CN2144307Y - Measurer for carbon dioxide gas concentration - Google Patents

Abstract

The utility model discloses a detector for detecting density of carbon dioxide gas, and is made according to an Orsat gas analysis theory, comprising a gas reaction chamber (1), a gas inlet (2), a gas outlet (3), a connecting tube (4), a graduated scale (5), a reaction liquid chamber (6), and a gas pressure action port (8), and is characterized in that the utility model is also provided with an indicating liquid chamber (9) and an indicating tube (10), wherein, the indicating liquid chamber (9) is arranged beside the reaction liquid chamber (6); the indicating liquid chamber (9) and the gas reaction chamber are respectively communicated with the indicating tube (10); a negative pressure valve (11) is arranged on the indicating tube (10); the gas pressure action port (8) is arranged on the indicating liquid chamber (9). The utility model is used for detecting the density of the carbon dioxide gas in carbon dioxide biological culture boxes or other apparatuses.

Description

Measurer for carbon dioxide gas concentration

The utility model relates to a kind of detector for measuring density of carbon dioxide gas, and it is applicable to the usefulness of the density of carbon dioxide gas in monitoring carbon dioxide bio-incubator and the Other Instruments.

At present, the instruments such as carbon dioxide bio-incubator of biology, medical science, agricultural research have been widely used in, monitor its duty by detector for measuring density of carbon dioxide gas, whether the density of carbon dioxide gas in the instruments such as carbon dioxide bio-incubator is accurate, directly influences test findings.Because China's power supply cycle instability and incubator quality problems, the normal appearance can't analyze the researcher to its experimental result because of the inaccurate phenomenon of gas concentration lwevel control in the incubator accurately.Therefore, need to detect through detector for measuring density of carbon dioxide gas commonly used.In the prior art, detector for measuring density of carbon dioxide gas is to be absorbed by potassium hydroxide solution in gas reaction chamber by the carbon dioxide in the tested gas, form negative pressure, the principle that the liquid level that induces reaction changes is that the austenite gas analysis principle is made (see figure 1).It by air intake opening (2) and exhausr port (3) on gas reaction chamber (1), reaction liquid chamber (6), connecting pipe (4), the gas reaction chamber (1), be connected rule (5) on the tube edge, the stress reaction sheet rubber (7) and the atmospheric pressure functional port (8) that react liquid chamber (6) bottom surface form, wherein, gas reaction chamber (1) and reaction liquid chamber (6) are communicated with formation vertical " worker " font vessel by connecting pipe (4).During use, tested gas enters the gas reaction chamber (1) from air intake opening (2), and former indoor gas is discharged from from exhausr port (3) simultaneously, closes the inlet and outlet mouth, with the instrument reversing, reactant liquor is mixed with tested gas.Instrument is upright again, reactant liquor refluxes, because the carbon dioxide in the tested gas is absorbed, reaction chamber negative pressure occurs in (1), stress reaction sheet rubber (7) raises up under negative pressure and atmospheric pressure effect, has changed the volume of reaction chamber, and the reactant liquor liquid level is risen, lifting height records gas concentration lwevel according to liquid level by rule along with gas concentration lwevel in the tested gas just changes.Open exhausr port (3), negative pressure state is destroyed, and liquid level build-up is normal.Its weak point is: the insufficient sensitivity height, because sheet rubber (7) has self tension force, offset the negative pressure behind the partial reaction, and therefore influenced sensitivity; Accurately and reliability not high enough, can reduce in time, adopt sheet rubber (7) as the main working parts that changes the indication liquid level, the accuracy of its mensuration is subjected to the constraint of sheet rubber own characteristic, be highly basic because of the potassium hydroxide reactant liquor again, be easy to make sheet rubber aging, add that there is non-linear modification in rubber, is interfered accuracy of measurement; 3. be stressed serviceable life and react the direct influence of sheet rubber (7), sheet rubber (7) is easily aging, and because this product is produced in USA, and it is very difficult to change parts at home, and expense is very high, tends to because of sheet rubber (7) is aging whole instrument be scrapped; 4. cost an arm and a leg, imported product, bid is at least more than the Zai $1000 unit.

The purpose of this utility model is exactly in order to overcome weak point of the prior art, provides accurately and reliably a kind of, and is highly sensitive, long service life, lower-cost detector for measuring density of carbon dioxide gas.

The purpose of this utility model can realize by following technical measures: also be to make according to the austenite gas analysis principle, it is by gas reaction chamber (1), air intake opening (2), exhausr port (3), connecting pipe (4), rule (5), reaction liquid chamber (6) and air pressure functional port (8) are formed, gas reaction chamber (1) is communicated with formation " worker " font vessel by connecting pipe (4) with reaction liquid chamber (6), it is characterized in that it also is provided with an indication liquid chamber (9) and an inditron (10), wherein inditron (10) two ends respectively with indication liquid chamber (9) and gas reaction chamber UNICOM, on inditron (10), be provided with a negative pressure valve (11), rule (5) is located at inditron (10) and locates, gas pressure mouth (8) then is positioned on the indication liquid chamber (9), makes indication liquid chamber (9) and atmosphere UNICOM.

The utility model can adopt glass, plastics or organic glass to make.

During use, open air inlet and vent valve (2), (3), tested gas is sent in the gas reaction chamber (1), simultaneously original gas is drained, close air inlet and exhausr port (2), (3), instrument is reversed, reactant liquor is mixed with tested gas, recover upright state then again.Because the carbon dioxide in the tested gas is absorbed, negative pressure appears in the reaction chamber, open the negative pressure valve (11) on the inditron (10), gas reaction chamber (1) is communicated with indication liquid chamber (9) by inditron (10), then indicator solution under the effect of atmosphere in inditron (10) the rising liquid level, liquid level depends on concentration of carbon dioxide in the tested gas, concentration is higher, then liquid level is higher, thereby indicate concentration of carbon dioxide according to rule, exhausr port (3) is opened, negative pressure state is destroyed, the indicator solution liquid level build-up is normal, and instrument is reusable.

The utility model compared with prior art has following advantage: 1. and highly sensitive, directly utilize the pressure differential between whole atmospheric pressure and negative pressure, abandon the link of rubber deformation of the prior art, thereby improved the sensitivity of measuring; 2. more accurately and reliably, do not adopt stress reaction sheet rubber of the prior art, and directly utilize reacted negative pressure that the indication liquid level is risen, therefore more accurately and reliably; 3. long service life because of no longer being subjected to the influence in rubber life-span, being reacted liquid chamber and is separated with the indication liquid chamber, does not have fragile or aging parts, and increase serviceable life greatly; 4. cost reduces, and is economical and practical.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is the main pseudosection of existing product;

Fig. 2 is the main pseudosection of a kind of embodiment of the present utility model;

Fig. 3 is the main pseudosection of the another kind of embodiment of the utility model.

Detector for measuring density of carbon dioxide gas shown in Figure 2 is one of embodiment of the present utility model, it is by gas reaction chamber (1), air intake opening (2), exhausr port (3), connecting pipe (4), reaction liquid chamber (6), rule (5), indication liquid chamber (9), inditron (10) and air pressure functional port (8) are formed, wherein react liquid chamber (6) and be positioned at the bottom of instrument side by side with indicating liquid chamber (9), have gas pressure mouth (8) on the indication liquid chamber (9), this mouthful end face is higher than indication liquid chamber (9), rule (5) unites two into one with inditron (10), rule 5 is printed on the inditron (10), the upper end UNICOM of inditron (10) is provided with negative pressure valve (11) in gas reaction chamber (1) at the position near gas reaction chamber (1).Reactant liquor adopts potassium hydroxide, and liquid level is positioned at high slightly position, connecting pipe lower end, and the indicator solution liquid level is concordant with the reaction liquid level, promptly is positioned at high slightly position, inditron lower end.Whole instrument is made by glass.

Detector for measuring density of carbon dioxide gas shown in Figure 3 is two of embodiment of the present utility model, different with last example is, adopt T-valve (2) to integrate the end face that air intake opening, exhausr port and negative pressure valve are positioned at gas reaction chamber (1), so that operation, insert in the indication liquid chamber (9) bottom of inditron (10), rule (5) is located at inditron (10) side, and the gas pressure mouth is then opened in the upper surface of indication liquid chamber (9), and whole instrument is made by transparent plastic.

Claims (4)

1, a kind of detector for measuring density of carbon dioxide gas, it is by gas reaction chamber (1), air intake opening (2), exhausr port (3), connecting pipe (4), rule (5), reaction liquid chamber (6) and air pressure functional port (8) are formed, gas reaction chamber (1) is communicated with reaction liquid chamber (6) by connecting pipe (4), it is characterized in that it also is provided with an indication liquid chamber (9) and an inditron (10), wherein, inditron (10) two ends respectively with indication liquid chamber (9) and gas reaction chamber UNICOM, on inditron (10), be provided with a negative pressure valve (11), rule (5) is located at inditron (10) and locates, and gas pressure mouth (8) then is positioned on the indication liquid chamber (9).

2, detector for measuring density of carbon dioxide gas according to claim 1, it is characterized in that gas pressure mouth (8) open the indication liquid chamber (9) the upper surface, its end face be higher than the indication liquid chamber (9).

3, detector for measuring density of carbon dioxide gas according to claim 1 and 2 is characterized in that gas outlet exhausr port and negative pressure valve are integrated, and is a T-valve (2), and inditron (10) upper end is by T-valve (2) and gas reaction chamber (1) UNICOM.

4, detector for measuring density of carbon dioxide gas according to claim 3 is characterized in that rule is printed on the inditron (10).

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