CN112216552A - Vacuum circuit breaker - Google Patents
Vacuum circuit breaker Download PDFInfo
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- CN112216552A CN112216552A CN202010837051.5A CN202010837051A CN112216552A CN 112216552 A CN112216552 A CN 112216552A CN 202010837051 A CN202010837051 A CN 202010837051A CN 112216552 A CN112216552 A CN 112216552A
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- conductive
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- 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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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- 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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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- Circuit Breakers (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The present invention relates to a vacuum circuit breaker, comprising: the outer sleeve is internally provided with an arc extinguish chamber, the arc extinguish chamber comprises a movable conducting rod, and the movable conducting rod is in transmission connection with an insulating pull rod; the upper part of the fixed supporting structure penetrates into the outer sleeve to support the arc extinguish chamber; the fixed supporting structure comprises a movable end conductive block, a conductive supporting cylinder and a movable end conductive flange which are sequentially in conductive connection from top to bottom, the movable end conductive block is in conductive connection with the movable conductive rod, and a lower outlet terminal is arranged on the movable end conductive flange; and the movable end heat pipes comprise an upper evaporation section and a lower condensation section, the plurality of movable end heat pipes are arranged around the insulating pull rod, the upper evaporation section of each movable end heat pipe is in heat conduction contact with the movable end conductive block, and the lower condensation section of each movable end heat pipe is in heat conduction contact with the conductive support cylinder and/or the movable end conductive flange. Because the movable end heat pipes are arranged around the insulating pull rod, the setting space is large, the number of the movable end heat pipes can be increased according to actual heat dissipation requirements on the basis that the radial size of the movable conducting rod is not additionally increased, and the heat dissipation performance of the circuit breaker is conveniently improved.
Description
Technical Field
The present invention relates to a vacuum circuit breaker.
Background
With the development demand of high-voltage power systems and the increasing emphasis on environmental issues, vacuum circuit breakers are continuously developing in the direction of high voltage and large current. The 126kV vacuum circuit breaker has been developed successfully, but the current capacity is poor, the temperature rise test is only completed below 2000A, and the temperature rise test exceeding 2000A is difficult to pass. The reason is that the on-off current of the vacuum arc-extinguishing chamber needs a larger longitudinal magnetic field for arc quenching, the larger longitudinal magnetic field needs a more complex contact structure for realizing, the complex contact structure increases the loop resistance to restrict the current capacity, and is influenced by the voltage grade and the operating mechanism, the conductive loop in the 126kV vacuum arc-extinguishing chamber is longer and the quality of the movable end needs to be strictly controlled, so that the heat dissipation of the vacuum arc-extinguishing chamber is seriously influenced, and the temperature of the movable end and the fixed end of the vacuum arc-extinguishing chamber is overhigh.
The invention discloses a high-voltage vacuum circuit breaker in the Chinese patent application publication with the application publication number of CN1963972A, wherein a vacuum arc-extinguishing chamber is arranged in a ceramic sleeve, a static conducting rod and a dynamic conducting rod are arranged at two ends of the vacuum arc-extinguishing chamber, an upper conducting ring and an upper flange are arranged around the static conducting rod, an upper connecting lower terminal is arranged outside the ceramic sleeve to be in conductive connection with the upper conducting rod, and a first radiator is arranged above the upper flange; the lower conducting ring and the conducting support are arranged around the movable conducting rod, the lower flange is arranged below the conducting support, the lower conducting ring is connected with a lower wiring terminal outside the ceramic sleeve, the second radiator is arranged around the lower flange, insulating oil for heat dissipation is arranged in gaps between the ceramic sleeve and the vacuum arc-extinguishing chamber and between the ceramic sleeve and the conducting support, holes are formed in the static conducting rod for improving the heat dissipation performance, the inner part of each hole is provided with a heat pipe, liquid working media are arranged in the heat pipes, heat in the static conducting rod is effectively guided to the first radiator by the heat pipes, and the performance of the radiator of the vacuum circuit breaker is improved. However, for the vacuum arc-extinguishing chamber, the heat pipe is arranged corresponding to the static end, so that the static end can effectively dissipate heat, the movable end still depends on the insulating oil and the conductive support to conduct and dissipate heat, and the heat dissipation performance is poor.
To this problem, prior art also has the movable end heat pipe radiator structure among the high-pressure vacuum circuit breaker who discloses in the chinese utility model patent that adopts the grant bulletin number CN204289233U, among the vacuum circuit breaker, the movable end of explosion chamber is connected with the conducting rod, and the inside heat pipe that sets up of conducting rod, the periphery of conducting rod is close to lower extreme position department and sets up down the outlet plate, and the heat of explosion chamber movable end passes through the heat pipe and transmits lower outlet plate, finally dispels the heat in the air through lower outlet plate. This kind of structure that sets up the heat pipe inside the conducting rod can increase the heat dispersion that the explosion chamber moved the end, however, because the conducting rod radial dimension is limited, the heat pipe quantity and the size of inside setting are limited, lead to heat dispersion to increase limitedly, can not effectively improve high-pressure vacuum circuit breaker and move end heat dispersion.
Disclosure of Invention
The invention aims to provide a vacuum circuit breaker, which aims to solve the technical problem that the heat dissipation performance is increased to a limited extent in the manner of arranging a heat pipe in a movable conducting rod of a vacuum arc-extinguishing chamber in the prior art.
In order to achieve the purpose, the technical scheme of the vacuum circuit breaker provided by the invention is as follows: a vacuum interrupter, comprising:
the inner part of the outer sleeve is provided with an arc extinguish chamber, the arc extinguish chamber comprises a downward extending movable conducting rod, and the lower end of the movable conducting rod is connected with an insulating pull rod in a transmission way;
the fixed supporting structure is fixedly assembled with the bottom end of the outer sleeve, and the upper part of the fixed supporting structure penetrates into the outer sleeve to support the arc extinguish chamber;
the fixed supporting structure comprises a movable end conductive block, a conductive supporting cylinder and a movable end conductive flange which are sequentially in conductive connection from top to bottom, the movable end conductive block is in conductive connection with the movable conductive rod, and a lower outlet terminal is arranged on the movable end conductive flange;
and the movable end heat pipes comprise an upper evaporation section and a lower condensation section, the plurality of movable end heat pipes are arranged around the insulating pull rod, the upper evaporation section of each movable end heat pipe is in heat conduction contact with the movable end conductive block, and the lower condensation section of each movable end heat pipe is in heat conduction contact with the conductive support cylinder and/or the movable end conductive flange.
The beneficial effects are that: according to the vacuum circuit breaker provided by the invention, the efficiency of transferring heat of the movable end of the arc extinguish chamber to the conductive flange of the movable end can be improved through the movable end heat pipe, so that the heat dissipation speed of the movable end of the vacuum arc extinguish chamber can be effectively improved, and the heat dissipation performance of the circuit breaker can be effectively improved. Moreover, because the movable end heat pipes are arranged around the insulating pull rod, the setting space is large, the number of the movable end heat pipes can be increased according to actual heat dissipation requirements on the basis that the radial sizes of the movable conducting rods, the conductive supporting cylinders and the outer sleeve are not additionally increased, and the heat dissipation performance of the circuit breaker is conveniently improved.
As a further improvement, the movable end conductive block comprises an upper conductive block and a lower conductive block which are fixedly assembled together from top to bottom, the two conductive blocks are provided with through conductive rod through holes, and conductive contact fingers are arranged in the conductive rod through holes of the upper conductive block and/or the lower conductive block so as to be in conductive connection with the movable conductive rod; the upper evaporation section is bent inwards to form an upper bending section, and the upper bending section is arranged between the two conductive blocks so as to be clamped and fixed by the two conductive blocks.
The beneficial effects are that: the upper evaporation section of the movable end heat pipe is clamped by the two conductive blocks, so that the movable end heat pipe is conveniently fixed on the movable end conductive block, and the installation is convenient.
As a further improvement, the lower side surface of the upper conductive block and/or the lower side surface of the lower conductive block are provided with accommodating grooves extending along the radial direction of the conductive blocks, and the accommodating grooves are used for accommodating the upper bent sections.
The beneficial effects are that: set up the holding tank on the downside of last conducting block and/or the downside of conducting block down, conveniently install the location to moving end heat pipe, improve assembly efficiency.
As a further improvement, the outer peripheral surface of the lower conductive block is provided with a plurality of heat pipe positioning grooves which are communicated along the vertical direction and are distributed at intervals along the circumferential direction of the lower conductive block in sequence, and the heat pipes at the moving ends are positioned in the heat pipe positioning grooves in a one-to-one correspondence manner.
The beneficial effects are that: the heat pipe positioning groove is used for positioning the movable end heat pipe, so that the assembly efficiency can be improved.
As a further improvement, move end conducting block with the cooperation of electrically conductive support section of thick bamboo shore, move one of them of end conducting block and electrically conductive support section of thick bamboo and go up along its circumference interval equipartition and have a plurality of uide pins, go up along its circumference interval equipartition on another and have a plurality of guiding holes, uide pin and guiding hole all extend along upper and lower direction, both correspond the direction and peg graft to guide and move end conducting block and electrically conductive support section of thick bamboo shore cooperation.
The beneficial effects are that: the guide matching of the guide pin and the guide hole is utilized, and the guide top support matching of the movable end conductive block and the conductive support cylinder is conveniently realized.
As a further improvement, the guide pin is fixedly arranged on the movable end conductive block, a boss which protrudes downwards is arranged on the lower side of the movable end conductive block, and the guide pin is arranged around the outer side of the boss.
As a further improvement, the lower condensation section of the moving end heat pipe is bent inwards to form a lower bending section, and the lower bending section is propped against the moving end conductive flange to realize the heat conduction contact between the lower condensation section and the moving end conductive flange.
The beneficial effects are that: the lower bending section of the movable end heat pipe props against the movable end conductive flange, so that effective heat conduction contact with the movable end conductive flange is conveniently realized.
As a further improvement, the movable end conductive flange and the conductive support cylinder are integrally formed, a lower through hole for the insulation pull rod to penetrate through is reserved in the center of the movable end conductive flange, the lower through hole is hermetically assembled with the insulation pull rod, and the lower bending section supports against the area, located between the lower through hole and the conductive support cylinder, of the movable end conductive flange.
The beneficial effects are that: the movable end conductive flange and the conductive support cylinder are integrally formed, so that the processing and the manufacturing are convenient, and the assembly is also convenient.
As a further improvement, insulating fluid is arranged in the outer sleeve, and a plurality of through holes are formed in the wall of the conductive support cylinder and penetrate through the inside and the outside of the conductive support cylinder.
The beneficial effects are that: the wall of the conductive support cylinder is provided with a through hole, so that the insulating fluid can flow conveniently to conduct heat.
As a further improvement, an arc extinguish chamber supporting block is supported and arranged between the movable end conducting block and the arc extinguish chamber, the arc extinguish chamber supporting block is annular and is sleeved outside the movable conducting rod, a radial through hole is formed in the arc extinguish chamber supporting block and is communicated with the inside and the outside of the arc extinguish chamber supporting block, and a guide structure extending in the vertical direction is arranged between the arc extinguish chamber supporting block and the movable end conducting block so as to guide the movable end conducting block to be upwards supported and assembled with the arc extinguish chamber supporting block.
The beneficial effects are that: the arc extinguish chamber supporting block is supported between the movable end conductive block and the arc extinguish chamber, so that the size of the movable end conductive block can be saved, and the production cost is reduced under the condition of ensuring effective conductive contact.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a vacuum circuit breaker provided in the present invention;
fig. 2 is a partial cross-sectional view of the vacuum circuit breaker of fig. 1;
fig. 3 is a schematic structural view of the vacuum circuit breaker shown in fig. 1 after the outer bushing is removed;
FIG. 4 is a schematic structural view of FIG. 3 with the movable end conductive flange and the conductive support cylinder removed;
FIG. 5 is a schematic structural view of the movable end conductive flange and the conductive support cylinder integrally arranged in FIG. 3;
FIG. 6 is a schematic structural diagram of the movable end conductive block in FIG. 4;
FIG. 7 is a schematic structural diagram of the lower conductive block of FIG. 6;
FIG. 8 is a schematic structural diagram of the upper conductive block of FIG. 7;
fig. 9 is a schematic view of the structure of the lower conductive block and the moving-end heat pipe in fig. 4.
Description of reference numerals:
1-a moving end conductive flange, 2-an outer sleeve, 3-an arc extinguish chamber, 4-an upper conductive block, 5-a lower conductive block, 6-a moving end heat pipe, 7-an insulating pull rod, 8-a conductive support cylinder, 9-a moving conductive rod, 41-a guide pin, 42-a guide pin mounting hole, 43-an upper bolt mounting hole, 44-a guide through hole, 51-a heat pipe positioning groove, 52-a lower bolt mounting hole, 61-an upper bent section, 62-a middle straight pipe section, 63-a lower bent section, 81-a through hole, 82-a guide hole, 90-a lower connecting flange, 91-an upper connecting flange, 92-a stationary end conductive flange, 93-a radiating cap, 94-an upper outlet terminal, 95-a shed structure, 96-a lower outlet terminal, 97-a support cover plate, 98-arc chute supporting block.
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, elements recited by the phrase "comprising an … …" do not exclude the inclusion of such elements in processes or methods.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
The specific embodiment 1 of the vacuum circuit breaker provided by the present invention:
as shown in fig. 1 to 9, the vacuum circuit breaker in this embodiment includes an outer sleeve 2, an arc extinguish chamber 3 is disposed inside the outer sleeve 2, the arc extinguish chamber 3 is specifically intended to adopt a vacuum arc extinguish chamber, the outer sleeve 2 extends along a vertical direction, a static end conductive flange 92 is disposed on the top of the outer sleeve 2, the static end conductive flange 92 is electrically connected with the arc extinguish chamber static end on the top of the arc extinguish chamber, an upper wire outgoing terminal 94 is disposed on the static end conductive flange 92, a heat dissipation cap 93 is fixedly connected to the static end conductive flange 92, a heat dissipation rib is disposed on the periphery of the heat dissipation cap 93, in addition, for improving the heat dissipation effect, a static end heat pipe is correspondingly disposed, a lower evaporation section of the static end heat pipe is in heat conduction contact with the static end conductive flange 92, an upper condensation section is in contact with the heat dissipation cap 93. Correspondingly, the movable end of the arc extinguish chamber transfers heat to the movable end conductive flange 1 through the corresponding movable end heat pipe 6, heat dissipation is realized through the movable end conductive flange 1, heat dissipation performance of the movable end and the static end of the arc extinguish chamber is effectively improved, and working environment of the arc extinguish chamber is improved.
Specifically, the outer sleeve 2 is an insulating sleeve, and a shed structure 95 is provided outside the outer sleeve to improve the insulating performance of the insulating sleeve. An upper connecting flange 91 is arranged at the top end of the outer sleeve 2, a lower connecting flange 90 is arranged at the bottom end of the outer sleeve 2, the upper connecting flange 91 fixedly assembles a static end conductive flange 92 and the outer sleeve 2 together through a connecting bolt, and the lower connecting flange 90 fixedly assembles a movable end conductive flange 1 and the outer sleeve 2 together through a connecting bolt.
For the arc extinguish chamber 3, the arc extinguish chamber is located inside the outer sleeve 2, the top end of the arc extinguish chamber is a static end of the arc extinguish chamber and is fixedly connected with a static end conductive flange, the lower end of the arc extinguish chamber is a movable end of the arc extinguish chamber, the movable end of the arc extinguish chamber comprises a movable conductive rod 9 extending downwards, the movable conductive rod 9 extends in the up-down direction, the lower end of the movable conductive rod is in transmission connection with an insulating pull rod 7, the insulating pull rod 7 is used for being in transmission connection with an operating mechanism, and when the arc extinguish chamber is used, the operating mechanism drives the movable conductive rod to.
In this embodiment, the arc extinguish chamber 3 is supported by the fixed supporting structure to be positioned and installed inside the outer sleeve 1, the fixed supporting structure is fixedly assembled with the bottom end of the outer sleeve 2, and the upper portion of the fixed supporting structure penetrates into the inner portion of the outer sleeve 2 to support the arc extinguish chamber 3. Specifically, the fixed supporting structure comprises an arc extinguish chamber supporting block 98, a movable end conductive block, a conductive supporting cylinder 8 and a movable end conductive flange 1 which are sequentially arranged from top to bottom, wherein the conductive supporting cylinder 8 and the movable end conductive flange 1 are integrally arranged, the structure of the fixed supporting structure is as shown in fig. 5, the conductive supporting cylinder 8 and the movable end conductive block are in supporting and supporting cooperation, and the arc extinguish chamber supporting block 98 is supported and arranged between the arc extinguish chamber 3 and the movable end conductive block.
The top border of the arc extinguish chamber supporting block 98 here is also positioned and assembled with a supporting cover plate 97, the border of the supporting cover plate 97 is provided with an annular sleeve, and the annular sleeve is positioned and inserted with the step at the lower end of the arc extinguish chamber 3 to play a role in radially fixing the arc extinguish chamber.
The arc extinguish chamber supporting block 98 is annular and is sleeved outside the movable conducting rod 9, and a radial through hole is formed in the arc extinguish chamber supporting block 98 and communicated with the inside and the outside of the arc extinguish chamber supporting block. In this embodiment, set up the guide structure who extends along upper and lower direction between explosion chamber supporting shoe 98 and the end conducting block that moves, guide structure here specifically includes guide post and direction perforation 44, the guide post is installed on the explosion chamber supporting shoe, and it is a plurality of along explosion chamber supporting shoe circumference interval distribution in proper order, direction perforation 44 then sets up on moving the end conducting block, specifically set up on last conducting block 4, equally, direction perforation 44 distributes a plurality ofly along last conducting block circumference, in order to insert with the direction of a plurality of guide post one-to-ones.
On the whole, be equipped with corresponding conducting rod perforation on moving the end conducting block, supply to move conducting rod 9 and pass in order to be connected with insulating pull rod 7 transmission, on this basis, move the end conducting block and will be connected with moving conducting rod 9 through the electrically conductive contact finger that is provided with in the perforation, and then by moving end conducting block, electrically conductive support section of thick bamboo 8, move end conducting flange 1 with the voltage transmission of explosion chamber end to move on the lower terminal outlet 96 on the end conducting flange 1, guarantee vacuum circuit breaker's normal work.
Specifically, the movable end conductive block comprises an upper conductive block 4 and a lower conductive block 5, the two conductive blocks are vertically and fixedly assembled together, a through conductive rod through hole is formed in each conductive block and is used for the movable conductive rod 9 to penetrate through, and actually, a conductive contact finger is fixedly arranged in the conductive rod through hole of the upper conductive block 4 and is used for being in sliding conductive contact with the movable conductive rod 9 to ensure current transmission.
Be equipped with upper bolt mounting hole 43 on last conducting block 4, set up lower bolt mounting hole 52 on the conducting block 5 down, upper and lower bolt mounting hole is corresponding to link up, and the bolt mounting hole on every conducting block all distributes a plurality ofly along circumference interval, and during the use, through wearing to adorn fastening bolt, and then with two conducting blocks fixed assembly together.
In this embodiment, the conductive support cylinder 8 and the movable end conductive flange 1 are integrally formed parts, the bottom of the part is a flange plate, the upper side of the flange plate integrally protrudes upwards to form a cylinder body, the flange plate forms the movable end conductive flange, and the cylinder body forms a corresponding conductive support cylinder. Of course, in other embodiments, the conductive support cylinder and the movable end conductive flange may also be in a split structure, and the lower end of the conductive support cylinder may be provided with an annular outward-turned edge, and the annular outward-turned edge may be fastened and assembled with the movable end conductive flange by a fastening bolt.
The movable end conductive flange 1 is provided with a flange mounting hole, and during assembly, the movable end conductive flange 1 and the lower connecting flange 90 at the bottom of the outer sleeve 1 are fixedly assembled through the connecting bolt, so that the fixed assembly of the fixed supporting structure and the outer sleeve can be realized. Two lower outlet terminals 96 which are symmetrically arranged are integrally arranged on the movable end conductive flange 1 and are used for being fixedly connected with an external lead.
And a lower through hole for the insulation pull rod to penetrate out is reserved in the center of the movable end conductive flange 1, and the lower through hole is hermetically assembled with the insulation pull rod 7 so as to seal the insulation gas in the outer sleeve. In practice, an insulating gas is arranged inside the outer casing 2, and accordingly, a plurality of through holes 81 are provided on the wall of the conductive support cylinder 8 to pass through the conductive support cylinder inside and outside. The insulating gas can serve to transfer heat, and in other embodiments, an insulating liquid can be used as long as the insulating property is ensured.
The conductive support cylinder 8 is matched with a movable end conductive block jacking, a boss is arranged on the lower side of the movable end conductive block, in fact, the boss is formed by a lower conductive block 5, the lower conductive block 5 is matched with the conductive support cylinder 8 in an inserted mode, the top end of the conductive support cylinder 8 is matched with the lower side face jacking of an upper conductive block 4, a plurality of guide pins 41 are arranged on the upper conductive block 4 at intervals around the lower conductive block 5, the guide pins 41 are fixedly installed in guide pin installation holes 42 formed in the upper conductive block 4, all the guide pins 41 extend in the up-down direction, correspondingly, a plurality of guide holes 82 are formed in the top end face of the conductive support cylinder 8, the guide holes 82 are uniformly distributed at intervals along the circumferential direction of the conductive support cylinder 8, all the guide holes 82 extend in the up-down direction, all the guide pins 41 are in one-to-one guide insertion connection with all the guide holes 82, and the movable end conductive block is matched with the conductive.
In this embodiment, the heat at the movable end of the arc extinguish chamber is transferred to the outside through the movable conducting rod 9, the movable end conducting block, the conductive supporting cylinder 8 and the movable end conductive flange 1, so as to realize heat dissipation and cooling. In order to improve the heat transfer efficiency and the heat dissipation performance, a plurality of moving end heat pipes are arranged in a targeted manner, the moving end heat pipes 6 are distributed at intervals around an insulating pull rod 7 and are arranged on the inner side of a conductive support cylinder 8, each moving end heat pipe 6 comprises an upper evaporation section, a middle heat insulation section and a lower condensation section, the middle of each moving end heat pipe is a middle straight pipe section 62 in shape, the upper part of the upper evaporation section is bent inwards to form an upper bent section 61, the lower part of the lower condensation section is bent inwards to form a lower bent section 63, the upper bent section 61 is clamped and fixed by two conductive blocks to realize the heat conduction contact between the upper bent section 61 and the moving end conductive block, meanwhile, the moving end heat pipes 6 and the moving end conductive block are fixedly assembled together, so that the lower bent section 63 is supported on the moving end conductive flange 1 to realize the heat conduction contact between the lower condensation section and the moving end conductive flange 1, in particular, the lower bending section props up the area, between the lower through hole and the conductive support cylinder, of the movable end conductive flange.
In order to improve the assembly stability, the outer peripheral surface of the lower conductive block 5 is provided with a plurality of heat pipe positioning grooves 51, the heat pipe positioning grooves 51 are sequentially distributed at intervals along the circumferential direction of the lower conductive block 5, each heat pipe positioning groove 51 is communicated along the up-down direction, and during assembly, the heat pipes 6 at the movable ends are positioned in the heat pipe positioning grooves 51 in a one-to-one correspondence manner.
And, be equipped with a plurality of holding tanks on the upper side face of lower conducting block 5, the holding tank extends along lower conducting block radial for hold the upper portion kinking of heat pipe, and the upper portion kinking here is not held into completely, has a part to arrange protrudingly. In other embodiments, the receiving groove has a sufficient depth to completely receive the upper bend segment.
In the embodiment, the vacuum circuit breaker is arranged up and down, the moving end is usually positioned below, for the moving end heat pipe 6, the upper evaporation section is positioned above the lower condensation section, the gravity heat pipe is not suitable for being adopted, but the non-gravity heat pipe is adopted, and the liquid working medium backflow is realized mainly by virtue of the capillary structure of the heat pipe.
In the vacuum circuit breaker that this embodiment provided, can improve the efficiency of the quiet end heat of explosion chamber to the transmission of quiet end conductive flange through quiet end heat pipe, then can improve the explosion chamber and move the efficiency of end heat to the transmission of moving end conductive flange through moving the end heat pipe, and then can effectively improve the radiating rate at vacuum explosion chamber sound both ends, effectively solved the problem that vacuum explosion chamber sound both ends temperature is too high, the temperature when can corresponding reduction circuit breaker temperature rise test, improve the ability of circuit breaker when passing through the temperature rise test.
Moreover, because the movable end heat pipes are arranged around the insulating pull rod, the setting space is larger, the number of the movable end heat pipes can be increased according to actual heat dissipation requirements on the basis that the radial sizes of the movable conducting rod, the conductive supporting cylinder and the outer sleeve are not additionally increased, and the heat dissipation performance of the circuit breaker can be effectively improved.
The specific embodiment 2 of the vacuum circuit breaker provided by the invention:
the difference from example 1 is mainly that: in embodiment 1, the upper bending section of the moving-end heat pipe is clamped and fixed by the upper conductive block and the lower conductive block, and is mainly clamped by the lower side surface of the upper conductive block and the upper side surface of the upper conductive block, the lower side surface of the upper conductive block is a plane, and the upper side surface of the lower conductive block is provided with a corresponding accommodating groove. In this embodiment, the lower side surface of the upper conductive block and the lower side surface of the lower conductive block can be respectively provided with an accommodating groove extending along the radial direction of the conductive block, so as to accommodate the upper bending section of the movable end heat pipe, and the accommodating groove on the upper conductive block and the accommodating groove on the lower conductive block can be correspondingly buckled.
Of course, in other embodiments, the receiving groove may be provided only on the lower side of the upper conductive block for receiving the upper bent section of the heat pipe.
the difference from example 1 is mainly that: in embodiment 1, the lower bending section of the moving-end heat pipe bends inward and extends, and is matched with the moving-end conductive flange top support, so as to realize the heat conduction contact between the moving-end heat pipe and the moving-end conductive flange. In this embodiment, a portion of the lower condensation section of the movable end heat pipe is a straight pipe section, and the straight pipe section can be in heat conduction contact with the inner wall of the conductive support cylinder, so that the heat conduction contact between the lower condensation section and the conductive support cylinder can be realized.
the difference from example 1 is mainly that: in embodiment 1, the upper evaporation section of the movable end heat pipe is bent inward to form an upper bending section, which is convenient to clamp and fix by two conductive blocks. In this embodiment, a plurality of through holes extending in the up-down direction may be formed in the movable end conductive block, and the upper evaporation section of the movable end heat pipe may be inserted into the through holes of the movable end conductive block in a tight fit manner, so as to achieve the heat-conducting contact between the movable end heat pipe and the movable end conductive block. Correspondingly, the heat pipe positioning groove on the movable end conducting block can be omitted.
In this case, the movable end conductive block may be an integral structure, and the structure of the two conductive blocks in embodiment 1 may not be adopted. Of course, in order to facilitate the positioning and inserting with the guiding support cylinder, a boss can be arranged at the lower part of the movable end conductive block, and the boss and the guiding support cylinder are positioned and inserted.
the difference from example 1 is mainly that: in embodiment 1, the conductive block at the moving end is provided with a guide pin, and the conductive support cylinder is provided with a guide hole. In this embodiment, the guide hole is formed in the movable end conductive block, and the guide pin is formed in the conductive support cylinder, so that the guide insertion and assembly of the movable end conductive block and the conductive support cylinder can be realized.
Of course, in other embodiments, the guide pin and the guide hole may be omitted, and the guide insertion of the inner cylinder wall of the guide support cylinder and the outer circumferential surface of the movable end conductive block may be realized by the guide fit of the inner cylinder wall of the guide support cylinder and the outer circumferential surface of the movable end conductive block.
the difference from example 1 is mainly that: in embodiment 1, an arc-extinguishing chamber supporting block is provided between the arc-extinguishing chamber and the movable-end conductive block to form a space between the arc-extinguishing chamber and the movable-end conductive block. In this embodiment, the arc extinguish chamber support block may be omitted, and the movable end conductive block may be directly pressed and supported with the lower end of the arc extinguish chamber, but the thickness of the movable end conductive block is larger at this time to correspond to the reciprocating stroke of the movable conductive rod.
the difference from example 1 is mainly that: in embodiment 1, a conductive finger is provided in a conductive rod through hole of an upper conductive block. In this embodiment, the conductive contact finger may be disposed in the conductive rod through hole of the lower conductive block.
In other embodiments, conductive contact fingers may be disposed in the through holes of the conductive rods of the two conductive blocks, respectively, to achieve conductive connection with the movable conductive rod.
Finally, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments without departing from the inventive concept, or some of the technical features may be replaced with equivalents. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A vacuum interrupter, comprising:
the inner part of the outer sleeve is provided with an arc extinguish chamber, the arc extinguish chamber comprises a downward extending movable conducting rod, and the lower end of the movable conducting rod is connected with an insulating pull rod in a transmission way;
the fixed supporting structure is fixedly assembled with the bottom end of the outer sleeve, and the upper part of the fixed supporting structure penetrates into the outer sleeve to support the arc extinguish chamber;
the fixed supporting structure comprises a movable end conductive block, a conductive supporting cylinder and a movable end conductive flange which are sequentially in conductive connection from top to bottom, the movable end conductive block is in conductive connection with the movable conductive rod, and a lower outlet terminal is arranged on the movable end conductive flange;
it is characterized by also comprising:
and the movable end heat pipes comprise an upper evaporation section and a lower condensation section, the plurality of movable end heat pipes are arranged around the insulating pull rod, the upper evaporation section of each movable end heat pipe is in heat conduction contact with the movable end conductive block, and the lower condensation section of each movable end heat pipe is in heat conduction contact with the conductive support cylinder and/or the movable end conductive flange.
2. The vacuum circuit breaker according to claim 1, wherein the moving end conductive block comprises an upper conductive block and a lower conductive block which are fixedly assembled together from top to bottom, the two conductive blocks are provided with through conductive rod through holes, and conductive contact fingers are arranged in the conductive rod through holes of the upper conductive block and/or the lower conductive block so as to be electrically connected with the moving conductive rod; the upper evaporation section is bent inwards to form an upper bending section, and the upper bending section is arranged between the two conductive blocks so as to be clamped and fixed by the two conductive blocks.
3. Vacuum interrupter according to claim 2, characterized in that the lower side of the upper and/or lower conducting block is provided with a receiving groove extending in radial direction of the conducting block for receiving the upper bending section.
4. The vacuum circuit breaker according to claim 2, wherein the outer peripheral surface of the lower conductive block is provided with a plurality of heat pipe positioning grooves, the heat pipe positioning grooves are vertically penetrated and sequentially distributed at intervals along the circumferential direction of the lower conductive block, and the heat pipes at the moving ends are positioned in the heat pipe positioning grooves in a one-to-one correspondence manner.
5. The vacuum circuit breaker according to any one of claims 1 to 4, wherein the movable end conductive block is matched with the top support of the conductive support cylinder, one of the movable end conductive block and the conductive support cylinder is uniformly provided with a plurality of guide pins at intervals along the circumferential direction thereof, the other one of the movable end conductive block and the conductive support cylinder is uniformly provided with a plurality of guide holes at intervals along the circumferential direction thereof, the guide pins and the guide holes extend along the up-down direction, and the movable end conductive block and the conductive support cylinder are correspondingly inserted and connected in a guiding manner so as to guide the movable end conductive block to be matched with the top support of the conductive support cylinder.
6. The vacuum circuit breaker as claimed in claim 5, wherein the guide pin is fixed on the movable end conductive block, a downward protruding boss is provided on the lower side of the movable end conductive block, and the guide pin is disposed around the outer side of the boss.
7. The vacuum circuit breaker according to any one of claims 1 to 4, wherein the lower condensation section of the moving-end heat pipe is bent inward to form a lower bent section, and the lower bent section is supported on the moving-end conductive flange to realize the heat-conductive contact between the lower condensation section and the moving-end conductive flange.
8. The vacuum circuit breaker according to claim 7, wherein the movable end conductive flange and the conductive support cylinder are integrally formed, a lower through hole for the insulation pull rod to pass through is reserved in the center of the movable end conductive flange, the lower through hole is hermetically assembled with the insulation pull rod, and the lower bent section supports against an area of the movable end conductive flange, which is located between the lower through hole and the conductive support cylinder.
9. The vacuum circuit breaker according to claim 8, wherein the outer casing has an insulating fluid disposed therein, and the conductive support cylinder has a plurality of through holes formed in a wall thereof to pass through the conductive support cylinder.
10. The vacuum circuit breaker according to any one of claims 1 to 4, wherein an arc extinguish chamber support block is supported between the movable end conductive block and the arc extinguish chamber, the arc extinguish chamber support block is in a ring shape and is sleeved outside the movable conductive rod, a radial through hole is formed in the arc extinguish chamber support block to communicate the inside and the outside of the arc extinguish chamber support block, and a guide structure extending in the up-and-down direction is arranged between the arc extinguish chamber support block and the movable end conductive block to guide the movable end conductive block to be upwards assembled with the arc extinguish chamber support block in a supporting manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010837051.5A CN112216552B (en) | 2020-08-19 | 2020-08-19 | Vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010837051.5A CN112216552B (en) | 2020-08-19 | 2020-08-19 | Vacuum circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112216552A true CN112216552A (en) | 2021-01-12 |
| CN112216552B CN112216552B (en) | 2023-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010837051.5A Active CN112216552B (en) | 2020-08-19 | 2020-08-19 | Vacuum circuit breaker |
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| Country | Link |
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| CN (1) | CN112216552B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113745043A (en) * | 2021-07-26 | 2021-12-03 | 平高集团有限公司 | Vacuum circuit breaker and supporting conductor structure thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1963971A (en) * | 2006-11-14 | 2007-05-16 | 西安交通大学 | High voltage vacuum circuit breaker with high rated current |
| CN1963972A (en) * | 2006-11-14 | 2007-05-16 | 西安交通大学 | High voltage vacuum circuit breaker with high rated current value |
| CN204289233U (en) * | 2014-10-15 | 2015-04-22 | 中国西电电气股份有限公司 | High-pressure vacuum breaker |
| CN110911216A (en) * | 2019-10-31 | 2020-03-24 | 许昌许继软件技术有限公司 | Open-type arc extinguish chamber pole and switch cabinet |
-
2020
- 2020-08-19 CN CN202010837051.5A patent/CN112216552B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1963971A (en) * | 2006-11-14 | 2007-05-16 | 西安交通大学 | High voltage vacuum circuit breaker with high rated current |
| CN1963972A (en) * | 2006-11-14 | 2007-05-16 | 西安交通大学 | High voltage vacuum circuit breaker with high rated current value |
| CN204289233U (en) * | 2014-10-15 | 2015-04-22 | 中国西电电气股份有限公司 | High-pressure vacuum breaker |
| CN110911216A (en) * | 2019-10-31 | 2020-03-24 | 许昌许继软件技术有限公司 | Open-type arc extinguish chamber pole and switch cabinet |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113745043A (en) * | 2021-07-26 | 2021-12-03 | 平高集团有限公司 | Vacuum circuit breaker and supporting conductor structure thereof |
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| Publication number | Publication date |
|---|---|
| CN112216552B (en) | 2023-09-26 |
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