Electric low-voltage drawer cabinet

Abstract

An electric low-voltage drawer cabinet comprises a cabinet body; a drawer; a driving device; the detection device comprises a detection rod installed on the back of the drawer, a metal block is arranged at one end of the detection rod, and the detection device further comprises a plurality of proximity switches. The control module is used for receiving the electric signal transmitted by the detection device, processing the information and transmitting the information to the driving device, the control module is electrically connected with the proximity switch, and the control module is electrically connected with the driving device; and the mode selection device is electrically connected with the control module. The drawer is pushed and pulled in an electric mode, so that the drawer is not influenced by the weight of the drawer, and the operation is labor-saving, simple and convenient; due to the fact that the motor is adopted for driving, it can be guaranteed that the drawer stably runs at the constant speed in the drawer pushing and pulling process; due to the fact that the inductance type proximity switch is adopted, it is guaranteed that the drawer can stop at the accurate position, and instrument damage caused by incorrect position when the drawer is manually pushed is avoided.

Description

Technical Field

[0001] The utility model relates to an electric low-voltage drawer cabinet, in particular to an MNS and GGD type electric low-voltage drawer cabinet. Background Art

[0002] Low-voltage drawer cabinets are indispensable components in the power system and are widely used in power plants, substations, industrial and mining enterprises, high-rise buildings, airports, ports, and radio and television facilities. The core component is an electrical device integrated with a series of protection devices such as switch circuit breakers, and the drawer-type design facilitates management. These drawer-type low-voltage cabinets play a key role in power control, protection, conversion, and distribution in the low-voltage power supply system.

[0003] The remarkable characteristics of such products include excellent breaking capacity, outstanding dynamic and thermal stability, flexible electrical configuration schemes, convenient combination methods, and advantages such as serialization, practicality, and novel structure. The cabinet body of the low-voltage power distribution cabinet is designed with multiple drawers, allowing distribution components to be conveniently installed inside the drawers. Once a component fails, the corresponding drawer can be easily taken out for maintenance, and the operation process is simple and intuitive.

[0004] However, there are also some limitations in the current design of the drawers of low-voltage power distribution cabinets. Due to the dense installation of various distribution components inside, the weight of the drawers is relatively large. This makes it difficult for operators to easily push and pull the drawers because of the resistance of the drawer's own weight. Especially when pushing in the drawer, due to the height difference of the working position and the weight of the drawer, it is difficult to ensure the smooth and uniform movement of the drawer. In addition, when the primary contact bayonet joint in the drawer contacts the power-taking copper bar, an impact force needs to be applied to achieve clamping, which may cause the distribution components in the drawer to shake, thereby affecting the connection stability of the electronic components. More seriously, the plastic parts of the function board at the rear of the drawer are prone to cracking after being impacted, which may lead to faults in the power distribution equipment. Content of the Utility Model

[0005] In view of the existing technical deficiencies, the utility model provides an electric low-voltage drawer cabinet.

[0006] In order to achieve the above object, the technical solution adopted by the utility model is: an electric low-voltage drawer cabinet, comprising:

[0007] A cabinet body;

[0008] A drawer that forms a limited reciprocating motion inside the cabinet;

[0009] A driving device installed inside the cabinet and corresponding to the back position of the drawer;

[0010] A screw rod driven by the driving device, the screw rod is provided with an external thread, one end of the screw rod is inserted into the drawer interior, and the other end is installed inside the cabinet;

[0011] A driven part installed inside the drawer and cooperating with the screw. The driven part is provided with a first through hole penetrating through its interior, and the inner wall of the first through hole is provided with internal threads;

[0012] A detection device for detecting the position of the drawer. The detection device includes a detection rod installed on the back of the drawer. One end of the detection rod is provided with a metal block, and also includes a plurality of proximity switches installed inside the cabinet and corresponding to the position of the back of the drawer;

[0013] A control module for receiving the electrical signal transmitted by the detection device, processing the information and then transmitting it to the driving device. The control module is electrically connected to the proximity switch, and the control module is electrically connected to the driving device;

[0014] A mode selection device electrically connected to the control module.

[0015] Furthermore, a plurality of movable plugs are provided on the back of the drawer. Correspondingly, a plurality of static plugs matching them are provided on the cabinet body corresponding to the position of the back of the drawer.

[0016] Furthermore, the driving device includes a motor. A rotating shaft is provided on the motor. One end of the rotating shaft is provided with a motor gear, and also includes a transmission member for connecting the motor gear and the screw.

[0017] Furthermore, the transmission member is a plurality of transmission gears.

[0018] Furthermore, the screw is provided with a serrated portion for cooperating with the transmission member.

[0019] Furthermore, the serrated portion is a first gear with external teeth. A plurality of protrusions are provided inside the first gear, and the screw is provided with a plurality of grooves for cooperating with the protrusions

[0020] Furthermore, a housing for limiting and abutting against the first gear is provided on the side of the first gear away from the drawer. A limiting ring abutting against the first gear is provided on the side of the first gear close to the drawer. The limiting ring is fixedly connected to the screw, and one end of the limiting ring close to the drawer abuts against the cabinet body corresponding to the position of the back of the drawer.

[0021] Furthermore, a second through hole for the detection rod to pass through is provided inside the cabinet body corresponding to the position of the back of the drawer. A cantilever for installing a plurality of proximity switches is provided above the second through hole, and a track for the proximity switches to slide is provided inside the cantilever.

[0022] Furthermore, the control module includes a PLC programmable logic controller.

[0023] Furthermore, the mode selection device includes a multi-way selector switch.

[0024] Advantages of the present utility model: Since the present utility model uses an electric method to push and pull the drawer, it is not affected by the weight of the drawer, and the operation is labor-saving and simple; moreover, since it is driven by a motor, it can ensure that the drawer runs smoothly and uniformly during the process of pushing and pulling the drawer; since an inductive proximity switch is used, it ensures that the drawer can stop at the accurate position, avoiding damage to the instrument caused by incorrect position when the drawer is manually pushed.

[0025] The present utility model also has the characteristics of simple structure, convenient processing and easy assembly, and strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural view of the present utility model;

[0027] Figure 2 is a schematic structural view of the present utility model in the working mode;

[0028] Figure 3 is a schematic structural view of the present utility model in the test mode;

[0029] Figure 4 is a schematic structural view of the present utility model in the maintenance mode;

[0030] Figure 5 is a rear view of the present utility model;

[0031] Figure 6 is along Figure 5 the sectional view taken along line A-A in

[0032] Figure 7 is Figure 6 the partial enlarged view of B in

[0033] Figure 8 is a schematic structural view of the screw of the present utility model;

[0034] Figure 9 is a schematic structural view of the driven part of the present utility model;

[0035] Figure 10 is a schematic structural view of the first gear of the present utility model;

[0036] Figure 11 is a schematic structural view of the limit ring of the present utility model;

[0037] Figure 12 is the operation flow chart of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] As Figures 1 - 11 shown, an electric low-voltage drawer cabinet includes:

[0039] cabinet body 1;

[0040] A drawer 2 that forms a limited reciprocating motion is formed within the cabinet body 1;

[0041] A driving device 3 installed within the cabinet body 1 and corresponding to the back position of the drawer 2;

[0042] A screw rod 4 driven by the driving device 3, an external thread is provided on the screw rod 4, one end of the screw rod 4 is inserted into the interior of the drawer 2, and the other end thereof is installed within the cabinet body 1;

[0043] A driven part 5 installed within the drawer 2 and cooperating with the screw rod 4, a first through hole 51 penetrating through its interior is provided on the driven part 5, and an internal thread is provided on the inner wall of the first through hole 51;

[0044] A detection device 6 for detecting the position where the drawer 2 is located, the detection device 6 includes a detection rod 61 installed on the back of the drawer 2, a metal block 62 is provided at one end of the detection rod 61, and further includes a plurality of proximity switches 63 installed within the cabinet body 1 and corresponding to the back position of the drawer 2;

[0045] A control module for receiving the electrical signal transmitted by the detection device 6 and transmitting the information to the driving device 3 after processing, the control module is electrically connected to the proximity switch 63, and the control module is electrically connected to the driving device 3;

[0046] A mode selection device electrically connected to the control module.

[0047] In the above structure, the proximity switch 63 in this embodiment adopts an inductive proximity switch 63. The inductive proximity switch 63 is a low-cost method for non-contact detection of metal objects. When a metal object moves towards or away from the proximity switch 63, the signal will automatically change, thereby achieving the purpose of detection.

[0048] Therefore, by installing the metal block 62 on the detection rod 61 provided on the back of the drawer 2, since the movement of the drawer 2 drives the metal block 62 to move, when the plurality of proximity switches 63 at different positions detect the metal block 62, it means that the drawer 2 has also reached the corresponding position.

[0049] In this embodiment, a plurality of moving plugs 7 are provided on the back of the drawer 2. Correspondingly, a plurality of static plugs 8 matching them are provided on the cabinet body 1 corresponding to the back position of the drawer 2.

[0050] In this embodiment, the driving device 3 includes a motor 31, a rotating shaft is provided on the motor 31, a motor gear is provided at one end of the rotating shaft, and further includes a transmission member for connecting the motor gear and the screw rod 4.

[0051] In this embodiment, the transmission member is a plurality of transmission gears.

[0052] In the above structure, the transmission member can also adopt a toothed belt.

[0053] In this embodiment, a serrated portion for cooperating with a transmission member is provided on the screw rod 4.

[0054] In this embodiment, the serrated portion is a first gear 41 with external teeth. A plurality of protrusions 42 are provided inside the first gear 41, and a plurality of grooves 43 for cooperating with the protrusions 42 are provided on the screw rod 4.

[0055] In this embodiment, a housing 9 for limiting and abutting against the first gear 41 is provided on the side of the first gear 41 away from the drawer 2. A limiting ring 10 for abutting against the first gear 41 is provided on the side of the first gear 41 close to the drawer 2. The limiting ring 10 is fixedly connected to the screw rod 4, and one end of the limiting ring 10 close to the drawer 2 abuts against the cabinet body 1 at the position corresponding to the back of the drawer 2.

[0056] In the above structure, the first gear 41 is limited by the housing 9 and the limiting ring 10, and thus the screw rod 4 cooperating with the first gear 41 is restricted.

[0057] In this embodiment, a second through hole 11 for allowing a detection rod 61 to pass through is provided in the cabinet body 1 at the position corresponding to the back of the drawer 2. A cantilever 12 for installing a plurality of proximity switches 63 is provided above the second through hole 11. A track 13 for allowing the proximity switches 63 to slide is provided in the cantilever 12.

[0058] In this embodiment, the control module includes a PLC programmable logic controller.

[0059] In this embodiment, the mode selection device includes a multiplexer switch.

[0060] Three proximity switches are installed on the cantilever 12, and the three proximity switches 63 are respectively installed at three different positions on the cantilever 12. The three positions are named as a working position 14, a test position 15, and a maintenance position 16 in sequence from the inside to the outside in the direction close to the drawer 2.

[0061] There are three modes available for selection in the mode selection device, namely a working mode, a test mode, and a maintenance mode.

[0062] As Figure 12 shown, the operation process of the present utility model is as follows:

[0063] When the working mode is selected in the mode selection device, a signal is transmitted to the control module at this time. The control module activates the proximity switch 63 to detect the current position and feeds back the information to the control module, and the control module makes a judgment:

[0064] If the current position is not the working position 14 and is at the maintenance position 16, the control module reversely connects the power supply, and the driving device 3 runs reversely. The motor 31 of the driving device 3 rotates reversely to drive the screw 4 to rotate, thereby pushing the drawer 2 to move. At this time, the detection rod 61 on the drawer 2 moves together with the drawer 2. When the metal block 62 of the detection rod 61 is detected by the proximity switch 63 at the test position 15, the information is continuously fed back to the control module, and the control module makes a judgment that the current position is not the working position 14 but at the maintenance position 16. The control module reversely connects the power supply, and the driving device 3 runs reversely. The motor 31 of the driving device 3 rotates reversely to drive the screw 4 to rotate, thereby pushing the drawer 2 to move. At this time, the detection rod 61 on the drawer 2 moves together with the drawer 2. When the metal block 62 of the detection rod 61 is detected by the proximity switch 63 at the working position 14, the information is continuously fed back to the control module, and the control module makes a judgment. After the control module makes a judgment and finds that the current position is the working position 14, the power supply is cut off, and the driving device 3 stops. At this time, the moving plug-in 7 is inserted into the static plug-in 8;

[0065] If the current position is not the working position 14 and is at the test position 15, the control module reversely connects the power supply, and the driving device 3 runs reversely. The motor 31 of the driving device 3 rotates reversely to drive the screw 4 to rotate, thereby pushing the drawer 2 to move. At this time, the detection rod 61 on the drawer 2 moves together with the drawer 2. When the metal block 62 of the detection rod 61 is detected by the proximity switch 63 at the working position 14, the information is continuously fed back to the control module, and the control module makes a judgment. After the control module makes a judgment and finds that the current position is the working position 14, the power supply is cut off, and the driving device 3 stops. At this time, the moving plug-in 7 is inserted into the static plug-in 8.

[0066] When the test mode is selected in the mode selection device, the signal is transmitted to the control module at this time. The control module mobilizes the proximity switch 63 to detect the current position and feeds the information back to the control module, and the control module makes a judgment:

[0067] If the current position is not the test position 15 and is at the working position 14, the control module positively connects the power supply, and the driving device 3 runs forward. The motor 31 of the driving device 3 rotates forward to drive the screw 4 to rotate, thereby pulling the drawer 2 to move. At this time, the detection rod 61 on the drawer 2 moves together with the drawer 2. When the metal block 62 of the detection rod 61 is detected by the proximity switch 63 at the test position 15, the information is continuously fed back to the control module, and the control module makes a judgment. After finding that the current position is the test position 15, the power supply is cut off, and the driving device 3 stops. At this time, the moving plug-in 7 is pulled out from the static plug-in 8;

[0068] If the current position is not the test position 15 and is at the maintenance position 16, the control module reversely connects the power supply, the driving device 3 runs reversely, the motor 31 of the driving device 3 rotates reversely to drive the screw 4 to rotate, thereby pushing the drawer 2 to move. At this time, the detection rod 61 on the drawer 2 moves together with the drawer 2. When the metal block 62 of the detection rod 61 is detected by the proximity switch 63 at the test position 15, the information is continuously fed back to the control module. The control module makes a judgment and finds that the current position is the test position 15, then cuts off the power supply and the driving device 3 stops. At this time, the moving plug-in 7 is pulled out from the static plug-in 8.

[0069] When the maintenance mode is selected in the mode selection device, the signal is transmitted to the control module at this time. The control module mobilizes the proximity switch 63 to detect the current position and feeds the information back to the control module. The control module makes a judgment:

[0070] If the current position is not the maintenance position 16 and is at the working position 14, the control module positively connects the power supply, the driving device 3 runs forward, the motor 31 of the driving device 3 rotates forward to drive the screw 4 to rotate, thereby pulling the drawer 2 to move. At this time, the detection rod 61 on the drawer 2 moves together with the drawer 2. When the metal block 62 of the detection rod 61 is detected by the proximity switch 63 at the test position 15, the information is continuously fed back to the control module. The control module makes a judgment that the current position is not the maintenance position 16 but the test position 15. The control module positively connects the power supply, the driving device 3 runs forward, the motor 31 of the driving device 3 rotates forward to drive the screw 4 to rotate, thereby pulling the drawer 2 to move. At this time, the detection rod 61 on the drawer 2 moves together with the drawer 2. When the metal block 62 of the detection rod 61 is detected by the proximity switch 63 at the maintenance position 16, the information is continuously fed back to the control module. After the control module makes a judgment and finds that the current position is the maintenance position 16, it cuts off the power supply and the driving device 3 stops;

[0071] If the current position is not the maintenance position 16 and is at the test position 15, the control module positively connects the power supply, the driving device 3 runs forward, the motor 31 of the driving device 3 rotates forward to drive the screw 4 to rotate, thereby pulling the drawer 2 to move. At this time, the detection rod 61 on the drawer 2 moves together with the drawer 2. When the metal block 62 of the detection rod 61 is detected by the proximity switch 63 at the maintenance position 16, the information is continuously fed back to the control module. After the control module makes a judgment and finds that the current position is the maintenance position 16, it cuts off the power supply and the driving device 3 stops.

[0072] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, simple modifications and substitutions made by ordinary technicians in the field are within the protection scope of the present utility model.

Claims

1. An electric low-voltage drawer cabinet, characterized in that: include: Cabinet; A drawer that forms limited reciprocating motion in the cabinet; a driving device installed in the cabinet and corresponding to the back position of the drawer; a screw driven by the driving device, the screw having an external thread, one end of the screw inserted into the drawer, and the other end installed in the cabinet; a driven part installed in the drawer in cooperation with the screw, the driven part having a first through hole penetrating the interior thereof, and an internal thread provided on the inner wall of the first through hole; a detection device for detecting the position of the drawer, the detection device comprising a detection rod installed at the back of the drawer, one end of the detection rod being provided with a metal block, and also comprising a plurality of proximity switches installed in the cabinet and corresponding to the back position of the drawer; a control module for receiving an electrical signal from the detection device and transmitting the processed information to the driving device, the control module being electrically connected to the proximity switch, and the control module being electrically connected to the driving device; A mode selection device is electrically connected to the control module.

2. An electric low-voltage drawer cabinet as claimed in claim 1, characterized in that: The drawer back is provided with a plurality of movable plug-ins, and correspondingly, the cabinet body is provided with a plurality of matching static plug-ins at positions corresponding to the drawer back.

3. An electric low-voltage drawer cabinet as claimed in claim 1 or 2, characterized in that: The driving device comprises a motor, a rotating shaft is arranged on the motor, a motor gear is arranged at one end of the rotating shaft, and a transmission member for connecting the motor gear and the screw rod.

4. An electric low-voltage drawer cabinet as claimed in claim 3, characterized in that: The transmission parts are a plurality of transmission gears.

5. An electric low-voltage drawer cabinet as claimed in claim 4, characterized in that: The screw rod is provided with a sawtooth portion which cooperates with the transmission member.

6. An electric low-voltage drawer cabinet as claimed in claim 5, characterized in that: The sawtooth portion is a first gear with external teeth, a plurality of protrusions are arranged inside the first gear, and the screw rod is provided with a plurality of grooves matched with the protrusions.

7. An electric low-voltage drawer cabinet as claimed in claim 6, characterized in that: A shell for limiting and abutting against the first gear is provided on the side away from the drawer, and a limiting ring abutting against the first gear is provided on the side close to the drawer. The limiting ring is fixedly connected to the screw, and one end of the limiting ring close to the drawer abuts against the cabinet corresponding to the back position of the drawer.

8. An electric low-voltage drawer cabinet as claimed in claim 1 or 2, characterized in that: A second through hole for the detection rod to pass through is provided in the cabinet body corresponding to the back position of the drawer, a cantilever beam for installing a plurality of proximity switches is provided above the second through hole, and a track for the proximity switches to slide is provided in the cantilever beam.

9. An electric low-voltage drawer cabinet as claimed in claim 1 or 2, characterized in that: The control module includes a plc programmable logic controller.

10. An electric low-voltage drawer cabinet as claimed in claim 1 or 2, characterized in that: The mode selection device includes a multi-way selection switch.

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