A wide plasma direct injection device

Abstract

The utility model discloses a wide plasma direct -spraying device relates to the field of plasma processing technology, including the nozzle, the bottom one side of nozzle is installed with the side plate, and the side plate is installed with the electrode mounting seat on the side close to the nozzle, and the electrode mounting seat is opened with a plurality of electrode mounting holes, and one electrode is installed to each electrode mounting hole, and the one side outer wall of nozzle is installed with two side plates, and the front cover plate is sealedly connected with the back cover plate through two side plates, and the bottom of back cover plate is installed with the back air inlet plate, in the utility model, through the power on-off control of single electrode, can quickly adjust the width that plasma is spouted to the spray gun, has improved the flexibility and adaptability of equipment, so that the user need not to replace the spray head of different size, can easily cope with the base material processing demand of different width, has improved work efficiency and operation convenience, has solved the problem of low efficiency, slow speed and possible not comprehensive treatment in place when processing fast -moving large -area base material.

Description

Technical Field

[0001] This utility model relates to the field of plasma treatment technology, specifically a wide-width direct plasma injection device. Background Technology

[0002] Plasma, also known as the plasma state, is the fourth state of matter. Its unique physical and chemical properties have opened up vast application possibilities for human technological development. Compared to traditional gaseous matter, plasma not only inherits basic properties such as fluidity and diffusivity, but also exhibits electrical conductivity, thermal conductivity, and energy density far exceeding those of conventional matter due to its complex system composed of ions, electrons, and neutral particles.

[0003] In existing technologies, plasma treatment spray guns commonly used in industry and laboratories are basically divided into two types: direct-injection and rotary. Direct-injection plasma spray guns use a single-hole direct spray, with plasma ejected from a fixed nozzle at the spray gun head. During operation, the ejected plasma acts on the substrate surface in a point-like pattern, resulting in a smaller treatment area. Rotary plasma treatment spray guns, on the other hand, have their nozzles rotate around the spray gun's axis, resulting in the ejected plasma acting on the substrate surface in a ring-like pattern. Although the treatment area is larger than that of the direct-injection type, the substrate within the ejected plasma ring is not affected by the plasma and is therefore not treated. When treating moving substrates, the trajectory of the plasma ejected by the direct-injection type on the substrate surface is linear, leading to slow processing speed and low efficiency when treating large areas of moving substrates. The rotary spray gun, when treating moving substrates, uses a rotating nozzle, resulting in a spiral trajectory of the ejected plasma acting on the substrate surface. However, when treating high-speed moving substrates, the spiral trajectory of the plasma cannot fully treat the substrate.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The purpose of this invention is to provide a wide-width plasma direct injection device to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides a wide-width plasma direct injection device, including a nozzle, a side plate installed on one side of the bottom end of the nozzle, an electrode mounting seat installed on the side of the side plate near the nozzle, multiple electrodes installed on the inner wall of the electrode mounting seat, two side plates installed on one side of the outer wall of the nozzle, a front cover plate sealed to a rear cover plate through the two side plates, a rear air intake plate installed at the bottom end of the rear cover plate, and a high-speed fan installed on the inner wall of the middle part of the rear air intake plate.

[0007] Furthermore, the nozzle, two front cover plates, two rear cover plates, a rear air intake plate, and two side plates form a complete spray gun housing, and the nozzle, front cover plates, rear cover plates, rear air intake plate, and two side plates are all sealed together.

[0008] Furthermore, a spray groove is provided at the top of the nozzle, and the nozzle is connected to the inside of the spray gun housing through the spray groove.

[0009] Furthermore, one side of the electrode mounting base is fixedly connected to two side plates respectively, and the electrode mounting base has mounting holes, through which the electrode mounting base is connected to the electrode.

[0010] Furthermore, a through groove is provided on the inner wall of the rear air intake plate, through which the rear air intake plate is connected to the high-speed fan.

[0011] Furthermore, the rear air intake plate is connected to the interior of the spray gun housing via a high-speed fan (the nozzle and the high-speed fan are perpendicular to each other).

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. By controlling the power supply to a single discharge electrode, the width of the plasma ejected from the spray gun can be quickly adjusted, improving the flexibility and adaptability of the equipment. This allows users to easily meet the needs of substrates with different widths without having to change nozzles of different sizes, thus improving work efficiency and ease of operation.

[0013] 2. It solves the problems of low efficiency, slow speed and possible incomplete treatment when processing large-area substrates that move rapidly. The wide-width jet characteristic ensures that the plasma can uniformly and completely cover the substrate surface, ensuring the stability and consistency of the treatment effect even when processing high-speed moving substrates, thus improving the treatment quality and efficiency. Attached Figure Description

[0014] Figure 1 A schematic diagram showing the overall structure of a wide-width direct plasma injection device; Figure 2 This is a schematic diagram of the overall structure of a wide-width direct plasma injection device. Figure 3 This is a side view diagram of a wide-width direct plasma injection device. Figure 4 This is a schematic diagram of the circuit structure of a wide-width direct plasma injection device.

[0015] In the diagram: 1. Nozzle; 2. Electrode; 3. Electrode mounting base; 4. Front cover plate; 5. Side plate; 6. Rear cover plate; 7. Rear air intake plate; 8. High-speed fan. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-4 This utility model provides a technical solution: a wide-width plasma direct injection device. This wide-width plasma direct injection device mainly includes a nozzle 1. A spray groove is formed at the top of the nozzle 1, and the nozzle 1 is connected to the interior of the spray gun housing through this spray groove. When the device is working, the nozzle 1 itself does not undergo physical movement, but it serves as a channel for plasma ejection. The plasma is ejected through the spray groove at the top of the nozzle 1. Two side plates 5 are installed on one side of the bottom of the nozzle 1. An electrode mounting base 3 is installed on the side of the two side plates 5 near the nozzle 1. Multiple electrodes 2 are installed on the inner wall of the electrode mounting base 3 for generating plasma. The two side plates 5 are connected to the electrode mounting base 3. The electrode mounting base 3 is made of insulating material and is used to support and fix the electrodes 2, as well as for the connection between the spray gun housing and the electrode mounting base. The insulation between the two electrodes 2, together with the two front cover plates 4 and the two rear cover plates 6, constitutes the spray gun housing, ensuring the airtightness of the device. Two side plates 5 are installed on one side of the outer wall of the nozzle 1. The two front cover plates 4 are sealed to the two rear cover plates 6 through these two side plates 5, forming a complete spray gun housing structure. The bottom of the two rear cover plates 6 is equipped with a rear air intake plate 7. A high-speed fan 8 is installed on the inner wall of the middle part of the rear air intake plate 7 to introduce airflow to assist the plasma ejection. The nozzle 1, the two front cover plates 4, the two rear cover plates 6, the rear air intake plate 7 and the two side plates 5 together constitute a complete spray gun housing. All components are sealed to ensure that no gas leakage occurs during the operation of the device and to ensure stable plasma ejection.

[0018] See Figure 1 , Figure 4When a high-frequency, high-voltage electric current is applied to the electrode, the working gas ionizes under the influence of the electric field. The atoms or molecules in the gas are excited and release electrons, forming positively charged ions and negatively charged electrons. These ions and electrons mix together to form plasma. The nozzle 1 forms a plasma jet channel, and the plasma is directly sprayed onto the surface of the material to be treated through the nozzle 1. Each electrode 2 is individually connected to a transformer, and the same input terminals of each transformer are connected together to the output terminal of the drive power supply to ensure that the output frequency and current direction of each transformer are the same, thereby generating a stable plasma. One of the same output terminals of each transformer is connected to one electrode 2, and the other same output terminal is connected in parallel to the spray gun housing. The transformer transforms the input voltage and outputs a high-frequency voltage suitable for generating plasma to the electrode 2.

[0019] See Figure 1 , Figure 2 The nozzle 1 has a spray groove at its top end. The nozzle 1 is connected to the inside of the spray gun housing through the spray groove. The nozzle 1 is triangular in shape and the spray groove is rectangular in shape. As the outlet for plasma ejection, the triangular shape of the nozzle 1 and the rectangular shape of the spray groove have a direct impact on the ejection shape and efficiency of the plasma, thereby improving the ejection efficiency of the plasma and the uniformity of the coating, resulting in a more ideal coating effect.

[0020] See Figure 1 The electrode mounting base 3 has an internal mounting hole, which is connected to the electrode 2. The inner wall of the side plate 5 has a slot, and both ends of the electrode mounting base 3 are fixedly connected to the side plate 5 through the slot. The side plate 5 has a through groove for the high-voltage power line to enter the spray gun and connect to the electrode 2.

[0021] See Figure 1The rear air intake plate 7 is connected to the interior of the spray gun housing via a high-speed fan 8. The nozzle 1 and the high-speed fan 8 are perpendicular to each other. The rear air intake plate 7 is installed at the bottom of the front cover plate 4 and is part of the spray gun housing. It serves to introduce airflow. The rear air intake plate 7 itself does not move physically, but it is the channel for airflow to enter the interior of the spray gun housing. It provides a mounting position for the high-speed fan 8 and connects to the interior of the spray gun housing through the high-speed fan 8 to introduce airflow. The design of the rear air intake plate 7 ensures that the airflow can smoothly enter the interior of the spray gun housing, providing the necessary airflow assistance for the plasma ejection and improving the spraying effect. When the device is working, the high-speed fan 8 rotates to generate airflow, which is introduced into the interior of the spray gun housing. The high-speed fan 8 generates airflow by rotating. After these airflows enter the interior of the spray gun housing, they assist the plasma to be ejected from the nozzle 1, improving the spraying efficiency and coverage. The perpendicularity of the two positions ensures that the airflow can act evenly on the plasma, improving the plasma ejection efficiency and stability. At the same time, this design also helps to form a wide plasma beam, improving the coverage and uniformity of the spraying.

[0022] Working principle: Electrode 2 serves as the cathode. The spray gun housing, composed of nozzle 1, front cover plate 4, side plate 5, rear cover plate 6, and rear air intake plate 7, has its inner wall serving as the anode. High-frequency, high-voltage conditions are applied to the cathode and anode. When the working gas flows through them, under the influence of the electric field, the initial electrons in the working gas (a small number of electrons generated by cosmic rays or field emission) are accelerated. These accelerated electrons gain kinetic energy and collide with neutral gas particles. When the kinetic energy of the electron exceeds the ionization energy of the gas, the collision causes the neutral particles to ionize, producing a new free electron and a positive ion. The newly generated electrons are accelerated by the electric field, continuing to collide with and ionize other neutral particles, triggering an electron avalanche effect and rapidly generating a large amount of plasma. Nozzle 1 serves as the channel for plasma ejection, with a rectangular spray groove at its top connected to the inside of the spray gun housing. After plasma is generated, it is directly sprayed onto the surface of the material to be treated through the spray groove of nozzle 1. Through physical and chemical reactions, the surface of the material is modified. Each electrode 2 is individually connected to a transformer, and the same input terminals of each transformer are connected in parallel to the output terminal of the drive power supply, ensuring that the output frequency and current direction of each transformer are the same, thereby generating stable plasma. The transformer converts the input voltage into a high-frequency voltage suitable for plasma generation and outputs it to electrode 2. The high-speed fan 8 rotates to generate airflow, which is introduced into the inside of the spray gun housing to assist the plasma in being ejected from electrode 2 to nozzle 1, improving spraying efficiency and coverage. The nozzle 1 and the high-speed fan 8 are perpendicular to each other, ensuring that the airflow acts uniformly on the plasma, improving plasma ejection efficiency and stability, forming a wide plasma beam, and improving the spraying coverage and uniformity.

[0023] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art, which is common knowledge in the field. Furthermore, since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A wide-width plasma direct injection device, comprising a nozzle (1), characterized in that: A side plate (5) is installed on one side of the bottom end of the nozzle (1). An electrode mounting seat (3) is installed on the side of the side plate (5) near the nozzle (1). Multiple electrodes (2) are installed on the inner wall of the electrode mounting seat (3). Two side plates (5) are installed on the outer wall of one side of the nozzle (1). The two side plates (5) are sealed and connected to a front cover plate (4) and a rear cover plate (6). A rear air intake plate (7) is installed at the bottom end of the rear cover plate (6). A high-speed fan (8) is installed on the inner wall of the middle part of the rear air intake plate (7).

2. The wide-width direct plasma injection device as described in claim 1, characterized in that: The nozzle (1), front cover plate (4), rear cover plate (6), rear air intake plate (7) and two side plates (5) form a complete spray gun housing. The nozzle (1), two front cover plates (4), two rear cover plates (6), rear air intake plate (7) and two side plates (5) are all sealed together.

3. A wide-width direct plasma injection device as described in claim 2, characterized in that: The nozzle (1) has a spray groove at its top end, and the nozzle (1) is connected to the inside of the spray gun housing through the spray groove.

4. A wide-width direct plasma injection device as described in claim 3, characterized in that: The outer wall of one side of the electrode mounting base (3) is fixedly connected to two side plates (5). The electrode mounting base (3) has mounting holes inside, and the electrode mounting base (3) is connected to the electrode (2) through the mounting holes.

5. A wide-width direct plasma injection device as described in claim 4, characterized in that: The rear air intake plate (7) has a through groove on its inner wall, and the rear air intake plate (7) is connected to the high-speed fan (8) through the through groove.

6. A wide-width direct plasma injection device as described in claim 5, characterized in that: The rear air intake plate (7) is connected to the interior of the spray gun housing via a high-speed fan (8), and the nozzle (1) and the high-speed fan (8) are perpendicular to each other.

7. A wide-width direct plasma injection device as described in claim 6, characterized in that: The nozzle (1) is triangular in shape, and the spray groove is rectangular in shape.

Images