CN208970424U - A kind of dedicated on-load voltage regulating switch of distribution transformer and load tap changing distribution transformer - Google Patents

Abstract

The utility model patent discloses a kind of dedicated on-load voltage regulating switch of distribution transformer and load tap changing distribution transformer, the switch includes installation mainboard, insulating back panel, driving mechanism component, selection switch block, switching switch block, transition element, driving mechanism component includes stepper motor, gearbox, bevel gear, driving gear, square shaft, the rotational motion of stepper motor is transferred to driving gear by means of gearbox, bevel gear, driving gear drives square shaft rotation, and then selection switch block and switching switch block movement are driven, complete the conversion of pressure regulation gear.Realize the miniaturization of on-load voltage regulating switch, it is mounted in distribution transformer and does not change in its conventional shape and volume, frequent voltage adjusts in the case of realizing distribution transformer on-load, stabilize supply voltage, loss is reduced, realizes wide cut multi gear position and fining pressure regulation, while realizing the life cycle that the switch life period is equal to distribution transformer body, and the Maintenance free in its life cycle, improve the load tapchanging reliability of distribution transformer.

Description

A kind of dedicated on-load voltage regulating switch of distribution transformer and load tap changing distribution transformer

Technical field

The present apparatus is related to power product technical field, opens in particular to a kind of dedicated on-load voltage regulation of distribution transformer Pass and load tap changing distribution transformer.

Background technique

Distribution transformer is the afterbody transformer of power supply network, applied to the every field of national economy, throughout town and country Each corner, substantial amounts.Active service distribution transformer is non-excitation pressure adjustment mode, and when pressure regulation needs to be initially switched off power supply, then Non-excitation pressure adjustment switch is manually adjusted again, restores power transmission after adjustment again.Due to the ability pressure regulation that needs to have a power failure, and cannot accomplish Timely pressure regulation, so distribution transformer is equal to nothing adjusting pressure measure in actual power net, cause supply voltage qualification rate it is low, Stability is poor, is run using electric equipment abnormal, causes distribution transformer itself and electrical equipment to be lost and increases.As society passes through The continuous promotion development of Ji and power grid, will be higher and higher to quality of voltage requirement, thus to the reliability of on-load voltage regulation distribution transforming It is required that can be higher and higher, to meet different occasion demands, to the pressure regulation gear number and wide cut pressure regulation of load tap changing distribution transformer The demand of range can be also continuously increased.

In recent years, have and the on-load voltage regulating switch of main transformer is applied to the load tapchanging case of distribution transformer realization, but The on-load voltage regulating switch volume of main transformer is big and needs periodic maintenance, is not able to satisfy the reliability requirement of distribution transformer, uncomfortable With the distribution transformer of substantial amounts.Also have in the market and tune is carried using spring energy-storage mode and permanent magnetism, having for electromagnetic drive mode It compresses switch and is applied to distribution transformer, though and using vacuum extinction, the driving method of this type is used, when driving is driven Impact force is big, influences the service life of on-load voltage regulating switch associated components, its life cycle is made not to be able to satisfy distribution transformer Period projected life is not suitable for and uses in the distribution transformer of substantial amounts.

DE19743864C1 describes a kind of load ratio bridging switch using reactor transient mode, will select switching group Part and switching switch block are arranged on the same phase-plate, and complex structural designs, global switch occupied space is larger, and its On-load voltage regulation transition is carried out using reactor, the cost of on-load voltage regulating switch is considerably increased, is not suitable for matching for substantial amounts Piezoelectric transformer.

German MR company has applied for the Chinese invention patent of following application number in China: 1, application No. is 201780005054.9 entitled " load ratio bridging switch "；2, entitled application No. is 201780007088.1 " load ratio bridging switch, the adjustable transformer with load ratio bridging switch and the method for switching on-load tap-changer ".It is above-mentioned Two patents of invention only describe the selection component and switching component structure and action situation of load ratio bridging switch, for its drive Dynamic transmission mechanism is not illustrated.The projected life of distribution transformer is at least 30 years, to the reliable of on-load voltage regulating switch Property requires higher, and the function that above-mentioned two patents of invention are realized is the unremitting progress voltage adjusting of transformer, but reliable to its Property is not also illustrated.The drive part of on-load voltage regulating switch is also one of its core component, is not illustrated in invention Bright, if driving mechanism uses spring energy-storage or permanent magnetic drive mode, impact force is larger in handoff procedure, will substantially reduce The performance of voltage adjustment of on-load switch, influences the service life of load ratio bridging switch；It switchs every phase switching components and is all made of simultaneously Single vacuum interrupter and its mechanical mechanism cooperation switching, from N tap changing to N+1 tap, vacuum interrupter needs disconnected Opening and closing is closed twice, and the on-off of electric current is carried out in vacuum interrupter, more demanding to the contact of vacuum interrupter, is compared Vacuum interrupter on-off is primary during transferring the files, and reliability is low." load ratio bridging switch has patent of invention The adjustable transformer of on-load shunting switch and method for switching on-load tap-changer " is in patent of invention " load ratio bridging switch " base On plinth, it is provided with preselector, and increases a set of Malta's wheel to increase pressure regulation gear number, structure design is more complex, increases The length of switch is cylindrical type, increases it can be seen that it is two bars or stick used that it, which fixes each component, from its attached drawing The whole height of switch is suitable for distribution transformer from can be seen that it is directed in structure design in its description and the appended drawings The miniaturization on-load voltage regulating switch of device carries out utility model creation, and the volume size of load ratio bridging switch will affect distribution transformer Volume size, production cost and installation space, and distribution transformer need minimize, highly reliable on-load voltage regulating switch.

Summary of the invention

The purpose of the utility model is to provide a kind of dedicated on-load voltage regulating switch of distribution transformer, solution has in the prior art Voltage adjustment of on-load switch the problem of needing periodic maintenance, while solving in the prior art that on-load voltage regulating switch volume is big, is not easy to install The problem of, realize on-load voltage regulating switch miniaturization, the volume and shape for making it be not necessarily to change regular distribution transformer are installed, The long-life of realization on-load voltage regulating switch, non-maintaining characteristic, its life cycle is made to be equal to distribution transformer bulk lifetime.

In order to achieve the above objectives, the utility model adopts the following technical solution:

A kind of dedicated on-load voltage regulating switch of distribution transformer, it is characterised in that: including installing mainboard, insulating back panel, driving Mechanism assembly, selection switch block, switching switch block, transition element；

The driving mechanism component includes stepper motor, gearbox, bevel gear, driving gear, square shaft；

Position sensor is set in the gearbox, driving transmission process in directly carry out gear signal acquisition and Transmission；

The selection switch block, the switching switch block, the transition element respectively have three groups, are respectively completed three-phase tune Press the selection and switching of gear；

Switching switch block described in every group includes switching switch mainboard, two vacuum interrupters, two cams；

Selection switch block described in every group includes selection switch mainboard, two groups of Geneva mechanisms, contact assembly, roughing is carefully selected to drive Movable tooth, incomplete gear mechanism, roughing contact assembly, the Geneva mechanism include driver plate, sheave；

The stepper motor is mounted on the gearbox, and the gearbox, selection switch mainboard, the switching are opened Mainboard is closed to be fixed on the installation mainboard；

The insulating back panel is fixedly connected with one end of the selection switch mainboard, the switching switch mainboard；

The square shaft is applied in the selection switch mainboard, the switching switchs in mainboard；

The driving gear, the cam, the driver plate are sleeved on the square shaft；

Two vacuum interrupters are fixedly mounted on the side of the switching switch mainboard, the fixed peace of the transition element The mainboard other side is switched mounted in the switching；

Geneva mechanism described in two groups on selection switch block described in every group is separately mounted to the selection switch mainboard Two sides, the roughing sliding tooth are fixed on the sheave of one of them Geneva mechanism, the partial gear Mechanism is fixed on the side of the selection switch mainboard, and the roughing contact assembly is fixed on the selection by fixed column Switch the side of mainboard；

The roughing sliding tooth, the incomplete gear mechanism, the roughing contact assembly switch mainboard in the selection It is ipsilateral；

The rotational motion of the stepper motor is transferred to the driving gear by means of the gearbox, the bevel gear, The driving gear drives the square shaft rotation, and then drives the cam, driver plate rotation, and the cam pushes described true The on-off of empty arc-chutes completes the electrification switching of pressure regulation gear；The driver plate pushes the sheave movement, and the sheave drives institute It states and carefully selects contact assembly, roughing sliding tooth movement, carry out the not charged selection of pressure regulation gear；It is converted in corresponding pressure regulation gear When, the roughing sliding tooth drives the incomplete gear mechanism movement, and then drives the roughing contact assembly movement, with institute The not charged selection for carefully contact assembly being selected to complete pressure regulation gear jointly is stated, the adjustment of voltage is completed.

The positioning of a kind of preferred embodiment according to the present utility model, pressure regulation gear is controlled using the stepper motor Formulate position.

A kind of preferred embodiment according to the present utility model, the gearbox include cabinet, case lid, electronic circuit board, Position sensor, gear set, the motion information of the gear set is reached the electronic circuit board by the position sensor, described Electronic circuit board is analyzed and processed the gear positions of output on-load voltage regulating switch.

A kind of preferred embodiment according to the present utility model, the two cams difference switched in switch block Control the on-off of two vacuum interrupters.

A kind of preferred embodiment according to the present utility model, it is described that contact assembly is carefully selected to include two moving contacts, stationary contacts Head group, two moving contacts are respectively and fixedly installed on two sheaves in the selection switch block, the stationary contact Static contact in head group, which is fixed, to be applied on the selection switch mainboard, and quantity is identical as the number of teeth of the sheave；Carry out shelves When the selection of position, the sheave drives the moving contact rotation, selects corresponding static contact in the static contact group.

A kind of preferred embodiment according to the present utility model, the roughing contact assembly include a moving contact, two Static contact, contact fixed plate, the moving contact and described two static contacts are installed in the contact fixed plate, carry out pressure regulation It is described when the roughing sliding tooth, which is moved to, to be engaged with corresponding gear on the incomplete gear mechanism when gear is converted Roughing sliding tooth drives the incomplete gear mechanism movement, and the incomplete gear mechanism drives in the roughing contact assembly The moving contact no current selects the static contact in the corresponding roughing contact assembly.

A kind of load tap changing distribution transformer, which is characterized in that dedicated using the distribution transformer of aforementioned middle any structure The load tap changing distribution transformer of on-load voltage regulating switch.

Compared with the existing technology, the utility model has the beneficial effects that utility model a kind of distribution transformer is dedicated load Tap changer, is mounted in distribution transformer ontology, does not change regular distribution transformer shape and volume；It realizes distribution change Frequent voltage adjustment, stabilizes supply voltage, reduces loss, the utility model, which also achieves, matches in the case of depressor on-load The wide cut pressure regulation of piezoelectric transformer realizes its fault-free, non-maintaining company, it can be achieved that 17 grades ± 8 × 2.5% of wide cut pressure regulation Continuous pressure regulation acts 600,000 times or more, can accomplish in distribution transformer life cycle non-maintaining, and improving distribution transformer has The reliability of voltage adjustment of on-load.

Detailed description of the invention

Fig. 1 is the dedicated on-load voltage regulating switch overall structure diagram A of the utility model distribution transformer；

Fig. 2 is the dedicated on-load voltage regulating switch overall structure diagram B of the utility model distribution transformer；

Fig. 3 is the transmission internal structural scheme of mechanism of the dedicated on-load voltage regulating switch of the utility model distribution transformer；

Fig. 4 is that (switching is opened for the switching switch block schematic diagram of the dedicated on-load voltage regulating switch of the utility model distribution transformer Close the side of mainboard)；

Fig. 5 is the signal of the switching switch mainboard other side of the dedicated on-load voltage regulating switch of the utility model distribution transformer Figure；

Fig. 6 is the selection switch block overall schematic of the dedicated on-load voltage regulating switch of the utility model distribution transformer；

Fig. 7 is the selection switch block dismantling schematic diagram A of the dedicated on-load voltage regulating switch of the utility model distribution transformer；

Fig. 8 is the selection switch block dismantling schematic diagram B of the dedicated on-load voltage regulating switch of the utility model distribution transformer；

Fig. 9 is the selection switch block side removal sheave of the dedicated on-load voltage regulating switch of the utility model distribution transformer Structural schematic diagram；

Figure 10 is that the dedicated on-load voltage regulating switch of the utility model kind distribution transformer carries out carefully selecting gear selection switching sequence Schematic diagram.

Specific embodiment

The utility model is further described with reference to the accompanying drawing.Embodiment discussed below is only used for more clear Illustrate the technical solution of the utility model clearly, is the selected embodiment of the utility model, rather than whole embodiments, It cannot be used as a limitation the protection scope of the utility model.Those skilled in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1 to Fig. 9, which is that a kind of preferred distribution transformer that 17 grades of pressure regulation gears can be achieved of the utility model is dedicated, load The schematic diagram of tap changer, referring to shown in Fig. 1, Fig. 2, a kind of dedicated on-load voltage regulating switch of distribution transformer, including installation mainboard 1, insulating back panel 2, driving mechanism component 3, selection switch block 4, switching switch block 5, transition element 6；Driving mechanism component Including stepper motor 31, gearbox 32, bevel gear 33, driving gear 34, square shaft 35.

It is shown in Figure 3, gearbox 32 include cabinet 321, case lid 322, electronic circuit board 323, position sensor 324, Gear set 325；

Selection switch block 4, switching switch block 5, transition element 6 respectively have three groups, are respectively completed three phase voltage regulating gear Selection and switching；

Referring to fig. 4, shown in Fig. 5, every group of switching switch block 5 include switching switch 51, two vacuum interrupters 52 of mainboard, 53, two cams 54,55；Vacuum interrupter 52,53 is fixedly mounted on the one of switching switch mainboard 51 by associated anchor Side, two cams 54,55 are sleeved on square shaft 35, and transition element 6 is fixedly mounted on switching switch 51 other side of mainboard, this reality With the novel preferred transition resistance of transition element 6.

Referring to shown in Fig. 6, Fig. 7, Fig. 8, Fig. 9, every group selection switch block 4 includes selection switch 41, two groups of sheaves of mainboard Mechanism 42,43, carefully select contact assembly 44, roughing sliding tooth 45, incomplete gear mechanism 46, roughing contact assembly 47, sheave machine Structure 42,43 includes driver plate 421,431, sheave 422,432；Carefully selecting contact assembly 44 includes two moving contacts 441,442, static contact 443 are organized, the static contact quantity in static contact group 443 is identical as the number of teeth of sheave 422 or sheave 432, static contact group shown in Fig. 9 Include 9 static contacts；Roughing contact assembly 47 includes 471, two static contacts 472,473 of a moving contact, contact fixed plate 474；

Two groups of Geneva mechanisms 42,43 are separately mounted to the two sides of selection switch mainboard 41, and moving contact 441,442 is fixed respectively It is mounted on sheave 422,432, the static contact in static contact group 443 is fixed to be applied on selection switch mainboard 41, roughing driving Tooth 45 is fixed on the sheave 422 of one of Geneva mechanism 42, and incomplete gear mechanism 46 is fixed on selection and opens The side of mainboard 41 is closed, roughing contact assembly 47 is fixed on the side of selection switch mainboard 41 by fixed column；Roughing sliding tooth 45, incomplete gear mechanism 46, roughing contact assembly 47 are ipsilateral selection switch mainboard 41.

Stepper motor 31 is mounted on the gearbox 32, gearbox 32, selection switch mainboard 41, switching switch mainboard 51 It is fixed on installation mainboard 1, insulating back panel 2 is fixedly connected with one end of selection switch mainboard 41, switching switch mainboard 51, square shaft 35 are applied in selection switch mainboard 41, switching switchs in mainboard 51, driving gear 34, cam 54,55, the suit of driver plate 421,431 On square shaft 35.

The rotational motion of stepper motor 31 is transferred to driving gear 34, driving gear by means of gearbox 32, bevel gear 33 34 drive square shaft 35 to rotate, and then with moving cam 54,55, the rotation of driver plate 421,431, cam 54,55 is pushed true by drive rod The on-off of empty arc-chutes 52,53 completes the electrification switching of pressure regulation gear；Driver plate 421,431 pushes sheave 422,432 to move, slot Wheel 422,432 drives the moving contact 441 carefully selected in contact assembly 44,442, roughing sliding tooth 45 to act, moving contact 441,442 into Corresponding static contact in row selection static contact group 443, in the conversion of corresponding gear, roughing sliding tooth 45 is moved to and incomplete tooth When taking turns the respective gears engagement in mechanism 46, roughing sliding tooth 45 drives incomplete gear mechanism 46 to act, and then drives roughing Moving contact 471 in contact assembly 47 carries out the selection of corresponding static contact 472 or static contact 473, complete pressure regulation gear without Electric separation is selected, and the adjustment of voltage is completed.

It is that a kind of dedicated on-load voltage regulating switch progress of distribution transformer of the utility model carefully selects gear selection to cut referring to Figure 10 7 steps of process are changed, N, N+1 indicate that the two adjacent coil taps of tap-changing windings, A, B represent selection switch block in figure Two moving contacts 441,442, R in contact assembly 44 is carefully selected to represent transition element 6 in 4, D1, D2 represent switching switch block 5 In two vacuum interrupters 52,53.

From the N+1 tap-change operations of tap-changing windings to the timing of N tap head:

Step 1: moving contact A, B are connected with N+1 tap, and vacuum interrupter D1, D2 are turned on.Electric current is tapped by N+1 Head is flowed through through moving contact A, vacuum interrupter D2.

Step 2: vacuum interrupter D2 is disconnected, and moving contact A and N+1 tap disconnect, and moving contact B still connects with N+1 tap Logical, electric current is flowed through by N+1 tap through moving contact B, transition element 6, vacuum interrupter D1.

Step 3: moving contact B is still connected with N+1 tap, and moving contact A is transformed into N tap head by N+1 tap no current, Electric current is flowed through by N+1 tap through moving contact B, transition element 6, arc-chutes D1.

Step 4: moving contact B is still connected with N+1 tap, and vacuum interrupter D2 closure, moving contact A and N tap head are connected, Electric current is flowed through by N+1 tap through moving contact B, transition element 6, vacuum interrupter D1, and electric current is by N tap head through moving contact A, true Empty arc-chutes D2 flows through, and has of short duration circulation to generate between 1 tap of N+ and N tap head at this time.

Step 5: vacuum interrupter D1 is disconnected, and moving contact B and N+1 tap disconnect, and moving contact A is still connected with N tap head, Electric current is flowed through by N tap head through moving contact A, vacuum interrupter D2.

Step 6: moving contact A is still connected with N tap head, and moving contact B is transformed into N tap head by N+1 tap no current, electricity Stream is flowed through by N tap head through moving contact A, vacuum interrupter D2.

Step 7: moving contact A is still connected with N tap head, and vacuum interrupter D1 is connected, and moving contact B and N tap head are connected, electricity Stream is flowed through by N tap head through moving contact A, vacuum interrupter D2.

It is illustrated above in relation to the thin gear selecting position handoff procedure of on-load voltage regulating switch, selects the roughing portion in switch block Dividing is according to conventional on-load voltage regulation mode: coarse and fine voltage regulation principle, positive-negative voltage-regulation principle are designed, for the art Known to technical staff, it will not be described.The above entire selection handoff procedure, electric arc only occur in vacuum extinction room, no Pollution can be generated to transformer oil, not need periodically to carry out oil strain maintenance or replacement filter core, operation expense is greatly saved.

The utility model is in the dedicated on-load voltage regulating switch design of progress distribution transformer, from miniaturization, non-maintaining, service life The projected life of equivalent transformer is developed.The utility model carries out each portion using the enough installation mainboards of a tolerance intensity The fixed installation of part, to reduce the whole height of on-load voltage regulating switch；The roughing selection of on-load voltage regulating switch simultaneously and thin choosing choosing It selects associated components to be arranged on the same selection switch mainboard, compared to the switch being arranged on different installation mainboards, this reality It is simple, compact with novel structure design, reduce the length of switch, the whole design of switch is attributed to miniaturization.Using stepping electricity The flexible drive and precise positioning characteristic of machine 31 carry out the driving conversion and control positioning of pressure regulation gear, greatly reduce on-load voltage regulation To the impact force of its associated components (switching switch block, selection switch block) in switch driving transmission process, it is each to improve switch The real service life and reliability of component；Stepper motor 31 drives the gear set 325 in gearbox 32 to rotate, position sensor 324 reach the rotation information of gear set 325 in electronic circuit board 323, and electronic circuit board 323 is analyzed and processed direct output The location information of the gear positions of on-load voltage regulating switch, pressure regulation gear directly exports in gearbox 32, and conventional fault is omitted Rate height, insecure position switch feedback device, substantially increase service life and the operational reliability of on-load voltage regulating switch；Switching is opened Setting is closed in component 5 there are two vacuum interrupter 52,53, when pressure regulation gear switch, two vacuum interrupters 52,53 are only acted Once, it need to be acted twice compared to other one each gear switches of vacuum interrupter of setting, and need more complex mechanical machine Structure cooperation, if selecting the vacuum interrupter of same type, the utility model selects the service life of a vacuum interrupter to prolong compared with other It is one times long, improve the reliability of switch；By selecting aforementioned schemes, the utility model realizes the miniaturization of on-load voltage regulating switch And the characteristics of high reliablity, suitable for appropriate huge distribution transformer.It in the art can be excellent according to the utility model The embodiment of choosing improves, such as stepper motor can be replaced to combine control with motor mechanisms such as servo motor or linear motors Program is driven, and the protection scope of the utility model is also belonged to.

The voltage regulating mode of on-load voltage regulating switch is mainly three kinds: linear voltage regulation, positive-negative voltage-regulation, coarse and fine voltage regulation, this is practical new A kind of dedicated on-load voltage regulating switch of distribution transformer of type is applicable in, and positive-negative voltage-regulation, coarse and fine voltage regulation are only the coilings of tap-changing windings Mode and the mode of connection are different, using linear voltage regulation mode, press gear selection switching only with carefully recruiting for the utility model Associated components.In preferred embodiment, on-load voltage regulating switch 17 at most can be achieved using coarse and fine voltage regulation or positive-negative voltage-regulation The wide cut pressure regulation of shelves ± 8 × 2.5% can increase the gear and corresponding static contact number of sheave if still needing to the pressure regulation of more gears Amount, volume of switch can also increase therewith.Fig. 1 to Fig. 9 is a kind of the utility model preferably embodiment, gear number can according to The operating principle of family increase in demand or reduction, on-load voltage regulating switch is constant.

The above is only the preferred embodiment of the utility model, it is noted that for the technology people of the art Member for, without deviating from the technical principle of the utility model, several changes and improvements can also be made, these variation and Improvement also should be regarded as the protection scope of the utility model.

Claims (7)

1. a kind of dedicated on-load voltage regulating switch of distribution transformer, it is characterised in that: including installing mainboard, insulating back panel, driving machine Structure component, selection switch block, switching switch block, transition element；

The driving mechanism component includes stepper motor, gearbox, bevel gear, driving gear, square shaft；

Position sensor is set in the gearbox, the acquisition and biography of gear signal are directly carried out in driving transmission process It is defeated；

The selection switch block, the switching switch block, the transition element respectively have three groups, are respectively completed three phase voltage regulating shelves The selection and switching of position；

Switching switch block described in every group includes switching switch mainboard, two vacuum interrupters, two cams；

Selection switch block described in every group includes selection switch mainboard, two groups of Geneva mechanisms, carefully selects contact assembly, roughing driving Tooth, incomplete gear mechanism, roughing contact assembly, the Geneva mechanism include driver plate, sheave；

The stepper motor is mounted on the gearbox, the gearbox, selection switch mainboard, switching switch master Plate is fixed on the installation mainboard；

The insulating back panel is fixedly connected with one end of the selection switch mainboard, the switching switch mainboard；

The square shaft is applied in the selection switch mainboard, the switching switchs in mainboard；

The driving gear, the cam, the driver plate are sleeved on the square shaft；

Two vacuum interrupters are fixedly mounted on the side of the switching switch mainboard, and the transition element is fixedly mounted on The switching switchs the mainboard other side；

Geneva mechanism described in two groups on selection switch block described in every group is separately mounted to the two sides of the selection switch mainboard, The roughing sliding tooth is fixed on the sheave of one of them Geneva mechanism, the incomplete gear mechanism peace Dress is fixed on the side of the selection switch mainboard, and the roughing contact assembly is fixed on the selection switch master by fixed column The side of plate；

The roughing sliding tooth, the incomplete gear mechanism, the roughing contact assembly are same the selection switch mainboard Side；

The rotational motion of the stepper motor is transferred to the driving gear by means of the gearbox, the bevel gear, described Driving gear drives the square shaft rotation, and then drives the cam, driver plate rotation, and the cam pushes the vacuum to go out The on-off of arc chamber completes the electrification switching of pressure regulation gear；The driver plate pushes the sheave movement, and the sheave drives described thin Contact assembly, roughing sliding tooth movement are selected, the not charged selection of pressure regulation gear is carried out；In the conversion of corresponding pressure regulation gear, The roughing sliding tooth drives the incomplete gear mechanism movement, and then drives the roughing contact assembly movement, and described Carefully contact assembly is selected to complete the not charged selection of pressure regulation gear jointly, completes the adjustment of voltage.

2. the dedicated on-load voltage regulating switch of a kind of distribution transformer according to claim 1, which is characterized in that pressure regulation gear Positioning carries out control positioning using the stepper motor.

3. the dedicated on-load voltage regulating switch of a kind of distribution transformer according to claim 1, which is characterized in that the gearbox Including cabinet, case lid, electronic circuit board, position sensor, gear set, the position sensor believes the movement of the gear set Breath reaches the electronic circuit board, and the electronic circuit board is analyzed and processed the gear positions of output on-load voltage regulating switch.

4. the dedicated on-load voltage regulating switch of a kind of distribution transformer according to claim 1, which is characterized in that the switching is opened Close the on-off that two cams in component control two vacuum interrupters respectively.

5. the dedicated on-load voltage regulating switch of a kind of distribution transformer according to claim 1, which is characterized in that the thin choosing touching Head assembly includes two moving contacts, static contact group, and two moving contacts are respectively and fixedly installed in the selection switch block Two sheaves on, static contact in the static contact group is fixed to be applied on the selection switch mainboard, quantity and The number of teeth of the sheave is identical；When carrying out gear selection, the sheave drives the moving contact rotation, selects the static contact group In corresponding static contact.

6. the dedicated on-load voltage regulating switch of a kind of distribution transformer according to claim 1, which is characterized in that the roughing touching Head assembly includes a moving contact, two static contacts, contact fixed plate, and the moving contact is installed in described two static contacts In the contact fixed plate, when carrying out the conversion of pressure regulation gear, when the roughing sliding tooth moves to and the partial gear machine When corresponding gear engages on structure, the roughing sliding tooth drives the incomplete gear mechanism movement, the partial gear It is described in the corresponding roughing contact assembly that mechanism drives moving contact no current described in the roughing contact assembly to select Static contact.

7. a kind of load tap changing distribution transformer, which is characterized in that using the distribution transformer of any structure in preceding claims The load tap changing distribution transformer of the dedicated on-load voltage regulating switch of device.