CN111585205A

CN111585205A - Magnetic coupling type distribution network mechanical load switch cabinet

Info

Publication number: CN111585205A
Application number: CN202010467816.0A
Authority: CN
Inventors: 姚宁; 吴中友; 王智勇; 陈新; 李德召; 吕玮; 陈羽
Original assignee: NR Electric Co Ltd; NR Engineering Co Ltd; Changzhou NR Electric Power Electronics Co Ltd
Current assignee: NR Electric Co Ltd; NR Engineering Co Ltd; Changzhou NR Electric Power Electronics Co Ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2020-08-25

Abstract

The invention discloses a magnetic coupling type distribution network mechanical load switch cabinet which comprises a cabinet body, wherein the cabinet body comprises a device chamber, a valve chamber and a handcart chamber, the device chamber is positioned above the valve chamber, the handcart chamber is positioned on the side surfaces of the device chamber and the valve chamber, a magnetic coupling trigger circuit is arranged in the device chamber, a transfer branch and a magnetic coupling reactor are arranged in the valve chamber, the transfer branch can enter and exit in the valve chamber, the magnetic coupling reactor is fixed at the top of the transfer branch, the magnetic coupling trigger circuit is connected with the magnetic coupling reactor through a copper bar, a rapid switch handcart and a contact box are arranged in the handcart chamber, and the rapid switch handcart is pushed into the handcart chamber to be spliced with the contact box. The invention provides a magnetic coupling type distribution network mechanical load switch cabinet which is simple and compact in structure and convenient to assemble and maintain in a later period.

Description

Magnetic coupling type distribution network mechanical load switch cabinet

Technical Field

The invention relates to a magnetic coupling type distribution network mechanical load switch cabinet.

Background

At present, with the development of a direct-current power supply (a distributed power supply and an energy storage technology) and a direct-current load (different types of loads such as an electric vehicle and the like are connected in a grid), the development of a direct-current power distribution technology is promoted in recent years. Compared with alternating current power distribution, the direct current power distribution technology has the characteristics of large transmission power, small power loss, asynchronous operation, high power supply reliability and the like. The on-off current of the 10kV direct current load switch is direct current and has no natural zero crossing point, so when the rated current is switched off, the zero crossing point needs to be artificially created to realize arc extinction and complete the on-off of the rated current. At present, a scheme based on rapid switch opening and magnetic coupling coil coupling current for current transfer and forming a load switch cabinet is a feasible scheme.

The +/-10 kV direct-current load switch cabinet is used as key equipment in a medium-low voltage direct-current power distribution and utilization system, is electrical equipment between a direct-current circuit breaker and a disconnecting switch, has a simple arc extinguishing function, and can cut off rated load current and certain overload current. But the current load switch cabinet structure is complicated, and assembly and maintenance are loaded down with trivial details, bring very big inconvenience for production and later maintenance.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects of the prior art and provides a magnetic coupling type distribution network mechanical load switch cabinet which is simple and compact in structure and convenient to assemble and maintain in later period.

In order to solve the technical problems, the technical scheme of the invention is as follows: provide for

The utility model provides a net mechanical type load switch cabinet is joined in marriage to magnetic coupling type, it includes the cabinet body, the cabinet body includes device room, valve chamber and handcart room, the device room is located the top of valve chamber, the handcart room is located the side of device room and valve chamber, the indoor magnetic coupling trigger circuit that is provided with of device, be provided with in the valve chamber and shift branch road and magnetic coupling reactor, it can pass in and out at the valve indoor business turn over to shift the branch road, the magnetic coupling reactor is fixed at the top of shifting the branch road, magnetic coupling trigger circuit and magnetic coupling reactor pass through the copper bar and link to each other, the indoor quick switch handcart and the contact box of being provided with of handcart, the quick switch handcart is pushed into the handcart.

Further, the fast switch handcart includes fast switch, trigger circuit and handcart, fast switch and trigger circuit pass through the screw mounting on the handcart, the handcart bottom is provided with the handcart gyro wheel, be provided with on the lateral wall of handcart room with the gliding handcart guide rail of handcart gyro wheel cooperation, the bottom of handcart is provided with handle (124).

Furthermore, a separation knife is further fixed in the handcart room.

Further, the top of the transfer branch is connected with the magnetic coupling reactor through a first insulator.

Further, the bottom of the transfer branch is connected with a base through a second insulator, universal wheels are arranged at the bottom of the base, and guide rails matched with the universal wheels to slide are arranged at the bottom of the valve chamber.

Furthermore, a supporting plate is fixed in the valve chamber, and a lightning arrester is fixed on the supporting plate.

By adopting the technical scheme, the invention has the following beneficial effects:

(1) according to the invention, the size and the structure of the quick switch and the trigger circuit are optimized, so that the quick switch and the trigger circuit can be integrally assembled on the handcart, the trigger circuit and the quick switch can conveniently enter and exit the cabinet body, and meanwhile, the installation and later-stage maintenance are also facilitated.

(2) According to the invention, the universal wheels are arranged at the bottom of the transfer branch, and the guide rails are arranged at the bottom of the cabinet body, so that the transfer branch can conveniently enter and exit the cabinet body. Meanwhile, due to the fact that devices on the transfer branch are more, the later-stage maintenance is required to be carried out regularly. Therefore, through universal wheel and guide rail structure, the installation and later maintenance are facilitated.

(3) According to the invention, the magnetic coupling reactor and the magnetic coupling trigger circuit are separately installed, the magnetic coupling reactor is installed on the upper part of the transfer branch, the magnetic coupling trigger circuit is installed in the device chamber, and the magnetic coupling reactor and the magnetic coupling trigger circuit are mutually connected through the copper bar, so that the installation and maintenance are convenient, the space of the cabinet body is saved, and the structure of the cabinet body is more compact.

(4) The lightning arrester is arranged on the supporting plate in advance, and is integrally arranged on the cabinet body through the hole positions which are arranged on the cabinet body in advance, so that the lightning arrester is convenient to install and later-stage overhaul and maintenance.

(5) According to the invention, the transfer branch, the quick switch handcart and the magnetic coupling discharge circuit are reasonably arranged, so that the size of the load switch cabinet is the most compact on the premise that the overall arrangement of the load switch cabinet meets the electrical requirements.

Drawings

Fig. 1 is a perspective view of a magnetic coupling type distribution network mechanical load switch cabinet of the present invention;

fig. 2 is a front view of a magnetic coupling type distribution network mechanical load switch cabinet of the present invention;

fig. 3 is a back view of a magnetic coupling type distribution network mechanical load switch cabinet of the present invention;

fig. 4 is a perspective view of the quick-switch hand truck of the present invention;

FIG. 5 is a rear elevational view of the valve housing of the present invention;

fig. 6 is a right side view of fig. 2.

Detailed Description

In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

As shown in fig. 1 to 6, a magnetic coupling type distribution network mechanical load switch cabinet includes a cabinet body 11, the cabinet body 11 includes a device chamber 111, a valve chamber 112 and a handcart chamber 113, the device chamber 111 is located above the valve chamber 112, the handcart chamber 113 is located on the side surfaces of the device chamber 111 and the valve chamber 112, a magnetic coupling trigger circuit 3 is arranged in the device chamber 111, a transfer branch 2 and a magnetic coupling reactor 4 are arranged in the valve chamber 112, the transfer branch 2 can enter and exit in the valve chamber 112, the magnetic coupling reactor 4 is fixed on the top of the transfer branch 2, the magnetic coupling trigger circuit 3 is connected with the magnetic coupling reactor 4 through a copper bar, and the magnetic coupling trigger circuit 3 and the magnetic coupling reactor 4 form a magnetic coupling discharge. To save space and facilitate assembly and maintenance, the magnetic coupling trigger circuit 3 is installed in the device chamber 111. The magnetic coupling reactor 4 is installed on the transfer branch 2 through the insulator 9, so that the potential isolation of the magnetic coupling trigger circuit 3 and the magnetic coupling reactor 4 is realized, and during assembly, the magnetic coupling reactor 4 is installed on the transfer branch 2 in advance and then enters and exits the valve chamber 112 along with the transfer branch 2. A rapid switch handcart 1 and a contact box 14 are arranged in the handcart chamber 113, and the contact box 14 is inserted after the rapid switch handcart 1 is pushed into the handcart chamber 113.

As shown in fig. 2, 4 and 6, the rapid switch handcart 1 comprises a rapid switch 12, a trigger circuit 13 and a handcart 121, the rapid switch 12 and the trigger circuit 13 are mounted on the handcart 121 through screws, handcart rollers 122 are arranged at the bottom of the handcart 121, a handcart guide rail 123 matched with the handcart rollers 122 to slide is arranged on the side wall of the handcart room 113, a handle 124 is arranged at the bottom of the handcart 121, and therefore the rapid switch handcart 1 can conveniently enter and exit from the cabinet body, and is convenient to mount, overhaul and maintain. The pair of contact fingers 125 on the fast switch 12 is inserted into the pair of contact boxes 14, and the contact boxes 14 are connected with the transfer branch circuit 2 through copper bars, so that the fast switch 12 is connected with the transfer branch circuit 2 in parallel. The invention automatically creates the zero crossing point through the magnetic coupling discharge loop, thereby quickly switching off the rated direct current through the quick switch 12, having simple arc extinguishing function and being capable of cutting off the rated load current and a certain overload current.

As shown in fig. 3, the isolation knife 15 is directly fixed in the handcart room 113 through screws, and the isolation knife 15 is used for maintenance grounding.

As shown in fig. 2, the top of the transfer leg 2 is connected to the magnetic coupling reactor 4 through a first insulator 9.

As shown in fig. 2, the bottom of the transfer branch 2 is connected to a base 21 through a second insulator 6, the bottom of the base 21 is provided with a universal wheel 7, and a guide rail 8 which is matched with the universal wheel 7 to slide is fixedly connected to the valve chamber 112 through a screw, so that the transfer branch 2 can conveniently enter and exit the valve chamber 112, and installation, maintenance and repair are facilitated.

As shown in fig. 2 and 3, a support plate 10 is fixed in the valve chamber 112 by screws, a lightning arrester 5 is fixed on the support plate 10, and the lightning arrester 5 and the support plate 10 are installed outside the back surface of the valve chamber 112 as a whole, so that the installation and the maintenance are convenient.

The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a net mechanical type load switch cabinet is joined in marriage to magnetic coupling type which characterized in that: it comprises a cabinet body (11), wherein the cabinet body (11) comprises a device chamber (111), a valve chamber (112) and a handcart chamber (113), the device chamber (111) is positioned above the valve chamber (112), the handcart chamber (113) is positioned on the side surfaces of the device chamber (111) and the valve chamber (112), a magnetic coupling trigger loop (3) is arranged in the device chamber (111), a transfer branch (2) and a magnetic coupling reactor (4) are arranged in the valve chamber (112), the transfer branch (2) can enter and exit in the valve chamber (112), the magnetic coupling reactor (4) is fixed at the top of the transfer branch (2), the magnetic coupling trigger circuit (3) is connected with the magnetic coupling reactor (4) through a copper bar, a rapid switch handcart (1) and a contact box (14) are arranged in the handcart chamber (113), the rapid switch handcart (1) is pushed into a handcart chamber (113) and is inserted into the contact box (14).

2. The magnetic coupling type distribution network mechanical load switch cabinet of claim 1, characterized in that: quick-switch handcart (1) includes quick-switch (12), trigger circuit (13) and handcart (121), quick-switch (12) and trigger circuit (13) are installed on handcart (121) through the screw, handcart (121) bottom is provided with handcart gyro wheel (122), be provided with on the lateral wall of handcart room (113) with the gliding handcart guide rail (123) of handcart gyro wheel (122) cooperation, the bottom of handcart (121) is provided with handle (124).

3. The magnetic coupling type distribution network mechanical load switch cabinet of claim 1, characterized in that: a separation knife (15) is also fixed in the handcart room (113).

4. The magnetic coupling type distribution network mechanical load switch cabinet of claim 1, characterized in that: the top of the transfer branch (2) is connected with the magnetic coupling reactor (4) through a first insulator (9).

5. The magnetic coupling type distribution network mechanical load switch cabinet of claim 1, characterized in that: the bottom of the transfer branch (2) is connected with a base (21) through a second insulator (6), a universal wheel (7) is arranged at the bottom of the base (21), and a guide rail (8) which is matched with the universal wheel (7) to slide is arranged at the bottom of the valve chamber (112).

6. The magnetic coupling type distribution network mechanical load switch cabinet of claim 1, characterized in that: a support plate (10) is fixed in the valve chamber (112), and a lightning arrester (5) is fixed on the support plate (10).