CN2184859Y

CN2184859Y - Fume pipe bent mounted with flow guide and direction guide blade

Info

Publication number: CN2184859Y
Application number: CN 93247175
Authority: CN
Inventors: 张远耀
Original assignee: CHINA WUHUAN CHEMICAL ENGINEERING Co
Current assignee: CHINA WUHUAN CHEMICAL ENGINEERING Co
Priority date: 1993-12-17
Filing date: 1993-12-17
Publication date: 1994-12-07
Anticipated expiration: 2003-12-17

Abstract

The utility model relates to a fume pipe bent mounted with flow guide and direction guide blades, which is suitable for a gas pipe system. The utility model is characterized in that the flow guide and direction guide blades arranged in the bent are distributed from thin to thick on the inner side of the pipe bent to the outer side of the pipe bent, and the inner part of the bent is divided into basically equal spaces by each flow (direction) guide blade. The structure can avoid the inner part of the bent happening turbulent flow and realize the transformation of the flow direction under the condition that the air flow in a pipe is uniformly distributed in space. When the bent is used in a fume pipe with a larger section and a high pressure head, the utility model can eliminate vibration and obtain good effect of stable and safe operation.

Description

Fume pipe bent mounted with flow guide and direction guide blade

The utility model relates to a kind of gas pipeline system that is suitable for, and is particularly suited for the smoke wind pipe elbow that flow guide and direction guide blade is housed that uses in the air-supply, flue system at large-sized boiler.

In gas pipeline, particularly in big section, high-head pipe-line system, air-supply, flue gas system as large-sized boiler, the corner of its piping is connected by elbow, in this elbow, because air-flow is big and fast, turbulent flow takes place very easily, make air turbulence not smooth, sharp pounding takes place break to cause pipeline.For avoiding the generation of above-mentioned phenomenon, existing method is that some water conservancy diversion or guide vane are set in the elbow of pipeline, the curved sheet of flow guide and direction guide blade, inboard along elbow is laid to dredging by close laterally, be that its spacing distance is laid by little gradually bigly, in actual use, though above-mentioned this mode can be slowed down the generation of turbulent flow in the elbow, but because the mode of its laying is reasonable inadequately, its effect is still desirable not to the utmost, for big flow, high-head smoke wind pipe, still easily produce the problem of turbulent flow and vibrations.

Task of the present utility model is to overcome above-mentioned weak point and provides a kind of and can significantly reduce the smoke wind pipe elbow that is provided with flow guide and direction guide blade that turbulent flow produces in the elbow.

The utility model is realized by following scheme: have a channel bend, in channel bend, be equiped with the flow guide and direction guide blade of arc along airflow direction, its difference is that flow guide and direction guide blade establishes the i.e. diminishing from inside to outside laying of spacing between flow guide and direction guide blade by dredging to gather laterally from the inboard of channel bend.

According to such scheme, basic design of the present utility model is: one, flow guide and direction guide blade is set, utilize the wall attachment effect of air-flow, strengthen air-flow at the trafficability performance of turning point that turns round, reduce the generation of turbulent flow, they are two years old, every flow guide and direction guide blade is cut apart air flue in elbow space or volume are equal substantially, this that is to say that the gas flow that is held in each gas channel in the elbow is basic equating in the unit interval, can make ducted air-flow under the relatively more uniform situation of spatial distribution, realize the conversion that flows to like this, keep its original laminar flow stable state.Facts have proved, adopt structure of the present utility model, in big section, high-head smoke wind pipe, use, eliminated seismism, obtained good result stable, safe operation.

Fig. 1 is the sectional structure chart of an embodiment of the utility model.

Fig. 2 is the sectional structure chart of another embodiment of the utility model.

An embodiment of the present utility model as shown in Figure 1, it is a slow shape channel bend 1 that changes, the angle of turning round is 90 °, whole elbow is a circular arc, guide vane 2 is housed in channel bend, the radian of guide vane is identical with the radian of pipeline, it is the angle complementation of turning round of the central angle of guide vane and elbow, arc radius γ is that the intersection point O of two turning face OM and ON is a variable to the distance between guide vane, guide vane is established by dredging to gather laterally from the inboard of channel bend, be δ 1＜δ 2＜δ 3 ...＜δ n, the spacing of guide vane is from inside to outside by greatly gradually little, and the arc air flue space that every guide vane is separated is equal substantially.For greater than 90 ° the angle of turning round, above-mentioned situation is identical.

Second embodiment of the present utility model as shown in Figure 2, it is a racing shape channel bend 1, pipeline section is a rectangle, and advance, does not wait the outlet, corner is 90 °, guide vane 3 is housed in the channel bend, the radian of guide vane is identical with the pipeline radian, the arc radius γ of every guide vane is identical, and the circular arc center of circle is positioned at channel bend and turns round on the angular bisector at angle, its width equates that with duct width the two ends of guide vane and front and back streamline 4 are tangent, for the angle of turning round greater than 90 °, above-mentioned situation is identical, guide vane is established by dredging to gather laterally from the inboard of channel bend, i.e. S1＜S2＜S3 ...＜Sn, guide vane and tangent line be two turning face OM in elbow, the air flue space of being cut apart between the ON is equal substantially.

Claims

1, a kind of smoke wind pipe elbow that flow guide and direction guide blade is housed, has a channel bend (1), in channel bend, be equiped with the flow guide and direction guide blade of arc, it is characterized in that flow guide and direction guide blade establishes by dredging to gather laterally from the inboard of channel bend along airflow direction.

2, by the described smoke wind pipe elbow that flow guide and direction guide blade is housed of claim 1, it is equal substantially to it is characterized in that every water conservancy diversion guiding guide vane is cut apart the space of air flue in channel bend.

3, by claim 1 or the 2 described smoke wind pipe elbows that flow guide and direction guide blade is housed, it is characterized in that in slow brick shape channel bend (1), the radian of guide vane (2) is identical with the radian of channel bend (1), and arc radius γ is that the intersection point O of two turning faces is to the distance between guide vane.

4, by claim 1 or the 2 described smoke wind pipe elbows that flow guide and direction guide blade is housed, it is characterized in that in racing shape channel bend (1), the radian of guide vane (3) is identical with the pipeline radian, the arc radius γ of every guide vane is identical, and the circular arc center of circle is positioned at channel bend turns round on the angular bisector at angle, and the two ends of guide vane and front and back streamline (4) are tangent.