CN201719956U - Compressed air dew point precision control device - Google Patents
Compressed air dew point precision control device Download PDFInfo
- Publication number
- CN201719956U CN201719956U CN2010202411299U CN201020241129U CN201719956U CN 201719956 U CN201719956 U CN 201719956U CN 2010202411299 U CN2010202411299 U CN 2010202411299U CN 201020241129 U CN201020241129 U CN 201020241129U CN 201719956 U CN201719956 U CN 201719956U
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- Prior art keywords
- dew point
- compressed air
- control device
- output
- plc
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- 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.)
- Expired - Lifetime
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- 238000010521 absorption reaction Methods 0.000 abstract description 11
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000007664 blowing Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Drying Of Gases (AREA)
Abstract
The utility model discloses a compressed air dew point precision control device which comprises a compressed air dew point detection sensor; the output end of the dew point detection sensor is connected with an A/D conversion unit; the output end of the A/D conversion unit is connected with an operation comparison unit; the output end of the operation comparison unit is connected with a PLC; and the output control signals of the PLC are respectively connected with a connection control valve. The device plays a real control role in the dew points of compressed air, prevents the blind back blowing of an absorption dryer and the frequency switching of work, and saves the waste of a lot of compressed air.
Description
Technical field
The utility model belongs to the compressed air control technology, is specifically related to a kind of compressed air dew point precision control device.
Background technology
Need use compressed-air actuated industry at automobile and other, all be useful on the absorption type device that improves the compressed air dew point.Existing absorption type device work control mode is: transfer the work of B tower to after A tower work a period of time (a few minutes) of absorption type device, the blowback of A tower; Go back to again after B tower work a period of time (a few minutes) and be the work of A tower, the blowback of B tower; So move in circles.
This working method of carrying out A-B tower switch operating, blowback by regular time exists the following shortcoming:
1, the compressed air waste is huge; Because the time interval of each blowback is shorter, the blowback number of times is more, will waste a large amount of compressed air during blowback.
2, can not play the order ground of control compressed air dew point precision; Because production task is unbalanced, compressed-air actuated use amount is not unalterable, and it also is unbalanced that therefore compressed-air actuated humidity changes; So, carry out blowback with regular time, not only can cause compressed-air actuated a large amount of waste; And compressed-air actuated sometimes dew point do not go up, and do not need blowback, and the compressed air dew point is very high sometimes, does not also have blowback, and the equipment that causes some that dew point is had relatively high expectations causes damage.
Summary of the invention
The purpose of this utility model is to provide a kind of absorption type device A-B tower of realizing to change the compressed air dew point precision control device that comes switch operating, blowback according to the compressed air dew point, to address the above problem.
The technical solution of the utility model is: compressed air dew point precision control device, it comprises compressed-air actuated dew point detecting sensor, the output of dew point detecting sensor connects the A/D converting unit, the output concatenation operation comparing unit of A/D converting unit, the output of computing comparing unit connects PLC, and the output control signal of PLC connects control valve respectively.
The use of this control device to compressed-air actuated dew point, has been played real control order ground, has avoided the blindness blowback of absorption drier and the frequent switching of work, except that having saved a large amount of compressed-air actuated wastes, also has following advantages:
1, guaranteed the operate as normal of the equipment (as: robot) higher in the workshop to the source of the gas quality requirement.
2, significantly reduce the frequency of the noise of uttering long and high-pitched sounds (noise is up to more than 90 decibels) between compressed air absorption, made things convenient for the maintenance of service worker equipment.
3,, thereby prolonged the service life of back-flushing valve and operating valve owing to reduced the blowback frequency of absorption drier.Also prolonged the service life of adsorbed film group.
Description of drawings
Fig. 1 compressed air dew point precision control device principle schematic.
Fig. 2 compressed air dew point precision control device circuit diagram.
The specific embodiment
As shown in Figure 2, compressed-air actuated dew point detecting sensor adopts the dew point hygrometer 21 of U.S. GE company, and PLC adopts the PLC of FX1S-14MR model; A/D converting unit and computing comparing unit are included in the XST/D-F11 type digital displaying meter 27 of sky, the Kunlun, Beijing occasion instrument Science and Technology Ltd..The output of XST/D-F11 type digital displaying meter connects the PLC of (terminal 3,4) FX1S-14MR model, and the output of XST/D-F11 type digital displaying meter (terminal 7) also is connected with motor siren 22.The output of PLC connects working electromagnet valve 23 and the blowback magnetic valve 24 on the A tower pipeline on the absorption type device respectively; With working electromagnet valve 25 and the blowback magnetic valve 26 on the B tower pipeline on the absorption type device.XST/D-F11 type digital displaying meter not only can be used as the signal input sources of PLC, can also show the compressed air dew point value of coherent detection.
The operation principle of this device as shown in Figure 1, compressed-air actuated dew point detecting sensor detects on-the-spot compressed-air actuated dew point, dew point value is with the signal input A/D converting unit of 4-20mA, export to the computing comparing unit after the A/D conversion conversion, after the computing of computing comparing unit reaches and sets value relatively, signal to control PLC, PLC is through corresponding blowback of computing rear drive and operating valve, make absorption drier in certain dew point scope, carry out work, to reach control compressed air dew point precision, the order ground of energy savings.When compressed-air actuated dew point was too high, motor siren 2 was reported to the police.
Claims (3)
1. compressed air dew point precision control device, it comprises compressed-air actuated dew point detecting sensor, the output that it is characterized in that the dew point detecting sensor connects the A/D converting unit, the output concatenation operation comparing unit of A/D converting unit, the output of computing comparing unit connects PLC, and the output control signal of PLC connects control valve respectively.
2. compressed air dew point precision control device according to claim 1 is characterized in that A/D converting unit and computing comparing unit are included in the XST/D-F11 type digital displaying meter.
3. compressed air dew point precision control device according to claim 1 is characterized in that the output of XST/D-F11 type digital displaying meter also is connected with motor siren.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202411299U CN201719956U (en) | 2010-06-22 | 2010-06-22 | Compressed air dew point precision control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202411299U CN201719956U (en) | 2010-06-22 | 2010-06-22 | Compressed air dew point precision control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201719956U true CN201719956U (en) | 2011-01-26 |
Family
ID=43488230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202411299U Expired - Lifetime CN201719956U (en) | 2010-06-22 | 2010-06-22 | Compressed air dew point precision control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201719956U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108195883A (en) * | 2018-03-30 | 2018-06-22 | 长沙格力暖通制冷设备有限公司 | Dew point online detection method and device |
| CN108993104A (en) * | 2018-10-08 | 2018-12-14 | 贝克欧净化科技南通有限公司 | A kind of drying guard system that dew point is controllable |
-
2010
- 2010-06-22 CN CN2010202411299U patent/CN201719956U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108195883A (en) * | 2018-03-30 | 2018-06-22 | 长沙格力暖通制冷设备有限公司 | Dew point online detection method and device |
| CN108993104A (en) * | 2018-10-08 | 2018-12-14 | 贝克欧净化科技南通有限公司 | A kind of drying guard system that dew point is controllable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110126 |
|
| CX01 | Expiry of patent term |