CN218867027U - Novel totally closed high pressure jet type fuse - Google Patents

Abstract

The utility model discloses a novel totally closed high pressure injection type fuse relates to electric power system application equipment field. The outgoing lines at the upper end and the lower end of the porcelain insulator body of the utility model all adopt the conical sealing heads which are formed in one step, and the bottom opening end is provided with the sealing cover, thereby realizing the whole fully-insulated and fully-sealed structure of the fuse, avoiding dust and salt pollution inside the fuse, avoiding the power line fault caused by the reduction of the insulation resistance, ensuring the long-term effective operation of the fuse, and ensuring more stable and reliable performance; when the fuse is completely installed in place, the spring of the upper electrode and the spring below the lower contact are in a compressed energy storage state, the arc discharge time is reduced during fusing, the service life of an arc extinguishing tube is prolonged, meanwhile, the fuse carrier is buffered, and the protection reliability of the fuse is greatly improved; the sealing cover at the lower end of the fuse effectively prevents the fuse carrier from popping up to hurt people, the safety of the whole equipment is higher, and the fuse carrier is suitable for large-scale popularization and application.

Description

Novel totally closed high pressure jet type fuse

Technical Field

The utility model relates to an electric power system application equipment field, specific novel totally closed high-pressure injection formula fuse that says so.

Background

A Fuse (british name Fuse) is a kind of circuit protection device that fuses a melt by heat generated by itself to open a circuit when a current exceeds a predetermined value. The method is mainly used for an indoor alternating current 10-40.5kv and 50HZ power system. At present, high-voltage fuses are divided into jet fuses and current-limiting fuses, arc extinguishing media of the jet fuses are different from arc extinguishing media of the current-limiting fuses, and the arc extinguishing media of the jet fuses are air. When the fuse protector exceeds the specified value for a period of time through overload or short-circuit current, the fuse body generates heat until the fuse protector melts, so that the circuit is disconnected, and the damage of the overload or short-circuit current to the whole circuit is reduced by the protection circuit. When the fuse tube normally works, the fuse wire enables the movable part on the fuse tube to be locked, so the fuse tube can be in a closing state under the pressure of the upper contact. When the fuse is fused, an electric arc is generated in the fuse tube, a large amount of gas is decomposed from the fuse tube lining and the fuse part gas production tube under the action of the electric arc, a strong dissociation effect is generated when the current passes zero, the electric arc is extinguished, and then an obvious segmental gap is formed under the action of the elastic force and the self weight of the upper contact and the lower contact due to the fusing of the fuse.

The drop out fuse is installed mostly in the open air now, in the open air, the fuse is generally settled in the high altitude, though the fuse-tube volume is less relatively, nevertheless fall from the high altitude, the impact force is bigger, pound the man-hour, also can cause the injury of certain degree, the drop out fuse that uses at present is non-all insulation construction moreover, the lightning-fast level is very low, be the weak link of line equipment lightning protection, and long-term outdoor operation, receive the influence that the wind blows and drenches and environmental pollution, the easy oxidation corrosion of firmware, can lead to the fault rate to increase.

Disclosure of Invention

For solving the technical problem that above-mentioned exists, the utility model provides a novel totally closed high pressure sprays formula fuse, the structural sealing nature is good, avoids inside stained, ensures the effective long-term operation of equipment to the fusion tube falls and can not cause the injury to the people, and the performance is more reliable, and the security is higher.

In order to achieve the above purpose, the utility model adopts the technical proposal that:

the utility model provides a novel totally closed high pressure injection formula fuse, includes porcelain insulator body, carries fuse and fuse-element, the upper portion of insulator body sets up insulating lead-out wire, lower part and sets up insulating lead-out wire down, the inside cavity of porcelain insulator body, the inside conducting element that sets up of cavity, and the bottom sets up the opening, is equipped with fuse-element's year fuse-element switch-on circuit through inserting, the port of going up insulating lead-out wire and insulating lead-out wire down all is provided with the sealed head of one shot forming's toper, and bottom opening part sets up sealed lid, the fuse-element's fuse-element upper end sets up contact, middle part sets up gliding lower contact from top to bottom, the lower contact below sets up around locating the outside spring of fuse-element, the fuse-element bottom sets up red reflection of light indicator cap, when fuse-element packs into and carries fuse-element, the top electric arc of fuse-element contracts the pole and is connected with last contact, the lower extreme of fuse-element passes through flexible conductor and lower contact is connected.

The porcelain insulator is characterized in that an electric arc protective pipe is arranged in the porcelain insulator body and is made of high-temperature-resistant materials.

The middle part of the sealing cover is provided with a through hole for inserting a melt-carrying piece, and the sealing part is provided with a plurality of petal structures which are equally divided.

The conical sealing head and the sealing cover are made of insulating rubber.

The outside staple bolt that sets up of intermediate position of porcelain insulator body, the staple bolt is detachable construction for adjust the outlet position.

The upper and lower end lead-out wires of the porcelain insulator body of the utility model all adopt one-step formed conical sealing heads, and the bottom opening end is provided with a sealing cover, thus realizing the whole fully-insulated and fully-sealed structure of the fuse, avoiding dust and salt pollution inside the fuse, avoiding power line faults caused by the reduction of insulation resistance, ensuring the long-term effective operation of the fuse and ensuring more stable and reliable performance; when the fuse is completely installed in place, the spring of the upper electrode and the spring below the lower contact are in a compressed energy storage state, the arc discharge time is reduced during fusing, the service life of an arc extinguishing tube is prolonged, meanwhile, the fuse carrier is buffered, and the protection reliability of the fuse is greatly improved; the sealing cover at the lower end of the fuse effectively prevents the fuse carrier from popping up to hurt people, the safety of the whole equipment is higher, and the fuse carrier is suitable for large-scale popularization and application.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the fuse carrier 2 of the present invention;

fig. 3 is a schematic structural view of the fuse element 3 of the present invention;

fig. 4 is a schematic structural view of the sealing cap of the present invention.

Detailed Description

The invention is described in detail below with reference to the following figures and specific embodiments:

as shown in fig. 1-4, a novel totally-enclosed high-voltage injection type fuse includes a porcelain insulator body 1, a fuse carrier 2 and a fuse element 3, an upper insulating outgoing line 11 is arranged on the upper portion of the insulator body 1, a lower insulating outgoing line 12 is arranged on the lower portion of the insulator body, the porcelain insulator body 1 is hollow, a conductive element is arranged in the hollow portion, an opening is arranged at the bottom of the hollow portion, a fuse carrier 2 conduction circuit with the fuse element 3 is inserted, one-step-shaped tapered sealing heads are arranged at ports of the upper insulating outgoing line 11 and the lower insulating outgoing line 12, a sealing cover 14 is arranged at the opening portion at the bottom of the hollow portion, an upper contact 21 is arranged at the upper end of a fuse tube 23 with the middle portion provided with a lower contact 22 capable of sliding up and down, a spring 24 wound outside the fuse tube 23 is arranged below the lower contact 22, a red reflective indication cap 25 is arranged at the bottom of the fuse tube 23, when the fuse element 3 is loaded into the fuse carrier 2, a top arc shortening rod 31 of the fuse element 3 is in contact connection with the upper contact 21, and a lower end of the fuse element is in contact with the lower contact 22 through a soft wire 34.

Preferably, in this embodiment, an arc protection tube 17 is disposed in the porcelain insulator body 1, and the arc protection tube 17 is made of a high-temperature resistant material, has flame retardancy, and has high explosion strength.

Preferably, the sealing cover 14 has a through hole in the middle for inserting the fuse carrier 2, and a plurality of petals equally divided at the sealing position, and in this embodiment, the sealing position is composed of 8 petals equally divided, so that good sealing performance is ensured.

Preferably, the conical sealing head and the sealing cover 14 are made of insulating rubber, and in this embodiment, ethylene propylene insulating rubber is used.

As a preferred mode, the hoop 19 is arranged outside the middle position of the porcelain insulator body 1, and the hoop 19 is of a detachable structure and is used for adjusting the position of the wire outlet.

In this embodiment, the upper electrode 15 of the porcelain insulator body 1 has a specific structure that the conductive screw is connected with the contact plate through a flexible conductor, and the other end of the conductive screw is pressed with a spring to provide the opening elastic force. The lower electrode 16 consists of a lower contact finger, a copper plate and a fixed sleeve, and the copper plate and the lower contact finger are tightly pressed through a rivet. The interior of the fuse carrier 2 is of a central through tubular structure, the upper end of a fuse tube 23 is provided with an upper contact 21, the middle part of the fuse tube is provided with a lower contact 22 capable of sliding up and down, and a spring 24 and a red light-reflecting indicating cap 25 for storing energy are arranged below the lower contact 22. The fusion tube 23 is made of alkali-free glass fiber, and the inner surface of the fusion tube is provided with a gas production material layer which is made of high-temperature volatile material. The electric arc shortening rod 31 at the upper end of the fuse-link 3 forms a button cap head through cold heading, the fusant 32 is made of silver alloy, the conductivity is good, the temperature rise is low, the energy consumption is low, and the gas production paper tube 33 is sleeved outside the fusant 32.

The utility model discloses in the installation, at first pack fuse-element 3 into and carry fuse-element 2, the upper end electric arc of fuse-element 3 shortens pole 31 and connects upper contact 21 and compresses tightly in upper contact 21 through the button cap head, will descend contact 22 to pull to the lower extreme position, with fuse-element 32 end of fuse-element 3 through flexible conductor 3 crimping to lower contact 22 on, make lower contact 22 at lower extreme position, spring 24 is compressed energy storage. Then, the fuse carrying part 2 is arranged in the porcelain insulator body 1, the rest upper contact 21 of the upper electrode 15 is contacted, meanwhile, a spring arranged in the upper electrode 15 is compressed to store energy, and the lower electrode 16 is tightly clamped with the lower contact 22, so that the fuse carrying part 2 is prevented from falling off, and good contact is ensured.

When the fuse element 3 passes through overload current or short-circuit current, the melt 32 is heated until being melted, an electric arc is generated, a large amount of gas is instantly generated by the ionization gas-generating paper tube 33 to blow out the electric arc, meanwhile, the spring of the upper electrode 15 and the spring 24 below the lower contact 22 work together, the fuse tube 23 is rapidly flicked down to form an effective port, and the red light-reflecting indicating cap 25 at the lower end of the fuse element 2 extends out of the fuse to give a signal.

Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.

Claims (5)

1. The utility model provides a novel totally closed high pressure injection formula fuse, includes porcelain insulator body (1), carries fuse (2) and fuse (3), the upper portion of insulator body (1) sets up insulating leading-out wire (11), lower part sets up down insulating leading-out wire (12), porcelain insulator body (1) inside cavity, the inside conducting element that sets up of cavity, the bottom sets up the opening, carries fuse (2) switch on circuit that fuse (3) is equipped with through the insertion, a serial communication port, the port of going up insulating leading-out wire (11) and lower insulating leading-out wire (12) all is provided with one shot forming's toper sealing head, and bottom opening part sets up sealed lid (14), fuse (23) upper end that carries fuse (2) sets up contact (21), middle part sets up gliding lower contact (22) from top to bottom, contact (22) below sets up around spring (24) of locating fuse (23) outside, fuse (23) bottom sets up red reflection of light and indicates cap (25), when fuse (3) were packed into fuse, the fuse (3) the contact is connected with short circuit fuse-bar (31) and contact (32) lower extreme (31).

2. A novel fully-enclosed high-voltage expulsion fuse according to claim 1, characterized in that an arc protection tube (17) is arranged in said porcelain insulator body (1), said arc protection tube (17) being made of a high-temperature resistant material.

3. A novel totally enclosed high pressure ejection fuse according to claim 1, characterized in that the sealing cover (14) is provided with a through hole in the middle for inserting the fuse carrier (2), and the sealing part is provided with a plurality of petal structures equally divided.

4. A novel totally enclosed high pressure expulsion fuse as claimed in claim 1 wherein said conical sealing head and sealing cap (14) are both of insulating rubber.

5. The novel totally-enclosed high-voltage expulsion fuse as claimed in claim 1, wherein an anchor ear (19) is provided outside the middle position of the porcelain insulator body (1), and the anchor ear (19) is of a detachable structure and is used for adjusting the position of an outlet.

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