Airflow mixing coating nozzle

Abstract

The utility model discloses an airflow mixing coating nozzle, relates to the field of powder conveying and mixing, and aims to solve the problem that a valve rod in a traditional nozzle is complex in internal structure and inconvenient to integrally process. The nozzle seat is provided with a liquid material inlet; one end of the nozzle cap is hermetically connected with the nozzle seat; a compressed air channel is formed in the nozzle seat and the nozzle cap; the nozzle core is sleeved in the nozzle cap and is provided with a central spraying hole and a radial channel which are communicated with each other; a valve rod with a center channel is arranged in the nozzle seat in a sleeved mode, the valve rod and the nozzle core are sealed through a sealing ring, the valve rod and the inner wall of the nozzle seat are sealed through a sealing ring, a liquid material channel used for leading in a liquid coating agent is defined between the valve rod and the nozzle seat, and a liquid material channel used for leading in a liquid coating agent is defined between the nozzle core and the nozzle cap, and the liquid material inlet and the radial channel are both communicated with the liquid material channel. The central spraying hole is communicated with the central channel to form a gas channel for introducing carrier gas and is communicated with the compressed air channel, the gas channel is separated from the liquid material channel, and the central spraying hole is used for mixing the liquid coating agent and the carrier gas and spraying the coating particles.

Description

TECHNICAL FIELD

[0001] The utility model relates to powder conveying and mixing field, concretely relates to a gas flow mixing coating nozzle. BACKGROUND

[0002] At present, in the gas flow mixing coating work, the valve body in the traditional nozzle is one-piece structure, in order to ensure that the gas and liquid in the nozzle do not intercommunicate in the working process, the machining precision of the nozzle is required to be higher, the material selection is limited, and multiple flow channel holes exist in the valve body of the traditional nozzle, the structure processing is more complex, and there are problems of inconvenient machining and installation. UTILITY MODEL CONTENTS

[0003] The utility model discloses a gas flow mixing coating nozzle to facilitate the split machining and installation of the nozzle.

[0004] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: a gas flow mixing coating nozzle, comprising:

[0005] The nozzle seat is provided with a liquid inlet on the wall.

[0006] The nozzle cap is sealingly connected to one end of the nozzle seat, and the inside of the nozzle seat and the nozzle cap forms a pressure air channel.

[0007] The nozzle core is sleeved in the nozzle cap, and the nozzle core has a central nozzle hole and a radial channel, and the radial channel is communicated with the central nozzle hole.

[0008] The valve rod is sleeved in the nozzle seat, and the valve rod has a central channel, and the valve rod and the nozzle core and the inner wall of the nozzle seat are all sealed by a sealing ring, and the valve rod and the nozzle seat and the nozzle core and the nozzle cap all enclose a liquid channel, and the liquid inlet and the radial channel are communicated with the liquid channel, and the central nozzle hole of the nozzle core and the central channel of the valve rod are communicated to form a gas channel, and the gas channel is communicated with the pressure air channel, and the gas channel is blocked from the liquid channel, the liquid channel is used for passing in the liquid coating agent, the gas channel is used for passing in the carrier gas, and the central nozzle hole is used for mixing the liquid coating agent and the carrier gas and spraying out the nanometer coating particles.

[0009] Optionally, in the above-mentioned gas flow mixing coating nozzle, the material of the nozzle core is ceramic.

[0010] Optionally, in the above-mentioned gas flow mixing coating nozzle, the sealing ring comprises a U-shaped sealing ring.

[0011] Optionally, in the gas flow mixing coating nozzle, the center nozzle hole has a first variable diameter section and a second variable diameter section, the first variable diameter section and the second variable diameter section are both trapezoidal in cross-sectional shape along the axial direction of the center nozzle hole, and the small-diameter end of the first variable diameter section and the small-diameter end of the second variable diameter section are correspondingly connected, the large-diameter end of the first variable diameter section is used to communicate with the center channel of the valve stem, and the large-diameter end of the second variable diameter section is used to spray the nanoscale coating particles.

[0012] Optionally, in the gas flow mixing coating nozzle, a plurality of radial channels are arranged, and the plurality of radial channels are distributed in the circumferential direction at the first variable diameter section.

[0013] Optionally, in the gas flow mixing coating nozzle, the radial channels are arranged in 2-8.

[0014] Optionally, in the gas flow mixing coating nozzle, the nozzle seat and the nozzle cap are threadedly connected.

[0015] Optionally, in the gas flow mixing coating nozzle, the liquid material channel comprises:

[0016] The temporary storage cavity is in communication with the liquid material inlet and is located between the nozzle seat and the valve stem, and the temporary storage cavity is used to temporarily store the liquid coating agent;

[0017] The flow cavity is in communication with the temporary storage cavity and the radial channel, respectively, and the flow cross-sectional area of the temporary storage cavity is greater than the flow cross-sectional area of the flow cavity.

[0018] Compared with the prior art, when the above technical solution is adopted, the carrier gas flows through the pressure air channel from one end of the nozzle seat to the gas channel, and the liquid coating agent is introduced into the liquid material inlet at the same time, so that the liquid coating agent flows through the liquid material channel and the radial channel in sequence and then enters the center nozzle hole, and the liquid coating agent and the high-speed carrier gas are impacted and mixed at the center nozzle hole close to the nozzle core of the gas channel, the liquid coating agent forms nanoscale coating particles, and the nanoscale coating particles are sprayed, so that the sprayed nanoscale coating particles can form a coating agent gas flow. Compared with the traditional nozzle valve body which adopts an integrated structure, the nozzle of the present application comprises a split nozzle core, a valve stem, a nozzle seat and a nozzle cap. By splitting the nozzle core and the valve stem for machining, the flow holes inside the valve body and the nozzle core can be machined separately, which makes the structure machining simpler and facilitates installation. The inner walls between the valve stem and the nozzle core and between the valve stem and the nozzle seat are both sealed by sealing rings, so that the gas channel and the liquid material channel at the joint surface are blocked, the gas and the liquid material do not affect each other, the sealing between the gas channel and the liquid material channel is good, and the risk of transmission through the gap at the joint surface is reduced. When the gas pressure is higher than the liquid pressure, the liquid can be smoothly sprayed without being affected by the gas pressure. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0020] Figure 1 A structure schematic view of the airflow mixing coating nozzle provided in the embodiments of the present application;

[0021] Figure 2 A structure schematic view of the airflow mixing coating nozzle provided in the embodiments of the present application; Figure 1 A local structure enlarged view of A in the middle.

[0022] Reference signs:

[0023] 1-nozzle seat; 11-press air channel; 12-liquid material inlet; 2-nozzle cap; 3-nozzle core; 31-central nozzle hole; 311-first variable diameter section; 312-second variable diameter section; 32-radial channel; 4-valve rod; 41-central channel; 5-sealing ring; 6-liquid material channel; 61-temporary storage cavity; 62-flow cavity. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] In addition, the terms "first", "second", etc. are only used for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more than two, unless otherwise explicitly and specifically limited. The meaning of "several" is one or more than one, unless otherwise explicitly and specifically limited.

[0027] In the description of the utility model, it needs to be understood that the orientation or position relation indicated by the terms "upper", "lower", "front", "rear", "left", "right" and the like is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0028] In the description of the utility model, it needs to be understood that the terms "mounting", "connection" and "connection" should be understood in a broad sense unless otherwise specified and limited, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0029] As shown in Figure 1 and Figure 2 The utility model discloses a kind of airflow mixing coating nozzles, including: nozzle seat 1, nozzle cap 2, nozzle core 3, valve stem 4 and sealing ring 5.

[0030] Wherein, liquid inlet 12 is set on the wall of nozzle seat 1;Nozzle cap 2 one end is sealedly connected with nozzle seat 1, and the inside of nozzle seat 1 and nozzle cap 2 forms pressure air passage 11;Nozzle core 3 is sleeved in nozzle cap 2, nozzle core 3 has center jet hole 31 and radial passage 32, radial passage 32 is communicated with center jet hole 31;Valve stem 4 is sleeved in nozzle seat 1 and part nozzle cap 2, valve stem 4 has center passage 41, valve stem 4 and nozzle core 3 between and valve stem 4 and the inner wall of nozzle seat 1 between are sealed by sealing ring 5, valve stem 4 and nozzle seat 1 between and nozzle core 3 and nozzle seat 1 between are all enclosed one liquid material passage 6, liquid inlet 12 and radial passage 32 are all communicated with liquid material passage 6, center jet hole 31 of nozzle core 3 and center passage 41 of valve stem 4 are communicated to form a gas passage, the gas passage is communicated with pressure air passage 11, and the gas passage is blocked with liquid material passage, liquid material passage 6 is used for passing into liquid coating agent, the gas passage is used for passing into carrier gas, center jet hole 31 is used for mixing liquid coating agent and carrier gas and spraying out nanometer coating particles, and nanometer coating particles are liquid particles.

[0031] Specific implementation, as Figure 1As shown, the carrier gas flows through the compressed air channel 11 from one end of the nozzle seat 1 to the gas channel, and the liquid coating agent is introduced at the liquid inlet 12, so that the liquid coating agent flows through the liquid channel 6 and the radial channel 32 in turn and enters the central spray hole 31, and the liquid coating agent and the high-speed carrier gas flow are mixed by impacting at the central spray hole 31 of the gas channel close to the nozzle core 3, the liquid coating agent forms nanoscale coated particles, and nanoscale coated particles are sprayed, so that the nanoscale coated particles can form a coating agent gas flow. Compared with the traditional nozzle valve body using an integrated structure, the nozzle of the present application includes a nozzle seat 1, a nozzle cap 2, a nozzle core 3 and a valve stem 4. By separately processing the nozzle core 3 and the valve stem 4, the flow channel holes inside the valve body 2 and the nozzle core 3 can be machined separately, making the structure easier to process and easier to install. The inner walls between the valve stem 4 and the nozzle core 3 and between the valve stem 4 and the nozzle seat 1 are sealed by the sealing ring 5, so that the gas channel and the liquid channel 6 at the joint surface are blocked, the gas and the liquid do not affect each other, and the valve stem 4 and the nozzle core 3 are easy to process and install. At the same time, the gas channel and the liquid channel 6 are well sealed, reducing the risk of transmission through the gap at the joint surface. When the gas pressure is higher than the liquid pressure, the liquid can be smoothly sprayed without being affected by the gas pressure.

[0032] Specifically, in this embodiment, the material of the nozzle core 3 is ceramic. Compared with the traditional way of using metal material for the nozzle core 3, the material of the nozzle core 3 in this application is ceramic, which has the advantages of good wear resistance, high temperature resistance and corrosion resistance, greatly improving the wear resistance of the nozzle core 3 structure, and avoiding the generation of cavitation damage and metal impurities at the nozzle core 3. Of course, the nozzle core 3 can also use other wear-resistant and corrosion-resistant materials to prolong the service life of the gas flow mixing and coating nozzle.

[0033] Specifically, in this embodiment, the sealing ring 5 includes a U-shaped sealing ring, the cross section of the U-shaped sealing ring has a circular part and a rectangular part, the circular part is located at the outer circle of the sealing ring 5, and the rectangular part is located at the inner circle of the sealing ring 5. The rectangular part and the circular part can use two different materials of sealing material, the rectangular part has a groove, and part of the circular part is embedded in the groove. This U-shaped sealing ring is a special sealing ring for blocking liquid and high-pressure gas, which has good sealing effect. The U-shaped sealing ring can tightly fit the sealing surface when compressed, achieving good sealing effect. Of course, the sealing ring 5 can also use sealing structures with other cross-sectional shapes to effectively prevent leakage of fluid or gas at the sealing surface, providing good sealing effect for the joint surface between the nozzle core 3 and the valve stem 4 and the sealing connection between the valve stem 4 and the nozzle seat 1, to ensure the blocking of the gas channel and the liquid channel 6, so that the gas and the liquid do not affect each other.

[0034] As Figure 1As shown, specifically, in the present embodiment, the center jet hole 31 has a first variable diameter section 311 and a second variable diameter section 312, both of which have a trapezoidal cross-sectional shape along the axial direction of the center jet hole 31, and the small-diameter end of the first variable diameter section 311 and the small-diameter end of the second variable diameter section 312 are correspondingly connected, the large-diameter end of the first variable diameter section 311 is used to communicate with the center channel 41 of the valve stem 4, and the large-diameter end of the second variable diameter section 312 is used to spray out the nanoscale coated particles. In this way, during the spraying of the liquid from the center jet hole 31, the liquid first passes through the first variable diameter section 311, at which time the cross-sectional area of the liquid channel 6 gradually decreases to the corresponding connection between the first variable diameter section 311 and the second variable diameter section 312, and then passes through the second variable diameter section 312, at which time the cross-sectional area of the liquid channel 6 gradually increases to the spraying end of the center jet hole 31, i.e. the liquid in the center jet hole 31 experiences a gradual decrease in cross-sectional area and then a gradual increase in cross-sectional area and is sprayed out, so that the liquid can accumulate energy at the small-diameter end of the corresponding connection between the first variable diameter section 311 and the second variable diameter section 312, and form a larger spraying height at the spraying end of the center jet hole 31, so as to ensure that the nanoscale coated particles sprayed out of the gas flow mixing coating nozzle can be fully mixed with the powder to be coated, thereby improving the spraying efficiency of the gas flow mixing coating nozzle.

[0035] As shown in the drawings, Figure 1 Specifically, in the present embodiment, a plurality of radial channels 32 are provided, and the plurality of radial channels 32 are spaced apart in the circumferential direction at the first variable diameter section 311. Among them, the radial channels 32 can be spaced apart in the circumferential direction at the first variable diameter section 311 by 2, 3, 5, 8, etc. In this way, the number and hole diameter of the radial channels 32 can be adjusted according to the required spraying flow of nanoscale coated particles in actual gas flow coating work, thereby improving the use flexibility of the gas flow mixing coating nozzle.

[0036] In other embodiments, the nozzle seat 1 and the nozzle cap 2 are threadedly connected. In this way, it is convenient to install and dismount the nozzle seat 1 and the nozzle cap 2 and the internal structural components therebetween.

[0037] As shown in the drawings, Figure 1As shown, specifically, in the present embodiment, the liquid material passage 6 comprises a temporary storage cavity 61 and a flow cavity 62, the temporary storage cavity 61 is in communication with the liquid material inlet 12, the temporary storage cavity 61 is surrounded by the nozzle seat 1 and the valve stem 4 to form an annular cavity, and the temporary storage cavity 61 is used for temporarily storing the liquid coating agent; the flow cavity 62 is surrounded by the nozzle cap 2 and the nozzle core 3 to form an annular cavity, the flow cavity 62 is in communication with the temporary storage cavity 61 and the radial passage 32 respectively, and the flow cross-sectional area of the temporary storage cavity 61 is greater than that of the flow cavity 62. In this way, the liquid coating agent is first introduced into the temporary storage cavity 61 through the liquid material inlet 12 to temporarily store the liquid coating agent, and then enters the flow cavity 62, and the temporary storage cavity 61 is used to ensure the accuracy and stability of the flow and flow rate of the liquid coating agent, so as to ensure the uniformity and stability of the liquid coating agent flowing into the center jet hole 31 and spraying the coated particles.

[0038] In the description of the above-described embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An air flow mixing wrap nozzle characterized by, The application relates to a nozzle for spraying nano-sized coated particles, which comprises the following parts: a nozzle seat, the wall of which is provided with a liquid inlet; a nozzle cap, one end of which is in sealing connection with the nozzle seat, and the inside of the nozzle seat and the nozzle cap forms a compressed air channel; a nozzle core, which is sleeved in the nozzle cap, and has a central nozzle hole and a radial channel, the radial channel being in communication with the central nozzle hole; a valve rod, which is sleeved in the nozzle seat, and has a central channel, the valve rod and the nozzle core being sealed by a sealing ring, and the valve rod and the nozzle seat being sealed by a sealing ring, a liquid channel being formed between the valve rod and the nozzle seat and between the nozzle core and the nozzle cap, the liquid inlet and the radial channel being in communication with the liquid channel, the central nozzle hole of the nozzle core being in communication with the central channel of the valve rod to form a gas channel, the gas channel being in communication with the compressed air channel and being blocked from the liquid channel, the liquid channel being used for feeding liquid coating agent, the gas channel being used for feeding carrier gas, and the central nozzle hole being used for mixing the liquid coating agent and the carrier gas and spraying nano-sized coated particles.

2. The airflow mixing coater nozzle of claim 1, wherein, The nozzle core is made of ceramic.

3. The airflow mixing coater nozzle of claim 1, wherein, The sealing ring comprises a U-shaped sealing ring.

4. The airflow mixing coater nozzle of claim 1, wherein, The central nozzle hole has a first variable-diameter section and a second variable-diameter section, the first variable-diameter section and the second variable-diameter section both being in the shape of a trapezoid in the axial cross section of the central nozzle hole, and the small-diameter end of the first variable-diameter section being connected with the small-diameter end of the second variable-diameter section, the large-diameter end of the first variable-diameter section being used for being in communication with the central channel of the valve rod, and the large-diameter end of the second variable-diameter section being used for spraying the nano-sized coated particles.

5. The airflow mixing coater nozzle of claim 4, wherein, The radial channel is provided with a plurality of radial channels, which are distributed along the circumferential direction at the first variable-diameter section.

6. The airflow mixing coater nozzle of claim 5, wherein, The radial channel is provided with 2-8 radial channels.

7. The airflow mixing coater nozzle of claim 1, wherein, The nozzle seat and the nozzle cap are in screw connection.

8. The airflow mixing coater nozzle of claim 1, wherein, The liquid channel comprises: a temporary storage cavity, which is in communication with the liquid inlet, is located between the nozzle seat and the valve rod, and is used for temporarily storing the liquid coating agent; a flow cavity, which is in communication with the temporary storage cavity and the radial channel respectively, and the flow cross-sectional area of the temporary storage cavity is larger than that of the flow cavity.

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