A magnetic coupling type distribution network mechanical load switch cabinet

Abstract

The present 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 trolley chamber, wherein the device chamber is located above the valve chamber, and the trolley chamber is located at the side of the device chamber and the valve chamber, wherein a magnetic coupling trigger circuit is arranged in the device chamber, and a transfer branch and a magnetic coupling reactor are arranged in the valve chamber, wherein the transfer branch can enter and exit the valve chamber, and the magnetic coupling reactor is fixed on the top of the transfer branch, wherein the magnetic coupling trigger circuit and the magnetic coupling reactor are connected through a copper bar, wherein a fast switch trolley and a contact box are arranged in the trolley chamber, and the fast switch trolley is pushed into the trolley chamber and plugged with the contact box. The present invention provides a magnetic coupling type distribution network mechanical load switch cabinet, which has a simple and compact structure and is convenient for assembly and later maintenance.

Description

Technical Field

[0001] The invention relates to a magnetic coupling type distribution network mechanical load switch cabinet. Background Art

[0002] At present, in recent years, with the development of DC power supply (distributed power supply and energy storage technology) and DC load (grid connection of different types of loads such as electric vehicles), the development of DC distribution technology has been promoted. Compared with AC distribution, DC distribution technology has the characteristics of large transmission power, small power loss, asynchronous operation, and high power supply reliability. Since the breaking current of 10kV DC load switch is DC and there is no natural zero crossing point, it is necessary to artificially create a zero crossing point when breaking the rated current to achieve arc extinguishing and complete the rated current breaking. At present, the solution based on fast switch opening, magnetic coupling coil coupling current for current transfer, and forming a load switch cabinet is a more feasible solution.

[0003] As a key device in the medium and low voltage DC power distribution system, ±10kV DC load switch cabinet is an electrical device between DC circuit breaker and disconnector, with simple arc extinguishing function, which can cut off the rated load current and a certain overload current. However, the existing load switch cabinet has a complex structure, and the assembly and maintenance are cumbersome, which brings great inconvenience to production and later maintenance. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a magnetic coupling type distribution network mechanical load switch cabinet, which has a simple and compact structure and is easy to assemble and maintain later.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: to provide

[0006] A magnetic coupling type distribution network mechanical load switch cabinet, which includes a cabinet body, the cabinet body includes a device room, a valve room and a trolley room, the device room is located above the valve room, the trolley room is located on the side of the device room and the valve room, the device room is provided with a magnetic coupling trigger circuit, the valve room is provided with a transfer branch and a magnetic coupling reactor, the transfer branch can enter and exit the valve room, the magnetic coupling reactor is fixed on the top of the transfer branch, the magnetic coupling trigger circuit and the magnetic coupling reactor are connected through a copper bus, the trolley room is provided with a fast switch trolley and a contact box, the fast switch trolley is pushed into the trolley room and plugged with the contact box.

[0007] Furthermore, the quick switch trolley comprises a quick switch, a trigger circuit and a trolley, the quick switch and the trigger circuit being mounted on the trolley by means of screws, a trolley roller being arranged at the bottom of the trolley, a trolley guide rail slidingly cooperating with the trolley roller being arranged on the side wall of the trolley chamber, and a handle (124) being arranged at the bottom of the trolley.

[0008] Furthermore, a partition knife is fixed in the trolley chamber.

[0009] Furthermore, the top of the transfer branch is connected to the magnetic coupling reactor through a first insulator.

[0010] Furthermore, the bottom of the transfer branch is connected to a base via a second insulator, a universal wheel is provided at the bottom of the base, and a guide rail that slides in cooperation with the universal wheel is provided at the bottom of the valve chamber.

[0011] Furthermore, a support plate is fixed in the valve chamber, and a lightning arrester is fixed on the support plate.

[0012] By adopting the above technical solution, the present invention has the following beneficial effects:

[0013] (1) The present invention optimizes the size and structure of the quick switch and the trigger circuit so that the two can be assembled as a whole on the trolley, which facilitates the trigger circuit and the quick switch to enter and exit the cabinet, and also facilitates installation and subsequent inspection and maintenance.

[0014] (2) The present invention installs a universal wheel at the bottom of the transfer branch and a guide rail at the bottom of the cabinet to facilitate the transfer branch to enter and exit the cabinet. At the same time, since there are many devices on the transfer branch, regular inspection and maintenance are required in the later stage. Therefore, the universal wheel and guide rail structure facilitates installation and later inspection and maintenance.

[0015] (3) The present invention installs the magnetic coupling reactor and the magnetic coupling trigger circuit separately. The magnetic coupling reactor is installed on the upper part of the transfer branch, and the magnetic coupling trigger circuit is installed in the device room. The two are connected to each other through a copper busbar, which not only facilitates installation and maintenance, but also saves cabinet space and makes the cabinet structure more compact.

[0016] (4) The present invention pre-installs the arrester on the support plate and installs the arrester on the cabinet through the holes pre-opened on the cabinet, which is convenient for installation and subsequent inspection and maintenance.

[0017] (5) The present invention reasonably arranges the transfer branch, the fast switch trolley, and the magnetic coupling discharge circuit, so that the overall layout of the load switch cabinet meets the electrical requirements and the size is the most compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of a magnetic coupling type distribution network mechanical load switch cabinet of the present invention;

[0019] Figure 2 It is a front view of a magnetic coupling type distribution network mechanical load switch cabinet of the present invention;

[0020] Figure 3It is a rear view of a magnetic coupling type distribution network mechanical load switch cabinet of the present invention;

[0021] Figure 4 A three-dimensional diagram of the quick-opening and closing trolley of the present invention;

[0022] Figure 5 A back view of the valve chamber of the present invention;

[0023] Figure 6 for Figure 2 Right view of . DETAILED DESCRIPTION

[0024] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0025] like Figures 1 to 6 As shown, a magnetic coupling type distribution network mechanical load switch cabinet includes a cabinet body 11, the cabinet body 11 includes a device room 111, a valve room 112 and a trolley room 113, the device room 111 is located above the valve room 112, the trolley room 113 is located on the side of the device room 111 and the valve room 112, a magnetic coupling trigger circuit 3 is arranged in the device room 111, a transfer branch 2 and a magnetic coupling reactor 4 are arranged in the valve room 112, the transfer branch 2 can enter and exit the valve room 112, the magnetic coupling reactor 4 is fixed on the top of the transfer branch 2, the magnetic coupling trigger circuit 3 and the magnetic coupling reactor 4 are connected by a copper busbar, and the magnetic coupling trigger circuit 3 and the magnetic coupling reactor 4 form a magnetic coupling discharge circuit. In order to save space and facilitate assembly and maintenance, the magnetic coupling trigger circuit 3 is installed in the device room 111. The magnetic coupling reactor 4 is installed on the transfer branch 2 through the insulator 9, so as to realize the potential isolation between the magnetic coupling trigger circuit 3 and the magnetic coupling reactor 4. During assembly, the magnetic coupling reactor 4 is pre-installed on the transfer branch 2, and then enters and exits the valve chamber 112 with the transfer branch 2. The fast switch trolley 1 and the contact box 14 are arranged in the trolley chamber 113. After the fast switch trolley 1 is pushed into the trolley chamber 113, the contact box 14 is plugged in.

[0026] like Figure 2 , 4As shown in Figure 6, the fast switch trolley 1 includes a fast switch 12, a trigger circuit 13 and a trolley 121. The fast switch 12 and the trigger circuit 13 are installed on the trolley 121 by screws. A trolley roller 122 is provided at the bottom of the trolley 121. A trolley guide rail 123 that slides with the trolley roller 122 is provided on the side wall of the trolley chamber 113. A handle 124 is provided at the bottom of the trolley 121, so that the fast switch trolley 1 can be easily entered and exited from the cabinet, and is easy to install, inspect and maintain. A pair of contact fingers 125 on the fast switch 12 is plugged into a pair of contact boxes 14, and the contact box 14 is connected to the transfer branch 2 through a copper busbar, so that the fast switch 12 is connected in parallel with the transfer branch 2. The present invention creates a zero point by itself through a magnetically coupled discharge circuit, so that the rated DC current is quickly interrupted by the fast switch 12, and has a simple arc extinguishing function, and can cut off the rated load current and a certain overload current.

[0027] like Figure 3 As shown, the spacer 15 is directly fixed in the trolley chamber 113 by screws, and the spacer 15 is used for maintenance grounding.

[0028] like Figure 2 As shown, the top of the transfer branch 2 is connected to the magnetic coupling reactor 4 through the first insulator 9.

[0029] like Figure 2 As shown, the bottom of the transfer branch 2 is connected to the base 21 through the second insulator 6, and a universal wheel 7 is provided at the bottom of the base 21. The valve chamber 112 is fastened with a guide rail 8 that slides with the universal wheel 7 by screws, thereby facilitating the transfer branch 2 to enter and exit the valve chamber 112 and facilitating installation, inspection and maintenance.

[0030] like Figure 2 , 3 As shown, a support plate 10 is fixed in the valve chamber 112 by screws, and a lightning arrester 5 is fixed on the support plate 10. The lightning arrester 5 and the support plate 10 are installed as a whole on the outer back side of the valve chamber 112, which is convenient for installation and inspection and maintenance.

[0031] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetically coupled distribution network mechanical load switch cabinet, characterized in that: The invention comprises a cabinet (11), wherein the cabinet (11) comprises a device chamber (111), a valve chamber (112) and a trolley chamber (113), wherein the device chamber (111) is located above the valve chamber (112), and the trolley chamber (113) is located on the sides of the device chamber (111) and the valve chamber (112), wherein a magnetic coupling trigger circuit (3) is arranged in the device chamber (111), and a transfer branch (2) and a magnetic coupling trigger circuit (3) are arranged in the valve chamber (112). The transfer branch (2) is capable of entering and exiting 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) and the magnetic coupling reactor (4) are connected via a copper bar; a fast switch trolley (1) and a contact box (14) are arranged in the trolley chamber (113); the fast switch trolley (1) is pushed into the trolley chamber (113) and plugged into the contact box (14); The quick switch trolley (1) comprises a quick switch (12), a trigger circuit (13) and a trolley (121); the quick switch (12) and the trigger circuit (13) are mounted on the trolley (121) by means of screws; a trolley roller (122) is provided at the bottom of the trolley (121); a trolley guide rail (123) is provided on the side wall of the trolley chamber (113) and is slidably matched with the trolley roller (122); and a handle (124) is provided at the bottom of the trolley (121); A spacer knife (15) is also fixed in the trolley chamber (113); The top of the transfer branch (2) is connected to the magnetic coupling reactor (4) via a first insulator (9); The bottom of the transfer branch (2) is connected to a base (21) via a second insulator (6), a universal wheel (7) is provided at the bottom of the base (21), and a guide rail (8) that slides in cooperation with the universal wheel (7) is provided at the bottom of the valve chamber (112).

2. According to claim 1, a magnetic coupling type distribution network mechanical load switch cabinet is 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).

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