CN112349532B - Knife switch - Google Patents
Knife switch Download PDFInfo
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- CN112349532B CN112349532B CN202011149171.2A CN202011149171A CN112349532B CN 112349532 B CN112349532 B CN 112349532B CN 202011149171 A CN202011149171 A CN 202011149171A CN 112349532 B CN112349532 B CN 112349532B
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- Prior art keywords
- static contact
- contact
- operating rod
- static
- base
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/54—Lever switches with blade-type contact co-operating with one or two spring-clip contacts, e.g. knife switch
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- Push-Button Switches (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention belongs to the technical field of power equipment, and discloses a disconnecting link, which comprises: the static contact disconnecting link comprises a static contact base, a static contact operating rod and a static contact, the static contact operating rod is in transmission connection with the static contact, the static contact operating rod can drive the static contact to rotate from a first position to a second position, and the static contact operating rod abuts against the static contact base at the lower end point of the travel of the static contact operating rod; the moving contact disconnecting link comprises a moving contact base, a moving contact operating rod and a moving contact, one end of the moving contact operating rod is hinged to the moving contact base and is always subjected to elastic force for preventing the moving contact operating rod from being pressed downwards, and the moving contact is arranged at the other end of the moving contact operating rod; the static contact is towards the moving contact base when the first position, and when the moving contact action bars are pressed down to the lowest position, the moving contact is clamped with the static contact. When the switch is switched on, the moving contact and the static contact are mutually clamped and stably connected.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to a disconnecting link.
Background
At present, an isolation disconnecting link is mainly installed on a low-voltage line switch and a transformer rack in a distribution network so as to enable an electrified body and maintenance equipment to have an obvious disconnection point when power failure maintenance is carried out. The main structural principle of the existing high-voltage isolation disconnecting link is that a loop is conducted in a mode that two copper strips of a moving contact of the disconnecting link are additionally provided with spring pressure to clamp a static contact of the disconnecting link.
1. When the pressure of the knife switch spring is adjusted to be too tight, the knife switch is easy to be closed; loose adjustment, easy generation of heating defect due to poor contact;
2. in the daily power-on and power-off operation process, workers need to open and close the isolation switch, and the isolation switch is frequently operated, so that the elasticity of a switch spring mechanism is gradually reduced, and the contact between a moving contact of the switch and a static contact of the switch is widened to generate heat;
3. the defect that a moving contact of the disconnecting link is deformed easily because the standing angle of a person and the disconnecting link are not on the same horizontal line during operation is influenced by the topographic environment where equipment is installed;
4. influenced by personnel's self operating skill, probably not in place because of the dynamics is not enough when closing a floodgate and leave the potential safety hazard, operating personnel judge the distance of pulling open by mistake after the switch pull open and cause the not enough safety distance between the sound contact and the stationary contact to threaten constructor personal safety.
Disclosure of Invention
The invention aims to provide a disconnecting link to solve the problem of poor contact.
In order to achieve the purpose, the invention adopts the following technical scheme:
a knife switch, comprising:
the static contact disconnecting link comprises a static contact base, a static contact operating rod and a static contact, wherein one end of the static contact operating rod is arranged outside the static contact base, the other end of the static contact operating rod is arranged inside the static contact base and is in transmission connection with the static contact, the static contact operating rod can drive the static contact to rotate from a first position to a second position by rotating from an upper end point of the stroke of the static contact operating rod to a lower terminal, and the static contact operating rod abuts against the static contact base at the lower end point of the stroke of the static contact operating rod; and
the moving contact disconnecting link comprises a moving contact base, a moving contact operating rod and a moving contact, wherein the moving contact base is arranged on one side of the static contact base, one end of the moving contact operating rod is hinged to the moving contact base and is always subjected to elastic force for preventing the moving contact operating rod from being pressed downwards, and the moving contact is arranged at the other end of the moving contact operating rod;
when the moving contact operating rod is pressed down to the lowest position, the moving contact is clamped with the static contact.
As a preferred embodiment of the above disconnecting link, the static contact disconnecting link further includes:
the fixed part is arranged in the fixed contact base, and the middle part of the fixed contact operating rod is rotatably connected to the fixed part; and
the two ends of the moving part are respectively and rotatably connected to the fixing part and the static contact.
As the preferred scheme of above-mentioned switch, the inside of static contact base is equipped with the connecting plate, be equipped with the arc hole on the connecting plate:
the bottom of the static contact is rotatably connected to the connecting plate, an inserting rod is arranged in the middle of the static contact, and the inserting rod is slidably arranged in the arc-shaped hole.
As a preferable scheme of the disconnecting link, the fixed contact includes:
the first end of the static contact connecting frame is connected to the connecting plate; and
the static contact body is connected to the second end of the static contact connecting frame, the static contact body is in a truncated cone shape, and the diameter of the static contact body is gradually reduced from one end close to the static contact connecting frame to the other end.
As a preferred embodiment of the disconnecting link, two ends of one side of the static contact connecting frame, which is away from the static contact body, are respectively provided with a connecting portion, one of the connecting portions is connected to the connecting plate through a first pin, and the other connecting portion is connected to the moving member through a second pin.
As a preferred scheme of the disconnecting link, a first opening is arranged on one side of the top of the static contact base, which is far away from the moving contact disconnecting link, and a second opening is arranged on one side of the top of the static contact base, which is far towards the moving contact disconnecting link;
the static contact operating rod is rotatably arranged in the first opening;
the static contact is located in the second opening when in the first position.
As a preferred embodiment of the disconnecting link, a first handle is disposed at one end of the static contact operating rod, which is disposed outside the static contact base.
As a preferred scheme of the disconnecting link, the moving contact is provided with a concave surface, and the concave surface can be matched with the static contact body.
As a preferable scheme of the disconnecting link, the moving contact operating rod is connected to the moving contact base through a torsion spring.
As a preferable mode of the disconnecting link, the movable contact operating rod is provided with a second handle at the rear side of the movable contact.
The invention has the beneficial effects that: when the switch is switched on, the moving contact and the static contact are mutually clamped and stably connected, when the switch is switched off, the static contact operating rod drives the moving contact and the static contact to return to the second position from the first position, so that the static contact and the moving contact are separated, and meanwhile, the moving contact operating rod can automatically recover under the action of elastic force, so that the moving contact moves to a far position.
Drawings
Fig. 1 is a schematic structural diagram of a disconnecting link according to an embodiment of the present application when closing;
FIG. 2 is a schematic structural diagram of a knife switch according to an embodiment of the present application when the knife switch is opened;
fig. 3 is an enlarged view of a portion of the knife gate shown in fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The invention provides a disconnecting link, wherein fig. 1 is a schematic structural diagram of the disconnecting link in an embodiment of the application when the disconnecting link is switched on, and fig. 2 is a schematic structural diagram of the disconnecting link in the embodiment of the application when the disconnecting link is switched off.
As shown in fig. 1 and fig. 2, the disconnecting link according to the embodiment of the present invention includes a fixed disconnecting link 100 and a movable disconnecting link 200, where the fixed disconnecting link 100 and the movable disconnecting link 200 are horizontally opposite to each other and have substantially the same height.
The static contact switch 100 comprises a static contact base 1, a static contact operating rod 2 and a static contact 3, wherein one end of the static contact operating rod 2 is arranged outside the static contact base 1, the other end of the static contact operating rod 2 is arranged inside the static contact base 1 and is in transmission connection with the static contact 3, the static contact operating rod 2 can drive the static contact 3 to rotate from the first position to the second position by rotating from the upper end point of the stroke to the lower end point of the stroke, and the static contact operating rod 2 abuts against the static contact base 1 at the lower end point of the stroke. It should be noted that the stationary contact 3 is shown in fig. 1 when in the first position, and the stationary contact 3 is shown in fig. 2 when in the second position.
Moving contact switch 200 includes moving contact base 4, moving contact action bars 5 and moving contact 6, and moving contact base 4 sets up on the right side of static contact base 1, and moving contact action bars 5's one end articulates on moving contact base 4 and receives the elasticity that prevents its pushing down all the time, and moving contact action bars 5's the other end is equipped with moving contact 6.
It should be noted that the moving contact operating rod 5 is connected to the moving contact base 4 through a torsion spring, and the torsion spring provides elasticity to the moving contact operating rod 5.
The static contact 3 faces the moving contact base 4 when in the first position, and the moving contact 6 is clamped with the static contact 3 when the moving contact operating rod 5 is pressed to the lowest position.
It should be noted that, when the static contact operating rod 2 is rotated downwards to a horizontal position, the static contact 3 is located at the first position, and simultaneously, when the moving contact operating rod 5 is rotated downwards to a horizontal position, the moving contact 6 is clamped with the static contact 3.
Further, the static contact disconnecting link 100 further includes a fixed member 7 and a movable member 8.
The fixed part 7 is arranged inside the static contact base 1, and the middle part of the static contact operating rod 2 is rotatably connected to the fixed part 7.
The two ends of the movable part 8 are respectively and rotatably connected to the fixed part 7 and the static contact 3. In the embodiment of the present application, the movable member 8 has a transverse L-like structure.
A connecting plate 101 is arranged inside the static contact base 1, and an arc-shaped hole 102 is formed in the connecting plate 101. It should be noted that the connecting plate 101 is parallel to the side wall of the static contact base 1.
The bottom of the static contact 3 is rotatably connected to the connecting plate 101, the middle of the static contact 3 is provided with an inserting rod 30, and the inserting rod 30 is slidably arranged in the arc-shaped hole 102. It should be noted that the arc-shaped hole 102 has an arc-shaped edge so that the sliding rod 30 can rotate along an arc track, and further the static contact 3 can rotate along the arc-shaped hole 102.
The static contact 3 includes a static contact connecting frame 31 and a static contact body 32, and a first end of the static contact connecting frame 31 is connected to the connecting plate 101.
Fig. 3 is a partially enlarged view of the disconnecting link shown in fig. 1, wherein the stationary contact body 32 is connected to the second end of the stationary contact connecting frame 31, the stationary contact body 32 is in a truncated cone shape, and the diameter of the stationary contact body 32 gradually decreases from one end close to the stationary contact connecting frame 31 to the other end.
Both ends that static contact linking bridge 31 deviates from one side of static contact body 32 all are equipped with connecting portion 311, and one of them connecting portion 311 is on connecting plate 101 through first round pin hub connection, and another connecting portion 311 is through second round pin hub connection moving part 8.
Further, a first opening is arranged on the left side of the top of the static contact base 1, and a second opening is arranged on the right side of the top of the static contact base 1; wherein, the static contact operating rod 2 is rotatably arranged in the first opening; the stationary contact 3 is located in the second opening in the first position.
As shown in fig. 1, a first handle 20 is disposed at one end of the static contact operating rod 2 disposed outside the static contact base 1. The first handle 20 is made of an insulating material, and the rotation angle of the static contact operating rod 2 can be conveniently controlled by holding the first handle 20. The movable contact operating rod 5 is provided with a second handle 51 on the rear side of the movable contact 6. The second handle 51 is held to control the rotation angle of the movable contact operating rod 5 conveniently.
The movable contact 6 is provided with a recessed surface which can be matched with the static contact body 32. I.e. the concave surface has a frustoconical surface cooperating with the static contact body 32.
The working principle of the knife switch provided by the invention is as follows:
when the brake is opened, as shown in fig. 2, the moving contact operating rod 5 forms a certain included angle with the horizontal plane under the action of the torsion spring, and at the moment, the moving contact 6 does not contact the static contact 3; when the switch is closed, as shown in fig. 1, the moving contact operating rod 5 is pressed downward, the moving contact operating rod 5 overcomes the elastic force of the torsion spring, the moving contact 6 faces the static contact disconnecting link 100, the static contact operating rod 2 is swung to the lowest point (i.e., cannot be swung downward continuously), and at this time, the static contact 3 is moved from the second position to the first position and is clamped to the moving contact 6.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations, and substitutions will occur to those skilled in the art without departing from the scope of the present invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A knife switch, comprising:
the static contact disconnecting link (100) comprises a static contact base (1), a static contact operating rod (2) and a static contact (3), wherein one end of the static contact operating rod (2) is arranged outside the static contact base (1), the other end of the static contact operating rod is arranged inside the static contact base (1) and is in transmission connection with the static contact (3), the static contact operating rod (2) can drive the static contact (3) to rotate from a first position to a second position through rotating from an upper end point to a lower end point of a self stroke, and the static contact operating rod (2) abuts against the static contact base (1) at the lower end point of the stroke; and
the moving contact disconnecting link (200) comprises a moving contact base (4), a moving contact operating rod (5) and a moving contact (6), wherein the moving contact base (4) is arranged on one side of the static contact base (1), one end of the moving contact operating rod (5) is hinged to the moving contact base (4) and is always subjected to elastic force for preventing the moving contact operating rod from pressing down, and the moving contact (6) is arranged at the other end of the moving contact operating rod (5);
when the static contact (3) is at the first position and faces the moving contact base (4), and the moving contact operating rod (5) is pressed down to the lowest position, the moving contact (6) is clamped with the static contact (3).
2. The knife-switch of claim 1, characterized in that said static contact knife-switch (100) further comprises:
the fixed part (7) is arranged inside the static contact base (1), and the middle part of the static contact operating rod (2) is rotatably connected to the fixed part (7); and
and the two ends of the movable piece (8) are respectively and rotatably connected to the fixed piece (7) and the static contact (3).
3. The disconnecting link according to claim 2, characterized in that a connecting plate (101) is arranged inside the static contact base (1), and an arc-shaped hole (102) is formed in the connecting plate (101):
the bottom of the static contact (3) is rotatably connected to the connecting plate (101), an inserting rod (30) is arranged in the middle of the static contact (3), and the inserting rod (30) is slidably arranged in the arc-shaped hole (102).
4. The disconnecting link according to claim 3, characterized in that the stationary contact (3) comprises:
the first end of the static contact connecting frame (31) is connected to the connecting plate (101); and
the static contact body (32) is connected to the second end of the static contact connecting frame (31), the static contact body (32) is in a truncated cone shape, and the diameter of the static contact body (32) is gradually reduced from one end close to the static contact connecting frame (31) to the other end.
5. The disconnecting link according to claim 4, wherein two ends of one side of the static contact connecting frame (31) away from the static contact body (32) are provided with connecting portions (311), one of the connecting portions (311) is connected to the connecting plate (101) through a first pin, and the other connecting portion (311) is connected to the movable member (8) through a second pin.
6. The disconnecting switch according to any of the claims 1 to 5, characterized in that a side of the top of the static contact base (1) facing away from the movable contact disconnecting switch (200) is provided with a first opening, and a side facing the movable contact disconnecting switch (200) is provided with a second opening;
the static contact operating rod (2) is rotatably arranged in the first opening;
the stationary contact (3) is located in the second opening in the first position.
7. The disconnecting link according to claim 6, wherein a first handle (20) is disposed at an end of the static contact operating rod (2) disposed outside the static contact base (1).
8. The disconnecting link according to claim 4, characterized in that the movable contact (6) is provided with a recessed surface which can cooperate with the stationary contact body (32).
9. The disconnecting link according to claim 1, characterized in that said movable contact operating rod (5) is connected to said movable contact base (4) by means of a torsion spring.
10. The disconnector according to claim 1, characterized in that said movable contact operating rod (5) is provided with a second handle (51) on the rear side of said movable contact (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011149171.2A CN112349532B (en) | 2020-10-23 | 2020-10-23 | Knife switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011149171.2A CN112349532B (en) | 2020-10-23 | 2020-10-23 | Knife switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112349532A CN112349532A (en) | 2021-02-09 |
| CN112349532B true CN112349532B (en) | 2022-11-04 |
Family
ID=74360052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011149171.2A Active CN112349532B (en) | 2020-10-23 | 2020-10-23 | Knife switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112349532B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114256021B (en) * | 2021-12-10 | 2023-07-21 | 国网河北省电力有限公司元氏县供电分公司 | Automatic electric brake capable of preventing false touch |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4707574A (en) * | 1986-10-23 | 1987-11-17 | Kearney-National, Inc. | Disconnect switch with latch |
| WO2015103979A1 (en) * | 2014-01-07 | 2015-07-16 | S&C Electric (China) Company Ltd. | Outdoor low-voltage fuse disconnector |
| CN208422757U (en) * | 2018-06-11 | 2019-01-22 | 河北优创电气有限公司 | A kind of New Type Isolating Switch |
| CN109786169A (en) * | 2018-12-28 | 2019-05-21 | 国家电网公司 | New distribution net isolation switch |
| CN210325620U (en) * | 2019-10-12 | 2020-04-14 | 山东泰开智能配电有限公司 | Outdoor high-voltage isolating switch |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6946607B2 (en) * | 2002-12-12 | 2005-09-20 | Hubbell Incorporated | Resistance assembly for hookstick operated switching assembly |
| FR3003992B1 (en) * | 2013-03-28 | 2017-03-03 | Alstom Technology Ltd | AUTO LIGHTWEIGHT DEPLACANT DRIVER |
-
2020
- 2020-10-23 CN CN202011149171.2A patent/CN112349532B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4707574A (en) * | 1986-10-23 | 1987-11-17 | Kearney-National, Inc. | Disconnect switch with latch |
| WO2015103979A1 (en) * | 2014-01-07 | 2015-07-16 | S&C Electric (China) Company Ltd. | Outdoor low-voltage fuse disconnector |
| CN208422757U (en) * | 2018-06-11 | 2019-01-22 | 河北优创电气有限公司 | A kind of New Type Isolating Switch |
| CN109786169A (en) * | 2018-12-28 | 2019-05-21 | 国家电网公司 | New distribution net isolation switch |
| CN210325620U (en) * | 2019-10-12 | 2020-04-14 | 山东泰开智能配电有限公司 | Outdoor high-voltage isolating switch |
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| Publication number | Publication date |
|---|---|
| CN112349532A (en) | 2021-02-09 |
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