CN2235180Y

CN2235180Y - Automatic thermostatic drying device for inductance coil

Info

Publication number: CN2235180Y
Application number: CN 95234462
Authority: CN
Inventors: 姚传江; 梁宏辉; 陈锡元; 秦笃峰
Original assignee: 姚传江
Priority date: 1995-08-21
Filing date: 1995-08-21
Publication date: 1996-09-11
Anticipated expiration: 2005-08-21

Abstract

The utility model relates to an automatic thermostatic drying device for inductance coil which is composed of a power input circuit, a control circuit, a voltage regulating device, a current heating circuit and an electrical measurement device. The automatic thermostatic drying device for inductance coil is characterized in that the control circuit adopts a temperature control circuit; the current heating adopts direct current heating. The automatic thermostatic drying device for inductance coil is suitable for various on site drying processes of the inductance coil of electrical apparatus, and avoids dismounting and transporting of the electrical apparatus; overcomes defects of scorch and damage to the insulation of the coil caused by high temperature, and extends the drying time caused by low temperature, etc. The automatic thermostatic drying device for inductance coil has the advantages of favorable performance of automatic constant temperature, wide range of temperature control regulating, convenient operation, labor and material resources saving and enhanced work efficiency.

Description

Inductance coil automatic constant-temperature drying device

The utility model relates to a kind of inductance coil automatic constant-temperature drying device, on the dried after the coil (winding) that is mainly used in electric equipments such as transformer, instrument transformer, motor makes moist.

In electric power system, the coil of electric equipments such as widely used transformer, instrument transformer, the motor phenomenon of making moist is recurrent, this is carried out dried, is the problem of paying close attention to for electricity consumption department and electric equipment maintaining unit always.Mainly adopt so far (is example with the transformer coil dried): one, use drying baker, in the processing of drying chamber inner drying, but this need tear the fortune transformer open, both bothers, and transformer idle time is long again, and only is applicable to middle-size and small-size transformer; Two, induction is dry, and the method need be coiled magnetizing coil on the shell of transformer, and heating time is long, also needs insulation, and cumbersome; Three, short-circuit method, this method consumes power is big, applied voltage height, dangerous, high voltage source is difficult for obtaining, and only is applicable to that middle-size and small-size transformer slightly makes moist, also the incompatibility shell type transformer; Four, zero sequence method, this method need be changed winding wiring, also only is applicable to middle-size and small-size transformer.And this method heating is inhomogeneous, and utilization voltage height, dangerous also can not be used for shell type transformer; Five, field for Large Transformer eddy current vacuum, hot-air seasoning, this method device therefor is many, as vacuum pump, air exhauster, eddy current coil, heater, filter etc., and must be incubated, and power consumption is big, and it is very inconvenient to work together.In a word, above-mentioned existing apparatus and method all have certain scarce limit and deficiency.

The purpose of this utility model, exactly in order to overcome above-mentioned the deficiencies in the prior art, provide a kind of can automatic constant-temperature, temperature adjustment, and the power saving that can save time, easy to use, the inductance coil automatic constant-temperature drying device that is applicable to various electric equipments.

The utility model realized by following technical scheme, and it is by power supply input circuit 1, control circuit 2, and regulator 3, current flow heats circuit 4, electric probe device 5 is formed, and it is characterized in that control circuit adopts temperature-control circuit, and the current flow heats circuit adopts DC heating.

Shown in Figure of description, its control circuit 2, i.e. temperature-control circuit, it has only two couples of temperature contact W by one _xHeight and W _xLow temperature relay is as long as one has a pair of normally closed interlock ZJ ₁The voltage relay ZJ that gets final product is as long as one has four pairs often to open QC ₁, QC ₂, QC ₃, QC ₄With a pair of normally closed QC ₅The A.C. contactor QC of contact, the pilot bulb IHD of an intensification, a cooling and ILD constitute; Its circuit is connected to, by W _xHeight and ZJ and QC ₁, W _xWith QC and ZJ, QC ₅With ILD, QC ₃Primary coil and QC with regulator 3 ₄The two ends of the series circuit after being connected in series respectively all are connected to power supply and export on two line a and the b, and IHD one terminates at ZJ and QC ₁Contact on, one terminates at a mutually on the electricity.Its current flow heats circuit 4 promptly is the DC heating circuit, it is the alternating current circuit loop of drawing from the secondary coil of regulator 3, rectifying component D in being serially connected with this circuit becomes DC loop, the inductance coil that needs dried is serially connected with on M in this loop and the N contact constitute.Its regulator 3 is automatic coupling voltage regulator TZ.

The utility model is owing to having adopted temperature control, inductance coil self having been carried out the dry circuit of DC heating automatic constant-temperature, and dried is carried out at the scene of can arriving at any time.Avoid effectively tearing open the fortune electric equipment, and since the temperature that in the past can not temperature control causes high burn, destroy drawbacks such as coil insulation, warm low drying time is long, it is good to have the automatic constant-temperature performance, the temperature control adjusting range is big, be applicable to various electric equipment inductance coils, applied range, advantage such as easy to use and reliable.Have shortening drying time simultaneously, save human and material resources, positive effect such as increase work efficiency.

This Figure of description is that the structure of this utility model and the electrical connection principle of used electronic parts are also used figure.Wherein the with dashed lines frame show for structure chart, it 1 is a power supply input circuit, it takes from 220 volts of phase line a of civil power and zero line b, by double-pole switch ZK and two fuse RD ₁, RD ₂And and the power supply indicator ED that connects constitute.It 2 is a control circuit, and what the utility model adopted is temperature-control circuit, W among the figure _xHeight and W _xLow is the high temperature closure of the setting of expression temperature relay, two pairs of contacts of cold seal-down; ZJ is the voltage relay coil, ZJ ₁It is its normally closed interlock; QC is an ac contactor coil, QC ₁, QC ₂, QC ₃, QC ₄And QC ₅Four couple who is this contactor respectively often opens, a pair of normally closed interlock; IHD and ILD heat up and the cooling indicator light.It 3 is a regulator, and it is automatic coupling voltage regulator TZ.It 4 is current flow heats circuit, what the utility model adopted is the DC heating circuit, x, y are the double-end contacts of secondary coil from regulator 3 voltage regulators among the figure, D is the rectifying component that is serially connected in from the ac voltage circuit that x, y draw, and M, N are inductance coil two tip nodes that need be dried.It 5 is electrical measurement, and A and V among the figure are serial connections and be connected to ammeter and voltmeter in the DC heating circuit loop.

Below in conjunction with embodiment, operation principle process of the present utility model is described further.In fact this Figure of description is exactly the structure principle chart of an embodiment of the present utility model.Its course of work is, ED is bright when the ZK power supply indicator that closes a switch, and it exports two line a and b has just had alternating voltage, this moment temperature relay low temperature contact W _xLow since decide dry minimum temperature and also be higher than the environment actual temperature, so W _xLow is closed, and the ZJ of voltage relay ₁Normally closed interlock also is closed, at this moment by W _xHang down and QC and ZJ ₁The circuit two ends of serial connection are connected to out-put supply a, b two lines and constitute path, the ac contactor coil QC adhesive of switching on, its QC ₁, QC ₂, QC ₃, QC ₄Often open for four pairs and become closure, intensification indicator light IHD energising is bright, and QC ₅By the normally closed open circuit that becomes, cooling indicator light ILD does not work.The energising of voltage regulator TZ primary winding, at this moment the DC heating circuit working regulates voltage regulator, and the electric current that ammeter is indicated reaches the needed respective value of the inductance coil that is dried, and this inductance coil is under the thermal effect effect of electric current, and self being heated is dried.Through certain hour, when temperature reaches the high dry temperature of needs, the W of temperature relay in the control circuit _xHigh contact becomes closure by often opening, the adhesive of voltage relay ZJ coil electricity, its ZJ ₁Normally closed often becoming opens, and A.C. contactor QC coil blackout discharges, and intensification indicator light IHD goes out, and ILD is bright for the cooling indicator light, the outage of voltage regulator primary winding, and the DC heating circuit also cuts off the power supply.When cool to naturally when deciding minimum temperature, temperature relay W _xLow closed again, start A.C. contactor once more, the DC heating circuit is started working again.Therefore, as long as the W of temperature relay _xHeight and W _xLow contact is transferred on the needed the highest and minimum temperature-limited value, just can realize the purpose of the automatic constant-temperature drying of inductance coil self.

Claims

1. inductance coil automatic constant-temperature drying device, it is by power supply input circuit 1, control circuit 2, regulator 3, current flow heats circuit 4, electrical measurement 5 is formed, and it is characterized in that control circuit adopts temperature-control circuit, and the current flow heats circuit adopts DC heating.

2. inductance coil automatic constant-temperature drying device as claimed in claim 1 is characterized in that described temperature-control circuit, and it has only two couples of temperature contact W by one _xHigh W _xLow temperature relay is as long as one has a pair of normally closed interlock ZJ ₁The voltage relay ZJ that gets final product is as long as one has four pairs often to open QC ₁, QC ₂, QC ₃, QC ₄With a pair of normally closed QC ₅The A.C. contactor QC of contact, the pilot bulb 1HD of an intensification, a cooling and 1LD constitute; Its circuit is connected to, by W _xHeight and ZJ and QC ₁, W _xHang down and QC and ZJ ₁, QC ₅And ILD, QC ₃Primary coil and QC with regulator 3 ₄The two ends of the series circuit after being connected in series respectively all are connected to power supply and export on two line a and the b, and IHD one terminates at ZJ and QC ₁Contact on, one terminates at a mutually on the electricity, QC ₂Two contacts and W _xLow two ends also connect.

3. according to claim 1 or 2 described inductance coil automatic constant-temperature drying devices, it is characterized in that described DC heating circuit, it is the alternating current circuit loop of drawing from the secondary coil of regulator 3, rectifying component D in being serially connected with this circuit, become DC loop, the inductance coil of needs drying is serially connected with on the M in this loop and the N contact constitutes.

4. inductance coil automatic constant-temperature drying device as claimed in claim 1 is characterized in that described adjustment pressure device 3, is automatic coupling voltage regulator TZ.