CN213064068U - High wind speed high dilution type exhaust duct and exhaust apparatus - Google Patents
High wind speed high dilution type exhaust duct and exhaust apparatus Download PDFInfo
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- CN213064068U CN213064068U CN202021528538.7U CN202021528538U CN213064068U CN 213064068 U CN213064068 U CN 213064068U CN 202021528538 U CN202021528538 U CN 202021528538U CN 213064068 U CN213064068 U CN 213064068U
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Abstract
The utility model belongs to the technical field of exhaust apparatus, especially, relate to a high wind speed high dilution type exhaust duct and exhaust apparatus. The high wind speed and high dilution type exhaust pipeline comprises a first-stage pipeline and a second-stage pipeline. The first-stage pipeline is provided with a first inlet and a first outlet, and the flow cross section of the first outlet is smaller than that of the first inlet. The second-stage pipeline is provided with a second inlet and a second outlet; the first-stage pipeline extends into the second inlet and is fixedly connected with the second-stage pipeline, the second inlet is positioned below the first outlet, and the second outlet is positioned above the first outlet; a first pumping channel is formed between the second-stage pipeline and the first-stage pipeline. The exhaust device comprises the high-wind-speed high-dilution type exhaust pipeline. When the exhaust device works, waste gas is discharged after passing through the high-wind-speed high-dilution type exhaust pipeline, the exhaust device has the advantage of high wind speed, and the waste gas is diluted after being mixed with air, so that the exhaust device is safer to discharge.
Description
Technical Field
The utility model belongs to the technical field of exhaust apparatus, especially, relate to a high wind speed high dilution type exhaust duct and exhaust apparatus.
Background
A factory or the like needs to use an exhaust device to exhaust smoke or gas. Improperly designed exhaust devices not only are not effective at exhausting high concentrations of foul air, resulting in the induction of harmful or toxic exhaust emissions into the building air conditioning system, thereby contaminating the fresh air being delivered into the building. This occurs especially when the contaminated exhaust gas is heavier than air or is corrosive or has an unpleasant odor. In these cases it is necessary to extend the exhaust port to a height that allows dispersion to eliminate the risk of exhaust gas accumulation at the surface.
As shown in fig. 1, an exhaust apparatus 300 includes an exhaust duct 310 and an exhaust fan 320, wherein the exhaust duct 310 is a straight pipe. Since the injection height H1 of the exhaust duct 310 is low, the exhaust duct 310 has a high height to ensure that the gas is exhausted in a safe area having a height H, which is inconvenient to transport and occupies a large space when installed. Because the exhaust duct 310 is too long, resulting in an unstable structure, it is necessary to use a pulling wire or other support to ensure its stability. Furthermore, such an exhaust duct 310 obviously does not have the function of diluting the exhaust gases.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high dilution type exhaust duct of high wind speed and exhaust apparatus, the exhaust duct who aims at solving exhaust apparatus among the prior art is high higher, and the space that occupies during the installation is great, the technical problem of unstable structure.
In order to achieve the above object, an embodiment of the present invention provides a high-wind-speed high-dilution type exhaust duct, including:
the first-stage pipeline is provided with a first inlet and a first outlet, and the flow cross section of the first outlet is smaller than that of the first inlet; and
a second stage conduit having a second inlet and a second outlet; the first-stage pipeline extends into the second inlet and is fixedly connected with the second-stage pipeline, the second inlet is positioned below the first outlet, and the second outlet is positioned above the first outlet; a first air exhaust channel is formed between the second-stage pipeline and the first-stage pipeline.
Optionally, the high wind speed high dilution type exhaust duct further comprises:
a third stage conduit having a third inlet and a third outlet; the second-stage pipeline extends into the third inlet and is fixedly connected with the third-stage pipeline; the third inlet is located below the second outlet, and the third outlet is located above the second outlet; and a second air exhaust channel is formed between the third-stage pipeline and the second-stage pipeline.
Optionally, the second-stage pipeline is fixedly connected with the first-stage pipeline through a plurality of first connecting plates; the first connecting plate is parallel to the direction of the air flow in the first air exhaust channel.
Optionally, the third-stage pipeline is fixedly connected with the second-stage pipeline through a plurality of second connecting plates; the second connecting plate is parallel to the direction of air flow in the second air exhaust channel.
Optionally, a first sound insulation material layer is arranged on the inner wall surface of the first-stage pipeline and/or the second-stage pipeline.
Optionally, a second sound insulation material layer is arranged on the inner wall surface of the third-stage pipeline.
Optionally, the second-stage duct and/or the third-stage duct are in a truncated cone shape with a narrow top and a wide bottom.
Optionally, the first stage conduit is a right cylinder or a bifurcated conduit.
The embodiment of the utility model provides an above-mentioned one or more technical scheme in the high dilution type exhaust duct of high wind speed has one of following technological effect at least: when the high-wind-speed high-dilution type exhaust pipeline works, waste gas enters the first-stage pipeline, and because the flow cross section of the first outlet is smaller than that of the first inlet, when the gas is discharged from the first outlet, the flow speed of the gas is increased and a low-pressure area is formed, outside air is sucked into the first air-extracting channel from the second inlet and is discharged from the second outlet and then is mixed with the waste gas, so that the purpose of diluting the waste gas is achieved, and the diluted waste gas is discharged from the exhaust pipeline at a high wind speed; the high-wind-speed high-dilution type exhaust pipeline also has the advantages of low height, convenience in transportation and no space occupation in installation.
In order to achieve the above object, an embodiment of the present invention provides an exhaust apparatus, including the above-mentioned high wind speed high dilution type exhaust pipe.
Optionally, the exhaust apparatus further comprises:
an air extraction pipeline;
the pressurizing box is communicated with the air exhaust pipeline;
a bypass valve in communication with the boost tank; and
the high-wind-speed high-dilution type exhaust pipeline is communicated with an exhaust port of the fan; the pressure boosting box is communicated with an air suction port of the fan.
The embodiment of the utility model provides an among the exhaust apparatus above-mentioned one or more technical scheme have one of following technological effect at least: when the exhaust device works, waste gas is discharged after passing through the high-wind-speed high-dilution type exhaust pipeline, the exhaust device has the advantage of high wind speed, and the waste gas is diluted after being mixed with air, so that the exhaust device is safer to discharge.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural view of an exhaust apparatus in the related art.
Fig. 2 is a perspective view of a high wind speed high dilution type exhaust duct according to embodiment 1 of the present invention.
Fig. 3 is a plan view of a high wind speed and high dilution type exhaust duct according to embodiment 1 of the present invention.
Fig. 4 is a sectional view taken along line a-a in fig. 3.
Fig. 5 is a schematic structural view of a high wind speed and high dilution type exhaust duct provided in embodiment 2 of the present invention.
Fig. 6 is a schematic structural view of a high wind speed and high dilution type exhaust duct provided in embodiment 3 of the present invention.
Fig. 7 is a perspective view of a high wind speed high dilution type exhaust duct according to embodiment 4 of the present invention.
Fig. 8 is a plan view of a high wind speed high dilution type exhaust duct according to embodiment 4 of the present invention.
Fig. 9 is a sectional view taken along line B-B in fig. 8.
Fig. 10 is a perspective view of a high wind speed high dilution type exhaust duct according to embodiment 5 of the present invention.
Fig. 11 is a plan view of a high wind speed high dilution type exhaust duct according to embodiment 5 of the present invention.
Fig. 12 is a sectional view taken along line C-C in fig. 11.
Fig. 13 is a schematic structural view of a high wind speed and high dilution type exhaust duct according to embodiment 6 of the present invention.
Fig. 14 is a schematic structural view of an exhaust apparatus according to embodiment 7 of the present invention.
Fig. 15 is another schematic structural view of an exhaust apparatus according to embodiment 7 of the present invention.
Fig. 16 is a schematic structural view of an exhaust apparatus according to embodiment 8 of the present invention.
Fig. 17 is a schematic structural view of an exhaust system according to embodiment 9 of the present invention.
Fig. 18 is a schematic structural view of an exhaust system according to embodiment 10 of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary and intended to explain the embodiments of the present invention and are not to be construed as limiting the present invention.
Example 1
As shown in fig. 2 to 4, the present embodiment provides a high wind speed and high dilution type exhaust duct 100, which includes a first-stage duct 110a and a second-stage duct 120. The first-stage pipeline 110a is bifurcated and has a V-shape. The second-stage duct 120 is in a truncated cone shape with a narrow top and a wide bottom. The first-stage pipeline 110a has a first inlet 111 and a first outlet 112, and the flow cross section of the first outlet 112 is smaller than that of the first inlet 111. According to the venturi effect, when the restricted flow passes through the reduced flow section, the fluid has an increased flow velocity, which is inversely proportional to the flow section. Therefore, the exhaust gas is discharged from the first outlet 112 having a smaller flow cross section, and the flow velocity is faster. The number of the first inlets 111 and the first outlets 112 in this embodiment is not limited to one. In some embodiments of the present invention, the first outlet 112 and the first inlet 111 may also be two, three, etc., and all of the total flow cross section of the first outlet 112 is smaller than all of the total flow cross section of the first inlet 111.
As shown in fig. 4, the second stage conduit 120 has a second inlet 121 and a second outlet 122. The first stage pipe 110a extends into the second inlet 121 and is fixedly connected to the second stage pipe 120, the second inlet 121 is located below the first outlet 112, and the second outlet 122 is located above the first outlet 112. A first bleed passage 160 is formed between the second stage duct 120 and the first stage duct 110 a.
When the high wind speed and high dilution type exhaust duct 100 is in operation, the exhaust gas enters the first-stage duct 110a, because the flow cross section of the first outlet 112 is smaller than that of the first inlet 111, when the gas is discharged from the first outlet 112, the flow speed thereof is increased and a low pressure region is formed, the external air is sucked into the first pumping channel 160 from the second inlet 121 and is discharged from the second outlet 122 to be mixed with the exhaust gas, so as to dilute the exhaust gas, and the diluted exhaust gas is discharged from the exhaust duct at a high wind speed. The high wind speed and dilution type exhaust duct 100 also has the advantages of low height, convenient transportation and no space occupation in installation.
As shown in fig. 4, the second-stage pipeline 120 is fixedly connected to the first-stage pipeline 110a by a plurality of first connection plates 140. The first connecting plate 140 is parallel to the direction of the air flow in the first pumping channel 160. The first connection plate 140 plays a connection role, and simultaneously, the wind resistance is small, which is beneficial to air suction.
Example 2
The present embodiment is different from embodiment 1 in that: as shown in fig. 5, first sound insulating material layers 113 and 123 are provided on inner wall surfaces of the first-stage duct 110a and the second-stage duct 120. The first soundproof material layers 113 and 123 are soundproof cotton layers, and have silencing and soundproof functions to reduce noise during operation. In addition, a person skilled in the art may only provide the first sound insulation material layer on the inner wall surface of the first-stage duct 110a, or only provide the first sound insulation material layer on the inner wall surface of the second-stage duct 120, and the noise reduction function may also be achieved.
The rest of this embodiment is the same as embodiment 1, and the features not explained in this embodiment are explained by embodiment 1, which is not described again here.
Example 3
The present embodiment is different from embodiment 2 in that: as shown in fig. 6, the high wind speed and high dilution type exhaust duct 100 further includes a third stage duct 130, and the third stage duct 130 has a third inlet 131 and a third outlet 132. The second stage pipe 120 extends into the third inlet 131 and is fixedly connected to the third stage pipe 130. The third inlet 131 is located below the second outlet 122, and the third outlet 132 is located above the second outlet 122. A second bleed passage 170 is formed between the third stage duct 130 and the second stage duct 120. The tertiary conduit 130 serves to further dilute the gas.
The third stage pipeline 130 is fixedly connected with the second stage pipeline 120 through a plurality of second connecting plates 150. The second connecting plate 150 is parallel to the direction of the air flow in the second pumping channel 170. The second connecting plate 150 plays a connecting role, and simultaneously, the wind resistance of the second connecting plate is small, so that the gas suction is facilitated.
A second sound insulation material layer 133 is provided on an inner wall surface of the third-stage duct 130. The second soundproof material layer 133 is a soundproof cotton layer, which plays a role in noise reduction and sound insulation, and reduces noise during operation.
The first-stage pipe 110b has a straight tubular shape. The second-stage pipeline 120 and the third-stage pipeline 130 are in the shape of truncated cones with narrow top and wide bottom, and the arrangement can improve the flow rate of gas. Furthermore, in some embodiments of the present invention, only the second stage pipe 120 is in the shape of a truncated cone with a narrow top and a wide bottom, or only the third stage pipe 130 is in the shape of a truncated cone with a narrow top and a wide bottom, which can also achieve the purpose of increasing the flow rate of the gas.
The rest of this embodiment is the same as embodiment 2, and the features that are not explained in this embodiment are explained by embodiment 2, which is not described again here.
Example 4
The present embodiment is different from embodiment 1 in that: as shown in fig. 7 to 9, the first-stage pipeline 110c is bifurcated and has an "O" shape.
The rest of this embodiment is the same as embodiment 1, and the features not explained in this embodiment are explained by embodiment 1, which is not described again here.
Example 5
The present embodiment is different from embodiment 1 in that: as shown in fig. 10 to 12, the first-stage pipe 110d in this embodiment is bifurcated and has a strip-shaped hole 180 formed in the middle thereof.
The rest of this embodiment is the same as embodiment 1, and the features not explained in this embodiment are explained by embodiment 1, which is not described again here.
Example 6
This embodiment is different from embodiment 5 in that: as shown in fig. 13, the first-stage duct 110d and the second-stage duct 120 in the present embodiment are provided with first sound insulating material layers 113 and 123 on inner wall surfaces thereof, respectively.
The rest of this embodiment is the same as embodiment 5, and the features not explained in this embodiment are explained by embodiment 5, which is not described again here.
Example 7
As shown in fig. 14 and 15, the present embodiment provides an exhaust apparatus 200 including the above-described high wind speed high dilution type exhaust duct 100. When the exhaust device 200 works, waste gas is exhausted after passing through the high-wind-speed high-dilution type exhaust pipeline 100, the high-wind-speed high-dilution type exhaust device has the advantage of high wind speed, and the waste gas is diluted after being mixed with air, so that the exhaust device is safer to exhaust.
In another embodiment of the present invention, the exhaust device 200 further comprises an air exhaust pipe 210, a pressure increasing tank 220, a bypass valve 230 and a blower 240. The plenum 220 communicates with the extraction duct 210. The bypass valve 230 communicates with the booster tank 220, and specifically, a louver 231 is provided therebetween. The high wind speed and high dilution type exhaust duct 100 is communicated with an exhaust port of the fan 240. The pressure increasing box 220 is communicated with an air suction port of the fan 240, and an isolation air valve 250 is arranged at the joint of the two.
The fan 240 is a centrifugal fan with volute and is driven by a motor 241. When the fan 240 works, the exhaust pipeline 210 extracts exhaust gas, the bypass valve 230 extracts air from the outside and enters the booster box 220, the air enters the fan 240 after being boosted by the booster box 220 and is mixed with the exhaust gas, the mixed gas is discharged from the exhaust port of the fan 240 to the high-wind-speed high-dilution type exhaust pipeline 100, the gas discharged from the high-wind-speed high-dilution type exhaust pipeline 100 has the characteristic of high wind speed, the spraying height is H2, and even if the height of the high-wind-speed high-dilution type exhaust pipeline 100 is not high, the gas can be discharged in a safe area with the height of H.
Example 8
This embodiment is different from embodiment 7 in that: as shown in fig. 16, the fan 240 in this embodiment is a straight-flow centrifugal fan.
The rest of this embodiment is the same as embodiment 7, and the features not explained in this embodiment are explained by embodiment 7, which is not described again here.
Example 9
As shown in fig. 17, the present embodiment provides an exhaust system formed by combining two exhaust devices 200, which has higher exhaust efficiency and is suitable for exhaust in a large area. In some embodiments of the present invention, the exhaust system may also be obtained by combining three, four, five, six, etc. of said exhaust devices 200.
Example 10
The present embodiment is different from embodiment 9 in that: as shown in fig. 18, the present embodiment provides an exhaust system formed by combining four of the exhaust apparatuses 200. The four exhaust devices 200 are symmetrically distributed on two opposite sides respectively.
The rest of this embodiment is the same as embodiment 9, and the features not explained in this embodiment are explained by embodiment 9, which is not described again here.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. High wind speed high dilution type exhaust duct characterized by, includes:
the first-stage pipeline is provided with a first inlet and a first outlet, and the flow cross section of the first outlet is smaller than that of the first inlet; and
a second stage conduit having a second inlet and a second outlet; the first-stage pipeline extends into the second inlet and is fixedly connected with the second-stage pipeline, the second inlet is positioned below the first outlet, and the second outlet is positioned above the first outlet; a first air exhaust channel is formed between the second-stage pipeline and the first-stage pipeline.
2. The high wind speed high dilution type exhaust duct according to claim 1, further comprising:
a third stage conduit having a third inlet and a third outlet; the second-stage pipeline extends into the third inlet and is fixedly connected with the third-stage pipeline; the third inlet is located below the second outlet, and the third outlet is located above the second outlet; and a second air exhaust channel is formed between the third-stage pipeline and the second-stage pipeline.
3. The high wind speed high dilution type exhaust duct of claim 1, wherein the second stage duct is fixedly connected to the first stage duct by a plurality of first connection plates; the first connecting plate is parallel to the direction of the air flow in the first air exhaust channel.
4. The high wind speed high dilution type exhaust duct of claim 2, wherein the third stage duct is fixedly connected with the second stage duct by a plurality of second connection plates; the second connecting plate is parallel to the direction of air flow in the second air exhaust channel.
5. The high wind speed high dilution type exhaust duct according to any one of claims 1 to 4, wherein a first sound insulation material layer is provided on an inner wall surface of the first stage duct and/or the second stage duct.
6. The high wind speed high dilution type exhaust duct according to claim 2, wherein a second sound insulation material layer is provided on an inner wall surface of the third stage duct.
7. The high wind speed high dilution type exhaust duct according to claim 2, wherein the second stage duct and/or the third stage duct is in a truncated cone shape with a narrow top and a wide bottom.
8. The high wind speed high dilution type exhaust duct according to any one of claims 1 to 4, wherein the first stage duct is a straight tube or a branched duct.
9. An exhaust apparatus comprising the high wind speed high dilution type exhaust duct according to any one of claims 1 to 8.
10. The exhaust apparatus as claimed in claim 9, further comprising:
an air extraction pipeline;
the pressurizing box is communicated with the air exhaust pipeline;
a bypass valve in communication with the boost tank; and
the high-wind-speed high-dilution type exhaust pipeline is communicated with an exhaust port of the fan; the pressure boosting box is communicated with an air suction port of the fan.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021528538.7U CN213064068U (en) | 2020-07-28 | 2020-07-28 | High wind speed high dilution type exhaust duct and exhaust apparatus |
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| CN202021528538.7U CN213064068U (en) | 2020-07-28 | 2020-07-28 | High wind speed high dilution type exhaust duct and exhaust apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114378386A (en) * | 2021-12-29 | 2022-04-22 | 广东粤港澳大湾区硬科技创新研究院 | Exhaust device and vacuum reflow furnace |
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2020
- 2020-07-28 CN CN202021528538.7U patent/CN213064068U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114378386A (en) * | 2021-12-29 | 2022-04-22 | 广东粤港澳大湾区硬科技创新研究院 | Exhaust device and vacuum reflow furnace |
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