CN103791187A - Fire coupling - Google Patents

Abstract

The invention discloses a fire-fighting interface, which comprises a left interface and a right interface. The end surface of the left interface is evenly distributed with left claws along the circumferential direction, and the left claw extends axially from the end surface for a section and then bends to form a claw-shaped hook groove; The end face of the right interface is evenly distributed with right claws along the circumferential direction, and the right claw extends axially from the end face for a section and then bends to form a claw-shaped hook groove, wherein the bending directions of the left and right claws are opposite; the left and right claws are locked together to form Fire interface. The advantages of the present invention are: the buckle claws are evenly distributed along the circumference of the interface, the quantity is large, the fire-fighting interface formed by buckling has high strength, is not easy to break, can withstand the impact of high-strength water supply pressure, and can meet the popularization and application of high-power fire-fighting water tank vehicle equipment; This fire-fighting interface has a lock, which can prevent the claws from loosening after fastening, and will not cause tripping; the size of this fire-fighting interface can be adjusted arbitrarily, and is more suitable for large-caliber connecting parts.

Description

Fire interface

technical field

The invention relates to an interface, in particular to an interface for fire protection.

Background technique

The fire-fighting interface is mainly used for the connection between the hose, fire hydrant and water gun, etc., to carry out the fire-fighting work of transporting water or mixed liquid. Existing fire-fighting interfaces are mainly divided into inner buckle type and buckle type according to the buckle connection method. At present, the following defects generally exist in the fire-fighting interface: the interface is poor in strength, easy to break, and cannot withstand the impact of high-intensity water supply pressure; the interface after buckling is easy to disengage during use, and there is no self-locking device.

Contents of the invention

Purpose of the invention: The purpose of the invention is to provide a high-strength anti-drop fire-fighting interface.

Technical solution: The fire-fighting interface of the present invention includes a left interface and a right interface. The end face of the left interface is evenly distributed with left claws along the circumference. ; The end face of the right interface is uniformly distributed with right claws along the circumferential direction, and the right claw extends axially from the end face for a section and then bends to form a claw-shaped hook groove, wherein the bending directions of the left and right claws are opposite; the left and right claws are mutually locked Combined to form a fire protection interface.

Wherein, the left and right interfaces are evenly provided with reinforcing ribs in the circumferential direction.

The left and right interfaces are provided with ferrules, and the left and right buckle claws are arranged on the end faces of the ferrules and integrally formed with the ferrules.

Corresponding to the axial direction of each pair of buckle claws, the hoop is equipped with retractable lock buckles that can prevent the left and right buckle claws from loosening after fastening.

The lock buckle is a cylinder with a large diameter in the front section and a small diameter in the rear section. The holes for installing the lock buckle on the ferrule correspond to the diameters of the front and rear sections of the lock buckle, and the length of the hole with a large diameter is greater than the length of the large diameter section of the lock buckle. , the locking lever of the small diameter section of the locking buckle is covered with a spring that controls the locking buckle expansion and contraction, and a limit pin is radially provided at the small diameter end of the locking buckle extending out of the hoop.

The working end surface of the lock buckle is an inclined surface.

The limit pin is a handle.

Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. The clasps of the fire-fighting interface are evenly distributed along the circumference of the interface, and the number is large. The fire-fighting interface formed by buckling has high strength, is not easy to break, and can withstand high-strength water supply The impact of pressure can meet the popularization and application of high-power fire-fighting water tank vehicle equipment. 2. The fire-fighting interface has a lock, which can prevent the claws from loosening after fastening, and there will be no tripping phenomenon. 3. The size of the fire-fighting interface can be adjusted arbitrarily, which is more suitable for large-diameter connecting parts.

Description of drawings

Fig. 1 is the structural representation of the left interface of fire-fighting interface of the present invention;

Fig. 2 is a structural schematic diagram of the left interface of the fire-fighting interface of the present invention (taking the hose interface as an example);

Fig. 3 is a structural schematic diagram of the right interface of the fire-fighting interface of the present invention (taking the hose interface as an example);

Fig. 4 is a schematic structural view of the auxiliary body used in conjunction with the hose interface;

Fig. 5 is a cross-sectional view of the hose interface;

FIG. 6 is an enlarged view of point A in FIG. 5 .

Detailed ways:

There are many types of fire-fighting interfaces, and the technical solution of the present invention will be further described below by taking the hose interface as an example.

As shown in Figure 1, the fire-fighting interface includes a left interface 1 and a right interface 2 (the claws of the left and right interfaces have the same shape, and the right interface is turned over to become the left interface), and the end face of the left interface 1 is uniformly distributed with left claws 11 , the left clasp 11 extends axially from its end face for a section and then bends to form a claw-shaped hook groove; Bending to form a claw-shaped hook groove, wherein the bending directions of the left and right claws are opposite; the left and right claws are buckled together to form a fire protection interface.

As shown in Figures 2, 3 and 4, in addition to the above-mentioned left and right interfaces, the hose interface also has an auxiliary body 8 that is used in conjunction with the left and right interfaces respectively. One end surface of the auxiliary body 8 has a large diameter and can be stuck on the left , the end surface of the right interface.

As shown in FIG. 5 , the inner wall of the port of the auxiliary body 8 is provided with a sealing ring 9 , and when a pair of hose interfaces are docked, the corresponding auxiliary body 8 is sealed by the sealing ring 9 .

The left and right interfaces are evenly provided with reinforcing ribs 3 in the circumferential direction, and the reinforcing ribs 3 can be arranged axially and widened (the existing reinforcing ribs are generally very narrow), which not only strengthens the resistance of the contact parts of the left and right interfaces with the auxiliary body 8 Tensile strength, and under the action of external force (such as using tools), it can help the left and right buckles to snap together, and it is also very beautiful.

A ferrule 4 may be provided on the left and right interfaces, and the left and right buckle claws are arranged on the end face of the ferrule 4 and integrally formed with the ferrule 4 . At this time, the reinforcing rib 3 can also be arranged on the ferrule 4 , opposite to the buckle claw, and integrally formed with the ferrule 4 .

In order to prevent the left and right clasps from loosening after being fastened, a preventable retractable lock 5 is provided on the ferrule 4 (or the ferrule 4 and the reinforcing rib 3 integrally formed therewith) corresponding to each pair of clasps in the axial direction.

As shown in Figure 6, the lock 5 is a cylinder with a large diameter in the front section and a small diameter in the rear section. Correspondingly, the length of the hole with a large diameter is greater than the length of one section of the large diameter of the lock buckle 5, and the lock rod of the small diameter section of the lock buckle 5 is covered with a spring 6 that controls the expansion and contraction of the lock buckle 5, and stretches out the hoop at the lock buckle One end of the small diameter of 4 is provided with limit pin 7 radially.

Wherein, the working end face of the locking buckle 5 is an inclined plane (the length protruding from the ferrule is about 5mm), which is conducive to disengagement of the left and right interfaces after fastening.

The limit pin 7 is a handle, which is conducive to turning the lock catch 5 .

Working principle: first assemble the left and right interfaces and the auxiliary body, and then extend the claw-shaped hook of each claw of the right interface into the claw-shaped groove of the corresponding claw of the left interface (during this process, the right claw will start to contact and squeeze Press the working end of the lock on the left interface ferrule, the lock end is first compressed into the hole on the ferrule, after the right claw leaves the lock, the working end pops out of the hole), and then the left and right claws rotate An angle (for example, 30° clockwise) is fastened to form a hose joint (if the working end face of the lock is an inclined plane, it is necessary to turn the handle on the limit pin so that the inclined plane is in a state where the left and right joints cannot fall off). If you need to disassemble the hose connector, you need to reverse the left and right claws to disengage it, and turn the limit pin (if there is a handle on the limit pin, turn the handle), so that the slope of the lock is at the position where the left and right connectors can fall off Then exit the right interface (if the working end face of the lock is not inclined, you need to manually squeeze the lock when withdrawing from the right interface to make it retract into the hole).

Claims (7)

1. a Fire coupling, comprises left interface (1) and right interface (2), it is characterized in that: the end face of described left interface (1) is along circumferential uniform left button pawl (11), and this left button pawl (11) is bent to form claw type and hooks groove from its end face axial is extended one section; The end face of described right interface (2) is along circumferential uniform right button pawl (21), and this right button pawl (21) is bent to form claw type and hooks groove from its end face axial is extended one section, and wherein, the overbending direction of left and right button pawl is contrary; Left and right button pawl fastens formation Fire coupling mutually.

2. Fire coupling according to claim 1, is characterized in that: be circumferentially evenly provided with stiffening rib (3) at described left and right interface.

3. Fire coupling according to claim 1 and 2, is characterized in that: described left and right interface is provided with cuff (4), and described left and right button pawl is arranged on the end face of this cuff (4) and is one-body molded with cuff (4).

4. Fire coupling according to claim 3, is characterized in that: the upper corresponding every make-up pawl of described cuff (4) is axially arranged with the loosening telescopic snap close (5) of left and right button pawl that can prevent after fastening.

5. Fire coupling according to claim 4, it is characterized in that: described snap close (5) is cylindrical body, leading portion diameter is large, back segment diameter is little, in the hole and snap close (5) front and back of cuff (4) upper installation snap close (5), two sections of diameters are corresponding, and the length in the hole that diameter is large is greater than the length of one section of snap close (5) major diameter, on the locking-bar of snap close (5) minor diameter, cover has the flexible spring (6) of control snap close (5), and the minor diameter one end of stretching out cuff (4) at snap close (5) is radially provided with position limit pin (7).

6. according to the Fire coupling described in claim 4 or 5, it is characterized in that: the operative end surface of described snap close (5) is an inclined-plane.

7. Fire coupling according to claim 5, is characterized in that: described position limit pin (7) is one handle.

Images