CN119049897B - Normally closed switch state switching device of transformer substation - Google Patents
Normally closed switch state switching device of transformer substation Download PDFInfo
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- CN119049897B CN119049897B CN202411554059.5A CN202411554059A CN119049897B CN 119049897 B CN119049897 B CN 119049897B CN 202411554059 A CN202411554059 A CN 202411554059A CN 119049897 B CN119049897 B CN 119049897B
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- normally closed
- closed contact
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- flat plate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/28—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/38—Driving mechanisms, i.e. for transmitting driving force to the contacts using spring or other flexible shaft coupling
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
- Mechanisms For Operating Contacts (AREA)
Abstract
The invention belongs to the technical field of substation switching equipment, and particularly relates to a normally closed switch state switching device of a substation, which comprises an upper flat plate and a lower flat plate, wherein normally closed contact assemblies are arranged on two sides above the upper flat plate, fixed seats are arranged on two sides below the normally closed contact assemblies, and lower limit assemblies for limiting the descending travel of the normally closed contact assemblies are arranged in the upper flat plate, corresponding to the two sides of the normally closed contact assemblies; an insulating shell is arranged at the two sides below the lower flat plate and corresponding to the normally-closed contact assemblies, and normally-closed contact seats which are electrically connected with the normally-closed contact assemblies in a normally-closed mode are arranged in the insulating shell; the outer side of the insulating shell is provided with a guide sleeve, the inside of the guide sleeve is provided with an operating rod, one end of the outer side of the operating rod is connected with a mechanical operating device, and the corresponding operating rod is driven to act through the mechanical operating device to realize the state switching of normally closed electrical connection between the normally closed contact seat and the normally closed contact assembly; the invention has the advantages of stable normally closed state, quick and reliable switching and timely fault expansion avoidance.
Description
Technical Field
The invention belongs to the technical field of substation switching equipment, and particularly relates to a normally-closed switch state switching device of a substation.
Background
Normally closed switches in substations are important components in power systems, play a key role in ensuring the reliability and safety of power supply, are switches in a closed state under the condition of no external force (such as no power-on or no button pressing), and are opened when a certain force or voltage is applied, so that no longer a path exists between two terminals, and the normally closed switches in a double-bus system play a role in controlling equipment switches of electric appliances, machines and the like, such as a bus-bar switch, the bus-bar switch is always in a closed state so as to quickly switch a part of equipment from one bus to the other bus when needed, thereby ensuring the continuity of power supply, when the bus-bar switch is closed, if one bus fails, bus-bar differential protection can quickly act, firstly the bus-bar switch is tripped to cut off a failed bus bar, and the other bus bar is protected to continue to operate, so that the power failure range is reduced, but the conventional normally closed switch device cannot realize a quick and reliable open circuit when detecting equipment abnormality or failure, thereby leading to expansion of the failure and damage of the equipment, and therefore, the normally closed switch in a simple and normally closed state is provided, the normally closed switch in a stable state is necessary.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the normally closed switch state switching device of the transformer substation, which has the advantages of simple structure, stable normally closed state, rapid and reliable switching and timely fault expansion avoidance.
The normally closed switch state switching device of the transformer substation comprises an upper flat plate and a lower flat plate, normally closed contact assemblies are arranged on two sides above the upper flat plate, fixing seats are arranged on two sides below the normally closed contact assemblies, lower limit assemblies used for limiting the descending travel of the normally closed contact assemblies are arranged on two sides, corresponding to the normally closed contact assemblies, of the upper flat plate, insulating shells are arranged on two sides below the lower flat plate, corresponding to the normally closed contact assemblies, normally closed contact seats which are in normally closed electrical connection with the normally closed contact assemblies are arranged inside the insulating shells, guide sleeves are arranged on the outer sides of the insulating shells, operating rods are arranged inside the guide sleeves, one ends of the outer sides of the operating rods are connected with mechanical operating devices, and the mechanical operating devices drive the corresponding operating rods to act so as to realize the state switching of normally closed electrical connection between the normally closed contact seats and the normally closed contact assemblies.
The upper flat plate and the lower flat plate are connected through a plurality of connecting columns, and each connecting column comprises an inner groove positioning column connected with the bottom of the upper flat plate and an outer convex edge positioning column connected with the top of the lower flat plate.
The connecting columns are respectively arranged on the left side, the middle part and the right side between the upper flat plate and the lower flat plate, the inward concave grooves of the inner concave groove positioning columns of the connecting columns are matched and butted with the outward convex ribs of the outer convex rib positioning columns, then the bolts penetrate through the upper flat plate, the connecting columns and the lower flat plate to realize stable connection of the upper flat plate and the lower flat plate, so that the stability of the switch in use is ensured.
The normally closed contact assembly comprises a substrate, arc-shaped parts are arranged on two sides above the substrate, movable plates are arranged below the arc-shaped parts, shaft pins are arranged inside the movable plates, and limiting convex plates are arranged below the inner sides of the movable plates.
The shaft pin and the vertical movable groove are matched to realize up-and-down guiding movement, so that the stable reliability of state switching action of the normally closed contact assembly is ensured, the state switching failure caused by action inclination or jamming is avoided, danger is avoided, the limit convex plate and the lower limit assembly are matched to realize limit action when the normally closed contact assembly is restored to the normally closed state to move, when the limit convex plate is contacted with the limit rod of the lower limit assembly, the mechanical operation device is triggered to drive the normally closed contact seat to act, normally closed connection with the normally closed contact assembly is realized, and the condition that whether restoration operation is realized is unclear due to no limit action is avoided, so that the normally closed contact assembly is excessively pressed downwards is avoided.
The substrate below is provided with first pressure spring, first pressure spring is inside to be provided with the normal close pole that runs through upper flat board and lower flat board, the normal close pole runs through the one end tip that lower flat board downwardly extending is provided with normally closed head, be provided with on the flat board down with normally closed head complex through-hole.
The pre-compressed first pressure spring drives the normally closed head to move through the normally closed rod, so that the normally closed head releases the normally closed connection state with the normally closed contact seat, and state switching is realized.
The lower limiting assembly is of an L-shaped structure and comprises a limiting plate positioned at the bottom of an upper flat plate, and a limiting rod penetrating through the upper flat plate and being in butt joint limiting with the limiting convex plate is arranged above the limiting plate.
The normally closed touch seat comprises a group of movable touch plates, a group of closed top plates extending inwards are arranged above the movable touch plates, the joints below the movable touch plates are movably connected through pin shafts, torsion springs are arranged on the outer portions of the pin shafts, and two ends of the upper portions of the torsion springs are respectively clamped into matching positioning grooves formed in the movable touch plates.
The normally closed contact seat is connected with the normally closed head through a group of movable contact plates which are close to each other, the normally closed head is positioned in the normally closed contact seat through being matched with the closed top plate, the normally closed connection state of the normally closed contact assembly and the normally closed contact seat is realized, the torsion spring drives the group of movable contact plates to rotate around a pin shaft at the connection position of the bottom, the upper parts of the group of movable contact plates are far away from each other and are in an open state, and the normally closed head is separated from the normally closed contact seat under the action of the first pressure spring, so that state switching is realized.
The mechanical operating device is a stepping operating mechanism, the stepping operating mechanism comprises a base, a group of transverse linear sliding seats are arranged at intervals on the left side of the front surface of the base, the transverse linear sliding seats are connected through a stepping guide rod, a fixing plate is arranged at one end of the stepping guide rod, which is close to the right side of the base, of the transverse linear sliding seat, a tension spring connected with the transverse linear sliding seat, which is close to the left side of the base, is arranged on the fixing plate, a long-stroke electromagnet seat is arranged on the right side of the front surface of the base, and one end of the stepping guide rod is connected with the long-stroke electromagnet seat through a first sliding rod, and the other end of the stepping guide rod is connected with an operating rod.
The left side of the front lower part of the base is provided with a longitudinal linear sliding seat, a stop ratchet is arranged in the longitudinal linear sliding seat and connected with the longitudinal linear sliding seat through a second pressure spring, the lower end of the stop ratchet is connected with a first electromagnet seat through a corresponding first sliding rod, and a plurality of positioning teeth are correspondingly arranged at the position of the stop ratchet below the stepping guide rod.
The mechanical operation device is a stepping operation mechanism, the stepping operation mechanism can drive the normally-closed contact seat to act, the normally-closed connection state and the disconnection state of the normally-closed contact seat and the normally-closed contact are rapidly and reliably switched, and the problem that the current normally-closed switch switching device cannot achieve rapid and reliable disconnection of a normally-closed switch, so that faults are enlarged is solved.
The mechanical operating device is a straight operating mechanism, the straight operating mechanism comprises a frame, a second electromagnet seat is arranged below the inside of the frame, a hinge seat is arranged in front of the second electromagnet seat, a rotating swing arm is movably connected inside the hinge seat, and the rotating swing arm is connected with the second electromagnet seat through a second sliding rod.
The device is characterized in that a linear spring bearing seat is arranged above the frame, an end cover is arranged on the right side face of the linear spring bearing seat, a third pressure spring is arranged inside the linear spring bearing seat, a straight push rod is arranged inside the third pressure spring, one end of the straight push rod is connected with the upper end of the rotary swing arm, and the other end of the straight push rod is connected with the operating rod.
The mechanical operating device can be replaced by a straight operating mechanism, the same straight operating mechanism can drive the normally closed contact seat to act, the normally closed communication state and the disconnection state of the normally closed contact seat and the normally closed contact are rapidly and reliably switched, and the problem that the equipment is damaged due to unreliable or untimely switching action when the equipment abnormality or fault is detected by the conventional normally closed switch switching device is solved.
The normally closed switch state switching device for the transformer substation has the advantages that in use, under the normal state, the normally closed head is positioned in the normally closed contact seat, at the moment, the switch is in the normally closed state, when the state switching is needed, the operating rod is driven to slide outwards in the guide sleeve only through the mechanical operating device, at the moment, the operating rod does not push against the movable contact plate, the movable contact plate rotates around the bottom pin shaft under the action of the torsion spring, the upper part of the movable contact plate is opened, the normally closed head is separated from the normally closed contact seat under the action of the first pressure spring, the connection state of the normally closed contact assembly and the normally closed contact seat is released, the rapid state switching is realized, the movable groove of the fixing seat limits the shaft pin to move up and down only and limits the moving range, the stable and reliable movement of the normally closed contact assembly is ensured, the normally closed head is further ensured to be separated from or connected with the normally closed contact seat, the rapid and reliable state switching action is finally realized, the normally closed switch circuit is rapidly and reliably opened, the fault is prevented from being expanded, the equipment is effectively protected, and the normally closed switch is stable.
Drawings
Fig. 1 is a front view of a normally closed switch state switching device of a transformer substation.
Fig. 2 is a perspective view of a portion of the structure of fig. 1 according to the present invention.
Fig. 3 is a bottom view of fig. 2 in accordance with the present invention.
Fig. 4 is a schematic diagram illustrating an internal structure of the normally closed contact base of fig. 1 according to the present invention.
Fig. 5 is an exploded view of a part of the structure of a normally closed switch state switching device of a transformer substation.
Fig. 6 is a schematic view of a first embodiment of a mechanical operation device of a normally closed switch state switching device of a transformer substation according to the present invention.
Fig. 7 is a front view of fig. 6 in accordance with the present invention.
Fig. 8 is a schematic view of a second embodiment of a mechanical operation device of a normally closed switch state switching device of a transformer substation according to the present invention.
Fig. 9 is a side view of fig. 8 in accordance with the present invention.
In the drawing, 1, an upper flat plate 2, a lower flat plate 3, a connecting column 31, an inner groove positioning column 32, an outer convex edge positioning column 4, a normally closed contact assembly 41, a base plate 42, an arc-shaped part 43, a movable plate 44, a shaft pin 45, a limiting convex plate 46, a first pressure spring 47, a normally closed rod 48, a normally closed head 5, a fixed seat 51, a movable groove 6, a lower limiting assembly 61, a limiting plate 62, a limiting rod 7, an insulating housing 8, a guide sleeve 9, an operating rod 10, a mechanical operating device 11, a normally closed contact seat 101, a movable contact plate 102, a closed top plate 103, a pin shaft 104, a torsion spring 105, a matched positioning groove 12, a through hole 20, a stepping operating mechanism 201, a base 202, a transverse linear sliding seat 203, a stepping guide rod 204, a fixed plate 205, a tension spring 206, a long-stroke electromagnet seat 207, a first sliding rod 208, a longitudinal linear sliding seat 209, a stopping ratchet 210, a second pressure spring 211, a first electromagnet seat 212, a positioning tooth 30, a straight operating mechanism 301, a frame 302, a second electromagnet seat 303, a hinge seat 304, a rotating 305, a second sliding rod 306, a linear spring bearing seat 307, a straight push rod 307, a third straight push rod 308, and a third pressure spring 308 are shown.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Examples
The normally closed switch state switching device of the transformer substation comprises an upper flat plate 1 and a lower flat plate 2, wherein normally closed contact assemblies 4 are arranged on two sides above the upper flat plate 1, fixing seats 5 are arranged on two sides below the normally closed contact assemblies 4, lower limit assemblies 6 used for limiting the descending travel of the normally closed contact assemblies 4 are arranged on two sides, corresponding to the normally closed contact assemblies 4, of the upper flat plate 1, insulating shells 7 are arranged on two sides, corresponding to the normally closed contact assemblies 4, of the lower flat plate 2, normally closed contact seats 11 electrically connected with the normally closed contact assemblies 4 are arranged inside the insulating shells 7, guide sleeves 8 are arranged on the outer sides of the insulating shells 7, operating rods 9 are arranged inside the guide sleeves 8, one ends of the outer sides of the operating rods 9 are connected with mechanical operating devices 10, and the corresponding operating rods 9 are driven to act through the mechanical operating devices 10 to realize state switching of normally closed contact seats 11 and normally closed electrical connection of the normally closed contact assemblies 4.
The upper flat plate 1 and the lower flat plate 2 are connected through a plurality of connecting columns 3, and the connecting columns 3 comprise inner groove positioning columns 31 connected with the bottom of the upper flat plate 1 and outer convex edge positioning columns 32 connected with the top of the lower flat plate 2.
The normally closed contact assembly 4 comprises a base plate 41, arc-shaped portions 42 are arranged on two sides above the base plate 41, movable plates 43 are arranged below the arc-shaped portions 42, shaft pins 44 are arranged inside the movable plates 43, and limiting convex plates 45 are arranged below the inner sides of the movable plates 43.
The base plate 41 below is provided with first pressure spring 46, the inside normally closed pole 47 that runs through upper flat board 1 and lower flat board 2 that is provided with of first pressure spring 46, normally closed pole 47 runs through the one end tip that lower flat board 2 extends downwards and is provided with normally closed head 48, be provided with on the lower flat board 2 with normally closed head 48 complex through-hole 12.
In the embodiment, the working principle of the normally closed contact assembly is that in an initial state, a normally closed head is positioned in a normally closed contact seat, a first pressure spring is in a pre-compression state, a shaft pin is positioned below the inside of a movable groove, a limiting convex plate is in contact with the top of a limiting rod, the normally closed contact assembly and the normally closed contact seat are in a connection state, namely, the switch is in a communication state, when the normally closed contact seat and the normally closed contact assembly are in normally closed connection state switching, the first pressure spring in the pre-compression state drives the normally closed rod and the movable plate to move upwards, the shaft pin moves upwards in the movable groove, the normally closed head is driven by the normally closed rod to be separated from the normally closed contact seat, the connection state of the normally closed rod and the movable plate is released, and state switching is realized, when the arc-shaped part and a base plate are required to drive the first pressure spring, the normally closed rod and the movable plate to move downwards, and the shaft pin moves downwards in the movable groove, so that the normally closed contact seat is driven by the normally closed rod to be connected, and state switching is realized.
The fixing seat 5 is arranged on two sides of the movable plate 43 and is movably connected with the movable plate 43, a vertical movable groove 51 for limiting the shaft pin 44 to move up and down is arranged in front of the fixing seat 5, the whole lower limiting assembly 6 is of an L-shaped structure and comprises a limiting plate 61 positioned at the bottom of the upper flat plate 1, and a limiting rod 62 penetrating through the upper flat plate 1 and limiting the limiting convex plate 45 in a butt joint mode is arranged above the limiting plate 61.
In the embodiment, the movable groove on the fixed seat limits the shaft pin to move up and down only, so that the movable plate of the normally closed contact assembly can move up and down reliably, and further the normally closed head is ensured to be separated from or connected with the normally closed contact seat, and the limiting rod of the lower limiting assembly limits the limiting convex plate, namely limits the downward moving stroke of the movable plate of the normally closed contact assembly when the normally closed contact assembly is restored to the state connected with the normally closed contact seat from the state disconnected with the normally closed contact seat.
The normally closed touch seat 11 comprises a group of movable touch plates 101, a group of closed top plates 102 extending inwards are arranged above the movable touch plates 101, the joints below the movable touch plates are movably connected through pin shafts 103, torsion springs 104 are arranged outside the pin shafts 103, and two ends above the torsion springs 104 are respectively clamped into matching positioning grooves 105 formed in the movable touch plates 101.
The mechanical operating device 10 is a stepping operating mechanism 20, the stepping operating mechanism 20 comprises a base 201, a group of transverse linear sliding seats 202 are arranged at intervals on the left side of the front surface of the base 201, the transverse linear sliding seats 202 are connected through a stepping guide rod 203, a fixing plate 204 is arranged at one end of the stepping guide rod 203, which is close to the right side of the base 201, of the transverse linear sliding seat 202, a tension spring 205 connected with the transverse linear sliding seat 202, which is close to the left side of the base 201, is arranged on the right side of the front surface of the base 201, a long-stroke electromagnet seat 206 is arranged on the right side of the front surface of the base 201, one end of the stepping guide rod 203 is connected with the long-stroke electromagnet seat 206 through a first sliding rod 207, and the other end of the stepping guide rod 203 is connected with an operating rod 9.
The left side of the front lower part of the base 201 is provided with a longitudinal linear sliding seat 208, a stopping ratchet 209 is arranged in the longitudinal linear sliding seat 208, the stopping ratchet 209 is connected with the longitudinal linear sliding seat 208 through a second pressure spring 210, the lower end of the stopping ratchet 209 is connected with a first electromagnet seat 211 through a corresponding first sliding rod 207, and a plurality of positioning teeth 212 are arranged at the position below the stepping guide rod 203 corresponding to the stopping ratchet 209.
In the initial state, the two movable contact plates of the normally-closed contact seat are close to each other and the normally-closed head is positioned inside the normally-closed contact seat through the cooperation of the upper closed top plate, so that the normally-closed connection state of the normally-closed contact assembly and the normally-closed contact seat is realized; when the state is required to be switched, the long-stroke electromagnet seat drives the stepping guide rod to move in the transverse linear sliding seat through the first sliding rod, the operation rod is driven to move away from the corresponding movable contact plate through the stepping guide rod, when the stepping guide rod moves to the innermost end (namely, the fixed plate moves towards the direction close to the long-stroke electromagnet seat and pulls the tension spring), the positioning teeth downwards press the stopping ratchet, the stopping ratchet rises under the action of the second pressure spring, the positioning teeth downwards press the stopping ratchet until the stepping guide rod completely moves to the innermost end and then stop, the stopping ratchet cooperates with the positioning teeth under the action of the second pressure spring to realize the state locking of the stepping guide rod and the operation rod, at the moment, the operation rod is completely separated from the corresponding movable contact plate, namely, when the operation rod is not tightly propped against the movable contact plate, the movable contact plate rotates around the bottom pin shaft under the action of the torsion spring, the upper part of the movable contact plate is opened, the normally closed head is separated from the normally closed contact seat under the action of the first pressure spring, the normally closed contact assembly is released from the normally closed contact seat, the connection state of the normally closed contact seat is released, the normally closed contact assembly is rapidly switched between the normally closed contact seat and the normally closed contact seat is realized, when the normally closed connection state is required, the normally closed assembly is pressed downwards, the normally closed contact assembly is closed under the normal state is correspondingly, the normally closed contact assembly is closed, the normally is moved down under the normally, the normally closed seat is closed, the normally and the normally closed seat is closed, and the state is stopped, and the normally so that the state is stopped, and the normally stop state is separated from the movable contact seat, the stepping guide rod is quickly restored under the action of the tension spring, namely, the stepping guide rod drives the operation rod to move inwards to push against the corresponding movable contact plate, the two movable contact plates of the normally-closed contact seat are close to each other and position the normally-closed head inside the normally-closed contact seat through the cooperation of the upper closed top plate, so that the normally-closed connection state of the normally-closed contact assembly and the normally-closed contact seat is realized, and the state switching is realized.
The invention relates to a normally closed switch state switching device of a transformer substation, which is characterized in that a normally closed head 48 is positioned in a normally closed contact seat 11 in a normal state, at the moment, when the state switching is required, an operating rod 9 is driven to slide outwards in a guide sleeve 8 only through a mechanical operating device 10, at the moment, the operating rod 9 does not push against a movable contact plate 101, the movable contact plate 101 rotates around a bottom pin 103 under the action of a torsion spring 104, the upper part of the movable contact plate 101 is opened, the normally closed head 48 is separated from the normally closed contact seat 11 under the action of a first pressure spring 46, the connection state of a normally closed contact assembly 4 and the normally closed contact seat 11 is released, the quick state switching is realized, the limit 44 of a movable groove 51 of a fixed seat 5 can only move up and down and limit the moving range, the stable and reliable movement of the normally closed contact assembly 4 is ensured, the normally closed head 48 is separated from or connected with the normally closed contact seat 11 is ensured to be carried out stably and reliably, the quick and reliable state switching action is realized, the quick and reliable switching circuit is realized, the device is prevented from being expanded, and the device is protected effectively, and the normally closed switch is simple in structure, the invention is quick and reliable, and stable in state.
Examples
The normally closed switch state switching device for the transformer substation comprises an upper flat plate 1 and a lower flat plate 2, wherein normally closed contact assemblies 4 are arranged on two sides above the upper flat plate 1, fixing seats 5 are arranged on two sides below the normally closed contact assemblies 4, lower limit assemblies 6 used for limiting the descending travel of the normally closed contact assemblies 4 are arranged on two sides, corresponding to the normally closed contact assemblies 4, of the upper flat plate 1, insulating shells 7 are arranged on two sides, corresponding to the normally closed contact assemblies 4, of the lower flat plate 2, normally closed contact seats 11 which are electrically connected with the normally closed contact assemblies 4 are arranged in the insulating shells 7, guide sleeves 8 are arranged on the outer sides of the insulating shells 7, operating rods 9 are arranged in the guide sleeves 8, one ends of the outer sides of the operating rods 9 are connected with mechanical operating devices 10, and the mechanical operating devices 10 drive the corresponding operating rods 9 to act so as to realize normally closed state switching of the normally closed contact seats 11 and the normally closed contact assemblies 4.
The upper flat plate 1 and the lower flat plate 2 are connected through a plurality of connecting columns 3, and the connecting columns 3 comprise inner groove positioning columns 31 connected with the bottom of the upper flat plate 1 and outer convex edge positioning columns 32 connected with the top of the lower flat plate 2.
The normally closed contact assembly 4 comprises a base plate 41, arc-shaped portions 42 are arranged on two sides above the base plate 41, movable plates 43 are arranged below the arc-shaped portions 42, shaft pins 44 are arranged inside the movable plates 43, and limiting convex plates 45 are arranged below the inner sides of the movable plates 43.
The base plate 41 below is provided with first pressure spring 46, the inside normally closed pole 47 that runs through upper flat board 1 and lower flat board 2 that is provided with of first pressure spring 46, normally closed pole 47 runs through the one end tip that lower flat board 2 extends downwards and is provided with normally closed head 48, be provided with on the lower flat board 2 with normally closed head 48 complex through-hole 12.
The fixing seat 5 is arranged on two sides of the movable plate 43 and is movably connected with the movable plate 43, a vertical movable groove 51 for limiting the shaft pin 44 to move up and down is arranged in front of the fixing seat 5, the whole lower limiting assembly 6 is of an L-shaped structure and comprises a limiting plate 61 positioned at the bottom of the upper flat plate 1, and a limiting rod 62 penetrating through the upper flat plate 1 and limiting the limiting convex plate 45 in a butt joint mode is arranged above the limiting plate 61.
The normally closed touch seat 11 comprises a group of movable touch plates 101, a group of closed top plates 102 extending inwards are arranged above the movable touch plates 101, the joints below the movable touch plates are movably connected through pin shafts 103, torsion springs 104 are arranged outside the pin shafts 103, and two ends above the torsion springs 104 are respectively clamped into matching positioning grooves 105 formed in the movable touch plates 101.
The mechanical operating device 10 is a straight operating mechanism 30, the straight operating mechanism 30 comprises a frame 301, a second electromagnet base 302 is arranged below the inside of the frame 301, a hinge base 303 is arranged in front of the second electromagnet base 302, a rotating swing arm 304 is movably connected inside the hinge base 303, and the rotating swing arm 304 is connected with the second electromagnet base 302 through a second sliding rod 305.
A linear spring bearing seat 306 is arranged above the stand 301, an end cover 309 is arranged on the right side face of the linear spring bearing seat 306, a third pressure spring 308 is arranged inside the linear spring bearing seat 306, a straight push rod 307 is arranged inside the third pressure spring 308, one end of the straight push rod 307 is connected with the upper end of the rotating swing arm 304, and the other end of the straight push rod 307 is connected with the operating rod 9.
In the initial state, the two movable contact plates of the normally-closed contact seat are close to each other and the normally-closed head is positioned inside the normally-closed contact seat through the cooperation of the upper closed top plate, so that the normally-closed connection state of the normally-closed contact assembly and the normally-closed contact seat is realized;
When the state is required to be switched, the second electromagnet seat drives the lower end of the rotary swing arm to rotate around the hinge seat through the second sliding rod, the upper end of the rotary swing arm pulls the straight push rod to move in the linear spring bearing seat and extrude the third pressure spring, the operation rod is driven by the straight push rod to move to be separated from the corresponding movable contact plate, at the moment, the operation rod is completely separated from the corresponding movable contact plate, namely, the operation rod does not push the movable contact plate, the movable contact plate rotates around the bottom pin shaft under the action of the torsion spring, the upper part of the movable contact plate is opened, the normally closed head is separated from the normally closed contact seat under the action of the first pressure spring, the connection state of the normally closed contact assembly and the normally closed contact seat is released, the rapid state switching is realized, when the normally closed connection state is required to be restored, the normally closed contact assembly is pressed downwards through the corresponding pressing switch, the normally closed head is enabled to move downwards into the normally closed contact seat, the limiting rod limits the downward movement operation, then the second electromagnet seat is closed, the straight push rod is rapidly restored under the action of the third pressure spring, namely, the operation rod is driven to move inwards to move and push the operation rod to push the corresponding movable contact plate, the normally closed contact seat is pivoted, the normally closed contact seat is correspondingly, the normally closed contact seat is and the normally closed, the normally closed contact assembly is and the normally closed, the movable contact seat is and the normally closed, and the movable contact rod is and the movable contact seat is and the normally closed.
The invention relates to a normally closed switch state switching device of a transformer substation, which is characterized in that a normally closed head 48 is positioned in a normally closed contact seat 11 in a normal state, at the moment, when the state switching is required, an operating rod 9 is driven to slide outwards in a guide sleeve 8 only through a mechanical operating device 10, at the moment, the operating rod 9 does not push against a movable contact plate 101, the movable contact plate 101 rotates around a bottom pin 103 under the action of a torsion spring 104, the upper part of the movable contact plate 101 is opened, the normally closed head 48 is separated from the normally closed contact seat 11 under the action of a first pressure spring 46, the connection state of a normally closed contact assembly 4 and the normally closed contact seat 11 is released, the quick state switching is realized, the limit 44 of a movable groove 51 of a fixed seat 5 can only move up and down and limit the moving range, the stable and reliable movement of the normally closed contact assembly 4 is ensured, the normally closed head 48 is separated from or connected with the normally closed contact seat 11 is ensured to be carried out stably and reliably, the quick and reliable state switching action is realized, the quick and reliable switching circuit is realized, the device is prevented from being expanded, and the device is protected effectively, and the normally closed switch is simple in structure, the invention is quick and reliable, and stable in state.
Claims (7)
1. The normally closed switch state switching device of the transformer substation comprises an upper flat plate and a lower flat plate and is characterized in that normally closed contact assemblies are arranged on two sides above the upper flat plate, fixing seats are arranged on two sides below the normally closed contact assemblies, lower limit assemblies for limiting the descending travel of the normally closed contact assemblies are arranged on two sides, corresponding to the normally closed contact assemblies, of the upper flat plate, insulating shells are arranged on two sides below the lower flat plate, corresponding to the normally closed contact assemblies, normally closed contact seats which are in normally closed electrical connection with the normally closed contact assemblies are arranged in the insulating shells, guide sleeves are arranged on the outer sides of the insulating shells, operation rods are arranged in the guide sleeves, one ends of the outer sides of the operation rods are connected with mechanical operation devices, and the mechanical operation devices drive the corresponding operation rods to act so as to realize the state switching of the normally closed contact seats and the normally closed contact assemblies;
the normally closed contact assembly comprises a substrate, arc-shaped parts are arranged on two sides above the substrate, movable plates are arranged below the arc-shaped parts, shaft pins are arranged inside the movable plates, and limiting convex plates are arranged below the inner sides of the movable plates;
A first pressure spring is arranged below the base plate, a normally closed rod penetrating through the upper flat plate and the lower flat plate is arranged in the first pressure spring, a normally closed head is arranged at one end part of the normally closed rod, which penetrates through the lower flat plate and extends downwards, and a through hole matched with the normally closed head is formed in the lower flat plate;
The normally closed touch seat comprises a group of movable touch plates, a group of closed top plates extending inwards are arranged above the movable touch plates, the joints below the movable touch plates are movably connected through pin shafts, torsion springs are arranged on the outer portions of the pin shafts, and two ends of the upper portions of the torsion springs are respectively clamped into matching positioning grooves formed in the movable touch plates.
2. The normally closed switch state switching device of a transformer substation, as set forth in claim 1, wherein the upper plate and the lower plate are connected by a plurality of connecting columns, the connecting columns comprise an inner groove positioning column connected with the bottom of the upper plate and an outer convex edge positioning column connected with the top of the lower plate.
3. The normally closed switch state switching device of a transformer substation is characterized in that the fixed base is arranged on two sides of the movable plate and is movably connected with the movable plate, a vertical movable groove for limiting the vertical movement of the shaft pin is formed in the front of the fixed base, the whole lower limiting assembly is of an L-shaped structure and comprises a limiting plate positioned at the bottom of the upper plate, and a limiting rod penetrating through the upper plate and limiting the limiting plate in a butt joint mode is arranged above the limiting plate.
4. The normally closed switch state switching device of a transformer substation is characterized in that the mechanical operating device is a stepping operating mechanism, the stepping operating mechanism comprises a base, a group of transverse linear sliding seats are arranged at the left side in front of the base at intervals, the transverse linear sliding seats are connected through stepping guide rods, a fixing plate is arranged at one end, close to the right side of the base, of each stepping guide rod, a tension spring connected with the transverse linear sliding seat close to the left side of the base is arranged on the fixing plate, a long-stroke electromagnet seat is arranged at the right side in front of the base, one end of each stepping guide rod is connected with the long-stroke electromagnet seat through a first sliding rod, and the other end of each stepping guide rod is connected with an operating rod.
5. The normally closed switch state switching device of a transformer substation is characterized in that a longitudinal linear sliding seat is arranged on the left side below the front face of the base, a stopping ratchet is arranged in the longitudinal linear sliding seat and connected with the longitudinal linear sliding seat through a second pressure spring, the lower end of the stopping ratchet is connected with a first electromagnet seat through a corresponding third sliding rod, and a plurality of positioning teeth are arranged below the stepping guide rod correspondingly.
6. The normally closed switch state switching device of the transformer substation is characterized in that the mechanical operating device is a straight operating mechanism, the straight operating mechanism comprises a frame, a second electromagnet seat is arranged below the inner portion of the frame, a hinge seat is arranged in front of the second electromagnet seat, a rotating swing arm is movably connected inside the hinge seat, and the rotating swing arm is connected with the second electromagnet seat through a second sliding rod.
7. The normally closed switch state switching device of a transformer substation is characterized in that a linear spring bearing seat is arranged above the frame, an end cover is arranged on the right side face of the linear spring bearing seat, a third pressure spring is arranged inside the linear spring bearing seat, a straight push rod is arranged inside the third pressure spring, one end of the straight push rod is connected with the upper end of a rotating swing arm, and the other end of the straight push rod is connected with an operating rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411554059.5A CN119049897B (en) | 2024-11-04 | 2024-11-04 | Normally closed switch state switching device of transformer substation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411554059.5A CN119049897B (en) | 2024-11-04 | 2024-11-04 | Normally closed switch state switching device of transformer substation |
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| CN119049897A CN119049897A (en) | 2024-11-29 |
| CN119049897B true CN119049897B (en) | 2025-02-18 |
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| CN202411554059.5A Active CN119049897B (en) | 2024-11-04 | 2024-11-04 | Normally closed switch state switching device of transformer substation |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110896004A (en) * | 2019-11-15 | 2020-03-20 | 广东电网有限责任公司 | Circuit breaker divides closing auxiliary device on spot |
| CN118448215A (en) * | 2024-05-15 | 2024-08-06 | 浙江天正电气股份有限公司 | Energy-saving electric control system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT982535B (en) * | 1973-03-15 | 1974-10-21 | Telemeccanica Elettrica | SWITCH AVAILABLE WITH NORMALLY CLOSED CONTACTS OR WITH NORMALLY OPEN CONTACTS |
| JPH05325744A (en) * | 1992-05-19 | 1993-12-10 | Mitsubishi Electric Corp | Vacuum circuit breaker |
| CN2304994Y (en) * | 1997-05-22 | 1999-01-20 | 中国贵航集团天义电工厂 | Small-sized closed normally closed contactor |
| JP2003346598A (en) * | 2002-05-23 | 2003-12-05 | Yokowo Co Ltd | High-frequency changeover switch |
| KR100521240B1 (en) * | 2003-05-12 | 2005-10-17 | 주식회사 비츠로테크 | High Speed Earthing Switch for Neutral Phase of Main Transformer |
| CN207781457U (en) * | 2017-11-24 | 2018-08-28 | 乐清市东科电气有限公司 | A kind of switch |
| CN211182049U (en) * | 2019-12-26 | 2020-08-04 | 无锡持胜车辆部件有限公司 | Normally closed switch for vehicle seat |
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2024
- 2024-11-04 CN CN202411554059.5A patent/CN119049897B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110896004A (en) * | 2019-11-15 | 2020-03-20 | 广东电网有限责任公司 | Circuit breaker divides closing auxiliary device on spot |
| CN118448215A (en) * | 2024-05-15 | 2024-08-06 | 浙江天正电气股份有限公司 | Energy-saving electric control system |
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