CN1986076B - Sprayer - Google Patents

Abstract

The invention discloses a spraying device, which comprises a spray gun and a paint tank. The spray gun includes an air extraction pipe, an air filling pipe and a nozzle, and the nozzle communicates with the paint tank; the paint tank includes a tank body and a filter screen, the filter screen is arranged in the tank body and divides the tank body into an upper part and a lower part, and the tank body communicates with the atmosphere; The lower part of the tank body of the tank communicates with the exhaust pipe and the inflation pipe respectively through pipelines, and a valve body is arranged on the pipeline, and the valve body controls the communication and closing of the exhaust pipe and the inflation pipe with the tank body. The spraying device can make the paint pass through the filter net more quickly, and has better filtering effect, thereby improving the spraying effect.

Description

Spraying device

【Technical field】

The invention relates to a spraying device, in particular to a spraying device with a filtering device.

【Background technique】

Usually, we spray a layer of paint on the surface of various products such as computer cases, monitors, televisions, and even mobile phones, so as to achieve the effect of aesthetics and surface protection at the same time. The traditional spraying device is that the paint in the paint tank is sprayed directly after the trigger is pulled. However, paint spraying is a very delicate process, and there are usually poorly dispersed pigment aggregates in the paint. When this pigment aggregate is sprayed on the surface of the product, it will Cause coating film defects, make the product surface more easily damaged, and affect the appearance at the same time.

The Chinese patent No. 93218471.5 announced on May 18, 1994 discloses a spraying device, which is provided with a filter cup in the paint tank, and a filter screen is arranged in the filter cup, thereby filtering the poorly dispersed pigment aggregates in the paint , so that the sprayed paint is more uniform, so that the spraying effect is better. Yet the shortcoming of this spraying device is, its filter screen is to pass through the filter screen by the gravity of paint, because the general viscosity of paint is higher, so it is difficult to pass through the filter screen, so the filtering speed is slower, in addition, if the filter screen If the grid is large, the filtering effect will not be good.

【Content of invention】

In view of this, it is necessary to provide a spraying device with filtering device, good filtering effect and fast speed.

The spraying device includes a spray gun and a paint tank. The spray gun includes a suction pipe, an air pipe and a nozzle, and the nozzle communicates with the paint can; The lower part of the tank body of the tank communicates with the exhaust pipe and the inflation pipe respectively through pipelines, and a valve body is arranged on the pipeline, and the valve body controls the communication and closing of the exhaust pipe and the inflation pipe with the tank body.

Compared with the prior art, the spraying device of the present invention extracts the gas in the lower part of the tank body through the air extraction pipe, so that the air pressure in the lower part of the tank body is lower than the air pressure in the upper part, so that the paint passes through the filter screen quickly under the action of pressure, and the filtering effect is better. good.

【Description of drawings】

Fig. 1 is a partial cross-sectional view of a preferred embodiment of the spraying device of the present invention in a non-working state.

Fig. 2 is a partial cross-sectional view of a preferred embodiment of the spraying device of the present invention in the suction and filtration state.

Fig. 3 is a partial sectional view of the spraying state of a preferred embodiment of the spraying device of the present invention.

【Detailed ways】

Referring to FIG. 1 , a spraying device 10 according to a preferred embodiment of the present invention includes a spray gun 102 and a paint tank 104 .

A transverse channel 1022 is disposed in the spray gun 102 . A piston 1024 is slidably disposed in the transverse channel 1022, and the piston 1024 is in close contact with the inner wall of the transverse channel 1022 so that gas cannot pass through. A horizontal L-shaped vent pipe 1026 is opened in the piston 1024 . One end of the transverse channel 1022 offers an outlet (not marked), and an air delivery pipe 106 and an air injection pipe 109 are all communicated with the outlet, the air delivery pipe 106 includes a first output port 1062, and the air injection pipe 109 includes a first The input port 1094, the air delivery pipe 106 and the air injection pipe 109 are respectively provided with a one-way valve 1064, 1092. Also be provided with an air extraction pipe 1027 and an inflation pipe 1028 in this spray gun 102, this air extraction pipe 1027 communicates with a vacuum pump (not shown in figure), this inflation pipe 1028 communicates with an air compressor (figure not shown), this air extraction pipe 1027 and inflation pipe 1028 communicate with the transverse channels 1022 respectively. The exhaust tube 1027 , the inflation tube 1028 and the outlets of the transverse passage 1022 are arranged in sequence along the sliding direction of the piston 1024 and communicate with the transverse passage 1022 .

The spray gun 102 also includes a nozzle 1029 and a trigger 110 at the end thereof. The paint is sprayed from the nozzle 1029, and the nozzle 1029 also includes a spray outlet (not shown in the figure), an atomizing device (not shown in the figure), etc., which can be a general structure, so it will not be repeated here. One end of the trigger 110 is rotatably connected to the spray gun 102 through a screw or pin (not shown), and its middle part is connected with a connecting rod 112 . Two ends of the connecting rod 112 are respectively connected to the trigger 110 and the piston 1024 in the spray gun 102 through a hinge, so that the connecting rod 112 can rotate relative to the trigger 110 and the piston 1024 respectively. Two elastic stops 1030 are arranged on the spray gun 102 to limit the position of the trigger 110 . Pulling the trigger 110 can push the connecting rod 112 and then push the piston 1024 , so that the air pipe 1026 of the piston 1024 communicates with the air extraction pipe 1027 and the air filling pipe 1028 respectively.

The paint can 104 includes a can body 1042 , a cover 1044 and a filter 1046 . The tank body 1042 is a cylinder with one end open and the other end closed, which is divided into an upper part 1048 and a lower part 1050 by the filter 1046 . The cover body 1044 covers the tank body 1042 to close the open end of the tank body 1042, and a plurality of through holes 1052 are opened on it, so that the upper part 1048 of the tank body 1042 communicates with the atmosphere. This paint tank 104 also comprises the spraying pipe 1054 of a second output port 1055 and the gas inlet pipe 1057 of a second input 1058, and the spraying pipe 1054 is provided with a one-way valve 1056, and the spraying pipe 1054 and the gas inlet pipe 1057 are all connected with the tank. The lower part 1050 of the body 1042 is connected, and the spraying pipe 1054 is connected to the bottom of the lower part 1050 , and the air inlet pipe 1057 is connected to the bottom of the lower part 1050 . The second output port 1055 of the spray pipe 1054 is connected with the first input port 1094 of the air spray pipe 109. The output port 1062 is connected.

When the spraying device 10 is not in use, the trigger 110 is in a first position. At this moment, the breather pipe 1026 of the piston 1024 is not in communication with the exhaust pipe 1027 and the inflation pipe 1028, which is the state shown in FIG. 1 .

When using this spraying device 10 to spray paint, first pull the trigger 110, the piston 1024 slides in the transverse channel 1022, and when the trigger 110 hits the stopper 1030 closer to the trigger, the breather pipe 1026 of the piston 1024 communicates with the exhaust pipe 1027, The vacuum pump draws air outward from the exhaust pipe 1027. At this time, the one-way valve 1064 is opened, and the one-way valves 1092, 1056 are closed, so that the gas in the bottom 1050 of the tank body 1042 of the paint tank 104 is sucked out, and the bottom 1050 of the tank body 1042 is exhausted. The air pressure of the tank body 1042 is lower than the air pressure of the upper part 1048, and the paint in the upper part 1048 of the tank body 1042 passes through the filter screen 1046 and enters the lower part 1050 under the action of pressure, so that the paint is filtered by the filter screen 1046 to realize suction filtration, which is the state shown in Figure 2 Continue to pull the trigger 110, the trigger 110 hits another block 1030, the piston 1024 continues to slide in the transverse channel 1022, when the trigger 110 hits another block 1030, the vent pipe 1026 of the piston 1024 communicates with the inflation pipe 1028 , the air compressor inflates toward the inflatable pipe 1028. At this time, the one-way valve 1064 is closed, the one-way valves 1056, 1092 are opened, and the paint in the lower part 1050 of the tank body 1042 of the paint tank 104 flows into the spraying pipe 1054 due to gravity and air flow. The paint is sprayed out of the spraying device 10 from the nozzle 1029 under the action of the gas in the spray pipe 109 to realize the spraying of the paint, which is the state shown in FIG. 3 .

It can be understood that the paint tank 104 can be directly installed on the spray gun 102 of the spraying device 10 , and it can also be separated from the spray gun 102 . The through holes 1052 of the cover body 1044 can be any number. In addition, the air inlet pipe 1057, the air delivery pipe 106 and the one-way valve 1056, 1064, 1092 can be omitted, and a one-way valve is set close to the nozzle 1029, so that the one-way valve is closed during pumping, and the tank body 1042 bottom 1050 The gas is drawn out through the spraying pipe 1054 and the spraying pipe 109. When inflated, the one-way valve is opened under the action of the gas, and the paint flows out from the spraying pipe 1054 and is sprayed out of the nozzle 1029 under the action of the gas.

Claims (11)

1. a kind of spraying device, it comprises spray gun and paint tank, and spray gun comprises nozzle, and nozzle communicates with paint tank, and paint tank comprises tank body, it is characterized in that: spray gun also comprises suction pipe and gas filling pipe; Paint tank also comprises filter screen, The filter screen is set in the tank body to divide the tank body into an upper part and a lower part. The tank body communicates with the atmosphere; Control the connection and closure of the exhaust pipe and the inflation pipe with the tank body. 2. spraying device as claimed in claim 1, is characterized in that: this pipeline comprises the air pipe that is located on the spray gun and the spray pipe and the spray pipe that is located on the paint tank and the air inlet pipe, the air pipe of the spray gun and the paint tank The air inlet pipe is communicated, and the spray pipe of the spray gun is communicated with the spray pipe of the paint tank. 3. The spraying device as claimed in claim 2, characterized in that: the spray gun is provided with a channel, and the channel is provided with a slidable piston airtightly combined with the channel, and the channel and the exhaust pipe, the channel and the inflatable tube are provided in the piston. The air pipe connected by the pipe is provided with an outlet at one end of the channel. 4. spraying device as claimed in claim 3, it is characterized in that: the air delivery pipe of this spray gun and the air spray pipe are communicated with passage by described outlet, and valve body comprises the spraying that is respectively arranged at the air delivery pipe of spray gun, air spray pipe and paint tank. The one-way valve on the pipe, the air extraction pipe, the inflation pipe and the outlet are arranged in sequence along the sliding direction of the piston to communicate with the passage in the spray gun. 5. spraying device as claimed in claim 1, is characterized in that: this pipeline comprises the spray pipe that is located on the spray gun and the spray pipe that is located on the paint tank, the spray pipe of spray gun, nozzle and the spray pipe of paint tank communicate with each other . 6. The spraying device as claimed in claim 5, characterized in that: the spray gun is provided with a channel, the channel is provided with a slidable piston that is airtightly combined with the channel, and the channel and the exhaust pipe, the channel and the air-inflating tube can be connected to each other in the piston. The air pipe connected by the pipe is provided with an outlet at one end of the channel. 7. The spraying device according to claim 6, characterized in that: the air delivery pipe of the spray gun communicates with the passage through the outlet, the valve body includes a one-way valve located near the nozzle, the air extraction pipe, the inflation pipe and the outlet They are arranged sequentially along the sliding direction of the piston and communicate with the passage in the spray gun. 8. The spraying device according to claim 4 or 7, characterized in that: the spraying device also includes a trigger and a connecting rod, the two ends of the connecting rod are respectively connected with the trigger and the piston through a rotatable hinge, and the trigger can rotate relative to the spray gun Thereby driving the connecting rod and the piston to move together. 9. The spraying device according to claim 8, characterized in that: the spray gun is provided with two stoppers, when the trigger hits one stopper, the breather pipe of the piston communicates with the exhaust pipe and the channel, and the trigger hits another stopper , the breather pipe of the piston communicates with the inflation pipe and the channel. 10. The spraying device according to claim 1, characterized in that: the paint tank further comprises a cover, the cover is provided with at least one through hole, one end of the tank is open and the other end is closed, and the cover is arranged on the tank. body open end. 11. The spraying device as claimed in claim 1, characterized in that: the suction pipe is connected with a vacuum pump, and the inflation pipe is connected with an air pressure pump.

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