Novel double-cone rotary vacuum drying device

Abstract

The utility model relates to the technical field of drying machines, in particular to a novel double-cone rotary vacuum drying device which comprises a machine frame. A double-cone cylinder; a heat source assembly; the sleeve is connected with the double-cone cylinder body; the driving assembly is connected with the sleeve; the vacuum assembly comprises a vacuum tube, the vacuum tube is sleeved with the sleeve, and the vacuum tube penetrates through the sleeve and then horizontally extends into the double-cone barrel; the isolation protection cover is horizontally arranged in the double-cone cylinder and connected with one end of the vacuum tube extending into the double-cone cylinder, and the central axis of the vacuum tube is located below the central axis of the isolation protection cover; the vacuum tube is sleeved outside the temperature measuring device, the temperature measuring device extends into the isolation protection cover, through the arrangement, the real-time temperature under the drying working condition can be accurately measured, and the working efficiency and the drying effect are effectively improved.

Description

Technical Field

[0001] The utility model relates to a novel double-cone rotary vacuum drying device, belonging to the technical field of dryers. Background Art

[0002] The double-cone rotary vacuum dryer, as a vacuum drying equipment, is mainly used for the mixed drying of powdery, granular and crystalline materials in industries such as food, chemical industry and medicine. In the existing double-cone rotary dryer, the main structures inside the drying container are the layout of the filter screen and the temperature measurement points; in the actual use process, there are still problems to be solved. First of all, because the installation angle of the filter screen is tilted upward at 45° with the horizontal plane, during the vacuum drying process, the temperature measurement point is included in the vacuum pipeline and is far from the material, so the actual temperature of the material cannot be accurately measured, and the deviation is large. And it is set in the vacuum pipeline, and it is easy to have the problem that the temperature measurement point contacts or collides with the pipe wall and is damaged, resulting in temperature measurement errors and intermittent problems of too high temperature measurement, leading to over-drying, wasting raw materials and increasing the production and operation costs; Therefore, it is of great practical significance to study a novel double-cone rotary vacuum drying device. Content of the Utility Model

[0003] Aiming at the deficiencies existing in the prior art, the utility model provides a novel double-cone rotary vacuum drying device.

[0004] The technical solution of the utility model to solve the above technical problems is as follows: A novel double-cone rotary vacuum drying device, comprising: a frame; a double-cone cylinder, the double-cone cylinder is rotatably arranged on the frame, a hollow cavity is arranged inside the double-cone cylinder, and its side wall is of a double-layer jacket structure. One end of the double-cone cylinder is provided with a feed inlet, and the other end is provided with a discharge outlet; a heat source assembly, the heat source assembly includes an inlet pipe and an outlet pipe communicated with the double-layer jacket of the double-cone cylinder, and a heat storage device for supplying heat; a sleeve, the sleeve is a hollow tubular structure with one end connected to the double-cone cylinder; a driving assembly, the driving assembly is connected to the sleeve and is used to drive the double-cone cylinder to rotate; a vacuum assembly, the vacuum assembly includes a vacuum pipe, the sleeve is sleeved outside the vacuum pipe, one end of the vacuum pipe is connected to a vacuum pumping system, and the other end sequentially passes through the sleeve and the side wall of the double-cone cylinder and then horizontally extends into the inside of the double-cone cylinder; an isolation protection cover, the isolation protection cover is horizontally arranged inside the double-cone cylinder and is connected to one end of the vacuum pipe extending into the inside of the double-cone cylinder. The central axis of the vacuum pipe is located below the central axis of the isolation protection cover, and regular round holes are arranged on the isolation protection cover; a temperature measuring device, the temperature measuring device is of a straight rod structure, one end of which is provided with a probe, and the other end is connected with a temperature indicator. The vacuum pipe is sleeved outside the temperature measuring device, and the end of the temperature measuring device provided with the probe passes through the vacuum pipe and extends into the isolation protection cover.

[0005] Furthermore, the center point of the isolation protection cover coincides with the vertical center line of the double-cone cylinder.

[0006] Furthermore, the sleeve, the vacuum tube, and the temperature measuring device are coaxially arranged.

[0007] Furthermore, the minimum inner diameter L1 at the feeding port end of the double-cone cylinder is greater than the minimum inner diameter L2 at the discharging port end of the double-cone cylinder, and the vertical distance from the plane where the minimum inner diameter at the feeding port end of the double-cone cylinder is located to the central axis of the vacuum tube is less than the vertical distance from the plane where the minimum inner diameter at the discharging port end of the double-cone cylinder is located to the central axis of the vacuum tube.

[0008] Furthermore, the relationship among the height H1 of the double-cone cylinder, the width H2 of the double-cone cylinder, and the length L3 of the isolation protection cover satisfies H1:H2:L3=(6.0 - 7.0):(4.2 - 4.7):1.

[0009] Furthermore, the cross-section of the isolation protection cover is an ellipse longitudinally extending along the vertical center line of the double-cone cylinder.

[0010] Furthermore, the height H3 of the isolation protection cover is 1.5 - 1.75 times the maximum width H4 of the isolation protection cover.

[0011] Furthermore, the diameter of the round hole above the plane where the maximum width of the isolation protection cover is located is smaller than the diameter of the round hole below the plane where the maximum width of the isolation protection cover is located.

[0012] Furthermore, the relationship among the height H3 of the isolation protection cover, the inner diameter D1 of the vacuum tube, and the diameter D2 of the temperature measuring device satisfies H3:D1:D2=(6.0 - 7.0):(2.7 - 3.0):1.

[0013] Furthermore, the drive assembly includes a motor arranged on the frame, a reducer connected to the motor, and a pulley arranged on the outer periphery of the sleeve, and the reducer is connected to the pulley through a belt.

[0014] The beneficial effects of the present utility model are:

[0015] (1) By arranging the probe of the temperature measuring device to extend into the isolation protection cover, on the premise of ensuring that the probe does not contact the material to be dried, the distance between the probe and the material to be dried becomes closer, the real-time temperature under the drying condition can be accurately measured, and the problem that the probe contacts the side wall of the vacuum tube, resulting in temperature measurement errors and intermittently high temperature measurement, can be avoided, effectively improving the working efficiency and drying effect;

[0016] (2) By setting the probe of the temperature measuring device to extend into the isolation protection cover, the usage condition of the probe can be visually inspected at this position, avoiding the problem that continuous heating affects the drying effect due to temperature measurement errors caused by probe damage;

[0017] (3) By setting the layout of the isolation protection cover and the vacuum tube, on the premise of meeting the requirements of the loading capacity and ventilation volume, the function of preventing material caking can be realized. And through the above layout, the probe can also be kept away from the top of the isolation protection cover, avoiding the problem that the top of the isolation protection cover contacts the material to be dried for a long time, causing its temperature to change and thus affecting the accuracy of the temperature measuring device, and further improving the working efficiency and drying effect. Description of the Drawings

[0018] Figure 1 Structural schematic diagram of the double-cone rotary vacuum drying device provided by the embodiment of the present invention;

[0019] Figure 2 Front view of the isolation protection cover and the vacuum tube provided by the embodiment of the present invention;

[0020] Figure 3 Front view of the double-cone cylinder provided by the embodiment of the present invention;

[0021] Figure 4 Cross-sectional view of the isolation protection cover provided by the embodiment of the present invention;

[0022] Figure 5 Schematic diagram of the installation positions of the sleeve, the vacuum tube and the temperature measuring device provided by the embodiment of the present invention.

[0023] Reference numerals: 1, frame; 2, double-cone cylinder; 21, feed inlet; 22, discharge outlet; 3, inlet pipe; 4, outlet pipe; 5, heat storage device; 6, sleeve; 7, vacuum tube; 8, vacuum pumping system; 9, isolation protection cover; 10, temperature measuring device; 101, probe; 102, temperature indicator; 11, motor; 12, reducer; 13, belt pulley; 14, belt; 15, sealing ring. Detailed Embodiment

[0024] The following makes a detailed description of the specific embodiments of the present invention. The present invention can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. The terms used are only for describing the specific embodiments and do not limit the present invention.

[0026] As Figure 1 and Figure 2 shown, the present utility model provides a novel double-cone rotary vacuum drying device, including a frame 1 which plays a supporting role; a double-cone cylinder 2 which is rotatably arranged on the frame 1 through bearings. The double-cone cylinder 2 is formed by inverting two conical hollow structures, and its interior is provided with a hollow cavity for drying work. The side wall of the double-cone cylinder 2 is a double-layer jacket structure. One end of the double-cone cylinder 2 is provided with a feed port 21, and the other end is provided with a discharge port 22. End caps for sealing are arranged on the feed port 21 and the discharge port 22; a heat source assembly which includes an inlet pipe 3 and an outlet pipe 4 communicated with the double-layer jacket of the double-cone cylinder 2, and a heat storage device 5 for supplying heat source. The heat source circulates in the double-layer jacket of the double-cone cylinder 2 to transfer heat to the double-cone cylinder 2. The heat source can be hot water, hot oil or other substances capable of flowing and exchanging heat; a sleeve 6 which is a hollow tubular structure with one end connected to the double-cone cylinder 2, and the sleeve 6 is fixed by a bearing seat arranged on the frame 1; a driving assembly which is connected to the sleeve 6 and is used to drive the double-cone cylinder 2 to rotate. The driving assembly includes a motor 11 detachably arranged on the frame 1, and a speed reducer 12 connected to the motor 11. It further includes a belt pulley 13 arranged on the outer periphery of the sleeve 6, and the speed reducer 12 is connected to the belt pulley 13 through a belt 14; a vacuum assembly which includes a vacuum pipe 7. The sleeve 6 is sleeved outside the vacuum pipe 7. One end of the vacuum pipe 7 is connected to a vacuum pumping system 8, and the other end of the vacuum pipe 7 sequentially passes through the sleeve 6 and the side wall of the double-cone cylinder 2 and then horizontally extends into the interior of the double-cone cylinder 2; an isolation protection cover 9 which is horizontally arranged inside the double-cone cylinder 2 and is connected to one end of the vacuum pipe 7 extending into the interior of the double-cone cylinder 2. It should be noted that the above-mentioned "horizontal" is parallel to the horizontal center line of the double-cone cylinder 2. The central axis X1 of the vacuum pipe 7 is located below the central axis X2 of the isolation protection cover 9. It can also be understood that the vacuum pipe 7 is connected to the lower side end of the isolation protection cover 9. Regularly arranged round holes are arranged on the isolation protection cover 9; a temperature measuring device 10 which is a straight rod structure. One end of it is provided with a probe 101, and the other end is connected to a temperature indicator 102. The vacuum pipe 7 is sleeved outside the temperature measuring device 10. A sealing ring 15 is arranged between the vacuum pipe 7 and the temperature measuring device 10. The end of the temperature measuring device 10 provided with the probe 101 passes through the vacuum pipe 7 and extends into the isolation protection cover 9.

[0027] With the above settings, first, the probe 101 of the temperature measuring device 10 extends into the isolation protection cover 9. On the premise of ensuring that the probe 101 does not contact the material to be dried, the distance between the probe 101 and the material to be dried becomes closer, enabling accurate measurement of the real-time temperature under the drying condition, and avoiding the problem that the probe 101 contacts the side wall of the vacuum tube 7, resulting in temperature measurement errors and intermittently high temperature measurements, effectively improving the work efficiency and drying effect. Secondly, the usage condition of the probe 101 can be visually inspected at this position, avoiding the problem that continuous heating affects the drying effect due to temperature measurement errors caused by damage to the probe 101. Finally, by setting the position layout of the isolation protection cover 9 and the vacuum tube 7, on the premise of meeting the requirements of the loading capacity and ventilation volume, when the material to be dried rotates with the double-cone cylinder 2 to the high point and then falls, the material to be dried collides with the top of the isolation protection cover 9, achieving the effect of preventing material caking. And through the above position layout, the probe 101 can also be kept away from the top of the isolation protection cover 9, avoiding the problem that the top of the isolation protection cover 9 contacts the material to be dried for a long time, causing its temperature to change and affecting the accuracy of the temperature measuring device 10, further improving the work efficiency and drying effect.

[0028] Specifically, the center point of the isolation protection cover 9 coincides with the vertical center line X3 of the double-cone cylinder 2. It should be noted that the center point of the isolation protection cover 9 is the intersection of its central axis X2 and its vertical center line. Through this setting, the best anti-caking effect can be achieved, and the temperature measurement error is small and the accuracy is high.

[0029] Specifically, the sleeve 6, the vacuum tube 7, and the temperature measuring device 10 are coaxially arranged. Through the above setting, first, it is ensured that during the rotation of the double-cone cylinder 2, the axes of the three coincide, and there will be no phenomenon of the axis drawing a circle, maximizing the loading capacity of the material to be dried. It is ensured that during the drying process, the material to be dried does not directly contact the bottom of the isolation protection cover 9, resulting in local temperature changes at the bottom and affecting the temperature measurement accuracy. And because the isolation protection cover 9 collides with the material to be dried, it will cause the isolation protection cover 9 and the vacuum tube 7 to shake slightly. Through the coaxial arrangement, it can be avoided that the temperature measuring device 10 collides with the inner wall of the isolation protection cover 9 or the inner wall of the vacuum tube 7 and is damaged, prolonging the service life of the temperature measuring device 10 and reducing the production and operation costs.

[0030] Specifically, as Figure 3As shown, the minimum inner diameter L1 at one end of the feed inlet 21 of the double-cone cylinder body 2 is greater than the minimum inner diameter L2 at one end of the discharge outlet 22 of the double-cone cylinder body 2, and the vertical distance from the plane where the minimum inner diameter at one end of the feed inlet 21 of the double-cone cylinder body 2 is located to the central axis of the vacuum tube 7 is less than the vertical distance from the plane where the minimum inner diameter at one end of the discharge outlet 22 of the double-cone cylinder body 2 is located to the central axis of the vacuum tube 7. Through the above settings, the material can be more evenly heated during the drying process, thereby improving the drying efficiency. The smaller inner diameter of the discharge outlet 22, the larger inner diameter of the feed inlet 21, and the different vertical distances from the central axis of the vacuum tube 7 not only help the material to be dried to form better flow and mixing during the drying process, but also contribute to a clean and thorough discharge process, further promoting uniform drying.

[0031] Specifically, as Figure 2 and Figure 3 shown, the relationship among the height H1 of the double-cone cylinder body 2, the width H2 of the double-cone cylinder body 2, and the length L3 of the isolation protection cover 9 satisfies H1:H2:L3 = (6.0 - 7.0):(4.2 - 5.2):1; by limiting the above relationship in the present invention, its function is to further coordinate the stability of the drying process system. If the width H2 of the double-cone cylinder body 2 is less than 4.2 times the length L3 of the isolation protection cover 9, at this time the double-cone cylinder body 2 is too narrow, which not only reduces the loading capacity of the material to be dried and lowers the working efficiency, but also if the width H2 is greater than 5.2 times the length L3, although the loading capacity increases, with the increase of the width, during the rotation of the double-cone cylinder body 2, the connection between the double-cone cylinder body 2 and the frame 1 is subjected to greater force and is prone to vibration, abnormal noise or damage, resulting in a shortened service life; on the premise that the width H2 of the double-cone cylinder body 2 is determined, by limiting the height H1 of the isolation protection cover 9 to be 6.0 - 7.0 times the length L3 of the isolation protection cover 9, the stability of the drying process system can be further improved, the service life of the overall system can be extended, and it is beneficial to further improve the drying efficiency.

[0032] Specifically, as Figure 4As shown, the cross-section of the isolation protective cover 9 is an ellipse longitudinally extending along the vertical center line of the double-cone cylinder 2. The above setting is very crucial and has multiple functions. First, on the premise of retaining the anti-caking function, by setting it as a smooth ellipse, when the material to be dried collides with the isolation protective cover 9 and comes into contact, it can slide down along the side wall of the isolation protective cover 9, avoiding the problem that the residual material on the upper part of the isolation protective cover 9 affects the vacuum pumping. Second, by setting it as a smooth ellipse, during the rotation and turning process or during the process of the material to be dried colliding with the isolation protective cover 9 and then sliding down, the material to be dried will not come into contact with the lower part of the isolation protective cover 9, which can further prevent the problem that the isolation protective cover 9 is blocked and affects the vacuum pumping, and also avoids the problem that the lower part of the isolation protective cover 9 comes into contact with the material to be dried and causes its temperature change, thereby affecting the accuracy of the temperature measuring device 10. Through the above settings, the working efficiency and drying effect can be further improved. It should be noted that the "upper part" refers to the part above the plane where the maximum width of the isolation protective cover 9 is located, and the "lower part" refers to the part below the plane where the maximum width of the isolation protective cover 9 is located.

[0033] Specifically, as Figure 4 shown, the height H3 of the isolation protective cover 9 is 1.5 - 1.75 times the maximum width H4 of the isolation protective cover 9. If the height H3 is less than 1.5 times the width H4, at this time, the ventilation volume of the isolation protective cover 9 is reduced, which is not conducive to timely exhausting the water vapor generated by the material to be dried through vacuum pumping, and if the height is too low, it will also reduce the temperature measurement accuracy. If the height H3 is greater than 1.75 times the width H4, at this time, the height is too large. Although it can ensure sufficient ventilation volume and temperature measurement accuracy, the stress at the connection between the isolation protective cover 9 and the vacuum tube 7 becomes larger, increasing the probability of damage and shortening the service life.

[0034] Specifically, as Figure 2 shown, the diameter of the round hole in the upper part of the plane where the maximum width of the isolation protective cover 9 is located is smaller than the diameter of the round hole in the lower part of the plane where the maximum width of the isolation protective cover 9 is located. Through the above settings, it can further ensure that the upper part of the isolation protective cover 9 is not blocked, and on the premise of not being blocked, it can ensure sufficient ventilation volume to ensure that the working efficiency and drying effect meet the process requirements.

[0035] Specifically, as Figure 2 、 Figure 4 、 Figure 5As shown, the relationship among the height H3 of the isolation protection cover 9, the inner diameter D1 of the vacuum tube 7, and the diameter D2 of the temperature measuring device 10 satisfies H3:D1:D2 = (6.0 - 7.0):(2.7 - 3.0):1. By defining the above dimensional relationship, its function is to coordinate the temperature measurement and drainage effect during the drying process. On the premise of ensuring sufficient ventilation volume, system service life, and anti-caking function, by defining the above dimensional relationship, the system stability during the drying process can be further ensured, and the temperature measuring device 10 can be further prevented from being damaged due to collision with the inner wall of the isolation protection cover 9 or the inner wall of the vacuum tube 7.

[0036] Specific implementation process: During the drying operation, first fill the material to be dried through the feed port 21, then connect the heat source assembly and the vacuum assembly to heat and evacuate the double-cone cylinder 2 respectively. Next, start the drive assembly to drive the double-cone cylinder 2 to rotate, and dry the material to be dried by rotating and turning it. During the drying process, at any time, compare the feedback drying temperature with the process requirements, and timely control the drying process by adjusting the heat source assembly and the vacuum assembly. When the drying is completed, pour out the dried material through the discharge port 22.

[0037] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, all possible combinations of the various technical features in the above embodiments are not exhaustively listed. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0038] For those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. The protection scope of the present invention is subject to the appended claims.

Claims

1. A novel double-cone rotary vacuum drying device, characterized in that, Comprising: Frame; Double-cone cylinder body, the double-cone cylinder body is rotatably arranged on the frame, a hollow cavity is arranged inside the double-cone cylinder body, its side wall is a double-layer jacket structure, a feed inlet is arranged at one end of the double-cone cylinder body, and a discharge outlet is arranged at the other end; Heat source assembly, the heat source assembly includes an inlet pipe and an outlet pipe communicated with the double-layer jacket of the double-cone cylinder body, and a heat storage device for supplying heat source; Sleeve, the sleeve is a hollow tubular structure with one end connected to the double-cone cylinder body; Drive assembly, the drive assembly is connected to the sleeve and is used to drive the double-cone cylinder body to rotate; Vacuum assembly, the vacuum assembly includes a vacuum pipe, the sleeve is sleeved outside the vacuum pipe, one end of the vacuum pipe is connected to a vacuum pumping system, and the other end sequentially passes through the sleeve and the side wall of the double-cone cylinder body and then horizontally extends into the inside of the double-cone cylinder body; Isolation protection cover, the isolation protection cover is horizontally arranged inside the double-cone cylinder body and is connected to one end of the vacuum pipe extending into the inside of the double-cone cylinder body, the central axis of the vacuum pipe is located below the central axis of the isolation protection cover, and regular arranged round holes are arranged on the isolation protection cover; Temperature measuring device, the temperature measuring device is a straight rod structure, a probe is arranged at one end thereof, a temperature indicator is connected to the other end, the vacuum pipe is sleeved outside the temperature measuring device, and the end of the temperature measuring device provided with the probe passes through the vacuum pipe and extends into the isolation protection cover; 2. A novel double-cone rotary vacuum drying device according to claim 1, characterized in that, The center point of the isolation protection cover coincides with the vertical center line of the double-cone cylinder body.

3. A novel double-cone rotary vacuum drying device according to claim 1, characterized in that, The sleeve, the vacuum pipe and the temperature measuring device are coaxially arranged.

4. A novel double-cone rotary vacuum drying device according to claim 2, characterized in that, The minimum inner diameter L1 at the feed inlet end of the double-cone cylinder body is greater than the minimum inner diameter L2 at the discharge outlet end of the double-cone cylinder body, and the vertical distance from the plane where the minimum inner diameter at the feed inlet end of the double-cone cylinder body is located to the central axis of the vacuum pipe is less than the vertical distance from the plane where the minimum inner diameter at the discharge outlet end of the double-cone cylinder body is located to the central axis of the vacuum pipe.

5. A novel double-cone rotary vacuum drying device according to claim 4, characterized in that, The relationship among the height H1 of the double-cone cylinder body, the width H2 of the double-cone cylinder body and the length L3 of the isolation protection cover satisfies H1:H2:L3=(6.0 - 7.0):(4.2 - 4.7):

1.

6. A novel double-cone rotary vacuum drying device according to claim 2, characterized in that, The cross-section of the isolation protection cover is an ellipse longitudinally extending along the vertical center line of the double-cone cylinder body.

7. A novel double-cone rotary vacuum drying device according to claim 6, characterized in that, The height H3 of the isolation protection cover is 1.5 - 1.75 times the maximum width H4 of the isolation protection cover.

8. A novel double-cone rotary vacuum drying device according to claim 5, characterized in that, The diameter of the round hole in the upper part of the plane where the maximum width of the isolation protection cover is located is smaller than the diameter of the round hole in the lower part of the plane where the maximum width of the isolation protection cover is located.

9. A novel double-cone rotary vacuum drying device according to claim 1, characterized in that, The relationship among the height H3 of the isolation protection cover, the inner diameter D1 of the vacuum pipe and the diameter D2 of the temperature measuring device satisfies H3:D1:D2=(6.0 - 7.0):(2.7 - 3.0):

1.

10. A novel double-cone rotary vacuum drying device according to claim 1, characterized in that, The drive assembly includes a motor arranged on the frame, a reducer connected to the motor, and a pulley arranged on the outer periphery of the sleeve, and the reducer is connected to the pulley through a belt.

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