Gas-liquid mixing device for blood gas quality control product

Abstract

The application provides a gas-liquid mixing device for blood gas quality control products, and belongs to the technical field of gas-liquid mixing. The gas-liquid mixing device for blood gas quality control products comprises a mixing tank, a float is vertically movably arranged in the mixing tank, a ventilation pipe is arranged through the float, a liquid injection pipe is arranged below the mixing tank, a gas conveying pipe is arranged below the mixing tank, an exhaust pipe and a circulating mechanism are arranged above the mixing tank, the circulating mechanism is communicated with the gas conveying pipe, and the ventilation pipe is in clutch communication with the circulating mechanism. The application has the following effects: the float automatically floats up with the injection of the solution, and residual air is automatically exhausted; after the solution is filled, the ventilation pipe is communicated with the circulating mechanism, the pressure can be increased to promote the fusion of the gas, the gas can be continuously circulated in the solution, the contact area of the gas and the solution is increased, and the fusion effect is further improved.

Description

Technical Field

[0001] This application relates to the field of gas-liquid mixing technology, and more specifically, to a gas-liquid mixing device for blood gas quality control products. Background Technology

[0002] As a quality control product used in conjunction with a blood gas analyzer, a crucial step in its production process is to uniformly mix CO2 and O2 in a buffer solution according to the expected gas concentration requirements and then seal them together in an airtight glass reaction bottle or reagent package. Current gas-liquid mixing devices for blood gas quality control products connect the gas and buffer solution to separate pipelines, directly filling the reaction bottle for sealing. However, products produced using this method are prone to air being trapped during the sealing process, affecting the reaction results.

[0003] In response, Chinese patent application number CN202022576983.7 discloses a gas-liquid mixing device for blood gas quality control products. This scheme mainly involves injecting a solution into a reaction bottle, and then injecting gas into the solution through an air inlet pipe to achieve gas-liquid mixing. After the gas reaches the gas outlet chamber, the gas pushes the liquid blocking block outward, and the exhaust hole then exhausts gas outward. After the gas filling is completed, the reaction bottle is automatically sealed to prevent external air from entering and to ensure the purity of the reaction.

[0004] However, in the process of implementing the technical solutions in the embodiments of this application, the inventors of this utility model discovered that the above-mentioned technology has at least the following technical problems:

[0005] 1. Before the solution is injected, there is a certain amount of gas in the reaction flask. After the gas is injected, the previous gas needs to be completely expelled in order to ensure the purity of the reaction gas. Therefore, the injection of air needs to be carried out for a period of time to completely expel the original air before sealing and reaction can be carried out, which wastes reaction gas and reaction time.

[0006] 2. After the reaction flask is sealed, it is necessary to wait for the gas to mix with the solution. However, after the gas overflows from the solution, there is a clear stratification with the solution, and the contact area is small, which affects the mixing effect. Utility Model Content

[0007] To overcome the above deficiencies, this application provides a gas-liquid mixing device for blood gas quality control products, which aims to improve the problems mentioned in the background art.

[0008] This application provides a gas-liquid mixing device for blood gas quality control products, including a mixing tank, a float valve vertically movably disposed inside the mixing tank, a vent pipe passing through the float valve, a liquid injection pipe disposed below the mixing tank, a gas delivery pipe disposed below the mixing tank, an exhaust pipe and a circulation mechanism disposed above the mixing tank, the circulation mechanism being connected to the gas delivery pipe, and the vent pipe being disengaged from the circulation mechanism.

[0009] In one specific implementation, a drain pipe is provided below the mixing tank.

[0010] In the above implementation process, a sensor is installed in the mixing tank to monitor the concentration of oxygen and carbon dioxide dissolved in the liquid. When the concentration reaches the standard, the drain pipe is opened to release the solution into the bottling equipment. The sensor in the mixing tank is a standard practice in the field and will not be described in detail here.

[0011] In one specific implementation, a limiting ring is provided on the inner wall of the mixing tank, and the float plug is in movable contact with the limiting ring.

[0012] In the above process, before the solution is injected into the injection tube, the float is placed on the limiting ring and there is a small amount of air inside. As the solution is injected, this residual air is discharged from the vent hole until the solution fills the internal space and floats up. At this time, the liquid level of the solution is located inside the vent tube.

[0013] In one specific implementation, an aeration pipe is provided at the inner end of the gas supply pipe.

[0014] In the above process, the aeration pipe is a concentric tube with multiple air holes on its surface. By using aeration, the contact area between the gas and the solution is increased, thereby improving the mixing speed.

[0015] In one specific implementation, the circulation mechanism includes a stop and a return pipe. The stop is fixedly connected to the upper end of the mixing tank, one end of the return pipe is fixedly connected to the stop, and the upper end of the vent pipe abuts against the end face of the return pipe.

[0016] In the above process, the injection pipe continuously injects solution, causing the float to rise as the liquid level rises until the exhaust pipe reaches the seat. At this point, the vent pipe and the return pipe are connected, and the valve on the injection pipe is closed. At this time, gas can continue to be input to increase the internal gas pressure and increase the speed at which the gas dissolves in the liquid.

[0017] In one specific implementation, a solenoid valve is provided on the gas supply pipe, and the other end of the return gas pipe is fixedly connected to the outlet of the solenoid valve. The circulation mechanism also includes a circulation pump, which is connected in series on the return gas pipe.

[0018] In the above process, a pressure sensor is also installed in the mixing tank. When the gas pressure reaches the specified value, the gas input stops, the solenoid valve closes, and the reaction area is completely sealed. The internal gas is circulated by the circulation pump and injected into the solution through the aeration pipe. The gas passes through the solution and overflows from the vent pipe, and then is reinjected into the aeration pipe by the circulation pump along the return pipe, realizing gas circulation. This effectively increases the contact area between the gas and the solution and improves the dissolution rate. It should be noted that the circulation pump is a Roots-type gas pump with frequency conversion control. When injecting gas, the circulation pump rotates slowly, allowing a small amount of gas to enter the solution area through the return pipe, while most of the gas enters the solution area through the aeration pipe. This ensures that the gas in the return pipe is pure. When the gas pressure reaches the specified value, the circulation pump reverses to realize internal gas circulation.

[0019] In one specific implementation, sealing rings are provided at both the upper and lower ends of the float.

[0020] In the above process, the sealing ring of the float plug is used to prevent the solution from entering between the float plug and the inner wall of the mixing tank, thereby reducing liquid residue. The outer end of the sealing ring is a conical surface, which has a scraping effect.

[0021] In one specific implementation, the bottom surface of the float is conical.

[0022] In the above process, when the solution level rises, the residual air can be collected along the conical ground to the vent pipe and discharged, thus avoiding dead air zones.

[0023] Compared with the prior art, the beneficial effects of this application are: the float automatically rises with the solution injection, automatically purging residual air; after the solution is filled, the vent pipe is connected to the circulation mechanism, which can increase the pressure to promote gas integration, and also allow the gas to circulate continuously in the solution, increasing the contact area between the gas and the solution, and further improving the dissolution effect. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a gas-liquid mixing device for blood quality control products provided in the embodiments of this application;

[0026] Figure 2 A schematic diagram of the liquid injection and gas delivery states provided for an embodiment of this application;

[0027] Figure 3A schematic diagram of the gas circulation state provided for an embodiment of this application.

[0028] In the diagram: 10-mixing tank; 11-injection pipe; 12-exhaust pipe; 13-drain pipe; 14-limiting ring; 20-float plug; 21-vent pipe; 22-sealing ring; 30-circulation mechanism; 31-support seat; 32-return pipe; 33-circulation pump; 40-gas supply pipe; 41-aeration pipe; 42-solenoid valve. Detailed Implementation

[0029] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0030] Please see Figures 1-3 This application provides a gas-liquid mixing device for blood gas quality control products, including a mixing tank 10. A float 20 is vertically movably disposed inside the mixing tank 10, and a vent pipe 21 is disposed through the float 20. A liquid injection pipe 11 is disposed below the mixing tank 10, and a gas delivery pipe 40 is disposed below the mixing tank 10. An exhaust pipe 12 and a circulation mechanism 30 are disposed above the mixing tank 10. The circulation mechanism 30 is connected to the gas delivery pipe 40, and the vent pipe 21 is connected to the circulation mechanism 30 in a disengaging manner. The float 20 automatically rises as the solution is injected, automatically purging residual air. After the solution is full, the vent pipe 21 connects to the circulation mechanism 30, which can pressurize the solution to promote gas incorporation and allow the gas to circulate continuously within the solution, increasing the contact area between the gas and the solution and further improving the dissolution effect.

[0031] Please see Figures 1-3 A drain pipe 13 is provided below the mixing tank 10. Sensors are installed inside the mixing tank 10 to monitor the concentration of oxygen and carbon dioxide dissolved in the liquid. When the concentration reaches the target, the drain pipe 13 opens to release the solution into the bottling equipment. The sensors in the mixing tank 10 are standard practice in the art and will not be described in detail here.

[0032] Please see Figures 1-3 A limiting ring 14 is provided on the inner wall of the mixing tank 10, and the float plug 20 is in contact with the limiting ring 14. Before the solution is injected into the injection pipe 11, the float plug 20 rests on the limiting ring 14 and contains a small amount of air. As the solution is injected, this residual air is discharged from the vent hole until the solution fills the internal space, causing the float plug 20 to float up. At this time, the liquid level of the solution is located in the vent pipe 21.

[0033] Please see Figures 1-3 An aeration pipe 41 is provided at the inner end of the gas supply pipe 40. The aeration pipe 41 is a concentric tube with multiple air holes on its surface. By using aeration, the contact area between the gas and the solution is increased, thereby improving the mixing speed.

[0034] Please see Figures 1-3The circulation mechanism 30 includes a base 31 and a return air pipe 32. The base 31 is fixedly connected to the upper end of the mixing tank 10, and one end of the return air pipe 32 is fixedly connected to the base 31. The upper end of the vent pipe 21 abuts against the end face of the return air pipe 32. The injection pipe 11 continuously injects solution, causing the float 20 to rise as the liquid level rises until the exhaust pipe 12 abuts against the base 31. At this time, the vent pipe 21 and the return air pipe 32 are connected, and the valve on the injection pipe 11 is closed. At this time, gas can continue to be input to increase the internal gas pressure and increase the speed at which the gas dissolves in the liquid.

[0035] Please see Figures 1-3 The gas supply pipe 40 is equipped with a solenoid valve 42, and the other end of the return pipe 32 is fixedly connected to the outlet of the solenoid valve 42. The circulation mechanism 30 also includes a circulation pump 33, which is connected in series on the return pipe 32. A pressure sensor is also installed in the mixing tank 10. When the gas pressure reaches the specified value, the gas input stops, the solenoid valve 42 closes, and the reaction area is completely sealed. The internal gas is circulated by the circulation pump 33 and injected into the solution through the aeration pipe 41. The gas passes through the solution and overflows from the vent pipe 21. Then, it is reinjected into the aeration pipe 41 by the circulation pump 33 along the return pipe 32, realizing gas circulation. This effectively increases the contact area between the gas and the solution and improves the dissolution rate. It should be noted that the circulation pump 33 is a Roots-type air pump with frequency conversion control. Before the exhaust pipe 12 reaches the seat 31, the solenoid valve 42 opens and gas is supplied. The circulation pump 33 rotates slowly, allowing a small amount of gas to enter the solution area through the return pipe 32, while most of the gas enters the solution area through the aeration pipe 41. This ensures that the gas in the return pipe 32 is pure. When the exhaust pipe 12 reaches the seat 31, gas supply continues until the gas pressure is reached. Then, the solenoid valve 42 closes, and the circulation pump 33 reverses, realizing internal gas circulation.

[0036] Please see Figures 1-3 The float 20 is equipped with sealing rings 22 at both its upper and lower ends. The sealing rings 22 of the float 20 are used to prevent the solution from entering between the float 20 and the inner wall of the mixing tank 10, thereby reducing liquid residue. The outer end of the sealing ring 22 is a conical surface, which has a scraping effect.

[0037] Please see Figures 1-3 The bottom surface of the float 20 is conical. When the solution level rises, the residual air can be collected along the conical surface to the vent pipe 21 and discharged, avoiding dead air zones.

[0038] The working principle of this gas-liquid mixing device for blood gas quality control is as follows: Before the solution is injected into the injection pipe 11, the hollow float 20 rests on the limiting ring 14, containing a small amount of air. As the solution is injected, this residual air is discharged through the vent hole until the solution fills the internal space, causing the float 20 to float up. At this point, the liquid level is located within the vent pipe 21. The injection pipe 11 continues to inject solution, causing the float 20 to rise as the liquid level increases, until the exhaust pipe 12 reaches the stop seat 31. At this point, the vent pipe 21 connects with the return pipe 32, and the valve on the injection pipe 11 closes. Gas can then continue to be input to increase the internal gas pressure and accelerate the dissolution of the gas in the liquid. When the gas pressure reaches a specified value... When the gas input stops, the solenoid valve 42 closes, and the reaction area is completely sealed. The internal gas is circulated by the circulation pump 33 and injected into the solution through the aeration pipe 41. The gas passes through the solution and overflows from the vent pipe 21, and then is reinjected into the aeration pipe 41 by the circulation pump 33 through the return pipe 32, realizing gas circulation. This effectively increases the contact area between the gas and the solution, improving the dissolution rate. In summary, the float 20 automatically rises with the injection of solution, automatically removing residual air. After the solution is full, the vent pipe 21 is connected to the circulation mechanism 30, which can increase the pressure to promote gas integration and also allow the gas to circulate continuously in the solution, increasing the contact area between the gas and the solution and further improving the dissolution effect.

[0039] The solenoid valve 42, sensor, circulating pump 33, and other actuators and detection devices involved in this application are automatically controlled by a Siemens S7-1200 series PLC. The patent specification fully discloses its control logic; those skilled in the art can implement the corresponding control program using ladder diagrams or structured text programming languages ​​based on the logical relationships. The related equipment is connected according to the IEC 61131-2 electrical standard, which is a common connection technology in the field of automation; therefore, redundant descriptions are not provided.

[0040] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, improvements, or equivalent substitutions made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. A gas-liquid mixing device for blood gas quality control products, characterized in that, The system includes a mixing tank (10), a float (20) is vertically movable inside the mixing tank (10), a vent pipe (21) is provided through the float (20), an injection pipe (11) is provided below the mixing tank (10), a gas supply pipe (40) is provided below the mixing tank (10), an exhaust pipe (12) and a circulation mechanism (30) are provided above the mixing tank (10), the circulation mechanism (30) is connected to the gas supply pipe (40), and the vent pipe (21) is connected to the circulation mechanism (30) in a clutch-type connection.

2. The gas-liquid mixing device for blood gas quality control products according to claim 1, characterized in that, A drain pipe (13) is provided below the mixing tank (10).

3. The gas-liquid mixing device for blood gas quality control products according to claim 2, characterized in that, The mixing tank (10) is provided with a limiting ring (14) on its inner wall, and the float (20) is in contact with the limiting ring (14).

4. A gas-liquid mixing device for blood gas quality control products according to claim 3, characterized in that, An aeration pipe (41) is provided at the inner end of the gas supply pipe (40).

5. A gas-liquid mixing device for blood gas quality control products according to claim 4, characterized in that, The circulation mechanism (30) includes a stop (31) and a return pipe (32). The stop (31) is fixedly connected to the upper end of the mixing tank (10). One end of the return pipe (32) is fixedly connected to the stop (31). The upper end of the vent pipe (21) abuts against the end face of the return pipe (32).

6. A gas-liquid mixing device for blood gas quality control products according to claim 5, characterized in that, The gas supply pipe (40) is equipped with a solenoid valve (42), and the other end of the return gas pipe (32) is fixedly connected to the outlet of the solenoid valve (42). The circulation mechanism (30) also includes a circulation pump (33), which is connected in series on the return gas pipe (32).

7. A gas-liquid mixing device for blood gas quality control products according to claim 6, characterized in that, The upper and lower ends of the float (20) are provided with sealing rings (22).

8. A gas-liquid mixing device for blood gas quality control products according to claim 7, characterized in that, The bottom surface of the float (20) is conical.

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