A gas absorption reagent tester and a test method thereof

Abstract

The present invention discloses a gas absorption reagent tester, comprising a vertically arranged waterproof shell and a liquid storage tank embedded in the bottom of the waterproof shell; a ventilation overflow pipe is vertically arranged on the top of the liquid storage tank, a measuring cup is installed on the top of the liquid storage tank, a support plate for placing the test agent is arranged in the measuring cup, and a sealing end cover is arranged on the top of the measuring cup; a first liquid inlet pipe extending into the measuring cup is arranged on the side wall of the waterproof jacket, a second liquid inlet pipe connecting the measuring cup and the liquid storage tank is arranged in the waterproof jacket, a first liquid outlet pipe extending into the liquid storage tank is arranged on the bottom of the side wall of the waterproof jacket, and an overflow pipe extending into the ventilation overflow pipe is arranged at the bottom of the waterproof shell. The present invention has high test accuracy and avoids the harm of the corrosive liquid used in the test to the human body. The present invention also discloses a test method for a gas absorption reagent tester.

Description

Technical Field

[0001] The invention relates to the field of gas absorption reagent testing, and in particular to a gas absorption reagent testing instrument and a testing method thereof. Background Art

[0002] At present, some gas absorption reagents are usually needed to remove gases that are harmful to the human body, anesthesia, industrial production or food quality in the fields of life, anesthesia, industrial production or food packaging. Take the deoxidizer used in food packaging and the carbon dioxide absorber used in fruit and vegetable preservation as examples.

[0003] Deoxidizer is an additive that can absorb oxygen and slow down the oxidation of food. Deoxidizer can effectively inhibit the growth of mold and aerobic bacteria, extend the shelf life of food, and also play a good role in preventing oil rancidity, preventing the oxidation and browning of meat, and preventing the loss of vitamins in food. Therefore, the test of the deoxidation amount of deoxidizer has a great guiding significance for the use of deoxidizer.

[0004] At present, the existing deoxidizer testing device has low test accuracy, inconvenient ventilation, and easy to produce test errors. Taking the laboratory test of the deoxidation amount of the deoxidizer as an example, the test process includes the following four steps:

[0005] Step 1: Place the deoxidizer to be tested into a small-caliber container with scales and fix it to the bottom of the container;

[0006] Step 2: Invert the small-diameter cavity containing the deoxidizer in the first step into a large-diameter container containing water;

[0007] Step 3: Extend the ventilation hose into the small-diameter container, use the ear suction bulb to suck out some of the air in the small-diameter container, so that the liquid level reaches the maximum scale value of the small-diameter container, record the initial scale, and record the changes in scale, time, temperature, humidity and atmospheric pressure during the test;

[0008] Step 4: Observe and record the liquid level rise at regular intervals. The difference between the mark reached by the liquid level in the small-diameter container and the initial mark of the liquid level in the small-diameter container is the oxygen absorption capacity of the deoxidizer.

[0009] From the above, we can see that although the tools used in laboratory testing of deoxidizers are simple, the steps are cumbersome. Deoxidizers are easy to fall off from small-caliber containers, and the operation during ventilation is cumbersome and prone to errors. In addition, for special deoxidizer tests, such as constant pressure deoxidizer tests, some corrosive liquids are needed instead of water, which can easily cause harm to testers and is not conducive to use.

[0010] Carbon dioxide absorbers are often used in the preservation of fruits and vegetables. Currently, there are few testing tools for carbon dioxide absorbers, the testing methods are cumbersome, and the efficiency and accuracy are low.

[0011] In view of this, the inventor of this case conducted in-depth research on the above-mentioned issues, which led to the creation of this case. Summary of the invention

[0012] The purpose of the present invention is to provide a gas absorption reagent tester, which is not only simple to operate and has high test accuracy, but also avoids the harm of the corrosive liquid used in the test to the human body.

[0013] Another object of the present invention is to provide a testing method for a gas absorption reagent tester.

[0014] In order to achieve the above object, the solution of the present invention is:

[0015] A gas absorption reagent tester, characterized in that it comprises a vertically arranged water-proof shell and a liquid storage tank embedded in the bottom of the water-proof shell;

[0016] The top of the liquid storage bin is provided with a ventilation overflow pipe extending vertically upwards, a measuring cup is also vertically installed on the top of the liquid storage bin, the scale line on the measuring cup has a zero scale, the top of the ventilation overflow pipe is higher than the zero scale, the measuring cup is clamped between the side wall of the waterproof shell and the side wall of the ventilation overflow pipe, a supporting plate with fine holes for placing the test agent above the scale line is provided in the measuring cup, an opening is provided on the top of the measuring cup, a sealing end cover is provided at the opening, and an airtight valve is provided on the sealing end cover;

[0017] An overflow hole is provided at the bottom of the waterproof shell corresponding to the ventilation overflow pipe, an overflow pipe is provided in the overflow hole and extends vertically upward to the ventilation overflow pipe, and the top of the overflow pipe is aligned with the zero scale;

[0018] A first liquid inlet pipe is sealedly connected to the side wall of the water-proof shell, and the position of the first liquid inlet pipe is higher than the zero scale. The first end of the first liquid inlet pipe passes through the side wall of the measuring cup and extends into the measuring cup, and the second end of the liquid inlet pipe passes through the side wall of the water-proof shell and is provided with a liquid inlet valve. A second liquid inlet pipe for connecting the liquid storage bin and the measuring cup is provided in the water-proof shell, the first end of the second liquid inlet pipe passes through the bottom of the measuring cup and is exposed at the bottom of the measuring cup, the second end of the second liquid inlet pipe passes through the top of the liquid storage bin and extends into the bottom of the liquid storage bin, and a first liquid outlet pipe is provided at the bottom of the side wall of the water-proof shell, the first end of the first liquid outlet pipe passes through the side wall of the liquid storage bin and extends into the bottom of the liquid storage bin, and the second end of the first liquid outlet pipe passes through the bottom of the side wall of the water-proof shell and is provided with a first liquid outlet valve.

[0019] A first inclined portion is provided at the bottom of the waterproof shell, the ventilation overflow pipe corresponds to the highest position of the first inclined portion up and down, the bottom of the liquid storage tank is inclined corresponding to the first inclined portion, the second end of the second liquid inlet pipe extends into the lowest position of the bottom of the liquid storage tank, the first end of the first liquid outlet pipe passes through the side wall of the liquid storage tank and extends into the lowest position of the bottom of the liquid storage tank, and the inner side wall of the top of the liquid storage tank is provided with a second inclined portion parallel to the first inclined portion.

[0020] The volume of the measuring cup is greater than or equal to 1000mL, the zero scale is set at a position at or above one-quarter the height of the measuring cup, the maximum scale value of the scale line is at least 250mL, the minimum scale of the scale line is set at or above five percent of the height of the measuring cup, the minimum scale is less than or equal to -50mL, and the volume of the liquid storage tank is greater than or equal to 200mL.

[0021] The watertight shell, the measuring cup and the liquid storage tank are cylindrical, the outer circular side wall of the liquid storage tank is tightly attached to the inner circular side wall of the watertight shell, and the ventilation overflow pipe is against the inner circular side wall of the watertight shell.

[0022] The watertight shell, the measuring cup, the liquid storage tank and the ventilation overflow pipe are square in shape, the four side walls of the liquid storage tank are tightly fitted with the four side walls of the watertight shell in one-to-one correspondence, three side walls of the ventilation overflow pipe are tightly fitted with three side walls of the watertight shell in one-to-one correspondence, three side walls of the measuring cup are tightly fitted with three side walls of the watertight shell in one-to-one correspondence, and the remaining side wall of the measuring cup is tightly fitted with the remaining side wall of the ventilation overflow pipe.

[0023] A sealing block is embedded in the gap between the top of the side wall of the water-proof shell and the top of the side wall of the measuring cup to seal the gap between the measuring cup and the water-proof shell. The side wall of the water-proof shell is also provided with a vent hole for ventilation between the ventilation overflow pipe and the outside of the water-proof shell. The position of the vent hole is higher than the ventilation overflow pipe.

[0024] A water stop plug is also embedded in the bottom of the overflow pipe, and a second liquid outlet pipe is also provided at the bottom of the side wall of the watertight shell, which passes through the side wall of the watertight shell and the side wall of the overflow pipe and extends into the overflow pipe. A second liquid outlet valve is provided at the end of the second liquid outlet pipe exposed from the watertight shell, and the volume of the ventilation overflow pipe above the zero scale is greater than 20mL.

[0025] The side wall of the watertight shell is also provided with an air inlet pipe which passes through the side wall of the watertight shell and the side wall of the measuring cup and extends into the measuring cup. An air inlet valve is provided at the end of the air inlet pipe exposed from the watertight shell. The scale value of the scale line and the volume of the liquid storage tank are at least 1000mL. The diameter of the overflow pipe is 3mm-5mm. The position of the first liquid inlet pipe is higher than the top of the scale line. The position of the air inlet pipe is equal to or higher than the position of the first liquid inlet pipe. The side wall of the measuring cup is provided with a warning line for controlling the maximum liquid inlet amount at a position 1mm-20mm below the first liquid inlet pipe. A ventilation pipe is provided on the vent hole. A ventilation valve is connected to the ventilation pipe. The gap between the top of the side wall of the measuring cup and the top of the side wall of the watertight shell is sealed by the sealing block.

[0026] A method for testing a gas absorption reagent tester comprises the following steps:

[0027] (1) First, the liquid level in the measuring cup is adjusted to zero for the first time, the first liquid outlet valve is closed, the liquid inlet valve and the airtight valve are opened, and liquid is introduced into the measuring cup and the liquid storage tank from the first liquid inlet pipe. When the liquid storage tank is full of liquid and liquid flows out from the overflow pipe, the liquid introduction is stopped and the liquid inlet valve is closed; when liquid no longer flows out of the overflow pipe and the liquid level in the measuring cup is stable and stays at the zero scale, the first zero adjustment of the liquid level in the measuring cup is completed.

[0028] (2) Add the deoxidizer to be tested into the support plate, cover the sealing end cover, close the airtight valve, and then start the test. During the test, the deoxidizer absorbs the oxygen in the measuring cup, so that the pressure in the measuring cup decreases. Under the action of atmospheric pressure, the liquid in the liquid storage tank is replenished into the measuring cup through the second liquid inlet pipe, so that the liquid level in the measuring cup rises.

[0029] (3) Record data at regular intervals, and determine whether ventilation is needed based on the approximate oxygen absorption of the deoxidizer and the air volume in the measuring cup during the test. If the volume of the remaining gas in the measuring cup is sufficient and the amount of oxygen contained is sufficient for the deoxidizer to be tested to absorb, then ventilation is not required. If the oxygen content of the remaining gas in the measuring cup is insufficient or it is impossible to accurately determine whether the oxygen content is sufficient, ventilation is performed during the test. Each time the data is recorded, the airtight valve is opened for ventilation. When ventilation is completed, wait until the liquid level stabilizes and returns to the zero scale, the ventilation is completed, and then the airtight valve is closed and the test is continued. When the liquid level in the measuring cup no longer changes, that is, the increase in oxygen absorption is 0, the test is completed.

[0030] A testing method for a gas absorption reagent tester comprises the following steps:

[0031] (1) The gas absorption reagent tester is placed horizontally, that is, the zero scale of the measuring cup is horizontal. First, the gas absorption reagent to be measured is placed in the support plate, and the density of the gas absorbent is greater than that of air. Then, the liquid inlet valve, the second liquid outlet valve, the vent valve and the airtight valve are opened, and the sealing end cover, the air inlet valve and the first liquid outlet valve are closed. Liquid that is immiscible with the gas to be absorbed is continuously introduced from the first liquid inlet pipe. When liquid flows out of the second liquid outlet valve, the second liquid outlet valve and the vent valve are closed, and liquid is continuously introduced into the measuring cup through the liquid inlet valve. When the liquid level rises to the warning line, the liquid introduction is stopped. At this time, the liquid inlet valve is closed, and the air inlet valve is opened. The gas to be absorbed is introduced into the measuring cup through the air inlet pipe, and the excess gas in the measuring cup is discharged through the airtight valve.

[0032] (2) After the gas to be absorbed has been introduced for 20s-30s, close the airtight valve 321, and open the second liquid outlet valve and the vent valve at the same time, continue to introduce the gas to be absorbed through the air inlet pipe, and connect a hose to the end of the second liquid outlet pipe exposed from the waterproof shell, and the hose is passed into a collection bottle for collecting liquid in the tester; when the liquid level in the measuring cup is close to the zero scale position of 3mL-5mL, reduce the air intake speed of the gas to be absorbed, and when the liquid level in the measuring cup returns to the zero scale, close the air inlet valve, and start timing when no liquid flows out of the second liquid outlet pipe, and record the scale value corresponding to the liquid level at this time.

[0033] (3) After a certain period of time, before the liquid level in the measuring cup rises to 1000 mL, record the scale value of the liquid level at this time, then ventilate the measuring cup, close the second liquid outlet pipe, open the air inlet valve, and input the gas to be absorbed into the measuring cup through the air inlet pipe. When the liquid level in the measuring cup is close to the zero scale position of 3 mL-5 mL, reduce the air intake speed of the gas to be absorbed. When the liquid level in the measuring cup returns to the zero scale, close the air inlet valve to end the ventilation.

[0034] (4) When the liquid level in the measuring cup stops at a position below 1000 mL and does not rise any more, the test is finished. The absorption amounts of the gas to be absorbed recorded during the test are added together to calculate the total absorption amount of the gas to be absorbed by the gas absorption reagent.

[0035] After adopting the technical scheme of the present invention, taking the test of deoxidizer as an example, during the test, first close the first liquid outlet valve, open the liquid inlet valve and the airtight valve, and fill the liquid into the measuring cup and the liquid storage tank from the first liquid inlet pipe. When the liquid storage tank is full of liquid and the liquid flows out from the overflow pipe, stop filling the liquid, wait for the liquid level to stabilize and stay at the zero scale, close the liquid inlet valve, add the gas absorption reagent to be tested to the support plate, cover the sealing end cover, and then close the airtight valve to start the test. Record data at regular intervals, and decide whether ventilation is needed based on the approximate oxygen absorption amount of the gas absorption reagent and the air volume in the measuring cup during the test; if ventilation is not needed, wait for a while. When the liquid level in the measuring cup no longer changes after a certain period of time, record the data and complete the test; if ventilation is required, open the airtight valve for ventilation each time the data is recorded. When ventilating, wait until the liquid level is stable and returns to the zero scale, close the airtight valve, and continue the test. When the liquid level in the measuring cup no longer changes, the test is completed; it can be seen from the above that the present invention has good sealing performance during the test process, the deoxidizer is placed stably, and the ventilation is simple, so the test accuracy is high, and when testing the deoxidizer, the tester does not need to contact the test liquid. Taking the test of the constant pressure deoxidizer as an example, the corrosive liquid used in the test of the constant pressure deoxidizer is avoided. Harm to the human body.

[0036] Furthermore, due to the setting of the first inclined portion, and the ventilation overflow pipe is set corresponding to the highest position of the first inclined portion, the bottom of the liquid storage tank is inclined corresponding to the first inclined portion, and the second end of the second liquid inlet pipe extends into the lowest position of the bottom of the liquid storage tank. The inner side wall of the top of the liquid storage tank is provided with a second inclined portion parallel to the first inclined portion, so that when the liquid in the measuring cup enters the liquid storage tank through the second liquid inlet pipe, it can be drained through the first inclined portion and the second inclined portion to fill the liquid storage tank, and when the liquid in the liquid storage tank flows back to the measuring cup, it can be drained through the first inclined portion and the second inclined portion to flow back into the measuring cup as much as possible; and because the first end of the first liquid outlet pipe passes through the side wall of the liquid storage tank and extends into the lowest position of the bottom of the liquid storage tank, when draining, the liquid in the liquid storage tank can be basically discharged through the first liquid outlet pipe.

[0037] Furthermore, the waterproof shell, measuring cup and liquid storage tank are designed to be cylindrical, which is easy to clean. The waterproof shell, measuring cup and liquid storage tank are arranged closely to each other, making the overall structure compact and firm.

[0038] Furthermore, the waterproof shell, measuring cup, liquid storage tank and ventilation overflow pipe can also be set to a square shape. Since the liquid storage tank, ventilation overflow pipe and measuring cup are arranged close to each other, the gas absorption reagent tester has a compact structure and improved stability, which facilitates the corresponding positioning between the holes passed by the first liquid inlet pipe, the holes passed by the second liquid inlet pipe and the holes passed by the first liquid outlet pipe. The corresponding positioning is accurate and the installation is convenient, thereby improving the airtightness of the gas absorption reagent tester.

[0039] Furthermore, the setting of the sealing block is beneficial to the stability and firmness of the tester, improves the aesthetics of the tester, and also prevents external pollutants from falling into the liquid storage tank and affecting the test due to the exposure of the ventilation overflow pipe; the setting of the vent hole enables the ventilation overflow pipe to maintain a balance with the external atmospheric pressure, ensuring the smooth progress of the test.

[0040] Furthermore, since a water stopper, a second liquid outlet pipe and a second liquid outlet valve are provided, and the volume of the ventilation overflow pipe above the zero scale is greater than 20 mL; liquid paraffin oil is used to test the difference between the oxygen absorption and the carbon dioxide release of the constant-pressure deoxidizer, and when the constant-pressure deoxidizer is abnormal, the carbon dioxide release will be slightly greater than the oxygen absorption, causing the liquid level in the ventilation overflow pipe to rise, and by closing the second liquid outlet valve, liquid paraffin oil can be prevented from flowing out of the second liquid outlet pipe, thereby reducing the waste of liquid paraffin oil; and since the volume of the ventilation overflow pipe above the zero scale is greater than 20 mL, it is sufficient to compensate for the difference between the carbon dioxide release and the oxygen absorption at this time, thereby preventing liquid paraffin oil from overflowing from the top of the ventilation overflow pipe.

[0041] Furthermore, the setting of the air inlet pipe and the air inlet valve facilitates the use of the gas absorption reagent tester to test gases with small content in the air such as carbon dioxide. The scale value of the scale line and the volume of the liquid storage tank are at least 1000mL, ensuring that there is sufficient liquid in the liquid storage tank to flow back and replenish the measuring cup; the position setting of the first liquid inlet pipe, the air inlet pipe and the warning line, as well as the setting of the ventilation pipe and the ventilation valve, make it possible to fully input liquid into the measuring cup during the test and exhaust air as much as possible. After the gas to be absorbed is introduced through the air inlet pipe, there is sufficient gas to be absorbed in the measuring cup for testing, which improves the efficiency of the test and avoids interference from other gases in the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] For ease of explanation, the present invention is described in detail with reference to the following specific embodiments and the accompanying drawings.

[0043] Figure 1 It is a cross-sectional schematic diagram of the present invention without an air intake pipe;

[0044] Figure 2 is a schematic diagram of a ventilation overflow pipe of the present invention;

[0045] Figure 3 It is a cross-sectional schematic diagram of a cylindrical measuring cup and a water-proof shell used in the present invention;

[0046] Figure 4 It is a cross-sectional schematic diagram of a square measuring cup and a water-proof shell used in the present invention;

[0047] Figure 5 A top view of a square measuring cup and a water-proof housing is used in the present invention;

[0048] Figure 6It is a cross-sectional schematic diagram of the air intake pipe of the present invention.

[0049] In the figure:

[0050] Waterproof shell-1 First liquid inlet pipe-11

[0051] Liquid inlet valve-111 Second liquid inlet pipe-12

[0052] First liquid outlet pipe-13 First liquid outlet valve-131

[0053] Overflow hole-14 Overflow pipe-141

[0054] Water stopper-142 First inclined part-15

[0055] Vent-16 Vent-161

[0056] Ventilation valve-162 Second liquid outlet pipe-17

[0057] Second liquid outlet valve-171 Inlet pipe-18

[0058] Inlet valve-181 Liquid storage tank-2

[0059] Ventilation overflow pipe-21 Second inclined portion-22

[0060] Measuring cup -3 Zero scale -31

[0061] Sealing end cap-32 Airtight valve-321

[0062] Support plate-33 Sealing block-34

[0063] Warning Line - 35 DETAILED DESCRIPTION

[0064] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0065] Example 1

[0066] like Figure 1 As shown, a gas absorption reagent tester includes a vertically arranged waterproof shell 1 and a liquid storage tank 2 embedded in the bottom of the waterproof shell 1.

[0067] A vertically upward ventilation overflow pipe 21 is provided at the top of the liquid storage bin 2, and a measuring cup 3 is sandwiched between the inner wall of the waterproof shell 1 and the outer wall of the ventilation overflow pipe 21. The bottom of the measuring cup 3 is against the top of the liquid storage bin 2, and the scale line on the measuring cup 3 has a zero scale 31. The setting of the zero scale 31 is convenient for observing and recording the liquid level in the measuring cup 3. The position of the zero scale 31 is lower than the top position of the ventilation overflow pipe 21. A support plate 33 with fine holes for placing the test agent above the scale line is provided in the measuring cup 3. The support plate 33 is arranged in the measuring cup 3 in a known manner. In this embodiment, an installation step is provided on the inner wall of the measuring cup 3 above the scale line, and the support plate 33 is placed on the installation step. An opening is provided at the top of the measuring cup 3, and a sealing end cover 32 is provided at the opening. The sealing end cover 32 is provided with an airtight valve to facilitate ventilation of the gas in the measuring cup 3 during the test.

[0068] An overflow hole 14 is provided at the bottom of the waterproof shell 1 corresponding to the ventilation overflow pipe 21. An overflow pipe 141 is provided in the overflow hole 14, which passes vertically upward through the liquid storage tank 2 and extends into the ventilation overflow pipe 21. The top of the overflow pipe 141 is flush with the zero scale 31, so that the liquid in the ventilation overflow pipe 21 automatically flows out when the liquid level is higher than the height of the overflow pipe 141. In this embodiment, in order to facilitate the drainage of the overflow pipe 141, the overflow hole 14 and the overflow pipe 141 are arranged in a well-known manner, that is, the overflow hole 14 is arranged against the inner side wall of the ventilation overflow pipe 21, and the side wall of the overflow pipe 141 is arranged against the inner side wall of the ventilation overflow pipe 21.

[0069] A first liquid inlet pipe 11 is sealedly connected to the side wall of the water-proof shell 1. The position of the first liquid inlet pipe 11 is higher than the zero scale 31. The first end of the first liquid inlet pipe 11 passes through the side wall of the measuring cup 3 and extends into the measuring cup 3. The second end of the first liquid inlet pipe 11 passes through the side wall of the water-proof shell 1 and is provided with a liquid inlet valve 111. Such a setting facilitates the control of the liquid inlet amount of the measuring cup 3. A second liquid inlet pipe 12 for connecting the liquid storage tank 2 and the measuring cup 3 is provided in the water-proof shell 1. The first end of the second liquid inlet pipe 12 passes through the bottom of the measuring cup 3. The second end of the second liquid inlet pipe 12 passes through the top of the liquid storage tank 2 and extends into the bottom of the liquid storage tank 2. Such a setting facilitates the mutual circulation of the liquid in the measuring cup 3 and the liquid in the liquid storage tank 2. A first liquid outlet pipe 13 is provided at the bottom of the side wall of the waterproof shell 1. The first end of the first liquid outlet pipe 13 passes through the side wall of the liquid storage tank 2 and extends into the bottom of the liquid storage tank 2. The second end of the first liquid outlet pipe 13 passes through the bottom of the side wall of the waterproof shell 1 and is provided with a first liquid outlet valve 131. The above-mentioned arrangement facilitates the liquid in the measuring cup 3 and the liquid storage tank 2 to be discharged from the first liquid outlet pipe 13, thereby avoiding liquid residue in the measuring cup 3 and the liquid storage tank 2.

[0070] Taking deoxidizer as an example, the test method of gas absorption reagent tester includes the following steps:

[0071] (1) First, the liquid level in the measuring cup 3 is adjusted to zero for the first time. The first liquid outlet valve 131 is closed, and the liquid inlet valve 111 and the airtight valve 321 are opened. Liquid is introduced into the measuring cup 3 and the liquid storage tank 2 from the first liquid inlet pipe 11. When the liquid storage tank 2 is full of liquid and the liquid flows out from the overflow pipe 141, the liquid introduction is stopped and the liquid inlet valve 111 is closed. When no liquid flows out of the overflow pipe 141 and the liquid level in the measuring cup 3 is stable and stays at the zero scale 31, the first adjustment of the liquid level in the measuring cup 3 to zero is completed.

[0072] (2) Add the deoxidizer to be tested into the support plate 33, cover the sealing end cover 32, close the airtight valve 321, and then start the test. During the test, the deoxidizer absorbs the oxygen in the measuring cup 3, so that the pressure in the measuring cup 3 decreases. Under the action of atmospheric pressure, the liquid in the liquid storage tank 2 is replenished into the measuring cup 3 through the second liquid inlet pipe 12, so that the liquid level in the measuring cup 3 rises.

[0073] (3) Record data at regular intervals, and determine whether ventilation is required based on the approximate oxygen absorption of the deoxidizer and the air volume in the measuring cup 3 during the test. If the volume of the remaining gas in the measuring cup 3 is sufficient and the oxygen content is sufficient for the deoxidizer to be tested to absorb, ventilation is not required. If the oxygen content of the remaining gas in the measuring cup 3 is insufficient or it is impossible to accurately determine whether the oxygen content is sufficient, ventilation is performed during the test. Each time the data is recorded, the airtight valve 321 is opened for ventilation. During ventilation, the air pressure in the measuring cup 3 is balanced with the atmospheric pressure, and the entire gas absorption reagent tester forms a communicating vessel, so that the liquid level in the measuring cup 3 falls back. When the liquid level is stable and returns to the zero scale 31, the ventilation is completed, and then the airtight valve 321 is closed to continue the test. When the liquid level in the measuring cup 3 no longer changes, that is, when the value-added of the oxygen absorption amount is 0, the test is completed.

[0074] It can be seen from the above that the present invention is not only simple to operate and has high test accuracy, but can also be used for a variety of deoxidizers. When testing the deoxidizer, the tester does not need to contact the test liquid, thus avoiding the harm to the human body caused by the corrosive liquid used when testing the constant pressure deoxidizer.

[0075] Preferably, a first inclined portion 15 is provided at the bottom of the waterproof shell 1, the ventilation overflow pipe 21 corresponds to the highest position of the first inclined portion 15 up and down, the bottom of the liquid storage tank 2 is inclined corresponding to the first inclined portion 15, the second end of the second liquid inlet pipe 12 extends into the lowest position of the bottom of the liquid storage tank 2, and the inner side wall of the top of the liquid storage tank 2 is provided with a second inclined portion 22 parallel to the first inclined portion 15; the first end of the first liquid outlet pipe 13 passes through the side wall of the liquid storage tank 2 and extends into the lowest position of the bottom of the liquid storage tank 2, so that after the test is completed, when draining, the liquid in the liquid storage tank 2 can be basically discharged through the first liquid outlet pipe 13. During the test, when the liquid in the measuring cup 3 enters the liquid storage tank 2 through the second liquid inlet pipe 12, it can be drained through the first inclined portion 15 and the second inclined portion 22 to fill the liquid storage tank 2; when the deoxidizer absorbs oxygen in the measuring cup 3, since the bottom of the liquid storage tank 2 is inclined corresponding to the first inclined portion 15, the second liquid inlet pipe 12 extending into the lowest position of the bottom of the liquid storage tank 2 can make the liquid in the liquid storage tank 2 flow back to replenish the measuring cup 3.

[0076] Preferably, the volume of the measuring cup 3 is 1000 mL, the zero scale 31 is set at a position of one quarter of the height of the measuring cup 3 or above, the maximum scale of the scale line is 250 mL, the minimum scale of the scale line is set at a position of five percent of the height of the measuring cup 3 or above, the minimum scale is -50 mL, and the volume of the liquid storage tank 2 is 200 mL. Such a setting ensures that there is enough oxygen in the measuring cup 3 for the deoxidizer to absorb, and also ensures that the liquid storage tank 2 has enough liquid to be added to the measuring cup 3.

[0077] Preferably, Figure 2 and Figure 3 As shown, the watertight shell 1, the measuring cup 3 and the liquid storage tank 2 are cylindrical, simple to shape, and easy to clean after testing; the outer circular side wall of the liquid storage tank 2 is tightly attached to the inner circular side wall of the watertight shell 1, and the ventilation overflow pipe 21 is against the inner circular side wall of the watertight shell 1, with a simple structure and compact connection.

[0078] Preferably, Figure 1 As shown, a sealing block 34 is embedded between the top of the side wall of the waterproof shell 1 and the top of the side wall of the measuring cup 3 to seal the gap between the measuring cup 3 and the waterproof shell 1. In this embodiment, a sealing block 34 is provided to seal the gap between the top of the measuring cup 3 and the top of the waterproof shell 1, which is beneficial to the stability and firmness of the tester, improves the aesthetics of the tester, and also prevents external pollutants from falling into the liquid storage tank 2 due to the exposure of the ventilation overflow pipe 21 to affect the test. The side wall of the waterproof shell 1 is also provided with a vent hole 16 for ventilation between the ventilation overflow pipe 21 and the outside of the waterproof shell 1. The position of the vent hole 16 is higher than the ventilation overflow pipe 21. The setting of the vent hole 16 ensures that the atmospheric pressure of the liquid storage tank 2 is balanced with that of the outside, and also avoids the siphon effect, ensuring the smooth progress of the test.

[0079] Preferably, a water stop plug 142 is also embedded in the bottom of the overflow pipe 141, and a second liquid outlet pipe 17 is also provided at the bottom of the side wall of the watertight shell 1, which passes through the side wall of the watertight shell 1 and the side wall of the overflow pipe 141 and extends into the overflow pipe 141. A second liquid outlet valve 171 is provided at one end of the second liquid outlet pipe 17 exposed from the watertight shell 1, and the volume of the portion of the ventilation overflow pipe 21 above the zero scale 31 is 50 mL. During the test, after the scale line is zeroed for the first time, the second liquid outlet valve 171 is closed. When the constant pressure deoxidizer is tested with liquid paraffin oil, if the constant pressure deoxidizer has an abnormal condition, at the initial moment of the test, the amount of carbon dioxide released is slightly greater than the amount of oxygen absorbed, the air pressure in the measuring cup 3 is enhanced, and the liquid level of the ventilation overflow pipe 21 rises. Since the second liquid outlet valve 171 is closed, the liquid paraffin oil is prevented from flowing out of the second liquid outlet pipe 17, reducing the waste of liquid paraffin oil. In addition, since the volume of the ventilation overflow pipe 21 above the zero scale 31 is 50 mL, when the constant pressure deoxidizer is used for food packaging and preservation, in order to avoid The package is damaged by expansion, and the maximum peak value of the carbon dioxide release being greater than the oxygen absorption is usually small. In addition, the time of two consecutive ventilations and recordings can be adjusted. Ventilation and recording can be performed before the liquid level in the ventilation overflow pipe 21 reaches the top, so that the liquid level in the ventilation overflow pipe 21 drops. Therefore, the volume of the ventilation overflow pipe 21 above the zero scale 31 is large enough to compensate for the difference between the carbon dioxide release and the oxygen absorption at this time, thereby avoiding the overflow of liquid paraffin oil from the top of the ventilation overflow pipe 21. When recording and ventilation next time, it is only necessary to replenish the measuring cup 3 and adjust the liquid level in the measuring cup 3 to zero for the second time.

[0080] In addition, before the first zeroing, a diversion hose can be connected to the end of the second liquid outlet pipe 17 exposed from the waterproof shell 1. This facilitates the collection of liquid flowing out of the overflow pipe 141 during the first zeroing, thereby avoiding liquid pollution to the test environment and harm to the human body. At the same time, when using liquid paraffin oil to test the constant pressure deoxidizer, the second liquid outlet valve 171 can be opened to collect the liquid paraffin oil flowing out of the second liquid outlet valve 171 during the test through the diversion hose, thereby reducing the waste of liquid paraffin oil.

[0081] After adopting the above technical solution, during the test, it is determined whether multiple ventilation is required according to the approximate oxygen absorption amount of the deoxidizer sampled for the test. The difference between the deoxidizer test method with multiple ventilation and the deoxidizer test method without ventilation is that the ventilation step is added, and the rest is the same; taking the method of multiple ventilation during the test as an example, the working method of the gas absorption reagent tester using this embodiment is as follows:

[0082] For common deoxidizers, ordinary water can be used as the test liquid. The test steps are as follows:

[0083] (1) The gas absorption reagent tester is placed horizontally, that is, the zero scale 31 of the measuring cup 3 is horizontal, the liquid inlet valve 111, the sealing end cover 32 and the second liquid outlet valve 171 are opened, the first liquid outlet valve 131 is closed, and a hose is connected to the end of the second liquid outlet pipe 17 exposed from the waterproof shell, and the hose is passed into the waste liquid collection bottle. Here, the hose and the waste liquid collection bottle are well-known instruments. Water is passed into the measuring cup 3 from the first liquid inlet pipe 11. Since the bottom of the overflow pipe 141 is blocked by the water stop plug 142, the liquid in the overflow pipe can only flow out from the second liquid outlet pipe 17. When water flows out of the second liquid outlet pipe 17, stop the water inlet. When no water flows out of the second liquid outlet pipe 17, the liquid level in the measuring cup 3 is stable and stays at the zero scale 31, and the liquid inlet valve 111 is closed.

[0084] (2) Open the airtight valve 321, put the common deoxidizer to be tested in the support plate 33, cover the sealing end cover 32, close the airtight valve 321, start the test, and start recording at the same time. During the test, the deoxidizer absorbs the oxygen in the measuring cup 3, so that the pressure in the measuring cup 3 decreases. Under the action of atmospheric pressure, the liquid in the liquid storage tank 2 is replenished into the measuring cup 3 through the second liquid inlet pipe 12, so that the liquid level in the measuring cup 3 rises.

[0085] (3) The test results are recorded at regular intervals. After each record is completed, the airtight valve 321 is opened to ventilate the test cup 3. The air pressure in the test cup 3 is balanced with the atmospheric pressure. The entire gas absorption reagent tester forms a communicating vessel, so that the liquid level in the test cup 3 drops. When the liquid level in the test cup 3 stabilizes and returns to the zero scale 31, the ventilation is completed. At this time, the airtight valve 321 is closed. After multiple tests, if there is no change in the liquid level in the test cup 3 in two adjacent records, it indicates that the test is completed.

[0086] (4) After the test is completed, open the first liquid outlet valve 131 to drain the water in the measuring cup 3.

[0087] The value recorded each time is recorded as the oxygen absorption in the corresponding time. After the water test is completed, the oxygen absorption obtained from each record is added together to obtain the total oxygen absorption of the tested common deoxidizer.

[0088] For constant pressure deoxidizers, since constant pressure deoxidizers release carbon dioxide when used, it is necessary to calculate both the oxygen absorption and carbon dioxide release during testing.

[0089] The test was carried out using a saturated potassium hydroxide solution and liquid paraffin oil, and the constant pressure deoxidizer to be tested was evenly divided into two parts. The test steps for the first constant pressure deoxidizer were basically the same as those for the ordinary constant pressure deoxidizer, except that saturated potassium hydroxide was used instead of water as the liquid used for the test, and a hose was connected to the first liquid outlet pipe 13, and the hose was connected to a potassium hydroxide collecting bottle, which is a well-known bottle for storing potassium hydroxide. After the test, the saturated potassium hydroxide in the measuring cup 3 and the liquid storage bin 2 was recovered.

[0090] Since saturated potassium hydroxide can absorb a large amount of carbon dioxide, and the amount of saturated potassium hydroxide used in the test method as described above is large, it is sufficient to completely absorb the carbon dioxide released by the first constant-pressure deoxidizer; therefore, the first constant-pressure deoxidizer is tested using the method as described above, and the value obtained in each record is the oxygen absorption in the corresponding time. After the test, the oxygen absorption obtained in each record is added together to obtain the total oxygen absorption of the first constant-pressure deoxidizer, which is recorded as X here.

[0091] The second constant-pressure deoxidizer is tested using liquid paraffin oil. The test steps for the second constant-pressure deoxidizer are basically the same as those for testing ordinary deoxidizers, except that liquid paraffin oil is used instead of water. In step (3), if the constant-pressure deoxidizer is abnormal, the amount of carbon dioxide released is greater than the amount of oxygen absorbed, so that the air pressure in the measuring cup 3 is increased, and the liquid paraffin oil enters the overflow pipe 141. Then, when recording and ventilating next time, liquid paraffin oil is introduced into the measuring cup 3 through the first liquid inlet pipe 11 for fluid replenishment. When the liquid level in the measuring cup 3 is stabilized and adjusted to the zero scale 31, the ventilation is completed, and the airtight valve 321 is closed at this time.

[0092] Since liquid paraffin oil does not absorb carbon dioxide, the second constant pressure deoxidizer is tested using the method described above. The value obtained in each record is the difference between the oxygen absorption and carbon dioxide release in the corresponding time. After the test, the difference between the oxygen absorption and carbon dioxide release obtained in each record is added to obtain the total difference between the oxygen absorption and carbon dioxide release of the second constant pressure deoxidizer, which is recorded as X1 here; since the two constant pressure deoxidizers are two equal parts of the same deoxidizer, and the test environment is the same, the total oxygen absorption of the first constant pressure deoxidizer is subtracted from the total difference between the oxygen absorption and carbon dioxide release of the second constant pressure deoxidizer, that is, X-X1. The carbon dioxide release of the second constant pressure deoxidizer can be obtained.

[0093] It can be seen from the above that the present invention is not only simple to operate and has high test accuracy, but can also be used for a variety of deoxidizers. When testing the deoxidizer, the tester does not need to contact the test liquid, thus avoiding the harm to the human body caused by the corrosive liquid used when testing the constant pressure deoxidizer.

[0094] Example 2

[0095] like Figure 1 , Figure 4 and Figure 5As shown, the difference between this embodiment and embodiment 1 is that the watertight shell 1, the measuring cup 3, the liquid storage tank 2 and the ventilation overflow pipe 21 are square, the four side walls of the liquid storage tank 2 are closely attached to the four side walls of the watertight shell 1, three side walls of the ventilation overflow pipe 21 are closely attached to the three side walls of the watertight shell 1, and the measuring cup 3 is embedded in the ventilation overflow pipe 21 and the watertight shell 1, that is, three side walls of the measuring cup 3 are closely attached to the three side walls of the watertight shell 1, and the remaining side wall of the measuring cup 3 is closely attached to the remaining side wall of the ventilation overflow pipe 21. Such a setting makes the gas absorption reagent tester compact and improves its stability, and facilitates the corresponding positioning between the holes through which the first liquid inlet pipe 11 passes, the holes through which the second liquid inlet pipe 12 passes, and the holes through which the first liquid outlet pipe 13 passes, and the corresponding positioning is accurate, so that the air tightness of the gas absorption reagent tester is improved and the installation is convenient.

[0096] A sealing block 34 is embedded between the top of the side wall of the waterproof shell 1 and the top of the side wall of the measuring cup 3 to reinforce the stability of the measuring cup, making the structure of the deoxidation tester more stable. The embedding method of the sealing block 34 adopts a well-known method. The top of the side wall of the waterproof shell 1 is provided with a step for installing the sealing block 34. The sealing block 34 is embedded between the measuring cup 3 and the waterproof shell 1 and is located on the step of the side wall of the waterproof shell 1. The sealing block 34 seals the gap between the top of the measuring cup 3 and the top of the waterproof shell 1, which is beneficial to the stability and firmness of the tester and improves the aesthetics of the tester. The side wall of the waterproof shell 1 is also provided with a vent hole 16 for ventilation between the ventilation overflow pipe 21 and the outside of the waterproof shell 1. The position of the vent hole 16 is higher than the ventilation overflow pipe 21. The setting of the vent hole 16 ensures that the atmospheric pressure of the liquid storage tank 2 is balanced with that of the outside, ensuring the smooth progress of the test.

[0097] Example 3

[0098] like Figure 6 As shown, this embodiment can adopt the cylindrical structure in embodiment 1 or the square structure in embodiment 2. After adopting embodiment 1 or embodiment 2, the difference from the corresponding embodiment structure is that the side wall of the watertight shell 1 is also provided with an air inlet pipe 18 that passes through the side wall of the watertight shell 1 and the side wall of the measuring cup 3 and extends into the measuring cup 3, and the end of the air inlet pipe 18 exposed from the watertight shell 1 is provided with an air inlet valve 181. The maximum scale of the scale line and the volume of the liquid storage tank 2 are 1000mL, which ensures that there is sufficient liquid in the liquid storage tank 2 to flow back to the measuring cup 3.

[0099] The diameter of the overflow pipe 141 is 3mm-5mm. The first liquid inlet pipe 11 and the air inlet pipe 18 are at the same height and are both located above the 1000mL scale value of the scale line. The position of the first liquid inlet pipe 11 is 5mm lower than the position of the support plate 33. A warning line 35 is provided on the side wall of the measuring cup 3, and the warning line 35 is located 5mm below the first liquid inlet pipe 11. A vent pipe 161 is provided on the vent hole 16, and a vent valve 162 is connected to the vent pipe 161. Such a setting allows as much liquid as possible to be input into the measuring cup 3 during the test, and the air in the measuring cup 3 is discharged as much as possible. After the gas to be absorbed is introduced through the air inlet pipe 18, there is sufficient high-concentration gas to be absorbed in the measuring cup 3 for testing, which improves the efficiency of the test and facilitates the gas absorption reagent tester to test gases with a low content in the air, such as carbon dioxide.

[0100] In this embodiment, a carbon dioxide absorbent is taken as an example.

[0101] The test method is as follows:

[0102] (1) The gas absorption reagent tester is placed horizontally, that is, the zero scale 31 of the measuring cup 3 is horizontal, the carbon dioxide absorbent to be measured is placed in the support plate 33, the liquid inlet valve 111, the second liquid outlet valve 171, the vent valve 162 and the airtight valve 321 are opened, the sealing end cover 32, the air inlet valve 181 and the first liquid outlet valve 131 are closed, and liquid paraffin oil is continuously introduced from the first liquid inlet pipe 11; when liquid flows out of the second liquid outlet valve 171, the second liquid outlet valve 171 and the vent valve 162 are closed, and liquid is continuously introduced into the measuring cup through the liquid inlet valve 111. When the liquid level rises to the warning line 35, the liquid introduction is stopped, the liquid inlet valve 111 is closed, the air inlet valve 181 is opened, and carbon dioxide gas is introduced into the measuring cup 3 through the air inlet pipe 18, and the excess gas in the measuring cup 3 is discharged through the airtight valve 321.

[0103] (2) After the carbon dioxide is introduced for 20s-30s, since the air density is less than that of carbon dioxide, the air in the measuring cup 3 is basically exhausted. After the air is basically exhausted, close the airtight valve 321, and open the second liquid outlet valve 171 and the vent valve 162 at the same time, and continue to introduce carbon dioxide. Connect a hose to the end of the second liquid outlet pipe 17 that is exposed from the waterproof shell 1, and the hose is introduced into the collection bottle of liquid paraffin oil to facilitate the recycling of liquid paraffin oil. Here, the hose and the collection bottle of liquid paraffin oil are well-known instruments. When the liquid level in the measuring cup 3 is close to the position of the zero scale 31 by 3mL-5mL, reduce the intake speed of carbon dioxide. When the liquid level in the measuring cup 3 returns to the zero scale, close the intake valve 181. When there is no more liquid flowing out of the second liquid outlet pipe 17, start timing and record the scale value corresponding to the liquid level at this time.

[0104] (3) After a certain period of time, before the liquid level in the measuring cup 3 rises to 1000 mL, the scale value of the liquid level at this time is recorded, and then the measuring cup 3 is ventilated, the second liquid outlet pipe 17 is closed, the air inlet valve 181 is opened, and carbon dioxide is introduced into the measuring cup 3 through the air inlet pipe 18. When the liquid level in the measuring cup 3 is close to the position of the zero scale 31 by 3 mL-5 mL, the air intake speed of carbon dioxide is reduced. When the liquid level in the measuring cup 3 returns to the zero scale, the air inlet valve 181 is closed to end the ventilation.

[0105] (4) When the liquid level in the measuring cup 3 stops rising below 1000 mL, the test is finished. The carbon dioxide absorption amounts recorded during the test are added together to calculate the total carbon dioxide absorption amount of the carbon dioxide absorbent.

[0106] By testing the carbon dioxide absorbent in the manner described above, carbon dioxide can be filled into the measuring cup, and the air in the measuring cup 3 is basically exhausted. The carbon dioxide concentration in the measuring cup 3 is high, avoiding interference from other gases in the air. The testing method is simple, efficient, and has a high accuracy rate.

[0107] The embodiments and drawings described are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made thereto by a person of ordinary skill in the art should be deemed to be within the patent scope of the present invention.

Claims

1. A gas absorption reagent tester, characterized in that: It comprises a vertically arranged water-proof shell and a liquid storage tank embedded in the bottom of the water-proof shell; The top of the liquid storage bin is provided with a ventilation overflow pipe extending vertically upwards, a measuring cup is also vertically installed on the top of the liquid storage bin, the scale line on the measuring cup has a zero scale, the top of the ventilation overflow pipe is higher than the zero scale, the measuring cup is clamped between the side wall of the waterproof shell and the side wall of the ventilation overflow pipe, a supporting plate with fine holes for placing the test agent above the scale line is provided in the measuring cup, an opening is provided on the top of the measuring cup, a sealing end cover is provided at the opening, and an airtight valve is provided on the sealing end cover; An overflow hole is provided at the bottom of the waterproof shell corresponding to the ventilation overflow pipe, an overflow pipe is provided in the overflow hole and extends vertically upward to the ventilation overflow pipe, and the top of the overflow pipe is aligned with the zero scale; A first liquid inlet pipe is sealedly connected to the side wall of the water-proof shell, and the position of the first liquid inlet pipe is higher than the zero scale. The first end of the first liquid inlet pipe passes through the side wall of the measuring cup and extends into the measuring cup, and the second end of the liquid inlet pipe passes through the side wall of the water-proof shell and is provided with a liquid inlet valve. A second liquid inlet pipe for connecting the liquid storage bin and the measuring cup is provided in the water-proof shell, the first end of the second liquid inlet pipe passes through the bottom of the measuring cup and is exposed at the bottom of the measuring cup, the second end of the second liquid inlet pipe passes through the top of the liquid storage bin and extends into the bottom of the liquid storage bin, and a first liquid outlet pipe is provided at the bottom of the side wall of the water-proof shell, the first end of the first liquid outlet pipe passes through the side wall of the liquid storage bin and extends into the bottom of the liquid storage bin, and the second end of the first liquid outlet pipe passes through the bottom of the side wall of the water-proof shell and is provided with a first liquid outlet valve.

2. A gas absorption reagent tester as claimed in claim 1, characterized in that: A first inclined portion is provided at the bottom of the waterproof shell, the ventilation overflow pipe corresponds to the highest position of the first inclined portion up and down, the bottom of the liquid storage tank is inclined corresponding to the first inclined portion, the second end of the second liquid inlet pipe extends into the lowest position of the bottom of the liquid storage tank, the inner side wall of the top of the liquid storage tank is provided with a second inclined portion parallel to the first inclined portion, and the first end of the first liquid outlet pipe passes through the side wall of the liquid storage tank and extends into the lowest position of the bottom of the liquid storage tank.

3. A gas absorption reagent tester as claimed in claim 1, characterized in that: The volume of the measuring cup is greater than or equal to 1000mL, the zero scale is set at a position at or above one-quarter the height of the measuring cup, the maximum scale of the scale line is at least 250mL, the minimum scale of the scale line is set at or above five percent of the height of the measuring cup, the minimum scale is less than or equal to -50mL, and the volume of the liquid storage tank is greater than or equal to 200mL.

4. A gas absorption reagent tester as claimed in claim 3, characterized in that: The watertight shell, the measuring cup and the liquid storage tank are cylindrical, the outer circular side wall of the liquid storage tank is tightly attached to the inner circular side wall of the watertight shell, and the ventilation overflow pipe is against the inner circular side wall of the watertight shell.

5. A gas absorption reagent tester as claimed in claim 3, characterized in that: The watertight shell, the measuring cup, the liquid storage tank and the ventilation overflow pipe are square in shape, the four side walls of the liquid storage tank are tightly fitted with the four side walls of the watertight shell in one-to-one correspondence, three side walls of the ventilation overflow pipe are tightly fitted with three side walls of the watertight shell in one-to-one correspondence, three side walls of the measuring cup are tightly fitted with three side walls of the watertight shell in one-to-one correspondence, and the remaining side wall of the measuring cup is tightly fitted with the remaining side wall of the ventilation overflow pipe.

6. A gas absorption reagent tester as claimed in claim 1, characterized in that: A sealing block is embedded in the gap between the top of the side wall of the water-proof shell and the top of the side wall of the measuring cup to seal the gap between the measuring cup and the water-proof shell. The side wall of the water-proof shell is also provided with a vent hole for ventilation between the ventilation overflow pipe and the outside of the water-proof shell. The position of the vent hole is higher than the ventilation overflow pipe.

7. A gas absorption reagent tester as claimed in claim 6, characterized in that: A water stop plug is also embedded in the bottom of the overflow pipe, and a second liquid outlet pipe is also provided at the bottom of the side wall of the watertight shell, which passes through the side wall of the watertight shell and the side wall of the overflow pipe and extends into the overflow pipe. A second liquid outlet valve is provided at the end of the second liquid outlet pipe exposed from the watertight shell, and the volume of the ventilation overflow pipe above the zero scale is greater than 20mL.

8. A gas absorption reagent tester as claimed in claim 7, characterized in that: The side wall of the watertight shell is also provided with an air inlet pipe which passes through the side wall of the watertight shell and the side wall of the measuring cup and extends into the measuring cup. An air inlet valve is provided at the end of the air inlet pipe exposed from the watertight shell. The scale value of the scale line and the volume of the liquid storage tank are at least 1000mL. The diameter of the overflow pipe is 3mm-5mm. The position of the first liquid inlet pipe is higher than the top of the scale line. The position of the air inlet pipe is equal to or higher than the position of the first liquid inlet pipe. The side wall of the measuring cup is provided with a warning line for controlling the maximum liquid inlet amount at a position 1mm-20mm below the liquid inlet pipe. A ventilation pipe is provided on the vent hole. A ventilation valve is connected to the ventilation pipe. The gap between the top of the side wall of the measuring cup and the top of the side wall of the watertight shell is sealed by the sealing block.

9. A method for testing a gas absorption reagent tester as claimed in claim 1, characterized in that: The steps include: (1) First, the liquid level in the measuring cup is adjusted to zero for the first time, the first liquid outlet valve is closed, the liquid inlet valve and the airtight valve are opened, and liquid is introduced into the measuring cup and the liquid storage tank from the first liquid inlet pipe. When the liquid storage tank is full of liquid and the liquid flows out from the overflow pipe, the liquid introduction is stopped and the liquid inlet valve is closed; when no more liquid flows out of the overflow pipe and the liquid level in the measuring cup is stable and stays at the zero scale, the first adjustment of the liquid level in the measuring cup to zero is completed; (2) Add the deoxidizer to be tested into the support plate, cover the sealing end cover, close the airtight valve, and then start the test. During the test, the deoxidizer absorbs the oxygen in the measuring cup, so that the pressure in the measuring cup decreases. Under the action of atmospheric pressure, the liquid in the liquid storage tank is replenished into the measuring cup through the second liquid inlet pipe, so that the liquid level in the measuring cup rises. (3) Record data at regular intervals, and determine whether ventilation is required based on the approximate oxygen absorption of the deoxidizer and the air volume in the measuring cup during the test; if the residual gas volume in the measuring cup is sufficient and the oxygen content contained is sufficient for the deoxidizer to be tested to absorb, then ventilation is not required; if the residual gas in the measuring cup does not contain enough oxygen or it is impossible to accurately determine whether the oxygen content is sufficient, ventilation is performed during the test. Each time data recording is completed, the airtight valve is opened for ventilation. During ventilation, the ventilation is completed when the liquid level stabilizes and returns to the zero scale, and then the airtight valve is closed and the test is continued. When the liquid level in the measuring cup no longer changes, that is, when the increase in oxygen absorption is 0, the test is completed.

10. A method for testing a gas absorption reagent tester as claimed in claim 8, characterized in that: The steps include: (1) The gas absorption reagent tester is placed horizontally, that is, the zero scale of the measuring cup is horizontal, and the gas absorption reagent to be measured is first placed in the support plate, wherein the density of the gas absorbent is greater than that of air; then the liquid inlet valve, the second liquid outlet valve, the vent valve and the airtight valve are opened, and the sealing end cover, the air inlet valve and the first liquid outlet valve are closed, and a liquid that is immiscible with the gas to be absorbed is continuously introduced from the first liquid inlet pipe; when liquid flows out of the second liquid outlet valve, the second liquid outlet valve and the vent valve are closed, and liquid is continuously introduced into the measuring cup through the liquid inlet valve. When the liquid level rises to the warning line position, the liquid introduction is stopped, and the liquid inlet valve is closed at this time, and the air inlet valve is opened, and the gas to be absorbed is introduced into the measuring cup through the air inlet pipe, and the excess gas in the measuring cup is discharged through the airtight valve; (2) After the gas to be absorbed has been introduced for 20s-30s, close the airtight valve, and open the second liquid outlet valve and the vent valve at the same time, continue to introduce the gas to be absorbed through the air inlet pipe, and connect a hose to the end of the second liquid outlet pipe exposed from the waterproof shell, and the hose is introduced into a collection bottle for collecting liquid in the tester; when the liquid level in the measuring cup is close to the zero scale position of 3mL-5mL, reduce the air intake speed of the gas to be absorbed, and when the liquid level in the measuring cup returns to the zero scale, close the air inlet valve, and start timing when no liquid flows out of the second liquid outlet pipe, and record the scale value corresponding to the liquid level at this time; (3) After a certain period of time, before the liquid level in the measuring cup rises to 1000 mL, record the scale value of the liquid level at this time, then ventilate the measuring cup, close the second liquid outlet pipe, open the air inlet valve, and input the gas to be absorbed into the measuring cup through the air inlet pipe. When the liquid level in the measuring cup is close to the zero scale position of 3 mL-5 mL, reduce the air intake speed of the gas to be absorbed. When the liquid level in the measuring cup returns to the zero scale, close the air inlet valve to end the ventilation; (4) When the liquid level in the measuring cup stops at a position below 1000 mL and does not rise any more, the test is finished. The absorption amounts of the gas to be absorbed recorded during the test are added together to calculate the total absorption amount of the gas to be absorbed by the gas absorption reagent.

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