CN116236735A - High pressure water mist nozzle - Google Patents

Abstract

The application provides a high-pressure fine water mist nozzle, which relates to the technical field of fire-fighting equipment and is used to solve the problem of poor spray effect of the high-pressure fine water mist nozzle. The high-pressure water mist nozzle provided by the application includes a nozzle body, a swirl vane and a nozzle body, a fluid chamber is arranged in the nozzle body, and the water inlet side of the fluid chamber is used to connect with an external pipeline; the swirl vane is installed on the A first spiral groove is opened in the fluid chamber and its outer peripheral side; the nozzle body is installed on the nozzle body and is close to the water outlet side of the fluid chamber, the nozzle body includes a nozzle housing and a swirl body, and the nozzle housing The body is provided with a swirl cavity and a spray hole which are connected with the fluid chamber in turn, the swirl fluid is arranged in the swirl cavity, and a second spiral groove is opened on its outer peripheral side, and the fluid flows through the first spiral groove in sequence and the second spiral groove for centrifugal atomization. The application can improve the spraying effect of the high-pressure fine water mist spray head.

Description

High pressure water mist nozzle

technical field

The present application relates to the technical field of fire-fighting equipment, in particular to a high-pressure fine water mist nozzle.

Background technique

As a new, green and environmentally friendly fire extinguishing technology, water mist fire extinguishing technology is widely used in different industries and fields. Its use is not limited by the place, and it is effective for the protection of high-risk areas and confined spaces. For example, water mist fire extinguishing can be used in petrochemical industry, coal industry, food, medicine, archives, construction, subway, tunnel, ship, aerospace, electric power, electronic industry, etc. The high-pressure water mist nozzle mainly achieves the effect of extinguishing the fire through multiple principles such as cooling, oxygen insulation, evaporation and heat absorption, and will not leave more water stains on the burning surface, which can prevent equipment from being damaged due to excessive water immersion. Reduce economic loss.

In recent years, with the development of technology, different types of high-pressure water mist nozzle products emerge in an endless stream, but the problem of poor spray effect has not been properly resolved.

Contents of the invention

The present application provides a high-pressure fine water mist nozzle to solve the technical problem of poor spray effect of the high-pressure fine water mist nozzle.

The application provides a high-pressure water mist nozzle, including:

The nozzle body is provided with a fluid chamber inside, and the water inlet side of the fluid chamber is used for connecting with an external pipeline;

A swirl vane is installed in the fluid chamber and has a first helical groove on its outer circumference;

The nozzle body is installed on the nozzle body and is close to the water outlet side of the fluid chamber. The nozzle body includes a nozzle housing and a swirl body. The nozzle housing is provided with a swirl chamber and a swirl chamber that communicate with the fluid chamber in turn. In the spray hole, the swirl fluid is arranged in the swirl cavity, and a second spiral groove is opened on the outer peripheral side thereof, and the fluid flows through the first spiral groove and the second spiral groove in sequence for centrifugal atomization.

In some embodiments of the present application, the first helix angle β1 of the first helical groove is less than or equal to the second helix angle β2 of the second helical groove.

In some embodiments of the present application, the first helix angle β1 and the second helix angle β2 satisfy: β1=(0.5˜1.0)×β2.

In some embodiments of the present application, the direction of rotation of the first helical groove is the same as that of the second helical groove, and the number of grooves Z1 of the first helical groove is greater than the number of grooves of the second helical groove Z2.

In some embodiments of the present application, the fluid chamber includes a cylindrical chamber and a tapered chamber, the end of the cylindrical chamber away from the tapered chamber is configured as the water inlet side, the The large mouth end of the tapering chamber communicates with the cylindrical chamber, the swirl vane is installed in the cylindrical chamber, and its end face facing away from the water inlet side extends into the tapering chamber or flush with the wide end of the tapered chamber.

In some embodiments of the present application, a plurality of mounting holes communicating with the tapering chamber are provided on the wall of the tapering chamber, wherein the nozzle body is mounted in the mounting holes.

In some embodiments of the present application, the nozzle body further includes a flow channel body installed in the swirl cavity, the flow channel body has a fluid flow channel, and its outer periphery is provided with external threads, the swirl flow An internal thread matched with the external thread is provided in the cavity, and the flow channel body is used to fix the swirl body in the nozzle housing.

In some embodiments of the present application, the swirl body includes a tapered part and a cylindrical rod-shaped part, and the cylindrical rod-shaped part protrudes into the fluid flow channel and defines a first flow channel with the inner wall of the fluid flow channel , the flow channel body has an abutting side close to the tapered portion, the connection between the tapered portion and the cylindrical rod-shaped portion has a stepped surface, and the abutting side abuts against the stepped surface .

In some embodiments of the present application, the nozzle hole includes a tapered hole section communicating with the swirl chamber, the tapered hole section is tapered in a direction away from the swirl chamber, and the cone The tapered portion is adapted to the tapered hole section, and the side of the tapered portion close to the cylindrical rod-shaped portion does not extend into the tapered hole section.

In some embodiments of the present application, the abutting side of the flow channel body is hollow cylindrical, and its outer diameter is smaller than the inner diameter of the swirl chamber, and a communication groove is opened on the abutting side of the flow channel body, The communication groove communicates with the swirl chamber and the fluid channel.

In some embodiments of the present application, the high-pressure water mist spray head also includes:

The filter element is installed in the cylindrical chamber and is closer to the water inlet side than the swirl vane, wherein the water inlet side of the cylindrical chamber is provided with an internal connecting thread, and the The internal connecting thread is used for threaded connection with the external pipeline.

In some embodiments of the present application, the inner peripheral side of the cylindrical chamber is provided with a retaining ring groove and a positioning groove connected to each other. The diameter of the retaining ring groove is larger than the diameter of the positioning groove and is located in the positioning groove. The side of the groove facing away from the swirling vane, the filter element is disc-shaped, and the high-pressure water mist spray head also includes a circlip, and the circlip is interference fit in the groove of the circlip, In order to limit the filter element in the positioning groove along the axial direction of the cylindrical chamber.

The application has the following beneficial effects:

When the above-mentioned high-pressure water mist nozzle of the present application is used specifically, the fluid enters the fluid chamber from the water inlet side of the fluid chamber through the external pipeline, and the radial momentum of the spray is increased through the first spiral groove on the swirl blade installed in the fluid chamber , strengthen the impact between the droplets and between the droplets and the inner wall of the fluid chamber, and tear the fluid into filaments, ribbons or small droplets through the swirling flow, so that the fluid can achieve the first time under the action of the swirling blade. Uniform centrifugal atomization. Subsequently, the fluid flows out from the water outlet side of the fluid chamber and enters the nozzle body, and passes through the second spiral groove installed on the swirl body in the swirl chamber of the nozzle housing, further strengthening the contact between the droplets and the swirl chamber. The impact between the inner wall and the inner wall of the spray hole makes the fluid achieve secondary uniform atomization under the action of the swirling fluid. That is, when the fluid flows through the above-mentioned high-pressure water mist nozzle, it undergoes two centrifugal atomization and then is sprayed through the nozzle hole, thereby improving the spraying effect of the high-pressure water mist nozzle.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is a cross-sectional view of a high-pressure water mist nozzle in an embodiment of the present application;

Fig. 2 is the perspective view of the swirl vane in the high pressure water mist nozzle in the embodiment of the present application;

Fig. 3 is a cross-sectional view of the nozzle body in the high-pressure water mist spray head in the embodiment of the present application;

Fig. 4 is a perspective view of the swirling fluid in the nozzle body in the embodiment of the present application;

Fig. 5 is a perspective view of a high-pressure water mist nozzle in an embodiment of the present application;

Fig. 6 is a top view of the high-pressure water mist nozzle in the embodiment of the present application;

Fig. 7 is a perspective view of the flow channel body in the nozzle body in the embodiment of the present application.

The main reference signs in the accompanying drawings of this application specification are explained as follows:

1-Nozzle body; 11-Fluid chamber; 111-Cylinder chamber; 112-Taper chamber; 12-Installation hole;

2-swirl blade; 21-the first spiral groove;

3-nozzle body; 31-nozzle shell; 311-swirl cavity; 312-nozzle; 3121-tapered hole section; 3122-straight hole section; 3123-divergent hole section; 32-swirl fluid; 321-second Spiral groove; 322-conical part; 323-cylindrical rod-shaped part; 324-step surface; 33-flow channel body; 331-fluid flow channel; 35 - the second runner;

4-filter;

5 - Retaining ring.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application. In addition, it should be understood that the specific implementations described here are only used to illustrate and explain the present application, and are not intended to limit the present application. In this application, unless stated otherwise, the used orientation words such as "up", "down", "left", and "right" usually refer to the upper, lower, and left sides in the actual use or working state of the device. and right, specifically the direction of the drawing in the attached drawing.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features.

The present application provides a high-pressure fine water mist nozzle, which will be described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments of the present application. And in the following embodiments, the description of each embodiment has its own focus, and for the part not described in detail in a certain embodiment, you can refer to the relevant descriptions of other embodiments.

Fig. 1 is a cross-sectional view of the high-pressure water mist nozzle in the embodiment of the present application, Fig. 2 is a perspective view of the swirl blade in the high-pressure water mist nozzle in the embodiment of the present application, and Fig. 3 is a high-pressure water mist nozzle in the embodiment of the present application A cross-sectional view of the nozzle body, FIG. 4 is a perspective view of the swirling fluid in the nozzle body in the embodiment of the present application.

Referring to FIGS. 1 to 4 , the high-pressure water mist spray head provided by the present application includes a nozzle body 1 , a swirl blade 2 and a nozzle body 3 . Wherein, the nozzle body 1 is provided with a fluid chamber 11, and the water inlet side of the fluid chamber 11 is used for connecting with an external pipeline. The swirl blade 2 is installed in the fluid chamber 11 and has a first helical groove 21 on its outer peripheral side. The nozzle body 3 is installed on the nozzle body 1 and is close to the water outlet side of the fluid chamber 11. The water outlet side of the fluid chamber 11 is opposite to the water inlet side of the fluid chamber 11. The nozzle body 3 Including a nozzle housing 31 and a swirl body 32, the nozzle housing 31 is provided with a swirl cavity 311 and a spray hole 312 which are sequentially communicated with the fluid chamber 11, the swirl body 32 is arranged in the swirl cavity 311, And a second helical groove 321 is opened on the outer peripheral side thereof, and the fluid flows through the first helical groove 21 and the second helical groove 321 in sequence for centrifugal atomization and then sprays through the spray hole 312 .

When the above-mentioned high-pressure water mist spray head of the present application is used specifically, the fluid enters the fluid chamber 11 from the water inlet side of the fluid chamber 11 through an external pipeline, and passes through the first spiral groove on the swirl blade 2 installed in the fluid chamber 11 21 Increase the radial momentum of the spray, strengthen the impact between the droplets and the inner wall of the fluid chamber 11, and tear the fluid into filaments, ribbons or small droplets through the swirling flow, so that the fluid is in the Under the action of the swirl blade 2, the initial uniform centrifugal atomization is realized. Subsequently, the fluid flows out from the water outlet side of the fluid chamber 11 and enters the nozzle body 3, and passes through the second spiral groove 321 on the swirl body 32 installed in the swirl chamber 311 of the nozzle housing 31, further strengthening the flow between the droplets and the mist. The impact between the droplet and the inner wall of the swirl cavity 311 and the inner wall of the spray hole 312 makes the fluid achieve secondary uniform atomization under the action of the swirl body 32 . That is, when the fluid flows through the above-mentioned high-pressure fine water mist nozzle, it undergoes two centrifugal atomizations and then is sprayed out through the nozzle hole 312, thereby improving the spraying effect of the high-pressure fine water mist nozzle.

Continuing to refer to FIG. 2 and FIG. 4 , the first helix angle β1 of the first helical groove 21 is less than or equal to the second helix angle β2 of the second helical groove 321 . That is, β2≥β1. Thus, compared with the first helix angle β1 of the first helical groove 21 in the swirl vane 2, the increase of the second helix angle β2 of the second helical groove 321 on the swirl body 32 can increase the atomization angle of the swirl body 32 , to further atomize the droplets to form smaller droplets.

More specifically, the first helix angle β1 of the first helical groove 21 in the swirl blade 2 and the second helix angle β2 of the second helical groove 321 on the swirl body 32 satisfy: β1=(0.5～1.0) ×β2. If the first helix angle β1<0.5×β2, that is, the first helix angle β1 of the first helical groove 21 in the swirl vane 2 is small, which may cause the swirl vane 2 to have a weak effect on the primary swirl flow of the fluid . If the first helix angle β1>1.0×β2, the axial momentum of the swirl body 32 will be relatively small, and the speed of the spray will decrease when the swirl body 32 is ejected. The axial speed is small, and it is difficult to reach the fire area or penetrate, resulting in poor fire extinguishing effect.

That is, when the first helix angle β1 of the first helical groove 21 in the swirl blade 2 and the second helix angle β2 of the second helical groove 321 on the swirl body 32 satisfy: β1=(0.5～1.0)× When β2, on the basis of the good primary swirl effect of the swirl vane 2, the velocity of the fluid when ejected through the swirl fluid 32 is high, and it is easier to reach or penetrate the fire area, and the fire extinguishing effect is good. For example, the first helix angle β1 of the first helical groove 21 in the above-mentioned swirl blade 2 is 30°, the height of the first helical groove 21 is 8 mm, and the second helical angle β1 of the second helical groove 321 on the swirl body 32 is 30°. The angle β2 is 45°, and the height of the second spiral groove 321 is 2mm.

In some embodiments of the present application, the direction of rotation of the first helical groove 21 is the same as that of the second helical groove 321 , if the direction of rotation of the first helical groove 21 is the same as that of the second helical groove If the direction of rotation of 321 is reversed, the swirl effect of the swirl vane 2 and the nozzle body 3 will be canceled or weakened, resulting in a decrease in the radial kinetic energy of the fluid. Thus, it is ensured that the direction of rotation of the first helical groove 21 is the same as that of the second helical groove 321, which can strengthen the swirl effect of the swirl vane 2 and the nozzle body 3, which is beneficial to increase the radial kinetic energy and Increase the spray angle. The groove number Z1 of the first helical groove 21 is greater than the groove number Z2 of the second helical groove 321, too much groove number Z2 of the second helical groove 321 may aggravate the collision aggregation between the droplets, which is not conducive to For the refinement of the mist, the groove number Z2 of the second spiral groove 321 close to the spray hole 312 should not be too much. That is to say, compared with the swirl blade 2 of the swirl body 32, the groove number Z2 of the second helical groove 321 on the swirl body 32 is reduced, and the increase of the second helix angle β2 can increase the atomization angle, thereby realizing Larger atomization angle of high-pressure water mist nozzle.

In addition, referring to Fig. 2 and Fig. 4, the groove number Z1 of the first helical groove 21 and the groove number Z2 of the second helical groove 321 are proportional to the fluid flux, and the greater the fluid flux, the larger the first helical groove The number of grooves Z1 of 21 and the number of grooves Z2 of the second helical groove 321 are large, and the number of grooves Z1 of the first helical groove 21 and the number of grooves Z2 of the second helical groove 321 are small if the fluid flux is small, and The groove number Z1 of the first helical groove 21 and the groove number Z2 of the second helical groove 321 are uniformly distributed on the circumference. Wherein, the groove number Z1 of the first helical groove 21 is 3-6, and the groove number Z2 of the second helical groove 321 is 2-3. For example, six first helical grooves 21 of the same size and vertically penetrating through the swirl blade 2 are provided on the swirl blade 2 , and the pitch of the first helical grooves 21 is 48 mm. Above-mentioned swirling body 32 comprises conical part 322 and cylindrical rod-shaped part 323, and promptly swirling fluid 32 is roughly umbrella-shaped structure, and on its conical part 322 (being umbrella part), evenly distributes 3 in the vertical direction and runs through described conical part. The second spiral groove 321 of the part 322. The pitch of the second helical groove 321 is 8 mm.

Continuing to refer to FIG. 1 , the fluid chamber 11 includes a cylindrical chamber 111 and a tapered chamber 112 , the end of the cylindrical chamber 111 away from the tapered chamber 112 is configured as the water inlet side, so The large mouth end of the tapered chamber 112 is close to the cylindrical chamber 111 and communicates with the cylindrical chamber 111. The swirl vane 2 is installed in the cylindrical chamber 111 and faces away from the cylindrical chamber 111. The end surface of the water inlet side (the end surface facing the tapering chamber 112, that is, the top end surface of the swirl vane 2 shown in FIG. 1 ) extends into the tapering chamber 112 or is in contact with the The large mouth end of the tapering chamber 112 is flush, and after the fluid flows out through the swirl blade 2, it rotates and mixes at a high speed in the tapering chamber 112, and the liquid film becomes very unstable under the action of inertial force, and is further broken into filaments , ribbons or even small droplets. It should be noted that the direction indicated by the arrow in FIG. 1 is the flow direction of the fluid, and the side where the fluid first enters the cylindrical chamber 111 is the water inlet side of the cylindrical chamber 111 .

It can be understood that the above-mentioned fluid chamber 11 shrinks gradually from the water inlet side to the water outlet side, and the fluid chamber 11 is a straight section between the water inlet side and the swirl blade 2 (ie, a cylindrical chamber 111 ), and the fluid chamber 11 is in the swirl Between the flow vane 2 and the nozzle body 3 is a constriction section (that is, the tapered chamber 112 ), and the swirl vane 2 is interference-fitted in the straight section, so that the installation of the swirl vane 2 is relatively simple and convenient.

Fig. 5 is a perspective view of the high-pressure fine water mist nozzle in the embodiment of the present application, and Fig. 6 is a top view of the high-pressure fine water mist nozzle in the embodiment of the present application. Referring to Fig. 1, Fig. 5 and Fig. 6, a plurality of mounting holes 12 communicating with the tapering chamber 112 are provided on the wall surface of the tapering chamber 112, wherein the nozzle body 3 is mounted on the mounting hole 12. In the hole 12, that is, the nozzle body 1 is provided with a plurality of nozzle bodies 3, and because the wall surface of the tapered chamber 112 is inclined, and the angle between its extension trend and the central axis C of the fluid chamber 11 is Acute angle, so that the spraying directions of the plurality of nozzle bodies 3 arranged thereon are different, so as to increase the atomization angle of the high-pressure fine water mist spray head. Wherein, the opening direction of the installation hole 12 of the tapered chamber 112 is perpendicular to the wall of the tapered chamber 112 .

Exemplarily, seven nozzle bodies 3 are arranged on the wall surface of the above-mentioned tapering chamber 112 in total, wherein six nozzle bodies 3 that are annular and evenly distributed around the central axis C are arranged on the outer peripheral wall surface of the above-mentioned tapering chamber 112 , A nozzle body 3 collinear with the central axis C is provided on the top wall of the tapered chamber 112 . In some embodiments, the above-mentioned mounting hole 12 is a step hole, and the outer contour of the corresponding nozzle housing 31 matches the mounting hole 12 and is also stepped, which facilitates the positioning and installation of the nozzle body 3 and prevents the nozzle body 3 from being eccentric. The body 31 is interference fit in the stepped installation hole 12 .

Fig. 7 is a perspective view of the flow channel body in the nozzle body in the embodiment of the present application. 3 and 7, the nozzle body 3 also includes a flow channel body 33 installed in the swirl cavity 311, the flow channel body 33 has a fluid flow channel 331, and its outer periphery is provided with external threads, The swirl cavity 311 is provided with an internal thread matching the external thread, and the flow channel body 33 is used to fix the swirl fluid 32 in the nozzle housing 31, that is, the swirl fluid 32 passes through the flow The threaded connection between the channel body 33 and the nozzle housing 31 is fixed in the nozzle housing 31 . During specific installation, the swirl body 32 is first put into the nozzle housing 31, and then the flow channel body 33 is screwed into the nozzle housing 31, so that the swirl body 32 is positioned between the flow channel body 33 and the nozzle housing 31. between the nozzle housings 31 . It can be understood that the fluid channel 331 has a hexagonal prism structure, so that during installation, an Allen wrench can be inserted into the fluid channel 331 and then screwed into the nozzle housing 31 .

The swirling body 32 includes a tapered part 322 and a cylindrical rod-shaped part 323, the cylindrical rod-shaped part 323 protrudes into the fluid flow channel 331 and defines a first flow channel 34 with the inner wall of the fluid flow channel 331, The first channel 34 is substantially ring-shaped, and the channel body 33 has an abutting side 332 close to the tapered portion 322 , and the junction of the tapered portion 322 and the cylindrical rod-shaped portion 323 has a stepped surface 324 , the abutting side 332 abuts against the stepped surface 324 . That is, the above-mentioned swirl body 32 is an umbrella-shaped structure, which includes an umbrella portion (conical portion 322) and an umbrella handle portion (cylindrical rod-shaped portion 323), and the umbrella handle portion extends into the fluid flow channel 331. On the one hand, there are It is beneficial to the positioning and installation of the swirl body 32 , and on the other hand, it can form an annular flow channel 34 with the fluid flow channel 331 , which can enhance the swirl effect of the fluid flowing out through the swirl blade 2 . It can be understood that the interference fit between the umbrella head and the nozzle housing 31 is connected and fixed, and the flow channel body 33 is pressed between the nozzle housing 31 and the flow channel body 33 to ensure the swirl body 32. The installation is stable and reliable.

Wherein, the nozzle hole 312 includes a tapered hole section 3121 communicating with the swirl chamber 311, the tapered hole section 3121 tends to taper away from the swirl chamber 311, and the tapered portion 322 is adapted to the tapered hole section 3121 , and the side of the tapered portion 322 close to the cylindrical rod-shaped portion 323 does not extend into the tapered hole section 3121 . It can also be understood that the side of the tapered portion 322 close to the cylindrical rod-shaped portion 323 is lower than the large hole end of the tapered hole segment 3121 , and the tapered portion 322 faces away from the cylindrical rod-shaped portion One side of 323 is lower than the small hole end of the tapered hole section 3121, and the tapered hole section 3121 can ensure that the liquid droplets are sprayed at a high speed after passing through the small hole, so as to realize the conversion of liquid pressure potential energy to kinetic energy, A strong shearing action can be formed between the liquid droplets and the gas in the environment to achieve a better atomization effect.

In addition, along the flow direction of the fluid, the nozzle hole 312 sequentially includes a tapered hole section 3121 , a straight hole section 3122 and a diverging hole section 3123 . Among them, the diameter of the straight hole section 3122 is 0.4 mm to 0.6 mm, which requires high processing precision, so that a high spraying speed can be formed in practical applications.

Wherein, the abutting side 332 of the flow channel body 33 is hollow cylindrical, and its outer diameter is smaller than the inner diameter of the swirl cavity 311, and the abutting side 332 of the flow channel body 33 is provided with a communication groove 333, so The communication groove 333 communicates with the swirl cavity 311 and the fluid channel 331 as a fluid channel, and the abutting side 332 of the flow channel body 33 is not in contact with the swirl cavity 311, and the fluid flows through the first After the flow channel 34 passes through the communication groove 333 of the flow channel body 33, it enters the narrow and roughly annular second flow channel 35 surrounded by the nozzle housing 31, the flow channel body 33 and the swirl body 32, and the fluid The flow in the second channel 35 is further fully mixed and squeezed into the second helical groove 321 of the swirling body 32 to improve the atomization effect of the fluid in the second helical groove 321 .

Continuing to refer to Fig. 1, the high-pressure fine water mist spray head provided by the present application also includes a filter element 4, which is a disc-shaped filter screen, which is installed in the cylindrical chamber 111 and will not increase the pressure of the high-pressure fine water mist. The volume of the mist nozzle takes up less space. Wherein, the water inlet side of the cylindrical chamber 111 is provided with internal connecting threads, and the internal connecting threads are used for threaded connection with the external pipeline. More specifically, the above-mentioned internal connecting thread is a tapered thread, and the sealing effect of the tapered thread is better than that of the straight thread, which can improve the sealing of the connection between the water inlet side of the cylindrical chamber 111 and the external pipeline. performance. In some embodiments, a clamping portion is provided on the outer periphery of the nozzle body 1, and when the water inlet side of the cylindrical chamber 111 is screwed to the external pipeline, the The nozzle body 1 exerts external force to tighten the two together. Exemplarily, at least a partial section of the outer circumference of the nozzle body 1 is in a prismatic structure.

In some embodiments of the present application, the inner peripheral side of the cylindrical chamber 111 is provided with a retaining ring groove and a positioning groove, and the diameter of the retaining ring groove is larger than the diameter of the positioning groove and compared with the positioning groove. The groove is close to the water inlet side, the filter element 4 is disc-shaped, and the high-pressure water mist spray head also includes a circlip 5, and the circlip 5 is interference fit in the groove of the circlip, so as to The filter element 4 is limited in the positioning groove along the axial direction of the cylindrical chamber 111, and the circlip 5 is relatively easy to disassemble because of its elasticity, thereby ensuring that the filter element 4 is convenient to clean and reduces the filtration rate. The maintenance difficulty of piece 4.

The high-pressure water mist nozzle provided by the application has at least the following beneficial effects:

The high-pressure water mist spray head includes a nozzle body 1 , a swirl vane 2 , a nozzle body 3 , a filter element 4 and an elastic retaining ring 5 for holes. Wherein, the nozzle body 3 includes a nozzle housing 31 , a swirl body 32 and a flow channel body 33 . The nozzle housing 31 is provided with a swirl chamber 311 , and an internal connecting thread is provided at the bottom thereof to complete the connection between the high-pressure fine water mist nozzle and the external pipeline. A retaining ring groove and a position-limiting positioning groove are sequentially arranged on the top of the internal connecting thread, and the displacement of the filter element 4 along the flow direction of the fluid can be restricted by the shoulder of the positioning groove. The bottom of the positioning groove communicates with the retaining ring groove, and its diameter is smaller than the diameter of the retaining ring groove, and the diameter of the positioning groove is greater than that of the subchamber where the cylindrical chamber 111 is located between the filter element 4 and the elastic retaining ring 5 The diameter, that is, a step surface for limiting or positioning is formed between the top of the positioning groove and the cylindrical chamber 111 . When the circlip 5 is installed in the groove of the circlip, the displacement of the filter element 4 along the opposite direction of fluid flow can be realized through the circlip 5 .

Thus, when the fluid enters the flow channel formed by the fluid chamber 11 from the water inlet side of the nozzle body 1, it will be filtered by the filter element 4 and centrifugally atomized by the swirl vane 2 for the first time, and then enter the tapered chamber 112 and then inject into 7 nozzle bodies 3, sprayed out from the jet nozzle hole 312 after secondary atomization by the nozzle body 3. The specific performance is: after the high-pressure water is filtered by the filter element 4, it shoots to the spiral groove type swirl blade 2, and under the guidance of the first spiral groove 21, on the one hand, the fluid is torn into filaments and ribbons through the swirl. Or in the form of small droplets, on the other hand, the tangential kinetic energy of the fluid increases, hits the wall surface of the tapering chamber 112 at a higher speed, and injects into each nozzle body 3 after fully mixing the flow in the tapering chamber 112, and then flows The communication groove 333 of the channel body 33 enters and sequentially passes through the first flow channel 34 jointly defined by the cylindrical rod-shaped portion 323 of the swirl body 32 and the fluid flow channel 331 for the second mixed flow, and the nozzle housing 31. The second channel 35 composed of the channel body 33 and the swirl body 32 performs the third mixed flow. After the mixed flow is sufficient, the secondary centrifugal atomization is performed through the second spiral groove 321 of the cyclone body 32 to form smaller droplets. The secondary atomized fluid is fully mixed for the fourth time in the conical hole section 3121 close to the nozzle hole 312, and then is injected at high speed through the straight hole section 3122 with a smaller diameter and then diverges in the divergent hole section 3123 to form particles Fine mist, thus improving the atomization effect of high-pressure water mist nozzles on high-pressure water flow.

The high-pressure water mist nozzle of this application adopts the above structure, through multiple mixed flows and two atomizations, the atomization effect of the high-pressure water mist nozzle is improved, and multiple nozzle bodies 3 are distributed in a ring, which increases the size of the high-pressure water mist nozzle The atomization angle is wider, which can realize rapid fire extinguishing and improve the fire extinguishing efficiency. The high-pressure water mist nozzle has compact structure, reliable performance, good atomization effect and strong practicability.

The high-pressure water mist nozzle provided by this application has been introduced in detail above. In this article, specific examples have been used to illustrate the principle and implementation of this application. The description of the above examples is only used to help understand the method and core idea of this application. At the same time, for those skilled in the art, based on the idea of this application, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be construed as limiting the application.

Claims (12)

1. A high pressure fine mist spray head, comprising:

the nozzle comprises a nozzle body (1), wherein a fluid chamber (11) is arranged in the nozzle body, and the water inlet side of the fluid chamber (11) is used for being connected with an external pipeline;

swirl vanes (2) which are installed in the fluid chamber (11) and whose outer peripheral side is provided with a first spiral groove (21);

the nozzle body (3) is installed on the nozzle body (1) and is close to the water outlet side of the fluid chamber (11), the nozzle body (3) comprises a nozzle shell (31) and a swirl body (32), a swirl cavity (311) and a spray hole (312) which are sequentially communicated with the fluid chamber (11) are arranged in the nozzle shell (31), the swirl body (32) is arranged in the swirl cavity (311), a second spiral groove (321) is formed in the outer periphery of the swirl body, and fluid sequentially flows through the first spiral groove (21) and the second spiral groove (321) for centrifugal atomization.

2. The high pressure fine mist spray head according to claim 1, characterized in that a first helix angle β1 of the first helical groove (21) is smaller than or equal to a second helix angle β2 of the second helical groove (321).

3. The high pressure fine mist spray head according to claim 2, characterized in that the first helix angle β1 and the second helix angle β2 satisfy: β1= (0.5 to 1.0) ×β2.

4. The high-pressure fine mist spray head according to claim 1, characterized in that the direction of rotation of the first spiral groove (21) is the same as the direction of rotation of the second spiral groove (321), and the number of grooves Z1 of the first spiral groove (21) is larger than the number of grooves Z2 of the second spiral groove (321).

5. The high-pressure fine water mist head according to any one of claims 1 to 4, characterized in that the fluid chamber (11) comprises a cylindrical chamber (111) and a tapering chamber (112), an end of the cylindrical chamber (111) remote from the tapering chamber (112) being configured as the water inlet side, a large mouth end of the tapering chamber (112) being in communication with the cylindrical chamber (111), the swirl vane (2) being mounted in the cylindrical chamber (111) with its end face facing away from the water inlet side projecting into the tapering chamber (112) or being flush with a large mouth end of the tapering chamber (112).

6. The high-pressure fine water mist spray head according to claim 5, characterized in that a plurality of mounting holes (12) communicated with the tapered chamber (112) are provided on a wall surface of the tapered chamber (112), wherein the nozzle body (3) is mounted in the mounting holes (12).

7. The high-pressure fine water mist spray head according to claim 1, characterized in that the nozzle body (3) further comprises a runner body (33) installed in the swirl chamber (311), the runner body (33) is internally provided with a fluid runner (331) and is externally provided with external threads, the swirl chamber (311) is internally provided with internal threads matched with the external threads, and the runner body (33) is used for fixing the swirl body (32) in the nozzle housing (31).

8. The high-pressure fine mist nozzle head according to claim 7, characterized in that the swirl body (32) comprises a cone-shaped portion (322) and a cylindrical rod-shaped portion (323), the cylindrical rod-shaped portion (323) extends into the fluid flow passage (331) and defines a first flow passage (34) with an inner wall of the fluid flow passage (331), the flow passage body (33) has an abutment side (332) close to the cone-shaped portion (322), a junction of the cone-shaped portion (322) and the cylindrical rod-shaped portion (323) has a step surface (324), and the abutment side (332) abuts against the step surface (324).

9. The high-pressure fine water mist spray head according to claim 8, characterized in that the spray hole (312) comprises a conical hole section (3121) communicated with the swirling chamber (311), the conical hole section (3121) has a tapering trend in a direction away from the swirling chamber (311), the conical portion (322) is adapted to the conical hole section (3121), and a side of the conical portion (322) close to the cylindrical rod-shaped portion (323) does not extend into the conical hole section (3121).

10. The high-pressure fine water mist spray head according to claim 7, characterized in that an abutting side (332) of the flow channel body (33) is hollow cylindrical, and an outer diameter thereof is smaller than an inner diameter of the swirl chamber (311), a communication groove (333) is formed in the abutting side (332) of the flow channel body (33), and the communication groove (333) communicates the swirl chamber (311) with the fluid flow channel (331).

11. The high pressure fine mist spray head of claim 5, further comprising:

the filtering piece (4) is arranged in the cylindrical cavity (111) and is close to the water inlet side compared with the cyclone blade (2), wherein the water inlet side of the cylindrical cavity (111) is provided with internal connecting threads, and the internal connecting threads are used for being in threaded connection with the external pipeline.

12. The high-pressure fine water mist spray head according to claim 11, wherein a retaining ring groove and a positioning groove are formed in the inner peripheral side of the cylindrical chamber (111), the diameter of the retaining ring groove is larger than that of the positioning groove, the retaining ring groove is located on one side, opposite to the swirl blades (2), of the positioning groove, the filter element (4) is disc-shaped, the high-pressure fine water mist spray head further comprises an elastic retaining ring (5), and the elastic retaining ring (5) is in interference fit with the retaining ring groove so as to limit the filter element (4) in the positioning groove along the axial direction of the cylindrical chamber (111).

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