A blowing device for a star feeder

Abstract

The utility model discloses a kind of sweeping devices for star feeder, including shell, driving assembly, mounting flange, impeller, rotating shaft, the front side and downside of the mounting flange of the shell left and right two ends are all provided with interface, the interface of the mounting flange front side corresponds the material-free zone in shell inner chamber, the interface of mounting flange downside corresponds the blanking area of shell inner chamber downside, the mounting flange of the shell right end is connected with sweeping assembly through interface, the mounting flange of the shell left end is connected with pressure reduction exhaust component through interface, the end of the pressure reduction exhaust component is connected with the material receiving bin below discharge port, the rotating shaft end face where the impeller is installed is outwardly and evenly provided with blow material groove along axis. The utility model has the function of being applied in practice, the sweeping device is simple in structure, convenient to operate, more efficient, lower transformation cost;And residual material in material-free zone, blanking area, axial gap can be cleaned thoroughly, avoid its blockage.

Description

Technical Field

[0001] This utility model patent belongs to the field of material conveying technology, specifically relating to a purging device for a star feeder. Background Technology

[0002] Rotary star feeders are mostly used for conveying powdery materials, making sealing crucial. They typically have two seals. One seal is between the star-shaped baffle and the casing. Since this seal is between the star and the rotating body, it must ensure the rotation of the body while preventing significant powder leakage. Therefore, a gap of approximately 0.5mm is required. This gap keeps most of the powder within the impeller's compartment, allowing for even discharge during rotation. The other seal completely encloses the entire impeller within the casing, preventing leakage of powder and its mixture. Because the impeller is a long-shaft structure subject to temperature changes and is driven by an electric motor, a 3-5mm axial clearance must be maintained here. As the feeder's service life increases... If the powder leaks from the first stage of sealing, it will accumulate in the gap between the cylindrical casing and the impeller shaft, completely filling the reserved 3-5mm axial clearance. Without axial clearance, the rotary feeder will experience slower speed, uneven feeding, jamming, tripping, or even damage, requiring shutdown for maintenance. Based on years of experience using rotary feeders, the same material on the same model of feeder requires maintenance after approximately 30 hours of operation, while others require approximately 40 hours (due to differences in processing precision). This poses a significant threat to the stable and efficient operation of the equipment.

[0003] Existing technology, such as the dual-purpose interface star feeder disclosed in Chinese Patent (CN221051015U), includes a cylinder and a drive shaft. The cylinder has a feed inlet and a discharge outlet arranged parallel to the central axis. The drive shaft is rotatably connected to the cylinder, and several blades are arranged on the outer periphery of the drive shaft. The feed inlet and discharge outlet divide the circumferential side plate of the cylinder into a material discharge zone and a material-free zone. The material discharge zone is the area swept by the blades from the feed inlet to the discharge outlet along the rotation direction of the drive shaft. The material-free zone is provided with a dual-purpose interface, which is connected to a hopper and compressed air respectively through two pipelines.

[0004] After research, the inventors discovered the following technical defects in the above-mentioned device:

[0005] 1. This device requires an opening in the side plate of the cylinder to install the dual-purpose interface. This installation method is very inconvenient because the inner wall of the star feeder cylinder needs to be kept smooth. After the opening, the narrow space inside is not easy to grind and polish. Therefore, the operation of opening the side plate is cumbersome and requires the entire star feeder to be removed. It is not suitable for modifying equipment in industrial production.

[0006] 2. In addition, although the device can be connected to the inlet and outlet pipes through a dual-purpose interface, material will inevitably remain in the shared pipe during this process. This will cause the residual material in the axial gap of the cylinder to accumulate, resulting in slow speed, uneven feeding, jamming, machine shutdown, or even damage.

[0007] 3. On the other hand, the device can only purge the material on the blades in the materialless zone, but it ignores the fact that if the rotation speed is fast enough during the material feeding process, the material in the material feeding zone will be carried by the blades into the materialless zone. This will increase the purging cost (air consumption and electricity consumption), and also increase the risk of residual material accumulation in the axial clearance, thereby increasing the maintenance cost.

[0008] To solve the above problems, this utility model proposes a purging device for a star feeder. Utility Model Content

[0009] To address the aforementioned issues, this utility model proposes a purging device for a star feeder. In practical application, this purging device is simple in structure and easy to operate. Compared with the modification and installation of existing technologies, it is more efficient and has lower modification costs. Furthermore, it can clean the residual materials in the material-free zone, the material drop zone, and the axial gap, preventing blockage.

[0010] To achieve the above-mentioned technical effects, this utility model is implemented through the following technical solution: a purging device for a star feeder, comprising a housing, a drive assembly, mounting flanges, an impeller, and a rotating shaft. Mounting flanges are installed at both ends of the housing. The drive assembly is installed at the right end of the mounting flanges. The rotating shaft at the left end of the drive assembly is rotatably mounted in the housing via the mounting flanges. An impeller is installed on the rotating shaft in the housing. The inlet and outlet at the upper and lower ends of the housing divide the circumferential side plate of the housing cavity into a material discharge area and a material-free area. The material discharge area is along the rotation direction of the drive shaft. The impeller sweeps across the area from the inlet to the outlet. Interfaces are provided on the front and lower sides of the mounting flanges at both ends of the casing. The interface on the front side of the mounting flange corresponds to the material-free area within the casing cavity, and the interface on the lower side of the mounting flange corresponds to the material-falling area on the lower side of the casing cavity. The mounting flange at the right end of the casing is connected to the purging assembly via an interface, and the mounting flange at the left end of the casing is connected to the pressure-reducing exhaust assembly via an interface. The end of the pressure-reducing exhaust assembly is connected to the receiving bin below the outlet. Blowing grooves are evenly distributed outwards along the axis on the shaft end face where the impeller is mounted.

[0011] Preferably, the purging assembly further includes an air tank, a pressure boosting valve, a main air supply pipe, a main control air supply valve, a tee connector, an air supply pipe for the materialless zone, and an air supply pipe for the material discharge zone. The air tank is connected to the main air supply pipe via the pressure boosting valve. The main air supply pipe is equipped with a main control air supply valve. The main air supply pipe is connected to the air supply pipe for the materialless zone and the air supply pipe for the material discharge zone via a tee connector. The left ends of the air supply pipe for the materialless zone and the air supply pipe for the material discharge zone are respectively connected to the interfaces on the front and lower sides of the mounting flange.

[0012] Preferably, the gas storage tank contains inert gas or compressed air.

[0013] Preferably, the gas supply pipe in the materialless zone and the gas supply pipe in the material discharge zone are respectively equipped with a gas supply valve in the materialless zone and a gas supply valve in the material discharge zone.

[0014] Preferably, the pressure-reducing exhaust assembly further includes a material-free zone exhaust pipe, a material-falling zone exhaust pipe, a tee connector, a material-free zone exhaust valve, a material-falling zone exhaust valve, a main exhaust pipe, and a main control exhaust valve. The right ends of the material-free zone exhaust pipe and the material-falling zone exhaust pipe are respectively connected to the interfaces on the front and lower sides of the mounting flange. The left ends of the material-free zone exhaust pipe and the material-falling zone exhaust pipe are connected to the main exhaust pipe via a tee connector. The material-free zone exhaust pipe, the material-falling zone exhaust pipe, and the main exhaust pipe are respectively equipped with a material-free zone exhaust valve, a material-falling zone exhaust valve, and a main control exhaust valve.

[0015] Preferably, both the exhaust pipe in the materialless zone and the exhaust pipe in the material discharge zone are equipped with one-way valves.

[0016] Preferably, the main exhaust valve is configured as a pressure reducing valve; this structure ensures that the discharged gas is smoothly discharged into the receiving hopper, avoiding the generation of a large amount of dust by high-pressure gas.

[0017] The beneficial effects of this utility model are:

[0018] The purging device is installed on the mounting flanges at both ends of the machine casing. Its structure is simple and easy to operate. It only requires removing the mounting flanges for drilling, welding, and grinding. Compared with the modification and installation of existing technologies, it has a larger operating space during modification and does not require the entire star feeder to be removed, which can improve modification efficiency and reduce modification costs.

[0019] This purging device can purge the material-free zone, the material-falling zone, and the axial clearance through the purging components. It can clean the material remaining on the impeller in the material-free zone and the material-falling zone. It can also purge the material in the axial clearance between the end face of the impeller shaft and the machine casing through the guide of the blowing channel, so as to avoid blockage and thus prevent the slow speed, uneven feeding, jamming, machine shutdown, or even damage. At the same time, the purging of the impeller in the material-falling zone can accelerate the material falling efficiency, avoid the impeller carrying material, and reduce the risk of material accumulation and blockage. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0021] Figure 1 This is a structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the present invention with the removal of the drive component;

[0023] Figure 3 This is the front view of the present invention;

[0024] Figure 4 This utility model Figure 3 A cross-sectional view of section A;

[0025] Figure 5 This utility model Figure 4 A partial schematic diagram of C in the middle;

[0026] Figure 6 This utility model Figure 3 A cross-sectional diagram of section B, including the motion trajectory and partitions;

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Casing; 2. Drive assembly; 3. Mounting flange; 4. Impeller; 5. Shaft; 6. Interface; 7. Material blowing trough; 8. Main air supply pipe; 9. Main control air supply valve; 10. T-connector; 11. Air supply pipe in the empty zone; 12. Air supply pipe in the discharge zone; 13. Air supply valve in the empty zone; 14. Air supply valve in the discharge zone; 15. Exhaust pipe in the empty zone; 16. Exhaust pipe in the discharge zone; 17. Exhaust valve in the empty zone; 18. Exhaust valve in the discharge zone; 19. Main exhaust pipe; 20. Main control exhaust valve. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. Example

[0030] like Figures 1 to 6As shown, the prior art in this embodiment has the following problems: Based on the prior art, the inventors found the following technical defects after conducting research: The prior art requires an opening on the side plate of the cylinder and then the installation of the dual-purpose interface. This installation method is very inconvenient because the inner wall of the star feeder cylinder needs to be kept smooth, and after the opening, the narrow space inside is not easy to grind and polish. Therefore, the operation of opening the side plate is cumbersome and requires the removal of the entire star feeder, which is not suitable for modifying equipment in industrial production; In addition, although the device can be connected through a dual-purpose interface... The device has inlet and outlet air pipes, but during this process, material inevitably remains in the shared pipes, causing the residual material to accumulate in the axial gap of the cylinder. This can lead to slower rotation speed, uneven feeding, jamming, machine tripping, or even damage. Furthermore, the device can only purge the material on the blades in the material-free zone, but it ignores the fact that if the rotation speed is fast enough during the material feeding process, the material in the material dropping zone will be carried by the blades into the material-free zone. This increases the purging cost (air consumption and electricity consumption) and also increases the risk of residual material accumulation in the axial gap, thus increasing maintenance costs.

[0031] Therefore, the inventor provides a purging device for a star feeder, including a housing 1, a drive assembly 2, a mounting flange 3, an impeller 4, and a rotating shaft 5. Mounting flanges 3 are installed at both ends of the housing 1. The drive assembly 2 is installed at the right end of the mounting flange 3. The rotating shaft 5 at the left end of the drive assembly 2 is rotatably mounted in the housing 1 via the mounting flange 3. The impeller 4 is mounted on the rotating shaft 5 in the housing 1. The inlet and outlet at the upper and lower ends of the housing 1 divide the circumferential side plate of the inner cavity of the housing 1 into a material discharge zone and a material-free zone. The material discharge zone is the area from the inlet to the outlet along the rotation direction of the drive shaft. The area swept by the nozzle has interfaces 6 on the front and lower sides of the mounting flanges 3 at both ends of the housing 1. The interface 6 on the front side of the mounting flange 3 corresponds to the material-free area in the inner cavity of the housing 1, and the interface 6 on the lower side of the mounting flange 3 corresponds to the material-falling area on the lower side of the inner cavity of the housing 1. The mounting flange 3 at the right end of the housing 1 is connected to the purging assembly through the interface 6, and the mounting flange 3 at the left end of the housing 1 is connected to the pressure-reducing exhaust assembly through the interface 6. The end of the pressure-reducing exhaust assembly is connected to the receiving bin below the discharge port. The impeller 4 has blowing grooves 7 evenly arranged outward from the axis on the end face of the rotating shaft 5.

[0032] Its effect and principle are as follows: The purging device is installed on the mounting flanges 3 at both ends of the housing 1. Its structure is simple and easy to operate. It only requires removing the mounting flanges 3 for drilling, welding and grinding. Compared with the existing technology, it has a larger operating space during the modification and does not require the entire star feeder to be removed, which can improve the modification efficiency and reduce the modification cost.

[0033] This purging device can purge the material-free zone, the material-falling zone, and the axial clearance through the purging components. It can clean the material remaining on the impeller 4 in the material-free zone and the material-falling zone. It can also purge the material in the axial clearance between the end face of the rotating shaft 5 on which the impeller 4 is installed and the machine casing 1 through the guide of the blowing channel 7, so as to avoid blockage and thus prevent the slow speed, uneven feeding, jamming, machine shutdown, or even damage. At the same time, the purging of the impeller 4 in the material-falling zone can accelerate the material falling efficiency, avoid the impeller 4 carrying material, and reduce the risk of material accumulation and blockage.

[0034] Furthermore, the purging assembly also includes an air storage tank (not shown in the figure), a pressure boosting valve (not shown in the figure), a main air supply pipe 8, a main control air supply valve 9, a tee connector 10, an air supply pipe 11 for the materialless area, and an air supply pipe 12 for the material discharge area. The air storage tank is connected to the main air supply pipe 8 via the pressure boosting valve. The main air supply pipe 8 is equipped with the main control air supply valve 9. The main air supply pipe 8 is connected to the air supply pipe 11 for the materialless area and the air supply pipe 12 for the material discharge area via the tee connector 10. The left ends of the air supply pipe 11 for the materialless area and the air supply pipe 12 for the material discharge area are respectively connected to the interfaces 6 on the front and lower sides of the mounting flange 3. The design of the main control air supply valve 9 in this structure facilitates the control of the total air supply, and the design of the pressure boosting valve facilitates the adjustment of the air pressure, thereby adjusting the purging force. Moreover, the design of the air supply pipe 11 for the materialless area and the air supply pipe 12 for the material discharge area facilitates independent purging of the materialless area and the material discharge area.

[0035] Furthermore, the gas storage tank contains inert gas or compressed air; in industrial applications, inert gas is used to assist in material transport to ensure its safety.

[0036] Furthermore, an air supply valve 13 for the empty zone and an air supply valve 14 for the material discharge zone are installed on the air supply pipe 11 for the empty zone and the air supply pipe 12 for the material discharge zone, respectively. This structure is designed to allow users to independently control the purging of the empty zone and the material discharge zone.

[0037] Furthermore, the pressure-reducing exhaust assembly also includes a material-free zone exhaust pipe 15, a material-falling zone exhaust pipe 16, a tee connector 10, a material-free zone exhaust valve 17, a material-falling zone exhaust valve 18, an exhaust manifold 19, and a main control exhaust valve 20. The right ends of the material-free zone exhaust pipe 15 and the material-falling zone exhaust pipe 16 are respectively connected to the interfaces 6 on the front and lower sides of the mounting flange 3. The left ends of the material-free zone exhaust pipe 15 and the material-falling zone exhaust pipe 16 are connected to the exhaust manifold 19 through the tee connector 10. The material-free zone exhaust pipe 15, the material-falling zone exhaust pipe 16, and the exhaust manifold 19 are respectively equipped with a material-free zone exhaust valve 17, a material-falling zone exhaust valve 18, and a main control exhaust valve 20. The design of the material-free zone exhaust valve 17 and the material-falling zone exhaust valve 18 in this structure allows users to easily control the exhaust and discharge status of the material-free zone and the material-falling zone.

[0038] Furthermore, both the exhaust pipe 15 in the material-free zone and the exhaust pipe 16 in the material-falling zone are equipped with one-way valves (not shown in the figure); in order to avoid the difference in size between the material-free zone and the material-falling zone, the design of the one-way valve can prevent the gas in the exhaust pipe 15 in the material-free zone from rushing back into the exhaust pipe 16 in the material-falling zone due to the difference in air pressure between the two exhaust pipes 15 in the material-free zone and the exhaust pipe 16 in the material-falling zone.

[0039] Furthermore, the main exhaust valve 20 is configured as a pressure reducing valve; this structure ensures that the discharged gas is smoothly discharged into the receiving hopper, avoiding the generation of a large amount of dust by high-pressure gas. Example

[0040] Based on the above embodiments, the inventors have improved the rotary feeder. Taking the rotary feeder used in the blast furnace ironmaking of Yunnan Desheng Vanadium Titanium New Materials Co., Ltd. as an example: Before the improvement: it would jam after about 60 hours of operation, requiring a large amount of manpower and resources for emergency repairs; After the improvement: it has been running for nearly 2000 hours without any jamming.

[0041] Through improvements to the star feeder, the accumulated powder material is cleared in time, the resistance of the feeder's rotating impeller is significantly reduced, and the feeding is smooth and uniform. As a result of the combined effect, the failure rate of the star feeder has been significantly reduced, labor intensity has been reduced, and equipment operating rate has been increased.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A purging device for a star-shaped feeder, comprising a housing, a drive assembly, mounting flanges, an impeller, and a rotating shaft, wherein mounting flanges are installed at both ends of the housing, a drive assembly is installed at the right end of the mounting flanges, and a rotating shaft at the left end of the drive assembly is rotatably mounted in the housing via the mounting flanges. An impeller is mounted on the rotating shaft in the housing. The feed inlets and discharge outlets at the upper and lower ends of the housing divide the circumferential side plates of the housing cavity into a material discharge zone and a material-free zone. The material discharge zone is the area swept by the impeller from the feed inlet to the discharge outlet along the rotation direction of the drive shaft. The device is characterized in that: The mounting flanges at both ends of the casing have interfaces on their front and lower sides. The interface on the front side of the mounting flange corresponds to the material-free area in the inner cavity of the casing, and the interface on the lower side of the mounting flange corresponds to the material-falling area on the lower side of the inner cavity of the casing. The mounting flange at the right end of the casing is connected to the purging assembly through an interface, and the mounting flange at the left end of the casing is connected to the pressure-reducing exhaust assembly through an interface. The end of the pressure-reducing exhaust assembly is connected to the receiving hopper below the discharge port. The impeller is mounted on a shaft end face with evenly distributed blowing grooves along the axis outward.

2. The purging device for a star feeder according to claim 1, characterized in that: The purging assembly also includes an air tank, a pressure boosting valve, a main air supply pipe, a main control air supply valve, a tee connector, an air supply pipe for the materialless zone, and an air supply pipe for the material discharge zone. The air tank is connected to the main air supply pipe via the pressure boosting valve. The main air supply pipe is equipped with a main control air supply valve. The main air supply pipe is connected to the air supply pipe for the materialless zone and the air supply pipe for the material discharge zone via a tee connector. The left ends of the air supply pipe for the materialless zone and the air supply pipe for the material discharge zone are respectively connected to the interfaces on the front and lower sides of the mounting flange.

3. The purging device for a star feeder according to claim 2, characterized in that: The gas storage tank contains inert gas or compressed air.

4. The purging device for a star feeder according to claim 2, characterized in that: The gas supply pipes in the materialless zone and the material discharge zone are respectively equipped with gas supply valves in the materialless zone and the material discharge zone.

5. The purging device for a star feeder according to claim 1, characterized in that: The pressure-reducing exhaust assembly also includes a material-free zone exhaust pipe, a material-feeding zone exhaust pipe, a tee connector, a material-free zone exhaust valve, a material-feeding zone exhaust valve, a main exhaust pipe, and a main control exhaust valve. The right ends of the material-free zone exhaust pipe and the material-feeding zone exhaust pipe are respectively connected to the interfaces on the front and lower sides of the mounting flange. The left ends of the material-free zone exhaust pipe and the material-feeding zone exhaust pipe are connected to the main exhaust pipe via a tee connector. The material-free zone exhaust pipe, the material-feeding zone exhaust pipe, and the main exhaust pipe are respectively equipped with a material-free zone exhaust valve, a material-feeding zone exhaust valve, and a main control exhaust valve.

6. The purging device for a star feeder according to claim 5, characterized in that: One-way valves are installed on the exhaust pipes of the materialless zone and the material discharge zone.

7. A purging device for a star feeder according to claim 5, characterized in that: The main control exhaust valve is configured as a pressure reducing valve.

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