CN112117074A - Closing resistor and closing resistor assembling structure using same - Google Patents

Closing resistor and closing resistor assembling structure using same Download PDF

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Publication number
CN112117074A
CN112117074A CN202010671142.6A CN202010671142A CN112117074A CN 112117074 A CN112117074 A CN 112117074A CN 202010671142 A CN202010671142 A CN 202010671142A CN 112117074 A CN112117074 A CN 112117074A
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China
Prior art keywords
connecting seat
resistor
closing
closing resistor
insulating sheath
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Granted
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CN202010671142.6A
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Chinese (zh)
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CN112117074B (en
Inventor
张超军
江经华
段晓辉
王辉
赵建磊
李俊锋
张洪铁
孙清超
王祯
张银穗
姚明明
李�杰
张丕沛
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Shandong Electric Power Co Ltd
Pinggao Group Co Ltd
Original Assignee
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Shandong Electric Power Co Ltd
Pinggao Group Co Ltd
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Priority to CN202010671142.6A priority Critical patent/CN112117074B/en
Publication of CN112117074A publication Critical patent/CN112117074A/en
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Publication of CN112117074B publication Critical patent/CN112117074B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/01—Mounting; Supporting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
    • F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
    • H01C1/028—Housing; Enclosing; Embedding; Filling the housing or enclosure the resistive element being embedded in insulation with outer enclosing sheath
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/08—Cooling, heating or ventilating arrangements
    • H01C1/084—Cooling, heating or ventilating arrangements using self-cooling, e.g. fins, heat sinks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C13/00—Resistors not provided for elsewhere
    • H01C13/02—Structural combinations of resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

The invention relates to the technical field of high-voltage switch equipment, in particular to a closing resistor and a closing resistor assembling structure using the same, wherein the closing resistor comprises: the first connecting seat is positioned at one end of the closing resistor; the second connecting seat is positioned at the other end of the closing resistor; one end of the insulating rod is connected with the first connecting seat, and the other end of the insulating rod is connected with the second connecting seat; the resistor discs are connected in series, are arranged on the insulating rod in series and are clamped between the first connecting seat and the second connecting seat; the opposite sides of the first connecting seat and the second connecting seat are respectively provided with an embedded groove; closing resistor still includes: and the insulating sheath is sleeved outside the resistor disc, and two ends of the insulating sheath are respectively positioned in the caulking grooves on the first connecting seat and the second connecting seat. Has the advantages that: when the resistance card cracks due to vibration, the insulation sheath protects the resistance card outside the resistance card, so that the resistance card can be prevented from falling, and the safety of other equipment and operators is ensured.

Description

Closing resistor and closing resistor assembling structure using same
Technical Field
The invention relates to the technical field of high-voltage switch equipment, in particular to a closing resistor and a closing resistor assembling structure using the same.
Background
At present, in a circuit breaker product with a voltage level of 550kV or above, in order to inhibit the influence of switching-on operation overvoltage, switching-on resistors are connected in parallel at two ends of a main fracture of the circuit breaker, so that partial electric energy in a power grid is converted into heat energy by using the switching-on resistors, and the purpose of weakening the operation overvoltage is achieved.
For example, a resistor (i.e., a closing resistor) disclosed in chinese patent application with application publication No. CN102723154A includes an insulating rod, a group of serially connected resistor discs connected in series on the insulating rod, and connecting seats disposed at both ends of the insulating rod, a conductive damping disc sleeved on the insulating rod is disposed between adjacent resistor discs, and a compression spring for compressing the resistor disc is disposed between one connecting seat and its adjacent resistor disc. Through setting up electrically conductive shock attenuation piece and pressure spring, guarantee the good electrical contact of each component of resistance, play the cushioning effect simultaneously in vibration environment for the resistance piece is not fragile.
However, in long-term practical operation and mechanical life tests, the resistor still cracks due to impact and vibration generated when the circuit breaker is opened and closed, and the resistor falls off once cracking, so that not only is the safety of other equipment and operators affected, but also the residual resistors cannot be tightly pressed, and the service performance of the closing resistor is affected.
Disclosure of Invention
The invention aims to provide a closing resistor which can prevent a resistor disc from falling after cracking; the invention also aims to provide a closing resistor assembling structure capable of preventing a resistor disc of the closing resistor from dropping after cracking.
In order to achieve the purpose, the closing resistor adopts the following technical scheme:
a closing resistor, comprising:
the first connecting seat is positioned at one end of the closing resistor;
the second connecting seat is positioned at the other end of the closing resistor;
one end of the insulating rod is connected with the first connecting seat, and the other end of the insulating rod is connected with the second connecting seat;
the resistor discs are connected in series, are arranged on the insulating rod in series and are clamped between the first connecting seat and the second connecting seat;
the opposite sides of the first connecting seat and the second connecting seat are respectively provided with an embedded groove;
closing resistor still includes:
and the insulating sheath is sleeved outside the resistor disc, and two ends of the insulating sheath are respectively positioned in the caulking grooves on the first connecting seat and the second connecting seat.
The beneficial effects of the above technical scheme are that: because closing resistor still includes insulating sheath, and insulating sheath cover is established in the outside of resistance card to be provided with the caulking groove respectively on first connecting seat and the relative one side of second connecting seat, insulating sheath's both ends are located the caulking groove respectively, when the resistance card is because when the vibration fracture, protect at its outside by insulating sheath like this, can prevent that the resistance card from dropping, guarantee other equipment and operating personnel's safety.
Furthermore, in order to improve the compression effect of the resistance card, the damping effect is buffered, abrasion between the resistance card and the insulating sheath in the vibration process is avoided, the damage to the outer surface of the resistance card is avoided, an elastic piece is arranged between the first connecting seat or the second connecting seat and the adjacent resistance card, so that the first connecting seat and the second connecting seat elastically compress the resistance cards, inner holes matched with the outer circumferential surface of the end part of the insulating sheath are respectively arranged in the caulking grooves of the first connecting seat and the second connecting seat, two ends of the insulating sheath are inserted in the inner holes, and the inner diameter of the insulating sheath is larger than the outer diameter of the resistance card, so that a gap is reserved between the inner wall of the insulating sheath and the resistance card.
Furthermore, in order to facilitate the configuration and installation of the elastic member, the elastic member is a spring, and the first connecting seat or the second connecting seat is further provided with an installation groove for installing the spring.
Furthermore, in order to avoid the extrusion deformation of the insulating sheath, a gap is formed between the end surface of the insulating sheath and the first connecting seat or the second connecting seat, so that the extrusion deformation of the insulating sheath is avoided.
Furthermore, in order to facilitate heat dissipation of the resistor disc, the insulating sheath is provided with heat dissipation holes facilitating heat dissipation of the resistor disc.
Further, in order to avoid the foreign matters in the insulating sheath from falling out through the heat dissipation holes, the closing resistor is transversely arranged during use, and the heat dissipation holes are arranged upwards.
Further, for the installation of convenient insulator spindle and improve the radiating effect, the insulator spindle is hollow rod, be provided with respectively on first connecting seat and the second connecting seat with the through-hole of caulking groove intercommunication separately, the both ends of insulator spindle are located the through-hole respectively.
In order to achieve the purpose, the assembly structure of the closing resistor adopts the following technical scheme:
the utility model provides a closing resistor assembly structure, includes and moves support and fixed the setting and move the support outlying closing resistor, closing resistor includes:
the first connecting seat is positioned at one end of the closing resistor;
the second connecting seat is positioned at the other end of the closing resistor;
one end of the insulating rod is connected with the first connecting seat, and the other end of the insulating rod is connected with the second connecting seat;
the resistor discs are connected in series, are arranged on the insulating rod in series and are clamped between the first connecting seat and the second connecting seat;
the opposite sides of the first connecting seat and the second connecting seat are respectively provided with an embedded groove;
closing resistor still includes:
and the insulating sheath is sleeved outside the resistor disc, and two ends of the insulating sheath are respectively positioned in the caulking grooves on the first connecting seat and the second connecting seat.
The beneficial effects of the above technical scheme are that: because closing resistor still includes insulating sheath, and insulating sheath cover is established in the outside of resistance card to be provided with the caulking groove respectively on first connecting seat and the relative one side of second connecting seat, insulating sheath's both ends are located the caulking groove respectively, when the resistance card is because when the vibration fracture, protect at its outside by insulating sheath like this, can prevent that the resistance card from dropping, guarantee other equipment and operating personnel's safety.
Furthermore, in order to improve the compression effect of the resistance card, the damping effect is buffered, abrasion between the resistance card and the insulating sheath in the vibration process is avoided, the damage to the outer surface of the resistance card is avoided, an elastic piece is arranged between the first connecting seat or the second connecting seat and the adjacent resistance card, so that the first connecting seat and the second connecting seat elastically compress the resistance cards, inner holes matched with the outer circumferential surface of the end part of the insulating sheath are respectively arranged in the caulking grooves of the first connecting seat and the second connecting seat, two ends of the insulating sheath are inserted in the inner holes, and the inner diameter of the insulating sheath is larger than the outer diameter of the resistance card, so that a gap is reserved between the inner wall of the insulating sheath and the resistance card.
Furthermore, in order to facilitate the configuration and installation of the elastic member, the elastic member is a spring, and the first connecting seat or the second connecting seat is further provided with an installation groove for installing the spring.
Furthermore, in order to avoid the extrusion deformation of the insulating sheath, a gap is formed between the end surface of the insulating sheath and the first connecting seat or the second connecting seat, so that the extrusion deformation of the insulating sheath is avoided.
Furthermore, in order to facilitate heat dissipation of the resistor disc, the insulating sheath is provided with heat dissipation holes facilitating heat dissipation of the resistor disc.
Further, in order to avoid the foreign matters in the insulating sheath from falling out through the heat dissipation holes, the closing resistor is transversely arranged during use, and the heat dissipation holes are arranged upwards.
Further, for the installation of convenient insulator spindle and improve the radiating effect, the insulator spindle is hollow rod, be provided with respectively on first connecting seat and the second connecting seat with the through-hole of caulking groove intercommunication separately, the both ends of insulator spindle are located the through-hole respectively.
Drawings
FIG. 1 is a perspective view of a closing resistor assembly structure according to the present invention;
FIG. 2 is a perspective view of the closing resistor assembly structure of the present invention with the movable support removed;
fig. 3 is a side view of a closing resistor assembly structure in a breaker barrel according to the present invention;
FIG. 4 is a partial cross-sectional view of the conductive pillar portion of FIGS. 1 and 2;
fig. 5 is a cross-sectional view of a third closing resistor of fig. 1 and 2;
fig. 6 is a structural view of the insulating sheath of fig. 5.
In the figure: 1-moving a support; 2-a third insulating pillar; 3-a second connecting plate; 4-a second closing resistor; 5-a first connection plate; 6-a first closing resistor; 7-a third connecting plate; 8-a fourth insulating pillar; 9-a fourth closing resistor; 91-a connecting seat; 10-a conductive pillar; 11-a first insulating pillar; 12-a resistive moving contact; 13-a contact stem; 14-a guide support; 15-third closing resistance; 151-first connection mount; 1511-first caulking groove; 1512-a first bore; 1513-first via; 152-a second connection seat; 1521-second caulking groove; 1522-second inner bore; 1523 second via; 1524-spring mounting groove; 153-an insulating rod; 154-an insulating sheath; 1541-heat dissipation holes; 155-resistor disc; 156-a shim; 157-a spring; 158-pin shaft; 16-a second insulating pillar; 17-adjusting the shim; and 18-barrel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
One embodiment of the closing resistor assembly structure of the present invention is shown in fig. 1 and 2, and includes a movable support 1, a resistor moving contact assembly, and a plurality of series closing resistors. The movable support 1 is used for supporting a main fracture moving contact (not shown in the figure) and is electrically connected with the main fracture moving contact, the movable support 1 is of a cylindrical structure, and the axial direction of the movable support 1 is defined as the left-right direction.
The first closing resistor is provided with four closing resistors, the four closing resistors are uniformly distributed along the circumferential direction of the movable support 1 and transversely arranged on the periphery of the movable support, the four closing resistors are respectively a first closing resistor 6, a second closing resistor 4, a third closing resistor 15 and a fourth closing resistor 9, and the four closing resistors extend along the left-right direction. The second closing resistor 4 and the third closing resistor 15 have the same structure and are symmetrically arranged, each series of closing resistors includes connecting seats at two ends, and the difference between the four series of closing resistors is only that the structures of the connecting seats at the two ends are slightly different, and the difference is mainly for facilitating the connection of the closing resistors and other parts.
Taking the third switching-on resistor 15 as an example, as shown in fig. 5, the third switching-on resistor 15 includes a first connecting seat 151 at the left end and a second connecting seat 152 at the right end, and the two connecting seats are connected together through an insulating rod 153. Specifically, a first through hole 1513 is formed in the first connecting seat 151, a second through hole 1523 is formed in the second connecting seat 152, the left end and the right end of the insulating rod 153 are inserted into the first through hole 1513 and the second through hole 1523 respectively, then the left end of the first connecting seat 151 and the left end of the insulating rod 153 are penetrated by the pin 158, the right end of the second connecting seat 152 and the right end of the insulating rod 153 are penetrated by the other pin 158, and the two pin shafts are limited in the corresponding connecting seats through elastic check rings (not shown in the figure).
The insulating rod 153 is provided with a plurality of resistor discs 155 connected in series, and the plurality of resistor discs 155 are clamped between the first connecting seat 151 and the second connecting seat 152. A first caulking groove 1511 is formed in one side of the first connection seat 151 facing the second connection seat 152, the first through hole 1513 is communicated with the first caulking groove 1511, and the resistor sheet 155 at the left end is located in the first caulking groove 1511 and contacts with the bottom of the first caulking groove 1511.
A second inserting groove 1521 is formed in one side of the second connecting seat 152 facing the first connecting seat 151, and the second through hole 1523 is communicated with the second inserting groove 1521. An elastic member is arranged between the second connecting seat 152 and the adjacent resistance sheet, the elastic member is a spring 157, and in order to facilitate the installation of the spring 157, a spring installation groove 1524 is arranged in the second embedding groove 1521. The spring 157 sets up and can make first connecting seat 151 and second connecting seat 152 elasticity compress tightly a plurality of resistance cards, improves the effect that compresses tightly the resistance card, plays the absorbing effect of buffering. In addition, in order to eliminate errors and facilitate assembly, a spacer 156 is arranged between the spring 157 and the adjacent resistor disc.
The third switching-on resistor 15 further includes an insulating sheath 154 sleeved outside the resistor disc, a first inner hole 1512 fitted with an outer circumferential surface of a left end portion of the insulating sheath 154 is arranged in the first caulking groove 1511, a second inner hole 1524 fitted with an outer circumferential surface of a right end portion of the insulating sheath 154 is arranged in the second caulking groove 1521, a left end of the insulating sheath 154 is inserted into the first inner hole 1512, and a right end of the insulating sheath 154 is inserted into the second inner hole 1524. And the inner diameter of the insulating sheath 154 is larger than the outer diameter of the resistor 155, that is, the aperture of the first inner hole 1512 or the second inner hole 1524 is larger than the outer diameter of the resistor 155 plus twice the wall thickness of the insulating sheath 154, so that a gap is generated between the inner wall of the insulating sheath 154 and the resistor 155, the gap prevents the insulating sheath 154 from contacting the resistor 155, and further prevents the resistor and the insulating sheath from being worn during vibration, and prevents the outer surface of the resistor from being damaged.
The insulating sheath 154 mainly protects the resistor chip 155 from falling when the resistor chip 155 cracks due to vibration, and therefore safety of other equipment and operators is guaranteed. The gap between the insulating sheath 154 and the resistor chip 155 cannot be too large or too small, which may cause wear of the resistor chip as described above, and too large may cause the cracked resistor chip to separate from the resistor string, which may result in the remaining resistor chips not being tightly pressed, and may affect the performance of the closing resistor. Therefore, the insulating sheath 154 and the resistor discs 155 have a suitable gap therebetween, which both prevents contact therebetween and allows the cracked resistor discs to remain clamped in the resistor string, thereby ensuring the integrity of the entire resistor string.
The insulating sheath 154 is made of polytetrafluoroethylene, has good insulating property and high temperature resistance, and can meet the use requirement of a closing working condition. In order to prevent the insulating sheath 154 from being deformed by the extrusion, a gap is formed between the left end of the insulating sheath 154 and the first connecting seat 151, or between the right end of the insulating sheath 154 and the second connecting seat 152, that is, the insulating sheath 154 is not tightly pressed by the connecting seats at both ends, but has a certain axial movement margin.
In addition, in order to facilitate heat dissipation of the resistor disc, as shown in fig. 6, a plurality of heat dissipation holes 1541 are formed in the insulating sheath 154, and the heat dissipation holes 1541 are disposed upward, so that foreign matters in the insulating sheath can be prevented from falling out through the heat dissipation holes. In addition, the insulating rod 153 is a hollow rod, and the hollow insulating rod 153 is communicated with the first through hole 1513 and the second through hole 1523, which is also beneficial to heat dissipation.
The resistance moving contact assembly comprises a contact rod 13, a resistance moving contact 12 fixed at the left end part of the contact rod 13 and a guide support 14 fixed on the moving support 1, wherein the contact rod 13 is installed on the guide support 14 in a guide moving mode along the left-right direction and is electrically connected with the guide support 14, namely the resistance moving contact 12 is electrically connected with the guide support 14 through the contact rod 13. The guide support 14 is fixed on the movable support 1 through an insulating member, specifically a first insulating pillar 11, and the whole resistance movable contact assembly is located right below the movable support 1.
The first closing resistor 6 and the fourth closing resistor 9 are positioned at the lower side of the movable support 1, and the second closing resistor 4 and the third closing resistor 15 are positioned at the upper side of the movable support. The four series of closing resistors are connected in series end to end through a conductive connecting piece, and the first closing resistor 6 is arranged at the rear side of the resistor moving contact assembly to form a closing resistor at the head end of the four series of closing resistors; the fourth closing resistor 9 is arranged at the front side of the resistor moving contact assembly to form a closing resistor at the tail end of the four series of closing resistors.
The conductive connecting parts are three connecting plates, namely a first connecting plate 5 connected with the right end of the first closing resistor 6 and the right end of the second closing resistor 4, a second connecting plate 3 connected with the left end of the second closing resistor 4 and the left end of the third closing resistor 15, and a third connecting plate 7 connected with the right end of the third closing resistor 15 and the right end of the fourth closing resistor 9. The first connecting plate 5 is vertically arranged at the rear side of the movable support 1, the second connecting plate 3 is transversely arranged at the upper side of the movable support 1, and the third connecting plate 7 is vertically arranged at the front side of the movable support 1.
Each connecting plate is fixed on the movable support 1 through an insulating support, so that the number of the insulating supports is three, namely a second insulating support 16 fixedly connected between the movable support 1 and the first connecting plate 5, a third insulating support 2 fixedly connected between the movable support 1 and the second connecting plate 3, and a fourth insulating support 8 fixedly connected between the movable support 1 and the third connecting plate 7.
The left end of the first closing resistor 6 is fixed and electrically connected with the guide support 14, the left end of the fourth closing resistor 9 is fixed and electrically connected with the movable support 1 through the conductive support 10, and the guide support 14 is electrically connected with the resistor moving contact 12 through the contact rod 13, and the movable support 1 is electrically connected with the main fracture moving contact, so that the main fracture moving contact and the resistor moving contact 12 are electrically connected through four series of closing resistors.
The guide support 14 and the first insulation pillar 11 realize the fixation of the left end of the first closing resistor 6, and the conductive pillar 10 realizes the fixation of the left end of the fourth closing resistor 9, so that the guide support 14, the first insulation pillar 11, the conductive pillar 10, the connecting plate and the three insulation pillars between the movable support and the connecting plate jointly ensure that the four series of closing resistors are stably fixed on the movable support.
Between each closing resistor and the connecting plate, between connecting plate and the insulating pillar, between insulating pillar and the movable support, between first closing resistor 6 and direction support 14, between fourth closing resistor 9 and electrically conductive pillar 10, electrically conductive pillar 10 and movable support all adopt the bolt fastening, for convenient holistic assembly, be provided with adjusting shim 17 between electrically conductive pillar 10 and fourth closing resistor 9's connecting seat 91, as shown in fig. 4, adjusting shim 17 can compensate machining error and accumulative assembly error, guarantee that the resistance assembly atress is even when the bolt-up.
The assembly structure of the closing resistor adopts the four series of closing resistors which are connected in series, and the four series of closing resistors are uniformly arranged in the circumferential direction of the movable support, so that the overall length of the arc extinguish chamber can be effectively shortened, under the condition of the same resistor parameter, namely under the condition of certain heat capacity, the four series of closing resistors are more compact than the two series of closing resistors, the space utilization rate is higher, the length of each series of closing resistors can be shortened, the closing resistors can be fixed without needing a long movable support, and the arrangement of the closing resistors is easier. The maximum position of the outer contour of the four series of closing resistors is positioned on the same circumference, and compared with two series or single series of resistors, the arc extinguish chamber is more uniform in the whole ground electric field.
Meanwhile, as shown in fig. 3, when the closing resistor assembling structure is arranged in the cylinder 18 of the circuit breaker, under the condition that the inner diameter R1 of the cylinder is constant, the radial dimension R2 of the resistor assembly is reduced by the closing resistor arranging form, so that the insulation distance L of the arc extinguish chamber to the cylinder shell is increased, and the insulation margin of the product in operation is improved. In addition, the arrangement form of the four strings of short resistors is obviously superior to the arrangement form of the two strings of long resistors in the aspect of resisting the mechanical operation disturbance of the circuit breaker.
In other embodiments of the closing resistor assembling structure, the insulating rod may also be a solid rod, and in this case, the insertion holes for inserting the ends of the insulating rod in the first connecting seat and the second connecting seat do not need to be formed as through holes.
In other embodiments of the closing resistor assembling structure, the bolt may also be used to penetrate through the insulating rod and be connected with the connecting seat through the screw thread, so as to fix the insulating rod and the connecting seat, or the insulating rod penetrates out of the connecting seat, and the nut is connected with the insulating rod through the screw thread, so as to fix the insulating rod and the connecting seat.
In other embodiments of the closing resistor assembling structure, the heat dissipation hole on the insulating sheath may also be disposed forward or backward.
In other embodiments of the closing resistor assembling structure, the insulating sheath may not be provided with the heat dissipation hole.
In other embodiments of the closing resistor assembling structure, when the strength of the insulating sheath is sufficient and the insulating sheath is not easily deformed by squeezing, both ends of the insulating sheath can be squeezed by the first connecting seat and the second connecting seat.
In other embodiments of the closing resistor assembly structure, the second connecting seat may also be provided with a convex pillar instead of a spring mounting groove, and the spring is sleeved outside the convex pillar, or the second connecting seat is provided with neither a spring mounting groove nor a convex pillar, and is only provided with a flat groove bottom, and the end of the spring directly presses against the groove bottom.
In other embodiments of the closing resistor assembly structure, the spring may also be disposed between the first connecting seat and the adjacent resistor disc.
In other embodiments of the closing resistor assembly structure, the elastic member may not be a spring, but an elastic rubber pad.
In other embodiments of the closing resistor assembly structure, there may be no gap between the inner wall of the insulating sheath and the resistor disc, but there is contact.
In other embodiments of the closing resistor assembling structure, the elastic member may not be provided, and the first connecting seat and the second connecting seat rigidly squeeze the resistor disc.
The embodiment of the closing resistor in the invention is as follows: the specific structure of the closing resistor is the same as that of the closing resistor in the above-mentioned embodiment of the assembling structure of the closing resistor, and will not be repeated here.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.

Claims (8)

1. A closing resistor, comprising:
the first connecting seat is positioned at one end of the closing resistor;
the second connecting seat is positioned at the other end of the closing resistor;
one end of the insulating rod is connected with the first connecting seat, and the other end of the insulating rod is connected with the second connecting seat;
the resistor discs are connected in series, are arranged on the insulating rod in series and are clamped between the first connecting seat and the second connecting seat;
the method is characterized in that:
the opposite sides of the first connecting seat and the second connecting seat are respectively provided with an embedded groove;
closing resistor still includes:
and the insulating sheath is sleeved outside the resistor disc, and two ends of the insulating sheath are respectively positioned in the caulking grooves on the first connecting seat and the second connecting seat.
2. The closing resistor of claim 1, wherein: an elastic piece is arranged between the first connecting seat or the second connecting seat and the adjacent resistor disc so that the first connecting seat and the second connecting seat can elastically compress the resistor discs, inner holes matched with the outer circumferential surface of the end part of the insulating sheath are respectively arranged in the caulking grooves of the first connecting seat and the second connecting seat, two ends of the insulating sheath are inserted in the inner holes, and the inner diameter of the insulating sheath is larger than the outer diameter of the resistor disc so that a gap is formed between the inner wall of the insulating sheath and the resistor disc.
3. The closing resistor of claim 2, wherein: the elastic piece is a spring, and a mounting groove for mounting the spring is further formed in the first connecting seat or the second connecting seat.
4. The closing resistor according to any of claims 1 to 3, wherein: a gap is formed between the end face of the insulating sheath and the first connecting seat or the second connecting seat, so that the insulating sheath is prevented from being extruded and deformed.
5. The closing resistor according to any of claims 1 to 3, wherein: the insulating sheath is provided with heat dissipation holes convenient for heat dissipation of the resistor disc.
6. The closing resistor of claim 5, wherein: when the device is used, the closing resistor is transversely arranged, and the radiating holes are arranged upwards.
7. The closing resistor according to any of claims 1 to 3, wherein: the insulating rod is hollow rod, be provided with respectively on first connecting seat and the second connecting seat with the through-hole of caulking groove intercommunication separately, the both ends of insulating rod are located the through-hole respectively.
8. The utility model provides a closing resistor assembly structure, is moving support and fixed setting and moving the peripheral closing resistor of support, its characterized in that including moving support and fixed: the closing resistor is the same as the closing resistor of any one of claims 1 to 7.
CN202010671142.6A 2020-07-13 2020-07-13 Closing resistor and closing resistor assembly structure using same Active CN112117074B (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB335471A (en) * 1928-12-28 1930-09-25 British Thomson Houston Co Ltd Improvements in and relating to resistors
EP0044802A1 (en) * 1980-07-17 1982-01-27 Siemens Aktiengesellschaft Resistor device comprising stacked annular resistor elements with the same axis
WO1993002461A1 (en) * 1991-07-23 1993-02-04 Abb Power T & D Company, Inc. Modular closing resistor
CN1165385A (en) * 1995-12-16 1997-11-19 亚瑞亚·勃朗勃威力有限公司 Power circuit-breaker having closing resistor
CN2906887Y (en) * 2006-04-26 2007-05-30 王光顺 Multi-stage arc extinguishing breaking device for extra high voltage breaker
JP2013143417A (en) * 2012-01-10 2013-07-22 Koa Corp Resistor
CN107221472A (en) * 2017-05-05 2017-09-29 平高集团有限公司 Resistor disc crimping structure and breaker
CN208970249U (en) * 2018-11-29 2019-06-11 南阳中威电气有限公司 A kind of New-core group damping arrester
CN210142550U (en) * 2019-07-24 2020-03-13 新东北电气集团高压开关有限公司 Closing resistor structure with protection resistance card
CN210640152U (en) * 2019-10-31 2020-05-29 上海思源高压开关有限公司 Connection structure of closing resistor for circuit breaker

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB335471A (en) * 1928-12-28 1930-09-25 British Thomson Houston Co Ltd Improvements in and relating to resistors
EP0044802A1 (en) * 1980-07-17 1982-01-27 Siemens Aktiengesellschaft Resistor device comprising stacked annular resistor elements with the same axis
WO1993002461A1 (en) * 1991-07-23 1993-02-04 Abb Power T & D Company, Inc. Modular closing resistor
CN1165385A (en) * 1995-12-16 1997-11-19 亚瑞亚·勃朗勃威力有限公司 Power circuit-breaker having closing resistor
CN2906887Y (en) * 2006-04-26 2007-05-30 王光顺 Multi-stage arc extinguishing breaking device for extra high voltage breaker
JP2013143417A (en) * 2012-01-10 2013-07-22 Koa Corp Resistor
CN107221472A (en) * 2017-05-05 2017-09-29 平高集团有限公司 Resistor disc crimping structure and breaker
CN208970249U (en) * 2018-11-29 2019-06-11 南阳中威电气有限公司 A kind of New-core group damping arrester
CN210142550U (en) * 2019-07-24 2020-03-13 新东北电气集团高压开关有限公司 Closing resistor structure with protection resistance card
CN210640152U (en) * 2019-10-31 2020-05-29 上海思源高压开关有限公司 Connection structure of closing resistor for circuit breaker

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