CN108597934B - Heavy-current anti-parallel disconnecting link - Google Patents
Heavy-current anti-parallel disconnecting link Download PDFInfo
- Publication number
- CN108597934B CN108597934B CN201810499336.5A CN201810499336A CN108597934B CN 108597934 B CN108597934 B CN 108597934B CN 201810499336 A CN201810499336 A CN 201810499336A CN 108597934 B CN108597934 B CN 108597934B
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- knife switch
- disconnecting link
- pile head
- blade
- insulating
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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
- H01H21/02—Details
- H01H21/14—Means for increasing contact pressure
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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
- H01H21/02—Details
- H01H21/18—Movable parts; Contacts mounted thereon
- H01H21/22—Operating parts, e.g. handle
- H01H21/30—Operating parts, e.g. handle not biased to return to a normal position upon removal of operating force
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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
- H01H21/56—Lever switches with blade-type contact co-operating with one or two spring-clip contacts, e.g. knife switch making contact in one position only
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a heavy-current anti-parallel disconnecting link, which comprises an insulating mounting bottom plate, a U-shaped lever support, an inner disconnecting link, an outer disconnecting link, levers, disconnecting link connecting rods and disconnecting link stop mechanisms, wherein the inner disconnecting link and the outer disconnecting link are respectively arranged on the inner side and the outer side of the insulating mounting bottom plate, the disconnecting link stop mechanisms are arranged on the insulating mounting bottom plate and are positioned on one side of the inner disconnecting link, the disconnecting link connecting rods are vertically arranged at one end of the disconnecting link stop mechanisms and extend to the lower part of the insulating mounting bottom plate to be connected with the outer disconnecting link, and the levers are respectively arranged at the upper ends of the disconnecting link connecting rods and extend to the two sides of the inner disconnecting link to be connected with the U-shaped lever support and the inner disconnecting link. Through the mode, the volume, the manufacturing, the operation convenience and the safety of the low-voltage heavy-current load regulation conversion device and the heavy-current test transformer primary and secondary voltage conversion device are improved, and the transformer primary and secondary voltage conversion device has the advantages of being good in thermal stability, compact in contact, smooth in opening and closing, small in contact resistance, small in impedance and the like.
Description
Technical Field
The invention relates to the field of advanced manufacturing technology equipment, namely low-voltage electric appliances, in particular to a high-current anti-parallel disconnecting link.
Background
In the prior art, the characteristic test equipment of the low-voltage electric appliance has the advantages that the test current is large, the instantaneous test current is 50-200KA even larger, the requirements on the dynamic and thermal stability of the low-voltage high-current test equipment are higher and higher, the original low-voltage disconnecting link product is mature, but the safety current-carrying capacity of the disconnecting link is higher, the installation volume is larger, and the occupied installation space is larger in the aspects of use and local performance. In the use process, such as when large current is suddenly generated, the electrodynamic force can easily lead the knife blade to bounce, so that the knife switch is burnt, equipment failure and electric appliance fire disaster are easily caused. The reliability requirement of the knife switch is also becoming an important technical index.
Disclosure of Invention
The invention mainly solves the technical problems of providing a high-current anti-parallel knife switch, which adopts a stop lock catch arranged on the knife switch to prevent the knife blade from loosening and rebounding, adopts double-knife anti-parallel operation to ensure that the current directions flowing through the inner and outer knife switches are the same, utilizes the principle of attraction of electromotive force generated by the same-direction current passing through a conductor to close the inner and outer knife switches when the knife switch is in a closing state and passes through high current, improves the volume, the manufacturing, the operation convenience and the safety of a low-voltage high-current load adjusting and converting device and a high-current testing transformer primary and secondary voltage converting device, has the advantages of good thermal stability, compact contact, smooth opening and closing, small contact resistance, small impedance and the like, and has wide market prospect in popularization of the low-voltage high-current load adjusting and converting device and the high-current testing transformer primary and secondary voltage converting device.
In order to solve the technical problems, the invention adopts a technical scheme that: the utility model provides a heavy current anti-parallel knife switch, including insulating mounting plate, U type lever support, interior knife switch, outer knife switch, lever, knife switch connecting rod and knife switch stop mechanism, interior knife switch and outer knife switch set up respectively in insulating mounting plate's inboard and outside, U type lever support set up at insulating mounting plate upper end and be located the intermediate position of interior knife switch below, knife switch stop mechanism set up on insulating mounting plate and be located one side of interior knife switch, the knife switch connecting rod vertically set up in knife switch stop mechanism's one end and extend to insulating mounting plate below and be connected with outer knife switch, the lever set up respectively in the upper end of knife switch connecting rod and extend to the both sides limit of interior knife switch and be connected with U type lever support and interior knife switch.
In a preferred embodiment of the present invention, the inner and outer knife switches are made of red copper pieces with the same cross section.
In a preferred embodiment of the invention, the inner knife switch comprises an inner knife switch fixed supporting insulating plate, an inner knife switch static pile head, an inner knife switch movable pile head, an inner knife switch insulating handle, an inner knife switch blade, an inner knife switch elastic steel plate and a knife handle fixing frame, wherein the inner knife switch fixed supporting insulating plate is arranged at the upper end of the U-shaped lever support, the inner knife switch static pile head and the inner knife switch movable pile head are respectively arranged at the upper end of the inner knife switch fixed supporting insulating plate and are bent and extended to two side edges of the U-shaped lever support, the rear end of the inner knife switch blade is movably connected with the inner knife switch movable pile head, the inner knife switch elastic steel plate is respectively arranged at the middle position of the outer side edge of the inner knife switch blade, and the inner knife switch insulating handle is connected with the inner knife switch blade through the inner knife handle fixing frame, and the inner knife switch elastic steel plate is two in number.
In a preferred embodiment of the invention, the outer knife switch comprises an outer knife switch operating handle, an outer knife switch static pile head, an outer knife switch moving pile head, an outer knife switch insulating handle, an outer knife switch blade, an outer knife switch elastic steel plate and a knife handle fixing frame, wherein the outer knife switch moving pile head and the outer knife switch static pile head are respectively arranged at the bottom of an insulating mounting bottom plate, the rear end of the outer knife switch blade is movably connected with the outer knife switch moving pile head, the outer knife switch elastic steel plate is respectively arranged at the middle position of the outer side edge of the outer knife switch blade, the outer knife switch insulating handle is connected with the outer knife switch blade through the outer knife handle fixing frame, and the outer knife switch operating handle is arranged at the front end of the outer knife switch insulating handle, wherein the number of the outer knife switch blade and the number of the outer knife switch elastic steel plates are two.
In a preferred embodiment of the present invention, the positions of the outer knife switch static pile head and the outer knife switch dynamic pile head correspond to the positions of the inner knife switch dynamic pile head and the inner knife switch static pile head respectively.
In a preferred embodiment of the present invention, the outer disconnecting link insulating handle is also connected to a disconnecting link.
In a preferred embodiment of the invention, one ends of the inner knife blade and the outer knife blade are respectively provided with a gap of 0.5mm, and one ends of the inner knife blade elastic steel plate and the outer knife blade elastic steel plate are respectively provided with a gap of 1 mm.
In a preferred embodiment of the present invention, the inner knife switch static pile head, the outer knife switch static pile head, the inner knife switch moving pile head, the outer knife switch moving pile head, the inner knife switch blade and the outer knife switch blade are all silver plated.
In a preferred embodiment of the invention, the disconnecting link stop mechanism comprises a disconnecting link stop pin, a spring, a disconnecting link lock pin positioning seat and a lever positioning mechanism operating handle, wherein the disconnecting link stop pin is horizontally arranged at the upper end of the insulating mounting bottom plate, one end of the disconnecting link stop pin is connected with the disconnecting link, the other end of the disconnecting link stop pin is connected with the disconnecting link lock pin positioning seat, the spring is arranged at the position of the connecting position of the disconnecting link stop pin and the disconnecting link lock pin positioning seat, and the disconnecting link stop mechanism operating handle is arranged at the bottom of the insulating mounting bottom plate and extends upwards to be connected with the disconnecting link stop pin.
In a preferred embodiment of the present invention, the knife switch connecting rod is provided with two position grooves, and the position grooves are matched with the knife switch stopping mechanism to lock the opening and closing positions of the inner knife switch and/or the outer knife switch.
The beneficial effects of the invention are as follows: according to the heavy-current anti-parallel disconnecting link, the stop lock catch arranged on the disconnecting link is adopted to prevent the loosening and rebound of the blade, the contact resistance of the disconnecting link is smaller through the technological improvement of the blade, the double-blade anti-parallel operation is adopted to enable the directions of currents flowing through the inner disconnecting link and the outer disconnecting link to be the same, the principle of attraction of electromotive force generated by the same-direction current through a conductor is utilized, the electromotive force generated when the heavy current passes through the disconnecting link in the closing state is utilized to close the inner disconnecting link and the outer disconnecting link, the volume and the manufacturing, the operation convenience and the safety of a low-voltage heavy-current load adjusting and converting device and a heavy-current testing transformer primary-level voltage converting device are improved, and the heavy-current anti-parallel disconnecting link has the advantages of good thermal stability, close contact, smooth opening and closing, small contact resistance, small impedance and the like, and has a wide market prospect in popularization of the low-voltage heavy-current load adjusting and heavy-current testing transformer primary-level voltage converting device.
Drawings
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
FIG. 1 is a side view of a preferred embodiment of a high current anti-parallel knife switch of the present invention;
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is a perspective view of FIG. 1;
the marks in the drawings are: 1. the device comprises an insulating mounting bottom plate, 2, a U-shaped lever support, 3, an inner knife switch, 4, an outer knife switch, 5, a lever, 6, a knife switch connecting rod, 7, a knife switch stop mechanism, 8, a shaft pin, 31, an inner knife switch fixed support insulating plate, 32, an inner knife switch static pile head, 33, an inner knife switch movable pile head, 34, an inner knife switch insulating handle, 35, an inner knife blade, 36, an inner knife switch elastic steel plate, 37, a knife handle fixing frame, 41, an outer knife switch operating handle, 42, an outer knife switch static pile head, 43, an outer knife switch movable pile head, 44, an outer knife switch insulating handle, 45, an outer knife blade, 46, an outer knife switch elastic steel plate, 47, a knife handle fixing frame, 71, a knife switch connecting rod stop pin, 72, a spring, 73, a knife switch locking pin positioning seat, 74 and a lever positioning mechanism operating handle.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 3, an embodiment of the present invention includes:
the utility model provides a heavy current anti-parallel knife switch, includes insulating mounting plate 1, U type lever support 2, interior knife switch 3, outer knife switch 4, lever 5, knife switch connecting rod 6 and knife switch stop mechanism 7, interior knife switch 3 and outer knife switch 4 set up respectively in the inboard and the outside of insulating mounting plate 1, U type lever support 2 set up at insulating mounting plate 1 upper end and be located the intermediate position of interior knife switch 3 below, knife switch stop mechanism 7 set up on insulating mounting plate 1 and be located one side of interior knife switch 3, knife switch connecting rod 6 vertical set up in the one end of knife switch stop mechanism 7 and extend to insulating mounting plate 1 below and be connected with outer knife switch 4, lever 5 set up respectively in the upper end of knife switch connecting rod 3 and extend to the both sides limit of interior knife switch 3 and be connected with U type lever support 2 and interior knife switch 3.
In the above description, the inner knife switch 3 and the outer knife switch 4 are made of red copper pieces with the same section.
The inner knife switch comprises an inner knife switch fixed support insulating plate 31, an inner knife switch static pile head 32, an inner knife switch movable pile head 33, an inner knife switch insulating handle 34, an inner knife switch blade 35, an inner knife switch elastic steel plate 36 and a knife handle fixing frame 37, wherein the inner knife switch fixed support insulating plate 31 is arranged at the upper end of the U-shaped lever support 2, the inner knife switch static pile head 32 and the inner knife switch movable pile head 33 are respectively arranged at the upper end of the inner knife switch fixed support insulating plate 31 and are bent and extend to two side edges of the U-shaped lever support 2, the rear end of the inner knife switch blade 35 is movably connected with the inner knife switch movable pile head 33, the inner knife switch elastic steel plate 36 is respectively arranged at the middle position of the outer side edge of the inner knife switch blade 35, and the inner knife switch insulating handle 34 is connected with the inner knife blade 35 through the inner knife handle fixing frame 37, and the inner knife switch elastic steel plate 36 are two in number.
As shown in fig. 2, the outer knife switch 4 includes an outer knife switch operating handle 41, an outer knife switch static pile head 42, an outer knife switch moving pile head 43, an outer knife switch insulating handle 44, an outer knife switch blade 45, an outer knife switch elastic steel plate 46 and a knife handle fixing frame 47, the outer knife switch moving pile head 43 and the outer knife switch static pile head 42 are respectively arranged at the bottom of the insulating mounting base plate 1, the rear end of the outer knife switch blade 45 is movably connected with the outer knife switch moving pile head 43, the outer knife switch elastic steel plate 46 is respectively arranged at the middle position of the outer side edge of the outer knife switch blade 42, the outer knife switch insulating handle 44 is connected with the outer knife switch blade 45 through the outer knife handle fixing frame 47, the outer knife switch operating handle 41 is arranged at the front end of the outer knife switch insulating handle 44, and the number of the outer knife switch blade 45 and the outer knife switch elastic steel plate 46 are two.
In the above description, the positions of the outer knife switch static pile head 42 and the outer knife switch moving pile head 43 correspond to the positions of the inner knife switch moving pile head 33 and the inner knife switch static pile head 32, respectively.
Further, the inner blade 35 and the outer blade 45 have a slit of 0.5mm at one end, and the inner blade spring steel plate 36 and the outer blade spring steel plate 46 have a slit of 1mm at one end. Wherein, the gap on the knife switch blade and the gap on the knife switch elastic steel plate are positioned on the same straight line; the inner blade spring steel plate 36 and the outer blade spring steel plate 46 are spring steel plates.
Still further, the inner disconnecting link insulating handle 34 and the outer disconnecting link insulating handle 44 are connected with the lever 5 and the disconnecting link connecting rod 6 through the shaft pin 8, and the lever 5 is installed on the U-shaped lever support 2 through the shaft pin.
In this embodiment, the inner knife switch static pile head 32, the outer knife switch static pile head 42, the inner knife switch moving pile head 33, the outer knife switch moving pile head 43, the inner knife switch blade 35 and the outer knife switch blade 36 are all silver-plated.
As shown in fig. 1 and 3, the knife switch stopping mechanism 7 comprises a knife switch connecting rod stopping pin 71, a spring 72, a knife switch connecting rod locking pin positioning seat 73 and a lever positioning mechanism operating handle 74, the knife switch connecting rod stopping pin 71 is horizontally arranged at the upper end of the insulating mounting bottom plate 1, one end of the knife switch connecting rod stopping pin 71 is connected with the knife switch connecting rod 6, the other end of the knife switch connecting rod stopping pin 71 is connected with the knife switch connecting rod locking pin positioning seat 73, the spring 72 is arranged at the position of the joint of the knife switch connecting rod stopping pin 71 and the knife switch connecting rod locking pin positioning seat 73, and the knife switch connecting rod stopping mechanism operating handle 74 is arranged at the bottom of the insulating mounting bottom plate 1 and extends upwards to be connected with the knife switch connecting rod stopping pin 71.
In this embodiment, the knife switch connecting rod 6 is provided with two position grooves (not shown), and the position grooves are matched with the knife switch stopping mechanism 7 to lock the opening and closing positions of the inner knife switch 3 and/or the outer knife switch 4.
Compared with the prior art, the high-current anti-parallel disconnecting link has the following advantages:
1. the knife switch blade and the knife switch elastic steel plate are modified, and the pressure of the knife switch elastic steel plate is set, so that the knife switch blade is better in contact with the static pile head, and the contact resistance of the knife switch is greatly reduced;
2. the limit knife switch stop mechanism and the spring in the knife switch stop mechanism are arranged on the knife switch, so that the knife switch blade is prevented from loosening and rebounding, the situation that the knife switch is damaged due to the bouncing of the knife switch blade caused by electric force is prevented, and the knife switch has the advantages of good stability, tight contact, smooth switch-on and switch-off and the like;
3. the double-knife anti-parallel operation is adopted, so that the directions of currents flowing through the inner knife switch and the outer knife switch are the same, the principle that electromotive force generated by the same-direction current passing through a conductor attracts each other is utilized, the inner knife switch and the outer knife switch are closed more tightly by the electromotive force generated when the large current passes through the knife switch in a closing state, and the volume, the manufacturing, the operation convenience and the safety of the low-voltage large-current load adjusting and converting device and the primary and secondary voltage converting device of the large-current testing transformer are improved.
In summary, the large-current anti-parallel knife switch prevents the loosening and rebound of the knife blade by adopting the stop lock catch arranged on the knife switch, the contact resistance of the knife switch is smaller by adopting the process improvement of the knife blade, the directions of the current flowing through the inner knife switch and the outer knife switch are the same by adopting the double-knife anti-parallel operation, the inner knife switch and the outer knife switch are more tightly closed by utilizing the principle of attraction of electromotive force generated by the same-direction current passing through a conductor when the knife switch is in a closing state and the electromotive force generated by the large current passes through the large current, the volume, the manufacturing, the operation convenience and the safety of the low-voltage large-current load adjusting and converting device and the large-current testing transformer primary and secondary voltage converting device are improved, and the large-current anti-parallel knife switch has the advantages of good thermal stability, close contact, smooth opening and closing, small contact resistance, small impedance and the like, and has wide market prospect in popularization of the low-voltage large-current load adjusting and large-current testing transformer primary and secondary voltage converting device.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present invention.
Claims (9)
1. The heavy-current anti-parallel disconnecting link is characterized by comprising an insulating mounting bottom plate, a U-shaped lever support, an inner disconnecting link, an outer disconnecting link, a lever, a disconnecting link and a disconnecting link stop mechanism, wherein the inner disconnecting link is arranged on the inner side of the insulating mounting bottom plate;
the inner knife switch comprises an inner knife switch fixed support insulating plate, an inner knife switch static pile head, an inner knife switch movable pile head, an inner knife switch insulating handle, an inner knife switch blade, an inner knife switch elastic steel plate and a knife handle fixing frame, wherein the inner knife switch fixed support insulating plate is arranged at the upper end of the U-shaped lever support, the inner knife switch static pile head and the inner knife switch movable pile head are respectively arranged at the upper end of the inner knife switch fixed support insulating plate and are bent and extend to two side edges of the U-shaped lever support, the rear end of the inner knife switch blade is movably connected with the inner knife switch movable pile head, the inner knife switch elastic steel plate is arranged at the middle position of the outer side edge of the inner knife blade, and the inner knife switch insulating handle is connected with the inner knife blade through the inner knife handle fixing frame;
the outer knife switch include outer knife switch operating handle, outer knife switch quiet pile head, outer knife switch moves pile head, outer knife switch insulating handle, outer knife switch blade, outer knife switch elastic steel plate and handle of a knife mount, outer knife switch move pile head and outer knife switch quiet pile head set up respectively in the bottom of insulating mounting plate, the rear end of outer knife switch blade and outer knife switch move pile head swing joint, outer knife switch elastic steel plate set up the intermediate position at outer knife switch blade lateral edge, outer knife switch insulating handle be connected with outer knife switch blade through outer handle of a knife mount, outer knife switch operating handle set up the front end at outer knife switch insulating handle, the position of outer knife switch quiet pile head correspond with the position of interior knife switch and move the position of pile head, outer knife switch move the position of pile head and interior knife switch quiet pile head correspond.
2. The heavy-current anti-parallel knife switch according to claim 1, wherein the inner knife switch and the outer knife switch are made of red copper pieces with the same cross section.
3. The heavy-current anti-parallel knife switch according to claim 1, wherein the number of the inner knife blade and the inner knife elastic steel plate is two.
4. The high-current anti-parallel knife switch according to claim 1, wherein the number of the outer knife blades and the outer knife elastic steel plates is two.
5. The high current anti-parallel knife switch of claim 1, wherein the outer knife switch insulating handle is further connected with a knife switch connecting rod.
6. The heavy-current anti-parallel knife switch according to claim 1, wherein one ends of the inner knife switch blade and the outer knife switch blade are respectively provided with a gap of 0.5mm, and one ends of the inner knife switch elastic steel plate and the outer knife switch elastic steel plate are respectively provided with a gap of 1 mm.
7. The heavy-current anti-parallel knife switch according to claim 1, wherein the inner knife switch static pile head, the outer knife switch static pile head, the inner knife switch moving pile head, the outer knife switch moving pile head, the inner knife switch blade and the outer knife switch blade are all silver-plated.
8. The heavy-current anti-parallel disconnecting link according to claim 1, wherein the disconnecting link stop mechanism comprises a disconnecting link stop pin, a spring, a disconnecting link lock pin positioning seat and a lever positioning mechanism operating handle, the disconnecting link stop pin is horizontally arranged at the upper end of the insulating mounting bottom plate, one end of the disconnecting link stop pin is connected with the disconnecting link, the other end of the disconnecting link stop pin is connected with the disconnecting link lock pin positioning seat, the spring is arranged at the position of the connecting part between the disconnecting link stop pin and the disconnecting link lock pin positioning seat, and the disconnecting link stop mechanism operating handle is arranged at the bottom of the insulating mounting bottom plate and extends upwards to be connected with the disconnecting link stop pin.
9. The heavy-current anti-parallel knife switch according to claim 8, wherein the knife switch connecting rod is provided with two position grooves, and the position grooves are matched with the knife switch stopping mechanism to lock the opening and closing positions of the inner knife switch and/or the outer knife switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810499336.5A CN108597934B (en) | 2018-05-23 | 2018-05-23 | Heavy-current anti-parallel disconnecting link |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810499336.5A CN108597934B (en) | 2018-05-23 | 2018-05-23 | Heavy-current anti-parallel disconnecting link |
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| Publication Number | Publication Date |
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| CN108597934A CN108597934A (en) | 2018-09-28 |
| CN108597934B true CN108597934B (en) | 2023-07-07 |
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| CN201810499336.5A Active CN108597934B (en) | 2018-05-23 | 2018-05-23 | Heavy-current anti-parallel disconnecting link |
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| CN105762000A (en) * | 2016-04-06 | 2016-07-13 | 中国船舶重工集团公司第七〇二研究所 | DC load isolation switch |
| CN207082475U (en) * | 2017-07-11 | 2018-03-09 | 国家电网公司 | The disconnecting switch of disconnecting link inside and outside a kind of band |
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| CN108597934A (en) | 2018-09-28 |
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