. 13. The monitoring system according to claim 12, Each of the first pressure detection unit and the second pressure detection unit includes a pressure sensor; A monitoring system that displays the instantaneous pressure value in the discharge pipe and the instantaneous water level value in a table. 14. The monitoring system according to claim 13, A second threshold value is set for the instantaneous value of the pressure in the discharge pipe, and a third threshold value is set for the instantaneous value of the pressure or the water level in the water level detector pipe, A monitoring system in which an instantaneous value of the pressure in the discharge pipe that is equal to or greater than the second threshold value and an instantaneous value of the water level that is equal to or greater than the third threshold value are marked and displayed. 15. The monitoring system according to claim 12, A second threshold value is set for the instantaneous value of the pressure in the discharge pipe, and a third threshold value is set for the instantaneous value of the pressure or the water level in the water level detector pipe, The first pressure detection unit includes a first pressure switch that is turned on and off with respect to a second threshold value, and the second pressure detection unit includes a second pressure switch that is turned on and off with respect to a third threshold value. , A monitoring system, wherein the table displays the on / off state of the first pressure switch and the on / off state of the second pressure switch. 16. The monitoring system according to claim 15, A monitoring system in which either an on state or an off state is marked and displayed for each of the first pressure switch and the second pressure switch. 17. The monitoring system according to any one of the above 12. to 16., A second threshold value is set for the instantaneous value of the pressure in the discharge pipe, and a third threshold value is set for the instantaneous value of the pressure or the water level in the water level detector pipe, the vacuum valve unit pressure detection device is configured to generate a vacuum valve unit low vacuum alarm to the central monitoring device when the pressure in the discharge pipe of any of the plurality of vacuum valve units is equal to or higher than a second threshold value, and to generate a vacuum valve unit high water level alarm to the central monitoring device when the pressure in the water level detection pipe of any of the plurality of vacuum valve units is equal to or higher than a third threshold value; A monitoring system in which the central monitoring device is configured to generate data for the monitoring screen of a vacuum liquid collection device at the time when a collection tank vacuum level drop alarm, a vacuum valve unit vacuum level drop alarm, or a vacuum valve unit high water level alarm occurs and is restored, and the monitoring screen displays a list of the pressures in the discharge pipes of a plurality of vacuum valve units and the water levels of a plurality of vacuum valve units, as well as the pressure in the gas phase of the collection tank, at the time when the collection tank vacuum level drop alarm, the vacuum valve unit vacuum level drop alarm, or the vacuum valve unit high water level alarm occurs or is restored. 18. The monitoring system according to claim 17, The central monitoring device has a storage unit for storing a history of occurrence and recovery of a liquid collection tank vacuum drop alarm, a vacuum valve unit vacuum drop alarm, and a vacuum valve unit water level high alarm, and data on a monitoring screen. The monitoring screen data includes history display screen data and status display screen data, the history display screen displays the history of occurrence and recovery of the collection tank vacuum drop alarm, the vacuum valve unit vacuum drop alarm, and the vacuum valve unit high water level alarm, and the status display screen displays a list of the pressures and water levels in the discharge pipes of the multiple vacuum valve units and the pressure in the gas phase of the collection tank at the occurrence or recovery time of the collection tank vacuum drop alarm, the vacuum valve unit vacuum drop alarm, or the vacuum valve unit high water level alarm, A monitoring system in which the history display screen further displays a call button for selectively displaying a status display screen corresponding to the occurrence or recovery time of a collection tank vacuum drop alarm, a vacuum valve unit vacuum drop alarm, or a vacuum valve unit water level high alarm. 19. The monitoring system according to any one of 17. to 18. above, A monitoring system in which pressure in the gas phase of the liquid collection tank that is equal to or greater than a first threshold is marked and displayed. 20. A method for monitoring a vacuum liquid collection device that collects liquid stored in a plurality of vacuum valve units into a liquid collection tank under negative pressure, comprising: a step in which the liquid collecting tank pressure detection device and the vacuum valve unit pressure detection device detect the pressure in the gas phase part of the liquid collecting tank and the pressure in the discharge pipe of the vacuum valve unit, respectively, and output the detection results to a central monitoring device; When the pressure of the gas phase part of the liquid collection tank is equal to or higher than a first threshold value which is a liquid collection tank pressure threshold value, the liquid collection tank pressure detection device issues a liquid collection tank vacuum reduction alarm to the central monitoring device; When a liquid collection tank vacuum level drop alarm occurs, the central monitoring device generates data for a first monitoring screen of the vacuum liquid collection device and simultaneously transmits an email to the communication terminal; a step of the central monitoring device displaying a first monitoring screen on the communication terminal; When the liquid collection tank vacuum level drop alarm is reset, the central monitoring device generates data for a second monitoring screen of the vacuum liquid collection device and simultaneously transmits an email to the communication terminal; a step of the central monitoring device displaying a second monitoring screen on the communication terminal; Equipped with A method in which a first monitoring screen displays a list of pressures in the discharge pipes of multiple vacuum valve units and the pressure in the gas phase of the collection tank at the time when a vacuum level drop alarm for the collection tank occurs, and a second monitoring screen displays a list of pressures in the discharge pipes of multiple vacuum valve units and the pressure in the gas phase of the collection tank at the time when the vacuum level drop alarm for the collection tank is restored. 21. The method according to claim 20, The vacuum line that collects the liquid in the collection tank is divided into multiple systems, The listing is presented by lineage,method. 22. The method according to any one of the above 20 to 21, further comprising: A method comprising the step of generating, at predetermined time intervals, data for a monitor screen displaying a list of pressures in the discharge lines of a plurality of vacuum valve units and the pressure in the gas phase of the liquid collection tank by a central monitor. 23. The method according to any one of the above 20 to 22, The instantaneous pressure value in the discharge pipe measured by the pressure sensor is displayed in the table. 24. The method according to claim 23, A second threshold value is set for the instantaneous value of the pressure in the discharge pipe, A method in which an instantaneous pressure value in the discharge pipe that is equal to or greater than the second threshold value is marked and displayed. 25. The method according to any one of the above 20 to 22, A second threshold value is set for the instantaneous value of the pressure in the discharge pipe, The table indicates the on / off status of the pressure switch relative to the second threshold. 26. The method according to claim 25, A method in which either the on or off state of the pressure switch is marked to indicate that state. 27. The method according to any one of the above 20 to 22, a step of a vacuum valve unit pressure detection device detecting a pressure in a water level detection pipe of the vacuum valve unit and outputting a detection result to a central monitoring device; The central monitoring device converts the pressures in the water level detector tubes of the plurality of vacuum valve units into water levels; A method in which the first monitoring screen and the second monitoring screen respectively display a list of the pressures in the discharge pipes of the multiple vacuum valve units and the water levels of the multiple vacuum valve units, and the pressure in the gas phase of the collection tank at the time when a vacuum level drop alarm in the collection tank occurs and the time when it is restored. 28. The method according to claim 27, The instantaneous pressure value in the discharge pipe and the instantaneous water level value measured by the pressure sensor are displayed in the table. 29. The method according to claim 28, A second threshold value is set for the instantaneous value of the pressure in the discharge pipe, and a third threshold value is set for the instantaneous value of the pressure or the water level in the water level detector pipe, The method includes marking and displaying instantaneous values ​​of pressure in the discharge pipe that are equal to or greater than the second threshold value and instantaneous values ​​of water level that are equal to or greater than the third threshold value. 30. The method according to claim 27, A second threshold value is set for the instantaneous value of the pressure in the discharge pipe, and a third threshold value is set for the instantaneous value of the pressure or the water level in the water level detector pipe, The table indicates an on / off state of the pressure switch relative to the second threshold or the third threshold. 31. The method according to claim 30, A method in which either the on or off state of the pressure switch is marked to indicate that state. 32. The method according to any one of the above 27 to 31, The vacuum valve unit pressure detection device issues a vacuum valve unit vacuum level drop alarm to the central monitoring device when the pressure in the discharge pipe of any of the plurality of vacuum valve units is equal to or higher than a second threshold value, and issues a central monitoring device a vacuum level drop alarm when the pressure in the water level detection pipe of any of the plurality of vacuum valve units is equal to or higher than a third threshold value. issuing a vacuum valve unit water level high alarm to a central monitoring device; a step in which, when a liquid collecting tank vacuum level drop alarm, a vacuum valve unit vacuum level drop alarm, or a vacuum valve unit water level high alarm occurs, the central monitoring device generates data for a first monitoring screen and simultaneously sends an email to the communication terminal; a step in which the central monitoring device generates data for a second monitoring screen and simultaneously transmits an e-mail to the communication terminal when the liquid collecting tank vacuum level drop alarm, the vacuum valve unit vacuum level drop alarm, or the vacuum valve unit water level high alarm is restored; Including, a first monitoring screen displays a list of the pressures in the discharge pipes of a plurality of vacuum valve units and the water levels of the plurality of vacuum valve units, and the pressure in the gas phase of the collection tank, at the time when the collection tank vacuum drop alarm, the vacuum valve unit vacuum drop alarm, or the vacuum valve unit high water level alarm occurs, and a second monitoring screen displays a list of the pressures in the discharge pipes of the plurality of vacuum valve units and the water levels of the plurality of vacuum valve units, and the pressure in the gas phase of the collection tank, at the time when the collection tank vacuum drop alarm, the vacuum valve unit vacuum drop alarm, or the vacuum valve unit high water level alarm is restored. 33. The method according to claim 32, a step of storing a history of occurrence and recovery of a liquid collecting tank vacuum level drop alarm, a vacuum valve unit vacuum level drop alarm, and a vacuum valve unit water level high alarm, and data of a first monitoring screen and a second monitoring screen in a central monitoring device; Each of the first monitoring screen data and the second monitoring screen data includes status display screen data and history display screen data, the status display screen displays a list of the pressures and water levels in the discharge pipes of the multiple vacuum valve units and the pressure in the gas phase part of the liquid collection tank at the occurrence or recovery time of a liquid collection tank vacuum drop alarm, a vacuum valve unit vacuum drop alarm, or a vacuum valve unit high water level alarm, the history display screen displays the history of occurrence and recovery of the liquid collection tank vacuum drop alarm, the vacuum valve unit vacuum drop alarm, and the vacuum valve unit high water level alarm, and the history display screen further displays a call button for selectively displaying a status display screen corresponding to the occurrence or recovery time of the liquid collection tank vacuum drop alarm, the vacuum valve unit vacuum drop alarm, or the vacuum valve unit high water level alarm, The method, wherein the steps of displaying a first monitoring screen and displaying a second monitoring screen include displaying a history display screen as an initial screen. 34. The method according to any one of the above 32 to 33, A method in which a pressure in the gas phase part of the liquid collection tank that is equal to or greater than a first threshold value is marked and displayed on a first monitoring screen and a second monitoring screen. [Industrial Applicability]

[0079] Embodiments of the present invention may be used generally in vacuum liquid collection devices, such as vacuum sewer systems. [Explanation of symbols]

[0080] 1 home 2 Gravity pipe 3 Vacuum valve unit 4 Vacuum line 5. Water collection tank 6. Vacuum Pump 7 Vacuum Station 8. Pressure Pump 12 Power control panel 13 Vacuum station abnormality notification device 31 Sewage Inlet 32 Discharge pipe 40 Vacuum valve 41 Valve body 50 Vacuum valve unit 52, 54 Pressure conduit 55 Sewage Inlet 56 Discharge pipe 58 Water level detector 60 Vacuum valve 62 Vacuum gate valve 64 Valve body 66 Spring 68 Vacuum Controller 70 rooms 100 Surveillance System 102 Central monitoring device 104 Vacuum valve unit pressure detection device 104-1 First pressure detection unit 104-2 Second pressure detector 104-3 Radio transmitter 104-4 Independent power supply 106 Collection tank pressure detection device 108 Communication terminals 110 Waterproof Case 111 Opening 112 Manhole cover 120 Judgment section 122 Receiving section 124 Storage section 126 Communications Department 128 Monitoring screen generation section 130, 150 Status display screen 132, 134 List 140 History display screen 142 Call button 200 Vacuum Station 202 Collection tank

Claims

1. A monitoring system for a vacuum type liquid collection device that collects liquid stored in a plurality of vacuum valve units into a liquid collection tank under negative pressure, comprising: A central monitoring device; a liquid collection tank pressure detection device capable of detecting a pressure in a gas phase portion of the liquid collection tank and wirelessly transmitting a detection result of the pressure in the gas phase portion of the liquid collection tank to the central monitoring device; a vacuum valve unit pressure detection device provided corresponding to each of the plurality of vacuum valve units, the vacuum valve unit including a pressure detection unit for detecting at least a pressure inside a discharge pipe of the vacuum valve unit and a wireless transmission unit capable of wirelessly transmitting a detection result of the pressure detection unit to the central monitoring device; Equipped with A first threshold value is set for the pressure of the gas phase portion of the liquid collection tank, the liquid collection tank pressure detection device is configured to generate a liquid collection tank vacuum reduction alarm to the central monitoring device when the pressure of the gas phase part of the liquid collection tank is equal to or higher than the first threshold value; The central monitoring device is configured to generate data for the monitoring screen of the vacuum liquid collection device at the time when the collection tank vacuum level drop alarm occurs and at the time when the collection tank vacuum level drop alarm is restored, and the monitoring screen displays a list of the pressures in the discharge pipes of the multiple vacuum valve units and the pressure in the gas phase of the collection tank at the time when the collection tank vacuum level drop alarm occurs or at the time when the collection tank vacuum level drop alarm is restored.

2. 2. The monitoring system of claim 1, The vacuum valve unit pressure detection device is The pressure sensor includes an independent power source that supplies power to the pressure sensor and the wireless transmitter. A monitoring system, wherein the pressure detection unit, the wireless transmitting unit and the independent power supply are housed in a single waterproof case.

3. 3. The monitoring system according to claim 2, A monitoring system, wherein the independent power source is a battery device or an energy harvesting device.

4. A monitoring system according to any one of claims 1 to 3, The central monitoring device is a cloud computer; A monitoring system, wherein the vacuum valve unit pressure detection device and the liquid collection tank pressure detection device are connected to the central monitoring device via a gateway device so as to be capable of wireless transmission.

5. A monitoring system according to any one of claims 1 to 3, the monitoring system includes a communication terminal capable of communicating with the central monitoring device; A monitoring system, wherein the central monitoring device is configured to display the monitoring screen on the communication terminal.

6. A monitoring system according to any one of claims 1 to 3, a vacuum line for collecting the liquid in the liquid collecting tank is divided into a plurality of systems; A monitoring system, wherein the list is displayed for each of the systems.

7. A monitoring system according to any one of claims 1 to 3, A monitoring system wherein the central monitoring device is configured to generate a list of pressures in the discharge pipes of the plurality of vacuum valve units and data for a monitoring screen displaying the pressure in the gas phase portion of the liquid collection tank at a predetermined time interval.

8. A monitoring system according to any one of claims 1 to 3, The pressure detection unit includes a pressure sensor that detects the pressure inside the discharge pipe, A monitoring system in which the instantaneous value of the pressure in the discharge pipe is displayed in the table.

9. 9. The monitoring system of claim 8, A second threshold value is set for the instantaneous value of the discharge pipe pressure, A monitoring system in which an instantaneous value of the pressure in the discharge pipe that is equal to or greater than the second threshold value is marked and displayed.

10. A monitoring system according to any one of claims 1 to 3, A second threshold value is set for the instantaneous value of the discharge pipe pressure, The pressure detection unit includes a pressure switch that is turned on and off in response to the second threshold value, A monitoring system, wherein the table displays the on / off status of the pressure switch.

11. 11. The monitoring system of claim 10, A monitoring system in which either the on state or the off state of the pressure switch is marked and displayed.

12. A monitoring system according to any one of claims 1 to 3, the pressure detection unit includes a first pressure detection unit that detects a pressure in a discharge pipe of the vacuum valve unit, and a second pressure detection unit that detects a pressure in a water level detection pipe of the vacuum valve unit, the central monitoring device has a processing unit that converts a detection result of the second pressure detection unit into a water level; The monitoring screen displays a list of the pressures in the discharge pipes of the multiple vacuum valve units and the water levels of the multiple vacuum valve units at the time the vacuum level drop alarm for the liquid collection tank occurs or is restored, and the pressure in the gas phase of the liquid collection tank.

13. 13. The monitoring system of claim 12, each of the first pressure detection unit and the second pressure detection unit includes a pressure sensor; A monitoring system in which the table displays instantaneous values ​​of the pressure in the discharge pipe and the water level.

14. 14. The monitoring system of claim 13, a second threshold value is set for the instantaneous value of the discharge pipe pressure, and a third threshold value is set for the instantaneous value of the water level detector pipe pressure or water level, A monitoring system in which an instantaneous value of the pressure in the discharge pipe that is equal to or greater than the second threshold value and an instantaneous value of the water level that is equal to or greater than the third threshold value are marked and displayed.

15. 13. The monitoring system of claim 12, a second threshold value is set for the instantaneous value of the discharge pipe pressure, and a third threshold value is set for the instantaneous value of the water level detector pipe pressure or water level, the first pressure detection unit includes a first pressure switch that is turned on and off with respect to the second threshold value, and the second pressure detection unit includes a second pressure switch that is turned on and off with respect to the third threshold value, A monitoring system, wherein the table displays an on / off state of the first pressure switch and an on / off state of the second pressure switch.

16. 16. The monitoring system of claim 15, A monitoring system in which either an on state or an off state is marked and displayed for each of the first pressure switch and the second pressure switch.

17. 13. The monitoring system of claim 12, a second threshold value is set for the instantaneous value of the discharge pipe pressure, and a third threshold value is set for the instantaneous value of the water level detector pipe pressure or water level, the vacuum valve unit pressure detection device is configured to generate a vacuum valve unit low vacuum alarm to the central monitoring device when the pressure in the discharge pipe of any of the plurality of vacuum valve units is equal to or higher than the second threshold value, and to generate a vacuum valve unit high water level alarm to the central monitoring device when the pressure in the water level detection pipe of any of the plurality of vacuum valve units is equal to or higher than the third threshold value, The central monitoring device is configured to generate data for the monitoring screen of the vacuum liquid collection device at the time when the collection tank vacuum level drop alarm, the vacuum valve unit vacuum level drop alarm, or the vacuum valve unit high water level alarm occurs and at the time when it is restored, and the monitoring screen displays a list of the pressures in the discharge pipes of the multiple vacuum valve units and the water levels of the multiple vacuum valve units, as well as the pressure in the gas phase of the collection tank, at the time when the collection tank vacuum level drop alarm, the vacuum valve unit vacuum level drop alarm, or the vacuum valve unit high water level alarm occurs or at the time when it is restored.

18. 18. The monitoring system of claim 17, the central monitoring device has a storage unit for storing a history of occurrence and recovery of the liquid collecting tank vacuum degree drop alarm, the vacuum valve unit vacuum degree drop alarm, and the vacuum valve unit water level high alarm, and data on the monitoring screen; the monitoring screen data includes history display screen data and status display screen data, the history display screen displays the history of occurrence and recovery of the liquid collection tank vacuum drop alarm, the vacuum valve unit vacuum drop alarm, and the vacuum valve unit high water level alarm, and the status display screen displays a list of the pressures in the discharge pipes and the water levels of the plurality of vacuum valve units and the pressure of the gas phase part of the liquid collection tank at the occurrence or recovery time of the liquid collection tank vacuum drop alarm, the vacuum valve unit vacuum drop alarm, or the vacuum valve unit high water level alarm, A monitoring system in which the history display screen further displays a call button for selectively displaying the status display screen corresponding to the occurrence or recovery time of the collection tank vacuum level drop alarm, the vacuum valve unit vacuum level drop alarm, or the vacuum valve unit water level high alarm.

19. 18. The monitoring system of claim 17, A monitoring system in which a pressure in the gas phase portion of the liquid collection tank that is equal to or greater than the first threshold is marked and displayed.

20. 1. A method for monitoring a vacuum type liquid collection device that collects liquid stored in a plurality of vacuum valve units into a liquid collection tank under negative pressure, comprising: a liquid collecting tank pressure detection device and a vacuum valve unit pressure detection device respectively detecting the pressure in the gas phase part of the liquid collecting tank and the pressure in the discharge pipe of the vacuum valve unit, and outputting the detection results to a central monitoring device; When the pressure of the gas phase of the liquid collection tank is equal to or higher than a first threshold value which is a liquid collection tank pressure threshold value, the liquid collection tank pressure detection device issues a liquid collection tank vacuum degree reduction alarm to the central monitoring device; When the liquid collecting tank vacuum level drop alarm is generated, the central monitoring device generates data for a first monitoring screen of the vacuum type liquid collecting device and simultaneously transmits an email to a communication terminal; a step of the central monitoring device displaying the first monitoring screen on the communication terminal; When the liquid collecting tank vacuum level drop alarm is restored, the central monitoring device generates data for a second monitoring screen of the vacuum liquid collecting device and simultaneously transmits an email to the communication terminal; a step of the central monitoring device displaying the second monitoring screen on the communication terminal; Equipped with The method, wherein the first monitoring screen displays a list of pressures in the discharge pipes of the multiple vacuum valve units and the pressure in the gas phase of the collection tank at the time the collection tank vacuum level drop alarm occurs, and the second monitoring screen displays a list of pressures in the discharge pipes of the multiple vacuum valve units and the pressure in the gas phase of the collection tank at the time the collection tank vacuum level drop alarm is restored.

21. 21. The method of claim 20, a vacuum line for collecting the liquid in the liquid collecting tank is divided into a plurality of systems; The list is displayed by the lineage.

22. 22. The method of claim 20 or 21, further comprising: The method includes a step of generating, at a predetermined time interval, data for a monitoring screen displaying a list of pressures in the discharge pipes of the plurality of vacuum valve units and the pressure in the gas phase of the liquid collection tank by the central monitoring device.

23. 22. The method of claim 20 or 21, The method, wherein the table displays an instantaneous pressure value in the discharge pipe measured by a pressure sensor.

24. 24. The method of claim 23, A second threshold value is set for the instantaneous value of the discharge pipe pressure, The instantaneous discharge pipe pressure value that is equal to or greater than the second threshold value is marked and displayed.

25. 22. The method of claim 20 or 21, A second threshold value is set for the instantaneous value of the discharge pipe pressure, The table indicates an on / off state of the pressure switch relative to the second threshold.

26. 26. The method of claim 25, The method, wherein either an on or off state of the pressure switch is marked to indicate that state.

27. 22. The method of claim 20 or 21, a step of the vacuum valve unit pressure detection device detecting a pressure in a water level detector pipe of the vacuum valve unit and outputting a detection result to the central monitoring device; and a step of the central monitoring device converting the pressures in the water level detector pipes of the plurality of vacuum valve units into water levels, The method, wherein the first monitoring screen and the second monitoring screen respectively display a list of the pressures in the discharge pipes of the plurality of vacuum valve units and the water levels of the plurality of vacuum valve units at the time when the vacuum level drop alarm in the collection tank occurs and the time when the alarm is restored, and the pressure in the gas phase of the collection tank.

28. 28. The method of claim 27, The method, wherein the table displays instantaneous values ​​of the discharge pipe pressure and the water level measured by the pressure sensor.

29. 29. The method of claim 28, a second threshold value is set for the instantaneous value of the discharge pipe pressure, and a third threshold value is set for the instantaneous value of the water level detector pipe pressure or water level, An instantaneous value of the pressure in the discharge pipe that is equal to or greater than the second threshold value and an instantaneous value of the water level that is equal to or greater than the third threshold value The way in which time values ​​are marked and displayed.

30. 28. The method of claim 27, a second threshold value is set for the instantaneous value of the discharge pipe pressure, and a third threshold value is set for the instantaneous value of the water level detector pipe pressure or water level, The method, wherein the table indicates an on / off state of a pressure switch relative to the second threshold or the third threshold.

31. 31. The method of claim 30, The method, wherein either an on or off state of the pressure switch is marked to indicate that state.

32. 28. The method of claim 27, the vacuum valve unit pressure detection device generating a vacuum valve unit low vacuum alarm to the central monitoring device when the pressure in the discharge pipe of any of the plurality of vacuum valve units is equal to or higher than a second threshold value, and generating a vacuum valve unit high water level alarm to the central monitoring device when the pressure in the water level detection pipe of any of the plurality of vacuum valve units is equal to or higher than a third threshold value; a step of the central monitoring device generating data for the first monitoring screen and simultaneously sending an e-mail to the communication terminal when the liquid collecting tank vacuum level drop alarm, the vacuum valve unit vacuum level drop alarm, or the vacuum valve unit water level high alarm occurs; when the liquid collecting tank vacuum level drop alarm, the vacuum valve unit vacuum level drop alarm, or the vacuum valve unit water level high alarm is restored, the central monitoring device generates data for the second monitoring screen and simultaneously sends an email to the communication terminal; Including, The method, wherein the first monitoring screen displays a list of the pressures in the discharge pipes of the multiple vacuum valve units and the water levels of the multiple vacuum valve units at the time when the collection tank vacuum level drop alarm, the vacuum valve unit vacuum level drop alarm, or the vacuum valve unit high water level alarm occurs, and the pressure in the gas phase of the collection tank, and the second monitoring screen displays a list of the pressures in the discharge pipes of the multiple vacuum valve units and the water levels of the multiple vacuum valve units at the time when the collection tank vacuum level drop alarm, the vacuum valve unit vacuum level drop alarm, or the vacuum valve unit high water level alarm is restored.

33. 33. The method of claim 32, a step of storing a history of occurrence and recovery of the liquid collecting tank vacuum degree drop alarm, the vacuum valve unit vacuum degree drop alarm, and the vacuum valve unit water level high alarm, and data of the first monitoring screen and the second monitoring screen in the central monitoring device; each of the first monitoring screen data and the second monitoring screen data includes status display screen data and history display screen data, the status display screen displays a list of pressures and water levels in the discharge pipes of the plurality of vacuum valve units and the pressure of the gas phase part of the liquid collection tank at the occurrence or recovery time of the liquid collection tank vacuum drop alarm, the vacuum valve unit vacuum drop alarm, or the vacuum valve unit high water level alarm, the history display screen displays the history of occurrence and recovery of the liquid collection tank vacuum drop alarm, the vacuum valve unit vacuum drop alarm, and the vacuum valve unit high water level alarm, and the history display screen further displays a call button for selectively displaying the status display screen corresponding to the occurrence or recovery time of the liquid collection tank vacuum drop alarm, the vacuum valve unit vacuum drop alarm, or the vacuum valve unit high water level alarm, A method, wherein the steps of displaying the first monitoring screen and displaying the second monitoring screen include displaying the history display screen as an initial screen.

34. 33. The method of claim 32, A method according to claim 1, wherein a pressure in the gas phase portion of the liquid collection tank that is equal to or greater than the first threshold is marked and displayed on the first monitoring screen and the second monitoring screen.

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