CN112786340B - High-voltage outdoor isolating switch contact - Google Patents
High-voltage outdoor isolating switch contact Download PDFInfo
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- CN112786340B CN112786340B CN202110149498.8A CN202110149498A CN112786340B CN 112786340 B CN112786340 B CN 112786340B CN 202110149498 A CN202110149498 A CN 202110149498A CN 112786340 B CN112786340 B CN 112786340B
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- contact
- soft copper
- fingers
- connecting piece
- finger
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/023—Base and stationary contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/026—Movable parts and contacts mounted thereon
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Abstract
A high-voltage outdoor isolating switch contact comprises a moving contact and a fixed contact. The moving contact comprises a contact, a connecting rod and a moving contact connecting end, wherein the contact is connected to the moving contact connecting end through the connecting rod, the moving contact connecting end is used for being connected with a conductor, the contact can be inserted into a fixed contact, the fixed contact comprises six contact fingers, a spring hole arranged on the contact fingers, three contact finger pressing pieces, a connecting piece, a contact finger fixing hole arranged on the connecting piece and the fixed contact connecting end, the six contact fingers are distributed in a regular hexagon shape, and pass through the spring hole on each two opposite contact fingers and the contact finger fixing hole on the connecting piece respectively through the three contact finger pressing pieces, so that the six contact fingers are fixedly connected with the connecting piece, and the fixed contact connecting end is used for being connected with the conductor. The problem of failure of the isolating switch caused by overheat of the clamping spring can be fundamentally solved, so that the occurrence of heating accidents and large-area power failure accidents of the isolating switch is greatly reduced, and a large amount of manpower and material resources for overhaul and maintenance are saved for the electric power department.
Description
Technical Field
The invention belongs to the technical field of isolating switches, and particularly relates to a high-voltage outdoor isolating switch contact.
Background
The isolating switch is a high-voltage electric appliance for switching on and off a circuit under the condition of no load current, is also called a disconnecting link, and is one type of high-voltage switch equipment, and cannot be used for directly switching on and off the load current because of no arc extinguishing device. Serving to change the circuit connection or isolate the line or device from the power supply. The connection modes of the movable contact and the fixed contact of the isolating knife switch in the current application are a knife switch type, a rotary type and a plug-in type, however, due to unreasonable structure, heating and sparking at the contact often become common phenomena due to poor contact in operation.
The contact is unreasonable in mechanical structure, so that the static contact is loose in long-term operation, and in addition, the outdoor high-voltage isolating switch at present adopts a self-operated spring compression mode, so that the outdoor high-voltage isolating switch is easy to deform and lose elasticity under the condition of long-term overcurrent heating. As the outdoor operation is carried out, the rain causes the corrosion of the spring, and finally the contact resistance of the joint is increased, so that the whole contact part heats and fires.
At present, three kinds of isolating switch moving and static contacts are mainly used at home and abroad, and one scheme adopted earlier is to tension two side contact fingers by two or more springs so that the contact fingers are in close contact with the moving contact. And also compression by means of a tablet. The newer scheme is that arc-shaped spring pieces made of spring steel are adopted to press the contact fingers on two sides of the contact fingers. After a number of practical applications, these solutions have been found to have the following problems: (1) Insulating measures are not taken between the spring and the fixed contact, so that current flows through the spring to heat the spring and lose elasticity, and the fixed contact and the movable contact assembly are in poor contact to strike fire; the spring can be tired when being in a compressed or tightly connected working state for a long time, and the spring can lose elasticity slowly along with the lengthening of the running time, and even can deform, so that poor contact of the contact is caused. (2) Because the bolts of the fixed contact and the moving contact are used for a long time, loosening occurs, so that the contact finger and the moving contact are in poor contact, and overheat is caused in contact with the contact surface. (3) As the number of operations increases or the thickness of the plating becomes uneven, the contact finger plating peels off and copper is exposed, resulting in overheating of the contact. The disconnecting switch is invalid due to heating of the contact, so that a large-area power failure accident is caused, the power failure of the power transmission line generates great economic loss and bad social influence, and a great amount of manpower and material resources are consumed for a great amount of frequent overhauling.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a high-voltage outdoor isolating switch contact.
The invention adopts the following technical scheme. A high voltage outdoor disconnector contact, comprising: a moving contact and a fixed contact; the movable contact comprises a contact, a connecting rod and a movable contact connecting end, wherein the contact is connected to the movable contact connecting end through the connecting rod, the movable contact connecting end is used for being connected with a conductor, the contact can be inserted into the fixed contact, the fixed contact comprises six contact fingers, a spring hole arranged on the contact fingers, three contact finger pressing pieces, a connecting piece, a contact finger fixing hole arranged on the connecting piece and a fixed contact connecting end, the six contact fingers are distributed in a regular hexagon mode, and the three contact finger pressing pieces respectively penetrate through the spring hole on the contact fingers which are opposite to each other in pairs and the contact finger fixing hole on the connecting piece, so that six contact fingers are fixedly connected with the connecting piece, and the fixed contact connecting end is used for being connected with the conductor.
Preferably, the movable contact connecting end is cylindrical or plate-type, and when the movable contact connecting end is plate-type, a screw hole is formed in the plate and is used for being fixed with the conductor through a screw.
Preferably, the fixed contact connecting end is cylindrical or plate-type, and when the fixed contact connecting end is plate-type, a screw hole is formed in the plate and is used for being fixed with the conductor through a screw.
Preferably, the connecting rod and the moving contact connecting end are of an integrated structure.
Preferably, one end of the contact of the moving contact is in an external thread structure and is used for being connected with the connecting rod.
Preferably, the contact finger is a bent alloy body, so that the movable contact is convenient to insert.
Preferably, one end of the connecting piece and the connecting end of the fixed contact are in an integrated structure.
Preferably, the other end of the connecting piece is a hollow hexagonal prism.
Preferably, six contact fingers are mounted on the outer side of the connecting piece through the contact finger pressing piece.
Preferably, the contact finger pressing member is a double-headed screw, each of which has a nut mounted at both ends thereof, and a spring is provided between each nut and the contact finger, respectively, and the spring is fastened to a predetermined elastic limit by the nuts.
Preferably, the static contact further comprises a spring ring, and the spring ring is arranged on the outer side of a hexagon surrounded by six contact fingers and used for enabling the contact fingers to rebound.
Preferably, each contact finger is further provided with a concave screw hole and a running-preventing screw capable of being matched with the concave screw hole, and the running-preventing screw is screwed into the concave screw hole, so that the spring ring is clamped and cannot fall off.
Preferably, the static contact further comprises a soft copper belt, a soft copper belt connecting hole arranged on the contact finger, a soft copper belt fixing hole arranged on the connecting piece and a soft copper belt fixing screw used for fixing the soft copper belt.
Preferably, one end of the soft copper strip is connected to the soft copper strip connecting hole on the contact finger through the soft copper strip fixing screw, and the other end of the soft copper strip is connected to the soft copper strip fixing hole on the connecting piece through the soft copper strip fixing screw.
Preferably, the rain-proof contact further comprises a rain-proof cover, the cover body of the rain-proof cover is in a horn shape, and the rain-proof cover is sleeved on the connecting piece of the static contact through a fixing piece.
The invention has the beneficial effects that compared with the prior art: (1) The contact mode of the outdoor high-voltage isolating switch is changed fundamentally, and the outdoor high-voltage isolating switch becomes a horizontal plug-in type. (2) By utilizing the compression spring ring, the contact finger can be prevented from running, and the compression function is achieved. (3) The contact finger can compress the contact again by using the compressing piece, so that the current passing mode of the isolating switch, the action mode of the disconnecting link and the contact mode are basically changed. (4) In order to prevent the contact finger from being connected with the connecting piece poorly, the flexible copper strip is adopted, the current direction is changed, the effective connection of the movable contact and the fixed contact is ensured, and the problem of disconnecting switch failure caused by overheat of the clamping spring is fundamentally solved, so that the occurrence of disconnecting switch heating accidents and large-area power failure accidents is greatly reduced, a great amount of manpower and material resources for overhauling and maintaining are saved for an electric power department, the urgent needs of domestic electric power operation enterprises are met, meanwhile, the serious economic loss caused by power failure of the power transmission line is avoided, and the power supply reliability is improved. The heating of each connecting part is prevented, and the safe operation of the isolating switch is ensured.
Drawings
FIG. 1 is a schematic diagram of the installation of a high voltage outdoor disconnector contact of the present invention;
fig. 2 is a schematic diagram of two structures of a moving contact of the high-voltage outdoor isolating switch contact of the invention;
FIG. 3 is a schematic view of the structure of the contact fingers of the high voltage outdoor disconnector contact of the present invention;
FIG. 4 is a schematic view of the finger hold-down of the high voltage outdoor disconnector contact of the present invention;
FIG. 5 is a schematic view of the structure of the anti-run screw and soft copper strap set screw of the high voltage outdoor disconnector contact of the present invention;
FIG. 6 is a schematic view of the spring ring of the high voltage outdoor disconnector contact of the present invention;
FIG. 7 is a schematic view of the structure of the soft copper strip of the high voltage outdoor disconnector contact of the present invention;
fig. 8 is a schematic diagram of two structures of a connecting piece of a high-voltage outdoor isolating switch contact and a connecting end of a fixed contact.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present invention and are not intended to limit the scope of protection of the present application.
Fig. 1 is an installation schematic diagram of a high-voltage outdoor isolating switch contact according to the present invention, and as shown in fig. 1, the high-voltage outdoor isolating switch contact according to the present invention mainly includes a moving contact and a fixed contact.
As shown in fig. 2, the moving contact includes a contact 101, a connecting rod 102, and a moving contact connecting end 103. The contact 101 is connected to the moving contact connection end 103 through a connection rod 102. The connecting rod 102 and the movable contact connecting end 103 are of an integrated structure, and one end of the movable contact 101 is of an external thread structure and is used for being connected with the connecting rod 102. The moving contact connecting end 103 is used for being connected with the electric conductor, the moving contact connecting end 103 can be in a cylinder shape or a plate shape, and when the moving contact connecting end 103 is in the plate shape, a screw hole is formed in the plate and is used for being fixed with the electric conductor through a screw. The moving contact is inserted into the fixed contact through the contact 101 so that the moving contact is connected with the fixed contact.
As shown in fig. 3, 4 and 8, the stationary contact includes six contact fingers 201, a snap hole 20102 provided on the contact fingers 201, three contact finger pressing members 202, a connecting member 208, a contact finger fixing hole 205 provided on the connecting member 208, and a stationary contact connection end 210. Six contact fingers 201 are distributed in a regular hexagon, and three contact finger pressing pieces 202 respectively pass through the spring pressing holes 20102 on the contact fingers 201 and the contact finger fixing holes 205 on the connecting pieces 208 which are opposite to each other, so that the six contact fingers 201 are fixedly connected with the connecting pieces 208. The fixed contact connection end 210 of the connection piece 208 is used for connecting with an electrical conductor, the fixed contact connection end 210 can be in a cylindrical shape or a plate shape, and when the fixed contact connection end 210 is in a plate shape, a screw hole is formed in the plate and is used for being fixed with the electrical conductor through a screw.
As shown in fig. 3, the contact finger 201 is a curved alloy body, which facilitates the insertion of the moving contact. As shown in fig. 8, one end of the connecting member 208 and the fixed contact connecting end 210 are in an integral structure, and the other end of the connecting member 208 is a hollow hexagonal prism.
Six contact fingers 201 are mounted on the outer side of the connection member 208 by contact finger pressing members 202, as shown in fig. 4, the contact finger pressing members 202 are double-headed screws, and nuts are respectively mounted on both ends thereof, as shown in fig. 8, between each nut and the contact finger 201, springs are respectively provided, and the springs are fastened to a predetermined elastic limit by the nuts.
As shown in fig. 6, the static contact further includes a spring ring 203, where the spring ring 203 is disposed on the outer side of the hexagon surrounded by the six contact fingers 201, so as to make the contact fingers 201 rebound. As shown in fig. 3 and 5, a concave screw hole 20101 and a run-out preventing screw 204 capable of being matched with the concave screw hole 20101 are further provided at a corresponding position of each contact finger 201, and the run-out preventing screw 204 is screwed into the concave screw hole 20101, so that the spring ring 203 is clamped and cannot fall off.
As shown in fig. 3, 5, 7 and 8, the static contact further includes a soft copper strip 206, a soft copper strip connection hole 20103 provided on the contact finger 201, a soft copper strip fixing hole 209 provided on the connection member 208, and a soft copper strip fixing screw 207 for fixing the soft copper strip 206, wherein one end of the soft copper strip 206 is connected to the soft copper strip connection hole 20103 on the contact finger 201 through the soft copper strip fixing screw 207, and the other end of the soft copper strip 206 is connected to the soft copper strip fixing hole 209 on the connection member 208 through the soft copper strip fixing screw 207. The soft copper strips 206 can effectively prevent the situation that the contact finger 201 is not well connected with the connecting piece 208 to influence conduction, and ensure the effective connection of the moving contact and the fixed contact.
The high-voltage outdoor isolating switch contact also comprises the rain shield, the shield body of the rain shield is horn-shaped, and the rain shield is sleeved on the connecting piece 208 of the fixed contact through the fixing piece, so that rainwater can be effectively prevented from entering the isolating switch contact in a rainy day.
When the isolating switch is operated, under the action of the rotating mechanism, the moving and static contacts of each phase are driven to horizontally act, and the three-phase moving contact can be inserted into or pulled out of the static contact between each phase under the action of the pull rod (original), so that the purpose of effectively and synchronously opening and closing the three phases is achieved.
The invention has the beneficial effects that compared with the prior art: (1) The contact mode of the outdoor high-voltage isolating switch is changed fundamentally, and the outdoor high-voltage isolating switch becomes a horizontal plug-in type. (2) By utilizing the compression spring ring, the contact finger can be prevented from running, and the compression function is achieved. (3) The contact finger can compress the contact again by using the compressing piece, so that the current passing mode of the isolating switch, the action mode of the disconnecting link and the contact mode are basically changed. (4) In order to prevent the contact finger from being connected with the connecting piece poorly, the flexible copper strip is adopted, the current direction is changed, the effective connection of the movable contact and the fixed contact is ensured, and the problem of disconnecting switch failure caused by overheat of the clamping spring is fundamentally solved, so that the occurrence of disconnecting switch heating accidents and large-area power failure accidents is greatly reduced, a great amount of manpower and material resources for overhauling and maintaining are saved for an electric power department, the urgent needs of domestic electric power operation enterprises are met, meanwhile, the serious economic loss caused by power failure of the power transmission line is avoided, and the power supply reliability is improved. The heating of each connecting part is prevented, and the safe operation of the isolating switch is ensured.
While the applicant has described and illustrated the embodiments of the present invention in detail with reference to the drawings, it should be understood by those skilled in the art that the above embodiments are only preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not to limit the scope of the present invention, but any improvements or modifications based on the spirit of the present invention should fall within the scope of the present invention.
Claims (10)
1. A high voltage outdoor disconnector contact, comprising: moving contact and stationary contact, its characterized in that:
the movable contact comprises a contact (101), a connecting rod (102) and a movable contact connecting end (103),
the contact (101) is connected to the movable contact connecting end (103) through the connecting rod (102),
the movable contact connecting end (103) is used for being connected with an electric conductor,
the contact (101) can be inserted into the stationary contact,
the static contact comprises six contact fingers (201), a spring hole (20102) arranged on the contact fingers (201), three contact finger pressing pieces (202), a connecting piece (208), a contact finger fixing hole (205) arranged on the connecting piece (208) and a static contact connecting end (210),
six contact fingers (201) are distributed in a regular hexagon, three contact finger pressing pieces (202) respectively penetrate through the spring pressing holes (20102) on the contact fingers (201) which are opposite to each other and the contact finger fixing holes (205) on the connecting piece (208) to enable the six contact fingers (201) to be fixedly connected with the connecting piece (208),
wherein springs fastened to a preset elastic limit are arranged between the six contact fingers (201) and nuts on the three contact finger pressing pieces (202);
moreover, a concave screw hole (20101) is further formed in each contact finger (201) above the spring hole (20102), and is used for arranging a running-proof screw (204) to clamp a spring ring (203);
a soft copper strip connecting hole (20103) is further formed below the spring hole (20102) on each contact finger (201) and used for fixing the soft copper strips (206) so as to ensure effective conduction between the contact finger (201) and the connecting piece (208);
the static contact connecting end (210) is used for being connected with an electric conductor.
2. The high voltage outdoor disconnector contact according to claim 1, characterized in that:
the movable contact connecting end (103) is of a cylinder type or a plate type, and when the movable contact connecting end (103) is of a plate type, a screw hole is formed in the plate and is used for being fixed with the conductor through a screw;
the fixed contact connecting end (210) is of a cylinder type or a plate type, and when the fixed contact connecting end (210) is of a plate type, a screw hole is formed in the plate and is used for being fixed with the conductor through a screw.
3. The high voltage outdoor disconnector contact according to claim 1, characterized in that:
the connecting rod (102) and the movable contact connecting end (103) are of an integrated structure,
one end of the contact (101) of the moving contact is of an external thread structure and is used for being connected with the connecting rod (102).
4. A high voltage outdoor disconnector contact according to any one of claims 1 to 3, characterized in that:
the contact finger (201) is a bent alloy body, so that the movable contact is convenient to insert.
5. A high voltage outdoor disconnector contact according to any one of claims 1 to 3, characterized in that:
one end of the connecting piece (208) and the connecting end (210) of the fixed contact are in an integrated structure,
the other end of the connecting piece (208) is a hollow hexagonal prism.
6. A high voltage outdoor disconnector contact according to any one of claims 1 to 3, characterized in that:
six contact fingers (201) are arranged on the outer side of the connecting piece (208) through the contact finger pressing piece (202),
the contact finger pressing members (202) are double-headed screws, each of which has a nut mounted at both ends thereof, and springs are respectively provided between each nut and the contact finger (201), and the springs are fastened to a predetermined elastic limit by the nuts.
7. A high voltage outdoor disconnector contact according to any one of claims 1 to 3, characterized in that:
the static contact further comprises a spring ring (203), wherein the spring ring (203) is arranged on the outer side of a hexagon surrounded by six contact fingers (201) and used for enabling the contact fingers (201) to rebound.
8. The high voltage outdoor disconnector contact according to claim 5, characterized in that:
each contact finger (201) is further provided with a concave screw hole (20101) and a running-preventing screw (204) which can be matched with the concave screw hole (20101), and the running-preventing screw (204) is screwed into the concave screw hole (20101), so that the spring ring (203) is clamped and cannot fall off.
9. A high voltage outdoor disconnector contact according to any one of claims 1 to 3, characterized in that:
the static contact further comprises a soft copper belt (206), a soft copper belt connecting hole (20103) arranged on the contact finger (201), a soft copper belt fixing hole (209) arranged on the connecting piece (208) and a soft copper belt fixing screw (207) for fixing the soft copper belt (206),
one end of the soft copper strap (206) is connected to the soft copper strap connecting hole (20103) on the contact finger (201) through the soft copper strap fixing screw (207), and the other end of the soft copper strap (206) is connected to the soft copper strap fixing hole (209) on the connecting piece (208) through the soft copper strap fixing screw (207).
10. A high voltage outdoor disconnector contact according to any one of claims 1 to 3, characterized in that:
the rain-proof contact is characterized by further comprising a rain-proof cover, wherein the cover body of the rain-proof cover is in a horn shape, and the rain-proof cover is sleeved on the connecting piece (208) of the static contact through a fixing piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110149498.8A CN112786340B (en) | 2021-02-03 | 2021-02-03 | High-voltage outdoor isolating switch contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110149498.8A CN112786340B (en) | 2021-02-03 | 2021-02-03 | High-voltage outdoor isolating switch contact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112786340A CN112786340A (en) | 2021-05-11 |
| CN112786340B true CN112786340B (en) | 2023-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110149498.8A Active CN112786340B (en) | 2021-02-03 | 2021-02-03 | High-voltage outdoor isolating switch contact |
Country Status (1)
| Country | Link |
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| CN (1) | CN112786340B (en) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0139790A1 (en) * | 1983-11-01 | 1985-05-08 | Agfa-Gevaert N.V. | Sheet dispenser |
| DE10224450C1 (en) * | 2002-05-29 | 2003-12-11 | Elpro Bahnstromanlagen Gmbh | Disconnector for electrical isolation of busbars with contact cleaning |
| CN2893899Y (en) * | 2006-01-23 | 2007-04-25 | 阎淼江 | Highvoltage isolated switch contact assembly |
| CN201138633Y (en) * | 2007-12-10 | 2008-10-22 | 河南森源电气股份有限公司 | Contact cooperating construction for contact finger and contact terminal of isolation switch |
| CN201256103Y (en) * | 2008-08-11 | 2009-06-10 | 瓦房店高压开关有限公司 | External pressing contact tip mechanism |
| CN201812726U (en) * | 2010-09-03 | 2011-04-27 | 耿万军 | Electrical contact for outdoor high-voltage alternating-current disconnector |
| DE102011118894B3 (en) * | 2011-11-18 | 2013-01-31 | Schaltbau Gmbh | High current switch |
| CN202339844U (en) * | 2011-12-07 | 2012-07-18 | 川铁电气（天津）集团有限公司 | Grounding static contact of isolating switch |
| CN103996987B (en) * | 2014-05-16 | 2016-05-11 | 上海拓及轨道交通设备有限公司 | Connector of the large electric current of handcart of direct-current circuit breaker |
| CN208673966U (en) * | 2018-07-20 | 2019-03-29 | 闫淼江 | Negative contact, matched yang contacts and fracture component |
| CN111341591A (en) * | 2018-12-18 | 2020-06-26 | 恒特电气有限公司 | Isolating switch contact assembly |
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2021
- 2021-02-03 CN CN202110149498.8A patent/CN112786340B/en active Active
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| CN112786340A (en) | 2021-05-11 |
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