Nozzle and powder spraying device

Abstract

The invention discloses a nozzle and a powder spraying device, and relates to the technical field of photovoltaic glass production. The nozzle comprises a body, a feeding flow channel, a diffusion flow channel and a discharging flow channel which are sequentially communicated are arranged in the body, the inner diameter of the diffusion flow channel is larger than that of the feeding flow channel and that of the discharging flow channel, a first contraction section is arranged in the feeding flow channel, and the inner diameter of the first contraction section is gradually decreased in the first direction from the inlet end to the outlet end of the feeding flow channel. The problems that in the prior art, due to the fact that powder spraying uniformity of a nozzle is poor, a formed glass isolation layer is uneven in thickness and even no powder exists in part of the area, and the isolation and protection effect between glass is affected are solved.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic glass production, and in particular to a nozzle and a powder spraying device. Background Art

[0002] During the production process of photovoltaic glass, in order to prevent the glass from getting moldy during storage and scratches between adjacent glasses during transportation, powder is sprayed between the glasses for isolation and protection.

[0003] In the prior art, powder is sprayed between glasses through a powder sprayer nozzle to form a glass isolation layer. However, the uniformity of the powder spraying by the nozzle is poor, resulting in uneven thickness of the formed glass isolation layer or even no powder in some areas, which affects the isolation and protection effect between the glasses.

[0004] Therefore, the above problems need to be solved urgently. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a nozzle and a powder spraying device to solve the problem in the prior art that the uniformity of the nozzle powder spraying is poor, resulting in uneven thickness of the formed glass isolation layer or even no powder in some areas, affecting the isolation and protection effect between the glasses.

[0006] In order to solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0007] The first aspect of the present application provides a nozzle, comprising:

[0008] The main body has a feed channel, a diffusion channel and a discharge channel connected in sequence, the inner diameter of the diffusion channel is larger than the feed channel and the discharge channel, a first contraction section is arranged in the feed channel, and the inner diameter of the first contraction section decreases along the first direction from the inlet end to the outlet end of the feed channel.

[0009] In some embodiments, the aforementioned nozzle, wherein a first diffusion section is further provided in the feed flow channel, the inlet end of the first diffusion section is connected to and communicated with the outlet end of the first contraction section, and the inner diameter of the first diffusion section increases along a first direction from the inner diameter at the narrowest point equivalent to the first contraction section; the widest inner diameter at the outlet end of the first diffusion section is the same as the widest inner diameter at the inlet end of the first contraction section, and is smaller than the inner diameter of the diffusion flow channel.

[0010] In some embodiments, the aforementioned nozzle further comprises a first transition section in the feed channel, the inner diameter of the first transition section is the same as the narrowest inner diameter of the first contraction section, and the two ends of the first transition section are connected and communicated with the first contraction section and the first diffusion section.

[0011] In some embodiments, the aforementioned nozzle, wherein the discharge flow channel includes a second contraction section and a second diffusion section, the inlet end of the second contraction section is connected to the diffusion flow channel, the inner diameter of the second contraction section decreases along the second direction from the inlet end to the outlet end of the discharge flow channel, the inlet end of the second diffusion section is connected to and connected to the outlet end of the second contraction section, and the inner diameter of the second diffusion section increases along the second direction from the inner diameter at the narrowest point of the second contraction section.

[0012] In some embodiments, the aforementioned nozzle, wherein a second transition section is further provided in the discharge channel, the second transition section comprises a first segment and a second segment connected along the second direction, the first segment is connected to the second contraction segment, and the second segment is connected to the second diffusion segment; wherein the inner diameter of the first segment decreases along the second direction from the inner diameter at the narrowest point equivalent to the second contraction segment, and the inner diameter of the second segment increases along the second direction from the inner diameter at the narrowest point equivalent to the first segment to the inner diameter at the narrowest point equal to the second diffusion segment.

[0013] In some embodiments, the aforementioned nozzle has one feed channel and one diffuser channel, which are cylindrical and have their axes coincident with the center line of the body, and four discharge channels which are evenly distributed circumferentially relative to the center line, and all four discharge channels are connected to the diffuser channel.

[0014] In some embodiments, the aforementioned nozzle has a diffusion cone disposed in the diffusion channel, the diffusion cone protrudes toward the outlet end of the feed channel, and the outer edge of the diffusion cone on the side away from the feed channel is close to the center line relative to the discharge channel.

[0015] In some embodiments, the aforementioned nozzle, wherein the body is provided with an opening connected to the diffusion channel, the opening is connected to the outlet end of the one-way valve so that the purge air enters the body through the inlet end of the one-way valve and purges the feed channel, the diffusion channel and the discharge channel.

[0016] In some embodiments, in the aforementioned nozzle, one end of the body where the discharge channel is provided is protruded with a baffle to enclose a powder spraying space, and the outlet end of the discharge channel can spray powder on the glass to be powder-sprayed in the powder spraying space.

[0017] A second aspect of the present application provides a powder spraying device, comprising the above-mentioned nozzle.

[0018] Through the above technical solution, the nozzle and powder spraying device provided by the present application have at least the following advantages:

[0019] The first aspect of the present application provides a nozzle, including a body, wherein the body has a feed flow channel, a diffusion flow channel and a discharge flow channel connected in sequence, the inner diameter of the diffusion flow channel is larger than the feed flow channel and the discharge flow channel, and a first contraction section is arranged in the feed flow channel, and the inner diameter of the first contraction section decreases along the first direction from the inlet end to the outlet end of the feed flow channel. The nozzle of the present application adds a first contraction section in the feed flow channel of the body, so that when the nozzle performs powder spraying operation, compressed air carries powder into the feed flow channel and is transported along the first direction. Since the inner diameter of the first contraction section decreases, the cross-sectional area gradually decreases, so that the flow rate of the compressed air carrying powder passing through the first contraction section increases, and then the flow rate of the compressed air carrying powder when output from the outlet end of the feed flow channel increases, which is conducive to the uniform dispersion of the powder in the compressed air, and then the compressed air and powder entering the subsequent diffusion flow channel have a more uniform and stable flow state, and then it is also ensured that the compressed air and powder output from the diffusion flow channel to the discharge flow channel have good uniformity. Furthermore, the present application can effectively convert the static pressure energy of powder and compressed air into kinetic energy through the acceleration process, thereby making the powder and compressed air flow at high speed in front of the diffusion channel, and the diffusion channel provides a larger space to help the compressed air carrying the powder to effectively convert its kinetic energy back into static pressure energy during the transportation process, thereby reducing energy loss, thereby improving the overall energy conversion efficiency, energy utilization efficiency and powder spraying capacity of the nozzle, thereby avoiding the uneven thickness of the glass isolation layer formed by powder spraying or even the absence of powder in some areas, and ensuring the isolation and protection effect between glasses through powder. Through the application of the present application, the problem of poor uniformity of nozzle powder spraying in the prior art, resulting in uneven thickness of the glass isolation layer or even the absence of powder in some areas, affecting the isolation and protection effect between glasses, is solved.

[0020] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 The schematic diagram of the front cross-sectional structure of a nozzle provided in an embodiment of the present application is shown;

[0023] Figure 2 A schematic diagram of a side cross-sectional structure of a nozzle provided in an embodiment of the present application is shown schematically;

[0024] Figure 3 A schematic diagram of a partial cross-sectional structure of a discharge flow channel of a nozzle provided in an embodiment of the present application is shown;

[0025] Figure 4 The top view structural diagram of a diffusion channel and a discharge channel of a nozzle provided in an embodiment of the present application is schematically shown.

[0026] Description of reference numerals:

[0027] 1. Main body; 11. Feed flow channel; 12. Diffusion flow channel; 13. Discharge flow channel; 14. Opening; 15. One-way valve; 16. Baffle; 111. First contraction section; 112. First diffusion section; 113. First transition section; 121. Diffusion cone; 131. Second contraction section; 132. Second diffusion section; 133. Second transition section; 1331. First segment; 1332. Second segment; 161. Powder spraying space;

[0028] A. First direction; B. Second direction. DETAILED DESCRIPTION

[0029] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0030] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specified, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​described in these embodiments should be interpreted as merely exemplary, rather than as limiting.

[0031] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0032] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0033] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or a component connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific situation. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0034] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0035] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0036] Embodiment 1

[0037] like Figure 1 and Figure 2 As shown, the first aspect of the present application provides a nozzle, including a main body 1, wherein the main body 1 has a feed channel 11, a diffuser channel 12 and a discharge channel 13 connected in sequence, the inner diameter of the diffuser channel 12 is larger than the feed channel 11 and the discharge channel 13, and a first contraction section 111 is arranged in the feed channel 11, and the inner diameter of the first contraction section 111 decreases along a first direction A from the inlet end to the outlet end of the feed channel 11.

[0038] Specifically, the first aspect of the present application provides a nozzle, including a body 1, the specific structural material and shape of the body 1 are not limited, and the powder spraying operation of the glass to be powder sprayed can be achieved through the feed flow channel 11, the diffusion flow channel 12 and the discharge flow channel 13 that are connected in sequence in the body 1. The body 1 can be integrally formed or assembled in parts. When assembled in parts, they can be connected by fasteners, and a sealing ring can be set at the connection position to ensure the tightness of the transportation in the body 1 to avoid leakage. The feed flow channel 11, the diffusion flow channel 12 and the discharge flow channel 13 can be set relative to the center line of the body 1, or the paths of the feed flow channel 11, the diffusion flow channel 12 and the discharge flow channel 13 can be set respectively according to actual needs. There is no specific limit, and the compressed air transported into the body 1 can carry the powder and be output in sequence along the feed flow channel 11, the diffusion flow channel 12 and the discharge flow channel 13 to perform the powder spraying operation.

[0039] The feed channel 11 can be connected to the powder tank outside the nozzle body 1, and a venturi valve can be set on the connecting path. After the compressed air sucks the powder from the powder tank through the venturi valve, it enters the feed channel 11 of the body 1 and starts to be transported. There can be one or more discharge channels 13. Multiple discharge channels 13 can be arranged in an array, or they can be evenly distributed circumferentially relative to the center line of the body 1. The compressed air carries the powder and flows through the feed channel 11 and the diffusion channel 12 in the body 1 in sequence, and can be output from one or more discharge channels 13 to the glass surface to be sprayed to complete the spraying. In the present application, the feed channel 11, the diffusion channel 12 and the discharge channel 13 can be cylindrical, rectangular, polygonal, or other shapes, without limitation. The first contraction section 111 added to the feed channel 11 in the present application can be adaptively adjusted according to the volume shape of the feed channel 11.

[0040] In the present application, the inner diameter of the diffusion channel 12 is larger than the feed channel 11 and the discharge channel 13, so that in the process of compressed air carrying powder entering the diffusion channel 12 from the feed channel 11, the cross-sectional area becomes larger due to the increase in the inner diameter, so that the compressed air carrying powder at the outlet end of the feed channel 11 is gradually decelerated in a larger space, avoiding turbulence caused by sudden changes in fluid velocity. In addition, the larger space provided by the diffusion channel 12 helps to effectively convert the kinetic energy of the compressed air carrying the powder into static pressure energy during the transportation process, reduce energy loss, thereby improving the energy conversion efficiency during the transportation process and ensuring the powder spraying performance and effect of the nozzle. Afterwards, in the process of compressed air carrying powder entering the discharge channel 13 from the diffusion channel 12, the compressed air carrying powder entering the inlet end of the discharge channel 13 is accelerated due to the reduction in the inner diameter and the smaller cross-sectional area, and the pressure at the inlet end of the discharge channel 13 is reduced to suck the compressed air and powder in the diffusion channel 12. The accelerated compressed air carrying powder can overcome the resistance in the subsequent discharge channel 13, thereby improving the conveying kinetic energy. At the same time, the acceleration process is also conducive to the uniform mixing of compressed air and powder, thereby ensuring the powder spraying effect.

[0041] In the present application, a first contraction section 111 is added to the feed channel 11 of the main body 1, so that when the nozzle is performing powder spraying operation, compressed air carrying powder enters the feed channel 11 and is transported along the first direction A. Since the inner diameter of the first contraction section 111 decreases gradually and the cross-sectional area gradually decreases, the flow rate of the compressed air carrying powder passing through the first contraction section 111 increases, and thus the flow rate of the compressed air carrying powder when output from the outlet end of the feed channel 11 increases, which is beneficial to the uniform dispersion of the powder in the compressed air, and thus the compressed air and powder entering the subsequent diffusion channel 12 have a more uniform and stable flow state, and thus also ensure that the compressed air and powder output from the diffusion channel 12 to the discharge channel 13 have good uniformity, thereby avoiding the uneven thickness of the glass isolation layer formed by powder spraying or even the absence of powder in some areas, thereby ensuring the isolation and protection effect between glasses through powder. In terms of energy conversion efficiency, the present application adds a first contraction section 111, which can effectively convert the static pressure energy of powder and compressed air into kinetic energy through the acceleration process, so that the powder and compressed air flow at high speed in front of the diffusion channel 12, and the diffusion channel 12 provides a larger space to help the compressed air carrying the powder to effectively convert its kinetic energy back into static pressure energy during the transportation process, thereby reducing energy loss. Therefore, the present application improves the energy conversion efficiency, energy utilization efficiency and powder spraying ability of the nozzle in practical applications.

[0042] In a first aspect, the present application provides a nozzle, comprising a main body 1, wherein the main body 1 has a feed channel 11, a diffuser channel 12 and a discharge channel 13 connected in sequence, the inner diameter of the diffuser channel 12 is larger than the feed channel 11 and the discharge channel 13, and a first contraction section 111 is provided in the feed channel 11, and the inner diameter of the first contraction section 111 decreases along a first direction A from the inlet end to the outlet end of the feed channel 11. The nozzle of the present application adds a first contraction section 111 in the feed channel 11 of the main body 1, so that when the nozzle is performing powder spraying operation, compressed air carries the powder into the feed channel 11 and is transported along the first direction A. Since the inner diameter of the first contraction section 111 decreases gradually, the cross-sectional area gradually decreases, so that the flow rate of the compressed air carrying the powder passing through the first contraction section 111 increases, and then the flow rate of the compressed air carrying the powder when output from the outlet end of the feed channel 11 increases, which is beneficial to the uniform dispersion of the powder in the compressed air, and then the compressed air and powder entering the subsequent diffusion channel 12 have a more uniform and stable flow state, thereby ensuring that the compressed air and powder output from the diffusion channel 12 to the discharge channel 13 have good uniformity. Furthermore, the present application can effectively convert the static pressure energy of powder and compressed air into kinetic energy through the acceleration process, thereby making the powder and compressed air flow at high speed in front of the diffusion channel 12, and the diffusion channel 12 provides a larger space to help the compressed air carrying the powder to effectively convert its kinetic energy back into static pressure energy during the transportation process, thereby reducing energy loss, thereby improving the overall energy conversion efficiency, energy utilization efficiency and powder spraying capacity of the nozzle, thereby avoiding the uneven thickness of the glass isolation layer formed by powder spraying or even the absence of powder in some areas, and ensuring the isolation and protection effect between glasses through powder. Through the application of the present application, the problem of poor uniformity of nozzle powder spraying in the prior art, resulting in uneven thickness of the glass isolation layer or even the absence of powder in some areas, affecting the isolation and protection effect between glasses, is solved.

[0043] like Figure 1 and Figure 2 As shown, in some embodiments, a first diffusion section 112 is further provided in the feed channel 11, the inlet end of the first diffusion section 112 is connected to and communicated with the outlet end of the first contraction section 111, and the inner diameter of the first diffusion section 112 increases along the first direction A from the inner diameter of the narrowest part of the first contraction section 111; the widest inner diameter of the outlet end of the first diffusion section 112 is the same as the widest inner diameter of the inlet end of the first contraction section 111, and is smaller than the inner diameter of the diffusion channel 12.

[0044] Specifically, the present application connects and communicates with the first diffusion section 112 at the outlet end of the first contraction section 111, so that the powder and the compressed air gradually decelerate after passing through the acceleration stage of the first contraction section 111, so that the powder and the compressed air form a more uniform and stable flow state before entering the diffusion channel 12, reducing the generation of turbulence, and the inner diameter of the first diffusion section 112 increases along the first direction A from the inner diameter of the narrowest part of the first contraction section 111, so that the first diffusion section 112 can provide enough space for the powder and the compressed air to decelerate, and realize the effective conversion of kinetic energy into static pressure energy during the deceleration process, reduce energy loss, and improve the overall working efficiency of the nozzle. And through the increasing inner diameter of the first diffusion section 112, the fluid can better adapt to the larger inner diameter change when entering the diffusion channel 12, reducing the flow instability caused by the sudden expansion of the channel cross section.

[0045] The present application sets the inner diameter of the widest part of the outlet end of the first diffusion section 112 to be the same as the inner diameter of the widest part of the inlet end of the first contraction section 111, and smaller than the inner diameter of the diffusion channel 12, so that the powder and compressed air can maintain consistent flow characteristics after the acceleration of the first contraction section 111 and the deceleration of the first diffusion section 112 during the transportation process of the feed channel 11, thereby improving the continuity and stability of the transmission. In addition, the design of the widest part being consistent can also reduce the pressure fluctuation of the powder and compressed air in the feed channel 11, thereby ensuring the stable and reliable transmission in the nozzle, and ensuring the powder spraying performance and effect of the nozzle.

[0046] like Figure 1 and Figure 2 As shown, in some embodiments, a first transition section 113 is further provided in the feed channel 11, and the inner diameter of the first transition section 113 is the same as the inner diameter of the narrowest part of the first contraction section 111, and the two ends of the first transition section 113 are connected and communicated with the first contraction section 111 and the first diffusion section 112.

[0047] Specifically, in the process of powder and compressed air passing through the first contraction section 111, the inner diameter of the first contraction section 111 decreases, and the cross-sectional area gradually decreases. When reaching the narrowest point of the first contraction section 111, the cross-sectional area is the smallest, and the compressed air carrying the powder is accelerated to the maximum flow rate. In order to make full use of the state in which the compressed air carrying the powder is accelerated to the maximum flow rate, so as to facilitate the uniform dispersion of the powder in the compressed air and make the compressed air and powder entering the subsequent diffusion channel 12 have a more uniform and stable flow state, the present application is provided with a first transition section 113, so as to provide space through the first transition section 113 so that the powder and compressed air can be fully and evenly dispersed at the maximum flow rate.

[0048] like Figure 1 and Figure 2As shown, in some embodiments, the discharge channel 13 includes a second contraction section 131 and a second diffusion section 132, the inlet end of the second contraction section 131 is connected to the diffusion channel 12, the inner diameter of the second contraction section 131 decreases along the second direction B from the inlet end to the outlet end of the discharge channel 13, the inlet end of the second diffusion section 132 is connected to and connected to the outlet end of the second contraction section 131, and the inner diameter of the second diffusion section 132 increases along the second direction B from the inner diameter of the narrowest point of the second contraction section 131.

[0049] Specifically, when the nozzle is performing powder spraying operation, in the process of compressed air carrying powder entering the discharge channel 13 from the diffuser channel 12, since the inlet end of the discharge channel 13 is smaller than the inner diameter of the diffuser channel 12, the cross-sectional area becomes smaller, so that the compressed air carrying powder entering the inlet end of the discharge channel 13 is accelerated, and the pressure at the inlet end of the discharge channel 13 is reduced to suck the compressed air and powder in the diffuser channel 12. On this basis, the present application adds a second contraction section 131 in the discharge channel 13 of the main body 1, so that the inlet end of the discharge channel 13 is accelerated under the suction action and can be further accelerated along the second direction B through the second contraction section 131 with a decreasing inner diameter, thereby facilitating the uniform dispersion of the powder and compressed air in the process of passing through the discharge channel 13, and through the acceleration process, the static pressure energy of the powder and compressed air can be effectively converted into kinetic energy, reducing energy loss, and improving the energy conversion efficiency, energy utilization efficiency and powder spraying ability of the nozzle in practical applications.

[0050] The present application connects and communicates with the second diffusion section 132 at the outlet end of the second contraction section 131, so that the powder and the compressed air gradually decelerate after passing through the acceleration stage of the second contraction section 131, and realizes the effective conversion of kinetic energy into static pressure energy in the deceleration process, thereby reducing energy loss and improving the overall working efficiency of the nozzle, so that the powder and the compressed air form a more uniform and stable flow state before being ejected from the outlet end of the discharge channel 13, reducing the generation of turbulence, and by increasing the inner diameter of the first diffusion section 112, the powder and the compressed air can be more uniform at the outlet end of the discharge channel 13, thereby ensuring the powder spraying effect and the uniformity within the powder spraying coverage range.

[0051] like Figure 1 , Figure 2 and Figure 3As shown, in some embodiments, a second transition section 133 is further provided in the discharge channel 13, and the second transition section 133 includes a first segment 1331 and a second segment 1332 that are connected along the second direction B, the first segment 1331 is connected to the second contraction segment 131, and the second segment 1332 is connected to the second diffusion segment 132; wherein, the inner diameter of the first segment 1331 decreases along the second direction B from the inner diameter of the narrowest point of the second contraction segment 131, and the inner diameter of the second segment 1332 increases along the second direction B from the inner diameter of the narrowest point of the first segment 1331 to the inner diameter of the narrowest point of the second diffusion segment 132.

[0052] Specifically, in order to improve the performance and effect of the nozzle of the present application in spraying powder through the outlet end of the discharge channel 13, a second transition section 133 is further provided in the discharge channel 13 of the present application. The second transition section 133 includes a first segment 1331 and a second segment 1332 connected along the second direction B. The first segment 1331 is connected to the second contraction segment 131, and the second segment 1332 is connected to the second diffusion segment 132. The inner diameter of the first segment 1331 decreases along the second direction B from the inner diameter of the narrowest part of the second contraction segment 131, so that the first segment 1331 further increases the fluid velocity of the powder and compressed air through the gradually decreasing inner diameter, so that the fluid velocity of the powder and compressed air reaches a higher kinetic energy state before entering the second segment 1332 and the second diffusion segment 132. The inner diameter of the second segment 1332 increases, so that the powder and compressed air are gradually decelerated, and the pressure is smoothly restored in the process of gradual deceleration, thereby reducing the generation of turbulence and making the conveying process more stable. Moreover, the setting of the first segment 1331 and the second segment 1332 of the second transition section 133 of the present application plays a role in smooth transition of the fluid transport process between the second contraction section 131 and the second diffusion section 132, optimizes the distribution of powder and compressed air therein, and reduces energy loss, so that the powder and compressed air can be more uniform at the outlet end of the ejection discharge channel 13, thereby ensuring the powder spraying effect and uniformity within the powder spraying coverage range.

[0053] like Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments, the feed channel 11 and the diffuser channel 12 are each one and cylindrical with the axis coinciding with the center line of the body 1 , and there are four discharge channels 13 which are evenly distributed circumferentially relative to the center line, and the four discharge channels 13 are all connected to the diffuser channel 12 .

[0054] Specifically, the present application provides a feed channel 11 and a diffusion channel 12, which are both cylindrical and have their axes coincident with the center line of the main body 1, which helps to smoothly transport the powder and compressed air in the nozzle. The cylindrical shape and the design in which the axes of both coincide with the center line of the main body 1 reduce the turbulence of the fluid during the flow process, avoid the fluid transport disturbance caused by the turning, improve the stability of the transport, reduce energy loss, and improve the energy transmission efficiency.

[0055] The present application is provided with four discharge channels 13 which are evenly distributed circumferentially relative to the center line of the main body 1. The four discharge channels 13 are used to simultaneously perform powder spraying operations on the glass surface to be powder sprayed, thereby ensuring the uniformity and effect of the powder spraying. At the same time, the pressure reduction at the inlet ends of the four discharge channels 13 can simultaneously suck the compressed air and powder in the diffusion channel 12, thereby making the powder spraying operation at the outlet end of the discharge channel 13 more uniform and stable.

[0056] like Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments, a diffusion cone 121 is provided in the diffusion channel 12 , and the diffusion cone 121 protrudes toward the outlet end of the feed channel 11 , and the outer edge of the diffusion cone 121 on one side away from the feed channel 11 is close to the center line relative to the discharge channel 13 .

[0057] Specifically, in order to improve the uniformity of the powder and compressed air entering the diffusion channel 12 from the feed channel 11, the present application further provides a diffusion cone 121 in the diffusion channel 12. The diffusion cone 121 may be in a conical shape, an elliptical cone shape, or a rectangular, hexagonal, or other forms, without limitation. The diffusion cone 121 protrudes toward the outlet end of the feed channel 11, so that the powder and compressed air output from the outlet end of the feed channel 11 collide with each other through its conical surface, thereby improving the uniformity of the distribution of the powder and compressed air, and In the present application, the outer edge of the diffusion cone 121 on one side facing away from the feed channel 11 is close to the center line of the discharge channel 13, so that the conical surface of the diffusion cone 121 can provide guidance for the powder and compressed air entering the discharge channel 13 without forming a blockage at the inlet end of the discharge channel 13, so that the compressed air carrying the powder entering the inlet end of the discharge channel 13 is accelerated, and the pressure at the inlet end of the discharge channel 13 is reduced to suck the compressed air and powder in the diffusion channel 12, so as to complete the powder spraying operation stably and smoothly.

[0058] like Figure 1 As shown, in some embodiments, the main body 1 is provided with an opening 14 connected to the diffusion channel 12, and the opening 14 is connected to the outlet end of the one-way valve 15 so that the purge air enters the main body 1 through the inlet end of the one-way valve 15 and purges the feed channel 11, the diffusion channel 12 and the discharge channel 13.

[0059] Specifically, in order to avoid the accumulation of residual powder in the nozzle causing blockage after the powder spraying device is shut down, the present application sets an opening 14 connected to the diffusion channel 12 on the body 1, and connects the outlet end of the one-way valve 15 through the opening 14 so that the purge air enters the body 1 through the inlet end of the one-way valve 15, and the diffusion channel 12, as well as the feed channel 11 and the diffusion channel 12 connected to the diffusion channel 12 can be purged to prevent the powder from agglomerating and clogging. The present application can make the purge air leak from the opening 14 during the purge process through the setting of the one-way valve 15, the outlet end of the one-way valve 15 is connected to the opening 14 through a pipe thread, the inlet end of the one-way valve 15 can be connected to the clean air pipe, and the clean air pipe can be provided with a purge air valve. When the powder spraying device is shut down, the purge air valve can be controlled to open automatically, and the clean air pushes the one-way valve 15 open and enters the diffusion channel 12, and the feed channel 11 and the discharge channel 13 connected to the diffusion channel 12 are purged at the same time.

[0060] like Figure 2 As shown, in some embodiments, a baffle 16 is protruded from one end of the body 1 where the discharge channel 13 is provided to enclose a powder spraying space 161 , and the outlet end of the discharge channel 13 can spray powder on the glass to be powder-sprayed in the powder spraying space 161 .

[0061] Specifically, in order to further improve the accuracy of the nozzle operation and the powder spraying efficiency, so that the powder is evenly sprayed on the set area of ​​the glass surface to be sprayed, and at the same time ensure the cleanliness of the production environment, a baffle 16 is protruded at one end of the discharge flow channel 13 of the present application, so that the outlet end of the discharge flow channel 13 can spray powder on the glass to be sprayed in the powder spraying space 161 enclosed by the baffle 16, so as to limit the operating range of the nozzle spraying powder to the glass surface to be sprayed by the baffle 16, avoid mis-spraying, and improve the powder spraying efficiency and powder spraying effect. In the present application, the baffle 16 can be two pieces respectively arranged on both sides of the main body 1 along the transmission direction during the glass powder spraying operation, or four pieces, enclosing a rectangular space to limit the operating range of the nozzle spraying powder to the glass surface to be sprayed, which is not limited to the specific one, and can ensure the cleanliness of the production environment and make the powder evenly sprayed on the set area of ​​the glass surface to be sprayed.

[0062] Embodiment 2

[0063] A second aspect of the present application provides a powder spraying device, comprising the above-mentioned nozzle.

[0064] Specifically, please refer to the first embodiment for the specific structure of the nozzle, which will not be described in detail here.

[0065] A second aspect of the present application provides a powder spraying device, comprising a nozzle, the nozzle comprising a main body 1, the main body 1 having a feed channel 11, a diffuser channel 12 and a discharge channel 13 connected in sequence, the inner diameter of the diffuser channel 12 being larger than the feed channel 11 and the discharge channel 13, a first contraction section 111 being arranged in the feed channel 11, and the inner diameter of the first contraction section 111 decreasing along a first direction A from an inlet end to an outlet end of the feed channel 11. The nozzle of the present application adds a first contraction section 111 in the feed channel 11 of the main body 1, so that when the nozzle is performing powder spraying operation, compressed air carries the powder into the feed channel 11 and is transported along the first direction A. Since the inner diameter of the first contraction section 111 decreases gradually, the cross-sectional area gradually decreases, so that the flow rate of the compressed air carrying the powder passing through the first contraction section 111 increases, and then the flow rate of the compressed air carrying the powder when output from the outlet end of the feed channel 11 increases, which is beneficial to the uniform dispersion of the powder in the compressed air, and then the compressed air and powder entering the subsequent diffusion channel 12 have a more uniform and stable flow state, thereby ensuring that the compressed air and powder output from the diffusion channel 12 to the discharge channel 13 have good uniformity. Furthermore, the present application can effectively convert the static pressure energy of powder and compressed air into kinetic energy through the acceleration process, thereby making the powder and compressed air flow at high speed in front of the diffusion channel 12, and the diffusion channel 12 provides a larger space to help the compressed air carrying the powder to effectively convert its kinetic energy back into static pressure energy during the transportation process, thereby reducing energy loss, thereby improving the overall energy conversion efficiency, energy utilization efficiency and powder spraying capacity of the nozzle, thereby avoiding the uneven thickness of the glass isolation layer formed by powder spraying or even the absence of powder in some areas, and ensuring the isolation and protection effect between glasses through powder. Through the application of the present application, the problem of poor uniformity of nozzle powder spraying in the prior art, resulting in uneven thickness of the glass isolation layer or even the absence of powder in some areas, affecting the isolation and protection effect between glasses, is solved.

[0066] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0067] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A nozzle, characterized in that: include: A body (1), wherein the body (1) has a feed channel (11), a diffusion channel (12) and a discharge channel (13) which are connected in sequence, the inner diameter of the diffusion channel (12) is larger than the feed channel (11) and the discharge channel (13), and a first contraction section (111) is provided in the feed channel (11), and the inner diameter of the first contraction section (111) decreases along a first direction (A) from an inlet end to an outlet end of the feed channel (11).

2. The nozzle according to claim 1, characterized in that A first diffuser section (112) is also provided in the feed flow channel (11), the inlet end of the first diffuser section (112) is connected to and communicates with the outlet end of the first contraction section (111), and the inner diameter of the first diffuser section (112) increases along the first direction (A) from the inner diameter at the narrowest point equal to that of the first contraction section (111); The widest inner diameter of the outlet end of the first diffuser section (112) is the same as the widest inner diameter of the inlet end of the first contraction section (111), and is smaller than the inner diameter of the diffuser flow channel (12).

3. The nozzle according to claim 2, characterized in that A first transition section (113) is also provided in the feed flow channel (11), the inner diameter of the first transition section (113) being the same as the inner diameter of the narrowest part of the first contraction section (111), and the two ends of the first transition section (113) being connected and communicating with the first contraction section (111) and the first diffusion section (112).

4. The nozzle according to any one of claims 1 to 3, characterized in that: The discharge flow channel (13) comprises a second contraction section (131) and a second diffusion section (132); the inlet end of the second contraction section (131) is connected to the diffusion flow channel (12); the inner diameter of the second contraction section (131) decreases along a second direction (B) from the inlet end to the outlet end of the discharge flow channel (13); the inlet end of the second diffusion section (132) is connected to and communicates with the outlet end of the second contraction section (131); and the inner diameter of the second diffusion section (132) increases along the second direction (B) from the inner diameter at the narrowest point equal to that of the second contraction section (131).

5. The nozzle according to claim 4, characterized in that A second transition section (133) is also provided in the discharge flow channel (13), and the second transition section (133) includes a first section (1331) and a second section (1332) that are connected along the second direction (B), the first section (1331) is connected to the second contraction section (131), and the second section (1332) is connected to the second diffusion section (132); The inner diameter of the first segment (1331) decreases along the second direction (B) from the inner diameter of the narrowest point equal to the inner diameter of the second contraction segment (131), and the inner diameter of the second segment (1332) increases along the second direction (B) from the inner diameter of the narrowest point equal to the inner diameter of the first segment (1331) to the inner diameter of the narrowest point equal to the second diffusion segment (132).

6. The nozzle according to claim 5, characterized in that The feed flow channel (11) and the diffuser flow channel (12) are each one and are cylindrical, with the axis coinciding with the center line of the body (1); the discharge flow channels (13) are four and are evenly distributed circumferentially relative to the center line; the four discharge flow channels (13) are all connected to the diffuser flow channel (12).

7. The nozzle according to claim 6, characterized in that A diffusion cone (121) is provided in the diffusion channel (12), and the diffusion cone (121) protrudes toward the outlet end of the feed channel (11), and an outer edge of the diffusion cone (121) on one side facing away from the feed channel (11) is close to the center line relative to the discharge channel (13).

8. The nozzle according to claim 1, characterized in that The body (1) is provided with an opening (14) connected to the diffusion channel (12), and the opening (14) is connected to the outlet end of the one-way valve (15) so that the purge air enters the body (1) through the inlet end of the one-way valve (15) and purges the feed channel (11), the diffusion channel (12) and the discharge channel (13).

9. The nozzle according to claim 1, characterized in that Also includes: One end of the body (1) where the discharge flow channel (13) is provided is protrudingly provided with a baffle (16) to enclose a powder spraying space (161); the outlet end of the discharge flow channel (13) is capable of spraying powder on the glass to be powder sprayed in the powder spraying space (161).

10. A powder spraying device, characterized in that: include: A nozzle as claimed in any one of claims 1 to 9.

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