KR200193068Y1 - Apparatus for cooling magnet using air and water - Google Patents

Abstract

This design increases the cooling efficiency by ventilating the air in the cold atmosphere, and uses the seawater control device and the leak detection device to reduce the cooling water and to detect the breakage of the exciter cooling tube at an early stage. It relates to an exciter cooling device using air and water to prevent the.

The present invention has a pair of parallel wires located outside the cooler and a leak detection sensor that is connected to the wire by supplying power to the wires, and has a relay circuit electrically connected to the leak detection sensor and an electronic valve of the coolant supply pipe. Leakage detection device for early detection of rupture of the cooler tube: Equipped with a temperature sensor for measuring the temperature inside the exciter housing, and a control valve of the coolant supply pipe electrically connected to the temperature sensor. Air temperature control device for accurate temperature control of the air; and, an air intake pipe having a filter is formed at one side of the power generation chamber, and an air exhaust pipe having a natural ventilation device is formed at the other side of the power generation chamber, Including and circulating the air circulation device to increase the cooling efficiency by releasing hot internal air Provides an exciter chiller using air and water.

Description

Exciter chiller using air and water

The present invention relates to a cooling system that manages high temperature air generated in an exciter of a generator in a power plant of a general steel mill at an appropriate temperature. More specifically, the cooling efficiency is increased by ventilating air in a cold atmosphere, and the amount of seawater is controlled. The present invention relates to an exciter cooling device using air and water, which uses a device and a leak detection device to reduce cooling water and to detect breakage of the exciter cooling tube at an early stage, thereby preventing a large facility accident and delay in operation of the steel mill.

In general, self-powered generators in integrated steelworks are rotating field generators in which field stimulation is rotated. They are converted into direct current from a rotary rectifier and supplied to the rotating field of the main generator in direct coaxial direction, thus sliding contacts such as slip ring brushes. Adopts a brushless exciter that does not require And, as shown in Figure 1, the power generation flow chart shows the high-temperature, high-pressure steam of 130 kg / cm2 × 541 ° C as shown in FIG. 1, when the turbine 4 is returned to 3600 rpm. The generator 1 and the exciter 2 connected to each other rotate. At this time, the field power source from the auxiliary magnetic field 5 is supplied to the exciter 2 to generate alternating current, and the alternating current is rotated again. The main power is generated in the main generator by supplying excitation power to the generator 1 converted to direct current.

As such, the exciter system, which is composed of the core components of the power plant, is generally enclosed and soundproofed because it does not need to be repaired inside the housing to prevent dust from flowing in from the outside. Since the internal temperature is increased by the heat energy generated in the process of generating, as shown in FIG. 2, the exciter 2 is cooled to cool the air while circulating between the coolers 11 as the air generated therein in the arrow direction. The fan (7) is installed at the right end, and the medium and method for cooling the air circulated in the exciter (2) are supplied by the seawater pump (8) from the sea to boost the pump (9). Back) and discharge after heat exchange from the tube (11a) located in the casing (11b) of the cooler (11) as shown in FIG. 3 via the inlet manual valve (10). In this case, the seawater flow rate adjustment supplied to the cooler 11 for temperature management is manually adjusted as the outlet manual valve 12. However, since the seawater is used as the cooling medium, first, when the cooler tube 11a is ruptured due to salt corrosion promotion during long-term use, the supplied cooling water, that is, the seawater, flows out to the surrounding exciter 2 and the rotary rectifier 6. As a result of the burnout of electrical equipment, a large-scale accident occurs that delays the operation of the steel mill due to the power generation failure. Second, the conventional method of checking the leakage of coolant flows out of the cooler 17 when the worker inspects the site. Since it is to check the status of the situation, this can not prevent a large accident due to the delay of the emergency action time, and leads to the stop of the power plant. In addition, thirdly, when the coolant is blocked by the holes in the respective tubes 11a, the internal temperature of the housing of the exciter 2 rises so that the exciter 2 is burned out, and the vibration value of the bearing 14 rises. There is a problem in that the service life is shortened together with the efficiency decrease of the peripheral electrical equipment due to the high temperature.

The present invention has been devised to solve the conventional problems as described above, the purpose is to prevent the temperature rises in the exciter housing by the early detection and blocking of the coolant when the exciter tube breaks, as well as the coolant The present invention provides an exciter cooling device using air and water that is prevented from being scattered on a rotating machine to prevent a large equipment accident.

1 is a flow chart of power generation of a general power generation facility.

2 is a cross-sectional view of a conventional exciter cooling system.

3 is a perspective view of a conventional exciter cooler.

4 is a cross-sectional view of the exciter cooling device according to the present invention.

5 is a perspective view of the ventilator provided in the exciter cooling device using air and water according to the present invention.

6 is a detector configuration provided in the exciter cooling device using air and water according to the present invention.

* Explanation of symbols for main parts of the drawings

1: generator 2: exciter

3: see 4: turbine

5: auxiliary exciter 6: rotary rectifier

7: Fan 8: Seawater Pump

9: boosting pump 10: manual valve

11: cooler 13: excitation housing

15a: wire rod 18: main relay

19: Lamp relay 20: Alarm relay

21: relay circuit device 22: leak detection sensor

23a: temperature detection sensor 23b: electronic valve

24: control valve 25: manual valve

26: the wall 27: the ceiling

30: strainer 31: manual valve

38: tripod holder 39: cylindrical piping

In order to achieve the above object, the present invention is a cooling device that manages high temperature air generated in an exciter of a generator in a general steel mill power generation facility at an appropriate temperature, wherein the pair of side-by-side iron wires and the iron wires are located outside the cooler. A leak detection device having a leak detection sensor contacted by a coolant by supplying power, and having a relay circuit electrically connected to the leak detection sensor and an electronic valve of a coolant supply pipe to detect the air leak early when a cooler tube is broken; An air temperature control device for accurate temperature management inside the exciter housing, having a temperature detection sensor for measuring the temperature inside the excitation housing, and a control valve of a coolant supply pipe electrically connected to the temperature detection sensor; An air intake pipe with a filter is formed on one side of the air, and an air exhaust pipe with a natural ventilation device is formed on the other side of the power generation chamber to inhale cold air in the atmosphere and release hot internal air to improve cooling efficiency. Apparatus: by providing an exciter cooling device using air and water, characterized in that it comprises a.

Hereinafter, the present invention is shown in more detail according to the drawings.

Exciter cooling device using the air and water according to the present invention as shown in Figure 4 as a whole, the leak detection device 75 and the excitation housing 13 for the early detection at the time of the rupture of the cooler tube (11a) Air temperature control system for accurate temperature control, and air circulation system to improve cooling efficiency by inhaling cold air and releasing hot internal air.

As shown in FIG. 6, the leak detector 15 of the cooler tube has a cooler of FIG. 3 mounted on a non-conductor 16 made of plastic, which can fix two wires 15a about 5 cm by 3 cm. (11) fixing two wires 15 as long as the size of the longitudinal direction, and the gap between the wires 15 to maintain a gap that can be engaged if a drop of water to configure the leakage detection sensor 22 and As shown in FIG. 4, the screws are attached to both the outside of the inlet and the outlet of the cooler 11 and the outlet side housing wall of the cooler 11. In addition, the ends of the two wires 15 are connected to the control wiring to separate the water droplets when the contact is configured, the power flows, which is the x1 main relay 18 of FIG. 20) A circuit device 21 configured to operate the auxiliary relay is attached to the outside of the housing. Then, the electronic valve 23b is mounted on the seawater supply pipe so that the coolant is immediately blocked when the leak detector 15 operates.

On the other hand, the air temperature control device 23 is attached to the temperature sensor 23a on the inner wall of the outlet housing of the cooler 11 and the sea water supply inlet pipe to adjust the seawater flow rate by the signal of the temperature sensor 23a The control valve 24 is mounted, and a bypass manual valve 25 for emergency measures in case of abnormality of the control valve 24 is installed.

Next, the air circulation device 30 is divided into a suction side and an exhaust side. First, the suction side is a ceiling of the wall 26 and the cooler 11 outlet side housing 13 so as to suck air from the outside of the power generation chamber, that is, the atmosphere. Holes 73a are formed to penetrate through them, and air suction pipes 28 are welded therebetween, and in the pipes 28, manual valves 29 are respectively installed in the inlet and outlet sides in a flange shape. In the middle, the filter 30a is installed in duplicate so as to remove dust or foreign matter from the air. On the other hand, a plurality of manual valves 31 are provided at the front and rear ends of the filter 30a so as to be used for cleaning the filter 30a. On the outlet side, a hole 31a is formed at the right end of the power generation chamber ceiling 27 and the inlet side of the cooler 11, that is, the housing 13, and an internal air discharge pipe 31 is welded therebetween. At the inlet of the air discharge pipe 31, the manual valve 32 is installed in a flange shape, which is shown in FIG. 5, in the middle, the bearing on the top to be assembled while rotating the outlet-free natural ventilation device in the middle. 38) and a triangular fixing table 34 having a screw 34a at the center is welded so that the fixed shaft 33 having the circular plate 33a and the screw 33b formed at the bottom thereof is connected thereto. On the other hand, the non-powered natural ventilation device is a hole narrowed at an angle of 45 degrees to one half of the pipe size to the other side as much as the pipe diameter in order to enable natural ventilation while moving in accordance with the atmospheric wind on both sides of the cylindrical T pipe (35) ( 35a), the center of the T pipe (35) is applied to the ejector (Ejecter) principle by the dry air iron plate 36 having a 45 degree angle welded installed so that the internal air is naturally purified by the atmospheric wind, the lower part A triangular fixing rod 38 having a screw hole is installed at each of three centers of 120 degrees so that the bearing 33 is seated and fixed by a bolt 37 so as to be rotated by atmospheric wind. The tip is welded in a T shape so that the hole comes out as narrow as 2/3 of the diameter at 45 ° angle.

Hereinafter, the action and effect will be described.

In the generator exciter cooling device 100 of the present invention, when the generator 1 is operated and is in normal operation, when the filter kinetic energy is converted into thermal energy, the temperature inside the exciter housing 13 is increased, and the air circulation Is made in the direction of the arrow by the fan 7 installed on the same side of the generator (1). Therefore, the non-powered natural ventilation device is operated first for efficient management of the housing internal temperature. In more detail, by the suction power of the fan (7) installed on the same shaft of the generator (1), the cool air outside the power generation room wall (26) is cleaned through the air filter (30), and then enters the exciter (2) side. In addition, the hot air in the exciter (2) is discharged to the atmosphere by a non-powered natural ventilator installed in the atmosphere on the ceiling of the power generation room (27). Thus, during operation (exciter temperature set value 40 ℃), when the atmospheric temperature rises, such as summer, the cooling efficiency is lowered, so the air temperature control device 23 is operating at this time. That is, since the coolant control valve 24 is operated by the command of the temperature monitoring sensor 23a installed at the rear end of the exciter cooler, when the management temperature is abnormal, the opening degree is further opened so that the seawater is distributed to the exciter cooler 11 The internal temperature of the machine 2 drops.

In addition, below the prescribed temperature (40 ℃) automatically closes completely, thereby reducing the cooling water. On the other hand, when the contactor is configured in the leak detection sensor 22 by the sea water droplets when the exciter cooler tube 11a leaks due to the long time use of the air temperature control device 23, an alarm 20 is generated in the cab and The lamp 19 is turned on, and this signal is directly connected to the closing signal of the electromagnetic valve 23a to stop the supply of seawater.

Therefore, according to the present invention, the cooling efficiency is increased because the air in the cold air is ventilated, and the use of the seawater control device 23 and the leak detection device 15 reduces the cooling water and detects the leakage of the exciter cooling tube early. By doing so, practical effects such as prevention of large-scale equipment accidents and steel plant shutdowns will be obtained.

Claims (1)

In a cooling apparatus that manages high temperature air generated in an exciter of a generator in an integrated steel mill power generation facility at an appropriate temperature, a pair of side-by-side wires (15a) located outside the cooler (11) waves are supplied to the wires (15a). And a leak detection sensor 22 having a contact made by the coolant, and having a relay circuit 21 electrically connected to the leak detection sensor 22 and an electronic surface 23b of the coolant supply pipe. Leak detection device (15) for detecting this early when the hole breaks out; Equipped with a temperature detection sensor 23a for measuring the temperature inside the exciter housing 13, and a control valve 24 of the cooling water supply pipe electrically connected to the temperature detection sensor 23a, and the exciter housing 13 inside Air temperature control device 23 for accurate temperature control of the air; and, an air suction pipe 28 having a filter 30a on one side of the power generation chamber is formed, and an air discharge pipe having a natural ventilation device on the other side of the power generation chamber. Excitation cooling device using air and water, characterized in that it comprises a; 31 is formed to suck the cold air in the atmosphere and discharge the hot internal air to improve the cooling efficiency.