CN203954514U - A kind of thin water mist fire-fighting water cannon big gun head - Google Patents

Abstract

The utility model discloses a nozzle of a fine water mist fire-fighting water monitor, which is composed of a nozzle diffusion section, a nozzle main body, a rectifier, a sealing ring I, a nozzle interface, a spring washer, a sealing ring II and a nozzle body outlet pipe. The nozzle diffuser section and the nozzle main body are connected by welding to form the nozzle. The nozzle diffuser section adopts a duckbill jet flow structure, and the nozzle is connected to the nozzle body outlet pipe of the fire water monitor through the nozzle interface. The rectifier is installed inside the gun head interface and fixed by the shoulder and the spring washer to stabilize the water flow. Under the joint action of the rectifier and the nozzle, the water flow is evenly sprayed in a smooth fan-shaped mist and has a long range. The nozzle of the fine water mist fire-fighting water monitor has a good atomization effect and can guarantee a relatively long-range coverage. It is especially suitable for spraying and dust suppression in urban haze removal or coal transportation places, as well as occasions where explosions occur during fire fighting.

Description

Nozzle of fine water mist fire-fighting water cannon

technical field

The utility model relates to a fire-fighting water cannon head, in particular to a fine water mist fire-fighting water cannon head.

Background technique

Fire water cannon occupies an important position in the field of fire fighting. The nozzle of the fire water monitor is a key component in the design of the fire water monitor. It is the last link to convert the potential energy of the pressure water flow into kinetic energy, and it also determines the spraying mode of the fire water monitor. The water jets ejected from the nozzle of the fire water monitor have two typical forms: straight-line injection and spray injection. Spray jet fire extinguishing means that the water flow is sprayed from the nozzle to form mist-like fine water droplets, which evenly cover the protected area, and achieve the purpose of extinguishing fire, suppressing the fire and cooling protection through cooling and suffocation. Compared with the traditional direct-flow spray fire extinguishing method, spray spray fire extinguishing can not only greatly reduce water consumption, increase fire extinguishing coverage, but also has little damage to fire equipment, and is environmentally friendly and non-polluting. Therefore, it is more and more widely used in extinguishing fires in power equipment, libraries and other equipment, as well as explosion-proof and flame-retardant in fire places.

In addition, with the continuous development of industrial technology, in the coal mine and thermal power generation industry, the content of various coal dusts is easy to exceed the standard near the conveying trestle or bulk material belt conveyor corridor, coal storage (material) yard and other loading and crushing equipment. Seriously affect the environment and endanger the health of employees. Coal dust is also an explosion hazard. Once burned and exploded, it will bring heavy losses to the enterprise. Therefore, dust control in thermal power plants is urgent. In addition to the dust collector, the dust-proof and dust-removing equipment of the existing coal conveying system is a water spray device. However, the dust removal nozzle in the water spray device is easily blocked during work, and the atomization effect is not good.

The fire water cannon has the advantages of long range and large flow rate. The longest range can reach more than 200 meters, and the maximum flow rate can reach 300L/s. At the same time, through the structural design of the gun head nozzle, the mutual conversion of the two jet modes of straight-line injection and spray injection can be realized. However, during the spraying process of ordinary fire water cannons, the atomization area at the point where the water falls is too small, and the range is not far enough, generally within 30 meters. It cannot be well applied to spray dust suppression in cities or coal transportation places. At the same time, the existing high-pressure water mist fire extinguishing system has the characteristics of good atomization effect, large spray angle, small droplet particle diameter, and fast initial speed of droplet movement, and the high-pressure water mist fire extinguishing system uses less water, only It is 1/5 of the water sprinkler system. However, when the high-pressure water mist fire extinguishing system is working, the system working pressure is too high, generally above 10MPa, and an additional high-pressure water pump is required to supply water, which increases the system cost to a certain extent.

Contents of the invention

In order to overcome the problems existing in the background technology and meet the actual requirements of firefighting operations, the utility model proposes a nozzle of a fine water mist firefighting water cannon. The nozzle part of the nozzle of the water mist fire-fighting water monitor adopts a duck-bill jet structure, and is connected to the outlet pipe of the fire-fighting water monitor body through the nozzle interface. When the water flows through the fire-fighting water cannon, under the joint action of the rectifier and the nozzle, it sprays out smoothly in the form of a fan-shaped mist, and has a long range. It can be widely used in urban smog removal or coal handling places for spraying dust and explosions during fire fighting. occasion.

The technical solution adopted by the utility model to solve the technical problem includes: nozzle diffuser section (1), nozzle body (2), rectifier (3), sealing ring I (4), nozzle interface (5), spring washer (6 ), the sealing ring II (7) and the gun body outlet pipe (8); the nozzle diffusion section (1) and the nozzle body (2) are fixedly connected by welding to form the nozzle of the nozzle of the fine water mist fire-fighting water monitor; the nozzle body (2) It is fixed together with the gun head interface (5) through threaded connection; the seal between the nozzle body (2) and the gun head interface (5) is sealed by the sealing ring I (4); the rectifier (3) is installed on the gun head interface (5) Internally, the rectifier (3) and the nozzle interface (5) adopt an interference fit, one end of the rectifier (3) is fixed by the shoulder of the nozzle interface (5), and the other end of the rectifier (3) is fixed by a spring washer (6); There is an annular groove inside the head interface (5), and the spring washer (6) is fixedly installed in the inner annular groove of the gun head interface (5); the gun head interface (5) and the gun body outlet pipe (8) are fixed together through threaded connection ; The gun head interface (5) and the gun body outlet pipe (8) are sealed by the sealing ring II (7). The nozzle diffuser section (1) is designed in the shape of a duckbill, its water inlet part is designed as a circular opening, and its water outlet part is designed as a flat rectangular opening.

Compared with the background technology, the utility model has the beneficial effects of:

1. The atomization effect is good, and it can form a good atomization effect under the relatively low pressure of the fire water monitor, while ensuring a long range of fire and increasing the coverage area of the fire monitor water flow. It can effectively avoid the expensive maintenance cost of the fire extinguishing system due to high pressure, and further expand the scope of application of the fire water monitor.

2. Simple structure and easy installation, it can be widely used in multi-place fire extinguishing with fixed and mobile fire-fighting water cannons, as well as spray dust suppression in cities and coal handling places.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a left view of the utility model.

Fig. 3 is a structural schematic diagram of the rectifier of the present invention.

Fig. 4 is a structural schematic diagram of the diffusion section of the nozzle of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the utility model comprises: nozzle diffuser section, nozzle main body, rectifier, sealing ring I, nozzle interface, spring washer, sealing ring II and gun body outlet pipe.

The nozzle diffusion section and the nozzle main body are fixedly connected by welding to form the nozzle of the nozzle of the fine water mist fire-fighting water monitor. The diffuser section of the nozzle is designed in the shape of a duckbill, its water inlet part is designed as a circular opening, and its water outlet part is designed as a flat rectangular opening. The main body of the nozzle consists of two parts: a straight section and a contraction section. The straight section is a cylindrical straight tube with threads processed inside, rigidly connected with the nozzle interface, and sealed by a sealing ring I. The function of the direct current section is to connect with the nozzle interface and stabilize the water flow. The shrinkage section is a conical tube whose inner diameter gradually shrinks at one end. When the water flow passes through the shrinkage section, the cross-sectional area becomes smaller, and the water flow maintains a laminar flow state and the speed increases. In the diffuser section of the nozzle, the shape of the cross section of the water flow gradually changes from a circle to a rectangle, which can compress the water flow, further increase the water flow velocity, and constrain the water flow to a flat shape, increasing the contact area between the water flow and the air. This can not only increase the shooting range of the fine water mist fire water cannon, but also promote the atomization of the water flow, so as to achieve the two purposes of long range and atomization.

The gun head interface is a section of cylindrical stepped tube, which is not only the connection element between the gun body outlet pipe and the nozzle, but also used to install the rectifier. The inner diameter of the gun head interface is processed with an internal thread, which is connected with the gun body outlet pipe thread and sealed by the sealing ring II, and the end with a smaller inner diameter is processed with an external thread for connecting the nozzle body.

The rectifier adopts a star rectifier, which is installed inside the nozzle interface, and adopts an interference fit with the nozzle interface, and the two ends are fixed axially by shoulders and spring washers. The function of the rectifier is to stabilize the water flow, so that the whole water flow becomes a laminar flow, and the flow is uniform and stable, thereby reducing energy loss and increasing the range of the water cannon.

When operating the fine water mist fire monitor, keep the nozzle of the fine water mist fire monitor parallel to the horizontal plane to ensure the largest coverage area of the water mist. The water flow covers the fire area in a fan shape, sprayed in the form of mist and has a large range of coverage, which can achieve a good effect of fire fighting or haze removal and dust reduction.

Claims (2)

1. A fine water mist fire-fighting water monitor nozzle, is characterized in that, comprises: nozzle diffusion section (1), nozzle main body (2), rectifier (3), sealing ring 1 (4), nozzle interface (5) , spring washer (6), sealing ring II (7) and gun body outlet pipe (8); the nozzle diffusion section (1) and the nozzle body (2) are fixedly connected by welding to form the nozzle of the nozzle of the fine water mist fire-fighting water monitor; The nozzle main body (2) and the gun head interface (5) are fixed together by threaded connection; the nozzle body (2) and the gun head interface (5) are sealed by a sealing ring I (4); the rectifier (3) is installed on the gun head Inside the nozzle interface (5), the rectifier (3) and the nozzle interface (5) adopt an interference fit, one end of the rectifier (3) is fixed by the shoulder of the nozzle interface (5), and the other end of the rectifier (3) is fixed by a spring washer ( 6) fixed; the nozzle interface (5) is provided with an annular groove inside, and the spring washer (6) is fixedly installed in the inner annular groove of the nozzle interface (5); the nozzle interface (5) and the gun body outlet pipe (8) pass through The threaded connection is fixed together; the gun head interface (5) and the gun body outlet pipe (8) are sealed by the sealing ring II (7). 2. The nozzle of a fine water mist fire-fighting water monitor according to claim 1, characterized in that: the nozzle diffuser section (1) is designed in the shape of a duckbill, its water inlet part is designed as a circular opening, and its water outlet part Designed with a flat rectangular opening.