An air suction duct, air suction system and powder spraying chamber

Abstract

A kind of suction tube, suction system and powder spraying chamber;Suction tube is provided with suction inner cavity along the height extension direction;The side of suction tube is provided with multiple sections of tube suction port from low to high respectively, multiple tube suction ports are arranged in line in turn, and tube suction port is the input end of suction tube;Wherein two tube suction ports distributed in upper and lower are spaced apart to form the empty side;The side position of suction tube is provided with tube air outlet, tube air outlet is located outside the empty side, tube air outlet is horizontally aligned with the empty side, and tube air outlet is the output end of suction tube;Tube suction port, suction inner cavity and tube air outlet are communicated.This scheme can unify and quickly recycle powder of multiple height positions of powder spraying chamber, the suction volume of powder spraying chamber is smaller, power consumption is lower, and the situation that other positions are difficult to inhale powder due to excessive local air volume is prevented.

Description

Technical Field

[0001] This utility model relates to the field of exhaust ducts, and more particularly to an exhaust duct, an exhaust system, and a powder spraying chamber. Background Technology

[0002] Powder spraying guns are typically used in a spraying chamber. Some of the powder output from the gun does not adhere to the workpiece surface and disperses within the chamber. To prevent this powder from affecting subsequent spraying processes, existing technologies install exhaust fans in the spraying chamber, using negative pressure to remove impurities, including the powder. However, due to the height of the spraying chamber, the output powder may be distributed at different heights. Some existing technologies directly install exhaust vents at a specific height, but the number and height of these vents are limited, preventing the intake of powder at varying heights. Other technologies place exhaust vents at multiple heights within the spraying chamber, with an exhaust vent at one location. Since the exhaust vent is horizontally aligned with an exhaust vent, this creates significant suction, leading to uneven suction at other heights. Especially for exhaust vents far from the exhaust vent, insufficient suction may occur, often requiring increased power from the exhaust device, which increases power consumption. Utility Model Content

[0003] The purpose of this invention is to provide an exhaust duct that can be installed at the air outlet of the powder spraying chamber. The exhaust duct draws in powder from the powder spraying chamber through its multi-segment exhaust ports, which are arranged from low to high. Powder at different heights in the powder spraying chamber is collected and discharged through the exhaust ports, which can enable the unified and rapid recovery of powder at multiple heights in the powder spraying chamber.

[0004] This utility model also proposes an exhaust system, which is provided with the above-mentioned exhaust duct.

[0005] This utility model also proposes a powder spraying chamber, which is equipped with the above-mentioned exhaust system.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A ventilation duct with an internal ventilation cavity along its height extension direction;

[0008] The side of the exhaust duct is provided with multiple exhaust ports from low to high, and the multiple exhaust ports are arranged in a straight line in sequence. The exhaust ports are the input ends of the exhaust duct. Two exhaust ports distributed vertically are separated to form a side that is not open to air. The side of the exhaust duct is provided with an exhaust port, which is located outside the side that is not open to air. The exhaust port is horizontally aligned with the side that is not open to air and is the output end of the exhaust duct.

[0009] The cylinder exhaust port, exhaust cavity, and cylinder outlet are connected.

[0010] Optimally, for some adjacent sections of the cylindrical exhaust port, the inner diameter of the lower cylindrical exhaust port is larger than the inner diameter of the upper cylindrical exhaust port.

[0011] Optimally, the inner diameter of the cylinder exhaust port is 10–90 mm.

[0012] Optimally, the exhaust duct has a top exhaust port on the side of the top, which is one of the input ends of the exhaust duct; the top exhaust port is aligned in a straight line with the exhaust ports arranged below; the inner diameter of the top exhaust port is larger than the inner diameter of the plurality of exhaust ports below it.

[0013] Optimally, the air outlet of the duct is located between the middle and the top of the exhaust duct.

[0014] Optimally, the inner diameter of the top exhaust vent is 50-70 mm.

[0015] Optimally, the exhaust duct has a powder suction port at the input end of the exhaust port, and the inner diameter of the powder suction port gradually narrows from the outside to the inside.

[0016] Optimally, the exhaust cavity has an inclined inner wall at its end, the input end of the exhaust cylinder is horizontally oriented toward the inclined inner wall, the inclined inner wall extends obliquely from the end of the exhaust cavity toward the middle, and the inclined inner wall transitions from the bottom wall or top wall of the exhaust cavity to the side wall of the exhaust cavity.

[0017] An exhaust system includes: an exhaust device and an exhaust duct as described above;

[0018] The input end of the exhaust device is connected to the air outlet of the cylinder.

[0019] A powder spraying chamber equipped with the aforementioned ventilation system.

[0020] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0021] This solution provides an exhaust duct that can be installed at the air outlet of the powder spraying chamber. The exhaust duct draws in powder from the powder spraying chamber through its multi-segment exhaust ports, which rise from low to high. Powder at different heights in the powder spraying chamber is collected and discharged through the exhaust ports located on the duct. This allows for the unified and rapid recovery of powder at multiple heights in the powder spraying chamber. It also reduces the air volume in the powder spraying chamber, lowers power consumption, and prevents situations where excessive local air volume makes it difficult to draw in powder at other locations. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main structure of one embodiment of the exhaust duct;

[0023] Figure 2 This is a side view of one embodiment of the exhaust duct;

[0024] Figure 3 This is a top view of one embodiment of the exhaust duct; Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," "inner side," "outer side," "inner end," "outer end," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0027] like Figure 1-3 A ventilation duct, having a ventilation cavity 21 along its height extension direction;

[0028] The exhaust duct 02 has multiple exhaust ports 22 arranged from low to high on its side, and these ports are arranged in a straight line. Each exhaust port 22 is the input end of the exhaust duct 02. Two exhaust ports 22 arranged vertically are spaced apart to form a clearance side 23. An exhaust port 24 is located on the side of the exhaust duct 02, outside the clearance side 23. The exhaust port 24 is horizontally aligned with the clearance side 23 and is the output end of the exhaust duct 02.

[0029] The cylinder exhaust port 22, the exhaust cavity 21, and the cylinder outlet 24 are connected.

[0030] This solution provides an exhaust duct that can be installed at the air outlet of the powder spraying chamber 1. The exhaust duct 02 draws in powder from the powder spraying chamber 1 through its multi-segment exhaust port 22, which rises from low to high. Powder at different heights in the powder spraying chamber 1 is collected and discharged through the exhaust port 24. This allows for the unified and rapid recovery of powder at multiple heights in the powder spraying chamber 1, resulting in a smaller exhaust volume and lower power consumption. It also prevents situations where excessive local airflow makes it difficult to draw in powder at other locations.

[0031] Specifically, the powder spraying chamber 1 is used for powder spraying. Workpieces can be placed inside the powder spraying chamber 1 and sprayed using a conventional powder spraying gun. Especially during the upward and downward spraying process of the powder spraying gun, the powder output from the gun easily disperses to different height positions within the powder spraying chamber 1. To address this, the exhaust duct 02 has multiple exhaust ports 22 arranged in a straight line. Each exhaust port 22 corresponds to a specific horizontal area of ​​the powder spraying chamber 1. Therefore, the exhaust ports 22 are distributed from low to high, allowing them to draw in powder from different height areas within the powder spraying chamber 1. The exhaust ports 22 and the exhaust duct... The inner cavity 21 is connected, so the powder drawn in by the tube exhaust port 22 can be output into the exhaust inner cavity 21; the exhaust tube 02 is also provided with a tube exhaust port 24, which is connected to the exhaust inner cavity 21. The tube exhaust port 24 can be connected to a conventional exhaust device 28. The exhaust device 28 draws away the gas from the tube exhaust port 24, creating a negative pressure in the exhaust inner cavity 21. Under the action of negative pressure, the exhaust inner cavity 21 draws in air from the powder spraying chamber 1 through the multi-section tube exhaust port 22. The powder is transferred from the powder spraying chamber 1 to the exhaust inner cavity 21 with the air, and then discharged through the tube exhaust port 24. This design cleverly incorporates a clearance side 23 between two vertically distributed cylindrical exhaust ports 22. This clearance side 23 separates two cylindrical exhaust ports 22. A cylindrical exhaust port 24 is positioned at the horizontal alignment of this clearance side 23, but it is horizontally away from the clearance side 23, meaning it is not aligned with the straight line of the cylindrical exhaust ports 22. Powder can be drawn into the exhaust cavity 21 from the cylindrical exhaust ports 22 above or below the clearance side 23. This prevents powder from being drawn into the exhaust cavity 21 from a single cylindrical exhaust port. The tube 22 and the tube outlet 24 are horizontally and linearly connected, which prevents powder from being directly discharged after passing horizontally through the tube exhaust port 22, the exhaust cavity 21 and the tube outlet 24. This also prevents the exhaust tube 02 from needing a larger air volume to suck up powder from other locations. The air volume at the input end of the exhaust tube 02 can be dispersed to the tube exhaust port 22 above and below the clearance side 23. Thus, the clearance design of the tube outlet 24 can prevent the local air volume from being too large, making it difficult for the tube exhaust port 22, which is far from the tube outlet 24, to suck up powder.

[0032] Optimally, for some adjacent sections of the cylindrical exhaust port 22, the inner diameter of the lower cylindrical exhaust port 22 is larger than the inner diameter of the upper cylindrical exhaust port 22.

[0033] The side of the exhaust duct 02 is provided with multiple sections of exhaust ports 22 from low to high. For two adjacent sections of exhaust ports 22, the inner diameter of the lower exhaust port 22 is larger than that of the upper exhaust port 22. This results in the multiple sections of exhaust ports 22 being arranged radially from small inner diameter to large inner diameter. There are larger inner diameters of the exhaust ports 22 at the bottom and top of the exhaust duct 02. Since the powder generally falls into the powder spraying chamber 1 by its own weight, the powder dispersed in the powder spraying chamber 1 enters the exhaust cavity 2. The powder is more easily drawn to the bottom of the powder spraying chamber 1. Therefore, the inner diameter of the lower cylinder exhaust port 22 is designed to be larger, which allows more powder to be drawn in from the lower part of the exhaust chamber 21 and less powder to be drawn in from the upper part of the exhaust chamber 21. This reduces the air volume while drawing in the same amount of powder, and distributes the suction force evenly at different heights of the exhaust chamber 21. The lower the position of the cylinder exhaust port 22, the more powder is drawn in. This solves the problem that existing powder spraying chambers 1 require higher power exhaust devices 28 to recover powder, resulting in a large exhaust volume and higher power consumption.

[0034] Optimally, the inner diameter of the cylinder exhaust port 22 is 10-90 mm.

[0035] This embodiment further defines the inner diameter of the cylindrical exhaust port 22 as 10-90 mm. For example, a group of multiple cylindrical exhaust ports 22 arranged from bottom to top in adjacent positions have inner diameters of 80 mm, 30 mm, and 20 mm, respectively. The inner diameter of the cylindrical exhaust port 22 at the bottom is four times that of the cylindrical exhaust ports 22 at the top, so the bottom cylindrical exhaust port 22 can draw in four times the amount of powder, thereby drawing in more powder located at the bottom.

[0036] Optimally, the exhaust duct 02 has a top exhaust port 25 on the side of the top, and the top exhaust port 25 is one of the input ends of the exhaust duct 02; the top exhaust port 25 is aligned in a straight line with the exhaust ports 22 arranged below; the inner diameter of the top exhaust port 25 is larger than the inner diameter of the plurality of exhaust ports 22 below it.

[0037] This design includes a top exhaust port 25 above multiple linearly arranged cylindrical exhaust ports 22, located at the top of the exhaust cylinder 02. The inner diameter of the top exhaust port 25 is larger than the inner diameter of the multiple cylindrical exhaust ports 22 below it, meaning that the top exhaust port 25 can draw in more powder than the lower cylindrical exhaust ports 22. The exhaust cylinder 02 is vertically installed in the powder spraying chamber 1, drawing in powder at different heights in the powder spraying chamber 1. This increases the amount of powder drawn in near the top of the powder spraying chamber 1, thus preventing more powder from accumulating at the top of the powder spraying chamber 1 and avoiding the problems of difficult-to-clean powder residue and increased powder consumption.

[0038] Optimally, the air outlet 24 is located between the middle and the top of the exhaust duct 02.

[0039] The tube outlet 24 is located at any position between the middle and the top of the exhaust tube 02. Since the tube outlet 24 is located above the exhaust tube 02, when the tube outlet 24 is connected to the exhaust device 28, the exhaust device 28 creates a negative pressure within the exhaust cavity 21. Because the tube outlet 24 is closer to the top exhaust port 25, the powder at the top of the powder spraying chamber 1 can quickly enter the top exhaust port 25 and then be output through the tube outlet 24, further accelerating the discharge efficiency of the powder at the top of the powder spraying chamber 1. Simultaneously, the distance from the powder between the middle and the top of the exhaust cavity 21 to the tube outlet 24 is shorter, making it easier for the powder located between the middle and the top to be discharged.

[0040] Optimally, the inner diameter of the top exhaust vent 25 is 50-70 mm.

[0041] The inner diameter of the top exhaust port 25 is 50-70mm, and it can be selected as 50mm, 55mm, 60mm, 65mm, etc. as needed. Since the top exhaust port 25 is located at the top of the exhaust duct 02, its inner diameter is larger than that of the multiple exhaust ports 22 below, which can concentrate the powder located at the top of the powder spraying chamber 1 and avoid the problem of powder accumulating at the top and becoming difficult to clean.

[0042] Optimally, the exhaust duct 02 is provided with a powder suction port 26 at the input end of the exhaust port 22, and the inner diameter of the powder suction port 26 gradually narrows from the outside to the inside.

[0043] The output end of the powder suction port 26 is connected to the top exhaust port 25 or the cylindrical exhaust port 22. The input end of the powder suction port 26 can be located at different heights in the powder spraying chamber 1. The inner diameter of the powder suction port 26 gradually narrows from the outside to the inside. The powder suction port 26 can have a larger inner diameter at the outermost end, so as to more easily suck up the powder. The powder can be guided into the exhaust cavity 21 along the inclined surface formed inside.

[0044] Optimally, the exhaust cavity 21 is provided with a cylindrical inclined inner wall 27 at its end, and the input end of the exhaust duct 02 is horizontally oriented toward the cylindrical inclined inner wall 27 at its end. The cylindrical inclined inner wall 27 extends obliquely from the end of the exhaust cavity 21 toward the middle, and the cylindrical inclined inner wall 27 transitions from the bottom wall or top wall of the exhaust cavity 21 to the side wall of the exhaust cavity 21.

[0045] The exhaust cavity 21 may be provided with a cylindrical inclined inner wall 27 at the top and / or bottom wall as needed, as shown in the figure. The inclined direction of the cylindrical inclined inner wall 27 is: extending inclinedly from the end of the exhaust cavity 21 towards the middle, and the cylindrical inclined inner wall 27 transitions from the bottom or top wall of the exhaust cavity 21 to the side wall of the cylindrical inclined inner wall 27. Therefore, the cylindrical inclined inner wall 27 can shorten the horizontal distance of the exhaust cavity 21 at the top and / or bottom wall, making the airflow smoother and making it easier to guide the powder to the cylinder outlet 24 through the cylindrical inclined inner wall 27. At the same time, the cylindrical inclined inner wall 27 replaces the corner position between the bottom wall and the side wall of the exhaust cavity 21, which can avoid the powder from being trapped at the corner position of the exhaust cavity 21.

[0046] A ventilation system includes: a ventilation device 28 and a ventilation duct as described above;

[0047] The input end of the exhaust device 28 is connected to the air outlet 24 of the cylinder.

[0048] When the exhaust device 28 is started, the input end of the exhaust device 28 draws away the gas from the air outlet 24 of the cylinder and discharges it to the outside through the output end of the exhaust device 28, thereby creating a negative pressure in the exhaust cavity 21.

[0049] A powder spraying chamber equipped with the aforementioned ventilation system.

[0050] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An exhaust duct, characterized in that, An exhaust cavity is provided along the height extension direction; The side of the exhaust duct is provided with multiple exhaust ports from low to high, and the multiple exhaust ports are arranged in a straight line in sequence. The exhaust ports are the input ends of the exhaust duct. Two exhaust ports distributed vertically are separated to form a side that is not open to air. The side of the exhaust duct is provided with an exhaust port, which is located outside the side that is not open to air. The exhaust port is horizontally aligned with the side that is not open to air and is the output end of the exhaust duct. The cylinder exhaust port, exhaust cavity, and cylinder outlet are connected.

2. The exhaust duct according to claim 1, characterized in that, In some adjacent sections of the cylindrical exhaust port, the inner diameter of the lower cylindrical exhaust port is larger than the inner diameter of the upper cylindrical exhaust port.

3. The exhaust duct according to claim 2, characterized in that, The inner diameter of the exhaust port of the cylinder is 10-90mm.

4. The exhaust duct according to claim 2, characterized in that, The exhaust duct has a top exhaust port on its side at the top, which is one of the input ends of the exhaust duct; the top exhaust port is aligned in a straight line with the exhaust ports arranged below it; the inner diameter of the top exhaust port is larger than the inner diameter of the plurality of exhaust ports below it.

5. The exhaust duct according to claim 4, characterized in that, The air outlet of the duct is located between the middle and the top of the exhaust duct.

6. The exhaust duct according to claim 4, characterized in that, The inner diameter of the top exhaust vent is 50-70mm.

7. The exhaust duct according to claim 1, characterized in that, The exhaust duct has a powder suction port at the input end of the exhaust port, and the inner diameter of the powder suction port gradually narrows from the outside to the inside.

8. A ventilation duct according to any one of claims 1-7, characterized in that, The exhaust cavity has an inclined inner wall at its end. The input end of the exhaust cylinder is horizontally oriented toward the inclined inner wall. The inclined inner wall extends obliquely from the end of the exhaust cavity toward the middle. The inclined inner wall transitions from the bottom or top wall of the exhaust cavity to the side wall of the exhaust cavity.

9. A ventilation system, characterized in that, include: A ventilation device and a ventilation duct as described in any one of claims 1-8; The input end of the exhaust device is connected to the air outlet of the cylinder.

10. A powder spraying chamber, characterized in that, The ventilation system described in claim 9 is installed.

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