CN216988182U

CN216988182U - Liquid material electrostatic spraying device

Info

Publication number: CN216988182U
Application number: CN202122306762.2U
Authority: CN
Inventors: 王芳芳; 何启航; 王振宇
Original assignee: Shaanxi Polytechnic Institute
Current assignee: Shaanxi Polytechnic Institute
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-07-19
Anticipated expiration: 2031-09-23

Abstract

The utility model discloses a liquid material electrostatic spraying device, and particularly relates to the field of chemical equipment.

Description

Liquid electrostatic spraying device

Technical Field

The utility model belongs to the field of chemical equipment, and particularly relates to a liquid material electrostatic spraying device.

Background

The corrosion-resistant conductive coating is a covering layer applied on the metal surface to isolate the metal surface from the surrounding medium so as to control the corrosion of the pipeline. The current methods for preparing the low-content MWCNTs/WPU anticorrosive conductive coating include a brushing method and an electrostatic spraying method. The integral performance of the anticorrosion conductive coating prepared by the brushing method is uneven, and the anticorrosion conductive coating prepared by the electrostatic spraying method solves the problems of uneven conductivity of the coating, low bonding strength between the coating and a metal matrix and the like. However, since the conventional electrostatic spraying equipment is used for electrostatic spraying of powder coating, if the electrostatic spraying method is used to prepare low content MWCNTs/WPU coating, it is necessary to design a spray gun capable of satisfying electrostatic spraying of liquid coating. Most of the existing spraying devices can not adjust the spraying area of the coating, so that waste is easily caused when metal with a small area is sprayed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a liquid material electrostatic spraying device, which aims to solve the problem that the spraying area of the existing electrostatic spraying device cannot be adjusted.

The technical purpose of the utility model is realized by the following technical scheme: a liquid material electrostatic spraying device comprises a spray gun, wherein a coating box is arranged at the lower end of the spray gun, a plug is in threaded connection with a barrel of the spray gun, a groove is formed in the left side of the plug, an electrode net is fixedly connected to the right side of the groove, a through hole through which a power supply wire passes is formed in the plug, the through hole is positioned right above the electrode net, a limiting ring is arranged in the groove, the right end of the limiting ring abuts against the electrode net, a spray pipe is arranged in the limiting ring, a circular ring is embedded in an outlet of the spray pipe and is in sliding connection with the spray pipe, a plurality of connecting rods are rotatably connected to the circular ring, the other end of each connecting rod is rotatably connected with a baffle, the other end of each baffle is rotatably connected to the spray pipe, a vertical rod penetrating through the spray pipe is hinged to the circular ring, a sliding groove is formed in the spray pipe, and is in sliding connection with the vertical rod, one side of the sliding groove is provided with a plurality of limiting grooves.

Principle and effect of the technology: when the spraying area needs to be changed, only the vertical rod needs to be slid to enable the circular ring to rotate, the connecting rod is driven to move when the circular ring rotates, the connecting rod drives one end of the separation blade to move towards the circle center of the spray pipe, when the separation blade moves, the overlapped area of the separation blade and the spray pipe changes continuously, and therefore the area of the coating during spraying is changed accordingly. The spraying device can adjust the spraying area at any time, reduce the waste generated during spraying and effectively reduce the production cost

Furthermore, an elastic rope is connected between the end points of the two adjacent separation blades, elastic cloth is connected between the elastic rope and the inner wall of the spray pipe, the elastic cloth is integrally annular, the middle opening of the elastic cloth is connected with the elastic rope, the outer side of the elastic cloth is connected with the inner wall of the spray pipe, and the area of the elastic cloth is larger than the cross-sectional area of the inner part of the spray pipe.

By adopting the scheme, the shape of the coating sprayed out from the spray pipe is fixed, so that no blank is left on the spraying surface during spraying, the spraying times are reduced, and the coating is saved.

Further, the plug and the nozzle are both made of epoxy resin.

By adopting the scheme, the price of the epoxy resin is cheaper than that of other high-molecular insulating materials, so that the cost of the spraying device can be reduced.

Furthermore, both ends of the bottom surface inside the spray pipe are recessed towards the center, the center is communicated with a recovery pipeline, and the other end of the recovery pipeline is communicated with a recovery box.

Adopt above-mentioned scheme, can retrieve the coating of remaining in the spray tube, also can make coating more smooth and easy when the spray tube is inside simultaneously.

Further, the lower side of the plug is fixedly connected with a handle made of an insulating material, and the upper surface of the handle is provided with threads.

By adopting the technical scheme, an operator can hold the handle below the plug with one hand and hold the handle of the spray gun with the other hand, so that the spraying device can be operated and controlled more conveniently.

Compared with the prior art, the utility model has the beneficial effects that: the spraying area of the coating can be adjusted at any time, the operation is simple, the nozzle does not need to be replaced, all the coatings can be recycled, the waste generated in the spraying process is reduced, and the anticorrosive conductive coating prepared by the spraying device has the advantages of uniform conductivity, high bonding strength between the coating and a metal substrate and the like.

Drawings

FIG. 1 is a schematic structural view of an electrostatic spraying apparatus for liquid materials according to the present invention;

FIG. 2 is a side view of the spout of the present invention;

FIG. 3 is a top view of the nozzle of the present invention;

in the figure: 1. a spray gun; 2. a paint tank; 3. a plug; 4. an electrode mesh; 5. a limiting ring; 6. a nozzle; 7. a handle; 8. a recovery pipeline; 9. a circular ring; 10. a connecting rod; 11. a vertical rod; 12. a baffle plate; 13. an elastic cord; 14. elastic cloth; 15. a chute; 16 limiting grooves.

Detailed Description

The following is a more detailed description of the present invention with reference to specific embodiments.

Example (b): as shown in fig. 1 and 3, an electrostatic liquid material spraying apparatus includes a spray gun 1, and a paint tank 2 is communicated with a lower portion of a gun body of the spray gun 1. The gun barrel of the spray gun 1 is connected with a plug 3 made of epoxy resin in a threaded mode, a handle 7 made of epoxy resin is adhered to the lower side of the plug 3, and threads are arranged on the surface of the handle 7 and can increase friction force in use. The left side of the plug 3 is provided with a groove, and the right side of the groove is bonded with an electrode net 4. The joint of the electrode net 4 and the plug 3 is provided with a through hole for passing a power supply lead, and a protective cap for preventing foreign matters from falling is inserted outside the through hole. The groove is internally threaded with a limiting ring 5, the limiting ring 5 is made of epoxy resin, the limiting ring 5 abuts against the electrode net 4, and the epoxy resin can be insulated, is economical in price and is convenient to process. Threaded connection has spray tube 6 on the inner wall of spacing ring 5, and spray tube 6 is inside to be the V font of both ends to middle indent, and the inside lowest intercommunication of spray tube 6 has recovery duct 8, and recovery duct 8's other end intercommunication has the collection box. The top of collection box is equipped with the opening, and the buckle has the block on the opening. The outlet of spray tube 6 inlays and is equipped with ring 9, and ring 9 and spray tube 6 sliding connection, the last movable riveting of ring 9 have four connecting rods 10, and the free end of every connecting rod 10 all movable riveting has a separation blade 12, and the free end movable riveting of every separation blade 12 is on spray tube 6, just can change the spraying area when separation blade 12 moves. An elastic rope 13 is connected between the end points of the two adjacent separation blades 12 far away from the riveting position, each section of elastic rope 13 is connected with an elastic cloth 14, and the outer side of each elastic cloth 14 is bonded on the inner wall of the spray pipe 6. The bungee cord 13 also moves with the flap 12 as the flap 12 moves. The ring 9 is hinged with a vertical rod 11 penetrating through the spray pipe 6, the spray pipe 6 is provided with a sliding groove 15 for the vertical rod 11 to slide, one side of the sliding groove 15 is provided with four limiting grooves 16, and the ring 9 can not move when the vertical rod 11 enters the limiting grooves 16.

When the paint spraying gun works, MWCNTs and WPU paints with different contents are mixed and filled into the paint box 2, then the protective cap is unscrewed to connect the power supply, the electrode mesh 4 and the metal matrix through electric leads, and then the liquid paint is sprayed out of the muzzle of the spray gun 1 through the spray gun 1 and flows through the electrode mesh 4. When the paint passes through the electrode mesh 4, the uncharged paint is converted into charged paint, an isobaric electric field is formed between the matrix and the muzzle of the spray gun 1 by the limiting ring 5, the charge of the fibrous conductive particles (such as MWCNTs) is higher than that of WPU resin, and the fibrous conductive particles can be erected in the sprayed liquid paint by means of electrostatic force under the additional positive and negative high pressure to form directional arrangement. After the paint is sprayed on the metal substrate, the anticorrosive conductive coating is formed after the paint is cured for a period of time. In addition, because the coating just electrostatically sprayed on the metal matrix is a liquid film layer and still has certain fluidity, the conductive particles can float up in the coating film layer under the action of the electric field force of the isobaric electrode between the metal matrix and the electrode mesh 4, and the problem of sinking of the conductive particles caused by the action of gravity is solved. When the spraying area needs to be adjusted, only the vertical rod 11 needs to be slid, the vertical rod 11 drives the circular ring 9 to rotate when sliding, the circular ring 9 drives the connecting rods 10 to move simultaneously, each connecting rod 10 drives the separation blade 12 to rotate when moving, and the spraying area is changed when the separation blade 12 moves. The paint remaining in the spray pipe 6 as the spray area changes is directed through a return line 8 into a return tank.

The above description is only an embodiment of the present invention, and the common general knowledge of the known specific structures and characteristics in the scheme is not described too much, it should be noted that, for those skilled in the art, it can make several variations and modifications without departing from the structure of the present invention, and these should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be defined by the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides a liquid material electrostatic spraying device, includes spray gun (1), its characterized in that: the coating box (2) is arranged at the lower end of the spray gun (1), a plug (3) is connected to the barrel of the spray gun (1) in a threaded manner, a groove is formed in the left side of the plug (3), an electrode net (4) is fixedly connected to the right side of the groove, a through hole for a power supply wire to pass through is formed in the plug (3), the through hole is located right above the electrode net (4), a limiting ring (5) is arranged in the groove, the right end of the limiting ring (5) abuts against the electrode net (4), a spray pipe (6) is arranged in the limiting ring (5), a circular ring (9) is embedded in an outlet of the spray pipe (6), the circular ring (9) is in sliding connection with the spray pipe (6), a plurality of connecting rods (10) are rotatably connected to the circular ring (9), a blocking piece (12) is rotatably connected to the other end of each connecting rod (10), and the other end of each blocking piece (12) is rotatably connected to the spray pipe (6), the spray pipe is characterized in that a vertical rod (11) penetrating through the spray pipe (6) is hinged to the circular ring (9), a sliding groove (15) is formed in the spray pipe (6), the vertical rod (11) is connected into the sliding groove (15) in a sliding mode, and a plurality of limiting grooves (16) are formed in one side of the sliding groove (15).

2. The electrostatic liquid spraying device according to claim 1, characterized in that: an elastic rope (13) is connected between the end points of the two adjacent baffle plates (12), elastic cloth (14) is connected between the elastic rope (13) and the inner wall of the spray pipe (6), the middle opening of the elastic cloth (14) is connected with the elastic rope (13), and the outer side of the elastic cloth (14) is connected with the inner wall of the spray pipe (6).

3. The electrostatic liquid spraying device according to claim 1, characterized in that: the plug (3) and the spray pipe (6) are both made of epoxy resin.

4. The electrostatic liquid spraying device according to claim 1, characterized in that: the two ends of the bottom surface inside the spray pipe (6) are recessed towards the center, the center is communicated with a recovery pipeline (8), and the other end of the recovery pipeline (8) is communicated with a recovery box.

5. An electrostatic spraying device for liquids as claimed in claim 1, characterized in that: the plug is characterized in that a handle (7) made of an insulating material is fixedly connected to the lower side of the plug (3), and threads are arranged on the upper surface of the handle (7).