Jetting device with novel protection type mounting structure

Abstract

The invention discloses an injection device with a novel protective mounting structure, which comprises a main body of the injection device, a nozzle is mounted at an outlet at the front end of the main body, and a converging block is connected between the main body and the nozzle; a first compressed air hole channel, a second compressed air hole channel and a paint hole channel are formed in the main body; a first compressed air confluence hole channel assembly, a second compressed air confluence hole channel assembly and a paint confluence hole channel which are in butt joint communication with the first compressed air hole channel, the second compressed air hole channel and the paint hole channel respectively are arranged in the confluence block, and a high-pressure output metal contact is further arranged in the confluence block. The confluence block is additionally arranged between the main body and the spray nozzle, and the confluence block provides two groups of compressed air conveying holes, one paint conveying hole and one high-voltage output contact for the paint spray nozzle, and has the functions of being detachable, convenient to maintain and capable of protecting the spray device main body.

Description

Technical Field

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

[0002] The working principle of a spraying device, such as a spray gun: at the front end of the spray gun, a paint delivery device is used to stably deliver the paint. Under the impact and mixing action of the air flow of compressed air at the paint outlet, the paint is fully atomized; another stream of compressed air is used to change the shape of the atomized paint and push the paint mist to cover the workpiece surface with a uniform coating.

[0003] In existing cases, for example, when spraying black paint on-site, if the paint nozzle of the spray gun has poor paint discharge or when changing to white for the second batch of parts, it is necessary to clean the inside of the paint nozzle of the spray gun. During the cleaning process, due to the structure problem of the paint outlet of the spray gun body, part of the cleaning agent and paint flow into the compressed air holes, and part of the paint residue remains at the root of the thread of the hole. After multiple cleanings, the compressed air holes are blocked, the installation at the thread position is not smooth, and forced screwing causes damage to the thread of the spray gun body. After the paint nozzle is installed, it is tilted and cannot be sealed, and finally the spray gun body needs to be replaced; The situations that occur during the process can be subdivided into the following three cases: 1) During the use of the spray gun, impurities in the paint block the paint nozzle, and part of the residue remains at the bottom of the thread of the spray gun body during the cleaning process; when firm objects such as residue remain, installing the paint nozzle causes the thread to be twisted and damaged the spray gun body; Thread seizure: This causes damage to the spray gun body, and later the paint nozzle is not tightly sealed, and only the spray gun body can be replaced, which is time-consuming and expensive; 2) During the cleaning process, the paint and thinner residues contaminate the air channels, resulting in poor formation of the paint mist during the subsequent spraying process and affecting the final spraying quality; 3) Compressed air blockage: The output of compressed air is unstable, and the air flow is insufficient, etc., resulting in weakened paint atomization ability and reduced product yield. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to overcome the deficiencies existing in the prior art, to provide a spraying device with a new type of protective installation structure.

[0005] The technical solution adopted by the present invention is: a spraying device with a new type of protective installation structure, including the main body of the spraying device, a nozzle assembly is installed at the front end outlet of the main body, and a manifold is connected between the main body and the nozzle; The bus bar block has a hollow cylindrical structure. On the outer wall of the bus bar block, an anti-rotation structure with plum blossom protrusions is arranged in the circumferential direction. During connection, the bus bar block is assembled with the main body by pressing the plum blossom protrusions into the plum blossom grooves on the main body. The front end of the bus bar block is connected to the nozzle assembly through a threaded structure; A first compressed air passage, a second compressed air passage, and a paint passage are provided on the main body. Inside the bus bar block, a first compressed air manifold passage assembly, a second compressed air manifold passage assembly, and a paint manifold passage that are respectively docked and communicated with the first compressed air passage, the second compressed air passage, and the paint passage are provided. A high-voltage output metal contact is also provided inside the bus bar block; The first compressed air manifold passage assembly includes a circular first pressure equalizing chamber. Four first compressed air manifold passages connected to the nozzle assembly are provided on the upper semi-circular surface of the first pressure equalizing chamber; The second compressed air manifold passage assembly includes a circular second pressure equalizing chamber. Four second compressed air manifold passages connected to the nozzle assembly are symmetrically arranged in pairs on the second pressure equalizing chamber; A sealing ring assembly is also provided between the main body and the bus bar block; A guiding structure assembly is also provided on the bus bar block. The guiding structure assembly includes a multi-claw fish guiding structure arranged at the rear end of the bus bar block and a guiding block arranged outside the paint manifold passage.

[0006] By adopting the above technical solution, the guiding structure assembly makes the parts centered during the installation process, avoiding damage caused by eccentric installation of the sealing ring; Further, the sealing ring assembly of the present invention includes a sealing ring between the first compressed air passage and the inside of the main body, a sealing ring between the first compressed air passage and the second compressed air passage, and a sealing ring between the second compressed air passage and the paint passage; By adopting the above technical solution, the closed isolation between multiple channels and the external sealing function are realized, further protecting the main body of the spraying device and extending the service life.

[0007] Further, the multi-claw fish guiding structure of the present invention includes three guiding cylinders with progressive extension lengths. There are gaps between the guiding cylinders, and a conductive screw is arranged inside the innermost guiding cylinder.

[0008] By adopting the above technical solution, the multi-claw fish guiding structure increases the creepage distance during high-voltage use;

[0009] Further, the first compressed air manifold passage of the present invention is arranged obliquely, and the second compressed air manifold passage is arranged horizontally; The main functions of the channel arrangements in two directions are to fully atomize and change the shape of the sprayed coating after atomization, respectively.

[0010] Furthermore, an anti - detachment convex ring is provided on the guiding block of the present invention. During installation, the anti - detachment convex ring is snapped into the anti - detachment groove on the main body.

[0011] Furthermore, the main body of the present invention is made of POM polyoxymethylene material, a polymer material, which has characteristics such as 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 returns to normal.

[0012] Furthermore, the manifold block of the present invention is made of PEEK polyetheretherketone material, a high - performance special engineering plastic, which has many excellent properties and application fields.

[0013] Mechanical properties: The tensile strength of PEEK is usually between 90 and 100 MPa, and it can withstand large mechanical stresses and remain stable under high - load conditions.

[0014] Heat resistance: PEEK can be used in high - temperature environments above 250 °C for a long time, with a melting point as high as 343 °C, and is suitable for medical equipment and aerospace components that require high - temperature sterilization.

[0015] Chemical resistance: PEEK shows extremely strong resistance to most chemical reagents, including acids, bases, and organic solvents, and is commonly used in corrosive medium transfer equipment in the chemical industry.

[0016] Furthermore, the nozzle assembly of the present invention includes a paint nozzle mechanism. An air cap is arranged outside the paint nozzle mechanism, and an electrode needle is arranged inside the paint nozzle mechanism.

[0017] The present invention has the following advantages compared with the prior art: The spraying device with a new type of protective installation structure of the present invention solves the problems existing in the prior art. 1. A manifold block is added between the main body and the nozzle. While the manifold block provides two groups of compressed air delivery holes, one paint delivery hole, and one high - voltage output contact to the paint nozzle, it has the functions of being detachable, convenient for maintenance, and protecting the main body of the spraying device. 2. The manifold block has high hardness, corrosion resistance, closed isolation between porous channels, and external sealing function, which further protects the main body of the spraying device and extends its service life. 3. After installing this manifold block part on the spraying device, no matter what damage is caused by improper cleaning or maintenance, only the manifold block will be damaged, which can avoid damage to the spray gun main body and save maintenance costs.

[0018] 4. In the present invention, the busbar block adopts the mutual cooperation of various guiding structures, anti - detachment structures, and plum - blossom positioning structures during installation, enabling the structure to have functions such as more convenient installation positioning and more accurate installation location. 5. The front end of the busbar block changes the conventional small - cone positioning design to a structure where after threaded connection, large - cone calibration is carried out, ensuring that after the paint nozzle is installed, it is easier to position accurately and reducing seal failure; the multi - claw fish structure at the tail is to increase the creepage distance during high - voltage use; (the leakage of high - voltage during actual use mainly appears in breakdown and creepage phenomena, and increasing the creepage distance can effectively improve the safety performance of high - voltage use). BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the busbar block in the present invention; Figure 3 is a schematic diagram showing the anti - rotation structure of the plum - blossom protrusion on the busbar block in the present invention; Figure 4 is a cross - sectional view of the busbar block in the present invention; Figure 5 is a schematic assembly structure diagram of the busbar block and the main body in the present invention.

[0020] Reference numerals in the figures: 1. Main body, 2. Busbar block, 3. Anti - rotation structure of plum - blossom protrusion, 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 pressure - equalizing chamber, 10. First compressed - air confluence channel, 11. Second pressure - equalizing chamber, 12. Second compressed - air confluence channel, 13. Multi - claw fish guiding structure, 14. Guide block, 15. Sealing ring, 16. Anti - detachment convex ring, 17. Conductive screw, 18. Paint nozzle mechanism, 19. Air cap, 20. Electrode needle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following details the embodiments of the present invention. The embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present invention is not limited to the following embodiments.

[0022] As Figures 1 to 5 shown, a spraying device with a new - type protective installation structure includes the main body 1 of the spraying device. A nozzle assembly is installed at the front - end outlet of the main body 1, and a busbar block 2 is connected between the main body 1 and the nozzle; The manifold block 2 is a hollow cylindrical structure, and a plum blossom convex anti-rotation structure 3 is arranged on the outer wall of the manifold block 2 in the 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 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. The main body 1 is provided with a first compressed air channel 4, a second compressed air channel 5 and a paint channel 6, and 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, and the manifold 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 arranged on the upper semicircular surface of the first pressure equalizing chamber 9; The second compressed air confluence channel assembly comprises a second pressure equalizing chamber 11 of 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; A sealing ring assembly is also provided between the main body 1 and the manifold block 2; A guide structure component is also provided on the confluence block 2 , and the guide structure component includes 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 .

[0023] 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; The polyclaw fish guide structure 13 comprises three guide cylinders with progressively extended lengths, with gaps between the guide cylinders, and a conductive screw 17 is arranged in the innermost guide cylinder.

[0024] 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; The guide block is also provided with an anti-dropping convex ring, which is inserted into the anti-dropping groove on the main body during installation.

[0025] 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 encountering high temperature, the size of the material will increase, and when the temperature drops, the size will recover.

[0026] The manifold is made of PEEK polyetheretherketone material, a high-performance special engineering plastic with many excellent properties and application areas.

[0027] The nozzle assembly includes a paint nozzle mechanism 18, an air cap 19 is arranged on the outer side of the paint nozzle mechanism 18, and an electrode pin 20 is arranged in the paint nozzle mechanism 18.

[0028] Working principle and process: 1. Place the spray gun body made of POM into the heating box for heat deformation test; 2. Install the sealing ring on the manifold block for standby; 3. Use a press to press the manifold block into the heated spray gun body. During the installation process, protect the appearance of the gun body to be intact. Confirm that the paint confluence channels on the manifold block are in the same direction as the paint channels on the main body. Compare the anti-rotation structure of the plum blossom protrusion on the manifold block with the position of the plum blossom groove on the main body and press it in; 4. During the spraying process, the front input ends of the first compressed air channel and the second compressed air channel are open loops, continuously outputting compressed air forward. After the compressed air enters the first pressure equalizing chamber and the second pressure equalizing chamber to stabilize the compressed air, it is then transmitted to the nozzle at the front end of the main body through the first compressed air confluence channel and the second compressed air confluence channel for output.

[0029] In the present invention, a transition connecting piece, the manifold block, is added, which has high hardness, corrosion resistance, closed isolation between multiple channels, and external sealing function, further protecting the main body of the spraying device and extending the service life; after installing this manifold block part on the spraying device, no matter the damage caused by improper cleaning or maintenance, only the manifold block will be damaged, which can avoid the damage of the spray gun body and save the maintenance cost.

Claims

1. A spraying device with a new type of protective installation structure, characterized in that: It includes a main body (1) of a spraying device. A nozzle assembly is installed at the front end outlet of the main body (1), and a manifold block (2) is connected between the main body (1) and the nozzle. The manifold block (2) has a hollow cylindrical structure. On the outer wall of the manifold block (2), a plum blossom convex anti-rotation structure (3) is arranged in the circumferential direction. During connection, the manifold block (2) is assembled with the main body (1) by pressing the plum blossom convex anti-rotation structure (3) into the plum blossom groove on the main body (1). The front end of the manifold block (2) is connected to the nozzle assembly through a threaded structure. On the main body (1), a first compressed air passage (4), a second compressed air passage (5), and a paint passage (6) are provided. Inside the manifold block (2), a first compressed air manifold passage assembly, a second compressed air manifold passage assembly, and a paint manifold passage (7) that are respectively docked and communicated with the first compressed air passage (4), the second compressed air passage (5), and the paint passage (6) are provided. A high-voltage output metal contact (8) is also provided inside the manifold block (2). The first compressed air manifold passage assembly includes a circular first pressure equalizing chamber (9). On the upper semi-circular surface of the first pressure equalizing chamber (9), four first compressed air manifold passages (10) connected to the nozzle assembly are provided. The second compressed air manifold passage assembly includes a circular second pressure equalizing chamber (11). Four second compressed air manifold passages (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). A guiding structure assembly is also provided on the manifold block (2). The guiding structure assembly includes a multi-claw fish guiding structure (13) arranged at the rear end of the manifold block (2) and a guiding block (14) arranged outside the paint manifold passage (7). The multi-claw fish guiding structure (13) includes three guiding cylinders with progressively arranged extending lengths. There are gaps between the guiding cylinders, and a conductive screw (17) is arranged inside the innermost guiding cylinder.

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

3. The injection device with a novel protective installation structure as described in claim 1, characterized in that: The first compressed air manifold passage (10) is arranged obliquely, and the second compressed air manifold passage (12) is arranged horizontally.

4. The jet device with a novel protective installation structure as claimed in claim 1, wherein: An anti-detachment convex ring (16) is also provided on the guiding block (14). During installation, the anti-detachment convex ring (16) is snapped into the anti-detachment groove on the main body (1).

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

6. The injection device with a new type of protective installation structure according to claim 1, characterized in that: The manifold block (2) is made of PEEK polyetheretherketone material.

7. The injection device with a novel protective installation structure according to claim 1, characterized in that: The nozzle assembly includes a paint nozzle mechanism (18). An air cap (19) is arranged outside the paint nozzle mechanism (18), and an electrode needle (20) is arranged inside the paint nozzle mechanism (18).

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