Rotary valve group for dense-phase granular material conveying

Abstract

The utility model provides a kind of dense phase granular material conveying rotary valve group, comprising: primary rotary valve and secondary rotary valve, the primary rotary valve and secondary rotary valve are connected with its matched motor speed reducer, chain and sprocket respectively;The outlet of the primary rotary valve is connected with the inlet of the secondary rotary valve by soft connection. Wherein, the soft connection is equipped with flow guide cylinder. The dense phase granular material conveying rotary valve group provided in the embodiment can effectively avoid the breakage of granular material during conveying, has good air locking effect, is a kind of granular material dense phase conveying technology, and is suitable for PVC, PE, PP, carbon black and other KELI granular material conveying.

Description

Technical Field

[0001] This utility model relates to the field of material conveying technology, and in particular to a rotary valve assembly for conveying dense phase particulate materials. Background Technology

[0002] A typical dense phase conveying system usually includes a gas source, a feeding device, a conveying pipeline, a separation device, and a control system. Ensuring the original particle size during the conveying process is the key to quality control in many industries, and this is highly valued both domestically and internationally. As the source of the conveying process, the feeding device sometimes needs to use a rotary valve for feeding. However, rotary valves are prone to shearing and squeezing during the feeding process, which can lead to material breakage. Utility Model Content

[0003] In view of the above, this utility model provides a rotary valve assembly for conveying dense phase particulate materials, including: a primary rotary valve and a secondary rotary valve, wherein the primary rotary valve and the secondary rotary valve are respectively connected to their matching motor reducer, chain and sprocket;

[0004] The outlet of the primary rotary valve is connected to the inlet of the secondary rotary valve via a flexible connection.

[0005] In some embodiments, the flexible connection includes a flow guide tube, which has a larger diameter at one end and a smaller diameter at the other end.

[0006] In some embodiments, the primary rotary valve includes a first rotor and a first valve body, wherein the first rotor is located within the first valve body.

[0007] In some embodiments, the gap between the first rotor and the first valve body is 6-12 mm.

[0008] In some embodiments, the secondary rotary valve includes a second rotor and a second valve body, wherein the second rotor is located within the second valve body.

[0009] In some embodiments, the gap between the second rotor and the second valve body is 0.1-0.2 μm.

[0010] In some embodiments, the first rotor and the second rotor are respectively connected to a motor reducer, a chain and a sprocket; the outlet of the first valve body and the inlet of the second valve body are connected by a flexible connection.

[0011] In some embodiments, the first rotor blades have no chamfers and the edges are rounded.

[0012] In some embodiments, the second rotor blade has a 45-60° chamfer.

[0013] In some embodiments, the chamfer of the second rotor blade is opposite to the direction of rotation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the rotary valve assembly for conveying dense-phase particulate materials according to an embodiment of the present invention. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the structure of the rotary valve assembly for conveying dense-phase particulate materials according to an embodiment of the present invention. Figure 2 ;

[0016] In the attached figures, the following labels are used:

[0017] 1-Motor reducer;

[0018] 2-Chain;

[0019] 3-Sprocket;

[0020] 4-Protective cover;

[0021] 5-Soft connection;

[0022] 6-Sealing gasket;

[0023] 7-Gasket;

[0024] 8- Bolts;

[0025] 9-Nut;

[0026] 10-Guide tube;

[0027] 11-First rotor;

[0028] 12-First valve body;

[0029] 13-Second rotor;

[0030] 14-Second valve body. Detailed Implementation

[0031] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of this utility model, but it is not intended to limit the scope of protection of the appended claims of this utility model.

[0032] The specification and subsequent claims use certain terms to refer to specific components or parts. Those skilled in the art will understand that users or manufacturers may use different names or terms to refer to the same component or part. This specification and subsequent claims do not distinguish components or parts by differences in name, but rather by differences in function. The terms "comprising" and "including" used throughout the specification and subsequent claims are open-ended and should be interpreted as "including but not limited to". Furthermore, the term "connection" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connections made through other means.

[0033] It should be noted that in the description of this utility model, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", as well as "about", "approximately", "substantially", "left and right", etc., indicating the orientation or positional relationship or parameters, are all based on the orientation or positional relationship shown in the accompanying 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, a specific size, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] See Figure 1-2 This utility model provides a rotary valve assembly for conveying dense-phase particulate materials, including a primary rotary valve and a secondary rotary valve. The primary and secondary rotary valves are respectively connected to their respective motor reducers 1, chains 2, and sprockets 3. A protective cover 4 is also provided on the outer side of the sprocket 3. The outlet of the primary rotary valve and the inlet of the secondary rotary valve are connected via a flexible connection 5, a sealing gasket 6, a gasket 7, a bolt 8, and a nut 9. The flexible connection 5 contains a guide tube 10, with one end larger than the other. In this embodiment, the guide tube 10 is round at the top and square at the bottom, with the lower opening size ≤ the spacing of the rotor cavities. When rotating to the outlet, the material in the cavities will not be squeezed by the material above, and will not be compressed in a confined space, leading to breakage. The flexible connection guide tube connecting the primary and secondary rotary valves effectively controls the flow rate of particulate material entering the secondary rotary valve, ensuring it remains below the theoretical maximum discharge capacity of the rotary valve, achieving starvation feeding.

[0035] In this embodiment, the first-stage rotary valve includes a first rotor 11 and a first valve body 12, wherein the first rotor 11 is located inside the first valve body 12; the gap between the first rotor 11 and the first valve body 12 is 6-12 mm; the second-stage rotary valve includes a second rotor 13 and a second valve body 14, wherein the second rotor 13 is located inside the second valve body 14; the gap between the second rotor 13 and the second valve body 14 is 0.1-0.2 μm.

[0036] Specifically, the first rotor 11 and the second rotor 13 are respectively connected to the motor reducer 1, the chain 2 and the sprocket 3; the outlet of the first valve body 12 is connected to the inlet of the second valve body 14 through a flexible connection 5.

[0037] In this embodiment, the blades of the first rotor 11 have no chamfer and the edges are rounded; the blades of the second rotor 13 have a chamfer of 45-60°; the chamfer of the blades of the second rotor 13 is opposite to the direction of rotation.

[0038] This embodiment addresses the issue of easy breakage during rotary valve feeding in granular material conveying. It adopts a two-stage rotary valve + flexible connection method. The granular material first enters the first valve body of the first-stage rotary valve, and the first rotor is driven to rotate by a motor reducer. The granular material enters the guide tube in the flexible connection, and the guide tube guides the material into the second valve body of the second-stage rotary valve. The material is then output through the second rotor. The blades of the second rotor have a 45-60° chamfer, and the rotation direction is opposite to the chamfer.

[0039] In summary, the rotary valve assembly for conveying dense-phase particulate materials provided in this embodiment is suitable for conveying products with strict requirements on the original particle size. It includes a first valve body and a first rotor; a second valve body and a second rotor; and a flexible connection connecting the first and second rotary valves. The flexible connection contains a guide tube, which enables the second rotary valve to perform a starvation feeding function. In this embodiment, the first-stage rotary valve uses an open rotor, which isolates the material in the hopper from the material in the rotor cavity, and also avoids the rotor and cavity from compressing the particulate material, thus preventing breakage. The second-stage rotary valve uses a closed rotor, and the chamfered design on the rotor prevents material compression and also acts as an airlock. The rotary valve assembly for conveying dense-phase particulate materials provided in this embodiment effectively prevents particle breakage during conveying and has a good airlock effect.

[0040] In this embodiment, the primary discharge valve in the rotary valve assembly for conveying dense-phase particulate materials controls the discharge speed and isolates the material from gravity within the hopper. Due to a 6-12mm gap between the primary and secondary rotary valve chambers, the material can overflow from the side gaps of the rotor blades, avoiding forced compression and shearing. When the grid chamber rotates to the outlet, the material can be smoothly discharged from the side and bottom, greatly reducing compression and breakage. The flexible connecting guide tube connecting the primary and secondary rotary valves directly guides the material to the middle part of the rotor chamber. When rotating to the outlet, the material in the grid chamber is not squeezed by the material above, and is not compressed in a confined space, preventing breakage. The flexible connecting guide tube also controls the secondary rotary valve to discharge below its theoretical maximum capacity, achieving starvation feeding. The secondary rotary valve isolates the system pressure. The rotor blades of the secondary rotary valve have a 45-60° chamfer, opposite to the direction of rotation, preventing the material from being squeezed by the rotor rotation and avoiding particle breakage.

[0041] The rotary valve assembly for conveying dense-phase particulate materials provided in this embodiment is a dense-phase particulate material conveying technology. It is designed for materials with high requirements for particle quality and product quality, and can be applied to the conveying of materials such as PVC, PE, PP, and carbon black.

[0042] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A rotary valve assembly for conveying dense phase particulate materials, characterized in that: include: A primary rotary valve and a secondary rotary valve, wherein the primary rotary valve and the secondary rotary valve are respectively connected to their respective motor reducers, chains and sprockets; The outlet of the primary rotary valve is connected to the inlet of the secondary rotary valve via a flexible connection.

2. The rotary valve assembly for conveying dense-phase particulate materials according to claim 1, characterized in that: The flexible connector is equipped with a flow guide tube, which has a larger diameter at one end and a smaller diameter at the other end.

3. The rotary valve assembly for conveying dense-phase particulate materials according to claim 1, characterized in that: The primary rotary valve includes a first rotor and a first valve body, wherein the first rotor is located within the first valve body.

4. The rotary valve assembly for conveying dense-phase particulate materials according to claim 3, characterized in that: The gap between the first rotor and the first valve body is 6-12mm.

5. The rotary valve assembly for conveying dense phase particulate materials according to claim 3, characterized in that: The secondary rotary valve includes a second rotor and a second valve body, wherein the second rotor is located within the second valve body.

6. The rotary valve assembly for conveying dense-phase particulate materials according to claim 5, characterized in that: The gap between the second rotor and the second valve body is 0.1-0.2 μm.

7. The rotary valve assembly for conveying dense-phase particulate materials according to claim 5, characterized in that: The first rotor and the second rotor are respectively connected to the motor reducer, the chain and the sprocket; the outlet of the first valve body and the inlet of the second valve body are connected by a flexible connection.

8. The rotary valve assembly for conveying dense-phase particulate materials according to claim 5, characterized in that: The first rotor blade has no chamfer, and the edges are rounded.

9. The rotary valve assembly for conveying dense-phase particulate materials according to claim 5, characterized in that: The second rotor blade has a chamfer of 45-60°.

10. The rotary valve assembly for conveying dense-phase particulate materials according to claim 9, characterized in that: The chamfer of the second rotor blade is opposite to the direction of rotation.

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