CN116705546A - Contact structure with built-in permanent magnet array and GIS quick isolating switch applied by contact structure - Google Patents
Contact structure with built-in permanent magnet array and GIS quick isolating switch applied by contact structure Download PDFInfo
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- CN116705546A CN116705546A CN202310825098.3A CN202310825098A CN116705546A CN 116705546 A CN116705546 A CN 116705546A CN 202310825098 A CN202310825098 A CN 202310825098A CN 116705546 A CN116705546 A CN 116705546A
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- 238000009826 distribution Methods 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H33/182—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
A contact structure with built-in permanent magnet array and GIS quick isolating switch of application, this contact structure includes a pair of annular permanent magnet integrated configuration that is set up under the shield cover and locates at the inside movable guide rod permanent magnet structure of the movable end contact conducting rod; the permanent magnet in the annular permanent magnet combination structure can be a combination of a plurality of permanent magnets or an integral annular permanent magnet; the polarities of the permanent magnets in the annular permanent magnet combination structure can be kept consistent, alternately distributed or symmetrically distributed; the permanent magnet structure of the movable guide rod is cylindrical or rectangular, and the end face of the strong magnetic field faces the inside of the movable contact and the fixed contact respectively; after the annular permanent magnet combination structure under the shielding cover is matched with the movable guide rod permanent magnet structure inside the movable end contact conducting rod, a magnetic field is generated in a gap area of the isolating switch contact, and current is switched on and off under the action of the magnetic field; the invention solves the problem that the environment-friendly gas is used to replace SF 6 In the case of gasesThe problem of insufficient small current breaking capacity of the traditional GIS rapid isolation switch structure.
Description
Technical Field
The invention belongs to the field of high-voltage GIS, and particularly relates to a contact structure with an interior permanent magnet array and a GIS rapid isolating switch applied to the contact structure.
Background
The traditional GIS isolating switch is to use SF 6 Gas as arc extinguishing and insulating medium, SF 6 The gas has good electrical properties, but due to SF 6 Is unfavorable for achieving the aim of 'double carbon', SF is treated by multiple countries in recent years 6 Is limited. Thus using environmental protection gas to replace SF in GIS 6 Becomes the current research hot spot, but the breaking capacity of the prior various environment-friendly alternative gases is obviously inferior to that of SF 6 . Under the condition of environment-friendly substitute gas, the structure of the traditional GIS rapid isolating switch can not meet the requirement of switching on and off small current. In order to improve the capability of the environment-friendly GIS to break off small current, the contact structure of the GIS is necessary to be improved and optimized.
Control of the arc is currently achieved mainly by applying a transverse magnetic field or a longitudinal magnetic field. The transverse magnetic field is mainly applied by adopting a transverse magnetic field contact structure, and the transverse magnetic field contact structure comprises a spiral groove contact structure, a universal contact structure and a cup-shaped transverse magnetic contact structure. The transverse magnetic field contact structure generates a transverse magnetic field perpendicular to the arc column current due to the current path during the opening and closing process, and the magnetic field drives the arc to move on the contact surface. The transverse magnetic contact has the advantages of simple structure and excellent conductivity, but the contact surface is ablated by an electric arc to generate deformation, so that fusion welding short circuit can be seriously generated between grooves, and the magnetic field effect is greatly reduced. The longitudinal magnetic field is mainly applied by adopting a longitudinal magnetic field contact structure, and the longitudinal magnetic field contact structure comprises a cup-shaped longitudinal magnetic contact structure, a horseshoe-shaped longitudinal magnetic contact structure, a quadrupole-shaped longitudinal magnetic contact structure and the like. Under the action of a longitudinal magnetic field, the electric arc can keep a diffused form, and electric arc spots are uniformly distributed on the surface of the electrode, so that the ablation of a contact is reduced, and the recovery of the intensity of a medium after the arc and the improvement of the breaking capacity are facilitated. However, the longitudinal magnetic field contact structure has the defects of complex structure and difficult manufacture.
For the structure of the GIS isolating switch, firstly, because of the existence of structures such as contact fingers and the like, a longitudinal magnetic field contact with a complex structure cannot be adopted, and secondly, the GIS isolating switch has the requirement of breaking large current, if a transverse magnetic field contact is adopted, ablation can be easily generated, so that the transverse magnetic field contact is damaged or fails, and therefore, the scheme of applying a magnetic field by adopting the magnetic field contact structure is not suitable for the GIS isolating switch.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a contact structure with an interior permanent magnet array and a GIS quick isolating switch applied by the contact structure, and solve the problem that the traditional environment-friendly GIS isolating switch structure is insufficient in small current switching-on and switching-off capability.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the contact structure with the built-in permanent magnet array comprises a moving end contact structure 201 and a fixed end contact structure 202, wherein the end part of the moving end contact structure 201 is a moving end contact shielding cover 107; a movable end conductor structure 101 is fixed at one end of the movable end contact shielding cover 107; a movable end conducting rod guide support structure 104 is fixed in the movable end conductor structure 101; the end part of the movable end conducting rod guide support structure 104, which is close to the movable end contact shielding cover 107, is fixed with a movable end plum blossom contact finger 108; a moving end annular permanent magnet supporting structure 105 is fixed in an inner space formed by the moving end contact shielding cover 107, the moving end conducting rod guiding supporting structure 104 and the moving end plum blossom contact finger 108; the movable end annular permanent magnet supporting structure 105 is internally grooved and is fixedly provided with a movable end permanent magnet array 106; the movable end contact conducting rod 102 in sliding connection is arranged in the movable end conducting rod guide supporting structure 104 and the movable end plum blossom contact finger 108; a movable guide rod permanent magnet structure 103 is fixedly arranged in the movable end contact conducting rod 102; the movable end contact conducting rod 102 forms complete cladding on the movable guide rod permanent magnet structure 103, so that arc ablation is prevented;
the end part of the fixed end contact structure 202 is a fixed end contact shielding cover 111; a stationary conductor structure 116 is fixed to one end of the stationary contact shield 111; a static end conductive rod guide support structure 115 is fixed inside the static end conductor structure 116; the end part of the static end conducting rod guide supporting structure 115 is fixed with a static end plum blossom contact finger 112; the inner part of the fixed end plum blossom contact finger 112 is provided with a cavity for accommodating the movable end contact conducting rod 102 when the contact is closed; a stationary annular permanent magnet supporting structure 114 is fixed in the inner space formed by the stationary contact shielding cover 111, the stationary conductive rod guiding supporting structure 115 and the stationary plum blossom contact finger 112; the inner part of the static end annular permanent magnet supporting structure 114 is grooved and fixed with a static end permanent magnet array 113;
the static end permanent magnet array 113, the moving end permanent magnet array 106 and the moving guide rod permanent magnet structure 103 inside the moving end contact conducting rod 102 are matched together, a composite magnetic field is generated in a contact gap area, the composite magnetic field acts on an arc generated in the breaking process, and the breaking capacity under the condition of small current is improved.
The moving end permanent magnet array 106 is a combination of a plurality of permanent magnets or an integral annular permanent magnet; the stationary permanent magnet array 113 is a combination of a plurality of permanent magnets or an integral ring-shaped permanent magnet.
When the moving-end permanent magnet array 106 and the static-end permanent magnet array 113 are a plurality of permanent magnet combinations, the S poles and the N poles of the permanent magnets in the static-end permanent magnet array 113 are kept consistent, when the number of the permanent magnets is even, the polarities of the permanent magnets are alternately distributed or symmetrically distributed, and when the number of the permanent magnets is even, the S poles and the N poles of the permanent magnets in the moving-end permanent magnet array 106 are also kept consistent; the permanent magnets of the moving end permanent magnet array 106 and the permanent magnets of the static end permanent magnet array 113 are placed with the same polarity opposite to each other or with different polarities opposite to each other;
when the moving end permanent magnet array 106 and the static end permanent magnet array 113 are an integral annular permanent magnet, the permanent magnets of the moving end permanent magnet array 106 and the permanent magnets of the static end permanent magnet array 113 are placed with the same polarity opposite to each other or with different polarities opposite to each other.
The movable guide rod permanent magnet structure 103 is cylindrical or rectangular, and the strong magnetic field end faces of the movable guide rod permanent magnet structure face the movable contact and the fixed contact respectively; the material of the moving-side annular permanent magnet supporting structure 105 and the static-side annular permanent magnet supporting structure 114 is an insulating non-magnetic conductive material.
The number of the permanent magnets in the moving end permanent magnet array 106 and the static end permanent magnet array 113 is kept consistent and is 2-30.
The central axes of the permanent magnets of the moving end permanent magnet array 106 and the static end permanent magnet array 113 respectively keep preset included angles with the central axes of the moving end plum blossom contact finger 108 and the static end plum blossom contact finger 112, and the preset included angles are 0-75 degrees.
The moving end permanent magnet array 106 and the static end permanent magnet array 113 remain stationary during the switching action, and the moving guide rod permanent magnet structure 103 inside the moving end contact conducting rod 102 moves along with the conducting rod during the switching action.
A GIS quick isolating switch comprises a contact structure of an interior permanent magnet array.
Compared with the prior art, the invention has the following advantages:
1) Aiming at the structural characteristics of the GIS isolating switch, the contact structure of the built-in permanent magnet array meeting the structural requirements is provided, the space under the metal shielding cover of the GIS isolating switch is ingeniously utilized to be matched with the permanent magnet array, the inner space of the movable contact conducting rod is utilized, the permanent magnet structure is embedded, the application of a magnetic field in the gap area of the isolating switch contact is realized, and the control effect on an electric arc is improved.
2) The turn-off capability of the environment-friendly GIS isolating switch under the condition of small turn-off current is improved. The contact structure of the built-in permanent magnet array in the invention realizes the control of the electric arc by using the magnetic field, improves the breaking capacity of the environment-friendly GIS isolating switch under the condition of small current, and well solves the problem of insufficient breaking capacity of the traditional structure of the environment-friendly GIS isolating switch.
3) The invention realizes the application of the composite magnetic field by adopting the permanent magnet array. Under the combined action of the permanent magnets, the combined action of the transverse magnetic field and the longitudinal magnetic field is realized in the gap area of the isolating switch contact, and the control action of the magnetic field on the electric arc is improved. On the premise of not damaging the electric field intensity distribution of the gap area of the isolating switch contact, the small current breaking capacity of the contact is improved.
4) The invention has simple structure, can be conveniently assembled and used, can promote the wide application of the environment-friendly GIS isolating switch, reduces the use of greenhouse gases, is beneficial to protecting the environment and promotes the realization of the 'double carbon' strategic target.
Drawings
Fig. 1 is an axial cross-sectional view of the contact structure of the embedded permanent magnet array of the present invention.
Fig. 2a is a left side view of the contact structure of the permanent magnet array of the present invention (with the movable side shield structure 107, movable side conductor structure 101, static side shield structure 111, static side conductor structure 116 removed) fitted with a plurality of permanent magnets.
Fig. 2b is a right side view of the contact structure of the permanent magnet array of the present invention (with the movable side shield structure 107, the movable side conductor structure 101, the static side shield structure 111, the static side conductor structure 116 removed) fitted with a plurality of permanent magnets.
Fig. 3a is a left side view of the contact structure of the permanent magnet array of the present invention (with the movable side shield structure 107, movable side conductor structure 101, static side shield structure 111, static side conductor structure 116 removed) fitted with an integral ring-shaped permanent magnet.
Fig. 3b is a right side view of the contact structure of the permanent magnet array of the present invention (excluding the moving side shield structure 107, the moving side conductor structure 101, the stationary side shield structure 111, the stationary side conductor structure 116) fitted with an integral ring-shaped permanent magnet, respectively.
Fig. 4 is a schematic view of a partial magnetic pole combination of two sets of permanent magnet arrays at the moving and static ends and a moving guide bar permanent magnet structure in the contact structure when a plurality of permanent magnets are assembled, wherein: fig. 4a is a schematic diagram showing that N poles and N poles of permanent magnets in a moving end permanent magnet array and a static end permanent magnet array are opposite, fig. 4b is a schematic diagram showing that S poles and N poles are opposite, fig. 4c is a schematic diagram showing that S poles and S poles are opposite, fig. 4d is a schematic diagram showing that N poles and S poles are opposite, fig. 4e shows that permanent magnets in a moving end permanent magnet array are distributed alternately, and fig. 4f shows that permanent magnets in a moving end permanent magnet array are distributed symmetrically.
Fig. 5 is a schematic view of a partial magnetic pole combination of two sets of permanent magnet arrays at the moving and static ends and a moving guide bar permanent magnet structure in the contact structure when an integral ring-shaped permanent magnet is assembled, wherein: the N pole and the S pole of the movable end annular permanent magnet are opposite, the N pole and the N pole of the movable end annular permanent magnet are opposite, the S pole and the S pole of the movable end annular permanent magnet are opposite, and the S pole and the N pole of the movable end annular permanent magnet are opposite, in FIG. 5a and FIG. 5 d.
Fig. 6a is a schematic view of a moving-side contact structure in a permanent magnet array contact structure equipped with a plurality of permanent magnets according to the present invention.
Fig. 6b is a schematic view of a static side contact structure in a permanent magnet array contact structure of the present invention in which a plurality of permanent magnets are assembled.
Fig. 7 is a schematic plan view of the GIS fast disconnector contact separation using a contact structure with an array of built-in permanent magnets according to the present invention.
Fig. 8 is a schematic plan view of the GIS fast disconnector contact of the present invention employing a contact structure of an interior permanent magnet array.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
Fig. 1 is an axial cross-sectional view of a contact structure with an array of interior permanent magnets of the present invention. As shown in fig. 1, a contact structure with an array of interior permanent magnets includes a moving end contact structure 201 and a stationary end contact structure 202. The movable side annular permanent magnet supporting structure 105 in the movable end contact structure 201 is welded at the base part of the movable end conducting rod guiding supporting structure 104, and the movable end plum blossom contact finger 108 is welded at the end part of the movable end conducting rod guiding supporting structure 104; the moving-end conducting rod guide supporting structure 104 and the moving-end contact shielding cover 107 are welded on the moving-side conductor structure 101; the moving end surrounding type permanent magnet structure is arranged at the lower part of the moving end contact shielding cover 107 of the moving end contact structure 201 but is not contacted, and surrounds the periphery of the moving end plum blossom contact finger structure 108 but is not contacted, and comprises a moving side annular permanent magnet supporting structure 105 with a slot inside and a moving end permanent magnet array 106 arranged in the slot; the movable guide rod permanent magnet structure 103 is arranged in the cavity of the movable end contact conducting rod 102 and is tightly attached to the movable end contact conducting rod 102 to form complete cladding, so that arc ablation is prevented. The static side annular permanent magnet supporting structure 114 in the static end contact structure 202 is welded on the base part of the static end conductive supporting structure 115, and the static end plum blossom contact finger structure 112 is welded on the end part of the static end conductive supporting structure 115; the stationary conductive support structure 115 and the stationary contact shield 111 are welded to the stationary conductor structure 116; the fixed end surrounding type permanent magnet structure is arranged at the lower part of the fixed end contact shielding cover 111 of the fixed end contact structure 202 but is not contacted, and surrounds the circumference of the fixed end plum blossom contact finger structure 112 but is not contacted, and the fixed end surrounding type permanent magnet structure of the fixed end contact structure 201 is consistent with the moving end surrounding type permanent magnet structure in the moving end contact structure 201, and comprises a fixed end annular permanent magnet supporting structure 114 with a notch and a fixed end permanent magnet array 113 arranged in the notch. The movable annular permanent magnet supporting structure 105 is made of insulating non-magnetic conductive materials, such as high-temperature resistant plastic materials (PPA, PA46 and the like), acrylic materials and the like, which can resist the high-temperature environment generated during the action of the GIS isolating switch, has good insulating property, can isolate the influence of an electric field in the working environment, is made of non-magnetic conductive materials, and has no influence on the magnetic field generated by the permanent magnet array. The moving end permanent magnet array 106 may be a combination of a plurality of permanent magnets or an integral ring-shaped permanent magnet; the movable guide rod permanent magnet structure 103 is cylindrical or rectangular, and the strong magnetic field end faces of the movable guide rod permanent magnet structure face the movable contact and the fixed contact respectively; the static annular permanent magnet supporting structure 114 is made of insulating non-magnetic conductive materials, such as high temperature resistant plastic materials (PPA, PA46 and the like), acrylic materials and the like, which can resist the high temperature environment generated during the action of the GIS isolating switch, has good insulating property, can isolate the influence of an electric field in the working environment, is a non-magnetic conductive material, and has no influence on the magnetic field generated by the permanent magnet array. The static end permanent magnet array 113 can be a combination of a plurality of permanent magnets or an integral annular permanent magnet, in the opening and closing process, an electric arc is generated in a gap between the upper surface of the movable end contact conducting rod 102 and the static end plum blossom contact finger 112, firstly, a magnetic field generated by the movable guide rod permanent magnet structure 103 in the movable end contact conducting rod 102 plays a main role, the electric arc is prevented from entering an aggregation state to ablate structures such as contacts, and the like, along with the movement of the movable end contact conducting rod 102, the electric arc enters a gap area of an isolating switch contact, and is acted by a composite magnetic field generated by the static end permanent magnet array 113, the movable end permanent magnet array 106 and the movable guide rod permanent magnet structure 103, and the electric arc stretches, moves and the like, so that the electric arc voltage is increased, and the method reduces the ablation degree of the electric arc to the contacts, and improves the opening and closing capability of a GIS under the condition of small current.
Fig. 2a and 2b are left and right side views, respectively, of the contact structure of the permanent magnet array of the present invention (excluding the moving side shield structure 107, the moving side conductor structure 101, the static side shield structure 111, and the static side conductor structure 116). The number of permanent magnets in the moving end permanent magnet array 103 and the static end permanent magnet array 113 is kept consistent and is 2-30, and the permanent magnets are uniformly distributed on the moving side annular permanent magnet supporting structure 105 and the static side annular permanent magnet supporting structure 114 along the circumference.
Fig. 3a and 3b are left and right side views, respectively, of the contact structure of the permanent magnet array of the present invention fitted with an integral ring-shaped permanent magnet (excluding the moving side shield structure 107, the moving side conductor structure 101, the static side shield structure 111, the static side conductor structure 116). The structure shown in fig. 3a and 3b is substantially identical to the contact structure of the permanent magnet array in which a plurality of permanent magnets are assembled, but the notches cut by the moving side annular permanent magnet support structure 105 and the static side annular permanent magnet support structure 114 are changed from a plurality of circular notches to an entire annular notch for fixing an entire annular permanent magnet.
Fig. 4 is a schematic view of a partial magnetic pole combination of two permanent magnet arrays at the moving and static ends and a moving guide rod permanent magnet structure in the contact structure when a plurality of permanent magnets are assembled. The movable guide rod permanent magnet structure 103 can have two magnetism, namely, the end face of the strong magnetic field facing the inside of the movable contact can be N pole or S pole, and the end face of the strong magnetic field facing the fixed contact is opposite to the end face of the strong magnetic field; the permanent magnets in the moving end permanent magnet array 106 and the stationary end permanent magnet array 113 may be opposite N poles (fig. 4 a), opposite S poles (fig. 4 b), opposite S poles (fig. 4 c), or opposite N poles and S poles (fig. 4 d); meanwhile, when the number of the permanent magnets in the moving end permanent magnet array 106 and the static end permanent magnet array 113 is even, the permanent magnet polarities can be distributed alternately or symmetrically, and fig. 4e and fig. 4f respectively show the permanent magnet polarities of the moving end permanent magnet array 106 to be distributed alternately and symmetrically, and under the condition of the alternate distribution, the action direction of the composite magnetic field generated by the moving end permanent magnet array 106 and the static end permanent magnet array 113 is mainly transverse, so that the electric arc moves towards the edge of the contact, and the electric arc is stretched and deformed in shape; in the case of symmetrical distribution, the action directions of the composite magnetic fields generated by the moving end permanent magnet array 106 and the static end permanent magnet array 113 coexist transversely and longitudinally, and the main action is longitudinal, so that the ablation of the electric arc on the contact is reduced to a greater extent.
Fig. 5 is a schematic view of a partial magnetic pole combination of two sets of permanent magnet arrays at the moving and static ends and a moving guide rod permanent magnet structure in the contact structure when an integral ring-shaped permanent magnet is assembled. The movable guide rod permanent magnet structure 103 can have two magnetism, namely, the end face of the strong magnetic field facing the inside of the movable contact can be N pole or S pole, and the end face of the strong magnetic field facing the fixed contact is opposite to the end face of the strong magnetic field; the permanent magnets in the moving end permanent magnet array 106 and the stationary end permanent magnet array 113 may be opposite N-pole and S-pole (fig. 5 a), opposite N-pole and N-pole (fig. 5 b), opposite S-pole and S-pole (fig. 5 c), or opposite S-pole and N-pole (fig. 5 d).
Fig. 6a and 6b are schematic diagrams of the permanent magnet combination of the moving end contact structure 201 and the fixed end contact structure 202 in the contact structure of the built-in permanent magnet array according to the present invention, respectively. As shown in fig. 6a, the moving-end permanent magnet assembly includes a moving-end annular permanent magnet support structure 105, a moving-end permanent magnet array 106, and a moving-guide-rod permanent magnet structure 103 disposed inside the moving-end contact conductive rod 102. As shown in fig. 6b, the stationary end permanent magnet assembly comprises a stationary end annular permanent magnet support structure 114 and a stationary end permanent magnet array 113. The central axes of the permanent magnets of the moving end permanent magnet array 106 and the static end permanent magnet array 113 respectively keep a certain preset included angle alpha with the central axes of the moving end plum blossom contact finger 108 and the static end plum blossom contact finger 112, the range of the preset included angle is 0-75 degrees, and under the range of the angle, the magnetic fields generated by the moving end permanent magnet array 106 and the static end permanent magnet array 113 can act on the electric arcs generated in the switching process to the maximum extent.
Fig. 7 is a schematic plan view of the GIS fast disconnector with contact structure incorporating an array of permanent magnets according to the present invention when the contacts are separated. The moving end permanent magnet array 106 and the stationary end permanent magnet array 113 used in the structure of the figure are a combination of a plurality of permanent magnets. As shown in fig. 7, a moving end basin insulator 122 and a stationary end basin insulator 125 of the GIS fast disconnector are connected to both ends of the outer casing 123, respectively. The center of the moving end basin-type insulator 122 is connected with a moving end insulator middle conductor structure 121, the moving end conductor structure 101 is welded on the moving end insulator middle conductor structure 121, the moving end conducting rod guide supporting structure 104 is connected on the moving end conductor structure 101, and the moving end contact conducting rod 102 penetrates through the centers of the moving end conductor structure 101 and the moving end conducting rod guide supporting structure 104. The moving end annular permanent magnet supporting structure 105 is connected to the moving end conducting rod guiding supporting structure 104, surrounds the moving end contact conducting rod 102 and the moving end plum blossom contact finger 108, and is not in contact. The moving end permanent magnet array 106 is uniformly placed in the moving end annular permanent magnet support structure 105. The movable guide rod permanent magnet structure 103 is arranged in the cavity of the movable end contact conducting rod 102 and is tightly attached to the movable end contact conducting rod 102. The moving-end contact shielding cover 107 is connected to the moving-end conductor structure 101, and the central axis coincides with the central axis of the moving-end quincuncial contact finger 108. The center of the stationary basin-type insulator 125 is connected with a stationary insulator middle conductor structure 124, the stationary conductor structure 116 is welded on the stationary insulator middle conductor structure 124, the stationary conductive rod guide support structure 115 is connected on the stationary conductor structure 116, and the stationary plum blossom contact finger 112 is connected on the stationary conductive rod guide support structure 115. The stationary annular permanent magnet support structure 114 is connected to the stationary conductive rod guide support structure 115 around the stationary plum blossom contact finger 112 but not in contact therewith. The stationary end permanent magnet array 113 is uniformly placed in a stationary end annular permanent magnet support structure 114, and the stationary end contact shield 111 is connected to a stationary end conductor structure 116.
Fig. 8 is a schematic plan view of the GIS fast disconnector contact of the present invention employing a contact structure with an array of built-in permanent magnets. The basic structure is identical to that described in fig. 7, except that the contacts of the GIS fast disconnector of fig. 8 have been closed. The movable contact conducting rod 102 moves forwards and is inserted into the cavity of the fixed plum blossom contact finger 112, and is tightly attached to the fixed plum blossom contact finger 112 and the fixed conducting rod guide supporting structure 115. The moving guide bar permanent magnet structure 103 moves with the moving end contact conducting rod 102.
The present invention is not limited to the above-described preferred embodiments and modifications and variations may be made by those skilled in the art in light of the teachings of the present invention to a novel contact structure with an interior permanent magnet array and GIS fast disconnectors for use therewith and related GIS fast disconnectors. All such modifications and variations are intended to be included herein within the scope of this disclosure.
Claims (9)
1. The utility model provides a contact structure with interior permanent magnet array, includes moving end contact structure (201) and quiet end contact structure (202), its characterized in that:
the end part of the movable end contact structure (201) is a movable end contact shielding cover (107); a movable end conductor structure (101) is fixed at one end of the movable end contact shielding cover (107); a movable end conducting rod guide supporting structure (104) is fixed in the movable end conductor structure (101); the end part of the movable end conducting rod guide supporting structure (104) close to the movable end contact shielding cover (107) is fixed with a movable end plum blossom contact finger (108); a movable end annular permanent magnet supporting structure (105) is fixed in an inner space formed by the movable end contact shielding cover (107), the movable end conducting rod guide supporting structure (104) and the movable end plum blossom contact finger (108); the movable end annular permanent magnet supporting structure (105) is internally grooved and is fixedly provided with a movable end permanent magnet array (106);
the movable end contact conducting rod (102) in sliding connection is arranged in the movable end conducting rod guide supporting structure (104) and the movable end plum blossom contact finger (108); a movable guide rod permanent magnet structure (103) is fixedly arranged in the movable end contact conducting rod (102); the movable end contact conducting rod (102) is used for forming complete coating on the movable guide rod permanent magnet structure (103) so as to prevent electric arc from being ablated;
the end part of the fixed end contact structure (202) is a fixed end contact shielding cover (111); a static end conductor structure (116) is fixed at one end of the static end contact shielding cover (111); a static end conducting rod guide supporting structure (115) is fixed inside the static end conductor structure (116); the end part of the static end conducting rod guide supporting structure (115) is fixed with a static end plum blossom contact finger (112); a cavity for accommodating the movable end contact conducting rod (102) when the contact is closed is formed in the fixed end plum blossom contact finger (112); a static end annular permanent magnet supporting structure (114) is fixed in an inner space formed by the static end contact shielding cover (111), the static end conducting rod guide supporting structure (115) and the static end plum blossom contact finger (112); the inner part of the static end annular permanent magnet supporting structure (114) is grooved and fixed with a static end permanent magnet array (113);
the static end permanent magnet array (113), the movable end permanent magnet array (106) and the movable guide rod permanent magnet structure (103) inside the movable end contact conducting rod (102) are matched together, a composite magnetic field is generated in a contact gap area, the composite magnetic field acts on an arc generated in the switching-on and switching-off process, and the switching-on and switching-off capability under the condition of small current is improved.
2. A contact structure having an array of interior permanent magnets as defined in claim 1, wherein: the moving end permanent magnet array (106) is a combination of a plurality of permanent magnets or an integral annular permanent magnet; the static end permanent magnet array (113) is a combination of a plurality of permanent magnets or an integral annular permanent magnet.
3. A contact structure having an array of interior permanent magnets as defined in claim 2, wherein: when the moving end permanent magnet array (106) and the static end permanent magnet array (113) are combined by a plurality of permanent magnets, the S poles and the N poles of the permanent magnets in the static end permanent magnet array (113) are consistent, when the number of the permanent magnets is even, the polarities of the permanent magnets are alternately distributed or symmetrically distributed, and when the number of the permanent magnets is even, the S poles and the N poles of the permanent magnets in the moving end permanent magnet array (106) are also consistent, and the polarities of the permanent magnets are alternately distributed or symmetrically distributed; the permanent magnets of the movable end permanent magnet array (106) and the permanent magnets of the static end permanent magnet array (113) are oppositely arranged in the same polarity or in different polarities;
when the moving end permanent magnet array (106) and the static end permanent magnet array (113) are an integral annular permanent magnet, the permanent magnets of the moving end permanent magnet array (106) and the permanent magnets of the static end permanent magnet array (113) are oppositely arranged in the same polarity or are oppositely arranged in different polarities.
4. A contact structure having an array of interior permanent magnets as defined in claim 1, wherein: the movable guide rod permanent magnet structure (103) is cylindrical or rectangular, and the strong magnetic field end faces of the movable guide rod permanent magnet structure face the movable contact and the fixed contact respectively.
5. A contact structure having an array of interior permanent magnets as defined in claim 1, wherein: the movable side annular permanent magnet supporting structure (105) and the static side annular permanent magnet supporting structure (114) are made of insulating non-magnetic conductive materials.
6. A contact structure having an array of interior permanent magnets as defined in claim 1, wherein: the number of the permanent magnets in the moving end permanent magnet array (106) and the static end permanent magnet array (113) is kept consistent and is 2-30.
7. A contact structure having an array of interior permanent magnets as defined in claim 1, wherein: the central axes of the permanent magnets of the moving end permanent magnet array (106) and the static end permanent magnet array (113) respectively keep a preset included angle with the central axes of the moving end plum blossom contact finger (108) and the static end plum blossom contact finger (112), and the preset included angle is 0-75 degrees.
8. A contact structure having an array of interior permanent magnets as defined in claim 1, wherein: the moving end permanent magnet array (106) and the static end permanent magnet array (113) are kept static during the switching action, and the moving guide rod permanent magnet structure (103) inside the moving end contact conducting rod (102) moves along with the conducting rod during the switching action.
9. A GIS quick isolating switch is characterized in that: the GIS fast disconnector comprises the contact structure of the interior permanent magnet array of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310825098.3A CN116705546A (en) | 2023-07-06 | 2023-07-06 | Contact structure with built-in permanent magnet array and GIS quick isolating switch applied by contact structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310825098.3A CN116705546A (en) | 2023-07-06 | 2023-07-06 | Contact structure with built-in permanent magnet array and GIS quick isolating switch applied by contact structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116705546A true CN116705546A (en) | 2023-09-05 |
Family
ID=87831267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310825098.3A Pending CN116705546A (en) | 2023-07-06 | 2023-07-06 | Contact structure with built-in permanent magnet array and GIS quick isolating switch applied by contact structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116705546A (en) |
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2023
- 2023-07-06 CN CN202310825098.3A patent/CN116705546A/en active Pending
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