CN115346781A - Transformer on-load voltage regulation switching device - Google Patents
Transformer on-load voltage regulation switching device Download PDFInfo
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- CN115346781A CN115346781A CN202211059697.0A CN202211059697A CN115346781A CN 115346781 A CN115346781 A CN 115346781A CN 202211059697 A CN202211059697 A CN 202211059697A CN 115346781 A CN115346781 A CN 115346781A
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- 238000007789 sealing Methods 0.000 claims description 18
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 229920000459 Nitrile rubber Polymers 0.000 claims description 13
- 238000012546 transfer Methods 0.000 claims description 10
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/56—Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
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- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention relates to the field of voltage regulating switches, in particular to a transformer on-load voltage regulating switch device, which comprises a bottom shell top shell, a vacuum change-over switch transmission mechanism and a voltage regulating selection switch transmission mechanism, wherein the vacuum change-over switch transmission mechanism and the voltage regulating selection switch transmission mechanism are driven by a driving mechanism; a driving mechanism is arranged at one end of the bottom shell, a plurality of groups of vacuum switching switches are arranged at the upper right part of the bottom shell, a plurality of groups of static contacts are detachably arranged at the lower right part of the bottom shell, a voltage regulating selection switch transmission mechanism is arranged above the plurality of groups of static contacts, a moving contact module is arranged between the static contacts in each group, and the moving contact module is driven by the voltage regulating selection switch transmission mechanism and is arranged between the static contacts in a sliding manner to realize voltage regulation; the on-load voltage regulation switch device adopts a clamping type and nested type installation mode, replaces the traditional bolt installation and rivet installation, not only effectively avoids the risks of loosening of the installation bolt, falling of the rivet and the like, reduces the difficulty of the assembly process of the voltage regulation switch, reduces the overall size of the on-load voltage regulation transformer and reduces the cost.
Description
Technical Field
The invention relates to the field of voltage regulating switches, in particular to a transformer on-load voltage regulating switch device.
Background
With the rapid development of national socioeconomic, the annual power load is increased rapidly at about 10%, and with the improvement of the complexity of power generation and supply conditions, especially the large quantity of intermittent energy such as photovoltaic energy, wind power energy and the like is connected to the grid in the future, the voltage fluctuation of the power grid is further increased. Along with the improvement of the requirements of people on the power supply quality, higher requirements are also put forward for relevant functional departments.
Distribution transformers in operation in the current market are generally non-excitation manual voltage regulating transformers, and the conditions of high outlet voltage, low tail end voltage and high voltage in light load of a transformer area exist. The access of distributed new energy source grid-connection such as wind power and photovoltaic and high-power pulsating load such as electric vehicle charging further aggravate voltage fluctuation and influence the quality of power supply voltage. The low voltage can affect the output of the electric equipment and even can not be used normally, the current of the motor is increased to cause overheating and burning, the line loss is increased, and the power supply capacity of the line is reduced; the service life of electric equipment can be greatly shortened by high voltage, the magnetic saturation caused by the magnetic flux density of the transformer core is increased, the loss and the noise of the transformer are increased, and the operation safety of the transformer is influenced.
In order to improve the power supply quality, the on-load voltage regulation technology of the transformer is widely applied at present. The on-load voltage regulation technology of the distribution transformer not only improves the power supply quality and prolongs the service life of an electric appliance, but also has excellent energy-saving effect. The on-load voltage regulating switch on the current market mostly has the defects that internal accessories are installed by bolts and rivets, the failure is easy to occur, the assembly process is complex, the switch size is large, the assembly process of the whole transformer is also complex, the cost is high and the like. Therefore, how to overcome the above technical problems and disadvantages is a problem to be solved.
Disclosure of Invention
The invention aims to overcome the defects described in the background technology, and thus, the on-load tap changer device of the transformer is realized, the on-load tap changer device adopts a clamping type and a nesting type installation mode, the traditional bolt installation and rivet installation are replaced, the risks of loosening of the installation bolt, falling of the rivet and the like are effectively avoided, the assembly process difficulty of the tap changer is reduced, the volume of the on-load tap changer is reduced due to the elimination of the bolt and the rivet, and the overall volume of the on-load tap changer is reduced, and the cost is reduced.
In order to achieve the purpose, the technical scheme of the invention is as follows: a transformer on-load voltage regulation switch device comprises a bottom shell and a top shell which are integrally formed and buckled with each other; one end of the inside of the bottom shell is detachably provided with a driving mechanism, the driving mechanism is embedded in a driving clamping groove which is integrally formed on the bottom shell and the top shell, and the driving mechanism consists of four groups of permanent magnetic mechanisms; a plurality of groups of vacuum change-over switches are detachably arranged at the right upper part of the bottom shell, and the vacuum change-over switches are clamped and arranged in a change-over switch clamping groove which is integrally formed on the bottom shell; the bottom shell right side lower part can be dismantled and be provided with the multiunit static contact, the static contact joint sets up on the bottom shell on integrated into one piece's contact fixed station, just static contact and switch terminal integrated into one piece, the switch terminal is worn out the bottom shell downwards and is used for external cable.
The switch device also comprises a vacuum change-over switch transmission mechanism and a pressure regulating selection switch transmission mechanism which are driven by the driving mechanism, wherein the vacuum change-over switch transmission mechanism is arranged among the plurality of vacuum change-over switches and is detachably connected with the vacuum change-over switches, and the driving mechanism drives the corresponding vacuum change-over switches to realize the separation and the combination; the pressure regulating selection switch transmission mechanism is arranged above the multiple groups of static contacts, a movable contact module arranged on the pressure regulating selection switch transmission mechanism is arranged between the static contacts in each group, and the movable contact module is driven by the pressure regulating selection switch transmission mechanism and is arranged between the static contacts in a sliding mode to realize pressure regulation.
In addition, the switch device also comprises a plurality of transition resistors with the same number as the vacuum change-over switch groups, the transition resistors are clamped on a resistor boss integrally formed on the bottom shell, and the transition resistors are positioned above the voltage regulating selection switch transmission mechanism.
In the on-load tap changer device for the transformer, the vacuum change-over switch transmission mechanism comprises a switch transmission plate and driving shifting forks, the driving shifting forks are alternately distributed on opposite side walls of the switch transmission plate, the vacuum change-over switches in each group are oppositely arranged, and the driving shifting forks are arranged on the inner sides of end plates arranged at the end parts of action shafts of the vacuum change-over switches in a splicing matching manner.
In the transformer on-load voltage regulation switch device, one end of the switch transmission plate, which is close to the driving mechanism, is provided with a driving clamping module, the driving clamping module comprises a clamping block and a clamping elbow, the end part of the clamping block is Y-shaped, matching grooves are formed in two side walls of the clamping block, the clamping elbow is C-shaped and is fixedly arranged at the output shaft end of the driving mechanism, and a clamping jaw at the tail end of the clamping elbow is inserted into the matching groove of the clamping block to realize clamping fixation; the end surface of the clamping block is provided with a shaft end limiting groove, and the output shaft end of the driving mechanism is clamped in the shaft end limiting groove of the clamping block; a plurality of limiting baffles are distributed and arranged on the switch transmission plate along the length direction, and the limiting baffles and the shifting switch clamping groove which is integrally formed on the bottom shell generate interference to realize sliding limitation.
In above-mentioned transformer on-load tap changer device, pressure regulating selection switch drive mechanism includes the pressure regulating driving plate, it sets up a plurality of limit baffle to distribute along length direction on the pressure regulating driving plate, limit baffle produces with drain pan and top shell on integrated into one piece's the contact fixed station and interferes the realization slip spacing.
In the on-load voltage regulation switch device of the transformer, the moving contact module comprises a contact boss integrally arranged on the lower bottom surface of the voltage regulation transmission plate, springs are arranged on two sides of the contact boss, a support ring is sleeved on the periphery of the contact boss and the springs, copper contacts are fixedly arranged on two side walls of the support ring, and the voltage regulation transmission plate drives the support ring and the copper contacts to slide and switch between the fixed contacts of each group by means of the springs.
In above-mentioned transformer on-load tap changing switching device, the voltage regulation driving plate is close to actuating mechanism one end and is provided with drive joint module, drive joint module includes joint piece and joint elbow, joint piece tip becomes the Y type, and sets up the cooperation groove on the both sides wall, the joint elbow is the C type, and fixed the output axle head that sets up in actuating mechanism, the terminal jack catch grafting of joint elbow realizes that the joint is fixed in the cooperation inslot of joint piece.
In the on-load voltage regulation switch device of the transformer, the secondary wire outgoing mechanism comprises an installation transition plate, an installation wire sleeve, a sealing washer pressing ring, a specially-made pressing nut, a nitrile rubber terminal, a terminal pressing pad and a secondary wire outgoing terminal, the installation transition plate can be detachably and fixedly arranged on the top surface of one end of a top shell, the installation wire sleeve is a cylindrical barrel with a step inner hole and is welded and arranged at the top of the installation transition plate, the installation wire sleeve penetrates out of a through hole of a top cover of the transformer and is sleeved with the sealing washer, the sealing washer pressing ring and the specially-made pressing nut are sequentially arranged outside the installation wire sleeve above the sealing washer, the nitrile rubber terminal is arranged in the step inner hole of the installation wire sleeve, the terminal pressing pad is arranged above the nitrile rubber terminal and is pressed by the specially-made pressing nut, and the secondary wire outgoing terminal is led out of the nitrile rubber terminal and penetrates through the specially-made pressing nut for secondary wiring.
In above-mentioned transformer on-load voltage regulation switching device, purpose-made gland nut includes the nut body, nut body bottom center department sets up and is greater than the central screw hole of nut and is less than the blind hole that compresses tightly of the inscription circle diameter in the nut cross section, just compress tightly the blind hole and set up with nut body central screw hole is coaxial, the diameter that compresses tightly the blind hole is greater than the diameter of terminal pressure pad to make the terminal pressure pad be located and compress tightly the blind hole, realize its assembly that compresses tightly.
The transformer on-load tap changer has the beneficial effects that:
1. according to the transformer on-load voltage regulation switch device, the voltage regulation driving plate and the switch driving plate are respectively connected with the corresponding permanent magnet driving mechanisms in a clamping manner, and the transition resistor is also connected with the integrally formed resistor boss on the bottom shell in a clamping manner; the driving mechanism is installed in the spliced driving clamping grooves formed in the bottom shell and the top shell in an integrated mode in an embedded installation mode, the moving contact of the voltage regulating switch is installed on the switch transmission plate in an embedded mode, and the fixed contact and the on-load voltage regulating switch outgoing line terminal are installed on the bottom shell in an integrated mode in an embedded mode. The traditional bolt installation and rivet installation are replaced by the clamping connection and nested installation mode, the risks of loosening of installation bolts, falling of rivets and the like are effectively avoided, the assembly process difficulty of the voltage regulating switch is reduced, and the size of the on-load voltage regulating switch is reduced due to the fact that the bolts and the rivets are cancelled, so that the overall size of the on-load voltage regulating transformer is reduced, and meanwhile, the manufacturing cost is obviously reduced.
2. The on-load voltage-regulating switch device of the transformer adopts the design of installing the transition plate, avoids the trouble that a hanging plate or an installing flange needs to be additionally designed on the top cover of the transformer or an installing frame needs to be designed on the iron core clamping piece of the transformer in the traditional on-load voltage-regulating switch, is simple to install and reduces the assembling difficulty. Compared with the traditional secondary outlet structure installation and sealing structure design, the number of accessories in the complete assembly process of the on-load tap changing transformer is reduced, and the assembly difficulty is also reduced.
Drawings
Fig. 1 is a schematic external perspective view of the on-load tap changer of the present invention;
fig. 2 is a schematic perspective view of the on-load tap changer of the transformer of the present invention with the top case removed;
fig. 3 is a schematic perspective view of the on-load tap changer of the transformer of the present invention with a part of the transition resistor and the tap transmission plate removed;
fig. 4 is a schematic diagram of a bottom case of the on-load tap changer of the transformer of the present invention;
fig. 5 is a schematic view of a mounting structure of a fixed contact of the on-load tap changer of the transformer of the present invention;
FIG. 6 is a schematic structural view of a vacuum diverter switch actuator;
FIG. 7 is one of the schematic structural views of the voltage regulating selection switch transmission mechanism;
FIG. 8 is a second schematic view of the structure of the transmission mechanism of the voltage-regulating selection switch;
fig. 9 is a schematic perspective view of the on-load tap changer of the transformer of the present invention with the bottom case removed;
FIG. 10 is a perspective exploded view of the secondary take-off mechanism;
FIG. 11 is one of schematic plan views of a secondary take-off mechanism;
FIG. 12 is a second schematic plan view of the secondary take-off mechanism;
FIG. 13 is a schematic perspective view of a specially-made compression nut;
fig. 14 is a schematic view of the tap loop of the on-load tap changer arrangement of the present invention.
In the figure: 1-a bottom shell, 101-a driving clamping groove, 102-a switching clamping groove, 103-a contact fixing table and 104-a resistor boss;
2-top shell, 3-driving mechanism;
4-vacuum change-over switch, 401-switch transmission plate, 402-drive shifting fork, 403-limit baffle;
5-driving a clamping module, 501-clamping a block and 502-clamping an elbow;
6-pressure regulating transmission plate;
7-a movable contact module, 701-a contact boss, 702-a baffle, 703-a spring limiting shaft, 704-a spring, 705-a support ring and 706-a copper contact;
8-fixed contact, 9-secondary wire outgoing mechanism, 901-installation transition plate, 902-installation screw sleeve, 903-sealing washer, 904-sealing washer pressing ring, 905-special pressing nut, 906-butadiene acrylonitrile rubber terminal, 907-terminal pressing pad and 908-secondary wire outgoing terminal;
10-transition resistance, 11-transformer top cover and 12-switch wiring terminal.
Detailed Description
The transformer on-load tap changer device of the present invention is described in more detail by the specific embodiments with reference to the attached drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
According to the transformer on-load tap changer, the on-load tap changer adopts a clamping type and nested type installation mode, traditional bolt installation and rivet installation are replaced, the risks of loosening of installation bolts, falling of rivets and the like are effectively avoided, the difficulty of the tap changer assembly process is reduced, the size of the on-load tap changer is reduced due to the fact that the bolts and the rivets are cancelled, and therefore the cost is reduced due to the fact that the size of the whole on-load tap changer is reduced. Specifically, referring to fig. 1 to 3, the bottom shell 1 and the top shell 2 are integrally formed and buckled with each other, and the bottom shell 1 and the top shell 2 are both formed by DMC material high-temperature die casting, so that the number of parts is obviously reduced, and the assembly is more convenient and faster. Specifically, a driving mechanism 3 is detachably arranged at one end inside the bottom shell 1, the driving mechanism 3 is embedded in a driving clamping groove 101 which is integrally formed on the bottom shell and the top shell, and the driving mechanism 3 is composed of four groups of permanent magnetic mechanisms; the right upper part of the bottom shell 1 is detachably provided with three groups of vacuum change-over switches 4, the three groups of vacuum change-over switches 4 are linearly and uniformly distributed, and the vacuum change-over switches 4 are clamped and arranged in a change-over switch clamping groove 102 integrally formed on the bottom shell; the bottom shell is characterized in that three groups of static contacts 8 are detachably arranged on the lower right portion of the bottom shell 1, the static contacts 8 are clamped on a contact fixing table 103 which is integrally formed on the bottom shell, the static contacts 8 and a switch wiring terminal 12 are integrally formed, and the switch wiring terminal 12 penetrates out of the bottom shell 1 downwards to be used for externally connecting a cable.
Further, referring to fig. 3, 4 and 6, in order to realize the function of on-load voltage regulation, the switching device further includes a vacuum transfer switch transmission mechanism driven by the driving mechanism, the vacuum transfer switch transmission mechanism is disposed in a gap between the vacuum transfer switches 4 of each group and detachably connected to the vacuum transfer switches 4, and the driving mechanism 3 drives the corresponding vacuum transfer switches 4 to be separated and combined; specifically, vacuum change over switch drive mechanism includes switch driving plate 401 and drive shift fork 402, wherein, switch driving plate 401 adopts DMC material high temperature die-casting shaping, it sets up drive shift fork 402 to distribute in turn on switch driving plate 401's the relative lateral wall, in every group vacuum change over switch 4 sets up in opposite directions, the cooperation of pegging graft of drive shift fork 402 sets up in the end plate inboard that 4 action shaft ends of vacuum change over switch set up.
In order to realize simple and reliable connection between the switch transmission plate and the driving mechanism, referring to fig. 2 and 6, one end of the switch transmission plate 401, which is close to the driving mechanism, is provided with a driving clamping module 5, the driving clamping module 5 comprises a clamping block 501 and a clamping elbow 502, the end part of the clamping block 501 is in a Y shape, matching grooves are formed in two side walls of the clamping block, the clamping elbow 502 is in a C shape and is fixedly arranged at the output shaft end of the driving mechanism 3, and a clamping jaw at the tail end of the clamping elbow 502 is inserted into the matching groove of the clamping block 501 to realize clamping fixation; the end surface of the clamping block 501 is provided with a shaft end limiting groove, and the output shaft end of the driving mechanism 3 is clamped in the shaft end limiting groove of the clamping block; two limit baffles 403 are distributed on the switch transmission plate 401 along the length direction, and the limit baffles 403 and the shift switch clamping groove 102 integrally formed on the bottom case 1 interfere to realize sliding limit, so that the opening and closing degree of the vacuum shift switch 4 is ensured, and the service life of the vacuum shift switch is prolonged.
In order to realize the purpose of on-load voltage regulation, referring to fig. 2, fig. 7 and fig. 8, the switching device further comprises a voltage regulation selection switch transmission mechanism driven by the driving mechanism, the voltage regulation selection switch transmission mechanism comprises a voltage regulation transmission plate 6, two limit baffles are distributed and arranged on the voltage regulation transmission plate along the length direction, and the limit baffles interfere with the contact fixing table integrally formed on the bottom shell and the top shell to realize sliding limit. The voltage-regulating selective switch transmission mechanism is arranged above the three groups of static contacts 8, a movable contact module 7 arranged on the voltage-regulating transmission plate 6 is arranged between the static contacts 8 in each group, and the movable contact module 7 is driven by the voltage-regulating transmission plate 6 and is arranged between the static contacts 8 in a sliding manner to realize voltage regulation.
Specifically, referring to fig. 7 and 8, the moving contact module 7 includes a contact boss 701 integrally disposed on a lower bottom surface of the voltage-regulating transmission plate 6, a blocking piece 702 is fixedly disposed in the contact boss, two spring limiting shafts 703 are coaxially disposed on two sides of the blocking piece, a spring 704 is sleeved on the spring limiting shaft 703, a support ring 705 is sleeved on peripheries of the contact boss 701 and the spring 704, copper contacts 706 are fixedly disposed on two side walls of the support ring, and the voltage-regulating transmission plate 6 drives the support ring 705 and the copper contacts 706 to slide and switch between the static contacts 8 of each group by means of the spring 704, so as to realize on-load voltage regulation. Due to the arrangement of the spring 704 and the support ring 705, the copper contact 706 can be firmly contacted with the static contact 8 for conducting electricity, and hard abutting damage to the static contact 8 is avoided, so that the service lives of the copper contact 706 and the static contact 8 are further prolonged.
In this embodiment, referring to fig. 6, a driving clamping module 5 is disposed at one end of the voltage-regulating transmission plate close to the driving mechanism, and the driving clamping module has the same structure as the driving clamping module at the end of the switch transmission plate, and is not described herein again.
In addition, the switch device of the invention further comprises three transition resistors 10 with the same number as the vacuum change-over switch groups, the transition resistors 10 are clamped on the resistor boss 104 integrally formed on the bottom shell, and the transition resistors 10 are positioned above the voltage-regulating transmission plate 6 and still assembled in a clamping manner, so that the overall reliability and the assembly cost are improved, and particularly refer to fig. 2 and 3. In summary, the moving contact module 7 and the static contact 8 are combined to select a high-voltage tap of the transformer, and the vacuum transfer switch is used for switching in and switching off a transition circuit, so that an on-load voltage regulation function is realized.
In this embodiment, referring to fig. 10 to fig. 13, a secondary outgoing line mechanism 9 is further disposed outside the bottom case and the top case that are fastened to each other, and a modular design is adopted, where the secondary outgoing line mechanism 9 includes an installation transition plate 901, an installation screw sleeve 902, a sealing washer 903, a sealing washer pressing ring 904, a specially-made pressing nut 905, a nitrile rubber terminal 906, a terminal pressing washer 907, and a secondary outgoing line terminal 908, the installation transition plate 901 is detachably and fixedly disposed on a top surface of one end of the top case 2, the installation screw sleeve 902 is a cylindrical barrel with a stepped inner hole and is welded to the top of the installation transition plate 901, the installation screw sleeve 902 penetrates through the through hole in the top cover 11 of the transformer and is sleeved with the sealing washer 903, the sealing washer 904 and the specially-made pressing nut 905 are sequentially disposed outside the installation screw sleeve 902 above the sealing washer, the nitrile rubber terminal 906 is disposed in the stepped inner hole of the installation screw sleeve 902, the terminal pressing washer 907 is disposed above the nitrile rubber terminal 906, and is pressed by the specially-made pressing nut 905, and the secondary outgoing line terminal 908 is led out from the nitrile rubber terminal 906 and penetrates through the specially-made pressing nut 905 for secondary outgoing line connection.
In this embodiment, referring to fig. 13, the specially-made compression nut 905 has a unique structure to realize a compression function, the specially-made compression nut 905 includes a nut body, a compression blind hole which is larger than a central screw hole of the nut and smaller than the diameter of an inscribed circle of the cross section of the nut is formed in the center of the bottom of the nut body, the compression blind hole and the central screw hole of the nut body are coaxially arranged, and the diameter of the compression blind hole is larger than that of the terminal compression pad, so that the terminal compression pad is located in the compression blind hole to realize compression assembly. The design of the mounting and sealing structure reduces the number of accessories in the complete assembly process of the on-load tap changer and obviously reduces the assembly difficulty.
For reference, referring to fig. 14, a schematic diagram of a voltage regulating loop of the on-load tap changer of the transformer of the present invention is shown, and the voltage regulating process is as follows: firstly, a normally open switch of a vacuum change-over switch is closed, so that a transition resistance loop is communicated with a first part of a winding and a wire outlet end of an integral voltage regulating loop, and the first part and a second part of the winding which are communicated with a normally closed switch of the vacuum change-over switch through a gear selection switch form a parallel loop, power is supplied at the same time, the transition resistance limits the internal circulation of the winding, then the normally closed switch of the vacuum change-over switch is disconnected, so that the loop where the gear selection switch is located is powered off, and the power supply of the transition resistance loop is kept continuous; then the gear selection switch selects the voltage regulating taps of the first part and the second part of windings in a combined mode in a conducting state under the condition of no electricity, and the voltage regulating gear selection function is completed; after the switch action is finished, the normally closed switch in the vacuum switch is closed to form the double-loop parallel power supply state; and finally, the normally open switch of the vacuum switch disconnects the transition resistance loop and restores the power supply to the loop where the gear selection switch and the normally closed switch of the vacuum switch are located.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" or "an" and the like in the description and in the claims of this application do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
Exemplary embodiments of the present invention have been described in detail with reference to the preferred embodiments, however, it will be understood by those skilled in the art that various changes and modifications may be made to the specific embodiments described above, and various combinations of the technical features and structures proposed by the present invention may be made without departing from the concept of the present invention.
Claims (8)
1. The utility model provides a transformer on-load tap changing switching device which characterized in that: comprises a bottom shell and a top shell which are integrally formed and buckled with each other; a driving mechanism is detachably arranged at one end inside the bottom shell and is embedded in a driving clamping groove integrally formed on the bottom shell; a plurality of groups of vacuum change-over switches are detachably arranged on the right upper part of the bottom shell, and the vacuum change-over switches are clamped and arranged in change-over switch clamping grooves which are integrally formed on the bottom shell and the top shell; a plurality of groups of fixed contacts are detachably arranged at the right lower part of the bottom shell, the fixed contacts are clamped and arranged on a contact fixing table which is integrally formed on the bottom shell, the fixed contacts and a switch binding post are integrally formed, and the switch binding post penetrates out of the bottom shell downwards and is used for being externally connected with a cable; the vacuum transfer switch transmission mechanism is arranged among the plurality of vacuum transfer switches and is detachably connected with the vacuum transfer switches, and the driving mechanism drives the corresponding vacuum transfer switches to be separated and combined; the voltage-regulating selection switch transmission mechanism is arranged above the multiple groups of static contacts, a movable contact module arranged on the voltage-regulating selection switch transmission mechanism is arranged between the static contacts in each group, and the movable contact module is driven by the voltage-regulating selection switch transmission mechanism and is arranged between the static contacts in a sliding manner to realize voltage regulation; still include a plurality of transition resistance the same with vacuum change over switch group number, the transition resistance joint sets up on drain pan integrated into one piece's resistance boss, and transition resistance is located pressure regulating selection switch drive mechanism top.
2. The on-load tap changer apparatus of claim 1, wherein: the vacuum change-over switch transmission mechanism comprises a switch transmission plate and driving shifting forks, the driving shifting forks are alternately distributed on opposite side walls of the switch transmission plate, the vacuum change-over switches in each group are oppositely arranged, and the driving shifting forks are arranged on the inner sides of end plates arranged at the end parts of action shafts of the vacuum change-over switches in a splicing matching mode.
3. The on-load tap changer of a transformer of claim 2, wherein: the switch driving plate is provided with a driving clamping module at one end close to the driving mechanism, the driving clamping module comprises a clamping block and a clamping elbow, the end part of the clamping block is Y-shaped, matching grooves are formed in two side walls of the clamping block, the clamping elbow is C-shaped and is fixedly arranged at the output shaft end of the driving mechanism, and a clamping jaw at the tail end of the clamping elbow is inserted into the matching groove of the clamping block to realize clamping fixation; a plurality of limiting baffles are distributed on the switch transmission plate along the length direction, and the limiting baffles and the shifting switch clamping groove which is integrally formed on the bottom shell generate interference to realize sliding limitation.
4. The on-load tap changer apparatus of claim 1, wherein: the pressure regulating selection switch transmission mechanism comprises a pressure regulating transmission plate, a plurality of limiting baffles are distributed and arranged on the pressure regulating transmission plate along the length direction, and the limiting baffles and the contact fixing table integrally formed on the bottom shell and the top shell generate interference to realize sliding limitation.
5. The on-load tap changer apparatus of claim 4, wherein: the moving contact module comprises a contact boss integrally arranged on the bottom surface of the moving contact module under the pressure regulating transmission plate, springs are arranged on two sides of the contact boss, a support ring is sleeved on the periphery of the contact boss and the springs, copper contacts are fixedly arranged on two side walls of the support ring, and the pressure regulating transmission plate drives the support ring and the copper contacts to slide and switch between static contacts of each group by means of the springs.
6. The on-load tap changer of a transformer according to claim 4, wherein: the pressure regulating driving plate is close to actuating mechanism one end and is provided with drive joint module, drive joint module includes joint piece and joint elbow, joint piece tip becomes the Y type, and sets up the cooperation groove on the both sides wall, the joint elbow is the C type, and fixed the output axle head that sets up in actuating mechanism, the terminal jack catch grafting of joint elbow realizes that the joint is fixed in the cooperation inslot of joint piece.
7. The on-load tap changer arrangement of a transformer according to any one of claims 1-6, characterized by: the secondary wire outgoing mechanism comprises an installation transition plate, an installation screw sleeve, a sealing washer, a sealing gasket pressing ring, a specially-made pressing nut, a nitrile rubber terminal, a terminal pressing pad and a secondary wire outgoing terminal, the installation transition plate is detachably and fixedly arranged on the top surface of one end of the top shell, the installation screw sleeve is a cylindrical barrel with a step inner hole and is welded to the top of the installation transition plate, the installation screw sleeve penetrates out of a through hole of the top cover of the transformer and is sleeved with the sealing washer, the sealing gasket pressing ring and the specially-made pressing nut are sequentially arranged outside the installation screw sleeve above the sealing washer, the nitrile rubber terminal is arranged in the step hole of the installation screw sleeve, the terminal pressing pad is arranged above the nitrile rubber terminal and is pressed by the specially-made pressing nut, and the secondary wire outgoing terminal is led out of the nitrile rubber terminal and penetrates through the specially-made pressing nut and is used for secondary wire outgoing.
8. The on-load tap changer of a transformer of claim 7, wherein: the specially-made compression nut comprises a nut body, a compression blind hole which is larger than a central screw hole of the nut and smaller than the diameter of an inscribed circle of the cross section of the nut is formed in the center of the bottom of the nut body, the compression blind hole and the central screw hole of the nut body are coaxially arranged, and the diameter of the compression blind hole is larger than that of the terminal compression pad.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211059697.0A CN115346781B (en) | 2022-09-01 | 2022-09-01 | On-load voltage regulating switch device of transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211059697.0A CN115346781B (en) | 2022-09-01 | 2022-09-01 | On-load voltage regulating switch device of transformer |
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| CN115346781A true CN115346781A (en) | 2022-11-15 |
| CN115346781B CN115346781B (en) | 2024-06-18 |
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| CN202211059697.0A Active CN115346781B (en) | 2022-09-01 | 2022-09-01 | On-load voltage regulating switch device of transformer |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150027989A1 (en) * | 2012-04-20 | 2015-01-29 | Maschinenfabrik Reinhausen Gmbh | On-load tap changer |
| US20150028978A1 (en) * | 2012-04-20 | 2015-01-29 | Alfred Bieringer | Distribution transformer for voltage regulation of local distribution networks |
| CN110223866A (en) * | 2018-03-01 | 2019-09-10 | 济南爱迪电气设备有限公司 | A kind of miniaturization on-load voltage regulating switch and load voltage-regulating method |
| CN211957481U (en) * | 2020-04-07 | 2020-11-17 | 山东民生电气设备有限公司 | Miniaturized on-load voltage-regulating and capacitance-regulating switch and on-load voltage-regulating and capacitance-regulating transformer |
-
2022
- 2022-09-01 CN CN202211059697.0A patent/CN115346781B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150027989A1 (en) * | 2012-04-20 | 2015-01-29 | Maschinenfabrik Reinhausen Gmbh | On-load tap changer |
| US20150028978A1 (en) * | 2012-04-20 | 2015-01-29 | Alfred Bieringer | Distribution transformer for voltage regulation of local distribution networks |
| CN110223866A (en) * | 2018-03-01 | 2019-09-10 | 济南爱迪电气设备有限公司 | A kind of miniaturization on-load voltage regulating switch and load voltage-regulating method |
| CN211957481U (en) * | 2020-04-07 | 2020-11-17 | 山东民生电气设备有限公司 | Miniaturized on-load voltage-regulating and capacitance-regulating switch and on-load voltage-regulating and capacitance-regulating transformer |
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| CN115346781B (en) | 2024-06-18 |
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