CN101357255A - Involute arc nozzle fire extinguishing sprinkler head - Google Patents

Abstract

The invention relates to an involute arc spout fire extinguishing sprinkler head of a fire extinguishing device with a mechanical liquid sprinkling fire extinguishing agent, which solves the problem that the existing circular spout groove sprinkler head costs fire extinguishing agent and delays fire extinguishing time. The sprinkler head comprises a sprinkler head body, a bearing and a connecting pipe; the spout groove is involute arc along the radial direction; the spraying angle of B end which is the starting end of the involute arc spout groove 4 is 70-85 degrees, the spraying angle of C end which is the ending end of the involute arc spout groove 4 is 40-45 degrees, and the base radius r of the involute is 10-15mm. The spout groove is in the involute shape, thus the sprayed fire extinguishing agent forms a round cake shape while being sprayed, which is good for fire extinguishing. The sprinkler head is applied to liquid extinguishing agents comprising water, aqueous film forming foam concentrate, and the like. The sprinkler head has the advantages of extinguishing fire in a short time with a few fire extinguishing agents, low fire extinguishing cost, high fire extinguishing efficiency, convenient use, flexible action, saving time and high efficiency, and is applied to oil fire of aerosheds, etc.

Description

Involute arc nozzle fire extinguishing sprinkler head

technical field

The invention belongs to the technical field of fire extinguishing equipment, and in particular relates to a fire extinguishing spray head of a mechanical fluid spraying fire extinguishing agent fire extinguishing device.

Background technique

In order to prevent and extinguish oil fires that leak from the ground or high places and flow to the ground, fire extinguishing sprinklers are arranged on the ground, and the fire extinguishing agent is sprayed from bottom to top, especially in places such as hangars, such sprinklers are often used to spray water or water to form a film Fire extinguishing agents such as foam liquid. Existing fire extinguishing device of this type is to adopt the shower head of ring-shaped spout groove, and the aqueous film-forming fire extinguishing agent sprayed from the ring spout forms a ring shape, and the fire is extinguished by the foam liquid self-diffusion covering the oil surface, which not only wastes the fire extinguishing agent but also Delay the fire fighting time.

Contents of the invention

In order to solve the problem of consuming fire extinguishing agent and delaying the fire extinguishing time of the existing circular spout groove sprinkler head, the present invention provides a fire extinguishing sprinkler head with involute arc spout.

The structural improvement technical scheme that realizes above-mentioned purpose is as follows:

A fire-fighting sprinkler head with an involute arc nozzle, including a sprinkler head body, a bearing and a connecting pipe. The sprinkler head body is a cylinder with an inner concave step at one end in the axial direction, and the inner concave step end is connected to the connecting pipe through the bearing. , the other end is evenly distributed with two to four spout grooves, characterized in that:

The spout slot is involute in the radial direction; the jet angle at the B end of the involute spout slot 4 is 70-85 degrees, the slot width of the spout slot entrance at the B end of the start end is 0.6-3.0mm, and the slot width of the exit 0.5-2.8mm; the injection angle at the terminal end C of the involute nozzle groove 4 is 40-45 degrees, the inlet groove width of the nozzle groove at the terminal end C end is 0.6-2.6mm, and the outlet width of the groove is 0.5-2.5mm; The radius r of the involute base circle is 10-15mm.

The diameter of the sprinkler head body is 40-120mm, and the thickness is 10-16mm.

The bearing is a waterproof needle roller bearing with a single-sided seal and an inner ring.

The involute equation adopted by the nozzle groove of the sprinkler head is: x=r(cost+tsint), y=r(sint-tcost), where r is the radius of the base circle, and the value is 10-16mm; t is the spread angle , the unit is radian, the value of t is 90°～170°, the center of the cross section of the sprinkler head is the dot of the involute line; according to the projectile equation: R=(v*v*sin2θ)/g, H= (v*v*sin2θ)/(2g), when the projecting angle θ is 45 degrees, the projecting distance is the farthest, and different projecting angles are used at different points of the nozzle groove to make the involute ejection The fire extinguishing agent is injected from near to far to form an involute surface, and 2 to 4 involute nozzle grooves are evenly distributed on the sprinkler head. When the fire extinguishing agent passes through the nozzle grooves, under the action of the pressure of the fire extinguishing agent, the sprinkler head gets A tangential force, under the action of this tangential force, the sprinkler head body can rotate by itself, so that the sprayed fire extinguishing agent forms a circular cake shape, covering the oil surface of the flame around the sprinkler head, which is beneficial to fire extinguishing. The sprinkler head is suitable for liquid fire extinguishing agents including water and aqueous film-forming foam liquid. The fire can be extinguished in a short time, less fire extinguishing agent is used, the fire extinguishing cost is low, and the fire extinguishing efficiency is improved. It is convenient to use, flexible and maneuverable, time-saving and efficient, and is suitable for extinguishing oil surface fires in hangars and the like.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention,

FIG. 2 is a top view of FIG. 1 .

Detailed ways

The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.

Example 1:

Referring to Fig. 1 and Fig. 2, a fire extinguishing sprinkler head with an involute arc nozzle includes a sprinkler head body 1, a bearing 2 and a connecting pipe 3, and the sprinkler head body 1 is a cylinder with a diameter of 100 mm and a thickness of 13 mm. A cylindrical body with an inner concave step 5 at one axial end, the inner concave step end is connected to the connecting pipe 3 through the bearing 2; the other end is evenly distributed with four nozzle grooves, the nozzle grooves are involute in the radial direction, and the center of the circle is involute The origin of the open line; the equation of the involute is: x=r(cost+tsint), y=r(sint-tcost), where r is the radius of the base circle, the value is 14mm, t is the spread angle, and its unit is radian, t The value is 90°～170°, 90° is the starting end B of the involute spout groove 4, 170° is the terminal end C of the involute spout groove 4, and the lower inlet of the spout groove 4 and the upper outlet are in a certain Injection angle, the size of the injection angle changes uniformly from the nozzle at the beginning end of the involute of the sprinkler head body to the nozzle at the end of the involute end C. The injection angle of the starting end B of the groove 4 is 85°, and the sprayed fire extinguishing agent is relatively close. The width of the upper outlet here is 1mm, and the width of the lower inlet is 1.4mm; the injection at the terminal end C of the involute nozzle groove 4 The angle is 45 °, and the sprayed fire extinguishing agent is the farthest. Here, the width of the outlet above the sprinkler head body is 2mm, and the width of the lower entrance is 2.6mm, so the sprayed fire extinguishing agent is more; The pressure acts on the nozzle groove with spray angle, so that the sprinkler head obtains a rotating tangential force, and the sprinkler head body 1 and the connecting pipe 3 are connected by the bearing 2. Under the action of this tangential force, the sprinkler head body can automatically Rotation; the length of the connecting pipe 3 is 200mm, the outer diameter is 32mm, one end has M32 external thread, which is used to connect with the fire pipe, and the other end is connected with the bearing 2; the bearing 2 adopts NA4913 single-sided seal with an outer diameter of 90mm and an inner diameter of 45mm Waterproof needle roller bearing with an inner ring, the unthreaded end of the connecting pipe 3 is inserted from the middle and lower part of the bearing 2, and is flush with the upper part of the bearing 2, and the connecting pipe 3 and the bearing 2 are tightly connected; the upper end of the bearing 2 is connected from the sprinkler head body 1 The lower part is inserted into the step 5 of the sprinkler head body and tightly fitted.

When in use, connect the end of the connecting pipe 3 with the M32 thread to the fire-fighting pipe with the M32 internal thread. The fire extinguishing agent is sprayed in a form, forming a round cake of fire extinguishing agent around the sprinkler head, directly covering the oil surface, the fire extinguishing time is short and the efficiency is high.

This sprinkler head can be applied to most liquid fire extinguishing agents including water and aqueous film-forming foam liquid. It can extinguish the fire in a short time, uses less fire extinguishing agent, low fire extinguishing cost, easy to use, flexible and maneuverable, time-saving and efficient, and is suitable for extinguishing oil surface fires in hangars, etc.

Example 2:

The diameter of the sprinkler head body is 90mm, and the thickness is 10mm; there are two nozzle slots evenly distributed on the sprinkler head body. The slot width is 0.5; the jet angle at the terminal end C of the involute spout slot is 40 degrees, where the slot width at the entrance of the spout slot is 0.7 mm, and the slot width at the exit is 0.6 mm; the radius r of the involute base circle is 10 mm.

Others are with embodiment 1.

Example 3:

The diameter of the sprinkler head body is 120mm, and the thickness is 15mm; there are three nozzle slots evenly distributed on the sprinkler head body, and the spray angle at the beginning end B of the involute nozzle slot is 80 degrees. The groove width of the involute spout groove is 2.8mm; the injection angle at the end C of the involute spout groove is 40 degrees, where the groove width of the nozzle groove inlet is 2.6mm, and the groove width of the outlet is 2.5mm; the radius r of the involute base circle is 16mm .

Others are with embodiment 1.

Claims (3)

1. A fire-fighting sprinkler head with an involute arc nozzle, including a sprinkler head body, a bearing and a connecting pipe. The sprinkler head body is a cylinder with a concave step at one end in the axial direction, and the concave step end is connected by a bearing. The connecting pipe has two to four spout grooves on the other end, which is characterized in that: The spout slot is involute in the radial direction; the jet angle at the B end of the involute spout slot 4 is 70-85 degrees, the slot width of the spout slot entrance at the B end of the start end is 0.6-3.0mm, and the slot width of the exit 0.5-2.8mm; the injection angle at the terminal end C of the involute nozzle groove 4 is 40-45 degrees, the inlet groove width of the nozzle groove at the terminal end C end is 0.6-2.6mm, and the outlet width of the groove is 0.5-2.5mm; The radius r of the involute base circle is 10-15mm. 2. The involute arc fire-fighting sprinkler head according to claim 1, characterized in that: the diameter of the sprinkler head body is 40-120 mm, and the thickness is 10-16 mm. 3. The involute arc fire-fighting sprinkler head according to claim 1, characterized in that: the bearing is a waterproof needle roller bearing with a single-sided seal and an inner ring.

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