Wear-resistant nozzle machine core with high sealing performance

Abstract

The invention aims to provide a high-sealing wear-resistant nozzle machine core which comprises a central pipe and a water spraying assembly, a plurality of through holes distributed at intervals are formed in the outer side wall of the central pipe, the water spraying assembly comprises a nozzle, a first sealing ring and a second sealing ring, a plurality of spraying holes are formed in the nozzle, and the nozzle is coaxially and rotatably arranged on the central pipe; the first sealing ring and the second sealing ring are coaxially arranged on the central pipe in a sleeving mode, and the first sealing ring and the second sealing ring seal the two axial ends of the spray head correspondingly. Therefore, sealing performance is improved, water flow seepage is prevented, wear resistance is improved, and service life is prolonged.

Description

Technical Field

[0001] This invention relates to the technical field of cooling equipment, and in particular to a high-sealing, wear-resistant nozzle core. Background Technology

[0002] Cooling towers, as key heat dissipation equipment in industrial production and central air conditioning systems, primarily function to exchange heat through gas-liquid contact. The nozzle assembly, as a core component of the cooling tower, directly determines the uniformity of spraying, heat dissipation efficiency, and operational stability. During operation, the nozzles rotate at high speed supported by the water supply pipe, uniformly spraying water into the annular chamber within the tower, ensuring full contact between the water and air, thereby quickly removing heat generated by industrial production or refrigeration systems. For example, a hyperbolic hyperbolic cooling tower with water vector atomization suspension, as disclosed in CN219624524U, includes a water vector atomization suspension device comprising a water supply pipe and a nozzle assembly. The nozzle assembly includes a nozzle and multiple fan blades. The nozzle is connected to the water supply pipe, which supplies high-temperature water to the nozzle. The fan blades are arranged circumferentially around the water supply pipe and can rotate synchronously with the nozzle around the water supply pipe in a horizontal plane. The spray direction of the nozzle forms an angle with the axis of the water supply pipe, configured such that when the nozzle sprays high-temperature water, it rotates around the water supply pipe. In this way, the nozzle can spray water out in a rotating state to make even contact with the air, so as to remove the heat generated by industrial production or refrigeration system.

[0003] However, existing nozzle mechanisms have the following shortcomings in practical use: While the water flow from the nozzle can utilize the reaction force to rotate the nozzle around the axis of the water supply pipe, achieving high-speed rotation for a uniform spray requires higher water pressure to generate a greater reaction force. Under prolonged high-speed rotation, the nozzle and water supply pipe experience continuous high-speed friction, inevitably leading to wear and increased gaps. Under high water pressure, this gap can cause water to spray or leak, resulting in a drop in water pressure and ultimately preventing the nozzle from rotating at the required spray speed. Therefore, this application proposes a high-sealing, wear-resistant nozzle mechanism. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a highly sealed and wear-resistant nozzle core that reduces wear and prevents water leakage when rotating and floating.

[0005] The objective of this invention is achieved through the following technical solution: A high-sealing, wear-resistant nozzle core includes: A central tube, wherein a plurality of spaced-apart perforations are formed on the outer side wall of the central tube; and A water spray assembly includes a nozzle, a first sealing ring, and a second sealing ring. The nozzle has several spray holes and is coaxially rotatably mounted on a central tube so that each spray hole communicates with the through hole. The first sealing ring and the second sealing ring are coaxially sleeved on the central tube, and the first sealing ring and the second sealing ring respectively seal the two ends of the nozzle along its axial direction.

[0006] Optionally, a bottom ring is provided at the lower end of the nozzle, and the second sealing ring is used to seal the gap between the bottom ring and the central tube.

[0007] Optionally, the water spray assembly further includes a third sealing ring, which is sleeved on the central tube and has an annular groove. The bottom ring is provided with an annular rail, which is adapted to be inserted into the annular groove.

[0008] Optionally, the water spray assembly further includes an anti-detachment plate disposed at the end of the central tube, the anti-detachment plate being used to prevent the nozzle from detaching from the central tube.

[0009] Optionally, the water spray assembly further includes a cap disposed at the upper end of the nozzle, the cap being used to seal the upper end of the nozzle.

[0010] Optionally, the first sealing ring, the second sealing ring, and the third sealing ring are all made of graphene composite material.

[0011] Optionally, the nozzle is provided with an L-shaped groove, and the first sealing ring is located in the L-shaped groove.

[0012] Optionally, the upper end of the nozzle is provided with a first convex rail, the lower end of the nozzle is provided with a second convex rail, the upper part of the central tube is provided with a first slot, the lower end of the central tube is provided with a second slot, the first convex rail extends into the first slot without contact, and the second convex rail extends into the second slot without contact.

[0013] Compared with the prior art, the present invention has at least the following advantages: The high-sealing, wear-resistant nozzle core of this invention employs a first, second, and third sealing ring made of graphene composite material, which combines excellent hydrophobicity with high strength, significantly reducing the risk of water molecule leakage and improving wear resistance and service life. Through the matching design of the L-shaped groove and the recessed part of the central tube, and the interlocking structure of the bottom ring rail and the third sealing ring groove, multiple sealing defenses are constructed. Combined with the optimized ratio of the nozzle orifice and gap opening area, high sealing performance is achieved. Furthermore, the non-contact insertion design of the first and second convex rails of the nozzle with the first and second slots of the central tube reduces the water pressure at both ends of the ring chamber, further improving sealing performance. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a partial cross-sectional structural diagram of a high-sealing, wear-resistant nozzle core according to an embodiment of the present invention; Figure 2 This is a schematic cross-sectional view of the high-sealing, wear-resistant nozzle core according to one embodiment of the present invention; Figure 3 for Figure 2 A magnified schematic diagram of the structure of part A in the diagram; Figure 4 for Figure 2 A magnified schematic diagram of the partial structure of B in the diagram; Figure 5 This is a partial cross-sectional structural diagram of a nozzle according to an embodiment of the present invention; Figure 6 This is a partial cross-sectional structural diagram of the central tube according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the bottom ring according to one embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. High-sealing, wear-resistant nozzle core; 10. Center tube; 100. Perforation; 101. First slot; 102. Second slot; 20. Nozzle; 200. Spray hole; 201. Bottom ring; 2010. Side groove; 2011. Ring rail; 202. L-shaped groove; 203. First convex rail; 204. Second convex rail; 205. Groove; 206. Ring chamber; 21. First sealing ring; 22. Second sealing ring; 23. Third sealing ring; 230. Ring groove; 24. Anti-detachment plate; 25. Cover; 250. Clearance groove; 251. Boss. Detailed Implementation

[0017] To facilitate understanding of the present invention, a more comprehensive description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the invention.

[0018] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 the embodiments of the present invention 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, they should not be construed as limitations on the present invention.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0021] like Figures 1 to 7 As shown, in one embodiment, a high-sealing and wear-resistant nozzle core 1 includes a central tube 10 and a water spray assembly. The outer wall of the central tube 10 is provided with a plurality of spaced perforations 100. The water spray assembly includes a nozzle 20, a first sealing ring 21 and a second sealing ring 22. The nozzle 20 is provided with a plurality of spray holes 200. The nozzle 20 is rotatably mounted on the central tube 10 so that each spray hole 200 communicates with the perforation 100. The first sealing ring 21 and the second sealing ring 22 are coaxially sleeved on the central tube 10, and the first sealing ring 21 and the second sealing ring 22 respectively seal the two ends of the nozzle 20 in the axial direction.

[0022] It should be noted that the central tube 10 is a tubular structure, with its lower end connected to the water source and its upper end face closed. Several perforations 100 are formed on the side of the central tube 10, and each perforation 100 is distributed at equal angles along the circumference of the central tube 10. Furthermore, the nozzle 20 is coaxially fitted onto the central tube 10. An annular groove 205 is formed on the inner wall of the nozzle 20. When the nozzle 20 is coaxially fitted onto the central tube 10, the annular groove 205 and the outer wall of the central tube 10 together form an annular chamber 206, and each perforation 100 communicates with the annular chamber 206. Several spray holes 200 are formed on the nozzle 20, and each spray hole 200 is distributed at equal angles along the circumference of the nozzle 20, and each spray hole 200 communicates with the annular chamber 206. The end of each spray hole 200 whose axis is away from the axis of the nozzle 20 is inclined upwards. This allows the water to be sprayed at an upward angle when it is ejected from each nozzle 200, thereby increasing the heat dissipation effect.

[0023] It should be noted that the inner diameter of the first sealing ring 21 is adapted to the outer diameter of the central tube 10, and the outer diameter of the first sealing ring 21 is adapted to the inner diameter of the nozzle 20. When the first sealing ring 21 is coaxially fitted onto the central tube 10 and located at the upper end of the central tube 10, the inner and outer walls of the first sealing ring 21 are tightly fitted to the outer wall of the central tube 10 and the inner wall of the nozzle 20, respectively. Similarly, the inner diameter of the second sealing ring 22 is adapted to the outer diameter of the central tube 10, and the inner diameter of the second sealing ring 22 is adapted to the inner diameter of the nozzle 20. When the second sealing ring 22 is coaxially fitted onto the central tube 10, the inner and outer walls of the second sealing ring 22 are tightly fitted to the outer wall of the central tube 10 and the inner wall of the nozzle 20, respectively. Thus, when the nozzle 20 rotates around the axis of the central tube 10 and slides along the axial direction of the central tube 10, the first sealing ring 21 and the second sealing ring 22 maintain the upper and lower ends of the sealed ring chamber 206. Furthermore, the first sealing ring 21 and the second sealing ring 22 have a certain width (i.e., a certain distance between their axial end faces, which is greater than the thickness of the nozzle 20 housing). This increases the area where the inner and outer side walls of the first sealing ring 21 and the second sealing ring 22 are tightly fitted with the outer side wall of the central tube 10 and the inner side wall of the nozzle 20, respectively, thereby increasing the axial stability of the nozzle 20 relative to the central tube 10 during rotation and sliding.

[0024] It should be noted that the inner and outer sidewalls of the first sealing ring 21 and the second sealing ring 22 are tightly fitted to the outer sidewall of the central tube 10 and the inner sidewall of the nozzle 20, respectively, making the gaps between the first sealing ring 21 / second sealing ring 22 and the central tube 10 and the nozzle 20 extremely small (i.e., the channels connecting the upper and lower ends of the annular chamber 206 to the external environment are extremely small). Since the two ends of the gaps are connected to the interior and exterior environments of the annular chamber 206, for ease of description, the gaps between the first sealing ring 21 / second sealing ring 22 and the central tube 10 and the nozzle 20 are defined as the upper through hole and the lower through hole, respectively. Furthermore, the sum of the opening areas of each nozzle 200 is greater than the sum of the opening areas of the upper through hole and the lower through hole, so that after the water flows from the central tube 10 into the annular chamber 206, the sum of the water output from each nozzle 200 will be greater than the sum of the water output from the upper through hole and the lower through hole.

[0025] It should be noted that, as is well known, water requires pressure to flow in a pipe. When water flows from the central pipe 10 into the annular chamber 206, it creates a pushing pressure within the annular chamber 206. Since the sum of the water output from each nozzle 200 is greater than the sum of the water output from the upper and lower through holes, most of the water in the annular chamber 206 is ejected into the nozzles 200, reducing the water pressure within the annular chamber 206. Consequently, the water pressure experienced by the upper and lower through holes is relatively low. Furthermore, because the gaps between the first sealing ring 21 / second sealing ring 22 and the central pipe 10 and nozzle 20 are extremely small, water needs to be ejected or seeped out through these gaps. If the pressure is greater than the sum of the water pressures on each nozzle 200, and the sum of the opening areas of each nozzle 200 and the sum of the opening areas of the upper and lower through holes are fixed, then the sum of the water pressures on the upper and lower through holes in the annular chamber 206 will remain less than the sum of the water pressures on each nozzle 200. And as water continues to spray from each nozzle 200, the water pressure in the annular chamber 206 will not reach the critical value of the gap between the first sealing ring 21 / second sealing ring 22 and the central tube 10 and the nozzle 20. In this way, the first sealing ring 21 and the second sealing ring 22 can seal the upper and lower ends of the nozzle 20 respectively.

[0026] like Figures 1 to 4 , Figure 7 As shown, in one embodiment, a bottom ring 201 is provided on the lower end of the nozzle 20, and a second sealing ring 22 is used to seal the gap between the bottom ring 201 and the central tube 10.

[0027] It should be noted that the lower end of the nozzle 20 is provided with a bottom ring 201 of an annular structure, which is fixed to the lower end face of the nozzle 20 by screws. Furthermore, an annular side groove 2010 is formed on the end face of the bottom ring 201 near the nozzle 20. The side groove 2010 tends to have an L-shaped structure. When the bottom ring 201 is set on the lower end face of the nozzle 20, the cross-section of the side groove 2010 is C-shaped. In this state, the lower end face of the nozzle 20 becomes an inner sidewall of the side groove 2010 in the axial direction. Furthermore, the inner sidewall of the second sealing ring 22 is tightly fitted with the outer sidewall of the central tube 10, and the outer sidewall of the second sealing ring 22 is tightly fitted with the sidewall of the side groove 2010, so that the bottom ring 201 and the second sealing ring 22 together seal the lower end of the annular chamber 206. Thus, when the nozzle 20 slides along the axial direction of the central tube 10, the two side walls of the side groove 2010 in the axial direction can drive the second sealing ring 22 to slide along the axial direction of the central tube 10, thereby keeping the second sealing ring 22 at the lower end of the sealed ring chamber 206.

[0028] like Figures 1 to 2 , Figure 4 , Figure 7 As shown, in one embodiment, the water spray assembly further includes a third sealing ring 23, which is sleeved on the central tube 10. The third sealing ring 23 has an annular groove 230, and the bottom ring 201 is provided with an annular rail 2011, which is adapted to be inserted into the annular groove 230.

[0029] It should be noted that the inner diameter of the third sealing ring 23 is adapted to the outer diameter of the central tube 10 so that the inner sidewall of the third sealing ring 23 is tightly fitted to the outer sidewall of the central tube 10. The end face of the third sealing ring 23 near the bottom ring 201 is provided with an annular groove 230 along the circumference, and the end face of the bottom ring 201 away from the nozzle 20 is provided with an annular rail 2011 along the circumference. Since the nozzle 20 is coaxially fitted on the central tube 10, the axis of the annular rail 2011 will also coincide with the axis of the central tube 10. Furthermore, the wall thickness of the annular rail 2011 is adapted to the groove width of the annular groove 230. When the bottom ring 201 drives the annular rail 2011 to be inserted into the annular groove 230, the inner and outer sidewalls of the annular rail 2011 are tightly fitted to the opposite sidewalls of the annular groove 230, thereby increasing the sealing performance of the lower end of the annular chamber 206. Furthermore, the opening of the annular groove 230 faces the nozzle 20, and its depth is greater than the axial sliding distance of the nozzle 20. Thus, when the nozzle 20 floats up to cause the bottom ring 201 to drive the annular rail 2011 to slide axially away from the annular groove 230, the annular rail 2011 remains engaged with the annular groove 230.

[0030] like Figures 1 to 3 As shown, in one embodiment, the water spray assembly further includes an anti-detachment plate 24, which is disposed at the end of the central tube 10 and is used to prevent the nozzle 20 from detaching from the central tube 10.

[0031] It should be noted that the anti-detachment plate 24 is coaxially mounted on the end face of the central tube 10 away from the bottom ring 201 by screws; the diameter of the anti-detachment plate 24 is larger than the diameter of the central tube 10, so that its four peripheral edges extend relative to the central tube 10; in the prior art, water is sprayed from each nozzle 20 and rotated by directional force. During the high-speed rotation of the nozzle 20, its downward gravity is dispersed radially due to the high-speed rotation, causing its own weight to decrease. When the upward push of the air flowing from the bottom of the cooling tower is greater than the weight of the nozzle 20 itself, the nozzle 20 will be in a suspended state. As the speed of the water jet increases and the upward thrust of the air increases, the nozzle 20 will float upward along the axis of the central tube 10 during rotation, and then detach from the central tube 10. Thus, when the nozzle 20 drives the first sealing ring 21 to slide upward, the end face of the first sealing ring 21 away from the bottom ring 201 abuts against the anti-detachment plate 24, thereby preventing the nozzle 20 from detaching from the central tube 10.

[0032] It should be noted that the length of the screw is greater than the thickness of the anti-detachment plate 24; when the screw is coaxially threaded through the anti-detachment plate 24 and screwed to the end face of the central tube 10, the anti-detachment plate 24 can rotate around the screw. Since the inner and outer side walls of the first sealing ring 21 are tightly fitted to the inner side wall of the nozzle 20 and the outer side wall of the central tube 10, the first sealing ring 21 inevitably rotates during the rotation of the nozzle 20; when the first sealing ring 21 contacts the side of the anti-detachment plate 24, it will cause the anti-detachment plate 24 to rotate relative to the screw, thereby reducing the friction between the first sealing ring 21 and the anti-detachment plate 24, and thus reducing the influence of the anti-detachment plate 24 on the rotation speed of the nozzle 20.

[0033] like Figures 1 to 3 As shown, in one embodiment, the water spray assembly further includes a cover 25, which is disposed at the upper end of the nozzle 20 and is used to seal the upper end of the nozzle 20.

[0034] It should be noted that the cover 25 is coaxially mounted on the nozzle 20 to seal the upper end of the nozzle 20, so that the nozzle 20 can drive the cover 25 to rotate around the axis of the central tube 10. A clearance groove 250 is provided on the end face of the cover 25 near the nozzle 20. When it is placed on the nozzle 20, the cover 25 and the end face of the central tube 10 together form a top chamber, and the anti-detachment plate 24 is located in the top chamber. Furthermore, a boss 251 is provided on the inner bottom wall of the clearance groove 250, and the inner diameter of the boss 251 is smaller than the outer diameter of the anti-detachment plate 24. It should be noted that the distance between the side of the boss 251 away from the inner bottom wall of the clearance groove 250 and the end face of the first sealing ring 21 near the cover 25 is greater than the thickness of the anti-detachment plate 24. When the nozzle 20 is stationary, under the action of its own weight, the nozzle 20 and the cover 25 cause the boss 251 to abut against the side of the anti-detachment plate 24 away from the central tube 10 from top to bottom, so as to prevent the nozzle 20 from sliding to the bottom of the central tube 10, thereby causing the annular chamber 206 to be misaligned with each perforation 100 and unable to communicate. When the nozzle 20 starts to rotate, and the upward buoyancy does not overcome the combined weight of the nozzle 20 and the cap 25, the cap 25 will drive the anti-detachment plate 24 to rotate via the boss 251. This reduces the friction between the cap 25 and the anti-detachment plate 24.

[0035] like Figures 1 to 4 As shown, in one embodiment, the first sealing ring 21, the second sealing ring 22, and the third sealing ring 23 are all graphene composite materials.

[0036] It should be noted that the first sealing ring 21, the second sealing ring 22, and the third sealing ring 23 are composites made of graphene as a reinforcing filler, combined with matrix materials such as rubber, polytetrafluoroethylene, and graphite. They possess excellent hydrophobicity, making it difficult for water molecules to adhere to and spread on their surface. Even if a small amount of water enters the gaps and comes into contact with the graphene surface, its hydrophobic properties prevent the formation of a continuous water film, thus reducing the amount of water permeating the gaps. Furthermore, they possess extremely high hardness and strength, making them less susceptible to scratches and damage when subjected to friction and wear.

[0037] like Figures 1 to 5 As shown, in one embodiment, the nozzle 20 has an L-shaped groove 202, and the first sealing ring 21 is located in the L-shaped groove 202.

[0038] It should be noted that an L-shaped groove 202 is provided on the inner sidewall of the upper end of the nozzle 20. The L-shaped groove 202 is opened along the circumference of the inner sidewall of the nozzle 20, so that the cross-section of the L-shaped groove 202 is an L-shaped structure. Furthermore, when the nozzle 20 is coaxially sleeved on the central tube 10, the L-shaped groove 202 and the outer sidewall of the central tube 10 together form an upward-opening U-shaped groove structure. The first sealing ring 21 is located inside the L-shaped groove 202, and the outer diameter of the first sealing ring 21 is adapted to the inner sidewall of the L-shaped groove 202, so that the inner and outer sidewalls of the first sealing ring 21 are tightly fitted with the inner sidewall of the L-shaped groove 202 and the outer sidewall of the central tube 10, respectively. Furthermore, the inner bottom wall of the L-shaped groove 202 abuts against the end of the first sealing ring 21 away from the anti-detachment plate 24, so as to prevent the first sealing ring 21 from sliding down to the middle or bottom of the central tube 10, thereby causing the first sealing ring 21 to detach from the upper end of the nozzle 20 and resulting in sealing failure.

[0039] like Figures 1 to 4 As shown, in one embodiment, the upper end of the nozzle 20 is provided with a first convex rail 203, the lower end of the nozzle 20 is provided with a second convex rail 204, the upper end of the central tube 10 is provided with a first slot 101, the lower end of the central tube 10 is provided with a second slot 102, the first convex rail 203 extends into the first slot 101 without contact, and the second convex rail 204 extends into the second slot 102 without contact.

[0040] It should be noted that a first protruding rail 203 is provided on the upper side of the nozzle 20 near the groove 205, and a second protruding rail 204 is provided on the lower side of the nozzle 20 near the groove 205. Furthermore, a first slot 101 is provided at the upper end of the central tube 10, and the width of the first slot 101 is greater than the thickness of the first protruding rail 203, allowing the first protruding rail 203 to be inserted into the first slot 101 without contact. A second slot 102 is provided at the lower end of the central tube 10, and the width of the second slot 102 is greater than the thickness of the second protruding rail 204. When the nozzle 20 is fitted onto the central tube 10, the first protruding rail 203 extends into the first slot 101 without contact, forming a C-shaped channel between the upper channel and the annular chamber 206. Similarly, the second protruding rail 204 extends into the second slot 102 without contact, forming a C-shaped channel between the lower channel and the annular chamber 206. Thus, the water in the annular chamber 206 needs to pass through a C-shaped channel when flowing into the upper and lower channels respectively, further reducing the pressure of the water flowing into the upper and lower channels, thereby improving the sealing effect of the first sealing ring 21 and the second sealing ring 22. It should be noted that the depth to which the first convex rail 203 extends into the first slot 101 and the depth to which the second convex rail 204 extends into the second slot 102 are both greater than the axial sliding distance of the nozzle 20. When the nozzle 20 slides upward to the upper limit (i.e., the first sealing ring 21 abuts against the anti-detachment plate 24), or when the nozzle 20 slides downward to the lower limit, the first convex rail 203 remains extended into the first slot 101, and the second convex rail 204 remains extended into the second slot 102. This ensures that during the sliding process of the nozzle 20, the annular chamber 206... 6 maintains a C-shaped channel with both the upper and lower channels, constantly reducing the water pressure at both ends of the annular chamber 206, further improving the sealing effect of the first sealing ring 21 and the second sealing ring 22; In one embodiment, for ease of disassembly and assembly, the inner diameter of the first convex rail 203 is smaller than the inner diameter of the second convex rail 204. When the nozzle 20 is fitted onto the central tube from top to bottom, the nozzle can drive the second convex rail to coaxially pass through the first slot, so that the first convex rail and the second convex rail extend into the first slot and the second slot respectively.

[0041] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A high-sealing, wear-resistant nozzle core, characterized in that, include: A central tube, wherein a plurality of spaced-apart perforations are formed on the outer side wall of the central tube; and A water spray assembly includes a nozzle, a first sealing ring, and a second sealing ring. The nozzle has several spray holes and is coaxially rotatably mounted on a central tube so that each spray hole communicates with the through hole. The first sealing ring and the second sealing ring are coaxially sleeved on the central tube, and the first sealing ring and the second sealing ring respectively seal the two ends of the nozzle along its axial direction.

2. The high-sealing, wear-resistant nozzle core according to claim 1, characterized in that, A bottom ring is provided at the lower end of the nozzle, and the second sealing ring is used to seal the gap between the bottom ring and the central tube.

3. The high-sealing, wear-resistant nozzle core according to claim 2, characterized in that, The water spray assembly also includes a third sealing ring, which is sleeved on the central tube and has an annular groove. The bottom ring is provided with an annular rail, which is adapted to be inserted into the annular groove.

4. The high-sealing, wear-resistant nozzle core according to claim 3, characterized in that, The water spray assembly also includes an anti-detachment plate, which is disposed at the end of the central tube and is used to prevent the nozzle from detaching from the central tube.

5. The high-sealing, wear-resistant nozzle core according to claim 4, characterized in that, The water spray assembly also includes a cover, which is disposed at the upper end of the nozzle and is used to seal the upper end of the nozzle.

6. The high-sealing, wear-resistant nozzle core according to claim 3, characterized in that, The first sealing ring, the second sealing ring, and the third sealing ring are all made of graphene composite material.

7. The high-sealing, wear-resistant nozzle core according to claim 6, characterized in that, The nozzle has an L-shaped groove, and the first sealing ring is located in the L-shaped groove.

8. The high-sealing, wear-resistant nozzle core according to claim 7, characterized in that, The nozzle has a first convex rail at its upper end and a second convex rail at its lower end. The central tube has a first slot at its upper end and a second slot at its lower end. The first convex rail extends into the first slot without contact, and the second convex rail extends into the second slot without contact.

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