CN211555781U - Multifunctional permanent magnet operating mechanism for vacuum circuit breaker - Google Patents

Abstract

The utility model discloses a multifunctional permanent magnet operating mechanism for a matched vacuum circuit breaker, which comprises a mechanism bottom plate, a static iron core inner ring, a static iron core outer ring, a permanent magnet, a movable iron core, a mechanism shaft, an S coil and a guide pin; a mechanism shaft is arranged on the mechanism bottom plate, and a static iron core inner ring and a static iron core outer ring are sequentially sleeved on the mechanism shaft from inside to outside; the permanent magnet is embedded between the inner ring of the static iron core and the outer ring of the static iron core; the S coil is arranged on the outer wall of the inner ring of the static iron core; the movable iron core is arranged above the static iron core inner ring and the static iron core outer ring; the two ends of the guide pin are respectively inserted into the static iron core outer ring and the movable iron core, the movable iron core is fixed in the separation and combination process, the functions of the permanent magnet mechanism are increased by designing the double-guide function of the guide pin guide plate, displaying the mechanism state, buffering the mechanism and limiting the mechanism, the design attached to the original vacuum circuit breaker is concentrated on the permanent magnet operating mechanism, the design parts of the vacuum circuit breaker are reduced, the structure is simplified, and the processing and manufacturing cost is greatly saved.

Description

Multifunctional permanent magnet operating mechanism for vacuum circuit breaker

Technical Field

The utility model relates to a join in marriage the vacuum circuit breaker device field, especially relate to a join in marriage vacuum circuit breaker with multi-functional permanent magnetism operating mechanism.

Background

In order to ensure safe operation of the power system, medium and high voltage circuit breakers used for control and protection in the system must be capable of breaking rated current and short circuit current, closing short-time withstand current, and opening and closing various no-load and load circuits. Compared with an oil circuit breaker, a compressed air circuit breaker and an SF6 circuit breaker, the vacuum circuit breaker has absolute advantages in the middle and high voltage fields. The action of the vacuum circuit breaker is completed by an operating mechanism. Therefore, the operating mechanism directly determines the working performance and reliability of the vacuum circuit breaker.

The traditional operating mechanism comprises a spring operating mechanism and an electromagnetic operating mechanism, wherein the spring operating mechanism has the advantages that a high-power supply is not needed, and the spring operating mechanism has the defects of complex structure, more parts, high cost and difficult guarantee of reliability. The electromagnetic operating mechanism has a simple structure, but has a heavy volume, and the closing coil consumes a large amount of power. In recent years, along with the development of power electronic technology, on the basis of using the advantages and disadvantages of the above two operating mechanisms for reference, a novel operating mechanism, namely a permanent magnet operating mechanism, is developed, a brand new working principle and structure are adopted, a main moving part only has one mechanism shaft during working, the opening and closing operation of a vacuum circuit breaker is realized through the movement of the mechanism shaft, a mechanical unlocking and locking device is not needed, the fault is less, the reliability is higher, the service life is long, and meanwhile, the synchronous control is realized through the opening and closing phase position, so that the impact of overvoltage and inrush current on a power system is reduced.

The vacuum circuit breaker in the electric power system is furnished with the permanent magnetism operating mechanism at present and is had: monostable permanent magnet mechanisms and bistable permanent magnet mechanisms. The monostable permanent magnetic mechanism comprises a single coil and a double coil, wherein the single coil only comprises one coil and is a starting closing coil, and the double coil comprises two coils, one closing coil and the other holding coil. The bistable permanent magnet mechanism has two coils, one closing coil and the other opening coil. The two permanent magnetic mechanisms basically meet the switching-on and switching-off accuracy and reliability of the vacuum circuit breaker, and ensure the safe and reliable operation of the electric power system. Along with the continuous improvement of electric power system and the improvement of degree of automation, put forward higher requirement to vacuum circuit breaker's deciliter: the vacuum circuit breaker is required to be monitored and monitored in real time for reliable and accurate action; in addition, the state display, the buffering and the limiting which are attached to the existing vacuum circuit breaker are all independently designed components, and the vacuum circuit breaker is assembled on a vacuum circuit breaker body after being processed, so that the space is occupied, the design of parts is complex, and the cost and the processing cost are high.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned defect or not enough, the utility model aims to provide a join in marriage vacuum circuit breaker with multi-functional permanent magnetism operating mechanism has effectively solved circuit breaker on-line monitoring problem, simplifies the circuit breaker structure simultaneously.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a multifunctional permanent magnet operating mechanism for a matched vacuum circuit breaker comprises a mechanism bottom plate, a static iron core inner ring, a static iron core outer ring, a permanent magnet, a movable iron core, a mechanism shaft, an S coil and a guide pin; the mechanism bottom plate is provided with a mechanism shaft, the mechanism shaft is sleeved with a static iron core inner ring and a static iron core outer ring from inside to outside in sequence, and the static iron core inner ring and the static iron core outer ring are fixedly arranged on the mechanism bottom plate; the permanent magnet is embedded between the static iron core inner ring and the static iron core outer ring; the S coil is arranged on the outer wall of the inner ring of the static iron core; the movable iron core is arranged above the static iron core inner ring and the static iron core outer ring and is fixedly arranged at the top end of the mechanism shaft; and two ends of the guide pin are respectively inserted into the static iron core outer ring and the movable iron core to fix the movable iron core in the opening and closing process.

A guide sleeve is arranged in the inner ring of the static iron core and sleeved on the mechanism shaft; the static iron core inner ring and the static iron core outer ring are fixed on the mechanism bottom plate through first inner hexagon bolts.

The S coil comprises a mechanism coil and a measuring coil, and the mechanism coil and the measuring coil are wound on the coil framework, wherein the mechanism coil is used for opening and closing operations; the measuring coil is used for monitoring the motion state in the opening and closing action process on line.

And a special-shaped dustproof cover is arranged outside the outer ring of the static iron core, and a state display window is arranged on the special-shaped dustproof cover.

The special-shaped dust cover is provided with a guide groove, the top end face of the movable iron core is fixedly provided with a guide plate, and the guide plate is clamped in the guide groove to fix the movable iron core in the opening and closing process.

And a buffering and limiting unit with buffering and limiting functions is arranged below the mechanism bottom plate.

The buffer limiting unit comprises a buffer plate structure sleeved on the mechanism shaft, and a limiting plate is arranged outside the buffer plate structure; the tail end of the mechanism shaft is provided with a limiting block matched with the limiting plate, and a gap is arranged between the limiting plate and the limiting block.

The buffer plate structure comprises a plurality of first buffer plates and a plurality of second buffer plates, the first buffer plates and the second buffer plates are sleeved on the mechanism shaft, buffer cushions are installed among the first buffer plates, and the first buffer plates and the second buffer plates are fixed on the lower end face of the mechanism bottom plate through second hexagon socket head cap bolts.

The limiting plate is fixed on the lower end face of the mechanism bottom plate through a third inner hexagon bolt; the limiting block is fixed at the end part of the mechanism shaft through an outer hexagon bolt.

The guide pin is made of 0Cr18Ni 9.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a join in marriage vacuum circuit breaker with multi-functional permanent magnetism operating mechanism through the application of S coil, carries out real-time effectual monitoring to vacuum circuit breaker in addition microelectronic technology, thereby uses computer technology, the intelligent deciliter action of accurate control permanent magnetism mechanism of synchronous phase selection technique again, reduces overvoltage and the impact of inrush current to electric power system. In addition, the double-guide function of the guide pin guide plate, the mechanism state display, the mechanism buffering and the mechanism limiting are designed, so that the function of the permanent magnetic mechanism is increased, the design attached to the original vacuum circuit breaker is concentrated on the permanent magnetic operating mechanism, the design parts of the vacuum circuit breaker are reduced, the structure is simplified, and the processing and manufacturing cost is greatly saved.

Drawings

FIG. 1 is a schematic structural view of the multifunctional permanent magnet operating mechanism for a vacuum circuit breaker of the present invention;

FIG. 2 is a sectional view of the multifunctional permanent magnet operating mechanism for the vacuum circuit breaker of the present invention;

FIG. 3 is a schematic view of the installation structure of the guide plate of the present invention;

FIG. 4 is a schematic view of the state display structure of the present invention;

FIG. 5 is a sectional view of the structure of the buffering and limiting unit of the present invention;

FIG. 6 is a schematic view of the buffering and limiting unit of the present invention;

fig. 7 is a schematic diagram of the structure of the limiting plate of the present invention;

fig. 8 is a schematic structural diagram of the special-shaped dust cover of the present invention.

In the figure, 1-movable iron core; 2, a special-shaped dust cover; 3, inner rings of static iron cores; 4-static iron core outer ring; 5-mechanism shaft; 6-mechanism bottom plate; 7, a guide sleeve; 8-fourth hexagon socket screw; 9-a permanent magnet; 10-a guide surface; 11 — status display window; 12-a guide groove; 13-a first hexagon socket screw; 14-a guide pin; 16-a cushion pad; 17-a limiting plate; 18-a limiting block; 20-outer hexagon bolt; 23-third hexagon socket head cap screw; 24 — a first buffer plate; 25-a second buffer plate; 26-mechanism coil; 27-measuring coil, 28-bobbin; 29-second hexagon socket screw; 30-cross recessed pan head screw; 31-a guide plate; 32-closing indication; 33-brake-off indication; 34-fifth hexagon socket screw.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

The utility model provides a join in marriage vacuum circuit breaker with multi-functional permanent magnetism operating mechanism, with vacuum circuit breaker perfect adaptation, not only realized vacuum circuit breaker deciliter operating function, satisfied the direction of permanent magnetism operating mechanism, vacuum circuit breaker's state demonstration, separating brake spacing and buffering moreover. The present invention will be described in further detail with reference to the accompanying drawings, wherein the described embodiments are only some, but not all, and all other embodiments obtained by others skilled in the art without any inventive design fall within the scope of the present invention.

As shown in fig. 1 and 2, the multifunctional permanent magnet operating mechanism for the vacuum circuit breaker of the present invention comprises a mechanism bottom plate 6, a static iron core inner ring 3, a static iron core outer ring 4, a permanent magnet 9, a movable iron core 1, a mechanism shaft 5, an S coil and a guide pin 14; the mechanism bottom plate 6 is provided with a mechanism shaft 5, the mechanism shaft 5 is sleeved with a static iron core inner ring 3 and a static iron core outer ring 4 from inside to outside in sequence, and the static iron core inner ring 3 and the static iron core outer ring 4 are fixedly arranged on the mechanism bottom plate 6; the permanent magnet 9 is embedded between the static iron core inner ring 3 and the static iron core outer ring 4, and the uniform gap is ensured; the S coil is arranged on the outer wall of the inner ring 3 of the static iron core; the movable iron core 1 is arranged above the static iron core inner ring 3 and the static iron core outer ring 4 and is fixedly arranged at the top end of the mechanism shaft 5; and two ends of the guide pin 14 are respectively inserted into the static iron core outer ring 4 and the movable iron core 1 to fix the movable iron core 1 in the opening and closing process. Specifically, the mechanism shaft 5 is fixedly connected with the movable iron core 1 through a fourth hexagon socket head cap screw 8, the guide pin 14 is inserted into the static iron core outer ring 4, the movable iron core 1 and the mechanism shaft 5 are inserted into a hole in the middle of the static iron core inner ring 4, and extend out of the mechanism bottom plate 6 after passing through the guide sleeve 7, so that the movable iron core and the static iron core of the permanent magnet mechanism are combined together.

Preferably, a guide sleeve 7 is arranged in the static iron core inner ring 3, and the guide sleeve 7 is sleeved on the mechanism shaft 5; the static iron core inner ring 3 and the static iron core outer ring 4 are fixed on the mechanism bottom plate 6 through first inner hexagon bolts 13M5X 20. The guide sleeve 7 is firstly embedded in a circular groove of the mechanism bottom plate 6, and the static iron core inner ring 3 and the static iron core outer ring 4 are fixed on the mechanism bottom plate 6 through a first hexagon socket head cap screw 13M5X 20.

Specifically, the S coil includes a mechanism coil 26 and a measurement coil 27, and the mechanism coil 26 and the measurement coil 27 are wound on a coil bobbin 28, wherein the mechanism coil 26 is used for opening and closing operations; the measuring coil 27 is used for monitoring the motion state in the opening and closing action process on line. When the S coil (the mechanism coil 26 and the measuring coil 27) is sleeved outside the inner ring of the static iron core, the S coil is encapsulated and solidified by epoxy resin encapsulation glue to prevent looseness.

Further, a special-shaped dust cover 2 is installed outside the static iron core outer ring 4, and a state display window is formed in the special-shaped dust cover 2. When the special-shaped dust cover is installed, the special-shaped dust cover 2 is fixed on the outer ring 4 of the static iron core by the cross pan head screw 30M4X10, and the guide display window of the special-shaped dust cover 2 is on the same side with the outgoing line of the S coil.

As shown in fig. 3, it is further preferable that the special-shaped dust cover 2 is provided with a guide groove 12, a guide plate 31 is fixedly mounted on the top end surface of the movable iron core 1, and the guide plate 31 is clamped in the guide groove 12 to fix the movable iron core 1 in the opening and closing process. The mechanism is double-guided by the guide pin 14 and the guide plate 31. Two ends of the guide pin 14 are respectively inserted into round holes on the outer ring 4 of the static iron core and the side surface of the movable iron core 1, so that the movable iron core 1 is ensured not to rotate in the opening and closing process of the permanent magnet operating mechanism; the guide plate 31 is fixed on the bottom end face of the rotating iron core 1 by a fifth hexagon socket head cap bolt 34M6X15, and the guide groove 12 on the special-shaped dust cover 2 is matched with the side face, so that the guide plate 31 does not rotate in the opening and closing process, and the rotation of the rotating iron core 1 is limited. The purpose of both guides is to prevent the movable core 1 from rotating.

As shown in fig. 4, the state display of the mechanism is composed of a closing indication 32 and an opening indication 33, the closing indication 32 and the opening indication 33 are made of non-adhesive materials and are adhered to the front surface of the guide plate 31, and when the permanent magnet operating mechanism is in an opening position and a closing position, the opening and closing state of the permanent magnet mechanism can be observed through a rectangular display window on the special-shaped dust cover 2, so that the opening and closing state of the vacuum circuit breaker equipped with the permanent magnet operating mechanism can be indirectly judged.

As shown in fig. 5 and 6, a buffering and limiting unit with buffering and limiting functions is mounted below the mechanism bottom plate 6. The buffer limiting unit comprises a buffer plate structure sleeved on the mechanism shaft 5, and a limiting plate 17 is arranged outside the buffer plate structure; the tail end of the mechanism shaft 5 is provided with a limiting block 18 matched with the limiting plate 17, and a gap is arranged between the limiting plate 17 and the limiting block 18. The limiting plate 17 is fixed on the lower end face of the mechanism bottom plate 6 through a third inner hexagon bolt 23; the stopper 18 is fixed to the end of the mechanism shaft 5 by an outer hexagonal bolt 20M12X 25.

The buffer plate structure comprises a plurality of first buffer plates 24 and second buffer plates 25 which are sleeved on the mechanism shaft 5, buffer pads 16 are arranged between the first buffer plates 24, and the first buffer plates 24 and the second buffer plates 25 are fixed on the lower end face of the mechanism bottom plate 6 through second hexagon socket head cap screws 29. The buffer pad 16, the first buffer plate 24 and the second buffer plate 25 with the buffer function are fixed on the mechanism bottom plate 6 through a second hexagon socket head cap screw 29M4X20, the first buffer plate 24 and the buffer pad 16 are alternately overlapped together, and when the permanent magnet operating mechanism is opened, the limit block 18 smashes the second buffer plate 25 to play a role in opening and buffering.

As shown in fig. 7, the position-limiting plate 17 having the position-limiting function is fixed to the mechanism base plate 6 by a third hexagon socket head cap screw 23M6X30, and the position-limiting block 18 is fixed to the end of the mechanism shaft 5 by a hexagon socket head cap screw 20M12X 25. When the permanent magnet operating mechanism receives a brake opening instruction, the movable iron core 1 drives the mechanism shaft 5 to move upwards, and when the requirement of the total stroke of the mechanism is met, the limiting block 18 can hit the plane of the limiting plate 17, the mechanism shaft 5 and the movable iron core 1 stop moving, and the purpose of brake opening limiting is achieved.

As shown in fig. 8, the special-shaped dust cover 2 is a combined dust cover integrating three functions of protection, guidance and status display by adding a guide surface 10 and a status display window 11 on the original basis and injection molding.

The guide pin 14 of the present invention is made of 0Cr18Ni9, and is close to the guide pin by rare earth metal without any suction force. The material of the guide plate 31 is aluminum alloy 1060. The material of the closing indication 32 and the opening indication 33 is non-stick glue. The shaped dust cover 2 material is polyamide resin 1010.

The utility model discloses a theory of operation and working process do:

when the permanent magnet mechanism and the breaker are in the opening position and the permanent magnet operating mechanism is in the opening state and needs to be closed, closing current is supplied to a mechanism coil 26, when magnetic field force induced by the closing current and permanent magnetic field force generated by the permanent magnet 9 are in the same direction and reach a critical value, the movable iron core 1 starts to move downwards until being attracted with the inner and outer rings of the static iron core, at the moment, the closing current disappears, and the movable iron core is kept at the closing position by the attraction of the permanent magnet. Similarly, when the permanent magnetic mechanism and the breaker are located at the closing position and need to be opened, the mechanism coil 26 is supplied with reverse opening current, when the magnetic field force induced by the opening current is greater than the permanent magnetic field force generated by the permanent magnet 9, the movable iron core 1 starts to move upwards, the opening current is cut off, and the contact pressure spring and the opening spring matched with the breaker release energy to push the movable iron core 1 to continue to move upwards until the opening is in place. The measuring coil 27 is mainly used for monitoring the motion state of the permanent magnetic mechanism in the opening and closing action process on line, when the mechanism coil 26 passes the opening and closing current, an electric signal is generated in the measuring coil 27, the electric signal is sent to a corresponding acquisition processing system and converted into a waveform, and the key position point of the vacuum circuit breaker is found from the waveform: the on-off action of the vacuum circuit breaker is controlled by analyzing data, so that the purpose of on-line monitoring is achieved.

It should be apparent to those skilled in the art that the above embodiments are only preferred embodiments of the present invention, and therefore, the modifications and changes that can be made by those skilled in the art to some parts of the present invention still embody the principles of the present invention, and the objects of the present invention are achieved, all falling within the scope of the present invention.

Claims (10)

1. A multifunctional permanent magnet operating mechanism for a matched vacuum circuit breaker is characterized by comprising a mechanism bottom plate (6), a static iron core inner ring (3), a static iron core outer ring (4), a permanent magnet (9), a movable iron core (1), a mechanism shaft (5), an S coil and a guide pin (14); the mechanism comprises a mechanism bottom plate (6), a mechanism shaft (5) and a static iron core inner ring (3) and a static iron core outer ring (4), wherein the mechanism shaft (5) is installed on the mechanism bottom plate (6), the static iron core inner ring (3) and the static iron core outer ring (4) are sleeved on the mechanism shaft (5) from inside to outside in sequence, and the static iron core inner ring (3) and the static iron core outer ring (4) are fixedly installed on the; the permanent magnet (9) is embedded between the static iron core inner ring (3) and the static iron core outer ring (4); the S coil is arranged on the outer wall of the inner ring (3) of the static iron core; the movable iron core (1) is arranged above the static iron core inner ring (3) and the static iron core outer ring (4) and is fixedly arranged at the top end of the mechanism shaft (5); and two ends of the guide pin (14) are respectively inserted into the static iron core outer ring (4) and the movable iron core (1) to fix the movable iron core (1) in the opening and closing process.

2. The multifunctional permanent magnet operating mechanism for the vacuum circuit breaker according to claim 1, wherein a guide sleeve (7) is arranged in the static iron core inner ring (3), and the guide sleeve (7) is sleeved on the mechanism shaft (5); the static iron core inner ring (3) and the static iron core outer ring (4) are fixed on the mechanism bottom plate (6) through a first inner hexagon bolt (13).

3. The multifunctional permanent magnet operating mechanism for the vacuum circuit breaker according to claim 1 or 2, wherein the S coil comprises a mechanism coil (26) and a measuring coil (27), and the mechanism coil (26) and the measuring coil (27) are wound on a coil framework (28), wherein the mechanism coil (26) is used for switching operation; the measuring coil (27) is used for monitoring the motion state in the opening and closing action process on line.

4. The multifunctional permanent magnet operating mechanism for the vacuum circuit breaker according to claim 1 or 2, wherein a special-shaped dust cover (2) is installed outside the static iron core outer ring (4), and a status display window (11) is opened on the special-shaped dust cover (2).

5. The multifunctional permanent magnet operating mechanism for the vacuum circuit breaker according to claim 4, wherein the special-shaped dust cover (2) is provided with a guide groove (12), a guide plate (31) is fixedly installed on the top end face of the movable iron core (1), and the guide plate (31) is clamped in the guide groove (12) to fix the movable iron core (1) in the opening and closing process.

6. The multifunctional permanent magnet operating mechanism for the vacuum circuit breaker according to claim 1, wherein a buffering and limiting unit with buffering and limiting functions is installed below the mechanism bottom plate (6).

7. The multifunctional permanent magnet operating mechanism for the vacuum circuit breaker according to claim 6, wherein the buffering and limiting unit comprises a buffering plate structure sleeved on the mechanism shaft (5), and a limiting plate (17) is installed outside the buffering plate structure; the tail end of the mechanism shaft (5) is provided with a limiting block (18) matched with the limiting plate (17), and a gap is arranged between the limiting plate (17) and the limiting block (18).

8. The multifunctional permanent magnet operating mechanism for the vacuum circuit breaker according to claim 7, wherein the buffer plate structure comprises a plurality of first buffer plates (24) and second buffer plates (25) sleeved on the mechanism shaft (5), a buffer pad (16) is installed between the plurality of first buffer plates (24), and the first buffer plates (24) and the second buffer plates (25) are fixed on the lower end face of the mechanism bottom plate (6) through second hexagon socket head bolts (29).

9. The multifunctional permanent magnet operating mechanism for the vacuum circuit breaker according to claim 7, wherein the limiting plate (17) is fixed on the lower end face of the mechanism bottom plate (6) through a third hexagon socket head cap screw (23); the limiting block (18) is fixed at the end part of the mechanism shaft (5) through an outer hexagon bolt (20).

10. The multifunctional permanent magnet operating mechanism for the vacuum circuit breaker according to claim 7, wherein the guide pin (14) is made of 0Cr18Ni 9.

Images