JP2007167767A - Fluid passage-washing method, washing device, and washing liquid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid passage-washing method which solves the problem that an abrasive precipitates and separates from a washing liquid, has an excellent washing effect, and washes a fluid passage without clogging a pipe with an abrasive even if the pipe is small in inner diameter, and to provide a device therefor. <P>SOLUTION: In the fluid passage-washing method and device 1, 10, when a fluid passage 9a having an inner diameter of at least 10 mm is washed, a washing liquid 6 is used, which is obtained by mixing a high specific gravity liquid having a specific gravity of 1.18-1.28 with an abrasive of 50-60 mesh in particle size. When a fluid passage 19a having an inner diameter of at most 10 mm is washed, a washing liquid 16 is used, which is obtained by dissolving SiO<SB>2</SB>and B<SB>2</SB>O<SB>3</SB>in warm water which passes through a laminated layer 23 of silica gel and tourmaline. Then, these washing liquids 6 and 16 are each fed into the fluid passages 9a and 19a, respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for cleaning a fluid passage such as a pipe for water supply / drainage, a pipe for steam, a pipe for pneumatic transportation, a pipe for a heat exchanger such as a boiler or a cooling device, a water channel for water cooling of a mold, a cleaning apparatus, and the like The present invention relates to a cleaning liquid, and relates to cleaning of a fluid passage that can efficiently clean the inside of a pipe using a non-polluting cleaning liquid.

Scale, rust, or dirt such as water, slime or dust adheres to the fluid passage. If these deposits adhere to the fluid passage, problems such as poor fluid flow, reduced air transportation, reduced heat exchange efficiency of the heat exchanger, and reduced mold cooling function Therefore, the work of cleaning the fluid passage is sometimes performed.
Conventionally, there has been an invention of a water supply pipe cleaning device that intermittently sends compressed air into a water supply pipe to peel off dirt and rust in the pipe (see, for example, Patent Document 1), but the air has an irregular cycle in the pipe. Moreover, there is a limit to the cleaning effect only by causing an impact of water, and there is a problem that a high cleaning effect cannot be obtained in a short time.
Further, there has been an invention of a pipe cleaning device that supplies pulsed air while circulating a diluted solution of hydrogen peroxide as a cleaning solution (see, for example, Patent Document 2). However, since hydrogen peroxide is harmful, the inside of the pipe is cleaned. After washing with, there was a problem that it had to be rinsed with a large amount of water and a problem that required a treatment for detoxifying the washing liquid.
Further, an invention of a pipe cleaning apparatus having a main tank and a sub tank at a supply port and a discharge port of a pipe, a step of flowing a cleaning liquid from the main tank to the sub tank, and a step of returning the cleaning liquid from the sub tank to the main tank is provided. However, since the invention requires two tanks, a main tank and a sub tank, there is a problem that the apparatus becomes excessive.

Furthermore, the cleaning liquid is pulsated by a diaphragm pump using either water, water to which a water-soluble abrasive is added, acidic liquid or acidic liquid to which hard abrasive particles having a particle size of 0.1 mm or more are added as a cleaning liquid. There has been an invention of a cleaning system that allows a liquid passage to pass therethrough (see, for example, Patent Document 4).
However, when simple water or water to which a water-soluble abrasive is added is used as a cleaning liquid, there is a problem that a high cleaning effect cannot be obtained in a short time. Further, since the acidic liquid is harmful, it has a problem that the inside of the tube must be rinsed with water and then rinsed with water, and a problem that requires a treatment for rendering the cleaning liquid harmless.
Therefore, although a trial and error was performed on the fluid passage cleaning method using a cleaning liquid mixed with a non-water-soluble abrasive, there was a problem that the abrasive precipitated and separated from the cleaning liquid.
Further, when a cleaning liquid in which a powder or granular abrasive is mixed is used, there is a problem that the abrasive is clogged in the pipe when the inner diameter of the pipe is small.
JP 2004-321842 A JP 2003-24892 A JP 2000-126707 A JP 7-275822 A

The present invention has been made to solve the above-described problems, and the object of the present invention is to provide an invention for a water supply pipe cleaning device that intermittently sends compressed air into a water supply pipe to remove dirt and rust in the pipe. The cleaning system has a limited cleaning effect and has a high degree of cleaning within a short period of time. The cleaning system has a cleaning effect that uses water or water with a water-soluble abrasive added as a cleaning liquid and pulsates the cleaning liquid with a diaphragm pump and passes through the liquid passage. It is an object of the present invention to provide a fluid passage cleaning method and a cleaning device that can eliminate a problem in which an effect cannot be obtained and can obtain a high cleaning effect in a short time.
Also, an invention of a pipe cleaning apparatus that supplies pulsed air while circulating a diluted solution of hydrogen peroxide as a cleaning liquid, and an invention of a cleaning system that uses an acidic liquid as a cleaning liquid and pulsates the cleaning liquid with a diaphragm pump while passing through the liquid passage The problem of having to rinse and wash with a large amount of water after washing the inside of the tube and the problem of requiring the treatment to make the washing liquid harmless is eliminated, and the washing liquid can be discarded as it is with simple rinsing. It is an object to provide a cleaning method and a cleaning device for a fluid passage.
Also, an invention of a pipe cleaning apparatus comprising a main tank and a sub tank at a supply port and a discharge port of a pipe, a step of flowing a cleaning liquid from the main tank to the sub tank, and a step of returning the cleaning liquid from the sub tank to the main tank. It is an object of the present invention to provide a cleaning method and a cleaning apparatus that eliminates the problem that the apparatus is excessive and that allows the fluid passage to be cleaned with a simple and small apparatus.
Further, the present invention provides a fluid passage cleaning method and a cleaning device having the highest cleaning effect by using a cleaning liquid suitable for cleaning a fluid passage without causing a problem that an abrasive is precipitated and separated from the cleaning liquid. It is in.
Furthermore, the present invention provides a fluid passage cleaning method and a cleaning device having a high cleaning effect by using a cleaning liquid that can clean the fluid passage without clogging the abrasive in the pipe even when the inner diameter of the pipe is small. It is in.

When cleaning a fluid passage having an inner diameter of 10 mm or more, a cleaning liquid in which abrasive particles having a particle size of 50 to 60 mesh are mixed in an aqueous solution having a specific gravity of 1.18 to 1.28 (hereinafter simply referred to as “high specific gravity liquid”). Is supplied to the fluid passage, the inside of the pipe of the fluid passage is cleaned with the cleaning liquid, and the cleaning method and the cleaning device for the fluid passage are used to collect the cleaning liquid after passing through the fluid passage in the liquid tank.
When cleaning a fluid passage having an inner diameter of 10 mm or less, a cleaning liquid obtained by dissolving SiO ₂ and B ₂ O ₃ obtained by passing warm water through a laminate of silica gel and tourmaline is sent to the fluid passage, and the inside of the pipe of the fluid passage is A cleaning method and a cleaning device for a fluid passage for cleaning with a cleaning fluid and collecting the cleaning fluid after passing through the fluid passage in a liquid tank.

A cleaning solution in which abrasive particles having a particle size of 50 to 60 mesh are mixed in a high specific gravity solution is placed in a fluid passage tube having an inner diameter of 10 mm or more, and a cleaning solution in which SiO ₂ and B ₂ O ₃ are dissolved is placed in a fluid passage tube having an inner diameter of 10 mm or less. In addition, a high cleaning effect was obtained by passing each of them.
Further, for the pipe having an inner diameter of 10 mm or more, since the cleaning liquid in which the abrasive is mixed into the high specific gravity liquid is used, there is no problem that the abrasive is precipitated and separated from the cleaning liquid.
Also with respect to the inner diameter 10mm or less of the pipe, so it was used cleaning liquid comprising dissolving SiO ₂ and B ₂ O ₃ in water, no longer the problem of abrasive clogging the tube.
In addition, since the present invention does not use hydrogen oxide or acidic liquid as a cleaning liquid, there is no need to rinse and clean the fluid passage after cleaning with a large amount of water, and the cleaning liquid after use can be discarded as it is. Work is easy and does not pollute the natural environment.
Further, the apparatus having the main tank and the sub-tank at the supply port and the discharge port of the piping eliminates the problem that the invention has an excessive problem, and supplies the cleaning liquid to the fluid passage in a single liquid tank and collects the used cleaning liquid Therefore, it was possible to provide a fluid passage cleaning method and a cleaning device that are possible with a simple and small facility.
In addition, since a polishing agent that is optimal for cleaning the fluid passage is used and a stirring device that stirs the cleaning liquid in the liquid tank is provided, the fluid passage cleaning method and cleaning that can maintain the highest cleaning effect The equipment could be provided.
In addition, slaked lime, silica sand, soft ceramic, shell particles, SiO ₂ and B ₂ O _{3 and} other materials that do not pollute the natural environment are used as abrasives. The rinsing and washing operation with water was simplified.

The invention according to claim 1 is a method of cleaning the inside of the pipe by passing the cleaning liquid through the pipe of the fluid passage, and the cleaning liquid is mixed with abrasive particles having a particle size of 50 to 60 mesh in the high specific gravity liquid. A fluid path cleaning method is a cleaning liquid or a cleaning liquid obtained by dissolving SiO ₂ and B ₂ O ₃ in water.
For piping having an inner diameter of 10 mm or more, it is preferable to use a cleaning liquid obtained by mixing abrasive particles having a particle size of 50 to 60 mesh in a high specific gravity liquid. When an abrasive having a particle size of 50 to 60 mesh is mixed in a high specific gravity liquid having a specific gravity of 1.18 to 1.28, the settling rate of the abrasive in the high specific gravity liquid is slowed down, and the abrasive becomes a high specific gravity liquid for a long time. It is because the effect which floats in is obtained. In addition, a high cleaning effect was obtained in a cleaning test using an abrasive having a particle size that passed through a 60-mesh sieve and mounted on a 50-mesh sieve.
On the other hand, for a pipe having an inner diameter of 10 mm or less, it is preferable to use a cleaning liquid obtained by dissolving SiO ₂ and B ₂ O ₃ in water. As a result of a cleaning test on a cleaning liquid that does not clog in the middle of a pipeline and has a high cleaning effect, a high cleaning effect is obtained when a cleaning liquid in which SiO ₂ and B ₂ O ₃ are dissolved in water is used. Because it was obtained.
The invention of claim 2 is a method of cleaning the inside of the pipe by passing the cleaning liquid through the pipe of the fluid passage. The cleaning liquid is polished to a high specific gravity liquid obtained by mixing slaked lime with water and having a particle size of 50 to 60 mesh. A cleaning method for a fluid passage which is either a cleaning liquid obtained by mixing agent particles or a cleaning liquid containing 50 to 80 ppm of SiO ₂ and ₂₀ to 35 ppm of B ₂ O ₃ in water.
This is because slaked lime is water-soluble, is inexpensive, and does not pollute the natural environment even if discarded as it is, and therefore is preferred as a material for increasing the specific gravity of water.
Also it includes 50~80ppm the SiO ₂ in water, _and, B 2 _{O 3} cleaning test results using a cleaning solution containing 20~35ppm a is because high cleaning effect was obtained.
The invention of claim 3 is a method of cleaning the inside of the pipe by passing the cleaning liquid through the pipe of the fluid passage pipe. The cleaning liquid is a high specific gravity liquid obtained by mixing slaked lime having a size of 5 μm with water. a particle of 5-20% of the amount of abrasive by weight, the washing solution made by mixing the particles of particle size 50 to 60 mesh abrasives or comprises 65~75ppm the SiO ₂ in water, and, B A cleaning method for a fluid passage which is a cleaning liquid of any one of 25 to 33 ppm of ₂ O ₃ is used. Slaked lime with a size of 5 μm is suitable for increasing the specific gravity of water, and up to a size of 5 μm can be filtered using a paper filter. This is because slaked lime can be taken out from the cleaning liquid by filtration and reused, and since the slaked lime is not contained in the cleaning liquid discarded after use, it is further friendly to the natural environment and economical.
Further, as a result of a cleaning test using a cleaning liquid containing 65 to 75 ppm of SiO ₂ and 25 to 33 ppm of B ₂ O ₃ in water, a higher cleaning effect was obtained.

According to a fourth aspect of the present invention, a cleaning liquid obtained by mixing abrasive particles having a particle size of 50 to 60 mesh with a high specific gravity liquid is stored in a liquid tank, and the cleaning liquid is sent into a pipe of a fluid passage using a diaphragm pump. The cleaning liquid that has passed through the pipe is again collected in the liquid tank, and the cleaning liquid is circulated in the pipe of the fluid path, thereby cleaning the inside of the pipe. This is because, in the high specific gravity liquid, the settling speed of the abrasive having a particle size of 50 to 60 mesh is slow and the abrasive floats in the high specific gravity liquid for a long time, so that a high cleaning effect can be obtained.
In addition, diaphragm pumps are suitable for sending cleaning agents containing abrasives with a large particle size into the pipes. When diaphragm pumps are used, the cleaning agent pulsates intermittently in the pipe passages, so it has a high cleaning effect. This is because it is preferable.
The invention according to claim 5 is a high specific gravity liquid obtained by mixing slaked lime having a size of 5 μm with water, and abrasive particles having an amount of 5 to 20% by weight and having a particle size of 50 to 60 mesh. The cleaning liquid in which the agent particles are mixed is stored in the liquid tank, and the cleaning liquid is sent into the pipe of the fluid passage using a diaphragm pump, and the cleaning liquid that has passed through the pipe is again collected in the liquid tank, A fluid passage cleaning method for cleaning the inside of the pipe by circulating the cleaning liquid in the pipe of the fluid path.
Slaked lime is water-soluble, inexpensive and does not pollute the natural environment. Further, slaked lime having a size of 5 μm is suitable for increasing the specific gravity of water, and can be taken out from the cleaning liquid by filtering using a paper filter.
As the amount of the abrasive mixed, it is preferable to mix 5 to 20% of the abrasive in a weight ratio with respect to the high specific gravity liquid. Further, when 10 to 20% of the abrasive is mixed, a high cleaning effect can be obtained.
The invention of claim 6 is a liquid tank capable of storing a cleaning liquid, a cleaning liquid stored in the liquid tank, wherein the cleaning liquid is formed by mixing abrasive particles having a particle size of 50 to 60 mesh in a high specific gravity liquid, The fluid passage cleaning device includes a diaphragm pump that sends the cleaning liquid into the pipe of the fluid passage and collects the cleaning liquid that has passed through the pipe to the liquid tank.
The liquid tank only needs to be suitable for storing the cleaning liquid. In the diaphragm pump, the diaphragm moves as the spool moves, and the two material chambers are sequentially pressurized and depressurized to repeatedly suck and pump the cleaning liquid. The diaphragm pump is used because it is suitable for intermittently sending a cleaning agent containing a polishing agent having a large particle size.
The two material chambers of the liquid tank and the diaphragm pump, the discharge port of the diaphragm pump and the inlet of the fluid passage are connected by piping, and the outlet of the fluid passage and the liquid tank are connected by piping.

Invention of Claim 7 is the liquid tank which can store a washing | cleaning liquid, and the washing | cleaning liquid stored in the said liquid tank, Comprising: It is 5-20 by weight ratio in the high specific gravity liquid obtained by mixing slaked lime of the size of 5 micrometers into water. % Of abrasive particles containing 50 to 60 mesh of abrasive particles, and the cleaning liquid sent to the pipe of the fluid passage and further passed through the pipe. The fluid passage cleaning device includes a diaphragm pump that collects the cleaning liquid and a stirring device that stirs the cleaning liquid stored in the liquid tank.
Slaked lime is water-soluble, inexpensive, and does not pollute the natural environment. Moreover, slaked lime having a size of 5 μm is suitable for increasing the specific gravity of water, and can be taken out from the cleaning liquid by filtering using a paper filter.
Even in high specific gravity liquids, contaminants such as abrasives gradually settle and separate from the cleaning liquid over a long period of time, so a stirring device for stirring the cleaning liquid is provided in the liquid tank. It is intended to prevent the contaminants from settling.
As a stirring device, a structure in which a plate or a rod is mechanically rotated in the cleaning liquid, a structure in which the plate or the rod is reciprocated in the cleaning liquid, or a compressed air is blown out from the lower part of the cleaning liquid to flow upward to the cleaning liquid. The structure etc. which generate | occur | produce are preferable.
At this time, it is preferable to mix 5-20% of abrasive | polishing agent by weight ratio with respect to high specific gravity liquid, and when 10-20% of abrasive | polishing agent is further mixed, a high cleaning effect will be acquired.
The invention of claim 8 is a cleaning liquid obtained by mixing abrasive particles having a particle size of 50 to 60 mesh in a high specific gravity liquid.
This is because, as a result of the test, it was found that the cleaning liquid mixed with the abrasive having a particle size that passed through the 60-mesh sieve and placed on the 50-mesh sieve was a cleaning liquid with a high cleaning effect.
The invention according to claim 9 is a cleaning liquid obtained by mixing abrasive particles having a particle size of 50 to 60 mesh in a high specific gravity liquid obtained by mixing slaked lime with water.
Slaked lime is used because it is water-soluble, is inexpensive, and does not contaminate the natural environment when discarded as it is.

The invention of claim 10 is a high specific gravity liquid obtained by mixing slaked lime with a size of 5 μm in water, and abrasive particles having a particle size of 50 to 60 mesh in an amount of 5 to 20% by weight. The cleaning liquid is made by mixing the particles.
This is because slaked lime having a size of 5 μm is suitable for increasing the specific gravity of water and can be taken out from the cleaning liquid by filtering using a paper filter.
The invention of claim 11 is the invention according to any one of claims 1 to 10, wherein any one of silica sand particles, soft ceramic particles or shell crushed particles is used as an abrasive. And
It is preferable to use commercially available silica sand, crushed particles of clay (kaolin) baked at a temperature of about 1200 degrees Celsius, and crushed scallop shells as the shell. .
The hardness of each abrasive is hard in the order of silica sand> soft ceramic> shell, but if the deposit in the tube is hard, use a soft abrasive, and if the deposit in the tube is soft, use a hard abrasive Then, as a result of the test, a high cleaning effect is obtained.
In the invention of claim 12, the cleaning liquid in which SiO ₂ and B ₂ O ₃ are dissolved in water is stored in a liquid tank, the cleaning liquid is sent into the pipe of the fluid passage using a pump, and the cleaning liquid that has passed through the pipe is again supplied. The fluid passage is cleaned in the pipe by collecting the liquid in the liquid tank and circulating the cleaning liquid in the pipe of the fluid passage.
When silica gel and tourmaline are put in a container and warm water of 35 to 45 degrees Celsius is passed through the silica gel and tourmaline layer, SiO ₂ and B ₂ O ₃ are gradually dissolved. A washing solution to be used is obtained by repeatedly circulating hot water many times and passing the hot water through a layer of silica gel and tourmaline.

In the invention of claim 13, the cleaning liquid containing 50-80 ppm of SiO ₂ and 20-35 ppm of B ₂ O ₃ in water is stored in the liquid tank, and the cleaning liquid is sent into the pipe of the fluid passage using a pump. The cleaning liquid that has passed through the pipe is again collected in the liquid tank, and the cleaning liquid is circulated in the pipe of the fluid path, thereby cleaning the inside of the pipe. This is because a high cleaning effect can be obtained by using a cleaning solution containing 50 to 80 ppm of SiO ₂ and ₂₀ to 35 ppm of B ₂ O ₃ in water. Further, when a cleaning solution containing 65 to 75 ppm of SiO ₂ and 25 to 33 ppm of B ₂ O ₃ is used in water, a higher cleaning effect can be obtained.
The invention of claim 14 is a liquid tank capable of storing a cleaning liquid, a cleaning liquid stored in the liquid tank, wherein the cleaning liquid is obtained by dissolving SiO ₂ and B ₂ O ₃ in water, and the cleaning liquid is placed in a pipe of a fluid passage. And a pump that recovers the cleaning liquid that has passed through the pipe to the liquid tank.
The liquid tank may be any container suitable for storing the cleaning liquid. The pump is not particularly concerned about its type. It is preferable that a pipe is connected between the liquid tank and the pump, a discharge port of the pump and the inlet of the fluid passage, and an outlet of the fluid passage and the liquid tank are connected by a pipe.
The invention of claim 15 is a liquid tank capable of storing a cleaning liquid, a cleaning liquid stored in the liquid tank, wherein the cleaning liquid contains 50 to 80 ppm of SiO ₂ and ₂₀ to 35 ppm of B ₂ O ₃ in water. The fluid passage cleaning device includes a pump that sends the cleaning liquid into the pipe of the fluid passage and collects the cleaning liquid that has passed through the pipe to the liquid tank.
This is because by using a cleaning liquid containing 50 to 80 ppm of SiO ₂ and ₂₀ to 35 ppm of B ₂ O ₃ in water, it is possible to provide a fluid passage cleaning device that can provide a high cleaning effect. Further, it is more preferable to use a cleaning liquid containing 65 to 75 ppm of SiO ₂ and 25 to 33 ppm of B ₂ O ₃ in water.
The invention according to claim 16 is a cleaning liquid obtained by dissolving SiO ₂ and B ₂ O ₃ in water. The present invention provides a cleaning liquid suitable for cleaning a fluid passage having an inner diameter of 10 mm or less and having a high cleaning effect.
The invention of claim 17 is a cleaning liquid containing 50 to 80 ppm of SiO ₂ and ₂₀ to 35 ppm of B ₂ O ₃ in water. The present invention provides a cleaning liquid suitable for cleaning a fluid passage having an inner diameter of 10 mm or less and having a high cleaning effect. Further, a cleaning solution containing 65 to 75 ppm of SiO ₂ and 25 to 35 ppm of B ₂ O ₃ in water is more preferable.

The first embodiment shown in FIG. 1 shows a configuration of the cleaning device 1 and a state in which the fluid passage 9 a of the mold 9 is cleaned by the cleaning device 1. The cleaning device 1 includes a liquid tank 4 for storing the cleaning liquid 6, a blow-out pipe 4 a having a number of holes (not shown) installed in the lower part of the liquid tank 4, a pneumatically driven diaphragm pump 3 and a compressor 7.
In addition, the air supply port 3c and the compressor 7 of the diaphragm pump 3 are connected by an air supply pipe 8d, the air exhaust port 3d and the outlet pipe 4a are connected by an exhaust pipe 8e, and the suction pipe 8a connected to the suction port 3a. The end was immersed in the liquid layer of the cleaning liquid 6, and the discharge port 3b and the inlet 9b of the fluid passage 9a were connected by the transport pipe 8b.
The fluid passage 9 a is a pipe having an inner diameter of 10 mm or more, and the other end of the recovery pipe 8 c connected to the outlet 9 c of the fluid passage 9 a is opened to the top of the liquid tank 4.
Then, a high specific gravity liquid with a specific gravity of 1.2 is manufactured by mixing slaked lime with a size of 5 μm in water, and particles obtained by crushing scallop shells and sieved to a particle size of 50 to 60 mesh are used as abrasives. On the other hand, a mixture of abrasive particles in an amount of 20% by weight was used as the cleaning liquid 6.

The device of the first embodiment is configured as described above, and the operation thereof will be described below. The compressed air supplied from the compressor 7 passes through the air supply pipe 8d and enters the diaphragm pump 3 from the air supply port 3c.
When the spool of the valve in the diaphragm pump 3 is pushed to the material chamber A side by compressed air, the material chamber A is compressed by being pushed by the diaphragm in the material chamber A, and the cleaning liquid in the material chamber A is pressurized and transported from the discharge port 3b. It is pushed out to the pipe 8b. At this time, the air in the material chamber B is depressurized, and the cleaning liquid 6 in the liquid tank 4 is sucked into the material chamber B from the suction port 3a through the suction pipe 8a.
Next, when the spool of the valve in the diaphragm pump 3 is pushed to the material chamber B side by the compressed air, the material chamber B is compressed by being pushed by the diaphragm in the material chamber B, and the cleaning liquid in the material chamber B is pressurized and discharged. It is pushed out from 3b to the transport pipe 8b. At this time, the air in the material chamber A is depressurized, and the cleaning liquid 6 in the liquid tank 4 is sucked into the material chamber A from the suction port 3a through the suction pipe 8a.
In this way, the cleaning liquid 6 in the liquid layer 4 is alternately sucked into the material chamber A or the material chamber B, and is alternately pushed out from the material chamber A or the material chamber B to the transport pipe 8b. Thus, the fluid is sent to the fluid passage 9a via the inlet 9b of the mold 9.
When passing through the fluid passage 9a of the mold 9, the cleaning liquid pulsates and cleans the inner surface of the fluid passage 9a, then flows to the recovery pipe 8c via the outlet 9c of the mold 9, and passes through the recovery pipe 8c. It drops from the upper part of the tank 4 and is collected in the liquid tank 4.
The compressed air discharged from the air exhaust port 3d of the diaphragm pump 3 passes through the exhaust pipe 8e and is jetted into the liquid layer of the cleaning liquid 6 from the numerous holes of the blow-out pipe 4a. As the compressed air is ejected, an upward flow is generated in the liquid layer of the cleaning liquid 6 and the cleaning liquid 6 is stirred.
After washing the fluid passage, shell particles and slaked lime having a size of 5 μm can be filtered through a paper filter and separated from the washing solution. Furthermore, shell particles and slaked lime having a size of 5 μm can be reused by sieving using a sieve.
Since the substance that pollutes nature is not contained in the cleaning liquid from which shell particles and slaked lime with a size of 5 μm are separated, except after the substance that pollutes nature is included in the deposits of the fluid passage, after filtration The cleaning solution can be discarded as it is without being diluted.

2 shows the configuration of the cleaning device 10 and a state in which the fluid passage 19a of the mold 19 is cleaned by the cleaning device 10. The cleaning apparatus 10 includes a liquid tank 14 that stores a cleaning liquid 16 and a pump 13.
Further, the suction pipe 18b connects between the liquid tank 14 and the suction port of the pump 13, the connection between the discharge port of the pump 13 and the inlet 19b of the fluid passage 19a by the transport pipe 18a, and the outlet 19c of the fluid passage 19a. The other end of the recovery pipe 18c to be connected is opened to the upper part of the liquid tank 14. The fluid passage 19a for cleaning in Example 2 was a pipe having an inner diameter of 10 mm or less.
And the cleaning liquid 16 obtained using the cleaning liquid manufacturing machine 20 shown in FIG. 3 was used. The cleaning liquid manufacturing machine 20 has a water heater 21, a container 22, and a laminate 23 formed by stacking 5 mm size silica gel and 5 to 10 mm size tourmaline stored in the container 22.
Hot water at 40 degrees Celsius is supplied to the container 22 through the flow pipe 24a by the water heater 21, and the hot water that has passed through the stack 23 is refluxed to the water heater 21 through the reflux pipe 24b. By performing this circulation operation continuously for a long time, a cleaning liquid containing 70 ppm of SiO ₂ and 30 ppm of B ₂ O ₃ was obtained.
The cleaning liquid 16 in the liquid tank 14 is sucked into the pump 13 through the suction pipe 18b, and is sent from the inlet 19b to the fluid passage 19a of the mold 19 through the transport pipe 18a. When the cleaning liquid passes through the fluid passage 19a, the inner surface of the fluid passage 19a is cleaned, flows from the outlet 19c of the mold 19 to the recovery pipe 18c, passes through the recovery pipe 18c, and falls from the upper part of the liquid tank 14 to fall into the liquid tank. 14 recovered.
Since SiO ₂ and B ₂ O ₃ are not substances that pollute nature, the used cleaning fluid is discarded without being diluted, unless the deposits in the fluid passage contain substances that pollute nature. can do.

  The present invention is not only used in industries that manufacture and sell fluid passage cleaning devices and cleaning liquids, but also in industries that press mold metals using molds, industries that mold plastics such as vacuum molding and extrusion molding, Used in industries that use heat exchangers such as boilers and cooling devices.

1 is a configuration diagram illustrating a configuration of a cleaning device according to Embodiment 1. FIG. It is a block diagram showing the structure of the washing | cleaning apparatus of Example 2. FIG. It is a block diagram showing the structure of the washing | cleaning-liquid manufacturing machine.

Explanation of symbols

1: Cleaning device 3: Diaphragm pump 3a: Suction port
3b: Discharge port 3c: Air supply port 3d: Air exhaust port 4: Liquid tank 4a: Blowing pipe 6: Cleaning liquid 7: Compressor 8a: Suction piping 8b: Transportation piping 8c: Recovery piping 8d: Supply piping 8e: Exhaust piping 9 : Mold 9a: Fluid passage 9b: Inlet 9c: Outlet 10: Cleaning device 13: Pump 14: Liquid tank 16: Cleaning liquid 18a: Transport piping 18b: Suction piping 18c: Recovery piping 19: Mold 19a: Fluid passage 19b: Inlet 19c: Outlet 20: Cleaning liquid manufacturing machine 21: Water heater 22: Container 23: Laminate 24a: Flow pipe 24b: Reflux pipe

Claims (17)

A method of cleaning the inside of the pipe by passing the cleaning liquid through the pipe of the fluid passage,
A cleaning liquid obtained by mixing abrasive particles having a particle size of 50 to 60 mesh in an aqueous solution having a specific gravity of 1.18 to 1.28 (hereinafter simply referred to as “high specific gravity liquid”);
Alternatively, the cleaning method for a fluid passage is characterized by being a cleaning liquid of any one of a cleaning liquid obtained by dissolving SiO ₂ and B ₂ O ₃ in water. A method of cleaning the inside of the pipe by passing the cleaning liquid through the pipe of the fluid passage,
A cleaning liquid obtained by mixing abrasive particles having a particle size of 50 to 60 mesh with a high specific gravity liquid obtained by mixing slaked lime with water,
Alternatively, the cleaning method for a fluid passage is characterized by being a cleaning liquid containing 50 to 80 ppm of SiO ₂ and ₂₀ to 35 ppm of B ₂ O ₃ in water. A method of cleaning the inside of the pipe by passing the cleaning liquid through the pipe of the fluid passage,
A high specific gravity liquid obtained by mixing slaked lime with a size of 5 μm in water is mixed with abrasive particles having a particle size of 50 to 60 mesh in an amount of 5 to 20% by weight. Cleaning liquid,
Alternatively, the cleaning method for a fluid passage is characterized by being a cleaning solution containing 65 to 75 ppm of SiO ₂ and 25 to 33 ppm of B ₂ O ₃ in water.   A cleaning liquid obtained by mixing abrasive particles having a particle size of 50 to 60 mesh in a high specific gravity liquid is stored in a liquid tank, and the cleaning liquid is sent into a pipe of a fluid passage using a diaphragm pump, and the cleaning liquid passes through the pipe. Is recovered in the liquid tank again, and the cleaning liquid is circulated in the pipe of the fluid path to clean the inside of the pipe.   A high specific gravity liquid obtained by mixing slaked lime having a size of 5 μm with water is mixed with abrasive particles having an amount of 5 to 20% by weight, and the particle size is 50 to 60 mesh. The cleaning liquid is stored in a liquid tank, and the cleaning liquid is sent into the pipe of the fluid passage using a diaphragm pump, and the cleaning liquid that has passed through the pipe is again collected in the liquid tank, and the cleaning liquid is stored in the pipe of the fluid passage. A method for cleaning a fluid passage, wherein the inside of the pipe is cleaned by circulating the water.   A liquid tank capable of storing a cleaning liquid, a cleaning liquid stored in the liquid tank, the cleaning liquid obtained by mixing abrasive particles having a particle size of 50 to 60 mesh in a high specific gravity liquid, and the cleaning liquid in a pipe of a fluid passage A fluid passage cleaning apparatus comprising: a diaphragm pump that feeds and recovers the cleaning liquid that has passed through the pipe to the liquid tank.   A liquid tank capable of storing a cleaning liquid, and a cleaning liquid stored in the liquid tank, wherein a high specific gravity liquid obtained by mixing slaked lime having a size of 5 μm with water contains an abrasive having an amount of 5 to 20% by weight. A cleaning liquid in which abrasive particles having a particle size of 50 to 60 mesh are mixed, and a diaphragm pump that sends the cleaning liquid into a pipe of a fluid passage and collects the cleaning liquid that has passed through the pipe to the liquid tank; A fluid passage cleaning device comprising: a stirring device for stirring the cleaning solution stored in the liquid tank.   A cleaning liquid comprising a high specific gravity liquid mixed with abrasive particles having a particle size of 50 to 60 mesh.   A cleaning liquid obtained by mixing abrasive particles having a particle size of 50 to 60 mesh in a high specific gravity liquid obtained by mixing slaked lime with water.   A high specific gravity liquid obtained by mixing slaked lime with a size of 5 μm in water is mixed with abrasive particles having a particle size of 50 to 60 mesh in an amount of 5 to 20% by weight. A cleaning liquid characterized by that.   11. The invention according to any one of claims 1 to 10, wherein any one of silica sand particles, soft ceramic particles or crushed shell particles is used as an abrasive. A cleaning solution in which SiO ₂ and B ₂ O ₃ are dissolved in water is stored in a liquid tank, and the cleaning liquid is sent into a pipe of a fluid passage using a pump, and the cleaning liquid that has passed through the pipe is recovered in the liquid tank again. And cleaning the inside of the pipe by circulating the cleaning liquid in the pipe of the fluid path. A cleaning liquid containing 50 to 80 ppm of SiO ₂ and ₂₀ to 35 ppm of B ₂ O ₃ in water is stored in a liquid tank, and the cleaning liquid is sent into the pipe of the fluid passage using a pump, and passes through the pipe. Is recovered in the liquid tank again, and the cleaning liquid is circulated in the pipe of the fluid path to clean the inside of the pipe. A liquid tank capable of storing a cleaning liquid, a cleaning liquid stored in the liquid tank, wherein the cleaning liquid is obtained by dissolving SiO ₂ and B ₂ O ₃ in water, and the cleaning liquid is sent into a pipe of a fluid passage and further passes through the pipe A fluid passage cleaning apparatus, comprising: a pump that recovers the cleaning liquid to the liquid tank. A liquid tank capable of storing a cleaning liquid, a cleaning liquid stored in the liquid tank, wherein the cleaning liquid contains 50 to 80 ppm of SiO ₂ and ₂₀ to 35 ppm of B ₂ O ₃ in water, and the cleaning liquid is contained in the fluid passage. A fluid passage cleaning apparatus, comprising: a pump for feeding the cleaning liquid that has been fed into the pipe and passing through the pipe to the liquid tank. A cleaning solution obtained by dissolving SiO ₂ and B ₂ O ₃ in water. A cleaning liquid comprising 50 to 80 ppm of SiO ₂ and ₂₀ to 35 ppm of B ₂ O ₃ in water.

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