阅读说明：本技术 一种移动式可调节的旋转射流加强局部排风的装置 (Device for reinforcing local air exhaust by movable adjustable rotary jet flow ) 是由 钱华 何平 郑晓红 于 2021-06-30 设计创作，主要内容包括：本发明公开了一种移动式可调节的旋转射流加强局部排风的装置,该装置包括排风口、射流腔、排风管、射流管、风机箱、集尘箱和三通管；其中,所述排风口与排风管的一端连通,所述排风管另一端与集尘箱连通,所述集尘箱下部设有万向轮,所述集尘箱上部与风机箱连接,所述集尘箱与所述风机箱之间设有过滤装置,所述风机箱内设有风机,所述风机出口与三通管的第一管相连,所述三通管的第二管上设有风阀,第二管与室内空气相连；所述三通管的第三管上设有风阀,第三管与射流管一端连通,所述射流管另一端与射流腔连通,所述射流腔位于排风口外部,沿排风口周向设置,所述射流腔开口设有射流口。该装置可以有效实现对环境局部污染的治理。(The invention discloses a movable adjustable device for strengthening local air exhaust by rotary jet, which comprises an air outlet, a jet cavity, an air exhaust pipe, a jet pipe, a fan box, a dust collection box and a three-way pipe, wherein the air outlet is communicated with the jet cavity; the air outlet is communicated with one end of an exhaust pipe, the other end of the exhaust pipe is communicated with a dust collection box, universal wheels are arranged at the lower part of the dust collection box, the upper part of the dust collection box is connected with a fan box, a filtering device is arranged between the dust collection box and the fan box, a fan is arranged in the fan box, the outlet of the fan is connected with a first pipe of a three-way pipe, an air valve is arranged on a second pipe of the three-way pipe, and the second pipe is connected with indoor air; the three-way pipe is characterized in that an air valve is arranged on a third pipe of the three-way pipe, the third pipe is communicated with one end of a jet pipe, the other end of the jet pipe is communicated with a jet cavity, the jet cavity is located outside the air outlet and is circumferentially arranged along the air outlet, and a jet opening is formed in the jet cavity. The device can effectively realize the treatment of the local environmental pollution.)

1. A movable adjustable device for strengthening local air exhaust by rotary jet flow is characterized by comprising an air exhaust outlet (1), a jet flow cavity (3), an exhaust pipe (4), a jet flow pipe (5), a fan box (7), a dust collection box (10) and a three-way pipe; wherein the content of the first and second substances,

the air outlet (1) is communicated with one end of an air exhaust pipe (4), the other end of the air exhaust pipe (4) is communicated with a dust collection box (10), universal wheels (11) are arranged on the lower portion of the dust collection box (10), the upper portion of the dust collection box (10) is connected with a fan box (7), a filtering device (9) is arranged between the dust collection box (10) and the fan box (7), a fan (8) is arranged in the fan box (7), the outlet of the fan (8) is connected with a first pipe of a three-way pipe, an air valve (6) is arranged on a second pipe of the three-way pipe, and the second pipe is connected with indoor air; be equipped with blast gate (6) on the third pipe of three-way pipe, third pipe and efflux pipe (5) one end intercommunication, efflux pipe (5) other end and efflux chamber (3) intercommunication, efflux chamber (3) are located air exit (1) outside, set up along air exit (1) circumference, efflux chamber (3) opening is equipped with efflux mouth (2).

2. The mobile adjustable device for enhancing local air discharge with rotating jets according to claim 1, characterized in that the jet chamber (3) is circular in cross section.

3. The mobile adjustable device for enhanced local air discharge with rotating jets according to claim 1, characterized in that the air damper (6) on the third pipe can adjust the flow of the jet orifice (2).

4. The mobile adjustable device for enhancing local air discharge by rotating jet flow according to claim 1, wherein the area of the jet flow port (2) is 0.05-2 times of the area of the air discharge port (1).

5. The mobile adjustable device for enhancing local air discharge by rotating jet flow according to claim 1, wherein the central axis of the jet flow pipe (5) is perpendicular to the radial direction of the jet flow cavity (3), and the included angle between the central axis of the jet flow pipe (5) and the central axis of the jet flow cavity (3) is 75-90 °.

6. The mobile adjustable device for enhancing local air discharge by rotating jet according to claim 1, characterized in that the inner and outer surfaces of the jet chamber (3) are bell-mouthed at the end near the jet orifice (2).

7. Device for mobile adjustable rotating jet enhanced local air exhaust according to claim 1 characterized in that means for handling dust are provided in the dust bin (10).

8. The mobile adjustable device for enhancing local air discharge by rotating jet flow according to claim 1 is characterized in that the fan (8) is fixedly connected with the inner wall of the fan box (7), and a noise reduction device is arranged at the joint of the fan (8) and the fan box (7).

9. The mobile adjustable device for enhancing local air discharge with rotating jets according to claim 1, characterized in that the air discharge duct (4) can adjust the position of the air discharge outlet (1).

Technical Field

The invention relates to a local pollution treatment device, in particular to a movable adjustable device for strengthening local air exhaust by rotary jet flow.

Background

In the interior of industrial buildings, various pollutants associated with industrial production include particles, harmful gases and the like. These pollutants invade the respiratory tract, contact the skin surface of the human body or enter the human body through the digestive tract, so that the organs and systems of the human body are affected, and the health of the human body is greatly damaged. The complex process conditions, especially in the ventilation and transformation process of the existing industrial buildings, limit the distance between the local exhaust hood and the pollution source because the original design does not reserve space. Conventional partial exhaust hoods are inefficient. For example, in a casting plant, a large amount of high-temperature flue gas is generated in the molten iron pouring process, but a local exhaust hood is not available at present, so that the high-temperature flue gas can be effectively treated. The jet flow reinforced exhaust system is characterized in that the vertical jet flow and the suction flow are combined together to improve the suction axial speed, so that the directional pollutant trapping effect is improved. But this technique has additionally increased a set of fan that produces the efflux, has increased initial investment and project energy consumption, and has great noise, has restricted this technological popularization. Meanwhile, the air volume is fixed, the application scene is limited, and the adjustment cannot be carried out along with the change of the process. Therefore, it is desired to solve the above problems.

Disclosure of Invention

The technical problem is as follows: the invention provides a movable adjustable device for strengthening local air exhaust by rotating jet flow, which can effectively treat local environmental pollution.

The invention content is as follows: in order to solve the technical problem, the invention provides a movable adjustable device for strengthening local air exhaust by rotary jet, which comprises an air outlet, a jet cavity, an exhaust pipe, a jet pipe, a fan box, a dust collection box and a three-way pipe; the air outlet is communicated with one end of an exhaust pipe, the other end of the exhaust pipe is communicated with a dust collection box, universal wheels are arranged at the lower part of the dust collection box, the upper part of the dust collection box is connected with a fan box, a filtering device is arranged between the dust collection box and the fan box, a fan is arranged in the fan box, the outlet of the fan is connected with a first pipe of a three-way pipe, an air valve is arranged on a second pipe of the three-way pipe, and the second pipe is connected with indoor air; the three-way pipe is characterized in that an air valve is arranged on a third pipe of the three-way pipe, the third pipe is communicated with one end of a jet pipe, the other end of the jet pipe is communicated with a jet cavity, the jet cavity is located outside the air outlet and is circumferentially arranged along the air outlet, and a jet opening is formed in the jet cavity.

Preferably, the cross section of the jet cavity is circular.

Preferably, an air valve on the third pipe can adjust the flow of the jet opening.

Preferably, the area of the jet opening is 0.05-2 times of that of the air outlet.

Preferably, the axis of efflux pipe is perpendicular with efflux chamber radial direction, and the contained angle between efflux pipe axis and the efflux chamber axis is 75 ~ 90.

Preferably, the inner surface and the outer surface of the jet flow cavity are both in a bell mouth shape at one end close to the jet flow port.

Preferably, a device for processing dust is arranged in the dust collection box.

Preferably, the fan is fixedly connected with the inner wall of the fan box, and a noise reduction device is arranged at the joint of the fan and the fan box.

Preferably, the exhaust pipe can adjust the position of the exhaust outlet.

Has the advantages that: compared with the prior art, the invention has the following remarkable advantages:

(1) the invention adopts a single fan as the power of exhaust and jet flow, recycles the filtered air, saves the volume of the device and additional investment, and reduces the initial investment and the operation energy consumption.

(2) Through the guiding function of the jet cavity, a rotary jet is formed, and the suction speed of the central axis of the air outlet is increased; compared with the traditional vertical jet flow, the jet flow has higher capture efficiency.

(3) The invention has compact structure, can make the air outlet reach the nearest distance of the process limit by moving and changing the position of the air exhaust pipe, and aims the axis of the air exhaust cover at the pollution source, thereby realizing good local ventilation and being beneficial to the transformation of the local ventilation of the existing industrial building.

(4) The device can adjust the size of jet flow, along with the increase of jet flow air quantity, the suction speed of the axis of the air outlet is increased, and the action range of the air outlet is narrowed; along with the reduction of the jet flow air quantity, the action range of the air outlet is enlarged, and the suction speed of the axis of the air outlet is reduced. The jet flow size can be adjusted according to different processes, and the application scene is wide.

(5) Through the design to the efflux chamber, reduced the noise that the exhaust hood produced, improved personnel's comfort level.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a perspective view of the jet port, the jet chamber, the exhaust duct and the jet duct after assembly in the embodiment of the present invention;

FIG. 3 is a top view of the jet orifice, the jet chamber, the exhaust duct, and the jet duct in an embodiment of the present invention after assembly.

FIG. 4(a) is a schematic diagram of the effective range of the hood at a lower jet flow rate in an embodiment of the present invention;

FIG. 4(b) is a schematic diagram of the effective range of the hood with a large flow rate according to the embodiment of the present invention.

The figure shows that: the air outlet 1, the jet opening 2, the jet cavity 3, the air outlet pipe 4, the jet pipe 5, the air valve 6, the fan box 7, the fan 8, the filter device 9, the dust collection box 10 and the universal wheel 11.

Detailed Description

The invention is further described in detail below with reference to the drawings and examples.

As shown in fig. 1, the device for enhancing local exhaust by movable adjustable rotating jet according to the embodiment of the present invention is characterized in that the device comprises an exhaust outlet 1, a jet chamber 3, an exhaust duct 4, a jet duct 5, a fan box 7, a dust box 10 and a three-way pipe. The air outlet 1 is communicated with one end of an air exhaust pipe 4, and the other end of the air exhaust pipe 4 is communicated with a dust box 10. The lower part of the dust box 10 is provided with universal wheels 11. The universal wheels 11 are arranged, so that the movement of the whole device can be realized. The upper part of the dust collection box 10 is connected with the fan box 7, and a filtering device 9 is arranged between the dust collection box 10 and the fan box 7. A fan 8 is arranged in the fan box 7. The outlet of the fan 8 is connected with the first pipe of the three-way pipe. And an air valve 6 is arranged on a second pipe of the three-way pipe, and the second pipe is connected with indoor air. An air valve 6 is arranged on a third pipe of the three-way pipe, the third pipe is communicated with one end of a jet pipe 5, and the other end of the jet pipe 5 is communicated with a jet cavity 3. The jet cavity 3 is positioned outside the air outlet 1 and is arranged along the circumferential direction of the air outlet 1. The opening of the jet cavity 3 is provided with a jet port 2.

A circle of jet devices are arranged at the edge of the air outlet 1. The function of efflux has, has kept off the air at exhaust hood rear portion and has got into the exhaust hood to form negative pressure zone through efflux in exhaust port week, promoted the flow of exhaust port front end to the exhaust port. Through the mechanism, the action range of the exhaust hood is more directional, and the axial suction speed is increased. Above-mentioned device during operation, polluted gas is inhaled by air exit 1, gets into dust collection box 10 through air exit 1, becomes clean air entering fan 8 behind rethread filter equipment 9, enters into efflux chamber 3 through efflux pipe 5 at last, discharges through efflux mouth 2, forms the efflux and strengthens the entrapment efficiency to the pollutant.

The invention adopts a single fan as the power of exhaust and jet flow, recycles the filtered air, saves the volume of the device and extra investment, and reduces the initial investment and the operation energy consumption; through the guiding effect of the jet flow cavity, the rotary jet flow is formed, the suction speed of the central axis of the air outlet is increased, and compared with the traditional vertical jet flow, the jet flow type air outlet has higher efficiency; the device can adjust the size of jet flow, can achieve good pollutant treatment effect through adjustment under different working conditions, and is wide in application scene.

Preferably, as shown in fig. 2 and 3, the fluidic chamber 3 has a circular cross-section. And an air valve 6 on the third pipe can adjust the flow of the jet orifice 2. The flow of the jet orifice 2 is adjusted by controlling the opening size of the air valve 6.

Preferably, the area of the jet opening 2 is 0.05-2 times of the area of the air outlet 1. This preference allows the jet to increase the speed of suction of the axis. The function of the jet flow of the jet orifice 2 is: 1. the air at the rear part of the exhaust hood is prevented from entering the exhaust hood; 2. a negative pressure area is formed around the air outlet through jet flow, and the flow of the front end of the air outlet to the air outlet is promoted (Bernoulli equation, when the flow rate of the fluid is high, the pressure is low). Through the two mechanisms, the action range of the exhaust hood is more directional, and the axial suction speed is increased.

Preferably, the axis of efflux pipe 5 is perpendicular with 3 radius directions in efflux chamber, and the contained angle between 5 axis of efflux pipe and the 3 axis in efflux chamber is 75 ~ 90. As shown in fig. 2 and 3, the air flow enters the jet chamber 3 along the jet pipe 5, and makes a rotational flow in the jet chamber 3, so that the air flow is rotationally ejected from the jet orifice 2 to the outside. For example, a cartesian coordinate system is adopted, a certain radial direction of the jet cavity is (1, 0, 0), the central axis direction of the jet cavity is (0, 0, 1), the central axis direction of the jet pipe is (0, 1, α), and α takes the value of (-tan (75 °), 0). The air flow enters the jet flow cavity 3 through the jet pipe 5 at the angle and rotates in the jet flow cavity 3, so that a rotational jet flow is formed at the jet orifice 2. This preferred embodiment has a higher collection efficiency than the conventional vertical jet.

Preferably, the inner surface and the outer surface of the jet cavity 3 are both in a bell mouth shape at one end close to the jet orifice 2. The horn mouth shape can reduce the generation of vortex in the jet cavity 3 and the noise of the device.

Preferably, a device for treating dust is provided in the dust box 10. And devices for treating dust, such as cyclone dust collectors and wet dust collectors, etc. Means for handling dust are provided to clean the air.

Preferably, the fan 8 is fixedly connected with the inner wall of the fan box 7, and a noise reduction device is arranged at the joint of the fan 8 and the fan box 7. For example, the noise reduction device employs a cushion pad or soundproof cotton. And the noise reduction device is arranged to reduce the noise generated when the device works.

Preferably, the exhaust duct 4 can adjust the position of the exhaust port 1. The exhaust duct 4 can be made of metal snakeskin tube and other materials. The exhaust duct 4 can be bent and deformed, and maintains the deformed shape. Thus, the position of the air outlet 1 is adjusted by changing the shape of the air outlet pipe 4. Meanwhile, the exhaust pipe 4 plays a certain supporting role to support the jet cavity 3.

In actual use, the device of the present invention can be pushed to the vicinity of the contaminant first, and the pulley 11 is locked and fixed. Adjusting an exhaust pipe 4 to aim at a pollution source, starting exhaust, and gradually increasing jet flow by adjusting an air valve 6 on a third air pipe. In the process, the action range of the air outlet 1 is gradually narrowed, and the axial suction speed is increased, so that the optimal working condition is achieved. The efficient trapping effect can be achieved for pollution sources in different forms, and the working point is guaranteed to meet the environmental protection requirement. The jet air volume of the device is small as shown in fig. 4(a), and large as shown in fig. 4 (b). The effective range of the hood is shown in fig. 4(a) and 4 (b). The exhaust hood has wider action range by adopting smaller jet flow air quantity, but the suction is closer, and the exhaust hood is suitable for the situation that pollution sources are dispersed. When the larger jet flow air quantity is adopted, the acting range of the exhaust hood can be narrowed, but the exhaust hood is farther sucked, and the exhaust hood is suitable for the situation that the pollution source is single and the distance is longer.

The device of the invention adopts a single fan as the power of exhaust and jet flow, recycles the filtered air, saves the volume and extra investment of the device, and reduces the initial investment and the operation energy consumption. Through the guiding function of the jet flow cavity 3, a rotary jet flow is formed, and the suction speed of the central axis of the air outlet 1 is increased. The device of the present invention has a higher efficiency relative to conventional vertical jets. The device is small and flexible, the air outlet 1 can reach the nearest distance of the process limitation by moving and changing the position of the air exhaust pipe 4, and the axis of the air outlet is aligned to a pollution source, so that good local ventilation is realized, and the transformation of the local ventilation of the existing industrial building is facilitated. The device can adjust the size of jet flow, along with the increase of the air quantity of the jet flow, the suction speed of the axis of the air outlet 1 is increased, and the action range of the air outlet 1 is narrowed; along with the reduction of the jet flow air quantity, the action range of the air outlet 1 is narrowed, and the axial suction speed of the air outlet 1 is reduced. Thus, according to different processes, the jet flow size is adjusted, and good treatment can be achieved. Meanwhile, the invention reduces the noise generated by the exhaust hood and improves the comfort level of personnel by designing the jet flow cavity. As shown in fig. 2 and 3, the air outlet of the present application becomes a horn shape, which has two functions: 1. the generation of a vortex area is reduced, and 2, the local flow velocity in the jet cavity is reduced. The flow noise in the jet chamber is caused by these two effects. Through the actual measurement of the model, the noise near the exhaust hood can be reduced from the original 110dB to 98dB through the improvement of the shape of the exhaust hood, and the noise reduction effect is obvious.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.