Device for preventing dust from flowing backwards during coating

Abstract

The utility model discloses a coating dust backflow prevention device which comprises a furnace tube and a vacuum pump, the furnace tube is connected with a first pipeline, the air exhaust end of the vacuum pump is connected with a second pipeline, and a Tesla pipeline is detachably connected between the first pipeline and the second pipeline through a first connecting assembly and a second connecting assembly respectively. And a first valve is arranged on the first pipeline. Compared with the prior art, the Tesla pipeline provided by the utility model has the advantages that when the pump jumps, the flowing of backflow gas can be hindered, so that enough time is provided for closing the first valve, and the coating material in the furnace tube is prevented from being recharged into the raw material bin.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic coating, in particular to a coating dust backflow prevention device. Background Art

[0002] Photovoltaic panel coating refers to the process of covering the surface of photovoltaic cells with a thin film material. Its main purpose is to improve the light absorption capacity and photoelectric conversion efficiency of photovoltaic cells.

[0003] During coating, the photovoltaic panel needs to be placed in a furnace tube, and a coating material is injected into the furnace tube. A vacuum pump is used to keep the pressure in the furnace tube within a desired reaction range so that the coating material adheres to the photovoltaic panel.

[0004] When the vacuum pump trips, due to the low air pressure in the furnace tube, gas will enter the furnace tube from the pipe connected to the vacuum pump, causing the coating material in the furnace tube to be re-injected into the raw material bin. After the various coating materials are mixed in the furnace tube and then re-injected, they will cause contamination of the raw materials in each raw material bin, thereby causing losses. Utility Model Content

[0005] The main purpose of the utility model is to provide a coating anti-dust backflow device. When the Tesla pipeline jumps the pump, it can hinder the flow of reflux gas, thereby providing sufficient time for the closing of the first valve, thereby preventing the coating material in the furnace tube from backflowing into the raw material bin.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A coating dust backflow prevention device comprises a furnace pipe and a vacuum pump, wherein the furnace pipe is connected to a first pipe, the exhaust end of the vacuum pump is connected to a second pipe, the first pipe and the second pipe are detachably connected with a Tesla pipe via a first connecting component and a second connecting component respectively, and a first valve is arranged on the first pipe.

[0008] Furthermore, the first connecting assembly and the second connecting assembly have the same structure and both include a first flange and a second flange. The first flange and the second flange are connected by bolts. An annular groove is provided on the side where the first flange contacts the second flange. An annular airbag is provided in the annular groove. An air pipe is connected to the annular airbag. One end of the air pipe passes through the first flange and is provided with a second valve.

[0009] Furthermore, a receiving groove matching the annular airbag is provided on the side of the second flange in contact with the first flange.

[0010] Furthermore, the first flange of the first connecting assembly is welded to the first pipe, the first flange of the second connecting assembly is welded to the second pipe, and the second flanges of the first connecting assembly and the second connecting assembly are respectively welded to both ends of the Tesla pipe.

[0011] Furthermore, a gas flow meter is provided on the second pipeline.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The Tesla pipeline of the utility model can hinder the flow of reflux gas when the pump is tripped, thereby providing sufficient time for the closing of the first valve, thereby preventing the coating material in the furnace tube from flowing back into the raw material bin.

[0014] The Tesla pipeline of the utility model is easy to disassemble and assemble, so it is convenient for personnel to clean the Tesla pipeline.

[0015] The first flange and the second flange of the utility model are sealed by an annular airbag, so during assembly, there is no need to arrange a sealing ring between the two, so that the sealing ring protruding relative to the flange will not cause difficulty in assembling the first flange and the second flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of a coating anti-dust backflow device of the utility model.

[0017] Figure 2 This is a schematic structural diagram of a first connecting component of a coating anti-dust backflow device of the utility model.

[0018] Figure 3 This is a schematic diagram of the second flange structure of a coating anti-dust backflow device of the utility model.

[0019] In the figure: 1, furnace tube; 2, first pipeline; 3, Tesla pipeline; 4, second pipeline; 5, first valve; 6, first connecting assembly; 601, first flange; 602, annular groove; 603, annular airbag; 604, gas transmission pipe; 605, second valve; 606, second flange; 6061, receiving groove; 7, second connecting assembly; 8, gas flow meter; 9, vacuum pump. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] like Figure 1-3As shown, a coating dust backflow prevention device includes a furnace tube 1 and a vacuum pump 9, the furnace tube 1 is connected to a first pipe 2, the exhaust end of the vacuum pump 9 is connected to a second pipe 4, the first pipe 2 and the second pipe 4 are detachably connected with a Tesla pipe 3 through a first connecting component 6 and a second connecting component 7 respectively, and the first pipe 2 is provided with a first valve 5.

[0022] Tesla Pipe 3 uses the principles of fluid dynamics to achieve unidirectional conduction. When fluid flows into Tesla Pipe 3 from one end, due to its special design, the fluid can pass smoothly and flow to the other end. However, when the fluid tries to flow in from the other end, it will encounter a series of obstacles and bends, resulting in fluid energy loss and flow obstruction, thus achieving the effect of unidirectional conduction.

[0023] In this embodiment, under normal conditions, the vacuum pump 9 works to extract the gas in the furnace tube 1 through the first pipe 2, the Tesla pipe 3 and the second pipe 4, and the material in the raw material bin is continuously injected into the furnace tube 1, so that the pressure in the furnace tube 1 is within the required reaction range. At this time, the raw material in the furnace tube 1 will be attached to the photovoltaic panel for coating (this is a conventional technology for photovoltaic panel coating, which will not be described in detail here);

[0024] When the vacuum pump 9 trips, since the gas pressure in the furnace tube 1 is much lower, the external gas will flow back into the furnace tube 1 from the second pipe 4, the Tesla pipe 3 and the first pipe 2. During this process, the Tesla pipe 3 will hinder the flow of the reflux gas, thereby providing sufficient time for the closing of the first valve 5, thereby preventing the material in the furnace tube 1 from flowing back into the raw material bin.

[0025] Among them, Figure 1 and Figure 2 As shown, the first connecting component 6 and the second connecting component 7 have the same structure and both include a first flange 601 and a second flange 606. The first flange 601 and the second flange 606 are connected by bolts. An annular groove 602 is provided on the side where the first flange 601 contacts the second flange 606. An annular airbag 603 is provided in the annular groove 602. An air pipe 604 is connected to the annular airbag 603. One end of the air pipe 604 passes through the first flange 601 and is provided with a second valve 605. The first flange 601 of the first connecting component 6 is welded to the first pipeline 2, the first flange 601 of the second connecting component 7 is welded to the second pipeline 4, and the second flanges 606 of the first connecting component 6 and the second connecting component 7 are respectively welded to both ends of the Tesla pipeline 3.

[0026] When in use, the two ends of the Tesla pipeline 3 are connected to the first pipeline 2 and the second pipeline 4 respectively through the first connecting component 6 and the second connecting component 7. As the use time increases, the Tesla pipeline 3 needs to be cleaned. At this time, the personnel can remove the bolts so that the first flange 601 of the first connecting component 6 and the second connecting component 7 is no longer fixedly connected, and open the second valve 605 to discharge the gas in the annular airbag 603, so that the personnel can remove the Tesla pipeline 3 from the device for cleaning. After the cleaning is completed, the personnel connects the Tesla pipeline 3 to the first pipeline 2 and the second pipeline 4 again through the first connecting component 6 and the second connecting component 7, and uses an external air pump to inflate the annular airbag 603 through the air pipe 604, so that the annular airbag 603 bulges, thereby blocking the gap between the first flange 601 and the second flange 606 to avoid air leakage at the connection between the Tesla pipeline 3 and the first pipeline 2 or the second pipeline 4. After the inflation is completed, the second valve 605 is closed.

[0027] Among them, Figure 3 As shown, a receiving groove 6061 matching the annular airbag 603 is provided on the side where the second flange 606 contacts the first flange 601. After the first flange 601 and the second flange 606 are fixed by bolts, a part of the annular airbag 603 after the collision will be located in the receiving groove 6061 of the second flange 606.

[0028] Wherein, a gas flow meter 8 is provided on the second pipeline 4. Figure 1 As shown, when the vacuum pump 9 is working, the amount of gas flowing through the second pipeline 4 per unit time can be known through the gas flow meter 8, so as to determine whether the Tesla pipeline 3 needs to be cleaned.

[0029] Working principle: First, during normal use, the vacuum pump 9 works to extract the gas in the furnace tube 1 through the first pipe 2, the Tesla pipe 3 and the second pipe 4, and the material in the raw material bin is continuously injected into the furnace tube 1, so that the pressure in the furnace tube 1 is within the required reaction range. At this time, the raw material in the furnace tube 1 will be attached to the photovoltaic panel for coating operation. When the vacuum pump 9 is tripped, since the air pressure in the furnace tube 1 is much lower, the external gas will flow back into the furnace tube 1 from the second pipe 4, the Tesla pipe 3 and the first pipe 2. During this process, the Tesla pipe 3 will hinder the flow of the reflux gas, thereby providing sufficient time for the closing of the first valve 5, thereby preventing the reaction material in the furnace tube 1 from being backflowed into the raw material bin. In addition, during long-term use, the Tesla pipe 3 is easy to disassemble and assemble, so that it is convenient for personnel to clean the Tesla pipe 3. Moreover, the first flange 601 and the second flange 606 are sealed by the annular airbag 603. Therefore, during assembly, the first flange 601 and the second flange 606 will not be difficult to assemble due to the raised sealing ring.

[0030] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A coating dust backflow prevention device, comprising a furnace tube (1) and a vacuum pump (9), characterized in that: The furnace tube (1) is connected to a first pipeline (2), the vacuum end of the vacuum pump (9) is connected to a second pipeline (4), the first pipeline (2) and the second pipeline (4) are detachably connected to a Tesla pipeline (3) via a first connecting component (6) and a second connecting component (7), respectively, and the first pipeline (2) is provided with a first valve (5).

2. A coating dust backflow prevention device according to claim 1, characterized in that: The first connection assembly (6) and the second connection assembly (7) have the same structure and both comprise a first flange (601) and a second flange (606); the first flange (601) and the second flange (606) are connected by bolts; a circular groove (602) is provided on the side surface where the first flange (601) and the second flange (606) are in contact; an annular air bag (603) is provided in the annular groove (602); an air supply pipe (604) is connected to the annular air bag (603); one end of the air supply pipe (604) passes through the first flange (601) and is provided with a second valve (605).

3. A coating dust backflow prevention device according to claim 2, characterized in that: A receiving groove (6061) matching the annular airbag (603) is provided on the side of the second flange (606) in contact with the first flange (601).

4. A coating dust backflow prevention device according to claim 2 or 3, characterized in that: The first flange (601) of the first connecting component (6) is welded to the first pipeline (2), the first flange (601) of the second connecting component (7) is welded to the second pipeline (4), and the second flanges (606) of the first connecting component (6) and the second connecting component (7) are respectively welded to both ends of the Tesla pipeline (3).

5. The coating dust backflow prevention device according to claim 1, characterized in that: A gas flow meter (8) is provided on the second pipeline (4).

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