CN210073498U - Resistor string and resistor disc thereof - Google Patents
Resistor string and resistor disc thereof Download PDFInfo
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- CN210073498U CN210073498U CN201921330744.4U CN201921330744U CN210073498U CN 210073498 U CN210073498 U CN 210073498U CN 201921330744 U CN201921330744 U CN 201921330744U CN 210073498 U CN210073498 U CN 210073498U
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Abstract
The utility model discloses a resistor string and a resistor disc thereof, wherein the resistor disc is a non-circular resistor disc which has two ends with the longest dimension and two sides with the shortest dimension; one side in the both sides of resistance card is for closing on the side, it is for to close on the side the resistance card is towards the side of explosion chamber axis. The resistance card provided by the utility model reduces the requirements of the arc extinguish chamber in the diameter direction; and, the need for an arc chute in the length direction is reduced. Through above-mentioned structure, effectively improved the miniaturized setting of explosion chamber, reduced the restriction to the circuit breaker miniaturization to realize the miniaturization of circuit breaker.
Description
Technical Field
The utility model relates to a circuit breaker equipment technical field, in particular to resistor string and resistance card thereof.
Background
In order to reduce the occupied space of power transmission and distribution equipment, reduce the construction cost and reduce the influence on the environment, the miniaturization becomes an important development direction of the current circuit breaker. Generally, SF6 circuit breakers of 363kV grade and above are required to be provided with a closing resistor, and when the circuit breaker adopts a closing resistor structure, the miniaturization arrangement of the circuit breaker is restricted.
The switching-on resistor is connected with the main fracture of the arc extinguish chamber of the circuit breaker in parallel, when the circuit breaker is switched on, the fracture of the switching-on resistor is switched on first 8-12 ms before the main fracture of the arc extinguish chamber is switched on, the switching-on resistor is put into use in advance, overvoltage energy generated by switching-on is absorbed, and the influence of overvoltage on an electric power system is effectively reduced.
As shown in fig. 1, both ends of the resistor string formed by the resistor discs are provided with flange structures, and the arc extinguish chamber has a housing 02 and a shielding structure 03, which form a space with a circular cross section for accommodating the resistor break 01 and the resistor string. The resistors in the existing arc extinguish chamber are all arranged into round resistor discs 04, the resistor discs 04 are connected in series to form a group of resistor strings which are supported by an insulating rod, then the plurality of groups of resistor strings are connected in parallel with a main fracture of the arc extinguish chamber, when the circuit breaker is switched on, the switching-on resistor fracture is switched on firstly 8-12 ms before the main fracture of the arc extinguish chamber is switched on, the resistor strings are put into use in advance, and overvoltage energy generated by switching-on is absorbed. However, the circular resistive sheet 04 has a strict requirement on space arrangement, and the radius R1 of the resistive sheet 04 and the gap D1 between the resistive sheet 04 and the resistive fracture 01 need to meet set requirements so as to meet the requirements on heat capacity and volume and insulation performance. When the requirements of heat capacity volume and insulating property are met, the resistors cannot be reasonably arranged or the space of an arc extinguish chamber is occupied greatly, so that the miniaturization of the circuit breaker is restricted.
In another embodiment, the resistor string may also be arranged in a cantilever structure, and an exhaust hole needs to be arranged in the space for accommodating the resistor string, and also a gap between the resistor sheet and the exhaust hole needs to meet a set requirement, and the resistor string cannot block the exhaust hole. And the radius of the resistor disc also needs to meet the heat capacity volume requirement.
Therefore, how to realize miniaturization is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a resistance card to realize miniaturization. The utility model also provides a resistor string that has above-mentioned resistance card.
In order to achieve the above object, the utility model provides a following technical scheme:
a resistor disc is a non-circular resistor disc and comprises two ends with the longest dimension and two sides with the shortest dimension;
one side in the both sides of resistance card is for closing on the side, it is for to close on the side the resistance card is towards the side of explosion chamber axis.
Optionally, in the above-mentioned resistor sheet, a cross section of the resistor sheet is a closed structure formed by connecting a plurality of sections of curves with different curvature radii;
the curve of the largest radius of curvature is convex and is a cross section of the adjacent side.
Optionally, in the above resistive sheet, the resistive sheet is an ellipse, and two sides of the shortest dimension of the resistive sheet are two sides of the short axis thereof.
Optionally, in the above resistive sheet, the resistive sheet is a strip, and two sides of the shortest dimension of the resistive sheet are two sides of the width direction of the resistive sheet.
Optionally, in the above-mentioned resistor sheet, a cross section of the resistor sheet is a closed structure formed by connecting a plurality of sections of curves with different curvature radii;
the section of the adjacent side surface is a curve which is arranged in a concave manner.
Optionally, in the above resistor disc, the resistor disc is shaped in a special manner, and two sides of the shortest dimension of the resistor disc are two sides of the resistor disc in the width direction.
Optionally, in the above-mentioned resistor sheet, a cross section of the resistor sheet has an axisymmetric structure.
Optionally, in the above resistor disc, the resistor disc has a plurality of support holes for the insulating rods to pass through.
Optionally, in the resistor disc, the plurality of support holes are symmetrically disposed on the resistor disc.
Optionally, in the resistor disc, the support holes are circular holes.
Optionally, in the above resistor disc, the resistor disc has a support hole which is non-circular and can be circumferentially positioned with the insulating rod.
The utility model also provides a resistor string, including insulating rod and resistance card, the resistance card be as above-mentioned arbitrary resistance card.
According to the above technical scheme, the utility model provides a resistance card, resistance card and other structures (like resistance fracture or gas vent) are located the installation space of explosion chamber, and this installation space outside is provided with shell and shielding structure isotructure, consequently, has restricted installation space's overall structure. Because the resistance card is non-circular resistance card to one side in the both sides of resistance card is for being close to the side, and close to the side for the side of resistance card towards the explosion chamber axis, consequently, make the shortest dimension direction of resistance card arrange along the array direction of resistance card and explosion chamber axis. Since the space for accommodating the resistor disc also needs to be provided with other structures (such as a resistor fracture or an exhaust port) which need to cover the position of the axis of the arc extinguishing chamber, the space (similar to the shape of a crescent) for installing the resistor disc is limited. The shortest dimension direction of the resistance card is arranged along the arrangement direction of the resistance card and the axis of the arc extinguish chamber, so that the restriction of the resistance card on the space for accommodating the resistance card is reduced, the installation space required for installing the resistance card and the resistance fracture is effectively shortened, and the requirement of the arc extinguish chamber in the diameter direction is reduced; and the resistance card has the both ends of longest dimension, and the longest dimension direction of resistance card does not arrange along the array direction of resistance card and explosion chamber axis, satisfies the interval between resistance card and other structures and satisfies the required basis, can effectively enlarge the cross-sectional area of resistance card to enlarge the heat capacity volume of resistance card, and then realize that the series connection less resistance card can satisfy the requirement of closing an overvoltage to heat capacity, effectively reduced the length demand of resistance string, reduced the demand of explosion chamber in length direction. Through above-mentioned structure, effectively improved the miniaturized setting of explosion chamber, reduced the restriction to the circuit breaker miniaturization to realize the miniaturization of circuit breaker.
The utility model also provides a resistor string that has above-mentioned resistance card. Since the resistor disc has the technical effects, the resistor string with the resistor disc also has the same technical effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only 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 diagram of a mounting structure of a resistor disc provided in the prior art;
fig. 2 is a schematic front view of a first mounting structure of a resistor disc according to an embodiment of the present invention;
fig. 3 is a schematic side view of a second mounting structure of a resistor disc according to an embodiment of the present invention;
fig. 4 is a schematic front view of a second mounting structure of a resistor disc according to an embodiment of the present invention;
fig. 5 is a schematic side view of a second mounting structure of a resistor disc according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a first resistance card according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a second resistance card according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a third resistor disc provided in an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a fourth resistance card according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a fourth resistance card according to an embodiment of the present invention.
Detailed Description
The utility model discloses a resistance card to realize the miniaturization. The utility model also provides a resistor string that has above-mentioned resistance card.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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. 2-5, an embodiment of the present invention provides a non-circular resistor, which has two ends with the longest dimension and two sides with the shortest dimension; one side in the both sides of resistance card is for closing on the side, closes on the side for the side of resistance card towards the explosion chamber axis.
The embodiment of the utility model provides a resistance card, resistance card and other structures (like resistance fracture 1 or gas vent 8) are located the installation space of explosion chamber, and this installation space outside is provided with shell 2 and shielding structure 3 isotructures, consequently, has restricted installation space's overall structure. Because the resistance card is non-circular resistance card to one side in the both sides of resistance card is for being close to the side, and close to the side for the side of resistance card towards the explosion chamber axis, consequently, make the shortest dimension direction of resistance card arrange along the array direction of resistance card and explosion chamber axis. Since the space for accommodating the resistor disc needs to be provided with other structures (such as the resistor break 1 or the exhaust port 8) which need to cover the position of the axis of the arc-extinguishing chamber, the space (similar to the shape of a crescent) for installing the resistor disc is limited. The shortest dimension direction of the resistance card is arranged along the arrangement direction of the resistance card and the axis of the arc extinguish chamber, so that the restriction of the resistance card on the space for accommodating the resistance card is reduced, the installation space required for installing the resistance card and the resistance fracture 1 is effectively shortened, and the requirement of the arc extinguish chamber in the diameter direction is reduced; and the resistance card has the both ends of longest dimension, and the longest dimension direction of resistance card does not arrange along the array direction of resistance card and explosion chamber axis, satisfies the interval between resistance card and other structures and satisfies the required basis, can effectively enlarge the cross-sectional area of resistance card to enlarge the heat capacity volume of resistance card, and then realize that the series connection less resistance card can satisfy the requirement of closing an overvoltage to heat capacity, effectively reduced the length demand of resistance string, reduced the demand of explosion chamber in length direction. Through above-mentioned structure, effectively improved the miniaturized setting of explosion chamber, reduced the restriction to the circuit breaker miniaturization to realize the miniaturization of circuit breaker.
It can be understood that the distance D2 between the resistor disc and the resistor break 1 needs to satisfy the insulation requirement; the distance between the resistor disc and the exhaust port 8 needs to meet the positive value requirement so as to avoid the shielding of the resistor disc on the exhaust port 8.
As shown in fig. 2 and 3, in the present embodiment, a resistor break 1 is provided in the space for accommodating the resistor disc; still include in the circuit breaker: the resistor flanges 5 are arranged at two ends of the resistor string 4; the resistor fracture 1 is positioned between two resistor flanges 5; the resistance flange 5 is fixed in the shell 2 of the arc extinguish chamber through a supporting structure 6; and the shielding structure 3 connected with the resistor flange 5, the resistor fracture 1 and the resistor string 4 are positioned inside the shielding structure 3.
At least one end of the resistor string 4 is provided with a compression spring structure 7; one end of the compression spring structure 7, which is far away from the resistor string 4, is connected with the resistor flange 5. Through setting up compression spring structure 7, realize the effect of the pretension of resistance card in resistance string 4 to can play the damping effect. The resistance cards in the resistance string 4 are mutually compressed under the acting force of the compression spring structure 7, wherein the pretightening force (elastic restoring force) provided by the compression spring structure 7 is in direct proportion to the number of the resistance cards in the resistance string 4.
As shown in fig. 4 and 5, in the present embodiment, the resistor string 4 is in a cantilever arrangement structure; the mounting structure further includes: the arc extinguish chamber static side flange 5 'is arranged at one end of the resistor string 4, and the arc extinguish chamber static side flange 5' is provided with an exhaust hole 8; the arc extinguish chamber static side flange 5' is fixed in the shell 2 of the arc extinguish chamber through a supporting structure 6; the shielding structure 3 is connected with the arc extinguish chamber static side flange 5', and the resistor string 4 is positioned inside the shielding structure 3; and a resistance shielding structure 9 disposed at the other end of the resistor string 4.
A compression spring structure 7 is arranged between one end of the resistor string 4 and the arc extinguish chamber static side flange 5'; and/or a compression spring structure 7 is arranged between the other end of the resistor string 4 and the resistor shielding structure 9. In the same way, by arranging the compression spring structure 7, the pre-tightening force of the resistor disc in the resistor string 4 is realized, and the damping effect can be realized. The resistance cards in the resistance string 4 are mutually compressed under the acting force of the compression spring structure 7, wherein the pretightening force (elastic restoring force) provided by the compression spring structure 7 is in direct proportion to the number of the resistance cards in the resistance string 4.
The section of the resistance card is a closed structure formed by connecting a plurality of sections of curves with different curvature radiuses; the curve of the largest radius of curvature R2 is convex and is a cross section of the adjacent side. Because the curvature radius R2 of the adjacent side is larger, the size limitation of the distance D2 between the resistor disc and the resistor fracture 1 can be reduced, the requirement of the arc extinguish chamber in the diameter direction is further reduced, and the miniaturization arrangement of the circuit breaker is further improved.
As shown in fig. 6, the resistive sheet has an oval shape, and both sides of the shortest dimension of the resistive sheet are both sides of the minor axis thereof. That is, the shortest dimension direction of the resistive sheet is the direction of its minor axis, and the longest dimension direction of the resistive sheet is the direction of its major axis. The side face close to is one side of the resistance card short shaft, and the other side of the resistance card short shaft faces the inner wall of the installation space, so that the inner wall of the arc structure of the installation space is matched with the resistance card short shaft.
As shown in fig. 7, the resistive sheet is a strip, and both sides of the shortest dimension of the resistive sheet are both sides in the width direction. Wherein, the cross section of the strip shape is formed by connecting two parallel straight line sections and arcs respectively connecting the end parts of the two straight line sections. The distance between the two parallel straight line segments is in the width direction of the resistor disc, and the extending direction of the straight line segments is in the length direction of the resistor disc. Namely, the adjacent side surface is a plane on which a straight line segment in the cross section of the resistor disc is located.
As shown in fig. 8, the resistive sheet is shaped in a special manner, and both sides of the shortest dimension of the resistive sheet are both sides in the width direction thereof. The special shape is a shape other than a circle, an ellipse, a strip and the like. In this embodiment, the cross section of the strip is a closed structure formed by three arc segments and one straight segment which are sequentially connected. The plane where the straight line segment is located is the adjacent side face, the three arc segments are sequentially connected, and the diameter of the middle arc segment is larger than the diameters of the arc segments at the two ends. Wherein, the diameters of the arc line segments at the two ends can be the same.
The section of the resistance card can also be a closed structure formed by connecting a plurality of sections of curves with different curvature radiuses; the section of the adjacent side surface is a curve which is arranged in a concave manner.
As shown in fig. 9, the resistive sheet is crescent, the cross section of the resistive sheet is composed of four arcs connected in sequence, wherein two sides of the shortest dimension are two short arcs bent symmetrically, the cross section near the side is an inward concave arc, and the cross section of the surface opposite to the side is an outward convex arc.
In order to enlarge the cross section area of the resistor disc as much as possible and thus enlarge the heat capacity volume of the resistor disc, the connecting line of the two ends of the longest dimension of the resistor disc is perpendicular to the connecting line of the two sides of the shortest dimension of the resistor disc. Namely, the direction of the longest dimension of the resistor is perpendicular to the arrangement direction of the resistor and the resistor fracture 1, so that the limitation on the longest dimension of the resistor is effectively reduced.
In this embodiment, the resistor has a plurality of support holes 11 for the insulation rods to pass through. Through the arrangement, the plurality of resistance cards are supported by the plurality of insulating rods, so that the resistance cards are more stably assembled, the anti-seismic effect of the resistance cards is effectively improved, the resistance cards have better impact resistance, and the resistance cards are safe, stable and reliable to use.
For the purpose of uniform support, the plurality of support holes 11 are symmetrically disposed on the resistor sheet.
In this embodiment, the resistor has two support holes 11.
Among them, the support hole 11 is preferably a circular hole to facilitate processing. The support holes 11 may be formed as non-circular holes in order to improve the positioning effect.
In this embodiment, the cross section of the resistance chip is an axisymmetric structure. As shown in fig. 6, 7, 8 and 9, in these embodiments, the cross section of the resistive sheet has an axisymmetric structure. That is, the resistor pieces can be assembled into a resistor string without being divided into front and back surfaces. Through the arrangement, the resistor disc is convenient to process and the resistor string is convenient to assemble.
In another embodiment, the resistor sheet is provided with a support hole which is non-circular and can be circumferentially positioned with the insulating rod.
As shown in fig. 10, the cross section of the resistance sheet may also be configured as a non-axisymmetric structure, which is not repeated herein and is within the protection range. The embodiment of the utility model provides a still provide a resistor string, including insulating rod and resistance card, the resistance card is as above-mentioned any kind of resistance card. Since the resistor disc has the technical effects, the resistor string with the resistor disc also has the same technical effects.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
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 (10)
1. A resistor disc is characterized in that the resistor disc is a non-circular resistor disc, and the resistor disc is provided with two ends with the longest dimension and two sides with the shortest dimension;
one side in the both sides of resistance card is for closing on the side, it is for to close on the side the resistance card is towards the side of explosion chamber axis.
2. The resistor disc as claimed in claim 1, wherein the cross section of the resistor disc is a closed structure formed by connecting a plurality of sections of curves with different curvature radii;
the curve of the largest radius of curvature is convex and is a cross section of the adjacent side.
3. The resistor sheet according to claim 1, wherein the resistor sheet is oval, and the two sides of the shortest dimension of the resistor sheet are the two sides of the short axis of the resistor sheet;
or the resistance card is in a strip shape, two sides of the shortest dimension of the resistance card are two sides of the resistance card in the width direction, and the adjacent side face is a plane;
or the resistance card is special-shaped, two sides of the shortest dimension of the resistance card are two sides of the resistance card in the width direction, and the adjacent side face is a plane.
4. The resistor disc as claimed in claim 1, wherein the cross section of the resistor disc is a closed structure formed by connecting a plurality of sections of curves with different curvature radii;
the section of the adjacent side surface is a curve which is arranged in a concave manner.
5. The resistive sheet of claim 1, wherein the cross-section of the resistive sheet is an axisymmetric structure.
6. A resistive sheet according to any one of claims 1 to 5, wherein the sheet has a plurality of support holes (11) through which the insulating rods pass.
7. The resistor sheet according to claim 6, wherein the plurality of support holes are symmetrically arranged on the resistor sheet.
8. The resistor sheet of claim 6, wherein the support holes are circular holes.
9. A resistor sheet according to any one of claims 1 to 5, wherein the resistor sheet has a support hole which is non-circular and can be positioned circumferentially with respect to the insulating rod.
10. A resistor string comprising an insulating rod and a resistor disc, wherein the resistor disc is the resistor disc according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921330744.4U CN210073498U (en) | 2019-08-15 | 2019-08-15 | Resistor string and resistor disc thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921330744.4U CN210073498U (en) | 2019-08-15 | 2019-08-15 | Resistor string and resistor disc thereof |
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| Publication Number | Publication Date |
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| CN210073498U true CN210073498U (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921330744.4U Active CN210073498U (en) | 2019-08-15 | 2019-08-15 | Resistor string and resistor disc thereof |
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| CN (1) | CN210073498U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397264A (en) * | 2019-08-15 | 2021-02-23 | 西安西电开关电气有限公司 | Resistor string and resistor disc thereof |
-
2019
- 2019-08-15 CN CN201921330744.4U patent/CN210073498U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397264A (en) * | 2019-08-15 | 2021-02-23 | 西安西电开关电气有限公司 | Resistor string and resistor disc thereof |
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