CN111130312A - Switching power supply device and control method thereof - Google Patents

Switching power supply device and control method thereof Download PDF

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Publication number
CN111130312A
CN111130312A CN202010047573.5A CN202010047573A CN111130312A CN 111130312 A CN111130312 A CN 111130312A CN 202010047573 A CN202010047573 A CN 202010047573A CN 111130312 A CN111130312 A CN 111130312A
Authority
CN
China
Prior art keywords
motor
switch cabinet
power supply
switching power
transmission
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010047573.5A
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Chinese (zh)
Inventor
陈在喜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Chengye Electronic Technology Co Ltd
Original Assignee
Anhui Chengye Electronic Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anhui Chengye Electronic Technology Co Ltd filed Critical Anhui Chengye Electronic Technology Co Ltd
Priority to CN202010047573.5A priority Critical patent/CN111130312A/en
Publication of CN111130312A publication Critical patent/CN111130312A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/20Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20909Forced ventilation, e.g. on heat dissipaters coupled to components

Abstract

The invention discloses a switching power supply device, which comprises a switch cabinet, wherein the top and the bottom of the switch cabinet are respectively and rotatably provided with a first transmission screw rod positioned at the front end of a threaded column, two first transmission screw rods are arranged in parallel, the right ends of the two first transmission screw rods are respectively provided with a transmission belt wheel, two first transmission screw rods are respectively and spirally connected with a movable block, a supporting frame is welded between the upper movable block and the lower movable block, the lower end of the inner wall of the supporting frame is provided with a groove, a second motor is arranged in the groove, the second motor is provided with a second transmission screw rod, a heat dissipation fan is arranged on the supporting block, the PLC controller is used for controlling the first motor to rotate so as to realize the left-right movement of the heat dissipation fan, the PLC controller is used for controlling the second motor to rotate so as to realize the up-down movement of the heat dissipation fan, and therefore, the heat dissipation, the heat dissipation effect is good.

Description

Switching power supply device and control method thereof
Technical Field
The invention belongs to the technical field of heat dissipation of switching power supplies, and particularly relates to a switching power supply device and a control method thereof.
Background
Most of the traditional power switch cabinet heat dissipation is natural heat dissipation of a heat dissipation window or heat dissipation is carried out through a heat dissipation fan, the heat dissipation requirement cannot be met due to natural dissipation of the heat dissipation window, internal heat cannot be evacuated in time, and when the heat dissipation is carried out through the fan, the fan is fixed in position and continuously works, so that the heat dissipation cannot be carried out on power devices in different positions in time, the energy is wasted, the use requirement cannot be met, and the problem is solved by the aid of the switching power supply device and the control method thereof.
Disclosure of Invention
The present invention is directed to a switching power supply device and a control method thereof to solve the problems of the related art.
In order to achieve the purpose, the invention provides the following technical scheme: a switching power supply device comprises a switch cabinet, threaded columns are symmetrically arranged on the top and the bottom of the switch cabinet in a bilateral mode, a rotating handle is welded at the outer side end of each threaded column, clamping blocks are connected at the inner side end of each threaded column in a threaded mode, the cross sections of the clamping blocks are C-shaped, a power switch mounting plate is clamped between the four clamping blocks, first transmission screw rods located at the front ends of the threaded columns are rotatably mounted at the top and the bottom of the switch cabinet respectively, the two first transmission screw rods are arranged in parallel, transmission belt wheels are mounted at the right ends of the two first transmission screw rods and connected through belts, a first motor located on the outer side of the switch cabinet is mounted at the left end of one first transmission screw rod, moving blocks are connected on the two first transmission screw rods in a threaded mode, a supporting frame is welded between the upper moving block and the lower block, and grooves are formed in the lower end of, install the second motor in the recess, install second transmission lead screw on the second motor, and the upper end of second transmission lead screw passes through the bearing and rotates the interior top of connecting braced frame, the direction litter is installed on the right side of second transmission lead screw, the spiro union has the supporting shoe that runs through the direction litter on the second transmission lead screw, install radiator fan on the supporting shoe, radiator fan is located the front side of switch mounting panel, temperature sensor is installed to the right side wall upper end of cubical switchboard.
Preferably, the front both ends of switch mounting panel are equipped with protruding double-screw bolt of longitudinal symmetry, and cup jointed the riser between the protruding double-screw bolt that aligns from top to bottom, be equipped with lock nut between the contact surface of protruding double-screw bolt and riser, the inside wall of two risers has been from last to having seted up the overlap joint groove to the equidistance down, is equipped with between the overlap joint groove of high parallel and level and walks the line diaphragm, walk equidistant seting up of line hole on the line diaphragm.
Preferably, the two ends of the wiring transverse plate are connected with the side wall of the switch cabinet through locking bolts, and threaded holes in threaded connection with the locking bolts are formed in the two ends of the wiring transverse plate.
Preferably, last hinged joint of cubical switchboard has the cabinet door, install the handle on the cabinet door, temperature monitor is installed to the right-hand member of handle, the PLC controller is installed to temperature monitor's below, install the button on the PLC controller, temperature monitor electric connection temperature sensor, first motor of PLC controller electric connection and second motor and radiator fan.
Preferably, the outside of cubical switchboard is equipped with the hole of airing exhaust, the dust screen is installed to the outside end in hole of airing exhaust.
A control method of the switching power supply device, comprising the steps of: come the inside temperature of response cubical switchboard through temperature sensor, and show through temperature monitor, when the inside high temperature of cubical switchboard, PLC controller control first motor drives two first transmission lead screws rotatoryly, the removal piece removes and drives braced frame and remove to the switch mounting panel front side, it is rotatory to start the second motor to drive the second transmission lead screw simultaneously, the supporting shoe can realize moving about and drive radiator fan and carry out the heat dissipation work to the switch on the switch mounting panel, the hole of airing exhaust can discharge the inside heat of cubical switchboard, the setting of dust screen can prevent that external dust from falling into in the cubical switchboard.
The invention has the technical effects and advantages that: according to the switching power supply device and the control method thereof, the first motor is controlled to rotate through the PLC, so that the left and right movement of the cooling fan can be realized, the second motor is controlled to rotate through the PLC, so that the up and down movement of the cooling fan can be realized, the cooling fan can be used for carrying out fixed-point cooling on the power supply switch in the switch cabinet, and the cooling effect is good.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
fig. 3 is a schematic structural diagram of the power switch mounting plate of the present invention.
In the figure: 1. a switch cabinet; 2. a threaded post; 3. a first drive screw; 4. a second drive screw; 5 moving blocks; 6. a support block; 7. a clamping block; 8. a lap joint groove; 9. a temperature sensor; 10. a first motor; 11. an air exhaust hole; 12. a dust screen; 13. a power switch mounting plate; 14. a vertical plate; 15. wiring transverse plates; 16. a second motor; 17. a guiding slide rod; 18. a wiring hole; 19. a threaded hole; 20. a cabinet door; 21. a temperature display; 22. a PLC controller; 23. a button; 24. a drive pulley; 25. a support frame; 26. a heat radiation fan; 27. and (4) a protruding stud.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a switching power supply device as shown in figures 1-3, which comprises a switch cabinet 1, wherein the top and the bottom of the switch cabinet 1 are in bilateral symmetry and are in threaded connection with threaded columns 2, the outer side ends of the threaded columns 2 are welded with rotating handles, the inner side ends of the threaded columns 2 are in threaded connection with clamping blocks 7, the cross sections of the clamping blocks 7 are C-shaped, and a power supply switch mounting plate 13 is clamped among the four clamping blocks 7. Through the rotatory handle of 2 outer ends of rotatory screw thread posts, the position of four fixture blocks 7 can be adjusted, and then conveniently take out switch mounting panel 13, conveniently overhaul work to it.
The top and the bottom of the switch cabinet 1 are rotatably provided with first transmission screw rods 3 positioned at the front ends of the threaded columns 2, the two first transmission screw rods 3 are arranged in parallel, the right ends of the two first transmission screw rods 3 are respectively provided with a transmission belt wheel 24, the transmission belt wheels 24 are connected through a belt, the left end of one first transmission screw rod 3 is provided with a first motor 10 positioned outside the switch cabinet 1, the two first transmission screw rods 3 are respectively connected with a movable block 5 in a threaded manner, a supporting frame 25 is welded between the upper and lower movable blocks 5, the lower end of the inner wall of the supporting frame 25 is provided with a groove, a second motor 16 is arranged in the groove, the second motor 16 is provided with a second transmission screw rod 4, the upper end of the second transmission screw rod 4 is rotatably connected with the inner top of the supporting frame 25 through a bearing, and the right side of the second transmission screw rod 4 is provided with a guide sliding rod 17, the second transmission screw rod 4 is connected with a supporting block 6 penetrating through the guide sliding rod 17 in a threaded mode, a cooling fan 26 is installed on the supporting block 6, the cooling fan 26 is located on the front side of the power switch installation plate 13, and a temperature sensor 9 is installed at the upper end of the right side wall of the switch cabinet 1.
Protruding studs 27 are symmetrically arranged at two ends of the front face of the power switch mounting plate 13 up and down, a vertical plate 14 is sleeved between the protruding studs 27 aligned up and down, locking nuts are arranged between contact surfaces of the protruding studs 27 and the vertical plate 14, and the protruding studs 27 are convenient to mount the vertical plate 14. The inside walls of the two vertical plates 14 are provided with overlapping grooves 8 at equal intervals from top to bottom, a wiring transverse plate 15 is arranged between the overlapping grooves 8 which are highly parallel and level, wiring holes 18 are formed in the wiring transverse plate 15 at equal intervals, and the wiring holes 18 are convenient for wiring. Two ends of the wiring transverse plate 15 are connected with the side wall of the switch cabinet 1 through locking bolts, and threaded holes 19 in threaded connection with the locking bolts are formed in the two ends of the wiring transverse plate 15.
Still hinged joint has cabinet door 20 on the cubical switchboard 1, install the handle on cabinet door 20, temperature display 21 is installed to the right-hand member of handle, PLC controller 22 is installed to temperature display 21's below, install button 23 on the PLC controller 22, temperature display 21 electric connection temperature sensor 9, PLC controller 22 electric connection first motor 10 and second motor 16 and radiator fan 26. The outside of cubical switchboard 1 is equipped with exhaust hole 11, dust screen 12 is installed to the outside end of exhaust hole 11.
A control method of the switching power supply device, comprising the steps of: come the inside temperature of response cubical switchboard 1 through temperature sensor 9, and show through temperature monitor 21, when the inside high temperature of cubical switchboard 1, PLC controller 22 control first motor 10 drives two first transmission lead screws 3 rotatory, moving block 5 removes and drives braced frame 25 and remove to switch mounting panel 13 front side, it is rotatory to start second motor 16 simultaneously to drive second transmission lead screw 4, supporting shoe 6 can realize moving from top to bottom and drive radiator fan 26 and carry out the heat dissipation work to the switch on switch mounting panel 13, the hole of airing exhaust 11 can arrange away the inside heat of cubical switchboard 1, the setting of dust screen 12 can prevent that external dust from falling into in cubical switchboard 1.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (6)

1. A switching power supply unit comprising a switchgear cabinet (1), characterized in that: the switch cabinet is characterized in that threaded columns (2) are symmetrically arranged at the top and the bottom of the switch cabinet (1) in a bilateral mode, a rotating handle is welded at the outer side end of each threaded column (2), fixture blocks (7) are connected at the inner side end of each threaded column (2) in a threaded mode, the cross section of each fixture block (7) is in a C shape, a power switch mounting plate (13) is clamped between the four fixture blocks (7), first transmission lead screws (3) located at the front ends of the threaded columns (2) are rotatably mounted at the top and the bottom of the switch cabinet (1), the two first transmission lead screws (3) are arranged in parallel, transmission belt wheels (24) are mounted at the right ends of the two first transmission lead screws (3), the transmission belt wheels (24) are connected through belts, a first motor (10) located on the outer side of the switch cabinet (1) is mounted at the left end of one of the first transmission lead screws (3), and moving blocks (5) are respectively connected to the two first, welding has braced frame (25) between upper and lower movable block (5), the inner wall lower extreme of braced frame (25) is seted up flutedly, install second motor (16) in the recess, install second transmission lead screw (4) on second motor (16), and the upper end of second transmission lead screw (4) rotates the interior top of connecting braced frame (25) through the bearing, direction litter (17) are installed on the right side of second transmission lead screw (4), spiro union has supporting shoe (6) of running through direction litter (17) on second transmission lead screw (4), install radiator fan (26) on supporting shoe (6), radiator fan (26) are located the front side of switch mounting panel (13), temperature sensor (9) are installed to the right side wall upper end of cubical switchboard (1).
2. A switching power supply unit according to claim 1, characterized in that: the power switch mounting panel (13) the front both ends longitudinal symmetry be equipped with protruding double-screw bolt (27), and cup jointed riser (14) between protruding double-screw bolt (27) of aligning from top to bottom, be equipped with lock nut between the contact surface of protruding double-screw bolt (27) and riser (14), the inside wall of two risers (14) has been from last to having seted up overlap joint groove (8) to lower equidistance, is equipped with between overlap joint groove (8) of high parallel and level and walks line diaphragm (15), walk line hole (18) of having seted up of equidistance on line diaphragm (15).
3. A switching power supply unit according to claim 2, characterized in that: the two ends of the wiring transverse plate (15) are connected with the side wall of the switch cabinet (1) through locking bolts, and threaded holes (19) in threaded connection with the locking bolts are formed in the two ends of the wiring transverse plate (15).
4. A switching power supply unit according to claim 1, characterized in that: it has cabinet door (20) to go back hinged joint on cubical switchboard (1), install the handle on cabinet door (20), temperature display (21) are installed to the right-hand member of handle, PLC controller (22) are installed to the below of temperature display (21), install button (23) on PLC controller (22), temperature display (21) electric connection temperature sensor (9), PLC controller (22) electric connection first motor (10) and second motor (16) and radiator fan (26).
5. A switching power supply unit according to claim 1, characterized in that: the outside of cubical switchboard (1) is equipped with hole (11) of airing exhaust, dust screen (12) are installed to the outside end of hole (11) of airing exhaust.
6. A control method of a switching power supply unit according to any one of claims 1 to 5, characterized by comprising the steps of: the temperature inside the switch cabinet (1) is sensed through the temperature sensor (9), and the temperature is displayed through the temperature display (21), when the temperature inside the switch cabinet (1) is too high, the PLC controller (22) controls the first motor (10) to drive the two first transmission screw rods (3) to rotate, the moving block (5) moves to drive the supporting frame (25) to move to the front side of the power switch mounting plate (13), the second motor (16) is started to drive the second transmission screw rods (4) to rotate simultaneously, the supporting block (6) can move up and down to drive the heat dissipation fan (26) to dissipate heat of a power switch on the power switch mounting plate (13), the heat inside the switch cabinet (1) can be discharged through the exhaust hole (11), and the dust screen (12) can be prevented from falling into the switch cabinet (1).
CN202010047573.5A 2020-01-16 2020-01-16 Switching power supply device and control method thereof Pending CN111130312A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010047573.5A CN111130312A (en) 2020-01-16 2020-01-16 Switching power supply device and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010047573.5A CN111130312A (en) 2020-01-16 2020-01-16 Switching power supply device and control method thereof

Publications (1)

Publication Number Publication Date
CN111130312A true CN111130312A (en) 2020-05-08

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Application Number Title Priority Date Filing Date
CN202010047573.5A Pending CN111130312A (en) 2020-01-16 2020-01-16 Switching power supply device and control method thereof

Country Status (1)

Country Link
CN (1) CN111130312A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113958839A (en) * 2021-09-27 2022-01-21 张昆仑 Multifunctional information display screen
CN117060256A (en) * 2023-10-12 2023-11-14 四川正禹电气设备有限公司 Power distribution cabinet

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103517615A (en) * 2012-06-27 2014-01-15 董祺文 Radiator
CN206165078U (en) * 2016-11-03 2017-05-10 毕洪岩 Two cooling fan's power scheduling rack
CN107565666A (en) * 2017-10-31 2018-01-09 安徽联喆玉竹有限公司 A kind of mobile charging stake with heat sinking function
CN207639063U (en) * 2017-11-14 2018-07-20 新疆捷诚信息技术有限公司 A kind of computer computer room heat radiation rack
CN208159091U (en) * 2018-04-17 2018-11-27 陕西理工大学 A kind of electrical equipment radiator
CN208425075U (en) * 2018-04-26 2019-01-22 天津滨海新区大港泰丰化工有限公司 A kind of chemical industry equipment instrument anti-dust protecting device
CN208480195U (en) * 2018-07-19 2019-02-05 广州叶晨信息科技有限公司 A kind of computer network controller
CN208480118U (en) * 2018-07-19 2019-02-05 广州叶晨信息科技有限公司 A kind of server cabinet
CN109769382A (en) * 2019-03-13 2019-05-17 中山市新颖电子科技有限公司 A kind of novel universal integrated circuit plate heat dissipating device
CN109982551A (en) * 2019-04-12 2019-07-05 赵洁 A kind of automatic control device based on PLC
CN110012644A (en) * 2019-04-10 2019-07-12 东北大学 A kind of removable auxiliary blower system for data center
CN209170801U (en) * 2018-09-07 2019-07-26 连云港逆光文化传媒有限公司 A kind of 3D video creating device and decomposer
CN209267698U (en) * 2018-10-16 2019-08-16 郑州朝虹科技有限公司 A kind of entertainment television having game function
CN209419999U (en) * 2018-11-27 2019-09-20 深圳市科昂精密科技有限公司 A kind of heat radiating type flexible print circuit board
CN209449149U (en) * 2018-12-27 2019-09-27 东莞市越美金属科技有限公司 A kind of waterproof intelligent radiator for communication apparatus
CN209882465U (en) * 2019-05-01 2019-12-31 韦沿吉 Communication cabinet convenient to heat dissipation
CN209949715U (en) * 2018-11-08 2020-01-14 广州市启力电脑设备制造有限公司 Double-panel integrated cabinet

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103517615A (en) * 2012-06-27 2014-01-15 董祺文 Radiator
CN206165078U (en) * 2016-11-03 2017-05-10 毕洪岩 Two cooling fan's power scheduling rack
CN107565666A (en) * 2017-10-31 2018-01-09 安徽联喆玉竹有限公司 A kind of mobile charging stake with heat sinking function
CN207639063U (en) * 2017-11-14 2018-07-20 新疆捷诚信息技术有限公司 A kind of computer computer room heat radiation rack
CN208159091U (en) * 2018-04-17 2018-11-27 陕西理工大学 A kind of electrical equipment radiator
CN208425075U (en) * 2018-04-26 2019-01-22 天津滨海新区大港泰丰化工有限公司 A kind of chemical industry equipment instrument anti-dust protecting device
CN208480195U (en) * 2018-07-19 2019-02-05 广州叶晨信息科技有限公司 A kind of computer network controller
CN208480118U (en) * 2018-07-19 2019-02-05 广州叶晨信息科技有限公司 A kind of server cabinet
CN209170801U (en) * 2018-09-07 2019-07-26 连云港逆光文化传媒有限公司 A kind of 3D video creating device and decomposer
CN209267698U (en) * 2018-10-16 2019-08-16 郑州朝虹科技有限公司 A kind of entertainment television having game function
CN209949715U (en) * 2018-11-08 2020-01-14 广州市启力电脑设备制造有限公司 Double-panel integrated cabinet
CN209419999U (en) * 2018-11-27 2019-09-20 深圳市科昂精密科技有限公司 A kind of heat radiating type flexible print circuit board
CN209449149U (en) * 2018-12-27 2019-09-27 东莞市越美金属科技有限公司 A kind of waterproof intelligent radiator for communication apparatus
CN109769382A (en) * 2019-03-13 2019-05-17 中山市新颖电子科技有限公司 A kind of novel universal integrated circuit plate heat dissipating device
CN110012644A (en) * 2019-04-10 2019-07-12 东北大学 A kind of removable auxiliary blower system for data center
CN109982551A (en) * 2019-04-12 2019-07-05 赵洁 A kind of automatic control device based on PLC
CN209882465U (en) * 2019-05-01 2019-12-31 韦沿吉 Communication cabinet convenient to heat dissipation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113958839A (en) * 2021-09-27 2022-01-21 张昆仑 Multifunctional information display screen
CN117060256A (en) * 2023-10-12 2023-11-14 四川正禹电气设备有限公司 Power distribution cabinet
CN117060256B (en) * 2023-10-12 2023-12-29 四川正禹电气设备有限公司 Power distribution cabinet

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Application publication date: 20200508