JP2007240051A - Air-bleeding structure of water cooling type horizontal rotator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-bleeding structure capable of eliminating accumulation of air in a water cooling-type horizontal rotator with a simple structure. <P>SOLUTION: In this air-bleeding structure of the internal water cooling-type horizontal rotator 4 cooled by supplying and discharging the cooling water to the inside of the rotator 4 of which shaft end portions 6, 8 at both ends are horizontally rotatably journaled by bearings 5, one shaft end portion 6 is connected to a water supply channel 12, a drain pipe 13 used also for air-bleeding is fixed to the other shaft end portion 8 at a drainage side in a state of being rotated with the rotator 4, an intake 17 of the drainage pipe 13 positioned in the rotator 4 is positioned near an inner peripheral face of the rotator 4 in a separated state from a shaft center level of the rotator 4, and an end portion of the drainage pipe 13 is connected with a drainage channel 16 through a swivel joint 15. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air vent structure for removing air from a water-cooled horizontal rotating body that rotates horizontally and is internally cooled by cooling, such as a screw conveyor exposed to a high-temperature atmosphere, a lower screw conveyor of a continuous casting apparatus, and the like. .

  In the waste melting facility, a water-cooled horizontal rotating screw conveyor in which cooling water flows to discharge dust to the bottom of the combustion chamber is disposed (see Patent Document 1), and the lower part of the waste heat boiler of the heat recovery facility A water-cooled, horizontally rotating screw conveyor for discharging dust is disposed (see Patent Document 2).

  FIG. 4 is a view showing a conventional example of a water-cooled horizontal rotating body. In the example shown in FIG. 4A, the rotating body 30 has a water supply side shaft end portion 31 and a drain side shaft end portion 32 at both ends rotatably supported by bearings 33, and the cooling water is indicated by arrows in the figure. Then, the water is supplied from the water supply side shaft end portion 31 to the inside of the rotating body 30 and is drained from the drain side shaft end portion 32.

  In FIG. 4 (a), since water is drained from the shaft end portion 32, when the inner diameter of the water passage portion of the rotator 30 is larger than the drain side shaft inner diameter, the portion of the rotator 30 at or above the drain side shaft end portion level is air. The pool 34 becomes non-water-cooled, and the skin beyond the drain side shaft end level becomes non-water-cooled. Due to the rotation, the iron skin is repeatedly undesirably affected by repeated heat effects of heating and cooling.

  Therefore, various air venting structures have been proposed in order to remove the air accumulated in the rotating body. In the rotating body 30 shown in FIG. 4B, the drain side is a double-tube swivel joint structure 36 to which the air bleeding pipe 35 can be fixed, and the tip of the air bleeding pipe 35 is positioned at the upper end of the inner surface of the rotating body 30. To remove air.

Further, in the rotating body 30 shown in FIG. 4 (c), the core 37 is disposed in the rotating body, and the water flow rate around the core 37 is increased by increasing the water flow velocity at the outer peripheral portion of the rotating body to drain the air. The shaft is pushed out to the end.
JP 2001-41430 A JP 2001-41431 A

  However, the air vent shown in FIG. 3B is unstable because the air vent pipe 35 is fixed to the swivel joint 36 and is supported in a cantilever state through the drain shaft end 32. There is.

  Further, the air vent shown in FIG. 3 (c) requires a high water pressure and a large amount of water, and has a problem of lack of certainty.

  Therefore, the present invention provides an air vent structure that can eliminate an air reservoir of a water-cooled horizontal rotating body with a simple structure.

  The present invention relates to an air vent structure for an internal water-cooled horizontal rotating body in which cooling water is supplied to a rotating body whose shaft ends at both ends are pivotally supported by bearings so as to be horizontally rotatable, and then drained and cooled. Is connected to the water supply channel, and a drain pipe that also functions as an air vent that rotates with the rotating body is fixed to the shaft end of the other drainage side, and the position of the intake of the drain pipe located in the rotating body is It is located near the inner peripheral surface of the rotating body separated from the shaft center, and the end of the drainage pipe is connected to the drainage channel via a swivel joint.

  In addition, the present invention provides an air vent structure for an internal water-cooled horizontal rotating body that supplies and drains cooling water into a rotating body that is rotatably supported at both ends by a bearing. The water supply guide pipe that rotates together with the rotating body is fixed to the shaft end on the drain side, the drain pipe is disposed in the water supply guide pipe, the water intake of the drain pipe protrudes from the water supply guide pipe, and the position of the protruding water intake The end of the water supply guide pipe is connected to the water supply path through the swivel joint, and the end of the drainage pipe is connected to the drainage path. It is characterized by being.

  According to the present invention, the water intake port of the drain pipe is submerged and drained by the rotation operation by the rotation of the drain pipe, and the air is lost by entering the air reservoir portion. As a result, formation of the non-cooled portion can be suppressed.

  In addition, since the drain pipe is fixed to the drain side shaft end of the screw shaft, the drain pipe can be stably supported with a simple structure as compared to the cantilever support penetrating the rotating shaft shown in FIG. Become.

  Moreover, it is also possible to make it the structure which can supply and drain water from one axial end part, and since the other axial end part should just be supported with a bearing, the equipment around water can be simplified.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic view showing the entire structure of a rotating body provided with an air vent pipe according to the present invention, and FIG. 2 is a schematic cross-sectional view showing a support structure of the air vent pipe for discharging ash to the bottom of the combustion chamber 1. Fig. 5 shows an example in which a screw conveyor 4 having screw blades 3 on a screw shaft 2 is arranged as a rotating body.

  1 and 2, the hollow screw shaft 2 is provided on the wall of the screw casing 7 with a water supply side shaft end 6 rotatably supported by a shaft sealing device 5 provided on the wall of the combustion chamber 1. A drain side shaft end 8 is rotatably supported by the shaft sealing device 5.

  A water supply pipe 9 connected to the water supply side shaft end 6 is rotatably supported by a bearing 10, and an end of the water supply pipe 9 is connected to a water supply path 12 by a swivel joint 11 to be rotatable. Further, since the inner diameters of the water supply side shaft end 6 and the drainage side shaft end 8 are smaller than the furnace inner shaft inner diameter, the drainage pipe 13 serving both as an air vent and a drain is fixed to the drainage side shaft end 8.

  The drain pipe 13 is rotatably supported by the bearing 14. When the end of the drain pipe 13 is connected to the drain path 16, the end of the drain pipe 13 is connected to the drain path 16 so as to be rotatable by the swivel joint 15. Is done. The water intake 17 of the drain pipe 13 is positioned near the end of the screw shaft 2, and the position is separated from the axis of the screw shaft 2 and is positioned near the inner peripheral surface of the screw shaft 2.

  Cooling water is supplied into the screw shaft 2 through a water supply path 12, a swivel joint 11, a water supply pipe 9, and a water supply side shaft end 6, and the cooling water in the screw shaft 2 is supplied to an intake port 17 of a drain pipe 13 and a drain pipe. 13, drained into the drainage channel 16 through the swivel joint 15.

  The screw shaft 2 is rotated through a chain 19 and a sprocket 20 by a rotary drive device 18.

  In the present embodiment, the drainage pipe 13 rotates and drains air from the intake port 17 of the drainage pipe 13 that rotates together with the drainage pipe 13.

  In addition, since the drain pipe 13 is fixed to the drain side shaft end 8 of the screw shaft 2, the drain pipe 13 can be stabilized by a simple structure as compared with the cantilever support penetrating the rotating shaft shown in FIG. Support is possible.

  Further, by positioning the water intake 17 of the drain pipe 13 near the inner peripheral surface of the screw shaft 2, the air accumulation in the screw shaft 2 is eliminated, and the cooling water is almost filled in the screw shaft 2. That is, the formation of the non-cooled portion can be suppressed.

  FIG. 3 is a schematic sectional view showing another embodiment of the drain pipe support structure. The same members as those in FIG. The present embodiment is an example in the case where water supply and drainage are performed only from one end of the screw shaft 2.

  A water supply guide pipe 21 is fixed to the water supply side shaft end portion 8 of the screw shaft 2, and the water supply guide pipe 21 is rotatably supported by a shaft seal device 5 and a bearing 14 provided on the wall of the screw casing 7. The end of 21 is pivotally supported by the bearing 23 of the double tube swivel joint 22 so as to be rotatable.

  A drainage pipe 13 is disposed in the hollow portion of the water supply guide pipe 21, and the drainage pipe 13 is supported by the water supply guide pipe 21 on the intake port 17 side and supported by a bearing 24 of the double pipe type swivel joint 22. . As with the first embodiment, the drain pipe 13 is positioned away from the axial center of the screw shaft 2 and located near the inner surface of the screw shaft 2 to suppress the formation of an air reservoir.

  Cooling water supplied from the double-pipe swivel joint 22 from the water supply passage 12 is supplied from the end of the screw shaft 2 into the screw shaft 2 via the water supply guide tube 21. The cooling water that has cooled the screw shaft 2 is drained into the drainage channel 16 through the swivel joint 22 via the drainage pipe 13 that rotates together with the water supply guide pipe 21.

  Also in this embodiment, due to the rotation of the drain pipe 13, the water intake 17 of the drain pipe 13 is submerged and drained by the rotating operation, and the air is lost by entering the air reservoir portion. Therefore, the formation of the non-cooled portion can be suppressed.

  Moreover, since the drain pipe 13 is supported by the bearing 24 of the water supply guide pipe 21 and the swivel joint 22, the drain pipe 13 can be stably supported with a simple structure.

  In addition, since one shaft end is simply supported by a bearing, it is possible to simplify equipment around the water.

FIG. 1 is a schematic view showing the entire cross section of a rotating body provided with an air vent pipe according to the present invention. It is a schematic sectional drawing which shows the support structure of a drain pipe. It is a schematic sectional drawing which shows another Example of the support structure of a drain pipe. It is a figure which shows the prior art example of a water cooling type horizontal rotating body.

Explanation of symbols

1: Combustion chamber 2: Screw shaft 3: Screw blade 4: Screw conveyor 5: Bearing 6: Water supply side shaft end 7: Screw casing 8: Drainage side shaft end 9: Water supply pipe 10: Bearing 11: Swivel joint 12: Water supply path 13: Drainage pipe 14: Bearing 15: Swivel joint 16: Drainage path 17: Water intake 18: Rotation drive device 19: Chain 20: Sprocket 21: Water supply guide pipe 22: Double pipe type swivel joint 23: Bearing 30: Rotating body 31: Water supply side shaft end 32: Drainage side shaft end 33: Bearing 34: Air reservoir 35: Air vent pipe 36: Double pipe type swivel joint 37: Core

Claims (2)

In the air bleed structure of the internal water-cooled horizontal rotator that cools water by supplying and draining cooling water into the rotator that is pivotally supported by the bearing so that the shaft ends of the both ends are horizontally rotatable.
The position of the water intake of the drain pipe, where one shaft end is connected to the water supply channel, and the other drain side shaft end is fixed to the drain pipe that also functions as an air vent that rotates with the rotating body, and is located inside the rotating body. Is located near the inner peripheral surface of the rotating body away from the axis of the rotating body,
An air vent structure for a water-cooled horizontal rotating body, characterized in that an end of the drain pipe is connected to a drain channel through a swivel joint. In the air bleed structure of the internal water-cooled horizontal rotator that feeds and drains cooling water into the rotator that is rotatably supported by the shaft ends at both ends by the bearings,
A water supply guide pipe that feeds cooling water into the rotating body and rotates together with the rotating body is fixed to the shaft end on the drainage side, a drainage pipe is arranged in the water supply guide pipe, and the water intake of the drainage pipe protrudes from the water supply guide pipe. , The position of the protruding water intake is located near the inner peripheral surface of the rotating body away from the axis of the rotating body,
An air vent structure for a water-cooled horizontal rotating body, wherein an end of a water supply guide pipe is connected to a water supply path via a swivel joint, and an end of the drainage pipe is connected to the drainage path.

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