CN211463543U - Nozzle for powder spraying device and powder spraying device - Google Patents

Abstract

The utility model provides a nozzle for a powder spraying device and a powder spraying device, which comprise: a casing, including a first casing body and a second casing body, the first casing body has a first through hole, and the second casing body has a The second through hole; the centering assembly includes a positioning cylinder and a positioning core, a channel is formed between the positioning cylinder and the positioning core, the upper end of the positioning cylinder is coaxially connected to the first sleeve body, and the lower end is coaxially connected to the second sleeve body. It communicates with the first through hole and the second through hole; the inner core is arranged in the second through hole, and its upper end is coaxially connected with the lower end of the positioning core, and a cavity communicated with the channel is formed between the inner core and the second sleeve body , a material injection port is formed between the bottom edge of the second sleeve body and the bottom edge of the inner core. The utility model can realize the coaxial assembly of the outer casing and the inner core by setting the centering component, and ensure that the material injection port is a circular ring with a uniform ring width. The workload and difficulty of processing and assembly are reduced.

Description

A nozzle for powder spraying device and powder spraying device

technical field

The utility model relates to the technical field of spraying, in particular to a nozzle for a powder spraying device and a powder spraying device.

Background technique

The existing nozzle for powder spraying device is composed of an outer casing and an inner core fixed in the outer casing, the outer casing and the inner core are of a rotary type structure, a cavity is formed between the outer casing and the inner core, and the outer casing and the inner core are perpendicular to the space. The two staggered pins are fixedly connected, and the electrostatic powder enters from the upper inlet of the nozzle, passes through the cavity, and is ejected from the annular gap of the nozzle.

Existing nozzles for powder spraying devices have the following disadvantages:

1. In order to ensure that the outer casing and inner core of the nozzle used for the powder spraying device form two concentric circles at the outlet of the nozzle, it is necessary to design and manufacture a tooling structure before assembly, and assemble the tooling structure to ensure that the inner core and the outer casing are concentric ( coaxial) to ensure the same gap between the exit ring seams (ie the ring width), thus increasing the manufacturing cost and assembly difficulty;

2. The outer casing and the inner core of the nozzle for powder spraying device are fixedly connected by two pins that are vertically staggered in space. The two fixed pin holes for installing the pins need to be drilled after assembly and positioning. Therefore, it is necessary to make another tooling for the outer jacket, inner core and its tooling to ensure the positioning of the entire assembly when the two fixed pin holes are drilled, which increases the complexity of processing and assembly;

3. When drilling the two fixed pin holes, it is necessary to pass the drilling tool through the entire casing along the radial direction of the casing, and the fixed pin holes are slender, so it is very difficult to drill the pin holes.

Utility model content

The purpose of the utility model is to provide a nozzle and a powder spraying device for a powder spraying device, so as to solve the problem of difficult coaxial assembly of the outer jacket and the inner core in the prior art.

In order to achieve the above purpose, the present utility model proposes a nozzle for a powder spraying device, which comprises: a casing, including a first casing body and a second casing body which are arranged separately, and the center of the first casing body has an axial direction. The center of the second sleeve body has a second through hole that penetrates axially; the centering assembly includes a positioning cylinder and a positioning cylinder fixed in the positioning cylinder and coaxially arranged with the positioning cylinder A positioning core, there is at least one axially penetrating channel between the positioning cylinder and the positioning core, the upper end of the positioning cylinder is coaxially connected to the first sleeve body, and the lower end of the positioning cylinder is connected to the first sleeve body. The two sleeves are coaxially connected, the channel communicates with the first through hole and the second through hole; the inner core is arranged in the second through hole, and the upper end of the inner core is connected to the positioning core The lower end of the inner core and the second sleeve body are coaxially connected, a cavity communicating with the channel for the powder to pass through is formed between the inner core and the second sleeve body, the bottom edge of the second sleeve body and the bottom edge of the inner core are formed. A material injection port communicated with the cavity is formed therebetween.

The nozzle for a powder spraying device as described above, wherein the lower part of the second sleeve body is a trumpet-shaped first expanding part with an inner diameter gradually expanding along the powder flow direction, and the lower part of the inner core is an outer diameter along the powder flow direction. The flow is directed to the second gradually expanding portion, and the material injection port is formed between the bottom edge of the first expanding portion and the bottom edge of the second expanding portion.

The nozzle for powder spraying device as described above, wherein the center of the lower end of the first sleeve body is provided with a lower step hole, the upper end of the positioning cylinder is inserted into and fixed in the lower step hole, and the second The center of the upper end of the sleeve body is provided with an upper step hole, and the lower end of the positioning cylinder is inserted and fixed in the upper step hole.

The nozzle for a powder spraying device as described above, wherein the upper end of the inner core is provided with an insertion post, the center of the lower end of the positioning core is provided with an installation hole, and the insertion post is inserted into and fixed in the installation hole Inside.

In the above-mentioned nozzle for powder spraying device, wherein the top of the positioning core is a cone with an upward tip, and the cone extends out of the positioning cylinder and into the first through hole.

The nozzle for a powder spraying device as described above, wherein, in a state where the positioning cylinder is connected to the first casing body and the second casing body, the inner wall surface of the positioning cylinder, the first casing The inner wall surface of the sleeve body is aligned with the inner wall surface of the second sleeve body, and when the positioning core is connected to the inner core, the outer wall surface of the positioning core is aligned with the outer wall surface of the inner core.

The nozzle for a powder spraying device as described above, wherein the positioning cylinder and the positioning core are connected by one or more wing plates, and when the number of the wing plates is multiple, a plurality of the The wings are arranged at intervals along the circumferential direction of the positioning cylinder, and a plurality of the wings divide the annular space between the positioning cylinder and the positioning core into a plurality of the channels.

The nozzle for a powder spraying device as described above, wherein the vanes are arranged obliquely with respect to the axis of the positioning cylinder, and when the number of the vanes is plural, the inclination directions of the plural vanes are same.

In the above-mentioned nozzle for powder spraying device, wherein, the included angle between the wing plate and the central axis of the positioning cylinder is 0-60°.

The nozzle for a powder spraying device as described above, wherein the second sleeve body is made of a metal conductive material.

The utility model also provides a powder spraying device, which includes the above-mentioned nozzle.

The features and advantages of the nozzle used for the powder spraying device and the powder spraying device of the present utility model are:

1. The nozzle and powder spraying device of the present utility model for powder spraying device, by setting the centering assembly, when assembling, directly use the centering assembly to connect the first sleeve body, the second sleeve body and the inner core coaxially on the inner core. At the same time, the coaxial assembly of the outer casing and the inner core can be realized, so as to ensure that the bottom edge of the outer casing and the annular bottom edge of the inner core are two concentric circles, ensuring that the material injection port is a circular ring with a uniform ring width, and the assembly operation is simple, Convenient and fast, no need to make a separate tool for assembly, and no need to drill pin holes, which greatly reduces the workload and difficulty of processing and assembly, and reduces costs;

2. The nozzle and the powder spraying device of the present utility model are assembled by arranging a lower step hole and an upper step hole on the first casing body and the second casing body respectively. The inner core is assembled with the mounting hole, which has a simple structure, easy processing, simple and convenient assembly operation, and good centering and positioning;

3. The nozzle and powder spraying device of the present utility model for powder spraying device are provided with lower step holes and upper step holes respectively on the first sleeve body and the second sleeve body to interfere with the positioning cylinder, which can ensure the first and second sleeves. The set body and the second set body will not loosen or fall off after being assembled with the positioning cylinder. By setting mounting holes on the positioning core to interfere with the inner core, it can ensure that the positioning core and the inner core will not loosen or fall off after they are assembled;

4. In the nozzle and powder spraying device of the present invention, by setting the wing plate to be inclined relative to the central axis of the positioning cylinder, the powder coating has a rotating diffusion effect when sprayed from the nozzle, so that the sprayed The powder is more uniform and atomized better.

Description of drawings

The following drawings are only intended to illustrate and explain the present invention schematically, and do not limit the scope of the present invention. in:

1 is an assembly schematic diagram of an embodiment of a nozzle for a powder spraying device of the present invention;

Fig. 2 is the exploded schematic diagram of the nozzle for powder spraying device in Fig. 1;

Figure 3 is a schematic diagram of one embodiment of a centering assembly;

Fig. 4 is a sectional view along line A-A in Fig. 3;

Figure 5 is a schematic diagram of another embodiment of a centering assembly;

FIG. 6 is a top view of the centering assembly of FIG. 5 .

Main component label description:

1. Jacket;

11. The first sleeve body; 111. The first through hole; 112. The lower step hole;

12. The second sleeve body; 121. The second through hole; 122. The upper step hole; 123. The first gradually expanding part;

2. Centering components;

21, positioning cylinder; 22, positioning core; 221, mounting hole; 222, cone; 23, channel; 24, wing plate;

3. Inner core;

31. Insertion column; 32. Second gradually expanding part;

4. Cavity; 41. Material injection port.

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention will now be described with reference to the accompanying drawings. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on The orientation or positional relationship shown in the accompanying drawings is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood To limit the utility model. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

As shown in Figures 1 and 2, the present invention provides a nozzle for a powder spraying device, which comprises an outer casing 1, a centering assembly 2 and an inner core 3, and the outer casing 1 includes a first casing body 11 and The second sleeve body 12 , the first sleeve body 11 , the second sleeve body 12 , the centering assembly 2 and the inner core 3 are all of revolving body structure, and the center of the first sleeve body 11 has a first through hole 111 penetrating in the axial direction, The center of the second sleeve body 12 has a second through hole 121 axially passing through it. The centering assembly 2 is located between the first sleeve body 11 and the second sleeve body 12. The positioning core 22 is arranged coaxially with the positioning cylinder 21 in 21. There is at least one axially through channel 23 between the positioning cylinder 21 and the positioning core 22. The lower end of the cylinder 21 is coaxially connected to the second sleeve body 12 , the channel 23 communicates with the first through hole 111 and the second through hole 121 , and the inner core 3 passes through the second through hole 121 , for example, the inner core 3 is a solid structure , the upper end of the inner core 3 is coaxially connected with the lower end of the positioning core 22, a cavity 4 is formed between the inner core 3 and the second sleeve body 12, the cavity 4 is communicated with the channel 23, and the annular bottom edge of the second sleeve body 12 A material injection port 41 is formed between the inner core 3 and the annular bottom edge of the inner core 3 , and the material injection port 41 communicates with the cavity 4 .

In the present invention, the centering assembly 2 is provided, and the centering assembly 2 is directly used to connect the first sleeve body 11 , the second sleeve body 12 and the inner core 3 coaxially together, so that the outer sleeve 1 and the inner core can be realized. The coaxial assembly and automatic centering of 3 can ensure that the annular bottom edge of the outer casing 1 and the annular bottom edge of the inner core 3 are two concentric circles, ensuring that the injection port is a circle with uniform ring width, and the assembly operation is simple and convenient. , fast, no need to make a separate tool for assembly, and no need to drill pin holes, which greatly reduces the workload and difficulty of processing and assembly, and reduces costs.

When the nozzle for the powder spraying device of the present invention is used for spraying, the powder coating first enters the first through hole 111 of the first sleeve body 11 , passes through the channel 23 of the centering assembly 2 , and then enters the second sleeve body 12 In the cavity 4 between the inner core 3 and the material injection port 41, the sprayed material spray port 41 has a uniform ring width, so that the sprayed powder coating has a good effect of symmetrical and uniform distribution relative to the center of the nozzle axis.

Specifically, the shape of the outer casing 1 is an annular shape, the cavity 4 is an annular cavity, and the material injection port 41 is an annular material injection port.

In an embodiment of the present invention, the second casing 12 is made of metal conductive material. When the second casing 12 is connected to the high-voltage output line of the electrostatic generator, the powder coating is sprayed from the spray port 41 . When passing through the electric field generated by the lower end 12 of the second casing, the powder coating is charged by the electric field and finally adsorbed to the surface of the substrate to be coated. Therefore, the nozzle of this embodiment can also be called an annular discharge nozzle, which can be used in the field of powder electrostatic spraying. In this embodiment, the first sleeve body 11 , the inner core 3 and the centering component 2 can be made of metal conductive materials or non-metallic materials.

In another embodiment of the present invention, the nozzle is made of non-metallic materials, such as inorganic non-metallic materials or organic polymer materials. The nozzle of this embodiment can be used in other spraying fields that do not require ionization.

As shown in FIG. 1 and FIG. 2 , further, the lower part of the second sleeve body 12 is a trumpet-shaped first expanding part 123 whose inner diameter gradually expands along the powder flow direction, and the lower part of the inner core 3 is a trumpet-shaped first expanding part 123 whose outer diameter gradually expands along the powder flow direction. The second expanding portion 32, the shape of the second expanding portion 32 is the same as the shape of the first expanding portion 123, and the shape of the second expanding portion 32 is an umbrella shape, so the inner core 3 can also be called an umbrella cap. A material injection port 41 is formed between the bottom edge of the first expanding portion 123 and the bottom edge of the second expanding portion 32 . By setting the lower part of the inner core 3 into an umbrella-shaped structure that gradually expands along the powder flow direction, the powder coating entering the cavity 4 can be guided to flow, so that the powder coating can be dispersed evenly and in a larger area. below the nozzle.

Specifically, the first through hole 111 is a cylindrical hole, the upper part of the second through hole 121 is a cylindrical hole, and the lower part of the second through hole 121 is a trumpet-shaped opening.

As shown in FIG. 1 and FIG. 2 , further, the bottom edge of the inner core 3 is a sharp corner structure, and the bottom edge of the second sleeve body 12 is higher than the bottom edge of the inner core 3 , this structure makes the spraying effect better.

As shown in FIG. 1 and FIG. 2 , further, the bottom edge of the second sleeve body 12 is a sharp corner structure. When the second sleeve body 12 is made of metal conductive material and is connected to the electrostatic generator, the powder is sprayed from the spray port. When passing through the electric field generated by the tip of the lower end 12 of the second casing, the powder coating is charged by the electric field, and the sprayed powder has better atomization effect, higher charging ability to powder, and better spraying effect.

As shown in FIG. 2 , in one embodiment of the present invention, the center of the lower end of the first sleeve body 11 is provided with a lower step hole 112 , the upper end of the positioning cylinder 21 is inserted into and fixed in the lower step hole 112 , and the second sleeve body The center of the upper end of 12 is provided with an upper step hole 122, and the lower end of the positioning cylinder 21 is inserted into and fixed in the upper step hole 122. In this embodiment, the positioning cylinder 21 is assembled by arranging the lower step hole 112 and the upper step hole 122 , which has a simple structure, is convenient for processing, and is simple and convenient in assembly operation, ensuring that the first sleeve body 11 and the second sleeve body 12 and the positioning cylinder 21 will not be assembled after assembly. Looseness does not fall off, and achieves good centering and positioning.

For example, the lower step hole 112 and the upper step hole 122 are both cylindrical holes, the lower step hole 112 is an interference fit with the upper end of the positioning cylinder 21, and the upper step hole 122 is an interference fit with the lower end of the positioning cylinder 21, which is convenient for processing and assembly. However, the present invention is not limited to this, the lower step hole 112 and the upper step hole 122 can also be fixed to the positioning cylinder 21 in other ways, for example, the lower step hole 112 and the upper step hole 122 are connected with the positioning cylinder 21 by threads.

As shown in FIG. 1 and FIG. 2 , further, the upper end of the inner core 3 is provided with a plug-in column 31 , and the center of the lower end of the positioning core 22 is provided with a mounting hole 221 , that is, the mounting hole 221 is a blind hole, and the shape of the mounting hole 221 corresponds to the shape of the plug-in hole 221 . The shape of the column 31 is matched, the plug column 31 is inserted and fixed in the installation hole 221, the structure is simple, the processing is convenient, and the assembly operation is simple and convenient, ensuring that the positioning core 22 and the inner core 3 will not loosen or fall off after assembling, so as to achieve good positioning. Heart positioning.

For example, the plug-in post 31 is cylindrical, the installation hole 221 is a cylindrical hole, and the plug-in post 31 and the installation hole 221 have an interference fit, which is convenient for processing and assembly. However, the present invention is not limited to this, and the plug-in post 31 can also be fixed to the installation hole 221 in other ways, for example, the plug-in post 31 and the installation hole 221 are connected by screws.

In addition, the middle part of the inner core 3 is cylindrical, and the middle part of the inner core 3 is smoothly connected with the expanding part of the lower part of the inner core 3 .

As shown in FIG. 1 , FIG. 2 and FIG. 3 , further, the top of the positioning core 22 is a cone 222 with its tip pointing upward, and the cone 222 extends out of the positioning cylinder 21 and into the first through hole 111 . 222, the powder paint entering the first through hole 111 can be uniformly dispersed into the channel 23 in the centering assembly 2, and the resistance when the powder paint and the compressed air pass through can be reduced. Specifically, the lower part of the positioning core 22 is a cylinder, and the cone 222 is connected above the cylinder.

Further, the cone angle of the cone 222 is 30°˜90°, and preferably, the cone angle of the cone 222 is 60°.

As shown in FIG. 1 , further, in the state where the positioning cylinder 21 is connected with the first casing body 11 and the second casing body 12 , the inner wall surface of the positioning cylinder 21 , the inner wall surface of the first casing body 11 and the second casing body 12 In the state where the positioning core 22 is connected with the inner core 3, the outer wall surface of the positioning core 22 is aligned with the outer wall surface of the inner core 3, that is, the inner diameter of the positioning cylinder 21 and the inner diameter of the first sleeve body 11 are aligned. The inner diameter of the upper part of the second sleeve body 12 is equal, and the outer diameter of the lower part of the positioning core 22 is equal to the outer diameter of the inner core 3 .

As shown in FIG. 3 , FIG. 4 , FIG. 5 , and FIG. 6 , in one embodiment of the present invention, the positioning cylinder 21 and the positioning core 22 are connected by one or more wing plates 24 , that is, the The outer side is connected to the inner wall of the positioning cylinder 21, and the inner side of the wing plate 24 is connected to the outer wall of the cylinder of the positioning core 22. When the number of the wing plates 24 is multiple, the plurality of wing plates 24 are along the circumferential direction of the positioning cylinder 21. Arranged at equal intervals, a plurality of wings 24 divide the annular space between the positioning cylinder 21 and the positioning core 22 into a plurality of channels 23, for example, the number of wings 24 is two, three, four, five or six correspondingly, the number of channels 23 is two, three, four, five or six.

As shown in FIG. 5 , in an example of this embodiment, the wing plates 24 are inclined relative to the central axis of the positioning cylinder 21 . When the number of the wing plates 24 is multiple, the inclination directions of the plurality of wing plates 24 Similarly, similar to the circular array form of fan blades, the powder coating has a rotating diffusion effect when sprayed from the nozzle, so that the sprayed powder is more uniform and better atomized.

As shown in FIG. 5 , further, the angle α between the wing plate 24 and the central axis of the positioning cylinder 21 is 0 to 60°. Preferably, the angle α between the wing plate 24 and the central axis of the positioning cylinder 21 is 15° or 30°.

As shown in FIG. 4 , but the present invention is not limited to this, in another example of this embodiment, the wing plate 24 is parallel to the central axis of the positioning cylinder 21 .

As shown in FIG. 4 and FIG. 5 , further, the top and bottom ends of the wing plate 24 are both pointed to reduce the resistance when the powder and compressed air pass through.

The processing method for the nozzle of the powder spraying device of the present invention is:

When machining the outer circle of the positioning cylinder 21 and the mounting hole 221 at the lower end of the positioning core 22 on the machine tool, a one-knife machining method is used, that is, the outer circle of the positioning cylinder 21 and the mounting hole 221 are not disassembled and repositioned when machining the machine tool. The concentricity is well ensured. Similarly, the first through hole 111 of the first sleeve body 11 and the lower step hole 112 at the lower end thereof, the second through hole 121 of the second sleeve body 12 and the upper step hole at the upper end thereof. 122, as well as the inserting column 31 at the upper end of the inner core 3, the cylinder in the middle and the second expanding part 32 at the lower part are all revolving bodies, so they are processed in one cut on the machine tool, so they are all well guaranteed. their concentricity.

The utility model also provides a powder spraying device, which comprises the above-mentioned nozzle.

The above descriptions are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present invention shall fall within the protection scope of the present invention. And it should be noted that each component of the present utility model is not limited to the above-mentioned overall application, and each technical feature described in the specification of the present utility model can be used alone or in combination according to actual needs. Therefore, Of course, the present invention covers other combinations and specific applications related to the inventive point of the present invention.

Claims (11)

1. A nozzle for a powder spraying device, wherein the nozzle comprises: The outer sleeve includes a first sleeve body and a second sleeve body arranged separately, the center of the first sleeve body has a first through hole that penetrates axially, and the center of the second sleeve body has a second sleeve body that penetrates axially. through hole; The centering assembly includes a positioning cylinder and a positioning core fixed in the positioning cylinder and coaxially arranged with the positioning cylinder, and there is at least one axially penetrating channel between the positioning cylinder and the positioning core, and the The upper end of the positioning cylinder is coaxially connected to the first sleeve body, the lower end of the positioning cylinder is coaxially connected to the second sleeve body, and the passage communicates with the first through hole and the second through hole ; The inner core is arranged in the second through hole, the upper end of the inner core is coaxially connected with the lower end of the positioning core, and the inner core and the second sleeve body are formed to communicate with the channel. A cavity for powder to pass through, and a material injection port communicated with the cavity is formed between the bottom edge of the second sleeve body and the bottom edge of the inner core. 2 . The nozzle for powder spraying device according to claim 1 , wherein the lower part of the second sleeve body is a trumpet-shaped first expanding part whose inner diameter gradually expands along the powder flow direction, and the inner core The lower part is a second expanding part whose outer diameter gradually expands along the powder flow direction, and the material injection port is formed between the bottom edge of the first expanding part and the bottom edge of the second expanding part. 3 . The nozzle for powder spraying device according to claim 1 , wherein a lower step hole is provided in the center of the lower end of the first sleeve body, and the upper end of the positioning cylinder is inserted into and fixed to the lower step. 4 . In the hole, the center of the upper end of the second sleeve body is provided with an upper step hole, and the lower end of the positioning cylinder is inserted into and fixed in the upper step hole. 4 . The nozzle for powder spraying device according to claim 1 , wherein the upper end of the inner core is provided with an insertion post, the center of the lower end of the positioning core is provided with a mounting hole, and the insertion post is inserted into the nozzle. 5 . and fixed in the mounting hole. 5. The nozzle for a powder spraying device according to claim 1, wherein the top of the positioning core is a cone with an upward tip, and the cone extends out of the positioning barrel and into the in the first through hole. 6. The nozzle for a powder spraying device according to claim 1, characterized in that, in a state in which the positioning cylinder is connected with the first sleeve body and the second sleeve body, the position of the positioning cylinder is The inner wall surface, the inner wall surface of the first sleeve body and the inner wall surface of the second sleeve body are aligned, and in the state where the positioning core is connected to the inner core, the outer wall surface of the positioning core is aligned with the inner wall surface of the positioning core. The outer walls of the cores are aligned. 7. The nozzle for powder spraying device according to any one of claims 1 to 6, wherein the positioning cylinder and the positioning core are connected by one or more wing plates, when the wings When the number of plates is multiple, a plurality of the wing plates are arranged at intervals along the circumferential direction of the positioning cylinder, and the plurality of the wing plates divides the annular space between the positioning cylinder and the positioning core into multiples. said channels. 8 . The nozzle for powder spraying device according to claim 7 , wherein the vanes are arranged obliquely with respect to the axis of the positioning cylinder, and when the number of the vanes is multiple, a plurality of 8 . The inclination directions of the wings are the same. 9 . The nozzle for a powder spraying device according to claim 8 , wherein the included angle between the wing plate and the central axis of the positioning cylinder is 0° to 60°. 10 . 10. The nozzle for a powder spraying device according to any one of claims 1 to 6, wherein the second sleeve body is made of a metal conductive material. 11. A powder spraying device, characterized in that, the powder spraying device comprises the nozzle according to any one of claims 1 to 10.

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