CN112103833A

CN112103833A - Low-voltage draw-out type switch cabinet

Info

Publication number: CN112103833A
Application number: CN202010984752.1A
Authority: CN
Inventors: 宋杰; 李伟
Original assignee: Anhui Zhengri Electric Co ltd
Current assignee: Anhui Zhengri Electric Co ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2020-12-18
Anticipated expiration: 2040-09-18
Also published as: CN112103833B

Abstract

The invention discloses a low-voltage draw-out type switch cabinet, relates to the technical field of switch cabinets, and aims to solve the problems that a drawer unit is difficult to insert and pull normally and the heat dissipation performance of the drawer unit is poor due to the fact that secondary plug connectors of the existing draw-out type switch cabinet are prone to misalignment and collision damage or deformation. The utility model discloses a switch cabinet, including switch cabinet body, drawer room, drawer chamber, secondary terminal room, guide cylinder and movable contact main part, the upper end of switch cabinet body is provided with the main bus-bar room, the below of main bus-bar room is provided with the drawer room, the rear of drawer room is provided with the cable chamber, the below of drawer room is provided with the secondary terminal room, the inside of drawer room is provided with big drawer and little drawer, and big drawer and little drawer all include the drawer plate body, the rear end of drawer plate body is provided with the movable contact mounting base, the one end of movable contact mounting base is provided with guide cylinder and movable contact main part, and movable contact mounting base and the equal fixed connection of guide cylinder and movable contact main part, the rear end of drawer.

Description

Low-voltage draw-out type switch cabinet

Technical Field

The invention relates to the technical field of switch cabinets, in particular to a low-voltage draw-out type switch cabinet.

Background

The draw-out type low-voltage cabinet is equipment responsible for completing electric energy control, protection, conversion and distribution in a low-voltage power supply system. The intelligent cabinet mainly comprises a bus, components (including a disconnecting switch, a circuit breaker, a fuse, a contactor, a thermal relay and the like), an instrument, a cabinet body and the like. The low-voltage draw-out type switch cabinet is widely applied to power distribution centers PC and motor control centers MCC of power plants, substations, factories, mining enterprises and high-rise buildings, and is used as a low-voltage complete set of power distribution device for power distribution and motor centralized control and reactive compensation in a power generation and supply system with the alternating current of 50-60Hz, the rated working voltage of 660V or below and the rated current of 4000A or below.

However, the secondary plug connectors of the existing draw-out switch cabinet are prone to misalignment and collision damage or deformation, so that the drawer unit is difficult to insert and pull normally, and the heat dissipation performance of the drawer unit is not good, and therefore the existing requirements are not met, and the low-voltage draw-out switch cabinet is provided.

Disclosure of Invention

The invention aims to provide a low-voltage draw-out switch cabinet, which solves the problems that secondary plug connectors of the existing draw-out switch cabinet in the background art are easy to be misaligned, and are easy to cause collision damage or deformation, so that a drawer unit is difficult to be normally plugged and pulled out, and the heat dissipation performance of the drawer unit is poor.

In order to achieve the purpose, the invention provides the following technical scheme: a low-voltage draw-out type switch cabinet comprises a switch cabinet body, wherein a main bus chamber is arranged at the upper end of the switch cabinet body, a drawer chamber is arranged below the main bus chamber, a cable chamber is arranged behind the drawer chamber, a secondary terminal chamber is arranged below the drawer chamber, a large drawer and a small drawer are arranged inside the drawer chamber and respectively comprise a drawer plate body, a movable contact mounting base is arranged at the rear end of the drawer plate body, one end of the movable contact mounting base is provided with a guide cylinder and a movable contact main body, the movable contact mounting base is fixedly connected with the guide cylinder and the movable contact main body, a mounting plate is arranged at the rear end of the drawer chamber, a static contact mounting base is arranged on the end surface of the mounting plate, one end of the static contact mounting base is provided with a guide pin and a static contact main body, and the guide pin is connected with the guide cylinder in a sliding manner, and the static contact mounting base is fixedly connected with the guide needle and the static contact main body, and the upper end of the switch cabinet body is provided with a pressure relief device.

Preferably, the rear end of the drawer plate body is provided with a plurality of radiating grooves and a plurality of threading holes, and the radiating grooves are located on two sides of the threading holes.

Preferably, a plurality of heat dissipation holes are formed in the two sides of the drawer plate body.

Preferably, the both sides of big drawer and little drawer all are provided with the gyro wheel, the inboard of drawer room is provided with the slide rail, and drawer room and slide rail pass through the screw connection, and gyro wheel and slide rail sliding connection, the side of slide rail is provided with the spout, the one end of gyro wheel is provided with the connecting rod, and the connecting rod runs through the spout, and connecting rod and spout sliding connection, and the equal fixed connection of connecting rod and big drawer and little drawer.

Preferably, the front end of slide rail is provided with guard flap, and guard flap passes through the spacing damping pivot with the slide rail and is connected, guard flap's inboard is provided with first magnetic adsorption strip, and first magnetic adsorption strip and guard flap fixed connection, be provided with second magnetic adsorption strip on the preceding terminal surface of slide rail, and second magnetic adsorption strip and slide rail fixed connection, and first magnetic adsorption strip and second magnetic adsorption strip magnetic adsorption.

Preferably, the front end of the large drawer is provided with a switch-on/switch-off switch, a main handle, two push-pull handles, a drawer lock, a green indicator light, a red indicator light and an auxiliary handle, the two push-pull handles are respectively positioned on two sides of the lower portion of the front end of the large drawer, and the drawer lock is positioned in the middle of the lower portion of the front end of the large drawer.

Preferably, the drawer plate body is connected with the moving contact mounting base through a screw, and the mounting plate is connected with the static contact mounting base through a screw.

Preferably, the mounting plate is connected with the switch cabinet body in a welding mode.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the guide cylinder is arranged at one end of the moving contact mounting base, the guide needle is arranged at one end of the static contact mounting base, the center lines of the guide needle and the guide cylinder are positioned at the same horizontal height, when the large drawer and the small drawer are drawn and pulled, the guide needle and the guide cylinder are matched with each other to play a role in guiding, gradual opening or gradual and combined action of the secondary plug connector is realized, before the static contact main body is contacted with the moving contact main body, the guide cylinder is firstly contacted and matched with the guide needle, the error when the static contact main body is plugged with the moving contact main body is eliminated, mechanical damage caused by the error between the static contact main body and the moving contact main body is avoided, the plugging safety and the service life of the static contact main body and the moving contact.

2. The end face of the drawer plate body is provided with the plurality of heat dissipation grooves and the plurality of heat dissipation holes, so that the heat dissipation effects of the large drawer and the small drawer are improved, a safe working environment can be provided for components inside the large drawer and the small drawer, the components are prevented from being damaged due to overhigh internal temperatures of the large drawer and the small drawer, the cabinet frame and the inner layer partition plate of the switch cabinet body are passivated or made of aluminum-zinc coated steel plates, the purpose of corrosion resistance is achieved, the switch cabinet body is easy to process, bright and white, resistant to fingerprints and heat, the arrangement and wiring can be guaranteed to be neat through the plurality of wire holes, the wiring is easy, attractive, and local maintenance is facilitated.

3. According to the invention, the protective baffle is additionally arranged at the front end of the sliding rail, the protective baffle and the sliding rail are fastened through the magnetic adsorption force between the first magnetic adsorption strip and the second magnetic adsorption strip, so that the large drawer and the small drawer can be protected, when the large drawer or the small drawer is pulled out, the protective baffle can block the rolling wheels of the large drawer and the small drawer, the large drawer and the small drawer are prevented from accidentally sliding out and falling, when the whole drawer needs to be pulled out, only a certain external force is applied to the protective baffle, so that the protective baffle rotates along the limiting damping rotating shaft, the blocking of the rolling wheels is relieved, and the safety of the large drawer and the small drawer in the pulling process is improved.

4. The invention has the advantages that the plurality of large drawers and the plurality of small drawers are arranged, the separation between the functional units and the compartments is clear and reliable, the work of other elements is not influenced by the fault of a certain unit, the fault is limited in the minimum range, the drawers with the same size can be interchanged, the flexibility in the use process is improved, once the fault occurs, the unit is drawn out, the standby drawer is inserted, and the power can be supplied, so the power failure time caused by the fault is greatly shortened, and the reliability of the equipment is improved.

Drawings

Fig. 1 is a front view of a low voltage draw-out switchgear of the present invention;

fig. 2 is a schematic structural diagram of a low-voltage draw-out type switch cabinet of the invention;

FIG. 3 is a schematic view of a large drawer according to the present invention;

FIG. 4 is a schematic view of a drawer panel according to the present invention;

FIG. 5 is a schematic structural diagram of the slide rail of the present invention;

FIG. 6 is an enlarged view of a portion of region A of the present invention;

FIG. 7 is a front view of a large drawer of the present invention;

fig. 8 is a schematic structural view of a static contact mounting base according to the present invention.

In the figure: 1. a switch cabinet body; 2. a main bus bar chamber; 3. a drawer chamber; 4. a large drawer; 5. a small drawer; 6. a drawer plate body; 7. a cable chamber; 8. a secondary terminal chamber; 9. a roller; 10. a slide rail; 11. a chute; 12. a connecting rod; 13. a protective baffle; 14. a first magnetic adsorption strip; 15. a limiting damping rotating shaft; 16. a second magnetic adsorption strip; 17. a guide cylinder; 18. a moving contact main body; 19. mounting a plate; 20. a static contact mounting base; 21. a guide needle; 22. a static contact main body; 23. a heat sink; 24. threading holes; 25. heat dissipation holes; 26. closing a switch; 27. opening a brake; 28. a main handle; 29. a push-pull handle; 30. a drawer lock; 31. a green indicator light; 32. a red indicator light; 33. an auxiliary handle; 34. the moving contact is provided with a base.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-8, an embodiment of the present invention: a low-voltage draw-out type switch cabinet comprises a switch cabinet body 1, a main bus chamber 2 is arranged at the upper end of the switch cabinet body 1, a gck horizontal bus adopts a top direct wire feeding type, a gcs horizontal bus and a mns horizontal main bus adopt a cabinet rear horizontal side wire feeding type, a drawer chamber 3 is arranged below the main bus chamber 2, a cable chamber 7 is arranged behind the drawer chamber 3, the connection of the device and an external cable is completed in the cable chamber 7, the cable can go in and out from the top to the bottom, so that the installation and maintenance are convenient, a secondary terminal chamber 8 is arranged below the drawer chamber 3, a large drawer 4 and a small drawer 5 are arranged inside the drawer chamber 3, the large drawer 4 and the small drawer 5 both comprise drawer plate bodies 6, a movable contact mounting base 34 is arranged at the rear end of the drawer plate bodies 6, a guide cylinder 17 and a movable contact main body 18 are arranged at one end of the movable contact mounting base 34, and the movable contact base 34 is fixedly connected with the guide cylinder 17 and, the rear end of the drawer chamber 3 is provided with a mounting plate 19, the end surface of the mounting plate 19 is provided with a static contact mounting base 20, one end of the static contact mounting base 20 is provided with a guide needle 21 and a static contact main body 22, the guide needle 21 is connected with the guide cylinder 17 in a sliding manner, the static contact mounting base 20 is fixedly connected with the guide needle 21 and the static contact main body 22, the guide needle 21 and the guide cylinder 17 are matched with each other to play a role in guiding, gradual opening or gradual combination action of the secondary plug-in connector is realized, before the static contact main body 22 is contacted with the movable contact main body 18, the guide cylinder 17 is firstly contacted and matched with the guide needle 21, errors in plug-in connection between the static contact main body 22 and the movable contact main body 18 are eliminated, mechanical damage caused by the errors between the two is avoided, so that the plug-in safety and the service life of the static contact main body, pressure that produces when trouble electric arc ignites forces pressure relief device to open, the gaseous row of scorching heat is to the cabinet top to guaranteed staff's safety, N, PE lines of cubical switchboard are in the rear lower place of the cubical switchboard of grapple, the PE line is connected with the tank bracket, it is more convenient not only to make the cable connection of being qualified for the next round of competitions, and ground connection is more reliable moreover, the top of cubical switchboard all is equipped with ventilation system with upper and lower ventilation door, same power distribution system, can match the restriction short-circuit current through the current-limiting reactor, it is at certain numerical value to stabilize the bus voltage.

Further, the rear end of the drawer plate body 6 is provided with a plurality of radiating grooves 23 and a plurality of through wires holes 24, and the radiating grooves 23 are located the both sides of through wires holes 24, the radiating effect of big drawer 4 and little drawer 5 is improved, can provide a safe operational environment for the inside components and parts of big drawer 4 and little drawer 5, avoid the inside high temperature of big drawer 4 and little drawer 5 to cause the damage of components and parts, a plurality of through wires holes 24 can guarantee the neatly of winding displacement wiring, the wiring is easy, comparatively pleasing to the eye and do benefit to local maintenance.

Further, the both sides of the drawer plate body 6 are provided with a plurality of heat dissipation holes 25, so that the heat dissipation effect of the large drawer 4 and the small drawer 5 is further improved, a safe working environment can be provided for components inside the large drawer 4 and the small drawer 5, and the damage of the components caused by the overhigh temperature inside the large drawer 4 and the small drawer 5 is avoided.

Further, the both sides of big drawer 4 and little drawer 5 all are provided with gyro wheel 9, the inboard of drawer chamber 3 is provided with slide rail 10, and drawer chamber 3 passes through screw connection with slide rail 10, and gyro wheel 9 and slide rail 10 sliding connection, the side of slide rail 10 is provided with spout 11, the one end of gyro wheel 9 is provided with connecting rod 12, and connecting rod 12 runs through spout 11, and connecting

rod

12 and 11 sliding connection of spout, and connecting rod 12 and the equal fixed connection of big drawer 4 and little drawer 5, slide along slide rail 10 through gyro wheel 9, can realize the push-and-pull action to big drawer 4 and little drawer 5.

Further, a protective baffle 13 is arranged at the front end of the slide rail 10, the protective baffle 13 is connected with the slide rail 10 through a limiting damping rotating shaft 15, a first magnetic adsorption strip 14 is arranged on the inner side of the protective baffle 13, the first magnetic adsorption strip 14 is fixedly connected with the protective baffle 13, a second magnetic adsorption strip 16 is arranged on the front end face of the slide rail 10, the second magnetic adsorption strip 16 is fixedly connected with the slide rail 10, the first magnetic adsorption strip 14 and the second magnetic adsorption strip 16 are magnetically adsorbed, the protective baffle 13 and the slide rail 10 are fastened through the magnetic adsorption force between the first magnetic adsorption strip 14 and the second magnetic adsorption strip 16, the large drawer 4 and the small drawer 5 can be protected, when the large drawer 4 or the small drawer 5 is drawn out, the protective baffle 13 can block the roller 9 of the large drawer 4 and the small drawer 5, and the large drawer 4 and the small drawer 5 are prevented from accidentally sliding out and falling, when the whole drawer is required to be pulled out, only a certain external force needs to be applied to the protective baffle 13, so that the protective baffle 13 rotates along the limiting damping rotating shaft 15, the blocking of the roller 9 is removed, and the safety of the large drawer 4 and the small drawer 5 in the pulling process is improved.

Further, the front end of the large drawer 4 is provided with a switch-on 26, a switch-off 27, a main handle 28, a push-pull handle 29, a drawer lock 30, a green indicator light 31, a red indicator light 32 and an auxiliary handle 33, the number of the push-pull handles 29 is two, the two push-pull handles 29 are respectively located on two sides below the front end of the large drawer 4, the drawer lock 30 is located in the middle below the front end of the large drawer 4, the main handle 28 is in the switch-off 27 state, the auxiliary handle 33 is in the pull-out state, the drawer can be pulled out or pushed in, the main handle 28 is in the switch-off 27 state, the auxiliary handle 33 is in the working position state, the main handle 28 can be in the switch-on 26 operation state, the green indicator light 31 represents the operation state, and.

Further, the drawer plate body 6 is connected with the moving contact mounting base 34 through screws, and the mounting plate 19 is connected with the static contact mounting base 20 through screws, so that the connection mode is simple, the mounting and the dismounting are convenient, and the maintenance and the replacement are facilitated.

Furthermore, the mounting plate 19 is welded with the switch cabinet body 1, the welded connection is good in air tightness and water tightness, the structural rigidity is also high, the structural integrity is good, labor and time are saved, the sectional area of the material is not reduced, and the material is fully utilized.

The working principle is as follows: when in use, the main handle 28 is in the state of opening the brake 27, the auxiliary handle 33 is in the state of being pulled out, the drawer can be pulled out or pushed in, the main handle 28 is in the state of opening the brake 27, the auxiliary handle 33 is in the state of working position, the main handle 28 can be switched on 26 to operate, the green indicating lamp 31 indicates the operating state, the red indicating lamp 32 indicates no power supply, because the guide cylinder 17 is arranged at one end of the movable contact mounting base 34, the guide pin 21 is arranged at one end of the static contact mounting base 20, the center lines of the guide pin 21 and the guide cylinder 17 are positioned at the same horizontal height, when the large drawer 4 and the small drawer 5 are pulled out, the guide pin 21 and the guide cylinder 17 are mutually matched to play a role of guiding, the gradual opening or gradual closing action of the secondary plug connector is realized, before the static contact main body 22 and the movable contact main body 18 are contacted, the guide cylinder 17 is firstly contacted and matched with the guide pin 21, the mechanical damage caused by errors is avoided, so that the inserting safety and the service life of the static contact main body 22 and the moving contact main body 18 are improved, the heat dissipation effects of the large drawer 4 and the small drawer 5 are improved due to the fact that the plurality of heat dissipation grooves 23 and the plurality of heat dissipation holes 25 are arranged on the end face of the drawer plate body 6, a safe working environment can be provided for components inside the large drawer 4 and the small drawer 5, the damage of the components caused by overhigh temperature inside the large drawer 4 and the small drawer 5 is avoided, the pressure relief device is arranged at the upper end of the switch cabinet body 1, the pressure generated when a fault is ignited is used for forcing the pressure relief device to be opened, glowing gas is discharged to the cabinet top of the switch cabinet body 1, so that the personnel safety is ensured, the plurality of threading holes 24 can ensure the orderliness of wiring, the wiring is easy to lay, the wiring is more attractive and is beneficial to local maintenance, the, the protective baffle 13 and the sliding rail 10 are fastened through the magnetic adsorption force between the first magnetic adsorption strip 14 and the second magnetic adsorption strip 16, the large drawer 4 and the small drawer 5 can be protected, when the large drawer 4 or the small drawer 5 is drawn out, the protective baffle 13 can block the roller 9 of the large drawer 4 and the small drawer 5, the large drawer 4 and the small drawer 5 are prevented from accidentally sliding out and falling off, when the whole drawer needs to be drawn out, only a certain external force is applied to the protective baffle 13, the protective baffle 13 rotates along the limiting damping rotating shaft 15, the blocking of the roller 9 is removed, the safety of the large drawer 4 and the small drawer 5 in the drawing process is improved, the separation between the functional units and the compartments of the whole switch cabinet body 1 is clear and reliable, the work of other elements is not influenced by the fault of a certain unit, and the fault is limited in the minimum range, and the drawers with the same size can be interchanged, the flexibility in the use process is improved, once a fault occurs, the unit is drawn out, the standby drawer is inserted, and power can be supplied, so that the power failure time caused by the fault is greatly shortened, the reliability of the equipment is improved, the switch cabinet body 1 adopts an analog-digital design, the switch cabinet body 1 is divided into three areas, the top is a bus area, the front is an electric appliance area, the rear is a cable outlet area, the electric appliance area and the cable area are separated by steel plates, so that the normal operation of a circuit is ensured, the fault expansion is effectively prevented, when an electric appliance element is drawn out of the cabinet, the electrified body in the cabinet is not exposed, and the use is safer and more reliable.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a low pressure pull-out type cubical switchboard, includes the cubical switchboard cabinet body (1), its characterized in that: the switch cabinet comprises a switch cabinet body (1), wherein a main bus chamber (2) is arranged at the upper end of the switch cabinet body (1), a drawer chamber (3) is arranged below the main bus chamber (2), a cable chamber (7) is arranged behind the drawer chamber (3), a secondary terminal chamber (8) is arranged below the drawer chamber (3), a large drawer (4) and a small drawer (5) are arranged inside the drawer chamber (3), the large drawer (4) and the small drawer (5) both comprise drawer plate bodies (6), a moving contact mounting base (34) is arranged at the rear end of each drawer plate body (6), a guide cylinder (17) and a moving contact main body (18) are arranged at one end of each moving contact mounting base (34), the moving contact mounting base (34) is fixedly connected with the guide cylinder (17) and the moving contact main body (18), and a mounting plate (19) is arranged at the rear end of the drawer chamber (3), the switch cabinet is characterized in that a static contact mounting base (20) is arranged on the end face of the mounting plate (19), one end of the static contact mounting base (20) is provided with a guide needle (21) and a static contact main body (22), the guide needle (21) is connected with the guide cylinder (17) in a sliding mode, the static contact mounting base (20) is fixedly connected with the guide needle (21) and the static contact main body (22), and a pressure relief device is arranged at the upper end of the switch cabinet body (1).

2. A low voltage draw-out switchgear as claimed in claim 1, wherein: the rear end of the drawer plate body (6) is provided with a plurality of radiating grooves (23) and a plurality of threading holes (24), and the radiating grooves (23) are located on two sides of the threading holes (24).

3. A low voltage draw-out switchgear as claimed in claim 1, wherein: and a plurality of heat dissipation holes (25) are formed in the two sides of the drawer plate body (6).

4. A low voltage draw-out switchgear as claimed in claim 1, wherein: the both sides of big drawer (4) and little drawer (5) all are provided with gyro wheel (9), the inboard of drawer room (3) is provided with slide rail (10), and drawer room (3) pass through screw connection with slide rail (10), and gyro wheel (9) and slide rail (10) sliding connection, the side of slide rail (10) is provided with spout (11), the one end of gyro wheel (9) is provided with connecting rod (12), and connecting rod (12) run through spout (11), and connecting rod (12) and spout (11) sliding connection, and connecting rod (12) and the equal fixed connection of big drawer (4) and little drawer (5).

5. A low voltage draw-out switchgear as claimed in claim 4, wherein: the front end of slide rail (10) is provided with guard flap (13), and guard flap (13) are connected through spacing damping pivot (15) with slide rail (10), the inboard of guard flap (13) is provided with first magnetic adsorption strip (14), and first magnetic adsorption strip (14) and guard flap (13) fixed connection, be provided with second magnetic adsorption strip (16) on the preceding terminal surface of slide rail (10), and second magnetic adsorption strip (16) and slide rail (10) fixed connection, and first magnetic adsorption strip (14) and second magnetic adsorption strip (16) magnetic adsorption.

6. A low voltage draw-out switchgear as claimed in claim 1, wherein: the front end of the big drawer (4) is provided with a switch-on part (26), a switch-off part (27), a main handle (28), two push-pull handles (29), a drawer lock (30), a green indicator light (31), a red indicator light (32) and an auxiliary handle (33), the number of the push-pull handles (29) is two, the two push-pull handles (29) are respectively positioned at two sides below the front end of the big drawer (4), and the drawer lock (30) is positioned in the middle below the front end of the big drawer (4).

7. A low voltage draw-out switchgear as claimed in claim 1, wherein: the drawer plate body (6) is connected with the moving contact mounting base (34) through screws, and the mounting plate (19) is connected with the static contact mounting base (20) through screws.

8. A low voltage draw-out switchgear as claimed in claim 1, wherein: the mounting plate (19) is connected with the switch cabinet body (1) in a welding mode.