CN103046616A - Constant-pressure control method for circulating water system - Google Patents
Constant-pressure control method for circulating water system Download PDFInfo
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- CN103046616A CN103046616A CN2012105712291A CN201210571229A CN103046616A CN 103046616 A CN103046616 A CN 103046616A CN 2012105712291 A CN2012105712291 A CN 2012105712291A CN 201210571229 A CN201210571229 A CN 201210571229A CN 103046616 A CN103046616 A CN 103046616A
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- circulating water
- pressure sensor
- pressure
- control method
- water pumps
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- Control Of Positive-Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a constant-pressure control method for a circulating water system. In the constant-pressure control method, a plurality of circulating water pumps with inlet pipelines extending into a circulating water tank are utilized, outlet pipelines of the circulating water pumps are respectively communicated to a water utilizing device, a pressure sensor is arranged on the outlet pipeline of one of the circulating water pumps, measuring signals of the pressure sensor are fed back to a PID (proportion integration differentiation) controller, and output signals of the PID controller are transmitted to motor speed regulating devices of the circulating water pumps through a signal distributor. The PID controller, the pressure sensor and a frequency converter form a closed loop system to control rotation speed of the circulating water pumps and pressure of the circulating water system, pressure value can be accurately controlled, energy source consumption is reduced, work of operators is simplified, and benefits of enterprises are increased. By the aid of the PID controller, the circulating water pumps can be controlled by only one pressure sensor without utilizing independent closed-loop control systems, and cost is saved on the premise of no affection on using.
Description
Technical field
The present invention relates to the industrial control technology field, be specifically related to a kind of constant voltage control.
Background technology
A lot of devices need reclaimed water system in the industrial production, factory need to build reservoir, adopt many high powered water pumps that the recirculated water of enough pressure is provided to device by pipeline, but each device uses recirculated water irregular, when many devices use recirculated water simultaneously, must increase the pressure of recirculated water, and the demand of recirculated water then needs to reduce the pressure of recirculated water when less.Present reclaimed water system is adjusted circulating water pressure by the quantity that opens, stops circulating water pump, and force value is only done step and changed between the integer multiple of separate unit circulating water pump output pressure, can not do accurate control by corresponding required pressure, causes very large energy waste; The variable-frequency governor of circulating water pump has only played reduced-voltage starting when starting mode of pump in addition, does not bring into play the effect of frequency control fully, is a kind of wasting of resources.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of reclaimed water system constant pressure control method, can solve existing reclaimed water system accurately controlled pressure cause the problem of very large energy waste.
The present invention realizes by following scheme:
The reclaimed water system constant pressure control method, comprise that inlet pipeline extends to respectively many circulating water pump in the circulating water pool, the outlet conduit of many circulating water pump is communicated to respectively the water device, wherein the outlet conduit of a circulating water pump is provided with pressure sensor, the measuring-signal of described pressure sensor feeds back to the PID controller, and the output signal of described PID controller is sent to the motor speed control device of many circulating water pump by signal distributor.
The further improvement of the present invention scheme is that motor speed control device is current-mode converter.
The further improvement of the present invention scheme is that signal distributor is distributing switch.
PID controller of the present invention can use PLC programmable logic controller, DCS Distributed Control System etc. with the PID functional module substitute, be to realize easily to those skilled in the art.
The present invention's advantage compared with prior art is:
One, consist of closed-loop system with PID controller, pressure sensor, frequency converter, the rotating speed of controlled circulation water pump is regulated the pressure of reclaimed water system, accurate controlled pressure value, reduce energy consumption, also simplified operating personnel's work, improved the benefit of enterprise;
Two, adopt single PID controller, single pressure sensor to control simultaneously many circulating water pump, do not need every circulating water pump is arranged separately closed-loop control system, under the prerequisite that does not affect result of use, saved cost.
Description of drawings
Fig. 1 is the schematic diagram of reclaimed water system constant pressure control method.
The specific embodiment
Reclaimed water system constant pressure control method as shown in Figure 1, comprise that inlet pipeline extends to respectively the circulating water pump 1 of three 160KW in the circulating water pool 2, the outlet conduit of three circulating water pump 1 is communicated to respectively the water device, wherein the outlet conduit of a circulating water pump 1 is provided with pressure sensor 3, the measuring-signal of described pressure sensor 3 feeds back to PID controller 4, the output signal of described PID controller 4 is sent to the motor speed control device 5 of three circulating water pump 1 by signal distributor 6, described signal distributor 6 is distributing switch, and described motor speed control device 5 is current-mode converter.
Claims (3)
1. reclaimed water system constant pressure control method, comprise that inlet pipeline extends to respectively many circulating water pump (1) in the circulating water pool (2), the outlet conduit of many circulating water pump (1) is communicated to respectively the water device, it is characterized in that: wherein the outlet conduit of a circulating water pump (1) is provided with pressure sensor (3), the measuring-signal of described pressure sensor (3) feeds back to PID controller (4), and the output signal of described PID controller (4) is sent to the motor speed control device (5) of many circulating water pump (1) by signal distributor (6).
2. reclaimed water system constant pressure control method as claimed in claim 1, it is characterized in that: described motor speed control device (5) is current-mode converter.
3. reclaimed water system constant pressure control method as claimed in claim 1, it is characterized in that: described signal distributor (6) is distributing switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105712291A CN103046616A (en) | 2012-12-26 | 2012-12-26 | Constant-pressure control method for circulating water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105712291A CN103046616A (en) | 2012-12-26 | 2012-12-26 | Constant-pressure control method for circulating water system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103046616A true CN103046616A (en) | 2013-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105712291A Pending CN103046616A (en) | 2012-12-26 | 2012-12-26 | Constant-pressure control method for circulating water system |
Country Status (1)
| Country | Link |
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| CN (1) | CN103046616A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108978795A (en) * | 2018-07-25 | 2018-12-11 | 宜宾金石新材料科技有限公司 | A kind of graphitizing furnace furnace end electrode constant pressure water supply system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2042478U (en) * | 1989-02-04 | 1989-08-09 | 牟在洙 | Automatic water supply installation with constant pressure and changeable flow rate |
| JPH10259622A (en) * | 1998-03-10 | 1998-09-29 | Hitachi Ltd | Water supply system direct-connected to city water |
| CN201065544Y (en) * | 2007-02-09 | 2008-05-28 | 铜陵首创水务有限责任公司 | Negative pressure-free continuous frequency conversion water supply installation |
| CN201972199U (en) * | 2011-01-28 | 2011-09-14 | 福建青松股份有限公司 | Automatic constant pressure device in water supply system |
| JP4996953B2 (en) * | 2007-03-26 | 2012-08-08 | テラル株式会社 | Increased pressure water supply system for medium to high-rise buildings |
| CN202416454U (en) * | 2011-12-22 | 2012-09-05 | 宁波侨泰兴纺织有限公司 | Circulating water system for textile technology |
-
2012
- 2012-12-26 CN CN2012105712291A patent/CN103046616A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2042478U (en) * | 1989-02-04 | 1989-08-09 | 牟在洙 | Automatic water supply installation with constant pressure and changeable flow rate |
| JPH10259622A (en) * | 1998-03-10 | 1998-09-29 | Hitachi Ltd | Water supply system direct-connected to city water |
| CN201065544Y (en) * | 2007-02-09 | 2008-05-28 | 铜陵首创水务有限责任公司 | Negative pressure-free continuous frequency conversion water supply installation |
| JP4996953B2 (en) * | 2007-03-26 | 2012-08-08 | テラル株式会社 | Increased pressure water supply system for medium to high-rise buildings |
| CN201972199U (en) * | 2011-01-28 | 2011-09-14 | 福建青松股份有限公司 | Automatic constant pressure device in water supply system |
| CN202416454U (en) * | 2011-12-22 | 2012-09-05 | 宁波侨泰兴纺织有限公司 | Circulating water system for textile technology |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108978795A (en) * | 2018-07-25 | 2018-12-11 | 宜宾金石新材料科技有限公司 | A kind of graphitizing furnace furnace end electrode constant pressure water supply system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130417 |