JP3418493B2 - Alarm system for sewer system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm device for a sewer system. 2. Description of the Related Art A vacuum type sewer system is provided with a vacuum valve between a sewage tank equipped with a vacuum valve and a vacuum sewer pipe, and when the water level of the sewage tank rises, the vacuum valve is opened to evacuate the sewage tank. It is configured to conduct sewage by discharging the sewage by the pressure difference between the atmospheric pressure acting on the water surface of the sewage pipe and the vacuum pressure of the vacuum sewage pipe, and to close the vacuum valve when the water level of the sewage tank decreases. . As an alarm device for detecting and displaying an abnormality in a vacuum type sewer system, Japanese Patent Laid-Open Publication No.
There is one described in Japanese Patent Publication No. This prior art is based on the fact that when the vacuum valve is abnormal, the vacuum valve is continuously closed or opened for a long period of time, and the open state duration and the closed state duration of the vacuum valve are determined. When the duration of the open state or the duration of the closed state exceeds the set time, it is determined that an abnormality has occurred in the vacuum valve, and a warning is issued to residents. However, in the prior art, when an abnormality occurs in a vacuum valve of a sewage tank equipped with a vacuum valve, an alarm is simply issued so that the abnormality can be recognized. Thus, if the vacuum valve in one of the numerous sewage drains connected to a vacuum type sewer system that is open and no longer closes, the vacuum in the vacuum sewer leaks from there and other vacuums in the vicinity. The valved sewage basin affects the vacuum pressure, and the vacuum valve of the sewage basin with the vacuum valve cannot be opened. Then, there is a possibility that the wastewater with the vacuum valve cannot suck the wastewater and the water level rises and overflows. If the vacuum sewer system falls into this abnormal state, all the sewage alarms with a vacuum valve in a certain range will be activated, and even if maintenance personnel are present, it is possible to determine which sewage tank with a vacuum valve is causing the abnormality. Disappear. An object of the present invention is to make it possible to easily identify an abnormal point in a vacuum type sewer system and quickly recover it. According to the present invention, a vacuum valve is interposed between a sewage tank equipped with a vacuum valve and a vacuum sewer pipe, and the sewage tank is opened by opening the vacuum valve when the water level of the sewage tank rises. Is connected to the vacuum sewer pipe, the waste water is carried out by the differential pressure between the atmospheric pressure acting on the water surface of the sewage drain and the vacuum pressure of the vacuum drain, and the vacuum valve is closed when the water level of the sewage drain falls. A water level detector that detects the water level of a sewage masque, a water level abnormality indicator that displays an abnormal water level of a sewage masque, a valve open / close detector that detects the opening and closing of a vacuum valve, and a vacuum valve A valve failure indicator that displays the opening and closing abnormalities of the valve, an elapsed time indicator that displays the elapsed time of the water level abnormality of the sewage squid and the opening and closing abnormality of the vacuum valve, and a water level based on the detection results of the water level detector and the valve open / close detector. Fault display, valve fault display and elapsed time display And a control device for operating the vessel. According to the first aspect of the present invention, the following operations are provided. The signal from the water level detector and the valve opening / closing detector provides an alarm display with the corresponding water level abnormality indicator or valve abnormality indicator, so if an abnormality occurs, the cause of the abnormality can be easily understood. By checking the elapsed time from the occurrence of the abnormality with the elapsed time indicator, it is possible to know which of the sewage tanks with the vacuum valve caused the abnormality first, thereby improving the convenience. [0008] As described above, abnormalities occur in a certain sewage system with a vacuum valve, and the effect of the sewage system with other vacuum valves on the surroundings is normal in a certain range or in all ranges. In the event that the system does not work properly, by checking the elapsed time from the occurrence of an abnormality in the alarm device of the individual sewage tank with a vacuum valve, it is possible to know which abnormality of the sewage tank with a vacuum valve caused the system to go down. Repair points can be easily identified, and quick recovery is possible. FIG. 1 is a schematic diagram showing a vacuum type sewer, FIG. 2 is a schematic diagram showing a main part of FIG. 1, and FIG. 3 is a block diagram showing an alarm device. As shown in FIGS. 1 and 2, a vacuum sewer pipe 14 extends from a vacuum pump station 16 in a branch shape, and a sewage with a vacuum valve (vacuum valve unit) 11 is installed at the end of the vacuum sewer 10 as shown in FIGS. Have been. That is, sewage discharged from each household or the like flows into a sewage tank 11 from a sewage inflow pipe 12 of a natural flow type. Once the sewage accumulates in the sewage sump 11A of the sewage sump 11, the vacuum valve 15 is opened, and the sewage in the sewage sump 11 is sucked through the suction pipe 13. Then, the sewage is sucked into the branch pipe 14A of the vacuum sewer pipe 14 through the vacuum valve 15, and the sewage sucked into the branch pipe 14A of the vacuum sewer pipe 14 is passed through the main pipe 14B of the vacuum sewer pipe 14 to a vacuum pump. Place 1
And then sent to a sewage treatment plant by a pressure pump. At this time, in the vacuum sewer 10, a ventilation pipe 17 is extended from the ground or the sewage tank 11, and the ventilation pipe 17 can introduce air for pressurizing the sewage into the upper space of the sewage tank 11. . In the vacuum type sewer 10, the vacuum pressure applied to the vacuum sewer pipe 14 is used as a power source for driving the vacuum valve 15 to open, and a breather pipe 43 extending from the ground or the vacuum valve 15 is provided. As described below, the atmosphere introduced by
It is a power source for closing and driving the vacuum valve 15. Therefore, in the vacuum type sewer 10, when the water level of the sewage tank 11 rises above a certain level,
The vacuum valve 15 is opened, the vacuum pressure in the vacuum type drain pipe 14 is applied to the suction pipe 13, the atmospheric pressure acting on the water surface of the sewage tank 11 to pressurize the sewage, and the vacuum applied to the suction pipe 13. The sewage in the sewage basin 11 is sent to the collecting tank of the vacuum pumping station 16 via the branch pipe 14A and the main pipe 14B of the vacuum sewer pipe 14 by the pressure difference with the pressure. However, in the case of the vacuum sewer 10, an abnormality occurs in a certain sewage tank 11, and when a vacuum leaks, the influence of the vacuum leak is transmitted to the nearby sewage tank 11 connected to the vacuum sewage pipe 14. The number of sewage tanks 11 that are under suction pressure increases with time. Then, sewage overflows sequentially from the sewage basin 11 having the largest inflow of sewage. Therefore, in the present embodiment, an alarm device 100 as shown in FIG. 3 is provided in order to prevent such inconvenience from occurring. The alarm device 100 includes a control device 101, a water level detector 102, a water level abnormality indicator 103, a valve open / close detector 1
04, a valve abnormality display 105, an elapsed time display 106, and a power supply 107. The water level detector 102 detects the water level of the sewage tank 11. The water level abnormality indicator 103 displays the water level abnormality of the dirty water 11. The valve opening / closing detector 104 is a vacuum valve 1
5 is detected. The valve abnormality indicator 105 is the vacuum valve 1
5 is displayed. The elapsed time display 106 displays the elapsed time of the abnormal water level of the dirty water tank 11 and the abnormal opening and closing of the vacuum valve 15. Based on the detection results of the water level detector 102 and the valve open / close detector 104, the control device 101 controls the water level abnormality display 103, the valve abnormality display 105, and the elapsed time display 106.
Activate That is, the control device 101 determines (a) a water level abnormality when the detection result of the water level detector 102 exceeds a preset standard water level, displays the water level abnormality on the water level abnormality display 103, and (b) When the valve opening / closing detector 104 detects a valve opening, the valve opening time is counted, and when it exceeds a preset standard valve opening time, a valve abnormality is determined. And (c) above
Count the elapsed time from the detection of the abnormalities in (a) and (b),
This is displayed on the elapsed time display 106. Hereinafter, the alarm operation of the alarm device 100 and the action of the maintenance staff will be described. (A) Alarm operation of the alarm device 100 (abnormal state 1) If the vacuum valve 15 does not open or opens only a little for some reason, the sewage in the sewage tank 11 will not be carried to the treatment plant, so the sewage water level Rises, the water level detector 102 operates and sends a signal to the control device 101, and the control device 101 receives the signal and activates the water level abnormality indicator 103 to notify an abnormality to the ground and detect the abnormality. Is displayed on the elapsed time display 106. (Abnormal state 2) When the vacuum valve 15 is not closed while being opened for some reason. When the vacuum valve 15 is opened, the valve open / close detector 104 is activated, and the control device 101 determines the time in the open state. Start measuring. When the predetermined time has elapsed, the control device 101 determines that an abnormality has occurred, activates the valve abnormality indicator 105, reports the abnormality to the ground, and displays the time since the abnormality was detected on the elapsed time indicator 106. indicate. Immediately after the occurrence of the abnormality, the sewage in the sewage tank 11 is transported to the treatment plant due to the remaining vacuum pressure. However, if the water level detector 102 is activated by the sewage flowing in thereafter, the control device 101 sets the valve abnormality indicator 105 and the water level. Both abnormality indicators 103 are activated. In addition, since the vacuum pressure of the other surrounding sewage tank 11 is reduced and the sewage cannot be transported, the sewage water level in the sewage tank 11 rises, the water level detector 102 operates, and the display of the water level abnormality and the elapsed time is displayed. Is made. (B) Behavior of maintenance personnel (abnormal state 1) The sewage tank 11 in which the water level abnormality indicator 103 is operating is judged to be abnormal, and repair is performed. (Abnormal state 2) Sewage in which the valve abnormality indicator 105 or the water level abnormality indicator 103 or both the valve abnormality indicator 105 and the water level abnormality indicator 103 are operating.
The elapsed time displayed on the elapsed time display 106 is compared, and the sewage tank 11 in which the abnormality first occurred is determined to be abnormal, and repair is performed. After the vacuum pressure is restored, if there is any sewage tank 11 indicating an abnormality, the corresponding sewage tank 11 is restored. Therefore, according to the present embodiment, the following operation and effect can be obtained. A signal is output from the water level detector 102 and the valve opening / closing detector 104 to display an alarm by the corresponding water level abnormality indicator 103 or the valve abnormality indicator 105. Therefore, when an abnormality occurs, the cause of the abnormality can be easily determined. I understand,
By examining the elapsed time from the occurrence of the abnormality with the elapsed time display 106, it is possible to know which of the sewage tanks with a vacuum valve caused the abnormality first, thereby improving the convenience. As described above, an abnormality occurs in one of the sewage tanks 11 with a vacuum valve, and the effect of the abnormality on the other sewage tanks 11 with a vacuum valve is limited to a certain extent or the whole range. Does not work properly, by examining the elapsed time from the occurrence of an abnormality in the alarm device 100 of each of the sewage tanks 11 with a vacuum valve, it is possible to find out which abnormality of the sewage tank 11 with a vacuum valve caused the system down. Therefore, the repair point can be easily specified by the maintenance staff, and prompt restoration can be performed. Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration of the present invention is not limited to the embodiment, and the design of the present invention is not limited within the scope of the present invention. Modifications and the like are included in the present invention. For example,
The shape and position of the detectors 102 and 104 shown in FIG. 2 may be anything as long as they can detect the sewage level and the open state of the valve. In addition, any of the displays 103 and 105 may be any as long as it has a function such as character display, lighting of a lamp, flashing of a lamp, sounding of a buzzer, and the like, which can be determined as normal.
The elapsed time display 106 is a character display, a diagram, lighting of a lamp,
Anything can be used as long as the time has elapsed, such as blinking. As described above, according to the present invention, it is possible to easily identify an abnormal part of the vacuum sewer system and quickly recover it.

[Brief description of the drawings] FIG. 1 is a schematic view showing a vacuum type sewer. FIG. 2 is a schematic view showing a main part of FIG. 1; FIG. 3 is a block diagram showing an alarm device. [Explanation of symbols] 10 Vacuum sewer 11 filthy water 14 Vacuum drain 15 Vacuum valve 100 alarm device 101 control device 102 Water level detector 103 Water level abnormality indicator 104 Valve open / close detector 105 Valve error indicator 106 Elapsed time display

Claims (1)

(57) [Claims] [Claim 1] A vacuum valve is interposed between the sewage tank with a vacuum valve and the vacuum sewer pipe, and when the water level of the sewage tank rises, the vacuum valve is opened and the sewage tank is evacuated. It is configured to conduct sewage by discharging the sewage by the differential pressure between the atmospheric pressure acting on the surface of the sewage pipe and the vacuum pressure of the vacuum sewage pipe, and to close the vacuum valve when the sewage water level drops. A water level detector that detects the level of sewage masque, a water level abnormality indicator that displays an abnormal level of sewage mas, a valve open / close detector that detects the opening and closing of a vacuum valve, and an opening and closing of a vacuum valve A valve error indicator that displays an error, an elapsed time indicator that displays the sewage water level error and the elapsed time of the vacuum valve open / close error, and a water level error display based on the detection results of the water level detector and the valve open / close detector Indicator, valve error indicator and elapsed time indicator are activated. That the control unit and the alarm system sewerage system characterized by comprising a.