Double-cone rotary vacuum dryer

Abstract

The utility model discloses a double-cone rotary vacuum drier which comprises a left support, a right support, a controller, a double-cone tank body, a heating mechanism, a driving mechanism, an air inlet mechanism and a feeding mechanism, a left rotating shaft and a right rotating shaft which are of hollow structures are arranged on the two sides of the double-cone tank body, the heating mechanism is arranged on one side of the left rotating shaft, and the driving mechanism comprises a rotating motor and a reduction gearbox. The air inlet mechanism comprises a vacuumizing pipe arranged in an inner cavity of the right rotating shaft, one end of the vacuumizing pipe extends into the double-cone tank, the other end of the vacuumizing pipe is connected with a vacuum pump, an air blowing pipe is arranged in an inner cavity of the vacuumizing pipe, one end of the air blowing pipe penetrates through the vacuumizing pipe to enter the double-cone tank, and the other end of the air blowing pipe penetrates through the vacuumizing pipe to be communicated with an electromagnetic pulse valve. The electromagnetic pulse valve, the gas heater and the compressed gas tank are sequentially communicated, and the rotating motor, the vacuum pump, the electromagnetic pulse valve and the gas heater are electrically connected with the controller; according to the utility model, the nitrogen introduction amount can be saved, and the midway charging efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drying equipment, in particular to a double-cone rotary vacuum dryer. Background Art

[0002] The double-cone vacuum dryer, a conductive heat transfer drying device developed in the early 1980s, operates intermittently under both atmospheric and vacuum conditions. It offers energy-saving and high efficiency, shortens operation time, reduces labor intensity, minimizes losses and contaminants, and produces products of higher purity. A series of double-cone vacuum dryers are currently available, with common volumes of 500L, 1000L, and 1500L. Common materials include stainless steel and enamel. In recent years, this dryer has been widely used in the pharmaceutical, chemical, and food industries.

[0003] For example, the Chinese patent with the announcement number CN220017992U discloses a double-cone rotary vacuum dryer, which includes a body and a container. The container is rotatably connected to the body, the container has a feeding port and a discharging port, the body is provided with a driving member for driving the container to rotate, and a nitrogen pipe for introducing nitrogen is plugged into the container. One end of the nitrogen pipe is connected to the interior of the container. The introduction of nitrogen into the container through the nitrogen pipe can effectively reduce the oxidation of the material to improve the drying efficiency and drying effect. The nitrogen pipe is slidably connected to the container and is provided with an anti-slip member.

[0004] However, this utility model has the following drawbacks: First, while introducing nitrogen into the container can reduce oxidation of the material and remove evaporated water vapor, introducing too much nitrogen does not necessarily translate into a better effect, but rather wastes nitrogen and increases costs. Second, if the container's feed port is opened midway to add material while the container is in a vacuum state, a significant amount of time is required to re-evacuate the container. Therefore, we propose a double-cone rotary vacuum dryer. Summary of the Invention

[0005] The problem to be solved by the utility model is that the double-cone rotary vacuum dryer in the prior art cannot control the amount of nitrogen introduced and the problem that adding materials midway requires time-consuming re-vacuuming.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a double-cone rotary vacuum dryer, which includes a left bracket, a right bracket, a controller, a double-cone tank body, a heating mechanism, a driving mechanism, an air intake mechanism, and a feeding mechanism. A left rotating shaft and a right rotating shaft with a hollow structure are respectively provided on both sides of the double-cone tank body, one end of the left rotating shaft is communicated with the jacket cavity of the double-cone tank body, the top ends of the left bracket and the right bracket are respectively provided with bearing seats, the outer walls of the shafts of the left rotating shaft and the right rotating shaft are respectively rotatably arranged in the inner rings of the two bearing seats, the heating mechanism is arranged on one side of the left rotating shaft, the driving mechanism includes a rotating motor and a reduction gear box arranged on the right bracket, the air intake mechanism includes a vacuum tube arranged in the inner cavity of the right rotating shaft, and one end of the vacuum tube extends to the double-cone tank body. Inside, the other end of the vacuum tube is connected to the vacuum pump, and a blowing pipe is provided in the inner cavity of the vacuum tube, one end of the blowing pipe passes through the tube wall of the vacuum tube and enters the interior of the double-cone tank body, and the other end of the blowing pipe passes through the tube wall of the vacuum tube and is connected with the air outlet of the electromagnetic pulse valve, the air inlet of the electromagnetic pulse valve is connected with the air outlet of the gas heater through the first air inlet pipe, and the air inlet of the gas heater is connected with the air outlet of the compressed gas tank through the second air inlet pipe, the top and bottom of the double-cone tank body are respectively provided with a feed port and a discharge port, and a discharge cover is hinged at the discharge port of the double-cone tank body, and the feeding mechanism is arranged at the feed port of the double-cone tank body, and the rotating motor, vacuum pump, electromagnetic pulse valve and gas heater are respectively electrically connected to the controller arranged on the right bracket.

[0007] As a preferred solution of the double-cone rotary vacuum dryer described in the utility model, wherein: a first gear is provided on the outer wall of the shaft body of the right rotating shaft, the rotating motor is arranged at the bottom of the right bracket, the reduction gear box is arranged in the middle of the right bracket, a second gear is provided at the output shaft end of the rotating motor, a third gear is provided at the power input shaft end of the reduction gear box, a fourth gear is provided at the power output shaft end of the reduction gear box, a first chain is provided between the second gear and the third gear, and a second chain is provided between the fourth gear and the first gear.

[0008] As a preferred solution of the double-cone rotary vacuum dryer described in the utility model, wherein: a first sealing ring and a first bearing are respectively provided in the inner cavity of the right rotating shaft on the side close to the double-cone tank body, the vacuum tube is provided in the first sealing ring, and the vacuum tube and the first bearing are rotatably matched, a vacuum pressure gauge is provided on the tube wall of the vacuum tube on the side close to the vacuum pump, a vacuum filter is provided at one end of the vacuum tube located inside the double-cone tank body, and a plurality of air jet holes are provided on the outer wall of one end of the air blowing pipe located at the double-cone tank body.

[0009] As a preferred solution of the double-cone rotary vacuum dryer described in the present invention, the feeding mechanism includes a feed pipe arranged at the feed port at the top end of the double-cone tank body, a feed cover is hinged at the top end of the feed pipe, a first solenoid valve and a second solenoid valve are spaced apart on one side of the tube wall of the feed pipe, the tube wall of the feed pipe located between the first solenoid valve and the second solenoid valve is connected to a first air extraction pipe, the tube wall of the first air extraction pipe is provided with a first valve, the tube wall of the vacuum tube is connected to a second air extraction pipe, the tube wall of the second air extraction pipe is provided with a second valve, a detachable air pipe is connected between the first air extraction pipe and the second air extraction pipe, and the first solenoid valve and the second solenoid valve are electrically connected to a controller.

[0010] As a preferred embodiment of the double-cone rotary vacuum dryer described in the present invention, the heating mechanism includes a shell, a first water inlet pipe, a second water inlet pipe, a first water return pipe and a second water return pipe. The shell is a cylindrical structure with a hollow interior. The bottom end of the shell is fixed to the top of the left bracket through a mounting seat. The interior of the shell is divided into a water inlet chamber and a water return chamber by a block. The bottom ends of the shell on both sides of the block are respectively connected to the first return pipe and the first water inlet pipe. The second water inlet pipe is arranged inside the water inlet chamber. One end of the second water inlet pipe passes through the shell and is fixedly connected to the end of the left rotating shaft.

[0011] As a preferred solution of the double-cone rotary vacuum dryer described in the utility model, wherein: a second bearing is provided in the water inlet chamber, the second water inlet pipe is rotatably engaged with the second bearing, second sealing rings are respectively provided on the tube walls of the second water inlet pipe on both sides of the second bearing, the second water return pipe is provided in the second water inlet pipe, one end of the second water return pipe extends into the jacket chamber of the double-cone tank body, the other end of the second water return pipe passes through the block and enters the return water chamber, and the second water return pipe and the block are sealed.

[0012] As a preferred solution of the double-cone rotary vacuum dryer described in the utility model, the controller adopts a single-chip microcomputer with model number MPC89L515AP.

[0013] The beneficial effects of the utility model are as follows: the utility model controls the electromagnetic pulse valve through the controller to release the nitrogen in the compressed gas tank into the interior of the double-cone tank body in a pulsed manner, which saves the amount of nitrogen introduced compared to the operation method of directly introducing a large amount of nitrogen, and the nitrogen sprayed in a pulsed manner changes the movement trajectory of the material, and each spray of nitrogen can take away the evaporated water vapor of the material; the utility model can pre-vacuum the material between the first electromagnetic valve and the second electromagnetic valve before adding the material into the double-cone tank body when adding the material in the middle, so as to prevent the need to re-vacuum the entire double-cone tank body after the material is added into the double-cone tank body, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0015] Figure 1 This is an intuitive diagram of a double-cone rotary vacuum dryer.

[0016] Figure 2 This is an internal cross-sectional view of a double-cone tank in a double-cone rotary vacuum dryer.

[0017] Figure 3 for Figure 2 Enlarged schematic diagram of point A in the middle.

[0018] Figure 4 for Figure 2 Enlarged schematic diagram of point B in the middle.

[0019] Figure 5 This is a schematic diagram of the cooperation between the drive mechanism and the right rotating shaft in a double-cone rotary vacuum dryer. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0021] Reference Figures 1 to 5The present embodiment is a double-cone rotary vacuum dryer, comprising a left support 1, a right support 2, a controller 3, a double-cone tank body 100, a heating mechanism 200, a driving mechanism 300, an air intake mechanism 400, and a feeding mechanism 500. A left rotating shaft 101 and a right rotating shaft 102 with a hollow structure are respectively provided on both sides of the double-cone tank body 100. One end of the left rotating shaft 101 is communicated with the jacket cavity 103 of the double-cone tank body 100. The top ends of the left support 1 and the right support 2 are respectively connected to the jacket cavity 103 of the double-cone tank body 100. The left rotating shaft 101 and the right rotating shaft 102 are respectively provided with a bearing seat 4, and the outer wall of the shaft of the left rotating shaft 101 and the right rotating shaft 102 are respectively rotatably provided in the inner ring of the two bearing seats 4. The heating mechanism 200 is provided on one side of the left rotating shaft 101. The driving mechanism 300 includes a rotating motor 301 and a reduction box 302 provided on the right bracket 2. The air intake mechanism 400 includes a vacuum tube 401 provided in the inner cavity of the right rotating shaft 102. One end of the vacuum tube 401 extends to the interior of the double-cone tank body 100, and the vacuum The other end of the empty tube 401 is connected to the vacuum pump, and an air blowing pipe 402 is provided in the inner cavity of the vacuum tube 401. One end of the air blowing pipe 402 passes through the wall of the vacuum tube 401 and enters the interior of the double-cone tank 100. The other end of the air blowing pipe 402 passes through the wall of the vacuum tube 401 and is connected to the air outlet of the electromagnetic pulse valve 403. The air inlet of the electromagnetic pulse valve 403 is connected to the air outlet of the gas heater 404 through the first air inlet pipe 403a. The gas heater 40 4 is connected to the air outlet of the compressed gas tank 405 through the second air inlet pipe 404a. The top and bottom of the double-cone tank body 100 are respectively provided with a feed port and a discharge port. A discharge cover 104 is hinged at the discharge port of the double-cone tank body 100. The feeding mechanism 500 is arranged at the feed port of the double-cone tank body 100. The rotating motor 301, the vacuum pump, the electromagnetic pulse valve 403 and the gas heater 404 are respectively electrically connected to the controller 3 arranged on the right bracket 2.

[0022] The controller 3 controls the opening of the rotating motor 301, the vacuum pump (not shown in the drawings of the specification), the electromagnetic pulse valve 403 and the gas heater 404. The heat medium in the heating mechanism 200 enters the jacket cavity 103 of the double-cone tank body 100 from the inner cavity of the left rotating shaft 101 to heat the material inside the double-cone tank body 100. The rotating motor 301 in the driving mechanism 300 drives the double-cone tank body 100 to rotate, thereby accelerating the drying efficiency of the material inside the double-cone tank body 100. The vacuum pump evacuates the inside of the double-cone tank body 100 through the vacuum pipe 401, so that the inside of the double-cone tank body 100 is in a negative pressure state, and the material The water vapor emitted by absorbing heat can be extracted. The compressed gas tank 405 is opened, and the nitrogen in the compressed gas tank 405 is preheated by the gas heater 404 to facilitate the consistency of the nitrogen and the internal temperature of the double-cone tank body 100, thereby reducing the temperature difference phenomenon. The heated nitrogen is periodically released into the blowing pipe 402 under the control of the electromagnetic pulse valve 403. The nitrogen enters the double-cone tank body 100 from one end of the blowing pipe 402. The nitrogen can be mixed with the water vapor evaporated from the material and extracted by the vacuum pump, thereby further improving the drying rate. When it is necessary to add materials midway, the feeding mechanism 500 at the feeding port of the double-cone tank body 100 is used to add materials.

[0023] In this embodiment, a first gear 303 is provided on the outer wall of the right rotating shaft 102, the rotating motor 301 is arranged at the bottom of the right bracket 2, the reduction gear 302 is arranged in the middle of the right bracket 2, the output shaft end of the rotating motor 301 is provided with a second gear 301a, the power input shaft end of the reduction gear 302 is provided with a third gear 302a, the power output shaft end of the reduction gear 302 is provided with a fourth gear 302b, a first chain 304 is provided between the second gear 301a and the third gear 302a, and a second chain 305 is provided between the fourth gear 302b and the first gear 303.

[0024] Turn on the rotating motor 301, and the rotating motor 301 drives the second gear 301a to rotate. The second gear 301a drives the third gear 302a at the end of the power input shaft in the reduction box 302 to rotate through the first chain 304. When the power output shaft in the reduction box 302 rotates, it drives the fourth gear 302b at the end to rotate. The fourth gear 302b drives the first gear 303 on the outer wall of the right rotating shaft 102 to rotate through the second chain 305, thereby rotating the right rotating shaft 102 and driving the entire double-cone tank body 100 to rotate.

[0025] In this embodiment, a first sealing ring 102a and a first bearing 102b are respectively provided in the inner cavity on the side of the right rotating shaft 102 close to the double-cone tank body 100, the vacuum tube 401 is provided in the first sealing ring 102a, and the vacuum tube 401 rotates with the first bearing 102b, a vacuum pressure gauge 406 is provided on the tube wall on the side of the vacuum tube 401 close to the vacuum pump, a vacuum filter 407 is provided at one end of the vacuum tube 401 located inside the double-cone tank body 100, and a plurality of air injection holes 402a are provided on the outer wall of one end of the air blowing tube 402 located at the double-cone tank body 100.

[0026] The vacuum pump evacuates the interior of the double-cone tank 100 through the vacuum pipe 401. The vacuum filter 407 at one end of the vacuum pipe 401 can prevent the material from being sucked out. Nitrogen is ejected from the multiple jet holes 402a on the blowing pipe 402, adding more injection directions.

[0027] In this embodiment, the feeding mechanism 500 includes a feeding pipe 501 arranged at the feeding port at the top of the double-cone tank body 100, and a feeding cover 502 is hinged at the top of the feeding pipe 501. A first solenoid valve 503 and a second solenoid valve 504 are spaced apart on one side of the tube wall of the feeding pipe 501. The tube wall of the feeding pipe 501 located between the first solenoid valve 503 and the second solenoid valve 504 is connected to a first exhaust pipe 505, and a first valve 505a is provided on the tube wall of the first exhaust pipe 505. The tube wall of the vacuum tube 401 is connected to a second exhaust pipe 408, and a second valve 408a is provided on the tube wall of the second exhaust pipe 408. A detachable air pipe is connected between the first exhaust pipe 505 and the second exhaust pipe 408, and the first solenoid valve 503 and the second solenoid valve 504 are electrically connected to the controller 3.

[0028] When it is necessary to add materials midway, the controller 3 is used to turn off the rotating motor 301 and open the first solenoid valve 503, open the feed cover 502, and after the materials are added to the feed pipe 501, close the feed cover 502 and the first solenoid valve 503, connect the detachable air pipe to the first exhaust pipe 505 and the second exhaust pipe, open the first valve 505a and the second valve 408a on the first exhaust pipe 505 and the second exhaust pipe, and use the vacuum pump to evacuate the space between the first solenoid valve 503 and the second solenoid valve 504. After the vacuuming is completed, close the first valve 505a and the second valve 408a, remove the detachable air pipe, open the second solenoid valve 504, let the materials fall into the double-cone tank body 100, and then close the second solenoid valve 504. Restart the rotating motor 301 to drive the double-cone tank body 100 to rotate.

[0029] In this embodiment, the heating mechanism 200 includes a shell 201, a first water inlet pipe 202, a second water inlet pipe 203, a first water return pipe 204 and a second water return pipe 205. The shell 201 is a cylindrical structure with a hollow interior. The bottom end of the shell 201 is fixed to the top of the left bracket 1 through a mounting seat 206. The interior of the shell 201 is divided into an inlet chamber 201a and a return chamber 201b by a block 207. The bottom ends of the shell 201 on both sides of the block 207 are respectively connected to the first return pipe 204 and the first water inlet pipe 202. The second water inlet pipe 203 is arranged inside the water inlet chamber 201a. One end of the second water inlet pipe 203 passes through the shell 201 and is fixedly connected to the end of the left rotating shaft 101.

[0030] In this embodiment, a second bearing 201c is provided in the water inlet chamber 201a, the second water inlet pipe 203 is rotatably engaged with the second bearing 201c, and the second water inlet pipe 203 is respectively provided with second sealing rings 201d on the tube walls on both sides of the second bearing 201c. The second return water pipe 205 is provided in the second water inlet pipe 203, and one end of the second return water pipe 205 extends into the jacket chamber 103 of the double-conical tank body 100, and the other end of the second return water pipe 205 passes through the block 207 and enters the return water chamber 201b, and the second return water pipe 205 and the block 207 are sealed.

[0031] Hot water is introduced into the first water inlet pipe 202 and enters the water inlet chamber 201a, then enters the jacket chamber 103 of the double-cone tank body 100 along the gap between the second water inlet pipe 203 and the second return water pipe 205 to heat the material, and the hot water is then guided into the return water chamber 201b by the second return water pipe 205 and then flows out through the first return water pipe 204.

[0032] In this embodiment, the controller 3 adopts a single chip microcomputer of model MPC89L515AP.

[0033] Working principle: The controller 3 controls the opening of the rotating motor 301, the vacuum pump, the electromagnetic pulse valve 403 and the gas heater 404. Hot water is introduced into the first water inlet pipe 202 and enters the water inlet chamber 201a. Then, it enters the jacket chamber 103 of the double-cone tank body 100 along the gap between the second water inlet pipe 203 and the second return pipe 205 to heat the material. The hot water is then guided into the return chamber 201b by the second return pipe 205 and flows out from the first return pipe 204. The rotating motor 301 drives the second gear 301a to rotate. The second gear 301a drives the power input shaft in the reduction gear 302 through the first chain 304. The third gear 302a at the end rotates, and the power output shaft in the reduction box 302 rotates, driving the fourth gear 302b at the end to rotate. The fourth gear 302b drives the first gear 303 on the outer wall of the right shaft 102 to rotate through the second chain 305, thereby causing the right shaft 102 to rotate, driving the entire double-cone tank body 100 to rotate, accelerating the drying efficiency of the material inside the double-cone tank body 100, and the vacuum pump vacuums the inside of the double-cone tank body 100 through the vacuum pipe 401, so that the inside of the double-cone tank body 100 is in a negative pressure state, and the water vapor emitted by the material by absorbing heat can be extracted. The compressed gas tank 405 is opened, and the compressed gas tank 405 is opened. The nitrogen in 05 is first preheated by the gas heater 404 to keep the temperature of the nitrogen consistent with that of the inner temperature of the double-cone tank body 100 and reduce the temperature difference. The heated nitrogen is periodically released into the blowing pipe 402 under the control of the electromagnetic pulse valve 403. The nitrogen enters the inner part of the double-cone tank body 100 from one end of the blowing pipe 402. The nitrogen can be mixed with the water vapor evaporated from the material and extracted by the vacuum pump to further improve the drying rate. When it is necessary to add materials midway, the controller 3 is used to turn off the rotating motor 301 and open the first electromagnetic valve 503, open the feed cover 502, and close the feed cover after the materials are added into the feed pipe 501. The feed cover 502 and the first solenoid valve 503 connect the detachable air pipe to the first exhaust pipe 505 and the second exhaust pipe, open the first valve 505a and the second valve 408a on the first exhaust pipe 505 and the second exhaust pipe, and the vacuum pump vacuums the space between the first solenoid valve 503 and the second solenoid valve 504. After the vacuuming is completed, the first valve 505a and the second valve 408a are closed, the detachable air pipe is removed, the second solenoid valve 504 is opened, the material falls into the interior of the double-cone tank body 100, and then the second solenoid valve 504 is closed, and the rotating motor 301 is restarted to drive the double-cone tank body 100 to rotate.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A double-cone rotary vacuum dryer, characterized in that: The invention comprises a left bracket (1), a right bracket (2), a controller (3), a double-cone tank body (100), a heating mechanism (200), a driving mechanism (300), an air intake mechanism (400), and a feeding mechanism (500), wherein a left rotating shaft (101) and a right rotating shaft (102) with a hollow structure are respectively provided on both sides of the double-cone tank body (100), one end of the left rotating shaft (101) is communicated with a jacket cavity (103) of the double-cone tank body (100), and a bearing seat (4) is respectively provided at the top end of the left bracket (1) and the right bracket (2). The outer walls of the shafts (101) and the right shaft (102) are respectively rotatably arranged in the inner rings of the two bearing seats (4); the heating mechanism (200) is arranged on one side of the left shaft (101); the driving mechanism (300) includes a rotating motor (301) and a reduction box (302) arranged on the right bracket (2); the air intake mechanism (400) includes a vacuum tube (401) arranged in the inner cavity of the right shaft (102); one end of the vacuum tube (401) extends to the inside of the double-cone tank (100); the vacuum tube (401) is provided with a plurality of holes; and the vacuum tube (401) is provided with a plurality of holes. The other end of the vacuum pump (401) is connected to the vacuum pump, and a blowpipe (402) is provided in the inner cavity of the vacuum pump (401). One end of the blowpipe (402) passes through the wall of the vacuum pump (401) and enters the interior of the double-cone tank (100). The other end of the blowpipe (402) passes through the wall of the vacuum pump (401) and is communicated with the air outlet of the electromagnetic pulse valve (403). The air inlet of the electromagnetic pulse valve (403) is communicated with the air outlet of the gas heater (404) through the first air inlet pipe (403a). The gas heater (404 ) is connected to the air outlet of the compressed gas tank (405) through a second air inlet pipe (404a), the top and bottom of the double-cone tank body (100) are respectively provided with a feed port and a discharge port, the discharge port of the double-cone tank body (100) is hinged with a discharge cover (104), the feeding mechanism (500) is arranged at the feed port of the double-cone tank body (100), and the rotating motor (301), vacuum pump, electromagnetic pulse valve (403) and gas heater (404) are respectively electrically connected to the controller (3) arranged on the right bracket (2).

2. A double-cone rotary vacuum dryer according to claim 1, characterized in that: A first gear (303) is provided on the outer wall of the shaft of the right rotating shaft (102), the rotating motor (301) is arranged at the bottom of the right bracket (2), the reduction box (302) is arranged in the middle of the right bracket (2), a second gear (301a) is provided at the output shaft end of the rotating motor (301), a third gear (302a) is provided at the power input shaft end of the reduction box (302), a fourth gear (302b) is provided at the power output shaft end of the reduction box (302), a first chain (304) is provided between the second gear (301a) and the third gear (302a), and a second chain (305) is provided between the fourth gear (302b) and the first gear (303).

3. A double-cone rotary vacuum dryer according to claim 1, characterized in that: A first sealing ring (102a) and a first bearing (102b) are respectively provided in the inner cavity of the right rotating shaft (102) on one side close to the double-cone tank body (100); the vacuum pumping tube (401) is provided in the first sealing ring (102a), and the vacuum pumping tube (401) and the first bearing (102b) are rotatably matched; a vacuum pressure gauge (406) is provided on the tube wall of the vacuum pump on one side of the vacuum pump; a vacuum filter (407) is provided at one end of the vacuum pumping tube (401) located inside the double-cone tank body (100); and a plurality of air injection holes (402a) are provided on the outer wall of one end of the air blowing tube (402) located at the double-cone tank body (100).

4. A double-cone rotary vacuum dryer according to claim 1, characterized in that: The feeding mechanism (500) includes a feeding pipe (501) arranged at the feeding port at the top end of the double-cone tank body (100), a feeding cover (502) is hingedly connected to the top end of the feeding pipe (501), a first solenoid valve (503) and a second solenoid valve (504) are arranged at intervals on one side of the tube wall of the feeding pipe (501), the tube wall of the feeding pipe (501) located between the first solenoid valve (503) and the second solenoid valve (504) is connected to a first exhaust pipe (505), the tube wall of the first exhaust pipe (505) is provided with a first valve (505a), the tube wall of the vacuum tube (401) is connected to a second exhaust pipe (408), the tube wall of the second exhaust pipe (408) is provided with a second valve (408a), a detachable air pipe is connected between the first exhaust pipe (505) and the second exhaust pipe (408), and the first solenoid valve (503) and the second solenoid valve (504) are electrically connected to the controller (3).

5. The double-cone rotary vacuum dryer according to claim 1, characterized in that: The heating mechanism (200) comprises a shell (201), a first water inlet pipe (202), a second water inlet pipe (203), a first water return pipe (204) and a second water return pipe (205); the shell (201) is a cylindrical structure with a hollow interior; the bottom end of the shell (201) is fixed to the top end of the left bracket (1) via a mounting seat (206); the interior of the shell (201) is divided into a water inlet chamber (201a) and a water return chamber (201b) by a stopper (207); the bottom ends of the shell (201) located on both sides of the stopper (207) are respectively connected to the first water return pipe (204) and the first water inlet pipe (202); the second water inlet pipe (203) is arranged inside the water inlet chamber (201a); one end of the second water inlet pipe (203) passes through the shell (201) and is fixedly connected to the end of the left rotating shaft (101).

6. A double-cone rotary vacuum dryer according to claim 5, characterized in that: A second bearing (201c) is provided in the water inlet cavity (201a), the second water inlet pipe (203) is rotatably engaged with the second bearing (201c), and second sealing rings (201d) are respectively provided on the pipe walls of the second water inlet pipe (203) on both sides of the second bearing (201c). The second water return pipe (205) is provided in the second water inlet pipe (203), one end of the second water return pipe (205) extends into the jacket cavity (103) of the double-cone tank body (100), and the other end of the second water return pipe (205) passes through the block (207) and enters the water return cavity (201b), and the second water return pipe (205) and the block (207) are sealed.

7. The double-cone rotary vacuum dryer according to claim 1, characterized in that: The controller (3) adopts a single chip microcomputer of model MPC89L515AP.

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