Filtering device for the production of foam extinguishing agents

Abstract

This utility model belongs to the technical field of filtration devices, and particularly relates to a filtration device for the production of foam fire extinguishing agents. It includes: a housing, within which a filtration chamber is provided. Through at least one set of filtration structures configured within the filtration chamber, raw materials or intermediate products for foam fire extinguishing agent production can be effectively filtered to remove impurities. The cooperation of a horizontal drive component, a limiting support component, and a snap-fit ​​limiting component allows a cleaning support plate to move horizontally, driving a first cleaning component and a second cleaning component to simultaneously clean both sides of the filtration structure, improving cleaning efficiency and increasing production efficiency. The snap-fit ​​limiting component includes a fixed snap-fit ​​part and a movable snap-fit ​​part, which, in conjunction with a spacing adjustment component, can adjust their distance to accommodate different specifications of filtration structures. A closed cover plate on the top of the housing ensures the sealing of the filtration chamber, reducing the entry of external impurities or the volatilization of internal materials, and ensuring the stability of the filtration process.

Description

Technical Field

[0001] This utility model belongs to the technical field of filtration devices, and in particular relates to a filtration device for the production of foam fire extinguishing agents. Background Technology

[0002] In the production process of foam fire extinguishing agents, the purity of raw materials and the degree of purification of intermediate products directly determine the fire extinguishing performance, stability, and shelf life of the final product. Therefore, filtration is an indispensable and critical step in the production process of foam fire extinguishing agents. The core function of the filtration device is to remove solid impurities, particulate contaminants, and undissolved raw material clumps mixed in with raw materials or intermediate products, preventing these impurities from affecting the foaming ratio, stability, and spray performance of the fire extinguishing agent. At the same time, it prevents subsequent production equipment (such as delivery pumps and atomizing nozzles) from becoming clogged or damaged, ensuring the smooth operation of the production process.

[0003] In existing technologies, the raw materials and intermediate products of foam fire extinguishing agents are mostly sticky. During the filtration process, impurities are easily attached to the surface of the filter screen, or even embedded in the mesh to form blockages. During cleaning operations, the machine needs to be stopped and the device needs to be manually disassembled for manual wiping or rinsing. Manual cleaning is not only labor-intensive and time-consuming, but also reduces overall production efficiency and increases production time costs. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned technical problems by providing a filtration device for the production of foam fire extinguishing agents.

[0005] A filtration device for producing foam fire extinguishing agents includes: a housing, wherein a filter chamber is provided inside the housing, and at least one set of filter structures is configured inside the filter chamber; The top of the housing is equipped with a horizontal drive assembly, and the power output end of the horizontal drive assembly is connected to a limiting support member. The limiting support member is provided with at least one set of snap-fit ​​limiting components adapted to the filter structure. The snap-fit ​​limiting component includes a fixed snap-fit ​​part fixed to the limiting support member and a movable snap-fit ​​part slidably assembled to the limiting support member, and a spacing adjustment component is connected between the fixed snap-fit ​​part and the movable snap-fit ​​part. Both the fixed snap-fit ​​part and the movable snap-fit ​​part are provided with a cleaning support plate below them. The two cleaning support plates are respectively provided with a first cleaning component and a second cleaning component on the side facing the filter structure. The horizontal drive component can drive the limiting support component to move horizontally, and simultaneously drive the cleaning support plate to move, so as to drive the first cleaning component and the second cleaning component to clean the filter structure. The top of the box is equipped with a closed cover, and the two sides of the box are respectively equipped with a feed pipe and a discharge pipe.

[0006] Furthermore, the filter structure includes a frame support member assembled in the filter cavity and a filter screen fixed inside the frame support member, wherein the frame support member is located between the limiting bearing member and the movable snap-fit ​​part.

[0007] Furthermore, the horizontal drive assembly includes a guide groove disposed on the top of the housing, a transmission screw rotatably mounted in the guide groove, a slider threadedly connected to the outside of the transmission screw, the slider being fixedly connected to a limiting bearing, and a rotary motor disposed at one end of the housing, the drive end of the rotary motor being connected to the transmission screw.

[0008] Furthermore, there are two guide grooves, and the two guide grooves are respectively located on both sides of the top of the box. The top of the slider is provided with at least one connecting slot, and the bottom of the limiting bearing is provided with connecting protrusions that correspond to and are adapted to the connecting slots. The connecting protrusions are engaged with the connecting slots.

[0009] Furthermore, the first cleaning component is a cleaning cotton, and the second cleaning component is a cleaning brush bristle, both of which are fitted to the filter surface of the filter structure.

[0010] Furthermore, the cleaning support plate for the cleaning brush bristles is provided with multiple spray holes spaced along its length. The limiting support member has a guide channel inside that communicates with the spray holes. One end of the limiting support member is connected to an inlet pipe that communicates with the guide channel. The inlet pipe is used to connect to the cleaning medium.

[0011] Furthermore, the bottom of the filter chamber is provided with multiple drain holes spaced apart along its length, and a liquid collection chamber is provided inside one side of the box. The multiple drain holes are all connected to the liquid collection chamber. A sealing shield is slidably mounted on the top of the liquid collection chamber. The sealing shield has a connecting hole that corresponds to each drain hole. The sealing shield can be slidably aligned or misaligned with the drain hole to open or close the drain hole.

[0012] Furthermore, the bottom of the liquid collection chamber is provided with two guide grooves, and the bottom of the sealing shield is provided with two guide plates. The two guide plates are slidably disposed in the corresponding guide grooves. A screw is rotatably disposed in one of the guide grooves, and the screw moves through the corresponding guide plate and is threadedly connected to the corresponding guide plate.

[0013] Furthermore, the spacing adjustment assembly includes an adjustment screw, which sequentially moves through the fixed locking part and the movable locking part, and the adjustment screw is threadedly engaged with the movable locking part.

[0014] Furthermore, the closed cover is detachably connected to the housing via a locking assembly, the locking assembly including several bolts, all of which movably pass through the closed cover and are threadedly connected to the housing.

[0015] Compared with existing technologies, the filtration device for producing foam fire extinguishing agents of this invention has the following advantages: The filter chamber within the housing, equipped with at least one set of filter structures, effectively filters raw materials or intermediate products for foam extinguishing agent production, removing impurities. The cooperation of the horizontal drive assembly, limiting support component, and snap-fit ​​limiting assembly allows the cleaning support plate to move horizontally, driving the first and second cleaning components to simultaneously clean both sides of the filter structure, improving cleaning efficiency and increasing production efficiency. The snap-fit ​​limiting assembly features fixed and movable snap-fit ​​parts, which, in conjunction with the spacing adjustment component, can adjust their distance to accommodate different filter structures. The closed cover at the top of the housing ensures the filter chamber's airtightness, reducing the entry of external impurities or the volatilization of internal materials, ensuring the stability of the filtration process. Feed and discharge pipelines are respectively installed on both sides, ensuring smooth material transport and preventing leakage or transport stagnation, thus improving production continuity. Attached Figure Description

[0016] Figure 1 This is an overall schematic diagram of the present invention; Figure 2 This is a schematic diagram of the top of the box body of this utility model; Figure 3 This is a schematic diagram of the interior of the filter chamber of this utility model; Figure 4 This is a schematic diagram of the liquid collection chamber of this utility model; Figure 5 This is a schematic diagram of the limiting and bearing component of this utility model; Figure 6 This is a schematic diagram of the flow guiding channel of this utility model; Figure 7 This is a schematic diagram of the sealing and shielding component of this utility model; The markings in the diagram are as follows: 1. Housing; 2. Filter chamber; 3. Filter structure; 4. Limiting support component; 5. Fixed snap-fit ​​part; 6. Movable snap-fit ​​part; 7. Cleaning support plate; 8. First cleaning component; 9. Second cleaning component; 10. Sealing cover plate; 11. Feed pipe; 12. Discharge pipe; 13. Frame support component; 14. Filter screen; 15. Guide slide; 16. Transmission screw; 17. Rotary motor; 18. Slider; 19. Connecting slot; 20. Connecting protrusion; 21. Spray hole; 22. Flow guide channel; 23. Liquid inlet pipe; 24. Liquid outlet; 25. Liquid collection chamber; 26. Sealing shield; 27. Connecting hole; 28. Guide groove; 29. ​​Guide plate; 30. Screw; 31. Adjusting screw; 32. Bolt. Detailed Implementation

[0017] 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.

[0018] It should be noted that all directional and positional terms used in this utility model, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connection arrangements between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0019] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0021] Reference Figures 1-7 A filtration device for producing foam fire extinguishing agent includes: a housing 1, wherein a filter chamber 2 is provided inside the housing 1, and at least one set of filter structures 3 is configured inside the filter chamber 2. The top of the housing 1 is equipped with a horizontal drive assembly, and the power output end of the horizontal drive assembly is connected to a limiting support 4. The limiting support 4 is provided with multiple sets of snap-fit ​​limiting assemblies adapted to the filter structure 3. The snap-fit ​​limiting component includes a fixed snap-fit ​​part 5 fixed to the limiting support member 4 and a movable snap-fit ​​part 6 slidably assembled to the limiting support member 4. A spacing adjustment component is connected between the fixed snap-fit ​​part 5 and the movable snap-fit ​​part 6. Both the fixed snap-fit ​​part 5 and the movable snap-fit ​​part 6 are provided with a cleaning support plate 7 below them. The two cleaning support plates 7 are respectively provided with a first cleaning component 8 and a second cleaning component 9 on the side facing the filter structure 3. The horizontal drive component can drive the limiting support component 4 to move horizontally, and simultaneously drive the cleaning support plate 7 to move, so as to drive the first cleaning component 8 and the second cleaning component 9 to clean the filter structure 3. The top of the box 1 is provided with a closed cover plate 10, and the two sides of the box 1 are respectively provided with a feed pipe 11 and a discharge pipe 12.

[0022] When in use, this device effectively filters the raw materials or intermediate products of foam extinguishing agent production through the filter structure 3 configured in the filter chamber 2 inside the housing 1, removing impurities. The cooperation of the horizontal drive component, the limiting support component 4, and the snap-fit ​​limiting component allows the cleaning support plate 7 to move horizontally, driving the first cleaning component 8 and the second cleaning component 9 to clean both sides of the filter structure 3 simultaneously, improving cleaning efficiency and increasing production efficiency. The fixed snap-fit ​​part 5 and the movable snap-fit ​​part 6 in the snap-fit ​​limiting component, together with the spacing adjustment component, can adjust the distance between them to adapt to different specifications of filter structures 3. The closed cover plate 10 on the top of the housing 1 can ensure the sealing of the filter chamber 2, reducing the entry of external impurities or the volatilization of internal materials, and ensuring the stability of the filtration process. The feed pipe 11 and the discharge pipe 12 are respectively set on both sides to ensure smooth material conveying flow, avoid leakage or conveying stagnation problems, and improve production continuity.

[0023] In the example of this application, the filter structure 3 includes a frame support 13 assembled in the filter cavity 2 and a filter screen 14 fixed inside the frame support 13. The frame support 13 is located between the limiting bearing 4 and the movable snap-fit ​​part 6, and the filter pore diameters of the three filter screens 14 are arranged in descending order.

[0024] As a preferred example of this utility model, the frame support 13 prevents the filter screen 14 from deforming or shifting during material impact or cleaning, ensuring a stable filtration area. The frame support 13 is located between the limiting bearing 4 and the movable snap-fit ​​part 6, so that the first cleaning part 8 and the second cleaning part 9 can be aligned with the filtration surface of the filter screen 14, avoiding cleaning dead corners due to positional deviation and improving the cleaning effect.

[0025] In the example of this application, the horizontal drive assembly includes a guide groove 15 disposed on the top of the housing 1, a transmission screw 16 is rotatably mounted in the guide groove 15, a slider 18 is threadedly connected to the outside of the transmission screw 16, the slider 18 is fixedly connected to the limiting bearing 4, and a rotary motor 17 is provided at one end of the housing 1, the drive end of the rotary motor 17 is connected to the transmission screw 16.

[0026] As a preferred example of this utility model, the threaded engagement between the transmission screw 16 and the slider 18, combined with the guiding effect of the guide groove 15, enables the rotary motor 17 to drive the transmission screw 16 to rotate, thereby driving the limiting bearing 4 to move horizontally, achieving uniform and directional cleaning of the filter structure 3 by the cleaning component.

[0027] In the example of this application, there are two guide grooves 15, and the two guide grooves 15 are respectively located on both sides of the top of the box body 1. The top of the slider 18 is provided with at least one connecting slot 19, and the bottom of the limiting bearing 4 is provided with connecting protrusions 20 that correspond to and are adapted to the connecting slots 19. The connecting protrusions 20 are engaged with the connecting slots 19.

[0028] As a preferred example of this utility model, two guide grooves 15 are respectively set on the top sides of the housing 1, so that the slider 18 forms symmetrical support for the limiting bearing 4, avoiding tilting or shaking of the limiting bearing 4 during movement, and improving the cleaning effect; the snap-fit ​​cooperation between the connecting protrusion 20 and the connecting slot 19 enables quick disassembly and assembly between the limiting bearing 4 and the slider 18, which facilitates the replacement of easily worn parts such as the cleaning bearing plate 7 and the cleaning parts, and improves production efficiency.

[0029] In the example of this application, the first cleaning component 8 is a cleaning cotton, and the second cleaning component 9 is a cleaning brush. Both the cleaning cotton and the cleaning brush are fitted to the filter surface of the filter structure 3.

[0030] As a preferred example of this utility model, the cleaning cotton has good adsorption capacity and can effectively adsorb the fine impurities and sticky substances attached to the filter screen 14; the cleaning brush bristles have moderate hardness and can penetrate deep into the mesh of the filter screen 14 to remove the impurities embedded therein. The two work together to achieve dual cleaning of the filter surface and avoid the problem of reduced filtration efficiency caused by impurities clogging the mesh.

[0031] In the example of this application, the cleaning support plate 7 for cleaning the brush bristles is provided with a plurality of spray holes 21 spaced along the length direction. The limiting support member 4 has a guide channel 22 that communicates with the spray holes 21. One end of the limiting support member 4 is connected to an inlet pipe 23 that communicates with the guide channel 22. The inlet pipe 23 is used to connect the cleaning medium.

[0032] As a preferred example of this utility model, the cleaning medium sprayed from the spray hole 21 can wet and rinse the filter surface, loosening the attached impurities and making it easier for the cleaning brush to remove them. At the same time, the cleaning medium can wash away the cleaned impurities in time, preventing them from adhering to the filter screen 14 again, thus improving cleaning efficiency and effect. The design of the flow channel 22 connecting with the spray hole 21 and the liquid inlet pipe 23 allows the cleaning medium to enter the limiting support member 4 through the liquid inlet pipe 23 and be distributed to each spray hole 21 through the flow channel 22, so as to achieve uniform spraying of the filter surface. By using the cleaning medium (such as clean water), it is suitable for the filtration and cleaning work in the production process of various foam fire extinguishing agents. The liquid inlet pipe 23 movably passes through the closed cover plate 10 and the flow channel 22, and the liquid inlet pipe 23 is a corrugated pipe.

[0033] In the example of this application, the bottom of the filter chamber 2 is provided with a plurality of drain holes 24 spaced apart along the length direction. The inside of one side of the box body 1 is provided with a liquid collection chamber 25. The plurality of drain holes 24 are all connected to the liquid collection chamber 25. A sealing shield 26 is slidably fitted on the top of the liquid collection chamber 25. The sealing shield 26 achieves sealing with the drain holes 24 through the rubber sealing gasket on the top. The sealing shield 26 is provided with a connecting hole 27 corresponding to the drain holes 24 one by one. The sealing shield 26 can be slid to align or misalign the connecting hole 27 with the drain hole 24, so as to open or close the drain hole 24.

[0034] As a preferred example of this utility model, multiple drain holes 24 at the bottom of the filter chamber 2 can guide the waste liquid generated during the cleaning process into the collection chamber 25, preventing the waste liquid from accumulating in the filter chamber 2; by sliding the sealing shield 26, the connecting hole 27 and the drain hole 24 can be aligned or misaligned, thereby controlling the opening or closing of the drain hole 24. During the filtration process, the drain hole 24 is closed to ensure the sealing of the filter chamber 2; the collection chamber 25 is connected to the sewer through an external pipeline to directly discharge the waste liquid.

[0035] In the example of this application, the bottom of the liquid collection chamber is provided with two guide grooves 28, the bottom of the sealing shield 26 is provided with two guide plates 29, and the two guide plates 29 are slidably disposed in the corresponding guide grooves 28. A screw 30 is rotatably disposed in one of the guide grooves 28, and the screw 30 moves through the corresponding guide plate 29 and is threadedly connected to the corresponding guide plate 29.

[0036] As a preferred example of this utility model, the cooperation between the guide plate 29 and the guide groove 28 provides guidance for the sliding of the sealing shield 26, preventing it from shifting during movement and ensuring that the connecting hole 27 and the drain hole 24 can be accurately aligned or misaligned; rotating the screw 30 drives the guide plate 29 to move along the guide groove 28, improving the reliability of opening or closing the drain hole 24; by rotating the screw 30, the guide plate 29 can be moved along the guide groove 28, driving the sealing shield 26 to slide, and at the same time, the threaded drive has self-locking properties, so the sealing shield 26 can be stably stopped at any position.

[0037] In the example of this application, the spacing adjustment assembly includes an adjustment screw 31, which sequentially passes through the fixed locking part 5 and the movable locking part 6, and the adjustment screw 31 is threadedly engaged with the movable locking part 6.

[0038] As a preferred example of this utility model, the screw 31 is threadedly engaged with the movable locking part 6. By rotating the screw 31, the movable locking part 6 can be moved relative to the fixed locking part 5, thereby adjusting the distance between the movable locking part 6 and the fixed locking part 5. This can accommodate filter structures 3 of different thicknesses. The threaded drive has good self-locking performance. After adjustment, the distance between the fixed locking part 5 and the movable locking part 6 can be stably maintained, ensuring the fixing effect of the locking and limiting component on the filter structure 3, while also ensuring the fit between the cleaning part and the filter surface.

[0039] In the example of this application, the closing cover 10 is detachably connected to the housing 1 via a locking assembly. The locking assembly includes a plurality of bolts 32, all of which movably pass through the closing cover 10 and are threadedly connected to the housing 1.

[0040] As a preferred example of this utility model, the bolt 32 screws the sealing cover 10 to the housing 1, which can realize the connection between the sealing cover 10 and the housing 1 and ensure the sealing of the filter chamber 2; the sealing cover 10 can be quickly opened by removing the bolt 32, which is convenient for the inspection, maintenance and replacement of the filter structure 3, cleaning components and other components in the filter chamber 2.

[0041] 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 filtration device for producing foam fire extinguishing agents, characterized in that, include: The housing (1) is provided with a filter chamber (2) and at least one filter structure (3) is provided in the filter chamber (2). The top of the housing (1) is equipped with a horizontal drive assembly, and the power output end of the horizontal drive assembly is connected to a limiting support (4). The limiting support (4) is provided with at least one set of snap-fit ​​limiting assemblies adapted to the filter structure (3). The snap-fit ​​limiting component includes a fixed snap-fit ​​part (5) fixed to the limiting support member (4) and a movable snap-fit ​​part (6) slidably assembled on the limiting support member (4). A gap adjustment component is connected between the fixed snap-fit ​​part (5) and the movable snap-fit ​​part (6). Both the fixed snap-fit ​​part (5) and the movable snap-fit ​​part (6) are provided with cleaning support plates (7) below them. The two cleaning support plates (7) are respectively provided with a first cleaning component (8) and a second cleaning component (9) on the side facing the filter structure (3). The horizontal drive component can drive the limiting support component (4) to move horizontally, and simultaneously drive the cleaning support plate (7) to move, so as to drive the first cleaning component (8) and the second cleaning component (9) to clean the filter structure (3). The top of the box (1) is provided with a closed cover plate (10), and the two sides of the box (1) are respectively provided with a feed pipe (11) and a discharge pipe (12).

2. The filtration device for producing foam fire extinguishing agent according to claim 1, characterized in that, The filter structure (3) includes a frame support (13) assembled in the filter cavity (2) and a filter screen (14) fixed inside the frame support (13). The frame support (13) is located between the limiting bearing (4) and the movable snap-fit ​​part (6).

3. The filtration device for producing foam fire extinguishing agent according to claim 1, characterized in that, The horizontal drive assembly includes a guide groove (15) set on the top of the housing (1), a transmission screw (16) is rotatably mounted in the guide groove (15), a slider (18) is threadedly connected to the outside of the transmission screw (16), the slider (18) is fixedly connected to the limiting bearing (4), and a rotary motor (17) is provided at one end of the housing (1), the drive end of the rotary motor (17) is connected to the transmission screw (16).

4. A filtration device for producing foam fire extinguishing agent according to claim 3, characterized in that, Two guide grooves (15) are provided, and the two guide grooves (15) are located on the two sides of the top of the box body respectively. At least one connecting slot (19) is provided on the top of the slider (18). The bottom of the limiting bearing (4) is provided with connecting protrusions (20) that correspond to and are adapted to the connecting slots (19). The connecting protrusions (20) are engaged with the connecting slots (19).

5. A filtration device for producing foam fire extinguishing agent according to claim 1, characterized in that, The first cleaning component (8) is a cleaning cotton, and the second cleaning component (9) is a cleaning brush. Both the cleaning cotton and the cleaning brush are fitted to the filter surface of the filter structure (3).

6. A filtration device for producing foam fire extinguishing agent according to claim 5, characterized in that, The cleaning support plate (7) for cleaning brush bristles is provided with multiple spray holes (21) spaced along the length direction. The limiting support member (4) has a guide channel (22) inside that communicates with the spray holes (21). One end of the limiting support member (4) is connected to an inlet pipe (23) that communicates with the guide channel (22). The inlet pipe (23) is used to connect to the cleaning medium.

7. A filtration device for producing foam fire extinguishing agent according to claim 1, characterized in that, The bottom of the filter chamber (2) is provided with a plurality of drain holes (24) spaced apart along the length direction. The inside of one side of the box (1) is provided with a liquid collection chamber (25). The plurality of drain holes (24) are all connected to the liquid collection chamber (25). A sealing shield (26) is slidably fitted on the top of the liquid collection chamber (25). The sealing shield (26) is provided with a connecting hole (27) corresponding to the drain hole (24). The sealing shield (26) can be slid to make the connecting hole (27) aligned or misaligned with the drain hole (24), thereby opening or closing the drain hole (24).

8. A filtration device for producing foam fire extinguishing agent according to claim 7, characterized in that, The bottom of the liquid collection chamber is provided with two guide grooves (28), and the bottom of the sealing shield (26) is provided with two guide plates (29). The two guide plates (29) are slidably disposed in the corresponding guide grooves (28). A screw (30) is rotatably disposed in one of the guide grooves (28), and the screw (30) moves through the corresponding guide plate (29) and is threadedly connected to the corresponding guide plate (29).

9. A filtration device for producing foam fire extinguishing agent according to claim 1, characterized in that, The spacing adjustment assembly includes an adjustment screw (31), which sequentially passes through the fixed snap-fit ​​part (5) and the movable snap-fit ​​part (6), and the adjustment screw (31) and the movable snap-fit ​​part (6) are threadedly engaged.

10. A filtration device for producing foam fire extinguishing agent according to claim 1, characterized in that, The closed cover (10) is detachably connected to the box body (1) by a locking assembly. The locking assembly includes several bolts (32), and the bolts (32) are threaded through the closed cover (10) and the box body (1).

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