A fluid phase equilibrium measurement cavity integrating filling and sampling

Abstract

This utility model relates to a fluid phase equilibrium measurement chamber integrating filling and sampling, comprising: a measurement chamber body, a single capillary tube, and a single interface passing through the measurement chamber body. The capillary tube is used simultaneously for filling the chamber with fluid samples and collecting samples from different liquid levels. A magnetic field driving device includes a magnet fixed to the capillary tube and an electromagnetic coil wound around the outside of the measurement chamber body. By controlling the current of the electromagnetic coil to adjust the magnetic field strength, the magnet drives the capillary tube to move within the measurement chamber body, positioning the capillary port at the target liquid level. By placing the single capillary tube through the single interface of the measurement chamber body, the number of interfaces is significantly reduced. With the cooperation of the magnet and the electromagnetic coil in the magnetic field driving device, the capillary tube can be moved by controlling the current to adjust the magnetic field strength, achieving precise positioning of the sampling port at different liquid levels, and avoiding the increase in volume and sealing problems caused by additional mechanical structures.

Description

Technical Field

[0001] This utility model relates to the technical field of fluid phase balance measurement equipment, specifically to a fluid phase balance measurement cavity that integrates filling and sampling. Background Technology

[0002] Phase equilibrium is an important property of fluids and plays a crucial role in chemical process design. Accurate measurement of fluid phase equilibrium data is the foundation for ensuring the rationality and economy of chemical process design.

[0003] Currently, traditional fluid phase equilibrium measurement chambers typically have one sample filling port and three or more capillary sampling ports to facilitate sample filling and sampling at different locations. However, this multi-port design has significant drawbacks: firstly, the numerous ports result in a large redundant volume within the measurement chamber, and this excess space can affect the establishment and maintenance of fluid phase equilibrium, thus interfering with the accuracy of the measurement results; secondly, the increased number of ports makes sealing the measurement chamber more difficult and also causes significant heat leakage, especially at low temperatures where cooling energy is extremely valuable. Significant heat leakage makes it difficult to reach the preset temperature or maintain stable temperature control within the measurement chamber, further reducing measurement accuracy. Therefore, a novel fluid phase equilibrium measurement chamber is urgently needed to address these issues. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a fluid phase equilibrium measurement cavity that integrates filling and sampling, aiming to solve the problems existing in the background technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a fluid phase equilibrium measurement chamber integrating filling and sampling, characterized in that it includes: a measurement chamber body, a single capillary tube, a unique interface passing through the measurement chamber body, the capillary tube being used simultaneously for filling the chamber with fluid samples and collecting samples from different liquid levels, and a magnetic field driving device, including a magnet fixed on the capillary tube and an electromagnetic coil wound around the outside of the measurement chamber body, the magnetic field strength being adjusted by controlling the current of the electromagnetic coil, driving the magnet to move the capillary tube within the measurement chamber body, so that the capillary tube port is positioned at the target liquid level height.

[0006] Furthermore, the capillary is made of a corrosion-resistant metal material.

[0007] Furthermore, the magnet is a permanent magnet.

[0008] Furthermore, the permanent magnet is a neodymium iron boron magnet.

[0009] Furthermore, the capillary is coiled and fixed to the surface of the magnet.

[0010] Furthermore, the electromagnetic coil is made of enameled wire wound together.

[0011] Furthermore, the electromagnetic coil has 300-5000 turns and the enameled wire has a diameter of 0.1-1mm.

[0012] Furthermore, the inner diameter of the capillary is 0.3-3 mm, and the outer diameter is 1-4 mm.

[0013] Furthermore, the magnet has a length of 3-30 mm and a diameter of 2-20 mm.

[0014] This invention describes an integrated fluid phase equilibrium measurement chamber for filling and sampling. Its advantages include: by inserting a single capillary tube through a single interface of the measurement chamber body, it simultaneously achieves sample filling and sampling at different liquid levels, significantly reducing the number of interfaces and fundamentally lowering the redundant volume of the measurement chamber. This avoids interference from excess space with the fluid phase equilibrium state, facilitating the stable establishment and maintenance of the phase equilibrium state. The reduced number of interfaces also simplifies the sealing process, reduces the risk of heat leakage, and makes the internal temperature of the measurement chamber more stable, significantly improving measurement accuracy. Furthermore, by utilizing the cooperation of the magnet and electromagnetic coil in the magnetic field drive device, the capillary tube can be moved by controlling the current to adjust the magnetic field strength, achieving precise positioning of the sampling port at different liquid levels. This replaces the traditional multi-tube fixing or mechanical adjustment method, not only simplifying operation and increasing flexibility but also avoiding the increased volume and sealing problems caused by additional mechanical structures. This further optimizes measurement efficiency and reliability, effectively solving the problems of low measurement accuracy and complex operation caused by the multi-interface design of traditional measurement chambers. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the integrated filling and sampling measurement cavity structure according to an embodiment of the present invention;

[0016] Figure 2 This is a three-dimensional diagram of the phase balance measurement cavity according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached drawings: 1. Measuring chamber body; 11. Receptacle; 12. Filling and sampling integrated tube interface; 13. Standard thermometer socket; 2. Capillary tube; 3. Magnet; 4. Electromagnetic coil; 5. Viewing window; 6. Supporting spring. Detailed Implementation

[0018] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0019] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] To further illustrate the principle and structure of this utility model, the preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] like Figure 1-2 As shown, the fluid phase equilibrium measurement chamber integrating filling and sampling of this utility model comprises three parts: a measurement chamber body 1, a single capillary tube 2, and a magnetic field driving device. The measurement chamber body 1 is a stainless steel chamber with an overall sealed structure. Its interior is the main phase equilibrium measurement space, with a gas phase region formed above it. A viewing window 5 is provided on the side of the chamber, which can be used to observe the phase changes and liquid level of the fluid inside the chamber in real time. A standard thermometer socket 13 is also provided on the chamber for installing a temperature measuring device to monitor the temperature inside the chamber.

[0022] The outer surface of the aforementioned measuring cavity body 1 extends outward in its own radial direction to form an extension structure. The extension structure is integrally formed with the measuring cavity body 1, and an independent accommodating cavity 11 is formed inside. The accommodating cavity 11 is connected to the internal space of the measuring cavity body 1 to form a continuous fluid channel. The extension structure can also be regarded as part of the measuring cavity body 1.

[0023] The measuring chamber body 1 is equipped with a unique integrated filling and sampling tube interface 12. A single capillary tube 2 extends from one end through the integrated filling and sampling tube interface 12 into the measuring chamber body 1, while the other end is located in the accommodating cavity 11, forming a "spanning cavity" distribution. The capillary tube 2 is made of corrosion-resistant metal material (stainless steel or other corrosion-resistant metal material), with an inner diameter of 0.3-3 mm and an outer diameter of 1-4 mm. The length is determined according to the dimensions of the measuring chamber body 1 and the extension structure. The middle section of the capillary tube 2 is coiled and fixed to the surface of a small magnet 3. This magnet 3 is a neodymium iron boron permanent magnet 3, with a length of 3-30 mm and a diameter of 2-20 mm. It has moderate magnetic strength, which can respond to magnetic field drive without disturbing the fluid phase equilibrium state.

[0024] The electromagnetic coil 4 in the magnetic field drive device is not directly wound around the measuring cavity body 1, but is tightly wound around the outer surface of the extension structure. The electromagnetic coil 4 is made of enameled wire with a diameter of 0.1-1mm, with 300-5000 turns. The winding density is uniformly set according to the circumference of the extension structure, and the two ends of the coil are connected to an external adjustable power supply.

[0025] A support spring 6 is also provided inside the accommodating cavity 11. One end of the support spring 6 is connected to the top of the magnet 3, and the other end of the support spring 6 is connected to the top of the accommodating cavity 11. Under the action of the spring force, it maintains the stability of the initial position.

[0026] Work process:

[0027] During sample filling, fluid is injected through capillary tube 2, and the sample flows into the measuring chamber body 1 through the accommodating cavity 11 until the preset liquid level is reached (observable through the viewing window 5). When sampling at different liquid levels is required, different currents are applied to the electromagnetic coil 4 on the extension structure by adjusting the external adjustable power supply. The coil generates a magnetic field of corresponding strength, which acts on the neodymium iron boron magnet with capillary tube 2 coiled around it, causing the magnet and capillary tube 2 to move up and down within the connected measuring chamber body 1 and accommodating cavity 11. When moving downwards, the support spring 6 is compressed, and when moving upwards, the support spring 6 rebounds and resets. The elastic deformation of the support spring 6 buffers the impact force during the movement, allowing the capillary tube 2 port to be accurately positioned at the target liquid level height, thus completing the sampling operation.

[0028] In another embodiment, the radial extension length of the extension structure can be adjusted according to measurement requirements, and its cross-section can be set to be circular or square, as long as it can meet the space requirements of the accommodating cavity 11 and the winding stability of the electromagnetic coil 4.

[0029] Compared with existing technologies, this invention integrates filling and sampling functions into a single capillary tube 2, retaining only a single interface, significantly reducing the redundant volume of the measurement chamber. This facilitates the establishment and maintenance of fluid phase equilibrium, while also reducing the difficulty of the sealing process, minimizing heat leakage, and making the temperature inside the chamber more stable, thus significantly improving measurement accuracy. Furthermore, the magnetic field generated by the electromagnetic coil 4 drives the movement of the magnet 3 and capillary tube 2. Simultaneously, the magnetic field generated by the electromagnetic coil 4 drives the movement of the magnet 3 and capillary tube 2, replacing the complex transmission structure required for traditional mechanical adjustment, further reducing the overall size of the device and further facilitating the establishment and maintenance of fluid phase equilibrium. The permanent magnet support spring 6 ensures the positional stability of the magnet 3 and capillary tube 2 in the non-working state and avoids rigid collisions during movement through flexible buffering, further ensuring the stability of the measurement environment and sampling accuracy.

[0030] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A fluid phase equilibrium measurement cell integrated with sample charging, the cell comprising: include: Measuring the cavity body; A single capillary tube, inserted through the only interface on the measuring chamber body, is used simultaneously to fill the chamber with fluid samples and to collect samples from different liquid levels. The magnetic field driving device includes a magnet fixed on a capillary tube and an electromagnetic coil wound around the outside of the measuring cavity body. By controlling the current of the electromagnetic coil to adjust the magnetic field strength, the magnet is driven to move the capillary tube within the measuring chamber, positioning the capillary tube port at the target liquid level.

2. The integrated fluid phase equilibrium measurement cell for sampling and charging according to claim 1, wherein, The capillary is made of a corrosion-resistant metal material.

3. The integrated fluid phase equilibrium measurement cell for sampling and charging according to claim 1, wherein, The magnet is a permanent magnet.

4. The integrated fluid phase equilibrium measurement cell for sampling and charging according to claim 3, wherein, The permanent magnet is a neodymium iron boron magnet.

5. The integrated fluid phase equilibrium measurement cell for sampling and charging according to claim 1, wherein, The capillary tube is coiled and fixed to the surface of the magnet.

6. The integrated fluid phase equilibrium measurement cell for sampling and charging according to claim 1, wherein, The electromagnetic coil is made of enameled wire.

7. The fluid phase equilibrium measurement chamber integrating filling and sampling according to claim 6, characterized in that, The electromagnetic coil has 300-5000 turns and the enameled wire has a diameter of 0.1-1mm.

8. The integrated fluid phase equilibrium measurement cell for sampling and charging according to claim 1, wherein, The capillary has an inner diameter of 0.3-3 mm and an outer diameter of 1-4 mm.

9. The integrated fluid phase equilibrium measurement cell for sampling and charging according to claim 1, wherein, The magnet has a length of 3-30mm and a diameter of 2-20mm.

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