CN214479021U - High-voltage metal armored movable metering cabinet - Google Patents

Abstract

A high-voltage metal armored movable metering cabinet is formed by connecting a movable metering vehicle and a metal armored cabinet; the movable metering car comprises a high-voltage current transformer, a voltage transformer, a car body frame, a movable contact arm, a movable contact, a secondary wire, a secondary wiring plug, a pressing plate and a chassis car. The advantages are that: the current transformer and the voltage transformer are maintained and replaced outside the cabinet, so that the safety of operation and maintenance personnel is improved, and the labor intensity of the operation and maintenance personnel is reduced; the isolation function of the metering cabinet is added, so that the superiority of a dual-power supply scheme is fully exerted, and the continuity and reliability of power supply are improved. The device avoids the push-pull metering vehicle device with load, and meets the five-prevention requirement of the power industry.

Description

High-voltage metal armored movable metering cabinet

Technical Field

The utility model relates to a high-voltage metal armor among high-voltage distribution system can open measurement cabinet.

Background

The existing high-voltage metering cabinet has two structural forms: one is that the current transformer and voltage transformer for metering are fixedly installed in the cabinet, and the conductive connection mode is that the primary incoming and outgoing line of the transformer is directly connected with the conductive copper bar; the structure is not beneficial to the maintenance and replacement of the metering components; and secondly, when the power supply system is a dual-power supply dual-metering belt segmented power supply scheme, when one path of main power receiving switch equipment with one power supply fails and wants to take the load out by the other power supply, the metering has no isolation function, so that the load on the failed side cannot be taken out, the power can be cut off, and the main power receiving switch cabinet on the failed side is maintained, so that the dual-power supply scheme does not play a real role, and the continuity and reliability of power supply are reduced. The other mode is that the isolator adds the mode of measurement mutual-inductor, current transformer and voltage transformer that this kind of structural style measurement was used still are cabinet internal fixation and install, electrically conductive connection form is that mutual-inductor once business turn over line one end and conductive copper bar are connected, the other end is connected with the isolator, the isolator is again with conductive copper bar, this kind of structural style has increased the isolation function of measurement, when satisfying power supply system and taking the sectional power supply scheme for dual power supply dual metering, when one nevertheless has the main powered switchgear of power of the same kind to go wrong, when another way power can take the load out, improve the reliability of power supply, but the maintenance and the change of measurement components and parts are still inconvenient, operation maintainer intensity of labour is effectively improved.

Disclosure of Invention

An object of the utility model is to provide an overcome not enough that prior art exists, rational in infrastructure, safe and reliable's high-pressure metal armor can move open measurement cabinet.

The technical solution of the utility model is that: the device is formed by connecting a movable metering vehicle and a metal armored cabinet; the movable metering car comprises a high-voltage current transformer, a voltage transformer, a car body frame, a movable contact arm, a movable contact, a secondary wire, a secondary wiring plug, a pressing plate and a chassis car. The method is characterized in that: high-voltage current transformer and voltage transformer pass through the bolt assembly on vehicle body frame, the movable contact arm passes through bolted connection on the business turn over line seat of once electrically conductive return circuit, the moving contact is through the tip of bundle spring assembly at the movable contact arm, once electrically conductive return circuit goes out the line seat and links to each other with voltage transformer with insulated wire, high-voltage current transformer and voltage transformer's secondary binding post is connected to on the special plug of secondary wiring through the wire, the clamp plate passes through the bolt fastening in vehicle body frame's both sides, fixed bolster two on vehicle body frame's bottom plate, the installation shutting electro-magnet on the support two, the middle part at shutting electro-magnet coil is installed to shutting electro-magnet locking lever, vehicle body frame passes through the bolt fastening on the chassis car. The screw rod is assembled on the positioning frame through the first shaft sleeve, the second shaft sleeve and the expansion pin, the limiting plate is connected to the positioning frame through a rivet, the handle penetrates through the through strip hole of the positioning frame to be connected with the positioning plate bolt, and the tension spring is assembled on the positioning frame and the positioning plate; the screw nut, the guide sleeve, the first bracket and the torsion spring bracket are assembled on the chassis vehicle frame; a pin shaft is arranged on the first support, a locking plate is arranged on the pin shaft, a torsion spring is sleeved on the pin shaft and clamped between the locking plate and the torsion spring support, and the wheel is assembled on the movable frame through the pin shaft; the screw rod is assembled with the screw nut and the guide sleeve, and the limiting plate is assembled with the first bracket, the torsional spring bracket and the locking plate to connect the positioning frame with the bullet train frame to form a chassis train; and the screw rod is provided with a first interlocking stop block and a second interlocking stop block. The power supply loop of the locking electromagnet coil is connected in series at an auxiliary switch normally-closed point of the main power-receiving switch cabinet circuit breaker, only when the main power-receiving switch cabinet circuit breaker is in a brake-off state, the power supply loop of the locking electromagnet coil can be switched on, the locking electromagnet coil is electrified, the locking electromagnet lock rod is withdrawn, a lock plate on the chassis limited by the locking electromagnet lock rod is unlocked, and the lock plate can be lifted.

The metal armored cabinet comprises a bottom plate, a front lower door, a front middle door, a first hinge, a left side plate, a wall bushing, a front upper door, an upper brow, a right side plate, a lead seal stud, a first door lock, a front middle and upper cross beam, a front middle and lower partition plate, a left guide rail, a two-layer door device, a right guide rail, a sensor, an installation beam, a rear lower door, a conductive copper bar, a static contact box, a static contact, a rear middle and upper cross beam, a main bus chamber sealing plate, a rear upper door, a top plate, a middle partition plate, a middle and upper partition plate, an instrument chamber sealing plate, a second hinge, a small bus chamber cover plate, a small bus support, a secondary interlocking device, a valve device, a middle and lower partition plate, an electricity testing window, a second door lock, an electromagnetic lock, a bolt, a second hinge and an electrified display. The method is characterized in that: the cabinet body is connected with a front middle-upper crossbeam, an instrument room sealing plate, a front middle-lower clapboard, a main bus room sealing plate, a middle clapboard, a middle-upper clapboard and a middle-lower clapboard through bolts, the cabinet body is divided into four compartments of an instrument room, a metering vehicle room, a main bus room and a bus return room, a two-layer door device is arranged in the instrument room, and a gauge meter, a test box and a negative control device are arranged on the two-layer door device; the metering car chamber is provided with a left guide rail, a right guide rail, a valve device and a secondary interlocking device, so that the metering car can be conveniently positioned and moved in the metering car chamber, the metering car can be completely isolated from a charged body when the metering car is switched between a test position and a working position in the metering chamber due to the installation of the valve device, and the secondary interlocking device is installed to prevent the metering car from being plugged with a secondary plug under load when in the working position; a static contact box is arranged on the middle partition plate, a conductive copper bar and a static contact are arranged in the static contact box, so that the metering car chamber, the main bus chamber and the bus return line chamber are interconnected, when the metering car is pushed to a working position from a test position, a movable contact of the metering car is spliced with the static contact arranged in the static contact box, and a primary conductive loop is formed; install the wall bushing on the indoor left side board of main bus-bar, main bus-bar room shrouding installation insulator, install main conductive copper bar on the insulator, main conductive copper bar is connected with branch conductive copper bar, the indoor left side board installation wall bushing of bus-bar return line, the indoor installation roof beam of bus-bar return line, install the sensor on the installation roof beam, install main conductive copper bar on the sensor, main conductive copper bar is connected with branch conductive copper bar, thereby realize that metering device and main powered switch cabinet, the switchgear of voltage transformer cabinet and feeder cabinet constitutes power supply loop.

One end of each of the front upper door, the front middle door, the front lower door, the rear upper door and the rear lower door is respectively connected with the left side plate through a first hinge, and the other end of each of the front upper door, the front middle door, the front lower door, the rear upper door and the rear lower door is respectively connected with the right side plate through a first door lock; the lead sealing stud is arranged on the right side plate, and when the front upper door, the front middle door, the front lower door and the rear lower door are closed, the lead sealing stud penetrates through the through hole in the door, so that the metering lead sealing is convenient for a metering department to additionally install, and the electricity stealing phenomenon is prevented. The back lower door is equipped with the chain with the back upper door, only closes the back upper door earlier, just can close the back lower door, is equipped with the electromagnetic lock on the back lower door, and electromagnetic lock coil and electrified display auxiliary point utilize the wire to concatenate together, and only once when electrically conductive return circuit is electroless, electrified display auxiliary point is closed, and the electromagnetic lock coil is electrified, and the electromagnetic lock just can be opened, and the back lower door just can be opened, otherwise can not open, satisfies that it prevents to miss income electrified interval of electric power system "five prevent" interlocking requirement. The live display is arranged on the rear lower door and is connected with the secondary output binding post of the sensor, so that whether the main bus is live or not can be judged visually; one side of the electricity testing window is connected with the rear lower door through a second hinge, the other side of the electricity testing window is connected with the rear lower door through a second door lock, and the electricity testing window is arranged to provide convenience for electricity testing of the main conductive loop; the brow, the hinge II and the cover plate of the small bus chamber form a small bus chamber, a small bus support is arranged in the small bus chamber, and a conductive copper bar fixed on the small bus support is a communicating conductor between a locking electromagnet coil, an electromagnetic lock and other equipment in the cabinet and a control power supply, so that the connection and the leading of the control power supply are facilitated.

The utility model has the advantages that: firstly, a current transformer and a voltage transformer for metering are fixedly installed in a metering cabinet and are changed into a movable metering vehicle, so that the current transformer and the voltage transformer for metering are maintained and replaced outside the metering cabinet, the safety of operation and maintenance personnel is improved, and the labor intensity of the operation and maintenance personnel is reduced; and secondly, the isolation function of the metering cabinet is added, so that the superiority of a dual-power supply scheme is fully exerted, and the continuity and reliability of power supply are improved. And thirdly, an electrical interlock is arranged between the movable metering vehicle and the main power receiving switch cabinet circuit breaker, and the movable metering vehicle can be switched between a test position and a working position only when the main power receiving switch cabinet circuit breaker is in a switching-off state, so that a push-pull metering vehicle device with load is avoided, and the five-prevention requirement of the power industry is met. Fourthly, the installation of the electromagnetic lock meets the requirement of five-prevention interlocking of the power system to prevent the electromagnetic lock from entering the electrified interval by mistake; and fifthly, due to the structure of the lead sealing stud, a metering lead sealing is convenient to be additionally arranged in a metering department, and the electricity stealing prevention performance of metering equipment is improved.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1 with the removable metering cart in a testing position;

FIG. 3 is a rear view of FIG. 1;

FIG. 4 is a partial cross-sectional view of the front view with the front upper door and the front middle door removed and the metering truck in the testing position;

FIG. 5 is a side view of the removable metering cart in an operative position;

FIG. 6 is a state diagram of the valve arrangement with the removable metering cart in the testing position;

FIG. 7 is a state view of the shutter arrangement with the removable metering cart in the operative position;

FIG. 8 is a locked view of the removable metering lock plate;

FIG. 9 is a cross-sectional view B-B of FIG. 8;

FIG. 10 is a cross-sectional view C-C of FIG. 8;

FIG. 11 is a removable metering lock plate interlock release view.

The reference numerals are explained below: 1 bottom plate, 2 front lower door, 3 front middle door, 4 hinge I, 5 left side plate, 6 wall bushing, 7 front upper door, 8 brow head, 9 right side plate, 10 lead sealing screw bolt, 11 door lock I, 12 front middle upper beam, 13 front middle lower clapboard, 14 left guide rail, 15 movable metering car comprising 15.1 high voltage current transformer, 15.2 voltage transformer, 15.3 car body frame, 15.4 wire inlet seat, 15.5 movable contact arm, 15.6 movable contact, 15.7 binding spring, 15.8 wire outlet seat, 15.9 insulated wire, 15.10 secondary connection terminal, 15.11 secondary connection terminal, 15.12 special plug, 15.13 chassis car, 15.14 positioning car frame, 15.15 movable car frame, 15.16 screw rod, 15.17 shaft sleeve I, 15.18 shaft sleeve II, 15.19 expansion pin, 15.20 limit plate, 15.21 rivet, 15.22 screw nut, 15.23 guide sleeve, 15.24 support I, 15.25 pin shaft support, 15.25 pin shaft sleeve I, 15.25 pin shaft sleeve 26, 15.15.19 expansion pin, 15.25 spring, 15.25 pin clamp plate, 15.33 hand car handle, 15.20 limiting block, 15.30 hand wheel, 15.30 handle, 15.30, 15.9, 15.30, 15.7, 15.30, 15.9, 15.30, 15.7, 15.30, 15.7, 15.30, 15.7, 15.30, 15, 15.30, 15.7, 15.30, 15.7, 15.30, 15.7, 15., 15.34 bolt, 15.35 handle, 15.36 positioning plate, tension spring 15.37, 15.38 bracket two, 15.39 locking bar, 15.40 latching electromagnet coil, 16 two-layer door device, 17 right guide rail, 18 sensor, 19 mounting beam, 20 main conductive copper bar, 21 rear lower door, 22 branch conductive copper bar, 23 static contact box, 24 static contact, 25 rear middle cross beam, 26 main bus chamber closing plate, 27 rear upper door, 28 insulator, 29 top plate, 30 middle partition plate, 31 middle upper partition plate, 32 instrument chamber closing plate, 33 hinge two, 34 small bus plate, 35 small bus bracket, 36 small bus, 37 secondary interlocking device, 38 valve device comprising 38.1 bracket, 38.2 pin four, 38.3 lower crank arm, 38.4 pin two, 38.5 shaft sleeve three, 38.6 pin one, 38.7 left and right bent plate, 38.8 shaft sleeve one, 38.9 shaft sleeve two, 38.10 shaft sleeve three, 38.11 upper pin shaft sleeve four, 38.12 crank arm, 32 lower pin shaft connecting plate, 36.6 upper pin shaft connecting plate, 36539 upper baffle plate, 15.17 upper baffle plate, 38.6 lower baffle plate, 3617 lower baffle plate, 38.17 lower baffle plate, 38.1 lower baffle plate, 38.2 upper baffle plate and 38.1, 38.18 guide rods, 39 middle and lower partition plates, 40 electricity testing windows, 41 door lock II, 42 electromagnetic lock, 43 bolt, 44 hinge II, 45 electrified display and 46 electromagnetic lock nose.

Detailed Description

The following detailed description is made with reference to the accompanying drawings: as shown in the figure, the high-voltage metal armored movable metering cabinet of the utility model is formed by connecting a movable metering vehicle and a metal armored cabinet; wherein a high-voltage current transformer 15.1 and a voltage transformer 15.2 of the movable metering car 15 are assembled on a car body frame 15.3 through bolts, a movable contact arm 15.5 is connected on an incoming wire seat 15.4 and an outgoing wire seat 15.8 of a primary conductive loop of the high-voltage current transformer 15.1 through bolts, a movable contact 15.6 is assembled at the end part of the movable contact arm 15.5 through a bundling spring 15.7, the other end of the outgoing wire seat 15.8 of the primary conductive loop of the high-voltage current transformer 15.1 is connected with a voltage transformer 15.2 through an insulated wire 15.9, a secondary wiring terminal 15.10 of the high-voltage current transformer 15.1 and a secondary wiring terminal 15.11 of the voltage transformer 15.2 are connected to a secondary wiring special plug 15.12 through wires, a pressing plate 15.32 is fixed on two sides of the car body frame 15.3 through bolts, a support II 15.38 is fixed on a bottom plate of the car body frame 15.3 through bolts, a locking electromagnet coil 15.40 is installed on the support II 15.38, and a locking rod 15.39 is installed in the middle part of the locking electromagnet 15.39, the body frame 15.3 is fixed to the chassis 15.13 by bolts. The screw rod 15.16 is assembled on the positioning frame 15.14 through the first shaft sleeve 15.17, the second shaft sleeve 15.18 and the expansion pin 15.19, and the limit plate 15.20 is connected on the positioning frame 15.14 through the rivet 15.21; the nut 15.22, the guide sleeve 15.23, the first bracket 15.24 and the torsion spring bracket 15.25 are assembled on the bullet train frame 15.15; a pin shaft 15.26 is arranged on the first support 15.24, a locking plate 15.27 is arranged on the pin shaft 15.26, and a torsion spring 15.28 is sleeved on the pin shaft 15.26 and clamped between the locking plate 15.27 and the torsion spring support 15.25; a first limiting block 15.29 and a second limiting block 15.30 are mounted on the screw rod 15.16, the screw rod 15.16 is assembled with a screw nut 15.22 and a guide sleeve 15.23, and the limiting plate 15.20 is assembled with a first support 15.24, a torsion spring support 15.25 and a locking plate 15.27 to connect the positioning frame 15.14 and the bullet train frame 15.15 to form a chassis 15.13; a square hole of a handcart crank 15.31 is inserted into a square shaft at the end, the handcart crank 15.31 is rocked to drive a screw rod 15.16 to rotate, a bullet train frame 15.15 is pushed to move, a limiting plate 15.20 and the bullet train frame 15.15 move relatively, the locking plate 15.27 is rotationally lifted and pressed down around a pin shaft 15.26, the first limiting block 15.29 and the second limiting block 15.30 are controlled to rotate by the rotational lifting and lowering of the locking plate 15.27, the rotation of the screw rod 15.16 is limited, and the mutual conversion of the movable metering vehicle between a test position and a working position is realized.

The metal armored cabinet part is characterized in that a bottom plate 1, a left side plate 5, a right side plate 9, a top plate 29 and a rear middle cross beam 25 are riveted to form a cabinet body, the cabinet body is connected with a front middle-upper cross beam 12, an instrument room sealing plate 32, a front middle-lower partition plate 13, a main bus room sealing plate 26, a middle partition plate 30, a middle-upper partition plate 31 and a middle-lower partition plate 39 through bolts, the cabinet body is divided into four compartments of an instrument room, a metering car room, a main bus room and a bus return line room, a two-layer door device 16 is arranged in the instrument room, and a meter, a test box and a negative control device are arranged on the two-layer door device 16; the metering car chamber is provided with a left guide rail 14, a right guide rail 17, a valve device 38 and a secondary interlocking device 37, the left guide rail 14 and the right guide rail 17 are convenient for positioning the draw-out metering car in the metering car chamber and the wheels 15.33 of the movable metering car directionally move along the guide rails, and the valve device 38 is arranged to completely isolate the movable metering car 15 from a charged body when the movable metering car 15 is switched between a test position and a working position in the metering car chamber; the secondary interlocking device 37 is installed to prevent the secondary plug from being plugged and unplugged under load when the movable metering vehicle 15 is in a working position; a static contact box 23 is arranged on the middle partition plate 30, a branch conductive copper bar 22 and a static contact 24 are arranged in the static contact box 23, so that the metering car chamber, the main bus chamber and the bus return line chamber are interconnected, when the movable metering car 15 is pushed to a working position from a test position, a movable contact 15.6 of the movable metering car 15 is spliced with the static contact 24 arranged in the static contact box 23, and a primary conductive loop in the indoor alternating-current metal armored draw-out type metering equipment is formed; the wall bushing 6 is installed on the left side plate 5 in the main bus chamber, the insulator 28 is installed on the seal plate 26 of the main bus chamber, the main conductive copper bar 20 is installed on the insulator 28, the main conductive copper bar 20 is connected with the branch conductive copper bar 22, the wall bushing 6 is installed on the left side plate 5 in the bus return line chamber, the installation beam 19 is installed in the bus return line chamber, the sensor 18 is installed on the installation beam 19, the main conductive copper bar 20 is installed on the sensor 18, the main conductive copper bar 20 is connected with the branch conductive copper bar 22, and therefore the indoor alternating-current metal armored draw-out type metering device, a main power receiving switch cabinet, a voltage transformer cabinet and a feeder line cabinet form a power supply loop.

One end of each of the front upper door 7, the front middle door 3 and the front lower door 2 is connected with the left side plate 5 through a first hinge 4, and the other end of each of the front upper door 7, the front middle door 3 and the front lower door 2 is connected with the right side plate 9 through a first door lock 11; one end of each of the upper rear door 27 and the lower rear door 21 is connected with the left side plate 5 through a first hinge 4, and the other end of each of the upper rear door and the lower rear door is connected with the right side plate 9 through a bolt 43; the lead sealing stud 10 is arranged on the right side plate 9, and when the front upper door 7, the front middle door 3, the front lower door 2 and the rear lower door 21 are closed, the lead sealing stud 10 penetrates through a through hole in the door, so that a metering department can conveniently add metering lead sealing, and the electricity stealing phenomenon is prevented. The back lower door 21 and the back upper door 27 are provided with chain, only the back upper door 27 is closed firstly, the back lower door 21 can be closed, the electromagnetic lock 42 is arranged on the back lower door 21, the coil of the electromagnetic lock 42 is connected with the auxiliary point of the electrified display 45 in series, only when the primary conductive loop is free of electricity, the auxiliary point of the electrified display 45 is closed, the coil of the electromagnetic lock 42 is electrified, the lock rod of the electromagnetic lock 42 can be withdrawn from the lock nose 46 hole fixed on the right side plate 9, the back lower door 21 can be opened, otherwise, the lock rod cannot be opened, and the anti-mistaken entering of the electric power system 'five-prevention' interlocking requirement is met. The live display 45 is arranged on the rear lower door 21 and is connected with a secondary output binding post of the sensor 18, so that whether the main bus is live or not can be judged visually; one side of the electricity testing window 40 is connected with the rear lower door 21 through a second hinge 44, the other side of the electricity testing window is locked with the rear lower door 21 through a second door lock 41, and the electricity testing window 40 is arranged to provide convenience for electricity testing of the main electric circuit; the brow 8, the second hinge 33 and the cover plate 34 of the small bus chamber form a small bus chamber, a small bus support 35 is arranged in the small bus chamber, and a conductive copper bar 36 is fixed on the small bus support to provide a control power supply for the equipment.

And (3) power transmission operation, namely putting the movable metering vehicle 15 into the metal armored cabinet along the left rail 14 and the right rail 17, and retracting the positioning plate 15.36 and inserting the positioning plate into the limiting holes of the left guide rail 14 and the right guide rail 17 under the action of pulling the handle 15.35 and the tension spring 15.37. At the test position of the movable metering car 15 in the metal armored cabinet, the secondary wiring special plug 15.12 of the movable metering car 15 is inserted into a socket in the cabinet, the main power receiving switch cabinet circuit breaker is in an opening state, a power supply circuit of the locking electromagnet coil 15.40 is connected, the locking electromagnet coil 15.40 is electrified, the locking electromagnet lock rod 15.39 is withdrawn, the locking plate 15.27 on the chassis car limited by the locking electromagnet lock rod 15.39 is unlocked, and the locking plate 15.27 can be lifted. The handcart crank 15.31 is inserted into a square hole at the end of the screw rod 15.16, the handcart crank 15.31 is clockwise shaken to drive the screw rod 15.16 to rotate, the screw rod 15.16 pushes the screw nut 15.22 and the chassis movable frame 15.15 driven by the screw nut 15.22 to move from the test position to the working position, and the pressing plate 15.32 on the movable metering vehicle 15 pushes the shaft sleeve three 38.5 and the shaft sleeve four 38.12 on the valve device 38 to roll and rotate and enter the chute of the pressing plate 15.32. A left bent plate 38.7 and a right bent plate 38.7 in the valve device 38 are respectively fixed on a left side plate 5 and a right side plate 9 of the metal armored cabinet through bolts, a first pin shaft 38.6 is fixed on the left bent plate 38.7 and a first shaft sleeve 38.8 is assembled on the first pin shaft 38.6, the first shaft sleeve 38.8 is fixed with a lower crank arm 38.3 together, a second pin shaft 38.4 is fixed on the lower crank arm 38.3, the lower crank arm 38.3 is connected with an upper connecting plate 38.16 through a fourth pin shaft 38.2, and an upper connecting plate 38.16 is connected with an upper baffle 38.17 through a fifth pin shaft 38.14; the second shaft sleeve 38.9 is assembled on the first shaft sleeve 38.8, the second shaft sleeve 38.9 is fixed on the upper crank arm 38.11, the third pin shaft 38.10 is fixed on the upper crank arm 38.11, the upper crank arm 38.11 is connected with the lower connecting plate 38.13 through the fourth pin shaft 38.2, and the lower connecting plate 38.13 is connected with the lower baffle 38.15 through the fifth pin shaft 38.14.

The resistance of the movable metering vehicle 15 in moving to the working position can be reduced by the rolling of the shaft sleeve 38.5 and the shaft sleeve 38.12, the shaft sleeve 38.5 rotates around the first pin shaft 38.6 to drive the lower crank arm 38.3 to rotate upwards around the first pin shaft 38.6, the upward rotation of the lower crank arm 38.3 drives the upper connecting plate 38.16 to move upwards through the fourth pin shaft 38.2, the upper connecting plate 38.16 drives the upper baffle plate 38.17 to move upwards along the guide rod 38.18 assembled on the bracket 38.1 through the fifth pin shaft 38.14, and the shielded upper static contact box 23 is completely exposed; the rotation of the sleeve 38.12 around the first pin 38.6 drives the upper crank arm 38.11 to rotate downward around the first pin 38.6, the downward rotation of the upper crank arm 38.11 drives the lower link plate 38.13 to move downward through the fourth pin 38.2, and the lower link plate 38.13 drives the lower baffle plate 38.15 to move downward along the guide rod 38.18 assembled on the bracket 38.1 through the fifth pin 38.14, so that the shielded lower stationary contact box 23 is completely exposed. When the movable metering vehicle 15 is pushed to the working position from the testing position, the movable contact 15.6 of the movable metering vehicle 15 is plugged with the fixed contact 24 installed in the fixed contact box 23, so that a primary conductive loop in the indoor alternating-current metal armored draw-out type metering equipment is formed. At this time, the secondary wiring dedicated plug 15.12 of the removable metering car 15 is locked by the secondary interlocking device 37 and cannot be pulled out, and the main power receiving switch cabinet circuit breaker can be switched on to supply power. The power supply circuit of the locking electromagnet coil 15.40 is disconnected, the locking electromagnet coil 15.40 is powered off, the locking electromagnet lock rod 15.39 pops up, the locking plate 15.27 on the chassis limited by the locking electromagnet lock rod 15.39 is limited, the locking plate 15.27 cannot be lifted, the movable metering vehicle 15 cannot move to the test position from the working position, and the metering vehicle device is prevented from being pushed and pulled with load.

When power failure operation is carried out, firstly, the main power switch cabinet breaker is opened, the power supply loop of the locking electromagnet coil 15.40 of the movable metering car 15 is switched on, the locking electromagnet coil 15.40 is electrified, the locking electromagnet lock rod 15.39 is retracted, the locking plate 15.27 on the chassis limited by the locking electromagnet lock rod 15.39 is unlocked, and the lock plate 15.27 can be lifted. The handcart crank 15.31 is inserted into a square hole of the lead screw 15.16 end square shaft, the handcart crank 15.31 is shaken anticlockwise to drive the lead screw 15.16 to rotate, then the lead screw 15.16 pulls the screw 15.22 and the chassis frame 15.15 driven by the screw 15.22 to move from a working position to a testing position, the pressure plate 15.32 on the movable metering vehicle 15 moves to the testing position, when the movable metering vehicle 15 reaches the testing position, the shaft sleeve three 38.5 and the shaft sleeve four 38.12 on the valve device 38 slide out from the chute of the pressure plate 15.34, the upper baffle 38.17 moves downwards along the guide rod 38.18 assembled on the bracket 38.1 under the action of self weight, the upper connecting plate 38.16 connected with the upper baffle 38.17 through the pin five 38.14 moves downwards, the lower connecting arm 38.3 connected with the upper connecting plate 38.16 through the pin four 38.2 rotates downwards to reset around the pin one 38.6, and the upper box 23 is shielded from a static contact; the upper crank arm 38.11 will rotate upward around the first pin 38.6 to return under the action of the torsion spring 38.22, the lower connecting plate 38.13 connected with the upper crank arm 38.11 through the fourth pin 38.2 moves upward, the lower baffle plate 38.15 connected with the lower connecting plate 38.13 through the fifth pin 38.14 moves upward along the guide rod 38.18 assembled on the bracket 38.1, and the lower stationary contact box 23 is shielded at the moment, so that the removable metering vehicle 15 is completely isolated from the charged body. The small bus chamber on the top of the cabinet consists of an upper frame 8, a second hinge 33 and a small bus chamber cover plate 34, a small bus support 35 is arranged inside, and a small bus 36 fixed on the small bus support 35 is a communicating conductor between the locking electromagnet coil 15.40 and other equipment in the electromagnetic lock 42 cabinet and a control power supply, so that the connection and the leading of the control power supply are facilitated.

Claims (1)

1. A high-voltage metal armored movable metering cabinet is characterized by being formed by connecting a movable metering vehicle and a metal armored cabinet;

the movable metering car comprises a high-voltage current transformer, a voltage transformer, a car body frame, a movable contact arm, a movable contact, a secondary wire, a secondary wiring plug, a pressing plate and a chassis car; the high-voltage current transformer and the voltage transformer are assembled on a vehicle body frame through bolts, a movable contact arm is connected to a wire inlet and outlet seat of a primary conductive loop through bolts, a movable contact is assembled at the end part of the movable contact arm through a binding spring, the wire outlet seat of the primary conductive loop is connected with the voltage transformer through an insulated wire, secondary wiring terminals of the high-voltage current transformer and the voltage transformer are connected to a secondary wiring special plug through wires, a pressing plate is fixed on two sides of the vehicle body frame through bolts, a second support is fixed on a bottom plate of the vehicle body frame, a locking electromagnet is installed on the second support, a locking rod of the locking electromagnet is installed in the middle of a locking electromagnet coil, and the vehicle body frame is fixed on a chassis vehicle through bolts; the screw rod is assembled on the positioning frame through the first shaft sleeve, the second shaft sleeve and the expansion pin, the limiting plate is connected to the positioning frame through a rivet, the handle penetrates through the through strip hole of the positioning frame to be connected with the positioning plate bolt, and the tension spring is assembled on the positioning frame and the positioning plate; the screw nut, the guide sleeve, the first bracket and the torsion spring bracket are assembled on the chassis vehicle frame; a pin shaft is arranged on the first support, a locking plate is arranged on the pin shaft, a torsion spring is sleeved on the pin shaft and clamped between the locking plate and the torsion spring support, and the wheel is assembled on the movable frame through the pin shaft; the screw rod is assembled with the screw nut and the guide sleeve, and the limiting plate is assembled with the first bracket, the torsional spring bracket and the locking plate to connect the positioning frame with the bullet train frame to form a chassis train; the screw rod is provided with a first interlocking stop block and a second interlocking stop block; the power supply loop of the locking electromagnet coil is connected in series with an auxiliary switch normally-closed point of the main power-receiving switch cabinet circuit breaker, only when the main power-receiving switch cabinet circuit breaker is in a brake-off state, the power supply loop of the locking electromagnet coil can be switched on, the locking electromagnet coil is electrified, the locking electromagnet lock rod is retracted, a lock plate on the chassis limited by the locking electromagnet lock rod is unlocked, and the lock plate can be lifted;

the metal armored cabinet comprises a bottom plate, a front lower door, a front middle door, a first hinge, a left side plate, a wall bushing, a front upper door, an upper brow, a right side plate, a lead seal stud, a first door lock, a front middle upper cross beam, a front middle lower clapboard, a left guide rail, a two-layer door device, a right guide rail, a sensor, an installation beam, a rear lower door, a conductive copper bar, a static contact box, a static contact, a rear middle cross beam, a main bus chamber sealing plate, a rear upper door, a top plate, a middle clapboard, a middle upper clapboard, an instrument chamber sealing plate, a second hinge, a small bus chamber cover plate, a small bus bracket, a secondary interlocking device, a valve device, a middle lower clapboard, an electricity testing window, a second door lock, an electromagnetic lock, a bolt, a second hinge and an electrified display; the cabinet body is connected with a front middle-upper crossbeam, an instrument room sealing plate, a front middle-lower clapboard, a main bus room sealing plate, a middle clapboard, a middle-upper clapboard and a middle-lower clapboard through bolts, the cabinet body is divided into four compartments of an instrument room, a metering vehicle room, a main bus room and a bus return room, a two-layer door device is arranged in the instrument room, and a gauge meter, a test box and a negative control device are arranged on the two-layer door device; the metering car chamber is provided with a left guide rail, a right guide rail, a valve device and a secondary interlocking device, so that the metering car can be conveniently positioned and moved in the metering car chamber, the metering car can be completely isolated from a charged body when the metering car is switched between a test position and a working position in the metering chamber due to the installation of the valve device, and the secondary interlocking device is installed to prevent the metering car from being plugged with a secondary plug under load when in the working position; a static contact box is arranged on the middle partition plate, a conductive copper bar and a static contact are arranged in the static contact box, so that the metering car chamber, the main bus chamber and the bus return line chamber are interconnected, when the metering car is pushed to a working position from a test position, a movable contact of the metering car is spliced with the static contact arranged in the static contact box, and a primary conductive loop is formed; a wall bushing is installed on a left side plate in a main bus chamber, an insulator is installed on a main bus chamber sealing plate, a main conductive copper bar is installed on the insulator and connected with branch conductive copper bars, a wall bushing is installed on a left side plate in a bus return line chamber, an installation beam is installed in the bus return line chamber, a sensor is installed on the installation beam, a main conductive copper bar is installed on the sensor and connected with the branch conductive copper bars, and therefore a power supply loop is formed by metering equipment, main powered switch cabinets, voltage transformer cabinets and switch equipment of feeder cabinets; one end of each of the front upper door, the front middle door, the front lower door, the rear upper door and the rear lower door is respectively connected with the left side plate through a first hinge, and the other end of each of the front upper door, the front middle door, the front lower door, the rear upper door and the rear lower door is respectively connected with the right side plate through a first door lock; the lead sealing stud is arranged on the right side plate, and when the front upper door, the front middle door, the front lower door and the rear lower door are closed, the lead sealing stud penetrates through the through hole on the door, so that a metering lead sealing is conveniently added and installed by a metering department, and the electricity stealing phenomenon is prevented; the rear lower door and the rear upper door are provided with a chain, the rear lower door can be closed only by closing the rear upper door firstly, an electromagnetic lock is arranged on the rear lower door, an electromagnetic lock coil and an electrified display auxiliary point are connected in series by using a lead, only when a primary conductive loop is not electrified, the electrified display auxiliary point is closed, the electromagnetic lock coil is electrified, the electromagnetic lock can be opened, the rear lower door can be opened, otherwise, the electromagnetic lock coil cannot be opened, and the requirement of five-prevention interlocking of a power system for preventing mistaken entering into an electrified interval is met; the live display is arranged on the rear lower door and is connected with the secondary output binding post of the sensor, so that whether the main bus is live or not can be judged visually; one side of the electricity testing window is connected with the rear lower door through a second hinge, the other side of the electricity testing window is connected with the rear lower door through a second door lock, and the electricity testing window is arranged to provide convenience for electricity testing of the main conductive loop; the brow, the hinge II and the cover plate of the small bus chamber form a small bus chamber, a small bus support is arranged in the small bus chamber, and a conductive copper bar fixed on the small bus support is a communicating conductor between a locking electromagnet coil, an electromagnetic lock and other equipment in the cabinet and a control power supply, so that the connection and the leading of the control power supply are facilitated.

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