A material volatility characteristic test device and test method

Abstract

The invention discloses a material volatility characteristic test device and a test method thereof, which relate to the field of material testing equipment, and include a drying box and a hot air generator, wherein one side of the drying box is connected to an air inlet pipe, and the end of the air inlet pipe is connected to the hot air generator for conveying hot air into the air inlet pipe; the material volatility characteristic test device and the test method thereof drive a support frame to rotate alternately around two A rotation axis lines through a B driving mechanism, so that under the drive of a clamp, a sample rotates alternately around the two A rotation axis lines, and the sample rotates in the drying box with a supporting tray at different elevation angles, so that the sample can move more comprehensively through the connection between the air inlet pipe on the drying box and the drying box, so that the sample can contact the air more comprehensively, and the sample can be heated more evenly, so as to reduce the influence on the release of volatile components of the sample due to poor ventilation effect at some positions of the sample and inconsistent local heating conditions of the sample, thereby improving the accuracy of the experimental results.

Description

Technical Field

[0001] The invention relates to material testing equipment technology, and in particular to a material volatility characteristic testing device and a testing method thereof. Background Art

[0002] The desiccator method is one of the experimental methods commonly used to measure the volatility characteristics of materials. This method uses a device called a desiccator to place the sample to be tested at a specific temperature, and evaporate the volatile components in the sample by heating and ventilation. The content or volatility of the volatile components is determined by the change in weight. When the desiccator method is used to measure the volatility characteristics of solid materials, the material is usually tested in the form of thin sheets to better contact heating and ventilation. Thin sheets or granular samples can usually release volatile components faster and can improve the sensitivity of the experiment. However, when testing such materials, the sample is usually placed directly on the sample boat or sample dish of the desiccator. The ventilation effect of the part of the sample that contacts the sample boat is poor, and it is easy to cause the side of the sample that contacts the sample boat to be heated by the heat conduction of the sample boat to be inconsistent with the heating condition of the upper surface of the sample, which affects the release of the volatile components of the sample and the accuracy of the experimental results. Summary of the invention

[0003] The purpose of the present invention is to provide a material volatility characteristic test device and a test method thereof to solve the above-mentioned deficiencies in the prior art.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a material volatility characteristic test device, comprising a drying box and a hot air generator, one side of the drying box is connected to an air inlet pipe, the end of the air inlet pipe is connected to a hot air generator for conveying hot air into the air inlet pipe, the top of the drying box is connected to an exhaust pipe, a support tray is arranged inside the drying box, a heating component is arranged on the top of the support tray, and the heating component is fixedly installed on the top of the inner cavity of the drying box;

[0005] The bottom of the tray is connected to a driving mechanism A for driving the tray to rotate around its own axis;

[0006] A plurality of supporting mechanisms are arranged in a circular array along the axis of the support tray on the upper surface thereof, the supporting mechanism comprising a mounting frame, a supporting frame being arranged on the upper portion of the mounting frame, a fixture for clamping and fixing the sample being arranged on the supporting frame, an A rotating shaft being fixedly connected to both ends of the supporting frame along the length direction thereof, and a B driving mechanism for driving the supporting frame to rotate alternately around two A rotating shaft axes being connected to one side of the supporting frame.

[0007] Furthermore, the A driving mechanism includes a supporting sleeve, the top end of the supporting sleeve is fixedly connected to the supporting tray, one end of the supporting sleeve passes through the drying box and is fixedly connected to the A gear, the outer side surface of the supporting sleeve is rotatably connected to the drying box, one side of the A gear is meshed with the B gear, and one side of the B gear is connected to a rotating driving member that drives it to rotate around its own axis.

[0008] Furthermore, the clamp includes two clamping members, which are symmetrically arranged on the support frame. One side of the two clamping members is connected to a first guide member for driving them to move along the width direction of the support frame. The two clamping members are connected to the same A driving component for driving the two clamping members to move toward or in opposite directions.

[0009] Furthermore, the A driving component is a screw, both ends of which are rotatably connected to the support frame respectively, and the screw is symmetrically provided with two threads with opposite rotation directions, and the screw is threadably connected to the two clamping members respectively through the two threads.

[0010] Furthermore, the B drive mechanism includes a sliding frame, the bottom of both sides of the sliding frame are slidably connected to the mounting frame, one side of the sliding frame is connected to a B drive component that drives it to move along the length direction of the mounting frame, four racks are fixedly installed on the upper part of the sliding frame, the four racks are distributed at the four corners of the sliding frame, and the length of the racks is in the opposite direction of the direction in which the sliding frame can slide along the mounting frame, and one side of the four racks is provided with a special-shaped gear, and the side surface of the special-shaped gear is fixedly connected to the end of the adjacent A rotating shaft. When the B drive component drives the sliding frame to move, the special-shaped gear installed on one of the A rotating shafts can mesh with its adjacent rack.

[0011] Furthermore, four receiving seats are fixedly installed on the mounting frame, and an arc-shaped groove matching the outer side surface of the A rotating shaft is opened on the top of the receiving seat, and the arc-shaped groove is used to receive the A rotating shaft. The four receiving seats are distributed at the four corners of the upper surface of the mounting frame, and an L-shaped plate is arranged on one side of the receiving seat. The bottom of the L-shaped plate is fixedly connected to the sliding frame. Before the sliding frame moves to the rack located at one end of the length direction of the sliding frame to mesh with the special-shaped gear, one side of the L-shaped plate is located on the upper surface of the A rotating shaft, and the L-shaped plate prevents the A rotating shaft from escaping from the arc-shaped groove.

[0012] Furthermore, the B drive assembly includes a fixed column, the bottom end of the fixed column is fixedly connected to the drying box, the top of the fixed column is fixedly connected to a face gear, a plurality of driven gears are meshed on one side of the face gear, the number of the driven gears is the same as the number of the supporting mechanism and corresponds one to one, a reciprocating screw is fixedly sleeved on the inner side of the driven gear, a connecting sleeve is threadedly connected to the outer side of the reciprocating screw, the outer end of the reciprocating screw close to the driven gear and the other end are rotatably connected to the supporting tray, a connecting plate is fixedly connected to the outer side of the connecting sleeve, and the end of the connecting plate away from the driven gear is fixedly connected to the sliding frame adjacent to it.

[0013] A material volatility characteristic test method, applicable to the material volatility characteristic test device described above, comprises the following steps:

[0014] S1. Prepare multiple samples of the same shape and size, accurately weigh the mass of the samples using a precision balance, and record the initial mass;

[0015] S2. Open the drying oven and fix the prepared samples by the clamps in the supporting mechanism;

[0016] S3, start the hot air generator and turn on the heating components, and adjust the temperature in the drying box to a preset temperature;

[0017] S4, restart the A drive mechanism, and drive the support frame to rotate alternately around the two A rotation axis lines through the B drive mechanism;

[0018] S5. Take out samples regularly, use a precision balance to measure the mass change of the samples, and record the time and mass of each measurement;

[0019] S6. After completing the experiment, turn off the heating components and hot air generator, and stop heating and ventilation.

[0020] Compared with the prior art, the present invention provides a material volatility characteristic test device and a test method thereof, wherein a support frame is driven by a B drive mechanism to rotate alternately around two A rotation axis lines, so that the sample is rotated alternately around the two A rotation axis lines under the drive of a clamp, and the sample rotates in a drying oven with a supporting tray at different elevation angles, so that the sample can move more comprehensively through the connection between the air inlet duct on the drying oven and the drying oven, so that the sample can be more comprehensively exposed to air, and the sample can be heated more evenly, reducing the impact on the release of volatile components of the sample due to poor ventilation effect in some parts of the sample and inconsistent local heating of the sample, thereby improving the accuracy of the experimental results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the overall external structure provided by an embodiment of the present invention;

[0023] Figure 2 A schematic cross-sectional view of an embodiment of the present invention;

[0024] Figure 3A schematic diagram of the coordination of the support sleeve, gear A, gear B and bearing tray provided in an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the coordination of a fixed column, a face gear, a driven gear and a reciprocating screw provided in an embodiment of the present invention;

[0026] Figure 5 The embodiment of the present invention provides Figure 2 A is an enlarged schematic diagram;

[0027] Figure 6 A schematic diagram of a first partial structure provided for an embodiment of the present invention;

[0028] Figure 7 A second partial structural schematic diagram provided for an embodiment of the present invention;

[0029] Figure 8 A third partial structural diagram provided for an embodiment of the present invention;

[0030] Fig. 9 A fourth partial structural diagram provided for an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1. Drying box; 2. Air inlet duct; 3. Exhaust duct; 4. Support tray; 5. Heating components; 6. A drive mechanism; 61. Support sleeve; 62. A gear; 63. B gear; 64. Rotary drive member; 7. Support mechanism; 71. Mounting frame; 72. Support frame; 73. Clamp; 731. Clamping member; 732. First guide member; 733. A drive assembly; 74. A rotating shaft; 75. B drive mechanism; 750. Special-shaped gear; 751. Sliding frame; 752. Rack; 753. B drive assembly; 7531. Fixed column; 7532. Face gear; 7533. Driven gear; 7534. Reciprocating screw; 7535. Connecting sleeve; 7536. Connecting plate; 754. Socket; 755. L-shaped plate. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] Embodiment 1:

[0035] See also Figures 1 to 9A material volatility characteristic test device comprises a drying box 1 and a hot air generator, one side of the drying box 1 is connected with an air inlet pipe 2, the end of the air inlet pipe 2 is connected with a hot air generator for conveying hot air into the air inlet pipe 2, the top of the drying box 1 is connected with an exhaust pipe 3, a support tray 4 is arranged inside the drying box 1, a heating element 5 is arranged on the top of the support tray 4, and the heating element 5 is fixedly installed on the top of the inner cavity of the drying box 1;

[0036] The bottom of the tray 4 is connected to a driving mechanism A 6 for driving it to rotate around its own axis;

[0037] A plurality of supporting mechanisms 7 are arranged in a circular array along the axis of the support tray 4. The supporting mechanism 7 includes a mounting frame 71. A supporting frame 72 is provided on the mounting frame 71. A clamp 73 for clamping and fixing the sample is provided on the supporting frame 72. A rotating shaft 74 is fixedly connected to both ends of the supporting frame 72 along the length direction. A driving mechanism 75 for driving the supporting frame 72 to rotate alternately around the axes of the two rotating shafts 74 is connected to one side of the supporting frame 72.

[0038] In order to solve the problem that the ventilation effect of some parts of the sample is poor and the heating conditions of the sample are inconsistent, which affects the release of the volatile components of the sample and the accuracy of the experimental results, a plurality of samples of the same shape and size are fixed by clamps 73 in a plurality of supporting mechanisms 7. After the samples are fixed, hot air is transported to the inside of the air inlet pipe 2 through a hot air generator, and the hot air enters the drying box 1. The hot air generator is composed of a heater and a fan. The heater converts electrical energy into thermal energy to generate hot air, which is then circulated to the air inlet pipe 2 through the fan, and then enters the drying box 1 from the air inlet pipe 2. The air is guided to the sample and provides a heating effect on the sample.

[0039] Turn on the heating element 5, which is an electric heating tube, a heating wire or a heating plate, and drive the support frame 72 to rotate alternately around the two A rotating shafts 74 through the B driving mechanism 75, so that the sample rotates alternately around the two A rotating shafts 74 under the drive of the clamp 73, and the sample rotates with the supporting tray 4 in the drying box 1 at different elevation angles, so that the sample can move more comprehensively through the connection between the air inlet pipe 2 on the drying box 1 and the drying box 1, so that the sample can be more comprehensively exposed to the air and the sample can be heated more evenly, reducing the release of volatile components of the sample due to poor ventilation effect in some parts of the sample and inconsistent local heating of the sample, thereby improving the accuracy of the experimental results.

[0040] In one embodiment of the present invention, the A driving mechanism 6 includes a supporting sleeve 61, the top of the supporting sleeve 61 is fixedly connected to the supporting tray 4, one end of the supporting sleeve 61 passes through the drying box 1 and is fixedly connected to the A gear 62, the outer side of the supporting sleeve 61 is rotatably connected to the drying box 1, one side of the A gear 62 is meshed with the B gear 63, and one side of the B gear 63 is connected to a rotating driving member 64 that drives it to rotate around its own axis;

[0041] During operation, the rotary drive member 64 drives the B gear 63 to rotate, the B gear 63 drives the A gear 62 to rotate, the A gear 62 drives the bearing tray 4 to rotate through the supporting sleeve 61, thereby driving the multiple supporting mechanisms 7 on the bearing tray 4 to rotate;

[0042] In one embodiment of the present invention, the rotary driving member 64 is a motor or a rotary cylinder, the rotary driving member 64 is fixedly mounted on the drying box 1 , and the B gear 63 is fixedly sleeved on the outside of the output shaft of the rotary driving member 64 .

[0043] In one embodiment of the present invention, the clamp 73 includes two clamping members 731, which are symmetrically arranged on the support frame 72, and one side of each of the two clamping members 731 is connected to a first guide member 732 for driving the two clamping members 731 to move along the width direction of the support frame 72, and the two clamping members 731 are connected to the same A driving assembly 733 for driving the two clamping members 731 to move toward or in the opposite direction;

[0044] During operation, the first guide member 732 limits the moving direction of the clamping member 731, and the two clamping members 731 are driven by the A driving assembly 733 to move downward to clamp the sample;

[0045] In one embodiment of the present invention, the first guide member 732 is two guide rods, both ends of the two guide rods are fixedly connected to the support frame 72, the length direction of the guide rods is the same as the width direction of the support frame 72, and the outside of the guide rods is slidably connected to the two clamping members 731 respectively;

[0046] In one embodiment of the present invention, the A drive component 733 is a screw rod, both ends of which are rotatably connected to the support frame 72, and the screw rod is symmetrically provided with two threads with opposite rotation directions. The screw rod is threadably connected to the two clamping members 731 through the two threads.

[0047] In one embodiment of the present invention, the B driving mechanism 75 includes a sliding frame 751, the bottoms of both sides of the sliding frame 751 are slidably connected to the mounting frame 71, one side of the sliding frame 751 is connected to a B driving assembly 753 for driving it to move along the length direction of the mounting frame 71, four racks 752 are fixedly installed on the upper part of the sliding frame 751, the four racks 752 are distributed at the four corners of the sliding frame 751, and the length of the racks 752 is the same as the direction in which the sliding frame 751 can slide along the mounting frame 71, one side of the four racks 752 is provided with a special-shaped gear 750, the side of the special-shaped gear 750 is fixedly connected to the end of the A rotating shaft 74 adjacent to it, when the B driving assembly 753 drives the sliding frame 751 to move, the special-shaped gear 750 installed on one of the A rotating shafts 74 can mesh with its adjacent rack 752;

[0048] Four receiving seats 754 are fixedly installed on the mounting frame 71. The top of the receiving seat 754 is provided with an arc-shaped groove matched with the outer side of the A rotating shaft 74. The arc-shaped groove is used to receive the A rotating shaft 74. The four receiving seats 754 are distributed at the four corners of the upper surface of the mounting frame 71. An L-shaped plate 755 is arranged on one side of the receiving seat 754. The bottom of the L-shaped plate 755 is fixedly connected to the sliding frame 751. Before the sliding frame 751 moves to the rack 752 at one end of the sliding frame 751 in the length direction and meshes with the special-shaped gear 750, one side of the L-shaped plate 755 is located on the upper surface of the A rotating shaft 74. The L-shaped plate 755 prevents the A rotating shaft 74 from leaving the arc-shaped groove.

[0049] In one embodiment of the present invention, the B driving assembly 753 includes a fixed column 7531, the bottom end of the fixed column 7531 is fixedly connected to the drying box 1, the top of the fixed column 7531 is fixedly connected to a face gear 7532, one side of the face gear 7532 is meshed with a plurality of driven gears 7533, the number of the driven gears 7533 is the same as the number of the supporting mechanism 7, and they correspond one to one, a reciprocating screw 7534 is fixedly sleeved on the inner side of the driven gear 7533, the outer side of the reciprocating screw 7534 is threadedly connected to a connecting sleeve 7535, the outer end of the reciprocating screw 7534 close to the driven gear 7533 and the other end are both rotatably connected to the supporting tray 4, the outer side of the connecting sleeve 7535 is fixedly connected to a connecting plate 7536, and the end of the connecting plate 7536 away from the driven gear 7533 is fixedly connected to the sliding frame 751 adjacent to it;

[0050] During operation, since the face gear 7532 is fixed, the bearing tray 4 rotates and drives the reciprocating screw 7534 to rotate around the axis of the supporting sleeve 61, so that the driven gear 7533 drives the reciprocating screw 7534 connected thereto to rotate, and since the sliding frame 751 is slidably connected to the mounting frame 71, the connecting sleeve 7535 drives the sliding frame 751 to reciprocate through the connecting plate 7536 under the drive of the reciprocating screw 7534. After the sliding frame 751 moves toward one end in the length direction of the mounting frame 71, the side of the L-shaped plate 755 away from the connecting plate 7536 first moves to the upper surface of the A rotating shaft 74 on one side, so that the L-shaped plate 755 blocks the A rotating shaft The shaft 74 is disengaged from the arc groove. At this time, the rack 752 of the L-shaped plate 755 away from the connecting plate 7536 is meshed with its adjacent special-shaped gear 750. The rack 752 moves to drive the special-shaped gear 750 to rotate. Driven by the special-shaped gear 750, the support frame 72 rotates around the axis of the A rotating shaft 74 away from the connecting plate 7536. Similarly, after the sliding frame 751 moves to one end in the length direction of the mounting frame 71, the support frame 72 rotates around the other axis of the A rotating shaft 74, so that the sample can be more fully in contact with the hot air when the volatility characteristics are tested in the drying oven 1, and the occurrence of uneven local heating of the sample is reduced.

[0051] Embodiment 2:

[0052] A material volatility characteristic test method, applicable to the above-mentioned material volatility characteristic test device, comprises the following steps:

[0053] S1. Prepare multiple samples of the same shape and size, accurately weigh the mass of the samples using a precision balance, and record the initial mass;

[0054] S2, opening the drying oven 1, and fixing the prepared samples respectively through the clamps 73 in the supporting mechanism 7;

[0055] S3, start the hot air generator and turn on the heating element 5, and adjust the temperature in the drying oven 1 to a preset temperature;

[0056] S4, restart the A drive mechanism 6, and drive the support frame 72 to rotate alternately around the two A rotation shafts 74 through the B drive mechanism 75;

[0057] S5. Take out samples regularly, use a precision balance to measure the mass change of the samples, and record the time and mass of each measurement;

[0058] S6. After the experiment is completed, turn off the heating element 5 and the hot air generator, and stop heating and ventilation.

[0059] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A material volatility test device, comprising a drying box (1) and a hot air generator, wherein one side of the drying box (1) is connected to an air inlet pipe (2), the end of the air inlet pipe (2) is connected to the hot air generator for conveying hot air into the air inlet pipe (2), and the top of the drying box (1) is connected to an exhaust pipe (3), characterized in that: A support tray (4) is arranged inside the drying box (1), a heating element (5) is arranged on the top of the support tray (4), and the heating element (5) is fixedly installed on the top of the inner cavity of the drying box (1); The bottom of the support tray (4) is connected to a driving mechanism (6) for driving the support tray (4) to rotate around its own axis. A plurality of supporting mechanisms (7) are arranged in a circular array on the upper surface of the supporting tray (4) along the axis thereof as the center, the supporting mechanism (7) comprising a mounting frame (71), a supporting frame (72) being arranged on the upper part of the mounting frame (71), a clamp (73) for clamping and fixing the sample being arranged on the supporting frame (72), both ends of the supporting frame (72) along the length direction thereof being fixedly connected to A rotating shafts (74), and a B driving mechanism (75) for driving the supporting frame (72) to rotate alternately around the axes of the two A rotating shafts (74) being connected to one side of the supporting frame (72); The B driving mechanism (75) comprises a sliding frame (751), the bottoms of both sides of the sliding frame (751) are slidably connected to the mounting frame (71), one side of the sliding frame (751) is connected to a B driving assembly (753) for driving the sliding frame (751) to move along the length direction of the mounting frame (71), four racks (752) are fixedly mounted on the upper part of the sliding frame (751), the four racks (752) are distributed at four corners of the sliding frame (751), and the length of the racks (752) is the same as the direction in which the sliding frame (751) can slide along the mounting frame (71), one side of the four racks (752) is provided with a special-shaped gear (750), the side surface of the special-shaped gear (750) is fixedly connected to the end of the A rotating shaft (74) adjacent thereto, and when the B driving assembly (753) drives the sliding frame (751) to move, the special-shaped gear (750) mounted on one of the A rotating shafts (74) can mesh with the adjacent rack (752); Four receiving seats (754) are fixedly mounted on the mounting frame (71), and an arc-shaped groove matching the outer side surface of the A rotating shaft (74) is formed on the top of the receiving seat (754), and the arc-shaped groove is used to receive the A rotating shaft (74). The four receiving seats (754) are distributed at four corners of the upper surface of the mounting frame (71), and an L-shaped plate (755) is arranged on one side of the receiving seat (754). The bottom of the L-shaped plate (755) is fixedly connected to the sliding frame (751). Before the sliding frame (751) moves to the point where the rack (752) located at one end of the sliding frame (751) in the length direction meshes with the special-shaped gear (750), one side of the L-shaped plate (755) is located on the upper surface of the A rotating shaft (74), and the L-shaped plate (755) prevents the A rotating shaft (74) from leaving the arc-shaped groove. The B driving assembly (753) comprises a fixed column (7531), the bottom end of which is fixedly connected to the drying box (1), the top of which is fixedly connected to a face gear (7532), one side of which is meshed with a plurality of driven gears (7533), the number of which is the same as the number of the supporting mechanism (7) and corresponds to one another, a reciprocating screw (7534) is fixedly sleeved on the inner side of the driven gear (7533), the outer side of the reciprocating screw (7534) is threadedly connected to a connecting sleeve (7535), the outer side of the reciprocating screw (7534) close to the driven gear (7533) and the other end are both rotatably connected to the supporting tray (4), the outer side of the connecting sleeve (7535) is fixedly connected to a connecting plate (7536), and the end of the connecting plate (7536) away from the driven gear (7533) is fixedly connected to the sliding frame (751) adjacent thereto.

2. A material volatility characteristic testing device according to claim 1, characterized in that: The A driving mechanism (6) comprises a supporting sleeve (61), the top end of the supporting sleeve (61) being fixedly connected to the supporting tray (4), one end of the supporting sleeve (61) passing through the drying box (1) and being fixedly connected to an A gear (62), the outer side surface of the supporting sleeve (61) being rotatably connected to the drying box (1), one side of the A gear (62) being meshed with a B gear (63), and one side of the B gear (63) being connected to a rotating driving member (64) for driving the B gear (63) to rotate around its own axis.

3. A material volatility characteristic testing device according to claim 1, characterized in that: The clamp (73) comprises two clamping members (731), the two clamping members (731) are symmetrically arranged on the support frame (72), one side of the two clamping members (731) is connected to a first guide member (732) for driving the two clamping members (731) to move along the width direction of the support frame (72), and the two clamping members (731) are connected to the same A driving assembly (733) for driving the two clamping members (731) to move towards or in opposite directions.

4. A material volatility characteristic testing device according to claim 3, characterized in that: A driving assembly (733) is a screw rod, both ends of which are rotatably connected to the support frame (72), and the screw rod is symmetrically provided with two threads with opposite rotation directions, and the screw rod is threadably connected to the two clamping members (731) through the two threads.

5. A material volatility characteristics test method, characterized in that: A material volatility characteristic testing device applicable to any one of claims 1 to 4, comprising the following steps: S1. Prepare multiple samples of the same shape and size, accurately weigh the mass of the samples using a precision balance, and record the initial mass; S2, opening the drying oven (1), and fixing the prepared samples respectively by means of the clamps (73) in the supporting mechanism (7); S3, starting the hot air generator and turning on the heating element (5), and adjusting the temperature in the drying oven (1) to a preset temperature; S4, restarting the A drive mechanism (6), and driving the support frame (72) to rotate alternately around the two A rotation shafts (74) through the B drive mechanism (75); S5. Take out samples regularly, use a precision balance to measure the mass change of the samples, and record the time and mass of each measurement; S6. After the experiment is completed, turn off the heating element (5) and the hot air generator, and stop heating and ventilation.

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