Static mixer for fluid and mixing method for fluid

Abstract

Provided is a static mixer for a fluid, wherein the static mixer can more efficiently mix and thereby activate fluids such as combustible gases or air used in a pressure welding torch or the like. The static mixer A4 for a fluid comprises: a pipe body 1 provided with a linear internal space 4 and having a fluid supply pipe 90a and a fluid discharge pipe 90b at both ends thereof in the length direction; and a guide body 3b which is accommodated in the internal space 4 of the pipe body 1b, has spiral blades 30a, 30b, extending from the supply pipe 90a toward the discharge pipe 90b, on the outer peripheral surface 39, and has a gap 400 of a predetermined size between tips of the spiral blades 30a, 30b and an inner peripheral surface 19 forming the internal space 4 of the pipe body 1b.

Description

Static mixer for fluids and method for mixing fluids

[0001] The present invention relates to a static mixer for fluids and a method for mixing fluids. Specifically, the present invention relates to a static mixer for fluids and a method for mixing fluids that can more efficiently mix and activate fluids such as combustible gas and air, which are used in, for example, a torch for pressure welding.

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

[0003] The conventional mixing element of Patent Document 1 has a plurality of fan-shaped and spiral blade bodies made of a porous plate having an edge portion and a plurality of perforations in a cylindrical passage pipe through which a fluid flows. The blade bodies are arranged at intervals from each other, an opening is formed at the center of the passage pipe over the entire axial length of the passage pipe, and the edge portion of the blade body is arranged at the perforation portion of the passage pipe so as to be substantially the same shape as the edge portion of the blade body and parallel to each other at equal intervals in the lateral direction with respect to the axial direction of the passage pipe.

[0004] Japanese Unexamined Patent Application Publication No. 2020-22967

[0005] In the description of this mixing element, it is praised that the structure is simple, the manufacturing is easy, the manufacturing cost can be reduced, and it has high performance. However, in practical performance, since the fluid resistance due to the porous plate becomes extremely large structurally, it is difficult to increase the speed of the fluid, efficient mixing cannot be performed, and there is a problem that activation is not sufficient.

[0006] The present invention was devised in view of the above points, and an object of the present invention is to provide a static mixer for fluids and a method for mixing fluids that can more efficiently mix and activate fluids such as combustible gas and air, which are used in, for example, a torch for pressure welding.

[0007] [1] In order to achieve the above objective, the present invention provides a stationary fluid mixer comprising: a pipe having a linear internal space with a fluid supply section and a fluid discharge section at both ends in the longitudinal direction; and a guide body housed in the internal space of the pipe, having a flow passage that penetrates in the longitudinal direction, with a predetermined gap between its outer circumference and the inner surface forming the internal space of the pipe, wherein the guide body has a nut mass formed by connecting a required number of nuts in the thickness direction, and the flow passage is formed by the screw holes of each of the nuts.

[0008] The stationary fluid mixer of the present invention can circulate fluid through a linear internal space provided by a pipe. The fluid is supplied into the internal space from a fluid supply section at one end of the pipe along its length, 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 passage of the guide body housed within the internal space of the pipe, and flows through the flow passage in the longitudinal direction of the guide body. In addition, the fluid also flows in the longitudinal direction of the pipe through a predetermined gap between the outer circumference of the guide body and the inner surface that forms the internal space of the pipe.

[0010] In this way, the fluid supplied from the supply section separates and flows through the internal flow passages and the gaps on the outside of the guide body at the supply section, and then merges at the discharge section. This allows for efficient mixing and activation of the flammable gas and other fluids such as air that have passed through both routes.

[0011] Furthermore, the guide body has a nut mass formed by connecting the required number of nuts in the thickness direction, and the flow passage is formed by the screw holes of each nut. As a result, the fluid passing through the flow passage is guided in a roughly spiral manner along the helix of the screw threads that form the screw holes, and flows through the passage. This causes turbulence within the flow passage, allowing for more efficient mixing at the discharge section.

[0012] [2] In the static fluid mixer of the present invention, the guide body may be configured to consist of a plurality of the nut clusters arranged in parallel.

[0013] In this case, the guide body consists of multiple nut clusters arranged in parallel, allowing the fluid to flow through multiple passages, and enabling more efficient mixing of the fluids when they merge.

[0014] [3] In the static fluid mixer of the present invention, the guide body may be configured such that a plurality of the nut clusters are twisted together in the circumferential direction.

[0015] In this case, since the guide body consists of multiple nut clusters twisted together circumferentially, the outer circumference and flow path form a gently curving spiral flow path. As a result, the fluid flowing at high pressure is guided along the spirally curved outer circumference and flow path, experiencing stronger resistance than if it were flowing in a straight line, and thus flowing in a turbulent flow, further increasing the mixing efficiency when the fluids merge.

[0016] [4] In addition, in order to achieve the above objectives, the present invention provides a stationary fluid mixer comprising: a pipe having a linear internal space with a fluid supply section and a fluid discharge section at both ends in the longitudinal direction; and a guide body housed in the internal space of the pipe, having a flow passage that penetrates in the longitudinal direction, with a predetermined gap provided between its outer circumference and the inner surface that forms the internal space of the pipe, wherein the guide body is made by rolling a metal plate into a cylindrical shape and having the flow passage inside.

[0017] The stationary fluid mixer of the present invention can circulate fluid through a linear internal space provided by a pipe. The fluid is supplied into the internal space from a fluid supply section at one end of the pipe along its length, 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 passage of the guide body housed within the internal space of the pipe, and flows through the flow passage in the longitudinal direction of the guide body. In addition, the fluid also flows in the longitudinal direction of the pipe through a predetermined gap between the outer circumference of the guide body and the inner surface that forms the internal space of the pipe.

[0019] In this way, the fluid supplied from the supply section separates and flows through the internal flow passages and the gaps on the outside of the guide body at the supply section, and then merges at the discharge section. This allows for efficient mixing and activation of the flammable gas and other fluids such as air that have passed through both routes.

[0020] Furthermore, since the guide body is made by rolling a metal plate into a cylindrical shape and providing a flow passage inside, the fluid supplied from the supply unit can be circulated through the flow passage formed in the metal cylinder. In addition, by forming it by rolling a metal plate into a cylindrical shape, the diameter of the cylinder can be adjusted as needed, and a shape with a higher mixing effect can be achieved, such as by forming a spiral cross-sectional shape.

[0021] [5] The static fluid mixer of the present invention may be configured such that, in the static fluid mixer of [4] above, through holes that penetrate both the front and back surfaces are provided at predetermined locations on the metal plate.

[0022] In this case, since through holes are provided at predetermined locations on the metal plate, the fluid flowing through both the internal flow passage and the external gap of the guide body will enter and exit the flow passage and gap through the through holes. As a result, the incoming and outgoing fluids collide with the fluids passing through the flow passage and gap, creating turbulence, which further increases the efficiency of mixing.

[0023] [6] The static fluid mixer of the present invention may be configured such that, in the static fluid mixer of [5] above, a rising portion is provided along the edge of the through hole, protruding from the surface, back surface, or front and back surfaces.

[0024] Here, if the rising section is provided on the "front surface," "back surface," or "front and back surfaces," the fluid will collide with the rising section, creating turbulence and further increasing the mixing efficiency. Also, if the rising section is provided on the "front surface (excluding the area corresponding to the outer surface of the cylinder)," "back surface," or "front and back surfaces," when the cylinder is formed into a spiral cross-sectional shape, the rising section acts as a spacer, ensuring the formation of spacing between each layer of the spiral. Furthermore, if the rising section is provided on the "front surface (limited to the area corresponding to the outer surface of the cylinder)," the rising section acts as a spacer, ensuring the formation of a gap between it and the inner surface of the pipe.

[0025] [7] The static fluid mixer of the present invention may be configured such that, in the static fluid mixer of [1] or [4] above, spiral projections or spiral grooves are provided on the inner circumferential surface of the pipe body in a spiral manner from the supply section toward the discharge section.

[0026] In this case, spiral ridges or grooves are provided on the inner surface of the pipe, extending from the supply section to the discharge section. This allows the fluid passing through the gap to be guided in a spiral pattern along the spiral ridges or grooves. Furthermore, the fluid guided by the spiral ridges or grooves becomes turbulent upon contact with the ridges or grooves, further increasing the mixing efficiency.

[0027] [8] The static fluid mixer of the present invention may be configured such that, in the static fluid mixer of [1] or [4] above, a groove is provided on the inner circumferential surface of the pipe body in a linear manner in the longitudinal direction from the supply section to the discharge section.

[0028] In this case, since grooves are provided on the inner circumference of the pipe in a linear direction from the supply section to the discharge section, the fluid passing through the gap can be guided in a linear direction along the linear grooves. Furthermore, this linear fluid flow can create turbulence through contact with fluids whose flow directions intersect, such as a spiral flow, thereby further improving mixing efficiency.

[0029] [9] In order to achieve the above objective, the present invention provides a stationary fluid mixer in which a pipe has a linear central flow path having a fluid supply section and a fluid discharge section at both ends in the longitudinal direction, the inner circumferential surface forming the central flow path is provided with spiral projections extending spirally from the supply section to the discharge section, and grooves provided at predetermined locations in the circumferential direction of the inner circumferential surface, intersecting the spiral projections and provided in the longitudinal direction of the pipe.

[0030] The stationary fluid mixer of the present invention can circulate fluid through a straight central channel provided in a pipe. The fluid is supplied into the central channel from a fluid supply section located at one end of the central channel in the longitudinal direction, and discharged to the outside of the central channel from a discharge section located at the other end. A portion of the fluid circulating within the central channel from the supply section to the discharge section flows substantially straight through the approximate center of the central channel.

[0031] Furthermore, another portion of the fluid flows along the inner surface that forms the central channel. At this time, the fluid is guided by spiral ridges provided on the inner surface and flows in a spiral pattern. The fluid flowing straight through the central channel and the fluid flowing in a spiral pattern repeatedly collide with each other at their boundary, creating turbulence and mixing, which is then discharged from the outlet.

[0032] Furthermore, grooves are provided at predetermined points along the circumferential direction of the inner surface, intersecting the spiral ridges and running along the length of the pipe. This creates a new flow in the circulating fluid that intersects with the spiral ridges and flows linearly through the grooves. As a result, in addition to the flow that flows straight through the central channel, the linear flow through the grooves collides with the spiral-flowing fluid at even more points, leading to more efficient fluid mixing.

[0033]

[10] In order to achieve the above objective, the present invention provides a stationary fluid mixer in which a pipe has a linear central flow path having a fluid supply section and a fluid discharge section at both ends in the longitudinal direction, the inner circumferential surface forming the central flow path is provided with a spiral groove that extends spirally from the supply section to the discharge section, and grooves provided at predetermined locations in the circumferential direction of the inner circumferential surface, intersecting the spiral groove and provided in the longitudinal direction of the pipe.

[0034] The stationary fluid mixer of the present invention can circulate fluid through a straight central channel provided in a pipe. The fluid is supplied into the central channel from a fluid supply section located at one end of the central channel in the longitudinal direction, and discharged to the outside of the central channel from a discharge section located at the other end. A portion of the fluid circulating within the central channel from the supply section to the discharge section flows substantially straight through the approximate center of the central channel.

[0035] Furthermore, another portion of the fluid flows along the inner surface that forms the central channel. At this time, the fluid is guided into spiral grooves provided on the inner surface and flows in a spiral pattern. The fluid flowing straight through the central channel and the fluid flowing in a spiral pattern repeatedly collide with each other at their boundary, creating turbulence and mixing, which is then discharged from the discharge section.

[0036] Furthermore, grooves provided at predetermined locations along the circumferential direction of the inner surface, intersecting the helical grooves and running along the length of the pipe, create a new linear flow in the circulating fluid that intersects the helical grooves and flows through the grooves. As a result, in addition to the flow that flows straight through the central channel, the linear flow through the grooves collides with the spiral-flowing fluid at even more points, leading to more efficient fluid mixing.

[0037]

[11] In order to achieve the above objective, the present invention provides a stationary fluid mixer comprising: a pipe having a linear internal space with a fluid supply section and a fluid discharge section at both ends in the longitudinal direction; and a guide body housed in the internal space of the pipe, having spiral projections on its outer circumference extending from the supply section to the discharge section, with a gap of a predetermined size between the tip of the spiral projections and the inner circumferential surface forming the internal space of the pipe, and grooves provided at predetermined locations in the circumferential direction of the outer circumference, intersecting the spiral projections in the longitudinal direction.

[0038] The stationary fluid mixer of the present invention allows fluid to flow through the gap between the inner circumferential surface forming the internal space of the pipe and the tip of the spiral projection of the guide body housed in the internal space, as well as the space formed along the spiral projection, within the linear internal space of the pipe. The fluid is supplied to the gap and space from a fluid supply section located at one end of the internal space in the longitudinal direction, and discharged to the outside of the internal space from a discharge section located at the other end.

[0039] At this time, a portion of the fluid flowing from the supply section to the discharge section through the gap and space flows almost straight through the gap, while another portion flows in a spiral pattern through the space. The fluid flowing almost straight through the gap and the fluid flowing in a spiral pattern through the space repeatedly collide with each other at their boundary, creating turbulence, which is then mixed and discharged from the discharge section.

[0040] Furthermore, because grooves are provided longitudinally at predetermined circumferential points on the outer circumference, intersecting the spiral ridges, a new flow is created in the circulating fluid that intersects with the spiral grooves and flows linearly through them. As a result, in addition to the flow that flows almost straight through the gaps, the linear flow through the grooves collides with the spiral-flowing fluid at even more points, leading to more efficient fluid mixing.

[0041]

[12] The stationary fluid mixer of the present invention may be configured such that, in the stationary fluid mixer of the present invention described in

[11] above, the gap between the tip of the spiral projection and the inner surface of the pipe body is formed to be of different sizes near the supply section and near the discharge section.

[0042] In this case, the gap between the tip of the protrusion and the inner surface of the pipe body is of different sizes near the supply and discharge sections. Therefore, when fluid is supplied from the supply section at a constant pressure, the internal pressure is more likely to fluctuate due to the difference in gap size. For example, the pressure will be higher where the gap is narrower, which can lead to more efficient mixing.

[0043]

[13] To achieve the above object, the present invention provides a method for mixing fluids, which includes: a linear inner space having fluid supply and discharge portions at both ends in the length direction; a gap between the inner peripheral surface of a tubular body having the linear inner space and the outer peripheral portion of a guiding body disposed inside the tubular body, the guiding body having a nut block formed by connecting a required number of nuts in the thickness direction; and a flow path formed by the screw holes of each nut. Fluid is caused to flow from the supply portion to the discharge portion through the gap and the flow path in the length direction of the tubular body, and is circulated through both routes of the inflow / outflow that enters and exits between the gap and the flow path.

[0044] The fluid mixing method of the present invention can create a flow in the length direction of the tubular body through the gap and the flow path from the fluid supply portion to the discharge portion between the inner peripheral surface of the tubular body having a linear inner space with fluid supply and discharge portions at both ends in the length direction and the outer peripheral portion of a guiding body disposed inside the tubular body. At the same time, an inflow / outflow that enters and exits between the gap and the flow path can be created.

[0045] Thus, by circulating through both routes, i.e., the flow in the length direction of the tubular body through the gap and the flow path and the inflow / outflow that enters and exits between the gap and the flow path, the fluid is separated and flows through the flow path inside the guiding body and the gap outside the guiding body on the supply portion side, and then merges on the discharge portion side while creating an inflow / outflow between the gap and the flow path. As a result, fluids such as combustible gas and air that have passed through both routes can be efficiently mixed and activated.

[0046] Further, since the guiding body has a nut block formed by connecting a required number of nuts in the thickness direction and the flow path is formed by the screw holes of each nut, the fluid flowing through the flow path is guided in a substantially spiral shape along the helix of the thread by the thread forming the screw hole and circulates. Thereby, the fluid becomes a turbulent flow even inside the flow path, and the mixing at the discharge portion can be performed more efficiently.

[0047]

[14] To achieve the above object, the present invention provides a method for mixing fluids, comprising: an inner peripheral surface of a tubular body having a linear internal space with fluid supply and discharge portions at both ends in the longitudinal direction; a gap between the outer peripheral portion of a guiding body disposed inside the tubular body, the guiding body being formed by rolling a metal plate into a cylindrical shape with a flow passage provided therein; and a flow passage provided inside the guiding body. Fluid is caused to flow from the supply portion to the discharge portion through the gap and the flow passage along the longitudinal direction of the tubular body, and is circulated through both routes of the in-and-out flow that enters and exits between the gap and the flow passage.

[0048] The fluid mixing method of the present invention can create a flow along the longitudinal direction of the tubular body through the gap between the inner peripheral surface of the tubular body having a linear internal space with fluid supply and discharge portions at both ends in the longitudinal direction and the outer peripheral portion of the guiding body disposed inside the tubular body, and through the flow passage provided inside the guiding body. At the same time, an in-and-out flow that enters and exits between the gap and the flow passage can be created.

[0049] Thus, by circulating through both routes, i.e., the flow along the longitudinal direction of the tubular body through the gap and the flow passage, and the in-and-out flow that enters and exits between the gap and the flow passage, the fluid is separated and flows through the flow passage inside the guiding body and the gap outside the guiding body on the supply portion side, and then merges on the discharge portion side while creating an in-and-out flow between the gap and the flow passage. As a result, fluids such as combustible gas and air passing through both routes can be efficiently mixed and activated.

[0050] Further, since the guiding body is formed by rolling a metal plate into a cylindrical shape with a flow passage provided therein, the fluid supplied from the supply portion can be circulated through the flow passage formed in the metal cylindrical body. In addition, by rolling the metal plate into a cylindrical shape, the diameter of the cylindrical body can be appropriately adjusted, and moreover, a shape with a higher mixing effect, such as a spiral cross-sectional shape, can be formed.

[0051]

[15] In order to achieve the above objective, the present invention is a fluid mixing method in which, in the central flow path of a pipe, the fluid flows from a fluid supply section to a discharge section via both a straight flow in the longitudinal direction of the pipe through the central flow path and a helical flow along the inner circumferential surface forming the central flow path, and the fluid flows in a direction intersecting the helical flow and in the longitudinal direction of the pipe.

[0052] The fluid mixing method of the present invention creates and circulates a straight flow of fluid along the length of the pipe through the central channel, from the fluid supply to the discharge. Furthermore, a helical flow (or swirling flow) of fluid is created and circulated along the inner circumferential surface forming the central channel. The fluid flowing straight through the central channel and the fluid flowing in a helical pattern repeatedly collide at the boundary between their respective routes, resulting in turbulent mixing. Additionally, by circulating the fluid in a direction intersecting the helical flow and along the length of the pipe, the number of routes intersecting the helical flow increases, thus increasing the number of collision points along each route and enabling more efficient fluid mixing.

[0053]

[16] In order to achieve the above objective, the present invention is a fluid mixing method that causes the fluid to flow in the space between the outer circumference of a guide body disposed inside the pipe and the inner surface of the pipe, from a fluid supply section to a discharge section, via both a straight flow in the longitudinal direction of the pipe passing through the space and a helical flow passing along the outer circumference, so that the fluid flows in a direction intersecting the helical flow and in the longitudinal direction of the pipe.

[0054] The fluid mixing method of the present invention creates and circulates a linear flow of fluid along the length of the pipe, from the fluid supply section to the discharge section, in the space between the outer circumference of a guide body placed inside the pipe and the inner circumference of the pipe. Furthermore, a helical flow of fluid can be created and circulated along the outer circumference of the guide body.

[0055] In this way, a portion of the fluid flowing through the space from the supply to the discharge point flows almost straight along the length of the pipe, while another portion flows in a spiral pattern within the space. The fluid flowing almost straight and the fluid flowing in a spiral pattern repeatedly collide at their boundary, creating turbulence and mixing. Furthermore, by directing the fluid to flow in a direction intersecting the spiral flow and along the length of the pipe, the number of routes for the fluid intersecting the spiral flow increases, thus increasing the number of collision points along each route and allowing for more efficient fluid mixing.

[0056]

[17] The fluid mixing method of the present invention also allows different types of fluids to be circulated simultaneously inside the pipe, in the fluid mixing method of

[15] or

[16] described above.

[0057] In this case, different types of fluids are circulated simultaneously inside the pipe, making it possible to mix fluids in any combination. Therefore, it can flexibly respond to mixing requirements in various fields and is extremely useful as a stationary mixer for fluids.

[0058] In this invention, the terms mixer and mixing are used to encompass both the meaning of mixing multiple fluids of different types and the meaning of stirring a single fluid.

[0059] The present invention provides a stationary fluid mixer and a fluid mixing method that can more efficiently mix and activate a fluid such as a flammable gas and air, for use in applications such as pressure welding torches.

[0060] This is an explanatory diagram of a pressure welding torch using the fluid stationary mixer of the present invention. This is a cross-sectional explanatory diagram showing the first embodiment of the fluid stationary mixer of the present invention. This is a cross-sectional view of the fluid stationary mixer of Figure 2 taken along the line X-X. This is a perspective explanatory diagram of the guide body made of a nut block of the fluid stationary mixer of Figure 2. This is a cross-sectional explanatory diagram showing the second embodiment of the fluid stationary mixer of the present invention. This is a cross-sectional view of the fluid stationary mixer of Figure 5 taken along the line Y-Y. This is a plan view of the metal plate forming the guide body of the fluid stationary mixer of Figure 5. This is a perspective explanatory diagram of the guide body made of a metal plate of the fluid stationary mixer of Figure 5. This is an explanatory diagram showing the third embodiment of the fluid stationary mixer of the present invention. This is an explanatory diagram showing a modified example of the third embodiment of the fluid stationary mixer of the present invention. This is an explanatory diagram showing the fourth embodiment of the fluid stationary mixer of the present invention. This is an explanatory diagram showing the first modified example of the fourth embodiment of the fluid stationary mixer of the present invention. This is an explanatory diagram showing the second modified example of the fourth embodiment of the fluid stationary mixer of the present invention. This is an explanatory diagram showing variations in the usage location of the fluid stationary mixer of the present invention in a pressure welding torch.

[0061] Embodiments of the present invention will be described in more detail with reference to Figures 1 to 14. First, the welding torch 9 shown in Figure 1 is used to heat the welding portion of a steel material for welding steel materials. The welding torch 9 has a gas inlet pipe 90. The gas inlet pipe 90 consists of a base inlet pipe 90a and a tip inlet pipe 90b, and a combustible gas supply pipe 91 and an oxygen supply pipe 92, both having valves (reference numerals omitted), are connected to the base inlet pipe 90a so as to be able to merge.

[0062] A stationary fluid mixer A according to the present invention is installed between the base inlet pipe 90a and the tip inlet pipe 90b. A U-shaped branch pipe 93 is connected to the tip of the tip inlet pipe 90b, and burner pipes 94 and 95 are connected to both ends of the branch pipe 93, facing each other. Multiple nozzle pipes 96 are attached to the burner pipes 94 and 95, respectively, facing inward (towards the center on the same plane).

[0063] (Standing Fluid Mixer A1) Figures 2, 3, and 4 show a first embodiment of the standing fluid mixer of the present invention, which is a standing fluid mixer A1. The standing fluid mixer A1 is equipped with a metal (brass in this embodiment) tube 1. The tube 1 has a predetermined length and an outer shape of a hexagonal prism. Inside the tube 1, an inner circumferential surface 19 is formed, which forms an internal space 4 in the shape of a circular hole in the center and is linear in the longitudinal direction.

[0064] In the pipe body 1, the interiors of the base inlet pipe 90a and the tip inlet pipe 90b, which are connected to the internal space 4 at both ends in the longitudinal direction, form a supply passage 901 for supplying fluid and a discharge passage 902 for discharging fluid. The tip 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 (not shown), and the tip of the tip inlet pipe 90b is connected to the discharge side (left side in Figure 2(a)) via a tapered screw (not shown). As a result, the supply passage 901 and the discharge passage 902 are in communication with the internal space 4.

[0065] Furthermore, spiral blades 10a and 10b, which form protrusions along the entire length of the internal space 4, are provided on the inner circumferential surface 19 at a predetermined pitch. The spiral blades 10a and 10b are double screws, and by widening the pitch compared to a single screw, the fluid is made to flow more easily and at higher speed with less resistance. Alternatively, instead of providing spiral blades 10a and 10b, a structure can be provided with spiral grooves (not shown) at the same positions.

[0066] In this case, the pitch of the helical blades 10a, 10b and the helical grooves is not particularly limited. Also, although a double screw is used in this embodiment, triple, quadruple, or other multi-layered screws may be used. Furthermore, the cross-sectional shape of the groove (or the part forming the groove) is not particularly limited and can be, for example, semicircular, U-shaped, V-shaped, etc. Similarly, it goes without saying that the cross-sectional shape of the ridge is not particularly limited.

[0067] Furthermore, the angle of the spiral in the spiral vanes 10a, 10b and the spiral groove is not particularly limited. If the spiral angle with respect to the axis of the pipe 1 is too large, spiral flow of the fluid circulating inside becomes difficult, so the fluid flow velocity tends to slow down, and the fluid pressure does not increase easily when fluids collide with each other. For this reason, it works unfavorably in fluid activation (clustering).

[0068] Conversely, if the helical angle with respect to the axis of the pipe 1 is too small, helical flow is more likely to occur, so the fluid flow velocity will increase and the pressure during collisions between fluids will also increase, which is advantageous for fluid activation. The helical angle is set within a range of, for example, 10 to 60° (in reality, the angle will be appropriate as it is related to the amount of protrusion of the helical vanes 10a and 10b and the depth of the helical groove), but it is not particularly limited.

[0069] Furthermore, grooves 11 of a predetermined width and depth are provided on the inner circumferential surface 19, along with the helical blades 10a and 10b, in the longitudinal direction of the tube 1. The grooves 11 are provided in three locations on the circumferential direction of the inner circumferential surface 19, parallel to each other and spaced 120° apart (see Figure 3). In addition, each groove 11 is formed by cutting out the helical blades 10a and 10b that overlap with the groove 11 to form a notch 13. The number of grooves 11 is not particularly limited and can be set as appropriate.

[0070] Furthermore, in this embodiment, each groove 11 is provided by cutting out the inner circumferential surface 19 and the helical blades 10a and 10b, but this is not the only way to go. For example, the groove may be provided by cutting out only the helical blades 10a and 10b without providing a groove in the inner circumferential surface 19. If the structure is designed with grooves (not shown) arranged in a spiral shape instead of providing the helical blades 10a and 10b, the grooves 11 may be provided so as to intersect the spiral grooves at the same depth.

[0071] A guide body 3 is housed in the center of the internal space 4 (inside the spiral vanes 10a and 10b). The guide body 3 is made up of three nut blocks 300 arranged in parallel, each formed by connecting a required number of nuts 35 (hexagonal nuts) in the thickness direction with wires 36 passed through screw holes 350 (see Figure 4) to create a predetermined length. As a result, each nut block 300 has a flow passage 37 (see Figure 4) made of screw holes 350 that is the same length as the nut block 300.

[0072] Furthermore, the three nut clusters 300 are twisted together in the circumferential direction. As a result, a gentle spiral groove-like recess (notation omitted) is formed on the outer circumference of the guide body 3, causing the space between each nut 35 to loosen slightly and creating irregular gaps (notation omitted) between each nut 35. The diameter of the guide body 3 is made to fit approximately within the inner diameter of the tips of the spiral blades 10a and 10b, and after being housed, it is substantially fixed in place by the frictional force with the spiral blades 10a and 10b (see Figure 4).

[0073] Furthermore, when housing the guide body 3 in the center of the internal space 4, first, the excess length 360 of the wire 36 is inserted into the internal space 4 from the fluid supply side of the pipe 1, the nut block 300 is pushed in slightly, and then the excess length 360 coming out from the discharge side is pulled to house it in an appropriate position in the internal space 4. In this embodiment, for the sake of illustration, the guide body 3 is positioned to the right in the internal space 4, but in reality, it is positioned throughout the entire internal space 4.

[0074] As a result, a gap 40 is formed between the guide body 3 and the inner circumferential surface 19. The gap 40 consists of the space (notation omitted) formed between the inner circumferential surface 19 and the outer periphery of the guide body 3 between the helical vanes 10a and 10b.

[0075] (Operation) The operation of the stationary fluid mixer A1 will be explained with reference to Figures 2 to 4. Figure 2(a) is a cross-sectional diagram of the stationary fluid mixer A1, and Figure 2(b) is a diagram showing the fluid flow at the position of the cross-sectional line in Figure 2(a) during mixing.

[0076] In the following description of mixing using the static fluid mixer A1, we will use acetylene gas (C2H2) and oxygen gas (O2) mixed in a predetermined ratio as an example of the fluid to be mixed, but we are not limited to this. Examples of fluids that can be mixed include various gases, various liquids, and fluid solids such as various powders. Furthermore, the applications of the fluid are not limited to gases used in heating equipment such as various industrial torches, but can also be used for mixing various gases for medical purposes, for example.

[0077] Furthermore, during mixing, the acetylene gas and oxygen gas supplied to the static fluid mixer A1 may undergo primary mixing when passing through the supply passage 901, or upstream thereof, or they may be mixed simultaneously with the mixing process after being supplied to the pipe 1. The same applies to the static fluid mixers A2, A3, A3-1, A4, A4-1, and A4-2, which are described below.

[0078] In the static fluid mixer A1, the fluid, which is a mixture of acetylene gas and oxygen gas, is supplied through the supply passage 901, which is the fluid supply section, to each flow passage 37 of the guide body 3 located in the center of the pipe body 1. In addition, a portion (or a large portion) of the fluid is supplied to the gap 40.

[0079] The fluid flowing through each flow passage 37 is guided by the screw threads as it passes through the screw holes 350, becoming a helical flow g1 (the pitch of the helix does not necessarily coincide with the pitch of the screw threads). This helical flow g1 occurs within each of the three flow passages 37, and while being mixed, it is sent from the discharge side of each flow passage 37 to the discharge passage 902 (see Figures 2(a) and (b)).

[0080] Furthermore, the fluid supplied to the gap 40 becomes a helical flow g2, which is a combination of a helical flow along the recess on the outer circumference caused by the twisting of the nut mass 300 and a helical flow along the helical blades 10a and 10b, and a straight linear flow g3 along the groove 11. Since the directions of these flows intersect, they repeatedly collide with each other at their boundary, becoming turbulent and being mixed together before being sent to the discharge passage 902.

[0081] Furthermore, the gaps between each nut 35 are mixed with the helical flow g1 flowing through the flow passage 37 and the helical flow g2 and straight flow g3 flowing through the gap 40 by the pressure of these two flows g4, and are sent to the discharge passage 902. In the enlarged view of Figure 2(b), the nut mass 300 having flow passages 37 formed by the screw holes 350 inside each nut 35 is represented by a double dotted line (dashed line).

[0082] The helical flows g1, g2, the linear flow g3, and the inlet / outlet flows g4 are then merged and efficiently mixed upon entering the discharge passage 902, and discharged outside the static fluid mixer A1 through the discharge passage 902 (see Figures 2(a) and 2(b)).

[0083] Furthermore, since the fluid velocity during mixing is adjusted to be sufficiently high, the acetylene gas and oxygen gas that make up the fluid are efficiently mixed under high pressure and can be fully activated. The same applies to the static fluid mixers A2, A3, A3-1, A4, A4-1, and A4-2, which are described below.

[0084] (Standing Fluid Mixer A2) Figures 5 to 8 show a second embodiment of the standing fluid mixer of the present invention, which is a standing fluid mixer A2. The standing fluid mixer A2 is equipped with a metal tube 1. The tube 1 has the same structure as the tube 1 of the standing fluid mixer A1 described above, so we will refer to that explanation and omit a detailed explanation here. In Figure 5, the same parts as in the tube 1 of Figure 2 are denoted by the same reference numerals.

[0085] A guide body 3a is housed in the central part of the internal space 4 of the static fluid mixer A2 (inside the spiral blades 10a and 10b). The guide body 3a is formed by processing a metal plate 38 (made of copper in this embodiment). Specifically, the plate 38 has a roughly trapezoidal shape in plan view, 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).

[0086] The plate body 38 is provided with a required number of through-holes 39a and 39b that penetrate through both the front and back sides. Each through-hole 39a is a through-hole cut open from the front side (the side visible in Figure 7) to the back side, and each through-hole 39b is a through-hole cut open from the back side to the front side. As a result, the plate body 38 has a large number of through-holes 39a and 39b formed alternately at regular intervals in the up, down, left, and right directions.

[0087] As a result, a rising portion 390 is formed that protrudes to the back side along the edge of each through-hole 39a, and a rising portion 390 is formed that protrudes to the front side along the edge of the through-hole 39b (see Figures 7, 8, and Figure 5(a) described later). In this embodiment, the rising portions 390 protrude to both the front and back sides, but it is also possible to provide only through-holes 39a with rising portions 390 protruding to the back side, or only through-holes 39b with rising portions 390 protruding to the front side.

[0088] The guide body 3a is formed by rolling a plate 38 to an appropriate diameter so that round openings are formed on the long side and the short side. As a result, the plate 38 becomes a cylindrical body, 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 substantially straight flow passage 30 in the longitudinal direction is formed inside.

[0089] The guide body 3a is housed in the center of the internal space 4 of the static fluid mixer A2, with the supply port 301 on the base inlet pipe 90a side and the discharge port 302 on the front inlet pipe 90b side. After being housed, it is substantially fixed in place by the frictional force with the helical blades 10a and 10b. The guide body 3a is housed so that its diameter narrows towards the discharge side, causing the pressure on the discharge side within the flow passage 30 to increase. The guide body 3a can also be formed to have a uniform diameter throughout.

[0090] Furthermore, the guide body 3a has a spiral cross-sectional shape, and the two protruding risers 390 on the outer and inner surfaces work together to ensure the formation of spacing between each layer of the spiral (see Figure 8). Also, when the guide body 3a is contained within the internal space 4, the risers 390 protruding from the outer surface (surface side) contact the spiral blades 10a and 10b and the head of the inner surface 19, so that the risers 390 act as spacers, ensuring the formation of a gap 40 between the guide body 3a and the inner surface 19 of the pipe body 1.

[0091] (Operation) The operation of the stationary fluid mixer A2 will be explained with reference to Figures 5 to 8. Figure 5(a) is a cross-sectional diagram of the stationary fluid mixer A2, and Figure 5(b) is a diagram illustrating the fluid flow at the cross-sectional line position in Figure 5(a) during mixing.

[0092] In the static fluid mixer A2, the fluid, which is a mixture of acetylene gas and oxygen gas, is supplied through the supply passage 901, which is the fluid supply section, and through the supply port 301 to the flow passage 30 of the guide body 3a, which is located in the center of the pipe body 1. In addition, a portion (or a large portion) of the fluid is supplied to the gap 40.

[0093] The fluid flowing through the flow passage 30 is partially mixed upon contact with the swirling, layered inner wall (not shown) and the rising section 390, becoming a nearly straight flow g5, which is then discharged from the outlet 302 and sent to the discharge passage 902 (see Figures 5(a) and (b)).

[0094] Furthermore, the fluid supplied to the gap 40 becomes a straight stream g7 along the groove 11 and a helical flow g6 along the helical blades 10a and 10b. Since the directions of these flows intersect, they repeatedly collide with each other at their boundary, becoming turbulent and mixed before being sent to the discharge passage 902 (see Figure 5(b)).

[0095] Furthermore, the numerous incoming and outgoing flows g8 that move in and out between the gap 40 and the flow passage 30 are mixed together with the approximately straight flow g5, the helical flow g6, and the straight flow g7 as they pass through the through holes 39a and 39b of the guide body 3a, and sent to the discharge passage 902 (see enlarged view of Figure 5(b)).

[0096] The aforementioned nearly straight flow g5, spiral flow g6, straight flow g7, and inlet / outlet flow g8 then merge and efficiently mix upon entering the discharge passage 902, and are discharged to the outside of the stationary fluid mixer A2 through the discharge passage 902 (see Figures 5(a) and 5(b)). In the enlarged view of Figure 5(b), the guide body 3a, which has numerous through holes 39a and 39b in its peripheral wall, is represented by a dotted (dashed) line.

[0097] (Standing Fluid Mixer A3) Figure 9 shows a third embodiment of the standing fluid mixer of the present invention, which is a standing fluid mixer A3. The standing fluid mixer A3 is equipped with a metal (for example, brass) tube 1c. The tube 1c has a predetermined length and an outer shape of a hexagonal prism. Inside the tube 1c, an inner circumferential surface 19 (inner circumference) is formed, which forms a central flow path 100 that is circular in shape and linear in the longitudinal direction in the center.

[0098] In the pipe body 1c, the interiors of the base inlet pipe 90a and the tip inlet pipe 90b, which are connected to the central flow path 100 at both ends in the longitudinal direction, form a supply passage 901 for supplying fluid and a discharge passage 902 for discharging fluid. The tip of the base inlet pipe 90a is connected to the supply side of the pipe body 1c via a tapered screw (not shown), and the tip of the tip inlet pipe 90b is connected to the discharge side via a tapered screw (not shown). As a result, the supply passage 901 and the discharge passage 902 are in communication with the central flow path 100.

[0099] Furthermore, spiral blades 10a and 10b, which form protrusions along the entire length of the central flow path 100, are provided on the inner circumferential surface 19 at a predetermined pitch. The spiral blades 10a and 10b are double screws, and by widening the pitch compared to a single screw, the fluid is made to flow more easily and at higher speed with less resistance. Alternatively, instead of providing the spiral blades 10a and 10b, a structure with spiral grooves (not shown) can also be used.

[0100] The pitch of the helical blades 10a, 10b and the helical grooves in this case is not particularly limited. Furthermore, although a double screw is used in this embodiment, triple, quadruple, or other multi-layered screws may also be used.

[0101] Furthermore, the cross-sectional shape of the groove (or the part forming the groove) is not particularly limited and can be, for example, semi-circular, U-shaped, V-shaped, etc. Similarly, it goes without saying that the cross-sectional shape of the ridge is also not particularly limited.

[0102] Furthermore, the angle of the spiral in the spiral vanes 10a, 10b and the spiral groove is not particularly limited. If the spiral angle with respect to the axis of the pipe body 1c is too large, spiral flow of the fluid circulating inside becomes difficult, so the fluid flow velocity tends to slow down, and the fluid pressure does not increase easily when fluids collide with each other. For this reason, it works unfavorably in fluid activation (clustering).

[0103] Conversely, if the helical angle of the pipe body 1c with respect to the axis is too small, helical flow is more likely to occur, resulting in a faster fluid flow velocity and higher pressure during collisions between fluids, which is advantageous for fluid activation. The helical angle is set within a range of, for example, 10 to 60° (in reality, the angle will be appropriate as it depends on the protrusion amount of the helical vanes 10a and 10b and the depth of the helical groove), but it is not particularly limited.

[0104] (Operation) The operation of the stationary fluid mixer A3 will be explained with reference to Figure 9. Figure 9(a) is a cross-sectional diagram of the stationary fluid mixer A3, and Figure 9(b) is a diagram illustrating the fluid flow at the cross-sectional line position in (a) during mixing.

[0105] The fluid, which is a mixture of acetylene gas and oxygen gas, passes through the supply passage 901, which is the fluid supply section of the static fluid mixer A3, and is supplied to the central flow path 100 located in the center of the pipe 1c. Then, a portion (or a large portion) of the fluid flows in a substantially straight line along the central flow path 100 (flow g9 in Figure 9(b)).

[0106] Furthermore, another portion of the fluid flows along the inner circumferential surface 19 of the pipe body 1c that forms the central flow path 100 and along the helical vanes 10a and 10b, and is guided by the helical vanes 10a and 10b to flow in a spiral pattern, becoming a helical flow (flow g10 in Figure 9(b)).

[0107] Then, the fluid flowing straight through the central channel 100 in the direction g9 and the fluid flowing in a spiral in the direction g10 intersect in their flow directions. As a result, they repeatedly collide with each other at the boundary, creating turbulence and mixing, which is then discharged to the outside of the static fluid mixer A3 through the discharge channel 902, which is the discharge section.

[0108] Furthermore, since the fluid velocity during mixing is adjusted to be sufficiently high, the acetylene gas and oxygen gas that make up the fluid can be efficiently mixed under high pressure and fully activated.

[0109] (Standing Fluid Mixer A3-1) Figure 10 shows a modified example of the standing fluid mixer A3 of the present invention, namely the standing fluid mixer A3-1. In addition to the configuration of the standing fluid mixer A3 described above, the standing fluid mixer A3-1 has grooves 11 of a predetermined width and depth provided on the inner circumferential surface 19 in the longitudinal direction of the pipe body 1a.

[0110] The grooves 11 are provided in four locations on the inner circumferential surface 19, parallel to each other and spaced at 90° intervals. In addition, each groove 11 is formed by cutting out the helical blades 10a and 10b located in the position overlapping with the groove 11 to form a notch 13. The number of grooves 11 is not particularly limited and can be set as appropriate.

[0111] Furthermore, in this embodiment, each groove 11 is provided by cutting out the inner circumferential surface 19 and the helical blades 10a and 10b, but this is not the only way to go. For example, the groove may be provided by cutting out only the helical blades 10a and 10b without providing a groove in the inner circumferential surface 19. If the structure is designed with grooves (not shown) arranged in a spiral shape instead of providing the helical blades 10a and 10b, the grooves 11 may be provided so as to intersect the spiral grooves at the same depth.

[0112] (Operation) The operation of the stationary fluid mixer A3-1 will be explained with reference to Figure 10. Figure 10(a) is a cross-sectional diagram of the stationary fluid mixer A3-1, and Figure 10(b) is a diagram showing the fluid flow at the cross-sectional line position in (a) during mixing.

[0113] The static fluid mixer A3-1 operates in the same way as the static fluid mixer A3, due to its similar configuration. Specifically, the fluid supplied from the supply channel 901 flows straight through the central channel 100 in the direction g9, and the fluid flows in a spiral in the direction g10. Because their flow directions intersect, they repeatedly collide at the boundary, creating turbulence which is then mixed. The mixture is then discharged to the outside of the static fluid mixer A3-1 through the discharge channel 902, which is the discharge section.

[0114] Furthermore, in the stationary fluid mixer A3-1, the fluid flowing through the central channel 100 has newly generated flows: a flow that flows linearly through each notch 13 of each helical blade 10a and 10b, and a flow that flows linearly through each notch 13 and overlapping groove 11 (flow g11 in Figure 10(b)). As a result, in addition to the linear flow g9 of the fluid flowing approximately through the center of the central channel 100, four linear flows g11 are added, further increasing the number of points where they collide with the spiral flow g10. This makes the fluid mixing more efficient.

[0115] (Standing Fluid Mixer A4) Figure 11 shows a fourth embodiment of the standing fluid mixer of the present invention, which is a standing fluid mixer A4. The standing fluid mixer A4 is equipped with a metal tube 1b. The tube 1b has a predetermined length and an outer shape of a hexagonal prism. Inside the tube 1b, an inner circumferential surface 19 (inner circumference) is formed, which forms an internal space 4 in the shape of a circular hole in the center and is linear in the longitudinal direction.

[0116] In the pipe body 1b, the interiors of the base inlet pipe 90a and the tip inlet pipe 90b, which are connected to the internal space 4 at both ends in the longitudinal direction, form a supply passage 901 for supplying fluid and a discharge passage 902 for discharging fluid. The tip of the base inlet pipe 90a is connected to the supply side of the pipe body 1b via a tapered screw (not shown), and the tip of the tip inlet pipe 90b is connected to the discharge side via a tapered screw (not shown). As a result, the supply passage 901 and the discharge passage 902 are in communication with the internal space 4.

[0117] A guide body 3b is housed in the center of the internal space 4. The guide body 3b is a linear, substantially round rod shape with a predetermined diameter. The guide body 3b is provided with conical guide sections 31 and 32 at both ends in the longitudinal direction to assist the flow of the fluid. The guide body 3b is fixed to the base inlet pipe 90a and the tip inlet pipe 90b in a structure that allows fluid to flow, with the guide sections 31 and 32 housed in the supply passage 901 and the discharge passage 902.

[0118] Furthermore, the outer surface 39 of the guide body 3b is provided with helical blades 30a and 30b forming protrusions along its entire length at a predetermined pitch. The helical blades 30a and 30b are double screws, and by widening the pitch compared to a single screw, the fluid is made to flow more easily and at higher speed with less resistance. Alternatively, instead of providing the helical blades 30a and 30b, a structure with helical grooves (not shown) can be provided.

[0119] As a result, a space 40 is provided between the guide body 3b and the inner circumferential surface 19. The space 40 is composed of the space between the helical blades 30a and 30b (reference numerals omitted) and a gap 400 of a predetermined width provided between the inner circumferential surface 19 that forms the internal space 4 of the tube body 1b and the space between the helical blades 30a and 30b and the inner circumferential surface 19 that forms the internal space 4 of the tube body 1b.

[0120] (Operation) The operation of the stationary fluid mixer A4 will be explained with reference to Figure 11. Figure 11(a) is a cross-sectional diagram of the stationary fluid mixer A4, and Figure 11(b) is a diagram showing the fluid flow at the cross-sectional line position in (a) during mixing.

[0121] The fluid, which is a mixture of acetylene gas and oxygen gas, is supplied through the supply passage 901, which is the fluid supply section of the static fluid mixer A4, to the internal space 4 located in the center of the pipe 1b. A portion of the fluid then flows in a nearly straight line along the inner circumferential surface 19 of the pipe 1b and the gap 400 (flow g13 in Figure 11(b)).

[0122] Furthermore, another portion of the fluid flows through the space 40 along the helical vanes 30a and 30b and the inner circumferential surface 19, and is guided by the helical vanes 30a and 30b to flow in a spiral pattern, becoming a helical flow (flow g12 in Figure 11(b)).

[0123] Then, the fluid flowing in a nearly straight line along the inner circumferential surface 19 of the pipe body 1b and the gap 400, and the fluid flowing in a spiral direction g12, have intersecting flow directions. As a result, they repeatedly collide with each other at the boundary, creating turbulence and mixing, which is then discharged to the outside of the stationary fluid mixer A4 through the discharge passage 902, which is the discharge section.

[0124] Furthermore, since the fluid velocity during mixing is adjusted to be sufficiently high, the acetylene gas and oxygen gas that make up the fluid can be efficiently mixed under high pressure and fully activated.

[0125] (Standing Fluid Mixer A4-1) Figure 12 shows a first modified example of the A4 of the standing fluid mixer of the present invention, which is a standing fluid mixer A4-1. In addition to the configuration of the standing fluid mixer A4 described above, the standing fluid mixer A4-1 has grooves 34 of a predetermined width and depth in the longitudinal direction on the outer circumferential surface 39 of the guide body 3c.

[0126] The grooves 34 are provided in four locations on the outer surface 39 in the circumferential direction, parallel to each other and spaced at 90° intervals. In addition, each groove 34 has a notch 33 formed by cutting out the helical blades 30c and 30d that overlap with the groove 34. The number of grooves 34 is not particularly limited and can be set as appropriate.

[0127] Furthermore, in this embodiment, each groove 34 is provided by cutting out the outer circumferential surface 39 and the helical blades 30c and 30d, but this is not limited to this, and for example, grooves may be provided only by cutting out the helical blades 30c and 30d without providing grooves on the inner circumferential surface 19. In the case of a structure in which grooves (not shown) are provided in a helical shape without providing the helical blades 30c and 30d, the grooves 34 may be provided so as to intersect with the helical grooves at the same depth.

[0128] (Operation) The operation of the stationary fluid mixer A4-1 will be explained with reference to Figure 12. Figure 12(a) is a cross-sectional diagram of the stationary fluid mixer A4-1, and Figure 12(b) is a diagram showing the fluid flow at the cross-sectional line position in (a) during mixing.

[0129] The static fluid mixer A4-1 operates in the same manner as the static fluid mixer A4, due to its similar configuration. Specifically, the fluid supplied from the supply passage 901, flowing straight through the gap 400 in the direction of g13, and the fluid flowing in a spiral in the direction of g12, have intersecting flow directions. As a result, they repeatedly collide at the boundary between them, creating turbulence which is then mixed. The mixture is then discharged to the outside of the static fluid mixer A4-1 through the discharge passage 902, which is the discharge section.

[0130] Furthermore, in the stationary fluid mixer A4-1, the fluid flowing through the space 40 has newly generated flows: a linear flow passing through each notch 33 of each helical blade 30c, 30d, and a linear flow passing through each notch 33 and overlapping groove 34 (flow g14 in Figure 12(b)). As a result, in addition to the linear flow g13 of the fluid passing through the gap 400, four linear flows g14 are added, further increasing the number of points where they collide with the spiral flow g12. This makes the fluid mixing more efficient.

[0131] (Standing Fluid Mixer A4-2) Figure 13 shows a second modified example of the standing fluid mixer A4 of the present invention, which is a standing fluid mixer A4-2. The standing fluid mixer A4-2 is equipped with a pipe 1b having the same structure as the standing fluid mixer A4 described above.

[0132] A guide body 3d is housed in the center of the internal space 4 of the pipe body 1b. The guide body 3d is formed in a partially conical shape and is fixed to the base inlet pipe 90a and the tip inlet pipe 90b in a structure that allows fluid to flow, with the thicker end facing the supply passage 901 side.

[0133] Furthermore, spiral blades 30e and 30f are provided at a predetermined pitch along the entire length of the outer circumferential surface 39a of the guide body 3d. The spiral blades 30e and 30f are double screws, and by widening the pitch compared to a single screw, the fluid is made to flow more easily and at higher speed with less resistance. Alternatively, instead of providing the spiral blades 30e and 30f, a structure with spiral grooves (not shown) can be provided.

[0134] Furthermore, a space 40a is provided between the guide body 3d and the inner circumferential surface 19 of the pipe body 1b. The space 40a is composed of the space between the helical blades 30e and 30f (reference numerals omitted) and a gap 400a of a predetermined width provided between the space between the space 40a and the inner circumferential surface 19 that forms the internal space 4 of the pipe body 1b, extending along the entire length of the tips of the helical blades 30e and 30f. As a result, the space 40a differs in size between the space 41 near the supply passage 901 and the space 42 near the discharge passage 902, with space 42 being larger.

[0135] (Operation) The operation of the static fluid mixer A4-2 will be explained with reference to Figure 13. The operation of the static fluid mixer A4-2 is similar to that of the static fluid mixer A4, due to its substantially similar configuration.

[0136] In other words, the fluid supplied from the supply channel 901 flows almost straight through the gap 400a along the inner circumferential surface 19 in the direction of g13, and the fluid guided by the helical blades 30e and 30f flows in a spiral in the direction of g12. Because their flow directions intersect, they repeatedly collide with each other at the boundary, creating turbulence which is mixed together, and then discharged to the outside of the stationary fluid mixer A4-2 through the discharge channel 902, which is the discharge section.

[0137] Furthermore, the space 40a between the tips of the spiral blades 30e and 30f and the inner circumferential surface 19 of the pipe body 1b has different sizes in the space 41 near the supply passage 901 and the space 42 near the discharge passage 902, with space 42 being larger. As a result, when fluid is supplied from the supply passage 901 at a constant pressure, the difference in size between space 41 and space 42 causes the internal pressure to fluctuate more easily, for example, the pressure to be higher where the gap is narrower (space 41), which is expected to enable more efficient mixing.

[0138] Referring to Figure 14, variations in the application of the pressure welding torch for the static fluid mixer A4 will be explained. For convenience, the static fluid mixer A4 will be used as an example here, but the other static fluid mixers A1, A2, A3, A3-1, A4-1, and A4-2 can also be used in a similar manner.

[0139] Figure 14(a) shows a type in which acetylene gas and oxygen gas are supplied to a static fluid mixer A4, and the two are mixed inside the static fluid mixer A4 for mixing. Figure 14(b) shows a type in which only oxygen gas is mixed in the static fluid mixer A4 and then mixed with acetylene gas in the base inlet pipe 90a.

[0140] Furthermore, the type shown in Figure 14(c) is one in which only acetylene gas is mixed in a static fluid mixer A4 and then mixed with oxygen gas in the base inlet pipe 90a. In all of the above types, the activated mixture of acetylene gas and oxygen gas is ultimately supplied from the tip inlet pipe 90b.

[0141] Furthermore, the static fluid mixers A1 to A4-2 are not limited to use with the above-mentioned pressure welding torch, but can also be used as gas mixers positioned near the upstream side of the nozzle of other heating devices, such as gas burners used for welding.

[0142] The terms and expressions used in this specification and claims are for illustrative purposes only and are not limiting in any way, and there is no intention to exclude terms or expressions equivalent to the features and parts thereof described herein and in the claims. Furthermore, it goes without saying that various modifications are possible within the scope of the technical concept of the present invention.

[0143] A1 Stationary mixer for fluids 1 Tube 4 Internal space 40 Gap 10a, 10b Helical blades 11 Groove 13 Notch 3 Guide body 300 Nut block 35 Nut 350 Screw hole 36 Wire 360 ​​Excess length 37 Flow path A2 Stationary mixer for fluids 1 Tube 4 Internal space 40 Gap 10a, 10b Helical blades 11 Groove 13 Notch 3a Guide body 38 Plate 39a Through hole 39b Through hole 390 Riser 301 Supply port 302 Discharge port A3 Stationary mixer for fluids 1c Tube 100 Central flow path 901 Supply path 902 Discharge path 10a, 10b Helical blades A3-1 Stationary mixer for fluids 1a Pipe 11 Groove 13 Notch A4 Stationary mixer for fluids 1b Pipe 3b Guide body 30a, 30b Helical blade 39 Outer surface 4 Internal space 40 Space 400 Gap A4-1 Stationary mixer for fluids 3c Guide body 34 Groove 30c, 30d Helical blade 33 Notch A4-2 Stationary mixer for fluids 3d Guide body 4 Internal space 40a Space 400a Gap 41 Space 42 Space 9 Pressure welding torch 90 Gas inlet pipe 90a Base inlet pipe 901 Supply passage 90b Tip inlet pipe 902 Discharge passage 91 Combustible gas supply pipe 92 Oxygen supply pipe

Claims

1. A stationary fluid mixer comprising: a pipe having a linear internal space with fluid supply and discharge sections at both ends in the longitudinal direction; and a guide body housed in the internal space of the pipe, having a flow passage that penetrates in the longitudinal direction, with a predetermined gap between its outer circumference and the inner surface forming the internal space of the pipe, wherein the guide body has a nut mass formed by connecting a required number of nuts in the thickness direction, and the flow passage is formed by the screw holes of each of the nuts.

2. The guide body is a static fluid mixer according to claim 1, wherein a plurality of the nut blocks are arranged in parallel.

3. The guide body is a static fluid mixer according to claim 2, wherein a plurality of the nut clusters are integrally twisted in the circumferential direction.

4. A stationary fluid mixer comprising: a pipe having a linear internal space with fluid supply and discharge sections at both ends in the longitudinal direction; and a guide body housed in the internal space of the pipe, having a flow passage that penetrates in the longitudinal direction, with a predetermined gap provided between its outer circumference and the inner surface forming the internal space of the pipe, wherein the guide body is made by rolling a metal plate into a cylindrical shape and having the flow passage inside.

5. The static fluid mixer according to claim 4, wherein a through hole is provided at a predetermined location on the metal plate, penetrating both sides.

6. The static fluid mixer according to claim 5, wherein a rising portion is provided along the edge of the through hole, protruding from the surface, back surface, or front and back surfaces.

7. A stationary fluid mixer according to claim 1 or claim 4, wherein the inner circumferential surface of the pipe body is provided with spiral projections or spiral grooves extending from the supply section to the discharge section.

8. A static fluid mixer according to claim 1 or claim 4, wherein a groove is provided on the inner circumferential surface of the pipe body, running linearly in the longitudinal direction from the supply section to the discharge section.

9. A stationary fluid mixer comprising a pipe having a linear central flow path with a fluid supply section and a fluid discharge section at both ends in the longitudinal direction, wherein the inner circumferential surface forming the central flow path is provided with spiral projections extending from the supply section to the discharge section, and grooves provided at predetermined locations in the circumferential direction of the inner circumferential surface, intersecting the spiral projections and provided in the longitudinal direction of the pipe.

10. A stationary fluid mixer comprising a pipe having a linear central flow path with a fluid supply section and a fluid discharge section at both ends in the longitudinal direction, wherein the inner circumferential surface forming the central flow path is provided with a spiral groove extending spirally from the supply section to the discharge section, and grooves provided at predetermined locations in the circumferential direction of the inner circumferential surface, intersecting the spiral groove and provided in the longitudinal direction of the pipe.

11. A stationary fluid mixer comprising: a pipe having a linear internal space with a fluid supply section and a fluid discharge section at both ends in the longitudinal direction; and a guide body housed in the internal space of the pipe, having spiral projections on its outer circumference extending from the supply section to the discharge section, with a gap of a predetermined size between the tip of the spiral projections and the inner circumferential surface forming the internal space of the pipe, and grooves provided at predetermined locations in the circumferential direction of the outer circumference, intersecting the spiral projections in the longitudinal direction.

12. The static fluid mixer according to claim 11, wherein the gap between the tip of the spiral projection and the inner surface of the pipe body is formed to be of different sizes near the supply section and near the discharge section.

13. A method for mixing fluids, comprising: the inner surface of a pipe having a linear internal space with fluid supply and discharge sections at both ends in the longitudinal direction; and a guide body disposed inside the pipe, the guide body having a nut mass formed by connecting a required number of nuts in the thickness direction; and a flow passage formed by the screw holes of each of the nuts, wherein the fluid is circulated from the supply section to the discharge section via both a longitudinal flow through the pipe and the flow passage, and an inflow / outflow flow between the gap and the flow passage.

14. A fluid mixing method comprising: the inner circumferential surface of a pipe having a linear internal space with fluid supply and discharge sections at both ends in the longitudinal direction; and a guide body disposed inside the pipe, wherein the guide body is made by rolling a metal plate into a cylindrical shape and has a flow passage inside it, and the fluid is circulated in both routes: a longitudinal flow through the pipe passing through the gap and the flow passage, and an inflow / outflow flow between the gap and the flow passage, with the fluid moving from the supply section to the discharge section.

15. A fluid mixing method in which, in the central flow path of a pipe, the fluid flows from a fluid supply section to a discharge section via both a straight flow in the longitudinal direction of the pipe through the central flow path and a helical flow along the inner circumferential surface forming the central flow path, and the fluid flows in a direction intersecting the helical flow and in the longitudinal direction of the pipe.

16. A fluid mixing method wherein the fluid flows in the space between the outer circumference of a guide body placed inside the pipe and the inner surface of the pipe, from a fluid supply section to a discharge section, via both a linear flow in the longitudinal direction of the pipe passing through the space and a spiral flow passing along the outer circumference, and the fluid flows in a direction intersecting the spiral flow and in the longitudinal direction of the pipe.

17. A fluid mixing method according to claim 15 or claim 16, wherein different types of fluids are simultaneously circulated inside the pipe.

Images