CN220085929U - Quick sealing and cutting device for circuit - Google Patents

Abstract

The utility model relates to a circuit rapid sealing and cutting device, which comprises a shell, wherein an igniter, a piston and a conductor are arranged in the shell, the conductor penetrates through the shell, the igniter and the piston are positioned on the same side of the conductor, an arc-extinguishing chamber positioned on the other side of the conductor is also arranged in the shell, a baffle plate component is fixedly arranged in the arc-extinguishing chamber so as to divide the arc-extinguishing chamber into a plurality of arc-extinguishing chambers, and each arc-extinguishing chamber is internally provided with an arc-extinguishing body which is mutually independent; the igniter can drive the piston to move to a blocking state in a direction approaching to the arc extinguishing body so as to cut off part of the conductor through the piston and form a plurality of fragments, and each fragment corresponds to one arc extinguishing cavity; under the blocking state, the piston, the baffle plate component and the arc extinguishing body jointly isolate the fragment in the corresponding arc extinguishing cavity; the arc carried by the fragments is prevented from being conducted with each other through the metal arc extinguishing body, the possibility of re-burning and leakage of the arc is reduced, and therefore the effect of increasing the insulation effect of the device is achieved.

Description

Quick sealing and cutting device for circuit

Technical Field

The utility model relates to the technical field of electric power, in particular to a circuit quick sealing and cutting device.

Background

The circuit cutting device is used for rapidly cutting off a circuit and realizing insulation when encountering a safety problem, in order to improve the arc extinguishing capability, a part of the circuit cutting device is often additionally provided with an arc extinguishing medium (such as a metal wire, an arc extinguishing grid sheet and the like) or a cutting opening is additionally arranged, the arc extinguishing medium in the former can extinguish a contacted arc, so that the effect of rapid arc extinguishing is achieved, and the part of the conductor can be cut off to improve the current breaking capability;

however, when the cut-off conductor segments are in contact with the arc extinguishing medium, the arc carried by each segment may be conducted to each other through the arc extinguishing medium made of metal, so that the arc energy increases, and the probability of arc re-ignition and leakage increases.

Disclosure of Invention

Based on the above, it is necessary to provide a circuit rapid sealing and cutting device capable of effectively reducing the probability of arc re-ignition and leakage, aiming at the problem that the current arc carried by the conductor fracture is conducted with each other through an arc extinguishing medium, so that the probability of arc re-ignition and leakage is increased.

The utility model provides a circuit rapid sealing and cutting device which comprises a shell, wherein an igniter, a piston and a conductor are arranged in the shell, the conductor penetrates through the shell, the igniter and the piston are positioned on the same side of the conductor, an arc-extinguishing chamber positioned on the other side of the conductor is also arranged in the shell, a baffle plate component is fixedly arranged in the arc-extinguishing chamber so as to divide the arc-extinguishing chamber into a plurality of arc-extinguishing chambers, and each arc-extinguishing chamber is internally provided with an arc-extinguishing body which is mutually independent; the igniter can drive the piston to move to a blocking state in the direction of approaching to the arc extinguishing body so as to cut part of the conductor through the piston and form a plurality of fragments, and each fragment corresponds to one arc extinguishing cavity; under the blocking state, the piston, the baffle plate component and the arc extinguishing body jointly isolate the fragment from the corresponding arc extinguishing cavity.

In one embodiment, the housing comprises an upper housing, a conductor fixing part and a lower housing which can be mutually fixed, the conductor is fixedly arranged on the conductor fixing part, the arc extinguishing chamber is arranged on the lower housing, and the baffle assembly can prop against the conductor fixing part to divide the arc extinguishing chamber into a plurality of arc extinguishing chambers.

In one embodiment, the partition board assembly comprises a partition board and a protruding portion, the conductor fixing piece is provided with a through hole in a penetrating mode, the piston can be in sliding fit with the inner wall of the through hole, and one side, close to the arc extinguishing body, of the piston is provided with a containing chamber; under the blocking state, the piston is propped against the arc extinguishing body, and the protruding part is inserted into the accommodating chamber so as to jointly isolate the fragment from the corresponding arc extinguishing cavity through the piston, the protruding part and the arc extinguishing body.

In one embodiment, in the blocking state, the side surface of the protruding portion is in interference fit with the inner side wall of the accommodating chamber, so that the accommodating chamber is divided into a plurality of fragment accommodating cavities respectively located in the arc extinguishing cavities, and the fragments are accommodated in the corresponding fragment accommodating cavities.

In one embodiment, the protrusion includes a cutting edge near the side of the conductor and a plurality of guide surfaces corresponding to the arc extinguishing chambers one to one, the cutting edge can cut the part of the conductor cut off by the piston into a plurality of fragments, and the guide surfaces can guide the fragments to the arc extinguishing chambers corresponding to the fragments.

In one embodiment, the end face of the lower housing, which is close to one side of the conductor fixing member, is flush with the partition plate.

In one embodiment, in the blocking state, a portion of the piston is inserted into the arc extinguishing body.

In one embodiment, the piston has a columnar portion at one end thereof adjacent to the arc extinguishing body, and the columnar portion is inserted into the arc extinguishing body in a blocking state.

In one embodiment, the lower housing is close to the end face of one side of the conductor fixing piece, the arc extinguishing body and the partition board are flush, and at least one of the partition board and the piston is provided with an avoidance groove corresponding to the other one, so that one end of the piston, which is close to the arc extinguishing body, is inserted into the arc extinguishing body.

In one embodiment, the barrier assembly separates the arc chute into two arc chute chambers.

According to the circuit rapid sealing and cutting device, the piston, the partition plate component and the arc extinguishing bodies are used for jointly sealing and isolating the fragments in the corresponding arc extinguishing cavities, on one hand, the mutually independent arc extinguishing bodies are arranged in each arc extinguishing cavity, and the fragments are sealed and isolated in the corresponding arc extinguishing cavities, so that electric arcs carried by the fragments are prevented from being conducted with each other through the arc extinguishing bodies made of metal, the possibility of re-burning and leakage of the electric arcs is reduced, and the effect of increasing the insulation effect of the device is achieved; on the other hand, the sealing design can further reduce the possibility of arc leakage, thereby improving the insulativity of the circuit rapid sealing and cutting device.

Drawings

FIG. 1 is a schematic cross-sectional view of a circuit rapid seal cutoff apparatus of the present utility model in an initial state;

fig. 2 is a schematic diagram of a cross-sectional structure of a circuit rapid seal cutting device according to the present utility model in a front view after one of the arc extinguishing bodies is hidden in a blocking state;

FIG. 3 is a schematic perspective view of the lower housing of FIG. 1;

FIG. 4 is an enlarged schematic view of the lower housing of FIG. 1;

FIG. 5 is a schematic perspective view of the piston of FIG. 1;

fig. 6 is an enlarged schematic view of the piston of fig. 1.

Reference numerals: 100. a housing; 110. an upper housing; 120. a conductor fixing member; 121. a through hole; 130. a lower housing; 10. an igniter; 20. a piston; 21. a housing chamber; 21a, a fragment accommodating cavity; 211a, a blocking surface; 21b, a chimeric cavity; 22. a columnar portion; 23. a cutting section; 231. cutting off the cutting edge; 24. a piston avoiding groove; 30. an arc extinguishing chamber; 31. an arc extinguishing body; 32. a separator assembly; 321. a boss; 321a, a guide surface; 321b, cutting edges; 322. a partition plate; 322a, baffle avoiding grooves; 40. a conductor; 41. and (5) cutting.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 to 4, the present utility model provides a circuit rapid sealing and cutting device, which comprises a housing 100, wherein an igniter 10, a piston 20 and a conductor 40 are disposed in the housing 100, the conductor 40 penetrates through the housing 100, the igniter 10 and the piston 20 are located at the same side of the conductor 40, an arc extinguishing chamber 30 located at the other side of the conductor 40 is also disposed in the housing 100, a partition plate assembly 32 is fixedly disposed in the arc extinguishing chamber 30 to divide the arc extinguishing chamber 30 into a plurality of arc extinguishing chambers 30a, and each arc extinguishing chamber 30a is provided with an arc extinguishing body 31 independent from each other; the igniter 10 can drive the piston 20 to move to a blocking state in a direction approaching the arc extinguishing body 31, so that a part of the conductor 40 is cut off and split through the piston 20 to form a plurality of fragments 41, and each fragment 41 corresponds to one arc extinguishing cavity 30a; in the blocking state, the piston 20, the diaphragm assembly 32 and the arc extinguishing body 31 together isolate the segment 41 from the corresponding arc extinguishing chamber 30a.

The blocking state herein refers to a state in which the igniter 10 drives the piston 20 to move to the limit position, and the circuit rapidly seals the cutting device, at which time a part of the conductor 40 is cut off by the piston 20 to cause the circuit to be broken.

Specifically, the conductor 40 has a pre-designed weak position, and the igniter 10 drives the piston 20 to move in a direction approaching to the arc extinguishing body 31, so that part of the conductor 40 is cut off by impacting the weak position by the piston 20, and isolated insulation breaks with a certain interval are formed, so that the effect of cutting off a circuit is achieved; as the plunger 20 moves toward the arc extinguishing body 31, the plunger 20 can press the arc carried by the segment 41 against the arc extinguishing body 31 to extinguish the arc, thereby improving the insulation of the circuit rapid seal breaking device.

In the utility model, the piston 20, the baffle plate assembly 32 and the arc extinguishing bodies 31 are used for sealing and isolating the fragments 41 in the corresponding arc extinguishing cavities 30a, on one hand, the mutually independent arc extinguishing bodies 31 are arranged in each arc extinguishing cavity 30a, and each fragment 41 is sealed and isolated in the corresponding arc extinguishing cavity 30a, so that the electric arcs carried by the fragments 41 are prevented from being conducted with each other through the metal arc extinguishing bodies 31, the possibility of arc reignition and leakage is reduced, and the effect of increasing the insulation effect of the device is achieved; on the other hand, the sealing design can further reduce the possibility of arc leakage, thereby improving the insulativity of the circuit rapid sealing and cutting device.

Referring to fig. 1, in some embodiments, the housing 100 includes an upper housing 110, a conductor fixing member 120 and a lower housing 130, the conductor 40 is fixedly disposed on the conductor fixing member 120, the arc extinguishing chamber 30 is disposed on the lower housing 130, and the partition plate assembly 32 can abut against the conductor fixing member 120 to divide the arc extinguishing chamber 30 into a plurality of arc extinguishing chambers 30a.

Specifically, the conductor fixing member 120 is provided with a through hole 121 in a penetrating manner, the piston 20 can be in sliding fit with the inner wall of the through hole 121, and the protruding portion 321 is partially positioned in the through hole 121; the through hole 121 is slidably engaged with the plunger 20 such that the plunger 20 is inserted into the through hole 121 and forms a narrow gap with the through hole 121 to attenuate the arc at a first time while the plunger 20 is cutting the segment 41 from the conductor 40.

As shown in fig. 5 and 6, in some embodiments, the side of the piston 20 near the conductor 40 has two cutting portions 23, each cutting portion 23 has a cutting edge 231, and the cutting edge 231 is located at an end of the cutting portion 23 away from the other cutting portion 23.

By disposing the cutting edge 231 at the end of the cut-off portion 23 away from the other cut-off portion 23, the distance between the two weak positions of the conductor 40 is increased as much as possible, thereby increasing the length of the isolated insulated port after the cut-off of the segment 41, and increasing the expected current segmentation capability and insulation effect.

Referring to fig. 2, in some embodiments, the partition board assembly 32 includes a partition board 322 and a protruding portion 321, the conductor fixing member 120 is provided with a through hole 121 therethrough, the piston 20 can be slidably matched with the inner wall of the through hole 121, and a receiving chamber 21 is provided on a side of the piston 20 close to the arc extinguishing body 31; in the blocking state, the piston 20 abuts against the arc extinguishing body 31, and the protruding portion 321 is inserted into the accommodating chamber 21, so that the piston 20, the protruding portion 321 and the arc extinguishing body 31 jointly isolate the segment 41 from the corresponding arc extinguishing cavity 30a.

The boss 321 is capable of cutting the portion of the conductor 40 from which the piston 20 is cut into a plurality of fragments 41 when the piston 20 moves in a direction away from the igniter 10. Specifically, the protrusion 321 has at least one cutting edge 321b, and the portion of the conductor 40 cut off by the piston 20 also has a weak position corresponding to the cutting edge 321b, so that when the piston 20 moves in a direction approaching the arc extinguishing body 31, the weak position is cut off by the cutting edge 321b, so that the portion of the conductor 40 cut off by the piston 20 is cut into a plurality of fragments 41, so as to reduce the volume of each fragment 41, reduce the carrying amount of the arc, further reduce the possibility of arc leakage, and increase the insulation effect.

It should be noted that, in order to improve the arc-extinguishing capability, a part of the circuit cutting device often adopts a mode of adding arc-extinguishing medium (such as a metal wire, an arc-extinguishing grating sheet, etc.) or adding a cutting opening to realize quick arc extinguishing, but such a mode often needs a larger arc-extinguishing space, resulting in a larger device volume, and cannot be suitable for the miniaturization requirement of the circuit cutting device in the fields of new energy automobiles, etc.

In this regard, as shown in fig. 2, 5 and 6, in some embodiments, the protrusion 321 is inserted into the accommodating chamber 21 to clamp the segment 41 vertically through the protrusion 321 and the inner sidewall of the accommodating chamber 21.

Here, the vertical clamping means clamping the segment 41 in a state where the fracture of the segment 41 faces or is away from the igniter 10, and at this time, the boss 321 and the inner side wall of the accommodating chamber 21 respectively abut against a pair of end faces facing or away from the igniter 10 when the segment 41 is not cut off;

the vertical fracture piece 41 is clamped and accommodated between the protruding portion 321 and the inner wall of the accommodating chamber 21, and the thickness of the fracture piece 41 is relatively small, so that the requirement on the diameter of the shell 100 can be reduced by accommodating the fracture piece 41, and the whole volume of the circuit rapid sealing and cutting device is reduced as much as possible.

In addition, in the blocking state, the cutting part 23 is blocked between the fracture 41 and the fracture of the conductor 40 to weaken and block the electric arc between the fracture 41 and the fracture, so that the current segmentation capability and the insulation effect of the current rapid segmentation device are further improved.

Referring to fig. 5 and 6, in some embodiments, the accommodating chamber 21 includes a fitting cavity 21b corresponding to the protruding portion 321, and the protruding portion 321 can be inserted into the fitting cavity 21b and attached to an inner wall thereof.

In the blocking state, the protrusion 321 is inserted into the fitting cavity 21b and is fitted into the fitting cavity 21b, so that the gap between the protrusion 321 and the piston 20 can be reduced as much as possible, on the one hand, the possibility of leakage of the arc through the gap is reduced, on the other hand, the space utilization rate inside the housing 100 is improved, and the volume of the circuit rapid sealing and cutting device is further reduced.

Referring to fig. 5 and fig. 6, in some embodiments, the accommodating chamber 21 further includes two segment accommodating chambers 21a opened on the inner side wall of the engaging chamber 21b and/or the protruding portion 321, each segment 41 corresponds to one segment accommodating chamber 21a, and the segment 41 can be engaged against the inner wall of the corresponding segment accommodating chamber 21 a.

Taking the case that the section accommodating cavity 21a is formed in the piston 20 as an example, by forming the section accommodating cavity 21a in the piston 20, the section 41 is embedded in the piston 20, and the piston 20, the section 41 and the protruding portion 321 are tightly attached in a blocking state, so that on one hand, the space utilization rate can be increased, the volume of the device can be reduced, on the other hand, the possibility of arc leakage carried by the section 41 can be reduced due to tight attachment between the components, and the insulating performance of the device can be improved.

In some embodiments, in the blocking state, the side surface of the protruding portion 321 is in interference fit with the inner side wall of the accommodating chamber 21, so as to partition the accommodating chamber 21 into a plurality of fragment accommodating chambers 21a respectively located in each arc extinguishing chamber 30a, and the fragments 41 are accommodated in the corresponding fragment accommodating chambers 21 a.

Through the interference fit of the protruding portion 321 and the inner side wall of the embedded cavity 21b, the electric arcs carried by the fragments 41 in the different fragment accommodating cavities 21a can be prevented from being conducted with each other through the gaps between the protruding portion 321 and the inner side wall of the embedded cavity 21b, and therefore the insulation effect of the device is improved.

In some embodiments, the accommodating chamber 21 has a blocking surface 211a, and in the blocking state, the blocking surface 211a abuts against one of the sections of the segment 41 along the moving direction of the piston 20, so that the segment 41 is pressed into the arc extinguishing body 31 by the blocking surface 211a during the movement of the piston 20 toward the arc extinguishing body 31. Preferably, the blocking surface 211a is an inner wall of the fragment receiving chamber 21a on a side close to the igniter 10.

As shown in fig. 3 and 4, in some embodiments, the protruding portion 321 includes a cutting edge 321b located near the side of the conductor 40 and a plurality of guiding surfaces 321a corresponding to the arc extinguishing chambers 30a, the cutting edge 321b can cut a portion of the conductor 40 separated from the piston 20 into a plurality of fragments 41, and the guiding surfaces 321a can guide the fragments 41 to the corresponding arc extinguishing chambers 30a.

The segment 41 can deflect against the guiding surface 321a under the action of dead weight, specifically, the guiding surface 321a at least partially corresponds to the segment 41 along the movement direction of the piston 20, so that the segment 41 falls against the guiding surface 321a under the action of dead weight after being cut off from the conductor 40, and overturns to be attached to the guiding surface 321a under the guiding action of the guiding surface 321a (namely, the segment 41 is in a vertical state), thereby ensuring that the fracture of the segment 41 can be in a vertical state.

Of course, other limiting members or guiding members may be provided to change the orientation of the segment 41, so long as the segment 41 is in a vertical state in the blocking state, and the present utility model is not limited herein.

In some embodiments, the guiding surface 321a may be an inner sidewall of the arc extinguishing chamber 30 or other chamber, as long as it can be used to abut against the segment 41 and deflect the segment 41.

In some embodiments, the angle between the guide surface 321a and the direction of movement of the piston 20 ranges from 0 ° to 20 °; it can be understood that the larger the included angle between the guiding surface 321a and the moving direction of the piston 20 is, the larger the included angle between the segment 41 and the moving direction of the piston 20 is after being propped against the guiding surface 321a, the larger the contact area between the segment 41 and the arc extinguishing body 31 is after being inserted into the arc extinguishing body 31, which is not beneficial to the improvement of the insulation property of the device, and the higher the difficulty of inserting the segment 41 into the arc extinguishing body 31 is, the larger the difficulty is obtained after corresponding calculation and test verification, when the included angle is between 0 ° and 20 °, the impact force of the conventional igniter 10 can meet the requirement of inserting the segment 41 into the arc extinguishing body 31.

Referring to fig. 3, in some embodiments, an end surface of the lower housing 130 near the conductor mount 120 is flush with the spacer 322.

It will be appreciated that, to ensure the insulation performance of the device, the conductor fixing member 120 needs to be closely attached to the end face of the lower housing 130 and the partition plate 322, where the conductor fixing member 120 abuts against the end face of the lower housing 130 to prevent the electric arc from leaking through the gap between the two, and the conductor fixing member 120 abuts against the partition plate 322 to ensure that the partition plate 322 separates the arc extinguishing chamber 30 into a plurality of arc extinguishing chambers 30a, so as to prevent the electric arcs carried by the segments 41 in the different arc extinguishing chambers 30a from conducting each other.

Therefore, by flushing the spacer 322 with the end surface of one side of the conductor fixing member 120, only the end surface of one side of the conductor fixing member 120, which is close to the lower housing 130, needs to be a plane, so that the tight fitting with the lower housing 130 and the spacer 322 can be realized at the same time, and the design and processing difficulty of the conductor fixing member 120 are reduced.

Of course, the spacer 322 may also protrude or recess with respect to the end surface of the lower housing 130, as long as the conductor mount 120 has a recess or protrusion corresponding to the spacer 322, so that the conductor mount 120 is tightly attached to the end surface of the lower housing 130 and the spacer 322 at the same time.

Referring to fig. 2, in some embodiments, the fracture of the segment 41 is inserted into the arc extinguishing body 31 in the blocking state.

After the contact between the segment 41 and the arc extinguishing body 31, the arc may be conducted to the metal arc extinguishing body 31 through the contact surface, and if the arc is conducted to the arc extinguishing body 31 and then contacts with the metal powder generated when the conductor 40 is cut off, there is a possibility of re-arcing, and therefore, it is necessary to reduce the contact area between the segment 41 and the arc extinguishing body 31 in order to reduce the risk of re-arcing of the arc.

In the utility model, compared with the scheme that the fracture of the fracture piece 41 is inserted into the arc extinguishing body 31 in the blocking state, compared with the scheme that the fracture piece 41 of the common circuit breaking device directly falls onto the arc extinguishing body 31 and the surface of the fracture piece 41 with larger area is propped against the arc extinguishing body 31 under the action of dead weight, the fracture piece with smaller area of the fracture piece 41 is inserted into the arc extinguishing body 31 in the plugging mode, so that the contact area between the fracture piece 41 and the arc extinguishing body 31 is reduced, the possibility of arc conduction to the arc extinguishing body 31 is reduced, the risk of arc reignition is further reduced, and the insulating capability of the circuit rapid sealing and breaking device is further improved.

In addition, the fracture area of the segment 41 is relatively small, the stress area when the segment 41 is inserted into the arc extinguishing body 31 is relatively small, the segment 41 is easier to be inserted into the arc extinguishing body 31, and the requirement on the igniter 10 is relatively low.

In some embodiments, the arc extinguishing body 31 is a wire or other material capable of extinguishing an arc, and the present utility model is not limited thereto.

Referring to fig. 2, in some embodiments, in the blocking state, a portion of the piston 20 is inserted into the arc extinguishing body 31; the piston 20 and the arc extinguishing body 31 are used for thoroughly isolating the fragment 41 from the corresponding fragment accommodating cavity 21a so as to improve the insulating performance of the device; in addition, the piston 20 can play a certain buffering effect by being inserted into the arc extinguishing body 31, and the buffering effect and the arc extinguishing effect of the piston 20 are optimal when the insertion depth of the piston 20 is less than or equal to 3mm through calculation and test verification.

Referring to fig. 2, 5 and 6, in some embodiments, an end of the piston 20 near the arc extinguishing body 31 has a pillar portion 22, and in a blocking state, the pillar portion 22 is inserted into the arc extinguishing body 31; since the segment 41 is accommodated in the accommodating chamber 21 in the blocking state, it is understood that to insert the segment 41 into the arc extinguishing body 31, it is necessary to plug a part of the piston 20 into the arc extinguishing body 31, and the columnar portion 22 is disposed at one end of the piston 20 near the arc extinguishing body 31, where the columnar portion 22 can reduce the stress area of the bottom end of the piston 20, so that the piston 20 is inserted into the arc extinguishing body 31.

In some embodiments, the width of the portion of the segment 41 is smaller than the width of the other portion of the conductor 40, and in the initial state, the segment 41 is just clamped between the two columnar portions 22, so as to have the effect of installation foolproof, and ensure that the cutting edge 231 of the piston 20 just corresponds to the weak position on the conductor 40 after the piston 20 is installed. Preferably, the height of the columnar portion 22 is 0.5mm or more to ensure engagement with the segment 41, thereby achieving the effect of preventing the mounting from being fool.

Referring to fig. 2 and fig. 3, in some embodiments, an end surface of the lower housing 130 near one side of the conductor fixing member 120, the arc extinguishing body 31 and the partition plate 322 are flush, and at least one of the partition plate 322 and the piston 20 is provided with a recess corresponding to the other, so that one end of the piston 20 near the arc extinguishing body 31 is inserted into the arc extinguishing body 31.

The arc extinguishing body 31 is flush with the end face of the lower shell 130, which is close to the side of the conductor fixing piece 120, so that the arc extinguishing body 31 is tightly attached to the end face of the lower shell 130, which is close to the side of the conductor fixing piece 120, and leakage of an arc from a gap between the lower shell 130 and the conductor fixing piece 120 is avoided, and therefore the insulation strength of the device is improved.

Preferably, the baffle 322 and the piston 20 are provided with avoiding grooves corresponding to the other one for mutual insertion; specifically, the partition 322 has a partition avoiding groove 322a, and the piston 20 has a piston avoiding groove 24.

Only one of the partition plate 322 or the piston 20 is provided with an avoidance groove, and the requirement on the assembly precision is relatively high: taking the example that only the partition plate 322 is provided with the partition plate avoidance groove 322a, if the piston 20 shakes or deviates along the radial direction along with the movement of the piston 20 towards the direction close to the arc extinguishing body 31, the piston 20 can interfere with the partition plate 322 and cannot be inserted into the partition plate avoidance groove 322a, and the width of the partition plate avoidance groove 322a along the radial direction of the piston 20 can be increased, so that the requirements on processing and assembling precision can be reduced, but a gap exists between the piston 20 and the partition plate avoidance groove 322a in a blocking state, which is not beneficial to the improvement of the insulating property;

in contrast, taking the example that only the piston 20 is provided with the piston avoidance groove 24, if the piston 20 deflects along the circumferential direction along with the movement of the piston 20 in the direction approaching to the arc extinguishing body 31, the partition 322 will interfere with the piston 20 and cannot be inserted into the piston avoidance groove 24, and increasing the width of the piston avoidance groove 24 along the circumferential direction of the piston 20 can reduce the requirements on processing and assembly accuracy, but also can cause a gap between the piston 20 and the partition avoidance groove 322a in the blocking state, which is also unfavorable for improving the insulation performance.

In the above embodiment, the avoiding grooves corresponding to the other are formed in the partition 322 and the piston 20, so that in the process of moving the piston 20 in the direction close to the arc extinguishing body 31, the two avoiding grooves are correspondingly inserted, the avoiding space is larger than that of a single avoiding groove in the inserting process, the piston 20 has a certain activity reserve along the radial direction and the circumferential direction of the piston 20, and as long as the offset or deflection of the piston 20 does not exceed the reserve, the inserting can be normally completed, thereby effectively reducing the requirements on the machining and assembling precision of the device.

In some embodiments, the piston relief groove 24 is the same depth as the diaphragm relief groove 322 a; it can be appreciated that the piston avoidance groove 24 and the baffle avoidance groove 322a are mutually spliced to obtain bidirectional movable reserved quantity, if the depths of the two avoidance grooves are different, when the moving stroke of the piston 20 after starting to be spliced exceeds the depth of the avoidance groove with smaller depth, the actual splicing effect is the same as that of the single avoidance groove, and only the avoidance groove with larger depth can provide unidirectional movable reserved quantity for the piston 20.

And through setting up the piston and dodging the groove 24 and dodging the groove 322a with the baffle and equal, dodging the total depth of groove under certain circumstances in two, can make the piston 20 have the stroke maximize of two-way activity reserve in grafting in-process to avoid the condition emergence that piston 20 interfered with baffle 322 as far as possible, effectively reduce the requirement to device processing, assembly accuracy.

Referring to fig. 1 and 3, in some embodiments, the partition assembly 32 divides the arc extinguishing chamber 30 into two arc extinguishing chambers 30a, and the protrusion 321 corresponds to a center position of the piston 20 separating the partial conductor 40, so as to separate the piston 20 from the partial conductor 40 into two fragments 41 with equal lengths.

The two cut fragments 41 have equal length, so that the condition that the required accommodating space is increased due to the length process of one fragment 41 can be avoided, and the volume of the device is reduced.

Referring to fig. 1, in some embodiments, in an initial state, the cutting portion 23 and the protruding portion 321 are both abutted against the conductor 40; on the one hand, after the ignition tool 10 is ignited, the piston 20 can cut off the corresponding weak position through the cutting edge 231 at the first time, thereby forming an isolated insulation port between the conductors 40 to complete the cutting of the circuit, on the other hand, after the piston 20 cuts off and further moves down part of the conductors 40, the part of the conductors 40 rotates around the cutting edge 321b under the extrusion action of the piston 20, at this time, the fracture of the fracture 41 is far away from the fracture of the conductors 40 at a faster speed, and meanwhile, the cutting part 23 can be blocked between the fracture 41 and the fracture of the conductors 40 to weaken and block the arc, thereby enhancing the insulation performance.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. The utility model provides a circuit quick seal cutting device, its characterized in that includes casing (100), be provided with igniter (10), piston (20) and conductor (40) in casing (100), conductor (40) run through casing (100), igniter (10) and piston (20) are located the same side of conductor (40), still offered in casing (100) and be located explosion chamber (30) of conductor (40) opposite side, set firmly baffle subassembly (32) in explosion chamber (30) to with explosion chamber (30) are separated into a plurality of arc extinguishing chamber (30 a), all be equipped with mutually independent arc extinguishing body (31) in explosion chamber (30 a);

the igniter (10) can drive the piston (20) to move to a blocking state in a direction approaching to the arc extinguishing body (31) so as to cut off and divide part of the conductor (40) through the piston (20) to form a plurality of fragments (41), and each fragment (41) corresponds to one arc extinguishing cavity (30 a);

in the blocking state, the piston (20), the baffle plate assembly (32) and the arc extinguishing body (31) jointly isolate the fragments (41) from the corresponding arc extinguishing cavities (30 a).

2. The quick seal shut-off device according to claim 1, wherein the housing (100) comprises an upper housing (110), a conductor fixing member (120) and a lower housing (130) which can be mutually fixed, the conductor (40) is fixedly arranged on the conductor fixing member (120), the arc extinguishing chamber (30) is arranged on the lower housing (130), and the partition plate assembly (32) can abut against the conductor fixing member (120) to divide the arc extinguishing chamber (30) into a plurality of arc extinguishing chambers (30 a).

3. The quick circuit sealing and cutting device according to claim 2, wherein the partition board assembly (32) comprises a partition board (322) and a protruding portion (321), the conductor fixing piece (120) is provided with a through hole (121) in a penetrating manner, the piston (20) can be in sliding fit with the inner wall of the through hole (121), and a containing chamber (21) is provided on one side of the piston (20) close to the arc extinguishing body (31);

in a blocking state, the piston (20) is abutted against the arc extinguishing body (31), and the protruding part (321) is inserted into the accommodating chamber (21) so as to jointly isolate the fragment (41) in the corresponding arc extinguishing cavity (30 a) through the piston (20), the protruding part (321) and the arc extinguishing body (31).

4. A circuit rapid seal breaking device according to claim 3, wherein in the blocking condition, the side face of the protruding portion (321) is in interference fit with the inner side wall of the accommodating chamber (21) so as to divide the accommodating chamber (21) into a plurality of fragment accommodating chambers (21 a) respectively located in each arc extinguishing chamber (30 a), and the fragments (41) are accommodated in the corresponding fragment accommodating chambers (21 a).

5. A circuit rapid seal-breaking device according to claim 3, characterized in that the protruding portion (321) comprises a cutting edge (321 b) located near the side of the conductor (40) and a plurality of guiding surfaces (321 a) in one-to-one correspondence with the arc extinguishing chambers (30 a), the cutting edge (321 b) being capable of cutting the portion of the conductor (40) from which the piston (20) is cut into a plurality of the fragments (41), the guiding surfaces (321 a) being capable of guiding the fragments (41) to the corresponding arc extinguishing chambers (30 a).

6. A circuit rapid seal cutoff device according to claim 3 wherein a side end face of the lower housing (130) adjacent to the conductor mount (120) is flush with the bulkhead (322).

7. The circuit rapid seal-breaking device according to claim 6, characterized in that in the blocking state, part of the piston (20) is inserted into the arc-extinguishing body (31).

8. The quick seal cutting device according to claim 7, wherein an end of the piston (20) adjacent to the arc extinguishing body (31) has a columnar portion (22), and in a blocking state, the columnar portion (22) is inserted into the arc extinguishing body (31).

9. The quick seal breaking device according to claim 7, wherein the lower housing (130) is close to an end face of one side of the conductor fixing member (120), the arc extinguishing body (31) and the partition plate (322) and is flush, and at least one of the partition plate (322) and the piston (20) is provided with a avoiding groove corresponding to the other, so that one end of the piston (20) close to the arc extinguishing body (31) is inserted into the arc extinguishing body (31).

10. The circuit rapid seal cutoff device according to any of claims 1-9, wherein the barrier assembly (32) separates the arc chute (30) into two arc chute chambers (30 a).