Novel thermal spraying nozzle capable of improving uniformity of coating

Abstract

The novel thermal spraying nozzle comprises a nozzle body, a flow guide cover is arranged outside the nozzle body, a limiting ring is arranged in the flow guide cover, a flow guide assembly is arranged in the flow guide cover, and the bottom of the flow guide assembly makes contact with the limiting ring. The flow guide assembly comprises a circular cover plate in threaded fit with the inner surface of the internal thread, the circular cover plate is provided with three air inlet grooves, first filter screens are arranged on the three air inlet grooves, a driving part is arranged at the bottom of the circular cover plate, and through the structural design of the internal thread, the circular cover plate and the driving part, when the device is used, the device is convenient to use. On one hand, the driving part can work to assist the nozzle in spraying operation, the uniformity of a coating is improved, on the other hand, the maintenance convenience is improved, when the driving part breaks down, is damaged and needs to be replaced, a maintainer only needs to take out the circular cover plate from the flow guide cover, the driving part can be overhauled or replaced through simple operation, and the maintenance efficiency is improved. And the maintenance time and cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of nozzles, in particular to a novel thermal spraying nozzle capable of improving coating uniformity. Background Art

[0002] As an important branch in the field of surface engineering, thermal spraying technology sprays molten liquid or solid materials onto the surface of the coated object through high-speed airflow to form a coating with specific functions. This technology is widely used in aerospace, automobile manufacturing, mechanical equipment and other fields, and is of great significance for improving product performance and extending service life. In the existing thermal spraying technology, the design of the nozzle is one of the key factors in coating quality. In order to improve the uniformity of the coating, common practices such as China's authorized utility model patent (Announcement No.: CN219923333U) proposes a nozzle device for robot spraying, which uses a motor to drive the fan blades to rotate, so that the fan blades create a downward airflow, and spray downward through the guide cover to spray auxiliary spray forward, thereby improving the spraying efficiency.

[0003] However, the above device still has some shortcomings when in use: the motor is fixed on the top of the nozzle. When the motor fails or the nozzle is damaged and needs to be replaced, the operation is very inconvenient. Due to the guide cover set on the outside of the nozzle and space limitations, maintenance personnel often need to disassemble the entire nozzle device, which not only increases the maintenance cost, but also prolongs the maintenance time and affects the production efficiency. Therefore, in view of the above situation, a new thermal spray nozzle for improving coating uniformity is proposed. Utility Model Content

[0004] The utility model aims to solve the disadvantage in the prior art that when a motor fails or a nozzle is damaged and needs to be replaced, the replacement operation is very inconvenient, and proposes a new type of thermal spraying nozzle which improves the uniformity of coating.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A novel thermal spraying nozzle for improving coating uniformity comprises a nozzle body, and a flow guide cover is arranged outside the nozzle body.

[0007] A limiting ring is arranged inside the air guide cover, and an air guide component is arranged inside the air guide cover, and the bottom of the air guide component contacts the limiting ring.

[0008] The flow guide component includes a circular cover plate which is threadedly matched with the inner surface of the internal thread. The circular cover plate has three air inlet grooves, each of which is provided with a first filter screen. A driving member is provided at the bottom of the circular cover plate.

[0009] The flow guide assembly includes a retaining ring in contact with the limiting ring, four short rods are arranged at the bottom of the circular cover plate, the bottoms of the four short rods are all plugged into the retaining ring, and a second filter screen covering the inner circle is arranged on the retaining ring.

[0010] Preferably, the nozzle body comprises a nozzle, a pair of support rods are arranged outside the nozzle, and one end of the pair of support rods away from the nozzle is fixedly connected to the inner surface of the deflector.

[0011] Preferably, the nozzle body further comprises a connecting pipe communicated with the nozzle, and the connecting pipe passes through the support rod and the air guide cover and extends to the outside of the air guide cover.

[0012] Preferably, four insertion holes are provided on the top of the retaining ring, and the four insertion holes cooperate with four short rods.

[0013] Preferably, a handle is provided on the top of the circular cover plate, and an external thread is provided on the surface of the circular cover plate.

[0014] Preferably, the interior of the air guide cover is provided with an internal thread matching the external thread.

[0015] The utility model has the following beneficial effects:

[0016] 1. The utility model adopts the structural design of internal thread, circular cover plate and driving part. When using the device, on the one hand, the auxiliary nozzle of the driving part can be used for spraying operation, which improves the uniformity of the coating. On the other hand, it improves the convenience of maintenance. When the driving part fails and needs to be replaced, the maintenance personnel only need to remove the circular cover plate from the air guide cover. The driving part can be repaired or replaced through simple operations, which reduces the maintenance time and cost.

[0017] 2. The utility model uses the structural design of the first filter, the baffle ring and the second filter. When the driving part is working, the air entering the air guide cover and the gas blown out by the driving part can be filtered. Through two filtering processes, impurities and particulate matter can be effectively reduced to ensure the purity of the spraying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a new thermal spray nozzle;

[0019] Figure 2 A schematic diagram of the structure of the connection between the air guide cover and the air guide assembly;

[0020] Figure 3 It is a schematic diagram of the structure of the air deflector;

[0021] Figure 4 is a structural schematic diagram of a flow guide component;

[0022] Figure 5 It is a schematic diagram of the structure of the nozzle body.

[0023] In the figure: 1. nozzle body; 101. nozzle; 102. support rod; 103. connecting pipe; 2. guide cover; 201. internal thread; 202. limit ring; 3. guide assembly; 301. circular cover plate; 302. first filter; 303. driving member; 304. short rod; 305. retaining ring; 306. socket; 307. second filter. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Reference Figure 1-5 A novel thermal spray nozzle for improving coating uniformity includes a nozzle body 1, a guide cover 2 is arranged outside the nozzle body 1, a hollow hole is opened through the guide cover 2, and the hollow hole cooperates with a connecting pipe 103, such as Figure 1 , Figure 2 and Figure 4 As shown, the nozzle body 1 includes a nozzle 101, and a pair of support rods 102 are arranged outside the nozzle 101. The ends of the pair of support rods 102 away from the nozzle 101 are fixedly connected to the inner surface of the guide cover 2. The nozzle body 1 also includes a connecting pipe 103 connected to the nozzle 101. The connecting pipe 103 passes through the support rods 102 and the guide cover 2 and extends to the outside of the guide cover 2. The connecting pipe 103 is connected to the material delivery pipe of the paint. The connecting pipe 103 is used to introduce the raw material into the nozzle 101 and spray it downward through the nozzle 101.

[0026] A limit ring 202 is arranged inside the air deflector 2 . An internal thread 201 matching with the external thread is arranged inside the air deflector 2 . A flow guide assembly 3 is arranged inside the air deflector 2 . The bottom of the flow guide assembly 3 contacts the limit ring 202 .

[0027] The guide assembly 3 includes a circular cover plate 301 which is threadedly matched with the inner surface of the internal thread 201, a handle is provided on the top of the circular cover plate 301, an external thread is provided on the surface of the circular cover plate 301, the circular cover plate 301 has three air inlet grooves, and a first filter screen 302 is provided on each of the three air inlet grooves, and a driving member 303 is provided at the bottom of the circular cover plate 301. Furthermore, the driving member 303 includes a motor fixed at the bottom center of the circular cover plate 301 by bolts and a fan blade connected to the output end of the motor.

[0028] The guide assembly 3 includes a retaining ring 305 in contact with the limiting ring 202. Four short rods 304 are arranged at the bottom of the circular cover plate 301. The bottoms of the four short rods 304 are all plugged into the retaining ring 305. Figure 4As shown, four insertion holes 306 are provided on the top of the retaining ring 305, and the four insertion holes 306 cooperate with the four short rods 304. When the driving member 303 needs to be inspected or replaced, the circular cover 301 is first rotated by the handle to remove the circular cover 301 from the air duct 2, and then the retaining ring 305 is pulled off the four short rods 304. After the circular cover 301 is turned upside down, the driving member 303 at the bottom of the circular cover 301 can be inspected or replaced. The inspection or replacement of the driving member 303 can be completed through simple operations, reducing maintenance time and cost.

[0029] A second filter 307 covering the inner circle is provided on the retaining ring 305. When the driving member 303 is working, the air entering into the air guide cover 2 and the gas blown out by the driving member 303 can be filtered. Through two filtering processes, impurities and particulate matter can be effectively reduced to ensure the purity during the spraying process.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A novel thermal spray nozzle for improving coating uniformity, comprising a nozzle body (1), wherein a flow guide cover (2) is arranged outside the nozzle body (1), and characterized in that: A limiting ring (202) is arranged inside the air guide cover (2), a flow guide component (3) is arranged inside the air guide cover (2), and the bottom of the flow guide component (3) is in contact with the limiting ring (202); The flow guide assembly (3) comprises a circular cover plate (301) threadably matched with the inner surface of the internal thread (201), the circular cover plate (301) having three air inlet grooves, each of which is provided with a first filter screen (302), and a driving member (303) is provided at the bottom of the circular cover plate (301); The flow guide assembly (3) comprises a retaining ring (305) in contact with the limiting ring (202); four short rods (304) are arranged at the bottom of the circular cover plate (301); the bottoms of the four short rods (304) are all plugged into the retaining ring (305); and a second filter screen (307) covering the inner circle is arranged on the retaining ring (305).

2. A novel thermal spray nozzle for improving coating uniformity according to claim 1, characterized in that: The nozzle body (1) comprises a nozzle (101), a pair of support rods (102) being arranged outside the nozzle (101), and one end of the pair of support rods (102) away from the nozzle (101) being fixedly connected to the inner surface of the deflector (2).

3. A novel thermal spray nozzle for improving coating uniformity according to claim 2, characterized in that: The nozzle body (1) further comprises a connecting pipe (103) connected to the nozzle (101); the connecting pipe (103) passes through the support rod (102) and the air guide cover (2) and then extends to the outside of the air guide cover (2).

4. A novel thermal spray nozzle for improving coating uniformity according to claim 1, characterized in that: The top of the retaining ring (305) is provided with four insertion holes (306), and the four insertion holes (306) cooperate with four short rods (304).

5. A novel thermal spray nozzle for improving coating uniformity according to claim 1, characterized in that: A handle is provided on the top of the circular cover plate (301), and an external thread is provided on the surface of the circular cover plate (301).

6. A novel thermal spray nozzle for improving coating uniformity according to claim 1 or 5, characterized in that: The interior of the air guide cover (2) is provided with an internal thread (201) that matches the external thread.

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