CN210325620U - Outdoor high-voltage isolating switch - Google Patents
Outdoor high-voltage isolating switch Download PDFInfo
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- CN210325620U CN210325620U CN201921704095.XU CN201921704095U CN210325620U CN 210325620 U CN210325620 U CN 210325620U CN 201921704095 U CN201921704095 U CN 201921704095U CN 210325620 U CN210325620 U CN 210325620U
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Abstract
The utility model discloses an outdoor high-voltage isolating switch, which relates to the field of isolating switches of power systems, and designs that a contact and a wire holder are integrally formed, the electric conductivity is good, and the structure is stable; the transverse trapezoidal structure of the moving contact is designed, so that the distance between two contact plates of the contact knife is increased, the heat dissipation neps are increased, and the temperature rise is favorably reduced; the contact knife and the moving contact are engaged more tightly due to the structural improvement of the contact knife and the moving contact, the mechanical strength of the contact plate is improved, and the dynamic stability of the switch is enhanced; the connecting structure of the contact knife and the static contact ensures that the contact pressure of the contact knife is maintained by connecting springs at two ends, thereby prolonging the service life of the contact knife; the main shaft support frame and the base are of detachable structures, so that the replacement is convenient; the guide rod and the spring structure ensure that the contact knife is supported when the switch is in a switching-on and switching-off state, the safety is improved, and meanwhile, the switching-on and switching-off operation is simpler and faster by utilizing the rotation of the switching-on and switching-off pull rod operation main shaft, so that the switch is suitable for large-scale popularization and application.
Description
Technical Field
The utility model relates to an electric power system isolator field, specific outdoor high voltage isolator that says so.
Background
An isolating switch (commonly known as a "knife switch") is a high-voltage isolating switch, and is mainly used in an outdoor alternating-current 10-40.5kv and 50HZ power system to perform switching of a live high-voltage line and electrical isolation of the live high-voltage line from electrical equipment such as a high-voltage bus or a circuit breaker to be overhauled. The isolating switch is mainly characterized by no arc extinguishing capability and only can be used for switching on and off the circuit under the condition of no load current. The product is widely applicable to the fields of electric power, railways, mines, oil fields and the like. The working principle and the structure of the device are simple, but the device has high requirements on working reliability due to large usage amount, and has large influence on the design, the establishment and the safe operation of a substation and a power plant.
Existing high voltage isolation switches include: the movable contact is connected with the movable contact through a first connecting terminal, the fixed contact is connected with a second connecting terminal, two contact plates are connected between the two contacts in parallel, one end of each contact plate is hinged to the fixed contact, and the other end of each contact plate can be closed or separated from the movable contact.
The existing high-voltage isolating switch structure has the following defects:
1. the movable contact, the fixed contact and the corresponding connecting terminal are connected in a non-integrated mode, the disconnecting link and the contact are electrically connected with the terminals to form a loop, and due to the influence of the tightness of connection among components, the risk of loop loss is increased, so that the loop resistance of the whole high-voltage isolating switch is relatively high; meanwhile, the contact part and the wiring part are not integrated and have stable quality;
2. the conventional switch has narrow contact knife distance, is not beneficial to heat dissipation, causes overhigh temperature rise and influences the stable operation of the switch;
3. the existing isolating switch has the umbrella groups with the same diameter on the outer circumference of the insulating strut, so that the environmental adaptability and the voltage resistance grade of the product are not very high;
4. the existing switch needs split-phase installation and operation, an operating rod needs to be used for pushing a contact knife to switch on during switching on, operation is labor-consuming, the fracture distance is guaranteed by the dead weight of the contact knife after switching off, and safety cannot be guaranteed.
Disclosure of Invention
For solving the technical problem that above-mentioned exists, the utility model provides an outdoor high voltage isolator touches sword and the tight meshing of contact, stable in structure, and the heat-sinking capability is strong, and electric conductive property is good, divide-shut brake easy operation swift, safe and reliable.
The utility model provides a technical scheme that its technical problem adopted is:
an outdoor high-voltage isolating switch is composed of three single stages with the same structure and arranged on the same base side by side, each single stage comprises two post insulators, a static contact, an insulating pull rod, a contact knife and a moving contact, the two post insulators of each single stage are respectively and fixedly arranged at corresponding positions on two sides of the base, the tops of the two post insulators are respectively and fixedly provided with the static contact and the moving contact which are integrally formed with a wire holder, one end of the contact knife is movably connected with the static contact, the other end of the contact knife is lapped on the moving contact, a rotatable main shaft and a main shaft supporting frame are arranged on the base in a direction perpendicular to the post insulators, a crank arm mechanism is arranged on the main shaft, the insulating pull rod is arranged between the contact knife and the main shaft, one end of the insulating pull rod is movably connected with the contact knife, the other end of the insulating pull rod, one end of the guide rod is movably connected with a crank arm mechanism on the main shaft, the other end of the guide rod penetrates through the spring to be inserted into a spring seat movably connected to the movable contact side on the base, the main shaft is driven to rotate through the opening and closing pull rod during operation, the main shaft drives the guide rod to radially move in a round hole of the spring seat, the spring is compressed or extended, meanwhile, the crank arm mechanism of the main shaft drives the insulating pull rod to move, and the contact knife is driven to move to realize opening and closing.
The contact end of the moving contact is transversely trapezoidal, the periphery of the moving contact is provided with an arc-shaped guide structure, the contact knife is composed of two contact plates which are arranged side by side, the movable end of the contact knife is connected with the static contact through a support clamping and pin-joint screw rod, and the other end of the contact knife is in adaptive surface contact with the outer side face of the contact end of the moving contact.
The periphery of the post insulator is provided with an umbrella group consisting of umbrella blades with different diameters and alternatively appearing sizes.
And graphite silver plating layers are arranged outside the wire holders of the static contact and the moving contact.
The middle part of the opening and closing pull rod is connected with the main shaft and can drive the main shaft to rotate, and two ends of the opening and closing pull rod are respectively provided with a half-opened side hanging hole for opening and closing.
The utility model has simple structure, the design of the integrated forming of the contact and the wire holder, good conductive performance and stable structure; the transverse trapezoidal structure of the moving contact is designed, so that the distance between two contact plates of the contact knife is increased, the heat dissipation neps are increased, and the temperature rise is favorably reduced; the contact knife and the moving contact are engaged more tightly due to the structural improvement of the contact knife and the moving contact, the mechanical strength of the contact plate is improved, and the dynamic stability of the switch is enhanced; the connecting structure of the contact knife and the static contact ensures that the contact pressure of the contact knife is maintained by connecting springs at two ends, thereby prolonging the service life of the contact knife; the main shaft support frame and the base are of detachable structures, so that the replacement is convenient; the guide rod and the spring structure ensure that the contact knife is supported when the switch is in a switching-on and switching-off state, the safety is improved, and meanwhile, the switching-on and switching-off operation is simpler and faster by utilizing the rotation of the switching-on and switching-off pull rod operation main shaft, so that the switch is suitable for large-scale popularization and application.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a side view of the single stage switch of the present invention;
FIG. 3 is a schematic top view of the present invention;
FIG. 4 is a schematic view of the structure of the guide rod and the spring of the present invention;
FIG. 5 is a schematic side view of the single-stage switch of the present invention;
fig. 6 is a schematic view of the single-stage switch of the present invention for inverted 45 ° installation.
Detailed Description
The invention is described in detail below with reference to the following figures and specific embodiments:
as shown in fig. 1-4, an outdoor high-voltage isolating switch is composed of three single stages with the same structure and arranged on the same base 7 in parallel, each single stage includes a post insulator 1, a static contact 2, an insulating pull rod 3, a contact knife 4 and a moving contact 5, each single stage of post insulators 1 is provided with two post insulators, the post insulators are respectively and vertically fixed on the corresponding positions of two sides of the base 7, the top of each post insulator 1 is respectively and fixedly provided with the static contact 2 and the moving contact 5 which are integrally formed with a wire holder, one end of the contact knife 4 is movably connected to the static contact 2, the other end of the contact knife 4 is lapped on the moving contact 5, a rotatable main shaft 11 and a main shaft support 12 are arranged on the base 7 in the direction perpendicular to the post insulators 1, a crank arm mechanism is arranged on the main shaft 11, the insulating pull rod 3 is arranged between the, The other end of the guide rod 8 is connected with a crank arm mechanism on the main shaft 11, the base 7 is further provided with a guide rod 8, one end of the guide rod 8 is movably connected with the crank arm mechanism on the main shaft 11, the other end of the guide rod penetrates through the spring 9 to be inserted into a spring seat 10 movably connected to the movable contact side on the base 7, the main shaft 11 is driven to rotate through the opening and closing pull rod 6 during operation, the main shaft 11 drives the guide rod 8 to radially move in a circular hole of the spring seat 10, the spring 9 is compressed or extended, meanwhile, the crank arm mechanism of the main shaft 11 drives the insulating pull rod 3 to move, and the touch knife 4 is driven to move.
As a preferable mode, in this embodiment, the contact end of the moving contact 5 is set to be horizontal trapezoidal, the periphery is set to be arc-shaped guide structure, the contact knife 4 is composed of two contact plates arranged side by side, the moving end of the contact knife is clamped by the bracket and is connected with the static contact 1 through the pin joint screw rod, and the other end of the contact knife is in adaptive surface contact with the outer side surface of the contact end of the moving contact 5.
Preferably, in the present embodiment, the post insulator 1 is provided with a cluster of umbrella blades having different diameters and alternately arranged in size on the outer circumference.
In a preferred embodiment, graphite silver plating layers are disposed outside the wire holders of the fixed contact 2 and the movable contact 5.
Preferably, in this embodiment, the middle portion of the opening and closing lever 6 is connected to the main shaft 11 and can drive the main shaft 11 to rotate, and the two ends of the opening and closing lever 6 are respectively provided with a semi-open side hanging hole 61 for opening and closing.
The utility model can be installed on side or at an angle of 45 degrees, the specific installation mode is set according to the use scene, figure 5 is a schematic side installation diagram, figure 6 is a schematic inverted 45 degree diagram,
during the separating brake, use the action bars to hang the side hanging hole 61 of the separating brake side of the opening and closing pull rod 6, stimulate the opening and closing pull rod 6 to make the main shaft 11 rotate, drive the guide bar 8 to move, compress the spring 9, simultaneously the connecting lever mechanism of the main shaft 11 drives the insulating pull rod 3, make the contact knife 4 rotate, at this moment the contact knife 4 separates from the moving contact 5, after the guide bar 8 passes through the dead point, the elasticity of the spring 9 pushes the guide bar 8 to move rapidly, drive the main shaft 11 to rotate, simultaneously the insulating pull rod 3 continues to drive the contact knife 4 to rotate, until reaching sufficient fracture safe distance.
When the switch is switched on, the side hanging hole 61 on the switch-on side of the switch-on/switch-off pull rod 6 is pulled to enable the main shaft 11 to rotate, the guide rod 8 is driven to compress the spring 9, meanwhile, the insulating pull rod 3 drives the contact knife 4 to rotate to start switch-on, after the guide rod 8 passes through a dead point, the elasticity of the dark yellow 9 pushes the guide rod 8 to rapidly move to the west and east to further drive the main shaft 11 to continue rotating, the contact knife 4 is driven by the insulating pull rod 3 to reach the final point of a necessary position and is tightly meshed with the movable contact 5.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.
Claims (5)
1. An outdoor high-voltage isolating switch is characterized by consisting of three single stages with the same structure and arranged on the same base (7) in parallel, wherein each single stage comprises a post insulator (1), a static contact (2), an insulating pull rod (3), a contact knife (4) and a moving contact (5), each single stage of post insulator (1) is arranged into two parts and is respectively and vertically fixedly arranged at the corresponding positions at the two sides of the base (7), the top parts of the two post insulators (1) are respectively and fixedly provided with the static contact (2) and the moving contact (5) which are integrally formed with a wire holder, one end of the contact knife (4) is movably connected onto the static contact (2), the other end of the contact knife is lapped on the moving contact (5), a rotatable main shaft (11) and a main shaft supporting frame (12) are arranged on the base (7) in the direction vertical to the post insulators (1), and a crank arm mechanism is arranged, insulating pull rod (3) set up in touching between sword (4) and main shaft (11), its one end with touch sword (4) swing joint, the other end is connected with the turning arm mechanism on main shaft (11), still be provided with guide bar (8) on base (7), guide bar (8) one end and turning arm mechanism swing joint on main shaft (11), the other end passes spring (9) and inserts swing joint in spring holder (10) of moving contact side on base (7), during the operation, drives main shaft (11) through deciliter pull rod (6) and rotates, main shaft (11) drive guide bar (8) radial movement in the round hole of spring holder (10), make spring (9) compression or extension, the turning arm mechanism of main shaft (11) drives insulating pull rod (3) motion simultaneously, drives and divides and shut brake to realize touching sword (4) motion.
2. The outdoor high-voltage isolating switch as claimed in claim 1, wherein the contact end of the moving contact (5) is transversely trapezoidal, the periphery of the moving contact is provided with an arc-shaped guide structure, the contact blade (4) is composed of two contact plates which are arranged side by side, the movable end of the contact blade is connected with the static contact (2) through a bracket clamping and pin-jointed screw rod, and the other end of the contact blade is in adaptive surface contact with the outer side surface of the contact end of the moving contact (5).
3. An outdoor high-voltage disconnector according to claim 1, characterized in that the post insulator (1) is provided at its periphery with sheds of different diameters and alternating sizes.
4. An outdoor high-voltage isolating switch according to claim 1, characterized in that the outside of the wire holders of the fixed contact (2) and the movable contact (5) is provided with a graphite silver coating.
5. An outdoor high-voltage isolating switch according to claim 1, characterized in that the middle of the switching pull rod (6) is connected with the main shaft (11) and can drive the main shaft (11) to rotate, and two ends of the switching pull rod (6) are respectively provided with a half-opened side hanging hole (61) for opening and closing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921704095.XU CN210325620U (en) | 2019-10-12 | 2019-10-12 | Outdoor high-voltage isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921704095.XU CN210325620U (en) | 2019-10-12 | 2019-10-12 | Outdoor high-voltage isolating switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210325620U true CN210325620U (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921704095.XU Active CN210325620U (en) | 2019-10-12 | 2019-10-12 | Outdoor high-voltage isolating switch |
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| CN (1) | CN210325620U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112349532A (en) * | 2020-10-23 | 2021-02-09 | 广东电网有限责任公司清远供电局 | Knife switch |
| CN113257610A (en) * | 2021-05-13 | 2021-08-13 | 西安金叶电力科技有限公司 | High-voltage isolating switch, method for isolating power supply and application |
-
2019
- 2019-10-12 CN CN201921704095.XU patent/CN210325620U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112349532A (en) * | 2020-10-23 | 2021-02-09 | 广东电网有限责任公司清远供电局 | Knife switch |
| CN112349532B (en) * | 2020-10-23 | 2022-11-04 | 广东电网有限责任公司清远供电局 | Knife switch |
| CN113257610A (en) * | 2021-05-13 | 2021-08-13 | 西安金叶电力科技有限公司 | High-voltage isolating switch, method for isolating power supply and application |
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