KR200167361Y1 - Cooling apparatus of generator - Google Patents

Abstract

The hot water generated in the generator exciter during operation of the power plant is maintained at the proper temperature, and sea water is leaked due to the tube crack of the air cooler that uses the sea water as a cooling medium. The present invention relates to a cooling device of a generator exciter capable of preventing a large accident that is stopped, and to a coolant (101) for preventing cooling water from scattering outside the air cooler (22a) and to the cooling water flowing out when the tube (22f) breaks. In order to detect the pore state by the automatic detector 200 is installed in the lower portion of the water tank 23, the inclined bottom surface, the inlet and outlet valves 103 and 104 of the cooling sea water of the air cooler 22a and the air discharge solenoid valve The air suction side of the exciter protection housing 9 is detected by detection signals of the air cooler chamber 22d having the 110 on the side, and the coolant shut-off solenoid valves 103 and 104 and the autodetector 200. And times Since the side doors 126 and 128 are automatically opened by the hydraulic piston device 123, the door is opened automatically by the hydraulic piston to prevent the temperature inside the exciter protection housing from rising rapidly. There is an effect to prevent large equipment accidents and delays in the operation of the steel mill due to the air hole tube breakage.

Description

Chiller of generator exciter

1 is a schematic diagram showing a circulation system of a general power generation facility.

2 is a schematic cross-sectional view showing a configuration and a cooling system of a conventional exciter.

Figure 3 is a schematic cross-sectional view showing a cooling system of the exciter according to the present invention.

Figure 4 is a perspective view of the exciter cooler according to the present invention.

Figure 5 is a perspective view of the exciter air cooling device according to the present invention.

* Explanation of symbols for main parts of the drawings

1: boiler 2: high pressure steam supply line

3: high pressure turbine casing 4: high pressure turbine

5: overcross line 6: low voltage turbine

7: low-pressure turbine casing 8: generator

9: exciter protection housing 10: steam outlet

11: vacuum pump 12: condenser

13: water feed pump 14: sea water pump

15: drainage channel 20: bearing

21: rotary rectifier 22a: air cooler body

22d: air cooler chamber 22e: element

22f: cooler tube 23: sump

24: air cooler support 25: give magnetic

26a: Cooling water supply valve 26b: Cooling water discharge valve

27a: sump drain valve 28: exciter

29: concrete floor 100: comb fixture

101: comb window 102: solenoid valve

103: cooling water (sea water) supply solenoid valve 104: cooling water (sea water) discharge solenoid valve

105: sump drain solenoid valve 106: float ball

107a: permanent magnet inside the nonmagnetic plate 107b: permanent magnet outside the nonmagnetic plate

108a: limit switch 108b: alarm contact line

109: non-magnetic plate 110: air exhaust solenoid valve

120: closed side pneumatic supply line 121: open side pneumatic supply line

122: bolt 123: pneumatic piston

124: pneumatic body 125: pin

126: air supply door 127: feldspar

128: air discharge door 200: automatic detector

The present invention relates to a cooling device of a generator exciter, and particularly, to a tube crack of an air cooler that uses sea water as a cooling medium by maintaining high temperature air generated in a generator exciter at an appropriate temperature during operation of a power generation facility. The present invention relates to a cooling device of a generator exciter capable of preventing large accidents in which seawater flows out and damages an internal device to stop the entire power generation facility.

FIG. 1 is a schematic diagram showing a circulation system of a general power generation facility. The high pressure turbine 4 is rotated through a high pressure steam supply line 2 by receiving a pressure of 130 kg / cm 2 and steam at 538 ° C. from the boiler 1. After the low pressure turbine 6 is rotated by the pressure of 20 kg / cm 2 and the steam at 538 ° C. through the over cross line 5, it is discharged to the condenser 12 through the steam outlet 10.

In the condenser 12, the steam discharged from the steam outlet 10 may heat-cool the seawater supplied from the seawater pump 14 through a tube in the condenser 12, and the thus-exchanged seawater may be discharged to the drain 15. do.

At this time, the steam cooled in the condenser 12 is reduced in volume, the vacuum pump 11 to discharge the non-condensing gas generated at this time to the atmosphere, to form a vacuum (about -760mmhg) in the condenser 12 ) Is installed.

Here, the condensed water is again supplied to the boiler 1 through the feed water pump 13, and recirculated from the boiler 1 to repeat the circulation process supplied to the turbine.

The high pressure turbine 4 and the low pressure turbine 6 rotated at a high speed (3,600 RPM) through the above process rotate the generator 8 and the exciter 9 connected to the same shaft. Power is generated in the generator 8 using the excitation power from 9).

2 is a schematic cross-sectional view showing a configuration and a cooling system of the conventional exciter. When the steam is supplied to the high-pressure turbine 4 and the low-pressure turbine 6 of FIG. 1 and rotates, the generator 8 and the exciter 9 are also shown. At this time, the field power from the magnetic field magnetizer 25 is supplied to the exciter 28 to generate alternating current, and the alternating current is converted into direct current in the rotary rectifier 21 to supply the excitation power to the generator. To generate power.

The grant magnetic device 25, exciter 28, the rotary rectifier 21 is driven in direct connection to the generator side is installed on the shaft end of the turbine shaft is configured to supply the excitation power to the generator rotor to produce and supply the main power .

In this way, the exciter device composed of the core parts of the power generation equipment generates a fixation when the dust continuously enters or the temperature rises. Therefore, as shown in FIG. An air cooler 20a is provided to pass through and cool the air.

However, since seawater is used as the cooling medium, a number of problems occur as follows.

First, the coolant supplied at the time of tube breakage of the cooler causes damage of the exciter (9) and the rotary rectifier (21) around, causing a large accident in which steelworks operations are delayed due to impossibility of power generation.

Second, on-site inspection is performed to confirm that the coolant is leaked into the tube breaker of the cooler. The power generation facility is delayed due to the delay of the action time when the tube 22f is broken. A major accident up to the point of stopping occurs.

Third, the exciter is burned out by the temperature rise in the exciter protection housing 9 when the coolant 22a shuts off the coolant, thereby shortening the life of the surrounding electric device due to the increase in bearing vibration and the high temperature.

Fourth, the bottom of the discharge sump 23 is horizontal when the coolant flows out due to the hole 22f of the tube 22f of the cooler 22a, and when the coolant is leaked, the drain is not well discharged. It is leaked to cause damage to the electrical equipment, such as this has a problem that a huge loss occurs.

The present invention was devised to solve the conventional problems as described above, so that the coolant is not scattered to the electrical equipment side when the air cooler tube of the generator exciter during the power generation equipment operation, the coolant is quickly shut off and the exciter protection housing inside It is an object of the present invention to provide a cooling device of the generator exciter that can prevent the temperature rises rapidly and prevent a large equipment accident in advance.

In order to achieve the above object, the cooling device of the generator exciter of the present invention has a comb grate to prevent the coolant from scattering on the outside of the air cooler, and when the tube is broken, the bottom surface thereof is inclined to detect the pore state by the flowing coolant. The exciter protection housing is provided by an automatic detector installed at the bottom of the collection tank, an air cooler chamber having an inlet / outlet valve and an air discharge solenoid valve of the cooling seawater of the air cooler, and detection signals of the coolant shutoff solenoid valve and the automatic detector. It consists of a hydraulic piston device that opens the air inlet and outlet doors automatically.

Therefore, the cooling device of the generator exciter of the above structure prevents the temperature inside the exciter protection housing from rising sharply by automatically opening the door by the hydraulic piston.

EXAMPLE

Hereinafter, the cooling device of the generator exciter of the present invention will be described in detail with reference to the accompanying drawings. The same parts as the conventional description will be described with the same reference numerals.

Figure 3 is a schematic cross-sectional view showing a cooling system of the exciter according to the present invention, Figure 4 is a perspective view of the exciter cooler according to the present invention, Figure 5 is a perspective view showing the exciter air cooling device according to the present invention.

As shown in FIG. 3, the shatterproof comb 101 is fixed to the comb holder 100 to prevent the coolant from scattering due to the supply coolant pressure when the cooler tube is broken and the equipment is burned out. The grate holder 100 is fixed to the sump 23 and the exciter protection housing 9.

In addition, the water collecting tank 23 shown in FIGS. 3 and 4 eliminates the discharge defects at the time of cooling water outflow due to the planar structure as shown in FIG.

The discharge plug 22c is provided with a line and a solenoid valve 102 so as to be automatically discharged in an emergency, and the inlet and outlet valves 103 and 104 of the sea water used for cooling the air cooler 22a and the air cooler ( 22a) An air discharge solenoid valve 110 is installed on the side of the air cooler chamber 22d for discharging the internal air or discharging the cooler coolant well.

The automatic detector 200 by the outflow cooling water for detecting the cooler tube breakage and the sump drain solenoid valve 105 for discharging the water in the sump 23 are connected to the lower part of the sump 23.

As shown in FIG. 4, the automatic detector 200 includes a float ball 106, a nonmagnetic plate inner permanent magnet 107a, a nonmagnetic plate outer permanent magnet 107b, a limit switch 108a, and an alarm contact line. It consists of 108b.

Therefore, when the coolant tube breakthrough causes the outflow coolant to flow into the sump 23 and reaches the detector 200, the nonmagnetic plate 109 is interposed between the non-magnetic plate 109 so that an alarm sounds in the cab and the apparatus. When the permanent magnet 107a is attached and the outflow coolant is collected and filled up, the float ball 106 is raised.

The outer permanent magnet 107b provided on the outer side on the opposite side is configured to move by the force of the inner permanent magnet 107a. In addition, the upper limit of the outer permanent magnet (107b) is provided with a limit switch (106a) is configured to alarm in the cab and the device by the alarm contact line 108b during operation.

5 is related to the exciter air cooling device. When the cooler tube 22f breaks and blocks the seawater which is cooling water, the temperature in the exciter protection housing 9 rises rapidly, resulting in an increase in bearing vibration and fatal damage to the electric machine. Therefore, to compensate for this, the air supply side door 126 and the air discharge side door 128 installed in the exciter protection housing 9 are configured to be opened automatically by the detection signal of the autodetector 200.

The air supply side door 126 and the air discharge side door 128 are installed in the exciter protection housing 9 by the feldspar 127 and the pin 125 so that they can be opened by hand, but the exciter can be opened automatically. Pneumatic switchgear is installed on top of the protective housing (9).

The opening and closing device fixes the pneumatic body 124 to the exciter protection housing 9 with a bolt 122, and inserts a pneumatic piston 123 to the inside so that the air supply side door and the discharge side door 126, 128 It is fixed to the upper side and is configured to be opened and closed by the pneumatic pressure of the closing side and the open side pneumatic supply line (120), 121.

20 is a bearing part, 22b is a zinc tube installed in the air cooler chamber 22d, 24 is an air cooler support, 26a is a coolant supply valve, and 26b is a coolant discharge valve.

Referring to the operation of the present invention configured as described above are as follows.

When the cooler tube 22f of FIG. 4 breaks out and coolant flows out, the comb 101 shown in FIG. 3 is prevented from scattering to the outside, and the sump discharge valve 27a of FIG. 4 is closed and the drain solenoid valve 105 ) To be open.

Therefore, the leaked coolant is collected in the water collecting tank 23 installed at the lower part, and when the lower automatic detector 200 is reached, the float ball 106 is raised upward and the inner permanent magnet 107a connected to the same side. Will go down.

As a result, the outer permanent magnet 107b outside the nonmagnetic plate 109 is raised to operate the limit switch 200 to generate an alarm in the cab and the device through the alarm contact line 108b.

When the limit switch 200 is operated in this way, the coolant (sea water) supply solenoid valve 103 and the coolant (sea water) discharge solenoid valve 104 are closed so that no more coolant flows out, followed by the air discharge solenoid valve 110 and air. The cooler chamber discharge solenoid valve 102 opens to completely discharge the coolant remaining in the air cooler 22a.

The hydraulic opening and closing device 124 shown in FIG. 5 has an air supply side door 126 and an air discharge side door 128 which are closed at the same time as the coolant is blocked in order to prevent the internal temperature of the exciter protection housing 9 when the coolant is blocked. When opened automatically by the pneumatic piston 123, the air is introduced and discharged by the generator shaft rotational force as shown by the arrow shown in FIG. 5, resulting in the effect of lowering the temperature of the internal air.

As described above, according to the cooling device of the generator exciter of the present invention, the coolant tube breakhole prevents the cooling water from being scattered, and also prevents the peripheral device from being burned out. Since the hydraulic switchgear is installed in order to discharge the coolant and prevent the sudden temperature rise in the exciter protection housing due to the coolant shutoff, there is an effect of preventing the large-scale equipment accident and the delay of the steel mill due to the hole of the tube of the air cooler.

Claims (1)

Comb window 101 to prevent the coolant from scattering outside the air cooler 22a, and installed in the lower part of the collecting tank 23 whose bottom is inclined to detect the pore state by the cooling water flowing out when the tube 22f breaks. An air cooler chamber 22d provided with an automatic detector 200, an inlet and outlet valve 103, 104 and an air discharge solenoid valve 110 for cooling seawater of the air cooler 22a, and a coolant shutoff. Hydraulic piston for automatically opening the air suction side and discharge side doors 126, 128 of the exciter protection housing 9 by detection signals of the solenoid valves 103, 104 and the autodetector 200. Cooling device of the generator exciter, characterized in that consisting of a device (123).