Steam-water sampling water sample flow and temperature double-parameter automatic control device

Abstract

The invention relates to the technical field of industrial automation, and discloses a steam-water sampling water sample flow and temperature double-parameter automatic control device which comprises a first vertical through pipe and a second vertical through pipe which are parallel and spaced, and the first vertical through pipe is connected between a pipeline outlet of a pressure reducing valve in a steam-water sampling pipeline system and a pipeline inlet of cooling equipment. The second vertical through pipe is connected to a discharging branch pipe of the cooling equipment in parallel. The flow regulating valve structure is arranged in the first vertical through pipe and comprises an adjustable valve chip set and an outer driving assembly; the intelligent material driving mechanism is arranged in the second vertical through pipe and serves as a temperature feedback control point, the intelligent material driving mechanism comprises an LCE intelligent material part and a mechanical transmission mechanism, and the mechanical transmission mechanism is connected between the LCE intelligent material part and an outer driving assembly in the flow adjusting valve structure to form a feedback transmission link; flow and temperature double-parameter automatic cooperative control is achieved, response is fast, water sample flow and temperature can be stabilized, water sample abnormity is avoided, and detection reliability is improved.

Description

Technical Field

[0001] This invention relates to the field of industrial automation technology, specifically to an automatic control device for both flow rate and temperature of water samples taken from steam and water. Background Technology

[0002] Steam and water sampling is a core component in ensuring equipment safety and process stability in fields such as thermal power generation and chemical production. It involves collecting steam and water samples from the system, analyzing them to obtain water quality indicators (such as dissolved oxygen, pH, and conductivity), and providing data support for equipment corrosion prevention, scale prevention, and process parameter optimization. During steam and water sampling, the flow rate and temperature of the water sample are key parameters determining the accuracy of the test results. Flow rate directly affects the residence time of the water sample in the cooling equipment, while temperature is related to the stability of water quality indicators. A precise match between these two factors is necessary to ensure reliable test data. For example, if the sampling flow rate does not match the heat exchange capacity of the cooling equipment, the water sample temperature will deviate from the standard testing range, leading to problems such as dissolved oxygen loss and pH fluctuations, resulting in distorted test results. Furthermore, abnormal flow rate can also cause pipeline blockage or water sample retention, affecting the continuous operation of the sampling system. Therefore, coordinated control of the flow rate and temperature of the steam and water samples is a necessary prerequisite for ensuring efficient and accurate steam and water sampling.

[0003] Currently, in the industrial sector, the flow and temperature control of steam and water sampling systems mostly adopts a traditional mode of independent adjustment plus manual intervention, which has significant limitations. Flow regulation usually relies on manual valves or a single electric regulating valve, requiring maintenance personnel to make periodic adjustments based on offline temperature monitoring data. This adjustment is highly lagging and difficult to adapt to changes in steam and water parameters caused by system load fluctuations. Temperature control mainly relies on the fixed power operation of cooling equipment, lacking a linkage mechanism with flow parameters. When the flow rate changes abruptly, the cooling equipment cannot match the heat exchange demand in time, easily leading to temperature exceeding the limit. This separate control mode not only increases manual maintenance costs but also suffers from low control accuracy. Too low a flow rate can easily cause changes in water sample composition and pipeline blockage, while too high a flow rate can lead to insufficient heat exchange, causing the water sample temperature to exceed the suitable operating range of the measuring instruments (usually 25±5℃), affecting detection accuracy and potentially damaging online measuring instruments. In addition, some control schemes that use a single sensor, although achieving a certain degree of automation, are susceptible to corrosion and scaling of the steam and water medium, which leads to distortion of the detection signal and further reduces the reliability of the control system. This makes it difficult to meet the high precision and high stability requirements of modern industry for steam and water sampling. Therefore, we propose an automatic control device for steam and water sampling with two parameters: water sample flow rate and temperature. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an automatic control device for both the flow rate and temperature of water samples taken from steam and water, thus solving the aforementioned problems.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: an automatic control device for dual parameters of water sample flow rate and temperature in steam water sampling, comprising: Vertical pipe 1 and vertical pipe 2 are parallel and spaced apart. Vertical pipe 1 is rigidly connected between the outlet of the pressure reducing valve and the inlet of the cooling equipment pipeline in the steam and water sampling pipeline system through flanges at both ends. Vertical pipe 2 is connected in parallel to the discharge branch pipe of the cooling equipment through flanges at both ends. A flow regulating valve structure is installed in the vertical pipe. The flow regulating valve structure includes an adjustable valve chip set and an external drive assembly. The external drive assembly is drivenly connected to the adjustable valve chip set for synchronously adjusting the gap between the valve chip sets. The intelligent material driving mechanism installed in the second vertical pipe serves as a temperature feedback control point. The intelligent material driving mechanism includes an LCE intelligent material component and a mechanical transmission mechanism. The mechanical transmission mechanism is connected between the LCE intelligent material component and the external driving component in the flow regulating valve structure, forming a feedback transmission link.

[0006] Preferably, the LCE smart material component includes a horizontal support plate, a limiting horizontal shaft, and an LCE membrane assembly. Two symmetrical horizontal support plates are fixedly installed on the inner walls of both sides of the vertical tube II, and a notch is opened at the middle of the end sides of the two horizontal support plates that are close to each other. The LCE membrane assemblies are fixedly bonded to both horizontal support plates through the notches. The two sets of LCE membrane assemblies are parallel and aligned. Two limiting horizontal shafts perpendicular to the horizontal support plates are also fixedly connected between the inner walls of both sides of the vertical tube II. The two limiting horizontal shafts pass through the notches of the two horizontal support plates, and the two sets of LCE membrane assemblies are slidably sleeved with the two limiting horizontal shafts. The two limiting horizontal shafts are located on the deformation axis of the LCE membrane assembly.

[0007] Preferably, the LCE film assembly is a thermotropic main-chain liquid crystal elastomer, and its surface is coated with a nanoscale silicon dioxide protective layer.

[0008] Preferably, the mechanical transmission mechanism includes a transmission rod and a lever arm. In the second vertical pipe, the horizontal plate, the limiting horizontal shaft, and the LCE membrane group are all horizontal, and the direction of the deformation axis of the LCE membrane group is perpendicular to the first vertical pipe. The side wall of the second vertical pipe facing the first vertical pipe is provided with a sealing hole flush with the LCE membrane group. The two sets of LCE membrane groups are fixedly connected to the end sides facing the first vertical pipe with transmission rods, and the transmission rods intersect perpendicularly with the vertical axis of the second vertical pipe. The other end of the transmission rod extends through the sealing hole and is hinged to an inclined lever arm. The free end of the lever arm is connected to the external drive component in the flow regulating valve structure.

[0009] Preferably, the adjustable valve chip assembly includes a cross connector, a rotating shaft, and an arc-shaped valve piece. Both ends of the central shaft are fixedly sleeved with cross connectors, which are "+" shaped. The central shaft is fixedly connected to the middle of the vertical pipe through the two cross connectors, and the central shaft is coaxial with the vertical pipe. Multiple rotating shafts are rotatably connected to the side wall at the midpoint of the central shaft. The multiple rotating shafts are circumferentially distributed and perpendicular to the vertical pipe and the central shaft. Each rotating shaft is fixedly sleeved with a fan-shaped arc-shaped valve piece. The connection between the rotating shaft and the arc-shaped valve piece is located in the middle of the arc-shaped valve piece. Multiple sets of arc-shaped valve pieces can be synchronously rotated into a closed circumference that fits the internal cavity of the vertical pipe.

[0010] Preferably, the number of the rotating shaft rods and the arc valve plate blocks are the same and at least four, and the included angle between two adjacent rotating shaft rods is the same, and the arc of the arc valve plate block is set to be the same as the included angle between two adjacent rotating shaft rods.

[0011] Preferably, the external drive assembly includes a drive ring, a rotating block, a ball joint rod, a connecting rod, a ball-and-socket cap, and a grooved ball retainer. A sealing hole is provided on the outer wall of the first vertical tube corresponding to the axis of each rotating shaft rod, and each rotating shaft rod extends through the sealing hole into the outer wall. The drive ring is coaxially sleeved on the outside of the first vertical tube and located on one side of the rotating shaft rod. The drive ring is flush with the lever arm rod, and the free end of the lever arm rod is hinged to one side of the drive ring. A rotating block perpendicular to the rotating shaft rod is fixedly connected to the end of each rotating shaft rod, and the rotating block faces the drive ring. A ball-head rod is fixedly connected to the end of the lever facing the drive ring, and the end of the ball-head rod is spherical. A spherical notch cap is rotatably sleeved on the spherical end of the ball-head rod. A spherical notch groove is opened on one side of each group of rotating levers on the ring end wall of the rotating lever. A grooved ball is rotatably locked in the spherical notch groove. Each group of grooved balls corresponds one-to-one with the spherical notch cap connected to the end of each group of rotating levers. An inclined connecting rod is fixedly connected between the corresponding spherical notch cap and the grooved ball. A ball joint structure is formed between the ball-head rod and the connecting rod, as well as between the grooved ball and the drive ring.

[0012] Preferably, the center point of the drive ring, the midpoint of the line connecting the two sets of LCE membrane modules, and the axis of the transmission rod are located on the same horizontal line.

[0013] Preferably, symmetrical bent bases are fixedly installed on the outer walls of both sides of the vertical pipe. The bent bases have an L-shaped cross-section. A bearing ring groove is opened on the ring end face of the drive ring away from the rotating block. An integrated limiting connector is fixedly installed at the top of the vertical part of both bent bases. The limiting connector is slidably engaged in the bearing ring groove.

[0014] Preferably, the cross-section of the limiting connector and the bearing ring groove is T-shaped, and the outer surface of the limiting connector is inlaid with a ball rotor that fits against the inner wall of the bearing ring groove.

[0015] Compared with the prior art, the present invention provides an automatic control device for both the flow rate and temperature of water samples taken from carbonated beverages, which has the following beneficial effects: I. Precise and coordinated dual-parameter control ensures the reliability of soft drink sampling and testing. By leveraging the direct temperature feedback from LCE smart materials and combining it with the automatic flow regulation via a mechanical transmission link, precise linkage control of water sample flow and temperature is achieved. This avoids problems such as excessively low flow or water sample stagnation, as well as insufficient heat exchange, excessively high temperature, and instrument damage caused by excessively high flow. It stabilizes the water sample temperature at 25±5℃ and the flow rate within the suitable industrial range of 50-100mL / min, providing reliable media conditions for steam and water sampling and testing. Breaking through the limitations of traditional electronically controlled valves that rely on sensors and algorithms, this system directly converts temperature signals into mechanical driving force through LCE materials, rigidly linking them with the valve gap adjustment mechanism to form a closed-loop control chain from temperature sensing to deformation drive to flow regulation. This eliminates the need for external power supplies and complex control circuits, simplifying the system architecture and improving reliability.

[0016] II. Application of LCE smart materials to achieve sensorless, high-efficiency temperature feedback Thermotropic main-chain liquid crystal elastomer film is used as the temperature sensing element. Taking advantage of its inherent deformation characteristics of contraction when cold and elongation when hot, the temperature signal is directly converted into mechanical displacement. No additional temperature sensor or electronic control module is required, which simplifies the system structure, reduces the risk of electronic component failure, and achieves a fast response from temperature to mechanical action with a response time of milliseconds, thus improving the real-time performance of the control.

[0017] III. Mechanical transmission link design to ensure stable and high-precision power transmission. In the transmission mechanism, the limiting horizontal shaft strictly constrains the deformation direction of the LCE membrane module, so that the temperature deformation is accurately converted into linear displacement; the eccentric hinge design of the lever arm and the drive ring efficiently realizes the conversion of linear displacement into rotational motion; the multiple ball joint structure of the external drive component can adapt to the multi-angle force transmission when the drive ring rotates, ensuring that multiple arc valve plates rotate synchronously and uniformly, with high flow regulation accuracy, no jamming in the transmission process, and strong long-term operational stability.

[0018] IV. Wide range of applications, suitable for various soft drink sampling scenarios The flow rate adjustment range of this device can be flexibly designed by adjusting the number and curvature of the arc valve plates and the transmission ratio of the drive ring. It can adapt to the different needs of different scale steam and water sampling systems for flow rate and temperature control, and has good versatility and scalability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional schematic diagram of vertical pipe one and vertical pipe two of the present invention; Figure 3 This is a schematic diagram of two cross-sections of the vertical pipe of the present invention; Figure 4 for Figure 2 A magnified view of part A in the diagram; Figure 5 for Figure 2 A magnified view of section B in the diagram; Figure 6 This is a schematic diagram of the flow regulating valve structure of the present invention; Figure 7 This is a schematic diagram of the driving ring structure of the present invention; Figure 8 This is a cross-sectional schematic diagram of the driving ring of the present invention.

[0020] In the diagram: 1. Vertical pipe one; 2. Vertical pipe two; 3. Horizontal support plate; 4. Limiting horizontal shaft; 5. LCE membrane module; 6. Transmission rod; 7. Lever arm rod; 8. Sealing hole; 9. Central shaft; 10. Cross connector; 11. Rotating shaft rod; 12. Arc valve plate; 13. Drive ring; 14. Rotating lever; 15. Ball head rod; 16. Connecting rod; 17. Ball notch cap; 18. Groove ball catcher; 19. Ball notch groove; 20. Bending base; 21. Limiting connector; 22. Bearing ring groove. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figure 1-8 An automatic control device for dual parameters of water sample flow rate and temperature in carbonated beverage sampling, comprising: Vertical pipe 1 and vertical pipe 2 are parallel and spaced apart. Vertical pipe 1 is rigidly connected between the outlet of the pressure reducing valve and the inlet of the cooling equipment pipeline in the steam and water sampling pipeline system through flanges at both ends. Vertical pipe 2 is connected in parallel to the discharge branch pipe of the cooling equipment through flanges at both ends. A flow regulating valve structure is installed in the vertical pipe 1. The flow regulating valve structure includes an adjustable valve chip set and an external drive assembly. The external drive assembly is drivenly connected to the adjustable valve chip set for synchronously adjusting the gap between the valve chip sets. The intelligent material driving mechanism installed in the vertical pipe 2 serves as a temperature feedback control point. The intelligent material driving mechanism includes an LCE intelligent material component and a mechanical transmission mechanism. The mechanical transmission mechanism is connected between the LCE intelligent material component and the external driving component in the flow regulating valve structure, forming a feedback transmission link.

[0023] Furthermore, the LCE smart material component includes a horizontal carrier plate 3, a limiting horizontal shaft 4, and an LCE membrane assembly 5. Two symmetrical horizontal carrier plates 3 are fixedly installed on the inner walls of both sides of the vertical tube 2, and notches are opened at the middle of the ends of the two horizontal carrier plates 3 that are close to each other. The LCE membrane assemblies 5 are fixedly bonded to both horizontal carrier plates 3 through the notches. The two LCE membrane assemblies 5 are parallel and aligned. Two limiting horizontal shafts 4 perpendicular to the horizontal carrier plates 3 are also fixedly connected between the inner walls of both sides of the vertical tube 2, and the two limiting horizontal shafts 4 pass through the horizontal carrier plates 3 respectively. The two transverse support plates 3 on both sides have notches, and the two sets of LCE membrane modules 5 are respectively slidably sleeved with two limiting transverse shafts 4. The two limiting transverse shafts 4 are located on the deformation axis of the LCE membrane module 5. The transverse support plates 3 on both sides of the inner wall of the vertical pipe 2 are rigidly fixed by welding or bolts to provide horizontal support for the LCE membrane module 5. The two limiting transverse shafts 4 are perpendicular to the transverse support plates 3 and welded to the inner wall of the vertical pipe 2 at both ends. The notches of the LCE membrane module 5 are sleeved on the limiting transverse shafts 4, so that the LCE membrane module 5 can only slide along the axial direction of the limiting transverse shafts 4. When the LCE membrane module 5 deforms due to temperature, the limiting transverse shafts 4 restrict its radial wobble, ensuring that the deformation is completely transmitted to the transmission rod 6 along the axial direction. Through rigid support and axial limiting, the thermal deformation of the LCE membrane module 5 is accurately converted into linear displacement, avoiding deformation dispersion or directional deviation, and providing a stable and predictable input signal for subsequent transmission.

[0024] Furthermore, LCE membrane module 5 uses a thermotropic main-chain liquid crystal elastomer, and its surface is coated with a nano-scale silica protective layer. In this dual-parameter control device for soda sampling, the selection of LCE (liquid crystal elastomer) material must simultaneously meet the requirements of temperature response sensitivity, deformation driving force, water resistance, mechanical durability, and compatibility with the mechanical structure. Considering the core requirements of the device (precise deformation transmission within the 15-40℃ temperature range, driving valve adjustment), the specific type and structural design are as follows: I. LCE Material Type Selection: Thermotropic Main-Chain Liquid Crystal Elastomer (Polysiloxane) Core selection criteria: The temperature change of the matching soda sampling system is purely thermally driven (without solvent intervention, the water sample is a dispersed phase rather than a solvent), so a thermotropic LCE should be selected, and a lyotropic LCE should be excluded (which depends on solvent molecule penetration and is easily affected by water sample composition).

[0025] Mechanical performance adaptability devices require LCE materials to provide sufficient driving force during deformation, so main chain type LCE is selected: its liquid crystal units directly participate in the formation of the molecular main chain, and the three-dimensional network formed after cross-linking has higher mechanical strength, greater elongation at break, and more stable deformation recovery (residual deformation ≤5% after 5000 cycles of deformation), which is better than side chain type LCE (side chain liquid crystal units are easy to fall off due to external force, resulting in poor long-term stability).

[0026] The environmentally resistant optimized matrix uses a polysiloxane backbone (replacing the traditional polyolefin or polyester backbone). The Si-O bonds in its molecular chain are resistant to water and mild acid and alkali corrosion (suitable for working conditions with water sample pH 4-10), and it is not easily embrittled at low temperatures (it still maintains elasticity at -20℃). It does not undergo thermal oxidative degradation at high temperatures (60℃), which solves the problem of easy hydrolysis of traditional LCE in humid environments.

[0027] Precise temperature response range control is achieved by introducing cholesterol ester liquid crystal units (with an adjustable phase transition temperature range of 10-50℃) through molecular design, and doping with 5-8% cyanobiphenyl liquid crystals (to reduce the phase transition enthalpy). The clearing point of LCE (the temperature at which the liquid crystal phase completely transforms into the isotropic phase) is set at 30℃, and the glass transition temperature is set at 15℃. This ensures that the deformation changes linearly with temperature within the 15-30℃ range (5% deformation rate at 20℃ and 15% deformation rate at 30℃), perfectly covering the temperature control threshold of the device (20℃ low-temperature critical point and 30℃ high-temperature critical point).

[0028] II. LCE Material Structure Design: Unidirectional Orientation Thin Film Structure (including gradient cross-linking layer) Mechanical stretching and orientation (stretching ratio 3:1) is used to orient the liquid crystal cells along the length of the film (the orientation degree is verified to be ≥90% by polarizing microscope), ensuring that the deformation is stretched and contracted in a single direction (length direction) when the temperature changes (avoiding transmission deviation caused by lateral twisting), which is completely matched with the linear push and pull requirements of the transmission rod.

[0029] Surface low cross-linking layer: cross-linking density 0.5 mol% (cross-linking agent is diisocyanate), reduces surface hardness and enhances adhesion to the inner wall of the bypass pipe (achieves gapless contact through high-temperature resistant adhesive to ensure temperature conduction efficiency).

[0030] Core high cross-linking layer: cross-linking density 1.5 mol%, improving overall mechanical strength and ensuring stable tensile / thrust output during deformation.

[0031] The gradient crosslinking design is achieved through stepwise UV curing (low-dose curing of the surface layer first, and high-dose curing of the core layer), which ensures both the sensitivity of temperature sensing (rapid response of the surface layer) and the stability of the driving force (fatigue resistance of the core layer).

[0032] Surface-deposited SiO2 nanofilm: forms a physical barrier to prevent trace ions in the water sample from penetrating into the LCE and causing swelling, while also improving surface wear resistance.

[0033] The deformation of thermotropic main-chain LCEs is linearly correlated with temperature in the 15-30℃ range (R0). 2 =0.99), with a lag time of <3s, ensuring that the temperature signal is transmitted to the flow regulation mechanism without delay.

[0034] The directional deformation of the unidirectionally oriented film is perfectly matched with the linear motion of the transmission rod. The gradient cross-linking structure balances the sensing sensitivity and driving force output, solving the problem of force transmission loss when soft materials drive hard structures.

[0035] The combination of polysiloxane matrix and SiO2 coating enables the material to be recycled ≥10,000 times in the humid and slightly corrosive environment of soda sampling, meeting the innovative requirement of recyclability.

[0036] Furthermore, the mechanical transmission mechanism includes a transmission rod 6 and a lever arm 7. In the second vertical pipe 2, the horizontal plate 3, the limiting horizontal shaft 4, and the LCE membrane group 5 are all horizontal, and the direction of the deformation axis of the LCE membrane group 5 is perpendicular to the first vertical pipe 1. The side wall of the second vertical pipe 2 facing the first vertical pipe 1 is provided with a sealing hole 8 that is flush with the LCE membrane group 5. The two sets of LCE membrane groups 5 are fixedly connected to the end sides facing the first vertical pipe 1 with the transmission rod 6, and the transmission rod 6 intersects the vertical axis of the second vertical pipe 2 perpendicularly. The other end of the transmission rod 6 extends through the sealing hole 8 and is hinged to an inclined lever arm 7. The free end of the lever arm 7 is connected to the external drive component in the flow regulating valve structure. The transmission rod 6 and the LCE membrane group 5 are fixed by rigid bonding or bolts. The end of the transmission rod 6 is hinged to the lever arm 7 through a hinge shaft, and the other end of the lever arm 7 is eccentrically hinged to the ring wall of the drive ring 13. When the transmission rod 6 is axially displaced, the lever arm 7 swings around the hinge point, causing the drive ring 13 to rotate around the axis of the vertical pipe 1. The eccentric hinge structure converts linear displacement into rotational motion, realizing the conversion of the motion form of the drive ring rotation caused by temperature displacement, and providing power input for flow regulation.

[0037] Furthermore, the adjustable valve chip assembly includes a cross connector 10, a rotating shaft 11, and an arc-shaped valve piece 12. Both ends of the central shaft 9 are fixedly sleeved with cross connectors 10, which are "+" shaped. The central shaft 9 is fixedly connected to the middle of the vertical pipe 1 via the two cross connectors 10, and the central shaft 9 is coaxial with the vertical pipe 1. Multiple rotating shafts 11 are rotatably connected to the side wall at the midpoint of the central shaft 9. These rotating shafts 11 are circumferentially distributed and perpendicular to the vertical pipe 1 and the central shaft 9. Each rotating shaft 11 is fixedly sleeved with a fan-shaped arc piece. The connection between the valve plate 12, the rotating shaft 11, and the arc-shaped valve plate 12 is located in the middle of the arc-shaped valve plate 12. Multiple sets of arc-shaped valve plates 12 can rotate synchronously to form a closed circumference that fits the internal cavity of the vertical pipe 1. The cross connectors 10 at both ends of the central shaft 9 are fixed by welding or keying. The four end arms of the cross connectors 10 are welded to the inner wall of the vertical pipe 1, so that the central shaft 9 is coaxially fixed in the middle of the vertical pipe 1. The rotating shaft 11 is rotatably connected to the central shaft 9 through bearings. The arc-shaped valve plate 12 is fixed to the rotating shaft 11 by keying or welding, and sealing strips are attached to the edges of the valve plates. When the rotating shaft 11 rotates, the arc-shaped valve plate 12 rotates synchronously. The gap between adjacent valve plates increases or decreases with the rotation angle, adjusting the flow area of ​​the vertical pipe 1.

[0038] Furthermore, the number of rotating shafts 11 and arc valve plates 12 is the same and at least four, and the included angle between two adjacent rotating shafts 11 is the same. The curvature of the arc valve plates 12 is set to be the same as the included angle between two adjacent rotating shafts 11. When four rotating shafts 11 and arc valve plates 12 are used, the included angle between adjacent rotating shafts 11 is 90°, and the curvature of the arc valve plates 12 is also designed to be 90°. When rotating, they can be spliced ​​into a complete circumference or form four sets of fan-shaped gaps. If the number is increased to six or eight, the included angle between adjacent shafts and the curvature of the valve plates decrease synchronously, the gradient of gap adjustment is more refined, the accuracy of flow regulation is higher, and the linearity is better, which can meet the strict requirements for flow accuracy in industrial steam and water sampling.

[0039] Furthermore, the external drive assembly includes a drive ring 13, a rotating block 14, a ball-head rod 15, a connecting rod 16, a ball-end cap 17, and a grooved ball catch 18. A sealing hole 8 is provided on the outer wall of the vertical tube 1, corresponding to the axis of each rotating shaft 11, and each rotating shaft 11 extends through the sealing hole 8 into the outer wall. The drive ring 13 is coaxially sleeved on the outside of the vertical tube 1 and located on one side of the rotating shaft 11. The drive ring 13 is flush with the lever arm 7, and the free end of the lever arm 7 is hinged to one side of the drive ring 13. A rotating block 14 perpendicular to the rotating shaft 11 is fixedly connected to the end of each rotating shaft 11, and the rotating block 14 faces the drive ring 13. A ball-head rod 15 is fixedly connected to the end of the rotating block 14 facing the drive ring 13, and the end of the ball-head rod 15 is spherical. The spherical end of the ball-head rod 15 is rotatably sleeved with the ball-end cap 17. Each rotating block 14 has a ball notch groove 19 on one side of its annular end wall, and a ball notch 18 is rotatably engaged in the ball notch groove 19. Each ball notch 18 corresponds one-to-one with a ball notch cap 17 connected to the end of each rotating block 14. An inclined connecting rod 16 is fixedly connected between the corresponding ball notch cap 17 and the ball notch 18. A ball joint structure is formed between the ball head rod 15 and the connecting rod 16, as well as between the ball notch 18 and the drive ring 13. The drive ring 13 is made of stainless steel, and its inner wall is fitted with the outer wall of the vertical tube 1 through a clearance fit. The rotating block 14 is connected to the rotating shaft 11 by welding or keying. The ball head rod 15 at its end is rotatably engaged with the ball notch 17. The ball notch 18 is embedded in the ball notch groove 19 of the drive ring 13 and welded to the ball notch cap 17 through the connecting rod 16 to form multiple ball joint transmission chains. When the drive ring 13 rotates, the ball notch groove 19 drives the groove to hold the ball 18, which in turn pulls the ball head rod 15 through the connecting rod 16 and the ball notch cap 17, causing the rotating block 14 to drive the rotating shaft rod 11 to rotate synchronously. The ball joint structure is adapted to the multi-angle force transmission when the drive ring rotates, ensuring that the rotation angle of each rotating shaft rod 11 is consistent, and realizing the synchronous and uniform adjustment of the arc valve plate 12.

[0040] Furthermore, the center point of the drive ring 13, the midpoint of the line connecting the two sets of LCE membrane modules 5, and the axis of the transmission rod 6 are all on the same horizontal line. This arrangement ensures that the hinge points at both ends of the lever arm 7, the force application points of the transmission rod 6 and the drive ring 13 form an isosceles triangle structure. When the transmission rod 6 is axially displaced, the force applied by the lever arm 7 to the drive ring 13 is always perpendicular to the tangential direction of the drive ring. This ensures uniform force on the drive ring, avoids rotational jamming or localized wear caused by eccentricity, improves transmission efficiency, and allows even minute deformations of the LCE membrane module 5 to be accurately converted into rotational motion of the drive ring, ensuring the sensitivity of flow regulation.

[0041] Furthermore, symmetrically shaped bent bases 20 are fixedly installed on the outer walls of both sides of the vertical pipe 1. The bent base 20 has an L-shaped cross-section. A bearing ring groove 22 is opened on the ring end face of the drive ring 13 away from the rotating block 14. An integrated limiting connector 21 is fixedly installed at the top of the vertical part of both bent bases 20. The limiting connector 21 is slidably engaged in the bearing ring groove 22. The cross-sections of the limiting connector 21 and the bearing ring groove 22 are T-shaped. A ball rotor that fits against the inner wall of the bearing ring groove 22 is embedded in the outer surface of the limiting connector 21. The bent base 20 is fixed to the outer wall of the vertical pipe 1 by welding. The limiting connector 21 at the top of its vertical part is embedded in the bearing ring groove 22 of the drive ring 13. The ball rotor on the outer surface of the limiting connector 21 rolls in contact with the inner wall of the bearing ring groove 22. When the drive ring 13 rotates, the limiting connector 21 slides in the bearing ring groove 22, and the ball rotor converts sliding friction into rolling friction. The T-shaped fit structure restricts the axial movement of the drive ring 13, ensuring that it rotates only around the axis of the vertical tube 1; the ball rotor greatly reduces the rotational friction resistance, making the drive ring rotate more smoothly and consume less power, while reducing component wear and extending the maintenance cycle of the device.

[0042] Working Principle: First, the device is laid out and installed in the steam-water sampling pipeline system. Vertical pipe 1 is rigidly connected in series between the outlet of the pressure reducing valve pipeline and the inlet of the cooling equipment pipeline via flanges at both ends, directly controlling the total flow rate of water samples entering the cooling equipment. Vertical pipe 2 is connected in parallel to the outlet branch pipe of the cooling equipment via flanges at both ends. The water sample flowing inside is cooled by the cooling equipment and is used to provide real-time feedback on the temperature of the cooled water sample. The two are arranged in parallel and at intervals, forming a dual-path collaborative structure of the main flow control path and the temperature feedback path. Then, the temperature signal is converted into mechanical deformation by the LCE smart material: inside vertical pipe 2, the horizontal support plates 3 fixed on both inner walls provide support for the temperature sensing component, and the LCE membrane module 5 fixedly bonded at its notch is the core temperature response element. The LCE membrane module 5 has a clear thermo-induced deformation characteristic: it contracts when cooled and expands when heated, and its deformation direction is strictly constrained by two limiting horizontal axes 4 that pass vertically through the notch, ensuring that the deformation occurs only in the horizontal direction.

[0043] When the temperature of the water sample in the outlet pipe of the cooling equipment changes: if the temperature is too low, the LCE membrane module 5 contracts inward along the limiting horizontal axis 4; if the temperature is too high, the LCE membrane module 5 extends outward along the limiting horizontal axis 4; if the temperature is within the suitable range of 25±5℃, the deformation of the LCE membrane module 5 is stable.

[0044] Next, the axial displacement of the LCE is converted into the rotational motion of the drive ring through mechanical transmission: the contraction or elongation of the LCE membrane module 5 directly drives the transmission rod 6, which is fixedly connected to it, to move along the horizontal axis. After the transmission rod 6 passes through the sealing hole 8 on the side wall of the vertical tube 2, the lever arm 7 at its end becomes the key component for motion conversion. Since the lever arm 7 is inclined and its free end is hinged to the ring wall of the drive ring 13, with the hinge point offset from the center of the drive ring 13, the linear displacement of the transmission rod 6 will apply a torque to the drive ring 13 through the lever arm 7, forcing the drive ring 13 to rotate around the axis of the vertical tube 1. At this time, the bent base 20 on both sides of the outer wall of the vertical tube 1 slides and engages with the bearing ring groove 22 at the ring end of the drive ring 13 through the limiting clamp 21 at the top, which not only restricts the axial movement of the drive ring 13, but also reduces rotational friction through the ball rotor, ensuring the stable rotation of the drive ring 13.

[0045] Next, the rotation of the drive ring drives the valve plate assembly to regulate the flow rate through the external drive assembly: when the drive ring 13 rotates, the ball notch groove 19 on its ring end wall rotates together, and the ball notch retainer 18 in the groove pulls or pushes the ball notch retainer cap 17 at the other end through the connecting rod 16. Since the ball notch retainer cap 17 is rotatably sleeved on the ball head rod 15 at the end of the rotating block 14, and the ball head rod 15 is perpendicularly fixed to the rotating block 14, the pushing and pulling motion of the connecting rod 16 is converted into the rotation of the rotating block 14 around the axis of the rotating shaft rod 11. The ball joint structure ensures multi-angle transmission adaptation. One end of the rotating shaft rod 11 passes through the sealing hole 8 on the side wall of the vertical pipe 1, and the other end is rotatably connected to the central shaft 9. Therefore, the rotation of the rotating block 14 will directly drive the rotating shaft rod 11 to rotate synchronously. The arc-shaped valve plate 12 fixedly sleeved on each rotating shaft 11 rotates accordingly: when the drive ring 13 rotates in a certain direction due to the contraction of the LCE membrane module 5 (lower temperature), the arc-shaped valve plate 12 rotates outward, the gap between adjacent valve plates increases, the flow area of ​​the vertical pipe 1 expands, and the flow rate increases; when the drive ring 13 rotates in the opposite direction due to the elongation of the LCE membrane module 5 (higher temperature), the arc-shaped valve plate 12 rotates inward, the gap between adjacent valve plates decreases, the flow area of ​​the vertical pipe 1 decreases, and the flow rate decreases.

[0046] Achieving automatic balance between flow rate and temperature: Through the above-mentioned full-link linkage, the device forms a closed-loop control of temperature feedback, deformation transmission, rotation drive, and flow regulation. When the flow rate is too low, resulting in a low temperature after cooling, the LCE contracts, the transmission rod pulls, the lever arm drives the drive ring to rotate forward, the valve gap increases, and the flow rate increases, reducing the residence time of the water sample in the cooling equipment and avoiding problems such as low temperature and stagnation. When the flow rate is too high, resulting in a high temperature after cooling, the LCE extends, the transmission rod pushes, the lever arm drives the drive ring to rotate in the opposite direction, the valve gap decreases, and the flow rate decreases, increasing the residence time of the water sample in the cooling equipment, ensuring sufficient heat exchange, and avoiding excessive temperature affecting detection accuracy. When the flow rate matches the cooling capacity, the temperature stabilizes at 25±5℃, the LCE deformation is stable, the drive ring and valve assembly are stationary, and the flow rate remains in a suitable state, meeting the detection requirements for steam and water sampling.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic control device for dual parameters of water sample flow rate and temperature in carbonated beverage sampling, characterized in that, include: Parallel and spaced vertical pipe one (1) and vertical pipe two (2), wherein vertical pipe one (1) is rigidly connected between the outlet of the pressure reducing valve pipeline and the inlet of the cooling equipment pipeline in the steam and water sampling pipeline system through flanges at both ends, and vertical pipe two (2) is connected in parallel to the discharge branch pipe of the cooling equipment through flanges at both ends; A flow regulating valve structure is set in the vertical pipe (1). The flow regulating valve structure includes an adjustable valve chip set and an external drive assembly. The external drive assembly is driven to the adjustable valve chip set for synchronously regulating the gap between the valve chip sets. The intelligent material driving mechanism set in the vertical pipe 2 (2) serves as a temperature feedback control point. The intelligent material driving mechanism includes an LCE intelligent material component and a mechanical transmission mechanism. The mechanical transmission mechanism is connected between the LCE intelligent material component and the external driving component in the flow regulating valve structure to form a feedback transmission link.

2. The automatic control device for dual parameters of water sample flow rate and temperature for steam water sampling according to claim 1, characterized in that, The LCE smart material component includes a horizontal support plate (3), a limiting horizontal shaft (4), and an LCE membrane assembly (5). Two symmetrical horizontal support plates (3) are fixedly installed on the inner walls of both sides of the vertical tube (2). A notch is opened at the middle of the end side of the two horizontal support plates (3) that are close to each other. The LCE membrane assemblies (5) are fixedly bonded to both horizontal support plates (3) through the notch. The two LCE membrane assemblies (5) are parallel and aligned. Two limiting horizontal shafts (4) perpendicular to the horizontal support plate (3) are also fixedly connected between the inner walls of both sides of the vertical tube (2). The two limiting horizontal shafts (4) pass through the notches of the two horizontal support plates (3) respectively. The two LCE membrane assemblies (5) are slidably sleeved with the two limiting horizontal shafts (4) respectively. The two limiting horizontal shafts (4) are located on the deformation axis of the LCE membrane assembly (5).

3. The automatic control device for dual parameters of water sample flow rate and temperature for steam water sampling according to claim 2, characterized in that, The LCE film assembly (5) is made of a thermotropic main chain liquid crystal elastomer and is coated with a nano-scale silicon dioxide protective layer.

4. The automatic control device for dual parameters of water sample flow rate and temperature for steam water sampling according to claim 2, characterized in that, The mechanical transmission mechanism includes a transmission rod (6) and a lever arm (7). The horizontal plate (3), the limiting horizontal shaft (4), and the LCE membrane group (5) in the second vertical pipe (2) are all horizontal. The direction of the deformation axis of the LCE membrane group (5) is perpendicular to the first vertical pipe (1). The second vertical pipe (2) has a sealing hole (8) flush with the LCE membrane group (5) on its side wall facing the first vertical pipe (1). The two sets of LCE membrane groups (5) are fixedly connected to the end side facing the first vertical pipe (1) with the transmission rod (6). The transmission rod (6) intersects the vertical axis of the second vertical pipe (2) perpendicularly. The other end of the transmission rod (6) extends through the sealing hole (8) and is hinged with an inclined lever arm (7). The free end of the lever arm (7) is connected to the external drive component in the flow regulating valve structure.

5. The automatic control device for dual parameters of water sample flow rate and temperature for steam water sampling according to claim 4, characterized in that, The adjustable valve chip assembly includes a cross connector (10), a rotating shaft (11), and an arc valve plate (12). Both ends of the central shaft (9) are fixedly fitted with cross connectors (10). The cross connectors (10) are "+" shaped. The central shaft (9) is fixedly connected to the middle of the vertical pipe (1) via the two cross connectors (10), and the central shaft (9) is coaxial with the vertical pipe (1). The side wall at the midpoint of the central shaft (9)... The rotating connection has multiple rotating shafts (11), which are circumferentially distributed and perpendicular to the vertical pipe (1) and the central axis (9). Each rotating shaft (11) is fixedly fitted with a fan-shaped arc valve piece (12). The connection between the rotating shaft (11) and the arc valve piece (12) is located in the middle of the arc valve piece (12). Multiple sets of arc valve pieces (12) can be rotated synchronously to form a closed circumference that fits the internal cavity of the vertical pipe (1).

6. The automatic control device for dual parameters of water sample flow rate and temperature in steam water sampling according to claim 5, characterized in that, The number of the rotating shafts (11) and the arc valve pieces (12) is the same and at least four, and the included angle between two adjacent rotating shafts (11) is the same. The arc of the arc valve pieces (12) is set to be the same as the included angle between two adjacent rotating shafts (11).

7. The automatic control device for dual parameters of water sample flow rate and temperature for steam water sampling according to claim 5, characterized in that, The external drive assembly includes a drive ring (13), a rotating paddle (14), a ball joint rod (15), a connecting rod (16), a ball cap (17), and a grooved ball joint (18). A sealing hole (8) is provided on the outer wall of the first vertical tube (1) corresponding to the axis of each rotating shaft rod (11), and each rotating shaft rod (11) extends through the outer wall of the sealing hole (8). The drive ring (13) is coaxially sleeved on the outside of the first vertical tube (1) and located on one side of the rotating shaft rod (11). The drive ring (13) is flush with the lever arm rod (7), and the free end of the lever arm rod (7) is hinged to one side of the drive ring (13). A rotating paddle (14) perpendicular to the rotating shaft rod (11) is fixedly connected to the end of each rotating shaft rod (11), and the rotating paddle (14) faces the drive ring (13). A ball head rod (15) is fixedly connected to the end of the block (14) facing the drive ring (13), and the end of the ball head rod (15) is spherical. A ball notch cap (17) is rotatably sleeved on the spherical end of the ball head rod (15). A ball notch groove (19) is provided on the ring end wall of the rotating block (14) corresponding to one side of each group of rotating blocks (14). A grooved ball (18) is rotatably locked in the ball notch groove (19). Each group of grooved balls (18) corresponds one-to-one with the ball notch cap (17) connected to the end of each group of rotating blocks (14). An inclined connecting rod (16) is fixedly connected between the corresponding ball notch cap (17) and the grooved ball (18). A ball joint structure is formed between the ball head rod (15) and the connecting rod (16), as well as between the grooved ball (18) and the drive ring (13).

8. The automatic control device for dual parameters of water sample flow rate and temperature for steam water sampling according to claim 7, characterized in that, The center point of the drive ring (13), the midpoint of the line connecting the two sets of LCE membrane modules (5), and the axis of the transmission rod (6) are on the same horizontal line.

9. The automatic control device for dual parameters of water sample flow rate and temperature for steam water sampling according to claim 8, characterized in that, Symmetrical bent bases (20) are fixedly installed on the outer walls of both sides of the vertical pipe (1). The cross section of the bent base (20) is L-shaped. The drive ring (13) is provided with a bearing ring groove (22) on the ring end face away from the rotating block (14). The top of the vertical part of both bent bases (20) is fixedly provided with an integrated limit clamp (21). The limit clamp (21) is slidably clamped in the bearing ring groove (22).

10. The automatic control device for dual parameters of water sample flow rate and temperature for steam water sampling according to claim 9, characterized in that, The cross-sections of the limiting connector (21) and the bearing ring groove (22) are T-shaped, and the outer surface of the limiting connector (21) is inlaid with ball rotors that fit against the inner wall of the bearing ring groove (22).

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