A feeding device for cellulose ether production
By adopting a supporting top and rotating groove combination structure in the cellulose ether feeding device, the problem of wear at the free end of the screw shaft was solved, extending the equipment life and reducing safety risks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG JOINWAY PHARM CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-06-23
AI Technical Summary
In existing cellulose ether feeders, the free end of the auger shaft is prone to contact with strip-shaped objects inside the cylinder, leading to wear, short service life, and the metal shavings generated by the wear may cause safety hazards.
A supporting head and a rotating groove are provided between the free end of the spiral shaft and the end cap. The supporting head supports the free end of the spiral shaft to prevent it from shifting, reduce wear with the strip, and reduce maintenance costs through a detachable design.
This effectively avoids wear between the auger shaft and the strip, extends the service life of the equipment, reduces the risk of metal debris entering the next process, and lowers safety hazards and maintenance costs.
Smart Images
Figure CN224393739U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of cellulose ether production equipment, specifically to a feeding device for cellulose ether production. Background Technology
[0002] Cellulose ethers are a class of high-molecular-weight compounds obtained from natural cellulose through chemical modification. These compounds combine the renewability and biodegradability of cellulose with the multifunctionality of synthetic polymers, and are widely used in construction, food, medicine, and daily chemical industries. The production process of cellulose ethers requires material handling and feeding; for example, at some stage, the cellulose ether needs to be fed into a pulverizer for crushing. Therefore, many feeding devices for cellulose ethers have emerged in the existing technology.
[0003] For example, patent CN203667443U discloses a feeder for the cellulose industry. Its cylinder contains a spiral shaft comprising a rotating shaft and spiral auger blades mounted on the rotating shaft. When the spiral shaft rotates, the spiral auger blades transport the cellulose ether from the cylinder inlet to the outlet. The cellulose ether leaves the outlet and enters the next processing unit (such as a crusher) for further processing. Thus, the feeder achieves the feeding of cellulose ether. Furthermore, the prior art has spaced strips along the circumferential direction on the inner wall of the cylinder. This allows some material to flow back to the inlet through the grooves between the strips when the outlet is congested, and then be transported again by the spiral shaft, preventing outlet blockage and spiral shaft jamming. However, in this existing technology, the screw shaft is only connected to the drive device at the end furthest from the discharge port (fixed end) and is supported by a bearing. The end of the screw shaft closest to the discharge port (free end) has no external support. Therefore, the screw shaft is similar to a cantilever beam structure. Under the influence of its own weight, temperature changes during operation, and mutual compression with the material, the screw shaft undergoes flexible deformation, causing its free end to shift in a certain direction (for example, the free end of the shaft shifts downward under the action of gravity). This causes the free end of the screw shaft to rub against the strip-shaped material on the inner wall of the cylinder, resulting in wear on the strip-shaped material and the screw shaft. This weakens the feeding capacity, reduces the service life of the feeder, and causes noise. In addition, the metal fragments generated by the wear enter the next process equipment (such as a crusher) through the discharge port with the material, which may cause collision sparks and safety accidents. Utility Model Content
[0004] The purpose of this invention is to provide a feeding device for cellulose ether production, which solves the problem in existing cellulose ether feeders where the free end of the spiral shaft easily comes into contact with the strip-shaped material inside the cylinder, causing mutual wear, resulting in a short service life of the spiral shaft and the strip-shaped material, and causing safety hazards due to metal debris entering the next process equipment. By cooperating with the rotating groove of the free end of the spiral shaft on the support top on the end cover, the end cover supports the free end of the spiral shaft, thereby preventing the free end of the spiral shaft from shifting in other directions and avoiding contact between the spiral shaft and the strip-shaped material inside the cylinder, thus preventing mutual wear.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a feeding device for cellulose ether production, comprising a cylinder, a spiral shaft, and a driving mechanism. The cylinder has a feed inlet, the spiral shaft is disposed within the cylinder, and the spiral shaft includes a rotating shaft and spiral blades disposed on the rotating shaft. The driving mechanism is connected to the spiral shaft to drive the spiral shaft to rotate. The cylinder is characterized in that one end is provided with an end cap, the end cap has a discharge port, and a guide strip is provided inside the end cap, with a return groove formed between adjacent guide strips. The fixed end of the spiral shaft is connected to the driving mechanism, the free end of the spiral shaft faces the end cap, the end cap has a support top, and the free end of the spiral shaft has a rotating groove that cooperates with the support top to allow the end cap to support the free end of the spiral shaft.
[0006] In one embodiment, the support top is a conical protrusion structure, the rotating groove is a conical groove structure, and the conical protrusion structure and the conical groove structure correspond and match.
[0007] In one embodiment, the free end of the spiral shaft is detachably connected to a support disk, the rotating groove is located at the center of the support disk, and the hardness of the support disk is lower than the hardness of the support top.
[0008] In one embodiment, the free end of the spiral shaft is detachably connected to a first bearing, the rotating groove is the center mating hole of the first bearing, the support top is a cylindrical shaft structure, and the cylindrical shaft structure corresponds to and mates with the center mating hole of the first bearing.
[0009] In one embodiment, the end cap includes an end plate and a side plate. The discharge port and the support head are both disposed on the end plate. The side plate is disposed at the periphery of the end plate to enclose and form an extrusion cavity. The guide strips are arranged circumferentially at intervals on the inner wall of the side plate, and the hardness of the guide strips is lower than that of the side plate.
[0010] In one embodiment, the end cap is detachably connected to the cylinder body so that the end cap can be removed and replaced individually.
[0011] In one embodiment, the guide strip is detachably connected to the side plate so that the guide strip can be removed and replaced individually.
[0012] In one embodiment, the end cap further includes a first flange disposed around the periphery of the side plate, and a second flange is provided at the end of the cylinder. The first flange and the second flange are detachably connected to each other, so that the end cap is detachably connected to the cylinder.
[0013] In one embodiment, the fixed end of the spiral shaft is provided with a third flange, and the drive mechanism is provided with a fourth flange. The third flange and the fourth flange are detachably connected by a safety bolt, and the safety bolt has a torque threshold.
[0014] The advantages of this application compared to the prior art are:
[0015] In this embodiment, the free end of the spiral shaft engages with the support head on the end cover via a rotating groove, allowing the free end of the spiral shaft to be supported by the support head and maintained in its initial position. In other words, the support head limits the free end of the spiral shaft through its supporting action, preventing the free end of the spiral shaft from shifting in other directions. This prevents the free end of the spiral shaft from contacting the guide strip on the end cover, thus preventing mutual wear between the rotating spiral shaft and the guide strip. This also prevents the service life of the spiral shaft and the guide strip from being reduced due to wear, and prevents metal debris generated by wear from entering the next process equipment and causing safety hazards. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the overall structure of a feeding device for cellulose ether production according to an embodiment of this application;
[0018] Figure 2 This is a schematic diagram of the structure of the free end of the spiral shaft and the end cap in an embodiment of this application;
[0019] Figure 3 This is a three-dimensional structural diagram of the end cap in an embodiment of this application;
[0020] Figure 4 This is a three-dimensional structural diagram of the support disk in an embodiment of this application;
[0021] Figure 5This is a three-dimensional structural diagram of the free end of the spiral shaft in an embodiment of this application;
[0022] Figure 6 This is a schematic diagram of the connection structure between the drive mechanism and the fixed end of the screw shaft in an embodiment of this application. Detailed Implementation
[0023] The terms “first,” “second,” “third,” etc., are used only for distinguishing descriptions and do not indicate a sequence number, nor should they be interpreted as indicating or implying relative importance.
[0024] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0025] In the description of this application, it should be noted that the terms "inner", "outer", "left", "right", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0026] In the description of this application, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” shall be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components.
[0027] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings.
[0028] Please refer to Figure 1This application discloses a feeding device for cellulose ether production, comprising a cylinder 100, a screw shaft 300, and a drive mechanism 200. The cylinder 100 has a feed inlet 110, and the screw shaft 300 is disposed within the cylinder 100, comprising a rotating shaft 310 and helical blades 320 disposed on the rotating shaft 310. The drive mechanism 200 is connected to the screw shaft 300 to drive the screw shaft 300 to rotate. During operation, cellulose ether enters the cylinder 100 through the feed inlet 110. The drive mechanism 200 drives the screw shaft 300 to rotate, and the screw shaft 300 pushes the cellulose ether in the cylinder 100 towards the discharge direction of the cylinder 100 through the helical blades 320, so that the cellulose ether eventually leaves the cylinder 100. In this embodiment, the discharge direction of the cylinder 100 is aligned with the feed direction of the next process equipment, and the cellulose ether discharged from the cylinder 100 directly enters the next process equipment, thus realizing the feeding of the next process equipment. In this embodiment, one end of the spiral shaft 300 is connected to the drive mechanism 200. This end of the spiral shaft 300 is the fixed end 301. Preferably, the fixed end 301 of the spiral shaft 300 is supported by a bearing to maintain the operational stability of the spiral shaft 300. Hereinafter, "material" refers to "cellulose ether".
[0029] Please refer to Figure 2The difference between this embodiment and the prior art is that the cylinder 100 has an end cap 400 at one end, the end cap 400 has a discharge port 410, the end cap 400 has a guide strip 420 inside, and a return groove 421 is formed between adjacent guide strips 420. The fixed end 301 of the spiral shaft 300 is connected to the drive mechanism 200, the free end 302 of the spiral shaft 300 faces the end cap 400, the end cap 400 has a support head 430, and the free end 302 of the spiral shaft 300 has a rotating groove 330. The rotating groove 330 cooperates with the support head 430 so that the end cap 400 supports the free end 302 of the spiral shaft 300. If only the fixed end 301 of the screw shaft 300 is supported, it is similar to a cantilever beam structure. Under the influence of its own weight, temperature changes during operation, and mutual compression with materials, the screw shaft 300 is prone to flexible deformation, causing its free end 302 to shift in a certain direction (for example, the free end 302 of the shaft 310 shifts downward under the action of gravity). This causes the free end 302 of the screw shaft 300 to rub against the strip-shaped material on the inner wall of the cylinder 100, resulting in wear on the strip-shaped material and the screw shaft 300. In this embodiment, the free end 302 of the spiral shaft 300 cooperates with the support head 430 on the end cover 400 through the rotating groove 330, so that the free end 302 of the spiral shaft 300 is supported by the support head 430 to maintain the free end 302 of the spiral shaft 300 in the initial position. In other words, the support head 430 limits the free end 302 of the spiral shaft 300 through the support action, preventing the free end 302 of the spiral shaft 300 from deviating in other directions, thereby preventing the free end 302 of the spiral shaft 300 from contacting the guide strip 420 provided on the end cover 400, thereby preventing mutual wear between the rotating spiral shaft 300 and the guide strip 420, preventing the service life of the spiral shaft 300 and the guide strip 420 from being reduced due to wear, and preventing metal debris generated by wear from entering the next process equipment and causing safety hazards. In this embodiment, the discharge port 410 is located on the end cap 400, and a return groove 421 is formed between adjacent guide strips 420. When the discharge port 410 of the cylinder 100 cannot discharge the material in time, causing material congestion, the material can flow back through the return groove 421 and be transported back to the discharge port 410 by the spiral blades 320, thereby avoiding the situation where the spiral shaft 300 is jammed due to material congestion. In this embodiment, the center of the rotating groove 330 corresponds to the center of the spiral shaft 300, so that the rotating groove 330 and the spiral shaft 300 are concentrically arranged and rotate coaxially during operation. The drive mechanism 200 includes a motor, and the output shaft of the motor is connected to the spiral shaft 300.
[0030] Please refer to Figure 3 , Figure 4In one embodiment of this application, the supporting top 430 is preferably a conical protrusion structure, and the rotating groove 330 is a conical groove structure, with the conical protrusion structure and the conical groove structure corresponding and matching. Specifically, in this embodiment, the outer diameter of the conical protrusion structure gradually increases from the end near the spiral shaft 300 to the end away from the spiral shaft 300, and the inner diameter of the conical groove structure gradually increases from the bottom to the opening, so that the conical protrusion structure can correspond and fit with the conical groove structure, and the conical groove structure is open towards the conical protrusion structure, facilitating their mutual correspondence and contact. Furthermore, the conical protrusion structure and the conical groove structure abut against each other through their conical surfaces; the deeper the contact, the tighter the fit, which can improve the connection strength and stability between the supporting top 430 and the rotating groove 330.
[0031] Furthermore, since the rotating groove 330 needs to rotate continuously relative to the support head 430 during operation, the closer the rotating groove 330 and the support head 430 are, the greater the friction between the rotating groove 330 and the support head 430, the greater the load on the drive mechanism 200, resulting in greater stress on the support head 430 and more severe mutual wear between the support head 430 and the rotating groove 330. In this embodiment, the support top 430 and the rotating groove 330 are connected by the mutual abutment of the conical protrusion structure and the conical groove structure. Compared with the abutment of the cylindrical protrusion and the cylindrical groove, the top of the conical protrusion structure directly abuts against the bottom of the conical groove structure, which reduces the direct contact area between the support top 430 and the rotating groove 330, thereby reducing the frictional force at the direct contact point. Furthermore, the contact is mainly through the conical surfaces, and the stress at the conical surfaces is decomposed into two components: axial and radial. The radial component generally hinders the rotation of the rotating groove 330, while the axial component is smaller. Therefore, the pressing effect of the axial component on the rotating groove 330 is weakened, thus reducing the resistance to the rotation of the rotating groove 330. Therefore, in this embodiment, the support top 430 and the rotating groove 330 are connected by the mutual abutment of the conical protrusion structure and the conical groove structure. This not only ensures the connection strength and stability between the support top 430 and the rotating groove 330, but also reduces the obstruction effect of the support top 430 on the rotation of the rotating groove 330. This reduces the load on the drive mechanism 200, reduces the stress on both, and reduces mutual wear, thereby saving energy for the drive mechanism 200 and extending the service life of the support top 430 and the rotating groove 330.
[0032] In this embodiment, the rotating groove 330 and the support head 430 are correspondingly abutted and fitted. Although the mutual wear is reduced by the corresponding matching connection of the conical protrusion structure and the conical groove structure, the mutual wear between the two still exists when the rotating groove 330 rotates relative to the support head 430. After long-term use, the mutual wear causes the outer diameter of the support head 430 to become smaller and the inner diameter of the rotating groove 330 to become larger. This leads to a decrease in the tightness of the abutment between the support head 430 and the rotating groove 330, and even the existence of local gaps between them. This causes the support head 430 to lose its good limiting of the rotating groove 330, which means that the free end 302 of the spiral shaft 300 will shift to other directions due to flexible deformation. On the one hand, this causes the free end 302 of the spiral shaft 300 to be unstable and easy to shake during operation, affecting the overall operating stability of the spiral shaft 300. On the other hand, when the wear is severe, the spiral shaft 300 has a large offset and comes into contact with the guide strip 420, resulting in mutual wear between the spiral shaft 300 and the guide strip 420. If the above situation occurs, the spiral shaft 300 needs to be replaced to replace the rotating groove 330, and the end cover 400 needs to be replaced to replace the support head 430 (if the connection between the end cover 400 and the cylinder 100 is not detachable, the entire cylinder 100 needs to be replaced), resulting in excessive maintenance costs.
[0033] Therefore, in this embodiment of the application, it is further preferred that the free end 302 of the spiral shaft 300 is detachably connected to the support disk 500, please refer to Figure 5The rotating groove 330 is located at the center of the support plate 500, and the hardness of the support plate 500 is lower than that of the support top 430. In this embodiment, the hardness of the rotating groove 330 is lower than that of the support top 430. Therefore, during the relative rotation of the two, the wear on the rotating groove 330 is mainly caused by the support top 430. That is, the wear is mainly borne by the rotating groove 330, while the support top 430 does not experience wear or experiences minimal wear, which does not affect its normal use. In this case, when the mutual contact and fit between the support top 430 and the rotating groove 330 cannot meet the requirements of normal use, it means that the rotating groove 330 has suffered severe wear. In this case, it is only necessary to replace the rotating groove 330. In this embodiment, the rotating groove 330 is located on the support plate 500, which is detachably connected to the free end 302 of the spiral shaft 300. Therefore, replacing the support plate 500 is sufficient to replace the rotating groove 330, eliminating the need to replace the entire spiral shaft 300. This saves material costs, time, and labor, thereby reducing maintenance costs. Specifically, in this embodiment, the support plate 500 is fixed to the end face of the spiral shaft 300 facing the end cover 400, and can be secured with bolts. Fixing holes are provided on the end faces of the support plate 500 and the spiral shaft 300 facing the end cover 400 for bolt installation. In this embodiment, the material hardness of the support plate 500 is lower than that of the support head 430. Specifically, the support plate 500 can be made of plastic materials such as nylon or PTFE, while the support head 430 is made of metal materials such as stainless steel, so that wear mainly occurs on the support plate 500.
[0034] In one preferred embodiment of this application, the free end 302 of the spiral shaft 300 is detachably connected to a first bearing. The rotating groove 330 is the central mating hole of the first bearing, and the supporting head 430 is a cylindrical shaft structure that corresponds to and mates with the central mating hole of the first bearing. In this embodiment, the free end 302 of the spiral shaft 300 engages with the supporting head 430 via the first bearing. During operation, the inner ring of the first bearing is fixed, while the outer ring rotates with the spiral shaft 300. This achieves both support and limitation of the free end 302 of the spiral shaft 300 by the supporting head 430, and relative rotation between the spiral shaft 300 and the supporting head 430. Furthermore, the relative rotation achieved through the first bearing effectively reduces the friction between the spiral shaft 300 and the supporting head 430, thereby reducing the load on the drive mechanism 200 and preventing mutual wear between the spiral shaft 300 and the supporting head 430.
[0035] In this embodiment, the end cap 400 is provided with a discharge port 410, and a guide strip 420 is provided inside the end cap 400. A return groove 421 is formed between adjacent guide strips 420. When material becomes congested inside the end cap 400, some material flows back through the return groove 421 (away from the discharge port 410) and is then transported again by the screw shaft 300. In this embodiment, the free end 302 of the screw shaft 300 is supported and limited by the support top 430 provided on the end cap 400 to prevent the free end 302 of the screw shaft 300 from deviating in other directions and contacting the guide strip 420. However, after long-term use, when the rotating groove 330 and / or the support top 430 suffer severe wear, the supporting and limiting effect of the support top 430 on the free end 302 of the screw shaft 300 weakens, and a gap exists between the rotating groove 330 and the support top 430, allowing the free end 302 of the screw shaft 300 to be able to move relative to the support top. If the head 430 deviates, the free end 302 of the spiral shaft 300 may come into contact with the guide bar 420, causing wear on the spiral shaft 300 and the guide bar 420. Generally, in this case, the support head 430 or the rotating groove 330 can be replaced directly. However, it is difficult to detect that the guide bar 420 has begun to wear in time during the operation of the feeding device. Therefore, if the support head 430 or the rotating groove 330 is not replaced in time, the guide bar 420 and the spiral shaft 300 will wear, and the metal debris generated by the wear may cause safety hazards if it enters the next process equipment.
[0036] Therefore, please refer to Figure 3 In one preferred embodiment of this application, the end cap 400 includes an end plate 401 and a side plate 402. The discharge port 410 and the support head 430 are both disposed on the end plate 401. The side plate 402 is disposed at the periphery of the end plate 401 to enclose and form an extrusion cavity 403. The guide strips 420 are arranged circumferentially on the inner wall of the side plate 402 at intervals, and the hardness of the guide strips 420 is lower than the hardness of the side plate 402. The end plate 401 faces the end face of the free end 302 of the screw shaft 300. The side plate 402 is located around the end plate 401 to form an extrusion chamber 403. The screw shaft 300 transports the material to the extrusion chamber 403 and then discharges the material through the discharge port 410. The guide strips 420 are located on the inner wall of the side plate 402 and are arranged at intervals along the circumference. The hardness of the guide strips 420 is lower than that of the side plate 402. Specifically, the guide strips 420 are made of plastic materials such as nylon or PTFE. In this way, the wear is mainly borne by the guide strips 420, and the debris is non-metallic. Even if it enters the next process equipment, it will not cause sparks and create safety hazards.
[0037] Furthermore, in one embodiment of this application, the end cap 400 is preferably detachably connected to the cylinder 100, so that the end cap 400 can be removed and replaced individually. This allows the guide strip 420 inside the end cap 400 to be replaced after wear, by replacing the end cap 400. In a further improvement, this embodiment preferably allows the guide strip 420 to be detachably connected to the side plate 402, so that the guide strip 420 can be removed and replaced individually. This eliminates the need to replace the entire end cap 400; only the end cap 400 needs to be removed, and the guide strip 420 can be replaced separately, saving costs. Specifically, the guide strip 420 is preferably fixed to the inner wall of the side plate 402 with bolts, and both the guide strip 420 and the side plate 402 have fixing holes for bolt installation.
[0038] For further details, please refer to Figure 2 In one embodiment of this application, the end cap 400 further includes a first flange 610 disposed around the periphery of the side plate 402, and a second flange 620 is provided at the end of the cylinder 100. The first flange 610 and the second flange 620 are detachably connected to each other, so that the end cap 400 is detachably connected to the cylinder 100. Specifically, the first flange 610 and the second flange 620 are connected by bolts to achieve a detachable connection between the end cap 400 and the cylinder 100. This facilitates disassembly and assembly and improves connection stability.
[0039] For further details, please refer to Figure 6 In one preferred embodiment of this application, the fixed end 301 of the spiral shaft 300 is provided with a third flange 630, and the drive mechanism 200 is provided with a fourth flange 640. The third flange 630 and the fourth flange 640 are detachably connected by a safety bolt, and the safety bolt has a torque threshold. In this embodiment, the safety bolt can be made of plastic, which will break when the torque threshold is reached. Thus, when the spiral shaft 300 rotates, the increased resistance due to contact with the guide strip 420 will cause an increase in torque at the connection between the drive mechanism 200 and the spiral shaft 300. If the torque exceeds the torque threshold of the safety bolt, the safety bolt will break, thereby informing the operator that the spiral shaft 300 has come into contact with the guide strip 420 and requires maintenance.
[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A feeding device for cellulose ether production, comprising a cylindrical body, a spiral shaft, and a drive mechanism, wherein the cylindrical body has a feed inlet, the spiral shaft is disposed within the cylindrical body, and the spiral shaft includes a rotating shaft and spiral blades disposed on the rotating shaft, and the drive mechanism is connected to the spiral shaft to drive the spiral shaft to rotate, characterized in that, One end of the cylinder is provided with an end cap, the end cap is provided with a discharge port, the end cap is provided with a guide strip, and a return groove is formed between adjacent guide strips. The fixed end of the spiral shaft is connected to the drive mechanism, the free end of the spiral shaft faces the end cap, the end cap is provided with a support top, and the free end of the spiral shaft is provided with a rotation groove. The rotation groove cooperates with the support top so that the end cap supports the free end of the spiral shaft.
2. The feeding device for cellulose ether production according to claim 1, characterized in that, The support top is a conical protrusion structure, and the rotating groove is a conical groove structure, with the conical protrusion structure and the conical groove structure corresponding and matching.
3. A feeding device for cellulose ether production according to claim 1 or 2, characterized in that, The free end of the spiral shaft is detachably connected to a support plate, the rotating groove is located in the center of the support plate, and the hardness of the support plate is lower than that of the support top.
4. The feeding device for cellulose ether production according to claim 1, characterized in that, The free end of the spiral shaft is detachably connected to a first bearing, the rotating groove is the center mating hole of the first bearing, the support top is a cylindrical shaft structure, and the cylindrical shaft structure corresponds to and mates with the center mating hole of the first bearing.
5. A feeding device for cellulose ether production according to claim 1, characterized in that, The end cap includes an end plate and a side plate. The discharge port and the support head are both located on the end plate. The side plate is located at the periphery of the end plate to enclose and form an extrusion cavity. The guide strips are arranged circumferentially on the inner wall of the side plate, and the hardness of the guide strips is lower than that of the side plate.
6. A feeding device for cellulose ether production according to claim 5, characterized in that, The end cap is detachably connected to the cylinder body so that the end cap can be removed and replaced individually.
7. A feeding device for cellulose ether production according to claim 6, characterized in that, The guide strip is detachably connected to the side plate so that the guide strip can be removed and replaced individually.
8. A feeding device for cellulose ether production according to claim 6, characterized in that, The end cap also includes a first flange disposed around the periphery of the side plate, and a second flange is provided at the end of the cylinder. The first flange and the second flange are detachably connected to each other so that the end cap can be detachably connected to the cylinder.
9. A feeding device for cellulose ether production according to claim 1, characterized in that, The fixed end of the spiral shaft is provided with a third flange, and the drive mechanism is provided with a fourth flange. The third flange and the fourth flange are detachably connected by a safety bolt, and the safety bolt has a torque threshold.