CN202398452U - Closed paint spraying system capable of recycling paint powder - Google Patents

Abstract

A closed paint spraying system for recycling paint powder, including a machine room, a material storage tank, and a conveyor belt. The machine room is equipped with an electrostatic spray gun, which is installed on a reciprocating mobile device. The pipe is connected to the paint powder pump on the top of the storage tank. The top of the machine room is equipped with an air-material separation box. The top of the air-material separation box is equipped with an air mixing chamber. The discharge hopper, the outlet at the bottom of the discharge hopper is connected to the paint powder pump, the paint powder pump is connected to the filter screen arranged on the top of the storage tank through the discharge pipe, and the bottom of the filter screen is connected to the storage tank. The utility model has the advantages of advanced coating technology and good coating quality. It overcomes the defects of the traditional electrostatic spraying process and greatly improves the performance of electrostatic spraying. It reduces the pollution to the environment during the painting process, and at the same time greatly reduces the labor intensity of workers and saves human resources.

Description

Closed paint powder recycling paint spraying system

technical field

The utility model relates to a paint spraying system, in particular to a closed paint powder recycling paint spraying system.

Background technique

The surface coating of existing automobile brake pads mainly adopts the electrostatic powder spraying method, that is, the powder coating is directly sprayed on the surface of the brake pads, and after baking, a coating surface with excellent performance can be obtained. However, there are many shortcomings in the current electrostatic spraying device: one is that the conveyor belt of the spraying device runs through the entire machine room, and a large section of it is exposed outside the machine room, and the paint powder sprayed by the spray gun will be taken out of the machine room with the movement of the conveyor belt, causing The paint powder is flying everywhere, which is harmful to the human body and the surrounding environment. The second is that the existing paint spraying device cannot timely and comprehensively recycle the paint powder, resulting in serious waste of paint powder, making the whole spraying process unable to realize continuous production, and the labor intensity for workers to clean up the paint powder in the recovery system is high.

Contents of the invention

The utility model mainly solves the technical problems such as the paint powder flying around in the surface coating of the existing automobile brake pads, causing great harm to the human body and the surrounding environment, serious waste of paint powder, and high labor intensity for workers to clean the paint powder.

The utility model also solves the technical problems of low efficiency and low degree of automation of the existing coating equipment.

The utility model solves the above-mentioned technical problems mainly through the following technical solutions: a closed paint powder recycling paint spraying system, including a machine room, a storage tank, and a conveyor belt. The gun is installed on the reciprocating mobile device. The electrostatic spray gun is connected to the paint powder pump on the top of the storage tank through the feeding pipe. The top of the machine room is equipped with an air-material separation box, and the top of the air-material separation box is equipped with an air mixing chamber. , the top of the air mixing chamber is equipped with an exhaust fan, the bottom of the air-material separation box is equipped with a hopper, the outlet at the bottom of the hopper is connected to the paint powder pump, and the paint powder pump is connected to the filter screen installed on the top of the storage tank through the discharge pipe. The bottom of the filter screen is connected with the storage tank;

There is a recovery hopper at the bottom of the machine room, the outlet at the bottom of the recovery hopper is connected to the suction pipe, the suction pipe is connected to the feed port of the gas-material separation box, and the outlet at the bottom of the recovery hopper is also connected to the material storage device through an air pressure balance pipe. The outlet of the dust filter on the top of the tank is connected, and the dust filter is connected to the storage tank;

The front wall of the machine room is provided with a workpiece entrance, the rear wall of the machine room is provided with a workpiece outlet, and air-tight curtains are provided at the workpiece entrance and the workpiece exit. The machine room is equipped with an in-room conveyor belt. There is a rear conveyor belt at the rear, and the end of the front conveyor belt is extended into the workpiece entrance to connect with the front end of the conveyor belt in the room. The end of the conveyor belt in the room is connected to the rear conveyor belt extending into the workpiece exit Successively, the end of the rear conveyor belt is sequentially connected with the drying line conveyor belt.

As a preference, a plurality of filter columns are vertically arranged in the air-material separation box, and the two ends of the filter columns are provided with end covers, and the upper end cover is provided with vent holes, and the vent holes communicate with the air mixing chamber, and the air mixing chamber is provided with Distribution pipe, the distribution pipe is connected with the high-pressure air pump, the distribution pipe is provided with a plurality of branch pipes corresponding to the filter column, the end of the branch pipe is provided with an air valve, the air nozzle of the air valve and the anti-jet pipe arranged on the central axis of the filter column The end of the anti-jet pipe is provided with an H-shaped nozzle.

As a preference, a plurality of small holes are provided on the straight pipe walls on both sides of the H-shaped nozzle, and the middle of the connecting pipe between the straight pipes on both sides communicates with the casing, and an airtight bearing is embedded in the casing. The shaft hole of the airtight bearing is sleeved on the anti-jet pipe. The pulse back blowing air is blown out from the hole on the H-shaped tube through the anti-jet nozzle, and the reaction force makes the H-shaped tube rotate rapidly to form an air knife, which scrapes away the powder accumulated on the surface of the filter element, so as to achieve the purpose of completely removing the powder accumulated on the surface of the filter element.

As a preference, the small holes of the left straight pipe are axially evenly distributed on the pipe wall at an angle range of 90° to 180°, and the small holes of the right straight pipe are axially distributed at an angle range of 0° to -90° on the pipe wall. to a uniform distribution.

Preferably, the shape of the filter column is cylindrical, the paper surface of the filter column has regular pleated vertical lines, and the ends of the pleats have arc transitions. The paper surface of the filter element is treated with polyurethane, which not only does not absorb moisture but also has extremely high mechanical strength against pulsed total blowback airflow.

Preferably, the air-tight curtain is formed by stacking and arranging a plurality of naturally drooping plastic strips.

Preferably, the mobile device includes a frame, on which a pair of reciprocating sprockets are arranged, a chain is wound around the sprockets, a guide rod is arranged at the bottom of the frame, a hanger is hung on the guide rod, and the top of the hanger Connected with the chain, the electrostatic spray gun is fixed at the bottom of the hanger.

As preferably, the rear conveyor belt includes a bracket on which front and rear support rollers are arranged, and tension rollers and intermediate rollers are arranged below the conveying surface formed by the front and rear support rollers. There is a driving roller, the conveyor belt is set on the front and rear support rollers, and the conveyor belt driving roller, and its outer surface bypasses the tension roller and the middle roller; the tension roller is set on the tension frame, and the tension frame is screwed to the bracket through the adjustment screw superior.

The conveyor belt of the utility model is composed of three sections, the workpiece entrance and the workpiece exit are equipped with air-tight curtains, and the conveyor belt in the room is completely set in the paint spraying room, so the airtightness is good, and the paint powder will not follow the movement of the conveyor belt Take it out of the machine room. The air-material separation box completely separates the recovered powder, and the H-shaped nozzle installed in the filter element can quickly rotate to form an air knife to scrape the accumulated powder on the surface of the filter element, so that all the paint powder can be recovered. The utility model has the advantages of advanced coating technology, good coating quality and the like. It overcomes the defects of the traditional electrostatic spraying process and greatly improves the performance of electrostatic spraying. It reduces the pollution to the environment during the painting process, and at the same time greatly reduces the labor intensity of workers and saves human resources.

Description of drawings

The technical solution of the present utility model will be further specifically described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is the structural representation of a kind of preferred embodiment of the present utility model;

Fig. 2 is a kind of structural representation of conveyor belt shown in Fig. 1;

Fig. 3 is a schematic structural diagram of the mobile device shown in Fig. 1;

Fig. 4 is the front view of the machine room shown in Fig. 1;

Fig. 5 is a schematic structural view of the filter column shown in Fig. 4;

Fig. 6 is the structural representation of H-shaped nozzle shown in Fig. 5;

Fig. 7 is a cross-sectional view along line A - A of Fig. 6 .

Detailed ways

Fig. 1 is a schematic structural view of a preferred embodiment of the present invention. The closed paint powder recycling paint spraying system mainly includes a high-pressure air pump 110, a machine room 5, a material storage tank 1, a conveyor belt 53, an electrostatic spray gun 51, and the like. The top of the machine room 5 is provided with an air-material separation box 7, the top of the air-material separation box 7 is provided with an air mixing chamber 71, the top of the air mixing chamber 71 is provided with an exhaust fan 72, and the bottom of the air-material separation box 7 is provided with a hopper 73, and the hopper 73 The outlet at the bottom is connected to the paint powder pump 731, and the paint powder pump 731 is connected to the filter screen 2 on the top of the storage tank 1 through the discharge pipe 23, and the bottom of the filter screen 2 is connected to the feed port of the storage tank 1.

The bottom of the machine room 5 is provided with a recovery bucket 52, the outlet at the bottom of the recovery bucket 52 is connected to the suction pipe 55, and the suction pipe 55 is connected to the feed port 6 of the air-material separation box 7; in order to ensure the balance of the system air pressure, the outlet at the bottom of the recovery bucket It is also connected with the outlet of the dust filter through an air pressure balance pipe. The dust filter 111 communicates with the storage tank and is arranged on the top of the storage tank 1 . The filter element of the dust filter 111 is made of composite long-fiber spunbonded polyester non-woven fabric, which can filter out the dust in the air of the storage tank. It has the characteristics of high dust filtering efficiency, simple installation, convenient use and maintenance.

The machine room 5 is equipped with an in-room conveyor belt 61, the front of the machine room 5 is provided with a front conveyor belt 62, and the rear of the machine room 5 is provided with a rear conveyor belt 63, and the end of the front conveyor belt 62 is extended to the workpiece entrance 53 and the inside of the room. The front end of the conveyor belt 61 is sequentially connected, and the conveyor belt 61 in the room is connected with the rear conveyor belt 63 extending to the workpiece outlet 56 in the machine room. The end of the rear conveyor belt 63 is connected with the conveyor belt 64 entering the paint powder drying line. catch.

It can be further seen from Fig. 2 that the rear conveyor belt 63 includes a bracket 65 on which front and rear support rollers (656, 657) are arranged, and tension rollers are arranged below the conveying surface formed by the front and rear support rollers (656, 657). 655 and the middle roller 651, the driving roller 652 is arranged below the middle position of the middle roller 651 and the tension roller 655, and the conveyor belt is sleeved on the front and rear support rollers (656, 657) and the conveyor belt driving roller 652. The surface bypasses the tension roller 655 and the middle roller 651 ; the tension roller 655 is arranged on the tension frame 653 , and the tension frame 653 is screwed on the bracket 65 through the adjusting screw 654 .

The front vertical wall of machine room 5 is provided with workpiece entrance 53, and the rear vertical wall of machine room 5 is provided with workpiece outlet 56, and both workpiece entrance 53 and workpiece exit 56 places are provided with air-tight curtain 57, and air-tight curtain 57 is formed by a plurality of naturally drooping plastic belts. The "one" characters are superimposed and arranged on each other (see Figure 4). The electrostatic spray gun 51 is installed on the reciprocating mobile device 59. The electrostatic spray gun 51 is connected to the paint powder pump 22 on the top 1 of the storage tank through the feed pipe 12. The feed pipe 12 is a rubber tube with a pressure resistance of 0.5 MPa. It is characterized by light weight and corrosion resistance.

As shown in Figure 3, mobile device 59 comprises frame 592, and guide rod 594 is suspended at the bottom of frame 592, and hanger 595 is suspended on guide rod 594, and hanger 595 is enclosed within on the guide rod 594 by guide sleeve 596, and frame 592 is provided with a pair of reciprocating sprockets 593, two sprockets 593 are wound with a chain 591, the top connector 597 of the hanger 595 is fixed on the chain 591, and the bottom end of the hanger 595 is fixed with an electrostatic spray gun 51. The pole needle or spray cup of electrostatic spraying gun 51 nozzles is metal, connects the negative pole of high-frequency high-voltage electrostatic generator. The high-frequency and high-voltage electrostatic generator supplies high voltage and low current for painting, and forms an electric field between the spray gun and the workpiece to be sprayed (the spray gun is connected to the negative pole, and the object to be sprayed is connected to the positive pole). The paint powder is pumped to the electrostatic spray gun by the paint powder in the storage tank, and enters the electromagnetic field from the nozzle to carry a negative charge, so it flies to the surface of the object to be sprayed with a positive charge. the

Fig. 4 is a front view of the machine room; Fig. 5 is a structural schematic diagram of a filter column. As shown in Fig. 4 and Fig. 5, a plurality of filter cartridge columns 74 are vertically arranged in the air-material separation box 7, and the outer shape of the filter cartridge columns 74 is in the shape of a garden, and the two ends of the filter cartridge columns 74 have end caps 741, and the end caps 741 are selected to be 8 mm. The above thick anti-rust steel plate is punched. The paper surface of the filter element column 74 has regular pleated vertical lines 741, and the pleated ends 743 have a circular arc transition, which increases the effective filtration area, achieves the best filtration efficiency and prolongs the service life. The paper surface of the filter element is treated with resin, which not only does not absorb moisture, but also has extremely high mechanical strength against pulse and total blowback airflow.

The upper end cover of the filter column 74 is provided with an exhaust hole 742, and the exhaust hole 742 communicates with the air mixing chamber 71. The air mixing chamber 71 is provided with a distribution pipe 75, and the distribution pipe 75 is connected with the high-pressure air pump 110 through the pipeline 112. A plurality of branch pipes 751 corresponding to the filter column are provided, and an air valve 76 is provided at the end of the branch pipe 751, and the air valve 76 is controlled by a single-chip microcomputer, and the non-contact output is switched. The single-chip microcomputer can be programmed to set the blowback time and pulse width.

The gas nozzle 761 of the air valve 76 is connected with the anti-jet pipe 79 arranged on the central axis of the filter element column, and the end of the anti-jet pipe 79 is provided with an H-shaped nozzle 77 . It can be seen from Fig. 6 and Fig. 7 that a plurality of small holes 773 are opened on the pipe walls of the straight pipes (771, 772) on both sides of the H-shaped nozzle 77, and the small holes 773 of the left straight pipe 771 are preferably formed in the pipe wall. The angular range of 90° to 180° is uniformly distributed in the axial direction, and the small holes 773 of the straight pipe 772 on the right side are preferably distributed axially evenly in the angular range of 0° to -90° on the pipe wall. The test proves that the efficiency of removing dust on the surface of the filter element is relatively high. high.

The middle of the connecting pipe 775 between the straight pipes (771, 772) on both sides communicates with the casing 78, and the casing 78 is embedded with an airtight bearing 783, and the shaft hole 781 of the airtight bearing 783 is sleeved on the anti-jet pipe 79 superior. The pulse back blowing airflow is blown out from the small holes on the left and right straight pipes of the H-shaped nozzle 77 through the anti-jet nozzle. The dust accumulated on the surface of the filter element can be completely removed.

Claims (8)

1. A closed paint powder recycling paint spraying system, comprising a machine room, a material storage tank, and a conveyor belt, is characterized in that the machine room is provided with an electrostatic spray gun, and the electrostatic spray gun is installed on a reciprocating mobile device. The spraying gun is connected to the paint powder pump on the top of the storage tank through the feeding pipe. The top of the machine room is equipped with an air-material separation box, and the top of the air-material separation box is equipped with an air mixing chamber. There is a drop hopper at the bottom of the separation box, the outlet at the bottom of the drop hopper is connected to the paint powder pump, the paint powder pump is connected to the filter screen installed on the top of the storage tank through the discharge pipe, and the bottom of the filter screen is connected to the storage tank; There is a recovery hopper at the bottom of the machine room, the outlet at the bottom of the recovery hopper is connected to the suction pipe, the suction pipe is connected to the feed port of the gas-material separation box, and the outlet at the bottom of the recovery hopper is also connected to the material storage device through an air pressure balance pipe. The outlet of the dust filter on the top of the tank is connected, and the dust filter is connected to the storage tank; The front wall of the machine room is provided with a workpiece entrance, the rear wall of the machine room is provided with a workpiece outlet, and air-tight curtains are provided at the workpiece entrance and the workpiece exit. The machine room is equipped with an in-room conveyor belt. There is a rear conveyor belt at the rear, and the end of the front conveyor belt is extended into the workpiece entrance to connect with the front end of the conveyor belt in the room. The end of the conveyor belt in the room is connected to the rear conveyor belt extending into the workpiece exit Successively, the end of the rear conveyor belt is sequentially connected with the drying line conveyor belt. 2. The closed paint powder recycling paint spraying system according to claim 1, characterized in that the rear conveyor belt includes a bracket, the bracket is provided with front and rear support rollers, and the front and rear support rollers form the conveying surface below There is a tension roller and an intermediate roller, and a driving roller is arranged below the middle position of the intermediate roller and the tension roller. The conveyor belt is sleeved on the front and rear support rollers and the conveyor belt driving roller, and its outer surface bypasses the tension roller and the intermediate roller. ; The tension roller is arranged on the tension frame, and the tension frame is screwed on the support through the adjusting screw rod. 3. The closed paint powder recycling paint spraying system according to claim 1 or 2, characterized in that a plurality of filter cartridge columns are vertically arranged in the gas-material separation box, and the two ends of the filter cartridge columns have end caps, and the upper end caps There is an exhaust hole, and the exhaust hole communicates with the air mixing chamber. There is a distribution pipe in the air mixing chamber. The distribution pipe is connected to the high-pressure air pump. There are multiple branch pipes corresponding to the filter column on the distribution pipe. Air valve, the air nozzle of the air valve is connected with the anti-jet pipe arranged on the central axis of the filter element column, and the end of the anti-jet pipe is provided with an H-shaped nozzle. 4. The closed paint powder recycling paint spraying system according to claim 3, characterized in that a plurality of small holes are provided on the walls of the straight pipes on both sides of the H-shaped spray pipe, and the connection between the straight pipes on both sides The middle of the pipe communicates with the sleeve pipe, and the sleeve pipe is filled with an airtight bearing, and the shaft hole of the airtight bearing is sleeved on the anti-jet pipe. 5. The closed paint powder recycling paint spraying system according to claim 4, characterized in that the small holes of the left straight pipe are axially evenly distributed on the pipe wall at an angle range of 90° to 180°, and the right straight pipe is axially evenly distributed. The small holes of the tube are uniformly distributed axially on the tube wall at an angle range of 0° to -90°. 6. The closed paint powder recycling paint spraying system according to claim 3, characterized in that the shape of the filter column is cylindrical, the paper surface of the filter column has regular pleated vertical lines, and the ends of the pleats are rounded. arc transition. 7. The closed paint powder recycling paint spraying system according to claim 1 or 2, characterized in that the air-tight curtain is formed by stacking and arranging a plurality of naturally drooping plastic belts. 8. The closed paint powder recycling painting system according to claim 2, characterized in that said moving device comprises a frame, a pair of reciprocating sprockets are arranged on the frame, a chain is wound around the sprockets, and the frame A guide rod is arranged at the bottom, a hanger is hung on the guide rod, the top of the hanger is connected with a chain, and the electrostatic spraying gun is fixed at the bottom of the hanger.

Images