Acrylate polymerization viscosity measuring device

Abstract

This invention relates to the field of measuring device technology and discloses an acrylate polymerization viscosity measuring device, including a rotor with a lower chamber and an upper chamber inside, the air pressure values ​​inside the lower and upper chambers being adjustable, and an elastic component disposed at the top of the rotor, the elastic component having an adjustable preload. This invention, by incorporating the elastic component, can buffer the instantaneous torque when the upper shell suddenly drives the rotor to rotate, allowing the rotor to start slowly and preventing the formation of a vacuum region inside the sample during rotor rotation, which would cause gas to precipitate and form bubbles. This ensures the accuracy of the data in the test results. Furthermore, the preload of the arc spring in the elastic component can be adjusted in real time by the increase in sample temperature, allowing the elastic component to be adjusted according to the sample temperature and adaptable to various operating environments.

Description

Technical Field

[0001] This invention relates to the field of measuring device technology, and more particularly to a device for measuring the viscosity of acrylate polymers. Background Technology

[0002] Acrylic polymers, as an important class of high-molecular materials, are widely used in construction, automotive, home appliance, packaging, coatings, adhesives, plastic products, and specialty rubber industries due to their excellent light resistance, weather resistance, durability, and adhesive properties. In the production process of acrylic adhesives, viscosity is one of the most critical control indicators. Polymer viscosity not only directly affects the leveling and sagging properties of the coating, but it is also a core basis for judging the progress of the polymerization reaction (i.e., monomer conversion rate and polymer molecular weight growth). Therefore, precise viscosity control is directly related to the quality level and application performance of the final product.

[0003] During the polymerization of acrylates, production personnel need to perform viscosity tests multiple times to accurately determine the degree of polymerization, thereby providing necessary data references for when to add monomers, initiators, or solvents in subsequent polymerization processes.

[0004] Existing rotational viscometers determine viscosity by measuring the resistance encountered by a rotor rotating in a fluid. Since the viscosity of acrylate polymers is measured at different temperatures, as the measurement temperature increases, the sample temperature rises, molecular thermal motion intensifies, the distance between molecules increases, and the interaction forces weaken, making relative movement more likely. This manifests as a decrease in viscosity and an increase in fluidity. If the rotor suddenly rotates during measurement, the liquid layer adhering to the rotor surface, due to the no-slip condition at the liquid-solid interface, is "captured" by the rotor and moves with the rotor surface at the same linear velocity. Liquid moving away from the rotor, at the moment of startup, is further affected by inertia. While stationary and not yet propelled by viscous forces, the liquid is rapidly "pushed" and its pressure increases (forming a high-pressure zone) on the side of the rotor's direction of movement. On the side opposite to the direction of rotation (i.e., the side "behind" the rotor), the rotor surface is actually "tearing" the liquid, attempting to pull it away from its original space. Since the liquid at a distance cannot replenish the liquid in time, a region with a sharp drop in pressure appears on this side. This sudden drop in pressure leads to a decrease in gas solubility, causing gas to precipitate and form bubbles. The bubbles reduce the contact area between the sample and the rotor, resulting in inaccurate data during subsequent viscosity testing and affecting the test results. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an acrylate polymerization viscosity measuring device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An acrylic ester polymerization viscosity measuring device, comprising: The rotor has a lower chamber and an upper chamber inside, and the air pressure inside the lower chamber and the upper chamber can be changed; An elastic component is disposed at the top of the rotor, and the elastic component has an adjustable preload. An upper housing is disposed at the top of the rotor, and the upper housing is configured to rotate relative to the rotor about the central axis of the rotor. The upper housing is coupled to the rotor via an elastic component, and when the upper housing rotates, it can drive the rotor to rotate in the same direction via the elastic component. When the air pressure inside the lower cavity changes, the preload of the elastic component can be adjusted.

[0007] As a further embodiment of the present invention, a lower housing is fixedly provided at the top end of the rotor, the lower housing and the upper housing are interlocked and rotatably installed, a cavity is formed between the lower housing and the upper housing, and the elastic component is disposed inside the cavity.

[0008] As a further aspect of the present invention, the elastic component includes: At least two plates are symmetrically arranged inside the cavity, and the top of the plates are fixedly connected to the top wall of the upper shell; At least two arc-shaped springs are symmetrically arranged inside the cavity, with one end of each arc-shaped spring abutting against the outer surface of the plate. Two limiting sleeves are symmetrically provided on the inner wall of the lower housing, and the other end of the arc spring abuts against the outer surface of the limiting sleeve.

[0009] As a further embodiment of the present invention, the limiting sleeve has a sliding hole inside, and an arc-shaped column is slidably installed between the inner walls of the sliding hole. The other end of the arc-shaped spring is fixedly connected to one end of the arc-shaped column. Two T-shaped arc guide rails are symmetrically fixedly connected to the bottom wall of the lower housing. A connecting block is slidably installed on the outer surface of each of the two T-shaped arc guide rails. The connecting block is fixedly connected to the other end of the arc-shaped column. The connecting block is configured to move closer to or further away from the limiting sleeve along the outer surface of the T-shaped arc guide rail.

[0010] As a further embodiment of the present invention, a ring is rotatably mounted on the bottom wall of the lower housing. One end of the connecting block is fixedly connected to the outer surface of the ring. The ring is configured to rotate relative to the rotor with the central axis of the rotor as the rotation center. A first piston is provided inside the rotor. The first piston is located between the lower cavity and the upper cavity and can move along the central axis of the rotor. A first square column is fixedly connected to the top of the first piston. Two guide columns are symmetrically fixedly connected to the top of the first square column through the bottom wall of the lower housing. Two spiral grooves are symmetrically opened on the outer circumference of the ring. The guide columns are slidably installed with the inner wall of the spiral grooves. The T-shaped arc guide rail, the arc column, and the ring are located at the same center.

[0011] As a further embodiment of the present invention, two cylindrical bodies are symmetrically fixedly connected to the bottom wall of the lower housing. The outer surface of the plate on the side opposite to the arc spring abuts against the outer surface of the cylindrical body. An arc block is fixedly connected to the outer surface of the plate on the side opposite to the arc spring. Multiple locking teeth are equidistantly provided on the upper surface of the arc block, and a gap is provided between two adjacent locking teeth.

[0012] As a further embodiment of the present invention, two circular holes are symmetrically formed through the bottom wall of the lower housing. The circular holes are connected to the interior of the cylinder. A second piston is slidably installed on the inner wall of the circular holes. A second square column is fixedly connected to the top of the second piston. A mounting plate is fixedly connected to the top of the second square column. An elastic block is fixedly installed on the lower surface of the mounting plate. The bottom end of the elastic block is located inside the gap between two adjacent teeth. A stop block is fixedly connected to the lower surface of the mounting plate. The elastic block is located between the stop block and the plate. The outer surface of the stop block abuts against the outer surface of the elastic block.

[0013] As a further embodiment of the present invention, a support block is fixedly installed on the inner wall of the cylinder, the top end of the second square column penetrates the outer surface of the support block and is slidably installed with the support block, a tension spring is sleeved on the outer surface of the second square column, one end of the tension spring is fixedly connected to the outer surface of the support block, the other end of the tension spring is fixedly connected to the outer surface of the second piston, a vent hole is opened through the upper surface of the support block, the round hole is connected to the cavity through the vent hole, a through hole is opened through the top end of the rotor, the through hole penetrates the bottom wall of the lower shell, and the upper cavity is connected to the cavity through the through hole.

[0014] As a further embodiment of the present invention, the arc block and the rotor are located at the same center, a limit post is provided at the position of the second square column near the upper surface of the support block, a first inclined surface is provided on the outer surface of the tooth near the elastic block, a straight surface is provided on the outer surface of the tooth opposite to the first inclined surface, a second inclined surface is provided on the bottom end of the elastic block near the stop block, and an arc angle is provided on the bottom end of the elastic block opposite to the second inclined surface.

[0015] As a further embodiment of the present invention, the lower surface of the connecting block is provided with a T-shaped groove that matches the outer surface of the T-shaped arc guide rail, and the T-shaped arc guide rail is slidably connected to the inner wall of the T-shaped groove.

[0016] This invention uses an elastic component to buffer the instantaneous torque when the upper shell suddenly drives the rotor to rotate, allowing the rotor to start slowly and preventing the formation of a vacuum area inside the sample during rotor rotation. This avoids the formation of gas bubbles inside the sample, thus ensuring the accuracy of the data in the test results. Furthermore, the preload of the arc spring in the elastic component can be adjusted in real time by the increase of the sample temperature, allowing the elastic component to be adjusted according to the sample temperature and adapt to various usage environments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the rotor of the acrylate polymerization viscosity measuring device proposed in this invention; Figure 2 This is a cross-sectional schematic diagram of the upper housing of the acrylic ester polymerization viscosity measuring device proposed in this invention; Figure 3 This is a schematic cross-sectional view of the rotor of the acrylate polymerization viscosity measuring device proposed in this invention; Figure 4 This is a top view of the lower housing of the acrylic ester polymerization viscosity measuring device proposed in this invention; Figure 5 This is a schematic diagram of the first piston of the acrylate polymerization viscosity measuring device proposed in this invention; Figure 6 This is a schematic diagram of the circular ring of the acrylate polymerization viscosity measuring device proposed in this invention; Figure 7 This is a bottom view of the upper housing of the acrylic ester polymerization viscosity measuring device proposed in this invention; Figure 8 This is a partial cross-sectional schematic diagram of the lower housing of the acrylate polymerization viscosity measuring device proposed in this invention; Figure 9 for Figure 8 Enlarged view of a portion of point A in the middle; Figure 10 This is a schematic diagram of the second piston of the acrylate polymerization viscosity measuring device proposed in this invention; Figure 11 This is a schematic diagram of the arc block of the acrylic ester polymerization viscosity measuring device proposed in this invention.

[0018] In the picture: 100, Rotor; 110, Lower cavity; 120, Upper cavity; 130, Through hole; 200, Lower housing; 210, Limiting sleeve; 220, Round hole; 300, Upper housing; 400, First piston; 500, First square post; 510, Guide post; 600, Cavity; 700, Arc Spring; 800, Ring; 810, Spiral Groove; 900, Arc Column; 1000, Connecting Block; 1100, T-shaped Arc Guide Rail; 1200, Plate; 1300, Arc Block; 1310, Clamping Tooth; 1311, Straight Surface; 1312, First Inclined Surface; 1400, Cylinder; 1500, Second Piston; 1600, Second Square Column; 1700, Mounting Plate; 1800, Tension Spring; 1900, Support Block; 2000, Elastic block; 2010, Second inclined plane; 2020, Rounded corner; 2100, Stop block; 2200, Limiting post. 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] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] To avoid creating a negative pressure area in the sample during rotor startup, such as Figure 1 and Figure 2As shown, this invention proposes an acrylate polymerization viscosity measuring device, comprising: a rotor 100, an elastic component, and an upper housing 300. Specifically, the upper housing 300 is disposed at the top of the rotor 100, and the upper housing 300 is configured to rotate relative to the rotor 100 about the central axis of the rotor 100. In use, the upper housing 300 is connected to the output end of a detection rotary motor through a connecting part at the top of the upper housing 300, and the upper housing 300 is driven to rotate through the output end of the rotary motor. Since the upper housing 300 is disposed at the top of the rotor 100, the rotor 100 is driven to rotate through the upper housing 300, and the viscosity is determined by measuring the resistance encountered by the rotor 100 rotating in the fluid. To provide a buffer zone during rotor 100 rotation, an elastic component is disposed at the top of rotor 100. The upper housing 300 is coupled to rotor 100 via the elastic component. When the upper housing 300 rotates, it can drive rotor 100 to rotate in the same direction via the elastic component. The elastic component has an adjustable preload. The preload inside the elastic component can buffer the instantaneous torque when the upper housing 300 suddenly drives rotor 100 to rotate, allowing rotor 100 to start slowly. This avoids the formation of a vacuum area inside the sample when rotor 100 rotates, which would cause gas to precipitate and form bubbles inside the sample, thus ensuring the accuracy of the data in the test results.

[0023] In this embodiment, as the measured temperature increases, the sample temperature rises, molecular thermal motion intensifies, the distance between molecules increases, and the interaction force weakens, making relative movement more likely. This manifests as decreased viscosity and increased fluidity. To enable the rotor 100 to adjust in real time according to the sample temperature, the preload force inside the elastic component needs to be adjusted. When the sample temperature is high and the viscosity decreases, the preload force inside the elastic component needs to be reduced, making the rotor 100 start-up more gentle. To adjust the preload force of the elastic component, the rotor 100 has a lower cavity 110 and an upper cavity 120. The gas pressure values ​​inside the lower cavity 110 and the upper cavity 120 can be changed. When the gas pressure value inside the lower cavity 110 changes, the preload force of the elastic component can be adjusted. In actual use, when the rotor 100 is inside a sample with a high temperature, the gas (e.g., helium) filled inside the lower cavity 110 will expand due to the increased temperature inside the lower cavity 110, thereby adjusting the preload force of the elastic component (the specific adjustment method is detailed below).

[0024] In this embodiment, in order to connect the upper housing 300 and the rotor 100 together, such as Figure 3 As shown, a lower housing 200 is fixedly mounted on the top end of the rotor 100. The lower housing 200 and the upper housing 300 are interlocked and rotatably mounted. A cavity 600 is formed between the lower housing 200 and the upper housing 300, and the elastic component is disposed inside the cavity 600. To enable the elastic component to perform a buffering function, such as... Figure 4 and Figure 6 As shown, the elastic component includes at least two plates 1200 and at least two arc springs 700.

[0025] In this embodiment, specifically, the two plates 1200 are symmetrically arranged inside the cavity 600, such as... Figure 7 As shown, the top of the plate 1200 is fixedly connected to the top wall of the upper shell 300. Two arc-shaped springs 700 are symmetrically arranged inside the cavity 600. One end of the arc-shaped spring 700 abuts against the outer surface of the plate 1200. Two limiting sleeves 210 are symmetrically opened on the inner wall of the lower shell 200. The other end of the arc-shaped spring 700 abuts against the outer surface of the limiting sleeve 210. It should be noted that the arc-shaped spring 700 is in a relaxed state at this time and is not compressed. In actual use, because the lower housing 200 and the upper housing 300 are rotatably connected, when the upper housing 300 suddenly rotates, the lower housing 200 will have a relative displacement relative to the upper housing 300. The rotation of the upper housing 300 will drive the plate 1200 to move closer to the limiting sleeve 210, thereby compressing the arc spring 700. When the arc spring 700 continues to be compressed, it will resist the limiting sleeve 210 through elastic force, thereby driving the lower housing 200 to start rotating slowly in the same direction until the lower housing 200 and the upper housing 300 have the same rotation speed and start to rotate synchronously. In this way, the torque that transmits kinetic energy can be buffered when the upper housing 300 suddenly drives the lower housing 200 to rotate.

[0026] In this embodiment, in order to make the preload of the arc spring 700 adjustable, such as Figure 5 and Figure 6 As shown, the limiting sleeve 210 has a sliding hole inside, and an arc-shaped column 900 is slidably installed between the inner walls of the sliding hole. The other end of the arc-shaped spring 700 is fixedly connected to one end of the arc-shaped column 900. Two T-shaped arc guide rails 1100 are symmetrically fixedly connected to the bottom wall of the lower housing 200. Connecting blocks 1000 are slidably installed on the outer surfaces of the two T-shaped arc guide rails 1100. The connecting blocks 1000 are fixedly connected to the other end of the arc-shaped column 900. It is configured to move closer to or further away from the limiting sleeve 210 along the outer surface of the T-shaped arc guide rail 1100. When the connecting block 1000 moves away from the limiting sleeve 210, the distance between the connecting block 1000 and the plate 1200 increases. At this time, the arc spring 700 is stretched and its preload decreases. Conversely, when the connecting block 1000 moves closer to the limiting sleeve 210, the distance between the connecting block 1000 and the plate 1200 decreases. At this time, the arc spring 700 is compressed and its preload increases.

[0027] It should be noted that, in order to install the connecting block 1000, the lower surface of the connecting block 1000 is provided with a T-shaped groove that matches the outer surface of the T-shaped arc guide rail 1100, and the T-shaped arc guide rail 1100 is slidably connected to the inner wall of the T-shaped groove.

[0028] In this embodiment, in order to move the connecting block 1000 closer to or further away from the limiting sleeve 210, such as Figure 6 As shown, a ring 800 is rotatably mounted on the bottom wall of the lower housing 200. One end of the connecting block 1000 is fixedly connected to the outer surface of the ring 800. The ring 800 is configured to rotate relative to the rotor 100 with the central axis of the rotor 100 as the rotation center. When the ring 800 rotates clockwise, it drives the connecting block 1000 to move closer to the limiting sleeve 210. When the ring 800 rotates counterclockwise, it drives the connecting block 1000 to move away from the limiting sleeve 210.

[0029] In this embodiment, in order to reduce the preload of the arc spring 700 when the sample temperature rises, i.e., the ring 800 reverses, causing the connecting block 1000 to move away from the limiting sleeve 210, such as... Figure 3 and Figure 5 As shown, a first piston 400 is disposed inside the rotor 100. The first piston 400 is located between the lower cavity 110 and the upper cavity 120 and can move along the central axis of the rotor 100. A first square post 500 is fixedly connected to the top of the first piston 400. Two guide posts 510 are symmetrically fixedly connected to the top of the first square post 500 through the bottom wall of the lower housing 200. Two spiral grooves 810 are symmetrically formed on the outer circumference of the annulus 800. The guide posts 510 slide against the inner wall of the spiral grooves 810. The first piston 400 is slidably installed inside the rotor 100. When the gas inside the lower cavity 110 is heated and expands, it will drive the first piston 400 to move upward, thereby driving the first square column 500 to move upward. The first square column 500, through the cooperation of the guide column 510 and the spiral groove 810, drives the ring 800 to reverse, thereby driving the connecting block 1000 to move away from the limiting sleeve 210. In order to correctly realize the above process, the T-shaped arc guide rail 1100, the arc column 900 and the ring 800 are set at the same center.

[0030] It should be noted that in order for the guide post 510 to drive the ring 800 through the driving spiral groove 810, and for the ring 800 to not drive the guide post 510 in the opposite direction through the spiral groove 810, the angle between the spiral groove 810 and the horizontal plane is 60°. This makes the spiral helix angle of the spiral groove 810 large enough to prevent the reaction force of the arc spring 700 from driving the ring 800 to move the first square post 500 downward through the spiral groove 810 and the guide post 510. That is, the large spiral helix angle of the spiral groove 810 and the guide post 510 are used to self-lock, and the ring 800 can only rotate forward when the first square post 500 moves downward actively.

[0031] In this embodiment, in order to adjust the preload of the arc spring 700, the arc spring 700 initially has a certain preload. Since the lower housing 200 and the upper housing 300 are rotatably mounted, to limit the initial position between the upper housing 300 and the lower housing 200, as follows... Figure 6 As shown, two cylindrical bodies 1400 are symmetrically fixedly connected to the bottom wall of the lower housing 200. The outer surface of the plate 1200 on the side opposite to the arc spring 700 abuts against the outer surface of the cylindrical body 1400. The position of the plate 1200 is blocked by the cylindrical body 1400. Since the arc spring 700 has a preload at the beginning, the position between the lower housing 200 and the upper housing 300 is restricted.

[0032] When the upper housing 300 suddenly rotates, it will cause the plate 1200 to compress the arc spring 700. Simultaneously, the compression of the arc spring 700 will cause the lower housing 200 to rotate. Since viscosity measurement is subsequently performed using the rotation of the rotor 100, the rotor 100 needs to rotate in perfect sync with the upper housing 300. Therefore, after the arc spring 700 completes its buffering process, it needs to maintain its current compressed state. To achieve this, as follows... Figure 6 , Figure 8 and Figure 9 As shown, an arc block 1300 is fixedly connected to the outer surface of the plate 1200 on the side opposite to the arc spring 700, as... Figure 10As shown, the upper surface of the arc block 1300 is provided with multiple equidistant locking teeth 1310, and a gap is provided between two adjacent locking teeth 1310. The bottom wall of the lower housing 200 is symmetrically provided with two circular holes 220, which are connected to the interior of the cylinder 1400. A second piston 1500 is slidably installed on the inner wall of the circular hole 220. A second square column 1600 is fixedly connected to the top of the second piston 1500. A mounting plate 1700 is fixedly connected to the top of the second square column 1600. An elastic block 2000 is fixedly installed on the lower surface of the mounting plate 1700. The bottom end of the elastic block 2000 is located inside the gap between two adjacent locking teeth 1310. When the plate 1200 compresses the arc spring 700, it will move closer to the limiting sleeve 210. At this time, the plate 1200 drives the arc block 1300 to move closer to the limiting sleeve 210, so that the locking teeth 1310 on the arc block 1300 pass over the bottom of the elastic block 2000. Because the elastic block 2000 has elastic deformation capability, when the locking teeth 1310 abut against the elastic block 2000, the elastic block 2000 can be squeezed and deformed. At this time, the elastic block 2000 can pass over the adjacent locking teeth 1310. After the force between the lower shell 200 and the upper shell 300 is balanced, the two no longer move relative to each other. At this time, the elastic block 2000 is inserted into the gap, thereby restricting the position of the arc block 1300, and thus restricting the position between the lower shell 200 and the upper shell 300, so that they no longer slide relative to each other, thereby ensuring that the lower shell 200 will not run in the opposite direction relative to the upper shell 300.

[0033] In order for the elastic block 2000 to undergo elastic deformation when the arc block 1300 moves close to the limiting sleeve 210, allowing the elastic block 2000 to pass over the locking tooth 1310, and conversely, when the elastic block 2000 tends to move away from the limiting sleeve 210, the elastic block 2000 will not undergo elastic deformation. A stop block 2100 is fixedly connected to the lower surface of the mounting plate 1700. The elastic block 2000 is disposed between the stop block 2100 and the plate body 1200. The outer surface of the stop block 2100 abuts against the outer surface of the elastic block 2000. The stop block 2100 blocks the elastic block 2000 in another direction, preventing the elastic block 2000 from undergoing elastic deformation when it abuts against the locking tooth 1310.

[0034] In this embodiment, in order to install the elastic block 2000 and ensure that the elastic block 2000 has a fixed position within the lower housing 200, such as... Figure 8 and Figure 9As shown, a support block 1900 is fixedly installed on the inner wall of the cylinder 1400. The top end of the second square column 1600 passes through the outer surface of the support block 1900 and is slidably installed with the support block 1900. A tension spring 1800 is sleeved on the outer surface of the second square column 1600. One end of the tension spring 1800 is fixedly connected to the outer surface of the support block 1900, and the other end of the tension spring 1800 is fixedly connected to the outer surface of the second piston 1500.

[0035] When the rotor 100 is placed inside the sample to be tested, the expansion of the gas inside the lower chamber 110 causes the first piston 400 to move upward, which in turn compresses the space inside the upper chamber 120, increasing the air pressure inside the upper chamber 120. Since the upper surface of the support block 1900 has a through-hole, the circular hole 220 is connected to the cavity 600 through the through-hole. The top of the rotor 100 has a through-hole 130, which penetrates the bottom wall of the lower housing 200. The upper chamber 120 is connected to the cavity 600 through the through-hole 130. When the pressure in the upper chamber 120 increases, it will drive the second piston 1500 to move downward, which in turn drives the elastic block 2000 to move downward through the second square column 1600 and the mounting plate 1700, allowing it to be inserted into the gap between two adjacent locking teeth 1310.

[0036] In order to limit the downward movement height of the elastic block 2000 and ensure that the elastic resistance value of the elastic block 2000 to the clamping tooth 1310 is constant when the clamping tooth 1310 squeezes the elastic block 2000, a limiting post 2200 is provided on the second square post 1600 near the upper surface of the support block 1900. The limiting post 2200 abuts against the upper surface of the support block 1900, thereby limiting the downward movement distance of the elastic block 2000.

[0037] In this embodiment, in order for the elastic block 2000 to easily pass over the surface of the tooth 1310, such as Figure 10 and Figure 11As shown, the outer surface of the retaining tooth 1310 near the elastic block 2000 has a first inclined surface 1312, and the outer surface of the retaining tooth 1310 opposite to the first inclined surface 1312 has a straight surface 1311. The bottom end of the elastic block 2000 near the stop block 2100 has a second inclined surface 2010. When the first inclined surface 1312 and the second inclined surface 2010 are in contact, the inclined surfaces make it easier for the elastic block 2000 to pass over the retaining tooth 1310. When the forces between the lower housing 200 and the upper housing 300 are balanced, the elastic block 2000 will no longer pass over the retaining tooth 1310. In order to limit the position of the elastic block 2000, the straight surface 1311 will abut against the outer surface of the second inclined surface 2010, thereby preventing the elastic block 2000 from moving in the opposite direction until the rotor 100 is removed from the sample. At this time, the temperature is getting lower and lower, and the tension spring 1800... The force causes the elastic block 2000 to slowly move upward and be pulled out of the gap. To prevent the lower housing 200 from suddenly rotating relative to the upper housing 300 under the elastic force of the arc spring 700 when the elastic block 2000 leaves the gap, which would cause the plate 1200 to quickly impact the cylinder 1400 and damage the device, the bottom end of the elastic block 2000 is provided with an arc angle 2020 on the side opposite to the second inclined surface 2010. When the elastic block 2000 gradually moves upward, only the arc angle 2020 will contact the first inclined surface 1312. At this time, the force point of the elastic block 2000 is on the arc angle 2020. In addition, the elastic block 2000 moves upward a certain distance, which increases the torque at this force point. At this time, the elastic block 2000 can undergo slight elastic deformation and pass over the top of each tooth 1310. Through the blocking of each tooth 1310, the impact force is greatly reduced.

[0038] In this embodiment, the first square column 500 and the second square column 1600 are square in shape so that they cannot rotate and can only move along their own axial direction; in order for the arc block 1300 to match the elastic block 2000, the arc block 1300 and the rotor 100 are located at the same center.

[0039] In this embodiment, the angle between the straight surface 1311 and the horizontal plane is 90°, the angle between the first inclined surface 1312 and the horizontal plane is 45°, and the second inclined surface 2010 is matched with the first inclined surface 1312 and has an angle of 45° with the horizontal plane.

[0040] It should be noted that this solution avoids the torque being rigidly transmitted to the rotor 100 as soon as the motor starts rotating through a mechanical means. This adjustment is purely mechanical feedback, which can prevent electromagnetic interference and avoid sensor failure.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An acrylic ester polymerization viscosity measuring device, characterized in that, include: The rotor (100) has a lower chamber (110) and an upper chamber (120) inside, and the air pressure inside the lower chamber (110) and the upper chamber (120) can be changed; An elastic component is disposed at the top of the rotor (100), and the elastic component has an adjustable preload. An upper housing (300) is disposed at the top of the rotor (100), and the upper housing (300) is configured to rotate relative to the rotor (100) about the central axis of the rotor (100); The upper housing (300) is coupled to the rotor (100) through an elastic component, and when the upper housing (300) rotates, it can drive the rotor (100) to rotate in the same direction through the elastic component; When the air pressure inside the lower cavity (110) changes, the preload of the elastic component can be adjusted.

2. The acrylate polymerization viscosity measuring device according to claim 1, characterized in that, The rotor (100) has a lower housing (200) fixedly installed at its top end. The lower housing (200) and the upper housing (300) are interlocked and rotated together. A cavity (600) is formed between the lower housing (200) and the upper housing (300). The elastic component is disposed inside the cavity (600).

3. The acrylate polymerization viscosity measuring device according to claim 2, characterized in that, The elastic component includes: At least two plates (1200) are symmetrically arranged inside the cavity (600), and the top of the plates (1200) is fixedly connected to the top wall of the upper shell (300); At least two arc-shaped springs (700) are symmetrically arranged inside the cavity (600), and one end of the arc-shaped springs (700) abuts against the outer surface of the plate (1200); The inner wall of the lower housing (200) has two symmetrically arranged limiting sleeves (210), and the other end of the arc spring (700) abuts against the outer surface of the limiting sleeve (210).

4. The acrylate polymerization viscosity measuring device according to claim 3, characterized in that, The limiting sleeve (210) has a sliding hole inside, and an arc-shaped column (900) is slidably installed between the inner walls of the sliding hole. The other end of the arc-shaped spring (700) is fixedly connected to one end of the arc-shaped column (900). Two T-shaped arc guide rails (1100) are symmetrically fixedly connected to the bottom wall of the lower housing (200). Connecting blocks (1000) are slidably installed on the outer surfaces of the two T-shaped arc guide rails (1100). The connecting blocks (1000) are fixedly connected to the other end of the arc-shaped column (900). The connecting blocks (1000) are configured to move closer to or further away from the limiting sleeve (210) along the outer surface of the T-shaped arc guide rails (1100).

5. The acrylate polymerization viscosity measuring device according to claim 4, characterized in that, A ring (800) is rotatably mounted on the bottom wall of the lower housing (200). One end of the connecting block (1000) is fixedly connected to the outer surface of the ring (800). The ring (800) is configured to rotate relative to the rotor (100) with the central axis of the rotor (100) as the rotation center. A first piston (400) is provided inside the rotor (100). The first piston (400) is located between the lower cavity (110) and the upper cavity (120) and can rotate along the central axis of the rotor (100). The first piston (400) is fixedly connected to a first square column (500) at its top end. The top end of the first square column (500) is symmetrically connected to two guide columns (510) through the bottom wall of the lower housing (200). The outer circumference of the ring (800) is symmetrically provided with two spiral grooves (810). The guide columns (510) are slidably installed on the inner wall of the spiral grooves (810). The T-shaped arc guide rail (1100), the arc column (900) and the ring (800) are located at the same center.

6. The acrylate polymerization viscosity measuring device according to claim 3, characterized in that, The bottom wall of the lower housing (200) is symmetrically fixedly connected to two cylindrical bodies (1400). The outer surface of the plate (1200) on the side opposite to the arc spring (700) abuts against the outer surface of the cylindrical body (1400). An arc block (1300) is fixedly connected to the outer surface of the plate (1200) on the side opposite to the arc spring (700). Multiple locking teeth (1310) are equidistantly provided on the upper surface of the arc block (1300), and a gap is provided between two adjacent locking teeth (1310).

7. The acrylate polymerization viscosity measuring device according to claim 6, characterized in that, The bottom wall of the lower housing (200) has two symmetrically through holes (220), which are connected to the interior of the cylinder (1400). A second piston (1500) is slidably installed on the inner wall of the holes (220). A second square column (1600) is fixedly connected to the top of the second piston (1500). A mounting plate (1700) is fixedly connected to the top of the second square column (1600). An elastic block (2000) is fixedly installed on the lower surface of the mounting plate (1700). The bottom end of the elastic block (2000) is located inside the gap between two adjacent teeth (1310). A stop block (2100) is fixedly connected to the lower surface of the mounting plate (1700). The elastic block (2000) is located between the stop block (2100) and the plate (1200). The outer surface of the stop block (2100) abuts against the outer surface of the elastic block (2000).

8. The acrylate polymerization viscosity measuring device according to claim 7, characterized in that, A support block (1900) is fixedly installed on the inner wall of the cylinder (1400). The top end of the second square column (1600) passes through the outer surface of the support block (1900) and is slidably installed with the support block (1900). A tension spring (1800) is sleeved on the outer surface of the second square column (1600). One end of the tension spring (1800) is fixedly connected to the outer surface of the support block (1900), and the other end of the tension spring (1800) is fixedly connected to the outer surface of the second piston (1500). A vent hole is opened through the upper surface of the support block (1900). The round hole (220) is connected to the cavity (600) through the vent hole. A through hole (130) is opened through the top end of the rotor (100). The through hole (130) passes through the bottom wall of the lower housing (200). The upper cavity (120) is connected to the cavity (600) through the through hole (130).

9. The acrylate polymerization viscosity measuring device according to claim 8, characterized in that, The arc block (1300) and the rotor (100) are located at the same center. The second square column (1600) has a limit post (2200) near the upper surface of the support block (1900). The outer surface of the tooth (1310) near the elastic block (2000) has a first inclined surface (1312). The outer surface of the tooth (1310) opposite to the first inclined surface (1312) has a straight surface (1311). The bottom end of the elastic block (2000) near the stop block (2100) has a second inclined surface (2010). The bottom end of the elastic block (2000) opposite to the second inclined surface (2010) has a rounded corner (2020).

10. The acrylate polymerization viscosity measuring device according to claim 4, characterized in that, The lower surface of the connecting block (1000) is provided with a T-shaped groove that matches the outer surface of the T-shaped arc guide rail (1100), and the T-shaped arc guide rail (1100) is slidably connected to the inner wall of the T-shaped groove.

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