A high-pressure fine mist conversion nozzle

Abstract

This utility model relates to a high-pressure fine mist conversion nozzle, including a nozzle base, a connecting base, a DC nozzle, and a fine mist nozzle. The nozzle base and the connecting base are connected, and the nozzle base is connected to a spray gun through the connecting base. A groove is formed on the nozzle base, and a steel ball is placed inside the groove. A DC channel and a fine mist channel are respectively formed in the nozzle base at both ends of the groove. The steel ball slides along the groove between the DC channel and the fine mist channel. A sealing limiting element is provided at one end of each DC channel and fine mist channel. After being impacted by water, the steel ball embeds into one of the sealing limiting elements to seal the DC channel or the fine mist channel. A DC nozzle is arranged in the DC channel. A diffusion chamber is also formed in the nozzle base. Fine mist nozzles are arranged around the nozzle base. The fine mist nozzles, diffusion chamber, and fine mist channel are connected. This utility model is simple to manufacture and process, lightweight, space-flexible, easy to operate, and allows for easy switching between DC and fine mist modes.

Description

Technical Field

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

[0002] Fine mist fire suppression systems utilize special nozzles to break down water into extremely fine water mist under specific pressure for fire extinguishing. High-pressure fine mist switching nozzles typically combine direct-flow nozzles and fine mist nozzles, allowing for switching as needed. The direct-flow nozzles can form a water column, while the atomizing nozzles create a water mist over a specific area.

[0003] Currently, high-pressure fine mist conversion nozzles on the market occupy a large space. For example, the high-pressure fine water mist combination nozzle disclosed in patent publication number CN1751801A achieves the switching between remote nozzles and fine water mist nozzles by changing the working mode of the one-way valve in the reversing device. However, the function conversion of this nozzle is complicated and requires manual pushing and pulling. Moreover, the horizontal volume of the nozzle end is large, requiring a large placement space and being heavy, making it unsuitable for compact spaces. Summary of the Invention

[0004] To solve the problems of cumbersome switching and large space occupation of conventional conversion nozzles, this utility model provides a high-pressure fine mist conversion nozzle. By rolling steel balls to different positions, it is easy to realize the on / off switching control of different flow channels. At the same time, multiple atomizing nozzles are evenly distributed around the DC nozzle, so as to achieve a compact nozzle structure and small space occupation.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A high-pressure fine mist conversion nozzle includes a nozzle base, a connecting base, a DC nozzle and a fine mist nozzle. The nozzle base and the connecting base are connected. The nozzle base is connected to the spray gun through the connecting base, which facilitates the introduction of water flow from the spray gun into the nozzle base. A sliding groove is provided on the nozzle base, and a steel ball is placed in the sliding groove. The nozzle seats at both ends of the chute are respectively provided with a direct current channel and a fine mist channel. The steel ball slides along the chute between the direct current channel and the fine mist channel, and can block the channel it slides into. One end of the direct current channel and the fine mist channel are respectively provided with a sealing limiter. After being impacted by water, the steel ball embeds into one of the sealing limiters to close the direct current channel or the fine mist channel, thereby improving the sealing performance of the steel ball in blocking the channel. The DC channel is equipped with the DC nozzle, which facilitates the flow of water into the DC nozzle; the nozzle seat is also provided with a diffusion cavity, and multiple fine mist nozzles are arranged circumferentially around the nozzle seat. The fine mist nozzles are connected to the diffusion cavity inward, and the diffusion cavity is connected to the fine mist channel.

[0006] Furthermore, the connecting seat is a cylinder with a "convex" cross-section. The small-diameter end of the connecting seat is threaded and fixed to the spray gun, which facilitates the installation and fixing of the entire conversion nozzle. A connecting channel is provided inside the connecting seat, and the connecting channel runs through the connecting seat. The connecting channel is stepped, and the step changes are tapered to form a transition tapered hole.

[0007] Furthermore, the nozzle seat is threadedly connected to the connecting seat, and one end of the nozzle seat extends into the connecting channel and is threadedly connected to the connecting channel; the slide groove is waist-shaped, and one end of the slide groove extends to the middle of the nozzle seat and is correspondingly connected to the center of the transition cone hole.

[0008] Furthermore, the DC channel is centrally located within the nozzle holder, penetrates the nozzle holder and the diffusion cavity, and the diffusion cavity divides the DC channel into a head section and a tail section. The diameter of the head section is larger than that of the tail section, and the tail section is stepped, with one end of the tail section connected to the slide groove. The tail section and the fine mist channel have the same structure. The fine mist channel is eccentrically arranged in the nozzle seat. The diffusion cavity is a circular cavity. The diffusion cavity, the fine mist channel and the slide are connected in sequence.

[0009] Furthermore, the steel ball is embedded to a depth of at least one-third of the diameter of the steel ball into the sealing limiting member, ensuring the stability of the steel ball under the impact of water flow; the sealing limiting member includes a fixing ring and a sealing ring, the fixing ring is a stepped ring body, the sealing ring is sleeved on the fixing ring, the inner ring surface of the sealing ring is spherical, the steel ball is tightly pressed against the inner ring surface of the sealing ring, and a spherical seal is formed between the steel ball and the inner ring surface of the sealing ring, ensuring the reliability of the seal.

[0010] Furthermore, a limiting plate is provided on the bottom surface of the chute, and the limiting plate, together with the fixing ring, clamps the sealing ring; the limiting plate is a magnetic plate body, and the limiting plate is magnetically connected to the steel ball, and the weight of the steel ball is greater than the magnetic force of the limiting plate; round holes are opened at both ends of the limiting plate, and the diameter of the round holes is greater than the maximum diameter of the inner ring surface of the sealing ring, so as to ensure that after the steel ball is tightly pressed against the sealing ring, there is a gap between the surface of the steel ball and the round hole.

[0011] Furthermore, the DC nozzle includes a DC nozzle body and a flow stabilizer. The DC nozzle body is threadedly connected to the DC channel. A DC cavity is formed inside the DC nozzle body. The DC cavity penetrates the DC nozzle body. The DC cavity includes a long channel and a short channel. The length of the long channel is four times the length of the short channel, and the diameter of the long channel is 4 to 5 times the diameter of the short channel. There is a tapered transition between the long channel and the short channel. A flow stabilizer is installed in the long channel to prevent water turbulence. The flow stabilizer is a long plate with a "Y" shaped cross-section. The length of the flow stabilizer is less than the length of the long channel, and one end of the flow stabilizer rests against the end of the short channel.

[0012] Furthermore, the fine mist nozzle is threadedly connected to the nozzle seat. The fine mist nozzle includes a fine mist nozzle body, a swirling core, a guide column, and a nozzle. The swirling core is internally threaded onto the fine mist nozzle body. After the upper diameter of the swirling core is reduced, there is a gap between it and the inner wall of the fine mist nozzle body. Water holes are opened in the upper part of the swirling core. A guide column is sleeved on the upper end of the swirling core. Multiple swirling channels are provided circumferentially on the upper end face of the guide column. The swirling channels are inclined and diverged outward along the radial direction of the guide column. The nozzle, guide column, and swirl core are connected in sequence. The nozzle has an inner conical hole and an outer conical hole that penetrate the nozzle. The upper end of the guide column is tightly pressed against the inner conical hole. The taper of the inner conical hole is greater than that of the outer conical hole, and the depth of the inner conical hole is greater than that of the outer conical hole.

[0013] The beneficial effects of this utility model through the above technical solution are: This utility model features a reasonable structural design. A direct-flow nozzle is positioned in the center of the nozzle holder, while multiple fine-mist nozzles are arranged around the holder, achieving a compact overall nozzle structure. This design simplifies manufacturing, reduces weight, and allows for flexible space utilization. The direct-flow nozzle is supplied with water via a direct-flow channel, while the fine-mist nozzles are supplied via a fine-mist channel. The opening and closing of both channels are controlled by steel balls. A sliding groove and transition cone hole facilitate control of the steel ball's range of motion, allowing it to slide only between the direct-flow and fine-mist channels.

[0014] When the steel ball of this invention slides to the inlet end of the DC channel, it is impacted by the water flow and presses firmly against the sealing limit member at the DC channel, thereby blocking the DC channel and disabling the DC nozzle. Similarly, when the steel ball slides to the inlet end of the fine mist channel, it is impacted by the water flow and presses firmly against the sealing limit member at the fine mist channel, thus blocking the fine mist channel and disabling the fine mist nozzle. The sliding of the steel ball only requires changing the direction of the nozzle, making operation convenient and quick.

[0015] This invention limits the embedment depth of the steel ball into the sealing limiting component to at least one-third of the steel ball's diameter to ensure the ball's stability. Combined with the magnetic attraction of the limiting plate, even fluctuations in water pressure can reduce the impact on the steel ball. The sealing ring in both the steel ball and the sealing limiting component is a spherical seal, ensuring reliable sealing. The spherical surface of the sealing ring also facilitates guiding the steel ball, ensuring that the steel ball accurately seals the inlet position of the channel. Attached Figure Description

[0016] Figure 1 This is a front view of a high-pressure fine mist conversion nozzle of this utility model.

[0017] Figure 2 This is a cross-sectional view of a high-pressure fine mist conversion nozzle according to this utility model.

[0018] Figure 3 This is a disassembled schematic diagram of a high-pressure fine mist conversion nozzle according to the present invention.

[0019] Figure 4 This is a schematic diagram showing the application status of the sealing and limiting component of a high-pressure fine mist conversion nozzle according to this utility model.

[0020] Figure 5 This is a schematic diagram of a sealing and limiting component for a high-pressure fine mist conversion nozzle according to this utility model.

[0021] Figure 6 This is a cross-sectional view of a DC nozzle of a high-pressure fine mist conversion nozzle according to this utility model.

[0022] Figure 7 This is a schematic diagram of a flow stabilizer for a high-pressure fine mist conversion nozzle according to this utility model.

[0023] Figure 8 This is a cross-sectional view of a high-pressure fine mist conversion nozzle according to this utility model.

[0024] Figure 9 This is a schematic diagram showing the disassembled fine mist nozzle of a high-pressure fine mist conversion nozzle according to this utility model.

[0025] The attached diagram is labeled as follows: 1 Nozzle holder, 2 Connecting seat, 211 Connecting channel, 212 Transition cone hole, 3 Direct current nozzle, 4 Fine mist nozzle, 5 Sealing ring one, 6 Slide groove, 7 Steel ball, 8 Direct current channel, 81 Head section, 82 Tail section, 9 Fine mist channel, 10 Diffusion chamber, 11 Sealing limiter, 12 Fixing ring, 121 Outer flange, 13 Sealing ring, 131 Inner flange, 14 Limiting plate, 141 Round hole, 15 Direct current nozzle body, 16 Direct current chamber, 161 Long channel, 162 Short channel, 17 Flow stabilizer, 18 Sealing ring two, 19 Fine mist nozzle body, 20 Swirl core, 201 Swirl channel, 21 Guide column, 22 Nozzle, 221 Inner cone hole, 222 Outer cone hole, 23 Sealing ring three, 24 Slot, 25 Water hole. Detailed Implementation

[0026] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings: like Figures 1-9 As shown, a high-pressure fine mist conversion nozzle includes a nozzle base 1, a connecting base 2, a direct current nozzle 3, and a fine mist nozzle 4. The connecting base 2 is used to connect the entire conversion nozzle to the spray gun. The spray gun here can be the spray gun of the high-energy battery-type backpack high-pressure fine water mist fire extinguishing device disclosed in patent publication number CN104307126A, whose spray gun outlet is equipped with a fine water mist nozzle. The conversion nozzle in this embodiment can replace the fine water mist nozzle and be installed with the spray gun to realize specific application scenarios.

[0027] The connecting seat 2 is a cylinder with a "convex" cross-section. The small diameter end of the connecting seat 2 is threaded and fixed to the spray gun. A connecting channel 211 is provided inside the connecting seat 2. The connecting channel 211 also has a "convex" cross-section. The connecting channel 211 passes through the connecting seat 2. The connecting channel 211 is stepped. The step change of the connecting channel 211 is tapered to form a transition tapered hole 212.

[0028] The nozzle holder 1 and the connecting seat 2 are connected. Specifically, the nozzle holder 1 and the connecting seat 2 are threadedly connected and fixed. One end of the nozzle holder 1 extends into the large-diameter end of the connecting channel 211 and is threadedly connected to the connecting channel 211. A sealing ring 5 is provided at the connection between the nozzle holder 1 and the connecting seat 2 to ensure a reliable connection and prevent water leakage. Thus, the nozzle holder 1 is connected to the spray gun through the connecting seat 2, and water from the spray gun flows into the nozzle holder 1 through the connecting channel 211.

[0029] A groove 6 is provided on the nozzle holder 1. The groove 6 is waist-shaped and one end extends to the middle of the nozzle holder 1 and is connected to the center of the transition cone hole 212. A steel ball 7 is provided in the groove 6 and can move within the length of the groove 6.

[0030] A direct current channel 8 and a fine mist channel 9 are respectively formed in the nozzle holders 1 at both ends of the chute 6. Both the direct current channel 8 and the fine mist channel 9 are straight channels without bends. The direct current channel 8 is centrally located in the nozzle holder 1 and runs through the nozzle holder 1. A diffuser cavity 10 is also formed in the nozzle holder 1. The diffuser cavity 10 is a circular cavity. The direct current channel 8 runs through the diffuser cavity 10 and divides the direct current channel 8 into a head section 81 and a tail section 82. The diameter of the head section 81 is larger than that of the tail section 82. The tail section 82 is stepped and one end is connected to the chute 6.

[0031] The tail section 82 and the fine mist channel 9 have the same structure. The fine mist channel 9 is eccentrically arranged inside the nozzle seat 1. The diffuser cavity 10 is connected to the fine mist channel 9, and the fine mist channel 9 is located at the edge of the diffuser cavity 10. The diffuser cavity 10, the fine mist channel 9, and the chute 6 are connected in sequence, allowing water to flow through the chute 6 and the fine mist channel 9 into the interior of the diffuser cavity 10. The chute 6 is also connected to the direct current channel 8, allowing water to flow from the chute 6 into the direct current channel 8.

[0032] The direction of water flow in the chute 6 can be controlled by the steel ball 7. The steel ball 7 slides along the chute 6 between the direct current channel 8 and the fine mist channel 9. When the steel ball 7 corresponds to the direct current channel 8, the direct current channel 8 can be closed. When the steel ball 7 corresponds to the fine mist channel 9, the fine mist channel 9 can be closed.

[0033] To improve the reliability of the closed channels, sealing limiters 11 are respectively provided at one end of the direct current channel 8 and the fine mist channel 9, with the sealing limiters 11 located at the inlet end of the channel. After being impacted by water, the steel ball 7 embeds itself into one of the sealing limiters 11 to seal either the direct current channel 8 or the fine mist channel 9; the steel ball 7 tightly presses against the sealing limiter 11 to achieve a tight seal. It should be noted that the depth to which the steel ball 7 is embedded in the sealing limiter 11 is at least one-third of the diameter of the steel ball 7 to ensure stable embedding of the steel ball 7 and reduce the impact of water flow pressure on the sealing effect of the steel ball 7.

[0034] In this embodiment, the sealing limiting component 11 includes a fixing ring 12 and a sealing ring 13. The fixing ring 12 is a stepped ring body. The fixing ring 12 is threadedly connected to the nozzle seat 1, that is, the fixing ring 12 can be threadedly fixed to the inlet end of the DC channel 8 and the fine mist channel 9.

[0035] A sealing ring 13, made of rubber, is fitted over the retaining ring 12. To prevent the sealing ring 13 from detaching from the retaining ring 12, one end of the retaining ring 12 is bent outward to form an annular outer flange 121, and one end of the sealing ring 13 is bent inward to form an annular inner flange 131. The sealing ring 13 is fitted over the retaining ring 12, and the inner flange 131 and the outer flange 121 hold it in place, preventing them from detaching.

[0036] The inner surface of the sealing ring 13 is spherical. After being impacted by the water flow, the steel ball 7 presses tightly against the inner surface of the sealing ring 13, forming a spherical seal between the steel ball 7 and the inner surface of the sealing ring 13, thereby achieving reliable sealing. At this time, the depth of the steel ball 7 inserted into the sealing ring 13 is at least one-third of the diameter of the steel ball 7.

[0037] Meanwhile, a limiting plate 14 is also provided on the bottom surface of the chute 6. The limiting plate 14 is oblong in shape, and its edge fits against the inside of the chute 6. During installation, the limiting plate 14 can be interference-fitted with the chute 6 to fix it in place; or it can be fixed to the nozzle seat 1 by using set screws on both sides of the middle of the limiting plate 14. After one end of the set screw is connected to the limiting plate 14, it does not protrude from the limiting plate 14, ensuring the flatness of one surface of the limiting plate 14. In this case, the limiting plate 14, together with the fixing ring 12, clamps the sealing ring 13, preventing the sealing ring 13 from moving axially.

[0038] The limiting plate 14 has circular holes 141 at both ends, through which the steel ball 7 can pass and press tightly against the sealing ring 13. Requirements: The diameter of the circular hole 141 is larger than the maximum diameter of the inner ring surface of the sealing ring 13. This ensures that after the steel ball 7 presses tightly against the sealing ring 13, there is a gap between the surface of the steel ball 7 and the circular hole 141, ensuring that the circular hole 141 does not interfere with the steel ball 7 pressing against the sealing ring 13. The minimum diameter of the inner ring surface of the sealing ring 13 is smaller than the inner diameter of the fixing ring 12. This ensures that after the steel ball 7 presses tightly against the sealing ring 13, it will not contact the fixing ring 12, preventing the fixing ring 12 from affecting the effectiveness of the steel ball 7 pressing against the sealing ring 13. In other words, when the steel ball 7 presses tightly against the sealing ring 13, it does not contact the fixing ring 12 or the limiting ring, ensuring that the pressure of the water flow impacting the steel ball 7 is entirely applied to the sealing ring 13.

[0039] The limiting plate 14 can be a magnetic plate, and the steel ball 7 can also be a magnetic sphere. The limiting plate 14 and the steel ball 7 are magnetically connected. Because the embedding depth of the steel ball 7 is limited, and the steel ball 7 is also magnetically connected to the limiting plate 14, the stability of the steel ball 7's embedding is improved, ensuring reliable sealing. The weight of the steel ball 7 is greater than the magnetic force of the limiting plate 14, enabling the steel ball 7 to detach from the circular hole 141 under its own weight.

[0040] The DC nozzle 3 is used to spray a DC water jet. During installation, the DC nozzle 3 is installed in the DC channel 8. The DC nozzle 3 includes a DC nozzle body 15 and a flow stabilizer 17. The DC nozzle body 15 is threadedly connected in the DC channel 8, and then the DC nozzle body 15 passes through the diffuser cavity 10. The two ends of the DC nozzle body 15 are threadedly connected and fixed to the head section 81 and the tail section 82, respectively, and sealing rings 18 are sleeved on both ends of the DC nozzle body 15.

[0041] A DC nozzle body 15 has a DC cavity 16 extending through it. The DC cavity 16 includes a long channel 161 and a short channel 162, both of which are cylindrical. The length L of the long channel 161 is four times the length L of the short channel 162. The diameter D of the long channel 161 is 4 to 5 times the diameter D of the short channel 162. There is a tapered transition between the long channel 161 and the short channel 162. By limiting the shape and size of the DC nozzle 3, water flow friction is reduced, spray pressure is increased, and the range of the DC nozzle 3 is improved.

[0042] Meanwhile, a flow stabilizer 17 is fixedly installed within the long channel 161. The flow stabilizer 17 is a long plate with a "Y"-shaped cross-section. The flow stabilizer 17 evenly divides the long channel 161 into three spaces. The length of the flow stabilizer 17 is shorter than the length of the long channel 161, and one end of the flow stabilizer 17 rests against the end of the short channel 162. The flow stabilizer 17 can guide the water flow and prevent the range from being shortened due to water flow turbulence. After the water enters the DC nozzle 3, it flows within the long channel 161 and passes through the flow stabilizer 17. The flow stabilizer 17 divides the water flow into three independent streams, which converge in the short channel 162 and are finally ejected at high speed.

[0043] The fine mist nozzle 4 is used to spray atomized water. During installation, six fine mist nozzles 4 are arranged circumferentially around the nozzle base 1, and each fine mist nozzle 4 is connected to the diffuser cavity 10 inward. The water flow direction supplied to the fine mist nozzle 4 is: chute 6 → fine mist channel 9 → diffuser cavity 10 → fine mist nozzle 4.

[0044] The fine mist nozzle 4 is threadedly connected to the nozzle holder 1. The fine mist nozzle 4 includes a fine mist nozzle body 19, a swirling core 20, a guide column 21, and a nozzle 22. The fine mist nozzle body 19 is threadedly fixed to the nozzle holder 1. A sealing ring 23 is provided on the outer sleeve of the fine mist nozzle body 19 to ensure the sealing of the threaded connection. The interior of the fine mist nozzle body 19 is hollow.

[0045] The fine mist nozzle body 19 is internally threaded to a swirling core 20. The swirling core 20 is hollow inside, with its lower diameter larger than its upper diameter. The lower part of the swirling core 20 is threaded to the fine mist nozzle body 19. A slot 24 is provided at the lower end of the swirling core 20 to facilitate screwing. After the upper diameter of the swirling core 20 is reduced, there is a gap between it and the inner wall of the fine mist nozzle body 19. Water holes 25 are provided on both sides of the upper part of the swirling core 20.

[0046] A guide column 21 is fitted onto the upper end of the swirl core 20. The guide column 21 can close the upper end of the swirl core 20, causing water to flow through the water hole 25 into the gap between the swirl core 20 and the fine mist nozzle body 19. Three swirling channels 201 are circumferentially arranged on the upper end face of the guide column 21, and the swirling channels 201 diverge radially outward along the guide column 21. The nozzle 22, the guide column 21, and the swirl core 20 abut against each other in sequence. That is, after tightening the swirl core 20, the swirl core 20 can press down the guide column 21 and the nozzle 22, fixing them inside the fine mist nozzle body 19.

[0047] The nozzle 22 has an inner conical hole 221 and an outer conical hole 222 that penetrate the nozzle 22. The upper end of the guide column 21 is tightly pressed against the inner conical hole 221. The inner conical hole 221 covers the swirling channel 201. The taper of the inner conical hole 221 is greater than that of the outer conical hole 222, and the depth of the inner conical hole 221 is greater than that of the outer conical hole 222. The water flow between the swirling core 20 and the fine mist nozzle body 19 impacts and collides after passing through the swirling channel 201, forming mist droplets, which are finally atomized and sprayed outward through the outer conical hole 222.

[0048] The principle of this invention is as follows: A high-pressure fine mist conversion nozzle is installed on a spray gun. To use the fine mist function, the spray gun is first turned off, and the operator manually rotates the spray gun to drive the conversion nozzle. With the spray gun off, the pressure in the high-pressure fine mist conversion nozzle is released, and the steel ball 7 slides down to one end of the slide rail, located at the inlet end of the DC channel 8. Then, the spray gun is turned on. At the moment of activation, driven by water pressure, the steel ball 7 presses tightly against the sealing ring 13 of the DC channel 8, blocking the DC channel 8. Thus, the water flows sequentially through the fine mist channel 9 and the diffuser chamber 10, and is sprayed out as a fine water mist through the six fine mist nozzles 4.

[0049] When in use, the fine mist nozzle 4 can form a diffused, wide-coverage mist water flow, which has the advantages of wide coverage and good adsorption. It reduces the temperature by absorbing heat through water mist evaporation, while isolating oxygen to suffocate the flame. The fine mist nozzle 4 relies on the centrifugal swirling channel 201 to promote water flow collision and produce finer mist particles with a range of 3-5 meters. It is mainly used for smoke and dust removal, heat insulation and cooling, and oxygen isolation. It can be used to extinguish fires involving electrical equipment (Class E) and control fires involving flammable liquids (Class B).

[0050] To use the DC function, first turn off the spray gun and rotate it to rotate the switching nozzle. With the spray gun off, the pressure in the high-pressure fine mist switching nozzle is released, and the steel ball 7 slides to the other end of the slide groove 6 under gravity, positioned in the fine mist channel 9. Then, turn on the spray gun. At the moment of activation, driven by water pressure, the steel ball 7 presses tightly against the sealing ring 13 of the fine mist channel 9, blocking it. Water then flows through the DC channel 8 into the DC nozzle 3 and is sprayed out through it.

[0051] The DC sprinkler head 3 forms a concentrated, continuous columnar water jet, offering advantages such as long range and strong impact. It primarily extinguishes fires by cooling the surface of burning materials and washing away combustibles with a powerful water jet. The DC sprinkler head 3 uses an internal flow stabilizer 17 to stabilize the water flow, ensuring a long range of 8-10 meters. It is mainly used to extinguish fires at a distance, establish firebreaks, and facilitate personnel access to the fire scene. It is also used to extinguish fires on the surface of solid materials (Class A) and to cool high-temperature equipment or building structures.

[0052] It should be noted that the switching control between the DC nozzle 3 and the fine mist nozzle 4 is actually achieved by changing the position of the steel ball 7. When the steel ball 7 blocks the DC channel 8, the fine mist nozzle 4 works normally. When the steel ball 7 blocks the fine mist channel 9, the DC nozzle 3 works normally.

[0053] To change the position of steel ball 7, the spray gun must first be turned off, and then the position of the switching nozzle must be rotated. To clearly indicate the switching direction, a double arrow is engraved on the outer surface of the nozzle holder 1, with the words "Direct Current" and "Fine Mist" marked at either end. Rotate the switching nozzle according to the arrow indication, ensuring the "Fine Mist" arrow points upwards. At this point, steel ball 7 blocks the direct current channel 8, opening the fine mist channel 9. Conversely, after rotating the switching nozzle, ensure the "Direct Current" arrow points upwards; at this point, steel ball 7 blocks the fine mist channel 9, opening the direct current channel 8.

[0054] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A high-pressure fine mist conversion nozzle, characterized in that, It includes a nozzle seat (1), a connecting seat (2), a DC nozzle (3) and a fine mist nozzle (4). The nozzle seat (1) and the connecting seat (2) are connected. The nozzle seat (1) is connected to the spray gun through the connecting seat (2). A sliding groove (6) is provided on the nozzle seat (1), and a steel ball (7) is provided in the sliding groove (6). The nozzle seats (1) at both ends of the slide (6) are respectively provided with a direct current channel (8) and a fine mist channel (9). The steel ball (7) slides along the slide (6) between the direct current channel (8) and the fine mist channel (9). A sealing limiter (11) is provided at one end of the direct current channel (8) and the fine mist channel (9). After being impacted by water, the steel ball (7) is embedded in one of the sealing limiters (11) to close the direct current channel (8) or the fine mist channel (9). The DC channel (8) is provided with the DC nozzle (3); the nozzle seat (1) is also provided with a diffusion cavity (10), and multiple fine mist nozzles (4) are provided around the nozzle seat (1) in a circumferential direction. The fine mist nozzles (4) are connected to the diffusion cavity (10) inward, and the diffusion cavity (10) is connected to the fine mist channel (9).

2. The high-pressure fine mist conversion nozzle according to claim 1, characterized in that, The connecting seat (2) is a cylinder with a "convex" cross-section. The small diameter end of the connecting seat (2) is threaded and fixed to the spray gun. A connecting channel (211) is provided inside the connecting seat (2). The connecting channel (211) passes through the connecting seat (2). The connecting channel (211) is stepped. The step change of the connecting channel (211) is tapered to form a transition tapered hole (212).

3. A high-pressure fine mist conversion nozzle according to claim 2, characterized in that, The nozzle seat (1) is threadedly connected to the connecting seat (2). One end of the nozzle seat (1) extends into the connecting channel (211) and is threadedly connected to the connecting channel (211). The slide groove (6) is waist-shaped. One end of the slide groove (6) extends to the middle of the nozzle seat (1) and is connected to the center of the transition cone hole (212).

4. A high-pressure fine mist conversion nozzle according to claim 1, characterized in that, The DC channel (8) is centrally located inside the nozzle seat (1). The DC channel (8) penetrates the nozzle seat (1) and the diffuser cavity (10). The diffuser cavity (10) divides the DC channel (8) into a head section (81) and a tail section (82). The diameter of the head section (81) is larger than that of the tail section (82). The tail section (82) is stepped. One end of the tail section (82) is connected to the slide groove (6). The tail section (82) and the fine mist channel (9) have the same structure. The fine mist channel (9) is eccentrically arranged in the nozzle seat (1). The diffusion cavity (10) is a circular cavity. The diffusion cavity (10), the fine mist channel (9) and the slide (6) are connected in sequence.

5. A high-pressure fine mist conversion nozzle according to claim 1, characterized in that, The steel ball (7) is embedded into the sealing limiting member (11) to a depth of at least one-third of the diameter of the steel ball (7); the sealing limiting member (11) includes a fixing ring (12) and a sealing ring (13). The fixing ring (12) is a stepped ring body, and the sealing ring (13) is sleeved on the fixing ring (12). The inner ring surface of the sealing ring (13) is spherical, and the steel ball (7) is pressed against the inner ring surface of the sealing ring (13). A spherical seal is formed between the steel ball (7) and the inner ring surface of the sealing ring (13).

6. A high-pressure fine mist conversion nozzle according to claim 5, characterized in that, The bottom surface of the chute (6) is also provided with a limiting plate (14), which cooperates with the fixing ring (12) to clamp the sealing ring (13); the limiting plate (14) is a magnetic plate, and the limiting plate (14) is magnetically connected to the steel ball (7). The weight of the steel ball (7) is greater than the magnetic force of the limiting plate (14); the two ends of the limiting plate (14) are provided with round holes (141), the diameter of the round holes (141) is greater than the maximum diameter of the inner ring surface of the sealing ring (13), so as to ensure that after the steel ball (7) is tightly pressed against the sealing ring (13), there is a gap between the surface of the steel ball (7) and the round holes (141).

7. A high-pressure fine mist conversion nozzle according to claim 1, characterized in that, The DC nozzle (3) includes a DC nozzle body (15) and a flow stabilizer (17). The DC nozzle body (15) is threaded into the DC channel (8). A DC cavity (16) is opened in the DC nozzle body (15). The DC cavity (16) penetrates the DC nozzle body (15). The DC cavity (16) includes a long channel (161) and a short channel (162). The length of the long channel (161) is four times the length of the short channel (162). The diameter of the long channel (161) is 4 to 5 times the diameter of the short channel (162). There is a tapered transition between the long channel (161) and the short channel (162). A flow stabilizer (17) is provided in the long channel (161). The flow stabilizer (17) is a long plate with a "Y" shaped cross-section. The length of the flow stabilizer (17) is less than the length of the long channel (161). One end of the flow stabilizer (17) abuts against the end of the short channel (162).

8. A high-pressure fine mist conversion nozzle according to claim 1, characterized in that, The fine mist nozzle (4) is threadedly connected to the nozzle seat (1). The fine mist nozzle (4) includes a fine mist nozzle body (19), a swirling core (20), a guide column (21), and a nozzle (22). The fine mist nozzle body (19) is internally threaded with the swirling core (20). After the upper diameter of the swirling core (20) is reduced, there is a gap between it and the inner wall of the fine mist nozzle body (19). A water hole (25) is opened on the upper part of the swirling core (20). A guide column (21) is sleeved on the upper end of the swirling core (20). Multiple swirling channels (201) are provided circumferentially on the upper end face of the guide column (21). The swirling channels (201) are radially inclined and diverge outward along the guide column (21). The nozzle (22), the guide column (21) and the swirl core (20) are connected in sequence. The nozzle (22) has an inner conical hole (221) and an outer conical hole (222) that penetrate the nozzle (22). The upper end of the guide column (21) is tightly pressed against the inner conical hole (221). The taper of the inner conical hole (221) is greater than that of the outer conical hole (222), and the depth of the inner conical hole (221) is greater than that of the outer conical hole (222).

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