CN2359795Y - Device for limitting main spindle rotating range in circuit breaker - Google Patents
Device for limitting main spindle rotating range in circuit breaker Download PDFInfo
- Publication number
- CN2359795Y CN2359795Y CN 98251822 CN98251822U CN2359795Y CN 2359795 Y CN2359795 Y CN 2359795Y CN 98251822 CN98251822 CN 98251822 CN 98251822 U CN98251822 U CN 98251822U CN 2359795 Y CN2359795 Y CN 2359795Y
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- CN
- China
- Prior art keywords
- circuit
- main shaft
- breaker
- lock bolt
- connecting rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a device for limiting a main shaft rotating range in a circuit breaker. In the circuit breaker, a lock bolt can be rotated by the manual operation of a switch handle or the disconnecting operation of a breaking device. Upper connecting rods connected with both sides of the lock bolt in rotation and lower connecting rods connected with the upper connecting rods in rotation can move in match, and thus a main shaft is rotated, wherein, device for limiting the main shaft rotating range is characterized in that when the switch handle moves to an on position, limiting pings used for blocking the lower part of the lock bolt and limiting the motion of the upper connecting rod are inserted in the central parts of the two connecting rods. Thus, the rotation of the main shaft is limited. Therefore, the reliability and the durability of a switching device can be raised.
Description
The utility model relates to a kind of device that is used in circuit-breaker restriction main shaft slewing area, particularly relate to following a kind of device that is used in circuit-breaker restriction main shaft slewing area, promptly when circuit-breaker is in on-state, the slewing area of main shaft can be limited very exactly, the durability of circuit-breaker can be improved thus.
Usually, circuit-breaker is installed in the domestic power supply distribution plate, perhaps is installed on the power distribution plate in the industrial circle.At unsupported state, circuit-breaker provides or deenergization to load end as switching device; And at load condition, circuit-breaker is supplied with or is cut off and send into the electric current of load end from power end by the abnormal current of induction at load end, thereby is used for protecting electric wire and power consumption equipment.
Circuit-breaker has the electric current limiting performance, can protective circuit and circuit connecting mechanism, under the circuit abnormal situation, cut off electric current rapidly, and prevent that fire from taking place.
The electric current limiting performance of circuit-breaker is divided into time-delay and disconnects, in time disconnects and disconnect in short-term.To be illustrated this below.
When 125% the electric current that surpasses the normal rating electric current continued to flow and surpasses the scheduled time, because the electric wire overload, it is overheated that electric wire is produced, but this fire hazard.Time-delay disconnects and being, and cuts off the operation of electric current before electric wire reaches uniform temperature.
In time disconnect and being, when circuit at load condition, produce under the situation of fault current (for example short circuit current) operation of disengagement failure electric current unusually by disconnection in time owing to load current.
Disconnect in short-term and being, when the circuit-breaker that is used for main circuit is connected with the circuit-breaker that is used for branch circuit, under break down the situation of electric current near the branch circuit of load end in the position, be used in disconnection disconnecting the circuit-breaker that is used for branch circuit before the circuit-breaker of main circuit, thereby make the operation of time-delay opening time of the circuit-breaker that is used for main circuit.Have only the sort of circuit breaker of adjusting instantaneous cut off value to have such feature.
Conventional electric circuit breakers with above-mentioned current limiting performance can have various ways at aspects such as its physical dimension, number of electrodes, modes of operation.But as shown in Figure 1, circuit-breaker comprises substantially: main body 1 is installed in the lid 2 of disconnecting apparatus on the main body 1, switching device, arc chute assembly, terminal and main body covered 1.
2A, 2B and 2C are described in the switching device in the conventional electric circuit breakers with reference to the accompanying drawings.
Accompanying drawing 2A～2C is a vertical sectional view, and it has described the major part of the switching device in conventional electric circuit breakers respectively.This switching device comprises: be fixed on the side plate 30 on the main body (not shown); Lever 20, the top of described lever 20 connects switch knob 10, and the bottom of described lever 20 connects the lower central part of side plate 30 with rotary way, and is center of rotation with rotation axis 21; Lock bolt 40 rotates around rotation axis 41, and a side of lock bolt 40 (latch) is with a side of rotary way connection side plate 30, and opposite side connects switch knob 10 and main spring (not shown); Opposite side at side plate 30 is provided with lock bolt clamper 50, is used for clamping lock bolt 40, avoids it to rotate, and is connected with the secondary spring (not shown) in the bottom of clamper 50; Pawl 60 (nail), comprise extension, when electric current when load one side produces abnormal conditions, under disconnecting apparatus (a trip device) effect, pawl 60 rotates around rotation axis 61, then extension is used for promoting the top of lock bolt clamper 50, thereby makes the lock bolt 40 of rotation by clamper 50 clampings; The a pair of connecting rod 70 of going up connects the both sides of lock bolt 40 respectively with rotary way, and to go up connecting rod 70 be center of rotation with the rotation axis 42 of lock bolt 40 central extensions; Block 43 is arranged on bottom one side of lock bolt 40, and by a pair of rotation of going up connecting rod 70 of restriction, the slewing area of restriction main shaft 90 (following promptly can mention); A pair of lower link 80 connects the bottom of going up connecting rod 70, and is center of rotation with rotation axis 71; Plate-like main shaft 90, along with the rotation of console switch handle 10 or pawl 60,, plate-like main shaft 90 is rotated by the routing motion of last connecting rod 70 and lower link 80, rotation axis 91 stretches out at the middle part of main shaft 90, is fixed on to the lower eccentric of lower link 80 both sides of main shaft 90; Movable contactor 100 is along with main shaft 90 rotates, and is switched on or switched off electric current, and the middle body of movable contactor 100 is fixed on the rotation axis 91 of main shaft 90, is provided with contact point 101,102 at the two ends of movable contactor 100; Fixed contact 110,111 contacts with the contact point 101,102 of movable contactor 100 or separates.
The on-state, off-state and the closed condition that below description are comprised the conventional electric circuit breakers of above-mentioned switching device.
Shown in Fig. 2 A, in on-state, lock bolt clamper 50 clamping lock bolts 40 are avoided because of the reset response of main spring (not shown) lock bolt 40 being rotated, and the top of lock bolt clamper 50 touches the extension 62 of pawl 60.
So lock bolt 40 tends to leave lock bolt clamper 50 by the reset response of main spring (not shown), and be that rotate at the center, but lock bolt 40 can not leave lock bolt clamper 50 with rotation axis 41.So the contact point 101,102 of the movable contactor 100 that matches with lock bolt 40 contacts with fixing contactor 110,111, thus Continuous Flow overcurrent (on-state).
On the other hand, flow through state, shown in Fig. 2 A (on-state), occur under the abnormal conditions, carry out current limliting operation (opening operation) at the electric current of load end at electric current, as described below.
At first, be arranged on the lower inside that striker in the disconnecting apparatus (not shown) promotes pawl 60, so pawl 60 counterclockwise rotates for middle mind-set with rotation axis 61.
Thus, the top that the extension 62 of pawl 60 promotes the lock bolt clamper, under the reset response of main spring (not shown), feasible lock bolt 40 by lock bolt clamper 50 clampings against the sun rotates thus.
At this moment, pawl 60 returns the home position under the effect of secondary spring (not shown).
Simultaneously, shown in Fig. 2 B, switch knob 10 moves to open position along with the rotation of lock bolt 40.The last connecting rod 70 that is connected with lock bolt 40 engages with lower link 80, and therefore, the main shaft 90 that is connected with lower link 80 is that rotate at the center with rotation axis 91 prejudicially.So the contact point 101,102 that is connected to the movable contactor 100 on the main shaft 90 was opened with fixed contact respectively in 110,111 minutes, cut off electric current thus, shown in Fig. 2 B (off-state).
When by the opening operation turn-off current, in order to connect circuit breaker, shown in Fig. 2 C, switch knob 10 moves to the right side, and circuit-breaker is resetted, so that by lock bolt clamper 50 clamping lock bolts 40, and then is moved to the left switch knob 10, promptly enters on-position.
Shown in Fig. 2 A, by the driving switch device, make two contact points 101,102 of movable contactor 100 arrive fixed contact 110,111 respectively, electric current flows through circuit-breaker (on-state) thus.
Be in the switch knob of the on-state shown in Fig. 2 A by hand control, when cutting off circuit-breaker, by the lever 20 that connects switch knob 10, last connecting rod 70 and lower link 80 that is connected the main spring (not shown) and lever 20 interoperations, main shaft 90 is rotated with the sun, shown in Fig. 2 C.By the rotation of main shaft 90, the contact point 101,102 that connects the movable contactor 100 of main shaft 90 leaves fixed contact 110,111 respectively, cuts off electric current (closed condition) thus.
Shown in Fig. 2 C,, switch knob 10 is moved to the left enters on-position in order to descend the connection circuit-breaker in off position.Therefore shown in Fig. 2 A,, the contact point 101,102 of movable contactor 100 is contacted respectively with fixed contact 110,111, make electric current flow through circuit-breaker (on-state) thus by the driving switch device.
On the other hand, when connecting circuit-breakers by moving switch handle 10, by the lever 20 that connects switch knob 10 and comprise the main spring (not shown), the interoperation of going up the jockey of connecting rod 70 and lower link 80 rotates main shaft 90.At this, the angle maximum between last connecting rod 70 and the lower link 80.
At this, in order to cut off circuit-breaker once more by opening operation, when connecting circuit-breaker by switch knob 10, the slewing area of main shaft 90 should be restricted.
Therefore, if the rotation of main shaft 90 surpasses certain limit, the critical angle that main shaft 90 rotates increases.As a result, go up connecting rod 70 and lower link 80 even drive, main shaft 90 does not rotate yet, and therefore can not carry out opening operation.
Thus, in order to limit the slewing area of main shaft 90, shown in Fig. 2 A, 2B and 2C, in conventional electric circuit breakers, side at lock bolt 40 is provided with block 43, and the motion of connecting rod 70 in the restriction has limited the slewing area of the main shaft 90 that matches with linkage thus, and described linkage comprises connecting rod 70 and lower link 80.
In conventional electric circuit breakers, in the structure of the slewing area that limits main shaft 90, when switch knob 10 moves to on-position, form block 43 in lock bolt 40 bottoms one side, can limit a pair of motion of going up one of connecting rod 70 that is arranged on lock bolt 40 both sides, limit the motion of connecting rod on the opposite side with this.
But, under the situation that connecting rod 70 rotates on by block 43 restriction, being applied on the block 43 along the rotational motion of the fixing point of block 43, the braking force of block is concentrated the last connecting rod 70 that acts on a side.Produce defective thus, promptly owing to the repeated use switch, the reliability decrease of block 43, thereby reduced reliability and the durability of using switching device.
The purpose of this utility model provide a kind of in circuit-breaker the device of restriction main shaft slewing area, it can accurately limit the slewing area of main shaft when circuit-breaker is connected, and, can improve the operating reliability and the durability of switching device.
In order to realize above-mentioned purpose of the present utility model, a kind of device that is used in circuit-breaker restriction main shaft slewing area is provided, in circuit-breaker, by the manual operation of switch knob or the opening operation of disconnecting apparatus, lock bolt is rotated, and make last connecting rod that is connected rotationally with the both sides of locking a door and the lower link routing motion that is connected rotationally with last connecting rod, thereby main shaft is rotated; Wherein limiting main shaft slewing area device is characterised in that, when switch knob moves to on-position, be inserted in the bottom that two banking pins of going up the middle body of connecting rods stop lock bolt, and restriction goes up the motion of connecting rod, thus the rotation of the main shaft that matches with last connecting rod and lower link of restriction.Therefore can improve the reliability and the durability of switching device.
Describe the utility model with reference to the accompanying drawings in detail.In the accompanying drawing:
Fig. 1 is the perspective view of conventional electric circuit breakers.
Fig. 2 A, 2B and 2C are the vertical sectional view of describing the major part of the switching device in the conventional electric circuit breakers respectively, wherein:
Fig. 2 A is the vertical sectional view that the on-state of conventional electric circuit breakers is shown;
Fig. 2 B is the vertical sectional view that the off-state of conventional electric circuit breakers is shown;
Fig. 2 C is the vertical sectional view of passing through manually-operated closed condition that conventional electric circuit breakers is shown.
Fig. 3 A, 3B and 3C are the vertical sectional view of describing the major part of the switching device in the circuit-breaker of the present utility model respectively, wherein:
Fig. 3 A is the vertical sectional view that the on-state of circuit-breaker of the present utility model is shown;
Fig. 3 B is the vertical sectional view that the off-state of circuit-breaker of the present utility model is shown;
Fig. 3 C is the vertical sectional view of passing through manually-operated closed condition that circuit-breaker of the present utility model is shown.
Describe the device that in circuit-breaker, limits the main shaft slewing area according to the utility model with reference to the accompanying drawings in detail.
Fig. 3 A, 3B and 3C are the vertical sectional view that illustrates respectively according to the major part of the switching device in the circuit-breaker of the present utility model.The code name that uses in these figure is identical with the code name that identical structural detail of the prior art uses.
Shown in Fig. 3 A-3C, the switching device according in the circuit-breaker of the present utility model comprises: be fixed on the side plate 30 on the main body (not shown); Lever 20, the top of described lever 20 is connected with switch knob 10, and the bottom of described lever 20 connects the bottom rotation axis 21 of side plate 30 with rotary way, and is center of rotation with rotation axis 21; Lock bolt 40 rotates around rotation axis 41, and a side of lock bolt 40 is with a side of rotary way connection side plate 30, and the opposite side of lock bolt 40 connects switch knob 10 and main spring (not shown); Opposite side at side plate 30 is provided with lock bolt clamper 50, is used for clamping lock bolt 40, avoids it to rotate, and is connected with the secondary spring (not shown) in the bottom of clamper 50; Pawl 60 comprises extension, when the electric current of load one side is undesired, under the disconnecting apparatus effect, pawl 60 rotates around rotation axis 61, and then extension is used for promoting the top of lock bolt clamper 50, thereby the lock bolt 40 by clamper 50 clampings is rotated; The a pair of connecting rod 70 of going up connects the both sides of lock bolt 40 respectively with rotary way, and to go up connecting rod 70 be center of rotation with the rotation axis 42 of lock bolt 40 central extensions; Banking pin 72 passes two mid portions of going up connecting rod 70 and fixes, and banking pin 72 is by the slewing area of the limit rotation main shaft 90 of restriction lock bolt 40; A pair of lower link 80 connects the bottom of going up connecting rod 70, and is center of rotation with rotation axis 71; Plate-like main shaft 90, along with the rotation of console switch handle 10 or pawl 60,, plate-like main shaft 90 is rotated by the routing motion of last connecting rod 70 and lower link 80, rotation axis 91 stretches out at the middle part of main shaft 90, is fixed on to the lower eccentric of lower link 80 both sides of main shaft 90; Movable contactor 100 is along with main shaft 90 rotates, and is switched on or switched off electric current, and the middle body of movable contactor 100 is fixed on the rotation axis 91 of main shaft 90, is provided with contact point 101,102 at the two ends of movable contactor 100; And fixed contact 110,111, contact with the contact point 101,102 of movable contactor 100 or separate.
Banking pin 72 passes the middle body of connecting rod 70 and installs.When circuit-breaker was connected by switch knob 10, the bottom of lock bolt 40 was limited pin 72 and stops, has limited the motion of last connecting rod 70 thus.Therefore also limited the rotation of the main shaft 90 that cooperates with last connecting rod 70.
The running of the device of restriction main shaft slewing area in circuit-breaker is described below.
When fortuitous event occurring according to circuit-breaker of the present utility model or circuit, electric current is cut off rapidly, and circuit and jockey are not damaged, and prevents that fire from taking place.The disconnection running of circuit-breaker is with of the prior art identical, so do not give unnecessary details.
In addition, the execution of the disconnection reset operation of circuit-breaker, and the execution of the making operation of circuit-breaker, identical with the operating principle of aforementioned conventional technology, therefore be not described in detail.Describe banking pin 72 runnings below in detail.
Fig. 3 B has described circuit-breaker and has been in off-state.Fig. 3 C has described circuit-breaker and has been in closed condition.Shown in Fig. 3 B, when circuit-breaker under off-state, switch knob 10 is moved right, circuit-breaker resets, state then makes switch knob 10 be moved to the left shown in Fig. 3 C.As a result, as shown in Figure 3A, the contact point 101,102 of movable contactor 100 contacts fixed contact 110,111 respectively, so electric current is connected (on-state).
Shown in Fig. 3 C, to connect down in off position in order to make circuit-breaker, switch knob 10 does not need to move to reset position.Be about to switch knob 10 and directly be moved to the left, also promptly move (on-state) towards on-position, as shown in Figure 3A, so circuit is connected.
As mentioned above, under off-state, through the connection circuit-breaker that resetting, perhaps descend the connection circuit-breaker in off position, by the lever 20 that is connected with switch knob 10, and the routing motion that comprises the linkage of main spring (not shown), last connecting rod 70 and lower link 80, as prior art, main shaft 90 is rotated, therefore this process is no longer described.
When circuit-breaker was connected, in order by opening operation circuit-breaker to be disconnected under the sort circuit on-state, the slewing area of main shaft 90 should limit.In according to circuit-breaker of the present utility model, shown in Fig. 3 A, 3B, 3C, when switch knob 10 moves to on-position, a pair of connecting rod 70 of going up is rotated.The banking pin 72 that connecting rod 70 settings are passed in the lower part of lock bolt 40 stops that the motion of connecting rod 70 is gone up in restriction thus.
Consequently, the main shaft 90 that cooperates with the linkage that comprises connecting rod 70 and lower link 80 no longer rotates.Therefore, the slewing area of main shaft 90 is limited, and in the case, circuit-breaker is carried out disconnected or shutoff operation.
Here, the active force that lock bolt 40 applies does not concentrate on in the connecting rod 70 one, but simultaneously active force is acted on each on connecting rod 70.
As mentioned above, in device according to the restriction main shaft slewing area in the circuit-breaker of the present utility model, active force is not concentrated to act on and is fixed on two banking pins of going up in the connecting rod 70 72, but act on the middle part of connecting rod 70, so that opening operation, it is different from prior art, therefore, has improved switching device reliability of operation and durability.
Under the situation of not leaving basic design of the present utility model, the utility model can have various ways, it is also understood that the embodiment that describes in detail above, is not to be to restriction of the present utility model.Design of the present utility model and scope are included in claims, therefore anyly are included in variation in claims or change or equivalent and all belong to the claimed scope of the utility model.
Claims (1)
1. device that is used in the slewing area of circuit-breaker restriction main shaft, in circuit-breaker, by the manual operation of switch knob or the opening operation of disconnecting apparatus, lock bolt is rotated, and make last connecting rod that is connected rotationally with the both sides of locking a door and the lower link routing motion that is connected rotationally with last connecting rod, thereby main shaft is rotated
The device of described restriction main shaft slewing area is characterised in that, when moving to on-position, switch knob stops that the banking pin of link motion in lock bolt bottom, the restriction is inserted in the middle body of connecting rod on two, limit the rotation of the main shaft that matches with linkage thus, described linkage comprises connecting rod and lower link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98251822 CN2359795Y (en) | 1997-12-27 | 1998-12-22 | Device for limitting main spindle rotating range in circuit breaker |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR41580/1997 | 1997-12-27 | ||
| CN 98251822 CN2359795Y (en) | 1997-12-27 | 1998-12-22 | Device for limitting main spindle rotating range in circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2359795Y true CN2359795Y (en) | 2000-01-19 |
Family
ID=33995654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98251822 Expired - Lifetime CN2359795Y (en) | 1997-12-27 | 1998-12-22 | Device for limitting main spindle rotating range in circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2359795Y (en) |
-
1998
- 1998-12-22 CN CN 98251822 patent/CN2359795Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |