JPH11153391A - Air motor driving device in rotary regenerating heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce work effort for maintenance and inspection work of a rotary regenerating heat exchanger and enable sure and efficient execution of the work, by providing a means for remote-controlling a valve for starting and stopping operation provided in an air line for supplying air to an air motor. SOLUTION: In ordinary operation, a main valve 7a and operation valves 7b, 7c are opened, a bypass valve 7d and operation valves 7f, 7g are closed and a solenoid valve 7e is opened in an air line to an air motor 6. In maintenance and inspection work, the main valve 7a is opened, the operation valves 7b, 7c are closed, the solenoid valve 7e is closed and the operation valves 7f, 7g, 12, 15 and a main valve 21 are opened, and switching to operation by instrument housing box 8 is carried out. That is, the operation box 19 is operated so as to open a solenoid valve 10 and air is fed to the air motor 6, and valve opening of a rotation speed regulating control valve 11 is controlled so as to regulate rotation speed of a rotor, and maintenance and inspection work are effected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an operation device of an air motor in a rotary regenerative heat exchanger used for a heater of a power generation boiler plant, for example.

[0002]

2. Description of the Related Art Generally, a rotary regenerative heat exchanger is constructed as shown in FIG.
As shown in FIG. 3, while the rotor 1 having the heat storage body 1a is rotating around the rotation shaft 1b, the heat of the heating fluid flowing in the duct 2 is stored in the heat storage body 1a to heat the fluid to be heated. Has become. During normal operation, the rotor 1 is driven by the motor 3 to reduce the speed reducer 4 and the pinion gear 5a.
-It is rotationally driven via the pin rack 5b.

[0003] In the air line to the air motor 6 during the normal operation of the rotary regeneration type heat exchanger, the main valve 7a, the operation valves 7b and 7c are open, and the bypass valve 7d and the electromagnetic valve 7e are closed. At the time of a power failure of the rotary regeneration heat exchanger, the electromagnetic valve 7e is opened by a signal from a central operation control panel (not shown), and the air is sent to the air motor 6 to continue the operation.

Conventionally, during maintenance and inspection work of the rotary regenerative heat exchanger, since the power supply for operation control is shut off, automatic operation such as starting and stopping of the rotor 1 by the electric motor 3 cannot be performed, and only the air motor is used. 6 was driving. The air motor 6 also rotates the rotor 1 via the speed reducer 4 and the like.

During operation of the air motor 6, an operator is arranged on the side of the air motor 6, and a signal or communication is made to the operator from within the duct 2 of the heat exchanger or from another remote work place. According to the signal and communication,
The operator of the air motor 6 opens and closes the bypass valve 7d to start and stop the air motor 6. Further, particularly when the regenerative heat exchanger is of a horizontal type, braking has been performed by a coupling portion 3a between an electric motor 3 for rotatingly driving the rotor 1 and a reduction gear 4.

[0006]

However, in the above-described conventional apparatus, there is a problem in that an extra operator must be arranged on the air motor side during maintenance and inspection work, and it takes time to confirm safety before starting rotor operation. In addition to the points, even if the air motor is stopped, the rotor rotates due to its inertial force, so that it is difficult to stop the rotor at a desired position.

The present invention has been made in order to solve the above-mentioned conventional problems, and an object of the present invention is to save labor for maintenance and inspection work of a rotary regenerative heat exchanger and to reduce the work. An object of the present invention is to provide an air motor operating device in a rotary regeneration type heat exchanger that can be performed reliably and efficiently.

[0008]

Means for Solving the Problems An operation device of an air motor in a regenerative heat exchanger of the present invention includes a driving unit for rotationally driving a rotor having a built-in heat accumulator for transmitting heat of a heating fluid to a fluid to be heated. In the rotary regenerative heat exchanger, an air motor for power failure or maintenance and inspection work of the heat exchanger is provided as the driving means in addition to the usual electric motor, and a starter and an air pipe for supplying air to the air motor are provided. A means for remotely controlling a valve for a stop operation is provided. It is also characterized in that means for braking the electric motor at the same time as the operation of stopping the air motor is provided. In addition, by providing a rotation speed control valve of the air motor,
It is also characterized in that means for remotely controlling this is added.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of an air motor driving device according to the present invention.
The reduction gear 4, the pinion gear 5a, the pin rack 5b, the air motor 6, the air pipe 7, and various valves 7a to 7e
The same as the above-mentioned conventional device is shown.

In FIG. 1, reference numeral 8 denotes an equipment storage box, in which an air pipe 9 for an air motor, a solenoid valve 10 for an air motor, and a small electric control valve 1 for adjusting a rotation speed are provided.
1, an air motor operation valve 12, a brake air pipe 13, a brake electromagnetic valve 14, and a brake operation valve 15 are accommodated. 16 is the electromagnetic valve 1
An electric control circuit for controlling 0, 11 and 14.

A solid disk 17 is fixed to the rotating shaft 3 b of the electric motor 3, and is braked by a brake device 18. The brake device 1
8 is an air chamber 18 as shown in FIG.
a, a rod 18b, arms 18c and 18d, and brake pads 18e and 18f.

The electric control circuit 16 has a start / stop /
An operation box 19 for speed adjustment operation and a stop button box 20 for stop-only operation are connected by wire or wirelessly. 21 is an original valve.

Since the air motor driving device of the present embodiment is configured as described above, the air line to the air motor 6 during the normal operation includes the main valve 7 a and the operation valve 7.
b, 7c are open, bypass valve 7d, operation valve 7f,
7g is closed and the electromagnetic valve 7e is open. At the time of maintenance and inspection work, the air line to the air motor 6 has the main valve 7a open, the operation valves 7b and 7c closed, the electromagnetic valve 7
e is closed, the operation valves 7f, 7g, 12, 15 and the main valve 21 are opened, and the operation is switched to the operation in the equipment storage box 8.

In the operation of the equipment storage box 8, first, the operation box 19 is operated to open the electromagnetic valve 10 by a signal from the electric control circuit 16, and air is sent to the air motor 6. Further, the opening degree of the small-sized electric control valve 11 for adjusting the rotation speed is adjusted to change the amount of air, and the rotation speed of the rotor 1 is arbitrarily adjusted to perform maintenance and inspection work.

When the rotating rotor 1 closes the electromagnetic valve 10 by a signal from the operation box 19 or the stop button box 20, the supply of air to the air motor 6 is stopped and starts to stop. At the same time, the electromagnetic valve 14 is opened and air is sent to the air chamber 18a of the brake device 18, and the rod 18b is pushed out in the direction of the arrow to open the arms 18c and 18d at the same angle in the direction of the arrow. When the arms 18c and 18d are opened, the brake pads 18e and 18f operate in the direction of the arrow, sandwiching the solid disk 17 and stopping the rotor 1.

The solid disk 17 and the brake device 18 are usually installed during maintenance work, but may be installed permanently. Further, the brake device 18 is not limited to the above configuration, but may be configured so that the brake pads 18e and 18f are expanded when air is supplied and the solid disk 17 is sandwiched when the air is stopped. Any method may be used.

[0017]

[Effects of the Invention] By using the operating device of the air motor at the time of maintenance and inspection work of the rotary regenerative heat exchanger, it is not necessary to arrange an operating operator for operating the valve of the air pipe, and it is possible to save labor. became. Further, there is no trouble in confirming before the rotation of the rotor is started, a communication error is avoided, the rotor can be stopped at a desired position, and safety is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of an air motor driving device according to the present invention.

FIG. 2 is an explanatory diagram of a brake device.

FIG. 3 is a diagram (A) and a side sectional view (B) of a conventional rotary regeneration heat exchanger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotor 1a Rotating shaft 2 Duct 3 Electric motor 3a Coupling 3b Rotating shaft 4 Reduction gear 5a Pinion gear 5b Pin rack 6 Air motor 7 Air piping 7a Main valve 7b Operating valve 7c Operating valve 7d Bypass valve 7e Electromagnetic valve 7f Operating valve 7g Operating valve 8 Equipment storage box 9 Air pipe for air motor 10 Electromagnetic valve for air motor 11 Small electric control valve for rotation speed adjustment 12 Operating valve for air motor 13 Air pipe for brake 14 Electromagnetic valve for brake 15 Operation valve for brake 16 Electric control circuit 17 Solid disk 18 Brake device 18a Air chamber 18b Rod 18c Arm 18d Arm 18e Brake pad 18f Brake pad 19 Operation box 20 Stop button box 21 Original valve

Claims (3)

[Claims] 1. A rotary regenerative heat exchanger having a driving means for rotating a rotor having a built-in heat accumulator for transmitting heat of a heating fluid to a fluid to be heated, wherein the driving means includes a power failure in addition to a normal electric motor. A motor for air-conditioning or maintenance of a heat exchanger, and a means for remotely controlling a valve for start and stop operation provided in an air pipe for supplying air to the air motor. Operating device for air motors in a heat exchanger. 2. The operating device for an air motor in a rotary regenerative heat exchanger according to claim 1, further comprising means for braking the electric motor simultaneously with a stop operation of the air motor. 3. The air motor operating device in a rotary regenerative heat exchanger according to claim 1, wherein a valve for controlling the rotation speed of the air motor is provided, and means for remotely controlling the valve is provided. .