Quick connecting device for fire hose

Abstract

The utility model belongs to the technical field of fire fighting, and particularly relates to a fire hose quick connecting device which comprises a first butt joint pipe and a sealing ring. A second butt-joint pipe is movably installed on one side of the first butt-joint pipe, an inner pipe is fixedly installed on the inner wall of the first butt-joint pipe, a butt-joint assembly is arranged on the inner wall of the first butt-joint pipe, and a first clamping assembly is arranged on the inner wall of the first butt-joint pipe; a second clamping assembly is arranged on the inner wall of the first butt joint pipe. The butt joint assembly comprises a spring and an insertion ring, the spring is fixedly installed on the inner wall of the first butt joint pipe and located on the surface of the inner pipe, the insertion ring is fixedly installed on the side, close to the first butt joint pipe, of the second butt joint pipe, and the insertion ring is movably connected with the first butt joint pipe and the inner pipe in an inserted mode; and through the arrangement of a spring and an insertion ring, the spring can push the insertion ring to enable the insertion ring to always keep an outward force, so that the circular shaft rod can be firmly clamped in the U-shaped groove, and the insertion ring can be in quick butt joint with the first butt joint pipe.

Description

Technical Field

[0001] This utility model belongs to the field of fire protection technology, specifically a quick connection device for fire hoses. Background Technology

[0002] In fire rescue, the "golden time" is calculated in minutes or even seconds. Traditional fire hose connections mostly use threaded interfaces, requiring firefighters to repeatedly rotate, connect, and tighten the seals, with a single connection typically taking over 15 seconds. If multiple hoses need to be connected in series or different equipment needs to be switched (such as transferring a hose from a fire hydrant to a nozzle), the total operation time can reach several minutes. According to statistics from the fire department, delays in water supply caused by connection time can increase the risk of initial fire spread by more than 30%, seriously affecting firefighting efficiency and the success rate of personnel rescue.

[0003] Extreme fire environments such as high temperatures, dense smoke, and strong radiant heat place stringent demands on hose connection devices. Traditional threaded interfaces are prone to thermal deformation and blockage by mud and sand, leading to difficulties in engagement. After the sealing rings age due to heat, the leakage rate at the connection exceeds 20%, causing a sudden drop in water pressure and affecting the range of the water gun. Furthermore, in disaster scenarios such as earthquakes and collapses, firefighters need to work in confined spaces or at heights. Traditional connection methods require delicate hand-eye coordination, posing a risk of fall and being difficult to adapt to complex body position constraints.

[0004] Therefore, this utility model provides a quick connection device for fire hoses. Utility Model Content

[0005] To overcome the shortcomings of the prior art and solve at least one of the problems mentioned in the background art, a quick connection device for fire hoses is proposed.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A quick connection device for fire hoses according to this utility model includes a first pair of connecting pipes and a sealing ring; a second pair of connecting pipes is movably installed on one side of the first pair of connecting pipes; an inner tube is fixedly installed on the inner wall of the first pair of connecting pipes; a docking assembly is provided on the inner wall of the first pair of connecting pipes; a first clamping assembly is provided on the inner wall of the first pair of connecting pipes; a second clamping assembly is provided on the inner wall of the first pair of connecting pipes; the docking assembly includes a spring and a plug ring; the spring is fixedly installed on the inner wall of the first pair of connecting pipes, the spring is located on the surface of the inner tube; the plug ring is fixedly installed on the side of the second pair of connecting pipes close to the first pair of connecting pipes; the plug ring is movably inserted into the first pair of connecting pipes and the inner tube respectively; the spring can push the plug ring to maintain an outward force, so that the round shaft can be firmly locked in the U-shaped groove, and the plug ring can achieve quick docking with the first pair of connecting pipes.

[0007] Preferably, the first clamping assembly includes a U-shaped groove and a round shaft. The U-shaped groove is formed at the top and bottom of the surface of the first pair of connecting pipes, and the round shaft is fixedly installed at the top and bottom of the surface of the insertion ring. The round shaft is movably clamped with the first pair of connecting pipes through the U-shaped groove. In this scheme, the cooperation between the U-shaped groove and the round shaft can quickly strengthen the connection stability of the insertion ring after docking, preventing loosening and falling off.

[0008] Preferably, the second clamping assembly includes an annular groove and a clamping block. The annular groove is formed on the surface of the inner tube, and four sets of clamping blocks are provided. The four sets of clamping blocks are fixedly installed in a ring on the inner wall of the insert ring. The clamping blocks are movably engaged with the inner tube through the annular groove. In this scheme, the cooperation between the annular groove and the clamping block can ensure a stable engagement between the insert ring and the inner tube. Since the inner wall of the inner tube is permeable to water, the engagement between the annular groove and the clamping block can effectively prevent the insert ring from loosening due to water pressure expansion.

[0009] Preferably, the second pair of connecting pipes is fixedly installed with the sealing ring on the side closest to the first pair of connecting pipes. The sealing ring is located on the inner wall of the plug ring. In this design, the sealing ring can prevent water leakage between the inner pipe and the second pair of connecting pipes, and at the same time prevent water from flowing to the spring, ensuring the sealing of the connection.

[0010] Preferably, the inner walls of both the second pair of connecting pipes and the inner pipe are coated with anti-corrosion paint. In this scheme, the application of anti-corrosion paint can prevent corrosion of the inner walls of the inner pipe and the second pair of connecting pipes even after long-term immersion, thereby improving the service life of the pipeline.

[0011] Preferably, both the first and second connectors are coated with a wear-resistant coating. This coating can prevent wear on the first and second connectors during daily training or long-term use, thus extending their service life.

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

[0013] 1. The fire hose quick connection device of this utility model, through the setting of spring and plug ring, enables the spring to push the plug ring to always maintain an outward force, so that the round shaft can be firmly locked in the U-shaped groove, and the plug ring can realize quick docking with the first pair of pipes.

[0014] 2. The fire hose quick connection device of this utility model, through the setting of U-shaped groove and round shaft, enables the U-shaped groove and round shaft to work together to quickly strengthen the connection stability after the insertion ring is connected, and prevent loosening and falling off. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a front perspective view of the present invention;

[0017] Figure 2 This is an exploded view of this utility model;

[0018] Figure 3 This is a sectional view of the present invention;

[0019] Figure 4 yes Figure 2 Enlarged view of a portion of point A in the middle;

[0020] Figure 5 yes Figure 2 Enlarged view of a section at point B in the middle;

[0021] Figure 6 yes Figure 3 Enlarged view of a section at point C;

[0022] Figure 7 yes Figure 3 Enlarged view of a section at point D.

[0023] Legend:

[0024] 1. First pair of connecting pipes; 2. Second pair of connecting pipes; 3. Inner tube; 4. Connecting assembly; 41. Spring; 42. Insert ring; 5. First clamping assembly; 51. U-shaped groove; 52. Round shaft; 6. Second clamping assembly; 61. Annular groove; 62. Clamping block; 70. Sealing ring. Detailed Implementation

[0025] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Specific implementation examples are given below.

[0027] like Figures 1 to 7As shown in the embodiment of this utility model, a quick-connect device for fire hoses includes a first pair of connecting pipes 1 and a sealing ring 70; a second pair of connecting pipes 2 is movably installed on one side of the first pair of connecting pipes 1; an inner tube 3 is fixedly installed on the inner wall of the first pair of connecting pipes 1; a docking assembly 4 is provided on the inner wall of the first pair of connecting pipes 1; a first clamping assembly 5 is provided on the inner wall of the first pair of connecting pipes 1; a second clamping assembly 6 is provided on the inner wall of the first pair of connecting pipes 1; the docking assembly 4 includes a spring 41 and a retaining ring 42; the spring 41 is fixedly installed on the inner wall of the first pair of connecting pipes 1, and the spring 41 is located on the surface of the inner tube 3; the retaining ring 42 is fixedly installed on the side of the second pair of connecting pipes 2 near the first pair of connecting pipes 1, and the retaining ring 42 is movably inserted into the first pair of connecting pipes 1 and the inner tube 3 respectively; the first clamping assembly 5 includes a U-shaped groove 51 and a round shaft. The rod 52 and U-shaped groove 51 are formed at the top and bottom of the surface of the first pair of connecting pipes 1. The round shaft rod 52 is fixedly installed at the top and bottom of the surface of the insert ring 42. The round shaft rod 52 is movably engaged with the first pair of connecting pipes 1 through the U-shaped groove 51. The second clamping assembly 6 includes an annular groove 61 and a locking block 62. The annular groove 61 is formed on the surface of the inner tube 3. Four sets of locking blocks 62 are provided. The four sets of locking blocks 62 are fixedly installed in an annular shape on the inner wall of the insert ring 42. The locking blocks 62 are movably engaged with the inner tube 3 through the annular groove 61. The side of the second pair of connecting pipes 2 closest to the first pair of connecting pipes 1 is fixedly installed with the sealing ring 70. The sealing ring 70 is located on the inner wall of the insert ring 42. The inner walls of the second pair of connecting pipes 2 and the inner tube 3 are coated with anti-corrosion coating. The surfaces of the first pair of connecting pipes 1 and the second pair of connecting pipes 2 are coated with wear-resistant coating.

[0028] like Figures 1 to 7 As shown, the spring 41 can push the insert ring 42 to maintain an outward force, so that the round shaft 52 can be firmly locked in the U-shaped groove 51. The insert ring 42 can achieve quick docking with the first connecting pipe 1. The cooperation between the U-shaped groove 51 and the round shaft 52 can quickly strengthen the connection stability of the insert ring 42 after docking, preventing loosening and falling off. The cooperation between the annular groove 61 and the locking block 62 can make the insert ring 42 and the inner tube 3 securely locked. Since the inner wall of the inner tube 3 is water-permeable, in order to prevent the insert ring 42 from loosening due to water pressure expansion, the annular groove 61 is used to lock the insert ring 42. The engagement of groove 61 and locking block 62 effectively prevents this situation from occurring. The sealing ring 70 prevents water leakage between inner pipe 3 and second pipe 2, and also prevents water from flowing to spring 41, ensuring the sealing of the connection. The application of anti-corrosion coating ensures that the inner walls of inner pipe 3 and second pipe 2 will not corrode even after long-term immersion, thus improving the service life of the pipes. The application of wear-resistant coating prevents wear on first pipe 1 and second pipe 2 during daily training or long-term use, thus extending the service life of first pipe 1 and second pipe 2.

[0029] Working principle: During operation, first align the insertion ring 42 with the gap between the first pair of connecting pipes 1 and the inner tube 3. Then, insert the insertion ring 42 into the inner wall of the first pair of connecting pipes 1. When inserting the insertion ring 42, align the round shaft 52 with the U-shaped groove 51 and the locking block 62 with the annular groove 61. Then, begin insertion. As the insertion ring 42 moves, it will contact and compress the spring 41 until the round shaft 52 and the locking block 62 can no longer move. Next, the user needs to rotate the second pair of connecting pipes 2 so that the round shaft 52 can move to the other side of the U-shaped groove 51, and the locking block 62 will slide to the inner ring of the annular groove 61. At this time, simply release the hand to release the elastic force of the spring 41. The spring 41 will use its elastic force to lock the round shaft 52 into the groove on the other side of the U-shaped groove 51, thus completing the quick connection. If disassembly is required, first push the second pair of connecting pipes 2 to compress the spring 41 to one side with the insertion ring 42, then rotate the second pair of connecting pipes 2 again, and finally pull it out directly.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A quick coupling device for fire hose, comprising a first adapter pipe (1) and a sealing ring (70); characterized in that: The side of the first connecting pipe (1) is movably installed with a second connecting pipe (2), the inner wall of the first connecting pipe (1) is fixedly installed with an inner pipe (3), the inner wall of the first connecting pipe (1) is provided with a connecting assembly (4), and the inner wall of the first connecting pipe (1) is provided with a first clamping assembly (5). The connecting assembly (4) comprises a spring (41) and an insertion ring (42), the spring (41) is fixedly installed on the inner wall of the first connecting pipe (1), the spring (41) is located on the surface of the inner pipe (3), the insertion ring (42) is fixedly installed on the side of the second connecting pipe (2) close to the first connecting pipe (1), and the insertion ring (42) is movably inserted into the first connecting pipe (1) and the inner pipe (3) respectively. The first clamping assembly (5) comprises a U-shaped groove (51) and a circular shaft (52), the U-shaped groove (51) is arranged on the top and bottom of the surface of the first connecting pipe (1), the circular shaft (52) is fixedly installed on the top and bottom of the surface of the insertion ring (42), and the circular shaft (52) is movably clamped with the first connecting pipe (1) through the U-shaped groove (51).

2. A fire hose quick coupling device according to claim 1, characterized in that: The inner wall of the first connecting pipe (1) is provided with a second clamping assembly (6).

3. A fire hose quick coupling device according to claim 2, characterized in that: The second clamping assembly (6) comprises an annular groove (61) and a clamping block (62), the annular groove (61) is arranged on the surface of the inner pipe (3), the clamping block (62) is provided with four groups, the four groups of clamping blocks (62) are fixedly installed on the inner wall of the insertion ring (42) in a ring shape, and the clamping block (62) is movably clamped with the inner pipe (3) through the annular groove (61).

4. A fire hose quick coupling device according to claim 3, characterized in that: The side of the second connecting pipe (2) close to the first connecting pipe (1) is fixedly installed with a sealing ring (70), and the sealing ring (70) is located on the inner wall of the insertion ring (42).

5. A fire hose quick coupling device according to claim 4, characterized in that: The inner wall of the second connecting pipe (2) and the inner wall of the inner pipe (3) are coated with anticorrosive paint.

6. A fire hose quick coupling device according to claim 5, characterized in that: The surfaces of the first connecting pipe (1) and the second connecting pipe (2) are coated with wear-resistant paint.

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