JP2006310671A - Winding method and winder of voltage transformer coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding method of a voltage transformer coil in which degradation in insulation reliability is avoided when the voltage transformer coil under winding is disconnected or an overlap phenomenon occurs by the overriding of a coil wire. <P>SOLUTION: In the winding work of a voltage transformer coil having a tight multilayer winding structure where the coil wire of an insulation covered wire is wound tightly layer by layer around a core into multilayer structure by means of a winder and an insulation layer of an insulation film as an interlayer insulation material is provided between respective layers, when the coil wire under winding is disconnected or an overlap phenomenon occurs by the overriding of the coil wire, the winder is stopped temporarily and the coil wire is rewound up to one turn before the end on one inner layer side at the part of disconnection or overlap and then the coil wire is jointed at the end position of the inside layer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a voltage transformer coil winding method for winding a voltage transformer coil used in a gas-insulated switchgear and a voltage transformer coil winding apparatus.

The voltage transformer used for the gas insulated switchgear is configured as shown in FIGS. 7 and 8, for example. FIG. 7 is a structural view of a part of the voltage transformer, and FIG. 8 is a structural view of the coil showing a part of the coil in cross section.
The coil 1 having this configuration has a multilayer structure in which a coil wire 3 of an insulating coated electric wire having a small diameter is tightly wound around a winding core 2 formed of an insulating cylinder, and an interlayer insulating material 4 of an insulating film is inserted between each layer. Thus, the axial cross section is formed in a trapezoidal shape, and a shield 5 is attached to the outer peripheral portion so that electric field concentration does not occur. The shield 5 is accommodated in a sealed container 6 as shown in FIG. An insulating spacer 7 is provided on the part.
As a winding device for winding a coil having a trapezoidal cross section in the axial direction as shown in FIG. 8, for example, Patent Document 1 discloses a method for manufacturing a trapezoidal coil.
The manufacturing method of the trapezoidal coil of patent document 1 cut | disconnects both sides so that the width | variety of the insulating film of an interlayer insulation may become narrow corresponding to the winding width | variety which becomes narrow as a coil is wound and a diameter becomes large, and it is on the coil surface. The supply method is taken.

  In this configuration, by supplying an insulating film with a reduced width as the outer diameter of the coil portion increases, the coil end surface is wound up in a taper shape, and the axial cross-section is trapezoidal without performing post-winding processing. It can be finished.

In addition, when supplying insulating tape for interlayer insulation, each wound layer must be supplied to a predetermined position in a direction perpendicular to the coil axis, but the interlayer supplied correctly to a predetermined position of the coil For example, Patent Document 2 discloses a method for supplying insulation.
In the method of supplying the insulating tape disclosed in Patent Document 2, the end of the insulating tape is attached to the surface of the coil that has been wound for each layer with a single-sided adhesive tape using a sticking roller, and the winding tape is rotated to wind the insulating tape. A method is disclosed.

Japanese Patent Laid-Open No. 04-337615 Japanese Utility Model Publication No. 05-072122

A conventional voltage transformer coil winding device is configured as described above, and in Patent Document 1, since it is cut into a predetermined width before insertion and inserted between coil layers, processing is not performed after winding. In Patent Document 2, the end of the insulating tape is attached to the surface of the coil that has been wound for each layer with a single-sided adhesive tape piece using a sticking roller. Although it is the method of rotating and winding an insulating tape, the means corresponding to the trouble in winding is not disclosed.
The voltage transformer coil has a configuration in which an insulation-coated electric wire having a small diameter is wound as a coil wire, closely wound for each layer, and an insulating layer using an insulating film having a thin thickness as an interlayer insulating material is provided between each layer. .
When the voltage transformer coil configured in this way is wound, an overlapping phenomenon may occur due to the disconnection of the coil wire or the running of the coil wire. If a connection is made at the disconnection position in the case of a disconnection, the connecting portion becomes thick, so if the connection position is in the middle of the winding layer, excessive stress will be applied to the adjacent coil wire, and there is a problem that affects the insulation performance. is there. In addition, if the winding is continued in a state where the overlapping phenomenon has occurred, there is a possibility that excessively stress is locally applied to the coil wire material in contact with the overlapping portion and the insulation coating of the coil wire may be broken, resulting in a decrease in insulation reliability. There is a point.

  The present invention has been made to solve the above-described problems, and in the event of a disconnection during winding of the voltage transformer coil or an overlap phenomenon due to the coil wire running, a voltage without reducing the insulation reliability. An object of the present invention is to provide a winding method for a voltage transformer coil for winding a transformer coil, and to provide a winding device for a voltage transformer coil that realizes the winding method.

  The voltage transformer coil winding method according to the present invention includes a winding device in which a coil wire of an insulation-coated electric wire is closely wound around a core and wound in a multilayer structure, and an insulating film is interposed between the layers. When winding a voltage transformer coil with a multilayer winding structure with an insulating layer as an insulating material, when the coil wire breaks during winding, or when the coil wire overlaps during winding In the winding method, the winding device is temporarily stopped, the winding wire is rewound up to one turn before the inner end of one layer of the portion where the disconnection or overlap phenomenon occurs, and the coil wire material is connected at the inner layer terminal position.

  When a wire breakage or overlap phenomenon occurs in the winding of the voltage transformer coil, remove the part where the insulation performance of the coil part is concerned and remove the coil wire breakage or coil wire overlap phenomenon. By using the inner layer termination portion of the layer where the occurrence of the voltage is set as the connection position, it is possible to obtain a voltage transformer coil in which a decrease in insulation performance is avoided and insulation reliability is ensured.

Embodiment 1 FIG.
The voltage transformer of the gas insulated switchgear is generally configured as shown in FIG. 7 and FIG. 8, and when winding the coil having such a configuration, the coil wire breaks during the winding or the coil wire climbs up. When an overlap phenomenon occurs due to the above, it is necessary to take measures so that the insulation performance does not deteriorate.
If a break in the coil wire 3 occurs during the winding of the coil 1 of the voltage transformer of FIG. 8, the connection portion is connected, but the connection portion has a thick wire diameter. When the connecting portion having a large wire diameter is set at the intermediate position of the wound layer, excessive stress is locally applied to the adjacent coil wire material.
In addition, if winding is continued when an overlap phenomenon occurs, excessive stress is locally applied to the coil wire material in contact with the overlap portion, which in any case affects the insulation performance and decreases the insulation reliability. There is a problem to do.
The first embodiment requires a winding method for a voltage transformer coil that avoids a decrease in insulation reliability when a disconnection or an overlapping phenomenon of coil wires occurs during coil winding.

For example, the end of the winding layer of the voltage transformer coil 1 shown in FIG. 8 is configured as shown in FIG. An insulating layer between predetermined layers is inserted by sandwiching the tip of the interlayer insulating material 4 between the coil wire 3 at the end of the tightly wound portion and winding the coil wire 3 together with the interlayer insulating material 4 a predetermined number of times.
In the case of the coil having the trapezoidal cross section configured as described above, when the coil wire 3 is disconnected during winding, the insulation coating of the coil wire 3 is peeled off and twisted and soldered. The diameter of the part is at least twice the strand diameter. If the thickened connecting portion is positioned in the middle of the layer that is tightly wound, local excessive stress is applied to the adjacent coil wire 3, and the insulating coating may be broken, affecting the insulating performance. It will be. In addition, even if an overlapping phenomenon occurs due to the coil wire rod 3 being run, there is a possibility that local excessive stress is similarly applied to the adjacent coil wire rod 3 and the insulation coating of the coil wire rod is broken.

  The connection position when the coil wire 3 is disconnected during winding is such that the close winding end where the coil wire is not wound on the upper layer of the coil wire 3 is easy to insert the interlayer insulating material 4 into the connection, Since the coil wire 3 is not disposed on the upper layer, the terminal portion of the wound layer wound tightly is the optimum position where connection can be made without degrading the insulation reliability. 1c of FIG. 1 is a coil wire connection part.

  When a winding phenomenon is detected during winding of the voltage transformer coil, if the coil wire 3 is disconnected or an overlap phenomenon due to the coil wire 3 being run over is detected, the winding device is temporarily stopped, and the portion where the disconnection or the overlap phenomenon occurs is detected. Rewind one turn before the end of the inner layer, connect the coil wire at the end position of the inner layer, and place the inter-layer insulating material 4 between the connecting portion and the adjacent coil wire 3 to make the adjacent coil wire Insulation performance is ensured without applying stress to 3, and a voltage transformer coil that avoids a decrease in insulation reliability can be wound.

Embodiment 2. FIG.
As the coil wire 3 of the voltage transformer coil according to the first embodiment, an insulation-coated electric wire with a small diameter, and as the interlayer insulation 4, for example, an adhesive that is bonded when heated on one side disclosed in Japanese Patent Application Laid-Open No. 2004-193410 A polyester film coated with is used.
FIG. 2 is a structural diagram of a winding device for a voltage transformer coil according to the second embodiment.
The winding device includes a coil winding mechanism 10, an interlayer insulating material supply means 30, an interlayer insulating material insertion means 40, a scrap discharging means 50, and a dancer roller mechanism 60.
The interlayer insulating material supply means 30 is arranged at the upper part of the moving carriage 20, and the interlayer insulating material insertion means 40 is arranged at the lower part of the interlayer insulating material supply means 30 of the moving carriage 20, and the moving carriage 20 supports the rail 21 on the coil 21. It is configured to be movable back and forth by the drive mechanism 22 in the direction of the table 11.

  The coil winding mechanism 10 includes a coil support base 11 for mounting the winding core 2 and winding the coil wire 3, a coil wire support base 13 for supporting the coil wire drum 3 a around which the coil wire 3 is wound, and a coil The guide wheel 15 that guides the wire 3 toward the coil support 11, the wire guide mechanism 16 that guides the coil wire 3 to the winding position of the outer diameter portion of the coil 1 during winding, and the guide wheel 15 are equipped. The wire breakage detecting means 17 for detecting the wire breakage of the coiled wire 3 and the overlap detection for constantly monitoring the position of the outer surface of the winding portion of the surface of the coil 1 during winding and detecting the overlapping phenomenon due to the coil wire 3 being run up And means 18.

  The disconnection detecting means 17 receives a reflected light reflected from the surface of the coil wire 3 by receiving a light source for projecting light to the coil wire 3 passing through the portion of the guide wheel 15 and the coil wire 3. It consists of a detection sensor that detects the position, and is in an operating state so that it is constantly monitored during operation of the winding device. The installation position of the disconnection detection means 17 may be any position as long as the coil wire 3 is supplied.

  As shown in FIG. 3, the overlap detection means 18 irradiates a laser beam toward the winding position of the coil wire 3 on the surface of the coil 1 being wound, and continuously detects the position of the surface of the coil 1. The sensor 18a, the amplifier 18b for amplifying the position signal detected by the position sensor 18a, and the A / D converter 18c for A / D converting the position signal can be detected even if there is a minute change in the surface position. Is.

This overlap detection means 18 always detects the position of the coil wire 3 of the coil 1 during the operation of the winding device, and outputs it as an abnormal signal even if the detected position changes momentarily. When the position of the coil wire rod 3 is changed with respect to the immediately preceding position, an overlap abnormality signal is output as an overlap phenomenon.
When the overlap abnormality signal from the overlap detection means 18 is input, the control device temporarily stops the winding device and outputs an overlap abnormality alarm.

  The interlayer insulating material supply mechanism 30 includes an interlayer insulating material 4 from a supply table 31 for transferring the interlayer insulating material 4 to the surface of the coil 1 being wound, and an interlayer insulating material roll 4 a suspended from the interlayer insulating material roll support base 14. The guide roll 32 that supplies the material to the supply table 31, the brake roll 33 that adjusts the feed speed of the supplied interlayer insulating material 4 and stops at a predetermined position if necessary, and the interlayer insulating material 4 to a predetermined width A cutting cutter 34 for cutting, a guide roll 35 for guiding the cut interlayer insulating material 4 through a predetermined position of the supply table 31, and a feed for applying a set amount of feed to the interlayer insulating material 4 A roll 36, a turning roll 37 that turns the tip of the fed interlayer insulating material 4 downward, a transverse cutter 38 that cuts the interlayer insulating material 4 by a predetermined length, and the fed interlayer insulating material 4 And a spray nozzle 39 for blowing compressed air to the tip.

  When the supply table 31 is formed in a flat plate shape, the passing interlayer insulating material 4 generates static electricity due to friction, the interlayer insulating material 4 is adsorbed to the supplying table 31, and the interlayer insulating material 4 cannot be supplied smoothly. 4, a plurality of V grooves are formed in the supply direction of the interlayer insulating material 4. If comprised in this way, the friction between the upper surface of the supply table 31 and the interlayer insulation material 4 will decrease, generation | occurrence | production of static electricity can be suppressed, and the interlayer insulation material 4 can be supplied smoothly.

  The interlayer insulating material inserting means 40 heat-bonds the tip of the interlayer insulating material 4 to the surface of the coil 1 being wound with the suction member 41 that sucks and guides the tip of the interlayer insulating material 4 to a predetermined position. A heating means 42 composed of a heating roll, a crank 43 that supports the heating means 42 so as to be movable back and forth, and a pressing cylinder 44 that presses the heating means 42 against the surface of the coil 1 being wound with appropriate pressure are provided. Yes.

As shown in FIG. 5, the suction member 41 is formed in a hollow shape, and a plurality of suction holes 41 a are provided in the suction surface at equal intervals in the lateral direction, and a vacuum suction port 41 b for vacuuming is provided.
When the inside of the adsorbing member 41 is in a vacuum state, the adsorbing member 41 adsorbs when the interlayer insulating material 4 comes close to the adsorbing hole 41a, and pulls the adsorbing member 41a downward to apply tension to the interlayer insulating material 4.

The scrap discharging means 50 is for discharging scrap generated when the interlayer insulating material 4 is cut to a predetermined width by the width cutting cutter 34. The scrap discharging duct 51 and the scrap are guided into the scrap discharging duct 51. Compressed air blowing means 52 for blowing compressed air and a scrap container 53 for storing scrap.
The scrap container 53 is disposed at a position where disposal is easy, and the scrap discharge duct 51 is bifurcated in two directions so that one end can be disposed at the upper part of each of the pair of left and right width-cutting cutters. A side opening is provided, each inlet side opening is disposed at the upper part of each of the width-cutting cutters 34 on both the left and right sides, and the other end is disposed as an outlet side opening so as to open into the scrap container 53. The compressed air is blown by the compressed air blowing means 52 from the side opening.

  The dancer roller mechanism 60 is disposed between the interlayer insulating material roll support 14 and the movable carriage 20 on which the interlayer insulating material supplying means 30 and the interlayer insulating material inserting means 40 are mounted, and is supplied to the interlayer insulating material supplying means 30. Applies appropriate tension to the interlayer insulating material 4, and is mounted so as to be slidable up and down inside the sliding frame 61, the turning roll 63 mounted on the upper portion of the sliding frame 61, and the inner side of the sliding frame 61. The swing roll 62 is adjusted to a weight that gives an appropriate tension to the interlayer insulating material 4. The sliding frame 61 is equipped with a height detecting means so that the height position of the swing roll 62 can be detected.

In the winding device for the voltage transformer coil configured as described above, each part automatically operates by inputting the specification value and winding conditions of the coil 1 to be wound into a control device (not shown).
First, the winding specification of the voltage transformer coil 1 is input to the control device, and the coil wire drum 3a of the winding material is input to the coil wire support 13 and the interlayer insulation roll 4a is connected to the interlayer insulation roll support. 14, the winding core 2 is mounted on the coil support 11 and the winding operation is started.
In the coil winding mechanism 10, the wire guide mechanism 16 moves at a pitch corresponding to the wire diameter for tightly winding the coil wire 3 and guides it to the winding position. When the set number of turns of each layer is wound, the coil winding mechanism 10 stops.
Next, the front end portion of the interlayer insulating material 4 cut into a predetermined width is supplied from the interlayer insulating material supply mechanism 30 to the suction portion of the suction member 41. The interlayer insulating material 4 operates according to the procedure shown in FIG. 6, and the interlayer insulating material 4 is wound a predetermined number of turns together with the coil wire 3, and the next layer is tightly wound. This operation is repeated for each layer, and the coil 1 is wound.

Next, the operation when the interlayer insulating material 4 is inserted will be described with reference to FIG.
(1) During winding of the coil 1 portion, as shown in FIG. 6A, the suction member 41 of the interlayer insulating material inserting means 40 is positioned below the turning roll 37 of the interlayer insulating material supplying means 30, and the width The front end of the cut interlayer insulating material 4 is supplied to the position of the suction surface of the suction member 41 and is on standby.
(2) When the tight winding is finished for each layer in the coil winding mechanism 10, the coil winding mechanism 10 stops, and the interlayer insulating material 4 cut into a predetermined width from the interlayer insulating material supply means 30. Is fed to the height shown in FIG. 6B to stop feeding, and the inside of the suction member 41 is evacuated.
(3) When compressed air is instantaneously blown from the blowing nozzle 39 in the state of FIG. 6B, the tip of the interlayer insulating material 4 is adsorbed by the adsorbing member 41 and becomes the state of FIG. 6C.
(4) When the interlayer insulating material 4 is fixed and the adsorption member 41 is moved downward in a state where the tip of the interlayer insulating material 4 is adsorbed by the adsorption member 41, the interlayer insulation material 4 is tensioned by the adsorption member 41. Thus, the wrinkles and looseness of the interlayer insulating material 4 are extended to the state shown in FIG.
(5) In the state shown in FIG. 6D, the movable carriage 20 is moved to the winding coil 1 side, and the portion to which the tension of the interlayer insulating material 4 is applied is brought close to the outer surface of the coil 1 as shown in FIG. As shown in e), the tip of the interlayer insulating material 4 is pressed against the outer surface of the coil 1 for a predetermined time by the heating means 42 and heat bonded.
(6) The adsorption member 41 in the state of FIG. 6 (e) is moved downward to be separated from the tip of the interlayer insulating material 4, and the coil winding mechanism 10 is further rotated in the state of FIG. The wire 3 and the interlayer insulating material 4 are wound at the same time, and the position where the interlayer insulating material 4 is in contact with the surface of the coil 1 just before the predetermined number of turns of the interlayer insulating material 4 and the transverse cutter 38 of the interlayer insulating material supply means 30 The cross-cutting cutter 38 is operated at a rotational angle corresponding to the distance between the two, and the interlayer insulating material 4 is cut, and the insertion of the interlayer insulating material 4 having a predetermined length is completed in the state of FIG.
(7) When the insertion of the interlayer insulating material 4 is completed, the movable carriage 20 is retracted, and the tip of the interlayer insulating material 4 of the next layer is supplied to the state of FIG.
(8) When the insertion of the interlayer insulating material 4 is completed, the next layer of the coil 1 is tightly wound. When the tight winding is completed, the above operations (1) to (7) are repeated to continue the winding.

  As described above, the winding device for the voltage transformer coil is configured as shown in FIG. 2, and the winding specifications of the coil 1 are input to the control device to determine the control conditions, thereby generating a voltage transformer that matches the winding specifications. The device coil 1 can be wound without any labor.

  When the coil wire 3 is disconnected during winding of the coil 1 by the winding device of the voltage transformer coil having the configuration shown in FIG. 2, and the disconnection abnormality is detected by the disconnection detection means 17, the control device issues a disconnection abnormality alarm. Output and pause winding operation. In response to the disconnection abnormality alarm, the operator rewinds to one turn before the end of the inner layer of the wound winding, eliminates the coil wire 3 and the interlayer insulating material 4, and connects the coil wire 3 at the inner layer end position. Then, a predetermined number of turns are sandwiched between the connecting portions with the interlayer insulating material 4 interposed therebetween, and the normal winding operation is resumed.

  Further, when an overlapping phenomenon occurs due to the coil wire rod 3 climbing during winding of the voltage transformer coil, an overlap abnormality alarm is output by the overlap detecting means 18 and the winding operation is temporarily stopped. As in the case of the disconnection, the operator unwinds the coil layer 3 and the interlayer insulating material 4 one turn before the end of the inner layer of the winding layer where the overlapping phenomenon has occurred, and removes the coil wire 3 and the interlayer insulating material 4 at the inner layer end position. The coil wire 3 is connected, the interlayer insulating material 4 is sandwiched between the connection portions, and a predetermined number of turns are wound, and the normal winding operation is resumed.

  As described above, the winding device of the voltage transformer coil is equipped with the disconnection detection means 17 and the overlap detection means 18, and the disconnection abnormality alarm or the coil wire material when the disconnection of the coil wire 3 occurs during the winding of the coil 1 3 When the overlap phenomenon of 3 occurs, the connection work of the coil wire 3 can be performed immediately by the overlap abnormality alarm, and the position of the connection portion is the end portion inside the first layer that does not affect the insulation performance. A winding device that avoids the deterioration can be obtained.

It is a structural diagram which shows the structure of the edge part of a voltage transformation coil, and a position in a connection part. FIG. 6 is a structural diagram of a winding device for a voltage transformer coil according to a second embodiment. It is a block diagram of an overlap detection means. It is explanatory drawing which shows the supply table which supplies the interlayer insulation material of the winding apparatus of FIG. 2, and the both-sides width cut state of an interlayer insulation material. It is explanatory drawing of the supply state of an interlayer insulation material. It is explanatory drawing of the state which inserts an interlayer insulation material in the coil in winding. FIG. 3 is a partial perspective view of a voltage transformer used in an insulated switchgear. FIG. 8 is a structural diagram illustrating a part of the coil portion of FIG. 7 in cross section.

Explanation of symbols

1 coil, 2 core, 3 coil wire, 4 interlayer insulation, 10 coil winding mechanism,
11 Coil support base, 13 Coil wire support base, 14 Interlayer insulating material roll support base,
15 guide wheels, 16 wire guide mechanism, 17 disconnection detection means, 18 disconnection detection means,
20 moving carriage, 21 rail, 22 moving mechanism, 30 interlayer insulating material supply means,
31 Supply table, 32 guide roll, 33 brake roll, 34 wide cutter,
35 guide rolls, 36 feed rolls, 37 turning rolls, 38 cross-cutting cutters,
39 spray nozzle, 40 interlayer insulation material insertion means, 41 adsorption member, 42 heating means,
43 cranks, 44 pressing cylinders, 50 scrap discharge means,
51 scrap discharge duct, 52 compressed air blowing means, 53 scrap container,
60 dancer roller mechanism, 61 sliding frame, 62 swing roll, 63 turning roll.

Claims (4)

The winding device has a multi-layer structure in which a coil wire of an insulation-coated electric wire is closely wound around a core and wound in a multilayer structure, and an insulating layer having an insulating film as an interlayer insulating material is provided between each layer. In the winding operation of the voltage transformer coil, when the coil wire breaks during winding, or when overlap occurs due to running of the coil wire during winding, the winding device is temporarily stopped, and the wire break or overlap occurs. A winding method for a voltage transformer coil, wherein the coil wire is connected at the end position on the inner side of the first layer after unwinding to one turn before the end of the inner portion of the generated portion. A voltage transformer coil having a close-contact multi-layer winding structure in which a coil wire of an insulation-coated electric wire is closely wound around each core and wound in a multilayer structure, and an insulating layer having an insulating film as an interlayer insulating material is provided between each layer. A coil winding mechanism for winding, a disconnection abnormality detecting means for detecting a disconnection abnormality when the coil wire is disconnected during coil winding, and an overlap caused by running of the coil wire during coil winding An overlap abnormality detecting means for detecting as an overlap abnormality;
When the disconnection abnormality detecting means detects a disconnection abnormality of the coil wire, or when the overlap abnormality detection means detects an overlap abnormality of the coil wire, the coil winding mechanism temporarily stops the coil winding operation, During winding, an abnormality occurs in the coil. One end of the winding layer in which the abnormality occurred is stopped by rewinding to one turn before the end of the inner layer of the winding layer and rotating in reverse to remove the coil wire and the interlayer insulating material. After the coil wire is connected at the end position inside the layer, the winding setting value of the winding mechanism is reset to the winding layer to be wound, and the winding operation can be resumed. Transformer winding device. The winding device for a voltage transformer coil according to claim 2, wherein the disconnection abnormality detecting means outputs a disconnection abnormality alarm when the disconnection abnormality is detected. 3. The winding device for a voltage transformer coil according to claim 2, wherein said overlap abnormality detecting means outputs an overlap abnormality alarm when detecting an overlap abnormality.

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