CN2831201Y - PS edition photosensitizer ultrasonic level control system - Google Patents

Abstract

The utility model relates to a liquid level control system, particularly a PS edition photosensitizer ultrasonic liquid level control system. The utility model solves the technical problems that the liquid level of a liquid storing barrel is constant, and the fluctuation of the delivery volume of photosensitizer is reduced. The utility model comprises the liquid storing barrel, a frequency changer and a metering pump, and is characterized in that the liquid storing barrel is connected with an electric clamp valve by a flexible pipe; the electric clamp valve is connected with a constant level liquid barrel by a flexible pipe; the constant level liquid barrel is provided with an ultrasonic probe connected with a liquid level controller connected with the electric clamp valve; an output flexible pipe of the constant level liquid barrel is connected with the metering pump controlled by the frequency changer. The utility model is mainly used for controlling the transmission of the photosensitizer when printing plate material needs to be added with photosensitive layers.

Description

PS version sensitization liquid ultrasonic solution level controlling system

Technical field: the utility model relates to a kind of tank level control system, particularly a kind of PS version sensitization liquid ultrasonic solution level controlling system.

Background technology: the thickness of photographic layer has very large influence to the performance of plate on the PS version, extremely thin because of basic thickness, only have about 1/1000mm, so in HG/T2694-95 PS version industry standard, stipulated to estimate, required to be controlled at ± 0.05g/m with the weight of every square metre of photosensitive material ²Within, what the conveying of photoresists was adopted usually is the low speed gear pump, its actual conveying capacity is subjected to the height of liquid level in the fluid reservoir to influence bigger, when adopting manual shift, because everyone operating habit difference, how much be difficult to be unified in the scale of a standard on the interpolation liquid measure the opportunity of grasping, when liquid level change more for a long time, can produce bigger pressure to the volume pump input end changes, although the rotating speed of volume pump is by Frequency Converter Control, still can have influence on what of volume pump output liquid amount, cause coating machine resulting photosensitive liquid quantitative change shakiness in the unit interval, directly have influence on space of a whole page coating and change inhomogeneously, influence product quality, and personnel frequently pass in and out application chamber and also can bring adverse effect to product quality.

Summary of the invention: the purpose of this utility model provides a kind of PS version sensitization liquid ultrasonic solution level controlling system that can control automatically sensitization liquid liquid storing barrel liquid level.The technical issues that need to address are: make that the liquid level of liquid storing barrel is constant, reduce the fluctuation of sensitization liquid operational throughput, eliminate final products light sensitive layer thickness fluctuation.The technical solution of the utility model is: PS version sensitization liquid ultrasonic solution level controlling system, comprise liquid storing barrel, frequency converter and volume pump, it is characterized in that, liquid storing barrel connects electronic pinched valve by flexible pipe, electronic pinched valve connects permanent position liquid bucket by flexible pipe, on the liquid bucket of permanent position ultrasonic probe is installed, and ultrasonic probe connects fluid level controller, fluid level controller also connects electronic pinched valve, and permanent position liquid bucket delivery hose connects the volume pump by Frequency Converter Control.

Circuit connecting relation of the present utility model is: AC power L termination isolating switch, the two ends of AC power are connected to pilot lamp HL1, fluid level controller LT input termination AC power, its output terminal meets electronic pinched valve LV and ultrasonic probe LE respectively, direct-flow voltage regulation source input termination AC power, the tight valve of output termination electrical clip, the N end of transformer B input termination AC power and the input port of fluid level controller LT, the tight valve LV of transformer B output termination electrical clip, the electronic pinched valve LV warning lamp of being informed of a case, AC power also connects an ON-OFF control circuit, two groups of switch in parallel, one of them switch serial connection pilot lamp HL2, another switch is connected in series successively with button SB and relay K, button SB two ends switch in parallel is parallel with the switch and the electric bell of serial connection at button SB input end and relay output end.

The beneficial effects of the utility model are: owing to set up permanent position liquid bucket, after by fluid level controller the signal that is arranged on ultrasonic probe transmission on the liquid bucket of permanent position being handled, action by electronic pinched valve, make permanent position liquid bucket feed liquor amount reach balance with using consumption, the liquid level of final permanent position liquid bucket accurately is controlled at ± 1mm in, satisfied the demand of technology fully.Make that the thickness of photographic layer is well controlled on the PS version, improved the quality and the stability of product.The utility model not only has the function of accurate autostable photoresists liquid level, and its course of work possesses following four characteristics: the dynamic quality that does not have overtravel, do not have number of oscillations, shortens transit time and do not have inertia, can effectively improve liquid.The utility model possesses following function: 1, can set the liquid surface lifting of photoresists in liquid storing barrel as required arbitrarily.2, can accurately keep photoresists in liquid storing barrel given liquid level.3, carry photoresists to volume pump with constant pressure.The constant pressure and the constant flow that 4, can keep the photoresists liquid-supplying system.5, ensure the space of a whole page photographic layer thickness uniformity of coating machine coating.

Description of drawings:

Fig. 1 is the utility model system architecture synoptic diagram

Fig. 2 is the utility model circuit theory diagrams

Among the figure: 1-liquid storing barrel, 2, permanent position liquid bucket, 3-ultrasonic probe, 4-fluid level controller, the electronic pinched valve of 5-, 6-frequency converter, 7-volume pump

Embodiment: with reference to Fig. 1,2, PS version sensitization liquid ultrasonic solution level controlling system, comprise liquid storing barrel 1, liquid storing barrel 1 connects electronic pinched valve 5 by flexible pipe, electronic pinched valve is chosen the Shanghai DJJV of San Ji engineering Industrial Co., Ltd. type, electronic pinched valve 5 connects permanent position liquid bucket 2 by flexible pipe, on the permanent position liquid bucket 2 ultrasonic probe 3 is installed, ultrasonic probe is chosen the German P+F UC2000 of company, ultrasonic probe 3 connects fluid level controller 4, fluid level controller is chosen the Japanese PKC REX-D900 of company, and fluid level controller 4 also connects electronic pinched valve 5.Permanent position liquid bucket 2 delivery hoses connect the volume pump 7 by frequency converter 6 controls.

When photoresists liquid level height was in setting value in the liquid bucket 2 of permanent position, ultrasonic probe 3 compared the signal that measures with artificial setting value, because two signal magnitude equate that polarity is opposite, cancel each other, and resultant signal is zero.At this moment, fluid level controller 4 does not have signal output, and total system keeps relative static conditions, electronic pinched valve 5 is in clamped condition, do not have photographic emulsion to flow through in the rubber flexible pipe, photoresists liquid level height can not change in the liquid bucket 2 of permanent position, is in relative static conditions.When carrying out PS version coating photoresists, along with volume pump constantly pumps photographic emulsion, when slight decline takes place in 2 li photoresists liquid levels of permanent position liquid bucket (general setting space displacement accuracy is not more than 0.2 millimeter), high-sensitivity ultrasonic probe 3 becomes electric signal with the space displacement conversion of signals, being transferred to Automation Control Instruments is LT fluid level controller 4, because this signal and setting signal are not of uniform size, polarity is opposite, can not offset fully, resultant signal is non-vanishing.This feeble signal is amplified, switched by fluid level controller 4 through the signal difference of comparing, the output 4-20 milliampere electric current that differs in size is given the control coil of electronic pinched valve 5, it is different that electronic pinched valve 5 is pressed the given big or small releasing degree of electric current, make photographic emulsion can pass through the rubber flexible pipe, the pressure that relies on liquid storing barrel 1 and permanent position liquid bucket 2 natural height differences to form flows into the permanent position liquid bucket 2 that ultrasonic probe 3 is controlled smoothly.

After the liquid level of permanent position liquid bucket 2 returns to setting height gradually, the signal output of ultrasonic probe 3 is also constantly reducing in this process, thereby the fluid flow that makes photoresists also produces a descending process, be equivalent to total system in the whole process of measuring and carrying out, have a negative feedback closed loop loop playing a role.When the photoresists liquid level returned to setting value, electronic pinched valve 5 was moved again, and the rubber flexible pipe is clamped, and stoped photographic emulsion to enter permanent position liquid bucket 2, thereby finished a course of work.For the sake of security, when system's liquid level that makes photoresists that in a single day breaks down surpasses setting value, no matter be to increase or reduce, warning device will be warned, and in time reminds the post personnel to handle.

Claims (2)

1, PS version sensitization liquid ultrasonic solution level controlling system, comprise liquid storing barrel, frequency converter and volume pump, it is characterized in that, liquid storing barrel connects electronic pinched valve by flexible pipe, electronic pinched valve connects permanent position liquid bucket by flexible pipe, on the liquid bucket of permanent position ultrasonic probe is installed, and ultrasonic probe connects fluid level controller, fluid level controller also connects electronic pinched valve, and permanent position liquid bucket delivery hose connects the volume pump by Frequency Converter Control.

2, PS version sensitization liquid ultrasonic solution level controlling system according to claim 1, it is characterized in that: this circuit system structure is: AC power L termination isolating switch, the two ends of AC power are connected to pilot lamp HL1, fluid level controller LT input termination AC power, its output terminal meets electronic pinched valve LV and ultrasonic probe LE respectively, direct-flow voltage regulation source input termination AC power, the tight valve of output termination electrical clip, the N end of transformer B input termination AC power and the input port of fluid level controller LT, the tight valve LV of transformer B output termination electrical clip, the electronic pinched valve LV warning lamp of being informed of a case, AC power also connects an ON-OFF control circuit, two groups of switch in parallel, one of them switch serial connection pilot lamp HL2, another switch is connected in series successively with button SB and relay K, and button SB two ends switch in parallel is parallel with the switch and the electric bell of serial connection at button SB input end and relay output end.