Outdoor voltage transformer

Abstract

The outdoor voltage transformer comprises a transformer body, an insulator and a wiring terminal, the wiring terminal is arranged above the transformer body, the wiring terminal is arranged at the upper end of the insulator, a fusing cavity is arranged in the insulator, a fuse is arranged in the fusing cavity, and a fuse is arranged in the fuse. A limiting cavity is formed under the wiring terminal, a conducting rod is movably inserted into the limiting cavity, the upper end of the upper clamping block is sleeved with a reset spring, the fuse makes movable contact with the wiring terminal, the upper clamping block is annularly arranged on the outer side of the fuse, the upper clamping block is movably hinged to the interior of the insulator, and the lower portion of the fuse is movably sleeved with a lower clamping sleeve. A clamping block is annularly arranged on the outer side of the lower clamping sleeve, a limiting block is connected to the lower portion of the insulator through a bolt, a clamping groove is annularly formed in the limiting block, and the clamping block is movably clamped in the clamping groove. The fuse is convenient to mount and dismount, low in mounting cost and worthy of popularization and application.

Description

Technical Field

[0001] The utility model relates to the technical field of mutual inductors, in particular to an outdoor voltage mutual inductor. Background Art

[0002] Voltage transformers are important electrical devices commonly used in power systems. Their primary function is to convert high-voltage electrical energy into low voltage for measurement and protection purposes. Because voltage transformers operate at relatively high voltages, a failure in a voltage transformer could damage electrical equipment or cause a safety incident.

[0003] The primary purpose of installing a fuse before a voltage transformer is to protect the voltage transformer and other electrical equipment from damage caused by overcurrent. When an overcurrent occurs in the circuit, the fuse automatically disconnects the circuit, protecting the voltage transformer and other electrical equipment. Furthermore, because fuses operate faster than circuit breakers, using fuses can protect equipment more quickly, reducing the risk of potential accidents.

[0004] In the prior art, it is inconvenient to install the fuse on the voltage transformer. If the fuse is damaged, it is not easy to replace the fuse, which makes it difficult to effectively ensure the use of the voltage transformer. To address this problem, we propose an outdoor voltage transformer. Utility Model Content

[0005] The purpose of the present utility model is to provide an outdoor voltage transformer to solve the problem in the prior art proposed in the above background technology that the installation of the fuse on the voltage transformer is inconvenient, and after the fuse is damaged, it is not conducive to the replacement of the fuse, thereby making it difficult to effectively ensure the use effect of the voltage transformer.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a voltage transformer for outdoor use, comprising a transformer body, an insulator and a wiring terminal, wherein the wiring terminal is arranged above the transformer body, and the wiring terminal is arranged at the upper end of the insulator, a fuse cavity is arranged inside the insulator, a fuse is arranged inside the fuse cavity, a limiting cavity is opened directly below the wiring terminal, a conductive rod is movably inserted into the limiting cavity, a reset spring is sleeved on the upper end of the conductive rod, the fuse and the wiring terminal are movably contacted, and an upper clamping block is arranged in an annular shape on the outside of the fuse, the upper clamping block is movably hinged to the inside of the insulator, a lower clamping sleeve is movably sleeved below the fuse, a clamping block is arranged in an annular shape on the outside of the lower clamping sleeve, the limiting block is bolted to the bottom of the insulator, a clamping groove is opened in an annular shape on the limiting block, and the clamping block is movably clamped inside the clamping groove.

[0007] Preferably, the widths of the clamping slots and the clamping blocks are equal, and the number of the clamping blocks and the clamping slots corresponds to each other.

[0008] Preferably, the lower clamping sleeve is in movable contact with the lower end portion of the fuse, and a hole groove for plugging the fuse is provided on the lower clamping sleeve.

[0009] Preferably, the centers of the wiring terminal, the conductive rod and the fuse are collinear, and the wiring terminal is in contact with the side wall of the conductive rod.

[0010] Preferably, the side wall of the limiting cavity is in contact with the outer side surface of the conductive rod, and the conductive rod is in the shape of an "I".

[0011] Preferably, the return spring is arranged inside the limiting cavity.

[0012] Preferably, the lower ferrule is movably connected to the limit block.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The outdoor voltage transformer can protect the voltage transformer and other electrical equipment from being damaged by overcurrent by embedding the fuse inside the insulator and making the fuse contact with the terminal. When the fuse is disassembled, the insulator and the transformer body are separated, and a pushing force from bottom to top is provided to the lower clamping sleeve. At this time, the reset spring is compressed and, at the same time, a rotational force is provided to the lower clamping sleeve, so that the upper and lower positions of the clamping block and the clamping groove on the limit block on the lower clamping sleeve correspond to each other. The lower clamping sleeve can be pulled out to make the fuse detached from the inside of the fuse cavity. Similarly, the opposite operation can be performed to complete the installation operation of the fuse. In summary, this solution is convenient for the installation and removal of the fuse, and the installation cost is low, so it is worthy of promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the partial main cross-sectional structure of the utility model;

[0017] Figure 3 For the utility model Figure 2 The enlarged view of M;

[0018] Figure 4 This is a schematic diagram of the use status of the limit block and the clamping sleeve of the utility model;

[0019] Figure 5 This is a schematic diagram of the plug-in state of the limit block and the ferrule of the utility model.

[0020] In the figure: 1. Transformer body; 2. Terminal block; 3. Insulator; 4. Fuse cavity; 5. Fuse; 6. Upper clamping block; 7. Lower clamping sleeve; 71. Clamping block; 81. Limiting cavity; 82. Reset spring; 83. Conductive rod; 9. Limiting block; 91. Clamping slot. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example: See Figure 1-5 The present utility model provides a technical solution: an outdoor voltage transformer. This solution addresses the existing problem of inconvenient fuse installation on voltage transformers, which makes it difficult to replace damaged fuses, thus hindering effective use of the voltage transformer. The specific solution is as follows: the transformer comprises a transformer body 1, an insulator 3, and a terminal block 2. The terminal block 2 is located above the transformer body 1 and at the upper end of the insulator 3.

[0023] Furthermore, a fuse cavity 4 is provided within the insulator 3, and a fuse 5 is provided within the fuse cavity 4. Fuse 5 protects the voltage transformer and other electrical equipment from damage due to overcurrent. When an overcurrent occurs in the circuit, fuse 5 automatically disconnects the circuit to protect the voltage transformer and other electrical equipment. A limit cavity 81 is provided directly below the terminal 2, and a conductive rod 83 is movably inserted within the limit cavity 81. Conductive rod 83 is made of brass, an alloy material with excellent electrical conductivity. It is mainly composed of copper and zinc, and typically contains trace amounts of other metal elements. Using it as a transfer conductive component can facilitate electrical transmission.

[0024] The connection terminal 2, the conductive rod 83 and the fuse 5 are collinear, and the connection terminal 2 contacts the sidewall of the conductive rod 83. The sidewall of the limiting cavity 81 contacts the outer side of the conductive rod 83, and the conductive rod 83 is in an "I" shape.

[0025] See also Figure 2 and Figure 3A return spring 82 is sleeved on the upper end of the conductive rod 83 and disposed within the retaining cavity 81. Initially, the return spring 82 positions the conductive rod 83 at the lower end of the fuse cavity 4. When the fuse 5 is inserted into the insulator 3, the elastic action of the return spring 82 facilitates the insertion of the fuse 5 and further enhances its stability.

[0026] See also Figure 2 、 Figure 4 and Figure 5 , wherein the fuse 5 and the terminal 2 are in movable contact, and an upper clamping block 6 is provided in an annular shape on the outside of the fuse 5, and the upper clamping block 6 is movably hinged inside the insulator 3. A lower clamping sleeve 7 is movably sleeved below the fuse 5, and the lower clamping sleeve 7 is in movable contact with the lower end of the fuse 5, and a hole groove for plugging in the fuse 5 is provided on the lower clamping sleeve 7. A clamping block 71 is provided in an annular shape on the outside of the lower clamping sleeve 7, and a limiting block 9 is bolted to the bottom of the insulator 3, and the lower clamping sleeve 7 is movably plugged into the limiting block 9. A clamping groove 91 is provided in an annular shape on the limiting block 9, and the clamping block 71 is movably clamped inside the clamping groove 91. The clamping groove 91 and the clamping block 71 have the same width, and the number of the clamping blocks 71 and the clamping groove 91 corresponds to each other. When disassembling the fuse 5, the insulator 3 and the transformer body 1 are separated, and a pushing force from bottom to top is provided to the lower clamping sleeve 7. At this time, the reset spring 82 is compressed, and at the same time, a rotational force is provided to the lower clamping sleeve 7, so that the upper and lower positions of the clamping block 71 on the lower clamping sleeve 7 and the clamping groove 91 on the limit block 9 correspond to each other. Pulling out the lower clamping sleeve 7 can make the fuse 5 detached from the inside of the fuse cavity 4; similarly, the opposite operation can be carried out to complete the installation operation of the fuse 5.

[0027] Working principle: This outdoor voltage transformer, when in use, Figure 1 and Figure 4 When the fuse 5 is removed from the fuse cavity 4, the fuse 5 is removed from the fuse cavity 4 by pulling out the lower clamping block 71 and the clamping groove 91. When the fuse 5 is removed from the fuse cavity 4, the fuse 5 is removed from the fuse cavity 4 by pulling out the lower clamping block 71 and the clamping groove 91. When the fuse 5 is removed from the fuse cavity 4, the fuse 5 is removed from the fuse cavity 4 by pulling out the lower clamping block 71 and the clamping groove 91. When the fuse 5 is removed from the fuse cavity 4, the fuse 5 is removed from the fuse cavity 4 by pulling out the lower clamping block 71 and the clamping groove 91.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An outdoor voltage transformer, comprising a transformer body (1), an insulator (3) and a terminal (2), wherein the terminal (2) is arranged above the transformer body (1) and the terminal (2) is arranged at the upper end of the insulator (3), characterized in that: A fuse cavity (4) is provided inside the insulator (3), a fuse (5) is provided inside the fuse cavity (4), a limit cavity (81) is provided directly below the terminal (2), a conductive rod (83) is movably inserted inside the limit cavity (81), a reset spring (82) is sleeved on the upper end of the conductive rod (83), the fuse (5) and the terminal (2) are in movable contact, and an upper clamping block (6) is provided in an annular shape on the outside of the fuse (5), the upper clamping block (6) is movably hinged inside the insulator (3), a lower clamping sleeve (7) is movably sleeved below the fuse (5), a clamping block (71) is provided in an annular shape on the outside of the lower clamping sleeve (7), a limit block (9) is bolted to the bottom of the insulator (3), a clamping groove (91) is provided in an annular shape on the limit block (9), and the clamping block (71) is movably clamped inside the clamping groove (91).

2. The outdoor voltage transformer according to claim 1, characterized in that: The widths of the clamping slot (91) and the clamping block (71) are equal, and the number of the clamping blocks (71) and the clamping slot (91) corresponds.

3. The outdoor voltage transformer according to claim 1, characterized in that: The lower clamping sleeve (7) is in movable contact with the lower end of the fuse (5), and a hole groove for plugging the fuse (5) is provided on the lower clamping sleeve (7).

4. The outdoor voltage transformer according to claim 1, characterized in that: The centers of the connection terminal (2), the conductive rod (83) and the fuse (5) are collinear, and the side walls of the connection terminal (2) and the conductive rod (83) are in contact.

5. The outdoor voltage transformer according to claim 1, characterized in that: The side wall of the limiting cavity (81) contacts the outer side surface of the conductive rod (83), and the conductive rod (83) is in the shape of an "I".

6. The outdoor voltage transformer according to claim 1, characterized in that: The return spring (82) is arranged inside the limiting cavity (81).

7. The outdoor voltage transformer according to claim 1, characterized in that: The lower ferrule (7) is movably plugged into the limiting block (9).

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