CN208751663U - An ultrasonic level switch for measuring viscous liquids - Google Patents

Abstract

The utility model relates to an ultrasonic liquid level switch for measuring viscous liquid, comprising a casing, an electronic control device, a transfer sleeve, an extension sleeve, a liquid level probe, a non-stick ring sleeve, a signal line, a transmitting crystal and a receiving crystal; The new model adopts a built-in structure and uses the propagation characteristics of ultrasonic waves in air and liquid to detect the liquid level of the liquid. The measurement results are accurate and effective, the signal transmission distance is short, and the transmission sensitivity is high, effectively avoiding false alarms caused by the adhesion of viscous liquids. The phenomenon occurs, and the structure is simple, the operation is convenient, and the service life is long.

Description

A kind of ultrasonic liquid level switch measuring thick liquid

Technical field

The utility model relates to a kind of ultrasonic liquid level switchs for measuring thick liquid.

Background technique

Currently, the domestic liquid-level switch for viscous medium mainly has floating-ball level switch, Fork LIquid Level Switch, condenser type Liquid-level switch, outer patch ultrasonic liquid level switch.Floating-ball level switch mainly detects the change of liquid level by the oscilaltion of floating ball Change, measuring toughness or when contaminated liquids, floating ball is being be easy to cause to block, generate float float and under slow down phenomenon.Sound Fork liquid-level switch is mainly by the way that the variation of resonant frequency detects the variation of liquid level when media variations between two vibration tuning forks of measurement； For Fork LIquid Level Switch when measuring viscous media, fork body is easy material accumulation between the fork of adhesion together, to generate wrong report It is alert；The variation of capacitor hydraulic switch capacitance by detection liquid level or when bulk cargo height change measures liquid level or material position Highly；The switch body of rod bridging easy to form when measuring viscous medium, to influence the output of analog quantity and generate false alarm；Outside Ultrasonic liquid level switch is pasted, is measured using ultrasonic measurement principle, since the big medium of viscosity can be adhered to hardly possible on tank skin With drippage, caused liquid and without liquid level signal indifference, so can not be just monitored to the liquid level of viscous media, up for into One step is improved.

Utility model content

In view of the above-mentioned state of the art, the technical problem to be solved by the utility model is to provide in a kind of use Formula structure to be set, propagation characteristic of the ultrasonic wave in air and liquid is utilized, measurement result accurate and effective transmits high sensitivity, And structure is simple, easy to operate, the ultrasonic liquid level switch of measurement thick liquid with long service life.

Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of ultrasonic wave for measuring thick liquid Liquid-level switch, including shell, electronic control unit, reducing sleeve, extending sleeve, liquid-level probe, non-sticky ring set, signal wire, transmitting crystalline substance Body and receiving crystal, which is characterized in that the shell is internally provided with electronic control unit, is provided on the downside of the shell Reducing sleeve, the lower end of the reducing sleeve are provided with extending sleeve, and the lower end of the extending sleeve is provided with liquid-level probe；The liquid level is visited It is opened up on the side or end face of head fluted；It is respectively arranged with transmitting crystal inside the two sides opposite face of the groove and receives brilliant Body；The transmitting crystal and receiving crystal pass through signal wire and connect with electronic control unit；The extending sleeve and liquid-level probe It is coated with dismountable non-sticky ring set, is additionally provided with non-sticky coating on the two sides opposite face of the groove.

Further, the interspersed inside by liquid-level probe, extending sleeve and reducing sleeve of the signal wire.

Further, the liquid-level probe is bar shape structure.

Further, it is offered on the non-sticky ring set and the mutually matched notch of groove；The non-sticky coating and notch Mutually splicing.

Compared with the prior art, the advantages of the utility model are: the utility model is using built-in structure and is utilized Propagation characteristic of the ultrasonic wave in air and liquid detects the liquid level of liquid, measurement result accurate and effective and signal transmission distance From short, high sensitivity is transmitted, effectively avoids the generation because thick liquid, which adheres to, leads to false alarm the phenomenon that, and structure is simple, behaviour Facilitate, long service life.

Detailed description of the invention

Fig. 1 is structure chart when liquid-level probe side is arranged in the utility model groove；

Fig. 2 is structure chart when liquid-level probe end face is arranged in the utility model groove.

Specific embodiment

As shown in Fig. 1~2, a kind of ultrasonic liquid level switch measuring thick liquid, including shell 9, electronic control unit 1, reducing sleeve 8, extending sleeve 10, liquid-level probe 2, non-sticky ring set 3, signal wire 5, transmitting crystal 6 and receiving crystal 7；Shell 9 it is interior Portion is provided with electronic control unit 1, and the downside of shell 9 is provided with reducing sleeve 8, and the lower end of reducing sleeve 8 is provided with extending sleeve 10, prolongs The lower end of long set 10 is provided with liquid-level probe 2；Liquid-level probe 2 is bar shape structure；It is opened up on the side or end face of liquid-level probe 2 Fluted 21；Transmitting crystal 6 and receiving crystal 7 are respectively arranged with inside the two sides opposite face of groove 21；Transmitting crystal 6 and reception Crystal 7 is connect by signal wire 5 with electronic control unit 1；Signal wire 5 is interspersed by liquid-level probe 2, extending sleeve 10 and switching The inside of set 8；Extending sleeve 10 and liquid-level probe 2 are coated with dismountable non-sticky ring set 3, offered on non-sticky ring set 3 with it is recessed The mutually matched notch 31 of slot 21；Non-sticky coating 4 is additionally provided on the two sides opposite face of groove 21；Non-sticky coating 4 and notch 31 Mutually splicing；Effect that non-sticky ring set 3 has height non-sticky, preferably protects extending sleeve 10 and liquid-level probe 2 from liquid It contacts and corrodes, extend service life；Non-sticky coating 4 is coated using plasma technology, guarantees liquid-level switch transmission spirit Effect non-sticky with height while quick property and accuracy, the problem of can solve thick liquid bridging, and then guarantee transmitting 7 reliability service of crystal 6 and receiving crystal, not by viscous effects, liquid-level probe 2 issues ultrasound for receiving electronic control unit 1 Wave signal.

In use, the insertion of reducing sleeve 8 is connected to container top, so that shell 9 and electronic control unit 1 are located at container Outside, extending sleeve 10 and liquid-level probe 2 are located at the inside of container and submerge in a liquid, and electronic control unit 1 generates ultrasonic wave And launched outward by transmitting crystal 6, ultrasonic wave is finally passed in receiving crystal 7；The ultrasonic wave that receiving crystal 7 will receive Electronic control unit 1 is fed back to, the ultrasonic signal strength before 1 pair of electronic control unit transmitting and after transmitting compares, with Afterwards according to attenuation variation degree, liquid level value is judged；The principle of ultrasonic measuring liquid level is that ultrasonic wave carries out in air When propagation, signal strength will appear very big loss；And when ultrasonic wave is propagated in a liquid, signal strength is almost It remains unchanged, to determine the liquid level of liquid using the propagation characteristic；When the liquid in container soon close to top and submerges recessed After slot 21, the decay intensity of ultrasonic wave generates variation, judges that liquid level will arrive top with this.

The utility model is using built-in structure and is utilized propagation characteristic of the ultrasonic wave in air and liquid and detects The liquid level of liquid, measurement result accurate and effective and signal transmission distance is short are transmitted high sensitivity, are effectively avoided because of thick liquid The phenomenon that adhering to and leading to false alarm generation, and structure is simple, easy to operate, long service life.

Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations； Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those of skill in the art that its according to It is so possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is replaced on an equal basis It changes；And these are modified or replaceed, various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution Spirit and scope.

Claims (4)

1. an ultrasonic liquid level switch for measuring viscous liquid, comprising shell, electronic control device, adapter sleeve, extension sleeve, liquid level probe, non-stick ring sleeve, signal line, transmitting crystal and receiving crystal, it is characterized in that, The inside of the casing is provided with an electronic control device, the lower side of the casing is provided with an adapter sleeve, the lower end of the adapter sleeve is provided with an extension sleeve, and the lower end of the extension sleeve is provided with a liquid level probe; The side or end face of the bit probe is provided with a groove; the opposite sides of the groove are respectively provided with a transmitting crystal and a receiving crystal; the transmitting crystal and the receiving crystal are both connected with the electronic control device through a signal line; the The extension sleeve and the liquid level probe are covered with a detachable non-stick ring sleeve, and the opposite sides of the two sides of the groove are also provided with a non-stick coating. 2 . The ultrasonic liquid level switch for measuring viscous liquid according to claim 1 , wherein the signal line is inserted through the liquid level probe, the extension sleeve and the adapter sleeve. 3 . 3 . The ultrasonic liquid level switch for measuring viscous liquid according to claim 1 , wherein the liquid level probe has a cylindrical structure. 4 . 4. The ultrasonic liquid level switch for measuring viscous liquid according to claim 1, wherein the non-stick ring sleeve is provided with a notch that cooperates with the groove; the non-stick coating and the notch spliced to each other.