CN210838587U - Low-voltage protection box of hinge connection mechanism - Google Patents
Low-voltage protection box of hinge connection mechanism Download PDFInfo
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- CN210838587U CN210838587U CN201922075657.5U CN201922075657U CN210838587U CN 210838587 U CN210838587 U CN 210838587U CN 201922075657 U CN201922075657 U CN 201922075657U CN 210838587 U CN210838587 U CN 210838587U
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Abstract
The utility model discloses a hinged joint mechanism's low pressure guard box, including box, chamber door, apron, the box is the cuboid, the box is equipped with the hinge mechanism with the chamber door, the box is provided with intermediate bottom, intermediate bottom separates whole box into wiring chamber, explosion-proof chamber is provided with signal sampling unit, signal sampling unit includes voltage transformer, current transformer, and intelligent integrated protection ware is installed to the inboard of chamber door panel, is equipped with the liquid crystal display who is used for showing protection box running state and various fault status on the chamber door panel to be equipped with and be used for realizing transshipping, short circuit, electric leakage, reset, electricity branch function operating button and parameter setting button. The beneficial effects of the utility model reside in that: through setting up intelligent comprehensive protection ware and to the data analysis processing of signal sampling unit, can discover the trouble in time and can in time break circuit, greatly ensured circuit safety.
Description
Technical Field
The utility model relates to a coal mine equipment technical field especially relates to a hinged joint mechanism's low pressure guard box.
Background
The traditional mining low-voltage protection box has the disadvantages of low switch on-off performance, more faults, large maintenance amount and short service life; the universality of 3300V and 1140(660V) voltages is lacked, namely the universality of the butt joint of a flange interface of a mining explosion-proof mobile substation and a low-voltage side protection box, the universality of a direct connection mode of a load side and the universality of a connection mode of a quick cable connector; the PLC protection is needed to be adopted for short circuit, electric leakage and other safety protection functions; when the load switch cuts off the power supply under normal conditions, an insulating partition plate needs to be additionally arranged on the load switch to ensure that the gap of the electrical appliance strengthens the insulating strength; the low-voltage load switch is opened, the emergency shutdown needs to be provided with the upper-level high-explosion switch opening, the load switch cannot be directly operated with a load, and a voltage transformer (transformer) is often burnt in use; these problems involve increasing the cost of occupation and maintenance of the underworkings and the use of equipment, inconvenience in work and many unsafe factors of complexity.
SUMMERY OF THE UTILITY MODEL
The utility model provides a hinged joint mechanism's low pressure guard box solves the problem that low pressure guard box performance is low, the trouble is many, the maintenance volume is big, life is short.
The technical scheme of the utility model is that: a low-voltage protection box of a hinge connection mechanism comprises a box body, a box door and a cover plate, wherein the box body is a cuboid, hinge mechanisms are arranged on the box body and the box door, the box body is in hinge connection with the box door, the box door is provided with a buckle ring, the buckle ring is in buckle connection with the buckle cap, the box body is provided with an intermediate partition plate, the intermediate partition plate separates the whole box body into a wiring cavity and an explosion-proof cavity, the left side and the right side of the wiring cavity are respectively provided with two cable leading-in devices, the explosion-proof cavity is provided with a signal sampling unit, the signal sampling unit comprises a voltage transformer and a current transformer, a locking and opening-closing switch brake device is arranged on the right side plate of the box body, a low-voltage protection device is arranged inside the box door, an intelligent comprehensive protector is arranged on the inner side of the box door, and a, the intelligent comprehensive protector is provided with an operating button and a parameter setting button for realizing functions of overload, short circuit, electric leakage, reset and electric separation, wherein a high-voltage cable is connected from a high-voltage side cable leading-in device and is led out from a low-voltage side cable leading-in device through a high-voltage vacuum switch, a voltage transformer and a current transformer;
and the voltage transformer connected with the high-voltage vacuum switch provides power to be input to the low-voltage side through a four-core wiring terminal of the transformer, and the power is used as a working power supply of the intelligent low-voltage protector.
The intelligent comprehensive protector monitors and displays the states of a main loop, a control loop, voltage, current, insulation and the like of the protection box in real time, outputs and displays faults according to the logic relation set by various programs, simultaneously transmits a protection signal to a protection module of a high-voltage vacuum switch, drives a vacuum circuit breaker to trip, and implements overload protection, short-circuit protection, leakage locking, overvoltage protection and undervoltage protection on a system.
In the structure, the locking switch opening and closing device comprises an interlocking screw rod, a box door and an opening and closing valve, the interlocking screw rod is connected with the opening and closing valve, the interlocking screw rod is connected with a bolt of the box door, and the locking switch opening and closing device is arranged as follows: the high-voltage vacuum switch prevents the door of the low-voltage protection box from being opened when in the switching-on position; and the box door of the low-voltage protection box prevents the high-voltage vacuum switch from being switched on when the box door is opened.
In the above structure, the low voltage protection device includes high voltage side circuit breaker, protective relay, high voltage switch, vacuum circuit breaker, the low voltage protection device sets up to: when the handle of the low-voltage protection box rotates to the 'off' position, the high-voltage side circuit breaker is controlled to trip through the signal line and is locked through the protection relay, so that the non-voltage release coil of the vacuum circuit breaker cannot be attracted, and the high-voltage switch is guaranteed to be switched on only when the low-voltage protection box is in a normal operation state.
In the structure, the overload protection is that the intelligent integrated protector carries out delayed power-off according to corresponding time when reaching a protection value according to a signal sent by the current transformer after processing and comparing with a set protection value, and simultaneously, the liquid crystal display screen displays an overload fault; the short-circuit protection is that the intelligent comprehensive protector compares a signal sent by the current transformer with a set short-circuit current protection value after processing and calculation, and immediately protects power failure when the short-circuit current value is greater than the short-circuit current value, and simultaneously, the liquid crystal display screen displays a short-circuit fault; the overvoltage protection and the undervoltage protection are that the intelligent comprehensive protector samples AC12V voltage output by the secondary side of the voltage transformer and transmits the voltage signal to the intelligent comprehensive protector, the voltage signal is compared with the set voltage after signal processing, when the sampled voltage is lower than 75% of the rated voltage or higher than 115% of the rated voltage, the intelligent comprehensive protector outputs a signal after the set time delay to control the disconnection of the high-voltage vacuum circuit breaker, and meanwhile, the liquid crystal display screen displays 'overvoltage fault' or 'undervoltage fault'. When the leakage signal is greater than the internal leakage protection or leakage locking regulation, the intelligent comprehensive protector performs protection action and outputs a signal to a high-voltage side, and meanwhile, the liquid crystal display screen displays leakage protection or leakage locking.
In the structure, the intelligent comprehensive protector comprises a DSP chip for acquiring signals and processing interruption, a high-voltage vacuum circuit breaker for interrupting electric leakage and short-circuit protection, and an RS485 chip with a communication function, wherein the DSP chip is in circuit connection with the high-voltage vacuum circuit breaker and the RS485 chip.
The beneficial effects of the utility model reside in that: through setting up intelligent integrated protection ware and to the data analysis processing of signal sampling unit, can in time discover the trouble and can in time break circuit, greatly ensured circuit safety, specifically have following several:
1. the explosion suppression device has the advantages that the explosion suppression device meets the GB requirement, the size is small, the appearance structure is more reasonable, the operation is visual and convenient, the device is provided with an advanced and perfect microcomputer integrated system, the reliability of the whole power supply is improved, the protection parameters are integrally convenient, the device has the functions of simulating fault test self-checking and time and date display, the device can be directly operated with a load, and the distance and distance control is realized.
2. In the coal mine, a voltage transformer (transformer) is often burnt out, the whole machine is burnt out when the coal mine is used seriously, the maintenance cost is increased, the good image of an enterprise is influenced, a high-voltage vacuum circuit breaker is additionally arranged, and a switch is protected by protecting the voltage transformer.
3. A special protection function module shift change control terminal digital signal processing center, namely an intelligent comprehensive protector, is integrated in software module application, the function module can realize constant-speed disconnection protection of electric leakage and short circuit, the protection is realized in an interruption mode, and the protection is simpler and more convenient than other products in programming and has quicker response.
4. The software module can directly collect alternating voltage and current signals output by the current transformer and the transformer, other products PLC can only receive standard direct current signals, a sampling plate and the like for converting the alternating current signals into the standard direct current signals and transmitting equipment are omitted, the signal sampling speed is improved, a possible fault point is reduced, the cost is saved, and the installation space is reduced.
5. The intelligent comprehensive protector adopts an advanced DSP chip for collecting signals and processing interruption, the electric leakage and short-circuit protection adopt hardware interruption, no program scanning is needed for logic judgment, and compared with other products, the intelligent comprehensive protector saves a transmitter, greatly shortens the time of short-circuit protection and electric leakage protection, and improves the safety of underground personnel and equipment of a coal mine.
6. The intelligent comprehensive protector adopts advanced PLC to protect the voltage and current insulation state in the main loop to carry out real-time monitoring and display; the control button is directly received on the DI point that adopts advanced PLC, realizes text picture's switching and parameter setting through PLC's DI point, and the product can more freely set up the button trompil position on the explosion-proof switch casing door, and it is more convenient to expand than other products can not freely set up button trompil position.
7. The intelligent comprehensive protector directly has a sensor to provide original data, and has the advantages of high accuracy, strong response failure, outstanding anti-interference capability and enhanced equipment protection reliability.
8. The intelligent comprehensive protector and the color display LCD screen with advanced technology are adopted, the parameter setting is flexible and simple, the quality is stable, the action performance is sensitive and reliable, and the operation and fault pictures are visual and concise.
9. The intelligent comprehensive protector has the functions of system self-checking, fault diagnosis, routing inspection and memory, and RS485 communication, and can transmit the running fault state in real time to be combined with an automatic network of a mine to form a more complete automatic mine monitoring system.
10. All faults drive the high-voltage side vacuum circuit breaker to break the high-voltage side power supply through the signal wire, so that the breaking current is reduced, the frequent segmentation problem of the voltage feed switch is solved, meanwhile, the dead zone problem that the fault point cannot be broken due to the leakage of the loop from the low-voltage winding of the transformer to the low-voltage feed switch is solved, and the major accident that the winding of the transformer is burnt out due to faults is avoided.
11. The protection is complete in high performance, has the protection functions of overload, short circuit, leakage protection, leakage locking, overvoltage, undervoltage and the like, and forms an international advanced protection mode of a high-voltage side power supply of the low-voltage side fault sectional transformer by matching with the transformer.
12. The adopted hinge pin shaft thread fastening connection mechanism can further ensure the explosion-proof safety between the contact surface of the box body door and the box body.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a front view of a low pressure protective case;
FIG. 2 is a cross-sectional view of the low pressure protection tank;
fig. 3 is a side view of the low pressure protection tank.
In the figure: the system comprises a low-voltage side cable leading-in device 1, a name plate 2, a high-voltage side cable leading-in device 3, a liquid crystal display screen 4, a parameter setting button 5, a function operating button 6, a hinge mechanism 7, an explosion-proof cavity 8, an interlocking screw rod 9, a switching-on/off handle 10, a switching-on/off switch 11, a dustproof plate 12, a wiring cavity 13, a current transformer 14, a signal sampling unit 15, a retaining ring 16 and a retaining cap 17.
Detailed Description
The invention is further described with reference to the following figures and examples.
Referring to the attached drawings, the low-voltage protection box of the hinge connection mechanism disclosed by the utility model comprises a box body, a box door and a cover plate, wherein the box body is a cuboid, the box body and the box door are provided with hinge mechanisms, the box body is connected with the box door through hinges, the box door is provided with a buckle ring 16, the box body is provided with a buckle cap 17, the buckle ring 16 is buckled and connected with the buckle cap 17, each hinge mechanism comprises a door plate groove plate, a hinge seat, a hinge shaft, a pin, a hinge tee joint and a door moving shaft handle, a dustproof plate 12 is arranged on the box door, the box body is provided with an intermediate partition plate, the intermediate partition plate partitions the whole box body into a wiring cavity 13 and an explosion-proof cavity 8, the left side and the right side of the wiring cavity 13 are respectively provided with two cable leading-in devices, the explosion-proof cavity 8 is provided with a signal sampling unit 15, the signal sampling unit, the intelligent integrated protector is characterized in that a low-voltage protection device is arranged in the box door, an intelligent integrated protector is arranged on the inner side of a box door panel, a liquid crystal display screen 4 used for displaying the running state and various fault states of the protection box is arranged on the box door panel, an operation button 6 and a parameter setting button 5 used for realizing overload, short circuit, electric leakage, reset and electric separation are arranged on the box door panel, a high-voltage cable is connected to a high-voltage side cable leading-in device 3 and is led out from a low-voltage side cable leading-in device 1 through a high-voltage vacuum switch, a voltage transformer and a current transformer 14, and the intelligent integrated protector is in circuit connection with the liquid crystal display;
the voltage transformer connected with the high-voltage vacuum switch provides power to be input to the low-voltage side through a four-core wiring terminal of the transformer, and the power is used as a working power supply of the intelligent low-voltage protector;
the intelligent comprehensive protector monitors and displays the states of a main loop, a control loop, voltage, current, insulation and the like of the protection box in real time, outputs and displays faults according to the logic relation set by various programs, simultaneously transmits a protection signal to a protection module of a high-voltage vacuum switch, drives a vacuum circuit breaker to trip, and implements overload protection, short-circuit protection, leakage locking, overvoltage protection and undervoltage protection on a system.
Preferably, the locking switch opening and closing device comprises an interlocking screw 9, a box door and an opening and closing switch 11, wherein the interlocking screw 9 is connected with the opening and closing switch 11, the interlocking screw 9 is connected with a bolt of the box door, and the locking switch opening and closing device is set as follows: the high-voltage vacuum switch prevents the door of the low-voltage protection box from being opened when in the switching-on position; and the box door of the low-voltage protection box prevents the high-voltage vacuum switch from being switched on when the box door is opened.
Preferably, the low-voltage protection device comprises a high-voltage side circuit breaker, a protection relay, a high-voltage switch and a vacuum circuit breaker, and the low-voltage protection device is set as follows: when the low-voltage protection box switching-on/off handle 10 rotates to the 'off' position, the high-voltage side circuit breaker is controlled to trip through a signal line and is locked through the protection relay, so that the non-voltage release coil of the vacuum circuit breaker cannot be attracted, and the high-voltage switch is guaranteed to be switched on only when the low-voltage protection box is in a normal operation state. The front of the box body is provided with a nameplate 2.
Preferably, the overload protection is that the intelligent integrated protector carries out delayed power-off according to corresponding time when reaching a protection value according to a signal sent by a current transformer after processing and comparing with a set protection value, and simultaneously, a liquid crystal display screen displays an overload fault; the short-circuit protection is that the intelligent comprehensive protector compares a signal sent by the current transformer with a set short-circuit current protection value after processing and calculation, and immediately protects power failure when the short-circuit current value is larger than the short-circuit current value, and simultaneously, the liquid crystal display screen 4 displays a short-circuit fault; the overvoltage protection and the undervoltage protection are that the intelligent comprehensive protector samples AC12V voltage output by the secondary side of the voltage transformer and transmits the voltage signal to the intelligent comprehensive protector, the voltage signal is compared with the set voltage after signal processing, when the sampled voltage is lower than 75% of the rated voltage or higher than 115% of the rated voltage, the intelligent comprehensive protector outputs a signal after the set time delay to control the disconnection of the high-voltage vacuum circuit breaker, and meanwhile, the liquid crystal display 4 displays 'overvoltage fault' or 'undervoltage fault'. When the leakage signal is greater than the internal leakage protection or leakage locking regulation, the intelligent comprehensive protector performs protection action and outputs a signal to a high-voltage side, and meanwhile, the liquid crystal display screen 4 displays leakage protection or leakage locking.
Preferably, the intelligent comprehensive protector comprises a DSP chip for acquiring signals and processing interruption, a high-voltage vacuum circuit breaker for interrupting electric leakage and short-circuit protection and an RS485 chip with a communication function, wherein the DSP chip is in circuit connection with the high-voltage vacuum circuit breaker and the RS485 chip, and the voltage and current insulation state in a main circuit is protected by adopting an advanced PLC for real-time monitoring and display; the control button is directly received on the DI point that adopts advanced PLC, realizes text picture's switching and parameter setting through PLC's DI point, and the product can more freely set up the button trompil position on the explosion-proof switch casing door, and it is more convenient to expand than other products can not freely set up button trompil position.
The utility model discloses do vacuum flame proof structural design in the place that needs the vacuum: the rough illumination of the processing surface of the explosion-proof joint surface of each explosion-proof flange and each part reaches 6.3 or 3.2 values, the size gaps of the explosion-proof joint surface are smaller than 0.35mm, an explosion-proof vacuum cavity is formed, and the explosion-proof performance of the explosion-proof joint surface meets the national standard GB 8286-2010.
In one embodiment, the interlocking screw is connected with a bolt of the box door, the interlocking screw 9 can be directly used as the bolt, and the low-pressure protection box can be provided with one less part.
The above description is only a preferred embodiment of the present patent, and not intended to limit the scope of the present patent, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the specification and the drawings, and which are directly or indirectly applied to other related technical fields, belong to the scope of the present patent protection.
Claims (4)
1. A low-voltage protection box of a hinge connection mechanism is characterized in that: the box body is a cuboid, the box body and the box door are provided with hinge mechanisms, the box body is hinged with the box door, the box door is provided with a buckle ring, the box body is provided with a buckle cap, the buckle ring is buckled with the buckle cap, the box body is provided with an intermediate partition plate, the intermediate partition plate separates the whole box body into a wiring cavity and an explosion-proof cavity, the left side and the right side of the wiring cavity are respectively provided with two cable leading-in devices, the explosion-proof cavity is provided with a signal sampling unit, the signal sampling unit comprises a voltage transformer and a current transformer, a locking switch opening and closing device is arranged on the right side plate of the box body, a low-voltage protection device is arranged inside the box door, the inner side of the box door is provided with an intelligent comprehensive protector, and the box door is provided with a liquid crystal display screen for, the intelligent comprehensive protector is provided with an operating button and a parameter setting button for realizing functions of overload, short circuit, electric leakage, reset and electric separation, a high-voltage cable is connected from a high-voltage side cable leading-in device and is led out from a low-voltage side cable leading-in device through a high-voltage vacuum switch, a voltage transformer and a current transformer, and the intelligent comprehensive protector is connected with a liquid crystal display screen and a signal sampling unit circuit;
and a voltage transformer connected with the high-voltage vacuum switch provides power to be input to a low-voltage side through a four-core wiring terminal of the transformer, and the power is used as a working power supply of the low-voltage protection device.
2. The low pressure protective case of a hinge connection mechanism as claimed in claim 1, wherein: the locking switch opening and closing device comprises an interlocking screw rod, a box door and an opening and closing valve, the interlocking screw rod is connected with the opening and closing valve, and the interlocking screw rod is connected with a bolt of the box door.
3. The low pressure protective case of a hinge connection mechanism as claimed in claim 1, wherein: the low-voltage protection device comprises a high-voltage side circuit breaker, a protection relay, a high-voltage switch and a vacuum circuit breaker.
4. The low pressure protective case of a hinge connection mechanism as claimed in claim 1, wherein: the intelligent comprehensive protector comprises a DSP chip for acquiring signals and processing interruption, a high-voltage vacuum circuit breaker for interrupting electric leakage and short-circuit protection, and an RS485 chip with a communication function, wherein the DSP chip is in circuit connection with the high-voltage vacuum circuit breaker and the RS485 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922075657.5U CN210838587U (en) | 2019-11-27 | 2019-11-27 | Low-voltage protection box of hinge connection mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922075657.5U CN210838587U (en) | 2019-11-27 | 2019-11-27 | Low-voltage protection box of hinge connection mechanism |
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| Publication Number | Publication Date |
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| CN210838587U true CN210838587U (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922075657.5U Active CN210838587U (en) | 2019-11-27 | 2019-11-27 | Low-voltage protection box of hinge connection mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751312A (en) * | 2021-01-06 | 2021-05-04 | 北京博瑞莱智能科技集团有限公司 | Novel box transformer substation and power distribution protection system thereof |
-
2019
- 2019-11-27 CN CN201922075657.5U patent/CN210838587U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751312A (en) * | 2021-01-06 | 2021-05-04 | 北京博瑞莱智能科技集团有限公司 | Novel box transformer substation and power distribution protection system thereof |
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