CN202155931U - Constant pressure control device of hot oil of continuous pressure machine - Google Patents
Constant pressure control device of hot oil of continuous pressure machine Download PDFInfo
- Publication number
- CN202155931U CN202155931U CN2011202504921U CN201120250492U CN202155931U CN 202155931 U CN202155931 U CN 202155931U CN 2011202504921 U CN2011202504921 U CN 2011202504921U CN 201120250492 U CN201120250492 U CN 201120250492U CN 202155931 U CN202155931 U CN 202155931U
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- control valve
- electric control
- control device
- pressure
- differential pressure
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Abstract
The utility model discloses a constant pressure control device of hot oil of a continuous pressure machine. The tail parts of an oil inlet header pipe and an oil return header pipe are connected by an electric control valve capable of controlling opening degrees; a differential pressure controller is connected at two ends of the electric control valve and detects differential pressure signals which are sent to a PLC (Programmable Logic Controller) of an electrical control center; and the PLC compares a detected value with a set value and then controls the electric control valve to act according to a program, thereby realizing the constant pressure control on the oil inlet and outline header pipe. As the pressure of an oil inlet and outlet header pipeline is basically constant, when adjusting flow by each group of circulation unit of the continuous pressure machine, the pressure change generated correspondingly is adjusted by the electric control valve at the tail part, and other circulation units connected in parallel are not influenced basically. The constant pressure control device solves the problem of independent temperature control of the heating circulation units of a two-way adjusting valve of the continuous pressure machine as well as the problem of heating fluctuation of a balance boiler, and meeting the demands of precise temperature control of hot-press panels.
Description
Technical field
The utility model relates to wood-based plate continuous press equipment technical field, particularly relates to a kind of constant voltage control device of continuous press deep fat.
Background technology
In wood-based plate 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 heating platen absorbed heat, the low temperature oil return of discharge was also got back on the same oil return pipe, sends back to the boiler room at last and goes to reheat circulation.Owing to adopt two logical control valves 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 duty 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 heating platen.
The utility model content
The deep fat constant voltage control device of a kind of continuous press that the utility model technical problem to be solved is to propose to the deficiency of above-mentioned prior art; This device solves the problem of five groups of wood-based plate continuous press parallel connection cycling element independence temperature controls; 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 heating platen.Satisfy the needs of hot-pressed board accurate temperature controlling.
The technical problem that the utility model requires to solve can realize through following technical scheme:
A kind of constant voltage control device of continuous press deep fat; 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 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 technical scheme; The utility model compared with prior art; Have following characteristics: solved the problem of five groups of parallel connections of wood-based plate 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 heating platen.Satisfy the needs of hot-pressed board accurate temperature controlling.
Description of drawings
Fig. 1 is the utility model structural representation.
The specific embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand understanding with effect, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1; The constant voltage control device of a kind of continuous press deep fat of the utility model; 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 flowline 5 respectively through elbow 31, elbow 32, and total oil inlet pipe 4 is connected differential pressure controller 2 with total 5 of flowlines, 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 flowline 5 and differential pressure controller 2, total oil inlet pipe 4 and total 5 of flowlines 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 of PLC controller then, realizes the oily house steward's of turnover constant voltage control.
When system's operate as normal, 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 pressure variation meeting that causes is regulated through the electric control valve 1 of afterbody, other parallelly connected cycling elements is not had influence basically, therefore; The utility model has solved the problem that continuous press two logical control valve heat cycles unit independence temperature controls and balance boiler add heat fluctuation, satisfies the needs of hot-pressed board accurate temperature controlling.
More than show and described the advantage of basic principle, principal character and the utility model of the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; The utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection domain to be defined by appending claims and equivalent thereof.
Claims (3)
1. the constant voltage control device of a continuous press deep fat; 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 of said PLC controller.
2. the constant voltage control device of a kind of continuous press deep fat 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 constant voltage control device of continuous press deep fat 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 |
|---|---|---|---|
| CN2011202504921U CN202155931U (en) | 2011-07-15 | 2011-07-15 | Constant pressure control device of hot oil of continuous pressure machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202504921U CN202155931U (en) | 2011-07-15 | 2011-07-15 | Constant pressure control device of hot oil of continuous pressure machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202155931U true CN202155931U (en) | 2012-03-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202504921U Expired - Fee Related CN202155931U (en) | 2011-07-15 | 2011-07-15 | Constant pressure control device of hot oil of continuous pressure machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202155931U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322569A (en) * | 2011-07-15 | 2012-01-18 | 上海恒纽科技发展有限公司 | Constant pressure control system for hot-oil secondary circulation oil inlet and outlet main pipe of continuous press |
-
2011
- 2011-07-15 CN CN2011202504921U patent/CN202155931U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322569A (en) * | 2011-07-15 | 2012-01-18 | 上海恒纽科技发展有限公司 | Constant pressure control system for hot-oil secondary circulation oil inlet and outlet main pipe of continuous press |
| CN102322569B (en) * | 2011-07-15 | 2013-10-16 | 上海恒纽科技发展有限公司 | Constant pressure control system for hot-oil secondary circulation oil inlet and outlet main pipe of continuous press |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120307 Termination date: 20140715 |
|
| EXPY | Termination of patent right or utility model |