CN211604898U - Experimental gear shifting switch of dry-type transformer - Google Patents

Abstract

The utility model discloses an experimental gear shifting switch of dry-type transformer belongs to the experimental auxiliary device of transformer. The utility model discloses a test gear shifting switch of dry-type transformer, including connect mechanism and change over switch soon, connect the mechanism soon and include insulation board and take a percentage the connecting piece, take a percentage the connecting piece and install on the insulation board on the corresponding connecting piece installation position, take a percentage the connecting piece two by two in proper order constitute the short circuit gear terminal of transformer to be right; the change over switch includes the relay the same with short circuit gear terminal pair quantity, and the two poles of the earth of every relay respectively with the insulation board on the short circuit gear terminal pair electricity that corresponds be connected. The utility model can complete the electrical connection of the quick-connecting mechanism only by simple operation, and the installation operation is simple and rapid; and the automatically controlled switching of cooperation relay can realize the quick stable switching operation of transformer short circuit gear to can pass through communication interconnection with test system, realize the full-automatic test of a key, make dry-type transformer test detection efficiency improve by a wide margin, reduce the cost of labor for the enterprise.

Description

Experimental gear shifting switch of dry-type transformer

Technical Field

The utility model relates to a transformer test device, more specifically say, relate to an experimental gear shifting switch of dry-type transformer.

Background

The dry-type transformer is configured as shown in fig. 1, and the voltage regulation mode of the dry-type transformer is different from the mode of the oil-immersed transformer adopting a no-load tap switch, the voltage regulation of the dry-type transformer is realized by replacing the position of a short connecting piece B3 of a tap B2 through a voltage regulation tap B2 designed on the high-voltage side of the surface of the transformer, and the tap B2 is fixed on the outer surface (called a tap zone) of a high-voltage coil B1 of the dry-type transformer through a copper nut. General dry-type transformer all has 5 gears, and its tap B2 marks with numeral 2, 3, 4, 5, 6, 7 respectively, when copper short circuit piece B3 short circuit different tap B2, reaches the purpose that changes the coil turn to change output voltage. Wherein, 2-3 of the tap B2 is connected to 1 gear, 3-4 is connected to 2 gear, 4-5 is connected to 3 gear, 5-6 is connected to 4 gear, 6-7 is connected to 5 gear.

Before the transformer leaves a factory, resistance and transformation ratio tests of the transformer at different gears are required. During testing, different terminals need to be subjected to short circuit, the most common short circuit method is to use bolts and copper sheets (short connection sheets) for connection, and which gear needs to be tested is used for short-circuit of a corresponding tapping terminal. Another way is to screw a special bolt to each terminal in advance and then short-circuit them with a clip. By adopting the traditional mode, 6 bolts need to be screwed on each coil, and the 6 bolts need to be disassembled after the test is finished. Generally, the test needs two persons, one person tests and one person shifts gears, and the efficiency is very low. The existing automatic test system needs to manually replace the gear after testing the resistance and the transformation ratio of one gear, so as to continue testing the next gear, and the aim of real full-automatic test is not achieved.

Based on the above-mentioned problem that prior art exists, need urgently to design one kind and can conveniently realize the experimental gear shifting switch of dry-type transformer fast to realize that convenient the connection and the quick short circuit of dry-type transformer tapping are taken a percentage and switch, realize the automatic test of transformer.

Disclosure of Invention

1. Technical problem to be solved by the utility model

The utility model aims at providing a shift switch for testing a dry-type transformer, which solves the defects that the operation of short-circuit testing for shifting the gear of the prior dry-type transformer test is complicated, the efficiency is low, and full-automatic testing can not be realized, and the like; and the automatically controlled switching of cooperation relay can realize the quick stable switching operation of transformer short circuit gear to can pass through communication interconnection with test system, realize the full-automatic test of a key, make dry-type transformer test detection efficiency improve by a wide margin, for the enterprise has reduced the cost of labor, and the experimental gear shifting operation of transformer is safe and reliable more.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model relates to a test gear shifting switch of a dry type transformer, which comprises a quick connecting mechanism and a change-over switch, wherein,

the quick connection mechanism comprises an insulating plate and tap connecting pieces which are arranged on the insulating plate and used for being connected and electrified with each group of voltage regulation tap taps of the transformer, connecting piece mounting positions with corresponding numbers and positions are arranged on the insulating plate according to the number and distribution positions of each group of voltage regulation tap taps of the transformer, the tap connecting pieces are arranged on the corresponding connecting piece mounting positions on the insulating plate and form one-to-one correspondence with each group of voltage regulation tap taps of the transformer, and the tap connecting pieces sequentially form a short-circuit gear terminal pair of the transformer in pairs;

the change over switch include with the relay that above-mentioned short circuit gear terminal number of pairs is the same, the relay locate the back of insulation board, and the two poles of the earth of every relay respectively with the insulation board on the short circuit gear terminal that corresponds pair electricity be connected, realize the short circuit of taking a percentage of the corresponding shunting of transformer through the break-make of control each relay.

Furthermore, the change-over switch also comprises a battery and a control panel, the control panel is respectively electrically connected with the battery and the relays, and the control panel controls the on-off of each relay.

Furthermore, the control board is in communication connection with the dry-type transformer test system, and the dry-type transformer test system automatically controls the relays to switch short-circuit gears through the control board.

Furthermore, the tapping connecting piece of the quick connection mechanism comprises a fixing bolt and an elastic contact, the fixing bolt is arranged on at least two connecting piece mounting positions of the insulating plate, and the elastic contact is arranged on the rest connecting piece mounting positions of the insulating plate.

Furthermore, mounting holes are formed in the mounting positions of the connecting pieces of the insulating plate, and the fixing bolts are arranged in the corresponding mounting holes in the insulating plate; the elastic contact comprises a conductive pressing plate and a spring, a connecting column is arranged at the tail part of the conductive pressing plate, the conductive pressing plate is axially and slidably arranged in a corresponding mounting hole of the insulating plate through the connecting column, and the spring is arranged between the conductive pressing plate and the insulating plate.

Furthermore, the connecting column at the tail part of the conductive pressing plate extends out of the mounting hole of the insulating plate, a clamp spring groove is formed in the extending end of the connecting column, and an anti-falling clamp spring for limiting is arranged in the clamp spring groove.

Furthermore, the spring is a disc spring sleeved on the connecting column and positioned between the conductive pressure plate and the insulating plate.

Furthermore, two fixing bolts are arranged and are respectively arranged in the mounting holes at the two ends of the insulating plate; the screw rod portion that fixing bolt passed the mounting hole still be equipped with the anticreep jump ring that is used for preventing fixing bolt from droing.

Furthermore, the quick-connecting mechanism take a percentage the connecting piece include elasticity plug connector, elasticity plug connector all install on the corresponding connecting piece installation position of insulation board, elasticity plug connector include installation department and grafting portion, elasticity plug connector be fixed in on the insulation board through the installation department, grafting portion stretch out the insulation board, and form elasticity tight linking arm that rises through the opening in the grafting portion.

Furthermore, the front end of grafting portion still be equipped with the pressure regulating shunting tap downthehole chamfer of being convenient for the direction to insert the transformer, the one end of installation department be equipped with spacing step, the other end of installation department is equipped with spacing draw-in groove, the installation department install in the mounting hole on the connecting piece installation position of insulation board, spacing draw-in groove in be equipped with the anticreep jump ring, the insulation board press from both sides between spacing step and anticreep jump ring.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following apparent effect:

(1) the utility model discloses a test gear shifting switch of dry-type transformer, it includes connects mechanism and change over switch soon, connect the mechanism soon and include the insulation board and install on the insulation board be used for with the tap connecting piece of the circular telegram of every group pressure regulating tapping connection of transformer, be equipped with quantity and the corresponding connecting piece installation position in position according to quantity and the distribution position of every group pressure regulating tapping of transformer on the insulation board, the tap connecting piece is installed on the corresponding connecting piece installation position on the insulation board, form the one-to-one relation with every group pressure regulating tapping of transformer, the tap connecting piece constitutes the short circuit gear terminal pair of transformer two by two in proper order; the change-over switch comprises relays with the same number as the short-circuit gear terminal pairs, the relays are arranged on the back of the insulating plate, two poles of each relay are respectively and electrically connected with the corresponding short-circuit gear terminal pairs on the insulating plate, and the short circuit of corresponding tapping taps of the transformer is realized by controlling the on-off of each relay; the utility model utilizes the quick-connection mechanism to be connected with the voltage-regulating tapping tap of the dry-type transformer, the fixation and the electrical connection of the quick-connection mechanism can be completed only by simple operation, and the installation operation is simple and rapid; the automatic testing device is matched with the electric control switching of the relay, so that the quick and stable switching operation of the short-circuit gear of the transformer can be realized, the automatic testing device can be communicated and interconnected with a testing system, one-key full-automatic testing is realized, the testing efficiency of the dry-type transformer is greatly improved, the labor cost is reduced for enterprises, and the testing gear-shifting operation of the transformer is safer and more reliable;

(2) the utility model discloses a test gear shifting switch of dry-type transformer, its change over switch still includes battery and control panel, and the control panel is connected with battery and relay electricity respectively, and the power on/off of each relay is controlled by the control panel, is convenient for the automatically controlled control of change over switch; the control board is in communication connection with the dry-type transformer test system, the dry-type transformer test system automatically controls each relay to switch short-circuit gears through the control board, personnel tracking is not needed after wires are connected, the dry-type transformer test system can automatically test and shift gears, the operation is simpler and more intelligent, and full-automatic testing of resistance and transformation ratio tests of the dry-type transformer becomes possible;

(3) the utility model discloses a test gear shifting switch of dry-type transformer, its tapping connecting piece of quick-connect mechanism includes fixing bolt and elastic contact, and fixing bolt locates on at least two connecting piece installation positions of insulation board, is equipped with elastic contact on the other connecting piece installation positions of insulation board, utilizes a small amount of fixing bolt can realize that quick-connect mechanism and every group of voltage regulation tapping of transformer are taken a percentage the corresponding terminal of stable electric connection, and the transformer connects easy operation, and connects stably and reliably;

(4) the utility model discloses a test gear shifting switch of dry-type transformer, the connecting piece installation position department of its insulation board is equipped with the mounting hole, the elastic contact includes electrically conductive clamp plate and spring, the afterbody of electrically conductive clamp plate is equipped with the spliced pole, electrically conductive clamp plate installs in the corresponding mounting hole of insulation board through the spliced pole axial slip, the spring is located between electrically conductive clamp plate and the insulation board, make electrically conductive clamp plate form the elastic contact structure, can effectively compensate the bad contact phenomenon that transformer tapping terminal unevenness caused, make the connection of transformer tapping more reliable and stable; the connecting column at the tail part of the conductive pressing plate extends out of the mounting hole of the insulating plate, the extending end of the connecting column is provided with a clamp spring groove, and an anti-falling clamp spring for limiting is arranged in the clamp spring groove;

(5) the utility model discloses a test gear shifting switch of dry-type transformer, its fixing bolt is equipped with two, and two fixing bolts locate the mounting hole that is located the insulation board both ends respectively, only need connect two fixing bolts can once realize the quick connection of a set of shunting taps, connect the operation simple more swiftly; the screw part of the fixing bolt penetrating through the mounting hole is provided with an anti-falling clamp spring for preventing the fixing bolt from falling off, so that the fixing bolt can be stably combined with the insulating plate, and the fixing bolt is prevented from being separated and lost;

(6) the utility model discloses a test gear shifting switch of dry-type transformer, its take a percentage connecting piece of mechanism that connects soon includes the elasticity plug connector, and the elasticity plug connector is all installed on the corresponding connecting piece installation position of insulation board, and the elasticity plug connector includes installation department and grafting portion, and the elasticity plug connector is fixed in on the insulation board through the installation department, and the grafting portion stretches out the insulation board, and forms elasticity tight linking arm that rises through the opening on the grafting portion; the elastic plug connector is adopted to realize connection with a voltage regulating tapping tap of the transformer, bolt connection is not needed, connection is simpler and more convenient, and operation is flexible and quick.

Drawings

Fig. 1 is a schematic structural diagram of a conventional dry-type transformer;

fig. 2 is a schematic structural diagram of a dry-type transformer test shift switch according to embodiment 1 of the present invention;

FIG. 3 is a right side view of the dry transformer test shift switch of FIG. 2;

fig. 4 is a schematic structural diagram of a quick-connection mechanism in a test gear shifting switch of a dry-type transformer according to embodiment 1 of the present invention;

fig. 5 is a schematic view of an installation state of a relay on an insulating plate in a dry-type transformer test shift switch according to embodiment 1 of the present invention;

fig. 6 is a schematic structural diagram of a dry-type transformer test shift switch according to embodiment 2 of the present invention;

FIG. 7 is a left side view of the dry transformer test shift switch of FIG. 6;

fig. 8 is a schematic structural view of a quick-connection mechanism in a test gear shifting switch of a dry-type transformer according to embodiment 2 of the present invention;

fig. 9 is a schematic structural view of an elastic plug connector in a dry-type transformer test shift switch according to embodiment 2 of the present invention;

fig. 10 is the utility model discloses an electric connection schematic diagram of relay and the short circuit gear terminal pair on the insulation board in the experimental gear shifting switch of dry-type transformer.

The reference numerals in the schematic drawings illustrate:

b1, high-voltage coil; b2, tap; b3, short tab.

1. An insulating plate; 1-1, mounting holes; 2. fixing the bolt; 3. a conductive platen; 3-1, a clamp spring groove; 4. a spring; 5. a diverter switch assembly; 5-1, a relay switch; 6. a wire; 7. an anti-drop snap spring; 8. an elastic plug connector; 8-1, mounting part; 8-2, a plug part; 8-3, opening; 8-4, chamfering; 8-5, a limiting step; 8-6, a limiting clamping groove; 8-7 and a lead connecting hole.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural diagram of a conventional dry-type transformer, in which tap taps B2 are provided on an outer surface of a high-voltage coil B1, tap taps B2 have different numbers according to different transformer parameters, and tap taps B2 are arranged and distributed according to a certain rule. Before the transformer leaves the factory, in order to guarantee product quality, resistance and transformation ratio tests when different gears need to be carried out on the transformer, the most common method for the traditional gear short circuit is to connect the corresponding gear by using a short connecting piece B3, the short connecting piece B3 on one gear needs to be connected by a bolt in each test, one person is generally needed for testing, one person is needed for gear shifting, and the test efficiency is very low. For the test and detection before delivery of the dry-type transformer, no special test gear shifting device exists at present.

Therefore, the utility model provides a can make things convenient for device that realizes experimental gear shifting of dry-type transformer fast, combine fig. 2 and fig. 6 to show, this experimental gear shifting switch of dry-type transformer, it includes quick-connect mechanism and change over switch 5 two parts, quick-connect mechanism includes insulation board 1 and installs on insulation board 1 and be used for being connected the electrified tapping connecting piece with every group pressure regulating tapping B2 of transformer, insulation board 1 is last to be equipped with quantity and the corresponding connecting piece mount position in position according to the quantity and the distribution position of every group pressure regulating tapping B2 of transformer, the tapping connecting piece is installed on insulation board 1 on the corresponding connecting piece mount position, form one-to-one with every group pressure regulating tapping B2 of transformer, the tapping connecting piece constitutes the short circuit gear terminal pair of transformer two liang in proper order; the change-over switch 5 comprises relays 5-1 with the same number of pairs of short-circuit gear terminals, the relays 5-1 are arranged on the back of the insulating plate 1, two poles of each relay 5-1 are electrically connected with the corresponding pair of short-circuit gear terminals on the insulating plate 1 respectively, and the short circuit of the corresponding tapping tap B2 of the transformer is realized by controlling the on-off of each relay 5-1.

Therefore, the fixation and the electrical connection of the quick connection mechanism can be completed only by simple operation, and the installation operation is simple and quick; and the rapid and stable switching operation of the short-circuit gear of the transformer can be realized by matching with the electric control switching of the relay 5-1, so that the test detection efficiency of the dry-type transformer is greatly improved, the labor cost of enterprises is reduced, and the test gear shifting operation of the transformer is safer and more reliable. The change-over switch 5 also comprises a battery and a control panel, the control panel is respectively electrically connected with the battery and the relays 5-1, and the control panel controls the on-off of each relay 5-1, so that the electric control of the change-over switch 5 is facilitated; and the control board is in communication connection with the dry-type transformer test system, the dry-type transformer test system automatically controls each relay 5-1 to switch short-circuit gears through the control board, personnel tracking is not needed after the wires are connected, the dry-type transformer test system can automatically test gear shifting, and the operation is simpler and more intelligent.

The present invention will be further described with reference to the following embodiments by taking the dry-type transformer shown in fig. 1 as an example.

[ example 1]

As shown in fig. 2 to 5 and 10, the gear shifting switch for testing a dry-type transformer of this embodiment includes a quick-connection mechanism and a change-over switch 5, wherein the quick-connection mechanism includes an insulating plate 1 and tap connectors mounted on the insulating plate 1 for connecting to and energizing each group of voltage-regulating tap B2 of the transformer, connector mounting positions corresponding in number and position are provided on the insulating plate 1 according to the number and distribution position of each group of voltage-regulating tap B2 of the transformer, that is, as shown in fig. 3, six connector mounting positions corresponding to tap B2 of the transformer are provided on the insulating plate 1 and are respectively marked with numbers 2, 3, 4, 5, 6, and 7, so as to form a five-gear adjusting structure, where the identifier 2 and the identifier 3 of the connector mounting positions are connected to 1 gear, the identifier 3 and the identifier 4 are connected to 2 gear, the identifier 4 and the identifier 5 and the identifier 6 are connected to 4 gear, the mark 6 and the mark 7 are connected into 5 gears, and in the process of testing gear shifting of the transformer, the 1-5 gears need to be respectively short-circuited to carry out resistance and transformation ratio tests; in above-mentioned each connecting piece installation position, the connecting piece of taking a percentage is installed on the connecting piece installation position that corresponds on insulation board 1, it forms one-to-one corresponding relation with every group pressure regulating shunting tap B2 of transformer, the connecting piece of taking a percentage is two liang in proper order to constitute the short circuit gear terminal pair of transformer, 2# connecting piece installation position and 3# connecting piece installation position form first short circuit gear terminal pair promptly, 3# connecting piece installation position and 4# connecting piece installation position form second short circuit gear terminal pair, 4# connecting piece installation position and 5# connecting piece installation position form third short circuit gear terminal pair, 5# connecting piece installation position and 6# connecting piece installation position form fourth short circuit gear terminal pair, 6# connecting piece installation position and 7# connecting piece installation position form fifth short circuit gear terminal pair. Specifically in this embodiment, the connecting piece of taking a percentage of mechanism soon includes fixing bolt 2 and elastic contact, and on two at least connecting piece installation positions of insulation board 1 were located to fixing bolt 2, be equipped with elastic contact on the remaining connecting piece installation positions of insulation board 1, utilize a small amount of fixing bolt 2 can realize that the mechanism of taking a percentage of the every group pressure regulating of transformer is taken a percentage B2's that corresponds terminal stable electric connection soon, and the transformer is connected easy operation convenience, and connects reliably steadily. Further, fixing bolt 2 is equipped with two, and two fixing bolt 2 are located the both ends of insulation board 1 respectively, and fixing bolt 2 locates 2# connecting piece installation position and 7# connecting piece installation position respectively promptly, can realize insulation board 1 stable connection on the transformer through two fixing bolt 2, and utilize fixing bolt 2 and take a tap each shunting of connecting piece and transformer to take a tap B2 stable electric connection, connect the operation simple swift more.

The change-over switch 5 comprises relays 5-1 with the same number of pairs of short-circuit gear terminals, the relays 5-1 are arranged on the back of the insulating plate 1, two poles of each relay 5-1 are electrically connected with the corresponding pair of short-circuit gear terminals on the insulating plate 1 respectively, and the short circuit of the corresponding tapping tap B2 of the transformer is realized by controlling the on-off of each relay 5-1. Each relay 5-1 corresponds to one short-circuit gear terminal pair, and the short circuit of the short-circuit gear terminal pair is realized by turning on one relay 5-1. As shown in FIG. 10, there are five sets of relays 5-1 corresponding to five short-circuit gears of the transformer, the five sets of relays 5-1 are arranged on the insulating board 1 side by side, the electrode posts at two ends of the first set of relays 5-1 are respectively connected with the tap connectors of the 2# connector mounting position and the 3# connector mounting position on the insulating board, the electrode posts at two ends of the second set of relays 5-1 are respectively connected with the tap connectors of the 3# connector mounting position and the 4# connector mounting position on the insulating board, the electrode posts at two ends of the third set of relays 5-1 are respectively connected with the tap connectors of the 4# connector mounting position and the 5# connector mounting position on the insulating board, the electrode posts at two ends of the fourth set of relays 5-1 are respectively connected with the tap connectors of the 5# connector mounting position and the 6# connector mounting position on the insulating board, and the electrode posts at two ends of the fifth set of relays 5- The short circuit control of the tap B2 of each gear of the transformer can be realized by controlling the on-off of each relay 5-1 through the fixing bolts 2 of the installation positions of the tap connecting piece and the 7# connecting piece. In this embodiment, the switch 5 further includes a battery and a control board, the control board is electrically connected to the battery and the relay 5-1, the battery is used for supplying power to the control board and the relay 5-1, the control board controls the relay 5-1 to be powered on and off, and the relay 5-1 can be controlled to act by using a small current of the battery to realize the short-circuit operation of the transformer. The control panel is integrated with a circuit module, and the circuit module is used for controlling the action of the switch position corresponding to the relay 5-1. The specific circuit structure and principle of the circuit module are the same as those of the control circuit of the existing relay switch, and the detailed description is omitted here. By adopting the design, the control panel can be in communication connection with the dry-type transformer test system, the communication between the control panel and the dry-type transformer test system can be realized in a wired or wireless mode, the dry-type transformer test system switches short-circuit gears through the control panel automatic control relay 5-1, personnel tracking is not needed after the wires are connected, the dry-type transformer test system can automatically test and shift gears, one-key full-automatic test is realized, the test detection efficiency of the dry-type transformer is greatly improved, and the operation is simpler and more intelligent.

Referring to fig. 4, in the present embodiment, each connector mounting position on the insulating plate 1 is provided with a mounting hole 1-1, and the fixing bolt 2 is disposed in the corresponding mounting hole 1-1 on the insulating plate 1. Elastic contact includes electrically conductive clamp plate 3 and spring 4, the afterbody of electrically conductive clamp plate 3 is equipped with the spliced pole, electrically conductive clamp plate 3 installs in the corresponding mounting hole 1-1 of insulation board 1 through the spliced pole endwise slip ground, spring 4 locates between electrically conductive clamp plate 3 and the insulation board 1, make electrically conductive clamp plate 3 form the elastic contact structure, after experimental gear shifting switch installs on the transformer, utilize spring 4's elasticity can make electrically conductive clamp plate 3 more steadily ground pressure on the tapping B2 of tapping of transformer, can effectively compensate the poor contact phenomenon that transformer tapping tap terminal unevenness caused, make the connection that transformer tapping was taken a percentage more reliable and more stable. In order to facilitate the installation of the conductive pressing plate 3, the connecting column at the tail part of the conductive pressing plate 3 preferably extends out of the installation hole 1-1 of the insulating plate 1, the extending end of the connecting column is provided with a clamp spring groove 3-1, an anti-falling clamp spring 7 for limiting is arranged in the clamp spring groove 3-1, the conductive pressing plate 3 is stably connected to the insulating plate 1 by the anti-falling clamp spring 7, and the tapping connecting piece is more convenient to assemble on the insulating plate 1 and is convenient for manufacturing a test gear shifting switch. The spring 4 is preferably a disc spring sleeved on the connecting column and located between the conductive pressing plate 3 and the insulating plate 1, and the disc spring has the advantages of short stroke, large bearing load, convenience in assembly and the like, so that the telescopic action of the conductive pressing plate 3 is more stable.

As shown in fig. 4, in this embodiment, two fixing bolts 2 are provided, and the two fixing bolts 2 are respectively disposed in the mounting holes 1-1 located at two ends of the insulating plate 1, the screw portion of the fixing bolt 2 passing through the mounting hole 1-1 is provided with an anti-falling clamp spring 7 for preventing the fixing bolt 2 from falling off, the anti-falling clamp spring 7 can limit the fixing bolt 2 in the mounting hole 1-1, so that the fixing bolt 2 can be stably combined with the insulating plate 1, and the fixing bolt 2 is prevented from being disengaged and lost. And the head of the cap of the fixing bolt 2 and the tail of the connecting column of the conductive pressing plate 3 are connected with the switch position electrode column of the relay switch 5-1 through a lead 6, the electric connection is simple and convenient, and the gear short circuit is stable. Specifically, the head of the fixing bolt 2 can be connected with the lead 6 through an electrode connecting sheet, the tail of the connecting column of the conductive pressing plate 3 can be connected with the lead 6 through pressing riveting or tin soldering, and the connection is simple and convenient.

[ example 2]

As shown in fig. 6 to 10, the basic structure and the operation principle of the shift switch for testing the dry-type transformer of the present embodiment are the same as those of embodiment 1, except that: in the embodiment, another quick-connection mechanism is provided, and the plug connection is performed by using a screw hole on a tapping tap B2 of the transformer. Specifically, the tapping connecting piece of the quick connection mechanism comprises an elastic plug connector 8, the elastic plug connector 8 is installed on a corresponding connecting piece installation position of the insulating plate 1, the elastic plug connector 8 comprises an installation portion 8-1 and an insertion portion 8-2, the elastic plug connector 8 is fixed on the insulating plate 1 through the installation portion 8-1, the insertion portion 8-2 extends out of the insulating plate 1, and the insertion portion 8-2 is provided with an elastic tensioning connecting arm through an opening 8-3. In this embodiment, the insertion part 8-2 is a hollow structure, 4 openings 8-3 of the insertion part 8-2 are uniformly arranged along the circumferential direction of the insertion part 8-2, and the opening 8-3 is cross-shaped when viewed from the axial direction of the elastic insertion part 8. Because the position of each elastic plug connector 8 on the insulating plate 1 corresponds to the position of a tapping tap B2 of the transformer, and the original tapping tap B2 of the transformer is provided with a threaded hole, the elastic plug connectors 8 can be inserted into the threaded holes of the tapping taps B2 to realize quick connection, and the insertion parts 8-2 of the elastic plug connectors 8 can contract inwards to generate elastic tensioning action when being inserted into the tapping taps B2, so that the firm connection between the elastic plug connectors 8 and the tapping taps B2 of the transformer is ensured. The elastic plug connector 8 is adopted to realize the connection with the transformer voltage regulating tapping tap B2, the bolt connection is not needed, the connection is simpler and more convenient, and the operation is flexible and quick.

As shown in fig. 9, in order to facilitate the installation and the insertion of the elastic plug connector 8, a chamfer 8-4 is further provided at the front end of the insertion part 8-2 for guiding the insertion of the pressure regulating tap B2 into the center hole of the transformer, so that the outer diameter of the front end face of the insertion part 8-2 is smaller than the inner diameter of the center hole of the tap B2, and the outer diameter of the rear section of the insertion part 8-2 is larger than the center hole of the tap B2, thereby playing a good guiding role when the insertion part 8-2 is inserted into the center hole of the tap B2, facilitating the insertion of the insertion part 8-2, forcing the tension connecting arm of the insertion part 8-2 to deform inward to generate tension force, and ensuring stable connection. One end of the mounting part 8-1 is provided with a limiting step 8-5, the other end of the mounting part 8-1 is provided with a limiting clamping groove 8-6, the mounting part 8-1 is mounted in a mounting hole 1-1 on a connecting piece mounting position of the insulating plate 1, an anti-falling clamping spring 7 is arranged in the limiting clamping groove 8-6, and the insulating plate 1 is clamped between the limiting step 8-5 and the anti-falling clamping spring 7. In the embodiment, the limiting step 8-5 is arranged at one side close to the inserting part 8-2, the outer diameter of the inserting part 8-2 is larger than the inner diameter of the mounting hole 1-1 of the insulating plate 1, the elastic inserting piece 8 is inserted into the mounting hole 1-1 of the insulating plate 1 from the tail end of the mounting part 8-1, and the tail end extends out of the limiting clamping groove 8-6 of the insulating plate 1 and is fixed through the anti-falling clamping spring 7. In addition, the tail part of the mounting part 8-1 is provided with a wire connecting hole 8-7 for connecting a wire, so that the elastic plug connector 8 is electrically connected with the relay 5-1 conveniently.

In the test shift switch of the dry-type transformer of the embodiments 1 and 2 of the present invention, when in use, the test shift switch of the transformer is electrically connected to the corresponding coil tap B2 of the transformer by using the quick connection mechanism, so that the tap connectors on the insulating board 1 are respectively and stably connected to the corresponding tap taps B2; then, controlling the corresponding relay 5-1 to be switched on or off, and carrying out resistance and transformation ratio tests when each gear is in short circuit; after one gear test is finished, switching to another gear by using the relay 5-1, changing the number of turns of a coil of the transformer, and performing resistance and transformation ratio tests again; and repeating the operation to complete the resistance and transformation ratio test of the whole dry-type transformer. The whole test process can be realized by simple operation, the fixation and the electrical connection of the quick connection mechanism can be realized, the short circuit switching before different gears of the transformer coil can be realized by switching the relay 5-1, and the relay 5-1 can be interconnected with a test system through communication, so that one-key full-automatic test is realized.

The utility model discloses a test gear shifting switch of dry-type transformer, utilize the fast mechanism of connecing to be connected with the voltage regulation shunting tap of dry-type transformer, only need simple operation can accomplish fast mechanism's fixed and electric connection, the installation easy operation is swift; and the automatically controlled switching of cooperation relay can realize the quick stable switching operation of transformer short circuit gear to can pass through communication interconnection with test system, realize the full-automatic test of a key, make dry-type transformer test detection efficiency improve by a wide margin, for the enterprise has reduced the cost of labor, and the experimental gear shifting operation of transformer is safe and reliable more.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The present invention and its embodiments have been described above schematically, and the description is not intended to be limiting, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, the technical scheme and the embodiments similar to the technical scheme are not creatively designed without departing from the spirit of the present invention, and the present invention shall fall into the protection scope of the present invention.

Claims (10)

1. The utility model provides a test gear shifting switch of dry-type transformer which characterized in that: comprises a quick-connection mechanism and a change-over switch (5), wherein,

the quick connection mechanism comprises an insulating plate (1) and tap connecting pieces which are arranged on the insulating plate (1) and used for being connected and electrified with each group of voltage regulation tap taps (B2) of the transformer, connecting piece mounting positions with corresponding numbers and positions are arranged on the insulating plate (1) according to the number and distribution positions of each group of voltage regulation tap taps (B2) of the transformer, the tap connecting pieces are arranged on the corresponding connecting piece mounting positions on the insulating plate (1) and form a one-to-one correspondence relationship with each group of voltage regulation tap taps (B2) of the transformer, and the tap connecting pieces sequentially form short-circuit gear terminal pairs of the transformer in pairs;

the change-over switch (5) comprises relays (5-1) with the same number as the short-circuit gear terminal pairs, the relays (5-1) are arranged on the back of the insulating plate (1), two poles of each relay (5-1) are respectively electrically connected with the corresponding short-circuit gear terminal pairs on the insulating plate (1), and the corresponding tapping taps (B2) of the transformer are short-circuited by controlling the on-off of each relay (5-1).

2. A dry-type transformer test shift switch as claimed in claim 1, wherein: the change-over switch (5) further comprises a battery and a control board, the control board is respectively electrically connected with the battery and the relays (5-1), and the control board controls the on-off of each relay (5-1).

3. A dry-type transformer test shift switch as claimed in claim 2, wherein: the control board is in communication connection with the dry-type transformer test system, and the dry-type transformer test system automatically controls the relays (5-1) to switch short-circuit gears through the control board.

4. A dry-type transformer test shift switch as claimed in claim 1, 2 or 3, wherein: the quick-connection mechanism comprises a tapping connecting piece and a quick-connection mechanism body, wherein the tapping connecting piece comprises a fixing bolt (2) and an elastic contact, the fixing bolt (2) is arranged on at least two connecting piece installation positions of an insulating plate (1), and the elastic contact is arranged on the rest connecting piece installation positions of the insulating plate (1).

5. A dry-type transformer test gear shifting switch according to claim 4, characterized in that: mounting holes (1-1) are formed in the mounting positions of the connecting pieces of the insulating plate (1), and the fixing bolts (2) are arranged in the corresponding mounting holes (1-1) on the insulating plate (1); the elastic contact comprises a conductive pressing plate (3) and a spring (4), a connecting column is arranged at the tail part of the conductive pressing plate (3), the conductive pressing plate (3) is axially and slidably arranged in a corresponding mounting hole (1-1) of the insulating plate (1) through the connecting column, and the spring (4) is arranged between the conductive pressing plate (3) and the insulating plate (1).

6. A dry-type transformer test gear shifting switch according to claim 5, characterized in that: the connecting column at the tail part of the conductive pressing plate (3) extends out of the mounting hole (1-1) of the insulating plate (1), a clamp spring groove (3-1) is formed in the extending end of the connecting column, and an anti-falling clamp spring (7) for limiting is arranged in the clamp spring groove (3-1).

7. A dry-type transformer test shift switch as claimed in claim 6, wherein: the spring (4) is a disc spring which is sleeved on the connecting column and is positioned between the conductive pressure plate (3) and the insulating plate (1).

8. A dry-type transformer test gear shifting switch according to claim 5, characterized in that: the number of the fixing bolts (2) is two, and the two fixing bolts (2) are respectively arranged in the mounting holes (1-1) at the two ends of the insulating plate (1); the screw part of the fixing bolt (2) penetrating through the mounting hole (1-1) is also provided with an anti-falling clamp spring (7) for preventing the fixing bolt (2) from falling off.

9. A dry-type transformer test shift switch as claimed in claim 1, 2 or 3, wherein: the tapping connecting piece of the quick connection mechanism comprises an elastic plug connector (8), the elastic plug connector (8) is installed on a corresponding connecting piece installation position of an insulating board (1), the elastic plug connector (8) comprises an installation part (8-1) and an insertion part (8-2), the elastic plug connector (8) is fixed on the insulating board (1) through the installation part (8-1), the insertion part (8-2) extends out of the insulating board (1), and the insertion part (8-2) is provided with an elastic tensioning connecting arm through an opening (8-3).

10. A dry-type transformer test shift switch as claimed in claim 9, wherein: the front end of grafting portion (8-2) still be equipped with the pressure regulating of being convenient for the direction to insert the transformer and divide tap chamfer (8-4) in (B2) the centre bore, the one end of installation department (8-1) be equipped with spacing step (8-5), the other end of installation department (8-1) is equipped with spacing draw-in groove (8-6), installation department (8-1) install in mounting hole (1-1) on the connecting piece installation position of insulation board (1), spacing draw-in groove (8-6) in be equipped with anticreep jump ring (7), insulation board (1) press from both sides between spacing step (8-5) and anticreep jump ring (7).

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