CN2808266Y - Ceramic crack on-line detection circuit for filtering machine - Google Patents

Abstract

The utility model discloses a ceramic crack on-line detection circuit for a filtering machine. A circuit of the utility model comprises a vacuum pressure sensor, a digital display controller, a connecting circuit of a coil of a relay KA, a control circuit, an alarm circuit and a main circuit of the filtering machine. The utility model carries out on-line monitoring to vacuum pressure in the filtering machine which is in operation, and signals are transferred to the digital display controller. When the ceramic of the filtering machine are cracked, vacuum degree is below the normal value. The digital display controller sends out alarm and automatically achieves car stop, so that the utility model is protected, and the ability of the production of the filtering machine and the operation rate of the filtering machine are improved.

Description

A kind of filter ceramic fracture is at line detection circuit

Technical field

The utility model relates to a kind of filter ceramic fracture at line detection circuit, is applicable to the filtering means dehydration processing.

Background technology

Filter is the liquid-solid separation equipment of New-generation efficient energy-saving, and its basic principle is analogous to the plain disk filter, and key difference is that it utilizes the capillary capillarity, adopts filter plate of porous ceramic as filter medium.Be in operation, because the situation that ceramic wafer breaks appears in the multiple factor affecting of ceramic wafer quality, the external pressures such as water that wear out and be subjected to recoiling easily.Thereby material enters into filtrate, and contaminated filtrate enters in the chamber of ceramic filter as recoil water again, causes the ceramic wafer micropore to stop up, and ceramic wafer is scrapped.Vacuum sharply descends because ceramic wafer breaks, and the filter production capacity also descends rapidly, and operation rate is low simultaneously, and maintenance load is big, and producing cost significantly raises.Therefore, how in time to find and to handle that the problem that the filter ceramic wafer breaks causes people's attention.

Summary of the invention

The utility model is exactly at the problems referred to above, has proposed a kind of filter ceramic fracture at line detection circuit.

A kind of filter ceramic fracture is characterized in that at line detection circuit this circuit comprises:

A. the output analog signal with vacuum pressure sensor 4mA-20mA shows that with numeral the controller output is connected, numeral shows that the normal opened contact two-terminal of the output of controller is connected with relay K A coil with the L of 220V AC power respectively, the other end of relay K A coil is connected with the N of 220V AC power, and the power supply of numeral demonstration controller is received on the 220V power supply;

B. control circuit is: the contact a.b of change-over switch SA links to each other with direct current+24V power supply mutually and after connecing, the contact C of change-over switch SA is connected in series mutually with an end of the normally closed contact of relay K A, the other end of its normally closed contact is connected in series with normally closed stop button SB one end mutually and after connecing mutually with the contact d of change-over switch SA, the other end of its normally closed contact is connected in series mutually with a normal end of opening moving button ST, its other end and contactor KM coil are in series, the other end of its coil links to each other with the 0V of dc source, the two ends of the normal opened contact of contactor KM respectively with the two ends of the start button ST that often opens mutually and connect;

C. warning circuit is: an end of the normal opened contact of relay K A is connected with the L of 220V AC power, and the other end of its normal opened contact is connected in series mutually with coil one end of alarm DL, and the other end of its coil links to each other with the N of 220V AC power;

D. the main circuit of filter is:

Three-phase alternating current 380V power supply L1, L2, L3 join with three main contacts of contactor KM respectively, and the other end of its three main contacts joins with the motor winding of filter respectively.

Owing to adopted technique scheme, the utility model to avoid filtrate to stop up the ceramic for filtration micropore, after the ceramic for filtration breakage took place, control circuit sent stop sign and reports to the police, thereby had improved the production capacity and the running rate of filter.

Description of drawings

A kind of filter ceramic fracture of Fig. 1 is at line detection circuit control system figure

A kind of filter ceramic fracture of Fig. 2 is at line detection circuit control circuit figure

A kind of filter ceramic fracture of Fig. 3 is at the line detection circuit main circuit diagram

A kind of filter ceramic fracture of Fig. 4 is at line detection circuit warning circuit figure

A kind of filter ceramic fracture of Fig. 5 is at line detection circuit control signal flow diagram

The specific embodiment

A kind of filter ceramic fracture is characterized in that at line detection circuit this circuit comprises:

A. the output analog signal with vacuum pressure sensor 14mA-20mA shows that with numeral controller 2 outputs are connected, numeral shows that the normal opened contact two-terminal of the output of controller is connected with relay K A coil with the L of 220V AC power respectively, the other end of relay K A coil is connected with the N of 220V AC power, and the power supply of numeral demonstration controller is received on the 220V power supply;

B. control circuit is: the contact a.b of change-over switch SA links to each other with direct current+24V power supply mutually and after connecing, the contact C of change-over switch SA is connected in series mutually with an end of the normally closed contact of relay K A, the other end of its normally closed contact is connected in series with normally closed stop button SB one end mutually and after connecing mutually with the contact d of change-over switch SA, the other end of its normally closed contact is connected in series mutually with a normal end of opening moving button ST, its other end and contactor KM coil are in series, the other end of its coil links to each other with the 0V of dc source, the two ends of the normal opened contact of contactor KM respectively with the two ends of the start button ST that often opens mutually and connect;

C. warning circuit is: an end of the normal opened contact of relay K A is connected with the L of 220V AC power, and the other end of its normal opened contact is connected in series mutually with coil one end of alarm DL, and the other end of its coil links to each other with the N of 220V AC power;

D. the main circuit of filter is:

Three-phase alternating current 380V power supply L1, L2, L3 join with three main contacts of contactor KM respectively, and the other end of its three main contacts joins with motor 3 windings of filter respectively.

Numeral shows the parameter setting of controller:

What the utility model adopted is that the WP-XMT series digit shows controller, now major parameter is set and be described: show at PV under the state of measured value, the first alarming value AL 1 is set is-0.085MPa, also can set terminal output as required, under one-level parameter setting pattern, after revising cryptographic parameter CLK=110, under the state of the setting value 110 of PV display password parameters C LK, it is 12 that instrument calibration SL0 is set.Under instrument one-level parameter set condition, after revising cryptographic parameter CLK=132, under the state of the setting value 132 of PV display password parameters C LK, instrument enters secondary parameters and sets, under secondary parameters modification state, whenever press the SET bond parameter and promptly exchange once in order.Secondary parameters is set: set decimal point at kilobit SL1=3; Set the first type of alarm SL2=2, setting measurement lower limit SLL=-0.000; Setting measurement upper limit SLH=-0.010; Other parameter is factory-said value on this device, if run into when showing error, can revise other parameter, specifically can consult this kind of Instrument Note book.After parameter has been set, cryptographic parameter CLK is set at is not equal to other numerical value of 0 or 132, to guarantee parameter safety.

Basic functional principle:

4mA-20mA signal by vacuum pressure sensor imports numeral demonstration controller pressure input terminal into, and numeral shows that controller compares computing to the vacuum pressure analog signals, and numeral shows that the controller working power is an alternating current 220V.

Shutdown process is described

During startup change-over switch SA is beaten to a.c connection position, protection system input at this moment.Because vacuum pressure 0 during the filter starting, numeral shows the output of controller alarm free, disconnects so the KA relay coil disconnects.Press startup knob ST, contactor main contact closure, filter enters running status, the self-locking of KM contactor auxiliary contact.

Observe vacuum pressure to rise to-when 0.085MPa (or setting value) was above, numeral showed that controller sends warning, KA circuit breaker coil protect drops into.

When filter trips because the vacuum pressure sensor vacuum pressure descends, check processing as early as possible, in order to avoid slip emptying in the groove.

Use one:

Used numeral shows controller, an operating filter, and its vacuum alarm settings be-0.09MPa, and when ceramic fracture occurring, vacuum pressure is dropped to-0.09MPa by-0.095MPa, and numeral demonstration controller sends warning behind the 30s.Realize suddenly stopping tripping operation simultaneously and stop filter moving.In running, because the tripping operation that vacuum causes is to realize having crackle and ceramic fragmentation to work to pottery, when being set to halted state (suspend to except that stirring, other equipment all quit work), also continue operation owing to stir, cause broken pottery that good pottery is broken, accident further enlarges, so change this tripping operation into anxious stopping, it is out of service to be that vacuum pressure is lower than when setting value all devices, for avoiding slip deposition in the groove, blowing is carried out in the baiting valve action simultaneously.

Use two:

A filter in service, its vacuum pressure trip value is made as-0.085Mpa, when ceramic fracture occurring, vacuum pressure by-0.094MPa reduce to-during 0.085Mpa, numeral shows that controller sends warning, and 40s reports to the police and do not eliminate, and numeral shows that controller sends cutoff command.

Claims (1)

1. a filter ceramic fracture is characterized in that at line detection circuit this circuit comprises:

A. the output analog signal with vacuum pressure sensor 4mA-20mA shows that with numeral the controller output is connected, numeral shows that the normal opened contact two-terminal of the output of controller is connected with relay K A coil with the L of 220V AC power respectively, the other end of relay K A coil is connected with the N of 220V AC power, and the power supply of numeral demonstration controller is received on the 220V power supply;

B. control circuit is: the contact a.b of change-over switch SA links to each other with direct current+24V power supply mutually and after connecing, the contact C of change-over switch SA is connected in series mutually with an end of the normally closed contact of relay K A, the other end of its normally closed contact is connected in series with normally closed stop button SB one end mutually and after connecing mutually with the contact d of change-over switch SA, the other end of its normally closed contact is connected in series mutually with a normal end of opening moving button ST, its other end and contactor KM coil are in series, the other end of its coil links to each other with the 0V of dc source, the two ends of the normal opened contact of contactor KM respectively with the two ends of the start button ST that often opens mutually and connect;

C. warning circuit is: an end of the normal opened contact of relay K A is connected with the L of 220V AC power, and the other end of its normal opened contact is connected in series mutually with coil one end of alarm DL, and the other end of its coil links to each other with the N of 220V AC power;

D. the main circuit of filter is:

Three-phase alternating current 380V power supply L1, L2, L3 join with three main contacts of contactor KM respectively, and the other end of its three main contacts joins with the motor winding of filter respectively.

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