CN209561112U - The explosion-proof wirewound resistor of high anti-lightning low current fusing - Google Patents

Abstract

The utility model gives a kind of explosion-proof wirewound resistor of high anti-lightning low current fusing, including porcelain stick, alloy wire, two conducting wires and two caps, two caps are pressed together on porcelain stick both ends respectively, alloy wire is wound on porcelain stick side wall, it is welded respectively with two caps at alloy wire both ends, two conducting wires are respectively welded on two caps, and porcelain stick and cap outer application have insulating lacquer layer；Porcelain stick side wall is provided with fusing slot, is wound on the alloy wire on porcelain stick side wall by the aperture position of fusing slot, fusing slot memory is placed with easy burning coating material.Circuit is in case of short circuit, this wirewound resistor is by big energy load, alloy wire is generated heat rapidly, and after the heat of alloy wire reaches certain numerical value, the easy burning coating material to fuse in slot explodes, the explosive range very little of easy burning coating material, and it only fuses to by the alloy wire at fusing channel opening, causes this wirewound resistor to fail, avoid alloy wire from integrally generating heat and burst, the release for reducing energy, avoids causing security risk.

Description

The explosion-proof wirewound resistor of high anti-lightning low current fusing

Technical field

The utility model relates to a kind of explosion-proof wirewound resistors of high anti-lightning low current fusing.

Background technique

Wire-wound resistor, wire resistor, which is primarily adapted for use in the AC-DC Circuits such as precision instrument, telecommunication equipment, electronic equipment, to be made Partial pressure, decompression, shunting and load resistance are used, and when short circuit occurs, wire-wound resistor receives biggish energy load, line to available circuit Alloy wire inside resistance is integrally generated heat, and is burst until whole, burst when discharge amount of heat, external equipment is caused hidden Suffer from.

Utility model content

The technical problem to be solved by the utility model is to provide a kind of structures simply, the low electricity of high anti-lightning of safety anti-explosive The explosion-proof wirewound resistor of stream fusing.

In order to solve the above technical problems, the utility model provides a kind of explosion-proof wire-wound resistor of high anti-lightning low current fusing Device, including porcelain stick, alloy wire, two conducting wires and two caps, two caps are pressed together on porcelain stick both ends, alloy wire coiling respectively On porcelain stick side wall, alloy wire both ends are welded with two caps respectively, and two conducting wires are respectively welded on two caps, porcelain stick with Cap outer application has insulating lacquer layer；

Porcelain stick side wall is provided with fusing slot, is wound on the alloy wire on porcelain stick side wall by the aperture position of fusing slot, fusing Slot memory is placed with easy burning coating material.

With such a structure, circuit is in case of short circuit, and for this wirewound resistor by big energy load, alloy wire is fast Speed fever, after the heat of alloy wire reaches certain numerical value, the easy burning coating material explosion to fuse in slot, the explosive range of easy burning coating material is very It is small, and only fuse to by the alloy wire at fusing channel opening, it causes this wirewound resistor to fail, alloy wire is avoided integrally to send out Thermal breakage reduces the release of energy, avoids causing security risk.

For the clearer technology contents for understanding the utility model, below by this high anti-lightning low current fusing explosion-proof line This wirewound resistor is referred to as around resistor.

The fusing slot of this wirewound resistor extends in porcelain stick circumferential direction, and projection of shape of the fusing slot in porcelain stick section is ring Shape；With such a structure, alloy wire must travel fusing slot in coiling, avoid avoiding melting when alloy wire coiling when assembly Fault trough opening, cannot at the first time be fused alloy wire by easy burning coating material when short circuit occurs for circuit.

Insulated paint covering is enclosed on the outside of the alloy wire of this wirewound resistor.

The easy burning coating material of this wirewound resistor is black powder；After such coating, it can guarantee alloy wire fever When reaching certain temperature, the energy of easy burning coating material explosion can fuse alloy wire, and the power of easy burning coating material explosion can be allowed only to limit In fusing alloy wire, avoids involving outside, cause other security risks.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of this wirewound resistor embodiment.

Fig. 2 is the schematic diagram of this wirewound resistor embodiment porcelain stick.

Specific embodiment

(for the clearer structure through this wirewound resistor, porcelain stick and cap is omitted in Fig. 1 as shown in Fig. 1 to 2 The insulating lacquer layer in outside).

This wirewound resistor includes porcelain stick 1,5, two conducting wires 4 of alloy wire and two caps 3.

Porcelain stick 1 uses 50% porcelain stick 1 of aluminum content, specification 2*7.5mm, and 1 side wall of porcelain stick middle part is provided with fusing slot 11, fusing Slot 11 extends in 1 circumferential direction of porcelain stick, and projection of shape of the fusing slot 11 in 1 section of porcelain stick is annular, and fusing 11 memory of slot is placed with Easy burning coating material 2.

Easy burning coating material 2 is the black powder of commercially available fireworks and firecrackers.

The material of cap 3 is irony, and it is highly 1.90mm, with a thickness of 0.25mm, conducting wire 4 is adopted that specification internal diameter, which is 2.46mm, With tinned wird, line footpath 0.6mm, length 25mm, alloy wire 5 has insulating layer (i.e. enameled wire) outside, the diameter of alloy wire 5 For 0.07mm.

Two caps 3 are pressed together on 1 both ends of porcelain stick respectively, and alloy wire 5 is wound on 1 side wall of porcelain stick by automatic winding equipment On, 5 both ends of alloy wire are welded with two caps 3 respectively, and two conducting wires 4 are respectively welded on two caps 3, are wound on porcelain stick 1 Aperture position of the alloy wire 5 by fusing slot 11 on side wall, the insulation of porcelain stick 1 and 3 eight layers of special operation of outer application of cap Paint layer (not shown).

When this wirewound resistor normal use, circuit is closed in case of short circuit, this wirewound resistor by big energy load Spun gold 5 generates heat rapidly, and after the heat of alloy wire 5 reaches certain numerical value, the easy burning coating material 2 to fuse in slot 11 is burst, easy burning coating material 2 Explosive range very little, to by fusing 11 opening of slot alloy wire 5 fuse, cause this wirewound resistor fail, avoid closing The whole fever of spun gold 5 is burst, and is reduced the release of energy, is realized explosion-proof effect.

Above-described is only a kind of embodiment of the utility model, it is noted that for the ordinary skill of this field For personnel, without departing from the principle of this utility model, several variations and modifications can also be made, these also should be regarded as Belong to the protection scope of the utility model.

Claims (4)

1. Explosion-proof wirewound resistor, including porcelain stick, alloy wire, two conducting wires and two caps 1. a kind of high anti-lightning low current fuses Lid, two caps are pressed together on porcelain stick both ends respectively, and alloy wire is wound on porcelain stick side wall, alloy wire both ends respectively with two caps Lid welding, two conducting wires are respectively welded on two caps, and porcelain stick and cap outer application have insulating lacquer layer；

   It is characterized in that:

   Porcelain stick side wall is provided with fusing slot, is wound on the alloy wire on porcelain stick side wall by the aperture position of fusing slot, fuses in slot Storage has easy burning coating material.
2. The explosion-proof wirewound resistor 2. high anti-lightning low current according to claim 1 fuses, it is characterized in that:

   The fusing slot extends in porcelain stick circumferential direction, and projection of shape of the fusing slot in porcelain stick section is annular.
3. The explosion-proof wirewound resistor 3. high anti-lightning low current according to claim 1 fuses, it is characterized in that:

   Insulated paint covering is enclosed on the outside of alloy wire.
4. The explosion-proof wirewound resistor 4. high anti-lightning low current according to claim 1 fuses, it is characterized in that:

   The easy burning coating material is black powder.