JPH08159689A - Fluid conduit - Google Patents

Abstract

PURPOSE: To improve heat transfer promotion effect without increasing pressure loss of a fluid flowing in a pipe, to prevent any contamination from adhering to an inner surface of the pipe or to exfoliate adhering contamination. CONSTITUTION: There is disposed a flexible stripe 3 with its upstream side end fixed and its downstream side end made free in a pipe 1 through which a fluid 4 flows, and the flexible stripe 3 is interlocked or vibrated by receiving fluid pressure of the fluid 4 flowing in the pipe 1 whereby the fluid in the vicinity of an inner surface of the pipe 1 and the fluid in the vicinity of the center of the pipe are mixed or exchanged to promote heat transfer. Further, any contamination is prevented from adhering to the inner surface of the pipe 1 or adhered contamination is exfoliated by striking the inner surface of the pipe 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid conduit for introducing a refrigerant or water, such as a heat transfer tube for a heat exchanger or piping for a chemical plant. .

[0002]

2. Description of the Related Art One example of a conventional heat transfer tube is shown in FIG. The swirl vane 7 is fixed inside the pipe 1, and the swirl vane 7
The heat transfer is promoted by giving a swirl to the fluid flowing in the tube 1.

[0003]

In the above conventional heat transfer tube, since the swirl is attenuated by the viscous action of the fluid as it goes downstream, the effect of promoting heat transfer is reduced. Since the swirl vanes 7 forcefully swirl the fluid, the pressure loss of the fluid is large. When the fluid is dirty, the dirt adheres to and accumulates on the inner surface of the tube 1 to hinder the heat transfer of the tube 1 or reduce the area of the flow path in the tube to increase the pressure loss. There was a problem such as.

[0004]

The present invention has been invented to solve the above-mentioned problems, and its gist is to have an upstream end fixed in a pipe through which a fluid flows and a downstream end. And a flexible strip such as a band, a string, or a coil that strikes the inner surface of the pipe by swinging or vibrating in response to the fluid force of the fluid flowing in the pipe is provided. Located in the fluid conduit.

[0005]

In the present invention, the flexible strip oscillates or vibrates in response to the fluid force of the fluid flowing in the pipe to strike the inner surface of the pipe to remove the dirt adhering to the inner surface of the pipe. The fluid near the inner surface of the tube and the fluid near the center of the tube are mixed to promote heat transfer.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENT One embodiment of the present invention is shown in FIG. In the pipe 1 through which the fluid 4 flows, one strip 3 is arranged.
The upstream end of this band 3 is fixed to the pipe 1 via the support rod 2, and the downstream end is free.

When the fluid 4 flows in the pipe 1, however, the fluid 3 receives the fluid force and the band 3 oscillates or vibrates irregularly in the flow to strike the inner surface of the pipe 1 and At the same time as removing the attached dirt, heat transfer is promoted by mixing or exchanging the fluid near the inner surface of the tube 1 and the fluid near the center of the tube 1.

If it can be easily swung or vibrated in a fluid by receiving a fluid force, it can be replaced with a plurality of strings 5 shown in FIG. 2 or one coil 6 shown in FIG. However, it is desirable that the friction resistance is small in order to minimize the flow resistance of the fluid 4.
It is necessary to have flexibility. The upstream end of the flexible strip can be directly fixed to the inner surface of the pipe 1 without using the support rod 2, and thus the dirt attached to the inner surface of the pipe 1 can be easily removed. You can

[0009]

According to the present invention, since the fluid near the center of the tube and the fluid near the inner surface are mixed and exchanged by the swinging or vibration of the flexible strip, heat transfer is promoted.

Further, by hitting the inner surface of the tube with this flexible strip, it is possible to remove the dirt adhering to the inner surface of the tube or prevent the dirt from accumulating on the inner surface of the tube.

Since the flexible strip has flexibility and only the upstream end is fixed and the downstream end is free, it is possible to freely move in the fluid by receiving a fluid force. Since the force of the fluid is small, the pressure loss of the fluid is only the friction loss between the flexible strip and the fluid.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a second embodiment of the present invention.

FIG. 3 is a vertical sectional view showing a third embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view showing a conventional heat transfer tube.

[Explanation of symbols]

 1 tube 4 fluid 3 flexible strip

Claims (1)

[Claims] 1. An upstream end is fixed in a pipe in which a fluid flows, and a downstream end is free, and the inner surface of the pipe is tapped by being swung or vibrated by the fluid force of the fluid flowing in the pipe. A fluid conduit characterized by arranging a flexible strip such as a band, a string, and a coil.