CN208204992U - A kind of novel boiler pressure monitoring system - Google Patents
A kind of novel boiler pressure monitoring system Download PDFInfo
- Publication number
- CN208204992U CN208204992U CN201820530978.2U CN201820530978U CN208204992U CN 208204992 U CN208204992 U CN 208204992U CN 201820530978 U CN201820530978 U CN 201820530978U CN 208204992 U CN208204992 U CN 208204992U
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- pressure
- boiler
- signal
- converter module
- dcs
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Abstract
The utility model discloses a kind of novel boiler pressure monitoring systems, are made of tri- boiler site pressure detection device, D/A converter module and DCS parts；The pressure checking device passes through short-range signal cable connection D/A converter module, the D/A converter module installation is at the scene, the pressure signal that it concentrates multichannel pressure checking device to send, then conversion output set of number signal is connected in long-range DCS system by MODBUS communication cable.This control system allows producers being remotely monitored boiler pressure using the method for relative moderate, and reduced equipment investment cost has saved the maintenance cost of use process.
Description
Technical field
The present invention relates to boiler, the monitoring system of specifically a kind of boiler pressure.
Background technique
Circulating fluidized-bed combustion boiler needs to guarantee the safety of boiler for producing normal operation and boiler plant to it
Each position of hearth wall carries out pressure detecting, and the air preheater from burner hearth bottom to boiler tail separately designs two pressures from two sides
Power carries out real-time monitoring.Currently used design is a pressure transmitter with one group of two core signal cable, using signal a pair
As soon as mode reach DCS system, that is, several pressure transmitters need several groups of signal cable that signal is transferred to remotely
DCS system.It is such to design the cost for just needing the cost and construction of higher signal cable, it is also increased because route is more
Daily signal fault rate.
D/A converter module may be implemented multichannel analog signals to put together, and conversion digital signal is isolated, passes through RS-
The output of 485 interfaces, with MODBUS agreement, does multiple groups signal concentration of transmissions to long-range DCS system or digital indicator aobvious
Show monitoring.
Modbus agreement is applied to a kind of all-purpose language on electronic controller.By this agreement, controller mutually it
Between, controller can communicate via between network (such as Ethernet) and other equipment.It has become a current industry standard.
There is it, the control equipment of different vendor's production can be linked to be industrial network, carry out Centralized Monitoring.This protocol defines a controls
Device processed can recognize the message structure used, but regardless of them be communicated by which kind of network.It describes a controller
The process of other equipment is requested access to, if responding the request from other equipment, and mistake how is detected and records.It makes
The common format of message field layout and content is determined.When communicating on a Modbus network, this agreement determines each control
Device need know their device address, identify the message sent by address, which kind of action decision will generate.If necessary to return
It answers, controller will generate feedback information and be issued with Modbus agreement.On other networks, the message of Modbus agreement is contained
Be converted to the frame or pack arrangement used over the network.This conversion is also extended according to specific network solution location, road
By path and the method for error detection.
Summary of the invention
The purpose of the utility model is to provide a kind of novel boiler pressure monitoring systems.
The technical solution of the utility model includes: a kind of novel boiler pressure monitoring system, is set by the detection of boiler site pressure
Standby (pressure transmitter), D/A converter module and tri- parts DCS form；Pressure checking device detects boiler pressure, by short
Distance signal cable transmission is to D/A converter module, and at the scene, it concentrates multichannel pressure detecting for the D/A converter module installation
The pressure signal that equipment is sent, then conversion output set of number signal is connected to long-range by MODBUS communication cable
In DCS system.
When the utility model is used, making corresponding operation picture in DCS system, sets system and data acquire
The parameter of A/D conversion module.Using shielded cable DCS interface corresponding with data acquisition A/D conversion module, pass through
MODBUS communications protocol realizes the information exchange of two systems.TC/IP agreement is used between middle control operation computer and DCS system
Signal transmission is carried out, middle control personnel can observe the pressure detection data of boiler on middle control operation screen in real time, to allow
Middle control operator instructs technological operation.
The boiler pressure monitoring system of the utility model changes the communication side of traditional one group of transmission cable of a signal
The multiple pressure signals in scene can be transmitted upper central control system by one group of signal cable by the utility model by formula, allow production
Personnel can monitor simultaneously the signal of multiple groups boiler, so that the cost of investment that the signal cable of DCS system is arrived at scene is reduced, because
Route only has one group, and complicated signal fault rate, has saved maintenance cost due to reduce more than the route.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
In figure: the signal cable of 1- pressure transmitter to D/A converter module；2-MODBUS communication cable；3- Ethernet net
Line.
Specific embodiment
One boiler scene of certain company's thermoelectric device has used more than 60 pressure transmitters to carry out burner hearth, the air compartment of boiler
Detect pressure.Before transformation, every pressure transmitter is independently arranged signal cable and is transferred to DCS system, therefore every boiler needs
Want 60 a plurality of signal cables to lead to the corresponding fastener of DCS, because of complex circuit, fastener channel is more, daily production process exist compared with
High failure rate.
For reality, the said firm is according to the embodiment of the utility model, the 4- of every pressure transmitter at scene
The current signal of the analog quantity of 20mA is concentrated be connected to D/A converter module in order, and sets the matched range ginseng of every analysis
Number, MODBUS communication need D/A converter module parameter is corresponding with DCS, consistent setting both sides' communication format are as follows: RTU, mould
Formula is RS-485, baud rate: 9600bit/s stop position: 1 bit check mode: odd.Picture is operated in the middle control of DCS system
Pressure display box is devised on face, the operation screen that operator just passes through DCS system can remotely monitor boiler pressure, and
When adjust boiler technological operation.
By this design, the complex circuit of solving the problems, such as over, daily trouble shooting judgement is also easier.Change
Process is made because be that D/A converter module only needs a two core shielded cables that more pressure signals are just reached DCS to DCS system,
Therefore signal cable cost of investment it is lower, this design can be used in other instrument fields, he the advantages of be exactly that can solve
The cost of investment of the cable transmitted at a distance, also reduce because complex circuit and caused by signal fault rate.
Claims (1)
1. a kind of novel boiler pressure monitoring system, it is characterized in that: by boiler site pressure detection device, D/A converter module
It is formed with tri- parts DCS；The pressure checking device passes through short-range signal cable connection D/A converter module, the digital-to-analogue
Conversion module is installed at the scene, the pressure signal that it concentrates multichannel pressure checking device to send, then one group of conversion output
Digital signal is connected in long-range DCS system by MODBUS communication cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820530978.2U CN208204992U (en) | 2018-04-16 | 2018-04-16 | A kind of novel boiler pressure monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820530978.2U CN208204992U (en) | 2018-04-16 | 2018-04-16 | A kind of novel boiler pressure monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208204992U true CN208204992U (en) | 2018-12-07 |
Family
ID=64524354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820530978.2U Active CN208204992U (en) | 2018-04-16 | 2018-04-16 | A kind of novel boiler pressure monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208204992U (en) |
-
2018
- 2018-04-16 CN CN201820530978.2U patent/CN208204992U/en active Active
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