CN2235112Y

CN2235112Y - Photoelectric sensor level instrument

Info

Publication number: CN2235112Y
Application number: CN 95217340
Authority: CN
Inventors: 蔡亮
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-07-26
Filing date: 1995-07-26
Publication date: 1996-09-11
Anticipated expiration: 2005-07-26

Abstract

The utility model relates to a photoelectric sensor level instrument which comprises a sensor, an electronic amplificatory circuit, a transmission cable, a display instrument, a level alarm for an upper and a lower limits, a level indicator light for an upper and a lower limits, etc., by sequential connection. The sensor comprises infrared or visible light launch tubes and receiving tubes in pairs which are respectively and vertically arranged on the opposite both sides of the level observational glass tube of the photoelectric sensor level instrument. The number of the launch tubes is identical with the number of the receiving tubes with one-to-one correspondence. A miniature lightproof float is arranged in the glass tube. If lightproof liquid is arranged in the glass tube, the float can be disused. The utility model can realize level allopatric (lowland) display, and simultaneously has the functions of the level alarm and the automatic control for an upper and a lower limits. The utility model has the advantages of accuracy, reliability, direct view, long service life, no fear of scale formation, no maintenance, etc.

Description

Photoelectric sensing liquid level instrument

The utility model relates to a kind of liquid level instrument, especially a kind of use light sensor spare (comprising the infrared ray sensing device), can realize that strange land (lowland) observes and have the liquid level instrument of upper and lower liquid level warning function.

Present widely used various liquid level instrument, limnimeter with the boiler use, several nothing more than common float-type, probe-type, optical profile type, electric contact type or comparatively complicated any condenser type etc., and all there are various defectives to some extent in above-mentioned various limnimeter, as malfunctioning behind not accurate enough reliable, the scaling, the life-span short, inconvenience is cleaned and adjusted and can't realize problem such as strange land (lowland) observation.

The purpose of this utility model with regard to be that a kind of that the existing defective of above-mentioned various existing instruments designs is not afraid of fouling, the life-span is long, reliability is high in order to overcome, non-maintaining and can realize the limnimeter that strange land (lowland) is observed easily.

The purpose of this utility model is achieved like this: this photoelectric sensing liquid level instrument partly is made up of the sensor that is linked in sequence, electronic amplification circuit, transmission cable, display device, bound water-level alarm device and water level indicator light etc., sensor comprises that in couples homeotropic alignment is at infrared light or the VISIBLE LIGHT EMISSION pipe and the receiving tube of the relative both sides of liquid level sight glass pipe of equipment respectively, power valve is identical with receiving tube quantity and corresponding one by one, floating in glass tube have a miniature shading float, if dress is light tight liquid in the glass tube, then can not use float.

The utility model is because of using sensor, and is more directly perceived so contact liq not is not afraid of fouling, can show liquid level continuously.

Below in conjunction with accompanying drawing, be example with the plain cylindrical furnace, describe the utility model in detail.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of the utility model sensor.

Referring to Fig. 1, the utility model mainly is made up of six parts such as the sensor 1 that is linked in sequence, electronic amplification circuit 2, transmission cable 3, level displaying device 4, bound water-level alarm device 5 and water level indicator lights 6.

Electronic amplification circuit among the figure and luminous display driver circuit and up and down the water-level alarm circuit all belong to very common technology, available accomplished in many ways does not repeat them here.

In Fig. 2, sensor 1 of the present utility model is made up of three parts such as infrared ray (or visible light) power valve 7, infrared ray (or visible light) receiving tube 8, miniature shading floats 9, utilizes original glass water level observation tube 10 on the boiler in the use.Wherein power valve 7 and receiving tube 8 are paired correspondingly homeotropic alignment both sides outside glass tube 10, the accuracy requirement difference of then visual different occasions of the logarithm of Shi Yonging and water level observation is the amount doesn't matter at the scene, as what use in the glass tube is light tight liquid, and then placing the float 9 of glass tube 10 to omit need not.

Water level indicator light 6 is used for water (liquid) position and shows, its available common double color luminotron or miniature incandescent lamp are realized, its quantity and arrange transmitting and receiving in best and the sensor 1 to pipe (7,8) logarithm and arrange consistent, so that observer's sensation is more direct and very clear, and the shown color of luminotron is preferably observed the respective specified of relevant industry and is passed through example.As being used for the observation of boiler water level and when showing, it has water section to should be green, it is red that no water section or gas partly should be, promptly in accordance with the regulation of " vapour is red, light green ".

Describe principle of work of the present utility model and process in detail below in conjunction with accompanying drawing.

Power valve 7 and receiving tube 8 for corresponding and homeotropic alignment one by one in glass tube 10 both sides, so each receives only after pipe 8 receives the infrared light or visible light that corresponding power valve 7 sent, because the existence of the float 9 in the glass tube 10 then can stop the reception of receiving tube 8 on the correspondence position, makes it can not receive light signal.Because being the variations with water level, float 9 fluctuates, so in circuit design, as long as with the position of being blocked by float 9 is boundary, make in this position and send corresponding ruddiness with the luminotron on top, and all send green glow at this luminotron below position, and along with the fluctuating of float 9, the length red, green glow in the luminotron of being arranged is also made respective change simultaneously, and this has just realized the automatic demonstration of water level.

The present invention also can have another embodiment, when promptly adorning lighttight liquid in glass tube 10, because directly shading of liquid, so can omit need not for above-mentioned miniature shading float 9.

Suitably the length of lengthening transmission cable just can realize reliably that the strange land (lowland) of water level shows and observation.Under very necessary situation, can encode, modulate the electric signal of above-mentioned liquid level, to reduce the radical of transmission cable, form that also can radiowave sends, be reduced into original signal at receiving end through demodulation, decoding, to increase the distance that the strange land is observed.

When red light (vapour) drops to a certain lower position, or green light (water) is when rising to a certain upper limit position, and the warning circuit in the instrument is triggered and sends corresponding sound, visual alarm, reminds the relevant personnel in time to take corresponding measure.In addition, the utility model also can be connected corresponding feedwater or steam exhaust device automatically when sending alerting signal, thereby further realizes the Automatic Control of liquid level.

Claims

1. photoelectric sensing liquid level instrument, it is characterized in that it is made up of the sensor that is linked in sequence [1], electronic amplification circuit [2], transmission cable [3], display device [4], bound liquid level alarm device [5] and liquid level pilot lamp parts such as [6], described sensor [1] comprises and is used in couples homeotropic alignment respectively at the liquid level sight glass pipe [10] of the equipment infrared or VISIBLE LIGHT EMISSION pipe [7] and the receiving tube [8] of both sides relatively, described power valve is identical with receiving tube quantity and corresponding one by one, and the liquid in described glass tube [10] is light tight liquid.

2. photoelectric sensing liquid level instrument, it is characterized in that it is made up of the sensor that is linked in sequence [1], electronic amplification circuit [2], transmission cable [3], display device [4], bound liquid level alarm device [5] and liquid level pilot lamp parts such as [6], described sensor [1] comprises and is used in couples homeotropic alignment respectively at the liquid level sight glass pipe [10] of the equipment infrared or VISIBLE LIGHT EMISSION pipe [7] and the receiving tube [8] of both sides relatively, described power valve is identical with receiving tube quantity and corresponding one by one, and floating in described glass tube [10] have a miniature shading float [9].

3. according to the described photoelectric sensing liquid level of claim 1 instrument, it is characterized in that described display device is double color luminotron or bulb.