CN112201496A - Driving device for transformer voltage regulating switch operating mechanism - Google Patents
Driving device for transformer voltage regulating switch operating mechanism Download PDFInfo
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- CN112201496A CN112201496A CN202011278722.5A CN202011278722A CN112201496A CN 112201496 A CN112201496 A CN 112201496A CN 202011278722 A CN202011278722 A CN 202011278722A CN 112201496 A CN112201496 A CN 112201496A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 63
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 33
- 230000000712 assembly Effects 0.000 claims abstract description 7
- 238000000429 assembly Methods 0.000 claims abstract description 7
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 26
- 230000003068 static effect Effects 0.000 claims description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 150000003376 silicon Chemical class 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 230000002457 bidirectional effect Effects 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 230000009471 action Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0011—Voltage selector switches
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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
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0027—Operating mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0038—Tap change devices making use of vacuum switches
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to the technical field of distribution and transformation of transformers. A driving device for a transformer voltage regulating switch operating mechanism is disclosed, which comprises an electromagnetic mechanism, a push rod, a pushing assembly and a driven piece. The electromagnetic mechanism is fixedly arranged, and the push rod penetrates through the electromagnetic mechanism and can be driven in the axial direction in a two-way mode. The pushing assemblies are symmetrically arranged at two ends of the push rod and comprise a pair of push blocks and a pair of ejector blocks. The invention realizes the bidirectional multi-gear driving of the driven piece by a simple and ingenious mechanical structure.
Description
Technical Field
The invention relates to the technical field of distribution and transformation of transformers, in particular to a driving device for a voltage regulating switch operating mechanism of a transformer.
Background
The voltage regulating switch of the transformer generally uses a vacuum arc-extinguishing chamber to control the on-off of each voltage regulating branch, and an operating mechanism for controlling the vacuum arc-extinguishing chamber needs a driving device. The mainstream driving devices include a spring energy storage type and an electromagnetic driving type. The spring energy storage type electromagnetic driving device has the defects of complex structure, more parts and complex manufacturing process, and the electromagnetic driving device is relatively simple in structure, less in parts, reliable in work and low in manufacturing cost.
The conventional electromagnetic driving device can only drive a single part to move back and forth at two stations, and is usually directly connected with a moving contact of a vacuum arc extinguish chamber to realize switching of a switching-on/switching-off position of the moving contact; for a voltage regulating switch comprising a plurality of vacuum arc-extinguishing chambers, each vacuum arc-extinguishing chamber is required to be individually provided with one set of electromagnetic driving mechanism for on-off control. Therefore, the volume of the whole voltage regulating switch is obviously increased, the number of parts is increased, and the cost is higher. In addition, the essence of the gear switching of the voltage regulating switch of the multi-gear transformer is switching among various opening and closing combination states of a plurality of switches (vacuum arc-extinguishing chambers) in the voltage regulating circuit, so that the opening and closing of each vacuum arc-extinguishing chamber have certain relevance, if all the vacuum arc-extinguishing chambers are independently controlled, the simultaneity of operation needs to be ensured, meanwhile, misoperation needs to be avoided, and certain switch opening and closing combinations under the misoperation can cause circuit short circuit and serious accidents occur.
The multi-gear transformer voltage regulating switch uses one set of operating mechanism to simultaneously switch the on-off states of a plurality of vacuum arc-extinguishing chambers, has a simple and reliable structure, but relates to the requirement of driving parts to move in two directions among a plurality of working positions (gears), and cannot be met by conventional electromagnetic driving.
Disclosure of Invention
The invention aims to provide a driving device for a transformer voltage regulating switch operating mechanism, which realizes bidirectional multi-gear driving of a driven part on the premise of keeping simple structure and not using a large number of parts or electronic control.
In order to achieve the above purpose, the technical scheme of the invention is as follows: a driving device for a transformer voltage regulating switch operating mechanism comprises an electromagnetic mechanism, a push rod, two sets of pushing assemblies and a driven piece; the electromagnetic mechanism is fixedly arranged, and the push rod penetrates through the electromagnetic mechanism and can be driven in two directions along the axial direction; the two sets of pushing assemblies are symmetrically arranged at two ends of the pushing rod and comprise pushing blocks and pushing blocks; the push block is arranged on a section of the two ends of the push rod extending out of the electromagnetic mechanism and is in sliding fit with the push rod, and the two ends of the push rod are provided with limiting structures for limiting the push block to slide towards the direction far away from the electromagnetic mechanism; a push block tongue piece capable of sliding up and down is arranged in the push block, an elastic piece is arranged above the push block tongue piece, the lower end of the elastic piece extends out of the push block, and a chamfer inclined plane is arranged on one side far away from the electromagnetic mechanism; an elastic mechanism for pushing the push block to slide towards the direction far away from the electromagnetic mechanism is arranged between the push block and the electromagnetic mechanism on the push rod; the ejector block is fixedly arranged and can block the push block from moving towards the direction far away from the electromagnetic mechanism; the lower part of the ejector block is provided with a convex inclined plane which is respectively parallel to the chamfer inclined plane of the tongue piece of the ejector block at the same side and can be in sliding fit with the tongue piece of the ejector block; and a plurality of tooth grooves matched with the tongue pieces of the push block are formed at two ends of the upper part of the driven piece.
Among the above-mentioned technical scheme, under the default state of electromagnetic mechanism's unpowered, the elastic component that resets is pushing up both ends ejector pad respectively and is contacting with the kicking block, and the ejector pad is pushing up catch bar tip limit structure respectively, and the catch bar is in electromagnetic mechanism central point naturally and puts, marks as initial position. Under the default state, the tongue piece of the push block in the push block is propped against the convex inclined surface of the top block, and most of the tongue piece is contracted in the push block.
The axial direction of the push rod is used as the left-right direction. When the electromagnetic mechanism drives the pushing rod to move leftwards, the pushing rod simultaneously drives the pushing block on the right side to move leftwards; when the right push block moves leftwards and leaves the right ejector block, the tongue piece of the right push block is pushed by the built-in elastic piece to extend out, and the lower end of the tongue piece of the right push block extends into a tooth groove at the right end of the driven piece to drive the driven piece to move leftwards by a unit stroke. The right-hand spring mechanism is compressed during this process. After the electromagnetic mechanism stops being electrified, the right push block and the push rod return to the initial position under the action of the right elastic mechanism. In the process of rightwards resetting of the right push block, the tongue piece of the push block with the chamfer inclined plane is contacted with the right edge of the tooth groove of the driven piece like an inclined tongue lock and is upwards retracted into the push block, so that the driven piece still stays at the previous position after the push block and the push rod are reset. The above is the process of moving the driven member to the left by one unit stroke. Because the two ends of the upper part of the driven part are provided with a plurality of tooth grooves, the electromagnetic mechanism drives the push rod for a plurality of times in the same direction, so that the driven part can continuously move for a plurality of unit strokes in the same direction.
And the process is completely bilaterally symmetrical, when the electromagnetic mechanism drives the push rod to move rightwards, the driven piece can move rightwards by one unit of stroke. The driven member can thus be moved in two directions in multiple stages. Therefore, the driving device is applied to the operating mechanism of the voltage regulating switch of the transformer, and by matching with the design of other parts, each position of the driven part corresponds to a combined state of the on-off of the vacuum arc extinguish chamber, and the switching between multi-gear voltage regulating states can be realized.
Furthermore, the limiting structures at the two ends of the push rod are nuts screwed at the end part of the push rod.
Furthermore, the push block is provided with a transverse through hole so as to be sleeved on the push rod.
Furthermore, the elastic piece above the tongue piece of the push block is a spring, and the reset elastic piece on the push rod is a spring.
Furthermore, the distance between the two top blocks is equal to the distance between the limiting structures at the two ends of the push rod.
Further, the width of the tooth groove on the driven piece is equal to the width of the push block tongue piece.
Further, the tooth space interval of the driven element is equal to the distance of single movement of the push rod.
Further, the electromagnetic mechanism comprises a fixed frame, a pair of static armatures, a movable armature and an electromagnetic coil. The fixed frame is fixedly arranged, the static armatures are symmetrically arranged at two ends of the fixed frame, and the movable armatures are arranged on the fixed frame and are in sliding fit with the fixed frame and can move between the two static armatures. The pushing rod penetrates through the movable armature and the static armature, and the pushing rod is fixed with the movable armature and is in sliding fit with the static armature. The electromagnetic coils are divided into a left group and a right group and are arranged on the fixed frame.
And in a default state, the movable armature is at an initial position in the center of the fixed frame. When the left electromagnetic coil is electrified, the left static armature and the left moving armature are positioned in the magnetic field range of the coil, magnetization occurs, mutual attraction occurs, the moving armature approaches to the left static armature, and the pushing rod is driven to move leftwards. When the electromagnetic coil is not electrified, the push rod and the movable armature are reset to the initial position. Symmetrically, when the right electromagnetic coil is electrified, the right static armature and the right moving armature are magnetized to attract each other, and the moving armature drives the push rod to move rightwards.
Further, the fixing frame is composed of a pair of fixing frames and a plurality of laminated silicon steel sheets; the upper part and the lower part of the fixing frame are vertically and fixedly arranged at intervals, and the silicon steel sheet is clamped in the middle of the fixing frame; the silicon steel sheets are in a Chinese character 'shan' shape, an upper group of laminated silicon steel sheets and a lower group of laminated silicon steel sheets are arranged in the height direction, the opening of the lower silicon steel sheet group faces upwards, the opening of the upper silicon steel sheet group faces downwards, a space is reserved between the upper silicon steel sheet group and the lower silicon steel sheet group, and the movable armature iron and the static armature iron are arranged in the space.
Drawings
Fig. 1 is a general schematic diagram of an embodiment of a five-gear transformer tap changer using the driving device of the present invention.
Fig. 2 is a schematic diagram of a five-pin polarity switch in the voltage regulating switch according to the present invention.
Fig. 3 is a schematic diagram of a transformer tap changer operating mechanism with an interlock function, which comprises the driving device.
Fig. 4 is a schematic view of the driving device of the present invention.
Fig. 5 is a front sectional view of the electromagnetic mechanism.
Fig. 6 is a left side view of the electromagnetic mechanism.
Fig. 7 is a schematic front view and a schematic left view of the U-shaped limiting stopper in fig. 3.
Figure 8 is a three-dimensional view of the U-shaped support member of figure 3.
Fig. 9 is a circuit connection diagram of the embodiment shown in fig. 1.
Detailed Description
The present invention will be further explained below with reference to the accompanying drawings by taking a five-step transformer tap changer with an interlock function, which uses the driving device of the present invention, as an embodiment.
Referring to fig. 1-4 (all of which are viewed as a top view), a five-stage transformer voltage regulating switch with an interlocking function includes a housing (not shown in the drawings), a bottom plate 100, a five-pin polarity switch Kj, a vacuum arc-extinguishing chamber module, a protection resistor 33, and a switch operating mechanism; the bottom plate is the rectangle, and parts or subassembly except that the shell all install on the bottom plate, the shell cover protects inside part on the bottom plate.
Fig. 2 shows the five-pin polarity switch Kj, which includes five connecting pins 6, two linkage plates 13, a connecting pin mounting seat 10 and a linkage plate driving device; the five connecting pins are distributed on the connecting pin mounting base 10 at intervals along a straight line, the two circular linkage pieces 13 are mounted on the linkage piece driving device, and the connecting line direction of the two circular linkage pieces is parallel to the straight line where the five connecting pins are located; the linkage sheet driving device comprises a limiting groove 14, a push rod 20, a pair of U-shaped supports 21 and an electromagnetic driver 24; the linkage piece 13 is arranged on a push rod 20 through a limiting groove 14 with a built-in spring, the push rod 20 is limited by a pair of U-shaped support limiting brackets 21 arranged on a bottom plate to move up and down, one end of the push rod is limited in a sliding groove of the limiting bracket 21 on the left side through a pin shaft, and the other end of the push rod is connected with an electromagnetic driver 24 and can slide axially;
the vacuum arc-extinguishing chamber module comprises 4 vacuum arc-extinguishing chambers K0, Ke, Km and K1 which are arranged in parallel, and an I-shaped supporting bar 32 and a four-position bracket 31 which are used for fixing the vacuum arc-extinguishing chambers.
Fig. 3 shows the switch operating mechanism, including a drive device and a limit linkage assembly.
Fig. 4 shows the driving device, which includes a fixed frame 41, static armatures 42 and 43, a movable armature 44, an electromagnetic coil 40, a pushing rod 45, a pair of pushing assemblies and a U-shaped limit stopper 53 as a driven member. The limit linkage assembly comprises a U-shaped limit movable piece 53, a U-shaped supporting fixed piece 60 and four tongue piece movable pieces 65. Wherein, the fixed mount, the static armature, the movable armature and the electromagnetic coil form an electromagnetic mechanism.
The fixed frame 41 is fixed on the bottom plate 100, the fixed armatures 42 and 43 are symmetrically arranged at two ends of the fixed frame 41, and the movable armature 44 is arranged on the fixed frame and is in sliding fit with the fixed frame and can move between the two fixed armatures. The pushing rod 45 transversely penetrates through the movable armature 44 and the static armatures 42 and 43, and the pushing rod 45 is fixed with the movable armature 44 and is in sliding fit with the static armatures. The electromagnetic coils 40 are divided into a left group and a right group and are arranged on the fixed frame, the left electromagnetic coil 401 partially covers the left static armature 42 and the movable armature 44, and the right electromagnetic coil 402 partially covers the right static armature 43 and the movable armature 44.
Specifically, as shown in fig. 5 and 6, the fixing frame 41 of the electromagnetic mechanism is composed of a pair of fixing frames 411 and a plurality of laminated silicon steel sheets 413; the fixing frame 411 is a rectangular ring, is arranged at intervals from top to bottom, is vertically fixed on the bottom plate 100 through 4L-shaped brackets 415, and silicon steel sheets 413 are clamped between the fixing frames 411; the silicon steel sheets 413 are in a chevron shape, two groups of upper and lower laminated silicon steel sheets are arranged in the height direction perpendicular to the bottom plate 100, the opening of the lower silicon steel sheet group faces upwards, the opening of the lower silicon steel sheet group faces downwards, a space is reserved between the upper and lower silicon steel sheet groups, and the movable armature 44 and the static armatures 42 and 43 are arranged in the space. Electromagnetic coils 401 and 402 (shown by the outline of the coil in fig. 4, and the bobbin around which the electromagnetic coil is wound in fig. 5 and 6) are respectively disposed in two rectangular spaces formed by two opposite silicon steel sheet groups in a chevron shape.
The pushing assemblies are symmetrically arranged at two ends of the pushing rod 45, the left side comprises a pushing block 46 and an ejector block 48, and the right side comprises a pushing block 47 and an ejector block 49. The push blocks 46 and 47 are provided with transverse through holes, the two push blocks are oppositely sleeved on sections of the two ends of the push rod 45 extending out of the electromagnetic mechanism and are in sliding fit with the push rod 45, and nuts are arranged at the two ends of the push rod to block the push blocks; the lower parts of the push blocks 46 and 47 are provided with longitudinal sliding groove holes, the sliding groove holes are respectively internally provided with a push block tongue piece 51 and a push block tongue piece 52 which can slide, and the bottoms of the sliding groove holes are provided with springs; the push block tongue piece is a rectangular column, the lower end of the left push block tongue piece 51 is provided with a chamfer inclined plane close to the left, and the lower end of the right push block tongue piece 52 is provided with an inclined plane chamfer close to the right. The push rod 45 is sleeved with a pair of return springs which are respectively positioned between the two push blocks and the electromagnetic mechanism. The ejector block is fixed on the bottom plate, the left ejector block 48 can block the push block 46 from moving leftwards, and the right ejector block 49 can block the push block 47 from moving rightwards; the lower parts of the ejector blocks 48 and 49 are provided with convex inclined surfaces which are respectively parallel to the chamfer inclined surfaces of the tongue pieces of the ejector blocks on the same side and can be in sliding fit with each other. The two ends of the upper part of the U-shaped limiting moving part 53 are provided with a plurality of tooth grooves matched with the pushing block tongue pieces, the width of each tooth groove is equal to that of the pushing block tongue pieces 51 and 52, and the distance between the tooth grooves is equal to the single movement stroke of the push rod 45. The distance between the contact surfaces of the ejector blocks 48 and 49 with the push blocks is equal to the distance between the contact surfaces of the nuts at the two ends of the push rod 45 with the push blocks.
The structure of the U-shaped limiting moving part 53 is a U-shaped double-layer structure as shown in the front view and the side view of fig. 7, and the four tongue moving parts 65 are installed in the hollow groove space in the middle; the structure of the U-shaped supporting fixed piece 60 is shown in the three-view of FIG. 8, and is also a U-shaped double-layer structure when seen from the side, and the hollow space in the middle can just accommodate the thickness of the U-shaped limiting movable piece 53; the three components form a five-layer laminated structure which is symmetrical up and down, and four pin shafts penetrate through the five-layer laminated structure and connect the five-layer laminated structure.
On the connection of the circuit, referring to fig. 9, a first connecting pin 1 is connected with a fifth connecting pin 5 and a tap X3 at the lower end of a regulating coil L2 in a regulating winding, a second connecting pin 2 is connected with the fixed end of a vacuum arc-extinguishing chamber Km, a third connecting pin 3 is connected with a tap X1 at the upper end of a regulating coil L1 in the regulating winding, a fourth connecting pin 4 is connected with a tap at the lower end of a main winding L and the fixed end of a vacuum arc-extinguishing chamber Ke, and a tap X2 connected with the middle of the regulating coil L1 and the L2 in the regulating winding is connected with the fixed end of the vacuum arc-extinguishing chamber K1. And an upper end tap of the main winding L is connected with the input end A of the whole voltage regulating switch circuit. The protection resistor 33 (R in the circuit diagram) and the vacuum interrupter K0 are connected in parallel to form a transition switching unit, which plays a role of protecting the circuit during switching. In the transition switching unit, the movable end of the vacuum arc extinguish chamber K0 is connected with the movable ends of the vacuum arc extinguish chambers Km and Ke and the output end X0 of the whole voltage regulating switch circuit, and the fixed end of the vacuum arc extinguish chamber K0 is connected with the movable end of the vacuum arc extinguish chamber K1.
With reference to fig. 9, the combination state of the polarity switch Kj and the on-off switches corresponds to each gear of the voltage regulating circuit as follows:
the first linkage structure is that the linkage sheet 11 is simultaneously communicated with the connecting pin 1 and the connecting pin 2, the linkage sheet 12 is simultaneously communicated with the connecting pin 3 and the connecting pin 4, and the switch states of all gears are as follows
Third gear: ke is closed, K0 is opened, and both L1 and L2 are not connected into the circuit, so that power is supplied by rated voltage;
fourth gear: ke is open, K1 is closed, K0 is closed, and L1 is connected into the circuit;
fifth gear: ke is open, Km is closed, K0 is open, and L1 and L2 are connected into the circuit;
the second linkage structure is that the linkage sheet 11 is simultaneously communicated with the connecting pin 2 and the connecting pin 3, the linkage sheet 12 is simultaneously communicated with the connecting pin 4 and the connecting pin 5, and the switch states of all gears are as follows
Third gear: ke is closed, K0 is opened, and both L1 and L2 are not connected into the circuit, so that power is supplied by rated voltage;
second gear: ke is opened, K1 is closed, K0 is closed, and L2 is reversely connected into the circuit;
first gear: ke is opened, Km is closed, K0 is opened, and L2 and L1 are reversely connected into the circuit;
the following describes how the switch operating mechanism in this embodiment realizes unified operation of the vacuum interrupter modules by taking an example of five-gear shifting as four-gear shifting.
As shown in fig. 1, the polarity switch is in the first linkage state, and the U-shaped limit stopper is at the leftmost position, and the state of the tongue stopper is defined by the former limit chute 54 as: corresponding to Km contraction, corresponding to K0, K1, Ke extension. That is, since the graph corresponds to a state where Km is closed and K0, K1, and Ke are open, the illustrated pressure regulating switch is in the fifth position where the boost pressure is highest.
The right electromagnetic coil 402 is electrified, under the magnetization effect, the right static armature 43 attracts the moving armature 44 to move rightwards, the push rod 45 also moves rightwards, the left nut drives the push block 46 to move rightwards, the moving distance is equal to the distance between the tooth grooves 58 above the U-shaped limiting moving part 53, and the moving distance is half of the horizontal length of the single limiting sliding groove 54. In the initial state, the chamfer of the lower end inclined plane of the push block tongue piece 51 is attached to the inclined plane of the top block 48 and limited in the chute hole of the push block 46, and when the push rod moves rightwards, the push block tongue piece is pushed by the built-in spring to extend downwards to the position of the dotted line in fig. 2 and is matched with the tooth groove 58, so that the U-shaped limiting moving piece 53 is driven to move rightwards. In the process, the return spring sleeved on the push rod 45 between the static armature 42 and the push block 46 is compressed; when the stop member 53 reaches a predetermined position, the electromagnetic coil 402 is powered off, the push rod 45 returns to the central position under the elastic force of the return spring, the chamfered inclined surface of the push block tongue piece 51 collides with the edge of the tooth groove 58, and the stop member is forced to retract into the sliding groove hole of the push block 46 like a latch bolt door lock, and the stop member remains at the pushed position due to friction force. The distance of the U-shaped limiting movable piece 53 moving rightwards is half of the length of the limiting sliding groove 54, so that the four tongue piece movable pieces 65 are respectively positioned in the middle of the limiting sliding groove 54 after moving.
By comparing the specific shape of each limiting chute in fig. 7, it can be known that after the chute 54a is displaced, the corresponding pin shaft is changed from the low position at the right end to the high position at the middle, and the corresponding vacuum arc-extinguishing chamber Km is disconnected; after the sliding groove 54b is displaced, the corresponding pin shaft is changed from the high position at the right end to the low position at the middle, and the corresponding vacuum arc-extinguishing chamber K0 is closed; after the sliding groove 54c is displaced, the corresponding pin shaft is changed from the high position at the right end to the low position at the middle, and the corresponding vacuum arc-extinguishing chamber K1 is closed; the upper and lower positions of the pin shaft before and after the displacement of the chute 54d are unchanged, and the corresponding vacuum arc-extinguishing chamber Ke is kept disconnected. So that the state of the voltage regulating circuit is changed from the fifth gear to the fourth gear.
If the electromagnetic coil 402 is energized once more, the above process is repeated, the U-shaped stopper 53 moves from the middle position to the rightmost position, and the four pins and the associated tongue piece 65 change from the middle position of the stopper chute 54 to the leftmost position. The pin shaft corresponding to the chute 54a is fixed, and Km is kept disconnected; the pin shaft corresponding to the sliding groove 54b is changed from the low position to the high position, and K0 is disconnected; the pin shaft corresponding to the chute 54c is changed from the low position to the high position, and K1 is disconnected; the pin shaft corresponding to the chute 54d is changed from the high position to the low position, and Ke is disconnected. So that the voltage regulating circuit is changed from the fourth gear to the third gear.
If the reverse boosting adjustment is needed, the left electromagnetic coil 401 is energized, and the push block 46 and the push block tongue piece 52 drive the U-shaped limit moving piece 53 to move leftwards in a completely symmetrical manner, so that the limit linkage assembly moves reversely as above, and the switching from the third gear to the fourth gear or from the fourth gear to the fifth gear is completed.
It should be noted that the present invention is not limited to the above embodiments, and those skilled in the art can implement the present invention in other embodiments according to the disclosure of the present invention, or make simple changes or modifications on the design structure and idea of the present invention, and fall into the protection scope of the present invention.
Claims (9)
1. A driving device for a transformer voltage regulating switch operating mechanism is characterized by comprising an electromagnetic mechanism, a push rod, two sets of pushing assemblies and a driven piece; the electromagnetic mechanism is fixedly arranged, and the push rod penetrates through the electromagnetic mechanism and can be driven in two directions along the axial direction; the two sets of pushing assemblies are symmetrically arranged at two ends of the pushing rod and comprise pushing blocks and pushing blocks; the push block is arranged on a section of the two ends of the push rod extending out of the electromagnetic mechanism and is in sliding fit with the push rod, and the two ends of the push rod are provided with limiting structures for limiting the push block to slide towards the direction far away from the electromagnetic mechanism; a push block tongue piece capable of sliding up and down is arranged in the push block, an elastic piece is arranged above the push block tongue piece, the lower end of the elastic piece extends out of the push block, and a chamfer inclined plane is arranged on one side far away from the electromagnetic mechanism; an elastic mechanism for pushing the push block to slide towards the direction far away from the electromagnetic mechanism is arranged between the push block and the electromagnetic mechanism on the push rod; the ejector block is fixedly arranged and can block the push block from moving towards the direction far away from the electromagnetic mechanism; the lower part of the ejector block is provided with a convex inclined plane which is respectively parallel to the chamfer inclined plane of the tongue piece of the ejector block at the same side and can be in sliding fit with the tongue piece of the ejector block; and a plurality of tooth grooves matched with the tongue pieces of the push block are formed at two ends of the upper part of the driven piece.
2. The driving apparatus for the transformer tap changer operating mechanism as claimed in claim 1, wherein said electromagnetic mechanism comprises a fixed frame, a pair of stationary armatures, a movable armature and an electromagnetic coil; the fixed frame is fixedly arranged, the static armatures are symmetrically arranged at two ends of the fixed frame, and the movable armatures are arranged on the fixed frame, are in sliding fit with the fixed frame and can move between the two static armatures; the pushing rod penetrates through the movable armature and the static armature, and the pushing rod is fixed with the movable armature and is in sliding fit with the static armature; the electromagnetic coils are divided into a left group and a right group and are arranged on the fixed frame.
3. The driving apparatus for the transformer tap changer operating mechanism as claimed in claim 1, wherein the limit structures at both ends of the push rod are nuts screwed on the ends of the push rod.
4. The driving apparatus for the transformer tap changer operating mechanism as claimed in claim 1, wherein the push block has a lateral through hole so as to be fitted over the push rod.
5. The driving device for the operating mechanism of the voltage regulating switch of the transformer as claimed in claim 1, wherein the elastic member above the tongue piece of the push block is a spring, and the elastic mechanism on the push rod is a spring sleeved on the push rod.
6. The driving apparatus for the transformer tap changer operating mechanism as claimed in claim 1, wherein a distance between the two top blocks is equal to a distance between the stoppers at both ends of the push rod.
7. The driving apparatus for the operating mechanism of the voltage regulating switch of the transformer as claimed in claim 1, wherein the width of the tooth groove on the driven member is equal to the width of the tongue piece of the push block.
8. The driving apparatus for the transformer tap changer operating mechanism as claimed in claim 1, wherein the pitch of the teeth grooves of the driven member is equal to the distance of a single movement of the push rod.
9. The driving apparatus for the operating mechanism of the voltage regulating switch of the transformer as claimed in claim 2, wherein said holder is composed of a pair of holding frames and a plurality of laminated silicon steel sheets; the upper part and the lower part of the fixing frame are vertically and fixedly arranged at intervals, and the silicon steel sheet is clamped in the middle of the fixing frame; the silicon steel sheets are in a Chinese character 'shan' shape, an upper group of laminated silicon steel sheets and a lower group of laminated silicon steel sheets are arranged in the height direction, the opening of the lower silicon steel sheet group faces upwards, the opening of the upper silicon steel sheet group faces downwards, a space is reserved between the upper silicon steel sheet group and the lower silicon steel sheet group, and the movable armature iron and the static armature iron are arranged in the space.
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| CN202011278722.5A CN112201496A (en) | 2020-11-16 | 2020-11-16 | Driving device for transformer voltage regulating switch operating mechanism |
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| CN202011278722.5A CN112201496A (en) | 2020-11-16 | 2020-11-16 | Driving device for transformer voltage regulating switch operating mechanism |
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