CN104157399A - Main transformer falling film type heat exchange device and use method - Google Patents
Main transformer falling film type heat exchange device and use method Download PDFInfo
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- CN104157399A CN104157399A CN201410402886.2A CN201410402886A CN104157399A CN 104157399 A CN104157399 A CN 104157399A CN 201410402886 A CN201410402886 A CN 201410402886A CN 104157399 A CN104157399 A CN 104157399A
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Abstract
The invention provides a main transformer falling film type heat exchange device and a use method of the main transformer falling film type heat exchange device. The main transformer falling film type heat exchange device is composed of a transformer oil flow cooling circulating system, a refrigerant medium circulating system and a control system. Transformer oil and refrigerant media of the device are not in direct contact, and heat exchange is carried out through the walls of falling film tubes of a falling film type evaporator. The control system can automatically control the transformer oil within the tube stroke of the falling film type evaporator, the transformer oil forms a film type and flows down along the inner walls of the falling film tubes, the heat exchange effect is increased, and the work of a refrigeration compressor is controlled automatically according to the temperature of oil in a transformer body. The main transformer falling film type heat exchange device has the advantages of being safe, reliable, high in cooling efficiency, small in equipment size, small in oil consumption, less in maintenance, economical in overall operating and the like, the copper and iron losses of the operating main transformer can be greatly reduced, the overloading and short circuit current resisting capacity of the main transformer is improved, the service life of the main transformer is prolonged, and the safe operation of the main transformer is guaranteed more powerfully.
Description
Technical field
The present invention relates to a kind of main transformer falling film type heat-exchanger rig and using method.
Background technology
Main transformer is in running, effect due to electricity and magnetic, its winding and iron core can generate heat, as can not be in time this heat taken away, to cause main transformer to burn the even serious accident of blast, therefore must come cooling winding and iron core by the transformer oil stream being full of in main transformer, and the heat that transformer oil stream is taken away needs to carry out heat exchange by heat abstractor, cooled cold oil stream enters transformer body again and carries out cooling.The tradition main transformer type of cooling is mainly three kinds of air blast cooling, natural air cooled and water-cooleds, although water-cooled is economical, efficiency is also high, if if generation cooling water in cooling system is to main transformer Seepage, even minor leakage also will cause serious consequence; Air-cooled because of air heat content low, make that main transformer cooling effectiveness is low, the scope that cools is very little, be subject to such environmental effects large, main transformer, heat sink apparatus are manufactured bulky, many by oil mass, operating cost is high, maintenance is large, and cause that main transformer copper iron loss is large, main transformer overload and Short Circuit withstand current capacity little, the short shortcomings that waits of insulation life.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, a kind of main transformer falling film type heat-exchanger rig and using method are provided, can take away safe, reliable, efficient, economically the heat energy that main transformer in service produces, safety, the economical operation of powerful guarantee electric power system main transformer.
The first specific embodiments of the present invention is: a kind of main transformer falling film type heat-exchanger rig, comprise that one is built-in with the transformer body of transformer Cooling oil and is arranged at the downward film evaporator of transformer body one side, described downward film evaporator comprises the housing of a sealing, in described housing, be provided with coolant media, described housing middle part is vertically arranged with several film supplying tubes, described film supplying tube is the tubular body that two ends have opening, described film supplying tube top is placed in an orifice plate, described orifice plate is divided into upper chamber and lower chambers by housing, the tube wall that described each film supplying tube stretches out orifice plate upper end is provided with film supplying tube spout hole, the sidewall on described transformer body top is provided with out deep fat electromagnetically operated valve, describedly go out deep fat electromagnetically operated valve and be connected with the upper chamber in downward film evaporator housing by the road, described downward film evaporator housing bottom is provided with downward film evaporator tube side and goes out pipe, the sidewall of described transformer body bottom is provided with into cold oil valve, described tube side go out pipe by the road with enter cold oil valve and be connected.
Further, the sidewall on described downward film evaporator lower chambers top is provided with downward film evaporator refrigerant exit, the sidewall of downward film evaporator bottom is provided with the import of downward film evaporator refrigerant, and described downward film evaporator refrigerant exit is communicated with the import of downward film evaporator refrigerant through refrigerant compressor, condenser and choke valve by the road.
Further, described orifice plate comprises plate body, and described plate body is provided with for inserting the through hole of film supplying tube, and described plate body perimembranous and downward film evaporator shell inner surface fit.
Further, in downward film evaporator housing upper chamber, be provided with oil level inductive probe, oil level inductive probe upper end is connected with the oil level inductor that stretches out upper chamber, described transformer body is provided with main transformer oil temperature sensor, described tube side go out pipe by the road with enter on the connecting line of cold oil valve to be also provided with oil pump.
Further, described condenser is air-cooled cooler condenser or water condenser.
Further, described main transformer cooling device also comprises control module, and described control module is electrically connected at oil level inductor, temperature sensor, refrigerant compressor, goes out deep fat electromagnetically operated valve.
The second specific embodiments of the present invention is: a kind of main transformer falling film type heat-exchanger rig method, comprise a kind of main transformer falling film type heat-exchanger rig as claimed in claim 6, and concrete steps are as follows:
1) open transformer body top go out deep fat electromagnetically operated valve and bottom enter cold oil valve and oil pump, the heat that in transformer body, mobile transformer oil produces main transformer winding and iron core is taken away, transformer oil self is heated and becomes heat transformer oil; The heat transformer oil that goes out the outflow of deep fat solenoid control flow to around the film supplying tube of downward film evaporator, by the uniform spout hole of film supplying tube top surrounding, along film supplying tube inwall, form membranaceous flowing down, and with downward film evaporator housing in be enclosed in film supplying tube around the low temperature cold medium of circulation carry out heat exchange, its heat is taken away by low temperature refrigerant and self is become cold transformer oil;
2) open refrigerant compressor, refrigerant compressor will become high pressure-temperature cold media gas from downward film evaporator refrigerant exit low pressure refrigerant gas compression out; The high pressure-temperature cold media gas that goes out compressor enters and in condenser, is cooled to high temperature refrigerant liquid; From condenser high temperature refrigerant liquid out through choke valve throttling to the housing of downward film evaporator, low temperature refrigerant liquid all flashes to low pressure refrigerant gas after the heat that absorbs a large amount of heat transformer oil, low pressure refrigerant gas is pumped down in refrigerant compressor and compresses again, with this iterative cycles open cold medium circulatory system;
3) cold transformer oil goes out after the outlet of downward film evaporator tube side, by oil pump, through entering cold oil valve, is beaten to transformer body, and winding and iron core are carried out to next round cool cycles;
4) sensing device of opening control system and control module, the level height that control module can arrange according to the fuel level sensor of downward film evaporator, control out deep fat electromagnetically operated valve, to guarantee that transformer oil forms in the film supplying tube of downward film evaporator, membranaceously along film supplying tube inwall, flow down; Control module is according to the work of main transformer oil temperature nonstick system of control cold compressor, when oil temperature is during higher than set point, controls refrigerant compressor and opens, and when oil temperature is during lower than set point, controls refrigerant compressor and closes.
Compared with prior art, the present invention has following beneficial effect: it is cooling that utilization of the present invention has deep fat safe and reliable, that utilize downward film evaporator to carry out in main transformer, cooling effectiveness is high, equipment volume is little, few by oil mass, safeguard less, overall operation economic dispatch huge advantage, can greatly reduce copper, the iron loss of operation main transformer, improve main transformer overload and Short Circuit withstand current capacity, extend main transformer useful life, powerful guarantee main transformer safe operation more.
Accompanying drawing explanation
Fig. 1 is the main transformer falling film type heat-exchanger rig main-process stream schematic diagram of the embodiment of the present invention;
Fig. 2 is the transformer oil stream cooling recirculation system schematic diagram of the embodiment of the present invention;
Fig. 3 is the coolant circulating system schematic diagram of the embodiment of the present invention;
Fig. 4 is the downward film evaporator structure principle chart of the embodiment of the present invention;
Fig. 5 be the embodiment of the present invention downward film evaporator in film supplying tube structure chart;
Fig. 6 is the downward film evaporator aperture plate structure chart of the embodiment of the present invention;
Fig. 7 is the vertical view of Fig. 6 of the embodiment of the present invention.
Fig. 8 is the control system Automatic Control Theory block diagram of the embodiment of the present invention.
In figure: 1-goes out deep fat electromagnetically operated valve, 2-downward film evaporator tube side inlet pipe, 3-downward film evaporator tube side goes out pipe, 4-oil pump inlet valve, 5-oil pump, 6-enters cold oil valve, 7-downward film evaporator, 8--downward film evaporator refrigerant exit, 9-refrigerant compressor, 10-condenser, 11-condenser fan, 12-condenser inlet, 13-condensator outlet, 14-choke valve, the import of 15-downward film evaporator refrigerant, 16-main transformer oil temperature sensor, 17-film supplying tube, 18-downward film evaporator tube side upper end deep fat layer, 19-orifice plate, 20-fuel level sensor probe, 21-fuel level sensor, oil film flow process in 22-film supplying tube, 23--downward film evaporator tube side lower end cold oil layer, refrigerant flow path in 24--downward film evaporator shell side, 25-film supplying tube spout hole, 26-transformer body.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
As shown in Fig. 1 ~ 8, a kind of main transformer falling film type heat-exchanger rig by transformer oil flow cooling recirculation system, (coolant media can be SF to coolant media
6or other applicable medium) circulatory system and composition of the control system.
Transformer oil stream cooling recirculation system mainly comprises: one is built-in with the transformer body 26 of transformer Cooling oil and is arranged at the downward film evaporator 7 of transformer body 26 1 sides, described downward film evaporator 7 comprises the housing of a sealing, in described housing, be provided with coolant media, described housing middle part is vertically arranged with several film supplying tubes 17, described film supplying tube 17 has the tubular body of opening for two ends, described film supplying tube 17 tops are placed in an orifice plate 19, described orifice plate 19 comprises plate body, described plate body is provided with for inserting the through hole of film supplying tube, plate body perimembranous and downward film evaporator shell inner surface fit, orifice plate 19 is divided into upper chamber and lower chambers by housing, the tube wall that each film supplying tube 17 stretches out orifice plate upper end is provided with film supplying tube spout hole 25, the sidewall on described transformer body top is provided with out deep fat electromagnetically operated valve 1, describedly go out deep fat electromagnetically operated valve 1 and be connected with the upper chamber in downward film evaporator housing by the road, described downward film evaporator 7 housing bottoms are provided with downward film evaporator tube side and go out pipe 3, the sidewall of described transformer body 26 bottoms is provided with into cold oil valve, described tube side go out pipe 3 by the road with enter cold oil valve 6 and be connected.Described tube side go out pipe 3 by the road with enter on the connecting line of cold oil valve 6 to be also provided with oil pump 5, described oil pump 5 is also connected with oil pump inlet valve 4.
The operation principle of main transformer falling film type heat-exchanger rig circulation of oil flow system:
Transformer body top go out deep fat electromagnetically operated valve 1, transformer body bottom enter cold oil valve 6, oil pump 5 and oil pump inlet valve 4; Mobile transformer oil starts to circulate in transformer body, and the heat that main transformer winding and iron core produce is taken away, and transformer oil self is heated and becomes heat transformer oil; The heat transformer oil that goes out the 1 control outflow of deep fat electromagnetically operated valve flow to downward film evaporator tube side inlet pipe 2, the upper end that enters evaporator tube side part forms downward film evaporator tube side upper end deep fat layer 18, oil is by the uniform spout hole 25 of film supplying tube 17 top surroundings, along film supplying tube 17 inwalls, form membranaceous flowing down, and with downward film evaporator shell side in refrigerant flow path 24 be enclosed in tube side around the low temperature cold medium of circulation carry out heat exchange, form downward film evaporator tube side lower end cold oil layer 23, its heat is taken away by low temperature refrigerant and self is become cold transformer oil; Cold transformer oil goes out downward film evaporator tube side and goes out after pipe 3, by oil pump 5, through entering 6 dozens, cold oil valve to transformer body 26, winding and iron core is carried out to next round cool cycles.
(coolant media can be SF to coolant media
6or other applicable medium) circulatory system mainly comprises: the sidewall on described downward film evaporator lower chambers top is provided with downward film evaporator refrigerant exit 8, the sidewall of downward film evaporator bottom is provided with downward film evaporator refrigerant import 15, and described downward film evaporator refrigerant exit 8 is communicated with downward film evaporator refrigerant import 15 through refrigerant compressor 9, condenser 10 and choke valve 14 by the road.
The operation principle of coolant circulating system: refrigerant compressor 9 will become high pressure-temperature cold media gas from downward film evaporator refrigerant exit 8 low pressure refrigerant gas compression out; The high pressure-temperature cold media gas that goes out compressor 9 enters in condenser 10, and condenser side is provided with condenser fan 11, is cooled to high temperature refrigerant liquid; From condensator outlet 13 high temperature refrigerant liquid out, through choke valve 14 throttlings, flow to downward film evaporator refrigerant import 15, enter the refrigerant flow path 24 in downward film evaporator shell side; Now because causing part high temperature refrigerant liquid rotating, volume sudden enlargement becomes low pressure refrigerant gas, cooling medium liquid evacuator body becomes in the process of gas can a large amount of heat absorptions and whole cooling medium liquid temperatures are sharply declined, and after the heat of the low temperature refrigerant liquid interior a large amount of heat transformer oil of film supplying tube 17 in absorbing evaporator after temperature declines, all flash to low pressure refrigerant gas; Low pressure refrigerant gas goes out after evaporator refrigerant exit 8, is pumped down to again compression in refrigerant compressor 9, with this iterative cycles.
In order better to realize the operation to said mechanism, control, the present invention has also designed a kind of main transformer falling film type heat-exchanger rig control system and has specifically comprised: described main transformer cooling device also comprises control module, in downward film evaporator housing upper chamber, be provided with oil level inductive probe 20, oil level inductive probe 20 upper ends are connected with the oil level inductor 21 that stretches out upper chamber, described transformer body is provided with main transformer oil temperature sensor, described tube side go out pipe by the road with enter on the connecting line of cold oil valve to be also provided with oil pump.Described control module is electrically connected at oil level inductor 21, temperature sensor 16, refrigerant compressor 9 deep fat electromagnetically operated valves 1 etc.
Its groundwork principle: the level height that control module can arrange according to the fuel level sensor of downward film evaporator, control out deep fat electromagnetically operated valve, to guarantee that transformer oil forms in the film supplying tube of downward film evaporator, membranaceously along film supplying tube inwall, flow down; Control module can also be according to the program of prior design programming, according to the data that are arranged on main transformer top oil temperature sensor and transmit, the work of nonstick system of control cold compressor, when oil temperature is during higher than set point, control refrigerant compressor is opened, and when oil temperature is during lower than set point, controls refrigerant compressor and closes.
Above-mentioned a kind of main transformer falling film type heat-exchanger rig using method concrete steps are as follows:
1) open transformer body top go out deep fat electromagnetically operated valve and bottom enter cold oil valve and oil pump, the heat that in transformer body, mobile transformer oil produces main transformer winding and iron core is taken away, transformer oil self is heated and becomes heat transformer oil; The heat transformer oil that goes out the outflow of deep fat solenoid control flow to around the film supplying tube of downward film evaporator, by the uniform spout hole of film supplying tube top surrounding, along film supplying tube inwall, form membranaceous flowing down, and with downward film evaporator housing in be enclosed in film supplying tube around the low temperature cold medium of circulation carry out heat exchange, its heat is taken away by low temperature refrigerant and self is become cold transformer oil;
2) open refrigerant compressor, refrigerant compressor will become high pressure-temperature cold media gas from downward film evaporator refrigerant exit low pressure refrigerant gas compression out; The high pressure-temperature cold media gas that goes out compressor enters and in condenser, is cooled to high temperature refrigerant liquid; From condenser high temperature refrigerant liquid out through choke valve throttling to the housing of downward film evaporator, low temperature refrigerant liquid all flashes to low pressure refrigerant gas after the heat that absorbs a large amount of heat transformer oil, low pressure refrigerant gas is pumped down in refrigerant compressor and compresses again, with this iterative cycles open cold medium circulatory system;
3) cold transformer oil goes out after the outlet of downward film evaporator tube side, by oil pump, through entering cold oil valve, is beaten to transformer body, and winding and iron core are carried out to next round cool cycles;
4) sensing device of opening control system and control module, the level height that control module can arrange according to the fuel level sensor of downward film evaporator, control out deep fat electromagnetically operated valve, to guarantee that transformer oil forms in the film supplying tube of downward film evaporator, membranaceously along film supplying tube inwall, flow down; Control module is according to the work of main transformer oil temperature nonstick system of control cold compressor, when oil temperature is during higher than set point, controls refrigerant compressor and opens, and when oil temperature is during lower than set point, controls refrigerant compressor and closes.
The foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (7)
1. a main transformer falling film type heat-exchanger rig, it is characterized in that, comprise that one is built-in with the transformer body of transformer Cooling oil and is arranged at the downward film evaporator of transformer body one side, described downward film evaporator comprises the housing of a sealing, in described housing, be provided with coolant media, described housing middle part is vertically arranged with several film supplying tubes, described film supplying tube is the tubular body that two ends have opening, described film supplying tube top is placed in an orifice plate, described orifice plate is divided into upper chamber and lower chambers by housing, the tube wall that described each film supplying tube stretches out orifice plate upper end is provided with film supplying tube spout hole, the sidewall on described transformer body top is provided with out deep fat electromagnetically operated valve, describedly go out deep fat electromagnetically operated valve and be connected with the upper chamber in downward film evaporator housing by the road, described downward film evaporator housing bottom is provided with downward film evaporator tube side and goes out pipe, the sidewall of described transformer body bottom is provided with into cold oil valve, described tube side go out pipe by the road with enter cold oil valve and be connected.
2. a kind of main transformer falling film type heat-exchanger rig according to claim 1, the sidewall on described downward film evaporator lower chambers top is provided with downward film evaporator refrigerant exit, the sidewall of downward film evaporator bottom is provided with the import of downward film evaporator refrigerant, and described downward film evaporator refrigerant exit is communicated with the import of downward film evaporator refrigerant through refrigerant compressor, condenser and choke valve by the road.
3. a kind of main transformer falling film type heat-exchanger rig according to claim 1, described orifice plate comprises plate body, and described plate body is provided with for inserting the through hole of film supplying tube, and described plate body perimembranous and downward film evaporator shell inner surface fit.
4. a kind of main transformer falling film type heat-exchanger rig according to claim 1, in downward film evaporator housing upper chamber, be provided with oil level inductive probe, oil level inductive probe upper end is connected with the oil level inductor that stretches out upper chamber, described transformer body is provided with main transformer oil temperature sensor, described tube side go out pipe by the road with enter on the connecting line of cold oil valve to be also provided with oil pump.
5. a kind of main transformer falling film type heat-exchanger rig according to claim 4, described condenser is air-cooled cooler condenser or water condenser.
6. a kind of main transformer falling film type heat-exchanger rig according to claim 4, described main transformer cooling device also comprises control module, described control module is electrically connected at oil level inductor, temperature sensor, refrigerant compressor, goes out deep fat electromagnetically operated valve.
7. a main transformer falling film type heat-exchanger rig method, comprises a kind of main transformer falling film type heat-exchanger rig as claimed in claim 6, and concrete steps are as follows:
1) open transformer body top go out deep fat electromagnetically operated valve and bottom enter cold oil valve and oil pump, the heat that in transformer body, mobile transformer oil produces main transformer winding and iron core is taken away, transformer oil self is heated and becomes heat transformer oil; The heat transformer oil that goes out the outflow of deep fat solenoid control flow to around the film supplying tube of downward film evaporator, by the uniform spout hole of film supplying tube top surrounding, along film supplying tube inwall, form membranaceous flowing down, and with downward film evaporator housing in be enclosed in film supplying tube around the low temperature cold medium of circulation carry out heat exchange, its heat is taken away by low temperature refrigerant and self is become cold transformer oil;
2) open refrigerant compressor, refrigerant compressor will become high pressure-temperature cold media gas from downward film evaporator refrigerant exit low pressure refrigerant gas compression out; The high pressure-temperature cold media gas that goes out compressor enters and in condenser, is cooled to high temperature refrigerant liquid; From condenser high temperature refrigerant liquid out through choke valve throttling to the housing of downward film evaporator, low temperature refrigerant liquid all flashes to low pressure refrigerant gas after the heat that absorbs a large amount of heat transformer oil, low pressure refrigerant gas is pumped down in refrigerant compressor and compresses again, with this iterative cycles open cold medium circulatory system;
3) cold transformer oil goes out after the outlet of downward film evaporator tube side, by oil pump, through entering cold oil valve, is beaten to transformer body, and winding and iron core are carried out to next round cool cycles;
4) sensing device of opening control system and control module, the level height that control module can arrange according to the fuel level sensor of downward film evaporator, control out deep fat electromagnetically operated valve, to guarantee that transformer oil forms in the film supplying tube of downward film evaporator, membranaceously along film supplying tube inwall, flow down; Control module is according to the work of main transformer oil temperature nonstick system of control cold compressor, when oil temperature is during higher than set point, controls refrigerant compressor and opens, and when oil temperature is during lower than set point, controls refrigerant compressor and closes.
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| CN201410402886.2A CN104157399B (en) | 2014-08-18 | 2014-08-18 | A kind of main transformer falling film type heat-exchanger rig and using method |
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Cited By (2)
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| CN106024316A (en) * | 2016-08-09 | 2016-10-12 | 胡启元 | Intelligent heat-radiating transformer |
| CN108966611A (en) * | 2018-09-11 | 2018-12-07 | 广东合新材料研究院有限公司 | A kind of liquid-immersed cooled interchanger and group of switches |
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| CN106024316A (en) * | 2016-08-09 | 2016-10-12 | 胡启元 | Intelligent heat-radiating transformer |
| CN108966611A (en) * | 2018-09-11 | 2018-12-07 | 广东合新材料研究院有限公司 | A kind of liquid-immersed cooled interchanger and group of switches |
| CN108966611B (en) * | 2018-09-11 | 2024-05-28 | 广东西江数据科技有限公司 | Liquid immersion cooling type exchanger and exchanger unit |
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