CN111500966A

CN111500966A - Flame spray gun mixer

Info

Publication number: CN111500966A
Application number: CN202010545348.4A
Authority: CN
Inventors: 曲作鹏; 王海军; 陆强; 曾宪锋
Original assignee: Jiangsu Kehuan New Material Co ltd; North China Electric Power University
Current assignee: Jiangsu Kehuan New Material Co ltd; North China Electric Power University
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2020-08-07

Abstract

The invention discloses a flame spray gun mixer which comprises a mixer body and a nozzle communicated with the mixer body. The blender body includes the casing that inside offered a plurality of hybrid chambers, pass the powder feeding pipe that a plurality of hybrid chambers set up, with the oxygen feed hole and the acetylene hole that a plurality of hybrid chambers are linked together. The nozzle comprises a nozzle body, a plurality of spray holes and a powder spraying pipe, wherein the fifth mixing cavity is formed in the nozzle body, the spray holes are formed in the end part of the nozzle body and are communicated with the fifth mixing cavity and the outside, the powder spraying pipe is arranged on the nozzle body, and the powder spraying pipe penetrates through the fifth mixing cavity. When the nozzle is assembled with the mixing cavity body, the fifth mixing cavity is communicated with the mixing cavity on the mixer body in a sealing mode. The flame spray gun mixer disclosed by the invention can be used for fully mixing oxygen and acetylene (or other gases) flowing into the mixer, so that the tempering phenomenon is avoided, the mixer is durable, the production efficiency of a company is improved, the potential safety hazard is reduced, and the production cost of the enterprise is saved.

Description

Flame spray gun mixer

Technical Field

The invention relates to the field of mixers, in particular to a flame spray gun mixer.

Background

The powder flame spraying is a thermal spraying method which adopts oxy-acetylene (or other fuels) as a flame heat source and adopts spraying materials as powder, the equipment is simple, the types of the sprayed materials are various, and the method is the most commonly applied thermal spraying process. When spraying, oxygen and acetylene are mixed and ignited through a mixing cavity, and the powder is heated and sprayed at an ejection port.

In the prior art, because oxygen and acetylene are not fully mixed in the mixing cavity, the oxygen content on one side of the oxygen inlet hole is high in the spraying process, so that the tempering phenomenon (oxygen and acetylene are combusted in the mixer) often occurs in the spraying process, the mixer is exploded and damaged, and in a serious condition, 3 to 5 oxygen can be damaged in one day. Once the mixer is damaged, the production time is delayed, the production efficiency is reduced, and potential safety hazards exist; meanwhile, the price of the mixer in the prior art reaches about 3000 yuan, the mixer is very expensive, and the damage of the mixer increases the production cost of enterprises.

Disclosure of Invention

The invention aims to provide a flame spray gun mixer which can fully mix oxygen and acetylene (or other fuels) and avoid the occurrence of a backfire phenomenon.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a flame spray gun blender, includes the blender body, with the nozzle that the blender body is linked together which characterized in that: the mixer body comprises a shell, a powder feeding pipe, an oxygen feeding hole and an acetylene hole, wherein a plurality of mixing cavities are formed in the shell, the powder feeding pipe penetrates through the mixing cavities, the oxygen feeding hole is communicated with the mixing cavities, the acetylene hole is communicated with the mixing cavities, the mixing cavities comprise a first mixing cavity communicated with the oxygen feeding hole and the acetylene hole, a second mixing cavity communicated with the first mixing cavity through a first channel, a third mixing cavity communicated with the second mixing cavity through a second channel, and a fourth mixing cavity communicated with the third mixing cavity through a third channel; the nozzle comprises a nozzle body, a plurality of spray holes and a powder spraying pipe, wherein a fifth mixing cavity is formed in the nozzle body, the spray holes are formed in the end part of the nozzle body and are communicated with the fifth mixing cavity and the outside, the powder spraying pipe is arranged on the nozzle body, and the powder spraying pipe penetrates through the fifth mixing cavity 22; when the nozzle is assembled with the mixing cavity body, the fifth mixing cavity is communicated with the fourth mixing cavity in a sealing mode, and the powder spraying pipe is communicated with the powder feeding pipe in a sealing mode.

Preferably, the first channel is provided with one, and the central line of the first channel is on the same straight line with the central line of the oxygen hole.

Preferably, the outer wall of the powder feeding pipe is provided with an annular bulge, and an annular gap formed between the annular bulge and the inner wall of the mixing cavity is the second channel.

Further, the clearance of the second channel is 1.5-2.5 times of the inner diameter of the first channel.

Preferably, the mixer body comprises a plurality of third passages, and the third passages are circumferentially distributed along the powder feeding pipe.

Preferably, one of the end parts of the powder feeding pipe connected with the powder spraying pipe is provided with a circular truncated cone-shaped or prismoid-shaped groove, and the periphery of the other end part is provided with a circular truncated cone-shaped or prismoid-shaped groove matched with the circular truncated cone-shaped or prismoid-shaped groove.

Preferably, the nozzle body is arranged in the fourth mixing cavity, and a sealing ring is arranged on the periphery of the nozzle body.

Preferably, the spray holes are distributed along the circumferential direction of the powder spraying pipe.

Preferably, the length of the plurality of spray holes is 8mm-10 mm.

Preferably, the blender still including be used for with the nozzle is fixed lid on the blender body, fixed lid open be equipped with nozzle body matched with fixed orifices, the nozzle body periphery is provided with the step face, be provided with in the fixed orifices with step face matched with block portion.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the flame spray gun mixer disclosed by the invention can be used for fully mixing oxygen and acetylene (or other gases) flowing into the mixer, so that the tempering phenomenon is avoided, the mixer is durable, the production efficiency of a company is improved, the potential safety hazard is reduced, and the production cost of an enterprise is saved.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a front view of the mixer body of the present invention;

FIG. 4 is a right side view of the mixer body of the present invention;

FIG. 5 is a left side view of the mixer body of the present invention;

FIG. 6 is a schematic cross-sectional view taken along A-A of FIG. 5;

FIG. 7 is a front view of the nozzle;

FIG. 8 is a left side view of the nozzle;

FIG. 9 is a right side view of the nozzle;

fig. 10 is a schematic cross-sectional view taken along the direction B-B in fig. 9.

Wherein: 1. a mixer body; 11. a housing; 12. a mixing chamber; 121. a first mixing chamber; 122. a second mixing chamber; 123. a third mixing chamber; 124. a fourth mixing chamber; 125. a first channel; 126. a second channel; 127. a third channel; 13. a powder feeding pipe; 131. a powder feeding hole; 132. an annular projection; 14. an oxygen feed hole; 15. an acetylene hole; 16. a clamping portion; 17. positioning holes; 2. a nozzle; 21. a nozzle body; 211. a step surface; 22. a fifth mixing chamber; 23. spraying a hole; 24. a powder spraying pipe; 241. powder spraying holes; 25. a seal ring; 3. a fixed cover; 31. a fixing hole; 4. a truncated cone or truncated pyramid shaped groove.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the specific embodiments.

Referring to fig. 1 to 10, a flame spray gun mixer includes a mixer body 1, a nozzle 2 communicating with the mixer body 1, and a fixing cap 3 for fixing the nozzle 2 to the mixer body 1.

The mixer body 1 includes a housing 11 having a plurality of mixing chambers 12 formed therein, a powder feed pipe 13 disposed to penetrate the plurality of mixing chambers 12, an oxygen feed hole 14 and an acetylene hole 15 communicated with the plurality of mixing chambers 13, and a powder feed hole 131 is formed in the powder feed pipe 13.

The nozzle 2 comprises a nozzle body 21 with a fifth mixing cavity 22 formed therein, a plurality of spray holes 23 formed in the end of the nozzle body 21 and communicated with the fifth mixing cavity 22 and the outside, and a powder spraying pipe 24 arranged on the nozzle body 21, wherein a powder spraying hole 241 is formed in the powder spraying pipe 24, and the powder spraying pipe 24 penetrates through the fifth mixing cavity 22.

When the nozzle 2 is assembled with the mixing cavity body 1, the fifth mixing cavity 22 is hermetically communicated with the fourth mixing cavity 124, the powder spraying pipe 24 is hermetically communicated with the powder feeding pipe 13, and the powder feeding hole 131 is hermetically communicated with the powder spraying hole 241.

The plurality of mixing chambers 12 include a first mixing chamber 121 communicating with the oxygen feed hole 14 and the acetylene hole 15, a second mixing chamber 122 communicating with the first mixing chamber 121 through a first passage 125, a third mixing chamber 123 communicating with the second mixing chamber 122 through a second passage 126, and a fourth mixing chamber 124 communicating with the third mixing chamber 123 through a third passage 127. Partitions are arranged among the first mixing cavity 121, the second mixing cavity 122, the third mixing cavity 123 and the fourth mixing cavity 124, and a first channel 125, a second channel 126 and a third channel 127 are respectively arranged on the partitions. Due to the presence of the partition plates, the first mixing chamber 121, the second mixing chamber 122 and the third mixing chamber 123 are annular mixing chambers, and preferably, the end of the powder feeding pipe 13 is flush with the bottom of the fourth mixing chamber 124, so that the fourth mixing chamber 124 is a cylindrical mixing chamber.

In this embodiment, the oxygen supply hole and the acetylene hole are only referred to as the holes, and oxygen and acetylene can be circulated inside the holes, and other substances can also be circulated inside the holes. In the embodiment, oxygen and acetylene are taken as examples, oxygen enters the first mixing cavity 121 through the oxygen feeding hole 14, and acetylene enters the first mixing cavity 121 through the acetylene hole 15 for first mixing; the gas after the first mixing enters the second mixing chamber 122 through the first passage 125 to be mixed for the second time, so that the oxygen and the acetylene are further mixed; the gas after the second mixing enters the third mixing cavity 123 through the second channel 126 to be mixed for the third time, so that the oxygen and the acetylene are mixed again; the third mixed gas enters the fourth mixing chamber 124 through the third channel 127 to be mixed for the fourth time, so that the oxygen and the acetylene are mixed more fully.

The first passage 121 is provided with one, and the center line of the first passage 125 is aligned with the center line of the oxygen hole 14.

Due to the existence of the partition plates, the second channel 126 and the third channel 127, the oxygen supply holes 14 are not directly opposite to the spray holes 23, so that oxygen and acetylene are uniformly mixed in the mixer and sprayed out, the condition that the concentration of a certain part of oxygen is particularly high does not exist, and the tempering phenomenon is avoided.

Specifically, the outer wall of the powder feeding pipe 13 is provided with an annular protrusion 132, and an annular gap formed between the annular protrusion 132 and the inner wall of the mixing chamber 12 is the second channel 126. The clearance of the second passage 126 is 1.5-2.5 times the inner diameter of the first passage 125.

The mixer body 1 includes a plurality of third passages 127, and the plurality of third passages 127 are uniformly distributed along the circumferential direction of the powder feeding pipe 13.

One of the ends of the powder feeding pipe 13 connected with the powder spraying pipe 24 is provided with a truncated cone-shaped or truncated pyramid-shaped groove 4, and the periphery of the other end is provided with a truncated cone-shaped or truncated pyramid-shaped groove 4 matched with the truncated cone-shaped or truncated pyramid-shaped groove. Preferably, the outer periphery of the end of the powder feeding pipe 13 is arranged to match the truncated cone-shaped groove 4, and the outer periphery of the end of the powder spraying pipe 24 is arranged to match the truncated cone-shaped groove 4, so that the end of the powder spraying pipe 24 can be inserted into the truncated cone-shaped groove 4 of the end of the powder feeding pipe 13 to match with the same to form a hard seal. Under the action of the fixed cover 3, the end part of the powder spraying pipe 24 can be inserted into and attached to the circular truncated cone-shaped groove 4 of the powder feeding pipe 13 to form a hard seal, and the powder feeding hole 131 is communicated with the powder spraying hole 241 in a sealing way.

During the equipment, in fourth hybrid chamber 124 was located to nozzle body 2, fifth hybrid chamber 22 and the sealed intercommunication of fourth hybrid chamber 124, fourth hybrid chamber 124 clearance fit is located to nozzle body 2, and nozzle body 21 periphery is provided with sealing washer 25, avoids the mist to leak.

The plurality of spray holes 23 are uniformly distributed along the circumferential direction of the powder spraying pipe 24. Preferably, the number of the injection holes 23 is 2 to 3 times of the number of the third passages 127, and the inner diameter of the injection holes 23 is 1/3 to 1/2 of the inner diameter of the third passages 127.

Preferably, the third passage 127 is provided with 8 having an inner diameter of 2mm, and the nozzle holes 23 are provided with 16 having an inner diameter of 1 mm. The inner diameter of the nozzle hole 23 is small so that the flow velocity of the mixed gas in the nozzle hole 23 is fast.

The length of the spray hole 23 is 8mm-10 mm. Preferably, the length of the nozzle hole 23 is 9mm, so that the flow of the mixed gas in the nozzle hole 23 is long, and in case of insufficient mixing of the mixed gas, when a backfire occurs, the flow of the flame in the nozzle hole 23 is long, and when the flame does not yet flow into the fifth mixing chamber 22, the flame is pushed out of the nozzle hole 23 by the mixed gas with a high flow rate, so that the backfire of the mixing chamber is avoided, and the explosion in the mixing chamber is avoided.

The fixing cover 3 is provided with a fixing hole 31 matched with the nozzle body 21, a step surface 211 is arranged on the periphery of the nozzle body 21, and a clamping part matched with the step surface 211 is arranged in the fixing hole 31. The periphery of the mixer body 1 is provided with external threads, the inner wall of the fixing hole 31 is provided with internal threads matched with the external threads, and the nozzle body 21 is pressed in the fourth mixing cavity 124 by the fixing cover 3. The outer wall of the mixer body 21 is provided with a clamping portion 17 for facilitating clamping and installation.

A fourth mixing cavity step surface is arranged in the fourth mixing cavity 124, and when the nozzle 2 is arranged in the fourth mixing cavity 124, the bottom of the nozzle body 21 is abutted against the fourth mixing cavity step surface.

The mixer body 1 is further provided with a positioning hole 17 at one end thereof provided with the oxygen supply hole 14 and the acetylene hole 15.

In conclusion, the flame spray gun mixer disclosed by the invention can be used for fully mixing oxygen and acetylene (or other gases) flowing into the mixer, so that the tempering phenomenon is avoided, the mixer is durable, the production efficiency of a company is improved, the potential safety hazard is reduced, and the production cost of the enterprise is saved.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a flame spray gun blender, includes the blender body, with the nozzle that the blender body is linked together which characterized in that:

the mixer body comprises a shell, a powder feeding pipe, an oxygen feeding hole and an acetylene hole, wherein a plurality of mixing cavities are formed in the shell, the powder feeding pipe penetrates through the mixing cavities, the oxygen feeding hole is communicated with the mixing cavities, the acetylene hole is communicated with the mixing cavities, the mixing cavities comprise a first mixing cavity communicated with the oxygen feeding hole and the acetylene hole, a second mixing cavity communicated with the first mixing cavity through a first channel, a third mixing cavity communicated with the second mixing cavity through a second channel, and a fourth mixing cavity communicated with the third mixing cavity through a third channel;

the nozzle comprises a nozzle body, a plurality of spray holes and a powder spraying pipe, wherein a fifth mixing cavity is formed in the nozzle body, the spray holes are formed in the end part of the nozzle body and are communicated with the fifth mixing cavity and the outside, and the powder spraying pipe is arranged on the nozzle body and penetrates through the fifth mixing cavity;

when the nozzle is assembled with the mixing cavity body, the fifth mixing cavity is communicated with the fourth mixing cavity in a sealing mode, and the powder spraying pipe is communicated with the powder feeding pipe in a sealing mode.

2. The flame spray gun mixer of claim 1, wherein: the first channel is provided with one, and the central line of the first channel and the central line of the oxygen hole are on the same straight line.

3. The flame spray gun mixer of claim 1, wherein: the outer wall of the powder feeding pipe is provided with an annular bulge, and an annular gap formed between the annular bulge and the inner wall of the mixing cavity is the second channel.

4. The flame spray gun mixer of claim 3, wherein: the clearance of the second channel is 1.5-2.5 times of the inner diameter of the first channel.

5. The flame spray gun mixing chamber of claim 1, wherein: the mixer body comprises a plurality of third passages which are distributed along the circumferential direction of the powder feeding pipe.

6. The flame spray gun mixer of claim 1, wherein: and one end of the powder feeding pipe is connected with the powder spraying pipe, a truncated cone-shaped or prismoid-shaped groove is formed in one end, and the periphery of the other end of the powder feeding pipe is in a truncated cone shape or prismoid shape matched with the truncated cone-shaped or prismoid-shaped groove.

7. The flame spray gun mixer of claim 1, wherein: the nozzle body is arranged in the fourth mixing cavity, and a sealing ring is arranged on the periphery of the nozzle body.

8. The flame spray gun mixer of claim 1, wherein: the spray holes are distributed along the circumferential direction of the powder spraying pipe.

9. The flame spray gun mixer of claim 1, wherein: the length of the plurality of spray holes is 8mm-10 mm.

10. The flame spray gun mixer of claim 1, wherein: the mixer further comprises a fixing cover used for fixing the nozzle on the mixer body, a fixing hole matched with the nozzle body is formed in the fixing cover, a step surface is arranged on the periphery of the nozzle body, and a clamping portion matched with the step surface is arranged in the fixing hole.