Pneumatic conveying pipeline air distributor

Abstract

The utility model discloses an air distributor for a pneumatic conveying pipeline, which belongs to the technical field of material conveying and comprises a pneumatic conveying pipeline input connecting unit, a pneumatic speed reduction unit, a pneumatic conveying pipeline output connecting unit and a pressure relief unit. The pneumatic speed reduction unit is connected in the pneumatic conveying pipeline in series through the pneumatic conveying pipeline input connecting unit and the pneumatic conveying pipeline output connecting unit, the pneumatic speed reduction unit is used for providing an expansion cavity, and gas-material mixed fluid in the pneumatic conveying pipeline is decelerated after flowing into the expansion cavity. The pressure relief unit is used for discharging part of gas in the pneumatic speed reduction unit to achieve pressure reduction and speed reduction adjustment of the gas-material mixed fluid. In the long-distance dilute phase conveying process, a certain amount of air can be exhausted, so that the flow speed of air-material mixed fluid is reduced, collision and friction between materials and a pipeline are reduced, pipeline abrasion is reduced, the probability that the materials are broken and wiredrawn is reduced, and the material quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of material conveying, and particularly relates to an air distribution device for a pneumatic conveying pipeline. Background Art

[0002] The existing pneumatic conveying generally includes three forms: dilute phase, intermediate phase, and dense phase. Dilute phase conveying usually adopts a lower conveying pressure, a higher air flow rate, and a lower solid-gas ratio. The material presents a suspended state in the pipeline and moves forward at a high speed. In the actual conveying process, as the conveying distance increases, the flow rate of the air-material mixed fluid will gradually increase. That is to say, the conveying air velocity continuously increases in the pipeline, resulting in the increase of the material moving speed, further leading to the strong collision and friction between the material and the pipeline, causing rapid wear of the pipeline, fragmentation and wire drawing of the material, and material degradation. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an air distribution device for a pneumatic conveying pipeline that can adjust the flow rate of the air-material mixed fluid.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0005] An air distribution device for a pneumatic conveying pipeline includes a pneumatic conveying pipeline input connection unit, a pneumatic deceleration unit, a pneumatic conveying pipeline output connection unit, and a pressure relief unit. The pneumatic deceleration unit is connected in series in the pneumatic conveying pipeline by using the pneumatic conveying pipeline input connection unit and the pneumatic conveying pipeline output connection unit. The pneumatic deceleration unit is used to provide an expanded cavity so that the air-material mixed fluid in the pneumatic conveying pipeline can flow into the expanded cavity and decelerate. The pressure relief unit is used to discharge part of the gas in the pneumatic deceleration unit to realize the decompression and deceleration adjustment of the air-material mixed fluid.

[0006] Further, the pneumatic deceleration unit is placed obliquely, and the pneumatic deceleration unit is a tubular closed structure with a large upper port and a small lower port.

[0007] Further, the pneumatic conveying pipeline input connection unit includes an air-material mixed fluid inlet pipe. One end of the air-material mixed fluid inlet pipe is communicated with the upper port of the pneumatic deceleration unit, and the other end of the air-material mixed fluid inlet pipe is connected with a flange.

[0008] Further, a closed end face is provided at the upper port of the pneumatic deceleration unit. One end of the air-material mixed fluid inlet pipe passes through the closed end face and extends into the pneumatic deceleration unit, and the air-material mixed fluid inlet pipe is closely attached to the inner wall surface of the empty body of the pneumatic deceleration unit at the lower side.

[0009] Further, the pressure relief unit includes a pressure relief pipe and a pressure relief flow regulating valve. The pressure relief pipe is communicated with a pressure relief port on the closed end surface at the upper port of the pneumatic deceleration unit, and the pressure relief port is close to the top on the closed end surface.

[0010] Further, the output connection unit of the pneumatic conveying pipeline includes a gas-solid mixture fluid outlet pipe. One end of the gas-solid mixture fluid outlet pipe is butted against the lower port of the pneumatic deceleration unit, and a flange is connected to the other end of the gas-solid mixture fluid outlet pipe.

[0011] Further, the insertion length of the gas-solid mixture fluid inlet pipe in the pneumatic deceleration unit is 1 / 6 to 1 / 2 of the length of the pneumatic deceleration unit.

[0012] Further, the diameter of the upper port of the pneumatic deceleration unit is 2 to 5 times the diameter of the pneumatic conveying pipeline.

[0013] Further, the pressure relief flow regulating valve used is an electromagnetic flow regulating valve.

[0014] Further, the pressure relief unit further includes a pressure detection unit and a pressure relief control unit. The pressure detection unit is used to detect the air pressure inside the pneumatic deceleration unit and near the output connection unit of the pneumatic conveying pipeline, and transmit the air pressure information to the pressure relief control unit. The pressure relief control unit controls the flow rate of the electromagnetic flow regulating valve in the pressure relief unit.

[0015] The beneficial effects of the present utility model are as follows:

[0016] After the present utility model is connected in series to the pneumatic conveying pipeline, in long-distance dilute-phase conveying, it can discharge a certain amount of air volume. After passing through the air distribution device of the pneumatic conveying pipeline, the flow rate of the gas-solid mixture fluid is reduced, the collision and friction between the material and the pipeline are reduced, the pipeline wear is reduced, the generation of broken and drawn materials is reduced, and the material quality is improved. Description of the Drawings

[0017] The present utility model is further described with the accompanying drawings, but the embodiments in the drawings do not constitute any limitation to the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the following drawings:

[0018] Figure 1 is an application example diagram of the present utility model connected in series in the pneumatic conveying pipeline;

[0019] Figure 2 is Figure 1 the structural schematic diagram of the present utility model shown.

[0020] In the figure: 1. Pneumatic conveying pipeline input connection unit; 2. Pneumatic deceleration unit; 3. Pneumatic conveying pipeline output connection unit; 4. Pressure relief unit; 5. Pneumatic conveying pipeline; 6. A pneumatic conveying pipeline air distributor; 11. Gas-solid mixed fluid inlet pipe; 12. Flange; 21. Lower port; 22. Closed end face; 23. Pressure relief port; 31. Gas-solid mixed fluid outlet pipe; 32. Flange plate; 41. Pressure relief pipe; 42. Pressure relief flow regulating valve; 43. Pressure detection unit; 44. Pressure relief control unit. Detailed implementation mode

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper surface", "lower surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "forward rotation", "reverse rotation", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0023] As Figure 1 , 2 shown, a pneumatic conveying pipeline air distributor 6 includes a pneumatic conveying pipeline input connection unit 1, a pneumatic deceleration unit 2, a pneumatic conveying pipeline output connection unit 3, and a pressure relief unit 4. The pneumatic deceleration unit 2 is connected in series in the pneumatic conveying pipeline 5 by using the pneumatic conveying pipeline input connection unit 1 and the pneumatic conveying pipeline output connection unit 3. The pneumatic deceleration unit 2 is used to provide an expanded cavity, so that the gas-solid mixed fluid in the pneumatic conveying pipeline 5 flows into the expanded cavity and then decelerates; the pressure relief unit 4 is used to discharge part of the gas in the pneumatic deceleration unit 2 to realize the pressure relief of the gas-solid mixed fluid. In the long-distance dilute-phase conveying of the present invention, a certain amount of air volume can be discharged. After passing through the pneumatic conveying pipeline air distribution device, the flow rate of the gas-solid mixed fluid is reduced, the collision and friction between the material and the pipeline are reduced, the pipeline wear is reduced, the crushing and wire drawing of the material are reduced, and the material quality is improved.

[0024] Specifically, the pneumatic deceleration unit 2 is placed obliquely. The pneumatic deceleration unit 2 is a tubular closed structure with a large upper port and a small lower port 21. The upper port of the pneumatic deceleration unit is provided with a closed end face 22, and a pressure relief port 23 is arranged on the closed end face 22 and close to the top of the closed end face 22. The diameter of the upper port of the pneumatic deceleration unit is 2 to 5 times the diameter of the pneumatic conveying pipeline.

[0025] The input connection unit 1 of the pneumatic conveying pipeline includes a gas-solid mixture fluid inlet pipe 11. One end of the gas-solid mixture fluid inlet pipe 11 is communicated with the upper port of the pneumatic deceleration unit, and the other end of the gas-solid mixture fluid inlet pipe 11 is connected with a flange 12. The output connection unit 3 of the pneumatic conveying pipeline includes a gas-solid mixture fluid outlet pipe 31. One end of the gas-solid mixture fluid outlet pipe 31 is butted with the lower port 21 of the pneumatic deceleration unit 2, and the other end of the gas-solid mixture fluid outlet pipe 31 is connected with a flange plate 32 and connected with the pneumatic conveying pipeline 5 through the flange plate 32.

[0026] One end of the gas-solid mixture fluid inlet pipe 11 passes through the closed end face 22 and extends into the pneumatic deceleration unit 2. The extending length of the gas-solid mixture fluid inlet pipe in the pneumatic deceleration unit is 1 / 6 to 1 / 2 of the length of the pneumatic deceleration unit.

[0027] The pressure relief unit 4 includes a pressure relief pipe 41 and a pressure relief flow regulating valve 42. The pressure relief pipe 41 is communicated with the pressure relief port 23 on the closed end face 22 at the upper port of the pneumatic deceleration unit 2.

[0028] By adjusting the pressure relief flow regulating valve 42, the flow rate of the gas-solid mixture fluid in the pneumatic conveying pipeline 5 during long-distance dilute-phase conveying is adjusted.

[0029] Another preferred implementation manner is that, on the basis of the above technical solution, the pressure relief flow regulating valve 42 adopts an electromagnetic flow regulating valve. The pressure relief unit 4 further includes a pressure detection unit 43 and a pressure relief control unit 44. The pressure detection unit 43 is used to detect the air pressure inside the pneumatic deceleration unit 2 and close to the output connection unit 3 of the pneumatic conveying pipeline, and transmit the air pressure information to the pressure relief control unit 44. The pressure relief control unit 44 performs flow control on the electromagnetic flow regulating valve 42 in the pressure relief unit to adjust the output air pressure of the pressure reduction and deceleration unit 2. After adding the pressure detection unit 43 and the pressure relief control unit 44, the pressure relief unit 4 realizes precise automatic adjustment of the flow rate of the gas-solid mixture fluid in the pneumatic conveying pipeline 5 through closed-loop control.

[0030] It should be further noted that according to the actual working requirements and the length of the pneumatic conveying pipeline 5, several pneumatic conveying pipeline air distributors of the present invention can be connected in series on the pneumatic conveying pipeline 5.

[0031] Working principle: The high-speed material in the pneumatic conveying pipeline 5, accompanied by high-speed gas, enters the pneumatic deceleration unit 2 through the gas-solid mixture fluid inlet pipe 11. Under the action of inertia, the material continues to move forward at high speed along the cavity of the pneumatic deceleration unit 2 and enters the pneumatic conveying pipeline 5 again through the gas-solid mixture fluid outlet pipe 31. After the high-speed gas enters the pneumatic deceleration unit 2, it begins to expand and decelerate. Part of it is discharged through the pressure relief pipe 41 in the pressure relief unit 4, and part of it continues to enter the pneumatic conveying pipeline 5 again through the gas-solid mixture fluid outlet pipe 31. The gas velocity discharged from the gas-solid mixture fluid outlet pipe 31 is less than the gas velocity in the previous pneumatic conveying pipeline 5, so as to achieve the purpose of pressure reduction and speed reduction, thereby reducing the material movement speed and reducing the collision and friction between the material and the pipeline. According to actual needs and dilute-phase conveying conditions, the pressure relief flow regulating valve 42 is adjusted to control the exhaust volume.

[0032] The gas-solid mixture fluid inlet pipe 11 is closely attached to the inner wall surface of the lower side of the cavity of the pneumatic deceleration unit 2 and extends a set distance. In particular, the insertion length of the gas-solid mixture fluid inlet pipe in the pneumatic deceleration unit is 1 / 6 to 1 / 2 of the length of the pneumatic deceleration unit. When the conveying gas changes its traveling direction in the cavity of the pressure reduction and deceleration unit 2 and is discharged through the pressure relief pipe 41, it can ensure that the material will not change its moving trajectory under the action of high-speed inertia and can be smoothly discharged from the lower port.

[0033] In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pneumatic conveying pipeline air distributor, characterized in that: It includes a pneumatic conveying pipeline input connection unit, a pneumatic deceleration unit, a pneumatic conveying pipeline output connection unit, and a pressure relief unit. The pneumatic deceleration unit is connected in series in the pneumatic conveying pipeline by using the pneumatic conveying pipeline input connection unit and the pneumatic conveying pipeline output connection unit. The pneumatic deceleration unit is used to provide an expanded cavity so that the gas-solid mixture fluid in the pneumatic conveying pipeline can be decelerated after flowing into the expanded cavity. The pressure relief unit is used to discharge part of the gas in the pneumatic deceleration unit to realize the pressure reduction and deceleration adjustment of the gas-solid mixture fluid.

2. The pneumatic conveying pipeline air distributor according to claim 1, characterized in that: The pneumatic deceleration unit is placed obliquely and is a tubular closed structure with a large upper port and a small lower port.

3. The pneumatic conveying pipeline air distributor according to claim 2, wherein: The pneumatic conveying pipeline input connection unit includes a gas-solid mixture fluid inlet pipe. One end of the gas-solid mixture fluid inlet pipe is communicated with the upper port of the pneumatic deceleration unit, and the other end of the gas-solid mixture fluid inlet pipe is connected with a flange.

4. The air distribution device for pneumatic conveying pipeline according to claim 3, wherein: A closed end face is provided at the upper port of the pneumatic deceleration unit. One end of the gas-solid mixture fluid inlet pipe passes through the closed end face and extends into the pneumatic deceleration unit, and the gas-solid mixture fluid inlet pipe is closely attached to the inner wall surface of the empty body of the pneumatic deceleration unit at the lower side.

5. The air distribution device for pneumatic conveying pipeline according to claim 4, wherein: The pressure relief unit includes a pressure relief pipe and a pressure relief flow regulating valve. The pressure relief pipe is communicated with a pressure relief port on the closed end face at the upper port of the pneumatic deceleration unit, and the pressure relief port is close to the top of the closed end face.

6. The pneumatic conveying pipeline air distributor according to claim 2, wherein: The pneumatic conveying pipeline output connection unit includes a gas-solid mixture fluid outlet pipe. One end of the gas-solid mixture fluid outlet pipe is butted with the lower port of the pneumatic deceleration unit, and the other end of the gas-solid mixture fluid outlet pipe is connected with a flange plate.

7. The pneumatic conveying pipeline air distributor according to claim 4, wherein: The insertion length of the gas-solid mixture fluid inlet pipe in the pneumatic deceleration unit is 1 / 6 to 1 / 2 of the length of the pneumatic deceleration unit.

8. The pneumatic conveying pipeline air distributor according to claim 2, characterized in that: The diameter of the upper port of the pneumatic deceleration unit is 2 to 5 times the diameter of the pneumatic conveying pipeline.

9. The air distribution device for pneumatic conveying pipeline according to claim 5, characterized in that: The pressure relief flow regulating valve used is an electromagnetic flow regulating valve.

10. The air distribution device for pneumatic conveying pipeline according to claim 9, characterized in that: The pressure relief unit further includes a pressure detection unit and a pressure relief control unit. The pressure detection unit is used to detect the air pressure inside the pneumatic deceleration unit and near the pneumatic conveying pipeline output connection unit, and transmit the air pressure information to the pressure relief control unit. The pressure relief control unit controls the flow of the electromagnetic flow regulating valve in the pressure relief unit.

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