A multi-functional foam gun
By designing a multi-functional foam gun that combines a primary foaming tube, a secondary foaming tube, and a foaming net, it achieves efficient fire extinguishing effects of foam extinguishing agents under different fire conditions, solves the problem of the single spray specification of traditional foam guns, and provides flexible selection of foaming ratio and range.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HONGRUI FIRE FIGHTING EQUIPMENT CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-05-26
AI Technical Summary
Existing traditional foam guns spray foam extinguishing agents of a single specification, which cannot effectively extinguish fires in different fire situations.
A multi-functional foam gun was designed, which uses a combination of primary and secondary foaming tubes with negative pressure suction and foaming net to foam. It can switch the foaming ratio and range under different conditions, switch the spray mode by folding the movable end of the bend connector, and can disassemble and install the loading cylinder to deal with different fire conditions.
It enables foam extinguishing agents to cover fire sources at close range with low water content at a foaming ratio of 20 times and prevent reignition, and to suppress fire at a long distance with high water content at a foaming ratio of 8 times, making it suitable for various fire situations.
Smart Images
Figure CN224269999U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of fire-fighting equipment technology, and in particular relates to a multi-functional foam gun. Background Technology
[0002] Existing traditional foam guns use the ejection principle to create negative pressure around the rapidly ejected fluid, drawing in air from the outside. After one negative pressure air intake and foaming process, the foam extinguishing agent is sprayed out. However, the sprayed foam extinguishing agent is of a single specification and cannot be used to effectively extinguish different fire situations.
[0003] This invention relates to a multi-functional foam gun that solves the above problems. Utility Model Content
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A multi-functional foam gun includes a first gun body, a primary foaming tube, a connector assembly, a secondary foaming tube, and a foam net holder. The primary foaming tube is installed at the front end of the first gun body, and the secondary foaming tube is installed at the front end of the primary foaming tube via the connector assembly. The foam net holder is installed at the outlet of the secondary foaming tube. The outer wall of the primary foaming tube is provided with a plurality of first air intake holes, which are perpendicular to the central axis of the primary foaming tube. The outer wall of the secondary foaming tube is provided with a plurality of second air intake holes, which are parallel to the central axis of the secondary foaming tube. A first connector is installed at the rear end of the first gun body.
[0006] As a preferred embodiment, the connector assembly includes a first connecting pipe, a fixed end of a bend connector, a movable end of a bend connector, a second connecting pipe, and a second connector. The first connecting pipe is installed at the front end of the primary foaming pipe, the fixed end of the bend connector is installed on the first connecting pipe, the movable end of the bend connector is installed on the fixed end of the bend connector by bolts, the second connecting pipe is installed at the front end of the movable end of the bend connector, and the secondary foaming pipe is installed on the second connecting pipe through the second connector.
[0007] As a preferred embodiment, the movable end of the turning joint is symmetrically provided with two connecting brackets at its rear end. The two connecting brackets are located on both sides of the front end of the fixed end of the turning joint, respectively. The middle section of the bolt is threaded to the connecting bracket, and the tail section of the bolt is inserted into the countersunk hole on the side of the fixed end of the turning joint, with the bolt and the countersunk hole having an interference fit.
[0008] As a preferred embodiment, the primary foaming tube is divided into a connecting end and a foaming end, with the foaming end located in front of the connecting end, the first air intake hole located at the foaming end, and the inner diameter of the foaming end being larger than the inner diameter of the connecting end.
[0009] As a preferred embodiment, a guide tube is provided inside the secondary foaming tube, the guide tube is positioned towards the foaming net holder, the inner diameter of the secondary foaming tube is larger than the outer diameter of the guide tube, and the second air intake hole is located outside the guide tube.
[0010] As a preferred embodiment, the system also includes a foam rod assembly, which includes a filling cylinder and two reducing connectors. The two reducing connectors are respectively installed at both ends of the filling cylinder, and one of the reducing connectors is connected to a first connector, which has an interception net installed inside.
[0011] As a preferred embodiment, the device also includes a second gun body, the front end of which is connected to another reducing connector, and a third connector is installed at the rear end of the second gun body.
[0012] Compared with existing technologies, the advantages of this utility model are:
[0013] 1. The primary foaming tube, secondary foaming tube, and foaming net holder designed in this utility model use a secondary negative pressure suction and foaming net foaming method to enable the foam gun to achieve a final foaming ratio of 20 times for the foam extinguishing agent. In this state, the foam extinguishing agent has a low water content, low impact force, and short range, making it suitable for covering fire sources at close range, effectively extinguishing fires and preventing reignition.
[0014] 2. The fixed end and movable end of the bend joint designed in this utility model can control the movable end of the bend joint to rotate relative to the fixed end of the bend joint, so that the movable end of the bend joint folds downward. In this state, the foam extinguishing agent is sprayed out from the fixed end of the bend joint after passing through the foaming tube only once. The foam extinguishing agent is sprayed out directly after being foamed by air drawn in by negative pressure once. The foam gun has a foaming ratio of 8 times. The foam extinguishing agent has a high water content, a large impact force, and a long range, making it suitable for quickly suppressing fires.
[0015] 3. The loading cylinder designed in this utility model can be freely disassembled and assembled according to the usage. The first gun body can directly pass in the foam extinguishing agent, or after the loading cylinder is added, water flows through the solid foam rods in the loading cylinder to dissolve the extinguishing agent and form an extinguishing agent solution to deal with more different fire situations. In addition, a second gun body is added at the rear of the loading cylinder for easy handling of the foam gun. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the present invention.
[0017] Figure 2 This is a schematic diagram of the folded state of the movable end of the bend joint of this utility model.
[0018] Figure 3 This is a cross-sectional schematic diagram of the present invention.
[0019] Figure 4 This is a cross-sectional schematic diagram of the primary foaming tube and the secondary foaming tube of this utility model.
[0020] Figure 5 This is a utility model Figure 1 A schematic diagram from the perspective of A.
[0021] The labels in the diagram are as follows: 1. First gun body; 2. Primary foaming tube; 3. Secondary foaming tube; 4. Foaming net holder; 5. First suction port; 6. Second suction port; 7. First connector; 8. First connecting pipe; 9. Fixed end of bend connector; 10. Movable end of bend connector; 11. Second connecting pipe; 12. Second connector; 13. Bolt; 14. Connecting frame; 15. Countersunk hole; 16. Connecting end; 17. Foaming end; 18. Guide pipe; 19. Filling cylinder; 20. Reducing connector; 21. Interception net; 22. Second gun body; 23. Third connector. Detailed Implementation
[0022] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following embodiments or drawings are used to illustrate this utility model, but are not intended to limit the scope of this utility model.
[0023] A multi-functional foam gun, such as Figures 1 to 5 As shown, the device includes a first gun body 1, a primary foaming tube 2, a connector assembly, a secondary foaming tube 3, and a foaming net holder 4. The primary foaming tube 2 is installed at the front end of the first gun body 1. The secondary foaming tube 3 is installed at the front end of the primary foaming tube 2 through the connector assembly. The foaming net holder 4 is installed at the outlet of the secondary foaming tube 3. The outer wall of the primary foaming tube 2 is surrounded by a plurality of first air intake holes 5, which are perpendicular to the central axis of the primary foaming tube 2. The outer wall of the secondary foaming tube 3 is surrounded by a plurality of second air intake holes 6, which are parallel to the central axis of the secondary foaming tube 3. A first connector 7 is installed at the rear end of the first gun body 1.
[0024] The primary foaming tube 2 is threadedly connected to the first gun body 1, and the foaming net holder 4 is threadedly connected to the secondary foaming tube 3.
[0025] The foam extinguishing agent passes sequentially through the primary foaming pipe 2, the secondary foaming pipe 3, and the foaming net holder 4. It is foamed by a secondary negative pressure suction and foaming net, so that the final foaming ratio of the foam extinguishing agent reaches 20 times. In this state, the foam extinguishing agent has a low water content, low impact force, and short range, which is suitable for covering fire sources at close range, effectively extinguishing fires and preventing them from reigniting.
[0026] like Figure 3 and Figure 4As shown, the connector assembly includes a first connecting pipe 8, a fixed end 9 of a bend connector, a movable end 10 of a bend connector, a second connecting pipe 11, and a second connector 12. The first connecting pipe 8 is installed at the front end of the primary foaming pipe 2, the fixed end 9 of the bend connector is installed on the first connecting pipe 8, the movable end 10 of the bend connector is installed on the fixed end 9 of the bend connector by bolts 13, the second connecting pipe 11 is installed at the front end of the movable end 10 of the bend connector, and the secondary foaming pipe 3 is installed on the second connecting pipe 11 by the second connector 12.
[0027] The first connecting pipe 8 is threadedly connected to the primary foaming pipe 2 and the fixed end 9 of the bend joint, respectively, and the second joint 12 is threadedly connected to the secondary foaming pipe 3 and the second connecting pipe 11, respectively.
[0028] The movable end 10 of the bend joint can be folded downwards. In this state, the foam extinguishing agent is sprayed out from the fixed end 9 of the bend joint after passing through the foaming tube 2 only once. The foam extinguishing agent is sprayed out directly after being drawn in by negative pressure and foamed. The foam gun in this state has a foaming ratio of 8 times. At this time, the foam extinguishing agent has a high water content, a large impact force, and a long range, making it suitable for quickly suppressing fires.
[0029] Therefore, this foam gun has two working modes: one is low foaming ratio and long range, and the other is medium foaming ratio and short range.
[0030] like Figure 1 , Figure 2 and Figure 5 As shown, two connecting brackets 14 are symmetrically arranged at the rear end of the movable end 10 of the bend joint. The two connecting brackets 14 are located on both sides of the front end of the fixed end 9 of the bend joint. The middle section of the bolt 13 is threaded to the connecting bracket 14, and the tail section of the bolt 13 is inserted into the countersunk hole 15 on the side of the fixed end 9 of the bend joint. The bolt 13 and the countersunk hole 15 are interference fit. The foam extinguishing agent form can be easily and quickly switched according to different fire conditions.
[0031] like Figure 4 As shown, the primary foaming tube 2 is divided into a connecting end 16 and a foaming end 17. The foaming end 17 is located in front of the connecting end 16, and the first air intake hole 5 is located at the foaming end 17. The inner diameter of the foaming end 17 is larger than the inner diameter of the connecting end 16.
[0032] like Figure 4 As shown, a guide tube 18 is provided inside the secondary foaming tube 3. The guide tube 18 is positioned towards the foaming net holder 4. The inner diameter of the secondary foaming tube 3 is larger than the outer diameter of the guide tube 18. The second air intake hole 6 is located outside the guide tube 18.
[0033] like Figure 1 and Figure 3As shown, it also includes a foam rod assembly, which includes a filling cylinder 19 and two reducing connectors 20. The two reducing connectors 20 are respectively installed at both ends of the filling cylinder 19. One of the reducing connectors 20 is connected to the first connector 7. An intercepting net 21 is installed inside the first connector 7. The intercepting net 21 restricts the solid foam rod inside the filling cylinder 19 to prevent the solid foam rod from blocking the flow channel.
[0034] It also includes a second gun body 22, the front end of which is connected to another reducing connector 20, and a third connector 23 is installed at the rear end of the second gun body 22. The first gun body 1 and the second gun body 22 have different diameters, and the diameter of the first gun body 1 is smaller than the diameter of the second gun body 22.
[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A multi-functional foam gun, characterized in that: The device includes a first gun body (1), a primary foaming tube (2), a connector assembly, a secondary foaming tube (3), and a foaming net holder (4). The primary foaming tube (2) is installed at the front end of the first gun body (1), and the secondary foaming tube (3) is installed at the front end of the primary foaming tube (2) through the connector assembly. The foaming net holder (4) is installed at the outlet of the secondary foaming tube (3). The outer wall of the primary foaming tube (2) is surrounded by a plurality of first air intake holes (5), which are perpendicular to the central axis of the primary foaming tube (2). The outer wall of the secondary foaming tube (3) is surrounded by a plurality of second air intake holes (6), which are parallel to the central axis of the secondary foaming tube (3). A first connector (7) is installed at the rear end of the first gun body (1).
2. A multi-functional foam gun according to claim 1, characterized in that: The connector assembly includes a first connecting pipe (8), a fixed end (9) of a bend connector, a movable end (10) of a bend connector, a second connecting pipe (11), and a second connector (12). The first connecting pipe (8) is installed at the front end of the primary foaming pipe (2), the fixed end (9) of the bend connector is installed on the first connecting pipe (8), the movable end (10) of the bend connector is installed on the fixed end (9) of the bend connector by bolts (13), the second connecting pipe (11) is installed at the front end of the movable end (10) of the bend connector, and the secondary foaming pipe (3) is installed on the second connecting pipe (11) by the second connector (12).
3. A multi-functional foam gun according to claim 2, characterized in that: Two connecting brackets (14) are symmetrically arranged at the rear end of the movable end (10) of the turning joint. The two connecting brackets (14) are located on both sides of the front end of the fixed end (9) of the turning joint. The middle section of the bolt (13) is threadedly connected to the connecting bracket (14), and the tail section of the bolt (13) is inserted into the countersunk hole (15) on the side of the fixed end (9) of the turning joint, and the bolt (13) and the countersunk hole (15) are interference fit.
4. A multi-functional foam gun according to claim 1, characterized in that: The primary foaming tube (2) is divided into a connecting end (16) and a foaming end (17). The foaming end (17) is located in front of the connecting end (16), and the first air intake hole (5) is located at the foaming end (17). The inner diameter of the foaming end (17) is larger than the inner diameter of the connecting end (16).
5. A multi-functional foam gun according to claim 1, characterized in that: The secondary foaming tube (3) is provided with a guide tube (18), which is positioned toward the foaming net holder (4). The inner diameter of the secondary foaming tube (3) is larger than the outer diameter of the guide tube (18), and the second air intake hole (6) is located outside the guide tube (18).
6. A multi-functional foam gun according to claim 1, characterized in that: It also includes a foam rod assembly, which includes a filling cylinder (19) and two reducing joints (20). The two reducing joints (20) are respectively installed at both ends of the filling cylinder (19). One of the reducing joints (20) is connected to a first joint (7), and a blocking net (21) is installed inside the first joint (7).
7. A multi-functional foam gun according to claim 6, characterized in that: It also includes a second gun body (22), the front end of which is connected to another reducing connector (20), and a third connector (23) is installed at the rear end of the second gun body (22).