CN109524257B - Interlocking mechanism of integrated switch mechanism - Google Patents
Interlocking mechanism of integrated switch mechanism Download PDFInfo
- Publication number
- CN109524257B CN109524257B CN201811634814.5A CN201811634814A CN109524257B CN 109524257 B CN109524257 B CN 109524257B CN 201811634814 A CN201811634814 A CN 201811634814A CN 109524257 B CN109524257 B CN 109524257B
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- interlocking
- grounding
- switch
- plate
- hole
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
Abstract
The invention relates to an interlocking mechanism of an integrated switch mechanism, which is characterized in that: the interlocking mechanism is combined with the operating mechanism and used for limiting the operation sequence of the arc extinguishing chamber, the isolating switch, the grounding switch and the lower cabinet door; the operating mechanism is provided with a grounding operating hole and an isolating operating hole, the grounding operating hole can penetrate through an operating handle to be used for opening and closing the grounding switch, and the isolating operating hole can penetrate through the operating handle to be used for opening and closing the isolating switch; the interlocking mechanism comprises a lower door interlocking plate, an interlocking top plate, a grounding interlocking plate, a middle interlocking plate and an isolation interlocking plate. Has the advantages of reliable interlocking and convenient operation.
Description
Technical Field
The invention relates to the field of electrical equipment, in particular to a high-voltage switch cabinet.
Background
In an electric power system, a switchgear is widely used as an electric energy distribution device. The main function of a switch gear is to open and close, control and protect electric equipment in the process of generating, transmitting, distributing and converting electric energy of a power system. The components in the switch cabinet mainly comprise a breaker, a disconnecting switch, a load switch, an operating mechanism, a transformer, various protection devices and the like.
The existing switch cabinets are various in structure, and customers continuously put forward new requirements on the design of the switch cabinets. For example, some customers have high requirements on the size of the switch cabinet, and the size of the switch cabinet is required to be smaller than 500x900x1800mm, but various parameters (including temperature rise, safety distance and the like) of each electric element must meet national standards, which brings great difficulty to design. In addition, the structures of the vacuum circuit breaker, the load switch and the cabinet body, such as an insulating cylinder, an insulating crank arm, an isolating knife board and the like in the switch mechanism are required to be improved in structure aiming at the design thought of miniaturization and integration.
In addition, it should be mentioned that the interlocking structure is designed for preventing misoperation of the switch by operators, and is mainly used for personal protection of the switch and operators for operation, maintenance and overhaul. The power transmission operation and the power failure maintenance work are all carried out according to a certain operation program. The design of the interlock is a hard constraint to ensure that the sequence of operations is not overrideable and effective. And the common interlocking structure cannot be applied to a miniaturized and integrated switch cabinet.
Therefore, how to design and improve the structures of the existing vacuum circuit breaker, load switch and cabinet body, in particular the insulating cylinder, insulating crank arm, isolating knife board and the like in the switch mechanism, so that the structure meets the use requirements of a miniaturized and integrated switch cabinet, and the structure is a problem to be solved by the person skilled in the art.
Disclosure of Invention
The invention aims to provide an integrated circuit breaker which is compact in structure, small in size, reliable in interlocking and long in service life.
Another object of the present invention is to provide a miniaturized, safe and reliable switchgear employing the above-mentioned integrated circuit breaker.
The invention aims to provide an integrated load switch which is compact in structure, small in size, reliable in interlocking and long in service life.
Another object of the present invention is to provide a miniaturized, safe and reliable switchgear employing the above-mentioned integrated load switch.
The invention aims to provide an integrated combined electrical appliance which is compact in structure, small in size, reliable in interlocking and long in service life.
Another object of the present invention is to provide a small-sized, safe and reliable switchgear employing the above-mentioned integrated combined electrical apparatus.
In addition, the invention also provides a miniaturized, safe, reliable, convenient and flexible integrated switch cabinet body capable of simultaneously meeting the installation requirements of the integrated circuit breaker, the integrated load switch and the integrated combined electrical appliance.
In addition, the integrated circuit breaker, the integrated load switch and the integrated combined electrical appliance adopt the same interlocking structure, the same isolating blade structure, the same insulating crank arm structure and the same insulating cylinder structure. Thus, the present invention also has the following four objectives:
The first aim of the invention is to provide an interlocking mechanism of an integrated switch mechanism, which is reliable in interlocking and convenient to operate.
The second aim of the invention is to provide the isolation knife board of the integrated switch mechanism, which has reliable contact, small temperature rise and long service life.
The third object of the invention is to provide an insulating cylinder which has small volume, less material consumption and high strength and meets the requirements of creepage distance.
The fourth object of the invention is to provide an insulating crank arm of an integrated switch mechanism, which has high strength, high bearing capacity and small volume.
In order to achieve the above purpose, the invention adopts the following technical scheme: an integrated circuit breaker comprises a chassis, a circuit breaker arc extinguishing chamber, a disconnecting switch, a circuit breaker grounding switch, an operating mechanism, an interlocking mechanism, an insulating cylinder and an insulating crank arm;
the chassis is used for supporting and installing the arc extinguishing chamber of the circuit breaker, the isolating switch, the grounding switch of the circuit breaker, the operating mechanism, the interlocking mechanism, the insulating cylinder and the insulating crank arm, and is also used for being fixedly installed on the switch cabinet body;
the operating mechanism drives the breaker arc extinguish chamber, the isolating switch and the breaker grounding switch to be separated and combined;
The breaker arc extinguishing chamber can break load current and short-circuit current;
the isolating switch is used for isolating the power supply; the isolating switch comprises three groups of isolating blades, each isolating blade comprises four blades, four pressing bolts, pressing nuts, contact springs and a spacer sleeve, the number of the blades is four, the number of the pressing bolts and the number of the pressing nuts are two, the pressing bolts penetrate through two ends of the four blades and are fixed through the pressing nuts, the blades can slide on the pressing bolts, the contact springs are arranged between the two inner side blades, the contact springs are sleeved on the pressing bolts, the contact springs force the two inner side blades to slide outwards, the spacer sleeve is arranged between the inner side blades and the outer side blades, the spacer sleeve is sleeved on the pressing bolts, and the spacer sleeve is used for limiting the minimum distance between the inner side blades and the outer side blades;
the circuit breaker grounding switch is used for switching on and off a grounding wire; the circuit breaker grounding switch comprises a first grounding contact, a first grounding knife, a first rotating shaft, a first pull plate and a first tension spring; the first grounding contact is fixedly arranged at the lower end of the arc extinguish chamber of the circuit breaker, the first grounding knife is fixedly arranged on the first rotating shaft, the first rotating shaft is rotatably arranged on the underframe, the first pull plate is fixedly arranged on the first rotating shaft, and the first tension spring is arranged between the first pull plate and the underframe; the first grounding contact is a columnar contact, the first grounding knife is of a double-knife-plate structure, and the two first tension springs are respectively arranged at two ends of the first pull plate;
The interlocking mechanism is combined with the operating mechanism and used for limiting the operating sequence of the arc extinguishing chamber of the circuit breaker, the disconnecting switch, the grounding switch of the circuit breaker and the lower cabinet door; the operating mechanism is provided with a grounding operating hole and an isolating operating hole, the grounding operating hole can penetrate through an operating handle to be used for opening and closing the circuit breaker grounding switch, and the isolating operating hole can penetrate through the operating handle to be used for opening and closing the isolating switch; the interlocking mechanism comprises a lower door interlocking plate, an interlocking top plate, a grounding interlocking plate, a middle interlocking plate and an isolation interlocking plate; the lower door interlocking plate is fixedly arranged on a lower cabinet door, a lock hole is formed in the lower door interlocking plate along the vertical direction, the interlocking top plate is 7-shaped, the interlocking top plate is hinged to the operating mechanism along the inner and outer directions, two ends of the interlocking top plate can respectively abut against the lower door interlocking plate and the grounding interlocking plate, the grounding interlocking plate is arranged on the operating mechanism in a sliding manner along the vertical direction, a contact protrusion extends inwards from the grounding interlocking plate, the upper end of the interlocking top plate can abut against the contact protrusion, a locking column is arranged below the contact protrusion, the locking column can enter and exit the lock hole, a grounding interlocking tension spring is arranged between the grounding interlocking plate and the operating mechanism, the grounding interlocking tension spring forces the grounding interlocking plate to slide upwards, an intermediate interlocking plate is arranged on the operating mechanism in a sliding manner along the vertical direction, an intermediate interlocking tension spring is arranged between the intermediate interlocking plate and the operating mechanism, the intermediate interlocking tension spring is forced to slide upwards, and the isolation interlocking plate is arranged on the operating mechanism in a sliding manner along the vertical direction; and the two ends of the interlocking top plate are provided with contact wafers.
When the lower cabinet door is opened, the arc extinguish chamber and the isolating switch of the circuit breaker are in a switching-off state, the grounding switch of the circuit breaker is in a switching-on state, and the grounding interlocking plate is at the uppermost end and shields the grounding operation hole under the action of the interlocking tension spring, so that the grounding switch of the circuit breaker is limited to be operated; when the lower cabinet door is closed, the lower door interlocking plate abuts against the lower end of the interlocking top plate, the interlocking top plate is overturned, the upper end of the interlocking top plate abuts against the contact protrusion, so that the grounding interlocking plate slides downwards, the locking column enters the locking hole, the grounding operation hole is opened, and the opening operation of the grounding switch of the circuit breaker can be performed at the moment; the circuit breaker grounding switch is opened, the middle interlocking plate is driven to slide downwards through the operating mechanism until the grounding operating hole and the isolation operating hole are both in an open state, and closing operation of the isolation switch can be performed at the moment; the isolating switch is switched on, the intermediate interlocking plate is driven to slide downwards through the operating mechanism until the intermediate interlocking plate shields the grounding operation hole, the grounding operation hole is limited to be operated, and at the moment, the switching-on operation of the arc extinguishing chamber of the circuit breaker can be carried out; the breaker arc-extinguishing chamber is switched on, and the isolation interlocking plate is driven to slide upwards through the operating mechanism until the isolation interlocking plate shields the isolation operating hole, so that the operation of the isolation switch is limited;
The insulating cylinder is used for insulating protection and is used for installing the arc extinguishing chamber of the circuit breaker and the isolating switch; the insulation cylinder comprises a cylinder body, an extension section and an arch section, wherein the cylinder body is used for installing the arc extinguishing chamber of the circuit breaker, the extension section is arranged above the cylinder body, the arch section is arranged above the extension section, the arch section is in an arch shape, and the arch section is used for installing the isolating switch and allowing the isolating switch to pass through; the lower end of the insulating cylinder is provided with a cylinder hinge hole, the insulating crank arm is hinged in the cylinder hinge hole, a cylinder insert is arranged in the cylinder hinge hole, and a reinforcing rod extends outwards in the diameter direction on the cylinder insert;
the insulating crank arm is used for connecting the breaker explosion chamber with operating device, insulating crank arm is the broken line shape, crank arm hinge hole has been seted up at insulating crank arm both ends, the mounting hole has been seted up in insulating crank arm middle section, insulating crank arm pass through the pivot in the mounting hole pass hinge in the section of thick bamboo hinge hole, set up in the crank arm hinge hole the crank arm inserts, the cover is equipped with the flower piece on the crank arm inserts.
An integrated load switch comprises a chassis, a load switch arc extinguishing chamber, an isolating switch, a load switch grounding switch, an operating mechanism, an interlocking mechanism, an insulating cylinder and an insulating crank arm;
The chassis is used for supporting and installing the arc extinguishing chamber of the circuit breaker, the isolating switch, the load switch grounding switch, the operating mechanism, the interlocking mechanism, the insulating cylinder and the insulating crank arm, and is also used for being fixedly installed on the switch cabinet body;
the operating mechanism drives the load switch arc extinguishing chamber, the isolating switch and the load switch grounding switch to be separated and combined;
the load switch arc extinguishing chamber can cut off load current;
the isolating switch is used for isolating the power supply; the isolating switch comprises three groups of isolating blades, each isolating blade comprises four blades, four pressing bolts, pressing nuts, contact springs and a spacer sleeve, the number of the blades is four, the number of the pressing bolts and the number of the pressing nuts are two, the pressing bolts penetrate through two ends of the four blades and are fixed through the pressing nuts, the blades can slide on the pressing bolts, the contact springs are arranged between the two inner side blades, the contact springs are sleeved on the pressing bolts, the contact springs force the two inner side blades to slide outwards, the spacer sleeve is arranged between the inner side blades and the outer side blades, the spacer sleeve is sleeved on the pressing bolts, and the spacer sleeve is used for limiting the minimum distance between the inner side blades and the outer side blades;
The load switch grounding switch is used for switching on and off a grounding wire; the load switch grounding switch comprises a second grounding contact, a second grounding knife, a second rotating shaft, a second pull plate and a second tension spring; the second grounding contact is fixedly arranged at the lower end of the load switch arc extinguish chamber, the second grounding knife is fixedly arranged on the second rotating shaft, the second rotating shaft is rotatably arranged on the underframe, the second pull plate is fixedly arranged on the second rotating shaft, and the second tension spring is arranged between the second pull plate and the underframe; the second grounding contact is of a claw structure, and the second grounding knife is of a single-knife plate structure;
the interlocking mechanism is combined with the operating mechanism and used for limiting the operation sequence of the load switch arc extinguishing chamber, the isolating switch, the load switch grounding switch and the lower cabinet door; the operating mechanism is provided with a grounding operating hole and an isolating operating hole, the grounding operating hole can penetrate through an operating handle to be used for switching on and off the load switch grounding switch, and the isolating operating hole can penetrate through the operating handle to be used for switching on and off the isolating switch; the interlocking mechanism comprises a lower door interlocking plate, an interlocking top plate, a grounding interlocking plate, a middle interlocking plate and an isolation interlocking plate; the lower door interlocking plate is fixedly arranged on a lower cabinet door, a lock hole is formed in the lower door interlocking plate along the vertical direction, the interlocking top plate is 7-shaped, the interlocking top plate is hinged to the operating mechanism along the inner and outer directions, two ends of the interlocking top plate can respectively abut against the lower door interlocking plate and the grounding interlocking plate, the grounding interlocking plate is arranged on the operating mechanism in a sliding manner along the vertical direction, a contact protrusion extends inwards from the grounding interlocking plate, the upper end of the interlocking top plate can abut against the contact protrusion, a locking column is arranged below the contact protrusion, the locking column can enter and exit the lock hole, a grounding interlocking tension spring is arranged between the grounding interlocking plate and the operating mechanism, the grounding interlocking tension spring forces the grounding interlocking plate to slide upwards, an intermediate interlocking plate is arranged on the operating mechanism in a sliding manner along the vertical direction, an intermediate interlocking tension spring is arranged between the intermediate interlocking plate and the operating mechanism, the intermediate interlocking tension spring is forced to slide upwards, and the isolation interlocking plate is arranged on the operating mechanism in a sliding manner along the vertical direction; and the two ends of the interlocking top plate are provided with contact wafers.
When the lower cabinet door is opened, the load switch arc extinguish chamber and the isolating switch are in a switching-off state, the load switch grounding switch is in a switching-on state, and the grounding interlocking plate is at the uppermost end and shields the grounding operation hole under the action of the interlocking tension spring, so that the load switch grounding switch is limited to be operated; when the lower cabinet door is closed, the lower door interlocking plate abuts against the lower end of the interlocking top plate, the interlocking top plate is overturned, the upper end of the interlocking top plate abuts against the contact protrusion, so that the grounding interlocking plate slides downwards, the locking column enters the locking hole, the grounding operation hole is opened, and the opening operation of the load switch grounding switch can be performed at the moment; the load switch grounding switch is opened, the middle interlocking plate is driven to slide downwards through the operating mechanism until the grounding operating hole and the isolating operating hole are both in an open state, and closing operation of the isolating switch can be performed at the moment; the isolating switch is switched on, the intermediate interlocking plate is driven to slide downwards through the operating mechanism until the intermediate interlocking plate shields the grounding operation hole, the grounding operation hole is limited to be operated, and at the moment, the switching-on operation of the load switch arc extinguishing chamber can be carried out; the load switch arc-extinguishing chamber is switched on, and the isolation interlocking plate is driven to slide upwards through the operating mechanism until the isolation interlocking plate shields the isolation operation hole, so that the isolation switch is limited to be operated;
The insulating cylinder is used for insulating protection and is used for installing the load switch arc extinguishing chamber and the isolating switch; the insulating cylinder comprises a cylinder body, an extension section and an arch section, wherein the cylinder body is used for installing the load switch arc extinguishing chamber, the extension section is arranged above the cylinder body, the arch section is arranged above the extension section, the arch section is in an arch shape, and the arch section is used for installing the isolating switch and allowing the isolating switch to pass through; the lower end of the insulating cylinder is provided with a cylinder hinge hole, the insulating crank arm is hinged in the cylinder hinge hole, a cylinder insert is arranged in the cylinder hinge hole, and a reinforcing rod extends outwards in the diameter direction on the cylinder insert;
the utility model discloses a load switch arc extinguishing chamber, operating device, insulating crank arm, connecting rod hinge hole, mounting hole, connecting rod hinge hole, connecting rod insert and connecting rod insert.
An integrated combined electrical appliance comprises a chassis, a load switch arc extinguish chamber, an isolating switch, a combined electrical appliance grounding switch, an operating mechanism, an interlocking mechanism, an insulating cylinder, an insulating crank arm and a fuse;
The chassis is used for supporting and installing the arc extinguishing chamber of the circuit breaker, the isolating switch, the grounding switch of the combined electrical apparatus, the operating mechanism, the interlocking mechanism, the insulating cylinder and the insulating crank arm, and is also used for being fixedly installed on a switch cabinet body;
the operating mechanism drives the load switch arc extinguish chamber, the isolating switch and the grounding switch of the combined electrical appliance to be separated and combined;
the load switch arc extinguishing chamber can cut off load current;
the fuse is used for switching on and off short-circuit current; the fuse comprises a mounting seat, an insulator and a melting core, wherein the upper end of the mounting seat is fixedly arranged at the lower end of the load switch arc extinguish chamber, the lower end of the mounting seat is fixedly arranged on the underframe through the insulator, and the melting core is clamped on the mounting seat;
the isolating switch is used for isolating the power supply; the isolating switch comprises three groups of isolating blades, each isolating blade comprises four blades, four pressing bolts, pressing nuts, contact springs and a spacer sleeve, the number of the blades is four, the number of the pressing bolts and the number of the pressing nuts are two, the pressing bolts penetrate through two ends of the four blades and are fixed through the pressing nuts, the blades can slide on the pressing bolts, the contact springs are arranged between the two inner side blades, the contact springs are sleeved on the pressing bolts, the contact springs force the two inner side blades to slide outwards, the spacer sleeve is arranged between the inner side blades and the outer side blades, the spacer sleeve is sleeved on the pressing bolts, and the spacer sleeve is used for limiting the minimum distance between the inner side blades and the outer side blades;
The combined electrical appliance grounding switch is used for switching on and switching off a grounding wire; the combined electrical appliance grounding switch comprises a third grounding contact, a third grounding knife, a third rotating shaft, a third pull plate and a third tension spring; the third grounding contact is fixedly arranged at the lower end of the mounting seat, the third grounding knife is fixedly arranged on the third rotating shaft, the third rotating shaft is rotatably arranged on the underframe, the third pull plate is fixedly arranged on the third rotating shaft, and the third tension spring is arranged between the third pull plate and the underframe; the third grounding contact is of a claw structure, the third grounding knife is of a single knife plate structure, and the third grounding knife is clamped into the third grounding contact from top to bottom;
the interlocking mechanism is combined with the operating mechanism and used for limiting the operation sequence of the load switch arc extinguishing chamber, the isolating switch, the grounding switch of the combined electrical appliance and the lower cabinet door; the operating mechanism is provided with a grounding operating hole and an isolating operating hole, the grounding operating hole can penetrate through an operating handle to be used for opening and closing the grounding switch of the combined electrical appliance, and the isolating operating hole can penetrate through the operating handle to be used for opening and closing the isolating switch; the interlocking mechanism comprises a lower door interlocking plate, an interlocking top plate, a grounding interlocking plate, a middle interlocking plate and an isolation interlocking plate; the lower door interlocking plate is fixedly arranged on a lower cabinet door, a lock hole is formed in the lower door interlocking plate along the vertical direction, the interlocking top plate is 7-shaped, the interlocking top plate is hinged to the operating mechanism along the inner and outer directions, two ends of the interlocking top plate can respectively abut against the lower door interlocking plate and the grounding interlocking plate, the grounding interlocking plate is arranged on the operating mechanism in a sliding manner along the vertical direction, a contact protrusion extends inwards from the grounding interlocking plate, the upper end of the interlocking top plate can abut against the contact protrusion, a locking column is arranged below the contact protrusion, the locking column can enter and exit the lock hole, a grounding interlocking tension spring is arranged between the grounding interlocking plate and the operating mechanism, the grounding interlocking tension spring forces the grounding interlocking plate to slide upwards, an intermediate interlocking plate is arranged on the operating mechanism in a sliding manner along the vertical direction, an intermediate interlocking tension spring is arranged between the intermediate interlocking plate and the operating mechanism, the intermediate interlocking tension spring is forced to slide upwards, and the isolation interlocking plate is arranged on the operating mechanism in a sliding manner along the vertical direction; and the two ends of the interlocking top plate are provided with contact wafers.
When the lower cabinet door is opened, the load switch arc extinguish chamber and the isolating switch are in a switching-off state, the grounding switch of the combined electrical appliance is in a switching-on state, and the grounding interlocking plate is at the uppermost end and shields the grounding operation hole under the action of the interlocking tension spring, so that the grounding switch of the combined electrical appliance is limited to be operated; when the lower cabinet door is closed, the lower door interlocking plate abuts against the lower end of the interlocking top plate, the interlocking top plate is overturned, the upper end of the interlocking top plate abuts against the contact protrusion, so that the grounding interlocking plate slides downwards, the locking column enters the locking hole, the grounding operation hole is opened, and the opening operation of the grounding switch of the combined electrical appliance can be performed at the moment; the grounding switch of the combined electrical appliance is opened, the middle interlocking plate is driven to slide downwards through the operating mechanism until the grounding operating hole and the isolation operating hole are both in an open state, and then the closing operation of the isolation switch can be performed; the isolating switch is switched on, the intermediate interlocking plate is driven to slide downwards through the operating mechanism until the intermediate interlocking plate shields the grounding operation hole, the grounding operation hole is limited to be operated, and at the moment, the switching-on operation of the load switch arc extinguishing chamber can be carried out; the load switch arc-extinguishing chamber is switched on, and the isolation interlocking plate is driven to slide upwards through the operating mechanism until the isolation interlocking plate shields the isolation operation hole, so that the isolation switch is limited to be operated;
The insulating cylinder is used for insulating protection and is used for installing the load switch arc extinguishing chamber and the isolating switch; the insulating cylinder comprises a cylinder body, an extension section and an arch section, wherein the cylinder body is used for installing the load switch arc extinguishing chamber, the extension section is arranged above the cylinder body, the arch section is arranged above the extension section, the arch section is in an arch shape, and the arch section is used for installing the isolating switch and allowing the isolating switch to pass through; the lower end of the insulating cylinder is provided with a cylinder hinge hole, the insulating crank arm is hinged in the cylinder hinge hole, a cylinder insert is arranged in the cylinder hinge hole, and a reinforcing rod extends outwards in the diameter direction on the cylinder insert;
the utility model discloses a load switch arc extinguishing chamber, operating device, insulating crank arm, connecting rod hinge hole, mounting hole, connecting rod hinge hole, connecting rod insert and connecting rod insert.
As the same improvement of the three switch mechanisms, the front end of the cutter plate is provided with a deformation groove, the inner side of the front end of the cutter plate is provided with arc-shaped protrusions, and the number of the arc-shaped protrusions is two and the arc-shaped protrusions are positioned on two sides of the deformation groove. The contact springs are arranged between the cutter plate and the compression bolt and between the cutter plate and the compression nut, and the contact springs on two sides force the two cutter plates on the outer sides to slide inwards; a gasket is arranged between the knife plates and the contact springs at two sides. The extension section is provided with a first umbrella skirt which is connected with the umbrella skirt of the cylinder body, and two sides of the arch section are provided with second umbrella skirts; toothed protrusions are arranged on two sides of the reinforcing rod. A crank arm umbrella skirt is arranged between the crank arm hinge holes at the two ends and the mounting hole; a limiting ring is arranged on the outer side of the crank arm insert, and a flower groove is formed in the inner side of the flower piece; the crank arm hinge hole is upwardly offset.
The utility model provides a circuit breaker cubical switchboard, includes the circuit breaker, still includes the cubical switchboard body, goes up cabinet door, lower cabinet door, current transformer, voltage sensor and arrester, go up the cabinet door with lower cabinet door hinge in the cubical switchboard body front side, the circuit breaker fixed set up in the cubical switchboard body left side, current transformer voltage sensor with the arrester fixed set up in the cubical switchboard body right side, the circuit breaker current transformer voltage sensor with connect through the copper bar between the arrester.
The utility model provides a load switch cabinet, includes load switch, still includes the switch cabinet body, goes up cabinet door, lower cabinet door, current transformer, voltage sensor and arrester, go up the cabinet door with lower cabinet door hinge in switch cabinet body front side, load switch fixed set up in switch cabinet body left side, current transformer voltage sensor with the arrester fixed set up in switch cabinet body right side, load switch current transformer voltage sensor with connect through the copper bar between the arrester.
The utility model provides a combined electrical apparatus cubical switchboard, includes the combined electrical apparatus, still includes the cubical switchboard body, goes up cabinet door, lower cabinet door, current transformer, voltage sensor and arrester, go up the cabinet door with lower cabinet door hinge in the cubical switchboard body front side, load switch fixed set up in the cubical switchboard body left side, current transformer voltage sensor with the arrester fixed set up in the cubical switchboard body right side, load switch current transformer voltage sensor with connect through the copper bar between the arrester.
The same switch cabinet body structure of the three switch cabinets has the switch cabinet body height of 1800mm, the switch cabinet body width of 500mm and the switch cabinet body depth of 900mm; the switch cabinet body is divided into a cable chamber, a bus chamber and an instrument chamber, a metal partition plate is arranged between the cable chamber and the bus chamber, a high instrument box is further detachably arranged above the instrument chamber, and a wire penetrating groove is formed between the high instrument box and the instrument chamber. The top of the switch cabinet body is provided with a metal heat radiation plate.
Compared with the prior art, the invention has the advantages that:
1. the switch mechanism (comprising a breaker, a load switch and a combined electrical appliance) +an isolating switch) +a grounding switch is integrally designed, so that the switch installation step is simplified, and the switch mechanism can still perform mechanical characteristic test after being arranged in a switch cabinet body. The three kinds of switch cabinets (including breaker switch cabinets, load switch cabinets and combined electrical appliance switch cabinets) are integrally designed to have the advantages of being environment-friendly, economical, simple, convenient and the like, are easy to intelligent and two-time fusion development, accord with the development trend of a power distribution switch, and have extremely strong market competitiveness.
2. The switch cabinet body has the characteristics of miniaturization and integration, and the size is controlled to be 500x900x1800mm, so that the special requirements of customers are met. In addition, the bus compartment adopts a metal partition plate, so that the PM compartment requirement is met; the distance between the electrified body and the ground is more than 125mm, and when the isolating switch is in the opening state, the distance between the isolating knife board and the ground is still more than 125mm, so that the safety requirement is met. The detachable arrangement of the high instrument box is convenient for transportation and installation, is also beneficial to heat dissipation and meets the temperature rise test requirement; the metal heat radiation plate is used for improving the heat radiation performance of the switch cabinet body and meeting the temperature rise test requirement.
3. The isolation knife plates of the four knife plate structures have larger through-flow capacity, and the heat dissipation area is also increased; the arrangement of the contact springs enables the two knife boards to have larger pressure; the arc-shaped protrusions are arranged in a point contact mode from an original line contact mode, so that contact is more reliable; and the design of deformation groove, the cutting board takes place certain deformation for the arc protruding in both sides can contact in place respectively. The heat generated by the isolating blade plate part can be greatly reduced, so that the isolating blade plate part can meet the requirements of temperature rise tests.
4. Power transmission operation sequence: closing a lower cabinet door, grounding a switch, closing a disconnecting switch and closing an arc extinguishing chamber (comprising a breaker arc extinguishing chamber and a load switch arc extinguishing chamber); and (3) a power failure overhaul operation sequence: the sub-arc extinguishing chamber, the sub-isolating switch, the combined grounding switch and the lower cabinet door are opened; the interlocking mechanism of the scheme can ensure that the equipment can only operate according to the two sequences, and meets the 'five-prevention' interlocking requirement.
5. The insulation cylinder reduces the volume as much as possible on the premise of meeting the safety specification; the design of the integrated insulating cylinder enables the arc extinguishing chamber and the isolating switch to be mounted in an overall mode, and the structure of the integrated insulating cylinder is more compact. Meanwhile, the concrete between the arc extinguishing chamber and the isolating switch can be increased through the arrangement of the extension section, so that the safety of the arc extinguishing chamber is ensured; the designed isolating switch of the arch section is convenient to install and can be separated and combined in a limited space. The arrangement of the first umbrella skirt and the second umbrella skirt can increase the creepage distance. The cylinder hinge hole is internally connected with the insulating crank arm, so that the arc extinguishing chamber can be subjected to extremely large impact force when being opened and closed, and therefore, the cylinder insert is arranged, and the strength of the cylinder hinge hole is ensured; the arrangement of the reinforcing rod increases the contact area between the cylinder insert and the insulating cylinder, so that the cylinder insert is more firmly fixed in the insulating cylinder.
6. The insulating crank arm is in a zigzag structure, so that the front end of the insulating crank arm can extend into the insulating cylinder, and the insulating crank arm can perform opening and closing actions in a limited space; the crank arm hinge holes at the two ends of the insulating crank arm can receive extremely large impact force when the opening and closing are performed, so that the crank arm insert is arranged, and the strength of the crank arm hinge holes is ensured; the flower piece is equivalent to a framework of the hinged part of the insulating crank arm, so that the bearing capacity of the insulating crank arm can be greatly increased, and the strength of the insulating crank arm is ensured; the arrangement of the crank arm umbrella skirt can ensure that the requirements of creepage distance are met; the contact area between the limiting ring and the insulating crank arm can be increased by arranging the limiting ring and the sliding groove, so that the fixing of the insulating crank arm is firmer; because the impact force received by the crank arm during the hinging Kong Gezha is larger, the design of the crank arm hinging holes is less, so that the lower part of the crank arm hinging holes is thicker, and the bearing capacity of the insulating crank arm is increased as much as possible under the condition of limiting the size of the insulating crank arm.
Drawings
FIG. 1 is a schematic perspective view of an interrupt circuit breaker switchgear in accordance with a preferred embodiment of the invention;
FIG. 2 is a rear view of an interrupt circuit breaker switchgear in accordance with a preferred embodiment of the present invention;
FIG. 3 is a side view of an interrupt circuit breaker switchgear in accordance with a preferred embodiment of the present invention;
Fig. 4 is a schematic perspective view of a switch cabinet according to a preferred embodiment of the present invention;
fig. 5 and 6 are perspective views illustrating a structure of an interrupt router according to a preferred embodiment of the present invention; wherein a side view of the circuit breaker grounding switch is also shown in fig. 6;
fig. 7 and 8 are perspective views showing a load switch according to a preferred embodiment of the present invention; wherein a side view of the load switch grounding switch is also shown in fig. 8;
fig. 9 and 10 are perspective views showing a combined electrical apparatus according to a preferred embodiment of the present invention; wherein a side view of the combiner grounding switch is also shown in fig. 10;
FIG. 11 is a schematic perspective view of a spacer blade in accordance with a preferred embodiment of the present invention;
FIG. 12 is an enlarged end view of a spacer blade in accordance with a preferred embodiment of the present invention;
FIG. 13 is an exploded view of a spacer knife according to a preferred embodiment of the present invention;
FIG. 14 is a front view of a knife plate in accordance with a preferred embodiment of the present invention;
FIG. 15 is a schematic perspective view of an insulating crank arm in accordance with a preferred embodiment of the present invention;
FIG. 16 is a schematic view of the internal structure of an insulating crank arm in accordance with a preferred embodiment of the present invention;
FIG. 17 is a schematic perspective view of a flower sheet according to a preferred embodiment of the present invention;
FIG. 18 is a schematic perspective view of a lever insert in accordance with a preferred embodiment of the present invention;
fig. 19 is a schematic perspective view of an insulating cylinder in accordance with a preferred embodiment of the present invention;
FIG. 20 is a schematic perspective view of a cartridge insert in accordance with a preferred embodiment of the present invention;
fig. 21 is a front view of an insulating cylinder in accordance with a preferred embodiment of the present invention;
FIG. 22 is a cross-sectional view taken along the direction A-A in FIG. 21 in accordance with a preferred embodiment of the present invention;
fig. 23 to 27 are schematic views of a state change of the interlock mechanism at the time of the power transmission operation sequence in accordance with a preferred embodiment of the present invention.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.
In the description of the present invention, it should be noted that, for the azimuth words such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present invention and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present invention that the device or element referred to must have a specific azimuth configuration and operation.
As shown in fig. 1 to 6 and fig. 11 to 27, a schematic structural diagram of an interrupt switch cabinet according to a preferred embodiment of the present invention is shown; as shown in fig. 4, 7, 8 and 11 to 27, a load switch cabinet according to a preferred embodiment of the present invention is schematically shown in structure; as shown in fig. 4 and fig. 10 to 27, a switchgear cabinet for a combined electrical appliance according to a preferred embodiment of the present invention is schematically constructed. Since the basic structures of the circuit breaker 100, the load switch 200 and the combined electrical apparatus 300 are the same, the present embodiment will describe the structure of the circuit breaker switch cabinet in detail, and describe the differences between the load switch cabinet, the combined electrical apparatus switch cabinet and the circuit breaker switch cabinet, and the three are the same and will not be repeated.
As shown in fig. 1 to 3, the circuit breaker switch cabinet includes a circuit breaker 100, a switch cabinet body 400, an upper cabinet door 500, a lower cabinet door 600, a current transformer 700, a voltage sensor 800 and a lightning arrester 900, the upper cabinet door 500 and the lower cabinet door 600 are hinged at the front side of the switch cabinet body 400, the circuit breaker 100 is fixedly arranged at the left side of the switch cabinet body 400, the current transformer 700, the voltage sensor 800 and the lightning arrester 900 are fixedly arranged at the right side of the switch cabinet body 400, and the circuit breaker 100, the current transformer 700, the voltage sensor 800 and the lightning arrester 900 are connected through copper bars. The structure and the installation position enable the structure of the switch cabinet to be more compact so as to meet the size requirement.
It should be noted that the above-described switchgear structure is also suitable for installing the load switch 200 and the combined electrical apparatus 300, and the installation positions and installation manners of the load switch 200 and the combined electrical apparatus 300 are the same as those of the circuit breaker 100, and the circuit breaker 100 can be directly replaced.
As shown in fig. 4, the height of the switch cabinet 400 is 1800mm, the width of the switch cabinet 400 is 500mm, and the depth of the switch cabinet 400 is 900mm; the switch cabinet 400 is divided into a cable chamber 401, a bus chamber 402 and an instrument chamber 403, a metal partition 405 is arranged between the cable chamber 401 and the bus chamber 402, a high instrument box 404 is further detachably arranged above the instrument chamber 403, and a wire penetrating groove 4041 is formed between the high instrument box 404 and the instrument chamber 403. A metal heat sink 406 is provided on top of the switchgear body 400.
As shown in fig. 5 and 6, the circuit breaker 100 of the present embodiment includes a chassis 1, a circuit breaker arc extinguishing chamber 2, a disconnector 3, a circuit breaker grounding switch 4, an operating mechanism 5, an interlocking mechanism 6, an insulating cylinder 7, and an insulating crank arm 8. Specific:
the chassis 1 is used for supporting and installing the circuit breaker arc extinguishing chamber 2, the isolating switch 3, the circuit breaker grounding switch 4, the operating mechanism 5, the interlocking mechanism 6, the insulating cylinder 7 and the insulating crank arm 8, and the chassis 1 is also used for being fixedly installed on the switch cabinet body 400.
The operating mechanism 5 drives the breaker arc extinguishing chamber 2, the disconnecting switch 3 and the breaker grounding switch 4 to be separated and combined.
The breaker arc chute 2 can break load current and short circuit current.
The circuit breaker grounding switch 4 is used for switching on and off a grounding wire; the circuit breaker grounding switch 4 comprises a first grounding contact 41, a first grounding knife 42, a first rotating shaft 43, a first pulling plate 44 and a first tension spring 45; the first grounding contact 41 is fixedly arranged at the lower end of the arc extinguishing chamber 2 of the circuit breaker, the first grounding knife 42 is fixedly arranged on the first rotating shaft 43, the first rotating shaft 43 is rotatably arranged on the underframe 1, the first pull plate 44 is fixedly arranged on the first rotating shaft 43, and the first tension spring 45 is arranged between the first pull plate 44 and the underframe 1; the first grounding contacts 41 are columnar contacts, the first grounding knife 42 is of a double-knife-plate structure, and two first tension springs 45 are respectively arranged at two ends of the first pull plate 44. The two first tension springs 45 can increase the operation work of the grounding switch, so that the opening and closing are quicker and more reliable.
As shown in fig. 11 to 14, the isolation switch 3 is used for isolating a power supply; the isolating switch 3 comprises three groups of isolating blades 31, the isolating blades 31 are four blade structures, each group of isolating blades 31 comprises four blades 311, a compression bolt 312, a compression nut 313, a contact spring 314 and a spacer 315, the number of the blades 311 is four, the number of the compression bolts 312 and the number of the compression nuts 313 are two, the compression bolts 312 penetrate through two ends of the four blades and are fixed through the compression nuts 313, the blades 311 can slide on the compression bolts 312, the contact springs 314 are arranged between the two inner blades 311, the contact springs 314 are sleeved on the compression bolts 312, the contact springs 315 force the two inner blades 311 to slide outwards, the spacer 315 is arranged between the inner blades 311 and the outer blades 311, and the spacer 315 is sleeved on the compression bolts 312 and is used for limiting the minimum distance between the inner blades 311 and the outer blades 311. Wherein, deformation groove 3112 has been seted up to cutting board 311 front end, and cutting board 311 front end inboard is provided with arc protruding 3111, and arc protruding 3111 is two, and is located deformation groove 3112 both sides. Contact springs 314 are further arranged between the cutter plates 311 and the compression bolts 312 and between the cutter plates 311 and the compression nuts 313, and the contact springs 314 on two sides force the two cutter plates 311 on the outer sides to slide inwards; a spacer 316 is provided between the blade 311 and the contact spring 314 on both sides.
As shown in fig. 23 to 27, the interlocking mechanism 6 is combined with the operating mechanism 5 for limiting the operation sequence of the breaker arc extinguishing chamber 2, the disconnecting switch 3, the breaker grounding switch 4 and the lower cabinet door 600; the operating mechanism 5 is provided with a grounding operating hole 6a and an isolating operating hole 6b, the grounding operating hole 6a can penetrate through an operating handle for switching the circuit breaker grounding switch 4 (the same applies to the switching of the load switch grounding switch 4 'and the combined electrical appliance grounding switch 4', and the same applies to the following), and the isolating operating hole 6b can penetrate through the operating handle for switching the isolating switch 3; the interlocking mechanism 6 includes a lower door interlocking plate 61, an interlocking top plate 62, a ground interlocking plate 63, an intermediate interlocking plate 64, and an isolation interlocking plate 65; the lower door interlock plate 61 is fixedly arranged on the lower cabinet door 600, the lower door interlock plate 61 is provided with a lock hole 611 along the vertical direction, the interlock top plate 62 is 7-shaped, the interlock top plate 62 is hinged on the operating mechanism 5 along the inner and outer directions, two ends of the interlock top plate 62 can respectively abut against the lower door interlock plate 61 and the grounding interlock plate 63, the grounding interlock plate 63 is slidably arranged on the operating mechanism 5 along the vertical direction, the grounding interlock plate 63 inwards extends to form a contact bulge 631, the upper end of the interlock top plate 62 can abut against the contact bulge 631, a lock post 632 is arranged below the contact bulge 631, the lock post 632 can enter and exit the lock hole 611, a grounding interlock tension spring 633 is arranged between the grounding interlock plate 63 and the operating mechanism 5, the grounding interlock tension spring 633 forces the grounding interlock plate 63 to slide upwards, an intermediate interlock plate 64 is slidably arranged on the operating mechanism 5 along the vertical direction, an intermediate interlock tension spring 641 is arranged between the intermediate interlock plate 64 and the operating mechanism 5, and the isolation interlock plate 65 is slidably arranged on the operating mechanism 5 along the vertical direction. Wherein, the interlocking roof both ends are provided with contact disk 621, contact disk 621 makes the conflict smoother, prevents wearing and tearing and jamming.
The work flow of the interlocking mechanism is as follows: when the lower cabinet door is opened, the arc-extinguishing chamber (the same applies to the arc-extinguishing chamber 2' of the load switch) and the isolating switch are in a switching-off state, the grounding switch of the circuit breaker is in a switching-on state, and the grounding interlocking plate is at the uppermost end and shields the grounding operation hole under the action of the interlocking tension spring, so that the grounding switch of the circuit breaker is limited to be operated; when the lower cabinet door is closed, the lower door interlocking plate abuts against the lower end of the interlocking top plate, the interlocking top plate is overturned, and the upper end of the interlocking top plate abuts against the contact protrusion, so that the grounding interlocking plate slides downwards, the lock column enters the lock hole, the grounding operation hole is opened, and the opening operation of the grounding switch of the circuit breaker can be performed at the moment; the circuit breaker grounding switch is opened, the middle interlocking plate is driven to slide downwards through the operating mechanism until the grounding operating hole and the isolation operating hole are both in an open state, and then the closing operation of the isolation switch can be performed; the isolating switch is switched on, the middle interlocking plate is driven to slide downwards through the operating mechanism until the middle interlocking plate shields the grounding operation hole, the grounding operation hole is limited to be operated, and the switching-on operation of the arc extinguishing chamber of the circuit breaker can be performed at the moment; the breaker explosion chamber is closed, drives the isolation interlocking plate through operating mechanism and upwards slides until the isolation interlocking plate shields the isolation operation hole, and limits to operate the isolating switch.
As shown in fig. 19 to 22, the insulating cylinder 7 is used for insulation protection, and is used for mounting the breaker arc extinguishing chamber 2 and the disconnecting switch 3; the insulating cylinder 7 comprises a cylinder 71, an extension section 72 and an arch section 73, wherein the cylinder 71 is used for installing the arc extinguishing chamber 2 of the circuit breaker, the extension section 72 is arranged above the cylinder 71, the arch section 73 is arranged above the extension section 72, the arch section 73 is in an arch shape, and the arch section 73 is used for installing the isolating switch 3 and allowing the isolating switch 3 to pass through; a cylinder hinge hole 74 is formed in the lower end of the insulating cylinder 7, the insulating crank arm 8 is hinged in the cylinder hinge hole 74, a cylinder insert 75 is arranged in the cylinder hinge hole 74, and a reinforcing rod 751 extends outwards from the cylinder insert 75 along the diameter direction. Wherein, the extension section 72 is provided with a first umbrella skirt 721, the first umbrella skirt 721 is connected with the umbrella skirt of the cylinder 71, and two sides of the arch section 73 are provided with second umbrella skirts 731; toothed protrusions are arranged on two sides of the reinforcing bar 751.
As shown in fig. 15 to 18, the insulating crank arm 8 is used for connecting the breaker arc extinguishing chamber 2 and the operating mechanism 5, the insulating crank arm 8 is in a fold line shape, crank arm hinge holes 81 are formed in two ends of the insulating crank arm 8, a mounting hole 82 is formed in the middle section of the insulating crank arm 8, the insulating crank arm 8 is hinged in the barrel hinge hole 74 by penetrating through a rotating shaft in the mounting hole 82, a crank arm insert 83 is arranged in the crank arm hinge hole 81, and a flower piece 84 is sleeved on the crank arm insert 83. Wherein, a crank arm umbrella skirt 85 is arranged between the crank arm hinging holes 81 and the mounting holes 82 at the two ends; a limiting ring 831 is arranged on the outer side of the crank arm insert 83, and a flower groove 841 is arranged on the inner side of the flower piece 84; the crank arm hinge hole 81 is upwardly offset.
As shown in fig. 7 and 8, the structure of the load switch 200 from different view angles is shown, and the same points of the load switch 200 and the circuit breaker 100 will not be repeated, but the difference is that the load switch arc extinguishing chamber 2 'is adopted in the load switch 200, and the greatest difference between the load switch arc extinguishing chamber 2' and the circuit breaker arc extinguishing chamber 2 is that the load switch arc extinguishing chamber 2 'can only cut off load current, and the price of the load switch arc extinguishing chamber 2' is far lower than that of the circuit breaker arc extinguishing chamber 2, so that the requirements of different customers can be met. The load switch 200 and the circuit breaker 100 are also different from each other in a ground switch, and the load switch 200 employs a load switch ground switch 4'. Specifically, the load switch grounding switch 4' is used for switching on and off a grounding wire; the load switch grounding switch 4 'comprises a second grounding contact 41', a second grounding knife 42', a second rotating shaft 43', a second pulling plate 44 'and a second tension spring 45'; the second grounding contact 41' is fixedly arranged at the lower end of the load switch arc extinguish chamber 2', the second grounding knife 42' is fixedly arranged on the second rotating shaft 43', the second rotating shaft 43' is rotatably arranged on the underframe 1, the second pull plate 44' is fixedly arranged on the second rotating shaft 43', and the second tension spring 45' is arranged between the second pull plate 44' and the underframe 1; the second ground contact 41 'is a claw structure, and the second ground blade 42' is a single blade structure. The load switch grounding switch 4' has the advantages of simple structure and low cost, and is suitable for being used as the grounding switch of the load switch 200. In contrast, the circuit breaker grounding switch 4 has the advantages of reliable contact and firm structure, but is relatively high in price, and is suitable for being applied to the circuit breaker 100 so as to meet the requirements of different customers.
As shown in fig. 9 and 10, the structure of the combined apparatus 300 from different angles of view is shown, and the combined apparatus 300 is added with the fuse 9 on the basis of the load switch 200. Specifically, the fuse 9 is used for switching on and off a short-circuit current; the fuse 9 includes mount pad 91, insulator 92 and melts core 93, and mount pad 91 upper end is fixed to be set up in load switch explosion chamber 2' lower extreme, and the mount pad 91 lower extreme passes through insulator 92 to be fixed to be set up on chassis 1, melts core 93 card and locates on the mount pad 91.
Because of the limitation of the position of the fuse 9, the grounding switch of the combined electrical apparatus 300 needs to be structurally modified, so that the space can be utilized to the maximum extent, and the volume of the combined electrical apparatus 300 is reduced. The combiner grounding switch 4 "therefore comprises a third grounding contact 41", a third grounding knife 42", a third rotary shaft 43", a third pull plate 44 "and a third tension spring 45"; the third grounding contact 41 'is fixedly arranged at the lower end of the mounting seat 91, the third grounding knife 42' is fixedly arranged on the third rotating shaft 43 ', the third rotating shaft 43' is rotatably arranged on the underframe 1, the third pull plate 44 'is fixedly arranged on the third rotating shaft 43', and the third tension spring 45 'is arranged between the third pull plate 44' and the underframe 1; the third grounding contact 41 "is in a claw structure, the third grounding knife 42" is in a single knife plate structure, and the third grounding knife 42 "is clamped into the third grounding contact 41" from top to bottom.
The switch cabinet with the three structures can be selected according to the requirements.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. An interlocking mechanism of an integrated switch mechanism, which is characterized in that: the interlocking mechanism is combined with the operating mechanism and used for limiting the operation sequence of the arc extinguishing chamber, the isolating switch, the grounding switch and the lower cabinet door; the operating mechanism is provided with a grounding operating hole and an isolating operating hole, the grounding operating hole can penetrate through an operating handle to be used for opening and closing the grounding switch, and the isolating operating hole can penetrate through the operating handle to be used for opening and closing the isolating switch; the interlocking mechanism comprises a lower door interlocking plate, an interlocking top plate, a grounding interlocking plate, a middle interlocking plate and an isolation interlocking plate; the lower door interlocking plate is fixedly arranged on a lower cabinet door, a lock hole is formed in the lower door interlocking plate along the vertical direction, the interlocking top plate is 7-shaped, the interlocking top plate is hinged to the operating mechanism along the inner and outer directions, two ends of the interlocking top plate can respectively abut against the lower door interlocking plate and the grounding interlocking plate, the grounding interlocking plate is arranged on the operating mechanism in a sliding manner along the vertical direction, a contact protrusion extends inwards from the grounding interlocking plate, the upper end of the interlocking top plate can abut against the contact protrusion, a locking column is arranged below the contact protrusion, the locking column can enter and exit the lock hole, a grounding interlocking tension spring is arranged between the grounding interlocking plate and the operating mechanism, the grounding interlocking tension spring forces the grounding interlocking plate to slide upwards, an intermediate interlocking plate is arranged on the operating mechanism in a sliding manner along the vertical direction, an intermediate interlocking tension spring is arranged between the intermediate interlocking plate and the operating mechanism, the intermediate interlocking tension spring is forced to slide upwards, and the isolation interlocking plate is arranged on the operating mechanism in a sliding manner along the vertical direction;
When the lower cabinet door is opened, the arc extinguish chamber and the isolating switch are in a switching-off state, the grounding switch is in a switching-on state, and the grounding interlocking plate is at the uppermost end and shields the grounding operation hole under the action of the interlocking tension spring, so that the grounding switch is limited to be operated; when the lower cabinet door is closed, the lower door interlocking plate abuts against the lower end of the interlocking top plate, the interlocking top plate is overturned, the upper end of the interlocking top plate abuts against the contact protrusion, so that the grounding interlocking plate slides downwards, the lock column enters the lock hole, the grounding operation hole is opened, and the opening operation of the grounding switch can be performed at the moment; the grounding switch is opened, the middle interlocking plate is driven to slide downwards through the operating mechanism until the grounding operating hole and the isolation operating hole are both in an open state, and closing operation of the isolation switch can be performed at the moment; the isolating switch is switched on, the intermediate interlocking plate is driven to slide downwards through the operating mechanism until the intermediate interlocking plate shields the grounding operation hole, the grounding operation hole is limited to be operated, and the switching-on operation of the arc extinguishing chamber can be performed at the moment; the arc extinguishing chamber is switched on, and the operation mechanism drives the isolation interlocking plate to slide upwards until the isolation interlocking plate shields the isolation operation hole, so that the isolation switch is limited to be operated.
2. An interlocking mechanism for an integrated switching mechanism as set forth in claim 1 wherein: and two ends of the interlocking top plate are provided with contact wafers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811634814.5A CN109524257B (en) | 2018-12-29 | 2018-12-29 | Interlocking mechanism of integrated switch mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811634814.5A CN109524257B (en) | 2018-12-29 | 2018-12-29 | Interlocking mechanism of integrated switch mechanism |
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| CN109524257A CN109524257A (en) | 2019-03-26 |
| CN109524257B true CN109524257B (en) | 2023-08-29 |
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| CN201811634814.5A Active CN109524257B (en) | 2018-12-29 | 2018-12-29 | Interlocking mechanism of integrated switch mechanism |
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| US11476647B1 (en) * | 2021-04-22 | 2022-10-18 | Rockwell Automation Technologies, Inc. | Maintenance grounding device in motor control center with integrated interlock system |
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| KR101100709B1 (en) * | 2010-06-10 | 2011-12-30 | 엘에스산전 주식회사 | Interlock apparatus for solid insulated switchgear |
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| CN102543511A (en) * | 2010-11-30 | 2012-07-04 | 施耐德电器工业公司 | Interlocking device and electric cabinet with the same |
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| CN109524257A (en) | 2019-03-26 |
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Application publication date: 20190326 Assignee: Ningbo Tianzhi Electric Technology Co.,Ltd. Assignor: NINGBO TIANAN SMART GRID TECHNOLOGY CO.,LTD. Contract record no.: X2023980053427 Denomination of invention: An interlocking mechanism for an integrated switch mechanism Granted publication date: 20230829 License type: Common License Record date: 20231221 |
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