Viscosity tester for standard detection of edible oil

Abstract

The invention discloses a viscosity tester for standard detection of edible oil, and relates to the technical field of standard detection of edible oil, the viscosity tester comprises a sealing cover and a feeding linkage assembly, the side end of the sealing cover is fixedly provided with a mounting plate, and the middle part of the mounting plate is provided with the feeding linkage assembly. On one hand, the recovery rope is pulled in the middle of the small metal ball, the small metal ball can be forcibly restrained to move along the axis under the traction effect of the recovery rope, track deviation of the small ball caused by manual throwing deviation is avoided, and therefore the approximate condition that liquid is extended infinitely in the Stokes law is met; compared with viscosity measurement value deviation caused by the fact that the small ball touches the pipe wall when no constraint exists, systematic errors can be effectively reduced, measurement precision is guaranteed, on the other hand, a temperature control module of a bimetallic strip and a metal small ball throwing module are linked, the metal small ball can be automatically thrown when the system reaches the set temperature, the linkage performance of all structures of the device is higher, and the device is more convenient to use. And manual operation errors are effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of edible oil standardization detection, in particular to a viscosity measuring instrument for edible oil standardization detection. Background Art

[0002] Currently, among the instruments for measuring liquid viscosity, the falling ball method is the most common method. This method usually involves filling a vertically placed glass measuring cylinder with the liquid to be measured. When a small metal ball falls from the top of the measuring cylinder into the liquid and passes through two specific scale lines in succession, the falling speed of the ball can be calculated based on the time interval when the ball passes through the two specific scale lines and the distance between the two scale lines. Then, based on the measured parameters such as the diameter of the ball and the measuring cylinder, the density of the ball and the liquid, the corresponding physical calculation formula can be used to calculate the viscosity of the liquid.

[0003] However, traditional technology has many shortcomings when using the falling ball method to measure liquid viscosity. First, there is a lot of manual intervention. The placement of the ball depends on manual operation, which can easily cause the trajectory of the ball to deviate due to initial placement deviation, and the ball then touches the tube wall, resulting in deviation in the viscosity measurement value. Secondly, when multiple tests are required and the average value is taken, the traditional method usually uses tweezers or disposable chopsticks to pick up the ball that sinks to the bottom of the container. The experiment needs to be paused and the container opened, which may not only disturb the flatness of the liquid surface, but also frequently opening and closing the container can easily lead to liquid contamination or temperature imbalance. The operation is cumbersome and can easily affect the experimental results. Summary of the Invention

[0004] The object of the present invention is to provide a viscosity measuring instrument for standardized testing of edible oils to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A viscosity meter for standardized testing of edible oils comprises a sealing cover and a delivery linkage assembly, wherein a mounting plate is fixedly mounted on the side end of the sealing cover, a delivery linkage assembly is provided in the middle of the mounting plate, the delivery linkage assembly comprises a transmission shaft rotatably mounted on the middle of the mounting plate, an external magnet is coaxially fixed to one end of the transmission shaft, a ratchet is coaxially fixed to the middle of the transmission shaft, and a wire drum is coaxially fixed to the other end of the transmission shaft, a non-return pawl is provided on the side end of the ratchet, and the non-return pawl is rotatably mounted on the side end of the mounting plate through a pin shaft, and the non-return pawl is engaged with the tooth groove on the outer edge of the ratchet, a spring is connected to the side end of the non-return pawl, and the end of the spring facing away from the non-return pawl is elastically matched with a boss, and the boss protrudes and is fixed to the side end of the mounting plate, a hanging ring is integrally fixed to the bottom end of the non-return pawl, and the hanging ring is externally connected to a traction rope.

[0006] Furthermore, a motor is fixedly mounted on the back of the mounting plate, and a controller is connected to the side end of the motor. An inner magnet is fixedly connected to the rotating end of the motor, and the alternating magnetic poles of the inner magnet and the outer magnet interact to generate continuous torque transmission.

[0007] Furthermore, an ear plate extends from the side end of the mounting plate, and a guide wheel is rotatably mounted on the end of the ear plate, and the guide wheel is located above the center hole of the sealing cover.

[0008] Furthermore, a limiting assembly is provided below the middle hole of the sealing cover, and the limiting assembly includes an insulating ball holder fixedly installed below the middle hole of the sealing cover, a limiting recess is provided at the bottom of the insulating ball holder, and conductive copper sheets are provided on both sides of the limiting recess, and the top ends of the conductive copper sheets on both sides are connected to cable 1, and cable 1 is electrically connected to the controller at the side end of the motor.

[0009] Furthermore, the limiting assembly also includes a small metal ball fitted inside the limiting recess, the metal ball is fixedly connected with a recovery rope along the axial movement direction, and the recovery rope passes axially through the inside of the hole in the insulating ball holder, and the recovery rope is wound on the wire drum.

[0010] Furthermore, the sealing cover is buckled onto the glass measuring cylinder, and a bimetallic strip is fixed to the outer side of the glass measuring cylinder by bolts.

[0011] Furthermore, the bimetallic strip is made of a copper-steel composite material, and the bending temperature point of the bimetallic strip is calibrated to the set temperature of the water bath. The free end of the bimetallic strip is hinged to the end of the traction rope, and the deformation of the free end of the bimetallic strip causes the check pawl to disengage from the outer edge tooth groove of the ratchet by pulling the traction rope.

[0012] Furthermore, a variable distance measuring assembly is fixed on the outside of the glass measuring cylinder, and the variable distance measuring assembly includes a flange axially fixed to the outside of the glass measuring cylinder, magnetic strips are fixed by bolts on both sides of the end of the flange, and a movable clip is installed on the outside of the flange for sliding along the Z-axis direction, and the inner recess of the movable clip is magnetically fixed to the magnetic strip.

[0013] Furthermore, the variable distance measurement component also includes a photoelectric sensor clamped on the side end of the movable buckle, the photoelectric sensor is externally connected to cable 2, and the end of cable 2 is electrically connected to the measuring instrument host.

[0014] Furthermore, the glass measuring cylinder is embedded in the water bath jacket, and a constant temperature heating coil is provided at the bottom end of the water bath jacket. Beneficial effects

[0015] 1. By pulling a recovery rope through the middle of the metal ball, the metal ball can be constrained to move along the axis under the action of the recovery rope, avoiding the deviation of the ball's trajectory due to manual delivery deviation, thereby satisfying the "infinitely extended liquid" approximation condition in Stokes' law. Compared with the viscosity measurement deviation caused by the ball touching the tube wall when there is no constraint, it can effectively reduce systematic errors and ensure measurement accuracy. On the other hand, by linking the temperature control module of the bimetallic strip with the metal ball delivery module, the metal ball can be automatically delivered when the system reaches the set temperature. The linkage between the various structures of the device is stronger, effectively reducing manual operation errors.

[0016] 2. By retaining a certain air gap between the inner magnet and the outer magnet, a device for non-contact power transmission is realized based on the principle of magnetic coupling, so that the existence of the power device will not interfere with the operation of the delivery linkage component. In addition, when the metal ball is recovered to the preset height and contacts the conductive copper sheets on both sides of the limit notch, the cables on both sides are connected and transmit signals to the controller on the motor side, causing the motor to automatically stop and stop rewinding. At this time, if the temperature is appropriate, the metal ball will continue to be delivered for viscosity measurement and the average value will be taken. If the temperature is too low, the delivery will be suspended due to the locking effect of the check pawl on the ratchet until the temperature returns to the expected value and the metal ball will be delivered again. The automatic delivery and stop of the metal ball are controlled according to the fluctuation of the experimental variables, effectively improving the measurement accuracy and the degree of automation of the equipment.

[0017] 3. The two photoelectric sensors are magnetically fixed between the inner notch of the movable buckle and the magnetic strips at both ends of the flange. When the installation height is adjusted to the appropriate level, just release the hand to automatically fix the installation position of the two photoelectric sensors. Since no bolts are required, the installation height and spacing of the two photoelectric sensors can be adjusted very conveniently, which improves the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the overall structure of the device of the present invention; Figure 2 It is a schematic cross-sectional structural diagram of the device of the present invention; Figure 3 This is a schematic structural diagram of the variable distance measurement component of the present invention; Figure 4 This is a schematic structural diagram of the sealing cover of the present invention; Figure 5 This is a schematic diagram of the structure of the limit assembly of the present invention; Figure 6 This is a schematic diagram of the mounting plate structure of the present invention; Figure 7 This is a schematic diagram of the structure of the linkage component of the present invention.

[0019] Figure: 1, sealing cover; 2, mounting plate; 3, motor; 4, controller; 5, inner magnet; 6, ear plate; 7, guide wheel; 8, delivery linkage assembly; 801, transmission shaft; 802, outer magnet; 803, ratchet; 804, wire drum; 805, check pawl; 806, spring; 807, boss; 808, hanging ring; 809, traction rope; 9, limit assembly; 901, insulating ball holder; 902 , limit notch; 903, conductive copper sheet; 904, cable one; 905, metal ball; 906, recovery rope; 10, glass measuring cylinder; 11, bimetallic strip; 12, variable distance measurement component; 1201, flange; 1202, magnetic strip; 1203, movable buckle; 1204, photoelectric sensor; 1205, cable two; 1206, measuring instrument host; 13, water bath jacket; 14, constant temperature heating coil. DETAILED DESCRIPTION

[0020] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0021] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0023] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0024] See also Figures 1 to 7 The present invention provides a viscosity measuring instrument for standardized testing of edible oil, comprising a sealing cover 1 and a delivery linkage assembly 8, wherein a mounting plate 2 is fixedly mounted on a side end of the sealing cover 1, and a delivery linkage assembly 8 is provided in the middle of the mounting plate 2; The delivery linkage assembly 8 includes a transmission shaft 801 rotatably mounted in the middle of the mounting plate 2, an external magnet 802 is coaxially fixed to one end of the transmission shaft 801, a ratchet 803 is coaxially fixed to the middle of the transmission shaft 801, and a wire drum 804 is coaxially fixed to the other end of the transmission shaft 801, a non-return pawl 805 is provided at the side end of the ratchet 803, and the non-return pawl 805 is rotatably mounted on the side end of the mounting plate 2 through a pin shaft, and the non-return pawl 805 is engaged with the outer edge tooth groove of the ratchet 803, and a spring 806 is connected to the side end of the non-return pawl 805, and the spring 806 is elastically connected to the boss 807 at one end away from the non-return pawl 805. The bottom end of the non-return pawl 805 is integrally fixed with a hanging ring 808, and the hanging ring 808 is externally connected to a traction rope 809. The sealing cover 1 is buckled on the glass measuring cylinder 10, and the outer side of the glass measuring cylinder 10 is fixed with a bimetallic strip 11 by bolts. The bimetallic strip 11 is made of a copper-steel composite material, and the bending temperature point of the bimetallic strip 11 is calibrated to the set temperature of the water bath. The free end of the bimetallic strip 11 is hinged to the end of the traction rope 809, and the deformation of the free end of the bimetallic strip 11 causes the non-return pawl 805 to disengage from the outer edge tooth groove of the ratchet 803 by pulling the traction rope 809.

[0025] The specific operation is as follows: the edible oil to be tested is filled in the vertically placed glass measuring cylinder 10, and the water bath jacket 13 outside the glass measuring cylinder 10 is filled with water. The constant temperature heating coil 14 is activated and the edible oil is heated by the heat conduction of the water. The present application calibrates the bending temperature point of the bimetallic strip 11 to the set temperature of the water bath. In this way, when the set temperature is reached, the deformation of the free end of the bimetallic strip 11 causes the non-return pawl 805 to disengage from the outer edge groove of the ratchet 803 by pulling the traction rope 809, and the ratchet 803 loses the restraint of the non-return pawl 805 on the metal ball. The metal ball 905 is pulled down and the recovery rope 906 wound on the reel 804 is unwound, causing the metal ball 905 to fall along the axis of the glass measuring cylinder 10. The falling speed of the metal ball 905 can be calculated based on the time interval when the metal ball 905 passes the photoelectric sensor 1204 at two specific scale lines and the distance between the two scale lines. Then, based on the measured parameters such as the diameter of the metal ball 905 and the glass measuring cylinder 10, and the density of the metal ball 905 and the edible oil to be tested, the viscosity of the edible oil to be tested can be calculated using the corresponding physical calculation formula. It should be noted that, on the one hand, the present application pulls a recovery rope 906 in the middle of the metal ball 905, so that the metal ball 905 can be forced to move along the axis under the traction of the recovery rope 906, avoiding the trajectory deviation of the ball due to manual delivery deviation, thereby satisfying the "infinitely extended liquid" approximation condition in Stokes' law. Compared with the viscosity measurement value deviation caused by the ball touching the tube wall when there is no constraint, it can effectively reduce the systematic error and ensure the measurement accuracy. On the other hand, by linking the temperature control module of the bimetallic strip 11 with the delivery module of the metal ball 905, the metal ball 905 can be automatically delivered when the system reaches the set temperature. The linkage between the various structures between the devices is stronger, which effectively reduces the manual operation error.

[0026] See also Figures 4 and 5 A motor 3 is fixedly mounted on the back of the mounting plate 2, and a controller 4 is connected to the side end of the motor 3. An inner magnet 5 is fixedly connected to the rotating end of the motor 3, and the alternating magnetic poles of the inner magnet 5 and the outer magnet 802 interact to generate continuous torque transmission. An ear plate 6 extends from the side end of the mounting plate 2, and a guide wheel 7 is rotatably mounted on the end of the ear plate 6. The guide wheel 7 is located above the middle hole of the sealing cover 1, and a limit assembly 9 is provided below the middle hole of the sealing cover 1. The limiting component 9 includes an insulating ball holder 901 fixedly installed below the hole in the sealing cover 1, a limiting recess 902 is provided at the bottom of the insulating ball holder 901, and conductive copper sheets 903 are provided on both sides of the limiting recess 902, and the tops of the conductive copper sheets 903 on both sides are connected to cable 1 904, and cable 1 904 is electrically connected to the controller 4 at the side end of the motor 3, the limiting component 9 also includes a metal ball 905 fitted inside the limiting recess 902, the metal ball 905 is fixedly connected to a recovery rope 906 along the axial movement direction, and the recovery rope 906 passes axially through the inside of the hole in the insulating ball holder 901, and the recovery rope 906 is wound on the wire drum 804.

[0027] When multiple detections are required and then an average value is taken, the motor 3 is activated and drives the inner magnet 5 fixed to the rotating end to rotate. The alternating magnetic poles of the inner magnet 5 and the outer magnet 802 interact to generate continuous torque transmission, and then the transmission shaft 801 drives the wire drum 804 to rotate in the opposite direction to realize the automatic winding of the recovery rope 906, and the metal ball 905 sunk to the bottom of the cooking oil is automatically lifted and recovered. The present application retains a certain air gap between the inner magnet 5 and the outer magnet 802, and realizes a non-contact power transmission device based on the principle of magnetic coupling, so that the existence of the power device does not interfere with the operation of the delivery linkage assembly 8; In addition, when the metal ball 905 is recovered to a preset height and contacts the conductive copper sheets 903 on both sides of the limit notch 902, the cables 904 on both sides are connected and transmit signals to the controller 4 on the side end of the motor 3, causing the motor 3 to automatically stop and stop winding. At this time, if the temperature is appropriate, the metal ball 905 will continue to be added for viscosity measurement and the average value will be taken. If the temperature is too low, the addition will be suspended due to the locking effect of the check pawl 805 on the ratchet 803 until the temperature returns to the expected value and the metal ball 905 is added again. The automatic addition and stop of the metal ball 905 is controlled according to the fluctuation of the experimental variables, effectively improving the measurement accuracy and the degree of automation of the equipment.

[0028] See also Figures 1 to 3 A variable distance measuring assembly 12 is fixed on the outside of the glass measuring cylinder 10 .

[0029] The variable distance measuring assembly 12 includes a flange 1201 axially fixed to the outside of the glass measuring cylinder 10, and magnetic strips 1202 are fixed by bolts on both sides of the end of the flange 1201, and a movable buckle 1203 is installed on the outside of the flange 1201 for sliding along the Z-axis direction, and the inner recess of the movable buckle 1203 is magnetically fixed to the magnetic strip 1202. The variable distance measuring assembly 12 also includes a photoelectric sensor 1204 clamped on the side end of the movable buckle 1203, and the photoelectric sensor 1204 is externally connected to a cable 2 1205, and the end of the cable 2 1205 is electrically connected to the measuring instrument host 1206. The glass measuring cylinder 10 is embedded in the water bath jacket 13, and a constant temperature heating coil 14 is provided at the bottom end of the water bath jacket 13.

[0030] According to the experimental requirements, the installation height of the two photoelectric sensors 1204 is set to the corresponding scale line position on the side of the glass measuring cylinder 10, and then the movable clip 1203 is slid along the Z-axis direction of the flange 1201. In this application, the inner recess of the movable clip 1203 is magnetically fixed to the magnetic strips 1202 at both ends of the flange 1201. When the installation height is adjusted to the appropriate installation height, you only need to let go to automatically fix the installation position of the two photoelectric sensors 1204. Since no bolts are required to fix it, the installation height and spacing of the two photoelectric sensors 1204 can be adjusted particularly conveniently, thereby improving the convenience of operation.

[0031] In summary, when using the viscosity meter for standardized testing of edible oils: First, the installation height of the two photoelectric sensors 1204 is set to the corresponding scale line position on the side of the glass measuring cylinder 10 according to the experimental requirements. Then, the movable clip 1203 is slid along the Z-axis direction of the flange 1201. In this application, the inner recess of the movable clip 1203 is magnetically fixed to the magnetic strips 1202 at both ends of the flange 1201. When the installation height is adjusted to the appropriate level, the installation position of the two photoelectric sensors 1204 can be automatically fixed by simply releasing the clip. Since no bolts are required, the installation height and spacing of the two photoelectric sensors 1204 can be adjusted very conveniently, thereby improving the convenience of operation. Secondly, the edible oil to be tested is filled into the vertically placed glass measuring cylinder 10, and the water bath jacket 13 outside the glass measuring cylinder 10 is filled with water. The constant temperature heating coil 14 is activated and the edible oil is heated by the heat conduction of the water. In this application, the bending temperature point of the bimetallic strip 11 is calibrated to the set temperature of the water bath. In this way, when the set temperature is reached, the deformation of the free end of the bimetallic strip 11 causes the non-return pawl 805 to disengage from the outer tooth groove of the ratchet 803 by pulling the traction rope 809. The ratchet 803 loses the restraint of the non-return pawl 805 and releases the recovery rope 906 wound on the reel 804 under the traction of the metal ball 905, causing the metal ball 905 to fall along the axis of the glass measuring cylinder 10. The falling speed of the metal ball 905 can be calculated based on the time interval when the metal ball 905 passes through the photoelectric sensor 1204 at the two specific scale lines and the distance between the two scale lines. The viscosity of the edible oil to be tested can be calculated by using parameters such as the diameter of the metal ball 905 and the glass measuring cylinder 10, and the density of the metal ball 905 and the edible oil to be tested, using corresponding physical calculation formulas. On the one hand, the present application pulls a recovery rope 906 in the middle of the metal ball 905, so that the metal ball 905 can be forced to move along the axis under the traction of the recovery rope 906, avoiding the deviation of the ball's trajectory due to manual delivery deviation, thereby satisfying the "infinitely extended liquid" approximation condition in Stokes' law. Compared with the viscosity measurement value deviation caused by the ball touching the tube wall when there is no constraint, the systematic error can be effectively reduced to ensure measurement accuracy. On the other hand, by linking the temperature control module of the bimetallic strip 11 with the delivery module of the metal ball 905, the metal ball 905 can be automatically delivered when the system reaches the set temperature. The linkage between the various structures of the device is stronger, effectively reducing manual operation errors. Finally, when multiple tests are required and the average value is taken, the motor 3 is activated and drives the inner magnet 5 connected to the rotating end to rotate. The alternating magnetic poles of the inner magnet 5 and the outer magnet 802 interact to generate continuous torque transmission, and then the transmission shaft 801 drives the wire drum 804 to rotate in the opposite direction to realize the automatic winding of the recovery rope 906, and automatically lifts and recovers the metal ball 905 that sinks to the bottom of the edible oil. The present application retains a certain air gap between the inner magnet 5 and the outer magnet 802, and realizes a non-contact power transmission device based on the principle of magnetic coupling, so that the existence of the power device will not interfere with the operation of the delivery linkage component 8. In addition, when the metal ball When 905 is recovered to a preset height and contacts the conductive copper sheets 903 on both sides of the limit notch 902, the cables 904 on both sides are connected and transmit signals to the controller 4 on the side end of the motor 3, causing the motor 3 to automatically stop and stop winding. At this time, if the temperature is appropriate, the metal balls 905 are continued to be added for viscosity measurement and the average value is taken. If the temperature is too low, the addition is suspended under the locking effect of the check pawl 805 on the ratchet 803 until the temperature returns to the expected value and the metal balls 905 are added again. The automatic addition and stop of the metal balls 905 are controlled according to the fluctuation of the experimental variables, effectively improving the measurement accuracy and the degree of automation of the equipment.

[0032] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0033] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method of the present invention and its core ideas. The above are only preferred implementation methods of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of the present invention.

Claims

1. A viscosity measuring instrument for standardized testing of edible oils, characterized in that: It includes a sealing cover and a delivery linkage assembly, a mounting plate is fixedly installed on the side end of the sealing cover, a delivery linkage assembly is provided in the middle of the mounting plate, the delivery linkage assembly includes a transmission shaft rotatably installed in the middle of the mounting plate, an external magnet is coaxially fixed to one end of the transmission shaft, a ratchet is coaxially fixed to the middle of the transmission shaft, and a wire drum is coaxially fixed to the other end of the transmission shaft, a non-return pawl is provided on the side end of the ratchet, and the non-return pawl is rotatably installed on the side end of the mounting plate through a pin shaft, and the non-return pawl is engaged with the tooth groove on the outer edge of the ratchet, a spring is connected to the side end of the non-return pawl, and the spring is elastically matched with the boss at one end away from the non-return pawl, and the boss protrudes and is fixed to the side end of the mounting plate, and the bottom end of the non-return pawl is integrally fixed with a hanging ring, and the hanging ring is externally connected to a traction rope.

2. The viscosity measuring instrument for standardized testing of edible oil according to claim 1, characterized in that: A motor is fixedly mounted on the back of the mounting plate, and a controller is connected to the side end of the motor. An inner magnet is fixedly connected to the rotating end of the motor, and the alternating magnetic poles of the inner magnet and the outer magnet interact to generate continuous torque transmission.

3. The viscosity measuring instrument for standardized detection of edible oil according to claim 2, characterized in that: An ear plate is extended from the side end of the mounting plate, and a guide wheel is rotatably mounted on the end of the ear plate, and the guide wheel is located above the middle hole of the sealing cover.

4. The viscosity measuring instrument for standardized detection of edible oil according to claim 3, characterized in that: A limiting assembly is provided below the middle hole of the sealing cover, and the limiting assembly includes an insulating ball holder fixedly installed below the middle hole of the sealing cover. A limiting recess is provided at the bottom of the insulating ball holder, and conductive copper sheets are provided on both sides of the limiting recess. The top ends of the conductive copper sheets on both sides are connected to cable 1, and cable 1 is electrically connected to the controller at the side end of the motor.

5. The viscosity measuring instrument for standardized testing of edible oil according to claim 4, characterized in that: The limiting assembly also includes a small metal ball fitted inside the limiting recess, the small metal ball is fixedly connected with a recovery rope along the axial movement direction, and the recovery rope passes axially through the inside of the hole in the insulating ball holder, and the recovery rope is wound on the wire drum.

6. The viscosity measuring instrument for standardized testing of edible oil according to claim 5, characterized in that: The sealing cover is buckled on the glass measuring cylinder, and a bimetallic sheet is fixed on the outer side of the glass measuring cylinder by bolts.

7. The viscosity measuring instrument for standardized testing of edible oils according to claim 6, characterized in that: The bimetallic strip is made of a copper-steel composite material, and the bending temperature point of the bimetallic strip is calibrated to the set temperature of the water bath. The free end of the bimetallic strip is hinged to the end of the traction rope, and the deformation of the free end of the bimetallic strip causes the non-return pawl to disengage from the outer edge tooth groove of the ratchet by pulling the traction rope.

8. The viscosity measuring instrument for standardized testing of edible oils according to claim 7, characterized in that: A variable distance measuring assembly is fixed on the outside of the glass measuring cylinder. The variable distance measuring assembly includes a flange axially fixed to the outside of the glass measuring cylinder. Magnetic strips are fixed by bolts on both sides of the end of the flange, and a movable buckle is installed on the outside of the flange for sliding along the Z-axis direction, and the inner notch of the movable buckle is magnetically fixed to the magnetic strip.

9. The viscosity measuring instrument for standardized testing of edible oils according to claim 8, characterized in that: The variable distance measurement component also includes a photoelectric sensor that is clamped on the side end of the movable buckle. The photoelectric sensor is externally connected to a second cable, and the end of the second cable is electrically connected to the measuring instrument host.

10. A viscosity measuring instrument for standardized testing of edible oils according to claim 9, characterized in that: The glass measuring cylinder is embedded in the water bath jacket, and a constant temperature heating coil is provided at the bottom end of the water bath jacket.

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