Portable rheometer for detecting performance of fluid curing agent

Abstract

The invention discloses a portable rheometer for detecting the performance of a fluid curing agent, and relates to the technical field of fluid curing agent detection. Comprising a main body, a movable module and a fixed module, a rotor is mounted on the movable module, the fixed module is fixedly connected with a mounting cylinder, an adjusting ring is rotationally connected to the upper portion of the mounting cylinder, symmetrically-distributed connecting rods are mounted on the upper side of the adjusting ring, and the adjusting ring is slidably connected with two symmetrically-distributed arc-shaped rods through the connecting rods on the adjusting ring; the two arc-shaped rods are jointly and fixedly connected with two symmetrically-distributed electric sliding rails, two sliding blocks are arranged on the opposite sides of the two electric sliding rails respectively, and a material scraping piece is jointly installed on the two corresponding sliding blocks on the two electric sliding rails. According to the invention, the scraping piece is bent and attached to the rotor by means of the abutting of the scraping piece and the peripheral side of the rotor, and then the overflowing sample is cut off through the contact of the scraping piece and the mounting cylinder, so that the scraping frequency is reduced, the test convenience is improved, the test time is saved, and the probability of introducing bubbles and structural interference is reduced.

Description

Technical Field

[0001] This invention relates to the field of fluid curing agent testing technology, and in particular to a portable rheometer for testing the performance of fluid curing agents. Background Technology

[0002] Fluid curing agents are additives that achieve liquid-solid transformation through chemical reactions and are widely used in fields such as construction and composite material manufacturing. Rotational rheometers, as instruments for measuring the rheological properties of materials (such as viscoelasticity and viscosity), play a crucial role in the research and quality control of curing agents. When conducting rheological tests on curing agents, a quantitative sample is typically placed at the center of the rheometer's test plate. The rotor is then pressed down to a set gap, allowing the sample to fill the gap and overflow evenly along the periphery. Subsequently, a scraper is used to gently scrape away the overflowing sample smoothly and continuously along the outer edge of the rotor, avoiding bringing the sample back into the gap as much as possible. If there is still residue around the periphery, the scraper can be adjusted slightly for further scraping until the sample is essentially removed and does not affect the test. However, this scraping method often requires multiple repetitions. Furthermore, scraping along the outer periphery of the rotor during sample removal is inconvenient, cumbersome, and time-consuming, affecting testing efficiency. Additionally, as the scraper rotates along the rotor, the overflowing adhesive flows around the rotor, easily introducing air bubbles and structural interference, affecting the accuracy and repeatability of the test results. Summary of the Invention

[0003] This invention provides a portable rheometer for testing the performance of fluid curing agents, overcoming the shortcomings of existing rotational rheometers, which require multiple scrapings of spilled sample during the sample addition process, resulting in inconvenient and cumbersome operation and reduced testing efficiency.

[0004] The technical solution is as follows: A portable rheometer for testing the performance of fluid curing agents includes: a main body, a moving module, and a stationary module. Both the moving module and the stationary module are disposed on the main body. A rotor is mounted on the moving module. A mounting cylinder is fixedly connected to the stationary module. An adjusting ring is rotatably connected to the upper part of the mounting cylinder. A motor is mounted on the mounting cylinder near the adjusting ring. The output shaft of the motor is driven by a gear ring. Symmetrically distributed connecting rods are mounted on the upper side of the adjusting ring. Two symmetrically distributed arc-shaped rods are slidably connected to the adjusting ring via the connecting rods. The two arc-shaped rods are jointly fixedly connected to two symmetrically distributed electric slide rails. Two sliders are respectively disposed on the opposing sides of the two electric slide rails. A scraper is jointly mounted on the two corresponding sliders on the two electric slide rails. The scraper is used to adhere to the circumference of the rotor and scrape off excess curing agent. A cleaning component for cleaning the scraper is provided on the adjusting ring.

[0005] Furthermore, the cleaning assembly includes: a connecting frame slidably connected to all the connecting rods of the adjusting ring; a first elastic element fixedly connected between the arc-shaped rod and the connecting frame; the adjusting ring is equipped with symmetrically distributed first push rods; the telescopic ends of the first push rods pass through adjacent arc-shaped rods and are fixedly connected to the connecting frame; and scrapers are fixedly connected to the connecting frame near the two scraping components, the scrapers being used to abut against adjacent scraping components and clean them.

[0006] Furthermore, an elastic membrane is bonded to the periphery of the upper part of the mounting cylinder, and the middle part of the elastic membrane is bonded to the mounting cylinder. An elastic ring is provided between the elastic membrane and the mounting cylinder. The elastic ring is used to guide the surface of the elastic membrane to form a pit. An expansion mechanism and an adsorption mechanism are provided inside the mounting cylinder. The expansion mechanism and the adsorption mechanism are used together to control the shape of the pit formed by the elastic membrane.

[0007] Furthermore, the elastic coefficient of the elastic ring is greater than that of the elastic membrane.

[0008] Furthermore, the expansion mechanism includes: symmetrically distributed second push rods, all installed inside the mounting cylinder; the telescopic ends of all the second push rods are fixedly connected to a connecting ring; the connecting ring is hinged to annularly distributed transmission rods; the end of the transmission rod away from the connecting ring is hinged to a traction member; guide grooves are provided on the mounting cylinder near the traction member; the traction member slides within adjacent guide grooves; the traction member is fixedly connected to the elastic ring; an annular groove is provided on the upper side of the mounting cylinder to accommodate the elastic ring; the minimum diameter of the annular groove is greater than the maximum diameter of the rotor.

[0009] Furthermore, the guide groove is composed of an upper straight section, an inclined section, and a lower straight section, and the distance between the center line of the upper straight section and the center line of the lower straight section is equal to the maximum vertical distance between the traction member and the upper side of the mounting cylinder.

[0010] Furthermore, the adsorption mechanism includes: a third push rod installed inside the mounting cylinder; a mounting plate is fixedly connected to the telescopic end of the third push rod; a ring-shaped support frame is hinged to the mounting plate; a sealing film is bonded to both the mounting plate and the support frame; the sealing film contacts the mounting cylinder; a reset ring is bonded to the sealing film; both the sealing film and the reset ring are made of elastic material; an air pump is installed on the mounting plate; and uniformly distributed capillary pores are provided in the middle of the mounting cylinder.

[0011] Furthermore, each mounting cylinder is provided with an I-shaped groove near the guide groove, and an abutment and a T-shaped member are slidably connected in the I-shaped groove. The traction member is used to squeeze the adjacent abutment, and the abutment is slidably connected to the adjacent T-shaped member. The T-shaped member is used to squeeze the elastic membrane.

[0012] Furthermore, a second elastic member is fixedly connected between the abutting member and the adjacent T-shaped member. Each mounting cylinder near the I-shaped groove is fixedly connected with a limiting strip and provided with an arc-shaped groove. The arc-shaped groove is used to make way for the deformation of the limiting strip. The T-shaped member is provided with a rectangular groove for the limiting strip to be inserted. The traction member is used to squeeze the limiting strip.

[0013] Furthermore, the limiting strip has an inclined surface on the side near the adjacent T-shaped member, which is used to guide the limiting strip into the rectangular groove of the adjacent T-shaped member.

[0014] The present invention has at least the following beneficial effects: The present invention relies on the contact between the scraper and the circumference of the rotor to make the scraper bend and fit against the rotor. Then, through the contact between the scraper and the mounting cylinder, the overflowing sample is cut off, thus reducing the number of scrapings, improving the convenience of testing, saving testing time, and reducing the probability of introducing air bubbles and structural interference.

[0015] After the scraper removes the sample overflowing from the outside of the rotor, the scraper blade contacts the scraper to remove the sample adhering to it. This allows the scraper to continuously remove the overflowing sample, reducing the number of times the scraper needs to be cleaned.

[0016] By squeezing the elastic membrane with the elastic ring, a pit is created in the middle of the elastic membrane. This helps the operator determine the sample addition position and gathers the sample in the middle of the rotor. As the rotor presses down, the sample can expand evenly in the circumference and come into contact with the rotor, thus improving the convenience of the sample addition operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the mounting cylinder and adjusting ring of the present invention; Figure 3 This is a three-dimensional structural diagram of the adjusting ring and the arc-shaped rod of the present invention; Figure 4 This is a three-dimensional structural diagram of the scraper and scraper of the present invention; Figure 5 This is a three-dimensional structural diagram of the electric slide rail and scraper of the present invention; Figure 6 This is a three-dimensional structural cross-sectional view of the mounting cylinder and elastic membrane of the present invention; Figure 7 This is an exploded view of the mounting cylinder, elastic membrane, and connecting ring of the present invention; Figure 8 Appendix to this invention Figure 6 Enlarged view of point A in the middle; Figure 9 This is a three-dimensional structural cross-sectional view of the sealing film and reset ring of the present invention; Figure 10 Appendix to this invention Figure 6 Enlarged view of point B in the middle.

[0018] The meanings of the reference numerals in the attached diagram are as follows: 1-Main body, 2-Moving module, 3-Fixed module, 4-Mounting cylinder, 401-Capillary hole, 5-Adjusting ring, 6-Motor, 7-Arc rod, 8-Electric slide rail, 9-Scraper component, 10-Connecting frame, 11-First elastic component, 12-First push rod, 13-Scraper, 14-Elastic membrane, 15-Elastic ring, 151-Ring groove, 16-Second push rod, 17-Connecting ring, 18-Transmission rod, 19-Traction component, 191-Guide groove, 20-Third push rod, 21-Mounting plate, 22-Support frame, 23-Sealing membrane, 24-Reset ring, 25-Air pump, 26-Contact component, 261-I-shaped slide groove, 27-T-shaped component, 28-Second elastic component, 29-Limiting strip, 291-Arc groove. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] It is important to know that rotational rheometers are available with rotors and test plates of various specifications.

[0021] Example 1 This embodiment provides a portable rheometer for testing the performance of fluid curing agents, which solves the problem that in the existing rotational rheometer, the overflowing sample needs to be scraped off multiple times during the sample addition process, which is inconvenient and cumbersome and affects the testing efficiency.

[0022] See Figures 1 to 5A portable rheometer for testing the performance of fluid curing agents includes: a main body 1, a moving module 2, and a stationary module 3. Both the moving module 2 and the stationary module 3 are mounted on the main body 1. The moving module 2 can reciprocate up and down relative to the main body 1, and a rotor is mounted on the moving module 2. A mounting cylinder 4 is fixedly connected to the stationary module 3. An adjusting ring 5 is rotatably connected to the upper part of the mounting cylinder 4. A motor 6 is mounted inside the upper part of the mounting cylinder 4. The output shaft of the motor 6 is connected to the adjusting ring 5 via a gear ring drive. Symmetrically distributed connecting rods are mounted on the upper side of the adjusting ring 5, and the adjusting ring 5 is slidably connected to two symmetrically distributed connecting rods on its upper side. An arc-shaped rod 7 is fixed together with two symmetrically distributed electric slide rails 8. Two sliders are respectively provided on the opposite sides of the two electric slide rails 8. A scraper 9 is installed on the two corresponding sliders on the two electric slide rails 8. The scraper 9 is made of elastic metal, and its two ends are in a coiled state (similar to a coil spring). The middle part of the scraper 9 is in a vertical state. The horizontal height of the middle part of the scraper 9 is lower than the horizontal height of the arc-shaped rod 7 and the electric slide rail 8. The scraper 9 is used to fit against the circumference of the rotor and scrape off excess curing agent. A cleaning component for cleaning the scraper 9 is provided on the adjusting ring 5.

[0023] The above setup enables the scraper 9 to bend and conform to the rotor by contacting the scraper 9 with the rotor's periphery, increasing the scraping range per stroke. Then, the scraper 9 cuts off the overflowing sample by contacting the mounting cylinder 4. This reduces the number of scraping strokes, improves testing convenience, and saves testing time. Furthermore, by using the scraper 9 to cut off the overflowing sample vertically downwards along the rotor, the overflowing adhesive is prevented from flowing along the rotor as in traditional scraping methods, and the probability of introducing air bubbles and structural interference is reduced.

[0024] It should be noted that in this embodiment, the middle part of the upper side of the mounting cylinder 4 is used to place the test plate.

[0025] See Figures 2 to 4 The cleaning assembly includes: a connecting frame 10, slidably connected to all the connecting rods of the adjusting ring 5; a first elastic element 11 fixedly connected between the arc-shaped rod 7 and the connecting frame 10, the first elastic element 11 being a spring; the adjusting ring 5 is equipped with symmetrically distributed first push rods 12, the telescopic ends of the first push rods 12 passing through adjacent arc-shaped rods 7 and fixedly connected to the connecting frame 10; there can be two symmetrically distributed first push rods 12, used to apply symmetrical forces to both sides of the connecting frame 10; scrapers 13 are fixedly connected to the connecting frame 10 near the two scraper components 9, the distance between the two scrapers 13 is greater than the maximum diameter of the rotor, so that the scraper component 9 can only contact the corresponding scraper 13 after moving away from the rotor; the scraper 13 is used to abut against the adjacent scraper component 9 and clean the scraper component 9.

[0026] The above configuration enables the scraper 9 to scrape away the sample overflowing from the outside of the rotor after the scraper 9 scrapes it off. The scraper 13 then contacts the scraper 9 to scrape away the sample adhering to the scraper 9. This allows the scraper 9 to continuously scrape away the overflowing sample, reducing the number of times the scraper 9 needs to be cleaned.

[0027] The testing procedure for the flow characteristics of fluid curing agents is as follows: Select the rotor and test plate specifications, test temperature, and test mode according to the properties of the fluid curing agent. Then, add the sample to the test plate (i.e., the middle part of the upper side of the mounting cylinder 4), set the distance between the rotor and the mounting cylinder 4, and control the rotor to move downward. The rotor squeezes the sample, causing the sample to overflow to the outside of the rotor. Then, the cleaning step begins.

[0028] Cleaning steps: Start the electric slide rail 8 and control the two scraper parts 9 to move closer to each other until the two scraper parts 9 contact the left and right sides of the outer periphery of the rotor respectively. Continue to control the scraper parts 9 to move so that the winding parts at both ends of the scraper parts 9 gradually unfold and gradually wrap around the outer periphery of the rotor, so that the arc of the part of the scraper parts 9 in contact with the rotor is consistent with the arc of the outer periphery of the rotor. When the two scraper parts 9 are about to contact each other, stop the electric slide rail 8.

[0029] The first push rod 12 is activated, and the telescopic end of the first push rod 12 drives the connecting frame 10 to move down. The connecting frame 10 drives the arc rod 7 and the electric slide rail 8 to move down together through the first elastic element 11. The electric slide rail 8 drives the two scraper parts 9 to move down. The scraper parts 9 move down along the outer periphery of the rotor. During this process, the scraper parts 9 scrape off the sample adhering to the outer periphery of the rotor and the overflowing sample until the scraper parts 9 contact the mounting cylinder 4. The overflowing sample is blocked by the scraper parts 9 on the other side of the rotor. At this time, the first push rod 12 stops.

[0030] When the electric slide rail 8 is started, it controls the two scraper parts 9 to move away from each other. Under the elastic action of the winding parts at both ends of the scraper part 9, the shape of the scraper part 9 gradually recovers. During the movement, since the scraper part 9 is always in contact with the upper side of the mounting cylinder 4, the sample it cuts can be carried away from the rotor during the movement of the scraper part 9.

[0031] As the scraper 9 moves, when the scraper 9 contacts the corresponding scraper 13, the first push rod 12 is activated and controls the connecting frame 10 to move downward (since the scraper 9 abuts against the mounting cylinder 4, the arc rod 7 and the electric slide rail 8 remain stationary during this process), compressing the first elastic element 11. The connecting frame 10 drives the scraper 13 to move downward, and the scraper 13 slides down along the scraper 9 and scrapes off the sample adhering to the side of the scraper 9. After the scraper 13 contacts the mounting cylinder 4, the first push rod 12 stops. At this time, the sample originally adhering to the scraper 9 is scraped off by the scraper 13, and the sample accumulates between the scraper 13 and the mounting cylinder 4.

[0032] The electric slide rail 8 is activated and controls the two scraper components 9 to move closer to each other, so that the scraper component 9 loses contact with the scraper 13 (to prevent the accumulated sample from re-adhering to the scraper component 9 after the scraper 13 moves upward). At this time, the first push rod 12 is activated and controls the connecting frame 10 to move upward until it is reset. During the upward movement of the connecting frame 10, the connecting frame 10 drives the arc rod 7 and the electric slide rail 8 to move upward and reset together through the first elastic element 11.

[0033] Motor 6 starts and drives adjusting ring 5 to rotate 90° through gear ring. Repeat the above steps to make scraper 9 wrap around the front and back sides of the rotor, thus scraping off the sample overflowing from the front and back sides of the rotor. Then select the test mode and start the test. After the test, clean the sample adhering to the rotor and mounting cylinder 4.

[0034] Example 2 This embodiment is a further optimization based on Embodiment 1.

[0035] When using existing rotational rheometers, operators need to add samples to the center of the test plate. However, this method of sample addition is highly susceptible to subjective factors. It is difficult to ensure that the sample is centered on the test plate during sample addition. As the rotor presses down to spread the sample, the sample may not be able to fully contact the underside of the rotor, resulting in a contact area between the rotor and the sample that is smaller than the required contact area for the test. This leads to deviations in the test results. When the above situation occurs, the sample needs to be wiped off and re-added, which reduces the testing efficiency.

[0036] See Figure 2 , Figure 6 and Figure 7 An elastic membrane 14, made of thermoplastic polyurethane film, is bonded to the upper periphery of the mounting cylinder 4. The middle portion of the elastic membrane 14 is bonded to the mounting cylinder 4; that is, the portion of the elastic membrane 14 other than its middle and outer periphery is not bonded to the mounting cylinder 4. An elastic ring 15 is provided between the elastic membrane 14 and the mounting cylinder 4. The elastic ring 15 is used to move the unbonded portion of the elastic membrane 14 upwards, guiding the surface of the elastic membrane 14 to create a pit (see...). Figure 2 and Figure 6 The installation cylinder 4 is equipped with an expansion mechanism and an adsorption mechanism, which together control the shape of the pit formed by the elastic membrane 14.

[0037] The above setup enables the elastic ring 15 to squeeze the elastic membrane 14, creating a pit in the middle of the elastic membrane 14. This helps the operator determine the sample placement position and gathers the sample in the middle of the rotor. As the rotor presses down, the sample can expand evenly in the circumference and come into contact with the rotor, thus improving the convenience of the sample placement operation.

[0038] See Figure 6 The diameter of the bonding position between the middle part of the elastic membrane 14 and the mounting cylinder 4, as well as the minimum diameter of the elastic ring 15, are both smaller than the diameter of the lower end face of the smallest rotor. This allows the pit of the elastic membrane 14 to be located below the middle of the rotor, so as to gather the sample. The elastic coefficient of the elastic ring 15 is greater than that of the elastic membrane 14.

[0039] See Figure 3 and Figures 6 to 8 The expansion mechanism includes two symmetrically distributed second push rods 16, both installed inside the mounting cylinder 4. The telescopic ends of the two second push rods 16 are jointly fixed to a connecting ring 17. The connecting ring 17 is hinged to a ring-shaped transmission rod 18. A traction member 19 is hinged to the upper end of the transmission rod 18. Guide grooves 191 are provided on the mounting cylinder 4 near the traction member 19. The traction member 19 slides within adjacent guide grooves 191, and has two sliding points that together restrict the free swinging of the traction member 19. The guide grooves 191 are formed by the upper flat... The device consists of a straight section, an inclined section, and a lower straight section. The distance between the center line of the upper straight section and the center line of the lower straight section is equal to the maximum vertical distance between the traction member 19 and the upper side of the mounting cylinder 4. Thus, after the traction member 19 moves to the lower straight section of the guide groove 191, the upper side of the traction member 19 can be coplanar with the upper side of the mounting cylinder 4. The traction member 19 is fixedly connected to the elastic ring 15. The upper side of the mounting cylinder 4 is provided with an annular groove 151, which is used to accommodate the elastic ring 15, so that the pit of the elastic membrane 14 disappears. The minimum diameter of the annular groove 151 is greater than the maximum diameter of the rotor.

[0040] The above configuration enables the diameter of the elastic ring 15 to be controlled by the movement of the traction member 19, thereby changing the diameter of the upper edge of the recess in the elastic membrane 14.

[0041] The process of controlling the diameter of the upper edge of the recess in the elastic membrane 14 is as follows: When the second push rod 16 is activated, the telescopic ends of the two second push rods 16 extend together, driving the connecting ring 17 to move upward. The connecting ring 17 squeezes the transmission rod 18, causing the transmission rod 18 to swing and squeeze the traction member 19 to move outward towards the mounting cylinder 4. The traction member 19 stretches the elastic ring 15, increasing the diameter of the elastic ring 15. Under the guidance of the elastic ring 15, the diameter of the upper edge of the recess in the elastic membrane 14 increases. Conversely, when the telescopic ends of the second push rods 16 contract, the diameter of the upper edge of the recess in the elastic membrane 14 decreases.

[0042] When testing the flow characteristics of the fluid curing agent, the elastic membrane 14 needs to be kept flat to ensure that the distance between the rotor and the elastic membrane 14 is consistent. The specific operation is as follows: control the traction member 19 to move along the guide groove 191 to the outside of the mounting cylinder 4. When the traction member 19 moves to the lower straight part of the corresponding guide groove 191, the upper side of the traction member 19 is coplanar with the upper side of the mounting cylinder 4, and the elastic ring 15 is located in the ring groove 151. In this way, the elastic membrane 14 loses contact with the elastic ring 15, and the elastic membrane 14 remains flat. In this case, the flat elastic membrane 14 does not affect the scraping of the overflow sample by the scraper 9.

[0043] See Figure 6 , Figure 7 and Figure 9 The adsorption mechanism includes: a third push rod 20, installed inside the mounting cylinder 4; a mounting plate 21 is fixedly connected to the telescopic end of the third push rod 20; a ring-shaped support frame 22 is hinged to the mounting plate 21; a sealing membrane 23 is bonded to both the mounting plate 21 and the support frame 22; the sealing membrane 23 contacts the mounting cylinder 4; the mounting plate 21, the sealing membrane 23, and the mounting cylinder 4 together form a negative pressure chamber; a reset ring 24 is bonded to the sealing membrane 23; both the sealing membrane 23 and the reset ring 24 are made of elastic rubber, wherein the elasticity of the sealing membrane 23 is used to follow the support frame 22. The swing deformation occurs, and the elasticity of the reset ring 24 is used to gather all the support frames 22, providing power for the reset movement of the support frames 22; the mounting plate 21 is equipped with an air pump 25, which is used to extract the air from the negative pressure chamber; the middle part of the mounting cylinder 4 is provided with uniformly distributed capillary holes 401, and among all the capillary holes 401, the maximum distance between two capillary holes 401 is greater than the diameter of the lower end face of the largest specification rotor. The capillary holes 401 are used to adsorb and fix the elastic membrane 14, thereby controlling the diameter of the lower edge of the pit of the elastic membrane 14.

[0044] The above settings enable the diameter of the upper and lower edges of the recess in the elastic membrane 14 to be controlled by the positions of the elastic ring 15 and the sealing membrane 23, thereby controlling the shape and volume of the recess in the elastic membrane 14. This helps the sample to contact the rotor, reduces the probability of air bubbles being drawn into the sample during expansion when the rotor is pressed down, and improves the accuracy of the test results.

[0045] The process for controlling the diameter of the lower edge of the recess in the elastic membrane 14 is as follows: the air pump 25 is started to generate negative pressure in the negative pressure chamber, and the negative pressure chamber adsorbs and fixes the corresponding position of the elastic membrane 14 through the corresponding capillary pores 401.

[0046] When the third push rod 20 is activated, its telescopic end extends and moves the mounting plate 21 upward, reducing the distance between the mounting plate 21 and the mounting cylinder 4. This compresses the support frame 22, causing its upper end to move outward from the mounting cylinder 4. During this movement, the support frame 22 deforms the sealing membrane 23 and the reset ring 24, stretching and storing force in the reset ring 24. This increases the area of ​​the sealing membrane 23 corresponding to the elastic membrane 14, thereby increasing the area of ​​the elastic membrane 14 in contact with the mounting cylinder 4. Conversely, by controlling the telescopic end of the third push rod 20 to retract, the area of ​​the elastic membrane 14 in contact with the mounting cylinder 4 decreases.

[0047] Sample addition procedure: Before adding the sample, adjust the shape of the pit in the elastic membrane 14 to the state shown in the attached figure, that is, a frustum shape that is thicker at the top and thinner at the bottom. This state makes it easier for the operator to add the sample into the pit and facilitates the sample to wet the pit, reducing the probability of air bubbles being generated between the sample and the pit.

[0048] After adding the sample, the diameters of the upper and lower edges of the pits in the elastic membrane 14 are first increased together. Once the diameter of the lower edge of the pit reaches its limit (at which point the positions of the elastic membrane 14 and all the capillary pores 401 are adsorbed and fixed on the upper side of the mounting cylinder 4), the diameter of the upper edge of the pit in the elastic membrane 14 is reduced until it reaches its minimum. Then, the rotor is brought into contact with the upper side of the corresponding pit on the elastic membrane 14. Subsequently, the diameter of the lower edge of the pit is gradually reduced. During this process, the sample liquid level inside the pit gradually rises and gradually squeezes the air inside the pit out through the gap between the pit and the rotor until the sample inside the pit contacts the rotor. As the diameter of the lower edge of the pit continues to decrease, the pit squeezes the sample, causing the sample to overflow from between the pit and the rotor. This process reduces the probability of bubbles or voids caused by uneven sample surfaces by reducing the initial contact area between the sample and the rotor.

[0049] While continuing to shrink the diameter of the lower edge of the pit, the diameter of the upper edge of the pit is expanded, while the volume of the pit continues to decrease. As the diameter of the upper edge of the pit gradually expands, the sample inside the pit continuously overflows outward and continuously wets the rotor during the overflow process. When the diameters of the upper and lower edges of the pit are equal to the diameter of the rotor, the deformation of the pit stops. At this point, the pit is disc-shaped, and the rotor is controlled to move downward to the set distance. During the downward movement of the rotor, the pit in the middle of the elastic membrane 14 is fitted onto the outer periphery of the rotor, while squeezing the sample inside the pit to overflow. The above process actively controls the shape of the pit, so that the pit actively guides the sample to gradually contact and expand from the middle of the rotor to its outer side. In this way, when the sample has poor wettability to the rotor, the probability of the sample not being fully wetted by the rotor during the expansion process and creating voids between the rotor and the sample is reduced.

[0050] Example 3 This embodiment is a further optimization based on embodiment 2.

[0051] See Figures 6 to 8 and Figure 10 Each mounting cylinder 4 is provided with an I-shaped groove 261 near the guide groove 191. An abutment 26 and a T-shaped member 27 are slidably connected in the I-shaped groove 261. The traction member 19 is used to squeeze the adjacent abutment 26. The abutment 26 is closer to the middle of the mounting cylinder 4 than the T-shaped member 27. The abutment 26 is slidably connected to the adjacent T-shaped member 27. The T-shaped member 27 is used to squeeze the elastic membrane 14.

[0052] The above setup enables the elastic membrane 14 to be compressed around its periphery by the T-shaped member 27 after it returns to a flat state, causing the periphery of the elastic membrane 14 to expand and the center of the elastic membrane 14 to tighten, thereby enhancing the deformation resistance of the center of the elastic membrane 14 and keeping the elastic membrane 14 flat during the test.

[0053] See Figure 10 A second elastic element 28 is fixed between the contacting member 26 and the adjacent T-shaped member 27. The second elastic element 28 is a spring. Limiting strips 29 are fixed to the mounting cylinder 4 near the I-shaped slide groove 261 and are provided with arc-shaped grooves 291. The limiting strips 29 are made of elastic metal. The arc-shaped grooves 291 are used to make way for the deformation of the limiting strips 29. The T-shaped member 27 is provided with a rectangular groove for the insertion of the limiting strips 29. The traction member 19 is used to squeeze the limiting strips 29. The side of the limiting strip 29 near the adjacent T-shaped member 27 is provided with an inclined surface. The inclined surface is used to guide the limiting strips 29 into the rectangular groove of the adjacent T-shaped member 27.

[0054] As the traction member 19 moves along the adjacent guide groove 191 towards the outside of the mounting cylinder 4, the traction member 19 gradually approaches the adjacent contact member 26. When the traction member 19 contacts the contact member 26, as the traction member 19 continues to move, it squeezes the contact member 26 to slide along the I-shaped groove 261 and compresses the corresponding second elastic member 28. When the traction member 19 moves to the end of the lower straight portion of the adjacent guide groove 191, it will squeeze and deform the corresponding limiting strip 29, reducing the height of the limiting strip 29 and moving it out of the groove of the adjacent T-shaped member 27, releasing the limiting of the T-shaped member 27, allowing the T-shaped member 27 to move towards the outside of the mounting cylinder 4, expanding the periphery of the elastic membrane 14, and tightening the elastic membrane 14. The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A portable rheometer for testing the performance of fluid curing agents, comprising: The system comprises a main body (1), a moving module (2), and a fixed module (3). Both the moving module (2) and the fixed module (3) are located on the main body (1). A rotor is mounted on the moving module (2), and a mounting cylinder (4) is fixedly connected to the fixed module (3). The system is characterized in that an adjusting ring (5) is rotatably connected to the upper part of the mounting cylinder (4), and a motor (6) is mounted on the mounting cylinder (4) near the adjusting ring (5). The output shaft of the motor (6) is driven by a gear ring to the adjusting ring (5). A gear is mounted on the upper side of the adjusting ring (5). The adjusting ring (5) is slidably connected to two symmetrically distributed arc rods (7) via the connecting rods on it. The two arc rods (7) are fixed together to two symmetrically distributed electric slide rails (8). Two sliders are respectively provided on the opposite sides of the two electric slide rails (8). A scraper (9) is installed on the two corresponding sliders on the two electric slide rails (8). The scraper (9) is used to fit against the circumference of the rotor and scrape off excess curing agent. The adjusting ring (5) is provided with a cleaning component for cleaning the scraper (9).

2. The portable rheometer for testing the performance of fluid curing agents according to claim 1, characterized in that, The cleaning component includes: The connecting frame (10) is slidably connected to all the connecting rods of the adjusting ring (5). The arc rod (7) is fixedly connected to the connecting frame (10) with a first elastic element (11). The adjusting ring (5) is equipped with symmetrically distributed first push rods (12). The telescopic end of the first push rod (12) passes through the adjacent arc rod (7) and is fixedly connected to the connecting frame (10). The connecting frame (10) is fixedly connected to scraper blades (13) near the two scraper components (9). The scraper blades (13) are used to abut against the adjacent scraper components (9) and clean the scraper components (9).

3. The portable rheometer for testing the performance of fluid curing agents according to claim 1, characterized in that, An elastic membrane (14) is bonded to the upper periphery of the mounting cylinder (4). The middle part of the elastic membrane (14) is bonded to the mounting cylinder (4). An elastic ring (15) is provided between the elastic membrane (14) and the mounting cylinder (4). The elastic ring (15) is used to guide the surface of the elastic membrane (14) to form a pit. An expansion mechanism and an adsorption mechanism are provided inside the mounting cylinder (4). The expansion mechanism and the adsorption mechanism are used together to control the shape of the pit formed by the elastic membrane (14).

4. A portable rheometer for testing the performance of fluid curing agents according to claim 3, characterized in that, The elastic coefficient of the elastic ring (15) is greater than that of the elastic membrane (14).

5. A portable rheometer for testing the performance of fluid curing agents according to claim 3, characterized in that, The expansion mechanism includes: The symmetrically distributed second push rods (16) are all installed inside the mounting cylinder (4). The telescopic ends of all the second push rods (16) are fixedly connected to a connecting ring (17). The connecting ring (17) is hinged to a ring-shaped transmission rod (18). The end of the transmission rod (18) away from the connecting ring (17) is hinged to a traction member (19). The mounting cylinder (4) is provided with guide grooves (191) near the traction member (19). The traction member (19) slides within the adjacent guide grooves (191). The traction member (19) is fixedly connected to the elastic ring (15). The upper side of the mounting cylinder (4) is provided with an annular groove (151). The annular groove (151) is used to accommodate the elastic ring (15). The minimum diameter of the annular groove (151) is greater than the maximum diameter of the rotor.

6. A portable rheometer for testing the performance of fluid curing agents according to claim 5, characterized in that, The guide groove (191) is composed of an upper straight part, an inclined part and a lower straight part, and the distance between the center line of the upper straight part and the center line of the lower straight part is equal to the maximum distance between the traction member (19) and the upper side of the mounting cylinder (4) in the vertical direction.

7. A portable rheometer for testing the performance of fluid curing agents according to claim 3, characterized in that, The adsorption mechanism includes: The third push rod (20) is installed inside the mounting cylinder (4). The telescopic end of the third push rod (20) is fixedly connected to the mounting plate (21). The mounting plate (21) is hinged to a ring-shaped support frame (22). The mounting plate (21) and the support frame (22) are jointly bonded with a sealing film (23). The sealing film (23) is in contact with the mounting cylinder (4). The sealing film (23) is bonded with a reset ring (24). The sealing film (23) and the reset ring (24) are both made of elastic material. The mounting plate (21) is equipped with an air pump (25). The middle part of the mounting cylinder (4) is provided with uniformly distributed capillary pores (401).

8. A portable rheometer for testing the performance of fluid curing agents according to claim 7, characterized in that, I-shaped grooves (261) are provided on the mounting cylinder (4) near the guide groove (191). Abutment (26) and T-shaped member (27) are slidably connected in the I-shaped groove (261). The traction member (19) is used to squeeze the adjacent abutment (26). The abutment (26) is slidably connected to the adjacent T-shaped member (27). The T-shaped member (27) is used to squeeze the elastic membrane (14).

9. A portable rheometer for testing the performance of fluid curing agents according to claim 8, characterized in that, A second elastic member (28) is fixed between the abutting member (26) and the adjacent T-shaped member (27). The mounting cylinder (4) is fixed with a limiting strip (29) near the I-shaped groove (261) and is provided with an arc groove (291). The arc groove (291) is used to make way for the deformation of the limiting strip (29). The T-shaped member (27) is provided with a rectangular groove for the limiting strip (29) to be inserted. The traction member (19) is used to squeeze the limiting strip (29).

10. A portable rheometer for testing the performance of fluid curing agents according to claim 9, characterized in that, The limiting strip (29) has an inclined surface on the side near the adjacent T-shaped member (27), which is used to guide the limiting strip (29) into the rectangular groove of the adjacent T-shaped member (27).

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