CN112349521A - Circuit breaker and resistor fracture contact thereof - Google Patents
Circuit breaker and resistor fracture contact thereof Download PDFInfo
- Publication number
- CN112349521A CN112349521A CN201910735981.7A CN201910735981A CN112349521A CN 112349521 A CN112349521 A CN 112349521A CN 201910735981 A CN201910735981 A CN 201910735981A CN 112349521 A CN112349521 A CN 112349521A
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- CN
- China
- Prior art keywords
- contact
- main body
- rod
- contact rod
- contact main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/64—Protective enclosures, baffle plates, or screens for contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/60—Auxiliary means structurally associated with the switch for cleaning or lubricating contact-making surfaces
Abstract
The invention relates to a circuit breaker and a resistor fracture contact thereof. The resistor fracture contact comprises a contact main body and a contact rod connected to the rear side of the contact main body; the contact main body is used for being in opposite compression joint with the adaptive contact of the circuit breaker and is provided with a contact shielding cover; one of the rear end of the contact main body and the front end of the contact rod is provided with a threaded hole, the other one of the rear end of the contact main body and the front end of the contact rod is provided with an adaptive external thread, and the contact main body and the contact rod are in threaded connection through the threaded hole and the external thread; an elastic washer or a disc spring is arranged between the contact main body and the contact rod in the axial direction of the contact rod and is used for preventing the threaded connection between the contact main body and the contact rod from loosening. The contact main body is in threaded connection with the contact rod, the threaded fit between the contact main body and the contact rod is relieved, foreign matters in the shielding cover can be cleaned, an elastic gasket or a disc spring is arranged between the contact main body and the contact rod in the axial direction of the contact rod, and the threaded connection between the contact main body and the contact rod can be prevented from loosening when the resistor fracture contact is used.
Description
Technical Field
The invention relates to a circuit breaker and a resistor fracture contact thereof.
Background
High voltage circuit breaker is important electrical equipment among the power system, and in high voltage circuit breaker closing operation process, can produce the overvoltage on the power transmission line, the harm of overvoltage lies in: the electrical equipment on the transmission line is easily damaged, and the stable operation of the power system is influenced. In order to limit and eliminate the overvoltage on the transmission line, a closing resistor is usually connected in parallel in a main loop, and a resistor break connected in series with the closing resistor is arranged to control the connection and disconnection of the closing resistor and the power system. Before the main fracture is switched on, the resistor fracture is switched on first, overvoltage is consumed on a switching-on resistor, and when the main fracture is switched on, the voltages at two ends of the main fracture are normal.
The structure of the breaker is disclosed in Chinese invention patent with application publication number CN106024505A and application publication date 2016, 10, 12. The resistor fracture comprises a resistor fracture contact, the resistor fracture contact comprises a dynamic resistor contact and a static resistor contact, and the structures of the dynamic resistor contact and the static resistor contact are as a resistor moving contact and a resistor static contact disclosed in Chinese invention patent application with the application publication number of CN109119282A and the application publication date of 2019, 01.01.9.
However, a shield case is required to be provided outside the contact, and foreign matter is likely to fall into the shield case, which affects the insulation performance, and therefore, cleaning is required. And shield cover and contact among the prior art generally are integrative to be set up on quiet end guide bar or move end contact pole, consequently are difficult to realize the clearance to the interior foreign matter of shield cover.
Disclosure of Invention
The invention aims to provide a resistor fracture contact which is used for solving the problem that the existing circuit breaker is difficult to clean foreign matters in a shielding case. Another object of the present invention is to provide a circuit breaker, which is used to solve the problem that the existing circuit breaker is difficult to clean the foreign matters in the shielding case.
In order to achieve the purpose, the technical scheme of the resistor fracture contact is as follows: the resistor fracture contact comprises a contact main body and a contact rod connected to the rear side of the contact main body;
the contact main body is used for being in opposite compression joint with the adaptive contact of the circuit breaker and is provided with a contact shielding cover;
one of the rear end of the contact main body and the front end of the contact rod is provided with a threaded hole, the other one of the rear end of the contact main body and the front end of the contact rod is provided with an adaptive external thread, and the contact main body and the contact rod are in threaded connection through the threaded hole and the external thread;
an elastic washer or a disc spring is arranged between the contact main body and the contact rod in the axial direction of the contact rod and is used for preventing the threaded connection between the contact main body and the contact rod from loosening.
The resistor fracture contact has the beneficial effects that: the contact main body is in threaded connection with the contact rod, when foreign matters in the shielding case need to be cleaned, the threaded fit between the contact main body and the contact rod is removed, the foreign matters in the shielding case can be cleaned, an elastic gasket or a disc spring sheet is arranged between the contact main body and the contact rod in the axial direction of the contact rod, and the threaded connection between the contact main body and the contact rod can be prevented from loosening when the resistance fracture contact is used.
Furthermore, a counter bore is formed in the end face of one of the contact main body and the contact rod, the threaded hole is formed in the bottom wall of the counter bore, a counter bore section used for being embedded into the counter bore is formed in the other one of the contact main body and the contact rod, and the elastic washer or the disc spring sheet is sleeved on the counter bore section.
The contact rod has the beneficial effect of being beneficial to the connection reliability between the contact body and the contact rod.
Further, the screw hole sets up on the contact pole, the external screw thread sets up in the contact main part, is equipped with the screw hole in the contact main part, is equipped with holding screw in the screw hole, and holding screw's front end supports the cooperation with the hole edge top of screw hole.
The contact has the advantages that the contact body and the contact rod are prevented from rotating relatively by means of acting force between the front end of the set screw and the contact rod, and connection reliability between the contact body and the contact rod is facilitated.
Further, a tool hole is formed in the front end face of the contact main body and used for being matched with a pulling and screwing tool.
It has the advantage of facilitating the mounting of the contact body onto the contact stem.
Furthermore, the contact main body is provided with a backward annular end face, the shielding cover is provided with a connecting folding edge which is matched with the annular end face in an attaching mode, the connecting folding edge is welded with the annular end face, and the dish spring piece is arranged between the connecting folding edge and the movable contact rod.
The contact has the beneficial effects that the annular end face is attached to the connecting folding edge, so that the connecting strength of the shielding cover and the contact main body is ensured.
The technical scheme of the circuit breaker is as follows: the circuit breaker comprises a main fracture and a resistor fracture, the resistor fracture comprises a movable end resistor contact and a static end resistor contact, and at least one of the movable end resistor contact and the static end resistor contact comprises a contact main body and a contact rod connected to the rear side of the contact main body;
the contact main body is used for being in opposite compression joint with the adaptive contact of the circuit breaker and is provided with a contact shielding cover;
one of the rear end of the contact main body and the front end of the contact rod is provided with a threaded hole, the other one of the rear end of the contact main body and the front end of the contact rod is provided with an adaptive external thread, and the contact main body and the contact rod are in threaded connection through the threaded hole and the external thread;
an elastic washer or a disc spring is arranged between the contact main body and the contact rod in the axial direction of the contact rod and is used for preventing the threaded connection between the contact main body and the contact rod from loosening.
The circuit breaker has the beneficial effects that: the contact main body is in threaded connection with the contact rod, when foreign matters in the shielding case need to be cleaned, the threaded fit between the contact main body and the contact rod is removed, the foreign matters in the shielding case can be cleaned, an elastic gasket or a disc spring sheet is arranged between the contact main body and the contact rod in the axial direction of the contact rod, and the threaded connection between the contact main body and the contact rod can be prevented from loosening when the resistance fracture contact is used.
Furthermore, a counter bore is formed in the end face of one of the contact main body and the contact rod, the threaded hole is formed in the bottom wall of the counter bore, a counter bore section used for being embedded into the counter bore is formed in the other one of the contact main body and the contact rod, and the elastic washer or the disc spring sheet is sleeved on the counter bore section.
The contact rod has the beneficial effect of being beneficial to the connection reliability between the contact body and the contact rod.
Further, the screw hole sets up on the contact pole, the external screw thread sets up in the contact main part, is equipped with the screw hole in the contact main part, is equipped with holding screw in the screw hole, and holding screw's front end supports the cooperation with the hole edge top of screw hole.
The contact has the advantages that the contact body and the contact rod are prevented from rotating relatively by means of acting force between the front end of the set screw and the contact rod, and connection reliability between the contact body and the contact rod is facilitated.
Further, a tool hole is formed in the front end face of the contact main body and used for being matched with a pulling and screwing tool.
It has the advantage of facilitating the mounting of the contact body onto the contact stem.
Furthermore, the contact main body is provided with a backward annular end face, the shielding cover is provided with a connecting folding edge which is matched with the annular end face in an attaching mode, the connecting folding edge is welded with the annular end face, and the dish spring piece is arranged between the connecting folding edge and the movable contact rod.
The contact has the beneficial effects that the annular end face is attached to the connecting folding edge, so that the connecting strength of the shielding cover and the contact main body is ensured.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a circuit breaker of the present invention;
fig. 2 is a schematic structural diagram of a resistor break in a closing state according to an embodiment of the circuit breaker of the present invention;
fig. 3 is a schematic structural view of a resistor break in an open state according to an embodiment of the circuit breaker of the present invention;
fig. 4 is a schematic view of a portion of a movable contact in an embodiment of the circuit breaker of the present invention;
FIG. 5 is a left side view of FIG. 4;
in the figure: 1. the static contact comprises a static contact support part, 2, a static contact, 3, a contact main body, 31, a counter bore section, 32, an external thread section, 4, a shielding cover, 41, a connecting folding edge, 5, a contact rod, 51, a counter bore, 52, a threaded hole, 6, a guide support part, 7, a disc reed, 8, a set screw, 9, a tool hole, 10, a resistor fracture, 11, a main fracture, 12 and a transmission part.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
In a specific embodiment of the circuit breaker of the present invention, as shown in fig. 1, the circuit breaker includes a main break 11, a resistor break 10, and a transmission portion 12, where the main break 11 and the resistor break 10 implement a switching operation through the transmission portion 12. As shown in fig. 2 and fig. 3, the resistor break 10 includes a moving contact and a static contact 2, taking the moving contact as an example, the moving contact includes a contact main body 3 for being in press-fit with the static contact 2 in an opposite direction, a contact rod 5 connected to the rear side of the contact main body 3, and a shielding cover 4 disposed on the contact main body 3, and the specific connection mode between the shielding cover 4 and the contact main body 3 is as follows: as shown in fig. 4, the contact body 3 has a rearward annular end surface, the shield case 4 has a connection flange 41 which is fitted to the annular end surface, and the connection flange 41 is welded to the annular end surface. The specific connection form of the contact body 3 and the contact rod 5 is as follows: the end face of the front end of the contact rod 5 is provided with a counter bore 51, the bottom wall of the counter bore 51 is provided with a threaded hole 52, the rear end of the contact body 3 is provided with a counter bore section 31 embedded into the counter bore 51, the axial end face of the counter bore section 31 is connected with an external threaded section 32 matched with the threaded hole 52, and the contact body 3 and the contact rod 5 are detachably connected through the matching of the threaded hole 52 and the external threaded section 32. The contact rod 5 is arranged on a guide support 6 in a guide-movable manner, the guide support 6 guiding the contact rod 5 in the direction of movement of the contact body 3.
A disc spring 7 is arranged between the connecting folding edge 41 and the contact rod 5 along the axial direction of the contact rod 5, the disc spring 7 is sleeved on the counter bore section 31, and the disc spring 7 can increase the friction force between the threaded hole 52 and the external threaded section 32 so as to prevent the threaded connection between the contact body 3 and the contact rod 5 from loosening. Be equipped with holding screw 8 on counter bore section 31, the tail end of holding screw 8 supports the cooperation with the front end top of contact pole 5, relies on the effort between 8 tail ends of holding screw and the contact pole 5, prevents to produce relative rotation between contact main part 3 and the contact pole 5, does benefit to the connection reliability between contact main part 3 and the contact pole 5.
As shown in fig. 5, three tool holes 9 for engaging with a wrenching tool are axially formed in the contact body 3, and the three tool holes 9 are located on the circumference of the same circle.
The structure of the static contact 2 of the resistor fracture 10 is similar to that of the moving contact, and the difference is that the static contact 2 is movably arranged on the static contact support 1 in a guiding manner through a spring to meet the working requirement of the resistor fracture 10, and the specific connection structure between the static contact 2 and the static contact support 1 is the prior art and is not described herein again.
In other embodiments, the contact body and the contact rod may be connected by a screw thread and are prevented from loosening by the disc spring only on one of the moving contact and the fixed contact.
In other embodiments, the contact may be provided with a counterbore and a threaded bore in the contact body and a counterbore section and an external threaded section in the contact stem.
In other embodiments, the counter bore may not be provided on the contact rod, and correspondingly, the counter bore section may not be provided on the contact body, and at this time, the disc spring may be sleeved on the external thread section.
In this embodiment, the disc spring 7 is disposed between the contact body 3 and the contact rod 5 to prevent the screw connection between the contact body 3 and the contact rod 5 from being loosened, and in other embodiments, other methods, for example, a resilient washer is disposed between the contact body and the contact rod.
In other embodiments, the set screw may not be provided, and the elastic force of the disc spring plate is used to prevent the threaded connection between the contact body and the contact rod from loosening.
In other embodiments, instead of providing tooling holes in the contact body, a wrenching surface may be provided on the contact body for engagement with a wrenching tool.
In other embodiments, the shielding cover may be welded to the outer peripheral surface of the contact main body, and at this time, both ends of the disc spring may be respectively engaged with the contact main body and the contact rod.
The structure of the embodiment of the contact for a resistor break of the present invention is the same as the structure of the contact for a resistor break of the embodiment of the circuit breaker of the present invention, and is not described again.
Claims (10)
1. Resistance fracture contact, its characterized in that: comprises a contact body and a contact rod connected with the rear side of the contact body;
the contact main body is used for being in opposite compression joint with the adaptive contact of the circuit breaker and is provided with a contact shielding cover;
one of the rear end of the contact main body and the front end of the contact rod is provided with a threaded hole, the other one of the rear end of the contact main body and the front end of the contact rod is provided with an adaptive external thread, and the contact main body and the contact rod are in threaded connection through the threaded hole and the external thread;
an elastic washer or a disc spring is arranged between the contact main body and the contact rod in the axial direction of the contact rod and is used for preventing the threaded connection between the contact main body and the contact rod from loosening.
2. The rupture contact of claim 1, wherein: the end face of one of the contact main body and the contact rod is provided with a counter bore, the threaded hole is formed in the bottom wall of the counter bore, the other one of the contact main body and the contact rod is provided with a counter bore section used for being embedded into the counter bore, and the elastic washer or the disc spring sheet is sleeved on the counter bore section.
3. The rupture contact of claim 1, wherein: the screw hole sets up on the contact pole, the external screw thread sets up in the contact main part, is equipped with the screw hole in the contact main part, is equipped with holding screw in the screw hole, and the front end of holding screw is supported the cooperation with the hole edge of screw hole.
4. The rupture contact as claimed in claim 1 or 2 or 3, wherein: the front end face of the contact main body is provided with a tooling hole, and the tooling hole is used for being matched with a wrenching tool.
5. The rupture contact as claimed in claim 1 or 2 or 3, wherein: the contact main body is provided with a backward annular end face, the shielding cover is provided with a connecting folding edge which is matched with the annular end face in an attaching mode, the connecting folding edge is welded with the annular end face, and the dish spring piece is arranged between the connecting folding edge and the movable contact rod.
6. The circuit breaker, including main fracture and resistance fracture, the resistance fracture is including moving end resistance contact and quiet end resistance contact, its characterized in that: at least one of the movable end resistance contact and the static end resistance contact comprises a contact main body and a contact rod connected to the rear side of the contact main body;
the contact main body is used for being in opposite compression joint with the adaptive contact of the circuit breaker and is provided with a contact shielding cover;
one of the rear end of the contact main body and the front end of the contact rod is provided with a threaded hole, the other one of the rear end of the contact main body and the front end of the contact rod is provided with an adaptive external thread, and the contact main body and the contact rod are in threaded connection through the threaded hole and the external thread;
an elastic washer or a disc spring is arranged between the contact main body and the contact rod in the axial direction of the contact rod and is used for preventing the threaded connection between the contact main body and the contact rod from loosening.
7. The circuit breaker of claim 6, wherein: the end face of one of the contact main body and the contact rod is provided with a counter bore, the threaded hole is formed in the bottom wall of the counter bore, the other one of the contact main body and the contact rod is provided with a counter bore section used for being embedded into the counter bore, and the elastic washer or the disc spring sheet is sleeved on the counter bore section.
8. The circuit breaker of claim 6, wherein: the screw hole sets up on the contact pole, the external screw thread sets up in the contact main part, is equipped with the screw hole in the contact main part, is equipped with holding screw in the screw hole, and the front end of holding screw is supported the cooperation with the hole edge of screw hole.
9. The circuit breaker of claim 6 or 7 or 8, wherein: the front end face of the contact main body is provided with a tooling hole, and the tooling hole is used for being matched with a wrenching tool.
10. The circuit breaker of claim 6 or 7 or 8, wherein: the contact main body is provided with a backward annular end face, the shielding cover is provided with a connecting folding edge which is matched with the annular end face in an attaching mode, the connecting folding edge is welded with the annular end face, and the dish spring piece is arranged between the connecting folding edge and the movable contact rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735981.7A CN112349521A (en) | 2019-08-09 | 2019-08-09 | Circuit breaker and resistor fracture contact thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735981.7A CN112349521A (en) | 2019-08-09 | 2019-08-09 | Circuit breaker and resistor fracture contact thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112349521A true CN112349521A (en) | 2021-02-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910735981.7A Pending CN112349521A (en) | 2019-08-09 | 2019-08-09 | Circuit breaker and resistor fracture contact thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112349521A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021129369A1 (en) * | 2019-12-24 | 2021-07-01 | 河南平芝高压开关有限公司 | Circuit breaker and resistor break transmission structure thereof |
| CN113921298A (en) * | 2021-09-03 | 2022-01-11 | 平高集团有限公司 | Resistance contact and circuit breaker using same |
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| CN203481159U (en) * | 2013-09-30 | 2014-03-12 | 国家电网公司 | High-voltage circuit breaker and active end assembly thereof |
| CN103683083A (en) * | 2013-12-23 | 2014-03-26 | 昆明理工大学 | Isolated earth switch |
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| CN104143484A (en) * | 2014-07-08 | 2014-11-12 | 国家电网公司 | Shielding case for breaker and breaker with shielding case |
| CN203966946U (en) * | 2014-07-02 | 2014-11-26 | 新东北电气集团高压开关有限公司 | The switching-on resistance contact apparatus of extra-high-speed pressure zone switching-on resistance circuit breaker |
| CN109119282A (en) * | 2017-06-22 | 2019-01-01 | 河南平芝高压开关有限公司 | Contact buffer device for collision and the sulfur hexafluoride breaker for using the device |
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| CN2512100Y (en) * | 2001-12-25 | 2002-09-18 | 北京北开电气股份有限公司 | Anti-burn movable contact assembly for SF6 circuit breaker |
| KR101231764B1 (en) * | 2012-03-22 | 2013-02-08 | 현대중공업 주식회사 | Gas insulated switchgear |
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| CN203552958U (en) * | 2013-11-14 | 2014-04-16 | 河南平高东芝高压开关有限公司 | Large-current isolation switch structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021129369A1 (en) * | 2019-12-24 | 2021-07-01 | 河南平芝高压开关有限公司 | Circuit breaker and resistor break transmission structure thereof |
| CN113921298A (en) * | 2021-09-03 | 2022-01-11 | 平高集团有限公司 | Resistance contact and circuit breaker using same |
| CN113921298B (en) * | 2021-09-03 | 2023-09-29 | 平高集团有限公司 | Resistor contact and breaker using same |
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