Static mixers for fluids and methods for mixing fluids

Abstract

This invention provides a static mixer for fluids and a method for mixing fluids, which can be used in welding torches for crimping, etc., to more efficiently mix and activate flammable gases and fluids such as air. The static mixer for fluids includes: a tube body with a linear internal space having a fluid supply pipe and a discharge pipe at both ends in the longitudinal direction; and a guide body housed in the internal space of the tube body, having helical blades arranged on its outer peripheral surface from the supply pipe toward the discharge pipe, and a gap of a predetermined size being provided between the front end of the helical blades and the inner peripheral surface forming the internal space of the tube body.

Description

Technical Field

[0001] This invention relates to a static mixer for fluids and a method for mixing fluids. More specifically, it relates to a static mixer for fluids, used, for example in welding torches for crimping, which can more efficiently mix and activate fluids such as flammable gases and air. Prior Technology

[0002] By mixing multiple different types of gases or stirring a single gas to activate it, for example, if the gas contains a combustible gas, combustion efficiency can be improved or the combustion temperature can be increased. As a gas mixer used in this manner, for example, there is the mixing element disclosed in Patent Document 1.

[0003] In the prior mixing element of Patent Document 1, a plurality of fan-shaped and helical blades, each having an end edge and composed of a perforated plate containing multiple perforations, are included within a cylindrical passage tube for fluid flow. These blades are arranged at intervals, extending along the entire axial length of the passage tube and forming an opening at the center of the passage tube. They are substantially the same shape as the end edges of the blades, and the end edges of the blades penetrate the tube wall of the passage tube in a manner that is equally parallel to each other in the transverse direction relative to the axial direction of the passage tube, and are disposed within the perforated portion of the passage tube.

[0004] [Existing Technical Documents] [Patent Literature] [Patent Document 1] Japanese Patent Application Publication No. 2020-22967 Summary of the Invention

[0005] [The problem that the invention aims to solve] Regarding this mixing element, the instruction manual emphasizes its simple structure, ease of manufacture, low production cost, and high performance. However, in practical application, the following problems exist: due to the significant fluid resistance generated by the porous plate structure, it is difficult to increase the fluid velocity, resulting in inefficient mixing and insufficient activation.

[0006] The present invention was first created in view of the above aspects, and its purpose is to provide a static mixer for fluids and a method for mixing fluids, which can be used in welding torches for crimping, etc., to more efficiently mix and activate flammable gases and fluids such as air.

[0007] [Methods for solving problems] [1] In order to achieve the above objective, the present invention is a static mixer for fluid, comprising: a tube body having a linear internal space having a fluid supply section and a discharge section at both ends in the length direction; and a guide body being housed in the internal space of the tube body, having a flow path extending along the long side direction, and having a gap of a predetermined size between the outer periphery and the inner periphery forming the internal space of the tube body, the guide body having a nut block formed by connecting a required number of nuts in the thickness direction, the flow path being formed by the threaded holes of each nut.

[0008] The static mixer for fluids of the present invention allows fluid to flow within a linear internal space encompassed by a tube. Fluid is supplied into the internal space from a fluid supply section at one end along the length of the internal space of the tube, and discharged to the outside of the internal space from a discharge section at the other end.

[0009] The fluid supplied to the internal space is also supplied to the flow path of the guide body housed within the internal space of the tube, and flows along the length of the guide body within the flow path. In addition, the fluid also flows along the length of the tube body within a gap of a predetermined size between the outer periphery of the guide body and the inner periphery forming the internal space of the tube body.

[0010] In this way, the fluid supplied from the supply section flows separately on the supply side through the gap between the flow path inside the guide body and the outside of the guide body, and then merges on the discharge side. This allows for efficient mixing and activation of flammable gases and fluids such as air passing through the two paths.

[0011] Furthermore, the guide body has a nut block formed by connecting a required number of nuts along the thickness direction, and the flow path is formed by the threaded holes of each nut. Therefore, the fluid passing through the flow path is guided and flows in a generally spiral manner along the threaded teeth of the threaded holes. In this way, even inside the flow path, the fluid becomes turbulent, and mixing in the discharge section can be carried out more efficiently.

[0012] [2] The fluid static mixer of the present invention may also be configured such that, in the fluid static mixer of [1], the guide body is formed by arranging a plurality of said nut blocks side by side.

[0013] In this case, since the guide body is composed of multiple nut blocks arranged side by side, the flow path can be divided into multiple paths to allow fluid to flow, thereby enabling more efficient mixing of fluids during merging.

[0014] [3] The fluid static mixer of the present invention may also be configured such that, in the fluid static mixer of [2], a plurality of the nut blocks in the guide body are integrally twisted in the circumferential direction.

[0015] In this case, because multiple nut blocks in the guide body are twisted circumferentially as a whole, the outer periphery and the flow path become a slowly spirally curved flow path. In this way, the fluid flowing under high pressure is guided along the spirally curved outer periphery and flow path, and flows as turbulent while encountering stronger resistance than straight flow, thus further improving the mixing efficiency at the confluence.

[0016] [4] In addition, in order to achieve the above objective, the present invention is a static mixer for fluid, comprising: a tube body having a linear internal space having a fluid supply section and a discharge section at both ends in the length direction; and a guide body being housed in the internal space of the tube body, having a flow path extending along the long side direction, and having a gap of a predetermined size between the outer periphery and the inner periphery forming the internal space of the tube body, wherein the guide body is made of a metal plate rolled into a cylindrical shape and has the flow path inside.

[0017] The static mixer for fluids of the present invention allows fluid to flow within a linear internal space encompassed by a tube. Fluid is supplied into the internal space from a fluid supply section at one end along the length of the internal space of the tube, and discharged to the outside of the internal space from a discharge section at the other end.

[0018] The fluid supplied to the internal space is also supplied to the flow path of the guide body housed within the internal space of the tube, and flows along the length of the guide body within the flow path. In addition, the fluid also flows along the length of the tube body within a gap of a predetermined size between the outer periphery of the guide body and the inner periphery forming the internal space of the tube body.

[0019] In this way, the fluid supplied from the supply section flows separately on the supply side through the gap between the flow path inside the guide body and the outside of the guide body, and then merges on the discharge side. This allows for efficient mixing and activation of flammable gases and fluids such as air passing through the two paths.

[0020] Furthermore, the guide body is made of a metal plate rolled into a cylindrical shape, and a flow path is provided inside. Therefore, the fluid supplied from the supply unit can flow through the flow path formed inside the metal cylinder. In addition, by forming it by rolling the metal plate into a cylindrical shape, the diameter of the cylinder can be adjusted appropriately. Moreover, the cross-sectional shape can be formed into a vortex shape, etc., to create a shape with a higher mixing effect.

[0021] [5] The static mixer for fluids of the present invention may also be configured such that, in the static mixer for fluids of the present invention, a through hole penetrating the back of the metal plate is provided at a predetermined location on the metal plate.

[0022] In this case, since a through-hole penetrating the back of the instrument is provided at a designated location on the metal plate, the fluid flowing in the two routes—the flow path inside the guide body and the gap outside the guide body—enters and exits the flow path and gap through the through-hole. As a result, the entering and exiting fluids become turbulent by colliding with the fluids passing through the flow path and gap, further improving the mixing efficiency.

[0023] [6] The static mixer for fluids of the present invention may also be configured such that, in the static mixer for fluids of the present invention, a raised portion protruding from the surface, back or front-back is provided along the edge of the through hole.

[0024] Here, when the upright part is set on the "surface", "back side" or "surface-back side", the fluid becomes turbulent by colliding with the upright part, and the mixing efficiency is further improved. In addition, when the upright part is provided on the "surface (excluding the area corresponding to the outer peripheral surface of the cylinder)," "back side" or "surface back side", when the cylinder is formed into a vortex-shaped cross-section, the upright part becomes a spacer, thereby ensuring the spacing between the layers forming the vortex. Furthermore, when the upright portion is placed on the "surface (wherein, limited to the area corresponding to the outer circumferential surface of the cylinder)," the upright portion becomes a spacer, thereby ensuring the formation of a gap between it and the inner circumference of the tube.

[0025] [7] The fluid static mixer of the present invention may also be configured such that, in the fluid static mixer of [1] or [4], a protrusion or groove is provided spirally from the supply part toward the discharge part on the inner peripheral wall of the tube body.

[0026] In this case, since the inner circumferential wall of the pipe body is provided with protrusions or grooves in a spiral shape from the supply section to the discharge section, the fluid passing through the gap can be guided in a spiral shape along the protrusions or grooves. In addition, the fluid guided by the spiral protrusions or grooves becomes turbulent through contact with the protrusions or grooves, and the mixing efficiency is further improved.

[0027] [8] The fluid static mixer of the present invention may also be configured such that, in the fluid static mixer of [1] or [4], a groove is provided linearly along the length direction from the supply part toward the discharge part on the inner peripheral wall of the tube body.

[0028] In this case, since grooves are linearly provided along the length of the pipe from the supply section to the discharge section on the inner circumferential wall of the pipe body, the fluid passing through the gap can be guided in a straight direction along the linear grooves. In addition, the straight flow of the fluid, for example, generates turbulence through contact with fluids whose flow direction intersects with that of a spiral flow, thereby further improving the mixing efficiency.

[0029] [9] In order to achieve the above objective, the present invention is a method for mixing fluid, wherein fluid is mixed from the supply part toward the discharge part in a gap between the inner periphery of a tube having a linear internal space having a fluid supply part and a discharge part at both ends in the length direction, and the outer periphery of a guide body disposed inside the tube having a nut block for connecting a required number of nuts in the thickness direction, and a flow path formed by the threaded holes of each nut, and the fluid flows through the gap and the flow path in the length direction of the tube and through the inflow and outflow paths.

[0030] The fluid mixing method of the present invention allows for a flow along the length of the pipe body, from the supply section toward the discharge section, through the gap between the inner periphery of the pipe body, which has a linear internal space with a fluid supply section and a discharge section at both ends in the longitudinal direction, and the outer periphery of a guide body disposed inside the pipe body, and a flow path disposed inside the guide body. Simultaneously, an inflow / outflow is formed between the gap and the flow path.

[0031] Thus, by circulating along two routes—the flow along the length of the tube through the gap and the flow path, and the inflow / outflow between the gap and the flow path—on the supply side, the flow path inside the guide body and the gap outside the guide body separate, thereby forming an inflow / outflow between the gap and the flow path, while merging on the discharge side. This allows for efficient mixing and activation of flammable gases and fluids such as air passing through the two routes.

[0032] Furthermore, the guide body has a nut block formed by connecting a required number of nuts along the thickness direction, and the flow path is formed by the threaded holes of each nut. Therefore, the fluid passing through the flow path is guided and flows in a generally spiral manner along the threaded teeth of the threaded holes. In this way, even inside the flow path, the fluid becomes turbulent, and mixing in the discharge section can be carried out more efficiently.

[0033]

[10] In order to achieve the above objective, the present invention is a method for mixing fluid, wherein fluid flows from the supply part toward the discharge part through two routes: the inner periphery of a tube having a linear internal space with a fluid supply part and a discharge part at both ends in the length direction, the outer periphery of a guide body disposed inside the tube body and having a flow path therein, and the flow path disposed inside the guide body.

[0034] The fluid mixing method of the present invention allows for a flow along the length of the pipe body, from the supply section toward the discharge section, through the gap between the inner periphery of the pipe body, which has a linear internal space with a fluid supply section and a discharge section at both ends in the longitudinal direction, and the outer periphery of a guide body disposed inside the pipe body, and a flow path disposed inside the guide body. Simultaneously, an inflow / outflow is formed between the gap and the flow path.

[0035] Thus, by circulating along two routes—the flow along the length of the tube through the gap and the flow path, and the inflow / outflow between the gap and the flow path—on the supply side, the flow path inside the guide body and the gap outside the guide body separate, thereby forming an inflow / outflow between the gap and the flow path, while merging on the discharge side. This allows for efficient mixing and activation of flammable gases and fluids such as air passing through the two routes.

[0036] Furthermore, the guide body is made of a metal plate rolled into a cylindrical shape, and a flow path is provided inside. Therefore, the fluid supplied from the supply unit can flow through the flow path formed inside the metal cylinder. In addition, by forming it by rolling the metal plate into a cylindrical shape, the diameter of the cylinder can be adjusted appropriately. Moreover, the cross-sectional shape can be formed into a vortex shape, etc., to create a shape with a higher mixing effect.

[0037]

[11] In order to achieve the above objective, the present invention is a static mixer for fluid, wherein in a tube having a linear central flow path having a fluid supply section and a discharge section at both ends in the length direction, a protrusion or groove is provided spirally from the supply section toward the discharge section in the inner circumference of the central flow path.

[0038] The static mixer for fluids of the present invention allows fluid to flow through a linear central flow path within a tube body. Fluid is supplied into the central flow path from a fluid supply section located at one end along its length, and discharged to the outside of the central flow path from a discharge section located at the other end. A portion of the fluid flowing from the supply section toward the discharge section within the central flow path flows substantially straight through approximately the center of the central flow path.

[0039] Another portion of the fluid flows along the inner periphery that forms the central flow path. Here, the fluid is guided into the spirally arranged protrusions or grooves within the inner periphery and flows in a spiral pattern. Furthermore, the fluid flowing straight within the central flow path and the fluid flowing in a spiral pattern repeatedly collide at their boundary, becoming turbulent and mixing, before being discharged from the outlet.

[0040]

[12] The static mixer for fluids of the present invention may also be configured such that, in the static mixer for fluids of the present invention, in the structure in which the spiral protrusion is provided on the inner periphery, the cut portion obtained by cutting the protrusion is located on a predetermined straight line in the length direction of the tube body; or, the protrusion is cut and a groove overlapping the cut portion is provided on the inner periphery along the length direction of the tube body.

[0041] In this case, because a spiral protrusion is provided on the inner circumference, and the cut portion obtained by cutting only the protrusion is located on a predetermined straight line in the length direction of the tube body; or, the protrusion is cut and a groove overlapping the cut portion is provided on the inner circumference along the length direction of the tube body, a new flow is generated in the flowing fluid that flows linearly through each cut portion, or flows linearly through each cut portion and through the groove overlapping it. In this way, in addition to the linear flow of fluid passing approximately at the center of the central flow path, the newly generated linear flow further increases the number of points where the fluid collides with each other relative to the spirally flowing fluid, thus allowing for more efficient and better fluid mixing.

[0042]

[13] The static mixer for fluids of the present invention may also be configured such that, in the static mixer for fluids of the present invention, in the structure in which the spiral groove is provided in the inner circumference, a groove intersecting the spiral groove is provided in the inner circumference along the length direction of the tube body.

[0043] In this case, because a spiral groove is provided in the inner circumference, and the grooves intersecting this spiral groove are arranged along the length of the pipe, a new flow is generated in the flowing fluid that flows linearly through the grooves in the inner circumference. Therefore, in addition to the linear flow of fluid passing approximately at the center of the central flow path, the newly generated linear flow further increases the points where the fluid collides with each other relative to the spirally flowing fluid, thus allowing for more efficient and effective fluid mixing.

[0044]

[14] In order to achieve the above objective, the present invention is a static mixer for fluid, comprising: a tube body having a linear internal space having a fluid supply section and a fluid discharge section at both ends in the length direction; and a guide body housed in the internal space of the tube body, having a protrusion spirally arranged on the outer periphery from the supply section toward the discharge section, and having a gap of a predetermined size between the front end of the protrusion and the inner periphery forming the internal space of the tube body.

[0045] The static mixer for fluids of the present invention allows fluid to flow within the linear internal space of a tube body, in the gap between the inner periphery of the internal space and the front end of the guide bar housed within the internal space, and in the space formed along the guide bar. Fluid is supplied from a fluid supply portion located at one end of the internal space along its length to the gap and space, and discharged from a discharge portion located at the other end to the outside of the internal space.

[0046] At this point, part of the fluid flowing from the supply section to the discharge section in the gap and space flows roughly straight in the gap, while the other part flows spirally in the space. Then, the fluid flowing roughly straight in the gap and the fluid flowing spirally in the space repeatedly collide with each other at their boundary, becoming turbulent and mixed, and are discharged from the discharge section.

[0047]

[15] The static mixer for fluids of the present invention may also be configured such that, in the static mixer for fluids of the

[14] , only the cut portion obtained by cutting the protrusion is provided on a predetermined straight line in the length direction of the guide body; or, the protrusion is cut and a groove that overlaps with the cut portion obtained by cutting the protrusion is provided on the outer periphery along the length direction of the guide body.

[0048] In this case, only the cut portion of the protrusion is cut open and is provided on a predetermined straight line along the length direction of the guide body; or, the protrusion is cut open and a groove is provided on the outer periphery along the length direction of the guide body that overlaps with the cut portion obtained by cutting the protrusion. Therefore, a new flow is generated in the flowing fluid that flows linearly through each cut portion, or flows linearly through each cut portion and through the groove that overlaps with it.

[0049] In this way, in addition to the linear flow of fluid through the gap, the linear flow through the channel further increases the number of points where the fluid collides with each other compared to the spiral flow, thus enabling more efficient and better mixing of the fluid.

[0050]

[16] The static mixer for fluids of the present invention may also be configured such that, in the static mixer for fluids of the

[14] or

[15] , the gap between the front end of the protrusion and the inner periphery of the tube body is formed in such a way that the size is different near the supply section and near the discharge section.

[0051] In this case, since the gap between the front end of the protrusion and the inner circumference of the tube body is different in size near the supply section and near the discharge section, when fluid is supplied from the supply section at a certain pressure, the internal pressure is prone to change due to the difference in the size of the gap, for example, the pressure is higher where the gap is narrow, and more efficient mixing can be expected to be achieved.

[0052]

[17] In order to achieve the above objective, the present invention is a method for mixing fluid, wherein, in the central flow path of a pipe having a linear central flow path having a fluid supply section and a discharge section at both ends in the length direction, the fluid flows from the supply section toward the discharge section in two routes: a linear flow through the length direction of the pipe through the central flow path and a spiral flow along the inner periphery forming the central flow path.

[0053] The fluid mixing method of the present invention forms a straight flow of fluid along the length of the pipe body from the fluid supply section to the discharge section in the central flow path of the pipe body, allowing it to circulate. Additionally, a spiral flow (or swirling flow) of fluid can be formed along the inner periphery of the central flow path and allowed to circulate. Furthermore, the fluid flowing straight within the central flow path and the fluid flowing spirally repeatedly collide at the boundary between their two paths, creating turbulence and mixing.

[0054]

[18] In order to achieve the above objective, the present invention is a method for mixing fluid, wherein, in the space between the inner periphery of a pipe having a linear central flow path having a fluid supply section and a discharge section at both ends in the length direction, and the outer periphery of a guide body disposed inside the pipe, the fluid flows from the supply section toward the discharge section in two routes: a linear flow through the gap in the length direction of the pipe and a spiral flow along the outer periphery.

[0055] The fluid mixing method of the present invention allows for the formation and flow of a straight flow of fluid along the length of the tube, from the fluid supply section to the discharge section, within the space between the outer periphery of a guide body disposed inside the tube and the inner periphery of the tube. Additionally, a spiral flow of fluid can be formed and circulated along the outer periphery of the guide body.

[0056] Thus, a portion of the fluid flowing from the supply section to the discharge section in the space flows roughly straight along the length of the pipe, while another portion flows in the space in a spiral pattern. Then, the fluid flowing roughly straight in the space and the fluid flowing spirally in the space repeatedly collide with each other at their boundary, becoming turbulent and mixed.

[0057]

[19] The fluid mixing method of the present invention can also be used in the static mixer for fluid in

[17] or

[18] , in which the fluid flows along the direction intersecting the spiral flow and along the length of the tube.

[0058] In this case, compared with the static mixer for fluid in

[17] or

[18] , the path of the fluid crossing the spiral flow is further increased, and therefore the number of points where the fluid in each path collides is also increased, so that the fluid can be mixed more efficiently.

[0059]

[20] The fluid mixing method of the present invention can also be used in the static mixer for fluids of the

[17] or

[18] to allow different types of fluids to flow simultaneously inside the tube.

[0060] In this case, because different types of fluids flow simultaneously inside the tube, mixing based on all combinations of fluids is possible. Therefore, it can flexibly meet the mixing requirements in various fields, making it extremely useful as a static mixer for fluids.

[0061] Furthermore, in this invention, the terms mixer and mixing are used to encompass both the mixing of multiple fluids of different kinds and the stirring of a single fluid.

[0062] [The effects of the invention] The present invention provides a static mixer for fluids and a method for mixing fluids, for example, for use in welding torches for crimping, which can more efficiently mix and activate flammable gases and fluids such as air. Simple Explanation of the Diagram

[0063] Figure 1 is an explanatory diagram of a welding torch for crimping fluid using the static mixer of the present invention. Figure 2 is a cross-sectional illustration of a first embodiment of the static mixer for fluids according to the present invention. Figure 3 is a cross-sectional view of the static mixer for fluid in Figure 2. Figure 4 is a perspective illustration of the guide body made of a nut block for the static mixer for fluid in Figure 2. Figure 5 is a cross-sectional illustration of a second embodiment of the static mixer for fluids according to the present invention. Figure 6 is a YY cross-sectional view of the static mixer for fluid in Figure 5. Figure 7 is a plan view of the metal plate that forms the guide body of the static mixer for fluid in Figure 5. Figure 8 is a three-dimensional illustration of the guide body made of metal plate for the static mixer for fluid in Figure 5. Figure 9 is an explanatory diagram showing a third embodiment of the static mixer for fluids according to the present invention. Figure 10 is an explanatory diagram showing a modified example of a third embodiment of the static mixer for fluids of the present invention. Figure 11 is an explanatory diagram showing a fourth embodiment of the static mixer for fluids according to the present invention. Figure 12 is an explanatory diagram showing a first modification of the fourth embodiment of the static mixer for fluids of the present invention. Figure 13 is an explanatory diagram showing a second modification of the fourth embodiment of the static mixer for fluids of the present invention. Figure 14 is an explanatory diagram showing the variation of the application of the fluid static mixer of the present invention in a crimping torch. Implementation

[0064] Referring to Figures 1 to 14, embodiments of the present invention will be described in more detail. First, the crimping torch 9 shown in Figure 1 heats the crimping portion of steel for crimping steel and the like. The crimping torch 9 has a gas inlet pipe 90. The gas inlet pipe 90 includes a base inlet pipe 90a and a front inlet pipe 90b. A combustible gas supply pipe 91 and an oxygen supply pipe 92, both equipped with valves (symbols omitted), are connected to the base inlet pipe 90a in a manner that allows them to merge.

[0065] A static mixer A for fluids according to the present invention is installed between the base inlet pipe 90a and the front inlet pipe 90b. Furthermore, a U-shaped branch pipe 93 is connected to the front end of the front inlet pipe 90b, and burner pipes 94 and 95 are connected to the two front ends of the branch pipe 93 facing each other. Multiple burner tubes 96 are installed on the burner pipes 94 and 95, each facing inward (towards the center of the same plane).

[0066] (Stationary mixer A1 for fluids) Figures 2, 3, and 4 show a static mixer A1 for fluid as a first embodiment of the static mixer for fluid of the present invention. The static mixer A1 for fluids includes a metal tube 1 (brass in this embodiment). The tube 1 has a predetermined length and is hexagonal prism in shape. Inside the tube 1, an inner circumferential surface 19 is formed at the center, which is a circular hole and forms a straight internal space 4 along the length direction.

[0067] In the pipe body 1, the interiors of the base inlet pipe 90a and the front inlet pipe 90b, which are connected to the internal space 4 at both ends along its length, form a supply passage 901 for supplying fluid and a discharge passage 902 for discharging fluid. Furthermore, the front end of the base inlet pipe 90a is connected to the supply side of the pipe body 1 (right side in Figure 2(a)) via a tapered screw (notation omitted). Similarly, the front end of the front inlet pipe 90b is connected to the discharge side (left side in Figure 2(a)) via a tapered screw (notation omitted). Thus, the supply passage 901 and the discharge passage 902 communicate with the internal space 4.

[0068] Furthermore, on the inner circumferential surface 19, spiral blades 10a and 10b, forming protrusions, are arranged along the entire length of the internal space 4 with a predetermined pitch. Spiral blades 10a and 10b constitute a double (twin) screw, and by making the pitch wider than that of a single screw, the fluid can flow more easily and at high speed without resistance. Alternatively, spiral blades 10a and 10b may not be provided; instead, a structure with grooves (not shown) spirally arranged at the same position may be used.

[0069] Furthermore, the pitch of the helical blades 10a and 10b and the helical groove in this case is not particularly limited. Additionally, while a double screw is used in this embodiment, triple, quadruple, or even more complex screws are also possible. Furthermore, the cross-sectional shape of the groove (or the portion forming the groove) is not particularly limited; for example, it can be semi-circular, U-shaped, or V-shaped. Similarly, the cross-sectional shape of the protrusion is also not particularly limited.

[0070] Furthermore, the helical angles of the helical blades 10a and 10b and the helical groove are not particularly limited. If the helical angle of the tube body 1 relative to the axis is too large, it is not easy for the fluid flowing inside to form a helical flow. Therefore, the fluid flow velocity is also likely to slow down, and the pressure of the fluid when it collides with each other is not likely to rise. Therefore, it plays an unfavorable role in the activation (clustering) of the fluid.

[0071] Conversely, if the helical angle of the tube body 1 relative to the axis is too small, helical flow is easily generated. Therefore, the fluid flow velocity increases, and the pressure when the fluid collides with each other also increases. Thus, it plays a beneficial role in the activation of the fluid. Furthermore, the helical angle is set, for example, in the range of 10° to 60° (in reality, it is also related to the amount of protrusion of the helical blades 10a and 10b or the depth of the helical groove, thus becoming a suitable angle), but there is no particular limitation.

[0072] Furthermore, on the inner circumferential surface 19, together with the helical blades 10a and 10b, grooves 11 of a predetermined width and depth are provided along the length of the tube body 1. Three grooves 11 are arranged parallel to each other at 120° intervals along the circumferential direction of the inner circumferential surface 19 (see Figure 3). Additionally, each groove 11 cuts through the helical blades 10a and 10b located at the position overlapping with the groove 11, forming a cut portion 13. Moreover, the number of grooves 11 is not particularly limited and can be appropriately set.

[0073] Furthermore, in this embodiment, each groove 11 is provided by cutting through the inner circumferential surface 19 and the helical blades 10a and 10b, but it is not limited to this. For example, it may be provided without cutting through the inner circumferential surface 19, but only cutting through the helical blades 10a and 10b. Moreover, in the case of a structure in which the grooves (shown in the figure) are provided in a spiral shape without providing the helical blades 10a and 10b, the grooves 11 may be provided in a way that intersects with the helical grooves at the same depth.

[0074] In the center of the internal space 4 (inside the spiral blades 10a and 10b), a guide body 3 is housed. The guide body 3 is formed by passing a metal wire 36 through a threaded hole 350 (see Figure 4) and connecting a required number of nuts 35 (hexagonal nuts) along the thickness direction, and arranging three nut blocks 300 of a specified length side by side. In this way, a flow path 37 containing the threaded hole 350 is formed in each nut block 300 with the same length as the nut block 300 (see Figure 4).

[0075] Furthermore, the three nut blocks 300 are integrally twisted circumferentially. This creates a gently helical groove-shaped recess (notation omitted) on the outer periphery of the guide body 3, resulting in slight looseness between the nuts 35 and irregular gaps (notation omitted) between them. Moreover, the thickness of the guide body 3 is formed to approximately match the inner diameter of the leading edge of the helical blades 10a and 10b. After being received, the guide body 3 is substantially fixed by friction with the helical blades 10a and 10b (see Figure 4).

[0076] In addition, when the guide body 3 is housed in the center of the internal space 4, firstly, the excess part 360 of the metal wire 36 from the fluid supply side of the tube 1 is inserted into the internal space 4, the nut block 300 is pressed in slightly, and then the excess part 360 extending from the discharge side is pulled out and housed in the appropriate position in the internal space 4. Furthermore, in this embodiment, for ease of illustration, the guide body 3 is arranged to the right in the internal space 4, but in reality it is arranged throughout the entire internal space 4.

[0077] Thus, a gap 40 is formed between the guide body 3 and the inner peripheral surface 19. The gap 40 includes the space between the helical blades 10a and 10b formed by the inner peripheral surface 19 and the outer peripheral portion of the guide body 3 (symbol omitted).

[0078] (effect) Referring to Figures 2 to 4, the function of the static mixer A1 for fluids will be explained. Furthermore, Figure 2(a) is a cross-sectional diagram illustrating the static mixer A1 for fluids, and Figure 2(b) is a diagram illustrating the flow of fluid at the position of the cross-sectional line in Figure 2(a) during mixing.

[0079] In the following description of mixing based on a static mixer A1 for fluids, acetylene gas (C2H2) and oxygen (O2) mixed in a prescribed ratio are used as examples of the fluids to be mixed, but this is not a limitation. Various gases, liquids, and free-flowing solids such as powders can be listed as possible fluids. Furthermore, the application of the fluid is not limited to gases used in industrial heating equipment such as welding torches; for example, it can also be used for mixing various gases used in medical applications.

[0080] Furthermore, during mixing, the acetylene gas and oxygen supplied to the static mixer A1 can be mixed once at the time of passing through the supply path 901 or further upstream, or they can be mixed simultaneously after being supplied to the pipe body 1. The same applies to the static mixers A2, A3, A3-1, A4, A4-1, and A4-2 described below.

[0081] In the static mixer A1, the fluid, which is a mixture of acetylene gas and oxygen, is supplied through the supply passage 901, which serves as the fluid supply section, to each flow passage 37 of the guide body 3 located in the center of the tube body 1. In addition, a portion (or most of the portion) of the fluid is supplied to the gap 40.

[0082] The flow of fluid flowing in each flow path 37 is guided to the thread teeth by the threaded hole 350, thus becoming a spiral flow g1 (the pitch of the spiral is not necessarily the same as the pitch of the thread teeth). This spiral flow g1 occurs in each of the three flow paths 37 and is sent from the discharge side of each flow path 37 to the discharge path 902 while being mixed (see Figure 2(a) and (b)).

[0083] In addition, the fluid supplied to the gap 40 becomes: a spiral flow g2 formed by the combination of the spiral flow along the concave part of the outer periphery caused by the torsion of the nut block 300 and the spiral flow along the spiral blades 10a and 10b, and a straight flow g3 along the groove 11. Since these flow directions intersect, they repeatedly collide with each other at their boundary parts to become turbulent and mix, and are sent to the discharge path 902.

[0084] Furthermore, in the gaps between the nuts 35, the spiral flow g1 flowing in the flow path 37, the spiral flow g2 flowing in the gap 40, and the straight flow g3, along with the multiple inflows g4 entering and exiting between the gap 40 and the flow path 37, are mixed and sent to the discharge path 902. Moreover, in the enlarged view of Figure 2(b), the nut block 300 having a flow path 37 formed by the threaded holes 350 inside each nut 35 is indicated by double dashed lines (dotted lines).

[0085] Furthermore, the spiral flow g1, spiral flow g2, straight flow g3 and inlet / outlet flow g4 will also merge and mix efficiently when entering the discharge path 902, and be discharged to the outside of the fluid static mixer A1 through the discharge path 902 (see Figure 2(a) and (b)).

[0086] Furthermore, the flow rate of the fluid during mixing is adjusted to a sufficiently high speed, thus allowing the acetylene gas and oxygen constituting the fluid to mix efficiently under high pressure and be fully activated. This also applies to the static mixers A2, A3, A3-1, A4, A4-1, and A4-2 described below.

[0087] (A2, a static mixer for fluids) Figures 5 to 8 show a second embodiment of the static mixer for fluids, A2. The static mixer for fluids A2 includes a metal tube 1. The tube 1 has the same structure as the tube 1 of the static mixer for fluids A1, and therefore its description is based on it; detailed description is omitted here. Furthermore, in Figure 5, the same reference numerals are used to denote the same parts as those in the tube 1 of Figure 2.

[0088] In the center of the internal space 4 of the fluid static mixer A2 (inside the spiral blades 10a and 10b), a guide body 3a is housed. The guide body 3a is formed by processing a metal plate 38 (copper in this embodiment). That is, the plate 38 is roughly trapezoidal in shape when viewed from above, with the upper side slightly longer than the lower side, and the upper and lower sides slightly curved in the same direction (see Figure 7).

[0089] The plate 38 is provided with a required number of through holes 39a and 39b penetrating the front and back surfaces. Each through hole 39a is a through hole punched from the front surface (the surface seen in Figure 7) towards the back surface, and each through hole 39b is a through hole punched from the back surface towards the front surface. Thus, multiple through holes 39a and 39b are alternately formed at certain intervals along the up-down and left-right directions in the plate 38.

[0090] Therefore, an upright portion 390 protruding towards the back side is formed along the edge of each through hole 39a, and an upright portion 390 protruding towards the surface side is formed along the edge of each through hole 39b (see Figures 7, 8, and Figure 5(a) described later). Furthermore, in this embodiment, the upright portion 390 protrudes towards both the surface and the back side, but it is also possible to provide only the through hole 39a with the upright portion 390 protruding towards the back side, or only the through hole 39b with the upright portion 390 protruding towards the surface side.

[0091] Furthermore, the guide body 3a is formed by rolling the plate 38 with an appropriate diameter so that circular openings are formed on the long side and the short side. In this way, the plate 38 becomes a cylinder, with a supply port 301 with a slightly larger diameter formed on the long side and a discharge port 302 with a smaller diameter formed on the short side, and a generally straight flow path 30 formed inside along the length direction.

[0092] The guide body 3a is housed in the center of the internal space 4 of the static mixer A2 for fluids, with the supply port 301 serving as the base inlet pipe 90a side and the discharge port 302 serving as the front inlet pipe 90b side. After being housed, the guide body 3a is substantially fixed by friction with the spiral blades 10a and 10b. Furthermore, the guide body 3a is housed with its thickness narrowing towards the discharge side, thereby increasing the pressure on the discharge side within the flow path 30. Alternatively, the guide body 3a can be formed entirely of the same thickness.

[0093] Furthermore, the guide body 3a has a vortex-shaped cross-section, and the two upright portions 390 protruding from the outer and inner circumferential surfaces cooperate with each other to ensure the spacing of each layer forming the vortex (see Figure 8). In addition, when the guide body 3a is housed in the internal space 4, the upright portions 390 protruding from the outer circumferential surface (surface side) abut against the helical blades 10a and 10b or the inner circumferential surface 19, thereby the upright portions 390 act as spacers to ensure the formation of a gap 40 between the guide body 3a and the inner circumferential surface 19 of the tube body 1.

[0094] (effect) Referring to Figures 5 to 8, the function of the static mixer A2 for fluids will be explained. Furthermore, Figure 5(a) is a cross-sectional illustration of the static mixer A2 for fluids, and Figure 5(b) is an illustration showing the flow of fluid at the position of the cross-sectional line in Figure 5(a) during mixing.

[0095] In the static mixer A2, a fluid, which is a mixture of acetylene gas and oxygen, is supplied through the supply passage 901, which serves as the fluid supply section, and through the supply port 301 to the flow passage 30 of the guide body 3a located in the center of the tube body 1. In addition, a portion (or most of the portion) of the fluid is supplied to the gap 40.

[0096] The flow of fluid in the flow path 30 is partially mixed by contact with the vortex-shaped layered inner wall (omitted symbol) or the upright part 390, and at the same time becomes a generally straight flow g5, which is discharged from the outlet 302 and sent to the discharge path 902 (see Figure 5(a) and (b)).

[0097] In addition, the fluid supplied to the gap 40 becomes: a straight flow g7 along the groove 11 and a spiral flow g6 along the spiral blades 10a and 10b. Since these flow directions intersect, they repeatedly collide with each other at their boundary portions to form turbulence and mix, and are sent to the discharge path 902 (see Figure 5(b)).

[0098] Furthermore, in each of the through holes 39a and 39b of the guide body 3a, by means of the pressure of the generally straight flow g5 flowing in the flow path 30, the spiral flow g6 and the straight flow g7 flowing in the gap 40, the multiple inflow and outflow flow g8 entering and exiting between the gap 40 and the flow path 30, together with the generally straight flow g5, the spiral flow g6 and the straight flow g7, are mixed and sent to the discharge path 902 (see the enlarged view of Figure 5(b)).

[0099] Furthermore, the generally straight flow g5, spiral flow g6, straight flow g7, and inlet / outlet flow g8 will also merge and mix efficiently when entering the discharge path 902, and be discharged to the outside of the static mixer A1 for fluid through the discharge path 902 (see Figure 5(a) and (b)). Moreover, in the enlarged view of Figure 5(b), the guide body 3a, which has multiple through holes 39a and 39b on its peripheral wall, is indicated by dashed lines (dotted lines).

[0100] (A3, a static mixer for fluids) Figure 9 shows a third embodiment of the static mixer for fluids, A3. The static mixer A3 includes a metal (e.g., brass) tube 1c. The tube 1c has a predetermined length and is hexagonal prism in shape. Inside the tube 1c, an inner circumferential surface 19 (inner circumference) is formed at the center, with a circular hole and a straight central flow path 100 along its length.

[0101] Within the pipe body 1c, the interiors of the base inlet pipe 90a and the front inlet pipe 90b, which are connected to the central flow path 100 at both ends along its length, form a supply path 901 for supplying fluid and a discharge path 902 for discharging fluid. Furthermore, the front end of the base inlet pipe 90a is connected to the supply side of the pipe body 1c via a tapered screw (notation omitted), and the front end of the front inlet pipe 90b is similarly connected to the discharge side via a tapered screw (notation omitted). Thus, the supply path 901 and the discharge path 902 are connected to the central flow path 100.

[0102] Furthermore, on the inner circumferential surface 19, spiral blades 10a and 10b, forming protrusions, are arranged along the entire length of the central flow path 100 with a predetermined pitch. The spiral blades 10a and 10b are double screws; by making the pitch wider than that of a single screw, the fluid can flow more easily and at high speed without resistance. Alternatively, the spiral blades 10a and 10b can be omitted, and instead, grooves (not shown) can be arranged in a spiral shape.

[0103] Furthermore, the pitch of the helical blades 10a and 10b and the helical groove in this case is not particularly limited. In addition, in this embodiment, a double (twin) screw is used, but it can also be a triple, quadruple, or even more complex screw.

[0104] Furthermore, the cross-sectional shape of the groove (or the part forming the groove) is not particularly limited; for example, it can be semi-circular, U-shaped, V-shaped, etc. Similarly, the cross-sectional shape of the protrusion is also not particularly limited.

[0105] Furthermore, the helical angles of the helical blades 10a and 10b and the helical grooves are not particularly limited. If the helical angle of the tube body 1 relative to the axis is too large, it is not easy for the fluid flowing inside to form a helical flow. Therefore, the fluid flow velocity is also likely to slow down, and the pressure of the fluid when it collides with each other is not easy to rise. Therefore, it plays a disadvantageous role in the activation (clustering) of the fluid.

[0106] Conversely, if the helical angle of the tube 1c relative to the axis is too small, helical flow is likely to occur. Therefore, the fluid flow velocity increases, and the pressure when fluids collide with each other also tends to increase, thus playing a beneficial role in fluid activation. Furthermore, the helical angle can be set in the range of 10° to 60° (in reality, it is also related to the amount of protrusion of the helical blades 10a and 10b or the depth of the helical groove, thus becoming a suitable angle), but there is no particular limitation.

[0107] (effect) Referring to Figure 9, the function of the static mixer A3 for fluids will be explained. Furthermore, Figure 9(a) is a cross-sectional view of the static mixer A3 for fluids, and Figure 9(b) is an explanatory diagram showing the flow of fluid at the position of the cross-sectional line in (a) during mixing.

[0108] The fluid, which is a mixture of acetylene gas and oxygen, is supplied to the central flow path 100 provided in the center of the tube body 1c through the supply path 901 of the fluid supply section of the static mixer A3. Then, a portion (or most of the portion) of the fluid becomes a generally straight flow along the central flow path 100 (flow g9 in Figure 9(b)).

[0109] In addition, another part of the fluid flows along the inner circumferential surface 19 of the tube 1c that forms the central flow path 100 and the spiral blades 10a and 10b, and is guided by the spiral blades 10a and 10b to become a spiral flow that flows in a spiral manner (flow g10 in (b) of Figure 9).

[0110] Furthermore, the fluid flowing straight in the direction of flow g9 inside the central flow path 100 and the fluid flowing spirally in the direction of flow g10, due to the intersection of their flow directions, repeatedly collide with each other at their boundary portion, becoming turbulent and mixing, and are discharged to the outside of the fluid static mixer A3 through the discharge path 902, which serves as the discharge section.

[0111] In addition, the flow rate of the fluid during mixing is adjusted to a sufficiently high speed, so that the acetylene gas and oxygen constituting the fluid can be efficiently mixed and fully activated under high pressure.

[0112] (A3-1 Static Mixer for Fluids) Figure 10 shows a modified example of the static mixer A3 for fluids, namely a static mixer A3-1. In addition to the structure of the static mixer A3, the static mixer A3-1 has a groove 11 of a predetermined width and depth provided on its inner circumferential surface 19 along the length of the tube body 1a.

[0113] The grooves 11 are arranged in four parallel positions at 90° intervals along the circumferential direction of the inner circumferential surface 19. In addition, each groove 11 cuts through the helical blades 10a and 10b located at the position overlapping with the groove 11 to form a cut portion 13. Furthermore, the number of grooves 11 is not particularly limited and can be set appropriately.

[0114] Furthermore, in this embodiment, each groove 11 is provided by cutting through the inner circumferential surface 19 and the helical blades 10a and 10b, but it is not limited to this. For example, it may be provided without cutting through the inner circumferential surface 19, but only cutting through the helical blades 10a and 10b. Moreover, in the case of a structure in which the grooves are provided in a spiral shape without providing the helical blades 10a and 10b (not shown), the grooves 11 may be provided in such a way that they intersect with the helical grooves at the same depth.

[0115] (effect) Referring to Figure 10, the function of the static mixer A3-1 for fluids will be explained. Furthermore, Figure 10(a) is a longitudinal sectional view of the static mixer A3-1 for fluids, and Figure 10(b) is a diagram showing the flow of fluid at the position of the section line in (a) during mixing.

[0116] Regarding the static mixer A3-1, the same structure as the static mixer A3 results in the same effect as the static mixer A3. That is, the fluid supplied from the supply passage 901 and flowing straight in the flow g9 direction inside the central flow passage 100, and the fluid flowing spirally in the flow g10 direction, intersect each other in their flow directions. Therefore, they repeatedly collide with each other at their boundary, becoming turbulent and mixing, and are discharged to the outside of the static mixer A3-1 through the discharge passage 902, which serves as the discharge section.

[0117] Furthermore, in the static mixer A3-1, new flows are generated in the fluid flowing through the central flow path 100. These flows are linearly flowing through the cuts 13 of each of the helical blades 10a and 10b, and linearly flowing through each cut 13 and the overlapping grooves 11 (flow g11 in FIG. 10(b)). Thus, in addition to the linear flow g9 of the fluid flowing approximately through the center of the central flow path 100, four linear flows g11 are added, further increasing the number of points where the spirally flowing flows g10 collide with each other. This allows for more efficient and effective mixing of the fluid.

[0118] (A4 Static Mixer for Fluids) Figure 11 shows a fourth embodiment of the static mixer for fluids, A4. The static mixer for fluids A4 includes a metal tube 1b. The tube 1b has a predetermined length and is hexagonal prism in shape. Inside the tube 1b, an inner peripheral surface 19 (inner peripheral portion) is formed at the center of a circular hole and forms a linear internal space 4 along the length direction.

[0119] Within the pipe body 1b, the interiors of the base inlet pipe 90a and the front inlet pipe 90b, which are connected to the internal space 4 at both ends along its length, form a supply passage 901 for supplying fluid and a discharge passage 902 for discharging fluid. Furthermore, the front end of the base inlet pipe 90a is connected to the supply side of the pipe body 1b via a tapered screw (notation omitted), and the front end of the front inlet pipe 90b is similarly connected to the discharge side via a tapered screw (notation omitted). Thus, the supply passage 901 and the discharge passage 902 communicate with the internal space 4.

[0120] In the center of the internal space 4, a guide body 3b is housed. The guide body 3b is a straight, approximately cylindrical rod shape with a specified diameter. Conical guide portions 31 and 32, which facilitate the flow of fluid, are provided at both ends of the guide body 3b along its length. Furthermore, the guide body 3b is fixed in a structure in which the guide portions 31 and 32 are housed in the supply passage 901 and the discharge passage 902, and in a structure that allows fluid to flow into the base inlet pipe 90a and the front inlet pipe 90b.

[0121] Furthermore, on the outer peripheral surface 39 of the guide body 3b, spiral blades 30a and 30b, forming protrusions, are provided along its entire length with a predetermined pitch. The spiral blades 30a and 30b are twin-screws; by making the pitch wider than that of a single-screw design, the fluid can flow more easily and at high speed without resistance. Alternatively, the spiral blades 30a and 30b can be omitted, and instead, grooves (not shown) can be provided in a spiral shape.

[0122] Thus, a space 40 is formed between the guide body 3b and the inner peripheral surface 19. The space 40 includes the space between the spiral blades 30a and 30b (symbol omitted) and the entire length of the front ends of the spiral blades 30a and 30b, and a gap 400 of a predetermined width is provided between the guide body 3b and the inner peripheral surface 19 forming the internal space 4 of the tube body 1b.

[0123] (effect) Referring to Figure 11, the function of the static mixer A4 for fluids will be explained. Furthermore, Figure 11(a) is a cross-sectional illustration of the static mixer A4 for fluids, and Figure 11(b) is an illustration showing the flow of fluid at the position of the cross-sectional line in (a) during mixing.

[0124] As a fluid mixture of acetylene and oxygen, it is supplied to the internal space 4 located at the center of the tube 1b through the supply path 901 of the fluid supply section of the static mixer A4. Then, a portion of the fluid flows in a generally straight line along the inner circumferential surface 19 and the gap 400 of the tube 1b (flow g13 in Figure 11(b)).

[0125] In addition, another part of the fluid flows in space 40 along the helical blades 30a, 30b and inner circumferential surface 19, and is guided by the helical blades 30a and 30b to become a helical flow that flows in a manner that depicts a helix (flow g12 in (b) of Figure 11).

[0126] Furthermore, the approximately straight flow g13 along the inner circumferential surface 19 of the tube body 1b and the gap 400, and the fluid flowing in a spiral direction towards the flow g12, due to the intersection of their flow directions, repeatedly collide with each other at their boundary portion, becoming turbulent and mixing, and are discharged to the outside of the static mixer A4 for fluid through the discharge passage 902, which serves as the discharge section.

[0127] In addition, the flow rate of the fluid during mixing is adjusted to a sufficiently high speed, so that the acetylene gas and oxygen constituting the fluid can be efficiently mixed and fully activated under high pressure.

[0128] (A4-1 Static Mixer for Fluids) Figure 12 shows a first modified example of the static mixer A4 for fluids, namely a static mixer A4-1 for fluids according to the present invention. In addition to the structure of the static mixer A4 for fluids, the static mixer A4-1 for fluids has a groove 34 of a predetermined width and depth provided on the outer peripheral surface 39 of the guide body 3c along the length direction.

[0129] The grooves 34 are arranged in four parallel positions at 90° intervals along the circumferential direction of the outer peripheral surface 39. Furthermore, each groove 34 cuts through the helical blades 30c and 30d located at positions overlapping with the groove 34 to form a cut portion 33. Moreover, the number of grooves 34 is not particularly limited and can be appropriately set.

[0130] Furthermore, in this embodiment, each groove 34 is provided by cutting through the outer peripheral surface 39 and the helical blades 30c and 30d, but it is not limited to this. For example, it may be provided without the inner peripheral surface 19, but only by cutting through the helical blades 30c and 30d. Moreover, in the case of a structure in which the grooves are provided in a spiral shape without the helical blades 30c and 30d (illustration omitted), the grooves 34 may be provided in a way that intersects with the helical grooves at the same depth.

[0131] (effect) Referring to Figure 12, the function of the static mixer A4-1 for fluids will be explained. Furthermore, Figure 12(a) is a cross-sectional view of the static mixer A4-1 for fluids, and Figure 12(b) is an explanatory diagram showing the flow of fluid at the position of the cross-sectional line in (a) during mixing.

[0132] Regarding the static mixer A4-1, the function resulting from the same structure as the static mixer A4 is the same as that of the static mixer A4. That is, the fluid supplied from the supply passage 901 and flowing straight in the flow g13 direction in the gap 400, and the fluid flowing spirally in the flow g12 direction, due to the intersection of their flow directions, repeatedly collide with each other at their boundary portion, becoming turbulent and mixing, and are discharged to the outside of the static mixer A4-1 through the discharge passage 902, which serves as the discharge section.

[0133] Furthermore, in the static mixer A4-1, new flows are generated in the fluid flowing in the space 40. These flows are linearly flowing through the cuts 33 of each helical blade 30c and 30d, and linearly flowing through each cut 33 and the overlapping grooves 34 (flow g14 in FIG. 12(b)). Thus, in addition to the linear flow g13 of the fluid flowing through the gap 400, four linear flows g14 are added, further increasing the number of points where the spirally flowing flows g12 collide with each other. This allows for more efficient and effective mixing of the fluid.

[0134] (A4-2 Static Mixer for Fluids) Figure 13 shows a second variation of the static mixer A4 for fluids, namely a static mixer A4-2. The static mixer A4-2 includes a tube body 1b with the same structure as the static mixer A4 for fluids.

[0135] In the center of the internal space 4 of the tube body 1b, a guide body 3d is housed. The guide body 3d is formed into a partially conical shape, with the thicker end located on the side of the supply path 901 and is fixed in a structure that allows fluid to flow to the base inlet tube 90a and the front inlet tube 90b.

[0136] Furthermore, on the outer peripheral surface 39a of the guide body 3d, along its entire length, helical blades 30e and 30f are provided with a specified pitch. Helical blades 30e and 30f are twin-screws; by making the pitch wider than that of a single-screw, the fluid can flow more easily and at high speed without resistance. Alternatively, the structure can be configured without helical blades 30e and 30f, but instead with grooves (not shown) arranged in a spiral shape.

[0137] Furthermore, a space 40a is provided between the guide body 3d and the inner peripheral surface 19 of the tube body 1b. Space 40a includes the space extending between the spiral blades 30e and 30f (symbols omitted) and the entire length of the front ends of the spiral blades 30e and 30f, with a gap 400 of a predetermined width provided between it and the inner peripheral surface 19 forming the internal space 4 of the tube body 1b. Therefore, the space portion 41 near the supply path 901 and the space portion 42 near the discharge path 902 of space 40a have different dimensions, with space portion 42 being larger.

[0138] (effect) Referring to Figure 13, the function of the static mixer A4-2 for fluids is explained. Regarding the static mixer A4-2 for fluids, the effect resulting from the structure being substantially the same as that of the static mixer A4 for fluids is the same as that of the static mixer A4 for fluids.

[0139] That is, the fluid supplied from the supply path 901 and flowing straight along the inner circumferential surface 19 in the gap 400a in the space 40a in the direction of flow g13, and the fluid guided by the spiral blades 30e and 30f and flowing in a spiral direction in the direction of flow g12, due to the intersection of their flow directions, repeatedly collide with each other at their boundary portion, thus becoming turbulent and mixing, and is discharged to the outside of the fluid static mixer A4-2 through the discharge path 902, which serves as the discharge section.

[0140] Furthermore, the dimensions of the space 41 near the supply passage 901 and the space 42 near the discharge passage 902 in the space 40a between the leading ends of the spiral blades 30e and 30f and the inner circumferential surface 19 of the tube body 1b are different, with space 42 being larger. Therefore, when fluid is supplied from the supply passage 901 at a certain pressure, the internal pressure is more likely to fluctuate due to the difference in size between space 41 and space 42, for example, the pressure is higher in narrower areas (space 41), which can lead to more efficient mixing.

[0141] Referring to Figure 14, a variation of the application part in the crimping torch of the fluid static mixer A4 is explained (variation example). Here, for convenience, the fluid static mixer A4 is used as an example for explanation, but other fluid static mixers A1, A2, A3, A3-1, A4-1, and A4-2 can also be used in the same way.

[0142] Figure 14(a) shows a type in which acetylene gas and oxygen are separately supplied to a static mixer A4 for fluid mixing, and are mixed inside the static mixer A4. Figure 14(b) shows a type in which only oxygen is mixed using the static mixer A4 for fluid mixing, and then mixed with acetylene gas through the base inlet pipe 90a.

[0143] Additionally, Figure 14(c) shows a type where only acetylene gas is mixed using a fluid static mixer A4, and then mixed with oxygen via a base inlet pipe 90a. In both types, the activated acetylene gas and oxygen mixture is ultimately supplied from the front inlet pipe 90b.

[0144] Furthermore, the static mixers for fluids A1 to A4-2 are not limited to using only the welding torch for crimping; they can also be used as gas mixers located near the upstream side of the burner of other heating appliances, such as welding equipment.

[0145] The terminology and expressions used in this specification and the claims are illustrative only and are not intended to limit anything, nor are they intended to exclude terms or expressions equivalent to the features described in this specification and the claims. Furthermore, various modifications are naturally possible within the scope of the technical concept of this invention.

[0146] A1: Static mixer for fluids 1: Pipe body 4: Interior space 40: Gap 10a, 10b: Spiral blades 11: Slot 13: Incision area 3: Guiding body 300: Nut block 35: Nut 350: Threaded hole 36: Metal wire 360: Redundant Units 37: Distribution Road A2: Static mixer for fluids 1: Pipe body 4: Interior space 40: Gap 10a, 10b: Spiral blades 11: Slot 13: Incision area 3a: Guiding body 38:Plate body 39a: Through hole 39b: Through hole 390: Erecting part 301: Supply Port 302: Discharge outlet A3: Static mixer for fluids 1c:tube body 100: Center flow path 901: Supply Route 902: Exhaust route 10a, 10b: Spiral blades A3-1: Static mixer for fluids 1a:tube body 11: Slot 13: Incision area A4: Static mixer for fluids 1b:tube body 3a: Guiding body 30a, 30b: Spiral blades 39: Outer Peripheral Surface 4: Interior space 40: Space 400: Gap A4-1: Static mixer for fluids 3c: Guiding body 34: slot 30c, 30d: Spiral blades 33: Incision area A4-2: Static mixer for fluids 3D: Guide Body 4: Interior space 40a: Space 400a: Clearance 41: Space Department 42: Space Department 9: Welding torch for crimping 90: Gas inlet tube 90a: Base inlet tube 901: Supply Route 90b: Front inlet tube 902: Exhaust route 91: Combustible gas supply pipe 92: Oxygen supply pipe

Claims

1. A static mixer for fluids, characterized in that it comprises: The pipe body has a linear internal space with fluid supply and discharge sections at both ends along its length. The guide body is housed in the internal space of the tube and has a flow path extending along its long side. A gap of a predetermined size is provided between the outer periphery and the inner periphery forming the internal space of the tube. The guide body has a nut block formed by connecting a required number of nuts along the thickness direction. The flow path is formed by the threaded holes of each nut.

2. The static mixer for fluid as described in claim 1, wherein, The guide body is formed by arranging multiple nut blocks side by side.

3. The static mixer for fluid as described in claim 2, wherein, In the guide body, multiple nut blocks are integrally twisted circumferentially.

4. A static mixer for fluids, characterized in that it comprises: The pipe body has a linear internal space with fluid supply and discharge sections at both ends along its length. The guide body is housed in the internal space of the tube and has a flow path extending along its long side. A gap of a predetermined size is provided between the outer periphery and the inner periphery forming the internal space of the tube. The guide body is made of a metal plate rolled into a cylindrical shape and has the flow path inside.

5. A static mixer for fluids as described in claim 4, wherein, A through hole penetrating the back of the surface is provided at a designated location on the metal plate.

6. A static mixer for fluids as described in claim 5, wherein, Along the edge of the through hole, there is a raised portion protruding from the surface, back, or back side.

7. A static mixer for fluids as described in claim 1 or 4, wherein, On the inner circumferential wall of the tube, protrusions or grooves are spirally arranged from the supply section toward the discharge section.

8. A static mixer for fluids as described in claim 1 or 4, wherein, A groove is provided linearly along the length direction from the supply section toward the discharge section on the inner peripheral wall of the tube.

9. A method for mixing a fluid, characterized in that, in a gap between the inner periphery of a pipe having a linear internal space having a fluid supply section and a discharge section at both ends in the length direction, and the outer periphery of a guide body disposed inside the pipe having a nut block formed by connecting a required number of nuts in the thickness direction, and a flow path formed by the threaded holes of each nut, the fluid flows from the supply section toward the discharge section via two routes: flow in the length direction of the pipe through the gap and the flow path, and inflow / outflow between the gap and the flow path.

10. A method for mixing a fluid, characterized in that, in the gap between the inner periphery of a tube having a linear internal space having a fluid supply section and a discharge section at both ends in the length direction, and the outer periphery of a guide body disposed inside the tube body having a metal plate rolled into a cylindrical shape and having a flow path disposed inside, and in the flow path disposed inside the guide body, the fluid flows from the supply section toward the discharge section via two routes: a flow through the gap and the flow path in the length direction of the tube body, and an inflow / outflow between the gap and the flow path.

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