CN218059151U

CN218059151U - Circular air knife for high-speed tin coating machine for superfine circular welding strip and tin coating machine

Info

Publication number: CN218059151U
Application number: CN202221164214.9U
Authority: CN
Inventors: 张健; 庞永翌
Original assignee: Changzhou Jiutian New Energy Technology Co ltd
Current assignee: Changzhou Jiutian New Energy Technology Co ltd
Priority date: 2022-05-13
Filing date: 2022-05-13
Publication date: 2022-12-16
Anticipated expiration: 2032-05-13

Abstract

The utility model relates to a high-speed tin machine of scribbling in superfine circle welding strip is with circular air knife and scribble tin machine, circular air knife include the air knife body, the air knife body has the middle part cavity, the air knife body has the air intake, air intake and middle part cavity intercommunication, air knife body lower part is equipped with additional casing, the lower part cavity has been seted up at additional casing middle part, the middle part cavity intercommunication of lower part cavity and air knife body. The bottom of the additional shell is provided with a bottom plate body capable of sinking into tin liquid of a tin bath in the tin coating machine and an additional plate body positioned above the bottom plate body, and the additional plate body is provided with a plurality of through holes communicated with the lower cavity. Adopt the utility model discloses a circular air knife and tin-coating machine carry out the operation of scribbling tin to the solder strip, weld the area before circular air knife blows tin, weld the area can keep the enclosed environment with the surface of tin liquid, avoided the production of tin dross, reduce the tin dross influence of welding when taking tin-coating, promoted product quality and avoided the risk that the air knife blockked up simultaneously.

Description

Circular air knife for high-speed tin coating machine for superfine circular welding strip and tin coating machine

Technical Field

The utility model belongs to the technical field of the solder strip tin-plating technique and specifically relates to a high-speed tin-plating machine circular air knife and tin-plating machine in superfine circle solder strip.

Background

The photovoltaic solder strip is an important raw material in the welding process of the photovoltaic module, and can be divided into various types according to the performance and the application field. The interconnection welding strip mainly comprises a conventional interconnection welding strip, an MBB welding strip, a low-temperature welding strip, a low-resistance welding strip and the like; the confluence welding strip mainly comprises a conventional confluence welding strip, a punching welding strip, a black welding strip, a bending welding strip and the like. The mainstream photovoltaic solder strip product in the market at present is an MBB solder strip suitable for a multi-main-grid assembly, is thinner than a conventional solder strip, is beneficial to reducing shading of a battery piece, utilizes sunlight more effectively, improves the number of main grids, is beneficial to shortening a transverse current collecting path in the battery piece, reduces series resistance and reduces power loss of the battery. With the increase of the number of the main grid lines of the assembly, the diameter of the MBB welding strip is reduced by 30% -40% compared with the diameter of a common welding strip of 0.32/0.35mm, and under the condition of the small diameter of the welding strip, the quality requirements of the coating thickness and the concentricity of the welding strip need to be improved.

According to the traditional air knife for the MBB circular welding strip, nitrogen enters the air knife through an air inlet, and is discharged through an upper air knife edge and a lower air knife edge after tin blowing. The problems encountered at present are: the distance between the lower water plane of the air knife and the tin liquid level is about half centimeter, on one hand, the solder strip coated with the soft liquid tin coating at high temperature meets the air in the gap, so that the surface of the coating is oxidized, and the quality of the tin coating is reduced; the more serious case is: tin ash on the surface layer of the tin furnace flows to a gap between the air knife and the tin furnace due to disturbance of various factors, part of the tin ash meets a welding strip which just leaves the tin furnace and is immediately adhered to the surface of the welding strip, small tin ash passes through the circular air knife along with the welding strip and is then solidified on the surface of the welding strip to form tin nodules, and when a client side is used, hidden cracks of a battery piece are caused; tin ash with larger particles can be blocked in the central hole of the air knife, so that the air knife is blocked, and the service life of the air knife is shortened.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: provides a circular air knife for a high-speed tin-plating machine for an ultra-fine circular welding strip and the tin-plating machine, which can reduce the tin bump influence when the welding strip is plated with tin.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a high-speed circular air knife for tin coating machine in superfine circle welding area, includes the air knife body, the air knife body has the middle part cavity, the air knife body has the air intake, air intake and middle part cavity intercommunication, air knife body lower part is equipped with additional casing, the lower part cavity has been seted up at additional casing middle part, the lower part cavity communicates with the middle part cavity of air knife body. The bottom of the additional shell is provided with a bottom plate body capable of sinking in tin liquid of a tin bath in a tin coating machine and an additional plate body positioned above the bottom plate body, and the additional plate body is provided with a plurality of through holes communicated with the lower cavity.

Preferably, the additional shell and the air knife body are of an integral structure, or an additional disc body of the additional shell is connected with the bottom of the air knife body in an installing mode.

Preferably, the bottom tray body and the additional tray body are of an integral structure, or the bottom tray body is connected with the additional tray body in an installing mode.

Preferably, the air inlet includes a first air inlet and a second air inlet.

Preferably, the opening of the second air inlet is located on the surface of the side portion of the air knife body, a first avoidance groove is formed in the local portion of the air knife body, a second avoidance groove is formed in the local portion of the additional plate body, and the first avoidance groove and the second avoidance groove are combined to form an avoidance groove for installing the air inlet pipe at the second air inlet.

Preferably, the upper part of the air knife body is connected with an air knife mounting disc, the air knife mounting disc is provided with an open slot, and the open slot is locally positioned above a middle cavity of the air knife body.

A tin coating machine comprises a tin bath and the circular air knife, wherein tin liquid is filled in the tin bath, when the air knife body is arranged above the tin bath, a bottom plate body at the bottom of an additional shell is submerged in the tin liquid of the tin bath, and a plurality of through holes formed in the additional plate body are exposed out of the upper surface of the tin liquid.

The utility model has the advantages that: the utility model discloses an increase additional casing, increased the overall height of air knife, make the bottom disk body submergence of additional casing in the tin liquid of molten tin bath, set up a plurality of through-hole as the air outlet at the additional disk body, the through-hole exposes in the upper surface of tin liquid. Adopt the utility model discloses a circular air knife and tin-coating machine carry out the tinning operation to the solder strip, before the solder strip blows tin through circular air knife, the solder strip can keep the closed environment with the surface of tin liquid, both can prevent to weld the strip and oxidized under high temperature state, the tin ash and the solder strip contact on the top layer of tin liquid have also been stopped, and then the production of tin dross has been avoided, reduce the tin dross influence when welding the tin strip, the risk of air knife jam has been avoided simultaneously to the product quality has been promoted, air knife life has been improved.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic perspective view of a circular air knife of the present invention;

fig. 2 is a schematic front view of the circular air knife of the present invention;

fig. 3 is a schematic top view of the circular air knife of the present invention;

FIG. 4 is a schematic view of the installation of the circular air knife and the tin bath of the present invention;

wherein: 1. an air knife body; 101. a first air inlet; 102. a second air inlet; 103. a first avoidance slot; 2. an additional housing; 201. a through hole; 202. a second avoidance slot; 3. an air knife mounting plate.

Detailed Description

The present invention will now be described in further detail with reference to the drawings and preferred embodiments. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1, 2 and 3, a circular air knife for a superfine circular welding strip high-speed tin coating machine comprises an air knife body 1, wherein the air knife body 1 is provided with a middle cavity, the air knife body 1 is provided with an air inlet, the air inlet is communicated with the middle cavity, an additional shell 2 is arranged at the lower part of the air knife body 1, a lower cavity is arranged at the middle part of the additional shell 2, and the lower cavity is communicated with the middle cavity of the air knife body 1. The bottom of the additional shell 2 is provided with a bottom plate body capable of sinking into tin liquid of a tin bath in the tin coating machine and an additional plate body positioned above the bottom plate body, and the additional plate body is provided with a plurality of through holes 201 communicated with the lower cavity.

Preferably, the additional housing 2 and the air knife body 1 are of an integral structure, or an additional disc body of the additional housing 2 is connected with the bottom of the air knife body 1. The bottom plate body and the additional plate body are of an integral structure, or the bottom plate body is connected with the additional plate body in an installing mode.

Preferably, the air inlet includes a first air inlet 101 and a second air inlet 102. The first air inlet 101 and the second air inlet 102 can be connected with a high-pressure nitrogen inlet pipe. The opening of the first air inlet 101 is located on the upper surface of the air knife body 1. The opening of the second air inlet 102 is located on the lateral surface of the air knife body 1, a first avoidance groove 103 is formed in part of the air knife body 1, a second avoidance groove 202 is formed in part of the additional disc body, and the first avoidance groove 103 and the second avoidance groove 202 are combined to form an avoidance groove for installing an air inlet pipe at the second air inlet 102.

Preferably, the air knife mounting plate 3 is connected to the upper portion of the air knife body 1, the air knife mounting plate 3 is provided with an open slot, and the open slot is locally located above a middle cavity of the air knife body 1.

As shown in fig. 4, a tin coating machine includes a tin bath 4 and the above circular air knife, wherein tin liquid 5 is contained in the tin bath 4, when the air knife body 1 is installed above the tin bath 4, the bottom plate body at the bottom of the additional shell 2 is submerged in the tin liquid 5 in the tin bath 4, and a plurality of through holes 201 formed in the additional plate body are exposed out of the upper surface of the tin liquid 5.

The utility model discloses an increase additional casing 2, increased the overall height of air knife, make the bottom disk body submergence of additional casing 2 in tin liquid 5 of molten tin bath 4, set up a plurality of through-hole 201 as the air outlet at the additional disk body, through-hole 201 exposes in tin liquid 5's upper surface, and the first air intake 101 of air knife, second air intake 102 position and original conventional design remain unchanged.

Adopt the utility model discloses a circular air knife and tin-coating machine carry out the tinning operation to the solder strip, before the solder strip blows tin through circular air knife, the solder strip can keep the closed environment with tin liquid 5's surface, both can prevent to weld the strip and oxidized under high temperature state, the tin ash on tin liquid 5's top layer has also been stopped with the contact of solder strip, and then the production of "tin dross" has been avoided, reduce the tin dross influence when welding the strip and scribbling tin, the risk of air knife jam has been avoided simultaneously to product quality has been promoted, air knife life has been improved.

While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims

1. The utility model provides a high-speed tin machine that scribbles of superfine circle solder strip circular air knife which characterized in that: including air knife body (1), air knife body (1) has the middle part cavity, air knife body (1) has the air intake, air intake and middle part cavity intercommunication, air knife body (1) lower part is equipped with additional casing (2), the lower part cavity has been seted up at additional casing (2) middle part, the middle part cavity intercommunication of lower part cavity and air knife body (1), additional casing (2) bottom has the bottom disk body that can sink in the tin bath of scribbling the tin machine and is located the additional disk body of bottom disk body top, through-hole (201) of a plurality of and lower part cavity intercommunication are seted up to the additional disk body.

2. The circular air knife for the superfine circular welding strip high-speed tin coating machine according to claim 1, which is characterized in that: the additional shell (2) and the air knife body (1) are of an integral structure, or an additional disc body of the additional shell (2) is installed and connected with the bottom of the air knife body (1).

3. The circular air knife for the superfine circular welding strip high-speed tin coating machine according to claim 1, which is characterized in that: the bottom tray body and the additional tray body are of an integral structure, or the bottom tray body is connected with the additional tray body in an installing mode.

4. The circular air knife for the superfine circular welding strip high-speed tin coating machine according to claim 1, which is characterized in that: the air inlet comprises a first air inlet (101) and a second air inlet (102).

5. The circular air knife for the high-speed tin coating machine for the superfine circular welding strip according to claim 4, characterized in that: the opening of second air intake (102) is located the lateral part surface of air knife body (1), first groove (103) of dodging is seted up in air knife body (1) part, the second groove (202) of dodging is seted up in additional disk body part, first groove (103) of dodging and second groove (202) of dodging combine to form the groove of dodging that is used for installing second air intake (102) department air-supply line.

6. The circular air knife for the superfine circular welding strip high-speed tin coating machine according to claim 1, which is characterized in that: the air knife is characterized in that the upper portion of the air knife body (1) is connected with an air knife mounting disc (3), the air knife mounting disc (3) is provided with an open slot, and the part of the open slot is located above a middle cavity of the air knife body (1).

7. A tin coating machine is characterized in that: the air knife comprises a tin bath (4) and the circular air knife as claimed in any one of claims 1 to 6, wherein tin liquid (5) is filled in the tin bath (4), when the air knife body (1) is installed above the tin bath (4), a bottom plate body at the bottom of the additional shell (2) is submerged in the tin liquid (5) in the tin bath (4), and a plurality of through holes (201) formed in the additional plate body are exposed out of the upper surface of the tin liquid (5).