Quick-connecting water gun interface for fire fighting

Abstract

This utility model discloses a quick-connect water gun interface for fire fighting, including a male connector and a female connector. The male connector has a radial locking protrusion and a sealing ring at its connecting end. The female connector has a guide groove on the inner wall of its insertion cavity, which consists of an axial insertion section and a circumferential locking section. The end of the circumferential locking section has a limit stop surface. The female connector has an elastic locking mechanism. During connection, the male connector is inserted into the female connector, and the locking protrusion enters along the axial insertion section. By rotating the male connector, the locking protrusion slides into the end of the circumferential locking section and abuts against the limit stop surface. The elastic locking mechanism locks the connection, and the sealing ring is pressed and sealed. This utility model can complete a quick and secure connection and seal with only two steps: "insertion-rotation". It is simple and quick to operate, reliable and prevents loosening, significantly improving the efficiency of fire fighting operations, and is especially suitable for emergency fire fighting scenarios.

Description

Technical Field

[0001] This utility model relates to the field of fire-fighting equipment technology, specifically to a quick-connect water gun interface for fire fighting. Background Technology

[0002] In firefighting operations, the connection speed between equipment such as hoses, nozzles, and fire hydrants is crucial and directly affects firefighting efficiency; traditional fire hose connections mostly use internal thread or threaded connections. The snap-fit ​​interface requires aligning the lugs and grooves of the two interfaces, pushing them in firmly, and rotating them at a certain angle to lock them in place. This operation requires some skill and strength; in an emergency, panicked situation, or while wearing gloves, alignment and rotation may not be smooth, and the process may be time-consuming. Threaded interfaces: require multiple turns to tighten, resulting in slow connection speed, and are prone to loosening or stripping under the impact of high-pressure water flow, posing a safety hazard; Existing quick-connect interfaces: Some quick-connect interfaces use snap-fit ​​or pull ring types, but their structure may be more complex, their reliability or sealing performance needs to be improved, or there is a risk of accidental disengagement under high pressure; Application number CN202222052597.7 proposed "a quick-connect water gun body" which relies on the frictional force of hose deformation and is prone to material fatigue failure in high-pressure firefighting scenarios. Therefore, there is an urgent need for a fire-fighting quick-connect interface that is simpler and faster to operate, has a firm and reliable connection, good sealing performance, and is not easy to accidentally detach. Utility Model Content

[0003] The purpose of this utility model is to provide a quick-connect water gun interface for fire fighting in order to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, this utility model specifically adopts the following technical solution: This utility model proposes a quick-connect water gun interface for fire fighting, including a male connector and a female connector; One end of the male connector is used to connect a fire hose, water gun, or fire hydrant, and the other end is provided with a connecting end; on the outer circumferential surface of the connecting end, at least two radially outward protruding locking protrusions are evenly distributed along the circumference; a sealing ring groove is provided on the end face or the outer circumference near the end face of the connecting end, and a sealing ring is installed in the groove. One end of the female connector is used to connect a fire hose, water gun, or fire hydrant, and the other end is provided with a plug-in cavity that is adapted to the connection end of the male connector; the inner wall of the plug-in cavity is provided with guide grooves corresponding to the number and position of the locking protrusions of the male connector, and the female connector is provided with an elastic locking mechanism. As a preferred embodiment of this utility model, the number of the locking protrusions and guide grooves is 2, 3 or 4, and they are symmetrically distributed.

[0005] As a preferred embodiment of this utility model, the rotation angle of the circumferential locking section is 30°-45°.

[0006] As a preferred technical solution of this utility model, the outer shells of the male and female connectors are provided with anti-slip textures or raised ridges.

[0007] As a preferred technical solution of this utility model, the guide groove inlet of the female connector is provided with an inlet inclined surface or a chamfer.

[0008] As a preferred embodiment of this utility model, the number of elastic locking mechanisms is at least one, and they are symmetrically distributed in the direction of rotational force of the locking protrusion. The elastic locking mechanism includes an L-shaped slider and a spring.

[0009] As a preferred embodiment of this utility model, the L-shaped slider and the contact surface of the locking protrusion have an inclined angle.

[0010] The beneficial effects of this utility model are as follows: 1. Extremely fast connection speed: Simply insert the male connector into the female connector and rotate it slightly to complete the connection and locking. The action is simple and smooth, several times faster than traditional threaded and internal snap connections, making it especially suitable for emergency situations in fire scenes.

[0011] 2. Simple and reliable operation: After insertion, only a small rotation is needed. There is no need to precisely align multiple lugs or rotate multiple times. It can be easily completed even when wearing gloves or in poor visibility, reducing the difficulty of operation and the error rate.

[0012] 3. Simple and durable structure: The overall structure is relatively simple with few parts, making it easy to process and manufacture, with low cost, and it is sturdy and durable, making it suitable for harsh fire-fighting environments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the male connector; Figure 3 This is a schematic diagram of the elastic locking mechanism.

[0014] Reference numerals: 1. Male connector; 2. Female connector; 11. Locking protrusion; 12. Sealing ring groove; 13. Sealing ring; 22. Guide groove; 23. Elastic locking mechanism; 232. L-shaped slider; 231. Spring. Detailed Implementation

[0015] like Figures 1 to 3 As shown, this utility model proposes: a quick-connect water gun interface for fire fighting, including a male connector and a female connector; One end of the male connector is used to connect a fire hose, water gun, or fire hydrant, and the other end is provided with a connecting end; on the outer circumferential surface of the connecting end, at least two radially outward protruding locking protrusions are evenly distributed along the circumference; a sealing ring groove is provided on the end face or the outer circumference near the end face of the connecting end, and a sealing ring is installed in the groove. One end of the female connector is used to connect to a fire hose, fire nozzle, or fire hydrant, and the other end is provided with a plug-in cavity adapted to the connection end of the male connector; the inner wall of the plug-in cavity is provided with guide grooves corresponding to the number and position of the locking protrusions of the male connector; the female connector is provided with an elastic locking mechanism.

[0016] The number of locking protrusions and guide grooves is 2, 3 or 4, and they are symmetrically distributed.

[0017] The rotation angle of the circumferential locking section is 30°-45°.

[0018] The outer shells of the male and female connectors are provided with anti-slip textures or raised ridges.

[0019] The female connector has an inlet ramp or chamfer at the guide groove entrance.

[0020] The number of elastic locking mechanisms is at least one, and they are symmetrically distributed in the direction of rotational force of the locking protrusion. The elastic locking mechanism includes an L-shaped slider and a spring.

[0021] The L-shaped slider has an inclined angle on the contact surface with the locking protrusion.

[0022] Working principle: This interface achieves quick connection through the cooperation of the male connector locking protrusion and the female connector guide groove. First, insert the male connector axially into the female connector insertion cavity, so that the protrusion slides into the axial insertion section of the guide groove; then rotate the male connector 30°-45°, and the protrusion moves along the circumferential locking section to the end limiting surface. At this time, the sealing ring is axially compressed to form a high-pressure seal; at the same time, the elastic locking mechanism automatically engages into the protrusion groove to complete the double mechanical locking, which is impact-resistant and prevents loosening; when disassembling, pull the unlocking mechanism and rotate it in the opposite direction to separate. Example 1

[0023] The left end of the male connector is a standard water hose interface thread, and the right end is a connecting end; two radially outward protruding locking protrusions are symmetrically provided on the outer circumference of the connecting end; an annular sealing groove is opened on the end face of the connecting end, and a rubber sealing ring is installed in the groove. The left end of the female connector has a standard water gun interface thread, and the right end has a insertion cavity. Two guide grooves are symmetrically opened on the inner wall of the insertion cavity. Each guide groove consists of an axial insertion section and a circumferential locking section. The axial insertion section extends axially long enough for the locking protrusion to insert. The circumferential locking section is located at the end of the axial insertion section and extends clockwise by approximately 35°. The end of the circumferential locking section forms a limiting stop surface perpendicular to the direction of rotation. Inside the wall of the female connector, corresponding to the position where the locking protrusion rotates into place, there is a radial hole. A spring and an L-shaped slider are installed inside the hole, forming an elastic locking mechanism. Align the male connector's end with the female connector's insertion cavity and insert it. The male connector's locking protrusion slides into the axial insertion section of the female connector's guide groove. When the male connector is fully inserted, rotate it clockwise approximately 35°. The locking protrusion then slides into the circumferential locking section of the guide groove until it abuts against the limit stop surface. Upon reaching the final position, the L-shaped slider springs out under spring pressure and engages with the side of the locking protrusion, achieving a secondary lock and preventing reverse loosening. Forcefully move the L-shaped slider to overcome the spring force and retract it, releasing the lock on the locking protrusion. Then, rotate the male connector in the opposite direction approximately 35° to retract the locking protrusion from the circumferential locking section to the axial insertion section, allowing the male connector to be removed from the female connector.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A quick coupling nozzle interface for fire fighting, characterized by: Includes male connector (1) and female connector (2); One end of the male connector (1) is used to connect a fire hose, water gun or fire hydrant, and the other end is provided with a connecting end; on the outer circumferential surface of the connecting end, at least two radially outward protruding locking protrusions (11) are evenly distributed in the circumferential direction; a sealing ring groove (12) is provided on the end face or the outer circumference near the end face of the connecting end, and a sealing ring (13) is installed in the groove. One end of the female connector (2) is used to connect a fire hose, water gun, or fire hydrant, and the other end is provided with a plug-in cavity that is compatible with the connection end of the male connector (1); the inner wall of the plug-in cavity is provided with a guide groove (22) corresponding to the number and position of the locking protrusions (11) of the male connector (1); the female connector (2) is provided with an elastic locking mechanism (23).

2. A quick coupling nozzle interface for fire fighting according to claim 1, characterized in that: The number of the locking protrusions (11) and guide grooves (22) is 2, 3 or 4, and they are symmetrically distributed.

3. The quick coupling water gun connector for fire fighting according to claim 1, characterized in that: The outer shells of the male connector (1) and the female connector (2) are provided with anti-slip textures.

4. The quick coupling water gun connector for fire fighting according to claim 1, characterized in that: The female connector (2) has an inlet ramp or chamfer at the entrance of the guide groove (22).

5. The quick coupling water gun connector for fire fighting according to claim 1, characterized in that: The number of elastic locking mechanisms (23) is at least one, and they are symmetrically distributed in the rotational force direction of the locking protrusion (11). The elastic locking mechanism (23) includes an L-shaped slider (232) and a spring (231).

6. A quick connect lance coupling for fire fighting equipment according to claim 5, characterised in that: The L-shaped slider (232) has an inclined angle on the contact surface with the locking protrusion (11).

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