CN111415831B - Mechanical locking control mechanism for grounding switch and cable chamber door of switch cabinet - Google Patents
Mechanical locking control mechanism for grounding switch and cable chamber door of switch cabinet Download PDFInfo
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- CN111415831B CN111415831B CN202010178101.3A CN202010178101A CN111415831B CN 111415831 B CN111415831 B CN 111415831B CN 202010178101 A CN202010178101 A CN 202010178101A CN 111415831 B CN111415831 B CN 111415831B
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- rod
- main shaft
- grounding switch
- swing
- tongue piece
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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
- H01H9/22—Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/16—Earthing arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Patch Boards (AREA)
Abstract
A ground switch of a switch cabinet and a cable chamber door mechanical locking control mechanism are provided, wherein a transmission rod and a crank arm are arranged between the ground switch control mechanism and a main shaft of the ground switch, and the left end of the transmission rod is hinged with the crank arm by a first pin; a lock bracket is fixedly installed on the cabinet body, a curved locking rod is installed on the lock bracket, and a swinging block is coaxially and fixedly connected with a first section of the locking rod; a lock tongue piece is arranged on the cable chamber door, and a notch for buckling the third section of the locking rod is formed in the lock tongue piece; a return spring is arranged between the swinging block and the lock bracket; a swing plate and a pressure lever are also arranged; the pressure lever can swing around the first section of the locking lever; the right end of the pressure lever is fixedly connected with a second pin which is inserted into the long hole of the swinging plate; the swing block is fixedly connected with a folded edge which is positioned right below the pressure bar; the pressing rod is fixedly connected with a pressing block. The invention can independently prohibit the main shaft of the grounding switch from rotating under the condition that the cable chamber door is opened.
Description
Technical Field
The invention belongs to the technical field of fixed switch cabinets, and particularly relates to a switch cabinet grounding switch and cable chamber door mechanical locking control mechanism.
Background
Be equipped with the cable chamber in the cabinet body of electrical equipment's the cubical switchboard, install earthing switch in the cable chamber, earthing switch is equipped with earthing switch main shaft and switch, and earthing switch main shaft and switch also install in the cable chamber the inside, are equipped with the cable chamber in the cabinet body, and the cable chamber is equipped with cable chamber door, and cable chamber door is equipped with vertical pivot. For convenience of description, in the present application, the extending direction of the main shaft of the ground switch is taken as the front-back direction, and the direction of the cable chamber door relative to the main shaft of the ground switch is defined as the left direction, that is, the cable chamber door is located at the left side of the main shaft of the ground switch. The earthing switch control mechanism is installed on the right side of the cabinet body, a transmission rod and a crank arm are arranged between the earthing switch control mechanism and an earthing switch main shaft, the crank arm and the earthing switch main shaft are coaxially and fixedly connected and rotate synchronously, the left end of the transmission rod is hinged to the crank arm through a first pin, the axial direction of the first pin is longitudinal, and the right end of the transmission rod is connected with the earthing switch control mechanism. The earthing switch knife switch has two states of opening and closing, an earthing switch control mechanism drives an earthing switch main shaft to rotate clockwise or anticlockwise, the earthing switch main shaft drives a connecting knife switch, and the autorotation of the earthing switch main shaft changes the opening and closing state of the earthing switch knife switch; when the main shaft of the grounding switch rotates anticlockwise to a limit stroke position (namely rotates to a position), the disconnecting link of the grounding switch is in a switching-on position, a conductive loop of the cable chamber is grounded, and no electricity exists in the cable chamber; when the main shaft of the grounding switch rotates clockwise to the limit travel position (namely, rotates to the position), the disconnecting link of the grounding switch is in the disconnecting position, the conductive loop of the cable chamber is not grounded, and the cable chamber is possibly electrified and unsafe. The rotation angle (rotation stroke) of the main shafts of the grounding switches of all the switch cabinets, which rotate clockwise from a closing state to an opening state, is larger than 65 degrees.
Cable chamber often need overhaul maintenance work, for guarantee personnel's personal safety when overhauing, must make and form reliable shutting relation between cable chamber back door and the earthing switch, specifically must satisfy following requirement: when the grounding switch is in a switching-off state, the cable chamber door is prohibited from being opened; only when the grounding switch is in a closing state, the cable chamber door can be opened; after the cable chamber door is opened, the grounding switch is forbidden to be opened (namely, the grounding switch main shaft is forbidden to be operated), so that the cable chamber door is prevented from losing grounding protection suddenly in the maintenance process; the grounding switch can be operated only after the cable chamber door is closed.
In order to meet the above requirements, the applicant has designed a switch cabinet grounding switch and cable chamber door mechanical locking control mechanism, and applied for a utility model patent with patent number ZL 201821156880.1 to the national intellectual property office. In the mechanical lock-closing control mechanism, a cable chamber door is provided with a lock tongue piece, a lock support is fixedly arranged on the rear wall of a cabinet body, a curved-ruler-shaped locking rod is arranged on the lock support and comprises a first locking rod section, a second locking rod section and a third locking rod section which are sequentially connected into a whole, the second locking rod section is connected between the first locking rod section and the third locking rod section, the first locking rod section can be rotatably arranged in a shaft hole of the lock support, a reset torsion spring is arranged between the first locking rod section and the lock support, the lock tongue piece is provided with a notch for the third locking rod section to be buckled in, the first locking rod section is coaxially and fixedly connected with a first swing block, a grounding switch main shaft is coaxially and fixedly connected with a second swing block, a transmission pull rod is connected between the first swing block and the second swing block, the first swing block is hinged with one end of the transmission pull rod, the other end of the transmission pull rod is close to the second swing block and is provided with a strip hole, a pin is arranged at the eccentric position of the second swing block and inserted into the strip hole; when the main shaft of the grounding switch moves from an opening state to a closing state, the second swing block drives the first swing block and the locking rod to rotate through the pin and the transmission pull rod, and the third section of the locking rod leaves the notch of the locking tongue piece; when the main shaft of the grounding switch moves from a closing state to an opening state, the pin of the second swing block slides along the long hole of the transmission pull rod, and the torsion of the reset torsion spring to the locking rod enables the third section of the locking rod to be buckled into the notch of the locking tongue piece.
However, the interlock control mechanism and the interlock control method disclosed in the above ZL 201821156880.1 patent still have problems to be improved, for example, it has not been possible to independently prohibit the operation of the earthing switch main shaft in the case where the cable chamber door is opened.
Disclosure of Invention
The invention aims to overcome the defects and provide a mechanical locking control mechanism for a grounding switch of a switch cabinet and a cable chamber door, which can independently inhibit a main shaft of the grounding switch from rotating under the condition that the cable chamber door is opened; when the grounding switch is in a brake-off state, the cable chamber door is prohibited from being opened; only when the grounding switch is in a closed state, the cable chamber door can be opened.
The purpose can be realized according to the following scheme: a mechanical locking control mechanism for a grounding switch and a cable chamber door of a switch cabinet comprises a cabinet body, wherein a cable chamber is arranged in the cabinet body, the cable chamber is provided with the cable chamber door, the cable chamber door is provided with a vertical rotating shaft, the grounding switch is installed in the cable chamber and is provided with a main shaft of the grounding switch and a disconnecting link, the main shaft of the grounding switch is connected with the disconnecting link, and the main shaft of the grounding switch and the disconnecting link are also installed in the cable chamber;
the cable chamber door is positioned on the left side of the main shaft of the grounding switch by taking the extension direction of the main shaft of the grounding switch as the front-back direction; the right side of the cabinet body is provided with a grounding switch control mechanism, a transmission rod and a crank arm are arranged between the grounding switch control mechanism and a grounding switch main shaft, the crank arm and the grounding switch main shaft are coaxially and fixedly connected and synchronously rotate, the left end of the transmission rod is hinged with the crank arm by a first pin, the axial direction of the first pin is longitudinal, and the right end of the transmission rod is connected to the grounding switch control mechanism; the earthing switch control mechanism drives the earthing switch main shaft to rotate through the transmission rod and the crank arm; when the main shaft of the grounding switch rotates anticlockwise to a proper position, the disconnecting link of the grounding switch is in a closing state; when the main shaft of the grounding switch rotates clockwise to a proper position, the disconnecting link of the grounding switch is in a disconnecting state;
the cabinet body is fixedly provided with a lock support, the lock support is provided with a curved-ruler-shaped locking rod, the curved-ruler-shaped locking rod comprises a first locking rod section, a second locking rod section and a third locking rod section which are sequentially connected into a whole, the extension directions of the first locking rod section and the third locking rod section are longitudinal, and the second locking rod section is connected between the first locking rod section and the third locking rod section; the lock bracket is provided with a shaft hole, and the first section of the locking rod can be rotatably arranged in the shaft hole; the first section of the locking rod is coaxially and fixedly connected with a swinging block, and the swinging block and the locking rod synchronously swing around the central axis of a shaft hole of the lockset bracket;
the cable chamber door is provided with a lock tongue piece which rotates around a vertical rotating shaft of the cable chamber door along with the cable chamber door; the locking tongue piece is provided with a notch for the third section of the locking rod to be buckled in, the notch faces upwards, and the rotating direction of the third section of the locking rod in the process of buckling in the notch is anticlockwise; a return spring is arranged between the swinging block and the lock bracket, and the return spring applies anticlockwise torque to the swinging block;
when the cable chamber door is in a closed state, the spatial position of the lock tongue piece is called as a lock tongue piece normal position; the spatial position of the right edge of the lock tongue piece is called as the normal position of the right edge of the lock tongue piece;
the method is characterized in that: a swing plate and a pressure lever are also arranged; the main shaft of the grounding switch penetrates through the swinging plate, and the swinging plate can swing around the main shaft of the grounding switch; the swing plate is provided with a long hole and an elliptical hole; the first pin on the crank arm is inserted into the elliptical hole of the swinging plate; under the condition that the swing plate is fixed, the first pin is allowed to swing around the main shaft of the grounding switch in the elliptical hole, the maximum amplitude of the allowed swing is called as a first pin free movement angle theta, and the angle theta is larger than 4 degrees and smaller than 8 degrees;
the first section of the locking rod penetrates through the left end of the pressure rod, and the pressure rod can swing around the first section of the locking rod; the right end of the pressure lever is fixedly connected with a second pin, the axial direction of the second pin is longitudinal, and the second pin is inserted into the long hole of the swing plate; in the process that the pressure lever swings around the first section of the locking lever, the second pin slides along the long hole of the swinging plate, the swinging plate correspondingly swings around the main shaft of the grounding switch, and the swinging angle of the pressure lever and the swinging angle of the swinging plate form a corresponding relation;
on the longitudinal projection plane, the direction of a connecting line between the projection point of the second pin and the projection point of the first section of the locking rod is called the long direction of the pressure rod, and the extending direction of the long hole of the swinging plate is called the long direction of the long hole of the swinging plate;
the swing block is fixedly connected with a hem, and the hem, the swing block and the locking rod synchronously swing around the central axis of the shaft hole of the lockset bracket; the folded edge is positioned right below the pressure bar; when the pressure lever is pressed above the hem, the clockwise torque generated by the dead weight of the pressure lever on the hem is larger than the anticlockwise torque applied by the return spring on the swinging block;
the pressure rod is fixedly connected with a pressure block, and the pressure block and the pressure rod synchronously swing around the first section of the locking rod;
when the cable chamber door is in a closed state and the main shaft of the grounding switch rotates anticlockwise to a proper position, the lock tongue piece is positioned at the normal position of the lock tongue piece, the right side edge of the lock tongue piece is contacted with the press block, the long direction of the press rod and the long direction of the long hole of the swinging plate form an included angle of 105-120 degrees, the second pin is positioned between the far center end and the near center end of the long hole of the swinging plate, the far center position of the long hole of the swinging plate is lower than the near center position of the long hole of the swinging plate, the press rod touches and presses the folded edge of the swinging block, the third section of the locking rod leaves the notch of the lock tongue piece, and the state of the whole mechanism is called a closing and closing state;
when the cable chamber door is in an open state and the main shaft of the grounding switch rotates anticlockwise to a proper position, the lock tongue piece leaves the normal position of the lock tongue piece, the lock tongue piece leaves the press block, the dead weight of the press rod enables the press rod to rotate clockwise to a limit position, the second pin slides to the far end of the long hole along the long hole of the swing plate, the long direction of the press rod and the long direction of the long hole of the swing plate form an included angle of 90 degrees, the press rod touches and presses the folded edge of the swing block, the left end of the press block is positioned on the left side of the normal position of the right edge of the lock tongue piece, and the state of the whole mechanism is called a closing and opening state;
when the cable chamber door is in a closed state and the main shaft of the grounding switch rotates clockwise to a proper position, the lock tongue piece is positioned at the normal position of the lock tongue piece, the press block leaves the right edge of the lock tongue piece, the press rod leaves the folded edge of the swing block, and the third section of the locking rod enters the notch of the lock tongue piece under the action of the counterclockwise moment of the return spring, wherein the state is called a split-gate door closing state;
the space position of the swing plate in the closing and closing state and the space position of the swing plate in the closing and opening state are staggered by an angle ⍵, and the value of the angle ⍵ is smaller than the free movement angle theta of the first pin.
The long hole of the swinging plate has two end points. The proximal end of the long hole of the swing plate refers to the end point of the long hole of the swing plate, which is relatively close to the main shaft of the grounding switch. The far end of the long hole of the swinging plate refers to the end point of the long hole of the swinging plate, which is far away from the main shaft of the grounding switch.
The normal position of the right side edge of the lock tongue piece is a position where the right side edge of the lock tongue piece is located when the cable compartment door is in a closed state. The normal position of the right side edge of the lock tongue piece is a spatial position, the right side edge of the lock tongue piece cannot change along with the movement of the lock tongue piece, and only when the cable chamber door is in a closed state, the right side edge of the lock tongue piece is located at the normal position of the right side edge of the lock tongue piece; thus, when the cable compartment door is in the open position, the right edge of the strike plate is displaced from its normal position.
Similarly, the normal position of the latch piece refers to a position where the latch piece is located when the cable compartment door is in a closed state. The normal position of the lock tongue piece is also a spatial position, the lock tongue piece cannot change along with the movement of the lock tongue piece, and the lock tongue piece comes to the normal position of the lock tongue piece only when the cable chamber door is in a closed state; therefore, when the cable chamber door is in an open state, the locking piece leaves the normal position of the locking piece, and the third section of the locking rod leaves the notch of the locking piece.
The invention has the following advantages and effects:
firstly, the following interlocking relationship is formed among the components of the invention: 1. the main shaft of the grounding switch and the crank arm are fixedly connected into a whole and synchronously swing, only relative swing with a small amplitude can be generated between the crank arm and the swing plate, the swing angle of the swing plate determines the swing angle of the pressure rod (the long direction of the pressure rod and the long direction of the long hole of the swing plate form a one-to-one correspondence relationship), the pressure rod can press the folded edge of the swing block, and the swing block and the locking rod are coaxially and fixedly connected and synchronously swing; 2. the pressing rod and the pressing block swing synchronously, and the pressing block and the tongue locking plate of the cable chamber door have mutual interference relation in the transverse position; 3. the crank arm and the swing plate both rotate around the central axis of the main shaft of the grounding switch, the relative swinging angle of the crank arm and the swing plate is limited to be small by the oval hole of the swing plate and the pin of the crank arm, and the swinging angle theta of the first pin is actually equal to the swinging angle of the swing plate on the premise that the first pin and the crank arm are fixed.
Secondly, in addition to the first point, the present invention further forms the following latching relationship:
1. when the cable chamber door is closed and the earthing switch knife switch is in a switching-off state (the earthing switch main shaft rotates clockwise in place), the pressure lever leaves the folded edge of the swinging block, the locking lever and the swinging block are not pressed by the pressure lever, and the third section of the locking lever is buckled into the notch of the locking tongue piece by the anticlockwise torque of the reset spring to the locking lever, so that the cable chamber door cannot be opened;
2. when the cable chamber door is closed and the grounding switch knife switch is in a closing state (the grounding switch main shaft rotates anticlockwise to be in place), the pressing rod touches and presses the folded edge of the swinging block, the third section of the locking rod leaves the notch of the locking tongue piece, and the cable chamber door can be opened for maintenance;
3. when the earthing switch knife switch is in a closing state (the earthing switch main shaft rotates anticlockwise to be in place) and the cable chamber door is opened, the lock tongue plate moves away leftwards, the lock tongue plate loses the supporting effect on the press block (the press block loses the anticlockwise supporting moment from the lock tongue plate), because the clockwise torque generated by the dead weight of the press rod on the folded edge is greater than the anticlockwise torque applied to the swing block by the reset spring, the press rod automatically swings downwards clockwise, the second pin slides to the far end of the long hole along the long hole of the swing plate, a 90-degree included angle is formed between the long direction of the press rod and the long hole of the swing plate, a right-angle dead point is formed between the press rod and the swing plate, the press rod limits the swing plate to be incapable of rotating, the crank arm is incapable of rotating greatly (at the moment, the maximum angle of the allowed crank arm to swing is equal to the free moving angle theta of the first pin, the allowed crank arm to swing angle is far smaller than the minimum rotating angle value 65 DEG required by the earthing switch main shaft for changing the switching-on and switching-off state), namely, the main shaft of the grounding switch is not allowed to rotate clockwise to the right position, and the disconnecting link of the grounding switch cannot be disconnected, so that the safety of personnel who are overhauling a cable chamber is ensured;
4. when the cable chamber door is changed from an open state to a closed state, the locking piece moves to the right, the locking piece pushes the pressing block anticlockwise, the pressing rod is further driven to slightly swing anticlockwise, an included angle between the long direction of the pressing rod and the long direction of the long hole of the swinging plate is changed into 105-120 degrees, then the right-angle dead point relation between the pressing rod and the swinging plate is removed, the pressing rod can not limit the swinging plate to rotate any more, the grounding switch control mechanism is allowed to drive the grounding switch main shaft to rotate, and the grounding switch main shaft is allowed to rotate clockwise to enable the disconnecting link to be disconnected.
Drawings
Fig. 1 is a schematic overall perspective structure diagram of the embodiment of the present invention in a closing and opening state.
Fig. 2 is a partially enlarged schematic view of M in fig. 1.
Fig. 3 is an enlarged partial view of fig. 2 adjacent to the striking plate.
Fig. 4 is a schematic overall transverse cross-sectional structural diagram when the door is opened and closed according to the embodiment of the present invention.
Fig. 5 is a partial enlarged view of N in fig. 4.
Fig. 6 is an enlarged partial cross-sectional view of fig. 5 adjacent the plunger.
Fig. 7 is a schematic view of the engagement relationship between the striking plate and the locking lever in the closing and opening state.
Fig. 8 is a schematic view of the fit relationship between the locking tongue piece and the pressing piece in fig. 3.
Fig. 9 is a schematic perspective view of the pendulum mass and the hem.
Fig. 10 is a schematic sectional view of the swing block and the hem.
Fig. 11 is a perspective view of the locking lever.
Fig. 12 is a perspective view of the wobble plate.
Fig. 13 is a longitudinal projection diagram of the geometrical matching relationship between the swing plate, the main shaft of the grounding switch and the first pin.
Fig. 14 is a schematic perspective view of the pressing rod and the pressing block.
Fig. 15 is a schematic perspective view of the pressing rod and the pressing block from another angle.
Fig. 16 is a schematic diagram of a state of change after the related components in fig. 2 have evolved into a closing/closing state.
Fig. 17 is an enlarged partial schematic view of the compression column of fig. 16.
Fig. 18 is a schematic diagram of a state of change after the related components in fig. 5 have evolved into a closing/closing state.
Fig. 19 is a schematic view of the tongue plate and the pressing piece in fig. 18.
Fig. 20 is a schematic view showing the engagement relationship between the striking plate and the locking lever in the closing state.
FIG. 21 is an enlarged partial view of the strike, lever, flange, and rocker of FIG. 18, shown adjacent the lever.
Fig. 22 is a schematic diagram showing a state of change after the relevant components in fig. 16 have evolved into a closing and opening state.
Fig. 23 is an enlarged partial schematic view of fig. 22 adjacent to the wobble plate.
Fig. 24 is a schematic diagram showing a state of change after the relevant components in fig. 18 have evolved into a closing and opening state.
Fig. 25 is a schematic longitudinal projection view of the fitting relationship of the relevant components in the closing and opening state.
Fig. 26 is a schematic view showing the fitting relationship between the striking plate and the locking lever in the closed door-open state.
Detailed Description
The mechanical locking control mechanism for the earthing switch and the cable chamber door of the switch cabinet shown in fig. 1, 2, 3, 4 and 5 comprises a cabinet body 9, a cable chamber 11 is arranged in the cabinet body 9, the cable chamber 11 is provided with the cable chamber door 1, the cable chamber door 1 is provided with a vertical rotating shaft, an earthing switch is installed in the cable chamber 11, the earthing switch is provided with an earthing switch main shaft 2 and a disconnecting link 3, the earthing switch main shaft 2 is connected with the disconnecting link 3, and the earthing switch main shaft 2 and the disconnecting link 3 are also installed in the cable chamber 11; the extension direction of the main shaft 2 of the grounding switch is taken as the front-back direction, and the cable chamber door 1 is positioned at the left side of the main shaft 2 of the grounding switch; the right wall 92 of the cabinet body is provided with an earthing switch control mechanism 23, and a transmission rod 22 and a crank arm 21 are arranged between the earthing switch control mechanism 23 and the earthing switch main shaft 2; the crank arm 21 and the earthing switch main shaft are coaxially and fixedly connected with each other 2 to synchronously rotate, the left end of the transmission rod 22 is hinged with the crank arm 21 through a first pin 31, the axial direction of the first pin 31 is longitudinal, and the right end of the transmission rod 22 is connected with an earthing switch control mechanism 23; the earthing switch control mechanism 23 drives the earthing switch main shaft 2 to rotate (namely, autorotation) through the transmission rod 22 and the crank arm 21, and the rotation of the earthing switch main shaft 2 changes the switching-on and switching-off state of the earthing switch disconnecting link 3; when the main shaft 2 of the grounding switch rotates anticlockwise to a proper position, the disconnecting link 3 of the grounding switch is in a closing state; when the main shaft 2 of the grounding switch rotates clockwise to a proper position, the grounding switch-to-knife switch 3 is in a switching-off state.
As shown in fig. 2, 3, 7, 6, 8, 9 and 10, a lock bracket 12 is fixedly installed on a cabinet body 9, a curved locking rod 7 is installed on the lock bracket 12, the curved locking rod 7 comprises a locking rod first section 71, a locking rod second section 72 and a locking rod third section 73 which are sequentially connected into a whole, the extending directions of the locking rod first section 71 and the locking rod third section 73 are longitudinal, and the locking rod second section 72 is connected between the locking rod first section 71 and the locking rod third section 73; the lock holder 12 is provided with an axial bore 10 in which a first section 71 of the locking lever is rotatably mounted; the first section 71 of the locking rod is coaxially and fixedly connected with a swinging block 4, the swinging block 4 is provided with a keyhole 47, the first section 71 of the locking rod is provided with a spline 70, and the spline 70 is inserted into the keyhole 47, so that the swinging block 4 and the locking rod 7 synchronously swing around the central axis of the shaft hole 10 of the lockset bracket (namely the central axis of the first section 71 of the locking rod); the cable chamber door 1 is fixedly provided with a locking tongue piece 8 by a screw 91, and the locking tongue piece 8 rotates around a vertical rotating shaft of the cable chamber door along with the cable chamber door 1; the locking tongue piece 8 is provided with a notch 80 for the locking rod third section to be buckled in, the notch 80 faces upwards, and the rotation direction of the locking rod third section 73 in the process of being buckled in the notch 80 is anticlockwise; a return spring 81 is arranged between the swing block 4 and the lock bracket 12, and the return spring 81 applies counterclockwise torque to the swing block 4.
When the cable chamber door is closed in a normal state, when the cable chamber door 1 is in a closed state, the spatial position of the lock tongue piece 8 is called a lock tongue piece normal position, and the spatial position of the right side edge (shown as an edge AB in fig. 8\ fig. 19) of the lock tongue piece is called a lock tongue piece right side edge normal position; the normal position of the right edge of the strike plate is a fixed position in space, and the normal position cannot change along with the movement of the strike plate 8, but when the cable chamber door is in a closed state, the right edge of the strike plate is located at the normal position of the right edge of the strike plate; therefore, when the cable compartment door 1 is in the open state, the tab right side edge AB is away from the tab right side edge normal position, for example, as shown by a line AB in fig. 25, and when the cable compartment door 1 is opened, the tab right side edge AB is away from the tab right side edge normal position AB. Likewise, the strike plate normal position is a spatial position that does not change with movement of the strike plate 8.
As shown in fig. 2, 3, 5, 6, 12 and 13, a swing plate 6 and a pressure lever 5 are further provided; the swing plate 6 is provided with a round hole 60, the grounding switch main shaft 2 penetrates through the round hole 60 of the swing plate, and the swing plate 6 can swing around the grounding switch main shaft 2; the swing plate 6 is also provided with a long hole 62 and an elliptical hole 63; the first pin 31 on the crank arm 21 is inserted into the elliptical hole 63 of the swing plate; with the wobble plate 6 stationary, the first pin 31 is allowed to swing inside the elliptical hole 63 around the earthing switch main shaft 2, the maximum amplitude of the allowed swing is called the first pin free-movement angle θ, and the first pin free-movement angle θ =6 °; for example, in fig. 13, where the first pin 31 of the left solid line represents that the first pin 31 swings to the left end limit position of the elliptical hole 63, and the first pin 31 of the right dotted line represents that the first pin 31 swings to the right end limit position of the elliptical hole 63, angle E in fig. 13 represents the maximum amplitude of the allowable swing of the first pin, and thus angle E is the first pin free-movement angle θ, and angle E =6 °.
As shown in fig. 2, 3, 5, 6, 14 and 15, a circular hole 50 is formed at the left end of the pressing rod 5, a first section 71 of the locking rod passes through the circular hole 50 at the left end of the pressing rod 5, and the pressing rod 5 can swing around the first section 71 of the locking rod; the right end of the pressure lever 5 is fixedly connected with a second pin 32, the axial direction of the second pin 32 is longitudinal, and the second pin 32 is inserted into the long hole 62 of the swing plate 6; during the process that the press rod 5 swings around the first section 71 of the locking rod, the second pin 32 slides along the long hole 62 of the swing plate, the swing plate 6 correspondingly swings around the main shaft 2 of the grounding switch, and the swing angle of the press rod 5 corresponds to the swing angle of the swing plate 6, so that the long direction of the press rod and the long direction of the long hole of the swing plate form a one-to-one correspondence.
On the longitudinal projection plane, the direction of a connecting line CD between the projection point of the second pin (shown as a point C in fig. 18 and 25) and the projection point of the first section 71 of the locking rod (shown as a point D in fig. 18 and 25) is called the long direction of the pressure rod, and the extending direction of the long hole of the swinging plate (shown as a direction HF in fig. 18 and 25) is called the long direction of the long hole of the swinging plate; in fig. 18 and 25, the proximal end of the long hole 62 of the flap is F, and the distal end of the long hole of the flap is H. In the case shown in fig. 25, the second pin 32 comes to the distal end of the long hole of the flap, so that the spatial positions of the distal end H point of the long hole of the flap and the projected point C of the second pin overlap.
As shown in fig. 2, 3, 5, 6, 9 and 10, the swing block 4 is fixedly connected with a hem 41, the swing block 4 and the hem 41 are formed into a whole, and the hem 41, the swing block 4 and the locking rod 7 synchronously swing around the central axis of the shaft hole 10 of the lock bracket; the folded edge 41 is positioned right below the pressure rod 5; when the pressure lever 5 is pressed above the hem 41, the clockwise torque (namely the clockwise torque swinging around the central axis of the shaft hole 10 of the lock bracket) generated by the dead weight of the pressure lever 5 to the hem 41 is larger than the anticlockwise torque (namely the anticlockwise torque swinging around the central axis of the shaft hole 10 of the lock bracket) applied to the swinging block 4 by the return spring 81;
as shown in fig. 2, 3, 5, 6, 14 and 15, the pressing rod 5 is fixedly connected with a pressing block 51, the pressing rod 5 and the pressing block 51 are formed into a whole, and the pressing block 51 and the pressing rod 5 synchronously swing around the first section 71 of the locking rod.
When the cable chamber door 1 is in a closed state and the main shaft 2 of the grounding switch rotates anticlockwise to a position (the disconnecting link 3 is closed), the locking tongue piece 8 is located at a normal position of the locking tongue piece, the right edge (shown as an AB edge in fig. 19) of the locking tongue piece contacts the pressing block 51, the position of the pressing block 51 determines the length direction CD of the pressing rod, the length direction CD of the pressing rod and the length direction HF of the long hole of the swinging plate form an included angle of 115 degrees, the second pin 32 is located between the far end (shown as an H point in fig. 18) and the near end (shown as an F point in fig. 18) of the long hole of the swinging plate, the position of the far end (shown as an H point in fig. 18) of the long hole of the swinging plate is lower than the position of the near end (shown as an F point in fig. 18) of the long hole of the swinging plate, the pressing rod 5 contacts and presses the folding edge 41 of the swinging block, the moment of the pressing rod 5 on the folding edge 41 counteracts the moment of the return spring 81 to the locking rod 7 anticlockwise, and the third section 73 of the locking rod leaves the notch 80 of the locking tongue piece, such a state of the entire mechanism is referred to as a closing/closing state, as shown in fig. 16, 17, 18, 19, 20, and 21;
when the cable chamber door 1 is in an open stateAnd isWhen the main shaft 2 of the grounding switch rotates anticlockwise to a position (the knife switch 3 is switched on), the locking tongue piece 8 leaves the normal position of the locking tongue piece, the locking tongue piece 8 leaves the press block 51, the press block 51 loses the support of the locking tongue piece 8, the self weight of the press rod enables the press rod 5 to rotate clockwise to a limit position, the second pin 32 slides to the far end of the long hole 62 along the long hole 62 of the swing plate (as the second pin 32 slides to the far end H of the long hole 62, the second pin 32 cannot rotate clockwise around the first section 71 of the lock rod any more, and therefore the press rod 5 rotates clockwise to the limit position), and the press rod presses the lock rod to move clockwise to the limit positionThe angle between the rod length direction CD and the long direction HF of the long hole of the swing plate is 90 degrees, the pressure lever 5 touches and presses the folded edge 41 of the swing block, the left end (shown as point G in fig. 25) of the pressure block 51 is positioned on the left side of the normal position (shown as line ab in fig. 25) of the right edge of the lock tongue piece, the third section 73 of the locking lever does not enter the notch 80 of the lock tongue piece because the lock tongue piece 8 leaves the normal position of the lock tongue piece, and this state of the whole mechanism is called a closing door-opening state, as shown in fig. 22, 23, 24, 25 and 26;
when the cable chamber door 1 is in a closed state and the main shaft 2 of the grounding switch rotates clockwise to a position (disconnecting link 3 is disconnected), the lock tongue piece 8 is positioned at the normal position of the lock tongue piece，The first pin 31 swings to the lower part of the main shaft 2 of the grounding switch around the main shaft 2 of the grounding switch, the second pin 32 swings to the left side of the main shaft 2 of the grounding switch around the main shaft 2 of the grounding switch, the pressing block 41 leaves the right edge of the locking piece 8, the pressing rod 5 leaves the folding edge 41 of the pressing block, and the third section 73 of the locking rod enters the notch 80 of the locking piece under the action of the counterclockwise moment of the return spring 81, and the state is called a switching-off and closing state, as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7 and fig. 8;
the spatial position of the swing plate 6 in the closing and closing state (for example, the spatial position of the swing plate in fig. 18 and 19) and the spatial position of the swing plate 6 in the closing and opening state (for example, the spatial position of the swing plate 6 in fig. 24 and 25) are staggered by an angle ⍵, ⍵ =4 °, and the value of the angle ⍵ is smaller than the first pin free movement angle θ.
The steps of the using method (a method for controlling the mechanical locking of the grounding switch and the cable chamber door of the switch cabinet) of the above embodiment are as follows in sequence:
1. under normal state, cable chamber door 1 is in the closed condition, and earthing switch 3 is in the separating brake state, and earthing switch main shaft 2 is in the terminal point of clockwise rotation stroke, and striking plate 8 is located striking plate normal position，The first pin 31 swings around the main shaft 2 of the grounding switch to the lower part of the main shaft 2 of the grounding switch, the second pin 32 swings around the main shaft 2 of the grounding switch to the left side of the main shaft 2 of the grounding switch, the press block 51 is positioned at the right side of the lock tongue piece 8 and departs from the lock tongue piece 8, the press rod 5 departs from the folded edge 41 of the swing block, the locking rod 7 and the folded edge 41 are not pressedPressing of the lever 5, the counterclockwise torque of the reset torsion spring 61 on the locking lever 7 causes the locking lever third section 73 to snap into the notch 80 of the strike plate, thus the cable chamber door 1 cannot be opened, as shown in fig. 1, 2, 3, 4, 5, 6, 7, 8;
2. when the cable chamber door needs to be opened for maintenance, the following two sub-steps are executed:
(1) the earthing switch control mechanism 23 acts to drive the transmission rod 22 and the crank arm 21 to move, so that the earthing switch main shaft 2 rotates anticlockwise to a proper position (namely rotates anticlockwise to a final position), the earthing switch disconnecting link 3 is switched on, the swinging plate 6 rotates anticlockwise around the earthing switch main shaft 2, the pressure lever 5 rotates clockwise around the first section 71 of the locking lever until the left end of the pressure block 51 contacts the right side edge (AB edge in figure 19) of the locking tongue piece 8, the position of the pressure block 51 determines the length direction CD of the pressure lever, the length direction CD of the pressure lever forms an included angle of 115 degrees with the length direction HF of the long hole of the swinging plate, the second pin 32 is positioned between the far center end (such as the end where the H point is positioned in figure 18) and the near center end (such as the end where the F point is positioned in figure 18), the far center end (such as the end where the H point is positioned in figure 18) of the long hole of the swinging plate is positioned lower than the near center end (such as the end where the F point is positioned in figure 18), the compression bar 5 is also pressed to the folding edge 41 of the swinging block in the process of clockwise rotation around the first section 71 of the locking rod, and the folding edge 41 of the swinging block, the swinging block 4 and the locking rod 7 rotate clockwise around the first section 71 of the locking rod, so that the third section 73 of the locking rod is separated from the notch 80 of the locking tongue piece by overcoming the counterclockwise torque of the return spring 81, and a condition is created for opening the cable chamber door 1, as shown in fig. 16, 17, 18, 19, 20 and 21;
(2) the cable chamber door 1 is opened, the lock tongue piece 8 retreats leftwards along the cable chamber door 1, the lock tongue piece 8 departs from the normal position of the lock tongue piece, the lock tongue piece 8 departs from the press block 51, the lock tongue piece 8 loses the supporting function to the press block 51 (the press block 51 loses the anticlockwise supporting moment from the lock tongue piece 8), as the press rod 5 touches and presses the folding edge 41 of the swinging block, and the clockwise torque generated by the self-weight of the press rod 5 to the folding edge is larger than the anticlockwise torque applied to the swinging block by the reset spring, the press rod 5 automatically swings downwards clockwise until the second pin 32 slides to the far-center end H of the long hole 62 along the long hole of the swinging plate, the long-direction DC of the press rod and the long-direction HF of the swinging plate form an included angle of 90 degrees, the press rod 5 and the swinging plate 6 form a right-angle dead point, the press rod 5 limits the swinging plate 6 to be incapable of rotating, and the crank arm 21 cannot rotate greatly (the maximum angle allowed by the crank arm 21 is equal to the free moving angle theta of the first pin at the moment, the angle of allowing the crank arm 21 to swing is far less than the minimum rotation angle value 65 degrees required by the earthing switch main shaft for changing the switching-on and switching-off state), namely the earthing switch main shaft 2 is not allowed to rotate clockwise to the switching-off state, and the earthing switch knife-switch 3 cannot be switched off, so that the safety of personnel for overhauling a cable chamber is ensured, as shown in fig. 22, 23, 24, 25 and 26; in the process that the pressure lever 5 rotates clockwise by self weight, the pressure lever 5 drives the swing plate 6 to rotate counterclockwise by an angle ⍵ (⍵ =4 ℃) slightly around the central axis of the earthing switch main shaft 2 through the second pin 32, and the crank arm 21, the first pin 31 and the earthing switch main shaft 2 are kept still; after the pressure lever 5 swings downwards clockwise, the left end (shown as point G in fig. 25) of the pressure block 51 is located on the left side of the normal position (shown as line ab in fig. 25) of the right edge of the striking plate; the cable chamber door 1 is opened and then is overhauled;
3. after the overhaul is completed, the cable chamber door 1 is closed again, the strike plate 2 moves rightwards to reach the normal position of the strike plate, the strike plate 8 pushes the press block 5 to swing anticlockwise around the first section 71 of the strike rod, so that the press rod 5 is driven to swing anticlockwise, the press rod 5 swings anticlockwise to drive the swing plate to swing clockwise around the main shaft 2 of the grounding switch by an angle ⍵ (⍵ =4 °), an included angle between the length direction DC of the press rod and the length direction FH of the long hole of the swing plate becomes 115 °, so that the relation between the right dead point of the press rod 5 and the swing plate 6 is released, the press rod 5 can not limit the rotation of the swing plate 6 any more, that is, the grounding switch control mechanism 23 is allowed to drive the main shaft 2 of the grounding switch to rotate, and the closing state as shown in fig. 16 to fig. 21 is recovered, namely the state of the (1) branch step 2 is recovered; in the step 3, as the clockwise swing angle of the swing plate 6 is smaller than the free movement angle theta of the first pin, the crank arm 21 and the swing plate 6 are not affected and remain still;
4. the earthing switch control mechanism 23 acts to drive the transmission rod 22 and the crank arm 21 to move, the moving direction is opposite to the direction of the step (1) in the step 2, the earthing switch spindle 2 rotates clockwise to a position (the earthing switch knife switch 3 is switched off), the swinging plate 6 rotates clockwise around the earthing switch spindle 2, the pressure rod 5 rotates anticlockwise around the first section 71 of the locking rod, the normal state of the step 1 is returned, namely the switching-off and closing state shown in fig. 1 to 8, and a cycle period is completed.
In the above embodiment, the free movement angle θ of the first pin may be changed to 4 °, and correspondingly, the spatial position of the swing plate in the closing and closing state and the spatial position of the swing plate in the closing and opening state may be changed to 3 °.
In the above embodiment, the free movement angle θ of the first pin may be changed to 8 °, and correspondingly, the angle ⍵ between the spatial position of the swing plate in the closing and closing state and the spatial position of the swing plate in the closing and opening state may be changed to 6 °
In the above embodiment, the included angle formed by the long direction CD of the pressing rod and the long direction CF of the long hole of the swinging plate in the closing and closing state may be changed to 120 °, or may be changed to 105 °.
When the value of the angle is modified, the corresponding angle parameter value of the using method (locking control method) is modified correspondingly.
Claims (2)
1. A mechanical locking control mechanism for a grounding switch and a cable chamber door of a switch cabinet comprises a cabinet body, wherein a cable chamber is arranged in the cabinet body, the cable chamber is provided with the cable chamber door, the cable chamber door is provided with a vertical rotating shaft, the grounding switch is installed in the cable chamber and is provided with a main shaft of the grounding switch and a disconnecting link, the main shaft of the grounding switch is connected with the disconnecting link, and the main shaft of the grounding switch and the disconnecting link are also installed in the cable chamber;
the cable chamber door is positioned on the left side of the main shaft of the grounding switch by taking the extension direction of the main shaft of the grounding switch as the front-back direction; the right side of the cabinet body is provided with a grounding switch control mechanism, a transmission rod and a crank arm are arranged between the grounding switch control mechanism and a grounding switch main shaft, the crank arm and the grounding switch main shaft are coaxially and fixedly connected and synchronously rotate, the left end of the transmission rod is hinged with the crank arm by a first pin, the axial direction of the first pin is longitudinal, and the right end of the transmission rod is connected to the grounding switch control mechanism; the earthing switch control mechanism drives the earthing switch main shaft to rotate through the transmission rod and the crank arm; when the main shaft of the grounding switch rotates anticlockwise to a proper position, the disconnecting link of the grounding switch is in a closing state; when the main shaft of the grounding switch rotates clockwise to a proper position, the disconnecting link of the grounding switch is in a disconnecting state;
the cabinet body is fixedly provided with a lock support, the lock support is provided with a curved-ruler-shaped locking rod, the curved-ruler-shaped locking rod comprises a first locking rod section, a second locking rod section and a third locking rod section which are sequentially connected into a whole, the extension directions of the first locking rod section and the third locking rod section are longitudinal, and the second locking rod section is connected between the first locking rod section and the third locking rod section; the lock bracket is provided with a shaft hole, and the first section of the locking rod can be rotatably arranged in the shaft hole; the first section of the locking rod is coaxially and fixedly connected with a swinging block, and the swinging block and the locking rod synchronously swing around the central axis of a shaft hole of the lockset bracket;
the cable chamber door is provided with a lock tongue piece which rotates around a vertical rotating shaft of the cable chamber door along with the cable chamber door; the locking tongue piece is provided with a notch for the third section of the locking rod to be buckled in, the notch faces upwards, and the rotating direction of the third section of the locking rod in the process of buckling in the notch is anticlockwise; a return spring is arranged between the swinging block and the lock bracket, and the return spring applies anticlockwise torque to the swinging block;
when the cable chamber door is in a closed state, the spatial position of the lock tongue piece is called as a lock tongue piece normal position; the spatial position of the right edge of the lock tongue piece is called as the normal position of the right edge of the lock tongue piece;
the method is characterized in that: a swing plate and a pressure lever are also arranged; the main shaft of the grounding switch penetrates through the swinging plate, and the swinging plate can swing around the main shaft of the grounding switch; the swing plate is provided with a long hole and an elliptical hole; the first pin on the crank arm is inserted into the elliptical hole of the swinging plate; under the condition that the swing plate is fixed, the first pin is allowed to swing around the main shaft of the grounding switch in the elliptical hole, the maximum amplitude of the allowed swing is called as a first pin free movement angle theta, and the angle theta is larger than 4 degrees and smaller than 8 degrees;
the first section of the locking rod penetrates through the left end of the pressure rod, and the pressure rod can swing around the first section of the locking rod; the right end of the pressure lever is fixedly connected with a second pin, the axial direction of the second pin is longitudinal, and the second pin is inserted into the long hole of the swing plate; in the process that the pressure lever swings around the first section of the locking lever, the second pin slides along the long hole of the swinging plate, the swinging plate correspondingly swings around the main shaft of the grounding switch, and the swinging angle of the pressure lever and the swinging angle of the swinging plate form a corresponding relation;
on the longitudinal projection plane, the direction of a connecting line between the projection point of the second pin and the projection point of the first section of the locking rod is called the long direction of the pressure rod, and the extending direction of the long hole of the swinging plate is called the long direction of the long hole of the swinging plate;
the swing block is fixedly connected with a hem, and the hem, the swing block and the locking rod synchronously swing around the central axis of the shaft hole of the lockset bracket; the folded edge is positioned right below the pressure bar; when the pressure lever is pressed above the hem, the clockwise torque generated by the dead weight of the pressure lever on the hem is larger than the anticlockwise torque applied by the return spring on the swinging block;
the pressure rod is fixedly connected with a pressure block, and the pressure block and the pressure rod synchronously swing around the first section of the locking rod;
when the cable chamber door is in a closed state and the main shaft of the grounding switch rotates anticlockwise to a proper position, the lock tongue piece is positioned at the normal position of the lock tongue piece, the right edge of the lock tongue piece is contacted with the press block, the long direction of the press rod and the long direction of the long hole of the swinging plate form an included angle of 105-120 degrees, the second pin is positioned between the far center end and the near center end of the long hole of the swinging plate, the far center position of the long hole of the swinging plate is lower than the near center position of the long hole of the swinging plate, the press rod touches and presses the folded edge of the swinging block, the third section of the locking rod leaves the notch of the lock tongue piece, and the state of the whole mechanical locking control mechanism is called as a closing and closing state;
when the cable chamber door is in an open state and the main shaft of the grounding switch rotates anticlockwise to a proper position, the lock tongue piece leaves the normal position of the lock tongue piece, the lock tongue piece leaves the press block, the dead weight of the press rod enables the press rod to rotate clockwise to a limit position, the second pin slides to the far end of the long hole along the long hole of the swing plate, the long direction of the press rod and the long direction of the long hole of the swing plate form an included angle of 90 degrees, the press rod touches and presses the folded edge of the swing block, the left end of the press block is positioned on the left side of the normal position of the right edge of the lock tongue piece, and the state of the whole mechanical lock control mechanism is called a closing and opening state;
when the cable chamber door is in a closed state and the main shaft of the grounding switch rotates clockwise to a proper position, the lock tongue piece is positioned at the normal position of the lock tongue piece, the press block leaves the right edge of the lock tongue piece, the press rod leaves the folded edge of the swing block, the third section of the locking rod enters the notch of the lock tongue piece under the action of the counterclockwise moment of the reset spring, and the state of the whole mechanical locking control mechanism is called as a split-gate closed state;
the space position of the swing plate in the closing and closing state and the space position of the swing plate in the closing and opening state are staggered by an angle ⍵, and the value of the angle ⍵ is smaller than the free movement angle theta of the first pin.
2. The mechanical lock-closure control mechanism according to claim 1, characterized in that: the free movement angle theta of the first pin is 6 degrees, and the spatial position of the swing plate in the closing and opening state is staggered with the spatial position of the swing plate in the closing and opening state by 4 degrees.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010178101.3A CN111415831B (en) | 2020-03-14 | 2020-03-14 | Mechanical locking control mechanism for grounding switch and cable chamber door of switch cabinet |
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| CN202010178101.3A CN111415831B (en) | 2020-03-14 | 2020-03-14 | Mechanical locking control mechanism for grounding switch and cable chamber door of switch cabinet |
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| CN111415831B true CN111415831B (en) | 2022-04-08 |
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| CN113299501B (en) * | 2021-06-12 | 2022-04-08 | 广东正超电气有限公司 | Front and rear cabinet door locking structure of high-voltage switch cabinet |
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