intermediate support for screw unloader

Abstract

This application relates to the field of screw unloaders, and in particular to an intermediate support for a screw unloader, comprising a cylinder, a connecting shaft, an outer bearing housing, an inner bearing housing, and a limiting bearing. One end of the cylinder is connected to the outer tube of a vertical screw. The outer bearing housing is connected to the inner wall of the cylinder, and a constraint ball cavity is formed on the surface of the outer bearing housing for the inner bearing housing to rotate. The axis of the constraint ball cavity coincides with the axis of the cylinder. The outer ring of the limiting bearing is coaxially connected to the inner wall of the inner bearing housing, and the inner ring of the limiting bearing is coaxially connected to the outer circumferential surface of the connecting shaft. The connecting shaft is connected to the screw body of the vertical screw. The arrangement of the cylinder, connecting shaft, outer bearing housing, inner bearing housing, and limiting bearing in this application reduces equipment vibration and abnormal noise through the internal constraint structure of the connecting shaft. Furthermore, rolling friction replaces sliding friction, reducing wear on the screw body, achieving minimal or no maintenance for the intermediate support, improving the reliability and practicality of the screw unloader, and extending the service life of the screw body and the intermediate support.

Description

Technical Field

[0001] This application relates to the field of screw unloaders, and more particularly to an intermediate support for screw unloaders. Background Technology

[0002] A screw unloader is a ship unloading equipment that uses the mechanical rotation of a screw mechanism to continuously unload bulk materials from ships. Its core structure consists of a vertical screw, a horizontal screw, a gantry, and a turntable. It features high efficiency, environmental friendliness, and strong adaptability, and is widely used in industries such as ports, power, chemicals, and food.

[0003] In the existing technology, the intermediate support of the screw unloader uses an externally constrained screw body. The outer surface of the screw body is prone to wear after long-term operation. Without long-term maintenance, large gaps can easily form in the intermediate support, causing vibration and abnormal noise, thereby reducing the service life of the intermediate support. Utility Model Content

[0004] To improve the service life of intermediate supports, this application provides an intermediate support for a screw unloader.

[0005] This application provides an intermediate support for a screw unloader, which adopts the following technical solution: An intermediate support for a spiral unloader includes a cylinder, a connecting shaft, an outer bearing housing, an inner bearing housing, and a limiting bearing. One end of the cylinder along its axial direction is connected to a vertical spiral outer tube. The outer bearing housing is connected to the inner wall of the cylinder. A constraint ball cavity for the inner bearing housing to rotate is formed on the surface of the outer bearing housing. The axis of the constraint ball cavity coincides with the axis of the cylinder. The outer ring of the limiting bearing is coaxially connected to the inner wall of the inner bearing housing. The inner ring of the limiting bearing is coaxially connected to the outer circumferential surface of the connecting shaft. The connecting shaft is connected to the spiral body of the vertical spiral.

[0006] By adopting the above technical solution, when the intermediate support is in use, one end of the cylindrical component along the axial direction is installed with the vertical spiral outer tube, the connecting shaft is used for the installation of the spiral body of the vertical spiral, the inner bearing seat rotates within the constrained spherical cavity, and the outer bearing seat and the inner bearing seat combine to form a spherical pair. The three degrees of freedom of the spherical pair improve the installation accuracy of the intermediate support and reduce the installation difficulty of the intermediate support; at the same time, the four degrees of freedom of the connecting shaft constrained by the inner bearing seat improve the stability of the equipment and reduce the probability of vibration of the equipment. The internal constraint structure of the connecting shaft reduces the vibration and abnormal noise of the equipment; and rolling friction replaces sliding friction, reducing the wear on the spiral body, achieving minimal or no maintenance for the intermediate support, improving the reliability and practicality of the spiral unloader, and extending the service life of the spiral body and the intermediate support.

[0007] Optionally, the cylindrical component includes a cylindrical body, a circular flange, and a reinforcing rib. The inner ring wall of the circular flange is coaxially connected to the outer circumferential surface of the cylindrical body. The circular flange is for mounting a vertical spiral outer tube. The outer bearing seat is located on the inner wall of the cylindrical body. The reinforcing rib is connected between the circular flange and the cylindrical body.

[0008] By adopting the above technical solution, the inner ring wall of the round flange is coaxially connected to the outer circumferential surface of the cylinder, and the reinforcing rib is located between the round flange and the cylinder. The reinforcing rib is used to strengthen the structural strength between the round flange and the cylinder, thereby extending the service life of the cylinder.

[0009] Optionally, the cylindrical component further includes a flange. The surface of the cylindrical body has a mounting hole for mounting the outer bearing seat. The axis of the mounting hole is perpendicular to the axis of the cylindrical body, and the mounting hole extends through both sides of the cylindrical body along its own axis. The flange is connected to the outer wall of the cylindrical body, and the axis of the flange coincides with the axis of the mounting hole. The outer bearing seat includes a support shaft, an outer seat, and a fixed flange. The support shaft is coaxially connected to the inner wall of the mounting hole. The fixed flange is connected between the support shaft and the flange. The surface of the support shaft has a rotating arc hole for rotating the outer seat. The axis of the rotating arc hole coincides with the axis of the cylindrical body, and the constrained ball cavity is located on the outer seat. The outer seat includes a seat body one and a seat body two, which are spliced ​​and fixed to form the outer seat.

[0010] By adopting the above technical solution, the support shaft is coaxially fixed to the inner wall of the mounting hole, and the fixing flange is connected between the support shaft and the flange, realizing the detachable installation between the outer bearing seat and the cylinder. At the same time, the outer seat is designed in sections, with seat body one and seat body two spliced ​​and fixed to form the outer seat, thereby simplifying the process of replacing and repairing the intermediate support components and improving the ease of use of the intermediate support.

[0011] Optionally, the inner bearing housing includes an upper bearing housing and a lower bearing housing, which are spliced ​​and fixed together to form the inner bearing housing.

[0012] By adopting the above technical solution, the inner bearing housing is designed in a split manner, and the upper bearing housing and the lower bearing housing are spliced ​​together to form the inner bearing housing, which further simplifies the process of replacing and repairing the intermediate support components, thereby improving the ease of use of the intermediate support.

[0013] Optionally, the connecting shaft includes a connecting flange and a half-shaft flange. The connecting flange is coaxially fixed to the end face of the half-shaft flange by a key and thread engagement, and the half-shaft flange is coaxially connected to the inner ring wall of the limit bearing.

[0014] By adopting the above technical solution, the connecting flange is coaxially installed on the end face of the half-shaft flange through a key and thread combination, and the half-shaft flange is installed on the inner ring wall of the limit bearing, constraining the four degrees of freedom of the connecting shaft. The above internal constraint structure can reduce the vibration and abnormal noise of the intermediate support, thereby improving the service life of the intermediate support.

[0015] Optionally, the inner bearing housing is connected to at least two oil seals, with each of the at least two oil seals being embedded in the inner cavity of the inner bearing housing. The at least two oil seals are located on both sides of the axis of the limiting bearing, and the outer circumferential surface of the connecting shaft and the inner wall of the inner bearing housing abut against both sides of the oil seals to form a seal.

[0016] By adopting the above technical solution, the two oil seals are located on both sides of the axial direction of the limiting bearing, and the outer circumferential surface of the connecting shaft and the inner wall of the inner bearing housing abut against the two sides of the oil seal to form a seal, thereby achieving a double sealing barrier for the inner cavity of the inner bearing housing. This effectively prevents external debris from entering the inner bearing housing and interfering with the limiting bearing, protecting the limiting bearing from contamination and corrosion, and thus extending the service life of the bearing.

[0017] Optionally, the end face of the support shaft protruding from the cylinder is provided with a lubricating oil passage, the lubricating oil passage is connected to the rotating arc hole, the surface of the outer seat facing the lubricating oil passage is provided with an oil injection hole, the oil injection hole is connected to the constrained ball cavity, and the surface of the inner bearing seat facing the oil injection hole is provided with an oil inlet hole, the oil inlet hole is connected to the inner cavity of the inner bearing seat.

[0018] By adopting the above technical solution, the lubricating oil enters the inner cavity of the inner bearing housing through the lubrication oil passage, oil injection hole and oil inlet hole in sequence to lubricate the limit bearing and improve the stability of the limit bearing operation.

[0019] Optionally, a sealing ring is embedded on the surface of the inner bearing housing facing the oil inlet hole, the inner wall of the sealing ring surrounds the oil inlet hole, and the outer circumferential surface of the inner bearing housing and the inner wall of the constrained ball cavity abut against both sides of the sealing ring to form a seal.

[0020] By adopting the above technical solution, the inner wall of the sealing ring surrounds the oil inlet hole, and the outer surface of the inner bearing housing and the inner wall of the constrained ball cavity abut against both sides of the sealing ring to form a seal, making it difficult for the lubricating oil in the oil inlet hole to overflow from the constrained ball cavity, thereby ensuring the stability of oil injection into the oil inlet hole.

[0021] Optionally, a support cover is also included, which is connected between the support shaft and the cylinder and seals the mounting hole, and the support cover is located on the side of the support shaft away from the fixed flange in the axial direction of the support shaft.

[0022] By adopting the above technical solution, one end of the support shaft along the axial direction is installed with the flange via a fixed flange, and the other end of the support shaft along the axial direction is installed with the cylinder via a support cover, thereby fixing both ends of the support shaft along the axial direction and making it less likely for the support shaft to shift within the mounting hole, thus improving the stability of the connection between the support shaft and the inner wall of the mounting hole.

[0023] Optionally, the cylinder is connected to a window cover, and a viewing groove is provided on the surface of the cylinder for the window cover to be inserted. The viewing groove communicates with the inner cavity of the cylinder, and the outer peripheral surface of the window cover abuts against the inner wall of the viewing groove and seals the viewing groove.

[0024] By adopting the above technical solution, when it is necessary to observe the condition of the support shaft, the window cover can be removed, and the sealing effect of the window cover on the viewing slot will disappear. The staff can then observe the condition of the inner cavity of the cylinder through the viewing slot, further improving the ease of use of the intermediate support.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The design of the cylinder, connecting shaft, outer bearing housing, inner bearing housing, and limit bearing reduces equipment vibration and abnormal noise through the internal constraint structure of the connecting shaft. Rolling friction replaces sliding friction, reducing wear on the auger body, achieving minimal or no maintenance for the intermediate support, improving the reliability and practicality of the auger unloader, and extending the service life of the auger body and intermediate support. 2. The installation of the cylinder body, round flange, and reinforcing ribs: the reinforcing ribs are used to strengthen the structural strength between the round flange and the cylinder body, thereby extending the service life of the cylinder components; 3. The design of the support shaft, outer seat, and fixed flange simplifies the process of replacing and maintaining intermediate support components, and improves the ease of use of the intermediate support. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application.

[0027] Figure 2 This is a schematic diagram of the overall structure of the cylindrical component in an embodiment of this application.

[0028] Figure 3 This is a schematic diagram of the overall structure of the outer bearing housing in an embodiment of this application.

[0029] Figure 4 This is a schematic diagram of the overall structure of the inner bearing housing in an embodiment of this application.

[0030] Figure 5 This is a schematic diagram of the overall structure of the connecting shaft in an embodiment of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Cylindrical component; 11. Cylindrical body; 111. Mounting hole; 112. Visible slot; 12. Round flange; 13. Clamping ring; 14. Reinforcing rib; 15. Method flange; 2. Connecting shaft; 21. Connecting flange; 22. Half-shaft flange; 23. Key; 3. Outer bearing housing; 31. Support shaft; 311. Support half-shaft one; 312. Support half-shaft two; 313. Rotating arc hole; 314. Lubrication oil passage; 3 2. Outer seat; 321. Seat body one; 322. Seat body two; 323. Constraint ball cavity; 324. Oil injection hole; 33. Fixed flange; 34. Handle one; 4. Inner bearing seat; 41. Upper bearing seat; 42. Lower bearing seat; 43. Limiting ring cavity; 44. Oil inlet hole; 5. Limiting bearing; 6. Support cover; 61. Half shaft seat; 62. Support flange; 63. Handle two; 7. Window cover; 8. Oil seal; 9. Sealing ring. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0033] This application discloses an intermediate support for a screw unloader. (Refer to...) Figure 1 and Figure 2 The intermediate support for the spiral unloader includes a cylinder 1, a connecting shaft 2, an outer bearing seat 3, an inner bearing seat 4, a limit bearing 5, and a support cover 6. The cylinder 1 includes a cylinder body 11, a circular flange 12, a clamping ring 13, reinforcing ribs 14, and a flange 15. The inner ring wall of the circular flange 12 is coaxially fixed to the outer circumference of the cylinder body 11. The circular flange 12 is installed and fixed to the vertical spiral outer tube by bolts. The number of reinforcing ribs 14 can be one, two, or more. In this embodiment, there are multiple reinforcing ribs 14. The reinforcing ribs 14 are connected between the circular flange 12 and the cylinder body 11, and the multiple reinforcing ribs 14 are evenly distributed around the axis of the cylinder body 11, increasing the structural strength between the circular flange 12 and the cylinder body 11, thereby extending the service life of the cylinder 1.

[0034] Reference Figure 1 and Figure 2 The side wall of the cylinder 11 has a mounting hole 111 for installing the outer bearing seat 3. The axis of the mounting hole 111 is perpendicular to the axis of the cylinder 11, and the mounting hole 111 passes through both sides of the cylinder 11 along its own axis. The flange 15 is fixed to the side wall of the cylinder 11, and the axis of the flange 15 coincides with the axis of the mounting hole 111. The clamp ring 13 is coaxially connected to the side of the cylinder 11 away from the round flange 12, and the cylinder 11 fixes the vertical screw to the screw unloader through the clamp ring 13.

[0035] Reference Figure 1 and Figure 2The side wall of the cylinder 11 is provided with a viewing groove 112, which connects to the inner cavity of the cylinder 11. A window cover 7 that closes the viewing groove 112 is fixed to the surface of the cylinder 11 by bolts. The staff can observe the installation of the bearing seat 3 outside the inner cavity of the cylinder 11 through the viewing groove 112. In addition, an adjustment shim is embedded between the window cover 7 and the cylinder 11, so that impurities are not easy to enter the inner cavity of the cylinder 11 through the viewing groove 112 from the tight fit between the window cover 7 and the cylinder 11, thereby improving the stability of the window cover 7 in sealing the viewing groove 112.

[0036] Reference Figure 1 and Figure 3 The outer bearing housing 3 includes a support shaft 31, an outer seat 32, a fixed flange 33, and a handle 34. The support shaft 31 includes a support half shaft 311 and a support half shaft 312. The ends of the support half shaft 311 and the support half shaft 312 are coaxially fixed to form the support shaft 31. The support shaft 31 is coaxially embedded in the mounting hole 111. The ends of the support half shaft 311 and the support half shaft 312 that are far apart from each other protrude from the side wall of the cylinder 11.

[0037] Reference Figure 1 and Figure 3 The end of the supporting half shaft 311, which is away from the supporting half shaft 312, protrudes from the end face of the flange 15 and is coaxially fixed with the fixed flange 33. The fixed flange 33 is fixed to the flange 15 by bolts, and the handle 34 is fixed to the surface of the fixed flange 33 away from the flange 15.

[0038] Reference Figure 3 and Figure 4 The outer seat 32 includes a seat body 1 321 and a seat body 2 322. The seat body 1 321 is spliced ​​and fixed with the seat body to form the outer seat 32. A rotating arc hole 313 is left between the supporting half shaft 1 311 and the supporting half shaft 2 312 for the outer seat 32 to rotate. The axis of the rotating arc hole 313 coincides with the axis of the cylinder 11. The outer seat 32 is coaxially provided with a constraint ball cavity 323 for the inner bearing seat 4 to rotate. The inner bearing seat 4 includes an upper bearing seat 41 and a lower bearing seat 42. The upper bearing seat 41 and the lower bearing seat 42 are spliced ​​and fixed to form the inner bearing seat 4. The inner wall of the inner bearing seat 4 is coaxially provided with a limiting ring cavity 43 for the limiting bearing 5 to be embedded. The outer ring wall of the limiting bearing 5 abuts against the inner wall of the limiting ring cavity 43, and the inner ring of the limiting bearing 5 is coaxially embedded with the connecting shaft 2.

[0039] Reference Figure 1 and Figure 3The end of the supporting half shaft 311 protruding from the fixed flange 33 is provided with a lubrication oil passage 314, which is connected to the rotating arc hole 313. The outer seat 32 is provided with an oil injection hole 324 on the surface facing the lubrication oil passage 314, which is connected to the constraint ball cavity 323. The inner bearing seat 4 is provided with an oil inlet hole 44 on the surface facing the oil injection hole 324, which is connected to the limiting ring cavity 43. The oil flows through the lubrication oil passage 314, the oil injection hole 324 and the oil inlet hole 44 in sequence and enters the limiting ring cavity 43 to lubricate the limiting bearing 5 and extend the service life of the limiting bearing 5.

[0040] Reference Figure 1 and Figure 3 The inner bearing housing 4 is equipped with at least two oil seals 8. In this embodiment, there are four oil seals 8. Two oil seals 8 form a group. The two groups of oil seals 8 are embedded in the inner cavity of the inner bearing housing 4 in a one-to-one correspondence. The two groups of oil seals 8 are located at both ends of the axis of the limiting bearing 5. The outer circumferential surface of the connecting shaft 2 and the inner wall of the inner bearing housing 4 abut against both sides of the oil seals 8 to form a seal, thereby achieving stable storage of oil in the limiting ring cavity 43.

[0041] Reference Figure 1 and Figure 3 A sealing ring 9 is embedded on the surface of the inner bearing housing 4 facing the oil inlet 324. The material of the sealing ring 9 can be rubber or silicone. In this embodiment, the material of the sealing ring 9 is rubber, which has a certain deformation capability. The inner wall of the sealing ring 9 surrounds the oil inlet 44, and the outer surface of the inner bearing and the inner wall of the constraint ball cavity 323 are respectively pressed against the two sides of the sealing ring 9 in the axial direction to form a seal, so that the oil in the oil inlet 324 is not easy to overflow from the constraint ball cavity 323, thereby improving the stability of oil injection into the oil inlet 44.

[0042] Reference Figure 1 and Figure 5 The connecting shaft 2 includes a connecting flange 21 and a half-shaft flange 22. The connecting flange 21 is coaxially fixed to the end face of the half-shaft flange 22 by a key 23 and a threaded connection. The half-shaft flange 22 is coaxially connected to the inner ring wall of the limit bearing 5. The half-shaft flange 22 is installed and fixed to the helical body of the vertical helix by a bolt pair.

[0043] Reference Figure 1 The support cover 6 includes a half-shaft seat 61, a support flange 62, and a handle 63. One end of the support flange 62 is fixed to the end face of the handle 63 along the axial direction, and the other end of the support flange 62 is fixed to the half-shaft seat 61 along the axial direction. The half-shaft seat 61 is coaxially fixed to the end of the support half-shaft 312 that protrudes from the cylinder 11. The support flange 62 is fixed to the side wall of the cylinder 11 by bolts.

[0044] The implementation principle of an intermediate support for a screw unloader according to an embodiment of this application is as follows: the outer bearing housing 3 and the inner bearing housing 4 are combined to form a spherical pair. The three degrees of freedom of the spherical pair improve the installation accuracy of the intermediate support and reduce the installation difficulty. The four degrees of freedom of the connecting shaft 2 are constrained to improve the stability of the equipment and reduce equipment vibration. The disconnected design of the connecting shaft 2 enhances the stability of the bearing. Both the outer bearing housing 3 and the inner bearing housing 4 are designed in a split manner to simplify the process of component replacement and maintenance of the intermediate support. The internal constraint structure can reduce the vibration and abnormal noise of the equipment. Rolling friction replaces sliding friction, reducing the wear on the screw body and achieving low-maintenance or maintenance-free operation of the intermediate support. This improves the reliability and practicality of the screw unloader and extends the service life of the screw body and the intermediate support.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A central support for a screw unloader, characterized in that: The assembly includes a cylindrical component (1), a connecting shaft (2), an outer bearing seat (3), an inner bearing seat (4), and a limiting bearing (5). One end of the cylindrical component (1) along its axial direction is connected to a vertical spiral outer tube. The outer bearing seat (3) is connected to the inner wall of the cylindrical component (1). The surface of the outer bearing seat (3) has a constraint ball cavity (323) for the inner bearing seat (4) to rotate. The axis of the constraint ball cavity (323) coincides with the axis of the cylindrical component (1). The outer ring of the limiting bearing (5) is coaxially connected to the inner wall of the inner bearing seat (4). The inner ring of the limiting bearing (5) is coaxially connected to the outer circumferential surface of the connecting shaft (2). The connecting shaft (2) is connected to the spiral body of the vertical spiral.

2. The intermediate support for the screw unloader according to claim 1, characterized in that: The cylindrical component (1) includes a cylindrical body (11), a circular flange (12), and a reinforcing rib (14). The inner ring wall of the circular flange (12) is coaxially connected to the outer circumferential surface of the cylindrical body (11). The circular flange (12) is used for the installation of a vertical spiral outer tube. The outer bearing seat (3) is located on the inner wall of the cylindrical body (11). The reinforcing rib (14) is connected between the circular flange (12) and the cylindrical body (11).

3. The intermediate support for the screw unloader according to claim 2, characterized in that: The cylindrical component (1) also includes a flange (15). The surface of the cylindrical body (11) has a mounting hole (111) for installing the outer bearing seat (3). The axis of the mounting hole (111) is perpendicular to the axis of the cylindrical body (11), and the mounting hole (111) extends along its own axis through both sides of the cylindrical body (11). The flange (15) is connected to the outer wall of the cylindrical body (11), and the axis of the flange (15) coincides with the axis of the mounting hole (111). The outer bearing seat (3) includes a support shaft (31), an outer seat (32), and a fixing flange (33). The support shaft ( 31) Coaxially connected to the inner wall of the mounting hole (111), the fixed flange (33) is connected between the support shaft (31) and the flange (15), the surface of the support shaft (31) is provided with a rotating arc hole (313) for the outer seat (32) to rotate, the axis of the rotating arc hole (313) coincides with the axis of the cylinder (11), and the constrained ball cavity (323) is located on the outer seat (32). The outer seat (32) includes a seat body one (321) and a seat body two (322), and the seat body one (321) and the seat body two (322) are spliced ​​and fixed to form the outer seat (32).

4. The intermediate support for the screw unloader according to claim 1, characterized in that: The inner bearing housing (4) includes an upper bearing housing (41) and a lower bearing housing (42), which are spliced ​​and fixed together to form the inner bearing housing (4).

5. The intermediate support for the screw unloader according to claim 1, characterized in that: The connecting shaft (2) includes a connecting flange (21) and a half-shaft flange (22). The connecting flange (21) is coaxially fixed to the end face of the half-shaft flange (22) by a key (23) and a threaded connection, and the half-shaft flange (22) is coaxially connected to the inner ring wall of the limit bearing (5).

6. The intermediate support for the screw unloader according to claim 1, characterized in that: The inner bearing housing (4) is connected to at least two oil seals (8), and the at least two oil seals (8) are embedded in the inner cavity of the inner bearing housing (4) in a one-to-one correspondence. The at least two oil seals (8) are located on both sides of the axis of the limiting bearing (5), and the outer peripheral surface of the connecting shaft (2) and the inner wall of the inner bearing housing (4) abut against the two sides of the oil seals (8) to form a seal.

7. The intermediate support for the screw unloader according to claim 3, characterized in that: The support shaft (31) has a lubrication oil passage (314) on the end face of the protruding cylinder (11). The lubrication oil passage (314) is connected to the rotating arc hole (313). The outer seat (32) has an oil injection hole (324) on the surface facing the lubrication oil passage (314). The oil injection hole (324) is connected to the constrained ball cavity (323). The inner bearing seat (4) has an oil inlet hole (44) on the surface facing the oil injection hole (324). The oil inlet hole (44) is connected to the inner cavity of the inner bearing seat (4).

8. The intermediate support for the screw unloader according to claim 7, characterized in that: The inner bearing housing (4) has a sealing ring (9) embedded on its surface facing the oil injection hole (324). The inner wall of the sealing ring (9) surrounds the oil inlet hole (44), and the outer circumferential surface of the inner bearing housing (4) and the inner wall of the constrained ball cavity (323) abut against both sides of the sealing ring (9) to form a seal.

9. The intermediate support for the screw unloader according to claim 3, characterized in that: It also includes a support cover (6), which is connected between the support shaft (31) and the cylinder (11) and closes the mounting hole (111), and the support cover (6) is located on the side of the support shaft (31) away from the fixed flange (33) in the axial direction.

10. The intermediate support for the screw unloader according to claim 2, characterized in that: The cylinder (11) is connected to a window cover (7). A viewing groove (112) for the window cover (7) to be inserted is provided on the surface of the cylinder (11). The viewing groove (112) is connected to the inner cavity of the cylinder (11), and the outer peripheral surface of the window cover (7) abuts against the inner wall of the viewing groove (112) and closes the viewing groove (112).

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