CN104900445A - Torsion spring bouncing-type circuit breaker insulated automatic protection device - Google Patents
Torsion spring bouncing-type circuit breaker insulated automatic protection device Download PDFInfo
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- CN104900445A CN104900445A CN201410803353.5A CN201410803353A CN104900445A CN 104900445 A CN104900445 A CN 104900445A CN 201410803353 A CN201410803353 A CN 201410803353A CN 104900445 A CN104900445 A CN 104900445A
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- fixed pulley
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Abstract
The invention discloses a torsion spring bouncing-type circuit breaker insulated automatic protection device, which belongs to the mechanical field. A lower support is arranged at a static contact end of a switch main body support; a front support is arranged on the lower support; a pilot rope upper fixed pulley and a pilot rope lower fixed pulley are arranged on the upper part and the lower part of the front support respectively; an upper supporting plate is arranged at the upper part of the front support; a protection sleeve rod is arranged at the upper end of the front support; the protection sleeve rod and the upper supporting plate are hinged as a whole via a hinge; the hinge is sleeved with a torsion spring; a static contact protection sleeve is arranged at the head end, corresponding to the static contact position, of the protection sleeve rod; a rope fixing ring is arranged on an operation handle rotation rod; and a rope is arranged, the head end of the rope is fixedly connected with the middle end of the protection sleeve rod, the rope sequentially passes through the pilot rope upper fixed pulley, the upper supporting plate, the pilot rope lower fixed pulley and the main body support, and the tail end of the rope is fixedly wound on the rope fixing ring. A step of removing the protection sleeve and closing the switch and a step of opening the switch and covering the protection sleeve are carried out for achieving automatic protection effects.
Description
Technical field
The invention belongs to mechanical field, particularly relate to a kind of protective device for HVAC vacuum circuit breaker fixed contact.
Background technology
ZW32E-12 type circuit breaker is that applicant is in the intelligent high-voltage alternating-current vacuum circuit breaker on outdoor column of one developed.
This type circuit breaker adopts three-phase solid-sealed pole type structure, vacuum interrupter adopts longitudinal magnetic field blow-out technology, use silicon rubber/epoxy resin solids insulation, adopt the combination of spring operating mechanism and permanent magnet mechanism, make it have the advantages such as volume is little, lightweight, both the long-range divide-shut brake of available controller, also can on the spot or controller without electricity time, emergency manual divide-shut brake.Its permanent magnet mechanism adopts linear transmission mode, effectively can avoid the design defect of the easy clamping stagnation of conventional springs operating mechanism, easy-to-rust, mechanism reliability is significantly promoted.
This type circuit breaker is mainly used in power distribution network and cut-offs load current in electric power system, closes overload and short circuit current.For 10kV system is as dividing, closing load current; the use of the protection of overload current and short circuit current; be applicable to city net or rural power grids as block switch or interconnection switch; also can be used for rural power grids distribution system outdoor substation as outlet switch; can with FTU/ intelligent controller with the use of; as the automatic detection of loop grid segmentation, branch's outlet fault, isolation and warning, the operation of monitoring circuit, has and automatically recovers non-faulting section function of supplying power.After circuit breaker allocating and measuring, protection, control and communication module, distribution automation requirement can be met, be applicable to transformer station and industrial and mining enterprises to protecting in distribution system and controlling, also be applicable to the place of urban distribution network, rural power grids and frequent operation simultaneously.
This type circuit breaker can be divided into is not with isolating switch and band isolating switch two type.For the mounting means of band isolating switch, its incidental isolating switch structure as shown in Figure 1.As seen from the figure, described isolating switch can be divided into moving contact section (being commonly called as brake application) 1 and fixed contact section (being commonly called as lower lock) 2, wherein the end of moving contact section is connected with the leading-out terminal 4 of isolating switch, the stage casing of its moving contact section is connected with the fork 6 on the bull stick 5 being arranged on operating grip 3 through tappet 7, when operating personnel's rotating operation handle, its bull stick drives swing link synchronous to rotate, by driving tappet and then making the head end of moving contact section occur to rise or fall.
When described isolating switch carry out " separating brake " operate time, under the driving of the bull stick of operating grip, the head end (namely what is often called moving contact) of described moving contact section is promoted upwards to lift by tappet, depart from the contact with fixed contact 2-1, realize "off" function, circuit forms an obvious cut-off point; When described isolating switch carries out " combined floodgate " operation, the head end of moving contact section is under the drive of operating grip, and falls downward, contacts with fixed contact, realize " connection " function at circuit, so that the HVAC vacuum circuit breaker connect thereafter carries out " combined floodgate " operation accordingly.
Because this type circuit breaker is outdoor pole-mounted (namely this switch is mounted in outdoor outdoor, and concrete installation form is be arranged on electric pole, therefore in the industry referred to as " Standard type " formula), then its attached isolating switch is also outdoor installation.Due to fixed contact be wherein upward exposed out of doors, very easily accumulate the dust granules in rainwater or air, form spot and fixed contact is formed and corrode, increase its surface contacted resistance, affect its contact effect, when the transmission line running current at place is larger, also can because of the increase of this place's contact resistance and the deterioration contacting effect, caloric value is caused to increase severely, time serious, can because quiet, between moving contact, temperature rise is too high and melting occurs, adhesion, even there is equipment breakdown in the normal work affecting whole switch, cause the interruption of normal power supply, affect the normal operation of power transmission loop or transmission line.
The fixed contact of existing isolating switch, need regularly to carry out clean and anti-oxidation process, increase the line service amount of power supply unit on the one hand, on the other hand, along with being constantly etched of fixed contact and moving contact contact site (contact-making surface), also can increase the contact resistance between dynamic and static contact, bring hidden danger to the safe operation of equipment.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of torsion spring pop-up type circuit breaker insulation automatic safety device; it is provided with an automatic safety device that can protect with harmonious the automatically terminating of switch "ON"/" closing " operational motion and automatically implement to protect on exposed fixed contact; also people are convenient at ground observation; provide effective, the feasible method of circuit breaker insulation protection, reach breaker protection technique effect.
Technical scheme of the present invention is: provide a kind of torsion spring pop-up type circuit breaker insulation automatic safety device, comprise the isolating switch being arranged on circuit breaker end of incoming cables, described isolating switch comprises moving contact section and fixed contact section, in the upper end of fixed contact section, is provided with fixed contact; The end of its moving contact section is connected with the leading-out terminal of isolating switch, and one, the stage casing tappet of its moving contact section is connected with the fork be arranged on operating grip bull stick; When rotating the operating grip of described isolating switch, swing link synchronous described in the bull stick coaxial with described operating grip drives rotates, the end of described fork is that the center of circle is moved as circumference with bull stick, elevating movement done by tappet described in drive, and then make the head end of moving contact section occur to decline or ascending motion, form agreeing with or departing between moving contact section head end and fixed contact, realize circuit " connection " or the "off" function of isolating switch; It is characterized in that:
At the stationary contact of described isolating switch main body rack, a lower carriage is set; Described lower carriage arranges a fore-stock; In the bottom of described fore-stock, under arranging a dragline, fixed pulley is taken turns, and under described dragline, fixed pulley is corresponding with described fore-stock affixed through a lower fixed pulley support; On the top of described fore-stock, arrange fixed pulley on a dragline, on described dragline, fixed pulley is corresponding with described fore-stock affixed through a upper fixed pulley support; On the top of described fore-stock, a upper backup pad is set; In the upper end of described fore-stock, arrange a protection loop bar, described protection loop bar and described upper backup pad are integrated through a hinge; Described hinge is set with a torsion spring; In described protection loop bar head end and corresponding position, described fixed contact position, be provided with a fixed contact protective sleeve; The bull stick of described operating grip arranges a rope retainer ring; On described main body rack and upper backup pad, with the corresponding position, longitudinal axis position of described rope retainer ring, first and the 3rd rope guiding hole are set; One rope is set, the head end of described rope and the middle-end of described protection loop bar affixed, described rope is arranged through the first rope guiding hole on fixed pulley under the 3rd rope guiding hole on fixed pulley, upper backup pad on dragline, dragline and main body rack successively; The end of described rope is wound around and is fixed on described rope retainer ring.
When described operating grip and bull stick thereof rotate counterclockwise, the end of described moving contact section rises, after departing from the contact with described fixed contact, along with the rotation of described operating grip and bull stick thereof, described rope is wound and tightens up, and its fixed contact protective sleeve being positioned at protection loop bar head end declines, and is nested on described fixed contact, to prevent fixed contact directly in exposed environment in the open, it is avoided to be etched or contaminated;
When described operating grip and bull stick thereof rotate clockwise, along with the rotation of described operating grip and bull stick thereof, described rope is released, described protection loop bar end rises under the elastic reset effect of described torsion spring, the fixed contact protective sleeve being positioned at protection loop bar head end rises, the end of described moving contact section declines, described dynamic and static contact normally agrees with, power supply is transported to the end of incoming cables of described circuit breaker through described dynamic and static contact, for " combined floodgate " operation of described circuit breaker provides prerequisite;
Described insulation automatic safety device is by the rotation of described operating grip and bull stick thereof, and the protection loop bar described in the rope described in driving drives and the fixed contact protective sleeve action of head end, for described contact of breaker provides automatic insulation protection function.
Concrete; when described operating grip rotates clockwise around the shaft; described fork rotates clockwise with bull stick; and drive tappet to moving down; described moving contact section rotates counterclockwise and moves down; the rope be now fixed on described rope retainer ring discharges and unclamps in rotating shaft; described protection loop bar is under the effect of torsion spring reset force; protection loop bar is upwards lifted; described protection loop bar rotates clockwise around hinge; leave fixed contact, moving contact section described afterwards moves down and puts in place, agrees with described fixed contact.
Concrete; when described operating grip rotates counterclockwise around the shaft; described fork rotates counterclockwise with bull stick; and drive tappet upwards to move; described moving contact section rotates clockwise and moves up; the rope be now fixed on described rope retainer ring together tightens up with bull stick wrapped anti-clockwise in rotating shaft; protection loop bar pulls down by described protection loop bar under the effect of rope pull; described protection loop bar rotates clockwise around hinge; just in time cover on corresponding fixed contact, insulation protection is carried out to described fixed contact.
Under dragline described in it, fixed pulley is fixed on described lower fixed pulley support through a lower fixed pulley pivot pin; On described dragline, fixed pulley is fixed on described upper fixed pulley support through a upper fixed pulley pivot pin.
It lays respectively at first on described isolating switch main body rack and upper backup pad and the 3rd rope guiding hole, and the longitudinal axis of described upper and lower fixed pulley, is arranged in same fore-and-aft plane, coincides with the fore-and-aft plane at described rope retainer ring place.
The longitudinal axis of the fixed contact protective sleeve described in it, fixed contact and described moving contact section head end, is arranged in same fore-and-aft plane.
Moving contact section described in it, fixed contact, fixed contact protective sleeve, protection loop bar, fore-stock, upper backup pad, rope, upper fixed pulley, lower fixed pulley and rope retainer ring, be arranged in same fore-and-aft plane.
Described insulation automatic safety device can single or multi-joint setting, realizes the Self-resetting insulation protection of single or multi-joint fixed contact.。
Compared with the prior art, advantage of the present invention is:
The technical program have employed " protective sleeve is withdrawn; switch closes a floodgate " and the action step of " switch separating brake; protective sleeve covers "; provide with circuit breaker "ON"/" conjunction " close look at the swing; automatically terminate the insulation automatic safety device of protection and enforcement protection automatically; overcome in the past to the problem that the protection inconvenience of fixed contact is observed, is awkward; also people are convenient at ground observation; provide effective, the feasible method of outdoor type circuit breaker insulation protection, reach the technique effect that circuit breaker is protected automatically.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing disconnector;
Fig. 2 is that the present invention is insulated the side-looking structural representation of automatic safety device;
Fig. 3 be Fig. 2 look up structural representation;
Fig. 4 is that the present invention is insulated the perspective view of automatic safety device.
In figure, 0 is isolating switch main body rack, 1 is moving contact section, 2 is fixed contact section, 2-1 is fixed contact, 3 is operating grip, 4 is the leading-out terminal of isolating switch, 5 is bull stick, 6 is fork, 7 is tappet, 8 is lower carriage, 9 is upper backup pad, 10 is fore-stock, 11A is fixed pulley under dragline, 11B is fixed pulley on dragline, 12A is lower fixed pulley support, 12B is upper fixed pulley support, 14 is protection loop bar, 15 is fixed contact protective sleeve, 16 is rope retainer ring, 17 is rope, 18A is torsion spring, 19 is hinge, 20A is lower fixed pulley pivot pin, 20B is upper fixed pulley pivot pin, A1 is the first rope guiding hole, A3 is the 3rd rope guiding hole.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
In Fig. 1, described isolating switch can be divided into moving contact section (being commonly called as brake application) 1 and fixed contact section (being commonly called as lower lock) 2, wherein the end of moving contact section is connected with the leading-out terminal 4 of isolating switch, the stage casing of its moving contact section is connected with the fork 6 on the bull stick 5 being arranged on operating grip 3 through tappet 7, when operating personnel's rotating operation handle, its bull stick drives swing link synchronous to rotate, by driving tappet and then making the head end of moving contact section occur to rise or fall.
In Fig. 2 to Fig. 4, technical scheme of the present invention provides a kind of torsion spring pop-up type circuit breaker insulation automatic safety device, and comprise the isolating switch being arranged on circuit breaker end of incoming cables, described isolating switch comprises moving contact section and fixed contact section, in the upper end of fixed contact section, be provided with fixed contact; The end of its moving contact section is connected with the leading-out terminal of isolating switch, and one, the stage casing tappet of its moving contact section is connected with the fork be arranged on operating grip bull stick; When rotating the operating grip of described isolating switch, swing link synchronous described in the bull stick coaxial with described operating grip drives rotates, the end of described fork is that the center of circle is moved as circumference with bull stick, elevating movement done by tappet described in drive, and then make the head end of moving contact section occur to decline or ascending motion, form agreeing with or departing between moving contact section head end and fixed contact, realize circuit " connection " or the "off" function of isolating switch.
The inventive point of technical solution of the present invention is: at the stationary contact (being left side or the front end of isolating switch main body rack in figure) of described isolating switch main body rack 0, arrange a lower carriage 8; Described lower carriage arranges a fore-stock 10.
In the bottom of described fore-stock, under arranging a dragline, 11A taken turns by fixed pulley, and under described dragline, fixed pulley is corresponding with described fore-stock affixed through a lower fixed pulley support 12A;
On the top of described fore-stock, arrange fixed pulley 11B on a dragline, on described dragline, fixed pulley is corresponding with described fore-stock affixed through a upper fixed pulley support 12B;
On the top of described fore-stock, a upper backup pad 9 is set;
In the upper end of described fore-stock, arrange a protection loop bar 14, described protection loop bar and described upper backup pad are articulated as one through a hinge 19; Described hinge is set with a torsion spring 18A;
In described protection loop bar head end and corresponding position, described fixed contact position, be provided with a fixed contact protective sleeve 15;
The bull stick of described operating grip arranges a rope retainer ring 16;
On described main body rack and upper backup pad, with the corresponding position, longitudinal axis position of described rope retainer ring, correspondence arranges the first rope guiding hole A1 and the 3rd rope guiding hole A3 respectively;
One rope 17 is set, the head end of described rope and the middle-end of described protection loop bar affixed, described rope is arranged through the first rope guiding hole on fixed pulley under the 3rd rope guiding hole on fixed pulley, upper backup pad on dragline, dragline and main body rack successively; The end of described rope is wound around and is fixed on described rope retainer ring.
Under described dragline, fixed pulley is fixed on described lower fixed pulley support through a lower fixed pulley pivot pin 20A; On described dragline, fixed pulley is fixed on described upper fixed pulley support through a upper fixed pulley pivot pin 20B.
Described moving contact section, fixed contact, fixed contact protective sleeve, protection loop bar, fore-stock, upper backup pad, rope, upper fixed pulley, lower fixed pulley and rope retainer ring, be arranged in same fore-and-aft plane.
Described insulation automatic safety device is by the rotation of described operating grip and bull stick thereof, and the protection loop bar described in the rope described in driving drives and the fixed contact protective sleeve action of head end, for described contact of breaker provides automatic insulation protection function.
When described operating grip rotates clockwise around the shaft; described fork rotates clockwise with bull stick; and drive tappet to moving down; described moving contact section rotates counterclockwise and moves down; the rope be now fixed on described rope retainer ring discharges and unclamps in rotating shaft; described protection loop bar is under the effect of torsion spring reset force; protection loop bar is upwards lifted; described protection loop bar rotates clockwise around hinge; leave fixed contact; moving contact section described afterwards moves down and puts in place, agrees with described fixed contact.
When described operating grip rotates counterclockwise around the shaft; described fork rotates counterclockwise with bull stick; and drive tappet upwards to move; described moving contact section rotates clockwise and moves up; the rope be now fixed on described rope retainer ring together tightens up with bull stick wrapped anti-clockwise in rotating shaft; protection loop bar pulls down by described protection loop bar under the effect of rope pull; described protection loop bar rotates clockwise around hinge; just in time cover on corresponding fixed contact, insulation protection is carried out to described fixed contact.
Described insulation automatic safety device can single or multi-joint setting, realizes the Self-resetting insulation protection of single or multi-joint fixed contact.
By adopting said structure and course of action, technical scheme of the present invention have employed that " protective sleeve is withdrawn, switch closes a floodgate " and " switch separating brake, protective sleeve cover " action step, provide with circuit breaker "ON"/" conjunction " close look at the swing, automatically terminate the insulation automatic safety device of protection and enforcement protection automatically, overcome and the protection inconvenience of fixed contact was observed in the past, the problem be awkward, also be convenient to people observe in the face of whether its action puts in place on ground, provide the effective of circuit breaker insulation protection, feasible method, reach the technique effect that circuit breaker is protected automatically.
The present invention can be widely used in the Design and manufacture field of outdoor type primary cut-out.
Claims (8)
1. a torsion spring pop-up type circuit breaker insulation automatic safety device, comprise the isolating switch being arranged on circuit breaker end of incoming cables, described isolating switch comprises moving contact section and fixed contact section, in the upper end of fixed contact section, is provided with fixed contact; The end of its moving contact section is connected with the leading-out terminal of isolating switch, and one, the stage casing tappet of its moving contact section is connected with the fork be arranged on operating grip bull stick; When rotating the operating grip of described isolating switch, swing link synchronous described in the bull stick coaxial with described operating grip drives rotates, the end of described fork is that the center of circle is moved as circumference with bull stick, elevating movement done by tappet described in drive, and then make the head end of moving contact section occur to decline or ascending motion, form agreeing with or departing between moving contact section head end and fixed contact, realize circuit " connection " or the "off" function of isolating switch; It is characterized in that:
At the stationary contact of described isolating switch main body rack, a lower carriage is set;
Described lower carriage arranges a fore-stock;
In the bottom of described fore-stock, under arranging a dragline, fixed pulley is taken turns, and under described dragline, fixed pulley is corresponding with described fore-stock affixed through a lower fixed pulley support;
On the top of described fore-stock, arrange fixed pulley on a dragline, on described dragline, fixed pulley is corresponding with described fore-stock affixed through a upper fixed pulley support;
On the top of described fore-stock, a upper backup pad is set;
In the upper end of described fore-stock, arrange a protection loop bar, described protection loop bar and described upper backup pad are integrated through a hinge; Described hinge is set with a torsion spring;
In described protection loop bar head end and corresponding position, described fixed contact position, be provided with a fixed contact protective sleeve;
The bull stick of described operating grip arranges a rope retainer ring;
On described main body rack and upper backup pad, with the corresponding position, longitudinal axis position of described rope retainer ring, first and the 3rd rope guiding hole are set;
One rope is set, the head end of described rope and the middle-end of described protection loop bar affixed, described rope is arranged through the first rope guiding hole on fixed pulley under the 3rd rope guiding hole on fixed pulley, upper backup pad on dragline, dragline and main body rack successively;
The end of described rope is wound around and is fixed on described rope retainer ring;
When described operating grip and bull stick thereof rotate counterclockwise, the end of described moving contact section rises, after departing from the contact with described fixed contact, along with the rotation of described operating grip and bull stick thereof, described rope is wound and tightens up, and its fixed contact protective sleeve being positioned at protection loop bar head end declines, and is nested on described fixed contact, to prevent fixed contact directly in exposed environment in the open, it is avoided to be etched or contaminated;
When described operating grip and bull stick thereof rotate clockwise, along with the rotation of described operating grip and bull stick thereof, described rope is released, described protection loop bar end rises under the elastic reset effect of described torsion spring, the fixed contact protective sleeve being positioned at protection loop bar head end rises, the end of described moving contact section declines, described dynamic and static contact normally agrees with, power supply is transported to the end of incoming cables of described circuit breaker through described dynamic and static contact, for " combined floodgate " operation of described circuit breaker provides prerequisite;
Described insulation automatic safety device is by the rotation of described operating grip and bull stick thereof, and the protection loop bar described in the rope described in driving drives and the fixed contact protective sleeve action of head end, for described contact of breaker provides automatic insulation protection function.
2. according to torsion spring pop-up type circuit breaker insulation automatic safety device according to claim 1, it is characterized in that when described operating grip rotates clockwise around the shaft, described fork rotates clockwise with bull stick, and drive tappet to moving down, described moving contact section rotates counterclockwise and moves down, the rope be now fixed on described rope retainer ring discharges and unclamps in rotating shaft, described protection loop bar is under the effect of torsion spring reset force, protection loop bar is upwards lifted, described protection loop bar rotates clockwise around hinge, leave fixed contact, moving contact section described afterwards moves down and puts in place, agree with described fixed contact.
3. according to torsion spring pop-up type circuit breaker insulation automatic safety device according to claim 1, it is characterized in that rotating counterclockwise around the shaft when described operating grip, described fork rotates counterclockwise with bull stick, and drive tappet upwards to move, described moving contact section rotates clockwise and moves up, the rope be now fixed on described rope retainer ring together tightens up with bull stick wrapped anti-clockwise in rotating shaft, protection loop bar pulls down by described protection loop bar under the effect of rope pull, described protection loop bar rotates clockwise around hinge, just in time cover on corresponding fixed contact, insulation protection is carried out to described fixed contact.
4., according to torsion spring pop-up type circuit breaker insulation automatic safety device according to claim 1, under it is characterized in that described dragline, fixed pulley is fixed on described lower fixed pulley support through a lower fixed pulley pivot pin; On described dragline, fixed pulley is fixed on described upper fixed pulley support through a upper fixed pulley pivot pin.
5. according to torsion spring pop-up type circuit breaker insulation automatic safety device according to claim 1; it is characterized in that laying respectively at first on described isolating switch main body rack and upper backup pad and the 3rd rope guiding hole; and the longitudinal axis of described upper and lower fixed pulley; be arranged in same fore-and-aft plane, coincide with the fore-and-aft plane at described rope retainer ring place.
6., according to torsion spring pop-up type circuit breaker insulation automatic safety device according to claim 1, it is characterized in that the longitudinal axis of described fixed contact protective sleeve, fixed contact and described moving contact section head end, be arranged in same fore-and-aft plane.
7. according to torsion spring pop-up type circuit breaker insulation automatic safety device according to claim 1; it is characterized in that described moving contact section, fixed contact, fixed contact protective sleeve, protection loop bar, fore-stock, upper backup pad, rope, upper fixed pulley, lower fixed pulley and rope retainer ring, be arranged in same fore-and-aft plane.
8., according to torsion spring pop-up type circuit breaker according to claim 1 insulation automatic safety device, it is characterized in that described insulation automatic safety device can single or multi-joint setting, realize the Self-resetting insulation protection of single or multi-joint fixed contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410803353.5A CN104900445B (en) | 2014-12-18 | 2014-12-18 | A kind of torsion spring pop-up type breaker insulation automatic safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410803353.5A CN104900445B (en) | 2014-12-18 | 2014-12-18 | A kind of torsion spring pop-up type breaker insulation automatic safety device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104900445A true CN104900445A (en) | 2015-09-09 |
| CN104900445B CN104900445B (en) | 2017-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410803353.5A Active CN104900445B (en) | 2014-12-18 | 2014-12-18 | A kind of torsion spring pop-up type breaker insulation automatic safety device |
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| CN (1) | CN104900445B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112201502A (en) * | 2020-09-30 | 2021-01-08 | 国网安徽省电力有限公司芜湖县供电公司 | Double-knife unit multi-path electric brake device |
| CN114226295A (en) * | 2021-09-28 | 2022-03-25 | 深圳市康宁医院(深圳市精神卫生研究所、深圳市精神卫生中心) | Cleaning device for be used for nuclear magnetic resonance imaging system aperture inner chamber |
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| CN2109629U (en) * | 1991-10-21 | 1992-07-08 | 大庆石油管理局第七采油厂 | Positive device for isolated switch knife |
| JP2005285534A (en) * | 2004-03-30 | 2005-10-13 | Chugoku Electric Power Co Inc:The | Disconnector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112201502A (en) * | 2020-09-30 | 2021-01-08 | 国网安徽省电力有限公司芜湖县供电公司 | Double-knife unit multi-path electric brake device |
| CN114226295A (en) * | 2021-09-28 | 2022-03-25 | 深圳市康宁医院(深圳市精神卫生研究所、深圳市精神卫生中心) | Cleaning device for be used for nuclear magnetic resonance imaging system aperture inner chamber |
| CN114226295B (en) * | 2021-09-28 | 2023-03-14 | 深圳市康宁医院(深圳市精神卫生研究所、深圳市精神卫生中心) | Cleaning device for be used for nuclear magnetic resonance imaging system aperture inner chamber |
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| Publication number | Publication date |
|---|---|
| CN104900445B (en) | 2017-06-13 |
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