CN102322569A - Constant pressure control system for hot-oil secondary circulation oil inlet and outlet main pipe of continuous press - Google Patents
Constant pressure control system for hot-oil secondary circulation oil inlet and outlet main pipe of continuous press Download PDFInfo
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- CN102322569A CN102322569A CN201110198721A CN201110198721A CN102322569A CN 102322569 A CN102322569 A CN 102322569A CN 201110198721 A CN201110198721 A CN 201110198721A CN 201110198721 A CN201110198721 A CN 201110198721A CN 102322569 A CN102322569 A CN 102322569A
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- 238000010438 heat treatment Methods 0.000 abstract description 10
- 230000001105 regulatory effect Effects 0.000 abstract description 10
- 238000007731 hot pressing Methods 0.000 abstract description 2
- 230000001351 cycling effect Effects 0.000 description 9
- 230000009467 reduction Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000007306 turnover Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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Abstract
The invention discloses a constant pressure control system for a hot-oil secondary circulation oil inlet and outlet main pipe of a continuous press. The tail parts of an oil inlet main pipe and an oil return main pipe are connected through an electric regulating valve with controllable opening; both ends of the electric regulating valve are connected with a differential pressure controller; a differential pressure signal detected by the differential pressure controller is sent to a PLC (Programmable Logic Controller) of an electrical control center; a measured value is compared with a preset value by the PLC; and then the electric regulating valve is controlled to actuate according to a program, so that the constant pressure control of the oil inlet and outlet main pipe is realized. The pressure of an oil inlet and outlet main pipeline is basically constant, so when the flow rate of each group of circulating unit of the continuous press is regulated, the correspondingly caused pressure variation can be regulated by the electric regulating valve at the tail part and basically has no influence on other circulating units which are connected in parallel. The problems of independent temperature control of the heating circulating units of a two-way regulating valve and heating fluctuation of a balancing boiler of the continuous press are solved. The requirement of a hot-pressing board on accurate temperature control is met. The invention provides the constant pressure control system for the hot-oil secondary circulation oil inlet and outlet main pipe of the continuous press.
Description
Technical field
The present invention relates to man-made board continuous press equipment technical field, particularly relate to a kind of control system of invariable pressure that continuous press deep fat secondary cycle passes in and out oily house steward that is used for.
Background technique
In man-made board continuous press production line, the production run of continuous press need be carried out the heating of zones of different to the last lower hot pressing board that reaches more than 30 meters, and temperature control needs five groups of deep fat secondary cycle unit groups respectively to respective regions heating and temperature control for this reason; Every group of cycling element effect is identical, all need suck high temperature heat conductive oil from same heating main, and after hot platen absorbed heat, the low temperature oil return of discharge was also got back on the same return tube, sends back to the boiler room at last and goes to reheat circulation.Owing to adopt two logical modulating valve in every group of cycling element; If the deep fat flow substantially constant among the house steward; When regulating the deep fat flow of one group of unit wherein; Will have influence on the fuel supply flow rate of other unit groups, the situation of these many those mutual interference of looking younger occur, make system can't reach a working state stably fast.Because the temperature behind the boiler heating deep fat has fluctuation, and suppresses the heating process that different sheet material need be different.Therefore; Be necessary to design a kind of device, solve the problem of five groups of parallel connection cycling element independence temperature controls, reduce interference each other; The fluctuation of simultaneously boiler being heated; Also carry out effective balance, let unnecessary deep fat in time reflux, make the fluctuation of boiler heat can not have influence on technology the heating of press hot platen.
Summary of the invention
Technical problem to be solved by this invention is to propose to the deficiency of above-mentioned existing technology a kind ofly is used for the control system of invariable pressure that continuous press deep fat secondary cycle passes in and out oily house steward; This system has solved the problem of five groups of parallel connections of man-made board continuous press cycling element independence temperature control; Reduced interference each other; Simultaneously boiler is added heat fluctuation, also carry out effective balance, make the fluctuation of boiler heat can not have influence on technology the heating of press hot platen.Satisfy the needs of hot-pressed board accurate temperature controlling.
The technical problem that the present invention requires to solve can realize through following technological scheme:
A kind ofly be used for the control system of invariable pressure that continuous press deep fat secondary cycle passes in and out oily house steward; Comprise electric control valve, differential pressure controller and PLC controller; Said electric control valve two ends connect respectively into and out of oily house steward; Said electric control valve two ends also connect the interface of differential pressure controller respectively, and said differential pressure controller is connected with the signal input part signal of said PLC controller, and said electric control valve is connected with the control signal output terminal of said PLC controller.
All be connected with stop valve between the two ends of said differential pressure controller and electric control valve and between oil-feed house steward and fuel-displaced house steward.
Said electric control valve is connected through elbow with the oily house steward of turnover.
Owing to adopted as above technological scheme; The present invention compared with prior art; Have following characteristics: solved the problem of five groups of parallel connections of man-made board continuous press cycling element independence temperature control, reduced interference each other, simultaneously boiler has been added heat fluctuation; Also effectively carry out balance, make the fluctuation of boiler heat can not have influence on technology the heating of press hot platen.Satisfy the needs of hot-pressed board accurate temperature controlling.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, below in conjunction with concrete diagram, further set forth the present invention.
As shown in Figure 1; A kind of control system of invariable pressure that continuous press deep fat secondary cycle passes in and out oily house steward that is used for of the present invention; Comprise electric control valve 1, differential pressure controller 2 and PLC controller; Electric control valve 1 two ends connect total oil inlet pipe 4 and total oil outlet tube 5 respectively through elbow 31, elbow 32, and total oil inlet pipe 4 is connected differential pressure controller 2 with total 5 of oil outlet tubes, is connected with stop valve 61 between an end of total oil inlet pipe 4 and differential pressure controller 2; Be connected with stop valve 62 between the other end of total oil outlet tube 5 and differential pressure controller 2, total oil inlet pipe 4 and total 5 of oil outlet tubes are connected with stop valve 63.
Differential pressure controller 2 is connected with the signal input part signal of PLC controller and is used for detected pressure difference signal is delivered to the PLC controller; The value that the PLC controller will be measured and the value of setting are relatively; Follow procedure goes to control electric control valve 1 action through the control signal output terminal of PLC controller then, realizes the oily house steward's of turnover constant voltage control.
When system's proper functioning, pressure reduction remains on the desirable numerical value of a setting, and is big if pressure reduction becomes; Explain that the boiler incoming oil temperature is higher, five groups of cycling elements are less with oil, need to strengthen the aperture of afterbody electric control valve 1; A part of deep fat is directly refluxed; Unnecessary heat is back to boiler, pressure reduction is descended, get back to desirable pressure difference; If pressure reduction is less than normal, need turn down afterbody electric control valve 1, make five groups of cycling elements of the more entering of deep fat; Less direct backflow if electric control valve 1 cuts out, can't reach rational differential pressure; Explain that the main oil pipe heat supply is not enough, need the notice boiler attendance, improve oily temperature etc.Because total turnover loine pressure substantially constant; So when each group cycling element is regulated flow; The corresponding variation in pressure that causes can be regulated through the electric control valve 1 of afterbody, other parallelly connected cycling elements is not had influence basically, therefore; The invention solves logical modulating valve heat cycles unit independence temperature controls of continuous press two and balance boiler and add the problem of heat fluctuation, satisfy the needs of hot-pressed board accurate temperature controlling.
More than show and described basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification just explains principle of the present invention; The present invention also has various changes and modifications under the prerequisite that does not break away from spirit and scope of the invention, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (3)
1. one kind is used for the control system of invariable pressure that continuous press deep fat secondary cycle passes in and out oily house steward; Comprise electric control valve, differential pressure controller and PLC controller; Said electric control valve two ends connect respectively into and out of oily house steward; Said electric control valve two ends also connect the interface of differential pressure controller respectively, and said differential pressure controller is connected with the signal input part signal of said PLC controller, and said electric control valve is connected with the control signal output terminal of said PLC controller.
2. a kind of control system of invariable pressure that continuous press deep fat secondary cycle passes in and out oily house steward that is used for as claimed in claim 1 is characterized in that, all is connected with stop valve between the two ends of said differential pressure controller and electric control valve and between oil-feed house steward and fuel-displaced house steward.
3. according to claim 1 or claim 2 a kind of is used for the control system of invariable pressure that continuous press deep fat secondary cycle passes in and out oily house steward, it is characterized in that said electric control valve will pass in and out oily house steward through elbow and couple together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110198721 CN102322569B (en) | 2011-07-15 | 2011-07-15 | Constant pressure control system for hot-oil secondary circulation oil inlet and outlet main pipe of continuous press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110198721 CN102322569B (en) | 2011-07-15 | 2011-07-15 | Constant pressure control system for hot-oil secondary circulation oil inlet and outlet main pipe of continuous press |
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| Publication Number | Publication Date |
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| CN102322569A true CN102322569A (en) | 2012-01-18 |
| CN102322569B CN102322569B (en) | 2013-10-16 |
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| CN 201110198721 Active CN102322569B (en) | 2011-07-15 | 2011-07-15 | Constant pressure control system for hot-oil secondary circulation oil inlet and outlet main pipe of continuous press |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341901A (en) * | 2013-07-11 | 2013-10-09 | 福建农林大学 | Artificial board hot-pressing fast constant-temperature control device and method |
| CN104848036A (en) * | 2015-05-14 | 2015-08-19 | 曹显奎 | System for continuously decompressing high pressure fluid containing solid particles |
| CN107388328A (en) * | 2017-08-16 | 2017-11-24 | 北京东方雨虹防水工程有限公司 | The circulatory system and conduction oil heating cycle system |
| CN111928120A (en) * | 2020-07-08 | 2020-11-13 | 南京财经大学 | Rain and sewage pipe network monitoring system |
| CN112776413A (en) * | 2020-12-30 | 2021-05-11 | 济宁科力光电产业有限责任公司 | Position pressure hybrid optimization control method of servo press |
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| CN2857074Y (en) * | 2005-12-23 | 2007-01-10 | 上海连成（集团）有限公司 | Constant pressure water supplying controller controlled by communication |
| CN201189697Y (en) * | 2007-12-28 | 2009-02-04 | 中国铝业股份有限公司 | Heating control apparatus for carbon anode green pressing vibratory compaction mould |
| CN201532337U (en) * | 2009-09-26 | 2010-07-21 | 曾胡 | Full-automatic constant stress controlling means for hydraulic material testing machine |
| CN201780519U (en) * | 2010-07-27 | 2011-03-30 | 沈阳兴大通仪器仪表有限公司 | Device for stabilizing flow rate and pressure of oil and water |
| CN202155931U (en) * | 2011-07-15 | 2012-03-07 | 上海恒纽科技发展有限公司 | Constant pressure control device of hot oil of continuous pressure machine |
-
2011
- 2011-07-15 CN CN 201110198721 patent/CN102322569B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2857074Y (en) * | 2005-12-23 | 2007-01-10 | 上海连成（集团）有限公司 | Constant pressure water supplying controller controlled by communication |
| CN201189697Y (en) * | 2007-12-28 | 2009-02-04 | 中国铝业股份有限公司 | Heating control apparatus for carbon anode green pressing vibratory compaction mould |
| CN201532337U (en) * | 2009-09-26 | 2010-07-21 | 曾胡 | Full-automatic constant stress controlling means for hydraulic material testing machine |
| CN201780519U (en) * | 2010-07-27 | 2011-03-30 | 沈阳兴大通仪器仪表有限公司 | Device for stabilizing flow rate and pressure of oil and water |
| CN202155931U (en) * | 2011-07-15 | 2012-03-07 | 上海恒纽科技发展有限公司 | Constant pressure control device of hot oil of continuous pressure machine |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341901A (en) * | 2013-07-11 | 2013-10-09 | 福建农林大学 | Artificial board hot-pressing fast constant-temperature control device and method |
| CN103341901B (en) * | 2013-07-11 | 2017-11-10 | 福建农林大学 | A kind of wood-based plate hot pressing fast constant-temperaturecontrol control device and method |
| CN104848036A (en) * | 2015-05-14 | 2015-08-19 | 曹显奎 | System for continuously decompressing high pressure fluid containing solid particles |
| CN107388328A (en) * | 2017-08-16 | 2017-11-24 | 北京东方雨虹防水工程有限公司 | The circulatory system and conduction oil heating cycle system |
| CN111928120A (en) * | 2020-07-08 | 2020-11-13 | 南京财经大学 | Rain and sewage pipe network monitoring system |
| CN112776413A (en) * | 2020-12-30 | 2021-05-11 | 济宁科力光电产业有限责任公司 | Position pressure hybrid optimization control method of servo press |
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| CN102322569B (en) | 2013-10-16 |
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Granted publication date: 20131016 |