Powder conveying device

Abstract

The embodiment of the utility model provides a powder conveying device, and relates to the technical field of powder conveying. The powder conveying device comprises a powder conveying pipe, the powder conveying pipe comprises a body and an air pipe, the body is provided with a pipe cavity used for powder circulation, and the air pipe is provided with a first pipe section allowing air circulation. The first pipe section is arranged in the pipe cavity and provided with a vent hole communicated with the pipe cavity, the hole diameter of the vent hole is smaller than the material diameter of the powder, and the air pipe is used for being connected with an external air source. After an external gas source is connected with the gas pipe and gas is introduced into the gas pipe by the gas source, the gas can enter the pipe cavity through the vent holes after flowing into the gas pipe, and the gas can drive the powder, so that the powder is fluidized, and the situation that the powder is accumulated in the pipe cavity is reduced; and therefore, the situation that the powder conveying device needs to be shut down for maintenance due to pipeline blockage can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to powder transportation technical field, specifically, relate to a powder conveying device. BACKGROUND

[0002] Pneumatic conveying is one of the important and widely used ways of powder and particle conveying. Pneumatic conveying is a technology that uses gas flow with certain pressure and speed to convey powder and particle bulk materials, also known as air conveying. Pneumatic conveying has the advantages of small floor area, flexible layout, stable operation, strong sealing, no powder pollution, high automation level in conveying process, etc., and is widely used in process engineering. It is usually divided into dilute phase pneumatic conveying and dense phase pneumatic conveying according to the material-gas ratio, Froude number, system gas velocity, etc.

[0003] The inventor found that during the pneumatic conveying of powder, the gas drives the solid particles to flow and move, and the powder is conveyed from the production point to the product storage point. In the conveying process, when encountering a flow change (pipe elbow) or long-distance conveying, the resistance increases, and local solid-phase accumulation may occur. With the accumulation of time, blockage may easily occur in the pipeline of the conveying system. Once blockage occurs, the conveying system needs to be shut down for maintenance, which may cause production loss. SUMMARY

[0004] The purpose of the utility model includes providing a powder conveying device, which can reduce the blockage of the pipeline in the conveying system, thereby reducing the need for system shutdown and maintenance due to pipeline blockage.

[0005] The embodiments of the utility model can be implemented as follows:

[0006] In a first aspect, the utility model provides a powder conveying device, which includes a powder conveying pipe. The powder conveying pipe includes a body and a gas pipe. The body has a pipe cavity for powder flow. The gas pipe has a first pipe section for gas flow. The first pipe section is arranged in the pipe cavity and is provided with a vent hole communicating with the pipe cavity. The vent hole has a hole diameter smaller than the material diameter of the powder. The gas pipe is connected to an external gas source.

[0007] The embodiments of the utility model provide a powder conveying device, which includes a powder conveying pipe. The powder conveying pipe includes a body and a gas pipe. The body has a pipe cavity for powder flow. The gas pipe has a first pipe section for gas flow. The first pipe section is arranged in the pipe cavity and is provided with a vent hole communicating with the pipe cavity. The vent hole has a hole diameter smaller than the material diameter of the powder. The gas pipe is connected to an external gas source. When the external gas source is connected to the gas pipe and the gas source supplies gas to the gas pipe, the gas flows into the gas pipe and enters the pipe cavity through the vent hole. The gas can drive the powder, making the powder flow and reducing the accumulation of powder in the pipe cavity. Thus, the powder conveying device can be prevented from being shut down and maintained due to pipeline blockage. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the structure of the powder conveying device provided in an embodiment of the present utility model;

[0010] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0011] Icons: 1-Powder conveying device; 100-Powder conveying pipe; 101-Inlet; 102-Outlet; 110-Support; 120-Body; 121-Cavity; 200-Air pipe; 210-First pipe section; 220-Second pipe section; 230-Third pipe section; 240-Valve; 300-Bend; 2-Powder. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0013] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0014] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0015] In the description of the utility model, it needs to explain, if the terms "upper", "lower", "inner", "outer" and so on indicate the orientation or position relationship is based on the orientation or position relationship shown in the drawing, or is the orientation or position relationship of the utility model product when using, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element must have a particular orientation, construct and operate, therefore, it cannot be understood as the limitation of the utility model.

[0016] In addition, if the terms "first", "second" and so on are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

[0017] It needs to explain that the features in the embodiments of the utility model can be combined with each other without conflict.

[0018] The specific structure of the powder conveying device provided by the utility model embodiment and the corresponding technical effects brought by it will be described in detail below with reference to the patent drawings.

[0019] Please refer to Figure 1 The powder conveying device 1 provided by the utility model embodiment comprises a powder conveying pipe 100, the powder conveying pipe 100 comprises a body 120 and an air pipe 200, the body 120 has a pipe cavity 121 for powder flow, the air pipe 200 has a first pipe section 210 allowing gas flow, the first pipe section 210 is arranged in the pipe cavity 121 and is provided with a gas passage hole communicating with the pipe cavity 121, the hole diameter of the gas passage hole is smaller than the material diameter of the powder 2, and the air pipe 200 is used for being connected with an external gas source, so that in the process of transporting the powder 2, the powder 2 cannot enter the air pipe 200 through the gas passage hole and cannot cause the loss of the powder 2. The air pipe 200 is used for being connected with an external gas source.

[0020] It needs to explain that the powder conveying pipe 100 in the embodiment is applied to the powder conveying device 1, and the powder conveying device 1 is used for transporting the powder 2 by gas force, and when the powder 2 is transported in the pipe cavity 121 of the body 120 for a long distance or meets an upward turning elbow in the conveying process, the transportation resistance of the powder 2 will increase, so that the powder 2 is prone to be accumulated in the long-distance powder conveying pipe 100 or is accumulated at the upward turning elbow, and the powder 2 is prone to be blocked in the powder conveying pipe 100.

[0021] After the external gas source air pipe 200 is connected and the gas source inputs gas into the air pipe 200, the gas can enter the powder conveying pipe 100 through the gas passage hole after flowing into the air pipe 200, the gas can drive the powder 2, the powder 2 is in a flow state, the powder conveying pipe 100 can reduce the accumulation of the powder 2, and the system can reduce the situation of needing to stop and overhaul due to pipe blockage.

[0022] The first pipe section 210 is formed as a filter pipe with a plurality of air holes in the outer peripheral wall. It can be understood that, due to the plurality of air holes in the first pipe section 210, the amount of gas flowing into the powder conveying pipe 100 from the gas pipe 200 can be increased, further preventing the powder 2 from accumulating in the powder conveying pipe 100.

[0023] It should be noted that, in order to avoid the gas from the gas source affecting the quality of the powder 2, the gas source is an inert gas source, that is, the gas flowing into the gas pipe 200 from the gas source is inert gas. Of course, the gas can also be other gases that do not affect the quality of the powder 2, and is not limited to inert gas.

[0024] In detail, in the present embodiment, the first pipe section 210 is a filter pipe sintered from metal powder. It can be understood that, after the first pipe section 210 is sintered from metal powder, pores are uniformly distributed on the pipe wall, which are air holes that can uniformly release gas into the powder conveying pipe 100.

[0025] Of course, in some other embodiments, the first pipe section 210 is not limited to being sintered from metal powder. In the present embodiment, the number of air holes on the first pipe section 210 is a plurality and the plurality of air holes are uniformly arranged on the first pipe section 210.

[0026] It should be noted that, in the present embodiment, uniform should not be understood as strictly uniform, but only needs to be substantially uniform.

[0027] The first pipe section 210 is arranged on the inner side wall of the bottom of the body 120 and extends in a direction parallel to the extension direction of the body 120. It can be understood that the powder 2 is generally deposited at the bottom of the body 120, and the first pipe section 210 is arranged on the side wall of the bottom of the body, so that the gas can flow at the bottom and form a gas flow layer, thereby facilitating the flow of the deposited powder and preventing accumulation. Since the extension direction of the first pipe section 210 is parallel to the extension direction of the powder conveying pipe 100, the gas can be uniformly released into the powder conveying pipe 100 relatively uniformly, avoiding the disturbance of the gas flow in the powder conveying pipe 100 in the powder conveying system.

[0028] It should be noted that, in the present embodiment, parallel should not be understood as strictly parallel, but only needs to be substantially parallel. The bottom of the body 120 mentioned above can be understood as the relatively lower part of the body 120 when the body 120 is upright.

[0029] The air pipe 200 in the embodiment further comprises a second pipe section 220, one end of the second pipe section 220 is connected with the first pipe section 210, the other end of the second pipe section 220 extends out of the body 120 to be connected with an external gas source, the second pipe section 220 is provided with a valve 240, and the valve 240 is located outside the body 120.

[0030] Optionally, the valve 240 is an adjusting valve, and the adjusting valve can adjust the opening degree of a valve body thereof, that is, an operator can adjust the gas flow rate during ventilation through the valve 240.

[0031] Of course, in some other embodiments, the valve 240 can also be other types of valves 240, and the type of the valve 240 is not specifically limited herein.

[0032] The body 120 has an inlet 101 and an outlet 102 in communication with the pipe cavity 121, and in the embodiment, one end of the first pipe section 210 close to the second pipe section 220 is close to the inlet 101, and the other end of the first pipe section 210 away from the second pipe section 220 is close to the outlet 102, that is, the extension direction of the first pipe section 210 is not perpendicular to the extension direction of the main pipe, and therefore, the first pipe section 210 can be accommodated in the powder conveying pipe 100 for a longer time, so that the amount of gas blown out from the first pipe section 210 into the powder conveying pipe 100 can be increased, so as to reduce the probability of accumulation of the powder 2 in the powder conveying pipe 100. Further, the powder 2 is conveyed from the inlet 101 to the outlet 102, the second pipe section 220 is connected with the gas source and is adjacent to the outlet 102, and the gas in the first pipe section 210 flows from the one end of the second pipe section 220 to the other end away from the second pipe section 220, that is, the gas flows in the first pipe section 210 in the same direction as the conveying direction of the powder 2, which is also beneficial to promote the flow of the powder 2 and prevent the powder 2 from being accumulated and disordered.

[0033] In the embodiment, the gas flow direction in the air pipe 200 is parallel to the gas flow direction in the pipe cavity 121 of the body 120, which is helpful to the conveying of the material in the pipe cavity 121 of the body 120.

[0034] Optionally, the air pipe 200 further comprises a third pipe section 230, and the third pipe section 230 is arranged at the one end of the first pipe section 210 away from the second pipe section 220, and the other end of the third pipe section 230 away from the second pipe section 220 is a blocking end, and the blocking end is located outside the body 120.

[0035] Since the blocking end in the embodiment is located outside the powder conveying pipe 100, an operator can conveniently detect whether the blocking end leaks, so as to avoid a large amount of gas from the second pipe section 220 flowing out of the blocking end.

[0036] Optionally, the extending direction of the third pipe section 230 is perpendicular to the extending direction of the powder conveying pipe 100, thus the hole on the body 120 for the third pipe section 230 to pass through can be roughly adapted to the shape of the outer peripheral wall of the third pipe section, after the third pipe section 230 is installed, the gap between the third pipe section 230 and the body 120 can be reduced, which is convenient for the operator to seal and connect the third pipe section 230 and the body 120, improves the sealing between the body 120 and the third pipe section 230, and it can be understood that in order to ensure the sealing between the powder conveying pipe 100 and the third pipe section 230, the powder conveying pipe 100 and the third pipe section 230 can be sealingly welded or provided with a sealing member for sealing connection.

[0037] In detail, in the embodiment, the powder conveying pipe 100 is welded with the first pipe section 210, since the powder conveying pipe 100 is welded with the first pipe section 210, the first pipe section 210 can be stably arranged in the powder conveying pipe 100, and the gas discharged from the vent hole of the first pipe section 210 can be stably discharged.

[0038] Please refer to Figure 2 In detail, in the embodiment, a plurality of support portions 110 are arranged in the powder conveying pipe 100, the support portions 110 are arranged at intervals along the extending direction of the first pipe section 210, and the support portions 110 are welded with the outer wall of the first pipe section 210. Due to the arrangement of the first support portion 110, a gap is formed between the outer wall of the first pipe section 210 and the inner wall of the powder conveying pipe 100, so as to reduce the situation that the vent hole of the first pipe section 210 is blocked by the powder conveying pipe 100.

[0039] Optionally, the powder conveying device 1 in the embodiment further comprises an elbow pipe 300, the elbow pipe 300 is connected with the body 120, and one of the two ends of the first pipe section 210 is close to the connection between the body 120 and the elbow pipe 300, thus through the arrangement of the air pipe 200, the problem of powder accumulation at the connection between the elbow pipe 300 and the body 120 can be effectively solved.

[0040] In some embodiments, the powder conveying device 1 can comprise a plurality of pipe sections, wherein the powder conveying pipe 100 can be arranged at the far end of the powder 2 conveying, and the powder 2 can be deposited in the volume at the far end after being conveyed for a long time, so as to reduce the problem of blockage of the powder conveying device; or the powder conveying device 1 can comprise a plurality of powder conveying pipes 100, and the plurality of powder conveying pipes 100 can be arranged at intervals between the plurality of pipe sections, so that the gas can be introduced at multiple places in the whole conveying process of the powder conveying device 1 to prevent the powder 2 from accumulating, and further prevent the blockage.

[0041] Optionally, the second pipe section 220 is in communication with the powder conveying pipe 100 through the vent hole on the first pipe section 210, that is, in this embodiment, the second pipe section 220 is not provided with a vent hole, and since the end of the second pipe section 220 away from the first pipe section 210 is used to be connected with the gas source, the gas from the external gas source can be prevented from overflowing from the vent hole on the second pipe section 220, thereby affecting the flow rate.

[0042] It should be noted that in this embodiment, the first pipe section 210 and the second pipe section 220 can be detachably connected or non-detachably connected. When the first pipe section 210 and the second pipe section 220 are detachably connected, it is convenient for the operator to disassemble and assemble, and it is also convenient for the operator to install the air pipe 200 into the powder conveying pipe 100. The detachable connection mode can be that a connecting flange is arranged at the end of the first pipe section 210 close to the second pipe section 220, and a connecting flange can also be arranged at the end of the second pipe section 220 close to the first pipe section 210, and the first pipe section 210 and the second pipe section 220 can be detachably connected through the connecting flanges and threaded fasteners.

[0043] Of course, in some optional embodiments, the first pipe section 210 and the second pipe section 220 can also be welded to ensure the connection strength of the first pipe section 210 and the second pipe section 220.

[0044] In this embodiment, the second pipe section 220 is at an angle to the first pipe section 210, and the extension direction of the second pipe section 220 is parallel to the radial direction of the powder conveying pipe 100, that is, the extension direction of the second pipe section 220 is perpendicular to the extension direction of the powder conveying pipe 100. It can be understood that the second pipe section 220 is arranged to extend out of the powder conveying pipe 100 from the side wall of the powder conveying pipe 100.

[0045] The extension direction of the second pipe section 220 is perpendicular to the extension direction of the powder conveying pipe 100, which can ensure that the hole for the second pipe section 220 to pass through on the side wall of the powder conveying pipe 100 can be adapted to the outer periphery of the second pipe section 220. After the second pipe section 220 is passed through, the gap between the second pipe section 220 and the body 120 can be reduced, which facilitates the operator to seal and connect the second pipe section 220 and the body 120, thereby improving the sealing between the powder conveying pipe 100 and the second pipe section 220. It can be understood that in order to ensure the sealing between the powder conveying pipe 100 and the second pipe section 220, the powder conveying pipe 100 and the second pipe section 220 can be sealingly welded.

[0046] It should be noted that the perpendicularity in this embodiment should not be limited to the strict sense of perpendicularity, but only to the approximate perpendicularity.

[0047] Optionally, in some embodiments, the number of air tubes 200 is multiple and arranged at intervals around the circumference of the powder conveying pipe 100, so as to increase the amount of gas flowing into the powder conveying pipe 100 from the air tubes 200, and further prevent the accumulation of powder 2 in the powder conveying pipe 100.

[0048] It should be noted that the first pipe segment 210 in the embodiment can be located at the elbow 300 of the powder conveying pipe 100 or arranged at a position away from the inlet 101 of the powder conveying pipe 100, so as to improve the flowability of the powder 2 in the powder conveying pipe 100 through the air holes on the first pipe segment 210, and prevent the accumulation of powder 2 from occurring at the elbow 300 or the position away from the inlet 101 of the powder conveying pipe 100.

[0049] In summary, the powder conveying device 1 provided by the embodiment of the present application comprises a powder conveying pipe 100, and the powder conveying pipe 100 comprises a body 120 and an air tube 200. The body 120 has a pipe cavity 121 for powder flow. The air tube 200 has a first pipe segment 210 allowing gas flow. The first pipe segment 210 is arranged in the pipe cavity 121 and provided with air holes communicating with the pipe cavity 121. The hole diameter of the air holes is smaller than the material diameter of the powder 2. The air tube 200 is used to be connected with an external gas source. After the external gas source is connected with the air tube 200 and the gas source flows gas into the air tube 200, the gas can flow into the pipe cavity 121 through the air holes after flowing into the air tube 200. The gas can drive the powder 2 to be fluidized, so as to reduce the accumulation of powder 2 in the pipe cavity 121, and further reduce the situation that the system needs to be shut down for maintenance due to pipeline blockage.

[0050] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A powder conveying device, characterized in that, include: A powder conveying pipe (100) includes a body (120) and an air pipe (200). The body (120) has a cavity (121) for powder flow. The air pipe (200) has a first pipe section (210) that allows gas flow. The first pipe section (210) is located in the cavity (121) and has a vent hole communicating with the cavity (121). The diameter of the vent hole is smaller than the diameter of the powder (2). The air pipe (200) is used to connect to an external gas source.

2. The powder conveying device according to claim 1, characterized in that: The first pipe segment (210) is formed as a filter pipe with a plurality of the vent holes on its outer peripheral wall.

3. The powder conveying device according to claim 2, characterized in that: The first pipe section (210) is a filter pipe sintered from metal powder.

4. The powder conveying device according to claim 1, characterized in that: The first pipe segment (210) is located on the bottom inner wall of the body (120) and its extension direction is parallel to the extension direction of the body (120).

5. The powder conveying device according to claim 1, characterized in that: The air pipe (200) further includes a second pipe section (220), one end of which is connected to the first pipe section (210), and the other end of which extends out of the body to be connected to a gas source. The second pipe section (220) is provided with a valve (240), which is located outside the body (120).

6. The powder conveying device according to claim 5, characterized in that: It also includes a third pipe section (230), which is located at the end of the first pipe section (210) away from the second pipe section (220). One end of the third pipe section (230) is connected to the first pipe section (210), and the other end of the third pipe section (230) is a sealing end located on the outside of the body.

7. The powder conveying device according to claim 5, characterized in that: The body has an inlet (101) and an outlet (102) that communicate with the lumen. The end of the first pipe segment (210) near the second pipe segment (220) is close to the inlet (101), and the end of the first pipe segment (210) away from the second pipe segment (220) is close to the outlet (102).

8. The powder conveying device according to claim 1, characterized in that: It also includes a bend (300), the body (120) is connected to the bend (300), and one end of the first pipe segment (210) is close to the connection between the body (120) and the bend (300).

9. The powder conveying device according to claim 1, characterized in that: It also includes a support portion (110), which is connected to the body (120) and the first pipe segment (210) respectively. There are multiple support portions (110) and they are spaced apart along the extension direction of the first pipe segment (210).

10. The powder conveying device according to claim 1, characterized in that: The number of air pipes (200) is multiple and they are arranged circumferentially around the powder conveying pipe (100).

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