Waste gas emission device for PCB (printed circuit board) production

Abstract

The utility model provides an exhaust emission device for PCB (printed circuit board) production. The exhaust emission device comprises an air extractor, an exhaust pipe, a filter tank, an air outlet pipe, an exhaust fan, a mesh plate, a filter chamber, a partition plate, a lower filter cavity, an upper filter cavity, a filter element, an opening and closing door and a movable plate, a filter chamber is provided with an upper filter cavity and a lower filter cavity; when the filter element in the lower filter cavity needs to be cleaned and replaced, the filter element in the lower filter cavity can be taken out by opening and closing the door only by moving the movable plates at the two ends of the lower filter cavity to enable the through holes in the movable plates to be staggered with the holes in the mesh plate, and in the process, waste gas is filtered through the upper filter cavity; when the filter element in the upper filter cavity needs to be cleaned and replaced, the same operation can be adopted, so that the filter element in the filter device cannot influence the filtration of waste gas when being cleaned and replaced, and a worker can normally carry out welding operation.

Description

Technical Field

[0001] This utility model relates to the field of electronic product processing technology, specifically to a waste gas emission device for PCB board production. Background Technology

[0002] A PCB (Printed Circuit Board) is a board that provides electrical connections for electronic components. It has a history of over a hundred years. Its design primarily involves layout design. The main advantages of using PCBs are significantly reduced wiring and assembly errors, improved automation, and higher production efficiency. Based on the number of layers, PCBs can be classified as single-sided, double-sided, four-layer, six-layer, and other multilayer boards. Electronic components on PCBs are laid out and installed using soldering. During soldering, soldering materials generate harmful fumes, which need to be extracted from the production workshop using suction devices and purified by filtration before being released. However, the fumes contain solid dust, and after a period of time, the filters can become clogged. This requires removing and replacing or cleaning the filter element. During this process, the filter cannot function, preventing the suction devices from extracting the fumes and thus affecting the workers' normal soldering operations. Utility Model Content

[0003] The purpose of this utility model is to design a waste gas emission device for PCB board production to solve the problems mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution: a filter tank connected to the exhaust pipe of an extraction device, the end of the filter tank being connected to an exhaust fan via an exhaust pipe, two perforated plates fixedly connected inside the filter tank, a filter chamber provided between the two perforated plates, a partition plate fixedly connected between the two perforated plates, the partition plate dividing the filter chamber into a lower filter chamber and an upper filter chamber, a filter element embedded in each of the lower and upper filter chambers, and both the lower and upper filter chambers having opening and closing doors for removing and installing the filter element, a movable plate slidably connected inside the filter tank on the side of the perforated plate away from the partition plate, which is in close contact with the perforated plate, four movable plates being provided, respectively located at both ends of the lower and upper filter chambers, and the movable plates having through holes aligned or misaligned with the holes in the perforated plates.

[0004] Furthermore, one end of the movable plate penetrates through the filter tank, and a handle is fixedly attached to one side wall of the filter tank.

[0005] Furthermore, limiting grooves are provided at both ends of the partition and on the inner wall of the filter tank, and the moving plate is slidably connected to the limiting grooves.

[0006] Furthermore, a limiting platform is fixedly connected to the outer wall of the limiting groove, and a fixed platform that is attached to the limiting platform is provided at the end of the movable plate.

[0007] Furthermore, the filter element includes a filter frame, the interior of which is filled with a dust filter cotton layer, an oil fume filter cotton layer, and an activated carbon adsorption layer.

[0008] Furthermore, the filter tank has a spray chamber on the side near the exhaust pipe, a spray pipe is provided at the top of the spray chamber, the exhaust pipe is connected to the lower part of the spray chamber, the upper part of the spray chamber is connected to the filter chamber, and the bottom of the spray chamber is connected to a drain pipe.

[0009] Furthermore, a first vertical plate and a second vertical plate are fixedly connected to the top of the spray chamber, and a third vertical plate is fixedly connected to the bottom of the spray chamber. The third vertical plate is located between the first vertical plate and the second vertical plate. A first horizontal plate is fixedly connected to the side wall of the third vertical plate away from the spray chamber. An air outlet groove is provided between the first horizontal plate and the second vertical plate, and an air outlet channel is formed between the first vertical plate, the second vertical plate and the third vertical plate.

[0010] Furthermore, the air outlet groove is aligned with the center of the filter chamber.

[0011] Furthermore, a bent plate is provided on the side wall of the third vertical plate near the spray chamber, and the length of the horizontal plate of the bent plate is not less than the length of the distance between the first vertical plate and the third vertical plate.

[0012] Furthermore, a plurality of second horizontal plates are provided between the first vertical plate and the second vertical plate, and the plurality of second horizontal plates form a bent air passage.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The filter chamber of this utility model is provided with an upper filter chamber and a lower filter chamber; when it is necessary to clean and replace the filter element located in the lower filter chamber, it is only necessary to move the moving plates at both ends of the lower filter chamber so that the through holes in the moving plates are misaligned with the holes in the mesh plate, and the filter element in the lower filter chamber can be taken out through the opening and closing door. During this process, the exhaust gas will be filtered through the upper filter chamber; when it is necessary to clean and replace the filter element in the upper filter chamber, the same operation described above can be used. Therefore, the filter element in the filter device of this utility model will not affect the filtration of exhaust gas when it is cleaned and replaced, and the workers can carry out welding operations normally. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partial cross-sectional view of the present invention.

[0017] The components are as follows: 1. Exhaust pipe; 2. Filter tank; 3. Spray pipe; 4. Handle; 5. Moving plate; 6. Opening and closing door; 7. Air outlet pipe; 8. Bending plate; 9. Spray chamber; 10. Drain pipe; 11. Limiting platform; 12. First horizontal plate; 13. Air outlet groove; 14. Fixed platform; 15. First vertical plate; 16. Second horizontal plate; 17. Third vertical plate; 18. Second vertical plate; 19. Limiting groove; 20. Filter element; 21. Partition plate; 22. Mesh plate. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0019] Example: Please refer to Figure 1-2 A waste gas emission device for PCB board production includes a filter tank 2 connected to an exhaust pipe 1 of an extraction device. The end of the filter tank 2 is connected to an exhaust fan via an exhaust pipe 7. Two perforated plates 22 are fixedly connected inside the filter tank 2, with a filter chamber between them. A partition 21 is fixedly connected between the two perforated plates 22, dividing the filter chamber into a lower filter chamber and an upper filter chamber. A filter element 20 is embedded in both the lower and upper filter chambers, and both chambers have opening and closing doors 6 for removing and installing the filter element 20. Four movable plates 5 are slidably connected inside the filter tank 2 on the side of the perforated plate 22 facing away from the partition 21, respectively located at both ends of the lower and upper filter chambers. The movable plates 5 are aligned with or... Because of the misaligned through holes, when the filter element 20 in the lower filter chamber needs to be removed, replaced, or cleaned, it is only necessary to move the moving plates 5 at both ends of the lower filter chamber so that the through holes in the moving plates 5 are misaligned with the holes in the mesh plate 22. At this time, the lower filter chamber forms a sealed space, and the filter element 20 can be taken out of the lower filter chamber by removing the opening and closing door 6. After cleaning and reinstalling in the lower filter chamber, the moving plates 5 are pushed back to their original positions, at which point the through holes and holes are aligned, thus completing the installation of the filter element 20. During this process, the exhaust gas will be filtered through the upper filter chamber. When the filter element 20 in the upper filter chamber needs to be cleaned or replaced, the same operation can be used. Therefore, the filter element 20 in the filter device of this utility model will not affect the filtration of exhaust gas when it is cleaned or replaced, and the workers can carry out welding operations normally.

[0020] In this embodiment, one end of the movable plate 5 penetrates through the filter tank 2, and a handle 4 is fixedly connected to one side wall of the filter tank 2 to facilitate the movement of the movable plate 5; both ends of the partition plate 21 and the inner wall of the filter tank 2 are provided with limiting grooves 19, the movable plate 5 is slidably connected to the limiting grooves 19, and a limiting platform 11 is fixedly connected to the outer wall of the limiting grooves 19. The end of the movable plate 5 is provided with a fixed platform 14 that is in contact with the limiting platform 11. When the filter element 20 needs to be cleaned, simply pull the handle 4 to move the movable plate 5, thereby moving the fixed platform 14. When the 4th plate is in contact with the limiting platform 11, it indicates that the moving plate 5 has moved into place. At this time, the through holes in the moving plate 5 are misaligned with the holes in the mesh plate 22, thereby isolating the exhaust gas. The filter element 20 includes a filter frame, the interior of which is filled with a dust filter cotton layer, an oil fume filter cotton layer, and an activated carbon adsorption layer, thereby adsorbing dust, oil fumes, and toxic substances from the exhaust gas. The filter tank 2 has a spray chamber 9 on the side near the exhaust pipe 1. The top of the spray chamber 9 is equipped with a spray pipe 3. The exhaust pipe 1 connects to the lower part of the spray chamber 9, and the upper part of the spray chamber 9 connects to the filter chamber. The bottom of the spray chamber 9 is connected to a drain pipe 10. A first vertical plate 15 and a second vertical plate 18 are fixedly connected to the top of the spray chamber 9, and a third vertical plate 17 is fixedly connected to the bottom of the spray chamber 9. The third vertical plate 17 is located between the first vertical plate 15 and the second vertical plate 18. A first horizontal plate 12 is fixedly connected to the side wall of the third vertical plate 17 facing away from the spray chamber 9. An air outlet groove 13 is provided between the first horizontal plate 12 and the second vertical plate 18. An air outlet channel is formed between the first vertical plate 15, the second vertical plate 18, and the third vertical plate 17. The air outlet groove 13 is aligned with the center of the filter chamber to allow exhaust gas to enter. Spraying treatment is performed to initially eliminate dust and fumes in the exhaust gas, thereby improving the service life of the filter element 20. A bent plate 8 is provided on the side wall of the third vertical plate 17 near the spray chamber 9. The length of the horizontal plate of the bent plate 8 is not less than the length of the distance between the first vertical plate 15 and the third vertical plate 17, thereby preventing exhaust gas from flowing directly out of the exhaust channel and improving the quality of spraying. Several second horizontal plates 16 are provided between the first vertical plate 15 and the second vertical plate 18. The several second horizontal plates 16 form a bent air passage to prevent the spray liquid from entering the filter chamber.

[0021] Working principle: When the filter element 20 in the lower filter chamber needs to be removed, replaced, or cleaned, first pull the handle 4 in the movable plate 5 at both ends of the lower filter chamber to move the movable plate 5. When the fixed platform 14 is in contact with the limiting platform 11, release the handle 4. At this time, the through hole in the movable plate 5 is misaligned with the hole in the mesh plate 22, so that the lower filter chamber forms a sealed space. Then, the filter element 20 in the lower filter chamber can be taken out by removing the opening and closing door 6. After cleaning and reinstalling in the lower filter chamber, push the movable plate 5 back to its original position. At this time, the through hole and the hole are aligned, thus completing the installation of the filter element 20. During this process, the exhaust gas will be filtered through the upper filter chamber. When the filter element 20 in the upper filter chamber needs to be cleaned or replaced, the same operation can be used. Therefore, the filter element 20 in the filter device of this utility model will not affect the filtration of exhaust gas when it is cleaned or replaced, and the staff can carry out welding operations normally.

[0022] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "upper," "lower," "left," "right," "front," "back," and similar expressions used in this document are for illustrative purposes only.

[0023] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A waste gas emission device for PCB board production, comprising a filter tank (2) connected to an exhaust pipe (1) of an extraction device, wherein the end of the filter tank (2) is connected to an exhaust fan via an exhaust pipe (7), characterized in that: The filter tank (2) is fixedly connected to two perforated plates (22), and a filter chamber is provided between the two perforated plates (22). A partition (21) is fixedly connected between the two perforated plates (22), and the partition (21) divides the filter chamber into a lower filter chamber and an upper filter chamber. A filter element (20) is embedded in both the lower filter chamber and the upper filter chamber. Both the lower filter chamber and the upper filter chamber are provided with opening and closing doors (6) for disassembling and assembling the filter element (20). The filter tank (2) located on the side of the perforated plate (22) away from the partition (21) is slidably connected to a movable plate (5) that is in close contact with the perforated plate (22). There are four movable plates (5), which are located at both ends of the lower filter chamber and the upper filter chamber respectively. The movable plates (5) are provided with through holes that are aligned or misaligned with the holes in the perforated plate (22).

2. The exhaust gas emission device for PCB board production according to claim 1, characterized in that: One end of the movable plate (5) penetrates the filter tank (2), and a handle (4) is fixedly attached to one side wall of the filter tank (2).

3. The waste gas emission device for PCB board production according to claim 1, characterized in that: Limiting grooves (19) are provided on both ends of the partition (21) and on the inner wall of the filter tank (2), and the moving plate (5) is slidably connected to the limiting grooves (19).

4. The exhaust gas emission device for PCB board production according to claim 3, characterized in that: A limiting platform (11) is fixedly attached to the outer wall of the limiting groove (19), and a fixed platform (14) is provided at the end of the moving plate (5) to be in contact with the limiting platform (11).

5. The waste gas emission device for PCB board production according to claim 1, characterized in that: The filter element (20) includes a filter frame, the interior of which is filled with a dust filter cotton layer, an oil fume filter cotton layer and an activated carbon adsorption layer.

6. The exhaust gas emission device for PCB board production according to claim 1, characterized in that: The filter tank (2) has a spray chamber (9) on the side near the exhaust pipe (1). The top of the spray chamber (9) is provided with a spray pipe (3). The exhaust pipe (1) is connected to the bottom of the spray chamber (9). The upper part of the spray chamber (9) is connected to the filter chamber. The bottom of the spray chamber (9) is connected to a drain pipe (10).

7. The exhaust gas emission device for PCB board production according to claim 6, characterized in that: The top of the spray chamber (9) is fixedly connected to a first vertical plate (15) and a second vertical plate (18), and the bottom of the spray chamber (9) is fixedly connected to a third vertical plate (17). The third vertical plate (17) is located between the first vertical plate (15) and the second vertical plate (18). A first horizontal plate (12) is fixedly connected to the side wall of the third vertical plate (17) away from the spray chamber (9). An air outlet groove (13) is provided between the first horizontal plate (12) and the second vertical plate (18). An air outlet channel is formed between the first vertical plate (15), the second vertical plate (18) and the third vertical plate (17).

8. The waste gas emission device for PCB board production according to claim 7, characterized in that: The air outlet groove (13) is aligned with the center of the filter chamber.

9. The waste gas emission device for PCB board production according to claim 7, characterized in that: The third vertical plate (17) has a bent plate (8) on its side wall near the spray chamber (9). The length of the horizontal plate of the bent plate (8) is not less than the length of the distance between the first vertical plate (15) and the third vertical plate (17).

10. The waste gas emission device for PCB board production according to claim 7, characterized in that: A plurality of second horizontal plates (16) are provided between the first vertical plate (15) and the second vertical plate (18), and the plurality of second horizontal plates (16) form a bent air passage.

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