A spray device with a new protective installation structure

Abstract

The present invention discloses a spray device with a novel protective mounting structure, comprising a main body of the spray device, a nozzle installed at the front end outlet of the main body, and a junction block connected between the main body and the nozzle; a first compressed air channel, a second compressed air channel and a paint channel are provided on the main body, and a first compressed air junction channel assembly, a second compressed air junction channel assembly and a paint junction channel are provided inside the junction block, which are respectively connected to the first compressed air channel, the second compressed air channel and the paint channel, and a high-voltage output metal contact is also provided in the junction block; the present invention adds a junction block between the main body and the nozzle, and the junction block provides the paint nozzle with two groups of compressed air delivery holes, one paint delivery hole and one high-voltage output contact, and has the functions of being detachable, convenient for maintenance and protecting the main body of the spray device.

Description

Technical Field

[0001] The invention relates to the technical field of industrial spraying equipment structures, in particular to a spraying device with a novel protective installation structure. Background Art

[0002] The working principle of a spray device, such as a spray gun, is as follows: a paint delivery device is used at the front end of the spray gun to stably deliver paint, and the paint is fully atomized at the paint outlet under the impact and mixing effect of the compressed air flow; another stream of compressed air is used to change the shape of the atomized paint, pushing the paint mist to cover the surface of the workpiece evenly.

[0003] In existing cases, for example, when spraying black paint on site, the paint nozzle is not dispensing smoothly, or the second batch of parts are changed to white, the paint nozzle of the spray gun needs to be cleaned internally. During the cleaning process, due to the problem of the paint outlet structure of the spray gun body, some detergent and paint flow into the compressed air hole, and some paint residue remains at the thread root of the hole. After repeated cleaning, the compressed air hole is blocked, the thread position is not installed smoothly, and hard tightening causes damage to the thread of the spray gun body. The paint nozzle is tilted after installation, resulting in a seal failure, and the spray gun body finally needs to be replaced.

[0004] The situations that occur during the process can be divided into the following three situations:

[0005] 1) When the spray gun is in use, debris in the paint clogs the paint nozzle, and some residue remains at the bottom of the thread of the spray gun body during the cleaning process; when solid objects such as debris remain, the thread is twisted and damaged when the paint nozzle is installed;

[0006] Thread seizure: This damages the spray gun body, resulting in poor sealing of the paint nozzle. The spray gun body can only be replaced, which is time-consuming and expensive.

[0007] 2) During the cleaning process, paint and thinner residues contaminate the air ducts, resulting in poor paint mist formation in the subsequent spraying process, affecting the final spraying quality;

[0008] 3) Compressed air blockage: Unstable compressed air output and insufficient air flow will weaken the paint atomization ability and reduce the product yield. Summary of the Invention

[0009] The technical problem to be solved by the present invention is: in order to overcome the deficiencies in the prior art, a spray device with a novel protective installation structure is provided.

[0010] The technical solution adopted by the present invention is: a spray device with a new protective installation structure, comprising a main body of the spray device, a nozzle assembly installed at the front end outlet of the main body, and a manifold connected between the main body and the nozzle;

[0011] The manifold block is a hollow cylindrical structure, and a plum blossom-shaped protrusion anti-rotation structure is provided on the outer wall of the manifold block in the circumferential direction. When connected, the plum blossom-shaped protrusion anti-rotation structure is pressed into the plum blossom groove on the main body to realize the assembly of the manifold block and the main body. The front end of the manifold block is connected to the nozzle assembly through a threaded structure.

[0012] The main body is provided with a first compressed air channel, a second compressed air channel and a paint channel, and the manifold block is provided with a first compressed air converging channel assembly, a second compressed air converging channel assembly and a paint converging channel respectively connected to the first compressed air channel, the second compressed air channel and the paint channel, and the manifold block is also provided with a high-voltage output metal contact;

[0013] The first compressed air confluence channel assembly includes a first pressure equalizing chamber with a circular structure, and four first compressed air confluence channels connected to the nozzle assembly are provided on the upper semicircular surface of the first pressure equalizing chamber;

[0014] The second compressed air confluence channel assembly includes a second pressure equalizing chamber with a circular structure, and four second compressed air confluence channels connected to the nozzle assembly are symmetrically arranged in pairs on the second pressure equalizing chamber;

[0015] A sealing ring assembly is also provided between the main body and the busbar;

[0016] The confluence block is also provided with a guide structure component, which includes a multi-claw fish guide structure provided at the rear end of the confluence block and a guide block provided outside the paint confluence channel.

[0017] By adopting the above technical solution, the guide structure assembly enables the parts to be centered during the installation process, thus avoiding damage caused by eccentric installation of the sealing ring;

[0018] Furthermore, the sealing ring assembly of the present invention includes a sealing ring between the first compressed air duct and the interior of the main body, a sealing ring between the first compressed air duct and the second compressed air duct, and a sealing ring between the second compressed air duct and the paint duct;

[0019] By adopting the above technical solution, the closed isolation between the multiple channels and the sealing function with the outside are achieved, which further protects the main body of the injection device and extends the service life.

[0020] Furthermore, the multi-claw fish guide structure described in the present invention includes three guide cylinders with progressively extended lengths, with gaps left between the guide cylinders, and a conductive screw is provided in the innermost guide cylinder.

[0021] By adopting the above technical solution, the multi-claw fish guide structure increases the creepage distance during high voltage use;.

[0022] Furthermore, the first compressed air confluence channel of the present invention is arranged obliquely, and the second compressed air confluence channel is arranged horizontally;

[0023] The main functions of the hole arrangements in the two directions are to fully atomize and change the shape of the spray after atomization.

[0024] Furthermore, the guide block of the present invention is also provided with an anti-slip convex ring, which is inserted into the anti-slip groove on the main body during installation.

[0025] Furthermore, the main body described in the present invention is made of POM polyformaldehyde material, a polymer material, and has the characteristics of high strength, high rigidity, wear resistance, corrosion resistance, strong chemical resistance, smooth surface, and not easy to deform; when encountering high temperature, the material size becomes larger, and when the temperature drops, the size recovers.

[0026] Furthermore, the busbar of the present invention is made of PEEK polyetheretherketone material, a high-performance special engineering plastic with many excellent properties and application fields.

[0027] Mechanical properties: PEEK's tensile strength is typically between 90 and 100 MPa, allowing it to withstand large mechanical stresses and remain stable under high load conditions.

[0028] Heat resistance: PEEK can be used for a long time in high temperature environments above 250°C, with a melting point as high as 343°C, making it suitable for medical devices and aerospace components that require high-temperature sterilization.

[0029] Chemical resistance: PEEK exhibits strong resistance to most chemical reagents, including acids, alkalis, and organic solvents, and is often used in corrosive media transmission equipment in the chemical industry.

[0030] Furthermore, the nozzle assembly of the present invention includes a paint nozzle mechanism, an air cap is provided on the outside of the paint nozzle mechanism, and an electrode needle is provided inside the paint nozzle mechanism.

[0031] Compared with the prior art, the present invention has the following advantages: the spray device with a new protective installation structure solves the problems existing in the prior art.

[0032] 1. A manifold block is added between the main body and the nozzle. The manifold block provides two sets of compressed air delivery holes, one paint delivery hole, and one high-voltage output contact to the paint nozzle. It is also removable, easy to maintain, and protects the main body of the spray device.

[0033] 2. The manifold has high hardness, corrosion resistance, closed isolation between multiple channels, and sealing function with the outside, which further protects the main body of the injection device and extends its service life;

[0034] 3. After the spray device is installed with this manifold part, no matter if it is damaged due to improper cleaning or maintenance, only the manifold will be damaged, which can avoid damage to the spray gun body and save maintenance costs.

[0035] 4. The busbar of the present invention adopts the mutual cooperation of various guiding structures, anti-slip structures and plum blossom positioning structures during installation, so that the structure has the functions of more convenient installation and more accurate installation position;

[0036] 5. The conventional small-cone positioning design at the front end of the busbar has been replaced with a large-cone calibration structure after threaded connection to ensure that the paint nozzle is easier to position accurately after installation and reduce sealing failure; the multi-claw fish structure at the tail is used to increase the creepage distance during high-voltage use; (the leakage of high voltage in actual use mainly occurs through breakdown and creepage. Increasing the creepage distance can effectively improve the safety performance of high-voltage use). BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the present invention;

[0038] Figure 2 It is a structural schematic diagram of the busbar in the present invention;

[0039] Figure 3 This is a schematic diagram of the anti-rotation structure of the plum blossom protrusion on the busbar in the present invention;

[0040] Figure 4 is a cross-sectional view of the busbar of the present invention;

[0041] Figure 5 It is a schematic diagram of the assembly structure of the bus block and the main body in the present invention.

[0042] Numbers in the figure: 1. Main body, 2. Confluence block, 3. Plum blossom raised anti-rotation structure, 4. First compressed air channel, 5. Second compressed air channel, 6. Paint channel, 7. Paint confluence channel, 8. High-voltage output metal contact, 9. First equalizing chamber, 10. First compressed air confluence channel, 11. Second equalizing chamber, 12. Second compressed air confluence channel, 13. Multi-claw fish guide structure, 14. Guide block, 15. Sealing ring, 16. Anti-slip convex ring, 17. Conductive screw, 18. Paint nozzle mechanism, 19. Air cap, 20. Electrode needle. DETAILED DESCRIPTION

[0043] The embodiments of the present invention are described in detail below. The embodiments are implemented based on the technical solutions of the present invention, and detailed implementation methods and specific operating processes are given. However, the protection scope of the present invention is not limited to the following embodiments.

[0044] like Figures 1 to 5 The spray device shown has a novel protective installation structure, comprising a main body 1 of the spray device, a nozzle assembly installed at the front outlet of the main body 1, and a manifold 2 connected between the main body 1 and the nozzle;

[0045] The manifold block 2 is a hollow cylindrical structure. A plum blossom-shaped anti-rotation structure 3 is provided on the outer wall of the manifold block 2 in the circumferential direction. When connected, the plum blossom-shaped anti-rotation structure 3 is pressed into the plum blossom groove on the main body 1 to achieve the assembly of the manifold block 2 and the main body 1. The front end of the manifold block 2 is connected to the nozzle assembly through a threaded structure.

[0046] The main body 1 is provided with a first compressed air channel 4, a second compressed air channel 5 and a paint channel 6. The manifold block 2 is provided with a first compressed air converging channel assembly, a second compressed air converging channel assembly and a paint converging channel 7 which are connected to the first compressed air channel 4, the second compressed air channel 5 and the paint channel 6 respectively. The manifold block 2 is also provided with a high-voltage output metal contact 8;

[0047] The first compressed air confluence channel assembly includes a first pressure equalizing chamber 9 of a circular structure, and four first compressed air confluence channels 10 connected to the nozzle assembly are provided on the upper semicircular surface of the first pressure equalizing chamber 9;

[0048] The second compressed air confluence channel assembly includes a second pressure equalizing chamber 11 of a circular structure, and four second compressed air confluence channels 12 connected to the nozzle assembly are symmetrically arranged in pairs on the second pressure equalizing chamber 11;

[0049] A sealing ring assembly is also provided between the main body 1 and the manifold block 2;

[0050] The confluence block 2 is also provided with a guide structure assembly, which includes a multi-claw fish guide structure 13 arranged at the rear end of the confluence block 2 and a guide block 14 arranged outside the paint confluence channel 7.

[0051] The sealing ring assembly includes a sealing ring between the first compressed air channel and the interior of the main body, a sealing ring between the first compressed air channel and the second compressed air channel, and a sealing ring between the second compressed air channel and the paint channel;

[0052] The multi-claw fish guide structure 13 includes three guide cylinders with progressively extended lengths, with gaps between the guide cylinders. A conductive screw 17 is provided in the innermost guide cylinder.

[0053] The first compressed air confluence channel is arranged in an oblique direction, and the second compressed air confluence channel is arranged in a horizontal direction;

[0054] The guide block is also provided with an anti-slip convex ring, which is clamped into the anti-slip groove on the main body during installation.

[0055] The main body is made of POM polyoxymethylene material, a polymer material with the characteristics of high strength, high rigidity, wear resistance, corrosion resistance, strong chemical resistance, smooth surface, and not easy to deform. When exposed to high temperature, the material size will increase, and when the temperature drops, the size will recover.

[0056] The manifold is made of PEEK polyetheretherketone (PEEK), a high-performance special engineering plastic with many excellent properties and applications.

[0057] The nozzle assembly includes a paint nozzle mechanism 18 , an air cap 19 is provided on the outside of the paint nozzle mechanism 18 , and an electrode needle 20 is provided inside the paint nozzle mechanism 18 .

[0058] Working principle and process:

[0059] 1. Place the spray gun body POM into the heating box and perform heating deformation test;

[0060] 2. Install the sealing ring on the manifold and set aside;

[0061] 3. Use a press to press the manifold into the heated spray gun body. Protect the gun body's appearance during the installation process. Confirm that the paint confluence channels on the manifold are in the same direction as the paint channels on the main body. Compare the positions of the manifold's anti-rotation structure and the main body's plum blossom grooves, and press in.

[0062] 4. During the spraying process, the front input ends of the first compressed air channel and the second compressed air channel are open-loop, and compressed air is continuously output forward. After the compressed air enters the first pressure equalizing tank and the second pressure equalizing tank respectively to stabilize the compressed air, it is then transmitted to the nozzle output at the front end of the main body through the first compressed air confluence channel and the second compressed air confluence channel.

[0063] The present invention adds a transition connector busbar, which has high hardness, corrosion resistance, closed isolation between multiple channels, and sealing function with the outside, further protecting the main body of the injection device and extending the service life; after the injection device is installed with this busbar part, no matter whether it is damaged by improper cleaning or maintenance, only the busbar will be damaged, which can avoid damage to the spray gun main body and save maintenance costs.

Claims

1. A spray device with a new protective mounting structure, characterized in that: It comprises a main body (1) of the injection device, a nozzle assembly is installed at the front end outlet of the main body (1), and a manifold (2) is connected between the main body (1) and the nozzle; The confluence block (2) is in the shape of a hollow cylinder. A plum blossom convex anti-rotation structure (3) is provided on the outer wall of the confluence block (2) in a circumferential direction. When connected, the plum blossom convex anti-rotation structure (3) is pressed into the plum blossom groove on the main body (1) to realize the assembly of the confluence block (2) and the main body (1). The front end of the confluence block (2) is connected to the nozzle assembly via a threaded structure. The main body (1) is provided with a first compressed air duct (4), a second compressed air duct (5) and a paint duct (6); the confluence block (2) is provided with a first compressed air confluence duct assembly, a second compressed air confluence duct assembly and a paint confluence duct (7) which are connected to the first compressed air duct (4), the second compressed air duct (5) and the paint duct (6) respectively; the confluence block (2) is also provided with a high-voltage output metal contact (8); The first compressed air confluence channel assembly comprises a first pressure equalizing chamber (9) of a circular structure, and four first compressed air confluence channels (10) connected to the nozzle assembly are provided on the upper semicircular surface of the first pressure equalizing chamber (9); The second compressed air converging channel assembly comprises a second pressure equalizing chamber (11) of a circular structure, and four second compressed air converging channels (12) connected to the nozzle assembly are symmetrically arranged in pairs on the second pressure equalizing chamber (11); A sealing ring assembly is also provided between the main body (1) and the manifold block (2); The confluence block (2) is also provided with a guide structure assembly, the guide structure assembly comprising a multi-claw fish guide structure (13) provided at the rear end of the confluence block (2) and a guide block (14) provided outside the paint confluence channel (7); The multi-claw fish guide structure (13) comprises three guide cylinders with progressively extended lengths, with gaps left between the guide cylinders, and a conductive screw (17) is provided in the innermost guide cylinder.

2. The spray device with a novel protective mounting structure according to claim 1, characterized in that: The sealing ring assembly includes a sealing ring (15) between the first compressed air duct (4) and the interior of the main body (1), a sealing ring (15) between the first compressed air duct (4) and the second compressed air duct (5), and a sealing ring (15) between the second compressed air duct (5) and the paint duct (6).

3. The spray device with a novel protective mounting structure according to claim 1, characterized in that: The first compressed air confluence channel (10) is arranged in an oblique direction, and the second compressed air confluence channel (12) is arranged in a horizontal direction.

4. The spray device with a novel protective mounting structure according to claim 1, characterized in that: The guide block (14) is also provided with an anti-slip convex ring (16), and during installation, the anti-slip convex ring (16) is snapped into the anti-slip groove on the main body (1).

5. The spray device with a novel protective mounting structure as claimed in claim 1, characterized in that: The main body (1) is made of POM polyoxymethylene material.

6. The spray device with a novel protective mounting structure according to claim 1, characterized in that: The bus block (2) is made of PEEK polyetheretherketone material.

7. The spray device with a novel protective mounting structure according to claim 1, characterized in that: The nozzle assembly comprises a paint nozzle mechanism (18), an air cap (19) is provided on the outside of the paint nozzle mechanism (18), and an electrode needle (20) is provided inside the paint nozzle mechanism (18).

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