CN201350389Y

CN201350389Y - Controller for combined dryer

Info

Publication number: CN201350389Y
Application number: CNU2008202052797U
Authority: CN
Inventors: 王合洲
Original assignee: GUANGZHOU HANYUE PURIFYING TECHNOLOGY Co Ltd
Current assignee: GUANGZHOU HANYUE PURIFYING TECHNOLOGY Co Ltd
Priority date: 2008-12-15
Filing date: 2008-12-15
Publication date: 2009-11-25
Anticipated expiration: 2018-12-15

Abstract

The utility model discloses a controller for a combined dryer, comprising a programmable controller, an analog signal conversion module, a small man-machine interface, a communication module, an AC contactor, a relay, and the like. The controller for a combined dryer is characterized in that the programmable controller is used as a control host, and the small man-machine interface is used to set working parameters and monitor and control the operation status of a cold-dry machine and a micro-heat adsorption dryer. With stable performance and wide range of use, the controller for a combined dryer can easily achieve the automatic control and the dew point energy saving control of a combined dryer. The system has high refrigerant pressure, low refrigerant pressure, compressor overloading, phase sequence protection, over-temperature alarm and low-pressure alarm and shutdown function, and the switching function for start between a tower A and a tower B can be achieved by remote / local control. The cold-dry machine and the micro-heat adsorption dryer can be started independently for operation and can easily achieve the host machine communication. The controller for a combined dryer can improve the performance of the existing compressed air combination dryer, and has the advantages of energy saving, simple structure, low cost, and the like.

Description

Combination type drying machines controller

Technical field

The utility model relates to compressed air purification techniques field, especially a kind of controller of combination type drying machines.

Background technology

Industry is to rise gradually and develop industry faster in China in recent years, under the situation of global available resources growing tension, utilize compressed air as power source general be applied in all trades and professions.Various compressed air purifiers also occur in succession, for combination type drying machines, the control system of at present domestic combination type drying machines all adopts traditional relay or Single-chip Controlling, and this kind control system exists many shortcomings when using in combination type drying machines:

1, function imperfection: present domestic compressed air combination type drying machines singlechip controller, do not possess communication function, warning function, remote control function, just have only and control function on the spot, the combination type drying machines singlechip controller does not satisfy needs far away in modern industry automation control, and the indirect compressed air combination type drying machines production firm that gives brings certain puzzlement.Because singlechip controller does not improve communication function, warning function, remote control function.Compressed air absorption drier production firm has only tailor-made especially, tailor-made long, the high situation of price of time occurs.

2, maintenance capacity is big: because compressed air combination type drying machines singlechip controller, no matter which electronic component has problem all must keep in repair, and because China all uses singlechip controller at combination type drying machines at present, this singlechip controller exist anti-ly do a little less than ability, stability is poor, the easily bad situation of I/O input and output and processor CPU is quite serious, so cause also suitable big of the maintenance capacity of singlechip controller.

3, maintenance cost height: because part compressed air combination type drying machines production firm, do not possess the maintenance condition, so the The whole control case have to be sent back to manufacturer's maintenance, beaming back after maintenance is good, go again to install, so just formed maintenance time long, maintenance cost is high, has brought bad negative effect also for compressed air combination type drying machines production firm.

The utility model content

In order to overcome problems and the shortcoming that present domestic combined compressed air drying machine control system exists, the utility model provides a kind of reliability height, controller simple in structure.

The technical scheme that its technical problem that solves the utility model adopts is: this combination type drying machines controller comprises Programmable Logic Controller, be connected with an analog signal conversion module and a miniature man-machine interface on the Programmable Logic Controller, the analog signals input port of analog signal conversion module links to each other with finished product gas dew-point temperature transmitter, heter temperature transmitter, cooling driers dew-point temperature transmitter respectively; First to the 3rd input port of Programmable Logic Controller links to each other with the low-voltage contact of pressure switch, high and low voltage switch, the high-voltage contact of high and low voltage switch respectively; First to the 7th control delivery outlet of Programmable Logic Controller links to each other with first relay to the, seven relays respectively; The normally opened contact of first relay to the, seven relays links to each other with first control cylinder, second control cylinder, first A.C. contactor, second A.C. contactor, 30% load/unload valve, 60% load/unload valve, 90% load/unload valve respectively; The normally-closed contact of described first A.C. contactor links to each other with heater, and the main contacts of first A.C. contactor links to each other with compressor; Described Programmable Logic Controller is built-in with a program controling module.

The main contacts of described second A.C. contactor links to each other with the compressor heater.

Also be in series with overload protective device and overheat protector between the main contacts of described first A.C. contactor and the compressor; On the main contacts of first, second A.C. contactor, be parallel with a phase sequence relay; The control contact of overheat protector, the control contact of phase sequence relay link to each other with the 4th to the 6th input port of described Programmable Logic Controller respectively.

The the 7th to the 9th input port of described Programmable Logic Controller respectively with remote activation control relay normally opened contact, long-rangely stop the control relay normally opened contact, change-over switch links to each other, and the remote activation control relay, long-rangely stops to be connected with on the control relay remote activation button, long-range stop button.

Also be connected with a communication module on the described Programmable Logic Controller.

The the 8th, the 9th control delivery outlet of described Programmable Logic Controller is connected with operation display lamp, fault display lamp respectively.

The beneficial effects of the utility model are: distribution is simple, and the version compactness is attractive in appearance; Maintenance cost is very little, and manufacturing expense is low; The Ethernet networking is easy to operate, the reliability height, and antijamming capability is strong; Comprehensive, perfect in shape and function, applicability is strong; Disposed the analog signal conversion module at the combination type drying machines drier controller, make combination type drying machines controller more accurate in analog quantity, closed-loop control to analog quantitys such as temperature, pressure, flows, adopt the PID closed-loop control, dew-point temperature is accurate, energy-saving effect is obvious, and is simple to operation etc.

Description of drawings

Fig. 1 is the combination type drying machines structural representation with the utility model control;

Fig. 2 is the schematic diagram of Programmable Logic Controller of the present utility model;

Fig. 3 is the control principle figure that is controlled by the executing agency of Fig. 2 Programmable Logic Controller;

Fig. 4 is the structure chart of four unification combination valves.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

As Fig. 1, Fig. 2 and shown in Figure 3, combination type drying machines controller Programmable Logic Controller 24, Programmable Logic Controller 24 are connected with an analog signal conversion module 25 and a miniature man-machine interface 26, and the analog signals input port of analog signal conversion module 25 links to each other with finished product gas dew-point temperature transmitter DT1, heter temperature transmitter TT1, cooling driers dew-point temperature transmitter TT2 respectively; First to the 9th input port of Programmable Logic Controller 24 links to each other with low-voltage contact 61, the high-voltage contact 62 of high and low voltage switch 6, overload protective device normally opened contact FR-1, the control contact R J-1 of overheat protector, control contact XJ-1, the remote activation relay K A9-1 of phase sequence relay, long-range slew relay KA10-1, the change-over switch SA1 of pressure switch 10, high and low voltage switch 6 respectively; First to the 7th control delivery outlet of Programmable Logic Controller links to each other with the first relay K A1 to the, seven relay K A7 respectively; Eight, the 9th control delivery outlet is connected with operation display lamp HL1, fault display lamp HL2 respectively; The normally opened contact KA7-1 of normally opened contact KA1-1 to the seven relay K A7 of the first relay K A1 links to each other with first control cylinder 122, second control cylinder 125, the first A.C. contactor KM1, the second A.C. contactor KM2,30% load/unload valve 101,60% load/

unload valve

102,90% load/unload valve 103 respectively; The main contacts KM1-1 of the first A.C. contactor KM1, overload protective device FR, overheat protector RJ link to each other with compressor 1 order, the normally-closed contact KM1-2 of the first A.C. contactor KM1 links to each other with heater 13, and the main contacts KM2-1 of the second A.C. contactor KM2 links to each other with the compressor heater; Remote activation button SB1, the long-range SB2 of stopping remote activation control relay KA9, the long-range control relay KA10 that stops to link to each other, and a phase sequence relay XJ in parallel is arranged on main contacts KM1-1, the KM2-1 of first, second A.C. contactor; Described Programmable Logic Controller 24 is built-in with a program controling module, also is connected with a communication module 27 on the Programmable Logic Controller 24.The first power supply AC, second source DC provide AC power, dc source respectively, and circuit breaker Q F1 links to each other with the first power supply AC.

Four unification combination valves comprise upper and lower valve body, first control cylinder 122, the second control cylinder 125, band snubber slide movable valve plug 115, equalizer valve assembly 112,120, it is characterized in that four air chambers 111,117,118,124 all are arranged on down in valve carries as shown in Figure 4, and each air chamber is connected by left tower body, air inlet pipe, right tower body, the silencer of flange 126,116,121,123 with the outside respectively.A band snubber slide movable valve plug 115 is arranged on air chamber 117, under the draught head effect, move the switching that realizes airflow direction to the left or to the right.Equalizer valve assembly 112,120 drops on air chamber 111,118 and air chamber 124 break-makes respectively, and opens or closes the pressurising valve 113,119 in air chamber 111,118 simultaneously, and the pressurising valve is communicated with by pressurising pipe 114.

The basic principle of four unification valves is by the timing break-make between air chamber, forms different gas circuits and produces draught head, makes band snubber slide movable valve plug move left and right, thereby opens or closes corresponding valve, reaches the purpose of automatic switchover.

The low temperature liquid cold-producing medium evaporimeter 8 of flowing through, through flashing to gaseous state, the cold-producing medium of gaseous state enters vaporizer 7 from evaporimeter 8 outlets, treat to enter cold medium compressor 1 air entry after micro-liquid refrigerant is gasified totally within it, cold medium compressor 1 is compressed into the gaseous refrigerant of low temperature the gas of HTHP, by the autoregulation of hot gas bypass valve 2, there is fraction gas directly to enter evaporimeter 8, most gas then enters condenser 3 condensations and cooling.The high pressure low temperature liquid refrigerant that comes out from condenser 3 enters the heating power expansion valve 5 by the throttling step-down by device for drying and filtering 4, becomes low pressure liquid and enters evaporimeter 8, and cooling has entered the compressed air of evaporimeter 8.So, the circulation that goes round and begins again.When high and low voltage switch 6, overheat protector RJ, overload protective device FR, phase sequence relay XJ have the signal input, to handle through Programmable Logic Controller 24, cooling driers is shut down and is reported to the police.Signal according to cooling driers dew-point temperature transmitter TT2 detection, Programmable Logic Controller 24 is according to different unblankings 30% load/unload valve 101,60% load/

unload valve

102 or 90% load/unload valve 103, strengthen cooling water flow, reduce intake air temperature and environment temperature.

Compressed air is through air intake 22, forecooler 21, evaporimeter 8 precoolings, by moisture trap 9 large quantity of moisture is removed, treated compressed air to four unification combination valve 11, at first carry out pressurising, compressed air enters drier A tower absorbing cylinder 14 and drier B tower absorbing cylinder 15 through pressurising pipe 114, after all pressure reached setting value, pressurising this moment process was finished.The work of A tower, the regeneration of B tower, 122 actions of first control cylinder, it is descending to drive equalizer valve assembly 120, and the gas in the B tower enters in the valve and by flange 123 through flange 121 and is discharged in the atmosphere through silencer 12.This moment, band snubber slide movable valve plug 115 moved right, and finishes once and switches under the draught head effect.This moment, the A tower entered working stage, humid air enters in the valve body and from flange 126 from flange 116 continuously and enters the A tower, after the adsorbent drying, most of dry gas is through adsorbent, moisture content in the adsorbent is deviate from, dry compressed air enters forecooler 21 through A tower check-valves 18 and carries out heat exchange with the compressed air that just enters combination type drying machines, dry gas major part from forecooler 21 is passed through through finished product gas outlet 23, there is sub-fraction to pass through from regeneration gas adjustable valve 20, and enter heater 13 intensification backs by B tower regeneration tolerance check valve 17, the drier B tower absorbing cylinder 15 of flowing through, blow away the moisture that is adsorbed, this part regeneration gas is by drier B tower, through the flange 121 of four unification combination valves 11, flange 123, discharge in the silencer 12.After the time that reaches setting, drier A tower, B tower switch operating, i.e. B tower work, the regeneration of A tower, principle is the same, does not just add at this and gives unnecessary details.When pressure leak source temperature transmitter DT1 detected signal when setting-up time reaches is no more than setting value, do not carry out switch operating, when reaching, just switch.When the detected temperature of heter temperature transmitter TT1 equaled to set value, heater stopped heating, did not reach to set value then heater heating.When the pressure of drier A tower or drier B tower was not enough, in pressure switch 10 closures of four unification combination valves, 11 import departments, system all pressed, and adsorbs again after all pressing.

Claims

1, a kind of combination type drying machines controller, it is characterized in that described combination type drying machines controller comprises Programmable Logic Controller (24), be connected with an analog signal conversion module (25) and a miniature man-machine interface (26) on Programmable Logic Controller (24), the analog signals input port of analog signal conversion module (25) links to each other with finished product gas dew-point temperature transmitter (DT1), heter temperature transmitter (TT1), cooling driers dew-point temperature transmitter (TT2) respectively; First to the 3rd input port (X0-X2) of Programmable Logic Controller (24) links to each other with the low-voltage contact (61) of pressure switch (10), high and low voltage switch (6), the high-voltage contact (62) of high and low voltage switch (6) respectively; First to the 7th control delivery outlet (Y0-Y6) of Programmable Logic Controller (24) links to each other with first relay (KA1) to the 7th relay (KA7) respectively; The normally opened contact (KA1-1) of first relay (KA1) to the normally opened contact (KA7-1) of the 7th relay (KA7) links to each other with first control cylinder (122), second control cylinder (125), first A.C. contactor (KM1), second A.C. contactor (KM2), 30% load/unload valve (101), 60% load/unload valve (102), 90% load/unload valve (103) respectively; The normally-closed contact (KM1-2) of described first A.C. contactor (KM1) links to each other with heater (13), and the main contacts (KM1-1) of first A.C. contactor (KM1) links to each other with compressor (1); Described Programmable Logic Controller (24) is built-in with a program controling module.

2, combination type drying machines controller according to claim 1, the main contacts (KM2-1) of described second A.C. contactor (KM2) links to each other with compressor heater (104).

3, combination type drying machines controller according to claim 1 also is in series with overload protective device (FR) and overheat protector (RJ) between the main contacts (KM1-1) of described first A.C. contactor (KM1) and the compressor (1); On the main contacts (KM1-1) of first, second A.C. contactor, (KM2-1), be parallel with a phase sequence relay (XJ); The control contact (RJ-1) of overheat protector (RJ), the control contact (XJ-1) of phase sequence relay (XJ) link to each other with the 4th to the 6th input port (X3-X5) of described Programmable Logic Controller (24) respectively.

4, combination type drying machines controller according to claim 1, the the 7th to the 9th input port (X6-X8) of described Programmable Logic Controller (24) respectively with remote activation control relay (KA9) normally opened contact (KA9-1), long-rangely stop control relay (KA10) normally opened contact (KA10-1), change-over switch (SA1) links to each other, and remote activation control relay (KA9), long-rangely stops to be connected with on the control relay (KA10) remote activation button (SB1), long-range stop button (SB2).

5,, it is characterized in that also being connected with on the described Programmable Logic Controller communication module (27) according to described any combination type drying machines controller of claim 1-4.

6,, it is characterized in that the 8th, the 9th control delivery outlet (Y7, Y8) of described Programmable Logic Controller (24) is connected with operation display lamp (HL1), fault display lamp (HL2) respectively according to described any combination type drying machines controller of claim 1-4.