KR102279213B1 - Fire extinguisher with injection nozzle - Google Patents

Abstract

The present invention relates to a fire extinguisher provided with a spray nozzle. In more detail, it relates to a fire extinguisher equipped with a spray nozzle that can satisfy criteria such as the amount of radiation per second or the radiation time required in the fire extinguishing test while being produced in a small size. For this purpose, the fire extinguisher provided with a spray nozzle according to an aspect of the present invention includes a body in which a fire extinguishing agent is accommodated, and a spray nozzle coupled to the body to spray the fire extinguishing agent, wherein the spray nozzle is disposed on the body. A coupling part having a screw thread to be coupled thereto, a body part extending from the coupling part and having a polygonal cross-section, and a head part extending from the body part and having a spray hole formed so that the fire extinguishing agent is sprayed to the outside, the First, second, and third internal flow paths are sequentially formed in the coupling part, the body part, and the head part.

Description

FIRE EXTINGUISHER WITH INJECTION NOZZLE

The present invention relates to a fire extinguisher provided with a spray nozzle. In more detail, it relates to a fire extinguisher equipped with a spray nozzle that can satisfy criteria such as the amount of radiation per second or the radiation time required in the fire extinguishing test while being produced in a small size.

In general, buildings are equipped with fire extinguishers such as Patent Document 1 for immediate response in case of fire, but these fire extinguishers are large in size and heavy, so they are placed in invisible places such as hallways or corners. It takes a lot of time to find, and because of its large size, mobility is reduced, so it is not easy to bring it to the fire site.

In order to improve this, recently, a small fire extinguisher that is easy to use is installed in each vehicle or private house. These small fire extinguishers are generally made small in consideration of accessibility and portability, but as they are made small, a relatively small amount of fire extinguishing materials had to be accommodated because the space for accommodating fire extinguishing agents is limited.

However, in order to function as a normal fire extinguisher, standards such as the amount of radiation per second and radiation time must be satisfied. In the case of a small fire extinguisher, it is difficult to meet these standards because the amount of extinguishing agent contained is small, so it is difficult to apply it in practice. .

Therefore, it is necessary to develop a small fire extinguisher that can satisfy the standards for the function as a fire extinguisher while being produced in a small size.

Korean Patent Application Laid-Open No. 10-1986-0000082 (published on June 1, 1982)

The technical problem to be solved in the present invention is to provide a fire extinguisher equipped with a spray nozzle that can satisfy the criteria such as the amount of radiation per second or the radiation time required in the fire extinguishing test while being produced in a small size.

Technical problems to be solved in the present invention are not limited thereto, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

A fire extinguisher equipped with a spray nozzle according to an aspect of the present invention for solving the above technical problem is a fire extinguisher having a body in which a fire extinguishing agent is accommodated, and a spray nozzle coupled to the body to spray the fire extinguishing agent, the spray The nozzle includes a coupling part having a screw thread to be coupled to the body, a body part extending from the coupling part, and having a polygonal cross-section, and a spray hole formed to extend from the body part, so that the fire extinguishing agent is sprayed to the outside. It includes a head part, and first, second, and third internal flow paths are sequentially formed in the coupling part, the body part, and the head part.

In this case, an extension groove extending in a left and right direction with respect to the injection hole may be formed at the front end of the head part.

In this case, the expansion groove may include a first curve and a second curve formed in the vertical direction with respect to the injection hole.

In this case, the first curve may be formed to have a curvature that sequentially connects a starting point formed on one side of the front end of the head part, an upper end point of the injection hole, and an end point formed on the other tip side of the head part.

In this case, the second curve may be formed to have a curvature that sequentially connects a starting point formed on one side of the front end of the head part, a lower end point of the injection hole, and an end point formed on the other tip side of the head part.

In this case, a cross-sectional reduction passage may be formed between the second inner passage and the third inner passage, and an inclined surface connecting the second inner passage and the third inner passage may be formed in the reduced cross-section.

In addition, in the fire extinguisher provided with a spray nozzle according to another aspect of the present invention, the fire extinguisher includes a body in which a fire extinguishing agent is accommodated, and a spray nozzle coupled to the body to spray the fire extinguishing agent, wherein the spray nozzle is located on the body. A coupling part having a screw thread to be coupled thereto, a body part extending from the coupling part and having a polygonal cross-section, and a head part extending from the body part and having a spray hole formed so that the fire extinguishing agent is sprayed to the outside, the The diameter of the injection hole may be formed to satisfy the following relational expression.

0.29 ≤ a/d ≤ 0.323

(a: diameter of the injection hole, d: diameter of the inner flow path of the coupling part)

In addition, in the fire extinguisher provided with a spray nozzle according to another aspect of the present invention, the fire extinguisher includes a body in which a fire extinguishing agent is accommodated, and a spray nozzle coupled to the body to spray the fire extinguishing agent, wherein the spray nozzle is located on the body. A coupling part having a screw thread to be coupled thereto, a body part extending from the coupling part and having a polygonal cross-section, and a head part extending from the body part and having a spray hole formed so that the fire extinguishing agent is sprayed to the outside, the The length of the head part may be formed to satisfy the following relational expression.

0.275 ≤ b/l ≤ 0.325

(b: the length of the head, l: the total length of the spray nozzle)

According to the fire extinguisher provided with the spray nozzle of the present invention having the above configuration, an internal flow path and a spray hole are formed in the spray nozzle to which the fire extinguishing agent is sprayed, and an expansion groove is formed so that the sprayed fire extinguishing agent is sprayed while expanding in the left and right directions. Although it is small, it is possible to satisfy the standards required in the fire extinguishing test.

In particular, it is possible to sufficiently satisfy the criteria required in the fire extinguishing test by making the diameter of the injection hole relative to the diameter of the inner passage of the injection nozzle or the length of the head relative to the entire length of the injection nozzle be formed within a certain range.

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a side view illustrating a state in which a spray nozzle according to the present invention is separated from a fire extinguisher body.
2 is a cross-sectional view of a spray nozzle according to the present invention.
3 is a front view of a spray nozzle according to the present invention.
4 and 5 are graphs showing the results of performing a fire extinguishing test while changing the diameter of the injection hole formed in the injection nozzle according to the present invention, Figure 4 is a graph showing the effective radiation time, Figure 5 is the amount of radiation per second is the graph shown.
6 and 7 are graphs showing the results of performing a fire extinguishing test while changing the length of the head formed in the spray nozzle according to the present invention, Figure 6 is a graph showing the amount of radiation per second, Figure 7 is the effective radiation time is the graph shown.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and the same reference numerals are attached to the same or similar components throughout the specification.

In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof. Further, when a part of a layer, film, region, plate, etc. is said to be “on” another part, this includes not only the case where the other part is “directly on” but also the case where there is another part in between. Conversely, when a part of a layer, film, region, plate, etc. is said to be “under” another part, this includes not only cases where it is “directly under” another part, but also a case where another part is in between.

1 is a side view illustrating a state in which a spray nozzle according to the present invention is separated from a fire extinguisher body, FIG. 2 is a cross-sectional view of the spray nozzle according to the present invention, and FIG. 3 is a front view of the spray nozzle according to the present invention.

1, the fire extinguisher provided with a spray nozzle according to an aspect of the present invention includes a body 10 containing a fire extinguishing agent, and a spray nozzle 20 coupled to the body 10 to spray the fire extinguishing agent. this is provided

As described above, since the amount of fire extinguishing agent accommodated in such a body 10 is small, when a spray nozzle used in a general fire extinguisher is used, all of the standards to be satisfied as a fire extinguisher cannot be satisfied, so the fire extinguishing agent accommodated in the small body 10 is not satisfied. It is necessary to configure the spray nozzle 20 so that all of the above criteria can be satisfied by using the medicinal material.

The spray nozzle 20 includes a coupling part 100 having a thread formed to be coupled to the body 10, a body part 200 extending from the coupling part 100, and having a polygonal cross-section, and a body part 200. It is formed extending from and includes a head part 300 having a spray hole 310 formed so that the extinguishing agent is sprayed to the outside.

The coupling part 100 needs to be stably fixed so as not to be separated from the body 10 even when spraying pressure is applied during the fire extinguishing agent spraying process. For this purpose, the coupling part 100 has a screw thread 110 formed in the body 10 . ) and can be screwed together.

However, as for the fixing method of the coupling part 100, if it is possible to prevent separation of the injection nozzle 20 in a situation where injection pressure is applied, it is possible to couple not only by screwing but also through forced press-fitting of the press-fitting method. Various bonding methods may be used.

The body part 200 is a part for holding the spray nozzle 20 in the process of coupling the coupling part 100 to the body 10, for example, as described above, a fastening tool may be used for screw coupling. It may be formed to have a polygonal cross section.

A spray hole 310 is formed in the head part 300 so that the fire extinguishing agent is sprayed to the outside, and the fire extinguishing agent accommodated in the body 10 is injected into the coupling part 100, the body part 200, and the head part ( 300) and then sprayed to the outside through the injection hole 310.

To this end, first, second, and third internal flow paths I1, I2, and I3 are provided inside the coupling part 100, the body part 200, and the head part 300, as shown in FIG. are formed sequentially.

At this time, as shown in FIG. 3 , an expansion groove 320 extending in the left and right directions with respect to the injection hole 310 may be formed at the tip of the head part 300 .

That is, the expansion groove 320 is formed so that the fire extinguishing agent sprayed through the injection hole 310 is sprayed while spreading within a certain range, and the expansion groove 320 extends in the left and right directions around the injection hole 310 . can be formed. When configured in this way, the fire extinguishing agent sprayed to the outside is sprayed while spreading in the left and right directions, so that a wide range of fire extinguishing is possible at once.

However, if the extinguishing agent is sprayed while spreading too widely, the extinguishing area may be widened, but, conversely, the extinguishing power may decrease, so it is important to properly form the expansion groove 320 .

The expansion groove 320 for this purpose may include a first curve 321 and a second curve 322 formed in the vertical direction with respect to the injection hole 310 . That is, as shown in FIG. 3 , the first curve 321 and the second curve 322 are formed in the vertical direction around the injection hole 310, and the first curve 321 and the second curve ( 322) are formed to cross each other. In addition, referring to FIG. 3 , the interval between the first curve 321 and the second curve 322 is formed to become narrower in a direction away from the injection hole 310 . When configured in this way, the fire extinguishing agent sprayed through the injection hole 310 is sprayed while spreading left and right through the area formed between the first curve 321 and the second curve 322, and the first curve 321 and the second curve 321 As the two curves 322 are adjacent to each other, the amount of fire extinguishing agent sprayed while spreading is reduced. This fire extinguishing agent is sprayed only to the intersection of the first curve 321 and the second curve 322, and it is possible to prevent the fire extinguishing agent from being sprayed in the area beyond the intersection point, so that it is possible to secure the fire extinguishing area and the fire extinguishing power at the same time. .

Detailed configurations of the above-described first curve 321 and second curve 322 will be described below.

The first curve 321 has a starting point S1 formed on one side of the tip of the head part 300 , an upper end point T of the injection hole 310 , and an end point S2 formed on the other side of the tip of the head part 300 . may be formed to have a curvature that sequentially connects them.

That is, the starting point S1 and the upper end point T and the end point S2 of the injection hole 310 are formed to be the same as the curvature of the circle passing at the same time. It is possible to secure sufficient fire area and fire extinguishing power through this. This is more extended than the shape connecting the starting point S1 and the upper end point T of the injection hole 310 in a straight line, or connecting the end point S2 and the upper end point T of the injection hole 310 in a straight line. This is because the area of the groove 320 is increased, so that the amount of fire extinguishing agent sprayed is relatively increased.

However, it is important to configure the first curve 321 not to be formed above the upper end point T of the injection hole 310 . If the first curve 321 is disposed above the upper end point T of the injection hole 310, the fire extinguishing agent is injected not only in the left and right direction but also upward, and this causes excessive injection due to a decrease in the injection time. This is because the standards cannot be met.

In addition, the second curve 322 also has a starting point S1 formed on one side of the tip of the head portion 300, a lower end point B of the injection hole 310, and an endpoint formed on the other side of the tip of the head portion 300 ( S2) may be formed to have a curvature that sequentially connects them.

As described above, the starting point S1 and the lower end point B and the end point S2 of the injection hole 310 are formed to be the same as the curvature of the circle passing at the same time, and if configured in this way, the starting point S1 and the injection hole 310 are formed. The area of the expansion groove 320 is increased compared to the shape of connecting the lower end point B of 310 in a straight line or connecting the end point S2 and the lower end point B of the injection hole 310 in a straight line. This is because it is possible to increase the amount of fire extinguishing agent being sprayed as it spreads, and through this, it is possible to secure sufficient extinguishing area and extinguishing power.

In addition, as described above, it is important to configure the second curve 322 not to be formed below the lower end point B of the injection hole 310 , and if the second curve 322 is the injection hole 310 , ), when disposed below the lower end point (B), the fire extinguishing agent is sprayed not only in the left and right directions but also downward, and this is because it is sprayed too much and the standard cannot be satisfied due to a reduction in the injection time.

At this time, as shown in FIG. 2 , a cross-sectional reduction passage I4 is formed between the second inner passage I2 and the third inner passage I3 , and the second inner passage is formed in the cross-sectional reduction passage I4 . An inclined surface 330 connecting I2 and the third internal flow path I3 may be formed.

That is, the fire extinguishing agent sequentially passing through the first internal flow path I1 and the second internal flow path I2 increases in speed while passing the cross-sectional reduction flow path I4, and in this way, the speed increases in the third internal It is possible to secure sufficient fire extinguishing power by configuring it to be sprayed to the outside through the injection hole 310 through the flow path I3.

4 and 5 are graphs showing the results of performing a fire extinguishing test while changing the diameter of the injection hole formed in the injection nozzle according to the present invention, Figure 4 is a graph showing the effective radiation time, Figure 5 is the amount of radiation per second is the graph shown.

In the fire extinguisher provided with a spray nozzle according to another aspect of the present invention, the fire extinguisher includes a body 10 containing a fire extinguishing agent, and a spray nozzle 20 coupled to the body 10 and spraying the fire extinguishing agent. The injection nozzle 20 includes a coupling part 100 having a thread formed to be coupled to the body 10, a body part 200 extending from the coupling part 100, and having a polygonal cross-section, and a body part 200 from the body part 200. It is formed to extend and includes a head part 300 having a spray hole 310 to be sprayed to the outside, and at this time, the diameter (a) of the spray hole 310 may be formed to satisfy the following relational expression. .

0.29 ≤ a/d ≤ 0.323

(a: diameter of the injection hole, d: diameter of the inner flow path of the coupling part)

That is, as seen above, since the amount of the extinguishing agent accommodated in the body 10 is small, when a spray nozzle used in a general fire extinguisher is used, all the standards to be satisfied as a fire extinguisher cannot be satisfied, so the small body 10 It is necessary to configure the spray nozzle 20 so that all of the above criteria can be satisfied using the received extinguishing agent.

A fire extinguishing test is performed while changing the diameter (a) of the injection hole 310 in a state where the diameter (d) of the first internal flow path (I1) formed in the coupling part 100 is 6 mm based on a 0.5 kg small fire extinguisher As one elapsed, as shown in FIG. 4, it can be seen that the effective radiation time (s) sharply decreases in the range in which the ratio of a/d becomes greater than 0.323. In addition, as shown in FIG. 5 , it can be seen that the radiation amount per second (g/s) rapidly decreases in the range where the a/d ratio is smaller than 0.29. That is, the ratio of a/d is preferably formed in the range of 0.29 or more to 0.323 or less. In addition, when the ratio of a/d is formed in such a range, it is possible to satisfy both the effective radiation time of 8 s and the amount of radiation per second of 40 g/s, which are the standards required for the fire extinguishing test.

6 and 7 are graphs showing the results of performing the fire extinguishing test while changing the length of the head formed in the spray nozzle according to the present invention, Figure 6 is a graph showing the amount of radiation per second, Figure 7 is the effective radiation time is the graph shown.

In the fire extinguisher provided with a spray nozzle according to another aspect of the present invention, the fire extinguisher includes a body 10 containing a fire extinguishing agent, and a spray nozzle 20 coupled to the body 10 and spraying the fire extinguishing agent. The injection nozzle 20 includes a coupling part 100 having a thread formed to be coupled to the body 10, a body part 200 extending from the coupling part 100, and having a polygonal cross-section, and a body part 200 from the body part 200. It is formed to extend and includes a head portion 300 having a spray hole 310 formed therein so that the fire extinguishing agent is sprayed to the outside, and in this case, the length (b) of the head portion 300 may be formed to satisfy the following relational expression. .

0.275 ≤ b/l ≤ 0.325

(b: the length of the head, l: the total length of the spray nozzle)

The progress of performing the fire extinguishing test while changing the length (b) of the head part 300 in a state where the diameter of the injection hole 310 formed in the coupling part 100 was 1.9 mm based on a 0.5 kg small fire extinguisher, FIG. 6 As shown in, in the range where the ratio of b/l becomes greater than 0.275, the amount of radiation per second (g/s) rapidly increases, and when the ratio of b/l is 0.3, the amount of radiation per second (g/s) is the maximum, As the ratio of b/l increases, the amount of radiation per second (g/s) gradually decreases. In the range where the ratio of b/l is greater than 0.325, it can be seen that the amount of radiation per second (g/s) decreases rapidly. That is, it is preferable that the ratio of b/l is formed in the range of 0.275 or more and 0.325 or less. In addition, if the ratio of b/l is formed in such a range, it is possible to satisfy the radiation rate of 40 g/s per second, the standard required in the fire extinguishing test. For reference, as shown in FIG. 7, even if the ratio of b/l is formed in the range of 0.275 or more to 0.325 or less, it is possible to satisfy the effective radiation time 8 s, which is the standard required in the fire extinguishing test.

According to the fire extinguisher provided with the spray nozzle 20 of the present invention, an internal flow path and a spray hole 310 are formed in the spray nozzle 20 to which the fire extinguishing agent is sprayed, and the sprayed fire extinguishing agent is expanded to be sprayed while expanding in the left and right directions. Since the groove 320 is formed, it is possible to satisfy the standards required in the fire extinguishing test while being small.

In particular, the diameter (a) of the injection hole 310 with respect to the diameter (d) of the inner passage (I1) of the injection nozzle 20, or the head portion 300 with respect to the total length (l) of the injection nozzle 20 By allowing the length (b) to be formed in a certain range, it is possible to sufficiently satisfy the standards required for the fire extinguishing test.

Although one embodiment of the present invention has been described, the spirit of the present invention is not limited to the embodiments presented herein, and those skilled in the art who understand the spirit of the present invention can add or change components within the scope of the same spirit. Other embodiments may be easily proposed by , deletion, addition, etc., but this will also fall within the scope of the present invention.

10: body 20: spray nozzle
100: coupling part 110: screw thread
200: body part 300: head part
310: injection hole 320: extended groove
321: first curve 322: second curve
330: inclined plane I1: first internal flow path
I2: second internal flow path I3: third internal flow path
I4: Section reduction flow path S1: Origin
S2 : End point T : Top point
B: bottom point

Claims (8)

In the fire extinguisher provided with a body in which the extinguishing agent is accommodated, and a spray nozzle coupled to the body to spray the extinguishing agent,
The spray nozzle is
a coupling part having a screw thread to be coupled to the body;
a body portion extending from the coupling portion and having a polygonal cross-section; and
a head part extending from the body part and having a spray hole so that the fire extinguishing agent is sprayed to the outside;
including,
An expansion groove extending in the left and right direction around the injection hole is formed at the tip of the head part,
The expansion groove includes a first curve and a second curve formed in the vertical direction around the injection hole,
The first curve and the second curve intersect each other, but the first curve is arranged to pass through the upper end of the injection hole, and the second curve is arranged to pass through the lower end of the injection hole,
An interval between the first curve and the second curve is formed to become narrower in a direction away from the injection hole,
A fire extinguisher provided with a spray nozzle in which first, second, and third internal flow paths are sequentially formed in the coupling part, the body part, and the head part. delete delete According to claim 1,
The first curve is a fire extinguisher provided with a spray nozzle having a curvature that sequentially connects a starting point formed on one side of the front end of the head part, an upper end point of the injection hole, and an end point formed on the other tip side of the head part. According to claim 1,
The second curve is a fire extinguisher provided with a spray nozzle having a curvature that sequentially connects a starting point formed on one side of the front end of the head part, a lower end point of the injection hole, and an end point formed on the other tip side of the head part. According to claim 1,
A cross-sectional reduction passage is formed between the second inner passage and the third inner passage,
A fire extinguisher provided with a spray nozzle having an inclined surface connecting the second internal flow path and the third internal flow path in the cross-sectional reduction flow path. According to claim 1,
The diameter of the injection hole is provided with a spray nozzle that satisfies the following relational expression.
0.29 ≤ a/d ≤ 0.323
(a: diameter of the injection hole, d: diameter of the inner flow path of the coupling part) According to claim 1,
The length of the head portion is a fire extinguisher equipped with a spray nozzle that satisfies the following relational expression.
0.275 ≤ b/l ≤ 0.325
(b: the length of the head, l: the total length of the spray nozzle)

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