A screw conveyor

Abstract

The application discloses a screw conveyor which is used for reducing material accumulation and improving material conveying efficiency. The application comprises a driving member, a machine cylinder, a screw conveying assembly and a support. The machine cylinder comprises a plurality of cylinder segments. The screw conveying assembly is arranged in the cylinder segments. The screw conveying assembly comprises a screw blade and a screw shaft. The screw blade is sleeved on the screw shaft, and the pitch of the screw blade decreases along the material conveying direction. Two adjacent cylinder segments are connected through the support. The support ribs are arranged along the radial direction of the cylinder segment. The screw shaft penetrates through the support and is rotationally connected with the support. The driving member is connected with the end of the machine cylinder and is drivingly connected with the screw shaft. The driving member is used for driving the screw shaft to rotate.

Description

Technical Field

[0001] This application relates to the field of screw conveying technology, and more particularly to a screw conveyor. Background Technology

[0002] Screw conveyors, as a type of continuous conveying equipment, are widely used in material handling in industries such as chemical, metallurgical, building materials, food, and mining. With their simple structure and flexible layout, screw conveyors can meet the material handling needs of various working conditions, making them one of the most common conveying devices in industrial production.

[0003] In existing technologies, screw conveyors typically use a motor to drive the helical blades in the drum to rotate, pushing material from the inlet to the outlet. For long-distance conveying applications, some screw conveyors employ a structure with multiple drum sections connected sequentially, and the sections are fixed together by connectors.

[0004] However, in segmented screw conveyors, there are gaps between the screw blades of each segment. During the conveying process, materials tend to accumulate in the gaps, causing blockage of the conveying channel and reducing conveying efficiency. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a screw conveyor for reducing material accumulation and improving material conveying efficiency.

[0006] The technical solution provided in this application is described below:

[0007] This application provides a screw conveyor, which is inclined to a horizontal plane and includes: Drive components, barrel, screw conveyor assembly, and support frame; The barrel comprises several sections; The spiral conveyor assembly is disposed within the cylindrical section; The spiral conveyor assembly includes spiral blades and a spiral shaft; The spiral blades are sleeved on the spiral shaft, and the pitch of the spiral blades decreases along the material conveying direction; Two adjacent cylindrical sections are connected by the bracket, the support ribs of the bracket are arranged radially along the cylindrical section, and the helical shaft passes through the bracket and is rotatably engaged with the bracket; The driving component is connected to the end of the barrel and is drively connected to the helical shaft. The driving component is used to drive the helical shaft to rotate.

[0008] Optionally, the edge of the spiral blade is provided with an elastic scraper assembly, the elastic scraper assembly including a scraper and an elastic element; The scraper is connected to the edge of the spiral blade via the elastic element; The scraper abuts against the inner wall of the cylindrical section.

[0009] Optionally, the feed inlet of the barrel is provided with a sealing assembly, which includes a sealing flange and a sealing ring; The sealing flange is provided on the outside of the feed inlet of the barrel; The sealing ring is located on the inside of the sealing flange.

[0010] Optionally, the sealing ring is an inflatable flexible sealing ring.

[0011] Optionally, the surface of the helical blade is provided with a flow guide groove.

[0012] Optionally, a guide plate is inclinedly arranged inside the feed inlet of the barrel.

[0013] Optionally, a cleaning port is provided on the side wall of the cylindrical section; The unblocking port is equipped with a sealing cap; The unblocking port is detachably connected to the sealing cap.

[0014] Optionally, the discharge port of the barrel is provided with a discharge buffer chamber, and a buffer baffle is inclinedly arranged inside the discharge buffer chamber.

[0015] Optionally, the top of the discharge buffer chamber is provided with a negative pressure dust removal interface for connecting to dust removal equipment.

[0016] Optionally, the inner wall of the barrel is provided with an anti-stick coating.

[0017] As can be seen from the above technical solutions, this application has the following beneficial effects: 1. The various sections of the cylinder are fixedly connected by a bracket, and the spiral shafts of each section are interconnected, which shortens the connection distance of the spiral blades in each section, so that the material is less likely to accumulate at the connection points of each section. At the same time, the support ribs of the bracket are arranged radially along the cylinder, so that the bracket only forms a narrow side or linear cross section at the bottom of the cylinder, and does not form a horizontal platform for material to stay, reducing the accumulation of material at the bracket, thereby improving the material conveying efficiency.

[0018] 2. By reducing the pitch of the spiral blades along the material conveying direction, the larger pitch spiral blades near the inlet quickly disperse the material, preventing accumulation at the inlet. The middle spiral blades gradually compact the material, reducing the gap between the material and the inner wall of the barrel. The smaller pitch spiral blades near the outlet steadily convey the material, reducing the gap between the material and the inner wall of the barrel, lowering the possibility of material adhering to the barrel wall, and also reducing the impact and friction of the material on the spiral blades and the inner wall of the barrel, thereby improving the overall service life of the equipment. At the same time, the whole machine is tilted to the horizontal plane, so that the material moves towards the outlet with the assistance of gravity, reducing the accumulation of material in each section of the barrel and improving the material conveying efficiency. Attached Figure Description

[0019] Figure 1 A schematic diagram of the screw conveyor provided in this application; Figure 2 A schematic diagram of the screw conveying assembly in the screw conveyor provided in this application; Figure 3 This is another structural schematic diagram of the screw conveying assembly in the screw conveyor provided in this application. Detailed Implementation

[0020] In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and other terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to describe the relative positional relationship between the components or parts and do not specifically limit the specific installation orientation of each component or part.

[0021] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0022] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0023] Furthermore, the structures, proportions, sizes, etc., drawn in the accompanying drawings of this application are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modification to the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.

[0024] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] See Figure 1 and Figure 3 This application first provides an embodiment of a screw conveyor, wherein the screw conveyor is inclined to a horizontal plane, and the embodiment includes: Drive component 1, barrel 2, screw conveyor assembly 3, and support frame 4; The barrel 2 includes several barrel sections 5; The screw conveyor assembly 3 is installed inside the cylinder section 5; The screw conveyor assembly 3 includes screw blades 6 and a screw shaft 7; The spiral blade 6 is mounted on the spiral shaft 7, and the pitch of the spiral blade 6 decreases along the material conveying direction; Two adjacent cylindrical sections 5 are connected by a bracket 4. The support ribs 8 of the bracket 4 are arranged radially along the cylindrical section 5. The spiral shaft 7 passes through the bracket 4 and rotates with the bracket 4. The drive component 1 is connected to the end of the barrel 2 and is connected to the screw shaft 7 for transmission. The drive component 1 is used to drive the screw shaft 7 to rotate.

[0026] Drive component 1: Drive component 1, serving as a power source, is located on the outer end of the barrel 2 and is connected to the screw shaft 7 via a coupling to drive the screw shaft 7 to rotate. Drive component 1 is preferably a variable frequency motor, which can adjust the speed in real time according to the material conveying conditions to control the conveying flow rate.

[0027] Cylinder 2: Cylinder 2 is the outer shell of the screw conveyor, which is composed of multiple cylinder sections 5 connected in sequence along the axial direction to form a closed channel for material conveying. The upper part of the cylinder 2 is provided with a feed port 22 and a discharge port 23, which are used for material input and discharge respectively. The cylinder 2 is inclined to the horizontal plane, so that the material moves towards the discharge end by gravity during the conveying process, which helps to reduce the retention of material inside the cylinder 2.

[0028] Screw Conveyor Assembly 3: The screw conveyor assembly 3 is disposed inside the cylinder section 5 and is used to push materials. The screw conveyor assembly 3 consists of screw blades 6 and a screw shaft 7. The screw shaft 7 is a hollow shaft that extends axially along the cylinder 2. The screw blades 6 spirally wrap around the outer circumference of the screw shaft 7. The pitch of the screw blades 6 gradually decreases along the material conveying direction, so that the material is subjected to gradually increasing compressive force during the conveying process. For example, the pitch of each section of the screw blades 6 decreases smoothly along the material conveying direction or decreases segment by segment. This application uses the example of the segment by segment decrease of the screw blades 6 for specific explanation. The large pitch at the feed end is conducive to the rapid entry and dispersion of materials, while the small pitch at the discharge end makes the materials gradually uniform and dense, thereby reducing the gap and relative movement between the materials and the inner wall of the cylinder 2, and reducing the possibility of material adhesion and equipment wear.

[0029] Support 4: Support 4 is fixed at the connection between two adjacent cylindrical sections 5. Support 4 is provided with support ribs 8 extending vertically along the radial direction of cylindrical section 5. The outer end of the support rib 8 is fixed to the inner wall of cylindrical section 5, and the inner end forms a bearing seat. The spiral shaft 7 passes through the bearing seat and rotates with the bearing seat. The support rib 8 is arranged vertically along the radial direction, forming only a narrow side on the end face of cylindrical section 5, thereby preventing material from accumulating at support 4. At the same time, support 4 shortens the span of each spiral blade 6, making material conveying stable and less prone to accumulation at the connection of cylindrical sections 5.

[0030] Working Principle: When the screw conveyor is working, the drive unit 1 drives the screw shaft 7 to rotate, and the screw shaft 7 drives the screw blades 6 to rotate synchronously. The material is fed into the inside of the barrel 2 from the feed port 22 and moves axially towards the discharge port 23 under the pushing action of the rotating screw blades 6. During this process, the pitch of the screw blades 6 gradually decreases along the conveying direction, so that the material is subjected to gradually increasing compressive force during the conveying process. The large pitch screw blades 6 at the feed end quickly disperse the material and prevent accumulation at the feed port 22. The pitch of the screw blades 6 in the middle section gradually transitions, so that the material is gradually compacted during the conveying process. The small pitch at the discharge end further compresses the material. At the same time, the bracket 4 connects the sections of the screw blades 6, shortening the span of each section of the screw shaft 7, so that the material is conveyed stably. In addition, the whole machine is set at an inclination to the horizontal plane, and the material moves towards the discharge port 23 with the assistance of its own gravity.

[0031] In this embodiment, the various sections of the cylinder 5 are fixedly connected by the bracket 4, and the various spiral shafts 7 in the cylinder 5 are interconnected, which shortens the connection distance of the spiral blades 6 in each section of the cylinder 5, so that the material is less likely to accumulate at the connection part of each section of the cylinder 5; at the same time, the support ribs 8 of the bracket 4 are arranged radially along the cylinder 5, so that the bracket 4 only forms a narrow side or linear cross section at the bottom of the cylinder 2, and does not form a horizontal platform for material to stay, reducing the accumulation of material at the bracket 4, thereby improving the material conveying efficiency. Furthermore, by reducing the pitch of the spiral blades 6 along the material conveying direction, the larger pitch spiral blades 6 near the feed inlet 22 quickly disperse the material and prevent accumulation at the feed inlet 22. The middle spiral blades 6 gradually compact the material, reducing the gap between the material and the inner wall of the barrel 2. The smaller pitch spiral blades 6 near the discharge end stably convey the material, reducing the gap between the material and the inner wall of the barrel 2, reducing the possibility of material adhering to the barrel wall, and also reducing the impact and friction of the material on the spiral blades 6 and the inner wall of the barrel 2, thereby improving the overall service life of the equipment. At the same time, the whole machine is tilted to the horizontal plane, so that the material moves towards the discharge outlet 23 with the assistance of gravity, reducing the accumulation of material in each section of the barrel 5 and improving the material conveying efficiency.

[0032] In an optional embodiment, the edge of the spiral blade 6 is provided with an elastic scraper assembly 9, which includes a scraper 10 and an elastic element 11. The scraper 10 is connected to the edge of the spiral blade 6 via the elastic element 11; The scraper 10 abuts against the inner wall of the cylindrical section 5.

[0033] In this embodiment, during the rotation of the helical blade 6 to push the material, the scraper 10, under the elastic force of the elastic element 11, always remains in contact with the inner wall of the cylinder section 5 and continuously scrapes the inner wall of the cylinder section 5, promptly removing the material adhering to the inner wall of the cylinder section 5 and preventing the material from gradually accumulating and forming hard lumps, thereby ensuring unobstructed conveying. The scraper 10 is typically made of a wear-resistant elastic material, such as polyurethane, to protect the helical blade 6 and the inner wall of the cylinder section 5. The elastic element 11 is preferably a stainless steel spring, which can adjust the contact force between the scraper 10 and the inner wall of the cylinder section 5 according to the adhesion characteristics of different materials. Through the scraper 10 and the elastic element 11, the inner wall of the cylinder section 5 can be kept clean during long-term operation of the screw conveyor, reducing the adhesion and accumulation of material on the inner wall of the cylinder section 5, extending the equipment cleaning and maintenance cycle, and improving conveying efficiency and service life.

[0034] In an optional embodiment, the feed inlet 22 of the barrel 2 is provided with a sealing assembly 12, which includes a sealing flange 13 and a sealing ring 14. A sealing flange 13 is provided on the outside of the feed inlet 22 of the barrel 2; The sealing ring 14 is located inside the sealing flange 13; The sealing ring 14 is an inflatable flexible sealing ring 14.

[0035] In this embodiment, the sealing assembly 12 is disposed at the feed inlet 22 of the barrel 2. The sealing assembly 12 includes a sealing flange 13 and a sealing ring 14. The sealing flange 13 is disposed on the outside of the feed inlet 22 as an outer sealing structure, sealingly connecting the feed inlet 22 to the feeding equipment via a flange connection. The sealing ring 14 is disposed on the inside of the sealing flange 13 as an inner sealing structure. The sealing ring 14 is an inflatable flexible sealing ring 14, which can be expanded by introducing compressed air, so that the inner wall of the feed inlet 22 forms a tight fit with the docking port of the feeding equipment, further preventing external humid air from entering the barrel 2 and causing the material to absorb moisture and clump, while preventing dust-laden gas from escaping from the feed inlet 22 into the workshop environment. Through the double-layer sealing cooperation of the outer sealing flange 13 and the inner inflatable sealing ring 14, dust emission and external moisture intrusion during material conveying are reduced, ensuring the reliability of material conveying.

[0036] In an optional embodiment, the surface of the helical blade 6 is provided with a guide groove 15.

[0037] In this embodiment, the surface of the spiral blade 6 is provided with guide grooves 15. Multiple guide grooves 15 can be provided, and the specific shape and number of guide grooves 15 can be set according to actual production needs. The spiral blade 6 is used to guide the material close to the surface of the spiral blade 6 during the material conveying process. When the spiral blade 6 rotates and pushes the material, some material is easily attached to the surface of the spiral blade 6 under the action of extrusion and friction and gradually accumulates. The setting of the guide grooves 15 makes the surface of the spiral blade 6 form a concave-convex structure. When the material attached to the surface of the spiral blade 6 rotates to the position above the barrel 2, it naturally falls off through the guide grooves 15 under the action of gravity, or is washed away by the subsequent material, thereby reducing the adhesion and accumulation of material on the blade surface.

[0038] In an optional embodiment, a guide plate 16 is inclinedly disposed inside the feed inlet 22 of the barrel 2.

[0039] In this embodiment, the guide plate 16 is disposed inside the feed inlet 22 of the barrel 2. The guide plate 16 is inclined at a certain angle (e.g., 30°-60°) relative to the horizontal direction, so that when the material falls from the feed inlet 22, it slides into the barrel 2 along the inclined surface of the guide plate 16, avoiding the material falling vertically and directly impacting the spiral blades 6 and the bottom of the barrel 2. At the same time, the lower end of the guide plate 16 is inclined towards the rotation direction of the spiral blades 6, so that when the material slides down the guide plate 16, it obtains a velocity component consistent with the rotation direction of the spiral blades 6. Therefore, when it contacts the spiral blades 6, it can be quickly caught by the blades and pushed forward, reducing the impact rebound and eddy accumulation of the material at the bottom of the feed inlet 22, thereby improving the continuity and stability of the feeding.

[0040] In an optional embodiment, a cleaning port 17 is provided on the side wall of the cylindrical section 5; A sealing cap 18 is provided on the unblocking port 17; The unblocking port 17 and the sealing cap 18 are detachably connected.

[0041] In this embodiment, the unblocking port 17 is located on the bottom side wall of the cylinder section 5. When the equipment is running normally, the sealing cover 18 is installed on the unblocking port 17 to seal it, ensuring the airtightness of the cylinder 2 and preventing material leakage and dust dispersion. When it is necessary to inspect or clean the inside of the cylinder 2, the operator can remove the sealing cover 18 from the unblocking port 17 and observe or manually clean the material accumulation inside the cylinder section 5 through the unblocking port 17. The sealing cover 18 can be detachably connected to the unblocking port 17 by bolts or clips, and a sealing gasket is provided between the sealing cover 18 and the unblocking port 17. The unblocking port 17 can be provided at the bottom of each section of the cylinder 5 according to the length of the cylinder section 5 and the characteristics of the material, so as to facilitate targeted inspection and cleaning of each section of the cylinder 5, thereby improving the convenience of equipment maintenance.

[0042] In an optional embodiment, the discharge port 23 of the barrel 2 is provided with a discharge buffer chamber 19, and a buffer baffle 20 is inclinedly arranged inside the discharge buffer chamber 19.

[0043] In this embodiment, the discharge buffer chamber 19 is located at the discharge port 23 of the barrel 2. After the material is pushed to the discharge port 23 by the spiral blades 6, it enters the discharge buffer chamber 19. The internal space of the discharge buffer chamber 19 is larger than the diameter of the discharge port 23, which reduces the material flow rate and prevents the material from being ejected at high speed and causing dust. The buffer baffle 20 is inclinedly arranged inside the discharge buffer chamber 19 (e.g., the angle between the buffer baffle 20 and the horizontal direction is 45°), located in front of the material travel path. The material thrown out from the end of the spiral blades 6 impacts the buffer baffle 20 and slides down the inclined surface of the buffer baffle 20 under the action of gravity, preventing the material from being ejected at high speed and causing splashing dust.

[0044] In an optional embodiment, a negative pressure dust removal interface 21 is provided at the top of the discharge buffer chamber 19 for connecting a dust removal device.

[0045] In this embodiment, the negative pressure dust removal interface 21 is located at the top of the discharge buffer chamber 19. The dust removal equipment applies negative pressure to the inside of the discharge buffer chamber 19 through the negative pressure dust removal interface 21, and promptly draws the dust-laden gas generated in the discharge buffer chamber 19 due to material falling and airflow disturbance to the dust removal equipment for purification treatment, thereby preventing the dust-laden gas from escaping from the discharge port 23 into the workshop environment and further reducing the dust emission concentration.

[0046] In an optional embodiment, the inner wall of the barrel 2 is provided with an anti-stick coating.

[0047] In this embodiment, an anti-stick coating is applied to the inner wall of the barrel 2. For example, the anti-stick coating may be a PTFE composite coating, high molecular weight polyethylene, or a ceramic coating, used to reduce the adhesion between the material and the inner wall of the barrel 2. During the conveying process, the material continuously contacts and slides relative to the inner wall of the barrel 2. The smooth surface of the anti-stick coating reduces the coefficient of friction between the material and the inner wall of the barrel 2, making it difficult for the material to adhere firmly to the inner wall of the barrel 2. By applying an anti-stick coating to the inner wall of the barrel 2, the adhesion of the material to the inner wall of the barrel 2 is reduced, making it less likely for the material to form a firm accumulation layer on the inner wall of the barrel 2. Simultaneously, the smooth coating surface also reduces wear on the inner wall of the barrel 2, extending the service life of the equipment.

[0048] It should be noted that the above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A screw conveyor, wherein the screw conveyor is arranged inclined to a horizontal plane, characterized in that, include: Drive components, barrel, screw conveyor assembly, and support frame; The barrel comprises several barrel sections; The spiral conveyor assembly is disposed within the cylindrical section; The spiral conveyor assembly includes spiral blades and a spiral shaft; The spiral blades are sleeved on the spiral shaft, and the pitch of the spiral blades decreases along the material conveying direction; Two adjacent cylindrical sections are connected by the bracket, the support ribs of the bracket are arranged radially along the cylindrical section, and the helical shaft passes through the bracket and is rotatably engaged with the bracket; The driving component is connected to the end of the barrel and is drively connected to the helical shaft. The driving component is used to drive the helical shaft to rotate.

2. The screw conveyor according to claim 1, characterized in that, The edge of the spiral blade is provided with an elastic scraper assembly, which includes a scraper and an elastic element. The scraper is connected to the edge of the spiral blade via the elastic element; The scraper abuts against the inner wall of the cylindrical section.

3. The screw conveyor according to claim 1, characterized in that, The feed inlet of the barrel is provided with a sealing assembly, which includes a sealing flange and a sealing ring; The sealing flange is provided on the outside of the feed inlet of the barrel; The sealing ring is located on the inside of the sealing flange.

4. The screw conveyor according to claim 3, characterized in that, The sealing ring is an inflatable flexible sealing ring.

5. The screw conveyor according to claim 1, characterized in that, The surface of the spiral blade is provided with a flow guide groove.

6. The screw conveyor according to claim 1, characterized in that, A guide plate is inclinedly installed inside the feed inlet of the barrel.

7. The screw conveyor according to claim 1, characterized in that, The side wall of the cylindrical section is provided with a cleaning port; The unblocking port is equipped with a sealing cap; The unblocking port is detachably connected to the sealing cap.

8. The screw conveyor according to claim 1, characterized in that, The discharge port of the barrel is provided with a discharge buffer chamber, and a buffer baffle is inclinedly arranged inside the discharge buffer chamber.

9. The screw conveyor according to claim 8, characterized in that, The top of the discharge buffer chamber is equipped with a negative pressure dust removal interface for connecting to dust removal equipment.

10. The screw conveyor according to any one of claims 1 to 9, characterized in that, The inner wall of the barrel is provided with an anti-stick coating.

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