Flat-bottom powder bin discharging device

Abstract

The utility model discloses a flat-bottom powder bin discharging device, which belongs to the technical field of powder bin discharging and is arranged on a bottom plate of a powder bin chamber. The device is characterized by comprising a hollow pressure reducing cone, the bottom of the pressure reducing cone is fixed to a bottom plate of a powder bin chamber through a connecting column, a necking structure and a flaring structure are combined to form a Venturi structure, and a preset number of rotational flow air pipes are connected to the side wall of the pressure reducing cone in an annular matrix mode; and the preset number of cyclone air pipes are communicated with the high-pressure air inlet pipe. The utility model has the beneficial effects that the feeding runner is enclosed between the bottom of the decompression cone and the bin chamber of the powder bin, so that materials can conveniently enter the decompression cone; the necking structure and the flaring structure are combined to form a venturi structure, and materials are driven into the air outlet pipe of the flaring structure to a greater extent and discharged according to the venturi principle; and the effect of turbulent flow of powder in the pressure reducing cone is achieved through the rotational flow effect, and the situation that materials block a pipe opening of the air outlet pipe is avoided.

Description

Technical field:

[0001] The utility model belongs to the technical field of powder bin discharging, and more specifically relates to a flat-bottom powder bin discharging device. Background technology:

[0002] The batching bin is composed of two parts, the upper part is a vertical cube or cylinder, which is used to store powder, and the lower part is a truncated pyramid or truncated cone, which is the discharge channel of the powder. The taper of the cone is directly related to the smoothness of the discharge.

[0003] The lower section of the existing batching bin is of cone design and is directly connected to the bin box. The material is weighed and batched by rotating the collecting bin inside the bin box. In special cases, the existing vertical space is limited and the cone batching bin cannot be installed.

[0004] Therefore, compared with the cone design of the lower section, the powder discharge of the flat-bottomed powder silo has the following technical bottlenecks: the material cannot be collected and discharged by gravity. At present, the powder of the flat-bottomed powder silo is mostly discharged by mechanical means such as auger.

[0005] For example, the national utility model patent with patent number 202220148803.1 discloses a flat-bottomed batching bin discharger, which discharges powder by pushing spiral blades, but this structure has low efficiency. Utility model content:

[0006] In order to solve the above problems and overcome the shortcomings of the prior art, the utility model provides a flat bottom powder bin discharging device;

[0007] The first technical problem to be solved is: the flat-bottom batching bin discharger realizes the discharge of powder by pushing the spiral blades, but this structure has low efficiency.

[0008] The specific technical solution of the utility model to solve the above technical problems is: the flat-bottom powder bin discharging device is arranged on the bottom plate of the powder bin chamber; it is characterized by comprising a hollow decompression cone, the bottom of the decompression cone is fixed to the bottom plate of the powder bin chamber through a connecting column,

[0009] An air inlet pipe is provided on one side of the decompression cone, and the air inlet pipe extends into the interior of the decompression cone and is provided with a constriction structure.

[0010] An air outlet pipe is arranged on the other side of the pressure reducing cone, the air outlet pipe extends to the inside of the pressure reducing cone and an expansion structure is arranged on the air inlet end, and the shrinking structure and the expansion structure are combined into a Venturi structure.

[0011] The air inlet pipe, the shrinking structure, the expanding structure and the air outlet pipe are coaxially arranged;

[0012] A preset number of swirl air pipes are connected to the side wall of the pressure reducing cone in the form of a ring matrix, and the preset number of swirl air pipes are connected to the high-pressure air inlet pipe.

[0013] Furthermore, the opening of the cyclone air pipe is connected to the interior of the decompression cone along the tangent direction of the decompression cone.

[0014] Furthermore, a feed channel is enclosed between the bottom of the decompression cone and the powder bin chamber.

[0015] Furthermore, the high-pressure air inlet pipe is connected to the air outlet pipe of the screw fan.

[0016] Furthermore, the air inlet pipe is arranged to pass through the powder bin chamber and is connected to the air outlet pipe of the Roots blower.

[0017] Furthermore, the air inlet pipe is communicated with the air outlet pipe of the upper-stage pressure reducing cone.

[0018] The beneficial effects of the utility model are:

[0019] One advantage of the utility model is that it provides a flat-bottomed powder bin discharge device with a decompression cone, which can well solve the problem of material accumulation at the feed inlet. The bottom of the decompression cone and the powder bin chamber form a feed channel, which facilitates the material to enter the interior of the decompression cone.

[0020] One advantage of the utility model is that an air outlet pipe is provided on the other side of the pressure reducing cone, the air outlet pipe extends to the inside of the pressure reducing cone and an expansion structure is provided at the air inlet end, the shrinking structure and the expansion structure are combined into a Venturi structure, and the Venturi principle is used to drive the material into the air outlet pipe of the expansion structure to a greater extent and discharge it;

[0021] One advantage of the utility model is that a preset number of swirl air pipes are connected to the side wall of the pressure reducing cone in the form of a ring matrix, which disturbs the flow of powder in the pressure reducing cone through the swirl effect, thereby preventing the material from being blocked at the outlet of the air pipe. Description of the drawings:

[0022] Attached Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Attached Figure 2 This is a schematic diagram of the internal structure of the pressure reducing cone of the utility model; in the accompanying drawings:

[0024] 1. Powder bin chamber; 2. Pressure reducing cone; 3. Cyclone air pipe; 4. High-pressure air inlet pipe; 5. Feed flow channel; 6. Connecting column; 7. Air inlet pipe; 8. Narrowing structure; 9. Expanding structure; 10. Air outlet pipe. Specific implementation method:

[0025] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "rear", "lower left", "upper right", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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 cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] The specific implementation mode of the utility model: the flat-bottom powder bin discharging device is arranged on the bottom plate of the powder bin chamber 1; it is characterized by comprising a hollow decompression cone 2, the bottom of the decompression cone 2 is fixed to the bottom plate of the powder bin chamber 1 through a connecting column 6,

[0027] An air inlet pipe 7 is provided on one side of the decompression cone 2. The air inlet pipe 7 extends into the interior of the decompression cone 2 and is provided with a shrinkage structure 8.

[0028] The other side of the pressure reducing cone 2 is provided with an air outlet pipe 10, which extends to the inside of the pressure reducing cone 2 and has an expansion structure 9 at the air inlet end. The shrinking structure 8 and the expansion structure 9 are combined into a Venturi structure.

[0029] The air inlet pipe 7, the shrinking structure 8, the expanding structure 9 and the air outlet pipe 10 are coaxially arranged;

[0030] A preset number of swirl air pipes 3 are connected to the side wall of the pressure reducing cone 2 in the form of a ring matrix, and the preset number of swirl air pipes 3 are connected to the high-pressure air inlet pipe 4 .

[0031] Furthermore, the opening of the cyclone air pipe 3 is connected to the interior of the decompression cone 2 along the tangent direction of the decompression cone 2 .

[0032] Furthermore, a feed channel 5 is enclosed between the bottom of the decompression cone 2 and the powder bin chamber 1 .

[0033] Furthermore, the high-pressure air inlet pipe 4 is connected to the air outlet pipe of the screw fan.

[0034] Furthermore, the air inlet pipe 7 is passed through the powder bin chamber 1 and is connected to the air outlet pipe of the Roots blower.

[0035] Furthermore, the air inlet pipe 7 is communicated with the air outlet pipe 10 of the pressure reducing cone 2 at the previous stage.

[0036] It should be noted that the utility model is a flat bottom powder bin discharging device. When working,

[0037] 1. The bottom of the decompression cone 2 is fixed to the bottom plate of the powder silo chamber 1 through a connecting column 6, and a feed channel 5 is enclosed between the bottom of the decompression cone 2 and the powder silo chamber 1. In this way, the problem of material accumulation at the feed port of the flat-bottomed powder silo can be well solved. The feed channel facilitates the material to enter the interior of the decompression cone;

[0038] 2. An air outlet pipe 10 is arranged on the other side of the pressure reducing cone 2. The air outlet pipe 10 extends to the inside of the pressure reducing cone 2 and an expansion structure 9 is arranged at the air inlet end. The contraction structure 8 and the expansion structure 9 are combined into a Venturi structure. By using the principle of the Venturi tube, the high-speed airflow will generate negative pressure, and the material will be driven into the air outlet pipe of the expansion structure to a greater extent and discharged;

[0039] 3. A preset number of swirl air pipes 3 are connected in the form of a ring matrix on the side wall of the pressure reducing cone 2. The preset number of swirl air pipes 3 are connected to the high-pressure air inlet pipe 4. The swirl effect is used to disturb the flow of powder in the pressure reducing cone, thereby preventing the material from being blocked at the outlet of the air pipe.

[0040] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A flat-bottom powder silo discharge device, arranged on the bottom plate of a powder silo chamber (1); characterized in that: It comprises a hollow decompression cone (2), the bottom of which is fixed to the bottom plate of the powder bin chamber (1) via a connecting column (6). An air inlet pipe (7) is provided on one side of the pressure reducing cone (2), the air inlet pipe (7) extends into the interior of the pressure reducing cone (2) and is provided with a constriction structure (8). An air outlet pipe (10) is arranged on the other side of the pressure reducing cone (2), the air outlet pipe (10) extends into the interior of the pressure reducing cone (2) and an expansion structure (9) is arranged at the air inlet end, the contraction structure (8) and the expansion structure (9) are combined into a Venturi structure, The air inlet pipe (7), the shrinking structure (8), the expanding structure (9) and the air outlet pipe (10) are coaxially arranged; A preset number of swirl air pipes (3) are connected in the form of a ring matrix on the side wall of the pressure reducing cone (2), and the preset number of swirl air pipes (3) are connected to the high-pressure air intake pipe (4).

2. The flat bottom powder bin discharging device according to claim 1, characterized in that The opening of the cyclone air pipe (3) is connected to the interior of the decompression cone (2) along the tangent direction of the decompression cone (2).

3. The flat bottom powder bin discharging device according to claim 1, characterized in that A feed flow channel (5) is enclosed between the bottom of the pressure reducing cone (2) and the powder bin chamber (1).

4. The flat bottom powder bin discharging device according to claim 1, characterized in that The high-pressure air inlet pipe (4) is connected to the air outlet pipe of the screw fan.

5. The flat bottom powder bin discharging device according to claim 1, characterized in that The air inlet pipe (7) is arranged to pass through the powder bin chamber (1) and is in communication with the air outlet pipe of the Roots blower.

6. The flat bottom powder bin discharging device according to claim 1, characterized in that The air inlet pipe (7) is connected to the air outlet pipe (10) of the pressure reducing cone (2) at the previous stage.

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