JPH02479Y2 - - Google Patents

Description

[Detailed explanation of the invention] <Industrial application field> This invention supplies steam into a rotating cylinder,
This invention relates to a steam locking device for a siphon tube that discharges condensate in a cylinder in a cylinder dryer used for drying paper, cloth, etc. by dissipating heat from the cylinder circumferential surface.

<Conventional technology> As a conventional technology of this type,
As shown in Publication No. 31960, the steam trap used on the condensate discharge side of the siphon pipe,
There is a device that eliminates steam locking by allowing the exhaust valve to release a small amount of steam at all times. In other words, the siphon pipe that discharges condensate from a cylinder dryer is connected to a steam trap from the condensate reservoir in the cylinder through the steam supply path to the outside world. When the supply line is heated and the condensate inside re-evaporates and is filled with re-evaporated steam, no condensate flows into the steam trap, and if this continues, the steam trap will open its valve, meaning it will not drain water. However, by constantly releasing a small amount of steam from the exhaust valve of the steam trap, the steam inside the siphon pipe is released and steam locking is eliminated, and the condensate is released into the steam trap. If it flows in, it will be drained.

<Problems to be Solved by the Invention> According to the above-mentioned conventional technology, since steam is constantly released even if it is in a very small amount, there is a problem in that a large amount of steam is lost.

<Means for solving the problem> The means of this invention is that in a cylinder dryer equipped with a siphon pipe for discharging condensate, the internal part of the siphon pipe in the steam supply path and the external part exiting from the siphon pipe to the outside world. A heat pipe is provided between the two and the outside part is used as a heat dissipation part.

<Operation> The condensate inside the siphon pipe is prevented from being heated by the steam passing through the surrounding steam passages and re-evaporated by releasing the heat inside the siphon pipe to the outside world using a heat pipe.

<Embodiment> The figure shows one embodiment of this invention, where 1 is a cylinder, 2 is a steam supply path, 3 is a siphon pipe, and 4 is a cylinder.
is a steam locking release device.

The cylinder 1 has shafts 5 at both ends (the right half of the cylinder is not shown), and is rotatably supported by a bearing 6.

The steam supply path 2 includes a hollow shaft 5 and an inner hole 7 thereof. A rotary joint 8 is connected to the end of the shaft 5, and the rotary joint 8 has a steam inlet 9 to which a steam pipe is connected, and an internal cavity 10, which is connected to the internal hole 7 of the shaft 5. It communicates with In the figure, 11 is a rotating surface, which is hermetically sealed.

The siphon pipe 3 is provided so as to pass through the inner hole 7 of the shaft 5 with a sufficient margin, and one end is open reaching a position 1a where condensate is collected in the lower part of the cylinder 1, and the other end is open to the outside. Rotary joint 8
The steam trap 13 is connected to a steam trap 13 via a pipe 12 that passes through the pipe airtight and goes downward.

The above is the same as a conventional cylinder dryer.

The steam locking eliminating device 4 is provided with a heat pipe 14 extending between the inside of the siphon tube 3 and the outside world as shown in the figure, thereby discharging the heat inside the siphon tube 3 to the outside world. Heat is absorbed in the internal part of the siphon tube 3 and radiated in the external part. In the figure, 15 is a heat radiation fin.

According to this steam locking elimination device 4,
Even if steam is contained in the siphon pipe 3, the heat is absorbed by the heat pipe 14 and becomes condensate, and the condensate does not evaporate again, so steam locking does not occur. Therefore, condensate will flow into the steam trap 13, and the steam trap 13 will discharge the condensate.

<Effects of the invention> According to this invention, steam locking of the siphon tube in a cylinder dryer is achieved by exhausting a small amount of heat to the extent that the condensate in the siphon tube does not re-evaporate without constantly discharging steam. Since this problem can be solved, steam loss can be significantly reduced.

[Brief explanation of the drawing]

The figure is a schematic longitudinal sectional front view of the main parts of a cylinder dryer showing one embodiment of this invention. 1...Cylinder, 2...Steam supply path, 3...Siphon pipe, 4...Steam locking elimination device,
5...Shaft, 12...Piping, 14...Heat pipe, 15...Radiation fin.

Claims (1)

[Scope of utility model registration request] A cylinder whose shaft is supported by a bearing so as to rotate around a central axis, a steam supply passage provided to supply steam into the cylinder through the shaft, and a lower condensate reservoir within the cylinder. A cylinder dryer comprising a siphon pipe having one end open at a position, the other end passing through the steam supply path in the shaft and exiting to the outside world, and having a steam trap provided at the end, A steam locking eliminating device in which a heat pipe is provided between the siphon tube internal portion in the steam supply path and the outside portion that exits from the siphon tube to the outside world, and the outside portion is used as a heat radiating portion.