CN215680507U - Direct-acting three-position switch and gas insulation switch cabinet with same - Google Patents
Direct-acting three-position switch and gas insulation switch cabinet with same Download PDFInfo
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- CN215680507U CN215680507U CN202121565909.3U CN202121565909U CN215680507U CN 215680507 U CN215680507 U CN 215680507U CN 202121565909 U CN202121565909 U CN 202121565909U CN 215680507 U CN215680507 U CN 215680507U
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Abstract
The utility model relates to a direct-acting three-position switch and a gas insulated switchgear with the same, wherein the direct-acting three-position switch comprises: the grounding contact seat and the isolation static contact cylinder are coaxially arranged relative to each other at intervals; insulating sleeve, it includes both ends butt joint respectively to the ground connection touches the seat and is close to keep apart the terminal surface of quiet touch section of thick bamboo with keep apart quiet touch section of thick bamboo and be close to the ground connection touches the intermediate section of the terminal surface of seat and certainly the both ends of intermediate section extend to respectively the ground connection touch the outer wall of seat with keep apart the outer wall of quiet touch section of thick bamboo with respectively with the both ends of intermediate section constitute two connecting portion sections at corner, make insulating sleeve will keep apart quiet touch section of thick bamboo coaxial fixed connection to the ground connection touch the seat and become the monomer formula structure, and the cladding ground connection touch the seat with keep apart the border of the end that quiet touch section of thick bamboo is close to each other.
Description
Technical Field
The utility model relates to the technical field of electrical equipment, in particular to a direct-acting three-position switch and a gas insulation switch cabinet with the same.
Background
Electrical products such as gas insulated switchgear are widely used in power systems due to their advantages of small size and high safety. In a gas insulated switchgear, an insulating gas such as sulfur hexafluoride is generally used to seal electrical components such as a circuit breaker, a disconnecting switch, an earthing switch, and the like in a cabinet body, so as to achieve control of connection, disconnection, and earthing of a line. In order to avoid misoperation, a three-position switch such as a direct-acting three-position switch is generally adopted to integrate functions of an isolating switch and an earthing switch, but for the direct-acting three-position switch, the coaxiality of an earthing contact seat and an isolating static contact cylinder is particularly required to be considered in the installation process so as to avoid influencing the movement of a movable contact relative to the movable contact and the connection and disconnection of the movable contact and the earthing contact respectively.
However, in the prior art, the grounding contact seat is usually installed to the cabinet body of the switch cabinet first, and then the isolation static contact cylinder is connected to the grounding contact seat through the insulation connecting cylinder, which needs to involve a plurality of processes to affect the installation efficiency, and easily causes the problem of poor coaxiality of the grounding contact seat and the isolation static contact cylinder. In addition, the fracture between the grounding contact base and the isolation static contact cylinder usually causes uneven electric field distribution under the action of voltage, so that the insulation requirement of the direct-acting three-position switch is high.
There is therefore a need in the art for a direct acting three position switch that is efficient to install, has good concentricity, and has low insulation requirements.
SUMMERY OF THE UTILITY MODEL
The present invention aims to provide a direct acting three position switch which solves at least some of the problems described above.
The utility model also aims to provide a gas insulated switch cabinet applying the improved direct-acting three-position switch.
According to an aspect of the present invention, there is provided a direct-acting three-position switch, including: the grounding contact seat and the isolation static contact cylinder are coaxially arranged relative to each other at intervals; insulating sleeve, it includes both ends butt joint respectively to the ground connection touches the seat and is close to keep apart the terminal surface of quiet touch section of thick bamboo with keep apart quiet touch section of thick bamboo and be close to the ground connection touches the intermediate section of the terminal surface of seat and certainly the both ends of intermediate section extend to respectively the ground connection touch the outer wall of seat with keep apart the outer wall of quiet touch section of thick bamboo with respectively with the both ends of intermediate section constitute two connecting portion sections at corner, make insulating sleeve will keep apart quiet touch section of thick bamboo coaxial fixed connection to the ground connection touch the seat and become the monomer formula structure, and the cladding ground connection touch the seat with keep apart the border of the end that quiet touch section of thick bamboo is close to each other.
Compared with the prior art, the direct-acting three-position switch has the advantages that the grounding contact seat and the isolation static contact cylinder are coaxially connected through the insulating sleeve to form a single-body structure, so that the isolation static contact cylinder can be synchronously installed when the grounding contact seat is installed on the gas insulated switchgear, the operation is convenient, and the poor coaxiality of the grounding contact seat and the isolation static contact cylinder caused by multiple operation procedures is avoided. In addition, the insulating sleeve provided by the utility model can coat the edges of the opposite ends of the grounding contact seat and the isolating static contact cylinder which are opposite at intervals, so that the stress concentration at the ends is avoided, the electric field distribution between the grounding contact seat and the isolating static contact cylinder is optimized, the insulating effect is improved, and further, the environment-friendly gas such as nitrogen can be used for filling in the gas insulating switch cabinet applied to the direct-acting three-position switch.
Preferably, the inner wall of the middle section does not extend beyond the inner walls of the grounding contact seat and the isolating static contact cylinder, and the outer wall of the middle section extends beyond the outer walls of the grounding contact seat and the isolating static contact cylinder; two the connecting portion section certainly the both ends face of mid portion section extends respectively and surpasss ground connection touches the seat with the part of keeping apart a static touch section of thick bamboo extends respectively to the outer wall that the seat was touched to ground connection touches with the outer wall of keeping apart a static touch section of thick bamboo.
Preferably, the insulating sleeve is connected to the ground contact and the isolating stationary contact without a gap.
Preferably, the grounding contact seat and the isolation static contact cylinder are provided with two first connecting parts on the outer wall covered by the connecting part sections, and the inner sides of the connecting part sections are provided with second connecting parts which are connected with the first connecting parts in a matched mode.
Preferably, the first and second connecting portions are configured as a protrusion and a groove that mate with each other.
Preferably, the outer diameter of the grounding contact seat is larger than that of the isolating static contact cylinder; and the outer wall of the connecting section connected to the grounding contact seat in the two connecting sections is smoothly transited to the outer wall of the middle section.
Preferably, the middle section is provided with heat dissipation holes.
Preferably, the ground contact is configured as a flange structure.
According to another aspect of the utility model, a gas-insulated switchgear is provided, comprising the aforementioned direct-acting three-position switch.
Additional features and advantages of the utility model will be set forth in part in the description which follows, and in part will be apparent to those having ordinary skill in the art upon examination of the following, or may be learned from the practice of the utility model.
Drawings
Embodiments of the utility model are described in detail below with reference to the attached drawing figures, wherein:
fig. 1 is a cross-sectional view of a direct acting three position switch according to the present invention.
Description of reference numerals:
10-direct-acting three-position switch; 11-a ground contact; 111-a flange; 12-an isolation static contact cylinder; 13-an insulating sleeve; 131-an intermediate section; 132-a connecting section; 133-a first louvers; 14-a first connection; 15-a second connection; 16-a drive mechanism; 161-a mount; 162-an operating shaft; 163-screw rod; 17-moving contact; 171-a second louver; 18-closing contact seat; 19-a stylus; 21-front panel of gas-insulated switchgear cabinet.
Detailed Description
Referring now to the drawings, a schematic of the disclosed direct acting three position switch and the gas insulated switchgear utilized therewith will be described in detail. Although the drawings are provided to present some embodiments of the utility model, the drawings are not necessarily to scale of particular embodiments, and certain features may be exaggerated, removed, or partially sectioned to better illustrate and explain the present disclosure. The position of some components in the drawings can be adjusted according to actual requirements on the premise of not influencing the technical effect. The appearances of the phrase "in the drawings" or similar language in the specification are not necessarily referring to all drawings or examples.
Certain directional terms used hereinafter to describe the drawings, such as "inner", "outer", "above", "below", and other directional terms, will be understood to have their normal meaning and refer to those directions as they normally relate to when viewing the drawings. Unless otherwise indicated, the directional terms described herein are generally in accordance with conventional directions as understood by those skilled in the art.
The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.
As used herein, the terms "joined," "connected," and the like, are intended to encompass both components which are indirectly joined together through intervening layers (e.g., adhesives, welds, etc.) or intermediate members (e.g., connectors, transitions, etc.), and components which are directly joined together without any intervening layers (e.g., adhesives, welds, etc.) or intermediate members (e.g., connectors, transitions, etc.).
Fig. 1 shows by way of example a direct acting three position switch 10 of the present invention, which direct acting three position switch 10 can be mounted to the inside of a gas insulated switchgear cabinet to enable control of the connection, disconnection and grounding of the lines. As shown, the direct-acting three-position switch 10 may include a ground contact 11, an isolation stationary contact 12, and an insulating sleeve 13 connecting the ground contact 11 and the isolation stationary contact 12.
Specifically, the grounding contact base 11 and the isolation stationary contact cylinder 12 can be coaxially arranged at intervals relative to each other, and are sleeved to the adjacent end parts of the grounding contact base 11 and the isolation stationary contact cylinder 12 through the insulating sleeve 13 to form a single-body structure, so that when the end part of the grounding contact base 11 far away from the isolation stationary contact cylinder 12 is installed on the inner side of the cabinet body of the gas insulated switchgear, the isolation stationary contact cylinder 12 can be synchronously connected to the inner side of the gas insulated switchgear in a posture of being coaxially arranged with the grounding contact base 11, a process of sequentially installing the grounding contact base 11, the insulating sleeve 13 and the isolation stationary contact cylinder 12 is avoided, the efficiency is high, and the problem that the coaxiality between the grounding contact base 11 and the isolation stationary contact cylinder 12 is poor due to errors after the installation of the gas insulated switchgear is avoided. Alternatively, the ground contact 11 may be configured as a flange structure, in particular an aluminum flange structure, which is simple and may facilitate mounting to the gas-insulated switchgear. The outer wall of the grounding contact seat 11 may extend in the circumferential direction to the radial outside to form a flange 111, and threaded holes distributed around the circumferential direction are provided on the flange 111 to connect to the cabinet body of the gas insulated switchgear through screws.
The insulating sleeve 13 may be configured to include an intermediate section 131 and two connecting sections 132 extending from both ends of the intermediate section 131. The middle section 131 can be regarded as being located between the grounding contact seat 11 and the isolation static contact cylinder 12, i.e. both ends thereof abut against the end surface of the grounding contact seat 11 adjacent to the isolation static contact cylinder 12 and the end surface of the isolation static contact cylinder 12 adjacent to the grounding contact seat 11, respectively. The two connecting sections 132 can extend from the two ends of the middle section 131 to the outer wall of the grounding contact base 11 and the outer wall of the isolation stationary contact cylinder 12 respectively to form corners in cooperation with the two ends of the middle section 131, so that when the isolation stationary contact cylinder 12 is fixedly connected to the grounding contact base 11, the end edge of the grounding contact base 11 adjacent to the isolation stationary contact cylinder 12 and the end edge of the isolation stationary contact cylinder 12 adjacent to the grounding contact base 11 can be wrapped, electric field concentration caused by tips when the grounding contact base 11 and the isolation stationary contact cylinder 12 are in a working state is avoided, electric field distribution between the grounding contact base 11 and the isolation stationary contact cylinder 12 is optimized, and therefore, an insulation effect is improved, and the gas insulation switch cabinet applied to the direct-acting three-position switch 10 can be filled with environment-friendly gas such as nitrogen instead of sulfur hexafluoride.
Alternatively, the inner wall of the middle section 131 may extend radially inward beyond the inner walls of the ground contact base 11 and the isolated stationary contact cylinder 12, and the outer wall may extend radially outward beyond the outer walls of the ground contact base 11 and the isolated stationary contact cylinder 12, thereby facilitating the connection of the subsequent connection section 132 with the ground contact base 11 and the isolated stationary contact cylinder 12 and avoiding interference with the communication space from the inside of the ground contact base 11 to the inside of the isolated stationary contact cylinder 12. The two connecting sections 132 may extend from portions of the two end surfaces of the intermediate section 131 that extend beyond the outer walls of the ground contact 11 and the isolation static contact cylinder 12 to the outer wall of the ground contact 11 and the outer wall of the isolation static contact cylinder 12, respectively. Wherein, the outer walls of the two connecting sections 132 and the outer wall of the middle section 131 can form a continuous line to avoid the formation of a tip.
Alternatively, both ends of the insulating sleeve 13 may be sleeved to the grounding contact base 11 and the isolating stationary contact cylinder 12 without a gap, that is, both ends of the middle section 131 are in close contact with the end surfaces of the grounding contact base 11 and the isolating stationary contact and the inner sides of the two connecting sections 132 are in close contact with the outer wall of the grounding contact base 11 and the outer wall of the isolating stationary contact cylinder 12, respectively, so that a gap between the assembled grounding contact base 11 and the isolating stationary contact cylinder 12 and the insulating sleeve 13 may be avoided, and further, an uneven distribution of an electric field between the grounding contact base 11 and the isolating stationary contact cylinder 12 due to a high electric field strength in the gap in an operating state may be avoided, thereby further improving an insulating effect. Illustratively, the insulating sleeve 13 may be cast using an epoxy casting material. For example, the grounding contact 11 and the insulating stationary contact 12, which are coaxially arranged at intervals, are placed in a mold, an epoxy resin casting material which is flowable after heating is poured into the mold, and then the poured epoxy resin casting material is cured to form the insulating sleeve 13 while being connected to the grounding contact 11 and the insulating stationary contact 12 without a gap and connecting the grounding contact 11 and the insulating stationary contact 12 together.
Optionally, the outer walls of the grounding contact block 11 and the isolation static contact cylinder 12 covered by the two connection sections 132 may be provided with the first connection portion 14, and the inner sides of the two connection sections 132 may be provided with the second connection portion 15 cooperatively connected with the first connection portion 14, so as to increase the connection strength between the insulating sleeve 13 and the grounding contact block 11 and the isolation static contact cylinder 12. The first connecting portion 14 is formed on the outer walls of the grounding contact seat 11 and the isolated stationary contact 12, so that a non-smooth plane is formed, and the electric field concentration condition can be further avoided by covering the non-smooth plane with the insulating connecting portion 132, so as to further optimize the electric field. In addition, according to the foregoing, the first connection portion 14 and the second connection portion 15 can be formed in a gapless connection by a casting process, so as to further reduce the electric field concentration between the contact surfaces of the two. Illustratively, the first connection portion 14 and the second connection portion 15 may be a protrusion and a groove that are fitted to each other. As shown in fig. 1, the first connection portion 14 is configured as a protrusion and the second connection portion 15 is configured as a groove. In practice, the first connection portion 14 may be configured as a recess and the second connection portion 15 may be configured as a protrusion. In another embodiment, the configurations of the first connecting portion 14 on the outer wall of the grounding contact holder 11 and the first connecting portion 14 on the outer wall of the isolated static contact 12 may be different, for example, the number of the protrusions or the grooves is different, or the distance between adjacent protrusions or grooves in a plurality of protrusions or grooves is different, etc., and the second connecting portion 15 which is selected according to actual requirements and is mutually matched with the different first connecting portion 14 may be correspondingly changed.
Alternatively, the ground contact 11 may be provided as a support end mounted to the gas insulated switchgear, and may have a size slightly larger than that of the insulating stationary contact 12. Thereby, the outer diameter of the end of the grounding contact block 11 adjacent to the isolation stationary contact cylinder 12 may be larger than the outer diameter of the end of the isolation stationary contact cylinder 12 adjacent to the grounding contact block 11, so that the configuration of the two connection sections 132 may be different, and the outer wall of the connection section 132 connected to the grounding contact block 11 of the two connection sections 132 may smoothly transition to the outer wall of the middle section 131, so that the outer wall of the insulating sleeve 13 forms a continuous line.
Optionally, the direct acting three-position switch 10 may further include a driving mechanism 16, a movable contact 17 and a closing contact 18.
Among them, as shown in fig. 1, the driving mechanism 16 may include a mounting base 161 mounted to the center of the ground contact 11, an operating shaft 162 located outside the gas insulated switchgear and axially connected to the mounting base 161, and a screw 163 located inside the gas insulated switchgear and axially connected to the operating shaft 162. The lead screw 163 may extend in the axial direction along the ground contact 11 to an end portion of the isolation stationary contact 12 away from the ground contact 11, and thus the movable contact 17 may be configured in a cylindrical shape and one end inside thereof is sleeved on the lead screw 163 via a lead screw nut. The closing contact 18 may be located on the other side of the isolating stationary contact cylinder 12 with respect to the grounding contact 11 and arranged coaxially with the isolating stationary contact cylinder 12 on the body of the gas-insulated switchgear, e.g. the grounding contact 11 and the closing contact 18 may be arranged on the front plate 21 and the rear plate of the gas-insulated switchgear, respectively. It should be noted that the operating shaft 162, the lead screw 163, the grounding contact 11, the isolating stationary contact 12, the movable contact 17 and the closing contact 18 are preferably coaxial. In addition, the inner side of the end of the grounding contact 11 adjacent to the isolation static contact 12, the inner side of the two ends of the isolation static contact 12, and the inner side of the end of the closing contact 18 may be provided with contact fingers 19.
Therefore, the operating shaft 162 can rotate relative to the grounding contact 11 under the action of an external force and drive the screw rod 163 to rotate, so that the movable contact 17 can move axially relative to the screw rod 163 under the rotation of the screw rod 163, and thus the movable contact 17 can move to a grounding position, an isolating position and a switching-on position relative to the grounding contact 11, the isolating static contact 12 and the switching-on contact 18, and the movable contact 17 shown in fig. 1 is in the switching-on position. Specifically, taking the left-right direction of the page in fig. 1 as an example, when the movable contact 17 moves to the end of the stroke in the left-hand direction relative to the lead screw 163, the movable contact 17 is located at the grounding position, the left end thereof enters the grounding contact block 11 and the outer side of the left end thereof is in close contact with the contact finger 19 in the grounding contact block 11, the right end thereof is located in the end portion of the isolated stationary contact 12 adjacent to the grounding contact block 11 and the outer side of the right end thereof is in close contact with the contact finger 19 of the isolated stationary contact 12 adjacent to the grounding contact block 11. When the movable contact 17 moves relative to the screw 163 from the grounding position to the isolating position, the movable contact 17 is accommodated in the isolating static contact cylinder 12 and the outer sides of the two ends of the movable contact 17 are in close contact with the contact fingers 19 at the two ends of the isolating static contact cylinder 12. When the movable contact 17 moves from the isolation position to the closing position relative to the lead screw 163, the left end of the movable contact is located in the end portion of the isolation static contact cylinder 12 adjacent to the closing contact seat 18, so that the outer side of the left end of the movable contact is in close contact with the contact finger 19 at the right end of the isolation static contact cylinder 12, and the right end of the movable contact extends out of the isolation static contact cylinder 12 and enters the closing contact seat 18, so that the outer side of the right end is in close contact with the contact finger 19 of the closing contact seat 18. Thereby enabling ground, open and close control of the line.
Optionally, the movable contact 17 may also be provided with heat dissipation holes. For convenience of illustration, the heat dissipation holes on the insulating sleeve 13 are denoted by the first heat dissipation hole 133 in fig. 1, and the heat dissipation holes on the movable contact 17 are denoted by the second heat dissipation hole 171 in fig. 1. When the moving contact 17 moves to the grounding position, the first heat dissipation hole 133 and the second heat dissipation hole 171 can be communicated to enhance the heat dissipation effect.
It should be understood that although the description is in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent alterations, modifications and combinations can be made by those skilled in the art without departing from the spirit and principles of the utility model.
Claims (9)
1. A direct-acting three-position switch (10), characterized in that the direct-acting three-position switch (10) comprises:
a grounding contact base (11) and an isolating static contact cylinder (12), the grounding contact base (11) and the isolating static contact cylinder (12) being coaxially spaced relative to each other;
insulating sleeve (13), its include both ends respectively butt joint to ground connection touches seat (11) and is close to the terminal surface of isolation static contact section of thick bamboo (12) with isolation static contact section of thick bamboo (12) is close to the intermediate segment (131) of the terminal surface of ground connection touch seat (11) and certainly the both ends of intermediate segment (131) extend to respectively the outer wall of ground connection touch seat (11) with the outer wall of isolation static contact section of thick bamboo (12) with respectively with two connecting portion sections (132) at the both ends constitution corner of intermediate segment (131), make insulating sleeve (13) will keep apart static contact section of thick bamboo (12) coaxial ground fixed connection to ground connection touches seat (11) and forms into the monolithic structure, and the cladding ground connection touch seat (11) with the border of the tip that isolation static contact section of thick bamboo (12) is close to each other.
2. The direct-acting three-position switch (10) according to claim 1, characterized in that the inner wall of the intermediate section (131) does not extend beyond the inner walls of the grounding contact base (11) and the isolating stationary contact cylinder (12), and the outer wall of the intermediate section (131) extends beyond the outer walls of the grounding contact base (11) and the isolating stationary contact cylinder (12); two connecting portion section (132) certainly the both ends face of intermediate part section (131) extends respectively and surpasss ground connection touches seat (11) with the part of keeping apart static contact section of thick bamboo (12) extends respectively the outer wall that ground connection touched seat (11) with keep apart the outer wall of static contact section of thick bamboo (12).
3. Direct acting three position switch (10) according to claim 1, characterized in that the insulating sleeve (13) is connected to the grounding contact base (11) and the isolating stationary contact cylinder (12) without play.
4. The direct-acting three-position switch (10) according to claim 1, wherein the grounding contact holder (11) and the isolating static contact cylinder (12) are provided with a first connecting portion (14) on the outer wall covered by the two connecting portions (132), and the inner sides of the two connecting portions (132) are provided with a second connecting portion (15) which is in fit connection with the first connecting portion (14).
5. A direct acting three position switch (10) as claimed in claim 4 wherein the first connection (14) and the second connection (15) are configured as cooperating projections and recesses.
6. The direct-acting three-position switch (10) according to claim 1, characterized in that the outer diameter of the grounding contact base (11) is greater than the outer diameter of the isolating stationary contact cylinder (12); the outer wall of the connecting section (132) of the two connecting sections (132) connected to the ground contact (11) is smoothly transited to the outer wall of the middle section (131).
7. The direct-acting three-position switch (10) according to claim 1, wherein the intermediate section (131) is provided with heat dissipation holes.
8. Direct acting three position switch (10) according to claim 1, characterized in that the grounding contact (11) is constructed as a flange structure.
9. Gas-insulated switchgear cabinet, characterized in that it comprises a direct-acting three-position switch (10) according to any of claims 1 to 8.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202121565909.3U CN215680507U (en) | 2021-07-09 | 2021-07-09 | Direct-acting three-position switch and gas insulation switch cabinet with same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202121565909.3U CN215680507U (en) | 2021-07-09 | 2021-07-09 | Direct-acting three-position switch and gas insulation switch cabinet with same |
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Publication Number | Publication Date |
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CN215680507U true CN215680507U (en) | 2022-01-28 |
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CN202121565909.3U Active CN215680507U (en) | 2021-07-09 | 2021-07-09 | Direct-acting three-position switch and gas insulation switch cabinet with same |
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CN (1) | CN215680507U (en) |
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2021
- 2021-07-09 CN CN202121565909.3U patent/CN215680507U/en active Active
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