CN218939321U

CN218939321U - Production device of nano silver paste for solar cell

Info

Publication number: CN218939321U
Application number: CN202223514173.4U
Authority: CN
Inventors: 竹文坤; 何嵘; 陈涛; 廖亚琴; 杨红
Original assignee: Southwest University of Science and Technology
Current assignee: Southwest University of Science and Technology
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-04-28
Anticipated expiration: 2032-12-28

Abstract

The utility model discloses a production device of nano silver paste for a solar cell, which comprises a frame, wherein the frame comprises a square cabin, a reaction cavity is fixedly arranged on one side of the square cabin, a stirring mechanism is rotationally connected in the reaction cavity, the top end of the stirring mechanism is fixedly connected with a driving device, the stirring mechanism comprises a stirring shaft, and a turbine impeller is arranged on the stirring shaft; the inner wall of the reaction cavity is fixedly provided with a flow guide baffle plate which is arranged above or below the turbine impeller; the reaction chamber is provided with an ultrasonic generator which is inserted into the side wall of the reaction chamber. According to the device, through the structural design of the turbine impeller and the flow guide baffle, the nano silver paste can be effectively stirred by high-strength shearing force, and the nano silver paste is matched with the ultrasonic generator, so that the dispersion of nano particles in a medium is promoted, and the production efficiency of the nano silver paste is improved.

Description

Production device of nano silver paste for solar cell

Technical Field

The utility model relates to the technical field of nano silver paste preparation equipment, in particular to a production device of nano silver paste for a solar cell.

Background

The nano silver paste is conductive silver paste with nano-scale particle size of metal silver particles, is widely used for solar panel electrodes, and is thick paste of a mechanical mixture consisting of high-purity nano silver, an adhesive, a solvent and an auxiliary agent.

The small-size nano silver particles are extremely easy to agglomerate due to the volume effect and the surface effect, so that the melting among particles and the surface oxidation are serious, and the nano silver particles cannot be redispersed to the nano size in the size mixing process, so that various performances of the nano silver paste are seriously influenced.

The common methods for physically dispersing the nano particles include a mechanical dispersion method and an ultrasonic dispersion method, wherein the mechanical dispersion method is mainly used for promoting the dispersion of the nano particles in a medium by stirring or high-speed shearing and the ultrasonic dispersion method is mainly used for achieving the dispersion of the nano particles by the crushing effect of shock waves and microjet generated by ultrasonic cavitation of ultrasonic waves.

Chinese patent CN207137909U is a novel nano silver paste manufacturing machine and Chinese patent CN207239156U is a large-scale production device of nano silver paste, and ultrasonic processors are designed, which are combined with ultrasonic treatment through mechanical stirring in the paste mixing process, so that nano silver particles are effectively dispersed, and the agglomeration phenomenon is avoided. However, in the above patent, the stirring mechanism adopts a conventional blade structure or a combination of mechanical stirring and ultrasonic treatment, so that the dispersing and shearing effects are not ideal and the shearing force is very limited.

Disclosure of Invention

Based on the above problems, there is an urgent need for a device for producing and dispersing nano silver paste with a strong shearing effect, so as to improve the yield of nano silver paste products.

It is an object of the present utility model to address at least the above problems and/or disadvantages and to provide at least the advantages described below.

To achieve these objects and other advantages and in accordance with the purpose of the utility model, there is provided a device for producing nano silver paste for solar cells, comprising a frame including a square chamber, a reaction chamber is fixedly installed at one side of the square chamber, a stirring mechanism is rotatably connected in the reaction chamber, and a driving device is fixedly connected to the top end of the stirring mechanism, wherein:

the stirring mechanism comprises a stirring shaft, and a turbine impeller is arranged on the stirring shaft; the inner wall of the reaction cavity is fixedly provided with a flow guide baffle plate which is arranged above or below the turbine impeller; the reaction chamber is provided with an ultrasonic generator which is inserted into the side wall of the reaction chamber.

Preferably, the turbine impeller comprises a wheel disc and 3-6 straight stirring blades, wherein the wheel disc is fixedly connected to a stirring shaft, and the stirring blades are fixedly connected to the wheel disc.

Preferably, the wheel disc is uniformly provided with a plurality of first diversion holes.

Preferably, the flow guide baffle is integrally in a ring shape and comprises a baffle main body and a plurality of reinforcing plates, wherein the baffle main body is welded on the inner wall of the reaction cavity, and the reinforcing plates are circumferentially and uniformly arranged at the upper end and the lower end of the baffle.

Preferably, a plurality of second diversion holes are uniformly distributed on the baffle main body.

Preferably, the reaction cavity comprises a cavity, and a feed port and a discharge port are respectively arranged at the top end and the bottom end of the cavity.

Preferably, the driving device comprises a motor, the motor is connected with a speed reducer through a belt pulley or a transmission gear, an output shaft of the speed reducer is fixedly connected with a coupler, the lower end of the coupler is fixedly connected with the stirring shaft, the motor is configured in the square cabin, the speed reducer is configured at the top end of the frame, the top end of the reaction cavity further comprises a supporting frame, and the coupler is accommodated in the supporting frame.

The utility model at least comprises the following beneficial effects:

compared with the prior art, the production device of the nano silver paste for the solar cell can effectively stir the nano silver paste by high-strength shearing force through the structural design of the turbine impeller and the flow guide baffle, and is matched with the ultrasonic generator, so that the dispersion of nano particles in a medium is promoted, and the production efficiency of the nano silver paste is improved.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a turbine wheel according to the present utility model;

fig. 3 is a schematic view of a baffle structure according to the present utility model.

Detailed Description

The present utility model is described in further detail below with reference to the drawings to enable those skilled in the art to practice the utility model by referring to the description.

It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

It should be noted that, in the description of the present utility model, the orientation or positional relationship indicated by the term is based on the orientation or positional relationship shown in the drawings, which are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, may be a detachable connection, or may be integrally connected, may be mechanically connected, may be electrically connected, may be directly connected, may be indirectly connected through an intermediate medium, may be communication between two members, and may be understood in a specific manner by those skilled in the art.

Furthermore, in the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be a direct contact of the first and second features, or an indirect contact of the first and second features through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

The novel experimental model is described in detail below with reference to fig. 1-3:

a production device of nano silver paste for a solar cell, comprising:

frame 1, it includes square cabin 2, one side fixed mounting in square cabin 2 has reaction chamber 3, reaction chamber 3 internal rotation is connected with rabbling mechanism 4, the top fixedly connected with drive arrangement 5 of rabbling mechanism 4, wherein:

the stirring mechanism 4 comprises a stirring shaft 41, and a turbine impeller 42 is arranged on the stirring shaft 41; a guide baffle 43 is fixedly arranged on the inner wall of the reaction cavity 3, and the guide baffle 43 is arranged above or below the turbine impeller 42; the reaction chamber 3 is provided with an ultrasonic generator 6, and the ultrasonic generator 6 is inserted into the side wall of the reaction chamber 3.

Working principle:

the turbine impeller 42 is used as radial stirring slurry, strong shearing force is generated when the nano silver slurry is stirred, the turbine impeller 42 is used as the stirring slurry, and the flow guide baffle 43 is arranged above or below the turbine impeller 42, so that in the stirring process, under the action of a driving device, the stirring shaft 41 rotates, the turbine impeller 42 stirs and shears the nano silver slurry, the nano silver slurry impacts the cavity wall of the reaction cavity 3 under the action of strong radial force of the turbine impeller 42, after contacting with the cavity wall, the nano silver slurry moves upwards and downwards along the cavity wall, and contacts with the flow guide baffle 43 to generate strong friction to further shear the nano silver slurry, and under the synergistic effect of the turbine impeller 42 and the flow guide baffle 43, even if the rotating speed is unchanged, the shearing force of the device can still be effectively promoted, and the nano silver slurry is matched with the ultrasonic generator 5 to promote the dispersion of nano particles in the slurry. The ultrasonic generator 5 is an ultrasonic vibration rod, the front end of the ultrasonic vibration rod stretches into the reaction cavity 3, and a flange pipe orifice matched with the ultrasonic generator 5 is arranged on the reaction cavity 3 and used for fixing the ultrasonic generator 5.

In the above technical solution, the stirring mechanism 4 includes two turbine impellers 42, the turbine impellers 42 include a wheel disc 421 and 6 straight stirring blades 422, the wheel disc 421 is fixed on the stirring shaft 41 by a screw sleeve, and the stirring blades 422 are fixedly disposed on the wheel disc 421 by welding. The number of turbine impellers 42 is increased or reduced according to the volume of the reaction chamber 3 and the stirring requirement, and the wheel disc 421 is fixed on the stirring shaft 41 through a screw sleeve to facilitate replacement of damaged wheel discs or stirring blades.

In the above technical scheme, the flow guide baffle 43 is integrally in a ring shape, and comprises a baffle main body 431 and a plurality of reinforcing plates 432, the baffle main body 431 is welded on the inner wall of the reaction chamber 3, the reinforcing plates 432 are circumferentially and uniformly arranged at the upper end and the lower end of the baffle main body 431, and the end parts of the reinforcing plates 432 are welded on the inner wall of the reaction chamber 3. In this way, the baffle body 431 is further stabilized by the reinforcing plate 432, so that the baffle body 431 is prevented from being deformed under the impact of nano silver paste, and the service life of the device is prolonged.

In the above technical solution, the wheel disc 421 is uniformly provided with a plurality of first diversion holes 423, and the baffle main body 431 is uniformly provided with a plurality of second diversion holes 433. In this way, strong friction is generated when the nano silver paste passes through the edges of the first deflector hole 423 and the second deflector hole 433, so that the shearing action on the nano silver paste is improved, and meanwhile, the flowing speed of the nano silver paste in the reaction cavity 3 is improved.

In the above technical scheme, the reaction chamber 3 includes a cavity, and a feed inlet 31 and a discharge outlet 32 are respectively disposed at the top and bottom ends of the cavity. The nano silver paste is discharged from the feed inlet, and is discharged from the discharge opening to the reaction cavity after being mixed.

In the above technical scheme, the driving device 5 includes a motor 51, the motor 51 is connected with a speed reducer 52 through a belt pulley, an output shaft of the speed reducer 52 is fixedly connected with a coupler 53, a lower end of the coupler 53 is fixedly connected with the stirring shaft, the motor 51 is configured in the square cabin 2, the speed reducer 52 is configured at the top end of the frame 1, the top end of the reaction chamber 3 further includes a supporting frame 54, and the coupler is accommodated in the supporting frame 54.

Although embodiments of the present utility model have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the utility model would be readily apparent to those skilled in the art, and accordingly, the utility model is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims

1. The utility model provides a solar cell is with apparatus for producing of nanometer silver thick liquid, includes the frame, and it includes square cabin, one side fixed mounting in square cabin has the reaction chamber, the reaction chamber swivelling joint has rabbling mechanism, rabbling mechanism's top fixedly connected with drive arrangement, its characterized in that:

2. The device for producing nano silver paste for solar cells according to claim 1, wherein the turbine impeller comprises a wheel disc and 3-6 straight stirring blades, wherein the wheel disc is fixedly connected to a stirring shaft, and the stirring blades are fixedly connected to the wheel disc.

3. The apparatus for producing nano-silver paste for solar cells according to claim 2, wherein the wheel disc is uniformly provided with a plurality of first guide holes.

4. The device for producing nano-silver paste for solar cells according to claim 1, wherein the flow guide baffle is in a circular ring shape, and comprises a baffle body and a plurality of reinforcing plates, wherein the baffle body is welded on the inner wall of the reaction chamber, and the reinforcing plates are circumferentially and uniformly arranged at the upper end and the lower end of the baffle.

5. The apparatus for producing nano-silver paste for solar cells according to claim 4, wherein a plurality of second guide holes are uniformly formed in the baffle body.

6. The device for producing nano-silver paste for solar cells according to claim 1, wherein the reaction chamber comprises a chamber body, and a feed port and a discharge port are respectively arranged at the top end and the bottom end of the chamber body.

7. The device for producing nano silver paste for solar cells according to claim 1, wherein the driving device comprises a motor, the motor is connected with a speed reducer through a belt pulley or a transmission gear, an output shaft of the speed reducer is fixedly connected with a coupler, the lower end of the coupler is fixedly connected with the stirring shaft, the motor is arranged in the square cabin, the speed reducer is arranged at the top end of the frame, the top end of the reaction cavity further comprises a support frame, and the coupler is accommodated in the support frame.