CN113345754B - Variable force arm switch operating mechanism, grounding switch and isolating switch - Google Patents
Variable force arm switch operating mechanism, grounding switch and isolating switch Download PDFInfo
- Publication number
- CN113345754B CN113345754B CN202010694672.2A CN202010694672A CN113345754B CN 113345754 B CN113345754 B CN 113345754B CN 202010694672 A CN202010694672 A CN 202010694672A CN 113345754 B CN113345754 B CN 113345754B
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- blade
- arm
- main shaft
- blades
- force arm
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- 230000007246 mechanism Effects 0.000 title claims abstract description 34
- 238000000926 separation method Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
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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
- H01H31/003—Earthing switches
-
- 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
- H01H31/04—Interlocking mechanisms
- H01H31/08—Interlocking mechanisms for interlocking two or more parts of the mechanism for operating contacts
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model provides a variable force arm switch operating device, earthing switch and isolator, this variable force arm switch operating device includes main shaft and fixes the three-phase contact subassembly on the main shaft; each phase of contact assembly has the same structure and comprises a driving arm and a blade; one end of the driving arm is fixedly connected to the main shaft, the other end of the driving arm is connected with the blade, and the blade is driven to rotate through the rotation of the main shaft so as to be switched on or off with the fixed contact; the force arm which drives the driving arm to drive the blade to rotate anticlockwise through the anticlockwise rotation of the main shaft is different from the force arm which drives the driving arm to drive the blade to rotate clockwise through the clockwise rotation of the main shaft. The variable force arm switching mechanism provides a smaller force arm in the switching-on process so as to reduce the switching-on force, and provides a larger force arm in the switching-off process, so that the switching-off force is improved, the switching-on and switching-off variable force arm function is realized, and the switching performance is improved.
Description
Technical Field
The invention belongs to the technical field of switch cabinets, and particularly relates to a variable force arm switch operating mechanism, and a grounding switch and an isolating switch comprising the variable force arm switch operating mechanism.
Background
In the field of switch cabinets, the grounding switch and the isolating switch are all common components in the switch cabinet, and the reliability of the switch plays a vital role in the safety of maintenance personnel. Because the requirement on the opening and closing current is not high, the switch is usually in a knife switch mode, and in practical application of the knife switch, if the closing force is too large during closing, the switch can rebound after closing in place, so that the switch cannot be closed in place. When the switching-on force is adjusted to enable the switching-on to be in place, the clamping force is usually too large, and the phenomenon that the switching-on is difficult to break occurs, so that balance among the switching-on and switching-off forces is difficult to find.
Disclosure of Invention
Aiming at the switching-on and switching-off problems, the invention provides a variable force arm switch operating mechanism, a grounding switch and an isolating switch comprising the variable force arm switch operating mechanism, and the magnitude of a force arm of switching-on and switching-off can be adjusted: the smaller force arm is provided in the switching-on process, so that the switching-on force is reduced; and a larger force arm is provided during the brake separation, so that the brake separation force is improved.
To solve the above problems, a first aspect of the present invention provides a variable force arm switch operating mechanism, including a main shaft and a three-phase contact assembly fixed on the main shaft;
each phase of contact assembly has the same structure and comprises a driving arm and a blade; one end of the driving arm is fixedly connected to the main shaft, the other end of the driving arm is connected with the blade, and the blade is driven to rotate through the rotation of the main shaft so as to be switched on or off with the fixed contact;
the force arm which drives the driving arm to drive the blade to rotate anticlockwise through the anticlockwise rotation of the main shaft is different from the force arm which drives the driving arm to drive the blade to rotate clockwise through the clockwise rotation of the main shaft.
Further, two blades are arranged, one ends of the two blades are connected with the driving arm through bolts, and disc springs are arranged at two ends of the bolts, which are positioned at the outer sides of the two blades;
the other ends of the two blades are connected through bolts, gaskets are arranged between the two blades, and disc springs are mounted at two ends of the bolts, which are positioned at the outer sides of the two blades.
Further, when the main shaft rotates clockwise, the driving arm drives the blade to rotate clockwise, so that the blade contacts with the fixed contact and clamps the fixed contact, closing is realized, and the length of a force arm of the blade from the rotation center of the main shaft during closing is L1; when the main shaft rotates anticlockwise, the driving arm drives the blade to rotate anticlockwise, so that the blade is separated from the fixed contact, the breaking is realized, and the length of a force arm of the blade from the rotation center of the main shaft during breaking is L2, wherein L1 is less than L2.
Further, the blade is provided with four holes, two holes at two ends are round holes, and the connecting line of the centers of the two holes is parallel to the length direction of the blade; the round hole at one end is connected with the driving arm through a bolt, and the round hole at the other end is connected with the two blades through a bolt;
the middle two holes are oblong holes and are connected with the driving arm through guide posts, and the centers of the two oblong holes are respectively positioned at two sides of a connecting line of the centers of the two circular holes.
Further, the circle center of the semicircle at the lower end of the oblong hole with the small moment arm of the blade away from the rotation center of the main shaft and the circle center of the semicircle at the upper end of the oblong hole with the large moment arm of the blade away from the rotation center of the main shaft are both positioned on the connecting line of the circle centers of the circular holes at the two ends.
Further, the diameter size of two ends of the guide post is smaller than the middle diameter size, the middle large-diameter size cylinder of the guide post penetrates through the driving arm, the length of the guide post is equal to the distance between the two blades, the small-size cylinders at two ends are respectively connected with the strip holes of the two blades, and the length of the guide post is equal to the thickness of the blades.
Further, the distance between the two oblong holes is adjustable, so as to adjust the lengths of the force arms L1 and L2.
A second aspect of the invention provides a grounding switch comprising a variable force arm switch operating mechanism as claimed in any preceding claim.
A third aspect of the invention provides a disconnector comprising a variable force arm switch operating mechanism as claimed in any preceding claim.
In summary, the invention provides a variable force arm switch operating mechanism, a grounding switch and an isolating switch, wherein the variable force arm switch operating mechanism comprises a main shaft and a three-phase contact assembly fixed on the main shaft; each phase of contact assembly has the same structure and comprises a driving arm and a blade; one end of the driving arm is fixedly connected to the main shaft, the other end of the driving arm is connected with the blade, and the blade is driven to rotate through the rotation of the main shaft so as to be switched on or off with the fixed contact; the force arm which drives the driving arm to drive the blade to rotate anticlockwise through the anticlockwise rotation of the main shaft is different from the force arm which drives the driving arm to drive the blade to rotate clockwise through the clockwise rotation of the main shaft. The variable force arm switching mechanism provides a smaller force arm in the switching-on process so as to reduce the switching-on force, and provides a larger force arm in the switching-off process, so that the switching-off force is improved, the switching-on and switching-off variable force arm function is realized, and the switching performance is improved.
Drawings
FIG. 1 is a schematic diagram of a variable force arm switch operating mechanism in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of the location of a blade opening in accordance with an embodiment of the present invention;
fig. 3 is a schematic diagram of the length of the moment arm according to an embodiment of the present invention.
Detailed Description
The objects, technical solutions and advantages of the present invention will become more apparent by the following detailed description of the present invention with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The first aspect of the invention provides a variable force arm switch operating mechanism, which comprises a main shaft and a three-phase contact assembly fixed on the main shaft; each phase of contact assembly has the same structure and comprises a driving arm and a blade; one end of the driving arm is fixedly connected to the main shaft, the other end of the driving arm is connected with the blade, and the blade is driven to rotate through the rotation of the main shaft so as to be switched on or off with the fixed contact; the arm of force for driving the driving arm to drive the blade to rotate anticlockwise by the anticlockwise rotation of the main shaft is different from the arm of force for driving the driving arm to drive the blade to rotate clockwise by the clockwise rotation of the main shaft. Specifically, the structure of the variable force arm switch operating mechanism is shown in fig. 1, and the variable force arm switch operating mechanism comprises a main shaft 1 and three-phase contact assemblies with the same structure, wherein each phase of contact assembly comprises a driving arm 2, a blade 3, a disc spring 4, a guide post 5 and a gasket 6. The main shaft 1 is a rotation center, the three-phase contact assembly is welded and fixed with the main shaft 1 through a round hole at one end of the driving arm 2, the blades 3 are used in pairs, one end of each three-phase contact assembly is fixed at two sides of the driving arm through bolts and disc springs 4, the other ends of the two blades 2 are also fastened through the bolts and the disc springs 4, the two blades are supported by gaskets, two guide posts 5 are arranged between the two blades in each phase, the guide posts penetrate through the driving arm 2, and the two ends of each guide post are respectively inserted into strip holes shown in fig. 2 on the blades 2.
Further, the blade is provided with four holes, two holes at two ends are round holes, and the connecting line of the centers of the two holes is parallel to the length direction of the blade; the round hole at one end is connected with the driving arm through a bolt, and the round hole at the other end is connected with the two blades through a bolt; the middle two holes are oblong holes and are connected with the driving arm through guide posts, and the centers of the two oblong holes are respectively positioned at two sides of a connecting line of the centers of the two circular holes.
Further, as shown in fig. 2, the circle center of the semicircle at the lower end of the oblong hole with small moment arm of the blade away from the rotation center of the spindle and the circle center of the semicircle at the upper end of the oblong hole with large moment arm of the blade away from the rotation center of the spindle are all positioned on the connecting line of the circle centers of the circular holes at the two ends.
Further, the diameter size of two ends of the guide post is smaller than the middle diameter size, the middle large-diameter size cylinder of the guide post penetrates through the driving arm, the length of the guide post is equal to the distance between the two blades, the small-size cylinders at two ends are respectively connected with the strip holes of the two blades, and the length of the guide post is equal to the thickness of the blades.
As shown in fig. 1, from the left view: when the main shaft 1 rotates clockwise, the main shaft 1 drives the driving arm 2 to rotate clockwise due to the fact that the driving arm 2 is in welded connection with the main shaft 1, and at the moment, the lower guide post in the figure 1 is stressed to drive the blade 3 to rotate clockwise due to the limit of the strip hole on the left side in the figure 2, so that the closing operation of the mechanism is realized; similarly, when the main shaft 1 rotates anticlockwise, the main shaft 1 drives the driving arm 2 to rotate anticlockwise, and at the moment, the upper guide post in fig. 1 is stressed to drive the blade 3 to rotate anticlockwise due to the limit of the right long strip hole in fig. 2, so that the opening operation of the mechanism is realized.
When the device is specifically applied, the motion principle realized by the variable force arm of the mechanism is shown in an application schematic diagram of fig. 3, when the main shaft 1 rotates clockwise, the driving arm 2 drives the blade 3 to rotate clockwise, the blade contacts with the static end 7 and clamps the static end 7, so that closing is realized, and at the moment, the actual force arm for closing is L1 shown in fig. 3 due to the limiting of the strip hole of the blade 2 and the action of the guide post. When the mechanism is in a closing position with the static contact, the main shaft 1 rotates anticlockwise, and similarly, the driving arm 2 drives the blade 3 to rotate anticlockwise, and the actual arm of force of the opening is L2 shown in fig. 3 due to the limiting of the strip hole of the blade 2 and the action of the guide post. In practical application, the lengths of L1 and L2 can be changed by adjusting the relative positions of two strip holes on the blade 2, so that the magnitude of an arm of force of a mechanism opening and closing is changed, and the function of the arm of force of the mechanism opening and closing and changing the arm of force is realized.
A second aspect of the invention provides a grounding switch comprising a variable force arm switch operating mechanism as claimed in any preceding claim.
A third aspect of the invention provides a disconnector comprising a variable force arm switch operating mechanism as claimed in any preceding claim.
In summary, the invention provides a variable force arm switch operating mechanism, a grounding switch and an isolating switch, wherein the variable force arm switch operating mechanism comprises a main shaft and a three-phase contact assembly fixed on the main shaft; each phase of contact assembly has the same structure and comprises a driving arm and a blade; one end of the driving arm is fixedly connected to the main shaft, the other end of the driving arm is connected with the blade, and the blade is driven to rotate through the rotation of the main shaft so as to be switched on or off with the fixed contact; the force arm which drives the driving arm to drive the blade to rotate anticlockwise through the anticlockwise rotation of the main shaft is different from the force arm which drives the driving arm to drive the blade to rotate clockwise through the clockwise rotation of the main shaft. The variable force arm switching mechanism provides a smaller force arm in the switching-on process so as to reduce the switching-on force, and provides a larger force arm in the switching-off process, so that the switching-off force is improved, the switching-on and switching-off variable force arm function is realized, and the switching performance is improved.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and are in no way limiting of the invention. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the scope of the present invention. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.
Claims (6)
1. The force-variable arm switch operating mechanism is characterized by comprising a main shaft and a three-phase contact assembly fixed on the main shaft;
each phase of contact assembly has the same structure and comprises a driving arm and a blade; one end of the driving arm is fixedly connected to the main shaft, the other end of the driving arm is connected with the blade, and the blade is driven to rotate through the rotation of the main shaft so as to be switched on or off with the fixed contact;
the force arm for driving the driving arm to drive the blade to rotate anticlockwise by the anticlockwise rotation of the main shaft is different from the force arm for driving the driving arm to drive the blade to rotate clockwise by the clockwise rotation of the main shaft;
when the main shaft rotates clockwise, the driving arm drives the blade to rotate clockwise, so that the blade contacts with the fixed contact and clamps the fixed contact, closing is realized, and the length of a force arm of the blade from the rotation center of the main shaft during closing is L1; when the main shaft rotates anticlockwise, the driving arm drives the blade to rotate anticlockwise, so that the blade is separated from the fixed contact, the brake is separated, and the length of a force arm of the blade from the rotation center of the main shaft during brake separation is L2, wherein L1 is less than L2;
the blade is provided with four holes, two holes at two ends are round holes, and the connecting line of the centers of the two holes is parallel to the length direction of the blade; the round hole at one end is connected with the driving arm through a bolt, and the round hole at the other end is connected with the two blades through a bolt;
the middle two holes are oblong holes and are connected with the driving arm through guide posts, and the centers of the two oblong holes are respectively positioned at two sides of a connecting line of the circle centers of the two oblong holes;
the center of the semicircle at the lower end of the oblong hole with the small moment arm of the blade away from the rotation center of the spindle and the center of the semicircle at the upper end of the oblong hole with the large moment arm of the blade away from the rotation center of the spindle are both positioned on the connecting line of the centers of the circular holes at the two ends.
2. The variable force arm switch operating mechanism according to claim 1, wherein the number of the blades is two, one ends of the two blades are connected with the driving arm through bolts, and disc springs are mounted at two ends of the bolts, which are positioned at the outer sides of the two blades;
the other ends of the two blades are connected through bolts, gaskets are arranged between the two blades, and disc springs are mounted at two ends of the bolts, which are positioned at the outer sides of the two blades.
3. The variable force arm switch operating mechanism of claim 1, wherein the diameter dimension of the two ends of the guide post is smaller than the middle diameter dimension, the middle large diameter dimension cylinder of the guide post passes through the driving arm, the length of the middle large diameter dimension cylinder is equal to the distance between the two blades, the two small diameter dimension cylinders are respectively connected with the two blade strip holes, and the length of the middle large diameter dimension cylinder is equal to the thickness of the blades.
4. The variable force arm switch operating mechanism of claim 1, wherein the distance between the two oblong holes is adjustable to adjust the magnitude of the force arm lengths L1 and L2.
5. A grounding switch comprising the variable force arm switch operating mechanism of any one of claims 1-4.
6. A disconnector comprising a variable arm switch operating mechanism according to any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010694672.2A CN113345754B (en) | 2020-07-17 | 2020-07-17 | Variable force arm switch operating mechanism, grounding switch and isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010694672.2A CN113345754B (en) | 2020-07-17 | 2020-07-17 | Variable force arm switch operating mechanism, grounding switch and isolating switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113345754A CN113345754A (en) | 2021-09-03 |
| CN113345754B true CN113345754B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010694672.2A Active CN113345754B (en) | 2020-07-17 | 2020-07-17 | Variable force arm switch operating mechanism, grounding switch and isolating switch |
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| CN (1) | CN113345754B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254717A (en) * | 2011-06-23 | 2011-11-23 | 上海天灵开关厂有限公司 | Stage-type load switch operation mechanism |
| CN104217887A (en) * | 2014-09-23 | 2014-12-17 | 浙江华仪电器科技有限公司 | Energy storing outputting mechanism applied to spring operating mechanism |
| WO2016045028A1 (en) * | 2014-09-25 | 2016-03-31 | Abb技术有限公司 | Vacuum load switch |
| CN206421984U (en) * | 2017-01-13 | 2017-08-18 | Abb瑞士股份有限公司 | Three-station |
| CN107293443A (en) * | 2017-08-11 | 2017-10-24 | 宇光电气有限公司 | A kind of vacuum load switch operating mechanism |
| WO2018076455A1 (en) * | 2016-10-31 | 2018-05-03 | 国家电网公司 | Servo-drive isolation circuit breaker |
-
2020
- 2020-07-17 CN CN202010694672.2A patent/CN113345754B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254717A (en) * | 2011-06-23 | 2011-11-23 | 上海天灵开关厂有限公司 | Stage-type load switch operation mechanism |
| CN104217887A (en) * | 2014-09-23 | 2014-12-17 | 浙江华仪电器科技有限公司 | Energy storing outputting mechanism applied to spring operating mechanism |
| WO2016045028A1 (en) * | 2014-09-25 | 2016-03-31 | Abb技术有限公司 | Vacuum load switch |
| WO2018076455A1 (en) * | 2016-10-31 | 2018-05-03 | 国家电网公司 | Servo-drive isolation circuit breaker |
| CN206421984U (en) * | 2017-01-13 | 2017-08-18 | Abb瑞士股份有限公司 | Three-station |
| CN107293443A (en) * | 2017-08-11 | 2017-10-24 | 宇光电气有限公司 | A kind of vacuum load switch operating mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113345754A (en) | 2021-09-03 |
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