CN214361628U

CN214361628U - Novel air knife for tin coating of solder strip

Info

Publication number: CN214361628U
Application number: CN202120438375.1U
Authority: CN
Inventors: 刘辉; 刘勇; 黄文飞
Original assignee: Kunshan Aotelai Electromechanical Technology Co ltd
Current assignee: Kunshan Aotelai Electromechanical Technology Co ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2021-10-08
Anticipated expiration: 2031-03-01

Abstract

The utility model relates to a novel solder strip tin-coated air knife, it includes: the outer sleeve wraps the periphery of the inner core, a gas storage pressurizing cavity is formed between the outer sleeve and the inner core, an annular gas outlet gap is formed between the lower end of the outer sleeve and the lower end of the inner core, the gas outlet gap is communicated with the lower end of the gas storage pressurizing cavity, the gas outlet gap is provided with a narrowing part and an expanding part arranged at the lower end of the narrowing part, a line passing channel is arranged in the inner core, and the line passing channel penetrates through the upper end and the lower end of the inner core. The air outlet gap is provided with a narrowed part and an enlarged part arranged at the lower end of the narrowed part, so that the air flow is accelerated when leaving the narrowed part and entering the enlarged part, the pressure of the compressed air is more effectively utilized, and higher-speed air flow is obtained under the same air pressure input condition.

Description

Novel air knife for tin coating of solder strip

Technical Field

The utility model relates to an air knife, in particular to novel solder strip tin-plating air knife.

Background

At present, a tin-coated copper strip (hereinafter referred to as a solder strip) for a solar module is coated with tin by a hot dip coating process, a copper wire enters a tin furnace from one end, is vertically pulled out after passing through a wire guide wheel, then passes through an annular air knife, and compressed gas is uniformly blown out by the annular air knife to uniformly blow off tin on the surface of a round copper wire, and the thickness of the tin layer on the surface of the round copper wire is accurately controlled by a compressed gas flow valve.

At present, most of annular air knife structures are cylindrical, the most of annular air knife structures are about 60mm in outer diameter, and inner holes are 3-5mm in diameter. Because the outer diameter of the air knife opening is larger, the circular line is difficult to observe, the oblique angle is smaller, the air consumption is larger, the tin layer can be blown off only when the air knife opening is very close to a tin furnace, and the problems of difficult observation, difficult cleaning and the like exist. In the prior art, most of the annular air knives adopt a left-right air inlet mode, which can generate the defects of air flow disorder, air pressure consumption, air consumption increase and the like. Improvements are therefore needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel solder strip tin-coated air knife has solved how to more effectively utilize compressed air pressure's problem.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

the utility model provides a novel solder strip tin-coated air knife, it includes: the outer sleeve wraps the periphery of the inner core, a gas storage pressurizing cavity is formed between the outer sleeve and the inner core, an annular gas outlet gap is formed between the lower end of the outer sleeve and the lower end of the inner core, the gas outlet gap is communicated with the lower end of the gas storage pressurizing cavity, the gas outlet gap is provided with a narrowing part and an expanding part arranged at the lower end of the narrowing part, a line passing channel is arranged in the inner core, and the line passing channel penetrates through the upper end and the lower end of the inner core.

Preferably, the lower ends of the outer sleeve and the inner core are both internally contracted.

Preferably, an air inlet channel is further formed in the inner core, the air inlet channel extends downwards from the upper end of the inner core, and the lower end of the air inlet channel is communicated with the air storage and pressurization cavity.

Furthermore, the number of the air inlet channels is two, and the two air inlet channels are symmetrically arranged relative to the wire passing channel.

Preferably, the horizontal cross-sectional area of the lower side part of the air storage and pressurization cavity is reduced in the direction from top to bottom.

Preferably, the upper end of the inner core extends radially outwards to form a flange plate, and the flange plate covers the upper end face of the outer sleeve.

Furthermore, a sealing gasket is arranged between the flange plate and the upper end face of the outer sleeve.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

the utility model discloses a novel solder strip tin-coated air knife, because set up the air knife into overcoat and inner core, cross the line passageway of seting up in through the inner core and scribble the tin copper line and flow through, introduce gas storage pressure boost chamber through inlet channel with compressed gas, then compressed gas gets into the clearance of giving vent to anger, and the clearance of giving vent to anger has the narrowing part and sets up the expansion part at narrowing part lower extreme, make the air current accelerate when leaving the narrowing part and getting into the expansion part, compressed air's pressure has more effectively been utilized, obtain faster-speed air current under same atmospheric pressure input condition.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a top view of a novel solder strip tin-coating air knife according to a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is an enlarged view at B of FIG. 2;

wherein the reference numerals are as follows:

1. a jacket;

2. an inner core; 21. a wire passage; 22. an air intake passage; 23. a flange plate;

3. the gas storage pressurizing cavity;

4. an air outlet gap; 41. a narrowed portion; 42. an enlarged portion.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

The novel air knife for coating tin on the solder strip as shown in figures 1 and 2 comprises an outer sleeve 1 and an inner core 2. The outer sheath 1 is wrapped around the outer periphery of the inner core 2. A wire passing channel 21 is arranged in the inner core 2, and the wire passing channel 21 is used for the welding strip to flow through from bottom to top.

As shown in fig. 2, an air storage and pressurization cavity 3 is formed between the outer sleeve 1 and the inner core 2. Two air inlet channels 22 are arranged in the inner core 2, and the air inlet channels 22 are connected with an air supply connector (not shown) and connected with a compressed air source through the air supply connector. The lower end of the air inlet channel 22 is communicated with the air storage pressurizing cavity 3. An annular air outlet gap 4 is formed between the lower end of the outer sleeve 1 and the lower end of the inner core 2. The lower end of the air outlet gap 4 is an annular horn opening ring (see figure 3), and the upper end of the air outlet gap 4 is communicated with the air storage pressurizing cavity 3. The lower end of the inner core 2 and the lower end of the outer sleeve 1 are both internally contracted. As shown in fig. 3, the outlet gap 4 includes a narrowed portion 41 and an enlarged portion 42, and is similar to a laval nozzle structure, wherein the upper half of the outlet gap 4 is narrowed from a large size to a middle to form the narrowed portion 41, and then the narrowed portion is expanded from a small size to a bottom to form the enlarged portion 42. This structure allows the velocity of the gas flow to be varied by varying the cross-sectional area of the nozzle. The gas storage and pressurization cavity 3 (see fig. 2) provides a quick release pressure region for the compressed gas to accelerate the gas flow. When the compressed gas enters the air outlet gap 4, the compressed gas is pressurized through the narrow throat, then the compressed gas enters the expanding part 42, the speed of the gas flow is increased again, and the Laval principle is utilized to obtain higher-speed gas flow under the condition of the same air pressure input. The outer peripheral surface of the bottom of the outer sleeve 1 is of a whole contraction structure, and the wire condition can be observed conveniently.

The wire passing channel 21 penetrates through the upper end and the lower end of the inner core 2 (the outer sleeve 1 is provided with a corresponding opening for allowing wires to flow into the wire passing channel 21), and the lower end of the air outlet gap 4 surrounds the opening at the lower end of the wire passing channel 21. Therefore, when the tinned copper wire flows through the wire passing channel 21 from bottom to top, the compressed gas sequentially passes through the gas inlet channel 22, the gas storage pressurization cavity 3 and the gas outlet gap 4 and is blown downwards to the periphery of the tinned copper wire. The compressed gas is blown downwards at the periphery of the tinned copper wire, and the general flow direction of the gas flow is not changed, so that the pressure loss of the compressed gas is reduced. The tin-coated copper wire is controlled in tin-coated thickness by blowing, an oxide layer on the surface of the copper wire can be removed, and the copper wire (and a cooling surface layer) can be cooled.

In this case, as shown in fig. 2, two air inlet channels 22 are provided, and are symmetrically arranged with respect to the line passing channel 21, which is beneficial to make the annular wind blown out from the lower annular opening of the air outlet gap 4 more uniform.

In this embodiment, the horizontal cross-sectional area of the lower portion of the gas storage and pressurization cavity 3 decreases from top to bottom, so that the compressed gas is pressurized into the gas outlet gap 4 during the downward movement, and the flow rate is increased after the gas flow passes through the narrowed portion 41 of the gas outlet gap 4. The method can realize that the solder strip tin-coating air knife and a tin furnace (not shown) are separated by a larger distance, and the peripheral tin layer which is not completely cooled on the surface of the copper wire can be effectively removed, so that a larger view is provided for conveniently observing the condition of the copper wire.

As shown in fig. 2, the upper end of the inner core 2 extends radially outwardly to form a flange plate 23. The flange plate 23 covers the upper end face of the outer sleeve 1, and the flange plate 23 is connected with the outer sleeve 1 through bolts (see fig. 1). The flange plate 23 is arranged to facilitate the connection between the outer sleeve 1 and the inner core 2. To improve the tightness, a sealing gasket (not shown) is provided between the flange plate 23 and the upper end face of the outer sleeve 1.

In summary, the air knife for tin-coating solder strip of this embodiment has the narrowed portion 41 and the enlarged portion 42 in the air outlet gap 4, so that the flow rate of the compressed air entering the enlarged portion 42 from the narrowed portion 41 is increased, a higher flow rate is obtained under the same air pressure input condition, and the pressure of the compressed air is utilized more effectively.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a novel solder strip tin-plating air knife which characterized in that, it includes: overcoat (1) and inner core (2), overcoat (1) wrap up in inner core (2) periphery, overcoat (1) with form gas storage pressure boost chamber (3) between inner core (2), overcoat (1) lower extreme with form annular gap (4) of giving vent to anger between inner core (2) the lower extreme, give vent to anger gap (4) with gas storage pressure boost chamber (3) lower extreme is linked together, it has narrowing portion (41) and sets up to give vent to anger gap (4) the enlargement portion (42) of narrowing portion (41) lower extreme, it crosses line channel (21) to have seted up in inner core (2), it runs through to cross line channel (21) both ends about inner core (2).

2. The novel air knife for tin coating of the solder strip according to claim 1, characterized in that: the lower ends of the outer sleeve (1) and the inner core (2) are both retracted.

3. The novel air knife for tin coating of the solder strip according to claim 1, characterized in that: an air inlet channel (22) is further formed in the inner core (2), the air inlet channel (22) extends downwards from the upper end of the inner core (2), and the lower end of the air inlet channel (22) is communicated with the air storage pressurization cavity (3).

4. The novel air knife for tin coating of solder strip according to claim 3, characterized in that: the number of the air inlet channels (22) is two, and the two air inlet channels (22) are symmetrically arranged relative to the wire passing channel (21).

5. The novel air knife for tin coating of the solder strip according to claim 1, characterized in that: the horizontal cross-sectional area of the lower side part of the gas storage and pressurization cavity (3) is reduced in the direction from top to bottom.

6. The novel air knife for tin coating of the solder strip according to claim 1, characterized in that: the upper end of the inner core (2) extends outwards in the radial direction to form a flange plate (23), and the flange plate (23) covers the upper end face of the outer sleeve (1).

7. The novel air knife for tin coating of the solder strip according to claim 6, characterized in that: and a sealing gasket (5) is arranged between the flange plate (23) and the upper end face of the outer sleeve (1).