JP3118049U - Liquid level control device for sewage - Google Patents

Abstract

In a sewage liquid level control device that controls the level of sewage in a sewage tank, the sensor prevents malfunctioning of the sensor by preventing the adhesion or entanglement of contaminants to the sensor and cleaning the sensor. Provided is a sewage liquid level control device which can be easily performed.
SOLUTION: A sensor 3 provided in a sewage tank 2 for detecting a liquid level, and a control device main body 6 for controlling a pump 5 based on detection by the sensor 3 and controlling a sewage liquid level in the sewage tank 2. In order to inject water toward the sensor 3 in the vicinity of the sensor 3, a front end opening 23 of the water injection pipe 22 is disposed in the waste water level control device 21. Provided is a sewage liquid level control device configured to continuously fill the vicinity of the sensor 3 with water to be poured or to wash the sensor 3 by continuously or intermittently pouring clear water.
[Selection] Figure 1

Description

  The present invention is for sewage equipped with a sensor for detecting a liquid level provided in a sewage tank, and a control device main body for controlling the level of sewage in the sewage tank based on detection by the sensor. The liquid level control device relates to a liquid level control device for sewage in which malfunction of a sensor is prevented.

A conventional liquid level control device for sewage will be described with reference to FIG.
In FIG. 4, reference numeral 1 denotes a conventional sewage liquid level control device. The sewage liquid level control device 1 is provided in the sewage tank 2 and detects the liquid level, and the detection by the sensor 3. And a control device main body 6 that controls the pump 5 and controls the liquid level of the sewage in the sewage tank 2.

  The sensor 3 is suspended in the sewage tank 2 and is contained in a vertical cylindrical storage container 7 that is open at both ends and is formed of a cylinder or a square tube having a plurality of holes 7a, 7a,. It is stored in.

  The sensor 3 is composed of a float sensor or an electrode rod sensor, and an upper limit sensor 8 for detecting an upper limit high liquid level in the sewage tank 2 and a pump operation sensor for detecting a liquid level for operating the pump 5. 9, a pump stop sensor 10 for detecting a liquid level for stopping the pump 5, and a lower limit sensor 11 for detecting a lower limit low liquid level in the sewage tank 2 are sequentially arranged from the upper side to the lower side. It consists of

Further, the upper limit sensor 8 and the lower limit sensor 11 are connected to the alarm device 12 via the control device main body 6, and the control device main body 6 is based on the detection signals of the upper limit sensor 8 and the lower limit sensor 11. An alarm signal is sent to 12, and the alarm device 12 is configured to issue an alarm when the alarm signal is received.
In the figure, reference numeral 13 denotes a support metal for the storage container 7.

  Thus, when sewage flows into the sewage tank 2 from a pipe (not shown) and the sewage is stored up to the position of the pump operation sensor 9 in the sewage tank 2, the pump operation sensor 9 detects the liquid level. A signal is sent to the control device body 6, and the control device body 6 sends a control signal to the pump 5 based on the signal from the pump actuation sensor 9 to operate the pump 5. By the operation of the pump 5, sewage is discharged out of the sewage tank 2 through the drain pipe 14.

  If the liquid level in the sewage tank 2 further rises and sewage is stored up to the upper limit sensor 8 position, the upper limit sensor 8 senses the liquid level and sends a signal to the control apparatus body 6. Based on the signal from the upper limit sensor 8, an alarm signal is sent to the alarm device 12 to activate the alarm device 12.

  On the other hand, when the level of sewage in the sewage tank 2 drops to the position of the pump stop sensor 10, the pump stop sensor 10 senses that level and sends a signal to the control device main body 6. Sends a control signal to the pump 5 based on the signal from the pump stop sensor 10 to stop the pump 5.

  Should the liquid level in the sewage tank 2 further drop and the sewage falls to the lower limit sensor 11 position, the lower limit sensor 11 senses the liquid level and sends a signal to the control device main body 6. Based on the signal from the lower limit sensor 11, an alarm signal is sent to the alarm device 12 to activate the alarm device 12.

For example, Patent Document 1 discloses a structure in which a sensor is attached to a sewage septic tank.
JP 2001-79575 A

However, the conventional liquid level control device for sewage has the following problems.
(1) Malfunctions due to contaminants in the sewage are likely to occur, especially when the sewage liquid level drops, contaminants etc. tend to get tangled in the sensor, causing the sensor to malfunction and the drain pump does not stop. In addition, there is a risk of contamination of the drainage pump, which may cause an accidental overheating of the drainage pump. Furthermore, when the level of sewage rises, sewage may overflow from the sewage tank.
(2) Cleaning of the sensor of the liquid level control device for sewage is performed manually. In this case, the operation is troublesome due to contamination.
Further, Patent Document 1 does not solve the above-described problem.

  In view of the above situation, the present invention is a sewage liquid level control device that controls the level of sewage in a sewage tank, and prevents the sensor from malfunctioning by preventing the attachment or entanglement of contaminants to the sensor. An object of the present invention is to provide a liquid level control device for sewage that can be easily prevented and the sensor can be easily cleaned.

In order to solve the above problems, the present invention provides the following configurations.
The device according to claim 1 is provided in a sewage tank and detects a liquid level, and a control device main body that controls a pump based on detection by the sensor and controls a sewage liquid level in the sewage tank; In the liquid level control device for sewage, a tip opening portion of the water injection pipe is disposed in the vicinity of the sensor so as to inject water toward the sensor, and relatively clear water is continuously supplied from the tip opening portion. The present invention provides a liquid level control device for sewage characterized by being configured to continuously fill the vicinity of the sensor with water to be injected or to wash the sensor by water injection or intermittent water injection.

  According to a second aspect of the present invention, the sensor is stored in a bottomed cylindrical storage container that is installed in the sewage tank and is open at the bottom of the storage container. Alternatively, the sewage liquid level control device according to claim 1, wherein the sewage liquid level control device is configured to communicate with the sewage tank through a plurality of openings.

  According to a third aspect of the present invention, there is provided the sewage liquid level control device according to the first or second aspect, wherein a spray nozzle is provided at a tip opening of the water injection pipe.

  According to a fourth aspect of the present invention, the sensor includes an upper limit sensor for detecting an upper limit high liquid level in the sewage tank, a pump operation sensor for detecting a liquid level for operating the pump, and a liquid level for stopping the pump. A sensor for stopping the pump to be detected and a lower limit sensor for detecting a lower limit low liquid level in the sewage tank are sequentially arranged from the upper side to the lower side, while the water injection pipe has a downstream portion branched vertically. Provided with piped upper and lower branch pipes, the top opening of the upper branch pipe is arranged in the vicinity of the upper limit sensor and the pump operation sensor so that water can be injected toward the upper limit sensor and the pump operation sensor. The tip opening of the lower branch pipe is arranged near the pump stop sensor and the lower limit sensor so that water can be injected toward the pump stop sensor and the lower limit sensor. Of claims 1 to 3, characterized in that it is is to provide a wastewater for liquid level control device according to any one.

  According to the first aspect of the present invention, a sensor that is provided in the sewage tank and detects the liquid level, and the pump is controlled based on the detection by the sensor to control the sewage liquid level in the sewage tank. In a sewage liquid level control device comprising a control device main body, a tip opening of a water injection pipe is disposed in the vicinity of the sensor so as to inject water toward the sensor. Provide a liquid level control device for sewage configured to continuously fill the vicinity of the sensor with water to be injected by continuously or intermittently injecting clear water, or to clean the sensor. By continuously filling the water with water to be injected, it is possible to prevent adhesion or entanglement of contaminants to the sensor, prevent malfunction of the sensor, and easily clean the sensor.

  According to a second aspect of the present invention, the sensor is stored in a bottomed cylindrical storage container installed in the sewage tank and having an open top, and the storage container is opened at the bottom of the storage container. In addition to the effect of the invention of claim 1, in addition to the effects of the invention of claim 1, it is possible to prevent intrusion of contaminants and the like into the containment vessel. , Sensor malfunction can be prevented.

  According to the invention described in claim 3, since the spray nozzle is provided at the tip opening of the water injection pipe, in addition to the effect of the invention described in claim 1 or 2, the sensor is provided by spraying the spray nozzle. By filling with water that is surely and evenly injected, it is possible to further prevent malfunction of the sensor, or to clean the sensor reliably and to prevent scum and the like from floating on the liquid surface.

  According to the invention of claim 4, the sensor includes an upper limit sensor for detecting an upper limit high liquid level in the sewage tank, a pump operation sensor for detecting a liquid level for operating the pump, and a liquid for stopping the pump. The pump stop sensor for detecting the position and the lower limit sensor for detecting the lower limit low liquid level in the sewage tank are sequentially arranged from the upper side to the lower side. The top opening of the upper branch pipe is arranged in the vicinity of the upper limit sensor and the pump operation sensor so that water can be injected toward the upper limit sensor and the pump operation sensor. The lower opening of the lower branch pipe is provided near the pump stop sensor and the lower limit sensor so that water can be injected toward the pump stop sensor and the lower limit sensor. In addition to the effects of the device according to any one of claims 1 to 3, the upper end sensor and the pump opening sensor are disposed close to the front end opening of the upper branch pipe. Can be reliably filled with the water to be poured from, or can be washed, and the pump stop sensor and the lower limit sensor are poured from the front end opening of the lower branch pipe disposed nearby. It can be surely filled with water, or can be cleaned, and the sensor can be reliably prevented from malfunctioning.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings showing examples. For convenience of explanation, the same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

  In FIG. 1A, reference numeral 21 denotes a sewage liquid level control apparatus according to the first embodiment of the present invention. The sewage liquid level control apparatus 21 is a conventional sewage liquid level control apparatus (FIG. 4). In order to inject water toward the sensor 3 in the vicinity of the sensor 3 of 1), a tip opening 23 of the water injection pipe 22 is disposed, and relatively clear water is injected from the tip opening 23 to thereby provide a sensor. The vicinity of 3 is continuously filled with water that is poured continuously or intermittently, or the sensor 3 is washed.

  The water injection pipe 22 includes upper and lower branch pipes 24 and 25 whose downstream parts are branched upward and downward. The tip opening 26 of the upper branch pipe 24 is located near the upper limit sensor 8 and the pump operation sensor 9. The top opening 27 of the lower branch pipe 25 is disposed near the pump stop sensor 10 and the lower limit sensor 11 for stopping the pump. It arrange | positions so that water can be poured toward the sensor 10 and the lower limit sensor 11. FIG.

  In addition, the sensor 3 of the sewage liquid level control device 21 of the first embodiment, that is, the upper limit sensor 8, the pump operation sensor 9, the pump stop sensor 10, and the lower limit sensor 11 are constituted by float type sensors. ing.

  The sewage liquid level control device 21 is a bottomed cylinder with an open top instead of the containment vessel (7 in FIG. 4) of the conventional sewage liquid level control device (1 in FIG. 4). A shape storage container 28 is provided.

  The storage container 28 has a cylindrical outer peripheral portion formed in a non-perforated state. As shown in FIG. 5B, the storage container 28 has one or a plurality of opening portions 30 having a predetermined size. 30 ... are opened, and are configured to communicate with the sewage tank 2 through the openings 30, 30 ....

  The sewage tank 2 is made of concrete, steel plate, resin or the like having a predetermined strength.

  Thus, in the sewage liquid level control device 21, when sewage flows into the sewage tank 2 from a pipe or the like (not shown) and the sewage is stored up to the position of the pump operation sensor 9 in the sewage tank 2, The pump operating sensor 9 senses the liquid level and sends a signal to the control device main body 6. The control device main body 6 sends a control signal to the pump 5 based on the signal from the pump operating sensor 9 to operate the pump 5. . By the operation of the pump 5, sewage is discharged out of the sewage tank 2 through the drain pipe 14.

  If the liquid level in the sewage tank 2 further rises and sewage is stored up to the upper limit sensor 8 position, the upper limit sensor 8 senses the liquid level and sends a signal to the control apparatus body 6. Based on the signal from the upper limit sensor 8, an alarm signal is sent to the alarm device 12 to activate the alarm device 12.

  Conversely, when the level of sewage in the sewage tank 2 drops to the position of the pump stop sensor 10, the pump stop sensor 10 senses that level and sends a signal to the control device main body 6. 6 sends a control signal to the pump 5 based on the signal from the pump stop sensor 10 to stop the pump 5.

  Should the liquid level in the sewage tank 2 further drop and the sewage falls to the lower limit sensor 11 position, the lower limit sensor 11 senses the liquid level and sends a signal to the control device main body 6. Based on the signal from the lower limit sensor 11, an alarm signal is sent to the alarm device 12 to activate the alarm device 12.

  Next, the water injection work in the vicinity of the sensor 3 and the cleaning work of the sensor 3 will be described. First, the valve 31 disposed upstream of the water injection pipe 22 is opened, and further the upper branch pipe 24 is connected. The valve 32 provided is opened, and relatively clear water is poured from the tip opening 26 of the upper branch pipe 24.

  For example, continuous water injection may be performed manually, or intermittent injection may be performed automatically by configuring the valves 31 and 32 to automatically open and close. When water is injected in the vicinity of the sensor 3, an appropriate amount of water is continuously injected in the vicinity of the sensor 3, or intermittent water injection is continuously performed.

  When the sensor 3 is washed, the amount of water is increased, and continuous water injection or intermittent water injection is performed for a certain time. The cleaning operation is desirably performed periodically, but may be performed when the sensors 8 to 11 are soiled, or when foreign matters are attached or entangled. It is also possible to use treated water that has been subjected to sewage treatment as water to be poured.

  The tip opening 26 is disposed in the vicinity of the upper limit sensor 8 and the pump actuation sensor 9 so that water can be injected toward the upper limit sensor 8 and the pump actuation sensor 9. By the water injection from the tip opening 26, the upper limit sensor 8 and the pump operation sensor 9 are reliably filled with the water injected or washed.

  Then, the valve 32 provided in the upper branch pipe 24 is closed, the valve 33 provided in the lower branch pipe 25 is opened, and water is injected from the front end opening 27 of the lower branch pipe 25.

  Water injection in this case may be performed manually manually or intermittently.

  The front end opening 27 is disposed in the vicinity of the pump stop sensor 10 and the lower limit sensor 11 so that water can be injected toward the pump stop sensor 10 and the lower limit sensor 11. By pumping water from the tip opening 27, the pump stop sensor 10 and the lower limit sensor 11 are reliably filled with water or washed.

  Thus, the sewage liquid level control device 21 is provided with the tip opening 23 of the water injection pipe 22 in the vicinity of the sensor 3 so as to inject water toward the sensor 3, and is relatively clear from the tip opening 23. By injecting water, the vicinity of the sensor 3 is continuously filled with the water to be injected, so that foreign matter does not approach the sensor 3 to prevent the foreign matter from adhering to or entangled with the sensor 3. In addition, the sensor 3 can be washed to remove adhesion and entanglement of contaminants in the sewage, prevent the sensor from malfunctioning and clean the sensor 3 easily. Can be done. In addition, since the malfunction of the sensor can be prevented, the sewage liquid level can be prevented from being lowered, and the pump 5 can be prevented from being entangled with foreign matters and the like, thereby preventing the pump from being overheated.

  The sensor 3 is stored in the storage container 28, and the storage container 28 communicates with the sewage tank 2 through one or a plurality of opening portions 30, 30... Opened in the bottom 29 of the storage container 28. Therefore, it is possible to prevent foreign matter from entering the storage container 28 and prevent malfunction of the sensor 3.

  Further, the water injection pipe 22 includes upper and lower branch pipes 24 and 25 whose downstream parts are branched up and down, and the tip opening 26 of the upper branch pipe 24 is located near the upper limit sensor 8 and the pump operation sensor 9. The top opening 27 of the lower branch pipe 25 is disposed near the pump stop sensor 10 and the lower limit sensor 11 for stopping the pump. Since the sensor 10 and the lower limit sensor 11 are arranged so as to be able to inject water, the upper limit sensor 8 and the pump operation sensor 9 are disposed from the front end opening 26 of the upper branch pipe 24 disposed nearby. It can be reliably filled with spouted water injection or it can be washed. Furthermore, the pump stop sensor 10 and the lower limit sensor 11 can be reliably filled with water injected from the front end opening 27 of the lower branch pipe 25 disposed nearby, or can be washed.

  In FIG. 2, 41 is a sewage liquid level control device according to the second embodiment of the present invention, and the sewage liquid level control device 41 is the sewage liquid level control device according to the first embodiment of the present invention. Spray nozzles 42 and 43 are provided at the tip openings 26 and 27 of the upper and lower branch pipes 24 and 25 (21 in FIG. 1).

  Thus, in the sewage liquid level control device 41, the water in the upper and lower branch pipes 24, 25 is poured into the spray form from the spray nozzles 42, 43, respectively. The other liquid level control and cleaning operations of the sewage liquid level control device 41 are the same as the description of the sewage liquid level control device 21 and will not be described.

  Thus, according to the sewage liquid level control device 41, in addition to the effect of the sewage liquid level control device 21 of the first embodiment, the spraying of the spray nozzles 42 and 43 ensures that the sensor 3 is evenly injected with water. It can be filled with water, or it can be cleaned, and the malfunction of the sensor 3 can be further prevented, and scum and the like can be prevented from floating on the liquid surface.

  In FIG. 3, 51 is the sewage liquid level control device of the third embodiment of the present invention, and the sewage liquid level control device 51 is the sewage liquid level control device (21 in FIG. 1). In place of the float type sensor (3 in FIG. 1, that is, the upper limit sensor 8, the pump operation sensor 9, the pump stop sensor 10 and the lower limit sensor 11), the electrode bar type sensor 52, that is, the electrode bar type An upper limit sensor 53, a pump operation sensor 54, a pump stop sensor 55, and a lower limit sensor 56 are provided.

  Thus, in the liquid level control device 51 for sewage, the electrode bar sensor 52 detects the liquid level with the electrode bar. Since the other liquid level control and cleaning operations of the sewage liquid level control device 51 are the same as the description of the sewage liquid level control device 21, they are omitted.

  In the sewage liquid level control device 51, the same effect as that of the sewage liquid level control device 21 can be expected, and an accurate liquid level can be detected by the electrode rod. Conventionally, when an electrode rod type sensor is used, there is a possibility that the electrode rod is short-circuited due to entanglement of contaminants and the like, which may cause malfunction as a sensor. In the sewage liquid level control device 51, Fills the vicinity of the sensor 52 with water that has been injected to prevent adhesion or entanglement of foreign substances, or by removing foreign substances by washing to prevent short-circuiting of the electrode rod and prevention of sensor malfunction. can do.

(A) It is sectional drawing which shows roughly the liquid level control apparatus for sewage of 1st Example by this invention. (B) It is the sectional view on the AA line of previous figure (a). It is sectional drawing which shows roughly the liquid level control apparatus for sewage of 2nd Example by this invention. It is sectional drawing which shows schematically the liquid level control apparatus for sewage of 3rd Example by this invention. It is sectional drawing which shows schematically the liquid level control apparatus for sewage of a prior art example.

Explanation of symbols

2 Sewage tank 3 Sensor 5 Pump 6 Control device body 8, 53 Upper limit sensor 9, 54 Pump operation sensor 10, 55 Pump stop sensor 11, 56 Lower limit sensor 21, 41, 51 Sewage level control device 22 Water injection pipe 23 , 26, 27 Front opening 24 Upper branch pipe 25 Lower branch pipe 28 Containment vessel 29 Bottom 30 Opening 42, 43 Spray nozzle

Claims (4)

  Liquid level control for sewage provided with a sensor for detecting a liquid level provided in the sewage tank, and a control device main body for controlling the liquid level of the sewage in the sewage tank based on detection by the sensor. In the apparatus, in order to inject water toward the sensor in the vicinity of the sensor, a tip opening portion of the water injection pipe is disposed, and relatively clear water is continuously or intermittently injected from the tip opening portion, A liquid level control apparatus for sewage characterized in that the vicinity of the sensor is continuously filled with water to be poured or the sensor is washed.   The sensor is stored in a bottomed cylindrical storage container installed in the sewage tank, and the storage container is connected to one or a plurality of openings formed in the bottom of the storage container. The sewage liquid level control device according to claim 1, wherein the sewage water level control device is configured to communicate with the sewage tank.   The liquid level control apparatus for sewage according to claim 1 or 2, wherein a spray nozzle is provided at a front end opening of the water injection pipe. The sensor includes an upper limit sensor for detecting an upper limit high liquid level in the sewage tank, a pump operation sensor for detecting a liquid level for operating the pump, a pump stop sensor for detecting a liquid level for stopping the pump, The lower limit sensor for detecting the lower limit low liquid level in the sewage tank is arranged sequentially from the upper side to the lower side, while the water injection pipe is an upper and lower branch pipe whose downstream part is vertically branched. The top opening of the upper branch pipe is arranged in the vicinity of the upper limit sensor and the pump operation sensor so that water can be poured toward the upper limit sensor and the pump operation sensor, and the front end opening of the lower branch pipe Is arranged in the vicinity of the pump stop sensor and the lower limit sensor so that water can be injected toward the pump stop sensor and the lower limit sensor. That wastewater for liquid level control device according to any one of claims 1 to 3.

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