CN212010833U - Circuit breaker and nozzle used for same - Google Patents
Circuit breaker and nozzle used for same Download PDFInfo
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- CN212010833U CN212010833U CN202021234187.9U CN202021234187U CN212010833U CN 212010833 U CN212010833 U CN 212010833U CN 202021234187 U CN202021234187 U CN 202021234187U CN 212010833 U CN212010833 U CN 212010833U
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- circuit breaker
- nozzle
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- arc
- arc striking
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Abstract
The utility model discloses a circuit breaker and spout for it, including a plurality of holes, it is a plurality of the hole is the annular around a central axis and arranges, annular inner space is electric arc region, the one end intercommunication expansion chamber of hole, its other end intercommunication electric arc region on the annular right circular cross-section, all the extension line of the axis of hole all not with the central axis is alternately, all or partly the axis incline direction of hole is unanimous. The utility model provides a spout for circuit breaker, the central axis that all axis of hole's extension lines all do not all pass through the spout, and the axis incline direction of all or partial holes is unanimous. This arrangement rotationally misaligns the gas flow into the arc region to reduce the dead volume created by the impingement of gas flowing through the holes. The volume of the dead zone is effectively reduced, and therefore the breaking capacity of the circuit breaker is improved under the condition that the rest structures of the circuit breaker are unchanged.
Description
Technical Field
The utility model relates to a circuit breaker spare part technical field especially relates to a circuit breaker and use spout thereof.
Background
The nozzle is a core element of an arc extinguishing chamber of the gas circuit breaker, and the structure of the nozzle has great influence on the pressure of blowing, so that the nozzle is closely related to the arc extinguishing capability of the circuit breaker.
The circuit breaker of the large-capacity generator is usually far larger in on-off current than a circuit breaker and can reach hundreds of kiloamperes, and in order to prevent the on-off distance from being enlarged due to the fact that an arc contact is opened, the arc resistance is enlarged, and energy is too large, a fixed on-off distance structure for installing an arc striking device is usually adopted. At the same time, in order to enhance the cooling of the arc column and the arc root, it is common to provide the arc starting device with double nozzles which occur in pairs.
The fixed opening distance double-nozzle structure has the advantages that the air flow arc blowing between the nozzles is stable, an air flow stagnation area (dead area) which cannot be blown by air flow cannot be avoided between the fractures, and the insulation recovery of the dead area position is difficult to establish, so that the opening and closing performance is influenced.
Therefore, how to provide a nozzle for a circuit breaker to effectively reduce the volume of a dead zone, so as to improve the breaking capacity of the circuit breaker under the condition that the rest structures of the circuit breaker are not changed is a technical problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a spout for circuit breaker to realize effectively reducing the dead zone volume, thereby promote the ability of opening and shutting of circuit breaker under the unchangeable circumstances of all the other structures of circuit breaker. Another object of the utility model is to provide an adopt above-mentioned circuit breaker of spout for circuit breaker.
In order to achieve the above object, the utility model provides a following technical scheme:
a nozzle for a circuit breaker comprises a plurality of holes which are annularly arranged around a central axis, the annular inner space is an electric arc area, one end of each hole is communicated with an expansion chamber, the other end of each hole is communicated with the electric arc area,
on the right circular cross section of the ring shape,
the extension lines of the axes of all the holes do not intersect with the central axis,
all or part of the holes are inclined in the same direction.
Preferably, in the circular right circular section, the axis of the hole is inclined at 0-40 °.
Preferably, the number of the holes is not less than 3.
Preferably, the hole has two side wall surfaces inclined in different directions.
Preferably, the inclined directions of the two side wall surfaces of the hole tend to contract as approaching the central axis.
Preferably, an extension of the bottom surface of the hole is at a non-right angle to the central axis.
The utility model also provides a breaker, which comprises a movable arc contact, a first arc striking device and a second arc striking device which are arranged in a mirror image way and are arranged up and down, wherein the movable arc contact is positioned in the middle channel of the first arc striking device and the middle channel of the second arc striking device,
the first arc striking device is provided with the nozzle for the circuit breaker as any one of the above, and is a nozzle for the first circuit breaker,
the second arc striking device is provided with the nozzle for the circuit breaker as any one of the above, and is a nozzle for a second circuit breaker,
the nozzle for the first circuit breaker and the nozzle for the second circuit breaker are arranged in a mirror image mode,
the central axes of the first circuit breaker nozzle and the second circuit breaker nozzle are coincident, and are coincident with the axis of the moving arc contact.
Preferably, the bottom surface of the hole of the first circuit breaker nozzle is matched with an arc striking surface of the first arc striking device, which is located at the first circuit breaker nozzle.
Preferably, the bottom surface of the hole of the second circuit breaker nozzle is matched with an arc striking surface of the second arc striking device, which is located at the second circuit breaker nozzle.
The utility model provides a nozzle for a circuit breaker, which comprises a plurality of holes which are annularly arranged around a central axis, the annular inner space is an electric arc area, one end of each hole is communicated with an expansion chamber, the other end of each hole is communicated with the electric arc area,
on the right circular cross section of the ring shape,
the extension lines of the axes of all the holes do not intersect with the central axis,
all or part of the holes are inclined in the same direction.
The utility model provides a spout for circuit breaker, the central axis that all axis of hole's extension lines all do not all pass through the spout, and the axis incline direction of all or partial holes is unanimous. This arrangement rotationally misaligns the gas flow into the arc region to reduce the dead volume created by the impingement of gas flowing through the holes. The volume of the dead zone is effectively reduced, and therefore the breaking capacity of the circuit breaker is improved under the condition that the rest structures of the circuit breaker are unchanged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a nozzle for a circuit breaker, which is applied to a circuit breaker according to an embodiment of the present invention;
fig. 2 is a schematic view of a top view structure of a nozzle for a circuit breaker, which is applied to the circuit breaker according to an embodiment of the present invention.
In the above FIGS. 1-2:
the arc striking device comprises a hole 1, a first end surface 101, a second end surface 102, a bottom surface 103, an arc striking device 2, a moving arc contact 3, an arc striking surface 4 and a central axis 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural view illustrating a nozzle for a circuit breaker applied to the circuit breaker according to an embodiment of the present invention; fig. 2 is a schematic view of a top view structure of a nozzle for a circuit breaker, which is applied to the circuit breaker according to an embodiment of the present invention.
The nozzle for the circuit breaker provided by the embodiment of the utility model comprises a plurality of holes 1, the holes 1 are annularly arranged around a central axis 5, the annular inner space is an electric arc area, one end of each hole 1 is communicated with an expansion chamber, the other end is communicated with the electric arc area,
in a circular right circular cross section, as shown in figure 2,
the extension lines of the axes of all the holes 1 do not intersect with the central axis 5,
the axes of all or part of the holes 1 are inclined in the same direction.
The embodiment of the utility model provides a spout for circuit breaker, the extension line of all hole 1's axis all does not all pass through the central axis 5 of spout, and all or partial hole 1's axis incline direction is unanimous. This arrangement rotationally offsets the gas flow into the arc region to reduce the dead volume created by the impingement of gas through the holes 1. The volume of the dead zone is effectively reduced, and therefore the breaking capacity of the circuit breaker is improved under the condition that the rest structures of the circuit breaker are unchanged.
In order to further optimize the solution, the axis of the hole 1 is inclined in the direction of 0-40 ° in a circular right circular section, as shown in fig. 2. Specifically, the number of the holes 1 is not less than 3.
To further optimize the above solution, the two side wall surfaces of the hole 1 have different inclination directions. The inclined directions of the two side wall surfaces of the hole 1 tend to contract as approaching the central axis 5. Specifically, the hole 1 of the nozzle comprises a first end surface 101 and a second end surface 102, the inclination directions of the first end surface 101 and the second end surface 102 are not consistent, and the gas flow tends to be contracted when the gas flow blows arcs in the radial direction. The effect is better.
To further optimize the solution, the extension of the bottom surface 103 of the cavity 1 is at a non-right angle to the central axis 5. And the air flow is guided to directly blow to the arc root position on the arc striking device 2 by matching with the arc striking surface 4 of the arc striking device 2. The effect is better.
The embodiment of the utility model provides a spout for circuit breaker, its hole 1 can be formed for the recess, can inject the air current flow direction and with gas dispersion. Specifically, for the spout part between the fracture can be divided into the concave-convex area, because the setting of a plurality of recesses, be the boss between two adjacent recesses, form the concave-convex area, can inject the air current flow direction, with gas dispersion division going to blow electric arc.
The embodiment of the utility model also provides a circuit breaker, which comprises a movable arc contact 3 and two arc striking devices 2 arranged in a mirror image manner, namely a first arc striking device and a second arc striking device which are arranged up and down, wherein the movable arc contact 3 is positioned in the middle channel of the first arc striking device and the middle channel of the second arc striking device,
the first arc striking device is provided with the nozzle for the circuit breaker according to any one of the above embodiments, which is the nozzle for the first circuit breaker,
the second arc striking device is provided with the nozzle for the circuit breaker according to any one of the above embodiments, and is a nozzle for a second circuit breaker,
the nozzle for the first breaker and the nozzle for the second breaker are arranged in a mirror image manner,
the central axes 5 of the first breaker nozzle and the second breaker nozzle are coincided with each other and are coincided with the axis of the moving arc contact 3.
In order to further optimize the solution described above, the bottom surface 103 of the hole 1 of the first circuit breaker nozzle cooperates with the arc striking surface 4 of the first arc striking device at the first circuit breaker nozzle. The bottom surface 103 of the hole 1 of the second circuit breaker nozzle cooperates with the arc striking surface 4 of the second arc striking device at the second circuit breaker nozzle. The extension of the bottom surface of the hole 1 is at a non-right angle to the central axis 5. And the air flow is guided to directly blow to the arc root position on the arc striking device 2 by matching with the arc striking surface 4 of the arc striking device 2. The effect is better.
The embodiment of the utility model provides a spout for circuit breaker, it has an annular inner space around the 5 formation of central axis, and annular inner space is the electric arc region.
The spouts are usually used in pairs in a mirror image mode, the paired spouts form a plurality of circumferentially uniformly distributed holes 1, one ends of the holes 1 are connected with the expansion chamber, the other ends of the holes 1 are connected with the electric arc area, the extension lines of the axes of all the holes 1 do not pass through the central axis 5 of the spout, and all or part of the holes are consistent in inclination direction. This arrangement rotationally offsets the gas flow into the arc region to reduce the dead volume created by the impingement of gas through the holes 1.
The embodiment of the utility model provides a spout for circuit breaker for decide opening distance structure, including two upper and lower striking devices 2, two upper and lower spouts 1 and moving arc contact 3.
The inclined direction of the axis of the holes 1 is 0-40 degrees, and the number of the holes 1 is not less than 3.
The first end surface 101 and the second end surface 102 of the hole 1 of the nozzle are not consistent in inclination direction, the airflow tends to be contracted when blowing arc in the radial direction, and the bottom surface 103 of the hole is not at a right angle with the central axis 5 and is matched with the arc striking surface 4 of the arc striking device 2 to guide the airflow to directly blow to the arc root position on the arc striking device 2.
The upper and lower nozzles 1 may be arranged in pairs of images or may be arranged individually, depending on the specific structure.
Adopt the embodiment of the utility model provides a spout for circuit breaker can effectively reduce the dead zone volume to promote the breaking capacity of circuit breaker under the unchangeable condition of all the other structures.
1. The nozzle part between the fractures can be divided into concave-convex areas, the flow direction of the air flow can be limited, and the air is dispersed to blow electric arcs;
2. the bottom surface of the groove of the nozzle forms an oblique angle with the axial direction, so that the volume of a dead zone generated by gas passing through the dead zone can be reduced, the dead zone is directly blown to the position of the arc root, and the cooling of the arc root is accelerated;
3. the end surfaces of the grooves of the nozzle form oblique angles with the radial direction, the central lines of all the grooves do not pass through the circle center of the nozzle, and part or all of the oblique angles are consistent, so that the airflow can be rotated and dislocated to enter an electric arc region, and the volume of a dead zone generated by the opposite impact of the gas flowing through the dead zone is reduced.
The embodiment of the utility model provides a spout for circuit breaker, the purpose reduces the dead zone volume in the fixed-open distance structure to promote the ability of breaking. Specifically, the dead zone volume is reduced by improving the airflow direction between fractures in the arc quenching process.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A nozzle for a circuit breaker comprises a plurality of holes which are annularly arranged around a central axis, the annular inner space is an electric arc area, one end of each hole is communicated with an expansion chamber, and the other end of each hole is communicated with the electric arc area,
on the right circular cross section of the ring shape,
the extension lines of the axes of all the holes do not intersect with the central axis,
all or part of the holes are inclined in the same direction.
2. The circuit breaker nozzle of claim 1 wherein the axis of said bore is inclined in the range of 0 ° to 40 ° in said circular right circular cross section.
3. The circuit breaker spout of claim 1 wherein said number of holes is no less than 3.
4. The nozzle for a circuit breaker as claimed in claim 1, wherein the inclination directions of both side wall surfaces of said hole are different.
5. The nozzle as claimed in claim 4, wherein the inclined directions of both side wall surfaces of the hole are convergent toward the central axis.
6. The circuit breaker nozzle of claim 1 wherein an extension of a bottom surface of said bore is at a non-perpendicular angle to said central axis.
7. A circuit breaker comprises a movable arc contact, a first arc striking device and a second arc striking device which are arranged in a mirror image mode and are arranged up and down, wherein the movable arc contact is positioned in a middle channel of the first arc striking device and a middle channel of the second arc striking device,
the first arc striking device is provided with the nozzle for the circuit breaker according to any one of claims 1 to 6, which is the nozzle for the first circuit breaker,
the second arc striking device is provided with the nozzle for the circuit breaker according to any one of the claims 1-6, which is a nozzle for a second circuit breaker,
the nozzle for the first circuit breaker and the nozzle for the second circuit breaker are arranged in a mirror image mode,
the central axes of the first circuit breaker nozzle and the second circuit breaker nozzle are coincident, and are coincident with the axis of the moving arc contact.
8. The circuit breaker of claim 7, wherein a bottom surface of the hole of the first breaker spout cooperates with an arc striking surface of the first arc striking device at the first breaker spout.
9. The circuit breaker of claim 7, wherein a bottom surface of the hole of the second circuit breaker spout cooperates with an arc striking surface of the second arc striking device at the second circuit breaker spout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021234187.9U CN212010833U (en) | 2020-06-29 | 2020-06-29 | Circuit breaker and nozzle used for same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021234187.9U CN212010833U (en) | 2020-06-29 | 2020-06-29 | Circuit breaker and nozzle used for same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212010833U true CN212010833U (en) | 2020-11-24 |
Family
ID=73402876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021234187.9U Active CN212010833U (en) | 2020-06-29 | 2020-06-29 | Circuit breaker and nozzle used for same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212010833U (en) |
-
2020
- 2020-06-29 CN CN202021234187.9U patent/CN212010833U/en active Active
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