A high-precision replacement device for water-soluble gas

Abstract

The utility model discloses a kind of high-precision replacement devices for water-soluble gas, including reaction vessel, gas metering device for detecting gas volume, replacement container is connected between reaction vessel and gas metering device, reaction vessel is also provided with stirring motor, can drive stirring shaft to stir in reaction vessel, accelerate the reaction in reaction vessel, reaction vessel, replacement container and gas metering device are sequentially connected in series by flexible conduit, and the bottle mouth of reaction vessel and replacement container is equipped with double-channel sealing plug, and only one U-shaped pipeline intercommunication between the two cavities of replacement container, replacement liquid difficultly soluble with the gas to be measured is filled in the first cavity of replacement container, controllable valve is equipped on another passage of reaction vessel.Effective solution is solved in traditional detection method and the measurement error problem caused by gas dissolution or corrosion, and detection precision is significantly improved simultaneously.

Description

Technical Field

[0001] This utility model relates to the technical field of gas detection, specifically to a high-precision replacement device for water-soluble gases. Background Technology

[0002] Traditional gas volume detection methods often employ direct introduction into the metering device or displacement by water displacement. The former is prone to inaccurate readings and equipment damage due to gas dissolution or corrosion; the latter is affected by liquid level differences and may compress the gas, leading to significant errors, especially in the case of trace gas production. Existing technologies struggle to balance accuracy and equipment protection, necessitating urgent improvements. Summary of the Invention

[0003] In order to solve one or more technical problems existing in the prior art, the purpose of this application is to provide a high-precision replacement device for water-soluble gases, which is suitable for the volume measurement of water-soluble or corrosive gases in scenarios such as biological fermentation and chemical reaction. It effectively solves the measurement error problem caused by gas dissolution or corrosion in traditional detection methods, and at the same time significantly improves the detection accuracy.

[0004] To solve the aforementioned technical problems, this application adopts the following technical solution:

[0005] A high-precision displacement device for water-soluble gases includes a reaction container and a gas metering device for detecting gas volume. A displacement container is connected between the reaction container and the gas metering device. The reaction container, displacement container, and gas metering device are connected in series via flexible conduits. Both the reaction container and the displacement container have dual-channel sealing plugs at their openings. The displacement container is filled with two cavities connected by a U-shaped pipe. The first cavity of the displacement container is filled with a displacement liquid that is poorly soluble in the gas to be tested. A controllable valve is provided on the other channel of the reaction container. A one-way valve is also provided between the displacement container and the gas metering device.

[0006] Preferably, it also includes a constant liquid level water tank, the top of which is provided with two fixing holes for fixing the replacement container. The constant liquid level water tank is provided with a balancing liquid so that the bottom of the replacement container is suspended below the liquid surface, and the bottle mouth is fixed to the outside of the fixing holes.

[0007] Preferably, the body of the replacement container is a glass container, and the filling height of the replacement fluid does not exceed 2 / 3 of the total volume of the bottle.

[0008] Preferably, it also includes a negative pressure generator, which is connected to the reaction vessel via a flexible conduit with the controllable valve, for drawing the replacement fluid in the second chamber of the replacement vessel back to the first chamber of the replacement vessel.

[0009] Preferably, the negative pressure generator is a medical syringe.

[0010] Preferably, the container also includes a stirring motor and a stirring shaft. The stirring motor drives the stirring shaft to stir the solution in the reaction vessel, which can accelerate the reaction in the reaction vessel.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] Two-stage displacement design: The gas generated by the reaction vessel first pushes the difficult-to-displace liquid in the first chamber of the displacement vessel into the second chamber, and the displaced air enters the metering device, avoiding direct contact between the gas and the metering unit.

[0013] Liquid level self-balancing system: The displacement container is suspended in a constant liquid level tank and automatically adjusts its height as the liquid moves, eliminating pressure interference caused by liquid level difference.

[0014] Quick reset function: Liquid is returned by suction using a negative pressure generator, making it easy to reuse. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram showing the state of the displacement container as the liquid level changes in this utility model;

[0017] In the diagram: 1. Constant level water tank; 2. Equilibrium liquid; 3. Reaction vessel; 4. Stirring shaft; 5. Stirring motor; 6. Negative pressure generator; 7. Controllable valve; 8. Flexible conduit; 9. Displacement vessel; 10. Dual-channel sealing plug; 11. Glass partition; 12. Glass U-tube; 13. One-way valve; 14. Gas metering device; 15. Fixing hole; 16. Displacement liquid. Detailed Implementation

[0018] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0019] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0020] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, without limiting the number of objects; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

[0022] like Figure 1 and Figure 2 As shown, a high-precision displacement device for water-soluble gases includes a reaction container 3 and a gas metering device 14 for detecting gas volume. A displacement container 9 is connected between the reaction container 3 and the gas metering device 14. The reaction container 3, displacement container 9, and gas metering device 14 are connected in series via flexible conduits 8. Both the reaction container 3 and displacement container 9 have double-channel sealing plugs 10 at their openings. The displacement container 9 has two cavities connected by a glass U-shaped tube 12. The first cavity of the displacement container 9 is filled with a displacement liquid 16 that is poorly soluble in the gas to be tested. A controllable valve 7 is provided on the other channel of the reaction container 3. A one-way valve 13 is also provided between the displacement container 9 and the gas metering device 14. The device also includes a stirring motor 5 and a stirring shaft 4. The stirring motor 5 drives the stirring shaft 4 to stir the solution in the reaction container 3, thereby accelerating the reaction rate.

[0023] When detecting water-soluble gases, first connect the stirring motor 5 and the stirring shaft 4 with a coupling, then assemble the reaction vessel 3 and the stirring motor 5 into one unit. At the same time, block the other lower extension hole of the reaction vessel 3 through the controllable valve 7. When it is necessary to detect the volume of gas produced by fermentation, open the double-channel sealing plug 10, put the material to be fermented into the reaction vessel 3, and put the displacement liquid 16, which is not easily soluble in the measured gas, into the first cavity of the displacement vessel 9. After sealing, close the controllable valve 7. The water-soluble gas or corrosive gas produced by fermentation enters the first cavity of the displacement vessel 9 through the flexible conduit 8. After the gas pressure is generated in the first cavity of the displacement vessel 9, the detection gas displaces the displacement liquid 16 in the first cavity of the displacement vessel 9. The displaced displacement liquid 16 is pressed into the second cavity of the displacement vessel 9 along the glass U-shaped tube 12, and the air is displaced by the displacement liquid 16 flowing into the second cavity of the displacement vessel 9. The air flows into the gas metering device 14 along the flexible conduit 8 for volume detection and calculation. Thus, high-precision detection of water-soluble gases is achieved through the displacement method. During the detection process, the problem of corrosive effects caused by the gas in the reaction vessel 3 directly entering the gas metering device 14 can be avoided. At the same time, the problem of water-soluble gas being partially dissolved due to contact with the water replacement liquid of the detection device, which affects the accuracy, can be avoided, thus enabling high-precision detection of water-soluble gas.

[0024] A further improvement includes a constant level water tank 1, the top of which is provided with two fixing holes 15 for fixing the replacement container 9. The constant level water tank 1 is provided with a balancing liquid 2, so that the bottom of the replacement container is suspended below the liquid surface, and the bottle mouth is fixed to the outside of the fixing holes 15.

[0025] When detecting water-soluble gases using the displacement method, a liquid level difference exists between the first chamber of displacement container 9, which contains displacement liquid 16, and the second chamber, which contains air. The greater the liquid level difference, the greater the pressure impact on the required displacement gas. Especially when the amount of water-soluble gas is small or the liquid level in the second chamber of displacement container 9 is greater than that in the first chamber, the required gas pressure is higher, causing some water-soluble gas to be compressed, ultimately leading to an imbalance in displacement and affecting measurement accuracy. Therefore, to ensure high accuracy, displacement container 9 is placed in a constant-level water tank 1, and a balancing liquid 2 (usually water) is placed in the tank. The depth and buoyancy of the balancing liquid 2 ensure that the portion of displacement container 9 containing displacement liquid 16 initially sinks into the balancing liquid 2, with the bottom not reaching the bottom and the opening positioned within the fixing hole 15. While the bottom of the second chamber of the displacement container 9 is filled with sediment, during displacement, the controllable valve 7 is closed. As the gas generated in the reaction vessel 3 pushes the displacement liquid 16 in the first chamber of the displacement container 9 to flow, the two chambers of the displacement container 9 can move freely up and down in the constant-level water tank 1 with fixing holes 15, ensuring that the liquid levels in the two chambers of the displacement container 9 are consistent, thus preventing the reaction vessel 3 from being affected by liquid pressure. As the displacement liquid 16 changes, the displacement container 9 can automatically float and sink using the equilibrium liquid 2, thereby solving the problem of gas compression due to liquid level differences during displacement, resulting in higher detection accuracy.

[0026] A further improvement is made in that the body of the replacement container 9 is a glass container, and the filling height of the replacement liquid 16 does not exceed 2 / 3 of the total volume of the bottle. This makes it more sensitive during replacement. Furthermore, the bottle opening of the replacement container 9 is located outside the fixing hole 15, and the upper part of the bottle is inside the fixing hole 15, ensuring that it floats vertically during sinking and floating, preventing excessive tilting of the bottle that could affect detection accuracy. The height of the replacement liquid 16 in the first chamber of the replacement container 9 is no higher than the narrowed area of ​​the bottle opening, generally around 2 / 3 of the bottle body. For example, when detecting CO2, the first chamber of the replacement container 9 is filled with NaHCO3 replacement liquid 16.

[0027] A further improvement based on any of the above technical solutions is that it also includes a negative pressure generator 6, which is connected to the reaction vessel 3 via a flexible conduit 8 with the controllable valve 7, and is used to aspirate the replacement fluid 16 in the second cavity of the replacement vessel 9 back to the first cavity of the replacement vessel 9; the negative pressure generator 6 is a medical syringe.

[0028] When the test is completed and the replacement fluid 16 displaced from the first chamber of the replacement container 9 needs to be reset, the replacement fluid 16 in the second chamber of the replacement container 9 can also be returned to the first chamber of the replacement container 9 without opening the cap, through the negative pressure generator 6. Specifically, the flexible conduit 8 connected to the gas metering device 14 at the top is removed, the controllable valve 7 is connected with a syringe, the controllable valve 7 is opened and the gas is drawn out with the syringe, thereby drawing out the gas in the first chamber of the replacement container 9. The replacement fluid 16 in the second chamber of the replacement container 9 is restored to its initial state through negative pressure, and the second chamber of the replacement container 9 is refilled with air until the liquid is reset. Then the controllable valve 7 is closed, so that the flexible conduit 8 between the bottle mouth of the second chamber of the replacement container 9 and the gas metering device 14 can be reconnected and the device can be reused.

[0029] A further improvement is made so that, in order to ensure the recovery effect of the replacement fluid 16, a certain height of replacement fluid 16 can also be placed in the second chamber of the replacement container 9 in the initial state, ensuring that the lower end of the glass U-shaped tube 12 in the second chamber of the replacement container 9 is located in the replacement fluid 16. During reflux, the problem of air being drawn out and the bottom not being completely evacuated can be avoided. Especially after forming a scale on the bottle, the operation is more convenient.

[0030] The specific assembly and operation procedures are as follows:

[0031] 1. Install the replacement container (9) into the fixing hole (15) of the constant liquid level water tank (1) and inject the balancing liquid (2) until it is suspended at the bottom.

[0032] 2. Add replacement fluid (16) (such as NaHCO3 replacement fluid when detecting CO2) to the first chamber of the replacement container (9), with the liquid level reaching 2 / 3 of the bottle body.

[0033] 3. The reaction vessel (3), the displacement vessel (9), and the gas metering device (14) are connected in series via a flexible conduit (8).

[0034] 4. After the reaction begins, the gas pushes the displacement liquid (16) into the second chamber of the displacement container (9), and the displaced air enters the metering device (14) to complete the measurement.

[0035] 5. After the test is completed, use the negative pressure generator (6) to aspirate and return the replacement fluid (16) to the first chamber of the replacement container (9) and reset the device.

[0036] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. A high-precision displacement device for water-soluble gases, comprising a reaction vessel (3) and a gas metering device (14) for detecting gas volume, characterized in that: A displacement container (9) is connected between the reaction container (3) and the gas metering device (14). The reaction container (3), the displacement container (9) and the gas metering device (14) are connected in series by a flexible conduit (8). The bottle mouths of the reaction container (3) and the displacement container (9) are equipped with double-channel sealing plugs (10). The displacement container (9) has only two cavities connected by a U-shaped pipe (12). The first cavity of the displacement container (9) is filled with a displacement liquid (16) that is insoluble with the gas to be tested. The other channel of the reaction container (3) is equipped with a controllable valve (7). A one-way valve (13) is also provided between the displacement container (9) and the gas metering device (14).

2. The high-precision replacement device for water-soluble gases according to claim 1, characterized in that: It also includes a constant level water tank (1), the top of which is provided with two fixing holes (15) for fixing the replacement container (9). The constant level water tank (1) is provided with a balancing liquid (2) so that the bottom of the replacement container (9) is suspended below the liquid surface and the bottle mouth is fixed to the outside of the fixing hole (15).

3. The high-precision replacement device for water-soluble gases according to claim 1, characterized in that: The body of the replacement container (9) is a glass container, and the filling height of the replacement liquid (16) does not exceed 2 / 3 of the total volume of the bottle.

4. A high-precision replacement device for water-soluble gases according to any one of claims 1 to 3, characterized in that: It also includes a negative pressure generator (6), which is connected to the reaction vessel (3) via a flexible conduit (8) with the controllable valve (7) for drawing the replacement fluid (16) in the second chamber of the replacement vessel (9) back to the first chamber of the replacement vessel (9).

5. A high-precision replacement device for water-soluble gases according to claim 4, characterized in that: The negative pressure generator (6) is a medical syringe.

6. A high-precision replacement device for water-soluble gases according to any one of claims 1 to 3, characterized in that: It also includes a stirring motor (5) and a stirring shaft (4). The stirring motor (5) drives the stirring shaft (4) to stir the solution in the reaction vessel (3) to accelerate the reaction rate.

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