CN216963400U - Low-temperature and vibration resistant fusible alloy spray head - Google Patents

Abstract

The invention relates to a low-temperature and vibration resistant fusible alloy nozzle, belonging to the technical field of fire-fighting safety fire-extinguishing products; the side wall of a spray head body (2) with a tubular structure is provided with spray holes, a hollow fusible alloy containing groove (3) with one end sealed and one end open is arranged at the front end of the spray head body, a fusible alloy block (1) is arranged in the fusible alloy containing groove and is propped and positioned by a push rod (4) arranged in the spray head body, the front end of the push rod is provided with an inner hole with the volume larger than that of the fusible alloy block, the bottom of the inner hole is provided with an exhaust hole, the rear end of the push rod is positioned by an elastic device (5) arranged in the spray head body, a passage between the spray holes and a fire inhibitor is blocked by sealing rings arranged in O-shaped grooves at the rear ends of the spray head body and the push rod, and the height of the fusible alloy block is larger than the axial distance between the O-shaped groove at the rear end of the push rod and the spray holes. This openly is through the hollow structure of ejector pin, and it holds the chamber to flow into it when making fusible alloy piece melt, and can not flow in the guard space, accomplishes really "not adding the trouble", makes this shower nozzle can use in the electrified environment.

Description

Low-temperature and vibration resistant fusible alloy nozzle

Technical Field

The utility model relates to the technical field of fire safety extinguishing products, in particular to a low-temperature and vibration resistant fusible alloy nozzle.

Background

The existing fire-fighting spray heads are various, wherein the fusible alloy spray heads and the temperature-sensing glass ball spray heads are widely used, and the common temperature-sensing glass ball starting spray heads are generally resistant to low temperature of minus 30 ℃, while the fusible alloy starting spray heads can be resistant to the temperature of minus 57 ℃ or even lower, and are more widely applied in colder environments based on the excellent low-temperature resistance of the fusible alloy.

The prior fusible alloy fire sprinkler head, such as publication number CN 208003307U, discloses a fusible alloy actuated sprinkler head. The spray head is common and widely applied to water spraying fire-fighting systems of residential buildings and warehouses. However, because of the structure, when the sprayer is started, the support metal part on the sprayer can fall into the protection area, and when the sprayer is used in places such as a battery box and an energy storage cabinet which have requirements on insulation, the metal part falling when the sprayer disclosed by the publication number CN 208003307U acts has the risk of short-circuiting the protected equipment. And this kind of shower nozzle leans on jackscrew to compress tightly the metal support shell fragment, maintains internal structure stable, and when receiving great impact vibration, the metal support shell fragment is out of shape easily to lead to system's malfunction.

SUMMERY OF THE UTILITY MODEL

To solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a fusible alloy showerhead capable of being used in severe places such as low temperature, high vibration frequency and charged environment.

The embodiment of the disclosure provides a fusible alloy nozzle, which comprises a nozzle body, a fusible alloy block, a fusible alloy holding tank, a push rod and an elastic device, wherein the side wall of the nozzle body with a tubular structure is provided with a plurality of spray holes, the spray holes are used for spraying a fire inhibitor, the hollow fusible alloy holding tank with one end sealed and the other end open is arranged at the front end of the nozzle body, the fusible alloy block is arranged at the sealing end of the fusible alloy holding tank and is propped and positioned by the push rod arranged in the nozzle body, the front end of the push rod is provided with an inner hole with the volume larger than that of the fusible alloy block, the bottom of the inner hole is provided with an exhaust hole communicated with the side wall of the push rod, the rear end of the push rod is positioned by the elastic device arranged in the nozzle body, and the fire inhibitor is prevented from being sprayed out of the spray holes by a sealing ring arranged in O-shaped grooves at the rear ends of the nozzle body and the push rod, the height of the fusible alloy block is larger than the axial distance between the O-shaped ring groove at the rear end of the ejector rod and the spray hole, so that after the fusible alloy block is melted, the spray hole becomes the fire inhibitor outlet after the ejector rod moves forward under the elastic action of the elastic device.

According to a specific implementation manner of the embodiment of the disclosure, a sealing ring is arranged between the part of the front end of the ejector rod, which is located in the fusible alloy containing groove, and is used for ensuring that the fusible alloy block completely flows into the cavity of the ejector rod after being melted.

According to a specific implementation manner of the embodiment of the disclosure, the front end of the spray head body is provided with a support-shaped structure with at least 3 stand columns, so that the temperature sensing of the sealing end of the fusible alloy containing tank is facilitated, the fusible alloy containing tank is a tubular structure with one end sealed, and the open end is used for the extension and retraction of the ejector rod; the appearance of the fusible alloy containing groove is matched with the inner shape of the support-shaped structure, so that the support-shaped structure can support the fusible alloy containing groove conveniently.

According to a specific implementation manner of the embodiment of the disclosure, the height of the fusible alloy containing tank is between the height of the fusible alloy block and the height of the stand column, the sealing end of the fusible alloy containing tank is of a hemispherical shell structure, the bottom of the support-shaped structure is of a hollowed-out hemispherical shell structure connected with at least 3 stand columns, and the inner shape of the support-shaped structure is of a conical structure.

According to a specific implementation manner of the embodiment of the disclosure, the front end of the spray head body is provided with an inner boss, the open end of the fusible alloy accommodating groove is provided with an outer boss, and the inner boss and the outer boss are matched to enable the fusible alloy accommodating groove to be installed at the front end of the spray head body.

According to a specific implementation of the embodiments of the present disclosure, the spray holes may be tapered for atomizing the fire suppressant.

According to a specific implementation manner of the embodiment of the disclosure, a micro atomizing nozzle can be also arranged in the spray hole and used for atomizing and spraying the fire inhibitor.

According to a specific implementation mode of the embodiment of the disclosure, the overall length of the miniature atomizing nozzle is not higher than 1 cm, the outer diameter is not higher than 8 mm, the drift diameter is not higher than 2 mm, and the opening gap is not higher than 0.5 mm.

According to a specific implementation of the embodiment of the present disclosure, the spring is positioned by a boss or a threaded nut in the spray head body.

According to a specific implementation manner of the embodiment of the disclosure, a filter screen is arranged at the end part of one side of the spring, which is far away from the ejector rod, and is used for filtering and blocking impurities from the fire inhibitor pipeline and preventing the spray holes from being blocked.

According to a specific implementation manner of the embodiment of the disclosure, the fusible alloy block is made of alloy with the melting point of 70 ℃, 95 ℃, 120 ℃ or 138 ℃, and the fusible alloy containing groove is made of metal with good heat conductivity.

According to a specific implementation manner of the embodiment of the disclosure, the fusible alloy accommodating groove is made of copper.

Advantageous effects

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

the fusible alloy nozzle provided by the embodiment of the disclosure can be used in a wider temperature range from-57 ℃ to +138 ℃, and the nozzle can be started at different environmental temperatures by selecting fusible alloys with different melting points. Meanwhile, the tail end of the ejector rod of the fusible alloy block is propped by the spring, so that the small creep deformation of the fusible alloy block generated when the fusible alloy block works in a vibration environment can be compensated, the structure is more reliable, and the false start is avoided. In addition, the fusible alloy block flows into the containing cavity when melted through the hollow structure of the ejector rod and cannot flow into the protection area, so that no trouble is really added, and the sprayer can be used in a live environment.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a fusible alloy nozzle provided in an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of yet another fusible alloy showerhead construction provided by an embodiment of the present disclosure;

FIG. 3 is a three-dimensional schematic diagram of the appearance structure of FIG. 2;

FIG. 4 is a schematic exterior view of a spray head body;

FIG. 5 is a schematic view of the appearance of the fusible alloy accommodating tank;

FIG. 6 is an external view of the jack;

FIG. 7 is a schematic external view of a tightening nut with a filter screen;

FIG. 8 is a schematic external view of a micro atomizer head;

FIG. 9 is a schematic view showing the outer appearance of a plurality of nozzle holes arranged circumferentially around the axis of the head body;

reference numerals: 1-a fusible alloy mass; 2-a spray head body; 3-a fusible alloy accommodating tank; 4-a top rod; 5-a resilient means; 6, filtering a screen; 7-screwing the nut; 8-micro atomizing spray head.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

In the description of the present disclosure, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used merely to facilitate the description of the disclosure and to simplify the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the disclosure. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of a quantity or relationship or order of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present disclosure, unless otherwise specified, "a plurality" means two or more, and "several" means one or more. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

In the description of the present disclosure, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art through specific situations.

For the purpose of illustrating the objects, technical solutions and advantages of the embodiments of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure.

The current by widely used fusible alloy start-up shower nozzle, like publication No. CN 208003307U, the support metalwork on the shower nozzle can drop in the protection zone, when using it in places such as battery box, energy storage cabinet that have the requirement to insulating nature, the risk that the metal parts that drop when this type of fire control shower nozzle action will be protected the equipment short circuit exists. And this type of shower nozzle leans on jackscrew to compress tightly the metal support shell fragment, maintains the internal structure stable, and when receiving great impact vibration, the metal support shell fragment is out of shape easily to lead to the system malfunction. To partially or fully solve the above problems, the present disclosure provides a fusible alloy nozzle, which is described in detail below.

Fig. 1 is a schematic structural view of a fusible alloy nozzle provided by an embodiment of the present disclosure, fig. 2 is a schematic structural section view of another fusible alloy nozzle provided by an embodiment of the present disclosure, fig. 3 is a schematic structural view of an external three-dimensional view of fig. 2, as shown in the figure, the fusible alloy nozzle includes a nozzle body 2, a fusible alloy block 1, a fusible alloy receiving tank 3, a push rod 4 and an elastic device 5, a plurality of orifices are opened on a side wall of the nozzle body 2 of a tubular structure for spraying a fire suppressant, the hollow fusible alloy receiving tank 3 with one end sealed and one end open is installed at a front end of the nozzle body 2, the fusible alloy block 1 is placed at a sealed end of the fusible alloy receiving tank 3 and is supported and positioned by the push rod 4 installed in the nozzle body 2, an inner hole with a volume larger than that of the fusible alloy block 1 is provided at the front end of the push rod 4, an exhaust hole communicated with a side wall of the push rod 4 is provided at the bottom of the inner hole, a rear end of the push rod 4 is positioned by the elastic device 5 installed in the nozzle body 2, the sealing rings arranged in the O-shaped grooves at the rear ends of the spray head body 2 and the ejector rod 4 are used for blocking a fire inhibitor passage between the spray holes and a fire inhibitor pipeline, the height of the fusible alloy block 1 is larger than the axial distance between the O-shaped groove at the rear end of the ejector rod 4 and the spray holes, and after the fusible alloy block 1 is melted, the ejector rod 4 moves forward under the action of elastic force stored by the elastic device 5 and then opens the passage between the spray holes and the fire inhibitor pipeline.

The ejector rod which can freely slide along the axial direction of the inner hole in the spray head body 2 is designed into a hollow cavity, namely, a cavity is accommodated, so that the fusible alloy block flows into the cavity when being melted and does not flow into a protection area, the spray head provided by the embodiment of the disclosure can be used in fire-fighting places such as ordinary residential buildings and warehouses, and no extra substances are added to the protection area except for spraying a fire inhibitor, so that 'no trouble is really added', and the spray head can also be used in charged environments such as a battery box, an energy storage cabinet and the like. And because the low temperature resistance of the fusible alloy is excellent, the starting of the spray head at different environmental temperatures can be realized by selecting the fusible alloys with different melting points according to different application environments, and particularly, the fusible alloy block 1 can be made of the fusible alloy with the melting point of 70 ℃, 95 ℃, 120 ℃ or 138 ℃ and the like, so that the fusible alloy block can be applied in a wider temperature range of-57 ℃ to +138 ℃.

As a specific example, the fusible alloy holding tank 3 is installed at the front end of the nozzle body 2 by matching the inner boss and the outer boss, that is, the inner boss is installed at the front end of the nozzle body 2, and the outer boss is installed at the opening end of the fusible alloy holding tank 3, as shown in fig. 1.

As a specific example, the fusible alloy holding tank 3 can be installed at the front end of the nozzle body 2 by installing a supporting seat at the front end of the nozzle body 2, as shown in fig. 4, the front end of the nozzle body 2 is provided with a support structure with at least 3 columns, such an open non-closed structure facilitates the temperature sensing of the sealing end of the fusible alloy holding tank 3, and correspondingly, the fusible alloy holding tank is designed to be a tubular structure with one sealed end, and the open end is used for the insertion of the ejector rod 4; the appearance of the fusible alloy holding tank 3 is matched with the inner shape of the support structure, so that the support structure can hold the fusible alloy holding tank 3 conveniently.

The 2 specific examples show the connection structure of the fusible alloy holding tank 3 and the spray head body 2, but not limited to this, and can also be designed as a structure that the fusible alloy holding tank 3 and the spray head body 2 are integrated, or a welding connection structure of the two, the 2 examples of the split structure provides convenience for processing and installation, is suitable for processing standardized parts, and the two are made of different materials, so that low cost and high functionality are realized.

Further, as shown in fig. 4, the shape of the bottom supporting portion of the support-shaped structure is a hollow-out semi-spherical shell structure connected with at least 3 columns, and the inner shape is a cone-shaped structure, i.e., the portion of the bottom inner shape of the support-shaped structure contacting with the sealing end of the fusible alloy accommodating groove is a cone-shaped structure; correspondingly, the sealing end of the fusible alloy accommodating tank 3 is of a hemispherical shell structure, as shown in fig. 5; the design is such that the support-shaped structure can stably support any sphere or ellipsoid just like 3 open fingers. The outer diameter of the fusible alloy holding tank 3 is matched with the inner diameter formed by at least 3 stand columns of the support-shaped structure, so that the fusible alloy holding tank 3 is prevented from shaking and inclining in the support-shaped structure. The height of the fusible alloy accommodating groove 3 is between that of the fusible alloy block 1 and that of the stand column, and the fusible alloy accommodating groove 3 is adjusted to be a proper height, so that the material consumption can be reduced, the maximum speed of the fusible alloy block 1 can be kept consistent with the ambient temperature, and the starting time of the whole sprayer is ensured.

In addition to the above embodiment, a sealing ring is further provided between the part of the front end of the push rod 4 located in the fusible alloy containing groove 3 and the fusible alloy containing groove 3, and correspondingly, as shown in fig. 6, an O-ring groove for preventing the sealing ring is provided at the front end of the push rod 4.

When the ejector rod 4 and the fusible alloy containing groove 3 are in clearance fit, the ejector rod and the fusible alloy containing groove cannot be completely attached, when the clearance is large enough to enable liquid fusible alloy to pass through, the fusible alloy possibly flows out to bring trouble to a protection area, and therefore the fusible alloy block 1 can be prevented from flowing out after being melted by arranging the sealing ring. The air vent hole at the bottom of the inner hole of the mandril 4 is communicated with the outside, but the inner diameter of the air vent hole is small enough to keep the air pressure inside and outside consistent, and the liquid fusible alloy cannot flow out through the air vent hole due to the surface tension of the liquid even when reaching the position of the air vent hole.

As a specific example, in order to better exert the effect of the fire retardant such as perfluorohexanone, the spray holes on the spray head body 2 are processed into a cone shape, so that the fire retardant can be atomized and sprayed out, and the purpose of rapidly absorbing the environmental heat and rapidly reducing the environmental temperature is achieved, thereby killing the fire at the germination stage.

Furthermore, in order to spray more fire inhibitors in a unit time, a plurality of spray holes can be uniformly distributed on the circumferential surface of the spray head body 2, as shown in fig. 9, when the spray head is opened, the fire inhibitors can be sprayed simultaneously within a range of 360 degrees; or a plurality of spray holes are arranged in a certain angle range, so that the fire inhibitor is sprayed to the protection area in the angle range in a concentrated mode.

As a specific example, a micro atomizing head 8 may be installed in the orifice of the head body 2 to improve the atomizing effect of the sprayed fire suppressant.

Because the spray head body 2 is not large, the length is about ten centimeters, the spray holes arranged on the outer circumference are very small, and only a micro atomization spray head can be arranged in the spray head body.

Furthermore, the whole length of the miniature atomizing nozzle is not higher than 1 cm, the outer diameter is not higher than 8 mm, the drift diameter is not higher than 2 mm, and the opening gap is not higher than 0.5 mm. Fig. 8 discloses a micro-atomizing nozzle, which is in threaded fit with a spray hole, wherein the threads are M4 metric threads, and the fan-shaped spray angle is 170 degrees. As shown in fig. 1 and 2, the nozzle hole of the nozzle body 2 is a stepped hole structure with a small inside and a large outside, and the large outermost step is in threaded fit with the micro atomization nozzle. The structure can ensure that the sprayed fire inhibitor is sprayed out after multistage outward expansion to achieve better atomization effect, thereby improving the fire extinguishing effect.

As a specific example, the fusible alloy accommodating tank 3 is made of a material having good thermal conductivity, such as copper. When the thermal conductivity of the material of the fusible alloy containing groove 3 is good, the spray head disclosed by the invention can keep the same with the ambient temperature at the fastest speed, when a fire situation occurs, the fusible alloy block 1 is melted at the first time, the ejector rod 4 moves downwards, and the fire inhibitor passage is opened, so that the fire inhibitor is sprayed from the spray holes to extinguish the fire, and the loss caused by temperature sensing delay and spray head start lag is avoided.

As a specific example, the elastic means 5 is provided as a spring.

The spring is used as an elastic device, the problem that ejector rods are unreliable due to elastic structures such as elastic sheets can be avoided, and the precompressed spring can compensate small creep deformation of the fusible alloy block 1 in the working process in a vibration environment, so that the structure is more reliable, and false starting is avoided.

Further, as shown in fig. 1 and fig. 2, a filter screen 6 is disposed at an end of the spring away from the rod 4 to filter and block impurities in the fire suppressant pipe, so as to prevent the nozzle or the micro atomizing nozzle from being blocked.

As a specific example, the end of the spring away from the top rod 4 can be positioned by tightening the nut 7, as shown in FIG. 1, that is, one end of the spring is against the top rod 4 and the other end is against the tightened nut, so that the spring is stably positioned and has a good pre-tightening force.

Further, the filter screen 6 and the tightening nut 7 can be integrated into a whole, as shown in fig. 7.

As a specific example, the material of the nozzle body 2, the ejector rod 4, the filter screen 6, the screwing nut 7 and the micro atomizing nozzle 8 is hard metal, so as to ensure the rigidity of the nozzle of the present disclosure. The elastic means 5 is made of elastic metal, ensuring its strength and high melting point. The sealing ring is made of heat-resistant rubber.

As a specific example, the tail of the nozzle body 2, i.e. the rear end of the nozzle body 2, is a standard pipe joint interface, such as a ferrule type joint, a crimping type pipe joint, etc., and can be connected with a standard pipe joint.

When the fusible alloy spray nozzle works, the fusible alloy spray nozzle is arranged on a pipeline with pressure or without pressure, at the moment, the fusible alloy block in the spray nozzle props against the ejector rod, and two forces at two ends of the ejector rod are balanced by the thrust of the fusible alloy block and the spring respectively to keep a static state. And the position of the O-shaped ring at the rear end of the ejector rod is behind the inlet of the miniature atomizing nozzle arranged on the nozzle body, so that the nozzle is in a normally closed state.

When the temperature of the protection area reaches the melting point temperature of the fusible alloy block in the nozzle (the melting point has various choices of 70 ℃, 95 ℃, 120 ℃, 138 ℃ and the like), the fusible alloy block of the nozzle can be melted and flows into the cavity of the ejector rod. Because the volume of the cavity of the ejector rod is larger than that of the fusible alloy block, and the part of the front end of the ejector rod, which extends into the fusible alloy containing groove, is filled with rubber material fillers, the liquid fusible alloy cannot flow out of the gap when the ejector rod moves in the fusible alloy containing groove. The ejector rod loses the support of the front fusible alloy block in the process of melting the fusible alloy block, and the rear end of the ejector rod moves forwards under the thrust of the pressure of the spring and the fire inhibitor in the pipe, so that the O-shaped ring at the rear end of the ejector rod passes through the inlet of the miniature atomizing nozzle arranged on the nozzle body. At the moment, the liquid in the pipeline can be released into the protection area through the screwed nut with the filter screen, the micro atomizing nozzle mounting hole on the nozzle body and the micro atomizing nozzle. And by selecting the micro atomizing nozzle components with different specifications, the nozzle can be sprayed out in different forms such as a fan-shaped plane, a solid conical surface, a hollow conical surface and the like according to requirements.

The utility model provides a shower nozzle, stable in structure, the manufacturability is good, and component parts easily processes, easy dismounting. The problem that the existing spray head is additionally troublesome to the protection area is solved through the design of the ingenious hollow ejector rod, and the spray head disclosed by the invention can be used in an electrified environment without worry. Further, the structure of the spray head is more stable and reliable through the use of the spring, and the false start caused by factors such as vibration is avoided. And because the fusible alloy is selected as the starting element, the spray head can be used in a wider temperature range of minus 57 ℃ to plus 138 ℃, and the spray head can be started at different environmental temperatures by selecting the fusible alloys with different melting points, so that the spray head disclosed by the invention has better wide applicability.

The previous description is only for the purpose of describing particular embodiments of the present disclosure, so as to enable those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A fusible alloy nozzle is characterized by comprising a nozzle body, a fusible alloy block, a fusible alloy containing groove, a push rod and an elastic device, wherein the side wall of the nozzle body of a tubular structure is provided with a plurality of spray holes, the spray holes are used for spraying a fire inhibitor, the fusible alloy containing groove with one end sealed and one end open is arranged at the front end of the nozzle body, the fusible alloy block is arranged at the sealing end of the fusible alloy containing groove and is propped against and positioned by the push rod arranged in the nozzle body, the front end of the push rod is provided with an inner hole with the volume larger than that of the fusible alloy block, the bottom of the inner hole is provided with an exhaust hole communicated with the side wall of the push rod, the rear end of the push rod is positioned by the elastic device arranged in the nozzle body, the fire inhibitor is separated from the spray holes by sealing rings arranged in O-shaped grooves at the rear ends of the nozzle body and the push rod, the height of the fusible alloy block is larger than the axial distance between the O-shaped ring groove at the rear end of the ejector rod and the spray hole, so that after the fusible alloy block is melted, the spray hole becomes the fire inhibitor outlet after the ejector rod moves forward under the action of the elastic force of the elastic device.

2. The spray head of claim 1, wherein the front end of the spray head body is provided with a support structure with at least 3 columns to facilitate temperature sensing at the sealed end of the fusible alloy accommodating tank, the fusible alloy accommodating tank is a tubular structure with a sealed end, and the open end is used for inserting the ejector rod; the appearance of the fusible alloy containing groove is matched with the inner shape of the support-shaped structure, so that the support-shaped structure can support the fusible alloy containing groove conveniently.

3. The showerhead of claim 2, wherein the height of the fusible alloy receiving tank is between the height of the fusible alloy slug and the height of the posts, the sealing end of the fusible alloy receiving tank is a hemispherical shell structure, the bottom of the pedestal structure is a hollowed-out hemispherical shell structure connected to at least the 3 posts, and the interior of the pedestal structure is a tapered structure.

4. The spray head of claim 1 wherein the front end of the spray head body is provided with an inner boss and the open end of the fusible alloy receiving tank is provided with an outer boss, the inner and outer bosses mating to mount the fusible alloy receiving tank to the front end of the spray head body.

5. The nozzle of any one of claims 1 to 4, wherein a sealing ring is provided between the part of the front end of the carrier rod located in the fusible alloy receiving groove and the fusible alloy receiving groove.

6. The spray head of any one of claims 1 to 4 wherein said orifices are tapered for atomizing said fire suppressant.

7. The spray head of any one of claims 1 to 4, wherein a miniature atomiser is provided in said orifice for atomising said fire suppressant.

8. The spray head of claim 7, wherein the overall length of the micro spray nozzle is not higher than 1 cm, the outer diameter is not higher than 8 mm, the drift diameter is not higher than 2 mm, and the opening gap is not higher than 0.5 mm.

9. The spray head according to any one of claims 1 to 4, wherein the elastic means is a spring, and a filter screen is provided at an end portion of the spring away from the top bar.

10. The showerhead of any of claims 1-4, wherein the mass of fusible alloy is made of an alloy having a melting point of 70 ℃, 95 ℃, 120 ℃ or 138 ℃, and the mass of the fusible alloy receiving tank is copper.

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