CN110581035A - Interlocking mechanism for switch cabinet in power system - Google Patents
Interlocking mechanism for switch cabinet in power system Download PDFInfo
- Publication number
- CN110581035A CN110581035A CN201810594181.3A CN201810594181A CN110581035A CN 110581035 A CN110581035 A CN 110581035A CN 201810594181 A CN201810594181 A CN 201810594181A CN 110581035 A CN110581035 A CN 110581035A
- Authority
- CN
- China
- Prior art keywords
- operating shaft
- circuit breaker
- switch operating
- operating
- isolating switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
-
- 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
- H01H2009/265—Interlocking, locking, or latching mechanisms for interlocking two or more switches with interlocking of more than two switches
Abstract
the invention discloses an interlocking mechanism for a switch cabinet in an electric power system, which comprises a mechanism box body, an isolating switch operating shaft, a grounding switch operating shaft, a circuit breaker operating shaft and a circuit breaker electromagnetic operating mechanism, wherein the front ends of the isolating switch operating shaft and the grounding switch operating shaft are provided with operating holes, the circuit breaker operating shaft is positioned on the right side of the isolating switch operating shaft, a guide plate is fixedly arranged on a front side plate of the mechanism box and covers the operating holes of the isolating switch operating shaft and the grounding switch operating shaft, the left side and the right side of the guide plate are provided with elongated guide holes, a baffle is arranged in the guide holes, one end of the baffle is also fixedly connected with a pull plate, and the other end of the pull plate is connected with the circuit breaker operating. The baffle is arranged on the operating holes of the disconnecting switch and the grounding switch, and the baffle controls the baffle to move left and right through the rotation of the operating shaft of the circuit breaker. The interlocking mechanism has the advantages of simple structure, reliable connection and convenient popularization and implementation.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to an interlocking mechanism for a switch cabinet in a power system.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition for a predetermined time. The circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to the application range, the high-voltage and low-voltage boundary lines are relatively vague, and the circuit breakers above 3kV are generally called high-voltage electric appliances. The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, and automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, and the function of the circuit breaker is equivalent to the combination of a fuse type switch, an over-under-heat relay and the like. Furthermore, no parts need to be changed after breaking the fault current. At present, it has been widely used. Distribution of electricity is an extremely important link in the generation, transmission and use of electricity.
The high-voltage isolating switch is an important switching device in an electric system of a power plant and a transformer substation and needs to be matched with a high-voltage circuit breaker for use. The isolating switch is suitable for indoor devices with three-phase alternating current of 50Hz and rated voltage of 12 KV. For switching on, switching off or switching the line in the case of a voltage-loaded train of high-voltage equipment.
The main functions are as follows: the safety of the high-voltage electrical appliance and the device during maintenance work is ensured, the voltage isolation function is realized, the high-voltage electrical appliance and the device cannot be used for cutting off, inputting load current and cutting off short-circuit current, and only can be used for certain switching operation without generating strong electric arcs, namely the high-voltage electrical appliance and the device do not have the arc extinguishing function; the voltage class is divided into an indoor type and an outdoor type according to different installation places, and is divided into a single column type, a double column type and a three column type according to the number of the insulating support columns, and each voltage class is provided with optional equipment. The high-voltage distribution device can also reliably isolate the part needing power failure from the electrified part so as to ensure the safety of maintenance work. The contacts of the high-voltage isolating switch are completely exposed in the air and have obvious disconnection points, the isolating switch is not provided with an arc extinguishing device, and therefore the isolating switch cannot be used for cutting off load current or short-circuit current, otherwise, under the action of high voltage, the disconnection points generate strong electric arcs and are difficult to extinguish by themselves, even flashover (relative ground or interphase short circuit) can be caused, equipment is burnt, and personal safety is endangered, namely, a serious accident of pulling the isolating switch under load is caused.
When the circuit breaker is connected with the disconnecting switch in series, the operation sequence of the circuit breaker and the disconnecting switch is strictly regulated, and when the circuit breaker is disconnected, the circuit breaker is disconnected firstly, and then the disconnecting switch is disconnected under the condition that the circuit breaker is checked and confirmed to be disconnected; when power is transmitted, the isolating switch is firstly closed, and the breaker is closed. In order to strictly operate according to the sequence, an interlocking device between the disconnecting switch and the circuit breaker must be arranged, so that the damage to personal and property safety caused by the failure of equipment is prevented.
Disclosure of Invention
the invention aims to solve the technical problems of complex mechanical interlocking structure, complex transmission process, low safety degree, inconvenient installation and maintenance, high manufacturing cost and the like of the existing isolating switch and the circuit breaker, and aims to provide an interlocking mechanism for a switch cabinet in an electric power system.
The invention is realized by the following technical scheme:
An interlocking mechanism for a switch cabinet in an electric power system comprises a mechanism box body, an isolating switch operating shaft, an earthing switch operating shaft, a circuit breaker operating shaft and a circuit breaker electromagnetic operating mechanism, and is characterized in that the isolating switch operating shaft, the earthing switch operating shaft and the circuit breaker operating shaft are parallelly sleeved on front and rear side plates of the mechanism box body in a penetrating manner, operating holes are formed in the front ends of the isolating switch operating shaft and the earthing switch operating shaft, the isolating switch operating shaft is positioned right above the earthing switch operating shaft, the circuit breaker operating shaft is positioned on the right side of the isolating switch operating shaft, the circuit breaker operating shaft is connected with a push rod of the circuit breaker electromagnetic operating mechanism through a transmission arm, the circuit breaker electromagnetic operating mechanism drives the circuit breaker operating shaft to rotate through the transmission arm, a guide plate is fixedly arranged on the front side plate of the mechanism box, the deflector covers the handle hole of isolator operating axis and earthing switch operating axis, be equipped with two through-holes on the deflector, the through-hole respectively with the handle hole coaxial center of isolator operating axis and earthing switch operating axis, the through-hole is greater than the handle hole of isolator operating axis and earthing switch operating axis, the deflector left and right sides is equipped with rectangular shape guiding hole, be equipped with the baffle in the guiding hole, baffle one end is fixedly connected with arm-tie still, the arm-tie other end pass through the turning arm with circuit breaker operating axis is connected.
according to the optimal scheme, a guide pin is arranged on a front side plate of a mechanism box body, a long hole matched with the guide pin is formed in the middle of a pulling plate, the pulling plate horizontally moves left and right on the guide pin, a cylindrical pin is arranged at the joint of the pulling plate and a connecting lever, the cylindrical pin is perpendicular to the pulling plate, a long circular hole is formed at the joint of the connecting lever and the cylindrical pin of the pulling plate, the cylindrical pin is matched with the long circular hole, a long circular hole matched with a circuit breaker operating shaft is formed in the other end of the connecting lever, and the connecting lever drives the pulling plate to horizontally move left and right through rotation.
According to the preferred scheme, the joints of the isolating switch operating shaft, the grounding switch operating shaft, the circuit breaker operating shaft and the mechanism box body are sleeved with flange outer ring deep groove ball bearings.
compared with the prior art, the invention has the following advantages and beneficial effects: the baffle is arranged on the operation holes of the isolating switch and the grounding switch, and the baffle controls the left and right movement of the baffle through the rotation of the operation shaft of the circuit breaker. The circuit breaker is switched on, the baffle is positioned at the left side, the operation holes of the disconnecting switch and the grounding switch are blocked, and the disconnecting switch and the grounding switch cannot be operated; the breaker is opened, the baffle is located the right side position, and isolator or earthing switch's operating hole is opened, can operate isolator or earthing switch. The interlocking mechanism has the advantages of simple structure, reliable connection, convenient installation and maintenance, convenient inspection, low manufacturing cost, no maintenance and convenient popularization and implementation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
Fig. 1 is a perspective view of a closing state of the circuit breaker according to the present invention;
fig. 2 is a front view of a closing state of the circuit breaker of the present invention;
Fig. 3 is a front view of the circuit breaker of the present invention in an open state.
Reference numbers and corresponding part names in the drawings:
The device comprises a mechanism box body 1, a grounding switch operating shaft 2, a circuit breaker operating shaft 3, a disconnecting switch operating shaft 4, a guide plate 5, a baffle plate 6, a pull plate 7 and a crank arm 8.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Examples
As shown in fig. 1 to 3, the interlocking mechanism for a switch cabinet in an electric power system of the present invention includes a mechanism box 1, an isolating switch operating shaft 4, a grounding switch operating shaft 2, a circuit breaker operating shaft 3, and a circuit breaker electromagnetic operating mechanism, wherein the isolating switch operating shaft 4, the grounding switch operating shaft 2, and the circuit breaker operating shaft 3 are parallelly inserted into mounting holes on front and rear side plates of the mechanism box 1, and operating holes are provided at front ends of the isolating switch operating shaft 4 and the grounding switch operating shaft 2, and the operating holes are used for manually opening and closing the isolating switch and the grounding switch through a handle. Isolator operating shaft 4 is located earthing switch operating shaft 2 directly over, and circuit breaker operating shaft 3 is located isolator operating shaft 4's right side, and circuit breaker operating shaft 3 passes through the transmission arm to be connected with circuit breaker electromagnetism operating structure's push rod, and circuit breaker electromagnetism operating mechanism drives circuit breaker operating shaft 3 through the transmission arm and makes a round trip rotary motion. The circuit breaker is switched on, a push rod of the circuit breaker electromagnetic operating mechanism moves upwards, and the circuit breaker operating shaft rotates clockwise along with the transmission arm by a set angle; the breaker is opened, a push rod of the breaker electromagnetic operating mechanism moves downwards, and the breaker operating shaft rotates anticlockwise along with the transmission arm to set an angle. The electromagnetic operating mechanism of the circuit breaker is not the design point of the invention, and the description is omitted here. The mechanism box body 1 is fixed with guide plate 5 on the preceding curb plate, and isolator operating axis 4 and earthing switch operating axis 2's operation hole is covered completely to guide plate 5, is equipped with two through-holes on the guide plate 5, and two through-holes are coaxial with the operating hole of isolator operating axis 4 and earthing switch operating axis 2 respectively, and the diameter of two through-holes is greater than the operating hole of isolator operating axis 4 and earthing switch operating axis 2, makes things convenient for operating handle to insert the operating hole and carries out the divide-shut brake operation. The left side and the right side of the guide plate 5 are provided with strip-shaped guide holes, baffle plates 6 are arranged in the guide holes, one ends of the baffle plates 6 are fixedly connected with pull plates 7, and the other ends of the pull plates 7 are connected with the circuit breaker operating shaft 3 through crank arms 8. When the circuit breaker is switched on, the circuit breaker operating shaft 3 rotates clockwise by a certain angle, the connecting lever 8 rotates clockwise along with the circuit breaker operating shaft 3, the other end of the connecting lever 8 drives the pull plate 7 to translate leftwards, the pull plate 7 drives the baffle 6 to translate leftwards horizontally to a preset position, so that the operating holes of the disconnecting switch operating shaft 4 and the earthing switch operating shaft 2 are closed, and the circuit breaker is opposite to the moving direction when the circuit breaker is switched off.
According to the preferred embodiment, a guide pin is arranged on a front side plate of a mechanism box body 1, a long hole matched with the guide pin is formed in the middle of a pulling plate 7, the pulling plate 7 moves horizontally on the guide pin, a cylindrical pin is arranged at the joint of the pulling plate 7 and a connecting lever 8 and is perpendicular to the pulling plate 7, a long circular hole is formed at the joint of the connecting lever 8 and the cylindrical pin of the pulling plate 7 and is matched with the long circular hole, a long circular hole matched with the outer circle of a circuit breaker operating shaft 3 is formed in the other end of the connecting lever 8, and the connecting lever 8 drives the pulling plate 7 to horizontally move left and right through rotation.
According to the preferred embodiment, the flange outer ring deep groove ball bearings are sleeved at the joints of the isolating switch operating shaft 4, the grounding switch operating shaft 2, the circuit breaker operating shaft 3 and the mechanism box body 1, and the flange outer ring deep groove ball bearings are used as mounting supports, so that the friction between the isolating switch operating shaft and the mechanism box body 1 is effectively reduced, the operating resistance is reduced, and the stability of the device is improved.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. An interlocking mechanism for a switch cabinet in an electric power system comprises a mechanism box body, an isolating switch operating shaft, an earthing switch operating shaft, a circuit breaker operating shaft and a circuit breaker electromagnetic operating mechanism, and is characterized in that the isolating switch operating shaft, the earthing switch operating shaft and the circuit breaker operating shaft are parallelly sleeved on front and rear side plates of the mechanism box body in a penetrating manner, operating holes are formed in the front ends of the isolating switch operating shaft and the earthing switch operating shaft, the isolating switch operating shaft is positioned right above the earthing switch operating shaft, the circuit breaker operating shaft is positioned on the right side of the isolating switch operating shaft, the circuit breaker operating shaft is connected with a push rod of the circuit breaker electromagnetic operating mechanism through a transmission arm, the circuit breaker electromagnetic operating mechanism drives the circuit breaker operating shaft to rotate through the transmission arm, a guide plate is fixedly arranged on the front side plate of the mechanism box, the deflector covers the handle hole of isolator operating axis and earthing switch operating axis, be equipped with two through-holes on the deflector, the through-hole respectively with the handle hole coaxial center of isolator operating axis and earthing switch operating axis, the through-hole is greater than the handle hole of isolator operating axis and earthing switch operating axis, the deflector left and right sides is equipped with rectangular shape guiding hole, be equipped with the baffle in the guiding hole, baffle one end is fixedly connected with arm-tie still, the arm-tie other end pass through the turning arm with circuit breaker operating axis is connected.
2. The interlocking mechanism for the switch cabinet in the power system as claimed in claim 1, wherein a guide pin is arranged on a front side plate of the mechanism box, a long hole matched with the guide pin is arranged in the middle of the pulling plate, the pulling plate moves horizontally left and right on the guide pin, a cylindrical pin is arranged at the joint of the pulling plate and the crank arm, the cylindrical pin is perpendicular to the pulling plate, a long hole is arranged at the joint of the crank arm and the cylindrical pin of the pulling plate, the cylindrical pin is matched with the long hole, a long hole matched with the operating shaft of the circuit breaker is arranged at the other end of the crank arm, and the crank arm drives the pulling plate to move horizontally left and right through rotation.
3. An interlocking mechanism for a switch cabinet in an electric power system as claimed in claim 1, wherein the joints of the isolating switch operating shaft, the grounding switch operating shaft, the circuit breaker operating shaft and the mechanism box body are sleeved with flange outer ring deep groove ball bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810594181.3A CN110581035A (en) | 2018-06-11 | 2018-06-11 | Interlocking mechanism for switch cabinet in power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810594181.3A CN110581035A (en) | 2018-06-11 | 2018-06-11 | Interlocking mechanism for switch cabinet in power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110581035A true CN110581035A (en) | 2019-12-17 |
Family
ID=68809495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810594181.3A Withdrawn CN110581035A (en) | 2018-06-11 | 2018-06-11 | Interlocking mechanism for switch cabinet in power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110581035A (en) |
-
2018
- 2018-06-11 CN CN201810594181.3A patent/CN110581035A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191217 |
|
| WW01 | Invention patent application withdrawn after publication |