A viscometer for ethylene tar stabilizer detection

Abstract

The present application relates to the field of viscosity detection of ethylene tar, and particularly relates to a viscometer for detecting ethylene tar stabilizer. The viscometer comprises a base, a controller and a transparent constant-temperature bath box, the base is provided with the controller and the transparent constant-temperature bath box, and further comprises a lifting mechanism, a storage rack, a stop plate and a limiting frame, the lifting mechanism is arranged on the top of the transparent constant-temperature bath box, the storage rack is arranged on the lifting mechanism in intervals, the lifting mechanism is used for driving the storage rack to lift, and the stop plate and the limiting frame are arranged on the storage rack. The viscometer can automatically adjust the viscosity tube to a completely vertical state by the cooperation of the electric sliding rail, the storage rack, the stop plate and the limiting frame, manual intervention is not needed, the operation process is simplified, the dependence on the experience of operators is reduced, a non-contact liquid level sensor is used to replace manual observation and timing, the time of fluid passing between specified marks of the viscosity tube can be more accurately recorded, human error is reduced, and the reliability and repeatability of the measurement result are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of viscosity detection of ethylene tar, in particular to a viscometer for detecting ethylene tar stabilizer. BACKGROUND

[0002] In the chemical industry, especially in the process of ethylene production and its byproduct processing, the use of ethylene tar stabilizer is essential. These stabilizers are mainly used to improve the stability of the process and the quality of the product. Among them, accurate detection of the viscosity of ethylene tar stabilizer is one of the important steps to ensure its performance. Traditionally, this detection is usually done through a viscosity tube, which is a simple but effective method for measuring the flowability of a liquid under specific conditions.

[0003] However, there are some obvious limitations in the existing technology. First, when detecting viscosity, it is necessary to manually adjust the viscosity tube to a completely vertical state to ensure that the viscosity tube is in the ideal test position. This operation is not only tedious, but also requires the operator to have certain experience and skills. Second, the traditional timing method relies on manual watch winding to record the time of the fluid passing between the specified marks of the viscosity tube. This method is easily affected by human factors, such as delayed reaction time, distraction, etc., resulting in inaccurate data recording. Such errors can significantly affect the final detection results, reducing the reliability and repeatability of the data, especially in scenarios requiring high-precision measurements. SUMMARY

[0004] Therefore, the present application provides a viscometer for detecting ethylene tar stabilizer, which can solve the problem of the existing technology that requires manual adjustment of the viscosity tube to a completely vertical state to detect the viscosity of ethylene tar stabilizer, which is not only tedious, but also requires the operator to have certain experience and skills, and the traditional timing method is prone to inaccurate data recording, thereby affecting the detection results.

[0005] The technical scheme is: a viscosity meter for ethylene tar stabilizer detection, comprising a base, a controller and a transparent constant temperature bath box, the base is provided with the controller and the transparent constant temperature bath box, further comprising a lifting mechanism, a storage rack, a stop plate, a limiting frame, a fixing mechanism, a support, a non-contact liquid level sensor and an air extraction mechanism, the lifting mechanism is arranged on the top of the transparent constant temperature bath box, the storage rack is arranged on the lifting mechanism in an interval, the lifting mechanism is used for driving the storage rack to lift, the stop plate and the limiting frame are installed on the storage rack, the stop plate and the limiting frame are used for limiting the viscosity tube, the stop plate is used for ensuring that the viscosity tube is in a vertical state, and the limiting frame is used for supporting the viscosity tube, the fixing mechanism is installed on the storage rack and used for fixing the viscosity tube, the support is installed on the stop plate, two non-contact liquid level sensors are arranged on the support and distributed in an up-down mode, the non-contact liquid level sensor is used for detecting the liquid level in the viscosity tube, and the air extraction mechanism is arranged on the lifting mechanism and used for extracting air from the viscosity tube to drive the liquid in the viscosity tube to a proper height.

[0006] Optionally, the lifting mechanism comprises a support column and an electric sliding rail, the support column is installed on the top of the transparent constant temperature bath box, and the electric sliding rail is installed on the outer wall of the support column in an interval.

[0007] Optionally, the fixing mechanism comprises a limiting plate, a handle and a magnetic block, the limiting plate is rotatably installed on the storage rack, the limiting plate is used for fixing the viscosity tube on the stop plate and the limiting frame, the handle is connected to the limiting plate, and the magnetic block is arranged on the storage rack and the limiting plate and used for limiting the limiting plate through magnetic attraction.

[0008] Optionally, the air extraction mechanism comprises a connecting block, a servo motor, a lead screw, a movable plate, an air extraction pump and a positioning pipe, the connecting block is further connected to the sliding block of the electric sliding rail, the servo motor is installed on the connecting block, the output shaft of the servo motor is connected with the lead screw, the movable plate is slidably arranged on the connecting block and threadedly connected with the lead screw, the air extraction pump is installed on the movable plate, and the positioning pipe is installed on the movable plate and in communication with the air inlet of the air extraction pump.

[0009] Optionally, a rubber sleeve is further arranged on the outer wall of the other end of the positioning pipe, and the rubber sleeve is used for sealing between the viscosity tube and the positioning pipe.

[0010] Optionally, a drying box is further arranged on the positioning pipe, and the drying box is used for drying the gas in the positioning pipe.

[0011] Optionally, a cooling mechanism is further arranged, the cooling mechanism comprises a fan, an air outlet frame and an air pipe, the fan is installed on the base, the air outlet frame is installed on the top of the transparent constant temperature bath box, and the air pipe is in communication with the air outlet of the fan and the air outlet frame.

[0012] Optionally, a sealing gasket is further included. The shelf and the limiting plate are both provided with a sealing gasket, and the sealing gasket is used to seal between the shelf and the limiting plate and the transparent constant temperature bath box.

[0013] Beneficial effects: 1. The present invention uses the combination of electric slide rails, racks, back plates and limit frames to ensure that the viscosity tube is automatically adjusted to a completely vertical state without manual intervention, which simplifies the operation process and reduces dependence on operator experience. In addition, the use of non-contact liquid level sensors instead of manual observation timing can more accurately record the time between the fluid passing through the specified marks on the viscosity tube, reducing human errors and improving the reliability and repeatability of the measurement results.

[0014] 2. The present invention provides an air extraction mechanism, which can facilitate the user to extract air from the viscosity tube to adjust the height of the liquid in the viscosity tube to a suitable position, thereby facilitating the user to perform experimental testing.

[0015] 3. The present invention provides a drying box and a cooling mechanism, which not only ensures that the gas in the positioning tube is dry and prevents humid air from affecting the accuracy of the experiment, but also allows the fan to cool the outer surface of the viscosity tube after the experiment to prevent burns to the user when taking it out. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the lifting mechanism of the present invention.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the fixing mechanism of the present invention.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the abutment plate, bracket and non-contact liquid level sensor of the present invention.

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the connecting block, servo motor and lead screw of the present invention.

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the air extraction mechanism of the present invention.

[0022] Figure 7 This is a structural separation diagram of the positioning tube, rubber sleeve and drying box of the present invention.

[0023] Figure 8 It is a schematic diagram of the three-dimensional structure of the cooling mechanism of the present invention.

[0024] Figure 9 It is a schematic diagram of the three-dimensional structure of the storage rack, the limiting plate and the sealing gasket of the present invention.

[0025] The meanings of the reference numerals in the figure are as follows: 1: base, 101: viscosity tube, 2: controller, 3: transparent constant temperature bath, 401: pillar, 402: electric slide rail, 5: shelf, 6: stop plate, 7: limit frame, 801: limit plate, 802: handle, 803: magnet, 9: bracket, 10: non-contact liquid level sensor, 1101: connecting block, 1102: servo motor, 1103: screw rod, 1104: movable plate, 1105: vacuum pump, 1106: positioning tube, 12: rubber sleeve, 13: drying box, 14: fan, 15: air outlet frame, 16: air pipe, 17: sealing pad. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0027] Example: A viscometer for detecting ethylene tar stabilizers, see Figures 1-6 As shown, it includes a base 1, a controller 2 and a transparent constant temperature bath 3; the controller 2 is installed on the left side of the top of the base 1, and the controller 2 has a built-in timing module; the transparent constant temperature bath 3 is installed on the right side of the top of the base 1, and the temperature of the clean water in the transparent constant temperature bath 3 can be controlled at a specified degree. The transparent constant temperature bath 3 is electrically connected to the controller 2;

[0028] Further comprising a lifting mechanism, a storage rack 5, a stop plate 6, a limiting frame 7, a fixing mechanism, a support 9, a non-contact liquid level sensor 10 and a suction mechanism; the lifting mechanism is arranged on the top of the transparent constant temperature bath 3, three storage racks 5 are arranged on the lifting mechanism at intervals, the lifting mechanism is used for driving the storage rack 5 to lift, so that the storage rack 5 is lowered into the clear water in the transparent constant temperature bath 3, and the lower side of the storage rack 5 is located in the interior of the transparent constant temperature bath 3; two stop plates 6 are arranged on the side away from each other of the three storage racks 5, and the two stop plates 6 on the storage rack 5 are distributed in an up-down mode; the limiting frame 7 is installed on the lower side of the three storage racks 5, and the stop plate 6 and the limiting frame 7 are both used for limiting the viscosity tube 101, the stop plate 6 is used for ensuring that the viscosity tube 101 is in a vertical state, and the limiting frame 7 is used for supporting the viscosity tube 101; the fixing mechanism is further installed on the storage rack 5 and used for fixing the viscosity tube 101; the support 9 is installed on the top of the lower stop plate 6; the support 9 is provided with two non-contact liquid level sensors 10, the two non-contact liquid level sensors 10 are distributed in an up-down mode, the height difference of the two non-contact liquid level sensors 10 can be set according to the height difference between the upper light position mark and the lower light position mark of the viscosity tube 101, the non-contact liquid level sensor 10 is used for detecting the liquid level in the viscosity tube 101, and the non-contact liquid level sensor 10 is electrically connected with the controller 2; the suction mechanism is further arranged on the lifting mechanism and used for sucking the viscosity tube 101 to drive the liquid in the viscosity tube 101 to be at a proper height.

[0029] Referring to Figure 2 As shown in the figure, the lifting mechanism comprises a support column 401 and an electric sliding rail 402; the support column 401 is installed in the middle of the top of the transparent constant temperature bath 3; the outer wall of the support column 401 is provided with three electric sliding rails 402 at intervals, the three storage racks 5 are respectively connected with the sliding blocks of the three electric sliding rails 402, and the electric sliding rail 402 is electrically connected with the controller 2.

[0030] Referring to Figure 3 and Figure 4 As shown in the figure, the fixing mechanism comprises a limiting plate 801, a handle 802 and a magnetic block 803; the limiting plate 801 is rotatably installed on the upper side of the storage rack 5, and is used for fixing the viscosity tube 101 on the stop plate 6 and the limiting frame 7; the handle 802 is connected with the top of the limiting plate 801; the magnetic block 803 is arranged on the upper side of the storage rack 5 and the side surface of the limiting plate 801, and the two magnetic blocks 803 on the storage rack 5 and the limiting plate 801 are attracted to each other, so as to limit the limiting plate 801.

[0031] Referring to Figure 5 and Figure 6As shown, the air extraction mechanism includes a connecting block 1101, a servo motor 1102, a lead screw 1103, a movable plate 1104, an air extraction pump 1105 and a positioning pipe 1106; the slider of the electric sliding rail 402 is connected with the connecting block 1101; the servo motor 1102 is installed on the upper side of the connecting block 1101 and electrically connected with the controller 2; the output shaft of the servo motor 1102 is connected with the lead screw 1103; the movable plate 1104 is slidably arranged on the connecting block 1101 and threadedly connected with the lead screw 1103; the air extraction pump 1105 is installed on the top of the movable plate 1104 and electrically connected with the controller 2; the positioning pipe 1106 is also installed on the movable plate 1104 and the upper end thereof is in communication with the air inlet of the air extraction pump 1105.

[0032] In use, the handle 802 is pulled to drive the limiting plate 801 to rotate and open, so that the limiting plate 801 is separated from the magnetic block 803 on the storage rack 5, then the viscosity tube 101 is placed in position, the viscosity tube 101 is pushed to the position close to the abutting plate 6, until the viscosity tube 101 contacts with the abutting plate 6, so as to ensure that the viscosity tube 101 is in a vertical state, then the viscosity tube 101 is pulled to move downward, so that the lower side of the viscosity tube 101 is clamped into the limiting frame 7, and the bottom of the viscosity tube 101 contacts with the inner bottom of the limiting frame 7, so as to support the viscosity tube 101 by the limiting frame 7, then the handle 802 is pushed to drive the limiting plate 801 to reverse and close, so that the limiting plate 801 contacts with the magnetic block 803 on the storage rack 5, so as to limit the limiting plate 801 by the magnetic block 803, thereby limiting the viscosity tube 101 by the limiting plate 801, and further fixing the viscosity tube 101 on the abutting plate 6 and the limiting frame 7, so that the user can conveniently place the viscosity tube 101 in a vertical state (such as Figure 4The viscosity tube 101 is placed on the support rack 5, and the stop plate 6 and the limiting frame 7 are placed on the viscosity tube 101, and then an appropriate amount of ethylene tar stabilizer is poured into the viscosity tube 101, and then the clear water in the transparent constant-temperature bath box 3 is heated to a specified temperature by controlling the controller 2, and after the clear water in the transparent constant-temperature bath box 3 is heated to the specified temperature, the support rack 5, the stop plate 6 and the limiting frame 7 are driven downward by controlling the electric sliding rail 402 by the controller 2, so that the stop plate 6 and the limiting frame 7 drive the viscosity tube 101 to descend into the clear water in the transparent constant-temperature bath box 3, until the upper side of the support rack 5 and the bottom of the limiting plate 801 contact the top of the transparent constant-temperature bath box 3, so as to cover the top of the transparent constant-temperature bath box 3 by the upper side of the support rack 5 and the limiting plate 801, and the viscosity tube 101 is in the clear water in the transparent constant-temperature bath box 3, so that the viscosity tube 101 is in the specified temperature for detection, and then the servo motor 1102 drives the lead screw 1103 to rotate by controlling the controller 2, so that the lead screw 1103 drives the movable plate 1104, the air pump 1105 and the positioning tube 1106 to move downward, until the positioning tube 1106 contacts the viscosity tube 101, so that the positioning tube 1106 is connected with one of the openings of the viscosity tube 101, and then the air pump 1105 is started by controlling the controller 2, so that the air pump 1105 draws the air in the viscosity tube 101 through the positioning tube 1106, so that the ethylene tar stabilizer in the viscosity tube 101 rises to the side close to the positioning tube 1106, and then the liquid level of the ethylene tar stabilizer in the viscosity tube 101 gradually rises, when the top surface of the ethylene tar stabilizer rises in the viscosity tube 101 to align with the upper non-contact liquid level sensor 10, the upper non-contact liquid level sensor 10 sends a signal, when the controller 2 receives the signal, the air pump 1105 is closed, and the servo motor 1102 drives the lead screw 1103 to reverse by controlling the controller 2, so that the lead screw 1103 drives the movable plate 1104, the air pump 1105 and the positioning tube 1106 to move upward and reset, so that the positioning tube 1106 is separated from the viscosity tube 101, and the controller 2 starts timing, when the air pump 1105 is closed, the raised ethylene tar stabilizer in the viscosity tube 101 gradually descends under the influence of gravity, when the top surface of the ethylene tar stabilizer descends to align with the lower non-contact liquid level sensor 10, the lower non-contact liquid level sensor 10 sends a signal, when the controller 2 receives the signal, the timing is stopped, so that the time used by the ethylene tar stabilizer to descend in the viscosity tube 101 by a specified height (the specified height is the height difference between the two non-contact liquid level sensors 10) can be obtained, and then the support rack 5, the stop plate 6 and the limiting frame 7 are driven upward and reset by controlling the electric sliding rail 402 by the controller 2, so that the stop plate 6 and the limiting frame 7 drive the viscosity tube 101 to rise and leave the clear water in the transparent constant-temperature bath box 3, and the lower side of the support rack 5 contacts the top of the transparent constant-temperature bath box 3, so as to close the transparent constant-temperature bath box 3 by the lower side of the support rack 5, so as to reduce the influence of the outside on the temperature of the clear water in the transparent constant-temperature bath box 3,Then repeat the operation to obtain a plurality of sets of data, and then use these data, namely, the kinematic viscosity of ethylene tar stabilizer; and the viscometer by setting three racks 5, can be simultaneously sent into the three viscosity tube 101 in the transparent thermostat box 3, so, can make three viscosity tube 101 simultaneously in the specified temperature, so that one-time three experimental test, improve the work efficiency of experiment; subsequent when the detection experiment is finished, pull the handle 802 again to drive the limiting plate 801 to rotate and open, make the limiting plate 801 and the magnetic block 803 on the rack 5 separate, then lift the viscosity tube 101 to move upwards, make the lower side of the viscosity tube 101 from the limiting frame 7, and make the bottom of the viscosity tube 101 and the bottom of the limiting frame 7 separate, then pull the viscosity tube 101 to the position away from the stop plate 6, make the viscosity tube 101 and the stop plate 6 separate, so as to take out the viscosity tube 101, finally push the handle 802 to drive the limiting plate 801 to reverse and close, make the limiting plate 801 and the magnetic block 803 on the rack 5 contact.

[0033] Referring to Figure 6 and Figure 7 As shown in the figure, it also includes a rubber sleeve 12; the outer wall of the lower end of the positioning pipe 1106 is provided with a rubber sleeve 12, which is used for sealing between the viscosity tube 101 and the positioning pipe 1106.

[0034] By setting the rubber sleeve 12, the rubber sleeve 12 can be used to seal between the viscosity tube 101 and the positioning pipe 1106 when the positioning pipe 1106 and the viscosity tube 101 are connected, so as to improve the sealing between the viscosity tube 101 and the positioning pipe 1106.

[0035] Referring to Figure 6 and Figure 7 As shown in the figure, it also includes a drying box 13; the positioning pipe 1106 is detachably mounted with a drying box 13, which is used for drying the gas in the positioning pipe 1106.

[0036] When in use, the drying box 13 can be pulled out from the positioning pipe 1106, then the drying agent is put into the drying box 13, and the drying box 13 is pushed back to the original position; then when the viscosity tube 101 is fixed, the controller 2 is used to control the servo motor 1102 to drive the lead screw 1103 to rotate, so that the lead screw 1103 drives the movable plate 1104, the air pump 1105 and the positioning pipe 1106 to move downwards until the positioning pipe 1106 is connected with the viscosity tube 101, then the controller 2 is used to control the air pump 1105 to blow air in the positioning pipe 1106, when the air flows in the positioning pipe 1106, the drying box 13 dries the air in the positioning pipe 1106, and the dried air flows into the viscosity tube 101 to replace the air in the viscosity tube 101, so that the air in the viscosity tube 101 is dried, and the viscosity tube 101 is prevented from being too wet to affect the experimental detection, after the air in the viscosity tube 101 is replaced, the controller 2 is used to control the air pump 1105 to stop blowing air in the positioning pipe 1106, then the controller 2 is used to control the servo motor 1102 to drive the lead screw 1103 to reverse and reset, so that the lead screw 1103 drives the movable plate 1104, the air pump 1105 and the positioning pipe 1106 to move upwards and reset, so that the positioning pipe 1106 is separated from the viscosity tube 101.

[0037] As shown in Figure 8 The cooling mechanism further comprises a fan 14, an air outlet frame 15 and an air pipe 16; the fan 14 is installed on the top rear side of the base 1 and is electrically connected with the controller 2; the air outlet frame 15 is installed on the top of the transparent constant-temperature bath box 3, and the air pipe 16 is in communication with the air outlet of the fan 14 and the air outlet frame 15.

[0038] When the viscosity tube 101 is lifted out of the water in the transparent constant-temperature bath box 3 by the stop plate 6 and the limiting frame 7, if the user needs to take out the viscosity tube 101, the controller 2 is used to control the fan 14 to start, so that the fan 14 introduces air into the air outlet frame 15 through the air pipe 16, so that the air outlet frame 15 introduces air into the outer surface of the viscosity tube 101, so as to blow the outer surface of the viscosity tube 101 and cool the viscosity tube 101, so as to prevent the user from being scalded when taking out the viscosity tube 101; when the viscosity tube 101 is cooled, the controller 2 is used to control the fan 14 to be closed.

[0039] As shown in Figure 3 and Figure 9 The sealing gasket 17 is arranged on the upper and lower sides of the limiting frame 7 and the bottom of the limiting plate 801, and is used to seal the transparent constant-temperature bath box 3 between the object shelf 5 and the limiting plate 801.

[0040] When the lower side of the shelf 5 contacts the inner top of the transparent constant temperature bath box 3, the sealing gasket 17 seals the space between the lower side of the shelf 5 and the inner top of the transparent constant temperature bath box 3; when the upper side of the shelf 5 and the bottom of the limiting plate 801 contact the top of the transparent constant temperature bath box 3, the sealing gasket 17 seals the space between the upper side of the shelf 5 and the bottom of the limiting plate 801 and the top of the transparent constant temperature bath box 3; thereby improving the sealing performance and reducing the influence of the outside on the temperature of the clear water in the transparent constant temperature bath box 3.

[0041] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. A viscometer for ethylene tar stabilizer detection, comprising a base (1), a controller (2) and a transparent constant temperature bath box (3), the controller (2) and the transparent constant temperature bath box (3) are installed on the base (1), characterized in that, The lifting mechanism, the storage rack (5), the abutting plate (6), the limiting frame (7), the fixing mechanism, the support (9), the non-contact liquid level sensor (10) and the air extraction mechanism are further included. The lifting mechanism is arranged on the top of the transparent constant temperature bath box (3). The storage rack (5) is arranged on the lifting mechanism in a spaced manner. The lifting mechanism is used for driving the storage rack (5) to lift. The abutting plate (6) and the limiting frame (7) are arranged on the storage rack (5). The abutting plate (6) and the limiting frame (7) are used for limiting the viscosity tube (101). The abutting plate (6) is used for ensuring that the viscosity tube (101) is in a vertical state. The limiting frame (7) is used for supporting the viscosity tube (101). The fixing mechanism is arranged on the storage rack (5) and used for fixing the viscosity tube (101). The support (9) is arranged on the abutting plate (6). Two non-contact liquid level sensors (10) are arranged on the support (9) in an up-down distribution. The non-contact liquid level sensor (10) is used for detecting the liquid level in the viscosity tube (101). The air extraction mechanism is arranged on the lifting mechanism and used for extracting air from the viscosity tube (101) to drive the liquid in the viscosity tube (101) to a suitable height. The lifting mechanism includes the support column (401) and the electric sliding rail (402). The support column (401) is arranged on the top of the transparent constant temperature bath box (3). The electric sliding rail (402) is arranged on the outer wall of the support column (401) in a spaced manner. The storage rack (5) is connected with the sliding block of the electric sliding rail (402). The fixing mechanism includes the limiting plate (801), the handle (802) and the magnetic block (803). The limiting plate (801) is rotatably arranged on the storage rack (5) and used for fixing the viscosity tube (101) on the abutting plate (6) and the limiting frame (7). The handle (802) is connected with the limiting plate (801). The magnetic block (803) is arranged on the storage rack (5) and the limiting plate (801) and used for limiting the limiting plate (801) by magnetic attraction. The air extraction mechanism includes the connecting block (1101), the servo motor (1102), the lead screw (1103), the movable plate (1104), the air extraction pump (1105) and the positioning tube (1106). The connecting block (1101) is further connected with the sliding block of the electric sliding rail (402). The servo motor (1102) is arranged on the connecting block (1101). The output shaft of the servo motor (1102) is connected with the lead screw (1103). The movable plate (1104) is slidably arranged on the connecting block (1101) and threadedly connected with the lead screw (1103). The air extraction pump (1105) is arranged on the movable plate (1104). The positioning tube (1106) is further arranged on the movable plate (1104) and in communication with the air inlet of the air extraction pump (1105). The cooling mechanism comprises a fan (14), an air outlet frame (15) and an air pipe (16), the fan (14) is installed on the base (1), the air outlet frame (15) is installed on the top of the transparent constant-temperature bath box (3), and the air pipe (16) is communicated with the air outlet of the fan (14) and the air outlet frame (15) respectively.

2. A viscometer for the detection of ethylene tar stabilizer according to claim 1, characterized in that The rubber sleeve (12) is arranged on the outer wall of the other end of the positioning pipe (1106), and is used for sealing between the viscosity pipe (101) and the positioning pipe (1106).

3. A viscometer for the detection of ethylene tar stabilizer according to claim 2, characterized in that The drying box (13) is installed on the positioning pipe (1106), and is used for drying the gas in the positioning pipe (1106).

4. A viscometer for the detection of ethylene tar stabilizer according to claim 3, characterized in that The sealing gasket (17) is arranged on the storage rack (5) and the limiting plate (801), and is used for sealing between the storage rack (5), the limiting plate (801) and the transparent constant-temperature bath box (3).

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