Double-layer flow uniformizing plate

Abstract

The utility model provides a double-layer flow uniformizing plate which comprises an outer frame, a first flow uniformizing plate and a second flow uniformizing plate, the first flow uniformizing plate is located on the upper layer of the second flow uniformizing plate in the outer frame, the first flow uniformizing plate is divided into advection sections and a wave flow section, the wave flow section is located between the two advection sections and is in a uniform continuous arc shape, and the arc-shaped protruding portion of the wave flow section faces the second flow uniformizing plate. The face, opposite to the first flow uniformizing plate, of the second flow uniformizing plate is in a uniform continuous arc shape, the arc-shaped protruding portion of the second flow uniformizing plate faces the first flow uniformizing plate, and a plurality of flow uniformizing holes are formed in the first flow uniformizing plate and the second flow uniformizing plate. The flow uniformizing plate is of a double-layer plate body structure, the structure and bubble dispersion of an existing flow uniformizing plate are optimized, the double-layer structure can weaken the impact force generated when liquid medicine directly rushes upwards from the bottom, meanwhile, dispersion of water flow bubbles from the middle to the areas on the two sides is accelerated, and liquid dispersion is achieved; the condition that the uniformity difference between the middle area and the two side areas is obvious is improved, and the overall uniformity effect is further improved.

Description

Technical Field

[0001] The utility model relates to the photovoltaic field, in particular to a double-layer flow-distributing plate. Background Art

[0002] The preparation process of photovoltaic cells includes cleaning, texturing, diffusion, etching / PSG removal, PECVD, screen printing, sintering and other steps. Among them, a trough machine is required in the texturing process, including main and auxiliary troughs, circulation pumps, online heating rods, circulation tanks, bubbling tubes, flow equalizers and other structures. The flow equalizer is installed at the bottom of the trough to play a role in the uniform dispersion of liquid circulation, which has an impact on the uniformity of the velvet surface. However, the existing flow equalizer is a flat single-plate structure. When the liquid circulates, it bubbles and impacts from the bottom to the top. The bubbles are large and the impact force is strong. In addition, there is a common situation that the uniformity of the middle area and the two sides is obviously different, with the middle area being strong and the two sides being weak. Utility Model Content

[0003] In view of the above, the utility model provides a double-layer flow equalizer plate, which optimizes the structure and bubble dispersion of the flow equalizer plate, so that the circulation of the chemical solution is more uniform during the texturing process, and the silicon wafers in various areas at the bottom of the trough body react more fully with the chemical solution, thereby improving the overall uniformity of the texturing surface.

[0004] The utility model adopts the following technical scheme: a double-layer flow equalizer plate, comprising an outer frame and a first flow equalizer plate and a second flow equalizer plate arranged in the outer frame, wherein the first flow equalizer plate is located on the upper layer of the second flow equalizer plate in the outer frame, the first flow equalizer plate is divided into two flat flow sections and a wave flow section, the wave flow section is located between the two flat flow sections, the wave flow section is a uniform and continuous arc, the arc-shaped convex part of the wave flow section faces the second flow equalizer plate, the second flow equalizer plate is a uniform and continuous arc on one side relative to the first flow equalizer plate, the arc-shaped convex part of the second flow equalizer plate faces the first flow equalizer plate, and a plurality of flow equalizer holes are provided on both the first flow equalizer plate and the second flow equalizer plate.

[0005] As a further improved technical solution of the utility model, the flow equalizing holes are arranged in a row, and the flow equalizing holes on the first flow equalizing plate correspond one by one to the flow equalizing holes on the second flow equalizing plate.

[0006] As a further improved technical solution of the present invention, the aperture of the flow-uniform holes on the first flow-uniform plate is smaller than the aperture of the flow-uniform holes on the second flow-uniform plate.

[0007] As a further improved technical solution of the utility model, a uniform flow hole is provided in the arc-shaped middle part of the wave flow section.

[0008] As a further improved technical solution of the present invention, flow equalizing holes are provided in the arc-shaped middle part and the arc-shaped connection part of the second flow equalizing plate.

[0009] As a further improved technical solution of the utility model, a side of the second flow equalizer plate away from the first flow equalizer plate is a plane, and the upper and lower surfaces of the flat flow section of the first flow equalizer plate are both planes.

[0010] As a further improved technical solution of the utility model, the outer frame and the first flow equalizer plate and the second flow equalizer plate are sealed around.

[0011] As a further improved technical solution of the utility model, the horizontal flow section and the wave flow section each occupy one third of the first flow equalizer.

[0012] The flow equalizer plate of the utility model has a double-layer plate structure. The first flow equalizer plate on the upper layer is designed as a three-section structure of a horizontal flow section, a wave flow section, and a horizontal flow section. The upper surface of the second flow equalizer plate on the lower layer is designed with a full continuous arc shape, and the arc of the second flow equalizer plate is opposite to the arc convex part of the wave flow section of the first flow equalizer plate. The aperture of the flow equalizer hole on the first flow equalizer plate is smaller than that of the flow equalizer hole on the second flow equalizer plate. Such a double-layer structure can weaken the impact force of the entire medicine liquid rushing upward from the bottom, and at the same time accelerate the dispersion of water bubbles from the middle to the two side areas, thereby dispersing the liquid and improving the situation where the uniformity difference between the middle area and the two side areas is obvious, thereby improving the overall uniformity effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the double-layer flow-distributing plate of the utility model.

[0014] Figure 2 It is a plan view of the first flow equalizer of the utility model.

[0015] Figure 3 It is a plan view of the second flow equalizer of the utility model.

[0016] Figure 4 Schematic diagram of the positional relationship between the first flow homogenizer and the second flow homogenizer.

[0017] Figure 5 Schematic diagram of the position relationship of the flow holes of the first flow equalizer plate and the second flow equalizer plate. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0019] Reference Figure 1-Figure 4A double-layer flow equalizer plate of the present embodiment comprises an outer frame 1 and a first flow equalizer plate 2 and a second flow equalizer plate 3 arranged in the outer frame 1. The outer frame 1 and the first flow equalizer plate 2 and the second flow equalizer plate 3 are sealed on all sides. The first flow equalizer plate 2 is located on the upper layer of the second flow equalizer plate 3 in the outer frame 1. The first flow equalizer plate 2 is divided into two flat flow sections 21 and one wave flow section 22. The wave flow section 22 is located between the two flat flow sections 21. The two flat flow sections 21 and one wave flow section 22 each occupy one third of the first flow equalizer plate 2. The wave flow section 22 is a uniform and continuous arc. The arc-shaped convex part of the wave flow section 22 faces the second flow equalizer plate 3. The side of the second flow equalizer plate 3 opposite to the first flow equalizer plate 2 is a uniform and continuous arc. The arc-shaped convex part of the second flow equalizer plate 3 faces the first flow equalizer plate 2. The side of the second flow equalizer plate 3 away from the first flow equalizer plate 2 is a plane. The upper and lower surfaces of the flat flow section 21 of the first flow equalizer plate 2 are both planes.

[0020] Further integration Figure 1-Figure 5 , a number of flow holes 4 are provided on both the first flow equalizer plate 2 and the second flow equalizer plate 3. The flow holes 4 are circular holes, arranged in rows, and arranged adjacently and staggered. The flow holes on the first flow equalizer plate 2 correspond one to one to the flow holes on the second flow equalizer plate 3. In order to better distinguish the description, the flow holes on the first flow equalizer plate 2 are defined as first flow equalizer holes 41, and the flow equalizer holes on the second flow equalizer plate 3 are defined as second flow equalizer holes 42. For the first flow equalizer plate 2, the first flow equalizer holes 41 are evenly spaced and arranged in rows on the horizontal flow section 21. In the wave flow section 22, the first flow equalizer holes 41 are evenly spaced and arranged in the middle of the arc. A row of first flow equalizer holes 41 is also provided at the junction of the horizontal flow section 21 and the wave flow section 22. For the second flow equalizer plate 3, the second flow equalizer holes 42 are evenly spaced and arranged in the middle of the arc and at the connection of the arc.

[0021] The first flow-uniform holes 41 on the first flow-uniform plate 2 have the same aperture, and the second flow-uniform holes 42 on the second flow-uniform plate 3 have the same aperture. The aperture of the first flow-uniform hole 41 is smaller than the aperture of the second flow-uniform hole 42. In this embodiment, the aperture of the first flow-uniform hole 41 is 0.4 cm, and the aperture of the second flow-uniform hole 42 is 0.5 cm.

[0022] Since the liquid medicine is constantly bubbling and circulating upward in the cashmere making tank, the double-layer flow uniform plate of the present application can weaken the impact force of the entire liquid medicine rushing upward from the bottom. In addition, the first flow uniform plate is designed as a three-section structure of a horizontal flow section, a wave flow section, and a horizontal flow section. The arc of the second flow uniform plate 3 is arranged opposite to the arc-shaped convex part of the wave flow section 22 of the first flow uniform plate 2. The aperture of the first flow uniform hole 41 is smaller than the aperture of the second flow uniform hole 42. This can further weaken the water bubbles rushing upward, and at the same time accelerate the dispersion of the water bubbles from the middle to the two side areas, thereby achieving the effect of improving the uniformity of the dispersed liquid.

[0023] In addition, the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. The understanding of this specification should be based on the technical personnel in the relevant technical field. Although this specification has described the present invention in detail with reference to the above embodiments, ordinary technical personnel in the field should understand that the technical personnel in the relevant technical field can still modify or make equivalent substitutions to the present invention, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A double-layer flow plate, characterized in that: It includes an outer frame and a first flow equalizer plate and a second flow equalizer plate arranged in the outer frame. The first flow equalizer plate is located on the upper layer of the second flow equalizer plate in the outer frame. The first flow equalizer plate is divided into two flat flow sections and one wave flow section. The wave flow section is located between the two flat flow sections. The wave flow section is a uniform and continuous arc. The arc-shaped convex part of the wave flow section faces the second flow equalizer plate. The second flow equalizer plate is a uniform and continuous arc on one side opposite to the first flow equalizer plate. The arc-shaped convex part of the second flow equalizer plate faces the first flow equalizer plate. A plurality of flow equalizer holes are provided on both the first flow equalizer plate and the second flow equalizer plate.

2. The double-layer flow equalizer according to claim 1, characterized in that: The flow equalizing holes are arranged in a row, and the flow equalizing holes on the first flow equalizing plate correspond one by one to the flow equalizing holes on the second flow equalizing plate.

3. The double-layer flow equalizer according to claim 1 or 2, characterized in that: The aperture of the flow balancing holes on the first flow balancing plate is smaller than the aperture of the flow balancing holes on the second flow balancing plate.

4. The double-layer flow equalizer according to claim 1, characterized in that: A uniform flow hole is provided in the arc-shaped middle portion of the wave flow section.

5. The double-layer flow equalizer according to claim 1, characterized in that: Flow equalizing holes are provided in the arc-shaped middle part and the arc-shaped connection part of the second flow equalizing plate.

6. The double-layer flow equalizer according to claim 1, characterized in that: The surface of the second flow equalizer plate away from the first flow equalizer plate is a plane, and the upper and lower surfaces of the flat flow section of the first flow equalizer plate are both planes.

7. The double-layer flow equalizer according to claim 1, characterized in that: The outer frame and the first flow equalizer plate and the second flow equalizer plate are sealed around.

8. The double-layer flow equalizer according to claim 1, characterized in that: The flat flow section and the wave flow section each occupy one third of the first flow homogenizer.

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