CN114011598A - Spout material mouth structure and nozzle - Google Patents
Spout material mouth structure and nozzle Download PDFInfo
- Publication number
- CN114011598A CN114011598A CN202111443538.6A CN202111443538A CN114011598A CN 114011598 A CN114011598 A CN 114011598A CN 202111443538 A CN202111443538 A CN 202111443538A CN 114011598 A CN114011598 A CN 114011598A
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- China
- Prior art keywords
- inner core
- powder
- outlet
- nozzle
- annular
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Classifications
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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
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
- B05B5/032—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying for spraying particulate materials
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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
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
- B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
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Abstract
The invention provides a material spraying port structure and a nozzle, and relates to the technical field of powder spraying. The structure of the material spraying opening and the nozzle provided by the invention can effectively reduce powder accumulation and powder adhesion at the end face of the inner core of the material spraying opening, ensure that powder is sprayed out of the front part of the end face of the inner core of the nozzle, and improve the uniformity of spraying.
Description
Technical Field
The invention relates to the technical field of powder spraying, in particular to a material spraying port structure and a nozzle.
Background
The existing nozzle for the powder spraying device is composed of an outer sleeve and an inner core arranged in the outer sleeve in a penetrating mode, the outer sleeve and the inner core are of a rotary structure, an annular cavity is formed between the outer sleeve and the inner core, powder with static electricity and compressed air are mixed and then enter from an upper inlet of the nozzle, and the powder is sprayed out from a spraying port at the bottom of the cavity after passing through the cavity.
The existing nozzles for powder spraying devices have the following disadvantages:
1. when powder with static electricity is sprayed out of the spray opening, compressed air enters the atmospheric space after being sprayed out of the spray opening due to the fact that the compressed air is pressurized on the upper portion of the nozzle and in the cavity of the nozzle, the compressed air can expand rapidly, in addition, the compressed air is sprayed out of the spray opening and is diffused rapidly, negative pressure cavities can be generated at the bottom of the inner core, due to the fact that the scattered compressed air and the powder are pulled, air around the inner core is difficult to supplement timely, negative pressure is generated, under the condition that the powder is sprayed out of the nozzle for a long time, the powder in the spraying process can be gradually attracted and pressed onto the bottom plane of the inner core through the negative pressure, and the powder is made to adhere to the bottom face of the umbrella-shaped inner core;
2. because the outer sleeve of the nozzle and the umbrella-shaped inner core are both cavities with gradually expanded diameters, powder can be sprayed out along the gradually expanded cavities when being sprayed out along with compressed air, and the powder is continuously diffused along the spraying direction after leaving the material spraying opening, so that negative pressure cavities at the bottom of the inner core are formed, and the powder sticking condition at the bottom of the umbrella-shaped inner core is aggravated.
Due to the two defects of the nozzle, the time is long, and as the powder attached to the bottom of the inner core is increased, part of accumulated powder falls off due to the gravity or uncertain external force, if the sprayed product is positioned below the nozzle or in the powder spraying direction, large particles formed by the accumulated powder fall on a spraying piece or are blown to the sprayed product by compressed air sprayed from the nozzle, so that the powder attached to the surface of the sprayed product is uneven, and the sprayed product has powder lumps or powder lumps, and unqualified products are produced.
In addition, in the process of spraying powder by a nozzle of the powder spraying device, the outer sleeve and the umbrella-shaped inner core are both gradually-expanded cavities, the powder can be sprayed out along the gradually-expanded cavities in a diffusion mode when sprayed out along with compressed air, the powder can be continuously diffused along the spraying direction to form an umbrella shape after sprayed out, the middle of the umbrella shape is in a hollow state, instantaneous unevenness of the powder on the surface of a sprayed product can be caused, and the difficulty of uniformity of the powder on the spraying surface of the product is increased.
In view of the above, the inventor designs a material spraying port structure and a nozzle through repeated experiments according to production design experiences in the field and related fields for many years, so as to solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide a material spraying port structure and a nozzle, which can effectively reduce powder accumulation and powder adhesion at the end face of an inner core of the material spraying port, ensure that powder is sprayed out of the front part of the end face of the inner core of the nozzle, and improve the spraying uniformity.
In order to achieve the above purpose, the invention provides a material spraying port structure, wherein the material spraying port structure comprises an outer sleeve and an inner core, the inner core is arranged in the outer sleeve in a penetrating manner, an annular interval is formed between the inner core and the outer sleeve, an annular outlet is formed at one end of the annular interval, one end, located at the annular outlet, of the inner core is an outlet end, at least one flow guide groove is formed in the outer side wall of the inner core, the flow guide groove penetrates through the end face of the outlet end of the inner core to form a flow guide outlet, and the annular outlet and the flow guide outlet form a material spraying port together.
The injection port structure as described above, wherein the depth of the diversion trench is set to gradually increase toward the diversion outlet.
The material spraying opening structure is characterized in that the outer side wall of the outlet end of the inner core is in a horn shape gradually expanding towards the annular outlet, the inner wall of the outer sleeve is also in a horn shape gradually expanding in an aligning manner, and the edge of the outlet end of the inner core and the edge of the outer sleeve positioned at the annular outlet are both in a sharp horn shape.
The material spraying opening structure is characterized in that the flow guide groove is formed in the inner core in a direction parallel to the axis of the inner core.
The material spraying opening structure is characterized in that the flow guide groove is formed in the inner core in a direction inclined to the axis of the inner core.
The structure of the material spraying opening is characterized in that the flow guide groove is formed along a spiral line.
The spout structure as above, wherein, the width of guiding gutter is 1 ~ 3mm, its along the radial degree of depth of inner core of water conservancy diversion export is 2 ~ 7 mm.
The material spraying opening structure is characterized in that the outer side wall of the inner core is provided with a plurality of guide grooves, and the guide grooves are uniformly distributed along the circumferential direction of the inner core.
The invention provides a nozzle for a powder spraying device, wherein the nozzle is provided with the material spraying opening structure.
The nozzle as claimed above, wherein the outer sheath and inner core are both made of a metallic conductive material.
Compared with the prior art, the invention has the following characteristics and advantages:
the material spraying port structure and the nozzle are used for spraying powder, the powder flows through the annular interval and then is sprayed out of the material spraying port, the end face of the outlet end of the inner core is provided with the flow guide outlet, when the powder is sprayed, part of the powder and compressed air pass through the annular interval and are sprayed out of the annular outlet, meanwhile, the other part of the powder is sprayed out of the flow guide outlet through the flow guide groove to fill a cavity formed by negative pressure generated at the end face of the outlet end of the inner core due to powder spraying and air jetting of the annular outlet, and further, the powder which is not adhered and accumulated at the outlet end of the inner core can be blown away to prevent adhesion, so that the outlet end of the inner core cannot generate powder adhesion and powder accumulation falling, powder lumps generated on a sprayed product due to powder accumulation falling are avoided, the surface powder of the sprayed product is ensured to be uniform, and the reject ratio of the sprayed product is effectively reduced.
The material spraying port structure and the nozzle are used for spraying powder, and the end surface of the outlet end of the inner core is provided with the flow guide outlet, so that when the powder is sprayed, part of the powder is sprayed out from the annular outlet, and the other part of the powder is sprayed out from the flow guide outlet through the flow guide groove, so that the powder sprayed out of the nozzle opening is subjected to umbrella-shaped diffusion and is also sprayed out from the right front side or the oblique direction of the nozzle opening, the umbrella-shaped hollow state of the sprayed powder is avoided, the uniform distribution of the powder on the surface of a sprayed product is ensured, and the spraying uniformity is improved.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case.
Fig. 1 is a schematic structural diagram of a material spraying port structure according to the present invention;
FIG. 2 is a schematic view of an embodiment of a fluid directing outlet of the present invention;
FIG. 3 is a schematic view of another embodiment of a diversion outlet of the present invention;
FIG. 4 is a schematic view of a flow guide groove according to an embodiment of the present invention;
fig. 5 is a schematic view of another embodiment of the diversion trench of the present invention.
Description of reference numerals:
100. a material spraying port structure; 10. A jacket;
20. an inner core; 21. A diversion trench;
22. a diversion outlet; 30. An annular space;
31. an annular outlet; l1, width;
l2, depth; 200. And (4) a nozzle.
Detailed Description
The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention.
As shown in fig. 1 to 5, the present invention provides a spout structure 100, the spout structure 100 includes an outer sleeve 10 and an inner core 20, the inner core 20 is inserted into the outer sleeve 10, an annular space 30 is provided between the inner core 20 and the outer sleeve 10, an annular outlet 31 is formed at one end of the annular space 30, an outlet end is formed at one end of the inner core 20 located at the annular outlet 31, at least one diversion groove 21 is formed on an outer side wall of the inner core 20, the diversion groove 21 penetrates through an end surface of the outlet end of the inner core 20 to form a diversion outlet 22, and the annular outlet 31 and the diversion outlet 22 together form a spout.
The present invention also provides a nozzle 200 for a powder spraying apparatus, wherein the nozzle 200 has the nozzle opening structure 100 as described above.
The material spraying port structure 100 and the nozzle 200 provided by the invention are used for spraying powder, the powder is sprayed out from the material spraying port after flowing through the annular interval 30, and as the guide outlet 22 is formed on the end surface of the outlet end of the inner core 20, when the powder is sprayed, part of the powder and compressed air pass through the annular interval 30 and are sprayed out from the annular outlet 31, and the other part of the powder is sprayed out from the guide outlet 22 through the guide groove 21 to fill a cavity formed by negative pressure generated at the end surface of the outlet end of the inner core 20 due to powder spraying and air injection of the annular outlet 31, so that the powder which is not adhered and accumulated at the outlet end of the inner core 20 can be blown away, adhesion is prevented, powder adhesion and powder accumulation at the outlet end of the inner core 20 are prevented, powder lumps generated on a sprayed product due to powder accumulation falling are avoided, the surface powder of the sprayed product is uniform, and the reject ratio of the sprayed product is effectively reduced.
The material spraying port structure 100 and the nozzle 200 provided by the invention are used for spraying powder, and the flow guide outlet 22 is formed in the end face of the outlet end of the inner core 20, so that when the powder is sprayed, part of the powder is sprayed out from the annular outlet 31, and the other part of the powder is sprayed out from the flow guide outlet 22 through the flow guide groove 21, so that the powder sprayed out of the nozzle opening is diffused like an umbrella, and is sprayed out from the right front side of the nozzle opening in a straight direction or an inclined direction, the umbrella-shaped hollow state of the sprayed powder is avoided, the uniform distribution of the powder on the surface of a sprayed product is ensured, and the spraying uniformity is improved.
In an alternative embodiment of the present invention, the outer sidewall of the outlet end of the inner core 20 is flared toward the annular outlet 31, and the inner sidewall of the outer sheath 10 is also flared in alignment. By adopting the structure, the powder sprayed out of the annular outlet 31 can be diffused in an umbrella shape after leaving the annular outlet 31, the atomization effect of the sprayed powder is effectively enhanced, and the spraying uniformity is improved.
In an alternative example of this embodiment, the end face of the outlet end of the inner core 20 protrudes from the outer sheath 10, and the edge of the outlet end is pointed, and the edge of the outer sheath 10 at the end of the annular outlet 31 is also pointed. After the nozzle 200 is connected to the electrostatic generator, a relatively strong electric field can be generated at the sharp angle to increase the chargeability of the powder ejected from the nozzle.
In an alternative embodiment of the invention, channels 21 open in a direction parallel to the axis of core 20.
In another alternative embodiment of the present invention, channels 21 are formed in a direction oblique to the axis of core 20.
In an optional example of the embodiment, the included angle b between the diversion trench 21 and the axis of the inner core 20 is 0-60 degrees.
In a further alternative embodiment of the invention, the channels 21 are provided along a spiral.
In an alternative example of this embodiment, the helix angle (not shown) of the helix is 0 to 60 degrees.
In an alternative embodiment of the present invention, the cross-section of the guiding groove 21 is rectangular, the guiding outlet 22 is also rectangular, and the included angle formed by the inner core 20 at the guiding outlet 22 is a square angle or a sharp angle, which is beneficial to generating a relatively strong electric field. In the structure, along with the increase of the length of the sharp corner, the charge capacity of the powder sprayed out of the spray opening is increased, the charge rate of the sprayed powder is increased, the utilization rate of the powder on the surface of a sprayed product is improved, and the waste of the powder is reduced.
In an alternative embodiment of the present invention, the depth of the guide groove 21 is set to gradually increase toward the guide outlet 22.
In an alternative example of this embodiment, the width L1 of the guiding groove 21 is 1-3 mm, and the depth L2 of the guiding groove 21 at the guiding outlet 22 is 2-7 mm.
In an alternative embodiment of the present invention, as shown in fig. 2, the depth direction of the channels 21 is set to open along the radial direction of the inner core 20, that is, the channels 21 open from the outer side wall of the inner core 20 along the radial direction of the inner core 20 toward the axial center of the inner core 20.
In another alternative embodiment of the present invention, as shown in fig. 3, the depth direction of the channels 21 is set to have an angle a with the radial direction of the inner core 20, that is, the channels 21 are opened in a direction oblique to the radial direction of the inner core 20.
In an optional embodiment of the present invention, the outer sidewall of the inner core 20 is provided with a plurality of channels 21, and the plurality of channels 21 are uniformly distributed along the circumferential direction of the inner core 20.
In an optional example of this embodiment, 2 to 6 diversion trenches 21 are uniformly distributed on the outer side wall of the inner core 20, and correspondingly, 2 to 6 diversion outlets 22 are formed on the end face of the outlet end of the inner core 20.
In an alternative embodiment, the outer shell 10 and the inner core 20 are both made of a metallic conductive material. After the nozzle 200 is connected with the electrostatic generator, a stronger electric field is generated at the tip of the annular outlet 31 of the nozzle 200, meanwhile, because the diversion outlet 22 is rectangular, and each vertex angle is also a square angle or a sharp angle, a stronger electric field can be generated, the charge capacity of the powder sprayed out through the annular outlet 31 and the diversion outlet 22 is further increased, the charge rate of the sprayed powder is also increased, the powder coating rate of the powder with static electricity sprayed on the surface of a product is finally increased, the utilization rate of the powder is greatly improved, and the waste of the powder is reduced.
The present invention is not limited to the above embodiments, and in particular, various features described in different embodiments can be arbitrarily combined with each other to form other embodiments, and the features are understood to be applicable to any embodiment except the explicitly opposite descriptions, and are not limited to the described embodiments.
Claims (10)
1. The utility model provides a spout opening structure, a serial communication port, spout opening structure includes overcoat and inner core, the inner core is worn to locate in the overcoat, the inner core with annular interval has between the overcoat, annular interval's one end is formed with annular outlet, inner core it is located annular outlet's one end is the exit end, at least one guiding gutter has been seted up on the lateral wall of inner core, the guiding gutter runs through extremely the terminal surface of its exit end of inner core forms the water conservancy diversion export, annular export with the water conservancy diversion export forms the spout opening jointly.
2. A spout structure of claim 1 wherein the guide groove is formed to have a depth gradually increasing toward the guide outlet.
3. A spout structure according to claim 1 or 2, wherein the outer side wall of the outlet end of the inner core is in a horn shape gradually expanding towards the annular outlet, and the inner wall of the outer sleeve is correspondingly arranged in a gradually expanding horn shape; the edge of the outlet end of the inner core and the edge of the outer sleeve positioned at the annular outlet are in a sharp angle shape.
4. A spout structure according to claim 1 wherein the channels are open in a direction parallel to the axis of the core.
5. A spout structure according to claim 1 wherein the flow-guiding groove is formed in a direction inclined to the axis of the core.
6. A spout structure according to claim 1 wherein the guiding grooves are formed along a spiral line.
7. A spout structure according to any one of claims 4 to 6, wherein the width of the guiding groove is 1 to 3mm, and the depth of the guiding outlet along the radial direction of the inner core is 2 to 7 mm.
8. A spout structure according to claim 1, wherein the outer sidewall of the inner core is provided with a plurality of flow-guiding grooves, and the flow-guiding grooves are uniformly distributed along the circumferential direction of the inner core.
9. A nozzle for a powder spray coating device, wherein the nozzle has a spout structure according to any one of claims 1 to 8.
10. The nozzle of claim 9 wherein the outer jacket and the inner core are both formed of a metallic conductive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111443538.6A CN114011598A (en) | 2021-11-30 | 2021-11-30 | Spout material mouth structure and nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111443538.6A CN114011598A (en) | 2021-11-30 | 2021-11-30 | Spout material mouth structure and nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114011598A true CN114011598A (en) | 2022-02-08 |
Family
ID=80067138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111443538.6A Pending CN114011598A (en) | 2021-11-30 | 2021-11-30 | Spout material mouth structure and nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114011598A (en) |
-
2021
- 2021-11-30 CN CN202111443538.6A patent/CN114011598A/en active Pending
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