CN111841916B - Combined jet cavitation generation nozzle - Google Patents
Combined jet cavitation generation nozzle Download PDFInfo
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- CN111841916B CN111841916B CN202010540929.9A CN202010540929A CN111841916B CN 111841916 B CN111841916 B CN 111841916B CN 202010540929 A CN202010540929 A CN 202010540929A CN 111841916 B CN111841916 B CN 111841916B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
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Abstract
The invention provides a combined jet cavitation generation nozzle which comprises a shell, a high-pressure flow dividing chamber, a low-pressure chamber, a mixing chamber and a nozzle, wherein the high-pressure flow dividing chamber is arranged in the shell; a low-pressure chamber and a mixing chamber which are communicated with each other are arranged in the shell, and the low-pressure chamber is communicated with low-pressure fluid; the low-pressure chamber is internally provided with a high-pressure shunting chamber which is not communicated with the low-pressure chamber; the high-pressure shunting chamber is communicated with high-pressure fluid, a plurality of spray heads which are arranged in a staggered mode are arranged on the high-pressure shunting chamber, and the spray heads penetrate through the low-pressure chamber to enter the mixing chamber and are used for shearing and mixing low-speed fluid and high-speed fluid. The invention leads high-pressure fluid to enter the high-pressure diversion cavity through the inflow pipeline, adopts a plurality of staggered spray heads to spray high-speed fluid after diversion, and aims to solve the problem of mutual interference of outlet fluid when a plurality of spray heads spray in parallel.
Description
Technical Field
The invention relates to the field of cavitation or the field of cavitation decontamination, in particular to a combined jet cavitation generation nozzle.
Background
Cavitation refers to the process of formation, development and collapse of vapor bubbles within a liquid or at a liquid-solid interface when the local pressure within the liquid drops below a critical pressure. Cavitation can cause the performance of hydraulic mechanical equipment to be reduced, vibration, noise, cavitation damage and the like are caused, surrounding water can be dissociated when cavitation bubbles caused by cavitation collapse, and high-concentration H can be generated by local high temperature and high pressure2O2、O3and-OH in a free state, if the characteristics are utilized, the strengthening of the processes such as chemistry, physics and the like is realized, and the effects of synergy, energy conservation, consumption reduction and the like are achieved. If the method is applied to the field of sewage degradation treatment, better economic benefits can be generated.
Jet cavitation is a mode capable of generating cavitation effect, and is characterized in that a low-pressure area is promoted to appear in a flow field through jet conditions to generate cavitation, cavitation bubbles are mostly generated in a submerging mode, the cavitation effect can be improved by changing conditions such as the size of a flow channel and the shape of a nozzle, the cavitation bubbles can collapse when the surrounding pressure of the cavitation bubbles is improved or an obstacle is met, and the effects of cleaning, strengthening, degrading and the like can be achieved by utilizing energy generated in the process.
The existing jet cavitation spray head can not carry out large-flow fluid cavitation treatment, and if the spray heads are simply arranged, outlet fluids can be interfered with each other, so that the expected effect can not be achieved. Or the structure of the spray head is too complex, and the use cost is increased in the production, installation and maintenance processes. Aiming at the defects, the invention provides the combined multi-channel jet cavitation generating spray head which is distributed in a staggered manner, each spray head is combined with the high-pressure flow dividing structure after being processed independently, and the high-speed fluid and the low-speed fluid are adopted in the cavity to enable the high-speed fluid to be sprayed out and then to be subjected to shearing collision with the low-speed fluid, so that the cavitation effect is further enhanced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a combined jet cavitation generation nozzle, which is characterized in that high-pressure fluid enters a high-pressure distribution cavity through an inflow pipeline, and high-speed fluid injection is carried out by adopting a plurality of nozzles arranged in a staggered manner after distribution, so that the problem of mutual interference of outlet fluid when a plurality of nozzles are sprayed in parallel is solved, the nozzles are arranged in a staggered manner during design, the internal structure of each nozzle is finely adjusted, and the nozzles with a plurality of 1/2 runners and two 3/4 runners are adopted. The low-speed fluid enters the low-pressure chamber by adopting two inlet pipelines, is sprayed into the mixing chamber through the porous plate and is sheared and collided with the high-speed fluid, and the cavitation effect is further enhanced.
The present invention achieves the above-described object by the following technical means.
A combined jet cavitation generation nozzle comprises a shell, a high-pressure flow dividing chamber, a low-pressure chamber, a mixing chamber and a nozzle; a low-pressure chamber and a mixing chamber which are communicated with each other are arranged in the shell, and the low-pressure chamber is communicated with low-pressure fluid; the low-pressure chamber is internally provided with a high-pressure shunting chamber which is not communicated with the low-pressure chamber; the high-pressure shunting chamber is communicated with high-pressure fluid, a plurality of spray heads which are arranged in a staggered mode are arranged on the high-pressure shunting chamber, and the spray heads penetrate through the low-pressure chamber to enter the mixing chamber and are used for shearing and mixing low-speed fluid and high-speed fluid.
Furthermore, a plurality of spray heads which are arranged in a staggered mode on the high-pressure shunting chamber are symmetrically distributed along the center of the mixing chamber.
Further, a porous plate is arranged between the low-pressure chamber and the mixing chamber and is used for enabling low-pressure fluid to form a spraying shape; the spray head penetrates through the porous plate.
Further, the vertical distance between the adjacent spray heads is (0.25-0.35) LAWherein L isAIs the width of the perforated plate; the horizontal distance between adjacent spray heads is (0.55-0.75) LBV (N-1), wherein LBThe length of the perforated plate is shown, and N is the number of the spray heads in each row.
Further, the mixing chamber is tapered.
Further, the cross section of the inner spray cavity of the spray head is 1/2 circles or 3/4 circles or a complete circle.
Furthermore, the cross sections of the inner spray cavities of the spray heads which are arranged on the upper outer side of the high-pressure branch chambers in a staggered mode are 3/4 circles, and the cross sections of the inner spray cavities of the other spray heads are 1/2 circles or/and complete circles.
Furthermore, at least one stage of accelerating cavity and flow stabilizing cavity are arranged in the spray head.
Further, the diameter and the length of the cross section of the flow stabilizing cavity are both larger than those of the cross section of the accelerating cavity; the diameter and the length of the cross section of each stage of accelerating cavity are decreased progressively along the flow direction of the spray head.
Further, the range of the outlet diffusion angle of the nozzle is 0-180 degrees.
The invention has the beneficial effects that:
1. according to the combined jet cavitation generation nozzle, the plurality of nozzles are arranged in a staggered manner so as to improve the treatment flow; each sprinkler structure is adjusted to reduce interference between the high velocity jets at the respective sprinkler outlets.
2. According to the combined jet cavitation generation nozzle, the aperture and the internal section of the nozzle are optimized, the flow stabilizing cavity, the accelerating cavity and the throat nozzle are designed in the nozzle, and a certain diffusion angle is formed outside the throat nozzle, so that fluid is accelerated in the nozzle again, and the speed of the fluid after the fluid leaves an outlet is the maximum.
3. The combined jet cavitation generation nozzle provided by the invention has the advantages that the low-speed flow and the high-speed fluid are arranged for shear mixing, so that the cavitation condition of the fluid in the mixing chamber is maximized.
Drawings
Fig. 1 is a three-dimensional structure diagram of the combined jet cavitation nozzle of the invention.
FIG. 2 is a top view of the combined jet cavitation showerhead of the present invention.
FIG. 3 is a bottom view of the combined jet cavitation showerhead of the present invention.
Fig. 4 is a sectional view taken along the plane a-a of fig. 3.
Fig. 5 is a sectional view taken along the plane B-B of fig. 3.
FIG. 6 is a partial cross-sectional view of the attachment bolt location.
Fig. 7 is a cross-sectional view taken along plane C-C of fig. 4.
Fig. 8 is a cross-sectional view of a single spray head.
In the figure:
1-a low pressure inlet; 2-a high pressure inlet; 3-a reinforcement part; 4-high pressure shunting chamber; 5-a spray head; 6-a perforated plate; 7-a housing; 8-fixing the bolt; 9-connecting a nut; d0-a nozzle outlet diameter; d1-an acceleration chamber diameter; d2-a flow stabilization lumen diameter; l is1-an acceleration chamber length; l is2-a ballast chamber length; theta-exit spread angle.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the combined jet cavitation generating nozzle of the present invention comprises a housing 7, a high pressure branch chamber 4, a low pressure chamber, a mixing chamber and a nozzle 5; as shown in fig. 6, the housing 7 includes a plurality of reinforcement members 3, and the plurality of reinforcement members 3 are assembled by fixing bolts 8 and coupling nuts 9. A low-pressure chamber and a mixing chamber which are communicated with each other are arranged in the shell 7, and the low-pressure chamber is communicated with low-pressure fluid through a low-pressure inlet 1; a high-pressure shunting chamber 4 which is not communicated with the low-pressure chamber is arranged in the low-pressure chamber; the high pressure distribution chamber 4 is in communication with high pressure fluid through a high pressure inlet 2, the high pressure distribution chamberThe high-pressure shunting chamber 4 is provided with a plurality of spray heads 5 which are arranged in a staggered mode, and the spray heads 5 penetrate through the low-pressure chamber to enter the mixing chamber and are used for shearing and mixing low-speed fluid and high-speed fluid. And a plurality of spray heads 5 which are arranged in a staggered mode on the high-pressure shunting chamber 4 are symmetrically distributed along the center of the mixing chamber. A porous plate 6 is arranged between the low-pressure chamber and the mixing chamber and is used for enabling the low-pressure fluid to form a spraying shape after passing through the porous plate 6 after being stabilized in the low-pressure chamber; the spray head 5 passes through the perforated plate 6. As shown in fig. 4, the low-pressure fluid flows into the mixing chamber in a form of being sprayed after passing through the porous plate 6 after entering the low-pressure chamber, so that the flow rate of the low-pressure fluid is large, and in order to ensure uniform pressure and velocity of the low-pressure fluid when flowing out from the porous plate, a symmetrical inlet is adopted in the embodiment. The mixing chamber is tapered to confine the outlet fluid and protect it. The perforated plate 6 is not limited to the figure, the high-speed fluid can be completely wrapped after the low-speed fluid is sprayed, the aperture is not too large, and the maximum aperture of the perforated plate is not larger than 2D (two-dimensional) for ensuring the wrapping effect of the low-speed fluid0And the perforated plate is provided with a gap at the opening of the spray head.
As shown in fig. 5 and 7, the spray head 5 is connected with the high-pressure distribution chamber 4 by using threads, and the cross section of a spray cavity in the spray head 5 is 1/2 circles or 3/4 circles. The cross sections of the inner spray cavities of the spray heads 5 positioned at the two ends of the high-pressure branch chambers 4 which are arranged in a staggered mode are 3/4 circles, and the cross sections of the inner spray cavities of the other spray heads 5 are 1/2 circles. In this embodiment, as shown in fig. 7, 2 rows of spray heads 5 arranged in a staggered manner are disposed on the high-pressure distribution chamber 4, the number of the spray heads 5 is 6, wherein the cross section of the inner spray cavity of 4 spray heads 5 is 1/2 circles, and the cross section of the inner spray cavity of 2 spray heads 5 is 3/4 circles. The spray head farthest from the center adopts spray head 5 with 3/4 section circle, and the spray heads at the other positions adopt spray head 5 with 1/2 section circle. In which the spray portion of the spray head faces away from the center, as exemplified by spray head 5 having a cross-section of 1/2 circles, spray head 5 having a 1/2 circle sprays away from the center of symmetry, and if spray head 5 having a 1/2 circle in fig. 7 is rotated 180 degrees, the direction of spray is toward the center of symmetry.
As shown in FIG. 7, a non-full cross-section flow path nozzle tip 5 causes the fluid to exit the tip without a full circular spray, minusThe interference between adjacent spray heads after the high-speed jet flow is sprayed is reduced, and the vertical distance L between the adjacent spray heads 54Is (0.25 to 0.35) LAWherein L isAIs the width of the perforated plate 6; horizontal distance L between adjacent spray heads 53Is (0.55 to 0.75) LBV (N-1), wherein LBThe length of the perforated plate 6, and N is the number of the spray heads in each row. All the spray heads are arranged centrally. When the spray heads are arranged in 2 rows, the method is arranged according to the embodiment, when the spray head arrangement adopts more than 2 rows, the interference of the spray heads in the middle part is more complicated, a full-circle spray head with a complete flow passage or a transverse 8-shaped structure or other structures can be adopted, but the interval between the adjacent spray heads is increased, the spray head at the outermost end adopts 3/4 circular spray head 5, and the spray head at the outermost end is the spray head farthest from the central position.
As shown in fig. 8, the spray heads may be spliced. And at least one stage of accelerating cavity and a flow stabilizing cavity are arranged in the spray head 5. The diameter and the length of the cross section of the flow stabilizing cavity are both larger than those of the cross section of the accelerating cavity; the diameter and the length of the cross section of each stage of the accelerating cavity are decreased gradually along the flow direction of the spray head 5. In a particular embodiment, the flow-stabilizing cavity length L1Accelerating cavity length L with value of 1-2 times2Diameter of flow stabilizing cavity D2Is larger than the diameter D of the acceleration cavity1Diameter of nozzle outlet D0The value of the outlet diffusion angle theta can be 0-180 degrees as the pressure of the high-pressure fluid increases, but the actual situation value is the best effect of 120 degrees.
The jet cavitation spray head parts constrained by the parameters are combined after being processed, so that the combined jet cavitation spray head has the best cavitation effect, high-speed fluid and low-speed fluid can generate stronger shearing force under the condition of ensuring that the high-speed fluid sprayed by each spray head is reduced in interference, and the cavitation condition in the mixing chamber is maximized.
The working principle of the invention is as follows: the fluid treatment volume is increased by arranging a plurality of nozzles in a staggered arrangement mode, cavitation is enhanced by setting a shearing force generated by mixing high-speed fluid and low-speed fluid, wherein the high-speed fluid enters a high-pressure spray head through a flow dividing structure to be sprayed out, the low-speed fluid is sprayed through a porous plate, and the two fluids are contacted in a mixing chamber to generate a shearing action; the spray heads 5 adopt a staggered arrangement mode and optimize the structure of each spray head to reduce the mutual interference of the fluid at the outlet of the high-speed spray head; by restricting the parameters of each spray head and adopting an accelerating cavity and outlet diffusion angle structure, the fluid can reach a better cavitation state after passing through each spray head; the mixing chamber adopts a conical reducing structure, and the length of the lower end of the mixing chamber is larger than that of the nozzle, so that the outer shell has a certain constraint effect on outlet fluid.
And finally, the combined jet cavitation spray head is applied to the purposes of cavitation degradation, cavitation reinforcement and the like.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (7)
1. A combined jet cavitation generation nozzle is characterized by comprising a shell (7), a high-pressure shunting chamber (4), a low-pressure chamber, a mixing chamber and a nozzle (5); a low-pressure chamber and a mixing chamber which are communicated with each other are arranged in the shell (7), and the low-pressure chamber is communicated with low-pressure fluid; a high-pressure shunting chamber (4) which is not communicated with the low-pressure chamber is arranged in the low-pressure chamber; the high-pressure shunting chamber (4) is communicated with high-pressure fluid, a plurality of spray heads (5) which are distributed in a staggered mode are arranged on the high-pressure shunting chamber (4), and the spray heads (5) penetrate through the low-pressure chamber to enter the mixing chamber and are used for shearing and mixing low-speed fluid and high-speed fluid; a porous plate (6) is arranged between the low-pressure chamber and the mixing chamber and is used for enabling low-pressure fluid to form a spray shape; the spray head (5) penetrates through the porous plate (6); the cross section of an inner spray cavity of the spray head (5) is 1/2 circles or 3/4 circles or a complete circle; the cross sections of the inner spray cavities of the spray heads (5) which are positioned on the outer sides of the high-pressure flow splitting chambers (4) in a staggered mode are 3/4 circles, and the cross sections of the inner spray cavities of the other spray heads (5) are 1/2 circles or full circles.
2. The combined jet cavitation generating nozzle as claimed in claim 1, characterized in that the plurality of nozzles (5) staggered on the high pressure splitter chamber (4) are distributed symmetrically along the center of the mixing chamber.
3. The combined jet cavitation generating nozzle as claimed in claim 1, characterized in that the vertical distance between adjacent nozzles (5) is (0.25-0.35) LAWherein L isAIs the width of the perforated plate (6); the horizontal distance between the adjacent spray heads (5) is (0.55-0.75) LBV (N-1), wherein LBIs the length of the perforated plate (6), and N is the number of the spray heads in each row.
4. The combined jet cavitation generation showerhead of claim 1, wherein the mixing chamber is tapered.
5. The combined jet cavitation generating nozzle according to claim 1, characterized in that at least a primary accelerating cavity and a steady flow cavity are provided in the nozzle (5).
6. The combined jet cavitation generating nozzle of claim 5, characterized in that the cross section of the surge chamber has a diameter and a length both greater than the diameter and the length of the cross section of the acceleration chamber; the diameter and the length of the cross section of each stage of accelerating cavity are decreased gradually along the flow direction of the spray head (5).
7. The combined jet cavitation generating nozzle as claimed in claim 1, characterized in that the outlet spread angle of the nozzle (5) ranges from 0 ° to 180 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010540929.9A CN111841916B (en) | 2020-06-15 | 2020-06-15 | Combined jet cavitation generation nozzle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010540929.9A CN111841916B (en) | 2020-06-15 | 2020-06-15 | Combined jet cavitation generation nozzle |
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| CN111841916A CN111841916A (en) | 2020-10-30 |
| CN111841916B true CN111841916B (en) | 2021-09-10 |
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| CN202010540929.9A Active CN111841916B (en) | 2020-06-15 | 2020-06-15 | Combined jet cavitation generation nozzle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022198537A1 (en) * | 2021-03-25 | 2022-09-29 | Huawei Technologies Co., Ltd. | Jet impingement cooling device and method of manufacturing the same |
| CN114700192A (en) * | 2022-04-24 | 2022-07-05 | 郑州航空工业管理学院 | All-round 360 degrees rotatory water conservation sprinkling irrigation shower nozzles |
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| WO2000066285A1 (en) * | 1999-04-29 | 2000-11-09 | Thru-Tubing Technology, Inc. | Venturi wash apparatus and method |
| US7686022B2 (en) * | 2006-03-08 | 2010-03-30 | Asahi Sunac Corporation | Nozzle device, and cleaning apparatus equipped with the nozzle device |
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| CN203459189U (en) * | 2013-07-15 | 2014-03-05 | 马鞍山市金源超高压设备有限公司 | Cavitation sprayer sutiable for cavitation jet flow |
| CN104668225A (en) * | 2015-01-30 | 2015-06-03 | 中国南玻集团股份有限公司 | Online cleaning device for upper pressing roll of glass pressing machine |
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| CN108296040A (en) * | 2018-03-06 | 2018-07-20 | 中国人民解放军陆军装甲兵学院 | A kind of Hydrodynamic cavitation nozzle of artificial submerged |
| WO2019103323A1 (en) * | 2017-11-23 | 2019-05-31 | 주식회사 포스코 | Cavitation nozzle and steel plate contaminant removal device including same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107813912B (en) * | 2017-06-06 | 2019-02-22 | 信盈船舶生态洁净技术（控股）有限公司 | Underwater cavitating jet cleaning systems |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2113289C1 (en) * | 1997-10-28 | 1998-06-20 | Закрытое акционерное общество "КАВИТЕХ" | Nozzle head for hydrocavitation cleaning of pipe-lines from undesirable deposits |
| WO2000066285A1 (en) * | 1999-04-29 | 2000-11-09 | Thru-Tubing Technology, Inc. | Venturi wash apparatus and method |
| US7686022B2 (en) * | 2006-03-08 | 2010-03-30 | Asahi Sunac Corporation | Nozzle device, and cleaning apparatus equipped with the nozzle device |
| CN203425939U (en) * | 2013-07-03 | 2014-02-12 | 深圳市圳能热源技术有限公司 | Atomization device |
| CN203459189U (en) * | 2013-07-15 | 2014-03-05 | 马鞍山市金源超高压设备有限公司 | Cavitation sprayer sutiable for cavitation jet flow |
| CN104668225A (en) * | 2015-01-30 | 2015-06-03 | 中国南玻集团股份有限公司 | Online cleaning device for upper pressing roll of glass pressing machine |
| CN106111362A (en) * | 2016-06-21 | 2016-11-16 | 安徽理工大学 | A kind of supersonic gas atomizer |
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| CN108296040A (en) * | 2018-03-06 | 2018-07-20 | 中国人民解放军陆军装甲兵学院 | A kind of Hydrodynamic cavitation nozzle of artificial submerged |
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| CN111841916A (en) | 2020-10-30 |
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