Composite sealing device of double-cone drying equipment

Abstract

The utility model discloses a composite sealing device of double-cone drying equipment, which belongs to the technical field of pharmaceutical machinery and comprises a tank rotatably connected to a frame, and a suction filtration head is arranged in the tank. One end of the near-tank vacuum pipe extends out of the tank body and is connected with a first flange, and a conical sealing ring is arranged between the first flange and the near-tank vacuum pipe; a second flange is fixed on a joint of the rotary joint and is arranged towards the tank body; an annular polytetrafluoroethylene gasket is arranged between the joint and the near-tank vacuum tube; the rotary joint is fixedly connected with the rack, and the first flange is connected with the second flange through a fastening bolt; and the far-tank vacuum pipe is inserted from one side of the rotary joint opposite to the tank body and does not exceed the second flange. The problems that in the prior art, a mechanical seal is welded to a connecting pipe, the connecting pipe needs to drive the mechanical seal and a second vacuum pipe to rotate together, the service life of the mechanical seal is shortened, and replacement is difficult when the mechanical seal breaks down are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pharmaceutical machinery, and particularly relates to a composite sealing device for double-cone drying equipment. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] Double cone drying equipment refers to a double cone dryer, which is a common vacuum drying equipment. It consists of a double cone rotary tank, a vacuum tube, a heating device, a drive mechanism and a control system. The working principle is: the air in the tank is extracted by a vacuum pump to form a vacuum, and at the same time, a heat medium is introduced into the jacket to indirectly heat the material, so that the moisture evaporates under a low-pressure environment; the tank rotates slowly under the drive of the motor, so that the material is constantly turned to ensure uniform heating and prevent agglomeration. The evaporated moisture is discharged through the vacuum tube. It is widely used in the pharmaceutical, food, chemical and other industries to dry temperature-sensitive powdered and granular materials.

[0004] Currently, common seal types for vacuum terminals include mechanical seals, rotary joints, O-ring seals, labyrinth seals, bellows seals, and combination seals, with mechanical seals and rotary joints being particularly popular. However, mechanical seals can suffer from insufficient lubrication in a vacuum environment, which can easily lead to sealing surface erosion, or spring fatigue, which can cause the sealing surfaces to lose contact and cause leakage. Rotary joints, on the other hand, suffer from dynamic friction between the vacuum tube and the conical PTFE sleeve, which can easily wear the sealing surface after long-term operation. This friction can cause foreign matter to enter the tank, contaminating the product and posing a quality risk.

[0005] The prior art discloses a static sealing device for a double-cone rotary dryer, comprising a tank body, a first vacuum tube extending through the tank body, the outer periphery of the first vacuum tube being connected to a fixed gland welded thereto, the fixed gland being connected to a fixed polytetrafluoroethylene sleeve of the tank body by fixing bolts; the end of the first vacuum tube extending through the tank body is inserted into a connecting tube, a sealing member being provided between the first vacuum tube and the connecting tube; one end of the connecting tube is connected to the tank body, and the other end is connected to the second vacuum tube via a mechanical seal.

[0006] Although the above solution can solve the problem of dynamic friction between the vacuum tube and the conical PTFE sleeve, it still has the following defects: the above solution adopts the method of welding a mechanical seal on the connecting pipe to fix the mechanical seal to the second vacuum tube, so that the connecting pipe needs to drive the mechanical seal and the second vacuum tube to rotate together, which causes relatively more serious wear on the sealing surface, reduces the service life of the mechanical seal, and causes leakage; in addition, since the connecting pipe is welded to the mechanical seal, when the sealing surface of the mechanical seal is worn or the spring inside the mechanical seal is fatigued and causes leakage, there is also the problem of difficulty in replacement. Utility Model Content

[0007] In view of this, the purpose of the present invention is to provide a composite sealing device for double-cone drying equipment. The composite sealing device of the present invention can solve the problem in the prior art that the connecting pipe needs to drive the mechanical seal and the second vacuum tube to rotate together, resulting in a reduced service life of the mechanical seal, and the problem that when the sealing surface of the mechanical seal is worn or the spring inside the mechanical seal is fatigued and causes leakage, it is difficult to replace it.

[0008] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0009] Provided is a composite sealing device for double-cone drying equipment, comprising a tank body, both sides of which are rotatably connected to a frame, a suction filter head being provided in the tank body; the suction filter head being connected to a near-tank vacuum tube, one end of which extends out of the tank body and is connected to a first flange; a conical sealing ring being provided between the first flange and the near-tank vacuum tube, with the tip of the conical sealing ring being arranged toward the tank body;

[0010] It also includes a rotary joint, a second flange is fixed on the joint of the rotary joint and is arranged toward the tank body, and an end of the joint is located on the side of the second flange facing the tank body; a near-tank vacuum tube and the joint of the rotary joint are coaxially arranged, and an annular polytetrafluoroethylene gasket is arranged between the joint and the near-tank vacuum tube;

[0011] The body of the rotary joint is fixed to the end of the frame away from the tank body, and the first flange and the second flange are connected by fastening bolts;

[0012] The far tank vacuum pipe is inserted from the rotary joint to the side of the tank body. The far tank vacuum pipe shall not exceed the second flange, so that the near tank vacuum pipe and the far tank vacuum pipe are connected through the rotary joint.

[0013] Preferably, the diameter of the vacuum tube near the tank is larger than the inner diameter of the joint and smaller than the outer diameter of the joint; the inner diameter of the annular Teflon gasket is larger than the inner diameter of the joint and smaller than the diameter of the vacuum tube near the tank, and the outer diameter of the annular Teflon gasket is larger than the outer diameter of the joint.

[0014] Preferably, an internal thread is provided in the bolt hole of the first flange, and the first flange is threadedly connected to a plurality of fastening bolts; the inner wall of the bolt hole of the second flange is smooth, and the fastening bolts are connected to nuts after passing through the second flange.

[0015] Preferably, the inner ring diameter of the first flange is larger than the outer diameter of the vacuum tube near the tank, equal to the tip diameter of the conical sealing ring, and smaller than the tail diameter of the conical sealing ring; the inner diameter of the conical sealing ring is equal to the outer diameter of the vacuum tube near the tank.

[0016] Preferably, a baffle is also fixed to the outer periphery of the vacuum tube near the tank, and the baffle is arranged on the side of the first flange facing the tank body.

[0017] Preferably, a gear plate is fixed between the tank body and the baffle plate, near the outer periphery of the tank vacuum tube.

[0018] Preferably, between the tank body and the gear plate, the outer periphery of the vacuum tube near the tank is fixedly connected to the inner ring of the bearing seat, and the outer shell of the bearing seat is fixed on the frame.

[0019] Preferably, a third flange is fixed between the tank body and the bearing seat, near the outer periphery of the tank vacuum tube, and the third flange is fixedly connected to the tank body by ordinary bolts.

[0020] Preferably, the third flange, the bearing seat, the gear plate and the baffle plate are fixedly connected.

[0021] Preferably, inside the tank body, a polytetrafluoroethylene sleeve is fixed on the outer periphery of the near-tank vacuum tube, and the polytetrafluoroethylene sleeve seals the through hole where the near-tank vacuum tube passes through the tank body.

[0022] Compared with the prior art, the advantages and positive effects of this utility model are:

[0023] The utility model discloses a method for the utility model wherein the joint of the vacuum tube near the tank and the rotary joint is connected by the first flange, the second flange and the fastening bolts, and the annular polytetrafluoroethylene gasket is clamped between the joint of the vacuum tube near the tank and the rotary joint. The vacuum tube near the tank only needs to drive the joint of the rotary joint to rotate, which causes less wear on the annular polytetrafluoroethylene gasket and prolongs the service life of the annular polytetrafluoroethylene gasket. This method has advantages over the prior art in which the connecting tube is connected to the mechanical seal and the mechanical seal is fixedly connected to the second vacuum tube. When the annular polytetrafluoroethylene gasket is worn, the fastening bolts between the second flange and the first flange are loosened, so that the first flange is away from the annular polytetrafluoroethylene gasket, the old annular polytetrafluoroethylene gasket is removed, and a new annular polytetrafluoroethylene gasket is installed between the vacuum tube near the tank and the rotary joint, and then the fastening bolts between the second flange and the first flange are re-tightened so that the first flange clamps the annular polytetrafluoroethylene gasket. The utility model discloses a method for the utility model wherein the vacuum tube near the tank and the joint of the rotary joint are connected by the first flange, the second flange and the first flange are re-tightened, so that the first flange clamps the annular polytetrafluoroethylene gasket, and the utility model discloses a method for the utility model BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0025] Figure 1 This is a schematic diagram of the installation position of the composite sealing device according to an embodiment of the utility model;

[0026] Figure 2 This is a schematic structural diagram of a composite sealing device according to an embodiment of the present utility model;

[0027] Figure 3 This is an embodiment of the utility model Figure 2 An enlarged schematic diagram of point A in FIG.

[0028] In the picture:

[0029] 1. Near-tank vacuum tube; 2. PTFE sleeve; 3. Bearing seat; 4. Gear plate; 5. Baffle plate; 6. First flange; 7. Conical sealing ring; 8. Annular PTFE gasket; 9. Rotary joint; 10. Far-tank vacuum tube; 11. Second flange. DETAILED DESCRIPTION

[0030] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0031] The present invention will be described in detail below with reference to the accompanying drawings.

[0032] This embodiment discloses a composite sealing device for a double-cone drying device, such as Figure 1 As shown, it includes a double-conical tank body, both sides of which are rotatably connected to the frame, and a suction filter head is provided inside the tank body; the suction filter head is connected to the tank-near vacuum tube 1, and one end of the tank-near vacuum tube 1 extends out of the tank body and is connected to the joint of the rotary joint 9. Specifically, as Figure 2 As shown, one end of the near-tank vacuum tube 1 extending out of the tank body is connected to the first flange 6, and a conical sealing ring 7 is arranged between the first flange 6 and the near-tank vacuum tube 1. The first flange 6 is sleeved on the near-tank vacuum tube 1, and then the conical sealing ring 7 is sleeved on the near-tank vacuum tube 1, with the tip of the conical sealing ring 7 facing the tank body; when the first flange 6 moves in a direction away from the tank body, the first flange 6 clamps the conical sealing ring 7 and is tightly connected to the near-tank vacuum tube 1; when the first flange 6 moves toward the tank body, the first flange 6 and the near-tank vacuum tube 1 are no longer tightly connected.

[0033] like Figure 2 As shown, it also includes a rotary joint 9, the joint of the rotary joint 9 is arranged toward the tank body, a second flange 11 is fixed on the joint, and the joint end of the rotary joint 9 is located on the side of the second flange 11 facing the tank body; the near-tank vacuum tube 1 and the joint of the rotary joint 9 are coaxially arranged, the end of the near-tank vacuum tube 1 is aligned with the joint end of the rotary joint 9, and an annular polytetrafluoroethylene gasket 8 is arranged between the joint end of the rotary joint 9 and the end of the near-tank vacuum tube 1; the annular polytetrafluoroethylene gasket 8 is used to seal between the rotary joint 9 and the near-tank vacuum tube 1.

[0034] like Figure 1 、 Figure 2As shown, the body of the rotary joint 9 is fixed to the frame away from one end of the tank body, and the first flange 6 and the second flange 11 are connected by fastening bolts; since the body of the rotary joint 9 is fixed to the frame, when the first flange 6 and the second flange 11 are connected by fastening bolts, the first flange 6 will move toward the second flange 11, so that the first flange 6 contacts the annular polytetrafluoroethylene gasket 8 and tightly clamps it on the joint end of the rotary joint 9, thereby achieving a tight seal between the near-tank vacuum tube 1 and the rotary joint 9.

[0035] In this embodiment, the body of the rotary joint 9 is fixed on the frame; when the first flange 6 and the second flange 11 are connected by fastening bolts, the near-tank vacuum tube 1 is connected to the joint of the rotary joint 9, so that the near-tank vacuum tube 1 can drive the joint of the rotary joint 9 to rotate relative to the body of the rotary joint 9 and the frame.

[0036] It can also be understood that when the first flange 6 moves toward the direction of the rotary joint 9, the first flange 6 can clamp the conical sealing ring 7, so that the first flange 6 and the conical sealing ring 7 are fixed to the outer periphery of the near-tank vacuum tube 1; when the near-tank vacuum tube 1 rotates, the semi-conical sealing ring 7 can drive the first flange 6 to rotate, and the first flange 6 drives the second flange 11 to rotate through a plurality of fastening bolts. The second flange 11 is fixed on the joint of the rotary joint 9, so the second flange 11 can drive the joint of the rotary joint 9 to rotate relative to the body of the rotary joint 9; in this process, the annular polytetrafluoroethylene gasket 8 rotates with the joints of the near-tank vacuum tube 1, the first flange 6, and the rotary joint 9, and forms a seal under the clamping action.

[0037] like Figure 3 As shown, a groove is provided on the near-tank vacuum tube 1 , and a semi-conical sealing ring 7 is arranged in the groove to prevent the semi-conical sealing ring 7 from moving when the first flange 6 moves on the near-tank vacuum tube 1 .

[0038] like Figure 2 As shown, the far tank vacuum tube 10 is inserted from the rotary joint 9 body toward the side of the tank body. The far tank vacuum tube 10 must not exceed the second flange 11, so that the near tank vacuum tube 1 and the far tank vacuum tube 10 are connected through the rotary joint 9; when the near tank vacuum tube 1 rotates, the far tank vacuum tube 10 is fixed.

[0039] It should be noted that, in the prior art, a connecting pipe is used to connect the mechanical seal, and the mechanical seal is fixedly connected to the second vacuum tube, so that the connecting pipe needs to drive the mechanical seal and the second vacuum tube to rotate together, which causes relatively more serious wear on the sealing surface; whereas in the present embodiment, the joint between the near-tank vacuum tube 1 and the rotary joint 9 is connected by a first flange 6, a second flange 11 and a fastening bolt, and an annular polytetrafluoroethylene gasket 8 is clamped between the joint between the near-tank vacuum tube 1 and the rotary joint 9. The near-tank vacuum tube 1 only needs to drive the joint of the rotary joint 9 to rotate, which causes less wear on the annular polytetrafluoroethylene gasket 8 and extends the service life of the annular polytetrafluoroethylene gasket 8, thereby having more advantages over the prior art in which the connecting pipe is connected to the mechanical seal, and the mechanical seal is fixedly connected to the second vacuum tube.

[0040] It should also be noted that the annular PTFE gasket 8 rotates with the joint of the near-tank vacuum tube 1 and the rotary joint 9. When the annular PTFE gasket 8 is worn, loosen the fastening bolts between the second flange 11 and the first flange to move the first flange 6 away from the annular PTFE gasket 8, remove the old annular PTFE gasket 8, and then install the new annular PTFE gasket 8 between the near-tank vacuum tube 1 and the rotary joint 9. Then retighten the fastening bolts between the second flange 11 and the first flange to clamp the annular PTFE gasket 8 with the first flange. This makes installation and replacement very convenient. It solves the technical problem in the prior art that the connecting pipe is welded to the mechanical seal and that the mechanical seal cannot be replaced in time when a failure occurs.

[0041] In this embodiment, the diameter of the near-tank vacuum tube 1 is larger than the inner diameter of the joint of the rotary joint 9, and smaller than the outer diameter of the joint of the rotary joint 9; the inner diameter of the annular Teflon gasket 8 is larger than the inner diameter of the joint of the rotary joint 9, the inner diameter of the annular Teflon gasket 8 is smaller than the diameter of the near-tank vacuum tube 1, and the outer diameter of the annular Teflon gasket 8 is larger than the outer diameter of the joint of the rotary joint 9; so that the near-tank vacuum tube 1 can press the annular Teflon gasket 8 on the joint of the rotary joint 9.

[0042] In this embodiment, both the first flange 6 and the second flange 11 have multiple bolt holes, and the size and number of the bolt holes are the same. After the bolt holes of the first flange 6 and the second flange 11 are aligned, the fastening bolts are inserted to connect the first flange and the second flange 11; it should be noted that internal threads are provided in the bolt holes of the first flange 6, and the first flange 6 is threadedly connected to multiple fastening bolts; during installation, the first flange 6 with the fastening bolts should be first put on the near-tank vacuum tube 1, and then the conical sealing ring 7 should be put on the near-tank vacuum tube 1.

[0043] In this embodiment, the inner wall of the bolt hole of the second flange 11 is smooth, and the fastening bolt is bolted to the first flange 6. After the fastening bolt passes through the second flange 11, a nut is threaded on the fastening bolt, and the nut is tightened to move the first flange 6 toward the second flange 11, thereby pressing the annular PTFE gasket 8 onto the joint of the rotary joint 9.

[0044] like Figure 2 As shown, the inner diameter of the first flange 6 is larger than the outer diameter of the near-tank vacuum tube 1, equal to the tip diameter of the tapered sealing ring 7, and smaller than the tail diameter of the tapered sealing ring 7. The inner diameter of the tapered sealing ring 7 is equal to the outer diameter of the near-tank vacuum tube 1. This allows the first flange 6 to clamp the tapered sealing ring 7 when it moves toward the second flange 11. After the bolts are tightened, the first flange 6 clamps the tapered sealing ring 7 and is tightly connected to the near-tank vacuum tube 1, allowing the near-tank vacuum tube 1 to drive the tapered sealing ring 7 and the first flange 6 to rotate.

[0045] like Figure 2 As shown, a retaining plate 5 is fixed to the tube body of the near-tank vacuum tube 1 extending outside the tank body. The retaining plate 5 is located on the side of the first flange 6 facing the tank body. In this embodiment, a fastening bolt is pre-threaded onto the first flange 6, with the head of the fastening bolt facing the retaining plate 5. The bolt holes of the first flange 6 and the second flange 11 are aligned, the fastening bolt is passed through the second flange 11, and the nut is then attached and tightened with a wrench. This serves to limit the position of the first flange 6 and the rotary joint 9.

[0046] like Figure 2 As shown, between the tank body and the baffle plate 5, a gear plate 4 is fixed on the periphery of the near-tank vacuum tube 1. The gear plate 4 is connected to the driving device through a transmission mechanism, and the driving device drives the gear plate 4 and the near-tank vacuum tube 1 to rotate; Figure 1 As shown, a frame is provided on both sides of the tank body, the tank body is rotatably connected to the frame, the frame is hollow inside and open at the top, and a driving device (such as a motor) is provided inside the frame on the side where the gear plate 4 is located; Figure 1 As shown, the gear plate 4 is connected to the output end of the driving device via a chain; the driving device can drive the gear plate 4 to rotate, thereby driving the near-tank vacuum tube 1 to rotate.

[0047] like Figure 1 、 Figure 2 As shown, a bearing seat 3 is fixed to the outer periphery of the near-tank vacuum tube 1 between the tank body and the gear plate 4 (understandably, this refers to a fixed connection to the inner ring of the bearing seat 3). The near-tank vacuum tube 1 is rotatable relative to the bearing seat 3. The outer shell of the bearing seat 3 is fixed to the frame, allowing the near-tank vacuum tube 1 to rotate relative to the outer shell of the bearing seat 3 and the frame. The bearing seat 3 and the rotary joint 9 cooperate to support both ends of the near-tank vacuum tube 1.

[0048] like Figure 1 As shown, a bearing seat is also provided on the frame on the other side of the tank body, and a corresponding pipe is connected to the other side of the tank body in the bearing seat, so that both sides of the tank body can rotate on the frame. This embodiment solves the problem of sealing one end of the vacuum tube and does not involve improvements to the other side of the tank body. Here, it is only to illustrate that both sides of the tank body rotate with the frame, so the structural composition of the other side is not detailed.

[0049] like Figure 2 As shown, a third flange is secured to the outer periphery of the near-tank vacuum tube 1 between the tank body and the bearing housing 3. The third flange is secured to the tank body via conventional bolts. It will be appreciated that when the drive mechanism rotates the gear plate 4, the near-tank vacuum tube 1 rotates, simultaneously driving the tank body in rotation.

[0050] In this embodiment, in addition to being fixedly connected to the near-tank vacuum tube 1, the third flange, the bearing seat 3, the gear plate 4, and the baffle plate 5 are also fixedly connected to each other in order to better transmit the rotational force.

[0051] like Figure 2 As shown, inside the tank body, a polyfluoroethylene sleeve 2 is fixed on the outer periphery of the vacuum tube 1 near the tank, and the polyfluoroethylene sleeve 2 is sealed at the through hole of the vacuum tube 1 near the tank passing through the tank body, so as to seal the connection between the tank body and the vacuum tube 1 near the tank, and prevent dust from entering the tank body from the connection between the sealed tank body and the vacuum tube 1 near the tank; since the vacuum tube 1 near the tank is fixedly connected to the polyfluoroethylene sleeve 2, the vacuum tube 1 near the tank and the polyfluoroethylene sleeve 2 can rotate together, and the vacuum tube 1 near the tank and the tank body can rotate together, so the polyfluoroethylene sleeve 2 and the tank body can rotate synchronously, so that no dynamic friction is generated at the contact position between the tank body and the polyfluoroethylene sleeve 2.

[0052] Although the above description of the specific implementation methods of the present invention is combined with the accompanying drawings, it does not limit the scope of protection of the present invention. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present invention.

Claims

1. A composite sealing device for a double-cone drying device, characterized in that: The tank body comprises a tank body, both sides of which are rotatably connected to the frame, a suction filter head is provided in the tank body, the suction filter head is connected to a near-tank vacuum tube, one end of the near-tank vacuum tube extends out of the tank body and is connected to a first flange, a conical sealing ring is provided between the first flange and the near-tank vacuum tube, and the tip of the conical sealing ring is arranged toward the tank body; It also includes a rotary joint, a second flange is fixed on the joint of the rotary joint and is arranged toward the tank body, and an end of the joint is located on the side of the second flange facing the tank body; the near-tank vacuum tube and the joint of the rotary joint are coaxially arranged, and an annular polytetrafluoroethylene gasket is arranged between the joint and the near-tank vacuum tube; The body of the rotary joint is fixed to the end of the frame away from the tank body, and the first flange and the second flange are connected by fastening bolts; the far tank vacuum tube is inserted from the rotary joint away from the tank body, and the far tank vacuum tube shall not exceed the second flange, so that the near tank vacuum tube and the far tank vacuum tube are connected through the rotary joint.

2. A composite sealing device for a double-cone drying device according to claim 1, characterized in that: The diameter of the near-tank vacuum tube is larger than the inner diameter of the joint and smaller than the outer diameter of the joint; the inner diameter of the annular Teflon gasket is larger than the inner diameter of the joint and smaller than the diameter of the near-tank vacuum tube, and the outer diameter of the annular Teflon gasket is larger than the outer diameter of the joint.

3. The composite sealing device of a double-cone drying equipment according to claim 1, characterized in that: An internal thread is provided in the bolt hole of the first flange, and the first flange is threadedly connected to a plurality of fastening bolts; the inner wall of the bolt hole of the second flange is smooth, and the fastening bolts are connected to nuts after passing through the second flange.

4. The composite sealing device of a double-cone drying equipment according to claim 1, characterized in that: The inner ring diameter of the first flange is larger than the outer diameter of the near-tank vacuum tube, equal to the tip diameter of the conical sealing ring, and smaller than the tail diameter of the conical sealing ring; the inner diameter of the conical sealing ring is equal to the outer diameter of the near-tank vacuum tube.

5. The composite sealing device for a double-cone drying device according to claim 1, characterized in that: A baffle is also fixed on the outer periphery of the near-tank vacuum tube, and the baffle is arranged on a side of the first flange facing the tank body.

6. A composite sealing device for a double-cone drying device according to claim 5, characterized in that: A gear plate is fixed between the tank body and the baffle plate, near the outer periphery of the tank vacuum tube.

7. A composite sealing device for a double-cone drying device according to claim 6, characterized in that: Between the tank body and the gear plate, the outer periphery of the vacuum tube near the tank is fixedly connected to the inner ring of the bearing seat, and the outer shell of the bearing seat is fixed on the frame.

8. The composite sealing device for a double-cone drying device according to claim 7, characterized in that: A third flange is fixed between the tank body and the bearing seat near the outer periphery of the tank vacuum tube, and the third flange is fixedly connected to the tank body by ordinary bolts.

9. A composite sealing device for a double-cone drying device according to claim 8, characterized in that: The third flange, the bearing seat, the gear plate, and the baffle plate are fixedly connected.

10. The composite sealing device for double-cone drying equipment according to claim 1, characterized in that: Inside the tank body, a polytetrafluoroethylene sleeve is fixed on the outer periphery of the near-tank vacuum tube, and the polytetrafluoroethylene sleeve is sealed at the through hole where the near-tank vacuum tube passes through the tank body.

Images