Fully-sealed drying oven

Abstract

The utility model discloses a full-sealed drying oven which comprises a drying oven body, a rotary table mechanism and a heating mechanism are arranged in the drying oven body, a weighing mechanism is further arranged below the drying oven body, the weighing mechanism comprises a driving assembly, a balance assembly, a supporting shaft, a top shaft and a supporting plate, one end of the supporting shaft is connected with the balance assembly, and the other end of the supporting shaft is connected with the top shaft. The other end of the supporting shaft is movably connected with the top shaft, the supporting plate is arranged above the top shaft, the driving assembly is used for driving the balance assembly, the supporting shaft and the top shaft to move up and down, a through hole for the top shaft to penetrate through is formed in a bottom plate of the drying box body, a sealing sleeve is arranged above the through hole, and the top shaft is matched with the sealing sleeve to achieve sealing of the drying box body in the weighing process. The device has the advantages of being simple in structure, good in sealing effect, capable of effectively preventing samples from being oxidized, high in detection result precision and the like.

Description

Technical Field

[0001] The utility model mainly relates to the field of material sample collection and analysis equipment, in particular to a fully sealed drying oven. Background Art

[0002] Each country has mandatory standards for the sampling and analysis of materials (such as ore and coal), which must be followed. The principle of the sampling and analysis process is to gradually reduce the sample size and mass, without compromising the sample's representativeness, until the sample meets the laboratory's particle size and mass (weight) accuracy requirements. The sample that meets these requirements is then subjected to relevant test analysis. During this process, no sample loss or physical or chemical changes can occur, as this would affect the final test results.

[0003] Taking coal analysis as an example, it is essentially a sampling and analysis process. Coal is a heterogeneous material (e.g., particle size, quality characteristics, and distribution). The parent material being sampled is generally large (ranging from tens to tens of thousands of tons). The process of extracting a sample that is as representative of the quality and characteristics of the entire parent material as possible is called "sampling." Currently, various sampling methods exist, including mechanical sampling, manual sampling, and semi-mechanical sampling. After the sample is collected according to standards, the next step is sample preparation, which generally includes air drying, crushing, reduction, and grinding. After the sample is prepared, the next step is sample testing and analysis. During the coal sampling and analysis process, moisture testing equipment is used to analyze the moisture content of the coal sample. Coal moisture content is the most fundamental indicator for evaluating the economic value of coal. Because changes in coal moisture content can cause changes in the content of other components and calorific value, they can have a certain impact on coal quality inspection, measurement, acceptance, and management. Therefore, accurate coal moisture measurement is of great significance to coal production management and operation. Of course, other material samples also require moisture content testing and analysis when necessary.

[0004] In the prior art, the moisture content of coal is usually detected using an oven (i.e., a drying oven). Some ovens do not have a weighing device inside. For example, Chinese patent application CN201510637977.9 discloses a drying oven for automatic testing equipment. When weighing the coal, it needs to be taken out for weighing. During the weighing process, the coal comes into contact with air and oxidizes, resulting in a low moisture result. Some practitioners also design the weighing component inside the oven. For example, Chinese patent application CN200720062702.8 discloses a moisture tester with an automatic weighing mechanism. In this solution, the weighing mechanism is set inside the chassis. The high temperature environment has an impact on the weighing mechanism and occupies the space of the chassis, making it difficult for the oven atmosphere to meet the national standard requirement of an oxygen content of no more than 0.01%. In addition, the sealing effect of the oven in the prior art is poor, resulting in deviations in the test results. How to avoid oxidation during sample weighing, make the weighing mechanism less susceptible to the influence of the high temperature environment, and ensure good sealing of the oven are technical problems that need to be solved urgently by those skilled in the art. Utility Model Content

[0005] In view of the technical problems existing in the prior art, the utility model provides a fully sealed oven with a simple structure, good sealing effect, the ability to effectively prevent samples from being oxidized, and high-precision detection results.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A fully sealed oven comprises a drying box body, wherein a turntable mechanism and a heating mechanism are provided in the drying box body, and a weighing mechanism is further provided below the drying box body, wherein the weighing mechanism comprises a driving assembly, a balance assembly, a support shaft, a top shaft and a supporting plate, wherein one end of the support shaft is connected to the balance assembly, and the other end of the support shaft is movably connected to the top shaft, and the supporting plate is arranged above the top shaft, and the driving assembly is used to drive the balance assembly, the support shaft and the top shaft to move up and down, and a through hole for the top shaft to pass through is provided on the bottom plate of the drying box body, and a sealing sleeve is provided above the through hole, and the top shaft and the sealing sleeve cooperate to realize the sealing of the drying box body during the weighing process.

[0008] As a further improvement of the present invention: the top shaft includes a conical section and a cylindrical section.

[0009] As a further improvement of the present invention: the inner surface of the sealing sleeve is a conical surface.

[0010] As a further improvement of the present invention: the driving assembly includes a first cylinder, a connecting bracket, a second cylinder and a fixed plate, the first cylinder is connected to the second cylinder through the connecting bracket, and the second cylinder is connected to the balance assembly through the fixed plate.

[0011] As a further improvement of the present invention: the turntable mechanism includes a sample tray for carrying a tray, a vertically established sample tray shaft and a rotating drive component, the sample tray is vertically connected to the sample tray shaft, the rotating drive component drives the sample tray to rotate horizontally through the sample tray shaft, and a plurality of positioning rings are also provided on the sample tray.

[0012] As a further improvement of the present invention: a plurality of layout stations are provided on the sample tray along the circumferential direction, and each of the layout stations is provided with at least two or more support columns.

[0013] As a further improvement of the present invention: the rotary drive member is installed on a first support, and the first support is connected to the lower bottom wall of the drying box.

[0014] As a further improvement of the present invention: the drying box body also includes a second support, the second support is sleeved on the sample tray shaft, and a sealing ring is also provided between the second support and the sample tray shaft for sealing the sample tray shaft.

[0015] As a further improvement of the present invention, it further comprises a bearing assembly, which is arranged below the drying box body and sleeved on the sample plate shaft.

[0016] As a further improvement of the present invention: a heat insulating pad is provided between the bearing assembly and the drying box.

[0017] As a further improvement of the present invention: it also includes a positioning plate and a detection switch, the positioning plate is set on the sample plate rotation shaft, and the detection switch is installed on the first support. The positioning plate and the detection switch are used to detect whether the sample plate is rotated to a predetermined position.

[0018] As a further improvement of the present invention, an isolation cover is provided in the middle of the upper surface of the sample tray.

[0019] As a further improvement of the present invention: a cable installation hole is provided on the sample tray shaft.

[0020] As a further improvement of the present invention: a pad is provided at the bottom of the sample tray, and an electric heating plate is provided below the pad.

[0021] As a further improvement of the present invention: a support member is further provided below the sample tray, and the support member is used to provide auxiliary support for the sample tray.

[0022] As a further improvement of the present invention: it also includes a positioning mechanism, which is installed on the drying box body, and the positioning mechanism includes a positioning drive, a floating joint, a positioning shaft, a first sleeve and a second sleeve, the first sleeve and the second sleeve are arranged on the positioning shaft, the positioning drive is connected to the positioning shaft through a floating joint, the positioning drive is used to drive the positioning shaft to move up and down between the first sleeve and the second sleeve, and the positioning shaft is used to cooperate with the positioning ring to realize the correction of the sample plate position and prevent the sample plate from rotating.

[0023] As a further improvement of the present invention: the end portion of the positioning shaft that contacts the positioning ring is a tapered structure, and the inner wall of the positioning ring is provided with a tapered surface that matches the tapered structure.

[0024] As a further improvement of the present invention: it also includes a heat dissipation mechanism, which includes a protective cover, a heat dissipation drive, a fan and a connecting shaft. The heat dissipation drive is installed in the protective cover, and the heat dissipation drive is installed on the connecting plate. One end of the connecting shaft is connected to the heat dissipation drive, and the other end of the connecting shaft passes through the connecting plate and is connected to the fan. The fan is arranged above the sample plate, and the connecting plate and the connecting shaft are sealed by a sealing member.

[0025] As a further improvement of the present invention, it further comprises a temperature measuring mechanism, which is used to detect the internal temperature of the drying box in real time.

[0026] Compared with the prior art, the advantages of the present invention are:

[0027] 1. The fully sealed drying oven of the present invention is provided with a weighing mechanism at the bottom of the drying box body, which includes a driving assembly, a balance assembly, a supporting shaft, a top shaft and a supporting plate. During the sample drying process, the balance assembly is located at the lowest end, at which time the supporting shaft and the top shaft are separated from each other, and the top shaft contacts the sealing sleeve under the action of its own weight to achieve sealing, thereby preventing external air from entering the interior of the drying box body; when the sample is dried, the driving assembly drives the balance assembly to rise to the zeroing position, at which time the supporting shaft contacts the top shaft and pushes the top shaft up, and the top shaft and the sealing sleeve are separated from each other. At this time, the balance assembly is not in contact with the drying box body and the tray, and the balance assembly is reset to zero; then the driving assembly continues to drive the balance assembly to rise, pushing The movable top shaft continues to rise, the supporting plate lifts up the tray, and the balance assembly weighs the tray; after the weighing operation is completed, the driving assembly retracts, the balance assembly, supporting shaft, top shaft and supporting plate descend, the supporting shaft and top shaft separate from each other, and the top shaft contacts the sealing sleeve again to form a seal. The fully sealed drying oven of the utility model realizes that there is no need to take out the sample for weighing during the sample moisture detection, which can effectively prevent the sample from being oxidized during the heating and weighing processes. The top shaft and the supporting shaft adopt a non-fixed connection method, which can prevent the balance assembly from being damaged by excessive tension during the descent of the balance assembly. The extremely small contact area can effectively reduce the heat transferred from the top shaft to the balance assembly, thereby improving the accuracy of the test results.

[0028] 2. In the fully sealed drying oven of the present invention, when in an inert gas atmosphere, the pressure inside the drying box is greater than the external atmospheric pressure. When the top shaft is separated from the sealing sleeve, no air will enter the box. Compared with taking out the material for weighing, the fully sealed drying oven of the present invention can effectively prevent the material from being oxidized by air. By adopting the internal weighing method, the steps of taking out and putting back the material can be reduced, which greatly improves the weighing efficiency. It can be weighed every 5 minutes and compared with the data of the previous 30 minutes to determine whether constant weight is achieved. Compared with taking out the sample for weighing and then weighing after drying for 30 minutes, the inspection drying time is greatly shortened and the detection efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model in a specific embodiment.

[0030] Figure 2 It is a cross-sectional view of the utility model in a specific embodiment.

[0031] Figure 3 It is a cross-sectional view from another perspective of a specific embodiment of the present invention.

[0032] Figure 4 It is a cross-sectional view of the weighing mechanism of the present utility model in a specific embodiment.

[0033] Figure 5 It is a top view of the weighing mechanism of the utility model in a specific embodiment.

[0034] Figure 6 This is a state diagram of the weighing mechanism of the utility model during the sample drying process.

[0035] Figure 7 This is a state diagram of the weighing mechanism of the utility model when it is reset.

[0036] Figure 8 This is a state diagram of the weighing mechanism of the utility model when weighing.

[0037] Figure 9 It is a three-dimensional structural diagram of the turntable mechanism of the present utility model in a specific embodiment.

[0038] Figure 10 It is a cross-sectional view of the turntable mechanism of the present utility model in a specific embodiment.

[0039] Figure 11 yes Figure 10 Enlarged view at point A.

[0040] Figure 12 It is a schematic diagram of the state when the positioning mechanism of the utility model positions the sample plate.

[0041] Figure 13 It is a cross-sectional view of the heat dissipation mechanism of the present utility model in a specific embodiment.

[0042] Legend:

[0043] 1. Drying box; 2. Turntable mechanism; 21. Sample plate; 211. Positioning ring; 212. Pad; 213. Electric heating plate; 22. Sample plate shaft; 23. Rotating drive member; 24. Support column; 3. Heating mechanism; 4. Weighing mechanism; 41. Drive assembly; 411. First cylinder; 412. Connecting bracket; 413. Second cylinder; 414. Fixing plate; 42. Balance assembly; 43. Support shaft; 44. Top shaft; 441. Conical section; 442. Cylindrical section; 45. Support plate; 5. Sealing sleeve; 6. 1. A support; 7. A second support; 8. A sealing ring; 9. A bearing assembly; 10. A thermal insulation pad; 11. A positioning plate; 12. A detection switch; 13. An isolation cover; 14. A support; 15. A positioning mechanism; 151. A positioning drive member; 152. A floating joint; 153. A positioning shaft; 154. A first sleeve; 155. A second sleeve; 16. A heat dissipation mechanism; 161. A protective cover; 162. A heat dissipation drive member; 163. A fan; 164. A connecting shaft; 165. A connecting plate; 166. A sealing member; 17. A temperature measuring mechanism. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] like Figures 1 to 8 As shown, this embodiment discloses a fully sealed oven, including a drying box 1, a turntable mechanism 2 and a heating mechanism 3 are provided in the drying box 1, and a weighing mechanism 4 is further provided under the drying box 1, which is installed under the drying box 1 through a bracket. The weighing mechanism 4 includes a driving assembly 41, a balance assembly 42, a support shaft 43, a top shaft 44 and a supporting plate 45, one end of the support shaft 43 is connected to the balance assembly 42, and the other end of the support shaft 43 is movably connected to the top shaft 44, and the supporting plate 45 is arranged at the top of the top shaft 44, the driving assembly 41 is used to drive the balance assembly 42, the support shaft 43 and the top shaft 44 to move up and down, and a through hole for the top shaft 44 to pass through is opened on the bottom plate of the drying box 1, and a sealing sleeve 5 is provided above the through hole. The top shaft 44 cooperates with the sealing sleeve 5 to achieve sealing of the drying box 1.

[0046] The fully sealed oven in this embodiment is provided with a weighing mechanism 4 below the drying box body 1. The weighing mechanism 4 includes a driving assembly 41, a balance assembly 42, a support shaft 43, a top shaft 44 and a support plate 45. During the sample drying process, the balance assembly 42 is located at the lowest end. At this time, the support shaft 43 and the top shaft 44 are separated from each other. The top shaft 44 contacts the sealing sleeve 5 under the action of its own weight to achieve sealing, preventing external air from entering the interior of the drying box body 1. When the sample is dried, the driving assembly 41 drives the balance assembly 42 to rise to the zero position. At this time, the support shaft 43 is connected to the top shaft 44. The balance assembly 42 is then reset to zero after the driving assembly 41 continues to drive the balance assembly 42 to rise, pushing the top shaft 44 to continue to rise, the supporting plate 45 lifts the tray, and the balance assembly 42 weighs the tray; after the weighing operation is completed, the driving assembly 41 retracts, the balance assembly 42, the supporting shaft 43, the top shaft 44 and the supporting plate 45 descend, the supporting shaft 43 and the top shaft 44 separate from each other, and the top shaft 44 contacts the sealing sleeve 5 again to form a seal. The fully sealed oven of the present invention realizes that there is no need to take out the sample for weighing when testing the moisture content of the sample, which can effectively prevent the sample from being oxidized during the heating and weighing processes. The top shaft 44 and the support shaft 43 adopt a non-fixed connection method, which can also prevent the balance component 42 from being damaged by excessive tension during the descent process. The extremely small contact area can effectively reduce the heat transferred from the top shaft 44 to the balance component 42, thereby improving the accuracy of the test results.

[0047] Furthermore, in a preferred embodiment, the top shaft 44 includes a conical section 441 and a cylindrical section 442, and the inner surface of the sealing sleeve 5 is a conical surface. When the balance assembly 42 is at its lowest point, the support shaft 43 and the top shaft 44 are disengaged, and the top shaft 44 continues to fall under the action of gravity. At this time, the conical section 441 of the top shaft 44 precisely contacts the conical surface of the sealing sleeve 5, i.e., the sealing sleeve 5 prevents the top shaft 44 from continuing to fall, thereby achieving a seal. It should be noted that the top end of the top shaft 44 can also be designed into other shapes such as a semi-sphere, as long as the shape of the inner surface of the sealing sleeve 5 is compatible with the top shaft 44.

[0048] In this embodiment, the driving assembly 41 includes a first cylinder 411, a connecting bracket 412, a second cylinder 413 and a fixing plate 414. The first cylinder 411 is connected to the second cylinder 413 through the connecting bracket 412, and the second cylinder 413 is connected to the balance assembly 42 through the fixing plate 414. During the weighing process, the working process of the driving component 41 is as follows: when the sample needs to be weighed after drying, the second cylinder 413 rises, driving the balance component 42 to rise to the zeroing position, and driving the support shaft 43 to move and push the top shaft 44 to rise, and the top shaft 44 is separated from the sealing sleeve 5. Since the diameter of the cylindrical section 442 of the top shaft 44 is smaller than the inner hole diameter of the sealing sleeve 5, the balance component 42 is not in contact with the drying box 1 and the tray at this time; after zeroing, the second cylinder 413 remains in the rising position, and the first cylinder 411 starts to rise, pushing the support shaft 43 and the top shaft 44 to continue to rise. At this time, the support plate 45 contacts the bottom of the tray, and the balance component 42 weighs the tray; after weighing is completed, the first cylinder 411 and the second cylinder 413 both retreat, and the top shaft 44 contacts the sealing sleeve 5 again to form a seal.

[0049] like Figures 9 to 11 As shown, in this embodiment, the turntable mechanism 2 includes a sample tray 21 for carrying a tray, a vertically arranged sample tray shaft 22, and a rotary drive member 23. The sample tray 21 is vertically connected to the sample tray shaft 22. The rotary drive member 23 drives the sample tray 21 to rotate horizontally via the sample tray shaft 22. A plurality of layout stations are provided along the circumference of the sample tray 21, and each layout station is provided with at least two or more support columns 24. Furthermore, in a preferred embodiment, each layout station is provided with four support columns 24. When the robot places the tray into the layout station, the support columns 24 can realize automatic positioning of the tray.

[0050] In this embodiment, the rotary driving member 23 is installed on the first support 6, and the first support 6 is connected to the bottom wall of the drying box body 1. The drying box body 1 also includes a second support 7, and the second support 7 is sleeved on the sample tray shaft 22. A sealing ring 8 is also provided between the second support 7 and the sample tray shaft 22 for sealing the sample tray shaft 22. It also includes a bearing assembly 9, which is arranged below the drying box body 1 and sleeved on the sample tray shaft 22; an insulation pad 10 is provided between the bearing assembly 9 and the drying box body 1, and the sample tray shaft 22 is connected to the rotary driving member 23 through a coupling.

[0051] In this embodiment, a positioning plate 11 and a detection switch 12 are also included. The positioning plate 11 is set on the sample plate shaft 22, and the detection switch 12 is installed on the first support 6. The positioning plate 11 and the detection switch 12 are used to detect whether the sample plate 21 is rotated to a predetermined position.

[0052] In this embodiment, an isolation cover 13 is provided in the middle of the upper surface of the sample plate 21. Furthermore, in a preferred embodiment, the isolation cover 13 is a conical isolation cover, which can effectively prevent dust from affecting the positioning plate 11 and the detection switch 12, thereby improving the detection accuracy.

[0053] In this embodiment, a cable mounting hole is provided on the sample tray shaft 22, a pad 212 is provided at the bottom of the sample tray 21, and an electric heating plate 213 is provided under the pad 212. The cable can enter the drying box 1 through the cable mounting hole to power the electric heating plate 213. The material can be directly heated by the electric heating plate 213, which speeds up the material heating speed and improves the analysis efficiency.

[0054] like Figure 12 As shown, in this embodiment, a positioning mechanism 15 is further included. The positioning mechanism 15 is installed on the drying box body 1. The positioning mechanism 15 includes a positioning drive 151, a floating joint 152, a positioning shaft 153, a first sliding sleeve 154 and a second sliding sleeve 155. The first sliding sleeve 154 and the second sliding sleeve 155 are sleeved on the positioning shaft 153. The first sliding sleeve 154 and the second sliding sleeve 155 are both arranged in the support. The positioning drive 151 is connected to the positioning shaft 153 through the floating joint 152. The positioning drive 151 is used to drive the positioning shaft 153 to move in a certain direction. The first sliding sleeve 154 and the second sliding sleeve 155 move up and down, and the positioning shaft 153 is used to cooperate with the positioning ring 211 to realize the correction of the position of the sample tray 21 and prevent the sample tray 21 from rotating. A support member 14 is also provided under the sample tray 21. The support member 14 is used to provide auxiliary support for the sample tray 21, which can prevent the positioning shaft 153 from crushing the sample tray 21 during the descent process; further, in a preferred embodiment, the end of the positioning shaft 153 that contacts the positioning ring 211 is a conical structure, and the inner wall of the positioning ring 211 is provided with a conical surface that cooperates with the conical structure.

[0055] In this embodiment, a plurality of positioning rings 211 are further provided on the sample tray 21. The positioning mechanism 15 in this embodiment is mounted on the drying box 1 via a bracket, and the positioning drive 151 is connected to the positioning shaft 153 via a floating joint 152. The sample tray 21 rotates under the drive of the rotary drive 23. The detection switch 12 and the positioning tray 11 initially detect whether the sample tray 21 rotates to a preset position. After determining that the position is in position, the positioning drive 151 extends to push the positioning shaft 153 into the positioning ring 211. The first sliding sleeve 154 and the second sliding sleeve 155 limit the up and down movement of the positioning shaft 153. When the position of the sample tray 21 is mispositioned due to the detection switch 12, the positioning drive 151 is extended to push the positioning shaft 153 into the positioning ring 211. The first sliding sleeve 154 and the second sliding sleeve 155 limit the up and down movement of the positioning shaft 153. When there is a deviation from the normal or other mechanical error, during the descent of the positioning shaft 153, the end of the tapered structure of the positioning shaft 153 contacts the inner wall of the tapered surface of the positioning ring 211 to achieve mechanical correction of the angle of the sample plate 21, thereby improving the accuracy of the sample plate 21 rotating to the preset position, thereby ensuring that the manipulator can accurately take and place samples, the operation is stable and reliable, and not prone to malfunctions; at the same time, it can also ensure that the weighing mechanism 4 is accurately and reliably positioned when weighing the sample plate 21, and the positioning shaft 153 can also prevent the sample plate 21 from rotating due to system errors during the weighing process and damaging the balance assembly 42.

[0056] like Figure 13 As shown, in this embodiment, a heat dissipation mechanism 16 is also included. The heat dissipation mechanism 16 includes a protective cover 161, a heat dissipation driver 162 and a fan 163. The heat dissipation driver 162 is installed in the protective cover 161. The heat dissipation driver 162 is connected to the fan 163 through a connecting shaft 164. The heat dissipation driver 162 is installed on a connecting plate 165. The connecting shaft 164 passes through the connecting plate 165. The fan 163 is arranged above the sample tray 21. The connecting plate 165 and the connecting shaft 164 are sealed by a seal 166. The process of heated blast drying is as follows: after the robot places the tray into the turntable mechanism 2, the door of the drying box 1 is closed, the heating mechanism 3 is energized to heat the gas in the cavity, and the fan 163 drives the gas to flow from the middle to the surrounding side of the drying box 1. The air flow passes through the upper surface of the sample tray 21 and takes out the moisture contained in the material. When the fan 163 is running, the area above the sample tray 21 is at positive pressure and the area below is at negative pressure. The hot and humid gas containing water vapor is discharged through the exhaust pipe of the drying box 1. The air intake flow rate can be adjusted by adjusting the valve. The gas can be air or inert gas.

[0057] This embodiment further includes a temperature measuring mechanism 17 , which is used to detect the internal temperature of the drying box 1 in real time.

[0058] In the fully sealed oven of this embodiment, when in an inert gas atmosphere, the pressure inside the drying box body 1 is greater than the external atmospheric pressure. When the top shaft 44 is separated from the sealing sleeve 5, no air will enter the drying box body 1. Compared with taking out the material for weighing, the fully sealed oven of this embodiment can effectively prevent the material from being oxidized by air. By adopting the internal weighing method, the steps of taking out and putting back the material can be reduced, which greatly improves the weighing efficiency. It can be achieved that weighing is performed every 5 minutes and compared with the data of the previous 30 minutes to determine whether constant weight is achieved. Compared with taking out the sample for weighing and then weighing after drying for 30 minutes, the inspection drying time is greatly shortened and the detection efficiency is improved.

[0059] The above are only preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be pointed out that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A fully sealed drying oven, comprising a drying box (1), characterized in that: The drying box (1) is provided with a turntable mechanism (2) and a heating mechanism (3). A weighing mechanism (4) is further provided below the drying box (1). The weighing mechanism (4) comprises a driving assembly (41), a balance assembly (42), a support shaft (43), a top shaft (44) and a supporting plate (45). One end of the support shaft (43) is connected to the balance assembly (42), and the other end of the support shaft (43) is movably connected to the top shaft (44). The supporting plate (45) is arranged above the top shaft (44). The driving assembly (41) is used to drive the balance assembly (42), the support shaft (43) and the top shaft (44) to move up and down. A through hole for the top shaft (44) to pass through is provided on the bottom plate of the drying box (1). A sealing sleeve (5) is provided above the through hole. The top shaft (44) cooperates with the sealing sleeve (5) to achieve sealing of the drying box (1).

2. The fully sealed oven according to claim 1, characterized in that: The top shaft (44) includes a conical section (441) and a cylindrical section (442).

3. The fully sealed oven according to claim 1, characterized in that: The inner surface of the sealing sleeve (5) is a conical surface.

4. The fully sealed oven according to claim 1, characterized in that: The driving assembly (41) comprises a first cylinder (411), a connecting bracket (412), a second cylinder (413) and a fixing plate (414); the first cylinder (411) is connected to the second cylinder (413) via the connecting bracket (412); and the second cylinder (413) is connected to the balance assembly (42) via the fixing plate (414).

5. The fully sealed oven according to claim 1, characterized in that: The turntable mechanism (2) comprises a sample tray (21) for carrying a tray, a vertically arranged sample tray rotating shaft (22) and a rotary drive member (23), wherein the sample tray (21) is vertically connected to the sample tray rotating shaft (22), and the rotary drive member (23) drives the sample tray (21) to rotate horizontally via the sample tray rotating shaft (22), and a plurality of positioning rings (211) are further provided on the sample tray (21).

6. The fully sealed oven according to claim 5, characterized in that: A plurality of lofting stations are provided on the sample plate (21) along a circumferential direction, and each lofting station is provided with at least two or more support columns (24).

7. The fully sealed oven according to claim 5, characterized in that: The rotary drive member (23) is mounted on a first support (6), and the first support (6) is connected to the lower bottom wall of the drying box (1).

8. The fully sealed oven according to claim 5, characterized in that: The drying box (1) further includes a second support (7), which is sleeved on the sample tray shaft (22). A sealing ring (8) is provided between the second support (7) and the sample tray shaft (22) for sealing the sample tray shaft (22).

9. The fully sealed oven according to claim 5, characterized in that: It also includes a bearing assembly (9), which is arranged below the drying box (1) and sleeved on the sample tray shaft (22).

10. The fully sealed oven according to claim 9, characterized in that: A heat insulating pad (10) is provided between the bearing assembly (9) and the drying box (1).

11. The fully sealed oven according to claim 7, characterized in that: It also includes a positioning disk (11) and a detection switch (12), wherein the positioning disk (11) is arranged on the sample disk rotating shaft (22), and the detection switch (12) is installed on the first support (6), and is used to detect whether the sample disk (21) is rotated to a predetermined position through the positioning disk (11) and the detection switch (12).

12. The fully sealed oven according to claim 5, characterized in that: An isolation cover (13) is provided in the middle of the upper surface of the sample tray (21).

13. The fully sealed oven according to claim 5, characterized in that: A cable mounting hole is provided on the sample plate rotating shaft (22).

14. The fully sealed oven according to claim 5, characterized in that: A pad (212) is provided at the bottom of the sample tray (21), and an electric heating plate (213) is further provided below the pad (212).

15. The fully sealed oven according to claim 5, characterized in that: A support member (14) is further provided below the sample tray (21), and the support member (14) is used to provide auxiliary support for the sample tray (21).

16. The fully sealed oven according to claim 5, characterized in that: The drying box (1) further comprises a positioning mechanism (15), wherein the positioning mechanism (15) is mounted on the drying box (1), and the positioning mechanism (15) comprises a positioning drive member (151), a floating joint (152), a positioning shaft (153), a first sliding sleeve (154), and a second sliding sleeve (155), wherein the first sliding sleeve (154) and the second sliding sleeve (155) are sleeved on the positioning shaft (153), and the positioning drive member (151) is connected to the positioning shaft (153) via the floating joint (152), and the positioning drive member (151) is used to drive the positioning shaft (153) to move up and down between the first sliding sleeve (154) and the second sliding sleeve (155), and the positioning shaft (153) is used to cooperate with the positioning ring (211) to realize the correction of the position of the sample plate (21) and prevent the sample plate (21) from rotating.

17. The fully sealed oven according to claim 16, characterized in that: The end of the positioning shaft (153) that contacts the positioning ring (211) is a conical structure, and the inner wall of the positioning ring (211) is provided with a conical surface that matches the conical structure.

18. The fully sealed oven according to any one of claims 1 to 16, characterized in that: The heat dissipation device further comprises a heat dissipation mechanism (16), wherein the heat dissipation mechanism (16) comprises a protective cover (161), a heat dissipation driving member (162), a fan (163) and a connecting shaft (164), wherein the heat dissipation driving member (162) is installed in the protective cover (161), and the heat dissipation driving member (162) is installed on a connecting plate (165), one end of the connecting shaft (164) is connected to the heat dissipation driving member (162), and the other end of the connecting shaft (164) passes through the connecting plate (165) and is connected to the fan (163), and the fan (163) is arranged above the sample tray (21), and the connecting plate (165) and the connecting shaft (164) are sealed by a sealing member (166).

19. The fully sealed oven according to any one of claims 1 to 16, characterized in that: It also includes a temperature measuring mechanism (17), which is used to detect the internal temperature of the drying box (1) in real time.

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