JP4726352B2 - Drainage pipe blockage detection system and drainage pipe blockage automatic avoidance system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a technique for avoiding blockage of a drainage pipe of a building, and in particular, a drainage pipe blockage detection system capable of easily detecting a blockage state due to residual or accumulated solid matter in a drainage pipe in a large drainage system, and the like. The present invention relates to a drain pipe blockage automatic avoidance system that can automatically remove solids or the like remaining or accumulated in the drain.
[0002]
[Prior art]
The drainage system of buildings is generally a gravity system in which drainage flows under its own weight. In this case, solids and the like are likely to remain or accumulate in the horizontal pipe (with a downward slope) where the direction of drainage does not coincide with the direction of gravity. There is a risk of blockage.
[0003]
Recently, a disposer or the like that pulverizes raw garbage and discharges it into the drain pipe has become widespread, and the pulverized material discharged from the disposer may clog the drain pipe. Therefore, conventionally, washing for removing solid matter remaining in or deposited on the drain pipe using a flexible wire, high-pressure water, or the like is performed manually or periodically as necessary.
[0004]
[Problems to be solved by the invention]
However, the conventional drain pipe cleaning method requires dedicated equipment and manpower, which increases costs. Further, during the cleaning period, the drainage pipe of the building cannot be used, and there are various restrictions such as generation of noise during cleaning and the need for witnesses.
[0005]
Further, in the conventional cleaning method, if the cleaning is neglected, the solid matter or the like remains in the drain pipe for a long period of time while it remains or accumulates, and a large amount of solid matter or the like remains or accumulates in the drain pipe. There was a problem that the tube was blocked and solids could not be easily removed.
[0006]
And when it became such a state, the pressure in a drain pipe rose, and the reverse flow from the terminal instrument connected to the drain pipe, and the phenomenon of the sealing water jumping out by the trap sometimes occurred. Moreover, the drainage pipe corrodes due to the deposits in the drainage pipe, and the drainage may leak into the building due to a blockage accident caused by the corrosion product (rust hump) or drilling of the pipe.
[0007]
On the other hand, as described in JP-A-9-125482, a cleaning pipe is connected to a drainage pipe system through a control valve, and the control valve is periodically opened to clean the drainage pipe. There is an automatic cleaning device that discharges water. However, since this automatic cleaning device discharges the cleaning water periodically regardless of the state of the drain pipe being blocked, the cleaning water is discharged even when there is no solid matter remaining or accumulated in the drain pipe. Therefore, there was a problem of wasting water resources unnecessarily.
[0008]
In order to solve the above problem, the applicant of the present application has previously been provided with a solid matter means for detecting residual matter or accumulation of solid matter in a drain pipe as Japanese Patent Application No. 2000-1229839 (hereinafter referred to as a prior application). We have applied for automatic drainage blockage avoidance equipment.
[0009]
Next, the contents of the prior application will be described with reference to FIG. FIG. 2 is a diagram showing the configuration of the drainage pipe automatic avoidance facility of the prior application. In FIG. 2, a water tank 11 for storing cleaning water for cleaning the gravity drainage system 1 (which means the entire drainage pipe including the horizontal main pipe 2 and the standing main pipes 3 and 6), and the water tank 11 A pipe 12 that connects the drainage system 1 and an electromagnetic valve 13 that is an on-off valve provided in the pipe 12 are provided. Further, a pressure sensor 14 as a detection means for detecting clogging of the drainage system 1 (solid matter remaining in or accumulation in the drainage pipe) and the opening / closing operation of the electromagnetic valve 13 are controlled based on the detection signal of the pressure sensor 14. The water discharge controller 15 is provided. A vent pipe 5 communicates with the upper part of the standing main pipes 3 and 6 as appropriate.
[0010]
The pipe 12 is connected to the leg 4 of the standing main pipe 3 connected to the end of the horizontal main pipe 2 of the drainage system 1 or to the ventilation pipe 5 on the upper side of the standing main pipe 3 as indicated by the wavy line in FIG. Connected. This is because the deposits and the like are mainly deposited on the horizontal main pipe 2, so that the cleaning water is discharged from an appropriate location of the upstream main pipe 3 upstream thereof. The upper end of the pipe 12 is connected to the water tank 11.
[0011]
An electromagnetic valve 13 is disposed in front of the leg portion 4 of the standing main pipe 3. Further, in the drainage system 1, the pressure sensor 14 is provided at a site where solids or the like are likely to remain or accumulate, and an increase in pressure in the drainage system 1 when the drainage flows due to the remaining or accumulated solids or the like can be appropriately detected. is set up. That is, when only one system of the standing main pipe 3 of the drainage system 1 is provided, the pressure sensor 14 is installed on the leg portion 4 of the standing main pipe 3 immediately adjacent to the junction of the standing main pipe 3 and the horizontal main pipe 2. Further, when a plurality of vertical main pipes 3 and 6 are provided, the leg 4 of the vertical main pipe 3 in the uppermost stream part and the junction 7 of the vertical main pipe 6 and the horizontal main pipe 2 in the second and subsequent downstream systems A pressure sensor 14 is installed on the downstream side of the horizontal main pipe 2.
[0012]
The capacity of the water tank 11 and the diameter of the pipe 12 are appropriately set according to the convenience of each building, such as the specifications of the drainage system 1 and the usage method. The water tank 11 is always provided with a water level sensor 16 for monitoring the water level and a water supply electromagnetic valve 17 for maintaining the water holding. Then, the electromagnetic valve 17 for makeup water is opened and water is supplied to the water tank 11.
[0013]
The water discharge controller 15 is disposed between the pressure sensor 14 and the cleaning electromagnetic valve 13. The water discharge controller 15 is set with an upper limit pressure Pu that predicts a drainage failure due to residual solids or accumulation of solid matter or the like, with the normal pipe pressure Po of the drainage system 1 when the drainage flows at the place where the pressure sensor 14 is installed as a reference pressure. When the number of times that the detected pressure P of the pressure sensor 14 exceeds the upper limit pressure Pu is equal to or greater than the upper limit number N, the cleaning electromagnetic valve 13 is opened and the cleaning water in the water tank 11 is passed to the drainage system 1. Water.
[0014]
The water discharge controller 15 records the detection signal of the pressure sensor 14 and commands the opening / closing operation of the cleaning electromagnetic valve 13 based on the set values of the reference pressure Po, the upper limit pressure Pu and the upper limit number N. Moreover, the water discharge controller 15 can restrict | limit the time slot | zone which performs water discharge in order to avoid the midnight and the early morning when noise becomes a problem. Further, a function for generating a warning or display signal when the detected pressure of the pressure sensor 14 exceeds a predetermined value, or when the occurrence frequency of the pressure equal to or higher than the upper limit pressure Pu exceeds a predetermined number N within a unit time. have. And while setting water discharge conditions according to the building in which the drainage system 1 was installed, it is possible to always display the blockage state of the drainage system 1.
[0015]
When make-up water is required for the water tank 11, the washing solenoid valve 13 of the drainage system 1 is closed by the signal of the water level sensor 16, and the water discharge to the drainage system 1 is stopped and the water tank make-up water is used. The water tank 11 is replenished until the solenoid valve 17 is opened and the set water level is reached.
[0016]
In the drainage facility having the drainage system 1 as shown in FIG. 2, when solid matter or the like remains or accumulates and adheres to the horizontal main pipe 2, the pressure increase value in the pipe near the pressure sensor 14 when the drainage flows from the end device. Is higher than the normal time when there is no residual or deposited solid matter.
[0017]
As described above, in the prior application, the residual or accumulated state of the solid matter in the drainage system 1 is monitored by detecting the pressure change in the drainage flow from the end device, and the residual or accumulated solid matter is automatically detected. However, the amount of waste water (domestic waste water) from the end device used for detecting the pressure change is different each time, and it is difficult to accurately measure the pressure change. In addition, as in the previous application, in the case of detecting the pressure change of the drainage when the drainage flows from the end device, if the solid matter pulverized by garbage is discharged into the drainage, it will be discharged. Depending on the amount and size of the solid matter to be detected, there is a problem that the change in pressure detected by the detection means may be affected and the residual or accumulated state of the solid matter in the tube may not be detected accurately. It was.
[0018]
An object (object) of the present invention is to provide a drainage pipe blockage detection system capable of accurately detecting a blockage state due to residual or accumulated solid matter in a drainage pipe even when solids are mixed in the drainage, and the drainage pipe. A drain pipe blockage automatic avoidance system using a blockage detection system is provided.
[0019]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a blower for sending air into a drain pipe, an air pressure detector for detecting an air pressure generated by the blower, and an arithmetic control for analyzing and recording a change in a detected value of the air pressure detector And by detecting that the air pressure has increased by a predetermined air pressure set in advance from an initial air pressure value when there is no solid matter remaining or accumulated in the drain pipe by the arithmetic control means. obtaining a drainage duct obstruction detection system for detecting blockage by residue or deposition of solid products of the tube. (Claim 1)
[0020]
With this configuration, when air is sent into the drain pipe by the blowing means, and there is a residue or deposit of solid matter or the like in the drain pipe, the detection pressure of the air pressure detecting means rises. Residual or deposition can be detected . In addition, this system uses a change in air pressure, unlike the system that detects the pressure change when the drainage flows from the end device, as in the previous application, so even in a system where solids are mixed in the discharged water. Accurate detection is possible.
[0021]
Further, the operation of the air blowing means for sending air into the drain pipe can be performed every predetermined time. (Claim 2 )
Further, the air pressure detecting means for detecting the air pressure generated by the air blowing means is provided after the rectifying grid and before the horizontal main pipe of the drain pipe, thereby improving the accuracy of air pressure detection. (Claim 3 )
[0022]
A blowing means for sending air into the drain pipe, an air pressure detecting means for detecting an air pressure generated by the blowing means, an arithmetic control means for analyzing and recording a change in a detected value of the air pressure detecting means, and the arithmetic control means. When it is detected that the air pressure has increased by a predetermined air pressure set in advance from the initial air pressure value when there is no solid matter remaining or accumulated in the drain pipe, the wash water from the water storage tank connected to the drain pipe By discharging the water, a drain pipe blockage automatic avoidance system characterized by removing solids or the like remaining or accumulated in the drain pipe can be obtained. (Claim 4 )
[0023]
Further, the operation of the air blowing means for sending air into the drain pipe can be performed every predetermined time. (Claim 5 )
Further, the air pressure detecting means for detecting the air pressure generated by the air blowing means is provided after the rectifying grid and before the horizontal main pipe of the drain pipe, thereby improving the accuracy of air pressure detection. (Claim 6 )
[0024]
DETAILED DESCRIPTION OF THE INVENTION
The configuration of the present invention will be described with reference to FIG.
FIG. 1 is a diagram showing a configuration of a drain pipe blockage detection system capable of accurately detecting a residual or accumulated state of solid matter or the like in a drain pipe of the present invention and a drain pipe blockage automatic avoidance system using the drain pipe blockage detection system. is there. In FIG. 1, a water tank 11 for storing washing water, and the water tank 11 and the drainage system are used to wash the entire drainage pipe including the gravity drainage horizontal main pipe 2 and the vertical main pipe 3. 1 and a solenoid valve 13 that is an on-off valve provided in the pipe 12 is provided.
In addition, a pneumatic sensor 21 serving as a detecting means for detecting clogging of the drainage system 1 (solid or remaining solids in the drainage pipe) and the opening / closing operation of the electromagnetic valve 13 are controlled based on the detection signal of the pneumatic sensor 21. The water discharge controller 15 is provided.
[0025]
Further, in FIG. 1, one of the blow pipes 23 having the same diameter as the drain pipe is joined and connected to the upper part of the leg (base) of the vertical pipe 3 of the drainage system, and the other blower pipe is connected to the suction section. 20 (for example, about 200CMH × 200pa) air outlets are connected. A rectifying grid 22 is provided at the blower outlet of the blower, and the air pressure sensor 21 is provided at the rear thereof. In addition, in FIG. 1, although the piping 12 connected to the water tank 11 and the electromagnetic valve 13 which store wash water, and the ventilation pipe 23 are joined and connected, both are connected to the standing pipe 3 separately. Also good.
[0026]
In the configuration of FIG. 1, when the drain pipe blockage detection system that can accurately detect the residual or accumulated state of solid matter or the like in the drain pipe is operated, the controller 15 analyzes and records the detected value of the air pressure sensor 21 during blowing from the blower 20. To do. The detected value when there is no solid matter remaining or accumulated in the drain pipe is defined as the initial value PoPa. The detected value when solid matter or the like remains or accumulates in the drain pipe increases by ΔPPa with respect to the initial value PoPa. Since ΔP can be ensured to be 10 Pa or more from the relationship between the blower capacity and the tube diameter, when solid matter or the like remains or accumulates, it can be clearly determined. In addition, it is not always necessary to perform the detection air blow from the blower 20, and the air can be appropriately blown.
[0027]
In this drainage pipe blockage detection system, solid matter remaining in or accumulated in the drainage pipe is detected based on the detected value of the air pressure sensor when the blower blows air. Even in the case of a system to be used, it is possible to accurately detect the residual or accumulated state of solids or the like in the drain pipe.
[0028]
As in the case of the previous application, the water discharge controller 15 uses the normal pressure Po at the place where the air pressure sensor 21 is set as a reference pressure, and an upper limit pressure Pu (Po + ΔP) that predicts a drainage failure due to residual solids or deposits. Is set, and when the number of times the detected pressure P of the air pressure sensor 21 exceeds the upper limit pressure Pu is equal to or greater than the upper limit number N, the electromagnetic valve 13 for cleaning is opened and the drainage system 1 is connected to the water tank 11. Drain the washing water.
[0029]
The water discharge controller 15 records the detection signal of the air pressure sensor 21 and commands the opening / closing operation of the cleaning electromagnetic valve 13 based on the set values of the reference pressure Po, the upper limit pressure Pu, and the upper limit number N. Moreover, the water discharge controller 15 can restrict | limit the time slot | zone which performs water discharge in order to avoid the midnight and the early morning when noise becomes a problem. Furthermore, when the detected pressure of the air pressure sensor 21 exceeds a predetermined value, or when the occurrence frequency of the pressure equal to or higher than the upper limit pressure Pu exceeds a predetermined number N within a unit time, a function for generating an alarm or display signal have. And while setting water discharge conditions according to the building in which the drainage system 1 was installed, it is possible to always display the blockage state of the drainage system 1.
[0030]
【The invention's effect】
According to the first aspect of the present invention, the air blowing means for sending air into the drain pipe, the air pressure detecting means for detecting the air pressure generated by the air blowing means, and the calculation for analyzing and recording the change in the detected value of the air pressure detecting means. Control means, and by detecting that the air pressure has increased by a predetermined air pressure set in advance from an initial air pressure value when no solid matter or the like remains or accumulates in the drain pipe by the arithmetic control means. By detecting clogging due to residual or accumulated solids in the drainage pipe, air is sent into the drainage pipe by a blower, and if residual solids or deposits exist in the drainage pipe, the air pressure detection means detects Since the pressure rises, it is possible to detect the residue or accumulation of solid matter in the drain pipe.
In addition, this system uses a change in air pressure, unlike the system that detects the pressure change when the drainage flows from the end device, as in the previous application, so even in a system where solids are mixed in the discharged water. Accurate detection is possible.
[0031]
In the invention according to claim 2 , since the operation of the blowing means for sending air into the drain pipe can be performed every predetermined time, it is not necessary to keep the blowing means constantly operated.
According to a third aspect of the present invention, the air pressure detecting means for detecting the air pressure generated by the air blowing means is provided at the subsequent stage of the rectifying grid and at the preceding stage of the horizontal main pipe of the drainage pipe, so that the accuracy of air pressure detection is achieved. Can be increased.
[0032]
According to a fourth aspect of the present invention, the air blowing means for sending air into the drain pipe, the air pressure detecting means for detecting the air pressure generated by the air blowing means, and the change in the detected value of the air pressure detecting means are analyzed and recorded. When the operation control means detects that the air pressure has increased by a predetermined air pressure set in advance from the initial air pressure value when there is no residue or accumulation of solids or the like in the drain pipe, By draining the wash water from the water storage tank connected to the drain pipe, a drain pipe blockage automatic avoidance system that removes solids remaining or accumulated in the drain pipe is obtained, and residual or accumulated solids etc. in the drain pipe are obtained. Can be automatically removed without human intervention.
[0033]
In the invention according to claim 5 , the operation of the blowing means for sending air into the drain pipe is performed every predetermined time, so that it is not necessary to keep the blowing means constantly operated.
In the invention described in claim 6 , the air pressure detecting means for detecting the air pressure generated by the air blowing means is provided at the rear stage of the rectifying grid and at the front stage of the horizontal main pipe of the drainage pipe, so that the accuracy of air pressure detection is achieved. Can be increased.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a prior application drain pipe blockage automatic avoidance system.
FIG. 2 is a diagram showing a configuration of a drain pipe blockage automatic avoidance system according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Drain pipe system 2 Horizontal main pipe 3, 6 Standing main pipe 4 Leg part 5 Vent pipe 7 Junction part 11 Water tank 12 Pipe 13 Washing solenoid valve 14 Pressure sensor 15 Water discharge controller 20 Blower 21 Pneumatic sensor 22 Rectification grid

Claims (6)

A blowing means for sending air into the drain pipe;
Air pressure detecting means for detecting air pressure generated by the blowing means;
Calculation control means for analyzing and recording a change in the detection value of the air pressure detection means,
By detecting that the air pressure has increased by a predetermined air pressure set in advance from the initial air pressure value when there is no solid matter remaining or accumulated in the drain pipe by the arithmetic control means, Drainage blockage detection system that detects blockage due to residue or accumulation. The drain pipe blockage detection system according to claim 1 , wherein the operation of the air blowing means for sending air into the drain pipe is performed every predetermined time. 3. The drain pipe blockage detection system according to claim 1, wherein the air pressure detection means for detecting the air pressure generated by the blower means is a rear stage of the rectifying grid and a front stage of the horizontal main pipe of the drain pipe. Stem. A blowing means for sending air into the drain pipe;
Air pressure detecting means for detecting air pressure generated by the blowing means;
Arithmetic control means for analyzing and recording changes in the detected value of the air pressure detecting means;
When it is detected by the arithmetic control means that the air pressure has increased by a predetermined air pressure set in advance from the initial air pressure value when there is no solid or the like remaining in the drain pipe, it is connected to the drain pipe. A drain pipe blockage automatic avoidance system characterized by removing solids remaining or accumulated in the drain pipe by discharging flush water from a water storage tank.   5. The drain pipe blockage automatic avoidance system according to claim 4, wherein the operation of the air blowing means for sending air into the drain pipe is performed every predetermined time. 6. The automatic avoidance of drainage pipe blockage according to claim 4 or 5 , wherein the air pressure detection means for detecting the air pressure generated by the blower means is a rear stage of the rectifying grid and a front stage of the horizontal main pipe of the drain pipe. system.

Images