CN203899799U - Backflow prevention structure for spraying gun - Google Patents

Abstract

The utility model provides a backflow prevention structure for a spraying gun. The backflow prevention structure comprises a body and a motor device, wherein the body is provided with a cylinder body, a nozzle and a container; a supercharging pipeline and a paint flow pipe are arranged below the cylinder body; a suction pipe is arranged in the container, and is connected with the paint flow pipe; the supercharging pipeline is used for receiving air pressure from the motor device, and increasing air pressure in the container; oil paint in the container reaches the nozzle through the cylinder body by virtue of the suction pipe and the paint flow pipe to be sprayed out. The backflow prevention structure is mainly characterized in that a supercharging ring is arranged on the outer periphery of the upper part of the suction pipe in the container, and is assembled on the bottom surface of the cylinder body, wherein at least one air hole is formed in a position of the supercharging ring; the airflow of the supercharging pipeline reaches the supercharging ring, and penetrates through the air hole to increase the air pressure in the container; the airflow can be circulated in the container through the air hole; the supercharging ring can be used for separating the oil paint in the container to form a separating wall; the air hole has a small aperture, so that the oil paint in the container difficultly flows back to the supercharging pipeline.

Description

Spray gun prevents the structure of adverse current

[technical field]

The utility model relates to the structure that a kind of spray gun prevents adverse current, avoids being detrimental to health.

[background technology]

Traditional spray gun, as shown in Figure 1, spray gun 10 includes a cylinder body 11, one gun barrel 12, one handle 13 and a container 17, it in this cylinder body 11, is an air chamber 111, air chamber 111 is interior can hold a motor 112, one turbine 113, motor 112 drives turbine 113 to rotate, cylinder body 11 tops are provided with a capping 114 and an enclosing cover 115, make air chamber 111 be closed state, this capping 114 and enclosing cover 115 have air inlet, outside air is imported in the air chamber 111 of cylinder body 11, the outer nozzle 121 that is provided with atomization of gun barrel 12, the air chamber 111 of cylinder body 11 extends in gun barrel 12, make gun barrel 12 receive the air-flow that cylinder body 11 transports, it in gun barrel 12, is a cylinder block 14, cylinder block 14 and a container cover 15 are for fixing or one-body molded, container cover 15 connects establishes container 17, gun barrel 12 belows have one by part 16, make can be offset by part 16, press part 16 and make to promote the sleeve pipe 141 in cylinder block 14, in cylinder block 14, still there is an outer spring 142, one inner spring 143 and a pin post 144, this sleeve pipe 141 compresses outer spring 142, make sleeve pipe 141 locate and be able to stressed and displacement, pin post 144 enters in sleeve pipe 141 and a paint stream pipe 145, the sheathed inner spring 143 of end, sleeve pipe 141 ends are provided with a contravention 1411, contravention 1411 can touch two reeds 132 of a microswitch 131, microswitch 131 can starter 112 and turbine 113, these pin post 144 front ends are positioned at nozzle 121, pin post 144 can move forward and backward to be blocked nozzle 121 or opens nozzle 121, in cylinder block 14, there is paint down stream pipe 145 and one pressure piping 146, paint stream pipe 145 is liquid paint vehicles of accepting from the suction pipe 171 of container 17, pressure piping 146 is that the air-flow of motor 112 and turbine 113 is imported in container 17, be positioned at paint stream pipe 145 peripheries and still have an air flue 147, by pressing by part 16, touch microswitch 131, starter 112, the air-flow of motor 112 and turbine 113, air pressure flows to container 17 by pressure piping 146, make the interior increase air pressure of container 17, paint in container 17 is drawn to come up to paint stream pipe 145 via the suction pipe 171 of container cover 15 belows, sleeve pipe 141 is toward post-tensioning pin post 144, inner spring 143 compresses pin post 144, outer spring 142 compresses sleeve pipe 141, pin post 144 or sleeve pipe 141 can be set back, and depending on pressing the distance of stepping back by part 16, to control the size of the amount of spraying paint, the remaining paint of ejection is not back in container 17 by paint stream pipe 145 completely.

This traditional spray gun 10, when suspending use, tends to cause the interior paint warp of container 17 and paint stream pipe 145 interior residual paint, by paint stream, manage 145 adverse currents to cylinder block 14, and flow to outer spring 142, inner spring 143 and pin post 144, or when spray gun 10 spray ceilings or floor, while needing wide-angle tilt spray gun, paint can enter pressure piping 146 in a large number, and then inflow motor, cause motor 112 short circuits, or and leak electricity, damage motor 112, and be detrimental to health.

Some spray guns separately adopt calutron or supercharging motor or external gas pressure pipeline, its cylinder block, paint stream pipe, flow channel, container and container cover and above-mentioned similar, and paint also can produce the situation that adverse current is returned supercharging motor, perplexs very much user.

[utility model content]

A kind of spray gun of the utility model prevents the structure of adverse current, its objective is: 1, provide with suction pipe and have additional a pressurized ring, pressurized ring one position is provided with at least one pore, pressurized ring is made paint in spacing container, form a dividing wall, and the aperture of pore is little, no matter suspend, spray paint or be inverted spray gun, in container, paint is difficult for adverse current to pressure piping and motor apparatus, without having motor short circuit or electric leakage, avoids harmful to human.While 2, providing spray gun spray ceiling or floor, while needing wide-angle tilt spray gun, paint can not enter pressure piping in a large number, and then flows into motor apparatus, causes short circuit.

A kind of spray gun prevents the structure of adverse current, by a body, cylinder block, container cover, container and motor apparatus, formed, in this body, hold motor apparatus and cylinder block, body front end has cylinder block, nozzle, container cover and cylinder block, container cover below connects establishes container, there are a pressure piping and a paint stream pipe in cylinder block below, in container, there is a suction pipe, suction pipe is arranged in paint stream pipe, pressure piping receives the air pressure from motor apparatus, and to increasing air pressure in container, in container, paint sprays through cylinder block to nozzle with suction pipe and paint stream pipe; It is characterized in that: the suction pipe top periphery in this container is provided with a pressurized ring, pressurized ring is assembled in cylinder block bottom surface, after pressurized ring has been assembled, the space that presents sealing, and pressure piping is communicated in pressurized ring, this pressurized ring one precalculated position is provided with at least one pore, and the air-flow of pressure piping is to pressurized ring, and air-flow sees through pore and increase air pressure to container; Pore has can make circulation airflow in container, and pressurized ring is made paint in spacing container, form a dividing wall, and the aperture of pore is little, paints not adverse current to pressure piping in container.

Wherein, this motor apparatus is a motor and a turbine, and motor driving turbine rotates.

Wherein, this cylinder block bottom surface is provided with a bulge loop, this bulge loop make pressure piping and paint stream pipe be positioned at its around scope, bulge loop embeds mutually and combines for pressurized ring.

Wherein, this pressurized ring has a diapire.

Wherein, this body still contains a gun barrel and a handle, it in this body, is an air chamber, in air chamber, can hold motor apparatus, body top is provided with a capping and an enclosing cover, capping and enclosing cover have air inlet, gun barrel is provided with the nozzle of atomization outward, in gun barrel, it is cylinder block, cylinder block and a container cover are formed in one, in cylinder block, there is a sleeve pipe, one outer spring, one inner spring and a pin post, gun barrel below has one by part, make to be offset by part, press part and make to promote the sleeve pipe in cylinder block, sleeve pipe compresses outer spring, pin post enters in sleeve pipe, the sheathed inner spring of end, cannula end is provided with a contravention, contravention can touch two reeds, two reeds are for starting a microswitch, microswitch is made starter device, pin post front end is positioned at nozzle, be positioned at liquid runner periphery and still have an air flue.

The utility model advantage and effect are: with suction pipe, have additional a pressurized ring, pressurized ring one position is provided with at least one pore, pressurized ring is made paint in spacing container, form a dividing wall, and the aperture of pore is little, no matter suspend, spray paint or be inverted spray gun, in container, paint is difficult for adverse current to pressure piping and motor apparatus, without having motor short circuit or electric leakage, avoid harmful to human.When spray gun spray ceiling or floor, while needing wide-angle tilt spray gun, paint can not enter pressure piping in a large number, and then flows into motor apparatus, causes short circuit.

[accompanying drawing explanation]

Fig. 1 is the generalized section of known electric spray gun.

Fig. 2 is perspective exploded view of the present utility model.

Fig. 3 is section combination schematic diagram of the present utility model.

Number in the figure is described as follows:

10 spray gun 11 cylinder body 12,201 gun barrel 13,22 handles

17,40 container 111,21 air chamber 112,51 motor 113,52 turbines

114,53 capping 115,54 enclosing cover 121,32 nozzle 14,30 cylinder block

15,301 container cover 16,24 are pressed part 141,31 sleeve pipe 142,312 outer springs

143,33 inner spring 144,34 pin post 145,35 paint stream pipe 1411,311 contraventions

131,23 microswitch 132,231 reed 146,36 pressure piping 171,41 suction pipes

147,37 air flue 20 body 50 motor apparatus 42 pressurized rings

421 diapire 302 bulge loop 422 pores

[specific embodiment]

A kind of spray gun of the utility model prevents the structure of adverse current, as Figure 2-3, it includes a body 20, one cylinder block 30, one container cover 301, one container 40 and a motor apparatus 50, in this body 20, hold motor apparatus 50 and cylinder block 30, body 20 front ends have cylinder block 30, nozzle 32, container cover 301 fixes with cylinder block 30, container cover 301 belows connect establishes container 40, body 20 still has a gun barrel 201 and a handle 22, in this body 20, there is an air chamber 21, air chamber 21 is interior can hold motor apparatus 50, motor apparatus 50 is a motor 51 and a turbine 52, motor 51 drives turbine 52 to rotate, body 20 tops are provided with a capping 53 and an enclosing cover 54, make air chamber 21 be closed state, this capping 53 and enclosing cover 54 have air inlet, outside air is imported in the air chamber 21 of cylinder body 11, the outer nozzle 32 that is provided with atomization of gun barrel 201, the air chamber 21 of body 20 extends in gun barrel 201, the air-flow that the air chamber 21 that makes the cylinder block 30 in gun barrel 201 receive body 20 transports, it in gun barrel 201, is a cylinder block 30, cylinder block 30 and a container cover 301 are for fixing or one-body molded, container cover 301 connects establishes container 40, in container 40, there is a suction pipe 41, gun barrel 201 belows have one by part 24, make can be offset by part 24, press part 24 and make to promote the sleeve pipe 31 in cylinder block 30, in cylinder block 30, still there is an outer spring 312, one inner spring 33 and a pin post 34, this sleeve pipe 31 compresses outer spring 312, make sleeve pipe 31 locate and be able to stressed and displacement, pin post 34 enters in sleeve pipe 31 and a paint stream pipe 35, the sheathed inner spring 33 of pin post 34 end, be positioned at paint stream pipe 35 peripheries and still have an air flue 37, sleeve pipe 31 ends are provided with a contravention 311, contravention 311 can touch two reeds 231 of a microswitch 23, microswitch 23 can starter 51 and turbine 52, these pin post 34 front ends are positioned at nozzle 32, pin post 34 can move forward and backward to be blocked nozzle 32 or opens nozzle 32, in cylinder block 30, there is an a paint down stream pipe 35 and pressure piping 36 down, the liquid paint vehicle that paint stream pipe 35 is accepted from the suction pipe 41 of container 40, pressure piping 36 imports the air-flow of motor 51 and turbine 52 in container 40,

Principal character of the present utility model and improvement are: the suction pipe 41 top peripheries in this container 40 are provided with a pressurized ring 42, pressurized ring 42 directly sets firmly or is shaped in suction pipe 41 top peripheries, pressurized ring 42 has a diapire 421, pressurized ring 42 is assembled in cylinder block 30 bottom surfaces, these cylinder block 30 bottom surfaces are provided with a downward bulge loop 302, bulge loop 302 can be combined for pressurized ring 42 tablings, after pressurized ring 42 has been assembled, the space that presents sealing, this bulge loop 302 make pressure piping 36 and paint stream pipe 35 be positioned at its around scope, and pressure piping 36 is communicated in pressurized ring 42, paint stream pipe 35 and suction pipe 41 tablings, so that pressurized ring 42 and suction pipe 41 are combined in to cylinder block 30 bottom surfaces, these pressurized ring 42 1 precalculated positions are provided with a pore 422, pore 422 apertures are smaller, non-large aperture, pore 422 can be provided with one or more, pore 422 is arranged at pressurized ring 42 peripheries or diapire 421, the air-flow of pressure piping 36 is to pressurized ring 42, air-flow sees through pore 422 to the interior increase air pressure of container 40.

By above-mentioned constructional device, a kind of spray gun of the utility model prevents the structure of adverse current, during action, press this by part 24, touch microswitch 23, starter device 50, the air-flow of motor 51 and turbine 52, air pressure by pressure piping 36 to pressurized ring 42, air-flow sees through the pore 422 of pressurized ring 42 to container 40, make the interior increase air pressure of container 40, make the interior increase air pressure of container 40, paint in container 40 is drawn to come up to paint stream pipe 35 to cylinder block 30 front ends via the suction pipe 41 of container cover 301 belows, and sleeve pipe 31 is toward post-tensioning pin post 34, inner spring 33 compresses pin post 34, outer spring 312 compresses sleeve pipe 31, paint sprays through nozzle 32, and depending on pressing the distance of stepping back by part 24, to control the size of the amount of spraying paint.

Because having, the pore 422 of this case can make circulation airflow in container 40, do normal supercharging in container 40, not because of the little pressurized air stream that affects in aperture of pore 422, pressurized ring 42 can be made the interior paint of effective spacing container 40 and enter in pressure piping 36, these pore 422 apertures are little again, the interior paint of container 40 be difficult for adverse current to pressure piping 36, cylinder block 30 and motor apparatus 50, this pressurized ring 42 is a dividing wall, the space of pressurized ring 42 also forms a mitigation space.

The pore 422 of the utility model pressurized ring 42 highly can be made in response to the size of container 40 height, can make higher position, make pore 422 not the paint in receptor 40 enter, when no matter this case time-out sprays paint or spray gun sprays ceiling or floor, while needing wide-angle tilt spray gun, paint can not enter pressure piping in a large number, can and then not flow into motor 51, avoid electric leakage and cause short circuit, avoiding harmful to human.

Claims (5)

1. a spray gun prevents the structure of adverse current, by a body, cylinder block, container cover, container and motor apparatus, formed, in this body, hold motor apparatus and cylinder block, body front end has cylinder block, nozzle, container cover and cylinder block, container cover below connects establishes container, there are a pressure piping and a paint stream pipe in cylinder block below, in container, there is a suction pipe, suction pipe is arranged in paint stream pipe, pressure piping receives the air pressure from motor apparatus, and to increasing air pressure in container, in container, paint sprays through cylinder block to nozzle with suction pipe and paint stream pipe; It is characterized in that: the suction pipe top periphery in this container is provided with a pressurized ring, pressurized ring is assembled in cylinder block bottom surface, after pressurized ring has been assembled, the space that presents sealing, and pressure piping is communicated in pressurized ring, this pressurized ring one precalculated position is provided with at least one pore, and the air-flow of pressure piping is to pressurized ring, and air-flow sees through pore and increase air pressure to container; Pore has can make circulation airflow in container, and pressurized ring is made paint in spacing container, form a dividing wall, and the aperture of pore is little, paints not adverse current to pressure piping in container.

2. spray gun according to claim 1 prevents the structure of adverse current, it is characterized in that: this motor apparatus is a motor and a turbine, and motor driving turbine rotates.

3. spray gun according to claim 1 prevents the structure of adverse current, it is characterized in that: this cylinder block bottom surface is provided with a bulge loop, this bulge loop make pressure piping and paint stream pipe be positioned at its around scope, bulge loop embeds mutually and combines for pressurized ring.

4. spray gun according to claim 1 prevents the structure of adverse current, it is characterized in that: this pressurized ring has a diapire.

5. spray gun according to claim 1 prevents the structure of adverse current, it is characterized in that: this body still contains a gun barrel and a handle, it in this body, is an air chamber, in air chamber, can hold motor apparatus, body top is provided with a capping and an enclosing cover, capping and enclosing cover have air inlet, gun barrel is provided with the nozzle of atomization outward, in gun barrel, it is cylinder block, cylinder block and a container cover are formed in one, in cylinder block, there is a sleeve pipe, one outer spring, one inner spring and a pin post, gun barrel below has one by part, make to be offset by part, press part and make to promote the sleeve pipe in cylinder block, sleeve pipe compresses outer spring, pin post enters in sleeve pipe, the sheathed inner spring of end, cannula end is provided with a contravention, contravention can touch two reeds, two reeds are for starting a microswitch, microswitch is made starter device, pin post front end is positioned at nozzle, be positioned at liquid runner periphery and still have an air flue.