CN115346781B - On-load voltage regulating switch device of transformer - Google Patents
On-load voltage regulating switch device of transformer Download PDFInfo
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- CN115346781B CN115346781B CN202211059697.0A CN202211059697A CN115346781B CN 115346781 B CN115346781 B CN 115346781B CN 202211059697 A CN202211059697 A CN 202211059697A CN 115346781 B CN115346781 B CN 115346781B
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- 238000007906 compression Methods 0.000 claims description 33
- 230000007704 transition Effects 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 16
- 229920000459 Nitrile rubber Polymers 0.000 claims description 14
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 230000003068 static effect Effects 0.000 claims description 5
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Classifications
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (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; the device comprises a bottom shell, a plurality of groups of fixed contacts, a pressure regulating selection switch transmission mechanism, a plurality of groups of movable contact modules, a plurality of vacuum change-over switches, a plurality of groups of fixed contacts, a plurality of pressure regulating selection switch transmission mechanisms, a plurality of pressure regulating switch control mechanism and a plurality of control switches, wherein one end of the bottom shell is provided with a driving mechanism, the right upper part of the bottom shell is provided with a plurality of groups of vacuum change-over switches, the right lower part of the bottom shell is detachably provided with the plurality of groups of fixed contacts, the pressure regulating selection switch transmission mechanism is arranged above the plurality of groups of fixed contacts, and the movable contact modules are arranged between the fixed contacts in each group and driven by the pressure regulating selection switch transmission mechanism and are arranged between the fixed contacts in a sliding manner to realize pressure regulation; the on-load voltage regulating switch device adopts a clamping type and nested type installation mode, replaces the traditional bolt installation and rivet installation, effectively avoids the risks of loosening an installation bolt, falling off a rivet and the like, reduces the assembly process difficulty of the voltage regulating switch, reduces the overall size of the on-load voltage regulating 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 high-speed development of social economy in China, the annual electricity load is increased at about 10%, and with the improvement of the complexity of electricity generation and supply conditions, especially the large amount of intermittent energy sources such as photovoltaic and wind power are connected in the future, the voltage fluctuation of a power grid is further increased. Along with the improvement of the power supply quality requirements of people, higher requirements are also put forward for related functional departments.
The distribution transformer is generally a non-excitation manual voltage regulating transformer in the current market, and the conditions of high outlet voltage, low terminal voltage and high voltage in heavy load and light load of a transformer area exist. The fluctuation of voltage is further aggravated when new energy sources such as distributed wind power, photovoltaic and the like are connected with high-power pulsation loads such as electric vehicle charging and the like, and the quality of power supply voltage is affected. The low voltage can influence the output of electric equipment and even can not be used normally, the overheat burnout caused by the current of a motor is increased, 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 flux density of the transformer core is increased to cause magnetic saturation, the loss and noise of the transformer are increased, and the operation safety of the transformer is affected.
In order to improve the power supply quality, the on-load voltage regulation technology of the transformer is widely put into use 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 the electric appliance, but also has excellent energy-saving effect. The on-load voltage regulating switch in the current market has the defects that the installation of internal accessories by bolts and rivets is easy to break down, the assembly process is complex, the switch volume is large, the whole transformer assembly process is complex, the cost is high and the like. Therefore, how to overcome the above-mentioned technical problems and drawbacks becomes an important problem to be solved.
Disclosure of Invention
The invention aims to overcome the defects described in the background art, thereby realizing the on-load voltage regulating switch device of the transformer, the on-load voltage regulating switch device adopts a clamping type and nested type mounting mode, replaces the traditional bolt mounting and rivet mounting, effectively avoids the risks of loosening of a mounting bolt, falling off of a rivet and the like, reduces the difficulty of the assembly process of the voltage regulating switch, and reduces the volume of the on-load voltage regulating switch due to the elimination of the bolt and the rivet, thereby reducing the whole volume of the on-load voltage regulating transformer and lowering the cost.
In order to achieve the above purpose, the technical scheme of the invention is as follows: a transformer on-load voltage regulating switch device comprises a bottom shell and a top shell which are integrally formed and mutually buckled; the driving mechanism is detachably arranged at one end inside the bottom shell, is embedded into a driving clamping groove formed on the bottom shell and the top shell in an integrated manner, and consists of four groups of permanent magnet mechanisms; the upper right part of the bottom shell is detachably provided with a plurality of groups of vacuum change-over switches, and the vacuum change-over switches are clamped and arranged in a change-over switch clamping groove integrally formed on the bottom shell; the bottom shell is characterized in that a plurality of groups of fixed contacts are detachably arranged at the right lower part of the bottom shell, the fixed contacts are clamped on a contact fixing table integrally formed on the bottom shell, the fixed contacts and the switch binding posts are integrally formed, and the switch binding posts downwards penetrate out of the bottom shell and are used for an external connection cable.
The switching device also comprises a vacuum change-over switch transmission mechanism and a voltage-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 switching; the voltage-regulating selection switch transmission mechanism is arranged above the fixed contacts of the plurality of groups, a movable contact module arranged on the voltage-regulating selection switch transmission mechanism is arranged between the fixed contacts in each group, and the movable contact module is driven by the voltage-regulating selection switch transmission mechanism and is arranged between the fixed contacts in a sliding manner to realize voltage regulation.
In addition, the switching device also comprises a plurality of transition resistors with the same number as that of the vacuum change-over switch groups, wherein the transition resistors are clamped and arranged on the resistor bosses integrally formed on the bottom shell, and the transition resistors are positioned above the voltage-regulating selection switch transmission mechanism.
In the on-load voltage regulating switch device of the transformer, the vacuum change-over switch transmission mechanism comprises a switch transmission plate and a driving shifting fork, the driving shifting forks are alternately distributed on the 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 in plug-in fit with the inner sides of end plates arranged at the ends of the action shafts of the vacuum change-over switches.
In the on-load voltage regulating switch device of the transformer, 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 clamping elbows, the end part of the clamping block is Y-shaped, two side walls of the clamping block are provided with matching grooves, the clamping elbows are C-shaped and are fixedly arranged at the output shaft end of the driving mechanism, and the tail end clamping jaws of the clamping elbows are spliced and arranged in the matching grooves of the clamping block to realize clamping and fixing; the end face of the clamping block is provided with a shaft end limiting groove, and the output shaft end of the driving mechanism is clamped and arranged in the shaft end limiting groove of the clamping block; the switch transmission plate is provided with a plurality of limit baffles along the length direction, and the limit baffles interfere with the change-over switch clamping grooves integrally formed in the bottom shell to realize sliding limit.
In the on-load voltage regulating switch device of the transformer, the voltage regulating selection switch transmission mechanism comprises a voltage regulating transmission plate, a plurality of limit baffles are distributed on the voltage regulating transmission plate along the length direction, and the limit baffles interfere with contact fixing tables integrally formed on the bottom shell and the top shell to realize sliding limit.
In the on-load voltage regulating switch device of the transformer, the movable contact module comprises a contact boss integrally arranged with the lower bottom surface of the voltage regulating transmission plate, springs are arranged on two sides of the contact boss, supporting rings are sleeved on the periphery of the contact boss and the springs, copper contacts are fixedly arranged on two side walls of the supporting rings, and the voltage regulating transmission plate drives the supporting rings and the copper contacts to slide and switch between static contacts of each group by means of the springs.
In the on-load voltage regulating switch device of the transformer, the voltage regulating transmission plate is provided with a driving clamping module close to one end of the driving mechanism, the driving clamping module comprises a clamping block and clamping elbows, the end parts of the clamping block are Y-shaped, the two side walls of the clamping block are provided with matching grooves, the clamping elbows are C-shaped and are fixedly arranged at the output shaft ends of the driving mechanism, and the tail end clamping jaws of the clamping elbows are spliced and arranged in the matching grooves of the clamping block to realize clamping and fixing.
The on-load voltage regulating switch device of the transformer further comprises a secondary wire outlet mechanism, wherein the secondary wire outlet mechanism comprises an installation transition plate, an installation wire sleeve, a sealing gasket pressing ring, a special pressing nut, a nitrile rubber terminal, a terminal pressing pad and a secondary wire outlet terminal, the installation transition plate is detachably and fixedly arranged on the top surface of one end of the top shell, the installation wire sleeve is a cylindrical body with a stepped inner hole and is welded at the top of the installation transition plate, the sealing gasket is sleeved after the installation wire sleeve penetrates through a through hole of the top cover of the transformer, the sealing gasket pressing ring and the special pressing nut are sequentially arranged outside the installation wire sleeve above the sealing gasket, the nitrile rubber terminal is arranged in a stepped hole of the installation wire sleeve, the terminal pressing pad is arranged above the nitrile rubber terminal and is pressed by the special pressing nut, and the secondary wire outlet terminal is led out from the nitrile rubber terminal and penetrates through the special pressing nut for secondary wire connection.
In the on-load voltage regulating switch device of the transformer, the special compression nut comprises a nut body, a compression blind hole which is larger than a nut center wire hole 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 nut body center wire hole 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 positioned in the compression blind hole, and compression assembly of the terminal compression pad is realized.
The on-load voltage regulating switch device of the transformer has the beneficial effects that:
1. The voltage regulating transmission plate and the switch transmission plate of the transformer on-load voltage regulating switch device are respectively connected with the corresponding permanent magnet driving mechanisms by adopting clamping, and the transition resistor is also connected with the resistor boss integrally formed on the bottom shell by adopting clamping; the driving mechanism is arranged in a spliced driving clamping groove formed integrally on the bottom shell and the top shell in an embedded mounting mode, the moving contact of the voltage regulating switch is arranged on the switch transmission plate in a nested mode, and the fixed contact and the outgoing line terminal of the on-load voltage regulating switch are arranged on the bottom shell in an embedded mode. The clamping connection and nested mounting mode replaces the traditional bolt mounting and rivet mounting, so that risks such as loosening of mounting bolts and falling of rivets are effectively avoided, the assembling 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 omitted, and therefore the whole size of the on-load voltage regulating transformer is reduced, and meanwhile manufacturing cost is remarkably reduced.
2. The on-load voltage regulating switch device of the transformer adopts the design of installing the transition plate, avoids the trouble that the traditional on-load voltage regulating switch needs to additionally design and install a hanging plate or an installing flange on a top cover of the transformer or design and install a mounting frame on a clamping piece of a transformer iron core, and has simple installation and reduced assembly difficulty. Other accessories of the secondary wire outlet mechanism are designed in the same body with the installation transition plate, and compared with the traditional design of the installation and sealing structure of the secondary wire outlet structure, the number of accessories in the complete set assembly process of the on-load voltage regulating transformer is reduced, and the assembly difficulty is also reduced.
Drawings
Fig. 1 is a schematic view of an external perspective structure of a transformer on-load tap changer of the present invention;
FIG. 2 is a schematic perspective view of the transformer on-load tap changer of the present invention with the top casing removed;
FIG. 3 is a schematic diagram of a three-dimensional structure of the on-load voltage regulating switch device of the transformer of the invention with part of the transition resistor and the voltage regulating transmission plate removed;
fig. 4 is a schematic diagram of a bottom case perspective structure of a transformer on-load voltage regulating switch device according to the present invention;
Fig. 5 is a schematic diagram of an installation structure of a fixed contact of the on-load tap changer of the transformer of the present invention;
FIG. 6 is a schematic diagram of the vacuum switch gear mechanism;
FIG. 7 is one of the schematic structural diagrams of the voltage regulating selector switch transmission mechanism;
FIG. 8 is a second schematic diagram of a voltage regulating selector switch transmission mechanism;
FIG. 9 is a schematic perspective view of the transformer on-load tap changer of the present invention with the bottom case removed;
FIG. 10 is a schematic perspective exploded view of a secondary wire outlet mechanism;
FIG. 11 is a schematic plan view of a secondary wire outlet mechanism;
FIG. 12 is a second schematic plan view of the secondary wire outlet mechanism;
FIG. 13 is a schematic perspective view of a tailored compression nut;
Fig. 14 is a schematic diagram of a voltage regulating loop of the transformer on-load voltage regulating switching device of the present invention.
In the figure: 1-a bottom shell, 101-a driving clamping groove, 102-a switching switch clamping groove, 103-a contact fixing table and 104-a resistance boss;
2-top shell, 3-driving mechanism;
4-vacuum change-over switches, 401-switch transmission plates, 402-driving shifting forks and 403-limit baffles;
5-driving clamping modules, 501-clamping blocks and 502-clamping elbows;
6-a pressure regulating transmission plate;
7-moving contact modules, 701-contact bosses, 702-baffle plates, 703-spring limiting shafts, 704-springs, 705-supporting rings and 706-copper contacts;
8-static contacts, 9-secondary wire outlet mechanisms, 901-installation transition plates, 902-installation wire sleeves, 903-sealing gaskets, 904-sealing gasket compacting rings, 905-purpose-made compacting nuts, 906-nitrile rubber terminals, 907-terminal compacting pads and 908-secondary wire outlet terminals;
10-transition resistance, 11-transformer top cap, 12-switch terminal.
Detailed Description
The transformer on-load tap changer according to the present invention will be described in more detail with reference to the accompanying drawings by means of specific embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The transformer on-load voltage regulating switch device of the embodiment adopts a clamping type and nested type mounting mode, replaces the traditional bolt mounting and rivet mounting, effectively avoids the risks of loosening of mounting bolts, falling of rivets and the like, reduces the difficulty of the voltage regulating switch assembly process, and reduces the volume of the on-load voltage regulating switch due to the fact that bolts and rivets are omitted, so that the whole volume of the on-load voltage regulating transformer is reduced, and the cost is reduced. Specifically, referring to fig. 1-3, the novel vertical hinged door mainly comprises a bottom shell 1 and a top shell 2 which are integrally formed and mutually buckled, the bottom shell 1 and the top shell 2 are formed by adopting DMC materials at a height Wen Yazhu, the number of parts is obviously reduced, and the assembly is more convenient and quicker. Specifically, a driving mechanism 3 is detachably arranged at one end inside the bottom shell 1, the driving mechanism 3 is embedded into a driving clamping groove 101 integrally formed on the bottom shell and the top shell, and the driving mechanism 3 consists of four groups of permanent magnet mechanisms; three groups of vacuum switches 4 are detachably arranged at the right upper part of the bottom shell 1, the three groups of vacuum switches 4 are uniformly distributed in a straight line, and the vacuum switches 4 are clamped and arranged in a switch clamping groove 102 integrally formed in the bottom shell; the bottom right part of the bottom shell 1 is detachably provided with three groups of fixed contacts 8, the fixed contacts 8 are clamped and arranged on a contact fixing table 103 integrally formed on the bottom shell, the fixed contacts 8 and the switch binding post 12 are integrally formed, and the switch binding post 12 downwards penetrates out of the bottom shell 1 for external connection of cables.
Further, referring to fig. 3, 4 and 6, in order to realize the function of load voltage regulation, the switching device further includes a vacuum switch transmission mechanism driven by the driving mechanism, where the vacuum switch transmission mechanism is disposed in a gap between each group of vacuum switches 4 and is detachably connected with the vacuum switches 4, and the driving mechanism 3 drives the corresponding vacuum switches 4 to realize switching; specifically, the vacuum change-over switch transmission mechanism comprises a switch transmission plate 401 and a driving shifting fork 402, wherein the switch transmission plate 401 is formed by adopting DMC materials to be high Wen Yazhu, the driving shifting forks 402 are alternately distributed on the opposite side walls of the switch transmission plate 401, the vacuum change-over switches 4 in each group are oppositely arranged, and the driving shifting forks 402 are in plug-in fit with the inner side of an end plate arranged at the end part of an action shaft of the vacuum change-over switch 4.
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, two side walls are provided with matching grooves, the clamping elbow 502 is in a C shape and is fixedly arranged at the output shaft end of the driving mechanism 3, and the tail end clamping claw of the clamping elbow 502 is inserted and arranged in the matching groove of the clamping block 501 to realize clamping and fixing; the end face 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 and arranged 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 interfere with the switch clamping groove 102 integrally formed on the bottom shell 1 to realize sliding limit, so that the opening and closing degree of the vacuum switch 4 is ensured, and the service life of the vacuum switch is prolonged.
In order to achieve the purpose of on-load voltage regulation, see fig. 2, 7 and 8, the switch 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 on the voltage regulation transmission plate along the length direction, and the limit baffles interfere with contact fixing tables integrally formed on the bottom shell and the top shell to achieve sliding limit. The voltage regulation selector switch transmission mechanism is arranged above the three groups of fixed contacts 8, a moving contact module 7 arranged on the voltage regulation transmission plate 6 is arranged between the fixed contacts 8 in each group, and the moving contact module 7 is driven by the voltage regulation transmission plate 6 and is arranged between the fixed 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 baffle 702 is fixedly disposed in the contact boss, two spring limiting shafts 703 are coaxially disposed on two sides of the baffle, springs 704 are sleeved on the spring limiting shafts 703, supporting rings 705 are sleeved on peripheries of the contact boss 701 and the springs 704, copper contacts 706 are fixedly disposed on two side walls of the supporting rings, and the voltage-regulating transmission plate 6 drives the supporting rings 705 and the copper contacts 706 to slide and switch between fixed contacts 8 of each group by means of the springs 704, so that on-load voltage regulation is achieved. The arrangement of the spring 704 and the supporting ring 705 ensures that the copper contact 706 can be firmly contacted with the static contact 8 for conducting electricity, and can not cause hard abutting damage to the static contact 8, thereby further prolonging the service lives of the copper contact 706 and the static contact 8.
In this embodiment, referring to fig. 6, a driving clamping module 5 is disposed at one end of the voltage-regulating transmission plate, which is 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, which is not described herein again.
In addition, the switching device of the invention further comprises three transition resistors 10 with the same number as the vacuum switch groups, the transition resistors 10 are clamped and arranged on the resistor boss 104 integrally formed on the bottom shell, the transition resistors 10 are positioned above the voltage-regulating transmission plate 6, and the assembly is still carried out in a clamping manner, so that the overall reliability and the assembly cost are improved, and particularly, referring to fig. 2 and 3. In summary, the moving contact module 7 and the fixed contact 8 are combined to realize the selection of the high-voltage tap of the transformer, and the vacuum change-over switch is used for switching on and switching off the transition circuit, so that the existing load voltage regulation function is realized.
In this embodiment, referring to fig. 10 to 13, a secondary wire outlet mechanism 9 is further disposed outside a bottom shell and a top shell which are fastened to each other, and in a modular design, the secondary wire outlet mechanism 9 includes a mounting transition plate 901, a mounting wire sleeve 902, a sealing gasket 903, a sealing gasket compression ring 904, a special compression nut 905, a nitrile rubber terminal 906, a terminal compression pad 907 and a secondary wire outlet terminal 908, the mounting transition plate 901 is detachably and fixedly disposed on a top surface of one end of the top shell 2, the mounting wire sleeve 902 is a cylindrical body with a stepped inner hole, and is welded and disposed on the top of the mounting transition plate 901, the sealing gasket 903 is sleeved behind a through hole in the top cover 11 of the transformer, the sealing gasket compression ring 904 and the special compression nut 905 are sequentially disposed outside the mounting wire sleeve 902 above the sealing gasket, the nitrile rubber terminal 906 is disposed in a stepped hole of the mounting wire sleeve 902, the terminal compression pad 907 is disposed above the nitrile rubber terminal 906 and is compressed by the nitrile rubber terminal 905, and the secondary wire outlet terminal 908 is led out of the nitrile rubber terminal 905 and passes through the special compression nut 905.
In this embodiment, referring to fig. 13, the special compression nut 905 has a unique structure to realize the compression function, the special compression nut 905 includes a nut body, a compression blind hole larger than a nut center wire hole and smaller than the diameter of an inscribed circle of the nut cross section is provided at the center of the bottom of the nut body, and the compression blind hole and the nut body center wire hole are coaxially arranged, and the diameter of the compression blind hole is larger than the diameter of the terminal compression pad, so that the terminal compression pad is located in the compression blind hole to realize the compression assembly of the terminal compression pad. The design of the mounting and sealing structure reduces the number of accessories in the complete set assembly process of the on-load voltage regulating transformer, and remarkably reduces the assembly difficulty.
For reference, referring to fig. 14, a schematic diagram of a voltage regulating loop of the on-load voltage regulating switch device of the transformer according to the present invention is shown, and the voltage regulating process is as follows: firstly, closing a normally open switch of a vacuum switch, enabling a transition resistance loop to be communicated with a first part of a winding and an outlet end of an integral voltage regulating loop, forming a parallel loop with the first part and a second part of the winding which are communicated through a gear selection switch and a normally closed switch of the vacuum switch, supplying power at the same time, limiting circulation in the winding by the transition resistance, and then, disconnecting the normally closed switch of the vacuum switch, enabling the loop where the gear selection switch is located to be powered off, and enabling the transition resistance loop to be powered on to maintain power supply continuity; then, the gear selection switch selects the voltage-regulating tap of the first part and the second part of windings through the combination of the conducting state under the condition of no electricity, and the voltage-regulating gear selection function is completed; when the switch action is completed, a normally closed switch in the vacuum switch is closed, so that the double-loop parallel power supply state is formed; and finally, the normally open switch of the vacuum switch is disconnected with the transition resistance loop, and the power supply is recovered to the loop where the gear selection switch and the normally closed switch of the vacuum switch are positioned.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of the terms "a" and "an" and similar referents in the description and claims of the application are not necessarily to scale. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. "connected" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
While the exemplary embodiments of the present invention have been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that many changes and modifications can be made to the specific embodiments described above without departing from the spirit of the invention, and that many combinations of technical features and structures can be made without departing from the scope of the invention.
Claims (7)
1. The utility model provides a transformer on-load voltage regulating switching device which characterized in that: comprises a bottom shell and a top shell which are integrally formed and mutually buckled; one end inside the bottom shell is detachably provided with a driving mechanism, and the driving mechanism is embedded into a driving clamping groove integrally formed in the bottom shell; the upper right part of the bottom shell is detachably provided with a plurality of groups of vacuum change-over switches, and the vacuum change-over switches are clamped in change-over switch clamping grooves integrally formed on the bottom shell and the top shell; the right lower part of the bottom shell is detachably provided with a plurality of groups of fixed contacts, the fixed contacts are clamped and arranged on a contact fixing table integrally formed on the bottom shell, the fixed contacts and the switch binding posts are integrally formed, and the switch binding posts downwards penetrate out of the bottom shell and are used for an external connection cable;
The vacuum switching switch driving mechanism is arranged among the vacuum switching switches and is detachably connected with the vacuum switching switches, and the driving mechanism drives the corresponding vacuum switching switches to realize switching; the voltage-regulating selection switch transmission mechanism is arranged above a plurality of groups of fixed contacts, a movable contact module arranged on the voltage-regulating selection switch transmission mechanism is arranged between the fixed contacts in each group, and the movable contact module is driven by the voltage-regulating selection switch transmission mechanism and is arranged between the fixed contacts in a sliding manner to realize voltage regulation;
The transition resistors are clamped and arranged on the resistor bosses integrally formed on the bottom shell, and the transition resistors are positioned above the voltage-regulating selection switch transmission mechanism;
The secondary wire outlet mechanism comprises a mounting transition plate, a mounting wire sleeve, a sealing gasket pressing ring, a special pressing nut, a nitrile rubber terminal, a terminal pressing pad and a secondary wire outlet terminal, wherein the mounting transition plate is detachably and fixedly arranged on the top surface of one end of the top shell, the mounting wire sleeve is a cylindrical barrel with a step inner hole and is welded at the top of the mounting transition plate, the sealing gasket is sleeved after the mounting wire sleeve penetrates out of a through hole of the top cover of the transformer, the sealing gasket pressing ring and the special pressing nut are sequentially arranged outside the mounting wire sleeve above the sealing gasket, the nitrile rubber terminal is arranged in the step hole of the mounting wire sleeve, the terminal pressing pad is arranged above the nitrile rubber terminal and is pressed by the special pressing nut, and the secondary wire outlet terminal is led out from the nitrile rubber terminal and penetrates through the special pressing nut for secondary wire connection.
2. The transformer on-load tap changer of claim 1, wherein: the vacuum change-over switch transmission mechanism comprises a switch transmission plate and a driving shifting fork, wherein the driving shifting forks are alternately distributed on the 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 side of an end plate arranged at the end part of the action shaft of the vacuum change-over switch in a plug-in fit manner.
3. The transformer on-load tap changer of claim 2, wherein: the switch transmission 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 clamping elbows, the end part of the clamping block is Y-shaped, two side walls are provided with matching grooves, the clamping elbows are C-shaped and fixedly arranged at the output shaft end of the driving mechanism, and tail end clamping claws of the clamping elbows are spliced and arranged in the matching grooves of the clamping block to realize clamping and fixing; the switch transmission plate is provided with a plurality of limit baffles along the length direction, and the limit baffles interfere with the change-over switch clamping grooves integrally formed in the bottom shell to realize sliding limit.
4. The transformer on-load tap changer of claim 1, wherein: the voltage-regulating selector switch transmission mechanism comprises a voltage-regulating transmission plate, wherein a plurality of limit baffles are distributed on the voltage-regulating transmission plate along the length direction, and the limit baffles interfere with contact fixing tables integrally formed on the bottom shell and the top shell to realize sliding limit.
5. The transformer on-load tap changer of claim 4, wherein: the movable contact module comprises a contact boss integrally arranged with the lower bottom surface of the voltage-regulating transmission plate, springs are arranged on two sides of the contact boss, a supporting ring is sleeved on the periphery of the contact boss and the periphery of the springs, copper contacts are fixedly arranged on two side walls of the supporting ring, and the voltage-regulating transmission plate drives the supporting ring and the copper contacts to slide and switch between static contacts of each group by means of the springs.
6. The transformer on-load tap changer of claim 4, wherein: the pressure regulating drive 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 is the Y type, and sets up the cooperation groove on the both sides wall, the joint elbow is C type, and fixed the setting in actuating mechanism's output axle head, the terminal jack catch grafting of joint elbow sets up and realizes the joint fixedly in the cooperation inslot of joint piece.
7. The transformer on-load tap changer of claim 1, wherein: the special compression nut comprises a nut body, wherein a compression blind hole which is larger than a nut center wire hole 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 nut body center wire hole 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 CN115346781A (en) | 2022-11-15 |
| CN115346781B true CN115346781B (en) | 2024-06-18 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 | A miniaturized on-load voltage-regulating capacity-regulating switch and on-load voltage-regulating capacity-regulating transformer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012103490B4 (en) * | 2012-04-20 | 2015-11-12 | Maschinenfabrik Reinhausen Gmbh | Distribution transformer for voltage regulation of local networks |
| DE102012103489B4 (en) * | 2012-04-20 | 2015-11-12 | Maschinenfabrik Reinhausen Gmbh | On-load tap-changer and its use for voltage regulation in a distribution transformer |
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- 2022-09-01 CN CN202211059697.0A patent/CN115346781B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 | A miniaturized on-load voltage-regulating capacity-regulating switch and on-load voltage-regulating capacity-regulating transformer |
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| CN115346781A (en) | 2022-11-15 |
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