CN-224212000-U - Star-shaped feeder capable of preventing leakage

CN224212000UCN 224212000 UCN224212000 UCN 224212000UCN-224212000-U

Abstract

The application provides a leakage-proof star feeder, which relates to the technical field of material conveying and comprises a shell, a rotating shaft, blades, a first sealing structure, a second sealing structure, a pressure measuring instrument and a pressure measuring instrument, wherein the upper part of the shell is provided with a feed inlet, the lower part of the shell is provided with a discharge outlet, the rotating shaft is transversely arranged in the shell, the end part of the rotating shaft is connected with the shell through a bearing, the blades are positioned between the feed inlet and the discharge outlet, one end of each blade is in sealing contact with the inner wall of the shell, the other end of each blade is in transmission connection with the rotating shaft, the blades are arranged at intervals along the circumferential direction of the rotating shaft, the first sealing structure is arranged between the rotating shaft and the shell and between the bearing and the blades, the second sealing structure is arranged between the rotating shaft and the shell and between the first sealing structure and the blades, and the pressure measuring instrument is communicated with the sealed cavity. Compared with the maintenance measures taken after the accident, the embodiment can detect the leakage risk in advance, and the accident that harmful gas leaks is avoided by adopting preventive maintenance measures.

Inventors

FENG YING
Jia hang
CHEN BO
QIU AIMIN
HE XIAODONG

Assignees

四川省科能工业设备制造有限公司

Dates

Publication Date: 20260508
Application Date: 20250530

Claims (10)

1. A leak-proof star feeder comprising: the upper part of the shell is provided with a feed inlet, and the lower part of the shell is provided with a discharge outlet; The rotating shaft is transversely arranged in the shell, and the end part of the rotating shaft is connected with the shell through a bearing; The blades are positioned between the feeding hole and the discharging hole, one end of each blade is in sealing contact with the inner wall of the shell, the other end of each blade is in transmission connection with the rotating shaft, and the blades are arranged at intervals along the circumferential direction of the rotating shaft; The first sealing structure is arranged between the rotating shaft and the shell and is positioned between the bearing and the blade; The second sealing structure is arranged between the rotating shaft and the shell and positioned between the first sealing structure and the blades, and a closed cavity is formed between the first sealing structure and the second sealing structure; And the pressure measuring instrument is communicated with the closed cavity.
2. The leak-proof star feeder of claim 1, wherein the second seal comprises a second seal ring.
3. The anti-leakage star feeder according to claim 2, wherein the second sealing structure further comprises a positioning sleeve, a central hole is formed in the positioning sleeve along the axial direction of the positioning sleeve, a storage groove is formed in one end of the positioning sleeve, the diameter of the storage groove is larger than that of the central hole, the central hole is communicated with the storage groove, the positioning sleeve is sleeved on the rotating shaft through the central hole, and the second sealing ring is arranged in the storage groove.
4. A leak-proof star feeder as defined in claim 3, wherein a plurality of said second seal rings are arranged at intervals along the axial direction of said positioning sleeve and adjacent second seal rings are separated by a retainer ring.
5. A leak-proof star feeder as defined in claim 3, further comprising a third seal disposed between the shaft and the housing and between the second seal and the vanes.
6. The leakproof star feeder of claim 5, wherein the third seal comprises a third seal ring, one side of the third seal ring is provided with a second opening with a V-shaped cross section, and one end of the second opening is narrowed, and the other end of the second opening is open.
7. The leakproof star feeder of claim 6 wherein the outer wall of the third seal ring has outwardly extending wings, the third seal further comprising a pressure ring connected to the housing, one end of the pressure ring having an annular projection, the end face of the annular projection being configured to compress the wings of the third seal ring against the end of the locating sleeve, the third seal ring being disposed between the annular projection and the shaft.
8. The leak-proof star feeder of claim 7, further comprising: A fixed plate fastened in the housing; the inner side of the arc-shaped movable plate is in sliding sealing contact with the end part of at least one blade, and the outer side of the arc-shaped movable plate is connected with the fixed plate through an elastic component; The movable plates are arranged on two opposite sides of the rotating shaft symmetrically, a first gap is reserved between the upper ends of the two movable plates, a second gap is reserved between the lower ends of the two movable plates, the first gap is communicated with the feeding hole in an aligned mode, and the second gap is communicated with the discharging hole in an aligned mode.
9. The leak-proof star feeder of claim 8, further comprising: the axial channel is arranged in the compression ring along the axial direction of the compression ring and is internally provided with a blocking plate; The radial channel is arranged in the pressure ring along the radial direction of the pressure ring, one end of the radial channel is communicated with the axial channel, and the other end of the radial channel extends to the outer wall of the pressure ring; The guide rod is provided with a piston which is in sliding sealing fit with the axial channel, one end of the radial channel is positioned between the piston and the blocking plate, and the guide rod penetrates through the blocking plate in a sliding sealing manner; The elastic strip is arranged at one end of the guide rod, and the end part of the elastic strip is in sliding contact with the inner wall of the second opening; a spring for moving the elastic strip toward an end where the second opening narrows; And one end of the movable column is contacted with the inner side of the movable plate, and the other end of the movable column stretches into the pressing ring and is in sliding sealing fit with the radial channel.
10. The leakage-proof star feeder according to claim 8 or 9, further comprising a movable side plate in a ring shape, wherein the movable side plate is sleeved on the rotating shaft, one side of the movable side plate is connected with the compression ring through a telescopic structure, a gap is formed between the movable side plate and the side surface of the blade, one side of the movable side plate faces the movable plate and is provided with an inclined surface, and the inner side of the movable plate is provided with a wedge-shaped block, and one side of the wedge-shaped block is inclined and is in sliding contact with the inclined surface.

Description

Star-shaped feeder capable of preventing leakage Technical Field The utility model relates to the technical field of material conveying, in particular to a leakage-proof star-shaped feeder. Background The star feeder mainly comprises an impeller, a shell, a speed reducer, a motor and other parts. The working principle is that the materials fall down and fill in the gaps between the adjacent blades of the impeller, and then the materials are discharged along with the rotation of the blades. When the star feeder is used in the production process of the polysilicon, the gas in the polysilicon production equipment has toxicity, so that the star feeder is subjected to strict requirements of no leakage and high air tightness. However, the existing star feeder still has leakage risk in actual use despite the sealing measures, and once leakage occurs, the existing star feeder can be only processed afterwards, and hysteresis exists, so that potential hidden danger is brought to the production process. Disclosure of utility model In view of the above, the utility model provides a leakage-proof star feeder, which aims to solve the technical problems that the prior star feeder still has leakage risk in actual use despite the adoption of sealing measures, and once leakage occurs, the leakage is often only treated afterwards, and hysteresis exists, so that potential hidden danger is brought to the production process. In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a leakproof star feeder, which comprises: the upper part of the shell is provided with a feed inlet, and the lower part of the shell is provided with a discharge outlet; The rotating shaft is transversely arranged in the shell, and the end part of the rotating shaft is connected with the shell through a bearing; The blades are positioned between the feed inlet and the discharge outlet, one end of each blade is in sealing contact with the inner wall of the shell, the other end of each blade is in transmission connection with the rotating shaft, and the blades are arranged at intervals along the circumferential direction of the rotating shaft; The first sealing structure is arranged between the rotating shaft and the shell and is positioned between the bearing and the blade; The second sealing structure is arranged between the rotating shaft and the shell and positioned between the first sealing structure and the blade; and the pressure measuring instrument is communicated with the closed cavity. In some embodiments of the utility model, the second sealing structure comprises a second sealing ring. In some embodiments of the utility model, the second sealing structure further comprises a positioning sleeve, a central hole is formed in the positioning sleeve along the axial direction of the positioning sleeve, a storage groove is formed in one end of the positioning sleeve, the diameter of the storage groove is larger than that of the central hole, the central hole is communicated with the storage groove, the positioning sleeve is sleeved on the rotating shaft through the central hole, and the second sealing ring is arranged in the storage groove. In some embodiments of the utility model, a plurality of second seal rings are spaced apart along the axial direction of the positioning sleeve and adjacent second seal rings are separated by a baffle ring. In some embodiments of the utility model, a third seal is also included and is disposed between the shaft and the housing and between the second seal and the vane. In some embodiments of the utility model, the third sealing structure comprises a third sealing ring, one side of the third sealing ring is provided with a second opening with a V-shaped cross section, and one end of the second opening is narrowed, and the other end of the second opening is open. In some embodiments of the utility model, the outer wall of the third sealing ring is provided with an outwardly extending wing part, the third sealing structure further comprises a compression ring, the compression ring is connected with the shell, one end of the compression ring is provided with an annular bulge, the end face of the annular bulge is used for tightly pressing the wing part of the third sealing ring on the end part of the positioning sleeve, and the third sealing ring is arranged between the annular bulge and the rotating shaft. In some embodiments of the utility model, further comprising: the fixed plate is fastened in the shell; The inner side of the arc-shaped movable plate is in sliding sealing contact with the end part of at least one blade, and the outer side of the arc-shaped movable plate is connected with the fixed plate through an elastic component; The movable plates are arranged on two opposite sides of the rotating shaft symmetrically, a first gap is reserved between the upper ends of the two movable plates, a second gap is reserved between the lowe