Powder screw conveyor

Abstract

The application relates to a powder screw conveying device and relates to the calcium carbonate powder production and processing technical field, which comprises a conveying pipe assembly, a shaftless spiral blade and a driving assembly. The application reduces the adhesion of calcium carbonate powder by the anti-adhesion coating of the conveying pipe body inner wall, reduces the plugging probability, adopts the differential pitch design of the feeding section, the middle section and the discharging section of the shaftless spiral blade, cooperates with the rotating base support, improves the conveying pressure stability, reduces the interruption, the shaftless design is suitable for the easily-wound powder, the frequency conversion motor in the driving assembly is driven through a worm and a worm wheel, the rotating speed is flexibly adjusted to adapt to different powders, the conveying amount fluctuation is relieved, the detachable top cover is combined with the sealing ring and the convex block in the groove, the sealing is enhanced, the leakage is reduced, and the cleaning is convenient, the bearing base reduces the rotating friction to guarantee the stability, the connecting seat is convenient for butt joint with a production line, the overall conveying efficiency stability, adaptability and maintenance convenience are improved, and the problems of plugging, fluctuation and continuity of the existing device are solved.

Description

Technical Field

[0001] This application relates to the field of calcium carbonate powder production and processing technology, and in particular to a powder screw conveyor device. Background Technology

[0002] In the production and processing of calcium carbonate powder, powder conveying is a crucial link connecting various production stages, directly affecting the continuity, stability, and efficiency of production. Calcium carbonate powder is characterized by its fine particle size, large variations in flowability, and tendency to generate dust, which places high demands on conveying equipment. Currently, common conveying methods in the calcium carbonate powder industry include pneumatic conveying, belt conveying, and screw conveying. Among these, screw conveying has gained some application due to its advantages such as simple structure, small footprint, and ability to achieve closed conveying. However, existing screw conveying devices still have some areas for improvement when conveying calcium carbonate powder.

[0003] Existing screw conveyor devices are prone to fluctuations in conveying volume when transporting calcium carbonate powder of different particle sizes and moisture content. When the powder has high moisture content, it may also cause material agglomeration and blockage, leading to conveying interruptions and affecting the continuity of production. To solve these problems, a new screw conveyor device for powder is proposed. Utility Model Content

[0004] The purpose of this application is to provide a powder screw conveyor with relatively stable conveying efficiency, which solves the problems mentioned in the background art.

[0005] The powder screw conveyor provided in this application adopts the following technical solution: A powder screw conveyor includes a conveying pipe assembly, a shaftless screw blade, and a drive assembly. The conveying pipe assembly includes a conveying pipe body and an anti-stick coating coated on the inner wall of the conveying pipe body. The shaftless screw blade is disposed inside the conveying pipe body. The inside of the shaftless screw blade includes a feeding section, an intermediate section, and a discharging section. The pitch of the feeding section is greater than the pitch of the intermediate section, the pitch of the discharging section is greater than the pitch of the intermediate section, and the pitch of the discharging section is less than the pitch of the feeding section. A rotating base is fixedly connected to the ends of the feeding section and the discharging section that are far apart from each other.

[0006] The drive assembly includes a drive box fixedly connected to the outer surface of the conveying pipe body. A worm wheel and a worm are installed inside the drive box. The inner wall of the worm wheel is fixedly connected to the outer surface of the corresponding rotating base. The worm wheel meshes with the worm. A variable frequency motor is fixedly connected to the outer surface of the drive box. The output shaft end of the variable frequency motor is fixedly connected to the rotating shaft end of the worm.

[0007] By adopting the above technical solutions, the anti-stick coating on the inner wall of the conveying pipe can reduce the adhesion of calcium carbonate powder, especially for powders with high moisture content, reducing the probability of material blockage. The feed section, intermediate section, and discharge section of the shaftless spiral blade adopt a differentiated screw pitch design. The larger screw pitch in the feed section can quickly receive materials, while the smaller screw pitch in the intermediate section can increase the conveying pressure to stabilize the material flow. The screw pitch adaptation design in the discharge section ensures smooth material discharge and reduces conveying interruptions. At the same time, the shaftless design is suitable for easily entangled powders, making it more practical. In the drive component, the variable frequency motor drives the shaftless spiral blade through a worm gear and worm wheel, which can flexibly adjust the speed to adapt to the conveying needs of powders with different particle sizes and moisture content, alleviate the problem of conveying volume fluctuations, and improve the overall stability of conveying efficiency.

[0008] Preferably, a detachable top cover is installed on the upper surface of the conveying pipe body, the top of the top cover is connected to a feed inlet, and the bottom of the conveying pipe body is connected to a discharge outlet.

[0009] By adopting the above technical solution, the detachable top cover makes it easy to open the conveying pipe body, which facilitates the cleaning of residual calcium carbonate powder inside and avoids material adhesion and blockage caused by long-term residue. The feed inlet is located at the top of the top cover, which can smoothly receive external powder. The discharge outlet is located at the bottom of the conveying pipe body, which conforms to the gravity flow characteristics of powder, reduces accumulation and blockage during discharge, and ensures the continuity of the conveying process.

[0010] Preferably, a groove is formed on the upper surface of the conveying pipe body, and a sealing ring is fixedly connected to the inner wall of the groove.

[0011] By adopting the above technical solution, the sealing ring fixed in the groove on the upper surface of the conveying pipe body can enhance the sealing between the conveying pipe body and the top cover, prevent calcium carbonate powder from leaking from the gaps during the conveying process, reduce dust pollution and material loss, and at the same time prevent external dust and other impurities from entering the pipe and contaminating the powder, thus ensuring the cleanliness of the conveying.

[0012] Preferably, a protrusion is fixedly connected to the bottom surface of the top cover, and the protrusion is inserted into the inner wall of the groove and abuts against the sealing ring.

[0013] By adopting the above technical solution, the protrusion on the bottom surface of the top cover is inserted into the groove, which can quickly locate the installation position of the top cover and ensure accurate installation. When the protrusion abuts against the sealing ring, it can compress the sealing ring, further improving the sealing performance, reducing the possibility of powder leakage, and at the same time enhancing the stability of the connection between the top cover and the conveying pipe body, avoiding gaps caused by vibration during equipment operation.

[0014] Preferably, the shaftless helical blade is rotatably mounted on the inner wall of the conveying pipe body via two rotating bases.

[0015] By adopting the above technical solution, the shaftless spiral blade is rotatably mounted on the inner wall of the conveying pipe body via a rotating base. The shaftless design can reduce the entanglement and accumulation of powder in the center of the blade, which is especially suitable for conveying fine-grained calcium carbonate powder. The two rotating bases support the two ends of the shaftless spiral blade respectively, which can ensure the stability of the shaftless spiral blade during rotation, avoid uneven material conveying caused by blade shaking, reduce the risk of material blockage, and ensure the smoothness of the conveying process.

[0016] Preferably, a detachable cover is installed on one side of the drive box.

[0017] By adopting the above technical solution, the detachable cover on one side of the drive box makes it easy to open the drive box, which facilitates the inspection, maintenance or replacement of internal transmission components such as worm gears and worm wheels. It can promptly handle drive abnormalities caused by component wear or failure, reduce equipment downtime for maintenance, ensure the continuity of powder conveying, and reduce the impact on production progress.

[0018] Preferably, a bearing base is installed on one side of the conveying pipe body, and the inner wall of the bearing base is fixedly connected to the shaft end of the corresponding rotating base.

[0019] By adopting the above technical solutions, the frictional resistance during the rotation of the rotating base can be effectively reduced, making the rotation of the shaftless helical blades smoother and reducing speed fluctuations caused by excessive friction, thereby stabilizing the powder conveying volume. At the same time, the bearing base can provide effective support for the rotating base, preventing the blades from shifting during rotation and further ensuring the stability of the conveying.

[0020] Preferably, a control unit is fixedly connected to the upper surface of the drive box, and connecting seats are fixedly connected to both sides of the outer surface of the conveying pipe body.

[0021] By adopting the above technical solution, the control unit on the drive box can control the working status of the variable frequency motor in real time, optimize the feeding process, and the connecting seats on both sides of the conveying pipe body can facilitate the docking of the device with the production equipment at the front and rear ends, enhance the adaptability of the device in the calcium carbonate powder production line, facilitate its integration into the large-scale production process, and improve the overall production efficiency.

[0022] In summary, this application includes at least one of the following beneficial technical effects: This powder screw conveyor reduces calcium carbonate powder adhesion through an anti-stick coating on the inner wall of the conveying pipe, lowering the probability of material blockage. The shaftless screw blades feature differentiated pitch designs in the feeding, intermediate, and discharge sections, combined with a rotating base support, improving conveying pressure stability and reducing interruptions. The shaftless design is suitable for easily entangled powders. The variable frequency motor in the drive assembly is driven by a worm gear and worm wheel, flexibly adjusting the speed to adapt to different powders and mitigating conveying volume fluctuations. The detachable top cover, combined with the sealing ring and protrusions in the groove, enhances sealing, reduces leakage, and facilitates cleaning. The bearing base reduces rotational friction to ensure stability, and the connecting seat facilitates connection to the production line. Overall, it improves conveying efficiency, stability, adaptability, and ease of maintenance, solving the problems of material blockage, fluctuations, and continuity in existing devices. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall front view structure of this application; Figure 2 This is a schematic diagram of the overall structure of this application from below; Figure 3 This is a schematic diagram of a partially exploded structure in this application; Figure 4 This is a partial top view of the structural plan of this application; Figure 5 This is a schematic diagram of the shaftless helical blade assembly of this application.

[0024] In the picture: 1. Conveying pipe assembly; 101. Conveying pipe body; 102. Top cover; 103. Anti-stick coating; 104. Groove; 105. Sealing ring; 106. Protrusion; 2. Shaftless spiral blade; 201. Feeding section; 202. Intermediate section; 203. Discharge section; 204. Rotating base; 3. Drive assembly; 301. Drive box; 302. Box cover; 303. Variable frequency motor; 304. Worm; 305. Worm wheel; 4. Bearing base; 5. Control unit; 6. Feed inlet; 7. Discharge outlet; 8. Connecting seat. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail below.

[0026] Example 1: A powder screw conveyor device, referring to Figure 1 , Figure 3 and Figure 4The system includes a conveying pipe assembly 1, a shaftless helical blade 2, and a drive assembly 3. The conveying pipe assembly 1 includes a conveying pipe body 101 and an anti-stick coating 103 coated on the inner wall of the conveying pipe body 101. The shaftless helical blade 2 is disposed inside the conveying pipe body 101. The interior of the shaftless helical blade 2 includes a feeding section 201, an intermediate section 202, and a discharging section 203. The pitch of the feeding section 201 is greater than the pitch of the intermediate section 202, and the pitch of the discharging section 203 is greater than the pitch of the intermediate section 202 and less than the pitch of the feeding section 201. Rotating bases 204 are fixedly connected to the ends of the feeding section 201 and the discharging section 203 that are far apart from each other. The shaftless helical blade 2 is rotatably sleeved in the inner wall of the conveying pipe body 101 through the two rotating bases 204. The shaftless design of the inner wall of the conveying pipe body 101 reduces the entanglement and accumulation of powder at the center of the blades, making it particularly suitable for conveying fine-grained calcium carbonate powder. Two rotating bases 204 support the two ends of the shaftless helical blades 2 respectively, ensuring the stability of the shaftless helical blades 2 during rotation, avoiding uneven material conveying caused by blade swaying, reducing the risk of material blockage, and ensuring the smoothness of the conveying process. A bearing base 4 is installed on one side of the conveying pipe body 101. The inner wall of the bearing base 4 is fixedly connected to the rotating shaft end of the corresponding rotating base 204, which can effectively reduce the frictional resistance of the rotating base 204 during rotation, making the rotation of the shaftless helical blades 2 smoother, reducing speed fluctuations caused by excessive friction, and thus stabilizing the powder conveying volume. At the same time, the bearing base 4 can effectively support the rotating base 204, preventing the blades from deviating during rotation, further ensuring the stability of the conveying.

[0027] Reference Figure 2 , Figure 3 and Figure 5 The drive assembly 3 includes a drive box 301 fixedly connected to the outer surface of the conveying pipe body 101. A worm gear 305 and a worm 304 are installed inside the drive box 301. The inner wall of the worm gear 305 is fixedly connected to the outer surface of the corresponding rotating base 204. The worm gear 305 meshes with the worm 304. A variable frequency motor 303 is fixedly connected to the outer surface of the drive box 301. The output shaft end of the variable frequency motor 303 is fixedly connected to the rotating shaft end of the worm 304. A detachable cover 302 is installed on one side of the drive box 301. The detachable cover 302 on one side of the drive box 301 makes it easy to open the drive box 301, which facilitates the inspection, maintenance or replacement of the internal transmission components such as the worm 304 and worm gear 305. It can promptly handle drive abnormalities caused by component wear or failure, reduce equipment downtime for maintenance, ensure the continuity of powder conveying, and reduce the impact on production progress.

[0028] Example 2: A powder screw conveyor device, referring to Figure 1 , Figure 2 and Figure 3Based on the same concept as Embodiment 1 above, this embodiment proposes that a detachable top cover 102 be installed on the upper surface of the conveying pipe body 101. The top of the top cover 102 is connected to an inlet 6, and the bottom of the conveying pipe body 101 is connected to an outlet 7. The detachable top cover 102 facilitates opening the conveying pipe body 101, making it convenient to clean the residual calcium carbonate powder inside and avoiding long-term residue buildup and blockage. The inlet 6 is located at the top of the top cover 102, allowing for smooth reception of external powder, while the outlet 7 is located at the bottom of the conveying pipe body 101, conforming to the powder... The gravity flow characteristics reduce material accumulation and blockage during discharge, ensuring the continuity of the conveying process. A groove 104 is provided on the upper surface of the conveying pipe body 101, and a sealing ring 105 is fixedly connected to the inner wall of the groove 104. The sealing ring 105 fixed in the groove 104 on the upper surface of the conveying pipe body 101 can enhance the sealing between the conveying pipe body 101 and the top cover 102, prevent calcium carbonate powder from leaking from gaps during the conveying process, reduce dust pollution and material loss, and at the same time prevent external dust and other impurities from entering the pipe and contaminating the powder, ensuring the cleanliness of the conveying process.

[0029] Reference Figure 1 , Figure 2 and Figure 3 A protrusion 106 is fixedly connected to the bottom surface of the top cover 102. The protrusion 106 is inserted into the inner wall of the groove 104 and abuts against the sealing ring 105. The protrusion 106 on the bottom surface of the top cover 102 is inserted into the groove 104, which can quickly position the installation position of the top cover 102 and ensure accurate installation. When the protrusion 106 abuts against the sealing ring 105, it can compress the sealing ring 105, further improving the sealing performance, reducing the possibility of powder leakage, and at the same time enhancing the stability of the connection between the top cover 102 and the conveying pipe body 101, avoiding... To prevent gaps caused by vibration during equipment operation, a control unit 5 is fixedly connected to the upper surface of the drive box 301, and connecting seats 8 are fixedly connected to both sides of the outer surface of the conveying pipe body 101. The control unit 5 on the drive box 301 can control the working status of the variable frequency motor 303 in real time and optimize the feeding process. The connecting seats 8 on both sides of the conveying pipe body 101 facilitate the docking of the device with the production equipment at the front and rear ends, enhance the adaptability of the device in the calcium carbonate powder production line, facilitate integration into the large-scale production process, and improve the overall production efficiency.

[0030] The implementation principle of this embodiment is as follows: First, the calcium carbonate powder is connected to the front and rear production equipment through the connecting seat 8. The calcium carbonate powder enters the conveying pipe body 101 through the feed port 6. At this time, the protrusion 106 on the bottom surface of the top cover 102 is inserted into the groove 104 on the upper surface of the conveying pipe body 101 and abuts against the sealing ring 105 to form an effective seal, preventing powder leakage or the entry of external impurities. The anti-stick coating 103 on the inner wall of the conveying pipe body 101 reduces powder adhesion to the pipe wall and reduces the risk of adhesion. After the drive component 3 is started, the variable frequency motor 303 outputs power to drive the worm 304 to rotate. The worm 304 meshes with the worm wheel 305, causing the worm wheel 305 to drive the rotating base 204 fixed thereto to rotate, thereby driving the shaftless spiral blade 2 to rotate inside the conveying pipe body 101. The feed section 201 of the shaftless spiral blade 2 has a large pitch, which allows it to quickly receive incoming powder. As the blades rotate, the powder is pushed to the middle section 202, where the pitch is smaller, gradually increasing the powder pressure inside the pipe and ensuring stable forward flow of the material. Finally, the powder reaches the discharge section 203, where the pitch is designed to ensure smooth discharge from the discharge port 7. During rotation, the bearing base 4 supports the rotating base 204, reducing rotational friction and ensuring smooth blade operation. The control unit 5 can adjust the speed of the variable frequency motor 303. When cleaning or maintenance is required, the top cover 102 can be removed to clean the inside of the conveying pipe body 101. Opening the cover 302 of the drive box 301 allows for inspection and maintenance of components such as the worm gear 304 and worm wheel 305, ensuring continuous and stable operation of the device.

Claims

1. A powder screw conveyor, comprising a conveying pipe assembly (1), shaftless screw blades (2), and a drive assembly (3), characterized in that: The conveying pipe assembly (1) includes a conveying pipe body (101) and an anti-stick coating (103) coated on the inner wall of the conveying pipe body (101). The shaftless spiral blade (2) is disposed inside the conveying pipe body (101). The shaftless spiral blade (2) includes a feeding section (201), an intermediate section (202), and a discharging section (203). The pitch of the feeding section (201) is greater than that of the intermediate section (202). The pitch of the discharging section (203) is greater than that of the intermediate section (202). The pitch of the discharging section (203) is less than that of the feeding section (201). A rotating base (204) is fixedly connected to the ends of the feeding section (201) and the discharging section (203) that are far apart from each other. The drive assembly (3) includes a drive box (301) fixedly connected to the outer surface of the conveying pipe body (101). A worm wheel (305) and a worm (304) are installed inside the drive box (301). The inner wall of the worm wheel (305) is fixedly connected to the outer surface of the corresponding rotating base (204). The worm wheel (305) meshes with the worm (304). A variable frequency motor (303) is fixedly connected to the outer surface of the drive box (301). The output shaft end of the variable frequency motor (303) is fixedly connected to the rotating shaft end of the worm (304).

2. The powder screw conveyor according to claim 1, characterized in that: The upper surface of the conveying pipe body (101) is equipped with a detachable top cover (102), the top of the top cover (102) is connected to the inlet (6), and the bottom of the conveying pipe body (101) is connected to the outlet (7).

3. The powder screw conveyor according to claim 1, characterized in that: The upper surface of the conveying pipe body (101) is provided with a groove (104), and a sealing ring (105) is fixedly connected to the inner wall of the groove (104).

4. The powder screw conveyor according to claim 2, characterized in that: The bottom surface of the top cover (102) is fixedly connected with a protrusion (106), which is inserted into the inner wall of the groove (104) and abuts against the sealing ring (105).

5. The powder screw conveyor according to claim 1, characterized in that: The shaftless helical blade (2) is rotatably mounted on the inner wall of the conveying pipe body (101) via two rotating bases (204).

6. The powder screw conveyor according to claim 1, characterized in that: A removable cover (302) is installed on one side of the drive box (301).

7. A powder screw conveyor according to claim 1, characterized in that: A bearing base (4) is installed on one side of the conveying pipe body (101), and the inner wall of the bearing base (4) is fixedly connected to the shaft end of the corresponding rotating base (204).

8. A powder screw conveyor according to claim 1, characterized in that: The upper surface of the drive box (301) is fixedly connected to the control unit (5), and both sides of the outer surface of the conveying pipe body (101) are fixedly connected to the connecting seat (8).

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