A spray nozzle

Abstract

The present application relates to the technical fields of liquid atomization, and particularly to a spray nozzle, comprising a liquid flow channel, the liquid flow channel comprising a liquid inlet and a liquid outlet, the liquid outlet being an annular opening, and the liquid outlet having an opening trend from the center axis close to the liquid inlet to the center axis far from the liquid inlet, the annular and opening-trend liquid outlet further comprising a gas flow channel, the gas flow channel comprising a gas inlet and a gas outlet, the gas outlet being used to spray compressed gas onto the liquid sprayed from the liquid outlet, so that the liquid is atomized after being collided by the compressed gas. The spray nozzle disclosed by the present application provides umbrella-ring-shaped atomization space for liquid droplets, which is different from the umbrella-shaped atomization space in the traditional structure, and can provide more atomization space for atomized liquid, thereby having the technical effects of increasing the atomization amount and improving the atomization speed.

Description

Technical Field

[0001] This invention relates to the field of liquid atomization technology, specifically to a spray nozzle. Background Technology

[0002] A liquid that is pressurized and then sprayed out as a mist is called an airflow spray nozzle. Commercially available airflow spray nozzles include those with two-fluid or three-fluid structures. Their liquid and gas channels are coaxial with the spray nozzle, resulting in a small nozzle orifice. The atomized area formed after atomization is an umbrella-shaped structure, which makes it difficult to improve the atomization speed and atomization volume.

[0003] In view of the above-mentioned defects, this application provides a spray nozzle to solve the problems of the prior art. Summary of the Invention

[0004] The purpose of this invention is to provide a spray nozzle to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a spray nozzle, including a liquid flow channel, the liquid flow channel including an inlet and an outlet, the outlet being annular, and the outlet opening outward from the central axis near the inlet towards the direction away from the central axis of the inlet. The annular and opening outlet provides an umbrella-shaped atomization space for the droplets, which is different from the umbrella-shaped atomization space in the traditional structure. It can provide more atomization space for the atomized liquid, thereby increasing the atomization amount and improving the atomization speed.

[0006] Preferably, a spray nozzle further includes a gas flow channel, which includes an air inlet and an air outlet. The air outlet is used to spray compressed gas onto the liquid sprayed from the liquid outlet, so that the liquid is atomized after being collided with the compressed gas.

[0007] Preferably, the air outlet is an annular air outlet, and the plane where the annular air outlet is located intersects with the plane where the liquid outlet is located. The annular air outlet is used to correspond to the annular liquid outlet, that is, to provide compressed air that collides with the annular sprayed liquid.

[0008] Preferably, there are two or more liquid outlets to further increase the atomization amount, and the planes on which the two or more liquid outlets are located intersect, so that the liquids sprayed from the two or more liquid outlets intersect, thereby facilitating the simultaneous supply of compressed air to the intersecting liquids.

[0009] Preferably, there are two or more annular air outlets, which are used to provide compressed air to the atomized liquid.

[0010] Preferably, the liquid flow channel is a cylindrical annular flow channel, and the liquid inlet is an annular port. The annular liquid inlet and the liquid flow channel are used to provide a quantity of liquid that matches the annular liquid outlet.

[0011] Preferably, the liquid flow channel includes: an inlet flow channel, which is arranged parallel to the central axis of the spray nozzle, and one end of the inlet flow channel is an inlet; and an outlet flow channel, which forms an angle with the central axis of the spray nozzle, one end of which is connected to the other end of the inlet flow channel, and the other end of which is an outlet.

[0012] Preferably, the liquid flow channel further includes a connecting channel, wherein the liquid inlet flow channel is perpendicularly arranged between the central axis of the spray nozzle and the liquid outlet flow channel, and its two ends are respectively connected to the liquid inlet flow channel and the liquid outlet flow channel.

[0013] Preferably, the gas flow channel is a cylindrical annular flow channel, with both the inlet and outlet being annular openings.

[0014] Preferably, the gas flow channel includes: an inlet flow channel, which is arranged parallel to the central axis of the spray nozzle, and one end of the inlet flow channel is an air inlet; and an outlet flow channel, which is perpendicular to the central axis of the spray nozzle, one end of which is connected to the other end of the inlet flow channel, and the other end of which is an air outlet.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The spray nozzle disclosed in the present invention is designed with an annular spray nozzle that opens along the central axis of the spray nozzle, breaking through the umbrella-shaped atomization space in the traditional structure, so that the atomization space is formed into an umbrella ring, providing more atomization space for atomized droplets, thereby improving atomization efficiency and increasing atomization volume. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of a two-fluid spray nozzle;

[0018] Figure 2 This is a schematic diagram of the structure of a three-fluid spray nozzle;

[0019] Figure 3 This is a cross-sectional view of the spray nozzle 1 in an embodiment of the present invention;

[0020] Figure 4 This is a cross-sectional schematic diagram of the spray nozzle 1 spraying atomized droplets in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of atomized droplets being ejected from the first liquid outlet 112 in an embodiment of the present invention;

[0022] Figure 6 This is a top view schematic diagram of the spray nozzle 1 spraying atomized droplets in an embodiment of the present invention. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Commercially available spray nozzles are generally of a two-fluid or three-fluid structure, such as... Figure 1 This is a schematic diagram of a two-fluid spray nozzle. Figure 2 This is a schematic diagram of the structure of a three-fluid spray nozzle. Figures 1-2 As can be seen, the atomized droplets ejected by both are formed into umbrella-shaped regions, resulting in limited atomization space for the atomized droplets, which in turn limits the amount of atomization. In order to increase the atomization space of the droplets, this invention considers breaking through the umbrella-shaped atomization space in the traditional structure and forming an annular atomization space. The annular space that occupies the largest volume is the annular space formed by the annular spray nozzle itself. That is, the droplets in this annular space are ejected from the annular nozzle perpendicular to the central axis of the spray nozzle.

[0025] Based on the above, this application provides an embodiment, specifically a preferred implementation of a spray nozzle 1.

[0026] Specifically, such as Figure 3 This is a cross-sectional view of spray nozzle 1, from... Figure 1 It can be seen from the above that the spray nozzle 1 includes a liquid flow channel, which includes an inlet and an outlet. The liquid flow channel includes a first liquid flow channel 11 and a second liquid flow channel 12. The inlet includes a first inlet 111 and a second inlet 121. The outlet includes a first outlet 112 and a second outlet 122.

[0027] Furthermore, such as Figure 4 This is a cross-sectional schematic diagram of atomized droplets ejected from the spray nozzle 1. The first inlet 111 and the first outlet 112 are located at both ends of the first liquid flow channel 11. The first outlet 112 is an annular opening, and the plane M in which the opening direction of the first outlet 112 is located tends to open in the direction from the central axis L near the spray nozzle 1 to away from the central axis L of the spray nozzle 1, so that the droplets ejected from the first outlet 112 form an umbrella-shaped annular structure H (e.g., Figure 5 As shown, Figure 5(A schematic diagram of atomized droplets ejected from the first liquid outlet 112) This design differs from the umbrella-shaped structure in traditional structures, thus providing more atomization space for the atomized droplets.

[0028] Furthermore, such as Figure 4 The second liquid inlet 121 and the second liquid outlet 122 are located at both ends of the second liquid flow channel 12. The second liquid outlet 122 is an annular opening, and the plane M' where the opening direction of the second liquid outlet 122 is located also tends to open in the direction from the central axis L near the spray nozzle 1 to away from the central axis L of the spray nozzle 1. Setting two liquid flow channels can further increase the atomization amount, and the droplets sprayed from the second liquid outlet 122 can also form an umbrella-shaped structure.

[0029] Furthermore, to further improve the atomization effect, the droplets ejected from the first liquid channel 11 and the droplets ejected from the second liquid channel 12 are made to intersect, and compressed air is ejected into the intersecting droplets. This can improve the atomization effect. Specifically, Figure 4 The plane M where the opening direction of the first liquid outlet 112 is located intersects with the plane M' where the opening direction of the second liquid outlet 122 is located, so that the umbrella-shaped structure formed by the droplets sprayed from the first liquid outlet 112 intersects with the umbrella-shaped structure formed by the droplets sprayed from the first liquid outlet 112, thereby making the droplets form an umbrella-shaped atomization space N on each cross section of the spray nozzle 1, which is equivalent to the effect that multiple traditional spray nozzles can achieve in a ring.

[0030] Furthermore, as mentioned above, when a droplet with an umbrella-shaped structure H is ejected in a vertical direction P (the vertical direction P is perpendicular to the central axis L of the spray nozzle), the angle α of the umbrella-shaped structure ( Figure 5 (As shown) the spray volume can reach its maximum when it reaches its maximum, therefore, as Figure 4 In this embodiment, the first liquid outlet 112 and the second liquid outlet 122 are disposed on the circumferential surface F of the spray nozzle 1. The plane M containing the opening direction of the first liquid outlet 112 forms a 45° angle with the central axis L of the spray nozzle, and the plane M' containing the opening direction of the second liquid outlet 122 also forms a 45° angle with the central axis L of the spray nozzle. This ensures that the central axis D of the atomization space N is parallel to the vertical direction P, achieving the effect of droplets being ejected in the vertical direction P, i.e., forming the effect of atomized droplets being ejected circumferentially from the spray nozzle 1 (e.g., Figure 6 As shown, Figure 6 (Top view schematic diagram of atomized droplets sprayed from spray nozzle 1).

[0031] Furthermore, both the first liquid flow channel 11 and the second liquid flow channel 12 are cylindrical annular flow channels, and the first liquid inlet 111 and the second liquid inlet 121 are annular openings, which are used to match the annular first liquid outlet 112 and the second liquid outlet 122.

[0032] Furthermore, the liquid flow channel also includes an inlet flow channel and an outlet flow channel, specifically, such as... Figure 4 The liquid inlet channel includes a first liquid inlet channel 113 and a second liquid inlet channel 123, and the liquid outlet channel includes a first liquid outlet channel 114 and a second liquid outlet channel 124.

[0033] Furthermore, such as Figure 4 The first liquid inlet channel 113 and the first liquid outlet channel 114 are channels within the first liquid channel 11 that are respectively connected to the first liquid inlet 111 and the first liquid outlet 112. Specifically, the first liquid inlet channel 113 is a cylindrical annular channel with the central axis L of the spray nozzle 1 as its axis, and is arranged parallel to the central axis L. The first liquid inlet 111 is located at one end of the first liquid inlet channel 113. The first liquid outlet channel 114 is a cylindrical annular channel with the central axis L of the spray nozzle 1 as its axis, and is arranged at an angle to the central axis L. The first liquid outlet 112 is located at one end of the first liquid outlet channel 114.

[0034] Furthermore, such as Figure 4 The second liquid inlet channel 123 and the second liquid outlet channel 124 are channels within the second liquid channel 12 that are respectively connected to the second liquid inlet 121 and the second liquid outlet 122. Specifically, the second liquid inlet channel 123 is a cylindrical annular channel with the central axis L of the spray nozzle 1 as its axis, and is arranged parallel to the central axis L. The second liquid inlet 121 is located at one end of the second liquid inlet channel 123. The second liquid outlet channel 124 is a cylindrical annular channel with the central axis L of the spray nozzle 1 as its axis, and is arranged at an angle to the central axis L. The second liquid outlet 122 is located at one end of the second liquid outlet channel 124.

[0035] Furthermore, the liquid flow channel also includes connecting channels, such as... Figure 4 The connecting channel includes a first connecting channel 115 and a second connecting channel 125. The first connecting channel 115 is a channel in the first liquid flow channel 11 that is connected to the first liquid inlet channel 113 and the first liquid outlet channel 114 respectively. It is perpendicular to the central axis L of the spray nozzle 1. It is used to avoid the channels being too close together and to ensure the gap between the channels, thereby ensuring the durability and strength of the spray nozzle 1.

[0036] Furthermore, the spray nozzle 1 also includes a gas flow channel, which includes an inlet and an outlet. The outlet is used to spray gas onto the liquid sprayed from the outlet, causing the liquid to atomize after being struck by the gas. Figure 3 In this embodiment, the gas flow channel includes a first gas flow channel 13 and a second gas flow channel 14, such as... Figure 4The air inlet includes a first air inlet 131 and a second air inlet 141, and the air outlet includes a first air outlet 132 and a second air outlet 142. The first gas flow channel 13 and the second gas flow channel 14 are both located between the first liquid flow channel 11 and the second liquid flow channel 12. At the same time, the first air inlet 131 and the second air inlet 141 are both located between the first liquid inlet 111 and the second liquid inlet 121. The first air outlet 132 and the second air outlet 142 are located between the first liquid outlet 112 and the second liquid outlet 122. They are used to spray compressed air through the air outlet into the liquid that intersects after being sprayed out of the two liquid outlets, thereby further dispersing and atomizing the liquid.

[0037] Furthermore, in order to adapt to the liquid flow channel, the gas flow channel is also set as a cylindrical annular flow channel, with both the inlet and outlet being annular openings.

[0038] Furthermore, the gas flow channel also includes an inlet flow channel and an outlet flow channel, such as... Figure 4 The inlet air passage includes a first inlet air passage 133 and a second inlet air passage 143, and the outlet air passage includes a first outlet air passage 134 and a second outlet air passage 144.

[0039] Furthermore, such as Figure 4 The first inlet flow channel 133 and the first outlet flow channel 134 are connected to each other. They are flow channels in the first gas flow channel 13 that are connected to the first inlet port 131 and the first outlet port 132, respectively. Specifically, the first inlet flow channel 133 is a cylindrical annular flow channel with the central axis L of the spray nozzle 1 as the axis, and is arranged parallel to the central axis L. The first inlet port 131 is located at one end of the first inlet flow channel 133. The first outlet flow channel 134 is a cylindrical annular flow channel with the central axis L of the spray nozzle 1 as the axis, and is arranged perpendicular to the central axis L. The first outlet port 132 is located at one end of the first outlet flow channel 134.

[0040] Furthermore, such as Figure 4 The second inlet flow channel 143 and the second outlet flow channel 144 are connected to each other. They are flow channels in the second gas flow channel 14 that are connected to the second inlet port 141 and the second outlet port 142, respectively. Specifically, the second inlet flow channel 143 is a cylindrical annular flow channel with the central axis L of the spray nozzle 1 as the axis, and is arranged parallel to the central axis L. The second inlet port 141 is located at one end of the second inlet flow channel 143. The second outlet flow channel 144 is a cylindrical annular flow channel with the central axis L of the spray nozzle 1 as the axis, and is arranged perpendicular to the central axis L. The second outlet port 142 is located at one end of the second outlet flow channel 144.

[0041] When the spray nozzle 1 in the above embodiment 1, along with the two-fluid nozzle and the three-fluid nozzle, were all installed on the spraying equipment to spray the same equipment, it was found that the spraying efficiency of the two-fluid nozzle and the three-fluid nozzle was a maximum of 250 kg / h, while the spray nozzle 1 in this embodiment could reach 3000 kg / h, indicating that the spray nozzle provided in this application significantly improves the spraying efficiency compared with the prior art.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A spray nozzle, characterized in that, It includes a liquid flow channel, which includes an inlet and an outlet. The outlet is an annular opening, and the plane in which the opening direction of the outlet is located tends to open outward from the central axis of the spray nozzle towards the direction away from the central axis of the spray nozzle. The liquid outlet has two or more outlets, and the planes in which the opening directions of the two or more outlets lie intersect. It also includes a gas flow channel, which includes an inlet and an outlet. The outlet is used to spray gas onto the liquid sprayed from the outlet, so that the liquid is atomized by the collision of the gas. The air outlet is an annular air outlet, and the plane in which the annular air outlet is located intersects with the plane in which the liquid outlet is located; The liquid flow channel is a cylindrical annular flow channel, and the liquid inlet is an annular opening; The liquid flow channel includes: The liquid inlet channel is arranged parallel to the central axis of the spray nozzle, and one end of the liquid inlet channel is the liquid inlet. And a liquid outlet channel, which forms an angle with the central axis of the spray nozzle, one end of which is connected to the other end of the liquid inlet channel, and the other end of which is the liquid outlet; The liquid flow channel also includes a connecting channel, wherein the liquid inlet flow channel is perpendicularly arranged between the central axis of the spray nozzle and the liquid outlet flow channel, and its two ends are respectively connected to the liquid inlet flow channel and the liquid outlet flow channel; The gas flow channel is a cylindrical annular flow channel, and both the gas inlet and the gas outlet are annular openings; The gas flow channel includes: An air inlet channel is provided, which is parallel to the central axis of the spray nozzle, and one end of the air inlet channel is the air inlet. And an air outlet channel, which is perpendicular to the central axis of the spray nozzle, with one end connected to the other end of the air inlet channel and the other end being the air outlet.

2. A spray nozzle according to claim 1, characterized in that: There are also two or more annular air outlets.

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