Self-cleaning rotary discharge valve

Abstract

The utility model belongs to the technical field of material conveying equipment, and relates to a self-cleaning rotary discharging valve which comprises a shell, a driving device, a main shaft and a blowing air source, the shell is divided into an upper feeding port, a middle shell and a lower discharging port, the main shaft with the two ends penetrating through the middle shell is arranged in the middle shell, and the blowing air source is arranged in the middle shell. Blades which are arranged at intervals along the circumference are arranged on the outer side of the main shaft, so that the middle shell is divided into a plurality of independent material grid units; and blowing devices are arranged on the main shaft and are communicated with the cavity and the material grid units, and each material grid unit at least corresponds to one blowing device, so that the self-cleaning effect is ensured. In the working process, when the corresponding material grid unit rotates to one side of the lower discharging port, the compressed air removes the adhered materials through the blowing device, the discharging efficiency is improved, and the service life of the device is prolonged. Through the innovative combination of the hollow main shaft and the blowing device, the automatic cleaning function is realized.

Description

Technical Field

[0001] This utility model belongs to the technical field of material conveying equipment and relates to a self-cleaning rotary unloading valve. Background Technology

[0002] Discharge valves are widely used material handling equipment in industrial production, primarily for controlling and regulating the flow rate of powdery, granular, or lumpy materials, and for achieving intermittent material discharge. Their applications span multiple industries, including metallurgy, chemical engineering, environmental protection, and food processing, and they are commonly found beneath silos, hoppers, conveying pipelines, or dust collection equipment. The performance of discharge valves directly impacts the stable operation of production lines, material handling efficiency, and equipment maintenance costs. Therefore, with advancements in industrial production technology, the performance requirements for discharge valves are continuously increasing.

[0003] Traditional unloading valves typically employ structures such as rotary vanes, gates, or flaps, using mechanical drives to control the flow of materials. While this design offers a degree of reliability when handling conventional materials, it gradually reveals numerous problems when dealing with special materials or complex operating conditions. In particular, traditional unloading valves are ineffective when handling viscous powdery or granular materials (such as flour, starch, slag, and coal powder), primarily due to the following reasons:

[0004] Material adhesion: Sticky materials tend to adhere to the blades, inner wall of the housing, or sealing surface of the discharge valve, resulting in unstable material flow and even blockage of the discharge channel.

[0005] Scaling phenomenon: As the operating time increases, the adhering material gradually hardens to form scale, which hinders the normal opening and closing of the unloading valve and aggravates the mechanical wear of the equipment.

[0006] Decreased unloading efficiency: Material adhesion and scaling reduce the effective flow rate of the unloading valve, directly affecting the continuity of the production line and overall production efficiency.

[0007] High maintenance costs: To ensure the normal operation of equipment, companies have to frequently carry out manual cleaning and maintenance, which not only increases labor costs but also prolongs production downtime.

[0008] To address the aforementioned issues, there is an urgent need for a self-cleaning discharge valve to improve the phenomenon of material adhesion within the valve, thereby meeting the needs of industrial production while extending the service life of the equipment. Utility Model Content

[0009] In view of this, the purpose of this utility model is to provide a self-cleaning rotary discharge valve to greatly improve the phenomenon of material sticking in the discharge valve, so as to meet the needs of industrial production and extend the service life of the equipment.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A self-cleaning rotary discharge valve includes a housing, a drive unit, a main shaft, and a jet air source;

[0012] The shell is divided into three parts: upper inlet, middle shell, and lower outlet. The middle shell is equipped with a main shaft that passes through the middle shell at both ends. The outer side of the main shaft is arranged with blades that are spaced along the circumference to divide the middle shell into multiple independent material compartments.

[0013] The main shaft is a hollow sleeve with a partition plate inside that divides the cross-section of the main shaft into multiple chambers. Each chamber corresponds to a material grid unit in the central housing. Both ends of the main shaft extend out of the housing. One end of the main shaft is connected to a drive device to drive the main shaft to rotate, and the other end is rotatably connected to a blowing gas source to provide blowing gas to the main shaft.

[0014] The main shaft is provided with multiple blowing devices that are connected to multiple chambers respectively, and each material grid unit has at least one blowing device to blow the sticky material in the material grid unit.

[0015] The blowing device includes an air guide pipe connecting the chamber and the material grid unit, a nozzle, a paddle, and a protective cover. The nozzle is connected to the air guide pipe and is arranged at one end of the air guide pipe near the material grid unit. It adopts a "duckbill" structure to blow the blades. A protective cover is arranged at the end of the air guide pipe, and the end of the air guide pipe and the protective cover form a "T"-shaped fan seal. A paddle is rotatably connected on the protective cover. The paddle is vertically installed at the position corresponding to the nozzle on the protective cover, and its lower end face is in contact with the surface of the main shaft to seal the nozzle and prevent material from entering the nozzle.

[0016] A fixed baffle is provided at the rotational connection between the main shaft and the air source. The fixed baffle is fixedly connected to the air source and is a fan-shaped plate with an opening at the bottom. When the main shaft rotates, the opening of the fixed baffle alternately communicates with the chamber on the side of the main shaft near the lower discharge port to form an airflow channel. The paddle can bounce up from bottom to top under the action of airflow, thereby releasing the seal on the nozzle.

[0017] Furthermore, there are four blades, evenly spaced along the circumference, which divide the central shell into four independent material compartment units; there are four partition plates, which divide the cross-section of the main shaft into four chambers, and the four chambers correspond one-to-one with the four material compartment units in the central shell.

[0018] Furthermore, the fixed baffle is a 270° sector-shaped plate.

[0019] Furthermore, there are two blades, evenly spaced along the circumference, which divide the central shell into two independent material compartment units; there are two partition plates, which divide the cross-section of the main shaft into two chambers, and the two chambers correspond one-to-one with the two material compartment units in the central shell.

[0020] Furthermore, the fixed baffle is a 180° sector-shaped plate.

[0021] Furthermore, the nozzle has an orifice diameter of 1 to 5 mm, and multiple blowing devices that are evenly distributed around the circumference and correspond to multiple material grid units are grouped together, with 1 to 10 groups evenly distributed along the axial direction.

[0022] Furthermore, the radius of the fixed baffle is greater than the inner radius of the main shaft and less than the outer radius of the main shaft.

[0023] Furthermore, the blowing air source is equipped with an airflow regulating valve to regulate the airflow rate of the blowing air source.

[0024] Furthermore, the blowing gas source is compressed air or nitrogen.

[0025] The beneficial effects of this utility model are as follows:

[0026] 1. This utility model provides a self-cleaning rotary discharge valve that achieves automatic cleaning through an innovative combination of a hollow main shaft and a jet-blowing device. The hollow main shaft has internal partitions forming multiple small chambers. These chambers, in conjunction with the jet-blowing device, utilize compressed gas to directionally blow material onto the material grid unit, effectively removing material adhering to the blades and shell. Furthermore, the jet-blowing device employs a duckbill-type nozzle and a paddle-shaped sealing structure to ensure efficient gas utilization and precise jetting. This design not only solves the problems of adhesion and scaling when traditional discharge valves handle viscous materials but also significantly improves the intelligence level of the equipment, demonstrating a technological breakthrough.

[0027] 2. This solution demonstrates excellent performance in practical applications, particularly suitable for processing viscous powdery or granular materials in industries such as metallurgy, chemicals, and environmental protection, significantly improving material handling efficiency. The self-cleaning mechanism effectively prevents material adhesion, ensuring smooth unloading and reducing downtime due to cleaning and maintenance. Furthermore, the equipment is highly adaptable, flexibly handling different working conditions and material characteristics to meet diverse production needs. This practical design greatly enhances stability and reliability in industrial production, providing an efficient solution for complex operating conditions.

[0028] 3. By reducing material adhesion and scaling, equipment wear is reduced, service life is extended, and maintenance costs are significantly reduced. The automatic cleaning function reduces manual intervention, improves production efficiency, and lowers labor costs. Furthermore, the modular design facilitates installation and maintenance, further enhancing economic efficiency. Overall, this technical solution provides industrial production with an efficient, stable, and economical material handling method, possessing broad application prospects and significant economic advantages, creating considerable value returns for enterprises.

[0029] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0031] Figure 1 This is a schematic diagram of the structure of a self-cleaning rotary discharge valve in the embodiment;

[0032] Figure 2 This is a three-dimensional structural diagram of a self-cleaning rotary discharge valve in the embodiment;

[0033] Figure 3 This is a partial three-dimensional structural diagram of the spindle in the embodiment.

[0034] Reference numerals: 1. Upper feed inlet; 2. Middle housing; 3. Lower discharge outlet; 4. Main shaft; 5. Blade; 6. Divider plate; 7. Drive unit; 8. Air jet source; 9. Air jet device; 901. Air guide pipe; 902. Nozzle; 903. Protective cover; 904. Paddle; 10. Airflow regulating valve; 11. Fixed baffle. Detailed Implementation

[0035] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0036] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0037] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0038] Example 1

[0039] Please see Figures 1-3 This is a self-cleaning rotary discharge valve, comprising a housing, a drive unit 7, a main shaft 4, and a jet air source 8, wherein the jet air source is compressed air or nitrogen.

[0040] The housing is divided into three parts: upper, middle and lower. The upper feed port 1 is sealed to the upstream equipment, and the lower discharge port 3 is sealed to the downstream equipment. The middle housing 2 is provided with a main shaft 4 that passes through the middle housing 2 at both ends. Four blades 5 are arranged on the outside of the main shaft 4 at circumferential intervals to divide the middle housing 2 into four independent material compartment units.

[0041] The main shaft 4 is a hollow sleeve with four partition plates 6 inside, which divide the cross-section of the main shaft into four chambers. The four chambers correspond one-to-one with the four material compartments in the central housing 2. The two ends of the main shaft 4 extend out of the housing and are sealed by bearings.

[0042] One end of the main shaft 4 is connected to the drive device 7 via a coupling. The drive device 7 is a variable frequency or constant speed motor that drives the main shaft to rotate. The other end is rotatably connected to the blowing air source 8 to provide blowing air to the main shaft 4. The dynamic and static joints at the rotatable connection between the main shaft 4 and the blowing air source 8 are sealed with bearings.

[0043] At least four blowing devices 9 are provided on the main shaft 4, each connecting to one of the four chambers, and the four blowing devices 9 correspond one-to-one with the four material grid units to blow the sticky material in the material grid units.

[0044] The blowing device 9 includes an air guide pipe 901 connecting the chamber and the material grid unit, a nozzle 902, a paddle 904, and a protective cover 903. The nozzle 902 communicates with the air guide pipe 901 and is arranged on both sides of the end of the air guide pipe 901 near the material grid unit, employing a "duckbill" structure to blow the blades 5. A protective cover 903 is arranged at the end of the air guide pipe 901, forming a "T"-shaped fan-shaped seal with the end of the air guide pipe. Paddles 904, rotatably connected by pins, are arranged on the protective cover 903. Two paddles 904 are vertically installed at the ends of the protective cover corresponding to the nozzles 902, with their lower ends in contact with the surface of the main shaft 4 to seal the nozzles 902, thereby preventing material from entering the nozzles 902. The blowing device uses compressed gas (such as compressed air or nitrogen) as its air source, with a pressure of 0.15 MPa to 0.4 MPa.

[0045] The nozzle 902 has an aperture of 1 to 5 mm, and four spraying devices 9 are evenly distributed around the circumference and correspond to four material grid units respectively. There are 1 to 10 groups evenly distributed along the axial direction to ensure that each material grid unit has at least one spraying device 9.

[0046] A fixed baffle 11 is provided at the rotational connection between the main shaft 4 and the air injection source 8. The fixed baffle 11 is fixedly connected to the air injection source 8 and does not rotate with the main shaft 4. The fixed baffle 11 is a 270° sector-shaped plate with a vertically downward opening. The radius of the sector-shaped plate is larger than the inner radius of the main shaft and smaller than the outer radius of the main shaft. When the main shaft 4 rotates, the opening of the fixed baffle 11 communicates with the chamber located on the discharge side of the main shaft to form an airflow channel, ensuring that compressed gas can smoothly enter the interior of the main shaft.

[0047] The working principle of this self-cleaning rotary discharge valve is as follows:

[0048] Start the drive device 7 to drive the main shaft 4 and blades 5 to rotate. The material enters the corresponding material grid unit through the upper feed port and gradually rotates with the main shaft 4 to the lower discharge port for unloading.

[0049] At this time, the opening of the fixed baffle 11 gradually connects with the chamber on the side of the lower discharge port 3 inside the main shaft 4 to form an airflow channel, and the air pressure will gradually increase and eventually reach a peak. The airflow is sprayed through the spraying device 9 on the main shaft near the lower discharge port 3. The compressed gas is sprayed through the air guide pipe 901 and the nozzle 902, and the nozzle 902 sprays out, which makes the sealing paddle 904 bounce up from bottom to top. At this time, the pressurized gas is quickly depressurized, and at the same time, the raw material adhering to the material grid unit is swept and sprayed from the inside to the outside to remove the material adhering to the blades and the shell. The blown-off raw material enters the next equipment or process for use.

[0050] After the blowing is completed, as the main shaft continues to rotate, the opening of the fixed baffle 11 is offset from the chamber, the blowing stops, and the paddle falls back to seal the nozzle area to prevent material from entering.

[0051] The above-mentioned blowing process is then repeated in the adjacent chamber.

[0052] Through the self-cleaning mechanism described above, this embodiment can effectively solve the problem of material adhesion, improve unloading efficiency, and extend the service life of the equipment.

[0053] Example 2

[0054] The difference between this embodiment and embodiment 1 is that in this embodiment, there are two blades 5 and two partition plates 6, so as to divide the inner cavity of the middle shell into two relatively independent material grid units, divide the inner cavity of the main shaft into two chambers, and make the chambers and material grid units correspond one-to-one.

[0055] Correspondingly, the fixed baffle 11 is a 180° sector-shaped plate with the opening vertically downward, so that the blowing air source 8 alternately connects to the two chambers of the main shaft.

[0056] Furthermore, in this embodiment, an airflow regulating valve 12 is provided on the blowing air source 8 to regulate the airflow rate of the blowing air source 8.

[0057] In another embodiment, the blades 5 and the partition plates 6 may each be set to 3 or 6, so as to divide the inner cavity of the middle shell into 3 or 6 relatively independent material grid units, divide the inner cavity of the main shaft into 3 or 6 chambers, and make the chambers and material grid units correspond one-to-one.

[0058] Correspondingly, the fixed baffle 11 is a 240° or 300° fan-shaped plate with the opening vertically downward, so that the blowing air source 8 alternately connects to multiple chambers of the main shaft.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A self-cleaning rotary discharge valve, characterized in that: Includes housing, drive unit, spindle, and jet air source; The shell is divided into three parts: upper inlet, middle shell, and lower outlet. The middle shell is equipped with a main shaft that passes through the middle shell at both ends. The outer side of the main shaft is arranged with blades that are spaced along the circumference to divide the middle shell into multiple independent material compartments. The main shaft is a hollow sleeve with a partition plate inside that divides the cross-section of the main shaft into multiple chambers. Each chamber corresponds to a material grid unit in the central housing. Both ends of the main shaft extend out of the housing. One end of the main shaft is connected to a drive device to drive the main shaft to rotate, and the other end is rotatably connected to a blowing gas source to provide blowing gas to the main shaft. The main shaft is provided with multiple blowing devices that are connected to multiple chambers respectively, and each material grid unit has at least one blowing device to blow the sticky material in the material grid unit. The blowing device includes an air guide pipe connecting the chamber and the material grid unit, a nozzle, a paddle, and a protective cover. The nozzle is connected to the air guide pipe and is arranged at one end of the air guide pipe near the material grid unit. It adopts a "duckbill" structure to blow the blades. A protective cover is arranged at the end of the air guide pipe, and the end of the air guide pipe and the protective cover form a "T"-shaped fan seal. A paddle is rotatably connected on the protective cover. The paddle is vertically installed at the position corresponding to the nozzle on the protective cover, and its lower end face is in contact with the surface of the main shaft to seal the nozzle and prevent material from entering the nozzle. A fixed baffle is provided at the rotational connection between the main shaft and the air source. The fixed baffle is fixedly connected to the air source and is a fan-shaped plate with an opening at the bottom. When the main shaft rotates, the opening of the fixed baffle alternately communicates with the chamber on the side of the main shaft near the lower discharge port to form an airflow channel. The paddle can bounce up from bottom to top under the action of airflow, thereby releasing the seal on the nozzle.

2. The self-cleaning rotary discharge valve according to claim 1, characterized in that: The number of blades is 4, which are evenly spaced along the circumference and divide the middle shell into four independent material compartment units; the number of partition plates is 4, which divide the cross-section of the main shaft into 4 chambers, and the 4 chambers correspond one-to-one with the 4 material compartment units in the middle shell.

3. The self-cleaning rotary discharge valve according to claim 2, characterized in that: The fixed baffle is a 270° sector-shaped plate.

4. The self-cleaning rotary discharge valve according to claim 1, characterized in that: There are two blades, which are evenly spaced along the circumference to divide the middle shell into two independent material compartment units; there are two partition plates, which divide the cross-section of the main shaft into two chambers, and the two chambers correspond one-to-one with the two material compartment units in the middle shell.

5. The self-cleaning rotary discharge valve according to claim 4, characterized in that: The fixed baffle is a 180° sector-shaped plate.

6. The self-cleaning rotary discharge valve according to claim 1, characterized in that: The nozzle has an orifice diameter of 1 to 5 mm. Multiple spraying devices that are evenly distributed around the circumference and correspond to multiple material grid units are grouped together, and there are 1 to 10 groups evenly distributed along the axial direction.

7. The self-cleaning rotary discharge valve according to claim 1, characterized in that: The radius of the fixed baffle is greater than the inner diameter of the main shaft and less than the outer diameter of the main shaft.

8. The self-cleaning rotary discharge valve according to claim 1, characterized in that: The blowing air source is equipped with an airflow regulating valve to regulate the airflow rate of the blowing air source.

9. The self-cleaning rotary discharge valve according to claim 1, characterized in that: The blowing gas source is compressed air or nitrogen.

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