Summary of the invention
The purpose of the utility model is to provide a kind of absorption type dryer noise reduction gas extraction system.
In order to overcome the above problems, the utility model is to realize through following technical scheme.
A kind of absorption drier noise reduction gas extraction system comprises pressure transmitter, PLC controller, muffler, necessary connection pipeline, valve;
Said pressure transmitter is used to detect noise reduction gas exhaust piping pressure signal;
Said PLC controller is used for the output signal of pressure transmitter is handled and computing, obtains force value;
Said connecting line and valve are used for the emptying of two absorption cylindrical shells is automaticallyed switch;
Said muffler is used for the emptying of absorption cylindrical shell is reduced noise.
As a kind of improvement, also comprise display unit, said display unit links to each other with the PLC controller.
As a kind of improvement, also comprise guidance panel, said guidance panel links to each other with the PLC controller, is used to import data and programming.
As a kind of improvement, described display unit is a LCD display.
Compared with prior art, the beneficial effect of the utility model is:
Adopt the detection of the utility model to the noise reduction gas exhaust piping pressure of absorption type dryer; In case guaranteeing that drain tap is undesired closes; The pressure medium of drying system can not reduce; And in running, can in time make reflection to the gas exhaust piping variation of gas pressure, so that in the shortest time, fault is got rid of, make in the production process bleed pressure more stable.
The specific embodiment
In conjunction with accompanying drawing, be elaborated in the face of the utility model down.
A kind of absorption type dryer noise reduction gas extraction system in this specific embodiment comprises pressure transmitter, PLC controller, muffler, necessary connection pipeline, valve.
Pressure transmitter connects the noise reduction gas exhaust piping, and the PLC controller connects pressure transmitter, and the PLC controller also connects display unit, guidance panel respectively; Display unit is a LCD display.Said connecting line and valve are used for the emptying of two absorption cylindrical shells is automaticallyed switch.
In this specific embodiment, the PLC controller has been selected Siemens S7-200 series CPU224PLC for use, and the PLC controller has following advantage:
1, real-time
L is controlled to be prerequisite because controller product design and exploitation are based on, and signal processing time is short, and speed is fast.
L is based on the speed of signal processing and program running, and PLC is through being usually used in handling the security interlocking protection of industrial control device.
L more can satisfy each big field large, medium and small type Industry Control project.
2, high reliability
The all I/O input/output signals of l all adopt photoelectricity to isolate, and electricly between the external circuit that makes industry spot and the controller internal circuit go up isolation.
Each input of l all adopts shielding measure, to prevent noise.
L adopts the Switching Power Supply of function admirable.
The components and parts that l just adopts carry out strict screening.
The autodiagnosis function that l is good, in case power supply or other soft, hardware generation abnormal conditions, CPU adopts an effective measure immediately, enlarges to prevent fault.
The big type controller of l can also adopt by two CPU and constitute redundant system or have three CPU to constitute voting system, and realizes that power module is redundant, the IO module redundancy, and reliability is further improved.
3, system configuration simple and flexible
L controller product category is various, and it is large, medium and small etc. that scale can be divided.
L I/O fastener kind is abundant, can be different according to the functional requirement of automatic control Project Realization, and carry out the difference configuration.
L satisfies under the Control Engineering needs prerequisite, but I/O fastener flexible combination.
4, the I/O fastener that enriches
The l controller is directed against the on-site signal of different industrial automatic control engineerings, as: exchange or direct current; Switching value or analog quantity; Voltage or electric current; Pulse or current potential; Forceful electric power or light current etc. have the device or the equipment of corresponding I/O module and industry spot, as: button, travel switch, directly connect near switch, sensor and transmitter, solenoid, control valve etc.
For operating characteristics is provided, it also has multiple interactive interface module to l in addition, and in order to form industrial localized network, it also has the interface module of multiple communication networking, waits for.
5, control system adopts modular construction
L is in order to adapt to various Industry Control needs, and except modular small controller, most controllers adopt modular construction.Each parts of controller comprise that CPU, voltage, I/O etc. all adopt modularized design, by frame and cable each module are coupled together, and the scale of system and function can make up according to user's needs voluntarily.
6, price advantage
The l super quality and competitive price, cost performance is high.
7, install simply, easy to maintenance
L can directly move under various industrial environments, only needs during use the various device at scene is connected with the corresponding I/O end of PLC controller, can put into operation.Operation and accident indicator are all arranged on the various modules, be convenient to the user and understand ruuning situation and search fault.
L adopts modular construction, in case certain module breaks down, the user can resume operation system rapidly through the method for better module.
The PLC controller is realized attainable function: logic control, timing controlled, counting control, sequential control, PID control, data computation, communication and networking.Other also have many special functional modules, as: positioning control module, CRT module.
The pressure transmitter that detects noise reduction gas exhaust piping pressure in this specific embodiment adopts Japanese Henghe Electric Co., Ltd product; This pressure transmitter adopts the resonance beam of microelectronic processing technique (MEMS) in surperficial two shapes of center and peripheral making of a silicon single crystal wafer, size, the on all four H shape of material, and resonance beam is made the higher-order of oscillation in the self-oscillation loop.When the pressure that the upper and lower surfaces of monocrystalline silicon piece receives does not wait, will produce deformation, and cause the center resonance beam to reduce because of the compression stress frequency, edge resonance increases because of receiving the tensile force frequency.The difference signal of two frequencies is directly delivered to CPU and is carried out data, and (1) converts 4-20mA output signal, stack Brain or Hart data signal during communication to through D/A then; (2) directly output meets fieldbus (Fieldbus Foundation TM) standard digital signals.This transmitter is stable, reliable, and precision can reach (± 0.075%).
The guidance panel of control system adopts LCD display to link to each other with PLC; Running status, the open and-shut mode of each valve and the pressure of discharge duct of real-time display device; And various fault detail promptings; Also can be through the keyboard that carries of LCD display, after the correct password of input is obtained authority, make things convenient for to such an extent that revise the operational factor of equipment.
Specific embodiment described herein only is that the present invention's spirit is illustrated.Person of ordinary skill in the field of the present invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.