Chlorosilane slurry drying machine

Abstract

The invention relates to the technical field of drying machines, in particular to a chlorosilane slurry drying machine which comprises a drying barrel and a main shaft, the main shaft is rotationally connected with the drying barrel, and part of the main shaft extends out of the drying barrel and is connected with a multi-stage sealing structure; the multi-stage sealing structure comprises a filler sealing assembly, a nitrogen sealing assembly and a mechanical sealing assembly which are sequentially arranged on the main shaft, the filler sealing assembly comprises a filler shell and a plugging piece, the main shaft is sleeved with the filler shell, a filling opening used for online filling is formed in the filler shell, and the plugging piece is used for plugging the filling opening. The main shaft is sealed for the first time through the packing sealing assembly, the main shaft is further sealed for the second time through the nitrogen sealing assembly, meanwhile, the nitrogen sealing assembly can reduce dust carried by positive pressure gas in the drying barrel to enter the mechanical sealing assembly, the service life of the mechanical sealing assembly is prolonged, and the main shaft is sealed for the third time through the mechanical sealing assembly; through the combination of the three parts, the sealing performance of the main shaft is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of dryers, and in particular to a chlorosilane slurry dryer. Background Art

[0002] Chlorosilane is an important organosilicon compound, widely used in polysiloxane, silicone rubber, silicone oil, optical fiber and other fields. In the production process of chlorosilane, a large amount of slurry will be produced. These slurries contain a large amount of organic matter and inorganic salts. If they are directly discharged, they will pollute the environment and waste a lot of resources. Therefore, it is necessary to treat the slurry, and a rake dryer is generally used to treat the slurry.

[0003] The rake dryer is designed and strengthened based on the technology of the traditional domestic vacuum rake dryer for various slurry, paste, granular, powdery, fibrous and other materials. The transmission part adopts a stable and durable cylindrical gear reducer, and the driving shaft adopts a thickened solid shaft, which fully guarantees the stable operation of the vacuum rake dryer in various harsh working environments.

[0004] The organic matter in the slurry contains silicon tetrachloride, which can be recycled, but it is harmful to the human body when it comes into contact with air. Therefore, the sealing requirements of the dryer are relatively high. The seal between the existing dryer shell and the main shaft generally adopts a packing seal or a mechanical seal. However, a single packing seal or mechanical seal is easy to wear when the main shaft rotates, resulting in poor sealing effect in the later stage and easy to cause leakage. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in order to solve the technical problems in the prior art, the present invention provides a chlorosilane slurry dryer.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a chlorosilane slurry dryer, including a drying cylinder and a main shaft, the main shaft is rotatably connected to the drying cylinder, part of the main shaft extends out of the drying cylinder and is connected to a multi-stage sealing structure; the multi-stage sealing structure includes a packing seal assembly, a nitrogen sealing assembly and a mechanical seal assembly which are arranged in sequence and arranged on the main shaft, the packing seal assembly includes a packing shell and a sealing member, the packing shell is sleeved on the main shaft, a filling port for online filling is opened on the packing shell, and the sealing member is arranged on the packing shell and used to seal the filling port.

[0007] The chlorosilane slurry dryer of the present invention performs a primary seal on the main shaft through a packing seal assembly, and performs a secondary seal on the main shaft through a nitrogen seal assembly. Meanwhile, the nitrogen seal assembly can reduce the dust carried by the positive pressure gas in the drying cylinder into the mechanical seal assembly, thereby improving the service life of the mechanical seal assembly. The mechanical seal assembly performs a tertiary seal on the main shaft. Through the combination of the three, the sealing performance of the main shaft is greatly improved, and the overall service life is improved. In addition, through the provision of the filling port, it is convenient to fill the packing online when the main shaft is working, thereby improving the convenience of filling the packing, and can improve the sealing performance between the packing housing and the main shaft.

[0008] Further, specifically, a cleaning cover is provided on the packing shell, and the cleaning cover is connected to the packing shell by bolts.

[0009] Furthermore, the nitrogen sealing assembly comprises a nitrogen sealing shell, which is sleeved on the main shaft and located between the mechanical sealing assembly and the packing shell, and an air filling port is provided on the nitrogen sealing shell.

[0010] Further, the mechanical seal assembly includes a first connecting plate, a second connecting plate, a first sealing ring and a second sealing ring, the first connecting plate is connected to the packing housing, the second connecting plate is connected to the main shaft, the first sealing ring is connected to the first connecting plate, the second sealing ring is connected to the second connecting plate, and the first sealing ring abuts against the second sealing ring.

[0011] Furthermore, the mechanical seal assembly also includes an adjusting sleeve, which is sleeved on the main shaft, the second sealing ring is connected to the adjusting sleeve, an adjusting screw is threadedly connected to the second connecting plate, and the adjusting screw abuts against one end of the adjusting sleeve away from the second sealing ring.

[0012] Furthermore, a sliding groove is provided in the adjusting sleeve along the axial direction of the main shaft, a push plate and a compression spring are provided in the sliding groove, the pressure plate abuts against the second sealing ring, and the compression spring abuts against a pad at one end of the pressure plate away from the second sealing ring.

[0013] Furthermore, a first sealing groove is provided on the side wall of the inner hole of the adjusting sleeve, a first sealing ring is provided in the first sealing groove, and the first sealing ring abuts against the outer ring of the main shaft; a second sealing groove is provided on the second sealing ring, a second sealing ring is provided in the second sealing groove, a sealing portion is provided on the adjusting sleeve, the second sealing ring is sleeved on the sealing portion, an extrusion portion is provided on the push plate, the extrusion portion is located in the second sealing groove, and abuts against the second sealing ring.

[0014] Furthermore, a pressure plate is connected to the first connecting plate, the pressure plate is in contact with the first sealing ring, and a portion of the first sealing ring is located between the pressure plate and the first connecting plate.

[0015] Furthermore, a protective cover is provided on the drying cylinder, and the protective cover is provided on the multi-stage sealing structure and the main shaft.

[0016] Furthermore, the protective cover is connected to a bearing seat, and the bearing seat realizes relative rotation with the main shaft through a bearing. The bearing seat is connected to a shaft end retaining ring, and the shaft end retaining ring abuts against the bearing.

[0017] The beneficial effects of the present invention are: 1. The main shaft is sealed once by the packing seal assembly, and then sealed twice by the nitrogen seal assembly. At the same time, the nitrogen seal assembly can reduce the positive pressure gas in the drying cylinder carrying dust into the mechanical seal assembly, thereby improving the service life of the mechanical seal assembly. The mechanical seal assembly seals the main shaft three times. The combination of the three greatly improves the sealing performance of the main shaft and the overall service life. In addition, the setting of the filling port facilitates the online filling of the packing when the main shaft is working, which improves the convenience of filling the packing and improves the sealing performance between the packing housing and the main shaft. 2. Through the arrangement of the first sealing ring and the second sealing ring, the second sealing ring rotates with the main shaft, while the first sealing ring is fixed, and mechanical sealing is achieved through the abutment between the first sealing ring and the second sealing ring, thereby reducing the possibility of leakage; 3. By setting the adjusting screw, the compression spring and the push plate, the adjusting screw is convenient for adjusting the position of the adjusting sleeve, thereby controlling the extrusion force between the first sealing ring and the second sealing ring, so as to achieve the purpose of adjusting the sealing effect between the first sealing ring and the second sealing ring, and the compression spring and the push plate can continuously provide pressure to the second sealing ring to ensure good sealing between the first sealing ring and the second sealing ring, and at the same time can cooperate with the adjusting screw to increase the pressure output to the second sealing ring, and because of the existence of the compression spring, there is a buffer space between the first sealing ring and the second sealing ring, which reduces the influence on the rotation of the first sealing ring and the second sealing ring; 4. Through the arrangement of the second sealing ring, the second sealing groove and the sealing part, the second sealing ring can increase the sealing performance between the second sealing ring and the adjusting sleeve. At the same time, when pressure is applied to the adjusting screw, the sealing part will also increase the extrusion force on the second sealing ring, thereby simultaneously improving the sealing performance between the second sealing ring and the adjusting sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the overall structure of the chlorosilane slurry dryer in the present invention.

[0020] Figure 2 It is a structural schematic diagram embodying the overall multi-stage sealing structure of the present invention.

[0021] Figure 3 It is a structural schematic diagram of the mechanical seal assembly in the present invention.

[0022] In the figure: 1. packing seal assembly; 11. packing shell; 12. filling port; 121. sealing member; 13. cleaning cover; 2. nitrogen sealing assembly; 21. nitrogen sealing shell; 211. charging port; 3. mechanical seal assembly; 31. first connecting plate; 311. pressure plate; 32. second connecting plate; 321. adjusting pin; 33. first sealing ring; 34. second sealing ring; 341. buffer gap; 35. adjusting sleeve; 351. adjusting screw; 352. sliding groove; 357. compression spring; 353. push plate; 3531. sealing part; 3532. second sealing ring; 3533. second sealing groove; 354. first sealing ring; 355. first sealing groove; 356. adjusting groove; 3. drying cylinder; 31. protective cover; 32. bearing seat; 33. shaft end retaining ring; 34. main shaft; 4. driving motor. Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0024] Reference Figures 1 to 3 A chlorosilane slurry dryer includes a frame, a drying cylinder 3 is rotatably connected to the frame, and a driving motor 4 is fixedly connected to the frame by bolts. A main shaft 34 is rotatably connected to the drying cylinder 3. One end of the main shaft 34 extends out of the drying cylinder 3 and is coaxially fixed with the output shaft of the driving motor 4, and the other end also extends out of the drying cylinder 3. The part of the main shaft 34 extending out of the drying cylinder 3 is provided with a multi-stage sealing structure. In this embodiment, two multi-stage sealing structures are provided to prevent the material in the drying cylinder 3 from leaking along the gap between the main shaft 34 and the drying cylinder 3.

[0025] The drying cylinder 3 is fixedly connected with a protective cover 31 at both ends of the main shaft 34 in the axial direction, and the protective cover 31 is arranged outside the main shaft 34 and the multi-stage sealing structure. A bearing seat 32 is fixedly connected to the protective cover 31, and the bearing seat 32 is rotatably connected to the end of the main shaft 34 away from the driving motor 4 through the bearing. A shaft end retaining ring 33 is fixedly connected to the bearing seat 32, and the shaft end retaining ring 33 abuts against the bearing, and then cooperates with the bearing seat 32 to limit the bearing. The arrangement of the bearing seat 32 and the shaft end retaining ring 33 enables the bearing to be installed or removed as a whole through the bearing seat 32 when it is installed or removed, which reduces the difficulty of disassembly between the bearing and the main shaft 34, and at the same time protects the main shaft 34 and the bearing, reducing the possibility of damage to the two during the disassembly process. The bearings are arranged at both ends of the main shaft 34, which can greatly improve the stability of the rotation of the main shaft 34, reduce the beating of the main shaft 34 when it rotates, and then keep the gap between the drying cylinder 3 and the main shaft 34 in a small and uniform state, so as to achieve the purpose of reducing leakage.

[0026] The multi-stage sealing structure includes a packing seal assembly 1, a nitrogen seal assembly 2 and a mechanical seal assembly 3 which are sequentially arranged and arranged on the main shaft 34. There is at least one packing seal assembly 1, and two in this embodiment. The main shaft 34 is sealed once by the packing seal assembly 1, and the main shaft 34 is then sealed twice by the nitrogen seal assembly 2. At the same time, the nitrogen seal assembly 2 can reduce the possibility of positive pressure gas carrying dust into the mechanical seal assembly 3, thereby improving the service life of the mechanical seal assembly 3. The mechanical seal assembly 3 seals the main shaft 34 three times. Through the combination of the three, the sealing performance of the main shaft 34 is greatly improved, and the overall service life is also improved.

[0027] The packing seal assembly 1 includes a packing housing 11, which is sleeved on the main shaft 34. The packing housing 11 is provided with a filling port 12 for online filling, which is convenient for online filling of the packing housing 11 with packing, thereby improving the sealing effect of the packing housing 11 on the main shaft 34. A plugging member 121 is connected to the packing housing 11, which is used to plug the filling port 12. The plugging member 121 can be a plugging cover threadedly connected to the packing housing 11. A cleaning groove is also provided on the packing housing 11, which is used to clean the packing, thereby facilitating the replacement of the packing and ensuring the sealing effect. A cleaning cover 13 is fixed to the packing housing 11 by bolts, which is convenient for closing the cleaning groove.

[0028] The mechanical seal assembly 3 includes a first connecting plate 31, a second connecting plate 32, a first sealing ring 33 and a second sealing ring 34. The first connecting plate 31 is connected to the packing housing 11, the second connecting plate 32 is connected to the main shaft 34, the first sealing ring 33 is connected to the first connecting plate 31, the second sealing ring 34 is connected to the second connecting plate 32, and the first sealing ring 33 abuts against the second sealing ring 34. A pressing plate 311 is fixedly connected to the first connecting plate 31 by bolts, and the pressing plate 311 abuts against the first sealing ring 33, so as to cooperate with the first connecting plate 31 to clamp the first sealing ring 33.

[0029] The mechanical seal assembly 3 further includes an adjustment sleeve 35, which is sleeved on the main shaft 34 and disposed between the second sealing ring 34 and the second connecting plate 32. An adjustment screw 351 is threadedly connected to the second connecting plate 32, and the adjustment screw 351 abuts against one end of the adjustment sleeve 35 away from the second sealing ring 34. A sliding groove 352 is provided in the adjustment sleeve 35 along the axial direction of the main shaft 34, and a push plate 353 and a compression spring 357 are provided in the sliding groove 352. The pressure plate 311 abuts against the second sealing ring 34, and the compression spring 357 abuts against one end of the pressure plate 311 away from the second sealing ring 34. By setting the adjusting screw 351, the compression spring 357 and the push plate 353, the adjusting screw 351 is convenient for adjusting the position of the adjusting sleeve 35, thereby controlling the extrusion force between the first sealing ring 33 and the second sealing ring 34, so as to achieve the purpose of adjusting the sealing effect between the first sealing ring 33 and the second sealing ring 34, and the compression spring 357 and the push plate 353 can continuously provide pressure to the second sealing ring 34 to ensure good sealing between the first sealing ring 33 and the second sealing ring 34, and at the same time can cooperate with the adjusting screw 351 to increase the pressure output to the second sealing ring 34, and because of the existence of the compression spring 357, there is a buffer space between the first sealing ring 33 and the second sealing ring 34, reducing the influence on the rotation of the first sealing ring 33 and the second sealing ring 34. There are multiple compression springs 357 along the circumferential array of the adjusting sleeve 35 to ensure the uniformity of the elastic force applied to the second sealing ring 34.

[0030] A first sealing groove 355 is provided on the side wall of the inner hole of the adjustment sleeve 35. A first sealing ring 354 is provided in the first sealing groove 355. The first sealing ring 354 abuts against the outer ring of the main shaft 34. The first sealing ring 354 facilitates improving the sealing between the adjustment sleeve 35 and the main shaft 34. The second connecting plate 32 is fixedly connected to the adjustment pin 321. The adjustment sleeve 35 is provided with an adjustment groove 356 for inserting the adjustment pin 321, so that the second connecting plate 32 can drive the adjustment sleeve 35 to rotate, and the adjustment sleeve 35 can move along the axial direction of the main shaft 34. There are multiple adjustment pins 321 arranged in a circumferential array along the adjustment sleeve 35. The second sealing ring 34 is provided with a second sealing groove 3533, and the second sealing ring 34 is provided in the second sealing groove 3533. The adjusting sleeve 35 is provided with a sealing portion 3531, and the second sealing ring 3532 is sleeved on the sealing portion 3531. The push plate 353 is provided with an extrusion portion, which is located in the second sealing groove 3533 and abuts against the second sealing ring 3532. Through the arrangement of the second sealing ring 3532, the second sealing groove 3533 and the sealing portion 3531, the second sealing ring 3532 can increase the sealing performance between the second sealing ring 34 and the adjusting sleeve 35. At the same time, when pressure is applied to the adjusting screw 351, the sealing portion 3531 will also increase the extrusion force on the second sealing ring 3532, thereby improving the sealing performance between the second sealing ring 34 and the adjusting sleeve 35. At the same time, the sealing portion 3531 cooperates with the push plate 353 to better support the second sealing ring 34, thereby reducing the possibility that the second sealing ring 34 tilts and affects the sealing performance. A buffer gap 341 is provided between the second sealing ring 34 and the adjusting sleeve 35 so that when the gap between the first sealing ring 33 and the second sealing ring 34 is too large, the second sealing ring 34 can avoid the first sealing ring 33, thereby increasing the service life of the first sealing ring 33 and the second sealing ring 34.

[0031] The nitrogen sealing assembly 2 comprises a nitrogen sealing shell 21 , which is sleeved on the main shaft 34 and located between the mechanical sealing assembly 3 and the packing shell 11 . The nitrogen sealing shell 21 is provided with a charging port 211 .

[0032] Working principle: By arranging bearings at both ends of the main shaft 34, the stability of the rotation of the main shaft 34 can be greatly improved, and the vibration of the main shaft 34 during rotation can be reduced, so that the gap between the drying cylinder 3 and the main shaft 34 is always maintained in a small and uniform state, so as to achieve the purpose of reducing leakage.

[0033] The multi-stage sealing structure realizes multiple sealings. The main shaft 34 is sealed once by the packing sealing component 1, and the main shaft 34 is further sealed by the nitrogen sealing component 2. At the same time, the nitrogen sealing component 2 can reduce the possibility of positive pressure gas carrying dust into the mechanical sealing component 3, thereby improving the service life of the mechanical sealing component 3. The mechanical sealing component 3 seals the main shaft 34 three times. Through the combination of the three, the sealing performance of the main shaft 34 is greatly improved, and the overall service life is also improved.

[0034] The mechanical seal assembly 3 promotes sealing by setting the adjusting screw 351, the compression spring 357 and the push plate 353. The adjusting screw 351 is convenient for adjusting the position of the adjusting sleeve 35, thereby controlling the extrusion force between the first sealing ring 33 and the second sealing ring 34, so as to achieve the purpose of adjusting the sealing effect between the first sealing ring 33 and the second sealing ring 34. The compression spring 357 and the push plate 353 can continuously provide pressure to the second sealing ring 34 to ensure good sealing between the first sealing ring 33 and the second sealing ring 34, and at the same time can cooperate with the adjusting screw 351 to increase the pressure output to the second sealing ring 34. Due to the existence of the compression spring 357, there is a buffer space between the first sealing ring 33 and the second sealing ring 34, which reduces the influence on the rotation of the first sealing ring 33 and the second sealing ring 34.

[0035] In addition, through the arrangement of the second sealing ring 3532, the second sealing groove 3533 and the sealing portion 3531, the second sealing ring 3532 can increase the sealing performance between the second sealing ring 34 and the adjusting sleeve 35. At the same time, when the adjusting screw 351 is pressed, the sealing portion 3531 will also increase the extrusion force on the second sealing ring 3532, thereby simultaneously improving the sealing performance between the second sealing ring 34 and the adjusting sleeve 35. At the same time, the sealing portion 3531 cooperates with the push plate 353 to better support the second sealing ring 34, thereby reducing the possibility that the second sealing ring 34 tilts and affects the sealing performance. The buffer gap 341 between the second sealing ring 34 and the adjusting sleeve 35 facilitates the second sealing ring 34 to avoid the first sealing ring 33 when the gap between the first sealing ring 33 and the second sealing ring 34 is too large, thereby improving the service life of the first sealing ring 33 and the second sealing ring 34.

[0036] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A chlorosilane slurry dryer, characterized in that: It comprises a drying cylinder (3) and a main shaft (34), wherein the main shaft (34) is rotatably connected to the drying cylinder (3), and a portion of the main shaft (34) extends out of the drying cylinder (3) and is connected to a multi-stage sealing structure; The multi-stage sealing structure comprises a packing seal assembly (1), a nitrogen sealing assembly (2) and a mechanical seal assembly (3) which are arranged in sequence and disposed on a main shaft (34); the packing seal assembly (1) comprises a packing shell (11) and a sealing member (121); the packing shell (11) is sleeved on the main shaft (34); a filling port (12) for online filling is provided on the packing shell (11); and the sealing member (121) is arranged on the packing shell (11) and is used to seal the filling port (12).

2. The chlorosilane slurry dryer according to claim 1, characterized in that: The packing shell (11) is provided with a cleaning cover (13), and the cleaning cover (13) is connected to the packing shell (11) via bolts.

3. The chlorosilane slurry dryer according to claim 1, characterized in that: The nitrogen sealing assembly (2) comprises a nitrogen sealing shell (21), which is sleeved on the main shaft (34) and located between the mechanical sealing assembly (3) and the packing shell (11), and a charging port (211) is provided on the nitrogen sealing shell (21).

4. The chlorosilane slurry dryer according to claim 1, characterized in that: The mechanical seal assembly (3) comprises a first connecting plate (31), a second connecting plate (32), a first sealing ring (33) and a second sealing ring (34); the first connecting plate (31) is connected to the packing housing (11); the second connecting plate (32) is connected to the main shaft (34); the first sealing ring (33) is connected to the first connecting plate (31); the second sealing ring (34) is connected to the second connecting plate (32); and the first sealing ring (33) abuts against the second sealing ring (34).

5. The chlorosilane slurry dryer according to claim 4, characterized in that: The mechanical seal assembly (3) further comprises an adjusting sleeve (35), wherein the adjusting sleeve (35) is sleeved on the main shaft (34), the second sealing ring (34) is connected to the adjusting sleeve (35), an adjusting screw (351) is threadedly connected to the second connecting plate (32), and the adjusting screw (351) abuts against one end of the adjusting sleeve (35) away from the second sealing ring (34).

6. The chlorosilane slurry dryer according to claim 5, characterized in that: A sliding groove (352) is provided in the adjusting sleeve (35) along the axial direction of the main shaft (34), a push plate (353) and a compression spring (357) are provided in the sliding groove (352), the pressing plate (311) abuts against the second sealing ring (34), and the compression spring (357) abuts against one end of the pressing plate (311) away from the second sealing ring (34).

7. The chlorosilane slurry dryer according to claim 6, characterized in that: A first sealing groove (355) is provided on the side wall of the inner hole of the adjustment sleeve (35), a first sealing ring (354) is provided in the first sealing groove (355), and the first sealing ring (354) abuts against the outer ring of the main shaft (34); The second sealing ring (34) is provided with a second sealing groove (3533), and a second sealing ring (34) is provided in the second sealing groove (3533). The adjusting sleeve (35) is provided with a sealing portion (3531), and the second sealing ring (3532) is sleeved on the sealing portion (3531). The push plate (353) is provided with an extrusion portion, and the extrusion portion is located in the second sealing groove (3533) and abuts against the second sealing ring (3532).

8. The chlorosilane slurry dryer according to claim 4, characterized in that: A pressing plate (311) is connected to the first connecting plate (31), the pressing plate (311) abuts against the first sealing ring (33), and a portion of the first sealing ring (33) is located between the pressing plate (311) and the first connecting plate (31).

9. The chlorosilane slurry dryer according to claim 1, characterized in that: The drying cylinder (3) is provided with a protective cover (31), and the protective cover (31) is provided on the multi-stage sealing structure and the main shaft (34).

10. The chlorosilane slurry dryer according to claim 9, characterized in that: The protective cover (31) is connected to a bearing seat (32), and the bearing seat (32) realizes relative rotation with the main shaft (34) through a bearing. The bearing seat (32) is connected to a shaft end retaining ring (33), and the shaft end retaining ring (33) abuts against the bearing.

Images