CN217881306U

CN217881306U - High-voltage vacuum circuit breaker with straight-pull electromagnetic control operating mechanism

Info

Publication number: CN217881306U
Application number: CN202222047223.6U
Authority: CN
Inventors: 李志刚; 李钒歌; 李佳芳; 李志勇; 马二雨
Original assignee: Baoding Semeureka Electric Power Technology Co ltd
Current assignee: Baoding Semeureka Electric Power Technology Co ltd
Priority date: 2022-08-04
Filing date: 2022-08-04
Publication date: 2022-11-22
Anticipated expiration: 2032-08-04

Abstract

The utility model discloses a take straight-pull electromagnetic control operating mechanism's high pressure vacuum circuit breaker, including circuit breaker body and terminal box, this internal straight-pull electromagnetic control operating mechanism that is provided with of circuit breaker, straight-pull electromagnetic control operating mechanism includes the static control unit, the separating brake spring with move the control unit, the static control unit is fixed at the circuit breaker originally internally, the insulating pull rod that seals in the vacuum utmost point post admittedly passes the static control unit and is connected with the control unit of moving, the cover is equipped with the separating brake spring on the insulating pull rod between control unit and the static control unit, the both ends of separating brake spring contact with the control unit of moving respectively and static control unit, be provided with static magnet and move the magnet in the static control unit and the control unit of moving respectively, static magnet and move the magnet and all adopt half hard magnetic material. The high-voltage vacuum circuit breaker with the straight-pull electromagnetic control operating mechanism with the structure realizes the quick opening and closing of the circuit breaker, and improves the performance and quality of the circuit breaker.

Description

High-voltage vacuum circuit breaker with straight-pull electromagnetic control operating mechanism

Technical Field

The utility model belongs to the technical field of the circuit breaker technique and specifically relates to a take straight-pull formula electromagnetic control operating mechanism's high-pressure vacuum circuit breaker is related to.

Background

The traditional operating mechanism of the 10kV circuit breaker is divided into a spring operating mechanism and a permanent magnet operating mechanism. The spring operating mechanism has the disadvantages of relatively backward technology, complex structure, more mechanical parts, higher requirement on machining precision, complex manufacturing process, easy occurrence of fault phenomena such as mechanism clamping and the like, and short service life of products. The opening time is about 25mS, the closing time is about 40mS, the power grid frequency is 50Hz, and the period is 20mS, so that the spring-operated mechanism type circuit breaker cannot be accurately controlled.

After the permanent magnet operating mechanism is switched on, a permanent magnet is used as a device for keeping the switching on, for example, a patent with the application number of 201710559859.X discloses a permanent magnet used by the permanent magnet operating mechanism for a high-voltage vacuum circuit breaker based on the electromagnetic repulsion principle, the control adopts charging capacitor discharge excitation, the operating power is high, the failure rate of a driving circuit is high, the inherent permanent magnet magnetic force needs to be overcome when the switching on operation is started, the switching on and switching off speed is limited, the overall performance of the circuit breaker is improved, and the difficulty is high. The traditional intelligent circuit breakers with the spring operating mechanisms and the permanent magnet operating mechanisms cannot meet the requirement of the multi-level difference matching of line protection, and branch line faults are easily caused to cause tripping of the substation outlet switch protection, large-area power failure is caused, and override tripping accidents are caused. Meanwhile, in the prior art, an electromagnet is adopted for control, for example, a patent with the application number of 201810196113.1 discloses a driving device of a novel high-voltage vacuum circuit breaker, a magnetic material with fast demagnetization is adopted, and a power supply is required to be supplied for a switching-on state all the time, so that the control is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a take high-pressure vacuum circuit breaker of straight-pull electromagnetic control operating device realizes the quick divide-shut brake of circuit breaker, promotes the performance and the quality of circuit breaker.

In order to achieve the above object, the utility model provides a take vertical pulling formula electromagnetic control operating mechanism's high-pressure vacuum circuit breaker, including circuit breaker body and terminal box, be provided with three solid vacuum utmost point post that seals on the circuit breaker body, this internal vertical pulling formula electromagnetic control operating mechanism who sets up side by side that is provided with of circuit breaker, vertical pulling formula electromagnetic control operating mechanism includes static control unit, separating brake spring and power control unit, power control unit with static control unit sets up relatively from top to bottom, static control unit fixes at this internally at the circuit breaker, the insulating pull rod that seals in the vacuum utmost point post admittedly passes static control unit and with power control unit is connected, power control unit with the cover is equipped with separating brake spring on the insulating pull rod between the static control unit, separating brake spring's both ends respectively with power control unit with static control unit contacts, static control unit with be provided with static magnet and dynamic magnet in the dynamic control unit respectively, static magnet with dynamic magnet all adopts half-hard magnetic material.

Preferably, a lower limit edge is arranged on the circumferential side of one end of the movable magnet, a lower accommodating groove is formed in the end surface of the other end of the movable magnet, an upper limit edge is arranged on the circumferential side of one end of the static magnet, an upper accommodating groove is formed in the end surface of the other end of the static magnet, and two ends of the opening spring are respectively arranged in the lower accommodating groove and the upper accommodating groove.

Preferably, the static control unit comprises a fixed seat, a static magnet and a static control coil, the static control coil is sleeved outside the static magnet and connected with a wiring terminal of the junction box, through holes are formed in the middle parts of the static magnet and the fixed seat, the static magnet is arranged in the fixed seat, and the fixed seat is fixed in the circuit breaker body through bolts.

Preferably, the power control unit comprises a fixed seat, a movable magnet and a power control coil, the power control coil is sleeved outside the movable magnet and connected with a wiring terminal of the junction box, mounting through holes are formed in the middle parts of the movable magnet and the fixed seat, the movable magnet is mounted in the fixed seat, and the fixed seat is fixedly connected with the tail end of the insulating pull rod.

Preferably, the fixing base comprises a fixing plate and a fixing sleeve, a limiting groove is formed in the inner side of one end of the fixing sleeve and fixedly connected with the fixing plate through a bolt, and a containing groove used for containing a coil is formed in the inner side of the other end of the fixing sleeve.

Therefore, the utility model adopts the above structure a take high-pressure vacuum circuit breaker of straight pull formula solenoid electric operating mechanism has following beneficial effect:

(1) The static magnet and the moving magnet are both made of semi-hard magnetic materials, and are easy to magnetize under the action of a magnetic field by utilizing the magnetic characteristics of the semi-hard magnetic materials, and are not easy to demagnetize under the action of no magnetic field, so that the switch-on and switch-off keeping state is realized; under the action of a demagnetizing magnetic field, the switch is easy to demagnetize, and under the action of a switching-off spring, switching-off is realized.

(2) The three phases A, B and C of the high-voltage vacuum circuit breaker are provided with 3 straight-pull electromagnetic control operating mechanisms, the three phases A, B and C are respectively operated to be switched on and off, the switching-off time is less than 10mS, and the switching-off is quick. The total opening time of a high-voltage vacuum circuit breaker with a straight-pull electromagnetic control operation mechanism configuration is =10mS +40mS (controller reaction time is 40 mS) +10mS (margin) =50mS, and the time delay of a substation outlet switch is 300mS. Therefore, the straight-pull electromagnetic control operating mechanism type high-voltage vacuum circuit breaker can really support 5-level differential protection of the line, greatly reduce the fault power failure range of the line and solve the problem of override trip accidents caused by improper matching of the differential.

(3) The switching on and off of the switch has the advantages of no overvoltage, no electric arc, no spark and no interference, and solves the problem that the circuit electrical equipment is damaged by overvoltage such as cutoff overvoltage, restrike passing voltage, bounce overvoltage and the like generated when the traditional vacuum switch is switched on and off.

The technical solution of the present invention is further described in detail by the accompanying drawings and examples.

Drawings

Fig. 1 is a side view of a high-voltage vacuum circuit breaker with a straight-pull electromagnetic control operating mechanism according to the present invention;

fig. 2 is a schematic view of the structure of the magnetostatic body of the present invention;

FIG. 3 is a schematic view of the fixing sleeve of the present invention;

fig. 4 is a front view of the high-voltage vacuum circuit breaker with a straight-pull electromagnetic control operating mechanism.

Reference numerals

1. A circuit breaker body; 2. solid sealing the vacuum pole; 21. an insulating pull rod; 3. a junction box; 4. a fixing plate; 5. fixing a sleeve; 51. a limiting groove; 52. accommodating grooves; 6. a static magnet; 61. through the through hole; 62. an upper limit edge; 63. an upper accommodating groove; 7. a stationary control coil; 8. a brake separating spring; 9. a moving magnet; 10. and a static control coil.

Detailed Description

Examples

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the utility model is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to be referred must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Fig. 1 is the utility model relates to a take vertical pulling formula electromagnetic control operating mechanism's high-pressure vacuum circuit breaker side view, fig. 4 are the utility model discloses a take vertical pulling formula electromagnetic control operating mechanism's high-pressure vacuum circuit breaker front view, as shown in fig. 1 and 4, a take vertical pulling formula electromagnetic control operating mechanism's high-pressure vacuum circuit breaker, including circuit breaker body 1 and terminal box 3, be provided with three solid vacuum terminal post 2 that seals on the circuit breaker body 1, be provided with the vertical pulling formula electromagnetic control operating mechanism that three set up side by side in the circuit breaker body 1, control the divide-shut brake of circuit breaker body A, B, C three-phase respectively.

The straight pull type electromagnetic control operating mechanism comprises a static control unit, a brake separating spring 8 and a power control unit, wherein the power control unit and the static control unit are arranged oppositely up and down. Control the unit and be similar with quiet control unit structure, control the unit and be connected with the tail end of insulating pull rod through the fixing base, quiet control unit passes through the fixing base to be installed inside circuit breaker body 1, and the fixing base includes fixed plate 4 and fixed cover 5, and spacing groove 51 and through bolt and fixed plate 4 fixed connection have been seted up to fixed cover 5 one end inboard, and the holding tank 52 that is used for holding the coil is seted up to fixed cover 5's other end inboard.

The static control coil 7 of the static control unit is sleeved on the outer side of the static magnet 6 and connected with a connecting terminal of the junction box 3 for providing a magnetic field or a degaussing magnetic field for the static magnet, the insulating pull rod 21 passes through the through hole 61 of the static magnet 6, so that the movement of the insulating pull rod 21 does not influence the static magnet 6, an upper limiting edge 62 is arranged on the circumference side of one end of the static magnet 6, an upper accommodating groove 63 is arranged on the end surface of the other end of the static magnet 6, the upper limiting edge 62 is erected in the limiting groove 51 of the fixing sleeve 5, the fixing plate 4 is installed, the static magnet 6 is fixed in the fixing sleeve 5, and the corresponding fixing plate 4 is fixed in the circuit breaker body 1 through bolts. The opening spring sleeve 8 is arranged on the insulating pull rod 21 between the dynamic control unit and the static control unit, and two ends of the opening spring 8 are respectively arranged in the lower accommodating groove and the upper accommodating groove 63.

The difference between the control unit and the static control unit is that a fixed plate 4 for fixing the movable magnet 9 is fixedly connected with the tail end of the insulating pull rod 21 through a bolt, the static magnet and the movable magnet both adopt semi-hard magnetic materials, the semi-hard magnetic materials are magnetic materials between hard magnets and soft magnets, the coercive force is 1-20 kiloamperes/meter, and the hysteresis loop squareness and the squareness ratio are high. Under the action of magnetic field, it is easy to magnetize. When no magnetic field acts, demagnetization is not easy to occur, and the state is convenient to maintain; under the action of a demagnetizing field, the valve is easy to demagnetize, and meanwhile, the quick switching-off is realized under the action of a switching-off spring, and the switching-off time is less than 10mS. The switching on and off of the switch has the advantages of no overvoltage, no electric arc, no spark and no interference, and solves the problem that the circuit electrical equipment is damaged by overvoltage such as cutoff overvoltage, reignition overvoltage, overstroke passing voltage, bounce overvoltage and the like generated when the traditional vacuum switch is switched on and off.

Therefore, the utility model adopts the above structure a take high-pressure vacuum circuit breaker of straight-pull electromagnetic control operating mechanism realizes the quick divide-shut brake of circuit breaker, promotes the performance and the quality of circuit breaker.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: the technical solution of the present invention can still be modified or replaced by other equivalent means, and the modified technical solution can not be separated from the spirit and scope of the technical solution of the present invention.

Claims

1. The utility model provides a take straight-pull electromagnetic control operating mechanism's high-pressure vacuum circuit breaker, includes circuit breaker body and terminal box, be provided with three solid vacuum terminal post that seals on the circuit breaker body, its characterized in that: the circuit breaker is characterized in that three straight pull type electromagnetic control operating mechanisms arranged in parallel are arranged in the circuit breaker body, each straight pull type electromagnetic control operating mechanism comprises a static control unit, a separating brake spring and a power control unit, the power control unit is oppositely arranged above and below the static control unit, the static control unit is fixed in the circuit breaker body, an insulating pull rod in a sealed vacuum pole column penetrates through the static control unit and is connected with the power control unit, the power control unit is sleeved with the separating brake spring on the insulating pull rod between the static control unit, two ends of the separating brake spring are respectively connected with the power control unit and the static control unit in contact, the static control unit is respectively provided with a static magnet and a dynamic magnet in the dynamic control unit, and the static magnet and the dynamic magnet are both made of semi-hard magnetic materials.

2. The high voltage vacuum circuit breaker with a czochralski-type solenoid-operated mechanism as claimed in claim 1, characterized in that: the circumference side of moving magnet one end is provided with down spacing edge, the holding tank has down been seted up to the terminal surface of the moving magnet other end, the circumference side of magnetostatic magnet one end is provided with upper spacing edge, the holding tank has been seted up to the terminal surface of the magnetostatic magnet other end, the both ends of separating brake spring set up respectively under in holding tank and the holding tank.

3. The high voltage vacuum circuit breaker with a czochralski-type solenoid-operated mechanism as claimed in claim 2, characterized in that: the static control unit comprises a fixed seat, a static magnet and a static control coil, the static control coil is sleeved outside the static magnet and connected with a wiring terminal of the junction box, through holes are formed in the middle parts of the static magnet and the fixed seat, the static magnet is arranged in the fixed seat, and the fixed seat is fixed in the circuit breaker body through bolts.

4. The high voltage vacuum circuit breaker with a czochralski-type solenoid-operated mechanism as claimed in claim 2, characterized in that: the power control unit comprises a fixed seat, a movable magnet and a movable control coil, the movable control coil is sleeved outside the movable magnet and connected with a wiring terminal of the junction box, mounting through holes are formed in the middle of the movable magnet and the middle of the fixed seat, the movable magnet is mounted in the fixed seat, and the fixed seat is fixedly connected with the tail end of the insulating pull rod.

5. The high voltage vacuum circuit breaker with a straight pull type solenoid operated mechanism according to claim 3 or 4, characterized in that: the fixing base comprises a fixing plate and a fixing sleeve, wherein a limiting groove is formed in the inner side of one end of the fixing sleeve and is fixedly connected with the fixing plate through a bolt, and a containing groove used for containing a coil is formed in the inner side of the other end of the fixing sleeve.