WO2023027136A1 - 液体処理ノズル - Google Patents

液体処理ノズル Download PDF

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Publication number
WO2023027136A1
WO2023027136A1 PCT/JP2022/031967 JP2022031967W WO2023027136A1 WO 2023027136 A1 WO2023027136 A1 WO 2023027136A1 JP 2022031967 W JP2022031967 W JP 2022031967W WO 2023027136 A1 WO2023027136 A1 WO 2023027136A1
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WO
WIPO (PCT)
Prior art keywords
liquid
leg
core
screw
nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/031967
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English (en)
French (fr)
Japanese (ja)
Inventor
啓雄 加藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takeshita Co Ltd
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Takeshita Co Ltd
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Filing date
Publication date
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Application filed by Takeshita Co Ltd filed Critical Takeshita Co Ltd
Publication of WO2023027136A1 publication Critical patent/WO2023027136A1/ja
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
    • B01F25/452—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
    • B05B15/65—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the present invention relates to a liquid processing nozzle for cavitation processing liquid in which gas is dissolved.
  • Patent Documents 1 to 4 A variety of nozzles have been proposed in which a narrowed portion is provided by a venturi or orifice in the water flow path, and dissolved air is precipitated as fine bubbles due to the decompression effect when the water flows at a high speed.
  • the methods disclosed in Patent Documents 1 and 2 are intended to further increase the speed of water flow by arranging a threaded member in the middle of the flow channel and using the root of the threaded member or the gap formed between the opposing threaded members. It is stated that nanobubbles can be generated at a higher density by improving the cavitation efficiency.
  • Patent Documents 1 to 3 proposals have been made to improve the valley point density in the cross section by arranging a plurality of screw members around the center of the cross section on the same plane in the cross section of the flow channel.
  • it is possible to arrange a plurality of screw members at mutually displaced positions in the direction of the central axis (flow direction) of the liquid flow channel, thereby causing the liquid to flow into valleys that serve as cavitation points. can be brought into contact repeatedly, and can contribute to further improvement in the efficiency of generating fine bubbles and the efficiency of gas dissolution.
  • Patent Documents 1 to 3 when a screw member is assembled to a nozzle body, a screw hole is bored in the nozzle body by a drill or the like, and then a female thread is tapped on the inner surface of the screw hole to form a female screw hole. is screwed together.
  • the drilling of the screw holes in the nozzle body and the tapping of the inner surface of the screw holes must be performed in sequence, and there is a problem that the number of processing steps for the nozzle body increases.
  • screw members are attached to tapped female threaded holes, it is necessary to screw the screw members individually into the female threaded holes using a screwdriver or the like.
  • Patent Documents 1 to 3 the cavitation processing portion made of a screw member is assembled to a core element that is separate from the nozzle casing. From the point of view, the existing technical problems to be solved are the same as those in Patent Documents 1 and 2.
  • the present invention relates to a liquid treatment nozzle that is used by being incorporated into a piping system for circulating liquid, and relates to a nozzle casing that has an accommodating passage portion with openings at both ends, and a liquid inlet opening on one end face and a liquid inlet on the other end face. A position where a penetrating liquid flow path is formed to open the outlet, and the liquid supplied to the inflow side opening formed in the nozzle casing can flow out from the outflow side opening of the nozzle casing through the liquid flow path.
  • the outer peripheral surface side is inserted into the storage passage portion so that it is press-fitted or clearance-fitted into the inner peripheral surface of the storage passage portion, and is formed to penetrate from the outer peripheral surface toward the inner peripheral surface of the liquid flow path.
  • a core body having a screw mounting hole, and a screw member having a cavitation treatment portion in which the head and leg proximal sides are held in the screw mounting holes of the core body, while the leg tip side protrudes from the inner surface of the liquid flow path. and a cavitation core that supersaturates and deposits dissolved gas in the liquid by decompression action when the liquid in contact with the cavitation treatment part accelerates in the root of the thread.
  • the screw mounting hole formed in the core body includes a leg insertion portion for inserting and holding the base end side of the leg portion of the screw member, and an opening portion on the outer peripheral surface side of the core body.
  • a premise structure is provided with a head accommodating portion which is formed integrally with the portion and which is formed to have a diameter larger than that of the leg insertion portion and accommodates the head.
  • the liquid treatment nozzle according to the first aspect of the present invention is characterized by having the following requirements in addition to the above-described prerequisite configuration. That is, when the outer diameter of the male thread formed on the outer peripheral surface of the leg in the leg insertion section is md, and the thread height of the male thread is mtd, the inner diameter hd of the leg insertion section is: md ⁇ mtd ⁇ hd ⁇ md
  • the leg portion of the threaded member is screwed into the leg portion insertion portion of the core body in a self-tapping manner, and when ht is the thickness of the head portion of the threaded member, the thickness of the nozzle casing is The depth of formation of the head accommodating portion is determined so that the distance between the inner peripheral surface of the accommodating passage portion and the top surface of the head is 0.5 ht or less.
  • liquid treatment nozzle in the liquid treatment nozzle according to the first aspect of the present invention (an embodiment is disclosed in FIG. 24), similarly to the configuration disclosed in Patent Document 3, a cavitation core in which a cavitation treatment portion is formed by a screw member is inserted into the accommodation passage portion of the nozzle casing so as to be press-fitted or clearance-fitted.
  • the inner diameter hd of the leg insertion portion formed in the core body is a value slightly smaller than the outer diameter md of the male threaded portion of the screw member, and md-mtd or more (preferably , md ⁇ 0.8mtd or more, more preferably md ⁇ 0.7mtd or more), the leg portion of the screw member is screwed into the leg portion insertion portion of the core body in a self-tapping manner.
  • this configuration means that the wrap length ftd between the thread of the male threaded portion and the female threaded portion is 0.5 mtd or less.
  • the wrap length is preferably 0.4 mtd or less, more preferably 0.35 mtd or less.
  • the leg of the screw member is engaged in the leg insertion portion by self-tapping. Since the force acts sufficiently, it is possible to reliably prevent the screw member from falling off from the core body when the screw member is assembled to the core body.
  • leg portion of the screw member when the leg portion of the screw member is attached to the leg insertion portion, it is necessary to screw the screw member into the leg insertion portion while self-tapping using a screwdriver or the like.
  • self-tapping forming a shallow internal thread on the inner surface of the leg insertion portion, for example, when it is desired to replace a screw member that has worn out due to repeated cavitation processing, or when a screw member with a different leg length is used in the leg insertion portion
  • the screw member can be easily pulled out from the leg insertion portion by rotating the screw member in the direction opposite to that at the time of assembly.
  • the inner diameter hd of the leg insertion portion is less than md-mtd, it will be difficult to engrave the internal thread portion in the leg insertion portion by self-tapping.
  • the leg insertion portion includes a first portion having a first inner diameter hd1 including an end portion on the connection side with the head accommodating portion, and an end portion on the connection side with the liquid flow path. and a second portion having a second inner diameter hd2 smaller than the first inner diameter hd1.
  • the first portion The first inner diameter hd1 of md ⁇ hd1 ⁇ hd3 can be defined to be within the range of The legs of the threaded member are inserted with a clearance fit into the first portion.
  • the second inner diameter hd2 of the second portion is md ⁇ mtd ⁇ hd2 ⁇ md and the leg of the threaded member can be screwed into the second portion in a self-tapping fashion.
  • the liquid processing nozzle according to the second aspect of the present invention constitutes a subordinate concept of the liquid processing nozzle according to the first aspect of the present invention.
  • a nozzle casing having a housing passage portion with both ends open, and a penetrating liquid flow passage having a liquid inlet opening on one end surface and a liquid outlet opening on the other end surface are formed in the nozzle casing.
  • the nozzle casing is arranged in the housing passage in such a positional relationship that the liquid supplied to the inflow side opening can flow out from the outflow side opening of the nozzle casing through the liquid flow path, and the liquid flow path extends from the outer peripheral surface.
  • the screw mounting hole formed in the core body includes a leg insertion portion for inserting and holding the base end side of the leg portion of the screw member, and a leg portion that forms an opening on the outer peripheral surface side of the core body
  • the first inner diameter hd1 of the first portion is: md ⁇ hd1 ⁇ hd3 and the leg of the threaded member is inserted into the first part in a clearance fit, while the second inner diameter hd2 of the second part is md ⁇ mtd ⁇ hd2 ⁇ md and wherein the leg of the threaded member is screwed into the second portion in a self-tapping manner.
  • the leg insertion portion can be formed to have a diameter smaller than that of the leg portion within the range where the leg portion can be screwed in by self-tapping.
  • ⁇ A first portion larger in diameter than the leg portion of the screw member is formed in the leg insertion portion on the side connected to the head accommodating portion, followed by a second portion smaller in diameter than the leg portion of the screw member. Therefore, by inserting the leg portion of the threaded member into the first portion, the leg portion of the threaded member is stably held in the form of a clearance fit. By self-tapping the leg portion to the second portion in this state, the tip of the leg portion of the screw member can be very smoothly bitten into the second portion.
  • the leg portion of the screw member By inserting the leg portion of the screw member into the first portion with a clearance fit, the axis line of the leg portion can be aligned parallel to the axis line of the second portion using the first portion as a guide. Therefore, the leg portion of the screw member is less likely to bite into the leg insertion portion in an inclined state. From the viewpoint of stably holding the leg portion of the threaded member with a clearance fit by the first portion, it is preferable that hd1 ⁇ md+mtd, more preferably hd1 ⁇ md+0.5mtd.
  • hd1 ⁇ 0.9hd3 (more preferably hd1 ⁇ 0.8hd3) is preferably satisfied.
  • the length of the first portion is ensured to be 3P or more, where P is the pitch of the thread formed on the leg portion. It is desirable that Moreover, when the screw member is made of metal and the core body is made of a resin material, it is desirable that the length of the second portion is set to 1P or more and 10P or less. If the length of the second portion is less than 1P, the number of pitches of the internal thread formed on the inner peripheral surface of the second portion becomes insufficient due to self-tapping.
  • the effect of restricting movement of the leg portion of the screw member in the thrust direction may be insufficient.
  • the length of the second portion exceeds 10P, the load when screwing the leg portion of the screw member by self-tapping increases, and workability may deteriorate when the screw member is attached to the core body. More desirably, the length of the second portion is set to 2P or more and 7P or less.
  • a liquid treatment nozzle includes a nozzle casing having an accommodating passage portion with both ends opened, and a liquid nozzle on one end face.
  • a penetrating liquid flow path having an inlet opening and a liquid outlet opening on the other end face is formed.
  • a core body having a screw mounting hole formed through from the outer peripheral surface toward the inner peripheral surface of the liquid channel, the head and the head;
  • a screw member having a base end of the leg held in the screw mounting hole of the core body and a tip end of the leg protruding from the inner surface of the liquid channel as a cavitation treatment portion, and the liquid in contact with the cavitation treatment portion.
  • the screw mounting hole formed in the core body is positioned so that the base end of the leg portion of the screw member
  • a leg insertion portion for inserting and holding the leg insertion portion is integrally formed with the leg insertion portion so as to form an opening on the outer peripheral surface side of the core body.
  • the leg insertion portion includes a first portion having a first inner diameter hd1 including an end on the connection side with the head accommodation portion, and an end on the connection side with the liquid flow path and a second portion having a second inner diameter hd2 smaller than the first inner diameter hd1, wherein md is the outer diameter of the male thread formed on the outer peripheral surface of the leg in the leg insertion portion, and the thread height of the male thread is mtd, and the inner diameter of the head accommodating portion is hd3, the first inner diameter hd1 of the first portion is md ⁇ hd1 ⁇ hd3 and the leg of the threaded member is inserted into the first part in a clearance fit, while the second inner diameter hd2 of the second part is md ⁇ mtd ⁇ hd2 ⁇ md is defined to be within the range of The configuration up to this point is the same as the above-described second configuration.
  • the screw member is made of metal, the core body is made of a resin material, and the length of the second portion is the length of the second portion, where P is the pitch of the thread formed on the leg. is set to 1P or more and 2P or less, and the leg portion of the screw member is press-fitted into the inner peripheral surface of the second portion, and the tip thereof protrudes into the liquid flow path.
  • the third configuration above is the same as the second configuration in that the lower limit of the length of the second portion is 1P or more, but the upper limit is set short, 2P or less.
  • the core body is made of a resin material and the screw member is made of metal, when the screw member is attached to the leg insertion portion, the leg portion is loosely fitted to the first portion, and then to the second portion.
  • the metal leg instead of screwing in the screw member by self-tapping, by press-fitting it in the axial direction (thrust direction), the metal leg is pushed into the core in such a way that the screw thread goes over the resin inner peripheral surface of the second part. It can be attached to the body.
  • the inside of the housing passage portion of the nozzle casing is It is desirable to employ a nozzle structure in which the top surface of the head of the screw member is restricted by the peripheral surface.
  • the top surface of the head of the threaded member is It is desirable that it is abutted against the inner peripheral surface of the housing passage portion of the nozzle casing.
  • the nozzle casing can be configured as follows. That is, in the direction of liquid flow, the side where one of the liquid inlet and the liquid outlet of the nozzle casing is located is the first side (or front end), and the other side is the second side (or rear end).
  • the casing is composed of a casing main body that constitutes the first side and a core holding portion that constitutes the second side.
  • the casing main body has an accommodation passage formed in a second side end surface with a core insertion opening, and the second side end of the casing main body extends beyond the second side end surface of the cavitation core inserted into the accommodation passage.
  • a female screw for assembly is formed on the inner peripheral surface of the second side end.
  • the outer peripheral surface of the first side end portion of the core pressing portion is formed with an assembly male thread portion that is screwed with the assembly female thread portion of the casing body, and the assembly male thread portion is screwed and fastened to the assembly male thread portion.
  • the core holding portion retains the cavitation core in such a manner that the first side end face abuts against the outer peripheral edge portion of the second side end face of the cavitation core.
  • the first side end of the casing body and the second side end of the core holding portion are engraved with a nozzle side threaded joint portion to be screwed with the first threaded joint of the piping system on one side, and the piping system on the other side.
  • a cap nut is rotatably fitted to the externally threaded portion forming the second screw joint.
  • Patent Document 4 discloses, for example, a configuration in which a cavitation core, which has a large number of screw members and requires a large number of assembly steps, is separated from the nozzle casing. According to this configuration, the cavitation core is assembled in advance by an external setup, and the assembled assembly is attached to the nozzle casing, thereby simplifying the assembly process of the entire nozzle.
  • a cavitation core is housed in a casing main body that constitutes a nozzle casing, and a core holding portion that is screwed together prevents the cavitation core from coming off.
  • the threaded joint of the core pressing portion is a female threaded portion, and a hexagonal tool engaging portion is formed on the outer peripheral surface thereof.
  • the liquid treatment nozzle is incorporated into the piping system by screwing the threaded joints formed at both ends of the nozzle casing to the threaded joints of the piping system.
  • a wrench is engaged with the tool engaging portion of the core pressing portion to prevent rotation of the core pressing portion, while another wrench is rotated on the pipe side to unscrew the core pressing portion and the pipe.
  • the wrench engaged with the tool engaging portion of the core pressing portion is rotated to unscrew the casing main body and the pipe.
  • the threaded engagement between the core holding portion and the casing body will be loosened before the casing body and the pipe are unscrewed, and the nozzle casing will be formed. This leads to the problem of unintentional separation between the casing main body and the core holding portion. This problem can also occur when the tool engaging portion is formed on the casing main body side.
  • a nozzle-side threaded joint portion to be screwed with the first threaded joint of the piping system is engraved on one of the first side end portion of the casing main body and the second side end portion of the core holding portion, and the other end is provided with a pipe.
  • the casing main body and the core pressing portion are separated by engaging a tool with the box nut and rotating it.
  • the cap nut and the piping system can be unscrewed without affecting the screwed connection with the nozzle casing, and the casing main body and the core holding portion that form the nozzle casing can be unintentionally separated. can be effectively prevented.
  • the outer peripheral surface of the casing body is engaged with a fastening tool used when assembling the liquid treatment nozzle to the piping system. It is preferable to form a tool engaging portion having at least one pair of parallel surfaces for the purpose. After unscrewing the cap nut on the side of the core holding portion and the corresponding pipe, if a wrench or the like is engaged with the tool engaging portion formed on the outer peripheral surface of the casing body and rotated, the casing body can be removed. The threaded connection with the piping on the casing main body side can be smoothly released without damage.
  • the second side end portion of the core holding portion is provided with an assembly screw which forms part of the liquid flow path and is used when screwing the assembly male thread portion of the core holding portion to the assembly female thread portion of the casing body.
  • a tool engaging hole for engaging a tool can also be formed through.
  • the casing main body can be provided with an additional function part that adds an additional function to the liquid treatment nozzle. Additional functions can be easily added to the liquid treatment nozzle by incorporating such a second body into the casing body.
  • the type of additional function added to the liquid treatment nozzle by the additional function unit is not particularly limited.
  • the additional function section can be provided with a channel adjustment valve for switching the channel cross-sectional area of the liquid channel continuously or stepwise.
  • the flow rate of the piping system in which the liquid treatment nozzle is incorporated can be easily adjusted by the channel adjustment valve.
  • the concept of switching the cross-sectional area of the channel may include blocking the channel. In this case, switching the channel between two states of fully closed (blocked) and fully open (open) is also included in the concept of "stepwise switching of channel cross-sectional area".
  • the additional function section can be configured to include a branch pipe for branching and circulating the liquid from the liquid channel.
  • branch pipe for branching and circulating the liquid from the liquid channel.
  • the form of use of the branch pipe is not particularly limited, for example, the end of the branch pipe opposite to the end connected to the second main body of the casing body receives the inflow of the liquid from the branch pipe.
  • a chemical solution holding part is provided for eluting the chemical solution into the received liquid, and the liquid in the branch pipe in which the chemical solution has been eluted is configured to slowly release and flow out from the connection end of the branch pipe with the casing main body to the liquid channel side in a backflow form. can do.
  • an appropriate amount of the chemical solution can be continuously injected into the liquid flowing through the piping system to the liquid cavitation-treated by the liquid treatment nozzle. can do.
  • the effect of cavitation to improve the permeability of the liquid is added to further improve the cleaning power of the liquid, or to reduce the amount of chemical injected to ensure the same level of cleaning power.
  • FIG. 2 of Patent Document 4 discloses the configuration of the liquid treatment nozzle 100 in which the rectifying element 63 is arranged downstream of the cavitation core 1 within the nozzle casing 50 .
  • the rectifying element 63 is mounted in contact with the inner peripheral surface of the nozzle casing 50 made of metal, and is provided separately from the cavitation core 1 .
  • the rectifying element 63 rectifies the tap water after the generation of bubbles in the flow direction and causes it to flow out.
  • the liquid flow direction to the liquid treatment nozzle 100 is intended to be only one direction from the cavitation core 1 to the rectifying element 63 .
  • the liquid processing nozzle of Patent Document 4 has the following problems. ⁇ Since the rectifying element is provided only on the downstream side of the cavitation core, the effect of the rectifying element is limited to suppressing coalescence due to the collision of fine bubbles that have stopped growing at the collision part of the cavitation core. ⁇ The mounting direction of the liquid treatment nozzle to the piping system may be reversed from the normal mounting direction due to the connection with the threaded joint on the piping system side. In this case, the flow of the liquid changes from the rectifying element to the cavitation core, and the rectifying element cannot function as intended. - When assembling the liquid treatment nozzle, the rectifying element and the cavitation core must be sequentially attached to the nozzle casing, increasing the number of man-hours.
  • the cavitation core can be configured as follows. That is, the liquid channel of the core body of the cavitation core is configured such that a section including the midpoint of the central axis of the liquid channel is a narrowed portion having a cylindrical surface shape, and portions forming the front and rear sections of the narrowed portion of the liquid flow channel are narrowed respectively. A pair of enlarged diameter portions having a diameter larger than that of the core body is formed, and a screw mounting hole is arranged in the constricted portion together with a screw member, and a rectifying member is arranged inside each of the enlarged diameter portions in a form integrated with the core body.
  • a straightening member is provided not only on the downstream side of the cavitation core but also on the upstream side.
  • the rectifying member can function as intended regardless of whether the mounting direction of the liquid treatment nozzle to the piping system is reversed due to the connection with the threaded joint on the piping system side.
  • the flexibility in the mounting direction of the liquid treatment nozzle to the piping system is greatly improved.
  • This effect is particularly remarkable when the rectifying members respectively arranged in the pair of enlarged diameter portions have the same configuration.
  • the rectifying member Since the rectifying member is integrally attached to the enlarged diameter portion of the core body, the rectifying member and the core body can be collectively attached to the nozzle casing as an integrated assembly when assembling the liquid treatment nozzle. As a result, the assembling process of the liquid treatment nozzle can be simplified.
  • the rectifying member is formed by bending a metal elastic belt-shaped member into a zigzag form so that crests and troughs appear alternately along the creases in the direction of the short side, and then rolling it around an axis parallel to the short side. It may be a star-shaped flow straightening member formed to have a cross-sectional configuration of a shape.
  • the star-shaped rectifying member is inserted into the enlarged diameter portion so that the direction of the short side coincides with the axis of the enlarged diameter portion.
  • the enlarged diameter portion can be formed as a cylindrical surface whose inner peripheral surface is larger in diameter than the narrowed portion and can be connected to the narrowed portion via a stepped surface.
  • the star-shaped rectifying member is formed to have a diameter larger than the inner diameter of the enlarged diameter portion in a free state, and is press-fitted into the enlarged diameter portion while elastically contracting in the radial direction with respect to the axis, and the front end side is pushed into the enlarged diameter portion. It can be integrated with the core body in such a manner that the outer peripheral surface side is gripped by the inner peripheral surface of the enlarged diameter portion due to the elastic restoring force in the radial direction in the state of contact with the stepped surface. As a result, the star-shaped rectifying member is less likely to come off from the core body, and the process of mounting the assembly of the rectifying member and the core body to the nozzle casing can be stabilized.
  • FIG. 2 is a perspective view showing an example of incorporating the liquid treatment nozzle of the present invention into a water pipe.
  • FIG. 3 is a cross-sectional front view of a cavitation core used in the liquid treatment nozzle of FIG. 2;
  • FIG. 4 is an axial sectional view showing the screw member layout on the first screw arrangement surface of the cavitation core;
  • FIG. 6 is an axial cross-sectional view showing the threaded member layout on the second threaded surface of the cavitation core;
  • FIG. 4B is an axial cross-sectional view showing an enlarged main part of FIG. 4A;
  • FIG. 4 is a conceptual diagram showing a modification in which all of the face screw sets of the cavitation core shown in FIG. 3 are arranged in the same phase;
  • FIG. 4 is an axial cross-sectional view showing an example of formation of a screw mounting hole and an example of an arrangement form of a screw member in the screw mounting;
  • FIG. 6B is an axial cross-sectional view showing an enlarged vicinity of the male screw portion of the screw member in FIG. 6A;
  • FIG. 6B is a first explanatory view showing a process of mounting a screw member in the screw mounting hole of FIG. 6A; Explanatory drawing following FIG. 7A.
  • FIG. 4 is an axial cross-sectional view showing an example of formation of a screw mounting hole and an example of an arrangement form of a screw member in the screw mounting;
  • FIG. 6B is an axial cross-sectional view showing an enlarged vicinity of the male screw portion of the screw member in FIG. 6A;
  • FIG. 6B is a first explanatory view showing
  • FIG. 4 is an axial cross-sectional view showing an enlarged first example of an arrangement form in the vicinity of the head portion of the screw member in the screw mounting hole; An axial cross-sectional view similarly showing an enlarged second example. An axial cross-sectional view similarly showing an enlarged third example.
  • FIG. 3 is a cross-sectional front view showing an enlarged core pressing portion of the liquid treatment nozzle of FIG. 2 ; The figure which shows the detail of a rectification
  • FIG. 2 is a view for explaining a process of assembling the liquid treatment nozzle to the piping system of FIG. 1; 3A and 3B are diagrams showing a state in which the liquid treatment nozzle of FIG.
  • FIG. 5 is a cross-sectional view showing an example of a screw mounting hole of a core body used in the liquid treatment nozzle according to Embodiment 2 of the present invention
  • FIG. 16 is an explanatory view of the operation of the screw mounting hole in FIG. 15
  • 18 is a plan view of a core plate used in the liquid treatment nozzle of FIG. 17
  • FIG. 18 is a cross-sectional front view of a multi-core assembly incorporated into the liquid treatment nozzle of FIG. 17;
  • FIG. 4 is a plan view of a core plate when the number of cavitation cores to be assembled is 3; The front view and front sectional drawing of the liquid processing nozzle concerning Embodiment 4 of this invention.
  • FIG. 5 is a front cross-sectional view of a liquid treatment nozzle according to Embodiment 5 of the present invention; The front view and front sectional drawing of the liquid processing nozzle concerning Embodiment 6 of this invention.
  • FIG. 11 is a front cross-sectional view of a liquid treatment nozzle according to Embodiment 7 of the present invention;
  • FIG. 25 is an axial cross-sectional view showing an example of an arrangement form of screw members in screw mounting holes in the liquid treatment nozzle of FIG. 24;
  • FIG. 25B is an axial cross-sectional view showing an enlarged vicinity of the male screw portion of the screw member in FIG. 25A;
  • FIG. 2 is a front cross-sectional view showing an embodiment of a liquid processing nozzle having a gas introduction mechanism provided in a cavitation processing section;
  • FIG. 1 is a perspective view showing an example of a water pipe system incorporating the liquid treatment nozzle of the present invention.
  • a cold water supply unit 1203 directly connected to the water supply and a hot water supply unit 1204 connected to a water heater (not shown) are connected to a hot water mixing valve 1201 via a stop cock 1211 and piping systems 1205 and 1206, respectively.
  • the hot and cold water mixing valve 1201 mixes cold water from the cold water supply unit 1203 and hot water from the hot water supply unit 1204 at a mixing ratio and flow rate according to the operating state of the lever 1202, and causes the mixture to flow out from the outlet 1201a. belongs to. Both of the piping systems 1205 and 1206 have the same configuration. It has a configuration in which the liquid treatment nozzle 100 of the embodiment is incorporated. The liquid treatment nozzle 100 may be provided only on one of the cold water supply section 1203 and the hot water supply section 1204, for example, only on the cold water supply section 1203 side.
  • FIG. 2 is an enlarged view of the liquid treatment nozzle taken out.
  • the liquid treatment nozzle 100 is a second embodiment of the present invention and has a nozzle casing 50 .
  • the side where one of the liquid inlet and the liquid outlet of the nozzle casing 50 is located is the first side (the left side in FIG. 2), and the other side is the second side.
  • the nozzle casing 50 consists of a casing main body 50B constituting the first side and a core pressing portion 50A constituting the second side, both of which are metal (for example, a copper alloy such as brass (chromium Alternatively, it may be covered with a plated layer such as nickel), and is composed of a ferrous material such as stainless steel).
  • the liquid treatment nozzle 100 is capable of bi-directionally circulating tap water as a liquid. Each functions as an outflow opening, and vice versa when water flows in the opposite direction.
  • the side including the first side opening 54 of the nozzle casing 50 is configured as a cylindrical casing main body 50B, and the side including the second side opening 55 is configured as a core pressing portion 50A.
  • the casing main body 50B has an accommodation passage portion 56 formed in the second side end surface thereof so as to open the core insertion port 50p.
  • a second side end portion extends, and an assembly female screw portion 50g is formed on the inner peripheral surface of the second side end portion.
  • At the first side end of the casing main body 50B one end in the axial direction opens as the first side opening 54 and the other end communicates with the housing passage 56, forming a part of the liquid flow path 3.
  • a first side passage portion 50u is formed to penetrate.
  • an assembly male threaded portion 50d that is screwed with the assembly female threaded portion 50g of the casing main body 50B is formed on the outer peripheral surface of the first side end portion of the core pressing portion 50A.
  • an assembly male threaded portion 50d that is screwed with the assembly female threaded portion 50g of the casing main body 50B is formed on the outer peripheral surface of the first side end portion of the core pressing portion 50A.
  • 50e is fitted on the outer peripheral surface of the first side end portion of the core pressing portion 50A so as to pass through the core pressing portion 50A in the axial direction.
  • a flange portion 50f that protrudes radially outward is formed on the outer peripheral surface of the core pressing portion 50A.
  • the screwing amount of the assembly male threaded portion 50d relative to the assembly female threaded portion 50g is restricted.
  • the outer peripheral surface of the flange portion 50f is also used as an engaging surface for a tool or jig when screwing the core pressing portion 50A to the casing main body 50B during assembly of the nozzle casing 50. As shown in FIG.
  • the core holding portion 50A has the first side end surface (in this embodiment, the bottom surface of the counterbore 50n) on the second side end surface of the cavitation core 1. It is held in place so that it does not come off. On the other hand, the first side end surface of the cavitation core 1 is abutted against the outer peripheral edge portion of the first side end portion of the accommodation passage portion 56 .
  • a nozzle-side screw joint portion 51 that screws together with a first screw joint 1213a (Fig. 13) of the piping system is engraved on the first side end portion of the casing main body 50B.
  • a cap nut 50C is rotatably fitted to the second side end portion of the core pressing portion 50A so as to be screwed with the male thread portion forming the second screw joint 1212 (FIG. 13) of the piping system.
  • a hexagonal tool engaging surface 53 is formed on the outer peripheral surface of the cap nut 50C.
  • FIG. 11 shows an enlarged view of the core pressing portion 50A and the cap nut 50C.
  • the outer peripheral surface of the second side end portion of the core pressing portion 50A is a cylindrical surface, and a groove 50k is formed in the front end portion thereof in the circumferential direction, and a metal snap ring 58 is fitted in the groove 50k. ing.
  • a circumferential flange portion 50r protrudes from the inner peripheral edge of the first side end portion of the cap nut 50C.
  • the inner diameter of the flange portion 50r is set larger than the outer diameter of the second side end portion of the core pressing portion 50A and smaller than the outer diameter of the snap ring 58 fitted in the groove 50k.
  • the second side end portion of the core pressing portion 50A is inserted inside the flange portion 50r of the cap nut 50C, and in this state, the snap ring 58 is attached to the outside of the core pressing portion 50A.
  • the cap nut 50C is elastically expanded by a jig (not shown), and the attached snap ring 58 is axially pushed toward the groove 50k. bring back.
  • the cap nut 50C is fitted to the core pressing portion 50A so as to be relatively rotatable about the axis while being axially retained by the snap ring 58. As shown in FIG.
  • the outer peripheral surface of the casing body 50B has at least one pair of parallel surfaces for engagement with a fastening tool used when assembling the liquid treatment nozzle 100 to the piping system.
  • An engaging portion 57 is formed.
  • the tool engaging portion 57 is formed as a hexagonal portion having three parallel portions on the outer peripheral surface of the first side end portion of the casing body 50B.
  • the nozzle side threaded joint portion 51 formed at the first side end portion of the casing main body 50B is formed as a male threaded portion.
  • the dimensions of the male threaded portion of the nozzle-side threaded joint 51 and the dimensions of the female threaded portion 52 of the cap nut 50C are not particularly limited, but in FIG. there is A plate-like seal ring 50s is mounted inside the cap nut 50C.
  • a liquid flow path 9A is formed through in the axial direction.
  • the cavitation core 1 has a positional relationship with respect to the nozzle casing 50 such that the liquid supplied from one of the first side opening 54 and the second side opening 55 can flow out from the other through the liquid flow path 9A.
  • side is inserted into the inner peripheral surface of the housing passage portion 56 in the axial direction so as to be a press fit or a clearance fit.
  • the core body 1M has a cylindrical outer peripheral surface, and is inserted into the accommodation passage portion 56 from the core insertion opening 50p.
  • FIG. 3 is an enlarged sectional view of the cavitation core 1
  • FIGS. 4A and 4B are axial sectional views.
  • a screw mounting hole 19 is formed in a form penetrating from the outer peripheral surface of the core body 1M toward the inner peripheral surface of the liquid flow path 9A.
  • the head 10h and the leg 10f are held in the screw mounting hole 19 of the core body 1M at the base ends thereof, while the tip end of the leg 10f protrudes from the inner surface of the liquid channel 9AA to form the cavitation processing section CV.
  • a plurality of screw mounting holes 19 are formed in the core body 1M, and a screw member 10 is mounted in each of them.
  • the liquid In the cavitation treatment portion CV, the liquid supersaturates and deposits the dissolved gas due to the decompression action when the liquid accelerates in the root portion as it contacts the male screw portion formed in the leg portion 10f.
  • the material of the core body 1M is, for example, resin such as ABS, nylon, polycarbonate, polyacetal, and PTFE (polytetrafluoroethylene). selected as appropriate.
  • the material of the screw member 10 is, for example, stainless steel, but depending on the application, a heat-resistant alloy such as titanium, Hastelloy, or Inconel (both of which are registered trademarks) may be used. is a problem, it is also possible to use a ceramic material such as quartz or alumina. In particular, quartz is suitable for use in fields where metal contamination is disliked (for example, the field of semiconductor manufacturing).
  • the resin cavitation core 1 may be made of PTFE, for example.
  • FIG. 6A is an enlarged axial cross-sectional view showing the screw mounting hole 19 of the core body 1M and the arrangement of the screw member 10 with respect to the screw mounting hole 19, and FIG. It is a diagram showing.
  • the screw mounting hole 19 formed in the core body 1M has a leg insertion portion 19f for inserting and holding the base end side of the leg portion 10f of the screw member 10, and an opening on the outer peripheral surface side of the core body 1M.
  • a head accommodating portion 19h is integrally formed with the leg insertion portion 19f and has a larger diameter than the leg insertion portion 19f and accommodates the head.
  • the inner diameter hd2 of the leg portion insertion portion 19f is: , md ⁇ mtd ⁇ hd2 ⁇ md is defined to be within the range of As shown in FIG. 6A, the leg portion 10f of the screw member 10 is screwed into the leg insertion portion 19f of the core body 1M in a self-tapping manner.
  • Reference numeral 10e is a tool engaging recess for engaging a tool such as a screwdriver.
  • the formation depth of the head accommodation portion 19h is determined by the inner peripheral surface 56P of the accommodation passage portion 56 and the top of the head portion 10h.
  • the distance from the surface is determined to be 0.5ht or less.
  • a narrow gap GP1 (for example, 0.15 mm or less) is formed between the inner peripheral surface 56P of the housing passage portion 56 and the outer peripheral surface 1P of the core body 1M.
  • the top surface of the head 10h protrudes from the opening of the head accommodating portion 19h by a height corresponding to the gap GP1, and is in a state of being held against the inner peripheral surface 56P of the accommodating passage portion 56.
  • a gap GP2 is formed between the outer peripheral surface of the head portion 10h of the screw member 10 and the inner peripheral surface of the head accommodating portion 19h.
  • the leg insertion portion 19f of the core body 1M does not need to be deeply tapped in advance with the female thread portion for screwing the male thread portion 10mt of the screw member 10, and the number of processing steps can be reduced. can. Further, since the top surface of the head portion 10h of the screw member 10 is abutted against the inner peripheral surface of the housing passage portion 56, the position of the top surface of the head portion 10h is restricted by the inner peripheral surface of the housing passage portion 56. , the screw member 10 in the screw mounting hole 19 is free from rattling in the thrust direction. Therefore, by circulating the liquid through the liquid channel 9A of the cavitation core 1, the cavitation process can be performed without any problem.
  • the screw member 10 when attaching the leg portion 10f of the screw member 10 to the leg insertion portion 19f, the screw member 10 is screwed into the leg insertion portion 19f by self-tapping with a screwdriver or the like.
  • a screwdriver or the like As a result of forming a shallow internal thread on the inner surface of the leg insertion portion 19f by self-tapping, for example, when it is desired to replace the screw member 10 that has worn out due to repeated cavitation processing, or when the screw member 10 having a different leg length is to be inserted into the leg portion.
  • the screw member 10 is erroneously assembled to the portion 19f, it is possible to easily remove the screw member 10 from the leg insertion portion 19f by rotating the screw member 10 in the direction opposite to that at the time of assembly.
  • the radial wrap length ftd between the female threaded portion 19ft formed by self-tapping and the male threaded portion 10mt of the screw member 10 is 0.5 mtd or less (preferably 0.4 mtd or less, more preferably 0.4 mtd or less). is 0.35 mtd or less).
  • the screw member 10 in the screw mounting hole 19 has a force in the thrust direction. There is no need to worry about excessive tatsuki.
  • the wrap length is small, the threaded member 10 and the leg insertion portion 19f are screwed together, so that when the cavitation core 1 is attached to the accommodation passage portion 56, it can be screwed from the screw attachment hole 19 of the core body 1M.
  • the member 10 is less likely to come off.
  • the leg insertion portion 19f of FIG. 6A is configured as follows. That is, the leg insertion portion 19f includes a first portion 19f1 having a first inner diameter hd1 including an end portion on the connection side with the head housing portion 19h, and an end portion on the connection side with the liquid flow path 3 which is larger than the first inner diameter hd1. and a second portion 19f2 having a smaller second inner diameter hd2.
  • the first inner diameter hd1 of the first portion 19f1 is md ⁇ hd1 ⁇ hd3
  • the leg portion 10f of the threaded member 10 is inserted into the first portion 19f1 with a clearance fit, as shown on the left side of FIG. 6B.
  • the second inner diameter hd2 of the second portion 19f2 is md ⁇ mtd ⁇ hd2 ⁇ md
  • the leg portion 10f of the screw member 10 is screwed into the second portion 19f2 in a self-tapping manner, as shown on the right side of FIG. 6B.
  • the inner diameter hd2 of the second portion 19f2 is preferably md-0.8mtd or more, more preferably md-0.7mtd or more. If the second inner diameter hd2 of the second portion of the leg insertion portion is less than md-mtd, it becomes difficult to engrave a female thread portion in the leg insertion portion by self-tapping. In addition, in order to ensure the effect of engraving the female thread, the second inner diameter hd2 of the second portion of the leg insertion portion should be set to md-0.2 mtd or less, more preferably md-0.4 mtd or less. is good.
  • the aforementioned wrap length ftd of 0.1 mtd or more, more preferably 0.2 mtd or more. From the viewpoint of stably holding the leg portion 10f of the screw member 10 by loose fitting with the first portion 19f1, hd1 ⁇ md+mtd, and more preferably hd1 ⁇ md+0.5mtd. Further, from the viewpoint of ensuring that the bearing surface of the screw head 10h can be held against the stepped surface formed between the head accommodation portion 19h and the leg insertion portion 19, hd1 ⁇ 0.9hd3 (more Desirably, hd1 ⁇ 0.8hd3) is satisfied.
  • the screw member is a JIS M1.4 normal pitch No. 0 class 1 pan head machine screw
  • mtd is 0.1625 mm
  • the screw pitch P is 0.3 mm
  • the screw head outer diameter is ⁇ 2.0 mm
  • the height is the same.
  • the height is 0.5 mm.
  • the outer diameter of the core body 1M is ⁇ 13 mm
  • the inner diameter of the throttle portion 9 is ⁇ 8.0 mm.
  • the leg insertion portion 19f has an inner diameter of ⁇ 2.1 mm and a depth of 0.8 mm.
  • the leg insertion portion 19f has a first portion 19f1 with a depth of 1.7 mm (approximately 5.7P) and a second portion 19f2 with a depth of 0.9 mm (3P).
  • FIGS. 7A and 7B A process of assembling the screw member 10 to the core body 1M having the leg insertion portion 19f having the above structure will be described with reference to FIGS. 7A and 7B.
  • the tip of the leg portion 10f of the screw member 10 is inserted into the first portion 19f1 of the leg insertion portion 19f.
  • the leg portion 10f is stably held in a form of clearance fit with respect to the first portion 19f1.
  • the tip of the leg portion 10f can very smoothly bite into the second portion 19f2. can.
  • the axis of the leg portion 10f can be aligned parallel to the axis of the second portion 19f2 using the first portion 19f1 as a guide. Therefore, as shown in FIG. 7B, there is no possibility that the leg portion 10f of the screw member 10 is screwed into the leg insertion portion 19f in an inclined state. It is desirable that the length of the first portion 19f1 is 3P or more, where P is the pitch of the thread formed on the leg portion 10f. Moreover, it is desirable that the length of the second portion 19f2 is set to 1P or more and 10P or less.
  • the core body 1M can also be attached by being press-fitted into the housing passage portion 56.
  • the outer peripheral surface of the core body 1M and the inner peripheral surface of the accommodation passage portion 56 are in close contact with each other, and no gap is formed.
  • the depth of formation of the head accommodating portion 19h is determined so that the top surface of the head portion 10h of the screw member 10 is flush with the outer peripheral surface of the core body 1M.
  • the outer peripheral surface of the head portion 10h of the screw member 10 may be brought into close contact with the inner peripheral surface of the head accommodating portion 19h.
  • a section including the midpoint G of the central axis line of the liquid channel 3 is a narrowed portion 9 having a cylindrical surface.
  • a pair of enlarged diameter portions 9 ⁇ /b>B having a larger diameter than the narrowed portion 9 are formed in front and rear sections of the narrowed portion 9 .
  • the screw mounting hole 19 is arranged in the constricted portion 9 together with the threaded member 10, and the rectifying member 63 is arranged inside each of the enlarged diameter portions 9B so as to be integrated with the core body 1M.
  • FIG. 12 shows the details of the rectifying member 63.
  • An elastic belt-shaped member such as steel is processed into a serpentine shape so that crests and troughs appear alternately at creases in the direction of the short side. It is formed so as to have a star-shaped cross section by rolling around an axis line parallel to (hereinafter also referred to as a star-shaped rectifying member 63).
  • the star-shaped rectifying member 63 is inserted so that the direction of the short side coincides with the axis of the accommodation passage portion 56, and the outer peripheral edge of the front end face is on the side closer to the inflow side opening 55. It is abutted against the stepped surface 9j.
  • preliminary cavitation treatment (hereinafter referred to as preliminary cavitation treatment) is performed when the liquid flows through the upstream straightening member 63. be.
  • the bubbles generated by this preliminary cavitation treatment can be pulverized by stronger cavitation treatment when flowing through the subsequent cavitation core 1 .
  • the generation density of microbubbles can be further increased.
  • the configuration of the rectifying member 63 is not limited to this. can be arranged as follows.
  • the enlarged diameter portion 9B has a cylindrical surface with a larger diameter than the narrowed portion 9, and is connected to the narrowed portion 9 via a stepped surface 9j.
  • the star-shaped rectifying member 63 is formed to have a diameter larger than the inner diameter of the enlarged diameter portion 9B in a free state, and is press-fitted into the enlarged diameter portion 9B while being elastically contracted in the radial direction about the axis.
  • the front end of the star-shaped rectifying member 63 is in contact with the stepped surface 9j, and the outer peripheral surface of the core body is gripped by the inner peripheral surface of the enlarged diameter portion 9B due to the elastic restoring force in the radial direction.
  • the star-shaped rectifying member 63 is less likely to come off from the core body 1M, and the assembly of the rectifying member 63 and the core body 1M can be attached to the nozzle casing 50 in a stable process.
  • the liquid treatment nozzle 100 is incorporated into the water pipe system 1200 of FIG. 1 in the following procedure. That is, as shown on the left side of FIG. 13, the nut joint 1213a (first threaded joint 1213a: female thread) of the water supply flexible pipe 1213 directly connected to the water stop valve 1211 is loosened, and the flexible pipe 1213 is deformed to A space for installing a nozzle is made between the joint portion 1212 (second screw joint 1212: external thread) on the 1211 side. Next, the cap nut 50 ⁇ /b>C (female thread) of the liquid treatment nozzle 100 is screwed into the second screw joint 1212 .
  • the liquid treatment nozzle 100 has a liquid inflow side on the lower side in FIG. 13, that is, the second side (right side) in FIG. 2, and an outflow side on the upper side in FIG. 13, that is, the first side (left side) in FIG. is “forward”).
  • the type of threaded joint of the piping system to which the liquid treatment nozzle 100 is attached may be reversed from that shown in FIG. ). In such a case, the liquid treatment nozzle 100 must be assembled upside down from that shown in FIG.
  • the direction of assembly of the liquid treatment nozzle 100 to the piping system is either the forward direction shown in the left side of FIG. 14 or the reverse direction shown in the right side of FIG.
  • the flow form of the liquid to the liquid treatment nozzle 100 is rectifying member 63 ⁇ cavitation core 1 ⁇ rectifying member 63 .
  • the rectifying member 63 is integrally attached to the enlarged diameter portion 9B of the core body 1M, the rectifying member 63 and the core body 1M can be attached to the nozzle casing 50 as an integrated assembly when the liquid treatment nozzle 100 is assembled. Can be installed all at once. As a result, simplification of the assembly process of the liquid treatment nozzle 100 can be achieved.
  • the screw member 10 has a thread pitch and root depth of 0.10 mm or more and 0.40 mm or less and a nominal thread diameter M of 1.0 mm or more and 2.0 mm or less.
  • the screw member 10 is a JIS-defined No. 0 class 1 pan head machine screw.
  • a plurality of imaginary screw disposition surfaces orthogonal to the central axis O of the liquid channel 3 are set along the central axis O, and five surfaces LP1 to LP5 in FIG. 3 are set.
  • the screw member 10 described above is arranged such that the longitudinal direction of the leg portion is along each of the screw arrangement surfaces LP1 to LP5.
  • the total number of screw members 10 is 20 (that is, 8 or more), and two or more, four in FIG.
  • the screw members 10 are arranged according to the layout shown in FIGS. 4A and 4B on each of the screw arrangement surfaces LP1 to LP5. Specifically, in any layout, the four screw members 10 on each of the screw arrangement surfaces LP1 to LP5 form a face screw set arranged in a cross shape perpendicular to each other. Each screw member 10 is radially inserted from the outer peripheral surface side of the core body 1M into the leg insertion portion 19f of the screw mounting hole 19 formed in the core body 1M so that the tip of the leg protrudes into the drawn portion 9. ing.
  • FIG. 5A shows the inside of the constricted portion 9 further enlarged, and a main flow area 21 is formed between the threaded member 10 and the inner peripheral surface of the constricted portion 9 .
  • a liquid flow gap 15 is formed at the center of the cross formed by the four threaded members 10 in each throttle portion 9 .
  • the tip surfaces of the four screw members 10 forming the liquid flow gap 15 are formed flat, and the liquid flow gap 15 is formed in a square shape when projected onto a plane perpendicular to the central axis.
  • the area of the liquid flow area (hereinafter also referred to as the total flow cross-sectional area) a in each of the screw arrangement surfaces LP1 to LP5 is the total area inside the outer peripheral edge of the projected area of the liquid flow path (here, in FIG. 1).
  • Area of the circular axial cross section of the constricted portion 9: ⁇ d 2 /4)) where d is the inner diameter, S2 is the projected area of the screw member 10 (four screw members), a S1 ⁇ S2 (Unit: mm 2 ) defined as
  • the total area of the main flow area 21 and the liquid flow gap 15 corresponds to the total flow cross-sectional area a.
  • the total flow cross-sectional area a As shown in FIG.
  • the opening diameters of the inflow side opening 55 and the outflow side opening 54 are larger than the inner diameter of the constricted portion 9 . That is, the opening cross-sectional areas of the inflow-side opening 55 and the outflow-side opening 54 are set larger than the total flow cross-sectional area a.
  • a total flow cross-sectional area a of 3.8 mm 2 or more is ensured on each of the screw arrangement surfaces LP1 to LP5, and the ratio of the liquid flow area to the total cross-sectional area S1 of the liquid flow path (that is, a/S1 ⁇ 100 (% )) is ensured to be 40% or more.
  • the depth h of the trough appearing on the projected outline of the screw member 10 is ensured to be 0.1 mm or more.
  • the valley representing the lowest position of the valley is determined.
  • the number of points (indicated by circles) located inside the reference circle C70 that is, the number of points from the center axis O of the liquid channel 3 in projection onto a plane perpendicular to the center axis O
  • the number of valley points located within 70% of the radius is defined as the number of 70% valley points N70.
  • the 70% valley point area density is defined as the sum of the 70% valley point numbers N70 for all threaded surfaces divided by the total cross-sectional area S1 of the liquid flow path 3 (constricted portion 9).
  • the value of the 70% valley point areal density is ensured to be 1.6/mm 2 or more.
  • the face screw sets shown in FIGS. 4A and 4B are geometrically equivalent, but the angular phases around the central axis when assembled to the core body 1M are shifted from each other by 45°.
  • the first mold surface screw set shown in FIG. 4A and the second mold surface screw set shown in FIG. A layout is formed.
  • the surface distance dp between the adjacent screw arrangement surfaces LP1 to LP5 is, for example, 1.05dh or more and 2M or less, where dh is the outer diameter of the head portion 10h in FIGS. 4A and 4B, and M is the nominal thread diameter of the leg portion 10f. is set to
  • the leg portions of the threaded members 10 on the threaded surfaces LP1 to LP5 adjacent to each other are placed in a positional relationship in which they overlap each other while aligning their longitudinal directions when projected onto a plane perpendicular to the central axis O. can also be placed
  • the face screw set composed of the four screw members 10 arranged in a cross shape overlaps each other on the screw arrangement surfaces LP1 to LP5 (that is, the cross-shaped face screw set). They are arranged in a positional relationship in which the arrangement angle phases around the central axis coincide with each other: hereinafter, such an arrangement is also referred to as "in-phase arrangement").
  • a cavitation treatment portion in which a plurality of face screw sets are arranged in the same phase as shown in FIG. 5B has the advantage of being able to effectively suppress an increase in pressure loss during liquid flow when the number of arranged screw members increases.
  • the cavitation treatment section in which face screw sets with different arrangement angle phases around the central axis are alternately arranged can achieve a 70% valley point area density equivalent to the configuration in FIG.
  • the surface distance dp between the arrangement surfaces LP1 to LP5 is the same as the configuration in FIG. 5B, the pressure loss during liquid flow is slightly increased.
  • the turbulent agitation effect of the liquid is greater than that of the configuration of FIG. 5B, so it is more advantageous for the purpose of dissolving gas into liquid by multiphase flow supply, for example.
  • the liquid treatment nozzle 100 of FIG. (Oxygen concentration is about 8 ppm at 20°C (normal temperature)) will be explained.
  • the water flow flows through the screw in the liquid flow region consisting of the main flow region 21 and the liquid flow gap 15 formed between the screw member 10 and the inner peripheral surface of the constricted portion 9. It passes through while colliding with the member 10 .
  • the cavitation core 1 of FIG. 3 has an in-plane flow area ratio of 40% or more and a total flow cross-sectional area of 3.8 mm 2 or more in each of the screw arrangement surfaces LP1 to LP5, and furthermore, adjacent screw arrangement A space dp between the faces LP1 to LP5 (face thread set) is ensured to be larger than the nominal thread diameter of the screw member 10 used.
  • face screw sets are arranged in series in the direction of the central axis O, the increase in pressure loss of the nozzle can be kept extremely small.
  • the value of the 70% valley point area density which was thought to be about 1.1 pieces / mm 2 as a limit, was increased to 1.6 pieces / mm 2 or more at once while ensuring a sufficient flow velocity. It can be set to a large value.
  • Patent Document 2 the present inventors have found that water subjected to cavitation treatment with the liquid treatment nozzle disclosed in the document has improved permeability to skin, hair, etc., and that the effect of improving permeability is It was suggested that the larger the 70% valley point density of the nozzle, the more significant it becomes.
  • the components of skin and hair are proteins, which are macromolecules, and regarding the improvement of water permeability at the molecular level to structures consisting of such macromolecular networks, microbubbles intervene in water.
  • the physical properties of water especially the collective (statistical) behavior of water, which is a polar molecule, are involved in microbubbles, and the penetration power of water, etc.
  • Water subjected to cavitation treatment with the liquid treatment nozzle 1 described above contains a large amount of nano-range microbubbles with an average diameter of about 100 nm to 300 nm, as in Patent Document 2, when measured by, for example, a laser diffraction particle size meter. It can be confirmed that it is water contained in Most of the microbubbles with the above average diameter, which can be detected by a laser diffraction particle size meter, disappear when stored in a tank or the like after the cavitation treatment and allowed to stand for several minutes, and cannot be detected by a laser diffraction particle size meter with normal sensitivity.
  • the leg insertion portion 19f of FIG. 15 includes a first portion 19f1 having a first inner diameter hd1 including an end portion on the connection side with the head housing portion 19h, and an end portion on the connection side with the liquid flow path 3. and a second portion 19f3 having a second inner diameter hd2 smaller than the second inner diameter hd2.
  • the first inner diameter hd1 of the first portion 19f1 is md ⁇ hd1 ⁇ hd3
  • the leg portion 10f of the threaded member 10 is inserted into the first portion 19f1 with a clearance fit.
  • the second inner diameter hd2 of the second portion 19f3 is md ⁇ mtd ⁇ hd2 ⁇ md is defined to be within the range of
  • the length of the second portion 19f3 is set to 1P or more and 2P or less, where P is the pitch of the thread formed on the leg portion 10f.
  • the leg portion 10f of the screw member 10 is not self-tapping with respect to the second portion 19f3, and as shown on the right side of FIG. It is in the form of
  • FIG. 17 shows another embodiment of the second liquid treatment nozzle of the present invention.
  • the liquid treatment nozzle 200 incorporates a plurality of cavitation cores 1 into the nozzle casing 50 .
  • a space is formed between the outer peripheral surface of the cavitation core 1 and the inner peripheral surface of the housing passage portion 56 of the nozzle casing 50 .
  • the nozzle casing 50 consists of a casing body 50B, a core pressing portion 50A, and a cap nut 50C rotatably fitted to the core pressing portion 50A.
  • the structure of the cavitation core 1 is the same as that shown in FIG. 3, and two (plurality) of cavitation cores 1, 1 are arranged in parallel in the axial direction in the housing passage portion 56 formed in the casing main body 50B. ing. Also, the inner diameter of the accommodation passage portion 56 is set to be larger than twice the outer diameter of the cavitation core 1 .
  • the casing main body 50B is formed with a tool engaging portion 257 consisting of a pair of parallel surfaces by notching the first side end portion of the outer peripheral surface in an offset manner.
  • a plurality of cavitation cores 1 are integrated by fitting assembly plates 201 to both end faces in an arrangement in which the center axes are parallel to form a multi-core assembly 210 .
  • the multi-core assembly 210 is mounted in the housing passage portion 56 of the casing main body 50B in the axial direction, and the outer peripheral edge portion of the first side end face of the core pressing portion 50A is liquid-tight with one of the assembly plates 201, 201 (upper side in the drawing). The close contact prevents the multi-core assembly 210 from coming off. Further, the outer peripheral edge of the other (lower side in the drawing) of the assembly plates 201 and 201 is in close contact with the outer peripheral edge of the first side end of the housing passage portion 56 in a liquid-tight manner.
  • each core fitting portion 213 is composed of a circular counterbore 211 and a liquid flow hole 212 smaller in diameter than the counterbore 211 .
  • a fitting groove 1G extending in the circumferential direction is formed by stepwise notching the outer peripheral edge of each end surface of the core body 1M, and a small diameter portion 1C is formed inside the fitting groove 1G.
  • each cavitation core 1 of the multi-core assembly 210 is fitted into countersinks 211 of the corresponding assembly plate 210 at the small diameter portions 1C at both ends.
  • the liquid flow hole 212 of the assembly plate 201 is set to have an inner diameter corresponding to the enlarged diameter portion 9B of the cavitation cores 1,1.
  • both the first side passage portion 50u of the casing main body 50B and the second side passage portion 50v of the core holding portion 50A have inner peripheral surfaces facing the corresponding assembly plate 201. , tapered surfaces 50ut and 50vt that continuously increase in diameter toward the assembly plate 210 so as to include all the liquid circulation holes 212 .
  • the liquid treatment nozzle 200 causes the liquid to flow from the second side opening 55 into the second side channel portion 50v, so that the liquid flows through the cavitation cores 1 via the enlarged diameter portion 50vt, and flows through the enlarged diameter portion 50ut. After joining, it flows out from the first side opening 54 via the first side channel portion 50u.
  • the cavitation process can be performed on the liquid with a larger flow rate than the liquid processing nozzle 100 of the first embodiment.
  • the dimensions of the male threaded portion of the nozzle-side threaded joint portion 51 and the dimensions of the female threaded portion 52 of the cap nut 50C are both G3/4 dimensions of the parallel screw standard for pipes.
  • the number of cavitation cores 1 incorporated in the multi-core assembly 210 is not limited to two. For example, as shown in FIG. 20, three cavitation cores 1 can be incorporated.
  • the nozzle casing 50 is composed of a flow path adjusting valve 50D, a casing main body 50B', and a core pressing portion 50A, which form an additional functional portion. is worn.
  • the following description will focus mainly on differences from the liquid treatment nozzle of the first embodiment (conceptually common parts may be assigned the same reference numerals and detailed description thereof may be omitted).
  • the flow path adjusting valve 50D has a valve casing 69, and a female threaded portion 71 is formed on the inner peripheral surface of the second side end portion.
  • a male threaded portion 51' is formed on the outer peripheral surface of the first side end portion of the casing body 50B', and is screwed with a female threaded portion 71 of the flow path adjustment valve 50D via a seal ring 70.
  • a first side passage portion 50u1 formed in the casing main body 50B′ communicates with a main valve passage portion 50u2 formed through the valve casing 69.
  • the nozzle side threaded joint portion 51 is formed as a male threaded portion at the first side end portion of the valve casing 69 .
  • a valve body holding part 74 that holds the ball valve body 72 rotatably around the operation axis HA is incorporated in the middle of the main valve flow path part 50u2.
  • a valve body flow path 80 is formed in the ball valve body 72 , and an operation axis HA is set in a direction perpendicular to the axis of the valve body flow path 80 .
  • An operating handle 78 is coupled to the other end of the operating shaft portion 76 so as not to rotate relative to the operating shaft portion 76 .
  • the flow path adjusting valve 50D is not limited to the ball valve as described above. For example, it may be configured as a stop valve that switches the flow path between two states, a fully closed state (blocked state) and a fully open state (open state). good too.
  • the liquid treatment nozzle 400 of FIG. 22 shows an example in which a branch pipe 31 for branching and circulating the liquid from the liquid channel is provided as an additional functional section.
  • the nozzle casing 450 consists of a casing main body 50B', a core pressing portion 50A' and a cap nut 50C'.
  • the cap nut 50C' is rotatably fitted to the first side end of the casing body in the same configuration as in FIG.
  • the nozzle side threaded joint portion 51' is formed as a male threaded portion at the second side end portion of the core pressing portion 50A'.
  • a male threaded portion 97m is formed on the outer peripheral surface of one end of the branch pipe 31, and by screwing with a female threaded portion 97f formed by penetrating the side wall of the casing body 50B', the branch pipe 31 is connected to the first side of the casing body 50B'. It is coupled in a form of communication with the flow path portion 50u.
  • a valve hole 98 is formed through the side wall of the casing main body 50B' on the side opposite to the communication position of the branch pipe 31 with respect to the central axis, and inside the valve hole 98 is an opening on the communication side of the branch pipe 31.
  • An adjustment valve (butterfly valve in this embodiment) 99 for adjusting the amount of liquid distributed to the branch pipe 31 side is attached via a seal ring 99c.
  • the opposite end of the branch pipe 31 is provided with a chemical holding part 33 that receives the inflow of the liquid from the branch pipe 31 and dissolves the chemical into the received liquid.
  • the liquid in the branch pipe 31 into which the liquid medicine from the liquid medicine holding portion 33 is eluted is slowly released and flows out from the connection end of the branch pipe 31 with the casing main body 50B' toward the liquid flow path 3 side in a reverse flow form.
  • the distributed flow rate of the liquid to the branch pipe 31 can be changed.
  • the controlled release outflow amount of the liquid medicine from the liquid holding portion 33 to the first side channel portion 50u increases.
  • Such a liquid treatment nozzle 400 can be installed, for example, as a sanitizer on a pipe that supplies flush water to a toilet bowl (eg, a urinal).
  • the chemical solution is a washing chemical solution for sterilization and urinary calculus removal (for example, a well-known solution in which didecyldimonium chloride, benzalkonium chloride, polyhexamethylene biguanide, dimethicone, etc. are dissolved in water together with a fragrance and a surfactant).
  • a washing chemical solution for sterilization and urinary calculus removal for example, a well-known solution in which didecyldimonium chloride, benzalkonium chloride, polyhexamethylene biguanide, dimethicone, etc. are dissolved in water together with a fragrance and a surfactant.
  • the cleaning water is supplied to the liquid treatment nozzle 400 from the second side opening 55 (on the left side of the drawing), cavitation-treated by the cavitation core 1, and then mixed with the cleaning chemical from the branch pipe 31.
  • the flushing water has an effect of improving permeability due to cavitation, which further improves the detergency of the toilet bowl.
  • the nozzle casing 550 is composed of a casing main body 550B, a core pressing portion 550A and a cap nut 550C, and the second side end portion of the core pressing portion 550A forms part of the liquid flow path 3. Also formed is a tool engagement hole 550v for engaging an assembly tool used when threading the assembly male threaded portion 550d of the core pressing portion 550A to the assembly female threaded portion 550g of the casing main body 550B.
  • the following description will focus mainly on the differences from the liquid processing nozzle of the first embodiment, and the same reference numerals will be given to the conceptually common parts, and detailed description may be omitted.
  • the cap nut 550C is rotatably fitted to the second side end of the core pressing portion 550A.
  • the flange portion 552 forming the first side end portion of the cap nut 550C and the flange portion 551 forming the second side end portion of the core pressing portion 550A are engaged with each other in a form of direct contact.
  • the configuration is such that the ring 58 is omitted.
  • the tool engaging hole 550v has a hexagonal cross-sectional shape in this embodiment, and a hexagonal wrench can be used as a tool.
  • the assembly male screw portion 550d of the core pressing portion 550A and the assembly female screw portion 550g of the casing main body 550B are screwed together, and in this state, the tool engaging portion 57 on the casing main body 550B side and the core pressing portion 550A are engaged.
  • the assembly of the nozzle casing 550 can be completed smoothly and easily by engaging tools with the tool engaging holes 550v and rotating them relative to each other around the axis.
  • the tool engaging hole 550v of the core pressing portion 550A can be reused as part of the liquid flow path 3 after assembly is completed, the structure of the liquid processing nozzle 550 is also simplified.
  • the liquid treatment nozzle 600 of FIG. 24 constitutes one embodiment of the liquid treatment nozzle according to the first aspect of the present invention.
  • a liquid channel 603 is formed therethrough.
  • the liquid channel 603 has an inflow side opening 604 at one end (right side in the drawing) and an outflow side opening 605 at the other end.
  • a narrowed portion 609 having a diameter smaller than that of the opening 605 is formed so as to form a partial section of the liquid channel 603 .
  • the liquid channel 603 has an inflow-side tapered portion 606 on the inflow-side opening 604 side of the narrowed portion 609 , and an outflow-side taper portion 607 on the outflow-side opening 605 side.
  • a threaded member 10 is assembled to the constricted portion 609 so that the distal end side of the leg protrudes into the channel, forming a cavitation processing portion CV.
  • the liquid to be treated is, for example, water (or an aqueous solution in which a desired solute component is dissolved as necessary), but liquids other than water (for example, organic solvents such as alcohol, fossil fuels such as gasoline and light oil, edible oil, etc.) may be used.
  • the liquid treatment nozzle 600 includes a nozzle casing 602 and a cavitation core 1.
  • the liquid treatment nozzle 600 is composed of four main parts: a cavitation core 1, a casing main body 602CA and a core pressing portion 602CB that constitute a nozzle casing 602, and a taper piece 602CP.
  • the cavitation core 1 has a core body 1M and a screw member 10. As shown in FIG.
  • the casing main body 602CA of the nozzle casing 602 has a housing passage portion 651 with both ends opened in the liquid flow direction (the direction of the central axis O).
  • the casing main body 602CA has a female threaded joint portion 616 (inflow side pipe joint portion) that forms the inflow side opening 604, and continues downstream of the female threaded joint portion 616 and gradually expands in the liquid flow direction.
  • An inflow-side tapered portion 606 is formed in a shape of decreasing diameter.
  • a cylindrical surface portion 609B having the same inner diameter as the outflow opening is formed so as to be connected to the outflow opening of the inflow side tapered portion 606 .
  • This cylindrical surface portion 609B forms a part of the throttle portion 609. As shown in FIG.
  • the accommodation passage portion 651 has a diameter larger than that of the cylindrical surface portion 609B, and communicates with the cylindrical surface portion 609B in a form that produces a stepped surface 652 .
  • a female threaded portion 653 for connecting the casing is formed on the downstream side of the accommodation passage portion 651 in the liquid flow direction so as to have a diameter larger than that of the accommodation passage portion 651 so as to form a stepped surface 652 .
  • the core body 1M of the cavitation core 1 is formed a liquid channel 609A having a liquid inlet opening on one end face in the direction of the central axis O and a liquid outlet opening on the other end face.
  • the outer peripheral surface side is press-fitted or gapped with respect to the inner peripheral surface of the accommodation passage portion 651. It is inserted in the direction of the central axis O so as to fit.
  • the core body 1M has a cylindrical outer peripheral surface, and is coaxially inserted into the housing passage portion 651 from the female screw portion 653 side.
  • the arrangement structure of the screw member 10 in the cavitation processing part CV is conceptually almost the same as that shown in FIG. 4A. That is, in the cavitation processing part CV, a plurality of virtual screw arrangement surfaces perpendicular to the central axis O of the liquid channel 3 are set along the central axis O, and two surfaces LP1 and LP2 are set in FIG.
  • the face thread set of FIG. 4A is arranged in phase with the thread placement planes LP1 and LP2.
  • the inner diameter hd of the leg insertion portion 19f of the screw mounting hole 19 satisfies md ⁇ mtd ⁇ hd ⁇ md over the entire length of the leg insertion portion 19f. is defined to be within the range of Therefore, as shown in FIG. 25B, the leg portion 10f of the screw member 10 is mounted in a self-tapping manner over the entire section within the leg insertion portion 19f.
  • the tapered piece 602CP has a cylindrical outer peripheral surface and is inserted into the housing passage portion 651 in the direction of the central axis O so as to be adjacent to the downstream side of the cavitation core 1 .
  • a first tapered portion 607A is formed through the tapered piece 602CP so that both ends thereof are open in the liquid flow direction (the direction of the central axis O).
  • the first taper portion 607A forms a portion of the upstream side of the outflow side taper portion 607, and the opening on the inflow side is formed to have the same inner diameter as the liquid channel 609A of the cavitation core 1, and the opening on the outflow side It is formed in a shape that gradually expands in diameter toward the opening.
  • the core pressing portion 602CB has a female threaded joint portion 617 (outlet side pipe joint portion) that forms the outflow side opening portion 605, and upstream of the female threaded joint portion 617 is the inflow side opening of the core pressing portion 602CB.
  • a forming second tapered portion 607B is formed.
  • the second tapered portion 607B constitutes a part of the downstream side of the outflow side taper portion 607, and is formed so as to gradually decrease in diameter toward the inflow side opening having the same inner diameter as the outflow side opening of the taper piece 602CP.
  • the diameter of the upstream end portion where the opening on the inflow side is located is reduced by a stepped surface 655, and a male threaded portion 656 is formed on the outer peripheral surface thereof to be screwed with the female threaded portion 653 of the casing main body 602CA.
  • the downstream end face of the tapered piece 602CP is restricted from moving downstream in the direction of the central axis O by the upstream end face of the core pressing portion 602CB.
  • the outflow-side tapered portion 607 is formed to have a longer section length in the liquid flow direction than the inflow-side tapered portion 606 .
  • the section length of the outflow side tapered portion 607 is set to be large in this way, the formation of a swirl flow along the inner periphery of the tapered surface becomes remarkable when the liquid is circulated.
  • the dissolved gas precipitated under reduced pressure in the cavitation core 1 grows to a somewhat large bubble, it can be pulverized by being involved in the swirling flow along the outflow side taper portion 607 .
  • FIG. 26 when a soluble gas is introduced from the outside into the flowing liquid, it is possible to improve the dissolution efficiency of the soluble gas by involving it in this swirl flow.
  • the outflow side taper portion 607 can be formed by cutting the inner surface.
  • the length of insertion of the cutting tool in the axial direction can be shortened, and the execution of processing becomes much easier. If it is desired to form the outflow side tapered portion 607 having a longer section length, the tapered piece 602CP can be further divided into two or more pieces.
  • the material of the casing main body 602CA, the core pressing portion 602CB, the tapered piece 602CP, and the core main body 1M is resin such as ABS, nylon, polycarbonate, polyacetal, and PTFE. It is often selected as appropriate depending on the application.
  • FIG. 26 is a cross-sectional view showing a modification in which the liquid treatment nozzle 600 described above is provided with a gas introduction mechanism.
  • the casing main body 602CA is formed with a gas introduction hole 626 that opens to the outer peripheral surface of the casing main body 602CA and communicates with the narrowed portion 609 upstream of the cavitation processing portion CV.
  • a female screw hole 629 is formed in the opening of the gas introduction hole 626 on the outer peripheral surface side of the casing main body 602CA, and a gas introduction joint (not shown) for connecting a gas supply pipe can be attached thereto.
  • the gas introduction hole 626 and the gas introduction joint constitute a gas introduction mechanism, and if a gas supply pipe (not shown) is connected to the gas introduction joint, the gas to be dissolved into the narrowed portion 609 can be easily introduced. can do. For example, by connecting a gas supply pipe from an air compressor (not shown), air can be dissolved in the water to be treated, and the amount of dissolved air required for cavitation can be ensured even in water to be treated lacking dissolved air.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Nozzles (AREA)
  • Domestic Plumbing Installations (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
PCT/JP2022/031967 2020-11-16 2022-08-25 液体処理ノズル Ceased WO2023027136A1 (ja)

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JP7527749B1 (ja) 2023-05-12 2024-08-05 株式会社富士計器 微細気泡水生成器付き洗面台用水栓キット及び洗面台用水栓装置

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