CN112152126B - Low-voltage switch cabinet body - Google Patents
Low-voltage switch cabinet body Download PDFInfo
- Publication number
- CN112152126B CN112152126B CN202011186566.XA CN202011186566A CN112152126B CN 112152126 B CN112152126 B CN 112152126B CN 202011186566 A CN202011186566 A CN 202011186566A CN 112152126 B CN112152126 B CN 112152126B
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- Prior art keywords
- cabinet body
- drawer
- heat dissipation
- sleeve
- voltage switch
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/32—Mounting of devices therein
- H02B1/34—Racks
- H02B1/36—Racks with withdrawable units
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/02—Details
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
- H02B11/127—Withdrawal mechanism
- H02B11/133—Withdrawal mechanism with interlock
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Drawers Of Furniture (AREA)
Abstract
The invention belongs to the technical field of electrical equipment, and particularly relates to a low-voltage switch cabinet body, which comprises a cabinet body and a drawer capable of being pulled relative to the cabinet body, wherein a temperature tester and an alarm unit are arranged in the cabinet body; an air bag layer is arranged in the cabinet body, and a first electromagnetic valve is arranged on the air bag layer; a heat dissipation chamber which can be communicated with the inside of the cabinet body is arranged on the outside of the cabinet body, and a heat dissipation fan, a liquid nitrogen bottle and a controller are arranged in the heat dissipation chamber; the liquid nitrogen bottle is connected with an exhaust pipe which can be communicated with the air bag layer, the exhaust pipe is provided with a second electromagnetic valve, and the controller is in communication connection with the temperature tester, the first electromagnetic valve and the second electromagnetic valve. By using the technical scheme, the problem that the structure inside the switch cabinet body cannot effectively deal with abnormal heating of the switch cabinet can be effectively solved.
Description
Technical Field
The invention belongs to the technical field of electrical equipment, and particularly relates to a cabinet body of a low-voltage switch cabinet.
Background
The low-voltage switch cabinet is suitable for industries such as power plants, petroleum, chemical industry, metallurgy, textile, high-rise buildings and the like, and is used for power transmission, power distribution and electric energy conversion. The low-voltage switch cabinet is used as important equipment for electric energy distribution, and plays an important role in modern power distribution network and engineering construction.
Inside of low-voltage switch cabinet has multiple electrical components and can produce a lot of heats at the during operation, leads to the inside temperature of low-voltage switch cabinet to rise, is unfavorable for the work of inside electrical components when ambient temperature is higher, can burn out electrical components sometimes even. To the above-mentioned problem, this technical problem is solved through setting up heat abstractor among the prior art, but current heat abstractor generally can only deal with the condition that components and parts normally generate heat, and when components and parts generate heat unusually, current heat abstractor can not be rapidly effectual messenger's components and parts cool down, makes components and parts burn out easily.
Disclosure of Invention
The invention aims to provide a cabinet body of a low-voltage switch cabinet, which aims to solve the problem that the internal structure of the switch cabinet body cannot effectively cope with abnormal heating of the switch cabinet.
In order to achieve the purpose, the scheme of the invention is as follows: a cabinet body of a low-voltage switch cabinet comprises a cabinet body and a drawer capable of being pulled relative to the cabinet body, wherein a temperature tester and an alarm unit are arranged in the cabinet body; an air bag layer is arranged in the cabinet body, and a first electromagnetic valve is arranged on the air bag layer; a heat dissipation chamber which can be communicated with the inside of the cabinet body is arranged on the outside of the cabinet body, and a heat dissipation fan, a liquid nitrogen bottle and a controller are arranged in the heat dissipation chamber; the liquid nitrogen bottle is connected with an exhaust pipe which can be communicated with the air bag layer, the exhaust pipe is provided with a second electromagnetic valve, and the controller is in communication connection with the temperature tester, the first electromagnetic valve and the second electromagnetic valve.
The working principle and the beneficial effects of the scheme are as follows:
under the normal conditions, the components in the cabinet body are cooled by the continuous work of the cooling fan, and the components are prevented from being burnt out. When the temperature tester detects that this internal temperature of cabinet is higher than the setting value (when the high temperature is unusual), the temperature tester feeds back the signal to the controller, and the controller control second solenoid valve opens fixed period earlier, and the liquid nitrogen bottle is opened, and the liquid nitrogen passes through the blast pipe and gets into in the gasbag layer, and in this in-process liquid nitrogen gasifies the heat absorption rapidly, reduces this internal temperature of cabinet body. After the air bag is expanded, the controller controls the second electromagnetic valve to be closed, and after the air bag is static for a period of time, the controller controls the first electromagnetic valve to be opened for a fixed time, so that the first electromagnetic valve is controlled to be closed after the air in the air bag layer is completely discharged. If the temperature in the cabinet body is still higher than the set value, the controller continuously controls the second electromagnetic valve to be opened for a fixed period of time and then closed, keeps the second electromagnetic valve for a period of time, and then controls the first electromagnetic valve to be opened for a fixed period of time and then closed.
Under the general condition, radiator fan normal work can make the internal components and parts of cabinet body normally dispel the heat, avoids components and parts to be burnt out, but radiator fan's radiating force is not enough when generating heat unusually. In this scheme, set up the temperature tester, the temperature tester can detect this internal temperature of the cabinet body at any time, makes parts work such as first solenoid valve of controller in time control, second solenoid valve when the temperature risees unusually, makes the liquid nitrogen advance to go into parts work such as gasbag in-layer and stop a period, and the heat absorption during liquid nitrogen gasification for this internal temperature of the cabinet body reduces rapidly, can effectively deal with the abnormal problem that generates heat of cubical switchboard. The liquid nitrogen can stay for a period of time in the air bag layer, so that components in the cabinet body can be cooled sufficiently, and the problem of energy waste caused by the continuous cold source supplement due to the rapid dissipation of the cold source is avoided.
Optionally, the cabinet body is provided with a heat dissipation opening and a buffer chamber opposite to the heat dissipation opening; the bottom of the buffer chamber is obliquely and downwards arranged towards one side far away from the cabinet body; the side wall of the buffer chamber opposite to the heat dissipation port is provided with heat dissipation holes. The heat dissipation port is formed, so that external dust, rainwater and the like can easily enter the cabinet body through the heat dissipation port, and the normal work of electrical elements in the cabinet body is influenced. The buffer chamber opposite to the heat dissipation opening is arranged on the cabinet body, and under the action of the buffer chamber, external dust and rainwater cannot directly enter the cabinet body, so that the influence of the external dust and rainwater on the internal electrical elements of the cabinet body is effectively avoided.
Optionally, the cabinet body is processed by an aluminum-zinc coated plate. The aluminum-coated zinc plate has high hardness, is not easy to deform, is corrosion-resistant and oxidation-resistant, and is suitable for processing the cabinet body by adopting the aluminum-coated zinc plate.
Optionally, the alarm unit is a buzzer, and the buzzer is in communication connection with the controller. After the temperature tester transmits the abnormal temperature signal to the controller, the controller makes the buzzer sound to remind workers to check the switch cabinet as soon as possible.
Optionally, a sleeve and piston cylinders respectively located at two sides of the rear side wall are arranged on the rear side wall of the drawer, a piston is connected to the piston cylinder in a sliding manner, a supporting rod penetrating through the piston cylinder and connected with the piston cylinder in a sealing manner is fixed on the piston, mounting seats located outside the piston cylinder are fixed on the supporting rod, an incoming line moving contact is arranged on one of the mounting seats, and an outgoing line moving contact is arranged on the other mounting seat; the sleeve is filled with hydraulic oil, and a sealing plate and an elastic piece for resetting the sealing plate are connected in the sleeve in a sliding manner; the inner wall of the sleeve is provided with a limiting groove, and the sealing plate is provided with a connecting block which is connected in the limiting groove in a sliding manner; an incoming line static contact matched with the incoming line moving contact, an outgoing line static contact matched with the outgoing line moving contact and a top column of which one end can extend into the sleeve are arranged in the cabinet body; a pipeline is connected between the sleeve and the piston cylinder, the joint of the piston cylinder and the pipeline is close to one end of the mounting seat, and the moving speed of the sealing plate is greater than that of the piston.
With the drawer propulsion cabinet internal, when the drawer is close to cabinet internal portion, sleeve on the drawer embolias the fore-set, under the effect of fore-set, the closing plate slides and extrudees the hydraulic oil in the sleeve gradually along the sleeve inner wall, hydraulic oil passes through in the pipeline gets into the piston cylinder gradually, the mount pad on the piston drives branch removes to drawer one side under the effect of hydraulic oil, the direction of motion of mount pad is opposite with the direction of motion of drawer, and the speed of motion of mount pad is less than the speed of motion of drawer, wholly be equivalent to the mount pad and to cabinet internal portion one side slow movement. When the drawer is completely closed in the cabinet body and the sealing plate moves to the limit position, the mounting seat also moves to a proper position along with the piston, and the incoming line moving contact and the incoming line static contact on the mounting seat and the outgoing line moving contact and the outgoing line static contact on the mounting seat are in good contact fit. When the drawer is pulled out of the cabinet body, the drawer is moved to one side far away from the cabinet body by operating the propelling mechanism, the sleeve and the top column are gradually far away from each other, under the action of the elastic piece, the sealing plate gradually moves to one side far away from the drawer, hydraulic oil gradually flows back into the sleeve, the piston and the mounting seat move to one side far away from the drawer at the moment, the movement direction of the mounting seat is opposite to that of the drawer, the movement speed of the mounting seat is slower than that of the drawer, the mounting seat integrally moves slowly to one side far away from the cabinet body, an incoming line moving contact and an incoming line static contact on the mounting seat, and an outgoing line moving contact and an outgoing line static contact on the mounting seat are in slow contact fit.
When the cabinet body is to be completely closed in the cabinet body, the top column is in contact with the sealing plate in the sleeve, so that hydraulic oil slowly flows out, the hydraulic oil in the sleeve effectively slows down the moving speed of the drawer, the stress between the drawer and the cabinet body is effectively buffered, and the probability that elements are damaged by collision is reduced. When the drawer is driven to move, when the inlet wire moving contact and the inlet wire fixed contact on the mounting seat and the outlet wire moving contact and the outlet wire fixed contact on the mounting seat are in contact fit, the moving speed of the mounting seat can be effectively reduced on the premise of not influencing the overall moving speed of the drawer, so that the moving contact and the fixed contact can be slowly and stably jointed or separated, and the probability of damage of the contact is reduced.
Optionally, the left side wall and the right side wall of the drawer are both provided with guide blocks, and the drawer body is internally provided with guide grooves for the guide blocks to be connected in a sliding mode. The arrangement of the guide block and the guide groove has guiding and positioning effects on the drawer, and when the drawer is pushed, the incoming line moving contact can be well matched with the incoming line static contact and the outgoing line moving contact can be well matched with the outgoing line static contact.
Optionally, a ball in the guide groove is rotatably connected to the guide block. The sliding friction between the guide block and the cabinet body can be changed into rolling friction by the aid of the balls, and abrasion of the guide block and the cabinet body is reduced.
Optionally, a pushing mechanism is arranged on the drawer, the pushing mechanism comprises a mounting bracket arranged on the bottom plate of the drawer and a screw rod rotatably connected to the mounting bracket, and the mounting bracket is positioned at one side close to the panel of the drawer; the cabinet body is provided with a push rod, the upper end of the push rod can extend into the spiral groove of the screw rod and is matched with the spiral groove of the screw rod; one end of the screw rod is connected with a driving piece, and the driving piece penetrates through a panel of the drawer. When the drawer needs to be closed on the cabinet body, the drawer firstly extends into the cabinet body, the drawer is pushed to slowly slide towards the interior of the cabinet body, and when the screw rod is in contact with the push rod, the drawer cannot continuously move under the blocking of the push rod. At the moment, the screw rod is rotated towards a fixed direction through the driving piece and the drawer is slightly pushed forwards, and the upper end of the pushing rod enters the spiral groove of the screw rod; the screw rod is continuously rotated, the drawer moves towards the inside of the cabinet body under the combined action of the screw rod and the pushing rod, and after the pushing rod is disengaged from the spiral groove of the screw rod, the drawer is completely closed in the cabinet body and is located at a working position. Set up advancing mechanism in this scheme, after the cabinet body is stretched into to most structure of drawer, the lead screw contacts with the pushing ram, operates advancing mechanism this moment and enables comparatively steady, the slow removal of drawer, avoids the drawer and the component on the cabinet body to be used for violent impact and takes place to damage.
Optionally, a through hole is formed in the side wall of the sleeve, a groove capable of being opposite to the through hole is formed in the top column, a rack capable of extending into the through hole is connected in the cabinet body in a sliding mode, and a positioning block capable of extending into the groove is arranged on the rack; one end of the screw rod facing the cabinet body is connected with a rotating shaft, and a gear capable of being meshed with the rack is arranged on the rotating shaft; when the drawer is completely closed in the cabinet body, the spiral groove of the screw rod is disengaged from the pushing rod, and the rack can be meshed with the gear. When the sealing plate moves to the limit position, the drawer is completely closed in the cabinet body, the driving gear is meshed with the driven gear, and at the moment, the spiral groove of the screw rod is disengaged from the pushing rod. The screw rod is continuously driven to rotate, the drawer can keep static, the rotating shaft rotates along with the screw rod, the rack moves towards one side of the ejection column through the transmission effect of the gear and the rack, and the positioning block on the rack gradually extends into the groove. When the positioning block on the rack completely extends into the groove, the screw rod stops moving. Locating piece and recess block, sleeve, closing plate, drawer isotructure homoenergetic obtain fine relatively fixed, exert the pulling force to the drawer this moment and also can't make the drawer break away from the cabinet body, have carried out the locking to the cabinet body in other words, make stable the being located operating position of drawer, need not to set up locking mechanism alone and fix the drawer.
Optionally, the teeth on the rack and the pinion are helical teeth. The helical gear is arranged, so that the rack and the gear can be better meshed.
Drawings
Fig. 1 is a cross-sectional view of a cabinet body of a low-voltage switch cabinet according to an embodiment of the invention;
FIG. 2 is a sectional view of the second embodiment of the present invention taken along the top of the cabinet body after the drawer is pulled out;
FIG. 3 is a sectional view of a drawer closed in the cabinet body in a top view according to the second embodiment of the present invention;
fig. 4 is a structural diagram of a screw rod and a mounting bracket in a propulsion mechanism according to a second embodiment of the invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the cabinet comprises a cabinet body 10, a heat dissipation port 11, a buffer chamber 20, a heat dissipation hole 21, a heat dissipation chamber 30, a liquid nitrogen bottle 31, an exhaust pipe 311, a second electromagnetic valve 312, a heat dissipation fan 32, an air bag layer 40, a drawer 50, a mounting bracket 51, a screw rod 52, a rotating shaft 53, a gear 54, a rack 55, a push rod 56, a piston cylinder 60, a piston 61, a support rod 62, a mounting seat 63, an incoming line moving contact 64, an outgoing line moving contact 65, a pipeline 66, a sleeve 70, a sealing plate 71, an elastic piece 72, a limiting groove 73, a through hole 74, an incoming line static contact 80, an outgoing line static contact 81 and a support 90.
Example one
This embodiment is substantially as shown in fig. 1: the utility model provides a low-voltage switchgear cabinet body, includes cabinet body 10 and the drawer 50 of cabinet body 10 pull relatively, and cabinet body 10 adopts the processing of aluminizing zinc sheet to obtain, and aluminizing zinc sheet hardness is high, and non-deformable has corrosion-resistant and anti-oxidant characteristics, and it is comparatively suitable to adopt aluminizing zinc sheet processing cabinet body 10. The side wall of the cabinet body 10 is provided with a heat dissipation opening 11, the outer wall of the cabinet body 10 is welded with a buffer chamber 20 opposite to the heat dissipation opening 11, and the side wall of the buffer chamber 20 opposite to the heat dissipation opening 11 is provided with a heat dissipation hole 21. The bottom of surge chamber 20 sets up downwards to the lopsidedness of keeping away from cabinet body 10, and external dust, rainwater get into in the surge chamber 20 back, can slide to keeping away from cabinet body 10 one side along the bottom of surge chamber 20 under self action of gravity, avoid external dust, rainwater to get into in the cabinet body 10.
A temperature tester and an alarm unit are arranged in the cabinet body 10, and the temperature tester is used for testing the temperature in the cabinet body 10; in this embodiment, the alarm unit is a buzzer. An air bag layer 40 is adhered in the cabinet body 10, and a first electromagnetic valve is installed on the air bag layer 40. The outer wall of the cabinet body 10 is welded with a heat dissipation chamber 30 which can be communicated with the inside of the cabinet body 10, and a heat dissipation fan 32, a liquid nitrogen bottle 31 and a controller are installed in the heat dissipation chamber 30. An exhaust pipe 311 is connected to the liquid nitrogen bottle 31, one end of the exhaust pipe 311 is communicated with the air bag layer 40, a second electromagnetic valve 312 is installed on the exhaust pipe 311, and the controller is in communication connection with the temperature tester, the buzzer, the first electromagnetic valve and the second electromagnetic valve 312. In the scheme, the controller is a controller of Mitsubishi corporation model Q00 JCPU-SET.
Under normal conditions, the heat dissipation fan 32 continuously operates to dissipate heat of the components in the cabinet body 10, thereby avoiding burning out of the components. When the temperature tester detects that the temperature in the cabinet body 10 is higher than the set value (when the temperature is too high and abnormal), the temperature tester feeds back the signal to the controller, and the controller controls the buzzer to work and make a sound, reminds the staff of temperature anomaly in the low-voltage switch cabinet, and needs to pay special attention. Meanwhile, the controller controls the second electromagnetic valve 312 to be opened for a fixed period of time, the liquid nitrogen bottle 31 is opened, the liquid nitrogen enters the air bag layer 40 through the exhaust pipe 311, and the liquid nitrogen is rapidly gasified and absorbs heat in the process, so that the temperature in the cabinet body 10 is reduced. After the airbag is inflated, the controller controls the second electromagnetic valve 312 to close, and after the airbag is stationary for a period of time, the controller controls the first electromagnetic valve to open for a fixed time, so that the first electromagnetic valve is controlled to close after the gas in the airbag layer 40 is completely discharged. If the temperature in the cabinet body 10 is still higher than the set value, the controller continues to control the second electromagnetic valve 312 to open for a fixed period of time and then close, and then controls the first electromagnetic valve to open for a fixed period of time and then close.
Example two
The present embodiment is different from the first embodiment in that: as shown in fig. 2 and 3, a piston cylinder 60 is fixedly mounted on both sides of the rear side wall of the drawer 50, and one end of the piston cylinder 60 close to the drawer 50 is open. The piston cylinder 60 is connected with a piston 61 in a sliding and sealing manner, a supporting rod 62 which penetrates through the piston cylinder 60 and can be connected with the piston cylinder 60 in a sealing manner is fixed on the piston 61, mounting seats 63 which are positioned outside the piston cylinder 60 are welded on the supporting rod 62, an incoming line moving contact 64 is fixedly mounted on one mounting seat 63, and an outgoing line moving contact 65 is fixedly mounted on the other mounting seat 63. A sleeve 70 is further fixed on the rear side wall of the drawer 50, the sleeve 70 is fixed between the two piston cylinders 60, one end of the sleeve 70, which is far away from the drawer 50, is open, and hydraulic oil is filled in the sleeve 70. A sealing plate 71 is slidably and hermetically connected in the sleeve 70, and an elastic member 72 for restoring the sealing plate 71 is further provided in the sleeve 70, in this embodiment, the elastic member 72 is a compression spring, one end of the compression spring is connected to the inner wall of the sleeve 70, and the other end of the compression spring is connected to the sealing plate 71. The inner wall of the sleeve 70 is provided with a limiting groove 73 distributed along the axial direction of the sleeve 70, a connecting block connected in the limiting groove 73 in a sliding manner is fixed on the sealing plate 71, and the sealing plate 71 can only slide in a fixed range under the combined action of the limiting groove 73 and the connecting block. An incoming line static contact 80 and an outgoing line static contact 81 are fixedly mounted in the cabinet body, the incoming line static contact 80 can be matched with the incoming line moving contact 64, and the outgoing line static contact 81 can be matched with the outgoing line moving contact 65. The cabinet body is welded with a top column 90, and the top column 90 can extend into the sleeve 70 and contact with the sealing plate 71. A conduit 66 is connected between the side of the sleeve 70 adjacent to the drawer 50 and the side of the piston cylinder 60 adjacent to the mounting 63, and hydraulic oil in the sleeve 70 can be supplied to the piston cylinder 60 through the conduit 66. The combined cross-sectional area of the two piston cylinders 60 is larger than the cross-sectional area of the sleeve 70, and the moving speed of the seal plate 71 is larger than that of the piston 61.
The guide blocks are welded on the left side wall and the right side wall of the drawer 50, and guide grooves for the guide blocks to be in sliding connection are formed in the drawer 50. The arrangement of the guide block and the guide groove has guiding and positioning effects on the drawer 50, and when the drawer 50 is pushed, the incoming line moving contact 64 can be well matched with the incoming line static contact 80, the outgoing line moving contact 65 can be well matched with the outgoing line static contact 81. The guide block is rotatably connected with balls located in the guide grooves, and the balls are arranged, so that abrasion of the guide block and the cabinet body 10 is reduced.
The drawer 50 is provided with a propelling mechanism, and the drawer 50 can be better moved in the cabinet body through a propelling unit. As shown in fig. 4, the pushing mechanism includes a mounting bracket 51 and a screw 52, and the mounting bracket 51 is fixed to the lower sidewall of the drawer 50 by a fastener such as a screw. The lead screw 52 is rotatably connected to a mounting bracket 51, and the mounting bracket 51 is located at a side close to the drawer panel. The cabinet body is welded with a push rod 56, the upper end of the push rod 56 can extend into the spiral groove of the screw rod 52, and the push rod 56 is matched with the spiral groove of the screw rod 52. A driving member is connected to one end of the screw 52 and penetrates through the panel of the drawer 50. The drawer 50 can be moved by rotating the screw 52 in a fixed direction by the driving member.
The side wall of the sleeve 70 is provided with a through hole 74, the top pillar 90 is provided with a groove opposite to the through hole 74, the cabinet body 10 is slidably connected with a rack 55 capable of extending into the through hole 74, and the rack 55 is welded with a positioning block capable of extending into the groove. One end of the screw rod 52 facing the cabinet body is connected with a rotating shaft 53, a gear 54 capable of being meshed with a rack 55 is fixed on the rotating shaft 53, and gear teeth on the rack 55 and the gear 54 are helical teeth. When the drawer 50 is fully closed in the cabinet, the helical groove of the lead screw is disengaged from the push rod 56, and the driving gear 54 can be engaged with the driven gear 54.
When the drawer 50 needs to be closed on the cabinet body, and the drawer 50 is located at the working position, the drawer 50 firstly extends into the cabinet body, the drawer 50 is pushed to slowly slide towards the inside of the cabinet body, and when the screw rod is in contact with the push rod 56, the drawer 50 cannot move continuously under the blocking of the push rod 56. At this time, the screw rod 52 is rotated towards a fixed direction through the driving part and the drawer 50 is slightly pushed forwards, the upper end of the pushing rod 56 enters the spiral groove of the screw rod 52, the screw rod 52 is continuously rotated, the drawer 50 moves towards the inside of the cabinet body under the combined action of the screw rod 52 and the pushing rod 56, after the pushing rod 56 is disengaged from the spiral groove of the screw rod 52, the drawer 50 is completely closed in the cabinet body, and the drawer 50 is located at a working position.
When the drawer 50 is gradually moved toward the cabinet interior by operating the pushing mechanism, the gear 54 on the rotary shaft 53 is gradually moved toward the rack 55. Meanwhile, the top pillar 90 is sleeved in the sleeve 70 on the drawer 50, and under the action of the top pillar 90, the sealing plate 71 slides along the inner wall of the sleeve 70 and gradually presses the hydraulic oil in the sleeve 70. When the sealing plate 71 moves to the limit position, the drawer 50 is completely closed in the cabinet, the driving gear 54 is meshed with the driven gear 54, and the spiral groove of the lead screw is disengaged from the pushing rod 56. The screw 52 is continuously driven to rotate, the drawer 50 can keep still, the rotating shaft 53 rotates along with the screw, the rack 55 moves towards one side of the top column 90 through the transmission effect of the gear 54 and the rack 55, and the positioning block on the rack 55 gradually extends into the groove. When the positioning block on the rack 55 completely extends into the groove, the screw 52 stops moving. The locating block is clamped with the groove, the structures such as the sleeve 70, the sealing plate 71 and the drawer 50 can be well fixed relatively, the drawer 50 can not be separated from the cabinet body even if tensile force is applied to the drawer 50, the cabinet body is locked, the drawer 50 is stably located at the working position, and a locking mechanism is not required to be arranged independently to fix the drawer 50.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.
Claims (9)
1. The utility model provides a low-voltage switchgear cabinet body which characterized in that: the temperature measuring cabinet comprises a cabinet body and a drawer capable of being pulled relative to the cabinet body, wherein a temperature tester and an alarm unit are arranged in the cabinet body; an air bag layer is arranged in the cabinet body, and a first electromagnetic valve is arranged on the air bag layer; a heat dissipation chamber which can be communicated with the inside of the cabinet body is arranged on the outside of the cabinet body, and a heat dissipation fan, a liquid nitrogen bottle and a controller are arranged in the heat dissipation chamber; the liquid nitrogen bottle is connected with an exhaust pipe which can be communicated with the air bag layer, the exhaust pipe is provided with a second electromagnetic valve, and the controller is in communication connection with the temperature tester, the first electromagnetic valve and the second electromagnetic valve; the rear side wall of the drawer is provided with a sleeve and piston cylinders respectively positioned at two sides of the rear side wall, the piston cylinders are connected with a piston in a sliding way, a supporting rod which penetrates through the piston cylinders and is connected with the piston cylinders in a sealing way is fixed on the piston, mounting seats positioned outside the piston cylinders are fixed on the supporting rod, one of the mounting seats is provided with an incoming line moving contact, and the other mounting seat is provided with an outgoing line moving contact; the sleeve is filled with hydraulic oil, and a sealing plate and an elastic piece for resetting the sealing plate are connected in the sleeve in a sliding manner; the inner wall of the sleeve is provided with a limiting groove, and the sealing plate is provided with a connecting block which is connected in the limiting groove in a sliding manner; an incoming line static contact matched with the incoming line moving contact, an outgoing line static contact matched with the outgoing line moving contact and a top column of which one end can extend into the sleeve are arranged in the cabinet body; a pipeline is connected between the sleeve and the piston cylinder, the joint of the piston cylinder and the pipeline is close to one end of the mounting seat, and the moving speed of the sealing plate is greater than that of the piston.
2. The low-voltage switch cabinet body according to claim 1, characterized in that: the cabinet body is provided with a heat dissipation opening and a buffer chamber opposite to the heat dissipation opening; the bottom of the buffer chamber is obliquely and downwards arranged towards one side far away from the cabinet body; the side wall of the buffer chamber opposite to the heat dissipation port is provided with heat dissipation holes.
3. The low-voltage switch cabinet body as claimed in claim 2, characterized in that: the cabinet body is processed by an aluminum-coated zinc plate.
4. The low-voltage switch cabinet body according to claim 3, characterized in that: the alarm unit is a buzzer, and the buzzer is in communication connection with the controller.
5. The low-voltage switch cabinet body according to claim 1, characterized in that: the left side wall and the right side wall of the drawer are both provided with guide blocks, and the drawer body is internally provided with guide grooves for the guide blocks to be connected in a sliding manner.
6. The low-voltage switch cabinet body according to claim 5, characterized in that: the guide block is rotatably connected with a ball positioned in the guide groove.
7. The low-voltage switch cabinet body according to claim 6, characterized in that: the drawer is provided with a propelling mechanism, the propelling mechanism comprises a mounting bracket arranged on a bottom plate of the drawer and a screw rod rotatably connected to the mounting bracket, and the mounting bracket is positioned at one side close to a panel of the drawer; the cabinet body is provided with a push rod, the upper end of the push rod can extend into the spiral groove of the screw rod and is matched with the spiral groove of the screw rod; one end of the screw rod is connected with a driving piece, and the driving piece penetrates through a panel of the drawer.
8. The low-voltage switch cabinet body according to claim 7, characterized in that: a through hole is formed in the side wall of the sleeve, a groove capable of being opposite to the through hole is formed in the top column, a rack capable of extending into the through hole is connected in the cabinet body in a sliding mode, and a positioning block capable of extending into the groove is arranged on the rack; one end of the screw rod facing the cabinet body is connected with a rotating shaft, and a gear capable of being meshed with the rack is arranged on the rotating shaft; when the drawer is completely closed in the cabinet body, the spiral groove of the screw rod is disengaged from the pushing rod, and the rack can be meshed with the gear.
9. The low-voltage switch cabinet body according to claim 8, characterized in that: the gear teeth on the rack and the gear are helical teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011186566.XA CN112152126B (en) | 2020-10-30 | 2020-10-30 | Low-voltage switch cabinet body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011186566.XA CN112152126B (en) | 2020-10-30 | 2020-10-30 | Low-voltage switch cabinet body |
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| CN112152126A CN112152126A (en) | 2020-12-29 |
| CN112152126B true CN112152126B (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011186566.XA Active CN112152126B (en) | 2020-10-30 | 2020-10-30 | Low-voltage switch cabinet body |
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| Country | Link |
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| CN (1) | CN112152126B (en) |
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| CN112152126A (en) | 2020-12-29 |
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