Fixing clamp for rotational rheometer

Abstract

The invention relates to the technical field of rotational rheometers, and discloses a stationary fixture for a rotational rheometer, the stationary fixture comprises a base, a fixture assembly arranged on the base, a scraping assembly arranged on the fixture assembly and a jacking frame for driving the fixture assembly, and the fixture assembly comprises an upper pressing plate and a lower pressing plate mounted at the top of the base. According to the fixing clamp for the rotational rheometer, when the lifting frame moves downwards and the upper pressing plate can be driven to move downwards through the spring set, the upper pressing plate can preferentially press and clamp a sample on the lower pressing plate, and after clamping, concave material receiving grooves of the two material scraping assemblies can be driven to vertically move up and down through the downward movement of the lifting frame; and receiving and cleaning work is synchronously carried out, so that the redundant slurry cleaning effect is improved, the driving force of the rotational rheometer is effectively utilized, an electric driving source does not need to be independently arranged for driving, and the energy-saving and environment-friendly properties of the fixing clamp are improved.

Description

Technical Field

[0001] The invention relates to the technical field of rotational rheometers, in particular to a fixing fixture used for rotational rheometers. Background Art

[0002] The rotational rheometer measurement system measures torque under stable or variable speed conditions, and uses the fixture factor to convert physical quantities into rheological parameters. Through rotation or shear motion, it simulates external construction conditions and can quickly measure the viscosity, modulus, molecular weight and other properties of materials such as rubber, emulsions, and coatings. Currently, before the rheometer is tested, the sample must be loaded between the upper and lower fixtures, and the excess sample must be manually removed to prevent the excess sample from interfering with the test. However, the manual removal method is too cumbersome and affects work efficiency.

[0003] After searching, the Chinese utility model patent with publication number CN219675764U discloses a rotational rheometer, which places a slurry sample on the surface of the lower clamping plate facing away from the base, and the upper clamping plate and the lower clamping plate move relative to each other in the vertical direction to extrude the slurry to obtain a sample of preset thickness. When the scraper assembly and / or the clamp assembly move relative to each other in the vertical direction, the scraper can scrape off excess slurry of the sample, so that the sample has an outer edge shape of a preset size.

[0004] After the clamp assembly in the above-mentioned rotational rheometer clamps the sample, the scraper member in the clamp assembly can scrape off the excess sample by moving the scraper member up and down. The scraper member is an annular scraper block. Although the excess sample can be scraped off when the annular scraper block moves up and down, it is not convenient to store the scraped excess sample, so that the annular scraper block will squeeze the collected sample when it is reset, causing the scraped sample to be scattered, thereby increasing the difficulty of subsequent cleaning. In addition, the scraper end of the scraper assembly needs to be manually operated or an additional electric drive source is set to drive it. The driving force of the instrument itself cannot be utilized, and the function of linkage is lacking. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the present invention provides a fixing fixture for a rotational rheometer, which can drive the upper pressure plate to move downward through the downward movement of the lifting frame and the spring group, and the upper pressure plate can preferentially press and clamp the sample on the lower pressure plate. After clamping, the downward movement of the lifting frame can drive the concave receiving troughs of the two scraper assemblies to move vertically up and down, and simultaneously perform the receiving work to scrape and clean the excess slurry, which not only improves the effect of removing the excess slurry, but also effectively utilizes the driving force of the rotational rheometer. There is no need to set up a separate electric drive source for driving, thereby improving the energy saving and environmental protection of the fixing fixture, and solving the problem that the scraper component in the fixing fixture in the prior art needs to be manually operated, or an additional electric drive source is set up for driving, and the driving force of the instrument itself cannot be utilized, and there is a lack of linkage and combination functions.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fixed fixture for a rotational rheometer, comprising a base, a fixture assembly arranged on the base, a scraper assembly arranged on the fixture assembly, and a lifting frame for driving the fixture assembly, wherein the fixture assembly comprises an upper pressing plate and a lower pressing plate installed on the top of the base, and a rotating member for rotating and driving the upper pressing plate is arranged on the lifting frame;

[0009] The scraper assembly includes a scraper end for scraping the sample between the upper pressing plate and the lower pressing plate, and the scraper end of the scraper assembly is transmission-connected to the lifting frame that moves up and down or to the rotating end of the rotating member;

[0010] When the scraper assembly moves in a vertical direction or in a circular direction along the fixture assembly, the scraper end of the scraper assembly scrapes off excess slurry from the sample.

[0011] Preferably, the lifting frame includes a guide rod fixed to the top of the base, and the outer surface of the guide rod is sequentially sleeved with a lifting frame and a connecting plate from top to bottom, and a spring group is fixedly connected between the lifting frame and the connecting plate; and one side of the connecting plate is rotatably connected to the rotating shaft at the top of the upper pressure plate.

[0012] Preferably, the outer surface of the lower pressing plate is sleeved with a ring-shaped concave material receiving groove, and the scraper assembly includes a U-shaped frame fixed to the top of the base, the top of the U-shaped frame is rotatably connected to an inclined L-shaped frame through a rotating shaft, and one end of the L-shaped frame is hinged to a hinge seat, and the hinge seat is slidably connected to the bottom of the concave material receiving groove;

[0013] The lifting frame is provided with a driving member for causing the L-shaped frame to move in a fan shape with the rotating shaft as the center;

[0014] The scraper components are in two groups and are symmetrically arranged. The angle of the L-shaped frame is greater than ninety degrees.

[0015] Preferably, the driving member comprises a pressing plate fixed to the bottom of the lifting frame through a bracket and a roller rotatably connected to the top of the L-shaped frame, and a torsion spring is provided at the rotating end of the L-shaped frame;

[0016] The outer surface of the guide rod is provided with a limiting plate for limiting the downwardly moving connecting plate, and the height of the limiting plate is adjustable.

[0017] Preferably, the scraper assembly includes an annular gear disk rotatably connected to the top of the base, and a scraper member is arranged on the top of the annular gear disk, the top of the base is rotatably connected to a driving gear meshing with the outer surface of the annular gear disk through a rotating shaft, the axis of the driving gear is fixedly connected to a telescopic rod, and the top end of the telescopic rod is transmission-connected to the jacking frame, and the telescopic rod is transmission-connected to the rotating end of the rotating member.

[0018] Preferably, the rotating member includes a motor fixed on the jacking frame, the motor output shaft is connected to two belt sets through two one-way bearings, and the motor is respectively connected to the rotating shafts of the telescopic rod and the upper pressure plate through the two belt sets.

[0019] Preferably, the scraper member includes a movable block connected to the top of the annular gear disk, and an arc-shaped scraper frame is detachably installed on the top of the movable block, one side of the arc-shaped scraper frame is fixedly connected to a storage barrel with an open top, a cover plate is provided on the top of the storage barrel, and the bottom of the cover plate is connected to a material receiving barrel via a connecting rod.

[0020] Preferably, the top of the annular gear disk is fixedly connected to an L-shaped plate, and the bottom of the movable block is slidably connected to the top of the L-shaped plate, and the inside of the L-shaped plate is fixedly connected to an elastic member for elastically squeezing the movable block, and the top of the base is fixedly connected to a raised ring for raising the movable block through a bracket.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the present invention provides a fixing fixture for a rotational rheometer, which has the following beneficial effects:

[0023] 1. The present invention can drive the upper pressure plate to move downward through the spring group through the downward movement of the lifting frame, and the upper pressure plate can preferentially press and clamp the sample on the lower pressure plate. After clamping, the downward movement of the lifting frame can drive the concave receiving grooves of the two scraping assemblies to move vertically up and down, and perform the receiving work synchronously to scrape and clean the excess slurry, which not only improves the effect of removing the excess slurry, but also effectively utilizes the driving force of the rotational rheometer, without the need to set up a separate electric drive source for driving, thereby improving the energy saving and environmental protection of the fixing fixture.

[0024] 2. The present invention can not only drive the upper pressure plate to rotate to form slurry detection work through the setting of the rotating part, but also drive the driving gear to rotate through the telescopic rod, and then drive the scraper to perform circular motion through the annular gear disk, so as to scrape off the excess slurry between the upper pressure plate and the lower pressure plate, improve its slurry detection effect, effectively utilize the rotational driving force of the upper pressure plate, and there is no need to set up an electric drive source separately for driving, thereby improving the functionality and energy-saving and environmental protection of the fixing fixture, and solving the problem in the prior art that the fixing fixture in the rotational rheometer needs to be manually processed or additionally processed by an electric drive source when detecting the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the first embodiment of the present invention;

[0026] Figure 2 For the present invention Figure 1 The structural diagram of the middle scraper assembly;

[0027] Figure 3 For the present invention Figure 2 A bottom view of the structure of the middle scraper assembly;

[0028] Figure 4 For the present invention Figure 3 Schematic diagram of the connection between the middle U-shaped frame and the L-shaped frame;

[0029] Figure 5 For the present invention Figure 1 Structural schematic diagram of the middle jacking frame;

[0030] Figure 6 is a schematic structural diagram of a second embodiment of the present invention;

[0031] Figure 7 For the present invention Figure 6 Structural side view of the middle jacking frame;

[0032] Figure 8 For the present invention Figure 6 Schematic diagram of the structure of the middle base;

[0033] Fig. 9 For the present invention Figure 8 A schematic diagram of the structure of the middle scraper;

[0034] Fig.10 For the present invention Fig. 9 Structural cross-sectional view of the middle scraper.

[0035] In the figure: 1. base;

[0036] 2. Clamp assembly; 21. Upper pressing plate; 22. Lower pressing plate;

[0037] 3. Scraper assembly; 31. Concave receiving trough; 32. U-shaped frame; 33. L-shaped frame; 34. Articulated seat; 35. Pressing plate; 36. Roller; 37. Driving gear; 38. Ring gear plate;

[0038] 39, scraper; 391, movable block; 392, arc-shaped scraper frame; 393, storage barrel; 394, cover plate; 395, receiving barrel; 396, L-shaped plate; 397, elastic member; 398, raised ring;

[0039] 4. Lifting frame; 41. Guide rod; 42. Lifting frame; 43. Connecting plate; 44. Spring assembly; 45. Limiting plate; 46. Telescopic rod;

[0040] 5. Sample; 6. Motor; 7. Belt set. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Embodiment 1:

[0043] Refer to the attached Figure 1-5 A fixed fixture for a rotational rheometer, comprising a base 1, a fixture assembly 2 arranged on the base 1, a scraper assembly 3 arranged on the fixture assembly 2, and a lifting frame 4 for driving the fixture assembly 2, wherein the fixture assembly 2 comprises an upper pressing plate 21 and a lower pressing plate 22 installed on the top of the base 1, and a rotating member for rotating and driving the upper pressing plate 21 is arranged on the lifting frame 4;

[0044] The lifting frame 4 is connected to the telescopic cylinder used to drive the upper pressing plate 21 to move up and down in the rotational rheometer, and a sensor group for detection is arranged on the rotating shaft on the upper pressing plate 22, and the rotating member adopts a rotating mechanism used in the prior art for rotating the upper pressing plate 21, including a motor;

[0045] The scraper assembly 3 includes a scraper end for scraping the sample 5 between the upper pressing plate 21 and the lower pressing plate 22, and the scraper end of the scraper assembly 3 is transmission-connected to the lifting frame 4 that moves up and down or to the rotating end of the rotating member;

[0046] By the up and down movement of the lifting frame 4, the scraping end of the scraper assembly 3 can be moved up and down, and then the excess slurry clamped by the clamp assembly 2 can be removed. By setting the rotating part, not only the upper pressing plate 21 can be driven to rotate, but also the scraping end of the scraper assembly 3 can be moved in a circular motion along the outer surfaces of the upper pressing plate 21 and the lower pressing plate, so as to remove and collect the excess slurry.

[0047] When the scraper assembly 3 moves in the vertical direction or in the annular direction of the clamp assembly 2, the scraper end of the scraper assembly 3 scrapes off the excess slurry of the sample 5;

[0048] When the scraper assembly 3 moves in the vertical direction, the excess slurry on the clamp assembly 2 can be processed. When the scraper assembly 3 moves in the annular direction of the clamp assembly 2, the excess slurry on the clamp assembly 2 can be processed. It has a multi-mode processing function and effectively utilizes the driving force of the rotational rheometer. There is no need to set up a separate electric drive source for driving, thereby improving the energy saving and environmental protection of the fixed clamp.

[0049] Refer to the attached Figure 5 The lifting frame 4 includes a guide rod 41 fixed to the top of the base 1, and the outer surface of the guide rod 41 is sequentially sleeved with a lifting frame 42 and a connecting plate 43 from top to bottom, and a spring group 44 is fixedly connected between the lifting frame 42 and the connecting plate 43; and one side of the connecting plate 43 is rotatably connected to the rotating shaft at the top of the upper pressing plate 21;

[0050] The lifting frame 42 and the connecting plate 43 are connected by a spring group 44, so that when the lifting frame 42 moves up and down, the connecting plate 43 can be driven up and down by the spring group 44, and then the upper pressing plate 21 can be driven up and down by the rotating shaft to form a clamping operation;

[0051] When the lifting frame 42 moves downward and the upper pressure plate 21 is driven to move downward by the spring group 44, the upper pressure plate 21 can preferentially press and clamp the sample 5 on the lower pressure plate 22. After clamping, the lifting frame 42 moves downward to drive the scraping ends of the two scraper assemblies 3 to move vertically up and down, thereby scraping and cleaning the excess slurry.

[0052] Refer to the attached Figures 1 to 4 The outer surface of the lower pressing plate 21 is sleeved with a ring-shaped concave material receiving groove 31, and the scraper assembly 3 includes a U-shaped frame 32 fixed to the top of the base 1, and the top of the U-shaped frame 32 is rotatably connected to an inclined L-shaped frame 33 through a rotating shaft, and one end of the L-shaped frame 33 is hinged to a hinge seat 34, and the hinge seat 34 is slidably connected to the bottom of the concave material receiving groove 31;

[0053] By the upward movement of the concave receiving groove 31, the excess slurry after lamination can be scraped off, and the receiving work can be performed simultaneously to improve the removal effect of the excess slurry. The height of the upward movement of the concave receiving groove 31 is greater than the height of the upper pressing plate 21 after the downward movement, so as to avoid the existence of the concave receiving groove 31 affecting the normal rotation of the upper pressing plate 21.

[0054] The lifting frame 42 is provided with a driving member for causing the L-shaped frame 33 to move in a fan shape with the rotating axis as the center;

[0055] The driving member is used to drive the L-shaped frame 33 in a fan-shaped manner, so that one end of the L-shaped frame 33 moves upward in a fan-shaped manner, and then the concave receiving groove 31 can be lifted upward in cooperation with the slidingly connected hinge seat 34, so that the excess slurry after pressing can be processed;

[0056] The scraper assembly 3 is in two groups and is symmetrically arranged, and the angle of the L-shaped frame 33 is greater than ninety degrees;

[0057] By having two groups of scraper assemblies 3 and symmetrically arranged, the balance of the up and down movement of the concave receiving trough 31 can be improved; by having the angle of the L-shaped frame 33 greater than ninety degrees, the L-shaped frame 33 can be better driven in a fan shape.

[0058] Refer to the attached Figures 1 to 5 , the driving member includes a pressing plate 35 fixed to the bottom of the lifting frame 42 through a bracket and a roller 36 rotatably connected to the top of the L-shaped frame 33, and a torsion spring is provided at the rotating end of the L-shaped frame 33;

[0059] The pressing plate 35 is fixedly connected to the lifting frame 42 by a bracket, so that when the lifting frame 42 moves downward, the pressing plate 35 can press the inclined L-shaped frame 33, thereby causing the inclined L-shaped frame 33 to move in a fan shape with the rotation axis as the center;

[0060] The top of the L-shaped frame 33 is rotatably connected with a roller 36. The setting of the roller 36 not only reduces the friction between the L-shaped frame 33 and the pressing plate 35, but also improves the smoothness of the rolling of the roller 36 when the pressing plate 35 is pressed downward, thereby improving the convenience of the fan-shaped drive of the L-shaped frame 33.

[0061] The outer surface of the guide rod 41 is provided with a limiting plate 45 for limiting the downwardly moving connecting plate 43, and the height of the limiting plate 45 is adjustable;

[0062] By setting the limiting plate 45, it is used to limit the downward moving connecting plate 43, and indirectly limit the depth of the downward moving upper pressing plate 21, thereby improving its subsequent slurry clamping effect. By setting different heights of the limiting plate 45, the depth of the downward movement of the upper pressing plate 21 can be adjusted to meet the clamping work of different slurries.

[0063] Embodiment 2: Based on embodiment 1, the difference is that;

[0064] Refer to the attached Figure 5-Figure 10 The scraper assembly 3 includes an annular toothed disc 38 rotatably connected to the top of the base 1, and a scraper member 39 is provided on the top of the annular toothed disc 38. The top of the base 1 is rotatably connected to a driving gear 37 meshing with the outer surface of the annular toothed disc 38 through a rotating shaft. The axis of the driving gear 37 is fixedly connected to a telescopic rod 46, and the top end of the telescopic rod 46 is transmission-connected to the jacking frame 4, and the telescopic rod 46 is transmission-connected to the rotating end of the rotating member.

[0065] Through the setting of the rotating part, not only can the upper pressure plate 21 be driven to rotate to form a slurry detection work, but also the driving gear 37 can be driven to rotate through the telescopic rod 46, and then the scraper 39 can be driven to perform a circular motion through the annular toothed disk 38, so as to scrape off the excess slurry between the upper pressure plate 21 and the lower pressure plate 22, thereby improving its slurry detection effect, and effectively utilizing the rotational driving force of the upper pressure plate 21. There is no need to set up an electric drive source separately for driving, thereby improving the functionality and energy-saving and environmental protection of the fixing fixture, and solving the problem that the fixing fixture in the rotational rheometer in the prior art needs to be manually processed or additionally processed by an electric drive source when detecting the sample 5.

[0066] Refer to the attached Figure 7 The rotating member includes a motor 6 fixed on the jacking frame 4, the output shaft of the motor 6 is connected to two belt sets 7 through two one-way bearings, and the motor 6 is respectively connected to the rotating shaft of the telescopic rod 46 and the upper pressure plate 21 through the two belt sets 7;

[0067] The motor 6 is connected to an external power supply and a control switch, and is a forward and reverse motor, and is set up using the connection method and encoding method of the prior art, and is used to drive the two belt groups 7 to rotate. The two belt groups 7 can not only drive the upper pressing plate 21 to rotate to form a slurry detection work, but also drive the telescopic rod 46 to rotate, and indirectly drive the scraper 39 to move along the annular trajectory of the upper pressing plate 21 and the lower pressing plate 22 to form a redundant slurry scraping work;

[0068] Both belt sets 7 are connected to the motor 6 via two one-way bearings, and both one-way bearings are installed in an opposite locking manner, so that when the motor 6 rotates clockwise, it can drive one of the belt sets 7 to rotate, and when it rotates counterclockwise, it can drive the other belt set 7 to rotate.

[0069] Refer to the attached Fig. 9 and Fig.10The scraper 39 includes a movable block 391 connected to the top of the annular toothed disc 38, and a curved scraper frame 392 is detachably mounted on the top of the movable block 391. A material storage barrel 393 with an open top is fixedly connected to one side of the curved scraper frame 392. A cover plate 394 is provided on the top of the material storage barrel 393, and a material receiving barrel 395 is connected to the bottom of the cover plate 394 through a connecting rod.

[0070] The arc-shaped scraper frame 392 moves along the outer surface trajectory of the upper pressing plate 21 and the lower pressing plate 22 to scrape off the excess slurry of the sample 5, and the arc-shaped scraper frame 392 guides the excess slurry to the storage barrel 393, and stores it through the receiving barrel 395 in the storage barrel 393. This can not only effectively avoid the diffusion of excess slurry and cause large-scale contamination of the fixture, but also improve the convenience of subsequent excess slurry processing by concentrating the storage of excess slurry in a designated area.

[0071] Refer to the attached Fig. 9 and Fig.10 , the top of the annular toothed disc 38 is fixedly connected with an L-shaped plate 396, and the bottom of the movable block 391 is slidably connected to the top of the L-shaped plate 396, and the inside of the L-shaped plate 396 is fixedly connected with an elastic member 397 for elastically squeezing the movable block 391, and the top of the base 1 is fixedly connected with a raised ring 398 for raising the movable block 391 through a bracket;

[0072] The elastic member 397 is made of elastic materials in the prior art, such as elastic rubber, spring, metal spring, etc., and is used to squeeze the movable block 391, so that the arc-shaped scraper frame 392 is in close contact with the upper pressing plate 21 and the lower pressing plate 22. With the rotation of the arc-shaped scraper frame 392, the excess slurry of the sample 5 can be scraped off, thereby improving its scraping and cleaning effect;

[0073] The raised ring 398 is provided to limit the movable block 391 so that the movable block 391 is in a reset state, thereby causing the arc-shaped scraper frame 392 in the scraper member 39 to be in a contracted state and lose contact with the lower pressing block 22, thereby facilitating slurry detection.

[0074] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixing fixture for a rotational rheometer, comprising a base (1), a fixture assembly (2) arranged on the base (1), a scraper assembly (3) arranged on the fixture assembly (2), and a lifting frame (4) for driving the fixture assembly (2), characterized in that: The clamp assembly (2) comprises an upper pressing plate (21) and a lower pressing plate (22) mounted on the top of the base (1), and a rotating member for rotating the upper pressing plate (21) is provided on the lifting frame (4); The scraper assembly (3) comprises a scraper end for scraping the sample (5) between the upper pressing plate (21) and the lower pressing plate (22), and the scraper end of the scraper assembly (3) is drivingly connected to the lifting frame (4) that moves up and down or to the rotating end of the rotating member; When the scraper assembly (3) moves in a vertical direction or in a circular direction along the clamp assembly (2), the scraper end of the scraper assembly (3) scrapes off excess slurry from the sample (5).

2. A fixing fixture for a rotational rheometer according to claim 1, characterized in that: The lifting frame (4) comprises a guide rod (41) fixed to the top of the base (1); the outer surface of the guide rod (41) is sleeved with a lifting frame (42) and a connecting plate (43) in sequence from top to bottom; a spring group (44) is fixedly connected between the lifting frame (42) and the connecting plate (43); and one side of the connecting plate (43) is rotatably connected to a rotating shaft at the top of the upper pressure plate (21).

3. A fixing fixture for a rotational rheometer according to claim 2, characterized in that: The outer surface of the lower pressure plate (21) is sleeved with a ring-shaped concave material receiving groove (31), and the scraper assembly (3) includes a U-shaped frame (32) fixed to the top of the base (1), the top of the U-shaped frame (32) is rotatably connected to an inclined L-shaped frame (33) via a rotating shaft, and one end of the L-shaped frame (33) is hinged to a hinge seat (34), and the hinge seat (34) is slidably connected to the bottom of the concave material receiving groove (31); The lifting frame (42) is provided with a driving member for causing the L-shaped frame (33) to move in a fan shape with the rotation axis as the center; The scraper components (3) are in two groups and are arranged symmetrically, and the angle of the L-shaped frame (33) is greater than ninety degrees.

4. A fixing fixture for a rotational rheometer according to claim 3, characterized in that: The driving member comprises a pressing plate (35) fixed to the bottom of the lifting frame (42) through a bracket and a roller (36) rotatably connected to the top of the L-shaped frame (33), and a torsion spring is provided at the rotating end of the L-shaped frame (33); The outer surface of the guide rod (41) is provided with a limiting plate (45) for limiting the connection plate (43) moving downward, and the height of the limiting plate (45) is adjustable.

5. A fixing fixture for a rotational rheometer according to claim 1, characterized in that: The scraper assembly (3) comprises an annular toothed disc (38) rotatably connected to the top of the base (1), and a scraper member (39) is arranged on the top of the annular toothed disc (38), and the top of the base (1) is rotatably connected to a driving gear (37) meshing with the outer surface of the annular toothed disc (38) via a rotating shaft, and the axis of the driving gear (37) is fixedly connected to a telescopic rod (46), and the top end of the telescopic rod (46) is connected to the jacking frame (4), and the telescopic rod (46) is transmission-connected to the rotating end of the rotating member.

6. A fixing fixture for a rotational rheometer according to claim 5, characterized in that: The rotating member comprises a motor (6) fixed on the lifting frame (4); the output shaft of the motor (6) is connected to two belt sets (7) via two one-way bearings, and the motor (6) is respectively connected to the rotating shafts of the telescopic rod (46) and the upper pressure plate (21) via the two belt sets (7).

7. A fixing fixture for a rotational rheometer according to claim 5, characterized in that: The scraper member (39) comprises a movable block (391) connected to the top of the annular toothed disc (38), and a curved scraper frame (392) is detachably mounted on the top of the movable block (391), and a material storage barrel (393) with an open top is fixedly connected to one side of the curved scraper frame (392), and a cover plate (394) is arranged on the top of the material storage barrel (393), and the bottom of the cover plate (394) is connected to a material receiving barrel (395) via a connecting rod.

8. A fixing fixture for a rotational rheometer according to claim 7, characterized in that: The top of the annular toothed disc (38) is fixedly connected to an L-shaped plate (396), and the bottom of the movable block (391) is slidably connected to the top of the L-shaped plate (396), and the inside of the L-shaped plate (396) is fixedly connected to an elastic member (397) for elastically squeezing the movable block (391), and the top of the base (1) is fixedly connected to a raised ring (398) for raising the movable block (391) through a bracket.

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