CN211182064U - Three-station isolation grounding switch - Google Patents
Three-station isolation grounding switch Download PDFInfo
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- CN211182064U CN211182064U CN202020204091.1U CN202020204091U CN211182064U CN 211182064 U CN211182064 U CN 211182064U CN 202020204091 U CN202020204091 U CN 202020204091U CN 211182064 U CN211182064 U CN 211182064U
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Abstract
A three-station isolation grounding switch comprises a shell and an operating mechanism, wherein a plurality of sealed cavities are arranged in the shell, a fracture switching device is arranged in each sealed cavity, each fracture switching device comprises a contact mechanism and a moving contact mechanism, the contact mechanism comprises an isolation static contact seat, an isolation middle contact seat, a three-station contact seat and a grounding static contact seat which are sequentially arranged at intervals, a first isolation fracture is arranged between the isolation static contact seat and the isolation middle contact seat, a second isolation fracture is arranged between the isolation middle contact seat and the three-station contact seat, and a grounding fracture is arranged between the three-station contact seat and the grounding static contact seat; the moving contact mechanism comprises an isolation moving contact, an insulating part and a three-station moving contact, and the insulating part serving as a mechanical locking device of the moving contact mechanism can be positioned in the second isolation fracture to enable the second isolation fracture to keep insulation. The utility model discloses a three-station isolation grounding switch is provided with the insulating part of mechanical shutting, prevents that moving contact mechanism from getting into the second at the removal in-process mistake and keeping apart the fracture and appearing the malfunction.
Description
Technical Field
The utility model relates to a high-tension transmission controlgear, concretely relates to three station isolation earthing switch.
Background
However, with the progress of power technology and the development of national economy, gas insulated SWITCHGEAR (GIS for short) is increasingly applied in the market by virtue of a series of advantages of small occupied area, low operation failure rate, light weight, maintenance-free performance and the like.
The GIS is composed of a circuit breaker, a disconnecting switch, a grounding switch, a mutual inductor, a lightning arrester, a bus, a connecting piece, an outgoing line terminal and the like, and all the equipment or components are enclosed in a metal grounded shell. GIS is the high-voltage electrical equipment of low fault rate, operational reliability are high, maintenance work load is few, overhaul the cycle length, but GIS also has its inherent shortcoming, because the influence of factors such as gaseous leakage, infiltration of outside moisture, conductive impurities's existence, insulator ageing, etc., all can lead to GIS inside flashover trouble, and its full seal structure makes the location of trouble and maintenance more difficult, and overhaul work is complicated, and the average power failure maintenance time is longer than conventional equipment after the accident, and its power failure scope is big, often relates to non-fault component.
Traditional GIS adopts single fracture isolator module, all need to have a power failure to former operation generating line when carrying out the reserve interval of GIS and expanding the installation and handing-over withstand voltage test, and the personal injury that the fracture discharge breakdown caused is kept apart when avoiding the butt joint installation, keeps apart the emergence of the equipment incident that the fracture both ends reverse stack overvoltage led to discharge breakdown when preventing the handing-over test simultaneously. For an operation unit, coordinating the power failure of a substation bus means the delay of the project progress, the waste of manpower and material resources and the direct or indirect economic loss caused by the power failure.
At present, although a double-break isolating switch module also exists, the three-position isolating switch does not have a three-position mechanical locking function, and the three-position isolating switch occupies a large space and has a complex structure, so that the production cost is high.
Disclosure of Invention
An object of the utility model is to overcome prior art's defect, provide a simple structure and have three station isolation earthing switch of mechanical shutting function.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a three-station isolation grounding switch comprises a shell and an operating mechanism, wherein a plurality of sequentially communicated sealed cavities are arranged in the shell, a group of fracture switch devices driven by the operating mechanism is arranged in each sealed cavity, each group of fracture switch devices comprises a contact mechanism and a moving contact mechanism, the contact mechanism is fixedly arranged in the sealed cavity, and a guide channel for the moving contact mechanism to move is arranged on the contact mechanism; the contact mechanism comprises an isolation static contact seat, an isolation middle contact seat, a three-station contact seat and a grounding static contact seat which are sequentially arranged at intervals, wherein a gap between the isolation static contact seat and the isolation middle contact seat is used as a first isolation fracture, a gap between the isolation middle contact seat and the three-station contact seat is used as a second isolation fracture, and a gap between the three-station contact seat and the grounding static contact seat is used as a grounding fracture; the moving contact mechanism comprises an isolation moving contact, an insulating part and a three-station moving contact, the moving contact mechanism is driven by an operating mechanism to do reciprocating motion along a straight line in a guide channel, a first isolation fracture is conducted when the isolation moving contact is matched with an isolation static contact seat, a second isolation fracture is conducted when the three-station moving contact is matched with the three-station contact seat, a grounding fracture is conducted when the three-station moving contact is matched with a grounding static contact seat, and when the second isolation fracture needs to be kept insulated, the insulating part can be located in the second isolation fracture as a mechanical locking device of the moving contact mechanism to enable the second isolation fracture to be kept insulated.
Further, when a closing signal is received, the operating mechanism drives the moving contact mechanism to move towards the direction close to the isolation static contact seat, the isolation moving contact is matched with the isolation static contact seat to conduct the first isolation fracture, the three-station moving contact is matched with the three-station contact seat to conduct the second isolation fracture, and the grounding fracture keeps insulated; when an isolation signal is received, the operating mechanism drives the moving contact mechanism to move in the direction away from the isolation static contact seat, the isolation moving contact is disengaged from the isolation static contact seat to enable the first isolation fracture to be insulated, the three-station moving contact is disengaged from the second isolation fracture to enable the second fracture to be insulated, the insulating piece is located in the second isolation fracture to enable the second isolation fracture to be insulated, and the grounding fracture is insulated; when receiving the ground signal, operating device drive moving contact mechanism moves to ground connection stationary contact orientation, and first isolation fracture keeps insulating, and the insulating part makes second isolation fracture keep insulating, and the cooperation of three-station moving contact and ground connection stationary contact makes the ground connection fracture switch on.
Furthermore, the isolation static contact seat and the grounding static contact seat are respectively arranged at two ends of the sealed cavity, the centers of the isolation static contact seat, the isolation middle contact seat, the three-station contact seat and the grounding static contact seat are collinear, and the moving contact mechanism is driven by the operating mechanism to reciprocate between the isolation static contact seat and the grounding static contact seat along a straight line.
Furthermore, the isolation moving contact moves between the isolation static contact seat and the isolation middle contact seat, the insulating part moves between the isolation middle contact seat and the three-station contact seat, and the three-station moving contact moves between the isolation middle contact seat, the three-station contact seat and the grounding static contact seat.
Furthermore, the isolation moving contact, the insulating part and the three-station moving contact are rod-shaped and are sequentially connected to form a rod body which is coincident with the central axis of the guide channel.
Furthermore, the guide channel penetrates through the middle parts of the middle contact seat and the three-station contact seat, the part of the guide channel, which is used for isolating the middle contact seat, is a first movable interval, and the part of the guide channel, which is used for isolating the middle contact seat, is a second movable interval; the length of the isolation moving contact is greater than the distance between the first isolation fractures and smaller than the first movable interval; the length of the three-station moving contact is greater than the distance between the second isolation fractures and the distance between the grounding fractures and is less than or equal to the second movable interval; the length of the insulating part is greater than or equal to the distance of the second isolation fracture and less than or equal to the first interval.
Furthermore, the insulating part is formed by pouring epoxy resin, and metal joints are arranged at two ends of the insulating part and are used for being connected with the isolation moving contact and the three-station moving contact.
Furthermore, the operating mechanism comprises an insulating pull rod, the insulating pull rod extends into the three-station contact base, a driving gear for driving the moving contact mechanism is sleeved on the insulating pull rod, and a driven rack meshed with the driving gear is arranged on the three-station moving contact; under the matching of the driven rack and the driving gear, the three-station moving contact drives the moving contact mechanism to do reciprocating motion along a straight line in the guide channel.
Further, an arc striking contact is arranged in the isolation static contact seat, and one end of the arc striking contact, which is matched with the isolation moving contact, is of a petal-shaped structure; a self-force contact finger and a shielding cover are arranged on one side of the isolation middle contact base close to the second isolation fracture, the shielding cover is sleeved outside the self-force contact finger, and an arc striking piece is arranged between the self-force contact finger and the shielding cover; and an arc striking part is arranged at one end of the three-station moving contact, which is used for being matched with the three-station contact seat and the grounding contact seat.
Furthermore, a grounding contact seat is installed at the upper end of the isolation middle contact seat, a grounding moving contact is arranged above the grounding contact seat, and the grounding moving contact moves downwards to be matched with the grounding contact seat so as to enable the isolation middle contact seat to be grounded.
Furthermore, a supporting insulator is arranged in the sealed cavity, the isolation middle contact seat is arranged on the supporting insulator, and the isolation static contact seat and the three-station contact seat are respectively supported on the two insulating basins.
Furthermore, an adsorption device is arranged in the sealed cavity.
Further, the isolation stationary contact base is connected with a grounding insulator, the grounding insulator penetrates through the shell and extends out of the sealed cavity, the grounding insulator is provided with a grounding copper bar, one end of the grounding copper bar is connected with the grounding insulator, and the other end of the grounding copper bar is connected to the shell.
The utility model discloses a three-station isolation grounding switch sets up the insulating part as mechanical shutting at moving contact mechanism, in moving contact mechanism motion process, when needs make the second keep apart the fracture and keep insulating, the insulating part can be located the second and keep apart the fracture and keep insulating as moving contact mechanism's mechanical blocking device, prevents that moving contact mechanism from getting into the second at the removal in-process mistake and keeping apart the fracture and the malfunction appears.
In addition, the isolation moving contact, the insulating part and the three-station moving contact are connected to form a rod body with the axes coincident with each other, so that the space occupied by the moving contact mechanism is favorably reduced; the grounding contact seat is arranged at the upper end of the isolation middle contact seat, so that the isolation middle contact seat and the three-station contact seat can be grounded simultaneously or separately.
Drawings
Fig. 1 is a schematic structural diagram (during closing) of a three-position isolating grounding switch of the present invention;
fig. 2 is a schematic structural diagram (during opening) of a three-position isolating grounding switch of the present invention;
fig. 3 is a schematic structural diagram (in the case of grounding) of a three-position isolating grounding switch of the present invention;
fig. 4 is a cross-sectional view a-a of fig. 1, 2 or 3.
Detailed Description
The following describes a specific embodiment of a three-position isolating grounding switch according to the present invention with reference to the embodiments shown in fig. 1 to 4. The utility model discloses a three station isolation earthing switch is not limited to the description of following embodiment.
A three-station isolation grounding switch comprises a shell 1 and an operating mechanism 2, wherein a plurality of sequentially communicated sealing cavities 3 are arranged in the shell 1, a group of fracture switching devices driven by the operating mechanism 2 is arranged in each sealing cavity 3, each group of fracture switching devices comprises a contact mechanism and a moving contact mechanism, the contact mechanism is fixedly arranged in the sealing cavity 3, and a guide channel 5a for the moving contact mechanism to move is arranged on the contact mechanism; the contact mechanism comprises an isolation static contact seat 51, an isolation middle contact seat 52, a three-station contact seat 53 and a grounding static contact seat 54 which are sequentially arranged at intervals, wherein a gap between the isolation static contact seat 51 and the isolation middle contact seat 52 is used as a first isolation fracture I, a gap between the isolation middle contact seat 52 and the three-station contact seat 53 is used as a second isolation fracture II, and a gap between the three-station contact seat 53 and the grounding static contact seat 54 is used as a grounding fracture III; the moving contact mechanism comprises an isolation moving contact 41, an insulating part 42 and a three-station moving contact 43, the moving contact mechanism is driven by the operating mechanism 2 to do reciprocating motion along a straight line in a guide channel 5a, a first isolation fracture I is conducted when the isolation moving contact 41 is matched with an isolation static contact seat 51, a second isolation fracture II is conducted when the three-station moving contact 43 is matched with a three-station contact seat 53, a grounding fracture III is conducted when the three-station moving contact 43 is matched with a grounding static contact seat 54, and the insulating part 42 serving as a mechanical locking device of the moving contact mechanism can not conduct any one of the first isolation fracture I, the second isolation fracture II and the grounding fracture III when the moving contact mechanism moves.
The utility model discloses a three-station isolation earthing switch sets up insulating part 42 as mechanical shutting at moving contact mechanism, in moving contact mechanism motion process, when needs make the second keep apart fracture II and keep insulating, insulating part 42 keeps insulating as the mechanical blocking device of moving contact mechanism can be located the second and keeps apart fracture II and make the second keep apart fracture II in the fracture II, prevents that moving contact mechanism from getting into the second at the removal in-process mistake and keeping apart fracture II and appearing the malfunction.
As shown in fig. 1-4, a three-position isolation grounding switch comprises a housing 1 and an operating mechanism 2, wherein a plurality of sequentially communicated sealed chambers 3 are arranged in the housing 1, a group of fracture switching devices driven by the operating mechanism 2 is arranged in each sealed chamber 3, each group of fracture switching devices comprises a contact mechanism and a moving contact mechanism, the contact mechanism is fixedly arranged in the sealed chamber 3, and a guide channel 5a for the moving contact mechanism to move is arranged on the contact mechanism; the contact mechanism comprises an isolation static contact seat 51, an isolation middle contact seat 52, a three-station contact seat 53 and a grounding static contact seat 54 which are sequentially arranged at intervals, wherein a gap between the isolation static contact seat 51 and the isolation middle contact seat 52 is used as a first isolation fracture I, a gap between the isolation middle contact seat 52 and the three-station contact seat 53 is used as a second isolation fracture II, and a gap between the three-station contact seat 53 and the grounding static contact seat 54 is used as a grounding fracture III; the moving contact mechanism comprises an isolating moving contact 41, an insulating part 42 and a three-station moving contact 43, the moving contact mechanism is driven by the operating mechanism 2 to do reciprocating motion along a straight line in a guide channel 5a, a first isolating fracture I is conducted when the isolating moving contact 41 is matched with an isolating static contact seat 51, a second isolating fracture II is conducted when the three-station moving contact 43 is matched with the three-station contact seat 53, a grounding fracture III is conducted when the three-station moving contact 43 is matched with a grounding static contact seat 54, and when the second isolating fracture II needs to be kept insulating, the insulating part 42 serving as a mechanical locking device of the moving contact mechanism can be located in the second isolating fracture II to enable the second isolating fracture II to be kept insulating.
As shown in fig. 1, when a closing signal is received, the operating mechanism 2 drives the moving contact mechanism to move toward a direction close to the isolated stationary contact seat 51, the isolated moving contact 41 is matched with the isolated stationary contact seat 51, at this time, two ends of the isolated moving contact 41 stride across the first isolation fracture I to enable the first isolation fracture I to be conducted, the three-station moving contact 43 is matched with the three-station contact seat 53, at this time, two ends of the three-station moving contact 43 stride across the second isolation fracture II to enable the second isolation fracture II to be conducted, and the grounding fracture III is disconnected to keep insulation.
As shown in fig. 2, when an isolation signal is received, the operating mechanism 2 drives the moving contact mechanism to move in a direction away from the isolation stationary contact seat 51, the isolation moving contact 41 is disengaged from the isolation stationary contact seat 51 to insulate the first isolation break I, at this time, the isolation moving contact 41 cannot completely cross the first isolation break I, the three-station moving contact 43 is disengaged from the second isolation break II to insulate the second isolation break II, at this time, two ends of the three-station moving contact 43 do not simultaneously contact with the isolation intermediate contact seat 52 and the three-station contact seat 53, the insulating member 42 is located in the second isolation break II to keep the second isolation break II insulated, and the ground break III is insulated.
As shown in fig. 3, when receiving a ground signal, the operating mechanism 2 drives the moving contact mechanism to move toward the grounded stationary contact 54, the first isolation break I maintains insulation, the insulating member 42 maintains insulation of the second isolation break II, at this time, two ends of the insulating member 42 cross over the second isolation break II, and the three-position moving contact 43 cooperates with the grounded stationary contact 54 to conduct the grounded break III.
As shown in fig. 1 to 4, the isolation stationary contact seat 51 and the grounding stationary contact seat 54 are respectively disposed at two ends of the sealed chamber 3, and centers of the isolation stationary contact seat 51, the isolation intermediate contact seat 52, the three-position contact seat 53 and the grounding stationary contact seat 54 are collinear, and the isolation stationary contact seat 51 and the grounding stationary contact seat 54 are respectively disposed at two ends of the sealed chamber 3, and centers of the isolation stationary contact seat 51, the isolation intermediate contact seat 52, the three-position contact seat 53 and the grounding stationary contact seat 54 are collinear. Preferably, the moving contact mechanism is rod-shaped as a whole, the isolating moving contact 41, the insulating member 42 and the three-position moving contact 43 are rod-shaped and connected together in sequence, and the central axis of the moving contact mechanism coincides with the central axis of the guide channel 5 a. Further, the length of the movable contact mechanism is preferably smaller than the distance between the isolated stationary contact 51 and the grounded stationary contact 54, and the movable contact mechanism is driven by the operating mechanism 2 to reciprocate linearly between the isolated stationary contact 51 and the grounded stationary contact 54. The isolating moving contact 41 moves between the isolating fixed contact seat 51 and the isolating middle contact seat 52 to enable the first isolating fracture I to be conducted or insulated, the insulating part 42 moves between the isolating middle contact seat 52 and the three-station contact seat 53 to enable the second isolating fracture II to be located in the second isolating fracture II when the second isolating fracture II needs to be kept insulated, and the three-station moving contact 43 moves among the isolating middle contact seat 52, the three-station contact seat 53 and the grounding fixed contact seat 54 to enable the second isolating fracture II to be conducted or insulated and enable the grounding fracture III to be conducted or insulated.
Preferably, the guide channel 5a penetrates through the middle of the middle isolation contact seat 52 and the middle of the three-position contact seat 53, the part of the guide channel 5a in the middle isolation contact seat 52 is a first movable interval, and the part of the guide channel 5a in the three-position contact seat 53 is a second movable interval; the length of the isolation moving contact 41 is greater than the distance between the first isolation fractures I and smaller than the first movable interval; the length of the three-station moving contact 43 is greater than the distance between the second isolation fracture II and the distance between the grounding fractures III and is less than or equal to the second moving interval; the length of the insulating member 42 is greater than or equal to the distance of the second isolation fracture II and less than or equal to the first interval, the insulating member 42 is preferably formed by casting epoxy resin, and metal joints are arranged at two ends of the insulating member 42 and used for being connected with the isolation moving contact 41 and the three-station moving contact 43. It should be noted that the isolation moving contact 41 and the three-position moving contact 42 are made of metal materials.
The operating mechanism 2 includes an insulating pull rod 6 (see fig. 4), the insulating pull rod 6 extends into the three-position contact base 53, a driving gear 61 for driving the moving contact mechanism is sleeved on the insulating pull rod 6, preferably, a driven rack 44 meshed with the driving gear 61 is arranged on the three-position moving contact 43, and under the matching of the driven rack 44 and the driving gear 61, the three-position moving contact 43 drives the moving contact mechanism to reciprocate along a straight line in the guide channel 5 a.
An arc striking contact is arranged in the isolation static contact seat 51, one end of the isolation static contact seat matched with the isolation moving contact 41 is in a petal-shaped structure, specifically, a cylindrical copper-tungsten piece is arranged at the end part of the arc striking contact, and the end part of the copper-tungsten piece is in a petal-shaped structure and is used for being matched with the isolation moving contact 41; a self-force contact finger and a shielding case 55 are arranged on one side of the isolation middle contact seat 52 close to the second isolation fracture II, the shielding case 55 is sleeved outside the self-force contact finger, an arc striking piece is arranged between the self-force contact finger and the shielding case 55, and the arc striking piece arranged between the self-force contact finger and the shielding case 55 is fixed through sintering; an arc striking piece is arranged at one end of the three-position moving contact 43, which is used for being matched with the three-position contact seat 53 and the grounding contact seat 81, and the arc striking piece arranged on the three-position moving contact 43 is made of metal tungsten into a hollow tube shape and is fixed at one end of the three-position moving contact 43 through a bolt.
The upper end of the middle isolation contact seat 52 is provided with a grounding contact seat 81, specifically, the grounding contact seat 81 can be fixed on the middle isolation contact seat 52 through a bolt, a grounding moving contact 82 is arranged above the grounding contact seat 81, the grounding moving contact 82 is positioned outside the sealed chamber 3, the grounding moving contact 82 penetrates through the shell 1 to move downwards to be matched with the grounding contact seat 81 to enable the middle isolation contact seat 52 to be grounded, and thus the three-station contact seat 53 and the middle isolation contact seat 52 can be grounded simultaneously or respectively and independently. It should be noted that the grounding contact block 81 and the grounding stationary contact block 54 are the same in nature, but one belongs to the isolated stationary contact block and the other belongs to the grounding switch stationary contact block.
A supporting insulator 92 is arranged in the sealed cavity 3, the isolation middle contact seat 52 is installed on the supporting insulator 92, the isolation static contact seat 51 and the three-station contact seat 53 are respectively supported on the two insulation basins 91, and the positions of the isolation static contact seat 51, the isolation middle contact seat 52 and the three-station contact seat 53 are adjusted under the action of the insulation basins 91 and the supporting insulator 92, so that the centers of the isolation static contact seat 51, the isolation middle contact seat 52, the three-station contact seat 53 and the grounding static contact seat 54 are collinear.
An adsorption device 93 is installed in the sealed chamber 3 for adsorbing a trace amount of moisture and impurities in the sealed chamber 3.
The isolation static contact seat 51 is connected with a grounding insulator 94, the grounding insulator 94 penetrates through the shell 1 and extends out of the sealing cavity 3, the grounding insulator 94 is provided with a grounding copper bar 95, one end of the grounding copper bar 95 is connected with the grounding insulator 94, and the other end of the grounding copper bar is connected to the shell 1.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (13)
1. The utility model provides a three-station isolation earthing switch, includes casing (1) and operating device (2), is provided with a plurality of sealed cavity (3) that communicate in proper order in casing (1), is provided with a set of fracture switching device by operating device (2) driven in every sealed cavity (3), its characterized in that: each group of fracture switch devices comprises a contact mechanism and a moving contact mechanism, the contact mechanism is fixedly arranged in the sealed cavity (3), and a guide channel (5a) for the moving contact mechanism to move is arranged on the contact mechanism; the contact mechanism comprises an isolation static contact seat (51), an isolation middle contact seat (52), a three-station contact seat (53) and a grounding static contact seat (54) which are sequentially arranged at intervals, wherein a gap between the isolation static contact seat (51) and the isolation middle contact seat (52) is used as a first isolation fracture (I), a gap between the isolation middle contact seat (52) and the three-station contact seat (53) is used as a second isolation fracture (II), and a gap between the three-station contact seat (53) and the grounding static contact seat (54) is used as a grounding fracture (III); the moving contact mechanism comprises an isolating moving contact (41), an insulating part (42) and a three-station moving contact (43), the moving contact mechanism is driven by an operating mechanism (2) to do reciprocating motion in a guide channel (5a) along a straight line, a first isolating fracture (I) is conducted when the isolating moving contact (41) is matched with an isolating static contact seat (51), a second isolating fracture (II) is conducted when the three-station moving contact (43) is matched with a three-station contact seat (53), a grounding fracture (III) is conducted when the three-station moving contact (43) is matched with a grounding static contact seat (54), and when the second isolating fracture (II) needs to keep insulation, the insulating part (42) serving as a mechanical locking device of the moving contact mechanism can be located in the second isolating fracture (II) to enable the second isolating fracture (II) to keep insulation.
2. The three-position isolating grounding switch of claim 1, wherein: when a closing signal is received, the operating mechanism (2) drives the moving contact mechanism to move towards the direction close to the isolation static contact seat (51), the isolation moving contact (41) is matched with the isolation static contact seat (51) to enable the first isolation fracture (I) to be conducted, the three-station moving contact (43) is matched with the three-station contact seat (53) to enable the second isolation fracture (II) to be conducted, and the grounding fracture (III) keeps insulation;
when an isolation signal is received, the operating mechanism (2) drives the moving contact mechanism to move towards the direction far away from the isolation static contact seat (51), the isolation moving contact (41) is disengaged from the isolation static contact seat (51) to enable the first isolation fracture (I) to be insulated, the three-station moving contact (43) is disengaged from the second isolation fracture (II) to enable the second fracture to be insulated, the insulating piece (42) is located in the second isolation fracture (II) to enable the second isolation fracture (II) to be insulated, and the grounding fracture (III) is insulated;
when receiving a grounding signal, the operating mechanism (2) drives the moving contact mechanism to move towards the direction of the grounding static contact seat (54), the first isolation fracture (I) keeps insulation, the insulation piece (42) enables the second isolation fracture (II) to keep insulation, and the three-station moving contact (43) is matched with the grounding static contact seat (54) to enable the grounding fracture (III) to be conducted.
3. The three-position isolating grounding switch of claim 1, wherein: the isolation static contact seat (51) and the grounding static contact seat (54) are respectively arranged at two ends of the sealed cavity (3), the centers of the isolation static contact seat (51), the isolation middle contact seat (52), the three-position contact seat (53) and the grounding static contact seat (54) are collinear, and the moving contact mechanism is driven by the operating mechanism (2) to reciprocate between the isolation static contact seat (51) and the grounding static contact seat (54) along a straight line.
4. The three-position isolating grounding switch of claim 1, wherein: the isolation moving contact (41) moves between an isolation static contact seat (51) and an isolation middle contact seat (52), the insulating part (42) moves between the isolation middle contact seat (52) and a three-station contact seat (53), and the three-station moving contact (43) moves between the isolation middle contact seat (52), the three-station contact seat (53) and a grounding static contact seat (54).
5. The three-position isolating grounding switch of claim 1, wherein: the isolation moving contact (41), the insulating part (42) and the three-station moving contact (43) are all rod-shaped and are sequentially connected to form a rod body which is coincident with the central axis of the guide channel (5 a).
6. A three-position isolating grounding switch according to any of claims 1 to 5, characterized in that: the guide channel (5a) penetrates through the middle of the middle contact seat (52) and the middle of the three-station contact seat (53), the part of the guide channel (5a) on the middle contact seat (52) is a first movable interval, and the part of the guide channel (5a) on the three-station contact seat (53) is a second movable interval;
the length of the isolation moving contact (41) is greater than the distance between the first isolation fractures (I) and smaller than a first movable interval;
the length of the three-station moving contact (43) is greater than the distance between the second isolation fracture (II) and the distance between the grounding fractures (III), and is less than or equal to the second movable interval;
the length of the insulating part (42) is greater than or equal to the distance of the second isolation fracture (II) and less than or equal to the first interval.
7. The three-position isolating grounding switch of claim 1, wherein: the insulating part (42) is formed by pouring epoxy resin, and metal joints are arranged at two ends of the insulating part (42) and are used for being connected with the isolation moving contact (41) and the three-station moving contact (43).
8. The three-position isolating grounding switch of claim 1, wherein: the operating mechanism (2) comprises an insulating pull rod (6), the insulating pull rod (6) extends into the three-station contact base (53), a driving gear (61) for driving the moving contact mechanism is sleeved on the insulating pull rod (6), and a driven rack (44) meshed with the driving gear (61) is arranged on the three-station moving contact (43); under the matching of the driven rack (44) and the driving gear (61), the three-station moving contact (43) drives the moving contact mechanism to do reciprocating motion along a straight line in the guide channel (5 a).
9. The three-position isolating grounding switch of claim 1, wherein: an arc striking contact is arranged in the isolation static contact seat (51), and one end of the arc striking contact, which is matched with the isolation moving contact (41), is of a petal-shaped structure; a self-force contact finger and a shielding cover (55) are arranged on one side of the isolation middle contact seat (52) close to the second isolation fracture (II), the shielding cover (55) is sleeved outside the self-force contact finger, and an arc striking piece is arranged between the self-force contact finger and the shielding cover (55); an arc striking piece is arranged at one end of the three-position moving contact (43) which is used for being matched with the three-position contact seat (53) and the grounding contact seat (81).
10. The three-position isolating grounding switch of claim 1, wherein: the upper end of the isolation middle contact seat (52) is provided with a grounding contact seat (81), a grounding moving contact (82) is arranged above the grounding contact seat (81), and the grounding moving contact (82) moves downwards to be matched with the grounding contact seat (81) to enable the isolation middle contact seat (52) to be grounded.
11. The three-position isolating grounding switch of claim 1, wherein: a supporting insulator (92) is arranged in the sealed cavity (3), the isolation middle contact seat (52) is installed on the supporting insulator (92), and the isolation static contact seat (51) and the three-station contact seat (53) are respectively supported on the two insulating basins (91).
12. The three-position isolating grounding switch of claim 1, wherein: an adsorption device (93) is arranged in the sealed chamber (3).
13. The three-position isolating grounding switch of claim 1, wherein: the isolation static contact seat (51) is connected with a grounding insulator (94), the grounding insulator (94) penetrates through the shell (1) and extends out of the sealing cavity (3), the grounding insulator (94) is provided with a grounding copper bar (95), one end of the grounding copper bar (95) is connected with the grounding insulator (94), and the other end of the grounding copper bar is connected to the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020204091.1U CN211182064U (en) | 2020-02-24 | 2020-02-24 | Three-station isolation grounding switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020204091.1U CN211182064U (en) | 2020-02-24 | 2020-02-24 | Three-station isolation grounding switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211182064U true CN211182064U (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020204091.1U Active CN211182064U (en) | 2020-02-24 | 2020-02-24 | Three-station isolation grounding switch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112466701A (en) * | 2020-11-13 | 2021-03-09 | 许继（厦门）智能电力设备股份有限公司 | Double-fracture linkage type three-station isolation grounding switch structure |
| CN113035627A (en) * | 2021-03-29 | 2021-06-25 | 山东泰开电力开关有限公司 | Single box-separating type linear three-position switch structure and using method thereof |
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2020
- 2020-02-24 CN CN202020204091.1U patent/CN211182064U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112466701A (en) * | 2020-11-13 | 2021-03-09 | 许继（厦门）智能电力设备股份有限公司 | Double-fracture linkage type three-station isolation grounding switch structure |
| CN112466701B (en) * | 2020-11-13 | 2024-03-26 | 许继（厦门）智能电力设备股份有限公司 | Double-break linkage type three-station isolation grounding switch structure |
| CN113035627A (en) * | 2021-03-29 | 2021-06-25 | 山东泰开电力开关有限公司 | Single box-separating type linear three-position switch structure and using method thereof |
| CN113035627B (en) * | 2021-03-29 | 2023-12-29 | 山东泰开电力开关有限公司 | Single-body split-box type linear three-position switch structure and use method thereof |
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