Lower cabinet door interlocking device and environment-friendly high-voltage metering cabinet based on interlocking device

Abstract

The utility model discloses a lower cabinet door interlocking device and an environment-friendly high-voltage metering cabinet based on the interlocking device, and relates to the technical field of electrical equipment, the lower cabinet door interlocking device is installed inside a meter chamber of the environment-friendly high-voltage metering cabinet, and the lower cabinet door interlocking device comprises a mechanical lock mounting plate arranged at one side of the bottom end of the meter chamber, a mechanical lock box is arranged on one side of the mechanical lock mounting plate, a mechanical lock body is arranged on one side of the mechanical lock box in a penetrating mode, a mechanical lock key is arranged on the inner side of the mechanical lock body, and a mechanical lock rod matched with the mechanical lock body is arranged at one end of the mechanical lock box in a penetrating mode. The high-voltage metering cabinet is reasonable and reliable in structure, adopts a double-interlocking structural form of mechanical interlocking and electrical interlocking, takes mechanical interlocking as a main part and electrical interlocking as an auxiliary part, changes the structure of the metering cabinet, improves the operation convenience and safety of the high-voltage metering cabinet, and effectively solves the problems of clamping stagnation, deformation and unreliability of a traditional electrical interlocking device.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a lower cabinet door interlocking device and an environmentally friendly high-voltage metering cabinet based on the interlocking device. Background Art

[0002] High-voltage metering cabinets play an important role in the power system and are responsible for the opening and closing, control and protection of electrical equipment in the process of power generation, transmission, transformation, distribution and energy conversion. To ensure safe operation and prevent misoperation, high-voltage metering cabinets need to be equipped with interlocking devices based on the "five-protection interlocking" principle; the five-protection interlocking functions of high-voltage switchgear include: preventing disconnecting and closing of disconnectors under load, preventing accidental opening and closing of circuit breakers, load switches and contactors, preventing closing of circuit breakers and load switches when the grounding switch is closed, preventing accidental closing of grounding switches when energized, and preventing accidental entry into energized intervals.

[0003] At present, the common high-voltage metering cabinets on the market mostly adopt a hinged fixed structure, that is, the left sides of the upper cabinet door and the lower cabinet door are fixed to the left side plate of the cabinet body through the upper cabinet door hinge and the lower cabinet door hinge respectively, and the right side is fixed through a door lock. The electromagnetic lock is equipped in the middle position on the right side of the lower cabinet door, and a locking rod is provided on the lock. The electromagnetic lock baffle and fixing rivets are provided on the right side plate of the cabinet body. When power is supplied, the operator needs to close the upper cabinet door and the lower cabinet door, and rotate the door lock to the locking position. At the same time, the electromagnetic lock is turned to the locking position, so that the locking rod moves to the right to the electromagnetic lock baffle hole, thereby preventing the lower cabinet door from opening, achieving the purpose of protection and avoiding accidentally entering the live interval.

[0004] The interlocking device of the existing high-voltage metering cabinet mainly realizes the locking function by installing an electromagnetic lock. However, such interlocking devices often have the following defects: First, the electromagnetic lock is directly installed on the cabinet as a secondary component, which is easily affected by environmental factors and has poor stability. In addition, the electromagnetic lock has a simple structure and relies on the principle of electromagnetic adsorption. Improper operation or abnormal use may cause damage to the lock; secondly, the electromagnetic lock may be affected by surrounding electromagnetic interference, such as elevators, telephones, radio waves, etc., which may affect the normal operation of the lock body; in addition, the electromagnetic lock is usually set in the middle of the right side of the lower cabinet door in such high-voltage metering cabinets. Due to the large size of the cabinet door, even if the locking rod is restricted by the electromagnetic lock baffle, if the lock is stuck during operation and maintenance, it may still be accidentally opened through the gap of the cabinet door, damaging the lock, thereby causing safety risks for operation and maintenance personnel during maintenance, increasing the possibility of accidentally entering the energized interval, and posing a potential hidden danger to personnel safety.

[0005] Therefore, there is an urgent need for a lower cabinet door interlocking device and an environmentally friendly high-voltage metering cabinet based on the interlocking device, which can adopt a dual interlocking structure of mechanical interlocking and electrical interlocking, with mechanical interlocking as the main and electrical interlocking as the auxiliary, and change the structure of the metering cabinet to solve the problem that the electrical interlocking device in the existing high-voltage metering cabinet is prone to sticking and deformation, and improve the power supply reliability of the high-voltage metering cabinet.

[0006] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the utility model provides a lower cabinet door interlocking device and an environmentally friendly high-voltage metering cabinet based on the interlocking device, which has the advantages of mainly mechanical interlocking and supplemented by electrical interlocking, and changes the structure of the metering cabinet, which can effectively avoid the risk of misoperation caused by the stability problem of the electromagnetic lock itself, and thus solves the problem that the existing interlocking device directly installs the electromagnetic lock as a secondary component on the cabinet, which is easily affected by environmental factors, has poor stability, and may cause safety risks to operation and maintenance personnel during the maintenance process, increasing the possibility of accidentally entering the energized interval.

[0009] (II) Technical solution

[0010] In order to achieve the above advantages of mainly mechanical interlocking and supplemented by electrical interlocking, and changing the structure of the metering cabinet, the risk of misoperation caused by the stability problem of the electromagnetic lock itself can be effectively avoided. The specific technical solutions adopted by the utility model are as follows:

[0011] According to one aspect of the utility model, a lower cabinet door interlocking device is provided, which is installed inside a meter chamber of an environmentally friendly high-voltage metering cabinet. The lower cabinet door interlocking device includes a mechanical lock mounting plate arranged on one side of the bottom end of the meter chamber, a mechanical lock box is arranged on one side of the mechanical lock mounting plate, a mechanical lock body is penetrated through one side of the mechanical lock box, a mechanical lock key is arranged inside the mechanical lock body, and a mechanical lock rod matching the mechanical lock body is penetrated through one end of the mechanical lock box.

[0012] Furthermore, in order to achieve the cooperation between the mechanical lock mounting plate and the mechanical lock box, enhance the stability and safety of the mechanical lock, reduce the influence of electromagnetic interference, and ensure the reliable operation of the lower cabinet door interlocking device in a complex environment, a transverse hinge is provided at the bottom end of the mechanical lock mounting plate, and a plurality of fixing screws are penetrated through the top of the transverse hinge, a longitudinal hinge is provided on one side of the mechanical lock mounting plate, an interlocking plate is provided on one side of the longitudinal hinge, a first hook is provided at one end of the longitudinal hinge, a reset spring is provided at one end of the first hook, movable slide grooves are provided at the top and bottom of the interlocking plate, and an upper positioning pin is provided in the movable slide groove at the top, and a lower positioning pin is provided in the movable slide groove at the bottom; a protruding block is provided on one side of the middle part of the interlocking plate, a second hook cooperating with the reset spring is provided at one end of the protruding block, and an interlocking plate hook is provided at the bottom end of the interlocking plate.

[0013] According to another aspect of the utility model, an environmentally friendly high-voltage metering cabinet is also provided, which includes a cabinet body, a left side panel of the metering cabinet is arranged on one side of the cabinet body, a right side panel of the metering cabinet is arranged on the other side of the cabinet body, a metering transformer chamber is arranged at the inner bottom end of the cabinet body, a metering meter chamber is arranged at the top of one side of the metering transformer chamber, and a metering control box is arranged at the top of the metering meter chamber.

[0014] Furthermore, in order to achieve effective isolation and interlocking between the metering transformer room and the meter room, improve the safety of operators, and facilitate maintenance and inspection, a metering cabinet grounding bus is provided on one side of the bottom end of the metering transformer room, a metering voltage transformer is provided in the middle of the bottom end of the metering transformer room, a metering cabinet lower door is provided on one side of the metering transformer room, a plurality of lower door handles are provided on one side of the lower door of the metering cabinet, a metering cabinet maintenance observation window is provided in the middle of one side of the lower door of the metering cabinet, an electromagnetic lock is provided on the top of one side of the lower door of the metering cabinet, and a plurality of lower door limit nails are provided through both ends of the lower door of the metering cabinet.

[0015] Furthermore, in order to achieve the coordination between the lower cabinet door interlocking device and the upper cabinet door, effectively prevent misoperation during the operation of the high-voltage metering cabinet, optimize the internal space layout, and improve the reliability and safety of the equipment, an upper cabinet door of the metering cabinet is arranged on one side of the metering meter room, and a lower cabinet door interlocking device cooperating with the upper cabinet door of the metering cabinet is arranged on one side of the bottom end of the metering meter room, a plurality of metering junction boxes are arranged at the bottom end of one side of the metering meter room, a metering watt-hour meter is arranged at the top end of one side of the metering meter room, and an electromagnetic locking rod baffle of the metering cabinet is arranged at the bottom end of the other side of the metering meter room.

[0016] Furthermore, in order to enhance the expansibility and connection convenience of the metering cabinet through the configuration of the left hook plate and the right hook plate of the metering cabinet, as well as the setting of the side extended bus socket, a left hook plate of the metering cabinet is provided at the bottom end of one side of the left plate of the metering cabinet, a right hook plate of the metering cabinet is provided at the bottom end of one side of the right plate of the metering cabinet, and side extended bus sockets are symmetrically provided at the top ends of the left plate and the right plate of the metering cabinet; a sensor is provided at the top of the right plate of the metering cabinet, a metering current transformer is provided in the middle of the right plate of the metering cabinet, and a connecting busbar connected to the side extended bus socket is provided at one end of the metering current transformer.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a lower cabinet door interlocking device and an environmentally friendly high-voltage metering cabinet, which have the following beneficial effects:

[0019] (1) The utility model has a reasonable and reliable structure. It adopts a dual interlocking structure of mechanical interlocking and electrical interlocking, with mechanical interlocking as the main and electrical interlocking as the auxiliary. It also changes the structure of the metering cabinet, which not only improves the convenience and safety of high-voltage metering cabinet operation, but also effectively solves the problems of sticking, deformation and unreliability of traditional electrical interlocking devices, provides a strong guarantee for the stable operation of the power system, helps to extend the service life of equipment, reduce maintenance costs, and provide a safer working environment for operators.

[0020] (2) By setting up an environmentally friendly high-voltage metering cabinet, the structural form of the existing high-voltage metering cabinet is changed, the hinge structure is cancelled, the upper door of the metering cabinet is enlarged, and a direct hanging form is adopted. The upper door of the metering cabinet is fixed with a screw-type fixing structure, and an electromagnetic lock device is arranged on the inside of the upper door; at the same time, the size of the lower door of the metering cabinet is minimized, the installation method of the lower door is an up and down lifting method, and a mechanical interlocking device is arranged on the inside of the lower door. Through this innovative design, not only the convenience and safety of operation are improved, but also the environmental protection concept is reflected in the material selection and structural optimization. The traditional hinge structure is cancelled, and a direct hanging and screw-type fixing structure is adopted, which reduces unnecessary metal use, reduces energy consumption and material waste, conforms to the green and environmentally friendly production concept, improves power supply reliability, achieves energy conservation and emission reduction, and provides strong support for the construction of a green power grid.

[0021] (3) By setting up a lower cabinet door interlock device, a set of mechanical interlocks is set up in the metering transformer room, which is used together with the electromagnetic lock on the lower cabinet door of the metering cabinet to achieve mechanical locking. This double insurance design further enhances the power supply reliability of the product and reduces the risk caused by interlock system failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of the lower cabinet door interlocking device according to an embodiment of the utility model;

[0024] Figure 2 It is a partial structural schematic diagram of the lower cabinet door interlocking device according to an embodiment of the utility model;

[0025] Figure 3 It is a structural schematic diagram of an environmentally friendly high-voltage metering cabinet according to an embodiment of the utility model;

[0026] Figure 4 is a structural schematic diagram of an environmentally friendly high-voltage metering cabinet according to an embodiment of the utility model from another angle;

[0027] Figure 5 yes Figure 3 A partial enlarged view of the middle A;

[0028] Figure 6 yes Figure 3 A partial enlarged view of point B in the middle;

[0029] Figure 7 It is a structural schematic diagram of a lower cabinet door of a metering cabinet in an environmentally friendly high-voltage metering cabinet according to an embodiment of the utility model.

[0030] In the figure:

[0031] 1. Grounding bar of metering cabinet; 2. Lower door of metering cabinet; 201. Interlocking hook plate of lower door; 3. Door handle of lower door; 4. Inspection window of metering cabinet; 401. Fixing nut of observation window; 5. Electromagnetic lock; 501. Lock body of electromagnetic lock; 502. Lock rod of electromagnetic lock; 6. Upper door of metering cabinet; 7. Hook plate on the left side of metering cabinet; 8. Interlocking device of lower door; 801. Key of mechanical lock; 802. Lock body of mechanical lock; 803. Lock box of mechanical lock; 804. Installation plate of mechanical lock; 805. Upper positioning pin; 806. Movable slide; 807. Interlocking plate; 808. Machine Mechanical lock rod; 809, fixing screw; 810, lower positioning pin; 8011, reset spring; 8012, interlocking plate hook; 9, metering junction box; 10, left side plate of metering cabinet; 11, metering watt-hour meter; 12, metering control box; 13, right side hook plate of metering cabinet; 14, lower cabinet door limit nail; 15, side extension bus socket; 16, sensor; 17, connecting busbar; 18, metering current transformer; 19, metering voltage transformer; 20, metering cabinet electromagnetic lock rod baffle; 21, meter room; 22, metering transformer room; 23, right side plate of metering cabinet. DETAILED DESCRIPTION

[0032] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0033] According to an embodiment of the utility model, a lower cabinet door interlocking device and an environmentally friendly high-voltage metering cabinet based on the interlocking device are provided.

[0034] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-Figure 2As shown, according to an embodiment of the utility model, a lower cabinet door interlocking device is provided, and the lower cabinet door interlocking device 8 is installed inside the meter chamber 21 of the environmental protection high-voltage metering cabinet. The lower cabinet door interlocking device 8 includes a mechanical lock mounting plate 804 arranged on one side of the bottom end of the meter chamber 21, and a mechanical lock box 803 is arranged on one side of the mechanical lock mounting plate 804. A mechanical lock body 802 is penetrated on one side of the mechanical lock box 803, and a mechanical lock key 801 is arranged on the inner side of the mechanical lock body 802. A mechanical lock rod 808 matching the mechanical lock body 802 is penetrated at one end of the mechanical lock box 803.

[0035] With the help of the above-mentioned technical scheme of the utility model, the structure of the utility model is reasonable and reliable. Through the double interlocking structure of mechanical interlocking and electrical interlocking, mechanical interlocking is mainly used and electrical interlocking is supplemented, and the structure of the metering cabinet is changed. It not only improves the operating convenience and safety of the high-voltage metering cabinet, but also effectively solves the problems of jamming, deformation and unreliability of traditional electrical interlocking devices, provides a strong guarantee for the stable operation of the power system, helps to extend the service life of equipment, reduce maintenance costs, and provide a safer working environment for operators.

[0036] In one embodiment, a transverse hinge is provided at the bottom end of the mechanical lock mounting plate 804, and a plurality of fixing screws 809 are provided through the top of the transverse hinge. A longitudinal hinge is provided on one side of the mechanical lock mounting plate 804, and an interlocking plate 807 is provided on one side of the longitudinal hinge. A first hook is provided at one end of the longitudinal hinge, and a return spring 8011 is provided at one end of the first hook. A movable slide groove 806 is provided at the top and bottom of the interlocking plate 807, and an upper positioning pin 805 is provided in the movable slide groove 806 at the top, and a lower positioning pin 8010 is provided in the movable slide groove 806 at the bottom. A protruding block is provided on one side of the middle part of the interlocking plate 807, and a second hook matching the return spring 8011 is provided at one end of the protruding block, and an interlocking plate hook 8012 is provided at the bottom end of the interlocking plate 807, thereby realizing the cooperation between the mechanical lock mounting plate 804 and the mechanical lock box 803, enhancing the stability and safety of the lower cabinet door interlocking device 8, reducing the influence of electromagnetic interference, and ensuring the reliability of operation in complex environments.

[0037] In addition, it should be noted that in actual application, a notch is designed in the middle of the interlocking plate 807. When the right end of the mechanical lock rod 808 enters the mechanical lock body 803, the interlocking plate 807 can move freely up and down under the positioning of the upper positioning pin 805 and the lower positioning pin 8010.

[0038] The mechanical lock rod 808 has a slot in the middle, and the end of the mechanical lock body 802 goes deep into the mechanical lock rod 808. After the mechanical lock key 801 is inserted, the mechanical lock body 802 rotates clockwise or counterclockwise to drive the mechanical lock rod 808 to move right or left.

[0039] The working principle of the lower cabinet door interlock device 8 is as follows: when power supply is required, first, insert the mechanical lock key 801 into the mechanical lock body 802 and rotate it counterclockwise. At this time, the mechanical lock key 801 will drive the mechanical lock rod 808 together with the mechanical lock body 802 to move into the mechanical lock box 803. After rotating 90° counterclockwise, the right end of the mechanical lock rod 808 enters the mechanical lock box 803. At this time, the interlock plate 807 can move up and down in the movable slide groove 806 under the positioning of the upper positioning pin 805 and the lower positioning pin 10. Due to the action of the reset spring 8011, the interlock plate 807 is kept in the upper state (only when the lower cabinet door 2 of the metering chamber is hung up, the interlock plate 807 is pressed down by the lower cabinet door interlock hook plate 201 on the lower cabinet door 2 of the metering chamber, and the reset spring 8011 is stretched).

[0040] Close the lower cabinet door 2 of the metering room, lift the lower cabinet door handle 3 to make the lower cabinet door 2 of the metering room close to the metering cabinet, and the upper edge of the electromagnetic lock rod 5 on the lower cabinet door 2 of the metering cabinet will press against the lower edge of the electromagnetic lock rod 20 of the metering cabinet. At this time, the lower cabinet door interlocking hook plate 201 on the lower cabinet door 2 of the metering room will jam the interlocking plate hook 8012. When the lower cabinet door 2 of the metering room is close to the cabinet body of the metering cabinet, press the lower cabinet door 2 of the metering room downward so that the lower cabinet door limit screw 14 is completely stuck in the groove on the hook plate 7 on the left side of the metering cabinet and the hook plate 13 on the right side of the metering cabinet. The interlocking plate 807 will move downward under the action of the gravity of the lower cabinet door 2 of the metering room, and the reset spring 8011 will be stretched.

[0041] Insert the mechanical lock key 801 into the mechanical lock body 802 and rotate it 90 degrees clockwise. The mechanical lock key 801 and the mechanical lock body 802 will drive the mechanical lock rod 808 to move to the right, that is, the right end of the mechanical lock rod 808 extends into the notch on the interlocking rod 807. At this time, the mechanical lock rod 808 is stuck in the notch on the interlocking plate 807, preventing the interlocking plate 807 from moving upward. At this time, the lower cabinet door 2 of the metering room will be prevented from moving upward, thereby completing the mechanical interlocking operation through the lower cabinet door interlocking device 8.

[0042] According to another embodiment of the present invention, Figure 3-Figure 7 As shown, an environmentally friendly high-voltage metering cabinet is also provided, which includes a cabinet body, a left side panel 10 of the metering cabinet is arranged on one side of the cabinet body, a right side panel 23 of the metering cabinet is arranged on the other side of the cabinet body, a metering transformer chamber 22 is arranged at the bottom inner end of the cabinet body, a metering meter chamber 21 is arranged at the top of one side of the metering transformer chamber 22, and a metering control box 12 is arranged at the top of the metering meter chamber 21.

[0043] In one embodiment, a metering cabinet grounding bar 1 is provided on one side of the bottom end of the metering transformer room 22, a metering voltage transformer 19 is provided in the middle of the bottom end of the metering transformer room 22, a metering cabinet lower door 2 is provided on one side of the metering transformer room 22, a plurality of lower door handles 3 are provided on one side of the metering cabinet lower door 2, a metering cabinet maintenance observation window 4 is provided in the middle of one side of the metering cabinet lower door 2, an electromagnetic lock 5 is provided on the top of one side of the metering cabinet lower door 2, and a plurality of lower door limit nails 14 are provided through both ends of the metering cabinet lower door 2, thereby realizing effective isolation and interlocking between the metering transformer room 22 and the meter meter room 21, improving the safety of the operator, and facilitating maintenance and overhaul.

[0044] In one embodiment, an upper cabinet door 6 of a meter cabinet is provided on one side of the meter chamber 21, a lower cabinet door interlocking device 8 cooperating with the upper cabinet door 6 of the meter cabinet is provided on one side of the bottom end of the meter chamber 21, a plurality of metering junction boxes 9 are provided at the bottom end of one side of the meter chamber 21, a metering watt-hour meter 11 is provided at the top end of one side of the meter chamber 21, and a meter cabinet electromagnetic locking rod baffle 20 is provided at the bottom end of the other side of the meter chamber 21, thereby realizing the cooperation between the lower cabinet door interlocking device 8 and the upper cabinet door 6, effectively preventing misoperation during the operation of the high-voltage meter cabinet, optimizing the internal space layout, and improving the reliability and safety of the equipment.

[0045] In one embodiment, a left hook plate 7 of the metering cabinet is provided at the bottom end of one side of the left side plate 10 of the metering cabinet, a right hook plate 13 of the metering cabinet is provided at the bottom end of one side of the right side plate 23 of the metering cabinet, and a side extended bus socket 15 is symmetrically provided at the top of the left side plate 10 of the metering cabinet and the right side plate 23 of the metering cabinet; a sensor 16 is provided at the top of the right side plate 23 of the metering cabinet, a metering current transformer 18 is provided in the middle of the right side plate 23 of the metering cabinet, and a connecting busbar 17 connected to the side extended bus socket 15 is provided at one end of the metering current transformer 18, thereby realizing the configuration of the left hook plate 7 of the metering cabinet and the right hook plate 13 of the metering cabinet, and the setting of the side extended bus socket 15, thereby enhancing the expansibility and connection convenience of the metering cabinet.

[0046] In addition, it should be noted that in actual application, the lower cabinet door handle 3, the metering cabinet maintenance observation window 4, the electromagnetic lock 5, and the lower cabinet door limit nails are installed on the lower cabinet door 2 of the metering cabinet; the left hook plate 7 of the metering cabinet and the right hook plate 13 of the metering cabinet are respectively installed on the left plate and the right plate of the metering cabinet; the mechanical interlocking device 8, the metering junction box 9, and the metering electric meter 11 are respectively installed in the metering room; the structure of the metering cabinet is, from top to bottom, the metering control room 12, the metering meter room 21, and the metering transformer room 22, the metering upper cabinet door 6 is installed outside the metering meter room, and the metering cabinet lower cabinet door 2 is installed outside the metering transformer room.

[0047] The upper door 6 of the metering cabinet is connected to the cabinet body of the metering cabinet by hanging and then fixed by screws, and the lower door 2 of the metering cabinet is fixed to the cabinet body of the metering cabinet by lifting and pressing up and down.

[0048] The working principle of the environmental protection high-voltage metering cabinet during power transmission operation is:

[0049] 1) Insert the mechanical lock key 801 into the mechanical lock body 802 and rotate it counterclockwise. At this time, the mechanical lock key 801 will drive the mechanical lock rod 808 together with the mechanical lock body 802 to move into the mechanical lock box 803. After rotating 90° counterclockwise, the right end of the mechanical lock rod 808 enters the mechanical lock box 803. At this time, the interlocking plate 807 can move up and down in the movable slide groove 806 under the positioning of the upper positioning pin 805 and the lower positioning pin 10, so that under the action of the reset spring 8011, the interlocking plate 807 remains in the upper state (only when the lower cabinet door 2 of the metering chamber is hung up, the interlocking plate 807 is pressed down by the lower cabinet door interlocking hook plate 201 on the lower cabinet door 2 of the metering chamber, and the reset spring 8011 is stretched).

[0050] 2) Insert the special key of the electromagnetic lock 5 into the unlocking hole on the electromagnetic lock 5 and rotate it 90 degrees clockwise. The black slider on the electromagnetic lock 5 can slide to the unlocking state. At the same time, the electromagnetic lock rod 502 moves into the electromagnetic lock body 501 and retracts into the electromagnetic lock body 501.

[0051] 3) Close the lower cabinet door 2 of the metering room, lift the lower cabinet door handle 3 to make the lower cabinet door 2 of the metering room close to the metering cabinet, and the upper edge of the electromagnetic lock rod 5 on the lower cabinet door 2 of the metering cabinet will press against the lower edge of the electromagnetic lock rod 20 of the metering cabinet. At this time, the lower cabinet door interlocking hook plate 201 on the lower cabinet door 2 of the metering room will jam the interlocking plate hook 8012. When the lower cabinet door 2 of the metering room is close to the cabinet body of the metering cabinet, press the lower cabinet door 2 of the metering room downward so that the lower cabinet door limit screw 14 is completely stuck in the groove on the hook plate 7 on the left side of the metering cabinet and the hook plate 13 on the right side of the metering cabinet. The interlocking plate 807 will move downward under the action of the gravity of the lower cabinet door 2 of the metering room, and the reset spring 8011 will be stretched.

[0052] 4) Insert the mechanical lock key 801 into the mechanical lock body 802 and rotate it 90 degrees clockwise. The mechanical lock key 801 and the mechanical lock body 802 will drive the mechanical lock rod 808 to move to the right, that is, the right end of the mechanical lock rod 808 extends into the notch on the interlock rod 807. At this time, the mechanical lock rod 808 is stuck in the notch on the interlock plate 807, preventing the interlock plate 807 from moving upward. At this time, the lower cabinet door 2 of the metering chamber will be prevented from moving upward, thereby completing the mechanical interlock.

[0053] 5) Operate the electromagnetic lock 5 on the lower cabinet door 2 of the metering room to the locked state, and at the same time, the electromagnetic lock rod 502 moves in the opposite direction of the electromagnetic lock body 501, and the electromagnetic lock body 501 will extend to the electromagnetic lock rod baffle of the metering cabinet to prevent the lower cabinet door 2 of the metering room from moving upward, thereby completing the electrical interlock.

[0054] The working principle of the environmental protection high-voltage metering cabinet during power outage maintenance is as follows: first, after the power outage, confirm that the live indicator light on the cabinet door 6 on the metering cabinet is off; then, insert the special key of the electromagnetic lock 5 into the unlocking hole on the electromagnetic lock 5, rotate it 90 degrees clockwise, and the black slider on the electromagnetic lock 5 can slide to the unlocking state, and at the same time, the electromagnetic lock rod 502 moves into the electromagnetic lock body 501 and retracts into the electromagnetic lock body 501; then, insert the mechanical lock key 801 into the mechanical lock body 802 803, and then the mechanical lock key 801 and the mechanical lock body 802 will drive the mechanical lock rod 808 to move into the mechanical lock box 803. After rotating 90° counterclockwise, the right end of the mechanical lock rod 808 enters the mechanical lock box 803. At this time, the mechanical lock rod 808 no longer hinders the up and down movement of the interlocking plate 807. Finally, lift the lower cabinet door handle 3 to make the lower cabinet door 2 of the metering room close to the metering cabinet and lift it up. The cable room door will be opened, and subsequent power outage maintenance work can be carried out.

[0055] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0056] In actual application, when power is supplied, the operator first uses the mechanical lock key to unlock the lower cabinet door interlock device 8 (the working principle of the lower cabinet door interlock device 8 is as described above), and then uses the electromagnetic lock key to unlock the electromagnetic lock 5, and then closes and locks the lower cabinet door (the working principle of the environmental protection high-voltage metering cabinet is as described above). After ensuring that the double interlock is in place, the equipment can operate safely; during power outages and maintenance, the operator follows the opposite steps, first unlocking the electromagnetic lock 5 and the lower cabinet door interlock device 8, and then opening the lower cabinet door for maintenance. Through this design, the operator's safety is doubly protected in any state, while simplifying the operating process, reducing the risk of operating errors, and improving the safety and practicality of the design of the environmental protection high-voltage metering cabinet.

[0057] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lower cabinet door interlocking device, the lower cabinet door interlocking device (8) is installed inside a meter chamber (21) of an environmental protection high-voltage metering cabinet, characterized in that: The lower cabinet door interlock device (8) comprises a mechanical lock mounting plate (804) arranged on one side of the bottom end of the meter chamber (21); a mechanical lock box (803) is arranged on one side of the mechanical lock mounting plate (804); a mechanical lock body (802) is penetrated through one side of the mechanical lock box (803); a mechanical lock key (801) is arranged on the inner side of the mechanical lock body (802); and a mechanical lock rod (808) matching with the mechanical lock body (802) is penetrated through one end of the mechanical lock box (803).

2. A lower cabinet door interlocking device according to claim 1, characterized in that: A transverse hinge is arranged at the bottom end of the mechanical lock mounting plate (804), a plurality of fixing screws (809) are arranged through the top end of the transverse hinge, a longitudinal hinge is arranged at one side of the mechanical lock mounting plate (804), an interlocking plate (807) is arranged at one side of the longitudinal hinge, a first hook is arranged at one end of the longitudinal hinge, and a return spring (8011) is arranged at one end of the first hook.

3. A lower cabinet door interlocking device according to claim 2, characterized in that: The interlocking plate (807) is provided with a movable slide groove (806) at the top and the bottom, and an upper positioning pin (805) is provided in the movable slide groove (806) at the top, and a lower positioning pin (8010) is provided in the movable slide groove (806) at the bottom; A protruding block is provided on one side of the middle part of the interlocking plate (807), a second hook matching with the reset spring (8011) is provided at one end of the protruding block, and an interlocking plate hook (8012) is provided at the bottom end of the interlocking plate (807).

4. An environmentally friendly high-voltage metering cabinet, which realizes the switch cabinet door operation of the environmentally friendly high-voltage metering cabinet based on the lower cabinet door interlocking device described in any one of claims 1 to 3, characterized in that: The environmentally friendly high-voltage metering cabinet comprises a cabinet body, a left side panel (10) of the metering cabinet is arranged on one side of the cabinet body, a right side panel (23) of the metering cabinet is arranged on the other side of the cabinet body, a metering transformer chamber (22) is arranged at the inner bottom end of the cabinet body, a metering meter chamber (21) is arranged at the top end of one side of the metering transformer chamber (22), and a metering control box (12) is arranged at the top end of the metering meter chamber (21).

5. The environmentally friendly high-voltage metering cabinet according to claim 4 is characterized in that: A metering cabinet grounding bar (1) is arranged on one side of the bottom end of the metering transformer chamber (22); a metering voltage transformer (19) is arranged in the middle of the bottom end of the metering transformer chamber (22); a metering cabinet lower door (2) is arranged on one side of the metering transformer chamber (22); a plurality of lower door handles (3) are arranged on one side of the metering cabinet lower door (2); a metering cabinet maintenance observation window (4) is provided in the middle of one side of the metering cabinet lower door (2); an electromagnetic lock (5) is arranged on the top of one side of the metering cabinet lower door (2); and a plurality of lower door limit nails (14) are arranged through both ends of the metering cabinet lower door (2).

6. The environmentally friendly high-voltage metering cabinet according to claim 4 is characterized in that: A meter cabinet upper door (6) is arranged on one side of the meter chamber (21); a lower door interlocking device (8) cooperating with the meter cabinet upper door (6) is arranged on one side of the bottom end of the meter chamber (21); a plurality of metering junction boxes (9) are arranged on the bottom end of one side of the meter chamber (21); a metering watt-hour meter (11) is arranged on the top end of one side of the meter chamber (21); and a meter cabinet electromagnetic lock rod baffle (20) is arranged on the bottom end of the other side of the meter chamber (21).

7. The environmentally friendly high-voltage metering cabinet according to claim 4 is characterized in that: A left hook plate (7) of the metering cabinet is arranged at the bottom end of one side of the left side plate (10) of the metering cabinet, a right hook plate (13) of the metering cabinet is arranged at the bottom end of one side of the right side plate (23) of the metering cabinet, and side extension bus sockets (15) are symmetrically arranged at the top ends of the left side plate (10) of the metering cabinet and the right side plate (23) of the metering cabinet.

8. The environmentally friendly high-voltage metering cabinet according to claim 7 is characterized in that: A sensor (16) is arranged on the top of the right side plate (23) of the metering cabinet, a metering current transformer (18) is arranged in the middle of the right side plate (23) of the metering cabinet, and a connecting busbar (17) connected to the side extension busbar socket (15) is arranged at one end of the metering current transformer (18).

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