Outdoor all-insulation drop-out fuse structure

Abstract

An outdoor all-insulation drop-out fuse structure is characterized in that a fuse base and a fusible core cylinder are arranged, the fuse base is provided with an incoming cable, an outgoing cable and a transparent glass cover for observation, and the fusible core cylinder is installed in the transparent glass cover in a closed manner, so that the position state of the fusible core cylinder can be obviously seen after the fusible core cylinder breaks down and falls off; and after the inlet and outlet cables are installed, the reserved process holes are blocked by silica gel, so that the fuse is isolated from the outside, dust and salt dirt are avoided, the long-term effective operation of the fuse is ensured, and the performance is more stable and reliable.

Description

Technical Field

[0001] The utility model belongs to the field of electrical technology, and particularly relates to an outdoor fully-insulated drop-out fuse structure. Background Art

[0002] The drop-out fuse is the most commonly used short-circuit protection switch for 10kV distribution line branches and distribution transformers. The drop-out fuse is installed on the 10kV distribution line branch to reduce the scope of power outages. Because it has an obvious disconnection point and has the function of an isolating switch, it creates a safe working environment for the maintenance section lines and equipment. Installed on the distribution transformer, it can be used as the main protection of the distribution transformer. It has the characteristics of economy, easy operation, and strong adaptability to outdoor environments. It is widely used in the primary side of 10kV distribution lines and distribution transformers for protection and equipment switching operations, and has been popularized.

[0003] The existing drop-out fuse is not sealed, and the conductive part is completely exposed, which is easily affected by the external environment, and is prone to corrosion and poor contact, causing the fuse to explode and lead to line failure.

[0004] The utility model with announcement number CN220085954U discloses a standardized high-voltage drop-out fuse. The technical scheme includes a drop-out fuse body and a fuse tube. A mounting piece is fixedly installed on the surface of the drop-out fuse body, a mounting plate is fixedly installed on the upper surface of the mounting piece, a fixed plate is fixedly installed on one side of the mounting plate, a movable plate is arranged on one side of the mounting plate, and a buffer spring is fixedly installed on the upper surface of the fixed plate. The utility model is mainly used for hail weather. When hail falls and hits the upper surface of the movable plate, the movable plate moves downward to squeeze the buffer spring. The impact force of the hail falling is buffered by the buffer spring. The protective pad is used to provide certain protection to reduce the damage to the drop-out fuse body and the fuse tube caused by the impact force of the hail falling. At the same time, the fixed plate and the movable plate are used for protection to avoid the drop-out fuse body and the fuse tube being hit by hail and causing damage. The sealing performance still needs to be improved. Summary of the invention

[0005] The purpose of the utility model is to provide an outdoor fully insulated drop-out fuse structure in view of the deficiencies of the above-mentioned prior art, in which the fuse core body of the drop-out fuse is enclosed in a transparent glass cover to isolate the fuse from the outside world, avoid dust and salt pollution, ensure the long-term and effective operation of the fuse, and ensure that the performance is more stable and reliable.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] An outdoor fully insulated drop-out fuse structure comprises a fuse base and a fuse core tube mounted on the fuse base, and the fuse base is provided with an incoming cable, an outgoing cable and a transparent glass cover for observation;

[0008] An upper contact connected to the incoming cable is provided on the fuse base located above the transparent glass cover, and a lower contact connected to the outgoing cable is provided on the fuse base located below the transparent glass cover;

[0009] During assembly, the fuse core barrel is arranged in the fuse base and passes through the transparent glass cover, and the upper moving contact of the fuse core barrel abuts against the upper contact for conduction, and the lower moving contact of the fuse core barrel contacts with the lower contact for conduction.

[0010] The fuse core barrel also includes a fuse barrel and a pull rod sleeve arranged at the end of the fuse barrel, the upper moving contact is fixedly arranged on the upper end of the fuse barrel, the lower moving contact is movably sleeved on the fuse barrel and one end of the fuse is fixedly arranged on its side wall, and the other end of the fuse is arranged on the fuse barrel above the pull rod sleeve.

[0011] A first compression spring is arranged between the upper part of the upper contact and the fuse base, a second compression spring is arranged on the fuse barrel between the lower moving contact and the pull rod sleeve, and the fuse pulls the lower second compression spring to be in a compressed state.

[0012] An annular spring is also tightly bound on the outside of the lower contact.

[0013] The fuse base is a vertically arranged U-shaped seat, and the U-shaped seat includes an upper edge portion and a lower edge portion which are extended outwardly, and a protective sleeve is fixed at the lower end of the lower edge portion, and a guide hole extending outward from top to bottom is opened inside the protective sleeve.

[0014] The lower contact is arranged in the central hole of the lower edge portion and is located above the protective sleeve.

[0015] A guide sleeve is also fixedly mounted on the lower end of the transparent glass cover.

[0016] The beneficial effects of the utility model are:

[0017] (1) The outdoor fully insulated drop-out fuse structure is provided with a fuse base and a fuse core barrel, and the fuse base is provided with an incoming cable, an outgoing cable and a transparent glass cover for observation. The fuse core barrel is sealed and installed in the transparent glass cover to ensure that the position of the fuse core barrel can be clearly seen after the fuse core barrel fails and falls off; and after the incoming and outgoing cables are installed, the reserved process holes are sealed with silicone to isolate the fuse from the outside world and avoid dust and salt pollution, thereby ensuring the long-term and effective operation of the fuse and ensuring more stable and reliable performance.

[0018] (2) The fuse core is placed inside the semi-enclosed transparent glass cover of the fuse base to ensure that external rain will not affect the normal operation of the fuse.

[0019] (3) When a fuse fails, the fuse core tube falls downward under the action of the second compression spring, so that the detachment of the fuse tube can be observed in a double way. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the overall assembly diagram of the utility model;

[0021] Figure 2 yes Figure 1 A partial enlarged schematic diagram of

[0022] Figure 3 It is a schematic diagram of the structure of the fuse base;

[0023] Figure 4 It is a structural schematic diagram of the fusible core tube;

[0024] Figure 5 is a schematic diagram of the structure of the lower contact;

[0025] Figure 6 This is a diagram of the state when the fuse tube falls off. DETAILED DESCRIPTION

[0026] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0027] The utility model provides an outdoor fully insulated drop-out fuse structure, such as Figures 1 to 6 shown.

[0028] An outdoor fully insulated drop-out fuse structure comprises a fuse base 1 and a fuse core barrel 2 mounted on the fuse base 1, wherein the fuse base 1 is provided with an incoming cable 1-1, an outgoing cable 1-3 and a transparent glass cover 1-7 for observation; an upper contact 1-8 connected to the incoming cable 1-1 is provided on the fuse base 1 above the transparent glass cover 1-7, and a lower contact 1-5 connected to the outgoing cable 1-3 is provided on the fuse base 1 below the transparent glass cover 1-7.

[0029] During assembly, the fuse tube 2 is arranged in the fuse base 1 and passes through the transparent glass cover 1-7, and the upper moving contact 2-8 of the fuse tube abuts against the upper contact 1-8 for conduction, and the lower moving contact 2-4 of the fuse tube contacts the lower contact 1-5 for conduction. In this embodiment, the fuse base 1 is set as a vertically arranged U-shaped seat, and the U-shaped seat includes an upper edge portion and a lower edge portion that are extended, the upper contact 1-8 is arranged in the installation groove of the upper edge portion, and the lower contact 1-5 is installed in the center hole of the lower edge portion, and the lower end of the lower edge portion is also fixed with a protective sleeve 1-4, and the inside of the protective sleeve 1-4 is opened with a guide hole extending from top to bottom, and the lower contact 1-5 is located above the protective sleeve 1-4. In this embodiment, the right side wall of the U-shaped seat is set as an insulating support 1-2, and the lower end of the transparent glass cover is also fixedly installed with a guide sleeve 1-6.

[0030] The fuse core barrel 2 also includes a fuse barrel 2-5 and a pull rod sleeve 2-1 arranged at the end of the fuse barrel 2-5, an upper moving contact 2-8 is fixedly arranged at the upper end of the fuse barrel 2-5, a lower moving contact 2-4 is movably sleeved on the fuse barrel 2-5, and one end of the fuse 2-3 is fixedly arranged on its side wall, and the other end of the fuse 2-3 is arranged on the fuse barrel 2-5 above the pull rod sleeve 2-1; a first compression spring 1-9 is arranged between the upper part of the upper contact 1-8 and the fuse base, a second compression spring 2-2 is arranged on the fuse barrel between the lower moving contact 2-4 and the pull rod sleeve 2-1, and the fuse 2-3 pulls the second compression spring 2-2 into a compressed state. In this embodiment, a copper threaded sleeve 2-7 and an insulating positioning sleeve 2-6 are also arranged at the lower end of the upper moving contact 2-8.

[0031] The outer part of the lower contact 1-5 is also tightly bound with an annular spring to ensure that after the fuse barrel 2 is installed in place, the lower contact 1-5 is in full line contact with the fuse barrel 2-4 for electrical conduction.

[0032] The drop-out fuse structure consists of two parts: a fuse base and a fuse barrel. A transparent glass cover 1-7 is installed on the fuse base 1 to ensure that the position of the fuse barrel 2 can be clearly seen after the fuse barrel 2 fails and falls off; at the same time, in order to improve the sealing, after the inlet and outlet cables are installed, the reserved process holes 1-10 need to be sealed with silicone; and the fuse barrel 2 is placed inside the semi-enclosed transparent glass cover 1-7 of the fuse base to ensure that external rain will not affect the normal operation of the fuse. When the fuse fails, the fuse barrel 2 is under the action of the second compression spring 2-2, and the fuse barrel 2-5 falls off downward, so that the fuse barrel can be observed from both sides.

[0033] If the words "first", "second" and so on are used in this patent to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the utility model and simplifying the description, and the above words have no special meaning.

[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

[0035] In the description of the present invention, it is necessary to understand that the terms "front", "rear", "left", "right", "center", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the protection content of the present invention.

Claims

1. An outdoor fully insulated drop-out fuse structure, characterized in that: It includes a fuse base and a fuse core tube installed on the fuse base, and the fuse base is provided with an incoming cable, an outgoing cable and a transparent glass cover for observation; An upper contact connected to the incoming cable is provided on the fuse base located above the transparent glass cover, and a lower contact connected to the outgoing cable is provided on the fuse base located below the transparent glass cover; During assembly, the fuse core barrel is arranged in the fuse base and passes through the transparent glass cover, and the upper moving contact of the fuse core barrel abuts against the upper contact for conduction, and the lower moving contact of the fuse core barrel contacts with the lower contact for conduction.

2. The outdoor fully insulated drop-out fuse structure according to claim 1, characterized in that: The fuse core barrel also includes a fuse barrel and a pull rod sleeve arranged at the end of the fuse barrel, the upper moving contact is fixedly arranged on the upper end of the fuse barrel, the lower moving contact is movably sleeved on the fuse barrel and one end of the fuse is fixedly arranged on its side wall, and the other end of the fuse is arranged on the fuse barrel above the pull rod sleeve.

3. The outdoor fully insulated drop-out fuse structure according to claim 2 is characterized in that: A first compression spring is arranged between the upper part of the upper contact and the fuse base, a second compression spring is arranged on the fuse barrel between the lower moving contact and the pull rod sleeve, and the fuse pulls the lower second compression spring to be in a compressed state.

4. The outdoor fully insulated drop-out fuse structure according to claim 1 is characterized in that: An annular spring is also tightly bound on the outside of the lower contact.

5. The outdoor fully insulated drop-out fuse structure according to claim 1 is characterized in that: The fuse base is a vertically arranged U-shaped seat, and the U-shaped seat includes an upper edge portion and a lower edge portion which are extended outwardly, and a protective sleeve is fixed at the lower end of the lower edge portion, and a guide hole extending outward from top to bottom is opened inside the protective sleeve.

6. The outdoor fully insulated drop-out fuse structure according to claim 5, characterized in that: The lower contact is arranged in the central hole of the lower edge portion and is located above the protective sleeve.

7. The outdoor fully insulated drop-out fuse structure according to claim 5, characterized in that: A guide sleeve is also fixedly mounted on the lower end of the transparent glass cover.

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