CN112002577A - Locking control structure of high-voltage switch cabinet - Google Patents
Locking control structure of high-voltage switch cabinet Download PDFInfo
- Publication number
- CN112002577A CN112002577A CN202010956706.0A CN202010956706A CN112002577A CN 112002577 A CN112002577 A CN 112002577A CN 202010956706 A CN202010956706 A CN 202010956706A CN 112002577 A CN112002577 A CN 112002577A
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- Prior art keywords
- rod
- transmission
- shaft
- grounding
- baffle
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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
- 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
-
- 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
- H01H9/22—Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
Abstract
A locking control structure of a high-voltage switch cabinet comprises a cabinet body, wherein the cabinet body is provided with a front door and a rear door, and a circuit breaker, a grounding switch and an isolating switch are arranged in the cabinet body; an interlocking control component is also arranged; the interlocking control assembly comprises a cam, a roller, a circular transverse interlocking rod, an interlocking rod outer sleeve, an interlocking block, an outer side baffle, an inner side front baffle and an inner side rear baffle; the cam is fixedly connected with the grounding isolation operating shaft, and the transverse interlocking rod can be transversely and slidably arranged in the interlocking rod outer sleeve; the inner end of the transverse interlocking rod is fixedly connected with the roller; the outer side baffle can be vertically and slidably installed on the outer side of the interlocking block, the inner side front baffle and the inner side rear baffle can be vertically and slidably installed on the inner side of the interlocking block, the outer side baffle is provided with an outer circle hole for the outer end of the transverse interlocking rod to penetrate through, a semicircular notch is formed in the rear edge of the inner side front baffle, and a semicircular notch is formed in the front edge of the inner side rear baffle. The reliability of the linkage relation is high.
Description
Technical Field
The invention belongs to the technical field of power switch cabinets, and particularly relates to a locking control structure of a high-voltage switch cabinet.
Background
The front door and the rear door are arranged in front of the high-voltage switch cabinet, and the breaker, the grounding switch and the isolating switch are arranged in the cabinet body. In order to ensure the safety of the operating personnel and the equipment, the high-voltage switch cabinet must form the following locking relationship: firstly, because the isolating switch has no arc extinguishing function, the isolating switch and the grounding switch are forbidden to be operated in a live mode under the condition that the breaker is switched on; under the condition that the breaker is switched on, switching on the isolating switch is forbidden; when the isolating switch needs to be operated, the breaker is ensured to be in an opening state; and thirdly, under the condition that the front door or/and the rear door is/are opened, the grounding switch is ensured to be kept in a closing state (the cable chamber door is prevented from losing grounding protection suddenly in the maintenance process), the disconnecting switch is forbidden to be closed (the inside of the cabinet is prevented from being electrified suddenly), and the safety of personnel entering the cabinet is ensured.
To achieve this, various latching mechanisms have been devised, both mechanical and electronic. However, the locking control structure of the existing high-voltage switch cabinet is not only complex in structure, but also poor in reliability of the interlocking relationship, has the possibility of misoperation, and hides a large potential safety hazard.
Disclosure of Invention
The invention aims to overcome the defects and provide an anti-misoperation locking structure of a high-voltage switch cabinet, which has high reliability of interlocking relation.
In order to achieve the purpose, the locking control structure of the high-voltage switch cabinet comprises a cabinet body, wherein the cabinet body is provided with a front door and a rear door, and a circuit breaker, an earthing switch and an isolating switch are arranged in the cabinet body;
the circuit breaker is provided with a switching-on and switching-off rotating shaft, and the axial direction of the switching-on and switching-off rotating shaft is transverse; when the opening and closing rotating shaft rotates to the opening and closing position, the breaker realizes closing; when the opening and closing rotating shaft rotates to the opening position, the circuit breaker realizes opening;
the grounding switch is provided with a grounding switch fixed contact, the isolating switch is provided with an isolating switch fixed contact, the grounding switch and the isolating switch share one operating shaft, the operating shaft is called a grounding isolating operating shaft, the extending direction of the grounding isolating operating shaft is longitudinal, and the grounding isolating operating shaft is installed in an operating shaft hole of the cabinet body;
the grounding isolation operation shaft is coaxially and fixedly connected with a first bevel gear, the first bevel gear is meshed with a second bevel gear, the second bevel gear is coaxially and fixedly connected with a grounding isolation transmission shaft, and the axial direction of the grounding isolation transmission shaft is transverse;
the cabinet body can also be rotatably provided with a swinging contact, the rotating shaft direction of the swinging contact is transverse, the grounding isolation transmission shaft is in driving connection with the swinging contact, and three functional positions are formed in the middle of the swinging track of the swinging contact; when the swinging contact is positioned at a first functional position, the swinging contact is contacted with the fixed contact of the isolating switch and separated from the fixed contact of the grounding switch, the grounding switch is switched off, and the isolating switch is switched on; when the swinging contact is at the second function position, the swinging contact is not contacted with the static contact of the grounding switch or the static contact of the isolating switch, the grounding switch is switched off, and the isolating switch is switched off; when the swinging contact reaches a third function position, the swinging contact is contacted with the fixed contact of the grounding switch and separated from the fixed contact of the isolating switch, the grounding switch is switched on, and the isolating switch is switched off;
it is characterized in that an interlocking control component is also arranged; the interlocking control assembly comprises a cam, a roller, a circular transverse interlocking rod, an interlocking rod outer sleeve, an interlocking block, an outer side baffle, an inner side front baffle and an inner side rear baffle; the cam is fixedly connected with the grounding isolation operation shaft and rotates along with the grounding isolation operation shaft; the transverse interlocking rod can be transversely and slidably arranged in the interlocking rod outer sleeve, and a horizontal return spring for applying elastic force in the inner side direction to the transverse interlocking rod is also arranged; the interlocking block is positioned on the outer side of the interlocking rod outer sleeve, a circular transverse through hole is formed in the interlocking block, and the central axis of the transverse through hole and the central axis of the transverse interlocking rod are positioned on the same straight line; the circumferential side surface of the roller is pressed against the cam surface of the cam, the inner end of the transverse interlocking rod is fixedly connected with the roller, and the transverse interlocking rod and the roller synchronously move transversely;
the outer side baffle plate can be vertically and slidably arranged on the outer side of the interlocking block, the inner side front baffle plate and the inner side rear baffle plate can be vertically and slidably arranged on the inner side of the interlocking block, the transverse positions of the inner side front baffle plate and the inner side rear baffle plate are flush, the rear edge of the inner side front baffle plate is adjacent to the front edge of the inner side rear baffle plate, and the transverse positions of the inner side front baffle plate and the inner side rear baffle plate are positioned on the outer side of the interlocking rod outer sleeve;
the outer side baffle is provided with an outer circular hole for the outer end of the transverse interlocking rod to pass through, and when the outer side baffle moves downwards to the lowest point of the vertical movement track of the outer side baffle, the outer circular hole is aligned with the transverse through hole of the interlocking block;
when the inner side front baffle and the inner side rear baffle both move downwards to the lowest point of the vertical moving track, the two semicircular gaps form an inner circular hole which is aligned with the transverse through hole of the interlocking block;
the cam surface of the cam is provided with a high section part, a low section part and a middle section part, the distance between the high section part and the center line of the cam rotating shaft is greater than the distance between the middle section part and the center line of the cam rotating shaft, and the distance between the middle section part and the center line of the cam rotating shaft is greater than the distance between the low section part and the center line of the cam rotating shaft;
when the grounding isolation operating shaft drives the swinging contact to reach a first functional position through the first bevel gear, the second bevel gear and the grounding isolation transmission shaft, the high section part of the cam contacts the roller, and the transverse position of the outer end point of the transverse interlocking rod is positioned on the outer side of the outer side baffle;
when the grounding isolation operating shaft drives the swinging contact to reach a second functional position through the first bevel gear, the second bevel gear and the grounding isolation transmission shaft, the middle section part of the cam contacts the roller, and the transverse position of the outer end point of the transverse interlocking rod is positioned between the outer side baffle and the inner side front baffle;
when the grounding isolation operating shaft drives the swinging contact to reach a third functional position through the first bevel gear, the second bevel gear and the grounding isolation transmission shaft, the lower section part of the cam contacts the roller, and the transverse position of the outer end point of the transverse interlocking rod is positioned on the inner side of the inner side front baffle;
the first vertical return spring applies upward elasticity to the inner front baffle, the second vertical return spring applies upward elasticity to the inner rear baffle, and the third vertical return spring applies upward elasticity to the outer baffle; the upper part of the outer side baffle is provided with a folded edge, a swing rod is also arranged above the folded edge of the outer side baffle, the swing rod is provided with a horizontal swing shaft, and the swing end of the swing rod is pressed against the folded edge of the outer side baffle;
a first vertical transmission rod is connected below the inner side front baffle and can synchronously and vertically slide with the inner side front baffle, a first curved ruler-shaped connecting rod is connected to the lower end of the first vertical transmission rod and can be rotatably installed on the cabinet body, the rotating shaft of the first curved ruler-shaped connecting rod is located in the middle of the first vertical transmission rod, a first transmission pin is arranged at the lower end of the first vertical transmission rod, a first long hole is formed in the first end of the first curved ruler-shaped connecting rod, the first transmission pin is inserted into the first long hole, a first horizontal transmission rod is connected to the second end of the first curved ruler-shaped connecting rod and can be longitudinally and slidably installed on the cabinet body, a second long hole is formed in the second end of the first curved ruler-shaped connecting rod, a second transmission pin is arranged at the rear end of the first horizontal transmission rod and is inserted into the second long hole, and the front end of the first horizontal transmission rod is close to the front door; in the process of closing the front door, the front door pushes the first horizontal transmission rod to move backwards, the first horizontal transmission rod drives the first curved-ruler-shaped connecting rod to rotate anticlockwise, and the first curved-ruler-shaped connecting rod pulls the inner front baffle downwards through the first vertical transmission rod; after the front door is closed, the first vertical transmission rod reaches the lowest point of the vertical moving track;
a second vertical transmission rod is connected below the inner side rear baffle plate, and the second vertical transmission rod and the inner side rear baffle plate synchronously and vertically slide; the lower end of the second vertical transmission rod is connected with a second curved ruler-shaped connecting rod, the second curved ruler-shaped connecting rod can be rotatably installed on the cabinet body, the rotating shaft of the second curved ruler-shaped connecting rod is located in the middle of the second vertical transmission rod, a third transmission pin is arranged at the lower end of the second vertical transmission rod, a third long hole is formed in the first end of the second curved ruler-shaped connecting rod, the third transmission pin is inserted into the third long hole, the second end of the second curved ruler-shaped connecting rod is connected with a second horizontal transmission rod, the second horizontal transmission rod can be longitudinally and slidably installed on the cabinet body, a fourth long hole is formed in the second end of the second curved ruler-shaped connecting rod, a fourth transmission pin is arranged at the rear end of the second horizontal transmission rod, the fourth transmission pin is inserted into the fourth long hole, and the; in the closing process of the rear door, the rear door pushes the second horizontal transmission rod to move forwards, the second horizontal transmission rod drives the second curved-ruler-shaped connecting rod to rotate clockwise, and the second curved-ruler-shaped connecting rod pulls down the inner side rear baffle through the second vertical transmission rod; when the rear door is closed, the second vertical transmission rod reaches the lowest point of the vertical moving track;
the opening and closing rotating shaft of the circuit breaker is connected with a swing block, and the swing block and the opening and closing rotating shaft synchronously rotate;
a third vertical transmission rod and a transmission short rod are connected between the swing block and the swing rod above the outer side baffle, wherein the upper end of the third vertical transmission rod is hinged with the swing rod above the outer side baffle through a first hinge shaft, and a vertical long hole is formed in the lower end of the third vertical transmission rod; the first end of the transmission short rod is hinged with the swinging block through a second hinge shaft, the second hinge shaft is installed on the swinging block, a fifth transmission pin is arranged at the second end of the transmission short rod, and the fifth transmission pin is inserted into a vertical long hole at the lower end of the third vertical transmission rod;
in the process that the opening and closing rotating shaft of the circuit breaker rotates from the opening and closing position to the opening position, the second hinged shaft swings downwards around the central axis of the opening and closing rotating shaft of the circuit breaker; when the opening and closing rotating shaft of the circuit breaker rotates to the opening position, the fifth transmission pin is positioned at the lowest point of the vertical long hole, and the swing block pulls the outer side baffle plate downwards to the lowest point through the transmission short rod;
when the opening and closing rotating shaft of the circuit breaker rotates to the opening and closing position and the outer side baffle is located at the lowest point of the vertical moving track of the circuit breaker, the fifth transmission pin is located at the upper part of the vertical long hole;
a valve plate is arranged in front of the operation shaft hole and can be vertically movably mounted on the cabinet body, a fourth return spring is sleeved on the valve plate in a matched mode, and upward elastic force is applied to the valve plate by the fourth return spring; a steel wire rope is connected between the valve sheet and the swing block, the lower end point of the steel wire rope is connected with the swing block, and the upper end point of the steel wire rope is connected with the valve sheet; the lower end point of the steel wire rope and the second articulated shaft are respectively positioned on two opposite sides of the central axis of the opening and closing rotating shaft of the circuit breaker; when the opening and closing rotating shaft of the circuit breaker rotates from the opening position to the closing position, the lower end point of the steel wire rope moves downwards; when the opening and closing rotating shaft of the circuit breaker rotates to the opening and closing position, the swinging block pulls the valve piece downwards to the lowest point through the steel wire rope, and the valve piece covers the operation shaft hole of the grounding isolation operation shaft; when the opening and closing rotating shaft of the circuit breaker rotates to the opening position, the valve piece moves upwards to the highest point under the action of the fourth reset spring, and the valve piece does not cover the operation shaft hole of the grounding isolation operation shaft any more.
Preferably, the grounding isolation transmission shaft is fixedly connected with a transmission swing arm, the transmission swing arm synchronously rotates along with the grounding isolation transmission shaft, a connecting rod is connected between the transmission swing arm and the swing contact, and the transmission swing arm, the connecting rod and the swing contact form a double-rocker mechanism.
The rotating shaft of the first curved-ruler-shaped connecting rod and the rotating shaft of the second curved-ruler-shaped connecting rod are positioned on the same straight line.
In the interlocking control assembly, the inner end is the end closer to the cam; the outer end refers to the end far away from the cam; the so-called inner side; is the side closer to the cam; the outer side is a side away from the cam.
The invention has the following advantages and effects:
the invention forms the following linkage relationship:
firstly, under the condition that a breaker is switched on, an isolating switch and a grounding switch cannot be operated in a live-line mode; under the condition that the breaker is switched on, the isolating switch cannot be switched on;
secondly, the isolating switch can be operated only under the condition that the breaker is opened;
and thirdly, under the condition that the front door or/and the rear door is/are opened, the grounding switch can be ensured to keep a closing state, the isolating switch cannot be closed, and the safety of personnel entering the cabinet is ensured.
In addition, the locking relationship of the present invention is reliable.
Drawings
Fig. 1 is a schematic diagram of a transverse projection structure of an embodiment of the invention when the circuit breaker is opened and the swinging contact reaches a second functional position.
Fig. 2 is a schematic diagram of a longitudinal projection structure of the embodiment shown in fig. 1.
FIG. 3 is a schematic top view of the embodiment shown in FIG. 1.
Fig. 4 is an enlarged view of part G of fig. 1.
Fig. 5 is a partially enlarged schematic view of H in fig. 1.
Fig. 6 is an enlarged view of part K of fig. 3.
Fig. 7 is a schematic view of the disconnector and grounding switch of the embodiment shown in fig. 1, when the oscillating contact has reached the second functional position.
Fig. 8 is a perspective view of the interlock control assembly in the state shown in fig. 7.
Fig. 9 is a sectional view schematically showing the interlock control assembly in the state shown in fig. 8.
Fig. 10 is another sectional view schematically showing the interlock control assembly in the state shown in fig. 8.
Fig. 11 is a cam surface structure diagram of the cam.
Fig. 12 is a schematic view of the disconnector and grounding switch of the embodiment shown in fig. 1, when the oscillating contact has reached the first functional position.
Fig. 13 is a perspective view of the interlock control assembly in the state shown in fig. 12.
Fig. 14 is a sectional view schematically showing the interlock control assembly in the state shown in fig. 12.
Fig. 15 is a schematic view of the disconnector and earthing switch of the embodiment shown in fig. 1, when the oscillating contact has reached a third functional position.
Fig. 16 is a perspective view of the interlock control assembly in the state shown in fig. 15.
Fig. 17 is a sectional view schematically showing the interlock control assembly in the state shown in fig. 15.
Fig. 18 is another sectional view schematically showing the interlock control assembly in the state shown in fig. 15.
Fig. 19 is a schematic structural view of an inside front flap and an inside rear flap.
Fig. 20 is a partially enlarged schematic view of fig. 4.
Detailed Description
The locking control structure of the high-voltage switch cabinet shown in fig. 1, 2, 3 and 4 comprises a cabinet body 8, wherein the cabinet body 8 is provided with a front door 81 and a rear door 82, and a circuit breaker, an earthing switch and an isolating switch are installed in the cabinet body 8; the breaker is provided with a switching-on and switching-off rotating shaft 6, and the axial direction of the switching-on and switching-off rotating shaft 6 is transverse; when the opening and closing rotating shaft 6 rotates to the opening and closing position, the breaker is closed; when the opening and closing rotating shaft 6 rotates to the opening position, the breaker realizes opening;
as shown in fig. 1, 3, 5 and 7, the earthing switch is provided with an earthing switch fixed contact 61, the disconnecting switch is provided with an disconnecting switch fixed contact 62, the earthing switch and the disconnecting switch share one operating shaft, the operating shaft is referred to as an earthing and disconnecting operating shaft 7, the extending direction of the earthing and disconnecting operating shaft 7 is longitudinal, and the earthing and disconnecting operating shaft 7 is installed in an operating shaft hole 70 of the cabinet body; the grounding isolation operation shaft is coaxially and fixedly connected with a first bevel gear 71 through a shaft 7, the first bevel gear 71 is meshed with a second bevel gear 72, the second bevel gear 72 is coaxially and fixedly connected with a grounding isolation transmission shaft 74, and the axial direction of the grounding isolation transmission shaft 74 is transverse; the cabinet body can also be rotatably provided with a swinging contact 60, and the rotating shaft 66 direction of the swinging contact is transverse; the grounding isolation transmission shaft 74 is fixedly connected with a transmission swing arm 75, the transmission swing arm 75 synchronously rotates along with the grounding isolation transmission shaft 74, a connecting rod 76 is connected between the transmission swing arm 75 and the swinging contact 60, and the transmission swing arm 75, the connecting rod 76 and the swinging contact 60 form a double-rocker mechanism, so that the grounding isolation transmission shaft 74 is driven and connected with the swinging contact 60.
Three functional positions are formed in the middle of the swing track of the swing contact 60; when the swinging contact 60 is in the first functional position, the swinging contact 60 contacts the fixed contact 62 of the disconnecting switch and is separated from the fixed contact 61 of the grounding switch, the grounding switch is switched off, and the disconnecting switch is switched on, as shown in fig. 12; when the swinging contact 60 is in the second functional position, the swinging contact 60 is not in contact with either the stationary grounding switch contact 62 or the stationary isolating switch contact 61, the grounding switch is switched off, and the isolating switch is switched off, as shown in fig. 7 and 1; when the swinging contact 60 reaches the third functional position, the swinging contact 60 contacts the fixed contact 61 of the grounding switch and is separated from the fixed contact 62 of the isolating switch, the grounding switch is switched on, and the isolating switch is switched off, as shown in fig. 15;
3, 4, 5, 6, 8, 9 and 10, and an interlocking control assembly is also provided; the interlocking control assembly comprises a cam 91, a roller 92, a circular transverse interlocking rod 93, an interlocking rod outer sleeve 94, an interlocking block 95, an outer baffle 96, an inner front baffle 97 and an inner rear baffle 98; the cam 91 is fixedly connected with the grounding isolation operation shaft 7 and rotates along with the grounding isolation operation shaft 7; the transverse interlocking rod 93 is installed in the interlocking rod outer sleeve 94 in a transverse sliding way, and a horizontal return spring 930 for applying elastic force in the inner side direction to the transverse interlocking rod 93 is also arranged; the interlocking block 95 is positioned on the outer side of the interlocking rod outer sleeve 94, the interlocking block 95 is provided with a circular transverse through hole 950, and the central axis of the transverse through hole 950 is positioned on the same straight line with the central axis of the transverse interlocking rod 93; the circumferential side surface of the roller 92 is pressed against the cam surface of the cam 91, the inner end of the transverse interlocking rod 93 is fixedly connected with the roller 92, and the transverse interlocking rod 93 and the roller 92 synchronously move transversely; the outside stop 96 is vertically slidably mounted on the outside of the interlocking block 95, the inside front stop 97 and the inside rear stop 98 are vertically slidably mounted on the inside of the interlocking block 95, the lateral positions of the inside front stop 97 and the inside rear stop 98 are flush, the rear edge of the inside front stop 97 is adjacent to the front edge of the inside rear stop 98, and the lateral positions of the inside front stop 97 and the inside rear stop 98 are located on the outside of the interlocking rod outer sleeve 94; the outer baffle 96 is provided with an outer round hole 960 through which the outer end of the transverse interlocking rod passes, and when the outer baffle 96 moves downwards to the lowest point of the vertical movement track, the outer round hole 960 is aligned with the transverse through hole 950 of the interlocking block;
as shown in fig. 19, the rear edge of the inside front baffle 97 is provided with a semicircular notch 97, the front edge of the inside rear baffle 98 is also provided with a semicircular notch 980, when the inside front baffle 97 and the inside rear baffle 98 both move downwards to the lowest point of the vertical movement track, the semicircular notch 970 and the semicircular notch 980 form an inner circular hole 990 (as shown in fig. 16), and the inner circular hole 990 is aligned with the transverse through hole 950 of the interlocking block 95;
as shown in fig. 10 and 11, the cam surface of the cam 91 is formed with a high-stage portion (e.g., the AB portion in fig. 11) and a low-stage portion (e.g., the EF portion in fig. 11), and a middle-stage portion (e.g., the CD portion in fig. 11), the distance between the high-stage portion (e.g., the AB portion in fig. 11) and the cam rotation axis center line (e.g., the O point in fig. 11) is greater than the distance between the middle-stage portion (e.g., the CD portion in fig. 11) and the cam rotation axis center line (e.g., the O point in fig. 11), and the distance between the middle-stage portion (e.g., the CD portion in fig. 11) and the cam rotation axis center line (e.g., the O point in fig. 11) is greater than the distance between the low-stage portion (e.g.;
as shown in fig. 12, 13 and 14, when the ground isolation operation shaft 7 drives the swinging contact 60 to the first functional position through the first bevel gear 71, the second bevel gear 72, the ground isolation transmission shaft 74, the transmission swing arm 75 and the connecting rod 76, the high-stage part of the cam 91 contacts the roller 92, and the transverse position of the outer end point (e.g., point W in fig. 14) of the transverse interlocking rod 93 is located outside the outer baffle 96;
as shown in fig. 7, 8, 9 and 10, when the ground isolation operation shaft 7 drives the swinging contact 60 to the second functional position through the first bevel gear 71, the second bevel gear 72, the ground isolation transmission shaft 74, the transmission swing arm 75 and the connecting rod 76, the middle section of the cam 91 contacts the roller 92, and the lateral position of the outer end point of the lateral interlocking rod 93 is located between the outer baffle 96 and the inner front baffle 97 (since the lateral position of the inner front baffle 97 is flush, the lateral position of the outer end point of the lateral interlocking rod 93 is also located between the outer baffle 96 and the inner rear baffle 98 at this time, as shown in fig. 10);
as shown in fig. 15, 16, 17 and 18, when the ground isolation operation shaft 7 drives the swinging contact 60 to the third functional position through the first bevel gear 71, the second bevel gear 72, the ground isolation transmission shaft 74, the transmission swing arm 75 and the connecting rod 76, the low-step portion of the cam 91 contacts the roller 92, and the lateral position of the outer end point of the lateral interlock lever 93 is located inside the inner front guard 97 (also inside the inner rear guard 98);
as shown in fig. 10, 9, 8, and 5, a first vertical return spring 51 for applying an upward elastic force to the inner front barrier 97, a second vertical return spring 52 for applying an upward elastic force to the inner rear barrier 98, and a third vertical return spring 53 for applying an upward elastic force to the outer barrier 96 are further provided; the upper part of the outer side baffle 96 is provided with a folded edge 961, a swing rod 64 is also arranged above the folded edge 961 of the outer side baffle, the swing rod 64 is provided with a horizontal swing shaft 640, and the swing end of the swing rod is pressed against the folded edge 961 of the outer side baffle;
as shown in fig. 1, 4, 5, 6, 8 and 20, a first vertical transmission rod 11 is connected below the inner front baffle 97, the first vertical transmission rod 11 and the inner front baffle 97 synchronously slide vertically, a first curved-ruler-shaped connecting rod 12 is connected to the lower end of the first vertical transmission rod 11, the first curved-ruler-shaped connecting rod 12 is rotatably installed on the cabinet body, a rotating shaft 13 of the first curved-ruler-shaped connecting rod is located at the middle position of the first vertical transmission rod 11, a first transmission pin 14 is arranged at the lower end of the first vertical transmission rod 11, a first long hole 15 is formed at the first end of the first curved-ruler-shaped connecting rod 12, the first transmission pin 14 is inserted into the first long hole 15, a first horizontal transmission rod 16 is connected to the second end of the first curved-ruler-shaped connecting rod 12, the first horizontal transmission rod 16 is longitudinally slidably installed on the cabinet body, a second long hole 25 is formed at the second end of the first curved-ruler-shaped connecting rod 12, a second transmission pin 24 is arranged, the second transmission pin 24 is inserted into the second long hole 25, and the front end of the first horizontal transmission rod 16 is close to the front door 81; in the closing process of the front door 81, the front door 81 pushes the first horizontal transmission rod 16 to move backwards, the first horizontal transmission rod 16 drives the first curved-ruler-shaped connecting rod 12 to rotate anticlockwise, and the first curved-ruler-shaped connecting rod 12 pulls the inner front baffle 97 downwards through the first vertical transmission rod 11; when the front door 81 is closed, the first vertical transmission rod 11 reaches the lowest point of the vertical movement track, as shown in fig. 1, 4, 8, 9 and 10;
as shown in fig. 1, 4, 5, 6 and 8, a second vertical transmission rod 21 is connected below the inner rear baffle 98, and the second vertical transmission rod 21 and the inner rear baffle 98 synchronously slide vertically; the lower end of the second vertical transmission rod 21 is connected with a second curved-ruler-shaped connecting rod 22, the second curved-ruler-shaped connecting rod 22 is rotatably installed on the cabinet body, the rotating shaft 23 of the second curved-ruler-shaped connecting rod 22 is located at the middle position of the second curved-ruler-shaped connecting rod 22, and the rotating shaft 13 of the first curved-ruler-shaped connecting rod and the rotating shaft 23 of the second curved-ruler-shaped connecting rod are located on the same straight line, so that the two positions are overlapped in fig. 4. A third transmission pin 34 is arranged at the lower end of the second vertical transmission rod 21, a third long hole 35 is formed in the first end of the second curved-square-shaped connecting rod 22, the third transmission pin 34 is inserted into the third long hole 35, the second end of the second curved-square-shaped connecting rod 22 is connected with a second horizontal transmission rod 26, the second horizontal transmission rod 26 can be longitudinally slidably mounted on the cabinet body, a fourth long hole 45 is formed in the second end of the second curved-square-shaped connecting rod 22, a fourth transmission pin 44 is arranged at the rear end of the second horizontal transmission rod 26, the fourth transmission pin 44 is inserted into the fourth long hole 45, and the rear end of the second horizontal transmission rod 26 is close to the rear door 82; in the closing process of the rear door 82, the rear door 82 pushes the second horizontal transmission rod 26 to move forwards, the second horizontal transmission rod 26 drives the second curved-ruler-shaped connecting rod 22 to rotate clockwise, and the second curved-ruler-shaped connecting rod 22 pulls the inner side rear baffle 98 downwards through the second vertical transmission rod 21; when the rear door 82 is closed, the second vertical transmission rod 21 reaches the lowest point of the vertical movement track thereof, as shown in fig. 1, 4, 8, 9 and 10;
as shown in fig. 1, 4 and 5, the opening and closing rotating shaft 6 of the circuit breaker is connected with a swing block 63, and the swing block 63 and the opening and closing rotating shaft 6 rotate synchronously; a third vertical transmission rod 31 and a transmission short rod 32 are connected between the swing block 63 and the swing rod 64 above the outer side baffle 96, wherein the upper end of the third vertical transmission rod 31 is hinged with the swing rod 64 above the outer side baffle by using a first hinge shaft 41, and the lower end of the third vertical transmission rod 31 is provided with a vertical long hole 310; the first end of the short transmission rod 32 is hinged with the swinging block 63 through a second hinge shaft 42, the second hinge shaft 42 is installed on the swinging block 63, a fifth transmission pin 54 is arranged at the second end of the short transmission rod 32, and the fifth transmission pin 54 is inserted into a vertical long hole 310 at the lower end of the third vertical transmission rod;
in the process that the opening and closing rotating shaft 6 of the circuit breaker rotates from the opening and closing position to the opening position, the second hinge shaft 42 swings downwards around the central axis of the opening and closing rotating shaft 6 of the circuit breaker; when the opening and closing rotating shaft 6 of the circuit breaker rotates to the opening position, the fifth transmission pin 54 is located at the lowest point of the vertical long hole 310, and the swing block 63 pulls the outer side baffle 96 downwards to the lowest point through the transmission short rod 32, as shown in fig. 1 and 4;
when the opening and closing rotating shaft 6 of the circuit breaker rotates to the opening and closing position and the outer baffle 96 is positioned at the lowest point of the vertical moving track, the fifth transmission pin 54 is positioned at the upper part of the vertical long hole 310;
as shown in fig. 1, 4 and 5, a shutter plate 77 is disposed in front of the operation shaft hole 70, the shutter plate 77 is vertically movably mounted on the cabinet, a fourth return spring 79 is disposed in cooperation with the shutter plate 77, and the fourth return spring 79 exerts an upward elastic force on the shutter plate 77; a steel wire rope 78 is connected between the valve sheet 77 and the swing block 63, the lower end point of the steel wire rope 78 is connected with the swing block 63, and the upper end point of the steel wire rope 78 is connected with the valve sheet 77; the lower end point of the steel wire rope 78 and the second hinge shaft 42 are respectively positioned at two opposite sides of the central axis of the opening and closing rotating shaft 6 of the circuit breaker; when the opening and closing rotating shaft 6 of the circuit breaker rotates from the opening position to the closing position, the lower end point of the steel wire rope 78 moves downwards; when the opening and closing rotating shaft 6 of the circuit breaker rotates to the opening and closing position, the swinging block 63 pulls the valve sheet 77 downwards to the lowest point through the steel wire rope 78, and the valve sheet 77 covers the operation shaft hole 70 of the grounding isolation operation shaft; when the opening and closing rotating shaft 6 of the circuit breaker rotates to the opening position, the shutter piece 77 moves upward to the highest point under the action of the fourth return spring 79, and the shutter piece 77 no longer covers the operation shaft hole 70 of the grounding isolation operation shaft, as shown in fig. 5.
The locking method of the above embodiment (the locking control method of the high-voltage switch cabinet adopting the above embodiment) includes the following steps:
(1) in the normal power transmission operation state, the front door 81 and the rear door 82 are both in the closed position, the first horizontal transmission rod 16 is positioned at the rear end point of the longitudinal movement track, and the second horizontal transmission rod 26 is positioned at the front end point of the longitudinal movement track; the circuit breaker is in a closing state, and the opening and closing rotating shaft 6 of the circuit breaker is positioned at a closing position; the swinging contact 60 is located at a first functional position, the swinging contact 60 is in contact with the fixed contact 62 of the isolating switch and is separated from the fixed contact 61 of the grounding switch, the grounding switch is switched off, and the isolating switch is switched on; the high-step part of the cam contacts the roller 92, and the transverse position of the outer end point of the transverse interlocking rod 93 is positioned outside the outer baffle 96; the inner front baffle 97, the inner rear baffle 98 and the outer baffle 98 are all at the lowest point of the respective vertical movement tracks, and the transverse interlocking rod 93 passes through an inner circular hole 990 formed by the inner front baffle and the inner rear baffle and also passes through an outer circular hole 960 of the outer baffle 96, as shown in fig. 12, 13 and 14; the first vertical transmission rod 11, the second vertical transmission rod 21 and the third vertical transmission rod 31 are positioned at the lowest points of the respective vertical movement tracks, and the fifth transmission pin 54 is positioned at the upper part of the vertical long hole 310 of the third vertical transmission rod; the swing block 63 pulls the valve piece 77 downwards to the lowest point through the steel wire rope 78, and the valve piece 77 covers the operation shaft hole 70 of the grounding isolation operation shaft (meaning that an externally-matched grounding isolation operation handle cannot be inserted into the operation shaft hole and cannot drive the grounding isolation operation shaft to rotate);
(2) when the front door and the rear door of the cabinet body need to be opened to change the state of normal power transmission operation, the following sub-steps are executed:
(21) rotating the opening and closing rotating shaft 6 of the circuit breaker to an opening and closing position to open the circuit breaker, wherein the second hinge shaft 42 on the swing block 63 swings downwards around the center line of the opening and closing rotating shaft 6 of the circuit breaker, the fifth transmission pin 54 moves to the lower end of the vertical long hole 310 of the third vertical transmission rod, meanwhile, the lower end point of the steel wire rope 78 swings upwards around the center line of the opening and closing rotating shaft of the circuit breaker, the valve sheet 77 moves upwards to the highest point under the elastic force action of the fourth reset spring 79, and the valve sheet 77 no longer covers the operation shaft hole 70 of the grounding isolation operation shaft;
(22) an externally matched grounding isolation operating handle is inserted into the operating shaft hole 70, the grounding isolation operating handle is in driving connection with a grounding isolation operating shaft 7, the grounding isolation operating handle drives the grounding isolation operating shaft 7 to rotate, the grounding isolation operating shaft 7 drives the swinging contact 60 to reach a second functional position through the first bevel gear 71, the second bevel gear 72, the grounding isolation transmission shaft 74, the transmission swinging arm 75 and the connecting rod 76, the middle section of the cam 91 contacts the roller 92, the transverse interlocking rod 93 is separated from the outer circular hole, and the transverse position of the outer end point of the transverse interlocking rod 93 is positioned between the outer side baffle 96 and the inner side front baffle 97; the swinging contact 60 is not in contact with either the grounding switch fixed contact 61 or the isolating switch fixed contact 62, the grounding switch is opened, and the isolating switch is opened, as shown in fig. 1 to 10;
(23) the grounding isolation operating handle continues to drive the grounding isolation operating shaft 7 to rotate, the grounding isolation operating shaft 7 drives the swinging contact 60 to reach a third functional position through the first bevel gear 71, the second bevel gear 72, the grounding isolation transmission shaft 74, the transmission swinging arm 75 and the connecting rod 76, the grounding switch is switched on, and the isolating switch is switched off; the lower part of the cam 91 contacts the roller 92, the transverse interlocking rod 93 is disengaged from the inner circular hole 990, and the transverse position of the outer end point of the transverse interlocking rod 93 is positioned at the inner side of the inner front baffle 97, as shown in fig. 15, 16, 17 and 18;
(24) the front door 81 is opened, under the action of the elastic force of the first vertical return spring 51, the first vertical transmission rod 11 and the inner side front baffle 97 move upwards, the first curved-ruler-shaped connecting rod 12 rotates clockwise around the rotating shaft 13 thereof, and the first horizontal transmission rod 16 moves forwards; the rear door 82 is opened, the second vertical transmission rod 21 and the inside tailgate 98 move upward under the elastic force of the second vertical return spring 52, the second curved-rule-shaped link 22 rotates counterclockwise around the rotation shaft 23 thereof, and the second horizontal transmission rod 26 moves rearward;
3. in the state after the substep (24) is completed, when power transmission needs to be reclosed, the following substeps are executed:
(31) closing the front door 81, pushing the first horizontal transmission rod 16 to move backwards by the front door 81, pushing the first curved-ruler-shaped connecting rod 12 to rotate anticlockwise around the rotating shaft 13 of the first horizontal transmission rod 16, and pulling the first vertical transmission rod 11 and the inner front baffle 97 to the lowest point by the first curved-ruler-shaped connecting rod 12; the rear door 82 is closed, the rear door 82 pushes the second horizontal transmission rod 26 to move forwards, the second horizontal transmission rod 26 pushes the second curved-ruler-shaped connecting rod 22 to rotate clockwise around the rotating shaft 23 of the second curved-ruler-shaped connecting rod, and the second curved-ruler-shaped connecting rod 22 pulls the second vertical transmission rod 21 and the inner rear baffle 98 downwards to the lowest point; an inner circular hole 990 consisting of the semicircular notch 970 of the inner front baffle and the semicircular notch 980 of the inner rear baffle is aligned with the outer end of the transverse interlocking rod 93;
(32) the grounding isolation operating shaft 7 is in driving connection by utilizing an externally matched grounding isolation operating handle, the grounding isolation operating handle drives the grounding isolation operating shaft 7 to rotate, the grounding isolation operating shaft 7 drives the swinging contact 60 to reach a second functional position through the first bevel gear 71, the second bevel gear 72, the grounding isolation transmission shaft 74, the transmission swinging arm 75 and the connecting rod 76, the middle section of the cam 91 contacts the roller 92, the transverse interlocking rod 93 is inserted into the inner circular hole 990, and the transverse position of the outer end point of the transverse interlocking rod 93 is positioned between the outer side baffle 96 and the inner side front baffle 97; the swinging contact 60 is not contacted with the grounding switch fixed contact 61 or the isolating switch fixed contact 62, the grounding switch is switched off, and the isolating switch is switched off;
(33) the grounding isolation operating handle continues to drive the grounding isolation operating shaft 7 to rotate, the grounding isolation operating shaft 7 drives the swinging contact 60 to reach a first functional position through the first bevel gear 71, the second bevel gear 72, the grounding isolation transmission shaft 74, the transmission swing arm 75 and the connecting rod 76, the swinging contact 60 contacts the isolating switch static contact 62 and is separated from the grounding switch static contact 61, the grounding switch is switched off, and the isolating switch is switched on; the high section part of the cam 91 contacts the roller 92, the transverse interlocking rod 93 is further inserted into the outer round hole 960 of the outer baffle, and the transverse position of the outer end point of the transverse interlocking rod 93 is positioned on the outer side of the outer baffle 96;
(34) the opening and closing rotating shaft 6 of the circuit breaker rotates to the opening and closing position, so that the circuit breaker is closed, the second hinge shaft 42 on the swing block swings upwards around the center line of the opening and closing rotating shaft of the circuit breaker, the fifth transmission pin 54 moves to the upper part of the vertical long hole 310 of the third vertical transmission rod, meanwhile, the lower end point of the steel wire rope 78 swings downwards around the center line of the opening and closing rotating shaft of the circuit breaker, the valve sheet 77 moves downwards to the lowest point under the tensile force action of the steel wire rope 78 and covers the operation shaft hole 70 of the ground isolation operation shaft, and the normal power transmission operation state in the step (1) is recovered.
In the above process, the relationship of the locking protection of each component is specifically explained as follows:
firstly, in the step (1), the valve piece 77 moves downwards to the lowest point under the pulling force of the steel wire rope 78 and covers the operation shaft hole 70 of the ground isolation operation shaft, so that when the breaker is switched on, an externally matched ground isolation operation handle cannot be inserted into the operation shaft hole 70, namely, the isolation switch and the ground switch cannot be operated, the isolation switch cannot be operated to keep switched on, and the ground switch is ensured to keep switched off;
secondly, in the step (21), the valve plate 77 moves upwards to the highest point under the action of the fourth return spring 79, and the valve plate 77 no longer covers the operation shaft hole 70 of the grounding isolation operation shaft, so that an externally matched grounding isolation operation handle can be inserted into the operation shaft hole 70 under the condition of opening the circuit breaker, namely, the isolating switch and the grounding switch can be operated;
thirdly, after the step (22) is completed, if the opening and closing rotating shaft of the circuit breaker is rotated to the opening and closing position by mistake and the circuit breaker is closed, the second hinge shaft 42 of the swing block rotates upwards around the central line of the opening and closing rotating shaft 6, and the transmission short rod 32 moves upwards, on the other hand, because the transverse interlocking rod 93 at the moment is separated from the outer circular hole 960, namely the outer baffle 96 lacks the constraint of the transverse interlocking rod 93, under the elastic force of the third vertical return spring 53, the outer baffle 96 moves upwards, the vertical position of the outer circular hole 960 is staggered with the transverse interlocking rod 93, the transverse interlocking rod 93 cannot be inserted into the outer circular hole 960 again, and the swing contact 60 cannot swing to reach the first function position, namely the isolating switch cannot be closed; therefore, the isolating switch can not be switched on under the condition that the breaker is switched on, and the isolating switch is prevented from generating electric arcs.
Fourthly, in the case that the front door 81 or/and the rear door 82 is opened, the vertical position of the inner circular hole 990 is not aligned with the transverse interlocking rod 93, or the two semicircular notches are not spliced to form the inner circular hole (the two semicircular notches are higher and lower), so that the transverse interlocking rod 93 cannot be inserted into the inner circular hole 990 outwards, which means that the swinging contact 60 can only be in the third functional position, and the earthing switch is ensured to be kept in a closing state, and the isolating switch cannot be closed, so that the safety of personnel entering the cabinet is ensured.
Claims (3)
1. A locking control structure of a high-voltage switch cabinet comprises a cabinet body, wherein the cabinet body is provided with a front door and a rear door, and a circuit breaker, a grounding switch and an isolating switch are arranged in the cabinet body; the circuit breaker is provided with a switching-on and switching-off rotating shaft, and the axial direction of the switching-on and switching-off rotating shaft is transverse; when the opening and closing rotating shaft rotates to the opening and closing position, the breaker realizes closing, and the breaker realizes closing; when the opening and closing rotating shaft rotates to the opening position, the circuit breaker realizes opening and the circuit breaker realizes opening; the grounding switch is provided with a grounding switch fixed contact, the isolating switch is provided with an isolating switch fixed contact, the grounding switch and the isolating switch share one operating shaft, the operating shaft is called a grounding isolating operating shaft, the extending direction of the grounding isolating operating shaft is longitudinal, and the grounding isolating operating shaft is installed in an operating shaft hole of the cabinet body; the grounding isolation operation shaft is coaxially and fixedly connected with a first bevel gear, the first bevel gear is meshed with a second bevel gear, the second bevel gear is coaxially and fixedly connected with a grounding isolation transmission shaft, the axial direction of the grounding isolation transmission shaft is transverse, and the axial direction of the grounding isolation transmission shaft is transverse;
the cabinet body can also be rotatably provided with a swinging contact, the rotating shaft direction of the swinging contact is transverse, the grounding isolation transmission shaft is in driving connection with the swinging contact, and three functional positions are formed in the middle of the swinging track of the swinging contact; when the swinging contact is positioned at a first functional position, the swinging contact is contacted with the fixed contact of the isolating switch and separated from the fixed contact of the grounding switch, the grounding switch is switched off, and the isolating switch is switched on; when the swinging contact is at the second function position, the swinging contact is not contacted with the static contact of the grounding switch or the static contact of the isolating switch, the grounding switch is switched off, and the isolating switch is switched off; when the swinging contact reaches a third function position, the swinging contact is contacted with the fixed contact of the grounding switch and separated from the fixed contact of the isolating switch, the grounding switch is switched on, and the isolating switch is switched off;
it is characterized in that an interlocking control component is also arranged; the interlocking control assembly comprises a cam, a roller, a circular transverse interlocking rod, an interlocking rod outer sleeve, an interlocking block, an outer side baffle, an inner side front baffle and an inner side rear baffle; the cam is fixedly connected with the grounding isolation operation shaft and rotates along with the grounding isolation operation shaft; the transverse interlocking rod can be transversely and slidably arranged in the interlocking rod outer sleeve, and a horizontal return spring for applying elastic force in the inner side direction to the transverse interlocking rod is also arranged; the interlocking block is positioned on the outer side of the interlocking rod outer sleeve, a circular transverse through hole is formed in the interlocking block, and the central axis of the transverse through hole and the central axis of the transverse interlocking rod are positioned on the same straight line; the circumferential side surface of the roller is pressed against the cam surface of the cam, the inner end of the transverse interlocking rod is fixedly connected with the roller, and the transverse interlocking rod and the roller synchronously move transversely;
the outer side baffle plate can be vertically and slidably arranged on the outer side of the interlocking block, the inner side front baffle plate and the inner side rear baffle plate can be vertically and slidably arranged on the inner side of the interlocking block, the transverse positions of the inner side front baffle plate and the inner side rear baffle plate are flush, the rear edge of the inner side front baffle plate is adjacent to the front edge of the inner side rear baffle plate, and the transverse positions of the inner side front baffle plate and the inner side rear baffle plate are positioned on the outer side of the interlocking rod outer sleeve;
the outer side baffle is provided with an outer circular hole for the outer end of the transverse interlocking rod to pass through, and when the outer side baffle moves downwards to the lowest point of the vertical movement track of the outer side baffle, the outer circular hole is aligned with the transverse through hole of the interlocking block; when the inner side front baffle and the inner side rear baffle both move downwards to the lowest point of the vertical moving track, the two semicircular gaps form an inner circular hole which is aligned with the transverse through hole of the interlocking block;
the cam surface of the cam is provided with a high section part, a low section part and a middle section part, the distance between the high section part and the center line of the cam rotating shaft is greater than the distance between the middle section part and the center line of the cam rotating shaft, and the distance between the middle section part and the center line of the cam rotating shaft is greater than the distance between the low section part and the center line of the cam rotating shaft;
when the grounding isolation operating shaft drives the swinging contact to reach a first functional position through the first bevel gear, the second bevel gear and the grounding isolation transmission shaft, the high section part of the cam contacts the roller, and the transverse position of the outer end point of the transverse interlocking rod is positioned on the outer side of the outer side baffle;
when the grounding isolation operating shaft drives the swinging contact to reach a second functional position through the first bevel gear, the second bevel gear and the grounding isolation transmission shaft, the middle section part of the cam contacts the roller, and the transverse position of the outer end point of the transverse interlocking rod is positioned between the outer side baffle and the inner side front baffle;
when the grounding isolation operating shaft drives the swinging contact to reach a third functional position through the first bevel gear, the second bevel gear and the grounding isolation transmission shaft, the lower section part of the cam contacts the roller, and the transverse position of the outer end point of the transverse interlocking rod is positioned on the inner side of the inner side front baffle;
the first vertical return spring applies upward elasticity to the inner front baffle, the second vertical return spring applies upward elasticity to the inner rear baffle, and the third vertical return spring applies upward elasticity to the outer baffle; the upper part of the outer side baffle is provided with a folded edge, a swing rod is also arranged above the folded edge of the outer side baffle, the swing rod is provided with a horizontal swing shaft, and the swing end of the swing rod is pressed against the folded edge of the outer side baffle;
a first vertical transmission rod is connected below the inner side front baffle and can synchronously and vertically slide with the inner side front baffle, a first curved ruler-shaped connecting rod is connected to the lower end of the first vertical transmission rod and can be rotatably installed on the cabinet body, the rotating shaft of the first curved ruler-shaped connecting rod is located in the middle of the first vertical transmission rod, a first transmission pin is arranged at the lower end of the first vertical transmission rod, a first long hole is formed in the first end of the first curved ruler-shaped connecting rod, the first transmission pin is inserted into the first long hole, a first horizontal transmission rod is connected to the second end of the first curved ruler-shaped connecting rod and can be longitudinally and slidably installed on the cabinet body, a second long hole is formed in the second end of the first curved ruler-shaped connecting rod, a second transmission pin is arranged at the rear end of the first horizontal transmission rod and is inserted into the second long hole, and the front end of the first horizontal transmission rod is close to the front door; in the process of closing the front door, the front door pushes the first horizontal transmission rod to move backwards, the first horizontal transmission rod drives the first curved-ruler-shaped connecting rod to rotate anticlockwise, and the first curved-ruler-shaped connecting rod pulls the inner front baffle downwards through the first vertical transmission rod; after the front door is closed, the first vertical transmission rod reaches the lowest point of the vertical moving track;
a second vertical transmission rod is connected below the inner side rear baffle plate, and the second vertical transmission rod and the inner side rear baffle plate synchronously and vertically slide; the lower end of the second vertical transmission rod is connected with a second curved ruler-shaped connecting rod, the second curved ruler-shaped connecting rod can be rotatably installed on the cabinet body, the rotating shaft of the second curved ruler-shaped connecting rod is located in the middle of the second vertical transmission rod, a third transmission pin is arranged at the lower end of the second vertical transmission rod, a third long hole is formed in the first end of the second curved ruler-shaped connecting rod, the third transmission pin is inserted into the third long hole, the second end of the second curved ruler-shaped connecting rod is connected with a second horizontal transmission rod, the second horizontal transmission rod can be longitudinally and slidably installed on the cabinet body, a fourth long hole is formed in the second end of the second curved ruler-shaped connecting rod, a fourth transmission pin is arranged at the rear end of the second horizontal transmission rod, the fourth transmission pin is inserted into the fourth long hole, and the; in the closing process of the rear door, the rear door pushes the second horizontal transmission rod to move forwards, the second horizontal transmission rod drives the second curved-ruler-shaped connecting rod to rotate clockwise, and the second curved-ruler-shaped connecting rod pulls down the inner side rear baffle through the second vertical transmission rod; when the rear door is closed, the second vertical transmission rod reaches the lowest point of the vertical moving track;
the opening and closing rotating shaft of the circuit breaker is connected with a swing block, and the swing block and the opening and closing rotating shaft synchronously rotate; a third vertical transmission rod and a transmission short rod are connected between the swing block and the swing rod above the outer side baffle, wherein the upper end of the third vertical transmission rod is hinged with the swing rod above the outer side baffle through a first hinge shaft, and a vertical long hole is formed in the lower end of the third vertical transmission rod; the first end of the transmission short rod is hinged with the swinging block through a second hinge shaft, the second hinge shaft is installed on the swinging block, a fifth transmission pin is arranged at the second end of the transmission short rod, and the fifth transmission pin is inserted into a vertical long hole at the lower end of the third vertical transmission rod;
in the process that the opening and closing rotating shaft of the circuit breaker rotates from the opening and closing position to the opening position, the second hinged shaft swings downwards around the central axis of the opening and closing rotating shaft of the circuit breaker; when the opening and closing rotating shaft of the circuit breaker rotates to the opening position, the fifth transmission pin is positioned at the lowest point of the vertical long hole, and the swing block pulls the outer side baffle plate downwards to the lowest point through the transmission short rod;
when the opening and closing rotating shaft of the circuit breaker rotates to the opening and closing position and the outer side baffle is located at the lowest point of the vertical moving track of the circuit breaker, the fifth transmission pin is located at the upper part of the vertical long hole;
a valve plate is arranged in front of the operation shaft hole and can be vertically movably mounted on the cabinet body, a fourth return spring is sleeved on the valve plate in a matched mode, and upward elastic force is applied to the valve plate by the fourth return spring; a steel wire rope is connected between the valve sheet and the swing block, the lower end point of the steel wire rope is connected with the swing block, and the upper end point of the steel wire rope is connected with the valve sheet; the lower end point of the steel wire rope and the second articulated shaft are respectively positioned on two opposite sides of the central axis of the opening and closing rotating shaft of the circuit breaker; when the opening and closing rotating shaft of the circuit breaker rotates from the opening position to the closing position, the lower end point of the steel wire rope moves downwards; when the opening and closing rotating shaft of the circuit breaker rotates to the opening and closing position, the swinging block pulls the valve piece downwards to the lowest point through the steel wire rope, and the valve piece covers the operation shaft hole of the grounding isolation operation shaft; when the opening and closing rotating shaft of the circuit breaker rotates to the opening position, the valve piece moves upwards to the highest point under the action of the fourth reset spring, and the valve piece does not cover the operation shaft hole of the grounding isolation operation shaft any more.
2. The latch control structure according to claim 1, characterized in that: the grounding isolation transmission shaft is fixedly connected with a transmission swing arm, the transmission swing arm rotates synchronously along with the grounding isolation transmission shaft, a connecting rod is connected between the transmission swing arm and the swing contact, and the transmission swing arm, the connecting rod and the swing contact form a double-rocker mechanism.
3. The locking control structure of the high-voltage switch cabinet according to claim 1, characterized in that: the rotating shaft of the first curved-ruler-shaped connecting rod and the rotating shaft of the second curved-ruler-shaped connecting rod are positioned on the same straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010956706.0A CN112002577B (en) | 2020-09-12 | 2020-09-12 | Locking control structure of high-voltage switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010956706.0A CN112002577B (en) | 2020-09-12 | 2020-09-12 | Locking control structure of high-voltage switch cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112002577A true CN112002577A (en) | 2020-11-27 |
| CN112002577B CN112002577B (en) | 2022-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010956706.0A Active CN112002577B (en) | 2020-09-12 | 2020-09-12 | Locking control structure of high-voltage switch cabinet |
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| Country | Link |
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| CN (1) | CN112002577B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201307531Y (en) * | 2008-11-21 | 2009-09-09 | 汕头正超电气集团有限公司 | Five-prevention blocking device of switchgear |
| CN103247467A (en) * | 2013-04-06 | 2013-08-14 | 广东南粤电气有限公司 | Interlocking mechanism and interlocking control method for lower door of high-tension switch cabinet and earthing switch |
| CN110993420A (en) * | 2019-12-12 | 2020-04-10 | 江苏天港箱柜有限公司 | Safety interlocking device of switch cabinet |
| CN211376515U (en) * | 2019-12-12 | 2020-08-28 | 江苏天港箱柜有限公司 | Safety interlocking device of switch cabinet |
-
2020
- 2020-09-12 CN CN202010956706.0A patent/CN112002577B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201307531Y (en) * | 2008-11-21 | 2009-09-09 | 汕头正超电气集团有限公司 | Five-prevention blocking device of switchgear |
| CN103247467A (en) * | 2013-04-06 | 2013-08-14 | 广东南粤电气有限公司 | Interlocking mechanism and interlocking control method for lower door of high-tension switch cabinet and earthing switch |
| CN110993420A (en) * | 2019-12-12 | 2020-04-10 | 江苏天港箱柜有限公司 | Safety interlocking device of switch cabinet |
| CN211376515U (en) * | 2019-12-12 | 2020-08-28 | 江苏天港箱柜有限公司 | Safety interlocking device of switch cabinet |
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| Publication number | Publication date |
|---|---|
| CN112002577B (en) | 2022-11-11 |
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