Fire-fighting quick pipe joint

Abstract

The utility model discloses a fire-fighting quick pipe joint which can be used as a pipe joint or a fire-fighting anchor which can be quickly inserted into a male pipe joint. The main pipe joint comprises a main pipe joint and a rolling structure; the female pipe joint is provided with a connecting pipe at the rear section and an inserting pipe at the front section, and the connecting pipe is used for connecting a fire hose; an inserting hole is formed in the front end of the inserting pipe in a concave mode and communicated with the connecting pipe backwards, and a buckling structure is arranged in the inserting hole and used for buckling and positioning when the male pipe connector is inserted. The rolling structure comprises a fixing ring and a plurality of rollers, the fixing ring is sleeved and fixed on the peripheral wall of the inserting pipe, the plurality of rollers are arranged around the fixing ring in a rolling mode, and the rolling face of each roller protrudes out of the outer ring face of the fixing ring. When the fire hose is dragged on the ground, the rolling surface of the roller can roll on the ground, so that the friction and the resistance are reduced, and the operation of a firefighter is more labor-saving.

Description

Technical Field

[0001] This utility model relates to the technical field of fire-fighting quick-connect pipe joints, and in particular to a fire-fighting quick-connect pipe joint for use on fire hoses, which can reduce resistance when the fire hoses are dragged on the ground. Background Technology

[0002] In known fire-fighting equipment technology, fire hoses used for conveying water are typically equipped with different accessories at both ends. One end has a female connector for quick insertion into a male connector of a faucet or other hose, while the other end may have a male connector for inserting a fire anchor. When firefighters drag the fire hose in a fire, this female connector and fire anchor come into direct contact with the ground. Since the female connector and fire anchor are mostly made of metal and are relatively large and heavy, the friction with the ground is significant, resulting in high resistance to movement. This not only hinders the rapid deployment of the hose but also makes the dragging process more strenuous, increasing the operational burden and physical exertion of firefighters. Therefore, there is an urgent need to solve this problem. In addition, the inventor of this utility model has previously proposed a quick-connect pipe joint design (Taiwan Patent Publication No. I828499), which mentions using an elastic retaining ring as the elastic force of the movable fastener, which can improve the shortcomings of the internal fastening structure of known fire hose joints. Utility Model Content

[0003] The main purpose of this utility model is to provide a quick-connect fire hose coupling. By using a female hose coupling design with a rolling structure, it is used to connect to the end of a fire hose. When firefighters drag the hose, the rolling structure can roll smoothly on the ground, effectively reducing frictional resistance and allowing firefighters to drag the fire hose more effortlessly.

[0004] The secondary objective of this utility model is to provide a fire-fighting quick-connect pipe joint. By using an integrally formed female pipe joint structure and an elastic buckle design for the internal snap-fit ​​structure of the female pipe joint, it achieves the advantages of simple and low-cost manufacturing process, quick and convenient assembly process, elastic components that do not quickly lose elasticity and are not easy to break, and the elastic components can be replaced at any time.

[0005] To achieve the above objectives, this utility model proposes a fire-fighting quick-connect pipe joint. A preferred embodiment includes a female pipe joint and a rolling structure. The female pipe joint has a rear connecting pipe and a front insert pipe. The connecting pipe is used to connect a fire hose. The diameter of the insert pipe is larger than the diameter of the connecting pipe. A insertion hole is recessed at the front end of the insert pipe, and this insertion hole connects to the rear connecting pipe. A snap-fit ​​structure is provided within the insertion hole, which is used to engage a male pipe joint when inserted into the insertion hole. The rolling structure has a fixed ring and several rollers. The fixed ring is fixedly sleeved on the outer peripheral wall of the insert pipe of the female pipe joint. The several rollers are rotatably arranged on the fixed ring, and each roller has a rolling surface protruding from the outer surface of the fixed ring. When the female pipe joint is dragged on an object, the rolling surface of the rollers can roll on that object.

[0006] In one of the preferred technical solutions, in the aforementioned fire-fighting quick-connect pipe joint, the front end of the connecting pipe is connected to a sprinkler head, and the female pipe joint and the sprinkler head form a fire-fighting anchor.

[0007] In one of the preferred technical solutions, in the aforementioned fire-fighting quick-connect pipe joint, the fixing ring is fixed to the outer peripheral wall of the insertion pipe by a first threaded structure or a welded structure.

[0008] In one of the preferred technical solutions, the aforementioned fire-fighting quick-connect pipe joint has a fixing ring with multiple radially penetrating grooves through its ring wall, and the roller is disposed in the grooves.

[0009] In one of the preferred technical solutions, the roller in the aforementioned fire-fighting quick-connect pipe joint is a spherical ball or a cylindrical roller.

[0010] In one of the preferred technical solutions, in the aforementioned fire-fighting quick-connect pipe joint, a rubber ring is fitted on the outer peripheral wall of the fixed ring of the rolling structure.

[0011] In one preferred embodiment, the aforementioned fire-fighting quick-connect pipe joint includes a locking ring, at least two movable fasteners, and an elastic retaining ring. The locking ring is engaged with the front end of the connector or the insertion hole. The rear end of the locking ring has two or more positioning protrusions protruding towards the rear end of the insertion hole, and a fastener guide groove formed between each positioning protrusion. The fastener guide groove radially connects the outer and inner annular surfaces of the locking ring. The at least two movable fasteners are radially movable and disposed in each of the fastener guide grooves, for radially protruding from the inner annular surface of the locking ring to engage the male connector, and radially retracting into the fastener guide groove to release the male connector. The elastic retaining ring is an elastic ring with a radially elastic expansion and contraction diameter. The elastic retaining ring surrounds the outer wall surface of the two or more positioning protrusions and the outer surface of the blocks of the at least two movable fasteners to apply elastic pressure towards the center of the locking ring to the outer surface of the movable fasteners.

[0012] In one of the preferred technical solutions, in the aforementioned fire-fighting quick-connect pipe joint, the outer ring surface of the limiting ring is locked together with the inner wall of the insertion hole by a second thread structure.

[0013] In one of the preferred technical solutions, the movable fastener of the aforementioned fire-fighting quick-connect pipe joint has a block and a protrusion formed on the inner side of the block. When the movable fastener moves radially, the protrusion protrudes from the guide groove of the fastener out of the inner ring surface of the limiting ring and can retract back into the guide groove of the fastener.

[0014] In one of the preferred technical solutions, the elastic retaining ring in the above-mentioned fire-fighting quick-connect pipe joint is a coiled spring in which a spring steel wire is spirally wound and the two ends are connected together.

[0015] This utility model provides a quick-connect fire-fighting pipe joint that achieves the following effects:

[0016] (i) The rolling structure design of the outer peripheral wall of the female pipe joint can be used to connect to the end of a fire hose, providing a connection with other male pipe joints. This female pipe joint can be further assembled into a fire anchor for connection with the male pipe joint at the end of the fire hose. When firefighters drag the hose, this rolling structure allows it to roll smoothly on the ground, effectively reducing frictional resistance and allowing firefighters to drag the fire hose with less effort.

[0017] (II) The snap-fit ​​structure of this utility model adopts an elastic retaining ring design, which has the advantages of simple manufacturing and low cost. It can be made into various diameters according to requirements without the need for stamping dies, and the elasticity can be easily adjusted by adjusting the wire diameter or number. This elastic retaining ring enables rapid assembly of the snap-fit ​​structure; only one set of elastic retaining rings is needed to simultaneously push multiple movable fasteners, improving assembly efficiency. Furthermore, this elastic retaining ring is not prone to fatigue or breakage, and can be replaced or its number increased or decreased at any time, maintaining greater flexibility. Attached Figure Description

[0018] The features and advantages of this utility model are described in detail below with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram illustrating the operation of this utility model as a quick-connect pipe joint for fire protection.

[0020] Figure 2 for Figure 1 The diagram shown is an exploded view of a fire-fighting quick-connect pipe joint.

[0021] Figure 3 for Figure 1 The diagram shows a side view of a fire-fighting quick-connect pipe joint.

[0022] Figure 4 for Figure 1The diagram shows a side view of the quick-connect fire hose fitting.

[0023] Figure 5 for Figure 1 An exploded view of the female pipe joint and the fastening structure.

[0024] Figure 6 for Figure 5 An exploded view of the fastening structure.

[0025] Figure 7 for Figure 5 A schematic diagram of the operation of the fastening structure.

[0026] Figure 8 This is an exploded view of the rolling structure in this utility model, where the roller is a roller column.

[0027] Figure 9 This is a schematic diagram illustrating the operation of this utility model as a fire anchor.

[0028] Figure 10 for Figure 9 A three-dimensional schematic diagram of the front end of the fire anchor.

[0029] Explanation of symbols in the attached diagram:

[0030] 100: Fire hose;

[0031] 200: Quick-connect fitting;

[0032] 300: Fire anchor;

[0033] 400: Male pipe connector;

[0034] 401: Push ring;

[0035] 10: Female pipe connector;

[0036] 11: Connecting pipe;

[0037] 12: Insert the connecting pipe;

[0038] 13: Socket;

[0039] 20: Scrolling structure;

[0040] 21: Retaining ring;

[0041] 211: Limiting groove;

[0042] 22: Roller;

[0043] 221: Rolling surface;

[0044] 222: Ball bearing;

[0045] 223: Roller;

[0046] 23: First thread structure;

[0047] 30: Fastening structure;

[0048] 31: Limiting ring;

[0049] 311: Positioning bump;

[0050] 312: Fastener guide groove;

[0051] 32: Active fasteners;

[0052] 321: Block;

[0053] 322: Convex buckle;

[0054] 33: Elastic binding ring;

[0055] 34: Second thread structure;

[0056] 40: Rubber ring;

[0057] 50: Spray head. Detailed Implementation

[0058] The technical features, structure, method steps, and other functions, purposes, and effects of this utility model are described in detail below with reference to the accompanying drawings and embodiments:

[0059] Referring to the accompanying drawings, this utility model provides a quick-connect fire hose coupling, suitable for assembly at the end of a fire hose 100 (e.g., Figure 1 As shown), as a quick-connect pipe fitting 200 for quick insertion with a male pipe fitting 400, or as a fire anchor 300 for quick insertion with a male pipe fitting 400 (as shown). Figure 9 and Figure 10 (As shown). See also Figures 1 to 8 As shown, when this utility model is used as a quick-connect pipe fitting 200, its preferred embodiment includes a female pipe fitting 10 and a rolling structure 20, wherein:

[0060] like Figure 2 and Figure 4As shown, the female pipe connector 10 is a pipe body integrally machined from copper alloy or aluminum alloy, having a rear connecting pipe 11 and a front insert pipe 12. The connecting pipe 11 can specifically be implemented as a barbed fitting for insertion into the end of a known fire hose 100. The diameter of the insert pipe 12 is larger than the diameter of the connecting pipe 11, and its front end has a recessed insertion hole 13, which axially connects to the rear end of the connecting pipe 11. The insertion hole 13 contains a fastening structure 30, which secures a male pipe connector 400 when inserted into the insertion hole 13, preventing the male pipe connector 400 from separating from the quick-connect fitting 200.

[0061] like Figure 2 , Figure 3 and Figure 4 As shown, the rolling structure 20 helps reduce resistance when the female connector 10 is dragged on the ground. A specific embodiment includes a retaining ring 21 and several rollers 22. The retaining ring 21 is fixedly sleeved on the outer peripheral wall of the insertion tube 12 of the female connector 10 and can be fixed to the outer peripheral wall of the insertion tube 12 by a first threaded structure 23 (or a welded structure). The first threaded structure 23, for example, has threads on the inner surface of the retaining ring 21 and the outer peripheral wall of the insertion tube 12, respectively, screwing the two together. The retaining ring 21 has multiple radially penetrating limiting grooves 211 through its ring wall. The several rollers 22 can be circular ball bearings 222. Figure 2 (as shown) or cylindrical roller 223 ( Figure 8 As shown, the rollers 22 are rotatably disposed in the limiting groove 211, such that each roller 22 has a rolling surface 221 protruding from the outer annular surface of the fixing ring 21. Therefore, when the fire hose 100 and the quick-connect fitting 200 are dragged on the ground, the rolling surface 221 of the rollers 22 reduces the friction or resistance between the main fitting 10 and the ground, allowing firefighters to drag the fire hose 100 and the quick-connect fitting 200 with less effort.

[0062] Additionally, see Figure 4 and Figure 5 As shown, a rubber ring 40 can be fitted onto the outer peripheral wall of the insertion tube 12 of the aforementioned female tube connector 10. In one preferred embodiment, the rubber ring 40 is fitted onto the outer peripheral wall of the fixing ring 21 of the rolling structure 20, and the fixing ring 21 and the roller 22 are surrounded and covered, serving as an accessory to prevent impact damage, prevent slippage, and protect the rolling structure 20.

[0063] See Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, a preferred embodiment of the above-mentioned fastening structure 30 includes a limiting ring 31, at least two movable fasteners 32 (three movable fasteners 32 are shown in the figure), and an elastic retaining ring 33. The limiting ring 31 is a circular ring corresponding to the insertion hole 13 and is locked into the front end of the insertion tube 12 or the insertion hole 13 by a second threaded structure 34. The second threaded structure 34 has threads on the outer ring surface of the limiting ring 31 and the inner wall of the insertion hole 13, respectively, so that the two are screwed together. The rear of the limiting ring 31 has two or more positioning protrusions 311 protruding towards the rear end of the insertion hole 13 (three positioning protrusions 311 are shown in the figure), and fastener guide grooves 312 formed between each positioning protrusion 311 (e.g., ...). Figure 6 (as shown), and make the fastener guide groove 312 radially connect the outer ring surface and the inner ring surface of the limiting ring 31.

[0064] The at least two movable fasteners 32 are radially movable and are disposed in each fastener guide groove 312 (e.g., Figure 7 (As shown), it is used to radially protrude from the inner annular surface of the limiting ring 31 to engage with the male pipe connector 400 inserted into the insertion hole 13. The movable fastener 32 can also be engaged by a push ring 401 of the male pipe connector 400 (as shown). Figure 1 As shown, the male connector 400 is pushed and then radially retracted into the fastener guide groove 312 to release it, allowing the male connector 400 to be pulled out in the reverse direction. Figure 6 As shown, more specifically, each of the at least two movable fasteners 32 has an arc-shaped block 321 and an arc-shaped protrusion 322 formed on the inner side of the block 321. The block 321 is disposed in the fastener guide groove 312. When the movable fastener 32 moves radially, the protrusion 322 can protrude from the fastener guide groove 312 out of the inner annular surface of the limiting ring 31 (e.g., Figure 7 (As shown). Conversely, when the male connector 400 is inserted, the front end of the male connector 400 pushes the inclined surface of the buckle 322, causing the buckle 322 to retract into the fastener guide groove 312 in the opposite direction until the male connector 400 is fully inserted. Then, the buckle 322 is secured to the male connector 400 by the elastic force of the elastic retaining ring 33.

[0065] The elastic retaining ring 33 is an elastic ring that can expand and contract radially. Preferably, it is a coiled spring in which a spring steel wire is spirally wound and its two ends are connected together. During assembly, the elastic retaining ring 33 surrounds the outer wall surface of the two or more positioning protrusions 311 and the outer side surface of the at least two movable fasteners 32. Figure 5 and Figure 7 As shown), an elastic pressure is applied to the outer side of the movable fastener 32 toward the center of the limiting ring 31, which can push the protrusion 322 of the movable fastener 32 to fasten the male pipe connector 400.

[0066] See also Figure 9 and Figure 10 The image shows another embodiment of the fire-fighting quick-connect fitting of this utility model, used to form a fire anchor 300. It also has the aforementioned female pipe fitting 10 and a rolling structure 20. Unlike the previous embodiment, the connecting pipe 11 of the female pipe fitting 10 does not need to be implemented as a barbed fitting, but rather as a smooth pipe body. A known sprinkler head 50 is connected to the front end of the connecting pipe 11. The connection structure and style of the sprinkler head 50 are not limited, thereby forming a fire anchor 300 with the female pipe fitting 10 and the sprinkler head 50. When using the fire anchor 300, a male pipe fitting 400 at the end of the fire hose 100 can be inserted into the insertion hole 13 of the female pipe fitting 10 (e.g., ...). Figure 9 As shown, the fire anchor 300 is quickly assembled onto the end of the fire hose 100. When firefighters drag the fire hose and the fire anchor 300, the friction or resistance between the fire anchor 300 and the ground can also be reduced by the rollers 22 of the rolling structure 20, making it easier for firefighters to drag the fire hose 100 and the fire anchor 300.

[0067] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A quick-connect fire hose coupling, characterized in that, Includes a female pipe fitting and a rolling structure, wherein: The female pipe joint has a connecting pipe at the rear end and a plug pipe at the front end. The connecting pipe is used to connect a fire hose. The diameter of the plug pipe is larger than the diameter of the connecting pipe. The front end of the plug pipe has a recessed insertion hole, which connects to the connecting pipe at the rear end. The insertion hole is provided with a fastening structure, which is used to fasten the male pipe joint when it is inserted into the insertion hole. The rolling structure has a fixed ring and several rollers. The fixed ring is fixedly sleeved on the outer peripheral wall of the insertion pipe of the female pipe joint. The several rollers are rotatably arranged on the fixed ring. Each roller has a rolling surface protruding from the outer ring surface of the fixed ring. When the female pipe joint is dragged on an object, the rolling surface of the roller can roll on the object.

2. The fire-fighting quick-connect pipe joint according to claim 1, characterized in that, The front end of the connecting pipe is connected to a sprinkler head, and the main pipe joint and the sprinkler head form a fire anchor.

3. The fire-fighting quick-connect pipe joint according to claim 1 or 2, characterized in that, The retaining ring is fixed to the outer peripheral wall of the insertion tube by a first threaded structure or a welded structure.

4. The fire-fighting quick-connect pipe joint according to claim 3, characterized in that, The retaining ring has multiple radially penetrating grooves through its ring wall, and the roller is disposed in the grooves.

5. The fire-fighting quick-connect pipe joint according to claim 4, characterized in that, The roller is either a spherical ball or a cylindrical roller.

6. The fire-fighting quick-connect pipe joint according to claim 1 or 2, characterized in that, A rubber ring is fitted onto the outer peripheral wall of the fixed ring of the rolling structure.

7. The fire-fighting quick-connect pipe joint according to claim 1 or 2, characterized in that, The fastening structure includes a limiting ring, at least two movable fasteners, and an elastic retaining ring; The limiting ring is attached to the front end of the plug tube or the plug hole. The rear end of the limiting ring has two or more positioning protrusions protruding toward the rear end of the plug hole, and a fastener guide groove is formed between each positioning protrusion. The fastener guide groove is radially connected to the outer ring surface and the inner ring surface of the limiting ring. The at least two movable fasteners are radially movable and are arranged in the fastener guide grooves, for radially protruding from the inner ring surface of the limiting ring to fasten the male pipe joint, and radially retracting into the fastener guide grooves to release the male pipe joint. The elastic retaining ring is an elastic ring capable of radially expanding and contracting its diameter. The elastic retaining ring surrounds the outer wall surface of the two or more positioning protrusions and the outer side surface of the block of the at least two movable fasteners to apply elastic pressure toward the center of the retaining ring to the outer side surface of the movable fasteners.

8. The fire-fighting quick-connect pipe joint according to claim 7, characterized in that, The outer ring surface of the limiting ring is locked to the inner wall of the insertion hole by a second thread structure.

9. The fire-fighting quick-connect pipe joint according to claim 7, characterized in that, The movable fastener has a block and a protruding buckle formed on the inner side of the block. When the movable fastener moves radially, the protruding buckle protrudes from the inner ring surface of the limiting ring from the fastener guide groove and can retract back into the fastener guide groove.

10. The fire-fighting quick-connect pipe joint according to claim 7, characterized in that, The elastic retainer is a coiled spring in which a spring steel wire is spirally wound and the two ends are connected together.

Images