CN109277220B - Dry ice cleaning nozzle with function of stabilizing flow direction of dry ice - Google Patents
Dry ice cleaning nozzle with function of stabilizing flow direction of dry ice Download PDFInfo
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- CN109277220B CN109277220B CN201811284334.0A CN201811284334A CN109277220B CN 109277220 B CN109277220 B CN 109277220B CN 201811284334 A CN201811284334 A CN 201811284334A CN 109277220 B CN109277220 B CN 109277220B
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- dry ice
- compressed air
- nozzle
- air inlet
- pipe
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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
- B05B7/14—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 designed for spraying particulate materials
- B05B7/1481—Spray pistols or apparatus for discharging particulate material
- B05B7/1486—Spray pistols or apparatus for discharging particulate material for spraying particulate material in dry state
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
Abstract
A dry ice cleaning nozzle with a function of stabilizing the flow direction of dry ice comprises a dry ice spray pipe with a first air inlet and a first jet port, a compressed air spray pipe with a second air inlet and a second jet port and a nozzle housing with a third jet port. The dry ice spraying pipe, the compressed air spraying pipe and the nozzle outer cover are sequentially arranged in a sleeved mode from inside to outside through the same central axis, the first jet orifice is located in the second jet orifice, the second jet orifice is located in the third jet orifice, and a first cavity and a second cavity which are used for compressed gas to spray are formed in the gap among the dry ice spraying pipe, the compressed air spraying pipe and the nozzle outer cover. Compressed air jetted from the first cavity at a high speed drives the middle dry ice, so that the kinetic energy of the dry ice is increased, a flow stabilizing effect is achieved, and the compressed air of the second cavity wraps the dry ice at the outermost periphery, so that the dry ice is jetted more stably.
Description
Technical Field
The invention relates to the field of dry ice cleaning, in particular to a dry ice cleaning nozzle with a function of stabilizing the flow direction of dry ice.
Background
The dry ice cleaning is also called cold spraying, compressed air is used as power and carrier, dry ice particles are used as accelerated particles, and the particles are sprayed to the surface of an object to be cleaned through a special spraying cleaning machine, so that the surface of the object to be cleaned, particularly the surface of metal, cannot be damaged, and the smoothness of the surface of the metal cannot be influenced. The design of the dry ice blasting head is important in order to achieve good dry ice blasting effects.
As shown in fig. 1, the prior patent document (patent application publication No. CN 107377531A) discloses a dry ice snow cleaning nozzle device, which includes a nozzle body, a cover connected to the nozzle body, and a base; the nozzle body has CO therein 2 A nozzle composed of CO arranged in the base 2 The connecting pipe is compressed; the side wall of the base is provided with a compressed gas inlet, and CO of the base 2 Inlet and CO 2 CO of the spray head 2 Between the outlets of (A) to form CO 2 A passage in the nozzle body surrounding the CO 2 The nozzle is provided with a plurality of compressed gas through holes in a surrounding manner; CO 2 2 A compressed gas channel is formed between the connecting pipe and the inner walls of the base and the nozzle bodyThe front end of the outer cover is provided with a compressed gas outlet hole, and the front end of the nozzle body extends out of the outer cover and then extends into the compressed gas outlet hole and forms a compressed gas outlet with the inner wall of the compressed gas outlet hole so that the compressed gas is discharged through the compressed gas outlet hole and a gas flow channel between the nozzle body and the inner wall of the outer cover.
In the above prior art, the compressed air in the former case is discharged only through one cavity (i.e. the airflow channel), and the nozzle body and the outer cover opening in the former case are located on the same horizontal plane, the sprayed compressed air has a weak wrapping degree on the sprayed dry ice particles, does not play a strong role in stabilizing the sprayed dry ice, and the flow direction of the dry ice after spraying is not stable enough.
In addition, the nozzle main body is cylindrical, so that the spray angle of the spray outlet of the spray head is small, the coverage range after spraying is narrow, and the cleaning area is small.
In view of the above-mentioned drawbacks of the prior art, there is a real need to design an improved dry ice cleaning nozzle device.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provided is a dry ice cleaning nozzle having a function of stabilizing a flow direction of dry ice.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a dry ice cleaning nozzle with a function of stabilizing the flow direction of dry ice comprises a dry ice spray pipe, a compressed air spray pipe and a nozzle outer cover; wherein: the dry ice spraying pipe is provided with a first air inlet channel and a first spraying opening, and the first air inlet channel is connected with a dry ice air inlet pipe; the compressed air spray pipe is provided with a second air inlet channel and a second jet orifice, the second air inlet channel is connected with a compressed air inlet pipe, and the second air inlet channel is connected with the second jet orifice through a connecting part provided with a plurality of flow guide holes; and a nozzle housing having a third ejection port.
The dry ice spray pipe, the compressed air spray pipe and the nozzle outer cover are sequentially sleeved from inside to outside by using the same central axis, the first jet orifice is positioned in the second jet orifice, and the second rectangular jet orifice is positioned in the third jet orifice; a first gap is formed between the dry ice spray pipe and the compressed air spray pipe for spraying compressed gas, and a second gap is formed between the compressed air spray pipe and the nozzle outer cover for spraying compressed gas.
Preferably, the first, second, and third injection ports have a rectangular cross-sectional shape.
Preferably, the pipe diameter of the first air inlet is gradually increased from the position where the dry ice inlet pipe is connected to the first injection port.
Preferably, the first gap is smaller than the second gap.
Further, the nozzle outer cover comprises an outer cover body and a mounting seat, the outer cover body is sleeved on the periphery of the compressed air spray pipe, a second gap is formed between the outer cover body and the compressed air spray pipe, the end portion of the outer cover body is connected with the mounting seat into a whole, and the other end of the outer cover body is arranged at the third jet orifice.
Further, the inner diameter of the second air inlet channel is larger than that of the connecting portion, the inner diameter of the connecting portion is larger than the minimum inner diameter of a compressed air nozzle, the second injection port is formed in the compressed air nozzle, and the inner diameter of the compressed air nozzle is gradually increased to the second injection port in the injection direction.
The invention has the beneficial effects that:
1) Compressed air ejected through the first gap at a high speed drives the dry ice particles ejected through the first nozzle to increase kinetic energy of the dry ice to enhance cleaning capacity, meanwhile, the compressed air ejected through the first gap at a high speed is high in flow speed relative to the ejected dry ice particles (the speed of the dry ice particles is low because the particles are formed by carbon dioxide liquid throttling expansion, the kinetic energy of the particles is low and the speed is low), a first air layer is formed, the ejected dry ice is coated in the range of the first air layer, the dry ice is prevented from escaping after being ejected, a primary steady flow effect is achieved, a similar second air layer is also ejected from the periphery of the compressed air ejected through the second cavity, the dry ice particles are further coated, and the dry ice is ejected more stably.
2) The shape of the dry ice nozzle is improved to be rectangular, the pipe diameter of the first air inlet channel is gradually increased from the position where the dry ice air inlet pipe is connected to the first jet orifice, and compared with a traditional round hole nozzle (the pipe diameter of the inner part of the nozzle from the air inlet channel to the jet orifice is not changed), the angle of dry ice spraying in the dry ice spraying device is wider, namely, the rectangular dry ice nozzle provides a larger spraying angle, and the spraying range is wider. To match this improvement, the cross-sectional shapes of the second injection ports and the third injection ports are made to coincide with the cross-sectional shape of the first injection ports.
Drawings
Fig. 1 is a perspective view of a conventional dry ice cleaning nozzle device.
Fig. 2 is a perspective view of a dry ice cleaning nozzle device of the present invention.
Figure 3 is an exploded view of the dry ice cleaning nozzle device of the present invention.
Figure 4 is a front view of a dry ice cleaning nozzle device of the present invention.
Fig. 5 is a cross-sectional view of the dry ice cleaning nozzle device as shown in fig. 4.
Fig. 6 is a partially enlarged view of the dry ice cleaning nozzle device shown in fig. 5.
Wherein the numerals shown in the drawings refer to the following:
1, a dry ice spray pipe; 11 first injection ports; 12 a first air inlet channel; 13 a nozzle mount;
2, a compressed air spray pipe; 21 second injection ports; 22 a second inlet duct; 23 a connecting part; 24 diversion holes; 25, a compressed air spray head; 26. an intake air connecting portion;
3, a nozzle housing; 31. third injection ports; 32 a housing body; 33 a mounting seat;
a, a dry ice air inlet pipe joint; b, a compressed air inlet pipe joint;
a W first gap; q second gap.
Detailed Description
For the purpose of making the present invention more fully apparent, its technical solutions and advantages will be described in more detail below with reference to the accompanying fig. 2-6 and examples, it being understood that the specific embodiments described herein are illustrative only and are not limiting.
In one embodiment, the present invention is embodied as follows:
a dry ice cleaning nozzle with a function of stabilizing the flow direction of dry ice as shown in fig. 2 mainly comprises a dry ice spray pipe 1, a compressed air spray pipe 2 and a nozzle housing 3. As shown in fig. 6, a first gap W is formed between the dry ice spray pipe 1 and the compressed air spray pipe 2 for spraying compressed gas, and a second gap Q is formed between the compressed air spray pipe 2 and the nozzle housing 3 for spraying compressed gas.
Referring to fig. 3, dry ice lance 1 has a first injection opening 11 and a first intake duct 12. The tail end of the dry ice spray pipe is fixed in a through hole formed in the spray pipe fixing piece 13, the spray pipe fixing piece 13 radially extends on the end face of one end, connected with the tail end of the dry ice spray pipe, to form a circle of flange, and the other end of the spray pipe fixing piece 13 is sleeved in a dry ice air inlet pipe joint A (the dry ice air inlet pipe joint is in butt joint with a dry ice air inlet pipe) and is limited through the flange. Through the above connection of the parts, the first inlet channel 12 is connected with a dry ice inlet pipe (not shown in the figure), and dry ice gas can be ejected from the first injection port 11 through the first inlet channel 12. The pipe diameter of the first air inlet 12 gradually increases from the position connected with the dry ice inlet pipe joint A to the first injection port 11.
Compressed air spray pipe 2 has compressed air shower nozzle 25, second intake duct 22, connects compressed air shower nozzle 25 end with the gaseous connecting portion 23 of the injection one end of second intake duct 22 and connection the inlet connection portion 26 of the second intake duct other end. As shown in fig. 3, the compressed air nozzle 25 is provided with a second jet orifice 21, the pipe diameter of the compressed air nozzle 25 at the tail end connected with the connecting part 23 gradually increases along the jetting direction to the second jet orifice 21, and the compressed air nozzle 25 is sleeved on the periphery of the dry ice spraying pipe to form the first gap W therebetween; the connecting part 23 is provided with a plurality of diversion holes for shunting compressed air, so that the compressed air is shunted at the diversion holes; the air inlet connecting part 26 is provided with a cavity capable of accommodating the dry ice spray pipe 1 and allowing compressed air to flow, as shown in fig. 5, an opening on the right side of the cavity is sleeved with the dry ice air inlet pipe joint a, and an opening used for connecting the compressed air inlet pipe joint B is further formed in the lower end of the air inlet connecting part 26, so that compressed air can enter the cavity and flow out through the first gap W; the second air inlet passage 22 is connected to the compressed air inlet pipe joint B through the air inlet connecting portion 26, and is communicated with a compressed air inlet pipe (not shown in the figure, the compressed air inlet pipe is connected to the compressed air inlet pipe joint B). In this embodiment, as shown in fig. 5, the inner diameter of the second air inlet duct 22 is larger than the inner diameter of the connecting portion 23, and the inner diameter of the connecting portion 23 is larger than the minimum inner diameter of the compressed air nozzle 25.
The nozzle cover 3 has a third ejection port 31, a cover body 32, and a mount 33. The outer cover body 32 is sleeved on the periphery of the compressed air nozzle 2, and a second gap Q is formed between the outer cover body and the compressed air nozzle so that the compressed air flowing out from the connecting part 23 is sprayed to the outside; the end of the outer cover body 32 is connected with the mounting seat 33 into a whole, and the third jet port 31 is opened at the other end of the outer cover body 32. The mounting seat 33 is sleeved on the compressed air nozzle 2, so that the two are connected together.
In the present embodiment, as shown in fig. 4, the cross-sectional shapes of the first injection ports 11, the second injection ports 21, and the third injection ports 31 are rectangular or rectangular-like shapes.
The dry ice spraying pipe 1, the compressed air spraying pipe 2 and the nozzle housing 3 are sequentially sleeved from inside to outside with the same central axis, as shown in fig. 5, the first spraying opening 11 is located inside the second spraying opening 21, and a set distance is formed between the first spraying opening and the second spraying opening 21; the second injection ports 21 are located within the third injection ports 31 at a predetermined interval from the third injection ports 31.
As shown in fig. 6, the first gap W is smaller than the second gap Q.
In this embodiment, the compressed air ejected at a high speed through the first gap W drives the dry ice particles ejected from the first nozzle 11 to increase the kinetic energy of the dry ice to enhance the cleaning ability, and meanwhile, the compressed air ejected at a high speed through the first gap W has a high flow speed (the speed of the dry ice particles is low because the particles are formed by throttling expansion of carbon dioxide liquid, the kinetic energy of the particles is low and the speed is low), so as to form a first air layer, so that the ejected dry ice is coated in the range of the first air layer, thereby preventing the ejected dry ice from escaping after the dry ice is ejected, and thus, a preliminary flow stabilizing effect is achieved.
The shape of the dry ice nozzle is improved to be rectangular, the pipe diameter of the first air inlet pipe is gradually increased from the position connected with the dry ice air inlet pipe to the first jet orifice, and compared with a traditional round hole nozzle (the pipe diameter of the inner part of the nozzle, from the air inlet pipe to the jet orifice, is not changed), the angle of dry ice spraying in the dry ice spraying device is wider, namely the rectangular dry ice nozzle is adopted to provide a larger spraying angle, and the spraying range is wider. In order to match this improvement, the cross-sectional shapes of the second injection ports and the third injection ports coincide with the cross-sectional shape of the first injection ports.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A dry ice cleaning nozzle with a function of stabilizing the flow direction of dry ice comprises a dry ice spray pipe (1), a compressed air spray pipe (2) and a nozzle outer cover (3); the method is characterized in that:
the dry ice spray pipe (1) is provided with a first air inlet (12) and a first jet orifice (11), and the first air inlet (12) is connected with a dry ice inlet pipe (A);
the compressed air spray pipe (2) is provided with a second air inlet channel (22) and a second spray opening (21), the second air inlet channel (22) is connected with a compressed air inlet pipe (B), and the second air inlet channel (22) is connected with the second spray opening (21) through a connecting part (23) provided with a plurality of flow guide holes (24);
the nozzle housing (3) having a third ejection port (31);
the dry ice spray pipe (1), the compressed air spray pipe (2) and the nozzle outer cover (3) are sequentially sleeved from inside to outside with the same central axis, the first jet orifice (11) is positioned in the second jet orifice (21), and the second jet orifice (21) is positioned in the third jet orifice (31); a first gap (W) is formed between the dry ice spray pipe (1) and the compressed air spray pipe (2) for spraying compressed gas, and a second gap (Q) is formed between the compressed air spray pipe (2) and the nozzle outer cover (3) for spraying compressed gas;
the first gap (W) is smaller than the second gap (Q); the cross-sectional shapes of the first injection ports (11), the second injection ports (21) and the third injection ports (31) are rectangular; the pipe diameter of the first air inlet (12) is gradually increased from the position where the first air inlet is connected with the dry ice inlet pipe to the first jet orifice (11); the first injection port (11), the second injection port (21), and the third injection port (31) are arranged in this order in the direction from the upstream to the downstream of the gas, and the first injection port (11) is located at a position close to the second injection port (21).
2. A dry ice cleaning nozzle with a function of stabilizing the flow direction of dry ice as claimed in claim 1, wherein the nozzle cover (3) comprises a cover body (32) and a mounting seat (33), the cover body (32) is sleeved on the periphery of the compressed air nozzle (2), the second gap (Q) is formed between the cover body and the compressed air nozzle, the end of the cover body (32) is connected with the mounting seat (33) into a whole, and the third jet opening (31) is opened at the other end of the cover body (32).
3. A dry ice cleaning nozzle having a function of stabilizing a flow direction of dry ice as claimed in claim 1, wherein said compressed air nozzle (2) further has a compressed air nozzle (25), and said connecting portion (23) connects a distal end of said compressed air nozzle (25) and an end of said second air inlet duct (22) where air is injected; the inner diameter of the second air inlet channel (22) is larger than that of the connecting portion (23), the inner diameter of the connecting portion (23) is larger than the minimum inner diameter of a compressed air spray head (25), the second spray opening (21) is formed in the compressed air spray head (25), and the inner diameter of the compressed air spray head (25) is gradually increased to the second spray opening (21) in the spray direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811284334.0A CN109277220B (en) | 2018-10-31 | 2018-10-31 | Dry ice cleaning nozzle with function of stabilizing flow direction of dry ice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811284334.0A CN109277220B (en) | 2018-10-31 | 2018-10-31 | Dry ice cleaning nozzle with function of stabilizing flow direction of dry ice |
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| Publication Number | Publication Date |
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| CN109277220A CN109277220A (en) | 2019-01-29 |
| CN109277220B true CN109277220B (en) | 2023-04-11 |
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| CN201811284334.0A Active CN109277220B (en) | 2018-10-31 | 2018-10-31 | Dry ice cleaning nozzle with function of stabilizing flow direction of dry ice |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110142160A (en) * | 2019-05-15 | 2019-08-20 | 厦门理工学院 | A kind of array dry ice spray head and gas-solid mixture production method |
| CN110369403B (en) * | 2019-07-15 | 2024-02-13 | 儒众智能科技（苏州）有限公司 | Dry ice cleaning nozzle, dry ice cleaning machine and secondary pollution prevention dry ice cleaning method |
| CN115041466A (en) * | 2022-07-20 | 2022-09-13 | 立芯科技(昆山)有限公司 | Dry ice cleaning nozzle and dry ice cleaning machine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100740827B1 (en) * | 2004-12-31 | 2007-07-19 | 주식회사 케이씨텍 | Injecting nozzle and cleaning station using the same |
| CN200981035Y (en) * | 2006-11-20 | 2007-11-28 | 艾佩克斯科技(北京)有限公司 | Multistage atomizing swirling liquid nozzle |
| KR101872671B1 (en) * | 2011-03-10 | 2018-07-02 | 에어 워터 가부시키가이샤 | Device for spraying dry ice snow |
| CN103522118B (en) * | 2013-09-26 | 2015-10-07 | 上海金兆节能科技有限公司 | Nested type water, oily gentle three-phase mixing nozzle and comprise the nozzle system of this nozzle |
| CN104084330B (en) * | 2014-07-15 | 2016-01-13 | 重庆大学 | A kind of double-level atomizing nozzle of heat-engine plant desulfurized waste water high-efficiency atomization nucleation |
| CN207325495U (en) * | 2017-08-24 | 2018-05-08 | 中国汽车工业工程有限公司 | A kind of carbon dioxide snowflake cleaning nozzle device |
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