Double-cone vacuum dryer

Abstract

The utility model belongs to the technical field of material drying, and particularly relates to a double-cone vacuum drying machine which comprises a machine base, a rotating cone is installed on the machine base, a vacuum suction head is installed in the cone and used for vacuumizing the interior of the cone, and static sealing is adopted between the vacuum suction head and the cone. Static sealing is adopted between the vacuum suction head and the cone, the sealing performance of the connecting position is effectively guaranteed, relative rotation does not exist at the connecting position, mutual friction does not exist, abrasion to a coating on the surface of the vacuum suction head is reduced, and the situation that coating chippings are doped into materials, and uncontrollable influences are caused to the quality of the materials is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of material drying, and in particular relates to a double-cone vacuum drying machine. Background Art

[0002] Double cone vacuum dryer is a device used for drying materials. The double cone is in a vacuum state. The heating medium is introduced into the jacket on the surface of the cone for heating. The heat contacts the wet material through the inner wall of the cone. After the wet material absorbs heat, the water vapor it carries evaporates and is pumped away through the vacuum exhaust pipe by the vacuum pump. Since the tank is in a vacuum state and the rotation of the tank makes the material constantly flip up and down and inside and outside, the drying speed of the material is accelerated, the drying efficiency is improved, and the purpose of uniform drying is achieved;

[0003] In a traditional double-cone vacuum dryer, a dynamic seal is used between the vacuum tube and the cone. For example, in a double-cone dryer disclosed in Chinese patent application No. (CN201410506378.9), when a dynamic seal is used between the vacuum tube and the cone, friction occurs between the cone and the surface of the vacuum tube during rotation. In order to prevent the vacuum tube from being corroded by some materials, a corrosion-resistant coating is usually applied on the surface. However, the friction between the cone and the surface of the vacuum tube will cause wear of the coating, which will not only erode the vacuum tube and shorten its service life, but also cause the worn-off coating debris to be mixed in the material, affecting the quality of the material. This needs to be improved. Utility Model Content

[0004] The utility model aims to solve the above-mentioned technical problems and provides a double-cone vacuum dryer, which can avoid the relative friction between the cone and the vacuum tube caused by relative rotation.

[0005] In view of this, the utility model provides a double-cone vacuum dryer, comprising:

[0006] A machine base, on which a rotating cone is mounted;

[0007] A vacuum suction head is installed in the cone and is used for vacuuming the cone;

[0008] Wherein, static sealing is adopted between the air extraction device and the cone.

[0009] In the above technical solution, further, it also includes:

[0010] A vacuum tube, one end of which is located inside the cone and connected to the vacuum head, and the other end of which extends to the outside of the cone and is connected to a vacuum pump;

[0011] The support shaft is installed at both ends of the cone and connected to the machine base through a bearing seat;

[0012] Sealing assembly, including a static seal installed between the vacuum tube and the cone and a dynamic seal installed between the vacuum tube and the vacuum pump

[0013] The vacuum tube coaxially passes through a support shaft located at one end of the cone.

[0014] In the above technical solution, further:

[0015] The static sealing component comprises a sealing ring and an abutting block for abutting the sealing ring, and the abutting block is sleeved on the surface of the vacuum tube on one side of the cone.

[0016] In the above technical solution, further:

[0017] The dynamic seal is a mechanical seal.

[0018] In the above technical solution, further, the vacuum suction head includes:

[0019] The cover body is connected to one end of the vacuum tube located in the cone, and a vacuum cavity is formed inside the cover body and is communicated with the vacuum tube;

[0020] A vacuum nozzle is connected to a side of the cover body away from the vacuum tube and communicated with the vacuum chamber;

[0021] There are multiple suction nozzles, which are arranged at equal intervals along the circumference of the vacuum tube axis, and the end away from the cover body is inclined away from the vacuum tube axis.

[0022] In the above technical solution, further, the air extraction nozzle includes:

[0023] The connecting part comprises a first connecting pipe and a second connecting pipe which are coaxially connected, and flange ends are arranged at the connecting parts;

[0024] The cylinder is connected to the second connecting pipe, and a sealing cover is provided at one end away from the second connecting pipe, and a plurality of first air holes are formed on the sealing cover;

[0025] An annular connecting block, installed between the second connecting pipe and the cylinder;

[0026] There are two annular connecting blocks, and the second connecting pipe is located between the two annular connecting blocks and is provided with a plurality of second air holes.

[0027] In the above technical solution, further, it also includes:

[0028] An air inlet pipe is installed inside the vacuum tube, and one end of the air inlet pipe extends into the vacuum chamber;

[0029] Among them, nitrogen is passed through the intake pipe.

[0030] In the above technical solution, further:

[0031] The surface of the vacuum tube and vacuum tip are both provided with PTFE coating.

[0032] The beneficial effects of the utility model are:

[0033] 1. By adopting static sealing between the vacuum suction head and the cone, that is, setting a static seal between the vacuum tube and the cone, and setting a dynamic seal between the vacuum tube and the vacuum pump, and placing the dynamic seal outside the cone, the vacuum suction head and the cone rotate at the same time, eliminating the relative friction between the two, and avoiding the wear of the surface coating of the vacuum tube and falling into the material, which affects the quality of the material.

[0034] 2. By adopting multiple vacuum nozzles, the vacuum effect and efficiency are effectively improved, and the vacuum nozzle adopts a cylindrical structure so that the vacuum nozzle has a stirring effect on the material.

[0035] 3. By introducing nitrogen into the cone, oxidation and contamination of materials can be effectively avoided, and the vacuum degree can be effectively maintained to improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the utility model;

[0037] Figure 2 This utility model Figure 1 The enlarged view of point A in the middle;

[0038] Figure 3 It is a structural schematic diagram of the vacuum suction head of the utility model;

[0039] The markings in the figure are as follows: 1. base; 2. cone; 3. vacuum suction head; 30. cover body; 31. cavity; 32. suction nozzle; 320. first connecting pipe; 321. second connecting pipe; 322. cylinder; 323. sealing cover; 324. first air hole; 325. annular connecting block; 326. second air hole; 4. vacuum tube; 5. supporting shaft; 6. air inlet pipe; 7. static seal; 70. sealing ring; 71. abutment block; 8. dynamic seal. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0041] Embodiment 1:

[0042] This embodiment provides a double-cone vacuum dryer, comprising:

[0043] A machine base 1 is provided with a rotating cone 2;

[0044] A vacuum suction head 3 is installed in the cone 2 and is used for vacuuming the cone 2;

[0045] Wherein, static sealing is adopted between the vacuum suction head 3 and the cone 2.

[0046] It can be seen from this embodiment that by adopting a static seal between the vacuum suction head 3 and the cone 2, the sealing performance of the connection is effectively guaranteed, and there is no relative rotation at the connection, and thus no mutual friction, which reduces the wear of the surface coating of the vacuum suction head 3 and prevents the coating debris from being mixed into the material, causing uncontrollable influence on the quality of the material.

[0047] Embodiment 2:

[0048] This embodiment provides a double-cone vacuum dryer, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including:

[0049] A vacuum tube 4, one end of which is located inside the cone 2 and connected to the vacuum head 3, and the other end of which extends to the outside of the cone 2 and is connected to a vacuum pump;

[0050] The support shaft 5 is installed at both ends of the cone 2 and connected to the base 1 through a bearing seat;

[0051] The sealing assembly includes a static seal 7 installed between the vacuum tube 4 and the cone 2 and a dynamic seal 8 installed between the vacuum tube 4 and the vacuum pump.

[0052] The vacuum tube 4 coaxially passes through the support shaft 5 located at one end of the cone 2 .

[0053] It can be seen from the present embodiment that by disposing a static seal 7 between the vacuum tube 4 and the cone 2, and disposing a dynamic seal 8 between the vacuum tube 4 and the vacuum pump, and by placing the dynamic seal 8 outside the cone 2, the vacuum suction head 3 and the cone 2 can rotate simultaneously, thereby eliminating the relative friction between the two, and ensuring that the debris of the surface coating of the vacuum tube 4 due to wear will not fall off and be mixed in the material, thereby affecting the quality of the material.

[0054] Embodiment 3:

[0055] This embodiment provides a double-cone vacuum dryer, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0056] The static sealing member 7 comprises a sealing ring 70 and an abutting block 71 for abutting the sealing ring 70 , and the abutting block 71 is sleeved on the surface of the vacuum tube 4 on one side inside the cone 2 .

[0057] It can be seen from this embodiment that the sealing ring 70 is abutted by the abutting block 71, which has a simple structure and effectively ensures the sealing effect at the abutting point, ensures the maintenance of the vacuum degree inside the cone 2 and prevents material leakage.

[0058] Embodiment 4:

[0059] This embodiment provides a double-cone vacuum dryer, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0060] The dynamic seal 8 is a mechanical seal;

[0061] Among them, the specific structure of the mechanical seal is the existing technology and will not be repeated here.

[0062] It can be seen from this embodiment that the sealing effect of the connection is effectively ensured by adopting the mechanical seal.

[0063] Embodiment 5:

[0064] This embodiment provides a double-cone vacuum dryer, which, in addition to the technical solutions of the above embodiments, also has the following technical features. The vacuum suction head 3 includes:

[0065] The cover 30 is connected to one end of the vacuum tube 4 located in the cone 2, and forms a vacuum chamber 31 inside, which is communicated with the vacuum tube 4;

[0066] The vacuum nozzle 32 is connected to the side of the cover 30 away from the vacuum tube 4 and communicates with the vacuum chamber 31;

[0067] There are multiple suction nozzles 32, which are arranged at equal intervals along the circumference of the axis of the vacuum tube 4, and the end away from the cover body 30 is inclined away from the axis of the vacuum tube 4;

[0068] Meanwhile, there are three air suction nozzles 32 .

[0069] It can be seen from the present embodiment that by providing three suction nozzles 32 and arranging them in an inclined circular manner, when the vacuum suction head 3 follows the rotation of the cone 2, the suction nozzles 32 can always be kept inclined upward, thereby effectively ensuring the vacuuming effect and improving the suction efficiency. Moreover, the three suction nozzles 32 can ensure that there are two suction nozzles 32 when the suction nozzles 32 are all inclined upward at a small angle, thereby ensuring the suction efficiency.

[0070] Embodiment 6:

[0071] This embodiment provides a double-cone vacuum dryer, which, in addition to the technical solutions of the above embodiments, also has the following technical features. The air extraction nozzle 32 includes:

[0072] The connecting part includes a first connecting pipe 320 and a second connecting pipe 321 which are coaxially connected, and flange ends are provided at the connecting parts;

[0073] The cylinder 322 is connected to the second connecting pipe 321, and a sealing cover 323 is provided at one end away from the second connecting pipe 321, and a plurality of first air holes 324 are formed on the sealing cover 323;

[0074] An annular connecting block 325 is installed between the second connecting pipe 321 and the cylinder 322;

[0075] There are two annular connecting blocks 325, and the second connecting pipe 321 is located between the two annular connecting blocks 325 and has a plurality of second air holes 326;

[0076] Meanwhile, the annular connecting block 325 and the connecting pipe and the cylinder 322 may be welded.

[0077] It can be seen from this embodiment that by adopting the structure of the cylinder 322, and arranging the cover 323 on the cylinder 322, and opening a plurality of first air holes 324 on the surface of the cylinder 322 and the cover 323, the cylinder 322 and the cover 323 can be rotated with the cone 2 to stir the material, thereby improving the drying efficiency of the material;

[0078] The first connecting pipe 320 and the second connecting pipe 321 are connected by flanges, which can improve the convenience of installing and removing the air extraction nozzle 32, and facilitate the maintenance and replacement of the air extraction nozzle 32;

[0079] At the same time, two annular connecting blocks 325 are used to install the second connecting pipe 321 and the cylinder 322, so as to improve the structural strength of the connection and ensure the coaxiality between the cylinder 322 and the second connecting pipe 321, so as to avoid the cylinder 322 from tilting due to the stirring effect, thereby avoiding affecting the air extraction efficiency;

[0080] In addition, a plurality of second air holes 326 are opened on the inner wall of the second connecting tube 321 between the two annular connecting blocks 325, which can ensure the number of exhaust holes of the entire cylinder 322 and avoid the situation where the number of exhaust holes is reduced due to the setting of the two annular connecting blocks 325, thereby ensuring the exhaust efficiency.

[0081] Embodiment 7:

[0082] This embodiment provides a double-cone vacuum dryer, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including:

[0083] The air inlet pipe 6 is installed inside the vacuum tube 4, and one end of the air inlet pipe extends into the vacuum chamber 31;

[0084] Among them, nitrogen gas is passed through the air intake pipe 6 .

[0085] It can be seen from this embodiment that by introducing nitrogen into the cone 2, oxidation and contamination of materials can be effectively avoided, and the vacuum degree can be effectively maintained to improve work efficiency.

[0086] Embodiment 8:

[0087] This embodiment provides a double-cone vacuum dryer, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0088] The surfaces of the vacuum tube 4 and the vacuum suction head 3 are both provided with a polyfluoride coating.

[0089] It can be seen from this embodiment that by providing a polyfluoride coating on the surface of the vacuum tube 4, the corrosion resistance of the vacuum suction head 3 is effectively improved and the service life is extended. The static sealing between the vacuum tube 4 and the cone 2 further extends the service life of the polyfluoride coating.

[0090] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A double cone vacuum dryer, characterized in that: include: A machine base (1) is provided with a rotating cone (2); A vacuum suction head (3) is installed in the cone (2) and is used to evacuate the cone (2); Wherein, a static seal is adopted between the vacuum suction head (3) and the cone (2); A vacuum tube (4), one end of which is located inside the cone (2) and connected to the vacuum suction head (3), and the other end of which extends to the outside of the cone (2) and is connected to a vacuum pump; The support shaft (5) is installed at both ends of the cone (2) and is connected to the machine base (1) via a bearing seat; A sealing assembly comprising a static sealing member (7) installed between the vacuum tube (4) and the cone (2) and a dynamic sealing member (8) installed between the vacuum tube (4) and the vacuum pump; The vacuum tube (4) coaxially passes through a support shaft (5) located at one end of the cone (2).

2. The double cone vacuum dryer according to claim 1, characterized in that: The static seal (7) comprises a sealing ring (70) and an abutment block (71) for abutting the sealing ring (70), and the abutment block (71) is sleeved on the surface of the vacuum tube (4) on one side located inside the cone (2).

3. The double cone vacuum dryer according to claim 1, characterized in that: The dynamic seal (8) is a mechanical seal.

4. The double cone vacuum dryer according to claim 1, characterized in that: The vacuum suction head (3) comprises: A cover body (30) is connected to one end of the vacuum tube (4) located inside the cone (2), and a vacuum chamber (31) is formed inside the cover body and is in communication with the vacuum tube (4); A vacuum nozzle (32) is connected to a side of the cover (30) away from the vacuum tube (4) and is in communication with the vacuum chamber (31); There are a plurality of suction nozzles (32), which are arranged at equal intervals along the circumference of the axis of the vacuum tube (4), and the end away from the cover body (30) is inclined away from the axis of the vacuum tube (4).

5. The double cone vacuum dryer according to claim 4, characterized in that: The air extraction nozzle (32) comprises: The connecting part comprises a first connecting pipe (320) and a second connecting pipe (321) which are coaxially connected, and flange ends are arranged at the connecting parts; The cylinder (322) is connected to the second connecting pipe (321), and a sealing cover (323) is provided at one end away from the second connecting pipe (321), and a plurality of first air holes (324) are provided on the sealing cover (323); An annular connecting block (325) is installed between the second connecting pipe (321) and the cylinder (322); There are two annular connection blocks (325), and the second connection pipe (321) is located between the two annular connection blocks (325) and is provided with a plurality of second air holes (326).

6. The double cone vacuum dryer according to claim 4, characterized in that: Also includes: An air inlet pipe (6) is installed inside the vacuum tube (4) and one end of which extends into the vacuum chamber (31); Wherein, nitrogen is passed through the air inlet pipe (6).

7. The double cone vacuum dryer according to claim 1, characterized in that: The surfaces of the vacuum tube (4) and the vacuum suction head (3) are both provided with a tetrafluoroethylene coating.

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