CN205958072U - A device sweeps for non -contact level meter - Google Patents

Abstract

The utility model provides a device sweeps for non -contact level meter, includes level meter mounting disc, air supply pipe, base plate, its characterized in that the circle shaped pipe ring that the air supply pipe welded for seamless steel pipe to there are a plurality of round holes its inboard opening, air feed pipe connector mill air supply pipe, this mill's air supply pipe is equipped with the governing valve, the level meter mounting disc is the ring flange, base plate also is the ring flange, level meter mounting disc, air supply pipe, steel column rigid coupling for the base plate. The utility model discloses can realize that it sweeps and handle with refrigeration and cooling to carry out the continuity to ultrasonic wave and radar level gauge probe, can be applied to and measure technical field.

Description

A kind of blow device for contactless level meter

Technical field

This utility model is related to field of measuring technique, it particularly relates to a kind of purging for contactless level meter Device.

Background technology

Using in instrument and meter field of measuring technique, contactless level meter does not connect because of its detecting element and measured medium Touch, gauge internal does not have a moving part, be widely used in manufacturing enterprise the advantages of high precision, reaction are fast, ultrasound wave and thunder Reaching level meter is exactly typical contactless level meter, and its operation principle is：Ultrasound wave or radar levelmeter are installed on tested appearance Device top, under the control of electronic unit, pops one's head in and launches ultrasound wave or radar wave impulse, sound wave or radar wave quilt to testee Body surface reflects, and part reflection echo is received and converted to the signal of telecommunication by probe；Again received from being transmitted into, its time with The distance popped one's head in testee is directly proportional；Electronic unit detects this time, calculates tested distance, draws thing place value.

During Production in Chemical Plant, the impact to ultrasound wave and radar levelmeter has following aspect：

1st, often with exothermic reaction, high temperature, aqueous vapor, dust are inevitable for Chemical Manufacture, and these are all just to restrict level meter The often factor of work, especially high temperature impact, accompanying drawing 1 is the impact figure to echo for the temperature, from fig. 1, it can be seen that temperature is 20 DEG C , all without changing, therefore reflection echo wave height is also constant for attenuation losses and piezoelectric effect.Less than 50 DEG C wave height start It is declined slightly, all keep more constant wave height, less than the 50 DEG C impacts that can not consider that temperature is brought to measurement afterwards.High temperature damages The performance of evil probe, even if being cooled back to room temperature, probe is launched and is received the ability of ultrasound wave nor is completely recovered to original Level, therefore pop one's head in after the certain number of times of applied at elevated temperature, performance can decline or even scrap.In chemical process, majority all exists More than 50 DEG C, so first having to reduce probe temperature.

2nd, the impurity such as probe attachment dirt, steam is the natural enemy of contactless level meter.The dirt of attachment, steam etc. reduce first Reflection wave signal receiving area, changes and increases reflex time, the accuracy of strong influence measurement and stability.So will protect Hold the clean of probe.

3. the level gauging equipment such as the groove in process units, tank is often accompanied by substantial amounts of acid mist, and gas attack is strong, temperature Height, not only affects the accuracy of level meter, has an effect on the service life of level meter.

To often result in measurement inaccurate for several factors above, or even causes deadlock phenomenon, not only impact produces Con trolling index, also Equipment breakdown and personnel casualty accidentses may be caused.

Prior art exists it is clear that having defect in actual use, and needs to be improved.The present utility model people The defect of thoughts prior art can be improved, and is that spy concentrates on studies and coordinates repetition test, finally propose a kind of reasonable in design and have Effect improves the utility model of prior art defect.

Content of the invention

This utility model designs a kind of blow device for contactless level meter, is to enable contactless level meter Long-period stable operation, obtains stable and accurate certainty of measurement, and maintenance is little, with the mesh reaching protective meter and mitigate manpower 's.

In order to realize this purpose, the technical solution of the utility model：

A kind of blow device for contactless level meter, including level meter mounting disc, air supply pipe, base disk, it is special Levy the circle shape pipe ring being that described air supply pipe is welded into for seamless steel pipe, and have multiple circular holes inside it, described supply Pipe connects plant source pipe, and this plant source pipe is equipped with regulating valve；Described level meter mounting disc is ring flange, and described base disk is also Ring flange；Described level meter mounting disc, air supply pipe, base disk are affixed with steel column.Described regulating valve is hand stop valve or is electricity Magnet valve.

During use, using bolt, base disk is fixed on the detection hole on tested container top, using bolt by level meter It is arranged in level meter mounting disc, the probe of level meter down, towards the measured object dignity under detection hole, then connects gas source pipe, With governor valve control tolerance size.

This utility model, using the factory air source of the gas at scene, is originated and easy for installation.

The air supply pipe of this utility model blow device probe below, can to probe 360 ° purge with entering Line Continuity with cold But cooling refrigeration is processed.The temperature of probe can be reduced, clean the debris on probe, keep the clean of probe.

If electromagnetic valve is connected with control room PLC and DCS system, can achieve automatic blowing and refrigeration.

This utility model structure is simple, rationally, purges and high cooling efficiency, installs and control mode is simple, operability By force, save manpower, accurately, avoid prior art often cleaning makes instrument service life more to the damage of instrument simultaneously for measurement Long, the scene of can be widely applied to has toxic gas, steam, medium to have bubble and float, environment and high severe of medium temperature Environment.

This utility model can be applicable to field of measuring technique.

Brief description

Fig. 1 is the impact figure to echo for the temperature；

Fig. 2 is this utility model structural representation;

Fig. 3 is level meter mounting disc structural representation;

Fig. 4 is base disk structural representation;

Fig. 5 is air supply pipe air blowing schematic diagram；

In figure：1st, level meter mounting disc;2nd, plant source pipe；3rd, air supply pipe；4th, steel column；5th, base disk；6th, regulating valve.

Specific embodiment

Embodiment one

Fig. 2 is installation and the structural representation of the present embodiment：A kind of blow device for contactless level meter, including Level meter mounting disc 1, air supply pipe 3, base disk 5 are it is characterised in that the circle shape that is welded into for seamless steel pipe of described air supply pipe 3 Pipe ring, and have multiple circular holes inside it, described air supply pipe 3 connects plant source pipe 2, and this plant source pipe 2 is equipped with regulating valve 6；Described level meter mounting disc 1 is ring flange, and described base disk 5 is also ring flange；Described level meter mounting disc 1, air supply pipe 3, Base disk 5 uses steel column 4 affixed.

Fig. 3 is level meter mounting disc structural representation;

Fig. 4 is base disk structural representation;

The big I of above-mentioned two single-piece manufactured sizes is carried out according to contactless level meter and erecting bed actual size size Make.

Fig. 5 is air supply pipe air blowing schematic diagram：

Air supply pipe 3 adopts the seamless steel pipe of ￠ 12mm, and the inner side of air supply pipe 3 has multiple circular holes, and aperture adopts ￠ 3mm left Right hole footpath.Controlled the air-blowing quantity of the air supply pipe 3 of porous by regulating valve 3, to probe and popped one's head in from porous air supply pipe 3 after connecting source of the gas Continuously being blown in lower section, reaches purging and refrigeration.

The present embodiment installation method：Gas source pipe 2 will be supplied, support mounting disc 1（Fig. 3）, air supply pipe 3, base disk 5（Fig. 4） Place by Fig. 2, then each part steel column 4 is welded one blow device of formation.Air supply pipe 3 welding position height is by surpassing The length of sound wave or radar levelmeter probe determines.Blow device can make indoors, take measure field and enter after making Row is installed.Plant source pipe 2 connected by air supply pipe 3, controls tolerance size with regulating valve 6, and regulating valve 6 for hand stop valve or can be Electromagnetic valve.

This utility model device is from 2 months in 2015 in Wengfu（Group）Co., Ltd's phosphoric acid plant, iodine recovery etc. Device add-assembly so far, in terms of ruuning situation, effect is significant, do not occur level meter fluctuation of service, measurement inaccurate and dead The phenomenon of machine, obtains the highly recognition of technologist, with Wengfu chemical company phosphoric acid I system Gypsum Fibrosum stock tank ultrasonic material level meter again As a example this refrigerating plant：

（1）Equipment cost：Using front, because there are toxic gas at scene, have bubble and high temperature, to ultrasonic with the presence of burn into Ripple probe impact is very big, and probe is perishable, uses 2 to 3 probes every year, after this utility model, more than a year, does not change at present Cross probe, cost-effective more than 60,000 yuan.

（2）Safety cost：Using front, instrument personnel clear up weekly probe 3 times about, clear up every time, instrument personnel wear Canister respirator, completely wet and be stained with tart flavour, visual range is little, and especially night work even more easily causes security incident, uses After this utility model, instrument personnel just clear up once for 1 year, and light cost of labor saves on much, and safety is then priceless！.

（3）Production cost：Using front, because live level meter is often forbidden, fluctuation of service, often result in Gypsum Fibrosum slurry Spilling and the erroneous judgement of technologist, thus waste a large amount of manpower financial capacities' cleaning slurry, after use, this situation is never again Occurred.

Very well, measurement accurately, improves production environment simultaneously, improves labor condition, section this utility model using effect About its social benefit such as cost of labor, safety cost and production cost is notable.

Claims (2)

1. a kind of blow device for contactless level meter, including level meter mounting disc（1）, air supply pipe（3）, base disk （5）It is characterised in that described air supply pipe（3）The circle shape pipe ring being welded into for seamless steel pipe, and have multiple circles inside it Hole, described air supply pipe（3）Connect plant source pipe（2）, this plant source pipe（2）Equipped with regulating valve（6）；Described level meter mounting disc （1）For ring flange, described base disk（5）Also it is ring flange；Described level meter mounting disc（1）, air supply pipe（3）, base disk（5）With Steel column（4）Affixed.

2. a kind of blow device for contactless level meter according to claim 1, described regulating valve（6）For manual Stop valve or be electromagnetic valve.