Curved surface type fire-fighting water mist nozzle

Abstract

The invention provides a curved surface type fire-fighting water mist nozzle which comprises a pipe wall part, a fastening part and a curved surface nozzle body which are sequentially arranged. A water guide pipeline is arranged at the core parts of the pipe wall part and the fastening part; the water guide pipeline is communicated with the curved-surface spray head through a connecting channel; a centrifugal assembly is arranged in the water guide pipeline; the centrifugal assembly is composed of two water guide plates, the edges of the two water guide plates are connected through a supporting piece, a set included angle is formed between the planes of the two water guide plates, water guide holes are formed in the positions, close to the edges of the supporting piece, of the water guide plates, and water flow is changed into the spiral flow direction. The problems that the particle size of fog drops of a nozzle is large and uneven, kinetic energy of water flow is dissipated in the conveying process of the nozzle, the flow coefficient is small, consequently, the coverage range is limited, and water mist distribution uniformity is poor are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of fire sprinklers, and in particular relates to a curved fire water mist sprinkler. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] In fire protection systems, water mist nozzles are key equipment for suppressing initial fires and controlling the spread of fire. They are particularly suitable for fire protection in densely populated areas such as cable trays and electrical equipment. As the core component of automatic sprinkler fire extinguishing systems, fire mist nozzles have a direct impact on fire extinguishing efficiency due to their atomization performance, coverage range, and anti-clogging capabilities. Traditional fire sprinklers mostly use impact or centrifugal atomization principles. Traditional sprinklers rely on mechanical impact or simple centrifugal structures to break up water flow. The droplet size distribution is wide, with a high proportion of large droplets. The atomization uniformity is insufficient, which can easily lead to fire extinguishing blind spots or water damage. Pressurized water flows through a single-stage diversion and is directly sprayed. The rotational kinetic energy is easily dissipated during transportation, resulting in low kinetic energy conversion efficiency. Higher water supply pressure is required to achieve the ideal atomization effect, resulting in significant energy consumption. In fire protection pipelines with small flow coefficients, fixed curvature diversion surfaces are difficult to adapt to the complex space of densely populated cable tray areas in nuclear facilities, resulting in limited coverage, poor water mist distribution uniformity, and coverage blind spots. Summary of the Invention

[0004] In response to the above problems, the present invention provides a curved fire water mist nozzle, which solves the problems of large and uneven droplet size of the nozzle, dissipation of kinetic energy of water flow during nozzle transportation, small flow coefficient resulting in limited coverage range, and poor uniformity of water mist distribution.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions: In a first aspect, the present invention provides a curved fire water mist nozzle, comprising: a pipe wall portion, a fastening portion, and a curved nozzle, wherein the pipe wall portion, the fastening portion, and the curved nozzle are arranged in sequence; a water conduit is provided at the core of the pipe wall portion and the fastening portion, the water conduit being connected to the curved nozzle via a connecting channel; and a centrifugal assembly is provided in the water conduit; The centrifugal assembly consists of two water guide plates, the edges of which are connected by a support member, and the planes of the two water guide plates form a set angle with each other. Water guide holes are provided on the edges of the water guide plates near the support member to convert the water flow into a spiral flow direction.

[0006] As a further implementation, the water guide plate is made of a semicircular plate, the support member is made of a triangular plate, and the two side edges of the support member are fixedly connected to the two water guide plates respectively.

[0007] As a further implementation manner, the angle between the two water guide plates is equal to the top angle of the support member.

[0008] As a further implementation, the water guide hole is a tapered hole, and the tapered hole is a conical hole or a pyramidal hole; the large opening of the water guide hole is the water inlet, and the small opening of the water guide hole is the water outlet.

[0009] As a further implementation, the distance between the water guide ports on the two water guide plates is greater than the inner diameter of the connecting channel, so that the liquid continues to rotate in the water guide pipe and is discharged through the connecting channel.

[0010] As a further implementation method, the curved surface nozzle is a cylindrical structure, and a spraying chamber is provided on the side of the cylinder. The connecting channel is connected to the spraying chamber through a conical channel. The top of the spraying chamber is a plane, the side of the spraying chamber is an inclined horizontal plane, and the bottom of the spraying chamber is a variable curvature surface; the variable curvature surface and the inclined horizontal plane are smoothly connected.

[0011] As a further implementation, the variable curvature surface is an elliptical surface, an Archimedean spiral surface or a higher order surface.

[0012] As a further implementation method, the angle between the inclined horizontal plane and the central axis of the curved fire water mist nozzle ranges from 5 to 20 degrees.

[0013] As a further implementation method, the tube wall portion is a circular tube structure, and an external thread is provided on the outer wall of the circular tube and is connected to the fire protection pipeline; the outer wall of the fastening portion is a square or regular hexagonal structure.

[0014] As a further implementation method, the pipe wall portion, the fastening portion and the curved nozzle are integrally formed by casting.

[0015] Compared with the prior art, the present invention has the following advantages and positive effects: The centrifugal assembly of the present invention adopts a double water guide plate angle design, which cooperates with the water guide hole to convert the water flow into spiral motion, significantly improving the liquid crushing efficiency, making the water mist particle size smaller and the distribution more uniform; the coordinated structure of the water guide plate and the support member forms a vortex enhancement effect, so that the spiral water flow maintains a stable flow state during pressure fluctuations, ensuring the accuracy of the spray angle, and the linkage design of the curved nozzle and the centrifugal assembly realizes three-level optimization of the water guide pipe-connecting channel-nozzle surface, so that the atomized particle group has a directional aggregation characteristic, which increases the concentration of the fire extinguishing medium in vertically dense spaces such as cable trays and significantly shortens the fire control time.

[0016] The present invention forms a stable geometric support system by fixedly connecting a semicircular water guide plate to the side of a triangular support member, effectively enhancing the rigidity of the overall structure and preventing deformation caused by water flow impact. The consistent design of the top angle of the support member and the angle of the water guide plate makes the angle of the diversion channel between the two water guide plates uniform, reduces the generation of turbulence, and significantly improves the efficiency of water flow guidance. The water guide hole is set as a conical structure, so that the water flow naturally accelerates when flowing from the large water inlet to the small water outlet, forming a stable directional water flow and improving the water diversion efficiency; the tapered channel converts the static pressure of the fluid into dynamic pressure, and uses the Bernoulli effect to enhance the water outlet speed, which is suitable for occasions requiring high-pressure injection while reducing external power dependence. By setting the constraint condition that the distance between the water guide ports is greater than the inner diameter of the connecting channel, the liquid forms a continuous spiral flow in the water guide pipe, and then enters the curved nozzle after a certain period of time, so that the flow direction of the water entering the curved nozzle is in a spiral state. This design extends the fluid rotation path and, through the random mixing of eddies, ensures that the sprayed water flow is not concentrated in a certain area but is evenly distributed, making the droplet size more uniform.

[0017] The present invention smoothly connects the variable curvature surface with the inclined horizontal surface. Due to the presence of the inclined horizontal surface and the variable curvature curved water guide surface, the water flow will experience different curvature changes during the spraying process. When the water flow passes through the water guide surface, the velocity distribution changes, causing a gradient in the local shear force. This uneven distribution of shear force creates a strong disturbance within the water flow, promoting the breakup of the water flow and improving the refinement of the droplets. The fluid dynamics effect caused by the curvature change causes the water flow to form a complex vortex structure on the water guide surface. Due to the randomness and mixing of the vortex, the sprayed water flow will not be concentrated in a certain area, but will be evenly distributed, thereby making the droplet size more uniform and avoiding the generation of large droplets. This is particularly important for application scenarios that require high-precision spraying, such as fire fighting in areas with dense cable trays in factories. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1 This is a front view of the curved fire water mist nozzle of the present invention; Figure 2 This is a side view of the curved fire water mist nozzle of the present invention; Figure 3 This is a cross-sectional view of the curved fire water mist nozzle of the present invention; Figure 4 This is a structural diagram of the centrifugal assembly of the present invention.

[0020] In the figure: 1. pipe wall; 11. water guide pipe; 12. connecting channel; 13. tapered channel; 2. fastening part; 3. curved nozzle; 31. inclined horizontal surface; 32. variable curvature surface; 4. centrifugal assembly; 41. water guide plate; 42. support member. DETAILED DESCRIPTION

[0021] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise clearly indicated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprising" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations; Example 1 This embodiment provides a curved fire water mist nozzle, such as Figure 1-Figure 3 As shown, it comprises: a pipe wall portion 1, a fastening portion 2 and a curved surface nozzle 3, wherein the pipe wall portion 1, the fastening portion 2 and the curved surface nozzle 3 are arranged in sequence; a water conduit 11 is provided at the core of the pipe wall portion 1 and the fastening portion 2, and the water conduit 11 is connected to the curved surface nozzle 3 via a connecting channel 12; a centrifugal assembly 4 is provided in the water conduit 11; The centrifugal assembly 4 is composed of two water guide plates 41, the edges of which are connected by a support 42, and the planes of the two water guide plates 41 form a set angle with each other, and the water guide holes are provided at the edges of the water guide plates 41 near the support 42 to convert the water flow into a spiral flow direction. Specifically, the centrifugal assembly 4 adopts a double water guide plate 41 angle design, which cooperates with the water guide holes to convert the water flow into a spiral motion, significantly improving the liquid fragmentation efficiency, making the water mist particle size smaller and more evenly distributed; the coordinated structure of the water guide plate 41 and the support 42 forms a vortex enhancement effect, so that the spiral water flow maintains a stable flow state even when the pressure fluctuates, ensuring the accuracy of the injection angle. The linkage design of the curved nozzle 3 and the centrifugal assembly 4 realizes a three-level optimization of the water guide pipe 11-connecting channel 12-nozzle curve, so that the atomized particle group has a directional aggregation characteristic, which increases the concentration of the fire extinguishing medium in vertically dense spaces such as cable trays and significantly shortens the fire control time.

[0023] As a further implementation, Figure 4As shown, the water guide plate 41 is made of a semicircular plate, and the support member 42 is made of a triangular plate. The two side edges of the support member 42 are fixedly connected to the two water guide plates 41 respectively. The angle between the two water guide plates 41 is equal to the angle of the top angle of the support member 42. By fixedly connecting the semicircular water guide plate 41 with the side edges of the triangular support member 42, a stable geometric support system is formed, which effectively enhances the rigidity of the overall structure and prevents deformation caused by water flow impact. The consistent design of the top angle of the support member 42 and the angle of the water guide plate 41 makes the angle of the diversion channel between the two water guide plates 41 uniform, reduces the generation of turbulence, and significantly improves the efficiency of water flow guidance.

[0024] As a further implementation method, the water guide hole is a tapered hole, which is a conical hole or a pyramidal hole; the large mouth of the water guide hole is the water inlet, and the small mouth of the water guide hole is the water outlet. The tapered structure is designed with a tapered cross-section, so that the water flow is naturally accelerated when flowing from the large water inlet to the small water outlet, forming a stable directional water flow and improving the water guide efficiency; the tapered channel converts the static pressure of the fluid into dynamic pressure, and uses the Bernoulli effect to enhance the water outlet speed, which is suitable for occasions requiring high-pressure injection while reducing dependence on external power.

[0025] As a further implementation, the distance between the water outlets on the two water guide plates 41 is greater than the inner diameter of the connecting channel 12, allowing the liquid to continuously rotate within the water guide pipe 11 and be discharged through the connecting channel 12. Specifically, by setting the constraint that the distance between the water outlets is greater than the inner diameter of the connecting channel 12, the liquid forms a continuous spiral flow within the water guide pipe 11, which continues for a certain period of time before entering the curved surface nozzle 3, resulting in a spiral flow direction for the water entering the curved surface nozzle 3. This design extends the fluid rotation path and, through the random mixing of vortices, ensures that the ejected water flow is not concentrated in a single area but is evenly distributed, thereby making the droplet size more uniform.

[0026] As a further implementation method, the curved nozzle 3 is a cylindrical structure, and a spraying chamber is provided on the side of the cylinder. The connecting channel 12 is connected to the spraying chamber through a conical channel 13. The top of the spraying chamber is a plane, the side of the spraying chamber is an inclined oblique guide horizontal surface 31, and the bottom of the spraying chamber is a variable curvature surface 32; the variable curvature surface 32 is smoothly connected to the oblique guide horizontal surface 31. Due to the existence of the oblique guide horizontal surface 31 and the variable curvature curved water guide surface, the water flow will experience different curvature changes during the spraying process; when the water flow passes through the water guide surface, the velocity distribution changes, so that the local shear force produces a gradient; this uneven distribution of shear force causes strong disturbances to form inside the water flow, promotes the breakup of the water flow, and improves the degree of droplet refinement.

[0027] As a further implementation method, the variable curvature surface 32 is an elliptical surface, an Archimedean spiral surface or a higher-order surface. The fluid dynamic effect caused by the curvature change causes the water flow to form a complex vortex structure on the water guide surface. Due to the randomness and mixing effect of the vortex, the sprayed water flow will not be concentrated in a certain area, but will be evenly distributed, thereby making the particle size of the droplets more uniform and avoiding the generation of large-particle droplets; this is especially important for application scenarios that require high-precision spraying, such as fire extinguishing in areas with dense cable trays in factories.

[0028] As a further implementation method, the angle between the inclined horizontal plane 31 and the central axis of the curved fire water mist nozzle ranges from 5 to 20 degrees. When the water flows through the inclined horizontal plane 31, the local shear force produces a gradient, increasing the turbulence intensity, and the variable curvature surface 32 causes the water flow to be further broken up to form smaller droplets.

[0029] As a further implementation method, the tube wall portion 1 is a circular tubular structure, and an external thread is provided on the outer wall of the circular tube, which can be directly screwed with the internal thread interface or quick connector of the standard fire protection pipe to achieve a quick sealed connection; the outer wall of the fastening portion 2 is a square or regular hexagonal structure, which can be matched with general tools such as wrenches or sockets to facilitate the application of torque.

[0030] As a further implementation method, the pipe wall portion 1, the fastening portion 2 and the curved nozzle 3 are integrally formed by casting.

[0031] Working principle of curved fire water mist sprinkler: After the pressurized water flow enters the water guide pipe 11 of the pipe wall 1, it impacts the centrifugal assembly 4, which is composed of two inclined water guide plates 41. The water guide plates 41 are arranged at a V-shaped angle (the angle is the same as the top angle of the support member 42), forcing the water flow to deflect along the surface of the water guide plates 41. When the water flow passes through the tapered water guide holes (large inlet, small outlet) on the edge of the water guide plates 41, it is accelerated due to the contraction of the cross-sectional area, and a tangential velocity component is generated due to the oblique jet. The water guide holes of the two water guide plates 41 spray symmetrically, causing the water flow to form a high-speed spiral flow pattern within the pipe. The design of the water guide holes spacing larger than the inner diameter of the connecting channel 12 ensures that the spiral flow maintains sufficient rotation before entering the connecting channel 12, avoiding premature dissipation of kinetic energy.

[0032] The spiraling water flow passes through connecting channel 12 and enters the nozzle's tapered channel 13. Due to the reduction in cross-sectional area, it accelerates further while maintaining its rotational inertia. The water flow impacts the variable curvature surface 32 (such as an elliptical surface or Archimedean spiral) of the spray chamber. The normal force acting on the surface decomposes the flow into radial diffusion and tangential rotation. The radial diffusion, caused by the variable curvature surface 32, diverges the water flow along varying radii, forming a thin film of water. The tangential rotation, caused by the inclined horizontal surface 31 (inclination angle 5°-20°), guides the water film into a rotating, ejected state, utilizing centrifugal force to break it into fine droplets. The top plane and the inclined horizontal surface 31 work together to constrain the spray angle, while the bottom variable curvature surface 32 ensures wide coverage and even distribution of the mist.

[0033] The centrifugal assembly 4 converts pressure energy into rotational kinetic energy, while the curved nozzle 3 provides secondary control, resulting in low energy consumption and uniform droplet size. The variable curvature surface 32 adapts to different spraying scenarios, while the angle of the inclined horizontal surface 31 is adjustable (5° to 20°) to balance range and coverage density. The tapered water guide hole design reduces impurity retention, while the large channel inner diameter reduces the risk of clogging. This curved fire mist nozzle is suitable for centralized firefighting in areas with dense cable trays within factory buildings, combining optimized fluid dynamics with structural reliability.

[0034] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. A curved fire water mist nozzle, characterized in that: include: A pipe wall portion, a fastening portion, and a curved surface spray head are arranged in sequence; a water conduit is provided at the core of the pipe wall portion and the fastening portion, and the water conduit is connected to the curved surface spray head through a connecting channel; a centrifugal component is provided in the water conduit; The centrifugal assembly consists of two water guide plates, the edges of which are connected by a support member, and the planes of the two water guide plates form a set angle with each other. Water guide holes are provided on the edges of the water guide plates near the support member to convert the water flow into a spiral flow direction.

2. A curved fire water mist nozzle according to claim 1, characterized in that: The water guide plate is made of a semicircular plate, the support member is made of a triangular plate, and the two side edges of the support member are fixedly connected to the two water guide plates respectively.

3. A curved fire water mist nozzle according to claim 2, characterized in that: The included angle between the two water guide plates is equal to the top angle of the support member.

4. A curved fire water mist nozzle according to claim 1, characterized in that: The water guide hole is a tapered hole, which is a conical hole or a pyramidal hole; the large opening of the water guide hole is a water inlet, and the small opening of the water guide hole is a water outlet.

5. A curved fire water mist nozzle as claimed in claim 4, characterized in that: The distance between the water guide ports on the two water guide plates is greater than the inner diameter of the connecting channel, so that the liquid continues to rotate in the water guide pipe and is discharged through the connecting channel.

6. A curved fire water mist nozzle according to claim 5, characterized in that: The curved surface nozzle is a cylindrical structure, and a spraying chamber is provided on the side of the cylinder. The connecting channel is connected to the spraying chamber through a conical channel. The top of the spraying chamber is a plane, the side of the spraying chamber is an inclined horizontal plane, and the bottom of the spraying chamber is a variable curvature surface; the variable curvature surface and the inclined horizontal plane are smoothly connected.

7. A curved fire water mist nozzle according to claim 6, characterized in that: The variable curvature surface is an elliptical surface, an Archimedean spiral surface or a high-order surface.

8. The curved fire water mist nozzle according to claim 1, characterized in that: The angle between the inclined horizontal plane and the central axis of the curved fire water mist nozzle is in the range of 5-20°.

9. The curved fire water mist nozzle according to claim 1, characterized in that: The tube wall portion is a circular tube structure, and an external thread is provided on the outer side wall of the circular tube and is connected to the fire protection pipeline; the outer side wall of the fastening portion is a square or regular hexagonal structure.

10. The curved fire water mist nozzle according to claim 1, characterized in that: The pipe wall portion, the fastening portion and the curved surface nozzle are integrally formed by casting.

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