Wide range proportioner

Abstract

The application provides a wide-range proportional mixer, which comprises a proportional mixer body and two groups of left and right connecting flanges, a water inlet cavity is arranged in the center of the proportional mixer body, an adjusting orifice plate is movably arranged at the tail end of the water inlet cavity, a disc head screw and a top connecting pin are arranged between the adjusting orifice plate and the proportional mixer body, a central connecting pin is arranged in the center of the adjusting orifice plate, an outer end of the central connecting pin is provided with a linkage rod, a lower end of the linkage rod is provided with a piston, a lower end of the piston is provided with a flow guide head, an outer end of the flow guide head is provided with a foam liquid inlet adjusting nut, an outer end of the linkage rod is provided with a spring, an outer end of the spring is provided with a foam liquid cavity, an outer end of the foam liquid cavity is provided with a metering cone, and a hexagon nut is arranged at the side end of the proportional mixer body. The application solves the problem that the flow range is limited when the traditional proportional mixer is used, and can accurately control the mixing ratio of the foam liquid and the water flow when the foam liquid is injected into the water flow in a large water pressure range and a large flow range of 4L-120L / S.

Description

Technical Field

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

[0002] A foam proportioner is a device used in fire protection systems, primarily for mixing water and foam extinguishing agents in a specific ratio to create a foam solution. This device is crucial in firefighting, especially when extinguishing oil fires or other flammable liquid fires, as foam effectively isolates oxygen and inhibits combustion.

[0003] (1) Structural composition: A wide-range proportional mixer is composed of a brass body, a stainless steel guide head, a stainless steel spring, a stainless steel connecting rod, a stainless steel metering cone, and an adjusting orifice plate.

[0004] (2) Working principle: Before a wide-range proportioning mixer starts operating, the water pressure on both sides of the mixer is the same. In the event of a fire, due to the opening of some spray heads, foam concentrate enters the water flow through the metering cone and orifice plate. As the number of spray heads opens increases, the water flow rate also increases, causing the guide head to open more significantly, which in turn opens the cone, allowing more foam concentrate to enter the water flow. This working principle enables the wide-range proportioning mixer to accurately mix foam concentrate at both lower and higher flow rates.

[0005] (3) Function: Provides a stable mixing ratio: ensures an accurate and stable mixing ratio of foam extinguishing agent and water, guaranteeing the fire extinguishing effect; Improve fire extinguishing efficiency: It allows the foam extinguishing agent to be fully mixed with water to form a high-quality foam mixture, thereby improving fire extinguishing efficiency; Wide range of applications: Because it can mix foam liquid at low flow rates, a wide-range proportioning mixer is well-suited for closed foam / water sprinkler systems, as these systems have low initial flow rates and can activate more sprinklers to increase flow rates when the fire is intense.

[0006] Historical data from closed-loop sprinkler systems shows that, on average, only four or five sprinkler heads are used during each fire. Therefore, NFPA 30 requires that the system properly mixes the foam concentrate even with only a minimum of four sprinkler heads in operation; otherwise, the fire may be difficult to control. The flow rate required for this condition is significantly lower than the minimum design flow rate of traditional proportioning mixers. However, a wide-range proportioner can achieve proper foam concentrate mixing even with fewer sprinkler heads in operation.

[0007] Flexibility: Adaptable to various flow requirements and suitable for fire protection systems of different sizes. Can be installed horizontally or vertically.

[0008] In existing technologies, traditional proportioning mixers used in foam fire extinguishing systems have limitations: the lower flow rate cannot meet the flow rate requirements when only four sprinkler heads are operating, and the upper flow rate cannot meet the large flow rate of 120L / S. Furthermore, they cannot accurately mix the foam concentrate and water in the correct proportions, affecting the fire extinguishing effect of the foam extinguishing liquid. Therefore, we have made improvements and proposed a wide-range proportioning mixer. Summary of the Invention

[0009] The purpose of this invention is to solve the problem that traditional proportioning mixers cannot accurately mix foam concentrate and water in the correct proportions at low or high flow rates and high working pressures, thus affecting the fire extinguishing effect of foam extinguishing liquid.

[0010] To achieve the above-mentioned objectives, the present invention provides the following technical solution: A wide-range ratio mixer to improve the above-mentioned problems.

[0011] The application is as follows: A wide-range proportioning mixer includes a proportioning mixer body and two sets of left and right connecting flanges. The proportioning mixer body has a water inlet chamber in the center, and an adjusting orifice plate is movably provided at the tail end of the water inlet chamber. A pan head screw and a top connecting pin are provided between the adjusting orifice plate and the proportioning mixer body. A central connecting pin is provided in the center of the adjusting orifice plate. A connecting rod is provided at the outer end of the central connecting pin. A piston is provided at the lower end of the connecting rod. A guide head is provided at the lower end of the piston. A foam liquid inlet adjusting nut is provided at the outer end of the guide head. A spring is provided at the outer end of the connecting rod. A foam liquid chamber is provided at the outer end of the spring. A metering cone is provided at the outer end of the foam liquid chamber. A hexagonal nut is provided at the side end of the proportioning mixer body.

[0012] As a preferred technical solution of this application, the adjusting orifice plate is connected to the upper inner end of the proportioning mixer body by a top connecting pin, and the central connecting pin connects the linkage rod and the outer side of the center of the adjusting orifice plate.

[0013] As a preferred technical solution of this application, the linkage rod and the piston are fixedly connected, the upper end of the piston is attached to the upper inner surface of the foam liquid chamber, the guide head is fixed to the lower end of the linkage rod, and the outer end of the guide head is movably connected to the foam liquid inlet adjusting nut.

[0014] As a preferred technical solution of this application, the foam liquid inlet adjusting nut is movably connected to the metering cone, the spring is wrapped around the outside of the linkage rod, and the upper and lower ends of the spring are respectively fixed to the inner surfaces of the upper and lower ends of the foam liquid cavity.

[0015] As a preferred technical solution of this application, the foam liquid chamber is wrapped inside the metering cone, and the connecting rod and the upper end of the foam liquid chamber are sealed by a piston.

[0016] As a preferred technical solution of this application, the foam liquid chamber is filled with foam raw liquid, the lower end of the metering cone is connected to the downstream foam pipe, the lower end of the regulating orifice plate is provided with a connection hole, and the connection hole is connected to the downstream outlet pipe through a connection flange.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: In the scheme of this application: This proportioning mixer has a wide flow range, capable of proportionally mixing foam liquid within a flow range of 4L~120L / S and a maximum working pressure of 1.60MPa. It can meet the needs of closed foam / water spray systems with low initial flow rates. Even in a low flow state where only four spray heads are working, the foam liquid can be injected into the water flow in a proportion to form a foam mixture with a precise ratio of 3%. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall front view structure of a wide-range ratio mixer provided in this application; Figure 2 A schematic diagram of the overall rear view structure of a wide-range proportional mixer provided in this application; Figure 3 This application provides a wide-range proportional mixer Figure 1 Front view; Figure 4 A side view of the connection between the proportioner body and the connecting flange of a wide-range proportioner provided in this application; Figure 5 A front cross-sectional view of the proportioner body of a wide-range proportioner provided in this application; Figure 6 A cross-sectional top view of a hexagonal nut for a wide-range ratio mixer provided in this application.

[0019] The image shows: 1. Proportional mixer body; 2. Adjusting orifice plate; 3. Linking rod; 4. Foam liquid chamber; 5. Guide head; 6. Foam liquid inlet adjusting nut; 7. Metering cone; 8. Connecting pin; 9. Hex nut; 10. Water inlet chamber; 11. Piston; 12. Spring; 13. Pan head screw; 14. Connecting flange; 15. Connecting hole. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely to illustrate some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that, unless otherwise specified, the embodiments, features, and technical solutions in the embodiments of the present invention can be combined with each other.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] like Figure 1-6 As shown, this embodiment proposes a wide-range proportioning mixer, including a proportioning mixer body 1 and two sets of connecting flanges 14 on the left and right. The proportioning mixer body 1 has a water inlet chamber 10 in the center, and an adjusting orifice plate 2 is movably provided at the tail end of the water inlet chamber 10. A pan head screw 13 and a top connecting pin 8 are provided between the adjusting orifice plate 2 and the proportioning mixer body 1. A central connecting pin 8 is provided in the center of the adjusting orifice plate 2. A connecting rod 3 is provided at the outer end of the central connecting pin 8. A piston 11 is provided at the lower end of the connecting rod 3. A guide head 5 is provided at the lower end of the piston 11. A foam liquid inlet adjusting nut 6 is provided at the outer end of the guide head 5. A spring 12 is provided at the outer end of the connecting rod 3. A foam liquid chamber 4 is provided at the outer end of the spring 12. A metering cone 7 is provided at the outer end of the foam liquid chamber 4. A hexagonal nut 9 is provided at the side end of the proportioning mixer body 1.

[0024] The connecting flange 14 facilitates the connection and installation of the mixer body 1 with other components (such as pipes), making the assembly of the entire system more convenient and stable, and is conducive to the construction of a complete fire protection or other system that requires foam mixture; The inlet chamber 10 provides a channel for water to enter the mixer. The movable regulating orifice plate 2 can move according to the change of water pressure. The pan head screw 13 and the top connecting pin 8 ensure the stability of the connection of the regulating orifice plate 2 and allow it to move within a certain range. The central connecting pin 8 is used to connect the connecting rod 3 later, providing a connection basis for the regulating orifice plate 2 to drive the connecting rod 3 to move. The linkage rod 3 transmits the movement of the adjusting orifice plate 2 to components such as the piston 11, realizing the linkage function; the piston 11 cooperates with the foam liquid chamber 4 to control the flow space and pressure changes of the foam concentrate; the guide head 5 guides the flow direction of the foam concentrate, and the foam concentrate inlet adjusting nut 6 can adjust the flow rate of the foam concentrate; the spring 12 can control the displacement of the linkage rod 3 according to the water pressure change, thereby indirectly controlling the amount of foam concentrate entering; the foam liquid chamber 4 stores the foam concentrate, and the metering cone 7 can measure or control the flow rate of the entering foam concentrate to a certain extent; the hexagonal nut 9 may be used for fixing or adjusting some components, facilitating maintenance and adjustment.

[0025] The adjusting orifice plate 2 is connected to the upper inner end of the proportioning mixer body 1 via the top connecting pin 8, and the central connecting pin 8 connects the linkage rod 3 and the outer side of the center of the adjusting orifice plate 2.

[0026] The linkage rod 3 is fixedly connected to the piston 11. The upper end of the piston 11 is attached to the upper inner surface of the foam liquid chamber 4. The guide head 5 is fixed to the lower end of the linkage rod 3. The outer end of the guide head 5 is movably connected to the foam liquid inlet adjusting nut 6.

[0027] The foam liquid inlet adjusting nut 6 is movably connected to the metering cone 7. The spring 12 is wrapped around the outside of the linkage rod 3, and the upper and lower ends of the spring 12 are respectively fixed to the inner surfaces of the upper and lower ends of the foam liquid cavity 4.

[0028] The foam liquid chamber 4 is wrapped inside the metering cone 7, and the connecting rod 3 and the upper end of the foam liquid chamber 4 are sealed by the piston 11.

[0029] This ensures that all components can work together effectively, accurately translating changes in water pressure into control of the amount of foam concentrate entering the system. The movable connections and sealing design not only guarantee the relative flexibility of movement between components but also prevent liquid leakage, thus improving the mixer's efficiency and stability.

[0030] The foam liquid chamber 4 is filled with foam concentrate. The lower end of the metering cone 7 is connected to the downstream foam pipe. The lower end of the regulating orifice plate 2 is provided with a connection hole 15. The connection hole 15 is connected to the downstream outlet pipe through the connection flange 14.

[0031] The outflow channels for foam concentrate and water were clearly defined, allowing them to flow separately to their respective downstream pipes. This created conditions for subsequent mixing in the overall downstream pipe and ensured the orderly progress of the mixing process.

[0032] (1) Installation stage: A wide range proportioning mixer is connected and installed with the inlet pipe, outlet pipe and foam downstream pipe through the two sets of connecting flanges 14 on the left and right sides to ensure that the components are firmly connected and well sealed to prevent leakage. (2) Preparation stage: Fill the foam liquid chamber 4 with foam stock solution and check whether the connection of each component is normal, especially whether the moving connection between components such as adjusting orifice plate 2, connecting rod 3, piston 11, guide head 5, foam liquid inlet adjusting nut 6 is smooth. (3) Work phase: After the system is started, water flows into the inlet chamber 10, and the water pressure acts on the regulating orifice plate 2, causing it to tilt under the action of the top connecting pin 8. The tilting of the adjusting plate 2 causes the connecting rod 3 to move downward, pushing the piston 11 and the spring 12 downward. The elastic properties of the spring 12 determine the displacement of the connecting rod 3. The displacement of the linkage rod 3 changes the size of the gap between the guide head 5 and the foam liquid inlet adjusting nut 6, thereby controlling the flow rate of the foam raw liquid from the foam liquid chamber 4 into the downstream foam pipe through the gap; At the same time, water enters the downstream outlet pipe through the connection hole 15 between the regulating orifice plate 2 and the main body of the proportioning mixer 1; Ultimately, the water and foam concentrate are mixed in the main downstream pipeline to form a 3% foam mixture.

[0033] (4) Maintenance phase: Regularly check the wear of each component, especially the moving parts and sealing parts. If necessary, make necessary adjustments and maintenance through components such as hexagonal nuts 9 to ensure that the mixer is always in good working condition.

[0034] When this application is used: After the system is activated, water flows into the inlet chamber 10 and presses against the regulating orifice plate 2. The regulating orifice plate 2 tilts under the action of the top connecting pin 8. The adjustment plate 2 tilts, causing the connecting rod 3 to move downward, pushing the piston 11 and spring 12 downward. The performance of the spring 12 determines the displacement of the connecting rod 3. The displacement of the linkage rod 3 determines the size of the gap between the guide head 5 and the foam liquid inlet adjusting nut 6, and the foam raw liquid enters the foam chamber through the gap; Water enters the downstream outlet pipe through the connection hole 15 between the regulating orifice plate 2 and the main body of the proportioning mixer 1. The foam concentrate enters the downstream foam pipe through the gap between the guide head 5 and the foam concentrate inlet adjusting nut 6. The two mix in the overall downstream pipe to form a 3% foam mixture.

[0035] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, as well as all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

Claims

1. A wide-range proportioner comprising a proportioner main body (1) and left and right groups of connecting flanges (14), characterized in that, The proportioning mixer body (1) has a water inlet chamber (10) in the center. The water inlet chamber (10) has an adjustable orifice plate (2) at its tail end. The adjustable orifice plate (2) and the proportioning mixer body (1) are connected by a pan head screw (13) and a top connecting pin. The adjustable orifice plate (2) has a central connecting pin (8) in the center. The central connecting pin (8) has a connecting rod (3) at its outer end. The connecting rod (3) has a piston (11) at its lower end. The piston (11) has a guide head (5) at its lower end. The guide head (5) has a foam liquid inlet adjusting nut (6) at its outer end. The connecting rod (3) has a spring (12) at its outer end. The spring (12) has a foam liquid chamber (4) at its outer end. The foam liquid chamber (4) has a metering cone (7) at its outer end. The proportioning mixer body (1) has a hexagonal nut (9) at its side end.

2. A wide-range ratio mixer according to claim 1, characterized in that, The adjusting orifice plate (2) is connected to the upper inner end of the proportioning mixer body (1) by a top connecting pin, and the central connecting pin (8) connects the linkage rod (3) and the outer center of the adjusting orifice plate (2).

3. A wide-range ratio mixer according to claim 2, characterized in that, The linkage rod (3) is fixedly connected to the piston (11). The upper end of the piston (11) is attached to the upper inner surface of the foam liquid cavity (4). The guide head (5) is fixed to the lower end of the linkage rod (3). The outer end of the guide head (5) is movably connected to the foam liquid inlet adjusting nut (6).

4. A wide-range ratio mixer according to claim 3, characterized in that, The foam liquid inlet adjusting nut (6) is movably connected to the metering cone (7), the spring (12) is wrapped around the outside of the connecting rod (3), and the upper and lower ends of the spring (12) are respectively fixed to the inner surfaces of the upper and lower ends of the foam liquid cavity (4).

5. A wide-range ratio mixer according to claim 4, characterized in that, The foam liquid cavity (4) is wrapped inside the metering cone (7), and the connecting rod (3) and the upper end of the foam liquid cavity (4) are sealed by a piston.

6. A wide-range ratio mixer according to claim 5, characterized in that, The foam liquid chamber (4) is filled with foam raw liquid. The lower end of the metering cone (7) is connected to the downstream foam pipe. The lower end of the regulating orifice plate (2) is provided with a connection hole (15). The connection hole (15) is connected to the downstream water outlet pipe through the connection flange (14).

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