Foam mixing mechanism and dust removal device

Abstract

The embodiment of the utility model provides a foam mixing mechanism and a dust removal device, and relates to the technical field of dust removal device.The foam mixing mechanism comprises a main body, and a mixing channel is formed in the main body; the main body is also provided with an outlet and at least two inlets which are communicated with the mixing channel, at least one inlet is used for introducing a foam stock solution, and at least one inlet is used for introducing a fluid, so that the foam stock solution and the fluid form a foam mixed solution in the mixing channel, and then the foam mixed solution is sprayed out from the outlet. According to the foam mixing mechanism and the dust removal device provided by the embodiment of the invention, the problem of poor water mist dust removal effect in the prior art is solved.

Description

Technical Field

[0001] This application relates to the technical field of dust removal equipment, and more particularly to a foam mixing mechanism and dust removal device. Background Art

[0002] During coal mining, tunnels are typically excavated continuously to extract more coal.

[0003] A large amount of dust is generated during the excavation of coal mine roadways. A common dust removal method is to spray water mist into the air to absorb the dust.

[0004] However, the dust removal effect is poor when using the above methods. Utility Model Content

[0005] This application provides a foam mixing mechanism and a dust removal device to solve the problem of poor water mist dust removal effect in the prior art.

[0006] In a first aspect, embodiments of this application provide a foam mixing mechanism method, including a main body, wherein a mixing channel is provided within the main body;

[0007] The main body is also provided with an outlet and at least two inlets connected to the mixing channel, at least one of the inlets being used to introduce foam concentrate and at least one of the inlets being used to introduce fluid, so that after the foam concentrate and the fluid form a foam mixture in the mixing channel, it is sprayed out from the outlet.

[0008] In one possible implementation, there are two inlets, a main inlet and a secondary inlet, wherein the main inlet is used to introduce the fluid and the secondary inlet is used to introduce the foam concentrate.

[0009] In one possible implementation, a mixing tube is provided inside the main body, and the internal space of the mixing tube is a mixing channel;

[0010] The main inlet connects to the mixing channel from one end of the mixing tube extending in the direction of extension, the outlet connects to the mixing channel from the other end of the mixing tube extending in the direction of extension, and the secondary inlet connects to the mixing channel from the periphery of the mixing tube.

[0011] In one possible implementation, the main body is provided with a first conical cavity, the large end of which is connected to the main inlet;

[0012] The main body is provided with a second conical cavity, and the large end of the second conical cavity is connected to the outlet;

[0013] The small end of the first conical cavity is connected to the small end of the second conical cavity to form the mixing channel.

[0014] In one possible implementation, the main body is provided with a first pipe connecting to the main inlet, and a check valve is provided on the first pipe to restrict the backflow of the foam mixture from the first pipe.

[0015] In one possible implementation, the main body is provided with a second pipe connecting to the secondary inlet, and the second pipe is provided with a throttle valve for controlling the flow rate or flow volume of the foam concentrate.

[0016] In one possible implementation, a damper is provided inside the second fitting, the damper being located on the side of the throttle valve away from the mixing channel.

[0017] In one possible implementation, the main body includes a first block, a second block, and a third block, wherein the second block and the third block are detachably connected to opposite sides of the first block.

[0018] The mixing channel and the secondary inlet are located on the first block, the main inlet is located on the second block, and the outlet is located on the third block.

[0019] In one possible implementation, the first block is provided with a positioning protrusion on the side corresponding to the second block and the side corresponding to the third block, and both the second block and the third block are provided with positioning grooves that cooperate with the positioning protrusions.

[0020] Secondly, embodiments of this application provide a dust removal device, including a nozzle, a foam concentrate tank for holding foam concentrate, a fluid tank for holding fluid, and a foam mixing mechanism as described in any of the above embodiments;

[0021] The foam concentrate tank and the fluid tank are respectively connected to two different inlets in the foam mixing mechanism, and the nozzle is connected to the outlet in the foam mixing mechanism;

[0022] The fluid tank is equipped with an infusion pump for pumping the fluid into the foam mixing mechanism.

[0023] This application provides a foam mixing mechanism and a dust removal device. The foam mixing mechanism includes a main body with a mixing channel inside. The main body also has an outlet and at least two inlets connected to the mixing channel. At least one inlet is used to introduce foam concentrate, and at least one inlet is used to introduce fluid, so that the foam concentrate and fluid form a foam mixture in the mixing channel and are then sprayed out from the outlet. Thus, in use, the foam concentrate and fluid (e.g., clean water or water mixed with other reagents) are connected to the two inlets respectively, so that after the fluid is pumped into the mixing channel, it mixes with the foam concentrate to form a foam mixture (i.e., diluted foam). The foam mixture is then sprayed out from the outlet, thereby wetting and depositing dust in the air through the foam, achieving the purpose of dust suppression. Because foam has a strong diffusion and adhesion effect, the dust removal effect is better, solving the problem of poor water mist dust removal effect in the prior art. Moreover, compared with the dust suppression and dust removal methods in related technologies, the water consumption is greatly reduced. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0025] Figure 1 A cross-sectional structural schematic diagram of a foam mixing mechanism provided in this application;

[0026] Figure 2 for Figure 1 A schematic diagram of the partial structure of the main body;

[0027] Figure 3 for Figure 1 Schematic diagram of the installation structure of the second pipe fitting.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100 - Main body; 110 - First component; 111 - Positioning protrusion; 120 - Second component; 130 - Third component; 131 - Unit block;

[0030] 200-Mixed Channels;

[0031] 300 - Outlet; 310 - Second conical cavity; 320 - Third fitting;

[0032] 400 - Main inlet; 410 - First conical cavity; 420 - First fitting; 430 - Check valve;

[0033] 500 - Secondary inlet; 510 - Secondary fitting; 520 - Throttling valve; 530 - Damper;

[0034] 600-Mixing tube.

[0035] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0036] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0037] In existing technologies, during the coal mining process, it is common practice to continuously excavate within the coal mine roadways in order to extract more coal.

[0038] During the tunneling process in coal mines, a large amount of dust is generated and dispersed in the air. To reduce the environmental impact of dust, common dust control methods include dust suppression and dust removal. Dust suppression mainly involves injecting water into the coal seam to reduce the possibility of dust generation during tunneling. Dust removal mainly involves spraying water mist into the air after dust is generated to reduce the amount of dust in the air.

[0039] However, dust removal using any of the above methods consumes a large amount of water and has poor dust removal effect.

[0040] Therefore, this application provides a foam mixing mechanism and a dust removal device. The foam mixing mechanism consists of a main body with a mixing channel inside. The main body also has an outlet connected to the mixing channel and at least two inlets. At least one inlet is used to introduce foam concentrate, and at least one inlet is used to introduce fluid, so that the foam concentrate and fluid form a mixture in the mixing channel and are then sprayed out from the outlet. In use, the foam concentrate and fluid (e.g., clean water or water mixed with other reagents) are connected to the two inlets respectively. After the fluid is pumped into the mixing channel, it mixes with the foam concentrate to form a foam mixture (i.e., diluted foam). The foam mixture is then sprayed out from the outlet, thereby wetting and depositing dust in the air through the foam, achieving the purpose of dust suppression. Due to the strong diffusion and adhesion effect of foam, the dust removal effect is better, solving the problem of poor water mist dust removal effect in the prior art. Furthermore, compared with the dust suppression and removal methods in related technologies, the water consumption is greatly reduced.

[0041] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0042] like Figure 1 As shown in the figure, a foam mixing mechanism provided in this application embodiment includes a main body 100, and a mixing channel 200 is provided inside the main body 100;

[0043] The main body 100 is also provided with an outlet 300 connected to the mixing channel 200 and at least two inlets, at least one inlet for introducing foam concentrate and at least one inlet for introducing fluid, so that after the foam concentrate and fluid form a foam mixture in the mixing channel 200, it is sprayed out from the outlet 300.

[0044] In practice, a pipe can be used to connect the foam concentrate to the inlet, or a pipe can be used to connect the fluid to the inlet. The fluid can be clean water or water mixed with other reagents (such as water mixed with detergent, deodorizer, etc.).

[0045] It should be noted that the foam concentrate and the fluid are connected to two different inlets to minimize the possibility of interference between the input processes of the foam concentrate and the fluid during use. Furthermore, the fluid can be pumped into the main body 100 by a water pump to ensure it has sufficient pressure for optimal spraying of the subsequent foam mixture.

[0046] In use, the foam concentrate and the fluid are connected to two inlets respectively. After the fluid is pumped into the mixing channel, it mixes with the foam concentrate to form a foam mixture (i.e., diluted foam). The foam mixture is then sprayed out from the outlet 300. The foam mixture wets and deposits dust in the air, achieving the purpose of dust suppression. Due to the strong diffusion and adhesion effect of foam, the dust removal effect is better, solving the problem of poor water mist dust removal effect in the existing technology. Moreover, compared with the dust suppression and dust removal methods in related technologies, the water consumption is greatly reduced.

[0047] Specifically, there are two inlets, namely the main inlet 400 and the secondary inlet 500. The main inlet 400 is used to introduce fluid, and the secondary inlet 500 is used to introduce foam stock solution.

[0048] In use, simply pipe the fluid into the main inlet 400 and the foam concentrate into the secondary inlet 500. In other embodiments, the number of inlets can be set to other numbers, which is not limited.

[0049] like Figure 1 and Figure 2As shown, in some embodiments, a mixing tube 600 is provided inside the main body 100, and the internal space of the mixing tube 600 is a mixing channel 200;

[0050] The main inlet 400 is connected to the mixing channel 200 from one end of the mixing pipe 600 in the direction of extension, the outlet 300 is connected to the mixing channel 200 from the other end of the mixing pipe 600 in the direction of extension, and the secondary inlet 500 is connected to the mixing channel 200 from the periphery of the mixing pipe 600.

[0051] Specifically, the mixing pipe 600 is horizontally positioned within the main body 100, and the internal space of the mixing pipe 600 is a mixing channel 200, which extends horizontally. At this time, the main inlet 400 is connected to one end of the mixing channel 200 in the extending direction, and the outlet 300 is connected to the other end of the mixing channel 200 in the extending direction, so that the main inlet 400, the mixing channel 200, and the outlet 300 are on the same horizontal line. This minimizes energy loss during the process of fluid being pumped from the main inlet 400 into the mixing channel 200 and then output from the outlet 300.

[0052] It should be noted that the secondary inlet 500 connects to the mixing channel 200 from the periphery of the mixing pipe 600, allowing the foam concentrate to enter from the side of the mixing channel 200 and then flow into the fluid from the side in the fluid transport direction, forming a foam mixture within the mixing channel 200, which is finally output from the outlet 300. Furthermore, the foam concentrate does not easily reduce the fluid velocity during its flow into the fluid, ensuring that the foam mixture has a better spraying effect.

[0053] To facilitate the incorporation of the foam concentrate into the fluid, in some embodiments, such as Figure 1 As shown, the main body 100 is provided with a first conical cavity 410, and the large end of the first conical cavity 410 is connected to the main inlet 400;

[0054] The main body 100 is provided with a second conical cavity 310, and the large end of the second conical cavity 310 is connected to the outlet 300;

[0055] The small end of the first conical cavity 410 is connected to the small end of the second conical cavity 310 to form a mixing channel 200.

[0056] In this embodiment, the first conical cavity 410 is located between the mixing tube 600 and the main inlet 400, such that the large end of the first conical cavity 410 is connected to the main inlet 400, and the small end of the first conical cavity 410 is connected to the interior of the mixing tube 600. The second conical cavity 310 is located between the mixing tube 600 and the outlet 300, such that the large end of the second conical cavity 310 is connected to the outlet 300, and the small end of the second conical cavity 310 is connected to the interior of the mixing tube 600. Thus, the first conical cavity 410, the interior of the mixing tube 600, and the second conical cavity 310 are sequentially connected, and together they form the mixing channel 200.

[0057] The secondary inlet 500 connects to the mixing channel 200 from the periphery of the mixing tube 600. In other embodiments, the secondary inlet 500 may also connect to the small end of the first conical cavity 410 or the small end of the second conical cavity 310, without limitation.

[0058] In practice, the fluid enters through the main inlet 400, passes sequentially through the first conical cavity 410, the mixing pipe 600, and the second conical cavity 310, and finally exits through the outlet 300. When the fluid passes through the first conical cavity 410, it is constrained by the cavity, causing the flow velocity to increase as it passes through the mixing pipe 600 and the second conical cavity 310. This reduces the pressure within the mixing pipe 600, creating an adsorption force that attracts the foam concentrate at the secondary inlet 500, causing it to mix with the fluid to form a foam mixture. This foam mixture then diffuses within the second conical cavity 310 and is finally ejected from the outlet 300.

[0059] In other embodiments, the foam concentrate can also be pumped into the mixing channel 200 by an infusion pump to mix the foam concentrate with the fluid.

[0060] like Figure 1 As shown, in some embodiments, the main body 100 is provided with a first pipe 420 communicating with the main inlet 400, and a check valve 430 is provided on the first pipe 420. The check valve 430 is used to restrict the backflow of foam mixture from the first pipe 420.

[0061] It should be noted that the first fitting 420 is connected to other fluid delivery pipes (such as water pipes) to allow fluid to be introduced into the main body 100. The first fitting 420 can be a metal pipe, such as a steel pipe or an iron pipe, or a non-metallic pipe, such as a plastic pipe or a rubber pipe, or of other materials; there are no restrictions on this. Furthermore, the first fitting 420 can be connected to the main body 100 by screwing, welding, plugging, snapping, or other methods; there are no restrictions on this.

[0062] The check valve 430 is installed on the first pipe fitting 420 to restrict the flow direction of the liquid within the first pipe fitting 420. This allows external fluid to enter the main body 100 through the first pipe fitting 420 while restricting the outward flow of liquid within the main body 100 from the first pipe fitting 420, thereby reducing the possibility of backflow of the foam mixture from the first pipe fitting 420. The type of check valve 430 is not limited.

[0063] like Figure 1 and Figure 3 As shown, in some embodiments, the main body 100 is provided with a second pipe fitting 510 that connects to the secondary inlet 500, and a throttle valve 520 is provided on the second pipe fitting 510. The throttle valve 520 is used to control the flow rate or flow rate of the foam concentrate.

[0064] It should be noted that the second fitting 510 is connected to an external pipeline for conveying the foam concentrate, so that the foam concentrate can be introduced into the main body 100. The second fitting 510 can be a metal pipe, such as a steel pipe or an iron pipe, or a non-metallic pipe, such as a plastic pipe or a rubber pipe, or of other materials; there are no restrictions on this. Furthermore, the second fitting 510 can be connected to the main body 100 by screwing, welding, plugging, snapping, or other methods; there are no restrictions on this.

[0065] A throttle valve 520 is installed on the second fitting 510, and the model of the throttle valve 520 is not limited, as long as it can control the flow rate or volume of the foam concentrate flowing through the second fitting 510. This controls the flow rate or volume of the foam concentrate, thereby ensuring the foam mixture has better quality while effectively reducing the possibility of waste of the foam concentrate.

[0066] During implementation, noise is easily generated when the foam concentrate passes through the throttling valve 520. Further measures can be taken to address this, such as... Figure 1 and Figure 3 As shown, a damper 530 is provided inside the second pipe fitting 510, and the damper 530 is located on the side of the throttle valve 520 away from the mixing channel 200.

[0067] The type of damper 530 is not limited, such as a spring damper. In use, the damper 530 reduces the impact force of the foam concentrate on the throttle valve 520, thereby effectively reducing the noise or vibration of the foam concentrate when passing through the throttle valve 520.

[0068] like Figure 1 As shown, in addition, during implementation, a third fitting 320 can be installed at the outlet 300, and the installation method of the third fitting 320 can be the same as that of the first fitting 420 or the second fitting 510, which will not be described in detail. This allows for connection of the nozzle or spray head through the third fitting 320 during use, improving the output effect of the foam mixture, and facilitating control or adjustment of the spray direction of the foam mixture.

[0069] like Figure 1 As shown, in some embodiments, the main body 100 includes a first block 110, a second block 120, and a third block 130. The second block 120 and the third block 130 are detachably connected to opposite sides of the first block 110. The mixing channel 200 and the secondary inlet 500 are disposed on the first block 110, the main inlet 400 is disposed on the second block 120, and the outlet 300 is disposed on the third block 130.

[0070] In this embodiment, the third block 130, the first block 110, and the second block 120 are distributed sequentially in the horizontal direction, such that the first block 110 is located between the second block 120 and the third block 130, and the second block 120 and the third block 130 are detachably connected to the first block 110 by screws, bolts or other means, without limitation.

[0071] It should be noted that the mixing tube 600 extends horizontally and can be embedded in the first block 110 by bonding, interference fit, welding or other means. The secondary inlet 500 is opened at the lower part of the first block 110, such that the upper end of the secondary inlet 500 communicates with the interior of the mixing tube 600 from the side. The lower end of the secondary inlet 500 extends to the bottom of the first block 110.

[0072] The main inlet 400 is horizontally formed on the second block 120. A first conical cavity 410 is formed at the opposite ends of the first block 110 and the second block 120, such that a portion of the first conical cavity 410 is located on the first block 110 and the other portion is located on the second block 120. When the first block 110 and the second block 120 are connected, a complete first conical cavity 410 is formed, and the first conical cavity 410 connects the main inlet 400 to the interior of the mixing pipe 600.

[0073] The outlet 300 is horizontally located on the third block 130. A second conical cavity 310 is formed at the opposing ends of the first block 110 and the third block 130, such that a portion of the second conical cavity 310 is located on the first block 110 and another portion is located on the third block 130. When the first block 110 and the third block 130 are connected, a complete second conical cavity 310 is formed, and the second conical cavity 310 connects the outlet 300 to the interior of the mixing pipe 600.

[0074] Thus, the main body 100 is divided into a first component 110, a second component 120, and a third component 130, making the assembly of the main body 100 more convenient. Furthermore, it facilitates internal inspection and maintenance of the main body 100, and in the event of localized damage, only the damaged component needs to be replaced.

[0075] The third component 130 can also be divided into several interconnected unit blocks 131, depending on actual needs. Each unit block 131 is connected by screws, bolts, or other means. In other embodiments, the second component 120 or the first component 110 can also be divided into several interconnected modules, without limitation.

[0076] like Figure 1As shown, in some embodiments, the first block 110 is provided with a positioning protrusion 111 on the side corresponding to the second block 120 and the side corresponding to the third block 130, and the second block 120 and the third block 130 are provided with positioning grooves that cooperate with the positioning protrusion 111.

[0077] Therefore, when installing the second component 120 or the third component 130, the positioning groove can cooperate with the positioning protrusion 111 to position the second component 120 or the third component 130, and then tighten it, thereby improving the stability of the installation of the second component 120 or the third component 130.

[0078] The shape of the positioning protrusion 111 can be square, prism, irregular, or other shapes, and there are no restrictions on this.

[0079] In summary, the foam mixing mechanism provided in this application embodiment connects the foam concentrate and the fluid to two inlets respectively. After the fluid is pumped into the mixing channel, it mixes with the foam concentrate to form a foam mixture (i.e., diluted foam). The foam mixture is then sprayed out from the outlet 300, thereby wetting and depositing dust in the air to achieve the purpose of dust suppression. Due to the strong diffusion and adhesion effect of foam, the dust removal effect is better, solving the problem of poor water mist dust removal effect in the prior art. Moreover, compared with the dust suppression and dust removal methods in related technologies, the water consumption is greatly reduced.

[0080] This application also provides a dust removal device, including a nozzle, a foam concentrate tank for holding foam concentrate, a fluid tank for holding fluid, and a foam mixing mechanism as described in any of the above embodiments; the foam concentrate tank and the fluid tank are respectively connected to two different inlets in the foam mixing mechanism, and the nozzle is connected to an outlet 300 in the foam mixing mechanism; the fluid tank is provided with an infusion pump for pumping fluid into the foam mixing mechanism.

[0081] The nozzle, foam concentrate tank, and fluid tank are not shown in the diagram. The foam mixing mechanism has been described in detail in the above embodiments and will not be repeated here.

[0082] It should be noted that, during implementation, the foam concentrate tank and the fluid tank can be connected to the secondary inlet 500 and the main inlet 400 of the foam mixing mechanism via pipelines using conventional connection methods. For example, a flexible hose can be used, with both ends connected to the foam concentrate tank and the secondary inlet 500 respectively; or both ends of the flexible hose can be connected to the fluid tank and the main inlet 400 respectively. An infusion pump can be added, connected to the flexible hose inside the fluid tank, to pump the fluid from the fluid tank into the foam mixing mechanism. The infusion pump can be a submersible pump installed inside the fluid tank, or a pipeline pump, reciprocating pump, centrifugal pump, diaphragm pump, etc., installed outside the fluid tank, and the model is not limited.

[0083] The nozzle can be connected to the outlet 300 in the foam mixing mechanism via a hose to control the spray direction of the foam mixture output from the outlet 300.

[0084] In summary, the dust removal device provided in this application, when in use, after the fluid is pumped into the foam mixing mechanism, it mixes with the foam concentrate to form a foam mixture. Subsequently, the foam mixture is sprayed out from the nozzle, thereby wetting and depositing dust in the air to achieve the purpose of dust reduction. Since foam has a strong diffusion and adhesion effect, the dust removal effect is better, solving the problem of poor dust removal effect in the prior art. Moreover, compared with the dust suppression and dust removal methods in related technologies, the water consumption is greatly reduced.

[0085] Finally, it should be noted that other embodiments of this utility model will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A foam mixing mechanism, characterized in that, include: The main body (100) has a mixing channel (200) inside it. The main body (100) is also provided with an outlet (300) connected to the mixing channel (200) and at least two inlets, at least one of the inlets being used to introduce foam concentrate and at least one of the inlets being used to introduce fluid, so that after the foam concentrate and the fluid form a foam mixture in the mixing channel (200), it is sprayed out from the outlet (300).

2. The foam mixing mechanism according to claim 1, characterized in that, The inlet is provided in two parts, namely a main inlet (400) and a secondary inlet (500). The main inlet (400) is used to introduce the fluid, and the secondary inlet (500) is used to introduce the foam stock solution.

3. The foam mixing mechanism according to claim 2, characterized in that, The main body (100) is provided with a mixing tube (600), and the internal space of the mixing tube (600) is a mixing channel (200). The main inlet (400) is connected to the mixing channel (200) from one end of the mixing pipe (600) extending in the direction of extension, the outlet (300) is connected to the mixing channel (200) from the other end of the mixing pipe (600) extending in the direction of extension, and the secondary inlet (500) is connected to the mixing channel (200) from the periphery of the mixing pipe (600).

4. The foam mixing mechanism according to claim 2, characterized in that, The main body (100) is provided with a first conical cavity (410), and the large end of the first conical cavity (410) is connected to the main inlet (400); The main body (100) is provided with a second conical cavity (310), and the large end of the second conical cavity (310) is connected to the outlet (300); The small end of the first conical cavity (410) is connected to the small end of the second conical cavity (310) to form the mixing channel (200).

5. The foam mixing mechanism according to claim 2, characterized in that, The main body (100) is provided with a first pipe (420) that connects to the main inlet (400), and a check valve (430) is provided on the first pipe (420) to restrict the foam mixture from flowing back from the first pipe (420).

6. The foam mixing mechanism according to claim 2, characterized in that, The main body (100) is provided with a second pipe (510) that connects to the secondary inlet (500), and a throttle valve (520) is provided on the second pipe (510) for controlling the flow rate or flow of the foam concentrate.

7. The foam mixing mechanism according to claim 6, characterized in that, The second fitting (510) is provided with a damper (530), which is located on the side of the throttle valve (520) away from the mixing channel (200).

8. The foam mixing mechanism according to any one of claims 2-7, characterized in that, The main body (100) includes a first block (110), a second block (120) and a third block (130), wherein the second block (120) and the third block (130) are detachably connected to opposite sides of the first block (110); The mixing channel (200) and the secondary inlet (500) are disposed on the first block (110), the main inlet (400) is disposed on the second block (120), and the outlet (300) is disposed on the third block (130).

9. The foam mixing mechanism according to claim 8, characterized in that, The first block (110) is provided with a positioning protrusion (111) on the side corresponding to the second block (120) and the side corresponding to the third block (130). The second block (120) and the third block (130) are provided with positioning grooves that cooperate with the positioning protrusion (111).

10. A dust removal device, characterized in that, It includes a nozzle, a foam concentrate tank for holding foam concentrate, a fluid tank for holding fluid, and a foam mixing mechanism as described in any one of claims 1-9; The foam concentrate tank and the fluid tank are respectively connected to two different inlets in the foam mixing mechanism, and the nozzle is connected to the outlet (300) in the foam mixing mechanism. The fluid tank is equipped with an infusion pump for pumping the fluid into the foam mixing mechanism.

Images