KR20210012360A - Wastewater manhole equipped with function of sensing misconnection and water quality/quantity - Google Patents

Abstract

According to the present invention, a first water level sensor (S1) and a second water level sensor (S2) are installed at a position lower than a wastewater pipe (10) from a bottom (B) in a manhole (1) for wastewater capable of sensing misconnection and measuring water quality/flow. An opening/closing valve (40) is installed on an intercepting sewer (20) side to measure the time taken for the operation of the second water level sensor (S2) from the operation of the first water level sensor (S1) while the opening/closing valve (40) is closed to calculate flow. A misconnection sensor (S4) is installed at a position higher than the wastewater pipe (10) in the manhole (1) to monitor misconnection by the operation of the misconnection sensor (S4) when it rains. A backflow sensor (S5) is installed on an upper side in the manhole (1) to sense the inside of the manhole (1) reaching a dangerous water level. A control box (50) is provided on the ground on an upper portion of the manhole (1). A water quality measurement sensor (S6) for pumping wastewater in the manhole (1) to measure water quality is provided on the control box (50). A transceiving module (52) for transmitting signals sensed by the multiple sensors (S0, S1, S2, S4, S5, S6) to a remote control room is provided on the control box (50).

Description

WASTEWATER MANHOLE EQUIPPED WITH FUNCTION OF SENSING MISCONNECTION AND WATER QUALITY/QUANTITY}

The present invention relates to a manhole for sewage, in which a plurality of sensors are installed inside the manhole to detect incorrect contact and measure water quality and flow rate according to a change in the water level of sewage.

In general, sewage pipe refers to a passage through which household sewage generated at home, factory wastewater from factories or workplaces, and sewage collected through the drainage channel of the road are drained, and such sewage pipes are divided into confluence and classification. Is a method of flowing sewage and rainwater into a single sewage pipe, and in the classification system, a sewage pipe through which sewage flows and a sewage pipe through which rainwater flows are separately installed, so that the sewage is sent to the sewage treatment plant and flowed into the excellent river.

In the case of the classification type sewer, excessive rainwater (including groundwater) flows into the sewage pipe system during concentrated lakes, causing the problem of the classification type sewer overflow (SSOs).

As described above, in the fractional sewage system, there is a problem in that the amount of inflow sewage increases and the quality of the inflow water decreases due to intrusion water or inflow water other than the sewage entering the conduit, as well as the problem of decreasing the sewage treatment efficiency. It is necessary to connect sewage pipes of rainwater pipes, which are the main causes of influent water, that is, to detect incorrect junctions, and to establish a mid- to long-term sewage maintenance plan by monitoring the quality and flow of incoming sewage in real time for the management of sewage. Even if there is a risk of sewage overflowing to the manhole cover due to clogging, etc., it is necessary to immediately detect it and take action.

As a prior art related to the present invention, the'manhole water level and flow rate detection device' of Patent Document 1 detects the water level inside each manhole by differential pressure and outputs a preset signal in response to the occurrence of abnormal water level. It is designed to quickly process maintenance by location and to correct the error in flow rate due to abnormal water level. However, as the water level is detected by differential pressure, there is a risk of malfunction due to foreign substances and sludge contained in the sewage. There was a disadvantage that it was difficult to maintain because it was always submerged in water.

The'System and Method for Sewer Pipe Management' in Patent Document 2 uses a sewer pipe monitoring device installed on the upper part of the sewer pipe manhole to measure and transmit the water depth in the manhole, and the correlation between the flow rate and the water depth from the transmitted depth information of the manhole. It includes a sewage management server that calculates the flow rate of the sewage pipe.In this method of measuring by an ultrasonic sensor, since the sensor is installed on the floor, it is difficult to maintain and maintain it, and a lot of errors occur due to foreign substances and sludge. Since the flow rate is measured by using the flow rate, foreign substances such as hair are caught in the propeller to measure the flow rate, so that normal operation is not possible, so that the sensor area has to be cleaned at all times.

In addition, the'water level measuring system provided on the manhole cover' of Patent Document 3 is also designed to measure the water level using ultrasonic waves, and the'remote management system that provides automatic notification of the internal state of the manhole' of Patent Document 4 also It is configured to provide information remotely by detecting the water level inside the manhole, air condition, misalignment, humidity, etc., but it is difficult to clean the manhole s part because it is in a humid state, and the sensor installed on the manhole cover may be lost when strong water pressure occurs. There was this.

Korean Patent Registration No. 10-0907502 (2009.07.06.) Korean Patent Registration No. 10-1659310 (2016.09.19.) Korean Patent Registration No. 10-1741410 (2017.05.24.) Korean Patent Registration No. 10-1940224 (2019.01.14.)

The present invention has been conceived to solve the above problems, and an object of the present invention is to provide a sewage manhole capable of measuring the quality and flow rate of manhole sewage in a fractionated sewage pipe and monitoring incorrect contact.

In order to achieve the above object, in the present invention, a sewage pipe is connected to a predetermined height at a lower part of one side, and a sewage pipe or a car collection pipe connected to a sewage treatment plant is connected to the floor, and the upper part is a sewage manhole equipped with a cover to allow an operator to enter from the ground. in,

Inside the manhole, a first water level sensor and a second water level sensor are installed up and down at a position lower than the sewage pipe from the bottom, and an on/off valve is installed on the side of the vehicle collection pipe to prevent the operation of the first water level sensor from being closed. 2 Measure the time required to operate the water level sensor so that the flow rate can be calculated,

In the inside of the manhole, a false contact detection sensor is installed at a higher position than the sewage pipe to enable false contact detection by operating the false contact detection sensor in clear or rainy weather,

A reverse flow sensor is installed on the upper side of the inside of the manhole to detect that the inside of the manhole reaches a dangerous level,

A control box is provided on the ground above the manhole, and a water quality measurement sensor is provided in the control box to measure the water quality by pumping the sewage inside the manhole, and a sewage inlet pipe for pumping the sewage inside the manhole is installed. , At the lower end of the sewage inlet pipe, a water quality sensor consisting of another water level sensor for initiating water quality measurement is installed above the daily maximum sewage water level.When the water level is detected by the water quality sensor, the water quality in the state in which the open/close valve is closed. When starting the measurement and measuring the flow rate, the water quality is measured at the same time, and the control box is equipped with a transmission/reception module that transmits the signals detected by the plurality of sensors to the remote control room, enabling false contact detection and water quality/flow measurement. Provide a manhole for sewage.

According to an embodiment of the present invention, since it is possible to monitor incorrect contact with the water level of the sewage manhole when it rains, it can be seen that rainwater flows into the sewage pipe.If the water level of the manhole reaches the dangerous water level, it is immediately notified to the remote control room to take action. In the event of a rise in the water level due to sediment, it is possible to predict the dredging time of the sewage manhole, and by measuring the flow rate and water quality at the same time, it is possible to facilitate planning, management and control of the sewage treatment facility. There is this.

1 is a cross-sectional structure diagram of a manhole for sewage according to an embodiment of the present invention,
Figure 2 is a plan view of the manhole for sewage shown in Figure 1,
3 is an enlarged view of part A of FIG. 1 in a state in which a valve for measuring water quality is opened,
4 is a cross-sectional view of a valve for measuring water quality in FIG. 3 in a closed state;
Figure 5 shows a state in which the flow rate is measured in the present invention, in a state in which the first water level sensor is turned on due to the rise of the water level when the expansion valve is closed,
6 is a state in which the second water level sensor is turned on after time in FIG. 5
7 is a cross-sectional structure diagram of a manhole for sewage showing another embodiment of the present invention,
8 is a state in which the inspection port is opened in FIG. 7.

Hereinafter, preferred embodiments that do not limit the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 shows a manhole for sewage according to an embodiment of the present invention, which has a sewage pipe 10 connected to a predetermined height at a lower portion of one side, and a sewage pipe or a blocking pipe 20 connected to a sewage treatment plant on the floor. And, the upper part is a manhole for sewage (1) provided with a lid (30) to allow the operator to enter from the ground,

Inside the manhole (1), a first water level sensor (S1) and a second water level sensor (S2) are installed at different heights from the floor (B) to a position lower than the sewage pipe (10), and open and close at the side of the vehicle collection pipe (20). In the state where the valve 40 is installed and the on/off valve 40 is closed, the flow rate can be calculated by measuring the time taken for the operation of the first water level sensor S1 to the operation of the second water level sensor S2,

In the inside of the manhole 1, a false contact detection sensor (S4) is installed at a higher position than the sewage pipe 10 so that a false contact detection sensor (S4) operates in rainy weather, thereby enabling false contact detection,

A reverse flow sensor (S5) is installed on the upper side of the inside of the manhole (1) to detect that the inside of the manhole (1) reaches a dangerous water level,

A control box 50 is provided on the ground above the manhole, and the control box 50 is provided with a water quality measurement sensor S6 for measuring water quality by pumping the sewage inside the manhole 1, the manhole ( 1) A sewage inlet pipe (L1) for pumping internal sewage is installed, and at the lower end of the sewage inlet pipe (L1), another water quality sensor (S0) is installed to start water quality measurement above the maximum daily sewage level. When the water level is detected by this water quality sensor (S0), the water quality measurement is started while the on/off valve 40 is closed, and the water quality is measured at the same time even when the flow rate is measured, and the control box 50 has A transmission/reception module 52 for transmitting signals detected by the plurality of sensors (S0, S1, S2, S3, S4, S5, S6) to a remote control room is provided to enable false contact detection and water quality/flow measurement. .

In the drawings, reference numeral 54 denotes a warning light, reference numeral 56 denotes a solar panel, and reference numeral S3 denotes a spare sensor. It is operated when the first and second sensors malfunction to detect whether the first and second sensors are malfunctioning, or As an aid, it can be used to measure flow.

In addition, the symbol F is an inspection ladder, which is fixedly installed on the inner wall surface of the manhole 1, and the sensors (S0, S1, S2, S3, S4, S5) are at a predetermined height above and below the outside of the sewage inlet pipe (L1). Each of them is fixedly installed.

In addition, the symbol E is an elbow pipe for preventing scattering to prevent a malfunction in the sensors (S1, S2) when the sewage water flows into the manhole (1) from the sewage pipe (10) or to prevent foreign substances contained in the waste water from being caught on the sensor. .

In this embodiment, a sewage inlet pipe (L1) is installed between the water quality measurement sensor (S6) of the control box (50) and the inside of the manhole (1), and the sewage inlet pipe (L1) is normally a sewage inlet pipe ( L1) is closed to maintain the state of being filled with sewage, and is opened when measuring water quality, and a valve (V1) that supplies sewage to the water quality measurement sensor (S6) and a pump to pump sewage are installed.

In the drawings, the pump is not shown, which is built into the control box 50, and is driven using electricity or commercial electricity generated from the above-described solar panel.

In the drawing, reference numeral L2 is a sewage discharge pipe for returning the sewage to the manhole 1 after measuring the water quality.

On the other hand, the valve (V1) is composed of an air expansion valve that is closed by air expansion as shown in FIG. 4 and is opened as shown in FIG. 3 by its own contraction force, which is through the air hose (H1). It is operated by receiving compressed air from an air compressor (not shown) installed on the ground.

In addition, in this embodiment, the opening/closing valve 40 is also composed of an air expansion valve, and a closing operation is performed by receiving compressed air from an air compressor (not shown) installed on the ground through another air hose H2. The opening operation is made by the self-contracting force.

A process of measuring the flow rate of sewage in the present embodiment configured as described above will be described as follows.

In this embodiment, the flow rate measurement method is shown in Figs. 5 and 6, where the first in a state where the on/off valve 40 is closed, the sewage flows into and fills the inner space of the manhole 1 while maintaining a downward sagging state. As the water level sensor (S1) is heard by the buoyancy of the sewage, the internal switch is turned on to send a signal to the control box 50, and the second water level sensor (S2) is sent from the first water level sensor (S1). As shown in FIG. 6, when the water level in the interior space of the manhole 1 increases while being installed at a predetermined height, the internal switch is turned on as shown in FIG. ) By sending a signal to the water level change from the first water level sensor (S1) to the second water level sensor (S2), that is, the height between the first and second water level sensors (S1, S2) in the inner space of the manhole in the form of a circular cross section By measuring and calculating the time until the amount of wastewater is filled, it is possible to accurately measure the amount of wastewater (flow rate) per second, minute, or hour. That is, the quantity corresponding to the height from the first water level sensor (S1) to the second water level sensor (S2) is between the first and second water level sensors (S1, S2) in the floor area of the manhole (1). The quantity is measured by multiplying the height, and the flow rate of sewage per second/minute/hour can be measured by measuring the time until the measured quantity is filled. If the amount of sewage is not constant, the above If the measured flow rate is measured several times at a predetermined time interval and the measured flow rate is divided by the number of measurements, it is possible to measure a flow rate close to the actual amount of sewage.

The first and second water level sensors (S1, S2) preferably use the tilt flow switch method as shown in the drawing. This is because a mechanical switch or a mercury switch is built into the sealed float. It is suitable for measuring the level of the same liquid.

On the other hand, the false contact detection sensor (S4) does not react because there is not much flow of sewage flowing into the manhole during clear weather, and reacts when the flow rate is abnormally increased due to various factors during clear or rainy weather. It is notified that there is other inflow or intrusion water.Since manholes for sewage are installed at regular intervals, when the false contact detection sensor (S3) reacts, it checks whether the sewage pipe connected to the manhole or rainwater pipe is incorrectly contacted to improve existing old pipes and It is used as information that can improve the misrepresentation situation.

On the other hand, the water quality sensor (S0) at the bottom is installed above the maximum daily sewage level, so under normal conditions, the water quality sensor (S0) remains off, causing an abnormal increase in the amount of sewage. When the water quality sensor (S0) is turned on, at this time, the operation to measure the water quality is started. First, when the opening/closing valve 40 is shut off, the water level inside the manhole 1 rises and the first water level When the sensor (S1) is turned on, the valve (V1) is opened for pumping of sewage, and the pump is operated at the same time as the sewage inlet pipe (L1) and the sewage water inside the manhole (1) is installed in the control box (50). It is supplied to the water quality sensor (S6) to measure the water quality.

The above-described water quality measurement is not only in the situation where the daily maximum sewage level is exceeded, but also when the flow rate is measured, water quality and flow data are stored and transmitted by measuring the water quality.

That is, even when measuring the flow rate, when the valve 40 expands at a predetermined time and the intercept pipe 20 is closed, the sewage in the manhole 1 fills up and the first water level sensor S1 turns on, the sewage introduction pipe The valve (V1) of (L1) is contracted as shown in FIG. 3, the pump is operated, and the sewage is pumped to the sewage inlet pipe (L1), and the water quality sensor (S6) provided in the control box (50) measures the water quality. After measurement, the sewage is discharged back to the manhole (1) through the sewage discharge pipe (L2).The discharge of sewage is measured by locking the sensor part by reducing the amount of discharged less than the amount of inflow, and immediately after the water quality measurement is finished, the valve (V1) By inflating the wastewater inlet pipe (L1) to maintain the state filled with sewage, it is possible to prevent the occurrence of a situation in which the pumping is not possible when air enters the sewage inlet pipe (L1) during the next water quality measurement.

7 shows a manhole 1 according to another embodiment of the present invention, which has the same basic configuration as the first embodiment described above, except that the on/off valve 40 is isolated from the interior of the manhole 1 It is installed in the valve chamber (C) and is provided with an inspection hole (D) in communication with the inside of the manhole (1), so that the flow rate of the manhole is measured according to the change in the water level inside the manhole (1). The cross-sectional area is made to form a simple circular or rectangular shape to facilitate measurement of flow rate.

On the other hand, in the first embodiment described above, since the on-off valve 40 is installed inside the manhole 1, a separate swash plate P 2), etc. must be installed, and there is a problem that the calculation of the cross-sectional area of the manhole 1 becomes complicated.In this embodiment, in order to solve this point, the on-off valve 40 is separated from the manhole 1 It is installed in the valve chamber (C).

FIG. 8 shows a state in which the inspection port D is opened to check the valve chamber C, and the operator enters the manhole 1 and opens the inspection port D to inspect the valve chamber C.

1: Manhole for sewage
10: sewage pipe
20: Tea house pipeline
30: lid
40: on-off valve
50: control box
52: sending/receiving module
54: warning light
56: solar panel
B: manhole bottom
C: valve chamber
D: Inspection hole
E: Elbow pipe for preventing scattering
F: Inspection ladder
H1,H2: Air hose
L1: Sewage inlet pipe
L2: Sewage discharge pipe
S0: water quality sensor
S1: 1st water level sensor
S2: 2nd water level sensor
S3: spare sensor
S4: Incorrect contact detection sensor
S5: Backflow sensor
S6: Water quality measurement sensor
P: swash plate
V1: valve

Claims (5)

The sewage pipe 10 is connected to a predetermined height at the bottom of one side, and the tea pick-up pipe 20 connected to the sewage treatment plant is connected to the bottom, and the upper part is a sewage manhole (1) equipped with a lid 30 so that an operator can enter from the ground. in,
Inside the manhole (1), a first water level sensor (S1) and a second water level sensor (S2) are installed at a position lower than the sewage pipe (10) from the floor (B), and an opening/closing valve (40) on the side of the vehicle collection pipe (20) ) Is installed to measure the time taken from the operation of the first water level sensor (S1) to the operation of the second water level sensor (S2) with the on/off valve 40 closed, so that the flow rate can be calculated,
In the inside of the manhole 1, a false contact detection sensor (S4) is installed at a higher position than the sewage pipe 10 so that a false contact detection sensor (S4) operates in rainy weather, thereby enabling false contact detection,
A reverse flow sensor (S5) is installed on the upper side of the inside of the manhole (1) to detect that the inside of the manhole (1) reaches a dangerous water level,
A control box 50 is provided on the ground above the manhole, and the control box 50 is provided with a water quality measurement sensor S6 for measuring water quality by pumping the sewage inside the manhole 1, the manhole ( 1) A sewage inlet pipe (L1) for pumping internal sewage is installed, and at the lower end of the sewage inlet pipe (L1), another water quality sensor (S0) is installed to start water quality measurement above the maximum daily sewage level. When the water level is detected by this water quality sensor (S0), water quality measurement is started, and the water quality is also measured at the same time each time the flow rate is measured, and the plurality of sensors (S0, S1, S2, S3, S4, S5, S6), characterized in that the transmission and reception module 52 for transmitting the signal detected in the remote control room (52) is provided with a false contact detection and water quality / flow rate measurement is possible.
The method according to claim 1,
A sewage inlet pipe (L1) is installed between the water quality measurement sensor (S6) of the control box 50 and the inside of the manhole (1), and the sewage inlet pipe (L1) is It is closed to maintain the filled state, and is opened when measuring water quality, and a valve (V1) that supplies sewage to the water quality measuring sensor (S6) and a pump to pump sewage are installed, and the sewage discharge pipe (L2) after water quality measurement is completed. ) Through the manhole again, characterized in that it is discharged to the manhole (1), and the manhole for sewage that can measure the water quality / flow rate.
The method according to claim 2,
The valve (V1) is a manhole for sewage capable of detecting incorrect contact and measuring water quality/flow rate, characterized in that it is made of an air expansion valve that is closed by air expansion and opened by its own contraction force.
The method according to claim 1,
The opening/closing valve 40 is installed in a valve chamber (C) isolated from the inside of the manhole (1), and the valve chamber (C) is provided with an inspection hole (D) in communication with the inside of the manhole (1). Manhole for sewage that can detect incorrect contact and measure water quality/flow.
The method according to claim 1,
Inside the manhole (1), when the wastewater flows into the manhole (1) from the wastewater pipe (10), the sensors (S0, S1, S2, S3) cause a malfunction or foreign substances contained in the waste water are detected by the sensors (S0, S1, Sewage manhole capable of detecting incorrect contact and measuring water quality/flow, characterized in that an elbow pipe (E) for preventing scattering to prevent getting caught in S2, S3) is installed.

Images