CN202735875U - Constant temperature positive pressure protection system of control cabinet - Google Patents
Constant temperature positive pressure protection system of control cabinet Download PDFInfo
- Publication number
- CN202735875U CN202735875U CN 201220311198 CN201220311198U CN202735875U CN 202735875 U CN202735875 U CN 202735875U CN 201220311198 CN201220311198 CN 201220311198 CN 201220311198 U CN201220311198 U CN 201220311198U CN 202735875 U CN202735875 U CN 202735875U
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- switch board
- control cabinet
- solenoid valve
- channel
- way solenoid
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Abstract
The utility model provides a constant temperature positive pressure protection system of a control cabinet and relates to a control cabinet flameproof explosion-proof system, so as to solve the problem that components can not operate stably due to high temperature inside the existing positive pressure control cabinet. The system comprises a compressed air source, a three-way solenoid valve, a pressure reducing valve, an overpressure protection valve, a vortex cooler, a thermal resistor and a temperature controller, wherein the first channel of the three-way solenoid valve is connected with the compressed air source; the pressure reducing valve is connected with the second channel of the three-way solenoid valve and the output end is communicated with the control cabinet; the overpressure protection valve is arranged at the top of the control cabinet; the air input end of the vortex cooler is connected with the third channel of the three-way solenoid valve, the cold air output end is communicated with the control cabinet, and the hot air output end is communicated with the air; the temperature measuring end of the thermal resistor is arranged inside the control cabinet; and the temperature controller is connected with the thermal resistor, and the output end is connected with the power control end of the three-way solenoid valve. The system uses the simple and reliable vortex cooler to cool the control cabinet, positive pressure is ensured to exist inside the control cabinet, constant temperature control is carried out on the control cabinet, flameproof explosion-proof functions of the control cabinet can be ensured and the components inside the control cabinet can be enabled to operate stably for a long time.
Description
Technical field
The utility model relates to switch board burn-proof and explosion prevention system, refers in particular to a kind of constant temperature positive pressure protection system that stops extraneous inflammable and explosive medium to enter the field control cabinet.
Background technology
On-the-spot in Chemical Manufacture, enter in the field control cabinet for stoping extraneous inflammable and explosive medium, must carry out positive pressure protection to being installed in on-the-spot switch board, to reach explosion-proof purpose.
Existing switch board positive-pressure explosion-proof system is referring to Fig. 1, and it comprises:
Compressed air source 11 is power sources of malleation in the switch board, places switch board 10 outsides;
In the above-mentioned positive-pressure explosion-proof system; when using pressurized air that switch board is carried out positive pressure protection; owing to will send certain heat when the control components and parts work in the switch board; add the scene of being installed in without covering measure; cause control in-cabinet temperature generally summer all above 55 ℃, seriously shortened the life-span of electronic devices and components.
In order to guarantee the long-time steady operation of components and parts energy in the positive pressure control cabinet, just must cool off switch board.
The utility model content
The purpose of this utility model is the problem that exists in order to overcome prior art, and a kind of constant temperature positive pressure protection system of switch board is provided, and can solve the temperature control problem in the positive pressure control cabinet, guarantees that the instrumentation in the positive pressure control cabinet can steady operation.
The purpose of this utility model is achieved through the following technical solutions:
A kind of constant temperature positive pressure protection system of switch board, it comprises:
Compressed air source places the outside of described switch board;
Three-way solenoid valve has three passages and a power control terminal, and wherein: solenoid valve must not when electricity, and first passage is connected with second channel, the third channel closure; Solenoid valve gets when electric, and first passage is connected with third channel, and second channel is closed; Described first passage connects described compressed air source by pipeline;
Reduction valve is the air reducing valve with the artificial atmosphere switch, and its input end is connected with the second channel of described three-way solenoid valve by pipeline, and output terminal is communicated with described switch board by pipeline;
The overvoltage protection valve is located at the top of described switch board, and the one end is communicated with switch board, and the other end leads to atmosphere;
The eddy current refrigeratory is located at the top of switch board, and its air input end is logical by the third channel that pipeline connects described three-way solenoid valve, and the cold air output terminal of its bottom is communicated with switch board, and the hot-air output terminal at top is communicated with atmosphere;
Thermal resistance is temperature sensor, and its thermometric end places in the switch board;
Temperature controller, its signal input part connects the signal output part of described thermal resistance by wire, and its signal output part connects the power control terminal of described three-way solenoid valve by wire.
The model that described eddy current refrigeratory adopts is: EXAIR 3215.
The model that described temperature controller adopts is: KBOLD TDD-1.
The beneficial effects of the utility model:
The constant temperature positive pressure protection system of switch board of the present utility model; use simple and reliable eddy current refrigeratory as the cooling device of switch board; when can be malleation in guaranteeing switch board; switch board is carried out thermostatic control; not only guarantee the burn-proof and explosion prevention function of switch board but also can make the interior long-time steady operation of components and parts of switch board, prolonged the life-span of electronic devices and components.
For further specifying above-mentioned purpose of the present utility model, design feature and effect, below with reference to accompanying drawing the utility model is elaborated.
Description of drawings
Fig. 1 is the positive-pressure explosion-proof system schematic of existing switch board;
Fig. 2 is the constant temperature positive pressure protection system schematic of the utility model switch board.
Embodiment
Accompanying drawing below in conjunction with embodiment is elaborated to embodiment of the present utility model.
Referring to Fig. 2, the constant temperature positive pressure protection system of the utility model switch board comprises:
Compressed air source 21 places switch board 20 outsides;
Three-way solenoid valve 22, it has three passages and a power control terminal, and wherein: solenoid valve must not when electricity, and first passage 221 is connected with second channel 222, third channel 223 closures; Solenoid valve gets when electric, and first passage 221 is connected with third channel 223, second channel 222 closures; Described first passage 221 connects compressed air source 21 by pipeline;
Eddy current refrigeratory 26, be located at the top of switch board 20, its air input end is by the third channel logical 223 of pipeline connecting tee solenoid valve 22, the cold air output terminal of its bottom is communicated with switch board 20, the hot-air output terminal at top is communicated with atmosphere, and eddy current refrigeratory 26 adopts the eddy current refrigeratory of existing EXAIR 3215 models in the present embodiment;
Fig. 2 cathetus passage is pipeline, and two point dotted line passage is wire.
In the said system, before pressurized air enters reduction valve 23, pass through first three-way solenoid valve 22.The power control terminal of this three-way solenoid valve 22 is controlled by temperature controller 24.When thermal resistance 25 records switch board 20 interior temperature when low, temperature controller 24 control three-way solenoid valves 22 must not be electric, its first passage 221 is connected with second channel 222, third channel 223 closures, at this moment, pressurized air (this operator scheme is generally used in winter) in reduction valve 23 enters switch board 20.When thermal resistance 25 records switch board 20 interior temperature when high, three-way solenoid valve 22 electric, its first passage 221 is connected with third channel 223, second channel 222 closures, at this moment, pressurized air directly enters eddy current refrigeratory 26 without reduction valve.Because eddy current refrigeratory 26 adopts pressurized air as power source; part pressurized air becomes hot-air and discharges from eddy current refrigeratory 26 tops; part cooling-air (surpasses 0.4MPa such as compressed air pressure; its temperature can be lower than-10 ℃) be expelled in the switch board 20 from eddy current refrigeratory 26 bottoms; when switch board is cooled off, switch board is carried out positive pressure protection.When temperature was reduced to the low temperature of setting, the signal of thermal resistance 25 output made the temperature controller 24 control three-way solenoid valves 22 must not electricity, and three-way solenoid valve quits work, and pressurized air enters in the switch board 20 through reduction valve 23 again.This system can guarantee that temperature constant is at 30 ± 5 ℃ in the switch board.
Owing to adopted the eddy current refrigeratory as cooling device, greatly simplified cooling control system.In addition, keep the overvoltage protection valve at the switch board top, when the cabinet internal pressure is too high, can effectively protect the safety of switch board.
Those of ordinary skill in the art will be appreciated that, above embodiment illustrates the purpose of this utility model, and be not with opposing restriction of the present utility model, as long as in essential scope of the present utility model, all will drop in the scope of claim of the present utility model variation, the modification of the above embodiment.
Claims (3)
1. the constant temperature positive pressure protection system of a switch board is characterized in that comprising:
Compressed air source (21) places the outside of described switch board (20);
Three-way solenoid valve (22) has three passages and a power control terminal, and wherein: solenoid valve must not when electricity, and first passage (221) is connected with second channel (222), third channel (223) closure; Solenoid valve gets when electric, and first passage (221) is connected with third channel (223), second channel (222) closure; Described first passage (221) connects described compressed air source (21) by pipeline;
Reduction valve (23) is the air reducing valve with the artificial atmosphere switch, and its input end is connected with the second channel (222) of described three-way solenoid valve by pipeline, and output terminal is communicated with described switch board (20) by pipeline;
Overvoltage protection valve (27) is located at the top of described switch board (20), and the one end is communicated with switch board (20), and the other end leads to atmosphere;
Eddy current refrigeratory (26), be located at the top of switch board (20), its air input end leads to (223) by the third channel that pipeline connects described three-way solenoid valve, and the cold air output terminal of its bottom is communicated with switch board (20), and the hot-air output terminal at top is communicated with atmosphere;
Thermal resistance (25) is temperature sensor, and its thermometric end places in the switch board (20);
Temperature controller (24), its signal input part connects the signal output part of described thermal resistance (25) by wire, and its signal output part connects the power control terminal of described three-way solenoid valve (22) by wire.
2. the constant temperature positive pressure protection system of switch board as claimed in claim 1 is characterized in that:
The model that described eddy current refrigeratory (26) adopts is: EXAIR 3215.
3. the constant temperature positive pressure protection system of switch board as claimed in claim 1 is characterized in that:
The model that described temperature controller (24) adopts is: KBOLD TDD-1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220311198 CN202735875U (en) | 2012-06-29 | 2012-06-29 | Constant temperature positive pressure protection system of control cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220311198 CN202735875U (en) | 2012-06-29 | 2012-06-29 | Constant temperature positive pressure protection system of control cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202735875U true CN202735875U (en) | 2013-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220311198 Expired - Lifetime CN202735875U (en) | 2012-06-29 | 2012-06-29 | Constant temperature positive pressure protection system of control cabinet |
Country Status (1)
| Country | Link |
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| CN (1) | CN202735875U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197731A (en) * | 2014-09-15 | 2014-12-10 | 常州宝仪机电设备有限公司 | Control cabinet of explosion-proof kiln |
| CN104821057A (en) * | 2015-05-20 | 2015-08-05 | 大庆宏富来电气设备制造有限公司 | Explosion-proof control box |
| CN105807819A (en) * | 2014-12-31 | 2016-07-27 | 长春北方化工灌装设备有限公司 | High-capacity, explosion-proof and positive-pressure cabinet having self-cooling function |
| CN106313121A (en) * | 2016-10-11 | 2017-01-11 | 北京工业大学 | Explosion-proof industrial robot based on integral gastight channel |
| CN111818762A (en) * | 2020-07-16 | 2020-10-23 | 四机赛瓦石油钻采设备有限公司 | Explosion-proof converter of intelligence malleation |
| CN114800464A (en) * | 2022-04-29 | 2022-07-29 | 深圳市大族机器人有限公司 | Explosion-proof type cooperative robot and explosion-proof method thereof |
-
2012
- 2012-06-29 CN CN 201220311198 patent/CN202735875U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197731A (en) * | 2014-09-15 | 2014-12-10 | 常州宝仪机电设备有限公司 | Control cabinet of explosion-proof kiln |
| CN105807819A (en) * | 2014-12-31 | 2016-07-27 | 长春北方化工灌装设备有限公司 | High-capacity, explosion-proof and positive-pressure cabinet having self-cooling function |
| CN104821057A (en) * | 2015-05-20 | 2015-08-05 | 大庆宏富来电气设备制造有限公司 | Explosion-proof control box |
| CN104821057B (en) * | 2015-05-20 | 2017-12-19 | 大庆宏富来电气设备制造有限公司 | Explosion-proof control box |
| CN106313121A (en) * | 2016-10-11 | 2017-01-11 | 北京工业大学 | Explosion-proof industrial robot based on integral gastight channel |
| CN111818762A (en) * | 2020-07-16 | 2020-10-23 | 四机赛瓦石油钻采设备有限公司 | Explosion-proof converter of intelligence malleation |
| CN114800464A (en) * | 2022-04-29 | 2022-07-29 | 深圳市大族机器人有限公司 | Explosion-proof type cooperative robot and explosion-proof method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Weisan Road Chemical Office Building, Baoshan District, Shanghai, 2004 Patentee after: BAOWU CARBON MATERIAL TECHNOLOGY Co.,Ltd. Address before: No. 3501 Tongji Road, Baoshan District, Shanghai 201900 Patentee before: Shanghai Baosteel Chemical Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |
|
| CX01 | Expiry of patent term |