A screw feed mechanism

Abstract

The utility model discloses a spiral feeding mechanism, including the feeding cylinder and screw rod with the feed inlet and the discharge gate, be equipped with spiral blade on the screw rod, two sealing assemblies are detachably arranged respectively at both ends of the feeding cylinder, the screw rod rotatably arranged in the feeding cylinder and two sealing assemblies, and the both ends of screw rod respectively from the one end of two sealing assemblies away from the feeding cylinder stretch out, spiral blade is located in the feeding cylinder, and the outer periphery of feeding cylinder is equipped with the heat insulating part. The utility model can prevent the powder in the feeding cylinder from leaking out from both ends of the feeding cylinder, thereby can avoid polluting the external environment, and it is convenient for regularly replacing the sealing assembly, reduces the use cost, can play the protection effect to the operator simultaneously, avoids scalding.

Description

Technical Field

[0001] This utility model relates to the field of feeding machine technology, specifically to a spiral feeding mechanism. Background Technology

[0002] Screw feeders are common powder conveying mechanisms in industrial production.

[0003] Existing screw feeding mechanisms have a sealing component at only one end of the feeding cylinder. During operation, the powder inside the feeding cylinder usually leaks out from the other end, causing pollution to the external environment. Furthermore, the sealing component cannot be disassembled, so it cannot be replaced periodically. If the sealing component needs to be replaced, the sealing component and the feeding cylinder must be replaced together, which increases the operating cost. At the same time, since the screw feeding mechanism operates in a high-temperature environment, the temperature of the outer circumference of the feeding cylinder is relatively high, which can easily cause burns to the operators.

[0004] Therefore, there is an urgent need for an improved screw feeding mechanism to solve the above-mentioned technical problems. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides a spiral feeding mechanism that can prevent powder from leaking out from both ends of the feeding cylinder, thereby avoiding pollution of the external environment. It also facilitates the regular replacement of the sealing components, reducing the cost of use, and can protect operators from burns.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A spiral feeding mechanism includes a feeding cylinder with an inlet and an outlet and a screw. The screw is provided with spiral blades. Two sealing assemblies are detachably provided at both ends of the feeding cylinder. The screw is rotatably disposed in the feeding cylinder and the two sealing assemblies, and both ends of the screw extend from the ends of the two sealing assemblies away from the feeding cylinder. The spiral blades are located inside the feeding cylinder, and a heat insulation member is sleeved on the outer periphery of the feeding cylinder.

[0008] As a preferred technical solution, the sealing assembly includes a mounting component, a sealing plate, a first sealing gasket, a sealing filler, and a sealing bearing seat. One end of each mounting component of the two sealing assemblies is detachably disposed at both ends of the feeding cylinder. The sealing plate is detachably disposed at the other end of the mounting component. The screw is rotatably disposed within the feeding cylinder and the two mounting components, with both ends of the screw extending from through holes in the sealing plates of the two sealing assemblies. The first sealing gasket is sandwiched between one end of the mounting component and the corresponding end of the feeding cylinder. The sealing filler is located within the mounting component, with one end of the sealing filler abutting against the first sealing gasket. The sealing bearing seat is located within the mounting component and circumferentially disposed around the outer periphery of the screw. A bearing is disposed within the sealing bearing seat. The first sealing gasket, the sealing filler, and the bearing are all detachably sleeved around the outer periphery of the screw.

[0009] As a preferred technical solution, the sealing assembly further includes a second sealing gasket and an oil seal structure. The second sealing gasket is sandwiched between the sealing plate and the other end of the mounting component. The oil seal structure is located inside the mounting component and sandwiched between the sealing plate and the sealing bearing seat. The oil seal structure is detachably sleeved on the outer periphery of the screw and detachably mounted on the sealing plate. The second sealing gasket is circumferentially disposed on the outer periphery of the oil seal structure. The sealing bearing seat is detachably mounted on the oil seal structure.

[0010] As a preferred technical solution, the oil seal structure includes a skeleton oil seal and an oil seal baffle. The oil seal baffle is located inside the mounting component and sandwiched between the sealing plate and the sealing bearing seat. A first groove is provided at the end of the oil seal baffle away from the sealing bearing seat, and a second groove is provided at the end of the oil seal baffle near the sealing bearing seat. The second groove communicates with the first groove, and the inner diameter of the second groove is larger than the inner diameter of the first groove. The oil seal baffle is detachably fitted onto the outer periphery of the screw via the first and second grooves. The oil seal baffle is detachably mounted on the sealing plate. A baffle protrusion is provided at the end of the oil seal baffle near the sealing bearing seat. The baffle protrusion surrounds the second groove and is inserted into one end of the sealing bearing seat. A second sealing gasket is annularly disposed around the outer periphery of the oil seal baffle. The sealing bearing seat is detachably mounted on the oil seal baffle. The skeleton oil seal cooperates with the second groove and is detachably fitted onto the outer periphery of the screw.

[0011] As a preferred technical solution, an annular first mounting portion is formed on the outer wall of one end of the mounting component. The first mounting portion is provided with a first mounting hole, and the first sealing gasket is provided with a second mounting hole. Two annular feeding cylinder protrusions are formed on the outer walls of both ends of the feeding cylinder. The two feeding cylinder protrusions correspond to the first mounting portions of the two sealing components respectively. The feeding cylinder protrusions are provided with a third mounting hole. First mounting fasteners are installed in the first mounting hole of the first mounting portion, the second mounting hole of the first sealing gasket, and the corresponding third mounting hole of the feeding cylinder protrusion.

[0012] As a preferred technical solution, the outer wall of the other end of the mounting component is formed with an annular second mounting portion, the second mounting portion is provided with a first hole, the second sealing gasket is provided with a second hole, the sealing plate is provided with a third hole, and a second mounting fastener is installed in the first hole of the mounting component, the second hole of the second sealing gasket and the third hole of the sealing plate.

[0013] As a preferred technical solution, the oil seal baffle is provided with a first connecting hole, the sealing plate is provided with a second connecting hole, a first baffle fastener is installed in the first connecting hole of the oil seal baffle and the second connecting hole of the sealing plate, an annular bearing seat ring is formed on the outer wall of one end of the sealed bearing seat, the bearing seat ring is provided with a third connecting hole, and a second baffle fastener is installed in the first connecting hole of the oil seal baffle and the third connecting hole of the bearing seat ring.

[0014] As a preferred technical solution, the inner wall of the mounting component is formed with an annular limiting part, the limiting part is detachably sleeved on the outer periphery of the sealing packing, one end of the limiting part abuts against the first sealing gasket, the sealing assembly further includes a pressure block, the pressure block is located inside the mounting component and is annularly arranged on the outer periphery of the screw, the pressure block is located between the sealing packing and the sealing bearing seat and is detachably disposed on the limiting part, and the other end of the sealing packing abuts against the pressure block.

[0015] As a preferred technical solution, the heat insulation component includes a shell, which is fitted around the outer periphery of the feeding cylinder. The shell is filled with heat insulation material, and the end of the inlet away from the feeding cylinder and the end of the outlet away from the feeding cylinder extend out of the shell, respectively.

[0016] As a preferred technical solution, the screw and the helical blades are integrally formed.

[0017] The beneficial effects of this utility model are as follows: By detachably installing two sealing components at both ends of the feeding cylinder, this utility model can prevent the powder inside the feeding cylinder from leaking out from both ends of the feeding cylinder, thereby avoiding pollution of the external environment. It also facilitates the periodic replacement of the sealing components, eliminating the need to replace the sealing components and the feeding cylinder together, thus reducing the cost of use. At the same time, the heat insulation component installed on the outer periphery of the feeding cylinder can isolate the temperature inside the feeding cylinder from the external environment, thus protecting the operator and preventing burns. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of a spiral feeding mechanism provided in an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A cross-sectional schematic diagram of the screw feeding mechanism shown;

[0021] Figure 3 yes Figure 2 A magnified view of a portion at point A shown;

[0022] Figure 4 yes Figure 1 An exploded schematic diagram of the screw feeder mechanism shown.

[0023] Figure 5 yes Figure 1 The diagram shows the structure of the spiral feeding mechanism after removing one of the sealing plates.

[0024] Figure 6 yes Figure 1 A schematic diagram of the mounting components of the screw feeding mechanism shown;

[0025] Figure 7 yes Figure 1 A schematic diagram of the sealing packing and pressure block of the screw feeding mechanism shown;

[0026] Figure 8 yes Figure 1 An exploded view of the skeleton oil seal and oil seal baffle of the spiral feeding mechanism shown.

[0027] Figure label:

[0028] 10. Feeding cylinder; 11. Inlet; 12. Outlet; 13. Outer shell; 131. First through hole; 132. Second through hole; 133. Insulation material; 14. Feeding cylinder protrusion; 141. Third mounting hole; 20. Sealing assembly; 21. Mounting component; 211. Limiting part; 2111. Limiting part mounting hole; 212. First mounting part; 2121. First mounting hole; 213. Second mounting part; 2131. First hole position; 22. Sealing plate; 221. Through hole of sealing plate; 222. Second connecting hole; 23. First sealing gasket; 24. Sealing filler; 2 5. Pressure block; 251. Pressure block ring; 26. Second sealing gasket; 27. Oil seal structure; 271. Skeleton oil seal; 28. Oil seal baffle; 2811. First groove; 2812. Second groove; 2813. Baffle protrusion; 29. ​​Sealed bearing seat; 291. Bearing; 292. Bearing seat ring; 30. Screw; 31. Helical blade; 40. Drive motor; 50. Motor plate; 51. Connecting plate; 61. First mounting fastener; 62. Second mounting fastener; 63. Pressure block fastener; 64. First baffle fastener; 65. Second baffle fastener. Detailed Implementation

[0029] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0030] Please refer to Figures 1 to 8 An embodiment of the present invention provides a spiral feeding mechanism, which includes a feeding cylinder 10 having an inlet 11 and an outlet 12, a screw 30 and a drive motor 40.

[0031] The feed inlet 11 and the discharge outlet 12 are distributed at intervals along the length of the feeding cylinder 10, with the feed inlet 11 located above the discharge outlet 12. The feed inlet 11 and the discharge outlet 12 are respectively close to both ends of the feeding cylinder 10.

[0032] Two sealing assemblies 20 are detachably provided at both ends of the feeding cylinder 10. The screw 30 is rotatably disposed inside the feeding cylinder 10 and the two sealing assemblies 20, and both ends of the screw 30 extend from the ends of the two sealing assemblies 20 away from the feeding cylinder 10.

[0033] Specifically, the sealing assembly 20 includes a mounting component 21, a sealing plate 22, a first sealing gasket 23, a sealing filler 24, a pressure block 25, a second sealing gasket 26, an oil seal structure 27, and a sealing bearing seat 29.

[0034] One end of the mounting piece 21 of the two sealing components 20 is detachably mounted at both ends of the feeding cylinder 10, and the sealing plate 22 is detachably mounted at the other end of the mounting piece 21. The screw 30 is rotatably mounted inside the feeding cylinder 10 and the two mounting pieces 21, and both ends of the screw 30 extend out from the through holes 221 of the sealing plates 22 of the two sealing components 20.

[0035] The first sealing gasket 23 is sandwiched between one end of the mounting member 21 and the corresponding end of the feeding cylinder 10. The sealing filler 24 is located inside the mounting member 21, and one end of the sealing filler 24 abuts against the first sealing gasket 23. Both the first sealing gasket 23 and the sealing filler 24 are detachably sleeved on the outer periphery of the screw 30. Both the first sealing gasket 23 and the sealing filler 24 serve a sealing function. The first sealing gasket 23 prevents powder in the feeding cylinder 10 from leaking out between one end of the mounting member 21 and the corresponding end of the feeding cylinder 10, thus avoiding pollution of the external environment. The sealing filler 24 prevents powder in the feeding cylinder 10 from leaking out between the first sealing gasket 23 and the screw 30, thus preventing powder from entering the sealed bearing seat 29, thereby avoiding damage to the bearing 291.

[0036] The inner wall of the mounting component 21 has an annular limiting portion 211, which is detachably fitted around the outer periphery of the sealing packing 24. One end of the limiting portion 211 abuts against the first sealing gasket 23. A pressure block 25 is located inside the mounting component 21 and annularly fitted around the outer periphery of the screw 30. The pressure block 25 is located between the sealing packing 25 and the sealing bearing seat 29 and is detachably mounted on the limiting portion 211. The other end of the sealing packing 24 abuts against the pressure block 25. The limiting portion 211 provides radial limiting for the sealing packing 24 and also compresses it, allowing the sealing packing 24 to deform and achieve a seal.

[0037] A sealed bearing housing 29 is located inside the mounting member 21 and surrounds the outer periphery of the screw 30. A bearing 291 is housed within the sealed bearing housing 29, and the bearing 291 is detachably fitted onto the outer periphery of the screw 30. The bearing 291 provides rotational support for the screw 30, and the sealed bearing housing 29 provides mounting support for the bearing 291. In this embodiment, there are two bearings 291, spaced apart along the length of the sealed bearing housing 29. The sealed bearing housing 29 is a conventional bearing housing with a sealing function. A second sealing gasket 26 is sandwiched between the sealing plate 22 and the other end of the mounting member 21. An oil seal structure 27 is located inside the mounting member 21 and sandwiched between the sealing plate 22 and the sealed bearing housing 29. The oil seal structure 27 is detachably fitted onto the outer periphery of the screw 30 and mounted on the sealing plate 22. The second sealing gasket 26 surrounds the outer periphery of the oil seal structure 27, and the sealed bearing housing 29 is detachably mounted on the oil seal structure 27. The second sealing gasket 26, the oil seal structure 27, and the sealed bearing housing 29 each serve a sealing function. The second sealing gasket 26 prevents dust, water, impurities, etc. from the external environment from entering the mounting component 21 through the space between the other end of the mounting component 21 and the sealing plate 22, and subsequently into the sealed bearing housing 29. The oil seal structure 27 and the sealed bearing housing 29 prevent dust, water, impurities, etc. from entering the sealed bearing housing 29 through the space between the sealing plate 22 and the screw 30, thereby protecting the bearing 291, preventing damage to the bearing 291, ensuring the normal operation of the screw feeding mechanism, and extending the service life of the screw feeding mechanism. Through the arrangement of the first sealing gasket 23, the sealing filler 24, the second sealing gasket 26, and the oil seal structure 27, the sealing assembly 20 of this utility model can achieve double sealing.

[0038] One end of the screw 30 is connected to the output end of the drive motor 40. The feed inlet 11 is close to the drive motor 40, which drives the screw 30 to rotate. The drive motor 40 is mounted on the mounting plate 50. The sealing assembly 20 close to the drive motor 40 has its sealing plate 22 connected to the mounting plate 50 via two vertically opposite connecting plates 51. The screw 30 is equipped with helical blades 31, which are located inside the feeding cylinder 10. The rotation of the screw 30 drives the helical blades 31 to rotate. In practical applications, powder enters the feeding cylinder 10 through the feed inlet 11. The drive motor 40 drives the screw 30 and the helical blades 31 to rotate, thereby loosening and conveying the powder to the discharge outlet 12. The powder is then discharged from the discharge outlet 12, thus achieving the conveying process.

[0039] In this embodiment, the oil seal structure 27 includes a skeleton oil seal 271 and an oil seal baffle 28. The oil seal baffle 28 is located inside the mounting member 21 and sandwiched between the sealing plate 22 and the sealing bearing seat 29. A first groove 2811 is provided at the end of the oil seal baffle 28 away from the sealing bearing seat 29, and a second groove 2812 is provided at the end of the oil seal baffle 28 near the sealing bearing seat 29. The second groove 2812 communicates with the first groove 2811, and the inner diameter of the second groove 2812 is larger than the inner diameter of the first groove 2811. The oil seal baffle 28 is detachably sleeved on the outer periphery of the screw 30 via the first groove 2811 and the second groove 2812. The oil seal baffle 28 is detachably mounted on the sealing plate 22. A second sealing gasket 26 is circumferentially disposed around the outer periphery of the oil seal baffle 28, and the sealing bearing seat 29 is detachably mounted on the oil seal baffle 28. The oil seal baffle 28 has a baffle protrusion 2813 at one end near the sealed bearing housing 29. The baffle protrusion 2813 surrounds the second groove 2812 and is inserted into one end of the sealed bearing housing 29. The baffle protrusion 2813 serves to axially limit the bearing 291. In this embodiment, the baffle protrusion 2813 is in contact with the adjacent bearing 291. The skeleton oil seal 271 mates with the second groove 2812 and is sleeved on the outer periphery of the screw 30. The skeleton oil seal 271 provides a sealing function. The skeleton oil seal 271 and the sealed bearing housing 29 prevent dust, water, impurities, etc. from the external environment from entering the sealed bearing housing 29 from between the sealing plate 22 and the screw 30. The oil seal baffle 28 provides mounting support for the skeleton oil seal 271 and the sealed bearing housing 29.

[0040] Preferably, both the first sealing gasket 23 and the second sealing gasket 26 are asbestos gaskets. The sealing filler 24 is packing, for example, graphite packing. The skeleton oil seal 271 is a lip-shaped skeleton oil seal. Asbestos gaskets, graphite packing, and lip-shaped skeleton oil seals are all suitable for high-temperature environments and can ensure good sealing performance.

[0041] The above structure allows for the replacement of the sealing assembly 20 or only the sealing packing 24 and the skeleton oil seal 271 of the sealing assembly 20.

[0042] Specifically, one end of the mounting component 21 has an annular first mounting portion 212 formed on its outer wall. The first mounting portion 212 has a first mounting hole 2121, and the first sealing gasket 23 has a second mounting hole. The outer walls of both ends of the feeding cylinder 10 have two annular feeding cylinder protrusions 14, which correspond to the first mounting portions 212 of the two sealing components 20, respectively. The feeding cylinder protrusions 14 have third mounting holes 141. Both the first mounting hole 2121 and the third mounting hole 141 are screw holes. First mounting fasteners 61, such as screws, are installed in the first mounting hole 2121 of the first mounting portion 212, the second mounting hole of the first sealing gasket 23, and the corresponding third mounting hole 141 of the feeding cylinder protrusions 14. The number of the first mounting holes 2121, the second mounting holes, the third mounting holes 141, and the first mounting fasteners 61 can be set according to the actual situation.

[0043] The outer wall of the other end of the mounting component 21 has an annular second mounting portion 213. The second mounting portion 213 has a first hole 2131, the second sealing gasket 26 has a second hole, and the sealing plate 22 has a third hole. Both the first hole 2131 and the third hole are screw holes. Second mounting fasteners 62, such as screws, are installed in the first hole 2131 of the mounting component 21, the second hole of the second sealing gasket 26, and the third hole of the sealing plate 22. The number of the first hole 2131, the second hole, the third hole, and the second mounting fastener 62 can be set according to the actual situation.

[0044] The oil seal baffle 28 is provided with a first connecting hole, and the sealing plate 22 is provided with a second connecting hole 222. Both the first connecting hole and the second connecting hole 222 are screw holes. A first baffle fastener 64, such as a screw, is installed in the first connecting hole of the oil seal baffle 28 and the second connecting hole 222 of the sealing plate 22. The number of the first connecting hole, the second connecting hole 222, and the first baffle fastener 64 can be set according to the actual situation.

[0045] One end of the sealed bearing housing 29 forms an annular bearing housing ring portion 292. The bearing housing ring portion 292 is provided with a third connecting hole, which is a screw hole. Second baffle fasteners 65, such as screws, are installed in the first connecting hole of the oil seal baffle 28 and the third connecting hole of the bearing housing ring portion 292. The number of third connecting holes and second baffle fasteners 65 corresponds to the number of first connecting holes.

[0046] The limiting part 211 has a limiting part mounting hole 2111 at one end near the pressure block 25. The outer wall of the end of the pressure block 25 away from the sealing filler 24 forms an annular pressure block ring 251, which has a pressure block mounting hole. Both the pressure block mounting hole and the limiting part mounting hole 2111 are screw holes. Pressure block fasteners 63, such as screws, are installed in the pressure block mounting hole of the pressure block ring 251 and the limiting part mounting hole 2111 of the limiting part 211. The number of limiting part mounting holes 2111, pressure block mounting holes, and pressure block fasteners 63 can be set according to actual conditions.

[0047] When the sealing assembly 20 needs to be replaced, first remove the first mounting fastener 61, then remove the sealing assembly 20 as a whole from the feed cylinder 10 and the screw 30. Then, clamp the first sealing gasket 23 of the new sealing assembly 20 between the mounting part 21 of the new sealing assembly 20 and the corresponding end of the feed cylinder 10. Then, install the first mounting fastener 61 in the first mounting hole 2121 of the mounting part 21 of the new sealing assembly 20, the second mounting hole of the first sealing gasket 23, and the third mounting hole 141 of the corresponding feed cylinder protrusion 14 of the feed cylinder 10.

[0048] When it is necessary to replace the sealing packing 24 and the skeleton oil seal 271, first remove the second mounting fastener 62 and the first baffle fastener 64. Then remove the sealing plate 22 and the second sealing gasket 26 from the mounting part 21. Then remove the oil seal baffle 28, the skeleton oil seal 271, the sealing bearing seat 29, and the bearing 291 from the screw 30 as a whole. Then remove the second baffle fastener 65. Then remove the sealing bearing seat 29 and the skeleton oil seal 271 from the oil seal baffle 28. Then fit the new skeleton oil seal 271 into the second groove 2812281 of the oil seal baffle 28. Then insert the baffle protrusion 2813 from one end of the sealing bearing seat 29 into the sealing bearing seat 29 and install the second baffle fastener 65 in the first connecting hole of the oil seal baffle 28 and the third connecting hole of the sealing bearing seat 29. In this way, the skeleton oil seal 271 is replaced. Then, remove the pressure block fastener 63, remove the pressure block 25 from the mounting part 21, remove the first mounting fastener 61, remove the mounting part 21 from the feeding cylinder 10 and the screw 30, remove the sealing packing 24 from the screw 30, and fit the new sealing packing 24 onto the outer periphery of the screw 30, with one end of the new sealing packing 24 abutting against the first sealing gasket 23. The sealing packing 24 is then replaced. Next, fit the mounting part 21 onto the outer periphery of the screw 30 and fit the limiting part 211 onto the outer periphery of the new sealing packing 24. Then, install the first mounting fastener 61 into the first mounting hole 2121 of the mounting part 21, the second mounting hole of the first sealing gasket 23, and the corresponding third mounting hole 141 of the feeding cylinder protrusion 14. Then, fit the pressure block 25 onto the outer periphery of the screw 30 and install the pressure block fastener 63 into the limiting part mounting hole 2111 and the pressure block mounting hole. Finally, install the oil seal baffle 28 and the new skeleton oil seal 2... 71. The sealed bearing housing 29 and the bearing 291 are fitted onto the outer circumference of the screw 30. Then, the sealing plate 22 is fitted onto the outer circumference of the screw 30, the second sealing gasket 26 is circumferentially fitted onto the outer circumference of the oil seal baffle 28, and the second mounting fastener 62 is installed in the first hole 2131 of the mounting part 21, the second hole of the second sealing gasket 26, and the third hole of the sealing plate 22. Finally, the first baffle fastener 64 is installed in the second connecting hole 222 of the sealing plate 22 and the first connecting hole of the oil seal baffle 28. Thus, the replacement is completed.

[0049] By detachably installing two sealing components 20 at each end of the feeding cylinder 10, the powder inside the feeding cylinder 10 can be prevented from leaking out from both ends of the feeding cylinder 10, thereby avoiding pollution of the external environment. It also makes it easy to replace the sealing components 20 regularly, without having to replace the sealing components 20 and the feeding cylinder 10 together, thus reducing the cost of use.

[0050] Furthermore, the outer periphery of the feeding cylinder 10 is fitted with a heat insulation component. The heat insulation component can isolate the temperature inside the feeding cylinder 10 from the external environment, thus protecting the operator and preventing burns.

[0051] In this embodiment, the heat insulation component includes a housing 13, which is fitted around the outer periphery of the feeding cylinder 10. The housing 13 is filled with heat insulation material 133. The ends of the inlet 11 and the outlet 12, respectively, extend beyond the housing 13. The outer wall of the housing 13 has a first clearance hole 131 and a second clearance hole 132 for the ends of the inlet 11 and the outlet 12 to extend beyond the housing 13. The heat insulation material 133 isolates the temperature inside the feeding cylinder 10 from the external environment. The heat insulation material 133 can be, for example, rock wool, and can be selected according to actual conditions.

[0052] In this embodiment, the screw 30 and the helical blade 31 are integrally formed, eliminating the need for welding, which facilitates manufacturing and ensures high processing precision.

[0053] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A screw feeding mechanism, comprising a feeding cylinder having an inlet and an outlet, and a screw, wherein the screw is provided with helical blades, characterized in that, Two sealing assemblies are detachably provided at both ends of the feeding cylinder. The screw is rotatably disposed in the feeding cylinder and the two sealing assemblies, and both ends of the screw extend from the ends of the two sealing assemblies away from the feeding cylinder. The spiral blades are located inside the feeding cylinder, and a heat insulation component is sleeved on the outer periphery of the feeding cylinder.

2. The screw feeding mechanism according to claim 1, characterized in that, The sealing assembly includes a mounting component, a sealing plate, a first sealing gasket, a sealing filler, and a sealing bearing seat. One end of the mounting component of each of the two sealing assemblies is detachably disposed at both ends of the feeding cylinder. The sealing plate is detachably disposed at the other end of the mounting component. The screw is rotatably disposed within the feeding cylinder and the two mounting components, with both ends of the screw extending from through holes in the sealing plates of the two sealing assemblies. The first sealing gasket is sandwiched between one end of the mounting component and the corresponding end of the feeding cylinder. The sealing filler is located within the mounting component, with one end of the sealing filler abutting against the first sealing gasket. The sealing bearing seat is located within the mounting component and circumferentially disposed around the outer periphery of the screw. A bearing is disposed within the sealing bearing seat. The first sealing gasket, the sealing filler, and the bearing are all detachably sleeved around the outer periphery of the screw.

3. The screw feeding mechanism according to claim 2, characterized in that, The sealing assembly further includes a second sealing gasket and an oil seal structure. The second sealing gasket is sandwiched between the sealing plate and the other end of the mounting component. The oil seal structure is located inside the mounting component and sandwiched between the sealing plate and the sealing bearing seat. The oil seal structure is detachably sleeved on the outer periphery of the screw and detachably mounted on the sealing plate. The second sealing gasket is circumferentially disposed on the outer periphery of the oil seal structure. The sealing bearing seat is detachably mounted on the oil seal structure.

4. The screw feeding mechanism according to claim 3, characterized in that, The oil seal structure includes a skeleton oil seal and an oil seal baffle. The oil seal baffle is located within the mounting component and sandwiched between the sealing plate and the sealing bearing seat. A first groove is provided at the end of the oil seal baffle away from the sealing bearing seat, and a second groove is provided at the end of the oil seal baffle near the sealing bearing seat. The second groove communicates with the first groove, and the inner diameter of the second groove is larger than the inner diameter of the first groove. The oil seal baffle is detachably fitted onto the outer periphery of the screw via the first and second grooves. The oil seal baffle is detachably mounted on the sealing plate. A baffle protrusion is provided at the end of the oil seal baffle near the sealing bearing seat, surrounding the second groove and inserted into one end of the sealing bearing seat. A second sealing gasket is annularly disposed around the outer periphery of the oil seal baffle. The sealing bearing seat is detachably mounted on the oil seal baffle. The skeleton oil seal mates with the second groove and is detachably fitted onto the outer periphery of the screw.

5. The screw feeding mechanism according to claim 2, characterized in that, One end of the mounting component has an annular first mounting portion formed on its outer wall. The first mounting portion has a first mounting hole, and the first sealing gasket has a second mounting hole. The outer walls of both ends of the feeding cylinder have two annular feeding cylinder protrusions, which correspond to the first mounting portions of the two sealing components respectively. The feeding cylinder protrusions have third mounting holes. First mounting fasteners are installed in the first mounting hole of the first mounting portion, the second mounting hole of the first sealing gasket, and the corresponding third mounting hole of the feeding cylinder protrusion.

6. The screw feeding mechanism according to claim 3, characterized in that, The other end of the mounting component has an annular second mounting portion formed on its outer wall. The second mounting portion has a first hole, the second sealing gasket has a second hole, and the sealing plate has a third hole. Second mounting fasteners are installed in the first hole of the mounting component, the second hole of the second sealing gasket, and the third hole of the sealing plate.

7. The screw feeding mechanism according to claim 4, characterized in that, The oil seal baffle is provided with a first connecting hole, and the sealing plate is provided with a second connecting hole. A first baffle fastener is installed in the first connecting hole of the oil seal baffle and the second connecting hole of the sealing plate. An annular bearing seat ring is formed on the outer wall of one end of the sealed bearing seat. The bearing seat ring is provided with a third connecting hole. A second baffle fastener is installed in the first connecting hole of the oil seal baffle and the third connecting hole of the bearing seat ring.

8. The screw feeding mechanism according to claim 2, characterized in that, The inner wall of the mounting component has an annular limiting portion, which is detachably sleeved on the outer periphery of the sealing packing. One end of the limiting portion abuts against the first sealing gasket. The sealing assembly also includes a pressure block, which is located inside the mounting component and annularly arranged around the outer periphery of the screw. The pressure block is located between the sealing packing and the sealing bearing seat and is detachably mounted on the limiting portion. The other end of the sealing packing abuts against the pressure block.

9. The screw feeding mechanism according to claim 1, characterized in that, The heat insulation component includes an outer shell, which is fitted around the outer periphery of the feeding cylinder. The outer shell is filled with heat insulation material, and the end of the inlet away from the feeding cylinder and the end of the outlet away from the feeding cylinder extend out of the outer shell, respectively.

10. The screw feeding mechanism according to claim 1, characterized in that, The screw and the helical blades are integrally formed.

Images