A nozzle with a built-in stirring mechanism

Abstract

The utility model discloses a built -in stirring mechanism's shower head, including tubular body, both ends installation column, rotatable stirring paddle, fairlead and nozzle, tubular body entrance end is equipped with outer thread, and stirring paddle contains paddle and subarea dispersion tooth, and is equipped with fairlead in tubular body, and the nozzle is contraction -expansion type and is equipped with spiral recess, annular sawtooth in inside, and the end surface is equipped with honeycomb hole, and this shower head solves the problem of the insufficient mixing of the existing aminoaminotrimethylene phosphonic acid mixing tank supporting device, the problem of the rough segmentation, can promote gas -liquid mixing evenness and particle segmentation fineness, and high pressure adaptability is strong, is applicable to aminoaminotrimethylene phosphonic acid etc. Chemical fluid injection scene.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment, and in particular to a nozzle with a built-in stirring mechanism. Background Technology

[0002] Aminamethylenephosphonic acid (ATMP) is a commonly used organophosphonic acid water treatment agent with excellent chelating, dispersing, and corrosion-inhibiting properties. It is widely used in circulating cooling water systems, boiler water treatment, and the electroplating industry. In the industrial production of ATMP, the mixing process is crucial—the high-pressure gas-liquid mixture formed by the ATMP concentrate (or diluted solution) and compressed air must be uniformly sprayed into the mixing chamber and broken into fine particles to achieve rapid and uniform mixing with other auxiliary materials. This directly affects the purity and performance stability of the final product.

[0003] In existing ATMP mixing equipment, application number: CN202222552048.6 (published as "A Mixing Tank for Aminotrimethylphosphonic Acid"), the fluid injection device is a simple straight-pipe spray water pipe structure. The existing structure has the following drawbacks in practical applications: First, it lacks a built-in stirring mechanism. The high-pressure gas-liquid mixture flows within the tube solely under its own pressure. Due to the density difference between gas and liquid, stratification, characterized by "gas rising and liquid agglomerating," easily occurs. The mixing uniformity of ATMP and air is less than 60%, resulting in purity fluctuations of over ±5% in the subsequent mixed products, failing to meet industrial-grade quality standards. Second, the spray end is a straight-cylinder or single-contraction nozzle. Liquid segmentation relies solely on pressure impact, resulting in particles with diameters concentrated in the 100-150μm range after segmentation. This is far greater than the "≤50μm" fine particle requirement for ATMP mixing, extending mixing time by more than 30% and leading to low production efficiency. Third, the connection between the spray pipe and the mixing chamber relies solely on basic threads without a specific sealing design. Under high pressure conditions of 1.0-1.6MPa, gas-liquid leakage is prone to occur, not only wasting ATMP raw materials but also posing safety hazards to the production environment. To address the shortcomings of the existing technology, there is an urgent need to design a nozzle that combines built-in stirring, fine segmentation, and high-pressure adaptability to optimize the ATMP mixing process. Summary of the Invention

[0004] To overcome the aforementioned deficiencies in existing ATMP mixing nozzles, this invention proposes a nozzle with a built-in stirring mechanism, comprising: a tube body, mounting posts at both ends of the tube body, a rotatable stirring paddle, and a nozzle at one end of the tube body; the other end of the tube body is an inlet end with external threads for connecting to a mixing bin; the stirring paddle includes blades fixed to the mounting posts and dispersing teeth on the blades; the dispersing teeth are radially distributed along the blades and divided into a terminal region and a middle region, with the length of the dispersing teeth in the terminal region being greater than that in the middle region; the dispersing teeth of adjacent blades are circumferentially offset by 60°-90°, and the dispersing teeth are tilted forward by 30°-45° along the rotation direction of the blades, with a gap of 1-1.5mm between the outer side of the dispersing teeth and the inner wall of the tube body; guide ribs are provided inside the tube body between the blades and the nozzle, and honeycomb-shaped holes are provided on the end face of the nozzle.

[0005] Preferably, there are 2-3 blades, and the dispersion teeth on each blade are divided into 3-4 groups along the radial direction, with 2-3 teeth in each group; 3-4 guide ribs are evenly arranged along the circumference of the tube body, with a height of 0.8-1.2mm and a thickness of 0.5-0.8mm. By optimizing the number and size of the blades and guide ribs, stirring blind spots and fluid turbulence can be avoided, and mixing efficiency can be improved.

[0006] Preferably, the terminal region is 70%-100% of the blade length, with a dispersing tooth length of 8-10 mm; the middle region is 30%-70% of the blade length, with a dispersing tooth length of 5-6 mm; the nozzle has a contraction-expansion type structure, with a cone angle of 15°-20° in the contraction section and 8°-12° in the expansion section; the inner wall of the nozzle outlet end is provided with annular serrations, with a serration height of 1.5-2 mm and a tooth pitch of 2-3 mm; the honeycomb pores are distributed in a regular hexagonal array, with a side length of 1-1.5 mm, and the pore depth is consistent with the nozzle end face thickness, which is 2-3 mm. The graded dispersing teeth and the "contraction-expansion + serration + honeycomb" composite nozzle structure can realize multi-stage shearing and segmentation of gas-liquid mixtures, improving particle fineness.

[0007] Preferably, the forward tilt angle of the dispersing teeth is 40°-45° in the terminal region and 30°-35° in the middle region; the tooth tip of the dispersing teeth is an arc shape with a radius of R1-R2mm, and the tooth root has a radius of R0.5mm at the connection with the blade; the tooth tip of the annular sawtooth is an arc shape with a radius of R0.3-R0.5mm; the inner wall of the inner expansion section of the nozzle has a spiral groove in front of the annular sawtooth, the lead of the spiral groove is 5-8mm, and the groove depth is 0.5-0.8mm. The arc design can reduce fluid resistance and component wear, and the spiral groove can make the fluid form a rotating flow, enhancing the centrifugal shearing effect.

[0008] Preferably, the external thread at the inlet end of the pipe body is compatible with nominal diameters of DN25-DN50; the inner wall of the constriction section inside the nozzle is uniformly distributed with micro-protrusions of 0.3-0.5mm in diameter, and the spacing between the protrusions is 1-1.5mm; the wall roughness of the honeycomb pores is Ra≤0.8μm, and the pore walls and the inlet and outlet edges of the nozzle end face are provided with rounded corners of R0.2-R0.3mm, the pore array density is 15-20 pores / cm², and the effective flow area is 80%-90% of the total area of ​​the nozzle end face. This design is compatible with conventional interface sizes, improving the versatility of the device. The micro-protrusions and low-roughness pore walls can further optimize the fluid separation effect.

[0009] Preferably, the blades are non-porous; or, the blades have 3-4 holes with a diameter of 1-1.5 mm, evenly distributed radially; the minimum inner diameter of the nozzle is 1 / 3-1 / 2 of the nominal diameter of the tube inlet; the spiral grooves and annular serrations are staggered; the honeycomb holes correspond one-to-one with the spiral grooves—the blade structure can be selected according to the impurity content of the ATMP stock solution, and the staggered distribution and precise correspondence design can maximize the splitting efficiency.

[0010] The beneficial effects of this utility model are as follows: 1. Improved mixing uniformity: The built-in stirring paddle, through its graded dispersion tooth design, can improve the gas-liquid mixing uniformity of ATMP to over 90%, and the purity fluctuation of the subsequent mixed product is controlled within ±1%; 2. Fine particle segmentation: The composite nozzle structure can control the diameter of liquid particles to 30-50μm, meeting the requirements of the ATMP mixing process and shortening the mixing time by 30%; 3. Strong high-pressure adaptability: The external thread at the inlet end of the pipe is compatible with conventional interfaces, and the dimensions of each component are optimized, ensuring no jamming or leakage under high pressure of 1.0-1.6MPa, making it suitable for industrial production; 4. Wide applicability: The paddle structure can be selected according to the characteristics of the raw materials, making it suitable for mixing various organophosphonic acid substances such as ATMP and hydroxyethylidene diphosphonic acid. Attached Figure Description

[0011] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0012] Figure 1 is a perspective view of this utility model; Figure 2 is a front view of this utility model; In the diagram: 1 - tube body, 2 - mounting column, 3 - blade, 4 - dispersion teeth, 5 - guide ribs, 6 - nozzle. Detailed Implementation

[0013] All the devices selected in this application (parts whose specific structures are not specified) are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0014] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0015] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0017] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0018] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0019] Example 1: The nozzle with a built-in stirring mechanism in this example has the following specific structure and assembly: 1. Component structure and dimensional design (1) Pipe body 1 and mounting column 2: Pipe body 1 is made of stainless steel 304, with an inner diameter of 35mm (suitable for DN32 nominal diameter), and the external thread at the inlet end is G1 pipe thread; the mounting column 2 is a cylindrical structure of the same material, with a diameter of 10mm, located at both ends of pipe body 1, and the coaxiality tolerance with pipe body 1 is ≤0.05mm - this size design can ensure the rotation space of the agitator, while meeting the normal flow rate requirement of 5-10L / min, and the fluid velocity ≥2m / s, which can drive the agitator to rotate. The two ends of the mounting column 2 are connected to pipe body 1 through deep groove ball bearings (model 6202), the outer ring of the bearing is interference fit with pipe body 1 (tolerance H7 / r6), and the inner ring is transition fit with mounting column 2 (tolerance H7 / k6), ensuring that the agitator has no radial runout at a speed of 1200r / min (runout ≤0.03mm), and avoiding friction between the dispersion teeth 4 and the inner wall of pipe body 1.

[0020] (2) Blade 3 and dispersing teeth 4: Blade 3 is made of stainless steel 304 with a thickness of 3mm (balancing strength and lightness), and there are 3 blades (to avoid blind spots in stirring and high noise); Blade 3 is divided into a front end area (0%-30% of length), a middle area (30%-70% of length) and an end area (70%-100% of length) along the radial direction. Dispersing teeth 4 are only provided in the middle and end areas. The front end area is close to the mounting column 2. If dispersing teeth 4 are provided, they are prone to collision due to radial runout. Moreover, the fluid linear velocity in this area is <0.5m / s, so the effect of dispersing teeth 4 is limited. Not providing them can reduce rotational resistance (resistance is reduced by 20%). Each blade 3 has three radially divided dispersion teeth 4, with two teeth in each group. The dispersion teeth 4 are 9 mm long in the end region and 5.5 mm long in the middle region. The forward tilt angle of the dispersion teeth 4 is 42° in the end region and 32° in the middle region. The tooth tip is an arc with a radius of 1.5 mm, and the tooth root is rounded with a radius of 0.5 mm at the connection with the blade 3. The gap between the outer side of the dispersion teeth 4 and the inner wall of the tube 1 is 1.2 mm. The graded length and angle design can enhance the fluid shear force, and the arc and rounded corner design reduces resistance and stress concentration.

[0021] (3) Guide rib 5: The guide rib 5 is made of stainless steel 304. Three ribs are evenly arranged around the circumference of the tube body 1, with a height of 1mm and a thickness of 0.6mm. The distance between the guide rib 5 and the end of the blade 3 is 5mm. This size can guide the stirred fluid into the nozzle 6 in an orderly manner to avoid turbulence, while not hindering the flow of fluid (flow rate loss <5%).

[0022] (4) Nozzle 6: Nozzle 6 is a contraction-expansion type structure with a cone angle of 18° in the contraction section and 10° in the expansion section; the inner wall of the outlet end has an annular serration height of 1.8mm and a tooth pitch of 2.5mm, with the tooth tip being an arc of R0.4mm; the inner wall of the expansion section has a spiral groove with a lead of 6mm and a groove depth of 0.6mm, which is distributed alternately with the annular serration; the end face honeycomb holes are a regular hexagonal array with a side length of 1.2mm and an end face thickness of 2.5mm, and the hole depth is consistent with the end face thickness; the hole wall roughness Ra=0.6μm, the inlet and outlet edges are provided with R0.25mm rounded corners, the array density is 18 holes / cm², and the effective flow area is 85% of the total end face area of ​​nozzle 6. The contraction-expansion structure forms a Venturi effect, the spiral groove makes the fluid form a rotating flow (angular velocity 6rad / s), the annular serration initially shears (particle diameter 80-100μm), and the honeycomb holes finally divide (particle diameter 35-45μm), which meets the ATMP mixing requirements.

[0023] (5) Paddle blade 3 holes: In this embodiment, the paddle blade 3 is provided with 3 holes with a diameter of 1.2 mm, which are evenly distributed in the radial direction. This allows 12% of the flow rate of fluid to pass through the paddle blade 3, forming a composite flow state of "through flow + rotating flow", and the gas-liquid mixing uniformity is increased to 92%.

[0024] 1. Assembly process (1) Bearing press fitting: Press the deep groove ball bearings onto both ends of the mounting column 2 with a pressing force of 8kN to ensure a tight fit; (2) Blade fixing: The blade 3 is fixed to the mounting column 2 by connecting it with a 6×6mm key, and reinforced by spot welding with tolerance H9 / h9 (weld leg height 2mm). (3) Welding of dispersion teeth: Weld the dispersion teeth 4 to the blade 3 by argon arc welding with a welding current of 110A. After welding, grind the outer side to ensure a gap of 1.2mm between the dispersion teeth 4 and the inner wall of the tube body 1. (4) Welding of guide ribs: The guide ribs 5 are welded to the inner wall of the tube body 1 by argon arc welding, and the tooling is positioned (5mm distance from the end of the blade 3). The surface is ground after welding (roughness Ra≤1.6μm). (5) Installation of the agitator assembly: Install the assembly of the mounting column 2 and the blade 3 into the tube body 1, and fix the bearings at both ends with retaining rings (model GB / T894.1); (6) Nozzle connection: Connect nozzle 6 to tube body 1 by thread (thread accuracy 6H / 6g), seal with Loctite 243 anaerobic adhesive, and align the honeycomb holes and spiral grooves with a 2mm positioning pin (fitting clearance 0.01mm); 2. Performance Verification After assembly, an ATMP gas-liquid mixture (ATMP stock concentration 50%, gas-liquid volume ratio 1:3) at 1.2 MPa was introduced. The test results were as follows: the stirring paddle speed was 1200 r / min without jamming; the gas-liquid mixing uniformity was 92%; the liquid particle diameter was 35-45 μm; there was no leakage after holding the pressure for 30 min, and the pressure loss was 4.2%, which meets the requirements for industrial ATMP mixing and production.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A built-in stirring mechanism spray head, comprising a tube body (1), mounting columns (2) arranged at both ends of the tube body (1) and a rotatable stirring paddle, and a nozzle (6) arranged at one end of the tube body (1), characterized in that: The other end of the tube body (1) is the inlet end, which is provided with an external thread; the stirring paddle includes a blade (3) fixed to the mounting column (2) and a dispersion tooth (4) provided on the blade (3); the dispersion tooth (4) is distributed radially along the blade (3) and is divided into an end region and a middle region, with the dispersion tooth in the end region being longer than that in the middle region; the dispersion teeth (4) of adjacent blades (3) are circumferentially offset by 60°-90°, and the dispersion tooth (4) is tilted forward by 30°-45° along the rotation direction of the blade (3), with the outer side of the dispersion tooth (4) and the inner wall of the tube body (1) having a gap of 1-1.5mm; the tube body (1) is provided with a guide rib (5) between the blade (3) and the nozzle (6), and the nozzle (6) end face is provided with a honeycomb-shaped hole.

2. A showerhead with a built-in agitation mechanism as recited in claim 1, wherein: The number of blades (3) is 2-3, and the dispersion teeth (4) on each blade (3) are divided into 3-4 groups along the radial direction, with 2-3 teeth in each group; the guide ribs (5) are evenly arranged in 3-4 circumferential directions along the pipe body (1), and the height of the guide ribs (5) is 0.8-1.2mm and the thickness is 0.5-0.8mm.

3. A showerhead with a built-in agitation mechanism as recited in claim 2, wherein: The end region is 70%-100% of the length of the blade (3), and the dispersion teeth (4) are 8-10mm long; the middle region is 30%-70% of the length of the blade (3), and the dispersion teeth (4) are 5-6mm long; the nozzle (6) is a contraction-expansion type structure, with a cone angle of 15°-20° in the contraction section and a cone angle of 8°-12° in the expansion section; the inner wall of the nozzle (6) outlet end is provided with annular serrations, with a serration height of 1.5-2mm and a tooth pitch of 2-3mm; the honeycomb holes are distributed in a regular hexagonal array, with a side length of 1-1.5mm, and the hole depth is consistent with the end face thickness of the nozzle (6), which is 2-3mm thick.

4. A showerhead with a built-in agitation mechanism as recited in claim 3, wherein: The forward tilt angle of the dispersion tooth (4) is 40°-45° in the end area and 30°-35° in the middle area; the tooth tip of the dispersion tooth (4) is an arc shape of R1-R2mm, and the tooth root and the connection part of the blade (3) are provided with a rounded corner of R0.5mm; the tooth tip of the annular saw tooth is an arc shape of R0.3-R0.5mm; the inner wall of the inner expansion section of the nozzle (6) is provided with a spiral groove in front of the annular saw tooth, the lead of the spiral groove is 5-8mm, and the groove depth is 0.5-0.8mm.

5. A showerhead with a built-in agitation mechanism as recited in claim 4, wherein: The inlet end of the tube (1) is threaded to fit a nominal diameter of DN25-DN50; the inner wall of the constriction section of the nozzle (6) is uniformly distributed with micro protrusions of 0.3-0.5mm in diameter, and the distance between the protrusions is 1-1.5mm; the roughness of the wall of the honeycomb pores is Ra≤0.8μm, and the inlet and outlet edges of the pore wall and the nozzle (6) end face are provided with a radius of R0.2-R0.3mm. The density of the pore array is 15-20 pores / cm², and the effective flow area is 80%-90% of the total area of ​​the nozzle (6) end face.

6. A showerhead with a built-in agitation mechanism as recited in claim 5, wherein: The blade (3) is a non-porous structure; or the blade (3) has 3-4 holes with a diameter of 1-1.5 mm, which are evenly distributed in the radial direction; the minimum inner diameter of the nozzle (6) is 1 / 3-1 / 2 of the nominal diameter of the inlet end of the tube (1); the spiral grooves and the annular saw teeth are interspersed; the honeycomb holes correspond one-to-one with the spiral grooves.

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