Purge cleaning device and dust removal system for powder dispersion test chamber

Abstract

This invention provides a purging and cleaning device for a powder dispersion test chamber, which can effectively purge and clean residual powder adsorbed on the inner wall of the test chamber, facilitating rapid and efficient cleaning of flue gas and powder particles inside the test chamber. The purging and cleaning device for the powder dispersion test chamber includes: an air distribution duct supported on the inner wall of the test chamber and connected to an air compressor via an external air inlet duct; the air distribution duct is equipped with several airflow nozzles communicating with it, and the outlets of the airflow nozzles face the inner wall of the test chamber. Furthermore, this invention also provides a dust removal system for a powder dispersion test chamber, including the aforementioned purging and cleaning device.

Description

Technical Field

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

[0002] Powder test chambers are mainly used to disperse 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] After the powder dispersion test, the powder material needs to be either directly discharged or collected, which involves purging and cleaning the powder test chamber. Existing powder test chambers use a fan installed at the exhaust vent to extract smoke and dust. However, this exhaust dust removal method is ineffective for removing particulate matter, especially particles adsorbed on the inner wall of the test chamber. Utility Model Content

[0004] In view of this, the present invention provides a purging and cleaning device for a powder dispersion test chamber, which can effectively purge and clean residual powder adsorbed on the inner wall of the test chamber, facilitating the rapid and efficient cleaning of flue gas and powder particles inside the test chamber.

[0005] A purging and cleaning device for a powder dispersion test chamber includes: an air distribution duct supported on the inner wall of the test chamber and connected to an air compressor via an external air inlet duct;

[0006] The air distribution duct is equipped with several airflow nozzles that are connected to it, and the air outlets of the airflow nozzles face the inner wall of the test chamber.

[0007] As a preferred embodiment of this utility model, at least one air distribution duct is provided on each inner wall surface of the test chamber.

[0008] As a preferred embodiment of this utility model, the air distribution duct is capable of rotating around its own axis.

[0009] As a preferred embodiment of the present invention: the test chamber body has a front cover, a rear cover, and two side panels;

[0010] Let the normal direction of the side plate be the Y direction, and the normal direction of the front cover and the rear cover be the X direction;

[0011] One or more air distribution ducts arranged along the X direction are installed on the inner wall of each side panel.

[0012] The inner walls of the front cover and the rear cover are each provided with one or more air distribution ducts arranged along the Y direction.

[0013] As a preferred embodiment of this utility model: two air distribution pipes located in the same horizontal plane and in the same direction are grouped together and driven by a power unit to rotate around their own axis.

[0014] The power unit is located outside the test chamber and includes: a motor, a drive shaft, and two drive reversing units; the motor is located at one end of the drive shaft and is used to drive the drive shaft to rotate around its own axis.

[0015] A transmission reversing unit is installed on the drive shaft at a position corresponding to the two air distribution pipes in the corresponding group, so as to realize the reversal of the transmission and drive the corresponding air distribution pipe to rotate around its own axis.

[0016] As a preferred embodiment of this utility model: an optical testing window is machined on the side panel of the test chamber;

[0017] The purging and cleaning device also includes a surrounding airflow branch, which corresponds one-to-one with the optical test window on the side plate and is used to purge and clean the optical test window.

[0018] As a preferred embodiment of the present invention: the surrounding airflow branch is led out by the airflow branch pipe B supported inside the test chamber, and the airflow branch pipe B extends out of the test chamber and is connected to the air compressor through the air inlet hose;

[0019] The surrounding airflow branch includes: an airflow branch pipe A connected to the airflow branch pipe B, and an annular pipe connected to the airflow branch pipe A; a plurality of airflow nozzles are arranged circumferentially on the annular pipe, and the airflow nozzles are connected to the annular pipe.

[0020] As a preferred embodiment of this utility model, the airflow branch pipe A is a telescopic pipe.

[0021] In addition, this utility model also provides a dust removal system for a powder dispersion test chamber, including a purging and cleaning device and an exhaust dust removal unit;

[0022] The purging and cleaning device is the purging and cleaning device described above.

[0023] The exhaust and dust removal unit includes an exhaust pipe installed at the exhaust port on the top cover of the test chamber and an exhaust fan connected to the exhaust pipe.

[0024] Beneficial effects:

[0025] (1) The purging and cleaning device of this utility model sprays positive pressure airflow through the airflow nozzle, which can effectively purge and clean the residual powder adsorbed on the inner wall of the test chamber.

[0026] (2) In the blowing and cleaning device of this utility model, the air distribution pipe can rotate around its own axis to improve its blowing and cleaning efficiency.

[0027] (3) The cleaning device of this utility model has added a surrounding airflow branch to clean the optical test window.

[0028] (4) In the purging and cleaning device of this utility model, the added surrounding airflow branch can also protect the optical test window during the test, and avoid the powder material adsorbing on the optical test window during the test, which will affect the accuracy of the test.

[0029] (5) The dust removal system of this utility model includes a purging and cleaning device and an exhaust dust removal unit. After each test, the purging and cleaning device is turned on to purge and clean the residual powder adsorbed on the inner wall and window of the chamber. Then, in conjunction with the exhaust dust removal unit, it can achieve rapid and efficient cleaning of flue gas and powder particles after the test. Attached Figure Description

[0030] Figure 1 This is a schematic diagram showing the arrangement of the purging and cleaning device of this utility model on the housing. Figure 1 ;

[0031] Figure 2 This is a schematic diagram showing the arrangement of the purging and cleaning device of this utility model on the housing. Figure 2 ;

[0032] Figure 3 This is a schematic diagram showing the arrangement of the purging and cleaning device of this utility model on the housing. Figure 3 ;

[0033] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0034] Figure 5 This is a schematic diagram of the arrangement of the surrounding airflow branches;

[0035] Figure 6 This is a schematic diagram showing the layout of the dust removal system on the powder test chamber.

[0036] The components are: 1-test chamber body, 2-purge and cleaning device, 21-air distribution duct, 22-drive shaft, 23-support rod, 24-airflow nozzle, 25-drive reversing unit, 26-motor, 3-exhaust and dust removal unit, 4-fan, 5-optical test window, 6-test chamber top cover, 8-rear cover, 9-side plate, 10-bottom bracket, 11-front cover, 12-surround airflow branch, 121-airflow branch pipe A, 122-ring pipe, 123-airflow branch pipe B. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0038] Example 1:

[0039] This embodiment provides a purging and cleaning device for a powder dispersion test chamber, which can effectively clean and collect the powder medium after the experiment.

[0040] The powder dispersion test chamber includes a test chamber body 1 and a test chamber top cover 6 disposed on the top of the test chamber body 1; wherein the test chamber body 1 is supported on a bottom support 10.

[0041] The purging and cleaning device is installed on the test chamber 1 and is used to purge and clean different parts inside the test chamber 1.

[0042] like Figures 1-4 As shown, the purging and cleaning device includes an air inlet pipe (usually a flexible hose, not shown in the figure), an air distribution pipe 21, and an airflow nozzle 24 (such as a hood); the air distribution pipe 21 is supported on the inner wall of the test chamber 1; one end of the air distribution pipe 21 extends out of the test chamber 1 and connects to the air inlet pipe, and the position where the air distribution pipe 21 extends out of the test chamber 1 is sealed for airflow; the air inlet pipe is connected to an air compressor to provide compressed air (i.e., the air distribution pipe 21 is connected to the air compressor through the air inlet pipe). Figure 4 As shown, each air distribution duct 21 is equipped with several airflow nozzles 24, which are connected to the air distribution duct 21 and the air outlet of the airflow nozzles 24 faces the inner wall of the test chamber 1.

[0043] Each inner wall surface of the test chamber 1 shall be provided with at least one air distribution duct 21.

[0044] As an example, all the air inlets in this purging and cleaning device are connected to the same air compressor via a multi-port connector.

[0045] The air compressor supplies compressed air to each air distribution duct 21 through the air inlet pipe. The compressed air in the air distribution duct 21 is blown out by the airflow nozzle 24 to form a positive pressure airflow toward the inner wall of the test chamber 1, which blows away the residual powder adsorbed on the inner wall of the test chamber 1.

[0046] This purging and cleaning device can purge and clean the residual powder adsorbed on the inner wall of the test chamber 1, achieving rapid and efficient cleaning of flue gas and powder particles inside the test chamber 1 after the test.

[0047] Example 2:

[0048] Based on the above embodiment 1 or embodiment 2, the further air distribution duct 21 can rotate 360° around its own axis to achieve efficient cleaning of the inner wall of the box.

[0049] Specifically: Both ends of the air distribution duct 21 are rotatably supported (e.g., by bearings) on the test chamber body 1, and one end extends out of the test chamber body 1 and connects to the air inlet duct. The air distribution duct 21 is connected to the air inlet duct at this connection point by a dynamic seal (rotary dynamic seal) (when the air distribution duct 21 rotates around its own axis, the air inlet duct does not rotate).

[0050] The other end of the air distribution duct 21 extends out of the test chamber body 1 and is connected to a power unit (such as a rotary motor) to drive the air distribution duct 21 to rotate 360° around its own axis. As an example, the power unit is supported on the outer wall of the test chamber body 1 by a support plate.

[0051] Example 3:

[0052] Based on the above embodiment 1 or embodiment 2, this embodiment provides a specific arrangement of the air distribution duct 21.

[0053] Several air distribution pipes 21 are distributed at different heights on the test chamber 1 to blow and clean different parts inside the test chamber 1.

[0054] As an example, such as Figures 1-4 As shown, in this example, the test chamber 1 has a front cover plate 11, a rear cover plate 8, and two side plates 9 on the left and right sides, wherein the side plates 9 are machined with optical test windows 5.

[0055] For ease of description, let the length of the test chamber body 1 be the Y-direction (i.e., the normal direction of the side panel 9), and the width be the X-direction (i.e., the normal direction of the front and rear cover panels), as follows: Figure 3 As shown.

[0056] In this example, the test chamber 1 has six air distribution ducts 21 inside. Each side panel 9 corresponds to two air distribution ducts 21 arranged along the X direction. Each air distribution duct 21 arranged along the X direction has several airflow nozzles 24 distributed at intervals along the X direction for purging the inner wall of the corresponding side panel 9. Figure 2 As shown, two air distribution pipes 21 arranged along the X direction, corresponding to the inner wall of each side plate 9, are located at the upper and lower parts of the optical test window 5 on the corresponding inner wall, respectively.

[0057] The inner wall of the rear cover plate 8 corresponds to a Y-direction air distribution duct 21, and the inner wall of the front cover plate 11 corresponds to a Y-direction air distribution duct 21; each Y-direction air distribution duct 21 has several airflow nozzles 24 spaced apart along the Y direction for purging the inner wall of the rear cover plate 8 or the front cover plate 11.

[0058] As an example, both the air inlet duct 22 and the air distribution duct 21 are made of stainless steel.

[0059] As an example, the distance between the air distribution duct 21 and the inner wall of the corresponding test chamber 1 is 100 mm.

[0060] As an example, such as Figure 4 As shown, each airflow nozzle mounting position on the air distribution duct 21 is provided with two airflow nozzles 24. One airflow nozzle 24 faces the inner wall surface of the corresponding test chamber 1, and the other airflow nozzle 24 faces the inner bottom surface of the test chamber 1.

[0061] As an example, the middle part of the air distribution duct 21 (the position between the two ends) is also supported on the inner wall of the test chamber 1 by a support rod 23 to improve its stability.

[0062] Example 4:

[0063] This embodiment provides a specific method for installing a power unit on the air distribution duct 21 in the above embodiment 3.

[0064] In this example, the six air distribution ducts 21 are divided into three groups. The two X-direction air distribution ducts 21 located at the top of the left and right side plates 9 are located on the same horizontal plane and form the first group of air distribution ducts. The two X-direction air distribution ducts 21 located at the bottom are located on the same horizontal plane and form the second group of air distribution ducts. The two air distribution ducts 21 arranged along the Y direction are located on the same horizontal plane and form the third group of air distribution ducts. Each group of two air distribution ducts 21 corresponds to one power unit, that is, one power unit drives two air distribution ducts 21 to rotate simultaneously.

[0065] This can be understood as follows: in this example, two air distribution ducts located on the same horizontal plane and in the same direction are driven by a single power unit as a group.

[0066] In this example, the power unit includes: a motor 26, a drive shaft 22, and two drive reversing units 25; the motor 26 is located at one end of the drive shaft 22 and is used to drive the drive shaft 22 to rotate around its own axis; wherein the drive shaft 22 in the power unit corresponding to the first group of air distribution pipes and the second group of air distribution pipes is arranged along the Y direction, and the drive shaft 22 in the power unit corresponding to the third group of air distribution pipes is arranged along the X direction.

[0067] A transmission reversing unit 25 is installed on the drive shaft 22 at a position corresponding to each of the two air distribution ducts 21 in the corresponding group, so as to realize the reversal of the transmission and drive the corresponding air distribution duct 21 to rotate around its own axis. Thus, when the motor 26 drives, it drives the two air distribution ducts 21 to rotate through the drive shaft 22 and the transmission reversing unit 25.

[0068] As an example, the transmission reversing unit 25 adopts a gear reversing transmission mechanism, such as reversing through two meshing bevel gears. In this case, a bevel gear A is arranged on the transmission shaft 22 at a position corresponding to the two air distribution pipes 21 in the corresponding group, and the air distribution pipe 21 is connected to the gear shaft of the bevel gear B that meshes with the bevel gear A.

[0069] Example 5:

[0070] Based on the above embodiments 1, 2, 3 or 4, in order to clean the optical test window 5 on the side panel 9 of the test chamber 1, the purging and cleaning device is further provided with a surrounding airflow branch 12 for cleaning the optical test window 5.

[0071] The surrounding airflow branch 12 corresponds one-to-one with the optical test window 5 on the side plate 9, that is, a surrounding airflow branch 12 is set for each optical test window 5 to clean the optical glass of the optical test window 5. In this example, each side plate 9 is provided with three optical test windows 5, and the optical test windows 5 on two side plates 9 that are coaxial form a group.

[0072] like Figure 5 As shown, the surrounding airflow branch 12 is led out by an airflow branch pipe B123 supported inside the test chamber 1. After extending out of the test chamber 1, the airflow branch pipe B123 is connected to the air compressor via an air inlet hose. The airflow branch pipe B123 can be a gas pipeline arranged along the X direction and set separately inside the test chamber 1, or it can be the air distribution pipe 21 arranged along the X direction and set above the optical test window 5 in the above embodiment 3 (i.e., the surrounding airflow branch 12 is directly led out from the air distribution pipe 21 arranged along the X direction). It is worth noting that the air distribution pipe 21 with the surrounding airflow branch 12 does not have the function of rotating 360° around its own axis.

[0073] The surrounding airflow branch 12 includes: an airflow branch pipe A121 connected to the airflow branch pipe B123, and an annular pipe 122 connected to the airflow branch pipe A121; a plurality of airflow nozzles 24 are arranged circumferentially on the annular pipe 122, and the airflow nozzles 24 are connected to the annular pipe 122.

[0074] As an example, the diameter of the annular tube 122 is larger than the diameter of the optical test window 5, without affecting the optical path of the optical test window 5. Therefore, during the experiment, the surrounding airflow branch 12 can also be activated to protect the optical test window 5 from airflow, preventing powder materials from adsorbing on the optical test window 5 during the experiment and affecting the accuracy of the experiment.

[0075] As an example, the airflow branch pipe A121 is an electrically telescopic pipe that can be controlled to extend and retract by an external control unit. Thus, when the test chamber is conducting a test, the airflow branch pipe A121 can be controlled not to extend. When purging and cleaning are required, the airflow branch pipe A121 is controlled to extend, so that the airflow nozzles 24 on the annular pipe 122 face the optical test window 5. After airflow is introduced into the airflow branch pipe B123, the airflow is led out by the surrounding airflow branch 12 to the annular pipe 122. The cleaning function of the optical window is achieved through the airflow nozzles 24 arranged around the optical test window 5 on the annular pipe 122.

[0076] This positive pressure airflow cleaning device has functions of powder cleaning and window cleaning protection, and can meet the cleaning rate of more than 90% for powder particles.

[0077] Example 6:

[0078] Based on the above embodiments 1, 2, 3 or 4, in order to clean the optical test window 5 on the side panel 9 of the test chamber 1, the purging and cleaning device is further equipped with an airflow spray gun for cleaning the optical test window 5.

[0079] The airflow spray gun is connected to an air compressor. After the test, the airflow spray gun is inserted into the test chamber 1 (the test chamber 1 is equipped with a door) to clean the optical test window 5. As an example, the airflow spray gun is a telescopic airflow spray gun.

[0080] Example 7:

[0081] This embodiment provides a dust removal system for a powder dispersion test chamber, such as... Figure 6 As shown, the dust removal system includes the blowing and cleaning device 2 described in embodiments 1-6 above, and also includes an exhaust dust removal unit 3 installed at the exhaust port of the test chamber top cover 6. The exhaust dust removal unit 3 includes an exhaust pipe installed at the exhaust port of the test chamber top cover 6 and an exhaust fan connected to the exhaust pipe.

[0082] After each test, the purging and cleaning device 2 is activated to purge and clean the residual powder adsorbed on the inner wall and windows of the test chamber 1. Then, in conjunction with the exhaust and dust removal unit 3, the exhaust fan extracts the flue gas and powder particles from the test chamber 1 after the test, achieving rapid and efficient cleaning of the test chamber.

[0083] As an example, the bottom surface of the test chamber 1 is also equipped with a fan 4 for powder stirring and dispersion. The fan 4 can also be used for dust removal. That is, when cleaning the test chamber 1, the blowing and cleaning device and the fan 4 are started, in conjunction with the exhaust dust removal unit 3.

[0084] 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 purging and cleaning device for a powder dispersion test chamber, characterized in that: include: A distribution duct (21) is supported on the inner wall of the test chamber (1) and connected to the air compressor through an external air inlet duct; The air distribution pipe (21) is provided with a number of airflow nozzles (24) connected to it, and the air outlets of the airflow nozzles (24) face the inner wall of the test chamber (1).

2. The purging and cleaning device for a powder dispersion test chamber as described in claim 1, characterized in that, At least one air distribution duct (21) is provided on each inner wall surface of the test chamber (1).

3. The purging and cleaning device for a powder dispersion test chamber as described in claim 1 or 2, characterized in that, The air distribution duct (21) is capable of rotating about its own axis.

4. The purging and cleaning device for a powder dispersion test chamber as described in claim 1 or 2, characterized in that, The test chamber body (1) has a front cover plate (11), a rear cover plate (8) and two side plates (9) on the left and right sides; Let the normal direction of the side plate (9) be Y, and the normal direction of the front cover plate (11) and the rear cover plate (8) be X; Each side panel (9) has one or more air distribution ducts (21) arranged along the X direction on its inner wall surface. The inner walls of the front cover plate (11) and the rear cover plate (8) are each provided with one or more air distribution pipes (21) arranged along the Y direction.

5. The purging and cleaning device for a powder dispersion test chamber as described in claim 4, characterized in that, Two air distribution pipes (21) located in the same horizontal plane and in the same direction are grouped together and driven by a power unit to rotate around their own axis; The power unit is located outside the test chamber (1) and includes: a motor (26), a transmission shaft (22) and two transmission reversing units (25); the motor (26) is located at one end of the transmission shaft (22) and is used to drive the transmission shaft (22) to rotate around its own axis; A transmission reversing unit (25) is provided on the transmission shaft (22) at a position corresponding to each of the two air distribution pipes (21) to realize the reversal of the transmission so as to drive the corresponding air distribution pipe (21) to rotate around its own axis.

6. The purging and cleaning device for a powder dispersion test chamber as described in claim 1 or 2, characterized in that, An optical testing window (5) is machined on the side panel (9) of the test chamber body (1); The purging and cleaning device also includes a surrounding airflow branch (12), which corresponds one-to-one with the optical test window (5) on the side plate (9) and is used to purge and clean the optical test window (5).

7. The purging and cleaning device for a powder dispersion test chamber as described in claim 6, characterized in that, The surrounding airflow branch (12) is led out by the airflow branch pipe B (123) supported inside the test chamber body (1). The airflow branch pipe B (123) extends out of the test chamber body (1) and is connected to the air compressor through the air inlet hose. The surrounding airflow branch (12) includes: an airflow branch pipe A (121) connected to the airflow branch pipe B (123), and an annular pipe (122) connected to the airflow branch pipe A (121); a plurality of airflow nozzles (24) are arranged circumferentially on the annular pipe (122), and the airflow nozzles (24) are connected to the annular pipe (122).

8. The purging and cleaning device for a powder dispersion test chamber as described in claim 7, characterized in that, The airflow branch pipe A(121) is a telescopic pipe.

9. A dust removal system for a powder dispersion test chamber, characterized in that, It includes a purge cleaning device (2) and an exhaust dust removal unit (3); The blowing and cleaning device (2) is the blowing and cleaning device according to any one of claims 1-8 above; The exhaust and dust removal unit (3) includes an exhaust pipe installed at the exhaust port of the test chamber top cover (6) and an exhaust fan connected to the exhaust pipe.

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