CN111211025A

CN111211025A - Electric safety arc-extinguishing drop-out fuse

Info

Publication number: CN111211025A
Application number: CN201811390126.9A
Authority: CN
Inventors: 陈振坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-11-21
Filing date: 2018-11-21
Publication date: 2020-05-29

Abstract

The invention relates to an electric safety arc-extinguishing drop-out fuse.A high-voltage wiring terminal is electrically connected with one end of a fuse tube, a moving contact is fixedly connected with the other end of the fuse tube, a fixed seat is arranged below a high-voltage porcelain pot, one end of a swing arm is fixedly connected with a swing frame, the swing frame and the fuse tube are both hinged on the fixed seat through a pin shaft, the swing frame is in a U-shaped structure, one side of the swing frame is provided with an integrally-formed lug, the end part of the lug is hinged with one end of a push-pull rod, the other end of the push-pull rod is connected with a driving mechanism, the driving mechanism comprises a driving motor; the arc extinguishing chamber is arranged on the mounting plate, the moving contact is connected with a contact piece, and the end part of the contact piece is arranged in the arc extinguishing chamber in a closed state. The electric safe arc-extinguishing drop-out fuse is reasonable and simple in structural design, and the overall stability of the fuse is enhanced by coaxially arranging the swing arm and the fuse tube and adopting the columnar toothed bar as the driving mechanism; meanwhile, an arc extinguishing cover is arranged, so that potential safety hazards are eliminated, and the service life is prolonged.

Description

Electric safety arc-extinguishing drop-out fuse

Technical Field

The invention relates to the technical field of high-voltage protection electric appliances, in particular to an electric safety arc-extinguishing drop-out fuse.

Background

The fuse is an overcurrent protection electrical appliance. The protector is widely applied to high-low voltage distribution systems, control systems and electric equipment and is used as a short-circuit or overcurrent protector. When the current exceeds the specified value, the melt is fused by the heat generated by itself, and the circuit is disconnected. The electric safety arc-extinguishing drop-out fuse is an outdoor high-voltage protector, is assembled on the high-voltage side of a distribution transformer or a distribution line branch line, is used for short circuit and overload protection of the transformer and the line and switching on and off of a coincidence current, and is connected in series in a protected circuit.

Electronic safe arc extinguishing drop out fuse mainly comprises fuse-link, vase, swing arm and actuating mechanism, has the problem:

1. the existing driving mechanism adopts a square frame annular rack, has a complex structure, is poor in stability during operation and is easy to loosen;

2. meanwhile, the arc extinguishing function is not provided, and potential safety hazards exist;

3. the rotation strong point of current fuse-link and swing arm is each (axle I400 and axle II 500) from independent, not on same axis, so there is the stroke difference when opening and close between swing arm and the fuse-link, in order to cooperate this stroke difference, protruding 200 cooperatees on two L type ears 100 of welding and the fuse-link on the swing arm, be equipped with the poor surplus of motion stroke when opening and close apart from space 300 between L type ear 100 and the arch 200, structural connection is complicated between swing arm and the fuse-link in addition, this structural design is complicated, the whole weight of swing arm and fuse-link has been increased, poor stability during the drive, the cost of manufacture is high, influence life.

Disclosure of Invention

Aiming at the defects in the background technology, the invention provides an electric safe arc-extinguishing drop-out fuse and overcomes the defects.

The technical scheme adopted by the invention for solving the technical problems is as follows:

an electric safety arc-extinguishing drop-out fuse comprises a high-voltage porcelain pot, a fuse tube, a push-pull rod, a swing arm, a fixed plate and a mounting plate, wherein one end of the fuse tube is electrically connected with a high-voltage wiring terminal, the other end of the fuse tube is fixedly connected with a moving contact, a fixed seat is arranged below the high-voltage porcelain pot, one end of the swing arm is fixedly connected with a swing frame, the swing frame and the fuse tube are respectively hinged to the fixed seat through a pin shaft or two independent shafts arranged on the same axis, the swing frame is in a U-shaped structure, one side of the swing frame is provided with an integrally-formed lug, the end part of the lug is hinged to one end of the push-pull rod, the other end of the push-pull rod is connected with a driving mechanism, the driving mechanism comprises a driving; the arc extinguishing chamber is arranged on the mounting plate, the moving contact is connected with a contact piece, and the end part of the contact piece is arranged in the arc extinguishing chamber in a closed state.

The fuse tube is provided with a push-pull ring and a connecting block with an arc groove, the other end of the swing arm is provided with a hook, and the hook is hung in the push-pull ring.

The driving motor is connected with a gear meshed with the columnar toothed bar, the driving motor is installed on the fixing plate, the columnar toothed bar is fixed on the surface of the fixing plate through two limiting clamps, the driving motor is fixed on the other surface of the fixing plate, and the columnar toothed bar is driven to move through the gear.

The movable mechanism comprises a fixed end provided with a spherical groove and a movable end with a sphere, and the fixed end and the movable end are connected with the push-pull rod and the columnar toothed rod through threads; the ball is arranged in the spherical groove and can move freely, and the spherical groove wraps 2/3-4/5 of the surface area of the ball.

The arc extinguishing cover comprises two clamping pieces, outward folded edges are arranged on the two clamping pieces, the clamping pieces are made of engineering plastics, and reinforcing ribs are arranged on the outer walls of the clamping pieces.

By adopting the technical scheme, the problems of complex structure, poor stability and potential safety hazard of the conventional fuse are effectively solved, the electric safe arc-extinguishing drop-out fuse is reasonable and simple in structural design, and the overall stability of the fuse is enhanced by coaxially arranging the swing arm and the fuse tube and adopting the columnar toothed bar as the driving mechanism; meanwhile, an arc extinguishing cover is arranged, so that potential safety hazards are eliminated, and the service life is prolonged.

Drawings

Fig. 1 is a schematic view of an installation structure of a fuse tube and a swing arm in the background art of the present invention.

In the figure 1, a high-voltage porcelain pot; 2. fusing the tube; 21. a pull ring is pushed; 3. a push-pull rod; 4. swinging arms; 41. placing a frame; 42. a tab; 43. hooking; 5. a moving contact; 51. a pin shaft; 6. a fixing plate; 7. a fixed seat; 8. connecting blocks; 81. an arc-shaped groove; 9. a drive mechanism; 91. a columnar rack bar; 92. a gear; 93. a limiting card; 10. a movable mechanism; 101. a fixed end; 102. a movable end; 11. mounting a plate; 12. an arc extinguishing chamber; 121. folding edges; 13. a contact piece.

Detailed Description

Referring to fig. 1, the present invention: an electric safe arc-extinguishing drop-out fuse comprises a high-voltage porcelain pot 1, a fuse tube 2, a push-pull rod 3, a swing arm 4, a fixed plate 6 and a mounting plate 11, wherein one end of the fuse tube 2 is electrically connected with a high-voltage wiring terminal, the other end of the fuse tube is fixedly connected with a moving contact 5, a fixed seat 7 is arranged below the high-voltage porcelain pot 1, one end of the swing arm 4 is fixedly connected with a swing frame 41, the swing frame 41 and the fuse tube 2 are both hinged to the fixed seat 7 through a pin shaft 51 or two independent shafts arranged on the same axis respectively, so that stroke difference is eliminated, and a distance space 300 in a figure 1 is eliminated in the opening and closing process. The swing frame 41 is in a U-shaped structure, one side of the swing frame is provided with an integrally formed lug 42, the end part of the lug 42 is hinged with one end of the push-pull rod 3, the other end of the push-pull rod 3 is connected with a driving mechanism 9, the driving mechanism comprises a driving motor and a columnar toothed rod 91, and the columnar toothed rod 91 is connected with the push-pull rod 3 through a movable mechanism 10; the arc extinguishing chamber 12 is installed on the mounting plate 11, the movable contact 5 is connected with the contact piece 13, the end part of the contact piece 13 is arranged in the arc extinguishing chamber 12 in a closed state, the contact piece 13 is arranged in a sheet L shape, open fire generated in high-voltage power failure is avoided, the movable contact or other parts are not damaged, the service life is prolonged, fire hazards are avoided simultaneously, and the safety is high.

The fuse tube 2 is provided with a push-pull ring 21 and a connecting block 8 with an arc-shaped groove 81, the fuse tube 2 is of a cylindrical structure, when the fuse tube 2 is closed, the fuse tube 2 is arranged in the arc-shaped groove 81, the swing arm 4 pushes the fuse tube 2 to move upwards through the connecting block 6, the other end of the swing arm 4 is provided with a hook 43, the hook 43 is hung in the push-pull ring 21, and when the fuse tube 2 is disconnected, the swing arm 4 pulls the fuse tube 2 to rotate around 51 with the hook 43, so that disconnection is realized.

The driving motor is connected with a gear 92 engaged with the columnar rack bar 91, the driving motor is installed on the fixing plate 6, the columnar rack bar 91 is fixed on the surface of the fixing plate 6 through two limiting clamps 93, the driving motor is fixed on the other surface of the fixing plate 6, and the gear 92 drives the columnar rack bar 91 to move. Preferably, driving motor can connect remote control system, avoids the potential safety hazard that personnel are close to, and is practical convenient.

The movable mechanism 10 comprises a fixed end 101 provided with a spherical groove and a movable end 102 provided with a sphere, and the fixed end 101 and the movable end 102 are connected with the push-pull rod 3 and the columnar toothed rod 91 through threads; the ball is arranged in the spherical groove and can move freely, and the spherical groove wraps 2/3-4/5 of the surface area of the ball. The sphere can move freely in the spherical groove, the circumferential offset angle of the movable end 102 relative to the fixed end 101 is within 25 degrees, and the columnar toothed rod 91 and the push-pull rod 3 are basically in the same straight line during driving, the driving stroke is not influenced, and the spherical ball is flexible to use and has long service life on the premise of high overall stability

The arc extinguishing chamber 12 comprises two clamping pieces, wherein the two clamping pieces are provided with outward folded edges 121, the clamping pieces are made of engineering plastics, the outer walls of the clamping pieces are provided with reinforcing ribs, the reinforcing ribs play a role in reinforcing the stability of the arc extinguishing chamber 12, and meanwhile, the arc extinguishing chamber has a heat dissipation effect, timely dissipates heat generated by arc extinguishing, and the service life of the arc extinguishing chamber is prolonged.

The operation principle is as follows: the driving motor drives the columnar toothed rod 91 to drive the push-pull rod 3, the push-pull rod 3 drives the fuse tube 2 to rotate around the pin shaft 51 or two independent shafts arranged on the same axis through the hook 43, and meanwhile, the contact piece 13 is far away from the arc extinguishing chamber 12 along with the fuse tube 2, so that the disconnection operation of the fuse is realized; when the fuse protector needs to be closed, the motor drives the push-pull rod 3 to move in the direction close to the high-voltage porcelain pot 1 through the columnar toothed rod 91, the push-pull rod 3 pushes the fuse tube 2 through the connecting block 8 to rotate around the pin shaft 51 or two independent shafts arranged on the same axis respectively until the movable contact 5 is combined with the fixed contact, and meanwhile, the contact piece 13 enters the arc extinguishing chamber 12 from the folded edge 121, so that the closing operation of the fuse protector is realized.

The electric safe arc-extinguishing drop-out fuse effectively solves the problems of complex structure, poor stability and potential safety hazard of the conventional fuse, is reasonable and simple in structural design, and has enhanced overall stability by coaxially arranging the swing arm 4 and the fuse tube 2 and adopting the columnar toothed bar 91 as the driving mechanism; meanwhile, the arc extinguishing cover 12 is arranged, so that potential safety hazards are eliminated, and the service life is prolonged.

The skilled person should understand that: although the invention has been described in terms of the above specific embodiments, the inventive concept is not limited thereto and any modification applying the inventive concept is intended to be included within the scope of the patent claims.

Claims

1. The utility model provides an electronic safe arc extinguishing drop out fuse, includes high-pressure porcelain pot (1), fuse tube (2), push-and-pull rod (3), swing arm (4), fixed plate (6) and mounting panel (11), high voltage wiring terminal is connected to fuse tube (2) one end electricity, other end fixed connection moving contact (5), its characterized in that: a fixing seat (7) is arranged below the high-pressure porcelain pot (1), one end of the swing arm (4) is fixedly connected with a swing frame (41), the swing frame (41) and the fuse tube (2) are both hinged to the fixing seat (7) through a pin shaft (51) or two independent shafts arranged on the same axis, the swing frame (41) is of a U-shaped structure, one side of the swing frame is provided with an integrally-formed lug (42), the end part of the lug (42) is hinged to one end of the push-pull rod (3), the other end of the push-pull rod (3) is connected with a driving mechanism (9), the driving mechanism comprises a driving motor and a columnar toothed rod (91), and the columnar toothed rod (91) is connected with the push-pull rod (3) through a movable mechanism (10); the arc extinguishing chamber (12) is arranged on the mounting plate (11), the moving contact (5) is connected with a contact piece (13), and the end part of the contact piece (13) is arranged in the arc extinguishing chamber (12) in a closed state.

2. An electrically operated safety arc extinguishing drop type fuse according to claim 1, wherein: the fuse tube (2) is provided with a push-pull ring (21) and a connecting block (8) with an arc-shaped groove (81), the other end of the swing arm (4) is provided with a hook (43), and the hook (43) is hung in the push-pull ring (21).

3. An electrically operated safety arc extinguishing drop type fuse according to claim 1, wherein: the driving motor is connected with a gear (92) meshed with the columnar toothed bar (91), the driving motor is installed on the fixing plate (6), the columnar toothed bar (91) is fixed on the surface of the fixing plate (6) through two limiting clamps (93), the driving motor is fixed on the other surface of the fixing plate (6), and the columnar toothed bar (91) is driven to move through the gear (92).