Clamp jacket of rotational rheometer

Abstract

The utility model discloses a clamp jacket of a rotational rheometer, which comprises an instrument rack, a lower mounting seat arranged on the instrument rack through a rotating shaft, a lower clamp fixedly arranged on the lower mounting seat, a lower parallel plate arranged in the middle of the top end of the lower clamp, a lower jacket sleeved outside the lower clamp, and a servo motor arranged above the instrument rack, an electric telescopic rod is fixedly arranged at the output end of the servo motor, an upper mounting base is arranged at the output end of the electric telescopic rod, an upper clamp is arranged at the bottom end of the upper mounting base, and an upper parallel plate matched with the lower parallel plate is arranged in the middle of the bottom end of the upper clamp; the rotary rheometer clamp jacket can be quickly and conveniently replaced and maintained, gaps existing when the rotary rheometer clamp jacket is used can be reduced, the sealing performance of the rotary rheometer clamp jacket is improved, and the situation that melt leaks or flows out when the rotary rheometer clamp jacket is at a high shearing rate is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of clamp sleeve, specifically relates to a clamp sleeve of rotary rheometer. BACKGROUND

[0002] The rotary rheometer can be used for measuring the rheological property of polymer materials, petrochemical products, paints and adhesives and the like, and the test mode has diversity and can satisfy different test requirements, such as steady state mode (steady state shear rate scanning, stress scanning and the like), transient mode (stress relaxation, creep, step shear and the like) and dynamic mode (amplitude frequency scanning, amplitude time scanning, amplitude stress scanning and the like), and the rotary rheometer can usually be used to represent the yield strength of polymer melt, the change relation of viscosity with the increase of shear rate or stress, and guide the process parameter setting or formula modification in the molding process.

[0003] In the prior art, when using a parallel plate clamp to carry out rheological measurement, if the shear rate is higher than 100 s -1 , the melt is easily thrown out by inertia, thereby affecting the accuracy and stability of the test.

[0004] In view of the problems in the prior art, no effective solution has been proposed so far. CONTENT OF THE UTILITY MODEL

[0005] In view of the problems in the prior art, the utility model provides a clamp sleeve of rotary rheometer to overcome the above technical problems existing in the prior art.

[0006] Therefore, the utility model adopts the specific technical scheme as follows:

[0007] A clamp sleeve of rotary rheometer, comprising an instrument rack, a lower mounting seat is arranged on the instrument rack through a rotating shaft, a lower clamp is fixedly arranged on the lower mounting seat, a lower parallel plate is arranged at the top end of the lower clamp, a lower sleeve is arranged outside the lower clamp, a servo motor is arranged above the instrument rack, an electric telescopic rod is fixedly arranged at the output end of the servo motor, an upper mounting seat is arranged at the output end of the electric telescopic rod, an upper clamp is arranged at the bottom end of the upper mounting seat, an upper parallel plate matched with the lower parallel plate is arranged at the middle part of the bottom end of the upper clamp, and an upper sleeve is arranged outside the upper clamp.

[0008] Further, in order to facilitate the protection of servo motor, while not affecting the subsequent measurement, the instrument frame is sleeved with a mounting cover matched with the servo motor, and the electric telescopic rod is connected with the mounting cover through a bearing.

[0009] Further, in order to facilitate the heating operation according to different samples, the actual application environment can be simulated, and the behavior of the sample at a specific temperature can be more accurately understood, the upper clamp sleeve and the lower clamp sleeve are provided with a heating sleeve, and the upper clamp sleeve and the lower clamp sleeve are provided with a heat preservation cavity, and the heat preservation cavity is provided with heat preservation cotton.

[0010] Further, in order to reduce the gap existing in the use of the rotary rheometer clamp sleeve, improve the sealing performance of the rotary rheometer clamp sleeve, the bottom end of the upper clamp sleeve is provided with a sealing block equidistant from the center, the top end of the lower clamp sleeve is provided with a sealing groove matched with the sealing block, and the sealing groove is provided with a sealing pad.

[0011] Further, in order to ensure the stability of the device when placed and used, the bottom end of the instrument frame is provided with a support seat, and the bottom end of the support seat is provided with an anti-skid pad.

[0012] Further, in order to facilitate the assembly and disassembly of the upper clamp sleeve, and facilitate cleaning or replacement operation, the upper clamp sleeve is assembled by two arc sleeves, and the two side walls of one of the arc sleeves are symmetrically provided with auxiliary blocks, the middle part of the auxiliary block is provided with a positioning hole, the other arc sleeve is provided with an auxiliary groove matched with the auxiliary block, the outer side wall of the auxiliary groove is provided with a limiting screw through thread engagement, and the limiting screw is engaged with the positioning hole; the top end and the bottom end of the auxiliary block are provided with auxiliary holes, the auxiliary holes are provided with spring telescopic rods, and the output ends of the spring telescopic rods are provided with limiting blocks, the limiting blocks slide out of the auxiliary holes, and the limiting blocks are in contact with the inner wall of the auxiliary groove.

[0013] Further, in order to facilitate the assembly and disassembly of the lower clamp sleeve, and facilitate cleaning or replacement operation, the lower clamp sleeve is also assembled by two arc sleeves, and the structure between the two arc sleeves of the lower clamp sleeve is the same as that between the two arc sleeves of the upper clamp sleeve.

[0014] The utility model discloses the following beneficial effects:

[0015] (1), through the mutual cooperation between the auxiliary block of upper clamp sleeve and lower clamp sleeve, spring telescopic rod and limiting block, the rotary rheometer clamp sleeve can be quickly and conveniently replaced and maintained, the trouble of disassembly and installation is reduced, the sealing block and the sealing pad are matched with each other, the gap existing in the use of the rotary rheometer clamp sleeve is reduced, the sealing performance of the rotary rheometer clamp sleeve is improved, and the leakage or outflow of the melt of the rotary rheometer clamp sleeve under high shear rate is reduced.

[0016] (2), through the installation seat set in the instrument frame and the upper clamp, the lower clamp between each other, facilitate to the clamp of the rotary rheometer installation fixed, improve the stability of the rotary rheometer clamp use, through the cooperation of the heating jacket and the heat preservation cotton, can according to the sample condition characteristics heating, can simulate the environmental conditions in the actual application, more accurately understand the behavior of the sample at a certain temperature. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 is a structure diagram of a clamp sleeve of a rotary rheometer according to an embodiment of the present application;

[0019] Figure 2 is a cross-sectional structure diagram of an upper clamp and a lower clamp of a clamp sleeve of a rotary rheometer according to an embodiment of the present application;

[0020] Figure 3 is a cross-sectional structure diagram of an installation cover of a clamp sleeve of a rotary rheometer according to an embodiment of the present application;

[0021] Figure 4 is a structure diagram of an upper sleeve and a lower sleeve of a clamp sleeve of a rotary rheometer according to an embodiment of the present application Figure 1 ;

[0022] Figure 5 is a structure diagram of an upper sleeve and a lower sleeve of a clamp sleeve of a rotary rheometer according to an embodiment of the present application Figure 2 ;

[0023] Figure 6 is a structure diagram of a spring sleeve telescopic rod of a clamp sleeve of a rotary rheometer according to an embodiment of the present application;

[0024] Figure 7 is a structure diagram of a heat preservation cotton of a clamp sleeve of a rotary rheometer according to an embodiment of the present application.

[0025] In the drawings:

[0026] 1, instrument frame; 2, mounting cover; 3, servo motor; 4, electric telescopic rod; 5, lower mounting seat; 6, upper clamp; 7, lower clamp; 8, lower parallel plate; 9, heating sleeve; 10, upper clamp sleeve; 11, auxiliary block; 12, lower clamp sleeve; 13, auxiliary hole; 14, spring sleeve telescopic rod; 15, limiting block; 16, limiting screw; 17, sealing block; 18, sealing pad; 19, thermal insulation cotton; 20, non-slip pad; 21, upper mounting seat; 22, upper parallel plate. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0028] According to the embodiments of the utility model, a clamp sleeve of a rotary rheometer is provided.

[0029] Embodiment one;

[0030] As Figures 1-7 shown, a clamp sleeve of a rotary rheometer is provided, including instrument frame 1, the bottom end four corners of which are vertically welded with support seat, and the bottom end of the support seat is bonded with non-slip pad 20, which can ensure stability during use, and the upper part of the instrument frame 1 is provided with servo motor 3, the output end of which is fixedly installed with electric telescopic rod 4 through shaft coupling, the output end of the electric telescopic rod 4 is installed with upper mounting seat 21, the bottom end of the upper mounting seat 21 is provided with upper clamp 6, the bottom end of the upper clamp 6 is screw-installed with upper parallel plate 22 in the middle part, and the instrument frame 1 (located directly below the upper clamp 6) is rotationally provided with lower mounting seat 5 through a rotating shaft, the top end of the lower mounting seat 5 is installed with lower clamp 7 matched with the upper clamp 6, and the top end of the lower clamp 7 is screw-installed with lower parallel plate 8 in the middle part, the upper parallel plate 22 and the lower parallel plate 8 cooperate to facilitate clamping of the sample to ensure that the sample receives uniform pressure during the test, wherein the instrument frame 1 is externally sleeved with mounting cover 2 for protecting servo motor 3, and the outer part (non-elongated end) of the electric telescopic rod 4 is connected with the mounting cover 2 through a bearing, without affecting the rotation thereof, and the electric telescopic rod 4 can be powered through an electric slip ring (a more mature technology, which is not described here), and the instrument frame 1 is further provided with optical decoder, torque sensor, normal force sensor, data acquisition and processing system, etc., which can facilitate rheological measurement of the sample.

[0031] As Figures 1-7As shown, in order to facilitate the heating of the sample during the measurement process, while ensuring the heat preservation effect, reducing the heat exchange with the outside world, and facilitating the assembly and disassembly operation of the upper jacket 10 and the lower jacket 12, and quickly and conveniently replacing and maintaining, reducing the trouble of disassembly and installation, the upper jacket 10 and the upper clamp 6 are provided with a heating sleeve 9. The heating sleeve 9 can be heated by electric heating or other heating devices. The temperature environment around the sample can be controlled during testing, the environmental conditions in actual application can be simulated, the behavior of the sample at a specific temperature can be more accurately understood, and the mature technology is not described here. In order to reduce the heat exchange with the outside world, the upper jacket 10 and the lower jacket 12 are internally provided with a heat preservation cavity, which is filled with heat preservation cotton 19 (which can also be other heat preservation materials), so as to reduce the heat exchange with the outside world. In order to reduce the gap existing in the use of the rotary rheometer clamp jacket, improve the sealing performance of the rotary rheometer clamp jacket, and reduce the leakage or outflow of the melt in the rotary rheometer clamp jacket at high shear rate, the bottom end of the upper jacket 10 is provided with a sealing block 17 equidistant from the center, and the top end of the corresponding lower jacket 12 is provided with a sealing groove for facilitating the insertion of the sealing block 17. In order to ensure the sealing effect, the inside of the sealing groove is bonded with a sealing gasket 18.

[0032] In order to facilitate the splicing and disassembly operation of the upper jacket 10 and the lower jacket 12, both of which are spliced by two arc-shaped sleeves, and the structures of the two arc-shaped sleeves are the same, the upper jacket 10 is described in detail. An auxiliary block 11 is bonded on the two side walls of one of the arc-shaped sleeves, and a corresponding auxiliary groove is provided on the side wall of the other arc-shaped sleeve for facilitating the insertion of the auxiliary block 11. A limiting screw 16 is engaged with the outer side wall of the auxiliary groove by threads, and a positioning hole is provided in the middle of the auxiliary block 11 for facilitating the fixation of the limiting screw 16. In order to ensure the firmness of the insertion, the auxiliary block 11 can be preliminarily fixed and positioned and fixed by cooperating with the limiting screw 16. The top end and the bottom end of the auxiliary block 11 are provided with auxiliary holes 13, and a spring-equipped telescopic rod 14 (which can be composed of a telescopic sleeve rod and a spring, and is a mature technology which is not described here, and can be conveniently slid in the vertical direction) is installed inside the auxiliary holes 13. The output end (i.e. the telescopic end) of the spring-equipped telescopic rod 14 is connected with a limiting block 15, and the limiting block 15 slides out of the auxiliary hole 13. The end of the limiting block 15 is bonded with a rubber pad, which can be conveniently contacted with the inside of the auxiliary groove for preliminary positioning and fixing.

[0033] Example two

[0034] And for the upper parallel plate 22 and the lower parallel plate 8, it can be fixedly installed between the upper clamp 6 and the lower clamp 7 through screw or clamping, convenient for installation or disassembly operation, and the upper parallel plate 22 and the lower parallel plate 8 can be combined with cone plate and parallel plate, coaxial cylinder and the like according to the use requirement, to ensure the accuracy and reliability of the result when measuring different samples, and the material can be stainless steel, titanium alloy or quartz, and the size of the clamp can be different specifications, such as for low viscosity and low modulus sample, a large radius clamp should be selected to reduce stress, and for high viscosity and high modulus sample, a small radius clamp should be selected to increase stress, and the selection of the clamp and the like is reasonably selected according to the actual situation, to ensure the accuracy of the measurement structure, which is a mature technology and will not be described here.

[0035] In order to facilitate the understanding of the above technical scheme of the utility model, the working principle or operation mode of the utility model in the actual process will be described in detail.

[0036] As described above, by means of the above technical scheme of the utility model, appropriate upper clamp 6 and lower clamp 7 are selected during use, and then when assembling the upper clamp sleeve 10 and the lower clamp sleeve 12, the limiting block 15 is pressed to make the spring sleeve telescopic rod 14 retract the limiting block 15 into the auxiliary hole 13, and the auxiliary block 11 is inserted into the auxiliary groove, at this time, the spring sleeve telescopic rod 14 is reset under the action of the retraction potential energy, and the limiting block 15 is tightly positioned against the inner wall of the auxiliary groove to complete the preliminary positioning, then the limiting screw 16 is rotated to position and fix the auxiliary block 11 through the positioning hole, at this time, the assembly and fixation of the upper clamp sleeve 10 and the lower clamp sleeve 12 are completed, the sample to be measured is placed on the lower parallel plate 8, the electric telescopic rod 4 is elongated to move the upper parallel plate 22 downward as a whole, the sample can be fixed and supported, at the same time, the sealing block 17 enters the sealing groove, and the sealing gasket 18 can connect and seal the upper clamp sleeve 10 and the lower clamp sleeve 12, which can reduce the gap existing in the use of the rotary rheometer clamp sleeve, improve the sealing performance of the rotary rheometer clamp sleeve, and then the servo motor 3 can work to test, and during the testing process, the heating sleeve 9 can work to heat according to the condition of the sample, and the heat insulation cotton 19 can reduce the heat exchange with the outside, thereby ensuring the heating effect, and when the clamp sleeve needs to be disassembled, the limiting screw 16 is unscrewed to lose the positioning and fixation of the auxiliary block 11, and then the two arc-shaped sleeves are pulled to pull out the auxiliary block 11 from the auxiliary hole 13 to complete the disassembly operation, which can facilitate the cleaning or replacement operation.

[0037] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A clamp jacket for a rotational rheometer, comprising an instrument stand (1), characterized in that The instrument frame (1) is provided with a lower mounting seat (5) on the pivot, the lower mounting seat (5) is fixedly provided with a lower clamp (7), the lower clamp (7) is provided with a lower parallel plate (8) in the middle of the top end, the lower clamp (7) is externally sleeved with a lower clamp sleeve (12), the instrument frame (1) is provided with a servo motor (3) above, the servo motor (3) is fixedly provided with an electric telescopic rod (4) at the output end, the electric telescopic rod (4) is provided with an upper mounting seat (21) at the output end, the upper mounting seat (21) is provided with an upper clamp (6) at the bottom end, the upper clamp (6) is provided with an upper parallel plate (22) in the middle of the bottom end, the upper parallel plate (22) is matched with the lower parallel plate (8), and the upper clamp (6) is externally sleeved with an upper clamp sleeve (10).

2. A fixture jacket for a rotational rheometer according to claim 1, wherein, The instrument frame (1) is externally sleeved with a mounting cover (2) matched with the servo motor (3), and the electric telescopic rod (4) is connected with the mounting cover (2) through a bearing.

3. A fixture jacket for a rotational rheometer according to claim 2, wherein, The upper clamp sleeve (10) and the upper clamp (6) are provided with a heating sleeve (9) therebetween, and the upper clamp sleeve (10) and the lower clamp sleeve (12) are both internally provided with a heat preservation cavity, and the heat preservation cavity is internally provided with heat preservation cotton (19).

4. A fixture jacket for a rotational rheometer as in claim 3, wherein, The upper clamp sleeve (10) is provided with a sealing block (17) at the bottom end, the lower clamp sleeve (12) is provided with a sealing groove matched with the sealing block (17) at the top end, and the sealing groove is internally provided with a sealing gasket (18).

5. A fixture jacket for a rotational rheometer as in claim 4, wherein, The instrument frame (1) is provided with a supporting seat at the bottom end, and the supporting seat is provided with an antiskid pad (20) at the bottom end.

6. A fixture jacket for a rotational rheometer according to claim 5, wherein, The upper clamp sleeve (10) is formed by splicing two arc sleeves, and the two side walls of one of the arc sleeves are symmetrically provided with an auxiliary block (11), the auxiliary block (11) is provided with a positioning hole in the middle, the other arc sleeve is provided with an auxiliary groove matched with the auxiliary block (11) on the two side walls, the auxiliary groove is provided with a limiting screw (16) on the outer side wall through thread engagement, and the limiting screw (16) is engaged with the positioning hole; The auxiliary block (11) is provided with an auxiliary hole (13) at the top end and the bottom end, the auxiliary hole (13) is internally provided with a spring sleeved telescopic rod (14), and the spring sleeved telescopic rod (14) is provided with a limiting block (15) at the output end, the limiting block (15) slides out of the auxiliary hole (13), and the limiting block (15) is in contact with the inner wall of the auxiliary groove.

7. A fixture collet for a rotational rheometer as defined in claim 6, wherein, The lower clamp sleeve (12) is also formed by splicing two arc sleeves, and the structure between the two arc sleeves of the lower clamp sleeve (12) is the same as the structure between the two arc sleeves of the upper clamp sleeve (10).

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