JP2012050925A - Device for washing inside of pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe inside-washing device in which the effect of removing adhered materials inside a pipe or washing is enhanced by forcibly circulating a washing water or air-mixed washing water to the pipe to be washed.SOLUTION: The pipe inside-washing device comprises: a washing circuit part 5 in which a switch valve for introducing the washing water, a filter and a first solenoid valve are interposed in turn into a suction line 6 connecting to a pipe (p) to be washed, a venturi nozzle 15 and a water-feeding pump 25 are connected in parallel between a discharge line 12 connecting to the pipe (p) and the suction line, an air introduction pipe is connected to a second solenoid valve provided to communicate inside the venturi nozzle, and a check valve and a manual shut-off valve are interposed in turn into the introduction pipe, and a relief valve for adjusting the discharge pressure of the water-feeding pump is interposed into a relief circuit branched from the discharge line to be connected to the suction pipe of the water-feeding pump; and a control part 30 for automatically controlling the switching operations of the first and second solenoid valves on the basis of a specific washing pattern selected from multiple patterns by an input unit 35.

Description

  The present invention relates to an internal cleaning device for piping used for removing deposits such as scales on the inner wall of a piping of a water heater or the like and performing a cleaning process.

  In Patent Document 1, a compressed gas supply device is connected to one port of a bifurcated pipe connected to a fitting attached to a water tap of a water supply pipe via a check valve, and the other port of the bifurcated pipe is connected. A control means for connecting a discharge valve to the compressed gas supply device and sequentially connecting a compressor, an air tank, a pressure regulating valve, and a solenoid valve connected to the check valve, and opening and closing the solenoid valve in a predetermined pattern There is disclosed an internal cleaning device for a water supply pipe that removes scale adhered to the pipe by intermittently ejecting compressed air into the water supply pipe subjected to water pressure.

  In the above cleaning device, it is said that the scale is removed by the fine particle bubbles of compressed air, but it is not clear whether the fine particle bubbles reach the inner part of the pipe from the water faucet, probably only near the water faucet. It seems that processing is not possible.

  In Patent Document 2, an electromagnetic valve and a compressor are interposed in a pipe line connected to a hose connected to a faucet, and the compressed air of the compressor is attached to the pipe by supplying water into the pipe in a state where water is supplied. A pipe cleaning apparatus for removing the scale that has been removed is disclosed.

  Even in the above-described cleaning device, as in the cleaning device of Patent Document 1, it is not clear whether or not the compressed air reaches the depth of the pipe from the faucet in a state where it is mixed with water. It is not clear if it can be removed. In addition, it is described that the compressed air sent into the pipe is discharged from another faucet together with the removed deposit, but the deposit accumulates in the narrow valve passage of the faucet and opens and closes the faucet. There are concerns about problems such as problems.

JP 2003-88822 A JP 2004-105885 A

  An object of the present invention is to provide an internal cleaning device for a pipe, in which cleaning water or cleaning water mixed with bubbles is forcibly circulated in a pipe to be cleaned, thereby removing deposits in the pipe and improving the cleaning effect. There is.

In order to achieve the above object, the invention described in claim 1 includes a switching valve for introducing cleaning water stored in a tank into a suction pipe connected to an outlet of a pipe to be cleaned. The venturi nozzle and the water supply pump are connected in parallel between the discharge pipe connected to the inlet of the pipe to be cleaned and the suction pipe. An air introduction pipe for introducing compressed air supplied from the outside is connected to the second solenoid valve provided so as to communicate with the passage in the nozzle, and a check valve and a manual open / close valve are sequentially connected to the air introduction pipe. A cleaning circuit unit that includes a relief valve that adjusts the discharge pressure of the water supply pump to a relief circuit that is branched from the discharge pipe and connected to the suction pipe of the water supply pump;
A control unit for automatically controlling the opening and closing operations of the first electromagnetic valve and the second electromagnetic valve based on a specific cleaning pattern selected by the input means from a plurality of preset cleaning patterns is provided in the main body case,
In the closed circuit consisting of the pipe to be cleaned and the suction pipe and the discharge pipe, the cleaning water mixed with the cleaning water or the air introduced from the air introduction pipe is circulated in the pipe to be cleaned. It is characterized by removing deposits and cleaning.

  In order to achieve the same object, the invention described in claim 2 is the pipe internal cleaning device according to claim 1, wherein the auxiliary air introduction pipe is provided between the check valve of the air introduction pipe and the manual on-off valve. And a sub manual on-off valve is interposed in the sub air introduction pipe.

  When compressed air cannot be obtained from a compressor, etc., the air is taken in from the auxiliary air introduction pipe using the negative pressure action caused by the operation of the water supply pump, and the taken-in air is mixed with the wash water via the venturi nozzle Thus, by forcibly circulating the inside of the closed circuit including the pipe to be cleaned, the suction pipe, and the discharge pipe, it is possible to efficiently remove and clean the deposits in the pipe to be cleaned.

  In order to achieve the same object, the invention described in claim 3 is the pipe internal cleaning device according to claim 1 or 2, wherein compressed air is supplied to the air introduction pipe by a compressor built in the main body case. It is characterized in that it is provided.

  By adopting a configuration in which the compressor is built in the cleaning device, compressed air can always be obtained, which is excellent in convenience.

  This internal cleaning device for piping is based on the cleaning pattern selected by the input means, and the cleaning taken into the discharge pipe from the tank in the closed circuit consisting of the pipe to be cleaned, the suction pipe and the discharge pipe. By forcibly circulating cleaning water mixed with water or bubbles, it is possible to efficiently remove and clean deposits such as scales stuck in the piping to be cleaned.

  In addition, since a specific cleaning pattern can be selected from a plurality of cleaning patterns in accordance with the degree of contamination of piping such as a water heater to be cleaned, the deposits can be removed and the cleaning process can be performed, which is very convenient. In addition, since the adhering matter that is separated from the pipe to be cleaned and mixed into the cleaning water is removed by the filter, the removal process is performed smoothly.

Explanatory drawing of the internal cleaning device for piping according to the present invention Time chart for each cleaning pattern

  The best mode of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the internal cleaning device C for piping according to the present invention includes a cleaning circuit unit 5 and a control unit 30 in a main body case 1, and a schematic structure including an input means 35 on the front surface of the main body case 1 Has been. The pipe to be cleaned is a small-diameter pipe mainly used in hot water heaters, water heaters, and the like.

(Washing circuit)
As shown in FIG. 1, the cleaning circuit unit 5 is provided with a main suction pipe 6 and a discharge pipe 12. A switching valve 7 for introducing cleaning water stored in the small tank 8 into the suction pipe 6, a filter 9, and a normally open first electromagnetic valve 10 are sequentially provided in the suction pipe 6. . And the hose (a) etc. for connecting with the exit part (o) of piping (p) to be cleaned are provided at the connection port of the switching valve 7.

  The cleaning water is basically tap water, but a cleaning solution can also be used.

  A venturi nozzle 15 and a water supply pump 25 are connected in parallel between the discharge pipe 12 and the suction pipe 6. In order to introduce compressed air supplied from a compressor (c) or the like separately installed in the inlet port of the normally closed second electromagnetic valve 16 provided so as to communicate with the passage 15a in the venturi nozzle 15. One end of the air introduction pipe 17 is connected. A check valve 18 and a manual on-off valve 19 are interposed in the air introduction pipe 17 in this order. One end of a sub air introduction pipe 20 is connected between the check valve 18 and the manual opening / closing valve 19. Reference numeral 21 denotes a sub-manual open / close valve interposed on the inlet side of the other end of the sub air introduction pipe 20.

  The connecting joint 13 provided in the discharge pipe 12 is provided so that a hose (b) or the like for connecting to the inlet (i) of the pipe (p) to be cleaned can be attached.

  A relief circuit 26 is branched from the discharge pipe 12 and connected to the suction pipe 24 of the water supply pump 25. A relief valve 27 is provided in the relief circuit 26 in order to adjust the discharge pressure of the water supply pump 25.

(Control part)
The controller 30 opens the first electromagnetic valve 10 and the second electromagnetic valve 16 based on a specific cleaning pattern selected by an input means 35 having a push button or the like from a plurality of preset cleaning patterns to be described later. And the closing operation is automatically controlled.
In addition, since it is the content which belongs to a general electronic technology about a specific electronic control circuit, description is abbreviate | omitted.

  Accordingly, the cleaning water taken into the suction pipe 6 from the tank 8 or the compressed air supplied from the compressor (c) or the air taken in from the auxiliary air introduction pipe 20 is mixed in the initial preparation stage for performing the cleaning process. The washed water is circulated based on a specific washing pattern in the closed circuit composed of the pipe (p) to be washed and the suction pipe 6 and the discharge pipe 12 by the operation of the water pump 25. The pipe internal cleaning device C according to the present invention for removing and cleaning the deposits in (p) is constructed.

  Wash water containing deposits removed from the inner wall of the pipe (p) to be cleaned is filtered by the filter 9 and circulates in the closed circuit. Moreover, since the deposit | attachment isolate | separated from the washing water is stored in the filter 9, it shall be discarded suitably.

  There are three patterns as cleaning patterns in the pipe internal cleaning device C according to the present invention. Each pattern will be described based on the time chart shown in FIG. First, the water supply pump 25 is operated to maintain the discharge line 12 at a negative pressure, and thereafter, the switching valve 7 is operated to introduce the wash water stored in the tank 8 into the suction line 6. Perform the operation.

(Cleaning pattern 1)
When the cleaning pattern 1 is selected by the input means 35, the cleaning water is supplied from the suction line 6 to the discharge line 12 at a predetermined pressure through the filter 9 and the normally open first electromagnetic valve 10 by the operation of the water supply pump 25. It is done. At this time, since the first solenoid valve 10 is controlled by the control unit 30 to repeatedly close and open for 5 seconds within a predetermined time, the washing water passes through the suction pipe 6 while pulsating. To do.
Accordingly, the cleaning water circulates in the closed circuit for a predetermined time, so that the deposits in the pipe (p) to be cleaned and the cleaning process are easily performed.

  Note that the closing and opening operation time of the first electromagnetic valve 10 is not limited to the above time, and is provided to be adjustable by a timer (not shown).

(Washing pattern 2)
When the cleaning pattern 2 is selected by the input means 35, the cleaning water is supplied from the suction line 6 to the discharge line 12 at a predetermined pressure through the filter 9 and the normally open first electromagnetic valve 10 by the operation of the water supply pump 25. It is done. At the same time, the second electromagnetic valve 16 is controlled by the control unit 30 to repeatedly close and open for 1 second within a predetermined time, so that the compressed air supplied from the compressor (c) is introduced into the air. It is sent from the pipe 17 through the venturi nozzle 15 to the discharge pipe 12 while pulsating in a bubble state.
Thus, the cleaning water mixed with bubbles circulates in the closed circuit for a predetermined time, so that the deposits in the pipe (p) to be cleaned and the cleaning process are efficiently performed.

  The closing and opening operation time of the second electromagnetic valve 16 is provided so as to be adjustable by a timer (not shown).

(Washing pattern 3)
When the cleaning pattern 3 is selected by the input means 35, the cleaning water is sent at a predetermined pressure from the suction pipe 6 to the discharge pipe 12 through the filter 9 by the operation of the water supply pump 25. At this time, since the normally open first electromagnetic valve 10 is controlled to repeat the operation of closing for 5 seconds and opening for 5 seconds within a predetermined time, the washing water pulsates and the discharge pipe 6 is discharged from the suction pipe 6. 12 passes through. At the same time, the second electromagnetic valve 16 is controlled by the control unit 30 to repeatedly close and open for 1 second within a predetermined time, so that the compressed air supplied from the compressor (c) is introduced into the air. It is sent from the pipe 17 through the venturi nozzle 15 to the discharge pipe 12 while pulsating in a bubble state.
Thus, the cleaning water mixed with bubbles circulates in the closed circuit for a predetermined time, so that the deposits in the pipe (p) are removed and the cleaning process is powerfully performed.

  When the compressor (c) cannot be used and compressed air cannot be obtained, the negative pressure action caused by the operation of the water supply pump 25 can be used to take air into the venturi nozzle 15 from the auxiliary air introduction pipe 20. Because it is possible, convenience is good.

C: Internal cleaning device 5 for piping according to the present invention ... Cleaning circuit unit 6 ... Suction pipe 8 ... Tank 9 ... Filter 10 ... First solenoid valve 12 ... Discharge Pipe line 15 ... Venturi nozzle 16 ... second solenoid valve 17 ... air introduction pipe 20 ... sub-air introduction pipe 24 ... suction pipe 25 ... water pump 26 ... relief circuit 27 ... Relief valve 30 ... Control unit 35 ... Input means c ... Compressor p ... Pipe to be cleaned

Claims (3)

A switching valve for introducing cleaning water stored in the tank into the pipe, a filter, and a first solenoid valve are sequentially installed in the suction pipe connected to the outlet of the pipe to be cleaned. A venturi nozzle and a water supply pump are connected in parallel between the discharge pipe connected to the inlet of the pipe and the suction pipe, and a second solenoid valve is provided so as to communicate with the passage in the venturi nozzle. An air introduction pipe for introducing compressed air supplied from the outside, a check valve and a manual open / close valve are sequentially provided in the air introduction pipe, and the water supply pump is branched from the discharge pipe A cleaning circuit unit provided with a relief valve for adjusting the discharge pressure of the water pump to a relief circuit connected to the suction pipe;
A control unit for automatically controlling the opening and closing operations of the first electromagnetic valve and the second electromagnetic valve based on a specific cleaning pattern selected by the input means from a plurality of preset cleaning patterns is provided in the main body case,
In the closed circuit consisting of the pipe to be cleaned and the suction pipe and the discharge pipe, the cleaning water mixed with the cleaning water or the air introduced from the air introduction pipe is circulated in the pipe to be cleaned. An internal cleaning device for piping, which removes and cleans deposits.   2. The pipe according to claim 1, wherein a sub air introduction pipe is connected between a check valve and a manual on / off valve of the air introduction pipe, and a sub manual on / off valve is interposed in the sub air introduction pipe. Internal cleaning equipment.   The pipe internal cleaning device according to claim 1 or 2, wherein compressed air is supplied to the air introduction pipe by a compressor built in the main body case.

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