A quick-connect fire hose interface structure

Abstract

This utility model provides a quick-connect fire hose interface structure, including an access pipe, an installation ring shell fixedly connected to the outer side of the access pipe, a limiting ring block slidingly fitted on the inner wall of the installation ring shell, a driving ring fixedly connected to one end of the limiting ring block, an unlocking ring block fixedly connected to one end of the driving ring, and a spring fixedly connected to one side of the inner wall of the installation ring shell. By setting up a snap-fit ​​ring block, a snap-fit ​​mechanism with a trapezoidal snap block, and an unlocking ring block, multiple rotations are not required during connection; simply inserting the hose allows the spring to push the trapezoidal snap block to lock it in place. Unlocking is achieved by moving the unlocking ring block, significantly shortening the connection time and improving the cumbersome, time-consuming, and labor-intensive operation of traditional threaded interfaces. Simultaneously, the trapezoidal snap block and the snap-fit ​​ring block are securely engaged, and the elastic force of the spring can resist external forces generated by sudden increases in water pressure or dragging, overcoming the shortcomings of simple snap-fit ​​structures that are prone to failure and ensuring connection reliability.

Description

Technical Field

[0001] This utility model relates to the field of fire-fighting equipment technology, specifically to a fire hose interface structure that can be quickly connected. Background Technology

[0002] In the field of fire emergency rescue, fire hose couplings are key components connecting fire hoses to water supply equipment and fire hoses to nozzles. Their docking efficiency and connection reliability directly affect the progress of fire fighting and rescue. Currently, the mainstream fire hose couplings are mainly divided into two types: threaded and snap-fit. Threaded couplings achieve connection through multiple turns of the male external thread and the female internal thread, and are widely used in low-pressure water supply scenarios. Snap-fit ​​couplings, on the other hand, complete the docking by using the cooperation of snaps and slots. Compared with threaded couplings, they have a certain improvement in operation speed and are gradually being applied to medium and high-pressure fire fighting operations.

[0003] However, the existing interface structure still has shortcomings: on the one hand, traditional threaded interfaces require both hands to hold the interface and rotate it 3-5 times to lock it, which is cumbersome and time-consuming in emergency rescue; on the other hand, ordinary snap-fit ​​interfaces mostly use a single locking point or a simple steel ball locking structure. When the water pressure in the hose suddenly increases or the hose is dragged by external force, the snap-fit ​​is prone to deformation or disengagement due to overload, resulting in loosening of the interface and water leakage. This not only affects the fire extinguishing efficiency, but may also pose a safety hazard to on-site personnel. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a fire hose interface structure that allows for quick connection, thus solving the problems mentioned in the background section. This utility model features a novel structure. By incorporating a locking ring block, a locking mechanism with a trapezoidal locking block, and an unlocking ring block, connection can be achieved without multiple rotations. Simply insert the hose and the spring-driven trapezoidal locking block will lock it in place. Unlocking is achieved by moving the unlocking ring block, significantly reducing connection time and improving the cumbersome, time-consuming, and labor-intensive operation of traditional threaded interfaces. Simultaneously, the trapezoidal locking block and locking ring block securely engage, and the elastic force of the spring resists external forces generated by sudden increases in water pressure or dragging, overcoming the tendency of simple snap-fit ​​structures to fail and ensuring reliable connection.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fire hose interface structure for quick connection, comprising an access pipe, an installation ring shell fixedly connected to the outer side of the access pipe, a limiting ring block slidably fitted on the inner wall of the installation ring shell, a driving ring fixedly connected to one end of the limiting ring block, an unlocking ring block fixedly connected to one end of the driving ring, a spring fixedly connected to one side of the inner wall of the installation ring shell, a snap-fit ​​ring block fixedly connected to one end of the access pipe, a connecting pipe provided on one side of the access pipe, a connecting shell fitted with the snap-fit ​​ring block installed at the end of the connecting pipe near the access pipe, and multiple mounting grooves evenly formed on the inner circumference of the connecting shell, with a snap-fit ​​mechanism provided inside the mounting groove.

[0006] Furthermore, both the limiting ring block and the unlocking ring block are slidably fitted on the outside of the connecting pipe, one end of the spring abuts against one end of the limiting ring block, one end of the unlocking ring block engages with the locking ring block, and one end of the unlocking ring block is slidably fitted on the inner wall of the connecting shell.

[0007] Furthermore, the locking mechanism includes a sliding plate that slides into the inner wall of the mounting groove, two compression springs are fixedly connected to one side of the sliding plate, and a trapezoidal locking block is fixedly connected to the other side of the sliding plate.

[0008] Furthermore, one end of the compression spring is fixedly connected to one side of the inner wall of the mounting groove, one end of the trapezoidal block is slidably engaged with the inner wall of the mounting groove, the trapezoidal block engages with the snap ring block, and the side of the trapezoidal block near the snap ring block is designed with an inclined surface, and one end of the unlocking ring block engages with the inclined surface of the trapezoidal block.

[0009] Furthermore, a sealing ring is installed on one side of the inner wall of the connecting shell, and a mating groove that cooperates with the sealing ring is opened on one side of the snap-fit ​​ring block.

[0010] Furthermore, L-shaped guide grooves are provided on both sides of the access pipe, and guide rods are fixedly connected to both sides of the inner wall of the unlocking ring block, with the guide rods slidingly engaged with the inner wall of the L-shaped guide groove.

[0011] Furthermore, both the access pipe and the connection pipe have multiple annular protrusions on their outer sides.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model, by setting a snap-fit ​​ring block, a snap-fit ​​mechanism with a trapezoidal snap-fit ​​block, and an unlocking ring block, eliminates the need for multiple rotations during docking. Simply insert the ring block and the spring pushes it to lock the connection. To unlock, the ring block can be moved to separate the parts. This significantly shortens the docking time and improves the problem of cumbersome, time-consuming, and labor-intensive operation of traditional threaded interfaces. At the same time, the trapezoidal snap-fit ​​block and the snap-fit ​​ring block are firmly engaged, and with the elastic force of the spring, they can resist the external force generated by sudden increases in water pressure or dragging. This improves the defect of simple snap-fit ​​structures being prone to failure and ensures the reliability of the connection.

[0014] 2. By setting an L-shaped guide groove and a guide rod, this utility model can accurately limit the movement trajectory of the unlocking ring block, prevent the unlocking ring block from shifting during operation, ensure stable and smooth unlocking action, and avoid its accidental movement from interfering with the locking state, thereby improving the stability of the interface. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a fire hose interface structure that can be quickly connected according to this utility model;

[0016] Figure 2 This is a schematic diagram of the access pipe separation structure of a fire hose interface structure that can be quickly connected according to this utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the installation ring shell of a fire hose interface structure that can be quickly connected according to this utility model.

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the unlocking ring block of a fire hose interface structure that can be quickly connected according to this utility model;

[0019] Figure 5 This is a schematic diagram of the unlocking ring block connection structure of a fire hose interface structure that can be quickly connected according to this utility model;

[0020] Figure 6 This is a schematic diagram of a trapezoidal locking block structure for a fire hose interface structure that can be quickly connected according to this utility model.

[0021] In the diagram: 1. Connecting pipe; 2. Mounting ring housing; 3. Limiting ring block; 4. Drive ring; 5. Unlocking ring block; 6. Spring; 7. Snap-fit ​​ring block; 8. Connecting pipe; 9. Connecting housing; 10. Mounting groove; 11. Snap-fit ​​mechanism; 111. Slide plate; 112. Compression spring; 113. Trapezoidal snap-fit ​​block; 12. Sealing ring; 13. Mating groove; 14. L-shaped guide groove; 15. Guide rod; 16. Annular protrusion. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Please refer to Figures 1 to 6 This utility model provides a technical solution: a fire hose interface structure that can be quickly connected, including an access pipe 1, an installation ring shell 2 fixedly connected to the outer side of the access pipe 1, a limiting ring block 3 slidably fitted on the inner wall of the installation ring shell 2, a driving ring 4 fixedly connected to one end of the limiting ring block 3, an unlocking ring block 5 fixedly connected to one end of the driving ring 4, a spring 6 fixedly connected to one side of the inner wall of the installation ring shell 2, a snap-fit ​​ring block 7 fixedly connected to one end of the access pipe 1, a connecting pipe 8 provided on one side of the access pipe 1, a connecting shell 9 that cooperates with the snap-fit ​​ring block 7 installed on the end of the connecting pipe 8 near the access pipe 1, a plurality of installation grooves 10 evenly opened on the inner circumference of the connecting shell 9, and a snap-fit ​​mechanism 11 provided inside the installation grooves 10. The limiting ring block 3 and the unlocking ring block 5 are both slidably fitted on the outer side of the access pipe 1, one end of the spring 6 abuts against one end of the limiting ring block 3, one end of the unlocking ring block 5 cooperates with the snap-fit ​​ring block 7, and one end of the unlocking ring block 5 is slidably fitted on the inner wall of the connecting shell 9. During docking, the snap-fit ​​ring 7 of the access pipe 1 is aligned with the connecting shell 9 of the connecting pipe 8 and inserted. The spring 6 inside the mounting ring shell 2 always presses against the limiting ring 3. The drive ring 4 and the unlocking ring 5 remain in their initial positions to prevent the unlocking ring 5 from interfering with the snap-fit ​​prematurely. This process uses the cooperation and positioning between the access pipe 1 and the connecting shell 9 to lay the foundation for the subsequent locking of the snap-fit ​​mechanism 11. At the same time, the sliding cooperation relationship of the mounting ring shell 2, the limiting ring 3 and other structures ensures smooth movement of each component and initially improves the convenience of docking.

[0024] In this embodiment, the locking mechanism 11 includes a sliding plate 111 that slides into the inner wall of the mounting groove 10. Two compression springs 112 are fixedly connected to one side of the sliding plate 111, and a trapezoidal locking block 113 is fixedly connected to the other side of the sliding plate 111. One end of the compression spring 112 is fixedly connected to one side of the inner wall of the mounting groove 10, and one end of the trapezoidal locking block 113 slides into the inner wall of the mounting groove 10. The trapezoidal locking block 113 engages with the locking ring block 7, and the side of the trapezoidal locking block 113 near the locking ring block 7 is designed with a slope. One end of the unlocking ring block 5 engages with the slope of the trapezoidal locking block 113. When the snap-fit ​​ring 7 is inserted into the connecting shell 9, its outer wall presses against the inclined surface of the trapezoidal snap-fit ​​block 113, pushing the sliding plate 111 to compress the spring 112, causing the trapezoidal snap-fit ​​block 113 to retract into the mounting groove 10. When the snap-fit ​​ring 7 is fully inserted, the spring 112 returns to its original position and pushes the sliding plate 111, allowing the trapezoidal snap-fit ​​block 113 to snap into one side of the snap-fit ​​ring 7, thus completing the locking. When unlocking, the unlocking ring 5 is moved, and one end of it presses against the inclined surface of the trapezoidal snap-fit ​​block 113, causing the trapezoidal snap-fit ​​block 113 to disengage from the snap-fit ​​ring 7, achieving rapid separation. The inclined surface design of the trapezoidal snap-fit ​​block 113 and the elastic action of the spring 112 ensure that the docking and locking are stable and the unlocking is convenient, solving the problem of cumbersome operation of traditional interfaces.

[0025] In this embodiment, a sealing ring 12 is installed on one side of the inner wall of the connecting shell 9, and a mating groove 13 that mates with the sealing ring 12 is provided on one side of the snap-fit ​​ring block 7. L-shaped guide grooves 14 are provided on both sides of the inlet pipe 1, and guide rods 15 are fixedly connected to both sides of the inner wall of the unlocking ring block 5, with the guide rods 15 slidingly engaged with the inner wall of the L-shaped guide grooves 14. Multiple annular protrusions 16 are provided on the outer sides of both the inlet pipe 1 and the connecting pipe 8. After the snap-fit ​​ring 7 and the connecting shell 9 are in place, the sealing ring 12 inside the connecting shell 9 is embedded in the mating groove 13 of the snap-fit ​​ring 7 to form an effective seal and prevent water leakage. The L-shaped guide grooves 14 on both sides of the connecting pipe 1 cooperate with the guide rod 15 of the unlocking ring 5 to limit the movement trajectory of the unlocking ring 5 and prevent it from deviating and affecting the unlocking or locking effect. At the same time, the unlocking ring 5 is limited to prevent it from moving when dragged, which could lead to accidental unlocking. The annular protrusions 16 on the outside of the connecting pipe 1 and the connecting pipe 8 enhance the friction with the water hose and prevent the water hose from falling off. These structures together improve the sealing, stability and connection reliability of the interface.

[0026] When using the device, align the snap-fit ​​ring 7 of the connecting pipe 1 with the connecting shell 9 of the connecting pipe 8 and insert it. The snap-fit ​​ring 7 presses against the inclined surface of the trapezoidal snap-fit ​​block 113, causing the trapezoidal snap-fit ​​block 113 to retract into the mounting groove 10. At the same time, the spring 6 inside the mounting ring shell 2 maintains the initial positions of the limiting ring 3, the driving ring 4, and the unlocking ring 5. When the snap-fit ​​ring 7 is fully inserted, the compression spring 112 pushes the sliding plate 111, causing the trapezoidal snap-fit ​​block 113 to lock the snap-fit ​​ring 7, thus completing the locking. At this time, the sealing ring 12 is embedded in the mating groove 13 to achieve a seal. When unlocking, rotate the driving ring 4 and then move the unlocking ring 5. One end of the unlocking ring 5 presses against the inclined surface of the trapezoidal snap-fit ​​block 113, causing the trapezoidal snap-fit ​​block 113 to disengage from the snap-fit ​​ring 7. At the same time, the guide rod 15 slides along the L-shaped guide groove 14 to ensure the stable movement of the unlocking ring 5. Finally, pull out the connecting pipe 1 to complete the separation. The entire process does not require multiple rotations, and the locking is stable and the sealing is reliable, meeting the needs of fire emergency response.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

[0028] 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 fire hose interface structure that can be quickly connected, comprising an access pipe (1), characterized in that: An installation ring shell (2) is fixedly connected to the outer side of the access pipe (1). A limiting ring block (3) is slidably fitted on the inner wall of the installation ring shell (2). A driving ring (4) is fixedly connected to one end of the limiting ring block (3). An unlocking ring block (5) is fixedly connected to one end of the driving ring (4). A spring (6) is fixedly connected to one side of the inner wall of the installation ring shell (2). A snap-fit ​​ring block (7) is fixedly connected to one end of the access pipe (1). A connecting pipe (8) is provided on one side of the access pipe (1). A connecting shell (9) that cooperates with the snap-fit ​​ring block (7) is installed on the end of the connecting pipe (8) near the access pipe (1). A plurality of installation grooves (10) are evenly opened on the inner circumference of the connecting shell (9). A snap-fit ​​mechanism (11) is provided inside the installation groove (10).

2. The fire hose interface structure for quick connection according to claim 1, characterized in that: The limiting ring block (3) and the unlocking ring block (5) are both slidably fitted on the outside of the access pipe (1). One end of the spring (6) abuts against one end of the limiting ring block (3), one end of the unlocking ring block (5) is fitted with the snap-fit ​​ring block (7), and one end of the unlocking ring block (5) is slidably fitted on the inner wall of the connecting shell (9).

3. The fire hose interface structure for quick connection according to claim 1, characterized in that: The snap-fit ​​mechanism (11) includes a slide plate (111) that slides into the inner wall of the mounting groove (10). Two compression springs (112) are fixedly connected to one side of the slide plate (111), and a trapezoidal snap-fit ​​block (113) is fixedly connected to the other side of the slide plate (111).

4. The fire hose interface structure for quick connection according to claim 3, characterized in that: One end of the compression spring (112) is fixedly connected to one side of the inner wall of the mounting groove (10), and one end of the trapezoidal locking block (113) is slidably fitted on the inner wall of the mounting groove (10). The trapezoidal locking block (113) is engaged with the locking ring block (7), and the side of the trapezoidal locking block (113) near the locking ring block (7) is designed with an inclined surface. One end of the unlocking ring block (5) is engaged with the inclined surface of the trapezoidal locking block (113).

5. The fire hose interface structure for quick connection according to claim 1, characterized in that: A sealing ring (12) is installed on one side of the inner wall of the connecting shell (9), and a mating groove (13) that mates with the sealing ring (12) is provided on one side of the snap ring block (7).

6. The fire hose interface structure for quick connection according to claim 1, characterized in that: Both sides of the access pipe (1) are provided with L-shaped guide grooves (14), and both sides of the inner wall of the unlocking ring block (5) are fixedly connected with guide rods (15), and the guide rods (15) slide in the inner wall of the L-shaped guide grooves (14).

7. The fire hose interface structure for quick connection according to claim 1, characterized in that: The outer sides of both the access pipe (1) and the connection pipe (8) are provided with multiple annular protrusions (16).

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