CN212676078U

CN212676078U - Transformer for severe cold area

Info

Publication number: CN212676078U
Application number: CN202021762520.3U
Authority: CN
Inventors: 周超; 周洪刚; 冯小虎
Original assignee: Sichuan Chaojie Complete Equipment Co ltd
Current assignee: Sichuan Chaojie Complete Equipment Co ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-03-09
Anticipated expiration: 2030-08-21

Abstract

The utility model discloses a transformer used in alpine regions, which comprises a heat preservation shed and a transformer control cabinet arranged in the heat preservation shed; the top of the heat preservation shed is provided with at least one illuminating lamp, and two side walls of the heat preservation shed are respectively provided with an RL2 heating wire and an RL3 heating wire; a transformer functional module is arranged in the transformer control cabinet and comprises a voltage transformation module, a high-voltage distribution module and a low-voltage distribution module; the transformer control cabinet is fixed on the base through a bottom plate, and a plurality of through holes are formed in the side plate and the bottom plate of the transformer control cabinet; the top of the base is provided with an RL1 heating wire, and a layer of heat-conducting plate is covered on the RL1 heating wire; a plurality of supporting blocks are arranged between the heat conducting plate and the bottom plate of the transformer control cabinet; the base is arranged in a hollow way, and a constant-temperature heating circuit is integrated in the base; the constant temperature heating circuit comprises a comparator IC-A and an amplifier IC-B; a pin 3 of the comparator IC-A is electrically connected with the temperature sensor; and the 7 pins of the amplifier IC-B are electrically connected with an RL3 heating wire, an RL1 heating wire and an RL2 heating wire in sequence.

Description

Transformer for severe cold area

Technical Field

The utility model belongs to the technical field of the transformer, concretely relates to transformer is used in severe cold district.

Background

The transformers are classified into power engineering transformers and dedicated transformers (furnace wall transformers, rectifier transformers, dc experimental transformers, etc.), voltage regulators, mining transformers for preventing transformer distortion, audio transformers, high frequency transformers, impact transformers, instrument panel transformers, electronic device transformers, series reactors, transformers, etc. according to their main uses.

The vast width of our country, and the existence of high and cold areas, the extreme temperature of which reaches-52.3 ℃, make the construction process of extra-high voltage engineering face unavoidable cold and low-temperature climatic conditions. Under the low-temperature environment, when a new transformer is put into operation or an old transformer is put into operation again after overhaul, the oil paper insulation structure and the components in the transformer face the examination of the low-temperature condition, the temperature of the transformer body rises after the ultra-high voltage transformer is put into operation at low temperature, the insulation performance is reduced, breakdown accidents are easily caused, the special requirements of the transformer in high and cold areas are required to be given, and the measures required by the special requirements are met, so that the design, the manufacture, the operation and the maintenance and the fault diagnosis of the power transformer applied to the high and cold areas and the extremely cold areas are of great significance.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the above-mentioned among the prior art not enough, provide a transformer for alpine region to solve current transformer and at the not good problem of alpine region operation effect.

In order to achieve the purpose, the utility model adopts the technical proposal that:

a transformer for alpine regions comprises a heat insulation shed and a transformer control cabinet arranged in the heat insulation shed; the top of the heat preservation shed is provided with at least one illuminating lamp, and two side walls of the heat preservation shed are respectively provided with an RL2 heating wire and an RL3 heating wire; a transformer functional module is arranged in the transformer control cabinet and comprises a voltage transformation module, a high-voltage distribution module and a low-voltage distribution module; the transformer control cabinet is fixed on the base through a bottom plate, and a plurality of through holes are formed in the side plate and the bottom plate of the transformer control cabinet;

the top of the base is provided with an RL1 heating wire, and a layer of heat-conducting plate is covered on the RL1 heating wire; a plurality of supporting blocks are arranged between the heat conducting plate and the bottom plate of the transformer control cabinet; the base is arranged in a hollow way, and a constant-temperature heating circuit is integrated in the base; the constant temperature heating circuit comprises a voltage reduction resistor R1, a half-wave rectifier diode D1, a voltage stabilizing diode D2, a comparator IC-A and an amplifier IC-B which are electrically connected; a pin 3 of the comparator IC-A is electrically connected with the temperature sensor; and the 7 pins of the amplifier IC-B are electrically connected with an RL3 heating wire, an RL1 heating wire and an RL2 heating wire in sequence.

Preferably, the shell of the heat preservation shed comprises an outer shell and an inner shell, and the outer shell and the inner shell are made of 304 stainless steel.

Preferably, a plurality of polyurethane foams are uniformly filled between the outer shell and the inner shell.

Preferably, the heat conducting plate is made of copper.

Preferably, the temperature sensor is a thermocouple temperature sensor and is installed in the transformer control cabinet.

Preferably, the thermocouple temperature sensor is a M12JSS-U-0250-SL thermocouple sensor.

Preferably, the side wall of the heat preservation shed is provided with a hand-pull door.

The utility model provides a transformer for severe cold district has following beneficial effect:

the utility model discloses set up the thermal-insulation shed, set up the heater strip in it and be used for heating, keep the temperature in the thermal-insulation shed, and the thermal-insulation shed is double-deck thermal-insulated structure, can effectively reduce transformer and external heat transfer, increase the heat preservation effect in the thermal-insulation shed.

Moreover, a heating wire is arranged at the bottom of the transformer control cabinet, and the heat heats the transformer from bottom to top, so that the transformer is kept within a normal working temperature range at any time.

Except this, integrated constant temperature heating circuit in the base according to the temperature information of thermocouple temperature sensor real-time feedback, controls three heater strip and carries out the constant temperature heating for temperature in transformer switch board and the thermal-insulation shed is in the normal working range of transformer all the time, can solve the current transformer effectively and operate the not good problem of effect in alpine region.

Drawings

Fig. 1 is a structural diagram of the present invention.

Fig. 2 is a circuit diagram of constant temperature heating.

Wherein, 1, a thermal insulation shed; 2. an illuminating lamp; 3. RL2 heating wire; 4. RL3 heating wire; 5. a transformer control cabinet; 6. a through hole; 7. a temperature sensor; 8. a voltage transformation module; 9. a high voltage power distribution module; 10. a low voltage power distribution module; 11. a heat conducting plate; 12. RL1 heating wire; 13. a base; 14. a support block; 15. a base plate; 16. the door is pulled by hand.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art within the spirit and scope of the present invention as defined and defined by the appended claims.

According to an embodiment of the application, referring to fig. 1, the transformer for the alpine region in the scheme comprises a heat insulation shed 1 and a transformer control cabinet 5 arranged in the heat insulation shed 1.

Two light 2 of thermal-insulation shed 1 top installation, light 2 and mains connection provide necessary illumination for the staff when carrying out corresponding operation.

Two side walls of the heat preservation shed 1 are respectively provided with an RL2 heating wire 3 and an RL3 heating wire 4, and the RL2 heating wire 3 and the RL3 heating wire 4 are both controlled by a constant temperature heating circuit, so that the interior of the heat preservation shed 1 can be heated, and the interior of the heat preservation shed 1 can be kept at a proper temperature.

The casing of thermal-insulation shed 1 includes shell and inner shell, and the material of shell and inner shell is 304 stainless steel to evenly fill a plurality of polyurethane foam between shell and inner shell, reduce the heat transfer between the thermal-insulation shed 1 inside and outside, reduce the heat and scatter and disappear.

The side wall of the heat preservation shed 1 is provided with a hand-pull door 16, which is convenient for workers to enter and exit.

The transformer functional modules comprise a transformation module 8, a high-voltage distribution module 9, a low-voltage distribution module 10 and the like, and are all accommodated in the transformer control cabinet 5.

It should be noted that the transformer functional module is the prior art, and is not described herein again.

A plurality of through holes 6 are formed in the side plate and the bottom plate 15 of the transformer control cabinet 5, heat is transferred from the bottom to the bottom through the RL1 heating wires 12, and the heat in the heat preservation shed 1 can enter the transformer control cabinet 5 through the through holes 6 in the side plate.

The transformer control cabinet 5 is arranged on the base 13 through a bottom plate 15, and a plurality of supporting blocks 14 are arranged between the bottom plate 15 and the heat-conducting plate 11. The bottom plate 15 and the heat conductive plate 11 form a heat transfer space therebetween for heat transfer.

The heat conducting plate 11 is made of copper, and has high heat conducting efficiency.

The bottom of the heat conducting plate 11 is provided with an RL1 heating wire 12, and heat generated after the RL1 heating wire 12 is heated is transferred into the transformer control cabinet 5 through the heat conducting plate 11, so that the transformer is ensured to be in a normal working range.

Referring to fig. 2, the base 13 is hollow and has a constant temperature heating circuit integrated therein, the constant temperature heating circuit is connected with the mains supply, and the constant temperature heating circuit comprises a voltage reduction resistor R1, a half-wave rectifier diode D1, a voltage stabilizing diode D2, a comparator IC-a and an amplifier IC-B which are electrically connected; pin 3 of the comparator IC-A is electrically connected with a temperature sensor 7; the 7 pins of the amplifier IC-B are electrically connected with an RL3 heating wire 4, an RL1 heating wire 12 and an RL2 heating wire 3 in sequence.

The resistance values of the RL1 heating wire 12, the RL2 heating wire 3 and the RL3 heating wire 4 can be selected according to the specific environmental temperature, and in the embodiment, the resistance values of the RL1 heating wire 12, the RL2 heating wire 3 and the RL3 heating wire 4 are preferably 1-10 k.

The temperature sensor 7 is a thermocouple temperature sensor 7 and is arranged in the transformer control cabinet 5, and the model of the thermocouple temperature sensor 7 is an M12JSS-U-0250-SL thermocouple sensor and is used for collecting temperature information in the transformer control cabinet 5 in real time.

The working principle of the scheme is as follows:

the AC220V is used as a power supply voltage and a temperature regulation setting voltage source of a comparison device IC after R1 voltage reduction, D1 half-wave rectification, D2 clipping voltage stabilization and C1 filtering.

The pin IC-A is a thermocouple detection voltage input end (corresponding to a preset temperature value); pin ② setting voltage for temperature adjustment. After the voltages at two ends of the pin II and the pin III are compared, the voltage is output by the pin I. Where R5 functions to feed back a small fraction of the input to the non-inverting input pin so that the output lock is unchanged at small signal fluctuations. When the temperature detected by the thermocouple is lower than a preset value (the preset value is 10-20 ℃, and can be determined according to specific environments); the pin level is relatively low to the pin, so that the output pin is low. And further, the sixth pin of the IC-B amplifier is lower than the fixed offset fifth pin, and the output seventh pin is high. Since the IC-B pin voltage is divided by AC220V through R6 and R7, the frequency and phase are completely the same as AC 220V. After comparing with the DC of the leg, the AC voltage is output at the leg. The alternating voltage is reversely connected in parallel (acts as a bidirectional diode) through C2, D4, D3 and D4 to trigger a bidirectional thyristor, so that corresponding voltages are applied to an RL1 heating wire 12, an RL2 heating wire 3 and an RL3 heating wire 4 to achieve the purpose of constant temperature heating, and the transformer is suitable for the environment of high and cold areas.

The utility model discloses set up thermal-insulation shed 1, set up the heater strip in it and be used for heating, keep the temperature in thermal-insulation shed 1, and thermal-insulation shed 1 is double-deck thermal-insulated structure, can effectively reduce transformer and external heat transfer, increases the heat preservation effect in thermal-insulation shed 1.

Moreover, a heating wire is arranged at the bottom of the transformer control cabinet 5, and the heat heats the transformer from bottom to top, so that the transformer is kept within a normal working temperature range at any time.

Except this, integrated constant temperature heating circuit in base 13 according to the temperature information of thermocouple temperature sensor 7 real-time feedback, controls three heater strip and carries out the constant temperature heating for the temperature in transformer switch board 5 and heat preservation shed 1 is in the normal working range of transformer all the time, can solve the current transformer effectively and do not have the good problem of effect in severe cold district's operation.

While the present invention has been described in detail with reference to the embodiments, the scope of the present invention should not be limited to the embodiments. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.

Claims

1. The utility model provides a transformer for severe cold district which characterized in that: comprises a heat preservation shed and a transformer control cabinet arranged in the heat preservation shed; the top of the heat preservation shed is provided with at least one illuminating lamp, and two side walls of the heat preservation shed are respectively provided with an RL2 heating wire and an RL3 heating wire; a transformer functional module is arranged in the transformer control cabinet and comprises a voltage transformation module, a high-voltage distribution module and a low-voltage distribution module; the transformer control cabinet is fixed on the base through a bottom plate, and a plurality of through holes are formed in the side plate and the bottom plate of the transformer control cabinet;

the top of the base is provided with an RL1 heating wire, and a layer of heat-conducting plate is covered on the RL1 heating wire; a plurality of supporting blocks are arranged between the heat conducting plate and the bottom plate of the transformer control cabinet; the base is arranged in a hollow mode, and a constant-temperature heating circuit is integrated in the base; the constant-temperature heating circuit comprises a voltage reduction resistor R1, a half-wave rectifier diode D1, a voltage stabilizing diode D2, a comparator IC-A and an amplifier IC-B which are electrically connected; the pin 3 of the comparator IC-A is electrically connected with the temperature sensor; and the 7 pins of the amplifier IC-B are electrically connected with an RL3 heating wire, an RL1 heating wire and an RL2 heating wire in sequence.

2. The transformer for alpine regions according to claim 1, characterized in that: the shell of the heat preservation shed comprises an outer shell and an inner shell, wherein the outer shell and the inner shell are made of 304 stainless steel.

3. The transformer for alpine regions according to claim 2, characterized in that: and a plurality of polyurethane foam plastics are uniformly filled between the outer shell and the inner shell.

4. The transformer for alpine regions according to claim 1, characterized in that: the heat conducting plate is made of copper.

5. The transformer for alpine regions according to claim 1, characterized in that: the temperature sensor is a thermocouple temperature sensor and is arranged in the transformer control cabinet.

6. The transformer for alpine regions according to claim 5, characterized in that: the model of the thermocouple temperature sensor is an M12JSS-U-0250-SL thermocouple sensor.

7. The transformer for alpine regions according to claim 1, characterized in that: the side wall of the heat preservation shed is provided with a hand-pull door.