Secondary junction box for independently leading out metering winding of capacitor voltage transformer

Abstract

The utility model relates to a secondary junction box for independently leading out a metering winding of a capacitor voltage transformer, which is characterized in that an outer door plate assembly is arranged on the outer side of a secondary junction box body, an inner partition plate assembly is arranged inside the secondary junction box body, and the inner partition plate assembly comprises an inner partition plate, an inner door plate and an inner door plate locking assembly; a metering winding wire outlet hole in the wire outlet holes is arranged on one side of the first box body side plate close to the secondary junction box body, the inner partition plate is arranged between the metering winding wire outlet hole and the adjacent wire outlet hole, one end of the inner door plate is hinged to one end of the inner partition plate, and the other end of the inner door plate is locked on the inner side of the first box body side plate through an inner door plate locking assembly. The outer door plate assembly comprises an outer door plate and an outer door plate locking assembly, one end of the outer door plate is hinged to the outer side of the second box body side plate on the other side of the secondary junction box body, and the other end of the outer door plate is locked to the outer side of the first box body side plate through the outer door plate locking assembly. According to the utility model, while the metering winding wiring cable is led out independently, the inspection and maintenance of each cable can be realized conveniently.

Description

Technical Field

[0001] The utility model relates to the field of capacitor voltage transformers, in particular to a secondary junction box for which a metering winding of a capacitor voltage transformer is independently led out. Background Art

[0002] A capacitive voltage transformer is a common electrical equipment, and its secondary junction box usually includes a terminal board, a box body and other structures. For example, a Chinese utility model patent with authorization announcement number CN207409358U discloses a secondary junction box of a capacitive voltage transformer, wherein the box body is welded on the box body of the capacitive voltage transformer, the terminal board is arranged in the box body, and the wiring holes are arranged on the lower side of the box body. The wiring screws on the terminal board realize the cable connection on both sides, and the cables on the outside of the terminal board are led out to the outside of the box body through the wiring holes on the lower side of the box body.

[0003] However, with the development of voltage transformer technology, the types of windings included are also increasing. For example, the Chinese utility model patent with the authorization announcement number CN210272029U discloses a grounded fully insulated voltage transformer, whose secondary winding includes a measuring winding, a metering winding and a protection winding, and each outlet of the secondary winding is connected to the secondary outlet box. In actual use, it is found that due to the needs of line operation and maintenance, the metering winding of the capacitive voltage transformer often needs to be set separately. In the prior art, two secondary junction boxes are usually set, and a metering winding is set separately in one of the secondary junction boxes to solve the above problems, which causes troubles in product structure design and appearance design. As described in the above CN207409358U patent, the secondary junction box of the capacitive voltage transformer in the prior art usually uses a cover plate to achieve box body sealing, and this structure is also inconvenient for cable connection and repair and maintenance.

[0004] In addition, there are also structures in the prior art that use partitions to achieve spatial separation of secondary junction boxes. For example, the Chinese utility model patent with authorization announcement number CN210272028U discloses a double-door isolated secondary junction box for current transformers, which uses a partition to divide the front part of the box into a first inner cavity and a second inner cavity. However, this structure is aimed at current transformers, and the secondary junction box is a double-door setting, which is not suitable for capacitive voltage transformers. Utility Model Content

[0005] The utility model aims to provide a secondary junction box for independently leading out the metering winding of a capacitive voltage transformer, which can realize independent leading out of the metering winding wiring cables and facilitate the inspection and maintenance of each cable.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A secondary junction box for a capacitive voltage transformer metering winding is led out separately, comprising a secondary junction box body and a terminal board, wherein the terminal board is arranged on the side where the secondary junction box body is connected to the capacitive voltage transformer body, the terminal board is provided with a terminal screw, the lower side of the secondary junction box body is provided with a plurality of outlet holes, and further comprising an outer door panel assembly and an inner partition assembly, wherein the outer door panel assembly is arranged on the side of the secondary junction box body away from the capacitive voltage transformer body, the inner partition assembly is arranged inside the secondary junction box body, the inner partition assembly comprises an inner partition, an inner door panel and an inner door panel locking assembly, wherein the metering winding in each outlet hole The wire outlet hole is arranged on a side of the first box body side panel close to the secondary junction box body, the inner partition plate is arranged between the metering winding wire outlet hole and the adjacent wire outlet hole, one end of the inner door panel is hinged to one end of the inner partition plate through an inner door panel hinge shaft, and the other end of the inner door panel is locked to the inner side of the first box body side panel through the inner door panel locking assembly, the outer door panel assembly includes an outer door panel and an outer door panel locking assembly, and one end of the outer door panel is hinged to the outer side of the second box body side panel on the other side of the secondary junction box body through the outer door panel hinge shaft, and the other end of the outer door panel is locked to the outer side of the first box body side panel through the outer door panel locking assembly.

[0008] The inner door panel locking assembly includes an inner locking plate, an inner locking knob and an inner locking bolt, wherein one end of the inner locking plate is fixed to the inner side of the first box body side plate, and the inner locking bolt passes through the inner locking plate and the inner door panel and is threadedly connected to the inner locking knob.

[0009] The head end of the inner locking bolt passing through the inner locking knob is provided with a lead sealing hole.

[0010] The outer door panel locking assembly includes a first locking plate, a second locking plate, an outer locking bolt and an outer locking knob, wherein one end of the first locking plate is fixed to the outer side of the first box body side plate, and the second locking plate is arranged at the free end of the outer door panel, and the outer locking bolt passes through the first locking plate and the second locking plate and is threadedly connected to the outer locking knob.

[0011] A middle partition is provided in the secondary junction box, and the wiring cables corresponding to the metering winding on the junction box first enter the space enclosed by the inner partition, the inner door panel, the middle partition and the first box body side panel, and then are led out from the metering winding outlet hole.

[0012] The middle partition plate is provided with a plurality of branching holes, and each branching hole corresponds one by one to a wire outlet hole on the lower side of the secondary junction box body.

[0013] The advantages and positive effects of the utility model are:

[0014] 1. The utility model utilizes an inner partition assembly to separate the metering winding outlet hole from other outlet holes, so that the wiring cables corresponding to the metering winding first enter the space enclosed by the inner partition assembly, the middle partition and the first box body side plate, and then lead out from the metering winding outlet hole on the lower side of the secondary junction box body, thereby ensuring that the metering winding wiring cables are led out separately without having to add an additional secondary junction box.

[0015] 2. The utility model is provided with an openable outer door panel and an inner door panel. When in use, the outer door panel is opened to check the wiring cables corresponding to the remaining windings. When the wiring cables of the metering winding need to be inspected and maintained, the inner door panel is opened. Therefore, the utility model can realize the separate lead-out of the wiring cables of the metering winding, and it is also convenient to realize the inspection and maintenance of each cable.

[0016] 3. The design of the inner door panel locking assembly and the outer door panel locking assembly of the utility model ensures that the inner door panel and the outer door panel can be opened and locked on the one hand, and on the other hand, the two will not affect each other. At the same time, the structure is relatively compact and will not increase the volume and installation space of the secondary junction box body. In addition, the inner door panel and the outer door panel can be rotated to the side of the second box body side panel to open, which is also convenient for personnel to operate.

[0017] 4. In order to meet the requirements of the power department, the inner locking bolt of the inner door panel locking assembly of the utility model passes through the head end of the inner locking knob and is provided with a lead sealing hole to achieve lead sealing according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Among them, 1 is the secondary junction box body, 101 is the metering winding wire outlet hole, 102 is the adjacent wire outlet hole, 103 is the first box body side panel, 104 is the second box body side panel, 2 is the terminal board, 201 is the terminal screw, 3 is the outer door panel assembly, 301 is the first locking plate, 302 is the second locking plate, 303 is the outer locking knob, 304 is the outer locking bolt, 305 is the isolation nut, 306 is the outer door panel hinge shaft, 307 is the outer door panel, 4 is the inner partition assembly, 401 is the inner partition, 402 is the inner door panel hinge shaft, 403 is the inner door panel, 404 is the inner locking bolt, 4041 is the lead sealing hole, 405 is the inner locking plate, 406 is the inner locking knob, and 5 is the middle partition. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 1As shown, the utility model includes a secondary junction box body 1, a terminal board 2, an outer door panel assembly 3 and an inner partition assembly 4, wherein the secondary junction box body 1 is provided with a terminal board 2 on one side connected to the capacitor voltage transformer body, and the terminal board 2 is provided with a terminal screw 201, which is a well-known technology in the art, the secondary junction box body 1 is provided with an outer door panel assembly 3 on the side away from the capacitor voltage transformer body, the lower side of the secondary junction box body 1 is provided with a plurality of outlet holes, the secondary junction box body 1 is provided with an inner partition assembly 4 inside, and the metering winding outlet hole 101 in each outlet hole is separated from other outlet holes by the inner partition assembly 4.

[0022] like Figure 1 As shown, in this embodiment, the inner partition assembly 4 includes an inner partition 401, an inner door panel 403 and an inner door panel locking assembly, wherein the metering winding outlet hole 101 is arranged on the side of the first box body side panel 103 close to the secondary junction box body 1, the inner partition 401 is arranged between the metering winding outlet hole 101 and the adjacent outlet hole 102 (measuring winding or protection winding outlet hole) and the lower end is welded and fixedly connected to the bottom plate of the secondary junction box body 1, and one end of the inner door panel 403 is connected to the inner door panel hinge shaft 402. The inner door panel 403 is hinged to one end of the inner partition 401, and the other end of the inner door panel 403 is locked to the inner side of the first box body side panel 103 through the inner door panel locking assembly. The outer door panel assembly 3 includes an outer door panel 307 and an outer door panel locking assembly. One end of the outer door panel 307 is hinged to the outer side of the second box body side panel 104 on the other side of the secondary junction box body 1 through the outer door panel hinge shaft 306, and the other end of the outer door panel 307 is locked to the outer side of the first box body side panel 103 through the outer door panel locking assembly. Figure 1 As shown, the utility model separates the metering winding outlet hole 101 from other outlet holes by the inner partition plate 401 and the inner door plate 403, so that the wiring cables corresponding to the metering winding are separately led out from the metering winding outlet hole 101. At the same time, the utility model is provided with an openable outer door plate 307 and an inner door plate 403. When in use, the outer door plate 307 is opened to check the wiring cables corresponding to the remaining windings. When the wiring cables of the metering winding need to be inspected and maintained, the inner door plate 403 is opened. Therefore, the utility model can realize the separate leading out of the metering winding wiring cables while facilitating the inspection and maintenance of each cable.

[0023] like Figure 1As shown, in this embodiment, the inner door panel locking assembly includes an inner locking plate 405, an inner locking knob 406 and an inner locking bolt 404, wherein one end of the inner locking plate 405 is welded and fixed to the inner side of the first box body side plate 103, and the inner locking bolt 404 passes through the inner locking plate 405 and the inner door panel 403 and is threadedly connected to the inner locking knob 406 to lock the inner door panel 403. After the inner locking knob 406 is unscrewed outward, the inner door panel 403 can be rotated around the inner door panel hinge shaft 402 to open.

[0024] like Figure 1 As shown, in this embodiment, at the request of the electric power department, a lead sealing hole 4041 is provided at the head end of the inner locking bolt 404 passing through the inner locking knob 406 to achieve lead sealing according to actual needs.

[0025] like Figure 1 As shown, in this embodiment, the outer door panel locking assembly includes a first locking plate 301, a second locking plate 302, an outer locking bolt 304 and an outer locking knob 303, wherein one end of the first locking plate 301 is welded and fixed to the outer side of the first box body side plate 103, and the second locking plate 302 is arranged at the free end of the outer door panel 307. The outer locking bolt 304 passes through the first locking plate 301 and the second locking plate 302 and is threadedly connected with the outer locking knob 303 to lock the outer door panel 307. After the outer locking knob 303 is unscrewed outward, the outer door panel 307 can be rotated around the outer door panel hinge shaft 306 to open.

[0026] The structural design of the inner door panel locking assembly and the outer door panel locking assembly of the utility model ensures that the inner door panel 403 and the outer door panel 307 are opened and locked on the one hand, and on the other hand, the two will not affect each other. At the same time, the structure is relatively compact and will not increase the volume and installation space of the secondary junction box body 1. In addition, the inner door panel 403 and the outer door panel 307 are both rotated to the side of the second box body side panel 104 to open, which is also convenient for personnel to operate.

[0027] like Figure 1 As shown, in this embodiment, a middle partition plate 5 is further provided in the secondary junction box body 1, and a plurality of branching holes are provided on the middle partition plate 5, and each branching hole corresponds to a wire outlet hole on the lower side of the secondary junction box body 1 one by one, so that the wiring cables on the wiring bolts 201 can pass through the corresponding branching holes according to different windings, and then pass through the corresponding wire outlet holes to be led out, and at the same time, the middle partition plate 5 cooperates with the inner partition plate assembly 4 to further ensure the separate isolation effect of the metering winding wiring cables.

[0028] The working principle of the utility model is:

[0029] like Figure 1As shown, the utility model separates the metering winding outlet hole 101 from other outlet holes by the inner partition plate 401 and the inner door plate 403, so that the wiring cables corresponding to the metering winding are separately led out from the metering winding outlet hole 101. At the same time, the utility model is provided with an openable outer door plate 307 and an inner door plate 403. When in use, the outer door plate 307 is opened to check the wiring cables corresponding to the remaining windings. When the wiring cables of the metering winding need to be inspected and maintained, the inner door plate 403 is opened. Therefore, the utility model can realize the separate leading out of the metering winding wiring cables while facilitating the inspection and maintenance of each cable.

Claims

1. A secondary junction box for a capacitive voltage transformer metering winding to be led out separately, comprising a secondary junction box body and a wiring board, wherein the wiring board is arranged on the side where the secondary junction box body is connected to the capacitive voltage transformer body, the wiring board is provided with a wiring screw, and the lower side of the secondary junction box body is provided with a plurality of outlet holes, characterized in that: The invention comprises an outer door panel assembly (3) and an inner partition assembly (4), wherein the outer door panel assembly (3) is arranged on a side of a secondary junction box body (1) away from a capacitive voltage transformer body, and the inner partition assembly (4) is arranged inside the secondary junction box body (1), and the inner partition assembly (4) comprises an inner partition (401), an inner door panel (403) and an inner door panel locking assembly, wherein a metering winding outlet hole (101) in each outlet hole is arranged on a side of a first box body side plate (103) close to the secondary junction box body (1), and the inner partition assembly (401) is arranged between the metering winding outlet hole (101) and an adjacent outlet hole (102), and the inner partition assembly (403) is arranged between the metering winding outlet hole (101) and an adjacent outlet hole (102). One end of the door panel (403) is hinged to one end of the inner partition plate (401) through an inner door panel hinge shaft (402), and the other end of the inner door panel (403) is locked to the inner side of the first box body side panel (103) through the inner door panel locking assembly. The outer door panel assembly (3) includes an outer door panel (307) and an outer door panel locking assembly, and one end of the outer door panel (307) is hinged to the outer side of the second box body side panel (104) on the other side of the secondary junction box body (1) through the outer door panel hinge shaft (306), and the other end of the outer door panel (307) is locked to the outer side of the first box body side panel (103) through the outer door panel locking assembly.

2. The secondary junction box for the capacitive voltage transformer metering winding to be led out separately according to claim 1, characterized in that: The inner door panel locking assembly comprises an inner locking plate (405), an inner locking knob (406) and an inner locking bolt (404), wherein one end of the inner locking plate (405) is fixed to the inner side of the first box body side plate (103), and the inner locking bolt (404) passes through the inner locking plate (405) and the inner door panel (403) and is threadedly connected to the inner locking knob (406).

3. The secondary junction box for the capacitive voltage transformer metering winding to be led out separately according to claim 2, characterized in that: The head end of the inner locking bolt (404) passing through the inner locking knob (406) is provided with a lead sealing hole (4041).

4. The secondary junction box for independently leading out the metering winding of the capacitor voltage transformer according to claim 1, characterized in that: The outer door panel locking assembly comprises a first locking plate (301), a second locking plate (302), an outer locking bolt (304) and an outer locking knob (303), wherein one end of the first locking plate (301) is fixed to the outer side of the first box body side plate (103), the second locking plate (302) is arranged at the free end of the outer door panel (307), and the outer locking bolt (304) passes through the first locking plate (301) and the second locking plate (302) and is threadedly connected to the outer locking knob (303).

5. The secondary junction box for independently leading out the metering winding of the capacitor voltage transformer according to claim 1, characterized in that: The secondary junction box body (1) is provided with an intermediate partition (5), and the wiring cables corresponding to the metering winding on the wiring board (2) first enter the space enclosed by the inner partition (401), the inner door plate (403), the intermediate partition (5) and the first box body side plate (103), and then are led out through the metering winding outlet hole (101).

6. The secondary junction box for independently leading out the metering winding of the capacitor voltage transformer according to claim 5, characterized in that: The middle partition plate (5) has a plurality of branching holes, and each branching hole corresponds one-to-one to a wire outlet hole on the lower side of the secondary junction box body (1).

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