Novel drum filter

Abstract

The utility model provides a novel rotary drum filter, which relates to the technical field of polycrystalline silicon and comprises a tank body, the stirring shaft is arranged in the tank body; one end of the driving shaft is connected with first driving equipment through a first magnetic coupling, the other end of the driving shaft is a supporting end, and the supporting end of the driving shaft is located in the groove body; one end of the rotary joint is connected with the supporting end of the driving shaft, and the other end of the rotary joint is connected with a suction filtration opening used for connecting a vacuum pump; the magnetic transmission equipment is in transmission connection with the driving shaft and the first driving equipment; static sealing is adopted between the magnetic transmission equipment and the groove body. The driving shaft is in transmission connection with the first driving equipment through the first magnetic coupling, dynamic sealing is changed into static sealing based on the magnetic transmission characteristic of the first magnetic coupling, zero leakage between the driving shaft and the tank body can be achieved, environmental pollution is reduced, the environmental protection requirement can be met, meanwhile, the leakage overhaul frequency is greatly reduced, and the service life of the tank body is prolonged. The service life and the stability of equipment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polysilicon, in particular to a novel rotary drum filter. Background Art

[0002] See also Figure 1 The existing rotary drum filter includes a tank body 91, a drive shaft 92 and a stirring shaft. One end of the drive shaft 92 (hollow shaft) rotates through the tank body 91 and is connected to a motor 93 through an elastic coupling. The other end is a support end. The support end of the drive shaft 92 rotates through the tank body 91; packing seals 94 are used between both ends of the drive shaft 92 and the tank body 91; the end of the support end of the drive shaft 92 is located outside the tank body 91 and is connected to a suction port 95 through a rotary joint 96, and the suction port 95 is used to connect a vacuum pump; the inside of the rotary joint 96 adopts a mechanical seal, and the outside and the support end adopt a packing seal 94. One end of the stirring shaft rotates through the tank body 91 and is connected to a motor 93 through an elastic coupling. A packing seal 94 is also used between the stirring shaft and the tank body 91. The stirring shaft is arranged in parallel with the drive shaft 92.

[0003] As the polysilicon industry's environmental protection requirements increase, the above-mentioned drum filter exposes many technical problems, such as:

[0004] 1. In the original design, packing seals 94 are used as dynamic seals between both ends of the drive shaft 92 and the groove body 91. The sealing effect is determined by the quality of the packing itself, the degree of compression, and the wear of the packing. These uncertain factors cannot guarantee its effective sealing.

[0005] 2. The currently used packing seal 94 has a short service life and high maintenance frequency.

[0006] 3. The drive shaft 92 has many sealing points and the stress caused by the tightening of the packing increases, which leads to fatigue fracture, increased shaft power, and increased power consumption.

[0007] The use of a packing seal 94 as a dynamic seal between the stirring shaft and the tank body 91 is similar to the above contents (1-3).

[0008] 4. The rotary joint 96 is located outside the tank body 91. The sealing performance of the mechanical seal inside the rotary joint 96 is also restricted by factors such as the wear resistance of the friction pair and the effective compensation of the spring. Leakage often occurs and the service life is short.

[0009] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or any form of implication that the information constitutes the prior art known to those skilled in the art. Utility Model Content

[0010] In view of the above situation, the utility model provides a new type of rotary drum filter, aiming to solve the technical problems pointed out in the above background technology.

[0011] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0012] The utility model provides a novel rotary drum filter, comprising:

[0013] Tank body;

[0014] A stirring shaft is arranged in the tank body;

[0015] A drive shaft located in the tank body, one end of which is connected to a first drive device via a first magnetic coupling, and the other end of which is a support end, and the support end of the drive shaft is located in the tank body;

[0016] A rotary joint, one end of which is connected to the supporting end of the driving shaft and the other end of which is connected to a suction port, and the suction port is used to connect to a vacuum pump;

[0017] A magnetic transmission device, used for transmission connection between the drive shaft and the first drive device;

[0018] Among them, static sealing is adopted between the magnetic transmission equipment and the tank body.

[0019] In some embodiments of the present invention, the magnetic transmission device includes a first magnetic coupling; the first magnetic coupling includes a first sealed housing, and a first inner magnet and a first outer magnet located in the first sealed housing;

[0020] The first sealing shell is installed on the tank body; static sealing is adopted between the first sealing shell and the tank body;

[0021] The first inner magnet is connected to the drive shaft;

[0022] The first external magnet is connected to the first drive device.

[0023] In some embodiments of the utility model, the magnetic transmission device further includes a second magnetic coupling; one end of the stirring shaft is connected to a second driving device via the second magnetic coupling; the second magnetic coupling includes a second sealed housing, and a second inner magnet and a second outer magnet located in the second sealed housing;

[0024] The second sealing shell is installed on the tank body; a static seal is adopted between the second sealing shell and the tank body;

[0025] The second inner magnet is connected to the drive shaft;

[0026] The second outer magnet is connected to the second drive device.

[0027] In some embodiments of the present invention, the stirring shaft is parallel to the driving shaft.

[0028] In some embodiments of the present invention, the first driving device includes a first motor.

[0029] In some embodiments of the present invention, the first motor is connected to a first reducer.

[0030] In some embodiments of the present invention, the second driving device includes a second motor.

[0031] In some embodiments of the present invention, the second motor is connected to a second reducer.

[0032] In some embodiments of the present invention, the rotary joint is located in the tank body, and the rotary joint is statically sealed to the tank body.

[0033] In some embodiments of the utility model, a flange is provided on one side of the tank body, and the rotary joint is connected to the filtration port via the flange.

[0034] The embodiments of the present invention have at least the following advantages or beneficial effects:

[0035] The drive shaft is connected to the first drive device through the first magnetic coupling. Based on the magnetic transmission characteristics of the first magnetic coupling, the dynamic seal (packing seal) is changed to a static seal, which can achieve zero leakage between the drive shaft and the tank body, reduce environmental pollution, meet environmental protection requirements, and at the same time, greatly reduce the frequency of leakage inspections and repairs, and improve the service life and stability of the equipment.

[0036] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 It is a structural schematic diagram of a new type of rotary drum filter in the prior art. Figure 1 The internal structure of the tank is shown;

[0039] Figure 2 The schematic diagram of the structure of the novel rotary drum filter provided in this application is as follows: Figure 2 The local structure inside the tank is shown.

[0040] Figure 1Icons in: 91-tank body, 92-drive shaft, 93-motor, 94-packing seal, 95-filter port, 96-rotary joint;

[0041] Figure 2 Icons in: 1- tank body, 2- driving shaft, 4- first magnetic coupling, 41- first sealing housing, 42- first inner magnet, 43- first outer magnet, 5- first driving device, 6- flange, 7- suction port. DETAILED DESCRIPTION

[0042] In the following, only some exemplary embodiments are briefly described. As those skilled in the art can appreciate, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present invention.

[0043] In the description of the embodiments of the present invention, it should be understood that the terms "inside", "outside", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0045] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0046] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0047] Example

[0048] See also Figure 1-2The present embodiment provides a new type of rotary drum filter, including a tank body 1, a drive shaft 2, a rotary joint, a first magnetic coupling 4, a stirring shaft and a second magnetic coupling; wherein, due to viewing angle reasons, the stirring shaft and the second magnetic coupling are not shown in the figure, and the two are understood with reference to the drive shaft 2 and the first magnetic coupling 4.

[0049] The drive shaft 2 is located in the tank body 1, one end of the drive shaft 2 is connected to the first drive device 5 through the first magnetic coupling 4, and the other end is a support end. The support end of the drive shaft 2 is located in the tank body 1 ( Figure 2 The supporting end of the middle driving shaft 2 is blocked by the slot body 1). The first driving device 5 includes a first motor and a first reducer.

[0050] In a specific implementation scenario, the drive shaft 2 is connected to the support shaft via a rotating drum, that is, the drive shaft 2 and the support shaft are indirectly connected via the rotating drum, and the support shaft serves as a support end of the drive shaft 2 .

[0051] The rotary joint is located in the tank 1 ( Figure 2 The rotary joint is blocked by the tank body 1), and a flange 6 is provided on one side of the tank body 1; one end of the rotary joint is connected to the support end of the drive shaft 2, and the other end is connected to the suction port 7 through the flange 6 on the tank body 1, and the suction port 7 is used to connect the vacuum pump. Both ends of the rotary joint have flanges 6.

[0052] The first magnetic coupling 4 includes a first sealed shell 41, and a first inner magnet 42 and a first outer magnet 43 located in the first sealed shell 41; the first sealed shell 41 is installed on the slot body 1, and a static seal is adopted between the first sealed shell 41 and the slot body 1; the first inner magnet 42 is connected to the driving shaft 2; the first outer magnet 43 is connected to the output end of the first driving device 5.

[0053] The stirring shaft is arranged in the tank body 1, and one end of the stirring shaft is connected to the second driving device through the second magnetic coupling. The stirring shaft is arranged in parallel with the driving shaft 2. The second driving device includes a second motor and a second reducer.

[0054] The second magnetic coupling includes a second sealed shell, and a second inner magnet and a second outer magnet located in the second sealed shell; the second sealed shell is installed on the slot body 1, and a static seal is adopted between the second sealed shell and the slot body 1; the second inner magnet is connected to the driving shaft 2; the second outer magnet is connected to the output end of the second driving device.

[0055] In combination with the above content, this embodiment has at least the following beneficial effects:

[0056] 1. The drive shaft 2 is connected to the first drive device 5 through the first magnetic coupling 4. Based on the magnetic transmission characteristics of the first magnetic coupling 4, the dynamic seal (packing seal) is changed to a static seal, which can achieve zero leakage between the drive shaft 2 and the tank body 1, reduce environmental pollution, meet environmental protection requirements, and at the same time, greatly reduce the frequency of leakage inspection and maintenance, and improve the service life and stability of the equipment.

[0057] 2. The stirring shaft is connected to the second driving device through the second magnetic coupling. Based on the characteristics of the magnetic transmission of the second magnetic coupling, the dynamic seal is changed to a static seal, which is conducive to achieving zero leakage between the stirring shaft and the tank body 1.

[0058] 3. The position of the rotary joint is changed to the inside of the tank body 1. The filter port 7 can be connected to the rotary joint through the flange 6 on the tank body 1 (static seal). In this way, the packing seal between the supporting end of the driving shaft 2 and the tank body 1 in the original design, and the packing seal between the rotary joint and the supporting end of the driving shaft 2 in the original design can be cancelled (even if the leakage occurs in the tank body 1), thereby reducing the sealing points, simplifying the structure, and overcoming a series of problems caused by the use of packing seals.

[0059] In combination with the above content, it can be known that the first magnetic coupling 4 and the second magnetic coupling adopt magnetic transmission, and both are magnetic transmission devices. By adopting a static seal between the magnetic transmission device and the tank body 1, the dynamic seal is changed to a static seal, thereby achieving zero leakage.

[0060] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. In the absence of conflicts, the embodiments of the present application and the features in the embodiments may be combined with each other at will. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A new type of rotary drum filter, characterized in that: include: Tank body; A stirring shaft is arranged in the tank body; A drive shaft located in the slot body, one end of which is connected to a first drive device via a first magnetic coupling and the other end of which is a support end, wherein the support end of the drive shaft is located in the slot body; A rotary joint, one end of which is connected to the supporting end of the driving shaft and the other end of which is connected to a suction port, wherein the suction port is used to connect to a vacuum pump; A magnetic transmission device, used for transmission connection between the driving shaft and the first driving device; Wherein, a static seal is adopted between the magnetic transmission device and the tank body.

2. The novel rotary drum filter according to claim 1 is characterized in that: The magnetic transmission device comprises a first magnetic coupling; the first magnetic coupling comprises a first sealed housing, and a first inner magnet and a first outer magnet located in the first sealed housing; The first sealing shell is installed on the tank body; a static seal is adopted between the first sealing shell and the tank body; The first inner magnet is connected to the drive shaft; The first external magnet is connected to the first driving device.

3. The novel rotary drum filter according to claim 2 is characterized in that: The magnetic transmission device further includes a second magnetic coupling; one end of the stirring shaft is connected to a second driving device via the second magnetic coupling; the second magnetic coupling includes a second sealed housing, and a second inner magnet and a second outer magnet located in the second sealed housing; The second sealing shell is installed on the tank body; a static seal is adopted between the second sealing shell and the tank body; The second inner magnet is connected to the drive shaft; The second external magnet is connected to the second drive device.

4. The novel rotary drum filter according to claim 1 is characterized in that: The stirring shaft is parallel to the driving shaft.

5. The novel rotary drum filter according to claim 1 is characterized in that: The first drive device includes a first motor.

6. The novel rotary drum filter according to claim 5 is characterized in that: The first motor is connected to a first reducer.

7. The novel rotary drum filter according to claim 3 is characterized in that: The second drive device includes a second electric motor.

8. The novel rotary drum filter according to claim 7 is characterized in that: The second motor is connected to a second reducer.

9. The novel rotary drum filter according to any one of claims 1 to 8, characterized in that: The rotary joint is located in the tank body, and the rotary joint is statically sealed with the tank body.

10. The novel rotary drum filter according to claim 9 is characterized in that: A flange is provided on one side of the tank body, and the rotary joint is connected to the suction port via the flange.

Images