Anti-falling fire hose coupling

Abstract

The utility model relates to a kind of anti-falling fire-fighting lance joint, belong to fire-fighting equipment technical field;Including ratchet lock ring, bidirectional elastic pusher and unlocking slider, when the water hose connecting end is inserted into the lance connecting end, rotate ratchet lock ring to make the end of bidirectional elastic pusher be inserted into ratchet pawl ring tooth slot, form mechanical interlock;When unlocking, one-hand presses unlocking slider, its inside wedge push rod extrudes pusher root, forces pusher elastic deformation to separate tooth slot, ratchet lock ring can be freely rotated to realize separation at this time;When water pressure is greater than 0.5MPa, conical sealing ring expands radially and enhances sealing, leakage rate is less than 0.1L / min;Protective flange covers 80% exposed part of ratchet lock ring, and 15J impact resistance is impacted, suitable for fire-fighting water hose quick connection, solve the industry pain point of traditional joint operation slow, easy to fall off, high risk of accidental touch.

Description

Technical Field

[0001] This utility model relates to the field of fire-fighting equipment technology, and discloses a fire hose coupling that prevents detachment. Background Technology

[0002] Unlocking operations during high-voltage work are cumbersome and delay rescue time.

[0003] Traditional latches are easily unlocked by external impact.

[0004] Seals are at high risk of failure under vibration.

[0005] The existing patent number CN202420816736.5 proposes "an anti-detachment hand clip for water guns". Due to the lack of special design, the clip may detach, posing a risk of firefighters accidentally unlocking it while moving. Utility Model Content

[0006] The purpose of this utility model is to provide a fire hose coupling that prevents detachment in order to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0008] This utility model proposes an anti-detachment fire hose connector, including a hose connection end and a fire hose connection end, and also includes a ratchet locking ring, a two-way elastic lever and an unlocking slider. The outer wall of the fire hose connection end is provided with a pawl ring.

[0009] The ratchet locking ring is located outside the water gun connection end and is in clearance fit with the pawl ring.

[0010] The bidirectional elastic paddle is fixedly connected to the inner wall of the ratchet lock ring and is symmetrically distributed on both radial sides of the ratchet lock ring. Under normal conditions, its end is engaged in the pawl ring tooth groove.

[0011] The unlocking slider is slidably sleeved on the outside of the ratchet lock ring, and a wedge-shaped push rod is provided on its inner side. The wedge-shaped push rod corresponds to the root position of the bidirectional elastic lever.

[0012] When the unlocking slider slides axially, the wedge-shaped push rod presses against the root of the bidirectional elastic paddle, causing the end of the paddle to disengage from the pawl ring tooth groove.

[0013] As a preferred technical solution of this utility model, the bidirectional elastic paddle is fixed to the inner wall of the ratchet lock ring by riveting or laser welding, and the angle between the root of the paddle and the inner wall of the ratchet lock ring is 85°-90°.

[0014] As a preferred technical solution of this utility model, the sliding direction of the unlocking slider is parallel to the buckle axis, and its slide length is 1.3-1.8 times greater than the slider stroke.

[0015] As a preferred embodiment of this utility model, the inclined angle of the wedge-shaped push rod is 12°-18°, and the normal distance between the end of the push rod and the root of the bidirectional elastic paddle is 0.3-0.8mm.

[0016] As a preferred technical solution of this utility model, the slide of the unlocking slider is provided with protective flanges on both sides, and the height of the flanges is greater than 1.5 times the slider stroke.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. Improved operational efficiency: unlocking in 3 seconds with one hand; 98% success rate for blind operation while wearing gloves; and 60% faster response time in a fire.

[0019] 2. Reliable anti-fall-off mechanism, with a compressive strength of up to 2.0MPa, and zero loosening under vibration conditions.

[0020] 3. Prevents accidental touches and is resistant to collisions and impacts, reducing the accidental unlocking rate to <0.5%. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the ratchet locking ring.

[0023] Reference numerals: 1. Water hose connection end; 2. Water gun connection end; 3. Ratchet lock ring; 4. Two-way elastic lever; 5. Unlocking slider; 51. Wedge push rod.

[0024] like Figures 1 to 2 As shown, this utility model proposes: an anti-detachment fire hose coupling, including a hose connection end and a hose nozzle connection end, and also includes a ratchet locking ring, a two-way elastic lever and an unlocking slider, wherein the outer wall of the hose nozzle connection end is provided with a pawl ring;

[0025] The ratchet locking ring is located outside the water gun connection end and is in clearance fit with the pawl ring.

[0026] The bidirectional elastic paddle is fixedly connected to the inner wall of the ratchet lock ring and is symmetrically distributed on both radial sides of the ratchet lock ring. Under normal conditions, its end is engaged in the pawl ring tooth groove.

[0027] The unlocking slider is slidably sleeved on the outside of the ratchet lock ring, and a wedge-shaped push rod is provided on its inner side. The wedge-shaped push rod corresponds to the root position of the bidirectional elastic lever.

[0028] When the unlocking slider slides axially, the wedge-shaped push rod presses against the root of the bidirectional elastic paddle, causing the end of the paddle to disengage from the pawl ring tooth groove.

[0029] The bidirectional elastic paddle is fixed to the inner wall of the ratchet lock ring by riveting or laser welding, and the angle between the root of the paddle and the inner wall of the ratchet lock ring is 85°-90°.

[0030] The sliding direction of the unlocking slider is parallel to the buckle axis, and its slide length is 1.3-1.8 times greater than the slider stroke.

[0031] The wedge-shaped push rod has an inclination angle of 12°-18°, and the normal distance between the end of the push rod and the root of the bidirectional elastic paddle is 0.3-0.8mm.

[0032] The unlocking slider has protective flanges on both sides of its slide rail, and the flange height is 1.5 times greater than the slider stroke.

[0033] Working principle:

[0034] When the hose connection is inserted into the water gun connection, the rotating ratchet locking ring causes the end of the bidirectional elastic lever to engage with the pawl ring tooth groove, forming a mechanical interlock. The high-pressure water flow pushes the conical sealing ring to expand radially, achieving a water pressure self-tightening seal. To unlock, press down on the unlocking slider with one hand. The wedge-shaped push rod on its inner side squeezes the root of the lever, forcing the lever to elastically deform and disengage from the tooth groove. At this time, the ratchet locking ring can rotate freely to achieve separation. The entire process uses the ratchet-lever meshing to self-reinforce and resist water pressure impact, and utilizes the force conversion of the push rod's inclined plane (downward pressure → radial deformation force) to achieve quick one-handed unlocking. Detailed Implementation Example 1

[0035] This embodiment provides an anti-detachment fire hose coupling. The hose connection end is made of cast copper alloy and machined with a 30-tooth involute ratchet ring. The ratchet locking ring is precision forged from 304 stainless steel, and its inner wall is riveted with a 65Mn spring steel bidirectional pawl. The unlocking slider is injection molded from POM + 20% glass fiber. The inner 15° inclined push rod is normally 0.5mm away from the root of the pawl. After assembly, it is measured that it only takes 2.8 seconds to unlock with one hand. Under 2.0MPa water pressure, the locking engagement depth increases by 0.18mm and the leakage rate is <0.1L / min. It has passed the -40℃ freezing and 200,000 cycle test. The protective flange can resist collision impact and achieve zero accidental unlocking.

[0036] 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.

[0037] 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 coupling to prevent detachment, comprising a hose connection end (1) and a fire hose connection end (2), characterized in that: It includes a ratchet locking ring (3), a two-way elastic lever (4), and an unlocking slider (5); The ratchet locking ring (3) is located outside the water gun connection end (2); The bidirectional elastic paddle (4) is fixedly connected to the inner wall of the ratchet lock ring (3) and is symmetrically distributed on both radial sides of the ratchet lock ring (3). Under normal conditions, its end is inserted into the ratchet ring tooth groove. The unlocking slider (5) is slidably sleeved on the outside of the ratchet lock ring (3), and a wedge-shaped push rod (51) is provided on its inner side. The wedge-shaped push rod (51) corresponds to the root position of the bidirectional elastic paddle (4).

2. The anti-detachment fire hose coupling according to claim 1, characterized in that: When unlocking, as the unlocking slides axially, the wedge push rod (51) presses against the root of the bidirectional elastic paddle (4), causing the end of the bidirectional elastic paddle (4) to disengage from the tooth groove of the ratchet lock ring (3).

3. The anti-detachment fire hose coupling according to claim 1, characterized in that: The bidirectional elastic paddle (4) is fixed to the inner wall of the ratchet lock ring (3) by laser welding, and the angle between the root of the paddle and the inner wall of the ratchet lock ring (3) is 85°-90°.

4. The anti-detachment fire hose coupling according to claim 1, characterized in that: The sliding direction of the unlocking slider (5) is parallel to the buckle axis, and its slide length is 1.3-1.8 times greater than the slider stroke.

5. The anti-detachment fire hose coupling according to claim 1, characterized in that: The inclined angle of the wedge-shaped push rod (51) is 12°-18°, and the normal distance between the end of the push rod and the root of the bidirectional elastic lever (4) is 0.3-0.8mm.

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