JP3106924U - Automatic water supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water drainage in a suction pipe by automatically replenishing water from a replenishing water tank without power when the foot valve does not completely close when the pump is not used and water in the suction pipe flows backward and water runs out. Another object is to warn of a foot valve malfunction through fluctuations in the level of the replenishing water tank caused by replenishing water into the suction pipe.
A replenishment water tank 41 is installed at a position higher than a pump 1 to which a suction pipe 11 having a foot valve 13 attached to a lower end and a discharge pipe 12 are connected, and the discharge pipe 12 and the replenishment water tank 41 are connected to a replenishment pipe 42. The check valve 43 is attached to the supply pipe 42, the high-pressure-side delivery pipe 3 and the supply water tank 41 are connected by the supply pipe 44, the electromagnetic valve 45 is attached to the supply pipe 44, and the interior of the supply water tank 41 A supply stop sensor 45a for detecting a predetermined high water level and closing the electromagnetic valve 45 and a supply start sensor 45b for detecting a predetermined low water level and opening the electromagnetic valve 45 are attached.
[Selection] Figure 1

Description

  In this device, the foot valve attached to the lower end of the suction pipe of the pump does not completely close when the pump is not in use, causing a water drainage in the suction pipe. The present invention relates to an automatic replenishing water device that prevents a foot valve and warns of a foot valve malfunction.

  In order to suck up and send the water in the water storage tank by a pump, the suction pipe of the pump is attached downward from above the tank, and the lower side of the suction pipe is submerged below the water surface in the tank. A foot valve that prevents backflow of water is provided at the lower end of the suction pipe of the pump that is submerged under the surface of the water. This foot valve prevents the water in the suction pipe from flowing back into the tank, and the suction of the pump. The water in the tube is kept from running out.

  However, due to foreign matter caught in the foot valve provided at the lower end of the pump suction pipe, wear, damage, or deformation of the foot valve, the foot valve does not close completely when the pump is not in use, causing water in the suction pipe to flow backward. As a result, there was a problem that the pump could run idle during start-up and stop sucking up water.

  In view of the above-mentioned problems, the present invention was devised to solve the problems. The purpose of the invention is to prevent the foot valve from closing completely when the pump is not used, and to prevent the water in the suction pipe from flowing. In the case of running out of water due to reverse flow, water is automatically replenished from the make-up tank without power to prevent water from running in the suction pipe, and the foot valve malfunctions due to fluctuations in the level of the make-up tank due to water supply into the suction pipe. An object of the present invention is to provide an automatic replenishing water device capable of alarming.

  In order to achieve the above object, the invention of claim 1 is characterized in that a replenishing water tank is installed at a position higher than a pump in which a suction pipe having a foot valve attached to a lower end and a discharge pipe are connected. Are connected to the replenishment pipe, and a check valve is attached to the replenishment pipe to prevent backflow to the replenishment water tank. When reversing from the foot valve when the pump is not in use, the suction pipe uses the water level difference to supply and discharge pipes. Water is replenished from the replenishing water tank through the discharge pipe and the supply water tank of the discharge pipe connected to the discharge pipe is connected to the replenishing water tank with a supply pipe, and a solenoid valve for opening and closing the supply pipe is attached to the supply pipe A supply stop sensor that detects the predetermined high water level and closes the solenoid valve and a supply start sensor that detects the predetermined low water level and opens the solenoid valve are installed inside the makeup water tank. Feeding on the side where the water pressure is higher than the tank Those consisting of means for controlling the supply of water from the pipe.

  Further, in the invention of claim 2, a replenishing water tank is installed at a position higher than a pump in which a suction pipe having a foot valve attached to a lower end and a discharge pipe are connected, and the discharge pipe and the replenishing water tank are connected by a replenishment pipe. A check valve that prevents backflow to the replenishing water tank is attached to the replenishing pipe, and water is replenished from the replenishing water tank through the replenishing pipe and discharge pipe using the water level difference in the suction pipe during backflow from the foot valve when the pump is not used At the same time, the supply pipe is connected to the supply water tank with a higher water pressure than the supply pipe of the delivery pipe connected to the discharge pipe, and an electromagnetic valve for opening and closing the supply pipe is attached to the supply pipe. A supply stop sensor that detects the high water level and closes the solenoid valve and a supply start sensor that detects the predetermined low water level and opens the solenoid valve are installed, and the supply water tank has a higher water pressure than the supply water tank through the supply pipe. Control the water supply from the delivery pipe Rutotomoni, inside attach the low water side variation detecting sensor for detecting the water level fluctuates low water side of the replenishing water tank is made from means provided with a warning device to alert the detection of the low water side variation detecting sensor.

As is apparent from the above description, according to the automatic replenishing water device according to claim 1 and claim 2, when the pump is not in use, the foot valve is not completely closed, and the water in the suction pipe flows back and drains. If this happens, the water level difference from the replenishing water tank will be automatically replenished without power to prevent the suction pipe from running out of water. It has a very practical and beneficial effect.
In addition, according to the automatic replenishing water device according to the second aspect of the present invention, it is possible to warn of a foot valve malfunction through fluctuations in the level of the replenishing water tank caused by replenishing water into the suction pipe.

Hereinafter, the present invention will be described more specifically based on the best mode for carrying out the invention described in the drawings.
Here, FIG. 1 is an overall configuration diagram, and FIG. 2 is an enlarged configuration diagram of a makeup water tank.

  In the figure, a pump 1 is a device for sucking up water in a water storage tank 2 through a suction pipe 11 and sending it from a discharge pipe 12 to a delivery pipe 3. Two pumps 1 are installed above the water storage tank 2. Each pump 1 is provided with a motor for driving the pump 1. The motor is attached downward, for example, above the pump 1. The water in the water storage tank 2 sent to the delivery pipe 3 from the discharge pipe 12 of the pump 1 is sent to the outside through the delivery pipe 3.

  A suction pipe 11 and a discharge pipe 12 are connected to the pump 1. The suction pipe 11 is a part of a passage for sucking up water in the water storage tank 2, and the discharge pipe 12 is a part of a passage for discharging the water sucked up by the suction pipe 11 to the delivery pipe 3. The suction pipe 11 and the discharge pipe 12 communicate with each other with the pump 1 interposed therebetween.

  The suction pipe 11 whose one end is connected to the pump 1 is disposed so that the other end is directed downward from the horizontal direction toward the lower storage tank 2. The suction pipe 11 is disposed so that the lower side, which is the other side of the suction pipe 11, is submerged below the water surface of the water storage tank 2. 13 is attached.

  The foot valve 13 attached to the lower end of the suction pipe 11 opens to the suction side of the suction pipe 11 and closes to the side that flows backward from the inside of the suction pipe 11 into the water storage tank 2. At the time, that is, when the pump 1 is stopped, the water inside the suction pipe 11 is prevented from flowing back into the water storage tank 2 to prevent the suction pipe 11 from running out of water. However, when the pump 1 is not in use due to foreign matter caught in the foot valve 13 or the foot valve 13 being worn, damaged, or deformed, the foot valve 13 is not completely closed, and the water in the suction pipe 11 flows back and drains. May occur.

  The discharge pipe 12 having one end connected to each pump 1 is disposed at the other end upward from the horizontal direction toward the upper delivery pipe 3. A check valve 31 is connected to the upper end of the discharge pipe 12 that faces upward on the other end side to prevent backflow toward the discharge pipe 12. The check valve 31 is connected to the lower end of the delivery pipe 3 disposed upward via the opening / closing valve 32, and the discharge pipe 12 is connected to the delivery pipe 3 via the check valve 31 and the opening / closing valve 32. Has been.

  One of the upwardly arranged delivery pipes 3 has its upper end side changed in the horizontal direction, and is coupled to the upper end of another upward delivery pipe 3 in the middle, and is coupled to one delivery pipe 3 to the outside. It is extended. The delivery pipe 3 serves as a passage for delivering the water in the water storage tank 2 to the outside, but a part of the water in the delivery pipe 3 is supplied to the makeup water tank 41 of the automatic makeup water device 4.

  The automatic replenishing water device 4 prevents water breakage in the suction pipe 11 caused by the foot valve 13 not being completely closed due to a malfunction when the pump 1 is not in use. This is a mechanism for automatically replenishing the suction pipe 11 by using and eliminating running out of water. Further, the automatic replenishing water device 4 is provided with an alarm device 5 that warns of the malfunction of the foot valve 13 by replenishing water into the suction pipe 11 when the foot valve 13 is malfunctioning.

  The automatic replenishing water device 4 includes a replenishing water tank 41 installed at a position higher than each pump 1, a replenishing pipe 42 connecting the discharge pipe 12 and the replenishing water tank 41, a check valve 43 attached to the replenishing pipe 42, and a replenishing water tank 41, a supply pipe 44 for connecting the delivery pipe 3 with a higher water pressure to the supply water tank 41, a solenoid valve 45 attached to the supply pipe 44, a supply stop sensor 45a attached to the inside of the supply water tank 41, and a supply start sensor. 45b and the like.

  The replenishing water tank 41 automatically replenishes the suction pipe 11 by utilizing the water level difference when the foot valve 13 is not completely closed due to a malfunction when the pump 1 is not used, and the suction pipe 11 runs out of water. It is a water tank that stores the water to be used, and is installed at a position higher than each pump 1. By installing the replenishing water tank 41 at a position higher than each pump 1, it is possible to use the water level difference due to the height difference without using a separate driving pump or the like for each pump 1 at a lower position. Water can be automatically supplied into the suction pipe 11 by power.

  The supply pipe 42 is a passage for supplying water from the high-level supply water tank 41 to each pump 1 at the low position, and is disposed between the supply water tank 41 and each pump 1. One end of the replenishing pipe 42 is connected to the bottom surface of the replenishing water tank 41, and the other end side of the replenishing water tank 41 is branched into two in the middle, and the other end is connected to the side surface of the upward portion of the discharge pipe 12 of each pump 1. Has been.

  A check valve 43 for preventing a reverse flow from the discharge pipe 12 side to the supply water tank 41 side is attached to the supply pipe 42 disposed between the supply water tank 41 and the discharge pipe 12 of the pump 1. . The check valve 43 is attached so as to allow water to flow from the replenishing water tank 41 side to the discharge pipe 12 side and to block the flow of water from the discharge pipe 12 side to the replenishing water tank 41 side. In the best mode, the check valve 43 is attached in the middle of the supply pipe 42 at a position higher than the pump 1 near the supply water tank 41.

  A manual on-off valve 42 a is attached in the vicinity of the check valve 43 to the supply pipe 42 on the downstream side of the attachment position of the check valve 43. Further, a manual on-off valve 42b is attached to the other end portion of the supply pipe 42 connected to the discharge pipe 12 of each pump 1. For example, ball valves are used as the on-off valves 42a and 42b.

  The replenishment water tank 41 is replenished with a part of the water in the delivery pipe 3 on the side where the water pressure is higher than that of the replenishment water tank 41. For this reason, the makeup water tank 41 is installed at a position higher than each pump 1 and, for example, below the delivery pipe 3 coupled to the one. Since the water pressure in the delivery pipe 3 depends on the water feed pressure from the pump 1, the water pressure in the delivery pipe 3 at a position lower than the make-up water tank 41 may be higher than the water pressure in the make-up water tank 41 at a position higher than this. Even if the makeup water tank 41 is installed above the delivery pipe 3 having a high water pressure, it is possible to supply water without power from the delivery pipe 3 at a lower position into the makeup water tank 41 at a higher position due to a water pressure difference.

  The supply pipe 44 is a passage for supplying water from the delivery pipe 3 on the higher water pressure side to the makeup water tank 41 having a lower water pressure, and is disposed between the delivery pipe 3 and the makeup water tank 41. The water pressure in the delivery pipe 3 is higher than the water pressure in the supply water tank 41 at a higher position than the supply water tank 41 because the water pressure in the delivery pipe 3 is higher than the water pressure in the supply water tank 41 at a lower position than the supply water tank 41. Although it can be supplied from the delivery pipe 3 side toward the makeup water tank 41 at a position higher than this, in the best mode, the delivery pipe 3 at a position higher than the makeup water tank 41 is directed toward the makeup water tank 41 lower than this. Thus, water is supplied through the supply pipe 44. One end of the supply pipe 44 at a high position is connected to the lower surface of the upper delivery pipe 3, and the other end on the lower position side of the supply pipe 44 is extended from the bottom surface of the makeup water tank 41 into the water tank 41. . The other end side of the supply pipe 44 extending in the makeup water tank 41 extends upward, and then bends and extends horizontally slightly from there, and then the other end faces downward.

  An electromagnetic valve 45 for controlling ON / OFF of supply is attached in the middle of a supply pipe 44 disposed between the delivery pipe 3 and the replenishing water tank 41. The electromagnetic valve 45 closes the supply pipe 44 and stops the supply of water from the delivery pipe 3 when the water level in the make-up water tank 41 rises due to supply and reaches a predetermined high water position, and the water level in the make-up water tank 41 is reduced by refilling. When it descends and reaches a predetermined low water position, the supply pipe 44 is opened and water supply from the delivery pipe 3 is started. In the best mode, the electromagnetic valve 45 is attached in the middle of the supply pipe 44 at a low position near the makeup water tank 41.

  A supply stop sensor 45 a and a supply start sensor 45 b for controlling the opening and closing of the electromagnetic valve 45 are respectively attached to the makeup water tank 41. The supply stop sensor 45a detects that the water level of the makeup water tank 41 has risen due to the supply and reaches a predetermined high water position, and closes the electromagnetic valve 45. Further, the supply start sensor 45b detects that the water level of the replenishing water tank 41 is lowered by replenishment and reaches a predetermined low water position, and opens the electromagnetic valve 45.

  For example, a short electrode rod and a long electrode rod are used for the supply stop sensor 45a and the supply start sensor 45b. A supply stop sensor 45a made of, for example, a short electrode rod and a supply start sensor 45b made of, for example, a long electrode rod are attached downward from the electrode holder 6 attached to the upper surface side of the replenishing water tank 41 toward the inside of the water tank. A long earth 61 is attached downward from the electrode holder 6 toward the vicinity of the bottom surface in the makeup water tank 41.

  The supply stop sensor 45a detects when the lower end of the short electrode rod rises in water level due to water supply and comes into contact with the water in the makeup water tank 41, and closes the electromagnetic valve 45 in the water supply to stop water supply. The supply start sensor 45b detects when the lower end of the long electrode rod is lowered in water level due to replenishment and is not in contact with the water in the replenishment water tank 41, and opens the electromagnetic valve 45 to start water supply.

  A manual on-off valve 44 a is attached to one end portion of the supply pipe 44 connected to the delivery pipe 3. An on-off valve 44 b is attached near the electromagnetic valve 45 in the supply pipe 44 on the upstream side of the attachment position of the electromagnetic valve 45. For example, ball valves are used as the on-off valves 44a and 44b. Further, a pressure reducing valve 44c is provided in the supply pipe 44 between the on-off valve 44b and the electromagnetic valve 45. The pressure reducing valve 44c functions to reduce the water pressure in the supply pipe 44 downstream of the pressure reducing valve 44c to a predetermined water pressure.

  An overflow 41a is provided on the side surface above the supply stop sensor 45a of the make-up water tank 41, and when the water is supplied to the make-up water tank 41 more than necessary, it is discharged from the overflow 41a. Further, a drain pipe 41b is attached to the bottom surface of the makeup water tank 41 downward, and a manual opening / closing valve 41c is attached to the drain pipe 41b.

  The alarm device 5 detects when water is replenished from the makeup water tank 41 to the pump 1 side due to a malfunction of the foot valve 13 when the pump 1 is not used, and the water level of the makeup water tank 41 changes to the low water level side. For example, an alarm lamp is lit or blinks to alert a worker. A low water level fluctuation detection sensor 51 for detecting a water level that fluctuates toward the low water level is attached inside the makeup water tank 41.

  For example, an electrode rod is used for the low water level fluctuation detection sensor 51. A low water level fluctuation detection sensor 51 made of, for example, an electrode rod is attached downward from the electrode holder 6 attached to the upper surface side of the replenishing water tank 41 toward the inside of the water tank. The electrode rod of the low water level fluctuation detection sensor 51 is the intermediate length between the short electrode rod of the supply stop sensor 45a and the long electrode rod of the supply start sensor 45b. The low water level fluctuation detection sensor 51 detects this when the lower end of the electrode rod is lowered due to replenishment and becomes in a non-contact state with the water in the replenishing water tank 41, and turns on or blinks an alarm lamp to cause a malfunction of the foot valve 13. Alarm.

Next, the operation based on the configuration of the best mode for carrying out the above-described device will be described below.
After the water absorption from the water storage tank 2 by each pump 1 is finished and the pump 1 is stopped, foreign matter is caught in the foot valve 13 attached to the lower end of the suction pipe 11, or the foot valve 13 is worn, damaged or deformed. When the foot valve 13 is not completely closed, the water in the suction pipe 11 flows back into the water storage tank 2 from the foot valve 13 which is not completely closed.

  When the water in the suction pipe 11 flows backward, the water pressure of the discharge pipe 12 communicating with the suction pipe 11 and the pump 1 is reduced. When the water pressure in the discharge pipe 12 decreases, the make-up water tank 41 communicating with the discharge pipe 12 through the make-up pipe 42 is powered by the water pressure difference due to the height difference, and the water in the make-up water tank 41 is directed into the discharge pipe 12 through the make-up pipe 42. Down and replenish continuously.

  When the water in the replenishing water tank 41 is replenished into the discharge pipe 12, the suction pipe 11 communicating with the discharge pipe 12 is filled with the same amount of water that flows back into the water storage tank 2 through the discharge pipe 12. 41 is continuously replenished. For this reason, even if the water inside the suction pipe 11 flows back into the water storage tank 2 due to a failure of the foot valve 13, the suction pipe 11 does not run out of water. It is possible to prevent 1 from idling.

  Further, when the water level in the replenishing water tank 41 is lowered due to replenishment to the suction pipe 11 side, the low water level fluctuation detection sensor 51 detects the water level fluctuation due to the water level drop, and for example, lights or blinks a warning light to the worker. An alarm is given to the malfunction of the valve 13. The operator can know the malfunction of the foot valve 13 by watching the lighting or blinking of the warning light.

  When the water level in the replenishing water tank 41 decreases due to replenishment to the suction pipe 11 side and reaches a predetermined low water level position, the supply start sensor 45b detects this and opens the electromagnetic valve 45 that closes the supply pipe 44. To start water supply. When the electromagnetic valve 45 is opened, the water in the delivery pipe 3 above the make-up water tank 41 is powered by the fact that the water pressure in the feed pipe 3 is higher than the water pressure in the make-up water tank 41, and passes through the supply pipe 44. It flows into the makeup water tank 41.

  When water is supplied into the make-up water tank 41 through the supply pipe 44, the water level in the make-up water tank 41 rises, and when it reaches a predetermined high water level position, the supply stop sensor 45a detects this, The open solenoid valve 45 is closed to stop water supply. Thereby, it can prevent that the water in the replenishing water tank 41 will be in the state of insufficient replenishment.

  Further, when the water level in the replenishing water tank 41 decreases due to replenishment to the suction pipe 11 side, the water level fluctuation due to the water level drop is detected by the low water level fluctuation detection sensor 51. An alarm is given for malfunction of the valve 13. The operator can know the malfunction of the foot valve 13 when the pump 1 is not used by observing the lighting or blinking of the warning light.

  The present invention is not limited to the best mode for carrying out the above-described invention, and various modifications can be made without departing from the spirit of the present invention. In the best mode for carrying out the present invention, the case where two pumps 1 are installed has been described. However, the present invention is not limited to this, and one pump 1 or three or more pumps 1 may be installed. Good.

  If it is a pump which has a suction pipe provided with a foot valve at the lower end, it is applicable also to the use which sucks up liquids other than water.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole block diagram which shows the best form for implementing this device. It is an expanded block diagram of the replenishment water tank which shows the best form for implementing this device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pump 11 Suction pipe 12 Discharge pipe 13 Foot valve 2 Water storage tank 3 Delivery pipe 31 Check valve 32 Open / close valve 4 Automatic replenishment water device 41 Replenishment water tank 41a Overflow 41b Drain pipe 41c Open / close valve 42 Refill pipe 42a Open / close valve 42b Open / close valve 43 Check valve 44 Supply pipe 44a Open / close valve 44b Open / close valve 44c Pressure reducing valve 45 Solenoid valve 45a Supply stop sensor 45b Supply start sensor 5 Alarm device 51 Low water level fluctuation detection sensor 6 Electrode holder 61 Earth

Claims (2)

A replenishment water tank is installed at a position higher than the pump where the suction pipe with the foot valve attached to the lower end and the discharge pipe are connected, and the discharge pipe and the replenishment water tank are connected with the replenishment pipe. Attach a check valve to prevent backflow, replenish water from the replenishment tank through the replenishment pipe and discharge pipe using the water level difference in the suction pipe during backflow from the foot valve when the pump is not in use, and connect to the discharge pipe Connect the supply water tank to the supply water tank with a higher water pressure than the supply water tank, attach an electromagnetic valve that opens and closes the supply pipe to the supply pipe, and detect a predetermined high water level inside the supply water tank. A supply stop sensor that closes the water supply and a supply start sensor that detects the predetermined low water level and opens the solenoid valve are attached, and the supply of water from the supply pipe on the side where the water pressure is higher than the supply water tank is controlled through the supply pipe. Automatic characterized by Water supply apparatus. A replenishment water tank is installed at a position higher than the pump where the suction pipe with the foot valve attached to the lower end and the discharge pipe are connected, and the discharge pipe and the replenishment water tank are connected with the replenishment pipe. Attach a check valve to prevent backflow, replenish water from the replenishment tank through the replenishment pipe and discharge pipe using the water level difference in the suction pipe during backflow from the foot valve when the pump is not in use, and connect to the discharge pipe Connect the supply water tank to the supply water tank with a higher water pressure than the supply water tank, attach an electromagnetic valve that opens and closes the supply pipe to the supply pipe, and detect a predetermined high water level inside the supply water tank. A supply stop sensor that closes the water supply and a supply start sensor that detects the predetermined low water level and opens the solenoid valve are attached, and the supply of water from the supply pipe on the side where the water pressure is higher than the supply water tank is controlled through the supply pipe. Along with the inside of the makeup tank Low water side mounting the low water side variation detecting sensor for detecting the water level fluctuates, the automatic refill water system, characterized in that a warning device for warning by detecting the low water side variation detecting sensor.

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