Fire-fighting foam liquid mixer self-adaptive to flow change
By adopting a sliding casing structure in the fire foam liquid mixer and adjusting the inlet volume of the foam liquid by using the fire water supply pressure, the problem of unstable mixing ratio caused by changes in the fire water flow in the prior art is solved, and a more stable fire extinguishing effect is achieved.
Patent Information
- Application Number
- CN202421885374.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-05
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-05
AI Technical Summary
When the fire water flow rate changes, the existing fire foam liquid mixer cannot effectively maintain the mixing ratio of foam liquid and fire water, affecting the fire extinguishing effect.
A fire-fighting foam liquid mixer adaptive flow changes is designed, adopting a sliding sleeve structure, which acts on the push plate through the fire-fighting water supply pressure, which drives the inner sleeve to slide, so that the foam liquid inlet and the outlet part overlap, realizing the dynamic mixing ratio adjustment of the foam liquid and fire water.
By dynamically adjusting the inlet volume of foam liquid, ensure that the mixing ratio of foam liquid and fire water remains within a certain range, and improve the fire extinguishing effect and system stability.
Smart Images
Figure CN222942857U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of foam liquid mixers, and in particular to a fire-fighting foam liquid mixer with adaptive flow rate variation. Background Art
[0002] Fire foam liquid is a special fire extinguishing agent, which is mainly used to produce foam after mixing with water to cover the surface of flammable liquid, isolate the air, and achieve the purpose of extinguishing fire. The fire foam liquid mixer is an important component in the fire extinguishing system. It can mix fire water and foam liquid in a certain proportion to form a foam mixture with fire extinguishing efficiency. The mixing ratio of the foam mixture has a certain range of requirements. Different scenarios and needs require different mixing ratios of the foam mixture.
[0003] In the related art, most fire-fighting foam liquid mixers include a mixer body, with two ends of the mixer body respectively set as a water inlet and a water outlet, and a flow channel for the circulation of fire water formed inside the mixer body; an injection pipe connected to the foam pump is arranged inside the mixer body, and the outlet of the injection pipe is located at the outlet of the mixer body. When the foam liquid flows out from the outlet of the injection pipe, it mixes with the fire water in the water outlet of the mixer body to form a foam mixed liquid.
[0004] In actual use, it is found that since the foam pump has a rated power, the amount of foam liquid discharged per unit time is a fixed value; while the fire water supply pressure will fluctuate, the flow rate of fire water per unit time will also change accordingly. When the fire water flow rate changes, the mixing ratio of the foam mixture will also change, which will have a certain impact on the actual fire fighting effect. Utility Model Content
[0005] In order to ensure that the mixing ratio of fire water and foam liquid is maintained within a certain ratio range, the present application provides a fire foam liquid mixer with adaptive flow rate changes.
[0006] The fire foam liquid mixer with adaptive flow change provided in the present application adopts the following technical solution:
[0007] A fire-fighting foam liquid mixer with adaptive flow rate change, comprising a fire-fighting water pipe, an injection pipe and a sliding sleeve, wherein the sliding sleeve is located in the fire-fighting water pipe, the sliding sleeve comprises an outer sleeve and an inner sleeve, the inner sleeve is slidably installed in the outer sleeve, and the outer wall of the inner sleeve abuts against the inner wall of the outer sleeve; a foam liquid inlet is provided on the side wall of the inner sleeve, and an outflow port is provided on the side wall of the outer sleeve; the injection pipe extends into the fire-fighting water pipe, one end of the injection pipe is connected to a foam pump, and the other end of the injection pipe is connected to the outflow port; a push plate is fixed to one end of the inner sleeve close to the water inlet of the fire-fighting water pipe, and an elastic member is provided between the push plate and the outer sleeve;
[0008] In a static state, the foam liquid inlet and the outflow port do not overlap; when the fire water in the fire water pipe acts on the push plate, the push plate overcomes the elastic force of the elastic member and drives the inner sleeve to slide toward the fire water pipe outlet, so that the foam liquid inlet and the outflow port partially overlap.
[0009] By adopting the above technical solution, when the fire water is introduced, the fire water supply pressure acts on the push plate, and the push plate drives the inner sleeve to slide toward the fire water pipe outlet, and the elastic member is compressed, so that the foam liquid inlet and the outflow port partially overlap, and the foam liquid flows into the inner sleeve through the foam liquid inlet and is discharged from the inner sleeve, and the foam liquid is mixed with the fire water in the fire water pipe to form a foam mixed liquid with fire extinguishing efficiency. As the fire water supply pressure increases, the sliding distance of the inner sleeve increases, the overlapping area of the foam liquid inlet and the outflow port also gradually increases, and the amount of foam liquid inflow increases; if the fire water supply pressure is unstable and the pressure in the fire water pipe decreases, at this time, under the action of the elastic member, the inner sleeve will move toward the fire water pipe inlet, so that the overlapping area between the foam liquid inlet and the outflow port is reduced, and then the amount of foam liquid inflow is reduced, so as to achieve a dynamic balance between the foam liquid inflow and the fire water flow rate, so that the mixing ratio of the foam liquid and the fire water is maintained within a certain ratio range. When the fire water supply pressure stops, the elastic member recovers its deformation, and the push plate and the inner sleeve are reset.
[0010] Optionally, the foam liquid inlet is in the shape of an isosceles triangle, and the vertex of the isosceles triangle is arranged toward one side of the fire water pipe outlet.
[0011] By adopting the above technical solution, the shape of the isosceles triangle can more accurately control the amount of foam liquid entering, thereby more accurately controlling the discharge rate of the foam liquid, so that the mixing ratio of fire water and foam liquid is maintained within a certain ratio range.
[0012] Optionally, a plurality of foam liquid inlets are provided, and the plurality of foam liquid inlets are evenly distributed on the side wall of the inner sleeve along the circumferential direction, and the top angles of the plurality of foam liquid inlets are different.
[0013] By adopting the above technical solution, foam liquid inlets of different sizes provide multiple mixing ratio options, and a suitable foam liquid inlet can be flexibly selected according to actual needs.
[0014] Optionally, the sliding sleeve is further provided with a fixing groove and a fixing piece, wherein the fixing groove is opened on the side wall of the inner sleeve, the fixing piece is installed on the outer sleeve, one end of the fixing piece extends into the fixing groove, and the fixing piece slides in the fixing groove synchronously with the sliding of the inner sleeve.
[0015] By adopting the above technical solution, one end of the fixing piece extends into the fixing groove, and the fixing piece slides in the fixing groove synchronously with the sliding of the inner sleeve, which can limit the circumference of the inner sleeve and prevent the inner sleeve from rotating in the outer sleeve during use.
[0016] Optionally, the number of the fixed grooves is equal to the number of the foam liquid inlets, and the fixed grooves correspond to the foam liquid inlets one by one.
[0017] By adopting the above technical solution, the fixed grooves correspond to the foam liquid inlets one by one, so that when different foam liquid inlets are used to discharge the foam liquid, the corresponding fixed grooves can be used to limit the inner sleeve.
[0018] Optionally, the elastic member is configured as a compression spring, the compression spring is sleeved on the inner sleeve, and two ends of the compression spring are respectively abutted against the end of the push plate and the outer sleeve.
[0019] By adopting the above technical scheme, when the fire water supply pressure increases, the push plate will drive the inner sleeve to slide toward the fire water pipe outlet, and the compression spring is compressed at this time; when the fire water supply pressure decreases, under the action of the compression spring, the push plate drives the inner sleeve to move toward the fire water pipe inlet, and the overlapping area between the foam liquid inlet and the outflow port is reduced, thereby reducing the amount of foam liquid inlet, so as to achieve a dynamic balance between the foam liquid inlet and the fire water flow rate, so that the mixing ratio of the foam liquid and the fire water is maintained within a certain ratio range.
[0020] Optionally, a first limiting groove is circumferentially formed at one end of the push plate close to the outer sleeve, and a second limiting groove is circumferentially formed at one end of the outer sleeve close to the push plate, and both ends of the elastic member abut against the first limiting groove and the second limiting groove respectively.
[0021] By adopting the above technical solution, the elastic member is fixed in the first limiting groove and the second limiting groove, so that the connection between the elastic member, the push plate and the outer sleeve can be achieved, thereby improving the stability and convenience of the installation of the elastic member.
[0022] Optionally, flanges are provided on the circumferential sides of both ends of the fire water pipe.
[0023] By adopting the above technical solution, the flange can realize the connection between the fire foam liquid mixer and the fire fighting equipment.
[0024] In summary, the present application includes at least one of the following beneficial technical effects:
[0025] 1. When the fire water is introduced, the fire water supply pressure acts on the push plate, which drives the inner sleeve to slide toward the fire water pipe outlet. The elastic member is compressed, so that the foam liquid inlet and the outlet are partially overlapped. The foam liquid flows into the inner sleeve through the foam liquid inlet and mixes with the fire water in the fire water pipe to form a foam mixed liquid with fire extinguishing efficiency.
[0026] As the fire water supply pressure increases, the sliding distance of the inner sleeve increases, the overlapping area between the foam liquid inlet and the outflow port gradually increases, and the amount of foam liquid flowing in increases; if the fire water supply pressure is unstable and the pressure in the fire water pipe decreases, at this time, under the action of the elastic member, the inner sleeve will move toward the fire water pipe inlet, so that the overlapping area between the foam liquid inlet and the outflow port is reduced, and then the amount of foam liquid flowing in is reduced, so as to achieve a dynamic balance between the amount of foam liquid flowing in and the fire water flow rate, so that the mixing ratio of foam liquid and fire water is maintained within a certain ratio range; when the fire water supply pressure stops, the elastic member resumes its deformation, and the push plate and the inner sleeve are reset.
[0027] 1. The foam liquid inlet in the shape of an isosceles triangle can more accurately control the inlet amount of the foam liquid, thereby more accurately controlling the discharge speed of the foam liquid, so that the mixing ratio of the fire water and the foam liquid is maintained within a certain ratio range; and by setting foam liquid inlets of different sizes, the appropriate foam liquid inlet can be flexibly selected according to actual needs.
[0028] 2. The coordinated use of the fixing groove and the fixing piece can limit the circumference of the inner sleeve to prevent the inner sleeve from rotating in the outer sleeve during use. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 is a cross-sectional view of the embodiment of the present application in a stationary state;
[0030] Figure 2 It is a cross-sectional view of the embodiment of the present application when fire water supply pressure is applied.
[0031] Figure numerals: 1, fire water pipe; 2, injection pipe; 3, sliding sleeve; 31, outer sleeve; 311, second limit groove; 32, inner sleeve; 4, foam liquid inlet; 5, outflow port; 6, push plate; 61, first limit groove; 62, fixing rod; 7, elastic member; 8, fixing groove; 9, fixing member; 10, flange. DETAILED DESCRIPTION
[0032] The following is combined with Figure 1-2 This application is described in further detail.
[0033] Reference Figure 1 and Figure 2A fire-fighting foam liquid mixer with adaptive flow rate change includes a fire-fighting water pipe 1, an injection pipe 2 and a sliding sleeve 3, wherein the fire-fighting water pipe 1 can be connected to an external fire hydrant outlet or other water supply equipment, the sliding sleeve 3 is located in the fire-fighting water pipe 1, and the injection pipe 2 extends from the side wall of the fire-fighting water pipe 1 into the fire-fighting water pipe 1 and is connected to the sliding sleeve 3. The foam liquid enters the sliding sleeve 3 from the injection pipe 2 and is discharged from the sliding sleeve 3 to mix with the fire water in the fire-fighting water pipe 1 to form a foam fire-fighting liquid.
[0034] The sliding sleeve 3 includes an outer sleeve 31 and an inner sleeve 32. The inner sleeve 32 is slidably installed in the outer sleeve 31, and the outer wall of the inner sleeve 32 abuts against the inner wall of the outer sleeve 31. The outer sleeve 31 and the inner sleeve 32 are coaxially arranged with the fire water pipe 1. A foam liquid inlet 4 is opened on the side wall of the inner sleeve 32, and an outflow port 5 is opened on the side wall of the outer sleeve 31. One end of the injection pipe 2 is connected to the foam pump, and the other end is connected to the outflow port 5.
[0035] In the static state, the position of the end of the foam liquid inlet 4 close to the water outlet of the fire water pipe 1 corresponds to the position of the end of the outflow outlet 5 close to the water inlet of the fire water pipe 1, and the foam liquid inlet 4 and the outflow outlet 5 do not overlap; in the working state, the inner sleeve 32 moves toward the water outlet of the fire water pipe 1, and the foam liquid inlet 4 and the outflow outlet 5 partially overlap, and the foam liquid enters the inner sleeve 32 from the injection pipe 2 and is discharged from the inner sleeve 32.
[0036] A push plate 6 is provided at one end of the inner sleeve 32 close to the water inlet of the fire water pipe 1, and an elastic member 7 is provided between the push plate 6 and the outer sleeve 31. Both ends of the elastic member 7 act on the push plate 6 and the outer sleeve 31 respectively. The elastic member 7 enables the push plate 6 to have a force acting in the direction of the water inlet of the fire water pipe 1.
[0037] When there is no fire water supply pressure, the foam liquid inlet 4 and the outflow port 5 do not overlap, and the foam liquid cannot flow into the inner sleeve 32 through the foam liquid inlet 4. When fire water is introduced, the fire water supply pressure acts on the push plate 6, and the push plate 6 drives the inner sleeve 32 to slide toward the outlet of the fire water pipe 1, and the elastic member 7 is compressed, so that the foam liquid inlet 4 and the outflow port 5 partially overlap, and the foam liquid flows into the inner sleeve 32 through the foam liquid inlet 4, and is discharged toward the outlet of the fire water pipe 1, and is mixed with the fire water in the fire water pipe 1 to form a foam mixed liquid with fire extinguishing efficiency.
[0038] As the fire water supply pressure increases, the sliding distance of the inner sleeve 32 increases, the overlapping area between the foam liquid inlet 4 and the outflow port 5 also gradually increases, and the amount of foam liquid entering increases; if the fire water supply pressure is unstable and the pressure in the fire water pipe 1 decreases, at this time, under the action of the elastic member 7, the inner sleeve 32 will move toward the water inlet of the fire water pipe 1, so that the overlapping area between the foam liquid inlet 4 and the outflow port 5 is reduced, and then the amount of foam liquid entering is reduced, so as to achieve the effect of keeping the mixing ratio of fire water and foam liquid within a certain ratio range. When the fire water supply pressure stops, the elastic member 7 resumes its deformation, and the push plate 6 and the inner sleeve 32 are reset.
[0039] Specifically, the elastic member 7 is configured as a compression spring, which is sleeved on the inner sleeve 32 , and has two ends respectively abutting against the end of the push plate 6 and the end of the outer sleeve 31 .
[0040] In order to improve the stability of the installation of the elastic member 7, a first limiting groove 61 is circumferentially opened at one end of the push plate 6 close to the outer sleeve 31, and a second limiting groove 311 is circumferentially opened at one end of the outer sleeve 31 close to the push plate 6. The second limiting groove 311 is located on the inner side of the tube wall of the outer sleeve 31, and the two ends of the compression spring are respectively abutted against the first limiting groove 61 and the second limiting groove 311.
[0041] At the same time, one end of the push plate 6 is connected to a fixing rod 62, which is provided with an external thread. The fixing rod 62 extends into one end of the inner sleeve 32 close to the water inlet of the fire water pipe 1, and the two are threadedly connected to fix the push plate 6 to the end of the inner sleeve 32; when fire water is introduced into the fire water pipe 1, the fire water acts on the push plate 6, causing the inner sleeve 32 to move. At the same time, the fixing rod 62 is used to seal one end of the inner sleeve 32.
[0042] Furthermore, the foam liquid inlet 4 is an isosceles triangle, and the vertex of the isosceles triangle is arranged toward one side of the water outlet of the fire water pipe 1, so as to more accurately control the proportion of the foam liquid and stabilize the mixing ratio of the foam liquid and the fire water within a certain range.
[0043] Preferably, a plurality of foam liquid inlets 4 are evenly distributed along the circumferential direction on the side wall of the inner sleeve 32, and the vertex angles of each foam liquid inlet 4 are different, and a suitable foam liquid inlet 4 can be flexibly selected according to actual needs. In this embodiment, there are four foam liquid inlets 4, and the vertex angles of the foam liquid inlet 4 are 4°, 6°, 8°, and 10° respectively.
[0044] In order to limit the rotation of the inner sleeve 32 in the outer sleeve 31, the sliding sleeve 3 is further provided with a fixing groove 8 and a fixing member 9. The fixing groove 8 is provided on the side wall of the inner sleeve 32. The fixing groove 8 can be a through groove or a sunken groove. The fixing member 9 is installed on the outer sleeve 31, and one end of the fixing member 9 extends into the fixing groove 8. During the sliding process of the inner sleeve 32, the fixing member 9 slides synchronously in the fixing groove 8, which can limit the circumference of the inner sleeve 32 and prevent the inner sleeve 32 from rotating.
[0045] Furthermore, the number of the fixing grooves 8 is equal to the number of the foam liquid inlet ports 4, and the fixing grooves 8 correspond to the foam liquid inlet ports 4 one by one, so that when different foam liquid inlet ports 4 are used to discharge the foam liquid, the corresponding fixing grooves 8 can be used to limit the inner sleeve 32. In this embodiment, the fixing member 9 is a bolt, and the bolt is threadedly matched with the outer sleeve 31. By controlling the screwing in and screwing out of the bolt, the bolt can be matched with different fixing grooves 8.
[0046] Flanges 10 are fixed to the sides of both ends of the fire-fighting water pipe 1, respectively, and the flanges 10 are used for connection with fire-fighting equipment.
[0047] The implementation principle of a fire foam liquid mixer with adaptive flow change disclosed in the embodiment of the present application is as follows: when fire water is introduced, the fire water supply pressure acts on the push plate 6, and the push plate 6 drives the inner sleeve 32 to slide toward the water outlet of the fire water pipe 1, and the compression spring is compressed. At this time, the foam liquid inlet 4 and the outflow port 5 partially overlap, and the foam liquid enters the inner sleeve 32 through the foam liquid inlet 4. As the fire water supply pressure increases, the sliding distance of the inner sleeve 32 increases, the overlapping area of the foam liquid inlet 4 and the outflow port 5 also gradually increases, and the amount of foam liquid inflow increases; if the fire water supply pressure is unstable and the pressure in the fire water pipe 1 decreases, at this time, under the action of the compression spring, the inner sleeve 32 will move toward the water inlet of the fire water pipe 1, so that the overlapping area between the foam liquid inlet 4 and the outflow port 5 is reduced, and then the amount of foam liquid inflow is reduced, so as to achieve a dynamic balance between the foam liquid inflow and the fire water flow, so that the mixing ratio of the foam liquid and the fire water is maintained within a certain ratio range.
[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A fire-fighting foam liquid mixer with adaptive flow rate change, characterized in that: The invention comprises a fire water pipe (1), an injection pipe (2) and a sliding sleeve (3), wherein the sliding sleeve (3) is located in the fire water pipe (1), the sliding sleeve (3) comprises an outer sleeve (31) and an inner sleeve (32), the inner sleeve (32) is slidably mounted in the outer sleeve (31), and the outer wall of the inner sleeve (32) abuts against the inner wall of the outer sleeve (31); a foam liquid inlet (4) is provided on the side wall of the inner sleeve (32), and an outflow port (5) is provided on the side wall of the outer sleeve (31); the injection pipe (2) extends into the fire water pipe (1), one end of the injection pipe (2) is connected to a foam pump, and the other end of the injection pipe (2) is connected to the outflow port (5); a push plate (6) is fixed to one end of the inner sleeve (32) close to the water inlet of the fire water pipe (1), and an elastic member (7) is provided between the push plate (6) and the outer sleeve (31); In a stationary state, the foam liquid inlet (4) and the outflow port (5) do not overlap; when the fire water in the fire water pipe (1) acts on the push plate (6), the push plate (6) overcomes the elastic force of the elastic member (7) and drives the inner sleeve (32) to slide toward the water outlet of the fire water pipe (1), so that the foam liquid inlet (4) and the outflow port (5) partially overlap.
2. A fire-fighting foam liquid mixer with adaptive flow rate change according to claim 1, characterized in that: The foam liquid inlet (4) is in the form of an isosceles triangle, with the vertex of the isosceles triangle being arranged toward one side of the water outlet of the fire water pipe (1).
3. A fire-fighting foam liquid mixer with adaptive flow rate change according to claim 2, characterized in that: A plurality of foam liquid inlets (4) are provided, and the plurality of foam liquid inlets (4) are evenly distributed on the side wall of the inner sleeve (32) along the circumferential direction, and the top angles of the plurality of foam liquid inlets (4) are different.
4. The fire-fighting foam liquid mixer with adaptive flow rate change according to claim 1, characterized in that: The sliding sleeve (3) is further provided with a fixing groove (8) and a fixing member (9); the fixing groove (8) is formed on a side wall of the inner sleeve (32); the fixing member (9) is mounted on the outer sleeve (31); one end of the fixing member (9) extends into the fixing groove (8); and the fixing member (9) slides in the fixing groove (8) synchronously with the sliding of the inner sleeve (32).
5. The fire-fighting foam liquid mixer with adaptive flow rate change according to claim 4, characterized in that: The number of the fixed grooves (8) is equal to the number of the foam liquid inlets (4), and the fixed grooves (8) correspond to the foam liquid inlets (4) in a one-to-one manner.
6. The fire-fighting foam liquid mixer with adaptive flow rate change according to claim 1, characterized in that: The elastic member (7) is configured as a compression spring, which is sleeved on the inner sleeve (32), and the two ends of the compression spring respectively abut against the end of the push plate (6) and the outer sleeve (31).
7. A fire-fighting foam liquid mixer with adaptive flow rate change according to claim 6, characterized in that: A first limiting groove (61) is circumferentially formed at one end of the push plate (6) close to the outer sleeve (31), a second limiting groove (311) is circumferentially formed at one end of the outer sleeve (31) close to the push plate (6), and two ends of the elastic member (7) are respectively abutted against the first limiting groove (61) and the second limiting groove (311).
8. The fire-fighting foam liquid mixer with adaptive flow rate change according to claim 1, characterized in that: Flange plates (10) are respectively provided on the circumferential sides of both ends of the fire-fighting water pipe (1).