A two-fluid spray device with uniform spray

Abstract

This utility model relates to the field of etching / developing spray technology, specifically to a two-fluid spraying device for uniform spraying, including a support base and multiple nozzles. The nozzles are installed one-to-one in multiple mounting holes on the support base, which has an air inlet channel and a liquid inlet channel. Each nozzle includes a nozzle seat, a nozzle body, and a locking component. The nozzle body and nozzle seat can only be inserted and fixed in a preset orientation. The nozzle seat has a through-hole for liquid inlet and an air inlet for connecting the nozzle body. The nozzle seat and mounting holes can only be inserted and fixed in a preset orientation. The inlet of the air inlet connects to the air inlet channel, and the inlet of the liquid inlet connects to the liquid inlet channel. The spray direction of the nozzle body is determined from the installation perspective, and the spray landing line of the nozzle body is offset by a preset angle relative to the nozzle arrangement direction. Therefore, the spray landing lines of the multiple nozzles on the PCB board are arranged at an angle without intersecting, avoiding overlapping water droplets that cancel each other out, ensuring effective and uniform spraying on the PCB board.

Description

Technical Field

[0001] This utility model relates to the field of etching / developing spray technology, specifically to a two-fluid spraying device with uniform spraying. Background Technology

[0002] Etching is a technique that removes material using chemical reactions or physical impact. Etching technology can be divided into two categories: wet etching and dry etching. Etching, also known as photochemical etching, refers to the process of removing the protective film from the area to be etched after exposure and development, followed by contact with a chemical solution during etching to achieve a dissolving and corroding effect, creating raised or hollowed-out shapes. Generally, the larger the etching droplets sprayed onto the substrate, the more severe the lateral etching, which significantly affects the accuracy of printed conductors on the substrate. Therefore, to improve the accuracy of printed conductors on the substrate, it is necessary to reduce the volume of etching droplets sprayed onto the substrate during the etching process, which places high demands on the precision of the etching machine. To address this, a two-fluid etching device has emerged on the market.

[0003] For example, Chinese patent document CN212278554U discloses a two-fluid etched manifold, which includes a manifold body and multiple spray devices disposed on the manifold body. The multiple spray devices are arranged sequentially along the length of the manifold body. Each spray device includes a spray body and a nozzle disposed on the spray body. The spray body is mounted on the manifold body. The spray body is provided with an air inlet and a liquid inlet, which are arranged sequentially along the length of the spray body. A gas supply is provided on the manifold body. The system includes a gas inlet and a liquid inlet. The gas inlet is connected to the air inlet on each spray body via a gas delivery pipe, and the liquid inlet is connected to the liquid inlet on each spray body via a liquid delivery pipe. The nozzle is mounted on the spray body via a detachable connection structure. The spray body has a limiting groove at a corresponding position to restrict the rotation of the nozzle, and the nozzle has a mating part that engages with the limiting groove. When the nozzle is mounted on the spray body via the detachable connection structure, the mating part on the nozzle engages with the limiting groove on the spray body. This two-fluid etching manifold allows for fixing the nozzle's installation angle during nozzle replacement, saving time spent manually adjusting the nozzle's installation angle and increasing the nozzle installation speed.

[0004] For example, Chinese patent document CN219592725U relates to the field of PCB etching technology, specifically a two-fluid etching spray system, including: a gas system, a liquid system, and a two-fluid mixing nozzle; the two-fluid mixing nozzle is provided with a gas inlet, a liquid inlet, and a nozzle; the gas system is connected to the gas inlet to provide the driving gas required for spraying; the liquid system is connected to the liquid inlet to provide the etching liquid required for spraying; the driving gas and etching liquid are mixed in the two-fluid mixing nozzle and then sprayed out from the nozzle; the gas system is equipped with a gas heating system. This eliminates the problem of spray temperature drop after gas-liquid mixing caused by the temperature difference between the gas and liquid fluids. This ensures that the temperature of the etching liquid after atomization is not significantly affected by the gas and liquid fluids, thereby effectively improving etching quality and etching rate. Compared with traditional two-fluid etching technology, the control of gas and liquid fluid temperature significantly improves the manufacturing capability and yield of precision circuits.

[0005] In the existing technology, the nozzles are arranged such that the water jets of each nozzle are fan-shaped and directed toward the PCB board. The fan-shaped sprays of two adjacent nozzles intersect, and the overlapping parts of the water jets cancel each other out. This position cannot be effectively sprayed onto the PCB board, resulting in uneven spraying. Utility Model Content

[0006] In view of the above-mentioned technical problems existing in the prior art, the present invention provides a two-fluid spraying device with uniform spraying.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A two-fluid spraying device with uniform spraying is provided, comprising a support base and a plurality of nozzles. The support base has a plurality of mounting holes arranged in a row, and the plurality of nozzles are installed in the plurality of mounting holes in a corresponding manner. The support base is provided with an air inlet channel and a liquid inlet channel. Its characteristic feature is: Each nozzle includes a nozzle seat, a nozzle body, and a locking element. The locking element fixes the nozzle body to the front end of the nozzle seat, and a first anti-fooling structure is provided between the nozzle body and the nozzle seat, so that the nozzle body and the nozzle seat can only be inserted and fixed in a preset position. The nozzle seat has a liquid inlet and an air inlet that communicate with the nozzle body. The nozzle seat is fixed to the mounting hole, and a second anti-fooling structure is provided between the nozzle seat and the mounting hole, so that the nozzle seat and the mounting hole can only be inserted and fixed in a preset position; The air inlet is connected to the air intake channel, and the liquid inlet is connected to the liquid intake channel; the water jet pattern of the nozzle body is fan-shaped, and the jet landing line is offset by a preset angle relative to the nozzle arrangement direction.

[0008] Specifically, the locking element is a nut, and the front end of the nozzle seat has an external thread. The nut engages with the external thread to press the nozzle body.

[0009] Specifically, the first foolproof structure includes a first limiting outer wall located on the outer side of the front end of the nozzle seat and a first limiting inner wall located on the nozzle body. The first limiting outer wall is embedded in the first limiting inner wall, thereby ensuring that the nozzle seat and the nozzle body can only be assembled in a preset orientation.

[0010] Specifically, the support base includes a front cover plate, a middle plate, and a rear cover plate that are stacked and fixed in sequence. An air inlet channel is formed between the rear cover plate and the middle plate, and a liquid inlet channel is formed between the front cover plate and the middle plate. The middle plate and the front cover plate are provided with the mounting holes that are aligned one-to-one.

[0011] Specifically, the air inlet is located on the rear end face of the nozzle seat, and the liquid inlet is located on the side of the nozzle seat.

[0012] Specifically, each nozzle seat is provided with multiple liquid inlet holes, which are arranged circumferentially around the air inlet hole.

[0013] Specifically, the mounting hole is a stepped hole, and the outer side of the nozzle seat is provided with a first flange and a second flange. The first flange is embedded in the mounting hole of the middle plate, and the second flange is embedded in the mounting hole of the front cover plate.

[0014] Specifically, the second anti-foolproof structure includes a second limiting outer wall located outside the second flange and a second limiting inner wall located in the front cover mounting hole. The second limiting outer wall is embedded in the second limiting inner wall, so that the nozzle seat and the mounting hole can only be assembled in a preset orientation.

[0015] Specifically, the spray landing line of the nozzle body is offset by an angle of 3° to 15° relative to the nozzle arrangement direction.

[0016] Specifically, the spray landing line of the nozzle body is offset by an angle of 5° relative to the nozzle arrangement direction.

[0017] The beneficial effects of this utility model are: This utility model discloses a two-fluid spraying device for uniform spraying. A first anti-foolproof structure is provided between the nozzle body and the nozzle seat, ensuring that the nozzle body and nozzle seat can only be inserted and fixed in a preset orientation. A second anti-foolproof structure is provided between the nozzle seat and the mounting hole, ensuring that the nozzle seat and mounting hole can only be inserted and fixed in a preset orientation. These structures allow the nozzles to be installed in a preset orientation, thus determining the spray direction of the nozzle body from the installation perspective. Furthermore, the spray landing line of the nozzle body is offset by a preset angle relative to the nozzle arrangement direction. Therefore, the spray landing lines of multiple nozzles on the PCB board are arranged at an angle without intersecting, avoiding overlapping water patterns and mutual cancellation, ensuring effective and uniform spraying on the PCB board. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a two-fluid spraying device with uniform spraying in one embodiment.

[0020] Figure 2 for Figure 1 A magnified view of the circled area.

[0021] Figure 3 This is a schematic diagram of the structure of a two-fluid spraying device with uniform spraying, as shown in the embodiment, from another perspective.

[0022] Figure 4 This is a schematic diagram of the nozzle structure in the embodiment.

[0023] Figure 5 This is an exploded view of the nozzle in the embodiment.

[0024] Figure 6 This is a cross-sectional view of the nozzle seat in the embodiment.

[0025] Figure 7 This is a schematic diagram showing the usage state of the etching line spraying device in the embodiment.

[0026] Figure 8 This is a schematic diagram showing the arrangement of the nozzle bodies in an embodiment.

[0027] Support base 100, front cover plate 1, middle plate 2, rear cover plate 3, air inlet channel 4, liquid inlet channel 5, mounting hole 6, air inlet pipe 7, liquid inlet pipe 8; Nozzle 9, nozzle seat 91, liquid inlet hole 911, air inlet hole 912, first flange 913, second flange 914, first limiting outer wall 915, second limiting outer wall 916, nozzle body 92, first limiting inner wall 921, locking member 93.

[0028] Figure label: Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] This embodiment provides a two-fluid spraying device for uniform spraying, such as... Figures 1 to 6As shown, the device includes a support base 100 and multiple nozzles 9. The support base 100 includes a front cover plate 1, a middle plate 2, and a rear cover plate 3, which are stacked and fixed in sequence. The sides of the rear cover plate 3 and the middle plate 2 facing each other are slotted to form an air inlet channel 4, and the sides of the front cover plate 1 and the middle plate 2 facing each other are slotted to form a liquid inlet channel 5. The middle plate 2 and the front cover plate 1 are provided with aligned mounting holes 6. The front cover plate 1, the middle plate 2, and the rear cover plate 3 are all elongated plates, and the multiple mounting holes 6 are arranged separately along the length of the elongated plates.

[0031] The spray device also includes multiple nozzles 9. Each nozzle 9 includes a nozzle seat 91, a nozzle body 92, and a locking member 93. The locking member 93 fixes the nozzle body 92 to the front end of the nozzle seat 91. The nozzle seat 91 has a through-hole 911 for liquid inlet and 912 for air inlet, which are connected to the nozzle body 92. The inlet of the air inlet 912 is located on the rear end face of the nozzle seat 91, and the inlet of the liquid inlet 911 is located on the side of the nozzle seat 91. The nozzle seat 91 is fixed to the mounting holes 6 of the middle plate 2 and the front cover plate 1. The inlet of the air inlet 912 is connected to the air intake channel 4, and the inlet of the liquid inlet 911 is connected to the liquid intake channel 5. In use, the gas in the air intake channel 4 enters the nozzle body 92 through the air inlet 912 of the nozzle 9, and the liquid in the liquid intake channel 5 enters the nozzle body 92 through the liquid inlet 911 of the nozzle 9. At the nozzle body 92, the gas impacts the liquid to create an outward spray effect.

[0032] During assembly, first fix the nozzle 9 to the front cover plate 1, observing that the inlet position of the liquid inlet 911 protrudes from the top surface of the front cover plate 1; then install the middle plate 2, observing that the inlet position of the air inlet 912 protrudes from the top surface of the middle plate 2, ensuring installation accuracy; finally, fix the rear cover plate 3. Alternatively, first fix the front cover plate 1, middle plate 2, and rear cover plate 3 together, and then insert each nozzle 9 into the corresponding mounting hole 6.

[0033] Specifically, the locking element 93 is a nut with a step inside, and the front end of the nozzle seat 91 has an external thread. The nut engages with the external thread to press the nozzle body 92. In practice, the locking element 93 can also be a screw, which can also fix the nozzle body 92.

[0034] Specifically, the mounting hole 6 is a stepped hole, and the outer side of the nozzle seat 91 is provided with a first flange 913 and a second flange 914. The first flange 913 is embedded in the mounting hole 6 of the middle plate 2, and the second flange 914 is embedded in the mounting hole 6 of the front cover plate 1. When installing the nozzle 9, the first flange 913 and the second flange 914 provide a reference. As long as they are embedded in place, it means that the installation is in place.

[0035] Specifically, the first flange 913 and the second flange 914 are interference-fitted with the corresponding mounting holes 6.

[0036] like Figure 7The diagram shown illustrates the usage state. The nozzle body 92 sprays water in a fan shape with an angle of approximately 50° to 65°. The spray range on the PCB board is a straight line, i.e., the spray landing line. To prevent the fan-shaped water patterns of two adjacent nozzles 9 from intersecting, the outlet of the nozzle body 92 is rotated by a preset angle relative to the arrangement direction of the nozzles 9. Figure 7 The angle u in the diagram represents the tilt angle of the nozzle body 92 outlet as shown from above. The tilt offset angle is 3° to 15°, preferably 5° to 10° (the optimal angle can be selected based on the actual operating environment). Line k also indicates the arrangement of the landing lines of multiple nozzles 9. Alternatively, it can be shown as... Figure 8 As shown, the strip-shaped outlets of each nozzle body 92 are not arranged in a straight line, but rather sideways. This results in the spraying effect of the multiple nozzles 9 as follows: Figure 7 The lines indicated by 'k' will not intersect.

[0037] To ensure that the installation orientation of the nozzle body 92 is determined after the nozzle 9 is installed, this embodiment achieves the following: In this embodiment, the installation orientation between the nozzle seat 91 and the nozzle body 92 of the nozzle 9 is fixed: a first anti-foolproof structure is provided between the nozzle body 92 and the nozzle seat 91, so that the nozzle body 92 and the nozzle seat 91 can only be inserted and fixed in a preset orientation.

[0038] The first anti-foolproof structure includes a first limiting outer wall 915 located on the outer side of the front end of the nozzle seat 91 and a first limiting inner wall 921 located on the nozzle body 92. The first limiting outer wall 915 is fitted into the first limiting inner wall 921 with a clearance fit, thereby ensuring that the nozzle seat 91 and the nozzle body 92 can only be assembled in a preset orientation. The limiting inner wall and the limiting outer wall can be elliptical in shape. Since the nozzle 9 has a cylindrical symmetrical structure, it can also be installed with a relative rotation of 180° without affecting the spray effect at the nozzle body 92 outlet.

[0039] In this embodiment, the installation orientation of the nozzle 9 and the support 100 is fixed: the nozzle seat 91 is fixed to the mounting hole 6, and a second anti-foolproof structure is provided between the nozzle seat 91 and the mounting hole 6, so that the nozzle seat 91 and the mounting hole 6 can only be inserted and fixed in a preset orientation.

[0040] The second anti-foolproof structure includes a second limiting outer wall 916 located outside the second flange 914 and a second limiting inner wall located in the mounting hole 6 of the front cover plate 1. The second limiting outer wall 916 is fitted into the second limiting inner wall with a clearance fit, so that the nozzle seat 91 and the mounting hole 6 can only be assembled in a preset position. Similarly, the nozzle seat 91 can also be installed by rotating 180°.

[0041] Specifically, each nozzle seat 91 is provided with a plurality of liquid inlet holes 911, and the plurality of liquid inlet holes 911 are arranged circumferentially around the air inlet hole 912.

[0042] Specifically, the liquid inlet 911 is a straight hole, and the center line of the liquid inlet 911 is arranged to intersect with the center line of the air inlet 912.

[0043] In this embodiment, the long strip plate has air inlet pipes 7 at both ends, connecting to the two ends of the air inlet channel 4, and the air inlet pipes 7 at both ends are staggered. Specifically, the long strip plate has liquid inlet pipes 8 at both ends, connecting to the two ends of the liquid inlet channel 5, and the liquid inlet pipes 8 at both ends are staggered. The staggered arrangement refers to the arrangement in the width direction of the long strip plate, i.e. Figure 2 The nozzles are staggered vertically as shown. During use, air / liquid enters from both ends simultaneously. The staggered arrangement prevents the gas / liquid from entering from both ends from colliding, resulting in a more uniform gas / liquid flow into each nozzle.

[0044] In the description of this utility model, it is obvious that the described embodiments are only a part of the embodiments of this utility model, and not all of them. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0045] Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0046] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A two-fluid spraying device for uniform spraying, comprising a support base (100) and a plurality of nozzles (9), wherein the support base (100) is provided with a plurality of mounting holes (6) arranged in a row, and the plurality of nozzles (9) are installed in the plurality of mounting holes (6) in a one-to-one correspondence; the support base (100) is provided with an air inlet channel (4) and a liquid inlet channel (5), characterized in that: Each nozzle (9) includes a nozzle seat (91), a nozzle body (92), and a locking member (93). The locking member (93) fixes the nozzle body (92) to the front end of the nozzle seat (91), and a first anti-foolproof structure is provided between the nozzle body (92) and the nozzle seat (91), so that the nozzle body (92) and the nozzle seat (91) can only be inserted and fixed in a preset position. The nozzle seat (91) has a liquid inlet (911) and an air inlet (912) that communicate with the nozzle body (92). The nozzle seat (91) is fixed to the mounting hole (6). A second anti-foolproof structure is provided between the nozzle seat (91) and the mounting hole (6), so that the nozzle seat (91) and the mounting hole (6) can only be inserted and fixed in a preset position. The inlet of the air inlet (912) is connected to the air intake channel (4), and the inlet of the liquid inlet (911) is connected to the liquid intake channel (5); the spray pattern of the nozzle body (92) is fan-shaped, and the spray landing line is offset by a preset angle relative to the arrangement direction of the nozzle (9).

2. The two-fluid spraying device for uniform spraying according to claim 1, characterized in that: The locking element (93) is a nut, and the front end of the nozzle seat (91) is provided with an external thread. The nut engages with the external thread to press the nozzle body (92).

3. The two-fluid spraying device for uniform spraying according to claim 2, characterized in that: The first foolproof structure includes a first limiting outer wall (915) located on the outer side of the front end of the nozzle seat (91) and a first limiting inner wall (921) located on the nozzle body (92). The first limiting outer wall (915) is embedded in the first limiting inner wall (921), thereby ensuring that the nozzle seat (91) and the nozzle body (92) can only be assembled in a preset orientation.

4. The two-fluid spraying device for uniform spraying according to claim 1, characterized in that: The support base (100) includes a front cover plate (1), a middle plate (2) and a rear cover plate (3) that are stacked and fixed in sequence. An air inlet channel (4) is formed between the rear cover plate (3) and the middle plate (2), and a liquid inlet channel (5) is formed between the front cover plate (1) and the middle plate (2). The middle plate (2) and the front cover plate (1) are provided with mounting holes (6) that are aligned one-to-one.

5. The two-fluid spraying device for uniform spraying according to claim 4, characterized in that: The inlet of the air inlet (912) is located on the rear end face of the nozzle seat (91), and the inlet of the liquid inlet (911) is located on the side of the nozzle seat (91).

6. The two-fluid spraying device for uniform spraying according to claim 5, characterized in that: Each nozzle seat (91) is provided with a plurality of liquid inlet holes (911), which are arranged circumferentially around the air inlet hole (912).

7. A two-fluid spraying device for uniform spraying according to claim 4, characterized in that: The mounting hole (6) is a stepped hole. The nozzle seat (91) is provided with a first flange (913) and a second flange (914) on the outside. The first flange (913) is embedded in the mounting hole (6) of the middle plate (2), and the second flange (914) is embedded in the mounting hole (6) of the front cover plate (1).

8. A two-fluid spraying device for uniform spraying according to claim 7, characterized in that: The second anti-foolproof structure includes a second limiting outer wall (916) located outside the second flange (914) and a second limiting inner wall located in the mounting hole (6) of the front cover plate (1). The second limiting outer wall (916) is embedded in the second limiting inner wall, so that the nozzle seat (91) and the mounting hole (6) can only be assembled in a preset orientation.

9. A two-fluid spraying device for uniform spraying according to claim 1, characterized in that: The spray landing line of the nozzle body (92) is offset by an angle of 3°~15° relative to the arrangement direction of the nozzle (9).

10. A two-fluid spraying device for uniform spraying according to claim 9, characterized in that: The spray landing line of the nozzle body (92) is offset by an angle of 5°~10° relative to the arrangement direction of the nozzle (9).

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