A viscosity measuring device and method for poly(fluoroethylene propylene) resin

Abstract

This invention relates to the field of viscosity measurement technology, and more particularly to a viscosity measuring device and method for poly(perfluoroethylene) propylene resin. The device includes a measuring mechanism connected to an external delivery pipeline, used to detect the viscosity of the resin being transported within the pipeline. The measuring mechanism comprises two coaxial and oppositely arranged main pipes and a driven sleeve located between the two main pipes, the driven sleeve being rotatably connected to the two main pipes. This invention effectively solves the drawbacks of traditional sampling and testing methods, facilitating the integration of testing into the production line, enabling real-time testing of continuously produced resin, improving the immediacy of testing, and allowing for rapid adjustment of resin production parameters based on test results. This avoids the production of large amounts of waste due to delayed test results. Furthermore, by employing multiple methods to detect resin viscosity, it facilitates comparison and verification of test data, improving the accuracy and reliability of the testing.

Description

Technical Field

[0001] This invention relates to the field of viscosity measurement technology, and in particular to a viscosity measuring device and method for perfluoroethylene propylene resin. Background Technology

[0002] As a high-performance fluoropolymer material, perfluoroethylene propylene resin is widely used in fields such as wires and cables, chemical corrosion protection, aerospace, and high-end medical devices due to its excellent chemical stability, resistance to high and low temperatures, and outstanding electrical insulation properties. In its production and synthesis process, melt viscosity is the core parameter that determines the processing performance and intrinsic quality of the final product. It directly affects the molecular weight distribution, flow characteristics, and stability of subsequent extrusion, injection molding, and other processes of the resin. Therefore, accurate measurement and effective control of resin viscosity are key to ensuring product quality consistency and optimizing production processes.

[0003] For a long time, the industry has generally relied on offline sampling and testing methods to assess resin viscosity. This involves taking samples from the polymerization reactor or production line at regular intervals and sending them to the laboratory for subsequent analysis using equipment such as capillary rheometers or melt indexers. This method inevitably has significant lag and cannot reflect the dynamic changes in material viscosity during the production process in real time. This causes process adjustments to lag behind the actual situation. At the same time, a single testing method makes it difficult to cross-validate and compare measurement results, affecting the accuracy and reliability of the measurement data. Summary of the Invention

[0004] This invention provides a device and method for measuring the viscosity of poly(fluoroethylene) propylene resin, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A viscosity measuring device for perfluoroethylene propylene resin includes a measuring mechanism connected to an external delivery pipeline, the measuring mechanism being used to detect the viscosity of the resin in a delivery state within the delivery pipeline;

[0007] The measuring mechanism includes two main tubes arranged coaxially and opposite to each other and a driven sleeve located between the two main tubes. The driven sleeve is rotatably connected to the two main tubes. A plurality of magnets I are provided on the outer wall of the driven sleeve. An active sleeve is sleeved on the outside of the driven sleeve. The active sleeve is rotatably connected to the two main tubes respectively. A plurality of magnets II are provided on the inner wall of the active sleeve to cooperate with each of the magnets I.

[0008] The active sleeve is provided with a detection unit one for detecting the relative position between the driven sleeve and the active sleeve, and a detection unit two for detecting the torque required to drive the active sleeve to rotate.

[0009] Furthermore, the detection unit includes a pad disposed on the outer wall of the driven sleeve and a rangefinder disposed on the inner side of the active sleeve and corresponding to the pad. Along the radial direction of the driven sleeve where the rangefinder is located, the distance between the outer wall of the pad and the rangefinder gradually changes.

[0010] Furthermore, several sector plates are provided on the inner wall of the driven sleeve.

[0011] Furthermore, each of the main pipes is connected to a secondary pipe, and the main pipe is slidably mounted on the corresponding secondary pipe. The two secondary pipes are connected by a connecting frame, and the main pipe is connected to an external conveying pipeline through the secondary pipe.

[0012] A force gauge is installed on one of the secondary pipes, and the force gauge is connected to the main pipe via an elastic body.

[0013] Furthermore, an expansion zone is provided on at least one of the main pipes. Along the axis of the main pipe, the left and right sides of the inner wall of the expansion zone are both conical surfaces. Two cones are provided in the expansion zone. The two cones are used in conjunction with the two conical surfaces respectively, and the cones and the corresponding conical surfaces form a flow-limiting slit.

[0014] The cone is movable along the axis of the main pipe.

[0015] Furthermore, the measuring mechanism also includes a power mechanism that provides power for the rotation of the active sleeve. The power mechanism includes a toothed ring disposed on the outer wall of the active sleeve, a toothed column that is pulsatorically connected to the toothed ring, and a drive motor that provides rotational power to the toothed column. The axis of the toothed column is parallel to the axis of the main tube, and the active sleeve is slidably disposed on the toothed column through the toothed ring.

[0016] Furthermore, the output end of the drive motor is provided with a power shaft, the gear column is hollow, the power shaft passes through the gear column, a spiral groove is provided on the outer wall of the power shaft, and a plurality of sliding pillars are slidably arranged in the spiral groove, and the plurality of sliding pillars are all connected to the gear column;

[0017] The detection unit 2 includes an elastic body 2 disposed at one end of the toothed column and used to provide elastic force to the toothed column, and a force gauge 2 used to detect the elastic force strength of the elastic body 2.

[0018] Furthermore, the number of measuring mechanisms is set to multiple, and the multiple measuring mechanisms are connected to an external delivery pipeline through two swivel joints. The two swivel joints are respectively used to connect the input end and the output end of the measuring mechanism, and the swivel joints are used to control the connection between any of the measuring mechanisms and the external delivery pipeline.

[0019] Furthermore, the swivel joint includes a spherical shell that communicates with the external delivery pipeline and each of the measuring mechanisms, and a baffle plate is rotatably disposed inside the spherical shell for sealing the measuring mechanism;

[0020] An adjusting rod is provided on the spherical shell, the adjusting rod is connected to the cover plate, a handwheel is slidably provided on the adjusting rod, and a retaining ring 1 and a retaining ring 2 that cooperate with each other are respectively provided on the handwheel and the outer wall of the spherical shell, and an elastic body 3 is provided on the adjusting rod to provide elastic force to the handwheel.

[0021] A method for measuring the viscosity of perfluoroethylene propylene resin includes the following steps:

[0022] The swivel joint controls one measuring mechanism to be in a connected state with the external delivery pipeline, while other measuring mechanisms are in a closed state.

[0023] The resin flows through the delivery pipeline to the corresponding measuring mechanism;

[0024] The active bushing is driven to rotate by a power mechanism, and the active bushing drives the driven bushing to rotate through several magnets and several magnets.

[0025] The driven sleeve drives several fan plates inside to rotate, and the fan plates provide auxiliary thrust to the resin, enabling the resin to flow stably.

[0026] The viscosity of the resin itself provides resistance to the rotation of the driven sleeve and several fan plates. The detection unit 2 is used to detect the torque required to drive the driven sleeve and several fan plates to rotate, thereby detecting the resin viscosity.

[0027] Because the rotation of the driven sleeve and several sector plates is hindered by the resin, magnet one and the corresponding magnet two will be misaligned. That is, the driven sleeve and the driving sleeve will be misaligned while rotating. Detection unit one detects the misalignment angle, thereby detecting the resin viscosity.

[0028] When the active sleeve drives the driven sleeve to rotate through magnet one and magnet two, the magnetic field strength on magnet one and magnet two is gradually increased until the driven sleeve overcomes the viscous force of the resin and changes from a stationary state to a state of synchronous rotation with the active sleeve. The magnetic field strength at this time is detected, thereby the resin viscosity can be detected.

[0029] When the resin flows through the inner wall of the main pipe and the inside of the flow-limiting slit, the resin will provide a pulling force to the main pipe. The main pipe moves relative to the secondary pipe and pulls the elastomer to undergo elastic deformation. The force gauge detects the elastic strength of the elastomer at this time, thereby detecting the resin viscosity.

[0030] The above multiple sets of test results are compared and the average value is taken. This average value is the resin viscosity value.

[0031] By adjusting the position of the cone within the main pipe, the size of the flow-limiting slit changes, thereby altering the viscous force exerted by the resin on the inner wall of the expansion zone as it flows through the flow-limiting slit, thus adjusting the sensitivity of resin viscosity detection.

[0032] The technical solution of this invention can achieve the following technical effects:

[0033] It effectively solves the drawbacks of traditional sampling and testing methods, making it easy to integrate testing into the production line and enabling real-time testing of continuously produced resin. This improves the immediacy of testing, facilitates rapid adjustment of resin production parameters based on test results, and avoids the production of large amounts of waste due to delayed test results. At the same time, by using multiple methods to test resin viscosity, it is easy to compare and verify the test data, thereby improving the accuracy and reliability of testing.

[0034] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of a viscosity measuring device for perfluoroethylene propylene resin.

[0037] Figure 2 for Figure 1 A schematic diagram of the exploded structure;

[0038] Figure 3 for Figure 2 A schematic diagram of the exploded structure of the measuring mechanism;

[0039] Figure 4 for Figure 3 Schematic diagram of the main pipe and active bushing;

[0040] Figure 5 for Figure 4 Explosion structure diagram;

[0041] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure of the active casing;

[0042] Figure 7 for Figure 5 Schematic diagram of the cross-sectional structure of the driven sleeve;

[0043] Figure 8 for Figure 5 Schematic diagram of the cross-sectional structure of the mid-diameter expansion zone;

[0044] Figure 9 for Figure 8 Schematic diagram of the middle support tube;

[0045] Figure 10 This is a schematic diagram showing the use of the retainer and the main pipe together.

[0046] Figure 11 This is a schematic diagram of the power mechanism;

[0047] Figure 12 This is a cross-sectional view of the swivel joint.

[0048] Attached reference numeral: 100, delivery pipeline;

[0049] 200. Measuring mechanism; 201. Main tube; 202. Driven sleeve; 203. Magnet one; 204. Active sleeve; 205. Magnet two; 206. Rangefinder; 207. Pad; 208. Sector plate; 209. Expansion zone; 210. Cone; 211. Flow-limiting slit; 212. Support ring; 213. Support tube; 214. Insert rod; 215. Sliding body; 216. Inclined rail; 217. Secondary tube; 218. Force gauge one; 219. Elastic body one; 220. Connecting frame;

[0050] 300, gear sleeve;

[0051] 400. Power mechanism; 401. Drive motor; 402. Gear column; 403. Gear ring; 404. Power shaft; 405. Helical groove; 406. Sliding column; 407. Elastomer II; 408. Force gauge II;

[0052] 500. Rotary joint; 501. Ball shell; 502. Cover plate; 503. Adjusting rod; 504. Handwheel; 505. Snap ring one; 506. Snap ring two; 507. Elastomer three. Detailed Implementation

[0053] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0055] like Figures 1 to 6 As shown, this application provides a viscosity measuring device for poly(perfluoroethylene) propylene resin, including a measuring mechanism 200 connected to an external delivery pipeline 100. The measuring mechanism 200 is used to detect the viscosity of the resin in the delivery pipeline 100 during delivery.

[0056] The measuring mechanism 200 includes two main tubes 201 arranged coaxially and opposite to each other and a driven sleeve 202 located between the two main tubes 201. The driven sleeve 202 is rotatably connected to the two main tubes 201. A plurality of magnets 203 are provided on the outer wall of the driven sleeve 202. An active sleeve 204 is sleeved on the outside of the driven sleeve 202. The active sleeve 204 is rotatably connected to the two main tubes 201 respectively. A plurality of magnets 205 are provided on the inner wall of the active sleeve 204 to cooperate with each magnet 203.

[0057] The active bushing 204 is provided with a detection unit 1 for detecting the relative position between the driven bushing 202 and the active bushing 204, and a detection unit 2 for detecting the torque required to drive the active bushing 204 to rotate.

[0058] Specifically, the input and output ends of the measuring mechanism 200 can be connected to an external conveying pipeline 100, allowing the resin conveyed by the pipeline 100 to flow through the measuring mechanism 200. The measuring mechanism 200 enables continuous resin detection, thus integrating the detection work into the production line and achieving real-time, online resin detection. The two main pipes 201 and the driven sleeve 202 form a complete straight pipe, and the driven sleeve 202 can rotate between the two main pipes 201. Therefore, when the resin flows through the driven sleeve 202, the adhesive force of the resin on the inner wall of the driven sleeve 202 can be applied to the driven sleeve. The tube 202 provides rotational resistance, and the resin viscosity is detected based on the magnitude of the resistance. Of course, to prevent resin from flowing out through the gap between the main tube 201 and the driven sleeve 202, the main tube 201 and the driven sleeve 202 can be sealed by means of sealing rings or mechanical seals. Since sealing rings or other contact sealing methods will provide resistance to the rotation of the driven sleeve 202, in order to improve the accuracy of the test, the device can be verified and data collected using a fluid of known viscosity before the test or before the equipment is assembled. The data obtained can then be used as a reference for the viscosity test of the resin.

[0059] The active sleeve 204 is fastened to the outside of the driven sleeve 202 and several magnets 203, and the two ends of the active sleeve 204 are respectively fitted onto the outer walls of the two main tubes 201. The active sleeve 204 and the main tubes 201 can rotate relative to each other. In this way, the active sleeve 204 can isolate its internal structure and prevent interference. At least one of the magnets 203 and 205 is an electromagnet. By changing the current, the magnetic force between magnets 203 and 205 can be adjusted, which is convenient for measuring resins of different viscosities.

[0060] In use, the driving sleeve 204 is rotated, which in turn drives the driven sleeve 202 to rotate via several magnets 205 and several magnets 203. Resin flows through the delivery pipe 100 and then through the measuring mechanism 200. The resin contacts and adheres to the inner wall of the driven sleeve 202. This adhesive force hinders the rotation of the driven sleeve 202, requiring the driving sleeve 204 to have a certain torque to drive the driven sleeve 202 to rotate normally. By measuring the required torque of the driving sleeve 204 by the detection unit 2, the viscosity of the resin can be detected. Because the viscosity of the resin provides resistance to the rotation of the driven sleeve 202, the magnet 203 on the driven sleeve 202 cannot be accurately aligned with the magnet 205 on the driving sleeve 204. That is, there will be a certain angle between the magnet 203 and the magnet 205 in the circumferential direction of the driven sleeve 202. This angle is the hysteresis angle generated by the resin viscosity of the driven sleeve 202. The detection unit detects this hysteresis angle, that is, it detects the relative position of the driven sleeve 202 and the driving sleeve 204, and thus the resin viscosity can also be detected.

[0061] In some embodiments, since the magnetic force between magnet 1 203 and magnet 205 is adjustable, the force between magnet 1 203 and magnet 205 can be gradually increased initially, so that the force provided by the active sleeve 204 to the driven sleeve 202 gradually increases until the driven sleeve 202 gradually starts to rotate from a stationary state, and finally the driven sleeve 202 and the active sleeve 204 can move synchronously. The minimum magnetic force that enables the driven sleeve 202 and the active sleeve 204 to move synchronously is the magnetic force critical value between magnet 1 203 and magnet 205. Since the resin viscosity is different, the magnetic force critical value is different. Therefore, the resin viscosity can also be detected by detecting the magnetic force critical value. The magnitude of the magnetic force can be achieved by adjusting the current. Therefore, the resin viscosity can be directly detected by detecting the current intensity.

[0062] The technical solution of this invention effectively solves the drawbacks of traditional sampling and testing methods, making it convenient to integrate testing into the production line, enabling real-time testing of continuously produced resin, improving the immediacy of testing, facilitating rapid adjustment of resin production parameters based on test results, avoiding the production of large amounts of waste due to delayed test results, and by using multiple methods to test resin viscosity, it is convenient to compare and verify test data, improving the accuracy and reliability of testing.

[0063] Furthermore, such as Figures 5 to 6 As shown, the detection unit includes a pad 207 disposed on the outer wall of the driven sleeve 202 and a rangefinder 206 disposed on the inner side of the active sleeve 204 and corresponding to the pad 207. Along the radial direction of the driven sleeve 202 where the rangefinder 206 is located, the distance between the outer wall of the pad 207 and the rangefinder 206 gradually changes.

[0064] The detection end of the rangefinder 206 is perpendicular to the axis of the driven sleeve 202. The outer wall of the pad 207 is arc-shaped. On the vertical line connecting the axes of the rangefinder 206 and the driven sleeve 202, the distance between the outer wall of the pad 207 and the rangefinder 206 gradually increases or decreases as the driven sleeve 202 rotates. Thus, when the driven sleeve 202 moves synchronously with the driving sleeve 204 and the driven sleeve 202 exhibits rotational lag, the lag angle of the driven sleeve 202 can be detected by measuring the distance between the rangefinder 206 and the pad 207, thereby detecting the resin viscosity.

[0065] In some embodiments, an angle measuring instrument installed on the active sleeve 204 can also be used to measure the angle deviation between it and the driven sleeve 202. As long as the measurement of the hysteresis angle in this case can be achieved, it is within the scope of protection of this case.

[0066] Furthermore, such as Figure 7 As shown, in order to increase the contact area between the driven sleeve 202 and the resin and improve the adhesive force of the resin on the driven sleeve 202, several fan plates 208 can be provided on the inner wall of the driven sleeve 202. In this way, the adhesive force of the resin on the fan plates 208 will be transmitted to the driven sleeve 202, thereby increasing the torque that drives the driven sleeve 202 to rotate, thus improving the detection accuracy and increasing the detection range.

[0067] Since the fan plate 208 rotates with the driven sleeve 202, the fan plate 208 can assist in providing power for the flow of resin, thereby increasing the speed at which the resin flows through the measuring mechanism 200 and reducing the obstruction and interference of the measuring mechanism 200 on the resin delivery.

[0068] Furthermore, such as Figure 3As shown, each main pipe 201 is connected to a secondary pipe 217, and the main pipe 201 is slidably mounted on the corresponding secondary pipe 217. The two secondary pipes 217 are connected by a connecting bracket 220, and the main pipe 201 is connected to the external conveying pipeline 100 through the secondary pipe 217.

[0069] A force gauge 218 is installed on a secondary pipe 217, and the force gauge 218 is connected to the main pipe 201 through an elastic body 219.

[0070] Since the driven sleeve 202 between the two main pipes 201 can rotate, and the main pipe 201 can slide on the secondary pipe 217, in order to prevent the main pipe 201 from rotating directly on the secondary pipe 217, the shapes of the main pipe 201 and the secondary pipe 217 can be set to shapes other than circles, or a groove can be opened on the main pipe 201, and a sliding rib that cooperates with the groove can be set on the inner wall of the secondary pipe 217. In this way, the main pipe 201 is only allowed to slide on the secondary pipe 217 and cannot rotate. The restriction of the secondary pipe 217 on the main pipe 201 can prevent the main pipe 201 from rotating with the driven sleeve 202.

[0071] Two main pipes 201 are connected to the external delivery pipeline 100 through two secondary pipes 217. When the resin flows through the main pipe 201, the adhesive force of the resin on the inner wall of the main pipe 201 and the inner wall of the driven sleeve 202 will pull the main pipe 201 to slide on the secondary pipe 217. At this time, the main pipe 201 will pull the elastomer 219 to undergo elastic deformation. The force gauge 218 detects the elastic force of the elastomer 219. The higher the viscosity of the resin, the stronger the adhesive force it provides to the main pipe 201, and the higher the value detected by the force gauge 218, thereby realizing the detection of the resin viscosity.

[0072] It should be noted that since the driven sleeve 202 and its internal fan plates 208 rotate, and the fan plates 208 provide auxiliary driving force for the resin, the force detected by the force gauge 218 is the combined force of the viscous force of the resin on the main pipe 201 and the driven sleeve 202 and the reaction force of the fan plates 208 when pushing the resin. If the reaction force of the fan plates 208 is greater than the viscous force of the resin on the main pipe 201 and the driven sleeve 202, then the elastomer 219 will be compressed; otherwise, the elastomer 219 will be stretched. Before actual testing, data from the device can be collected using several fluids of different viscosities to compile basic parameters. When testing the resin, the viscosity of the resin is measured by comparing these basic parameters with the readings of the force gauge 218.

[0073] When the driven sleeve 202 is stationary, the sector 208 will not be subjected to a reaction force. At this time, the force gauge 218 can simply measure the adhesive force of the resin on the main pipe 201, the driven sleeve 202, etc.

[0074] To improve structural strength, the two auxiliary pipes 217 can be fixedly connected by a connecting bracket 220. Since the main pipe 201 can slide on the auxiliary pipes 217, the end face of one of the main pipes 201, which serves as the input end, will be directly pushed by the resin flow force. This force is not the force exerted by the resin's viscosity on the main pipe 201, and it will interfere with the testing process, such as... Figure 3 and Figure 10 As shown, a baffle 300 is provided on the inner wall of the secondary pipe 217, which serves as the input end. The end of the baffle 300 extends to the inner side of the main pipe 201, thereby blocking the end face of the main pipe 201 and allowing the resin to flow directly into the main pipe 201 through the guidance of the baffle 300.

[0075] Furthermore, such as Figure 8 As shown, an expansion zone 209 is provided on at least one main pipe 201. Along the axial direction of the main pipe 201, the left and right sides of the inner wall of the expansion zone 209 are both conical surfaces. Two cones 210 are provided in the expansion zone 209. The two cones 210 are used in conjunction with the two conical surfaces respectively, and the cones 210 and the corresponding conical surfaces form a flow-limiting slit 211.

[0076] The cone 210 is movable along the axis of the main pipe 201.

[0077] The cross-sectional shape of the expansion zone 209 is trapezoidal, with inclined surfaces on both the left and right sides. Therefore, in the circumferential direction of the main pipe 201, conical surfaces are formed on both the left and right sides of the expansion zone 209. The cones 210 and the corresponding conical surfaces can be matched to form a flow-limiting slit 211. When the resin flows through the flow-limiting slit 211, due to the small width of the flow-limiting slit 211, the resin can provide stronger viscosity to the expansion zone 209, improving the sensitivity of the force gauge 218 in detecting the viscosity of the resin. The combined use of the two cones 210 and the two conical surfaces can form two high-viscosity zones within the expansion zone 209, so that the resin entering and exiting the expansion zone 209 can provide strong viscosity to the inner wall of the expansion zone 209.

[0078] Since the cone 210 can move along the axis of the main pipe 201, the distance between the cone 210 and the conical surface is adjustable, that is, the size of the flow-limiting slit 211 is adjustable. This makes it convenient to adjust the sensitivity of resin viscosity detection, increase the detection range, and facilitate the detection of resins with different viscosities.

[0079] It should be noted that, in order to achieve the position adjustment function of the two cones 210, such as Figures 8 to 9As shown, a support ring 212 is provided between the two cones 210, and both ends of the support ring 212 are slidably inserted into the two cones 210 respectively. A support tube 213 is provided in the middle of the support ring 212. One end of the support tube 213 passes through the support ring 212 and the expansion zone 209 and extends out. A through-hole is opened on the support tube 213 inside the support ring 212 along the axis of the main tube 201, and the length direction of the through-hole is parallel to the support tube 213. An insert rod 214 is slidably provided inside the support tube 213. The insert rod 214 and the support tube 212 are connected. 3. The connection is fastened by the set screw. Two inclined rails 216 are inclinedly provided on the end faces of the two cones 210 inside the support ring 212. Each inclined rail 216 is slidably provided with a sliding body 215. The sliding body 215 is connected to the insertion rod 214 through the through hole. When it is necessary to adjust the position of the two cones 210, the insertion rod 214 can be pushed to slide in the support tube 213. The insertion rod 214 uses the two sliding bodies 215 and the two inclined rails 216 to push the two cones 210 closer or further away from each other, thereby making the two cones 210 closer or further away from the two conical surfaces respectively.

[0080] The cone 210 and the support ring 212 can be fixedly connected to the main pipe 201 via the support pipe 213. To reduce the force exerted by the resin flow on the support pipe 213, the shape of the support pipe 213 can be set as follows: Figure 9 The cone shape shown.

[0081] Furthermore, such as Figure 3 , Figure 4 and Figure 11 As shown, the measuring mechanism 200 also includes a power mechanism 400 that provides power for the rotation of the active sleeve 204. The power mechanism 400 includes a toothed ring 403 disposed on the outer wall of the active sleeve 204, a toothed column 402 that is connected to the toothed ring 403 in a transmission manner, and a drive motor 401 that provides rotational power for the toothed column 402. The axis of the toothed column 402 is parallel to the axis of the main tube 201, and the active sleeve 204 is slidably disposed on the toothed column 402 through the toothed ring 403.

[0082] The drive motor 401 can provide rotational power to the active sleeve 204 through the toothed column 402 and the toothed ring 403. Since the main tube 201 can slide on the secondary tube 217, the active sleeve 204 will move synchronously with the main tube 201. At this time, the toothed ring 403 on the active sleeve 204 can slide on the toothed column 402, and the toothed ring 403 and the toothed column 402 are in a meshing state.

[0083] Furthermore, such as Figure 11 As shown, the output end of the drive motor 401 is provided with a power shaft 404, the gear column 402 is hollow, the power shaft 404 passes through the gear column 402, a spiral groove 405 is provided on the outer wall of the power shaft 404, and a number of sliding columns 406 are slidably arranged in the spiral groove 405, and the number of sliding columns 406 are all connected to the gear column 402.

[0084] The detection unit 2 includes an elastic body 2 407 disposed at one end of the tooth post 402 and used to provide elastic force to the tooth post 402, and a force gauge 2 408 used to detect the elastic force strength of the elastic body 2 407.

[0085] The force gauge 408, drive motor 401, and auxiliary tube 217 are all relatively fixed. The drive shaft 404 is mutually restricted to the gear column 402 by a spiral groove 405 and several sliding pillars 406. Furthermore, the elastic body 407 limits the position of the gear column 402 along the axis of the drive shaft 404. When the drive motor 401 drives the drive shaft 404 to rotate, due to the action of the elastic body 407, the sliding pillars 406 cannot slide within the spiral groove 405, causing the drive shaft 404 to drive the gear column 402 to rotate. However, the adhesive force of the resin on the driven sleeve 202 and the driving sleeve 204 obstructs the rotation of the gear column 402. The gear column 402 and the drive shaft 404... 4. Relative motion is generated. Since the gear column 402 and the drive shaft 404 are connected through the spiral groove 405 and several sliding columns 406, the gear column 402 will drive several sliding columns 406 to slide in the spiral groove 405. The gear column 402 will be displaced in the axial direction of the drive shaft 404. The gear column 402 will compress the elastic body 407 and cause it to undergo elastic deformation. The force gauge 408 will detect the elastic force of the elastic body 407. The higher the resin viscosity, the higher the value detected by the force gauge 408. When the gear column 402, the driven sleeve 202 and the driving sleeve 204 are all running stably, the value detected by the force gauge 408 is the viscosity of the resin.

[0086] Furthermore, such as Figure 2 As shown, the number of measuring mechanisms 200 is set to multiple. The multiple measuring mechanisms 200 are connected to the external delivery pipeline 100 through two swivel joints 500. The two swivel joints 500 are used to connect the input end and the output end of the measuring mechanism 200, respectively. The swivel joints 500 are used to control the connection between any measuring mechanism 200 and the external delivery pipeline 100.

[0087] When the resin is being transported through the delivery pipeline 100, the resin can flow through any of the measuring mechanisms 200, and only one measuring mechanism 200 is allowed to be in working condition. Other measuring mechanisms 200 need to be closed by the swivel joint 500. When the measuring mechanism 200 in the detection state fails and cannot work, the swivel joint 500 can control other measuring mechanisms 200 to be connected to the delivery pipeline 100. This ensures the continuity of the detection work and the resin delivery work, and at the same time, it facilitates timely maintenance of the malfunctioning measuring mechanism 200.

[0088] Furthermore, such as Figure 12As shown, the swivel joint 500 includes a spherical shell 501 that communicates with the external delivery pipeline 100 and each measuring mechanism 200. A baffle 502 is rotatably disposed inside the spherical shell 501, and the baffle 502 is used to block the measuring mechanism 200.

[0089] An adjusting rod 503 is provided on the spherical shell 501. The adjusting rod 503 is connected to the cover plate 502. A handwheel 504 is slidably provided on the adjusting rod 503. A retaining ring 505 and a retaining ring 506 that cooperate with each other are respectively provided on the handwheel 504 and the outer wall of the spherical shell 501. An elastic body 507 is provided on the adjusting rod 503 to provide elastic force to the handwheel 504.

[0090] Since two swivel joints 500 can control several measuring mechanisms 200, and the two swivel joints 500 need to be adjusted simultaneously to connect the input and output ends of other measuring mechanisms 200 to the external conveying pipeline 100 at the same time, the two swivel joints 500 can be adjusted simultaneously by connecting an adjusting rod 503 to two baffles 502; the baffles 502 inside the spherical shell 501 can block the ends of multiple measuring mechanisms 200, and only allow the end of one measuring mechanism 200 to connect to the main pipe 201, so that the resin in the conveying pipeline 100 can flow into the corresponding measuring mechanism 200 through the spherical shell 501.

[0091] Both retaining ring 505 and retaining ring 506 are provided with several protrusions and several slots. When the handwheel 504 is engaged with the spherical shell 501 through retaining ring 505 and retaining ring 506, the position of the cover plate 502 is locked. When it is necessary to adjust the position of the cover plate 502, move the handwheel 504 to separate retaining ring 505 and retaining ring 506. Then rotate the handwheel 504 to drive the adjusting rod 503 and the two cover plates 502 to rotate. The elastic body 507 can provide elastic thrust for the handwheel 504. In order to ensure that the handwheel 504 and the adjusting rod 503 rotate synchronously, several ridges can be provided on the outer wall of the adjusting rod 503 to guide the handwheel 504.

[0092] A method for measuring the viscosity of perfluoroethylene propylene resin includes the following steps:

[0093] The swivel joint 500 controls one measuring mechanism 200 to be in a connected state with the external delivery pipeline 100, while other measuring mechanisms 200 are in a closed state;

[0094] The resin flows through the delivery pipeline 100 and the corresponding measuring mechanism 200;

[0095] The active sleeve 204 is driven to rotate by the power mechanism 400. The active sleeve 204 drives the driven sleeve 202 to rotate through a number of magnets 205 and a number of magnets 203.

[0096] Driven sleeve 202 drives several fan plates 208 inside to rotate, and the fan plates 208 provide auxiliary thrust to the resin, enabling the resin to flow stably.

[0097] The viscosity of the resin itself provides resistance to the rotation of the driven sleeve 202 and several fan plates 208. The detection unit 2 detects the torque required to drive the driven sleeve 202 and several fan plates 208 to rotate, thereby detecting the resin viscosity.

[0098] Since the rotation of the driven sleeve 202 and several sector plates 208 is hindered by the resin, the magnet 1 203 and the corresponding magnet 205 will be misaligned. That is, the driven sleeve 202 and the driving sleeve 204 will be misaligned while rotating. The detection unit 1 detects the misalignment angle, thereby detecting the resin viscosity.

[0099] When the active sleeve 204 drives the driven sleeve 202 to rotate through the second magnet 205 and the first magnet 203, the magnetic field strength on the first magnet 203 and the second magnet 205 is gradually increased until the driven sleeve 202 overcomes the adhesive force of the resin and changes from a static state to a state of synchronous rotation with the active sleeve 204. The magnetic field strength at this time is detected, thereby the resin viscosity can be detected.

[0100] When the resin flows through the inner wall of the main pipe 201 and the inside of the flow-limiting slit 211, the resin will provide a pulling force to the main pipe 201. The main pipe 201 moves relative to the secondary pipe 217 and pulls the elastomer 219 to undergo elastic deformation. The force gauge 218 detects the elastic strength of the elastomer 219 at this time, thereby detecting the resin viscosity.

[0101] The above multiple sets of test results are compared and the average value is taken. This average value is the resin viscosity value.

[0102] Adjusting the position of the cone 210 within the main pipe 201 changes the size of the flow-limiting slit 211, thereby altering the viscous force exerted by the resin on the inner wall of the expansion zone 209 as it flows through the flow-limiting slit 211, thus adjusting the sensitivity of the resin viscosity detection.

[0103] The measurement method described above in this invention can effectively realize a viscosity measuring device for poly(perfluoroethylene) propylene resin, and the technical effects it can achieve are as described in the above embodiments, which will not be repeated here.

[0104] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of the application as defined herein, and are to be considered as covering any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from its scope. Thus, if such modifications and modifications fall within the scope of this application and its equivalents, this application intends to include such modifications and modifications.

Claims

1. A viscosity measuring device for perfluoroethylene propylene resin, characterized in that, It includes a measuring mechanism connected to an external delivery pipeline, the measuring mechanism being used to detect the viscosity of the resin being transported within the delivery pipeline; The measuring mechanism includes two main tubes arranged coaxially and opposite to each other and a driven sleeve located between the two main tubes. The driven sleeve is rotatably connected to the two main tubes. A plurality of magnets I are provided on the outer wall of the driven sleeve. An active sleeve is sleeved on the outside of the driven sleeve. The active sleeve is rotatably connected to the two main tubes respectively. A plurality of magnets II are provided on the inner wall of the active sleeve to cooperate with each of the magnets I. The active sleeve is provided with a detection unit one for detecting the relative position between the driven sleeve and the active sleeve, and a detection unit two for detecting the torque required to drive the active sleeve to rotate. The detection unit includes a pad disposed on the outer wall of the driven sleeve and a rangefinder disposed on the inner side of the active sleeve and corresponding to the pad. Along the radial direction of the driven sleeve where the rangefinder is located, the distance between the outer wall of the pad and the rangefinder gradually changes. Each of the main pipes is connected to a secondary pipe, and the main pipe is slidably mounted on the corresponding secondary pipe. The two secondary pipes are connected by a connecting frame, and the main pipe is connected to an external conveying pipeline through the secondary pipe. A force gauge is installed on one of the secondary pipes, and the force gauge is connected to the main pipe via an elastic body. The measuring mechanism also includes a power mechanism that provides power for the rotation of the active sleeve. The power mechanism includes a toothed ring disposed on the outer wall of the active sleeve, a toothed column that is pulsatorically connected to the toothed ring, and a drive motor that provides rotational power to the toothed column. The axis of the toothed column is parallel to the axis of the main tube, and the active sleeve is slidably disposed on the toothed column through the toothed ring. The output end of the drive motor is provided with a power shaft. The toothed column is hollow and the power shaft passes through the toothed column. A spiral groove is opened on the outer wall of the power shaft. A plurality of sliding columns are slidably arranged in the spiral groove and are all connected to the toothed column. The detection unit 2 includes an elastic body 2 disposed at one end of the toothed column and used to provide elastic force to the toothed column, and a force gauge 2 used to detect the elastic force strength of the elastic body 2.

2. The poly(fluoroethylene) propylene resin viscosity measuring device according to claim 1, characterized in that, Several sector plates are provided on the inner wall of the driven sleeve.

3. The poly(fluoroethylene) propylene resin viscosity measuring device according to claim 1, characterized in that, An expansion zone is provided on at least one of the main pipes. Along the axis of the main pipe, the left and right sides of the inner wall of the expansion zone are both conical surfaces. Two cones are provided in the expansion zone. The two cones are used in conjunction with the two conical surfaces respectively, and the cones and the corresponding conical surfaces form a flow-limiting slit. The cone is movable along the axis of the main pipe.

4. The viscosity measuring device for poly(fluoroethylene) propylene resin according to claim 1, characterized in that, The number of measuring mechanisms is set to multiple, and the multiple measuring mechanisms are connected to an external delivery pipeline through two swivel joints. The two swivel joints are respectively used to connect the input end and the output end of the measuring mechanism. The swivel joints are used to control the connection between any of the measuring mechanisms and the external delivery pipeline.

5. The viscosity measuring device for perfluoroethylene propylene resin according to claim 4, characterized in that, The swivel joint includes a spherical shell that communicates with the external delivery pipeline and each of the measuring mechanisms. A baffle is rotatably disposed inside the spherical shell, and the baffle is used to block the measuring mechanism. An adjusting rod is provided on the spherical shell, the adjusting rod is connected to the cover plate, a handwheel is slidably provided on the adjusting rod, and a retaining ring 1 and a retaining ring 2 that cooperate with each other are respectively provided on the handwheel and the outer wall of the spherical shell, and an elastic body 3 is provided on the adjusting rod to provide elastic force to the handwheel.

6. A method for measuring the viscosity of perfluoroethylene propylene resin, using the perfluoroethylene propylene resin viscosity measuring device as described in claim 5, characterized in that... Includes the following steps: The swivel joint controls one measuring mechanism to be in a connected state with the external delivery pipeline, while other measuring mechanisms are in a closed state. The resin flows through the delivery pipeline to the corresponding measuring mechanism; The active bushing is driven to rotate by a power mechanism, and the active bushing drives the driven bushing to rotate through several magnets and several magnets. The driven sleeve drives several fan plates inside to rotate, and the fan plates provide auxiliary thrust to the resin, enabling the resin to flow stably. The viscosity of the resin itself provides resistance to the rotation of the driven sleeve and several fan plates. The detection unit 2 is used to detect the torque required to drive the driven sleeve and several fan plates to rotate, thereby detecting the resin viscosity. Because the rotation of the driven sleeve and several sector plates is hindered by the resin, magnet one and the corresponding magnet two will be misaligned. That is, the driven sleeve and the driving sleeve will be misaligned while rotating. Detection unit one detects the misalignment angle, thereby detecting the resin viscosity. When the active sleeve drives the driven sleeve to rotate through magnet one and magnet two, the magnetic field strength on magnet one and magnet two is gradually increased until the driven sleeve overcomes the viscous force of the resin and changes from a stationary state to a state of synchronous rotation with the active sleeve. The magnetic field strength at this time is detected, thereby the resin viscosity can be detected. When the resin flows through the inner wall of the main pipe and the inside of the flow-limiting slit, the resin will provide a pulling force to the main pipe. The main pipe moves relative to the secondary pipe and pulls the elastomer to undergo elastic deformation. The force gauge detects the elastic strength of the elastomer at this time, thereby detecting the resin viscosity. The above multiple sets of test results are compared and the average value is taken. This average value is the resin viscosity value. By adjusting the position of the cone within the main pipe, the size of the flow-limiting slit changes, thereby altering the viscous force exerted by the resin on the inner wall of the expansion zone as it flows through the flow-limiting slit, thus adjusting the sensitivity of resin viscosity detection.

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