CN209785830U - Three-phase box type vacuum circuit breaker - Google Patents
Three-phase box type vacuum circuit breaker Download PDFInfo
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- CN209785830U CN209785830U CN201921067552.9U CN201921067552U CN209785830U CN 209785830 U CN209785830 U CN 209785830U CN 201921067552 U CN201921067552 U CN 201921067552U CN 209785830 U CN209785830 U CN 209785830U
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Abstract
the utility model discloses a three-phase box type vacuum circuit breaker, which comprises an insulating frame, wherein a current conducting plate, a vacuum arc extinguish chamber, a contact screw, an over travel spring, an insulating arm, an armature plate, a travel switch, a yoke, a shunt coil, a closing coil, a retaining hook and a controller are arranged in the insulating frame; the insulating arm is transversely arranged, one end of the insulating arm is connected with the bottom of the armature plate, the top of the armature plate is provided with a roller, the yoke is arranged on one side of the armature plate, the shunt coil, the closing coil and the holding hook are arranged on one side of the yoke facing the armature plate, and a U-shaped groove is formed in the part, matched with the roller, of the holding hook. The utility model discloses a vacuum circuit breaker has removed the decompression trip gear, has still taken the separating brake pivot machine hook simultaneously, belongs to one-level tripping device. Therefore, the mechanism is simplified, the number of used parts is small, and the fault phenomena of rejection and separation caused by demagnetization after a permanent magnet of the permanent magnet mechanism circuit breaker is used for a period of time are overcome, so that the permanent magnet mechanism circuit breaker can be compared with the permanent magnet circuit breaker.
Description
Technical Field
the utility model belongs to the technical field of the circuit breaker device, concretely relates to box vacuum circuit breaker of three-phase.
Background
The vacuum circuit breaker is named because the arc extinguishing medium and the insulating medium in the contact gap after arc extinguishing are high vacuum, has the advantages of small volume, light weight, suitability for frequent operation and no need of maintenance for arc extinguishing, and is relatively popularized in power distribution networks. The vacuum circuit breaker is an indoor power distribution device in a 3-10 kV and 50Hz three-phase alternating-current system, can be used for protecting and controlling electrical equipment in industrial and mining enterprises, power plants and transformer substations, is particularly suitable for use places requiring no oil, less maintenance and frequent operation, and can be arranged in a middle cabinet, a double-layer cabinet and a fixed cabinet to be used for controlling and protecting high-voltage electrical equipment.
In the vacuum circuit breaker in the prior art, an electromagnetic operating mechanism has more parts and larger friction resistance, so that more fault points are caused, and the service life of the vacuum circuit breaker is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a box vacuum circuit breaker of three-phase to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a three-phase box type vacuum circuit breaker comprises an insulating frame, wherein a current conducting plate, a vacuum arc-extinguishing chamber, a contact screw, an over travel spring, an insulating arm, an armature plate, a travel switch, a yoke, a shunt coil, a closing coil, a retaining hook and a controller are arranged in the insulating frame;
The upper end of the conducting plate extends out of the insulating frame, the lower end of the conducting plate is connected with the top of the vacuum arc-extinguishing chamber, the bottom of the vacuum arc-extinguishing chamber is connected with the upper part of a contact screw rod, the contact screw rod penetrates through one end of an insulating arm, the contact screw rod is sleeved with an over travel spring, the top of the over travel spring is connected with the top of the contact screw rod, the bottom of the over travel spring is connected with the top of an insulating arm, the insulating arm is transversely arranged, the other end of the insulating arm is connected with the bottom of an armature plate, the travel switch is connected with the bottom of the armature plate in a matching way, the top of the armature plate is provided with a roller, the yoke is arranged on one side of the armature plate, the shunt coil, the closing coil and the holding hook are all arranged on one side of the yoke facing the armature plate, the U-shaped groove is arranged at the part where the holding hook is matched with the roller, and the controller is positioned above the yoke.
preferably, the vacuum arc extinguish chamber comprises a ceramic tube, an upper cover plate, a lower cover plate, a static conducting rod and a dynamic conducting rod, the upper cover plate is arranged at the top of the ceramic tube, the lower cover plate is arranged at the bottom of the ceramic tube, the top of the static conducting rod is connected with the conducting plate, the bottom of the static conducting rod penetrates through the upper cover plate and extends into the ceramic tube, a static contact is arranged at the bottom of the static conducting rod, the top of the dynamic conducting rod penetrates through the lower cover plate and extends into the ceramic tube, a dynamic contact is arranged at the top of the dynamic conducting rod, the bottom of the dynamic conducting rod is connected with a contact screw rod, and the static contact is correspondingly matched with the upper and lower dynamic contacts.
Preferably, the fixed contact and the movable contact are both provided with contact seats, and the contact seats are cup-shaped contact seats provided with spiral grooves.
preferably, a corrugated pipe is sealed between the movable conducting rod and the ceramic pipe.
preferably, shielding covers are arranged around the fixed contact, the movable contact and the corrugated pipe.
Preferably, the static contact and the moving contact are made of CuCr.
Preferably, the ceramic tube is made of alumina electronic ceramic.
preferably, the insulating frame is of a closed box type structure, and the manufacturing material of the insulating frame is dimethyl carbonate.
has the advantages that:
(1) The utility model discloses a three-phase box vacuum circuit breaker, the holding hook design is rolling friction mode, just installs a gyro wheel in armature plate upper end, drives the rotatory certain angle of armature plate by closing a floodgate coil circular telegram actuation, makes the gyro wheel on it roll the U-shaped inslot of holding hook and the auto-lock catch, realizes mechanical holding. The other end of the holding hook is controlled by the shunt coil and the manual brake separating device, so that the holding hook is rotated to be released, and the purpose of brake separating is achieved. The utility model discloses a vacuum circuit breaker has removed the decompression trip gear, has still taken the separating brake pivot machine hook simultaneously, belongs to one-level tripping device. Therefore, the mechanism is simplified, the number of used parts is small, and the fault phenomena of rejection and separation caused by demagnetization after a permanent magnet of the permanent magnet mechanism circuit breaker is used for a period of time are overcome, so that the permanent magnet mechanism circuit breaker can be compared with the permanent magnet circuit breaker.
(2) The utility model discloses a box vacuum circuit breaker of three-phase, vacuum interrupter's sound contact material adopts CuCr50, and it has higher mechanical strength, oxidation resistance, corrosion resistance and electric conductivity. The cup-shaped contact seat with the spiral groove is reasonably designed on the contact structure, when the contact has current, the contact seat can generate a longitudinal magnetic field, and the electromagnetic field is uniformly, reasonably and stably distributed, so that the breaking capacity of the contact is greatly improved.
(3) The utility model discloses a box vacuum circuit breaker of three-phase, insulating frame design becomes to seal box formula structure, can all encapsulate inside it with the part to the insulating properties of circuit breaker has been promoted. The insulating frame is formed by pressing DMC plastic material with high strength, and has high mechanical strength and compressive strength. The circuit breaker with the sealed box body type structure has beautiful appearance and can effectively prevent foreign matters from invading, thereby improving the stability and reliability of closing and opening of the circuit breaker.
Drawings
Fig. 1 is the utility model relates to a box vacuum circuit breaker's of three-phase structure sketch map.
Fig. 2 is a schematic structural diagram of the vacuum interrupter of the present invention.
In the figure: 1-insulating frame, 2-conducting plate, 3-vacuum arc extinguish chamber, 31-ceramic tube, 32-upper cover plate, 33-lower cover plate, 34-static conducting rod, 35-dynamic conducting rod, 36-static contact, 37-dynamic contact, 38-contact seat, 39-corrugated tube, 4-contact screw, 5-insulating arm, 6-armature plate, 7-travel switch, 8-yoke, 9-shunt coil, 10-closing coil, 11-holding hook, 12-controller, 13-roller, 14-U-shaped groove and 15-overtravel spring.
Detailed Description
The embodiments of the present invention will be further explained with reference to the drawings.
As shown in fig. 1-2, a three-phase box-type vacuum circuit breaker includes an insulating frame 1, a conductive plate 2, a vacuum arc-extinguishing chamber 3, a contact screw 4, an over travel spring 15, an insulating arm 5, an armature plate 6, a travel switch 7, a yoke 8, a shunt coil 9, a closing coil 10, a holding hook 11 and a controller 12 are disposed in the insulating frame 1, the conductive plate 2, the vacuum arc-extinguishing chamber 3, the contact screw 4 and the over travel spring 15 are disposed on one side of the insulating frame 1, and the armature plate 6, the travel switch 7, the yoke 8, the shunt coil 9, the closing coil 10, the holding hook 11 and the controller 12 are disposed on the other side of the insulating frame 1;
The upper end of the conducting plate 2 extends out of the insulating frame 1, the lower end of the conducting plate 2 is connected with the top of the vacuum arc-extinguishing chamber 3, the bottom of the vacuum arc-extinguishing chamber 3 is connected with the upper part of the contact screw rod 4, the contact screw rod 4 penetrates through one end of the insulating arm 5, the contact screw rod 4 is sleeved with the overtravel spring 15, the top of the overtravel spring 15 is connected with the top of the contact screw rod 4, the bottom of the overtravel spring 15 is connected with the top of the insulating arm 5, the insulating arm 5 is transversely arranged, the other end of the insulating arm 5 is connected with the bottom of the armature plate 6, the travel switch 7 is connected with the bottom of the armature plate 6 in a matching manner, the top of the armature plate 6 is provided with a roller 13, the yoke 8 is arranged on one side of the armature plate 6, the shunt coil 9, the closing coil 10 and the holding hook 11 are all, the part of the holding hook 11, which is matched with the roller 13, is provided with a U-shaped groove 14, and the controller 12 is positioned above the yoke 8.
The vacuum arc extinguish chamber 3 comprises a ceramic tube 31, an upper cover plate 32, a lower cover plate 33, a static conducting rod 34 and a dynamic conducting rod 35, wherein the upper cover plate 32 is installed at the top of the ceramic tube 31, the lower cover plate 33 is installed at the bottom of the ceramic tube 31, the top of the static conducting rod 34 is connected with a conducting plate 2, the bottom of the static conducting rod 34 penetrates through the upper cover plate 32 and extends into the ceramic tube 31, the bottom of the static conducting rod 34 is provided with a static contact 36, the top of the dynamic conducting rod 35 penetrates through the lower cover plate 33 and extends into the ceramic tube 31, the top of the dynamic conducting rod 35 is provided with a dynamic contact 37, the bottom of the dynamic conducting rod 34 is connected with a contact screw rod 4, and the static contact 36 and the dynamic contact 37 are correspondingly matched up and down.
The fixed contact 36 and the movable contact 37 are both provided with a contact seat 38, and the contact seat 38 is a cup-shaped contact seat provided with a spiral groove; the cup-shaped contact seat with the spiral groove is reasonably designed on the contact structure, when the contact has current, the contact seat can generate a longitudinal magnetic field, and the electromagnetic field is uniformly, reasonably and stably distributed, so that the breaking capacity of the contact is greatly improved.
A bellows 39 is sealed between the movable conducting rod 35 and the upper cover plate 32.
And shielding covers are arranged around the fixed contact 36, the movable contact 37 and the corrugated pipe 39.
The static contact 36 and the moving contact 37 are made of CuCr50, and have high mechanical strength, oxidation resistance, corrosion resistance and electrical conductivity.
The ceramic tube 31 is made of alumina electronic ceramic which can completely meet all requirements of the vacuum arc-extinguishing chamber, and has the advantages of good bending strength, vacuum compactness, strict expansion coefficient and high reliability, no need of high metallization temperature and good oxidation resistance.
The insulating frame 1 is of a closed box type structure, and the insulating frame 1 is made of dimethyl carbonate.
The original insulating frame 1 is designed according to a still open type, so that the movable conductive flexible wire and part of parts of the operating mechanism are exposed outside, and if the flexible wire touches other matched products, short circuit faults are easily caused. Foreign matters can easily invade the interior of the operating mechanism, so that moving components are blocked or stuck, and the circuit breaker has the fault phenomena of closing resistance and opening resistance. The insulating frame 1 of the embodiment is designed into a closed box type structure, and all components can be packaged in the insulating frame, so that the insulating performance of the circuit breaker is improved. The insulating frame 1 is formed by pressing DMC plastic material with high strength, and has high mechanical strength and compressive strength. The circuit breaker with the sealed box body type structure has beautiful appearance and can effectively prevent foreign matters from invading, thereby improving the stability and reliability of closing and opening of the circuit breaker.
The improvement of the electromagnetic operating mechanism part of the vacuum circuit breaker of the embodiment is mainly to make a great improvement on the holding hook 11 device. The former circuit breaker adopts a two-stage tripping mechanism, when a closing coil is electrified and closed, an armature iron and an insulation crank arm on the armature iron rotate for a certain angle, and a contact screw drives a contact of a vacuum arc extinguish chamber to be closed through an overtravel spring. At the moment, a tool bit at the upper end of the armature iron slides into a hook groove of the retaining hook, the other end of the retaining hook is buckled by the opening rotating shaft to realize mechanical retaining, and the opening rotating shaft is controlled by the shunt excitation coil, the under-voltage coil and the manual tripping device to enable the opening rotating shaft to rotate and trip, so that the purpose of opening the brake is achieved. The electromagnetic operating mechanism has more parts and larger friction resistance, thereby having more fault points and influencing the service life. The holding hook 11 of the embodiment is designed in a rolling friction mode, namely a roller 13 is arranged at the upper end of the armature plate 6, the closing coil 10 is electrified and attracted to drive the armature plate 6 to rotate for a certain angle, so that the roller 13 on the armature plate rolls into a U-shaped groove 14 of the holding hook 11 to be locked in a self-locking manner, and mechanical holding is realized. The other end of the holding hook 11 is controlled by the shunt coil 9 and the manual brake separating device, so that the holding hook 11 is rotated to be released, and the purpose of brake separating is achieved. The circuit breaker of this embodiment has removed the decompression trip gear, has still taken the separating brake pivot machine hook simultaneously, belongs to one-level tripping device. The improved circuit breaker not only has all the characteristics of the original electromagnetic operating mechanism, but also has the characteristic of few parts of the permanent magnet mechanism, and overcomes the fault phenomena of rejection and separation caused by demagnetization after a permanent magnet of the permanent magnet mechanism circuit breaker is used for a period of time, so that the circuit breaker can be compared favorably with the permanent magnet circuit breaker.
the controller 12 is used for controlling the on-off of the current of the closing coil 10 and the opening coil of the circuit breaker, and adopts a microcomputer control mode.
The vacuum arc-extinguishing chamber 3 is a core component of a main circuit of the circuit breaker, and the current of the main circuit of the circuit breaker is conducted and disconnected by closing and separating a moving contact and a static contact in the vacuum arc-extinguishing chamber 3 through an operating mechanism of the circuit breaker. When the static contact 36 is switched on under the action of the operating mechanism, the static and static contacts are switched on, otherwise, when the static and static contacts are switched off in an electrified way, vacuum electric arcs are generated between the contacts, the vacuum electric arcs are maintained by metal steam evaporated from the contacts, until the current is close to zero, the metal steam is close to stop evaporation, meanwhile, plasma added with the vacuum electric arcs is diffused to the periphery quickly, the electric arcs are extinguished, the contact gaps are changed into insulators quickly, and then the current is cut off.
The vacuum interrupter 3 of this embodiment adopts more advanced complete one-time to seal row production mode, directly assembles into the whole with 3 all parts of vacuum interrupter, then once accomplishes in the vacuum furnace exhaust, toasts, the process of brazing the seal, its process flow: cleaning and electroplating, assembling the whole pipe, sealing and exhausting in a furnace, aging the process, storing and baking.
The above detailed description of the embodiments of the present invention is only for exemplary purposes, and the present invention is not limited to the above detailed description. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, variations and modifications in equivalents may be made without departing from the spirit and scope of the invention, which is intended to be covered by the following claims.
Claims (8)
1. A three-phase box type vacuum circuit breaker is characterized in that:
the device comprises an insulating frame (1), wherein a conducting plate (2), a vacuum arc extinguish chamber (3), a contact screw (4), an over travel spring (15), an insulating arm (5), an armature plate (6), a travel switch (7), a yoke (8), a shunt coil (9), a closing coil (10), a holding hook (11) and a controller (12) are arranged in the insulating frame (1), the conducting plate (2), the vacuum arc extinguish chamber (3), the contact screw (4) and the over travel spring (15) are positioned on one side in the insulating frame (1), and the armature plate (6), the travel switch (7), the yoke (8), the shunt coil (9), the closing coil (10), the holding hook (11) and the controller (12) are positioned on the other side in the insulating frame (1);
The upper end of the conducting plate (2) extends out of the insulating frame (1), the lower end of the conducting plate (2) is connected with the top of the vacuum arc-extinguishing chamber (3), the bottom of the vacuum arc-extinguishing chamber (3) is connected with the upper part of the contact screw (4), the contact screw (4) penetrates through one end of the insulating arm (5), the contact screw (4) is sleeved with an over travel spring (15), the top of the over travel spring (15) is connected with the top of the contact screw (4), the bottom of the over travel spring (15) is connected with the top of the insulating arm (5), the insulating arm (5) is transversely arranged, the other end of the insulating arm (5) is connected with the bottom of the armature plate (6), the travel switch (7) is connected with the bottom of the armature plate (6) in a matched manner, the top of the armature plate (6) is provided with a roller (13), the yoke (8) is arranged on one side of the armature plate (6), the shunt coil (9), the closing coil (10) and the holding hook (11) are all arranged on one side, facing the armature plate (6), of the yoke (8), a U-shaped groove (14) is formed in the portion, matched with the roller (13), of the holding hook (11), and the controller (12) is located above the yoke (8).
2. A three-phase tank type vacuum circuit breaker according to claim 1, characterized in that:
the vacuum arc extinguish chamber (3) comprises a ceramic tube (31), an upper cover plate (32), a lower cover plate (33), a static conducting rod (34) and a movable conducting rod (35), the upper cover plate (32) is arranged at the top of the ceramic tube (31), the lower cover plate (33) is arranged at the bottom of the ceramic tube (31), the top of the static conductive rod (34) is connected with the conductive plate (2), the bottom of the static conductive rod (34) penetrates through the upper cover plate (32) and extends into the ceramic tube (31), the bottom of the static conductive rod (34) is provided with a static contact (36), the top of the movable conductive rod (35) penetrates through the lower cover plate (33) and extends into the ceramic tube (31), the top of the movable conducting rod (35) is provided with a movable contact (37), the bottom of the movable conducting rod (35) is connected with the contact screw (4), and the static contact (36) and the movable contact (37) are correspondingly matched up and down.
3. A three-phase tank type vacuum circuit breaker according to claim 2, characterized in that:
The static contact (36) and the moving contact (37) are both provided with a contact seat (38), and the contact seat (38) is a cup-shaped contact seat provided with a spiral groove.
4. A three-phase tank type vacuum circuit breaker according to claim 2, characterized in that:
A corrugated pipe (39) is sealed between the movable conducting rod (35) and the ceramic pipe (31).
5. the three-phase tank type vacuum circuit breaker according to claim 4, characterized in that:
And shielding covers are arranged around the static contact (36), the movable contact (37) and the corrugated pipe (39).
6. A three-phase tank type vacuum circuit breaker according to claim 2, characterized in that:
The static contact (36) and the movable contact (37) are made of CuCr 50.
7. A three-phase tank type vacuum circuit breaker according to claim 2, characterized in that:
The ceramic tube (31) is made of alumina electronic ceramic.
8. A three-phase tank type vacuum circuit breaker according to claim 1, characterized in that:
The insulating frame (1) is of a closed box type structure, and the insulating frame (1) is made of dimethyl carbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921067552.9U CN209785830U (en) | 2019-07-09 | 2019-07-09 | Three-phase box type vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921067552.9U CN209785830U (en) | 2019-07-09 | 2019-07-09 | Three-phase box type vacuum circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209785830U true CN209785830U (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921067552.9U Active CN209785830U (en) | 2019-07-09 | 2019-07-09 | Three-phase box type vacuum circuit breaker |
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| Country | Link |
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| CN (1) | CN209785830U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110211839A (en) * | 2019-07-09 | 2019-09-06 | 景德镇永鑫真空电器有限公司 | A kind of three-phase box type vacuum breaker |
-
2019
- 2019-07-09 CN CN201921067552.9U patent/CN209785830U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110211839A (en) * | 2019-07-09 | 2019-09-06 | 景德镇永鑫真空电器有限公司 | A kind of three-phase box type vacuum breaker |
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