CN219873311U - Quick cutting device and instantaneous cut-off circuit breaker - Google Patents

Abstract

The utility model discloses a quick cutting device and an instantaneous cutting-off circuit breaker, wherein the cutting device comprises a base body part, a cutter and an igniter, wherein a sealed cavity is arranged on the base body part, and gas generating medicines are contained in the sealed cavity; the cutter is made of insulating materials and is fixedly connected to the outer wall of the base body part; the igniter is arranged in the sealed chamber and is used for detonating the gas generating medicine; when the ignition tool detonates the gas-generating medicine, the cutting device can integrally move relative to the device to be cut under the action of high-pressure gas so as to realize the cutting operation of the cutter on the device to be cut. The instantaneous cutting-off circuit breaker is provided with the cutting-off device, the cutting-off device is arranged in the cutting-off working chamber and can move relative to the conductive copper bar under the action of high-pressure gas so as to enable the cutter to cut off the conductive copper bar; the part of the conductive copper bar cut off by the cutter falls into the arc extinguishing chamber. The cutting device has the characteristics of quick response time, quick moving speed and the like, and improves the protection effect of the circuit breaker on the circuit, so that the cutting device can be well applied to high-precision products.

Description

Quick cutting device and instantaneous cut-off circuit breaker

Technical Field

The utility model relates to the technical field of circuit protection, in particular to a quick cutting device and an instantaneous cut-off circuit breaker manufactured by using the same.

Background

A fuse (also called a circuit breaker) is an electric appliance that uses a metal conductor as a melt to be connected in series in a circuit, and when an overload or short-circuit current passes through the melt, it melts due to its own heat, thereby breaking the circuit. The fuse has simple structure and convenient use, and is widely used as a protection device in power systems, various electrical equipment and household appliances.

The most widely used fuse in the market at present is an initiating explosive device fuse. The working principle of the initiating explosive device fuse is as follows: the initiating explosive device fuse is connected in series in the loop, and when the circuit is normal, current can flow through the conductive copper bar; when short circuit occurs, the initiating explosive device (igniter) receives an ignition signal and is detonated to generate high temperature and high pressure, the insulating cutter is pushed to move towards the conductive copper bar to cut off the conductive copper bar, and an electric arc generated by the conductive copper bar in the cutting process can enter an arc extinguishing chamber to be absorbed by energy and cooled, so that the circuit breaking work is finally completed.

However, there are some disadvantages to the initiating explosive device fuses in the prior art, such as: the response time of the impact energy effect of the gunpowder in the initiating explosive device is generally kept between a few milliseconds and ten milliseconds, namely the sensitivity of the initiating explosive device (the initiating explosive device) is not ideal, so that the time for the initiating explosive device to detonate the gunpowder and then drive the insulating cutter to move towards the conductive copper bar is long from the receiving of the ignition signal, and the fuse cannot rapidly cut off the conductive copper bar, so that the fuse has insufficient protection effect on a circuit and cannot be well applied to high-precision products.

In view of this, the present utility model has been made.

Disclosure of Invention

In order to overcome the defects, the utility model provides the quick cutting device and the instantaneous cutting circuit breaker, and the cutting device has the characteristics of quick response time, quick moving speed and the like, so that the protection effect of the circuit breaker on a circuit is greatly improved, and the quick cutting device can be well applied to high-precision products.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the quick cutting device comprises a base body part, a cutter and an igniter, wherein a sealed cavity is arranged on the base body part, and a gas generating medicine is contained in the sealed cavity; the cutter is made of insulating materials and is fixedly connected to the outer wall of the base body part; the igniter is arranged in the sealed cavity and is used for detonating the gas generating medicine;

when the ignition tool detonates the gas generating agent, the cutting device can integrally move relative to the device to be cut under the action of high-pressure gas, so that the cutting knife can cut the device to be cut.

As a further improvement of the present utility model, the base body has a base body made of an insulating material, and a cavity for accommodating the gas generating agent and the igniter is formed in the base body, and the cover a is sealed outside the notch of the cavity, that is, the cover a and the cavity are enclosed together to form the sealed chamber.

As a further improvement of the utility model, the sealing cover A is hermetically coated outside the notch of the groove cavity through an injection molding process;

the base body and the cutter are made of ceramic materials, and the cutter is integrally connected to the outer wall of the base body, which is opposite to the sealing cover A.

As a further improvement of the utility model, the ignition tool is provided with an ignition electrode plug and an ignition lead, wherein the ignition electrode plug is provided with an ignition electrode for providing heat, a powder cup fixedly connected with the ignition electrode and used for containing powder, a sealing cover B sleeved outside the powder cup, and an encapsulation layer encapsulated outside the ignition electrode and the opening side of the sealing cover B; one end of the ignition lead is fixedly connected with the ignition electrode, and the other end of the ignition lead extends out of the encapsulation layer in a sealing way;

in addition, when the ignition tool is arranged in the sealed chamber, the other end of the ignition lead also extends out of the base body in a sealing way.

As a further improvement of the utility model, the ignition electrode is of a sheet structure, the front surface of the ignition electrode is provided with a bridge wire, and the back surface of the ignition electrode is provided with an electrode; and the electrode is in electrical communication with the bridge wire;

the medicine cup is of a sleeve-shaped structure with two open ends in the axial direction, one shaft end of the medicine cup is fixedly arranged on the front face of the ignition electrode, and one shaft end of the medicine cup is also arranged outside the bridge wire in a surrounding mode.

As a further improvement of the utility model, the ignition electrode is further provided with an insulating layer and a heating layer, the heating layer is fixedly arranged on the front surface of the insulating layer, the bridge wire is manufactured on the heating layer, and a gap is arranged between the peripheral edge of the heating layer and the peripheral edge of the front surface of the insulating layer, so that the front surface of the insulating layer is partially exposed out of the heating layer, and the part of the front surface of the insulating layer exposed out of the heating layer is fixedly connected with one shaft end of the medicine cup, so that the heating layer and the bridge wire on the heating layer are accommodated in the medicine cup;

the electrode is fixedly arranged on the back surface of the insulating layer, and is electrically conducted with the heating layer.

As a further improvement of the utility model, the medicine cup is fixedly connected with the ignition electrode through an injection molding process;

the sealing cover B is of a sleeve-shaped structure with an opening at one shaft end and a closed shaft end, and is tightly sleeved outside the medicine cup and the ignition electrode;

the encapsulation layer is wrapped outside the ignition electrode and the opening side of the sealing cover B through an injection molding process;

and one end of the ignition lead is fixedly connected with the electrode in a welding way.

As a further improvement of the present utility model, the cutoff device is accommodated in a cutoff working chamber which is a semi-closed chamber structure, i.e., the cutoff working chamber has an opening side; and the device to be cut is arranged beside the opening side of the cutting working chamber;

in the cutting device, the outer wall of the base body is in close-fit sliding connection with the inner wall of the cutting working chamber, the sealing cover A faces the sealing side of the cutting working chamber, and the cutter faces the opening side of the cutting working chamber.

The utility model also provides an instantaneous cut-off circuit breaker, which comprises a sealed shell, a conductive copper bar and a cut-off device, wherein an arc extinguishing chamber and a cut-off working chamber are arranged in the sealed shell, the arc extinguishing chamber and the cut-off working chamber are oppositely arranged and mutually communicated, and arc extinguishing materials are arranged in the arc extinguishing chamber; the conductive copper bar penetrates through the sealed shell, and is also partially positioned between the arc extinguishing chamber and the cutting-off working chamber; the cutting device adopts the structure of the rapid cutting device, the cutting device is arranged in the cutting working chamber, and the cutting device can move relative to the conductive copper bar under the action of high-pressure gas so that the cutter cuts off the conductive copper bar; and the part of the conductive copper bar cut off by the cutter falls into the arc extinguishing chamber.

As a further improvement of the utility model, the number of the cutting working chambers is one or not less than two, and the number of the arc extinguishing chambers is the same as the number of the cutting working chambers and are arranged in a one-to-one opposite way; the number of the cutting devices is the same as that of the cutting working chambers, and the cutting devices are correspondingly arranged in the cutting working chambers one by one;

in addition, when the cutting working chamber and the arc extinguishing chamber are configured to be at least two, the at least two cutting working chambers are arranged beside one side of the conductive copper bar in parallel, and correspondingly, the at least two arc extinguishing chambers are arranged beside the opposite side of the conductive copper bar in parallel;

or at least two cutting working chambers are distributed beside the opposite sides of the conductive copper bar in a staggered manner, and correspondingly, at least two arc extinguishing chambers are also distributed beside the opposite sides of the conductive copper bar in a staggered manner.

The beneficial effects of the utility model are as follows: on one hand, the utility model improves and innovates the structure of the igniter, thereby accelerating the response time of the powder to the external impact energy (the response time can reach 50 microseconds after the verification of the product, which is far faster than the response time/speed of the existing igniter), and improving the sealing performance of the igniter, so as to greatly shorten the detonation time of the igniter and the gas generating agent while improving the safety reliability and the action reliability of the igniter, namely greatly quickening the response time of the cutting device to the external signal, further greatly improving the protection effect of the circuit breaker, and being applicable to high-precision products. On the other hand, the ignition tool and the gas generating agent are also placed in the sealed cavity of the base body, so that the time for the ignition tool to detonate the gas generating agent is shortened, the speed of the cutting device moving towards the conductive copper bar (namely the device to be cut off) is accelerated under the dual action of the acting force and the reacting force generated by high-pressure gas, the time for the cutting device to cut off the conductive copper bar is greatly shortened, and the protection effect of the circuit breaker on a circuit is further improved.

Drawings

FIG. 1 is a schematic cross-sectional view of a quick disconnect apparatus according to the present utility model at a first viewing angle;

FIG. 2 is a schematic cross-sectional view of the quick disconnect apparatus of the present utility model at a second view angle;

FIG. 3 is a schematic cross-sectional view of the quick disconnect apparatus of the present utility model at a third view angle;

FIG. 4 is a schematic cross-sectional view of the igniter of the present utility model at a first viewing angle;

FIG. 5 is a schematic cross-sectional view of the igniter of the present utility model at a second viewing angle;

FIG. 6 is a schematic view of a partial cross-sectional structure of an ignition electrode plug according to the present utility model;

FIG. 7 is a schematic cross-sectional view of the ignition electrode according to the present utility model at a first viewing angle;

FIG. 8 is a schematic cross-sectional view of the ignition electrode according to the present utility model at a second viewing angle;

FIG. 9 is a schematic cross-sectional view of the cup of the present utility model after being assembled on the ignition electrode and under a first view angle;

FIG. 10 is a schematic cross-sectional view of the cup of the present utility model after being assembled on the ignition electrode and under a second view angle;

FIG. 11 is a schematic cross-sectional view of a cover B according to the present utility model;

fig. 12 is a schematic view showing a partial sectional structure of the instantaneous circuit breaker according to the present utility model at a first view angle;

fig. 13 is a schematic view showing a partial sectional structure of the instantaneous circuit breaker according to the present utility model at a second view angle;

fig. 14 is a schematic view showing a partial sectional structure of the instantaneous circuit breaker according to the present utility model at a third view angle.

The following description is made with reference to the accompanying drawings:

1. a cutting device; 10. a base portion; 100. a sealed chamber; 101. a base body; 102. a sealing cover A; 11. a cutter; 12. an igniter; 120. an ignition lead; 121. an ignition electrode; 1210. a bridging thread; 1211. an electrode; 1212. an insulating layer; 1213. a heat generating layer; 1214. a via hole; 122. a medicine cup; 123. a cover B; 124. an encapsulation layer; 2. a sealed housing; 20. an arc extinguishing chamber; 21. cutting off the working chamber; 3. conductive copper bars.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Example 1:

referring to fig. 1 to 3, embodiment 1 provides a quick cutting device, which mainly includes a base portion 10, a cutter 11 and an igniter 12, wherein a sealed chamber 100 is provided on the base portion 10, and a gas generating agent G is contained in the sealed chamber 100; the cutter 11 is made of insulating material and fixedly connected to the outer wall of the base body 10; the igniter 12 is arranged in the sealed chamber 100 and is used for detonating the gas generating agent G; and when the igniter 12 detonates the gas generating agent G, the cutting device can integrally move relative to the device to be cut under the action of high-pressure gas, so as to realize the cutting operation of the cutter 11 on the device to be cut.

In order to better understand the working principle of the quick-cut-off device, the specific structure and application environment of the quick-cut-off device will be described in detail.

First, as shown in fig. 1 to 3, the base portion 10 has a base body 101 and a cover a102, the base body 101 is made of an insulating material, a cavity for accommodating the gas generating agent G and the igniter 12 is formed on the base body 101, and the cover a102 is sealed outside the notch of the cavity, that is, the cover a102 and the cavity are enclosed together to form the sealed chamber 100.

Further preferably, the cover a102 is sealed and coated outside the notch of the groove cavity through an injection molding process, namely: the sealing cover A102 is made of an insulating plastic material; this is to enable the high-pressure gas generated after the gas generating agent G is detonated to break the cover a102, so that the high-pressure gas can react to the quick cutting device to accelerate the cutting device to move relatively to the device to be cut.

The base body 101 and the cutter 11 are both made of ceramic materials, and the cutter 11 is integrally connected to the outer wall of the base body 101 facing away from the cover a 102. As for the structure of the cutter 11, it may be preferable to use a structure having a horizontal strip shape and an inverted triangle or an inverted right trapezoid in vertical section, which is two preferred embodiments, and the specific implementation structure of the cutter is determined according to the product requirement.

Next, referring to fig. 4 to 6, the igniter 12 has an ignition electrode plug and an ignition lead 120, the ignition electrode plug has an ignition electrode 121 for providing heat, a powder cup 122 fixedly connected to the ignition electrode 121 for containing powder, a cover B123 sleeved outside the powder cup 122, and an encapsulation layer 124 encapsulated outside the ignition electrode 121 and the opening side of the cover B123; one end of the ignition lead 120 is fixedly connected with the ignition electrode 121, and the other end of the ignition lead 120 extends out of the encapsulation layer 124 in a sealing manner; in addition, when the igniter 12 is placed in the sealed chamber 100, the other end of the ignition lead 120 also extends out of the base portion 10 in a sealed manner.

When the igniter 12 is required to operate to detonate the gas generating charge G, the ignition lead 120 is controlled to be connected to an operating power supply (or an external power circuit), so that the ignition electrode 121 is connected to the power supply and generates heat to detonate the powder in the charge cup 122 (after the powder is detonated, the cover B123 is exploded), and the gas generating charge G can be detonated.

With respect to the igniter 12 structure, it is further described that:

referring to fig. 4 to 8, the ignition electrode 121 is in a circular sheet structure, and mainly comprises a bridge wire 1210, an electrode 1211 (copper-clad layer), an insulating layer 1212 and a heat-generating layer 1213, wherein the insulating layer 1212 is a prepreg with a thickness of 200-2000 μm, the heat-generating layer 1213 is an alloy material (such as nichrome) with a thickness of 2-50 μm, the heat-generating layer 1213 is fixed on the front surface of the insulating layer 1212 through a glue layer, the copper-clad layer is 5-100 μm thick and is also fixed on the back surface of the insulating layer 1212 through a glue layer, and the copper-clad layer is electrically connected with the heat-generating layer 1213 through a via hole 1214. Description: the manufacturing method of the via 1214 includes: and forming a through hole penetrating through the front surface and the back surface of the insulating layer 1212, and plating a copper layer in the through hole to obtain the through hole. The method for manufacturing the via 1214 is a conventional technical means in the circuit board industry, and therefore will not be described in detail herein.

The bridge wires 1210 are formed on the heat-generating layer 1213 by a circuit manufacturing method conventional in the circuit board industry (i.e. the bridge wires 1210 are formed on the front surface of the ignition electrode 121), and the bridge wires 1210 can be in I-shape, S-shape or other shapes, and the number of the bridge wires 1210 is not less than two, so that when one bridge wire cannot work due to damage, other bridge wires can work normally, thereby effectively improving the ignition success rate of the ignition electrode 121 and improving the reliability and safety of the ignition electrode plug 1 when in work.

The electrode 1211 is manufactured by performing an etching process on the copper-clad layer, that is: the electrode 1211 can be obtained by processing the copper-clad layer into a set shape by an etching process. This also indicates that: the electrode 1211 is formed on the back surface of the ignition electrode 121 (specifically, the electrode 1211 is fixedly disposed on the back surface of the insulating layer 1212), and the electrode 1211 is in electrical communication with the bridge wire 1210 and the heat generating layer 1213.

From the above, the ignition electrode provided by the utility model has the following characteristics: (1) the ignition electrode has a firm structure, is not easily damaged by external force, and ensures the product quality; (2) the ignition electrode has high ignition success rate and good ignition effect, and ensures the reliability and safety of the ignition electrode during working; (3) the ignition electrode has small volume, light weight and convenient installation, and can be well applied to components requiring precision for the volume and the weight of products.

Referring to fig. 4 to 6, 9 and 10, the medicine cup 122 is a circular sleeve structure with two open ends in the axial direction, one axial end of the medicine cup 122 is fixedly disposed on the front surface of the ignition electrode 121, and at the same time, one axial end of the medicine cup 122 is also enclosed outside the bridge wire 1210.

The specific structure for realizing the above-mentioned "the one axial end of the medicine cup 122 is fixedly disposed on the front surface of the ignition electrode 121, and the one axial end of the medicine cup 122 is further enclosed outside the bridge wire 1210" is as follows: referring to fig. 7, in the ignition electrode 121, a gap is formed between a peripheral edge of the heat-generating layer 1213 and a peripheral edge of a front surface of the insulating layer 1212, so that the front surface of the insulating layer 1212 is partially exposed out of the heat-generating layer 1213, and a portion of the front surface of the insulating layer 1212 exposed out of the heat-generating layer 1213 (specifically, an exposed portion on the front surface of the insulating layer 1212 and between a front edge of the insulating layer 1212 and a front edge of the heat-generating layer 1213) is fixedly connected to one axial end of the medicine cup 122, so that the heat-generating layer 1213 and the bridge wire 1210 thereon are accommodated in the medicine cup 122.

Further preferably, the medicine cup 122 is fixedly connected with the ignition electrode 121 by an injection molding process, which also indicates that: the medicine cup 122 is made of an insulating plastic material. In addition, a stepped structure is formed on the inner sidewall of the medicine cup 122. Depending on product design requirements, the cup 122 may be filled with at least two types of powder, such as: the ignition charge L and the initiating charge D, and at the time of addition, the manner of "filling the ignition charge L into the charge cup 122 first and then filling the initiating charge D again" is adopted, wherein the addition amount of the ignition charge L can be measured, limited by the step structure, i.e., the ignition charge L is added to be flush with the step structure. Thus, the stepped structure facilitates rapid charge of the powder.

Referring to fig. 4 to 6 and fig. 11, the cover B123 is a circular sleeve structure with an opening at one shaft end and a closed other shaft end, and the cover B123 is made of insulating plastic material. In addition, when the product is assembled, the cover B123 is tightly fitted over the medicine cup 122 and the ignition electrode 121.

The encapsulation layer 124 is encapsulated outside the backside of the ignition electrode 121 and the opening side of the cover B123 by an injection molding process, namely: the encapsulating layer 124 is also made of an insulating plastic material, and the shape of the encapsulating layer 124 may be square, etc.

In addition, the present utility model does not limit the structural shape of the ignition lead 120, and may take various shapes such as L-shape, straight bar shape, etc., which is determined according to the design requirement of the product. And one end of the ignition lead 120 is welded and fixedly connected to the electrode 1211 by welding when the product is assembled.

In summary, in combination with the above description of the structure of the igniter 12, it can be seen that the igniter according to the present utility model has the following advantages: (1) the ignition electrode has the advantages of high ignition success rate, good ignition effect and the like, and the gunpowder in the powder cup is directly piled up above the ignition electrode, so that the response time of the gunpowder to the external impact energy can be accelerated, the response time can reach 50 microseconds after product verification, and is far faster than the response time/speed of the existing ignition tool, thereby the use requirement of the ignition tool on high-precision products with high sensitivity can be well met; (2) the sealing cover B and the encapsulation layer are combined to seal the ignition electrode and the gunpowder, so that the sealing performance of the ignition electrode plug can be effectively ensured, the capability of the ignition device for resisting external induction can be well ensured, and the safety and the reliability of the ignition device can be ensured. (3) The ignition tool also has the advantages of firm structure, small volume, light weight, convenient installation and the like, and can be well applied to components requiring precision in product volume and weight.

Finally, an application environment of the quick-cut device is described, for example: the cutting device is accommodated in a cutting working chamber which is of a semi-closed chamber structure, namely the cutting working chamber is provided with an opening side; and the device to be cut is provided beside the opening side of the cutting working chamber.

In this cutting device, the outer wall of the base body 101 is slidably connected to the inner wall of the cutting chamber in a tight fit, the cover a102 faces the closed side of the cutting chamber, and the cutter 11 faces the open side of the cutting chamber.

In combination with the above description of the specific structure and application environment of the quick cutting device, it can be known that the working principle of the quick cutting device is as follows: the ignition lead 120 is connected to an external power supply circuit (or an external working power supply), so that the ignition electrode 121 is connected to the power supply and generates heat to detonate the powder in the powder cup 122 (after the powder is detonated, the cover B123 is exploded), so as to detonate the gas generating powder G, generate a large amount of gas, and form a high pressure in the sealed chamber 100 instantaneously, the high pressure gas drives the whole cutting device to move relatively to the device to be cut, and after the gas pressure rises to a certain extent (which means that although the time for completely detonating the gas generating powder G is very short, in order of microseconds, the gas pressure generated by the gas generating powder G is in rising curve change), the high pressure gas can break the cover a102, but the high pressure gas flushed from the cover a102 cannot break the cutting working chamber, so that the high pressure gas flushed from the cover a102 exerts a reaction force on the cutting device, namely pushes the cutting device to accelerate to move towards the device to be cut, thereby realizing quick cutting device to be cut.

Example 2:

the embodiment 2 provides an instantaneous circuit breaker, mainly comprising a sealed housing 2, a conductive copper bar 3 and a cutting device 1, wherein the sealed housing 2 is made of a metal material (such as a stainless steel material), an arc extinguishing chamber 20 and a cutting working chamber 21 are also arranged in the sealed housing 2, the arc extinguishing chamber 20 and the cutting working chamber 21 are oppositely arranged and are mutually communicated, and arc extinguishing materials (other arc extinguishing structures can be also arranged in the arc extinguishing chamber 20 according to requirements); the conductive copper bar 3 is arranged in the sealed shell 2 in a penetrating way, and the conductive copper bar 3 is also partially arranged between the arc extinguishing chamber 20 and the cutting-off working chamber 21. In particular, the instantaneous circuit breaker of this embodiment 2 is different from the existing fuse structure in the following way: in this embodiment 2, the rapid cutting device structure provided in the foregoing embodiment 1 is adopted in the cutting device 1, the cutting device 1 is disposed in the cutting working chamber 21, and the cutting device 1 can move relative to the conductive copper bar 3 under the action of high-pressure gas, so that the cutter 11 cuts off the conductive copper bar 3; and the portion of the conductive copper bar 3 cut by the cutter 11 falls into the arc extinguishing chamber 20.

In embodiment 2, preferably, the number of the cutting operation chambers 21 is one or not less than two, and the number of the arc extinguishing chambers 20 is the same as the number of the cutting operation chambers 21 and is arranged in a one-to-one opposite manner; the number of the cutting devices 1 is the same as the number of the cutting working chambers 21, and the cutting devices are arranged in the cutting working chambers 21 in a one-to-one correspondence. Fig. 12 and 13 show a case where the cutoff working chamber 21, the arc extinguishing chamber 20, and the cutoff device 1 are arranged in two, respectively, and fig. 14 shows a case where the cutoff working chamber 21, the arc extinguishing chamber 20, and the cutoff device 1 are arranged in one.

Further preferably, when the cutting operation chambers 21 and the arc extinguishing chambers 20 are each configured to be at least two, at least two of the cutting operation chambers 21 may be arranged in parallel on one side of the conductive copper bar 3 (at least two of the cutting operation chambers 21 are not in communication or may be in communication with each other), and at that time, correspondingly, at least two of the arc extinguishing chambers 20 are arranged in parallel on the opposite other side of the conductive copper bar 3 (at least two of the arc extinguishing chambers 20 are not in communication with each other), as shown in fig. 13; or at least two of the cutting working chambers 21 may be alternately disposed at opposite sides of the conductive copper bar 3 (at least two of the cutting working chambers 21 are not communicated with each other), and then correspondingly, at least two of the arc extinguishing chambers 20 are alternately disposed at opposite sides of the conductive copper bar 3 (at least two of the arc extinguishing chambers 20 are not communicated with each other), as shown in fig. 12.

Further preferably, a guide structure a is provided on the inner wall of the cutting chamber 21, a guide structure B is provided on the outer wall of the base body 10, and the guide structure B is in close-fitting sliding connection with the guide structure a.

The concrete explanation is as follows: based on the horizontal placement state of the conductive copper bar 3, the cutting working chamber 21 and the arc extinguishing chamber 20 are arranged in a vertically opposite manner, and the guiding structure a and the guiding structure B are respectively selected from one of a chute and a slide bar extending vertically, namely: the guide structure A can adopt a chute extending along the vertical direction, and correspondingly, the guide structure B adopts a slide bar extending along the vertical direction; alternatively, the guiding structure a may use a slide bar extending vertically, and the guiding structure B may use a chute extending vertically. By adopting close-fitting sliding connection between the base body 10 (cutting device 1) and the cutting working chamber 21, on the one hand, the close-fitting connection can prevent products from moving the cutting device 1 and cutting off the conductive copper bars 3 due to external force (such as vibration), so that the stability and working accuracy of the circuit breaker products are improved; on the other hand, the above "tight-fitting connection" satisfies: the high pressure gas generated during operation of the shut-off device 1 overcomes the constraint of a "tight-fitting connection" and allows the shut-off device 1 to move/slide with respect to the shut-off working chamber 21.

In embodiment 2, it is preferable that a cutting notch is formed on the conductive copper bar 3 to facilitate the cutting by the cutter 11; and the two ends of the conductive copper bar 3 are electrically connected to an external circuit. Of course, with respect to the cutting device 1, the ignition lead 120 of the igniter 12 is sealed and extended out of the sealed casing 2 to be electrically connected to an external circuit.

The arc-extinguishing material is formed by mixing an organic arc-extinguishing material and an inorganic arc-extinguishing material, wherein the organic arc-extinguishing material is at least one of guanidine, purine, melamine, urea and derivatives and mixtures thereof, and the inorganic arc-extinguishing material is at least one of quartz sand, kaolin, gypsum powder, inorganic silicate, hydrated alumina, borate, calcium carbonate, magnesium hydroxide and mixtures thereof. The addition amounts of the organic arc-extinguishing material and the inorganic arc-extinguishing material may be determined according to the design requirement of the product, but in general, the addition amount of the inorganic arc-extinguishing material is larger than the addition amount of the organic arc-extinguishing material, for example, the two materials may be mixed according to a weight ratio of 3:7, and the present utility model is not limited to the weight ratio.

In addition, in embodiment 2, it is preferable that an exhaust passage is further provided in the sealed housing 2, and the exhaust passage is respectively communicated with the arc extinguishing chamber 20 and the outside. That is, the high-pressure gas generated when the cutting device 1 is operated is discharged to the outside through the cutting operation chamber 21, the arc extinguishing chamber 20, and the exhaust passage.

When the cutting device 1 cuts off the conductive copper bar 3, high-pressure gas blows an arc generated when the conductive copper bar is cut off to the direction of the arc extinguishing chamber 20, so that the arc is lengthened; at the same time, the arc extinguishing material in the arc extinguishing chamber 20 absorbs heat to reduce the temperature, so that the arc is extinguished; this also indicates that: the exhaust passage can cooperate with the arc extinguishing material to rapidly and effectively finish arc extinguishing.

In summary, on the one hand, the utility model improves and innovates the structure of the igniter, thereby accelerating the response time of the powder to the external impact energy (the response time can reach 50 microseconds after the verification of the product, which is far faster than the response time/speed of the existing igniter), and improving the sealing performance of the igniter, so as to greatly shorten the detonation time of the igniter and the gas generating agent while improving the safety reliability and the action reliability of the igniter, namely, greatly quickening the response time of the cutting device to the external signal, further greatly improving the protection effect of the circuit breaker to the circuit, and being well applied to high-precision products. On the other hand, the ignition tool and the gas generating agent are also placed in the sealed cavity of the base body, so that the time for the ignition tool to detonate the gas generating agent is shortened, the speed of the cutting device moving towards the conductive copper bar (namely the device to be cut off) is accelerated under the dual action of the acting force and the reacting force generated by high-pressure gas, the time for the cutting device to cut off the conductive copper bar is greatly shortened, and the protection effect of the circuit breaker on a circuit is further improved.

In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The foregoing description is only of a preferred embodiment of the utility model, which can be practiced in many other ways than as described herein, so that the utility model is not limited to the specific implementations disclosed above. While the foregoing disclosure has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes and modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model without departing from the technical solution of the present utility model still falls within the scope of the technical solution of the present utility model.

Claims (10)

1. A quick cutting device, characterized in that: the gas generating device comprises a base body part (10), a cutter (11) and an igniter (12), wherein a sealed cavity (100) is arranged on the base body part (10), and a gas generating medicine is contained in the sealed cavity (100); the cutter (11) is made of insulating materials and is fixedly connected to the outer wall of the base body part (10); the igniter (12) is arranged in the sealed cavity (100) and is used for detonating the gas generating medicine;

when the igniter (12) detonates the gas generating agent, the cutting device can integrally move relative to the device to be cut under the action of high-pressure gas, so that the cutting knife (11) cuts the device to be cut.

2. The quick disconnect apparatus of claim 1, wherein: the base body part (10) is provided with a base body main body (101) and a sealing cover A (102), the base body main body (101) is made of an insulating material, a groove cavity for accommodating the gas generating medicine and the igniter (12) is formed in the base body main body (101), and the sealing cover A (102) is sealed outside a notch of the groove cavity, namely, the sealing cover A (102) and the groove cavity are combined together to form the sealed cavity (100).

3. The quick disconnect apparatus of claim 2, wherein: the sealing cover A (102) is hermetically coated outside the notch of the groove cavity through an injection molding process;

the base body (101) and the cutter (11) are made of ceramic materials, and the cutter (11) is integrally connected to the outer wall of the base body (101) facing away from the sealing cover A (102).

4. The quick disconnect apparatus of claim 2, wherein: the ignition tool (12) is provided with an ignition electrode plug and an ignition lead (120), wherein the ignition electrode plug is provided with an ignition electrode (121) for providing heat, a powder cup (122) fixedly connected with the ignition electrode (121) and used for containing powder, a sealing cover B (123) sleeved outside the powder cup (122) and a sealing layer (124) sealed outside the opening sides of the ignition electrode (121) and the sealing cover B (123); one end of the ignition lead (120) is fixedly connected with the ignition electrode (121), and the other end of the ignition lead (120) extends out of the encapsulation layer (124) in a sealing way;

in addition, when the igniter (12) is arranged in the sealed chamber (100), the other end of the ignition lead (120) also extends out of the base body part (10) in a sealing way.

5. The quick disconnect apparatus of claim 4, wherein: the ignition electrode (121) is of a sheet-shaped structure, the front surface of the ignition electrode is provided with a bridge wire (1210), and the back surface of the ignition electrode is provided with an electrode (1211); and the electrode (1211) is in electrical communication with the bridge wire (1210);

the medicine cup (122) is of a sleeve-shaped structure with two open ends in the axial direction, one shaft end of the medicine cup (122) is fixedly arranged on the front face of the ignition electrode (121), and one shaft end of the medicine cup (122) is also arranged outside the bridge wire (1210) in a surrounding mode.

6. The quick disconnect apparatus of claim 5, wherein: the ignition electrode (121) is further provided with an insulating layer (1212) and a heating layer (1213), the heating layer (1213) is fixedly arranged on the front surface of the insulating layer (1212), the bridge wire (1210) is manufactured on the heating layer (1213), a gap is formed between the peripheral edge of the heating layer (1213) and the peripheral edge of the front surface of the insulating layer (1212), so that the front surface of the insulating layer (1212) is partially exposed out of the heating layer (1213), and the part of the front surface of the insulating layer (1212) exposed out of the heating layer (1213) is fixedly connected with one shaft end of the medicine cup (122), so that the heating layer (1213) and the bridge wire (1210) on the heating layer (1213) are accommodated in the medicine cup (122);

the electrode (1211) is fixedly arranged on the back surface of the insulating layer (1212), and the electrode (1211) is electrically connected with the heating layer (1213).

7. The quick disconnect apparatus of claim 5, wherein: the medicine cup (122) is fixedly connected with the ignition electrode (121) through an injection molding process;

the sealing cover B (123) is of a sleeve-shaped structure with an opening at one shaft end and a closing at the other shaft end, and the sealing cover B (123) is tightly sleeved outside the medicine cup (122) and the ignition electrode (121);

the encapsulation layer (124) is wrapped outside the opening side of the ignition electrode (121) and the sealing cover B (123) through an injection molding process;

one end of the ignition lead (120) is fixedly connected with the electrode (1211) in a welding way.

8. A quick disconnect apparatus as defined in claim 3 wherein: the cutting device is accommodated in a cutting working chamber which is of a semi-closed chamber structure, namely the cutting working chamber is provided with an opening side; and the device to be cut is arranged beside the opening side of the cutting working chamber;

in the cutting device, the outer wall of the base body (101) is in close-fit sliding connection with the inner wall of the cutting working chamber, the sealing cover A (102) faces the sealing side of the cutting working chamber, and the cutter (11) faces the opening side of the cutting working chamber.

9. The instantaneous circuit breaker comprises a sealed shell (2), a conductive copper bar (3) and a cutting device (1), wherein an arc extinguishing chamber (20) and a cutting working chamber (21) are arranged in the sealed shell (2), the arc extinguishing chamber (20) and the cutting working chamber (21) are oppositely arranged and are mutually communicated, and arc extinguishing materials are arranged in the arc extinguishing chamber (20); the conductive copper bar (3) is arranged in the sealed shell (2) in a penetrating way, and the conductive copper bar (3) is also partially positioned between the arc extinguishing chamber (20) and the cutting-off working chamber (21); the method is characterized in that: the cutting device (1) adopts the rapid cutting device structure as claimed in any one of claims 1-8, the cutting device (1) is arranged in the cutting working chamber (21), and the cutting device (1) can move relative to the conductive copper bar (3) under the action of high-pressure gas so that the cutter (11) cuts off the conductive copper bar (3); and the part of the conductive copper bar (3) cut off by the cutter (11) falls into the arc extinguishing chamber (20).

10. The instantaneous circuit breaker of claim 9, wherein: the number of the cutting working chambers (21) is one or not less than two, and the number of the arc extinguishing chambers (20) is the same as the number of the cutting working chambers (21) and are arranged in a one-to-one opposite manner; the number of the cutting devices (1) is the same as that of the cutting working chambers (21), and the cutting devices are arranged in the cutting working chambers (21) in a one-to-one correspondence manner;

in addition, when the cutting working chambers (21) and the arc extinguishing chambers (20) are configured to be at least two, the at least two cutting working chambers (21) are arranged beside one side of the conductive copper bar (3), and correspondingly, the at least two arc extinguishing chambers (20) are arranged beside the opposite side of the conductive copper bar (3);

or, at least two cutting working chambers (21) are alternately distributed beside the opposite sides of the conductive copper bar (3), and correspondingly, at least two arc extinguishing chambers (20) are alternately distributed beside the opposite sides of the conductive copper bar (3).