Feed dispersing device for powder test box

Abstract

The utility model provides a feed dispersing device for a powder test box, which can enable the concentration space distribution of powder particles in the test box to be more uniform, and improve the effective dispersion rate of powder materials and the accuracy of a dispersion test. The feeding and dispersing device comprises a hopper for containing a powder material; the feeding pipe is communicated with the hopper; the conveying unit is used for conveying the powder material in the feeding pipe to a feeding port, and the feeding port is communicated with a box body of the powder test box; and the air blower is used for blowing the powder material conveyed to the feeding opening into the box body.

Description

Technical Field

[0001] This utility model relates to a feeding and dispersing device for a test chamber, specifically a feeding and dispersing device for a powder test chamber, belonging to the field of powder testing technology. Background Technology

[0002] Powder test chambers are mainly used to separate similar powder materials (such as powder smoke materials) to form aerosols or similar dispersion systems, supporting the conduct of related tests such as concentration and photoelectric effect.

[0003] The existing powder dispersion test chamber is powered by a fan at the bottom of the chamber. During testing, the powder material is sprinkled on the bottom surface of the chamber, and the airflow provided by the fan disperses the powder material within the chamber space, allowing for the measurement of relevant test data. However, the existing powder dispersion test chamber has the following problems in actual testing:

[0004] (1) Low effective dispersion of powder

[0005] In actual tests, after the fan was turned on, most of the powder failed to disperse effectively and remained deposited on the bottom surface of the chamber or piled up in local areas such as the corners of the chamber, instead of being suspended in the chamber space, resulting in a low effective dispersion rate of the powder.

[0006] (2) Uneven distribution of powder concentration in space

[0007] In actual tests, the concentration distribution of powder carried by the fan airflow is uneven in different spatial locations within the chamber, with significant local concentration differences, which affects the accuracy of the test data. Utility Model Content

[0008] In view of this, the present invention provides a feeding and dispersing device for a powder test chamber, which can make the spatial distribution of powder particle concentration in the test chamber more uniform, improve the effective dispersion rate of smoke powder and the accuracy of dispersion test.

[0009] The technical solution of this utility model is: a feeding and dispersing device for a powder testing chamber, comprising:

[0010] A hopper for holding powder materials;

[0011] A feeding pipe connected to the hopper;

[0012] A conveying unit for conveying powder material in the feeding pipe to the feeding port, the feeding port being connected to the body of the smoke screen test chamber;

[0013] A blower used to blow powder materials conveyed to the feed port into the housing.

[0014] In a preferred embodiment of this utility model, the conveying unit includes a screw and a drive motor; one end of the screw is connected to the drive motor, and the other end extends into the inside of the feeding pipe; the portion of the screw located inside the feeding pipe is provided with helical blades; when the screw rotates, it conveys the powder material that has entered the feeding pipe from the hopper forward.

[0015] As a preferred embodiment of this utility model, it also includes a fan disposed inside the housing.

[0016] As a preferred embodiment of this utility model: the air outlet of the blower is connected to the feeding pipe through the air inlet pipe, and the connection position is located on the side where the feeding pipe connects to the box.

[0017] In a preferred embodiment of this utility model, the air inlet of the blower is connected to the housing.

[0018] As a preferred embodiment of this utility model: the hopper adopts a barrel-shaped structure with a cylindrical upper part and a conical bottom, and the small end of the bottom conical part is connected to the feeding pipe.

[0019] As a preferred embodiment of this utility model: the top opening of the hopper is provided with an openable and closable top cover that is sealed by a sealing ring.

[0020] In a preferred embodiment of this utility model, the upper part of the hopper is connected to the box body through a pressure balance port.

[0021] Beneficial effects:

[0022] (1) The feeding and dispersing device of this utility model can efficiently and stably convey powder materials into the box by means of a conveying unit and a blower, and can make the powder materials evenly dispersed into the box.

[0023] (2) In the feeding and dispersing device of this utility model, the conveying unit adopts screw conveying, which can realize the continuous conveying of powder materials, and can adjust the speed through frequency converter to realize the function of feeding flow rate adjustment.

[0024] (3) In the feeding and dispersing device of this utility model, by arranging a fan in the box, the powder material conveyed to the box can be stirred and dispersed, so that it is fully and evenly dispersed in the box and in a suspended state, and the particle concentration distribution is more uniform.

[0025] (4) In the feeding and dispersing device of this utility model, the upper part of the hopper is connected to the box through the pressure balance port, which can promote the pressure balance between the hopper and the box, and then utilize the output of powder material. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the feeding and dispersing device of this utility model;

[0027] Figure 2 This is a schematic diagram of the installation of the feeding and dispersing device of this utility model on a powder test chamber;

[0028] Among them: 1-hopper, 2-feeding pipe, 3-conveying unit, 31-screw, 4-blower, 5-air inlet pipe, 6-box, 7-fan, 8-pressure balance port, 9-feeding port, 10-air inlet. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0030] Example 1:

[0031] This embodiment provides a feeding and dispersing device for a smoke screen test chamber, which can effectively transport and disperse powder materials into the interior of the smoke screen test chamber, making the spatial distribution of powder particle concentration in the test chamber more uniform, thereby improving the accuracy of the dispersion test. In this example, the powder material is a powder smoke screen material.

[0032] This dispersing and feeding device can achieve rapid and efficient conveying of dispersing media (such as powder smoke materials), such as... Figure 1 As shown, the distributed feeding device includes: hopper 1, conveying unit 3 and blower 4.

[0033] like Figure 2 As shown, the dispersive feeding device is set outside the smoke test chamber. The hopper 1 is used to hold powder materials. The lower end of the hopper 1 is connected to the feeding pipe 2. The feeding pipe 2 is connected to the internal space of the box 6 of the powder test chamber through the feeding port 9, so as to feed the material into the box 6.

[0034] As an example, the hopper 1 adopts a barrel-shaped structure with a cylindrical upper part and a conical bottom, and the small end of the bottom cone is connected to the feeding pipe 2.

[0035] As an example, the top opening of hopper 1 is provided with an openable and closable cover that is sealed by a sealing ring.

[0036] As an example, the feeding pipe 2 is inserted into the bottom plate of the box 6 and communicates with the box 6, that is, the feeding port 9 of the feeding pipe 2 is located on the bottom plate of the box 6.

[0037] The powder material in hopper 1 enters the housing 6 from the feeding pipe 2 under the action of the conveying unit 3 and the blower 4. The conveying unit 3 adopts a screw conveying method, and the blower 4 is used to blow the powder material conveyed by the conveying unit 3 into the housing 6. That is, this dispersing and feeding device uses screw conveying and blower 4 to convey powder material into the housing 6. The conveying unit 3 uses the mechanical thrust generated by the rotation of the screw 31 to continuously convey the powder material from hopper 1 to the feeding port 9. The blower 4 generates positive pressure to blow the powder material conveyed by the screw 31 into the housing 6 and assists in dispersing the material.

[0038] The conveying unit 3 includes a screw 31 and a drive motor, which drives the screw 31 to rotate. One end of the screw 31 is connected to the drive motor, and the other end extends into the feed pipe 2. The portion of the screw 31 located inside the feed pipe 2 is equipped with helical blades. Thus, when the screw 31 rotates, it conveys the powder material that enters the feed pipe 2 from the lower end of the hopper 1 forward. This conveying method enables continuous conveying of powder materials.

[0039] As an example, the conveying unit 3 adjusts the speed via a frequency converter to achieve the function of adjusting the feeding flow rate.

[0040] The air outlet of the blower 4 is connected to the feed pipe 2 through the air inlet pipe 5, and the connection position is located at the front end of the screw 31, that is, the side where the feed pipe 2 connects to the housing 6. The blower 4 blows the powder material conveyed by the screw 31 into the housing 6. The setting of the blower 4 can disperse the powder material, so that the powder material is evenly dispersed in the housing 6.

[0041] As an example, the air inlet 10 of the blower 4 is connected to the housing 6, using the gas in the housing 6 (preventing outside air from entering the housing 6) and returning it to the inside of the housing 6.

[0042] As an example, the upper part of the hopper 1 is connected to the box 6 through the pressure balance port 8, which promotes the pressure balance between the hopper 1 and the box 6, thereby utilizing the output of powder materials.

[0043] As an example, the feed tube 2 is provided with a connecting piece for fixing it to the outer wall of the housing 6.

[0044] Example 2:

[0045] Based on the above embodiment 1, the feeding and dispersing device further includes a fan 7 disposed inside the housing 6.

[0046] like Figure 2 As shown, several fans 7 are distributed on the inner bottom plate of the box 6. The fans 7 can stir and disperse the powder material that is fed into the box 6 through the feed port 9, so that it is fully and evenly dispersed in the box 6 and in a suspended state, so as to carry out relevant tests later.

[0047] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A feed dispersing device for a powder test chamber, characterized by: include: Hopper (1) for holding powder materials; Feeding pipe (2) connected to the hopper (1); A conveying unit (3) for conveying the powder material in the feeding pipe (2) to the feeding port (9), the feeding port (9) being connected to the box body (6) of the powder test chamber; A blower (4) for blowing powder material delivered to the feed port (9) into the housing (6).

2. The feeding and dispersing device for a powder testing chamber as described in claim 1, characterized in that, The conveying unit (3) includes: a screw (31) and a drive motor; One end of the screw (31) is connected to the drive motor, and the other end extends into the feed tube (2); The portion of the screw (31) located inside the feeding pipe (2) is provided with helical blades; when the screw (31) rotates, it will convey the powder material that enters the feeding pipe (2) from the hopper (1) forward.

3. The powder feeding and dispersing apparatus for a powder testing chamber according to claim 1, wherein It also includes a fan (7) installed inside the housing (6).

4. The powder feeding and dispersing apparatus for a powder testing chamber according to claim 1 or 2 or 3, wherein The air outlet of the blower (4) is connected to the feeding pipe (2) through the air inlet pipe (5), and the connection point is located on the side where the feeding pipe (2) connects to the housing (6).

5. The powder feeding and dispersing apparatus for a powder testing chamber according to claim 1 or 2 or 3, wherein The air inlet (10) of the blower (4) is connected to the housing (6).

6. The powder feeding and dispersing apparatus for a powder testing chamber according to claim 1 or 2 or 3, wherein The hopper (1) adopts a barrel-shaped structure with a cylindrical upper part and a conical bottom, and the small end of the bottom cone is connected to the feeding pipe (2).

7. The powder feeding and dispersing apparatus for a powder testing chamber according to claim 1 or 2 or 3, wherein The hopper (1) is provided with an openable and closable top cover that is sealed by a sealing ring at the top opening.

8. The feeding and dispersing device for a powder testing chamber as described in claim 1, 2, or 3, characterized in that, The upper part of the hopper (1) is connected to the box (6) through a pressure balance port (8).

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