阅读说明：本技术 旋转式燃油型超音速喷枪 (Rotary fuel type supersonic speed spray gun ) 是由 王凯 侯楠楠 申忠 倪利民 于 2020-12-28 设计创作，主要内容包括：本发明公开了一种旋转式燃油型超音速喷枪,它包括枪管、中间连接器、燃烧室、枪身、喷油嘴、稳压器、转换器、同步带轮旋转连接器和多通道混合旋转器,所有外部进来的管道连接到多通道混合旋转器上进行燃油、氧气、送粉及保护气体的供应以及枪内压力的采集和喷枪的冷却；多通道混合旋转器通过同步带轮旋转连接器与喷枪内部的管道连接,再通过转换器连接到喷枪的枪身、喷油嘴及稳压器,稳压器及燃烧室位于喷枪的内部,然后经过中间连接器连接到枪管上,中间连接器两侧连接送粉模块进行送粉。本发明采用多通道混合旋转器实现了喷枪自身的旋转,外置配合机械手,能够实现对工件自身旋转困难,或者一个工件多内孔的喷涂加工。(The invention discloses a rotary fuel type supersonic speed spray gun, which comprises a gun barrel, a middle connector, a combustion chamber, a gun body, an oil nozzle, a voltage stabilizer, a converter, a synchronous pulley rotary connector and a multi-channel mixing rotator, wherein all external incoming pipelines are connected to the multi-channel mixing rotator to supply fuel, oxygen, powder feeding and protective gas, collect the pressure in the gun and cool the spray gun; the multichannel mixes the circulator and passes through synchronous pulley swivelling joint ware and the inside pipe connection of spray gun, and rethread converter is connected to the body of a gun, fuel sprayer and the stabiliser of spray gun, and stabiliser and combustion chamber are located the inside of spray gun, then on being connected to the barrel through intermediate connector, the powder module is sent to intermediate connector both sides connection and powder feeding. The multi-channel mixing rotator is adopted to realize the rotation of the spray gun, and the external matching manipulator can realize the spraying processing of the self-rotation difficulty of the workpiece or the multiple inner holes of one workpiece.)

1. The utility model provides a rotation type fuel type supersonic speed spray gun, includes barrel, intermediate connector, combustion chamber, body of a gun, fuel sprayer, stabiliser, converter, synchronous pulley swivelling joint ware and multichannel mixture circulator, characterized by: the multichannel mixing rotator comprises an outer sleeve and an inner core which are connected in a rotary manner through a bearing, the inner core is connected with the synchronous belt wheel rotary connector through a bolt, the synchronous belt wheel rotary connector is connected with a converter, a cooling water inlet pipeline, a cooling water outlet pipeline, an oxygen conveying pipeline, a fuel oil conveying pipeline, a powder feeding pipeline, an information pipeline and a purifying and protecting gas pipeline are respectively arranged between the inner core and the converter, corresponding channels of the pipelines are respectively arranged on the inner core and the synchronous belt wheel rotary connector and the converter, the converter is connected with one end of a gun body, the other end of the gun body is connected with an intermediate connector, the combustion chamber is arranged in the inner cavity of the gun body, the gun barrel is arranged in the inner cavity of the intermediate connector, the outlet end of the combustion chamber is communicated with the gun barrel, and the inlet end of the combustion chamber is communicated with the voltage stabilizer, and the oil nozzle is arranged in the inner cavity of the pressure stabilizer.

2. A rotary fuel-type supersonic spray gun as defined in claim 1, wherein: the gun body is arranged in the protective shell, the two sides of the middle connector are provided with powder feeding modules, powder feeding channels are arranged in the powder feeding modules, and the powder feeding channels are communicated with the gun barrel.

3. A rotary fuel-type supersonic spray gun as defined in claim 1, wherein: the information pipeline is provided with a pressure gauge, the outlet of the pipe orifice of the gun barrel is provided with an annular air passage, and the annular air passage is communicated with the purification protective gas pipeline to purify the surface of the workpiece.

The technical field is as follows:

the invention relates to a spray gun for thermal spraying, in particular to a rotary fuel type supersonic speed spray gun.

Background art:

supersonic flame spraying is generally used for spraying the outer surface of a workpiece, for a narrow space with the diameter within 500mm, the inner surface of the narrow space is difficult to spray by using a conventional supersonic flame spray gun, because the flame of the conventional spray gun is sprayed axially and the direction and the angle of the flame cannot be changed, only a special elbow inner hole spray gun can be used for spraying the inner wall or the inner hole, the gun barrel of the spray gun has an included angle of 60 degrees or 45 degrees with a combustion chamber, the common inner hole supersonic flame spray guns for spraying the inner wall adopt gas fuel, the pressure of the gas fuel is not high, the pressure of the combustion chamber is low when the spray gun burns, the flame speed is low, when the inner wall of a pipeline or the inner hole of some workpieces is sprayed, the sprayed particle speed is generally 500m/s, the particles collide the surface of the workpiece to form a coating, and the bonding strength (more than 80 Mpa) is required for, the gas bore lance cannot meet the requirement under the condition of low porosity (less than 1%). Moreover, the common inner-hole supersonic flame spray gun only sprays corresponding to a workpiece which can rotate. However, many workpieces to be sprayed with inner hole surfaces are difficult to rotate or cannot rotate, and even one workpiece has multiple inner holes to be sprayed, so that many inner holes cannot be sprayed.

The invention content is as follows:

the technical problem to be solved by the invention is as follows: overcomes the defects of the prior art, and provides a rotary fuel type supersonic speed spray gun which has reasonable design, can rotate by itself, is convenient to use and improves the spraying effect.

The technical scheme of the invention is as follows:

a rotary fuel type supersonic spray gun comprises a gun barrel, an intermediate connector, a combustion chamber, a gun body, an oil nozzle, a voltage stabilizer, a converter, a synchronous pulley rotary connector and a multi-channel mixed rotator, wherein the multi-channel mixed rotator comprises an outer sleeve and an inner core which are rotatably connected through a bearing, the inner core is connected with the synchronous pulley rotary connector through a bolt, the synchronous pulley rotary connector is connected with the converter, a cooling water inlet pipeline, a cooling water outlet pipeline, an oxygen conveying pipeline, a fuel conveying pipeline, a powder feeding pipeline, an information pipeline and a purifying and protecting gas pipeline are respectively arranged between the outer sleeve and the inner core, the synchronous pulley rotary connector and the converter, the inner core, the synchronous pulley rotary connector and the converter are respectively provided with corresponding channels of the pipelines, the converter is connected with one end of the gun body, the other end of the gun body is connected with the intermediate connector, the inner cavity of the gun body is provided with the combustion chamber, the inner cavity of the intermediate connector is provided with the gun barrel, the outlet end of the combustion chamber is communicated with the gun barrel, the inlet end of the combustion chamber is communicated with the pressure stabilizer, and the inner cavity of the pressure stabilizer is provided with the oil nozzle.

The gun body is arranged in the protective shell, the two sides of the middle connector are provided with powder feeding modules, powder feeding channels are arranged in the powder feeding modules, and the powder feeding channels are communicated with the gun barrel.

The information pipeline is provided with a pressure gauge, the outlet of the pipe orifice of the gun barrel is provided with an annular air passage, and the annular air passage is communicated with the purification protective gas pipeline to purify the surface of the workpiece.

The invention has the beneficial effects that:

1. the multi-channel mixing rotator is adopted to realize the rotation of the spray gun, and the external matching manipulator can realize the spraying processing of the workpieces which are difficult to rotate or can not rotate or the inner holes of one workpiece.

2. The spraying direction with different included angles can be formed between the middle connector and the axial direction of the spray gun, and the spray gun with the included angle of 90 degrees can be used for the through hole, so that the spraying effect is optimal. A spray gun structure with a small angle of 60 degrees or 45 degrees can be selected for blind hole spraying to finish the blind hole spraying.

3. The whole gun body is sleeved in the cylindrical protective sheath, the gun mouth is provided with the annular air passage, and the purified protective gas is sprayed out through the annular air passage to purify the surface of the workpiece.

4. The invention has reasonable design, can rotate by itself, is convenient to use, improves the spraying effect, has wide application range and has good economic benefit after popularization.

Description of the drawings:

FIG. 1 is a schematic structural view of a rotary fuel type supersonic spray gun;

FIG. 2 is a sectional view taken along line H-H in FIG. 1;

FIG. 3 is a cross-sectional view taken along line I-I of FIG. 1;

fig. 4 is a sectional view taken along line J-J of fig. 1.

The specific implementation mode is as follows:

example (b): referring to fig. 1-4, there are 1-multi-channel mixing rotator, 2-synchronous pulley rotary connector, 3-cooling water inlet pipe, 4-cooling water outlet pipe, 5-oxygen delivery pipe, 6-fuel delivery pipe, 7-powder delivery pipe, 8-information pipe, 9-purified shielding gas pipe, 10-converter, 11-stabilizer, 12-oil spray nozzle, 13-gun body, 14-combustion chamber, 15-intermediate connector, 16-gun barrel, 17-powder delivery module, 18-protective shell.

Rotary fuel type supersonic spray gun, comprising barrel 16, intermediate connector 15, combustion chamber 14, body 13, injector 12, stabiliser 11, converter 10, synchronous pulley rotary connector 2 and multichannel mixing spinner 1, wherein: the multi-channel mixing rotator 1 comprises an outer sleeve and an inner core which are connected in a rotating manner through a bearing, the inner core is connected with a synchronous belt wheel rotating connector 2 through a bolt, the synchronous belt wheel rotating connector 2 is connected with a converter 10, a cooling water inlet pipeline 3, a cooling water outlet pipeline 4, an oxygen conveying pipeline 5, a fuel oil conveying pipeline 6, a powder feeding pipeline 7, an information pipeline 8 and a purifying and protecting gas pipeline 9 are respectively arranged between the inner core and the synchronous belt wheel rotating connector 2, the converter 10 is connected with one end of a gun body 13, the other end of the gun body 13 is connected with an intermediate connector 15, a combustion chamber 14 is arranged in an inner cavity of the gun body 13, a gun barrel 16 is arranged in an inner cavity of the intermediate connector 15, the outlet end of the combustion chamber 14 is communicated with the gun barrel 16, and the inlet end of the combustion chamber 14 is communicated with a voltage stabilizer 11, an oil nozzle 12 is arranged in the inner cavity of the pressure stabilizer 11.

The preferred scheme is as follows: the gun body 13 is arranged in a protective shell 18, powder feeding modules 17 are arranged on two sides of the middle connector 15, and powder feeding channels are arranged in the powder feeding modules 17 and communicated with the gun barrel 16.

The information pipeline 8 is provided with a pressure gauge, the outlet of the nozzle of the gun barrel 16 is provided with an annular air passage, and the annular air passage is communicated with the purification protective gas pipeline 9 to purify the surface of a workpiece.

The working process is as follows:

1. all external incoming pipes are connected to the multi-channel mixing rotor 1 for fuel, oxygen, powder and shielding gas supply and gun pressure collection.

2. The multi-channel mixing rotator 1 is connected with a pipeline inside the spray gun through a synchronous belt wheel rotary connector 2; and is connected to the gun body 13 and the voltage stabilizer 11 through the converter 10.

3. Kerosene is injected into a combustion chamber 14 from an oil nozzle 12 on a voltage stabilizer 11, oxygen enters the combustion chamber 14 through an oxygen port of the voltage stabilizer 11, and then the kerosene is atomized by the oxygen and then mixed with the oxygen to enter the combustion chamber 14;

4. igniting by an external igniter, and burning the flame into the combustion chamber 14 to form high-temperature and high-pressure flame flow;

5. passing the high-temperature high-pressure flame flow through the inner hole of the pipeline of the intermediate connector 15, compressing the flame flow again, and then entering the diffusion section to form supersonic flame flow;

6. powder enters the flame core from the powder feed pins on both sides of the intermediate connector 15 and is accelerated by the flame stream to exit the outlet end of the barrel.

7. The purifying protective gas is sprayed out through the annular air passage to purify the surface of the workpiece.

8. The spray gun is controlled to rotate by the motor, and the mechanical arm can be additionally arranged to control the movement of the spray gun to realize the spraying of the inner hole. In operation, the outer sleeve of the multi-channel mixing rotator 1 is fixed and the inner core rotates along with the rotating connector 2 of the belt pulley, thereby changing the spraying direction of the gun barrel 16.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent variations and modifications made to the above embodiment according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.