Solid insulation metering cabinet with disconnecting switch

Abstract

The utility model discloses a solid insulation metering cabinet with an isolating switch, which comprises the isolating switch, the isolating switch comprises a base frame, a first power connection part and a second power connection part, and the first power connection part and the second power connection part are respectively arranged at the upper end and the lower end of the base frame. The first power connection part and the second power connection part are electrically connected to the current transformer and the voltage transformer respectively, a rotating shaft is arranged in the middle of the base frame, a swing piece is arranged on the rotating shaft and connected with a switch rotating piece through an insulation cushion block, and the switch rotating piece can abut against the first power connection part after rotating. The rotating shaft is matched with the swinging piece and the insulating cushion block to control the switch rotating piece to rotate, so that the switch rotating piece can be attached to the first power connection part to form an electrical path between the current transformer and the voltage transformer, and when the switch rotating piece rotates to be separated from the first power connection part, the electrical path is disconnected. Therefore, the whole circuit system is switched between a closing mode and an isolation mode.

Description

Technical Field

[0001] The utility model relates to the technical field of metering cabinets, in particular to a solid-insulated metering cabinet with a disconnector. Background Art

[0002] With the rapid development of the scale of urban construction and the economy in our country, the degree of urbanization and scientification is getting higher and higher, and the construction of the power grid is also developing rapidly in step. The usage amount of high-voltage switchgear equipment is increasing, and the prevention of safety accidents is becoming more and more important.

[0003] Currently, fuses need to be preset in the ring network metering cabinet to ensure the safety of electricity use. However, fuses have a certain service life and need to be periodically repaired and replaced. At this time, the circuit needs to be cut off to prevent safety accidents. Therefore, a switch structure for the circuit needs to be designed in the metering cabinet to facilitate the maintenance by the staff. Content of the Utility Model

[0004] Therefore, to solve the above problems, the purpose of the utility model is to provide a solid-insulated metering cabinet with a disconnector, which includes a cabinet body. Current transformers and voltage transformers are respectively arranged on the upper and lower sides inside the cabinet body, and a disconnector is installed in the middle. The disconnector includes a base frame, a first power connection part and a second power connection part. The first power connection part and the second power connection part are respectively installed at the upper and lower ends of the base frame. The first power connection part and the second power connection part are respectively electrically connected to the current transformer and the voltage transformer. A fuse is also connected between the second power connection part and the voltage transformer. A switch rotating piece is hinged on the second power connection part. A rotating shaft is arranged in the middle of the base frame, and a swinging piece is arranged on the rotating shaft. The swinging piece is connected to the switch rotating piece through an insulating cushion block. After the switch rotating piece rotates, it can abut against the first power connection part to make the first power connection part and the second power connection part electrically connected.

[0005] Preferably, the switch rotating piece includes two clamping pieces arranged in pairs. Contact convex surfaces are respectively arranged on the opposite sides of the two clamping pieces. When the switch rotating piece abuts against the first power connection part, the two contact convex surfaces directly abut against and clamp the first power connection part.

[0006] Preferably, the first power connection part, the second power connection part and the switch rotating piece form a group of circuit paths, and a total of three groups of circuit paths are installed on the base frame.

[0007] Preferably, a vertical installation frame is arranged inside the cabinet body, and a plurality of installation hole positions are vertically arranged thereon. The base frame is fixed on the vertical installation frame through bolts in cooperation with the installation hole positions.

[0008] Preferably, rectangular grooves are arranged at both ends of the rotating shaft for connecting with an external driving mechanism.

[0009] The beneficial effects of the utility model are:

[0010] Install a rotary blade type disconnect switch in the metering cabinet. The rotation of the switch blade is controlled by a rotating shaft in cooperation with a swinging blade and an insulating spacer block, enabling it to fit with the first power connection part to form an electrical path between the current transformer and the voltage transformer. When the switch blade rotates and separates from the first power connection part, the electrical path is disconnected, thereby enabling the entire circuit system to switch between the closing mode and the isolation mode. Brief Description of the Drawings

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 Structural schematic diagram of the present invention;

[0013] Figure 2 Structural schematic diagram inside the cabinet;

[0014] Figure 3 Structural schematic diagram of the disconnect switch;

[0015] Figure 4 Structural schematic diagram of the switch blade;

[0016] Explanation of the reference numerals in the drawings: 1. Cabinet; 2. Current transformer; 3. Voltage transformer; 4. Disconnect switch; 5. Base frame; 51. First power connection part; 52. Second power connection part; 53. Switch blade; 531. Power connection convex surface; 54. Rotating shaft; 541. Rectangular groove; 55. Swinging blade; 56. Insulating spacer block; 6. Fuse; 7. Vertical installation frame; 71. Installation hole position.

[0017] The realization of the purpose, functional features, and advantages of the present invention will be further described in conjunction with the embodiments with reference to the drawings. Detailed Embodiments

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0019] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0020] Unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0021] Embodiment 1:

[0022] Figures 1 - 4 A solid insulation metering cabinet with a disconnector provided by the present utility model is shown, which includes a cabinet body 1, a current transformer 2, a voltage transformer 3, and a disconnector 4. The current transformer 2, the voltage transformer 3, and the disconnector 4 are installed in the cabinet body 1. Among them, the current transformer 2 and the voltage transformer 3 are respectively arranged at the upper and lower ends inside the cabinet body 1, and the disconnector 4 is arranged in the middle of the cabinet body 1. The current transformer 2 and the voltage transformer 3 are both connected to their respective related circuits. The disconnector 4 is located between the current transformer 2 and the voltage transformer 3 and is electrically connected to both of them.

[0023] Specifically, the disconnecting switch 4 includes a base frame 5, a first power connection part 51 and a second power connection part 52. The first power connection part 51 and the second power connection part 52 are respectively installed at the upper and lower ends of the base frame 5. The first power connection part 51 and the second power connection part 52 are respectively electrically connected to the current transformer 2 and the voltage transformer 3. A fuse 6 is also connected between the second power connection part 52 and the voltage transformer 3. A switch rotating piece 53 is hinged on the second power connection part 52. A rotating shaft 54 is provided in the middle of the base frame 5. A swinging piece 55 is provided on the rotating shaft 54. The swinging piece 55 is connected to the switch rotating piece 53 through an insulating spacer 56. When the rotating shaft 54 rotates, it controls the swinging piece 55 to rotate and pulls the switch rotating piece 53 through the insulating spacer 56, so that it can be directly switched between the closing mode and the isolating mode. In the closing mode, the switch rotating piece 53 is indirectly controlled by the rotating shaft 54 to rotate to a vertical state. At this time, the upper end of the switch rotating piece 53 abuts against the first power connection part 51, so that the first power connection part 51 is electrically connected to the second power connection part 52. Correspondingly, the current transformer 2 and the voltage transformer 3 are connected. In the isolating mode, the switch rotating piece 53 is indirectly controlled by the rotating shaft 54 to rotate to an inclined state. At this time, the upper end of the switch rotating piece 53 is separated from the first power connection part 51, so that the current transformer 2 and the voltage transformer 3 are not connected.

[0024] When designing the structure of the switch rotating piece 53, it is necessary to ensure that it can accurately abut against the first power connection part 51. In this embodiment, the switch rotating piece 53 includes two clip pieces arranged in pairs. On the opposite sides of the two clip pieces, there are respectively provided power connection convex surfaces 531. When the switch rotating piece 53 abuts against the first power connection part 51, the two power connection convex surfaces 531 directly abut against and clamp the first power connection part 51, ensuring that the switch rotating piece 53 can electrically connect the first power connection part 51 and the second power connection part 52.

[0025] The utility model is applied to the power distribution cabinet of a three-phase circuit. Therefore, the first power connection part 51, the second power connection part 52 and the switch rotating piece 53 form a group of circuit paths, and a total of three groups of circuit paths are installed on the base frame 5.

[0026] The cabinet body 1 is provided with a vertical installation frame 7 for fixing the base frame 5. A plurality of installation holes 71 are vertically arranged on the vertical installation frame 7. The base frame 5 is fixed on the vertical installation frame 7 by bolts in cooperation with the installation holes 71. According to the height requirement of the disconnecting switch 4, the base frame 5 can also be disassembled under the condition of power failure and then fixed on the installation holes 71 at different heights to meet the requirements.

[0027] The rotating shaft 54 can be driven by an external related device or tool. A rectangular groove 541 is provided on the two end faces of the rotating shaft 54. The external device or tool has a convex block matching with the rectangular groove 541. Through this matching relationship, the rotating shaft 54 is rotated, and then the switch rotating piece 53 is controlled.

[0028] Working principle:

[0029] When the closed circuit needs to enter the closing mode, the external driving device rotates by applying force through precisely docking with the rectangular groove 541 at the end of the rotating shaft 54, and transmits the rotation to the swinging piece 55. The switch rotating piece 53 then rotates to a vertical posture, and the double clip structure thereon firmly adheres to the first power connection part 51 through the power connection convex surface 531, forming a stable electrical connection bridge to ensure the smooth circuit between the current transformer 2 and the voltage transformer 3, and the system enters the operating state. On the contrary, in the case where the circuit needs to be disconnected and enter the isolation mode, by rotating the rotating shaft 54 in the opposite direction, the switch rotating piece 53 changes to an inclined position, and the power connection convex surface 531 is disengaged from the first power connection part 51, realizing the electrical isolation between the two, effectively cutting off the electrical path between the current transformer 2 and the voltage transformer 3, and providing a safe environment for circuit maintenance. This switching process is stable and rapid, ensuring the safety of operation and the flexibility of circuit control.

[0030] The above are only optional embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model under the inventive concept of the present utility model, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A solid insulation metering cabinet with an isolating switch (4), characterized in that: The cabinet (1) comprises a current transformer (2) and a voltage transformer (3) respectively arranged on the upper and lower sides of the cabinet (1), and an isolating switch (4) is installed in the middle, wherein the isolating switch (4) comprises a base frame (5), a first power connection part (51) and a second power connection part (52), wherein the first power connection part (51) and the second power connection part (52) are respectively installed at the upper and lower ends of the base frame (5), and the first power connection part (51) and the second power connection part (52) are respectively electrically connected to the current transformer (2) and the voltage transformer (3), A fuse (6) is also connected between the second power connection part (52) and the voltage transformer (3); a switch rotating piece (53) is hingedly connected to the second power connection part (52); a rotating shaft (54) is provided in the middle of the base frame (5); a swinging piece (55) is provided on the rotating shaft (54); the swinging piece (55) is connected to the switch rotating piece (53) through an insulating pad (56); after the switch rotating piece (53) rotates, it can contact the first power connection part (51), so that the first power connection part (51) and the second power connection part (52) are electrically connected.

2. The solid insulation metering cabinet with disconnector (4) according to claim 1, characterized in that: The switch rotating piece (53) comprises two clamping pieces arranged in pairs, and opposite sides of the two clamping pieces are respectively provided with power connection convex surfaces (531). When the switch rotating piece (53) abuts against the first power connection part (51), the two power connection convex surfaces (531) directly abut against and clamp the first power connection part (51).

3. The solid insulation metering cabinet with disconnector (4) according to claim 1, characterized in that: The first power connection part (51), the second power connection part (52) and the switch rotating piece (53) form a group of circuit paths, and a total of three groups of circuit paths are installed on the base frame (5).

4. The solid insulation metering cabinet with disconnector (4) according to claim 1, characterized in that: A vertical installation frame (7) is provided in the cabinet (1), on which a plurality of installation holes (71) are arranged vertically, and the base frame (5) is fixed to the vertical installation frame (7) by means of bolts cooperating with the installation holes (71).

5. The solid insulation metering cabinet with disconnector (4) according to claim 1, characterized in that: Rectangular grooves (541) are provided at both ends of the rotating shaft (54) for connecting to an external driving mechanism.

Images