Wide-range foam proportioning mixer

Abstract

The wide-range foam proportioning mixer comprises a main pipe and a stock solution supply branch pipe, a control valve body used for controlling connection and disconnection and an adjusting valve body used for adjusting stock solution flow are arranged in the main pipe, a first water flow channel is formed in the control valve body, and a valve plate is arranged on the water outlet side of the first water flow channel; the adjusting valve body is arranged between the control valve body and the water outlet side of the main pipe, a second water flow channel and a stock solution channel used for communicating the stock solution supply branch pipe and the main pipe are arranged in the adjusting valve body, the stock solution supply branch pipe is connected with the inlet side of the stock solution channel, and a conical adjusting piece is arranged on the outlet side of the stock solution channel and connected with the valve plate. The valve plate is connected with an elastic piece so that the valve plate can seal the first water flow channel, and the conical adjusting piece seals the stock solution channel. According to the invention, different flows can be considered, the mixing ratio is continuously adjustable, and normal supply of foam stock solution can be realized.

Description

Technical Field

[0001] This invention relates to the field of foam fire extinguishing system technology, and more particularly to a wide-range foam proportioning mixer. Background Technology

[0002] Foam proportioners are key equipment in foam fire extinguishing systems. They are used to mix foam liquid and water in a certain proportion to form a foam mixture, which is then used by foam generating equipment (medium, low, and high expansion foam generators, foam guns, foam cannons, etc.) to generate foam for fire extinguishing.

[0003] Existing pressure-type foam proportioning devices mainly consist of a foam concentrate pressure storage tank with a bladder and a pressure proportioner based on the Venturi principle. The core component is a pressure-reducing orifice plate, which creates a pressure difference before and after the plate. A portion of the water enters the foam tank, compressing the bladder and forcing the foam concentrate through the tank's outlet pipe to a low-pressure area after the proportioner's orifice plate. The foam concentrate mixes with water to form a foam mixture, which is then output to a foam generating device to mix with air and produce foam for fire extinguishing.

[0004] The application scenarios in the market are quite complex, and some foam fire extinguishing systems need to accommodate varying flow rates. When the system flow rate needs to be set to a wide range, it means that both small and large flow rates need to be considered. Larger pipe diameters are required for higher flow rates. If the water flow rate is small, the pressure difference within the conventional proportioning mixer is insufficient to propel the foam concentrate within the capsules. If the foam concentrate cannot be supplied normally, the foam system will malfunction, and in severe cases, it may even lead to fire extinguishing failure, causing significant losses. It is evident that existing proportioning mixers have relatively narrow flow ranges and cannot meet mixing ratio requirements at even lower and wider flow rates. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a wide-range foam ratio mixer that can accommodate different flow rates, has a continuously adjustable mixing ratio, and is conducive to the normal supply of foam concentrate.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A wide-range foam proportioning mixer includes a main pipe and a feedstock supply branch pipe. The main pipe contains a control valve body for controlling on / off switching and a regulating valve body for regulating the feedstock flow rate. The control valve body contains a first water flow channel, and a valve plate is provided on the outlet side of the first water flow channel. The regulating valve body is located between the control valve body and the outlet side of the main pipe. The regulating valve body contains a second water flow channel and a feedstock channel for connecting the feedstock supply branch pipe and the main pipe. The feedstock supply branch pipe is connected to the inlet side of the feedstock channel. A conical regulating member is provided on the outlet side of the feedstock channel. The conical regulating member is connected to the valve plate. The valve plate is connected to an elastic member so that the valve plate closes the first water flow channel, and the conical regulating member closes the feedstock channel.

[0007] As a further improvement to the above technical solution: the elastic element is sleeved on the pull rod, the pull rod is provided with a first limiting part, the valve plate is provided with a connecting part, the connecting part passes through the control valve body and is connected to the pull rod, the control valve body is provided with a second limiting part, and the elastic element is provided between the first limiting part and the second limiting part.

[0008] As a further improvement to the above technical solution: the pull rod is a first screw, and the first limiting part is a limiting nut.

[0009] As a further improvement to the above technical solution: the second limiting part is a pad, and the pad is threadedly connected to the control valve body.

[0010] As a further improvement to the above technical solution: the elastic element is a helical spring or a disc spring.

[0011] As a further improvement to the above technical solution: a copper sleeve is provided on the outer periphery of the connecting part.

[0012] As a further improvement to the above technical solution: the tapered adjusting member is disposed on the connecting rod, and the connecting rod passes through the regulating valve body and is connected to the valve plate.

[0013] As a further improvement to the above technical solution: the connecting rod is a second screw, and a locking nut is provided on the second screw, the locking nut abutting against the tapered adjusting member.

[0014] As a further improvement to the above technical solution: the first water flow channel is provided with multiple channels and is evenly distributed along the circumference of the control valve body; the second water flow channel is provided with multiple channels and is evenly distributed along the circumference of the regulating valve body; and the outlet of the raw liquid channel is located at the center of the regulating valve body.

[0015] As a further improvement to the above technical solution: the two ends of the main tube are provided with mounting parts.

[0016] As a further improvement to the above technical solution: the mounting part is a mounting flange.

[0017] As a further improvement to the above technical solution: the inner diameter of the main pipe inlet side is smaller than the inner diameter of the portion of the main pipe located between the control valve body and the regulating valve body.

[0018] Compared with the prior art, the advantages of the present invention are as follows: This invention discloses a wide-range foam proportioning mixer. During use, most of the fire-fighting pressurized water enters the main pipe through the inlet side, while a small portion flows through the outlet branch pipe into the foam liquid tank, squeezing the bladder. The foam concentrate in the bladder is then forced through the concentrate supply branch pipe into the concentrate channel. Most of the water overcomes the elastic force of the elastic element, flowing through the first water flow channel to open the valve plate and continuing through the second water flow channel. The conical adjusting member moves with the valve plate, opening the outlet side of the concentrate channel. The foam concentrate flows out from the outlet side of the concentrate channel and mixes with most of the water to obtain a foam mixture. Because there is always a certain pressure difference between the water flowing out of the outlet branch pipe and the water after passing through the first water flow channel, even when the water flow is relatively small due to the large pipe diameter, the foam concentrate will not be unable to be supplied normally due to a small pressure difference when used for high flow rates. Furthermore, the flow rate of the foam concentrate is continuously adjusted according to the movement distance of the conical adjusting member, thus achieving continuous adjustment of the mixing ratio of water and foam concentrate. The structure is reasonable and effective.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the end face of an embodiment of the wide-range foam proportioning mixer of the present invention. Figure 2 This is a schematic diagram of the first main cross-sectional structure of the wide-range foam proportioning mixer of the present invention in the closed state.

[0021] Figure 3 This is a second main cross-sectional view of the open state of Embodiment 1 of the wide-range foam proportioning mixer of the present invention.

[0022] Figure 4 This is a second main cross-sectional view of the open state of Embodiment 1 of the wide-range foam proportioning mixer of the present invention.

[0023] Figure 5 This is a schematic diagram of the main structure of Embodiment 2 of the wide-range foam proportioning mixer of the present invention.

[0024] The labels in the diagram represent: 1. Main pipe; 11. Installation section; 2. Outlet branch pipe; 3. Raw material supply branch pipe; 4. Control valve body; 41. First water flow channel; 42. Valve plate; 421. Connecting part; 43. Elastic element; 44. Pull rod; 441. First limiting part; 45. Second limiting part; 46. Copper sleeve; 5. Adjusting valve body; 51. Second water flow channel; 52. Raw material channel; 53. Conical adjusting part; 54. Connecting rod; 55. Locking nut. Detailed Implementation

[0025] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1 Figures 1 to 4An embodiment of the wide-range foam proportioning mixer of the present invention is shown. The wide-range foam proportioning mixer of this embodiment includes a main pipe 1 and a raw material supply branch pipe 3. The main pipe 1 is provided with a control valve body 4 for controlling the on and off of the flow and a regulating valve body 5 for regulating the flow rate of the raw material. The control valve body 4 is provided with a first water flow channel 41. A valve plate 42 is provided on the outlet side of the first water flow channel 41. The regulating valve body 5 is located between the control valve body 4 and the outlet side of the main pipe 1. The regulating valve body 5 is provided with a second water flow channel 51 and a raw material channel 52 for connecting the raw material supply branch pipe 3 and the main pipe 1. The raw material supply branch pipe 3 is connected to the inlet side of the raw material channel 52. A conical regulating member 53 is provided on the outlet side of the raw material channel 52. The conical regulating member 53 is connected to the valve plate 42. The valve plate 42 is connected with an elastic member 43 so that the valve plate 42 closes the first water flow channel 41 and the conical regulating member 53 closes the raw material channel 52.

[0030] The wide-range foam proportioning mixer of this embodiment has the following initial state: Figure 2 As shown. During operation, as... Figure 3 and Figure 4 As shown, most of the fire-fighting pressurized water passes through the inlet side of main pipe 1 ( Figure 2 The middle is on the right side, and correspondingly, the outlet side is on the left side of the main pipe 1. A small portion of the water enters the main pipe 1 through the outlet branch pipe 2 and flows into the foam liquid tank to squeeze the capsule. The foam concentrate in the capsule is squeezed into the concentrate channel 52 through the concentrate supply branch pipe 3. Most of the water overcomes the elastic force of the elastic element 43 and flows through the first water flow channel 41 to open the valve plate 42, and continues to flow through the second water flow channel 51. The conical adjusting element 53 moves with the valve plate 42, so that the outlet side of the concentrate channel 52 is opened. The foam concentrate flows out from the outlet side of the concentrate channel 52 and mixes with most of the water to obtain a foam mixture. The wide-range foam proportioner of this embodiment has a certain pressure difference between the water flowing out of the outlet branch pipe 2 and the water after passing through the first water flow channel 41. When used for large flow rates, even if the water flow rate is relatively small due to the large pipe diameter, there will be no problem of insufficient foam concentrate supply due to the small pressure difference. Furthermore, the flow rate of foam concentrate can be continuously adjusted according to the moving distance of the conical adjustment member 53, thereby realizing the continuous adjustment of the mixing ratio of water and foam concentrate. The structure is reasonable and effective.

[0031] Furthermore, in this embodiment, the elastic element 43 is sleeved on the pull rod 44, the pull rod 44 is provided with a first limiting part 441, the valve plate 42 is provided with a connecting part 421, the connecting part 421 passes through the control valve body 4 and is connected to the pull rod 44, the control valve body 4 is provided with a second limiting part 45, and the elastic element 43 is disposed between the first limiting part 441 and the second limiting part 45. When the fire-fighting pressurized water impacts the valve plate 42, the valve plate 42 pulls the pull rod 44, and the first limiting part 441 on the pull rod 44 applies a force to the elastic element 43, compressing the elastic element 43. When the fire-fighting pressurized water stops entering, the elastic element 43 extends, and through the first limiting part 441, it drives the pull rod 44, the valve plate 42 and the conical adjusting part 53 to reset. The valve plate 42 re-closes the first water flow channel 41, and the conical adjusting part 53 re-closes the original liquid channel 52. The structure is reasonable and effective.

[0032] Furthermore, in this embodiment, the pull rod 44 is a first screw and the first limiting part 441 is a limiting nut, which can realize a reliable connection between the connecting part 421 and the pull rod 44, making it convenient to install and disassemble, and at the same time, the pre-compression amount of the elastic element 43 can be flexibly adjusted.

[0033] Furthermore, in this embodiment, the second limiting part 45 is a pad, which is threadedly connected to the control valve body 4. The pad prevents the elastic element 43 from directly contacting the control valve body 4. The threaded connection between the pad and the control valve body 4 ensures high reliability and facilitates installation and disassembly.

[0034] The elastic element 43 is preferably a helical spring or a disc spring.

[0035] In this embodiment, a copper sleeve 46 is provided on the outer periphery of the connecting part 421, which can prevent the connecting part 421 from directly contacting the control valve body 4, causing wear, and reduce the frictional resistance during the movement of the connecting part 421.

[0036] In this embodiment, the tapered adjusting member 53 is disposed on the connecting rod 54, and the connecting rod 54 passes through the regulating valve body 5 and is connected to the valve plate 42, so as to facilitate the synchronous operation between the tapered adjusting member 53 and the valve plate 42.

[0037] Furthermore, in this embodiment, the connecting rod 54 is a second screw, and a locking nut 55 is provided on the second screw, which abuts against the tapered adjusting member 53. Using a screw ensures high reliability and facilitates installation and disassembly. The locking nut 55 prevents the tapered adjusting member 53 from loosening or falling off the second screw, further improving reliability. Preferably, the outer circumference of the tapered adjusting member 53 can be provided with multiple annular grooves, thereby forming a multi-stage seal between it and the original liquid channel 52.

[0038] In a preferred embodiment, the first water flow channel 41 is provided with multiple channels and is evenly distributed along the circumference of the control valve body 4, the second water flow channel 51 is provided with multiple channels and is evenly distributed along the circumference of the regulating valve body 5, and the outlet of the original liquid channel 52 is located at the center of the regulating valve body 5, which is conducive to achieving full mixing of foam original liquid and water to obtain a uniform foam mixture.

[0039] In this embodiment, the two ends of the main pipe 1 are provided with mounting parts 11, which facilitates the installation of the wide-range foam proportioning mixer of this embodiment into the foam fire extinguishing system.

[0040] As a preferred embodiment, the mounting part 11 is a mounting flange, which has good reliability and is convenient to operate during installation and disassembly.

[0041] Example 2 Figure 5 Another embodiment of the wide-range foam proportioning mixer of the present invention is shown. The wide-range foam proportioning mixer of this embodiment is basically the same as that of Embodiment 1, except that: In this embodiment, the inner diameter of the water inlet side of the main pipe 1 is smaller than the inner diameter of the portion of the main pipe 1 located between the control valve body 4 and the regulating valve body 5 (refer to...). Figure 1 That is, the inner diameter of the part of the main pipe 1 located on the left side of the control valve body 4 is larger than the inner diameter of the part located on the right side of the control valve body 4, which can greatly reduce resistance loss.

[0042] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A wide-range foam proportioning mixer, characterized in that: The system includes a main pipe (1) and a raw liquid supply branch pipe (3). The main pipe (1) is equipped with a control valve body (4) for controlling the on / off state and a regulating valve body (5) for regulating the raw liquid flow rate. The control valve body (4) is equipped with a first water flow channel (41), and a valve plate (42) is provided on the outlet side of the first water flow channel (41). The regulating valve body (5) is located between the control valve body (4) and the outlet side of the main pipe (1). The regulating valve body (5) is equipped with a second water flow channel (51) and a branch pipe for connecting the raw liquid. The liquid supply branch pipe (3) is connected to the raw liquid channel (52) of the main pipe (1). The raw liquid supply branch pipe (3) is connected to the inlet side of the raw liquid channel (52). The outlet side of the raw liquid channel (52) is provided with a conical adjustment member (53). The conical adjustment member (53) is connected to the valve plate (42). The valve plate (42) is connected with an elastic member (43) so that the valve plate (42) closes the first water flow channel (41) and the conical adjustment member (53) closes the raw liquid channel (52).

2. The wide-range foam proportioning mixer according to claim 1, characterized in that: The elastic element (43) is sleeved on the pull rod (44), the pull rod (44) is provided with a first limiting part (441), the valve plate (42) is provided with a connecting part (421), the connecting part (421) passes through the control valve body (4) and is connected to the pull rod (44), the control valve body (4) is provided with a second limiting part (45), and the elastic element (43) is provided between the first limiting part (441) and the second limiting part (45).

3. The wide-range foam proportioning mixer according to claim 2, characterized in that: The pull rod (44) is the first screw, and the first limiting part (441) is the limiting nut.

4. The wide-range foam proportioning mixer according to claim 2, characterized in that: The second limiting part (45) is a pad, which is threadedly connected to the control valve body (4).

5. The wide-range foam proportioning mixer according to claim 2, characterized in that: The elastic element (43) is a helical spring or a disc spring.

6. The wide-range foam proportioning mixer according to claim 2, characterized in that: The connecting part (421) is provided with a copper sleeve (46) on its outer periphery.

7. The wide-range foam proportioning mixer according to any one of claims 1 to 6, characterized in that: The conical adjusting member (53) is disposed on the connecting rod (54), which passes through the regulating valve body (5) and is connected to the valve plate (42).

8. The wide-range foam proportioning mixer according to claim 7, characterized in that: The connecting rod (54) is a second screw, and a locking nut (55) is provided on the second screw. The locking nut (55) abuts against the tapered adjusting member (53).

9. The wide-range foam proportioning mixer according to any one of claims 1 to 6, characterized in that: The first water flow channel (41) is provided with multiple channels and is evenly distributed along the circumference of the control valve body (4). The second water flow channel (51) is provided with multiple channels and is evenly distributed along the circumference of the regulating valve body (5). The outlet of the original liquid channel (52) is located at the center of the regulating valve body (5).

10. The wide-range foam proportioning mixer according to any one of claims 1 to 5, characterized in that: The inner diameter of the main pipe (1) on the water inlet side is smaller than the inner diameter of the portion of the main pipe (1) located between the control valve body (4) and the regulating valve body (5).

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