JP4359792B2 - Opening and closing device for ventilation damper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ventilation damper opening / closing device for manually opening / closing a damper for enclosure ventilation of a marine gas turbine used in a ship or the like when a power source such as a power failure or air is lost.
[0002]
[Prior art]
A jet generator developed for aeronautics and a fan driving turbine is removed as a gas generator, and a system that generates power by attaching a power turbine to the downstream is called an aircraft diversion gas turbine. Aircraft diversion gas turbines are suitable for high-speed ship main engines because of their features such as light weight, small size, high output, and rapid acceleration / deceleration. Up to about 20,000 tons as well as small ships such as hovercraft, hydrofoils, and high-speed boats. Many of them are used mainly for ships up to medium-sized ships.
[0003]
Gas turbines used in large ships use a package system with an enclosure to improve the engine room environment by providing both heat and sound insulation so that they can be operated not only remotely but also on the aircraft side. It has become.
[0004]
FIG. 2A is a side cross-sectional view of such an enclosure, and FIG. 2B is a view taken along arrow BB in FIG. In the figure, reference numeral 1 denotes a gas turbine having an output shaft 1a. 2 is an enclosure made of a steel plate and has a heat insulating material inside. Reference numeral 3 denotes an intake chamber that sends combustion air taken from the intake port 3 a to the turbine 1. An exhaust chamber 4 exhausts the exhaust from the turbine 1 to the outside through the exhaust port 4a.
[0005]
Reference numeral 5 denotes a ventilation opening, and a ventilation damper 6 is provided directly below. Air sucked into the enclosure 2 from the ventilation port 5 (shown by dotted lines) passes around the turbine 1 and is discharged to the outside from the discharge port 4b around the exhaust port 4a. The ventilation port 5 is provided to ventilate the enclosure 2 in order to prevent heat damage to the auxiliary equipment attached to the gas turbine main engine due to heat radiation from the turbine 1 arranged in the enclosure 2. A ventilation damper 6 is provided. This is to prevent the spread of the fire by shutting off the air supply in the event of an emergency such as a fire in addition to ventilation.
[0006]
3A is a rear view of the ventilation damper 6, and FIG. 3B is a plan view. The ventilation damper 6 is a louver type, and a plurality of (five in this example) blades 6b are attached to a rectangular frame 6a, and the blades 6b are rotatable around a rotation shaft 6c. Yes. Reference numeral 6d denotes a pneumatically operated actuator, in which the rotation shaft 6p of the actuator 6d and the rotation shaft 6c of the central wing plate 6b are directly connected. As shown in FIG. 4, an arm 6q is fixed to the rotating shaft 6p of the actuator 6d. The arm 6q and the piston rod 6r are engaged, and the reciprocating motion of the piston rod 6r is the rotating motion of the rotating shaft 6p. Is converted to The rotating shaft 6c of each wing plate 6b is extended to the back side, and an arm 6j is fixed thereto, and a connecting plate 6k is engaged with the tip of each arm 6j. Therefore, when the central slat 6b is rotated, all the other slats 6b are rotated in conjunction with each other. 6m is a limit switch for detecting opening and closing of the slats.
[0007]
FIG. 4 is a flow sheet for the operation of the actuator 6d. As shown in the figure, the actuator 6d is operated by an electromagnetic valve 6e. In addition, 6h is an accumulator, 6i is a check valve, and the accumulator 6h is provided for operating the actuator 6d when the air source is stopped.
[0008]
[Problems to be solved by the invention]
When either or both of compressed air for opening and closing the ventilation damper 6 and electricity for operating the solenoid valve 6e are stopped due to a failure or the like, the ventilation damper 6 must be manually opened and closed. Don't be. To open and close the ventilation damper 6 manually, a ratchet handle may be attached to the extension 6n on the front side of the rotating shaft 6p of the actuator 6d and rotated. At that time, if the air is confined in the actuator 6d, the ratchet handle cannot be rotated. Therefore, the bypass valve 6g provided in the bypass pipe 6f is opened, and both the air inlets of the actuator 6d are communicated.
[0009]
In order to attach or rotate the ratchet handle, an operator must enter the enclosure 2, but it cannot be entered in the event of a fire, etc. It is uncomfortable work because it is dark.
[0010]
The present invention has been devised in view of the above-described problems of the prior art, so that the ventilation damper 6 can be manually opened and closed from the outside of the enclosure 2 so that the operator can manually open and close the enclosure. The purpose is to improve the comfort and safety of the work so that it does not have to be within 2.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, an opening / closing device for a ventilation damper according to the present invention is provided to ventilate the inside of an enclosure provided surrounding a driving gas turbine, and is operated by rotating a plurality of slats to open / close. A ventilation damper opening and closing device that manually opens and closes an actuator-operated louvered ventilation damper, and connects a rotary shaft of an actuator directly connected to a rotary shaft of a slat and a manual handle provided outside the enclosure via a universal joint. A pair of air pipes connected to the actuator are connected to each other via a bypass pipe having a bypass valve provided outside the enclosure.
[0012]
Next, the operation of the present invention will be described.
A bypass pipe having a bypass valve in which a rotating shaft of an actuator for opening and closing a ventilation damper and a manual handle provided outside the enclosure are connected via a universal joint, and a pair of air pipes connected to the actuator are provided outside the enclosure. Since the connection is made through the door, the operator can perform the operation outside the enclosure when manually opening and closing the ventilation damper. Therefore, the comfort and safety of manually opening and closing the ventilation damper is improved.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view of a manual handle. As shown in FIGS. 1, 2, and 3, a ventilation port 5 is provided to ventilate an interior of the enclosure 2 provided so as to surround the driving gas turbine 1, and a louver-type ventilation damper 6 is provided immediately below the ventilation port 5. ing. The ventilation damper 6 opens and closes by rotating a plurality of blades 6b by a pneumatic actuator 6d. When air pressure or electricity stops due to failure, the ventilation damper is manually opened and closed.
[0014]
In FIG. 1, 10 is an automatic handle, and 11 is a universal joint. The manual handle 10 is provided through an opening 2a formed in the enclosure 2, and is supported by a bearing 10a that is fixedly attached to the outside of the opening 2a. The manual handle 10 and the extension 6n on the front side of the rotary shaft 6p of the actuator 6d are connected via the universal joint 11, and when the manual handle 10 is rotated, the rotary shaft 6p of the actuator 6d rotates, The rotating shaft 6c of the central slat 6b directly connected to it rotates. Since the rotating shaft 6c of each blade 6b is connected via each arm 6j and the connecting plate 6k, when the central blade 6b is rotated, all the blades 6b are rotated.
[0015]
Further, the bypass valve 6g of the bypass pipe 6f that connects the air pipes 6s connected to the actuator 6d is provided in the vicinity of the manual handle 10 outside the enclosure 2, although not shown in the drawing.
[0016]
Next, the operation of this embodiment will be described.
The rotary shaft 6p of the actuator 6d for opening and closing the ventilation damper 6 and the manual handle 10 provided outside the enclosure 2 are connected via a universal joint 11, and a pair of air pipes 6s connected to the actuator 6d are connected to the enclosure 2 Since the connection is made through the bypass pipe 6f having the bypass valve 6g provided outside, the worker can perform the operation outside the enclosure 2 when the ventilation damper 6 is manually opened and closed in an emergency. Therefore, the comfort and safety of manually opening and closing the ventilation damper 6 are improved.
[0017]
The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the invention.
[0018]
【The invention's effect】
As described above, the opening / closing device for the ventilation damper according to the present invention rotates the rotating shaft of the actuator for opening / closing the ventilation damper by the manual handle provided outside the enclosure and opens the bypass valve outside the enclosure. When manually opening and closing the ventilation damper, it is not necessary to enter the enclosure, and has excellent effects such as increased comfort and safety of the opening and closing work.
[Brief description of the drawings]
FIG. 1 is a plan view of a manual handle.
2A and 2B are drawings of a gas turbine enclosure, in which FIG. 2A is a side cross-sectional view, and FIG. 2B is a view taken along the line BB in FIG.
FIG. 3 is a drawing of a ventilation damper, (A) is a rear view, and (B) is a plan view.
FIG. 4 is a flow sheet for actuator operation.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Gas turbine 2 Enclosure 6 Ventilation damper 6b Blade 6c Blade rotating shaft 6d Actuator 6f Bypass piping 6g Bypass valve 10 Manual handle 11 Universal joint

Claims (1)

A pneumatic actuator-operated louvered ventilation damper that opens and closes by rotating a plurality of blades is provided to ventilate the interior of the enclosure that is provided around the driving gas turbine. A ventilation damper opening / closing device that can be manually opened and closed from the outside of the enclosure when the actuator stops operating due to a failure, and includes a rotating shaft of the actuator directly connected to the rotating shaft of the blade and a manual handle provided outside the enclosure. Are connected via a universal joint, and a pair of air pipes connected to a pair of piston cylinders provided on both sides of the rotation shaft of the actuator are connected to the outside of the enclosure, and manually opened and closed provided close to the manual handle. Connected via bypass piping with bypass valve , Manual opening and closing by opening the bypass valve, the ventilation damper opening and closing device, characterized by being adapted to actuators moves freely when rotating the manual handle.

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