Dry powder recovery device and recovery method thereof

Abstract

The invention belongs to the technical field of fire extinguishers, and particularly relates to a dry powder recovery device and a recovery method thereof.The dry powder recovery device comprises a rack, and a recovery cylinder, a negative pressure assembly, a filter screen, a self-cleaning assembly and a blowing assembly are arranged on the rack. A recycling pipeline is arranged on the recycling barrel; the negative pressure assembly is used for forming negative pressure in the recycling barrel to recycle dry powder in the fire extinguisher; the filter screen is arranged in the recycling barrel and is used for filtering the dry powder recycled into the recycling barrel; the self-cleaning assembly is used for recycling large-particle impurities which do not pass through the surface of the filter screen; and the blowing assembly is used for blowing at the bent part of the recovery pipeline to prevent the bent part from being blocked. Negative pressure is formed in the recycling barrel through the negative pressure assembly, dry powder in the fire extinguisher is recycled into the recycling barrel through the recycling pipeline and then is discharged and recycled from the powder outlet after being filtered through the filter screen, the self-cleaning assembly is arranged to prevent the filter screen from being blocked, the blowing assembly can prevent the bent position of the recycling pipeline from being blocked, and the recycling efficiency is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of fire extinguisher technology, and particularly relates to a dry powder recovery device and its recovery method. Background Technology

[0002] Generally, fire extinguishers are broadly classified into dry powder fire extinguishers, gas fire extinguishers, liquid and foam fire extinguishers, and clean air fire extinguishers. Dry powder fire extinguishers, in particular, use fine extinguishing powder, pressurized or concentrated within a main container, as an extinguishing agent and then radiating it. The components include steel parts (main container, lever, safety pin, pressurized gas container, etc.), aluminum parts (cap, gas inlet pipe, powder outlet pipe), rubber and resin parts (hose, nozzle, etc.), and dry powder.

[0003] Dry powder fire extinguishers are widely used in daily life. According to the GA95-2007 standard, dry powder fire extinguishers must be maintained every two years, and the cylinders must undergo a hydrostatic test. Before the hydrostatic test, the old dry powder must be emptied, a process known as dry powder recovery. After the hydrostatic test is passed, the dry powder can be refilled.

[0004] The existing dry powder recovery method involves directly opening the fire extinguisher bottle and emptying the old dry powder. Because the dry powder is fine and lightweight, this emptying process causes dust pollution, which can lead to respiratory illnesses and affect the health of people who work with it for extended periods. Furthermore, the dust dispersed into the atmosphere causes environmental pollution. The utility model patent "Recovery and Filling Device for Dry Powder Fire Extinguishers" (patent number "200720141399.0") discloses a recovery and filling device for dry powder fire extinguishers that uses an air pump to recover the dry powder. However, its filter lacks a self-cleaning function, has a short lifespan, and does not differentiate between pressurized and non-pressurized fire extinguishers, resulting in low efficiency and low dry powder recovery rate. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned technical problems by providing a dry powder recovery device and method, thereby ensuring recovery efficiency.

[0006] In view of this, the present invention provides a dry powder recovery device, including a frame, on which are arranged: A recovery cylinder is provided with a recovery pipe for connecting to a fire extinguisher, and the recovery cylinder is provided with an openable and closable powder outlet. A negative pressure assembly, which is used to create a negative pressure inside the recovery cylinder to recover the dry powder in the fire extinguisher; A filter screen is installed inside the recovery cylinder and is used to filter out the dry powder that is returned to the recovery cylinder. The self-cleaning component is used to recover large particulate impurities that have not passed through the filter screen on its surface; A blowing assembly is used to blow air at bends in the recovery pipe to prevent blockages at the bends.

[0007] In this technical solution, a negative pressure component is used to create a negative pressure inside the recovery cylinder, which draws the dry powder from the fire extinguisher into the recovery cylinder through the recovery pipe. The powder is then filtered through a filter screen and discharged from the powder outlet. A self-cleaning component is provided to prevent the filter screen from becoming clogged, and a blowing component is provided to prevent clogging at bends in the recovery pipe, ensuring recovery efficiency.

[0008] Furthermore, the recycling pipeline is L-shaped.

[0009] Furthermore, the blowing assembly includes: A blow hole is provided at the front of the bend in the recycling pipe; The base sleeve is fixedly installed inside the blow hole. A bending channel is opened inside the base sleeve. The bending channel includes a straight hole and an inclined hole. The straight hole is connected to the air pipe, and the inclined hole is inclined towards the bend of the recovery pipe. The blowpipe is rotatably mounted in an inclined hole via a connecting structure, and a spiral channel is provided inside the blowpipe.

[0010] In this technical solution, the high-pressure gas in the air pipe enters the straight hole and flows into the inclined hole and the spiral channel of the blowpipe. The spiral channel in the blowpipe can make the blowpipe rotate in the base sleeve when the high-pressure gas passes through. During the rotation, the high-pressure gas sprayed out by the blowpipe can cover as much of the dry powder accumulated in the bend of the recovery pipe as possible, so as to achieve the purpose of cleaning the dry powder in the recovery pipe and preventing the dry powder from accumulating too much and clogging the bend of the recovery pipe.

[0011] Furthermore, the connection structure includes a limiting screw sleeve, which limits the blow pipe within the inclined hole.

[0012] Furthermore, the outer circumference of the limiting screw sleeve has threads that can be threaded to the inclined hole, and the blow pipe is T-shaped and sleeved inside the limiting screw sleeve.

[0013] Furthermore, there is an angle between the straight hole and the inclined hole, and the angle is set to 30 degrees.

[0014] Furthermore, the self-cleaning component includes a top cover, which is fixedly installed above the recycling cylinder. A drive motor is fixedly installed inside the top cover. The output shaft of the drive motor passes through the top of the recycling cylinder, enters the recycling cylinder, and is fixedly connected to the center of the filter screen. A gap is provided between the filter screen and the inner wall of the recycling cylinder for collecting waste.

[0015] Furthermore, a receiving plate is provided in the gap between the filter screen and the inner wall of the recycling cylinder. The receiving plate is spiraled downwards, and a waste pipe for recycling waste is provided at the lowest point of the receiving plate.

[0016] In this technical solution, the drive motor starts and drives the filter screen to rotate, causing large particles of impurities that have not passed through the filter screen to be thrown into the gap between the filter screen and the inner wall of the recycling cylinder due to centrifugal force, and then recycled to the outside of the recycling cylinder by the waste pipe.

[0017] Furthermore, the negative pressure assembly includes a vacuum pump and a negative pressure pipe. The vacuum pump is mounted on a frame outside the recovery cylinder, and one end of the negative pressure pipe is connected to the vacuum pump, while the other end extends into the recovery cylinder.

[0018] Furthermore, the dry powder recovery method is as follows: first, the blowing assembly is activated to blow at the bend of the recovery pipe to prevent blockage at the bend; then, the self-cleaning assembly is activated to recover large particulate impurities that have not passed through the filter screen; then, the negative pressure assembly is activated to suck the dry powder from the fire extinguisher with the cap removed into the recovery cylinder through the recovery pipe, and after being filtered by the filter screen, it is discharged from the powder outlet for recovery.

[0019] The beneficial effects of this invention are: 1. A negative pressure is created inside the recovery cylinder by the negative pressure component, which draws the dry powder from the fire extinguisher into the recovery cylinder through the recovery pipe. The powder is then filtered through the filter screen and discharged from the powder outlet. A self-cleaning component is installed to prevent the filter screen from being clogged, and a blowing component is installed to prevent clogging at the bends of the recovery pipe, ensuring recovery efficiency.

[0020] 2. After the high-pressure gas in the air pipe enters the straight hole, it flows into the inclined hole and the spiral channel of the blowpipe. The spiral channel in the blowpipe can make the blowpipe rotate in the base sleeve when the high-pressure gas passes through. During the rotation, the high-pressure gas sprayed out by the blowpipe can cover as much of the dry powder accumulated in the bend of the recovery pipe as possible, so as to clean the dry powder in the recovery pipe and prevent the dry powder from accumulating too much and clogging the bend of the recovery pipe. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the present invention; Figure 2 This is a cross-sectional view of the recycling bin; Figure 3 It is a 3D diagram of the recycling pipeline; Figure 4 This is a cross-sectional view of the recycling pipeline; Figure 5 yes Figure 4 A magnified view of a portion of the image; Figure 6 This is an exploded view of the blowpipe and the limiting screw sleeve.

[0022] The markings in the diagram are as follows: 1. Frame; 2. Recycling cylinder; 3. Recycling pipe; 4. Powder outlet; 5. Filter screen; 6. Powder jet assembly; 7. Powder jet hole; 8. Base sleeve; 9. Bending channel; 10. Straight hole; 11. Inclined hole; 12. Powder jet pipe; 13. Spiral channel; 14. Limiting screw sleeve; 15. Top cover; 16. Drive motor; 17. Receiving plate; 18. Waste pipe; 19. Vacuum pump; 20. Negative pressure pipe. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0024] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0025] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0026] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0027] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0028] Example 1 like Figure 1-6 As shown, a dry powder recovery device includes a frame 1, on which: The recycling cylinder 2 is equipped with a recycling pipe 3, which is used to connect to the fire extinguisher. The recycling cylinder 2 is also equipped with an openable and closable powder outlet 4. A negative pressure assembly is used to create a negative pressure inside the recovery cylinder 2 to recover the dry powder inside the fire extinguisher. Filter screen 5 is disposed inside the recovery cylinder 2 and is used to filter the dry powder returned to the recovery cylinder 2; The self-cleaning component is used to recover large particulate impurities that have not passed through the filter screen 5 on its surface; The blowing assembly 6 is used to blow air at the bends of the recycling pipe 3 to prevent blockage at the bends.

[0029] The negative pressure component creates a negative pressure inside the recovery cylinder 2, which draws the dry powder from the fire extinguisher back into the recovery cylinder 2 through the recovery pipe 3. The powder is then filtered through the filter screen 5 and discharged from the powder outlet 4. A self-cleaning component is provided to prevent the filter screen 5 from becoming clogged, and a blowing component 6 can prevent clogging at the bends of the recovery pipe 3, ensuring recovery efficiency.

[0030] The recovery pipe 3 is L-shaped. The jetting assembly 6 includes: The blow hole 7 is located at the front of the bend in the recycling pipe 3; The base sleeve 8 is fixedly installed inside the blow hole 7. A bending channel 9 is provided inside the base sleeve 8. The bending channel 9 includes a straight hole 10 and an inclined hole 11. The straight hole 10 is connected to the air pipe, and the inclined hole 11 is inclined towards the bend of the recovery pipe 3. The blowpipe 12 is rotatably mounted in the inclined hole 11 via a connecting structure, and a spiral channel 13 is provided inside the blowpipe 12.

[0031] After the high-pressure gas in the air pipe enters the straight hole 10, it flows into the inclined hole 11 and the spiral channel 13 of the blow pipe 12. The spiral channel 13 in the blow pipe 12 can make the blow pipe 12 rotate in the base sleeve 8 when the high-pressure gas passes through. During the rotation, the high-pressure gas sprayed out by the blow pipe 12 can cover as much of the dry powder accumulated in the bend of the recovery pipe 3 as possible, so as to achieve the purpose of cleaning the dry powder in the recovery pipe 3 and preventing the dry powder from accumulating too much and causing blockage in the bend of the recovery pipe 3.

[0032] The connection structure includes a limiting screw sleeve 14, which limits the blow pipe 12 within the inclined hole 11.

[0033] The limiting screw sleeve 14 has threads on its outer periphery that can be threaded to the inclined hole 11, and the blow pipe 12 is T-shaped and sleeved inside the limiting screw sleeve 14.

[0034] There is an included angle between the straight hole 10 and the inclined hole 11, and the included angle is set to 30 degrees.

[0035] The self-cleaning component includes a top cover 15, which is fixedly installed above the recycling cylinder 2. A drive motor 16 is fixedly installed inside the top cover 15. The output shaft of the drive motor 16 passes through the top of the recycling cylinder 2, enters the recycling cylinder 2, and is fixedly connected to the center of the filter screen 5. A gap is provided between the filter screen 5 and the inner wall of the recycling cylinder 2 for collecting waste.

[0036] A receiving plate 17 is installed in the gap between the filter screen 5 and the inner wall of the recovery cylinder 2. The receiving plate 17 is spirally downward, and a waste pipe 18 for recycling waste is provided at the lowest point of the receiving plate 17. When the drive motor 16 starts, it drives the filter screen 5 to rotate, causing large particles of impurities that have not passed through the filter screen 5 to be thrown into the gap between the filter screen 5 and the inner wall of the recovery cylinder 2 by centrifugal force, and then recycled to the outside of the recovery cylinder 2 by the waste pipe 18.

[0037] The negative pressure assembly includes a vacuum pump 19 and a negative pressure pipe 20. The vacuum pump 19 is mounted on a frame 1 outside the recovery cylinder 2. One end of the negative pressure pipe 20 is connected to the vacuum pump 19, and the other end extends into the recovery cylinder 2.

[0038] The dry powder recovery method is as follows: First, start the blowing component 6 to blow at the bend of the recovery pipe 3 to prevent blockage at the bend. Then, start the self-cleaning component to recover large particles of impurities that have not passed through the filter screen 5. Then, start the negative pressure component to suck the dry powder in the fire extinguisher with the cap removed into the recovery cylinder 2 through the recovery pipe 3. After being filtered by the filter screen 5, it is discharged from the powder outlet 4 for recovery.

[0039] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A dry powder recovery device, characterized in that... , including a frame (1), on which are provided: The recycling cylinder (2) is provided with a recycling pipe (3), which is used to connect to the fire extinguisher. The recycling cylinder (2) is provided with a powder outlet (4) that can be opened and closed. Negative pressure assembly, the negative pressure assembly being used to create a negative pressure inside the recovery cylinder (2) to recover the dry powder inside the fire extinguisher; A filter screen (5) is provided inside the recovery cylinder (2) and is used to filter the dry powder returned to the recovery cylinder (2). The self-cleaning component is used to recover large particulate impurities that have not passed through the filter screen (5) on its surface; The blowing assembly (6) is used to blow air at the bends of the recovery pipe (3) to prevent blockage at the bends.

2. The dry powder recovery device according to claim 1, characterized in that, The recycling pipe (3) is L-shaped.

3. The dry powder recovery device according to claim 2, characterized in that, The blowing assembly (6) includes: The blow hole (7) is located at the front of the bend in the recycling pipe (3); The base sleeve (8) is fixedly installed inside the blow hole (7). A bent channel (9) is provided inside the base sleeve (8). The bent channel (9) includes a straight hole (10) and an inclined hole (11). The straight hole (10) is connected to the air pipe, and the inclined hole (11) is inclined toward the bend of the recovery pipe (3). The blow pipe (12) is rotatably disposed in the inclined hole (11) through a connecting structure, and a spiral channel (13) is provided inside the blow pipe (12).

4. The dry powder recovery device according to claim 3, characterized in that, The connection structure includes a limiting screw sleeve (14), which limits the blow pipe (12) within the inclined hole (11).

5. A dry powder recovery device according to claim 4, characterized in that, The limiting screw sleeve (14) has threads on its outer periphery that can be threaded to the inclined hole (11), and the blow pipe (12) is T-shaped and sleeved inside the limiting screw sleeve (14).

6. A dry powder recovery device according to claim 5, characterized in that, There is an angle between the straight hole (10) and the inclined hole (11), and the angle is set to 30 degrees.

7. A dry powder recovery device according to claim 6, characterized in that, The self-cleaning component includes a top cover (15), which is fixedly installed above the recycling cylinder (2). A drive motor (16) is fixedly installed inside the top cover (15). The output shaft of the drive motor (16) passes through the top of the recycling cylinder (2) and enters the recycling cylinder (2) and is fixedly connected to the center of the filter screen (5). The filter screen (5) and the inner wall of the recycling cylinder (2) are provided with a gap for collecting waste.

8. A dry powder recovery device according to claim 7, characterized in that, A receiving plate (17) is provided in the gap between the filter screen (5) and the inner wall of the recycling cylinder (2). The receiving plate (17) is spiral downward, and a waste pipe (18) for recycling waste is provided at the lowest point of the receiving plate (17).

9. A dry powder recovery device according to claim 8, characterized in that, The negative pressure assembly includes a vacuum pump (19) and a negative pressure pipe (20). The vacuum pump (19) is mounted on a frame (1) outside the recovery cylinder (2). One end of the negative pressure pipe (20) is connected to the vacuum pump (19), and the other end extends into the recovery cylinder (2).

10. A method for recycling dry powder using a recycling device, characterized in that, The dry powder recovery device according to claim 8 is first activated by blowing the spray assembly (6) at the bend of the recovery pipe (3) to prevent blockage at the bend. Then, the self-cleaning assembly is activated to recover large particulate impurities that have not passed through the filter screen (5). Then, the negative pressure assembly is activated to suck the dry powder in the fire extinguisher with the cap removed into the recovery cylinder (2) through the recovery pipe (3). After being filtered by the filter screen (5), it is discharged from the powder outlet (4) for recovery.

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