High-pressure water mist nozzle

Abstract

The utility model discloses a high-pressure water mist spray head which comprises a hollow spray head shell and a nozzle, and a filter screen assembly is detachably connected in the spray head shell. The filter screen assembly is composed of a coarse filter screen and a fine filter screen which are sequentially arranged in the water flow direction and fixedly connected, the fine filter screen is located in the coarse filter screen, the coarse filter screen comprises a top filter screen and a side ring filter screen, and a first ring groove is formed between the side ring filter screen and the inner wall of the spray head shell. During working, primary filtration is performed by the coarse filter screen, impurities are accumulated in the first ring groove, secondary fine filtration is performed by the fine filter screen, and the blocking risk is reduced. The spray head solves the problems that a filter screen of a traditional spray head is easy to block and high in maintenance cost through a graded filtering and impurity collecting structure, ensures the stable spraying effect, is simple in structure, easy to disassemble and convenient to maintain, and effectively improves the applicability and reliability of the spray head in different water quality environments.

Description

Technical Field

[0001] This utility model relates to the field of nozzle technology, and in particular to a high-pressure fine water mist nozzle. Background Technology

[0002] High-pressure fine water mist nozzles are widely used in firefighting, industrial cooling, and other fields as highly efficient fire extinguishing and cooling devices. They atomize high-pressure water into tiny droplets and spray them out, utilizing the cooling and suffocating effects of the fine water mist to extinguish fires and suppress dust. Existing high-pressure fine water mist nozzles typically incorporate a filter structure to filter impurities in the water, preventing clogging of the nozzle outlet and ensuring the uniformity and stability of the spray.

[0003] However, existing filter structures have many shortcomings. Due to their limited filtration accuracy and impurity holding capacity, they are unable to effectively block impurities of different particle sizes, leading to easy clogging. Once the filter is clogged, it not only reduces the spray effect of the nozzle, affecting fire extinguishing or cooling efficiency, but also increases the system's maintenance costs and frequency. In addition, existing nozzles also have deficiencies in impurity collection; impurities cannot be collected smoothly and tend to accumulate at the filter, further exacerbating the clogging problem and limiting the application range and operational stability of high-pressure fine water mist nozzles. Utility Model Content

[0004] The main purpose of this utility model is to provide a high-pressure fine water mist nozzle, which aims to effectively solve the problems of easy clogging of existing nozzle filters and difficulty in collecting impurities by setting up a detachable graded filter screen assembly and impurity collection structure, thereby reducing the maintenance frequency and cost of the nozzle, improving its applicability in different water quality environments, ensuring stable spraying effect of the nozzle, thereby improving fire extinguishing or cooling efficiency, and enhancing the convenience and practicality of the device.

[0005] To achieve the above objectives, this utility model proposes a high-pressure fine water mist nozzle, including a nozzle housing and a nozzle. The nozzle housing has a hollow structure, and a filter assembly is detachably connected inside the nozzle housing. The filter assembly includes a coarse filter and a fine filter arranged sequentially along the water flow direction. The coarse filter and the fine filter are fixedly connected, and the fine filter is located inside the coarse filter. The coarse filter includes a top filter and a side ring filter. A first annular groove is provided between the side ring filter and the inner wall of the nozzle housing. The first annular groove is used to accumulate filtered impurities to prevent clogging of the filter.

[0006] In one possible implementation, a second annular groove is provided between the fine filter and the side ring filter, the second annular groove being used to accumulate impurities filtered by the fine filter to prevent clogging of the fine filter.

[0007] In one possible implementation, the top of both the top filter and the top of the fine filter are trapezoidal in cross-section, with the slope of the top filter facing the first annular groove and the slope of the fine filter facing the second annular groove.

[0008] In one possible implementation, both the coarse and fine filter screens are made of stainless steel, with the coarse filter screen having a mesh size of 40-60 and the fine filter screen having a mesh size of 100-200.

[0009] In one possible implementation, a first limiting ring is fixedly connected to the bottom of the filter assembly, the outer diameter of the first limiting ring being the same as the inner diameter of the nozzle housing, and a second limiting ring is fixedly connected to the inner wall of the nozzle housing, with the first limiting ring abutting against the second limiting ring.

[0010] In one possible implementation, the first limiting ring has a hollow fixing post on the side opposite to the coarse filter screen, the outer wall of the hollow fixing post has a fixing protrusion, and the inner wall of the second limiting ring has a fixing groove, the fixing protrusion being embedded in the fixing groove.

[0011] The working principle and beneficial effects of this utility model are as follows:

[0012] In operation, this invention first passes high-pressure water through a coarse filter. The top and side ring filters of the coarse filter initially intercept larger particles of impurities, which are then trapped in the first annular groove between the side ring filter and the inner wall of the nozzle housing, reducing the amount of impurities entering the fine filter. The water then undergoes secondary fine filtration through the fine filter. Since the coarse filter has already intercepted most of the impurities, the risk of clogging in the fine filter is significantly reduced. This structure, through the staged filtration of the coarse and fine filters and the impurity storage function of the first annular groove, effectively solves the problems of easy filter clogging and difficult impurity collection in existing technologies. This invention significantly improves the nozzle's adaptability to different water qualities, reduces the frequency of filter clogging, extends the nozzle's maintenance cycle, and reduces maintenance costs; it ensures a stable spray effect, improving fire extinguishing or cooling efficiency; and its simple structure and detachable filter assembly facilitate cleaning and replacement, enhancing the convenience and practicality of the nozzle. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a front view of the present invention;

[0016] Figure 3 for Figure 2 Sectional view at point AA;

[0017] Figure 4 This is a top view of the present invention.

[0018] Explanation of reference numerals: 1. Nozzle housing; 2. Nozzle; 3. Filter assembly; 11. First annular groove; 12. Second limiting ring; 13. Fixing groove; 31. Coarse filter; 32. Fine filter; 33. Second annular groove; 34. First limiting ring; 35. Hollow fixing post; 36. Fixing protrusion; 311. Top filter; 312. Side annular filter.

[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0021] like Figures 1-4 As shown, this embodiment proposes a high-pressure fine water mist nozzle, including a nozzle housing 1 and a nozzle 2. The nozzle housing 1 has a hollow structure, and a filter assembly 3 is detachably connected inside the nozzle housing 1. The filter assembly 3 includes a coarse filter 31 and a fine filter 32 arranged sequentially along the water flow direction. The coarse filter 31 and the fine filter 32 are fixedly connected, and the fine filter 32 is located inside the coarse filter 31. The coarse filter 31 includes a top filter 311 and a side ring filter 312. A first annular groove 11 is provided between the side ring filter 312 and the inner wall of the nozzle housing 1. The first annular groove 11 is used to accumulate filtered impurities to prevent clogging of the filter.

[0022] The nozzle housing 1 is a hollow structure that houses internal components (filter assembly 3, nozzle 2, etc.) and guides the water flow, forming the basic framework of the entire nozzle. Its material should possess sufficient strength and corrosion resistance to protect the internal structure from external environmental damage, while providing a stable channel for the water flow, ensuring it smoothly reaches the nozzle 2 to form a fine water mist. The nozzle 2 is a key component of the high-pressure fine water mist nozzle; its function is to convert the high-pressure water flow filtered by the filter into a fine water mist. Through a special internal structural design, it accelerates and segments the water flow, causing it to be sprayed out in the form of tiny droplets, achieving functions such as fire extinguishing, cooling, and dust suppression. Different types of nozzle 2 designs can produce fine water mist with different particle sizes, spray angles, and coverage areas to adapt to different application scenarios. The coarse filter 31 consists of a top filter 311 and a side ring filter 312. Its function is to perform preliminary filtration of the water flow entering the nozzle, intercepting larger particles such as sand and rust. The coarse filter 31, acting as the first filtration barrier, significantly reduces the amount of impurities entering the fine filter 32, lowers the filtration load on the fine filter 32, extends its service life, and also reduces the overall risk of nozzle clogging. The top filter 311 and side ring filter 312 increase the filtration efficiency of the coarse filter 31, allowing high-pressure water to pass through both the top filter 311 and the side ring filter 312 within the first annular groove 11. The fine filter 32, located inside the coarse filter 31, performs secondary fine filtration on the water flow after the initial filtration by the coarse filter 31, further removing smaller particles of impurities. This ensures the cleanliness of the water entering the nozzle 2, prevents tiny impurities from clogging the nozzle 2, and guarantees the uniformity and stability of the fine water mist, thereby improving the nozzle's performance and fire extinguishing effects. The filter assembly 3 is detachably connected to the nozzle housing 1, facilitating regular cleaning, maintenance, and replacement of the filter. After a period of use, the impurities trapped in the filter screen will gradually accumulate and affect the filtration effect. At this time, the detachable design allows operators to quickly remove the filter screen assembly 3 for cleaning or replacement, reducing maintenance difficulty, improving maintenance efficiency, and also helping to extend the overall service life of the nozzle. The first annular groove 11 is designed so that when water flows through the coarse filter screen 31, the impurities trapped will enter the first annular groove 11 under the impact of water flow and gravity and be stored there. This prevents impurities from accumulating on the surface of the coarse filter screen 31, preventing clogging of the coarse filter screen 31 due to impurity accumulation, ensuring that the coarse filter screen 31 can continuously and effectively perform its preliminary filtration function, and ensuring the normal operation and stable functioning of the nozzle.

[0023] In this embodiment, a second annular groove 33 is provided between the fine filter screen 32 and the side ring filter screen 312. The second annular groove 33 is used to accumulate impurities filtered by the fine filter screen 32 to prevent clogging of the fine filter screen 32.

[0024] The second annular groove 33 is located between the fine filter screen 32 and the side annular filter screen 312, and its main function is to collect impurities filtered out by the fine filter screen 32. When water flows through the fine filter screen 32, some smaller impurities are intercepted by the fine filter screen 32. These impurities will enter the second annular groove 33 under the action of the water flow and accumulate there. By collecting the impurities filtered by the fine filter screen 32 through the second annular groove 33, it is possible to effectively prevent the fine filter screen 32 from becoming clogged due to excessive impurities, extend the service life of the fine filter screen 32, and thus ensure the stable spray effect of the nozzle. This helps to maintain the normal working condition of the nozzle, reduce problems such as uneven spray and abnormal nozzle pressure caused by the clogging of the fine filter screen 32, improve the reliability and stability of the high-pressure fine water mist nozzle in practical applications, reduce maintenance costs and frequency, and enable it to better perform its functions such as fire extinguishing and cooling under different water quality conditions.

[0025] In this embodiment, the top cross-sections of both the top filter 311 and the fine filter 32 are trapezoidal, with the slope of the top filter 311 facing the first annular groove 11 and the slope of the fine filter 32 facing the second annular groove 33.

[0026] The slope of the top filter screen 311 faces the first annular groove 11. When water flows through the top filter screen 311, this trapezoidal structure helps guide the intercepted impurities along the slope towards the first annular groove 11. Under the scouring effect of the water flow and the component of gravity along the slope, impurities are more easily accumulated in the first annular groove 11, reducing the retention and accumulation of impurities on the surface of the top filter screen 311. The trapezoidal design of the top filter screen 311 makes impurity collection more efficient, further reducing the possibility of the coarse filter screen 31 being clogged, ensuring the filtration effect and water flow of the coarse filter screen 31, thereby improving the working stability and reliability of the entire nozzle and reducing the maintenance work required due to the clogging of the coarse filter screen 31. The slope of the top of the fine filter screen 32 faces the second annular groove 33, which can guide the impurities intercepted by the fine filter screen 32 into the second annular groove 33 along the slope. Because the impurities intercepted by the fine filter screen 32 are relatively small in size, they are more likely to adhere to the filter screen. The trapezoidal structure can utilize water flow and gravity to guide these impurities to the second annular groove 33 in a timely manner, preventing impurities from accumulating on the top of the fine filter screen 32. The trapezoidal structure design at the top of the fine filter screen 32 effectively prevents the fine filter screen 32 from becoming clogged due to impurity accumulation, ensuring the fine filtration function of the fine filter screen 32, making the water flow entering the nozzle 2 purer, thereby ensuring that the nozzle can produce a uniform and stable fine water mist, improving the fire extinguishing and cooling effects, while also extending the service life of the fine filter screen 32 and reducing maintenance costs.

[0027] In this embodiment, both the coarse filter 31 and the fine filter 32 are made of stainless steel. The coarse filter 31 has a mesh size of 40-60 mesh, and the fine filter 32 has a mesh size of 100-200 mesh.

[0028] Stainless steel possesses excellent corrosion resistance, high strength, and oxidation resistance. In high-pressure fine water mist nozzles, using stainless steel for the coarse filter screen 31 and fine filter screen 32 resists the erosion of corrosive substances in the water, extending the filter screen's service life and ensuring it won't be damaged by rust or corrosion during long-term use. This maintains stable filtration performance and ensures the nozzle's normal operation. Simultaneously, the high strength of stainless steel can withstand the impact of high-pressure water flow and is not easily deformed, ensuring the stability of the filter screen structure. The coarse filter screen 31 has a mesh size of 40-60, its function being to perform preliminary filtration of the water flow, intercepting larger particles of impurities such as sand, gravel, and rust. This mesh size range effectively removes large particles of impurities from the water, reducing the filtration burden on the fine filter screen 32, preventing large particles from entering and clogging it, and improving the efficiency and reliability of the entire filtration system. Within this range, a mesh size of 50 is preferred. The 50-mesh coarse filter 31 achieves a good balance between intercepting large particles and ensuring smooth water flow. It effectively filters out most large particles while maintaining unobstructed water flow, preventing excessive flow resistance due to overly dense mesh. The fine filter 32, with a mesh size of 100-200, primarily filters the water after the coarse filter 31, removing tiny particles to ensure the purity of the water entering the nozzle 2. This prevents small impurities from clogging the nozzle 2 and ensures the uniformity and stability of the fine water mist. This mesh size range meets the water quality requirements of different applications and adapts to a wider range of water source conditions. Within this range, a mesh size of 150 is preferred. The 150-mesh fine filter 32 ensures filtration effectiveness while minimizing pressure loss during water flow, effectively balancing filtration precision and water flow performance. This results in a more uniform fine water mist particle size, better spray effect, and greater efficiency for functions such as fire extinguishing and cooling.

[0029] In this embodiment, a first limiting ring 34 is fixedly connected to the bottom of the filter assembly 3. The outer diameter of the first limiting ring 34 is the same as the inner diameter of the nozzle housing 1. A second limiting ring 12 is fixedly connected to the inner wall of the nozzle housing 1. The first limiting ring 34 abuts against the second limiting ring 12.

[0030] The first limiting ring 34 is fixed to the bottom of the filter assembly 3, and its outer diameter is the same as the inner diameter of the nozzle housing 1. This allows the filter assembly 3 to be accurately installed inside the nozzle housing 1, ensuring the coaxiality of the filter assembly 3 and the nozzle housing 1. This ensures that the water flow can pass through the filter assembly 3 evenly and avoids water flow deviation caused by misalignment of the filter assembly 3, which would affect the filtration effect and spray quality. The first limiting ring 34 provides support for the filter assembly 3, bearing the weight of the filter assembly 3 and the pressure generated by the water flow on the filter during filtration. This prevents the filter assembly 3 from moving downwards or shaking under the impact of the water flow, ensuring the stability of the filter assembly 3 within the nozzle housing 1. The first limiting ring 34 improves the accuracy and stability of the filter assembly 3 installation, thereby ensuring the stability and consistency of the filtration effect. This helps extend the service life of the filter assembly 3, reduces filter wear or damage caused by unstable installation, and also helps improve the overall working performance and reliability of the nozzle, ensuring that the fine water mist nozzle can stably produce a uniform fine water mist. The second limiting ring 12, fixed to the inner wall of the nozzle housing 1, abuts against the first limiting ring 34, restricting the axial position of the filter assembly 3 within the nozzle housing 1. This prevents the filter assembly 3 from being excessively inserted into the nozzle housing 1, ensuring that the filter assembly 3 is properly installed and does not affect its fit with other nozzle components due to excessive installation. The second limiting ring 12 and the first limiting ring 34 cooperate to form a sealing structure at their contact point, reducing the possibility of water leakage from the gap between the filter assembly 3 and the inner wall of the nozzle housing 1, improving the nozzle's sealing performance, ensuring that all water flows are filtered by the filter assembly 3, and improving filtration efficiency. By accurately limiting and sealing the filter assembly 3, the second limiting ring 12 improves the overall performance and reliability of the nozzle. It prevents water leakage, avoiding problems such as uneven spray or insufficient pressure caused by leakage, and also helps protect the internal structure of the nozzle, reducing erosion and damage to other components due to water leakage.

[0031] In this embodiment, a hollow fixing post 35 is provided on the side of the first limiting ring 34 away from the coarse filter screen 31, and a fixing protrusion 36 is provided on the outer wall of the hollow fixing post 35. A fixing groove 13 is provided on the inner wall of the second limiting ring 12, and the fixing protrusion 36 is embedded in the fixing groove 13.

[0032] A hollow fixing post 35 is located on the side of the first limiting ring 34 opposite to the coarse filter screen 31. As a connecting component, it provides a basic structure for further fixing the filter assembly 3 and the nozzle housing 1. Its hollow design reduces the weight of the entire filter assembly 3 while allowing water flow through, minimizing obstruction and ensuring smooth water flow within the nozzle. A fixing protrusion 36 is located on the outer wall of the hollow fixing post 35. It cooperates with the fixing groove 13 on the inner wall of the second limiting ring 12, firmly fixing the filter assembly 3 within the nozzle housing 1. This protrusion-groove engagement effectively prevents axial movement of the filter assembly 3 during nozzle use, ensuring a stable relative position between the filter assembly 3 and the nozzle housing 1. When high-pressure water impacts the filter assembly 3, the fixing protrusion 36 can withstand a certain external force, transferring the force to the nozzle housing 1, enhancing the overall structural stability and reducing component loosening caused by vibration or water impact. The fixing protrusion 36 ensures a firm connection between the filter assembly 3 and the nozzle housing 1, reducing the risk of the filter assembly 3 falling off or shifting, thereby improving the reliability and service life of the nozzle. The fixing groove 13 is adapted to the fixing protrusion 36, providing space for the fixing protrusion 36 to be embedded. The tight fit between the two achieves a fixed connection between the filter assembly 3 and the nozzle housing 1. It is an important component of the fixing structure, working together with the fixing protrusion 36 to ensure the accurate position and stable connection of the filter assembly 3 inside the nozzle.

[0033] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0034] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A high-pressure fine water mist nozzle, comprising a nozzle housing (1) and a nozzle (2), wherein the nozzle housing (1) is a hollow structure, characterized in that, A filter assembly (3) is detachably connected inside the nozzle housing (1). The filter assembly (3) includes a coarse filter (31) and a fine filter (32) arranged sequentially along the water flow direction. The coarse filter (31) and the fine filter (32) are fixedly connected. The fine filter (32) is located inside the coarse filter (31). The coarse filter (31) includes a top filter (311) and a side ring filter (312). A first ring groove (11) is provided between the side ring filter (312) and the inner wall of the nozzle housing (1). The first ring groove (11) is used to accumulate filtered impurities to prevent clogging of the filter.

2. The high-pressure fine water mist nozzle according to claim 1, characterized in that, A second annular groove (33) is provided between the fine filter screen (32) and the side ring filter screen (312). The second annular groove (33) is used to accumulate impurities filtered by the fine filter screen (32) to prevent clogging of the fine filter screen (32).

3. A high-pressure fine water mist nozzle according to claim 1 or 2, characterized in that, The top cross-sections of both the top filter (311) and the fine filter (32) are trapezoidal. The slope of the top filter (311) faces the first annular groove (11), and the slope of the fine filter (32) faces the second annular groove (33).

4. A high-pressure fine water mist nozzle according to claim 1, characterized in that, Both the coarse filter (31) and the fine filter (32) are made of stainless steel. The coarse filter (31) has a mesh size of 40-60, and the fine filter (32) has a mesh size of 100-200.

5. A high-pressure fine water mist nozzle according to claim 1, characterized in that, The filter assembly (3) is fixedly connected to a first limiting ring (34) at its bottom. The outer diameter of the first limiting ring (34) is the same as the inner diameter of the nozzle housing (1). The inner wall of the nozzle housing (1) is fixedly connected to a second limiting ring (12). The first limiting ring (34) and the second limiting ring (12) abut against each other.

6. A high-pressure fine water mist nozzle according to claim 5, characterized in that, The first limiting ring (34) has a hollow fixing post (35) on the side away from the coarse filter screen (31). The outer wall of the hollow fixing post (35) has a fixing protrusion (36). The inner wall of the second limiting ring (12) has a fixing groove (13). The fixing protrusion (36) is embedded in the fixing groove (13).

Images