Bottom-blown rotary valve

Abstract

This invention relates to the field of rotary valve technology, specifically disclosing a bottom-blowing rotary valve, comprising: a valve body having an axially opposite inlet end and an outlet end, the interior of which is configured as a cavity, a feed inlet at the top, and an axial grooved flow channel smoothly transitioning to the bottom of the cavity; end plates, detachably disposed on the inlet end and the outlet end to seal the cavity, the end plates at the inlet end and the outlet end respectively having an air inlet and a discharge outlet smoothly transitioning to the two ends of the axial grooved flow channel; a rotor disposed in the cavity, the two ends of the rotor being rotatably connected to the two end plates respectively; and a drive unit for driving the rotor to rotate, the rotation of the rotor realizing communication between the feed inlet at the top of the valve body and the axial grooved flow channel at the bottom.

Description

Technical Field

[0001] This invention relates to the field of rotary valve technology, specifically to a bottom-blowing rotary valve. More specifically, this invention relates to the field of solid material conveying technology, particularly the continuous pneumatic conveying of bulk solid materials. Background Technology

[0002] Rotary valves are industrial equipment widely used in the storage and conveying of bulk solid materials such as powders and granules. Through the control of the drive system, they can achieve stable and continuous material conveying according to the operating speed set by the system.

[0003] In industrial production, there are many applications requiring continuous and stable conveying and control of bulk solid materials, and rotary valve equipment is widely used in these areas (such as metallurgy, chemical industry, food, and grain industries). In the chemical industry, a typical example is its use in the batching, mixing, and metering of chemical raw materials, catalysts, and additives. Due to its wide range of applications, improving the key functions of rotary valves, such as high-pressure blowing performance, continuity, and stability, has significant practical implications.

[0004] Currently, the traditional rotary valve design features two straight pipe sections of the same diameter on each side of the valve body's end plates. The gas and material inlets / outlets on both sides of the end plates are designed as straight or oblique holes without any flow channel coupling. The rotor blades are directly welded to the central shaft without coupling at the root. This design causes severe airflow turbulence and significant pressure loss due to abrupt changes at the pipe connections, and at certain flow rates, it can even produce a whistling sound. Furthermore, the lack of coupling between the blades and the shaft root means that material not promptly emptied from the discharge channel, as well as material remaining in "dead zones," will be carried back to the valve body's inlet (feed port) by the rotor blades, significantly reducing the rotary valve's conveying capacity. Simultaneously, the lack of coupling between the rotor's central shaft and the outlet end plate's discharge port leads to noticeable material residue and low-frequency pulsation during rotor discharge, which are detrimental to production. Therefore, there is an urgent need to develop a high-flow-rate bottom-blowing rotary valve. Summary of the Invention

[0005] The purpose of this invention is to design a bottom-blowing rotary valve to solve the problems existing in the structure of traditional rotary valves. This bottom-blowing rotary valve can realize continuous and stable feeding of bulk solid materials under high-pressure conveying conditions, reliable blowing function, smooth material mixing and conveying, and transport bulk solid materials to designated areas for use by downstream silos or packaging systems.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: This invention designs a bottom-blowing rotary valve, which includes the following structural configuration: The valve body has an axially opposite inlet end and outlet end, and its interior is set as a cavity with a feed port at the top. The bottom of the cavity is also provided with an axial groove flow channel that is smoothly connected to it. End plates are detachably disposed on the inlet end and the outlet end to seal the cavity. The end plates at the inlet end and the outlet end are respectively provided with an air inlet and a material outlet that are smoothly connected to both ends of the axial groove flow channel. A rotor is disposed in the cavity, and both ends of the rotor are rotatably connected to two end plates respectively; And a drive unit for driving the rotor to rotate, the rotation of the rotor realizing the connection between the feed port at the top of the valve body and the axial groove flow channel at the bottom.

[0007] Specifically, the bottom-blowing rotary valve designed in this invention has a valve body with a feed inlet at the top and an axial grooved flow channel at the bottom. A rotor is positioned near the center of the valve body's cavity to achieve dynamic communication between the feed inlet channel and the axial grooved flow channel at the bottom of the valve body. Two end plates are respectively installed on both sides of the valve body's axial direction to support and seal the rotor located inside the valve body cavity. This bottom-blowing rotary valve enables continuous feeding of bulk solid materials, improves operational reliability and stability, and reduces abnormal phenomena such as backflow, noise, and pulsation during material conveying.

[0008] Specifically, the cross-section of the axial groove flow channel is semi-circular, with its two ends smoothly transitioning to the air inlet and the material outlet, respectively. The air inlet is the entrance for compressed gas, and the material outlet is the outlet for the mixture of gas and solid material. The interior of the axial groove flow channel is smooth.

[0009] Furthermore, a bottom-blowing rotary valve has a connecting flange on the top of the valve body.

[0010] Furthermore, a bottom-blowing rotary valve: the end plate is provided with a shaft hole, and both ends of the rotor are rotatably disposed in the shaft hole; the air inlet and the discharge outlet are disposed below the shaft hole.

[0011] Specifically, each of the two end plates has a shaft hole at its center for mounting the rotor shaft. The two end plates have an air inlet and a discharge outlet located slightly below the center, respectively. These are irregularly shaped. The side of the air inlet and discharge outlet closest to the valve body (cavity) is coupled with the arc-shaped structure at the root of the rotor. This ensures that the inner walls of the air inlet and discharge outlet can smoothly connect with the groove of the rotor (which is the gap between adjacent blades) (i.e., a coupling relationship), thus avoiding abnormal phenomena such as backflow, noise, and pulsation that are easily caused during gas blowing in the non-coupled state.

[0012] Furthermore, a bottom-blowing rotary valve: the rotor includes a rotating shaft and several blades arranged circumferentially on the rotating shaft, the two ends of the rotating shaft are respectively rotatably arranged in the shaft hole, the blades are located in the cavity, and an arc-shaped transition connection structure is formed between the roots of adjacent blades.

[0013] Specifically, in this invention, the rotor is designed in a star shape, with 5 to 14 blades. The central shaft is located in the middle, and the root of the blades has an arc shape. The arc is located at about 1 / 3 of the blade. This arc shape is coupled with the inner edge contour of the air inlet and the discharge outlet on the end plate, realizing a smooth transition between the air inlet and the discharge outlet and the blade gap. This eliminates the "dead corner" area in the traditional rotary valve structure, prevents material accumulation, and avoids the problem of significant reduction in the conveying capacity of the rotary valve.

[0014] Furthermore, a bottom-blowing rotary valve: the air inlet and the discharge outlet are respectively configured with irregular shapes; the upper contour of the air inlet and the discharge outlet near the cavity is coupled with the arc shape of the root of the blade, so that the gap between the air inlet and the discharge outlet and the blade is smoothly transitioned, and the lower contour is smoothly transitioned with both ends of the axial groove flow channel (that is, the bottom of the air inlet and the discharge outlet near the cavity is coupled with the axial groove flow channel).

[0015] Furthermore, a bottom-blowing rotary valve: the drive unit is disposed on the end plate at the inlet end, and includes a motor and a reducer, wherein the motor is connected to the rotating shaft through the reducer.

[0016] Furthermore, a bottom-blowing rotary valve further includes an inlet reducer section, which is connected to the air inlet for introducing compressed air into the axial groove flow channel; the inlet reducer section includes a small tube, a tapered tube, and a first flange connected in sequence, the first flange being connected to the end plate at the inlet end and communicating with the air inlet.

[0017] Specifically, the first flange of the inlet reducer is set on the end plate at the inlet end of the valve body, and the small diameter pipe of the inlet reducer is located at the bottom, which is the main inlet for compressed gas to enter the valve body and rotor.

[0018] Furthermore, a bottom-blowing rotary valve includes an inlet reducer section that further comprises a first sealing ring disposed between the first flange and the end plate.

[0019] Furthermore, a bottom-blowing rotary valve further includes an outlet straight pipe section, which is connected to the discharge port for guiding a mixture of gas and solid materials to a downstream storage system; the outlet straight pipe section includes a straight pipe and a second flange, the second flange being connected to the end plate at the outlet end and communicating with the discharge port.

[0020] Specifically, the second flange of the outlet straight pipe section is installed on the end plate at the outlet end of the valve body. The straight pipe of the outlet straight pipe section guides the mixture of gas and solid materials passing through the valve body and rotor to the downstream storage system, realizing continuous and stable material transportation.

[0021] Furthermore, a bottom-blowing rotary valve includes a second sealing ring disposed between the second flange and the end plate.

[0022] The beneficial effects of this invention are: This invention relates to a bottom-blowing rotary valve. By incorporating an axial grooved flow channel at the bottom of the valve body cavity and an air inlet and a discharge outlet at each end, it enables continuous and stable feeding of bulk solid materials under high-pressure conveying conditions. This improves operational reliability and stability, and reduces abnormal phenomena such as leakage and jamming during material conveying. Furthermore, the bottom-blowing rotary valve features a smooth transition design (coupling design) between the axial grooved flow channel and the cavity, as well as between the air inlet / discharge outlet and the rotor blades on the cavity side. This avoids the problem of severe airflow turbulence and large pressure loss caused by abrupt changes at the air inlet / discharge outlet connection, and also eliminates the whistling sound. This smooth transition design also eliminates "dead zone" areas, ensuring smooth conveying of solid materials, preventing material accumulation, and guaranteeing the valve body's self-cleaning function.

[0023] The bottom-blowing rotary valve designed in this invention enables continuous feeding of bulk solid materials, improves the reliability and stability of rotary valve operation, reduces abnormal phenomena such as backflow, noise, and pulsation during material conveying, and allows bulk solid materials to be continuously conveyed to downstream areas for use by downstream equipment, thus meeting the requirements for safe, efficient, stable and reliable conveying of solid materials. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1A schematic diagram of the bottom-blowing rotary valve designed for Example 1; Figure 2 A cross-sectional view of the bottom-blowing rotary valve designed for Example 1; Figure 3 This is a schematic diagram of the valve body structure in the bottom-blowing rotary valve designed for Example 1; Figure 4 A schematic diagram of the rotor structure in this bottom-blowing rotary valve designed for Example 1; Figure 5 A schematic diagram of the structure of the middle end plate of the bottom-blowing rotary valve designed in Example 1; Figure 6 A cross-sectional view of the end plate of the bottom-blowing rotary valve designed for Example 1; Figure 7 A schematic diagram of the inlet reducer section in this bottom-blowing rotary valve designed for Example 1; Figure 8 The structural diagram of the outlet straight pipe section in this bottom-blowing rotary valve designed for Example 1; Figure 9 This is a schematic diagram showing the coupling of the outline of the air inlet near the cavity side with the arc shape of the blade root in the bottom-blowing rotary valve designed for Example 1.

[0026] The markings in the image are as follows: 1-Valve body, 2-End plate, 3-Rotor, 4-Drive unit, 5-Inlet reducer section, 6-Outlet straight pipe section, 11-Inlet end, 12-Outlet end, 13-Cavity, 14-Feed inlet, 15-Axial groove flow channel, 16-Connecting flange, 21-Shaft hole, 22-Air inlet, 23-Discharge outlet, 31-Rotating shaft, 32-Blade, 33-Arc shape, 34-Gap, 41-Motor, 42-Reducer, 51-Small pipe, 52-Conical pipe, 53-First flange, 54-First sealing ring, 61-Straight pipe, 62-Second flange, 63-Second sealing ring. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "top," and "bottom," etc., indicating orientation or positional relationships, are merely for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein.

[0029] Example 1

[0030] like Figures 1-9 As shown, this embodiment 1 designs a bottom-blowing rotary valve, which includes the following structural configuration: The valve body 1 has an inlet end 11 and an outlet end 12 that are opposite each other in the axial direction. Its interior is configured as a cavity 13 and a feed port 14 is provided at the top. The bottom of the cavity 13 is also provided with an axial groove flow channel 15 that is smoothly connected to the inner wall of the cavity 13. The top of the valve body 1 is also provided with a connecting flange 16. End plate 2, with a shaft hole 21 at its center, the end plate 2 includes two pieces, which are detachably disposed on the inlet end 11 and the outlet end 12 respectively to seal the cavity 13. The end plate 2 at the inlet end 11 and the outlet end 12 are also provided with an air inlet 22 and a discharge outlet 23 that are smoothly connected to the two ends of the axial groove flow channel 15. The air inlet 22 and the discharge outlet 23 are disposed at a position slightly below the shaft hole 21 on the end plate 2. The rotor 3 includes a rotating shaft 31 and several blades 32 arranged circumferentially on the rotating shaft 31. The two ends of the rotating shaft 31 are rotatably disposed in the shaft holes 21 of two end plates 2. The blades 32 are located in a cavity 13, and an arc-shaped transition connection structure 33 is formed between the roots of adjacent blades 32. The gap 34 between adjacent blades 32 serves as a groove for the rotor 3. The air inlet 22 and the discharge outlet 23 are respectively configured with irregular shapes. The upper contour of the air inlet 22 and the discharge outlet 23 near the cavity 13 is coupled to the arc-shaped 33 at the root of the blades 32 (e.g., ...). Figure 9This design ensures a smooth transition between the air inlet 22 and outlet 23 and the gap 34 between the blade 32 and the outlet 23, eliminating any "dead zone" areas. The lower contours of the blades smoothly transition to both ends of the axial groove channel 15, without any abnormal protrusions. This design avoids severe airflow turbulence, pressure loss, and whistling sounds. The end plate 2, on the side away from the cavity 13, also has an inlet reducer section 5 for introducing compressed air into the axial groove channel 15. This section includes a small pipe 51, a tapered pipe 52, a first flange 53, and a first sealing pipe, all connected sequentially. A sealing ring 54 is provided. The first flange 53 is connected to the end plate 2 of the inlet end 11 and communicates with the air inlet 22. The first sealing ring 54 is disposed between the first flange 53 and the end plate 2. The other end plate 2 is provided with an outlet straight pipe section 6 for guiding the mixture of gas and solid materials to the downstream storage system. It includes a straight pipe 61, a second flange 62 and a second sealing ring 63. The second flange 62 is connected to the end plate 2 of the outlet end 12 and communicates with the discharge port 23. The second sealing ring 63 is disposed between the second flange 62 and the end plate 2. And a drive unit 4, which is disposed on the end plate 2 of the inlet end 11, for driving the rotor 3 to rotate. It includes a motor 41 and a reducer 42. The motor 41 is connected to the rotating shaft 31 through the reducer 42. The rotation of the rotor 3 realizes the connection between the feed port 14 at the top of the valve body 1 and the axial groove flow channel 15 at the bottom.

[0031] The above Figure 9 Area A in the image shows that the outline of the air inlet 22 near the cavity 13 is coupled with the arc 33 at the root of the blade, with a smooth transition and no "dead corner" area.

[0032] The bottom-blowing rotary valve designed in Embodiment 1 includes a valve body 1, an end plate 2, a rotor 3, a drive unit 4, an inlet reducing pipe section 5, and an outlet straight pipe section 6. Bulk solid materials are transported from an upstream silo to the valve body inlet 14 of the rotary valve through a pipeline. The solid materials then enter the rotor groove (i.e., the gap 34 formed between adjacent blades 32) inside the valve body. Driven by drive components such as a motor and reducer, the solid materials enter the axial groove flow channel 15 at the bottom of the valve body 1 through the rotation of the rotor 3. Compressed gas enters from the inlet reducing pipe. The gas enters through the small pipe 51 on the left side of section 5. After the pressure is reduced and the speed is increased by the reducer, the gas velocity will be significantly increased (the final velocity can reach 17-21 m / s). The gas continues to pass through the irregular air inlet 22 on the end plate 2 of the inlet end 11, and the gas is accelerated (the maximum speed can reach about 25 m / s). After the high-speed gas reaches the internal cavity of the valve body, it mixes with the solid material. Driven by the high-speed airflow, the mixture then passes through the outlet 23 through the other end plate 2 and enters the outlet straight pipe section 6 and the downstream conveying pipeline, forming a continuous and complete conveying process.

[0033] The bottom-blowing rotary valve designed in this invention, by setting an axial grooved flow channel 12 at the bottom of the valve body cavity and setting an air inlet 22 and a material outlet 23 at its two ends respectively, can form a continuous material conveying path at the bottom of the cavity 13. This enables continuous and stable feeding of bulk solid materials under high-pressure conveying conditions, improving the reliability and stability of operation and reducing abnormal phenomena such as leakage and jamming during material conveying. Moreover, thanks to the multiple coupling structures set in the rotary valve of this application, the problem of severe airflow turbulence and large pressure loss inside the valve body can be avoided, and there is no airflow whistling sound. At the same time, this coupling structure design can also eliminate "dead zone" areas, prevent material accumulation, and prevent material remaining in the "dead zone" area from being carried back to the valve body's inlet by the rotor blades 32, thus preventing a significant decrease in the conveying capacity of the rotary valve.

[0034] The above-described preferred embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of the invention. Any obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A bottom-blowing rotary valve, characterized in that, The bottom-blowing rotary valve includes the following structural configuration: The valve body (1) has an inlet end (11) and an outlet end (12) opposite each other in the axial direction. Its interior is set as a cavity (13), and a feed port (14) is set at the top. The bottom of the cavity (13) is also provided with an axial groove flow channel (15) that is smoothly connected to it. End plates (2) are detachably disposed on the inlet end (11) and outlet end (12) respectively to seal the cavity (13). The end plates (2) of the inlet end (11) and the outlet end (12) are respectively provided with an air inlet (22) and a discharge outlet (23) that are smoothly connected to both ends of the axial groove flow channel (15). The rotor (3) is disposed in the cavity (13), and the two ends of the rotor (3) are rotatably connected to the two end plates (2) respectively; And a drive unit (4) for driving the rotor (3) to rotate, the rotation of the rotor (3) realizing the connection between the feed port (14) at the top of the valve body (1) and the axial groove flow channel (15) at the bottom.

2. A bottom-blowing rotary valve according to claim 1, characterized in that, The valve body (1) is also provided with a connecting flange (16) on its top.

3. A bottom-blowing rotary valve according to claim 1, characterized in that, The end plate (2) is provided with a shaft hole (21), and the two ends of the rotor (3) are rotatably disposed in the shaft hole (21); the air inlet (22) and the discharge outlet (23) are disposed below the shaft hole (21).

4. A bottom-blowing rotary valve according to claim 3, characterized in that, The rotor (3) includes a rotating shaft (31) and a number of blades (32) arranged in the circumferential direction of the rotating shaft (31). The two ends of the rotating shaft (31) are respectively rotatably arranged in the shaft hole (21). The blades (32) are located in the cavity (13). An arc-shaped (33) transition connection structure is formed between the roots of adjacent blades (32).

5. A bottom-blowing rotary valve according to claim 4, characterized in that, The air inlet (22) and the discharge outlet (23) are respectively configured with irregular shapes; The air inlet (22) and the discharge outlet (23) are located on the side of the cavity (13), and their upper contours are coupled with the arc shape (33) at the root of the blade (32) so that the gap (34) between the air inlet (22) and the discharge outlet (23) and the blade (32) is smoothly transitioned. Their lower contours are smoothly transitioned with the two ends of the axial groove channel (15).

6. A bottom-blowing rotary valve according to claim 4, characterized in that, The drive unit (4) is disposed on the end plate (2) of the inlet end (11), and includes a motor (41) and a reducer (42). The motor (41) is connected to the rotating shaft (31) through the reducer (42).

7. A bottom-blowing rotary valve according to claim 1, characterized in that, The bottom-blowing rotary valve also includes an inlet reducer section (5), which is connected to the air inlet (22) for introducing compressed air into the axial groove channel (15); The inlet reducer section (5) includes a small pipe (51), a tapered pipe (52) and a first flange (53) connected in sequence. The first flange (53) is connected to the end plate (2) of the inlet end (11) and communicates with the air inlet (22).

8. A bottom-blowing rotary valve according to claim 7, characterized in that, The inlet reducer section (5) also includes a first sealing ring (54), which is disposed between the first flange (53) and the end plate (2).

9. A bottom-blowing rotary valve according to claim 1, characterized in that, The bottom-blowing rotary valve also includes an outlet straight pipe section (6), which is connected to the outlet (23) for guiding a mixture of gaseous and solid materials to a downstream storage system; The outlet straight pipe section (6) includes a straight pipe (61) and a second flange (62), the second flange (62) being connected to the end plate (2) of the outlet end (12) and communicating with the discharge port (23).

10. A bottom-blowing rotary valve according to claim 9, characterized in that, The outlet straight pipe section (6) also includes a second sealing ring (63), which is disposed between the second flange (62) and the end plate (2).

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