A special canister head for water film forming foam extinguishing agent

Abstract

The utility model discloses a kind of water film forming foam fire extinguishing agent special canning head, including filling pipe, the liquid outlet end fixed sleeve of filling pipe is sleeved with silica gel sleeve, the bottom end of silica gel sleeve is provided with cross opening, the bottom end of silica gel sleeve is formed with multiple petal body by cross opening, one-way valve is installed in the bottom opening of filling pipe, the outer wall of filling pipe is slidably sleeved with bubble scraper;The utility model is simple in structure, and low in production cost, by setting one-way valve, silica gel sleeve and bubble scraper etc., the pulse type turbulent flow generated when fire extinguishing agent output can be reduced, to effectively inhibit the generation of foam, and in the process of filling pipe is extracted from tank, bubble scraper can slide on the surface of filling pipe, to scrape the foam adhered on the surface of filling pipe, reduce the foam residue on filling pipe, solve the problem that water film forming foam fire extinguishing agent cannot be quickly filled, and the amount of foam generated in filling process is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of fire extinguishing agent packaging technology, specifically a special packaging head for aqueous film-forming foam fire extinguishing agents. Background Technology

[0002] Aqueous film-forming foam (AFFF) fire extinguishing agents are highly effervescent liquids, often filled using high-speed gear pumps. During operation, the gear pumps squeeze and agitate the extinguishing agent, increasing its flow rate and causing pulsed turbulence in the foam liquid output from the filling port. This results in excessive foam production when the extinguishing agent is poured into the aluminum can, and the foam overflows from the container opening. Furthermore, the foam has strong adhesion, easily sticking to the filling pipe and affecting production.

[0003] Existing technologies mostly alleviate the above problems by slowing down the flow rate of the filling liquid and increasing the filling time, resulting in low filling production efficiency. To address this, we propose a special filling head for aqueous film-forming foam fire extinguishing agents. Utility Model Content

[0004] The purpose of this invention is to provide a special canister head for aqueous film-forming foam fire extinguishing agents to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A special filling head for aqueous film-forming foam fire extinguishing agent includes a filling tube, a silicone sleeve fixedly sleeved at the liquid outlet end of the filling tube, a cross opening at the bottom end of the silicone sleeve, the cross opening forming multiple petals at the bottom end of the silicone sleeve, a one-way valve installed inside the bottom opening of the filling tube, and a foam scraper slidably sleeved on the outer wall of the filling tube.

[0007] As a further embodiment of this utility model: the bottom end of the silicone sleeve is hemispherical, and the cross opening is formed on the hemispherical bottom end of the silicone sleeve.

[0008] As a further embodiment of this utility model: the bubble scraper is a cone with a through hole in the middle. The bubble scraper is slidably sleeved on the filling tube through the through hole. The outer diameter of the filling tube is adapted to the diameter of the through hole, and the cone end of the bubble scraper faces downward.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] This invention has a simple structure and low production cost. By incorporating a one-way valve, a silicone sleeve, and a foam scraper, it can reduce the pulse-like turbulence generated during the output of the extinguishing agent, thereby effectively suppressing foam generation. Furthermore, during the process of extracting the filling pipe from the tank, the foam scraper can slide on the surface of the filling pipe to scrape off the foam adhering to the surface, reducing foam residue on the filling pipe. This solves the problem of the inability to quickly fill aqueous film-forming foam extinguishing agents, and significantly reduces the amount of foam generated during the filling process. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a special canister head for aqueous film-forming foam fire extinguishing agents.

[0012] Figure 2 This is a partial cross-sectional view of a canister head for an aqueous film-forming foam fire extinguishing agent.

[0013] Figure 3 This is a schematic diagram illustrating the use of a special canister head for an aqueous film-forming foam fire extinguishing agent.

[0014] Among them, 1 is the filling tube, 2 is the one-way valve, 3 is the silicone sleeve, 4 is the cross opening, 5 is the valve body, 6 is the bubble scraper, 7 is the through hole, 8 is the conical surface, and 9 is the tank body. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-3 In this embodiment of the present invention, a special filling head for aqueous film-forming foam fire extinguishing agent includes a filling tube 1. The top end of the filling tube 1 is fixedly installed at the filling port of the filling equipment. A silicone sleeve 3 is fixedly sleeved at the liquid outlet end of the filling tube 1. A cross opening 4 is opened at the bottom end of the silicone sleeve 3, and the cross opening 4 forms multiple petals 5 at the bottom end of the silicone sleeve 3. A one-way valve 2 is installed in the bottom opening of the filling tube 1. A foam scraper 6 is slidably sleeved on the outer wall of the filling tube 1.

[0017] By adopting the above-described scheme, in use, after inserting the bottom end of the filling tube 1 and the silicone sleeve 3 into the tank 9, the foam scraper 6 will press against the top opening of the tank 9. Then, the gear pump of the filling equipment will fill the filling tube 1 with aqueous film-forming foam extinguishing agent. The extinguishing agent will enter the silicone sleeve 3 through the one-way valve 2 and accumulate in the space between the cross opening 4 and the one-way valve 2. Then, under the filling pressure, it will force open the valve 5 at the cross opening 4 and inject into the tank 9. Because the valve 5 has a certain elasticity, the extinguishing agent will be buffered when passing through the cross opening 4, thereby effectively alleviating the pulse-like turbulence caused by the gear pump between the one-way valve 2 and the cross opening 4, effectively suppressing foam generation, and stopping the filling. Afterwards, each valve 5 will reset under its own elastic force, causing the cross opening 4 to close, thereby reducing the dripping of extinguishing agent. Then, the filling tube 1 is pulled out from the tank 9. During this process, the foam scraper 6 will still stick to the tank opening under the action of gravity, which is equivalent to sliding on the surface of the filling tube 1 to scrape off the foam adhering to the surface of the filling tube 1, reducing the foam residue on the filling tube 1. When the silicone sleeve 3 is pulled out from the tank 9, it can drive the foam scraper 6 to detach from the tank opening, completing one filling. This filling head has a simple structure and low production cost, and solves the problem of the inability to quickly fill aqueous film-forming foam extinguishing agents. After actual filling test, it can be 1-2 times faster than the original filling speed, and the amount of foam generated during the filling process is greatly reduced.

[0018] Specific combination Figure 1 and Figure 2 In one embodiment of the present invention, the bottom end of the silicone sleeve 3 is hemispherical, and the cross opening 4 is formed on the hemispherical bottom end of the silicone sleeve 3.

[0019] Specific combination Figure 1-3 In one embodiment of this utility model, the bubble scraper 6 is a cone with a through hole 7 in the middle. The bubble scraper 6 is slidably sleeved on the filling tube 1 through the through hole 7. The outer diameter of the filling tube 1 is adapted to the diameter of the through hole 7. The cone end of the bubble scraper 6 faces downward.

[0020] During filling, the conical surface 8 of the foam scraper 6 will be attached to the opening of the can 9. After filling is completed, during the process of lifting the filling tube 1, the foam scraper 6 will slide along the surface of the filling tube 1, and the scraped foam will collect on the conical surface 8 and drip down, so as to effectively reduce the foam adhering to the foam scraper 6. In addition, the material of the foam scraper 6 is preferably polytetrafluoroethylene (PTFE), so as to utilize the low coefficient of friction and self-lubricating properties of PTFE to ensure that the foam scraper 6 can slide smoothly on the filling tube 1. PTFE also has good hydrophobicity, which can reduce the foam adhering to the surface of the foam scraper 6. In order to ensure that the foam scraper 6 can slide stably on the filling tube 1 during the lifting process, a counterweight can also be installed on the top of the foam scraper 6.

[0021] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A special canister for aqueous film-forming foam fire extinguishing agent, characterized in that: The filling tube (1) is fixedly fitted with a silicone sleeve (3) at the liquid outlet end of the filling tube (1). A cross opening (4) is provided at the bottom end of the silicone sleeve (3). The cross opening (4) forms multiple valves (5) at the bottom end of the silicone sleeve (3). A one-way valve (2) is installed in the bottom opening of the filling tube (1). A bubble scraper (6) is slidably fitted on the outer wall of the filling tube (1).

2. The dedicated canister for aqueous film-forming foam fire extinguishing agent according to claim 1, characterized in that: The bottom end of the silicone sleeve (3) is hemispherical, and the cross opening (4) is opened on the hemispherical bottom end of the silicone sleeve (3).

3. The dedicated canister for aqueous film-forming foam fire extinguishing agent according to claim 1, characterized in that: The bubble scraper (6) is a cone with a through hole (7) in the middle. The bubble scraper (6) is slidably sleeved on the filling tube (1) through the through hole (7). The outer diameter of the filling tube (1) is adapted to the diameter of the through hole (7). The cone end of the bubble scraper (6) faces downward.

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