JP2018144018A - Liquid treatment nozzle and core element for liquid treatment nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid treatment nozzle which generates fine air bubbles by a cavitation system, and of which the design versatility is drastically improved by raising mutual independence between a core part and surrounding components, and a core element for the liquid treatment nozzle.SOLUTION: A liquid treatment nozzle 100 is provided with: a nozzle casing 50 with an accommodation passage part 56 in a penetrated form for forming an inflow side opening part 54 on one end, and forming an outflow side opening part 55 on the other end, and in which connection joint parts 51, 52 to a piping system are formed at a formation side end at least of the inflow side opening part 54; and a treatment function part 60 which is arranged at the accommodation passage part 56 of the nozzle casing 50, and constituted as an aggregate of a plurality of constituting elements having individual fluid passages 9 and formed to be interpolated at a predetermined position in the accommodation passage part 56 from the inflow side opening part 54 or the outflow side opening part 55, in which one or a plurality of core elements 1 for performing supersaturation deposition of dissolved gas of liquid to perform fine air bubble generation treatment are incorporated in the treatment function part 60.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a liquid processing nozzle used for generating fine bubbles and a core element for a liquid processing nozzle.

  In recent years, fine bubbles called microbubbles (fine bubbles) or nanobubbles (ultra fine bubbles) have been applied to many applications, and various bubble generation mechanisms have been proposed. The two-phase flow swirling method disclosed in Patent Document 1 is intended to reduce the size by entraining outside air into the swirling flow and forcibly pulverizing it, and has the disadvantage of poor generation efficiency of nanobubbles with a bubble diameter of less than 1 μm. There is.

  On the other hand, a so-called cavitation method is used in which a throttle hole is provided in the water flow path by a venturi or an orifice, and the dissolved air is precipitated as fine bubbles by the pressure reducing effect resulting from Bernoulli's theorem when water passes at a high flow rate. Various microbubble generation mechanisms have been proposed (Patent Documents 2 to 8). In particular, in the methods disclosed in Patent Documents 3 to 8, a screw member is arranged in the middle of the throttle hole, and the water flow is further accelerated by the gap formed between the screw valleys or the opposing screw members. Thus, cavitation efficiency can be improved and nanobubbles can be generated at a higher density. The advantage of this method is that a gas supply mechanism that is a bubble material from the outside is not required, the nozzle is small, and the structure is simple. For example, if there is a supply pipe for a liquid into which fine bubbles are to be introduced, the fine bubble effect can be enjoyed very simply and inexpensively by simply installing a nozzle in-line along the pipe, and the installation space can be reduced.

JP 2008-229516 A JP 2014-147901 A WO2013 / 011570 WO2010 / 055702 publication WO2013 / 012069 JP 2011-240206 A WO2016-178436 WO2016-195116

  The cavitation type fine bubble generator needs to secure the flow velocity of the liquid passing through the threaded part of the nozzle at a high speed sufficient to generate bubbles, and the flow cross-sectional area of the nozzle needs to be set individually according to the liquid flow rate. There is. As a result, if the required flow rate is different, the cross-sectional area of the nozzle and the specification of the screw member that controls the generation of bubbles are also different (see Patent Document 8). For example, in the nozzles disclosed in Patent Documents 4 to 8, a core portion that is a bubble generating portion incorporating a screw is inseparably configured with a nozzle body in which a joint portion for pipe connection is formed. As a result, even if the internal diameter and joint dimensions of piping systems at various installation locations are common due to standards, etc., if the required flow rate is different, the entire nozzle must be configured as a separate nozzle, and parts can be shared. There is a drawback that the design versatility is poor. In addition, even when the total length of the nozzle is restricted due to the space of the installation destination piping, the total length of the front and rear throttle portions must be reviewed even if the length of the core portion does not change. In this case as well, the entire nozzle body has to be individually designed because of the integrated throttle part and core part.

  On the other hand, in the configurations disclosed in Patent Documents 2 and 3, the main body of the nozzle responsible for generating bubbles is formed in a columnar shape, and is installed inside a pipe or an equipment housing (for example, a handgrip part of a shower) as an installation destination. It comes to insert. This configuration is the same in that the front and rear tapered constrictions are formed integrally with the core (the high flow rate channel) where bubbles are generated, although the joint is separated from the nozzle body. There is no change in that the entire nozzle body must be individually designed according to the installation destination.

  The object of the present invention is to increase the mutual independence between the core part responsible for bubble generation and its surrounding components in configuring the liquid processing nozzle responsible for the generation of fine bubbles by the cavitation method, Even when nozzles with different specifications are required depending on the installation space, etc., it is possible to easily share parts, and as a result, the liquid processing nozzle and the core element for the liquid processing nozzle with greatly improved design versatility Is to provide.

The present invention relates to a liquid processing nozzle used by being incorporated in a piping system for circulating a liquid to be processed.
In addition to having a through-passage passage portion that forms an inflow side opening at one end and an outflow side opening at the other end, a connection joint to the piping system is formed at the formation end of the inflow side opening. A nozzle casing;
Arranged as an assembly of a plurality of constituent elements that are arranged in the accommodating passage portion of the nozzle casing and have individual flow passages and are formed so as to be insertable from the inflow side opening portion or the outflow side opening portion into predetermined positions in the accommodation passage portion. A processing function unit. A plurality of constituent elements constituting the aggregate are:
A penetrating liquid flow path is formed with a liquid inlet opening on one end face and a liquid outlet opening on the other end face, and the liquid supplied toward the inflow side opening of the nozzle casing flows out through the liquid flow path. There are a plurality of core bodies incorporated in the processing function part in a positional relationship that allows the liquid to flow out from the opening, and a plurality of troughs that protrude from the inner surface of the liquid flow path and are circumferentially formed on the outer peripheral surface and become high flow velocity parts. A collision portion formed so as to be alternately connected, and by performing a pressure reduction action when the liquid in contact with the collision portion is accelerated in the valley portion, the dissolved gas of the liquid is supersaturated to perform fine bubble generation processing. One or more core elements;
One or more additional elements for pre-treatment or post-treatment of the liquid supplied to the core element;
It is configured to include two or more constituent elements including at least one core element selected from the group consisting of:

  In this invention, the liquid processing nozzle is separately formed into a nozzle casing in which a connection joint to the piping system is formed and a processing function unit responsible for generation of fine bubbles, and is processed into an accommodation passage portion formed inside the casing. The functional part is interpolated. The configuration so far is conceptually common to Patent Documents 2 to 3, but in the present invention, the processing function unit is not configured as a single part, but is formed as an aggregate of a plurality of configuration elements. . The plurality of constituent elements include a collision element and at least one core element that performs a fine bubble generation process by supersaturated deposition of dissolved gas by a pressure reducing action when the liquid in contact with the collision part is accelerated in the valley. It is supposed to be. In other words, the core element is an independent element that can take charge of the bubble generation processing by the cavitation method alone, and the size of the core element is small because only the collision part arranged in the liquid flow path is responsible for the generation of fine bubbles. Also, it can be easily inserted into the nozzle casing in which the connecting joint portion is formed.

  The remaining constituent elements are constituted by additional elements that perform pre-processing or post-processing of liquid before and after the core element, or by another core element. Accordingly, by forming the remaining elements of the processing function unit as independent constituent elements with one core element as an axis, nozzles having different specifications are required according to the liquid flow rate of the installation destination, the installation space, and the like. Even in such a case, it is possible to cope with the design by adding / deleting / replacement of the constituent elements to / from the nozzle casing, and parts can be easily shared. This realizes a liquid processing nozzle with greatly improved design versatility.

  In addition, the processing function part, in particular the core element, that has been inseparably formed with the nozzle casing in the past is separated from the nozzle casing, so that the shape of the nozzle casing is greatly simplified and the manufacturing becomes much easier. On the other hand, the core element can be manufactured on a separate line from the nozzle without being restricted by the shape of the nozzle casing, and the manufacturing efficiency can be increased.

  The processing function unit is configured so that when the assembly is constructed in the housing passage portion, the shape of each constituent element is set so that the outer peripheral surface of the entire assembly is in close contact with the inner peripheral surface of the housing passage portion or a gap fit. Can be determined. Since the outer peripheral surface of the entire assembly is in close contact with the accommodation passage portion of the nozzle casing or fitted into a gap, the liquid flow in the processing function portion hardly bypasses the gap with the nozzle casing, and the liquid flow path of the core element I can guide you without any trouble. As a result, the processing function part can be assembled to the nozzle casing very easily, and the seal and bonding such as an O-ring for sealing the gap are not required, and the structure can be simplified.

  The assembly that forms the processing function unit can be configured to include a plurality of core elements that perform microbubble generation processing independently of each other. Improvement of the contact efficiency between the liquid and the collision part can be easily realized by increasing the number of core elements. In addition, liquid processing nozzles with different fine bubble generation efficiencies can be easily realized by changing the number of core elements.

  The assembly constituting the processing function unit may include a flow adjusting element that adjusts the flow of liquid on the upstream side or the downstream side of the core element as an additional element. By providing such a flow adjustment element, it is possible to more appropriately perform the bubble generation process of the liquid passing through the core element, and according to the content of the desired flow adjustment process, the flow adjustment element for the core element It is possible to easily and freely change the design combination. For example, even when a design variation relating only to the function of the flow adjustment element is required, it is possible to easily cope with the configuration by replacing only the flow adjustment element while keeping the configuration of the core element.

Examples of the flow adjustment element include the following.
An inflow side flow restricting element that gradually reduces the flow of liquid flowing into the core element upstream of the core element while increasing the flow velocity while suppressing pressure loss.
An outflow side flow restricting (expanding) element that gradually reduces the flow velocity while suppressing pressure loss by gradually expanding the flow of liquid flowing out of the core element to the downstream side of the core element.
-A rectifying element arranged upstream or downstream of the core element.

  Further, the assembly constituting the processing function unit can include a gas mixing element that mixes the gas supplied from the gas source outside the nozzle casing with the liquid flowing into the core element as the additional element. By providing such a gas mixing element, a mixed phase flow of liquid and gas can be supplied to the core element, and the gas can be efficiently dissolved by entraining the gas phase in the cavitation turbulent flow generated in the core element. Further, not only liquid dissolved gas but also mixed gas can be used as a raw material for fine bubbles, and the generation efficiency of fine bubbles can be further increased. According to the present invention, simply by replacing the gas mixing element, it is possible to easily cope with the design according to the specifications of the desired gas dissolution function (for example, the type of gas and the gas supply flow rate).

  Various arrangement relations of the constituent elements in the assembly forming the processing function section can be selected. For example, a plurality of constituent elements can be arranged adjacent to each other in the flow direction in the accommodating passage section. is there. If it does in this way, a constituent element will be sequentially arranged in the accommodation passage part of a nozzle casing in the form matched with the order of the liquid processing (fine bubble generation processing, flow adjustment processing, gas mixing processing, etc.) which should be performed in the flow direction. A liquid treatment nozzle can be easily constructed only by this. In addition, it is easy to select constituent elements in accordance with design requirements and constraints.

  On the other hand, a plurality of constituent elements can be arranged in parallel in a plane perpendicular to the liquid flow direction. This is when there is a demand to provide a plurality of core elements in parallel to increase the sink flow rate of the liquid to be treated with fine bubbles, or to create a bypass flow that does not finely treat the bubbles (that is, bypasses the core elements). It is beneficial. In the former case, the processing function part includes a core holder member that is inserted into the accommodation passage part of the nozzle casing and has a plurality of core element mounting holes provided in a penetrating manner in a plane orthogonal to the liquid flow direction. A plurality of core elements as elements can be configured to be mounted in the core element mounting holes of the core holder member. Also, if you want to form multiple sets of liquid flow paths for generating and generating fine bubbles in a single nozzle casing, simply create multiple core elements and attach them to the core holder member to freely adjust the number of liquid flow paths to various numbers. Layout is possible, and the core elements can be shared between various design aspects. Furthermore, when the collision part is a screw member that is screwed into the liquid flow path from the outer peripheral surface side of the core body, if the part corresponding to the core holder member is made integral as a part of the core body from the beginning, Even if it becomes impossible to configure due to interference between the members, as long as the individual core elements that are in a simpler form can be configured, the core holder member is not affected by the screw member and can be easily realized. The design is also simplified.

  The nozzle casing can be configured as a metal pipe member in which threaded joint portions as connecting joint portions are formed at both ends. Thereby, the flow path of a metal piping member can be diverted as an accommodation passage part of a constituent element. In addition, a liquid processing nozzle can be easily manufactured simply by mounting a constituent element from the opening of the piping member into the accommodating passage portion, and the obtained liquid processing nozzle is a pipe to be installed by using a screw joint portion of the nozzle casing. Can be easily mounted on top.

  When arranging a plurality of constituent elements in a form adjacent to each other in the flow direction in the accommodating passage portion, the assembly constituting the processing function unit is configured such that the plurality of constituent elements include the inflow side opening or the outflow side opening of the nozzle casing. It can be formed in a shape that can be sequentially inserted into the accommodation passage portion from the same end side. Accordingly, the liquid processing nozzle can be easily manufactured by simply inserting the constituent elements sequentially from the opening on one side of the nozzle casing, and the liquid processing sequence can be easily set or changed in design according to the order of insertion.

  In this case, a stepped surface is formed at the intermediate position of the accommodating passage portion so as to have a large diameter on the insertion side of the component element, and the liquid processing function unit is determined in advance for the component element for constructing the liquid processing function unit. It is possible to employ a configuration in which the outer peripheral edge portion of the object is disposed so as to abut against the stepped surface, and the remaining object is stacked and disposed directly or indirectly through another member. With this configuration, the constituent elements are stacked in the accommodating passage portion, and the insertion position in the nozzle casing is regulated by the stepped surface with respect to the one positioned on the insertion side head of the stacked body. As a result, since the remaining constituent elements are sequentially restricted by the inserted leading constituent elements, the assembly efficiency and positioning accuracy of the entire liquid processing function section in the nozzle casing can be improved. At this time, by configuring each component element so as to fit into the accommodation passage portion, even if the insertion sequence of the component elements is wrong, removal from the nozzle casing and remounting can be easily performed. Can do.

  Even in the configuration in which the constituent elements are sequentially inserted into the receiving passage portion from the same end side forming the inflow side opening portion or the outflow side opening portion of the nozzle casing as described above, the additional element is disposed upstream or downstream of the core element. Thus, it can be configured as a flow adjusting element for adjusting the flow of the liquid. For example, such a flow control element is configured as a flow restricting element that is arranged on the upstream side or the downstream side of the core element and whose flow cross-sectional area gradually decreases toward the liquid inlet or the liquid outlet of the core element. be able to.

  Moreover, the aggregate | assembly which makes a process function part shall contain the several core element laminated | stacked via the spacer member which has a direct flow path or a through-flow channel mutually. By laminating and arranging a plurality of core elements in the flow direction, the liquid is repeatedly subjected to fine bubble generation processing by the plurality of core elements in the processing function unit, and the bubble generation efficiency can be further increased. The liquid passing through the core element has a reduced pressure level due to a decrease in flow velocity, and bubble deposition and growth due to cavitation are slowed down. For example, if a spacer member having a larger flow cross-sectional area than the liquid flow path of the core element is inserted, the growth of bubbles generated in the upstream core element is guided to the next core element while being blunted at the position of the spacer member. And the generation efficiency of bubbles having a smaller diameter can be increased. On the other hand, when a plurality of gas mixing elements and core elements arranged downstream thereof are arranged adjacent to each other, gas mixing and dissolution or microbubble formation in the core elements can be performed at once with a single pass on the liquid distribution pipe. Multiple stages can be implemented, and the gas dissolution efficiency or the microbubble generation efficiency can be dramatically increased.

  Further, the plurality of core elements can be attached to the accommodating passage portion so that the protruding positions of the collision portions on the inner peripheral surface of the liquid flow path are different from each other. In this way, the phase of the protruding position of the collision part in the inner circumferential direction of the liquid flow path is different between the core elements arranged at different positions in the flow direction, and the liquid flow is at the same position with respect to the collision part. No longer hits continuously. As a result, it is possible to suppress an increase in pressure loss toward the downstream side, so even when a large number of collision parts are mounted on the processing function part, it is possible to suppress a decrease in the flow velocity, and the fine bubble generation efficiency corresponding to the number of collision parts Can be achieved. Specifically, for example, the angular phase on the inner peripheral surface of the liquid flow path at the protruding position of the collision portion is set at a predetermined angular interval from the upstream side to the downstream side of the plurality of core elements. It can arrange | position so that it may change sequentially.

  In the above configuration, the passage side engaging portion formed at a certain angular position on the inner peripheral surface of the accommodating passage portion of the nozzle casing is formed, while the passage side is formed on the outer peripheral surface of the core body of the plurality of core elements. A configuration in which a core-side engaging portion that engages with the engaging portion is formed, and the angular position on the inner peripheral surface of the liquid flow path of the protruding position of the collision portion of each core element is changed with reference to the core-side engaging portion. Can be adopted. If it does in this way, the angle phase of a collision part can be easily aligned in a desired positional relationship between a plurality of core elements, and an assembly becomes easy.

  It is easy to form the inner peripheral surface of the housing passage portion of the nozzle casing by drilling or rotary cutting. In this case, it is desirable that the nozzle body of the core element is formed in a columnar shape having an outer peripheral surface that can be fitted into the cylindrical surface-like accommodation passage portion. In this case, the core body of the core element is formed in a cylindrical shape in which the liquid flow path is formed in a direction parallel to the axis, and the collision portion is screwed from the outer peripheral surface of the core body toward the liquid flow path. The tip portion can be formed by a screw member that protrudes from the inner peripheral surface of the liquid flow path to form a collision portion. On the other hand, the core main body can also be formed by resin molding. In this case, the collision portion can be integrated with the core main body by insert molding of metal or ceramic.

  Next, a pair of liquid flow paths that form a cylindrical inner peripheral surface with respect to the core main body are positioned symmetrically with respect to the cross-sectional center of the core main body on a projection onto a plane orthogonal to the axis of the core main body. In addition to forming the relationship, when the cross-sectional inner diameter of the liquid flow path is D and the center-to-center distance is L, | LD− / D × 100 is formed so as to be close to each other or overlap so that the value is 10% or less. Can do. When providing a pair of liquid flow paths in this way, if the distance between the cross-sectional centers of both is too far, the bulkhead portion of the core body that prevents liquid flow is formed between the flow paths, and it is arranged at a position close to this. The flow velocity of the liquid passing through the provided collision part is lowered by the collision detour to the partition wall part, which leads to the deterioration of the fine bubble generation efficiency. Therefore, it is desirable to arrange the two liquid flow paths as close as possible. The condition that the value of | LD− / D × 100 is 10% or less gives an indication of the “proximity”. In addition, since a part of two liquid flow paths overlap and the flow path is integrated, the partition wall portion is not formed. Therefore, the flow loss of the liquid passing through the collision part close to the integrated position is greatly reduced. As a result, the differential bubble generation efficiency is further increased. At this time, by extending the concept using the extension at the overlapping position of the inner peripheral edge of the liquid flow path, the value of L−D takes a negative value.

  In the above configuration, the screw member with respect to the liquid flow channel sandwiches the cross-sectional center of the liquid flow channel in a direction inclined by 45 ° to the first side with respect to a reference line connecting the cross-sectional center points of the liquid flow channel in the projection. And a total of four screw member pairs that are opposed to each other across the center of the cross section of the liquid channel in a direction inclined 45 ° to the second side opposite to the first side, They can be arranged in a cross shape. With this layout, the screw member screwed into the core body toward one liquid flow channel is prevented from being screwed across the other liquid flow channel, and as many as four screw members are provided for each liquid flow channel. It can arrange | position and can raise the generation | occurrence | production efficiency of a fine bubble significantly.

  It is the leg portion of the screw member that protrudes into the liquid flow path to make the collision portion, but the screw head is formed larger in diameter than the leg portion, so that the pair of liquid flow paths are adjacent to each other. If the leg length is too small, a part of the head of the screw member arranged on the side (region where the constriction is formed) is exposed to the inner peripheral surface of the adjacent liquid channel. If the exposed amount of the head becomes too large, it becomes a pressure loss factor for the liquid flow, leading to a reduction in the generation efficiency of fine bubbles. Therefore, each screw member pair is a first screw member that is arranged on the far side from the center of the cross section of the liquid flow path in the screw axis direction to the outer peripheral edge of the core body, and a member that is arranged on the far side. As the second screw member, the length of the screw leg portion is set so that the head portion of the first screw member is inside the outline of the core body, while the second screw member is the center of the cross section of the core body. When a reference circle is drawn with the same diameter as the cross section of the liquid flow path, the head is placed in a region located between the reference circle and the cross-sectional outline of the core body. By comprising in this way, the exposure to the liquid flow path internal peripheral surface of the head of a screw member can be suppressed, and said problem can be eliminated. At this time, the protruding leg portion length of the second screw member having a large distance from the outer peripheral surface of the core body is set to be larger than the first screw member (the protruding portion length of the leg portion) in order to fit the head in the region. It is geometrically essential. Of course, it is more desirable that the head of the second screw member is not exposed to the adjacent liquid flow path portion. In this case, the leg length is adjusted so as to be positioned outside the inner peripheral edge of the cross section of the liquid flow path on the side to which the second screw member does not belong.

In said structure, the outer diameter dimension of the core main body of a core element will be controlled by the leg part length of a 1st screw member. At that time, to reduce the outer diameter of the core body,
(1) bringing the head of the first screw member as close as possible to the outer peripheral surface of the core body;
(2) The embedment length of the leg base end portion with respect to the core body of the first screw member is set as small as possible within a range in which the protrusion support strength of the screw member with respect to the liquid channel can be ensured;
Is the point.
As for (1), in the above projection, the first screw member is located at the outermost portion of the head outline outside the virtual circle that is 90% (preferably 95%) of the outer diameter of the core body with respect to the cross-sectional center of the core body. It is desirable that the leg length is adjusted so that the outer edge is located. Regarding (2), the leg base end side of the first screw member is embedded in the core body within a range of 20% to 60% (preferably 30% to 50%) of the entire length of the leg. It is desirable that the length of the portion is adjusted (the length of the embedded portion of the leg portion is defined as the length of the central axis of the embedded portion). The core element configured in this manner can reduce the outer dimensions of the core body to a level close to the geometric limit. As a result, even when the pipe joint member is a nozzle casing, the flow path (accommodating the inner diameter) is small. It can be easily accommodated in the passage portion).

The core element for a liquid processing nozzle according to the present invention includes a core main body in which a liquid passage having a penetrating shape in which a liquid inlet is opened on one end face and a liquid outlet is opened on the other end face, and an inner surface of the liquid passage And a collision portion formed so that a plurality of crests in the circumferential direction and a trough portion serving as a high flow velocity portion are alternately connected to the outer peripheral surface, and the liquid in contact with the collision portion increases in the trough portion. A core element for a liquid processing nozzle that performs a process for generating fine bubbles by supersaturated precipitation of a dissolved gas of the liquid by a pressure reducing action when it is fast,
The core body is formed in a cylindrical shape in which a liquid flow path is formed in a direction parallel to the axis, the collision portion is screwed from the outer peripheral surface of the core body toward the liquid flow path, and the tip portion is a liquid flow path It is formed by a screw member that protrudes from the inner peripheral surface and forms a collision part,
A pair of liquid flow paths that form a cylindrical inner peripheral surface with respect to the core body are symmetrical with respect to the center of the cross section of the core body when projected onto a plane orthogonal to the axis of the core body. In addition, when the cross-sectional inner diameter of the liquid channel is D and the center-to-center distance is L, the liquid channel is formed so as to be close or overlapped so that the value of | LD− / D × 100 is 10% or less. On the other hand, the screw member is a reference line connecting between the cross-sectional center points of the liquid flow path in the projection, and a pair of screw members facing each other across the cross-sectional center of the liquid flow path in a direction inclined by 45 ° to the first side; A total of four screw members that are opposed to each other across the center of the cross section of the liquid channel in a direction inclined by 45 ° to the second side opposite to the first side are arranged in a cross shape. , Each screw member pair is the center of the cross section of the liquid channel in the screw axis direction The first screw member is arranged on the side closer to the outer peripheral edge of the core body, the second screw member is arranged on the far side, and the head of the first screw member is the outline of the core body. While the length of the screw leg is set so as to fit in the inner region, the second screw member draws a reference circle with the same diameter as the cross section of the liquid flow path with respect to the cross-sectional center of the core body, The leg portion length is set to be larger than that of the first screw member so that the head portion fits in a region located between the reference circle and the cross-sectional outline of the core body.

  Since the details of the operation and effect of the present invention have already been described in the section of “Means for Solving the Problems”, they will not be repeated here.

  The perspective view which shows the example of the assembly to the water supply piping of the liquid processing nozzle of this invention.   The front view of the liquid processing nozzle of this invention, and its sectional drawing.   FIG. 3 is a detailed view of a core element used in the liquid processing nozzle of FIG. 2.   The detailed view which shows the state in a liquid flow path at the time of comprising a collision part with an external thread member.   The figure explaining arrangement | positioning of the flow direction of the screw member in the core element of FIG.   Detailed view of the flow restriction element.   Detailed view of the rectifying element.   Explanatory drawing which shows the assembly process of the liquid processing nozzle of FIG.   Explanatory drawing following FIG.   The figure explaining the assembly | attachment process of the liquid processing nozzle with respect to the piping system of FIG.   FIG. 4 is a detailed view showing a modification of the core element in FIG. 3.   Sectional drawing which shows the modification which provided the flow expansion element in the liquid outflow side in the liquid processing nozzle of FIG.   Sectional drawing which shows the modification which added the core element to the flow direction in the liquid processing nozzle of FIG.   Sectional drawing which shows the example of the liquid processing nozzle incorporating the gas mixing element.   The schematic diagram which shows the example which applies the liquid processing nozzle of FIG. 14 to a gas dissolving apparatus.   The figure which shows the example of the core element which formed only one liquid flow path.   Explanatory drawing which shows the example which laminates and arrange | positions the several core element from which the protrusion position of a collision part differs.   Explanatory drawing which shows the example which uses many core elements more than FIG.   The projection figure which shows the layout of the screw member when the core element of FIG. 18 is laminated | stacked.   The figure which shows an example of the process function part which integrated the several core element in the core holder member.   Sectional drawing which shows the example of the liquid processing nozzle incorporating the processing function part of FIG.   Sectional drawing which shows the core element which formed the engagement collar part in the outer peripheral edge part of the end surface of a core main body in the state integrated in the nozzle casing.   FIG. 23 is a cross-sectional view showing a modification in which the core element in which the engagement flange portion is formed is also mounted on the opposite side of the nozzle casing in the embodiment of FIG.   Sectional drawing which shows embodiment which incorporated the core element of FIG. 1 in the nozzle casing independently.   Sectional drawing which shows embodiment which uses the nozzle casing of an elbow form.   Sectional drawing which shows the reference example which incorporated the screw member directly in the socket-shaped nozzle main body.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a perspective view showing an example of a water pipe system incorporating the liquid treatment nozzle of the present invention. In this water supply and piping system 200, a cold water supply unit 203 directly connected to a water supply and a hot water supply unit 204 connected to a water heater (not shown) are connected to a hot water mixing plug 201 via a stop cock 211 and a piping system 205, respectively. Is done. The hot water mixing tap 201 is a known configuration that mixes cold water from the cold water supply unit 203 and hot water from the hot water supply unit 204 at a mixing ratio and flow rate according to the operation state of the lever 202 and flows out from the outlet 201. belongs to. The piping systems 205 and 206 have the same configuration, and the one of the present invention is provided between the outflow side joint portion (the male screw joint portion 211 (FIG. 10) in this embodiment) of the water stop cock 211 and the water supply flexible piping 213. The liquid processing nozzle 100 according to the embodiment is incorporated. The liquid processing nozzle 100 may be provided only on either the cold water supply unit 203 or the hot water supply unit 204, for example, on the cold water supply unit 203 side.

FIG. 2 shows the liquid processing nozzle taken out and enlarged.
The liquid processing nozzle 100 includes a nozzle casing 50 having a penetrating accommodation passage portion 56 in which an inflow side opening 54 is formed at one end and an outflow side opening 55 is formed at the other end. Connection joint portions 51 and 52 to the piping systems 205 to 206 in FIG. 1 are formed at the formation side end of the inflow side opening 54 of the nozzle casing 50. The nozzle casing 50 is a metal piping member, the inflow side connection joint portion 52 is a female screw joint portion having a tool engagement portion 53 formed on the outer peripheral surface, and the outflow side connection joint portion 51 is a male screw joint. (Each embodiment is a G1 / 2 or Rc1 / 2 piping joint).

  In the present embodiment, the nozzle casing 50 is composed of two parts: a main body part 50b on the outflow side formed in a cylindrical shape, and a pressing member 50a on the inflow side in which a tool engagement part 53 is formed on the outer peripheral surface. An internal thread portion 50c is formed on the inner peripheral surface of the inflow side opening of the main body portion 50b. On the other hand, a male screw portion 50d is formed on the outer peripheral surface of the outlet side end portion of the pressing member 50a, and an O-ring 50e is fitted at the base end position. The outer peripheral surface of the base end portion of the male screw portion 50d into which the O-ring 50e is fitted and the inner peripheral surface of the open end side of the female screw portion 50c of the main body portion 50b are not threaded, and the O-ring 50e is in the position. The gap amount is adjusted so that it is compressed in the radial direction. Further, the screw length of the female screw portion 50c and the male screw portion 50d is set so that the end edge of the tool engaging portion 53 overlaps the end edge of the main body portion 50b by tightening the holding member 50a to the main body portion 50b. Therefore, as shown in the upper part of FIG. 2, it is devised so that it looks like an integral piping member. The female screw portion 50c and the male screw portion 50d are joined by an adhesive or a brazing material.

  The main body 50b is formed with an accommodation passage 56 that penetrates in the axial direction from the inflow side opening toward the outflow side opening. In this embodiment, the accommodating passage portion 56 is divided into three cylindrical inner peripheral surface sections having different inner diameters in such a manner that the diameter is reduced in two steps from the inflow side to the outflow side via the two stepped surfaces 56a and 56b. ing. The accommodating passage portion 56 has an individual flow path, and is inserted into the accommodating passage portion 56, and is configured as an assembly of a plurality of constituent elements 61, 1, 63 having individual flow passages. The processed processing function unit 60 is accommodated. The constituent elements forming the processing function part 60 are specifically the flow restricting element 61, the core element 1 and the rectifying element 63 from the inflow side, and are stacked in this order in the axial direction in the accommodating passage part 56. . The core element 1 bears the main part of the fine bubble generation process.

  FIG. 3 shows details of the core element 1. The core element 1 includes a core body 2 and collision portions 10A and 10B (hereinafter, when the collision portions 10A and 10B are collectively referred to as a collision portion 10). The core body 2 is formed in a columnar shape, and a penetrating liquid flow path 9 is formed which opens a liquid inlet 4 on one end face and opens a liquid outlet 5 on the other end face. In this embodiment, two cores 2 are formed adjacent to each other so as to partially overlap each other with the same inner diameter so that the liquid flow path 9 forming the inner circumferential surface of the cylinder is an axis object with respect to the central axis. FIG. 4 is an enlarged view when one side of the liquid flow path 9 is viewed from the side, and the collision part 10 is arranged such that a plurality of crests 11 in the circumferential direction and troughs 12 serving as high flow velocity parts are alternately connected to the outer peripheral surface. Is formed.

  In this embodiment, the collision part 10 is a screw member (hereinafter also referred to as “screw member 10”) whose leg end side protrudes into the liquid flow path 9, and as a result, a plurality of turns formed in the collision part 10. The mountain portion 11 is integrally formed in a spiral shape. The material of the core body 2 is, for example, a resin such as ABS (acrylonitrile butadiene styrene), nylon, polycarbonate, polyacetal, PTFE (polytetrafluoroethylene), Duracon (trade name), or a metal such as stainless steel or brass, Ceramics such as alumina may be used. The screw member 10 is made of a metal such as stainless steel or a ceramic such as alumina or quartz. In addition, the crest part of the collision part 10 is not restricted to a helical thread, and may be a plurality of protruding ridge parts formed adjacent to each other, but the details are as described in Patent Documents 7 and 8. There will be no explanation.

  Each set of the collision portions 10 formed in the liquid flow path 9 is screwed so that the front end protrudes into the liquid flow path 9 from the outer peripheral surface side of the wall portion in the screw hole 19 formed in the core body 2. It is formed by four screw members. The screw hole 19 and the screw member 10 are set and fixed by an adhesive or the like, and a main flow region 21 is formed between the screw member (impact portion) 10 and the inner peripheral surface of the liquid flow path 9. In each liquid channel 9, a liquid circulation gap 15 is formed at the center position of the cross formed by the four collision portions 10. The front end surfaces of the four collision portions 10 forming the liquid flow gap 15 are formed flat, and the liquid flow gap 15 is formed in a square shape in the above-described projection.

Then, the total area of the peripheral edge inside the liquid flow channel 9, herein, (when the inner diameter was d, πd ^2/4) 2 two of the projected area of the circular shaft cross-section of the liquid flow path 9 in FIG. 3 the sum of S1, The projected area of the collision part 10 (four screw members) is S2, and the total flow sectional area St of the processing core part is
St = S1-S2 (unit: mm ² )
Is defined as 2.5 mm ² or more (10 mm ² or less). In the present embodiment, the total area of the main flow region 21 and the liquid flow gap 15 shown in FIG. 4 (the sum between the two liquid flow paths 9) corresponds to the total flow cross-sectional area St. Further, the depth h of the trough 12 of the screw member (impact portion) 10 is ensured to be 0.2 mm or more. The liquid that has come into contact with the collision part 10 is subjected to a pressure reduction action when it is accelerated in the valley part 11, so that the dissolved gas of the liquid is supersaturated to perform fine bubble generation processing. A screw member 10 having a JIS coarse pitch of M1.0 or more and M2.0 or less is used, and an effective valley point density in the liquid flow path 9 defined in Patent Document 8 is secured at least 1.5 pieces / mm ^2. Has been. Further, the inner diameter of the liquid channel 9 is adjusted to 2 mm or more and 7 mm or less.

  Returning to FIG. 3, the set of collision portions formed in each of the liquid flow paths 9 is formed by four screw members 10 that are screwed so that the tip protrudes into the liquid flow path 9 from the outer peripheral surface side of the core body 2. Has been. As shown by a broken line in the figure, the screw member 10 is screwed into a screw hole 19 formed through the wall portion of the core body 2, and the screw head 19 supports the lower surface of the screw head in the middle of the screw thrust direction. A stepped surface 19r is formed (the screw hole 19 has a thread formed only in a portion located on the liquid flow path 9 side with respect to the stepped surface 19r). The stepped surface 19r is formed at the position where the screw leg 10 protruding into the liquid flow path 9 when the screw member 10 is screwed (that is, the length of the collision part) forms the liquid flow gap 15. It has been adjusted to be appropriate.

  Further, in order to avoid the interference of the screw member 10 between the plurality of liquid flow paths 9, the set of four screw members 10 incorporated in each liquid flow path 9 is arranged between the liquid flow paths 9 in the axial direction. They are arranged at positions shifted from each other. The plurality of screw members 10 </ b> A and 10 </ b> B in the same liquid flow path 9 are arranged at positions shifted from each other in the axial direction (flow direction) of the liquid flow path 9. Specifically, in each liquid flow path 9, screw member pairs 10 </ b> A, 10 </ b> A and 10 </ b> B, 10 </ b> B arranged at positions orthogonal to each other on the same plane are arranged at different positions in the flow direction. The four screw members at the positions of the AA cross section and the BB cross section of the core main body 2 in the drawing, and the four screw members at the CC cross section and the DD cross section positions are the center axis liquid channel 9. By projecting onto a plane perpendicular to the axis, the liquid channels are arranged so as to form a cross shape.

Next, the liquid channel 9 is a throttle hole defined by L / de, where de is the diameter of a circle equivalent to the sum of the axial sectional areas of the liquid channels 9 and L is the length of the liquid channel 9. The aspect ratio is set to 3.5 or less (in the case where the inner diameters of the two liquid channels 9 are different from each other (d1, d2), the throttle hole aspect ratio is L / (d1 ² + d2 ² ). ^1/2 ). In the projection onto the plane orthogonal to the axis O of the core body 2, the inner peripheral edges of the plurality of liquid flow paths 9 from the reference point (projection point of the axis) D <b> 1 defined at the center position of the projection area of the core body 2. The distance T (including the extension of the two liquid channels 9 and 9 to the overlapping region) is set to be smaller than the inner diameter D of the liquid channel 9 (a negative value in FIG. 3). ) The throttle hole displacement T is desirably ½ or less of the inner diameter D of the liquid flow path 9. Further, in the same projection, when the area of the circumscribed circle with respect to the inner peripheral edges of the plurality of liquid channels 9 is St and the total area of the projected regions of the liquid channels 9 is Sr, the aperture defined by K≡Sr / St The hole aggregation rate K is secured to 0.2 or more.

  Further, as shown in FIG. 5, the length of the section located downstream of the collision portion 10 of the liquid flow path 9 (hereinafter referred to as the remaining section) is Lp (average value of Lp2 to Lp4), and the liquid flow path 9 The remaining section aspect ratio defined by Lp / de is set to 1.0 or less, where de is the diameter of the circle equivalent to the sum of the axial sectional areas. In FIG. 5, the length of the remaining section is zero with respect to the screw member 10A located on the most downstream side. However, when the remaining section has a length Lp1 that is not zero with respect to the screw member 10A, the remaining section length Lp is described above. Is an average value of Lp1 to Lp4 (see Patent Document 7).

  Returning to FIG. 2, a flow restricting element 61 is arranged on the upstream side of the core element 1 as an additional element. FIG. 6 shows the details of the flow restricting element 61, which is formed in a cylindrical shape having the same outer diameter as the core element 1. The inner peripheral surface has a diameter on the end face side adjacent to the core element 1 as shown in FIG. The taper surface is small (the inner peripheral surface may be reduced in a staircase shape). The core element 1 and the flow restricting element 61 are in a cylindrical surface shape positioned on the upstream side of the stepped surface 56a of the housing passage portion 56 with respect to the main body portion 50b of the nozzle casing 50 in a stacked state. It arrange | positions so that it may become a clearance fitting form in the area, and the front-end surface outer periphery of the core element 1 located in the head of the laminated body is stopped by the stepped surface 56a.

  On the other hand, a rectifying element 63 is laminated and disposed as an additional element on the downstream side of the core element 1. FIG. 7 shows the details of the rectifying element 63. An elastic belt-like member such as steel is processed into a folded shape so that peaks and troughs appear alternately at the fold in the short side direction, and the short side and It is formed so as to have a star-shaped plane shape by rounding around parallel axes. As shown in FIG. 2, the rectifying element 63 is inserted in a direction in which the short side direction coincides with the axis of the accommodation passage portion 56, and the stepped surface on the side near the outflow side opening 55 with the outer peripheral edge of the front end surface It is stopped by 56b. In the present embodiment, two rectifying elements 63 are mounted in the nozzle casing 50 (main body portion 50b) in a state of being stacked via an O-ring 63a.

  Furthermore, in this embodiment, the strainer 62 with packing is used as a filtering member for blocking the inflow of foreign matter or the like on the stepped surface appearing in the outer peripheral region of the bottom of the inner diameter enlarged portion of the main body portion 50b where the female screw portion 50c is formed. It is inset. The strainer 62 with packing is prevented from coming off from the main body part 50b together with the processing function part 60 on the downstream side by screwing the male screw part 50d of the pressing member 50a to the female screw part 50c of the main body part 50b.

  Hereinafter, a method of using the liquid processing nozzle 100 will be described. By operating the lever 202 in the water supply piping system 200 of FIG. 1, the cold water from the cold water supply unit 203 and the hot water from the hot water supply unit 204 are brought into the operation state of the mixing plug 201 through the piping systems 205 and 206, respectively. It flows out from the outlet 201a while being mixed at a corresponding mixing ratio and flow rate. On the way, hot water and cold water each pass through the liquid processing nozzle 100 of the present invention. Both cold water and hot water pass through the liquid processing nozzle 100, and tap water is dissolved in air. Referring to FIG. 2, the tap water first passes through the strainer 62 and is then squeezed by the flow restricting element 61 and supplied to the liquid flow path 9 of the core element 1 while increasing the flow velocity. By the tapered throttle mechanism of the flow throttle element 61, tap water is guided to the core element while increasing the flow velocity while suppressing pressure loss.

  The tap water collides with the screw member 10 in the liquid circulation region formed by the main circulation region 21 and the liquid circulation gap 15 formed between the screw member 10 and the inner peripheral surface of the liquid channel 9 in FIG. While passing this. At this time, the flow forms a high speed region in the valley portion 12 and a low speed region in the peak portion 11. Then, the high-speed region of the valley portion 12 becomes a negative pressure region by Bernoulli's theorem, and bubbles are generated by cavitation, that is, decompression deposition of dissolved air. Since a plurality of valleys are formed on the outer periphery of the screw member 10 and a plurality (four) of the screw members 10 are arranged in the liquid flow path 9, this reduced pressure deposition is generated in the valleys in the liquid flow path 9. Will occur at the same time.

  As a result, the reduced pressure precipitation of the dissolved air occurs violently in the liquid flow path 9, and is further vortexed and swirled into the vortex generated when the flow detours downstream of the screw member 10. Thereby, the remarkable intense stirring area | region which contains innumerable micro eddy current is formed in the circumference | surroundings and the immediate downstream area of the collision part 10. FIG. The reduced pressure region where the bubbles are deposited is limited to the vicinity of the valley bottom around the collision part 10, and since the high-speed liquid flow passes through the region almost instantaneously, the generated bubbles do not grow so much and Fine bubbles with a bubble diameter of less than 1 μm (particularly less than 500 nm) are efficiently generated by being caught in the stirring region. Due to the generation of the fine bubbles, the tap water can be improved in cleanability and permeability, and can enjoy various effects described in Patent Documents 7 to 8.

  The rectifying element 63 causes the tap water after the generation of bubbles to flow out while being rectified in the flow direction. Since the flow path is partitioned in the cross section by the rectifying element 63, the contact portion with the element surface is not easily affected by turbulence, and the coalescence due to the collision of the fine bubbles stopped at the collision portion 10 is suppressed. Thus, it contributes to the improvement of the generated concentration.

  8 and 9 show the assembly process of the liquid processing nozzle 100. FIG. As shown in the left of FIG. 8, first, the rectifying element 63 (and the O-ring 63a) is inserted into the accommodating passage portion 56 from the female screw portion 50c side of the main body portion 50b, and is held against the stepped surface 56b. The rectifying element 63 may be a gap fit with respect to the inner peripheral surface (the section between the stepped surfaces 56b and 56a) of the accommodating passage portion 56, and the inner diameter of the accommodating passage portion 56 with the outer diameter of the rectifying element 63 in a free state. Alternatively, it may be set larger than that, and may be stretched and fixed to the inner peripheral surface of the accommodating passage portion 56 by mounting it while being elastically reduced and deformed in the radial direction.

  Next, as shown in the right side of FIG. 8, the core element 1 and the flow restricting element 61 are sequentially inserted into the accommodation passage portion 56 with a gap, and the front edge of the core element 1 is held against the stepped surface 56a. Further, as shown in FIG. 9, the strainer 62 with packing is placed on the bottom of the opening of the main body 50b, and the male thread 50d of the pressing member 50a to which the O-ring 50e is attached is connected to the female thread on the main body 50b side through an adhesive. The liquid processing nozzle 100 of FIG. 2 is obtained by screwing and joining to 50c.

  As described above, the liquid processing nozzle 100 is such that the processing function part 60 that is separate from the nozzle casing 50 is inserted into the accommodation passage part 56 of the nozzle casing 50 in which the connection joint parts 51 and 52 are formed. There are features. As shown in FIG. 2, the processing function unit 60 includes a plurality of constituent elements 63 and 61 including at least one core element 1. The core element 1 is an independent and indispensable element that can independently perform bubble generation processing by a cavitation method. The core element 1 is basically small in size because the microbubbles are generated only by the collision part 10 arranged in the liquid flow path 9, and the core element 1 is small in the nozzle casing 50 in which the connection joint parts 51 and 52 are formed. Can be easily inserted.

  By using the core element 1 as an axis and forming the remaining elements of the processing function unit 60 as independent constituent elements 61 and 63, nozzles having different specifications are required depending on the liquid feed flow rate and the installation space of the installation destination. Even in such a case, it is possible to cope with the design by adding / deleting / replacement of the constituent elements to / from the nozzle casing 50, so that parts can be easily shared. For example, when it is desired to obtain liquid processing nozzles having different liquid feeding flow rates without changing the dimensional specifications of the nozzle casing 50, the core element 1 may be changed to one that can cope with a desired liquid feeding flow rate.

  When the core element 1 or the flow restricting element 61 constituting the processing function part 60 is constructed in the housing passage 56, the outer peripheral surface of the whole aggregate is not in close contact with the inner peripheral surface of the housing passage 56. The shape is determined so as to make a clearance fit. As a result, as shown in FIGS. 8 and 9, the processing function unit 60 can be assembled to the nozzle casing 50 very easily.

  Here, the size of the connection joint portions 51 and 52 of the nozzle casing 50 is, for example, G1 / 2 (or Rc1 / 2), and the outer diameter of the core body 2 of the core element 1 is inside such a small screw portion. It is limited to be accommodated in a narrow accommodating passage portion 56 (for example, an inner diameter of 10 mm or more and 14 mm or less). In order to effectively arrange a large number of screw members on such a small core body 2, the following contrivances have been made in the core element 1 in terms of dimensional design.

  First, as shown in FIG. 2, a pair of liquid flow paths 9 having a cylindrical inner peripheral surface with respect to the core body 2 are projected on a plane perpendicular to the axis of the core body 2 on the core body 2. The two cross-sectional centers C0 are formed in a mutually symmetrical positional relationship. When the paired liquid flow paths 9 are provided in this way, if the distance between the cross-sectional centers C1 and C1 is too far, a partition wall portion of the core body 2 that prevents the liquid flow is formed between the flow paths, resulting in pressure loss. It can be a cause.

  In order to prevent this, the two liquid flow paths 9 have a value of | LD− / D × 100 of 10% or less, where D is the cross-sectional inner diameter of the liquid flow path 9 and L is the distance between the centers. They are formed close to each other. In the present embodiment, as shown in FIG. 2, a part of the two liquid flow paths 9 overlap each other, and the flow paths are formed so as to be integrated (the value of L−D is negative). As a result, since the partition wall portion is not formed, the flow loss of the liquid passing through the impingement portion 10 close to the integration position is greatly reduced, and the efficiency of generating the slight difference bubble is further enhanced.

  Next, in FIG. 2, four screw members 10 </ b> A and 10 </ b> B are arranged in a cross shape with respect to the liquid flow path 9. Specifically, with respect to the reference line BL connecting the cross-sectional center points C1 and C1 of the liquid flow path 9, they face each other across the cross-sectional center of the liquid flow path 9 in a direction (AL) inclined by 45 ° to the first side. Screw member pair 10A, 10B facing each other across the center of the cross section of the liquid channel 9 in a direction (AL ') inclined 45 ° to the second side opposite to the first side. It consists of. With this layout, four screw members are screwed into the core body 2 toward one liquid flow path 9 while preventing the screw members from being screwed across the other liquid flow path 9. A screw member can be provided, which contributes to a significant increase in the generation efficiency of fine bubbles.

  Projecting into the liquid flow path 9 is a leg portion of the screw member, but the screw head 10h is formed to have a diameter larger than that of the leg portion. If the leg length is too small, a part of the head portion 10h of the screw member disposed in the region) protrudes from the inner peripheral surface of the adjacent liquid channel 9. If the protruding amount of the head 10h becomes too large, it becomes a pressure loss factor for the liquid flow, leading to a reduction in generation efficiency of fine bubbles. Therefore, the pair of screw members is the first screw member 10 </ b> A, which is arranged on the far side from the center point C <b> 1 of the cross section of the liquid flow path 9 in the screw axial direction AL to the outer periphery of the core body 2. Since the first screw member 10A is the second screw member 10B, the length of the screw leg portion is set so that the head portion 10h of the first screw member 10A is within the region inside the outline of the core body 2. is there.

  On the other hand, when the second screw member 10B draws the reference circle D1 with the same diameter as the cross-section of the liquid flow path 9 with respect to the cross-sectional center C0 of the core main body 2, the reference circle D1 and the cross-sectional outline of the core main body 2 The head 10h is made to fit in the area located between them. By comprising in this way, the excessive exposure to the internal peripheral surface of the liquid flow path 9 of the head 10h of a screw member can be suppressed, and said problem can be eliminated. At this time, as is apparent from the drawing, the length of the projecting leg portion of the second screw member 10B having a large distance from the outer peripheral surface of the core body 2 is such that the first screw member 10A ( It can be seen that it is geometrically essential to set a larger length than the leg protrusion length. The head portion 10h of the second screw member 10B should not be exposed at all in the adjacent liquid flow path 9. In FIG. 2, the head portion 10h is located on the side of the liquid flow path 9 to which the second screw member 10B does not belong. The leg length is adjusted so as to be located outside the inner peripheral edge of the cross section.

Here, the outer diameter of the core body 2 is regulated by the leg length of the first screw member 10A. At that time, to reduce the outer diameter of the core body 2,
(1) The head 10h of the first screw member 10A is brought as close as possible to the outer peripheral surface of the core body 2;
(2) The embedded length of the leg base end portion with respect to the core body 2 of the first screw member 10A is set as small as possible within a range in which the base end supporting strength of the screw leg portion protruding into the liquid flow path 9 can be ensured;
Is the point.

  In FIG. 2, in order to solve the above (1), the first screw member 10A is 90% (preferably 95%) of the outer diameter of the core body 2 with respect to the cross-sectional center C0 of the core body 2. The leg length is adjusted so that the outermost edge of the head 10 h is positioned on the outer side. In order to solve (2), the leg base end side of the first screw member 10A is embedded in the core body 2 within a range of 20% to 60% (preferably 30% to 50%) of the entire length of the leg. Leg length has been adjusted. As a result, the core element 1 is reduced to a level in which the outer dimension of the core body 2 is close to the geometric limit, and can be easily accommodated in the accommodating passage portion 56 having a particularly small inner diameter.

  As shown in FIG. 11, in the core element 1, the leg portion of the second screw member 10B is extended to a position close to the outer peripheral surface of the core body 2, and the head 10h is formed in the same manner as the first screw member 10A. It is also possible to adopt a configuration in which the outermost edge of is located outside the virtual circle D2. If it does in this way, when the head 10h will approach the outer peripheral surface of the core main body 2 with the 1st screw member 10A and the 2nd screw member 10B, and it accommodates in the nozzle casing 50 by clearance fitting, the inner peripheral surface of the accommodation channel part 56 However, since the protrusion of the head 10h accompanying the loosening of the screw is restricted, the setting by bonding the screw members 10A and 10B to the core body 2 can be omitted.

  In order to incorporate the liquid processing nozzle 100 into the water supply pipe system 200 of FIG. That is, as shown on the left side of FIG. 10, the nut joint 213 a of the water supply flexible pipe 213 directly connected to the stop cock 211 is loosened, and the flexible pipe 213 is deformed so that it is between the joint 211 on the stop cock 211 side. Make space for nozzle installation. Next, the connecting joint portion (internal thread portion 51: FIG. 2) on the inflow side of the liquid processing nozzle 100 is screwed and fastened to the joint portion (external thread portion) 212 on the stop cock 211 side. Next, if the flexible pipe 213 is deformed again and the nut joint 213a is screwed and fastened while being aligned with the connecting joint part (female thread part: FIG. 2) 53 on the outflow side of the liquid processing nozzle 100, the attachment is completed.

Hereinafter, modifications of the liquid processing nozzle will be listed. 2 and 3 are given the same reference numerals, and detailed description thereof is omitted.
12 is an example in which a flow restricting element 61A is provided on the upstream side of the core element 1 and a flow expanding element 61B is provided on the downstream side. The flow expanding element 61B has a tapered surface on the outflow side that is larger than the inflow side, and suppresses pressure loss (particularly pressure loss due to stagnation) that occurs when the flow that has passed through the core element 1 discontinuously expands. Fulfill. In the liquid processing nozzle 101 of FIG. 12, the rectifying element 63 is omitted, and the stepped surface 56a of FIG. 2 is also omitted correspondingly.

  FIG. 13 shows a liquid processing nozzle 102 in which another core element 1 is added via a cylindrical spacer element 64 (additional element) instead of the flow expansion element 61B on the outflow side of the core element 1 in FIG. It is. As the liquid sequentially passes through the plurality of core elements 1, the generation efficiency of fine bubbles is further enhanced. 13 accommodates the two core elements 1 and 1 and the spacer element 64 in the accommodating passage portion 56 having the same dimensional specifications as the liquid processing nozzle 101 in FIG. The length of the aperture element 61 is smaller than that in FIG.

  FIG. 14 shows an example of a liquid processing nozzle provided with a gas mixing element 65 that mixes a gas supplied from a gas source outside the nozzle casing 50 with a liquid flowing into the core element 1 as an additional element. In the liquid processing nozzle 103, the gas mixing element 65 has a gas injection pipe 65b inserted from the outer peripheral surface side of the element main body 65a into the throttle channel of the element main body 65a constituted by a venturi pipe, and a nozzle casing 50. A gas supply pipe connection joint 65c for supplying gas to the gas injection pipe 65b is provided. In this case, after sequentially inserting the core element 1 and the element main body 65a with the gas injection pipe 65b attached into the accommodating passage portion 56 of the nozzle casing 50, the gas supply pipe connection joint 65c is injected from the outside of the nozzle casing 50. It is assembled so as to communicate with the pipe 65b.

  FIG. 15 shows an example of an apparatus 500 for dissolving a gas in a liquid in one pass using the liquid processing nozzle 103 of FIG. The raw material liquid 502 is stored in a tank 501, and a liquid feed pump 505 and a liquid processing nozzle 103 are provided in this order on a supply pipe 507 extending from the tank 501. Gas is supplied to a gas supply pipe connection joint 65 c of the liquid processing nozzle 103 from a cylinder 420 as a gas supply source via a pressure reducing valve 411 and a gas supply tube 412.

  When the liquid feed pump 505 is operated, the raw material liquid from the tank 501 is supplied with the gas from the cylinder 420 by the gas mixing element 65 (FIG. 14) of the liquid processing nozzle 103, and becomes a liquid / gas mixed phase flow. Sent to element 1. The gas can be efficiently dissolved by entraining the gas phase in the cavitation turbulent flow generated in the core element 1. Further, not only liquid dissolved gas but also mixed gas can be used as a raw material for fine bubbles, and the generation efficiency of fine bubbles can be further increased. The gas-dissolved treated liquid 514 is recovered from the outlet 511 to the recovery container 512.

  The type of liquid in which the gas is dissolved is not particularly limited, but water (including an aqueous solution and a colloidal solution containing water as a solvent) can be used as already mentioned. In addition to water, it is an organic liquid such as alcohol (and its water-diluted product: alcohol), fossil fuel (gasoline, light oil, heavy oil, etc.), and edible oil. On the other hand, the type of gas to be dissolved is not limited, but is, for example, carbon dioxide, oxygen, hydrogen, ozone, chlorine, nitrogen, argon, helium, etc., and may be two or more mixed gases selected from them. .

  As shown in FIG. 16, the core element 1 shown in FIG. 2 may have only one liquid channel 9.

  Next, as illustrated in FIG. 17, the assembly forming the processing function unit may include a plurality of core elements 311 </ b> A to 311 </ b> D stacked on each other. In FIG. 17, the core elements 311A to 311D correspond to the core element 1 of FIG. 3 divided so as to have the same layout of the screw members 10A to 10B as the cross sections AA to DD. . These core elements 311 </ b> A to 311 </ b> D are attached to the accommodating passage portion 56 so that the protruding positions of the collision portion 10 (screw members 10 </ b> A and 10 </ b> B) on the inner peripheral surface of the liquid flow path 9 are different from each other. Specifically, instead of the core element 1 in FIG. 2, a stack of core elements 311 </ b> A to 311 </ b> D having an angular phase relationship shown in FIG. 17 is attached.

  In this embodiment, a passage-side engagement portion 50e (for example, a protruding strip formed in the generatrix direction of the inner peripheral surface) is provided at a certain angular position on the inner peripheral surface of the accommodating passage portion 56 of the nozzle casing 50. A core-side engagement portion 2e (groove in this embodiment) that engages with the passage-side engagement portion 50e is formed on the outer peripheral surface of the core body 2 of the plurality of 311A to 311D. The protrusion angle position of the collision part 10 (screw members 10A and 10B) of ˜311D is changed with the core side engagement part 2e as a reference. If it does in this way, the angle phase of screw member 10A, 10B can be easily aligned between several core element 311A-311D, and an assembly becomes easy.

  FIG. 18 shows the angle on the inner peripheral surface of the liquid flow path 9 at the protruding position of the collision portion 10 from the upstream side of the stacked core elements 321A to 321H toward the downstream side. In this example, the phases are arranged so as to change sequentially at a predetermined angular interval (here, 45 °). In each of the core elements 321A to 321H, only one liquid channel 9 is formed in the core body 2, and only one protrusion 10 is provided. Then, with the core-side engaging portion 2 formed on the outer peripheral surface of the core body 2 as a reference, the angular phase of the protruding position of the protruding portion 10 with respect to the inner peripheral surface of the liquid flow path 9 is a stack of the core elements 321A to 321H. It is set to advance in order of 45 °. FIG. 19 shows a state in which the core elements 321A to 321H are stacked while engaging the passage side engaging portion 50e and the core side engaging portion 2e in a plan view. The projecting portion 10 is connected to the cylindrical surface formed by the peripheral surface while changing its position in a spiral shape. When liquid is circulated through such core elements 321A to 321H, the number of screw valleys in the cross section of the flow path is greatly increased, and not only the contact efficiency between the screw valleys and the liquid and thus the generation efficiency of fine bubbles is improved. The spiral protrusion arrangement causes swirling in the flow, and the bubble crushing effect (or gas dissolution effect) can be further improved.

  The processing function part 60 shown in FIG. 20 is inserted into the accommodation passage part 56 of the nozzle casing 50, and a core holder member in which a plurality of core element mounting holes 70h are provided in a penetrating manner in a plane orthogonal to the liquid flow direction. 70. A plurality of core elements 301 (shown in FIG. 16 in this embodiment) are mounted in the core element mounting holes 70 h of the core holder member 70 as constituent elements. As a result, a plurality of core elements 301 are arranged in parallel in a plane orthogonal to the liquid flow direction, and the sink flow rate of the liquid to be processed for generating fine bubbles can be increased. By using such a core holder member 70, when it is desired to form a plurality of sets of liquid flow paths 9 having a collision portion in a single nozzle casing 50, only a plurality of core elements 301 are formed and attached to the core element 1. Thus, the liquid flow passages 9 can be freely laid out in various numbers, and the core element 1 can be shared between various design modes.

  In FIG. 20, the core element 301 has an engagement flange 302 f formed along the outer peripheral edge of one end surface of the core body, and a counterbore part formed along the opening peripheral edge of the core element mounting hole 70 h of the core holder member 70. To prevent the core element 301 from falling off in the mounting direction of the core element mounting hole 70h. In the mounted state, the engagement flange 302f is flush with the main surface of the core holder member 70, and a flow restricting member 71 in which a tapered restricting hole 71h corresponding to each core element 301 is formed is overlaid. ing. FIG. 21 shows a liquid processing nozzle 104 in which a processing function unit 60 composed of a laminate (aggregate) of a core holder member 70 and a flow restricting member 71 on which a core element 301 is mounted is mounted on a nozzle casing 151. The nozzle casing 151 has a socket-like shape in which connection joint portions 151 and 152 are formed, and the processing function unit 60 is applied to the stepped surface formed at the bottom from the opening side where the female screw joint portion 152 is formed. It has been stopped.

Hereinafter, modifications of the core element will be shown.
The core element 251 in FIG. 22 is configured in substantially the same manner as the core element 1 in FIG. 3, but an engagement flange 252 f is formed on one outer peripheral edge of the core body 252. The nozzle casing 151 has a socket-like configuration similar to that shown in FIG. 21, and the core element 251 supports the engagement flange 252f on a stepped surface that forms the bottom of the opening on which the connecting joint 152 of the female screw is formed. Thus, the nozzle casing 151 is prevented from coming off in the mounting direction. That is, the accommodation passage portion 156 of the nozzle casing 151 is characterized in that a stepped surface for holding the core body 252 is not formed and a simple cylindrical surface is formed. Piping systems 600 and 601 engaged therewith are indicated by phantom lines.

  FIG. 23 shows an example in which the core element 251 having the same configuration is added to the outflow side opening in the configuration of FIG. The core element 251 on the side supports the engagement flange 252f on the male screw end surface of the outflow side opening.

  FIG. 24 shows an example of a liquid processing nozzle in which only a core element 1 similar to that in FIG. 3 is mounted on a socket-like nozzle casing 151B having a stepped surface 151e. The reference example shown in FIG. 26 is an example of a liquid processing nozzle in which the thickness of the bottom portion on the female screw side of the resin socket type nozzle body having the male screw portion 653 and the female screw portion 652 is increased and the screw member 10 is directly screwed therein. Is shown. Even in this configuration, the overall length of the nozzle is considerably reduced and can be effectively used when the installation space is limited. However, according to the configuration of FIG. 24, the core element 1 enters the male screw portion 154 side. As shown in FIG. 26, the thickness of the bottom portion on the female screw portion 152 side is reduced, and it can be seen that further dimensional reduction is realized compared to the case of FIG.

  25, an accommodation passage portion 356 having a stepped surface 356e is formed inside one end of an elbow-shaped nozzle casing 350, and the core element 1 and the flow restricting member 61 are formed in the same formation as in FIG. The liquid processing nozzle 105 to which is attached is shown. Nut members 353 and 353 forming female screw joints are coupled to both ends of the nozzle casing 350 so as to be rotatable relative to the nozzle casing 350. In addition, it is also possible to make the joint part of one or both ends of the elbow-shaped nozzle casing into a male screw part.

DESCRIPTION OF SYMBOLS 1 Core element 2 Core main body 5 Liquid outlet 4 Liquid inlet 9 Liquid flow path 10 (10A, 10B) Colliding part (screw member)
DESCRIPTION OF SYMBOLS 11 Valley part 12 Mountain part 50 Nozzle casing 51,52,151,152 Connection joint part 54 Inflow side opening part 55 Outflow side opening part 56 Accommodating passage part 60 Processing function part 100-105 Liquid processing nozzle 61, 61A Flow throttle element ( Flow adjustment element)
61B Flow expansion element (flow adjustment element)
62 Rectifying element (flow adjustment element)
65 Gas mixing element

Claims (18)

A liquid processing nozzle that is used by being incorporated in a piping system for circulating a liquid to be processed,
It has a through-passage accommodation passage that forms an inflow opening at one end and an outflow opening at the other end, and at least a connection joint to the piping system is formed at the forming end of the inflow opening. A nozzle casing,
A plurality of constituent elements that are arranged in the accommodation passage portion of the nozzle casing and have individual flow passages and are insertable from the inflow side opening portion or the outflow side opening portion to predetermined positions in the accommodation passage portion. And a plurality of the constituent elements constituting the aggregate include: a processing function unit configured as an aggregate of:
A penetrating liquid flow path is formed in which one end face opens a liquid inlet and the other end face opens a liquid outlet, and the liquid supplied toward the inflow side opening of the nozzle casing is the liquid flow path. A core body incorporated in the processing function part in a positional relationship that allows outflow from the outflow side opening, and a circumferential ridge and a high flow rate part projecting from the inner surface of the liquid channel and on the outer peripheral surface A plurality of troughs that are alternately connected to each other, and the dissolved gas in the liquid is reduced by a pressure reducing action when the liquid in contact with the colliding part is accelerated in the troughs. One or a plurality of core elements for performing fine bubble generation treatment by supersaturated precipitation;
One or more additional elements that perform pre-treatment or post-treatment of the liquid supplied to the core element;
A liquid processing nozzle comprising two or more constituent elements including at least one core element selected from the group consisting of:   The processing function unit is configured such that, when the constituent element constructs the assembly in the housing passage portion, the outer peripheral surface of the entire assembly is in close contact with the inner peripheral surface of the housing passage portion or has a clearance fit. The liquid processing nozzle according to claim 1, wherein the shape of each of the constituent elements is defined.   The liquid processing nozzle according to claim 1, wherein the aggregate constituting the processing function unit includes a plurality of the core elements that perform the microbubble generation processing independently of each other.   The said assembly which makes the said processing function part contains the flow adjustment element which adjusts the flow of the said liquid upstream or downstream of the said core element as said additional element. The liquid processing nozzle according to item.   The flow regulating element is arranged on the upstream side or the downstream side of the core element, and the flow restricting element or the flow expanding element whose flow path cross-sectional area gradually decreases toward the liquid inlet or the liquid outlet of the core element. The liquid processing nozzle according to claim 4, which is configured as follows.   The assembly that constitutes the processing function unit includes, as the additional element, a gas mixing element that mixes a gas supplied from a gas source outside the nozzle casing with a liquid flowing into the core element. Item 6. The liquid treatment nozzle according to any one of Item 5.   The liquid according to any one of claims 1 to 6, wherein a plurality of the constituent elements are arranged in a form adjacent to each other in a flow direction in the accommodating passage portion in the assembly constituting the processing function portion. Processing nozzle.   The liquid processing nozzle according to claim 7, wherein the nozzle casing is configured as a metal piping member in which a threaded joint portion as the connection joint portion is formed at both ends.   In the assembly constituting the processing function part, a plurality of the constituent elements can be sequentially inserted into the accommodation passage part from the same end side forming the inflow side opening part or the outflow side opening part of the nozzle casing. The liquid processing nozzle according to claim 7 or 8, which is formed in a shape.   A stepped surface is formed at an intermediate position of the accommodating passage portion so as to have a large diameter on the insertion side of the component element, and the liquid processing function unit is provided in advance of the component element constituting the liquid processing function unit. The liquid processing nozzle according to claim 9, wherein an outer peripheral edge portion of a predetermined end is disposed so as to abut against the stepped surface, and a remaining portion is laminated and disposed directly or indirectly through another member. .   11. The assembly according to claim 7, wherein the assembly that forms the processing function unit includes a plurality of the core elements that are stacked directly or via a spacer member having a through channel. Liquid processing nozzle.   The liquid processing nozzle according to claim 11, wherein the plurality of core elements are attached to the housing passage portion so that the protruding positions of the collision members on the inner peripheral surface of the liquid flow path are different from each other.   An inner peripheral surface of the accommodating passage portion of the nozzle casing forms a cylindrical surface, and the nozzle body of the core element is formed in a columnar shape having an outer peripheral surface capable of being fitted into the cylindrical surface of the accommodating passage portion. The liquid processing nozzle according to any one of claims 7 to 12.   The core body of the core element is formed in a columnar shape in which the liquid flow path penetrates in a direction parallel to the axis, and the collision member is screwed from the outer peripheral surface of the core body toward the liquid flow path. The liquid processing nozzle according to any one of claims 1 to 13, wherein a tip portion is formed by a screw member that protrudes from an inner peripheral surface of the liquid flow path to form the collision portion.   A pair of liquid flow paths having a cylindrical inner peripheral surface with respect to the core body are symmetrical with respect to the cross-sectional center of the core body on a projection onto a plane orthogonal to the axis of the core body. In addition to the positional relationship, when the cross-sectional inner diameter of the liquid flow path is D and the center-to-center distance is L, the values of | LD− / D × 100 are formed so as to be close to each other or overlap each other. The screw member with respect to the liquid flow path has a cross-sectional center of the liquid flow path in a direction inclined by 45 ° to the first side with respect to a reference line connecting the cross-sectional center points of the liquid flow path in the projection. A total of 4 screw member pairs that are opposed to each other with a pair of screw members opposed to each other across the center of the cross section of the liquid channel in a direction inclined by 45 ° to the second side opposite to the first side. The books are arranged in a cross shape and each In the screw member pair, the first screw member is disposed on the side closer to the outer peripheral edge of the core body from the center of the cross section of the liquid flow path in the screw axis direction, and the second member is disposed on the far side. As the screw member, the length of the screw leg portion is set so that the head portion of the first screw member is within the region inside the outline of the core body, while the second screw member is the core body. When the reference circle is drawn with the same diameter as the cross-section of the liquid flow path with respect to the center of the cross-section, the leg length is set so that the head fits in the region located between the reference circle and the cross-sectional outline of the core body. The liquid processing nozzle according to claim 14, wherein is set larger than the first screw member.   The liquid according to claim 15, wherein the length of the leg portion is adjusted such that the head of the second screw member is positioned outside the inner peripheral edge of the cross section of the liquid channel on the side to which the second screw member does not belong. Processing nozzle.   The processing function unit includes a core holder member that is inserted into the housing passage portion of the nozzle casing and has a plurality of core element mounting holes provided in a penetrating manner in a plane orthogonal to the liquid flow direction. The liquid processing nozzle according to any one of claims 1 to 6, wherein a plurality of the core elements are mounted in the core mounting hole of the core holder member as constituent elements. A core body formed with a through-flow-type liquid flow path having a liquid inlet opening at one end face and a liquid outlet opening at the other end face, and protruding in the circumferential direction from the inner surface of the liquid flow path And a collision portion formed such that a plurality of trough portions that are high flow velocity portions are alternately connected to each other, and due to a pressure reducing action when the liquid in contact with the collision portion is accelerated in the trough portion, A core element for a liquid processing nozzle that performs fine bubble generation processing by supersaturated precipitation of a dissolved gas in a liquid,
The core body is formed in a cylindrical shape in which the liquid flow path is formed so as to penetrate in a direction parallel to the axis, and the collision member is screwed from the outer peripheral surface of the core body toward the liquid flow path, and a distal end portion Is formed by a screw member that protrudes from the inner peripheral surface of the liquid flow path and forms the collision portion,
A pair of liquid flow paths having a cylindrical inner peripheral surface with respect to the core body are symmetrical with respect to the cross-sectional center of the core body on a projection onto a plane orthogonal to the axis of the core body. In addition to the positional relationship, when the cross-sectional inner diameter of the liquid flow path is D and the center-to-center distance is L, the values of | LD− / D × 100 are formed so as to be close to each other or overlap each other. The screw member with respect to the liquid flow path has a cross-sectional center of the liquid flow path in a direction inclined by 45 ° to the first side with respect to a reference line connecting the cross-sectional center points of the liquid flow path in the projection. A total of 4 screw member pairs that are opposed to each other with a pair of screw members opposed to each other across the center of the cross section of the liquid channel in a direction inclined by 45 ° to the second side opposite to the first side. The books are arranged in a cross shape and each The first pair of screw members are arranged on the side closer to the outer peripheral edge of the core body from the center of the cross section of the liquid flow path in the screw axis direction, and the second pair of screw members is arranged on the far side. As the screw member, the length of the screw leg portion is set so that the head portion of the first screw member is within the region inside the outline of the core body, while the second screw member is the core body. When the reference circle is drawn with the same diameter as the cross-section of the liquid flow path with respect to the center of the cross-section, the leg length is set so that the head fits in the region located between the reference circle and the cross-sectional outline of the core body. Is set so as to be larger than the first screw member.

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